diff --git a/Makefile b/Makefile
index 5943a7e..fe091db 100644
--- a/Makefile
+++ b/Makefile
@@ -128,6 +128,7 @@ PRINT = runoff.list $(FILES)
xv6.pdf: $(PRINT)
./runoff
+ ls -l xv6.pdf
print: xv6.pdf
diff --git a/bootother.S b/bootother.S
index 47f547e..9005d48 100644
--- a/bootother.S
+++ b/bootother.S
@@ -38,7 +38,7 @@ start:
//PAGEBREAK!
# Switch from real to protected mode, using a bootstrap GDT
# and segment translation that makes virtual addresses
- # identical to their physical addresses, so that the
+ # identical to physical addresses, so that the
# effective memory map does not change during the switch.
lgdt gdtdesc
movl %cr0, %eax
@@ -47,10 +47,10 @@ start:
# Jump to next instruction, but in 32-bit code segment.
# Switches processor into 32-bit mode.
- ljmp $(SEG_KCODE<<3), $protcseg
+ ljmp $(SEG_KCODE<<3), $start32
- .code32 # Assemble for 32-bit mode
-protcseg:
+.code32 # Assemble for 32-bit mode
+start32:
# Set up the protected-mode data segment registers
movw $(SEG_KDATA<<3), %ax # Our data segment selector
movw %ax, %ds # -> DS: Data Segment
@@ -60,11 +60,11 @@ protcseg:
movw %ax, %fs # -> FS
movw %ax, %gs # -> GS
+ # Set up the stack pointer and call into C.
movl start-4, %esp
- movl start-8, %eax
- call *%eax
+ call *(start-8)
- # If bootmain returns (it shouldn't), trigger a Bochs
+ # If the call returns (it shouldn't), trigger a Bochs
# breakpoint if running under Bochs, then loop.
movw $0x8a00, %ax # 0x8a00 -> port 0x8a00
movw %ax, %dx
diff --git a/console.c b/console.c
index 6834c6a..9d2ef60 100644
--- a/console.c
+++ b/console.c
@@ -7,22 +7,120 @@
#include "param.h"
#include "traps.h"
#include "spinlock.h"
-#include "dev.h"
+#include "fs.h"
+#include "file.h"
#include "mmu.h"
#include "proc.h"
#include "x86.h"
-#define CRTPORT 0x3d4
-#define BACKSPACE 0x100
+static void consputc(int);
-static ushort *crt = (ushort*)0xb8000; // CGA memory
+static int panicked = 0;
static struct {
struct spinlock lock;
int locking;
} cons;
-static int panicked = 0;
+static void
+printint(int xx, int base, int sgn)
+{
+ static char digits[] = "0123456789abcdef";
+ char buf[16];
+ int i = 0, neg = 0;
+ uint x;
+
+ if(sgn && xx < 0){
+ neg = 1;
+ x = -xx;
+ } else
+ x = xx;
+
+ do{
+ buf[i++] = digits[x % base];
+ }while((x /= base) != 0);
+ if(neg)
+ buf[i++] = '-';
+
+ while(--i >= 0)
+ consputc(buf[i]);
+}
+
+//PAGEBREAK: 50
+// Print to the console. only understands %d, %x, %p, %s.
+void
+cprintf(char *fmt, ...)
+{
+ int i, c, state, locking;
+ uint *argp;
+ char *s;
+
+ locking = cons.locking;
+ if(locking)
+ acquire(&cons.lock);
+
+ argp = (uint*)(void*)&fmt + 1;
+ state = 0;
+ for(i = 0; (c = fmt[i] & 0xff) != 0; i++){
+ if(c != '%'){
+ consputc(c);
+ continue;
+ }
+ c = fmt[++i] & 0xff;
+ if(c == 0)
+ break;
+ switch(c){
+ case 'd':
+ printint(*argp++, 10, 1);
+ break;
+ case 'x':
+ case 'p':
+ printint(*argp++, 16, 0);
+ break;
+ case 's':
+ if((s = (char*)*argp++) == 0)
+ s = "(null)";
+ for(; *s; s++)
+ consputc(*s);
+ break;
+ case '%':
+ consputc('%');
+ break;
+ default:
+ // Print unknown % sequence to draw attention.
+ consputc('%');
+ consputc(c);
+ break;
+ }
+ }
+
+ if(locking)
+ release(&cons.lock);
+}
+
+void
+panic(char *s)
+{
+ int i;
+ uint pcs[10];
+
+ cli();
+ cons.locking = 0;
+ cprintf("cpu%d: panic: ", cpu());
+ cprintf(s);
+ cprintf("\n");
+ getcallerpcs(&s, pcs);
+ for(i=0; i<10; i++)
+ cprintf(" %p", pcs[i]);
+ panicked = 1; // freeze other CPU
+ for(;;)
+ ;
+}
+
+//PAGEBREAK: 50
+#define BACKSPACE 0x100
+#define CRTPORT 0x3d4
+static ushort *crt = (ushort*)0xb8000; // CGA memory
static void
cgaputc(int c)
@@ -69,104 +167,7 @@ consputc(int c)
cgaputc(c);
}
-void
-printint(int xx, int base, int sgn)
-{
- static char digits[] = "0123456789abcdef";
- char buf[16];
- int i = 0, neg = 0;
- uint x;
-
- if(sgn && xx < 0){
- neg = 1;
- x = 0 - xx;
- } else {
- x = xx;
- }
-
- do{
- buf[i++] = digits[x % base];
- }while((x /= base) != 0);
- if(neg)
- buf[i++] = '-';
-
- while(--i >= 0)
- consputc(buf[i]);
-}
-
-// Print to the console. only understands %d, %x, %p, %s.
-void
-cprintf(char *fmt, ...)
-{
- int i, c, state, locking;
- uint *argp;
- char *s;
-
- locking = cons.locking;
- if(locking)
- acquire(&cons.lock);
-
- argp = (uint*)(void*)&fmt + 1;
- state = 0;
- for(i = 0; fmt[i]; i++){
- c = fmt[i] & 0xff;
- switch(state){
- case 0:
- if(c == '%')
- state = '%';
- else
- consputc(c);
- break;
-
- case '%':
- switch(c){
- case 'd':
- printint(*argp++, 10, 1);
- break;
- case 'x':
- case 'p':
- printint(*argp++, 16, 0);
- break;
- case 's':
- s = (char*)*argp++;
- if(s == 0)
- s = "(null)";
- for(; *s; s++)
- consputc(*s);
- break;
- case '%':
- consputc('%');
- break;
- default:
- // Print unknown % sequence to draw attention.
- consputc('%');
- consputc(c);
- break;
- }
- state = 0;
- break;
- }
- }
-
- if(locking)
- release(&cons.lock);
-}
-
-int
-consolewrite(struct inode *ip, char *buf, int n)
-{
- int i;
-
- iunlock(ip);
- acquire(&cons.lock);
- for(i = 0; i < n; i++)
- consputc(buf[i] & 0xff);
- release(&cons.lock);
- ilock(ip);
-
- return n;
-}
-
+//PAGEBREAK: 50
#define INPUT_BUF 128
struct {
struct spinlock lock;
@@ -255,6 +256,21 @@ consoleread(struct inode *ip, char *dst, int n)
return target - n;
}
+int
+consolewrite(struct inode *ip, char *buf, int n)
+{
+ int i;
+
+ iunlock(ip);
+ acquire(&cons.lock);
+ for(i = 0; i < n; i++)
+ consputc(buf[i] & 0xff);
+ release(&cons.lock);
+ ilock(ip);
+
+ return n;
+}
+
void
consoleinit(void)
{
@@ -269,22 +285,3 @@ consoleinit(void)
ioapicenable(IRQ_KBD, 0);
}
-void
-panic(char *s)
-{
- int i;
- uint pcs[10];
-
- cli();
- cons.locking = 0;
- cprintf("cpu%d: panic: ", cpu());
- cprintf(s);
- cprintf("\n");
- getcallerpcs(&s, pcs);
- for(i=0; i<10; i++)
- cprintf(" %p", pcs[i]);
- panicked = 1; // freeze other CPU
- for(;;)
- ;
-}
-
diff --git a/defs.h b/defs.h
index 09fa467..12d04aa 100644
--- a/defs.h
+++ b/defs.h
@@ -91,6 +91,7 @@ void pipeclose(struct pipe*, int);
int piperead(struct pipe*, char*, int);
int pipewrite(struct pipe*, char*, int);
+//PAGEBREAK: 16
// proc.c
struct proc* copyproc(struct proc*);
void exit(void);
diff --git a/dev.h b/dev.h
deleted file mode 100644
index 48d31d3..0000000
--- a/dev.h
+++ /dev/null
@@ -1,8 +0,0 @@
-struct devsw {
- int (*read)(struct inode*, char*, int);
- int (*write)(struct inode*, char*, int);
-};
-
-extern struct devsw devsw[];
-
-#define CONSOLE 1
diff --git a/elf.h b/elf.h
index 28bbd23..17f8321 100644
--- a/elf.h
+++ b/elf.h
@@ -40,21 +40,3 @@ struct proghdr {
#define ELF_PROG_FLAG_EXEC 1
#define ELF_PROG_FLAG_WRITE 2
#define ELF_PROG_FLAG_READ 4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-// Blank page.
diff --git a/exec.c b/exec.c
index 3be3eed..bee960e 100644
--- a/exec.c
+++ b/exec.c
@@ -11,7 +11,7 @@ exec(char *path, char **argv)
{
char *mem, *s, *last;
int i, argc, arglen, len, off;
- uint sz, sp, argp;
+ uint sz, sp, argp, x;
struct elfhdr elf;
struct inode *ip;
struct proghdr ph;
@@ -67,7 +67,9 @@ exec(char *path, char **argv)
goto bad;
if(ph.type != ELF_PROG_LOAD)
continue;
- if(ph.va + ph.memsz < ph.va || ph.va + ph.memsz > sz || ph.memsz < ph.filesz)
+ if(ph.va + ph.memsz < ph.va || ph.va + ph.memsz > sz)
+ goto bad;
+ if(ph.memsz < ph.filesz)
goto bad;
if(readi(ip, mem + ph.va, ph.offset, ph.filesz) != ph.filesz)
goto bad;
diff --git a/file.c b/file.c
index 12b1561..e10b824 100644
--- a/file.c
+++ b/file.c
@@ -1,9 +1,9 @@
#include "types.h"
#include "defs.h"
#include "param.h"
+#include "fs.h"
#include "file.h"
#include "spinlock.h"
-#include "dev.h"
struct devsw devsw[NDEV];
struct {
diff --git a/file.h b/file.h
index 1d56145..55918cc 100644
--- a/file.h
+++ b/file.h
@@ -7,3 +7,35 @@ struct file {
struct inode *ip;
uint off;
};
+
+
+// in-core file system types
+
+struct inode {
+ uint dev; // Device number
+ uint inum; // Inode number
+ int ref; // Reference count
+ int flags; // I_BUSY, I_VALID
+
+ short type; // copy of disk inode
+ short major;
+ short minor;
+ short nlink;
+ uint size;
+ uint addrs[NDIRECT+1];
+};
+
+#define I_BUSY 0x1
+#define I_VALID 0x2
+
+
+// device implementations
+
+struct devsw {
+ int (*read)(struct inode*, char*, int);
+ int (*write)(struct inode*, char*, int);
+};
+
+extern struct devsw devsw[];
+
+#define CONSOLE 1
diff --git a/fs.c b/fs.c
index fe65338..15b0bfe 100644
--- a/fs.c
+++ b/fs.c
@@ -19,8 +19,7 @@
#include "spinlock.h"
#include "buf.h"
#include "fs.h"
-#include "fsvar.h"
-#include "dev.h"
+#include "file.h"
#define min(a, b) ((a) < (b) ? (a) : (b))
static void itrunc(struct inode*);
diff --git a/fsvar.h b/fsvar.h
deleted file mode 100644
index 7f135a9..0000000
--- a/fsvar.h
+++ /dev/null
@@ -1,18 +0,0 @@
-// in-core file system types
-
-struct inode {
- uint dev; // Device number
- uint inum; // Inode number
- int ref; // Reference count
- int flags; // I_BUSY, I_VALID
-
- short type; // copy of disk inode
- short major;
- short minor;
- short nlink;
- uint size;
- uint addrs[NDIRECT+1];
-};
-
-#define I_BUSY 0x1
-#define I_VALID 0x2
diff --git a/picirq.c b/picirq.c
index ff86831..1230c13 100644
--- a/picirq.c
+++ b/picirq.c
@@ -82,3 +82,32 @@ picinit(void)
if(irqmask != 0xFFFF)
picsetmask(irqmask);
}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+// Blank page.
diff --git a/pipe.c b/pipe.c
index 3032775..29c01b2 100644
--- a/pipe.c
+++ b/pipe.c
@@ -3,6 +3,7 @@
#include "param.h"
#include "mmu.h"
#include "proc.h"
+#include "fs.h"
#include "file.h"
#include "spinlock.h"
@@ -72,7 +73,7 @@ pipeclose(struct pipe *p, int writable)
release(&p->lock);
}
-//PAGEBREAK: 30
+//PAGEBREAK: 40
int
pipewrite(struct pipe *p, char *addr, int n)
{
diff --git a/proc.c b/proc.c
index 4333512..d111008 100644
--- a/proc.c
+++ b/proc.c
@@ -23,6 +23,79 @@ pinit(void)
initlock(&ptable.lock, "ptable");
}
+//PAGEBREAK: 36
+// Print a process listing to console. For debugging.
+// Runs when user types ^P on console.
+// No lock to avoid wedging a stuck machine further.
+void
+procdump(void)
+{
+ static char *states[] = {
+ [UNUSED] "unused",
+ [EMBRYO] "embryo",
+ [SLEEPING] "sleep ",
+ [RUNNABLE] "runble",
+ [RUNNING] "run ",
+ [ZOMBIE] "zombie"
+ };
+ int i;
+ struct proc *p;
+ char *state;
+ uint pc[10];
+
+ for(p = ptable.proc; p < &ptable.proc[NPROC]; p++){
+ if(p->state == UNUSED)
+ continue;
+ if(p->state >= 0 && p->state < NELEM(states) && states[p->state])
+ state = states[p->state];
+ else
+ state = "???";
+ cprintf("%d %s %s", p->pid, state, p->name);
+ if(p->state == SLEEPING){
+ getcallerpcs((uint*)p->context->ebp+2, pc);
+ for(i=0; i<10 && pc[i] != 0; i++)
+ cprintf(" %p", pc[i]);
+ }
+ cprintf("\n");
+ }
+}
+
+// Set up CPU's kernel segment descriptors.
+// Run once at boot time on each CPU.
+void
+ksegment(void)
+{
+ struct cpu *c1;
+
+ c1 = &cpus[cpu()];
+ c1->gdt[SEG_KCODE] = SEG(STA_X|STA_R, 0, 0x100000 + 64*1024-1, 0);
+ c1->gdt[SEG_KDATA] = SEG(STA_W, 0, 0xffffffff, 0);
+ c1->gdt[SEG_KCPU] = SEG(STA_W, (uint)(&c1->tls+1), 0xffffffff, 0);
+ lgdt(c1->gdt, sizeof(c1->gdt));
+ loadfsgs(SEG_KCPU << 3);
+
+ // Initialize cpu-local variables.
+ c = c1;
+ cp = 0;
+}
+
+// Set up CPU's segment descriptors and current process task state.
+// If cp==0, set up for "idle" state for when scheduler() is running.
+void
+usegment(void)
+{
+ pushcli();
+ c->gdt[SEG_UCODE] = SEG(STA_X|STA_R, (uint)cp->mem, cp->sz-1, DPL_USER);
+ c->gdt[SEG_UDATA] = SEG(STA_W, (uint)cp->mem, cp->sz-1, DPL_USER);
+ c->gdt[SEG_TSS] = SEG16(STS_T32A, (uint)&c->ts, sizeof(c->ts)-1, 0);
+ c->gdt[SEG_TSS].s = 0;
+ c->ts.ss0 = SEG_KDATA << 3;
+ c->ts.esp0 = (uint)cp->kstack + KSTACKSIZE;
+ ltr(SEG_TSS << 3);
+ popcli();
+}
+
+//PAGEBREAK: 15
// Look in the process table for an UNUSED proc.
// If found, change state to EMBRYO and return it.
// Otherwise return 0.
@@ -67,6 +140,37 @@ found:
return p;
}
+// Set up first user process.
+void
+userinit(void)
+{
+ struct proc *p;
+ extern char _binary_initcode_start[], _binary_initcode_size[];
+
+ p = allocproc();
+ initproc = p;
+
+ // Initialize memory from initcode.S
+ p->sz = PAGE;
+ p->mem = kalloc(p->sz);
+ memset(p->mem, 0, p->sz);
+ memmove(p->mem, _binary_initcode_start, (int)_binary_initcode_size);
+
+ memset(p->tf, 0, sizeof(*p->tf));
+ p->tf->cs = (SEG_UCODE << 3) | DPL_USER;
+ p->tf->ds = (SEG_UDATA << 3) | DPL_USER;
+ p->tf->es = p->tf->ds;
+ p->tf->ss = p->tf->ds;
+ p->tf->eflags = FL_IF;
+ p->tf->esp = p->sz;
+ p->tf->eip = 0; // beginning of initcode.S
+
+ safestrcpy(p->name, "initcode", sizeof(p->name));
+ p->cwd = namei("/");
+
+ p->state = RUNNABLE;
+}
+
// Grow current process's memory by n bytes.
// Return 0 on success, -1 on failure.
int
@@ -86,41 +190,6 @@ growproc(int n)
return 0;
}
-// Set up CPU's kernel segment descriptors.
-// Run once at boot time on each CPU.
-void
-ksegment(void)
-{
- struct cpu *c1;
-
- c1 = &cpus[cpu()];
- c1->gdt[SEG_KCODE] = SEG(STA_X|STA_R, 0, 0x100000 + 64*1024-1, 0);
- c1->gdt[SEG_KDATA] = SEG(STA_W, 0, 0xffffffff, 0);
- c1->gdt[SEG_KCPU] = SEG(STA_W, (uint)(&c1->tls+1), 0xffffffff, 0);
- lgdt(c1->gdt, sizeof(c1->gdt));
- loadfsgs(SEG_KCPU << 3);
-
- // Initialize cpu-local variables.
- c = c1;
- cp = 0;
-}
-
-// Set up CPU's segment descriptors and task state for the current process.
-// If cp==0, set up for "idle" state for when scheduler() is running.
-void
-usegment(void)
-{
- pushcli();
- c->gdt[SEG_UCODE] = SEG(STA_X|STA_R, (uint)cp->mem, cp->sz-1, DPL_USER);
- c->gdt[SEG_UDATA] = SEG(STA_W, (uint)cp->mem, cp->sz-1, DPL_USER);
- c->gdt[SEG_TSS] = SEG16(STS_T32A, (uint)&c->ts, sizeof(c->ts)-1, 0);
- c->gdt[SEG_TSS].s = 0;
- c->ts.ss0 = SEG_KDATA << 3;
- c->ts.esp0 = (uint)cp->kstack + KSTACKSIZE;
- ltr(SEG_TSS << 3);
- popcli();
-}
-
// Create a new process copying p as the parent.
// Sets up stack to return as if from system call.
// Caller must set state of returned proc to RUNNABLE.
@@ -160,37 +229,6 @@ fork(void)
return pid;
}
-// Set up first user process.
-void
-userinit(void)
-{
- struct proc *p;
- extern char _binary_initcode_start[], _binary_initcode_size[];
-
- p = allocproc();
- initproc = p;
-
- // Initialize memory from initcode.S
- p->sz = PAGE;
- p->mem = kalloc(p->sz);
- memset(p->mem, 0, p->sz);
- memmove(p->mem, _binary_initcode_start, (int)_binary_initcode_size);
-
- memset(p->tf, 0, sizeof(*p->tf));
- p->tf->cs = (SEG_UCODE << 3) | DPL_USER;
- p->tf->ds = (SEG_UDATA << 3) | DPL_USER;
- p->tf->es = p->tf->ds;
- p->tf->ss = p->tf->ds;
- p->tf->eflags = FL_IF;
- p->tf->esp = p->sz;
- p->tf->eip = 0; // beginning of initcode.S
-
- safestrcpy(p->name, "initcode", sizeof(p->name));
- p->cwd = namei("/");
-
- p->state = RUNNABLE;
-}
-
//PAGEBREAK: 42
// Per-CPU process scheduler.
// Each CPU calls scheduler() after setting itself up.
@@ -440,39 +478,3 @@ wait(void)
}
}
-// Print a process listing to console. For debugging.
-// Runs when user types ^P on console.
-// No lock to avoid wedging a stuck machine further.
-void
-procdump(void)
-{
- static char *states[] = {
- [UNUSED] "unused",
- [EMBRYO] "embryo",
- [SLEEPING] "sleep ",
- [RUNNABLE] "runble",
- [RUNNING] "run ",
- [ZOMBIE] "zombie"
- };
- int i;
- struct proc *p;
- char *state;
- uint pc[10];
-
- for(p = ptable.proc; p < &ptable.proc[NPROC]; p++){
- if(p->state == UNUSED)
- continue;
- if(p->state >= 0 && p->state < NELEM(states) && states[p->state])
- state = states[p->state];
- else
- state = "???";
- cprintf("%d %s %s", p->pid, state, p->name);
- if(p->state == SLEEPING){
- getcallerpcs((uint*)p->context->ebp+2, pc);
- for(i=0; i<10 && pc[i] != 0; i++)
- cprintf(" %p", pc[i]);
- }
- cprintf("\n");
- }
-}
-
diff --git a/runoff b/runoff
index 3da62b4..21ee8ed 100755
--- a/runoff
+++ b/runoff
@@ -45,6 +45,7 @@ cat toc.ftr >>fmt/toc
# check for bad alignments
perl -e '
+ $leftwarn = 0;
while(<>){
chomp;
s!#.*!!;
@@ -75,12 +76,35 @@ perl -e '
print STDERR "Have no toc for $file\n";
next;
}
- if($toc{$file} =~ /^\d\d[^5]/){
+ if($toc{$file} !~ /^\d\d5/){
print STDERR "$file does not start on a second half page.\n";
}
next;
}
+ if(/(left|right): (.*)/){
+ $what = $1;
+ $file = $2;
+ if(!defined($toc{$file})){
+ print STDERR "Have no toc for $file\n";
+ next;
+ }
+ # this assumes that sheet 1 of code is a left page
+ # double-check the PDF
+ if(!$leftwarn++) {
+ print STDERR "assuming that sheet 1 is a left page. double-check!\n";
+ }
+ if($what eq "left" && !($toc{$file} =~ /^\d[13579]0/)){
+ print STDERR "$file does not start on a fresh left page [$toc{$file}]\n";
+ }
+ # why does this not work if I inline $x in the if?
+ $x = ($toc{$file} =~ /^\d[02468]0/);
+ if($what eq "right" && !$x){
+ print STDERR "$file does not start on a fresh right page [$toc{$file}] [$x]\n";
+ }
+ next;
+ }
+
print STDERR "Unknown spec: $_\n";
}
' fmt/tocdata runoff.spec
diff --git a/runoff.list b/runoff.list
index 5a8a2f9..3bf6c87 100644
--- a/runoff.list
+++ b/runoff.list
@@ -34,12 +34,10 @@ sysproc.c
# file system
buf.h
-dev.h
fcntl.h
stat.h
-file.h
fs.h
-fsvar.h
+file.h
ide.c
bio.c
fs.c
diff --git a/runoff.spec b/runoff.spec
index 76ecb73..dbd6d5c 100644
--- a/runoff.spec
+++ b/runoff.spec
@@ -12,20 +12,27 @@ even: bootother.S # mild preference
# bootmain.c either
even: main.c
# mp.c don't care at all
-even: initcode.S
-odd: init.c
+# even: initcode.S
+# odd: init.c
# spinlock.h either
# spinlock.c either
even: proc.h # mild preference
-even: proc.c # VERY important
+
+# goal is to have two action-packed 2-page spreads,
+# one with
+# ksegment usegment allocproc userinit growproc fork
+# and another with
+# scheduler sched yield forkret sleep wakeup1 wakeup
+right: proc.c # VERY important
+
# setjmp.S either
# kalloc.c either
# syscall.h either
# trapasm.S either
# traps.h either
-even: trap.c # important
+# even: trap.c
# vectors.pl either
# syscall.c either
# sysproc.c either
@@ -37,7 +44,7 @@ even: trap.c # important
# file.h either
# fs.h either
# fsvar.h either
-# even: ide.c
+left: ide.c
# odd: bio.c
odd: fs.c # VERY important
# file.c either
@@ -46,5 +53,6 @@ odd: fs.c # VERY important
# even: pipe.c # mild preference
# string.c either
+left: kbd.h
even: console.c
odd: sh.c
diff --git a/sysfile.c b/sysfile.c
index 4d891c1..ae7d07c 100644
--- a/sysfile.c
+++ b/sysfile.c
@@ -5,7 +5,6 @@
#include "mmu.h"
#include "proc.h"
#include "fs.h"
-#include "fsvar.h"
#include "file.h"
#include "fcntl.h"
diff --git a/timer.c b/timer.c
index 8fdecee..8df75a9 100644
--- a/timer.c
+++ b/timer.c
@@ -30,36 +30,3 @@ timerinit(void)
outb(IO_TIMER1, TIMER_DIV(100) / 256);
picenable(IRQ_TIMER);
}
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-// Blank page
-
-
-
-
-
-
-
-
-
-
-
-
-
-
diff --git a/trap.c b/trap.c
index 5f1cafb..651a9d6 100644
--- a/trap.c
+++ b/trap.c
@@ -31,6 +31,7 @@ idtinit(void)
lidt(idt, sizeof(idt));
}
+//PAGEBREAK: 41
void
trap(struct trapframe *tf)
{
diff --git a/uart.c b/uart.c
index 4cd1e0f..576e254 100644
--- a/uart.c
+++ b/uart.c
@@ -5,7 +5,8 @@
#include "param.h"
#include "traps.h"
#include "spinlock.h"
-#include "dev.h"
+#include "fs.h"
+#include "file.h"
#include "mmu.h"
#include "proc.h"
#include "x86.h"
diff --git a/x86.h b/x86.h
index 934b9ec..e754b28 100644
--- a/x86.h
+++ b/x86.h
@@ -122,6 +122,7 @@ sti(void)
asm volatile("sti");
}
+//PAGEBREAK: 36
// Layout of the trap frame built on the stack by the
// hardware and by trapasm.S, and passed to trap().
struct trapframe {
diff --git a/xv6.pdf b/xv6.pdf
index 16f6d54..fd4efde 100644
Binary files a/xv6.pdf and b/xv6.pdf differ
diff --git a/xv6.ps b/xv6.ps
index 4a90f7b..8a4868e 100644
--- a/xv6.ps
+++ b/xv6.ps
@@ -1,4 +1,7 @@
%!PS-Adobe-3.0
+% Produced by xpdf/pdftops 3.02
+%%Creator: mpage 2.5.6 Januari 2008
+%%Title: <stdin> (mpage)
%%LanguageLevel: 2
%%DocumentSuppliedResources: (atend)
%%DocumentMedia: plain 612 792 0 () ()
@@ -9,8 +12,8 @@
%%PageMedia: plain
%%EndDefaults
%%BeginProlog
-%%BeginResource: procset xpdf 3.00 0
-%%Copyright: Copyright 1996-2004 Glyph & Cog, LLC
+%%BeginResource: procset xpdf 3.02 0
+%%Copyright: Copyright 1996-2007 Glyph & Cog, LLC
/xpdf 75 dict def xpdf begin
% PDF special state
/pdfDictSize 15 def
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false op
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{} settransfer
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false OP
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-(3328 3375 3378 3423) 83.0018 Tj
-17.4613 -351.2532 Td
-(0414 0417 0751 2510) 83.0018 Tj
--8527.14 TJm
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-0 -360.7465 Td
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--9530.47 TJm
-(ide_wait_ready 3332) 83.0018 Tj
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-(0312 1392 1422 2129) 83.0018 Tj
--8527.14 TJm
-(3332 3358 3380 3413) 83.0018 Tj
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--14045.6 TJm
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-0 -389.2266 Td
+(Aug 8 01:04 2009 cross-references Page 4) 187.8461 Tj
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(getcmd 6984) 48.0537 Tj
--14547 TJm
-(0340 1256 2528) 61.1592 Tj
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(6984 7015) 39.3166 Tj
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-(0237 1742 3838 4361) 83.0018 Tj
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(7156 7241 7245 7257) 83.0018 Tj
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(7270 7271 7307 7311) 83.0018 Tj
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(7333) 17.4741 Tj
--16052.1 TJm
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-(growproc 1653) 56.7907 Tj
--11537.1 TJm
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-(0295 1653 2858) 61.1592 Tj
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Q
Q
Q
@@ -2170,6 +2175,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -2187,207 +2194,207 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 cross-references Page 5) 187.8461 Tj
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-(4774 4809 4813 4825) 83.0018 Tj
--8527.14 TJm
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-(4867 4937 5020 6444) 83.0018 Tj
--6520.6 TJm
-(IO_PIC1 5957) 52.4222 Tj
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--13543.8 TJm
-(5957 5970 5985 5994) 83.0018 Tj
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-(inb 0353) 34.9481 Tj
--16052 TJm
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-(0353 0928 0936 1154) 83.0018 Tj
--8527.14 TJm
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--6520.6 TJm
-(IO_PIC2 5958) 52.4222 Tj
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--8527.14 TJm
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--13543.7 TJm
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--8527.14 TJm
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--11537.3 TJm
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-(0314 1363 1620 2231) 83.0018 Tj
--6520.6 TJm
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--8527.14 TJm
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--6520.6 TJm
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--8527.14 TJm
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--8527.14 TJm
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--6520.6 TJm
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--8527.14 TJm
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--6520.6 TJm
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--8527.14 TJm
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--6520.6 TJm
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--8527.14 TJm
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--6520.6 TJm
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-(4753 4800 4804 4856) 83.0018 Tj
--8527.14 TJm
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--8527.14 TJm
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--13543.8 TJm
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-(INPUT_BUF 6450) 61.1592 Tj
--13042 TJm
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-(6450 6453 6474 6486) 83.0018 Tj
--6520.6 TJm
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--11035.5 TJm
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--13543.8 TJm
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-(0362 1173 3414) 61.1592 Tj
--11035.5 TJm
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(INT_DISABLED 5869) 74.2647 Tj
--9530.47 TJm
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--13543.8 TJm
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--14547 TJm
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--13042 TJm
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--8527.14 TJm
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--14045.6 TJm
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--6520.6 TJm
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Q
Q
q
@@ -2404,207 +2411,207 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
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0 -28.4801 Td
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-(0242 3924 4366 4375) 83.0018 Tj
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Q
Q
Q
@@ -2633,6 +2640,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -2650,207 +2659,207 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
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--12038.8 TJm
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--12540.5 TJm
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--6520.6 TJm
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--13042.1 TJm
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Q
Q
Q
@@ -3559,6 +3570,8 @@ pdfStartPage
false op
false OP
{} settransfer
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+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -3576,207 +3589,207 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
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17.4613 -474.6665 Td
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17.4613 -493.6532 Td
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Q
Q
q
@@ -3793,55 +3806,73 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
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+-14547 TJm
+(3639 3941 3966 5216) 83.0018 Tj
+17.4613 -75.9465 Td
+(0353 1228 2566) 61.1592 Tj
+-11035.5 TJm
+(5219 5241 5246 5268) 83.0018 Tj
+0 -85.4399 Td
+(usegment 1722) 56.7907 Tj
+-13543.7 TJm
+(6541) 17.4741 Tj
+17.4613 -94.9332 Td
+(0310 1722 1846 1926) 83.0018 Tj
+-6520.6 TJm
+(wakeup1 2053) 52.4222 Tj
+17.4613 -104.4266 Td
+(5112) 17.4741 Tj
+-16052.1 TJm
+(2053 2067 2126 2133) 83.0018 Tj
+0 -113.9199 Td
+(userinit 1802) 56.7907 Tj
+-11537.1 TJm
+(writei 4152) 48.0537 Tj
+17.4613 -123.4133 Td
+(0312 1235 1802) 61.1592 Tj
+-11035.5 TJm
+(0249 4152 4274 4532) 83.0018 Tj
+0 -132.9067 Td
(VER 5661) 34.9481 Tj
-16052 TJm
-(6491) 17.4741 Tj
-17.4613 -37.9735 Td
+(4785 4786) 39.3166 Tj
+17.4613 -142.4 Td
(5661 5723) 39.3166 Tj
-11537.3 TJm
-(wakeup1 1953) 52.4222 Tj
-0 -47.4664 Td
-(wait 2053) 39.3166 Tj
+(xchg 0501) 39.3166 Tj
+0 -151.8934 Td
+(wait 2153) 39.3166 Tj
-15550.3 TJm
-(1953 1968 2026 2033) 83.0018 Tj
-17.4613 -56.9598 Td
-(0303 2053 2829 6783) 83.0018 Tj
+(0501 1260 1382 1419) 83.0018 Tj
+17.4613 -161.3867 Td
+(0313 2153 2923 6762) 83.0018 Tj
-6520.6 TJm
-(writei 4152) 48.0537 Tj
-17.4613 -66.4531 Td
-(6812 6944 6970 6971) 83.0018 Tj
+(yield 1973) 43.6851 Tj
+17.4613 -170.8801 Td
+(6833 6944 6970 6971) 83.0018 Tj
-8527.14 TJm
-(0249 4152 4274 4532) 83.0018 Tj
-17.4613 -75.9465 Td
+(0315 1973 2664) 61.1592 Tj
+17.4613 -180.3735 Td
(7026) 17.4741 Tj
--16052.1 TJm
-(4785 4786) 39.3166 Tj
-0 -85.4399 Td
-(waitdisk 1151) 56.7907 Tj
--11537.1 TJm
-(xchg 0451) 39.3166 Tj
-17.4613 -94.9332 Td
-(1151 1163 1172) 61.1592 Tj
--11035.5 TJm
-(0451 1260 1384 1415) 83.0018 Tj
-0 -104.4266 Td
-(wakeup 1965) 48.0537 Tj
--12540.5 TJm
-(yield 1869) 43.6851 Tj
-17.4613 -113.9199 Td
-(0304 1965 2551 3419) 83.0018 Tj
--8527.14 TJm
-(0305 1869 2592) 61.1592 Tj
-17.4613 -123.4133 Td
-(3639 3891 3916 5220) 83.0018 Tj
--6520.6 TJm
-(_namei 4354) 48.0537 Tj
-17.4613 -132.9067 Td
-(5223 5262 5267 5290) 83.0018 Tj
--8527.14 TJm
-(4354 4392 4398) 61.1592 Tj
Q
Q
Q
@@ -3870,6 +3901,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -3887,7 +3920,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/types.h Page 1) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/types.h Page 1) 166.0035 Tj
0 -28.4801 Td
(0100 typedef unsigned int uint;) 144.161 Tj
0 -37.9735 Td
@@ -4006,7 +4039,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/param.h Page 1) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/param.h Page 1) 166.0035 Tj
0 -28.4801 Td
(0150 #define NPROC 64 // maximum number of processes) 262.1109 Tj
0 -37.9735 Td
@@ -4141,6 +4174,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -4158,7 +4193,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/defs.h Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/defs.h Page 1) 161.635 Tj
0 -28.4801 Td
(0200 struct buf;) 69.8962 Tj
0 -37.9735 Td
@@ -4192,11 +4227,11 @@ q
0 -170.8805 Td
(0215 // console.c) 74.2647 Tj
0 -180.3739 Td
-(0216 void console_init\(void\);) 174.7406 Tj
+(0216 void consoleinit\(void\);) 170.3721 Tj
0 -189.8672 Td
(0217 void cprintf\(char*, ...\);) 179.1091 Tj
0 -199.3606 Td
-(0218 void console_intr\(int\(*\)\(void\)\);) 209.6887 Tj
+(0218 void consoleintr\(int\(*\)\(void\)\);) 205.3202 Tj
0 -208.8539 Td
(0219 void panic\(char*\) __attribute__\(\(noreturn\)\
\);) 262.1109 Tj
@@ -4279,25 +4314,25 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/defs.h Page 2) 161.635 Tj
+(Aug 8 01:04 2009 xv6/defs.h Page 2) 161.635 Tj
0 -28.4801 Td
(0250 // ide.c) 56.7907 Tj
0 -37.9735 Td
-(0251 void ide_init\(void\);) 157.2665 Tj
+(0251 void ideinit\(void\);) 152.898 Tj
0 -47.4668 Td
-(0252 void ide_intr\(void\);) 157.2665 Tj
+(0252 void ideintr\(void\);) 152.898 Tj
0 -56.9602 Td
-(0253 void ide_rw\(struct buf *\);) 183.4776 Tj
+(0253 void iderw\(struct buf*\);) 174.7406 Tj
0 -66.4535 Td
(0254 ) 21.8426 Tj
0 -75.9469 Td
(0255 // ioapic.c) 69.8962 Tj
0 -85.4403 Td
-(0256 void ioapic_enable\(int irq, int cpu\);) 231.5313 Tj
+(0256 void ioapicenable\(int irq, int cpu\);) 227.1628 Tj
0 -94.9336 Td
-(0257 extern uchar ioapic_id;) 135.4239 Tj
+(0257 extern uchar ioapicid;) 131.0554 Tj
0 -104.427 Td
-(0258 void ioapic_init\(void\);) 170.3721 Tj
+(0258 void ioapicinit\(void\);) 166.0035 Tj
0 -113.9203 Td
(0259 ) 21.8426 Tj
0 -123.4137 Td
@@ -4313,7 +4348,7 @@ q
0 -170.8805 Td
(0265 // kbd.c) 56.7907 Tj
0 -180.3739 Td
-(0266 void kbd_intr\(void\);) 157.2665 Tj
+(0266 void kbdintr\(void\);) 152.898 Tj
0 -189.8672 Td
(0267 ) 21.8426 Tj
0 -199.3606 Td
@@ -4323,64 +4358,63 @@ q
0 -218.3473 Td
(0270 extern volatile uint* lapic;) 157.2665 Tj
0 -227.8407 Td
-(0271 void lapic_eoi\(void\);) 161.635 Tj
+(0271 void lapiceoi\(void\);) 157.2665 Tj
0 -237.334 Td
-(0272 void lapic_init\(int\);) 161.635 Tj
+(0272 void lapicinit\(int\);) 157.2665 Tj
0 -246.8274 Td
-(0273 void lapic_startap\(uchar, uint\);) 209.6887 Tj
+(0273 void lapicstartap\(uchar, uint\);) 205.3202 Tj
0 -256.3207 Td
-(0274 ) 21.8426 Tj
+(0274 void microdelay\(int\);) 161.635 Tj
0 -265.8141 Td
-(0275 // mp.c) 52.4222 Tj
+(0275 ) 21.8426 Tj
0 -275.3075 Td
-(0276 extern int ismp;) 113.5814 Tj
+(0276 // mp.c) 52.4222 Tj
0 -284.8008 Td
-(0277 int mp_bcpu\(void\);) 152.898 Tj
+(0277 extern int ismp;) 113.5814 Tj
0 -294.2942 Td
-(0278 void mp_init\(void\);) 152.898 Tj
+(0278 int mpbcpu\(void\);) 148.5295 Tj
0 -303.7875 Td
-(0279 void mp_startthem\(void\);) 174.7406 Tj
+(0279 void mpinit\(void\);) 148.5295 Tj
0 -313.2809 Td
-(0280 ) 21.8426 Tj
+(0280 void mpstartthem\(void\);) 170.3721 Tj
0 -322.7743 Td
-(0281 // picirq.c) 69.8962 Tj
+(0281 ) 21.8426 Tj
0 -332.2676 Td
-(0282 void pic_enable\(int\);) 161.635 Tj
+(0282 // picirq.c) 69.8962 Tj
0 -341.761 Td
-(0283 void pic_init\(void\);) 157.2665 Tj
+(0283 void picenable\(int\);) 157.2665 Tj
0 -351.2543 Td
-(0284 ) 21.8426 Tj
+(0284 void picinit\(void\);) 152.898 Tj
0 -360.7477 Td
-(0285 // pipe.c) 61.1592 Tj
+(0285 ) 21.8426 Tj
0 -370.2411 Td
-(0286 int pipealloc\(struct file**, struct file**\);) 266.4794 Tj
+(0286 // pipe.c) 61.1592 Tj
0 -379.7344 Td
-(0287 void pipeclose\(struct pipe*, int\);) 218.4257 Tj
+(0287 int pipealloc\(struct file**, struct file**\);) 266.4794 Tj
0 -389.2278 Td
-(0288 int piperead\(struct pipe*, char*, int\);) 244.6368 Tj
+(0288 void pipeclose\(struct pipe*, int\);) 218.4257 Tj
0 -398.7211 Td
-(0289 int pipewrite\(struct pipe*, char*, int\);) 249.0053 Tj
+(0289 int piperead\(struct pipe*, char*, int\);) 244.6368 Tj
0 -408.2145 Td
-(0290 ) 21.8426 Tj
+(0290 int pipewrite\(struct pipe*, char*, int\);) 249.0053 Tj
0 -417.7079 Td
-(0291 // proc.c) 61.1592 Tj
+(0291 ) 21.8426 Tj
0 -427.2012 Td
-(0292 struct proc* copyproc\(struct proc*\);) 192.2146 Tj
+(0292 ) 21.8426 Tj
0 -436.6946 Td
-(0293 struct proc* curproc\(void\);) 152.898 Tj
+(0293 ) 21.8426 Tj
0 -446.1879 Td
-(0294 void exit\(void\);) 139.7925 Tj
+(0294 ) 21.8426 Tj
0 -455.6813 Td
-(0295 int growproc\(int\);) 152.898 Tj
+(0295 ) 21.8426 Tj
0 -465.1747 Td
-(0296 int kill\(int\);) 135.4239 Tj
+(0296 ) 21.8426 Tj
0 -474.668 Td
-(0297 void pinit\(void\);) 144.161 Tj
+(0297 ) 21.8426 Tj
0 -484.1614 Td
-(0298 void procdump\(void\);) 157.2665 Tj
+(0298 ) 21.8426 Tj
0 -493.6547 Td
-(0299 void scheduler\(void\) __attribute__\(\(noretur\
-n\)\);) 275.2164 Tj
+(0299 ) 21.8426 Tj
0 -522.1348 Td
(Sheet 02) 34.9481 Tj
Q
@@ -4411,6 +4445,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -4428,103 +4464,105 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/defs.h Page 3) 161.635 Tj
+(Aug 8 01:04 2009 xv6/defs.h Page 3) 161.635 Tj
0 -28.4801 Td
-(0300 void setupsegs\(struct proc*\);) 196.5831 Tj
+(0300 // proc.c) 61.1592 Tj
0 -37.9735 Td
-(0301 void sleep\(void*, struct spinlock*\);) 227.1628 Tj
+(0301 struct proc* copyproc\(struct proc*\);) 192.2146 Tj
0 -47.4668 Td
-(0302 void userinit\(void\);) 157.2665 Tj
+(0302 void exit\(void\);) 139.7925 Tj
0 -56.9602 Td
-(0303 int wait\(void\);) 139.7925 Tj
+(0303 int fork\(void\);) 139.7925 Tj
0 -66.4535 Td
-(0304 void wakeup\(void*\);) 152.898 Tj
+(0304 int growproc\(int\);) 152.898 Tj
0 -75.9469 Td
-(0305 void yield\(void\);) 144.161 Tj
+(0305 int kill\(int\);) 135.4239 Tj
0 -85.4403 Td
-(0306 ) 21.8426 Tj
+(0306 void pinit\(void\);) 144.161 Tj
0 -94.9336 Td
-(0307 // swtch.S) 65.5277 Tj
+(0307 void procdump\(void\);) 157.2665 Tj
0 -104.427 Td
-(0308 void swtch\(struct context*, struct context*\);) 266.4794 Tj
+(0308 void scheduler\(void\) __attribute__\(\(noretur\
+n\)\);) 275.2164 Tj
0 -113.9203 Td
-(0309 ) 21.8426 Tj
+(0309 void ksegment\(void\);) 157.2665 Tj
0 -123.4137 Td
-(0310 // spinlock.c) 78.6333 Tj
+(0310 void usegment\(void\);) 157.2665 Tj
0 -132.9071 Td
-(0311 void acquire\(struct spinlock*\);) 205.3202 Tj
+(0311 void sleep\(void*, struct spinlock*\);) 227.1628 Tj
0 -142.4004 Td
-(0312 void getcallerpcs\(void*, uint*\);) 209.6887 Tj
+(0312 void userinit\(void\);) 157.2665 Tj
0 -151.8938 Td
-(0313 int holding\(struct spinlock*\);) 205.3202 Tj
+(0313 int wait\(void\);) 139.7925 Tj
0 -161.3871 Td
-(0314 void initlock\(struct spinlock*, char*\);) 240.2683 Tj
+(0314 void wakeup\(void*\);) 152.898 Tj
0 -170.8805 Td
-(0315 void release\(struct spinlock*\);) 205.3202 Tj
+(0315 void yield\(void\);) 144.161 Tj
0 -180.3739 Td
-(0316 void pushcli\(\);) 135.4239 Tj
+(0316 ) 21.8426 Tj
0 -189.8672 Td
-(0317 void popcli\(\);) 131.0554 Tj
+(0317 // swtch.S) 65.5277 Tj
0 -199.3606 Td
-(0318 ) 21.8426 Tj
+(0318 void swtch\(struct context**, struct context*\)\
+;) 270.8479 Tj
0 -208.8539 Td
-(0319 // string.c) 69.8962 Tj
+(0319 ) 21.8426 Tj
0 -218.3473 Td
-(0320 int memcmp\(const void*, const void*, uint\);) 262.1109 Tj
+(0320 // spinlock.c) 78.6333 Tj
0 -227.8407 Td
-(0321 void* memmove\(void*, const void*, uint\);) 240.2683 Tj
+(0321 void acquire\(struct spinlock*\);) 205.3202 Tj
0 -237.334 Td
-(0322 void* memset\(void*, int, uint\);) 200.9517 Tj
+(0322 void getcallerpcs\(void*, uint*\);) 209.6887 Tj
0 -246.8274 Td
-(0323 char* safestrcpy\(char*, const char*, int\);) 249.0053 Tj
+(0323 int holding\(struct spinlock*\);) 205.3202 Tj
0 -256.3207 Td
-(0324 int strlen\(const char*\);) 179.1091 Tj
+(0324 void initlock\(struct spinlock*, char*\);) 240.2683 Tj
0 -265.8141 Td
-(0325 int strncmp\(const char*, const char*, uint\);) 266.4794 Tj
+(0325 void release\(struct spinlock*\);) 205.3202 Tj
0 -275.3075 Td
-(0326 char* strncpy\(char*, const char*, int\);) 235.8998 Tj
+(0326 void pushcli\(\);) 135.4239 Tj
0 -284.8008 Td
-(0327 ) 21.8426 Tj
+(0327 void popcli\(\);) 131.0554 Tj
0 -294.2942 Td
-(0328 // syscall.c) 74.2647 Tj
+(0328 ) 21.8426 Tj
0 -303.7875 Td
-(0329 int argint\(int, int*\);) 170.3721 Tj
+(0329 // string.c) 69.8962 Tj
0 -313.2809 Td
-(0330 int argptr\(int, char**, int\);) 200.9517 Tj
+(0330 int memcmp\(const void*, const void*, uint\);) 262.1109 Tj
0 -322.7743 Td
-(0331 int argstr\(int, char**\);) 179.1091 Tj
+(0331 void* memmove\(void*, const void*, uint\);) 240.2683 Tj
0 -332.2676 Td
-(0332 int fetchint\(struct proc*, uint, int*\);) 244.6368 Tj
+(0332 void* memset\(void*, int, uint\);) 200.9517 Tj
0 -341.761 Td
-(0333 int fetchstr\(struct proc*, uint, char**\);) 253.3738 Tj
+(0333 char* safestrcpy\(char*, const char*, int\);) 249.0053 Tj
0 -351.2543 Td
-(0334 void syscall\(void\);) 152.898 Tj
+(0334 int strlen\(const char*\);) 179.1091 Tj
0 -360.7477 Td
-(0335 ) 21.8426 Tj
+(0335 int strncmp\(const char*, const char*, uint\);) 266.4794 Tj
0 -370.2411 Td
-(0336 // timer.c) 65.5277 Tj
+(0336 char* strncpy\(char*, const char*, int\);) 235.8998 Tj
0 -379.7344 Td
-(0337 void timer_init\(void\);) 166.0035 Tj
+(0337 ) 21.8426 Tj
0 -389.2278 Td
-(0338 ) 21.8426 Tj
+(0338 // syscall.c) 74.2647 Tj
0 -398.7211 Td
-(0339 // trap.c) 61.1592 Tj
+(0339 int argint\(int, int*\);) 170.3721 Tj
0 -408.2145 Td
-(0340 void idtinit\(void\);) 152.898 Tj
+(0340 int argptr\(int, char**, int\);) 200.9517 Tj
0 -417.7079 Td
-(0341 extern int ticks;) 117.9499 Tj
+(0341 int argstr\(int, char**\);) 179.1091 Tj
0 -427.2012 Td
-(0342 void tvinit\(void\);) 148.5295 Tj
+(0342 int fetchint\(struct proc*, uint, int*\);) 244.6368 Tj
0 -436.6946 Td
-(0343 extern struct spinlock tickslock;) 166.0035 Tj
+(0343 int fetchstr\(struct proc*, uint, char**\);) 253.3738 Tj
0 -446.1879 Td
-(0344 ) 21.8426 Tj
+(0344 void syscall\(void\);) 152.898 Tj
0 -455.6813 Td
-(0345 // number of elements in fixed-size array) 200.9517 Tj
+(0345 ) 21.8426 Tj
0 -465.1747 Td
-(0346 #define NELEM\(x\) \(sizeof\(x\)/sizeof\(\(x\)[0]\)\)) 209.6887 Tj
+(0346 // timer.c) 65.5277 Tj
0 -474.668 Td
-(0347 ) 21.8426 Tj
+(0347 void timerinit\(void\);) 161.635 Tj
0 -484.1614 Td
(0348 ) 21.8426 Tj
0 -493.6547 Td
@@ -4547,110 +4585,105 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/x86.h Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/defs.h Page 4) 161.635 Tj
0 -28.4801 Td
-(0350 // Routines to let C code use special x86 instructions.) 262.1109 Tj
+(0350 // trap.c) 61.1592 Tj
0 -37.9735 Td
-(0351 ) 21.8426 Tj
+(0351 void idtinit\(void\);) 152.898 Tj
0 -47.4668 Td
-(0352 static inline uchar) 104.8443 Tj
+(0352 extern int ticks;) 117.9499 Tj
0 -56.9602 Td
-(0353 inb\(ushort port\)) 91.7388 Tj
+(0353 void tvinit\(void\);) 148.5295 Tj
0 -66.4535 Td
-(0354 {) 26.2111 Tj
+(0354 extern struct spinlock tickslock;) 166.0035 Tj
0 -75.9469 Td
-(0355 uchar data;) 78.6333 Tj
+(0355 ) 21.8426 Tj
0 -85.4403 Td
-(0356 ) 21.8426 Tj
+(0356 // uart.c) 61.1592 Tj
0 -94.9336 Td
-(0357 asm volatile\("in %1,%0" : "=a" \(data\) : "d" \(port\)\)\
-;) 257.7424 Tj
+(0357 void uartinit\(void\);) 157.2665 Tj
0 -104.427 Td
-(0358 return data;) 83.0018 Tj
+(0358 void uartintr\(void\);) 157.2665 Tj
0 -113.9203 Td
-(0359 }) 26.2111 Tj
+(0359 void uartputc\(int\);) 152.898 Tj
0 -123.4137 Td
(0360 ) 21.8426 Tj
0 -132.9071 Td
-(0361 static inline void) 100.4758 Tj
+(0361 // number of elements in fixed-size array) 200.9517 Tj
0 -142.4004 Td
-(0362 insl\(int port, void *addr, int cnt\)) 174.7406 Tj
+(0362 #define NELEM\(x\) \(sizeof\(x\)/sizeof\(\(x\)[0]\)\)) 209.6887 Tj
0 -151.8938 Td
-(0363 {) 26.2111 Tj
+(0363 ) 21.8426 Tj
0 -161.3871 Td
-(0364 asm volatile\("cld\\n\\trepne\\n\\tinsl" :) 209.6887 Tj
+(0364 ) 21.8426 Tj
0 -170.8805 Td
-(0365 "=D" \(addr\), "=c" \(cnt\) :) 227.1628 Tj
+(0365 ) 21.8426 Tj
0 -180.3739 Td
-(0366 "d" \(port\), "0" \(addr\), "1" \(cnt\)\
- :) 262.1109 Tj
+(0366 ) 21.8426 Tj
0 -189.8672 Td
-(0367 "memory", "cc"\);) 174.7406 Tj
+(0367 ) 21.8426 Tj
0 -199.3606 Td
-(0368 }) 26.2111 Tj
+(0368 ) 21.8426 Tj
0 -208.8539 Td
(0369 ) 21.8426 Tj
0 -218.3473 Td
-(0370 static inline void) 100.4758 Tj
+(0370 ) 21.8426 Tj
0 -227.8407 Td
-(0371 outb\(ushort port, uchar data\)) 148.5295 Tj
+(0371 ) 21.8426 Tj
0 -237.334 Td
-(0372 {) 26.2111 Tj
+(0372 ) 21.8426 Tj
0 -246.8274 Td
-(0373 asm volatile\("out %0,%1" : : "a" \(data\), "d" \(port\)\
-\);) 262.1109 Tj
+(0373 ) 21.8426 Tj
0 -256.3207 Td
-(0374 }) 26.2111 Tj
+(0374 ) 21.8426 Tj
0 -265.8141 Td
(0375 ) 21.8426 Tj
0 -275.3075 Td
-(0376 static inline void) 100.4758 Tj
+(0376 ) 21.8426 Tj
0 -284.8008 Td
-(0377 outw\(ushort port, ushort data\)) 152.898 Tj
+(0377 ) 21.8426 Tj
0 -294.2942 Td
-(0378 {) 26.2111 Tj
+(0378 ) 21.8426 Tj
0 -303.7875 Td
-(0379 asm volatile\("out %0,%1" : : "a" \(data\), "d" \(port\)\
-\);) 262.1109 Tj
+(0379 ) 21.8426 Tj
0 -313.2809 Td
-(0380 }) 26.2111 Tj
+(0380 ) 21.8426 Tj
0 -322.7743 Td
(0381 ) 21.8426 Tj
0 -332.2676 Td
-(0382 static inline void) 100.4758 Tj
+(0382 ) 21.8426 Tj
0 -341.761 Td
-(0383 outsl\(int port, const void *addr, int cnt\)) 205.3202 Tj
+(0383 ) 21.8426 Tj
0 -351.2543 Td
-(0384 {) 26.2111 Tj
+(0384 ) 21.8426 Tj
0 -360.7477 Td
-(0385 asm volatile\("cld\\n\\trepne\\n\\toutsl" :) 209.6887 Tj
+(0385 ) 21.8426 Tj
0 -370.2411 Td
-(0386 "=S" \(addr\), "=c" \(cnt\) :) 227.1628 Tj
+(0386 ) 21.8426 Tj
0 -379.7344 Td
-(0387 "d" \(port\), "0" \(addr\), "1" \(cnt\)\
- :) 262.1109 Tj
+(0387 ) 21.8426 Tj
0 -389.2278 Td
-(0388 "cc"\);) 131.0554 Tj
+(0388 ) 21.8426 Tj
0 -398.7211 Td
-(0389 }) 26.2111 Tj
+(0389 ) 21.8426 Tj
0 -408.2145 Td
(0390 ) 21.8426 Tj
0 -417.7079 Td
-(0391 static inline uint) 100.4758 Tj
+(0391 ) 21.8426 Tj
0 -427.2012 Td
-(0392 read_ebp\(void\)) 83.0018 Tj
+(0392 ) 21.8426 Tj
0 -436.6946 Td
-(0393 {) 26.2111 Tj
+(0393 ) 21.8426 Tj
0 -446.1879 Td
-(0394 uint ebp;) 69.8962 Tj
+(0394 ) 21.8426 Tj
0 -455.6813 Td
(0395 ) 21.8426 Tj
0 -465.1747 Td
-(0396 asm volatile\("movl %%ebp, %0" : "=a" \(ebp\)\);) 222.7942 Tj
+(0396 ) 21.8426 Tj
0 -474.668 Td
-(0397 return ebp;) 78.6333 Tj
+(0397 ) 21.8426 Tj
0 -484.1614 Td
-(0398 }) 26.2111 Tj
+(0398 ) 21.8426 Tj
0 -493.6547 Td
(0399 ) 21.8426 Tj
0 -522.1348 Td
@@ -4683,6 +4716,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -4700,105 +4735,108 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/x86.h Page 2) 157.2665 Tj
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0 -28.4801 Td
-(0400 struct segdesc;) 87.3703 Tj
+(0400 // Routines to let C code use special x86 instructions.) 262.1109 Tj
0 -37.9735 Td
(0401 ) 21.8426 Tj
0 -47.4668 Td
-(0402 static inline void) 100.4758 Tj
+(0402 static inline uchar) 104.8443 Tj
0 -56.9602 Td
-(0403 lgdt\(struct segdesc *p, int size\)) 166.0035 Tj
+(0403 inb\(ushort port\)) 91.7388 Tj
0 -66.4535 Td
(0404 {) 26.2111 Tj
0 -75.9469 Td
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+(0405 uchar data;) 78.6333 Tj
0 -85.4403 Td
(0406 ) 21.8426 Tj
0 -94.9336 Td
-(0407 pd[0] = size-1;) 96.1073 Tj
+(0407 asm volatile\("in %1,%0" : "=a" \(data\) : "d" \(port\)\)\
+;) 257.7424 Tj
0 -104.427 Td
-(0408 pd[1] = \(uint\)p;) 100.4758 Tj
+(0408 return data;) 83.0018 Tj
0 -113.9203 Td
-(0409 pd[2] = \(uint\)p >> 16;) 126.6869 Tj
+(0409 }) 26.2111 Tj
0 -123.4137 Td
(0410 ) 21.8426 Tj
0 -132.9071 Td
-(0411 asm volatile\("lgdt \(%0\)" : : "r" \(pd\)\);) 200.9517 Tj
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0 -142.4004 Td
-(0412 }) 26.2111 Tj
+(0412 insl\(int port, void *addr, int cnt\)) 174.7406 Tj
0 -151.8938 Td
-(0413 ) 21.8426 Tj
+(0413 {) 26.2111 Tj
0 -161.3871 Td
-(0414 struct gatedesc;) 91.7388 Tj
+(0414 asm volatile\("cld; rep insl" :) 161.635 Tj
0 -170.8805 Td
-(0415 ) 21.8426 Tj
+(0415 "=D" \(addr\), "=c" \(cnt\) :) 196.5831 Tj
0 -180.3739 Td
-(0416 static inline void) 100.4758 Tj
+(0416 "d" \(port\), "0" \(addr\), "1" \(cnt\) :) 240.2683 Tj
0 -189.8672 Td
-(0417 lidt\(struct gatedesc *p, int size\)) 170.3721 Tj
+(0417 "memory", "cc"\);) 157.2665 Tj
0 -199.3606 Td
-(0418 {) 26.2111 Tj
+(0418 }) 26.2111 Tj
0 -208.8539 Td
-(0419 volatile ushort pd[3];) 126.6869 Tj
+(0419 ) 21.8426 Tj
0 -218.3473 Td
-(0420 ) 21.8426 Tj
+(0420 static inline void) 100.4758 Tj
0 -227.8407 Td
-(0421 pd[0] = size-1;) 96.1073 Tj
+(0421 outb\(ushort port, uchar data\)) 148.5295 Tj
0 -237.334 Td
-(0422 pd[1] = \(uint\)p;) 100.4758 Tj
+(0422 {) 26.2111 Tj
0 -246.8274 Td
-(0423 pd[2] = \(uint\)p >> 16;) 126.6869 Tj
+(0423 asm volatile\("out %0,%1" : : "a" \(data\), "d" \(port\)\
+\);) 262.1109 Tj
0 -256.3207 Td
-(0424 ) 21.8426 Tj
+(0424 }) 26.2111 Tj
0 -265.8141 Td
-(0425 asm volatile\("lidt \(%0\)" : : "r" \(pd\)\);) 200.9517 Tj
+(0425 ) 21.8426 Tj
0 -275.3075 Td
-(0426 }) 26.2111 Tj
+(0426 static inline void) 100.4758 Tj
0 -284.8008 Td
-(0427 ) 21.8426 Tj
+(0427 outw\(ushort port, ushort data\)) 152.898 Tj
0 -294.2942 Td
-(0428 static inline void) 100.4758 Tj
+(0428 {) 26.2111 Tj
0 -303.7875 Td
-(0429 ltr\(ushort sel\)) 87.3703 Tj
+(0429 asm volatile\("out %0,%1" : : "a" \(data\), "d" \(port\)\
+\);) 262.1109 Tj
0 -313.2809 Td
-(0430 {) 26.2111 Tj
+(0430 }) 26.2111 Tj
0 -322.7743 Td
-(0431 asm volatile\("ltr %0" : : "r" \(sel\)\);) 192.2146 Tj
+(0431 ) 21.8426 Tj
0 -332.2676 Td
-(0432 }) 26.2111 Tj
+(0432 static inline void) 100.4758 Tj
0 -341.761 Td
-(0433 ) 21.8426 Tj
+(0433 outsl\(int port, const void *addr, int cnt\)) 205.3202 Tj
0 -351.2543 Td
-(0434 static inline uint) 100.4758 Tj
+(0434 {) 26.2111 Tj
0 -360.7477 Td
-(0435 read_eflags\(void\)) 96.1073 Tj
+(0435 asm volatile\("cld; rep outsl" :) 166.0035 Tj
0 -370.2411 Td
-(0436 {) 26.2111 Tj
+(0436 "=S" \(addr\), "=c" \(cnt\) :) 196.5831 Tj
0 -379.7344 Td
-(0437 uint eflags;) 83.0018 Tj
+(0437 "d" \(port\), "0" \(addr\), "1" \(cnt\) :) 240.2683 Tj
0 -389.2278 Td
-(0438 asm volatile\("pushfl; popl %0" : "=r" \(eflags\)\);) 240.2683 Tj
+(0438 "cc"\);) 113.5814 Tj
0 -398.7211 Td
-(0439 return eflags;) 91.7388 Tj
+(0439 }) 26.2111 Tj
0 -408.2145 Td
-(0440 }) 26.2111 Tj
+(0440 ) 21.8426 Tj
0 -417.7079 Td
-(0441 ) 21.8426 Tj
+(0441 static inline void) 100.4758 Tj
0 -427.2012 Td
-(0442 static inline void) 100.4758 Tj
+(0442 stosb\(void *addr, int data, int cnt\)) 179.1091 Tj
0 -436.6946 Td
-(0443 write_eflags\(uint eflags\)) 131.0554 Tj
+(0443 {) 26.2111 Tj
0 -446.1879 Td
-(0444 {) 26.2111 Tj
+(0444 asm volatile\("cld; rep stosb" :) 166.0035 Tj
0 -455.6813 Td
-(0445 asm volatile\("pushl %0; popfl" : : "r" \(eflags\)\);) 244.6368 Tj
+(0445 "=D" \(addr\), "=c" \(cnt\) :) 196.5831 Tj
0 -465.1747 Td
-(0446 }) 26.2111 Tj
+(0446 "0" \(addr\), "1" \(cnt\), "a" \(data\) :) 240.2683 Tj
0 -474.668 Td
-(0447 ) 21.8426 Tj
+(0447 "memory", "cc"\);) 157.2665 Tj
0 -484.1614 Td
-(0448 ) 21.8426 Tj
+(0448 }) 26.2111 Tj
0 -493.6547 Td
(0449 ) 21.8426 Tj
0 -522.1348 Td
@@ -4819,107 +4857,107 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/x86.h Page 3) 157.2665 Tj
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0 -28.4801 Td
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0 -37.9735 Td
-(0451 xchg\(volatile uint *addr, uint newval\)) 187.8461 Tj
+(0451 ) 21.8426 Tj
0 -47.4668 Td
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0 -56.9602 Td
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0 -66.4535 Td
-(0454 ) 21.8426 Tj
+(0454 {) 26.2111 Tj
0 -75.9469 Td
-(0455 // The + in "+m" denotes a read-modify-write operand.) 262.1109 Tj
+(0455 volatile ushort pd[3];) 126.6869 Tj
0 -85.4403 Td
-(0456 asm volatile\("lock; xchgl %0, %1" :) 183.4776 Tj
+(0456 ) 21.8426 Tj
0 -94.9336 Td
-(0457 "+m" \(*addr\), "=a" \(result\) :) 214.0572 Tj
+(0457 pd[0] = size-1;) 96.1073 Tj
0 -104.427 Td
-(0458 "1" \(newval\) :) 148.5295 Tj
+(0458 pd[1] = \(uint\)p;) 100.4758 Tj
0 -113.9203 Td
-(0459 "cc"\);) 113.5814 Tj
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0 -123.4137 Td
-(0460 return result;) 91.7388 Tj
+(0460 ) 21.8426 Tj
0 -132.9071 Td
-(0461 }) 26.2111 Tj
+(0461 asm volatile\("lgdt \(%0\)" : : "r" \(pd\)\);) 200.9517 Tj
0 -142.4004 Td
-(0462 ) 21.8426 Tj
+(0462 }) 26.2111 Tj
0 -151.8938 Td
-(0463 static inline void) 100.4758 Tj
+(0463 ) 21.8426 Tj
0 -161.3871 Td
-(0464 cli\(void\)) 61.1592 Tj
+(0464 struct gatedesc;) 91.7388 Tj
0 -170.8805 Td
-(0465 {) 26.2111 Tj
+(0465 ) 21.8426 Tj
0 -180.3739 Td
-(0466 asm volatile\("cli"\);) 117.9499 Tj
+(0466 static inline void) 100.4758 Tj
0 -189.8672 Td
-(0467 }) 26.2111 Tj
+(0467 lidt\(struct gatedesc *p, int size\)) 170.3721 Tj
0 -199.3606 Td
-(0468 ) 21.8426 Tj
+(0468 {) 26.2111 Tj
0 -208.8539 Td
-(0469 static inline void) 100.4758 Tj
+(0469 volatile ushort pd[3];) 126.6869 Tj
0 -218.3473 Td
-(0470 sti\(void\)) 61.1592 Tj
+(0470 ) 21.8426 Tj
0 -227.8407 Td
-(0471 {) 26.2111 Tj
+(0471 pd[0] = size-1;) 96.1073 Tj
0 -237.334 Td
-(0472 asm volatile\("sti"\);) 117.9499 Tj
+(0472 pd[1] = \(uint\)p;) 100.4758 Tj
0 -246.8274 Td
-(0473 }) 26.2111 Tj
+(0473 pd[2] = \(uint\)p >> 16;) 126.6869 Tj
0 -256.3207 Td
(0474 ) 21.8426 Tj
0 -265.8141 Td
-(0475 // Layout of the trap frame built on the stack by the) 253.3738 Tj
+(0475 asm volatile\("lidt \(%0\)" : : "r" \(pd\)\);) 200.9517 Tj
0 -275.3075 Td
-(0476 // hardware and by trapasm.S, and passed to trap\(\).) 244.6368 Tj
+(0476 }) 26.2111 Tj
0 -284.8008 Td
-(0477 struct trapframe {) 100.4758 Tj
+(0477 ) 21.8426 Tj
0 -294.2942 Td
-(0478 // registers as pushed by pusha) 166.0035 Tj
+(0478 static inline void) 100.4758 Tj
0 -303.7875 Td
-(0479 uint edi;) 69.8962 Tj
+(0479 ltr\(ushort sel\)) 87.3703 Tj
0 -313.2809 Td
-(0480 uint esi;) 69.8962 Tj
+(0480 {) 26.2111 Tj
0 -322.7743 Td
-(0481 uint ebp;) 69.8962 Tj
+(0481 asm volatile\("ltr %0" : : "r" \(sel\)\);) 192.2146 Tj
0 -332.2676 Td
-(0482 uint oesp; // useless & ignored) 187.8461 Tj
+(0482 }) 26.2111 Tj
0 -341.761 Td
-(0483 uint ebx;) 69.8962 Tj
+(0483 ) 21.8426 Tj
0 -351.2543 Td
-(0484 uint edx;) 69.8962 Tj
+(0484 static inline uint) 100.4758 Tj
0 -360.7477 Td
-(0485 uint ecx;) 69.8962 Tj
+(0485 readeflags\(void\)) 91.7388 Tj
0 -370.2411 Td
-(0486 uint eax;) 69.8962 Tj
+(0486 {) 26.2111 Tj
0 -379.7344 Td
-(0487 ) 21.8426 Tj
+(0487 uint eflags;) 83.0018 Tj
0 -389.2278 Td
-(0488 // rest of trap frame) 122.3184 Tj
+(0488 asm volatile\("pushfl; popl %0" : "=r" \(eflags\)\);) 240.2683 Tj
0 -398.7211 Td
-(0489 ushort es;) 74.2647 Tj
+(0489 return eflags;) 91.7388 Tj
0 -408.2145 Td
-(0490 ushort padding1;) 100.4758 Tj
+(0490 }) 26.2111 Tj
0 -417.7079 Td
-(0491 ushort ds;) 74.2647 Tj
+(0491 ) 21.8426 Tj
0 -427.2012 Td
-(0492 ushort padding2;) 100.4758 Tj
+(0492 ) 21.8426 Tj
0 -436.6946 Td
-(0493 uint trapno;) 83.0018 Tj
+(0493 ) 21.8426 Tj
0 -446.1879 Td
(0494 ) 21.8426 Tj
0 -455.6813 Td
-(0495 // below here defined by x86 hardware) 192.2146 Tj
+(0495 ) 21.8426 Tj
0 -465.1747 Td
-(0496 uint err;) 69.8962 Tj
+(0496 ) 21.8426 Tj
0 -474.668 Td
-(0497 uint eip;) 69.8962 Tj
+(0497 ) 21.8426 Tj
0 -484.1614 Td
-(0498 ushort cs;) 74.2647 Tj
+(0498 ) 21.8426 Tj
0 -493.6547 Td
-(0499 ushort padding3;) 100.4758 Tj
+(0499 ) 21.8426 Tj
0 -522.1348 Td
(Sheet 04) 34.9481 Tj
Q
@@ -4950,6 +4988,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -4967,70 +5007,69 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/x86.h Page 4) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/x86.h Page 3) 157.2665 Tj
0 -28.4801 Td
-(0500 uint eflags;) 83.0018 Tj
+(0500 static inline uint) 100.4758 Tj
0 -37.9735 Td
-(0501 ) 21.8426 Tj
+(0501 xchg\(volatile uint *addr, uint newval\)) 187.8461 Tj
0 -47.4668 Td
-(0502 // below here only when crossing rings, such as from use\
-r to kernel) 323.2701 Tj
+(0502 {) 26.2111 Tj
0 -56.9602 Td
-(0503 uint esp;) 69.8962 Tj
+(0503 uint result;) 83.0018 Tj
0 -66.4535 Td
-(0504 ushort ss;) 74.2647 Tj
+(0504 ) 21.8426 Tj
0 -75.9469 Td
-(0505 ushort padding4;) 100.4758 Tj
+(0505 // The + in "+m" denotes a read-modify-write operand.) 262.1109 Tj
0 -85.4403 Td
-(0506 };) 30.5796 Tj
+(0506 asm volatile\("lock; xchgl %0, %1" :) 183.4776 Tj
0 -94.9336 Td
-(0507 ) 21.8426 Tj
+(0507 "+m" \(*addr\), "=a" \(result\) :) 214.0572 Tj
0 -104.427 Td
-(0508 ) 21.8426 Tj
+(0508 "1" \(newval\) :) 148.5295 Tj
0 -113.9203 Td
-(0509 ) 21.8426 Tj
+(0509 "cc"\);) 113.5814 Tj
0 -123.4137 Td
-(0510 ) 21.8426 Tj
+(0510 return result;) 91.7388 Tj
0 -132.9071 Td
-(0511 ) 21.8426 Tj
+(0511 }) 26.2111 Tj
0 -142.4004 Td
(0512 ) 21.8426 Tj
0 -151.8938 Td
-(0513 ) 21.8426 Tj
+(0513 static inline void) 100.4758 Tj
0 -161.3871 Td
-(0514 ) 21.8426 Tj
+(0514 loadfsgs\(ushort v\)) 100.4758 Tj
0 -170.8805 Td
-(0515 ) 21.8426 Tj
+(0515 {) 26.2111 Tj
0 -180.3739 Td
-(0516 ) 21.8426 Tj
+(0516 asm volatile\("movw %0, %%fs" : : "r" \(v\)\);) 214.0572 Tj
0 -189.8672 Td
-(0517 ) 21.8426 Tj
+(0517 asm volatile\("movw %0, %%gs" : : "r" \(v\)\);) 214.0572 Tj
0 -199.3606 Td
-(0518 ) 21.8426 Tj
+(0518 }) 26.2111 Tj
0 -208.8539 Td
(0519 ) 21.8426 Tj
0 -218.3473 Td
-(0520 ) 21.8426 Tj
+(0520 static inline void) 100.4758 Tj
0 -227.8407 Td
-(0521 ) 21.8426 Tj
+(0521 cli\(void\)) 61.1592 Tj
0 -237.334 Td
-(0522 ) 21.8426 Tj
+(0522 {) 26.2111 Tj
0 -246.8274 Td
-(0523 ) 21.8426 Tj
+(0523 asm volatile\("cli"\);) 117.9499 Tj
0 -256.3207 Td
-(0524 ) 21.8426 Tj
+(0524 }) 26.2111 Tj
0 -265.8141 Td
(0525 ) 21.8426 Tj
0 -275.3075 Td
-(0526 ) 21.8426 Tj
+(0526 static inline void) 100.4758 Tj
0 -284.8008 Td
-(0527 ) 21.8426 Tj
+(0527 sti\(void\)) 61.1592 Tj
0 -294.2942 Td
-(0528 ) 21.8426 Tj
+(0528 {) 26.2111 Tj
0 -303.7875 Td
-(0529 ) 21.8426 Tj
+(0529 asm volatile\("sti"\);) 117.9499 Tj
0 -313.2809 Td
-(0530 ) 21.8426 Tj
+(0530 }) 26.2111 Tj
0 -322.7743 Td
(0531 ) 21.8426 Tj
0 -332.2676 Td
@@ -5087,89 +5126,80 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/asm.h Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/x86.h Page 4) 157.2665 Tj
0 -28.4801 Td
-(0550 //) 30.5796 Tj
+(0550 // Layout of the trap frame built on the stack by the) 253.3738 Tj
0 -37.9735 Td
-(0551 // assembler macros to create x86 segments) 205.3202 Tj
+(0551 // hardware and by trapasm.S, and passed to trap\(\).) 244.6368 Tj
0 -47.4668 Td
-(0552 //) 30.5796 Tj
+(0552 struct trapframe {) 100.4758 Tj
0 -56.9602 Td
-(0553 ) 21.8426 Tj
+(0553 // registers as pushed by pusha) 166.0035 Tj
0 -66.4535 Td
-(0554 #define SEG_NULLASM \
- \\) 305.796 Tj
+(0554 uint edi;) 69.8962 Tj
0 -75.9469 Td
-(0555 .word 0, 0; \
- \\) 305.796 Tj
+(0555 uint esi;) 69.8962 Tj
0 -85.4403 Td
-(0556 .byte 0, 0, 0, 0) 126.6869 Tj
+(0556 uint ebp;) 69.8962 Tj
0 -94.9336 Td
-(0557 ) 21.8426 Tj
+(0557 uint oesp; // useless & ignored) 187.8461 Tj
0 -104.427 Td
-(0558 #define SEG_ASM\(type,base,lim\) \
- \\) 305.796 Tj
+(0558 uint ebx;) 69.8962 Tj
0 -113.9203 Td
-(0559 .word \(\(\(lim\) >> 12\) & 0xffff\), \(\(base\) &\
- 0xffff\); \\) 305.796 Tj
+(0559 uint edx;) 69.8962 Tj
0 -123.4137 Td
-(0560 .byte \(\(\(base\) >> 16\) & 0xff\), \(0x90 | \(ty\
-pe\)\), \\) 305.796 Tj
+(0560 uint ecx;) 69.8962 Tj
0 -132.9071 Td
-(0561 \(0xC0 | \(\(\(lim\) >> 28\) & 0xf\)\), \(\
-\(\(base\) >> 24\) & 0xff\)) 332.0071 Tj
+(0561 uint eax;) 69.8962 Tj
0 -142.4004 Td
(0562 ) 21.8426 Tj
0 -151.8938 Td
-(0563 #define STA_X 0x8 // Executable segment) 235.8998 Tj
+(0563 // rest of trap frame) 122.3184 Tj
0 -161.3871 Td
-(0564 #define STA_E 0x4 // Expand down \(non-executabl\
-e segments\)) 318.9016 Tj
+(0564 ushort gs;) 74.2647 Tj
0 -170.8805 Td
-(0565 #define STA_C 0x4 // Conforming code segment \(e\
-xecutable only\)) 336.3756 Tj
+(0565 ushort padding1;) 100.4758 Tj
0 -180.3739 Td
-(0566 #define STA_W 0x2 // Writeable \(non-executable \
-segments\)) 310.1645 Tj
+(0566 ushort fs;) 74.2647 Tj
0 -189.8672 Td
-(0567 #define STA_R 0x2 // Readable \(executable segme\
-nts\)) 288.322 Tj
+(0567 ushort padding2;) 100.4758 Tj
0 -199.3606 Td
-(0568 #define STA_A 0x1 // Accessed) 192.2146 Tj
+(0568 ushort es;) 74.2647 Tj
0 -208.8539 Td
-(0569 ) 21.8426 Tj
+(0569 ushort padding3;) 100.4758 Tj
0 -218.3473 Td
-(0570 ) 21.8426 Tj
+(0570 ushort ds;) 74.2647 Tj
0 -227.8407 Td
-(0571 ) 21.8426 Tj
+(0571 ushort padding4;) 100.4758 Tj
0 -237.334 Td
-(0572 ) 21.8426 Tj
+(0572 uint trapno;) 83.0018 Tj
0 -246.8274 Td
(0573 ) 21.8426 Tj
0 -256.3207 Td
-(0574 ) 21.8426 Tj
+(0574 // below here defined by x86 hardware) 192.2146 Tj
0 -265.8141 Td
-(0575 ) 21.8426 Tj
+(0575 uint err;) 69.8962 Tj
0 -275.3075 Td
-(0576 ) 21.8426 Tj
+(0576 uint eip;) 69.8962 Tj
0 -284.8008 Td
-(0577 ) 21.8426 Tj
+(0577 ushort cs;) 74.2647 Tj
0 -294.2942 Td
-(0578 ) 21.8426 Tj
+(0578 ushort padding5;) 100.4758 Tj
0 -303.7875 Td
-(0579 ) 21.8426 Tj
+(0579 uint eflags;) 83.0018 Tj
0 -313.2809 Td
(0580 ) 21.8426 Tj
0 -322.7743 Td
-(0581 ) 21.8426 Tj
+(0581 // below here only when crossing rings, such as from use\
+r to kernel) 323.2701 Tj
0 -332.2676 Td
-(0582 ) 21.8426 Tj
+(0582 uint esp;) 69.8962 Tj
0 -341.761 Td
-(0583 ) 21.8426 Tj
+(0583 ushort ss;) 74.2647 Tj
0 -351.2543 Td
-(0584 ) 21.8426 Tj
+(0584 ushort padding6;) 100.4758 Tj
0 -360.7477 Td
-(0585 ) 21.8426 Tj
+(0585 };) 30.5796 Tj
0 -370.2411 Td
(0586 ) 21.8426 Tj
0 -379.7344 Td
@@ -5228,6 +5258,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -5245,103 +5277,101 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/mmu.h Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/asm.h Page 1) 157.2665 Tj
0 -28.4801 Td
-(0600 // This file contains definitions for the) 200.9517 Tj
+(0600 //) 30.5796 Tj
0 -37.9735 Td
-(0601 // x86 memory management unit \(MMU\).) 179.1091 Tj
+(0601 // assembler macros to create x86 segments) 205.3202 Tj
0 -47.4668 Td
-(0602 ) 21.8426 Tj
+(0602 //) 30.5796 Tj
0 -56.9602 Td
-(0603 // Eflags register) 100.4758 Tj
+(0603 ) 21.8426 Tj
0 -66.4535 Td
-(0604 #define FL_CF 0x00000001 // Carry Flag) 253.3738 Tj
+(0604 #define SEG_NULLASM \
+ \\) 305.796 Tj
0 -75.9469 Td
-(0605 #define FL_PF 0x00000004 // Parity Flag) 257.7424 Tj
+(0605 .word 0, 0; \
+ \\) 305.796 Tj
0 -85.4403 Td
-(0606 #define FL_AF 0x00000010 // Auxiliary carry\
- Flag) 297.059 Tj
+(0606 .byte 0, 0, 0, 0) 126.6869 Tj
0 -94.9336 Td
-(0607 #define FL_ZF 0x00000040 // Zero Flag) 249.0053 Tj
+(0607 ) 21.8426 Tj
0 -104.427 Td
-(0608 #define FL_SF 0x00000080 // Sign Flag) 249.0053 Tj
+(0608 #define SEG_ASM\(type,base,lim\) \
+ \\) 305.796 Tj
0 -113.9203 Td
-(0609 #define FL_TF 0x00000100 // Trap Flag) 249.0053 Tj
+(0609 .word \(\(\(lim\) >> 12\) & 0xffff\), \(\(base\) &\
+ 0xffff\); \\) 305.796 Tj
0 -123.4137 Td
-(0610 #define FL_IF 0x00000200 // Interrupt Enabl\
-e) 279.5849 Tj
+(0610 .byte \(\(\(base\) >> 16\) & 0xff\), \(0x90 | \(ty\
+pe\)\), \\) 305.796 Tj
0 -132.9071 Td
-(0611 #define FL_DF 0x00000400 // Direction Flag) 270.8479 Tj
+(0611 \(0xC0 | \(\(\(lim\) >> 28\) & 0xf\)\), \(\
+\(\(base\) >> 24\) & 0xff\)) 332.0071 Tj
0 -142.4004 Td
-(0612 #define FL_OF 0x00000800 // Overflow Flag) 266.4794 Tj
+(0612 ) 21.8426 Tj
0 -151.8938 Td
-(0613 #define FL_IOPL_MASK 0x00003000 // I/O Privilege L\
-evel bitmask) 327.6386 Tj
+(0613 #define STA_X 0x8 // Executable segment) 235.8998 Tj
0 -161.3871 Td
-(0614 #define FL_IOPL_0 0x00000000 // IOPL == 0) 257.7424 Tj
+(0614 #define STA_E 0x4 // Expand down \(non-executabl\
+e segments\)) 318.9016 Tj
0 -170.8805 Td
-(0615 #define FL_IOPL_1 0x00001000 // IOPL == 1) 257.7424 Tj
+(0615 #define STA_C 0x4 // Conforming code segment \(e\
+xecutable only\)) 336.3756 Tj
0 -180.3739 Td
-(0616 #define FL_IOPL_2 0x00002000 // IOPL == 2) 257.7424 Tj
+(0616 #define STA_W 0x2 // Writeable \(non-executable \
+segments\)) 310.1645 Tj
0 -189.8672 Td
-(0617 #define FL_IOPL_3 0x00003000 // IOPL == 3) 257.7424 Tj
+(0617 #define STA_R 0x2 // Readable \(executable segme\
+nts\)) 288.322 Tj
0 -199.3606 Td
-(0618 #define FL_NT 0x00004000 // Nested Task) 257.7424 Tj
+(0618 #define STA_A 0x1 // Accessed) 192.2146 Tj
0 -208.8539 Td
-(0619 #define FL_RF 0x00010000 // Resume Flag) 257.7424 Tj
+(0619 ) 21.8426 Tj
0 -218.3473 Td
-(0620 #define FL_VM 0x00020000 // Virtual 8086 mo\
-de) 283.9534 Tj
+(0620 ) 21.8426 Tj
0 -227.8407 Td
-(0621 #define FL_AC 0x00040000 // Alignment Check) 275.2164 Tj
+(0621 ) 21.8426 Tj
0 -237.334 Td
-(0622 #define FL_VIF 0x00080000 // Virtual Interru\
-pt Flag) 305.796 Tj
+(0622 ) 21.8426 Tj
0 -246.8274 Td
-(0623 #define FL_VIP 0x00100000 // Virtual Interru\
-pt Pending) 318.9016 Tj
+(0623 ) 21.8426 Tj
0 -256.3207 Td
-(0624 #define FL_ID 0x00200000 // ID flag) 240.2683 Tj
+(0624 ) 21.8426 Tj
0 -265.8141 Td
(0625 ) 21.8426 Tj
0 -275.3075 Td
-(0626 // Segment Descriptor) 113.5814 Tj
+(0626 ) 21.8426 Tj
0 -284.8008 Td
-(0627 struct segdesc {) 91.7388 Tj
+(0627 ) 21.8426 Tj
0 -294.2942 Td
-(0628 uint lim_15_0 : 16; // Low bits of segment limit) 244.6368 Tj
+(0628 ) 21.8426 Tj
0 -303.7875 Td
-(0629 uint base_15_0 : 16; // Low bits of segment base address) 275.2164 Tj
+(0629 ) 21.8426 Tj
0 -313.2809 Td
-(0630 uint base_23_16 : 8; // Middle bits of segment base addr\
-ess) 288.322 Tj
+(0630 ) 21.8426 Tj
0 -322.7743 Td
-(0631 uint type : 4; // Segment type \(see STS_ constant\
-s\)) 279.5849 Tj
+(0631 ) 21.8426 Tj
0 -332.2676 Td
-(0632 uint s : 1; // 0 = system, 1 = application) 253.3738 Tj
+(0632 ) 21.8426 Tj
0 -341.761 Td
-(0633 uint dpl : 2; // Descriptor Privilege Level) 249.0053 Tj
+(0633 ) 21.8426 Tj
0 -351.2543 Td
-(0634 uint p : 1; // Present) 166.0035 Tj
+(0634 ) 21.8426 Tj
0 -360.7477 Td
-(0635 uint lim_19_16 : 4; // High bits of segment limit) 249.0053 Tj
+(0635 ) 21.8426 Tj
0 -370.2411 Td
-(0636 uint avl : 1; // Unused \(available for software \
-use\)) 288.322 Tj
+(0636 ) 21.8426 Tj
0 -379.7344 Td
-(0637 uint rsv1 : 1; // Reserved) 170.3721 Tj
+(0637 ) 21.8426 Tj
0 -389.2278 Td
-(0638 uint db : 1; // 0 = 16-bit segment, 1 = 32-bit s\
-egment) 301.4275 Tj
+(0638 ) 21.8426 Tj
0 -398.7211 Td
-(0639 uint g : 1; // Granularity: limit scaled by 4K \
-when set) 310.1645 Tj
+(0639 ) 21.8426 Tj
0 -408.2145 Td
-(0640 uint base_31_24 : 8; // High bits of segment base addres\
-s) 279.5849 Tj
+(0640 ) 21.8426 Tj
0 -417.7079 Td
-(0641 };) 30.5796 Tj
+(0641 ) 21.8426 Tj
0 -427.2012 Td
(0642 ) 21.8426 Tj
0 -436.6946 Td
@@ -5376,103 +5406,103 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/mmu.h Page 2) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/mmu.h Page 1) 157.2665 Tj
0 -28.4801 Td
-(0650 // Null segment) 87.3703 Tj
+(0650 // This file contains definitions for the) 200.9517 Tj
0 -37.9735 Td
-(0651 #define SEG_NULL \(struct segdesc\){ 0,0,0,0,0,0,0,\
-0,0,0,0,0,0 }) 323.2701 Tj
+(0651 // x86 memory management unit \(MMU\).) 179.1091 Tj
0 -47.4668 Td
(0652 ) 21.8426 Tj
0 -56.9602 Td
-(0653 // Normal segment) 96.1073 Tj
+(0653 // Eflags register) 100.4758 Tj
0 -66.4535 Td
-(0654 #define SEG\(type, base, lim, dpl\) \(struct segdesc\) \
- \\) 340.7441 Tj
+(0654 #define FL_CF 0x00000001 // Carry Flag) 253.3738 Tj
0 -75.9469 Td
-(0655 { \(\(lim\) >> 12\) & 0xffff, \(base\) & 0xffff, \(\(base\)\
- >> 16\) & 0xff, \\) 340.7441 Tj
+(0655 #define FL_PF 0x00000004 // Parity Flag) 257.7424 Tj
0 -85.4403 Td
-(0656 type, 1, dpl, 1, \(uint\) \(lim\) >> 28, 0, 0, 1, 1, \
- \\) 340.7441 Tj
+(0656 #define FL_AF 0x00000010 // Auxiliary carry\
+ Flag) 297.059 Tj
0 -94.9336 Td
-(0657 \(uint\) \(base\) >> 24 }) 131.0554 Tj
+(0657 #define FL_ZF 0x00000040 // Zero Flag) 249.0053 Tj
0 -104.427 Td
-(0658 ) 21.8426 Tj
+(0658 #define FL_SF 0x00000080 // Sign Flag) 249.0053 Tj
0 -113.9203 Td
-(0659 #define SEG16\(type, base, lim, dpl\) \(struct segdesc\) \
- \\) 340.7441 Tj
+(0659 #define FL_TF 0x00000100 // Trap Flag) 249.0053 Tj
0 -123.4137 Td
-(0660 { \(lim\) & 0xffff, \(base\) & 0xffff, \(\(base\) >> 16\) \
-& 0xff, \\) 340.7441 Tj
+(0660 #define FL_IF 0x00000200 // Interrupt Enabl\
+e) 279.5849 Tj
0 -132.9071 Td
-(0661 type, 1, dpl, 1, \(uint\) \(lim\) >> 16, 0, 0, 1, 0, \
- \\) 340.7441 Tj
+(0661 #define FL_DF 0x00000400 // Direction Flag) 270.8479 Tj
0 -142.4004 Td
-(0662 \(uint\) \(base\) >> 24 }) 131.0554 Tj
+(0662 #define FL_OF 0x00000800 // Overflow Flag) 266.4794 Tj
0 -151.8938 Td
-(0663 ) 21.8426 Tj
+(0663 #define FL_IOPL_MASK 0x00003000 // I/O Privilege L\
+evel bitmask) 327.6386 Tj
0 -161.3871 Td
-(0664 #define DPL_USER 0x3 // User DPL) 192.2146 Tj
+(0664 #define FL_IOPL_0 0x00000000 // IOPL == 0) 257.7424 Tj
0 -170.8805 Td
-(0665 ) 21.8426 Tj
+(0665 #define FL_IOPL_1 0x00001000 // IOPL == 1) 257.7424 Tj
0 -180.3739 Td
-(0666 // Application segment type bits) 161.635 Tj
+(0666 #define FL_IOPL_2 0x00002000 // IOPL == 2) 257.7424 Tj
0 -189.8672 Td
-(0667 #define STA_X 0x8 // Executable segment) 235.8998 Tj
+(0667 #define FL_IOPL_3 0x00003000 // IOPL == 3) 257.7424 Tj
0 -199.3606 Td
-(0668 #define STA_E 0x4 // Expand down \(non-executabl\
-e segments\)) 318.9016 Tj
+(0668 #define FL_NT 0x00004000 // Nested Task) 257.7424 Tj
0 -208.8539 Td
-(0669 #define STA_C 0x4 // Conforming code segment \(e\
-xecutable only\)) 336.3756 Tj
+(0669 #define FL_RF 0x00010000 // Resume Flag) 257.7424 Tj
0 -218.3473 Td
-(0670 #define STA_W 0x2 // Writeable \(non-executable \
-segments\)) 310.1645 Tj
+(0670 #define FL_VM 0x00020000 // Virtual 8086 mo\
+de) 283.9534 Tj
0 -227.8407 Td
-(0671 #define STA_R 0x2 // Readable \(executable segme\
-nts\)) 288.322 Tj
+(0671 #define FL_AC 0x00040000 // Alignment Check) 275.2164 Tj
0 -237.334 Td
-(0672 #define STA_A 0x1 // Accessed) 192.2146 Tj
+(0672 #define FL_VIF 0x00080000 // Virtual Interru\
+pt Flag) 305.796 Tj
0 -246.8274 Td
-(0673 ) 21.8426 Tj
+(0673 #define FL_VIP 0x00100000 // Virtual Interru\
+pt Pending) 318.9016 Tj
0 -256.3207 Td
-(0674 // System segment type bits) 139.7925 Tj
+(0674 #define FL_ID 0x00200000 // ID flag) 240.2683 Tj
0 -265.8141 Td
-(0675 #define STS_T16A 0x1 // Available 16-bit TSS) 244.6368 Tj
+(0675 ) 21.8426 Tj
0 -275.3075 Td
-(0676 #define STS_LDT 0x2 // Local Descriptor Table) 253.3738 Tj
+(0676 // Segment Descriptor) 113.5814 Tj
0 -284.8008 Td
-(0677 #define STS_T16B 0x3 // Busy 16-bit TSS) 222.7942 Tj
+(0677 struct segdesc {) 91.7388 Tj
0 -294.2942 Td
-(0678 #define STS_CG16 0x4 // 16-bit Call Gate) 227.1628 Tj
+(0678 uint lim_15_0 : 16; // Low bits of segment limit) 244.6368 Tj
0 -303.7875 Td
-(0679 #define STS_TG 0x5 // Task Gate / Coum Transmitio\
-ns) 283.9534 Tj
+(0679 uint base_15_0 : 16; // Low bits of segment base address) 275.2164 Tj
0 -313.2809 Td
-(0680 #define STS_IG16 0x6 // 16-bit Interrupt Gate) 249.0053 Tj
+(0680 uint base_23_16 : 8; // Middle bits of segment base addr\
+ess) 288.322 Tj
0 -322.7743 Td
-(0681 #define STS_TG16 0x7 // 16-bit Trap Gate) 227.1628 Tj
+(0681 uint type : 4; // Segment type \(see STS_ constant\
+s\)) 279.5849 Tj
0 -332.2676 Td
-(0682 #define STS_T32A 0x9 // Available 32-bit TSS) 244.6368 Tj
+(0682 uint s : 1; // 0 = system, 1 = application) 253.3738 Tj
0 -341.761 Td
-(0683 #define STS_T32B 0xB // Busy 32-bit TSS) 222.7942 Tj
+(0683 uint dpl : 2; // Descriptor Privilege Level) 249.0053 Tj
0 -351.2543 Td
-(0684 #define STS_CG32 0xC // 32-bit Call Gate) 227.1628 Tj
+(0684 uint p : 1; // Present) 166.0035 Tj
0 -360.7477 Td
-(0685 #define STS_IG32 0xE // 32-bit Interrupt Gate) 249.0053 Tj
+(0685 uint lim_19_16 : 4; // High bits of segment limit) 249.0053 Tj
0 -370.2411 Td
-(0686 #define STS_TG32 0xF // 32-bit Trap Gate) 227.1628 Tj
+(0686 uint avl : 1; // Unused \(available for software \
+use\)) 288.322 Tj
0 -379.7344 Td
-(0687 ) 21.8426 Tj
+(0687 uint rsv1 : 1; // Reserved) 170.3721 Tj
0 -389.2278 Td
-(0688 ) 21.8426 Tj
+(0688 uint db : 1; // 0 = 16-bit segment, 1 = 32-bit s\
+egment) 301.4275 Tj
0 -398.7211 Td
-(0689 ) 21.8426 Tj
+(0689 uint g : 1; // Granularity: limit scaled by 4K \
+when set) 310.1645 Tj
0 -408.2145 Td
-(0690 ) 21.8426 Tj
+(0690 uint base_31_24 : 8; // High bits of segment base addres\
+s) 279.5849 Tj
0 -417.7079 Td
-(0691 ) 21.8426 Tj
+(0691 };) 30.5796 Tj
0 -427.2012 Td
(0692 ) 21.8426 Tj
0 -436.6946 Td
@@ -5519,6 +5549,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -5536,90 +5568,98 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/mmu.h Page 3) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/mmu.h Page 2) 157.2665 Tj
0 -28.4801 Td
-(0700 // Task state segment format) 144.161 Tj
+(0700 // Normal segment) 96.1073 Tj
0 -37.9735 Td
-(0701 struct taskstate {) 100.4758 Tj
+(0701 #define SEG\(type, base, lim, dpl\) \(struct segdesc\) \
+ \\) 340.7441 Tj
0 -47.4668 Td
-(0702 uint link; // Old ts selector) 192.2146 Tj
+(0702 { \(\(lim\) >> 12\) & 0xffff, \(base\) & 0xffff, \(\(base\)\
+ >> 16\) & 0xff, \\) 340.7441 Tj
0 -56.9602 Td
-(0703 uint esp0; // Stack pointers and segment selecto\
-rs) 283.9534 Tj
+(0703 type, 1, dpl, 1, \(uint\) \(lim\) >> 28, 0, 0, 1, 1, \
+ \\) 340.7441 Tj
0 -66.4535 Td
-(0704 ushort ss0; // after an increase in privilege l\
-evel) 292.6905 Tj
+(0704 \(uint\) \(base\) >> 24 }) 131.0554 Tj
0 -75.9469 Td
-(0705 ushort padding1;) 100.4758 Tj
+(0705 ) 21.8426 Tj
0 -85.4403 Td
-(0706 uint *esp1;) 78.6333 Tj
+(0706 #define SEG16\(type, base, lim, dpl\) \(struct segdesc\) \
+ \\) 340.7441 Tj
0 -94.9336 Td
-(0707 ushort ss1;) 78.6333 Tj
+(0707 { \(lim\) & 0xffff, \(base\) & 0xffff, \(\(base\) >> 16\) \
+& 0xff, \\) 340.7441 Tj
0 -104.427 Td
-(0708 ushort padding2;) 100.4758 Tj
+(0708 type, 1, dpl, 1, \(uint\) \(lim\) >> 16, 0, 0, 1, 0, \
+ \\) 340.7441 Tj
0 -113.9203 Td
-(0709 uint *esp2;) 78.6333 Tj
+(0709 \(uint\) \(base\) >> 24 }) 131.0554 Tj
0 -123.4137 Td
-(0710 ushort ss2;) 78.6333 Tj
+(0710 ) 21.8426 Tj
0 -132.9071 Td
-(0711 ushort padding3;) 100.4758 Tj
+(0711 #define DPL_USER 0x3 // User DPL) 192.2146 Tj
0 -142.4004 Td
-(0712 void *cr3; // Page directory base) 209.6887 Tj
+(0712 ) 21.8426 Tj
0 -151.8938 Td
-(0713 uint *eip; // Saved state from last task switch) 270.8479 Tj
+(0713 // Application segment type bits) 161.635 Tj
0 -161.3871 Td
-(0714 uint eflags;) 83.0018 Tj
+(0714 #define STA_X 0x8 // Executable segment) 235.8998 Tj
0 -170.8805 Td
-(0715 uint eax; // More saved state \(registers\)) 249.0053 Tj
+(0715 #define STA_E 0x4 // Expand down \(non-executabl\
+e segments\)) 318.9016 Tj
0 -180.3739 Td
-(0716 uint ecx;) 69.8962 Tj
+(0716 #define STA_C 0x4 // Conforming code segment \(e\
+xecutable only\)) 336.3756 Tj
0 -189.8672 Td
-(0717 uint edx;) 69.8962 Tj
+(0717 #define STA_W 0x2 // Writeable \(non-executable \
+segments\)) 310.1645 Tj
0 -199.3606 Td
-(0718 uint ebx;) 69.8962 Tj
+(0718 #define STA_R 0x2 // Readable \(executable segme\
+nts\)) 288.322 Tj
0 -208.8539 Td
-(0719 uint *esp;) 74.2647 Tj
+(0719 #define STA_A 0x1 // Accessed) 192.2146 Tj
0 -218.3473 Td
-(0720 uint *ebp;) 74.2647 Tj
+(0720 ) 21.8426 Tj
0 -227.8407 Td
-(0721 uint esi;) 69.8962 Tj
+(0721 // System segment type bits) 139.7925 Tj
0 -237.334 Td
-(0722 uint edi;) 69.8962 Tj
+(0722 #define STS_T16A 0x1 // Available 16-bit TSS) 244.6368 Tj
0 -246.8274 Td
-(0723 ushort es; // Even more saved state \(segment se\
-lectors\)) 305.796 Tj
+(0723 #define STS_LDT 0x2 // Local Descriptor Table) 253.3738 Tj
0 -256.3207 Td
-(0724 ushort padding4;) 100.4758 Tj
+(0724 #define STS_T16B 0x3 // Busy 16-bit TSS) 222.7942 Tj
0 -265.8141 Td
-(0725 ushort cs;) 74.2647 Tj
+(0725 #define STS_CG16 0x4 // 16-bit Call Gate) 227.1628 Tj
0 -275.3075 Td
-(0726 ushort padding5;) 100.4758 Tj
+(0726 #define STS_TG 0x5 // Task Gate / Coum Transmitio\
+ns) 283.9534 Tj
0 -284.8008 Td
-(0727 ushort ss;) 74.2647 Tj
+(0727 #define STS_IG16 0x6 // 16-bit Interrupt Gate) 249.0053 Tj
0 -294.2942 Td
-(0728 ushort padding6;) 100.4758 Tj
+(0728 #define STS_TG16 0x7 // 16-bit Trap Gate) 227.1628 Tj
0 -303.7875 Td
-(0729 ushort ds;) 74.2647 Tj
+(0729 #define STS_T32A 0x9 // Available 32-bit TSS) 244.6368 Tj
0 -313.2809 Td
-(0730 ushort padding7;) 100.4758 Tj
+(0730 #define STS_T32B 0xB // Busy 32-bit TSS) 222.7942 Tj
0 -322.7743 Td
-(0731 ushort fs;) 74.2647 Tj
+(0731 #define STS_CG32 0xC // 32-bit Call Gate) 227.1628 Tj
0 -332.2676 Td
-(0732 ushort padding8;) 100.4758 Tj
+(0732 #define STS_IG32 0xE // 32-bit Interrupt Gate) 249.0053 Tj
0 -341.761 Td
-(0733 ushort gs;) 74.2647 Tj
+(0733 #define STS_TG32 0xF // 32-bit Trap Gate) 227.1628 Tj
0 -351.2543 Td
-(0734 ushort padding9;) 100.4758 Tj
+(0734 ) 21.8426 Tj
0 -360.7477 Td
-(0735 ushort ldt;) 78.6333 Tj
+(0735 ) 21.8426 Tj
0 -370.2411 Td
-(0736 ushort padding10;) 104.8443 Tj
+(0736 ) 21.8426 Tj
0 -379.7344 Td
-(0737 ushort t; // Trap on task switch) 209.6887 Tj
+(0737 ) 21.8426 Tj
0 -389.2278 Td
-(0738 ushort iomb; // I/O map base address) 214.0572 Tj
+(0738 ) 21.8426 Tj
0 -398.7211 Td
-(0739 };) 30.5796 Tj
+(0739 ) 21.8426 Tj
0 -408.2145 Td
(0740 ) 21.8426 Tj
0 -417.7079 Td
@@ -5658,107 +5698,90 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/mmu.h Page 4) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/mmu.h Page 3) 157.2665 Tj
0 -28.4801 Td
-(0750 // Gate descriptors for interrupts and traps) 214.0572 Tj
+(0750 // Task state segment format) 144.161 Tj
0 -37.9735 Td
-(0751 struct gatedesc {) 96.1073 Tj
+(0751 struct taskstate {) 100.4758 Tj
0 -47.4668 Td
-(0752 uint off_15_0 : 16; // low 16 bits of offset in segmen\
-t) 279.5849 Tj
+(0752 uint link; // Old ts selector) 192.2146 Tj
0 -56.9602 Td
-(0753 uint cs : 16; // code segment selector) 231.5313 Tj
+(0753 uint esp0; // Stack pointers and segment selecto\
+rs) 283.9534 Tj
0 -66.4535 Td
-(0754 uint args : 5; // # args, 0 for interrupt/trap ga\
-tes) 288.322 Tj
+(0754 ushort ss0; // after an increase in privilege l\
+evel) 292.6905 Tj
0 -75.9469 Td
-(0755 uint rsv1 : 3; // reserved\(should be zero I gues\
-s\)) 279.5849 Tj
+(0755 ushort padding1;) 100.4758 Tj
0 -85.4403 Td
-(0756 uint type : 4; // type\(STS_{TG,IG32,TG32}\)) 244.6368 Tj
+(0756 uint *esp1;) 78.6333 Tj
0 -94.9336 Td
-(0757 uint s : 1; // must be 0 \(system\)) 218.4257 Tj
+(0757 ushort ss1;) 78.6333 Tj
0 -104.427 Td
-(0758 uint dpl : 2; // descriptor\(meaning new\) privi\
-lege level) 310.1645 Tj
+(0758 ushort padding2;) 100.4758 Tj
0 -113.9203 Td
-(0759 uint p : 1; // Present) 170.3721 Tj
+(0759 uint *esp2;) 78.6333 Tj
0 -123.4137 Td
-(0760 uint off_31_16 : 16; // high bits of offset in segment) 270.8479 Tj
+(0760 ushort ss2;) 78.6333 Tj
0 -132.9071 Td
-(0761 };) 30.5796 Tj
+(0761 ushort padding3;) 100.4758 Tj
0 -142.4004 Td
-(0762 ) 21.8426 Tj
+(0762 void *cr3; // Page directory base) 209.6887 Tj
0 -151.8938 Td
-(0763 // Set up a normal interrupt/trap gate descriptor.) 240.2683 Tj
+(0763 uint *eip; // Saved state from last task switch) 270.8479 Tj
0 -161.3871 Td
-(0764 // - istrap: 1 for a trap \(= exception\) gate, 0 for an i\
-nterrupt gate.) 327.6386 Tj
+(0764 uint eflags;) 83.0018 Tj
0 -170.8805 Td
-(0765 // interrupt gate clears FL_IF, trap gate leaves FL_IF a\
-lone) 292.6905 Tj
+(0765 uint eax; // More saved state \(registers\)) 249.0053 Tj
0 -180.3739 Td
-(0766 // - sel: Code segment selector for interrupt/trap handler) 275.2164 Tj
+(0766 uint ecx;) 69.8962 Tj
0 -189.8672 Td
-(0767 // - off: Offset in code segment for interrupt/trap handle\
-r) 279.5849 Tj
+(0767 uint edx;) 69.8962 Tj
0 -199.3606 Td
-(0768 // - dpl: Descriptor Privilege Level -) 187.8461 Tj
+(0768 uint ebx;) 69.8962 Tj
0 -208.8539 Td
-(0769 // the privilege level required for software to inv\
-oke) 288.322 Tj
+(0769 uint *esp;) 74.2647 Tj
0 -218.3473 Td
-(0770 // this interrupt/trap gate explicitly using an int\
- instruction.) 332.0071 Tj
+(0770 uint *ebp;) 74.2647 Tj
0 -227.8407 Td
-(0771 #define SETGATE\(gate, istrap, sel, off, d\) \
- \\) 279.5849 Tj
+(0771 uint esi;) 69.8962 Tj
0 -237.334 Td
-(0772 { \
-\\) 279.5849 Tj
+(0772 uint edi;) 69.8962 Tj
0 -246.8274 Td
-(0773 \(gate\).off_15_0 = \(uint\) \(off\) & 0xffff; \
- \\) 279.5849 Tj
+(0773 ushort es; // Even more saved state \(segment se\
+lectors\)) 305.796 Tj
0 -256.3207 Td
-(0774 \(gate\).cs = \(sel\); \
- \\) 279.5849 Tj
+(0774 ushort padding4;) 100.4758 Tj
0 -265.8141 Td
-(0775 \(gate\).args = 0; \
- \\) 279.5849 Tj
+(0775 ushort cs;) 74.2647 Tj
0 -275.3075 Td
-(0776 \(gate\).rsv1 = 0; \
- \\) 279.5849 Tj
+(0776 ushort padding5;) 100.4758 Tj
0 -284.8008 Td
-(0777 \(gate\).type = \(istrap\) ? STS_TG32 : STS_IG32; \
- \\) 279.5849 Tj
+(0777 ushort ss;) 74.2647 Tj
0 -294.2942 Td
-(0778 \(gate\).s = 0; \
- \\) 279.5849 Tj
+(0778 ushort padding6;) 100.4758 Tj
0 -303.7875 Td
-(0779 \(gate\).dpl = \(d\); \
- \\) 279.5849 Tj
+(0779 ushort ds;) 74.2647 Tj
0 -313.2809 Td
-(0780 \(gate\).p = 1; \
- \\) 279.5849 Tj
+(0780 ushort padding7;) 100.4758 Tj
0 -322.7743 Td
-(0781 \(gate\).off_31_16 = \(uint\) \(off\) >> 16; \
- \\) 279.5849 Tj
+(0781 ushort fs;) 74.2647 Tj
0 -332.2676 Td
-(0782 }) 26.2111 Tj
+(0782 ushort padding8;) 100.4758 Tj
0 -341.761 Td
-(0783 ) 21.8426 Tj
+(0783 ushort gs;) 74.2647 Tj
0 -351.2543 Td
-(0784 ) 21.8426 Tj
+(0784 ushort padding9;) 100.4758 Tj
0 -360.7477 Td
-(0785 ) 21.8426 Tj
+(0785 ushort ldt;) 78.6333 Tj
0 -370.2411 Td
-(0786 ) 21.8426 Tj
+(0786 ushort padding10;) 104.8443 Tj
0 -379.7344 Td
-(0787 ) 21.8426 Tj
+(0787 ushort t; // Trap on task switch) 209.6887 Tj
0 -389.2278 Td
-(0788 ) 21.8426 Tj
+(0788 ushort iomb; // I/O map base address) 214.0572 Tj
0 -398.7211 Td
-(0789 ) 21.8426 Tj
+(0789 };) 30.5796 Tj
0 -408.2145 Td
(0790 ) 21.8426 Tj
0 -417.7079 Td
@@ -5809,6 +5832,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -5826,92 +5851,111 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/elf.h Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/mmu.h Page 4) 157.2665 Tj
0 -28.4801 Td
-(0800 // Format of an ELF executable file) 174.7406 Tj
+(0800 // Gate descriptors for interrupts and traps) 214.0572 Tj
0 -37.9735 Td
-(0801 ) 21.8426 Tj
+(0801 struct gatedesc {) 96.1073 Tj
0 -47.4668 Td
-(0802 #define ELF_MAGIC 0x464C457FU // "\\x7FELF" in little end\
-ian) 283.9534 Tj
+(0802 uint off_15_0 : 16; // low 16 bits of offset in segmen\
+t) 279.5849 Tj
0 -56.9602 Td
-(0803 ) 21.8426 Tj
+(0803 uint cs : 16; // code segment selector) 231.5313 Tj
0 -66.4535 Td
-(0804 // File header) 83.0018 Tj
+(0804 uint args : 5; // # args, 0 for interrupt/trap ga\
+tes) 288.322 Tj
0 -75.9469 Td
-(0805 struct elfhdr {) 87.3703 Tj
+(0805 uint rsv1 : 3; // reserved\(should be zero I gues\
+s\)) 279.5849 Tj
0 -85.4403 Td
-(0806 uint magic; // must equal ELF_MAGIC) 187.8461 Tj
+(0806 uint type : 4; // type\(STS_{TG,IG32,TG32}\)) 244.6368 Tj
0 -94.9336 Td
-(0807 uchar elf[12];) 91.7388 Tj
+(0807 uint s : 1; // must be 0 \(system\)) 218.4257 Tj
0 -104.427 Td
-(0808 ushort type;) 83.0018 Tj
+(0808 uint dpl : 2; // descriptor\(meaning new\) privi\
+lege level) 310.1645 Tj
0 -113.9203 Td
-(0809 ushort machine;) 96.1073 Tj
+(0809 uint p : 1; // Present) 170.3721 Tj
0 -123.4137 Td
-(0810 uint version;) 87.3703 Tj
+(0810 uint off_31_16 : 16; // high bits of offset in segment) 270.8479 Tj
0 -132.9071 Td
-(0811 uint entry;) 78.6333 Tj
+(0811 };) 30.5796 Tj
0 -142.4004 Td
-(0812 uint phoff;) 78.6333 Tj
+(0812 ) 21.8426 Tj
0 -151.8938 Td
-(0813 uint shoff;) 78.6333 Tj
+(0813 // Set up a normal interrupt/trap gate descriptor.) 240.2683 Tj
0 -161.3871 Td
-(0814 uint flags;) 78.6333 Tj
+(0814 // - istrap: 1 for a trap \(= exception\) gate, 0 for an i\
+nterrupt gate.) 327.6386 Tj
0 -170.8805 Td
-(0815 ushort ehsize;) 91.7388 Tj
+(0815 // interrupt gate clears FL_IF, trap gate leaves FL_IF a\
+lone) 292.6905 Tj
0 -180.3739 Td
-(0816 ushort phentsize;) 104.8443 Tj
+(0816 // - sel: Code segment selector for interrupt/trap handler) 275.2164 Tj
0 -189.8672 Td
-(0817 ushort phnum;) 87.3703 Tj
+(0817 // - off: Offset in code segment for interrupt/trap handle\
+r) 279.5849 Tj
0 -199.3606 Td
-(0818 ushort shentsize;) 104.8443 Tj
+(0818 // - dpl: Descriptor Privilege Level -) 187.8461 Tj
0 -208.8539 Td
-(0819 ushort shnum;) 87.3703 Tj
+(0819 // the privilege level required for software to inv\
+oke) 288.322 Tj
0 -218.3473 Td
-(0820 ushort shstrndx;) 100.4758 Tj
+(0820 // this interrupt/trap gate explicitly using an int\
+ instruction.) 332.0071 Tj
0 -227.8407 Td
-(0821 };) 30.5796 Tj
+(0821 #define SETGATE\(gate, istrap, sel, off, d\) \
+ \\) 279.5849 Tj
0 -237.334 Td
-(0822 ) 21.8426 Tj
+(0822 { \
+\\) 279.5849 Tj
0 -246.8274 Td
-(0823 // Program section header) 131.0554 Tj
+(0823 \(gate\).off_15_0 = \(uint\) \(off\) & 0xffff; \
+ \\) 279.5849 Tj
0 -256.3207 Td
-(0824 struct proghdr {) 91.7388 Tj
+(0824 \(gate\).cs = \(sel\); \
+ \\) 279.5849 Tj
0 -265.8141 Td
-(0825 uint type;) 74.2647 Tj
+(0825 \(gate\).args = 0; \
+ \\) 279.5849 Tj
0 -275.3075 Td
-(0826 uint offset;) 83.0018 Tj
+(0826 \(gate\).rsv1 = 0; \
+ \\) 279.5849 Tj
0 -284.8008 Td
-(0827 uint va;) 65.5277 Tj
+(0827 \(gate\).type = \(istrap\) ? STS_TG32 : STS_IG32; \
+ \\) 279.5849 Tj
0 -294.2942 Td
-(0828 uint pa;) 65.5277 Tj
+(0828 \(gate\).s = 0; \
+ \\) 279.5849 Tj
0 -303.7875 Td
-(0829 uint filesz;) 83.0018 Tj
+(0829 \(gate\).dpl = \(d\); \
+ \\) 279.5849 Tj
0 -313.2809 Td
-(0830 uint memsz;) 78.6333 Tj
+(0830 \(gate\).p = 1; \
+ \\) 279.5849 Tj
0 -322.7743 Td
-(0831 uint flags;) 78.6333 Tj
+(0831 \(gate\).off_31_16 = \(uint\) \(off\) >> 16; \
+ \\) 279.5849 Tj
0 -332.2676 Td
-(0832 uint align;) 78.6333 Tj
+(0832 }) 26.2111 Tj
0 -341.761 Td
-(0833 };) 30.5796 Tj
+(0833 ) 21.8426 Tj
0 -351.2543 Td
(0834 ) 21.8426 Tj
0 -360.7477 Td
-(0835 // Values for Proghdr type) 135.4239 Tj
+(0835 ) 21.8426 Tj
0 -370.2411 Td
-(0836 #define ELF_PROG_LOAD 1) 166.0035 Tj
+(0836 ) 21.8426 Tj
0 -379.7344 Td
(0837 ) 21.8426 Tj
0 -389.2278 Td
-(0838 // Flag bits for Proghdr flags) 152.898 Tj
+(0838 ) 21.8426 Tj
0 -398.7211 Td
-(0839 #define ELF_PROG_FLAG_EXEC 1) 166.0035 Tj
+(0839 ) 21.8426 Tj
0 -408.2145 Td
-(0840 #define ELF_PROG_FLAG_WRITE 2) 166.0035 Tj
+(0840 ) 21.8426 Tj
0 -417.7079 Td
-(0841 #define ELF_PROG_FLAG_READ 4) 166.0035 Tj
+(0841 ) 21.8426 Tj
0 -427.2012 Td
(0842 ) 21.8426 Tj
0 -436.6946 Td
@@ -5946,91 +5990,92 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/elf.h Page 2) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/elf.h Page 1) 157.2665 Tj
0 -28.4801 Td
-(0850 // Blank page.) 83.0018 Tj
+(0850 // Format of an ELF executable file) 174.7406 Tj
0 -37.9735 Td
(0851 ) 21.8426 Tj
0 -47.4668 Td
-(0852 ) 21.8426 Tj
+(0852 #define ELF_MAGIC 0x464C457FU // "\\x7FELF" in little end\
+ian) 283.9534 Tj
0 -56.9602 Td
(0853 ) 21.8426 Tj
0 -66.4535 Td
-(0854 ) 21.8426 Tj
+(0854 // File header) 83.0018 Tj
0 -75.9469 Td
-(0855 ) 21.8426 Tj
+(0855 struct elfhdr {) 87.3703 Tj
0 -85.4403 Td
-(0856 ) 21.8426 Tj
+(0856 uint magic; // must equal ELF_MAGIC) 187.8461 Tj
0 -94.9336 Td
-(0857 ) 21.8426 Tj
+(0857 uchar elf[12];) 91.7388 Tj
0 -104.427 Td
-(0858 ) 21.8426 Tj
+(0858 ushort type;) 83.0018 Tj
0 -113.9203 Td
-(0859 ) 21.8426 Tj
+(0859 ushort machine;) 96.1073 Tj
0 -123.4137 Td
-(0860 ) 21.8426 Tj
+(0860 uint version;) 87.3703 Tj
0 -132.9071 Td
-(0861 ) 21.8426 Tj
+(0861 uint entry;) 78.6333 Tj
0 -142.4004 Td
-(0862 ) 21.8426 Tj
+(0862 uint phoff;) 78.6333 Tj
0 -151.8938 Td
-(0863 ) 21.8426 Tj
+(0863 uint shoff;) 78.6333 Tj
0 -161.3871 Td
-(0864 ) 21.8426 Tj
+(0864 uint flags;) 78.6333 Tj
0 -170.8805 Td
-(0865 ) 21.8426 Tj
+(0865 ushort ehsize;) 91.7388 Tj
0 -180.3739 Td
-(0866 ) 21.8426 Tj
+(0866 ushort phentsize;) 104.8443 Tj
0 -189.8672 Td
-(0867 ) 21.8426 Tj
+(0867 ushort phnum;) 87.3703 Tj
0 -199.3606 Td
-(0868 ) 21.8426 Tj
+(0868 ushort shentsize;) 104.8443 Tj
0 -208.8539 Td
-(0869 ) 21.8426 Tj
+(0869 ushort shnum;) 87.3703 Tj
0 -218.3473 Td
-(0870 ) 21.8426 Tj
+(0870 ushort shstrndx;) 100.4758 Tj
0 -227.8407 Td
-(0871 ) 21.8426 Tj
+(0871 };) 30.5796 Tj
0 -237.334 Td
(0872 ) 21.8426 Tj
0 -246.8274 Td
-(0873 ) 21.8426 Tj
+(0873 // Program section header) 131.0554 Tj
0 -256.3207 Td
-(0874 ) 21.8426 Tj
+(0874 struct proghdr {) 91.7388 Tj
0 -265.8141 Td
-(0875 ) 21.8426 Tj
+(0875 uint type;) 74.2647 Tj
0 -275.3075 Td
-(0876 ) 21.8426 Tj
+(0876 uint offset;) 83.0018 Tj
0 -284.8008 Td
-(0877 ) 21.8426 Tj
+(0877 uint va;) 65.5277 Tj
0 -294.2942 Td
-(0878 ) 21.8426 Tj
+(0878 uint pa;) 65.5277 Tj
0 -303.7875 Td
-(0879 ) 21.8426 Tj
+(0879 uint filesz;) 83.0018 Tj
0 -313.2809 Td
-(0880 ) 21.8426 Tj
+(0880 uint memsz;) 78.6333 Tj
0 -322.7743 Td
-(0881 ) 21.8426 Tj
+(0881 uint flags;) 78.6333 Tj
0 -332.2676 Td
-(0882 ) 21.8426 Tj
+(0882 uint align;) 78.6333 Tj
0 -341.761 Td
-(0883 ) 21.8426 Tj
+(0883 };) 30.5796 Tj
0 -351.2543 Td
(0884 ) 21.8426 Tj
0 -360.7477 Td
-(0885 ) 21.8426 Tj
+(0885 // Values for Proghdr type) 135.4239 Tj
0 -370.2411 Td
-(0886 ) 21.8426 Tj
+(0886 #define ELF_PROG_LOAD 1) 166.0035 Tj
0 -379.7344 Td
(0887 ) 21.8426 Tj
0 -389.2278 Td
-(0888 ) 21.8426 Tj
+(0888 // Flag bits for Proghdr flags) 152.898 Tj
0 -398.7211 Td
-(0889 ) 21.8426 Tj
+(0889 #define ELF_PROG_FLAG_EXEC 1) 166.0035 Tj
0 -408.2145 Td
-(0890 ) 21.8426 Tj
+(0890 #define ELF_PROG_FLAG_WRITE 2) 166.0035 Tj
0 -417.7079 Td
-(0891 ) 21.8426 Tj
+(0891 #define ELF_PROG_FLAG_READ 4) 166.0035 Tj
0 -427.2012 Td
(0892 ) 21.8426 Tj
0 -436.6946 Td
@@ -6077,6 +6122,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -6094,7 +6141,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/bootasm.S Page 1) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/bootasm.S Page 1) 174.7406 Tj
0 -28.4801 Td
(0900 #include "asm.h") 91.7388 Tj
0 -37.9735 Td
@@ -6113,27 +6160,23 @@ n real mode) 323.2701 Tj
0 -85.4403 Td
(0906 ) 21.8426 Tj
0 -94.9336 Td
-(0907 .set PROT_MODE_CSEG, 0x8 # kernel code segment sel\
-ector) 297.059 Tj
+(0907 #define SEG_KCODE 1 // kernel code) 174.7406 Tj
0 -104.427 Td
-(0908 .set PROT_MODE_DSEG, 0x10 # kernel data segment sel\
-ector) 297.059 Tj
+(0908 #define SEG_KDATA 2 // kernel data+stack) 200.9517 Tj
0 -113.9203 Td
-(0909 .set CR0_PE_ON, 0x1 # protected mode enable f\
-lag) 288.322 Tj
+(0909 ) 21.8426 Tj
0 -123.4137 Td
-(0910 ) 21.8426 Tj
+(0910 #define CR0_PE 1 // protected mode enable bit) 235.8998 Tj
0 -132.9071 Td
-(0911 .globl start) 74.2647 Tj
+(0911 ) 21.8426 Tj
0 -142.4004 Td
-(0912 start:) 48.0537 Tj
+(0912 .code16 # Assemble for 16-bit mode) 266.4794 Tj
0 -151.8938 Td
-(0913 .code16 # Assemble for 16-bit mode) 266.4794 Tj
+(0913 .globl start) 74.2647 Tj
0 -161.3871 Td
-(0914 cli # Disable interrupts) 240.2683 Tj
+(0914 start:) 48.0537 Tj
0 -170.8805 Td
-(0915 cld # String operations incremen\
-t) 279.5849 Tj
+(0915 cli # Disable interrupts) 240.2683 Tj
0 -180.3739 Td
(0916 ) 21.8426 Tj
0 -189.8672 Td
@@ -6224,7 +6267,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/bootasm.S Page 2) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/bootasm.S Page 2) 174.7406 Tj
0 -28.4801 Td
(0950 # Switch from real to protected mode, using a bootstrap \
GDT) 288.322 Tj
@@ -6240,7 +6283,7 @@ GDT) 288.322 Tj
0 -75.9469 Td
(0955 movl %cr0, %eax) 109.2129 Tj
0 -85.4403 Td
-(0956 orl $CR0_PE_ON, %eax) 135.4239 Tj
+(0956 orl $CR0_PE, %eax) 122.3184 Tj
0 -94.9336 Td
(0957 movl %eax, %cr0) 109.2129 Tj
0 -104.427 Td
@@ -6250,82 +6293,83 @@ GDT) 288.322 Tj
0 -123.4137 Td
(0960 # Switches processor into 32-bit mode.) 196.5831 Tj
0 -132.9071 Td
-(0961 ljmp $PROT_MODE_CSEG, $protcseg) 179.1091 Tj
+(0961 ljmp $\(SEG_KCODE<<3\), $start32) 174.7406 Tj
0 -142.4004 Td
(0962 ) 21.8426 Tj
0 -151.8938 Td
-(0963 .code32 # Assemble for 32-bit mode) 266.4794 Tj
+(0963 .code32 # Assemble for 32-bit mode) 266.4794 Tj
0 -161.3871 Td
-(0964 protcseg:) 61.1592 Tj
+(0964 start32:) 56.7907 Tj
0 -170.8805 Td
(0965 # Set up the protected-mode data segment registers) 249.0053 Tj
0 -180.3739 Td
-(0966 movw $PROT_MODE_DSEG, %ax # Our data segment selec\
-tor) 288.322 Tj
+(0966 movw $\(SEG_KDATA<<3\), %ax # Our data segment sel\
+ector) 288.322 Tj
0 -189.8672 Td
(0967 movw %ax, %ds # -> DS: Data Segment) 262.1109 Tj
0 -199.3606 Td
(0968 movw %ax, %es # -> ES: Extra Segment) 266.4794 Tj
0 -208.8539 Td
-(0969 movw %ax, %fs # -> FS) 200.9517 Tj
+(0969 movw %ax, %ss # -> SS: Stack Segment) 266.4794 Tj
0 -218.3473 Td
-(0970 movw %ax, %gs # -> GS) 200.9517 Tj
+(0970 movw $0, %ax # Zero segments not read\
+y for use) 314.533 Tj
0 -227.8407 Td
-(0971 movw %ax, %ss # -> SS: Stack Segment) 266.4794 Tj
+(0971 movw %ax, %fs # -> FS) 200.9517 Tj
0 -237.334 Td
-(0972 ) 21.8426 Tj
+(0972 movw %ax, %gs # -> GS) 200.9517 Tj
0 -246.8274 Td
-(0973 # Set up the stack pointer and call into C.) 218.4257 Tj
+(0973 ) 21.8426 Tj
0 -256.3207 Td
-(0974 movl $start, %esp) 117.9499 Tj
+(0974 # Set up the stack pointer and call into C.) 218.4257 Tj
0 -265.8141 Td
-(0975 call bootmain) 100.4758 Tj
+(0975 movl $start, %esp) 117.9499 Tj
0 -275.3075 Td
-(0976 ) 21.8426 Tj
+(0976 call bootmain) 100.4758 Tj
0 -284.8008 Td
-(0977 # If bootmain returns \(it shouldn't\), loop.) 218.4257 Tj
+(0977 ) 21.8426 Tj
0 -294.2942 Td
-(0978 spin:) 43.6851 Tj
+(0978 # If bootmain returns \(it shouldn't\), trigger a Bochs) 262.1109 Tj
0 -303.7875 Td
-(0979 jmp spin) 83.0018 Tj
+(0979 # breakpoint if running under Bochs, then loop.) 235.8998 Tj
0 -313.2809 Td
-(0980 ) 21.8426 Tj
+(0980 movw $0x8a00, %ax # 0x8a00 -> port 0x8a00) 270.8479 Tj
0 -322.7743 Td
-(0981 # Bootstrap GDT) 87.3703 Tj
+(0981 movw %ax, %dx) 100.4758 Tj
0 -332.2676 Td
-(0982 .p2align 2 # force 4 byte a\
-lignment) 310.1645 Tj
+(0982 outw %ax, %dx) 100.4758 Tj
0 -341.761 Td
-(0983 gdt:) 39.3166 Tj
+(0983 movw $0x8e00, %ax # 0x8e00 -> port 0x8a00) 270.8479 Tj
0 -351.2543 Td
-(0984 SEG_NULLASM # null seg) 249.0053 Tj
+(0984 outw %ax, %dx) 100.4758 Tj
0 -360.7477 Td
-(0985 SEG_ASM\(STA_X|STA_R, 0x0, 0xffffffff\) # code seg) 249.0053 Tj
+(0985 spin:) 43.6851 Tj
0 -370.2411 Td
-(0986 SEG_ASM\(STA_W, 0x0, 0xffffffff\) # data seg) 249.0053 Tj
+(0986 jmp spin) 83.0018 Tj
0 -379.7344 Td
(0987 ) 21.8426 Tj
0 -389.2278 Td
-(0988 gdtdesc:) 56.7907 Tj
+(0988 # Bootstrap GDT) 87.3703 Tj
0 -398.7211 Td
-(0989 .word 0x17 # sizeof\(gdt\) \
-- 1) 279.5849 Tj
+(0989 .p2align 2 # force 4 byte a\
+lignment) 310.1645 Tj
0 -408.2145 Td
-(0990 .long gdt # address gdt) 262.1109 Tj
+(0990 gdt:) 39.3166 Tj
0 -417.7079 Td
-(0991 ) 21.8426 Tj
+(0991 SEG_NULLASM # null seg) 249.0053 Tj
0 -427.2012 Td
-(0992 ) 21.8426 Tj
+(0992 SEG_ASM\(STA_X|STA_R, 0x0, 0xffffffff\) # code seg) 249.0053 Tj
0 -436.6946 Td
-(0993 ) 21.8426 Tj
+(0993 SEG_ASM\(STA_W, 0x0, 0xffffffff\) # data seg) 249.0053 Tj
0 -446.1879 Td
(0994 ) 21.8426 Tj
0 -455.6813 Td
-(0995 ) 21.8426 Tj
+(0995 gdtdesc:) 56.7907 Tj
0 -465.1747 Td
-(0996 ) 21.8426 Tj
+(0996 .word \(gdtdesc - gdt - 1\) \
+ # sizeof\(gdt\) - 1) 345.1126 Tj
0 -474.668 Td
-(0997 ) 21.8426 Tj
+(0997 .long gdt # address gdt) 262.1109 Tj
0 -484.1614 Td
(0998 ) 21.8426 Tj
0 -493.6547 Td
@@ -6360,6 +6404,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -6377,7 +6423,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/bootother.S Page 1) 183.4776 Tj
+(Aug 8 01:04 2009 xv6/bootother.S Page 1) 183.4776 Tj
0 -28.4801 Td
(1000 #include "asm.h") 91.7388 Tj
0 -37.9735 Td
@@ -6428,27 +6474,23 @@ g bootmain) 318.9016 Tj
0 -218.3473 Td
(1020 ) 21.8426 Tj
0 -227.8407 Td
-(1021 .set PROT_MODE_CSEG, 0x8 # kernel code segment sel\
-ector) 297.059 Tj
+(1021 #define SEG_KCODE 1 // kernel code) 174.7406 Tj
0 -237.334 Td
-(1022 .set PROT_MODE_DSEG, 0x10 # kernel data segment sel\
-ector) 297.059 Tj
+(1022 #define SEG_KDATA 2 // kernel data+stack) 200.9517 Tj
0 -246.8274 Td
-(1023 .set CR0_PE_ON, 0x1 # protected mode enable f\
-lag) 288.322 Tj
+(1023 ) 21.8426 Tj
0 -256.3207 Td
-(1024 ) 21.8426 Tj
+(1024 #define CR0_PE 1 // protected mode enable bit) 235.8998 Tj
0 -265.8141 Td
-(1025 .globl start) 74.2647 Tj
+(1025 ) 21.8426 Tj
0 -275.3075 Td
-(1026 start:) 48.0537 Tj
+(1026 .code16 # Assemble for 16-bit mode) 266.4794 Tj
0 -284.8008 Td
-(1027 .code16 # Assemble for 16-bit mode) 266.4794 Tj
+(1027 .globl start) 74.2647 Tj
0 -294.2942 Td
-(1028 cli # Disable interrupts) 240.2683 Tj
+(1028 start:) 48.0537 Tj
0 -303.7875 Td
-(1029 cld # String operations incremen\
-t) 279.5849 Tj
+(1029 cli # Disable interrupts) 240.2683 Tj
0 -313.2809 Td
(1030 ) 21.8426 Tj
0 -322.7743 Td
@@ -6508,14 +6550,14 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/bootother.S Page 2) 183.4776 Tj
+(Aug 8 01:04 2009 xv6/bootother.S Page 2) 183.4776 Tj
0 -28.4801 Td
(1050 # Switch from real to protected mode, using a bootstrap \
GDT) 288.322 Tj
0 -37.9735 Td
(1051 # and segment translation that makes virtual addresses) 266.4794 Tj
0 -47.4668 Td
-(1052 # identical to their physical addresses, so that the) 257.7424 Tj
+(1052 # identical to physical addresses, so that the) 231.5313 Tj
0 -56.9602 Td
(1053 # effective memory map does not change during the switch\
.) 279.5849 Tj
@@ -6524,7 +6566,7 @@ GDT) 288.322 Tj
0 -75.9469 Td
(1055 movl %cr0, %eax) 109.2129 Tj
0 -85.4403 Td
-(1056 orl $CR0_PE_ON, %eax) 135.4239 Tj
+(1056 orl $CR0_PE, %eax) 122.3184 Tj
0 -94.9336 Td
(1057 movl %eax, %cr0) 109.2129 Tj
0 -104.427 Td
@@ -6534,82 +6576,85 @@ GDT) 288.322 Tj
0 -123.4137 Td
(1060 # Switches processor into 32-bit mode.) 196.5831 Tj
0 -132.9071 Td
-(1061 ljmp $PROT_MODE_CSEG, $protcseg) 179.1091 Tj
+(1061 ljmp $\(SEG_KCODE<<3\), $start32) 174.7406 Tj
0 -142.4004 Td
(1062 ) 21.8426 Tj
0 -151.8938 Td
-(1063 .code32 # Assemble for 32-bit mode) 266.4794 Tj
+(1063 .code32 # Assemble for 32-bit mode) 266.4794 Tj
0 -161.3871 Td
-(1064 protcseg:) 61.1592 Tj
+(1064 start32:) 56.7907 Tj
0 -170.8805 Td
(1065 # Set up the protected-mode data segment registers) 249.0053 Tj
0 -180.3739 Td
-(1066 movw $PROT_MODE_DSEG, %ax # Our data segment selec\
-tor) 288.322 Tj
+(1066 movw $\(SEG_KDATA<<3\), %ax # Our data segment sel\
+ector) 288.322 Tj
0 -189.8672 Td
(1067 movw %ax, %ds # -> DS: Data Segment) 262.1109 Tj
0 -199.3606 Td
(1068 movw %ax, %es # -> ES: Extra Segment) 266.4794 Tj
0 -208.8539 Td
-(1069 movw %ax, %fs # -> FS) 200.9517 Tj
+(1069 movw %ax, %ss # -> SS: Stack Segment) 266.4794 Tj
0 -218.3473 Td
-(1070 movw %ax, %gs # -> GS) 200.9517 Tj
+(1070 movw $0, %ax # Zero segments not read\
+y for use) 314.533 Tj
0 -227.8407 Td
-(1071 movw %ax, %ss # -> SS: Stack Segment) 266.4794 Tj
+(1071 movw %ax, %fs # -> FS) 200.9517 Tj
0 -237.334 Td
-(1072 ) 21.8426 Tj
+(1072 movw %ax, %gs # -> GS) 200.9517 Tj
0 -246.8274 Td
-(1073 movl start-4, %esp) 122.3184 Tj
+(1073 ) 21.8426 Tj
0 -256.3207 Td
-(1074 movl start-8, %eax) 122.3184 Tj
+(1074 # Set up the stack pointer and call into C.) 218.4257 Tj
0 -265.8141 Td
-(1075 jmp *%eax) 87.3703 Tj
+(1075 movl start-4, %esp) 122.3184 Tj
0 -275.3075 Td
-(1076 ) 21.8426 Tj
+(1076 call) 48.0537 Tj
+-2507.8 TJm
+(*\(start-8\)) 43.6851 Tj
0 -284.8008 Td
-(1077 # Bootstrap GDT) 87.3703 Tj
+(1077 ) 21.8426 Tj
0 -294.2942 Td
-(1078 .p2align 2 # force 4 byte a\
-lignment) 310.1645 Tj
+(1078 # If the call returns \(it shouldn't\), trigger a Bochs) 262.1109 Tj
0 -303.7875 Td
-(1079 gdt:) 39.3166 Tj
+(1079 # breakpoint if running under Bochs, then loop.) 235.8998 Tj
0 -313.2809 Td
-(1080 SEG_NULLASM # null seg) 249.0053 Tj
+(1080 movw $0x8a00, %ax # 0x8a00 -> port 0x8a00) 270.8479 Tj
0 -322.7743 Td
-(1081 SEG_ASM\(STA_X|STA_R, 0x0, 0xffffffff\) # code seg) 249.0053 Tj
+(1081 movw %ax, %dx) 100.4758 Tj
0 -332.2676 Td
-(1082 SEG_ASM\(STA_W, 0x0, 0xffffffff\) # data seg) 249.0053 Tj
+(1082 outw %ax, %dx) 100.4758 Tj
0 -341.761 Td
-(1083 ) 21.8426 Tj
+(1083 movw $0x8e00, %ax # 0x8e00 -> port 0x8a00) 270.8479 Tj
0 -351.2543 Td
-(1084 gdtdesc:) 56.7907 Tj
+(1084 outw %ax, %dx) 100.4758 Tj
0 -360.7477 Td
-(1085 .word 0x17 # sizeof\(gdt\) \
-- 1) 279.5849 Tj
+(1085 spin:) 43.6851 Tj
0 -370.2411 Td
-(1086 .long gdt # address gdt) 262.1109 Tj
+(1086 jmp spin) 83.0018 Tj
0 -379.7344 Td
(1087 ) 21.8426 Tj
0 -389.2278 Td
-(1088 ) 21.8426 Tj
+(1088 # Bootstrap GDT) 87.3703 Tj
0 -398.7211 Td
-(1089 ) 21.8426 Tj
+(1089 .p2align 2 # force 4 byte a\
+lignment) 310.1645 Tj
0 -408.2145 Td
-(1090 ) 21.8426 Tj
+(1090 gdt:) 39.3166 Tj
0 -417.7079 Td
-(1091 ) 21.8426 Tj
+(1091 SEG_NULLASM # null seg) 249.0053 Tj
0 -427.2012 Td
-(1092 ) 21.8426 Tj
+(1092 SEG_ASM\(STA_X|STA_R, 0x0, 0xffffffff\) # code seg) 249.0053 Tj
0 -436.6946 Td
-(1093 ) 21.8426 Tj
+(1093 SEG_ASM\(STA_W, 0x0, 0xffffffff\) # data seg) 249.0053 Tj
0 -446.1879 Td
(1094 ) 21.8426 Tj
0 -455.6813 Td
-(1095 ) 21.8426 Tj
+(1095 gdtdesc:) 56.7907 Tj
0 -465.1747 Td
-(1096 ) 21.8426 Tj
+(1096 .word \(gdtdesc - gdt - 1\) \
+ # sizeof\(gdt\) - 1) 345.1126 Tj
0 -474.668 Td
-(1097 ) 21.8426 Tj
+(1097 .long gdt # address gdt) 262.1109 Tj
0 -484.1614 Td
(1098 ) 21.8426 Tj
0 -493.6547 Td
@@ -6644,6 +6689,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -6661,7 +6708,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/bootmain.c Page 1) 179.1091 Tj
+(Aug 8 01:04 2009 xv6/bootmain.c Page 1) 179.1091 Tj
0 -28.4801 Td
(1100 // Boot loader.) 87.3703 Tj
0 -37.9735 Td
@@ -6692,7 +6739,7 @@ arting at) 305.796 Tj
0 -142.4004 Td
(1112 ) 21.8426 Tj
0 -151.8938 Td
-(1113 void readseg\(uint, uint, uint\);) 157.2665 Tj
+(1113 void readseg\(uchar*, uint, uint\);) 166.0035 Tj
0 -161.3871 Td
(1114 ) 21.8426 Tj
0 -170.8805 Td
@@ -6708,59 +6755,59 @@ arting at) 305.796 Tj
0 -218.3473 Td
(1120 void \(*entry\)\(void\);) 117.9499 Tj
0 -227.8407 Td
-(1121 ) 21.8426 Tj
+(1121 uchar* va;) 74.2647 Tj
0 -237.334 Td
-(1122 elf = \(struct elfhdr*\)0x10000; // scratch space) 240.2683 Tj
+(1122 ) 21.8426 Tj
0 -246.8274 Td
-(1123 ) 21.8426 Tj
+(1123 elf = \(struct elfhdr*\)0x10000; // scratch space) 240.2683 Tj
0 -256.3207 Td
-(1124 // Read 1st page off disk) 139.7925 Tj
+(1124 ) 21.8426 Tj
0 -265.8141 Td
-(1125 readseg\(\(uint\)elf, SECTSIZE*8, 0\);) 179.1091 Tj
+(1125 // Read 1st page off disk) 139.7925 Tj
0 -275.3075 Td
-(1126 ) 21.8426 Tj
+(1126 readseg\(\(uchar*\)elf, 4096, 0\);) 161.635 Tj
0 -284.8008 Td
-(1127 // Is this an ELF executable?) 157.2665 Tj
+(1127 ) 21.8426 Tj
0 -294.2942 Td
-(1128 if\(elf->magic != ELF_MAGIC\)) 148.5295 Tj
+(1128 // Is this an ELF executable?) 157.2665 Tj
0 -303.7875 Td
-(1129 goto bad;) 78.6333 Tj
+(1129 if\(elf->magic != ELF_MAGIC\)) 148.5295 Tj
0 -313.2809 Td
-(1130 ) 21.8426 Tj
+(1130 return; // let bootasm.S handle error) 205.3202 Tj
0 -322.7743 Td
-(1131 // Load each program segment \(ignores ph flags\).) 240.2683 Tj
+(1131 ) 21.8426 Tj
0 -332.2676 Td
-(1132 ph = \(struct proghdr*\)\(\(uchar*\)elf + elf->phoff\);) 244.6368 Tj
+(1132 // Load each program segment \(ignores ph flags\).) 240.2683 Tj
0 -341.761 Td
-(1133 eph = ph + elf->phnum;) 126.6869 Tj
+(1133 ph = \(struct proghdr*\)\(\(uchar*\)elf + elf->phoff\);) 244.6368 Tj
0 -351.2543 Td
-(1134 for\(; ph < eph; ph++\)) 122.3184 Tj
+(1134 eph = ph + elf->phnum;) 126.6869 Tj
0 -360.7477 Td
-(1135 readseg\(ph->va & 0xFFFFFF, ph->memsz, ph->offset\);) 257.7424 Tj
+(1135 for\(; ph < eph; ph++\) {) 131.0554 Tj
0 -370.2411 Td
-(1136 ) 21.8426 Tj
+(1136 va = \(uchar*\)\(ph->va & 0xFFFFFF\);) 183.4776 Tj
0 -379.7344 Td
-(1137 // Call the entry point from the ELF header.) 222.7942 Tj
+(1137 readseg\(va, ph->filesz, ph->offset\);) 196.5831 Tj
0 -389.2278 Td
-(1138 // Does not return!) 113.5814 Tj
+(1138 if\(ph->memsz > ph->filesz\)) 152.898 Tj
0 -398.7211 Td
-(1139 entry = \(void\(*\)\(void\)\)\(elf->entry & 0xFFFFFF\);) 235.8998 Tj
+(1139 stosb\(va + ph->filesz, 0, ph->memsz - ph->filesz\);) 266.4794 Tj
0 -408.2145 Td
-(1140 entry\(\);) 65.5277 Tj
+(1140 }) 34.9481 Tj
0 -417.7079 Td
(1141 ) 21.8426 Tj
0 -427.2012 Td
-(1142 bad:) 39.3166 Tj
+(1142 // Call the entry point from the ELF header.) 222.7942 Tj
0 -436.6946 Td
-(1143 outw\(0x8A00, 0x8A00\);) 122.3184 Tj
+(1143 // Does not return!) 113.5814 Tj
0 -446.1879 Td
-(1144 outw\(0x8A00, 0x8E00\);) 122.3184 Tj
+(1144 entry = \(void\(*\)\(void\)\)\(elf->entry & 0xFFFFFF\);) 235.8998 Tj
0 -455.6813 Td
-(1145 for\(;;\)) 61.1592 Tj
+(1145 entry\(\);) 65.5277 Tj
0 -465.1747 Td
-(1146 ;) 43.6851 Tj
+(1146 }) 26.2111 Tj
0 -474.668 Td
-(1147 }) 26.2111 Tj
+(1147 ) 21.8426 Tj
0 -484.1614 Td
(1148 ) 21.8426 Tj
0 -493.6547 Td
@@ -6783,7 +6830,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/bootmain.c Page 2) 179.1091 Tj
+(Aug 8 01:04 2009 xv6/bootmain.c Page 2) 179.1091 Tj
0 -28.4801 Td
(1150 void) 39.3166 Tj
0 -37.9735 Td
@@ -6844,11 +6891,11 @@ q
0 -294.2942 Td
(1178 void) 39.3166 Tj
0 -303.7875 Td
-(1179 readseg\(uint va, uint count, uint offset\)) 200.9517 Tj
+(1179 readseg\(uchar* va, uint count, uint offset\)) 209.6887 Tj
0 -313.2809 Td
(1180 {) 26.2111 Tj
0 -322.7743 Td
-(1181 uint eva;) 69.8962 Tj
+(1181 uchar* eva;) 78.6333 Tj
0 -332.2676 Td
(1182 ) 21.8426 Tj
0 -341.761 Td
@@ -6858,7 +6905,7 @@ q
0 -360.7477 Td
(1185 // Round down to sector boundary.) 174.7406 Tj
0 -370.2411 Td
-(1186 va &= ~\(SECTSIZE - 1\);) 126.6869 Tj
+(1186 va -= offset % SECTSIZE;) 135.4239 Tj
0 -379.7344 Td
(1187 ) 21.8426 Tj
0 -389.2278 Td
@@ -6879,7 +6926,7 @@ matter --) 314.533 Tj
0 -446.1879 Td
(1194 for\(; va < eva; va += SECTSIZE, offset++\)) 209.6887 Tj
0 -455.6813 Td
-(1195 readsect\(\(uchar*\)va, offset\);) 166.0035 Tj
+(1195 readsect\(va, offset\);) 131.0554 Tj
0 -465.1747 Td
(1196 }) 26.2111 Tj
0 -474.668 Td
@@ -6918,6 +6965,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -6935,7 +6984,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/main.c Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/main.c Page 1) 161.635 Tj
0 -28.4801 Td
(1200 #include "types.h") 100.4758 Tj
0 -37.9735 Td
@@ -6951,61 +7000,61 @@ q
0 -85.4403 Td
(1206 ) 21.8426 Tj
0 -94.9336 Td
-(1207 static void bootothers\(void\);) 148.5295 Tj
+(1207 __thread struct cpu *c;) 122.3184 Tj
0 -104.427 Td
-(1208 static void mpmain\(void\) __attribute__\(\(noreturn\)\);) 244.6368 Tj
+(1208 __thread struct proc *cp;) 131.0554 Tj
0 -113.9203 Td
(1209 ) 21.8426 Tj
0 -123.4137 Td
-(1210 // Bootstrap processor starts running C code here.) 240.2683 Tj
+(1210 static void bootothers\(void\);) 148.5295 Tj
0 -132.9071 Td
-(1211 int) 34.9481 Tj
+(1211 static void mpmain\(void\) __attribute__\(\(noreturn\)\);) 244.6368 Tj
0 -142.4004 Td
-(1212 main\(void\)) 65.5277 Tj
+(1212 ) 21.8426 Tj
0 -151.8938 Td
-(1213 {) 26.2111 Tj
+(1213 // Bootstrap processor starts running C code here.) 240.2683 Tj
0 -161.3871 Td
-(1214 extern char edata[], end[];) 148.5295 Tj
+(1214 int) 34.9481 Tj
0 -170.8805 Td
-(1215 ) 21.8426 Tj
+(1215 main\(void\)) 65.5277 Tj
0 -180.3739 Td
-(1216 // clear BSS) 83.0018 Tj
+(1216 {) 26.2111 Tj
0 -189.8672 Td
-(1217 memset\(edata, 0, end - edata\);) 161.635 Tj
+(1217 mpinit\(\); // collect info about this machine) 222.7942 Tj
0 -199.3606 Td
-(1218 ) 21.8426 Tj
+(1218 lapicinit\(mpbcpu\(\)\);) 117.9499 Tj
0 -208.8539 Td
-(1219 mp_init\(\); // collect info about this machine) 227.1628 Tj
+(1219 ksegment\(\);) 78.6333 Tj
0 -218.3473 Td
-(1220 lapic_init\(mp_bcpu\(\)\);) 126.6869 Tj
+(1220 picinit\(\); // interrupt controller) 205.3202 Tj
0 -227.8407 Td
-(1221 cprintf\("\\ncpu%d: starting xv6\\n\\n", cpu\(\)\);) 222.7942 Tj
+(1221 ioapicinit\(\); // another interrupt controller) 240.2683 Tj
0 -237.334 Td
-(1222 ) 21.8426 Tj
+(1222 consoleinit\(\); // I/O devices & their interrupts) 249.0053 Tj
0 -246.8274 Td
-(1223 pinit\(\); // process table) 174.7406 Tj
+(1223 uartinit\(\); // serial port) 166.0035 Tj
0 -256.3207 Td
-(1224 binit\(\); // buffer cache) 170.3721 Tj
+(1224 cprintf\("\\ncpu%d: starting xv6\\n\\n", cpu\(\)\);) 222.7942 Tj
0 -265.8141 Td
-(1225 pic_init\(\); // interrupt controller) 205.3202 Tj
+(1225 ) 21.8426 Tj
0 -275.3075 Td
-(1226 ioapic_init\(\); // another interrupt controller) 240.2683 Tj
+(1226 kinit\(\); // physical memory allocator) 227.1628 Tj
0 -284.8008 Td
-(1227 kinit\(\); // physical memory allocator) 227.1628 Tj
+(1227 pinit\(\); // process table) 174.7406 Tj
0 -294.2942 Td
(1228 tvinit\(\); // trap vectors) 170.3721 Tj
0 -303.7875 Td
-(1229 fileinit\(\); // file table) 161.635 Tj
+(1229 binit\(\); // buffer cache) 170.3721 Tj
0 -313.2809 Td
-(1230 iinit\(\); // inode cache) 166.0035 Tj
+(1230 fileinit\(\); // file table) 161.635 Tj
0 -322.7743 Td
-(1231 console_init\(\); // I/O devices & their interrupts) 249.0053 Tj
+(1231 iinit\(\); // inode cache) 166.0035 Tj
0 -332.2676 Td
-(1232 ide_init\(\); // disk) 135.4239 Tj
+(1232 ideinit\(\); // disk) 135.4239 Tj
0 -341.761 Td
(1233 if\(!ismp\)) 69.8962 Tj
0 -351.2543 Td
-(1234 timer_init\(\); // uniprocessor timer) 196.5831 Tj
+(1234 timerinit\(\); // uniprocessor timer) 196.5831 Tj
0 -360.7477 Td
(1235 userinit\(\); // first user process) 196.5831 Tj
0 -370.2411 Td
@@ -7054,7 +7103,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/main.c Page 2) 161.635 Tj
+(Aug 8 01:04 2009 xv6/main.c Page 2) 161.635 Tj
0 -28.4801 Td
(1250 // Bootstrap processor gets here after setting up the hard\
ware.) 297.059 Tj
@@ -7067,17 +7116,17 @@ ware.) 297.059 Tj
0 -66.4535 Td
(1254 {) 26.2111 Tj
0 -75.9469 Td
-(1255 cprintf\("cpu%d: mpmain\\n", cpu\(\)\);) 179.1091 Tj
+(1255 if\(cpu\(\) != mpbcpu\(\)\)) 122.3184 Tj
0 -85.4403 Td
-(1256 idtinit\(\);) 74.2647 Tj
+(1256 lapicinit\(cpu\(\)\);) 113.5814 Tj
0 -94.9336 Td
-(1257 if\(cpu\(\) != mp_bcpu\(\)\)) 126.6869 Tj
+(1257 ksegment\(\);) 78.6333 Tj
0 -104.427 Td
-(1258 lapic_init\(cpu\(\)\);) 117.9499 Tj
+(1258 cprintf\("cpu%d: mpmain\\n", cpu\(\)\);) 179.1091 Tj
0 -113.9203 Td
-(1259 setupsegs\(0\);) 87.3703 Tj
+(1259 idtinit\(\);) 74.2647 Tj
0 -123.4137 Td
-(1260 xchg\(&cpus[cpu\(\)].booted, 1\);) 157.2665 Tj
+(1260 xchg\(&c->booted, 1\);) 117.9499 Tj
0 -132.9071 Td
(1261 ) 21.8426 Tj
0 -142.4004 Td
@@ -7131,7 +7180,7 @@ bootother_size\);) 332.0071 Tj
0 -360.7477 Td
(1285 *\(void**\)\(code-8\) = mpmain;) 157.2665 Tj
0 -370.2411 Td
-(1286 lapic_startap\(c->apicid, \(uint\)code\);) 200.9517 Tj
+(1286 lapicstartap\(c->apicid, \(uint\)code\);) 196.5831 Tj
0 -379.7344 Td
(1287 ) 21.8426 Tj
0 -389.2278 Td
@@ -7188,6 +7237,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -7205,7 +7256,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/spinlock.h Page 1) 179.1091 Tj
+(Aug 8 01:04 2009 xv6/spinlock.h Page 1) 179.1091 Tj
0 -28.4801 Td
(1300 // Mutual exclusion lock.) 131.0554 Tj
0 -37.9735 Td
@@ -7326,7 +7377,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/spinlock.c Page 1) 179.1091 Tj
+(Aug 8 01:04 2009 xv6/spinlock.c Page 1) 179.1091 Tj
0 -28.4801 Td
(1350 // Mutual exclusion spin locks.) 157.2665 Tj
0 -37.9735 Td
@@ -7348,74 +7399,74 @@ q
0 -113.9203 Td
(1359 ) 21.8426 Tj
0 -123.4137 Td
-(1360 extern int use_console_lock;) 144.161 Tj
+(1360 void) 39.3166 Tj
0 -132.9071 Td
-(1361 ) 21.8426 Tj
+(1361 initlock\(struct spinlock *lk, char *name\)) 200.9517 Tj
0 -142.4004 Td
-(1362 void) 39.3166 Tj
+(1362 {) 26.2111 Tj
0 -151.8938 Td
-(1363 initlock\(struct spinlock *lock, char *name\)) 209.6887 Tj
+(1363 lk->name = name;) 100.4758 Tj
0 -161.3871 Td
-(1364 {) 26.2111 Tj
+(1364 lk->locked = 0;) 96.1073 Tj
0 -170.8805 Td
-(1365 lock->name = name;) 109.2129 Tj
+(1365 lk->cpu = 0xffffffff;) 122.3184 Tj
0 -180.3739 Td
-(1366 lock->locked = 0;) 104.8443 Tj
+(1366 }) 26.2111 Tj
0 -189.8672 Td
-(1367 lock->cpu = 0xffffffff;) 131.0554 Tj
+(1367 ) 21.8426 Tj
0 -199.3606 Td
-(1368 }) 26.2111 Tj
+(1368 // Acquire the lock.) 109.2129 Tj
0 -208.8539 Td
-(1369 ) 21.8426 Tj
+(1369 // Loops \(spins\) until the lock is acquired.) 214.0572 Tj
0 -218.3473 Td
-(1370 // Acquire the lock.) 109.2129 Tj
+(1370 // Holding a lock for a long time may cause) 209.6887 Tj
0 -227.8407 Td
-(1371 // Loops \(spins\) until the lock is acquired.) 214.0572 Tj
+(1371 // other CPUs to waste time spinning to acquire it.) 244.6368 Tj
0 -237.334 Td
-(1372 // Holding a lock for a long time may cause) 209.6887 Tj
+(1372 void) 39.3166 Tj
0 -246.8274 Td
-(1373 // other CPUs to waste time spinning to acquire it.) 244.6368 Tj
+(1373 acquire\(struct spinlock *lk\)) 144.161 Tj
0 -256.3207 Td
-(1374 void) 39.3166 Tj
+(1374 {) 26.2111 Tj
0 -265.8141 Td
-(1375 acquire\(struct spinlock *lock\)) 152.898 Tj
+(1375 pushcli\(\);) 74.2647 Tj
0 -275.3075 Td
-(1376 {) 26.2111 Tj
+(1376 if\(holding\(lk\)\)) 96.1073 Tj
0 -284.8008 Td
-(1377 pushcli\(\);) 74.2647 Tj
+(1377 panic\("acquire"\);) 113.5814 Tj
0 -294.2942 Td
-(1378 if\(holding\(lock\)\)) 104.8443 Tj
+(1378 ) 21.8426 Tj
0 -303.7875 Td
-(1379 panic\("acquire"\);) 113.5814 Tj
+(1379 // The xchg is atomic.) 126.6869 Tj
0 -313.2809 Td
-(1380 ) 21.8426 Tj
-0 -322.7743 Td
-(1381 // The xchg is atomic.) 126.6869 Tj
-0 -332.2676 Td
-(1382 // It also serializes, so that reads after acquire are n\
+(1380 // It also serializes, so that reads after acquire are n\
ot) 283.9534 Tj
+0 -322.7743 Td
+(1381 // reordered before it.) 131.0554 Tj
+0 -332.2676 Td
+(1382 while\(xchg\(&lk->locked, 1\) != 0\)) 170.3721 Tj
0 -341.761 Td
-(1383 // reordered before it.) 131.0554 Tj
+(1383 ;) 43.6851 Tj
0 -351.2543 Td
-(1384 while\(xchg\(&lock->locked, 1\) == 1\)) 179.1091 Tj
+(1384 ) 21.8426 Tj
0 -360.7477 Td
-(1385 ;) 43.6851 Tj
+(1385 // Record info about lock acquisition for debugging.) 257.7424 Tj
0 -370.2411 Td
-(1386 ) 21.8426 Tj
+(1386 // The +10 is only so that we can tell the difference) 262.1109 Tj
0 -379.7344 Td
-(1387 // Record info about lock acquisition for debugging.) 257.7424 Tj
+(1387 // between forgetting to initialize lock->cpu) 227.1628 Tj
0 -389.2278 Td
-(1388 // The +10 is only so that we can tell the difference) 262.1109 Tj
+(1388 // and holding a lock on cpu 0.) 166.0035 Tj
0 -398.7211 Td
-(1389 // between forgetting to initialize lock->cpu) 227.1628 Tj
+(1389 lk->cpu = cpu\(\) + 10;) 122.3184 Tj
0 -408.2145 Td
-(1390 // and holding a lock on cpu 0.) 166.0035 Tj
+(1390 getcallerpcs\(&lk, lk->pcs\);) 148.5295 Tj
0 -417.7079 Td
-(1391 lock->cpu = cpu\(\) + 10;) 131.0554 Tj
+(1391 }) 26.2111 Tj
0 -427.2012 Td
-(1392 getcallerpcs\(&lock, lock->pcs\);) 166.0035 Tj
+(1392 ) 21.8426 Tj
0 -436.6946 Td
-(1393 }) 26.2111 Tj
+(1393 ) 21.8426 Tj
0 -446.1879 Td
(1394 ) 21.8426 Tj
0 -455.6813 Td
@@ -7458,6 +7509,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -7475,106 +7528,110 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/spinlock.c Page 2) 179.1091 Tj
+(Aug 8 01:04 2009 xv6/spinlock.c Page 2) 179.1091 Tj
0 -28.4801 Td
(1400 // Release the lock.) 109.2129 Tj
0 -37.9735 Td
(1401 void) 39.3166 Tj
0 -47.4668 Td
-(1402 release\(struct spinlock *lock\)) 152.898 Tj
+(1402 release\(struct spinlock *lk\)) 144.161 Tj
0 -56.9602 Td
(1403 {) 26.2111 Tj
0 -66.4535 Td
-(1404 if\(!holding\(lock\)\)) 109.2129 Tj
+(1404 if\(!holding\(lk\)\)) 100.4758 Tj
0 -75.9469 Td
(1405 panic\("release"\);) 113.5814 Tj
0 -85.4403 Td
(1406 ) 21.8426 Tj
0 -94.9336 Td
-(1407 lock->pcs[0] = 0;) 104.8443 Tj
+(1407 lk->pcs[0] = 0;) 96.1073 Tj
0 -104.427 Td
-(1408 lock->cpu = 0xffffffff;) 131.0554 Tj
+(1408 lk->cpu = 0xffffffff;) 122.3184 Tj
0 -113.9203 Td
(1409 ) 21.8426 Tj
0 -123.4137 Td
(1410 // The xchg serializes, so that reads before release are) 275.2164 Tj
0 -132.9071 Td
-(1411 // not reordered after it. \(This reordering would be a\
-llowed) 297.059 Tj
+(1411 // not reordered after it. The 1996 PentiumPro manual \(\
+Volume 3,) 314.533 Tj
0 -142.4004 Td
-(1412 // by the Intel manuals, but does not happen on current) 270.8479 Tj
+(1412 // 7.2\) says reads can be carried out speculatively and\
+ in) 283.9534 Tj
0 -151.8938 Td
-(1413 // Intel processors. The xchg being asm volatile also k\
-eeps) 292.6905 Tj
+(1413 // any order, which implies we need to serialize here.) 266.4794 Tj
0 -161.3871 Td
-(1414 // gcc from delaying the above assignments.\)) 222.7942 Tj
+(1414 // But the 2007 Intel 64 Architecture Memory Ordering Wh\
+ite) 288.322 Tj
0 -170.8805 Td
-(1415 xchg\(&lock->locked, 0\);) 131.0554 Tj
+(1415 // Paper says that Intel 64 and IA-32 will not move a lo\
+ad) 283.9534 Tj
0 -180.3739 Td
-(1416 ) 21.8426 Tj
+(1416 // after a store. So lock->locked = 0 would work here.) 266.4794 Tj
0 -189.8672 Td
-(1417 popcli\(\);) 69.8962 Tj
+(1417 // The xchg being asm volatile ensures gcc emits it afte\
+r) 279.5849 Tj
0 -199.3606 Td
-(1418 }) 26.2111 Tj
+(1418 // the above assignments \(and after the critical sectio\
+n\).) 283.9534 Tj
0 -208.8539 Td
-(1419 ) 21.8426 Tj
+(1419 xchg\(&lk->locked, 0\);) 122.3184 Tj
0 -218.3473 Td
-(1420 // Record the current call stack in pcs[] by following the\
- %ebp chain.) 327.6386 Tj
+(1420 ) 21.8426 Tj
0 -227.8407 Td
-(1421 void) 39.3166 Tj
+(1421 popcli\(\);) 69.8962 Tj
0 -237.334 Td
-(1422 getcallerpcs\(void *v, uint pcs[]\)) 166.0035 Tj
+(1422 }) 26.2111 Tj
0 -246.8274 Td
-(1423 {) 26.2111 Tj
+(1423 ) 21.8426 Tj
0 -256.3207 Td
-(1424 uint *ebp;) 74.2647 Tj
+(1424 // Record the current call stack in pcs[] by following the\
+ %ebp chain.) 327.6386 Tj
0 -265.8141 Td
-(1425 int i;) 56.7907 Tj
+(1425 void) 39.3166 Tj
0 -275.3075 Td
-(1426 ) 21.8426 Tj
+(1426 getcallerpcs\(void *v, uint pcs[]\)) 166.0035 Tj
0 -284.8008 Td
-(1427 ebp = \(uint*\)v - 2;) 113.5814 Tj
+(1427 {) 26.2111 Tj
0 -294.2942 Td
-(1428 for\(i = 0; i < 10; i++\){) 135.4239 Tj
+(1428 uint *ebp;) 74.2647 Tj
0 -303.7875 Td
-(1429 if\(ebp == 0 || ebp == \(uint*\)0xffffffff\)) 214.0572 Tj
+(1429 int i;) 56.7907 Tj
0 -313.2809 Td
-(1430 break;) 74.2647 Tj
+(1430 ) 21.8426 Tj
0 -322.7743 Td
-(1431 pcs[i] = ebp[1]; // saved %eip) 187.8461 Tj
+(1431 ebp = \(uint*\)v - 2;) 113.5814 Tj
0 -332.2676 Td
-(1432 ebp = \(uint*\)ebp[0]; // saved %ebp) 187.8461 Tj
+(1432 for\(i = 0; i < 10; i++\){) 135.4239 Tj
0 -341.761 Td
-(1433 }) 34.9481 Tj
+(1433 if\(ebp == 0 || ebp == \(uint*\)0xffffffff\)) 214.0572 Tj
0 -351.2543 Td
-(1434 for\(; i < 10; i++\)) 109.2129 Tj
+(1434 break;) 74.2647 Tj
0 -360.7477 Td
-(1435 pcs[i] = 0;) 87.3703 Tj
+(1435 pcs[i] = ebp[1]; // saved %eip) 187.8461 Tj
0 -370.2411 Td
-(1436 }) 26.2111 Tj
+(1436 ebp = \(uint*\)ebp[0]; // saved %ebp) 187.8461 Tj
0 -379.7344 Td
-(1437 ) 21.8426 Tj
+(1437 }) 34.9481 Tj
0 -389.2278 Td
-(1438 // Check whether this cpu is holding the lock.) 222.7942 Tj
+(1438 for\(; i < 10; i++\)) 109.2129 Tj
0 -398.7211 Td
-(1439 int) 34.9481 Tj
+(1439 pcs[i] = 0;) 87.3703 Tj
0 -408.2145 Td
-(1440 holding\(struct spinlock *lock\)) 152.898 Tj
+(1440 }) 26.2111 Tj
0 -417.7079 Td
-(1441 {) 26.2111 Tj
+(1441 ) 21.8426 Tj
0 -427.2012 Td
-(1442 return lock->locked && lock->cpu == cpu\(\) + 10;) 235.8998 Tj
+(1442 // Check whether this cpu is holding the lock.) 222.7942 Tj
0 -436.6946 Td
-(1443 }) 26.2111 Tj
+(1443 int) 34.9481 Tj
0 -446.1879 Td
-(1444 ) 21.8426 Tj
+(1444 holding\(struct spinlock *lock\)) 152.898 Tj
0 -455.6813 Td
-(1445 ) 21.8426 Tj
+(1445 {) 26.2111 Tj
0 -465.1747 Td
-(1446 ) 21.8426 Tj
+(1446 return lock->locked && lock->cpu == cpu\(\) + 10;) 235.8998 Tj
0 -474.668 Td
-(1447 ) 21.8426 Tj
+(1447 }) 26.2111 Tj
0 -484.1614 Td
(1448 ) 21.8426 Tj
0 -493.6547 Td
@@ -7597,7 +7654,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/spinlock.c Page 3) 179.1091 Tj
+(Aug 8 01:04 2009 xv6/spinlock.c Page 3) 179.1091 Tj
0 -28.4801 Td
(1450 // Pushcli/popcli are like cli/sti except that they are ma\
tched:) 301.4275 Tj
@@ -7619,13 +7676,13 @@ rrupts) 301.4275 Tj
0 -104.427 Td
(1458 ) 21.8426 Tj
0 -113.9203 Td
-(1459 eflags = read_eflags\(\);) 131.0554 Tj
+(1459 eflags = readeflags\(\);) 126.6869 Tj
0 -123.4137 Td
(1460 cli\(\);) 56.7907 Tj
0 -132.9071 Td
-(1461 if\(cpus[cpu\(\)].ncli++ == 0\)) 148.5295 Tj
+(1461 if\(c->ncli++ == 0\)) 109.2129 Tj
0 -142.4004 Td
-(1462 cpus[cpu\(\)].intena = eflags & FL_IF;) 196.5831 Tj
+(1462 c->intena = eflags & FL_IF;) 157.2665 Tj
0 -151.8938 Td
(1463 }) 26.2111 Tj
0 -161.3871 Td
@@ -7637,15 +7694,15 @@ rrupts) 301.4275 Tj
0 -189.8672 Td
(1467 {) 26.2111 Tj
0 -199.3606 Td
-(1468 if\(read_eflags\(\)&FL_IF\)) 131.0554 Tj
+(1468 if\(readeflags\(\)&FL_IF\)) 126.6869 Tj
0 -208.8539 Td
(1469 panic\("popcli - interruptible"\);) 179.1091 Tj
0 -218.3473 Td
-(1470 if\(--cpus[cpu\(\)].ncli < 0\)) 144.161 Tj
+(1470 if\(--c->ncli < 0\)) 104.8443 Tj
0 -227.8407 Td
(1471 panic\("popcli"\);) 109.2129 Tj
0 -237.334 Td
-(1472 if\(cpus[cpu\(\)].ncli == 0 && cpus[cpu\(\)].intena\)) 235.8998 Tj
+(1472 if\(c->ncli == 0 && c->intena\)) 157.2665 Tj
0 -246.8274 Td
(1473 sti\(\);) 65.5277 Tj
0 -256.3207 Td
@@ -7730,6 +7787,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -7747,63 +7806,65 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/proc.h Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.h Page 1) 161.635 Tj
0 -28.4801 Td
-(1500 // Segments in proc->gdt) 126.6869 Tj
+(1500 // Segments in proc->gdt.) 131.0554 Tj
0 -37.9735 Td
-(1501 #define SEG_KCODE 1 // kernel code) 174.7406 Tj
+(1501 // Also known to bootasm.S and trapasm.S) 196.5831 Tj
0 -47.4668 Td
-(1502 #define SEG_KDATA 2 // kernel data+stack) 200.9517 Tj
+(1502 #define SEG_KCODE 1 // kernel code) 174.7406 Tj
0 -56.9602 Td
-(1503 #define SEG_UCODE 3) 104.8443 Tj
+(1503 #define SEG_KDATA 2 // kernel data+stack) 200.9517 Tj
0 -66.4535 Td
-(1504 #define SEG_UDATA 4) 104.8443 Tj
+(1504 #define SEG_KCPU 3 // kernel per-cpu data) 209.6887 Tj
0 -75.9469 Td
-(1505 #define SEG_TSS 5 // this process's task state) 235.8998 Tj
+(1505 #define SEG_UCODE 4) 104.8443 Tj
0 -85.4403 Td
-(1506 #define NSEGS 6) 104.8443 Tj
+(1506 #define SEG_UDATA 5) 104.8443 Tj
0 -94.9336 Td
-(1507 ) 21.8426 Tj
+(1507 #define SEG_TSS 6 // this process's task state) 235.8998 Tj
0 -104.427 Td
-(1508 // Saved registers for kernel context switches.) 227.1628 Tj
+(1508 #define NSEGS 7) 104.8443 Tj
0 -113.9203 Td
-(1509 // Don't need to save all the %fs etc. segment registers,) 270.8479 Tj
+(1509 ) 21.8426 Tj
0 -123.4137 Td
-(1510 // because they are constant across kernel contexts.) 249.0053 Tj
+(1510 // Saved registers for kernel context switches.) 227.1628 Tj
0 -132.9071 Td
-(1511 // Save all the regular registers so we don't need to care) 275.2164 Tj
+(1511 // Don't need to save all the segment registers \(%cs, etc\
+\),) 279.5849 Tj
0 -142.4004 Td
-(1512 // which are caller save, but not the return register %eax\
-.) 279.5849 Tj
+(1512 // because they are constant across kernel contexts.) 249.0053 Tj
0 -151.8938 Td
-(1513 // \(Not saving %eax just simplifies the switching code.\)) 266.4794 Tj
+(1513 // Don't need to save %eax, %ecx, %edx, because the) 244.6368 Tj
0 -161.3871 Td
-(1514 // The layout of context must match code in swtch.S.) 249.0053 Tj
+(1514 // x86 convention is that the caller has saved them.) 249.0053 Tj
0 -170.8805 Td
-(1515 struct context {) 91.7388 Tj
+(1515 // Contexts are stored at the bottom of the stack they) 257.7424 Tj
0 -180.3739 Td
-(1516 int eip;) 65.5277 Tj
+(1516 // describe; the stack pointer is the address of the conte\
+xt.) 288.322 Tj
0 -189.8672 Td
-(1517 int esp;) 65.5277 Tj
+(1517 // The layout of the context must match the code in swtch.\
+S.) 283.9534 Tj
0 -199.3606 Td
-(1518 int ebx;) 65.5277 Tj
+(1518 struct context {) 91.7388 Tj
0 -208.8539 Td
-(1519 int ecx;) 65.5277 Tj
+(1519 uint edi;) 69.8962 Tj
0 -218.3473 Td
-(1520 int edx;) 65.5277 Tj
+(1520 uint esi;) 69.8962 Tj
0 -227.8407 Td
-(1521 int esi;) 65.5277 Tj
+(1521 uint ebx;) 69.8962 Tj
0 -237.334 Td
-(1522 int edi;) 65.5277 Tj
+(1522 uint ebp;) 69.8962 Tj
0 -246.8274 Td
-(1523 int ebp;) 65.5277 Tj
+(1523 uint eip;) 69.8962 Tj
0 -256.3207 Td
(1524 };) 30.5796 Tj
0 -265.8141 Td
(1525 ) 21.8426 Tj
0 -275.3075 Td
-(1526 enum proc_state { UNUSED, EMBRYO, SLEEPING, RUNNABLE, RUNN\
-ING, ZOMBIE };) 336.3756 Tj
+(1526 enum procstate { UNUSED, EMBRYO, SLEEPING, RUNNABLE, RUNNI\
+NG, ZOMBIE };) 332.0071 Tj
0 -284.8008 Td
(1527 ) 21.8426 Tj
0 -294.2942 Td
@@ -7811,37 +7872,39 @@ ING, ZOMBIE };) 336.3756 Tj
0 -303.7875 Td
(1529 struct proc {) 78.6333 Tj
0 -313.2809 Td
-(1530 char *mem; // Start of process memory \(k\
-ernel address\)) 332.0071 Tj
+(1530 char *mem; // Start of process memory \
+\(kernel address\)) 345.1126 Tj
0 -322.7743 Td
-(1531 uint sz; // Size of process memory \(by\
-tes\)) 288.322 Tj
+(1531 uint sz; // Size of process memory \(\
+bytes\)) 301.4275 Tj
0 -332.2676 Td
-(1532 char *kstack; // Bottom of kernel stack for \
-this process) 327.6386 Tj
+(1532 char *kstack; // Bottom of kernel stack f\
+or this process) 340.7441 Tj
0 -341.761 Td
-(1533 enum proc_state state; // Process state) 214.0572 Tj
+(1533 enum procstate state; // Process state) 222.7942 Tj
0 -351.2543 Td
-(1534 int pid; // Process ID) 200.9517 Tj
+(1534 volatile int pid; // Process ID) 214.0572 Tj
0 -360.7477 Td
-(1535 struct proc *parent; // Parent process) 218.4257 Tj
+(1535 struct proc *parent; // Parent process) 231.5313 Tj
0 -370.2411 Td
-(1536 void *chan; // If non-zero, sleeping on ch\
-an) 283.9534 Tj
+(1536 struct trapframe *tf; // Trap frame for current s\
+yscall) 301.4275 Tj
0 -379.7344 Td
-(1537 int killed; // If non-zero, have been kill\
-ed) 283.9534 Tj
+(1537 struct context *context; // Switch here to run proce\
+ss) 283.9534 Tj
0 -389.2278 Td
-(1538 struct file *ofile[NOFILE]; // Open files) 214.0572 Tj
+(1538 void *chan; // If non-zero, sleeping on\
+ chan) 297.059 Tj
0 -398.7211 Td
-(1539 struct inode *cwd; // Current directory) 231.5313 Tj
+(1539 int killed; // If non-zero, have been k\
+illed) 297.059 Tj
0 -408.2145 Td
-(1540 struct context context; // Switch here to run process) 270.8479 Tj
+(1540 struct file *ofile[NOFILE]; // Open files) 214.0572 Tj
0 -417.7079 Td
-(1541 struct trapframe *tf; // Trap frame for current inte\
-rrupt) 297.059 Tj
+(1541 struct inode *cwd; // Current directory) 244.6368 Tj
0 -427.2012 Td
-(1542 char name[16]; // Process name \(debugging\)) 262.1109 Tj
+(1542 char name[16]; // Process name \(debugging\
+\)) 275.2164 Tj
0 -436.6946 Td
(1543 };) 30.5796 Tj
0 -446.1879 Td
@@ -7874,7 +7937,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:04 2008 xv6/proc.h Page 2) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.h Page 2) 161.635 Tj
0 -28.4801 Td
(1550 // Process memory is laid out contiguously, low addresses \
first:) 301.4275 Tj
@@ -7893,26 +7956,26 @@ first:) 301.4275 Tj
0 -94.9336 Td
(1557 struct cpu {) 74.2647 Tj
0 -104.427 Td
-(1558 uchar apicid; // Local APIC ID) 222.7942 Tj
+(1558 uchar apicid; // Local APIC ID) 227.1628 Tj
0 -113.9203 Td
-(1559 struct proc *curproc; // Process currently running\
-.) 279.5849 Tj
+(1559 struct context *context; // Switch here to enter sch\
+eduler) 301.4275 Tj
0 -123.4137 Td
-(1560 struct context context; // Switch here to enter sche\
-duler) 297.059 Tj
+(1560 struct taskstate ts; // Used by x86 to find stac\
+k for interrupt) 340.7441 Tj
0 -132.9071 Td
-(1561 struct taskstate ts; // Used by x86 to find stack\
- for interrupt) 336.3756 Tj
+(1561 struct segdesc gdt[NSEGS]; // x86 global descriptor ta\
+ble) 288.322 Tj
0 -142.4004 Td
-(1562 struct segdesc gdt[NSEGS]; // x86 global descriptor tab\
-le) 283.9534 Tj
+(1562 volatile uint booted; // Has the CPU started?) 257.7424 Tj
0 -151.8938 Td
-(1563 volatile uint booted; // Has the CPU started?) 257.7424 Tj
+(1563 int ncli; // Depth of pushcli nesting\
+.) 279.5849 Tj
0 -161.3871 Td
-(1564 int ncli; // Depth of pushcli nesting.) 275.2164 Tj
+(1564 int intena; // Were interrupts enabled \
+before pushcli?) 340.7441 Tj
0 -170.8805 Td
-(1565 int intena; // Were interrupts enabled b\
-efore pushcli?) 336.3756 Tj
+(1565 void *tls[2];) 87.3703 Tj
0 -180.3739 Td
(1566 };) 30.5796 Tj
0 -189.8672 Td
@@ -7924,21 +7987,24 @@ efore pushcli?) 336.3756 Tj
0 -218.3473 Td
(1570 ) 21.8426 Tj
0 -227.8407 Td
-(1571 // "cp" is a short alias for curproc\(\).) 192.2146 Tj
+(1571 // Per-CPU variables, holding pointers to the) 218.4257 Tj
0 -237.334 Td
-(1572 // It gets used enough to make this worthwhile.) 227.1628 Tj
+(1572 // current cpu and to the current process.) 205.3202 Tj
0 -246.8274 Td
-(1573 #define cp curproc\(\)) 109.2129 Tj
+(1573 // The __thread prefix tells gcc to refer to them in the s\
+egment) 301.4275 Tj
0 -256.3207 Td
-(1574 ) 21.8426 Tj
+(1574 // pointed at by gs; the name __thread derives from the us\
+e) 279.5849 Tj
0 -265.8141 Td
-(1575 ) 21.8426 Tj
+(1575 // of the same mechanism to provide per-thread storage in) 270.8479 Tj
0 -275.3075 Td
-(1576 ) 21.8426 Tj
+(1576 // multithreaded user programs.) 157.2665 Tj
0 -284.8008 Td
-(1577 ) 21.8426 Tj
+(1577 extern __thread struct cpu *c; // This cpu.) 235.8998 Tj
0 -294.2942 Td
-(1578 ) 21.8426 Tj
+(1578 extern __thread struct proc *cp; // Current process on\
+ this cpu.) 318.9016 Tj
0 -303.7875 Td
(1579 ) 21.8426 Tj
0 -313.2809 Td
@@ -8011,6 +8077,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -8028,7 +8096,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 1) 161.635 Tj
0 -28.4801 Td
(1600 #include "types.h") 100.4758 Tj
0 -37.9735 Td
@@ -8046,79 +8114,79 @@ q
0 -94.9336 Td
(1607 ) 21.8426 Tj
0 -104.427 Td
-(1608 struct spinlock proc_table_lock;) 161.635 Tj
+(1608 struct {) 56.7907 Tj
0 -113.9203 Td
-(1609 ) 21.8426 Tj
+(1609 struct spinlock lock;) 122.3184 Tj
0 -123.4137 Td
-(1610 struct proc proc[NPROC];) 126.6869 Tj
+(1610 struct proc proc[NPROC];) 135.4239 Tj
0 -132.9071 Td
-(1611 static struct proc *initproc;) 148.5295 Tj
+(1611 } ptable;) 61.1592 Tj
0 -142.4004 Td
(1612 ) 21.8426 Tj
0 -151.8938 Td
-(1613 int nextpid = 1;) 91.7388 Tj
+(1613 static struct proc *initproc;) 148.5295 Tj
0 -161.3871 Td
-(1614 extern void forkret\(void\);) 135.4239 Tj
+(1614 ) 21.8426 Tj
0 -170.8805 Td
-(1615 extern void forkret1\(struct trapframe*\);) 196.5831 Tj
+(1615 int nextpid = 1;) 91.7388 Tj
0 -180.3739 Td
-(1616 ) 21.8426 Tj
+(1616 extern void forkret\(void\);) 135.4239 Tj
0 -189.8672 Td
-(1617 void) 39.3166 Tj
+(1617 extern void trapret\(void\);) 135.4239 Tj
0 -199.3606 Td
-(1618 pinit\(void\)) 69.8962 Tj
+(1618 ) 21.8426 Tj
0 -208.8539 Td
-(1619 {) 26.2111 Tj
+(1619 void) 39.3166 Tj
0 -218.3473 Td
-(1620 initlock\(&proc_table_lock, "proc_table"\);) 209.6887 Tj
+(1620 pinit\(void\)) 69.8962 Tj
0 -227.8407 Td
-(1621 }) 26.2111 Tj
+(1621 {) 26.2111 Tj
0 -237.334 Td
-(1622 ) 21.8426 Tj
+(1622 initlock\(&ptable.lock, "ptable"\);) 174.7406 Tj
0 -246.8274 Td
-(1623 // Look in the process table for an UNUSED proc.) 231.5313 Tj
+(1623 }) 26.2111 Tj
0 -256.3207 Td
-(1624 // If found, change state to EMBRYO and return it.) 240.2683 Tj
+(1624 ) 21.8426 Tj
0 -265.8141 Td
-(1625 // Otherwise return 0.) 117.9499 Tj
+(1625 ) 21.8426 Tj
0 -275.3075 Td
-(1626 static struct proc*) 104.8443 Tj
+(1626 ) 21.8426 Tj
0 -284.8008 Td
-(1627 allocproc\(void\)) 87.3703 Tj
+(1627 ) 21.8426 Tj
0 -294.2942 Td
-(1628 {) 26.2111 Tj
+(1628 ) 21.8426 Tj
0 -303.7875 Td
-(1629 int i;) 56.7907 Tj
+(1629 ) 21.8426 Tj
0 -313.2809 Td
-(1630 struct proc *p;) 96.1073 Tj
+(1630 ) 21.8426 Tj
0 -322.7743 Td
(1631 ) 21.8426 Tj
0 -332.2676 Td
-(1632 acquire\(&proc_table_lock\);) 144.161 Tj
+(1632 ) 21.8426 Tj
0 -341.761 Td
-(1633 for\(i = 0; i < NPROC; i++\){) 148.5295 Tj
+(1633 ) 21.8426 Tj
0 -351.2543 Td
-(1634 p = &proc[i];) 96.1073 Tj
+(1634 ) 21.8426 Tj
0 -360.7477 Td
-(1635 if\(p->state == UNUSED\){) 139.7925 Tj
+(1635 ) 21.8426 Tj
0 -370.2411 Td
-(1636 p->state = EMBRYO;) 126.6869 Tj
+(1636 ) 21.8426 Tj
0 -379.7344 Td
-(1637 p->pid = nextpid++;) 131.0554 Tj
+(1637 ) 21.8426 Tj
0 -389.2278 Td
-(1638 release\(&proc_table_lock\);) 161.635 Tj
+(1638 ) 21.8426 Tj
0 -398.7211 Td
-(1639 return p;) 87.3703 Tj
+(1639 ) 21.8426 Tj
0 -408.2145 Td
-(1640 }) 43.6851 Tj
+(1640 ) 21.8426 Tj
0 -417.7079 Td
-(1641 }) 34.9481 Tj
+(1641 ) 21.8426 Tj
0 -427.2012 Td
-(1642 release\(&proc_table_lock\);) 144.161 Tj
+(1642 ) 21.8426 Tj
0 -436.6946 Td
-(1643 return 0;) 69.8962 Tj
+(1643 ) 21.8426 Tj
0 -446.1879 Td
-(1644 }) 26.2111 Tj
+(1644 ) 21.8426 Tj
0 -455.6813 Td
(1645 ) 21.8426 Tj
0 -465.1747 Td
@@ -8147,105 +8215,100 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 2) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 2) 161.635 Tj
0 -28.4801 Td
-(1650 // Grow current process's memory by n bytes.) 214.0572 Tj
+(1650 // Print a process listing to console. For debugging.) 257.7424 Tj
0 -37.9735 Td
-(1651 // Return old size on success, -1 on failure.) 218.4257 Tj
+(1651 // Runs when user types ^P on console.) 187.8461 Tj
0 -47.4668 Td
-(1652 int) 34.9481 Tj
+(1652 // No lock to avoid wedging a stuck machine further.) 249.0053 Tj
0 -56.9602 Td
-(1653 growproc\(int n\)) 87.3703 Tj
+(1653 void) 39.3166 Tj
0 -66.4535 Td
-(1654 {) 26.2111 Tj
+(1654 procdump\(void\)) 83.0018 Tj
0 -75.9469 Td
-(1655 char *newmem;) 87.3703 Tj
+(1655 {) 26.2111 Tj
0 -85.4403 Td
-(1656 ) 21.8426 Tj
+(1656 static char *states[] = {) 139.7925 Tj
0 -94.9336 Td
-(1657 newmem = kalloc\(cp->sz + n\);) 152.898 Tj
+(1657 [UNUSED] "unused",) 122.3184 Tj
0 -104.427 Td
-(1658 if\(newmem == 0\)) 96.1073 Tj
+(1658 [EMBRYO] "embryo",) 122.3184 Tj
0 -113.9203 Td
-(1659 return -1;) 83.0018 Tj
+(1659 [SLEEPING] "sleep ",) 122.3184 Tj
0 -123.4137 Td
-(1660 memmove\(newmem, cp->mem, cp->sz\);) 174.7406 Tj
+(1660 [RUNNABLE] "runble",) 122.3184 Tj
0 -132.9071 Td
-(1661 memset\(newmem + cp->sz, 0, n\);) 161.635 Tj
+(1661 [RUNNING] "run ",) 122.3184 Tj
0 -142.4004 Td
-(1662 kfree\(cp->mem, cp->sz\);) 131.0554 Tj
+(1662 [ZOMBIE] "zombie") 117.9499 Tj
0 -151.8938 Td
-(1663 cp->mem = newmem;) 104.8443 Tj
+(1663 };) 39.3166 Tj
0 -161.3871 Td
-(1664 cp->sz += n;) 83.0018 Tj
+(1664 int i;) 56.7907 Tj
0 -170.8805 Td
-(1665 setupsegs\(cp\);) 91.7388 Tj
+(1665 struct proc *p;) 96.1073 Tj
0 -180.3739 Td
-(1666 return cp->sz - n;) 109.2129 Tj
+(1666 char *state;) 83.0018 Tj
0 -189.8672 Td
-(1667 }) 26.2111 Tj
+(1667 uint pc[10];) 83.0018 Tj
0 -199.3606 Td
(1668 ) 21.8426 Tj
0 -208.8539 Td
-(1669 // Set up CPU's segment descriptors and task state for a g\
-iven process.) 332.0071 Tj
+(1669 for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\){) 253.3738 Tj
0 -218.3473 Td
-(1670 // If p==0, set up for "idle" state for when scheduler\(\)\
- is running.) 318.9016 Tj
+(1670 if\(p->state == UNUSED\)) 135.4239 Tj
0 -227.8407 Td
-(1671 void) 39.3166 Tj
+(1671 continue;) 87.3703 Tj
0 -237.334 Td
-(1672 setupsegs\(struct proc *p\)) 131.0554 Tj
+(1672 if\(p->state >= 0 && p->state < NELEM\(states\) && sta\
+tes[p->state]\)) 323.2701 Tj
0 -246.8274 Td
-(1673 {) 26.2111 Tj
+(1673 state = states[p->state];) 157.2665 Tj
0 -256.3207 Td
-(1674 struct cpu *c;) 91.7388 Tj
+(1674 else) 56.7907 Tj
0 -265.8141 Td
-(1675 ) 21.8426 Tj
+(1675 state = "???";) 109.2129 Tj
0 -275.3075 Td
-(1676 pushcli\(\);) 74.2647 Tj
+(1676 cprintf\("%d %s %s", p->pid, state, p->name\);) 231.5313 Tj
0 -284.8008 Td
-(1677 c = &cpus[cpu\(\)];) 104.8443 Tj
+(1677 if\(p->state == SLEEPING\){) 148.5295 Tj
0 -294.2942 Td
-(1678 c->ts.ss0 = SEG_KDATA << 3;) 148.5295 Tj
+(1678 getcallerpcs\(\(uint*\)p->context->ebp+2, pc\);) 235.8998 Tj
0 -303.7875 Td
-(1679 if\(p\)) 52.4222 Tj
+(1679 for\(i=0; i<10 && pc[i] != 0; i++\)) 192.2146 Tj
0 -313.2809 Td
-(1680 c->ts.esp0 = \(uint\)\(p->kstack + KSTACKSIZE\);) 231.5313 Tj
+(1680 cprintf\(" %p", pc[i]\);) 152.898 Tj
0 -322.7743 Td
-(1681 else) 48.0537 Tj
+(1681 }) 43.6851 Tj
0 -332.2676 Td
-(1682 c->ts.esp0 = 0xffffffff;) 144.161 Tj
+(1682 cprintf\("\\n"\);) 100.4758 Tj
0 -341.761 Td
-(1683 ) 21.8426 Tj
+(1683 }) 34.9481 Tj
0 -351.2543 Td
-(1684 c->gdt[0] = SEG_NULL;) 122.3184 Tj
+(1684 }) 26.2111 Tj
0 -360.7477 Td
-(1685 c->gdt[SEG_KCODE] = SEG\(STA_X|STA_R, 0, 0x100000 + 64*1\
-024-1, 0\);) 314.533 Tj
+(1685 ) 21.8426 Tj
0 -370.2411 Td
-(1686 c->gdt[SEG_KDATA] = SEG\(STA_W, 0, 0xffffffff, 0\);) 244.6368 Tj
+(1686 ) 21.8426 Tj
0 -379.7344 Td
-(1687 c->gdt[SEG_TSS] = SEG16\(STS_T32A, \(uint\)&c->ts, sizeo\
-f\(c->ts\)-1, 0\);) 327.6386 Tj
+(1687 ) 21.8426 Tj
0 -389.2278 Td
-(1688 c->gdt[SEG_TSS].s = 0;) 126.6869 Tj
+(1688 ) 21.8426 Tj
0 -398.7211 Td
-(1689 if\(p\){) 56.7907 Tj
+(1689 ) 21.8426 Tj
0 -408.2145 Td
-(1690 c->gdt[SEG_UCODE] = SEG\(STA_X|STA_R, \(uint\)p->mem, \
-p->sz-1, DPL_USER\);) 345.1126 Tj
+(1690 ) 21.8426 Tj
0 -417.7079 Td
-(1691 c->gdt[SEG_UDATA] = SEG\(STA_W, \(uint\)p->mem, p->sz-\
-1, DPL_USER\);) 318.9016 Tj
+(1691 ) 21.8426 Tj
0 -427.2012 Td
-(1692 } else {) 65.5277 Tj
+(1692 ) 21.8426 Tj
0 -436.6946 Td
-(1693 c->gdt[SEG_UCODE] = SEG_NULL;) 166.0035 Tj
+(1693 ) 21.8426 Tj
0 -446.1879 Td
-(1694 c->gdt[SEG_UDATA] = SEG_NULL;) 166.0035 Tj
+(1694 ) 21.8426 Tj
0 -455.6813 Td
-(1695 }) 34.9481 Tj
+(1695 ) 21.8426 Tj
0 -465.1747 Td
(1696 ) 21.8426 Tj
0 -474.668 Td
@@ -8284,6 +8347,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -8301,107 +8366,112 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 3) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 3) 161.635 Tj
0 -28.4801 Td
-(1700 lgdt\(c->gdt, sizeof\(c->gdt\)\);) 157.2665 Tj
+(1700 // Set up CPU's kernel segment descriptors.) 209.6887 Tj
0 -37.9735 Td
-(1701 ltr\(SEG_TSS << 3\);) 109.2129 Tj
+(1701 // Run once at boot time on each CPU.) 183.4776 Tj
0 -47.4668 Td
-(1702 popcli\(\);) 69.8962 Tj
+(1702 void) 39.3166 Tj
0 -56.9602 Td
-(1703 }) 26.2111 Tj
+(1703 ksegment\(void\)) 83.0018 Tj
0 -66.4535 Td
-(1704 ) 21.8426 Tj
+(1704 {) 26.2111 Tj
0 -75.9469 Td
-(1705 // Create a new process copying p as the parent.) 231.5313 Tj
+(1705 struct cpu *c1;) 96.1073 Tj
0 -85.4403 Td
-(1706 // Sets up stack to return as if from system call.) 240.2683 Tj
+(1706 ) 21.8426 Tj
0 -94.9336 Td
-(1707 // Caller must set state of returned proc to RUNNABLE.) 257.7424 Tj
+(1707 c1 = &cpus[cpu\(\)];) 109.2129 Tj
0 -104.427 Td
-(1708 struct proc*) 74.2647 Tj
+(1708 c1->gdt[SEG_KCODE] = SEG\(STA_X|STA_R, 0, 0x100000 + 64*\
+1024-1, 0\);) 318.9016 Tj
0 -113.9203 Td
-(1709 copyproc\(struct proc *p\)) 126.6869 Tj
+(1709 c1->gdt[SEG_KDATA] = SEG\(STA_W, 0, 0xffffffff, 0\);) 249.0053 Tj
0 -123.4137 Td
-(1710 {) 26.2111 Tj
+(1710 c1->gdt[SEG_KCPU] = SEG\(STA_W, \(uint\)\(&c1->tls+1\), \
+0xffffffff, 0\);) 318.9016 Tj
0 -132.9071 Td
-(1711 int i;) 56.7907 Tj
+(1711 lgdt\(c1->gdt, sizeof\(c1->gdt\)\);) 166.0035 Tj
0 -142.4004 Td
-(1712 struct proc *np;) 100.4758 Tj
+(1712 loadfsgs\(SEG_KCPU << 3\);) 135.4239 Tj
0 -151.8938 Td
(1713 ) 21.8426 Tj
0 -161.3871 Td
-(1714 // Allocate process.) 117.9499 Tj
+(1714 // Initialize cpu-local variables.) 179.1091 Tj
0 -170.8805 Td
-(1715 if\(\(np = allocproc\(\)\) == 0\)) 148.5295 Tj
+(1715 c = c1;) 61.1592 Tj
0 -180.3739 Td
-(1716 return 0;) 78.6333 Tj
+(1716 cp = 0;) 61.1592 Tj
0 -189.8672 Td
-(1717 ) 21.8426 Tj
+(1717 }) 26.2111 Tj
0 -199.3606 Td
-(1718 // Allocate kernel stack.) 139.7925 Tj
+(1718 ) 21.8426 Tj
0 -208.8539 Td
-(1719 if\(\(np->kstack = kalloc\(KSTACKSIZE\)\) == 0\){) 218.4257 Tj
+(1719 // Set up CPU's segment descriptors and current process ta\
+sk state.) 314.533 Tj
0 -218.3473 Td
-(1720 np->state = UNUSED;) 122.3184 Tj
+(1720 // If cp==0, set up for "idle" state for when scheduler\(\)\
+ is running.) 323.2701 Tj
0 -227.8407 Td
-(1721 return 0;) 78.6333 Tj
+(1721 void) 39.3166 Tj
0 -237.334 Td
-(1722 }) 34.9481 Tj
+(1722 usegment\(void\)) 83.0018 Tj
0 -246.8274 Td
-(1723 np->tf = \(struct trapframe*\)\(np->kstack + KSTACKSIZE\)\
- - 1;) 283.9534 Tj
+(1723 {) 26.2111 Tj
0 -256.3207 Td
-(1724 ) 21.8426 Tj
+(1724 pushcli\(\);) 74.2647 Tj
0 -265.8141 Td
-(1725 if\(p\){ // Copy process state from p.) 192.2146 Tj
+(1725 c->gdt[SEG_UCODE] = SEG\(STA_X|STA_R, \(uint\)cp->mem, c\
+p->sz-1, DPL_USER\);) 345.1126 Tj
0 -275.3075 Td
-(1726 np->parent = p;) 104.8443 Tj
+(1726 c->gdt[SEG_UDATA] = SEG\(STA_W, \(uint\)cp->mem, cp->sz-\
+1, DPL_USER\);) 318.9016 Tj
0 -284.8008 Td
-(1727 memmove\(np->tf, p->tf, sizeof\(*np->tf\)\);) 214.0572 Tj
+(1727 c->gdt[SEG_TSS] = SEG16\(STS_T32A, \(uint\)&c->ts, sizeo\
+f\(c->ts\)-1, 0\);) 327.6386 Tj
0 -294.2942 Td
-(1728 ) 21.8426 Tj
+(1728 c->gdt[SEG_TSS].s = 0;) 126.6869 Tj
0 -303.7875 Td
-(1729 np->sz = p->sz;) 104.8443 Tj
+(1729 c->ts.ss0 = SEG_KDATA << 3;) 148.5295 Tj
0 -313.2809 Td
-(1730 if\(\(np->mem = kalloc\(np->sz\)\) == 0\){) 196.5831 Tj
+(1730 c->ts.esp0 = \(uint\)cp->kstack + KSTACKSIZE;) 218.4257 Tj
0 -322.7743 Td
-(1731 kfree\(np->kstack, KSTACKSIZE\);) 179.1091 Tj
+(1731 ltr\(SEG_TSS << 3\);) 109.2129 Tj
0 -332.2676 Td
-(1732 np->kstack = 0;) 113.5814 Tj
+(1732 popcli\(\);) 69.8962 Tj
0 -341.761 Td
-(1733 np->state = UNUSED;) 131.0554 Tj
+(1733 }) 26.2111 Tj
0 -351.2543 Td
-(1734 np->parent = 0;) 113.5814 Tj
+(1734 ) 21.8426 Tj
0 -360.7477 Td
-(1735 return 0;) 87.3703 Tj
+(1735 ) 21.8426 Tj
0 -370.2411 Td
-(1736 }) 43.6851 Tj
+(1736 ) 21.8426 Tj
0 -379.7344 Td
-(1737 memmove\(np->mem, p->mem, np->sz\);) 183.4776 Tj
+(1737 ) 21.8426 Tj
0 -389.2278 Td
(1738 ) 21.8426 Tj
0 -398.7211 Td
-(1739 for\(i = 0; i < NOFILE; i++\)) 157.2665 Tj
+(1739 ) 21.8426 Tj
0 -408.2145 Td
-(1740 if\(p->ofile[i]\)) 113.5814 Tj
+(1740 ) 21.8426 Tj
0 -417.7079 Td
-(1741 np->ofile[i] = filedup\(p->ofile[i]\);) 214.0572 Tj
+(1741 ) 21.8426 Tj
0 -427.2012 Td
-(1742 np->cwd = idup\(p->cwd\);) 139.7925 Tj
+(1742 ) 21.8426 Tj
0 -436.6946 Td
-(1743 }) 34.9481 Tj
+(1743 ) 21.8426 Tj
0 -446.1879 Td
(1744 ) 21.8426 Tj
0 -455.6813 Td
-(1745 // Set up new context to start executing at forkret \(se\
-e below\).) 310.1645 Tj
+(1745 ) 21.8426 Tj
0 -465.1747 Td
-(1746 memset\(&np->context, 0, sizeof\(np->context\)\);) 227.1628 Tj
+(1746 ) 21.8426 Tj
0 -474.668 Td
-(1747 np->context.eip = \(uint\)forkret;) 170.3721 Tj
+(1747 ) 21.8426 Tj
0 -484.1614 Td
-(1748 np->context.esp = \(uint\)np->tf;) 166.0035 Tj
+(1748 ) 21.8426 Tj
0 -493.6547 Td
(1749 ) 21.8426 Tj
0 -522.1348 Td
@@ -8422,107 +8492,103 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 4) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 4) 161.635 Tj
0 -28.4801 Td
-(1750 // Clear %eax so that fork system call returns 0 in chil\
-d.) 283.9534 Tj
+(1750 // Look in the process table for an UNUSED proc.) 231.5313 Tj
0 -37.9735 Td
-(1751 np->tf->eax = 0;) 100.4758 Tj
+(1751 // If found, change state to EMBRYO and return it.) 240.2683 Tj
0 -47.4668 Td
-(1752 return np;) 74.2647 Tj
+(1752 // Otherwise return 0.) 117.9499 Tj
0 -56.9602 Td
-(1753 }) 26.2111 Tj
+(1753 static struct proc*) 104.8443 Tj
0 -66.4535 Td
-(1754 ) 21.8426 Tj
+(1754 allocproc\(void\)) 87.3703 Tj
0 -75.9469 Td
-(1755 // Set up first user process.) 148.5295 Tj
+(1755 {) 26.2111 Tj
0 -85.4403 Td
-(1756 void) 39.3166 Tj
+(1756 struct proc *p;) 96.1073 Tj
0 -94.9336 Td
-(1757 userinit\(void\)) 83.0018 Tj
+(1757 char *sp;) 69.8962 Tj
0 -104.427 Td
-(1758 {) 26.2111 Tj
+(1758 ) 21.8426 Tj
0 -113.9203 Td
-(1759 struct proc *p;) 96.1073 Tj
+(1759 acquire\(&ptable.lock\);) 126.6869 Tj
0 -123.4137 Td
-(1760 extern uchar _binary_initcode_start[], _binary_initcode_\
-size[];) 305.796 Tj
+(1760 for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\)) 249.0053 Tj
0 -132.9071 Td
-(1761 ) 21.8426 Tj
+(1761 if\(p->state == UNUSED\)) 135.4239 Tj
0 -142.4004 Td
-(1762 p = copyproc\(0\);) 100.4758 Tj
+(1762 goto found;) 96.1073 Tj
0 -151.8938 Td
-(1763 p->sz = PAGE;) 87.3703 Tj
+(1763 release\(&ptable.lock\);) 126.6869 Tj
0 -161.3871 Td
-(1764 p->mem = kalloc\(p->sz\);) 131.0554 Tj
+(1764 return 0;) 69.8962 Tj
0 -170.8805 Td
-(1765 p->cwd = namei\("/"\);) 117.9499 Tj
+(1765 ) 21.8426 Tj
0 -180.3739 Td
-(1766 memset\(p->tf, 0, sizeof\(*p->tf\)\);) 174.7406 Tj
+(1766 found:) 48.0537 Tj
0 -189.8672 Td
-(1767 p->tf->cs = \(SEG_UCODE << 3\) | DPL_USER;) 205.3202 Tj
+(1767 p->state = EMBRYO;) 109.2129 Tj
0 -199.3606 Td
-(1768 p->tf->ds = \(SEG_UDATA << 3\) | DPL_USER;) 205.3202 Tj
+(1768 p->pid = nextpid++;) 113.5814 Tj
0 -208.8539 Td
-(1769 p->tf->es = p->tf->ds;) 126.6869 Tj
+(1769 release\(&ptable.lock\);) 126.6869 Tj
0 -218.3473 Td
-(1770 p->tf->ss = p->tf->ds;) 126.6869 Tj
+(1770 ) 21.8426 Tj
0 -227.8407 Td
-(1771 p->tf->eflags = FL_IF;) 126.6869 Tj
+(1771 // Allocate kernel stack if necessary.) 196.5831 Tj
0 -237.334 Td
-(1772 p->tf->esp = p->sz;) 113.5814 Tj
+(1772 if\(\(p->kstack = kalloc\(KSTACKSIZE\)\) == 0\){) 214.0572 Tj
0 -246.8274 Td
-(1773 ) 21.8426 Tj
+(1773 p->state = UNUSED;) 117.9499 Tj
0 -256.3207 Td
-(1774 // Make return address readable; needed for some gcc.) 262.1109 Tj
+(1774 return 0;) 78.6333 Tj
0 -265.8141 Td
-(1775 p->tf->esp -= 4;) 100.4758 Tj
+(1775 }) 34.9481 Tj
0 -275.3075 Td
-(1776 *\(uint*\)\(p->mem + p->tf->esp\) = 0xefefefef;) 218.4257 Tj
+(1776 sp = p->kstack + KSTACKSIZE;) 152.898 Tj
0 -284.8008 Td
(1777 ) 21.8426 Tj
0 -294.2942 Td
-(1778 // On entry to user space, start executing at beginning \
-of initcode.S.) 336.3756 Tj
+(1778 // Leave room for trap frame.) 157.2665 Tj
0 -303.7875 Td
-(1779 p->tf->eip = 0;) 96.1073 Tj
+(1779 sp -= sizeof *p->tf;) 117.9499 Tj
0 -313.2809 Td
-(1780 memmove\(p->mem, _binary_initcode_start, \(int\)_binary_\
-initcode_size\);) 327.6386 Tj
+(1780 p->tf = \(struct trapframe*\)sp;) 161.635 Tj
0 -322.7743 Td
-(1781 safestrcpy\(p->name, "initcode", sizeof\(p->name\)\);) 244.6368 Tj
+(1781 ) 21.8426 Tj
0 -332.2676 Td
-(1782 p->state = RUNNABLE;) 117.9499 Tj
+(1782 // Set up new context to start executing at forkret,) 257.7424 Tj
0 -341.761 Td
-(1783 ) 21.8426 Tj
+(1783 // which returns to trapret \(see below\).) 205.3202 Tj
0 -351.2543 Td
-(1784 initproc = p;) 87.3703 Tj
+(1784 sp -= 4;) 65.5277 Tj
0 -360.7477 Td
-(1785 }) 26.2111 Tj
+(1785 *\(uint*\)sp = \(uint\)trapret;) 148.5295 Tj
0 -370.2411 Td
(1786 ) 21.8426 Tj
0 -379.7344 Td
-(1787 // Return currently running process.) 179.1091 Tj
+(1787 sp -= sizeof *p->context;) 139.7925 Tj
0 -389.2278 Td
-(1788 struct proc*) 74.2647 Tj
+(1788 p->context = \(struct context*\)sp;) 174.7406 Tj
0 -398.7211 Td
-(1789 curproc\(void\)) 78.6333 Tj
+(1789 memset\(p->context, 0, sizeof *p->context\);) 214.0572 Tj
0 -408.2145 Td
-(1790 {) 26.2111 Tj
+(1790 p->context->eip = \(uint\)forkret;) 170.3721 Tj
0 -417.7079 Td
-(1791 struct proc *p;) 96.1073 Tj
+(1791 return p;) 69.8962 Tj
0 -427.2012 Td
-(1792 ) 21.8426 Tj
+(1792 }) 26.2111 Tj
0 -436.6946 Td
-(1793 pushcli\(\);) 74.2647 Tj
+(1793 ) 21.8426 Tj
0 -446.1879 Td
-(1794 p = cpus[cpu\(\)].curproc;) 135.4239 Tj
+(1794 ) 21.8426 Tj
0 -455.6813 Td
-(1795 popcli\(\);) 69.8962 Tj
+(1795 ) 21.8426 Tj
0 -465.1747 Td
-(1796 return p;) 69.8962 Tj
+(1796 ) 21.8426 Tj
0 -474.668 Td
-(1797 }) 26.2111 Tj
+(1797 ) 21.8426 Tj
0 -484.1614 Td
(1798 ) 21.8426 Tj
0 -493.6547 Td
@@ -8557,6 +8623,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -8574,107 +8642,107 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 5) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 5) 161.635 Tj
0 -28.4801 Td
-(1800 // Per-CPU process scheduler.) 148.5295 Tj
+(1800 // Set up first user process.) 148.5295 Tj
0 -37.9735 Td
-(1801 // Each CPU calls scheduler\(\) after setting itself up.) 257.7424 Tj
+(1801 void) 39.3166 Tj
0 -47.4668 Td
-(1802 // Scheduler never returns. It loops, doing:) 218.4257 Tj
+(1802 userinit\(void\)) 83.0018 Tj
0 -56.9602 Td
-(1803 // - choose a process to run) 148.5295 Tj
+(1803 {) 26.2111 Tj
0 -66.4535 Td
-(1804 // - swtch to start running that process) 200.9517 Tj
+(1804 struct proc *p;) 96.1073 Tj
0 -75.9469 Td
-(1805 // - eventually that process transfers control) 227.1628 Tj
+(1805 extern char _binary_initcode_start[], _binary_initcode_s\
+ize[];) 301.4275 Tj
0 -85.4403 Td
-(1806 // via swtch back to the scheduler.) 196.5831 Tj
+(1806 ) 21.8426 Tj
0 -94.9336 Td
-(1807 void) 39.3166 Tj
+(1807 p = allocproc\(\);) 100.4758 Tj
0 -104.427 Td
-(1808 scheduler\(void\)) 87.3703 Tj
+(1808 initproc = p;) 87.3703 Tj
0 -113.9203 Td
-(1809 {) 26.2111 Tj
+(1809 ) 21.8426 Tj
0 -123.4137 Td
-(1810 struct proc *p;) 96.1073 Tj
+(1810 // Initialize memory from initcode.S) 187.8461 Tj
0 -132.9071 Td
-(1811 struct cpu *c;) 91.7388 Tj
+(1811 p->sz = PAGE;) 87.3703 Tj
0 -142.4004 Td
-(1812 int i;) 56.7907 Tj
+(1812 p->mem = kalloc\(p->sz\);) 131.0554 Tj
0 -151.8938 Td
-(1813 ) 21.8426 Tj
+(1813 memset\(p->mem, 0, p->sz\);) 139.7925 Tj
0 -161.3871 Td
-(1814 c = &cpus[cpu\(\)];) 104.8443 Tj
+(1814 memmove\(p->mem, _binary_initcode_start, \(int\)_binary_\
+initcode_size\);) 327.6386 Tj
0 -170.8805 Td
-(1815 for\(;;\){) 65.5277 Tj
+(1815 ) 21.8426 Tj
0 -180.3739 Td
-(1816 // Enable interrupts on this processor.) 209.6887 Tj
+(1816 memset\(p->tf, 0, sizeof\(*p->tf\)\);) 174.7406 Tj
0 -189.8672 Td
-(1817 sti\(\);) 65.5277 Tj
+(1817 p->tf->cs = \(SEG_UCODE << 3\) | DPL_USER;) 205.3202 Tj
0 -199.3606 Td
-(1818 ) 21.8426 Tj
+(1818 p->tf->ds = \(SEG_UDATA << 3\) | DPL_USER;) 205.3202 Tj
0 -208.8539 Td
-(1819 // Loop over process table looking for process to run.) 275.2164 Tj
+(1819 p->tf->es = p->tf->ds;) 126.6869 Tj
0 -218.3473 Td
-(1820 acquire\(&proc_table_lock\);) 152.898 Tj
+(1820 p->tf->ss = p->tf->ds;) 126.6869 Tj
0 -227.8407 Td
-(1821 for\(i = 0; i < NPROC; i++\){) 157.2665 Tj
+(1821 p->tf->eflags = FL_IF;) 126.6869 Tj
0 -237.334 Td
-(1822 p = &proc[i];) 104.8443 Tj
+(1822 p->tf->esp = p->sz;) 113.5814 Tj
0 -246.8274 Td
-(1823 if\(p->state != RUNNABLE\)) 152.898 Tj
+(1823 p->tf->eip = 0; // beginning of initcode.S) 218.4257 Tj
0 -256.3207 Td
-(1824 continue;) 96.1073 Tj
+(1824 ) 21.8426 Tj
0 -265.8141 Td
-(1825 ) 21.8426 Tj
+(1825 safestrcpy\(p->name, "initcode", sizeof\(p->name\)\);) 244.6368 Tj
0 -275.3075 Td
-(1826 // Switch to chosen process. It is the process's jo\
-b) 279.5849 Tj
+(1826 p->cwd = namei\("/"\);) 117.9499 Tj
0 -284.8008 Td
-(1827 // to release proc_table_lock and then reacquire it) 270.8479 Tj
+(1827 ) 21.8426 Tj
0 -294.2942 Td
-(1828 // before jumping back to us.) 174.7406 Tj
+(1828 p->state = RUNNABLE;) 117.9499 Tj
0 -303.7875 Td
-(1829 c->curproc = p;) 113.5814 Tj
+(1829 }) 26.2111 Tj
0 -313.2809 Td
-(1830 setupsegs\(p\);) 104.8443 Tj
+(1830 ) 21.8426 Tj
0 -322.7743 Td
-(1831 p->state = RUNNING;) 131.0554 Tj
+(1831 // Grow current process's memory by n bytes.) 214.0572 Tj
0 -332.2676 Td
-(1832 swtch\(&c->context, &p->context\);) 187.8461 Tj
+(1832 // Return 0 on success, -1 on failure.) 187.8461 Tj
0 -341.761 Td
-(1833 ) 21.8426 Tj
+(1833 int) 34.9481 Tj
0 -351.2543 Td
-(1834 // Process is done running for now.) 200.9517 Tj
+(1834 growproc\(int n\)) 87.3703 Tj
0 -360.7477 Td
-(1835 // It should have changed its p->state before coming\
- back.) 301.4275 Tj
+(1835 {) 26.2111 Tj
0 -370.2411 Td
-(1836 c->curproc = 0;) 113.5814 Tj
+(1836 char *newmem;) 87.3703 Tj
0 -379.7344 Td
-(1837 setupsegs\(0\);) 104.8443 Tj
+(1837 ) 21.8426 Tj
0 -389.2278 Td
-(1838 }) 43.6851 Tj
+(1838 newmem = kalloc\(cp->sz + n\);) 152.898 Tj
0 -398.7211 Td
-(1839 release\(&proc_table_lock\);) 152.898 Tj
+(1839 if\(newmem == 0\)) 96.1073 Tj
0 -408.2145 Td
-(1840 ) 21.8426 Tj
+(1840 return -1;) 83.0018 Tj
0 -417.7079 Td
-(1841 }) 34.9481 Tj
+(1841 memmove\(newmem, cp->mem, cp->sz\);) 174.7406 Tj
0 -427.2012 Td
-(1842 }) 26.2111 Tj
+(1842 memset\(newmem + cp->sz, 0, n\);) 161.635 Tj
0 -436.6946 Td
-(1843 ) 21.8426 Tj
+(1843 kfree\(cp->mem, cp->sz\);) 131.0554 Tj
0 -446.1879 Td
-(1844 ) 21.8426 Tj
+(1844 cp->mem = newmem;) 104.8443 Tj
0 -455.6813 Td
-(1845 ) 21.8426 Tj
+(1845 cp->sz += n;) 83.0018 Tj
0 -465.1747 Td
-(1846 ) 21.8426 Tj
+(1846 usegment\(\);) 78.6333 Tj
0 -474.668 Td
-(1847 ) 21.8426 Tj
+(1847 return 0;) 69.8962 Tj
0 -484.1614 Td
-(1848 ) 21.8426 Tj
+(1848 }) 26.2111 Tj
0 -493.6547 Td
(1849 ) 21.8426 Tj
0 -522.1348 Td
@@ -8695,81 +8763,81 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 6) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 6) 161.635 Tj
0 -28.4801 Td
-(1850 // Enter scheduler. Must already hold proc_table_lock) 257.7424 Tj
+(1850 // Create a new process copying p as the parent.) 231.5313 Tj
0 -37.9735 Td
-(1851 // and have changed curproc[cpu\(\)]->state.) 205.3202 Tj
+(1851 // Sets up stack to return as if from system call.) 240.2683 Tj
0 -47.4668 Td
-(1852 void) 39.3166 Tj
+(1852 // Caller must set state of returned proc to RUNNABLE.) 257.7424 Tj
0 -56.9602 Td
-(1853 sched\(void\)) 69.8962 Tj
+(1853 int) 34.9481 Tj
0 -66.4535 Td
-(1854 {) 26.2111 Tj
+(1854 fork\(void\)) 65.5277 Tj
0 -75.9469 Td
-(1855 if\(read_eflags\(\)&FL_IF\)) 131.0554 Tj
+(1855 {) 26.2111 Tj
0 -85.4403 Td
-(1856 panic\("sched interruptible"\);) 166.0035 Tj
+(1856 int i, pid;) 78.6333 Tj
0 -94.9336 Td
-(1857 if\(cp->state == RUNNING\)) 135.4239 Tj
+(1857 struct proc *np;) 100.4758 Tj
0 -104.427 Td
-(1858 panic\("sched running"\);) 139.7925 Tj
+(1858 ) 21.8426 Tj
0 -113.9203 Td
-(1859 if\(!holding\(&proc_table_lock\)\)) 161.635 Tj
+(1859 // Allocate process.) 117.9499 Tj
0 -123.4137 Td
-(1860 panic\("sched proc_table_lock"\);) 174.7406 Tj
+(1860 if\(\(np = allocproc\(\)\) == 0\)) 148.5295 Tj
0 -132.9071 Td
-(1861 if\(cpus[cpu\(\)].ncli != 1\)) 139.7925 Tj
+(1861 return -1;) 83.0018 Tj
0 -142.4004 Td
-(1862 panic\("sched locks"\);) 131.0554 Tj
+(1862 ) 21.8426 Tj
0 -151.8938 Td
-(1863 ) 21.8426 Tj
+(1863 // Copy process state from p.) 157.2665 Tj
0 -161.3871 Td
-(1864 swtch\(&cp->context, &cpus[cpu\(\)].context\);) 214.0572 Tj
+(1864 np->sz = cp->sz;) 100.4758 Tj
0 -170.8805 Td
-(1865 }) 26.2111 Tj
+(1865 if\(\(np->mem = kalloc\(np->sz\)\) == 0\){) 187.8461 Tj
0 -180.3739 Td
-(1866 ) 21.8426 Tj
+(1866 kfree\(np->kstack, KSTACKSIZE\);) 170.3721 Tj
0 -189.8672 Td
-(1867 // Give up the CPU for one scheduling round.) 214.0572 Tj
+(1867 np->kstack = 0;) 104.8443 Tj
0 -199.3606 Td
-(1868 void) 39.3166 Tj
+(1868 np->state = UNUSED;) 122.3184 Tj
0 -208.8539 Td
-(1869 yield\(void\)) 69.8962 Tj
+(1869 return -1;) 83.0018 Tj
0 -218.3473 Td
-(1870 {) 26.2111 Tj
+(1870 }) 34.9481 Tj
0 -227.8407 Td
-(1871 acquire\(&proc_table_lock\);) 144.161 Tj
+(1871 memmove\(np->mem, cp->mem, np->sz\);) 179.1091 Tj
0 -237.334 Td
-(1872 cp->state = RUNNABLE;) 122.3184 Tj
+(1872 np->parent = cp;) 100.4758 Tj
0 -246.8274 Td
-(1873 sched\(\);) 65.5277 Tj
+(1873 *np->tf = *cp->tf;) 109.2129 Tj
0 -256.3207 Td
-(1874 release\(&proc_table_lock\);) 144.161 Tj
+(1874 ) 21.8426 Tj
0 -265.8141 Td
-(1875 }) 26.2111 Tj
+(1875 // Clear %eax so that fork returns 0 in the child.) 249.0053 Tj
0 -275.3075 Td
-(1876 ) 21.8426 Tj
+(1876 np->tf->eax = 0;) 100.4758 Tj
0 -284.8008 Td
-(1877 // A fork child's very first scheduling by scheduler\(\)) 257.7424 Tj
+(1877 ) 21.8426 Tj
0 -294.2942 Td
-(1878 // will swtch here. "Return" to user space.) 214.0572 Tj
+(1878 for\(i = 0; i < NOFILE; i++\)) 148.5295 Tj
0 -303.7875 Td
-(1879 void) 39.3166 Tj
+(1879 if\(cp->ofile[i]\)) 109.2129 Tj
0 -313.2809 Td
-(1880 forkret\(void\)) 78.6333 Tj
+(1880 np->ofile[i] = filedup\(cp->ofile[i]\);) 209.6887 Tj
0 -322.7743 Td
-(1881 {) 26.2111 Tj
+(1881 np->cwd = idup\(cp->cwd\);) 135.4239 Tj
0 -332.2676 Td
-(1882 // Still holding proc_table_lock from scheduler.) 240.2683 Tj
+(1882 ) 21.8426 Tj
0 -341.761 Td
-(1883 release\(&proc_table_lock\);) 144.161 Tj
+(1883 pid = np->pid;) 91.7388 Tj
0 -351.2543 Td
-(1884 ) 21.8426 Tj
+(1884 np->state = RUNNABLE;) 122.3184 Tj
0 -360.7477 Td
-(1885 // Jump into assembly, never to return.) 200.9517 Tj
+(1885 ) 21.8426 Tj
0 -370.2411 Td
-(1886 forkret1\(cp->tf\);) 104.8443 Tj
+(1886 return pid;) 78.6333 Tj
0 -379.7344 Td
(1887 }) 26.2111 Tj
0 -389.2278 Td
@@ -8826,6 +8894,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -8843,83 +8913,85 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 7) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 7) 161.635 Tj
0 -28.4801 Td
-(1900 // Atomically release lock and sleep on chan.) 218.4257 Tj
+(1900 // Per-CPU process scheduler.) 148.5295 Tj
0 -37.9735 Td
-(1901 // Reacquires lock when reawakened.) 174.7406 Tj
+(1901 // Each CPU calls scheduler\(\) after setting itself up.) 257.7424 Tj
0 -47.4668 Td
-(1902 void) 39.3166 Tj
+(1902 // Scheduler never returns. It loops, doing:) 218.4257 Tj
0 -56.9602 Td
-(1903 sleep\(void *chan, struct spinlock *lk\)) 187.8461 Tj
+(1903 // - choose a process to run) 148.5295 Tj
0 -66.4535 Td
-(1904 {) 26.2111 Tj
+(1904 // - swtch to start running that process) 200.9517 Tj
0 -75.9469 Td
-(1905 if\(cp == 0\)) 78.6333 Tj
+(1905 // - eventually that process transfers control) 227.1628 Tj
0 -85.4403 Td
-(1906 panic\("sleep"\);) 104.8443 Tj
+(1906 // via swtch back to the scheduler.) 196.5831 Tj
0 -94.9336 Td
-(1907 ) 21.8426 Tj
+(1907 void) 39.3166 Tj
0 -104.427 Td
-(1908 if\(lk == 0\)) 78.6333 Tj
+(1908 scheduler\(void\)) 87.3703 Tj
0 -113.9203 Td
-(1909 panic\("sleep without lk"\);) 152.898 Tj
+(1909 {) 26.2111 Tj
0 -123.4137 Td
-(1910 ) 21.8426 Tj
+(1910 struct proc *p;) 96.1073 Tj
0 -132.9071 Td
-(1911 // Must acquire proc_table_lock in order to) 218.4257 Tj
+(1911 ) 21.8426 Tj
0 -142.4004 Td
-(1912 // change p->state and then call sched.) 200.9517 Tj
+(1912 for\(;;\){) 65.5277 Tj
0 -151.8938 Td
-(1913 // Once we hold proc_table_lock, we can be) 214.0572 Tj
+(1913 // Enable interrupts on this processor.) 209.6887 Tj
0 -161.3871 Td
-(1914 // guaranteed that we won't miss any wakeup) 218.4257 Tj
+(1914 sti\(\);) 65.5277 Tj
0 -170.8805 Td
-(1915 // \(wakeup runs with proc_table_lock locked\),) 227.1628 Tj
+(1915 ) 21.8426 Tj
0 -180.3739 Td
-(1916 // so it's okay to release lk.) 161.635 Tj
+(1916 // Loop over process table looking for process to run.) 275.2164 Tj
0 -189.8672 Td
-(1917 if\(lk != &proc_table_lock\){) 148.5295 Tj
+(1917 acquire\(&ptable.lock\);) 135.4239 Tj
0 -199.3606 Td
-(1918 acquire\(&proc_table_lock\);) 152.898 Tj
+(1918 for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\){) 262.1109 Tj
0 -208.8539 Td
-(1919 release\(lk\);) 91.7388 Tj
+(1919 if\(p->state != RUNNABLE\)) 152.898 Tj
0 -218.3473 Td
-(1920 }) 34.9481 Tj
+(1920 continue;) 96.1073 Tj
0 -227.8407 Td
(1921 ) 21.8426 Tj
0 -237.334 Td
-(1922 // Go to sleep.) 96.1073 Tj
+(1922 // Switch to chosen process. It is the process's jo\
+b) 279.5849 Tj
0 -246.8274 Td
-(1923 cp->chan = chan;) 100.4758 Tj
+(1923 // to release ptable.lock and then reacquire it) 253.3738 Tj
0 -256.3207 Td
-(1924 cp->state = SLEEPING;) 122.3184 Tj
+(1924 // before jumping back to us.) 174.7406 Tj
0 -265.8141 Td
-(1925 sched\(\);) 65.5277 Tj
+(1925 cp = p;) 78.6333 Tj
0 -275.3075 Td
-(1926 ) 21.8426 Tj
+(1926 usegment\(\);) 96.1073 Tj
0 -284.8008 Td
-(1927 // Tidy up.) 78.6333 Tj
+(1927 p->state = RUNNING;) 131.0554 Tj
0 -294.2942 Td
-(1928 cp->chan = 0;) 87.3703 Tj
+(1928 swtch\(&c->context, p->context\);) 183.4776 Tj
0 -303.7875 Td
(1929 ) 21.8426 Tj
0 -313.2809 Td
-(1930 // Reacquire original lock.) 148.5295 Tj
+(1930 // Process is done running for now.) 200.9517 Tj
0 -322.7743 Td
-(1931 if\(lk != &proc_table_lock\){) 148.5295 Tj
+(1931 // It should have changed its p->state before coming\
+ back.) 301.4275 Tj
0 -332.2676 Td
-(1932 release\(&proc_table_lock\);) 152.898 Tj
+(1932 cp = 0;) 78.6333 Tj
0 -341.761 Td
-(1933 acquire\(lk\);) 91.7388 Tj
+(1933 }) 43.6851 Tj
0 -351.2543 Td
-(1934 }) 34.9481 Tj
+(1934 release\(&ptable.lock\);) 135.4239 Tj
0 -360.7477 Td
-(1935 }) 26.2111 Tj
+(1935 ) 21.8426 Tj
0 -370.2411 Td
-(1936 ) 21.8426 Tj
+(1936 }) 34.9481 Tj
0 -379.7344 Td
-(1937 ) 21.8426 Tj
+(1937 }) 26.2111 Tj
0 -389.2278 Td
(1938 ) 21.8426 Tj
0 -398.7211 Td
@@ -8962,95 +9034,96 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 8) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 8) 161.635 Tj
0 -28.4801 Td
-(1950 // Wake up all processes sleeping on chan.) 205.3202 Tj
+(1950 // Enter scheduler. Must hold only ptable.lock) 227.1628 Tj
0 -37.9735 Td
-(1951 // Proc_table_lock must be held.) 161.635 Tj
+(1951 // and have changed cp->state.) 152.898 Tj
0 -47.4668 Td
-(1952 static void) 69.8962 Tj
+(1952 void) 39.3166 Tj
0 -56.9602 Td
-(1953 wakeup1\(void *chan\)) 104.8443 Tj
+(1953 sched\(void\)) 69.8962 Tj
0 -66.4535 Td
(1954 {) 26.2111 Tj
0 -75.9469 Td
-(1955 struct proc *p;) 96.1073 Tj
+(1955 int intena;) 78.6333 Tj
0 -85.4403 Td
(1956 ) 21.8426 Tj
0 -94.9336 Td
-(1957 for\(p = proc; p < &proc[NPROC]; p++\)) 187.8461 Tj
+(1957 if\(!holding\(&ptable.lock\)\)) 144.161 Tj
0 -104.427 Td
-(1958 if\(p->state == SLEEPING && p->chan == chan\)) 227.1628 Tj
+(1958 panic\("sched ptable.lock"\);) 157.2665 Tj
0 -113.9203 Td
-(1959 p->state = RUNNABLE;) 135.4239 Tj
+(1959 if\(c->ncli != 1\)) 100.4758 Tj
0 -123.4137 Td
-(1960 }) 26.2111 Tj
+(1960 panic\("sched locks"\);) 131.0554 Tj
0 -132.9071 Td
-(1961 ) 21.8426 Tj
+(1961 if\(cp->state == RUNNING\)) 135.4239 Tj
0 -142.4004 Td
-(1962 // Wake up all processes sleeping on chan.) 205.3202 Tj
+(1962 panic\("sched running"\);) 139.7925 Tj
0 -151.8938 Td
-(1963 // Proc_table_lock is acquired and released.) 214.0572 Tj
+(1963 if\(readeflags\(\)&FL_IF\)) 126.6869 Tj
0 -161.3871 Td
-(1964 void) 39.3166 Tj
+(1964 panic\("sched interruptible"\);) 166.0035 Tj
0 -170.8805 Td
-(1965 wakeup\(void *chan\)) 100.4758 Tj
+(1965 ) 21.8426 Tj
0 -180.3739 Td
-(1966 {) 26.2111 Tj
+(1966 intena = c->intena;) 113.5814 Tj
0 -189.8672 Td
-(1967 acquire\(&proc_table_lock\);) 144.161 Tj
+(1967 swtch\(&cp->context, c->context\);) 170.3721 Tj
0 -199.3606 Td
-(1968 wakeup1\(chan\);) 91.7388 Tj
+(1968 c->intena = intena;) 113.5814 Tj
0 -208.8539 Td
-(1969 release\(&proc_table_lock\);) 144.161 Tj
+(1969 }) 26.2111 Tj
0 -218.3473 Td
-(1970 }) 26.2111 Tj
+(1970 ) 21.8426 Tj
0 -227.8407 Td
-(1971 ) 21.8426 Tj
+(1971 // Give up the CPU for one scheduling round.) 214.0572 Tj
0 -237.334 Td
-(1972 // Kill the process with the given pid.) 192.2146 Tj
+(1972 void) 39.3166 Tj
0 -246.8274 Td
-(1973 // Process won't actually exit until it returns) 227.1628 Tj
+(1973 yield\(void\)) 69.8962 Tj
0 -256.3207 Td
-(1974 // to user space \(see trap in trap.c\).) 187.8461 Tj
+(1974 {) 26.2111 Tj
0 -265.8141 Td
-(1975 int) 34.9481 Tj
+(1975 acquire\(&ptable.lock\); ) 135.4239 Tj
0 -275.3075 Td
-(1976 kill\(int pid\)) 78.6333 Tj
+(1976 cp->state = RUNNABLE;) 122.3184 Tj
0 -284.8008 Td
-(1977 {) 26.2111 Tj
+(1977 sched\(\);) 65.5277 Tj
0 -294.2942 Td
-(1978 struct proc *p;) 96.1073 Tj
+(1978 release\(&ptable.lock\);) 126.6869 Tj
0 -303.7875 Td
-(1979 ) 21.8426 Tj
+(1979 }) 26.2111 Tj
0 -313.2809 Td
-(1980 acquire\(&proc_table_lock\);) 144.161 Tj
+(1980 ) 21.8426 Tj
0 -322.7743 Td
-(1981 for\(p = proc; p < &proc[NPROC]; p++\){) 192.2146 Tj
+(1981 // A fork child's very first scheduling by scheduler\(\)) 257.7424 Tj
0 -332.2676 Td
-(1982 if\(p->pid == pid\){) 117.9499 Tj
+(1982 // will swtch here. "Return" to user space.) 214.0572 Tj
0 -341.761 Td
-(1983 p->killed = 1;) 109.2129 Tj
+(1983 void) 39.3166 Tj
0 -351.2543 Td
-(1984 // Wake process from sleep if necessary.) 222.7942 Tj
+(1984 forkret\(void\)) 78.6333 Tj
0 -360.7477 Td
-(1985 if\(p->state == SLEEPING\)) 152.898 Tj
+(1985 {) 26.2111 Tj
0 -370.2411 Td
-(1986 p->state = RUNNABLE;) 144.161 Tj
+(1986 // Still holding ptable.lock from scheduler.) 222.7942 Tj
0 -379.7344 Td
-(1987 release\(&proc_table_lock\);) 161.635 Tj
+(1987 release\(&ptable.lock\);) 126.6869 Tj
0 -389.2278 Td
-(1988 return 0;) 87.3703 Tj
+(1988 ) 21.8426 Tj
0 -398.7211 Td
-(1989 }) 43.6851 Tj
+(1989 // Return to "caller", actually trapret \(see allocproc\)\
+.) 275.2164 Tj
0 -408.2145 Td
-(1990 }) 34.9481 Tj
+(1990 }) 26.2111 Tj
0 -417.7079 Td
-(1991 release\(&proc_table_lock\);) 144.161 Tj
+(1991 ) 21.8426 Tj
0 -427.2012 Td
-(1992 return -1;) 74.2647 Tj
+(1992 ) 21.8426 Tj
0 -436.6946 Td
-(1993 }) 26.2111 Tj
+(1993 ) 21.8426 Tj
0 -446.1879 Td
(1994 ) 21.8426 Tj
0 -455.6813 Td
@@ -9093,6 +9166,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -9110,94 +9185,93 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 9) 161.635 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 9) 161.635 Tj
0 -28.4801 Td
-(2000 // Exit the current process. Does not return.) 222.7942 Tj
+(2000 // Atomically release lock and sleep on chan.) 218.4257 Tj
0 -37.9735 Td
-(2001 // Exited processes remain in the zombie state) 222.7942 Tj
+(2001 // Reacquires lock when reawakened.) 174.7406 Tj
0 -47.4668 Td
-(2002 // until their parent calls wait\(\) to find out they exit\
-ed.) 279.5849 Tj
+(2002 void) 39.3166 Tj
0 -56.9602 Td
-(2003 void) 39.3166 Tj
+(2003 sleep\(void *chan, struct spinlock *lk\)) 187.8461 Tj
0 -66.4535 Td
-(2004 exit\(void\)) 65.5277 Tj
+(2004 {) 26.2111 Tj
0 -75.9469 Td
-(2005 {) 26.2111 Tj
+(2005 if\(cp == 0\)) 78.6333 Tj
0 -85.4403 Td
-(2006 struct proc *p;) 96.1073 Tj
+(2006 panic\("sleep"\);) 104.8443 Tj
0 -94.9336 Td
-(2007 int fd;) 61.1592 Tj
+(2007 ) 21.8426 Tj
0 -104.427 Td
-(2008 ) 21.8426 Tj
+(2008 if\(lk == 0\)) 78.6333 Tj
0 -113.9203 Td
-(2009 if\(cp == initproc\)) 109.2129 Tj
+(2009 panic\("sleep without lk"\);) 152.898 Tj
0 -123.4137 Td
-(2010 panic\("init exiting"\);) 135.4239 Tj
+(2010 ) 21.8426 Tj
0 -132.9071 Td
-(2011 ) 21.8426 Tj
+(2011 // Must acquire ptable.lock in order to) 200.9517 Tj
0 -142.4004 Td
-(2012 // Close all open files.) 135.4239 Tj
+(2012 // change p->state and then call sched.) 200.9517 Tj
0 -151.8938 Td
-(2013 for\(fd = 0; fd < NOFILE; fd++\){) 166.0035 Tj
+(2013 // Once we hold ptable.lock, we can be) 196.5831 Tj
0 -161.3871 Td
-(2014 if\(cp->ofile[fd]\){) 117.9499 Tj
+(2014 // guaranteed that we won't miss any wakeup) 218.4257 Tj
0 -170.8805 Td
-(2015 fileclose\(cp->ofile[fd]\);) 157.2665 Tj
+(2015 // \(wakeup runs with ptable.lock locked\),) 209.6887 Tj
0 -180.3739 Td
-(2016 cp->ofile[fd] = 0;) 126.6869 Tj
+(2016 // so it's okay to release lk.) 161.635 Tj
0 -189.8672 Td
-(2017 }) 43.6851 Tj
+(2017 if\(lk != &ptable.lock\){ ) 139.7925 Tj
0 -199.3606 Td
-(2018 }) 34.9481 Tj
+(2018 acquire\(&ptable.lock\); ) 144.161 Tj
0 -208.8539 Td
-(2019 ) 21.8426 Tj
+(2019 release\(lk\);) 91.7388 Tj
0 -218.3473 Td
-(2020 iput\(cp->cwd\);) 91.7388 Tj
+(2020 }) 34.9481 Tj
0 -227.8407 Td
-(2021 cp->cwd = 0;) 83.0018 Tj
+(2021 ) 21.8426 Tj
0 -237.334 Td
-(2022 ) 21.8426 Tj
+(2022 // Go to sleep.) 96.1073 Tj
0 -246.8274 Td
-(2023 acquire\(&proc_table_lock\);) 144.161 Tj
+(2023 cp->chan = chan;) 100.4758 Tj
0 -256.3207 Td
-(2024 ) 21.8426 Tj
+(2024 cp->state = SLEEPING;) 122.3184 Tj
0 -265.8141 Td
-(2025 // Parent might be sleeping in wait\(\).) 196.5831 Tj
+(2025 sched\(\);) 65.5277 Tj
0 -275.3075 Td
-(2026 wakeup1\(cp->parent\);) 117.9499 Tj
+(2026 ) 21.8426 Tj
0 -284.8008 Td
-(2027 ) 21.8426 Tj
+(2027 // Tidy up.) 78.6333 Tj
0 -294.2942 Td
-(2028 // Pass abandoned children to init.) 183.4776 Tj
+(2028 cp->chan = 0;) 87.3703 Tj
0 -303.7875 Td
-(2029 for\(p = proc; p < &proc[NPROC]; p++\){) 192.2146 Tj
+(2029 ) 21.8426 Tj
0 -313.2809 Td
-(2030 if\(p->parent == cp\){) 126.6869 Tj
+(2030 // Reacquire original lock.) 148.5295 Tj
0 -322.7743 Td
-(2031 p->parent = initproc;) 139.7925 Tj
+(2031 if\(lk != &ptable.lock\){ ) 139.7925 Tj
0 -332.2676 Td
-(2032 if\(p->state == ZOMBIE\)) 144.161 Tj
+(2032 release\(&ptable.lock\);) 135.4239 Tj
0 -341.761 Td
-(2033 wakeup1\(initproc\);) 135.4239 Tj
+(2033 acquire\(lk\);) 91.7388 Tj
0 -351.2543 Td
-(2034 }) 43.6851 Tj
+(2034 }) 34.9481 Tj
0 -360.7477 Td
-(2035 }) 34.9481 Tj
+(2035 }) 26.2111 Tj
0 -370.2411 Td
(2036 ) 21.8426 Tj
0 -379.7344 Td
-(2037 // Jump into the scheduler, never to return.) 222.7942 Tj
+(2037 ) 21.8426 Tj
0 -389.2278 Td
-(2038 cp->killed = 0;) 96.1073 Tj
+(2038 ) 21.8426 Tj
0 -398.7211 Td
-(2039 cp->state = ZOMBIE;) 113.5814 Tj
+(2039 ) 21.8426 Tj
0 -408.2145 Td
-(2040 sched\(\);) 65.5277 Tj
+(2040 ) 21.8426 Tj
0 -417.7079 Td
-(2041 panic\("zombie exit"\);) 122.3184 Tj
+(2041 ) 21.8426 Tj
0 -427.2012 Td
-(2042 }) 26.2111 Tj
+(2042 ) 21.8426 Tj
0 -436.6946 Td
(2043 ) 21.8426 Tj
0 -446.1879 Td
@@ -9230,92 +9304,91 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 10) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 10) 166.0035 Tj
0 -28.4801 Td
-(2050 // Wait for a child process to exit and return its pid.) 262.1109 Tj
+(2050 // Wake up all processes sleeping on chan.) 205.3202 Tj
0 -37.9735 Td
-(2051 // Return -1 if this process has no children.) 218.4257 Tj
+(2051 // The ptable lock must be held.) 161.635 Tj
0 -47.4668 Td
-(2052 int) 34.9481 Tj
+(2052 static void) 69.8962 Tj
0 -56.9602 Td
-(2053 wait\(void\)) 65.5277 Tj
+(2053 wakeup1\(void *chan\)) 104.8443 Tj
0 -66.4535 Td
(2054 {) 26.2111 Tj
0 -75.9469 Td
(2055 struct proc *p;) 96.1073 Tj
0 -85.4403 Td
-(2056 int i, havekids, pid;) 122.3184 Tj
+(2056 ) 21.8426 Tj
0 -94.9336 Td
-(2057 ) 21.8426 Tj
+(2057 for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\)) 249.0053 Tj
0 -104.427 Td
-(2058 acquire\(&proc_table_lock\);) 144.161 Tj
+(2058 if\(p->state == SLEEPING && p->chan == chan\)) 227.1628 Tj
0 -113.9203 Td
-(2059 for\(;;\){) 65.5277 Tj
+(2059 p->state = RUNNABLE;) 135.4239 Tj
0 -123.4137 Td
-(2060 // Scan through table looking for zombie children.) 257.7424 Tj
+(2060 }) 26.2111 Tj
0 -132.9071 Td
-(2061 havekids = 0;) 96.1073 Tj
+(2061 ) 21.8426 Tj
0 -142.4004 Td
-(2062 for\(i = 0; i < NPROC; i++\){) 157.2665 Tj
+(2062 // Wake up all processes sleeping on chan.) 205.3202 Tj
0 -151.8938 Td
-(2063 p = &proc[i];) 104.8443 Tj
+(2063 void) 39.3166 Tj
0 -161.3871 Td
-(2064 if\(p->state == UNUSED\)) 144.161 Tj
+(2064 wakeup\(void *chan\)) 100.4758 Tj
0 -170.8805 Td
-(2065 continue;) 96.1073 Tj
+(2065 {) 26.2111 Tj
0 -180.3739 Td
-(2066 if\(p->parent == cp\){) 135.4239 Tj
+(2066 acquire\(&ptable.lock\);) 126.6869 Tj
0 -189.8672 Td
-(2067 if\(p->state == ZOMBIE\){) 157.2665 Tj
+(2067 wakeup1\(chan\);) 91.7388 Tj
0 -199.3606 Td
-(2068 // Found one.) 122.3184 Tj
+(2068 release\(&ptable.lock\);) 126.6869 Tj
0 -208.8539 Td
-(2069 kfree\(p->mem, p->sz\);) 157.2665 Tj
+(2069 }) 26.2111 Tj
0 -218.3473 Td
-(2070 kfree\(p->kstack, KSTACKSIZE\);) 192.2146 Tj
+(2070 ) 21.8426 Tj
0 -227.8407 Td
-(2071 pid = p->pid;) 122.3184 Tj
+(2071 // Kill the process with the given pid.) 192.2146 Tj
0 -237.334 Td
-(2072 p->state = UNUSED;) 144.161 Tj
+(2072 // Process won't actually exit until it returns) 227.1628 Tj
0 -246.8274 Td
-(2073 p->pid = 0;) 113.5814 Tj
+(2073 // to user space \(see trap in trap.c\).) 187.8461 Tj
0 -256.3207 Td
-(2074 p->parent = 0;) 126.6869 Tj
+(2074 int) 34.9481 Tj
0 -265.8141 Td
-(2075 p->name[0] = 0;) 131.0554 Tj
+(2075 kill\(int pid\)) 78.6333 Tj
0 -275.3075 Td
-(2076 release\(&proc_table_lock\);) 179.1091 Tj
+(2076 {) 26.2111 Tj
0 -284.8008 Td
-(2077 return pid;) 113.5814 Tj
+(2077 struct proc *p;) 96.1073 Tj
0 -294.2942 Td
-(2078 }) 61.1592 Tj
+(2078 ) 21.8426 Tj
0 -303.7875 Td
-(2079 havekids = 1;) 113.5814 Tj
+(2079 acquire\(&ptable.lock\);) 126.6869 Tj
0 -313.2809 Td
-(2080 }) 52.4222 Tj
+(2080 for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\){) 253.3738 Tj
0 -322.7743 Td
-(2081 }) 43.6851 Tj
+(2081 if\(p->pid == pid\){) 117.9499 Tj
0 -332.2676 Td
-(2082 ) 21.8426 Tj
+(2082 p->killed = 1;) 109.2129 Tj
0 -341.761 Td
-(2083 // No point waiting if we don't have any children.) 257.7424 Tj
+(2083 // Wake process from sleep if necessary.) 222.7942 Tj
0 -351.2543 Td
-(2084 if\(!havekids || cp->killed\){) 161.635 Tj
+(2084 if\(p->state == SLEEPING\)) 152.898 Tj
0 -360.7477 Td
-(2085 release\(&proc_table_lock\);) 161.635 Tj
+(2085 p->state = RUNNABLE;) 144.161 Tj
0 -370.2411 Td
-(2086 return -1;) 91.7388 Tj
+(2086 release\(&ptable.lock\);) 144.161 Tj
0 -379.7344 Td
-(2087 }) 43.6851 Tj
+(2087 return 0;) 87.3703 Tj
0 -389.2278 Td
-(2088 ) 21.8426 Tj
+(2088 }) 43.6851 Tj
0 -398.7211 Td
-(2089 // Wait for children to exit. \(See wakeup1 call in p\
-roc_exit.\)) 314.533 Tj
+(2089 }) 34.9481 Tj
0 -408.2145 Td
-(2090 sleep\(cp, &proc_table_lock\);) 161.635 Tj
+(2090 release\(&ptable.lock\);) 126.6869 Tj
0 -417.7079 Td
-(2091 }) 34.9481 Tj
+(2091 return -1;) 74.2647 Tj
0 -427.2012 Td
(2092 }) 26.2111 Tj
0 -436.6946 Td
@@ -9362,6 +9435,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -9379,92 +9454,92 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/proc.c Page 11) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 11) 166.0035 Tj
0 -28.4801 Td
-(2100 // Print a process listing to console. For debugging.) 257.7424 Tj
+(2100 // Exit the current process. Does not return.) 222.7942 Tj
0 -37.9735 Td
-(2101 // Runs when user types ^P on console.) 187.8461 Tj
+(2101 // Exited processes remain in the zombie state) 222.7942 Tj
0 -47.4668 Td
-(2102 // No lock to avoid wedging a stuck machine further.) 249.0053 Tj
+(2102 // until their parent calls wait\(\) to find out they exit\
+ed.) 279.5849 Tj
0 -56.9602 Td
(2103 void) 39.3166 Tj
0 -66.4535 Td
-(2104 procdump\(void\)) 83.0018 Tj
+(2104 exit\(void\)) 65.5277 Tj
0 -75.9469 Td
(2105 {) 26.2111 Tj
0 -85.4403 Td
-(2106 static char *states[] = {) 139.7925 Tj
+(2106 struct proc *p;) 96.1073 Tj
0 -94.9336 Td
-(2107 [UNUSED] "unused",) 122.3184 Tj
+(2107 int fd;) 61.1592 Tj
0 -104.427 Td
-(2108 [EMBRYO] "embryo",) 122.3184 Tj
+(2108 ) 21.8426 Tj
0 -113.9203 Td
-(2109 [SLEEPING] "sleep ",) 122.3184 Tj
+(2109 if\(cp == initproc\)) 109.2129 Tj
0 -123.4137 Td
-(2110 [RUNNABLE] "runble",) 122.3184 Tj
+(2110 panic\("init exiting"\);) 135.4239 Tj
0 -132.9071 Td
-(2111 [RUNNING] "run ",) 122.3184 Tj
+(2111 ) 21.8426 Tj
0 -142.4004 Td
-(2112 [ZOMBIE] "zombie") 117.9499 Tj
+(2112 // Close all open files.) 135.4239 Tj
0 -151.8938 Td
-(2113 };) 39.3166 Tj
+(2113 for\(fd = 0; fd < NOFILE; fd++\){) 166.0035 Tj
0 -161.3871 Td
-(2114 int i, j;) 69.8962 Tj
+(2114 if\(cp->ofile[fd]\){) 117.9499 Tj
0 -170.8805 Td
-(2115 struct proc *p;) 96.1073 Tj
+(2115 fileclose\(cp->ofile[fd]\);) 157.2665 Tj
0 -180.3739 Td
-(2116 char *state;) 83.0018 Tj
+(2116 cp->ofile[fd] = 0;) 126.6869 Tj
0 -189.8672 Td
-(2117 uint pc[10];) 83.0018 Tj
+(2117 }) 43.6851 Tj
0 -199.3606 Td
-(2118 ) 21.8426 Tj
+(2118 }) 34.9481 Tj
0 -208.8539 Td
-(2119 for\(i = 0; i < NPROC; i++\){) 148.5295 Tj
+(2119 ) 21.8426 Tj
0 -218.3473 Td
-(2120 p = &proc[i];) 96.1073 Tj
+(2120 iput\(cp->cwd\);) 91.7388 Tj
0 -227.8407 Td
-(2121 if\(p->state == UNUSED\)) 135.4239 Tj
+(2121 cp->cwd = 0;) 83.0018 Tj
0 -237.334 Td
-(2122 continue;) 87.3703 Tj
+(2122 ) 21.8426 Tj
0 -246.8274 Td
-(2123 if\(p->state >= 0 && p->state < NELEM\(states\) && sta\
-tes[p->state]\)) 323.2701 Tj
+(2123 acquire\(&ptable.lock\);) 126.6869 Tj
0 -256.3207 Td
-(2124 state = states[p->state];) 157.2665 Tj
+(2124 ) 21.8426 Tj
0 -265.8141 Td
-(2125 else) 56.7907 Tj
+(2125 // Parent might be sleeping in wait\(\).) 196.5831 Tj
0 -275.3075 Td
-(2126 state = "???";) 109.2129 Tj
+(2126 wakeup1\(cp->parent\);) 117.9499 Tj
0 -284.8008 Td
-(2127 cprintf\("%d %s %s", p->pid, state, p->name\);) 231.5313 Tj
+(2127 ) 21.8426 Tj
0 -294.2942 Td
-(2128 if\(p->state == SLEEPING\){) 148.5295 Tj
+(2128 // Pass abandoned children to init.) 183.4776 Tj
0 -303.7875 Td
-(2129 getcallerpcs\(\(uint*\)p->context.ebp+2, pc\);) 231.5313 Tj
+(2129 for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\){) 253.3738 Tj
0 -313.2809 Td
-(2130 for\(j=0; j<10 && pc[j] != 0; j++\)) 192.2146 Tj
+(2130 if\(p->parent == cp\){) 126.6869 Tj
0 -322.7743 Td
-(2131 cprintf\(" %p", pc[j]\);) 152.898 Tj
+(2131 p->parent = initproc;) 139.7925 Tj
0 -332.2676 Td
-(2132 }) 43.6851 Tj
+(2132 if\(p->state == ZOMBIE\)) 144.161 Tj
0 -341.761 Td
-(2133 cprintf\("\\n"\);) 100.4758 Tj
+(2133 wakeup1\(initproc\);) 135.4239 Tj
0 -351.2543 Td
-(2134 }) 34.9481 Tj
+(2134 }) 43.6851 Tj
0 -360.7477 Td
-(2135 }) 26.2111 Tj
+(2135 }) 34.9481 Tj
0 -370.2411 Td
(2136 ) 21.8426 Tj
0 -379.7344 Td
-(2137 ) 21.8426 Tj
+(2137 // Jump into the scheduler, never to return.) 222.7942 Tj
0 -389.2278 Td
-(2138 ) 21.8426 Tj
+(2138 cp->state = ZOMBIE;) 113.5814 Tj
0 -398.7211 Td
-(2139 ) 21.8426 Tj
+(2139 sched\(\);) 65.5277 Tj
0 -408.2145 Td
-(2140 ) 21.8426 Tj
+(2140 panic\("zombie exit"\);) 122.3184 Tj
0 -417.7079 Td
-(2141 ) 21.8426 Tj
+(2141 }) 26.2111 Tj
0 -427.2012 Td
(2142 ) 21.8426 Tj
0 -436.6946 Td
@@ -9499,91 +9574,90 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/swtch.S Page 1) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/proc.c Page 12) 166.0035 Tj
0 -28.4801 Td
-(2150 # void swtch\(struct context *old, struct context *new\)\
-;) 270.8479 Tj
+(2150 // Wait for a child process to exit and return its pid.) 262.1109 Tj
0 -37.9735 Td
-(2151 #) 26.2111 Tj
+(2151 // Return -1 if this process has no children.) 218.4257 Tj
0 -47.4668 Td
-(2152 # Save current register context in old) 187.8461 Tj
+(2152 int) 34.9481 Tj
0 -56.9602 Td
-(2153 # and then load register context from new.) 205.3202 Tj
+(2153 wait\(void\)) 65.5277 Tj
0 -66.4535 Td
-(2154 ) 21.8426 Tj
+(2154 {) 26.2111 Tj
0 -75.9469 Td
-(2155 .globl swtch) 74.2647 Tj
+(2155 struct proc *p;) 96.1073 Tj
0 -85.4403 Td
-(2156 swtch:) 48.0537 Tj
+(2156 int havekids, pid;) 109.2129 Tj
0 -94.9336 Td
-(2157 # Save old registers) 117.9499 Tj
+(2157 ) 21.8426 Tj
0 -104.427 Td
-(2158 movl 4\(%esp\), %eax) 109.2129 Tj
+(2158 acquire\(&ptable.lock\);) 126.6869 Tj
0 -113.9203 Td
-(2159 ) 21.8426 Tj
+(2159 for\(;;\){) 65.5277 Tj
0 -123.4137 Td
-(2160 popl 0\(%eax\) # %eip) 117.9499 Tj
+(2160 // Scan through table looking for zombie children.) 257.7424 Tj
0 -132.9071 Td
-(2161 movl %esp, 4\(%eax\)) 109.2129 Tj
+(2161 havekids = 0;) 96.1073 Tj
0 -142.4004 Td
-(2162 movl %ebx, 8\(%eax\)) 109.2129 Tj
+(2162 for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\){) 262.1109 Tj
0 -151.8938 Td
-(2163 movl %ecx, 12\(%eax\)) 113.5814 Tj
+(2163 if\(p->parent != cp\)) 131.0554 Tj
0 -161.3871 Td
-(2164 movl %edx, 16\(%eax\)) 113.5814 Tj
+(2164 continue;) 96.1073 Tj
0 -170.8805 Td
-(2165 movl %esi, 20\(%eax\)) 113.5814 Tj
+(2165 havekids = 1;) 104.8443 Tj
0 -180.3739 Td
-(2166 movl %edi, 24\(%eax\)) 113.5814 Tj
+(2166 if\(p->state == ZOMBIE\){) 148.5295 Tj
0 -189.8672 Td
-(2167 movl %ebp, 28\(%eax\)) 113.5814 Tj
+(2167 // Found one.) 113.5814 Tj
0 -199.3606 Td
-(2168 ) 21.8426 Tj
+(2168 pid = p->pid;) 113.5814 Tj
0 -208.8539 Td
-(2169 # Load new registers) 117.9499 Tj
+(2169 kfree\(p->mem, p->sz\);) 148.5295 Tj
0 -218.3473 Td
-(2170 movl 4\(%esp\), %eax # not 8\(%esp\) - popped return ad\
-dress above) 305.796 Tj
+(2170 kfree\(p->kstack, KSTACKSIZE\);) 183.4776 Tj
0 -227.8407 Td
-(2171 ) 21.8426 Tj
+(2171 p->state = UNUSED;) 135.4239 Tj
0 -237.334 Td
-(2172 movl 28\(%eax\), %ebp) 113.5814 Tj
+(2172 p->pid = 0;) 104.8443 Tj
0 -246.8274 Td
-(2173 movl 24\(%eax\), %edi) 113.5814 Tj
+(2173 p->parent = 0;) 117.9499 Tj
0 -256.3207 Td
-(2174 movl 20\(%eax\), %esi) 113.5814 Tj
+(2174 p->name[0] = 0;) 122.3184 Tj
0 -265.8141 Td
-(2175 movl 16\(%eax\), %edx) 113.5814 Tj
+(2175 p->killed = 0;) 117.9499 Tj
0 -275.3075 Td
-(2176 movl 12\(%eax\), %ecx) 113.5814 Tj
+(2176 release\(&ptable.lock\);) 152.898 Tj
0 -284.8008 Td
-(2177 movl 8\(%eax\), %ebx) 109.2129 Tj
+(2177 return pid;) 104.8443 Tj
0 -294.2942 Td
-(2178 movl 4\(%eax\), %esp) 109.2129 Tj
+(2178 }) 52.4222 Tj
0 -303.7875 Td
-(2179 pushl 0\(%eax\) # %eip) 122.3184 Tj
+(2179 }) 43.6851 Tj
0 -313.2809 Td
(2180 ) 21.8426 Tj
0 -322.7743 Td
-(2181 ret) 43.6851 Tj
+(2181 // No point waiting if we don't have any children.) 257.7424 Tj
0 -332.2676 Td
-(2182 ) 21.8426 Tj
+(2182 if\(!havekids || cp->killed\){) 161.635 Tj
0 -341.761 Td
-(2183 ) 21.8426 Tj
+(2183 release\(&ptable.lock\);) 144.161 Tj
0 -351.2543 Td
-(2184 ) 21.8426 Tj
+(2184 return -1;) 91.7388 Tj
0 -360.7477 Td
-(2185 ) 21.8426 Tj
+(2185 }) 43.6851 Tj
0 -370.2411 Td
(2186 ) 21.8426 Tj
0 -379.7344 Td
-(2187 ) 21.8426 Tj
+(2187 // Wait for children to exit. \(See wakeup1 call in p\
+roc_exit.\)) 314.533 Tj
0 -389.2278 Td
-(2188 ) 21.8426 Tj
+(2188 sleep\(cp, &ptable.lock\); ) 152.898 Tj
0 -398.7211 Td
-(2189 ) 21.8426 Tj
+(2189 }) 34.9481 Tj
0 -408.2145 Td
-(2190 ) 21.8426 Tj
+(2190 }) 26.2111 Tj
0 -417.7079 Td
(2191 ) 21.8426 Tj
0 -427.2012 Td
@@ -9632,6 +9706,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -9649,88 +9725,84 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/kalloc.c Page 1) 170.3721 Tj
+(Aug 8 01:04 2009 xv6/swtch.S Page 1) 166.0035 Tj
0 -28.4801 Td
-(2200 // Physical memory allocator, intended to allocate) 240.2683 Tj
+(2200 # Context switch) 91.7388 Tj
0 -37.9735 Td
-(2201 // memory for user processes. Allocates in 4096-byte "page\
-s".) 288.322 Tj
+(2201 #) 26.2111 Tj
0 -47.4668 Td
-(2202 // Free list is kept sorted and combines adjacent pages in\
-to) 283.9534 Tj
+(2202 # void swtch\(struct context **old, struct context *new\)\
+;) 275.2164 Tj
0 -56.9602 Td
-(2203 // long runs, to make it easier to allocate big segments.) 270.8479 Tj
+(2203 #) 26.2111 Tj
0 -66.4535 Td
-(2204 // One reason the page size is 4k is that the x86 segment \
-size) 292.6905 Tj
+(2204 # Save current register context in old) 187.8461 Tj
0 -75.9469 Td
-(2205 // granularity is 4k.) 113.5814 Tj
+(2205 # and then load register context from new.) 205.3202 Tj
0 -85.4403 Td
(2206 ) 21.8426 Tj
0 -94.9336 Td
-(2207 #include "types.h") 100.4758 Tj
+(2207 .globl swtch) 74.2647 Tj
0 -104.427 Td
-(2208 #include "defs.h") 96.1073 Tj
+(2208 swtch:) 48.0537 Tj
0 -113.9203 Td
-(2209 #include "param.h") 100.4758 Tj
+(2209 movl 4\(%esp\), %eax) 109.2129 Tj
0 -123.4137 Td
-(2210 #include "spinlock.h") 113.5814 Tj
+(2210 movl 8\(%esp\), %edx) 109.2129 Tj
0 -132.9071 Td
(2211 ) 21.8426 Tj
0 -142.4004 Td
-(2212 struct spinlock kalloc_lock;) 144.161 Tj
+(2212 # Save old callee-save registers) 170.3721 Tj
0 -151.8938 Td
-(2213 ) 21.8426 Tj
+(2213 pushl %ebp) 74.2647 Tj
0 -161.3871 Td
-(2214 struct run {) 74.2647 Tj
+(2214 pushl %ebx) 74.2647 Tj
0 -170.8805 Td
-(2215 struct run *next;) 104.8443 Tj
+(2215 pushl %esi) 74.2647 Tj
0 -180.3739 Td
-(2216 int len; // bytes) 104.8443 Tj
+(2216 pushl %edi) 74.2647 Tj
0 -189.8672 Td
-(2217 };) 30.5796 Tj
+(2217 ) 21.8426 Tj
0 -199.3606 Td
-(2218 struct run *freelist;) 113.5814 Tj
+(2218 # Switch stacks) 96.1073 Tj
0 -208.8539 Td
-(2219 ) 21.8426 Tj
+(2219 movl %esp, \(%eax\)) 104.8443 Tj
0 -218.3473 Td
-(2220 // Initialize free list of physical pages.) 205.3202 Tj
+(2220 movl %edx, %esp) 96.1073 Tj
0 -227.8407 Td
-(2221 // This code cheats by just considering one megabyte of) 262.1109 Tj
+(2221 ) 21.8426 Tj
0 -237.334 Td
-(2222 // pages after _end. Real systems would determine the) 257.7424 Tj
+(2222 # Load new callee-save registers) 170.3721 Tj
0 -246.8274 Td
-(2223 // amount of memory available in the system and use it all\
-.) 279.5849 Tj
+(2223 popl %edi) 69.8962 Tj
0 -256.3207 Td
-(2224 void) 39.3166 Tj
+(2224 popl %esi) 69.8962 Tj
0 -265.8141 Td
-(2225 kinit\(void\)) 69.8962 Tj
+(2225 popl %ebx) 69.8962 Tj
0 -275.3075 Td
-(2226 {) 26.2111 Tj
+(2226 popl %ebp) 69.8962 Tj
0 -284.8008 Td
-(2227 extern int end;) 96.1073 Tj
+(2227 ret) 43.6851 Tj
0 -294.2942 Td
-(2228 uint mem;) 69.8962 Tj
+(2228 ) 21.8426 Tj
0 -303.7875 Td
-(2229 char *start;) 83.0018 Tj
+(2229 ) 21.8426 Tj
0 -313.2809 Td
(2230 ) 21.8426 Tj
0 -322.7743 Td
-(2231 initlock\(&kalloc_lock, "kalloc"\);) 174.7406 Tj
+(2231 ) 21.8426 Tj
0 -332.2676 Td
-(2232 start = \(char*\) &end;) 122.3184 Tj
+(2232 ) 21.8426 Tj
0 -341.761 Td
-(2233 start = \(char*\) \(\(\(uint\)start + PAGE\) & ~\(PAGE-1\
-\)\);) 253.3738 Tj
+(2233 ) 21.8426 Tj
0 -351.2543 Td
-(2234 mem = 256; // assume computer has 256 pages of RAM) 249.0053 Tj
+(2234 ) 21.8426 Tj
0 -360.7477 Td
-(2235 cprintf\("mem = %d\\n", mem * PAGE\);) 179.1091 Tj
+(2235 ) 21.8426 Tj
0 -370.2411 Td
-(2236 kfree\(start, mem * PAGE\);) 139.7925 Tj
+(2236 ) 21.8426 Tj
0 -379.7344 Td
-(2237 }) 26.2111 Tj
+(2237 ) 21.8426 Tj
0 -389.2278 Td
(2238 ) 21.8426 Tj
0 -398.7211 Td
@@ -9773,99 +9845,102 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/kalloc.c Page 2) 170.3721 Tj
+(Aug 8 01:04 2009 xv6/kalloc.c Page 1) 170.3721 Tj
0 -28.4801 Td
-(2250 // Free the len bytes of memory pointed at by v,) 231.5313 Tj
+(2250 // Physical memory allocator, intended to allocate) 240.2683 Tj
0 -37.9735 Td
-(2251 // which normally should have been returned by a) 231.5313 Tj
+(2251 // memory for user processes. Allocates in 4096-byte "page\
+s".) 288.322 Tj
0 -47.4668 Td
-(2252 // call to kalloc\(len\). \(The exception is when) 227.1628 Tj
+(2252 // Free list is kept sorted and combines adjacent pages in\
+to) 283.9534 Tj
0 -56.9602 Td
-(2253 // initializing the allocator; see kinit above.\)) 231.5313 Tj
+(2253 // long runs, to make it easier to allocate big segments.) 270.8479 Tj
0 -66.4535 Td
-(2254 void) 39.3166 Tj
+(2254 // One reason the page size is 4k is that the x86 segment \
+size) 292.6905 Tj
0 -75.9469 Td
-(2255 kfree\(char *v, int len\)) 122.3184 Tj
+(2255 // granularity is 4k.) 113.5814 Tj
0 -85.4403 Td
-(2256 {) 26.2111 Tj
+(2256 ) 21.8426 Tj
0 -94.9336 Td
-(2257 struct run *r, *rend, **rp, *p, *pend;) 196.5831 Tj
+(2257 #include "types.h") 100.4758 Tj
0 -104.427 Td
-(2258 ) 21.8426 Tj
+(2258 #include "defs.h") 96.1073 Tj
0 -113.9203 Td
-(2259 if\(len <= 0 || len % PAGE\)) 144.161 Tj
+(2259 #include "param.h") 100.4758 Tj
0 -123.4137 Td
-(2260 panic\("kfree"\);) 104.8443 Tj
+(2260 #include "spinlock.h") 113.5814 Tj
0 -132.9071 Td
(2261 ) 21.8426 Tj
0 -142.4004 Td
-(2262 // Fill with junk to catch dangling refs.) 209.6887 Tj
+(2262 struct run {) 74.2647 Tj
0 -151.8938 Td
-(2263 memset\(v, 1, len\);) 109.2129 Tj
+(2263 struct run *next;) 104.8443 Tj
0 -161.3871 Td
-(2264 ) 21.8426 Tj
+(2264 int len; // bytes) 104.8443 Tj
0 -170.8805 Td
-(2265 acquire\(&kalloc_lock\);) 126.6869 Tj
+(2265 };) 30.5796 Tj
0 -180.3739 Td
-(2266 p = \(struct run*\)v;) 113.5814 Tj
+(2266 ) 21.8426 Tj
0 -189.8672 Td
-(2267 pend = \(struct run*\)\(v + len\);) 161.635 Tj
+(2267 struct {) 56.7907 Tj
0 -199.3606 Td
-(2268 for\(rp=&freelist; \(r=*rp\) != 0 && r <= pend; rp=&r->n\
-ext\){) 283.9534 Tj
+(2268 struct spinlock lock;) 122.3184 Tj
0 -208.8539 Td
-(2269 rend = \(struct run*\)\(\(char*\)r + r->len\);) 214.0572 Tj
+(2269 struct run *freelist;) 122.3184 Tj
0 -218.3473 Td
-(2270 if\(r <= p && p < rend\)) 135.4239 Tj
+(2270 } kmem;) 52.4222 Tj
0 -227.8407 Td
-(2271 panic\("freeing free page"\);) 166.0035 Tj
+(2271 ) 21.8426 Tj
0 -237.334 Td
-(2272 if\(pend == r\){ // p next to r: replace r with p) 249.0053 Tj
+(2272 // Initialize free list of physical pages.) 205.3202 Tj
0 -246.8274 Td
-(2273 p->len = len + r->len;) 144.161 Tj
+(2273 // This code cheats by just considering one megabyte of) 262.1109 Tj
0 -256.3207 Td
-(2274 p->next = r->next;) 126.6869 Tj
+(2274 // pages after end. Real systems would determine the) 253.3738 Tj
0 -265.8141 Td
-(2275 *rp = p;) 83.0018 Tj
+(2275 // amount of memory available in the system and use it all\
+.) 279.5849 Tj
0 -275.3075 Td
-(2276 goto out;) 87.3703 Tj
+(2276 void) 39.3166 Tj
0 -284.8008 Td
-(2277 }) 43.6851 Tj
+(2277 kinit\(void\)) 69.8962 Tj
0 -294.2942 Td
-(2278 if\(rend == p\){ // r next to p: replace p with r) 249.0053 Tj
+(2278 {) 26.2111 Tj
0 -303.7875 Td
-(2279 r->len += len;) 109.2129 Tj
+(2279 extern char end[];) 109.2129 Tj
0 -313.2809 Td
-(2280 if\(r->next && r->next == pend\){ // r now next to \
-r->next?) 301.4275 Tj
+(2280 uint len;) 69.8962 Tj
0 -322.7743 Td
-(2281 r->len += r->next->len;) 157.2665 Tj
+(2281 char *p;) 65.5277 Tj
0 -332.2676 Td
-(2282 r->next = r->next->next;) 161.635 Tj
+(2282 ) 21.8426 Tj
0 -341.761 Td
-(2283 }) 52.4222 Tj
+(2283 initlock\(&kmem.lock, "kmem"\);) 157.2665 Tj
0 -351.2543 Td
-(2284 goto out;) 87.3703 Tj
+(2284 p = \(char*\)\(\(\(uint\)end + PAGE\) & ~\(PAGE-1\)\);) 222.7942 Tj
0 -360.7477 Td
-(2285 }) 43.6851 Tj
+(2285 len = 256*PAGE; // assume computer has 256 pages of RAM,\
+ 1 MB) 297.059 Tj
0 -370.2411 Td
-(2286 }) 34.9481 Tj
+(2286 cprintf\("mem = %d\\n", len\);) 148.5295 Tj
0 -379.7344 Td
-(2287 // Insert p before r in list.) 157.2665 Tj
+(2287 kfree\(p, len\);) 91.7388 Tj
0 -389.2278 Td
-(2288 p->len = len;) 87.3703 Tj
+(2288 }) 26.2111 Tj
0 -398.7211 Td
-(2289 p->next = r;) 83.0018 Tj
+(2289 ) 21.8426 Tj
0 -408.2145 Td
-(2290 *rp = p;) 65.5277 Tj
+(2290 ) 21.8426 Tj
0 -417.7079 Td
(2291 ) 21.8426 Tj
0 -427.2012 Td
-(2292 out:) 43.6851 Tj
+(2292 ) 21.8426 Tj
0 -436.6946 Td
-(2293 release\(&kalloc_lock\);) 126.6869 Tj
+(2293 ) 21.8426 Tj
0 -446.1879 Td
-(2294 }) 26.2111 Tj
+(2294 ) 21.8426 Tj
0 -455.6813 Td
(2295 ) 21.8426 Tj
0 -465.1747 Td
@@ -9906,6 +9981,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -9923,97 +10000,100 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/kalloc.c Page 3) 170.3721 Tj
+(Aug 8 01:04 2009 xv6/kalloc.c Page 2) 170.3721 Tj
0 -28.4801 Td
-(2300 // Allocate n bytes of physical memory.) 192.2146 Tj
+(2300 // Free the len bytes of memory pointed at by v,) 231.5313 Tj
0 -37.9735 Td
-(2301 // Returns a kernel-segment pointer.) 179.1091 Tj
+(2301 // which normally should have been returned by a) 231.5313 Tj
0 -47.4668 Td
-(2302 // Returns 0 if the memory cannot be allocated.) 227.1628 Tj
+(2302 // call to kalloc\(len\). \(The exception is when) 227.1628 Tj
0 -56.9602 Td
-(2303 char*) 43.6851 Tj
+(2303 // initializing the allocator; see kinit above.\)) 231.5313 Tj
0 -66.4535 Td
-(2304 kalloc\(int n\)) 78.6333 Tj
+(2304 void) 39.3166 Tj
0 -75.9469 Td
-(2305 {) 26.2111 Tj
+(2305 kfree\(char *v, int len\)) 122.3184 Tj
0 -85.4403 Td
-(2306 char *p;) 65.5277 Tj
+(2306 {) 26.2111 Tj
0 -94.9336 Td
-(2307 struct run *r, **rp;) 117.9499 Tj
+(2307 struct run *r, *rend, **rp, *p, *pend;) 196.5831 Tj
0 -104.427 Td
(2308 ) 21.8426 Tj
0 -113.9203 Td
-(2309 if\(n % PAGE || n <= 0\)) 126.6869 Tj
+(2309 if\(len <= 0 || len % PAGE\)) 144.161 Tj
0 -123.4137 Td
-(2310 panic\("kalloc"\);) 109.2129 Tj
+(2310 panic\("kfree"\);) 104.8443 Tj
0 -132.9071 Td
(2311 ) 21.8426 Tj
0 -142.4004 Td
-(2312 acquire\(&kalloc_lock\);) 126.6869 Tj
+(2312 // Fill with junk to catch dangling refs.) 209.6887 Tj
0 -151.8938 Td
-(2313 for\(rp=&freelist; \(r=*rp\) != 0; rp=&r->next\){) 227.1628 Tj
+(2313 memset\(v, 1, len\);) 109.2129 Tj
0 -161.3871 Td
-(2314 if\(r->len == n\){) 109.2129 Tj
+(2314 ) 21.8426 Tj
0 -170.8805 Td
-(2315 *rp = r->next;) 109.2129 Tj
+(2315 acquire\(&kmem.lock\);) 117.9499 Tj
0 -180.3739 Td
-(2316 release\(&kalloc_lock\);) 144.161 Tj
+(2316 p = \(struct run*\)v;) 113.5814 Tj
0 -189.8672 Td
-(2317 return \(char*\)r;) 117.9499 Tj
+(2317 pend = \(struct run*\)\(v + len\);) 161.635 Tj
0 -199.3606 Td
-(2318 }) 43.6851 Tj
+(2318 for\(rp=&kmem.freelist; \(r=*rp\) != 0 && r <= pend; rp=\
+&r->next\){) 305.796 Tj
0 -208.8539 Td
-(2319 if\(r->len > n\){) 104.8443 Tj
+(2319 rend = \(struct run*\)\(\(char*\)r + r->len\);) 214.0572 Tj
0 -218.3473 Td
-(2320 r->len -= n;) 100.4758 Tj
+(2320 if\(r <= p && p < rend\)) 135.4239 Tj
0 -227.8407 Td
-(2321 p = \(char*\)r + r->len;) 144.161 Tj
+(2321 panic\("freeing free page"\);) 166.0035 Tj
0 -237.334 Td
-(2322 release\(&kalloc_lock\);) 144.161 Tj
+(2322 if\(rend == p\){ // r before p: expand r to include p) 266.4794 Tj
0 -246.8274 Td
-(2323 return p;) 87.3703 Tj
+(2323 r->len += len;) 109.2129 Tj
0 -256.3207 Td
-(2324 }) 43.6851 Tj
+(2324 if\(r->next && r->next == pend\){ // r now next to \
+r->next?) 301.4275 Tj
0 -265.8141 Td
-(2325 }) 34.9481 Tj
+(2325 r->len += r->next->len;) 157.2665 Tj
0 -275.3075 Td
-(2326 release\(&kalloc_lock\);) 126.6869 Tj
+(2326 r->next = r->next->next;) 161.635 Tj
0 -284.8008 Td
-(2327 ) 21.8426 Tj
+(2327 }) 52.4222 Tj
0 -294.2942 Td
-(2328 cprintf\("kalloc: out of memory\\n"\);) 183.4776 Tj
+(2328 goto out;) 87.3703 Tj
0 -303.7875 Td
-(2329 return 0;) 69.8962 Tj
+(2329 }) 43.6851 Tj
0 -313.2809 Td
-(2330 }) 26.2111 Tj
+(2330 if\(pend == r\){ // p before r: expand p to include, \
+replace r) 305.796 Tj
0 -322.7743 Td
-(2331 ) 21.8426 Tj
+(2331 p->len = len + r->len;) 144.161 Tj
0 -332.2676 Td
-(2332 ) 21.8426 Tj
+(2332 p->next = r->next;) 126.6869 Tj
0 -341.761 Td
-(2333 ) 21.8426 Tj
+(2333 *rp = p;) 83.0018 Tj
0 -351.2543 Td
-(2334 ) 21.8426 Tj
+(2334 goto out;) 87.3703 Tj
0 -360.7477 Td
-(2335 ) 21.8426 Tj
+(2335 }) 43.6851 Tj
0 -370.2411 Td
-(2336 ) 21.8426 Tj
+(2336 }) 34.9481 Tj
0 -379.7344 Td
-(2337 ) 21.8426 Tj
+(2337 // Insert p before r in list.) 157.2665 Tj
0 -389.2278 Td
-(2338 ) 21.8426 Tj
+(2338 p->len = len;) 87.3703 Tj
0 -398.7211 Td
-(2339 ) 21.8426 Tj
+(2339 p->next = r;) 83.0018 Tj
0 -408.2145 Td
-(2340 ) 21.8426 Tj
+(2340 *rp = p;) 65.5277 Tj
0 -417.7079 Td
(2341 ) 21.8426 Tj
0 -427.2012 Td
-(2342 ) 21.8426 Tj
+(2342 out:) 43.6851 Tj
0 -436.6946 Td
-(2343 ) 21.8426 Tj
+(2343 release\(&kmem.lock\);) 117.9499 Tj
0 -446.1879 Td
-(2344 ) 21.8426 Tj
+(2344 }) 26.2111 Tj
0 -455.6813 Td
(2345 ) 21.8426 Tj
0 -465.1747 Td
@@ -10042,85 +10122,79 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/traps.h Page 1) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/kalloc.c Page 3) 170.3721 Tj
0 -28.4801 Td
-(2350 // x86 trap and interrupt constants.) 179.1091 Tj
+(2350 // Allocate n bytes of physical memory.) 192.2146 Tj
0 -37.9735 Td
-(2351 ) 21.8426 Tj
+(2351 // Returns a kernel-segment pointer.) 179.1091 Tj
0 -47.4668 Td
-(2352 // Processor-defined:) 113.5814 Tj
+(2352 // Returns 0 if the memory cannot be allocated.) 227.1628 Tj
0 -56.9602 Td
-(2353 #define T_DIVIDE 0 // divide error) 227.1628 Tj
+(2353 char*) 43.6851 Tj
0 -66.4535 Td
-(2354 #define T_DEBUG 1 // debug exception) 240.2683 Tj
+(2354 kalloc\(int n\)) 78.6333 Tj
0 -75.9469 Td
-(2355 #define T_NMI 2 // non-maskable interrupt) 270.8479 Tj
+(2355 {) 26.2111 Tj
0 -85.4403 Td
-(2356 #define T_BRKPT 3 // breakpoint) 218.4257 Tj
+(2356 char *p;) 65.5277 Tj
0 -94.9336 Td
-(2357 #define T_OFLOW 4 // overflow) 209.6887 Tj
+(2357 struct run *r, **rp;) 117.9499 Tj
0 -104.427 Td
-(2358 #define T_BOUND 5 // bounds check) 227.1628 Tj
+(2358 ) 21.8426 Tj
0 -113.9203 Td
-(2359 #define T_ILLOP 6 // illegal opcode) 235.8998 Tj
+(2359 if\(n % PAGE || n <= 0\)) 126.6869 Tj
0 -123.4137 Td
-(2360 #define T_DEVICE 7 // device not available) 262.1109 Tj
+(2360 panic\("kalloc"\);) 109.2129 Tj
0 -132.9071 Td
-(2361 #define T_DBLFLT 8 // double fault) 227.1628 Tj
+(2361 ) 21.8426 Tj
0 -142.4004 Td
-(2362 // #define T_COPROC 9 // reserved \(not used sin\
-ce 486\)) 301.4275 Tj
+(2362 acquire\(&kmem.lock\);) 117.9499 Tj
0 -151.8938 Td
-(2363 #define T_TSS 10 // invalid task switch seg\
-ment) 292.6905 Tj
+(2363 for\(rp=&kmem.freelist; \(r=*rp\) != 0; rp=&r->next\){) 249.0053 Tj
0 -161.3871 Td
-(2364 #define T_SEGNP 11 // segment not present) 257.7424 Tj
+(2364 if\(r->len >= n\){) 109.2129 Tj
0 -170.8805 Td
-(2365 #define T_STACK 12 // stack exception) 240.2683 Tj
+(2365 r->len -= n;) 100.4758 Tj
0 -180.3739 Td
-(2366 #define T_GPFLT 13 // general protection faul\
-t) 279.5849 Tj
+(2366 p = \(char*\)r + r->len;) 144.161 Tj
0 -189.8672 Td
-(2367 #define T_PGFLT 14 // page fault) 218.4257 Tj
+(2367 if\(r->len == 0\)) 113.5814 Tj
0 -199.3606 Td
-(2368 // #define T_RES 15 // reserved) 209.6887 Tj
+(2368 *rp = r->next;) 117.9499 Tj
0 -208.8539 Td
-(2369 #define T_FPERR 16 // floating point error) 262.1109 Tj
+(2369 release\(&kmem.lock\);) 135.4239 Tj
0 -218.3473 Td
-(2370 #define T_ALIGN 17 // aligment check) 235.8998 Tj
+(2370 return p;) 87.3703 Tj
0 -227.8407 Td
-(2371 #define T_MCHK 18 // machine check) 231.5313 Tj
+(2371 }) 43.6851 Tj
0 -237.334 Td
-(2372 #define T_SIMDERR 19 // SIMD floating point err\
-or) 283.9534 Tj
+(2372 }) 34.9481 Tj
0 -246.8274 Td
-(2373 ) 21.8426 Tj
+(2373 release\(&kmem.lock\);) 117.9499 Tj
0 -256.3207 Td
-(2374 // These are arbitrarily chosen, but with care not to over\
-lap) 288.322 Tj
+(2374 ) 21.8426 Tj
0 -265.8141 Td
-(2375 // processor defined exceptions or interrupt vectors.) 253.3738 Tj
+(2375 cprintf\("kalloc: out of memory\\n"\);) 183.4776 Tj
0 -275.3075 Td
-(2376 #define T_SYSCALL 48 // system call) 222.7942 Tj
+(2376 return 0;) 69.8962 Tj
0 -284.8008 Td
-(2377 #define T_DEFAULT 500 // catchall) 209.6887 Tj
+(2377 }) 26.2111 Tj
0 -294.2942 Td
(2378 ) 21.8426 Tj
0 -303.7875 Td
-(2379 #define IRQ_OFFSET 32 // IRQ 0 corresponds to in\
-t IRQ_OFFSET) 327.6386 Tj
+(2379 ) 21.8426 Tj
0 -313.2809 Td
(2380 ) 21.8426 Tj
0 -322.7743 Td
-(2381 #define IRQ_TIMER 0) 135.4239 Tj
+(2381 ) 21.8426 Tj
0 -332.2676 Td
-(2382 #define IRQ_KBD 1) 135.4239 Tj
+(2382 ) 21.8426 Tj
0 -341.761 Td
-(2383 #define IRQ_IDE 14) 135.4239 Tj
+(2383 ) 21.8426 Tj
0 -351.2543 Td
-(2384 #define IRQ_ERROR 19) 135.4239 Tj
+(2384 ) 21.8426 Tj
0 -360.7477 Td
-(2385 #define IRQ_SPURIOUS 31) 135.4239 Tj
+(2385 ) 21.8426 Tj
0 -370.2411 Td
(2386 ) 21.8426 Tj
0 -379.7344 Td
@@ -10179,6 +10253,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -10196,103 +10272,109 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/vectors.pl Page 1) 179.1091 Tj
+(Aug 8 01:04 2009 xv6/traps.h Page 1) 166.0035 Tj
0 -28.4801 Td
-(2400 #!/usr/bin/perl -w) 100.4758 Tj
+(2400 // x86 trap and interrupt constants.) 179.1091 Tj
0 -37.9735 Td
(2401 ) 21.8426 Tj
0 -47.4668 Td
-(2402 # Generate vectors.S, the trap/interrupt entry points.) 257.7424 Tj
+(2402 // Processor-defined:) 113.5814 Tj
0 -56.9602 Td
-(2403 # There has to be one entry point per interrupt number) 257.7424 Tj
+(2403 #define T_DIVIDE 0 // divide error) 227.1628 Tj
0 -66.4535 Td
-(2404 # since otherwise there's no way for trap\(\) to discover) 262.1109 Tj
+(2404 #define T_DEBUG 1 // debug exception) 240.2683 Tj
0 -75.9469 Td
-(2405 # the interrupt number.) 122.3184 Tj
+(2405 #define T_NMI 2 // non-maskable interrupt) 270.8479 Tj
0 -85.4403 Td
-(2406 ) 21.8426 Tj
+(2406 #define T_BRKPT 3 // breakpoint) 218.4257 Tj
0 -94.9336 Td
-(2407 print "# generated by vectors.pl - do not edit\\n";) 240.2683 Tj
+(2407 #define T_OFLOW 4 // overflow) 209.6887 Tj
0 -104.427 Td
-(2408 print "# handlers\\n";) 113.5814 Tj
+(2408 #define T_BOUND 5 // bounds check) 227.1628 Tj
0 -113.9203 Td
-(2409 print ".text\\n";) 91.7388 Tj
+(2409 #define T_ILLOP 6 // illegal opcode) 235.8998 Tj
0 -123.4137 Td
-(2410 print ".globl alltraps\\n";) 135.4239 Tj
+(2410 #define T_DEVICE 7 // device not available) 262.1109 Tj
0 -132.9071 Td
-(2411 for\(my $i = 0; $i < 256; $i++\){) 157.2665 Tj
+(2411 #define T_DBLFLT 8 // double fault) 227.1628 Tj
0 -142.4004 Td
-(2412 print ".globl vector$i\\n";) 152.898 Tj
+(2412 // #define T_COPROC 9 // reserved \(not used sin\
+ce 486\)) 301.4275 Tj
0 -151.8938 Td
-(2413 print "vector$i:\\n";) 126.6869 Tj
+(2413 #define T_TSS 10 // invalid task switch seg\
+ment) 292.6905 Tj
0 -161.3871 Td
-(2414 if\(\($i < 8 || $i > 14\) && $i != 17\){) 196.5831 Tj
+(2414 #define T_SEGNP 11 // segment not present) 257.7424 Tj
0 -170.8805 Td
-(2415 print " pushl \\$0\\n";) 152.898 Tj
+(2415 #define T_STACK 12 // stack exception) 240.2683 Tj
0 -180.3739 Td
-(2416 }) 43.6851 Tj
+(2416 #define T_GPFLT 13 // general protection faul\
+t) 279.5849 Tj
0 -189.8672 Td
-(2417 print " pushl \\$$i\\n";) 139.7925 Tj
+(2417 #define T_PGFLT 14 // page fault) 218.4257 Tj
0 -199.3606 Td
-(2418 print " jmp alltraps\\n";) 148.5295 Tj
+(2418 // #define T_RES 15 // reserved) 209.6887 Tj
0 -208.8539 Td
-(2419 }) 26.2111 Tj
+(2419 #define T_FPERR 16 // floating point error) 262.1109 Tj
0 -218.3473 Td
-(2420 ) 21.8426 Tj
+(2420 #define T_ALIGN 17 // aligment check) 235.8998 Tj
0 -227.8407 Td
-(2421 print "\\n# vector table\\n";) 139.7925 Tj
+(2421 #define T_MCHK 18 // machine check) 231.5313 Tj
0 -237.334 Td
-(2422 print ".data\\n";) 91.7388 Tj
+(2422 #define T_SIMDERR 19 // SIMD floating point err\
+or) 283.9534 Tj
0 -246.8274 Td
-(2423 print ".globl vectors\\n";) 131.0554 Tj
+(2423 ) 21.8426 Tj
0 -256.3207 Td
-(2424 print "vectors:\\n";) 104.8443 Tj
+(2424 // These are arbitrarily chosen, but with care not to over\
+lap) 288.322 Tj
0 -265.8141 Td
-(2425 for\(my $i = 0; $i < 256; $i++\){) 157.2665 Tj
+(2425 // processor defined exceptions or interrupt vectors.) 253.3738 Tj
0 -275.3075 Td
-(2426 print " .long vector$i\\n";) 157.2665 Tj
+(2426 #define T_SYSCALL 64 // system call) 218.4257 Tj
0 -284.8008 Td
-(2427 }) 26.2111 Tj
+(2427 #define T_DEFAULT 500 // catchall) 209.6887 Tj
0 -294.2942 Td
(2428 ) 21.8426 Tj
0 -303.7875 Td
-(2429 # sample output:) 91.7388 Tj
+(2429 #define T_IRQ0 32 // IRQ 0 corresponds to in\
+t T_IRQ) 305.796 Tj
0 -313.2809 Td
-(2430 # # handlers) 83.0018 Tj
+(2430 ) 21.8426 Tj
0 -322.7743 Td
-(2431 # .text) 61.1592 Tj
+(2431 #define IRQ_TIMER 0) 135.4239 Tj
0 -332.2676 Td
-(2432 # .globl alltraps) 104.8443 Tj
+(2432 #define IRQ_KBD 1) 135.4239 Tj
0 -341.761 Td
-(2433 # .globl vector0) 100.4758 Tj
+(2433 #define IRQ_COM1 4) 135.4239 Tj
0 -351.2543 Td
-(2434 # vector0:) 74.2647 Tj
+(2434 #define IRQ_IDE 14) 135.4239 Tj
0 -360.7477 Td
-(2435 # pushl $0) 83.0018 Tj
+(2435 #define IRQ_ERROR 19) 135.4239 Tj
0 -370.2411 Td
-(2436 # pushl $0) 83.0018 Tj
+(2436 #define IRQ_SPURIOUS 31) 135.4239 Tj
0 -379.7344 Td
-(2437 # jmp alltraps) 100.4758 Tj
+(2437 ) 21.8426 Tj
0 -389.2278 Td
-(2438 # ...) 52.4222 Tj
+(2438 ) 21.8426 Tj
0 -398.7211 Td
-(2439 #) 26.2111 Tj
+(2439 ) 21.8426 Tj
0 -408.2145 Td
-(2440 # # vector table) 100.4758 Tj
+(2440 ) 21.8426 Tj
0 -417.7079 Td
-(2441 # .data) 61.1592 Tj
+(2441 ) 21.8426 Tj
0 -427.2012 Td
-(2442 # .globl vectors) 100.4758 Tj
+(2442 ) 21.8426 Tj
0 -436.6946 Td
-(2443 # vectors:) 74.2647 Tj
+(2443 ) 21.8426 Tj
0 -446.1879 Td
-(2444 # .long vector0) 104.8443 Tj
+(2444 ) 21.8426 Tj
0 -455.6813 Td
-(2445 # .long vector1) 104.8443 Tj
+(2445 ) 21.8426 Tj
0 -465.1747 Td
-(2446 # .long vector2) 104.8443 Tj
+(2446 ) 21.8426 Tj
0 -474.668 Td
-(2447 # ...) 52.4222 Tj
+(2447 ) 21.8426 Tj
0 -484.1614 Td
(2448 ) 21.8426 Tj
0 -493.6547 Td
@@ -10315,99 +10397,100 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/trapasm.S Page 1) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/vectors.pl Page 1) 179.1091 Tj
0 -28.4801 Td
-(2450 .text) 43.6851 Tj
+(2450 #!/usr/bin/perl -w) 100.4758 Tj
0 -37.9735 Td
(2451 ) 21.8426 Tj
0 -47.4668 Td
-(2452 .set SEG_KDATA_SEL, 0x10 # selector for SEG_KDATA) 244.6368 Tj
+(2452 # Generate vectors.S, the trap/interrupt entry points.) 257.7424 Tj
0 -56.9602 Td
-(2453 ) 21.8426 Tj
+(2453 # There has to be one entry point per interrupt number) 257.7424 Tj
0 -66.4535 Td
-(2454 # vectors.S sends all traps here.) 174.7406 Tj
+(2454 # since otherwise there's no way for trap\(\) to discover) 262.1109 Tj
0 -75.9469 Td
-(2455 .globl alltraps) 87.3703 Tj
+(2455 # the interrupt number.) 122.3184 Tj
0 -85.4403 Td
-(2456 alltraps:) 61.1592 Tj
+(2456 ) 21.8426 Tj
0 -94.9336 Td
-(2457 # Build trap frame.) 113.5814 Tj
+(2457 print "# generated by vectors.pl - do not edit\\n";) 240.2683 Tj
0 -104.427 Td
-(2458 pushl %ds) 69.8962 Tj
+(2458 print "# handlers\\n";) 113.5814 Tj
0 -113.9203 Td
-(2459 pushl %es) 69.8962 Tj
+(2459 print ".globl alltraps\\n";) 135.4239 Tj
0 -123.4137 Td
-(2460 pushal) 56.7907 Tj
+(2460 for\(my $i = 0; $i < 256; $i++\){) 157.2665 Tj
0 -132.9071 Td
-(2461 ) 21.8426 Tj
+(2461 print ".globl vector$i\\n";) 152.898 Tj
0 -142.4004 Td
-(2462 # Set up data segments.) 131.0554 Tj
+(2462 print "vector$i:\\n";) 126.6869 Tj
0 -151.8938 Td
-(2463 movl $SEG_KDATA_SEL, %eax) 139.7925 Tj
+(2463 if\(!\($i == 8 || \($i >= 10 && $i <= 14\) || $i == 17\
+\)\){) 270.8479 Tj
0 -161.3871 Td
-(2464 movw %ax,%ds) 83.0018 Tj
+(2464 print " pushl \\$0\\n";) 152.898 Tj
0 -170.8805 Td
-(2465 movw %ax,%es) 83.0018 Tj
+(2465 }) 43.6851 Tj
0 -180.3739 Td
-(2466 ) 21.8426 Tj
+(2466 print " pushl \\$$i\\n";) 139.7925 Tj
0 -189.8672 Td
-(2467 # Call trap\(tf\), where tf=%esp) 161.635 Tj
+(2467 print " jmp alltraps\\n";) 148.5295 Tj
0 -199.3606 Td
-(2468 pushl %esp) 74.2647 Tj
+(2468 }) 26.2111 Tj
0 -208.8539 Td
-(2469 call trap) 69.8962 Tj
+(2469 ) 21.8426 Tj
0 -218.3473 Td
-(2470 addl $4, %esp) 87.3703 Tj
+(2470 print "\\n# vector table\\n";) 139.7925 Tj
0 -227.8407 Td
-(2471 ) 21.8426 Tj
+(2471 print ".data\\n";) 91.7388 Tj
0 -237.334 Td
-(2472 # Return falls through to trapret...) 187.8461 Tj
+(2472 print ".globl vectors\\n";) 131.0554 Tj
0 -246.8274 Td
-(2473 .globl trapret) 83.0018 Tj
+(2473 print "vectors:\\n";) 104.8443 Tj
0 -256.3207 Td
-(2474 trapret:) 56.7907 Tj
+(2474 for\(my $i = 0; $i < 256; $i++\){) 157.2665 Tj
0 -265.8141 Td
-(2475 popal) 52.4222 Tj
+(2475 print " .long vector$i\\n";) 157.2665 Tj
0 -275.3075 Td
-(2476 popl %es) 65.5277 Tj
+(2476 }) 26.2111 Tj
0 -284.8008 Td
-(2477 popl %ds) 65.5277 Tj
+(2477 ) 21.8426 Tj
0 -294.2942 Td
-(2478 addl $0x8, %esp # trapno and errcode) 192.2146 Tj
+(2478 # sample output:) 91.7388 Tj
0 -303.7875 Td
-(2479 iret) 48.0537 Tj
+(2479 # # handlers) 83.0018 Tj
0 -313.2809 Td
-(2480 ) 21.8426 Tj
+(2480 # .globl alltraps) 104.8443 Tj
0 -322.7743 Td
-(2481 # A forked process switches to user mode by calling) 253.3738 Tj
+(2481 # .globl vector0) 100.4758 Tj
0 -332.2676 Td
-(2482 # forkret1\(tf\), where tf is the trap frame to use.) 249.0053 Tj
+(2482 # vector0:) 74.2647 Tj
0 -341.761 Td
-(2483 .globl forkret1) 87.3703 Tj
+(2483 # pushl $0) 83.0018 Tj
0 -351.2543 Td
-(2484 forkret1:) 61.1592 Tj
+(2484 # pushl $0) 83.0018 Tj
0 -360.7477 Td
-(2485 movl 4\(%esp\), %esp) 109.2129 Tj
+(2485 # jmp alltraps) 100.4758 Tj
0 -370.2411 Td
-(2486 jmp trapret) 78.6333 Tj
+(2486 # ...) 52.4222 Tj
0 -379.7344 Td
-(2487 ) 21.8426 Tj
+(2487 #) 26.2111 Tj
0 -389.2278 Td
-(2488 ) 21.8426 Tj
+(2488 # # vector table) 100.4758 Tj
0 -398.7211 Td
-(2489 ) 21.8426 Tj
+(2489 # .data) 61.1592 Tj
0 -408.2145 Td
-(2490 ) 21.8426 Tj
+(2490 # .globl vectors) 100.4758 Tj
0 -417.7079 Td
-(2491 ) 21.8426 Tj
+(2491 # vectors:) 74.2647 Tj
0 -427.2012 Td
-(2492 ) 21.8426 Tj
+(2492 # .long vector0) 104.8443 Tj
0 -436.6946 Td
-(2493 ) 21.8426 Tj
+(2493 # .long vector1) 104.8443 Tj
0 -446.1879 Td
-(2494 ) 21.8426 Tj
+(2494 # .long vector2) 104.8443 Tj
0 -455.6813 Td
-(2495 ) 21.8426 Tj
+(2495 # ...) 52.4222 Tj
0 -465.1747 Td
(2496 ) 21.8426 Tj
0 -474.668 Td
@@ -10446,6 +10529,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -10463,109 +10548,107 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/trap.c Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/trapasm.S Page 1) 174.7406 Tj
0 -28.4801 Td
-(2500 #include "types.h") 100.4758 Tj
+(2500 #define SEG_KCODE 1 // kernel code) 174.7406 Tj
0 -37.9735 Td
-(2501 #include "defs.h") 96.1073 Tj
+(2501 #define SEG_KDATA 2 // kernel data+stack) 200.9517 Tj
0 -47.4668 Td
-(2502 #include "param.h") 100.4758 Tj
+(2502 #define SEG_KCPU 3 // kernel per-cpu data) 209.6887 Tj
0 -56.9602 Td
-(2503 #include "mmu.h") 91.7388 Tj
+(2503 ) 21.8426 Tj
0 -66.4535 Td
-(2504 #include "proc.h") 96.1073 Tj
+(2504 # vectors.S sends all traps here.) 174.7406 Tj
0 -75.9469 Td
-(2505 #include "x86.h") 91.7388 Tj
+(2505 .globl alltraps) 87.3703 Tj
0 -85.4403 Td
-(2506 #include "traps.h") 100.4758 Tj
+(2506 alltraps:) 61.1592 Tj
0 -94.9336 Td
-(2507 #include "spinlock.h") 113.5814 Tj
+(2507 # Build trap frame.) 113.5814 Tj
0 -104.427 Td
-(2508 ) 21.8426 Tj
+(2508 pushl %ds) 69.8962 Tj
0 -113.9203 Td
-(2509 // Interrupt descriptor table \(shared by all CPUs\).) 244.6368 Tj
+(2509 pushl %es) 69.8962 Tj
0 -123.4137 Td
-(2510 struct gatedesc idt[256];) 131.0554 Tj
+(2510 pushl %fs) 69.8962 Tj
0 -132.9071 Td
-(2511 extern uint vectors[]; // in vectors.S: array of 256 entr\
-y pointers) 318.9016 Tj
+(2511 pushl %gs) 69.8962 Tj
0 -142.4004 Td
-(2512 struct spinlock tickslock;) 135.4239 Tj
+(2512 pushal) 56.7907 Tj
0 -151.8938 Td
-(2513 int ticks;) 65.5277 Tj
+(2513 ) 21.8426 Tj
0 -161.3871 Td
-(2514 ) 21.8426 Tj
+(2514 # Set up data and per-cpu segments.) 183.4776 Tj
0 -170.8805 Td
-(2515 void) 39.3166 Tj
+(2515 movw $\(SEG_KDATA<<3\), %ax) 139.7925 Tj
0 -180.3739 Td
-(2516 tvinit\(void\)) 74.2647 Tj
+(2516 movw %ax, %ds) 87.3703 Tj
0 -189.8672 Td
-(2517 {) 26.2111 Tj
+(2517 movw %ax, %es) 87.3703 Tj
0 -199.3606 Td
-(2518 int i;) 56.7907 Tj
+(2518 movw $\(SEG_KCPU<<3\), %ax) 135.4239 Tj
0 -208.8539 Td
-(2519 ) 21.8426 Tj
+(2519 movw %ax, %fs) 87.3703 Tj
0 -218.3473 Td
-(2520 for\(i = 0; i < 256; i++\)) 135.4239 Tj
+(2520 movw %ax, %gs) 87.3703 Tj
0 -227.8407 Td
-(2521 SETGATE\(idt[i], 0, SEG_KCODE<<3, vectors[i], 0\);) 249.0053 Tj
+(2521 ) 21.8426 Tj
0 -237.334 Td
-(2522 SETGATE\(idt[T_SYSCALL], 1, SEG_KCODE<<3, vectors[T_SYSC\
-ALL], DPL_USER\);) 340.7441 Tj
+(2522 # Call trap\(tf\), where tf=%esp) 161.635 Tj
0 -246.8274 Td
-(2523 ) 21.8426 Tj
+(2523 pushl %esp) 74.2647 Tj
0 -256.3207 Td
-(2524 initlock\(&tickslock, "time"\);) 157.2665 Tj
+(2524 call trap) 69.8962 Tj
0 -265.8141 Td
-(2525 }) 26.2111 Tj
+(2525 addl $4, %esp) 87.3703 Tj
0 -275.3075 Td
(2526 ) 21.8426 Tj
0 -284.8008 Td
-(2527 void) 39.3166 Tj
+(2527 # Return falls through to trapret...) 187.8461 Tj
0 -294.2942 Td
-(2528 idtinit\(void\)) 78.6333 Tj
+(2528 .globl trapret) 83.0018 Tj
0 -303.7875 Td
-(2529 {) 26.2111 Tj
+(2529 trapret:) 56.7907 Tj
0 -313.2809 Td
-(2530 lidt\(idt, sizeof\(idt\)\);) 131.0554 Tj
+(2530 popal) 52.4222 Tj
0 -322.7743 Td
-(2531 }) 26.2111 Tj
+(2531 popl %gs) 65.5277 Tj
0 -332.2676 Td
-(2532 ) 21.8426 Tj
+(2532 popl %fs) 65.5277 Tj
0 -341.761 Td
-(2533 void) 39.3166 Tj
+(2533 popl %es) 65.5277 Tj
0 -351.2543 Td
-(2534 trap\(struct trapframe *tf\)) 135.4239 Tj
+(2534 popl %ds) 65.5277 Tj
0 -360.7477 Td
-(2535 {) 26.2111 Tj
+(2535 addl $0x8, %esp # trapno and errcode) 192.2146 Tj
0 -370.2411 Td
-(2536 if\(tf->trapno == T_SYSCALL\){) 152.898 Tj
+(2536 iret) 48.0537 Tj
0 -379.7344 Td
-(2537 if\(cp->killed\)) 100.4758 Tj
+(2537 ) 21.8426 Tj
0 -389.2278 Td
-(2538 exit\(\);) 78.6333 Tj
+(2538 ) 21.8426 Tj
0 -398.7211 Td
-(2539 cp->tf = tf;) 91.7388 Tj
+(2539 ) 21.8426 Tj
0 -408.2145 Td
-(2540 syscall\(\);) 83.0018 Tj
+(2540 ) 21.8426 Tj
0 -417.7079 Td
-(2541 if\(cp->killed\)) 100.4758 Tj
+(2541 ) 21.8426 Tj
0 -427.2012 Td
-(2542 exit\(\);) 78.6333 Tj
+(2542 ) 21.8426 Tj
0 -436.6946 Td
-(2543 return;) 69.8962 Tj
+(2543 ) 21.8426 Tj
0 -446.1879 Td
-(2544 }) 34.9481 Tj
+(2544 ) 21.8426 Tj
0 -455.6813 Td
(2545 ) 21.8426 Tj
0 -465.1747 Td
-(2546 switch\(tf->trapno\){) 113.5814 Tj
+(2546 ) 21.8426 Tj
0 -474.668 Td
-(2547 case IRQ_OFFSET + IRQ_TIMER:) 152.898 Tj
+(2547 ) 21.8426 Tj
0 -484.1614 Td
-(2548 if\(cpu\(\) == 0\){) 104.8443 Tj
+(2548 ) 21.8426 Tj
0 -493.6547 Td
-(2549 acquire\(&tickslock\);) 135.4239 Tj
+(2549 ) 21.8426 Tj
0 -522.1348 Td
(Sheet 25) 34.9481 Tj
Q
@@ -10584,101 +10667,97 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/trap.c Page 2) 161.635 Tj
+(Aug 8 01:04 2009 xv6/trap.c Page 1) 161.635 Tj
0 -28.4801 Td
-(2550 ticks++;) 83.0018 Tj
+(2550 #include "types.h") 100.4758 Tj
0 -37.9735 Td
-(2551 wakeup\(&ticks\);) 113.5814 Tj
+(2551 #include "defs.h") 96.1073 Tj
0 -47.4668 Td
-(2552 release\(&tickslock\);) 135.4239 Tj
+(2552 #include "param.h") 100.4758 Tj
0 -56.9602 Td
-(2553 }) 43.6851 Tj
+(2553 #include "mmu.h") 91.7388 Tj
0 -66.4535 Td
-(2554 lapic_eoi\(\);) 91.7388 Tj
+(2554 #include "proc.h") 96.1073 Tj
0 -75.9469 Td
-(2555 break;) 65.5277 Tj
+(2555 #include "x86.h") 91.7388 Tj
0 -85.4403 Td
-(2556 case IRQ_OFFSET + IRQ_IDE:) 144.161 Tj
+(2556 #include "traps.h") 100.4758 Tj
0 -94.9336 Td
-(2557 ide_intr\(\);) 87.3703 Tj
+(2557 #include "spinlock.h") 113.5814 Tj
0 -104.427 Td
-(2558 lapic_eoi\(\);) 91.7388 Tj
+(2558 ) 21.8426 Tj
0 -113.9203 Td
-(2559 break;) 65.5277 Tj
+(2559 // Interrupt descriptor table \(shared by all CPUs\).) 244.6368 Tj
0 -123.4137 Td
-(2560 case IRQ_OFFSET + IRQ_KBD:) 144.161 Tj
+(2560 struct gatedesc idt[256];) 131.0554 Tj
0 -132.9071 Td
-(2561 kbd_intr\(\);) 87.3703 Tj
+(2561 extern uint vectors[]; // in vectors.S: array of 256 entr\
+y pointers) 318.9016 Tj
0 -142.4004 Td
-(2562 lapic_eoi\(\);) 91.7388 Tj
+(2562 struct spinlock tickslock;) 135.4239 Tj
0 -151.8938 Td
-(2563 break;) 65.5277 Tj
+(2563 int ticks;) 65.5277 Tj
0 -161.3871 Td
-(2564 case IRQ_OFFSET + IRQ_SPURIOUS:) 166.0035 Tj
+(2564 ) 21.8426 Tj
0 -170.8805 Td
-(2565 cprintf\("cpu%d: spurious interrupt at %x:%x\\n",) 244.6368 Tj
+(2565 void) 39.3166 Tj
0 -180.3739 Td
-(2566 cpu\(\), tf->cs, tf->eip\);) 179.1091 Tj
+(2566 tvinit\(void\)) 74.2647 Tj
0 -189.8672 Td
-(2567 lapic_eoi\(\);) 91.7388 Tj
+(2567 {) 26.2111 Tj
0 -199.3606 Td
-(2568 break;) 65.5277 Tj
+(2568 int i;) 56.7907 Tj
0 -208.8539 Td
(2569 ) 21.8426 Tj
0 -218.3473 Td
-(2570 default:) 65.5277 Tj
+(2570 for\(i = 0; i < 256; i++\)) 135.4239 Tj
0 -227.8407 Td
-(2571 if\(cp == 0 || \(tf->cs&3\) == 0\){) 174.7406 Tj
+(2571 SETGATE\(idt[i], 0, SEG_KCODE<<3, vectors[i], 0\);) 249.0053 Tj
0 -237.334 Td
-(2572 // In kernel, it must be our mistake.) 209.6887 Tj
+(2572 SETGATE\(idt[T_SYSCALL], 1, SEG_KCODE<<3, vectors[T_SYSC\
+ALL], DPL_USER\);) 340.7441 Tj
0 -246.8274 Td
-(2573 cprintf\("unexpected trap %d from cpu %d eip %x\\n",) 266.4794 Tj
+(2573 ) 21.8426 Tj
0 -256.3207 Td
-(2574 tf->trapno, cpu\(\), tf->eip\);) 205.3202 Tj
+(2574 initlock\(&tickslock, "time"\);) 157.2665 Tj
0 -265.8141 Td
-(2575 panic\("trap"\);) 109.2129 Tj
+(2575 }) 26.2111 Tj
0 -275.3075 Td
-(2576 }) 43.6851 Tj
+(2576 ) 21.8426 Tj
0 -284.8008 Td
-(2577 // In user space, assume process misbehaved.) 231.5313 Tj
+(2577 void) 39.3166 Tj
0 -294.2942 Td
-(2578 cprintf\("pid %d %s: trap %d err %d on cpu %d eip %x -\
-- kill proc\\n",) 336.3756 Tj
+(2578 idtinit\(void\)) 78.6333 Tj
0 -303.7875 Td
-(2579 cp->pid, cp->name, tf->trapno, tf->err, cpu\(\)\
-, tf->eip\);) 318.9016 Tj
+(2579 {) 26.2111 Tj
0 -313.2809 Td
-(2580 cp->killed = 1;) 104.8443 Tj
+(2580 lidt\(idt, sizeof\(idt\)\);) 131.0554 Tj
0 -322.7743 Td
-(2581 }) 34.9481 Tj
+(2581 }) 26.2111 Tj
0 -332.2676 Td
(2582 ) 21.8426 Tj
0 -341.761 Td
-(2583 // Force process exit if it has been killed and is in us\
-er space.) 314.533 Tj
+(2583 ) 21.8426 Tj
0 -351.2543 Td
-(2584 // \(If it is still executing in the kernel, let it keep\
- running) 305.796 Tj
+(2584 ) 21.8426 Tj
0 -360.7477 Td
-(2585 // until it gets to the regular system call return.\)) 257.7424 Tj
+(2585 ) 21.8426 Tj
0 -370.2411 Td
-(2586 if\(cp && cp->killed && \(tf->cs&3\) == DPL_USER\)) 231.5313 Tj
+(2586 ) 21.8426 Tj
0 -379.7344 Td
-(2587 exit\(\);) 69.8962 Tj
+(2587 ) 21.8426 Tj
0 -389.2278 Td
(2588 ) 21.8426 Tj
0 -398.7211 Td
-(2589 // Force process to give up CPU on clock tick.) 231.5313 Tj
+(2589 ) 21.8426 Tj
0 -408.2145 Td
-(2590 // If interrupts were on while locks held, would need to\
- check nlock.) 332.0071 Tj
+(2590 ) 21.8426 Tj
0 -417.7079 Td
-(2591 if\(cp && cp->state == RUNNING && tf->trapno == IRQ_OFFS\
-ET+IRQ_TIMER\)) 327.6386 Tj
+(2591 ) 21.8426 Tj
0 -427.2012 Td
-(2592 yield\(\);) 74.2647 Tj
+(2592 ) 21.8426 Tj
0 -436.6946 Td
-(2593 }) 26.2111 Tj
+(2593 ) 21.8426 Tj
0 -446.1879 Td
(2594 ) 21.8426 Tj
0 -455.6813 Td
@@ -10721,6 +10800,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -10738,107 +10819,107 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/syscall.h Page 1) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/trap.c Page 2) 161.635 Tj
0 -28.4801 Td
-(2600 // System call numbers) 117.9499 Tj
+(2600 void) 39.3166 Tj
0 -37.9735 Td
-(2601 #define SYS_fork 1) 113.5814 Tj
+(2601 trap\(struct trapframe *tf\)) 135.4239 Tj
0 -47.4668 Td
-(2602 #define SYS_exit 2) 113.5814 Tj
+(2602 {) 26.2111 Tj
0 -56.9602 Td
-(2603 #define SYS_wait 3) 113.5814 Tj
+(2603 if\(tf->trapno == T_SYSCALL\){) 152.898 Tj
0 -66.4535 Td
-(2604 #define SYS_pipe 4) 113.5814 Tj
+(2604 if\(cp->killed\)) 100.4758 Tj
0 -75.9469 Td
-(2605 #define SYS_write 5) 113.5814 Tj
+(2605 exit\(\);) 78.6333 Tj
0 -85.4403 Td
-(2606 #define SYS_read 6) 113.5814 Tj
+(2606 cp->tf = tf;) 91.7388 Tj
0 -94.9336 Td
-(2607 #define SYS_close 7) 113.5814 Tj
+(2607 syscall\(\);) 83.0018 Tj
0 -104.427 Td
-(2608 #define SYS_kill 8) 113.5814 Tj
+(2608 if\(cp->killed\)) 100.4758 Tj
0 -113.9203 Td
-(2609 #define SYS_exec 9) 113.5814 Tj
+(2609 exit\(\);) 78.6333 Tj
0 -123.4137 Td
-(2610 #define SYS_open 10) 113.5814 Tj
+(2610 return;) 69.8962 Tj
0 -132.9071 Td
-(2611 #define SYS_mknod 11) 113.5814 Tj
+(2611 }) 34.9481 Tj
0 -142.4004 Td
-(2612 #define SYS_unlink 12) 113.5814 Tj
+(2612 ) 21.8426 Tj
0 -151.8938 Td
-(2613 #define SYS_fstat 13) 113.5814 Tj
+(2613 switch\(tf->trapno\){) 113.5814 Tj
0 -161.3871 Td
-(2614 #define SYS_link 14) 113.5814 Tj
+(2614 case T_IRQ0 + IRQ_TIMER:) 135.4239 Tj
0 -170.8805 Td
-(2615 #define SYS_mkdir 15) 113.5814 Tj
+(2615 if\(cpu\(\) == 0\){) 104.8443 Tj
0 -180.3739 Td
-(2616 #define SYS_chdir 16) 113.5814 Tj
+(2616 acquire\(&tickslock\);) 135.4239 Tj
0 -189.8672 Td
-(2617 #define SYS_dup 17) 113.5814 Tj
+(2617 ticks++;) 83.0018 Tj
0 -199.3606 Td
-(2618 #define SYS_getpid 18) 113.5814 Tj
+(2618 wakeup\(&ticks\);) 113.5814 Tj
0 -208.8539 Td
-(2619 #define SYS_sbrk 19) 113.5814 Tj
+(2619 release\(&tickslock\);) 135.4239 Tj
0 -218.3473 Td
-(2620 #define SYS_sleep 20) 113.5814 Tj
+(2620 }) 43.6851 Tj
0 -227.8407 Td
-(2621 ) 21.8426 Tj
+(2621 lapiceoi\(\);) 87.3703 Tj
0 -237.334 Td
-(2622 ) 21.8426 Tj
+(2622 break;) 65.5277 Tj
0 -246.8274 Td
-(2623 ) 21.8426 Tj
+(2623 case T_IRQ0 + IRQ_IDE:) 126.6869 Tj
0 -256.3207 Td
-(2624 ) 21.8426 Tj
+(2624 ideintr\(\);) 83.0018 Tj
0 -265.8141 Td
-(2625 ) 21.8426 Tj
+(2625 lapiceoi\(\);) 87.3703 Tj
0 -275.3075 Td
-(2626 ) 21.8426 Tj
+(2626 break;) 65.5277 Tj
0 -284.8008 Td
-(2627 ) 21.8426 Tj
+(2627 case T_IRQ0 + IRQ_KBD:) 126.6869 Tj
0 -294.2942 Td
-(2628 ) 21.8426 Tj
+(2628 kbdintr\(\);) 83.0018 Tj
0 -303.7875 Td
-(2629 ) 21.8426 Tj
+(2629 lapiceoi\(\);) 87.3703 Tj
0 -313.2809 Td
-(2630 ) 21.8426 Tj
+(2630 break;) 65.5277 Tj
0 -322.7743 Td
-(2631 ) 21.8426 Tj
+(2631 case T_IRQ0 + IRQ_COM1:) 131.0554 Tj
0 -332.2676 Td
-(2632 ) 21.8426 Tj
+(2632 uartintr\(\);) 87.3703 Tj
0 -341.761 Td
-(2633 ) 21.8426 Tj
+(2633 lapiceoi\(\);) 87.3703 Tj
0 -351.2543 Td
-(2634 ) 21.8426 Tj
+(2634 break;) 65.5277 Tj
0 -360.7477 Td
-(2635 ) 21.8426 Tj
+(2635 case T_IRQ0 + 7:) 100.4758 Tj
0 -370.2411 Td
-(2636 ) 21.8426 Tj
+(2636 case T_IRQ0 + IRQ_SPURIOUS:) 148.5295 Tj
0 -379.7344 Td
-(2637 ) 21.8426 Tj
+(2637 cprintf\("cpu%d: spurious interrupt at %x:%x\\n",) 244.6368 Tj
0 -389.2278 Td
-(2638 ) 21.8426 Tj
+(2638 cpu\(\), tf->cs, tf->eip\);) 179.1091 Tj
0 -398.7211 Td
-(2639 ) 21.8426 Tj
+(2639 lapiceoi\(\);) 87.3703 Tj
0 -408.2145 Td
-(2640 ) 21.8426 Tj
+(2640 break;) 65.5277 Tj
0 -417.7079 Td
(2641 ) 21.8426 Tj
0 -427.2012 Td
-(2642 ) 21.8426 Tj
+(2642 default:) 65.5277 Tj
0 -436.6946 Td
-(2643 ) 21.8426 Tj
+(2643 if\(cp == 0 || \(tf->cs&3\) == 0\){) 174.7406 Tj
0 -446.1879 Td
-(2644 ) 21.8426 Tj
+(2644 // In kernel, it must be our mistake.) 209.6887 Tj
0 -455.6813 Td
-(2645 ) 21.8426 Tj
+(2645 cprintf\("unexpected trap %d from cpu %d eip %x\\n",) 266.4794 Tj
0 -465.1747 Td
-(2646 ) 21.8426 Tj
+(2646 tf->trapno, cpu\(\), tf->eip\);) 205.3202 Tj
0 -474.668 Td
-(2647 ) 21.8426 Tj
+(2647 panic\("trap"\);) 109.2129 Tj
0 -484.1614 Td
-(2648 ) 21.8426 Tj
+(2648 }) 43.6851 Tj
0 -493.6547 Td
-(2649 ) 21.8426 Tj
+(2649 // In user space, assume process misbehaved.) 231.5313 Tj
0 -522.1348 Td
(Sheet 26) 34.9481 Tj
Q
@@ -10857,106 +10938,109 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/syscall.c Page 1) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/trap.c Page 3) 161.635 Tj
0 -28.4801 Td
-(2650 #include "types.h") 100.4758 Tj
+(2650 cprintf\("pid %d %s: trap %d err %d on cpu %d eip %x -\
+- kill proc\\n",) 336.3756 Tj
0 -37.9735 Td
-(2651 #include "defs.h") 96.1073 Tj
+(2651 cp->pid, cp->name, tf->trapno, tf->err, cpu\(\)\
+, tf->eip\);) 318.9016 Tj
0 -47.4668 Td
-(2652 #include "param.h") 100.4758 Tj
+(2652 cp->killed = 1;) 104.8443 Tj
0 -56.9602 Td
-(2653 #include "mmu.h") 91.7388 Tj
+(2653 }) 34.9481 Tj
0 -66.4535 Td
-(2654 #include "proc.h") 96.1073 Tj
+(2654 ) 21.8426 Tj
0 -75.9469 Td
-(2655 #include "x86.h") 91.7388 Tj
+(2655 // Force process exit if it has been killed and is in us\
+er space.) 314.533 Tj
0 -85.4403 Td
-(2656 #include "syscall.h") 109.2129 Tj
+(2656 // \(If it is still executing in the kernel, let it keep\
+ running) 305.796 Tj
0 -94.9336 Td
-(2657 ) 21.8426 Tj
+(2657 // until it gets to the regular system call return.\)) 257.7424 Tj
0 -104.427 Td
-(2658 // User code makes a system call with INT T_SYSCALL.) 249.0053 Tj
+(2658 if\(cp && cp->killed && \(tf->cs&3\) == DPL_USER\)) 231.5313 Tj
0 -113.9203 Td
-(2659 // System call number in %eax.) 152.898 Tj
+(2659 exit\(\);) 69.8962 Tj
0 -123.4137 Td
-(2660 // Arguments on the stack, from the user call to the C) 257.7424 Tj
+(2660 ) 21.8426 Tj
0 -132.9071 Td
-(2661 // library system call function. The saved user %esp point\
-s) 279.5849 Tj
+(2661 // Force process to give up CPU on clock tick.) 231.5313 Tj
0 -142.4004 Td
-(2662 // to a saved program counter, and then the first argument\
-.) 279.5849 Tj
+(2662 // If interrupts were on while locks held, would need to\
+ check nlock.) 332.0071 Tj
0 -151.8938 Td
-(2663 ) 21.8426 Tj
+(2663 if\(cp && cp->state == RUNNING && tf->trapno == T_IRQ0+I\
+RQ_TIMER\)) 310.1645 Tj
0 -161.3871 Td
-(2664 // Fetch the int at addr from process p.) 196.5831 Tj
+(2664 yield\(\);) 74.2647 Tj
0 -170.8805 Td
-(2665 int) 34.9481 Tj
+(2665 ) 21.8426 Tj
0 -180.3739 Td
-(2666 fetchint\(struct proc *p, uint addr, int *ip\)) 214.0572 Tj
+(2666 // Check if the process has been killed since we yielded) 275.2164 Tj
0 -189.8672 Td
-(2667 {) 26.2111 Tj
+(2667 if\(cp && cp->killed && \(tf->cs&3\) == DPL_USER\)) 231.5313 Tj
0 -199.3606 Td
-(2668 if\(addr >= p->sz || addr+4 > p->sz\)) 183.4776 Tj
+(2668 exit\(\);) 69.8962 Tj
0 -208.8539 Td
-(2669 return -1;) 83.0018 Tj
+(2669 }) 26.2111 Tj
0 -218.3473 Td
-(2670 *ip = *\(int*\)\(p->mem + addr\);) 157.2665 Tj
+(2670 ) 21.8426 Tj
0 -227.8407 Td
-(2671 return 0;) 69.8962 Tj
+(2671 ) 21.8426 Tj
0 -237.334 Td
-(2672 }) 26.2111 Tj
+(2672 ) 21.8426 Tj
0 -246.8274 Td
(2673 ) 21.8426 Tj
0 -256.3207 Td
-(2674 // Fetch the nul-terminated string at addr from process p.) 275.2164 Tj
+(2674 ) 21.8426 Tj
0 -265.8141 Td
-(2675 // Doesn't actually copy the string - just sets *pp to poi\
-nt at it.) 314.533 Tj
+(2675 ) 21.8426 Tj
0 -275.3075 Td
-(2676 // Returns length of string, not including nul.) 227.1628 Tj
+(2676 ) 21.8426 Tj
0 -284.8008 Td
-(2677 int) 34.9481 Tj
+(2677 ) 21.8426 Tj
0 -294.2942 Td
-(2678 fetchstr\(struct proc *p, uint addr, char **pp\)) 222.7942 Tj
+(2678 ) 21.8426 Tj
0 -303.7875 Td
-(2679 {) 26.2111 Tj
+(2679 ) 21.8426 Tj
0 -313.2809 Td
-(2680 char *s, *ep;) 87.3703 Tj
+(2680 ) 21.8426 Tj
0 -322.7743 Td
(2681 ) 21.8426 Tj
0 -332.2676 Td
-(2682 if\(addr >= p->sz\)) 104.8443 Tj
+(2682 ) 21.8426 Tj
0 -341.761 Td
-(2683 return -1;) 83.0018 Tj
+(2683 ) 21.8426 Tj
0 -351.2543 Td
-(2684 *pp = p->mem + addr;) 117.9499 Tj
+(2684 ) 21.8426 Tj
0 -360.7477 Td
-(2685 ep = p->mem + p->sz;) 117.9499 Tj
+(2685 ) 21.8426 Tj
0 -370.2411 Td
-(2686 for\(s = *pp; s < ep; s++\)) 139.7925 Tj
+(2686 ) 21.8426 Tj
0 -379.7344 Td
-(2687 if\(*s == 0\)) 87.3703 Tj
+(2687 ) 21.8426 Tj
0 -389.2278 Td
-(2688 return s - *pp;) 113.5814 Tj
+(2688 ) 21.8426 Tj
0 -398.7211 Td
-(2689 return -1;) 74.2647 Tj
+(2689 ) 21.8426 Tj
0 -408.2145 Td
-(2690 }) 26.2111 Tj
+(2690 ) 21.8426 Tj
0 -417.7079 Td
(2691 ) 21.8426 Tj
0 -427.2012 Td
-(2692 // Fetch the nth 32-bit system call argument.) 218.4257 Tj
+(2692 ) 21.8426 Tj
0 -436.6946 Td
-(2693 int) 34.9481 Tj
+(2693 ) 21.8426 Tj
0 -446.1879 Td
-(2694 argint\(int n, int *ip\)) 117.9499 Tj
+(2694 ) 21.8426 Tj
0 -455.6813 Td
-(2695 {) 26.2111 Tj
+(2695 ) 21.8426 Tj
0 -465.1747 Td
-(2696 return fetchint\(cp, cp->tf->esp + 4 + 4*n, ip\);) 235.8998 Tj
+(2696 ) 21.8426 Tj
0 -474.668 Td
-(2697 }) 26.2111 Tj
+(2697 ) 21.8426 Tj
0 -484.1614 Td
(2698 ) 21.8426 Tj
0 -493.6547 Td
@@ -10991,6 +11075,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -11008,110 +11094,105 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/syscall.c Page 2) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/syscall.h Page 1) 174.7406 Tj
0 -28.4801 Td
-(2700 // Fetch the nth word-sized system call argument as a poin\
-ter) 288.322 Tj
+(2700 // System call numbers) 117.9499 Tj
0 -37.9735 Td
-(2701 // to a block of memory of size n bytes. Check that the p\
-ointer) 301.4275 Tj
+(2701 #define SYS_fork 1) 113.5814 Tj
0 -47.4668 Td
-(2702 // lies within the process address space.) 200.9517 Tj
+(2702 #define SYS_exit 2) 113.5814 Tj
0 -56.9602 Td
-(2703 int) 34.9481 Tj
+(2703 #define SYS_wait 3) 113.5814 Tj
0 -66.4535 Td
-(2704 argptr\(int n, char **pp, int size\)) 170.3721 Tj
+(2704 #define SYS_pipe 4) 113.5814 Tj
0 -75.9469 Td
-(2705 {) 26.2111 Tj
+(2705 #define SYS_write 5) 113.5814 Tj
0 -85.4403 Td
-(2706 int i;) 56.7907 Tj
+(2706 #define SYS_read 6) 113.5814 Tj
0 -94.9336 Td
-(2707 ) 21.8426 Tj
+(2707 #define SYS_close 7) 113.5814 Tj
0 -104.427 Td
-(2708 if\(argint\(n, &i\) < 0\)) 122.3184 Tj
+(2708 #define SYS_kill 8) 113.5814 Tj
0 -113.9203 Td
-(2709 return -1;) 83.0018 Tj
+(2709 #define SYS_exec 9) 113.5814 Tj
0 -123.4137 Td
-(2710 if\(\(uint\)i >= cp->sz || \(uint\)i+size >= cp->sz\)) 235.8998 Tj
+(2710 #define SYS_open 10) 113.5814 Tj
0 -132.9071 Td
-(2711 return -1;) 83.0018 Tj
+(2711 #define SYS_mknod 11) 113.5814 Tj
0 -142.4004 Td
-(2712 *pp = cp->mem + i;) 109.2129 Tj
+(2712 #define SYS_unlink 12) 113.5814 Tj
0 -151.8938 Td
-(2713 return 0;) 69.8962 Tj
+(2713 #define SYS_fstat 13) 113.5814 Tj
0 -161.3871 Td
-(2714 }) 26.2111 Tj
+(2714 #define SYS_link 14) 113.5814 Tj
0 -170.8805 Td
-(2715 ) 21.8426 Tj
+(2715 #define SYS_mkdir 15) 113.5814 Tj
0 -180.3739 Td
-(2716 // Fetch the nth word-sized system call argument as a stri\
-ng pointer.) 323.2701 Tj
+(2716 #define SYS_chdir 16) 113.5814 Tj
0 -189.8672 Td
-(2717 // Check that the pointer is valid and the string is nul-t\
-erminated.) 318.9016 Tj
+(2717 #define SYS_dup 17) 113.5814 Tj
0 -199.3606 Td
-(2718 // \(There is no shared writable memory, so the string can\
-'t change) 310.1645 Tj
+(2718 #define SYS_getpid 18) 113.5814 Tj
0 -208.8539 Td
-(2719 // between this check and being used by the kernel.\)) 249.0053 Tj
+(2719 #define SYS_sbrk 19) 113.5814 Tj
0 -218.3473 Td
-(2720 int) 34.9481 Tj
+(2720 #define SYS_sleep 20) 113.5814 Tj
0 -227.8407 Td
-(2721 argstr\(int n, char **pp\)) 126.6869 Tj
+(2721 ) 21.8426 Tj
0 -237.334 Td
-(2722 {) 26.2111 Tj
+(2722 ) 21.8426 Tj
0 -246.8274 Td
-(2723 int addr;) 69.8962 Tj
+(2723 ) 21.8426 Tj
0 -256.3207 Td
-(2724 if\(argint\(n, &addr\) < 0\)) 135.4239 Tj
+(2724 ) 21.8426 Tj
0 -265.8141 Td
-(2725 return -1;) 83.0018 Tj
+(2725 ) 21.8426 Tj
0 -275.3075 Td
-(2726 return fetchstr\(cp, addr, pp\);) 161.635 Tj
+(2726 ) 21.8426 Tj
0 -284.8008 Td
-(2727 }) 26.2111 Tj
+(2727 ) 21.8426 Tj
0 -294.2942 Td
(2728 ) 21.8426 Tj
0 -303.7875 Td
-(2729 extern int sys_chdir\(void\);) 139.7925 Tj
+(2729 ) 21.8426 Tj
0 -313.2809 Td
-(2730 extern int sys_close\(void\);) 139.7925 Tj
+(2730 ) 21.8426 Tj
0 -322.7743 Td
-(2731 extern int sys_dup\(void\);) 131.0554 Tj
+(2731 ) 21.8426 Tj
0 -332.2676 Td
-(2732 extern int sys_exec\(void\);) 135.4239 Tj
+(2732 ) 21.8426 Tj
0 -341.761 Td
-(2733 extern int sys_exit\(void\);) 135.4239 Tj
+(2733 ) 21.8426 Tj
0 -351.2543 Td
-(2734 extern int sys_fork\(void\);) 135.4239 Tj
+(2734 ) 21.8426 Tj
0 -360.7477 Td
-(2735 extern int sys_fstat\(void\);) 139.7925 Tj
+(2735 ) 21.8426 Tj
0 -370.2411 Td
-(2736 extern int sys_getpid\(void\);) 144.161 Tj
+(2736 ) 21.8426 Tj
0 -379.7344 Td
-(2737 extern int sys_kill\(void\);) 135.4239 Tj
+(2737 ) 21.8426 Tj
0 -389.2278 Td
-(2738 extern int sys_link\(void\);) 135.4239 Tj
+(2738 ) 21.8426 Tj
0 -398.7211 Td
-(2739 extern int sys_mkdir\(void\);) 139.7925 Tj
+(2739 ) 21.8426 Tj
0 -408.2145 Td
-(2740 extern int sys_mknod\(void\);) 139.7925 Tj
+(2740 ) 21.8426 Tj
0 -417.7079 Td
-(2741 extern int sys_open\(void\);) 135.4239 Tj
+(2741 ) 21.8426 Tj
0 -427.2012 Td
-(2742 extern int sys_pipe\(void\);) 135.4239 Tj
+(2742 ) 21.8426 Tj
0 -436.6946 Td
-(2743 extern int sys_read\(void\);) 135.4239 Tj
+(2743 ) 21.8426 Tj
0 -446.1879 Td
-(2744 extern int sys_sbrk\(void\);) 135.4239 Tj
+(2744 ) 21.8426 Tj
0 -455.6813 Td
-(2745 extern int sys_sleep\(void\);) 139.7925 Tj
+(2745 ) 21.8426 Tj
0 -465.1747 Td
-(2746 extern int sys_unlink\(void\);) 144.161 Tj
+(2746 ) 21.8426 Tj
0 -474.668 Td
-(2747 extern int sys_wait\(void\);) 135.4239 Tj
+(2747 ) 21.8426 Tj
0 -484.1614 Td
-(2748 extern int sys_write\(void\);) 139.7925 Tj
+(2748 ) 21.8426 Tj
0 -493.6547 Td
(2749 ) 21.8426 Tj
0 -522.1348 Td
@@ -11132,104 +11213,106 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/syscall.c Page 3) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/syscall.c Page 1) 174.7406 Tj
0 -28.4801 Td
-(2750 static int \(*syscalls[]\)\(void\) = {) 170.3721 Tj
+(2750 #include "types.h") 100.4758 Tj
0 -37.9735 Td
-(2751 [SYS_chdir] sys_chdir,) 126.6869 Tj
+(2751 #include "defs.h") 96.1073 Tj
0 -47.4668 Td
-(2752 [SYS_close] sys_close,) 126.6869 Tj
+(2752 #include "param.h") 100.4758 Tj
0 -56.9602 Td
-(2753 [SYS_dup] sys_dup,) 117.9499 Tj
+(2753 #include "mmu.h") 91.7388 Tj
0 -66.4535 Td
-(2754 [SYS_exec] sys_exec,) 122.3184 Tj
+(2754 #include "proc.h") 96.1073 Tj
0 -75.9469 Td
-(2755 [SYS_exit] sys_exit,) 122.3184 Tj
+(2755 #include "x86.h") 91.7388 Tj
0 -85.4403 Td
-(2756 [SYS_fork] sys_fork,) 122.3184 Tj
+(2756 #include "syscall.h") 109.2129 Tj
0 -94.9336 Td
-(2757 [SYS_fstat] sys_fstat,) 126.6869 Tj
+(2757 ) 21.8426 Tj
0 -104.427 Td
-(2758 [SYS_getpid] sys_getpid,) 131.0554 Tj
+(2758 // User code makes a system call with INT T_SYSCALL.) 249.0053 Tj
0 -113.9203 Td
-(2759 [SYS_kill] sys_kill,) 122.3184 Tj
+(2759 // System call number in %eax.) 152.898 Tj
0 -123.4137 Td
-(2760 [SYS_link] sys_link,) 122.3184 Tj
+(2760 // Arguments on the stack, from the user call to the C) 257.7424 Tj
0 -132.9071 Td
-(2761 [SYS_mkdir] sys_mkdir,) 126.6869 Tj
+(2761 // library system call function. The saved user %esp point\
+s) 279.5849 Tj
0 -142.4004 Td
-(2762 [SYS_mknod] sys_mknod,) 126.6869 Tj
+(2762 // to a saved program counter, and then the first argument\
+.) 279.5849 Tj
0 -151.8938 Td
-(2763 [SYS_open] sys_open,) 122.3184 Tj
+(2763 ) 21.8426 Tj
0 -161.3871 Td
-(2764 [SYS_pipe] sys_pipe,) 122.3184 Tj
+(2764 // Fetch the int at addr from process p.) 196.5831 Tj
0 -170.8805 Td
-(2765 [SYS_read] sys_read,) 122.3184 Tj
+(2765 int) 34.9481 Tj
0 -180.3739 Td
-(2766 [SYS_sbrk] sys_sbrk,) 122.3184 Tj
+(2766 fetchint\(struct proc *p, uint addr, int *ip\)) 214.0572 Tj
0 -189.8672 Td
-(2767 [SYS_sleep] sys_sleep,) 126.6869 Tj
+(2767 {) 26.2111 Tj
0 -199.3606 Td
-(2768 [SYS_unlink] sys_unlink,) 131.0554 Tj
+(2768 if\(addr >= p->sz || addr+4 > p->sz\)) 183.4776 Tj
0 -208.8539 Td
-(2769 [SYS_wait] sys_wait,) 122.3184 Tj
+(2769 return -1;) 83.0018 Tj
0 -218.3473 Td
-(2770 [SYS_write] sys_write,) 126.6869 Tj
+(2770 *ip = *\(int*\)\(p->mem + addr\);) 157.2665 Tj
0 -227.8407 Td
-(2771 };) 30.5796 Tj
+(2771 return 0;) 69.8962 Tj
0 -237.334 Td
-(2772 ) 21.8426 Tj
+(2772 }) 26.2111 Tj
0 -246.8274 Td
-(2773 void) 39.3166 Tj
+(2773 ) 21.8426 Tj
0 -256.3207 Td
-(2774 syscall\(void\)) 78.6333 Tj
+(2774 // Fetch the nul-terminated string at addr from process p.) 275.2164 Tj
0 -265.8141 Td
-(2775 {) 26.2111 Tj
+(2775 // Doesn't actually copy the string - just sets *pp to poi\
+nt at it.) 314.533 Tj
0 -275.3075 Td
-(2776 int num;) 65.5277 Tj
+(2776 // Returns length of string, not including nul.) 227.1628 Tj
0 -284.8008 Td
-(2777 ) 21.8426 Tj
+(2777 int) 34.9481 Tj
0 -294.2942 Td
-(2778 num = cp->tf->eax;) 109.2129 Tj
+(2778 fetchstr\(struct proc *p, uint addr, char **pp\)) 222.7942 Tj
0 -303.7875 Td
-(2779 if\(num >= 0 && num < NELEM\(syscalls\) && syscalls[num]\
-\)) 266.4794 Tj
+(2779 {) 26.2111 Tj
0 -313.2809 Td
-(2780 cp->tf->eax = syscalls[num]\(\);) 170.3721 Tj
+(2780 char *s, *ep;) 87.3703 Tj
0 -322.7743 Td
-(2781 else {) 56.7907 Tj
+(2781 ) 21.8426 Tj
0 -332.2676 Td
-(2782 cprintf\("%d %s: unknown sys call %d\\n",) 209.6887 Tj
+(2782 if\(addr >= p->sz\)) 104.8443 Tj
0 -341.761 Td
-(2783 cp->pid, cp->name, num\);) 179.1091 Tj
+(2783 return -1;) 83.0018 Tj
0 -351.2543 Td
-(2784 cp->tf->eax = -1;) 113.5814 Tj
+(2784 *pp = p->mem + addr;) 117.9499 Tj
0 -360.7477 Td
-(2785 }) 34.9481 Tj
+(2785 ep = p->mem + p->sz;) 117.9499 Tj
0 -370.2411 Td
-(2786 }) 26.2111 Tj
+(2786 for\(s = *pp; s < ep; s++\)) 139.7925 Tj
0 -379.7344 Td
-(2787 ) 21.8426 Tj
+(2787 if\(*s == 0\)) 87.3703 Tj
0 -389.2278 Td
-(2788 ) 21.8426 Tj
+(2788 return s - *pp;) 113.5814 Tj
0 -398.7211 Td
-(2789 ) 21.8426 Tj
+(2789 return -1;) 74.2647 Tj
0 -408.2145 Td
-(2790 ) 21.8426 Tj
+(2790 }) 26.2111 Tj
0 -417.7079 Td
(2791 ) 21.8426 Tj
0 -427.2012 Td
-(2792 ) 21.8426 Tj
+(2792 // Fetch the nth 32-bit system call argument.) 218.4257 Tj
0 -436.6946 Td
-(2793 ) 21.8426 Tj
+(2793 int) 34.9481 Tj
0 -446.1879 Td
-(2794 ) 21.8426 Tj
+(2794 argint\(int n, int *ip\)) 117.9499 Tj
0 -455.6813 Td
-(2795 ) 21.8426 Tj
+(2795 {) 26.2111 Tj
0 -465.1747 Td
-(2796 ) 21.8426 Tj
+(2796 return fetchint\(cp, cp->tf->esp + 4 + 4*n, ip\);) 235.8998 Tj
0 -474.668 Td
-(2797 ) 21.8426 Tj
+(2797 }) 26.2111 Tj
0 -484.1614 Td
(2798 ) 21.8426 Tj
0 -493.6547 Td
@@ -11264,6 +11347,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -11281,105 +11366,110 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysproc.c Page 1) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/syscall.c Page 2) 174.7406 Tj
0 -28.4801 Td
-(2800 #include "types.h") 100.4758 Tj
+(2800 // Fetch the nth word-sized system call argument as a poin\
+ter) 288.322 Tj
0 -37.9735 Td
-(2801 #include "defs.h") 96.1073 Tj
+(2801 // to a block of memory of size n bytes. Check that the p\
+ointer) 301.4275 Tj
0 -47.4668 Td
-(2802 #include "param.h") 100.4758 Tj
+(2802 // lies within the process address space.) 200.9517 Tj
0 -56.9602 Td
-(2803 #include "mmu.h") 91.7388 Tj
+(2803 int) 34.9481 Tj
0 -66.4535 Td
-(2804 #include "proc.h") 96.1073 Tj
+(2804 argptr\(int n, char **pp, int size\)) 170.3721 Tj
0 -75.9469 Td
-(2805 ) 21.8426 Tj
+(2805 {) 26.2111 Tj
0 -85.4403 Td
-(2806 int) 34.9481 Tj
+(2806 int i;) 56.7907 Tj
0 -94.9336 Td
-(2807 sys_fork\(void\)) 83.0018 Tj
+(2807 ) 21.8426 Tj
0 -104.427 Td
-(2808 {) 26.2111 Tj
+(2808 if\(argint\(n, &i\) < 0\)) 122.3184 Tj
0 -113.9203 Td
-(2809 int pid;) 65.5277 Tj
+(2809 return -1;) 83.0018 Tj
0 -123.4137 Td
-(2810 struct proc *np;) 100.4758 Tj
+(2810 if\(\(uint\)i >= cp->sz || \(uint\)i+size >= cp->sz\)) 235.8998 Tj
0 -132.9071 Td
-(2811 ) 21.8426 Tj
+(2811 return -1;) 83.0018 Tj
0 -142.4004 Td
-(2812 if\(\(np = copyproc\(cp\)\) == 0\)) 152.898 Tj
+(2812 *pp = cp->mem + i;) 109.2129 Tj
0 -151.8938 Td
-(2813 return -1;) 83.0018 Tj
+(2813 return 0;) 69.8962 Tj
0 -161.3871 Td
-(2814 pid = np->pid;) 91.7388 Tj
+(2814 }) 26.2111 Tj
0 -170.8805 Td
-(2815 np->state = RUNNABLE;) 122.3184 Tj
+(2815 ) 21.8426 Tj
0 -180.3739 Td
-(2816 return pid;) 78.6333 Tj
+(2816 // Fetch the nth word-sized system call argument as a stri\
+ng pointer.) 323.2701 Tj
0 -189.8672 Td
-(2817 }) 26.2111 Tj
+(2817 // Check that the pointer is valid and the string is nul-t\
+erminated.) 318.9016 Tj
0 -199.3606 Td
-(2818 ) 21.8426 Tj
+(2818 // \(There is no shared writable memory, so the string can\
+'t change) 310.1645 Tj
0 -208.8539 Td
-(2819 int) 34.9481 Tj
+(2819 // between this check and being used by the kernel.\)) 249.0053 Tj
0 -218.3473 Td
-(2820 sys_exit\(void\)) 83.0018 Tj
+(2820 int) 34.9481 Tj
0 -227.8407 Td
-(2821 {) 26.2111 Tj
+(2821 argstr\(int n, char **pp\)) 126.6869 Tj
0 -237.334 Td
-(2822 exit\(\);) 61.1592 Tj
+(2822 {) 26.2111 Tj
0 -246.8274 Td
-(2823 return 0; // not reached) 139.7925 Tj
+(2823 int addr;) 69.8962 Tj
0 -256.3207 Td
-(2824 }) 26.2111 Tj
+(2824 if\(argint\(n, &addr\) < 0\)) 135.4239 Tj
0 -265.8141 Td
-(2825 ) 21.8426 Tj
+(2825 return -1;) 83.0018 Tj
0 -275.3075 Td
-(2826 int) 34.9481 Tj
+(2826 return fetchstr\(cp, addr, pp\);) 161.635 Tj
0 -284.8008 Td
-(2827 sys_wait\(void\)) 83.0018 Tj
+(2827 }) 26.2111 Tj
0 -294.2942 Td
-(2828 {) 26.2111 Tj
+(2828 ) 21.8426 Tj
0 -303.7875 Td
-(2829 return wait\(\);) 91.7388 Tj
+(2829 extern int sys_chdir\(void\);) 139.7925 Tj
0 -313.2809 Td
-(2830 }) 26.2111 Tj
+(2830 extern int sys_close\(void\);) 139.7925 Tj
0 -322.7743 Td
-(2831 ) 21.8426 Tj
+(2831 extern int sys_dup\(void\);) 131.0554 Tj
0 -332.2676 Td
-(2832 int) 34.9481 Tj
+(2832 extern int sys_exec\(void\);) 135.4239 Tj
0 -341.761 Td
-(2833 sys_kill\(void\)) 83.0018 Tj
+(2833 extern int sys_exit\(void\);) 135.4239 Tj
0 -351.2543 Td
-(2834 {) 26.2111 Tj
+(2834 extern int sys_fork\(void\);) 135.4239 Tj
0 -360.7477 Td
-(2835 int pid;) 65.5277 Tj
+(2835 extern int sys_fstat\(void\);) 139.7925 Tj
0 -370.2411 Td
-(2836 ) 21.8426 Tj
+(2836 extern int sys_getpid\(void\);) 144.161 Tj
0 -379.7344 Td
-(2837 if\(argint\(0, &pid\) < 0\)) 131.0554 Tj
+(2837 extern int sys_kill\(void\);) 135.4239 Tj
0 -389.2278 Td
-(2838 return -1;) 83.0018 Tj
+(2838 extern int sys_link\(void\);) 135.4239 Tj
0 -398.7211 Td
-(2839 return kill\(pid\);) 104.8443 Tj
+(2839 extern int sys_mkdir\(void\);) 139.7925 Tj
0 -408.2145 Td
-(2840 }) 26.2111 Tj
+(2840 extern int sys_mknod\(void\);) 139.7925 Tj
0 -417.7079 Td
-(2841 ) 21.8426 Tj
+(2841 extern int sys_open\(void\);) 135.4239 Tj
0 -427.2012 Td
-(2842 int) 34.9481 Tj
+(2842 extern int sys_pipe\(void\);) 135.4239 Tj
0 -436.6946 Td
-(2843 sys_getpid\(void\)) 91.7388 Tj
+(2843 extern int sys_read\(void\);) 135.4239 Tj
0 -446.1879 Td
-(2844 {) 26.2111 Tj
+(2844 extern int sys_sbrk\(void\);) 135.4239 Tj
0 -455.6813 Td
-(2845 return cp->pid;) 96.1073 Tj
+(2845 extern int sys_sleep\(void\);) 139.7925 Tj
0 -465.1747 Td
-(2846 }) 26.2111 Tj
+(2846 extern int sys_unlink\(void\);) 144.161 Tj
0 -474.668 Td
-(2847 ) 21.8426 Tj
+(2847 extern int sys_wait\(void\);) 135.4239 Tj
0 -484.1614 Td
-(2848 ) 21.8426 Tj
+(2848 extern int sys_write\(void\);) 139.7925 Tj
0 -493.6547 Td
(2849 ) 21.8426 Tj
0 -522.1348 Td
@@ -11400,81 +11490,82 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysproc.c Page 2) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/syscall.c Page 3) 174.7406 Tj
0 -28.4801 Td
-(2850 int) 34.9481 Tj
+(2850 static int \(*syscalls[]\)\(void\) = {) 170.3721 Tj
0 -37.9735 Td
-(2851 sys_sbrk\(void\)) 83.0018 Tj
+(2851 [SYS_chdir] sys_chdir,) 126.6869 Tj
0 -47.4668 Td
-(2852 {) 26.2111 Tj
+(2852 [SYS_close] sys_close,) 126.6869 Tj
0 -56.9602 Td
-(2853 int addr;) 69.8962 Tj
+(2853 [SYS_dup] sys_dup,) 117.9499 Tj
0 -66.4535 Td
-(2854 int n;) 56.7907 Tj
+(2854 [SYS_exec] sys_exec,) 122.3184 Tj
0 -75.9469 Td
-(2855 ) 21.8426 Tj
+(2855 [SYS_exit] sys_exit,) 122.3184 Tj
0 -85.4403 Td
-(2856 if\(argint\(0, &n\) < 0\)) 122.3184 Tj
+(2856 [SYS_fork] sys_fork,) 122.3184 Tj
0 -94.9336 Td
-(2857 return -1;) 83.0018 Tj
+(2857 [SYS_fstat] sys_fstat,) 126.6869 Tj
0 -104.427 Td
-(2858 if\(\(addr = growproc\(n\)\) < 0\)) 152.898 Tj
+(2858 [SYS_getpid] sys_getpid,) 131.0554 Tj
0 -113.9203 Td
-(2859 return -1;) 83.0018 Tj
+(2859 [SYS_kill] sys_kill,) 122.3184 Tj
0 -123.4137 Td
-(2860 return addr;) 83.0018 Tj
+(2860 [SYS_link] sys_link,) 122.3184 Tj
0 -132.9071 Td
-(2861 }) 26.2111 Tj
+(2861 [SYS_mkdir] sys_mkdir,) 126.6869 Tj
0 -142.4004 Td
-(2862 ) 21.8426 Tj
+(2862 [SYS_mknod] sys_mknod,) 126.6869 Tj
0 -151.8938 Td
-(2863 int) 34.9481 Tj
+(2863 [SYS_open] sys_open,) 122.3184 Tj
0 -161.3871 Td
-(2864 sys_sleep\(void\)) 87.3703 Tj
+(2864 [SYS_pipe] sys_pipe,) 122.3184 Tj
0 -170.8805 Td
-(2865 {) 26.2111 Tj
+(2865 [SYS_read] sys_read,) 122.3184 Tj
0 -180.3739 Td
-(2866 int n, ticks0;) 91.7388 Tj
+(2866 [SYS_sbrk] sys_sbrk,) 122.3184 Tj
0 -189.8672 Td
-(2867 ) 21.8426 Tj
+(2867 [SYS_sleep] sys_sleep,) 126.6869 Tj
0 -199.3606 Td
-(2868 if\(argint\(0, &n\) < 0\)) 122.3184 Tj
+(2868 [SYS_unlink] sys_unlink,) 131.0554 Tj
0 -208.8539 Td
-(2869 return -1;) 83.0018 Tj
+(2869 [SYS_wait] sys_wait,) 122.3184 Tj
0 -218.3473 Td
-(2870 acquire\(&tickslock\);) 117.9499 Tj
+(2870 [SYS_write] sys_write,) 126.6869 Tj
0 -227.8407 Td
-(2871 ticks0 = ticks;) 96.1073 Tj
+(2871 };) 30.5796 Tj
0 -237.334 Td
-(2872 while\(ticks - ticks0 < n\){) 144.161 Tj
+(2872 ) 21.8426 Tj
0 -246.8274 Td
-(2873 if\(cp->killed\){) 104.8443 Tj
+(2873 void) 39.3166 Tj
0 -256.3207 Td
-(2874 release\(&tickslock\);) 135.4239 Tj
+(2874 syscall\(void\)) 78.6333 Tj
0 -265.8141 Td
-(2875 return -1;) 91.7388 Tj
+(2875 {) 26.2111 Tj
0 -275.3075 Td
-(2876 }) 43.6851 Tj
+(2876 int num;) 65.5277 Tj
0 -284.8008 Td
-(2877 sleep\(&ticks, &tickslock\);) 152.898 Tj
+(2877 ) 21.8426 Tj
0 -294.2942 Td
-(2878 }) 34.9481 Tj
+(2878 num = cp->tf->eax;) 109.2129 Tj
0 -303.7875 Td
-(2879 release\(&tickslock\);) 117.9499 Tj
+(2879 if\(num >= 0 && num < NELEM\(syscalls\) && syscalls[num]\
+\)) 266.4794 Tj
0 -313.2809 Td
-(2880 return 0;) 69.8962 Tj
+(2880 cp->tf->eax = syscalls[num]\(\);) 170.3721 Tj
0 -322.7743 Td
-(2881 }) 26.2111 Tj
+(2881 else {) 56.7907 Tj
0 -332.2676 Td
-(2882 ) 21.8426 Tj
+(2882 cprintf\("%d %s: unknown sys call %d\\n",) 209.6887 Tj
0 -341.761 Td
-(2883 ) 21.8426 Tj
+(2883 cp->pid, cp->name, num\);) 179.1091 Tj
0 -351.2543 Td
-(2884 ) 21.8426 Tj
+(2884 cp->tf->eax = -1;) 113.5814 Tj
0 -360.7477 Td
-(2885 ) 21.8426 Tj
+(2885 }) 34.9481 Tj
0 -370.2411 Td
-(2886 ) 21.8426 Tj
+(2886 }) 26.2111 Tj
0 -379.7344 Td
(2887 ) 21.8426 Tj
0 -389.2278 Td
@@ -11531,6 +11622,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -11548,89 +11641,89 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/buf.h Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/sysproc.c Page 1) 174.7406 Tj
0 -28.4801 Td
-(2900 struct buf {) 74.2647 Tj
+(2900 #include "types.h") 100.4758 Tj
0 -37.9735 Td
-(2901 int flags;) 74.2647 Tj
+(2901 #include "x86.h") 91.7388 Tj
0 -47.4668 Td
-(2902 uint dev;) 69.8962 Tj
+(2902 #include "defs.h") 96.1073 Tj
0 -56.9602 Td
-(2903 uint sector;) 83.0018 Tj
+(2903 #include "param.h") 100.4758 Tj
0 -66.4535 Td
-(2904 struct buf *prev; // LRU cache list) 183.4776 Tj
+(2904 #include "mmu.h") 91.7388 Tj
0 -75.9469 Td
-(2905 struct buf *next;) 104.8443 Tj
+(2905 #include "proc.h") 96.1073 Tj
0 -85.4403 Td
-(2906 struct buf *qnext; // disk queue) 170.3721 Tj
+(2906 ) 21.8426 Tj
0 -94.9336 Td
-(2907 uchar data[512];) 100.4758 Tj
+(2907 int) 34.9481 Tj
0 -104.427 Td
-(2908 };) 30.5796 Tj
+(2908 sys_fork\(void\)) 83.0018 Tj
0 -113.9203 Td
-(2909 #define B_BUSY 0x1 // buffer is locked by some process) 266.4794 Tj
+(2909 {) 26.2111 Tj
0 -123.4137 Td
-(2910 #define B_VALID 0x2 // buffer has been read from disk) 257.7424 Tj
+(2910 return fork\(\);) 91.7388 Tj
0 -132.9071 Td
-(2911 #define B_DIRTY 0x4 // buffer needs to be written to disk) 275.2164 Tj
+(2911 }) 26.2111 Tj
0 -142.4004 Td
(2912 ) 21.8426 Tj
0 -151.8938 Td
-(2913 ) 21.8426 Tj
+(2913 int) 34.9481 Tj
0 -161.3871 Td
-(2914 ) 21.8426 Tj
+(2914 sys_exit\(void\)) 83.0018 Tj
0 -170.8805 Td
-(2915 ) 21.8426 Tj
+(2915 {) 26.2111 Tj
0 -180.3739 Td
-(2916 ) 21.8426 Tj
+(2916 exit\(\);) 61.1592 Tj
0 -189.8672 Td
-(2917 ) 21.8426 Tj
+(2917 return 0; // not reached) 139.7925 Tj
0 -199.3606 Td
-(2918 ) 21.8426 Tj
+(2918 }) 26.2111 Tj
0 -208.8539 Td
(2919 ) 21.8426 Tj
0 -218.3473 Td
-(2920 ) 21.8426 Tj
+(2920 int) 34.9481 Tj
0 -227.8407 Td
-(2921 ) 21.8426 Tj
+(2921 sys_wait\(void\)) 83.0018 Tj
0 -237.334 Td
-(2922 ) 21.8426 Tj
+(2922 {) 26.2111 Tj
0 -246.8274 Td
-(2923 ) 21.8426 Tj
+(2923 return wait\(\);) 91.7388 Tj
0 -256.3207 Td
-(2924 ) 21.8426 Tj
+(2924 }) 26.2111 Tj
0 -265.8141 Td
(2925 ) 21.8426 Tj
0 -275.3075 Td
-(2926 ) 21.8426 Tj
+(2926 int) 34.9481 Tj
0 -284.8008 Td
-(2927 ) 21.8426 Tj
+(2927 sys_kill\(void\)) 83.0018 Tj
0 -294.2942 Td
-(2928 ) 21.8426 Tj
+(2928 {) 26.2111 Tj
0 -303.7875 Td
-(2929 ) 21.8426 Tj
+(2929 int pid;) 65.5277 Tj
0 -313.2809 Td
(2930 ) 21.8426 Tj
0 -322.7743 Td
-(2931 ) 21.8426 Tj
+(2931 if\(argint\(0, &pid\) < 0\)) 131.0554 Tj
0 -332.2676 Td
-(2932 ) 21.8426 Tj
+(2932 return -1;) 83.0018 Tj
0 -341.761 Td
-(2933 ) 21.8426 Tj
+(2933 return kill\(pid\);) 104.8443 Tj
0 -351.2543 Td
-(2934 ) 21.8426 Tj
+(2934 }) 26.2111 Tj
0 -360.7477 Td
(2935 ) 21.8426 Tj
0 -370.2411 Td
-(2936 ) 21.8426 Tj
+(2936 int) 34.9481 Tj
0 -379.7344 Td
-(2937 ) 21.8426 Tj
+(2937 sys_getpid\(void\)) 91.7388 Tj
0 -389.2278 Td
-(2938 ) 21.8426 Tj
+(2938 {) 26.2111 Tj
0 -398.7211 Td
-(2939 ) 21.8426 Tj
+(2939 return cp->pid;) 96.1073 Tj
0 -408.2145 Td
-(2940 ) 21.8426 Tj
+(2940 }) 26.2111 Tj
0 -417.7079 Td
(2941 ) 21.8426 Tj
0 -427.2012 Td
@@ -11667,73 +11760,73 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/dev.h Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/sysproc.c Page 2) 174.7406 Tj
0 -28.4801 Td
-(2950 struct devsw {) 83.0018 Tj
+(2950 int) 34.9481 Tj
0 -37.9735 Td
-(2951 int \(*read\)\(struct inode*, char*, int\);) 200.9517 Tj
+(2951 sys_sbrk\(void\)) 83.0018 Tj
0 -47.4668 Td
-(2952 int \(*write\)\(struct inode*, char*, int\);) 205.3202 Tj
+(2952 {) 26.2111 Tj
0 -56.9602 Td
-(2953 };) 30.5796 Tj
+(2953 int addr;) 69.8962 Tj
0 -66.4535 Td
-(2954 ) 21.8426 Tj
+(2954 int n;) 56.7907 Tj
0 -75.9469 Td
-(2955 extern struct devsw devsw[];) 144.161 Tj
+(2955 ) 21.8426 Tj
0 -85.4403 Td
-(2956 ) 21.8426 Tj
+(2956 if\(argint\(0, &n\) < 0\)) 122.3184 Tj
0 -94.9336 Td
-(2957 #define CONSOLE 1) 96.1073 Tj
+(2957 return -1;) 83.0018 Tj
0 -104.427 Td
-(2958 ) 21.8426 Tj
+(2958 addr = cp->sz;) 91.7388 Tj
0 -113.9203 Td
-(2959 ) 21.8426 Tj
+(2959 if\(growproc\(n\) < 0\)) 113.5814 Tj
0 -123.4137 Td
-(2960 ) 21.8426 Tj
+(2960 return -1;) 83.0018 Tj
0 -132.9071 Td
-(2961 ) 21.8426 Tj
+(2961 return addr;) 83.0018 Tj
0 -142.4004 Td
-(2962 ) 21.8426 Tj
+(2962 }) 26.2111 Tj
0 -151.8938 Td
(2963 ) 21.8426 Tj
0 -161.3871 Td
-(2964 ) 21.8426 Tj
+(2964 int) 34.9481 Tj
0 -170.8805 Td
-(2965 ) 21.8426 Tj
+(2965 sys_sleep\(void\)) 87.3703 Tj
0 -180.3739 Td
-(2966 ) 21.8426 Tj
+(2966 {) 26.2111 Tj
0 -189.8672 Td
-(2967 ) 21.8426 Tj
+(2967 int n, ticks0;) 91.7388 Tj
0 -199.3606 Td
(2968 ) 21.8426 Tj
0 -208.8539 Td
-(2969 ) 21.8426 Tj
+(2969 if\(argint\(0, &n\) < 0\)) 122.3184 Tj
0 -218.3473 Td
-(2970 ) 21.8426 Tj
+(2970 return -1;) 83.0018 Tj
0 -227.8407 Td
-(2971 ) 21.8426 Tj
+(2971 acquire\(&tickslock\);) 117.9499 Tj
0 -237.334 Td
-(2972 ) 21.8426 Tj
+(2972 ticks0 = ticks;) 96.1073 Tj
0 -246.8274 Td
-(2973 ) 21.8426 Tj
+(2973 while\(ticks - ticks0 < n\){) 144.161 Tj
0 -256.3207 Td
-(2974 ) 21.8426 Tj
+(2974 if\(cp->killed\){) 104.8443 Tj
0 -265.8141 Td
-(2975 ) 21.8426 Tj
+(2975 release\(&tickslock\);) 135.4239 Tj
0 -275.3075 Td
-(2976 ) 21.8426 Tj
+(2976 return -1;) 91.7388 Tj
0 -284.8008 Td
-(2977 ) 21.8426 Tj
+(2977 }) 43.6851 Tj
0 -294.2942 Td
-(2978 ) 21.8426 Tj
+(2978 sleep\(&ticks, &tickslock\);) 152.898 Tj
0 -303.7875 Td
-(2979 ) 21.8426 Tj
+(2979 }) 34.9481 Tj
0 -313.2809 Td
-(2980 ) 21.8426 Tj
+(2980 release\(&tickslock\);) 117.9499 Tj
0 -322.7743 Td
-(2981 ) 21.8426 Tj
+(2981 return 0;) 69.8962 Tj
0 -332.2676 Td
-(2982 ) 21.8426 Tj
+(2982 }) 26.2111 Tj
0 -341.761 Td
(2983 ) 21.8426 Tj
0 -351.2543 Td
@@ -11798,6 +11891,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -11815,31 +11910,31 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fcntl.h Page 1) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/buf.h Page 1) 157.2665 Tj
0 -28.4801 Td
-(3000 #define O_RDONLY 0x000) 122.3184 Tj
+(3000 struct buf {) 74.2647 Tj
0 -37.9735 Td
-(3001 #define O_WRONLY 0x001) 122.3184 Tj
+(3001 int flags;) 74.2647 Tj
0 -47.4668 Td
-(3002 #define O_RDWR 0x002) 122.3184 Tj
+(3002 uint dev;) 69.8962 Tj
0 -56.9602 Td
-(3003 #define O_CREATE 0x200) 122.3184 Tj
+(3003 uint sector;) 83.0018 Tj
0 -66.4535 Td
-(3004 ) 21.8426 Tj
+(3004 struct buf *prev; // LRU cache list) 183.4776 Tj
0 -75.9469 Td
-(3005 ) 21.8426 Tj
+(3005 struct buf *next;) 104.8443 Tj
0 -85.4403 Td
-(3006 ) 21.8426 Tj
+(3006 struct buf *qnext; // disk queue) 170.3721 Tj
0 -94.9336 Td
-(3007 ) 21.8426 Tj
+(3007 uchar data[512];) 100.4758 Tj
0 -104.427 Td
-(3008 ) 21.8426 Tj
+(3008 };) 30.5796 Tj
0 -113.9203 Td
-(3009 ) 21.8426 Tj
+(3009 #define B_BUSY 0x1 // buffer is locked by some process) 266.4794 Tj
0 -123.4137 Td
-(3010 ) 21.8426 Tj
+(3010 #define B_VALID 0x2 // buffer has been read from disk) 257.7424 Tj
0 -132.9071 Td
-(3011 ) 21.8426 Tj
+(3011 #define B_DIRTY 0x4 // buffer needs to be written to disk) 275.2164 Tj
0 -142.4004 Td
(3012 ) 21.8426 Tj
0 -151.8938 Td
@@ -11934,21 +12029,21 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/stat.h Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/fcntl.h Page 1) 166.0035 Tj
0 -28.4801 Td
-(3050 struct stat {) 78.6333 Tj
+(3050 #define O_RDONLY 0x000) 122.3184 Tj
0 -37.9735 Td
-(3051 int dev; // Device number) 157.2665 Tj
+(3051 #define O_WRONLY 0x001) 122.3184 Tj
0 -47.4668 Td
-(3052 uint ino; // Inode number on device) 196.5831 Tj
+(3052 #define O_RDWR 0x002) 122.3184 Tj
0 -56.9602 Td
-(3053 short type; // Type of file) 152.898 Tj
+(3053 #define O_CREATE 0x200) 122.3184 Tj
0 -66.4535 Td
-(3054 short nlink; // Number of links to file) 200.9517 Tj
+(3054 ) 21.8426 Tj
0 -75.9469 Td
-(3055 uint size; // Size of file in bytes) 192.2146 Tj
+(3055 ) 21.8426 Tj
0 -85.4403 Td
-(3056 };) 30.5796 Tj
+(3056 ) 21.8426 Tj
0 -94.9336 Td
(3057 ) 21.8426 Tj
0 -104.427 Td
@@ -12065,6 +12160,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -12082,29 +12179,29 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/file.h Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/stat.h Page 1) 161.635 Tj
0 -28.4801 Td
-(3100 struct file {) 78.6333 Tj
+(3100 #define T_DIR 1 // Directory) 157.2665 Tj
0 -37.9735 Td
-(3101 enum { FD_CLOSED, FD_NONE, FD_PIPE, FD_INODE } type;) 257.7424 Tj
+(3101 #define T_FILE 2 // File) 135.4239 Tj
0 -47.4668 Td
-(3102 int ref; // reference count) 148.5295 Tj
+(3102 #define T_DEV 3 // Special device) 179.1091 Tj
0 -56.9602 Td
-(3103 char readable;) 91.7388 Tj
+(3103 ) 21.8426 Tj
0 -66.4535 Td
-(3104 char writable;) 91.7388 Tj
+(3104 struct stat {) 78.6333 Tj
0 -75.9469 Td
-(3105 struct pipe *pipe;) 109.2129 Tj
+(3105 short type; // Type of file) 152.898 Tj
0 -85.4403 Td
-(3106 struct inode *ip;) 104.8443 Tj
+(3106 int dev; // Device number) 157.2665 Tj
0 -94.9336 Td
-(3107 uint off;) 69.8962 Tj
+(3107 uint ino; // Inode number on device) 196.5831 Tj
0 -104.427 Td
-(3108 };) 30.5796 Tj
+(3108 short nlink; // Number of links to file) 200.9517 Tj
0 -113.9203 Td
-(3109 ) 21.8426 Tj
+(3109 uint size; // Size of file in bytes) 192.2146 Tj
0 -123.4137 Td
-(3110 ) 21.8426 Tj
+(3110 };) 30.5796 Tj
0 -132.9071 Td
(3111 ) 21.8426 Tj
0 -142.4004 Td
@@ -12201,7 +12298,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.h Page 1) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.h Page 1) 152.898 Tj
0 -28.4801 Td
(3150 // On-disk file system format.) 152.898 Tj
0 -37.9735 Td
@@ -12217,90 +12314,90 @@ q
0 -85.4403 Td
(3156 ) 21.8426 Tj
0 -94.9336 Td
-(3157 #define BSIZE 512 // block size) 161.635 Tj
+(3157 #define ROOTINO 1 // root i-number) 174.7406 Tj
0 -104.427 Td
-(3158 ) 21.8426 Tj
+(3158 #define BSIZE 512 // block size) 161.635 Tj
0 -113.9203 Td
-(3159 // File system super block) 135.4239 Tj
+(3159 ) 21.8426 Tj
0 -123.4137 Td
-(3160 struct superblock {) 104.8443 Tj
+(3160 // File system super block) 135.4239 Tj
0 -132.9071 Td
-(3161 uint size; // Size of file system image \(blocks\
-\)) 275.2164 Tj
+(3161 struct superblock {) 104.8443 Tj
0 -142.4004 Td
-(3162 uint nblocks; // Number of data blocks) 218.4257 Tj
+(3162 uint size; // Size of file system image \(blocks\
+\)) 275.2164 Tj
0 -151.8938 Td
-(3163 uint ninodes; // Number of inodes.) 200.9517 Tj
+(3163 uint nblocks; // Number of data blocks) 218.4257 Tj
0 -161.3871 Td
-(3164 };) 30.5796 Tj
+(3164 uint ninodes; // Number of inodes.) 200.9517 Tj
0 -170.8805 Td
-(3165 ) 21.8426 Tj
+(3165 };) 30.5796 Tj
0 -180.3739 Td
-(3166 #define NADDRS \(NDIRECT+1\)) 135.4239 Tj
+(3166 ) 21.8426 Tj
0 -189.8672 Td
(3167 #define NDIRECT 12) 100.4758 Tj
0 -199.3606 Td
-(3168 #define INDIRECT 12) 104.8443 Tj
+(3168 #define NINDIRECT \(BSIZE / sizeof\(uint\)\)) 196.5831 Tj
0 -208.8539 Td
-(3169 #define NINDIRECT \(BSIZE / sizeof\(uint\)\)) 196.5831 Tj
+(3169 #define MAXFILE \(NDIRECT + NINDIRECT\)) 183.4776 Tj
0 -218.3473 Td
-(3170 #define MAXFILE \(NDIRECT + NINDIRECT\)) 187.8461 Tj
+(3170 ) 21.8426 Tj
0 -227.8407 Td
-(3171 ) 21.8426 Tj
+(3171 // On-disk inode structure) 135.4239 Tj
0 -237.334 Td
-(3172 // On-disk inode structure) 135.4239 Tj
+(3172 struct dinode {) 87.3703 Tj
0 -246.8274 Td
-(3173 struct dinode {) 87.3703 Tj
+(3173 short type; // File type) 179.1091 Tj
0 -256.3207 Td
-(3174 short type; // File type) 179.1091 Tj
+(3174 short major; // Major device number \(T_DEV onl\
+y\)) 279.5849 Tj
0 -265.8141 Td
-(3175 short major; // Major device number \(T_DEV onl\
+(3175 short minor; // Minor device number \(T_DEV onl\
y\)) 279.5849 Tj
0 -275.3075 Td
-(3176 short minor; // Minor device number \(T_DEV onl\
-y\)) 279.5849 Tj
-0 -284.8008 Td
-(3177 short nlink; // Number of links to inode in fil\
+(3176 short nlink; // Number of links to inode in fil\
e system) 310.1645 Tj
+0 -284.8008 Td
+(3177 uint size; // Size of file \(bytes\)) 227.1628 Tj
0 -294.2942 Td
-(3178 uint size; // Size of file \(bytes\)) 227.1628 Tj
+(3178 uint addrs[NDIRECT+1]; // Data block addresses) 240.2683 Tj
0 -303.7875 Td
-(3179 uint addrs[NADDRS]; // Data block addresses) 227.1628 Tj
+(3179 };) 30.5796 Tj
0 -313.2809 Td
-(3180 };) 30.5796 Tj
+(3180 ) 21.8426 Tj
0 -322.7743 Td
-(3181 ) 21.8426 Tj
+(3181 // Inodes per block.) 109.2129 Tj
0 -332.2676 Td
-(3182 #define T_DIR 1 // Directory) 157.2665 Tj
+(3182 #define IPB \(BSIZE / sizeof\(struct dinode\)\)) 253.3738 Tj
0 -341.761 Td
-(3183 #define T_FILE 2 // File) 135.4239 Tj
+(3183 ) 21.8426 Tj
0 -351.2543 Td
-(3184 #define T_DEV 3 // Special device) 179.1091 Tj
+(3184 // Block containing inode i) 139.7925 Tj
0 -360.7477 Td
-(3185 ) 21.8426 Tj
+(3185 #define IBLOCK\(i\) \(\(i\) / IPB + 2\)) 183.4776 Tj
0 -370.2411 Td
-(3186 // Inodes per block.) 109.2129 Tj
+(3186 ) 21.8426 Tj
0 -379.7344 Td
-(3187 #define IPB \(BSIZE / sizeof\(struct dinode\)\)) 253.3738 Tj
+(3187 // Bitmap bits per block) 126.6869 Tj
0 -389.2278 Td
-(3188 ) 21.8426 Tj
+(3188 #define BPB \(BSIZE*8\)) 157.2665 Tj
0 -398.7211 Td
-(3189 // Block containing inode i) 139.7925 Tj
+(3189 ) 21.8426 Tj
0 -408.2145 Td
-(3190 #define IBLOCK\(i\) \(\(i\) / IPB + 2\)) 183.4776 Tj
+(3190 // Block containing bit for block b) 174.7406 Tj
0 -417.7079 Td
-(3191 ) 21.8426 Tj
+(3191 #define BBLOCK\(b, ninodes\) \(b/BPB + \(ninodes\)/IPB + 3\
+\)) 257.7424 Tj
0 -427.2012 Td
-(3192 // Bitmap bits per block) 126.6869 Tj
+(3192 ) 21.8426 Tj
0 -436.6946 Td
-(3193 #define BPB \(BSIZE*8\)) 157.2665 Tj
+(3193 ) 21.8426 Tj
0 -446.1879 Td
(3194 ) 21.8426 Tj
0 -455.6813 Td
-(3195 // Block containing bit for block b) 174.7406 Tj
+(3195 ) 21.8426 Tj
0 -465.1747 Td
-(3196 #define BBLOCK\(b, ninodes\) \(b/BPB + \(ninodes\)/IPB + 3\
-\)) 257.7424 Tj
+(3196 ) 21.8426 Tj
0 -474.668 Td
(3197 ) 21.8426 Tj
0 -484.1614 Td
@@ -12337,6 +12434,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -12354,7 +12453,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.h Page 2) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.h Page 2) 152.898 Tj
0 -28.4801 Td
(3200 // Directory is a file containing a sequence of dirent str\
uctures.) 310.1645 Tj
@@ -12474,89 +12573,89 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fsvar.h Page 1) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/file.h Page 1) 161.635 Tj
0 -28.4801 Td
-(3250 // in-core file system types) 144.161 Tj
+(3250 struct file {) 78.6333 Tj
0 -37.9735 Td
-(3251 ) 21.8426 Tj
+(3251 enum { FD_NONE, FD_PIPE, FD_INODE } type;) 209.6887 Tj
0 -47.4668 Td
-(3252 struct inode {) 83.0018 Tj
+(3252 int ref; // reference count) 148.5295 Tj
0 -56.9602 Td
-(3253 uint dev; // Device number) 187.8461 Tj
+(3253 char readable;) 91.7388 Tj
0 -66.4535 Td
-(3254 uint inum; // Inode number) 183.4776 Tj
+(3254 char writable;) 91.7388 Tj
0 -75.9469 Td
-(3255 int ref; // Reference count) 196.5831 Tj
+(3255 struct pipe *pipe;) 109.2129 Tj
0 -85.4403 Td
-(3256 int flags; // I_BUSY, I_VALID) 196.5831 Tj
+(3256 struct inode *ip;) 104.8443 Tj
0 -94.9336 Td
-(3257 ) 21.8426 Tj
+(3257 uint off;) 69.8962 Tj
0 -104.427 Td
-(3258 short type; // copy of disk inode) 209.6887 Tj
+(3258 };) 30.5796 Tj
0 -113.9203 Td
-(3259 short major;) 83.0018 Tj
+(3259 ) 21.8426 Tj
0 -123.4137 Td
-(3260 short minor;) 83.0018 Tj
+(3260 ) 21.8426 Tj
0 -132.9071 Td
-(3261 short nlink;) 83.0018 Tj
+(3261 // in-core file system types) 144.161 Tj
0 -142.4004 Td
-(3262 uint size;) 74.2647 Tj
+(3262 ) 21.8426 Tj
0 -151.8938 Td
-(3263 uint addrs[NADDRS];) 113.5814 Tj
+(3263 struct inode {) 83.0018 Tj
0 -161.3871 Td
-(3264 };) 30.5796 Tj
+(3264 uint dev; // Device number) 187.8461 Tj
0 -170.8805 Td
-(3265 ) 21.8426 Tj
+(3265 uint inum; // Inode number) 183.4776 Tj
0 -180.3739 Td
-(3266 #define I_BUSY 0x1) 100.4758 Tj
+(3266 int ref; // Reference count) 196.5831 Tj
0 -189.8672 Td
-(3267 #define I_VALID 0x2) 104.8443 Tj
+(3267 int flags; // I_BUSY, I_VALID) 196.5831 Tj
0 -199.3606 Td
(3268 ) 21.8426 Tj
0 -208.8539 Td
-(3269 ) 21.8426 Tj
+(3269 short type; // copy of disk inode) 209.6887 Tj
0 -218.3473 Td
-(3270 ) 21.8426 Tj
+(3270 short major;) 83.0018 Tj
0 -227.8407 Td
-(3271 ) 21.8426 Tj
+(3271 short minor;) 83.0018 Tj
0 -237.334 Td
-(3272 ) 21.8426 Tj
+(3272 short nlink;) 83.0018 Tj
0 -246.8274 Td
-(3273 ) 21.8426 Tj
+(3273 uint size;) 74.2647 Tj
0 -256.3207 Td
-(3274 ) 21.8426 Tj
+(3274 uint addrs[NDIRECT+1];) 126.6869 Tj
0 -265.8141 Td
-(3275 ) 21.8426 Tj
+(3275 };) 30.5796 Tj
0 -275.3075 Td
(3276 ) 21.8426 Tj
0 -284.8008 Td
-(3277 ) 21.8426 Tj
+(3277 #define I_BUSY 0x1) 100.4758 Tj
0 -294.2942 Td
-(3278 ) 21.8426 Tj
+(3278 #define I_VALID 0x2) 104.8443 Tj
0 -303.7875 Td
(3279 ) 21.8426 Tj
0 -313.2809 Td
(3280 ) 21.8426 Tj
0 -322.7743 Td
-(3281 ) 21.8426 Tj
+(3281 // device implementations) 131.0554 Tj
0 -332.2676 Td
(3282 ) 21.8426 Tj
0 -341.761 Td
-(3283 ) 21.8426 Tj
+(3283 struct devsw {) 83.0018 Tj
0 -351.2543 Td
-(3284 ) 21.8426 Tj
+(3284 int \(*read\)\(struct inode*, char*, int\);) 200.9517 Tj
0 -360.7477 Td
-(3285 ) 21.8426 Tj
+(3285 int \(*write\)\(struct inode*, char*, int\);) 205.3202 Tj
0 -370.2411 Td
-(3286 ) 21.8426 Tj
+(3286 };) 30.5796 Tj
0 -379.7344 Td
(3287 ) 21.8426 Tj
0 -389.2278 Td
-(3288 ) 21.8426 Tj
+(3288 extern struct devsw devsw[];) 144.161 Tj
0 -398.7211 Td
(3289 ) 21.8426 Tj
0 -408.2145 Td
-(3290 ) 21.8426 Tj
+(3290 #define CONSOLE 1) 96.1073 Tj
0 -417.7079 Td
(3291 ) 21.8426 Tj
0 -427.2012 Td
@@ -12605,6 +12704,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -12622,7 +12723,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/ide.c Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/ide.c Page 1) 157.2665 Tj
0 -28.4801 Td
(3300 // Simple PIO-based \(non-DMA\) IDE driver code.) 222.7942 Tj
0 -37.9735 Td
@@ -12664,25 +12765,24 @@ q
0 -208.8539 Td
(3319 ) 21.8426 Tj
0 -218.3473 Td
-(3320 // ide_queue points to the buf now being read/written to t\
-he disk.) 310.1645 Tj
+(3320 // idequeue points to the buf now being read/written to th\
+e disk.) 305.796 Tj
0 -227.8407 Td
-(3321 // ide_queue->qnext points to the next buf to be processed\
-.) 279.5849 Tj
+(3321 // idequeue->qnext points to the next buf to be processed.) 275.2164 Tj
0 -237.334 Td
-(3322 // You must hold ide_lock while manipulating queue.) 244.6368 Tj
+(3322 // You must hold idelock while manipulating queue.) 240.2683 Tj
0 -246.8274 Td
(3323 ) 21.8426 Tj
0 -256.3207 Td
-(3324 static struct spinlock ide_lock;) 161.635 Tj
+(3324 static struct spinlock idelock;) 157.2665 Tj
0 -265.8141 Td
-(3325 static struct buf *ide_queue;) 148.5295 Tj
+(3325 static struct buf *idequeue;) 144.161 Tj
0 -275.3075 Td
(3326 ) 21.8426 Tj
0 -284.8008 Td
-(3327 static int disk_1_present;) 135.4239 Tj
+(3327 static int havedisk1;) 113.5814 Tj
0 -294.2942 Td
-(3328 static void ide_start_request\(\);) 161.635 Tj
+(3328 static void idestart\(struct buf*\);) 170.3721 Tj
0 -303.7875 Td
(3329 ) 21.8426 Tj
0 -313.2809 Td
@@ -12690,7 +12790,7 @@ he disk.) 310.1645 Tj
0 -322.7743 Td
(3331 static int) 65.5277 Tj
0 -332.2676 Td
-(3332 ide_wait_ready\(int check_error\)) 157.2665 Tj
+(3332 idewait\(int checkerr\)) 113.5814 Tj
0 -341.761 Td
(3333 {) 26.2111 Tj
0 -351.2543 Td
@@ -12698,12 +12798,12 @@ he disk.) 310.1645 Tj
0 -360.7477 Td
(3335 ) 21.8426 Tj
0 -370.2411 Td
-(3336 while\(\(\(r = inb\(0x1f7\)\) & IDE_BSY\) || !\(r & IDE_\
-DRDY\)\)) 266.4794 Tj
+(3336 while\(\(\(r = inb\(0x1f7\)\) & \(IDE_BSY|IDE_DRDY\)\) !\
+= IDE_DRDY\)) 283.9534 Tj
0 -379.7344 Td
(3337 ;) 43.6851 Tj
0 -389.2278 Td
-(3338 if\(check_error && \(r & \(IDE_DF|IDE_ERR\)\) != 0\)) 231.5313 Tj
+(3338 if\(checkerr && \(r & \(IDE_DF|IDE_ERR\)\) != 0\)) 218.4257 Tj
0 -398.7211 Td
(3339 return -1;) 83.0018 Tj
0 -408.2145 Td
@@ -12744,11 +12844,11 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/ide.c Page 2) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/ide.c Page 2) 157.2665 Tj
0 -28.4801 Td
(3350 void) 39.3166 Tj
0 -37.9735 Td
-(3351 ide_init\(void\)) 83.0018 Tj
+(3351 ideinit\(void\)) 78.6333 Tj
0 -47.4668 Td
(3352 {) 26.2111 Tj
0 -56.9602 Td
@@ -12756,13 +12856,13 @@ q
0 -66.4535 Td
(3354 ) 21.8426 Tj
0 -75.9469 Td
-(3355 initlock\(&ide_lock, "ide"\);) 148.5295 Tj
+(3355 initlock\(&idelock, "ide"\);) 144.161 Tj
0 -85.4403 Td
-(3356 pic_enable\(IRQ_IDE\);) 117.9499 Tj
+(3356 picenable\(IRQ_IDE\);) 113.5814 Tj
0 -94.9336 Td
-(3357 ioapic_enable\(IRQ_IDE, ncpu - 1\);) 174.7406 Tj
+(3357 ioapicenable\(IRQ_IDE, ncpu - 1\);) 170.3721 Tj
0 -104.427 Td
-(3358 ide_wait_ready\(0\);) 109.2129 Tj
+(3358 idewait\(0\);) 78.6333 Tj
0 -113.9203 Td
(3359 ) 21.8426 Tj
0 -123.4137 Td
@@ -12774,7 +12874,7 @@ q
0 -151.8938 Td
(3363 if\(inb\(0x1f7\) != 0\){) 126.6869 Tj
0 -161.3871 Td
-(3364 disk_1_present = 1;) 131.0554 Tj
+(3364 havedisk1 = 1;) 109.2129 Tj
0 -170.8805 Td
(3365 break;) 74.2647 Tj
0 -180.3739 Td
@@ -12792,21 +12892,21 @@ q
0 -237.334 Td
(3372 ) 21.8426 Tj
0 -246.8274 Td
-(3373 // Start the request for b. Caller must hold ide_lock.) 262.1109 Tj
+(3373 // Start the request for b. Caller must hold idelock.) 257.7424 Tj
0 -256.3207 Td
(3374 static void) 69.8962 Tj
0 -265.8141 Td
-(3375 ide_start_request\(struct buf *b\)) 161.635 Tj
+(3375 idestart\(struct buf *b\)) 122.3184 Tj
0 -275.3075 Td
(3376 {) 26.2111 Tj
0 -284.8008 Td
(3377 if\(b == 0\)) 74.2647 Tj
0 -294.2942 Td
-(3378 panic\("ide_start_request"\);) 157.2665 Tj
+(3378 panic\("idestart"\);) 117.9499 Tj
0 -303.7875 Td
(3379 ) 21.8426 Tj
0 -313.2809 Td
-(3380 ide_wait_ready\(0\);) 109.2129 Tj
+(3380 idewait\(0\);) 78.6333 Tj
0 -322.7743 Td
(3381 outb\(0x3f6, 0\); // generate interrupt) 196.5831 Tj
0 -332.2676 Td
@@ -12876,6 +12976,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -12893,13 +12995,13 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/ide.c Page 3) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/ide.c Page 3) 157.2665 Tj
0 -28.4801 Td
(3400 // Interrupt handler.) 113.5814 Tj
0 -37.9735 Td
(3401 void) 39.3166 Tj
0 -47.4668 Td
-(3402 ide_intr\(void\)) 83.0018 Tj
+(3402 ideintr\(void\)) 78.6333 Tj
0 -56.9602 Td
(3403 {) 26.2111 Tj
0 -66.4535 Td
@@ -12907,53 +13009,53 @@ q
0 -75.9469 Td
(3405 ) 21.8426 Tj
0 -85.4403 Td
-(3406 acquire\(&ide_lock\);) 113.5814 Tj
+(3406 // Take first buffer off queue.) 166.0035 Tj
0 -94.9336 Td
-(3407 if\(\(b = ide_queue\) == 0\){) 139.7925 Tj
+(3407 acquire\(&idelock\);) 109.2129 Tj
0 -104.427 Td
-(3408 release\(&ide_lock\);) 122.3184 Tj
+(3408 if\(\(b = idequeue\) == 0\){) 135.4239 Tj
0 -113.9203 Td
-(3409 return;) 69.8962 Tj
+(3409 release\(&idelock\);) 117.9499 Tj
0 -123.4137 Td
-(3410 }) 34.9481 Tj
+(3410 cprintf\("Spurious IDE interrupt.\\n"\);) 200.9517 Tj
0 -132.9071 Td
-(3411 ) 21.8426 Tj
+(3411 return;) 69.8962 Tj
0 -142.4004 Td
-(3412 // Read data if needed.) 131.0554 Tj
+(3412 }) 34.9481 Tj
0 -151.8938 Td
-(3413 if\(!\(b->flags & B_DIRTY\) && ide_wait_ready\(1\) >= 0\)) 253.3738 Tj
+(3413 idequeue = b->qnext;) 117.9499 Tj
0 -161.3871 Td
-(3414 insl\(0x1f0, b->data, 512/4\);) 161.635 Tj
+(3414 ) 21.8426 Tj
0 -170.8805 Td
-(3415 ) 21.8426 Tj
+(3415 // Read data if needed.) 131.0554 Tj
0 -180.3739 Td
-(3416 // Wake process waiting for this buf.) 192.2146 Tj
+(3416 if\(!\(b->flags & B_DIRTY\) && idewait\(1\) >= 0\)) 222.7942 Tj
0 -189.8672 Td
-(3417 b->flags |= B_VALID;) 117.9499 Tj
+(3417 insl\(0x1f0, b->data, 512/4\);) 161.635 Tj
0 -199.3606 Td
-(3418 b->flags &= ~B_DIRTY;) 122.3184 Tj
+(3418 ) 21.8426 Tj
0 -208.8539 Td
-(3419 wakeup\(b\);) 74.2647 Tj
+(3419 // Wake process waiting for this buf.) 192.2146 Tj
0 -218.3473 Td
-(3420 ) 21.8426 Tj
+(3420 b->flags |= B_VALID;) 117.9499 Tj
0 -227.8407 Td
-(3421 // Start disk on next buf in queue.) 183.4776 Tj
+(3421 b->flags &= ~B_DIRTY;) 122.3184 Tj
0 -237.334 Td
-(3422 if\(\(ide_queue = b->qnext\) != 0\)) 166.0035 Tj
+(3422 wakeup\(b\);) 74.2647 Tj
0 -246.8274 Td
-(3423 ide_start_request\(ide_queue\);) 166.0035 Tj
+(3423 ) 21.8426 Tj
0 -256.3207 Td
-(3424 ) 21.8426 Tj
+(3424 // Start disk on next buf in queue.) 183.4776 Tj
0 -265.8141 Td
-(3425 release\(&ide_lock\);) 113.5814 Tj
+(3425 if\(idequeue != 0\)) 104.8443 Tj
0 -275.3075 Td
-(3426 }) 26.2111 Tj
+(3426 idestart\(idequeue\);) 122.3184 Tj
0 -284.8008 Td
(3427 ) 21.8426 Tj
0 -294.2942 Td
-(3428 ) 21.8426 Tj
+(3428 release\(&idelock\);) 109.2129 Tj
0 -303.7875 Td
-(3429 ) 21.8426 Tj
+(3429 }) 26.2111 Tj
0 -313.2809 Td
(3430 ) 21.8426 Tj
0 -322.7743 Td
@@ -13012,7 +13114,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/ide.c Page 4) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/ide.c Page 4) 157.2665 Tj
0 -28.4801 Td
(3450 // Sync buf with disk.) 117.9499 Tj
0 -37.9735 Td
@@ -13024,7 +13126,7 @@ ALID.) 297.059 Tj
0 -56.9602 Td
(3453 void) 39.3166 Tj
0 -66.4535 Td
-(3454 ide_rw\(struct buf *b\)) 113.5814 Tj
+(3454 iderw\(struct buf *b\)) 109.2129 Tj
0 -75.9469 Td
(3455 {) 26.2111 Tj
0 -85.4403 Td
@@ -13034,27 +13136,27 @@ ALID.) 297.059 Tj
0 -104.427 Td
(3458 if\(!\(b->flags & B_BUSY\)\)) 135.4239 Tj
0 -113.9203 Td
-(3459 panic\("ide_rw: buf not busy"\);) 170.3721 Tj
+(3459 panic\("iderw: buf not busy"\);) 166.0035 Tj
0 -123.4137 Td
(3460 if\(\(b->flags & \(B_VALID|B_DIRTY\)\) == B_VALID\)) 227.1628 Tj
0 -132.9071 Td
-(3461 panic\("ide_rw: nothing to do"\);) 174.7406 Tj
+(3461 panic\("iderw: nothing to do"\);) 170.3721 Tj
0 -142.4004 Td
-(3462 if\(b->dev != 0 && !disk_1_present\)) 179.1091 Tj
+(3462 if\(b->dev != 0 && !havedisk1\)) 157.2665 Tj
0 -151.8938 Td
-(3463 panic\("ide disk 1 not present"\);) 179.1091 Tj
+(3463 panic\("idrw: ide disk 1 not present"\);) 205.3202 Tj
0 -161.3871 Td
(3464 ) 21.8426 Tj
0 -170.8805 Td
-(3465 acquire\(&ide_lock\);) 113.5814 Tj
+(3465 acquire\(&idelock\);) 109.2129 Tj
0 -180.3739 Td
(3466 ) 21.8426 Tj
0 -189.8672 Td
-(3467 // Append b to ide_queue.) 139.7925 Tj
+(3467 // Append b to idequeue.) 135.4239 Tj
0 -199.3606 Td
(3468 b->qnext = 0;) 87.3703 Tj
0 -208.8539 Td
-(3469 for\(pp=&ide_queue; *pp; pp=&\(*pp\)->qnext\)) 209.6887 Tj
+(3469 for\(pp=&idequeue; *pp; pp=&\(*pp\)->qnext\)) 205.3202 Tj
0 -218.3473 Td
(3470 ;) 43.6851 Tj
0 -227.8407 Td
@@ -13064,9 +13166,9 @@ ALID.) 297.059 Tj
0 -246.8274 Td
(3473 // Start disk if necessary.) 148.5295 Tj
0 -256.3207 Td
-(3474 if\(ide_queue == b\)) 109.2129 Tj
+(3474 if\(idequeue == b\)) 104.8443 Tj
0 -265.8141 Td
-(3475 ide_start_request\(b\);) 131.0554 Tj
+(3475 idestart\(b\);) 91.7388 Tj
0 -275.3075 Td
(3476 ) 21.8426 Tj
0 -284.8008 Td
@@ -13076,11 +13178,11 @@ ALID.) 297.059 Tj
0 -303.7875 Td
(3479 while\(\(b->flags & \(B_VALID|B_DIRTY\)\) != B_VALID\)) 240.2683 Tj
0 -313.2809 Td
-(3480 sleep\(b, &ide_lock\);) 126.6869 Tj
+(3480 sleep\(b, &idelock\);) 122.3184 Tj
0 -322.7743 Td
(3481 ) 21.8426 Tj
0 -332.2676 Td
-(3482 release\(&ide_lock\);) 113.5814 Tj
+(3482 release\(&idelock\);) 109.2129 Tj
0 -341.761 Td
(3483 }) 26.2111 Tj
0 -351.2543 Td
@@ -13145,6 +13247,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -13162,7 +13266,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/bio.c Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/bio.c Page 1) 157.2665 Tj
0 -28.4801 Td
(3500 // Buffer cache.) 91.7388 Tj
0 -37.9735 Td
@@ -13228,35 +13332,35 @@ o disk.) 305.796 Tj
0 -294.2942 Td
(3528 ) 21.8426 Tj
0 -303.7875 Td
-(3529 struct buf buf[NBUF];) 113.5814 Tj
+(3529 struct {) 56.7907 Tj
0 -313.2809 Td
-(3530 struct spinlock buf_table_lock;) 157.2665 Tj
+(3530 struct spinlock lock;) 122.3184 Tj
0 -322.7743 Td
-(3531 ) 21.8426 Tj
+(3531 struct buf buf[NBUF];) 122.3184 Tj
0 -332.2676 Td
-(3532 // Linked list of all buffers, through prev/next.) 235.8998 Tj
+(3532 ) 21.8426 Tj
0 -341.761 Td
-(3533 // bufhead->next is most recently used.) 192.2146 Tj
+(3533 // Linked list of all buffers, through prev/next.) 244.6368 Tj
0 -351.2543 Td
-(3534 // bufhead->tail is least recently used.) 196.5831 Tj
+(3534 // head.next is most recently used.) 183.4776 Tj
0 -360.7477 Td
-(3535 struct buf bufhead;) 104.8443 Tj
+(3535 struct buf head;) 100.4758 Tj
0 -370.2411 Td
-(3536 ) 21.8426 Tj
+(3536 } bcache;) 61.1592 Tj
0 -379.7344 Td
-(3537 void) 39.3166 Tj
+(3537 ) 21.8426 Tj
0 -389.2278 Td
-(3538 binit\(void\)) 69.8962 Tj
+(3538 void) 39.3166 Tj
0 -398.7211 Td
-(3539 {) 26.2111 Tj
+(3539 binit\(void\)) 69.8962 Tj
0 -408.2145 Td
-(3540 struct buf *b;) 91.7388 Tj
+(3540 {) 26.2111 Tj
0 -417.7079 Td
-(3541 ) 21.8426 Tj
+(3541 struct buf *b;) 91.7388 Tj
0 -427.2012 Td
-(3542 initlock\(&buf_table_lock, "buf_table"\);) 200.9517 Tj
+(3542 ) 21.8426 Tj
0 -436.6946 Td
-(3543 ) 21.8426 Tj
+(3543 initlock\(&bcache.lock, "bcache"\);) 174.7406 Tj
0 -446.1879 Td
(3544 ) 21.8426 Tj
0 -455.6813 Td
@@ -13287,73 +13391,74 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/bio.c Page 2) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/bio.c Page 2) 157.2665 Tj
0 -28.4801 Td
(3550 // Create linked list of buffers) 170.3721 Tj
0 -37.9735 Td
-(3551 bufhead.prev = &bufhead;) 135.4239 Tj
+(3551 bcache.head.prev = &bcache.head;) 170.3721 Tj
0 -47.4668 Td
-(3552 bufhead.next = &bufhead;) 135.4239 Tj
+(3552 bcache.head.next = &bcache.head;) 170.3721 Tj
0 -56.9602 Td
-(3553 for\(b = buf; b < buf+NBUF; b++\){) 170.3721 Tj
+(3553 for\(b = bcache.buf; b < bcache.buf+NBUF; b++\){) 231.5313 Tj
0 -66.4535 Td
-(3554 b->next = bufhead.next;) 139.7925 Tj
+(3554 b->next = bcache.head.next;) 157.2665 Tj
0 -75.9469 Td
-(3555 b->prev = &bufhead;) 122.3184 Tj
+(3555 b->prev = &bcache.head;) 139.7925 Tj
0 -85.4403 Td
-(3556 bufhead.next->prev = b;) 139.7925 Tj
+(3556 b->dev = -1;) 91.7388 Tj
0 -94.9336 Td
-(3557 bufhead.next = b;) 113.5814 Tj
+(3557 bcache.head.next->prev = b;) 157.2665 Tj
0 -104.427 Td
-(3558 }) 34.9481 Tj
+(3558 bcache.head.next = b;) 131.0554 Tj
0 -113.9203 Td
-(3559 }) 26.2111 Tj
+(3559 }) 34.9481 Tj
0 -123.4137 Td
-(3560 ) 21.8426 Tj
+(3560 }) 26.2111 Tj
0 -132.9071 Td
-(3561 // Look through buffer cache for sector on device dev.) 257.7424 Tj
+(3561 ) 21.8426 Tj
0 -142.4004 Td
-(3562 // If not found, allocate fresh block.) 187.8461 Tj
+(3562 // Look through buffer cache for sector on device dev.) 257.7424 Tj
0 -151.8938 Td
-(3563 // In either case, return locked buffer.) 196.5831 Tj
+(3563 // If not found, allocate fresh block.) 187.8461 Tj
0 -161.3871 Td
-(3564 static struct buf*) 100.4758 Tj
+(3564 // In either case, return locked buffer.) 196.5831 Tj
0 -170.8805 Td
-(3565 bget\(uint dev, uint sector\)) 139.7925 Tj
+(3565 static struct buf*) 100.4758 Tj
0 -180.3739 Td
-(3566 {) 26.2111 Tj
+(3566 bget\(uint dev, uint sector\)) 139.7925 Tj
0 -189.8672 Td
-(3567 struct buf *b;) 91.7388 Tj
+(3567 {) 26.2111 Tj
0 -199.3606 Td
-(3568 ) 21.8426 Tj
+(3568 struct buf *b;) 91.7388 Tj
0 -208.8539 Td
-(3569 acquire\(&buf_table_lock\);) 139.7925 Tj
+(3569 ) 21.8426 Tj
0 -218.3473 Td
-(3570 ) 21.8426 Tj
+(3570 acquire\(&bcache.lock\);) 126.6869 Tj
0 -227.8407 Td
-(3571 loop:) 48.0537 Tj
+(3571 ) 21.8426 Tj
0 -237.334 Td
-(3572 // Try for cached block.) 135.4239 Tj
+(3572 loop:) 48.0537 Tj
0 -246.8274 Td
-(3573 for\(b = bufhead.next; b != &bufhead; b = b->next\){) 249.0053 Tj
+(3573 // Try for cached block.) 135.4239 Tj
0 -256.3207 Td
-(3574 if\(\(b->flags & \(B_BUSY|B_VALID\)\) &&) 192.2146 Tj
+(3574 for\(b = bcache.head.next; b != &bcache.head; b = b->nex\
+t\){) 283.9534 Tj
0 -265.8141 Td
-(3575 b->dev == dev && b->sector == sector\){) 218.4257 Tj
+(3575 if\(b->dev == dev && b->sector == sector\){) 218.4257 Tj
0 -275.3075 Td
-(3576 if\(b->flags & B_BUSY\){) 144.161 Tj
+(3576 if\(!\(b->flags & B_BUSY\)\){) 157.2665 Tj
0 -284.8008 Td
-(3577 sleep\(buf, &buf_table_lock\);) 179.1091 Tj
+(3577 b->flags |= B_BUSY;) 139.7925 Tj
0 -294.2942 Td
-(3578 goto loop;) 100.4758 Tj
+(3578 release\(&bcache.lock\);) 152.898 Tj
0 -303.7875 Td
-(3579 }) 52.4222 Tj
+(3579 return b;) 96.1073 Tj
0 -313.2809 Td
-(3580 b->flags |= B_BUSY;) 131.0554 Tj
+(3580 }) 52.4222 Tj
0 -322.7743 Td
-(3581 release\(&buf_table_lock\);) 157.2665 Tj
+(3581 sleep\(b, &bcache.lock\);) 148.5295 Tj
0 -332.2676 Td
-(3582 return b;) 87.3703 Tj
+(3582 goto loop;) 91.7388 Tj
0 -341.761 Td
(3583 }) 43.6851 Tj
0 -351.2543 Td
@@ -13363,17 +13468,18 @@ q
0 -370.2411 Td
(3586 // Allocate fresh block.) 135.4239 Tj
0 -379.7344 Td
-(3587 for\(b = bufhead.prev; b != &bufhead; b = b->prev\){) 249.0053 Tj
+(3587 for\(b = bcache.head.prev; b != &bcache.head; b = b->pre\
+v\){) 283.9534 Tj
0 -389.2278 Td
(3588 if\(\(b->flags & B_BUSY\) == 0\){) 166.0035 Tj
0 -398.7211 Td
-(3589 b->flags = B_BUSY;) 126.6869 Tj
+(3589 b->dev = dev;) 104.8443 Tj
0 -408.2145 Td
-(3590 b->dev = dev;) 104.8443 Tj
+(3590 b->sector = sector;) 131.0554 Tj
0 -417.7079 Td
-(3591 b->sector = sector;) 131.0554 Tj
+(3591 b->flags = B_BUSY;) 126.6869 Tj
0 -427.2012 Td
-(3592 release\(&buf_table_lock\);) 157.2665 Tj
+(3592 release\(&bcache.lock\);) 144.161 Tj
0 -436.6946 Td
(3593 return b;) 87.3703 Tj
0 -446.1879 Td
@@ -13418,6 +13524,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -13435,7 +13543,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/bio.c Page 3) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/bio.c Page 3) 157.2665 Tj
0 -28.4801 Td
(3600 // Return a B_BUSY buf with the contents of the indicated \
disk sector.) 327.6386 Tj
@@ -13454,7 +13562,7 @@ disk sector.) 327.6386 Tj
0 -94.9336 Td
(3607 if\(!\(b->flags & B_VALID\)\)) 139.7925 Tj
0 -104.427 Td
-(3608 ide_rw\(b\);) 83.0018 Tj
+(3608 iderw\(b\);) 78.6333 Tj
0 -113.9203 Td
(3609 return b;) 69.8962 Tj
0 -123.4137 Td
@@ -13462,7 +13570,7 @@ disk sector.) 327.6386 Tj
0 -132.9071 Td
(3611 ) 21.8426 Tj
0 -142.4004 Td
-(3612 // Write buf's contents to disk. Must be locked.) 235.8998 Tj
+(3612 // Write b's contents to disk. Must be locked.) 227.1628 Tj
0 -151.8938 Td
(3613 void) 39.3166 Tj
0 -161.3871 Td
@@ -13476,13 +13584,13 @@ disk sector.) 327.6386 Tj
0 -199.3606 Td
(3618 b->flags |= B_DIRTY;) 117.9499 Tj
0 -208.8539 Td
-(3619 ide_rw\(b\);) 74.2647 Tj
+(3619 iderw\(b\);) 69.8962 Tj
0 -218.3473 Td
(3620 }) 26.2111 Tj
0 -227.8407 Td
(3621 ) 21.8426 Tj
0 -237.334 Td
-(3622 // Release the buffer buf.) 135.4239 Tj
+(3622 // Release the buffer b.) 126.6869 Tj
0 -246.8274 Td
(3623 void) 39.3166 Tj
0 -256.3207 Td
@@ -13496,7 +13604,7 @@ disk sector.) 327.6386 Tj
0 -294.2942 Td
(3628 ) 21.8426 Tj
0 -303.7875 Td
-(3629 acquire\(&buf_table_lock\);) 139.7925 Tj
+(3629 acquire\(&bcache.lock\);) 126.6869 Tj
0 -313.2809 Td
(3630 ) 21.8426 Tj
0 -322.7743 Td
@@ -13504,23 +13612,23 @@ disk sector.) 327.6386 Tj
0 -332.2676 Td
(3632 b->prev->next = b->next;) 135.4239 Tj
0 -341.761 Td
-(3633 b->next = bufhead.next;) 131.0554 Tj
+(3633 b->next = bcache.head.next;) 148.5295 Tj
0 -351.2543 Td
-(3634 b->prev = &bufhead;) 113.5814 Tj
+(3634 b->prev = &bcache.head;) 131.0554 Tj
0 -360.7477 Td
-(3635 bufhead.next->prev = b;) 131.0554 Tj
+(3635 bcache.head.next->prev = b;) 148.5295 Tj
0 -370.2411 Td
-(3636 bufhead.next = b;) 104.8443 Tj
+(3636 bcache.head.next = b;) 122.3184 Tj
0 -379.7344 Td
(3637 ) 21.8426 Tj
0 -389.2278 Td
(3638 b->flags &= ~B_BUSY;) 117.9499 Tj
0 -398.7211 Td
-(3639 wakeup\(buf\);) 83.0018 Tj
+(3639 wakeup\(b\);) 74.2647 Tj
0 -408.2145 Td
(3640 ) 21.8426 Tj
0 -417.7079 Td
-(3641 release\(&buf_table_lock\);) 139.7925 Tj
+(3641 release\(&bcache.lock\);) 126.6869 Tj
0 -427.2012 Td
(3642 }) 26.2111 Tj
0 -436.6946 Td
@@ -13555,7 +13663,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 1) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 1) 152.898 Tj
0 -28.4801 Td
(3650 // File system implementation. Four layers:) 214.0572 Tj
0 -37.9735 Td
@@ -13604,61 +13712,61 @@ ions) 283.9534 Tj
0 -218.3473 Td
(3670 #include "fs.h") 87.3703 Tj
0 -227.8407 Td
-(3671 #include "fsvar.h") 100.4758 Tj
+(3671 #include "file.h") 96.1073 Tj
0 -237.334 Td
-(3672 #include "dev.h") 91.7388 Tj
+(3672 ) 21.8426 Tj
0 -246.8274 Td
-(3673 ) 21.8426 Tj
+(3673 #define min\(a, b\) \(\(a\) < \(b\) ? \(a\) : \(b\)\)) 200.9517 Tj
0 -256.3207 Td
-(3674 #define min\(a, b\) \(\(a\) < \(b\) ? \(a\) : \(b\)\)) 200.9517 Tj
+(3674 static void itrunc\(struct inode*\);) 170.3721 Tj
0 -265.8141 Td
-(3675 static void itrunc\(struct inode*\);) 170.3721 Tj
+(3675 ) 21.8426 Tj
0 -275.3075 Td
-(3676 ) 21.8426 Tj
+(3676 // Read the super block.) 126.6869 Tj
0 -284.8008 Td
-(3677 // Read the super block.) 126.6869 Tj
+(3677 static void) 69.8962 Tj
0 -294.2942 Td
-(3678 static void) 69.8962 Tj
+(3678 readsb\(int dev, struct superblock *sb\)) 187.8461 Tj
0 -303.7875 Td
-(3679 readsb\(int dev, struct superblock *sb\)) 187.8461 Tj
+(3679 {) 26.2111 Tj
0 -313.2809 Td
-(3680 {) 26.2111 Tj
+(3680 struct buf *bp;) 96.1073 Tj
0 -322.7743 Td
-(3681 struct buf *bp;) 96.1073 Tj
+(3681 ) 21.8426 Tj
0 -332.2676 Td
-(3682 ) 21.8426 Tj
+(3682 bp = bread\(dev, 1\);) 113.5814 Tj
0 -341.761 Td
-(3683 bp = bread\(dev, 1\);) 113.5814 Tj
+(3683 memmove\(sb, bp->data, sizeof\(*sb\)\);) 183.4776 Tj
0 -351.2543 Td
-(3684 memmove\(sb, bp->data, sizeof\(*sb\)\);) 183.4776 Tj
+(3684 brelse\(bp\);) 78.6333 Tj
0 -360.7477 Td
-(3685 brelse\(bp\);) 78.6333 Tj
+(3685 }) 26.2111 Tj
0 -370.2411 Td
-(3686 }) 26.2111 Tj
+(3686 ) 21.8426 Tj
0 -379.7344 Td
-(3687 ) 21.8426 Tj
+(3687 // Zero a block.) 91.7388 Tj
0 -389.2278 Td
-(3688 // Zero a block.) 91.7388 Tj
+(3688 static void) 69.8962 Tj
0 -398.7211 Td
-(3689 static void) 69.8962 Tj
+(3689 bzero\(int dev, int bno\)) 122.3184 Tj
0 -408.2145 Td
-(3690 bzero\(int dev, int bno\)) 122.3184 Tj
+(3690 {) 26.2111 Tj
0 -417.7079 Td
-(3691 {) 26.2111 Tj
+(3691 struct buf *bp;) 96.1073 Tj
0 -427.2012 Td
-(3692 struct buf *bp;) 96.1073 Tj
+(3692 ) 21.8426 Tj
0 -436.6946 Td
-(3693 ) 21.8426 Tj
+(3693 bp = bread\(dev, bno\);) 122.3184 Tj
0 -446.1879 Td
-(3694 bp = bread\(dev, bno\);) 122.3184 Tj
+(3694 memset\(bp->data, 0, BSIZE\);) 148.5295 Tj
0 -455.6813 Td
-(3695 memset\(bp->data, 0, BSIZE\);) 148.5295 Tj
+(3695 bwrite\(bp\);) 78.6333 Tj
0 -465.1747 Td
-(3696 bwrite\(bp\);) 78.6333 Tj
+(3696 brelse\(bp\);) 78.6333 Tj
0 -474.668 Td
-(3697 brelse\(bp\);) 78.6333 Tj
+(3697 }) 26.2111 Tj
0 -484.1614 Td
-(3698 }) 26.2111 Tj
+(3698 ) 21.8426 Tj
0 -493.6547 Td
(3699 ) 21.8426 Tj
0 -522.1348 Td
@@ -13691,6 +13799,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -13708,7 +13818,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 2) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 2) 152.898 Tj
0 -28.4801 Td
(3700 // Blocks.) 65.5277 Tj
0 -37.9735 Td
@@ -13829,7 +13939,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 3) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 3) 152.898 Tj
0 -28.4801 Td
(3750 // Inodes.) 65.5277 Tj
0 -37.9735 Td
@@ -13925,13 +14035,13 @@ ero) 288.322 Tj
0 -408.2145 Td
(3790 {) 26.2111 Tj
0 -417.7079 Td
-(3791 initlock\(&icache.lock, "icache.lock"\);) 196.5831 Tj
+(3791 initlock\(&icache.lock, "icache"\);) 174.7406 Tj
0 -427.2012 Td
(3792 }) 26.2111 Tj
0 -436.6946 Td
(3793 ) 21.8426 Tj
0 -446.1879 Td
-(3794 ) 21.8426 Tj
+(3794 static struct inode* iget\(uint dev, uint inum\);) 227.1628 Tj
0 -455.6813 Td
(3795 ) 21.8426 Tj
0 -465.1747 Td
@@ -13972,6 +14082,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -13989,100 +14101,98 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 4) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 4) 152.898 Tj
0 -28.4801 Td
-(3800 // Find the inode with number inum on device dev) 231.5313 Tj
+(3800 // Allocate a new inode with the given type on device dev.) 275.2164 Tj
0 -37.9735 Td
-(3801 // and return the in-memory copy.) 166.0035 Tj
+(3801 struct inode*) 78.6333 Tj
0 -47.4668 Td
-(3802 static struct inode*) 109.2129 Tj
+(3802 ialloc\(uint dev, short type\)) 144.161 Tj
0 -56.9602 Td
-(3803 iget\(uint dev, uint inum\)) 131.0554 Tj
+(3803 {) 26.2111 Tj
0 -66.4535 Td
-(3804 {) 26.2111 Tj
+(3804 int inum;) 69.8962 Tj
0 -75.9469 Td
-(3805 struct inode *ip, *empty;) 139.7925 Tj
+(3805 struct buf *bp;) 96.1073 Tj
0 -85.4403 Td
-(3806 ) 21.8426 Tj
+(3806 struct dinode *dip;) 113.5814 Tj
0 -94.9336 Td
-(3807 acquire\(&icache.lock\);) 126.6869 Tj
+(3807 struct superblock sb;) 122.3184 Tj
0 -104.427 Td
(3808 ) 21.8426 Tj
0 -113.9203 Td
-(3809 // Try for cached inode.) 135.4239 Tj
+(3809 readsb\(dev, &sb\);) 104.8443 Tj
0 -123.4137 Td
-(3810 empty = 0;) 74.2647 Tj
+(3810 for\(inum = 1; inum < sb.ninodes; inum++\){ // loop ove\
+r inode blocks) 327.6386 Tj
0 -132.9071 Td
-(3811 for\(ip = &icache.inode[0]; ip < &icache.inode[NINODE]; \
-ip++\){) 297.059 Tj
+(3811 bp = bread\(dev, IBLOCK\(inum\)\);) 170.3721 Tj
0 -142.4004 Td
-(3812 if\(ip->ref > 0 && ip->dev == dev && ip->inum == inum\)\
-{) 275.2164 Tj
+(3812 dip = \(struct dinode*\)bp->data + inum%IPB;) 222.7942 Tj
0 -151.8938 Td
-(3813 ip->ref++;) 91.7388 Tj
+(3813 if\(dip->type == 0\){ // a free inode) 196.5831 Tj
0 -161.3871 Td
-(3814 release\(&icache.lock\);) 144.161 Tj
+(3814 memset\(dip, 0, sizeof\(*dip\)\);) 174.7406 Tj
0 -170.8805 Td
-(3815 return ip;) 91.7388 Tj
+(3815 dip->type = type;) 122.3184 Tj
0 -180.3739 Td
-(3816 }) 43.6851 Tj
+(3816 bwrite\(bp\); // mark it allocated on the disk) 249.0053 Tj
0 -189.8672 Td
-(3817 if\(empty == 0 && ip->ref == 0\) // Remember empty \
-slot.) 288.322 Tj
+(3817 brelse\(bp\);) 96.1073 Tj
0 -199.3606 Td
-(3818 empty = ip;) 96.1073 Tj
+(3818 return iget\(dev, inum\);) 148.5295 Tj
0 -208.8539 Td
-(3819 }) 34.9481 Tj
+(3819 }) 43.6851 Tj
0 -218.3473 Td
-(3820 ) 21.8426 Tj
+(3820 brelse\(bp\);) 87.3703 Tj
0 -227.8407 Td
-(3821 // Allocate fresh inode.) 135.4239 Tj
+(3821 }) 34.9481 Tj
0 -237.334 Td
-(3822 if\(empty == 0\)) 91.7388 Tj
+(3822 panic\("ialloc: no inodes"\);) 148.5295 Tj
0 -246.8274 Td
-(3823 panic\("iget: no inodes"\);) 148.5295 Tj
+(3823 }) 26.2111 Tj
0 -256.3207 Td
(3824 ) 21.8426 Tj
0 -265.8141 Td
-(3825 ip = empty;) 78.6333 Tj
+(3825 // Copy inode, which has changed, from memory to disk.) 257.7424 Tj
0 -275.3075 Td
-(3826 ip->dev = dev;) 91.7388 Tj
+(3826 void) 39.3166 Tj
0 -284.8008 Td
-(3827 ip->inum = inum;) 100.4758 Tj
+(3827 iupdate\(struct inode *ip\)) 131.0554 Tj
0 -294.2942 Td
-(3828 ip->ref = 1;) 83.0018 Tj
+(3828 {) 26.2111 Tj
0 -303.7875 Td
-(3829 ip->flags = 0;) 91.7388 Tj
+(3829 struct buf *bp;) 96.1073 Tj
0 -313.2809 Td
-(3830 release\(&icache.lock\);) 126.6869 Tj
+(3830 struct dinode *dip;) 113.5814 Tj
0 -322.7743 Td
(3831 ) 21.8426 Tj
0 -332.2676 Td
-(3832 return ip;) 74.2647 Tj
+(3832 bp = bread\(ip->dev, IBLOCK\(ip->inum\)\);) 196.5831 Tj
0 -341.761 Td
-(3833 }) 26.2111 Tj
+(3833 dip = \(struct dinode*\)bp->data + ip->inum%IPB;) 231.5313 Tj
0 -351.2543 Td
-(3834 ) 21.8426 Tj
+(3834 dip->type = ip->type;) 122.3184 Tj
0 -360.7477 Td
-(3835 // Increment reference count for ip.) 179.1091 Tj
+(3835 dip->major = ip->major;) 131.0554 Tj
0 -370.2411 Td
-(3836 // Returns ip to enable ip = idup\(ip1\) idiom.) 218.4257 Tj
+(3836 dip->minor = ip->minor;) 131.0554 Tj
0 -379.7344 Td
-(3837 struct inode*) 78.6333 Tj
+(3837 dip->nlink = ip->nlink;) 131.0554 Tj
0 -389.2278 Td
-(3838 idup\(struct inode *ip\)) 117.9499 Tj
+(3838 dip->size = ip->size;) 122.3184 Tj
0 -398.7211 Td
-(3839 {) 26.2111 Tj
+(3839 memmove\(dip->addrs, ip->addrs, sizeof\(ip->addrs\)\);) 249.0053 Tj
0 -408.2145 Td
-(3840 acquire\(&icache.lock\);) 126.6869 Tj
+(3840 bwrite\(bp\);) 78.6333 Tj
0 -417.7079 Td
-(3841 ip->ref++;) 74.2647 Tj
+(3841 brelse\(bp\);) 78.6333 Tj
0 -427.2012 Td
-(3842 release\(&icache.lock\);) 126.6869 Tj
+(3842 }) 26.2111 Tj
0 -436.6946 Td
-(3843 return ip;) 74.2647 Tj
+(3843 ) 21.8426 Tj
0 -446.1879 Td
-(3844 }) 26.2111 Tj
+(3844 ) 21.8426 Tj
0 -455.6813 Td
(3845 ) 21.8426 Tj
0 -465.1747 Td
@@ -14111,97 +14221,100 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 5) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 5) 152.898 Tj
0 -28.4801 Td
-(3850 // Lock the given inode.) 126.6869 Tj
+(3850 // Find the inode with number inum on device dev) 231.5313 Tj
0 -37.9735 Td
-(3851 void) 39.3166 Tj
+(3851 // and return the in-memory copy.) 166.0035 Tj
0 -47.4668 Td
-(3852 ilock\(struct inode *ip\)) 122.3184 Tj
+(3852 static struct inode*) 109.2129 Tj
0 -56.9602 Td
-(3853 {) 26.2111 Tj
+(3853 iget\(uint dev, uint inum\)) 131.0554 Tj
0 -66.4535 Td
-(3854 struct buf *bp;) 96.1073 Tj
+(3854 {) 26.2111 Tj
0 -75.9469 Td
-(3855 struct dinode *dip;) 113.5814 Tj
+(3855 struct inode *ip, *empty;) 139.7925 Tj
0 -85.4403 Td
(3856 ) 21.8426 Tj
0 -94.9336 Td
-(3857 if\(ip == 0 || ip->ref < 1\)) 144.161 Tj
+(3857 acquire\(&icache.lock\);) 126.6869 Tj
0 -104.427 Td
-(3858 panic\("ilock"\);) 104.8443 Tj
+(3858 ) 21.8426 Tj
0 -113.9203 Td
-(3859 ) 21.8426 Tj
+(3859 // Try for cached inode.) 135.4239 Tj
0 -123.4137 Td
-(3860 acquire\(&icache.lock\);) 126.6869 Tj
+(3860 empty = 0;) 74.2647 Tj
0 -132.9071 Td
-(3861 while\(ip->flags & I_BUSY\)) 139.7925 Tj
+(3861 for\(ip = &icache.inode[0]; ip < &icache.inode[NINODE]; \
+ip++\){) 297.059 Tj
0 -142.4004 Td
-(3862 sleep\(ip, &icache.lock\);) 144.161 Tj
+(3862 if\(ip->ref > 0 && ip->dev == dev && ip->inum == inum\)\
+{) 275.2164 Tj
0 -151.8938 Td
-(3863 ip->flags |= I_BUSY;) 117.9499 Tj
+(3863 ip->ref++;) 91.7388 Tj
0 -161.3871 Td
-(3864 release\(&icache.lock\);) 126.6869 Tj
+(3864 release\(&icache.lock\);) 144.161 Tj
0 -170.8805 Td
-(3865 ) 21.8426 Tj
+(3865 return ip;) 91.7388 Tj
0 -180.3739 Td
-(3866 if\(!\(ip->flags & I_VALID\)\){) 148.5295 Tj
+(3866 }) 43.6851 Tj
0 -189.8672 Td
-(3867 bp = bread\(ip->dev, IBLOCK\(ip->inum\)\);) 205.3202 Tj
+(3867 if\(empty == 0 && ip->ref == 0\) // Remember empty \
+slot.) 288.322 Tj
0 -199.3606 Td
-(3868 dip = \(struct dinode*\)bp->data + ip->inum%IPB;) 240.2683 Tj
+(3868 empty = ip;) 96.1073 Tj
0 -208.8539 Td
-(3869 ip->type = dip->type;) 131.0554 Tj
+(3869 }) 34.9481 Tj
0 -218.3473 Td
-(3870 ip->major = dip->major;) 139.7925 Tj
+(3870 ) 21.8426 Tj
0 -227.8407 Td
-(3871 ip->minor = dip->minor;) 139.7925 Tj
+(3871 // Allocate fresh inode.) 135.4239 Tj
0 -237.334 Td
-(3872 ip->nlink = dip->nlink;) 139.7925 Tj
+(3872 if\(empty == 0\)) 91.7388 Tj
0 -246.8274 Td
-(3873 ip->size = dip->size;) 131.0554 Tj
+(3873 panic\("iget: no inodes"\);) 148.5295 Tj
0 -256.3207 Td
-(3874 memmove\(ip->addrs, dip->addrs, sizeof\(ip->addrs\)\);) 257.7424 Tj
+(3874 ) 21.8426 Tj
0 -265.8141 Td
-(3875 brelse\(bp\);) 87.3703 Tj
+(3875 ip = empty;) 78.6333 Tj
0 -275.3075 Td
-(3876 ip->flags |= I_VALID;) 131.0554 Tj
+(3876 ip->dev = dev;) 91.7388 Tj
0 -284.8008 Td
-(3877 if\(ip->type == 0\)) 113.5814 Tj
+(3877 ip->inum = inum;) 100.4758 Tj
0 -294.2942 Td
-(3878 panic\("ilock: no type"\);) 152.898 Tj
+(3878 ip->ref = 1;) 83.0018 Tj
0 -303.7875 Td
-(3879 }) 34.9481 Tj
+(3879 ip->flags = 0;) 91.7388 Tj
0 -313.2809 Td
-(3880 }) 26.2111 Tj
+(3880 release\(&icache.lock\);) 126.6869 Tj
0 -322.7743 Td
(3881 ) 21.8426 Tj
0 -332.2676 Td
-(3882 // Unlock the given inode.) 135.4239 Tj
+(3882 return ip;) 74.2647 Tj
0 -341.761 Td
-(3883 void) 39.3166 Tj
+(3883 }) 26.2111 Tj
0 -351.2543 Td
-(3884 iunlock\(struct inode *ip\)) 131.0554 Tj
+(3884 ) 21.8426 Tj
0 -360.7477 Td
-(3885 {) 26.2111 Tj
+(3885 // Increment reference count for ip.) 179.1091 Tj
0 -370.2411 Td
-(3886 if\(ip == 0 || !\(ip->flags & I_BUSY\) || ip->ref < 1\)) 253.3738 Tj
+(3886 // Returns ip to enable ip = idup\(ip1\) idiom.) 218.4257 Tj
0 -379.7344 Td
-(3887 panic\("iunlock"\);) 113.5814 Tj
+(3887 struct inode*) 78.6333 Tj
0 -389.2278 Td
-(3888 ) 21.8426 Tj
+(3888 idup\(struct inode *ip\)) 117.9499 Tj
0 -398.7211 Td
-(3889 acquire\(&icache.lock\);) 126.6869 Tj
+(3889 {) 26.2111 Tj
0 -408.2145 Td
-(3890 ip->flags &= ~I_BUSY;) 122.3184 Tj
+(3890 acquire\(&icache.lock\);) 126.6869 Tj
0 -417.7079 Td
-(3891 wakeup\(ip\);) 78.6333 Tj
+(3891 ip->ref++;) 74.2647 Tj
0 -427.2012 Td
(3892 release\(&icache.lock\);) 126.6869 Tj
0 -436.6946 Td
-(3893 }) 26.2111 Tj
+(3893 return ip;) 74.2647 Tj
0 -446.1879 Td
-(3894 ) 21.8426 Tj
+(3894 }) 26.2111 Tj
0 -455.6813 Td
(3895 ) 21.8426 Tj
0 -465.1747 Td
@@ -14242,6 +14355,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -14259,96 +14374,95 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 6) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 6) 152.898 Tj
0 -28.4801 Td
-(3900 // Caller holds reference to unlocked ip. Drop reference.) 275.2164 Tj
+(3900 // Lock the given inode.) 126.6869 Tj
0 -37.9735 Td
(3901 void) 39.3166 Tj
0 -47.4668 Td
-(3902 iput\(struct inode *ip\)) 117.9499 Tj
+(3902 ilock\(struct inode *ip\)) 122.3184 Tj
0 -56.9602 Td
(3903 {) 26.2111 Tj
0 -66.4535 Td
-(3904 acquire\(&icache.lock\);) 126.6869 Tj
+(3904 struct buf *bp;) 96.1073 Tj
0 -75.9469 Td
-(3905 if\(ip->ref == 1 && \(ip->flags & I_VALID\) && ip->nlink\
- == 0\){) 292.6905 Tj
+(3905 struct dinode *dip;) 113.5814 Tj
0 -85.4403 Td
-(3906 // inode is no longer used: truncate and free inode.) 266.4794 Tj
+(3906 ) 21.8426 Tj
0 -94.9336 Td
-(3907 if\(ip->flags & I_BUSY\)) 135.4239 Tj
+(3907 if\(ip == 0 || ip->ref < 1\)) 144.161 Tj
0 -104.427 Td
-(3908 panic\("iput busy"\);) 131.0554 Tj
+(3908 panic\("ilock"\);) 104.8443 Tj
0 -113.9203 Td
-(3909 ip->flags |= I_BUSY;) 126.6869 Tj
+(3909 ) 21.8426 Tj
0 -123.4137 Td
-(3910 release\(&icache.lock\);) 135.4239 Tj
+(3910 acquire\(&icache.lock\);) 126.6869 Tj
0 -132.9071 Td
-(3911 itrunc\(ip\);) 87.3703 Tj
+(3911 while\(ip->flags & I_BUSY\)) 139.7925 Tj
0 -142.4004 Td
-(3912 ip->type = 0;) 96.1073 Tj
+(3912 sleep\(ip, &icache.lock\);) 144.161 Tj
0 -151.8938 Td
-(3913 iupdate\(ip\);) 91.7388 Tj
+(3913 ip->flags |= I_BUSY;) 117.9499 Tj
0 -161.3871 Td
-(3914 acquire\(&icache.lock\);) 135.4239 Tj
+(3914 release\(&icache.lock\);) 126.6869 Tj
0 -170.8805 Td
-(3915 ip->flags &= ~I_BUSY;) 131.0554 Tj
+(3915 ) 21.8426 Tj
0 -180.3739 Td
-(3916 wakeup\(ip\);) 87.3703 Tj
+(3916 if\(!\(ip->flags & I_VALID\)\){) 148.5295 Tj
0 -189.8672 Td
-(3917 }) 34.9481 Tj
+(3917 bp = bread\(ip->dev, IBLOCK\(ip->inum\)\);) 205.3202 Tj
0 -199.3606 Td
-(3918 ip->ref--;) 74.2647 Tj
+(3918 dip = \(struct dinode*\)bp->data + ip->inum%IPB;) 240.2683 Tj
0 -208.8539 Td
-(3919 release\(&icache.lock\);) 126.6869 Tj
+(3919 ip->type = dip->type;) 131.0554 Tj
0 -218.3473 Td
-(3920 }) 26.2111 Tj
+(3920 ip->major = dip->major;) 139.7925 Tj
0 -227.8407 Td
-(3921 ) 21.8426 Tj
+(3921 ip->minor = dip->minor;) 139.7925 Tj
0 -237.334 Td
-(3922 // Common idiom: unlock, then put.) 170.3721 Tj
+(3922 ip->nlink = dip->nlink;) 139.7925 Tj
0 -246.8274 Td
-(3923 void) 39.3166 Tj
+(3923 ip->size = dip->size;) 131.0554 Tj
0 -256.3207 Td
-(3924 iunlockput\(struct inode *ip\)) 144.161 Tj
+(3924 memmove\(ip->addrs, dip->addrs, sizeof\(ip->addrs\)\);) 257.7424 Tj
0 -265.8141 Td
-(3925 {) 26.2111 Tj
+(3925 brelse\(bp\);) 87.3703 Tj
0 -275.3075 Td
-(3926 iunlock\(ip\);) 83.0018 Tj
+(3926 ip->flags |= I_VALID;) 131.0554 Tj
0 -284.8008 Td
-(3927 iput\(ip\);) 69.8962 Tj
+(3927 if\(ip->type == 0\)) 113.5814 Tj
0 -294.2942 Td
-(3928 }) 26.2111 Tj
+(3928 panic\("ilock: no type"\);) 152.898 Tj
0 -303.7875 Td
-(3929 ) 21.8426 Tj
+(3929 }) 34.9481 Tj
0 -313.2809 Td
-(3930 ) 21.8426 Tj
+(3930 }) 26.2111 Tj
0 -322.7743 Td
(3931 ) 21.8426 Tj
0 -332.2676 Td
-(3932 ) 21.8426 Tj
+(3932 // Unlock the given inode.) 135.4239 Tj
0 -341.761 Td
-(3933 ) 21.8426 Tj
+(3933 void) 39.3166 Tj
0 -351.2543 Td
-(3934 ) 21.8426 Tj
+(3934 iunlock\(struct inode *ip\)) 131.0554 Tj
0 -360.7477 Td
-(3935 ) 21.8426 Tj
+(3935 {) 26.2111 Tj
0 -370.2411 Td
-(3936 ) 21.8426 Tj
+(3936 if\(ip == 0 || !\(ip->flags & I_BUSY\) || ip->ref < 1\)) 253.3738 Tj
0 -379.7344 Td
-(3937 ) 21.8426 Tj
+(3937 panic\("iunlock"\);) 113.5814 Tj
0 -389.2278 Td
(3938 ) 21.8426 Tj
0 -398.7211 Td
-(3939 ) 21.8426 Tj
+(3939 acquire\(&icache.lock\);) 126.6869 Tj
0 -408.2145 Td
-(3940 ) 21.8426 Tj
+(3940 ip->flags &= ~I_BUSY;) 122.3184 Tj
0 -417.7079 Td
-(3941 ) 21.8426 Tj
+(3941 wakeup\(ip\);) 78.6333 Tj
0 -427.2012 Td
-(3942 ) 21.8426 Tj
+(3942 release\(&icache.lock\);) 126.6869 Tj
0 -436.6946 Td
-(3943 ) 21.8426 Tj
+(3943 }) 26.2111 Tj
0 -446.1879 Td
(3944 ) 21.8426 Tj
0 -455.6813 Td
@@ -14379,94 +14493,94 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 7) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 7) 152.898 Tj
0 -28.4801 Td
-(3950 // Allocate a new inode with the given type on device dev.) 275.2164 Tj
+(3950 // Caller holds reference to unlocked ip. Drop reference.) 275.2164 Tj
0 -37.9735 Td
-(3951 struct inode*) 78.6333 Tj
+(3951 void) 39.3166 Tj
0 -47.4668 Td
-(3952 ialloc\(uint dev, short type\)) 144.161 Tj
+(3952 iput\(struct inode *ip\)) 117.9499 Tj
0 -56.9602 Td
(3953 {) 26.2111 Tj
0 -66.4535 Td
-(3954 int inum;) 69.8962 Tj
+(3954 acquire\(&icache.lock\);) 126.6869 Tj
0 -75.9469 Td
-(3955 struct buf *bp;) 96.1073 Tj
+(3955 if\(ip->ref == 1 && \(ip->flags & I_VALID\) && ip->nlink\
+ == 0\){) 292.6905 Tj
0 -85.4403 Td
-(3956 struct dinode *dip;) 113.5814 Tj
+(3956 // inode is no longer used: truncate and free inode.) 266.4794 Tj
0 -94.9336 Td
-(3957 struct superblock sb;) 122.3184 Tj
+(3957 if\(ip->flags & I_BUSY\)) 135.4239 Tj
0 -104.427 Td
-(3958 ) 21.8426 Tj
+(3958 panic\("iput busy"\);) 131.0554 Tj
0 -113.9203 Td
-(3959 readsb\(dev, &sb\);) 104.8443 Tj
+(3959 ip->flags |= I_BUSY;) 126.6869 Tj
0 -123.4137 Td
-(3960 for\(inum = 1; inum < sb.ninodes; inum++\){ // loop ove\
-r inode blocks) 327.6386 Tj
+(3960 release\(&icache.lock\);) 135.4239 Tj
0 -132.9071 Td
-(3961 bp = bread\(dev, IBLOCK\(inum\)\);) 170.3721 Tj
+(3961 itrunc\(ip\);) 87.3703 Tj
0 -142.4004 Td
-(3962 dip = \(struct dinode*\)bp->data + inum%IPB;) 222.7942 Tj
+(3962 ip->type = 0;) 96.1073 Tj
0 -151.8938 Td
-(3963 if\(dip->type == 0\){ // a free inode) 196.5831 Tj
+(3963 iupdate\(ip\);) 91.7388 Tj
0 -161.3871 Td
-(3964 memset\(dip, 0, sizeof\(*dip\)\);) 174.7406 Tj
+(3964 acquire\(&icache.lock\);) 135.4239 Tj
0 -170.8805 Td
-(3965 dip->type = type;) 122.3184 Tj
+(3965 ip->flags = 0;) 100.4758 Tj
0 -180.3739 Td
-(3966 bwrite\(bp\); // mark it allocated on the disk) 249.0053 Tj
+(3966 wakeup\(ip\);) 87.3703 Tj
0 -189.8672 Td
-(3967 brelse\(bp\);) 96.1073 Tj
+(3967 }) 34.9481 Tj
0 -199.3606 Td
-(3968 return iget\(dev, inum\);) 148.5295 Tj
+(3968 ip->ref--;) 74.2647 Tj
0 -208.8539 Td
-(3969 }) 43.6851 Tj
+(3969 release\(&icache.lock\);) 126.6869 Tj
0 -218.3473 Td
-(3970 brelse\(bp\);) 87.3703 Tj
+(3970 }) 26.2111 Tj
0 -227.8407 Td
-(3971 }) 34.9481 Tj
+(3971 ) 21.8426 Tj
0 -237.334 Td
-(3972 panic\("ialloc: no inodes"\);) 148.5295 Tj
+(3972 // Common idiom: unlock, then put.) 170.3721 Tj
0 -246.8274 Td
-(3973 }) 26.2111 Tj
+(3973 void) 39.3166 Tj
0 -256.3207 Td
-(3974 ) 21.8426 Tj
+(3974 iunlockput\(struct inode *ip\)) 144.161 Tj
0 -265.8141 Td
-(3975 // Copy inode, which has changed, from memory to disk.) 257.7424 Tj
+(3975 {) 26.2111 Tj
0 -275.3075 Td
-(3976 void) 39.3166 Tj
+(3976 iunlock\(ip\);) 83.0018 Tj
0 -284.8008 Td
-(3977 iupdate\(struct inode *ip\)) 131.0554 Tj
+(3977 iput\(ip\);) 69.8962 Tj
0 -294.2942 Td
-(3978 {) 26.2111 Tj
+(3978 }) 26.2111 Tj
0 -303.7875 Td
-(3979 struct buf *bp;) 96.1073 Tj
+(3979 ) 21.8426 Tj
0 -313.2809 Td
-(3980 struct dinode *dip;) 113.5814 Tj
+(3980 ) 21.8426 Tj
0 -322.7743 Td
(3981 ) 21.8426 Tj
0 -332.2676 Td
-(3982 bp = bread\(ip->dev, IBLOCK\(ip->inum\)\);) 196.5831 Tj
+(3982 ) 21.8426 Tj
0 -341.761 Td
-(3983 dip = \(struct dinode*\)bp->data + ip->inum%IPB;) 231.5313 Tj
+(3983 ) 21.8426 Tj
0 -351.2543 Td
-(3984 dip->type = ip->type;) 122.3184 Tj
+(3984 ) 21.8426 Tj
0 -360.7477 Td
-(3985 dip->major = ip->major;) 131.0554 Tj
+(3985 ) 21.8426 Tj
0 -370.2411 Td
-(3986 dip->minor = ip->minor;) 131.0554 Tj
+(3986 ) 21.8426 Tj
0 -379.7344 Td
-(3987 dip->nlink = ip->nlink;) 131.0554 Tj
+(3987 ) 21.8426 Tj
0 -389.2278 Td
-(3988 dip->size = ip->size;) 122.3184 Tj
+(3988 ) 21.8426 Tj
0 -398.7211 Td
-(3989 memmove\(dip->addrs, ip->addrs, sizeof\(ip->addrs\)\);) 249.0053 Tj
+(3989 ) 21.8426 Tj
0 -408.2145 Td
-(3990 bwrite\(bp\);) 78.6333 Tj
+(3990 ) 21.8426 Tj
0 -417.7079 Td
-(3991 brelse\(bp\);) 78.6333 Tj
+(3991 ) 21.8426 Tj
0 -427.2012 Td
-(3992 }) 26.2111 Tj
+(3992 ) 21.8426 Tj
0 -436.6946 Td
(3993 ) 21.8426 Tj
0 -446.1879 Td
@@ -14511,6 +14625,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -14528,7 +14644,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 8) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 8) 152.898 Tj
0 -28.4801 Td
(4000 // Inode contents) 96.1073 Tj
0 -37.9735 Td
@@ -14550,12 +14666,11 @@ re) 283.9534 Tj
(4007 // Return the disk block address of the nth block in inode\
ip.) 292.6905 Tj
0 -104.427 Td
-(4008 // If there is no such block, alloc controls whether one i\
-s allocated.) 327.6386 Tj
+(4008 // If there is no such block, bmap allocates one.) 235.8998 Tj
0 -113.9203 Td
(4009 static uint) 69.8962 Tj
0 -123.4137 Td
-(4010 bmap\(struct inode *ip, uint bn, int alloc\)) 205.3202 Tj
+(4010 bmap\(struct inode *ip, uint bn\)) 157.2665 Tj
0 -132.9071 Td
(4011 {) 26.2111 Tj
0 -142.4004 Td
@@ -14567,71 +14682,71 @@ s allocated.) 327.6386 Tj
0 -170.8805 Td
(4015 if\(bn < NDIRECT\){) 104.8443 Tj
0 -180.3739 Td
-(4016 if\(\(addr = ip->addrs[bn]\) == 0\){) 179.1091 Tj
+(4016 if\(\(addr = ip->addrs[bn]\) == 0\)) 174.7406 Tj
0 -189.8672 Td
-(4017 if\(!alloc\)) 91.7388 Tj
+(4017 ip->addrs[bn] = addr = balloc\(ip->dev\);) 218.4257 Tj
0 -199.3606 Td
-(4018 return -1;) 100.4758 Tj
+(4018 return addr;) 91.7388 Tj
0 -208.8539 Td
-(4019 ip->addrs[bn] = addr = balloc\(ip->dev\);) 218.4257 Tj
+(4019 }) 34.9481 Tj
0 -218.3473 Td
-(4020 }) 43.6851 Tj
+(4020 bn -= NDIRECT;) 91.7388 Tj
0 -227.8407 Td
-(4021 return addr;) 91.7388 Tj
+(4021 ) 21.8426 Tj
0 -237.334 Td
-(4022 }) 34.9481 Tj
+(4022 if\(bn < NINDIRECT\){) 113.5814 Tj
0 -246.8274 Td
-(4023 bn -= NDIRECT;) 91.7388 Tj
+(4023 // Load indirect block, allocating if necessary.) 249.0053 Tj
0 -256.3207 Td
-(4024 ) 21.8426 Tj
+(4024 if\(\(addr = ip->addrs[NDIRECT]\) == 0\)) 196.5831 Tj
0 -265.8141 Td
-(4025 if\(bn < NINDIRECT\){) 113.5814 Tj
+(4025 ip->addrs[NDIRECT] = addr = balloc\(ip->dev\);) 240.2683 Tj
0 -275.3075 Td
-(4026 // Load indirect block, allocating if necessary.) 249.0053 Tj
+(4026 bp = bread\(ip->dev, addr\);) 152.898 Tj
0 -284.8008 Td
-(4027 if\(\(addr = ip->addrs[INDIRECT]\) == 0\){) 205.3202 Tj
+(4027 a = \(uint*\)bp->data;) 126.6869 Tj
0 -294.2942 Td
-(4028 if\(!alloc\)) 91.7388 Tj
+(4028 if\(\(addr = a[bn]\) == 0\){) 144.161 Tj
0 -303.7875 Td
-(4029 return -1;) 100.4758 Tj
+(4029 a[bn] = addr = balloc\(ip->dev\);) 183.4776 Tj
0 -313.2809 Td
-(4030 ip->addrs[INDIRECT] = addr = balloc\(ip->dev\);) 244.6368 Tj
+(4030 bwrite\(bp\);) 96.1073 Tj
0 -322.7743 Td
(4031 }) 43.6851 Tj
0 -332.2676 Td
-(4032 bp = bread\(ip->dev, addr\);) 152.898 Tj
+(4032 brelse\(bp\);) 87.3703 Tj
0 -341.761 Td
-(4033 a = \(uint*\)bp->data;) 126.6869 Tj
+(4033 return addr;) 91.7388 Tj
0 -351.2543 Td
-(4034 ) 21.8426 Tj
+(4034 }) 34.9481 Tj
0 -360.7477 Td
-(4035 if\(\(addr = a[bn]\) == 0\){) 144.161 Tj
+(4035 ) 21.8426 Tj
0 -370.2411 Td
-(4036 if\(!alloc\){) 96.1073 Tj
+(4036 panic\("bmap: out of range"\);) 152.898 Tj
0 -379.7344 Td
-(4037 brelse\(bp\);) 104.8443 Tj
+(4037 }) 26.2111 Tj
0 -389.2278 Td
-(4038 return -1;) 100.4758 Tj
+(4038 ) 21.8426 Tj
0 -398.7211 Td
-(4039 }) 52.4222 Tj
+(4039 ) 21.8426 Tj
0 -408.2145 Td
-(4040 a[bn] = addr = balloc\(ip->dev\);) 183.4776 Tj
+(4040 ) 21.8426 Tj
0 -417.7079 Td
-(4041 bwrite\(bp\);) 96.1073 Tj
+(4041 ) 21.8426 Tj
0 -427.2012 Td
-(4042 }) 43.6851 Tj
+(4042 ) 21.8426 Tj
0 -436.6946 Td
-(4043 brelse\(bp\);) 87.3703 Tj
+(4043 ) 21.8426 Tj
0 -446.1879 Td
-(4044 return addr;) 91.7388 Tj
+(4044 ) 21.8426 Tj
0 -455.6813 Td
-(4045 }) 34.9481 Tj
+(4045 ) 21.8426 Tj
0 -465.1747 Td
(4046 ) 21.8426 Tj
0 -474.668 Td
-(4047 panic\("bmap: out of range"\);) 152.898 Tj
+(4047 ) 21.8426 Tj
0 -484.1614 Td
-(4048 }) 26.2111 Tj
+(4048 ) 21.8426 Tj
0 -493.6547 Td
(4049 ) 21.8426 Tj
0 -522.1348 Td
@@ -14652,93 +14767,93 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 9) 152.898 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 9) 152.898 Tj
0 -28.4801 Td
(4050 // Truncate inode \(discard contents\).) 183.4776 Tj
0 -37.9735 Td
-(4051 static void) 69.8962 Tj
+(4051 // Only called after the last dirent referring) 222.7942 Tj
0 -47.4668 Td
-(4052 itrunc\(struct inode *ip\)) 126.6869 Tj
+(4052 // to this inode has been erased on disk.) 200.9517 Tj
0 -56.9602 Td
-(4053 {) 26.2111 Tj
+(4053 static void) 69.8962 Tj
0 -66.4535 Td
-(4054 int i, j;) 69.8962 Tj
+(4054 itrunc\(struct inode *ip\)) 126.6869 Tj
0 -75.9469 Td
-(4055 struct buf *bp;) 96.1073 Tj
+(4055 {) 26.2111 Tj
0 -85.4403 Td
-(4056 uint *a;) 65.5277 Tj
+(4056 int i, j;) 69.8962 Tj
0 -94.9336 Td
-(4057 ) 21.8426 Tj
+(4057 struct buf *bp;) 96.1073 Tj
0 -104.427 Td
-(4058 for\(i = 0; i < NDIRECT; i++\){) 157.2665 Tj
+(4058 uint *a;) 65.5277 Tj
0 -113.9203 Td
-(4059 if\(ip->addrs[i]\){) 113.5814 Tj
+(4059 ) 21.8426 Tj
0 -123.4137 Td
-(4060 bfree\(ip->dev, ip->addrs[i]\);) 174.7406 Tj
+(4060 for\(i = 0; i < NDIRECT; i++\){) 157.2665 Tj
0 -132.9071 Td
-(4061 ip->addrs[i] = 0;) 122.3184 Tj
+(4061 if\(ip->addrs[i]\){) 113.5814 Tj
0 -142.4004 Td
-(4062 }) 43.6851 Tj
+(4062 bfree\(ip->dev, ip->addrs[i]\);) 174.7406 Tj
0 -151.8938 Td
-(4063 }) 34.9481 Tj
+(4063 ip->addrs[i] = 0;) 122.3184 Tj
0 -161.3871 Td
-(4064 ) 21.8426 Tj
+(4064 }) 43.6851 Tj
0 -170.8805 Td
-(4065 if\(ip->addrs[INDIRECT]\){) 135.4239 Tj
+(4065 }) 34.9481 Tj
0 -180.3739 Td
-(4066 bp = bread\(ip->dev, ip->addrs[INDIRECT]\);) 218.4257 Tj
+(4066 ) 21.8426 Tj
0 -189.8672 Td
-(4067 a = \(uint*\)bp->data;) 126.6869 Tj
+(4067 if\(ip->addrs[NDIRECT]\){) 131.0554 Tj
0 -199.3606 Td
-(4068 for\(j = 0; j < NINDIRECT; j++\){) 174.7406 Tj
+(4068 bp = bread\(ip->dev, ip->addrs[NDIRECT]\);) 214.0572 Tj
0 -208.8539 Td
-(4069 if\(a[j]\)) 83.0018 Tj
+(4069 a = \(uint*\)bp->data;) 126.6869 Tj
0 -218.3473 Td
-(4070 bfree\(ip->dev, a[j]\);) 148.5295 Tj
+(4070 for\(j = 0; j < NINDIRECT; j++\){) 174.7406 Tj
0 -227.8407 Td
-(4071 }) 43.6851 Tj
+(4071 if\(a[j]\)) 83.0018 Tj
0 -237.334 Td
-(4072 brelse\(bp\);) 87.3703 Tj
+(4072 bfree\(ip->dev, a[j]\);) 148.5295 Tj
0 -246.8274 Td
-(4073 ip->addrs[INDIRECT] = 0;) 144.161 Tj
+(4073 }) 43.6851 Tj
0 -256.3207 Td
-(4074 }) 34.9481 Tj
+(4074 brelse\(bp\);) 87.3703 Tj
0 -265.8141 Td
-(4075 ) 21.8426 Tj
+(4075 bfree\(ip->dev, ip->addrs[NDIRECT]\);) 192.2146 Tj
0 -275.3075 Td
-(4076 ip->size = 0;) 87.3703 Tj
+(4076 ip->addrs[NDIRECT] = 0;) 139.7925 Tj
0 -284.8008 Td
-(4077 iupdate\(ip\);) 83.0018 Tj
+(4077 }) 34.9481 Tj
0 -294.2942 Td
-(4078 }) 26.2111 Tj
+(4078 ) 21.8426 Tj
0 -303.7875 Td
-(4079 ) 21.8426 Tj
+(4079 ip->size = 0;) 87.3703 Tj
0 -313.2809 Td
-(4080 // Copy stat information from inode.) 179.1091 Tj
+(4080 iupdate\(ip\);) 83.0018 Tj
0 -322.7743 Td
-(4081 void) 39.3166 Tj
+(4081 }) 26.2111 Tj
0 -332.2676 Td
-(4082 stati\(struct inode *ip, struct stat *st\)) 196.5831 Tj
+(4082 ) 21.8426 Tj
0 -341.761 Td
-(4083 {) 26.2111 Tj
+(4083 // Copy stat information from inode.) 179.1091 Tj
0 -351.2543 Td
-(4084 st->dev = ip->dev;) 109.2129 Tj
+(4084 void) 39.3166 Tj
0 -360.7477 Td
-(4085 st->ino = ip->inum;) 113.5814 Tj
+(4085 stati\(struct inode *ip, struct stat *st\)) 196.5831 Tj
0 -370.2411 Td
-(4086 st->type = ip->type;) 117.9499 Tj
+(4086 {) 26.2111 Tj
0 -379.7344 Td
-(4087 st->nlink = ip->nlink;) 126.6869 Tj
+(4087 st->dev = ip->dev;) 109.2129 Tj
0 -389.2278 Td
-(4088 st->size = ip->size;) 117.9499 Tj
+(4088 st->ino = ip->inum;) 113.5814 Tj
0 -398.7211 Td
-(4089 }) 26.2111 Tj
+(4089 st->type = ip->type;) 117.9499 Tj
0 -408.2145 Td
-(4090 ) 21.8426 Tj
+(4090 st->nlink = ip->nlink;) 126.6869 Tj
0 -417.7079 Td
-(4091 ) 21.8426 Tj
+(4091 st->size = ip->size;) 117.9499 Tj
0 -427.2012 Td
-(4092 ) 21.8426 Tj
+(4092 }) 26.2111 Tj
0 -436.6946 Td
(4093 ) 21.8426 Tj
0 -446.1879 Td
@@ -14783,6 +14898,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -14800,7 +14917,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 10) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 10) 157.2665 Tj
0 -28.4801 Td
(4100 // Read data from inode.) 126.6869 Tj
0 -37.9735 Td
@@ -14841,7 +14958,7 @@ ajor].read\)) 318.9016 Tj
0 -199.3606 Td
(4118 for\(tot=0; tot<n; tot+=m, off+=m, dst+=m\){) 214.0572 Tj
0 -208.8539 Td
-(4119 bp = bread\(ip->dev, bmap\(ip, off/BSIZE, 0\)\);) 231.5313 Tj
+(4119 bp = bread\(ip->dev, bmap\(ip, off/BSIZE\)\);) 218.4257 Tj
0 -218.3473 Td
(4120 m = min\(n - tot, BSIZE - off%BSIZE\);) 196.5831 Tj
0 -227.8407 Td
@@ -14920,7 +15037,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 11) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 11) 157.2665 Tj
0 -28.4801 Td
(4150 // Write data to inode.) 122.3184 Tj
0 -37.9735 Td
@@ -14949,7 +15066,7 @@ ajor].write\)) 323.2701 Tj
0 -142.4004 Td
(4162 ) 21.8426 Tj
0 -151.8938 Td
-(4163 if\(off + n < off\)) 104.8443 Tj
+(4163 if\(off > ip->size || off + n < off\)) 183.4776 Tj
0 -161.3871 Td
(4164 return -1;) 83.0018 Tj
0 -170.8805 Td
@@ -14961,7 +15078,7 @@ ajor].write\)) 323.2701 Tj
0 -199.3606 Td
(4168 for\(tot=0; tot<n; tot+=m, off+=m, src+=m\){) 214.0572 Tj
0 -208.8539 Td
-(4169 bp = bread\(ip->dev, bmap\(ip, off/BSIZE, 1\)\);) 231.5313 Tj
+(4169 bp = bread\(ip->dev, bmap\(ip, off/BSIZE\)\);) 218.4257 Tj
0 -218.3473 Td
(4170 m = min\(n - tot, BSIZE - off%BSIZE\);) 196.5831 Tj
0 -227.8407 Td
@@ -15052,6 +15169,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -15069,7 +15188,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 12) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 12) 157.2665 Tj
0 -28.4801 Td
(4200 // Directories) 83.0018 Tj
0 -37.9735 Td
@@ -15115,7 +15234,7 @@ q
0 -227.8407 Td
(4221 for\(off = 0; off < dp->size; off += BSIZE\){) 218.4257 Tj
0 -237.334 Td
-(4222 bp = bread\(dp->dev, bmap\(dp, off / BSIZE, 0\)\);) 240.2683 Tj
+(4222 bp = bread\(dp->dev, bmap\(dp, off / BSIZE\)\);) 227.1628 Tj
0 -246.8274 Td
(4223 for\(de = \(struct dirent*\)bp->data;) 187.8461 Tj
0 -256.3207 Td
@@ -15188,14 +15307,14 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 13) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 13) 157.2665 Tj
0 -28.4801 Td
-(4250 // Write a new directory entry \(name, ino\) into the dire\
-ctory dp.) 305.796 Tj
+(4250 // Write a new directory entry \(name, inum\) into the dir\
+ectory dp.) 310.1645 Tj
0 -37.9735 Td
(4251 int) 34.9481 Tj
0 -47.4668 Td
-(4252 dirlink\(struct inode *dp, char *name, uint ino\)) 227.1628 Tj
+(4252 dirlink\(struct inode *dp, char *name, uint inum\)) 231.5313 Tj
0 -56.9602 Td
(4253 {) 26.2111 Tj
0 -66.4535 Td
@@ -15238,7 +15357,7 @@ zeof\(de\)\)) 283.9534 Tj
0 -237.334 Td
(4272 strncpy\(de.name, name, DIRSIZ\);) 166.0035 Tj
0 -246.8274 Td
-(4273 de.inum = ino;) 91.7388 Tj
+(4273 de.inum = inum;) 96.1073 Tj
0 -256.3207 Td
(4274 if\(writei\(dp, \(char*\)&de, off, sizeof\(de\)\) != siz\
eof\(de\)\)) 279.5849 Tj
@@ -15322,6 +15441,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -15339,7 +15460,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 14) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 14) 157.2665 Tj
0 -28.4801 Td
(4300 // Paths) 56.7907 Tj
0 -37.9735 Td
@@ -15367,59 +15488,59 @@ a") 275.2164 Tj
(4310 // skipelem\("///a//bb", name\) = "bb", setting name = "\
a") 275.2164 Tj
0 -132.9071 Td
-(4311 // skipelem\("", name\) = skipelem\("////", name\) = 0) 249.0053 Tj
+(4311 // skipelem\("a", name\) = "", setting name = "a") 235.8998 Tj
0 -142.4004 Td
-(4312 //) 30.5796 Tj
+(4312 // skipelem\("", name\) = skipelem\("////", name\) = 0) 249.0053 Tj
0 -151.8938 Td
-(4313 static char*) 74.2647 Tj
+(4313 //) 30.5796 Tj
0 -161.3871 Td
-(4314 skipelem\(char *path, char *name\)) 161.635 Tj
+(4314 static char*) 74.2647 Tj
0 -170.8805 Td
-(4315 {) 26.2111 Tj
+(4315 skipelem\(char *path, char *name\)) 161.635 Tj
0 -180.3739 Td
-(4316 char *s;) 65.5277 Tj
+(4316 {) 26.2111 Tj
0 -189.8672 Td
-(4317 int len;) 65.5277 Tj
+(4317 char *s;) 65.5277 Tj
0 -199.3606 Td
-(4318 ) 21.8426 Tj
+(4318 int len;) 65.5277 Tj
0 -208.8539 Td
-(4319 while\(*path == '/'\)) 113.5814 Tj
+(4319 ) 21.8426 Tj
0 -218.3473 Td
-(4320 path++;) 69.8962 Tj
+(4320 while\(*path == '/'\)) 113.5814 Tj
0 -227.8407 Td
-(4321 if\(*path == 0\)) 91.7388 Tj
+(4321 path++;) 69.8962 Tj
0 -237.334 Td
-(4322 return 0;) 78.6333 Tj
+(4322 if\(*path == 0\)) 91.7388 Tj
0 -246.8274 Td
-(4323 s = path;) 69.8962 Tj
+(4323 return 0;) 78.6333 Tj
0 -256.3207 Td
-(4324 while\(*path != '/' && *path != 0\)) 174.7406 Tj
+(4324 s = path;) 69.8962 Tj
0 -265.8141 Td
-(4325 path++;) 69.8962 Tj
+(4325 while\(*path != '/' && *path != 0\)) 174.7406 Tj
0 -275.3075 Td
-(4326 len = path - s;) 96.1073 Tj
+(4326 path++;) 69.8962 Tj
0 -284.8008 Td
-(4327 if\(len >= DIRSIZ\)) 104.8443 Tj
+(4327 len = path - s;) 96.1073 Tj
0 -294.2942 Td
-(4328 memmove\(name, s, DIRSIZ\);) 148.5295 Tj
+(4328 if\(len >= DIRSIZ\)) 104.8443 Tj
0 -303.7875 Td
-(4329 else {) 56.7907 Tj
+(4329 memmove\(name, s, DIRSIZ\);) 148.5295 Tj
0 -313.2809 Td
-(4330 memmove\(name, s, len\);) 135.4239 Tj
+(4330 else {) 56.7907 Tj
0 -322.7743 Td
-(4331 name[len] = 0;) 100.4758 Tj
+(4331 memmove\(name, s, len\);) 135.4239 Tj
0 -332.2676 Td
-(4332 }) 34.9481 Tj
+(4332 name[len] = 0;) 100.4758 Tj
0 -341.761 Td
-(4333 while\(*path == '/'\)) 113.5814 Tj
+(4333 }) 34.9481 Tj
0 -351.2543 Td
-(4334 path++;) 69.8962 Tj
+(4334 while\(*path == '/'\)) 113.5814 Tj
0 -360.7477 Td
-(4335 return path;) 83.0018 Tj
+(4335 path++;) 69.8962 Tj
0 -370.2411 Td
-(4336 }) 26.2111 Tj
+(4336 return path;) 83.0018 Tj
0 -379.7344 Td
-(4337 ) 21.8426 Tj
+(4337 }) 26.2111 Tj
0 -389.2278 Td
(4338 ) 21.8426 Tj
0 -398.7211 Td
@@ -15462,7 +15583,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/fs.c Page 15) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/fs.c Page 15) 157.2665 Tj
0 -28.4801 Td
(4350 // Look up and return the inode for a path name.) 231.5313 Tj
0 -37.9735 Td
@@ -15474,7 +15595,7 @@ y the final) 323.2701 Tj
0 -56.9602 Td
(4353 static struct inode*) 109.2129 Tj
0 -66.4535 Td
-(4354 _namei\(char *path, int parent, char *name\)) 205.3202 Tj
+(4354 namex\(char *path, int nameiparent, char *name\)) 222.7942 Tj
0 -75.9469 Td
(4355 {) 26.2111 Tj
0 -85.4403 Td
@@ -15484,7 +15605,7 @@ y the final) 323.2701 Tj
0 -104.427 Td
(4358 if\(*path == '/'\)) 100.4758 Tj
0 -113.9203 Td
-(4359 ip = iget\(ROOTDEV, 1\);) 135.4239 Tj
+(4359 ip = iget\(ROOTDEV, ROOTINO\);) 161.635 Tj
0 -123.4137 Td
(4360 else) 48.0537 Tj
0 -132.9071 Td
@@ -15504,7 +15625,7 @@ y the final) 323.2701 Tj
0 -199.3606 Td
(4368 }) 43.6851 Tj
0 -208.8539 Td
-(4369 if\(parent && *path == '\\0'\){) 161.635 Tj
+(4369 if\(nameiparent && *path == '\\0'\){) 183.4776 Tj
0 -218.3473 Td
(4370 // Stop one level early.) 152.898 Tj
0 -227.8407 Td
@@ -15528,7 +15649,7 @@ y the final) 323.2701 Tj
0 -313.2809 Td
(4380 }) 34.9481 Tj
0 -322.7743 Td
-(4381 if\(parent\){) 78.6333 Tj
+(4381 if\(nameiparent\){) 100.4758 Tj
0 -332.2676 Td
(4382 iput\(ip\);) 78.6333 Tj
0 -341.761 Td
@@ -15550,7 +15671,7 @@ y the final) 323.2701 Tj
0 -417.7079 Td
(4391 char name[DIRSIZ];) 109.2129 Tj
0 -427.2012 Td
-(4392 return _namei\(path, 0, name\);) 157.2665 Tj
+(4392 return namex\(path, 0, name\);) 152.898 Tj
0 -436.6946 Td
(4393 }) 26.2111 Tj
0 -446.1879 Td
@@ -15562,7 +15683,7 @@ y the final) 323.2701 Tj
0 -474.668 Td
(4397 {) 26.2111 Tj
0 -484.1614 Td
-(4398 return _namei\(path, 1, name\);) 157.2665 Tj
+(4398 return namex\(path, 1, name\);) 152.898 Tj
0 -493.6547 Td
(4399 }) 26.2111 Tj
0 -522.1348 Td
@@ -15595,6 +15716,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -15612,7 +15735,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/file.c Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/file.c Page 1) 161.635 Tj
0 -28.4801 Td
(4400 #include "types.h") 100.4758 Tj
0 -37.9735 Td
@@ -15624,61 +15747,61 @@ q
0 -66.4535 Td
(4404 #include "spinlock.h") 113.5814 Tj
0 -75.9469 Td
-(4405 #include "dev.h") 91.7388 Tj
+(4405 ) 21.8426 Tj
0 -85.4403 Td
-(4406 ) 21.8426 Tj
+(4406 struct devsw devsw[NDEV];) 131.0554 Tj
0 -94.9336 Td
-(4407 struct devsw devsw[NDEV];) 131.0554 Tj
+(4407 struct {) 56.7907 Tj
0 -104.427 Td
-(4408 struct spinlock file_table_lock;) 161.635 Tj
+(4408 struct spinlock lock;) 122.3184 Tj
0 -113.9203 Td
-(4409 struct file file[NFILE];) 126.6869 Tj
+(4409 struct file file[NFILE];) 135.4239 Tj
0 -123.4137 Td
-(4410 ) 21.8426 Tj
+(4410 } ftable;) 61.1592 Tj
0 -132.9071 Td
-(4411 void) 39.3166 Tj
+(4411 ) 21.8426 Tj
0 -142.4004 Td
-(4412 fileinit\(void\)) 83.0018 Tj
+(4412 void) 39.3166 Tj
0 -151.8938 Td
-(4413 {) 26.2111 Tj
+(4413 fileinit\(void\)) 83.0018 Tj
0 -161.3871 Td
-(4414 initlock\(&file_table_lock, "file_table"\);) 209.6887 Tj
+(4414 {) 26.2111 Tj
0 -170.8805 Td
-(4415 }) 26.2111 Tj
+(4415 initlock\(&ftable.lock, "ftable"\);) 174.7406 Tj
0 -180.3739 Td
-(4416 ) 21.8426 Tj
+(4416 }) 26.2111 Tj
0 -189.8672 Td
-(4417 // Allocate a file structure.) 148.5295 Tj
+(4417 ) 21.8426 Tj
0 -199.3606 Td
-(4418 struct file*) 74.2647 Tj
+(4418 // Allocate a file structure.) 148.5295 Tj
0 -208.8539 Td
-(4419 filealloc\(void\)) 87.3703 Tj
+(4419 struct file*) 74.2647 Tj
0 -218.3473 Td
-(4420 {) 26.2111 Tj
+(4420 filealloc\(void\)) 87.3703 Tj
0 -227.8407 Td
-(4421 int i;) 56.7907 Tj
+(4421 {) 26.2111 Tj
0 -237.334 Td
-(4422 ) 21.8426 Tj
+(4422 struct file *f;) 96.1073 Tj
0 -246.8274 Td
-(4423 acquire\(&file_table_lock\);) 144.161 Tj
+(4423 ) 21.8426 Tj
0 -256.3207 Td
-(4424 for\(i = 0; i < NFILE; i++\){) 148.5295 Tj
+(4424 acquire\(&ftable.lock\);) 126.6869 Tj
0 -265.8141 Td
-(4425 if\(file[i].type == FD_CLOSED\){) 170.3721 Tj
+(4425 for\(f = ftable.file; f < ftable.file + NFILE; f++\){) 253.3738 Tj
0 -275.3075 Td
-(4426 file[i].type = FD_NONE;) 148.5295 Tj
+(4426 if\(f->ref == 0\){) 109.2129 Tj
0 -284.8008 Td
-(4427 file[i].ref = 1;) 117.9499 Tj
+(4427 f->ref = 1;) 96.1073 Tj
0 -294.2942 Td
-(4428 release\(&file_table_lock\);) 161.635 Tj
+(4428 release\(&ftable.lock\);) 144.161 Tj
0 -303.7875 Td
-(4429 return file + i;) 117.9499 Tj
+(4429 return f;) 87.3703 Tj
0 -313.2809 Td
(4430 }) 43.6851 Tj
0 -322.7743 Td
(4431 }) 34.9481 Tj
0 -332.2676 Td
-(4432 release\(&file_table_lock\);) 144.161 Tj
+(4432 release\(&ftable.lock\);) 126.6869 Tj
0 -341.761 Td
(4433 return 0;) 69.8962 Tj
0 -351.2543 Td
@@ -15694,15 +15817,15 @@ q
0 -398.7211 Td
(4439 {) 26.2111 Tj
0 -408.2145 Td
-(4440 acquire\(&file_table_lock\);) 144.161 Tj
+(4440 acquire\(&ftable.lock\);) 126.6869 Tj
0 -417.7079 Td
-(4441 if\(f->ref < 1 || f->type == FD_CLOSED\)) 196.5831 Tj
+(4441 if\(f->ref < 1\)) 91.7388 Tj
0 -427.2012 Td
(4442 panic\("filedup"\);) 113.5814 Tj
0 -436.6946 Td
(4443 f->ref++;) 69.8962 Tj
0 -446.1879 Td
-(4444 release\(&file_table_lock\);) 144.161 Tj
+(4444 release\(&ftable.lock\);) 126.6869 Tj
0 -455.6813 Td
(4445 return f;) 69.8962 Tj
0 -465.1747 Td
@@ -15731,7 +15854,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/file.c Page 2) 161.635 Tj
+(Aug 8 01:04 2009 xv6/file.c Page 2) 161.635 Tj
0 -28.4801 Td
(4450 // Close file f. \(Decrement ref count, close when reache\
s 0.\)) 292.6905 Tj
@@ -15746,15 +15869,15 @@ s 0.\)) 292.6905 Tj
0 -75.9469 Td
(4455 ) 21.8426 Tj
0 -85.4403 Td
-(4456 acquire\(&file_table_lock\);) 144.161 Tj
+(4456 acquire\(&ftable.lock\);) 126.6869 Tj
0 -94.9336 Td
-(4457 if\(f->ref < 1 || f->type == FD_CLOSED\)) 196.5831 Tj
+(4457 if\(f->ref < 1\)) 91.7388 Tj
0 -104.427 Td
(4458 panic\("fileclose"\);) 122.3184 Tj
0 -113.9203 Td
(4459 if\(--f->ref > 0\){) 104.8443 Tj
0 -123.4137 Td
-(4460 release\(&file_table_lock\);) 152.898 Tj
+(4460 release\(&ftable.lock\);) 135.4239 Tj
0 -132.9071 Td
(4461 return;) 69.8962 Tj
0 -142.4004 Td
@@ -15764,9 +15887,9 @@ s 0.\)) 292.6905 Tj
0 -161.3871 Td
(4464 f->ref = 0;) 78.6333 Tj
0 -170.8805 Td
-(4465 f->type = FD_CLOSED;) 117.9499 Tj
+(4465 f->type = FD_NONE;) 109.2129 Tj
0 -180.3739 Td
-(4466 release\(&file_table_lock\);) 144.161 Tj
+(4466 release\(&ftable.lock\);) 126.6869 Tj
0 -189.8672 Td
(4467 ) 21.8426 Tj
0 -199.3606 Td
@@ -15778,37 +15901,37 @@ s 0.\)) 292.6905 Tj
0 -227.8407 Td
(4471 iput\(ff.ip\);) 91.7388 Tj
0 -237.334 Td
-(4472 else) 48.0537 Tj
+(4472 }) 26.2111 Tj
0 -246.8274 Td
-(4473 panic\("fileclose"\);) 122.3184 Tj
+(4473 ) 21.8426 Tj
0 -256.3207 Td
-(4474 }) 26.2111 Tj
+(4474 // Get metadata about file f.) 148.5295 Tj
0 -265.8141 Td
-(4475 ) 21.8426 Tj
+(4475 int) 34.9481 Tj
0 -275.3075 Td
-(4476 // Get metadata about file f.) 148.5295 Tj
+(4476 filestat\(struct file *f, struct stat *st\)) 200.9517 Tj
0 -284.8008 Td
-(4477 int) 34.9481 Tj
+(4477 {) 26.2111 Tj
0 -294.2942 Td
-(4478 filestat\(struct file *f, struct stat *st\)) 200.9517 Tj
+(4478 if\(f->type == FD_INODE\){) 135.4239 Tj
0 -303.7875 Td
-(4479 {) 26.2111 Tj
+(4479 ilock\(f->ip\);) 96.1073 Tj
0 -313.2809 Td
-(4480 if\(f->type == FD_INODE\){) 135.4239 Tj
+(4480 stati\(f->ip, st\);) 113.5814 Tj
0 -322.7743 Td
-(4481 ilock\(f->ip\);) 96.1073 Tj
+(4481 iunlock\(f->ip\);) 104.8443 Tj
0 -332.2676 Td
-(4482 stati\(f->ip, st\);) 113.5814 Tj
+(4482 return 0;) 78.6333 Tj
0 -341.761 Td
-(4483 iunlock\(f->ip\);) 104.8443 Tj
+(4483 }) 34.9481 Tj
0 -351.2543 Td
-(4484 return 0;) 78.6333 Tj
+(4484 return -1;) 74.2647 Tj
0 -360.7477 Td
-(4485 }) 34.9481 Tj
+(4485 }) 26.2111 Tj
0 -370.2411 Td
-(4486 return -1;) 74.2647 Tj
+(4486 ) 21.8426 Tj
0 -379.7344 Td
-(4487 }) 26.2111 Tj
+(4487 ) 21.8426 Tj
0 -389.2278 Td
(4488 ) 21.8426 Tj
0 -398.7211 Td
@@ -15863,6 +15986,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -15880,7 +16005,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/file.c Page 3) 161.635 Tj
+(Aug 8 01:04 2009 xv6/file.c Page 3) 161.635 Tj
0 -28.4801 Td
(4500 // Read from file f. Addr is kernel address.) 218.4257 Tj
0 -37.9735 Td
@@ -15999,7 +16124,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysfile.c Page 1) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/sysfile.c Page 1) 174.7406 Tj
0 -28.4801 Td
(4550 #include "types.h") 100.4758 Tj
0 -37.9735 Td
@@ -16015,83 +16140,83 @@ q
0 -85.4403 Td
(4556 #include "fs.h") 87.3703 Tj
0 -94.9336 Td
-(4557 #include "fsvar.h") 100.4758 Tj
+(4557 #include "file.h") 96.1073 Tj
0 -104.427 Td
-(4558 #include "file.h") 96.1073 Tj
+(4558 #include "fcntl.h") 100.4758 Tj
0 -113.9203 Td
-(4559 #include "fcntl.h") 100.4758 Tj
+(4559 ) 21.8426 Tj
0 -123.4137 Td
-(4560 ) 21.8426 Tj
-0 -132.9071 Td
-(4561 // Fetch the nth word-sized system call argument as a file\
+(4560 // Fetch the nth word-sized system call argument as a file\
descriptor) 323.2701 Tj
-0 -142.4004 Td
-(4562 // and return both the descriptor and the corresponding st\
+0 -132.9071 Td
+(4561 // and return both the descriptor and the corresponding st\
ruct file.) 318.9016 Tj
+0 -142.4004 Td
+(4562 static int) 65.5277 Tj
0 -151.8938 Td
-(4563 static int) 65.5277 Tj
+(4563 argfd\(int n, int *pfd, struct file **pf\)) 196.5831 Tj
0 -161.3871 Td
-(4564 argfd\(int n, int *pfd, struct file **pf\)) 196.5831 Tj
+(4564 {) 26.2111 Tj
0 -170.8805 Td
-(4565 {) 26.2111 Tj
+(4565 int fd;) 61.1592 Tj
0 -180.3739 Td
-(4566 int fd;) 61.1592 Tj
+(4566 struct file *f;) 96.1073 Tj
0 -189.8672 Td
-(4567 struct file *f;) 96.1073 Tj
+(4567 ) 21.8426 Tj
0 -199.3606 Td
-(4568 ) 21.8426 Tj
+(4568 if\(argint\(n, &fd\) < 0\)) 126.6869 Tj
0 -208.8539 Td
-(4569 if\(argint\(n, &fd\) < 0\)) 126.6869 Tj
+(4569 return -1;) 83.0018 Tj
0 -218.3473 Td
-(4570 return -1;) 83.0018 Tj
+(4570 if\(fd < 0 || fd >= NOFILE || \(f=cp->ofile[fd]\) == 0\)) 257.7424 Tj
0 -227.8407 Td
-(4571 if\(fd < 0 || fd >= NOFILE || \(f=cp->ofile[fd]\) == 0\)) 257.7424 Tj
+(4571 return -1;) 83.0018 Tj
0 -237.334 Td
-(4572 return -1;) 83.0018 Tj
+(4572 if\(pfd\)) 61.1592 Tj
0 -246.8274 Td
-(4573 if\(pfd\)) 61.1592 Tj
+(4573 *pfd = fd;) 83.0018 Tj
0 -256.3207 Td
-(4574 *pfd = fd;) 83.0018 Tj
+(4574 if\(pf\)) 56.7907 Tj
0 -265.8141 Td
-(4575 if\(pf\)) 56.7907 Tj
+(4575 *pf = f;) 74.2647 Tj
0 -275.3075 Td
-(4576 *pf = f;) 74.2647 Tj
+(4576 return 0;) 69.8962 Tj
0 -284.8008 Td
-(4577 return 0;) 69.8962 Tj
+(4577 }) 26.2111 Tj
0 -294.2942 Td
-(4578 }) 26.2111 Tj
+(4578 ) 21.8426 Tj
0 -303.7875 Td
-(4579 ) 21.8426 Tj
+(4579 // Allocate a file descriptor for the given file.) 235.8998 Tj
0 -313.2809 Td
-(4580 // Allocate a file descriptor for the given file.) 235.8998 Tj
+(4580 // Takes over file reference from caller on success.) 249.0053 Tj
0 -322.7743 Td
-(4581 // Takes over file reference from caller on success.) 249.0053 Tj
+(4581 static int) 65.5277 Tj
0 -332.2676 Td
-(4582 static int) 65.5277 Tj
+(4582 fdalloc\(struct file *f\)) 122.3184 Tj
0 -341.761 Td
-(4583 fdalloc\(struct file *f\)) 122.3184 Tj
+(4583 {) 26.2111 Tj
0 -351.2543 Td
-(4584 {) 26.2111 Tj
+(4584 int fd;) 61.1592 Tj
0 -360.7477 Td
-(4585 int fd;) 61.1592 Tj
+(4585 ) 21.8426 Tj
0 -370.2411 Td
-(4586 ) 21.8426 Tj
+(4586 for\(fd = 0; fd < NOFILE; fd++\){) 166.0035 Tj
0 -379.7344 Td
-(4587 for\(fd = 0; fd < NOFILE; fd++\){) 166.0035 Tj
+(4587 if\(cp->ofile[fd] == 0\){) 139.7925 Tj
0 -389.2278 Td
-(4588 if\(cp->ofile[fd] == 0\){) 139.7925 Tj
+(4588 cp->ofile[fd] = f;) 126.6869 Tj
0 -398.7211 Td
-(4589 cp->ofile[fd] = f;) 126.6869 Tj
+(4589 return fd;) 91.7388 Tj
0 -408.2145 Td
-(4590 return fd;) 91.7388 Tj
+(4590 }) 43.6851 Tj
0 -417.7079 Td
-(4591 }) 43.6851 Tj
+(4591 }) 34.9481 Tj
0 -427.2012 Td
-(4592 }) 34.9481 Tj
+(4592 return -1;) 74.2647 Tj
0 -436.6946 Td
-(4593 return -1;) 74.2647 Tj
+(4593 }) 26.2111 Tj
0 -446.1879 Td
-(4594 }) 26.2111 Tj
+(4594 ) 21.8426 Tj
0 -455.6813 Td
(4595 ) 21.8426 Tj
0 -465.1747 Td
@@ -16132,6 +16257,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -16149,81 +16276,81 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysfile.c Page 2) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/sysfile.c Page 2) 174.7406 Tj
0 -28.4801 Td
(4600 int) 34.9481 Tj
0 -37.9735 Td
-(4601 sys_read\(void\)) 83.0018 Tj
+(4601 sys_dup\(void\)) 78.6333 Tj
0 -47.4668 Td
(4602 {) 26.2111 Tj
0 -56.9602 Td
(4603 struct file *f;) 96.1073 Tj
0 -66.4535 Td
-(4604 int n;) 56.7907 Tj
+(4604 int fd;) 61.1592 Tj
0 -75.9469 Td
-(4605 char *p;) 65.5277 Tj
+(4605 ) 21.8426 Tj
0 -85.4403 Td
-(4606 ) 21.8426 Tj
+(4606 if\(argfd\(0, 0, &f\) < 0\)) 131.0554 Tj
0 -94.9336 Td
-(4607 if\(argfd\(0, 0, &f\) < 0 || argint\(2, &n\) < 0 || argp\
-tr\(1, &p, n\) < 0\)) 327.6386 Tj
+(4607 return -1;) 83.0018 Tj
0 -104.427 Td
-(4608 return -1;) 83.0018 Tj
+(4608 if\(\(fd=fdalloc\(f\)\) < 0\)) 131.0554 Tj
0 -113.9203 Td
-(4609 return fileread\(f, p, n\);) 139.7925 Tj
+(4609 return -1;) 83.0018 Tj
0 -123.4137 Td
-(4610 }) 26.2111 Tj
+(4610 filedup\(f\);) 78.6333 Tj
0 -132.9071 Td
-(4611 ) 21.8426 Tj
+(4611 return fd;) 74.2647 Tj
0 -142.4004 Td
-(4612 int) 34.9481 Tj
+(4612 }) 26.2111 Tj
0 -151.8938 Td
-(4613 sys_write\(void\)) 87.3703 Tj
+(4613 ) 21.8426 Tj
0 -161.3871 Td
-(4614 {) 26.2111 Tj
+(4614 int) 34.9481 Tj
0 -170.8805 Td
-(4615 struct file *f;) 96.1073 Tj
+(4615 sys_read\(void\)) 83.0018 Tj
0 -180.3739 Td
-(4616 int n;) 56.7907 Tj
+(4616 {) 26.2111 Tj
0 -189.8672 Td
-(4617 char *p;) 65.5277 Tj
+(4617 struct file *f;) 96.1073 Tj
0 -199.3606 Td
-(4618 ) 21.8426 Tj
+(4618 int n;) 56.7907 Tj
0 -208.8539 Td
-(4619 if\(argfd\(0, 0, &f\) < 0 || argint\(2, &n\) < 0 || argp\
-tr\(1, &p, n\) < 0\)) 327.6386 Tj
+(4619 char *p;) 65.5277 Tj
0 -218.3473 Td
-(4620 return -1;) 83.0018 Tj
+(4620 ) 21.8426 Tj
0 -227.8407 Td
-(4621 return filewrite\(f, p, n\);) 144.161 Tj
+(4621 if\(argfd\(0, 0, &f\) < 0 || argint\(2, &n\) < 0 || argp\
+tr\(1, &p, n\) < 0\)) 327.6386 Tj
0 -237.334 Td
-(4622 }) 26.2111 Tj
+(4622 return -1;) 83.0018 Tj
0 -246.8274 Td
-(4623 ) 21.8426 Tj
+(4623 return fileread\(f, p, n\);) 139.7925 Tj
0 -256.3207 Td
-(4624 int) 34.9481 Tj
+(4624 }) 26.2111 Tj
0 -265.8141 Td
-(4625 sys_dup\(void\)) 78.6333 Tj
+(4625 ) 21.8426 Tj
0 -275.3075 Td
-(4626 {) 26.2111 Tj
+(4626 int) 34.9481 Tj
0 -284.8008 Td
-(4627 struct file *f;) 96.1073 Tj
+(4627 sys_write\(void\)) 87.3703 Tj
0 -294.2942 Td
-(4628 int fd;) 61.1592 Tj
+(4628 {) 26.2111 Tj
0 -303.7875 Td
-(4629 ) 21.8426 Tj
+(4629 struct file *f;) 96.1073 Tj
0 -313.2809 Td
-(4630 if\(argfd\(0, 0, &f\) < 0\)) 131.0554 Tj
+(4630 int n;) 56.7907 Tj
0 -322.7743 Td
-(4631 return -1;) 83.0018 Tj
+(4631 char *p;) 65.5277 Tj
0 -332.2676 Td
-(4632 if\(\(fd=fdalloc\(f\)\) < 0\)) 131.0554 Tj
+(4632 ) 21.8426 Tj
0 -341.761 Td
-(4633 return -1;) 83.0018 Tj
+(4633 if\(argfd\(0, 0, &f\) < 0 || argint\(2, &n\) < 0 || argp\
+tr\(1, &p, n\) < 0\)) 327.6386 Tj
0 -351.2543 Td
-(4634 filedup\(f\);) 78.6333 Tj
+(4634 return -1;) 83.0018 Tj
0 -360.7477 Td
-(4635 return fd;) 74.2647 Tj
+(4635 return filewrite\(f, p, n\);) 144.161 Tj
0 -370.2411 Td
(4636 }) 26.2111 Tj
0 -379.7344 Td
@@ -16270,7 +16397,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysfile.c Page 3) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/sysfile.c Page 3) 174.7406 Tj
0 -28.4801 Td
(4650 int) 34.9481 Tj
0 -37.9735 Td
@@ -16337,28 +16464,28 @@ zeof\(*st\)\) < 0\)) 314.533 Tj
0 -322.7743 Td
(4681 if\(\(dp = nameiparent\(new, name\)\) == 0\)) 196.5831 Tj
0 -332.2676 Td
-(4682 goto bad;) 83.0018 Tj
+(4682 goto bad;) 78.6333 Tj
0 -341.761 Td
(4683 ilock\(dp\);) 74.2647 Tj
0 -351.2543 Td
(4684 if\(dp->dev != ip->dev || dirlink\(dp, name, ip->inum\) \
-< 0\)) 279.5849 Tj
+< 0\){) 283.9534 Tj
0 -360.7477 Td
-(4685 goto bad;) 78.6333 Tj
+(4685 iunlockput\(dp\);) 104.8443 Tj
0 -370.2411 Td
-(4686 iunlockput\(dp\);) 96.1073 Tj
+(4686 goto bad;) 78.6333 Tj
0 -379.7344 Td
-(4687 iput\(ip\);) 69.8962 Tj
+(4687 }) 34.9481 Tj
0 -389.2278 Td
-(4688 return 0;) 69.8962 Tj
+(4688 iunlockput\(dp\);) 96.1073 Tj
0 -398.7211 Td
-(4689 ) 21.8426 Tj
+(4689 iput\(ip\);) 69.8962 Tj
0 -408.2145 Td
-(4690 bad:) 39.3166 Tj
+(4690 return 0;) 69.8962 Tj
0 -417.7079 Td
-(4691 if\(dp\)) 56.7907 Tj
+(4691 ) 21.8426 Tj
0 -427.2012 Td
-(4692 iunlockput\(dp\);) 104.8443 Tj
+(4692 bad:) 39.3166 Tj
0 -436.6946 Td
(4693 ilock\(ip\);) 74.2647 Tj
0 -446.1879 Td
@@ -16403,6 +16530,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -16420,7 +16549,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysfile.c Page 4) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/sysfile.c Page 4) 174.7406 Tj
0 -28.4801 Td
(4700 // Is the directory dp empty except for "." and ".." ?) 257.7424 Tj
0 -37.9735 Td
@@ -16541,7 +16670,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysfile.c Page 5) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/sysfile.c Page 5) 174.7406 Tj
0 -28.4801 Td
(4750 int) 34.9481 Tj
0 -37.9735 Td
@@ -16619,27 +16748,27 @@ eof\(de\)\)) 279.5849 Tj
0 -370.2411 Td
(4786 panic\("unlink: writei"\);) 144.161 Tj
0 -379.7344 Td
-(4787 iunlockput\(dp\);) 96.1073 Tj
+(4787 if\(ip->type == T_DIR\){) 126.6869 Tj
0 -389.2278 Td
-(4788 ) 21.8426 Tj
+(4788 dp->nlink--;) 91.7388 Tj
0 -398.7211 Td
-(4789 ip->nlink--;) 83.0018 Tj
+(4789 iupdate\(dp\);) 91.7388 Tj
0 -408.2145 Td
-(4790 iupdate\(ip\);) 83.0018 Tj
+(4790 }) 34.9481 Tj
0 -417.7079 Td
-(4791 iunlockput\(ip\);) 96.1073 Tj
+(4791 iunlockput\(dp\);) 96.1073 Tj
0 -427.2012 Td
-(4792 return 0;) 69.8962 Tj
+(4792 ) 21.8426 Tj
0 -436.6946 Td
-(4793 }) 26.2111 Tj
+(4793 ip->nlink--;) 83.0018 Tj
0 -446.1879 Td
-(4794 ) 21.8426 Tj
+(4794 iupdate\(ip\);) 83.0018 Tj
0 -455.6813 Td
-(4795 ) 21.8426 Tj
+(4795 iunlockput\(ip\);) 96.1073 Tj
0 -465.1747 Td
-(4796 ) 21.8426 Tj
+(4796 return 0;) 69.8962 Tj
0 -474.668 Td
-(4797 ) 21.8426 Tj
+(4797 }) 26.2111 Tj
0 -484.1614 Td
(4798 ) 21.8426 Tj
0 -493.6547 Td
@@ -16674,6 +16803,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -16691,12 +16822,11 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysfile.c Page 6) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/sysfile.c Page 6) 174.7406 Tj
0 -28.4801 Td
(4800 static struct inode*) 109.2129 Tj
0 -37.9735 Td
-(4801 create\(char *path, int canexist, short type, short major,\
- short minor\)) 327.6386 Tj
+(4801 create\(char *path, short type, short major, short minor\)) 266.4794 Tj
0 -47.4668 Td
(4802 {) 26.2111 Tj
0 -56.9602 Td
@@ -16716,82 +16846,80 @@ q
0 -123.4137 Td
(4810 ) 21.8426 Tj
0 -132.9071 Td
-(4811 if\(canexist && \(ip = dirlookup\(dp, name, &off\)\) != \
-0\){) 266.4794 Tj
+(4811 if\(\(ip = dirlookup\(dp, name, &off\)\) != 0\){) 214.0572 Tj
0 -142.4004 Td
(4812 iunlockput\(dp\);) 104.8443 Tj
0 -151.8938 Td
(4813 ilock\(ip\);) 83.0018 Tj
0 -161.3871 Td
-(4814 if\(ip->type != type || ip->major != major || ip->mino\
-r != minor\){) 323.2701 Tj
+(4814 if\(type == T_FILE && ip->type == T_FILE\)) 214.0572 Tj
0 -170.8805 Td
-(4815 iunlockput\(ip\);) 113.5814 Tj
+(4815 return ip;) 91.7388 Tj
0 -180.3739 Td
-(4816 return 0;) 87.3703 Tj
+(4816 iunlockput\(ip\);) 104.8443 Tj
0 -189.8672 Td
-(4817 }) 43.6851 Tj
+(4817 return 0;) 78.6333 Tj
0 -199.3606 Td
-(4818 return ip;) 83.0018 Tj
+(4818 }) 34.9481 Tj
0 -208.8539 Td
-(4819 }) 34.9481 Tj
+(4819 ) 21.8426 Tj
0 -218.3473 Td
-(4820 ) 21.8426 Tj
+(4820 if\(\(ip = ialloc\(dp->dev, type\)\) == 0\)) 192.2146 Tj
0 -227.8407 Td
-(4821 if\(\(ip = ialloc\(dp->dev, type\)\) == 0\){) 196.5831 Tj
+(4821 panic\("create: ialloc"\);) 144.161 Tj
0 -237.334 Td
-(4822 iunlockput\(dp\);) 104.8443 Tj
+(4822 ) 21.8426 Tj
0 -246.8274 Td
-(4823 return 0;) 78.6333 Tj
+(4823 ilock\(ip\);) 74.2647 Tj
0 -256.3207 Td
-(4824 }) 34.9481 Tj
+(4824 ip->major = major;) 109.2129 Tj
0 -265.8141 Td
-(4825 ilock\(ip\);) 74.2647 Tj
+(4825 ip->minor = minor;) 109.2129 Tj
0 -275.3075 Td
-(4826 ip->major = major;) 109.2129 Tj
+(4826 ip->nlink = 1;) 91.7388 Tj
0 -284.8008 Td
-(4827 ip->minor = minor;) 109.2129 Tj
+(4827 iupdate\(ip\);) 83.0018 Tj
0 -294.2942 Td
-(4828 ip->nlink = 1;) 91.7388 Tj
+(4828 ) 21.8426 Tj
0 -303.7875 Td
-(4829 iupdate\(ip\);) 83.0018 Tj
+(4829 if\(type == T_DIR\){ // Create . and .. entries.) 235.8998 Tj
0 -313.2809 Td
-(4830 ) 21.8426 Tj
+(4830 dp->nlink++; // for "..") 148.5295 Tj
0 -322.7743 Td
-(4831 if\(dirlink\(dp, name, ip->inum\) < 0\){) 187.8461 Tj
+(4831 iupdate\(dp\);) 91.7388 Tj
0 -332.2676 Td
-(4832 ip->nlink = 0;) 100.4758 Tj
+(4832 // No ip->nlink++ for ".": avoid cyclic ref count.) 257.7424 Tj
0 -341.761 Td
-(4833 iunlockput\(ip\);) 104.8443 Tj
-0 -351.2543 Td
-(4834 iunlockput\(dp\);) 104.8443 Tj
-0 -360.7477 Td
-(4835 return 0;) 78.6333 Tj
-0 -370.2411 Td
-(4836 }) 34.9481 Tj
-0 -379.7344 Td
-(4837 ) 21.8426 Tj
-0 -389.2278 Td
-(4838 if\(type == T_DIR\){ // Create . and .. entries.) 235.8998 Tj
-0 -398.7211 Td
-(4839 dp->nlink++; // for "..") 148.5295 Tj
-0 -408.2145 Td
-(4840 iupdate\(dp\);) 91.7388 Tj
-0 -417.7079 Td
-(4841 // No ip->nlink++ for ".": avoid cyclic ref count.) 257.7424 Tj
-0 -427.2012 Td
-(4842 if\(dirlink\(ip, ".", ip->inum\) < 0 || dirlink\(ip, "\
+(4833 if\(dirlink\(ip, ".", ip->inum\) < 0 || dirlink\(ip, "\
..", dp->inum\) < 0\)) 340.7441 Tj
+0 -351.2543 Td
+(4834 panic\("create dots"\);) 139.7925 Tj
+0 -360.7477 Td
+(4835 }) 34.9481 Tj
+0 -370.2411 Td
+(4836 ) 21.8426 Tj
+0 -379.7344 Td
+(4837 if\(dirlink\(dp, name, ip->inum\) < 0\)) 183.4776 Tj
+0 -389.2278 Td
+(4838 panic\("create: dirlink"\);) 148.5295 Tj
+0 -398.7211 Td
+(4839 ) 21.8426 Tj
+0 -408.2145 Td
+(4840 iunlockput\(dp\);) 96.1073 Tj
+0 -417.7079 Td
+(4841 return ip;) 74.2647 Tj
+0 -427.2012 Td
+(4842 }) 26.2111 Tj
0 -436.6946 Td
-(4843 panic\("create dots"\);) 139.7925 Tj
+(4843 ) 21.8426 Tj
0 -446.1879 Td
-(4844 }) 34.9481 Tj
+(4844 ) 21.8426 Tj
0 -455.6813 Td
-(4845 iunlockput\(dp\);) 96.1073 Tj
+(4845 ) 21.8426 Tj
0 -465.1747 Td
-(4846 return ip;) 74.2647 Tj
+(4846 ) 21.8426 Tj
0 -474.668 Td
-(4847 }) 26.2111 Tj
+(4847 ) 21.8426 Tj
0 -484.1614 Td
(4848 ) 21.8426 Tj
0 -493.6547 Td
@@ -16814,7 +16942,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysfile.c Page 7) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/sysfile.c Page 7) 174.7406 Tj
0 -28.4801 Td
(4850 int) 34.9481 Tj
0 -37.9735 Td
@@ -16840,7 +16968,7 @@ q
0 -132.9071 Td
(4861 if\(omode & O_CREATE\){) 122.3184 Tj
0 -142.4004 Td
-(4862 if\(\(ip = create\(path, 1, T_FILE, 0, 0\)\) == 0\)) 235.8998 Tj
+(4862 if\(\(ip = create\(path, T_FILE, 0, 0\)\) == 0\)) 222.7942 Tj
0 -151.8938 Td
(4863 return -1;) 91.7388 Tj
0 -161.3871 Td
@@ -16852,8 +16980,7 @@ q
0 -189.8672 Td
(4867 ilock\(ip\);) 83.0018 Tj
0 -199.3606 Td
-(4868 if\(ip->type == T_DIR && \(omode & \(O_RDWR|O_WRONLY\)\
-\)\){) 270.8479 Tj
+(4868 if\(ip->type == T_DIR && omode != O_RDONLY\){) 227.1628 Tj
0 -208.8539 Td
(4869 iunlockput\(ip\);) 113.5814 Tj
0 -218.3473 Td
@@ -16948,6 +17075,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -16965,56 +17094,56 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysfile.c Page 8) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/sysfile.c Page 8) 174.7406 Tj
0 -28.4801 Td
(4900 int) 34.9481 Tj
0 -37.9735 Td
-(4901 sys_mknod\(void\)) 87.3703 Tj
+(4901 sys_mkdir\(void\)) 87.3703 Tj
0 -47.4668 Td
(4902 {) 26.2111 Tj
0 -56.9602 Td
-(4903 struct inode *ip;) 104.8443 Tj
+(4903 char *path;) 78.6333 Tj
0 -66.4535 Td
-(4904 char *path;) 78.6333 Tj
+(4904 struct inode *ip;) 104.8443 Tj
0 -75.9469 Td
-(4905 int len;) 65.5277 Tj
+(4905 ) 21.8426 Tj
0 -85.4403 Td
-(4906 int major, minor;) 104.8443 Tj
+(4906 if\(argstr\(0, &path\) < 0 || \(ip = create\(path, T_DIR\
+, 0, 0\)\) == 0\)) 314.533 Tj
0 -94.9336 Td
-(4907 ) 21.8426 Tj
+(4907 return -1;) 83.0018 Tj
0 -104.427 Td
-(4908 if\(\(len=argstr\(0, &path\)\) < 0 ||) 170.3721 Tj
+(4908 iunlockput\(ip\);) 96.1073 Tj
0 -113.9203 Td
-(4909 argint\(1, &major\) < 0 ||) 148.5295 Tj
+(4909 return 0;) 69.8962 Tj
0 -123.4137 Td
-(4910 argint\(2, &minor\) < 0 ||) 148.5295 Tj
+(4910 }) 26.2111 Tj
0 -132.9071 Td
-(4911 \(ip = create\(path, 0, T_DEV, major, minor\)\) == 0\)) 257.7424 Tj
+(4911 ) 21.8426 Tj
0 -142.4004 Td
-(4912 return -1;) 83.0018 Tj
+(4912 int) 34.9481 Tj
0 -151.8938 Td
-(4913 iunlockput\(ip\);) 96.1073 Tj
+(4913 sys_mknod\(void\)) 87.3703 Tj
0 -161.3871 Td
-(4914 return 0;) 69.8962 Tj
+(4914 {) 26.2111 Tj
0 -170.8805 Td
-(4915 }) 26.2111 Tj
+(4915 struct inode *ip;) 104.8443 Tj
0 -180.3739 Td
-(4916 ) 21.8426 Tj
+(4916 char *path;) 78.6333 Tj
0 -189.8672 Td
-(4917 int) 34.9481 Tj
+(4917 int len;) 65.5277 Tj
0 -199.3606 Td
-(4918 sys_mkdir\(void\)) 87.3703 Tj
+(4918 int major, minor;) 104.8443 Tj
0 -208.8539 Td
-(4919 {) 26.2111 Tj
+(4919 ) 21.8426 Tj
0 -218.3473 Td
-(4920 char *path;) 78.6333 Tj
+(4920 if\(\(len=argstr\(0, &path\)\) < 0 ||) 170.3721 Tj
0 -227.8407 Td
-(4921 struct inode *ip;) 104.8443 Tj
+(4921 argint\(1, &major\) < 0 ||) 148.5295 Tj
0 -237.334 Td
-(4922 ) 21.8426 Tj
+(4922 argint\(2, &minor\) < 0 ||) 148.5295 Tj
0 -246.8274 Td
-(4923 if\(argstr\(0, &path\) < 0 || \(ip = create\(path, 0, T_\
-DIR, 0, 0\)\) == 0\)) 327.6386 Tj
+(4923 \(ip = create\(path, T_DEV, major, minor\)\) == 0\)) 244.6368 Tj
0 -256.3207 Td
(4924 return -1;) 83.0018 Tj
0 -265.8141 Td
@@ -17086,7 +17215,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sysfile.c Page 9) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/sysfile.c Page 9) 174.7406 Tj
0 -28.4801 Td
(4950 int) 34.9481 Tj
0 -37.9735 Td
@@ -17219,6 +17348,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -17236,7 +17367,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/exec.c Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/exec.c Page 1) 161.635 Tj
0 -28.4801 Td
(5000 #include "types.h") 100.4758 Tj
0 -37.9735 Td
@@ -17264,7 +17395,7 @@ q
0 -142.4004 Td
(5012 int i, argc, arglen, len, off;) 161.635 Tj
0 -151.8938 Td
-(5013 uint sz, sp, argp;) 109.2129 Tj
+(5013 uint sz, sp, argp, x;) 122.3184 Tj
0 -161.3871 Td
(5014 struct elfhdr elf;) 109.2129 Tj
0 -170.8805 Td
@@ -17274,72 +17405,72 @@ q
0 -189.8672 Td
(5017 ) 21.8426 Tj
0 -199.3606 Td
-(5018 if\(\(ip = namei\(path\)\) == 0\)) 148.5295 Tj
+(5018 mem = 0;) 65.5277 Tj
0 -208.8539 Td
-(5019 return -1;) 83.0018 Tj
+(5019 sz = 0;) 61.1592 Tj
0 -218.3473 Td
-(5020 ilock\(ip\);) 74.2647 Tj
+(5020 ) 21.8426 Tj
0 -227.8407 Td
-(5021 ) 21.8426 Tj
+(5021 if\(\(ip = namei\(path\)\) == 0\)) 148.5295 Tj
0 -237.334 Td
-(5022 // Compute memory size of new process.) 196.5831 Tj
+(5022 return -1;) 83.0018 Tj
0 -246.8274 Td
-(5023 mem = 0;) 65.5277 Tj
+(5023 ilock\(ip\);) 74.2647 Tj
0 -256.3207 Td
-(5024 sz = 0;) 61.1592 Tj
+(5024 ) 21.8426 Tj
0 -265.8141 Td
-(5025 ) 21.8426 Tj
+(5025 // Check ELF header) 113.5814 Tj
0 -275.3075 Td
-(5026 // Program segments.) 117.9499 Tj
-0 -284.8008 Td
-(5027 if\(readi\(ip, \(char*\)&elf, 0, sizeof\(elf\)\) < sizeo\
+(5026 if\(readi\(ip, \(char*\)&elf, 0, sizeof\(elf\)\) < sizeo\
f\(elf\)\)) 275.2164 Tj
+0 -284.8008 Td
+(5027 goto bad;) 78.6333 Tj
0 -294.2942 Td
-(5028 goto bad;) 78.6333 Tj
+(5028 if\(elf.magic != ELF_MAGIC\)) 144.161 Tj
0 -303.7875 Td
-(5029 if\(elf.magic != ELF_MAGIC\)) 144.161 Tj
+(5029 goto bad;) 78.6333 Tj
0 -313.2809 Td
-(5030 goto bad;) 78.6333 Tj
+(5030 ) 21.8426 Tj
0 -322.7743 Td
-(5031 for\(i=0, off=elf.phoff; i<elf.phnum; i++, off+=sizeof\(\
-ph\)\){) 288.322 Tj
+(5031 // Compute memory size of new process.) 196.5831 Tj
0 -332.2676 Td
-(5032 if\(readi\(ip, \(char*\)&ph, off, sizeof\(ph\)\) != si\
-zeof\(ph\)\)) 283.9534 Tj
+(5032 // Program segments.) 117.9499 Tj
0 -341.761 Td
-(5033 goto bad;) 87.3703 Tj
+(5033 for\(i=0, off=elf.phoff; i<elf.phnum; i++, off+=sizeof\(\
+ph\)\){) 288.322 Tj
0 -351.2543 Td
-(5034 if\(ph.type != ELF_PROG_LOAD\)) 161.635 Tj
+(5034 if\(readi\(ip, \(char*\)&ph, off, sizeof\(ph\)\) != si\
+zeof\(ph\)\)) 283.9534 Tj
0 -360.7477 Td
-(5035 continue;) 87.3703 Tj
+(5035 goto bad;) 87.3703 Tj
0 -370.2411 Td
-(5036 if\(ph.memsz < ph.filesz\)) 144.161 Tj
+(5036 if\(ph.type != ELF_PROG_LOAD\)) 161.635 Tj
0 -379.7344 Td
-(5037 goto bad;) 87.3703 Tj
+(5037 continue;) 87.3703 Tj
0 -389.2278 Td
-(5038 sz += ph.memsz;) 104.8443 Tj
+(5038 if\(ph.memsz < ph.filesz\)) 144.161 Tj
0 -398.7211 Td
-(5039 }) 34.9481 Tj
+(5039 goto bad;) 87.3703 Tj
0 -408.2145 Td
-(5040 ) 21.8426 Tj
+(5040 sz += ph.memsz;) 104.8443 Tj
0 -417.7079 Td
-(5041 // Arguments.) 87.3703 Tj
+(5041 }) 34.9481 Tj
0 -427.2012 Td
-(5042 arglen = 0;) 78.6333 Tj
+(5042 ) 21.8426 Tj
0 -436.6946 Td
-(5043 for\(argc=0; argv[argc]; argc++\)) 166.0035 Tj
+(5043 // Arguments.) 87.3703 Tj
0 -446.1879 Td
-(5044 arglen += strlen\(argv[argc]\) + 1;) 183.4776 Tj
+(5044 arglen = 0;) 78.6333 Tj
0 -455.6813 Td
-(5045 arglen = \(arglen+3\) & ~3;) 139.7925 Tj
+(5045 for\(argc=0; argv[argc]; argc++\)) 166.0035 Tj
0 -465.1747 Td
-(5046 sz += arglen + 4*\(argc+1\);) 144.161 Tj
+(5046 arglen += strlen\(argv[argc]\) + 1;) 183.4776 Tj
0 -474.668 Td
-(5047 ) 21.8426 Tj
+(5047 arglen = \(arglen+3\) & ~3;) 139.7925 Tj
0 -484.1614 Td
-(5048 // Stack.) 69.8962 Tj
+(5048 sz += arglen;) 87.3703 Tj
0 -493.6547 Td
-(5049 sz += PAGE;) 78.6333 Tj
+(5049 sz += 4*\(argc+1\); // argv data) 166.0035 Tj
0 -522.1348 Td
(Sheet 50) 34.9481 Tj
Q
@@ -17358,111 +17489,111 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/exec.c Page 2) 161.635 Tj
+(Aug 8 01:04 2009 xv6/exec.c Page 2) 161.635 Tj
0 -28.4801 Td
-(5050 // Allocate program memory.) 148.5295 Tj
+(5050 sz += 4; // argv) 104.8443 Tj
0 -37.9735 Td
-(5051 sz = \(sz+PAGE-1\) & ~\(PAGE-1\);) 157.2665 Tj
+(5051 sz += 4; // argc) 104.8443 Tj
0 -47.4668 Td
-(5052 mem = kalloc\(sz\);) 104.8443 Tj
+(5052 ) 21.8426 Tj
0 -56.9602 Td
-(5053 if\(mem == 0\)) 83.0018 Tj
+(5053 // Stack.) 69.8962 Tj
0 -66.4535 Td
-(5054 goto bad;) 78.6333 Tj
+(5054 sz += PAGE;) 78.6333 Tj
0 -75.9469 Td
-(5055 memset\(mem, 0, sz\);) 113.5814 Tj
+(5055 ) 21.8426 Tj
0 -85.4403 Td
-(5056 ) 21.8426 Tj
+(5056 // Allocate program memory.) 148.5295 Tj
0 -94.9336 Td
-(5057 // Load program into memory.) 152.898 Tj
+(5057 sz = \(sz+PAGE-1\) & ~\(PAGE-1\);) 157.2665 Tj
0 -104.427 Td
-(5058 for\(i=0, off=elf.phoff; i<elf.phnum; i++, off+=sizeof\(\
-ph\)\){) 288.322 Tj
+(5058 mem = kalloc\(sz\);) 104.8443 Tj
0 -113.9203 Td
-(5059 if\(readi\(ip, \(char*\)&ph, off, sizeof\(ph\)\) != si\
-zeof\(ph\)\)) 283.9534 Tj
+(5059 if\(mem == 0\)) 83.0018 Tj
0 -123.4137 Td
-(5060 goto bad;) 87.3703 Tj
+(5060 goto bad;) 78.6333 Tj
0 -132.9071 Td
-(5061 if\(ph.type != ELF_PROG_LOAD\)) 161.635 Tj
+(5061 memset\(mem, 0, sz\);) 113.5814 Tj
0 -142.4004 Td
-(5062 continue;) 87.3703 Tj
+(5062 ) 21.8426 Tj
0 -151.8938 Td
-(5063 if\(ph.va + ph.memsz > sz\)) 148.5295 Tj
+(5063 // Load program into memory.) 152.898 Tj
0 -161.3871 Td
-(5064 goto bad;) 87.3703 Tj
+(5064 for\(i=0, off=elf.phoff; i<elf.phnum; i++, off+=sizeof\(\
+ph\)\){) 288.322 Tj
0 -170.8805 Td
-(5065 if\(readi\(ip, mem + ph.va, ph.offset, ph.filesz\) != \
-ph.filesz\)) 305.796 Tj
+(5065 if\(readi\(ip, \(char*\)&ph, off, sizeof\(ph\)\) != si\
+zeof\(ph\)\)) 283.9534 Tj
0 -180.3739 Td
(5066 goto bad;) 87.3703 Tj
0 -189.8672 Td
-(5067 memset\(mem + ph.va + ph.filesz, 0, ph.memsz - ph.file\
-sz\);) 288.322 Tj
+(5067 if\(ph.type != ELF_PROG_LOAD\)) 161.635 Tj
0 -199.3606 Td
-(5068 }) 34.9481 Tj
+(5068 continue;) 87.3703 Tj
0 -208.8539 Td
-(5069 iunlockput\(ip\);) 96.1073 Tj
+(5069 if\(ph.va + ph.memsz < ph.va || ph.va + ph.memsz > sz\)) 270.8479 Tj
0 -218.3473 Td
-(5070 ) 21.8426 Tj
+(5070 goto bad;) 87.3703 Tj
0 -227.8407 Td
-(5071 // Initialize stack.) 117.9499 Tj
+(5071 if\(ph.memsz < ph.filesz\)) 144.161 Tj
0 -237.334 Td
-(5072 sp = sz;) 65.5277 Tj
+(5072 goto bad;) 87.3703 Tj
0 -246.8274 Td
-(5073 argp = sz - arglen - 4*\(argc+1\);) 170.3721 Tj
+(5073 if\(readi\(ip, mem + ph.va, ph.offset, ph.filesz\) != \
+ph.filesz\)) 305.796 Tj
0 -256.3207 Td
-(5074 ) 21.8426 Tj
+(5074 goto bad;) 87.3703 Tj
0 -265.8141 Td
-(5075 // Copy argv strings and pointers to stack.) 218.4257 Tj
+(5075 memset\(mem + ph.va + ph.filesz, 0, ph.memsz - ph.file\
+sz\);) 288.322 Tj
0 -275.3075 Td
-(5076 *\(uint*\)\(mem+argp + 4*argc\) = 0; // argv[argc]) 235.8998 Tj
+(5076 }) 34.9481 Tj
0 -284.8008 Td
-(5077 for\(i=argc-1; i>=0; i--\){) 139.7925 Tj
+(5077 iunlockput\(ip\);) 96.1073 Tj
0 -294.2942 Td
-(5078 len = strlen\(argv[i]\) + 1;) 152.898 Tj
+(5078 ) 21.8426 Tj
0 -303.7875 Td
-(5079 sp -= len;) 83.0018 Tj
+(5079 // Initialize stack.) 117.9499 Tj
0 -313.2809 Td
-(5080 memmove\(mem+sp, argv[i], len\);) 170.3721 Tj
+(5080 sp = sz;) 65.5277 Tj
0 -322.7743 Td
-(5081 *\(uint*\)\(mem+argp + 4*i\) = sp; // argv[i]) 222.7942 Tj
+(5081 argp = sz - arglen - 4*\(argc+1\);) 170.3721 Tj
0 -332.2676 Td
-(5082 }) 34.9481 Tj
+(5082 ) 21.8426 Tj
0 -341.761 Td
-(5083 ) 21.8426 Tj
+(5083 // Copy argv strings and pointers to stack.) 218.4257 Tj
0 -351.2543 Td
-(5084 // Stack frame for main\(argc, argv\), below arguments.) 262.1109 Tj
+(5084 *\(uint*\)\(mem+argp + 4*argc\) = 0; // argv[argc]) 235.8998 Tj
0 -360.7477 Td
-(5085 sp = argp;) 74.2647 Tj
+(5085 for\(i=argc-1; i>=0; i--\){) 139.7925 Tj
0 -370.2411 Td
-(5086 sp -= 4;) 65.5277 Tj
+(5086 len = strlen\(argv[i]\) + 1;) 152.898 Tj
0 -379.7344 Td
-(5087 *\(uint*\)\(mem+sp\) = argp;) 135.4239 Tj
+(5087 sp -= len;) 83.0018 Tj
0 -389.2278 Td
-(5088 sp -= 4;) 65.5277 Tj
+(5088 memmove\(mem+sp, argv[i], len\);) 170.3721 Tj
0 -398.7211 Td
-(5089 *\(uint*\)\(mem+sp\) = argc;) 135.4239 Tj
+(5089 *\(uint*\)\(mem+argp + 4*i\) = sp; // argv[i]) 222.7942 Tj
0 -408.2145 Td
-(5090 sp -= 4;) 65.5277 Tj
+(5090 }) 34.9481 Tj
0 -417.7079 Td
-(5091 *\(uint*\)\(mem+sp\) = 0xffffffff; // fake return pc) 249.0053 Tj
+(5091 ) 21.8426 Tj
0 -427.2012 Td
-(5092 ) 21.8426 Tj
+(5092 // Stack frame for main\(argc, argv\), below arguments.) 262.1109 Tj
0 -436.6946 Td
-(5093 // Save program name for debugging.) 183.4776 Tj
+(5093 sp = argp;) 74.2647 Tj
0 -446.1879 Td
-(5094 for\(last=s=path; *s; s++\)) 139.7925 Tj
+(5094 sp -= 4;) 65.5277 Tj
0 -455.6813 Td
-(5095 if\(*s == '/'\)) 96.1073 Tj
+(5095 *\(uint*\)\(mem+sp\) = argp;) 135.4239 Tj
0 -465.1747 Td
-(5096 last = s+1;) 96.1073 Tj
+(5096 sp -= 4;) 65.5277 Tj
0 -474.668 Td
-(5097 safestrcpy\(cp->name, last, sizeof\(cp->name\)\);) 227.1628 Tj
+(5097 *\(uint*\)\(mem+sp\) = argc;) 135.4239 Tj
0 -484.1614 Td
-(5098 ) 21.8426 Tj
+(5098 sp -= 4;) 65.5277 Tj
0 -493.6547 Td
-(5099 ) 21.8426 Tj
+(5099 *\(uint*\)\(mem+sp\) = 0xffffffff; // fake return pc) 249.0053 Tj
0 -522.1348 Td
(Sheet 50) 34.9481 Tj
Q
@@ -17493,6 +17624,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -17510,49 +17643,49 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/exec.c Page 3) 161.635 Tj
+(Aug 8 01:04 2009 xv6/exec.c Page 3) 161.635 Tj
0 -28.4801 Td
-(5100 // Commit to the new image.) 148.5295 Tj
+(5100 // Save program name for debugging.) 183.4776 Tj
0 -37.9735 Td
-(5101 kfree\(cp->mem, cp->sz\);) 131.0554 Tj
+(5101 for\(last=s=path; *s; s++\)) 139.7925 Tj
0 -47.4668 Td
-(5102 cp->mem = mem;) 91.7388 Tj
+(5102 if\(*s == '/'\)) 96.1073 Tj
0 -56.9602 Td
-(5103 cp->sz = sz;) 83.0018 Tj
+(5103 last = s+1;) 96.1073 Tj
0 -66.4535 Td
-(5104 cp->tf->eip = elf.entry; // main) 174.7406 Tj
+(5104 safestrcpy\(cp->name, last, sizeof\(cp->name\)\);) 227.1628 Tj
0 -75.9469 Td
-(5105 cp->tf->esp = sp;) 104.8443 Tj
+(5105 ) 21.8426 Tj
0 -85.4403 Td
-(5106 setupsegs\(cp\);) 91.7388 Tj
+(5106 // Commit to the new image.) 148.5295 Tj
0 -94.9336 Td
-(5107 return 0;) 69.8962 Tj
+(5107 kfree\(cp->mem, cp->sz\);) 131.0554 Tj
0 -104.427 Td
-(5108 ) 21.8426 Tj
+(5108 cp->mem = mem;) 91.7388 Tj
0 -113.9203 Td
-(5109 bad:) 43.6851 Tj
+(5109 cp->sz = sz;) 83.0018 Tj
0 -123.4137 Td
-(5110 if\(mem\)) 61.1592 Tj
+(5110 cp->tf->eip = elf.entry; // main) 174.7406 Tj
0 -132.9071 Td
-(5111 kfree\(mem, sz\);) 104.8443 Tj
+(5111 cp->tf->esp = sp;) 104.8443 Tj
0 -142.4004 Td
-(5112 iunlockput\(ip\);) 96.1073 Tj
+(5112 usegment\(\);) 78.6333 Tj
0 -151.8938 Td
-(5113 return -1;) 74.2647 Tj
+(5113 return 0;) 69.8962 Tj
0 -161.3871 Td
-(5114 }) 26.2111 Tj
+(5114 ) 21.8426 Tj
0 -170.8805 Td
-(5115 ) 21.8426 Tj
+(5115 bad:) 43.6851 Tj
0 -180.3739 Td
-(5116 ) 21.8426 Tj
+(5116 if\(mem\)) 61.1592 Tj
0 -189.8672 Td
-(5117 ) 21.8426 Tj
+(5117 kfree\(mem, sz\);) 104.8443 Tj
0 -199.3606 Td
-(5118 ) 21.8426 Tj
+(5118 iunlockput\(ip\);) 96.1073 Tj
0 -208.8539 Td
-(5119 ) 21.8426 Tj
+(5119 return -1;) 74.2647 Tj
0 -218.3473 Td
-(5120 ) 21.8426 Tj
+(5120 }) 26.2111 Tj
0 -227.8407 Td
(5121 ) 21.8426 Tj
0 -237.334 Td
@@ -17629,7 +17762,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/pipe.c Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/pipe.c Page 1) 161.635 Tj
0 -28.4801 Td
(5150 #include "types.h") 100.4758 Tj
0 -37.9735 Td
@@ -17653,17 +17786,17 @@ q
0 -123.4137 Td
(5160 struct pipe {) 78.6333 Tj
0 -132.9071 Td
-(5161 int readopen; // read fd is still open) 205.3202 Tj
+(5161 struct spinlock lock;) 122.3184 Tj
0 -142.4004 Td
-(5162 int writeopen; // write fd is still open) 209.6887 Tj
+(5162 char data[PIPESIZE];) 117.9499 Tj
0 -151.8938 Td
-(5163 uint writep; // next index to write) 196.5831 Tj
+(5163 uint nread; // number of bytes read) 200.9517 Tj
0 -161.3871 Td
-(5164 uint readp; // next index to read) 192.2146 Tj
+(5164 uint nwrite; // number of bytes written) 214.0572 Tj
0 -170.8805 Td
-(5165 struct spinlock lock;) 122.3184 Tj
+(5165 int readopen; // read fd is still open) 205.3202 Tj
0 -180.3739 Td
-(5166 char data[PIPESIZE];) 117.9499 Tj
+(5166 int writeopen; // write fd is still open) 209.6887 Tj
0 -189.8672 Td
(5167 };) 30.5796 Tj
0 -199.3606 Td
@@ -17696,9 +17829,9 @@ q
0 -322.7743 Td
(5181 p->writeopen = 1;) 104.8443 Tj
0 -332.2676 Td
-(5182 p->writep = 0;) 91.7388 Tj
+(5182 p->nwrite = 0;) 91.7388 Tj
0 -341.761 Td
-(5183 p->readp = 0;) 87.3703 Tj
+(5183 p->nread = 0;) 87.3703 Tj
0 -351.2543 Td
(5184 initlock\(&p->lock, "pipe"\);) 148.5295 Tj
0 -360.7477 Td
@@ -17761,6 +17894,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -17778,7 +17913,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/pipe.c Page 2) 161.635 Tj
+(Aug 8 01:04 2009 xv6/pipe.c Page 2) 161.635 Tj
0 -28.4801 Td
(5200 bad:) 43.6851 Tj
0 -37.9735 Td
@@ -17786,99 +17921,99 @@ q
0 -47.4668 Td
(5202 kfree\(\(char*\)p, PAGE\);) 135.4239 Tj
0 -56.9602 Td
-(5203 if\(*f0\){) 65.5277 Tj
+(5203 if\(*f0\)) 61.1592 Tj
0 -66.4535 Td
-(5204 \(*f0\)->type = FD_NONE;) 135.4239 Tj
+(5204 fileclose\(*f0\);) 104.8443 Tj
0 -75.9469 Td
-(5205 fileclose\(*f0\);) 104.8443 Tj
+(5205 if\(*f1\)) 61.1592 Tj
0 -85.4403 Td
-(5206 }) 34.9481 Tj
+(5206 fileclose\(*f1\);) 104.8443 Tj
0 -94.9336 Td
-(5207 if\(*f1\){) 65.5277 Tj
+(5207 return -1;) 74.2647 Tj
0 -104.427 Td
-(5208 \(*f1\)->type = FD_NONE;) 135.4239 Tj
+(5208 }) 26.2111 Tj
0 -113.9203 Td
-(5209 fileclose\(*f1\);) 104.8443 Tj
+(5209 ) 21.8426 Tj
0 -123.4137 Td
-(5210 }) 34.9481 Tj
+(5210 void) 39.3166 Tj
0 -132.9071 Td
-(5211 return -1;) 74.2647 Tj
+(5211 pipeclose\(struct pipe *p, int writable\)) 192.2146 Tj
0 -142.4004 Td
-(5212 }) 26.2111 Tj
+(5212 {) 26.2111 Tj
0 -151.8938 Td
-(5213 ) 21.8426 Tj
+(5213 acquire\(&p->lock\);) 109.2129 Tj
0 -161.3871 Td
-(5214 void) 39.3166 Tj
+(5214 if\(writable\){) 87.3703 Tj
0 -170.8805 Td
-(5215 pipeclose\(struct pipe *p, int writable\)) 192.2146 Tj
+(5215 p->writeopen = 0;) 113.5814 Tj
0 -180.3739 Td
-(5216 {) 26.2111 Tj
+(5216 wakeup\(&p->nread\);) 117.9499 Tj
0 -189.8672 Td
-(5217 acquire\(&p->lock\);) 109.2129 Tj
+(5217 } else {) 65.5277 Tj
0 -199.3606 Td
-(5218 if\(writable\){) 87.3703 Tj
+(5218 p->readopen = 0;) 109.2129 Tj
0 -208.8539 Td
-(5219 p->writeopen = 0;) 113.5814 Tj
+(5219 wakeup\(&p->nwrite\);) 122.3184 Tj
0 -218.3473 Td
-(5220 wakeup\(&p->readp\);) 117.9499 Tj
+(5220 }) 34.9481 Tj
0 -227.8407 Td
-(5221 } else {) 65.5277 Tj
+(5221 if\(p->readopen == 0 && p->writeopen == 0\) {) 218.4257 Tj
0 -237.334 Td
-(5222 p->readopen = 0;) 109.2129 Tj
+(5222 release\(&p->lock\);) 117.9499 Tj
0 -246.8274 Td
-(5223 wakeup\(&p->writep\);) 122.3184 Tj
+(5223 kfree\(\(char*\)p, PAGE\);) 135.4239 Tj
0 -256.3207 Td
-(5224 }) 34.9481 Tj
+(5224 } else) 56.7907 Tj
0 -265.8141 Td
-(5225 release\(&p->lock\);) 109.2129 Tj
+(5225 release\(&p->lock\);) 117.9499 Tj
0 -275.3075 Td
-(5226 ) 21.8426 Tj
+(5226 }) 26.2111 Tj
0 -284.8008 Td
-(5227 if\(p->readopen == 0 && p->writeopen == 0\)) 209.6887 Tj
+(5227 ) 21.8426 Tj
0 -294.2942 Td
-(5228 kfree\(\(char*\)p, PAGE\);) 135.4239 Tj
+(5228 ) 21.8426 Tj
0 -303.7875 Td
-(5229 }) 26.2111 Tj
+(5229 int) 34.9481 Tj
0 -313.2809 Td
-(5230 ) 21.8426 Tj
+(5230 pipewrite\(struct pipe *p, char *addr, int n\)) 214.0572 Tj
0 -322.7743 Td
-(5231 ) 21.8426 Tj
+(5231 {) 26.2111 Tj
0 -332.2676 Td
-(5232 ) 21.8426 Tj
+(5232 int i;) 56.7907 Tj
0 -341.761 Td
(5233 ) 21.8426 Tj
0 -351.2543 Td
-(5234 ) 21.8426 Tj
+(5234 acquire\(&p->lock\);) 109.2129 Tj
0 -360.7477 Td
-(5235 ) 21.8426 Tj
+(5235 for\(i = 0; i < n; i++\){) 131.0554 Tj
0 -370.2411 Td
-(5236 ) 21.8426 Tj
+(5236 while\(p->nwrite == p->nread + PIPESIZE\) { ) 227.1628 Tj
0 -379.7344 Td
-(5237 ) 21.8426 Tj
+(5237 if\(p->readopen == 0 || cp->killed\){) 200.9517 Tj
0 -389.2278 Td
-(5238 ) 21.8426 Tj
+(5238 release\(&p->lock\);) 135.4239 Tj
0 -398.7211 Td
-(5239 ) 21.8426 Tj
+(5239 return -1;) 100.4758 Tj
0 -408.2145 Td
-(5240 ) 21.8426 Tj
+(5240 }) 52.4222 Tj
0 -417.7079 Td
-(5241 ) 21.8426 Tj
+(5241 wakeup\(&p->nread\);) 126.6869 Tj
0 -427.2012 Td
-(5242 ) 21.8426 Tj
+(5242 sleep\(&p->nwrite, &p->lock\); ) 179.1091 Tj
0 -436.6946 Td
-(5243 ) 21.8426 Tj
+(5243 }) 43.6851 Tj
0 -446.1879 Td
-(5244 ) 21.8426 Tj
+(5244 p->data[p->nwrite++ % PIPESIZE] = addr[i];) 222.7942 Tj
0 -455.6813 Td
-(5245 ) 21.8426 Tj
+(5245 }) 34.9481 Tj
0 -465.1747 Td
-(5246 ) 21.8426 Tj
+(5246 wakeup\(&p->nread\); ) 117.9499 Tj
0 -474.668 Td
-(5247 ) 21.8426 Tj
+(5247 release\(&p->lock\);) 109.2129 Tj
0 -484.1614 Td
-(5248 ) 21.8426 Tj
+(5248 return n;) 69.8962 Tj
0 -493.6547 Td
-(5249 ) 21.8426 Tj
+(5249 }) 26.2111 Tj
0 -522.1348 Td
(Sheet 52) 34.9481 Tj
Q
@@ -17897,11 +18032,11 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/pipe.c Page 3) 161.635 Tj
+(Aug 8 01:04 2009 xv6/pipe.c Page 3) 161.635 Tj
0 -28.4801 Td
(5250 int) 34.9481 Tj
0 -37.9735 Td
-(5251 pipewrite\(struct pipe *p, char *addr, int n\)) 214.0572 Tj
+(5251 piperead\(struct pipe *p, char *addr, int n\)) 209.6887 Tj
0 -47.4668 Td
(5252 {) 26.2111 Tj
0 -56.9602 Td
@@ -17911,81 +18046,81 @@ q
0 -75.9469 Td
(5255 acquire\(&p->lock\);) 109.2129 Tj
0 -85.4403 Td
-(5256 for\(i = 0; i < n; i++\){) 131.0554 Tj
+(5256 while\(p->nread == p->nwrite && p->writeopen\){ ) 235.8998 Tj
0 -94.9336 Td
-(5257 while\(p->writep == p->readp + PIPESIZE\) {) 218.4257 Tj
+(5257 if\(cp->killed\){) 104.8443 Tj
0 -104.427 Td
-(5258 if\(p->readopen == 0 || cp->killed\){) 200.9517 Tj
+(5258 release\(&p->lock\);) 126.6869 Tj
0 -113.9203 Td
-(5259 release\(&p->lock\);) 135.4239 Tj
+(5259 return -1;) 91.7388 Tj
0 -123.4137 Td
-(5260 return -1;) 100.4758 Tj
+(5260 }) 43.6851 Tj
0 -132.9071 Td
-(5261 }) 52.4222 Tj
+(5261 sleep\(&p->nread, &p->lock\); ) 161.635 Tj
0 -142.4004 Td
-(5262 wakeup\(&p->readp\);) 126.6869 Tj
+(5262 }) 34.9481 Tj
0 -151.8938 Td
-(5263 sleep\(&p->writep, &p->lock\);) 170.3721 Tj
+(5263 for\(i = 0; i < n; i++\){ ) 139.7925 Tj
0 -161.3871 Td
-(5264 }) 43.6851 Tj
+(5264 if\(p->nread == p->nwrite\)) 148.5295 Tj
0 -170.8805 Td
-(5265 p->data[p->writep++ % PIPESIZE] = addr[i];) 222.7942 Tj
+(5265 break;) 74.2647 Tj
0 -180.3739 Td
-(5266 }) 34.9481 Tj
+(5266 addr[i] = p->data[p->nread++ % PIPESIZE];) 218.4257 Tj
0 -189.8672 Td
-(5267 wakeup\(&p->readp\);) 109.2129 Tj
+(5267 }) 34.9481 Tj
0 -199.3606 Td
-(5268 release\(&p->lock\);) 109.2129 Tj
+(5268 wakeup\(&p->nwrite\); ) 122.3184 Tj
0 -208.8539 Td
-(5269 return i;) 69.8962 Tj
+(5269 release\(&p->lock\);) 109.2129 Tj
0 -218.3473 Td
-(5270 }) 26.2111 Tj
+(5270 return i;) 69.8962 Tj
0 -227.8407 Td
-(5271 ) 21.8426 Tj
+(5271 }) 26.2111 Tj
0 -237.334 Td
-(5272 int) 34.9481 Tj
+(5272 ) 21.8426 Tj
0 -246.8274 Td
-(5273 piperead\(struct pipe *p, char *addr, int n\)) 209.6887 Tj
+(5273 ) 21.8426 Tj
0 -256.3207 Td
-(5274 {) 26.2111 Tj
+(5274 ) 21.8426 Tj
0 -265.8141 Td
-(5275 int i;) 56.7907 Tj
+(5275 ) 21.8426 Tj
0 -275.3075 Td
(5276 ) 21.8426 Tj
0 -284.8008 Td
-(5277 acquire\(&p->lock\);) 109.2129 Tj
+(5277 ) 21.8426 Tj
0 -294.2942 Td
-(5278 while\(p->readp == p->writep && p->writeopen\){) 227.1628 Tj
+(5278 ) 21.8426 Tj
0 -303.7875 Td
-(5279 if\(cp->killed\){) 104.8443 Tj
+(5279 ) 21.8426 Tj
0 -313.2809 Td
-(5280 release\(&p->lock\);) 126.6869 Tj
+(5280 ) 21.8426 Tj
0 -322.7743 Td
-(5281 return -1;) 91.7388 Tj
+(5281 ) 21.8426 Tj
0 -332.2676 Td
-(5282 }) 43.6851 Tj
+(5282 ) 21.8426 Tj
0 -341.761 Td
-(5283 sleep\(&p->readp, &p->lock\);) 157.2665 Tj
+(5283 ) 21.8426 Tj
0 -351.2543 Td
-(5284 }) 34.9481 Tj
+(5284 ) 21.8426 Tj
0 -360.7477 Td
-(5285 for\(i = 0; i < n; i++\){) 131.0554 Tj
+(5285 ) 21.8426 Tj
0 -370.2411 Td
-(5286 if\(p->readp == p->writep\)) 148.5295 Tj
+(5286 ) 21.8426 Tj
0 -379.7344 Td
-(5287 break;) 74.2647 Tj
+(5287 ) 21.8426 Tj
0 -389.2278 Td
-(5288 addr[i] = p->data[p->readp++ % PIPESIZE];) 218.4257 Tj
+(5288 ) 21.8426 Tj
0 -398.7211 Td
-(5289 }) 34.9481 Tj
+(5289 ) 21.8426 Tj
0 -408.2145 Td
-(5290 wakeup\(&p->writep\);) 113.5814 Tj
+(5290 ) 21.8426 Tj
0 -417.7079 Td
-(5291 release\(&p->lock\);) 109.2129 Tj
+(5291 ) 21.8426 Tj
0 -427.2012 Td
-(5292 return i;) 69.8962 Tj
+(5292 ) 21.8426 Tj
0 -436.6946 Td
-(5293 }) 26.2111 Tj
+(5293 ) 21.8426 Tj
0 -446.1879 Td
(5294 ) 21.8426 Tj
0 -455.6813 Td
@@ -18028,6 +18163,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -18045,105 +18182,105 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/string.c Page 1) 170.3721 Tj
+(Aug 8 01:04 2009 xv6/string.c Page 1) 170.3721 Tj
0 -28.4801 Td
(5300 #include "types.h") 100.4758 Tj
0 -37.9735 Td
-(5301 ) 21.8426 Tj
+(5301 #include "x86.h") 91.7388 Tj
0 -47.4668 Td
-(5302 void*) 43.6851 Tj
+(5302 ) 21.8426 Tj
0 -56.9602 Td
-(5303 memset\(void *dst, int c, uint n\)) 161.635 Tj
+(5303 void*) 43.6851 Tj
0 -66.4535 Td
-(5304 {) 26.2111 Tj
+(5304 memset\(void *dst, int c, uint n\)) 161.635 Tj
0 -75.9469 Td
-(5305 char *d;) 65.5277 Tj
+(5305 {) 26.2111 Tj
0 -85.4403 Td
-(5306 ) 21.8426 Tj
+(5306 stosb\(dst, c, n\);) 104.8443 Tj
0 -94.9336 Td
-(5307 d = \(char*\)dst;) 96.1073 Tj
+(5307 return dst;) 78.6333 Tj
0 -104.427 Td
-(5308 while\(n-- > 0\)) 91.7388 Tj
+(5308 }) 26.2111 Tj
0 -113.9203 Td
-(5309 *d++ = c;) 78.6333 Tj
+(5309 ) 21.8426 Tj
0 -123.4137 Td
-(5310 ) 21.8426 Tj
+(5310 int) 34.9481 Tj
0 -132.9071 Td
-(5311 return dst;) 78.6333 Tj
+(5311 memcmp\(const void *v1, const void *v2, uint n\)) 222.7942 Tj
0 -142.4004 Td
-(5312 }) 26.2111 Tj
+(5312 {) 26.2111 Tj
0 -151.8938 Td
-(5313 ) 21.8426 Tj
+(5313 const uchar *s1, *s2;) 122.3184 Tj
0 -161.3871 Td
-(5314 int) 34.9481 Tj
+(5314 ) 21.8426 Tj
0 -170.8805 Td
-(5315 memcmp\(const void *v1, const void *v2, uint n\)) 222.7942 Tj
+(5315 s1 = v1;) 65.5277 Tj
0 -180.3739 Td
-(5316 {) 26.2111 Tj
+(5316 s2 = v2;) 65.5277 Tj
0 -189.8672 Td
-(5317 const uchar *s1, *s2;) 122.3184 Tj
+(5317 while\(n-- > 0\){) 96.1073 Tj
0 -199.3606 Td
-(5318 ) 21.8426 Tj
+(5318 if\(*s1 != *s2\)) 100.4758 Tj
0 -208.8539 Td
-(5319 s1 = v1;) 65.5277 Tj
+(5319 return *s1 - *s2;) 122.3184 Tj
0 -218.3473 Td
-(5320 s2 = v2;) 65.5277 Tj
+(5320 s1++, s2++;) 87.3703 Tj
0 -227.8407 Td
-(5321 while\(n-- > 0\){) 96.1073 Tj
+(5321 }) 34.9481 Tj
0 -237.334 Td
-(5322 if\(*s1 != *s2\)) 100.4758 Tj
+(5322 ) 21.8426 Tj
0 -246.8274 Td
-(5323 return *s1 - *s2;) 122.3184 Tj
+(5323 return 0;) 69.8962 Tj
0 -256.3207 Td
-(5324 s1++, s2++;) 87.3703 Tj
+(5324 }) 26.2111 Tj
0 -265.8141 Td
-(5325 }) 34.9481 Tj
+(5325 ) 21.8426 Tj
0 -275.3075 Td
-(5326 ) 21.8426 Tj
+(5326 void*) 43.6851 Tj
0 -284.8008 Td
-(5327 return 0;) 69.8962 Tj
+(5327 memmove\(void *dst, const void *src, uint n\)) 209.6887 Tj
0 -294.2942 Td
-(5328 }) 26.2111 Tj
+(5328 {) 26.2111 Tj
0 -303.7875 Td
-(5329 ) 21.8426 Tj
+(5329 const char *s;) 91.7388 Tj
0 -313.2809 Td
-(5330 void*) 43.6851 Tj
+(5330 char *d;) 65.5277 Tj
0 -322.7743 Td
-(5331 memmove\(void *dst, const void *src, uint n\)) 209.6887 Tj
+(5331 ) 21.8426 Tj
0 -332.2676 Td
-(5332 {) 26.2111 Tj
+(5332 s = src;) 65.5277 Tj
0 -341.761 Td
-(5333 const char *s;) 91.7388 Tj
+(5333 d = dst;) 65.5277 Tj
0 -351.2543 Td
-(5334 char *d;) 65.5277 Tj
+(5334 if\(s < d && s + n > d\){) 131.0554 Tj
0 -360.7477 Td
-(5335 ) 21.8426 Tj
+(5335 s += n;) 69.8962 Tj
0 -370.2411 Td
-(5336 s = src;) 65.5277 Tj
+(5336 d += n;) 69.8962 Tj
0 -379.7344 Td
-(5337 d = dst;) 65.5277 Tj
+(5337 while\(n-- > 0\)) 100.4758 Tj
0 -389.2278 Td
-(5338 if\(s < d && s + n > d\){) 131.0554 Tj
+(5338 *--d = *--s;) 100.4758 Tj
0 -398.7211 Td
-(5339 s += n;) 69.8962 Tj
+(5339 } else) 56.7907 Tj
0 -408.2145 Td
-(5340 d += n;) 69.8962 Tj
+(5340 while\(n-- > 0\)) 100.4758 Tj
0 -417.7079 Td
-(5341 while\(n-- > 0\)) 100.4758 Tj
+(5341 *d++ = *s++;) 100.4758 Tj
0 -427.2012 Td
-(5342 *--d = *--s;) 100.4758 Tj
+(5342 ) 21.8426 Tj
0 -436.6946 Td
-(5343 } else) 56.7907 Tj
+(5343 return dst;) 78.6333 Tj
0 -446.1879 Td
-(5344 while\(n-- > 0\)) 100.4758 Tj
+(5344 }) 26.2111 Tj
0 -455.6813 Td
-(5345 *d++ = *s++;) 100.4758 Tj
+(5345 ) 21.8426 Tj
0 -465.1747 Td
(5346 ) 21.8426 Tj
0 -474.668 Td
-(5347 return dst;) 78.6333 Tj
+(5347 ) 21.8426 Tj
0 -484.1614 Td
-(5348 }) 26.2111 Tj
+(5348 ) 21.8426 Tj
0 -493.6547 Td
(5349 ) 21.8426 Tj
0 -522.1348 Td
@@ -18164,7 +18301,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/string.c Page 2) 170.3721 Tj
+(Aug 8 01:04 2009 xv6/string.c Page 2) 170.3721 Tj
0 -28.4801 Td
(5350 int) 34.9481 Tj
0 -37.9735 Td
@@ -18295,6 +18432,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -18312,7 +18451,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/mp.h Page 1) 152.898 Tj
+(Aug 8 01:04 2009 xv6/mp.h Page 1) 152.898 Tj
0 -28.4801 Td
(5400 // See MultiProcessor Specification Version 1.[14]) 240.2683 Tj
0 -37.9735 Td
@@ -18436,7 +18575,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/mp.h Page 2) 152.898 Tj
+(Aug 8 01:04 2009 xv6/mp.h Page 2) 152.898 Tj
0 -28.4801 Td
(5450 // Table entry types) 109.2129 Tj
0 -37.9735 Td
@@ -18567,6 +18706,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -18584,7 +18725,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/mp.c Page 1) 152.898 Tj
+(Aug 8 01:04 2009 xv6/mp.c Page 1) 152.898 Tj
0 -28.4801 Td
(5500 // Multiprocessor bootstrap.) 144.161 Tj
0 -37.9735 Td
@@ -18619,13 +18760,13 @@ q
0 -170.8805 Td
(5515 int ncpu;) 61.1592 Tj
0 -180.3739 Td
-(5516 uchar ioapic_id;) 91.7388 Tj
+(5516 uchar ioapicid;) 87.3703 Tj
0 -189.8672 Td
(5517 ) 21.8426 Tj
0 -199.3606 Td
(5518 int) 34.9481 Tj
0 -208.8539 Td
-(5519 mp_bcpu\(void\)) 78.6333 Tj
+(5519 mpbcpu\(void\)) 74.2647 Tj
0 -218.3473 Td
(5520 {) 26.2111 Tj
0 -227.8407 Td
@@ -18661,7 +18802,7 @@ q
0 -370.2411 Td
(5536 static struct mp*) 96.1073 Tj
0 -379.7344 Td
-(5537 mp_search1\(uchar *addr, int len\)) 161.635 Tj
+(5537 mpsearch1\(uchar *addr, int len\)) 157.2665 Tj
0 -389.2278 Td
(5538 {) 26.2111 Tj
0 -398.7211 Td
@@ -18705,7 +18846,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/mp.c Page 2) 152.898 Tj
+(Aug 8 01:04 2009 xv6/mp.c Page 2) 152.898 Tj
0 -28.4801 Td
(5550 // Search for the MP Floating Pointer Structure, which acc\
ording to the) 332.0071 Tj
@@ -18720,7 +18861,7 @@ ording to the) 332.0071 Tj
0 -75.9469 Td
(5555 static struct mp*) 96.1073 Tj
0 -85.4403 Td
-(5556 mp_search\(void\)) 87.3703 Tj
+(5556 mpsearch\(void\)) 83.0018 Tj
0 -94.9336 Td
(5557 {) 26.2111 Tj
0 -104.427 Td
@@ -18736,7 +18877,7 @@ ording to the) 332.0071 Tj
0 -151.8938 Td
(5563 if\(\(p = \(\(bda[0x0F]<<8\)|bda[0x0E]\) << 4\)\){) 214.0572 Tj
0 -161.3871 Td
-(5564 if\(\(mp = mp_search1\(\(uchar*\)p, 1024\)\)\)) 205.3202 Tj
+(5564 if\(\(mp = mpsearch1\(\(uchar*\)p, 1024\)\)\)) 200.9517 Tj
0 -170.8805 Td
(5565 return mp;) 91.7388 Tj
0 -180.3739 Td
@@ -18744,13 +18885,13 @@ ording to the) 332.0071 Tj
0 -189.8672 Td
(5567 p = \(\(bda[0x14]<<8\)|bda[0x13]\)*1024;) 196.5831 Tj
0 -199.3606 Td
-(5568 if\(\(mp = mp_search1\(\(uchar*\)p-1024, 1024\)\)\)) 227.1628 Tj
+(5568 if\(\(mp = mpsearch1\(\(uchar*\)p-1024, 1024\)\)\)) 222.7942 Tj
0 -208.8539 Td
(5569 return mp;) 91.7388 Tj
0 -218.3473 Td
(5570 }) 34.9481 Tj
0 -227.8407 Td
-(5571 return mp_search1\(\(uchar*\)0xF0000, 0x10000\);) 222.7942 Tj
+(5571 return mpsearch1\(\(uchar*\)0xF0000, 0x10000\);) 218.4257 Tj
0 -237.334 Td
(5572 }) 26.2111 Tj
0 -246.8274 Td
@@ -18770,7 +18911,7 @@ ording to the) 332.0071 Tj
0 -303.7875 Td
(5579 static struct mpconf*) 113.5814 Tj
0 -313.2809 Td
-(5580 mp_config\(struct mp **pmp\)) 135.4239 Tj
+(5580 mpconfig\(struct mp **pmp\)) 131.0554 Tj
0 -322.7743 Td
(5581 {) 26.2111 Tj
0 -332.2676 Td
@@ -18780,7 +18921,7 @@ ording to the) 332.0071 Tj
0 -351.2543 Td
(5584 ) 21.8426 Tj
0 -360.7477 Td
-(5585 if\(\(mp = mp_search\(\)\) == 0 || mp->physaddr == 0\)) 240.2683 Tj
+(5585 if\(\(mp = mpsearch\(\)\) == 0 || mp->physaddr == 0\)) 235.8998 Tj
0 -370.2411 Td
(5586 return 0;) 78.6333 Tj
0 -379.7344 Td
@@ -18839,6 +18980,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -18856,11 +18999,11 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/mp.c Page 3) 152.898 Tj
+(Aug 8 01:04 2009 xv6/mp.c Page 3) 152.898 Tj
0 -28.4801 Td
(5600 void) 39.3166 Tj
0 -37.9735 Td
-(5601 mp_init\(void\)) 78.6333 Tj
+(5601 mpinit\(void\)) 74.2647 Tj
0 -47.4668 Td
(5602 {) 26.2111 Tj
0 -56.9602 Td
@@ -18878,7 +19021,7 @@ q
0 -113.9203 Td
(5609 bcpu = &cpus[ncpu];) 113.5814 Tj
0 -123.4137 Td
-(5610 if\(\(conf = mp_config\(&mp\)\) == 0\)) 170.3721 Tj
+(5610 if\(\(conf = mpconfig\(&mp\)\) == 0\)) 166.0035 Tj
0 -132.9071 Td
(5611 return;) 69.8962 Tj
0 -142.4004 Td
@@ -18915,7 +19058,7 @@ th; p<e; \){) 292.6905 Tj
0 -284.8008 Td
(5627 ioapic = \(struct mpioapic*\)p;) 174.7406 Tj
0 -294.2942 Td
-(5628 ioapic_id = ioapic->apicno;) 166.0035 Tj
+(5628 ioapicid = ioapic->apicno;) 161.635 Tj
0 -303.7875 Td
(5629 p += sizeof\(struct mpioapic\);) 174.7406 Tj
0 -313.2809 Td
@@ -18933,9 +19076,9 @@ th; p<e; \){) 292.6905 Tj
0 -370.2411 Td
(5636 default:) 74.2647 Tj
0 -379.7344 Td
-(5637 cprintf\("mp_init: unknown config type %x\\n", *p\);) 262.1109 Tj
+(5637 cprintf\("mpinit: unknown config type %x\\n", *p\);) 257.7424 Tj
0 -389.2278 Td
-(5638 panic\("mp_init"\);) 122.3184 Tj
+(5638 panic\("mpinit"\);) 117.9499 Tj
0 -398.7211 Td
(5639 }) 43.6851 Tj
0 -408.2145 Td
@@ -18978,7 +19121,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/lapic.c Page 1) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/lapic.c Page 1) 166.0035 Tj
0 -28.4801 Td
(5650 // The local APIC manages internal \(non-I/O\) interrupts.) 266.4794 Tj
0 -37.9735 Td
@@ -19120,6 +19263,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -19137,11 +19282,11 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/lapic.c Page 2) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/lapic.c Page 2) 166.0035 Tj
0 -28.4801 Td
(5700 void) 39.3166 Tj
0 -37.9735 Td
-(5701 lapic_init\(int c\)) 96.1073 Tj
+(5701 lapicinit\(int c\)) 91.7388 Tj
0 -47.4668 Td
(5702 {) 26.2111 Tj
0 -56.9602 Td
@@ -19153,7 +19298,7 @@ q
0 -85.4403 Td
(5706 // Enable local APIC; set spurious interrupt vector.) 257.7424 Tj
0 -94.9336 Td
-(5707 lapicw\(SVR, ENABLE | \(IRQ_OFFSET+IRQ_SPURIOUS\)\);) 240.2683 Tj
+(5707 lapicw\(SVR, ENABLE | \(T_IRQ0 + IRQ_SPURIOUS\)\);) 231.5313 Tj
0 -104.427 Td
(5708 ) 21.8426 Tj
0 -113.9203 Td
@@ -19168,7 +19313,7 @@ e.) 283.9534 Tj
0 -151.8938 Td
(5713 lapicw\(TDCR, X1\);) 104.8443 Tj
0 -161.3871 Td
-(5714 lapicw\(TIMER, PERIODIC | \(IRQ_OFFSET + IRQ_TIMER\)\);) 253.3738 Tj
+(5714 lapicw\(TIMER, PERIODIC | \(T_IRQ0 + IRQ_TIMER\)\);) 235.8998 Tj
0 -170.8805 Td
(5715 lapicw\(TICR, 10000000\);) 131.0554 Tj
0 -180.3739 Td
@@ -19194,7 +19339,7 @@ e.) 283.9534 Tj
0 -275.3075 Td
(5726 // Map error interrupt to IRQ_ERROR.) 187.8461 Tj
0 -284.8008 Td
-(5727 lapicw\(ERROR, IRQ_OFFSET+IRQ_ERROR\);) 187.8461 Tj
+(5727 lapicw\(ERROR, T_IRQ0 + IRQ_ERROR\);) 179.1091 Tj
0 -294.2942 Td
(5728 ) 21.8426 Tj
0 -303.7875 Td
@@ -19260,7 +19405,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/lapic.c Page 3) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/lapic.c Page 3) 166.0035 Tj
0 -28.4801 Td
(5750 int) 34.9481 Tj
0 -37.9735 Td
@@ -19275,12 +19420,12 @@ q
(5755 // Would prefer to panic but even printing is chancy her\
e:) 283.9534 Tj
0 -85.4403 Td
-(5756 // everything, including cprintf, calls cpu, at least in\
-directly) 310.1645 Tj
+(5756 // almost everything, including cprintf and panic, calls\
+ cpu,) 297.059 Tj
0 -94.9336 Td
-(5757 // through acquire and release.) 166.0035 Tj
+(5757 // often indirectly through acquire and release.) 240.2683 Tj
0 -104.427 Td
-(5758 if\(read_eflags\(\)&FL_IF\){) 135.4239 Tj
+(5758 if\(readeflags\(\)&FL_IF\){) 131.0554 Tj
0 -113.9203 Td
(5759 static int n;) 96.1073 Tj
0 -123.4137 Td
@@ -19289,7 +19434,7 @@ directly) 310.1645 Tj
(5761 cprintf\("cpu called from %x with interrupts enabled\
\\n",) 288.322 Tj
0 -142.4004 Td
-(5762 \(\(uint*\)read_ebp\(\)\)[1]\);) 161.635 Tj
+(5762 __builtin_return_address\(0\)\);) 183.4776 Tj
0 -151.8938 Td
(5763 }) 34.9481 Tj
0 -161.3871 Td
@@ -19309,7 +19454,7 @@ directly) 310.1645 Tj
0 -227.8407 Td
(5771 void) 39.3166 Tj
0 -237.334 Td
-(5772 lapic_eoi\(void\)) 87.3703 Tj
+(5772 lapiceoi\(void\)) 83.0018 Tj
0 -246.8274 Td
(5773 {) 26.2111 Tj
0 -256.3207 Td
@@ -19325,7 +19470,7 @@ directly) 310.1645 Tj
0 -303.7875 Td
(5779 // On real hardware would want to tune this dynamically.) 266.4794 Tj
0 -313.2809 Td
-(5780 static void) 69.8962 Tj
+(5780 void) 39.3166 Tj
0 -322.7743 Td
(5781 microdelay\(int us\)) 100.4758 Tj
0 -332.2676 Td
@@ -19394,6 +19539,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -19411,7 +19558,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/lapic.c Page 4) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/lapic.c Page 4) 166.0035 Tj
0 -28.4801 Td
(5800 #define IO_RTC 0x70) 109.2129 Tj
0 -37.9735 Td
@@ -19424,7 +19571,7 @@ dr.) 288.322 Tj
0 -66.4535 Td
(5804 void) 39.3166 Tj
0 -75.9469 Td
-(5805 lapic_startap\(uchar apicid, uint addr\)) 187.8461 Tj
+(5805 lapicstartap\(uchar apicid, uint addr\)) 183.4776 Tj
0 -85.4403 Td
(5806 {) 26.2111 Tj
0 -94.9336 Td
@@ -19468,9 +19615,8 @@ r CPU.) 292.6905 Tj
0 -256.3207 Td
(5824 lapicw\(ICRLO, INIT | LEVEL\);) 152.898 Tj
0 -265.8141 Td
-(5825 microdelay\(100\);) 100.4758 Tj
--500.868 TJm
-(// should be 10ms, but too slow in Bochs!) 179.1091 Tj
+(5825 microdelay\(100\); // should be 10ms, but too slow in\
+ Bochs!) 297.059 Tj
0 -275.3075 Td
(5826 ) 21.8426 Tj
0 -284.8008 Td
@@ -19540,7 +19686,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/ioapic.c Page 1) 170.3721 Tj
+(Aug 8 01:04 2009 xv6/ioapic.c Page 1) 170.3721 Tj
0 -28.4801 Td
(5850 // The I/O APIC manages hardware interrupts for an SMP sys\
tem.) 292.6905 Tj
@@ -19619,7 +19765,7 @@ ata.) 292.6905 Tj
0 -341.761 Td
(5883 static uint) 69.8962 Tj
0 -351.2543 Td
-(5884 ioapic_read\(int reg\)) 109.2129 Tj
+(5884 ioapicread\(int reg\)) 104.8443 Tj
0 -360.7477 Td
(5885 {) 26.2111 Tj
0 -370.2411 Td
@@ -19633,7 +19779,7 @@ ata.) 292.6905 Tj
0 -408.2145 Td
(5890 static void) 69.8962 Tj
0 -417.7079 Td
-(5891 ioapic_write\(int reg, uint data\)) 161.635 Tj
+(5891 ioapicwrite\(int reg, uint data\)) 157.2665 Tj
0 -427.2012 Td
(5892 {) 26.2111 Tj
0 -436.6946 Td
@@ -19680,6 +19826,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -19697,11 +19845,11 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/ioapic.c Page 2) 170.3721 Tj
+(Aug 8 01:04 2009 xv6/ioapic.c Page 2) 170.3721 Tj
0 -28.4801 Td
(5900 void) 39.3166 Tj
0 -37.9735 Td
-(5901 ioapic_init\(void\)) 96.1073 Tj
+(5901 ioapicinit\(void\)) 91.7388 Tj
0 -47.4668 Td
(5902 {) 26.2111 Tj
0 -56.9602 Td
@@ -19717,14 +19865,14 @@ q
0 -104.427 Td
(5908 ioapic = \(volatile struct ioapic*\)IOAPIC;) 209.6887 Tj
0 -113.9203 Td
-(5909 maxintr = \(ioapic_read\(REG_VER\) >> 16\) & 0xFF;) 231.5313 Tj
+(5909 maxintr = \(ioapicread\(REG_VER\) >> 16\) & 0xFF;) 227.1628 Tj
0 -123.4137 Td
-(5910 id = ioapic_read\(REG_ID\) >> 24;) 166.0035 Tj
+(5910 id = ioapicread\(REG_ID\) >> 24;) 161.635 Tj
0 -132.9071 Td
-(5911 if\(id != ioapic_id\)) 113.5814 Tj
+(5911 if\(id != ioapicid\)) 109.2129 Tj
0 -142.4004 Td
-(5912 cprintf\("ioapic_init: id isn't equal to ioapic_id; no\
-t a MP\\n"\);) 318.9016 Tj
+(5912 cprintf\("ioapicinit: id isn't equal to ioapicid; not \
+a MP\\n"\);) 310.1645 Tj
0 -151.8938 Td
(5913 ) 21.8426 Tj
0 -161.3871 Td
@@ -19735,10 +19883,10 @@ bled,) 297.059 Tj
0 -180.3739 Td
(5916 for\(i = 0; i <= maxintr; i++\){) 161.635 Tj
0 -189.8672 Td
-(5917 ioapic_write\(REG_TABLE+2*i, INT_DISABLED | \(IRQ_OFFS\
-ET + i\)\);) 305.796 Tj
+(5917 ioapicwrite\(REG_TABLE+2*i, INT_DISABLED | \(T_IRQ0 + \
+i\)\);) 283.9534 Tj
0 -199.3606 Td
-(5918 ioapic_write\(REG_TABLE+2*i+1, 0\);) 183.4776 Tj
+(5918 ioapicwrite\(REG_TABLE+2*i+1, 0\);) 179.1091 Tj
0 -208.8539 Td
(5919 }) 34.9481 Tj
0 -218.3473 Td
@@ -19748,7 +19896,7 @@ ET + i\)\);) 305.796 Tj
0 -237.334 Td
(5922 void) 39.3166 Tj
0 -246.8274 Td
-(5923 ioapic_enable\(int irq, int cpunum\)) 170.3721 Tj
+(5923 ioapicenable\(int irq, int cpunum\)) 166.0035 Tj
0 -256.3207 Td
(5924 {) 26.2111 Tj
0 -265.8141 Td
@@ -19764,9 +19912,9 @@ ET + i\)\);) 305.796 Tj
0 -313.2809 Td
(5930 // which happens to be that cpu's APIC ID.) 214.0572 Tj
0 -322.7743 Td
-(5931 ioapic_write\(REG_TABLE+2*irq, IRQ_OFFSET + irq\);) 240.2683 Tj
+(5931 ioapicwrite\(REG_TABLE+2*irq, T_IRQ0 + irq\);) 218.4257 Tj
0 -332.2676 Td
-(5932 ioapic_write\(REG_TABLE+2*irq+1, cpunum << 24\);) 231.5313 Tj
+(5932 ioapicwrite\(REG_TABLE+2*irq+1, cpunum << 24\);) 227.1628 Tj
0 -341.761 Td
(5933 }) 26.2111 Tj
0 -351.2543 Td
@@ -19819,7 +19967,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/picirq.c Page 1) 170.3721 Tj
+(Aug 8 01:04 2009 xv6/picirq.c Page 1) 170.3721 Tj
0 -28.4801 Td
(5950 // Intel 8259A programmable interrupt controllers.) 240.2683 Tj
0 -37.9735 Td
@@ -19858,7 +20006,7 @@ ects to master) 336.3756 Tj
0 -180.3739 Td
(5966 static void) 69.8962 Tj
0 -189.8672 Td
-(5967 pic_setmask\(ushort mask\)) 126.6869 Tj
+(5967 picsetmask\(ushort mask\)) 122.3184 Tj
0 -199.3606 Td
(5968 {) 26.2111 Tj
0 -208.8539 Td
@@ -19874,11 +20022,11 @@ ects to master) 336.3756 Tj
0 -256.3207 Td
(5974 void) 39.3166 Tj
0 -265.8141 Td
-(5975 pic_enable\(int irq\)) 104.8443 Tj
+(5975 picenable\(int irq\)) 100.4758 Tj
0 -275.3075 Td
(5976 {) 26.2111 Tj
0 -284.8008 Td
-(5977 pic_setmask\(irqmask & ~\(1<<irq\)\);) 174.7406 Tj
+(5977 picsetmask\(irqmask & ~\(1<<irq\)\);) 170.3721 Tj
0 -294.2942 Td
(5978 }) 26.2111 Tj
0 -303.7875 Td
@@ -19888,7 +20036,7 @@ ects to master) 336.3756 Tj
0 -322.7743 Td
(5981 void) 39.3166 Tj
0 -332.2676 Td
-(5982 pic_init\(void\)) 83.0018 Tj
+(5982 picinit\(void\)) 78.6333 Tj
0 -341.761 Td
(5983 {) 26.2111 Tj
0 -351.2543 Td
@@ -19918,7 +20066,7 @@ ects to master) 336.3756 Tj
0 -465.1747 Td
(5996 // ICW2: Vector offset) 131.0554 Tj
0 -474.668 Td
-(5997 outb\(IO_PIC1+1, IRQ_OFFSET\);) 152.898 Tj
+(5997 outb\(IO_PIC1+1, T_IRQ0\);) 135.4239 Tj
0 -484.1614 Td
(5998 ) 21.8426 Tj
0 -493.6547 Td
@@ -19953,6 +20101,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -19970,7 +20120,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/picirq.c Page 2) 170.3721 Tj
+(Aug 8 01:04 2009 xv6/picirq.c Page 2) 170.3721 Tj
0 -28.4801 Td
(6000 // ICW3: \(master PIC\) bit mask of IR lines connected \
to slaves) 305.796 Tj
@@ -20006,7 +20156,7 @@ to slaves) 305.796 Tj
0 -170.8805 Td
(6015 outb\(IO_PIC2, 0x11\); // ICW1) 227.1628 Tj
0 -180.3739 Td
-(6016 outb\(IO_PIC2+1, IRQ_OFFSET + 8\); // ICW2) 227.1628 Tj
+(6016 outb\(IO_PIC2+1, T_IRQ0 + 8\); // ICW2) 209.6887 Tj
0 -189.8672 Td
(6017 outb\(IO_PIC2+1, IRQ_SLAVE\); // ICW3) 227.1628 Tj
0 -199.3606 Td
@@ -20044,7 +20194,7 @@ t) 270.8479 Tj
0 -332.2676 Td
(6032 if\(irqmask != 0xFFFF\)) 122.3184 Tj
0 -341.761 Td
-(6033 pic_setmask\(irqmask\);) 131.0554 Tj
+(6033 picsetmask\(irqmask\);) 126.6869 Tj
0 -351.2543 Td
(6034 }) 26.2111 Tj
0 -360.7477 Td
@@ -20095,106 +20245,105 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/kbd.h Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/picirq.c Page 3) 170.3721 Tj
0 -28.4801 Td
-(6050 // PC keyboard interface constants) 170.3721 Tj
+(6050 // Blank page.) 83.0018 Tj
0 -37.9735 Td
(6051 ) 21.8426 Tj
0 -47.4668 Td
-(6052 #define KBSTATP 0x64 // kbd controller status p\
-ort\(I\)) 301.4275 Tj
+(6052 ) 21.8426 Tj
0 -56.9602 Td
-(6053 #define KBS_DIB 0x01 // kbd data in buffer) 253.3738 Tj
+(6053 ) 21.8426 Tj
0 -66.4535 Td
-(6054 #define KBDATAP 0x60 // kbd data port\(I\)) 244.6368 Tj
+(6054 ) 21.8426 Tj
0 -75.9469 Td
(6055 ) 21.8426 Tj
0 -85.4403 Td
-(6056 #define NO 0) 131.0554 Tj
+(6056 ) 21.8426 Tj
0 -94.9336 Td
(6057 ) 21.8426 Tj
0 -104.427 Td
-(6058 #define SHIFT \(1<<0\)) 152.898 Tj
+(6058 ) 21.8426 Tj
0 -113.9203 Td
-(6059 #define CTL \(1<<1\)) 152.898 Tj
+(6059 ) 21.8426 Tj
0 -123.4137 Td
-(6060 #define ALT \(1<<2\)) 152.898 Tj
+(6060 ) 21.8426 Tj
0 -132.9071 Td
(6061 ) 21.8426 Tj
0 -142.4004 Td
-(6062 #define CAPSLOCK \(1<<3\)) 152.898 Tj
+(6062 ) 21.8426 Tj
0 -151.8938 Td
-(6063 #define NUMLOCK \(1<<4\)) 152.898 Tj
+(6063 ) 21.8426 Tj
0 -161.3871 Td
-(6064 #define SCROLLLOCK \(1<<5\)) 152.898 Tj
+(6064 ) 21.8426 Tj
0 -170.8805 Td
(6065 ) 21.8426 Tj
0 -180.3739 Td
-(6066 #define E0ESC \(1<<6\)) 152.898 Tj
+(6066 ) 21.8426 Tj
0 -189.8672 Td
(6067 ) 21.8426 Tj
0 -199.3606 Td
-(6068 // Special keycodes) 104.8443 Tj
+(6068 ) 21.8426 Tj
0 -208.8539 Td
-(6069 #define KEY_HOME 0xE0) 144.161 Tj
+(6069 ) 21.8426 Tj
0 -218.3473 Td
-(6070 #define KEY_END 0xE1) 144.161 Tj
+(6070 ) 21.8426 Tj
0 -227.8407 Td
-(6071 #define KEY_UP 0xE2) 144.161 Tj
+(6071 ) 21.8426 Tj
0 -237.334 Td
-(6072 #define KEY_DN 0xE3) 144.161 Tj
+(6072 ) 21.8426 Tj
0 -246.8274 Td
-(6073 #define KEY_LF 0xE4) 144.161 Tj
+(6073 ) 21.8426 Tj
0 -256.3207 Td
-(6074 #define KEY_RT 0xE5) 144.161 Tj
+(6074 ) 21.8426 Tj
0 -265.8141 Td
-(6075 #define KEY_PGUP 0xE6) 144.161 Tj
+(6075 ) 21.8426 Tj
0 -275.3075 Td
-(6076 #define KEY_PGDN 0xE7) 144.161 Tj
+(6076 ) 21.8426 Tj
0 -284.8008 Td
-(6077 #define KEY_INS 0xE8) 144.161 Tj
+(6077 ) 21.8426 Tj
0 -294.2942 Td
-(6078 #define KEY_DEL 0xE9) 144.161 Tj
+(6078 ) 21.8426 Tj
0 -303.7875 Td
(6079 ) 21.8426 Tj
0 -313.2809 Td
-(6080 // C\('A'\) == Control-A) 117.9499 Tj
+(6080 ) 21.8426 Tj
0 -322.7743 Td
-(6081 #define C\(x\) \(x - '@'\)) 117.9499 Tj
+(6081 ) 21.8426 Tj
0 -332.2676 Td
(6082 ) 21.8426 Tj
0 -341.761 Td
-(6083 static uchar shiftcode[256] =) 148.5295 Tj
+(6083 ) 21.8426 Tj
0 -351.2543 Td
-(6084 {) 26.2111 Tj
+(6084 ) 21.8426 Tj
0 -360.7477 Td
-(6085 [0x1D] CTL,) 78.6333 Tj
+(6085 ) 21.8426 Tj
0 -370.2411 Td
-(6086 [0x2A] SHIFT,) 87.3703 Tj
+(6086 ) 21.8426 Tj
0 -379.7344 Td
-(6087 [0x36] SHIFT,) 87.3703 Tj
+(6087 ) 21.8426 Tj
0 -389.2278 Td
-(6088 [0x38] ALT,) 78.6333 Tj
+(6088 ) 21.8426 Tj
0 -398.7211 Td
-(6089 [0x9D] CTL,) 78.6333 Tj
+(6089 ) 21.8426 Tj
0 -408.2145 Td
-(6090 [0xB8] ALT) 74.2647 Tj
+(6090 ) 21.8426 Tj
0 -417.7079 Td
-(6091 };) 30.5796 Tj
+(6091 ) 21.8426 Tj
0 -427.2012 Td
(6092 ) 21.8426 Tj
0 -436.6946 Td
-(6093 static uchar togglecode[256] =) 152.898 Tj
+(6093 ) 21.8426 Tj
0 -446.1879 Td
-(6094 {) 26.2111 Tj
+(6094 ) 21.8426 Tj
0 -455.6813 Td
-(6095 [0x3A] CAPSLOCK,) 100.4758 Tj
+(6095 ) 21.8426 Tj
0 -465.1747 Td
-(6096 [0x45] NUMLOCK,) 96.1073 Tj
+(6096 ) 21.8426 Tj
0 -474.668 Td
-(6097 [0x46] SCROLLLOCK) 104.8443 Tj
+(6097 ) 21.8426 Tj
0 -484.1614 Td
-(6098 };) 30.5796 Tj
+(6098 ) 21.8426 Tj
0 -493.6547 Td
(6099 ) 21.8426 Tj
0 -522.1348 Td
@@ -20227,6 +20376,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -20244,105 +20395,106 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/kbd.h Page 2) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/kbd.h Page 1) 157.2665 Tj
0 -28.4801 Td
-(6100 static uchar normalmap[256] =) 148.5295 Tj
+(6100 // PC keyboard interface constants) 170.3721 Tj
0 -37.9735 Td
-(6101 {) 26.2111 Tj
+(6101 ) 21.8426 Tj
0 -47.4668 Td
-(6102 NO, 0x1B, '1', '2', '3', '4', '5', '6', // 0x00) 270.8479 Tj
+(6102 #define KBSTATP 0x64 // kbd controller status p\
+ort\(I\)) 301.4275 Tj
0 -56.9602 Td
-(6103 '7', '8', '9', '0', '-', '=', '\\b', '\\t',) 235.8998 Tj
+(6103 #define KBS_DIB 0x01 // kbd data in buffer) 253.3738 Tj
0 -66.4535 Td
-(6104 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', // 0x10) 270.8479 Tj
+(6104 #define KBDATAP 0x60 // kbd data port\(I\)) 244.6368 Tj
0 -75.9469 Td
-(6105 'o', 'p', '[', ']', '\\n', NO, 'a', 's',) 231.5313 Tj
+(6105 ) 21.8426 Tj
0 -85.4403 Td
-(6106 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', // 0x20) 270.8479 Tj
+(6106 #define NO 0) 131.0554 Tj
0 -94.9336 Td
-(6107 '\\'', '`', NO, '\\\\', 'z', 'x', 'c', 'v',) 231.5313 Tj
+(6107 ) 21.8426 Tj
0 -104.427 Td
-(6108 'b', 'n', 'm', ',', '.', '/', NO, '*', // 0x30) 270.8479 Tj
+(6108 #define SHIFT \(1<<0\)) 152.898 Tj
0 -113.9203 Td
-(6109 NO, ' ', NO, NO, NO, NO, NO, NO,) 227.1628 Tj
+(6109 #define CTL \(1<<1\)) 152.898 Tj
0 -123.4137 Td
-(6110 NO, NO, NO, NO, NO, NO, NO, '7', // 0x40) 270.8479 Tj
+(6110 #define ALT \(1<<2\)) 152.898 Tj
0 -132.9071 Td
-(6111 '8', '9', '-', '4', '5', '6', '+', '1',) 231.5313 Tj
+(6111 ) 21.8426 Tj
0 -142.4004 Td
-(6112 '2', '3', '0', '.', NO, NO, NO, NO, // 0x50) 270.8479 Tj
+(6112 #define CAPSLOCK \(1<<3\)) 152.898 Tj
0 -151.8938 Td
-(6113 [0x9C] '\\n', // KP_Enter) 157.2665 Tj
+(6113 #define NUMLOCK \(1<<4\)) 152.898 Tj
0 -161.3871 Td
-(6114 [0xB5] '/', // KP_Div) 148.5295 Tj
+(6114 #define SCROLLLOCK \(1<<5\)) 152.898 Tj
0 -170.8805 Td
-(6115 [0xC8] KEY_UP, [0xD0] KEY_DN,) 170.3721 Tj
+(6115 ) 21.8426 Tj
0 -180.3739 Td
-(6116 [0xC9] KEY_PGUP, [0xD1] KEY_PGDN,) 179.1091 Tj
+(6116 #define E0ESC \(1<<6\)) 152.898 Tj
0 -189.8672 Td
-(6117 [0xCB] KEY_LF, [0xCD] KEY_RT,) 170.3721 Tj
+(6117 ) 21.8426 Tj
0 -199.3606 Td
-(6118 [0x97] KEY_HOME, [0xCF] KEY_END,) 174.7406 Tj
+(6118 // Special keycodes) 104.8443 Tj
0 -208.8539 Td
-(6119 [0xD2] KEY_INS, [0xD3] KEY_DEL) 170.3721 Tj
+(6119 #define KEY_HOME 0xE0) 144.161 Tj
0 -218.3473 Td
-(6120 };) 30.5796 Tj
+(6120 #define KEY_END 0xE1) 144.161 Tj
0 -227.8407 Td
-(6121 ) 21.8426 Tj
+(6121 #define KEY_UP 0xE2) 144.161 Tj
0 -237.334 Td
-(6122 static uchar shiftmap[256] =) 144.161 Tj
+(6122 #define KEY_DN 0xE3) 144.161 Tj
0 -246.8274 Td
-(6123 {) 26.2111 Tj
+(6123 #define KEY_LF 0xE4) 144.161 Tj
0 -256.3207 Td
-(6124 NO, 033, '!', '@', '#', '$', '%', '^', // 0x00) 270.8479 Tj
+(6124 #define KEY_RT 0xE5) 144.161 Tj
0 -265.8141 Td
-(6125 '&', '*', '\(', '\)', '_', '+', '\\b', '\\t',) 235.8998 Tj
+(6125 #define KEY_PGUP 0xE6) 144.161 Tj
0 -275.3075 Td
-(6126 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', // 0x10) 270.8479 Tj
+(6126 #define KEY_PGDN 0xE7) 144.161 Tj
0 -284.8008 Td
-(6127 'O', 'P', '{', '}', '\\n', NO, 'A', 'S',) 231.5313 Tj
+(6127 #define KEY_INS 0xE8) 144.161 Tj
0 -294.2942 Td
-(6128 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', // 0x20) 270.8479 Tj
+(6128 #define KEY_DEL 0xE9) 144.161 Tj
0 -303.7875 Td
-(6129 '"', '~', NO, '|', 'Z', 'X', 'C', 'V',) 231.5313 Tj
+(6129 ) 21.8426 Tj
0 -313.2809 Td
-(6130 'B', 'N', 'M', '<', '>', '?', NO, '*', // 0x30) 270.8479 Tj
+(6130 // C\('A'\) == Control-A) 117.9499 Tj
0 -322.7743 Td
-(6131 NO, ' ', NO, NO, NO, NO, NO, NO,) 227.1628 Tj
+(6131 #define C\(x\) \(x - '@'\)) 117.9499 Tj
0 -332.2676 Td
-(6132 NO, NO, NO, NO, NO, NO, NO, '7', // 0x40) 270.8479 Tj
+(6132 ) 21.8426 Tj
0 -341.761 Td
-(6133 '8', '9', '-', '4', '5', '6', '+', '1',) 231.5313 Tj
+(6133 static uchar shiftcode[256] =) 148.5295 Tj
0 -351.2543 Td
-(6134 '2', '3', '0', '.', NO, NO, NO, NO, // 0x50) 270.8479 Tj
+(6134 {) 26.2111 Tj
0 -360.7477 Td
-(6135 [0x9C] '\\n', // KP_Enter) 157.2665 Tj
+(6135 [0x1D] CTL,) 78.6333 Tj
0 -370.2411 Td
-(6136 [0xB5] '/', // KP_Div) 148.5295 Tj
+(6136 [0x2A] SHIFT,) 87.3703 Tj
0 -379.7344 Td
-(6137 [0xC8] KEY_UP, [0xD0] KEY_DN,) 170.3721 Tj
+(6137 [0x36] SHIFT,) 87.3703 Tj
0 -389.2278 Td
-(6138 [0xC9] KEY_PGUP, [0xD1] KEY_PGDN,) 179.1091 Tj
+(6138 [0x38] ALT,) 78.6333 Tj
0 -398.7211 Td
-(6139 [0xCB] KEY_LF, [0xCD] KEY_RT,) 170.3721 Tj
+(6139 [0x9D] CTL,) 78.6333 Tj
0 -408.2145 Td
-(6140 [0x97] KEY_HOME, [0xCF] KEY_END,) 174.7406 Tj
+(6140 [0xB8] ALT) 74.2647 Tj
0 -417.7079 Td
-(6141 [0xD2] KEY_INS, [0xD3] KEY_DEL) 170.3721 Tj
+(6141 };) 30.5796 Tj
0 -427.2012 Td
-(6142 };) 30.5796 Tj
+(6142 ) 21.8426 Tj
0 -436.6946 Td
-(6143 ) 21.8426 Tj
+(6143 static uchar togglecode[256] =) 152.898 Tj
0 -446.1879 Td
-(6144 ) 21.8426 Tj
+(6144 {) 26.2111 Tj
0 -455.6813 Td
-(6145 ) 21.8426 Tj
+(6145 [0x3A] CAPSLOCK,) 100.4758 Tj
0 -465.1747 Td
-(6146 ) 21.8426 Tj
+(6146 [0x45] NUMLOCK,) 96.1073 Tj
0 -474.668 Td
-(6147 ) 21.8426 Tj
+(6147 [0x46] SCROLLLOCK) 104.8443 Tj
0 -484.1614 Td
-(6148 ) 21.8426 Tj
+(6148 };) 30.5796 Tj
0 -493.6547 Td
(6149 ) 21.8426 Tj
0 -522.1348 Td
@@ -20363,100 +20515,93 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/kbd.h Page 3) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/kbd.h Page 2) 157.2665 Tj
0 -28.4801 Td
-(6150 static uchar ctlmap[256] =) 135.4239 Tj
+(6150 static uchar normalmap[256] =) 148.5295 Tj
0 -37.9735 Td
(6151 {) 26.2111 Tj
0 -47.4668 Td
-(6152 NO, NO, NO, NO, NO, NO, NO\
-, NO,) 318.9016 Tj
+(6152 NO, 0x1B, '1', '2', '3', '4', '5', '6', // 0x00) 270.8479 Tj
0 -56.9602 Td
-(6153 NO, NO, NO, NO, NO, NO, NO\
-, NO,) 318.9016 Tj
+(6153 '7', '8', '9', '0', '-', '=', '\\b', '\\t',) 235.8998 Tj
0 -66.4535 Td
-(6154 C\('Q'\), C\('W'\), C\('E'\), C\('R'\), C\('T'\), C\
-\('Y'\), C\('U'\), C\('I'\),) 336.3756 Tj
+(6154 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', // 0x10) 270.8479 Tj
0 -75.9469 Td
-(6155 C\('O'\), C\('P'\), NO, NO, '\\r', NO, \
- C\('A'\), C\('S'\),) 336.3756 Tj
+(6155 'o', 'p', '[', ']', '\\n', NO, 'a', 's',) 231.5313 Tj
0 -85.4403 Td
-(6156 C\('D'\), C\('F'\), C\('G'\), C\('H'\), C\('J'\), C\
-\('K'\), C\('L'\), NO,) 318.9016 Tj
+(6156 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', // 0x20) 270.8479 Tj
0 -94.9336 Td
-(6157 NO, NO, NO, C\('\\\\'\), C\('Z'\), C\('X\
-'\), C\('C'\), C\('V'\),) 336.3756 Tj
+(6157 '\\'', '`', NO, '\\\\', 'z', 'x', 'c', 'v',) 231.5313 Tj
0 -104.427 Td
-(6158 C\('B'\), C\('N'\), C\('M'\), NO, NO, C\('/\
-'\), NO, NO,) 318.9016 Tj
+(6158 'b', 'n', 'm', ',', '.', '/', NO, '*', // 0x30) 270.8479 Tj
0 -113.9203 Td
-(6159 [0x9C] '\\r', // KP_Enter) 157.2665 Tj
+(6159 NO, ' ', NO, NO, NO, NO, NO, NO,) 227.1628 Tj
0 -123.4137 Td
-(6160 [0xB5] C\('/'\), // KP_Div) 148.5295 Tj
+(6160 NO, NO, NO, NO, NO, NO, NO, '7', // 0x40) 270.8479 Tj
0 -132.9071 Td
-(6161 [0xC8] KEY_UP, [0xD0] KEY_DN,) 170.3721 Tj
+(6161 '8', '9', '-', '4', '5', '6', '+', '1',) 231.5313 Tj
0 -142.4004 Td
-(6162 [0xC9] KEY_PGUP, [0xD1] KEY_PGDN,) 179.1091 Tj
+(6162 '2', '3', '0', '.', NO, NO, NO, NO, // 0x50) 270.8479 Tj
0 -151.8938 Td
-(6163 [0xCB] KEY_LF, [0xCD] KEY_RT,) 170.3721 Tj
+(6163 [0x9C] '\\n', // KP_Enter) 157.2665 Tj
0 -161.3871 Td
-(6164 [0x97] KEY_HOME, [0xCF] KEY_END,) 174.7406 Tj
+(6164 [0xB5] '/', // KP_Div) 148.5295 Tj
0 -170.8805 Td
-(6165 [0xD2] KEY_INS, [0xD3] KEY_DEL) 170.3721 Tj
+(6165 [0xC8] KEY_UP, [0xD0] KEY_DN,) 170.3721 Tj
0 -180.3739 Td
-(6166 };) 30.5796 Tj
+(6166 [0xC9] KEY_PGUP, [0xD1] KEY_PGDN,) 179.1091 Tj
0 -189.8672 Td
-(6167 ) 21.8426 Tj
+(6167 [0xCB] KEY_LF, [0xCD] KEY_RT,) 170.3721 Tj
0 -199.3606 Td
-(6168 ) 21.8426 Tj
+(6168 [0x97] KEY_HOME, [0xCF] KEY_END,) 174.7406 Tj
0 -208.8539 Td
-(6169 ) 21.8426 Tj
+(6169 [0xD2] KEY_INS, [0xD3] KEY_DEL) 170.3721 Tj
0 -218.3473 Td
-(6170 ) 21.8426 Tj
+(6170 };) 30.5796 Tj
0 -227.8407 Td
(6171 ) 21.8426 Tj
0 -237.334 Td
-(6172 ) 21.8426 Tj
+(6172 static uchar shiftmap[256] =) 144.161 Tj
0 -246.8274 Td
-(6173 ) 21.8426 Tj
+(6173 {) 26.2111 Tj
0 -256.3207 Td
-(6174 ) 21.8426 Tj
+(6174 NO, 033, '!', '@', '#', '$', '%', '^', // 0x00) 270.8479 Tj
0 -265.8141 Td
-(6175 ) 21.8426 Tj
+(6175 '&', '*', '\(', '\)', '_', '+', '\\b', '\\t',) 235.8998 Tj
0 -275.3075 Td
-(6176 ) 21.8426 Tj
+(6176 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', // 0x10) 270.8479 Tj
0 -284.8008 Td
-(6177 ) 21.8426 Tj
+(6177 'O', 'P', '{', '}', '\\n', NO, 'A', 'S',) 231.5313 Tj
0 -294.2942 Td
-(6178 ) 21.8426 Tj
+(6178 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', // 0x20) 270.8479 Tj
0 -303.7875 Td
-(6179 ) 21.8426 Tj
+(6179 '"', '~', NO, '|', 'Z', 'X', 'C', 'V',) 231.5313 Tj
0 -313.2809 Td
-(6180 ) 21.8426 Tj
+(6180 'B', 'N', 'M', '<', '>', '?', NO, '*', // 0x30) 270.8479 Tj
0 -322.7743 Td
-(6181 ) 21.8426 Tj
+(6181 NO, ' ', NO, NO, NO, NO, NO, NO,) 227.1628 Tj
0 -332.2676 Td
-(6182 ) 21.8426 Tj
+(6182 NO, NO, NO, NO, NO, NO, NO, '7', // 0x40) 270.8479 Tj
0 -341.761 Td
-(6183 ) 21.8426 Tj
+(6183 '8', '9', '-', '4', '5', '6', '+', '1',) 231.5313 Tj
0 -351.2543 Td
-(6184 ) 21.8426 Tj
+(6184 '2', '3', '0', '.', NO, NO, NO, NO, // 0x50) 270.8479 Tj
0 -360.7477 Td
-(6185 ) 21.8426 Tj
+(6185 [0x9C] '\\n', // KP_Enter) 157.2665 Tj
0 -370.2411 Td
-(6186 ) 21.8426 Tj
+(6186 [0xB5] '/', // KP_Div) 148.5295 Tj
0 -379.7344 Td
-(6187 ) 21.8426 Tj
+(6187 [0xC8] KEY_UP, [0xD0] KEY_DN,) 170.3721 Tj
0 -389.2278 Td
-(6188 ) 21.8426 Tj
+(6188 [0xC9] KEY_PGUP, [0xD1] KEY_PGDN,) 179.1091 Tj
0 -398.7211 Td
-(6189 ) 21.8426 Tj
+(6189 [0xCB] KEY_LF, [0xCD] KEY_RT,) 170.3721 Tj
0 -408.2145 Td
-(6190 ) 21.8426 Tj
+(6190 [0x97] KEY_HOME, [0xCF] KEY_END,) 174.7406 Tj
0 -417.7079 Td
-(6191 ) 21.8426 Tj
+(6191 [0xD2] KEY_INS, [0xD3] KEY_DEL) 170.3721 Tj
0 -427.2012 Td
-(6192 ) 21.8426 Tj
+(6192 };) 30.5796 Tj
0 -436.6946 Td
(6193 ) 21.8426 Tj
0 -446.1879 Td
@@ -20501,6 +20646,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -20518,107 +20665,114 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/kbd.c Page 1) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/kbd.h Page 3) 157.2665 Tj
0 -28.4801 Td
-(6200 #include "types.h") 100.4758 Tj
+(6200 static uchar ctlmap[256] =) 135.4239 Tj
0 -37.9735 Td
-(6201 #include "x86.h") 91.7388 Tj
+(6201 {) 26.2111 Tj
0 -47.4668 Td
-(6202 #include "defs.h") 96.1073 Tj
+(6202 NO, NO, NO, NO, NO, NO, NO\
+, NO,) 318.9016 Tj
0 -56.9602 Td
-(6203 #include "kbd.h") 91.7388 Tj
+(6203 NO, NO, NO, NO, NO, NO, NO\
+, NO,) 318.9016 Tj
0 -66.4535 Td
-(6204 ) 21.8426 Tj
+(6204 C\('Q'\), C\('W'\), C\('E'\), C\('R'\), C\('T'\), C\
+\('Y'\), C\('U'\), C\('I'\),) 336.3756 Tj
0 -75.9469 Td
-(6205 int) 34.9481 Tj
+(6205 C\('O'\), C\('P'\), NO, NO, '\\r', NO, \
+ C\('A'\), C\('S'\),) 336.3756 Tj
0 -85.4403 Td
-(6206 kbd_getc\(void\)) 83.0018 Tj
+(6206 C\('D'\), C\('F'\), C\('G'\), C\('H'\), C\('J'\), C\
+\('K'\), C\('L'\), NO,) 318.9016 Tj
0 -94.9336 Td
-(6207 {) 26.2111 Tj
+(6207 NO, NO, NO, C\('\\\\'\), C\('Z'\), C\('X\
+'\), C\('C'\), C\('V'\),) 336.3756 Tj
0 -104.427 Td
-(6208 static uint shift;) 109.2129 Tj
+(6208 C\('B'\), C\('N'\), C\('M'\), NO, NO, C\('/\
+'\), NO, NO,) 318.9016 Tj
0 -113.9203 Td
-(6209 static uchar *charcode[4] = {) 157.2665 Tj
+(6209 [0x9C] '\\r', // KP_Enter) 157.2665 Tj
0 -123.4137 Td
-(6210 normalmap, shiftmap, ctlmap, ctlmap) 192.2146 Tj
+(6210 [0xB5] C\('/'\), // KP_Div) 148.5295 Tj
0 -132.9071 Td
-(6211 };) 39.3166 Tj
+(6211 [0xC8] KEY_UP, [0xD0] KEY_DN,) 170.3721 Tj
0 -142.4004 Td
-(6212 uint st, data, c;) 104.8443 Tj
+(6212 [0xC9] KEY_PGUP, [0xD1] KEY_PGDN,) 179.1091 Tj
0 -151.8938 Td
-(6213 ) 21.8426 Tj
+(6213 [0xCB] KEY_LF, [0xCD] KEY_RT,) 170.3721 Tj
0 -161.3871 Td
-(6214 st = inb\(KBSTATP\);) 109.2129 Tj
+(6214 [0x97] KEY_HOME, [0xCF] KEY_END,) 174.7406 Tj
0 -170.8805 Td
-(6215 if\(\(st & KBS_DIB\) == 0\)) 131.0554 Tj
+(6215 [0xD2] KEY_INS, [0xD3] KEY_DEL) 170.3721 Tj
0 -180.3739 Td
-(6216 return -1;) 83.0018 Tj
+(6216 };) 30.5796 Tj
0 -189.8672 Td
-(6217 data = inb\(KBDATAP\);) 117.9499 Tj
+(6217 ) 21.8426 Tj
0 -199.3606 Td
(6218 ) 21.8426 Tj
0 -208.8539 Td
-(6219 if\(data == 0xE0\){) 104.8443 Tj
+(6219 ) 21.8426 Tj
0 -218.3473 Td
-(6220 shift |= E0ESC;) 104.8443 Tj
+(6220 ) 21.8426 Tj
0 -227.8407 Td
-(6221 return 0;) 78.6333 Tj
+(6221 ) 21.8426 Tj
0 -237.334 Td
-(6222 } else if\(data & 0x80\){) 131.0554 Tj
+(6222 ) 21.8426 Tj
0 -246.8274 Td
-(6223 // Key released) 104.8443 Tj
+(6223 ) 21.8426 Tj
0 -256.3207 Td
-(6224 data = \(shift & E0ESC ? data : data & 0x7F\);) 231.5313 Tj
+(6224 ) 21.8426 Tj
0 -265.8141 Td
-(6225 shift &= ~\(shiftcode[data] | E0ESC\);) 196.5831 Tj
+(6225 ) 21.8426 Tj
0 -275.3075 Td
-(6226 return 0;) 78.6333 Tj
+(6226 ) 21.8426 Tj
0 -284.8008 Td
-(6227 } else if\(shift & E0ESC\){) 139.7925 Tj
+(6227 ) 21.8426 Tj
0 -294.2942 Td
-(6228 // Last character was an E0 escape; or with 0x80) 249.0053 Tj
+(6228 ) 21.8426 Tj
0 -303.7875 Td
-(6229 data |= 0x80;) 96.1073 Tj
+(6229 ) 21.8426 Tj
0 -313.2809 Td
-(6230 shift &= ~E0ESC;) 109.2129 Tj
+(6230 ) 21.8426 Tj
0 -322.7743 Td
-(6231 }) 34.9481 Tj
+(6231 ) 21.8426 Tj
0 -332.2676 Td
(6232 ) 21.8426 Tj
0 -341.761 Td
-(6233 shift |= shiftcode[data];) 139.7925 Tj
+(6233 ) 21.8426 Tj
0 -351.2543 Td
-(6234 shift ^= togglecode[data];) 144.161 Tj
+(6234 ) 21.8426 Tj
0 -360.7477 Td
-(6235 c = charcode[shift & \(CTL | SHIFT\)][data];) 214.0572 Tj
+(6235 ) 21.8426 Tj
0 -370.2411 Td
-(6236 if\(shift & CAPSLOCK\){) 122.3184 Tj
+(6236 ) 21.8426 Tj
0 -379.7344 Td
-(6237 if\('a' <= c && c <= 'z'\)) 144.161 Tj
+(6237 ) 21.8426 Tj
0 -389.2278 Td
-(6238 c += 'A' - 'a';) 113.5814 Tj
+(6238 ) 21.8426 Tj
0 -398.7211 Td
-(6239 else if\('A' <= c && c <= 'Z'\)) 166.0035 Tj
+(6239 ) 21.8426 Tj
0 -408.2145 Td
-(6240 c += 'a' - 'A';) 113.5814 Tj
+(6240 ) 21.8426 Tj
0 -417.7079 Td
-(6241 }) 34.9481 Tj
+(6241 ) 21.8426 Tj
0 -427.2012 Td
-(6242 return c;) 69.8962 Tj
+(6242 ) 21.8426 Tj
0 -436.6946 Td
-(6243 }) 26.2111 Tj
+(6243 ) 21.8426 Tj
0 -446.1879 Td
(6244 ) 21.8426 Tj
0 -455.6813 Td
-(6245 void) 39.3166 Tj
+(6245 ) 21.8426 Tj
0 -465.1747 Td
-(6246 kbd_intr\(void\)) 83.0018 Tj
+(6246 ) 21.8426 Tj
0 -474.668 Td
-(6247 {) 26.2111 Tj
+(6247 ) 21.8426 Tj
0 -484.1614 Td
-(6248 console_intr\(kbd_getc\);) 131.0554 Tj
+(6248 ) 21.8426 Tj
0 -493.6547 Td
-(6249 }) 26.2111 Tj
+(6249 ) 21.8426 Tj
0 -522.1348 Td
(Sheet 62) 34.9481 Tj
Q
@@ -20637,109 +20791,107 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/console.c Page 1) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/kbd.c Page 1) 157.2665 Tj
0 -28.4801 Td
-(6250 // Console input and output.) 144.161 Tj
+(6250 #include "types.h") 100.4758 Tj
0 -37.9735 Td
-(6251 // Input is from the keyboard only.) 174.7406 Tj
+(6251 #include "x86.h") 91.7388 Tj
0 -47.4668 Td
-(6252 // Output is written to the screen and the printer port.) 266.4794 Tj
+(6252 #include "defs.h") 96.1073 Tj
0 -56.9602 Td
-(6253 ) 21.8426 Tj
+(6253 #include "kbd.h") 91.7388 Tj
0 -66.4535 Td
-(6254 #include "types.h") 100.4758 Tj
+(6254 ) 21.8426 Tj
0 -75.9469 Td
-(6255 #include "defs.h") 96.1073 Tj
+(6255 int) 34.9481 Tj
0 -85.4403 Td
-(6256 #include "param.h") 100.4758 Tj
+(6256 kbdgetc\(void\)) 78.6333 Tj
0 -94.9336 Td
-(6257 #include "traps.h") 100.4758 Tj
+(6257 {) 26.2111 Tj
0 -104.427 Td
-(6258 #include "spinlock.h") 113.5814 Tj
+(6258 static uint shift;) 109.2129 Tj
0 -113.9203 Td
-(6259 #include "dev.h") 91.7388 Tj
+(6259 static uchar *charcode[4] = {) 157.2665 Tj
0 -123.4137 Td
-(6260 #include "mmu.h") 91.7388 Tj
+(6260 normalmap, shiftmap, ctlmap, ctlmap) 192.2146 Tj
0 -132.9071 Td
-(6261 #include "proc.h") 96.1073 Tj
+(6261 };) 39.3166 Tj
0 -142.4004 Td
-(6262 #include "x86.h") 91.7388 Tj
+(6262 uint st, data, c;) 104.8443 Tj
0 -151.8938 Td
(6263 ) 21.8426 Tj
0 -161.3871 Td
-(6264 #define CRTPORT 0x3d4) 113.5814 Tj
+(6264 st = inb\(KBSTATP\);) 109.2129 Tj
0 -170.8805 Td
-(6265 #define LPTPORT 0x378) 113.5814 Tj
+(6265 if\(\(st & KBS_DIB\) == 0\)) 131.0554 Tj
0 -180.3739 Td
-(6266 #define BACKSPACE 0x100) 122.3184 Tj
+(6266 return -1;) 83.0018 Tj
0 -189.8672 Td
-(6267 ) 21.8426 Tj
+(6267 data = inb\(KBDATAP\);) 117.9499 Tj
0 -199.3606 Td
-(6268 static ushort *crt = \(ushort*\)0xb8000; // CGA memory) 253.3738 Tj
+(6268 ) 21.8426 Tj
0 -208.8539 Td
-(6269 ) 21.8426 Tj
+(6269 if\(data == 0xE0\){) 104.8443 Tj
0 -218.3473 Td
-(6270 static struct spinlock console_lock;) 179.1091 Tj
+(6270 shift |= E0ESC;) 104.8443 Tj
0 -227.8407 Td
-(6271 int panicked = 0;) 96.1073 Tj
+(6271 return 0;) 78.6333 Tj
0 -237.334 Td
-(6272 int use_console_lock = 0;) 131.0554 Tj
+(6272 } else if\(data & 0x80\){) 131.0554 Tj
0 -246.8274 Td
-(6273 ) 21.8426 Tj
+(6273 // Key released) 104.8443 Tj
0 -256.3207 Td
-(6274 // Copy console output to parallel port, which you can tel\
-l) 279.5849 Tj
+(6274 data = \(shift & E0ESC ? data : data & 0x7F\);) 231.5313 Tj
0 -265.8141 Td
-(6275 // .bochsrc to copy to the stdout:) 170.3721 Tj
+(6275 shift &= ~\(shiftcode[data] | E0ESC\);) 196.5831 Tj
0 -275.3075 Td
-(6276 // parport1: enabled=1, file="/dev/stdout") 214.0572 Tj
+(6276 return 0;) 78.6333 Tj
0 -284.8008 Td
-(6277 static void) 69.8962 Tj
+(6277 } else if\(shift & E0ESC\){) 139.7925 Tj
0 -294.2942 Td
-(6278 lpt_putc\(int c\)) 87.3703 Tj
+(6278 // Last character was an E0 escape; or with 0x80) 249.0053 Tj
0 -303.7875 Td
-(6279 {) 26.2111 Tj
+(6279 data |= 0x80;) 96.1073 Tj
0 -313.2809 Td
-(6280 int i;) 56.7907 Tj
+(6280 shift &= ~E0ESC;) 109.2129 Tj
0 -322.7743 Td
-(6281 ) 21.8426 Tj
+(6281 }) 34.9481 Tj
0 -332.2676 Td
-(6282 for\(i = 0; !\(inb\(LPTPORT+1\) & 0x80\) && i < 12800; i\
-++\)) 266.4794 Tj
+(6282 ) 21.8426 Tj
0 -341.761 Td
-(6283 ;) 43.6851 Tj
+(6283 shift |= shiftcode[data];) 139.7925 Tj
0 -351.2543 Td
-(6284 if\(c == BACKSPACE\)) 109.2129 Tj
+(6284 shift ^= togglecode[data];) 144.161 Tj
0 -360.7477 Td
-(6285 c = '\\b';) 78.6333 Tj
+(6285 c = charcode[shift & \(CTL | SHIFT\)][data];) 214.0572 Tj
0 -370.2411 Td
-(6286 outb\(LPTPORT+0, c\);) 113.5814 Tj
+(6286 if\(shift & CAPSLOCK\){) 122.3184 Tj
0 -379.7344 Td
-(6287 outb\(LPTPORT+2, 0x08|0x04|0x01\);) 170.3721 Tj
+(6287 if\('a' <= c && c <= 'z'\)) 144.161 Tj
0 -389.2278 Td
-(6288 outb\(LPTPORT+2, 0x08\);) 126.6869 Tj
+(6288 c += 'A' - 'a';) 113.5814 Tj
0 -398.7211 Td
-(6289 }) 26.2111 Tj
+(6289 else if\('A' <= c && c <= 'Z'\)) 166.0035 Tj
0 -408.2145 Td
-(6290 ) 21.8426 Tj
+(6290 c += 'a' - 'A';) 113.5814 Tj
0 -417.7079 Td
-(6291 ) 21.8426 Tj
+(6291 }) 34.9481 Tj
0 -427.2012 Td
-(6292 ) 21.8426 Tj
+(6292 return c;) 69.8962 Tj
0 -436.6946 Td
-(6293 ) 21.8426 Tj
+(6293 }) 26.2111 Tj
0 -446.1879 Td
(6294 ) 21.8426 Tj
0 -455.6813 Td
-(6295 ) 21.8426 Tj
+(6295 void) 39.3166 Tj
0 -465.1747 Td
-(6296 ) 21.8426 Tj
+(6296 kbdintr\(void\)) 78.6333 Tj
0 -474.668 Td
-(6297 ) 21.8426 Tj
+(6297 {) 26.2111 Tj
0 -484.1614 Td
-(6298 ) 21.8426 Tj
+(6298 consoleintr\(kbdgetc\);) 122.3184 Tj
0 -493.6547 Td
-(6299 ) 21.8426 Tj
+(6299 }) 26.2111 Tj
0 -522.1348 Td
(Sheet 62) 34.9481 Tj
Q
@@ -20770,6 +20922,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -20787,100 +20941,103 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/console.c Page 2) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/console.c Page 1) 174.7406 Tj
0 -28.4801 Td
-(6300 static void) 69.8962 Tj
+(6300 // Console input and output.) 144.161 Tj
0 -37.9735 Td
-(6301 cga_putc\(int c\)) 87.3703 Tj
+(6301 // Input is from the keyboard or serial port.) 218.4257 Tj
0 -47.4668 Td
-(6302 {) 26.2111 Tj
+(6302 // Output is written to the screen and serial port.) 244.6368 Tj
0 -56.9602 Td
-(6303 int pos;) 65.5277 Tj
+(6303 ) 21.8426 Tj
0 -66.4535 Td
-(6304 ) 21.8426 Tj
+(6304 #include "types.h") 100.4758 Tj
0 -75.9469 Td
-(6305 // Cursor position: col + 80*row.) 174.7406 Tj
+(6305 #include "defs.h") 96.1073 Tj
0 -85.4403 Td
-(6306 outb\(CRTPORT, 14\);) 109.2129 Tj
+(6306 #include "param.h") 100.4758 Tj
0 -94.9336 Td
-(6307 pos = inb\(CRTPORT+1\) << 8;) 144.161 Tj
+(6307 #include "traps.h") 100.4758 Tj
0 -104.427 Td
-(6308 outb\(CRTPORT, 15\);) 109.2129 Tj
+(6308 #include "spinlock.h") 113.5814 Tj
0 -113.9203 Td
-(6309 pos |= inb\(CRTPORT+1\);) 126.6869 Tj
+(6309 #include "file.h") 96.1073 Tj
0 -123.4137 Td
-(6310 ) 21.8426 Tj
+(6310 #include "mmu.h") 91.7388 Tj
0 -132.9071 Td
-(6311 if\(c == '\\n'\)) 87.3703 Tj
+(6311 #include "proc.h") 96.1073 Tj
0 -142.4004 Td
-(6312 pos += 80 - pos%80;) 122.3184 Tj
+(6312 #include "x86.h") 91.7388 Tj
0 -151.8938 Td
-(6313 else if\(c == BACKSPACE\){) 135.4239 Tj
+(6313 ) 21.8426 Tj
0 -161.3871 Td
-(6314 if\(pos > 0\)) 87.3703 Tj
+(6314 static void consputc\(int\);) 135.4239 Tj
0 -170.8805 Td
-(6315 crt[--pos] = ' ' | 0x0700;) 161.635 Tj
+(6315 ) 21.8426 Tj
0 -180.3739 Td
-(6316 } else) 56.7907 Tj
+(6316 static int panicked = 0;) 126.6869 Tj
0 -189.8672 Td
-(6317 crt[pos++] = \(c&0xff\) | 0x0700; // black on white) 257.7424 Tj
+(6317 ) 21.8426 Tj
0 -199.3606 Td
-(6318 ) 21.8426 Tj
+(6318 static struct {) 87.3703 Tj
0 -208.8539 Td
-(6319 if\(\(pos/80\) >= 24\){ // Scroll up.) 179.1091 Tj
+(6319 ) 21.8426 Tj
+-1504.73 TJm
+(struct spinlock lock;) 91.7388 Tj
0 -218.3473 Td
-(6320 memmove\(crt, crt+80, sizeof\(crt[0]\)*23*80\);) 227.1628 Tj
+(6320 ) 21.8426 Tj
+-1504.73 TJm
+(int locking;) 52.4222 Tj
0 -227.8407 Td
-(6321 pos -= 80;) 83.0018 Tj
+(6321 } cons;) 52.4222 Tj
0 -237.334 Td
-(6322 memset\(crt+pos, 0, sizeof\(crt[0]\)*\(24*80 - pos\)\)\
-;) 253.3738 Tj
+(6322 ) 21.8426 Tj
0 -246.8274 Td
-(6323 }) 34.9481 Tj
+(6323 static void) 69.8962 Tj
0 -256.3207 Td
-(6324 ) 21.8426 Tj
+(6324 printint\(int xx, int base, int sgn\)) 174.7406 Tj
0 -265.8141 Td
-(6325 outb\(CRTPORT, 14\);) 109.2129 Tj
+(6325 {) 26.2111 Tj
0 -275.3075 Td
-(6326 outb\(CRTPORT+1, pos>>8\);) 135.4239 Tj
+(6326 static char digits[] = "0123456789abcdef";) 214.0572 Tj
0 -284.8008 Td
-(6327 outb\(CRTPORT, 15\);) 109.2129 Tj
+(6327 char buf[16];) 87.3703 Tj
0 -294.2942 Td
-(6328 outb\(CRTPORT+1, pos\);) 122.3184 Tj
+(6328 int i = 0, neg = 0;) 113.5814 Tj
0 -303.7875 Td
-(6329 crt[pos] = ' ' | 0x0700;) 135.4239 Tj
+(6329 uint x;) 61.1592 Tj
0 -313.2809 Td
-(6330 }) 26.2111 Tj
+(6330 ) 21.8426 Tj
0 -322.7743 Td
-(6331 ) 21.8426 Tj
+(6331 if\(sgn && xx < 0\){) 109.2129 Tj
0 -332.2676 Td
-(6332 void) 39.3166 Tj
+(6332 neg = 1;) 74.2647 Tj
0 -341.761 Td
-(6333 cons_putc\(int c\)) 91.7388 Tj
+(6333 x = -xx;) 74.2647 Tj
0 -351.2543 Td
-(6334 {) 26.2111 Tj
+(6334 } else) 56.7907 Tj
0 -360.7477 Td
-(6335 if\(panicked\){) 87.3703 Tj
+(6335 x = xx;) 69.8962 Tj
0 -370.2411 Td
-(6336 cli\(\);) 65.5277 Tj
+(6336 ) 21.8426 Tj
0 -379.7344 Td
-(6337 for\(;;\)) 69.8962 Tj
+(6337 do{) 43.6851 Tj
0 -389.2278 Td
-(6338 ;) 52.4222 Tj
+(6338 buf[i++] = digits[x % base];) 161.635 Tj
0 -398.7211 Td
-(6339 }) 34.9481 Tj
+(6339 }while\(\(x /= base\) != 0\);) 139.7925 Tj
0 -408.2145 Td
-(6340 ) 21.8426 Tj
+(6340 if\(neg\)) 61.1592 Tj
0 -417.7079 Td
-(6341 lpt_putc\(c\);) 83.0018 Tj
+(6341 buf[i++] = '-';) 104.8443 Tj
0 -427.2012 Td
-(6342 cga_putc\(c\);) 83.0018 Tj
+(6342 ) 21.8426 Tj
0 -436.6946 Td
-(6343 }) 26.2111 Tj
+(6343 while\(--i >= 0\)) 96.1073 Tj
0 -446.1879 Td
-(6344 ) 21.8426 Tj
+(6344 consputc\(buf[i]\);) 113.5814 Tj
0 -455.6813 Td
-(6345 ) 21.8426 Tj
+(6345 }) 26.2111 Tj
0 -465.1747 Td
(6346 ) 21.8426 Tj
0 -474.668 Td
@@ -20907,107 +21064,107 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/console.c Page 3) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/console.c Page 2) 174.7406 Tj
0 -28.4801 Td
-(6350 void) 39.3166 Tj
+(6350 // Print to the console. only understands %d, %x, %p, %s.) 270.8479 Tj
0 -37.9735 Td
-(6351 printint\(int xx, int base, int sgn\)) 174.7406 Tj
+(6351 void) 39.3166 Tj
0 -47.4668 Td
-(6352 {) 26.2111 Tj
+(6352 cprintf\(char *fmt, ...\)) 122.3184 Tj
0 -56.9602 Td
-(6353 static char digits[] = "0123456789ABCDEF";) 214.0572 Tj
+(6353 {) 26.2111 Tj
0 -66.4535 Td
-(6354 char buf[16];) 87.3703 Tj
+(6354 int i, c, state, locking;) 139.7925 Tj
0 -75.9469 Td
-(6355 int i = 0, neg = 0;) 113.5814 Tj
+(6355 uint *argp;) 78.6333 Tj
0 -85.4403 Td
-(6356 uint x;) 61.1592 Tj
+(6356 char *s;) 65.5277 Tj
0 -94.9336 Td
(6357 ) 21.8426 Tj
0 -104.427 Td
-(6358 if\(sgn && xx < 0\){) 109.2129 Tj
+(6358 locking = cons.locking;) 131.0554 Tj
0 -113.9203 Td
-(6359 neg = 1;) 74.2647 Tj
+(6359 if\(locking\)) 78.6333 Tj
0 -123.4137 Td
-(6360 x = 0 - xx;) 87.3703 Tj
+(6360 acquire\(&cons.lock\);) 126.6869 Tj
0 -132.9071 Td
-(6361 } else {) 65.5277 Tj
+(6361 ) 21.8426 Tj
0 -142.4004 Td
-(6362 x = xx;) 69.8962 Tj
+(6362 argp = \(uint*\)\(void*\)&fmt + 1;) 161.635 Tj
0 -151.8938 Td
-(6363 }) 34.9481 Tj
+(6363 state = 0;) 74.2647 Tj
0 -161.3871 Td
-(6364 ) 21.8426 Tj
+(6364 for\(i = 0; \(c = fmt[i] & 0xff\) != 0; i++\){) 214.0572 Tj
0 -170.8805 Td
-(6365 do{) 43.6851 Tj
+(6365 if\(c != '%'\){) 96.1073 Tj
0 -180.3739 Td
-(6366 buf[i++] = digits[x % base];) 161.635 Tj
+(6366 consputc\(c\);) 100.4758 Tj
0 -189.8672 Td
-(6367 }while\(\(x /= base\) != 0\);) 139.7925 Tj
+(6367 continue;) 87.3703 Tj
0 -199.3606 Td
-(6368 if\(neg\)) 61.1592 Tj
+(6368 }) 43.6851 Tj
0 -208.8539 Td
-(6369 buf[i++] = '-';) 104.8443 Tj
+(6369 c = fmt[++i] & 0xff;) 126.6869 Tj
0 -218.3473 Td
-(6370 ) 21.8426 Tj
+(6370 if\(c == 0\)) 83.0018 Tj
0 -227.8407 Td
-(6371 while\(--i >= 0\)) 96.1073 Tj
+(6371 break;) 74.2647 Tj
0 -237.334 Td
-(6372 cons_putc\(buf[i]\);) 117.9499 Tj
+(6372 switch\(c\){) 83.0018 Tj
0 -246.8274 Td
-(6373 }) 26.2111 Tj
+(6373 case 'd':) 78.6333 Tj
0 -256.3207 Td
-(6374 ) 21.8426 Tj
+(6374 printint\(*argp++, 10, 1\);) 157.2665 Tj
0 -265.8141 Td
-(6375 // Print to the console. only understands %d, %x, %p, %s.) 270.8479 Tj
+(6375 break;) 74.2647 Tj
0 -275.3075 Td
-(6376 void) 39.3166 Tj
+(6376 case 'x':) 78.6333 Tj
0 -284.8008 Td
-(6377 cprintf\(char *fmt, ...\)) 122.3184 Tj
+(6377 case 'p':) 78.6333 Tj
0 -294.2942 Td
-(6378 {) 26.2111 Tj
+(6378 printint\(*argp++, 16, 0\);) 157.2665 Tj
0 -303.7875 Td
-(6379 int i, c, state, locking;) 139.7925 Tj
+(6379 break;) 74.2647 Tj
0 -313.2809 Td
-(6380 uint *argp;) 78.6333 Tj
+(6380 case 's':) 78.6333 Tj
0 -322.7743 Td
-(6381 char *s;) 65.5277 Tj
+(6381 if\(\(s = \(char*\)*argp++\) == 0\)) 174.7406 Tj
0 -332.2676 Td
-(6382 ) 21.8426 Tj
+(6382 s = "\(null\)";) 113.5814 Tj
0 -341.761 Td
-(6383 locking = use_console_lock;) 148.5295 Tj
+(6383 for\(; *s; s++\)) 109.2129 Tj
0 -351.2543 Td
-(6384 if\(locking\)) 78.6333 Tj
+(6384 consputc\(*s\);) 113.5814 Tj
0 -360.7477 Td
-(6385 acquire\(&console_lock\);) 139.7925 Tj
+(6385 break;) 74.2647 Tj
0 -370.2411 Td
-(6386 ) 21.8426 Tj
+(6386 case '%':) 78.6333 Tj
0 -379.7344 Td
-(6387 argp = \(uint*\)\(void*\)&fmt + 1;) 161.635 Tj
+(6387 consputc\('%'\);) 109.2129 Tj
0 -389.2278 Td
-(6388 state = 0;) 74.2647 Tj
+(6388 break;) 74.2647 Tj
0 -398.7211 Td
-(6389 for\(i = 0; fmt[i]; i++\){) 135.4239 Tj
+(6389 default:) 74.2647 Tj
0 -408.2145 Td
-(6390 c = fmt[i] & 0xff;) 117.9499 Tj
+(6390 // Print unknown % sequence to draw attention.) 249.0053 Tj
0 -417.7079 Td
-(6391 switch\(state\){) 100.4758 Tj
+(6391 consputc\('%'\);) 109.2129 Tj
0 -427.2012 Td
-(6392 case 0:) 69.8962 Tj
+(6392 consputc\(c\);) 100.4758 Tj
0 -436.6946 Td
-(6393 if\(c == '%'\)) 100.4758 Tj
+(6393 break;) 74.2647 Tj
0 -446.1879 Td
-(6394 state = '%';) 109.2129 Tj
+(6394 }) 43.6851 Tj
0 -455.6813 Td
-(6395 else) 65.5277 Tj
+(6395 }) 34.9481 Tj
0 -465.1747 Td
-(6396 cons_putc\(c\);) 113.5814 Tj
+(6396 ) 21.8426 Tj
0 -474.668 Td
-(6397 break;) 74.2647 Tj
+(6397 if\(locking\)) 78.6333 Tj
0 -484.1614 Td
-(6398 ) 21.8426 Tj
+(6398 release\(&cons.lock\);) 126.6869 Tj
0 -493.6547 Td
-(6399 ) 21.8426 Tj
+(6399 }) 26.2111 Tj
0 -522.1348 Td
(Sheet 63) 34.9481 Tj
Q
@@ -21038,6 +21195,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -21055,103 +21214,103 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/console.c Page 4) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/console.c Page 3) 174.7406 Tj
0 -28.4801 Td
-(6400 case '%':) 78.6333 Tj
+(6400 void) 39.3166 Tj
0 -37.9735 Td
-(6401 switch\(c\){) 91.7388 Tj
+(6401 panic\(char *s\)) 83.0018 Tj
0 -47.4668 Td
-(6402 case 'd':) 87.3703 Tj
+(6402 {) 26.2111 Tj
0 -56.9602 Td
-(6403 printint\(*argp++, 10, 1\);) 166.0035 Tj
+(6403 int i;) 56.7907 Tj
0 -66.4535 Td
-(6404 break;) 83.0018 Tj
+(6404 uint pcs[10];) 87.3703 Tj
0 -75.9469 Td
-(6405 case 'x':) 87.3703 Tj
+(6405 ) 21.8426 Tj
0 -85.4403 Td
-(6406 case 'p':) 87.3703 Tj
+(6406 cli\(\);) 56.7907 Tj
0 -94.9336 Td
-(6407 printint\(*argp++, 16, 0\);) 166.0035 Tj
+(6407 cons.locking = 0;) 104.8443 Tj
0 -104.427 Td
-(6408 break;) 83.0018 Tj
+(6408 cprintf\("cpu%d: panic: ", cpu\(\)\);) 174.7406 Tj
0 -113.9203 Td
-(6409 case 's':) 87.3703 Tj
+(6409 cprintf\(s\);) 78.6333 Tj
0 -123.4137 Td
-(6410 s = \(char*\)*argp++;) 139.7925 Tj
+(6410 cprintf\("\\n"\);) 91.7388 Tj
0 -132.9071 Td
-(6411 if\(s == 0\)) 100.4758 Tj
+(6411 getcallerpcs\(&s, pcs\);) 126.6869 Tj
0 -142.4004 Td
-(6412 s = "\(null\)";) 122.3184 Tj
+(6412 for\(i=0; i<10; i++\)) 113.5814 Tj
0 -151.8938 Td
-(6413 for\(; *s; s++\)) 117.9499 Tj
+(6413 cprintf\(" %p", pcs[i]\);) 139.7925 Tj
0 -161.3871 Td
-(6414 cons_putc\(*s\);) 126.6869 Tj
+(6414 panicked = 1; // freeze other CPU) 174.7406 Tj
0 -170.8805 Td
-(6415 break;) 83.0018 Tj
+(6415 for\(;;\)) 61.1592 Tj
0 -180.3739 Td
-(6416 case '%':) 87.3703 Tj
+(6416 ;) 43.6851 Tj
0 -189.8672 Td
-(6417 cons_putc\('%'\);) 122.3184 Tj
+(6417 }) 26.2111 Tj
0 -199.3606 Td
-(6418 break;) 83.0018 Tj
+(6418 ) 21.8426 Tj
0 -208.8539 Td
-(6419 default:) 83.0018 Tj
+(6419 ) 21.8426 Tj
0 -218.3473 Td
-(6420 // Print unknown % sequence to draw attention.) 257.7424 Tj
+(6420 ) 21.8426 Tj
0 -227.8407 Td
-(6421 cons_putc\('%'\);) 122.3184 Tj
+(6421 ) 21.8426 Tj
0 -237.334 Td
-(6422 cons_putc\(c\);) 113.5814 Tj
+(6422 ) 21.8426 Tj
0 -246.8274 Td
-(6423 break;) 83.0018 Tj
+(6423 ) 21.8426 Tj
0 -256.3207 Td
-(6424 }) 52.4222 Tj
+(6424 ) 21.8426 Tj
0 -265.8141 Td
-(6425 state = 0;) 91.7388 Tj
+(6425 ) 21.8426 Tj
0 -275.3075 Td
-(6426 break;) 74.2647 Tj
+(6426 ) 21.8426 Tj
0 -284.8008 Td
-(6427 }) 43.6851 Tj
+(6427 ) 21.8426 Tj
0 -294.2942 Td
-(6428 }) 34.9481 Tj
+(6428 ) 21.8426 Tj
0 -303.7875 Td
(6429 ) 21.8426 Tj
0 -313.2809 Td
-(6430 if\(locking\)) 78.6333 Tj
+(6430 ) 21.8426 Tj
0 -322.7743 Td
-(6431 release\(&console_lock\);) 139.7925 Tj
+(6431 ) 21.8426 Tj
0 -332.2676 Td
-(6432 }) 26.2111 Tj
+(6432 ) 21.8426 Tj
0 -341.761 Td
(6433 ) 21.8426 Tj
0 -351.2543 Td
-(6434 int) 34.9481 Tj
+(6434 ) 21.8426 Tj
0 -360.7477 Td
-(6435 console_write\(struct inode *ip, char *buf, int n\)) 235.8998 Tj
+(6435 ) 21.8426 Tj
0 -370.2411 Td
-(6436 {) 26.2111 Tj
+(6436 ) 21.8426 Tj
0 -379.7344 Td
-(6437 int i;) 56.7907 Tj
+(6437 ) 21.8426 Tj
0 -389.2278 Td
(6438 ) 21.8426 Tj
0 -398.7211 Td
-(6439 iunlock\(ip\);) 83.0018 Tj
+(6439 ) 21.8426 Tj
0 -408.2145 Td
-(6440 acquire\(&console_lock\);) 131.0554 Tj
+(6440 ) 21.8426 Tj
0 -417.7079 Td
-(6441 for\(i = 0; i < n; i++\)) 126.6869 Tj
+(6441 ) 21.8426 Tj
0 -427.2012 Td
-(6442 cons_putc\(buf[i] & 0xff\);) 148.5295 Tj
+(6442 ) 21.8426 Tj
0 -436.6946 Td
-(6443 release\(&console_lock\);) 131.0554 Tj
+(6443 ) 21.8426 Tj
0 -446.1879 Td
-(6444 ilock\(ip\);) 74.2647 Tj
+(6444 ) 21.8426 Tj
0 -455.6813 Td
(6445 ) 21.8426 Tj
0 -465.1747 Td
-(6446 return n;) 69.8962 Tj
+(6446 ) 21.8426 Tj
0 -474.668 Td
-(6447 }) 26.2111 Tj
+(6447 ) 21.8426 Tj
0 -484.1614 Td
(6448 ) 21.8426 Tj
0 -493.6547 Td
@@ -21174,107 +21333,106 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/console.c Page 5) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/console.c Page 4) 174.7406 Tj
0 -28.4801 Td
-(6450 #define INPUT_BUF 128) 113.5814 Tj
+(6450 #define BACKSPACE 0x100) 122.3184 Tj
0 -37.9735 Td
-(6451 struct {) 56.7907 Tj
+(6451 #define CRTPORT 0x3d4) 113.5814 Tj
0 -47.4668 Td
-(6452 struct spinlock lock;) 122.3184 Tj
+(6452 static ushort *crt = \(ushort*\)0xb8000; // CGA memory) 253.3738 Tj
0 -56.9602 Td
-(6453 char buf[INPUT_BUF];) 117.9499 Tj
+(6453 ) 21.8426 Tj
0 -66.4535 Td
-(6454 uint r; // Read index) 126.6869 Tj
+(6454 static void) 69.8962 Tj
0 -75.9469 Td
-(6455 uint w; // Write index) 131.0554 Tj
+(6455 cgaputc\(int c\)) 83.0018 Tj
0 -85.4403 Td
-(6456 uint e; // Edit index) 126.6869 Tj
+(6456 {) 26.2111 Tj
0 -94.9336 Td
-(6457 } input;) 56.7907 Tj
+(6457 int pos;) 65.5277 Tj
0 -104.427 Td
(6458 ) 21.8426 Tj
0 -113.9203 Td
-(6459 #define C\(x\) \(\(x\)-'@'\) // Control-x) 183.4776 Tj
+(6459 // Cursor position: col + 80*row.) 174.7406 Tj
0 -123.4137 Td
-(6460 ) 21.8426 Tj
+(6460 outb\(CRTPORT, 14\);) 109.2129 Tj
0 -132.9071 Td
-(6461 void) 39.3166 Tj
+(6461 pos = inb\(CRTPORT+1\) << 8;) 144.161 Tj
0 -142.4004 Td
-(6462 console_intr\(int \(*getc\)\(void\)\)) 157.2665 Tj
+(6462 outb\(CRTPORT, 15\);) 109.2129 Tj
0 -151.8938 Td
-(6463 {) 26.2111 Tj
+(6463 pos |= inb\(CRTPORT+1\);) 126.6869 Tj
0 -161.3871 Td
-(6464 int c;) 56.7907 Tj
+(6464 ) 21.8426 Tj
0 -170.8805 Td
-(6465 ) 21.8426 Tj
+(6465 if\(c == '\\n'\)) 87.3703 Tj
0 -180.3739 Td
-(6466 acquire\(&input.lock\);) 122.3184 Tj
+(6466 pos += 80 - pos%80;) 122.3184 Tj
0 -189.8672 Td
-(6467 while\(\(c = getc\(\)\) >= 0\){) 139.7925 Tj
+(6467 else if\(c == BACKSPACE\){) 135.4239 Tj
0 -199.3606 Td
-(6468 switch\(c\){) 83.0018 Tj
+(6468 if\(pos > 0\)) 87.3703 Tj
0 -208.8539 Td
-(6469 case C\('P'\): // Process listing.) 183.4776 Tj
+(6469 crt[--pos] = ' ' | 0x0700;) 161.635 Tj
0 -218.3473 Td
-(6470 procdump\(\);) 96.1073 Tj
+(6470 } else) 56.7907 Tj
0 -227.8407 Td
-(6471 break;) 74.2647 Tj
+(6471 crt[pos++] = \(c&0xff\) | 0x0700; // black on white) 257.7424 Tj
0 -237.334 Td
-(6472 case C\('U'\): // Kill line.) 157.2665 Tj
+(6472 ) 21.8426 Tj
0 -246.8274 Td
-(6473 while\(input.e != input.w &&) 166.0035 Tj
+(6473 if\(\(pos/80\) >= 24\){ // Scroll up.) 179.1091 Tj
0 -256.3207 Td
-(6474 input.buf[\(input.e-1\) % INPUT_BUF] != '\\n'\)\
-{) 266.4794 Tj
+(6474 memmove\(crt, crt+80, sizeof\(crt[0]\)*23*80\);) 227.1628 Tj
0 -265.8141 Td
-(6475 input.e--;) 100.4758 Tj
+(6475 pos -= 80;) 83.0018 Tj
0 -275.3075 Td
-(6476 cons_putc\(BACKSPACE\);) 148.5295 Tj
+(6476 memset\(crt+pos, 0, sizeof\(crt[0]\)*\(24*80 - pos\)\)\
+;) 253.3738 Tj
0 -284.8008 Td
-(6477 }) 52.4222 Tj
+(6477 }) 34.9481 Tj
0 -294.2942 Td
-(6478 break;) 74.2647 Tj
+(6478 ) 21.8426 Tj
0 -303.7875 Td
-(6479 case C\('H'\): // Backspace) 152.898 Tj
+(6479 outb\(CRTPORT, 14\);) 109.2129 Tj
0 -313.2809 Td
-(6480 if\(input.e != input.w\){) 148.5295 Tj
+(6480 outb\(CRTPORT+1, pos>>8\);) 135.4239 Tj
0 -322.7743 Td
-(6481 input.e--;) 100.4758 Tj
+(6481 outb\(CRTPORT, 15\);) 109.2129 Tj
0 -332.2676 Td
-(6482 cons_putc\(BACKSPACE\);) 148.5295 Tj
+(6482 outb\(CRTPORT+1, pos\);) 122.3184 Tj
0 -341.761 Td
-(6483 }) 52.4222 Tj
+(6483 crt[pos] = ' ' | 0x0700;) 135.4239 Tj
0 -351.2543 Td
-(6484 break;) 74.2647 Tj
+(6484 }) 26.2111 Tj
0 -360.7477 Td
-(6485 default:) 74.2647 Tj
+(6485 ) 21.8426 Tj
0 -370.2411 Td
-(6486 if\(c != 0 && input.e-input.r < INPUT_BUF\){) 231.5313 Tj
+(6486 void) 39.3166 Tj
0 -379.7344 Td
-(6487 input.buf[input.e++ % INPUT_BUF] = c;) 218.4257 Tj
+(6487 consputc\(int c\)) 87.3703 Tj
0 -389.2278 Td
-(6488 cons_putc\(c\);) 113.5814 Tj
+(6488 {) 26.2111 Tj
0 -398.7211 Td
-(6489 if\(c == '\\n' || c == C\('D'\) || input.e == inpu\
-t.r+INPUT_BUF\){) 323.2701 Tj
+(6489 if\(panicked\){) 87.3703 Tj
0 -408.2145 Td
-(6490 input.w = input.e;) 144.161 Tj
+(6490 cli\(\);) 65.5277 Tj
0 -417.7079 Td
-(6491 wakeup\(&input.r\);) 139.7925 Tj
+(6491 for\(;;\)) 69.8962 Tj
0 -427.2012 Td
-(6492 }) 61.1592 Tj
+(6492 ;) 52.4222 Tj
0 -436.6946 Td
-(6493 }) 52.4222 Tj
+(6493 }) 34.9481 Tj
0 -446.1879 Td
-(6494 break;) 74.2647 Tj
+(6494 ) 21.8426 Tj
0 -455.6813 Td
-(6495 }) 43.6851 Tj
+(6495 uartputc\(c\);) 83.0018 Tj
0 -465.1747 Td
-(6496 }) 34.9481 Tj
+(6496 cgaputc\(c\);) 78.6333 Tj
0 -474.668 Td
-(6497 release\(&input.lock\);) 122.3184 Tj
+(6497 }) 26.2111 Tj
0 -484.1614 Td
-(6498 }) 26.2111 Tj
+(6498 ) 21.8426 Tj
0 -493.6547 Td
(6499 ) 21.8426 Tj
0 -522.1348 Td
@@ -21307,6 +21465,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -21324,105 +21484,107 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/console.c Page 6) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/console.c Page 5) 174.7406 Tj
0 -28.4801 Td
-(6500 int) 34.9481 Tj
+(6500 #define INPUT_BUF 128) 113.5814 Tj
0 -37.9735 Td
-(6501 console_read\(struct inode *ip, char *dst, int n\)) 231.5313 Tj
+(6501 struct {) 56.7907 Tj
0 -47.4668 Td
-(6502 {) 26.2111 Tj
+(6502 struct spinlock lock;) 122.3184 Tj
0 -56.9602 Td
-(6503 uint target;) 83.0018 Tj
+(6503 char buf[INPUT_BUF];) 117.9499 Tj
0 -66.4535 Td
-(6504 int c;) 56.7907 Tj
+(6504 uint r; // Read index) 126.6869 Tj
0 -75.9469 Td
-(6505 ) 21.8426 Tj
+(6505 uint w; // Write index) 131.0554 Tj
0 -85.4403 Td
-(6506 iunlock\(ip\);) 83.0018 Tj
+(6506 uint e; // Edit index) 126.6869 Tj
0 -94.9336 Td
-(6507 target = n;) 78.6333 Tj
+(6507 } input;) 56.7907 Tj
0 -104.427 Td
-(6508 acquire\(&input.lock\);) 122.3184 Tj
+(6508 ) 21.8426 Tj
0 -113.9203 Td
-(6509 while\(n > 0\){) 87.3703 Tj
+(6509 #define C\(x\) \(\(x\)-'@'\) // Control-x) 183.4776 Tj
0 -123.4137 Td
-(6510 while\(input.r == input.w\){) 152.898 Tj
+(6510 ) 21.8426 Tj
0 -132.9071 Td
-(6511 if\(cp->killed\){) 113.5814 Tj
+(6511 void) 39.3166 Tj
0 -142.4004 Td
-(6512 release\(&input.lock\);) 148.5295 Tj
+(6512 consoleintr\(int \(*getc\)\(void\)\)) 152.898 Tj
0 -151.8938 Td
-(6513 ilock\(ip\);) 100.4758 Tj
+(6513 {) 26.2111 Tj
0 -161.3871 Td
-(6514 return -1;) 100.4758 Tj
+(6514 int c;) 56.7907 Tj
0 -170.8805 Td
-(6515 }) 52.4222 Tj
+(6515 ) 21.8426 Tj
0 -180.3739 Td
-(6516 sleep\(&input.r, &input.lock\);) 174.7406 Tj
+(6516 acquire\(&input.lock\);) 122.3184 Tj
0 -189.8672 Td
-(6517 }) 43.6851 Tj
+(6517 while\(\(c = getc\(\)\) >= 0\){) 139.7925 Tj
0 -199.3606 Td
-(6518 c = input.buf[input.r++ % INPUT_BUF];) 200.9517 Tj
+(6518 switch\(c\){) 83.0018 Tj
0 -208.8539 Td
-(6519 if\(c == C\('D'\)\){ // EOF) 144.161 Tj
+(6519 case C\('P'\): // Process listing.) 183.4776 Tj
0 -218.3473 Td
-(6520 if\(n < target\){) 113.5814 Tj
+(6520 procdump\(\);) 96.1073 Tj
0 -227.8407 Td
-(6521 // Save ^D for next time, to make sure) 222.7942 Tj
+(6521 break;) 74.2647 Tj
0 -237.334 Td
-(6522 // caller gets a 0-byte result.) 192.2146 Tj
+(6522 case C\('U'\): // Kill line.) 157.2665 Tj
0 -246.8274 Td
-(6523 input.r--;) 100.4758 Tj
+(6523 while\(input.e != input.w &&) 166.0035 Tj
0 -256.3207 Td
-(6524 }) 52.4222 Tj
+(6524 input.buf[\(input.e-1\) % INPUT_BUF] != '\\n'\)\
+{) 266.4794 Tj
0 -265.8141 Td
-(6525 break;) 74.2647 Tj
+(6525 input.e--;) 100.4758 Tj
0 -275.3075 Td
-(6526 }) 43.6851 Tj
+(6526 consputc\(BACKSPACE\);) 144.161 Tj
0 -284.8008 Td
-(6527 *dst++ = c;) 87.3703 Tj
+(6527 }) 52.4222 Tj
0 -294.2942 Td
-(6528 --n;) 56.7907 Tj
+(6528 break;) 74.2647 Tj
0 -303.7875 Td
-(6529 if\(c == '\\n'\)) 96.1073 Tj
+(6529 case C\('H'\): // Backspace) 152.898 Tj
0 -313.2809 Td
-(6530 break;) 74.2647 Tj
+(6530 if\(input.e != input.w\){) 148.5295 Tj
0 -322.7743 Td
-(6531 }) 34.9481 Tj
+(6531 input.e--;) 100.4758 Tj
0 -332.2676 Td
-(6532 release\(&input.lock\);) 122.3184 Tj
+(6532 consputc\(BACKSPACE\);) 144.161 Tj
0 -341.761 Td
-(6533 ilock\(ip\);) 74.2647 Tj
+(6533 }) 52.4222 Tj
0 -351.2543 Td
-(6534 ) 21.8426 Tj
+(6534 break;) 74.2647 Tj
0 -360.7477 Td
-(6535 return target - n;) 109.2129 Tj
+(6535 default:) 74.2647 Tj
0 -370.2411 Td
-(6536 }) 26.2111 Tj
+(6536 if\(c != 0 && input.e-input.r < INPUT_BUF\){) 231.5313 Tj
0 -379.7344 Td
-(6537 ) 21.8426 Tj
+(6537 input.buf[input.e++ % INPUT_BUF] = c;) 218.4257 Tj
0 -389.2278 Td
-(6538 ) 21.8426 Tj
+(6538 consputc\(c\);) 109.2129 Tj
0 -398.7211 Td
-(6539 ) 21.8426 Tj
+(6539 if\(c == '\\n' || c == C\('D'\) || input.e == inpu\
+t.r+INPUT_BUF\){) 323.2701 Tj
0 -408.2145 Td
-(6540 ) 21.8426 Tj
+(6540 input.w = input.e;) 144.161 Tj
0 -417.7079 Td
-(6541 ) 21.8426 Tj
+(6541 wakeup\(&input.r\);) 139.7925 Tj
0 -427.2012 Td
-(6542 ) 21.8426 Tj
+(6542 }) 61.1592 Tj
0 -436.6946 Td
-(6543 ) 21.8426 Tj
+(6543 }) 52.4222 Tj
0 -446.1879 Td
-(6544 ) 21.8426 Tj
+(6544 break;) 74.2647 Tj
0 -455.6813 Td
-(6545 ) 21.8426 Tj
+(6545 }) 43.6851 Tj
0 -465.1747 Td
-(6546 ) 21.8426 Tj
+(6546 }) 34.9481 Tj
0 -474.668 Td
-(6547 ) 21.8426 Tj
+(6547 release\(&input.lock\);) 122.3184 Tj
0 -484.1614 Td
-(6548 ) 21.8426 Tj
+(6548 }) 26.2111 Tj
0 -493.6547 Td
(6549 ) 21.8426 Tj
0 -522.1348 Td
@@ -21443,81 +21605,81 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/console.c Page 7) 174.7406 Tj
+(Aug 8 01:04 2009 xv6/console.c Page 6) 174.7406 Tj
0 -28.4801 Td
-(6550 void) 39.3166 Tj
+(6550 int) 34.9481 Tj
0 -37.9735 Td
-(6551 console_init\(void\)) 100.4758 Tj
+(6551 consoleread\(struct inode *ip, char *dst, int n\)) 227.1628 Tj
0 -47.4668 Td
(6552 {) 26.2111 Tj
0 -56.9602 Td
-(6553 initlock\(&console_lock, "console"\);) 183.4776 Tj
+(6553 uint target;) 83.0018 Tj
0 -66.4535 Td
-(6554 initlock\(&input.lock, "console input"\);) 200.9517 Tj
+(6554 int c;) 56.7907 Tj
0 -75.9469 Td
(6555 ) 21.8426 Tj
0 -85.4403 Td
-(6556 devsw[CONSOLE].write = console_write;) 192.2146 Tj
+(6556 iunlock\(ip\);) 83.0018 Tj
0 -94.9336 Td
-(6557 devsw[CONSOLE].read = console_read;) 183.4776 Tj
+(6557 target = n;) 78.6333 Tj
0 -104.427 Td
-(6558 use_console_lock = 1;) 122.3184 Tj
+(6558 acquire\(&input.lock\);) 122.3184 Tj
0 -113.9203 Td
-(6559 ) 21.8426 Tj
+(6559 while\(n > 0\){) 87.3703 Tj
0 -123.4137 Td
-(6560 pic_enable\(IRQ_KBD\);) 117.9499 Tj
+(6560 while\(input.r == input.w\){) 152.898 Tj
0 -132.9071 Td
-(6561 ioapic_enable\(IRQ_KBD, 0\);) 144.161 Tj
+(6561 if\(cp->killed\){) 113.5814 Tj
0 -142.4004 Td
-(6562 }) 26.2111 Tj
+(6562 release\(&input.lock\);) 148.5295 Tj
0 -151.8938 Td
-(6563 ) 21.8426 Tj
+(6563 ilock\(ip\);) 100.4758 Tj
0 -161.3871 Td
-(6564 void) 39.3166 Tj
+(6564 return -1;) 100.4758 Tj
0 -170.8805 Td
-(6565 panic\(char *s\)) 83.0018 Tj
+(6565 }) 52.4222 Tj
0 -180.3739 Td
-(6566 {) 26.2111 Tj
+(6566 sleep\(&input.r, &input.lock\);) 174.7406 Tj
0 -189.8672 Td
-(6567 int i;) 56.7907 Tj
+(6567 }) 43.6851 Tj
0 -199.3606 Td
-(6568 uint pcs[10];) 87.3703 Tj
+(6568 c = input.buf[input.r++ % INPUT_BUF];) 200.9517 Tj
0 -208.8539 Td
-(6569 ) 21.8426 Tj
+(6569 if\(c == C\('D'\)\){ // EOF) 144.161 Tj
0 -218.3473 Td
-(6570 __asm __volatile\("cli"\);) 135.4239 Tj
+(6570 if\(n < target\){) 113.5814 Tj
0 -227.8407 Td
-(6571 use_console_lock = 0;) 122.3184 Tj
+(6571 // Save ^D for next time, to make sure) 222.7942 Tj
0 -237.334 Td
-(6572 cprintf\("cpu%d: panic: ", cpu\(\)\);) 174.7406 Tj
+(6572 // caller gets a 0-byte result.) 192.2146 Tj
0 -246.8274 Td
-(6573 cprintf\(s\);) 78.6333 Tj
+(6573 input.r--;) 100.4758 Tj
0 -256.3207 Td
-(6574 cprintf\("\\n"\);) 91.7388 Tj
+(6574 }) 52.4222 Tj
0 -265.8141 Td
-(6575 getcallerpcs\(&s, pcs\);) 126.6869 Tj
+(6575 break;) 74.2647 Tj
0 -275.3075 Td
-(6576 for\(i=0; i<10; i++\)) 113.5814 Tj
+(6576 }) 43.6851 Tj
0 -284.8008 Td
-(6577 cprintf\(" %p", pcs[i]\);) 139.7925 Tj
+(6577 *dst++ = c;) 87.3703 Tj
0 -294.2942 Td
-(6578 panicked = 1; // freeze other CPU) 174.7406 Tj
+(6578 --n;) 56.7907 Tj
0 -303.7875 Td
-(6579 for\(;;\)) 61.1592 Tj
+(6579 if\(c == '\\n'\)) 96.1073 Tj
0 -313.2809 Td
-(6580 ;) 43.6851 Tj
+(6580 break;) 74.2647 Tj
0 -322.7743 Td
-(6581 }) 26.2111 Tj
+(6581 }) 34.9481 Tj
0 -332.2676 Td
-(6582 ) 21.8426 Tj
+(6582 release\(&input.lock\);) 122.3184 Tj
0 -341.761 Td
-(6583 ) 21.8426 Tj
+(6583 ilock\(ip\);) 74.2647 Tj
0 -351.2543 Td
(6584 ) 21.8426 Tj
0 -360.7477 Td
-(6585 ) 21.8426 Tj
+(6585 return target - n;) 109.2129 Tj
0 -370.2411 Td
-(6586 ) 21.8426 Tj
+(6586 }) 26.2111 Tj
0 -379.7344 Td
(6587 ) 21.8426 Tj
0 -389.2278 Td
@@ -21574,6 +21736,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -21591,75 +21755,71 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/timer.c Page 1) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/console.c Page 7) 174.7406 Tj
0 -28.4801 Td
-(6600 // Intel 8253/8254/82C54 Programmable Interval Timer \(PIT\
-\).) 279.5849 Tj
+(6600 int) 34.9481 Tj
0 -37.9735 Td
-(6601 // Only used on uniprocessors;) 152.898 Tj
+(6601 consolewrite\(struct inode *ip, char *buf, int n\)) 231.5313 Tj
0 -47.4668 Td
-(6602 // SMP machines use the local APIC timer.) 200.9517 Tj
+(6602 {) 26.2111 Tj
0 -56.9602 Td
-(6603 ) 21.8426 Tj
+(6603 int i;) 56.7907 Tj
0 -66.4535 Td
-(6604 #include "types.h") 100.4758 Tj
+(6604 ) 21.8426 Tj
0 -75.9469 Td
-(6605 #include "defs.h") 96.1073 Tj
+(6605 iunlock\(ip\);) 83.0018 Tj
0 -85.4403 Td
-(6606 #include "traps.h") 100.4758 Tj
+(6606 acquire\(&cons.lock\);) 117.9499 Tj
0 -94.9336 Td
-(6607 #include "x86.h") 91.7388 Tj
+(6607 for\(i = 0; i < n; i++\)) 126.6869 Tj
0 -104.427 Td
-(6608 ) 21.8426 Tj
+(6608 consputc\(buf[i] & 0xff\);) 144.161 Tj
0 -113.9203 Td
-(6609 #define IO_TIMER1 0x040 // 8253 Timer #1) 266.4794 Tj
+(6609 release\(&cons.lock\);) 117.9499 Tj
0 -123.4137 Td
-(6610 ) 21.8426 Tj
+(6610 ilock\(ip\);) 74.2647 Tj
0 -132.9071 Td
-(6611 // Frequency of all three count-down timers;) 214.0572 Tj
+(6611 ) 21.8426 Tj
0 -142.4004 Td
-(6612 // \(TIMER_FREQ/freq\) is the appropriate count) 218.4257 Tj
+(6612 return n;) 69.8962 Tj
0 -151.8938 Td
-(6613 // to generate a frequency of freq Hz.) 187.8461 Tj
+(6613 }) 26.2111 Tj
0 -161.3871 Td
(6614 ) 21.8426 Tj
0 -170.8805 Td
-(6615 #define TIMER_FREQ 1193182) 157.2665 Tj
+(6615 void) 39.3166 Tj
0 -180.3739 Td
-(6616 #define TIMER_DIV\(x\) \(\(TIMER_FREQ+\(x\)/2\)/\(x\)\)) 231.5313 Tj
+(6616 consoleinit\(void\)) 96.1073 Tj
0 -189.8672 Td
-(6617 ) 21.8426 Tj
+(6617 {) 26.2111 Tj
0 -199.3606 Td
-(6618 #define TIMER_MODE \(IO_TIMER1 + 3\) // timer mode po\
-rt) 275.2164 Tj
+(6618 initlock\(&cons.lock, "console"\);) 170.3721 Tj
0 -208.8539 Td
-(6619 #define TIMER_SEL0 0x00 // select counter 0) 244.6368 Tj
+(6619 initlock\(&input.lock, "input"\);) 166.0035 Tj
0 -218.3473 Td
-(6620 #define TIMER_RATEGEN 0x04 // mode 2, rate generator) 270.8479 Tj
+(6620 ) 21.8426 Tj
0 -227.8407 Td
-(6621 #define TIMER_16BIT 0x30 // r/w counter 16 bits, LS\
-B first) 305.796 Tj
+(6621 devsw[CONSOLE].write = consolewrite;) 187.8461 Tj
0 -237.334 Td
-(6622 ) 21.8426 Tj
+(6622 devsw[CONSOLE].read = consoleread;) 179.1091 Tj
0 -246.8274 Td
-(6623 void) 39.3166 Tj
+(6623 cons.locking = 1;) 104.8443 Tj
0 -256.3207 Td
-(6624 timer_init\(void\)) 91.7388 Tj
+(6624 ) 21.8426 Tj
0 -265.8141 Td
-(6625 {) 26.2111 Tj
+(6625 picenable\(IRQ_KBD\);) 113.5814 Tj
0 -275.3075 Td
-(6626 // Interrupt 100 times/sec.) 148.5295 Tj
+(6626 ioapicenable\(IRQ_KBD, 0\);) 139.7925 Tj
0 -284.8008 Td
-(6627 outb\(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16B\
-IT\);) 288.322 Tj
+(6627 }) 26.2111 Tj
0 -294.2942 Td
-(6628 outb\(IO_TIMER1, TIMER_DIV\(100\) % 256\);) 196.5831 Tj
+(6628 ) 21.8426 Tj
0 -303.7875 Td
-(6629 outb\(IO_TIMER1, TIMER_DIV\(100\) / 256\);) 196.5831 Tj
+(6629 ) 21.8426 Tj
0 -313.2809 Td
-(6630 pic_enable\(IRQ_TIMER\);) 126.6869 Tj
+(6630 ) 21.8426 Tj
0 -322.7743 Td
-(6631 }) 26.2111 Tj
+(6631 ) 21.8426 Tj
0 -332.2676 Td
(6632 ) 21.8426 Tj
0 -341.761 Td
@@ -21714,71 +21874,75 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/timer.c Page 2) 166.0035 Tj
+(Aug 8 01:04 2009 xv6/timer.c Page 1) 166.0035 Tj
0 -28.4801 Td
-(6650 // Blank page) 78.6333 Tj
+(6650 // Intel 8253/8254/82C54 Programmable Interval Timer \(PIT\
+\).) 279.5849 Tj
0 -37.9735 Td
-(6651 ) 21.8426 Tj
+(6651 // Only used on uniprocessors;) 152.898 Tj
0 -47.4668 Td
-(6652 ) 21.8426 Tj
+(6652 // SMP machines use the local APIC timer.) 200.9517 Tj
0 -56.9602 Td
(6653 ) 21.8426 Tj
0 -66.4535 Td
-(6654 ) 21.8426 Tj
+(6654 #include "types.h") 100.4758 Tj
0 -75.9469 Td
-(6655 ) 21.8426 Tj
+(6655 #include "defs.h") 96.1073 Tj
0 -85.4403 Td
-(6656 ) 21.8426 Tj
+(6656 #include "traps.h") 100.4758 Tj
0 -94.9336 Td
-(6657 ) 21.8426 Tj
+(6657 #include "x86.h") 91.7388 Tj
0 -104.427 Td
(6658 ) 21.8426 Tj
0 -113.9203 Td
-(6659 ) 21.8426 Tj
+(6659 #define IO_TIMER1 0x040 // 8253 Timer #1) 266.4794 Tj
0 -123.4137 Td
(6660 ) 21.8426 Tj
0 -132.9071 Td
-(6661 ) 21.8426 Tj
+(6661 // Frequency of all three count-down timers;) 214.0572 Tj
0 -142.4004 Td
-(6662 ) 21.8426 Tj
+(6662 // \(TIMER_FREQ/freq\) is the appropriate count) 218.4257 Tj
0 -151.8938 Td
-(6663 ) 21.8426 Tj
+(6663 // to generate a frequency of freq Hz.) 187.8461 Tj
0 -161.3871 Td
(6664 ) 21.8426 Tj
0 -170.8805 Td
-(6665 ) 21.8426 Tj
+(6665 #define TIMER_FREQ 1193182) 157.2665 Tj
0 -180.3739 Td
-(6666 ) 21.8426 Tj
+(6666 #define TIMER_DIV\(x\) \(\(TIMER_FREQ+\(x\)/2\)/\(x\)\)) 231.5313 Tj
0 -189.8672 Td
(6667 ) 21.8426 Tj
0 -199.3606 Td
-(6668 ) 21.8426 Tj
+(6668 #define TIMER_MODE \(IO_TIMER1 + 3\) // timer mode po\
+rt) 275.2164 Tj
0 -208.8539 Td
-(6669 ) 21.8426 Tj
+(6669 #define TIMER_SEL0 0x00 // select counter 0) 244.6368 Tj
0 -218.3473 Td
-(6670 ) 21.8426 Tj
+(6670 #define TIMER_RATEGEN 0x04 // mode 2, rate generator) 270.8479 Tj
0 -227.8407 Td
-(6671 ) 21.8426 Tj
+(6671 #define TIMER_16BIT 0x30 // r/w counter 16 bits, LS\
+B first) 305.796 Tj
0 -237.334 Td
(6672 ) 21.8426 Tj
0 -246.8274 Td
-(6673 ) 21.8426 Tj
+(6673 void) 39.3166 Tj
0 -256.3207 Td
-(6674 ) 21.8426 Tj
+(6674 timerinit\(void\)) 87.3703 Tj
0 -265.8141 Td
-(6675 ) 21.8426 Tj
+(6675 {) 26.2111 Tj
0 -275.3075 Td
-(6676 ) 21.8426 Tj
+(6676 // Interrupt 100 times/sec.) 148.5295 Tj
0 -284.8008 Td
-(6677 ) 21.8426 Tj
+(6677 outb\(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16B\
+IT\);) 288.322 Tj
0 -294.2942 Td
-(6678 ) 21.8426 Tj
+(6678 outb\(IO_TIMER1, TIMER_DIV\(100\) % 256\);) 196.5831 Tj
0 -303.7875 Td
-(6679 ) 21.8426 Tj
+(6679 outb\(IO_TIMER1, TIMER_DIV\(100\) / 256\);) 196.5831 Tj
0 -313.2809 Td
-(6680 ) 21.8426 Tj
+(6680 picenable\(IRQ_TIMER\);) 122.3184 Tj
0 -322.7743 Td
-(6681 ) 21.8426 Tj
+(6681 }) 26.2111 Tj
0 -332.2676 Td
(6682 ) 21.8426 Tj
0 -341.761 Td
@@ -21845,6 +22009,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -21862,7 +22028,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/initcode.S Page 1) 179.1091 Tj
+(Aug 8 01:04 2009 xv6/initcode.S Page 1) 179.1091 Tj
0 -28.4801 Td
(6700 # Initial process execs /init.) 152.898 Tj
0 -37.9735 Td
@@ -21884,7 +22050,7 @@ q
0 -113.9203 Td
(6709 pushl $init) 78.6333 Tj
0 -123.4137 Td
-(6710 pushl $0) 65.5277 Tj
+(6710 pushl $0 // where caller pc would be) 192.2146 Tj
0 -132.9071 Td
(6711 movl $SYS_exec, %eax) 117.9499 Tj
0 -142.4004 Td
@@ -21981,81 +22147,81 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/init.c Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/usys.S Page 1) 161.635 Tj
0 -28.4801 Td
-(6750 // init: The initial user-level program) 192.2146 Tj
+(6750 #include "syscall.h") 109.2129 Tj
0 -37.9735 Td
-(6751 ) 21.8426 Tj
+(6751 #include "traps.h") 100.4758 Tj
0 -47.4668 Td
-(6752 #include "types.h") 100.4758 Tj
+(6752 ) 21.8426 Tj
0 -56.9602 Td
-(6753 #include "stat.h") 96.1073 Tj
+(6753 #define SYSCALL\(name\) \\) 122.3184 Tj
0 -66.4535 Td
-(6754 #include "user.h") 96.1073 Tj
+(6754 .globl name; \\) 91.7388 Tj
0 -75.9469 Td
-(6755 #include "fcntl.h") 100.4758 Tj
+(6755 name: \\) 61.1592 Tj
0 -85.4403 Td
-(6756 ) 21.8426 Tj
+(6756 movl $SYS_ ## name, %eax; \\) 157.2665 Tj
0 -94.9336 Td
-(6757 char *sh_args[] = { "sh", 0 };) 152.898 Tj
+(6757 int $T_SYSCALL; \\) 113.5814 Tj
0 -104.427 Td
-(6758 ) 21.8426 Tj
+(6758 ret) 52.4222 Tj
0 -113.9203 Td
-(6759 int) 34.9481 Tj
+(6759 ) 21.8426 Tj
0 -123.4137 Td
-(6760 main\(void\)) 65.5277 Tj
+(6760 SYSCALL\(fork\)) 78.6333 Tj
0 -132.9071 Td
-(6761 {) 26.2111 Tj
+(6761 SYSCALL\(exit\)) 78.6333 Tj
0 -142.4004 Td
-(6762 int pid, wpid;) 91.7388 Tj
+(6762 SYSCALL\(wait\)) 78.6333 Tj
0 -151.8938 Td
-(6763 ) 21.8426 Tj
+(6763 SYSCALL\(pipe\)) 78.6333 Tj
0 -161.3871 Td
-(6764 if\(open\("console", O_RDWR\) < 0\){) 170.3721 Tj
+(6764 SYSCALL\(read\)) 78.6333 Tj
0 -170.8805 Td
-(6765 mknod\("console", 1, 1\);) 139.7925 Tj
+(6765 SYSCALL\(write\)) 83.0018 Tj
0 -180.3739 Td
-(6766 open\("console", O_RDWR\);) 144.161 Tj
+(6766 SYSCALL\(close\)) 83.0018 Tj
0 -189.8672 Td
-(6767 }) 34.9481 Tj
+(6767 SYSCALL\(kill\)) 78.6333 Tj
0 -199.3606 Td
-(6768 dup\(0\); // stdout) 109.2129 Tj
+(6768 SYSCALL\(exec\)) 78.6333 Tj
0 -208.8539 Td
-(6769 dup\(0\); // stderr) 109.2129 Tj
+(6769 SYSCALL\(open\)) 78.6333 Tj
0 -218.3473 Td
-(6770 ) 21.8426 Tj
+(6770 SYSCALL\(mknod\)) 83.0018 Tj
0 -227.8407 Td
-(6771 for\(;;\){) 65.5277 Tj
+(6771 SYSCALL\(unlink\)) 87.3703 Tj
0 -237.334 Td
-(6772 printf\(1, "init: starting sh\\n"\);) 183.4776 Tj
+(6772 SYSCALL\(fstat\)) 83.0018 Tj
0 -246.8274 Td
-(6773 pid = fork\(\);) 96.1073 Tj
+(6773 SYSCALL\(link\)) 78.6333 Tj
0 -256.3207 Td
-(6774 if\(pid < 0\){) 91.7388 Tj
+(6774 SYSCALL\(mkdir\)) 83.0018 Tj
0 -265.8141 Td
-(6775 printf\(1, "init: fork failed\\n"\);) 192.2146 Tj
+(6775 SYSCALL\(chdir\)) 83.0018 Tj
0 -275.3075 Td
-(6776 exit\(\);) 78.6333 Tj
+(6776 SYSCALL\(dup\)) 74.2647 Tj
0 -284.8008 Td
-(6777 }) 43.6851 Tj
+(6777 SYSCALL\(getpid\)) 87.3703 Tj
0 -294.2942 Td
-(6778 if\(pid == 0\){) 96.1073 Tj
+(6778 SYSCALL\(sbrk\)) 78.6333 Tj
0 -303.7875 Td
-(6779 exec\("sh", sh_args\);) 135.4239 Tj
+(6779 SYSCALL\(sleep\)) 83.0018 Tj
0 -313.2809 Td
-(6780 printf\(1, "init: exec sh failed\\n"\);) 205.3202 Tj
+(6780 ) 21.8426 Tj
0 -322.7743 Td
-(6781 exit\(\);) 78.6333 Tj
+(6781 ) 21.8426 Tj
0 -332.2676 Td
-(6782 }) 43.6851 Tj
+(6782 ) 21.8426 Tj
0 -341.761 Td
-(6783 while\(\(wpid=wait\(\)\) >= 0 && wpid != pid\)) 214.0572 Tj
+(6783 ) 21.8426 Tj
0 -351.2543 Td
-(6784 printf\(1, "zombie!\\n"\);) 148.5295 Tj
+(6784 ) 21.8426 Tj
0 -360.7477 Td
-(6785 }) 34.9481 Tj
+(6785 ) 21.8426 Tj
0 -370.2411 Td
-(6786 }) 26.2111 Tj
+(6786 ) 21.8426 Tj
0 -379.7344 Td
(6787 ) 21.8426 Tj
0 -389.2278 Td
@@ -22112,6 +22278,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -22129,81 +22297,81 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/usys.S Page 1) 161.635 Tj
+(Aug 8 01:04 2009 xv6/init.c Page 1) 161.635 Tj
0 -28.4801 Td
-(6800 #include "syscall.h") 109.2129 Tj
+(6800 // init: The initial user-level program) 192.2146 Tj
0 -37.9735 Td
-(6801 #include "traps.h") 100.4758 Tj
+(6801 ) 21.8426 Tj
0 -47.4668 Td
-(6802 ) 21.8426 Tj
+(6802 #include "types.h") 100.4758 Tj
0 -56.9602 Td
-(6803 #define STUB\(name\) \\) 109.2129 Tj
+(6803 #include "stat.h") 96.1073 Tj
0 -66.4535 Td
-(6804 .globl name; \\) 91.7388 Tj
+(6804 #include "user.h") 96.1073 Tj
0 -75.9469 Td
-(6805 name: \\) 61.1592 Tj
+(6805 #include "fcntl.h") 100.4758 Tj
0 -85.4403 Td
-(6806 movl $SYS_ ## name, %eax; \\) 157.2665 Tj
+(6806 ) 21.8426 Tj
0 -94.9336 Td
-(6807 int $T_SYSCALL; \\) 113.5814 Tj
+(6807 char *argv[] = { "sh", 0 };) 139.7925 Tj
0 -104.427 Td
-(6808 ret) 52.4222 Tj
+(6808 ) 21.8426 Tj
0 -113.9203 Td
-(6809 ) 21.8426 Tj
+(6809 int) 34.9481 Tj
0 -123.4137 Td
-(6810 STUB\(fork\)) 65.5277 Tj
+(6810 main\(void\)) 65.5277 Tj
0 -132.9071 Td
-(6811 STUB\(exit\)) 65.5277 Tj
+(6811 {) 26.2111 Tj
0 -142.4004 Td
-(6812 STUB\(wait\)) 65.5277 Tj
+(6812 int pid, wpid;) 91.7388 Tj
0 -151.8938 Td
-(6813 STUB\(pipe\)) 65.5277 Tj
+(6813 ) 21.8426 Tj
0 -161.3871 Td
-(6814 STUB\(read\)) 65.5277 Tj
+(6814 if\(open\("console", O_RDWR\) < 0\){) 170.3721 Tj
0 -170.8805 Td
-(6815 STUB\(write\)) 69.8962 Tj
+(6815 mknod\("console", 1, 1\);) 139.7925 Tj
0 -180.3739 Td
-(6816 STUB\(close\)) 69.8962 Tj
+(6816 open\("console", O_RDWR\);) 144.161 Tj
0 -189.8672 Td
-(6817 STUB\(kill\)) 65.5277 Tj
+(6817 }) 34.9481 Tj
0 -199.3606 Td
-(6818 STUB\(exec\)) 65.5277 Tj
+(6818 dup\(0\); // stdout) 109.2129 Tj
0 -208.8539 Td
-(6819 STUB\(open\)) 65.5277 Tj
+(6819 dup\(0\); // stderr) 109.2129 Tj
0 -218.3473 Td
-(6820 STUB\(mknod\)) 69.8962 Tj
+(6820 ) 21.8426 Tj
0 -227.8407 Td
-(6821 STUB\(unlink\)) 74.2647 Tj
+(6821 for\(;;\){) 65.5277 Tj
0 -237.334 Td
-(6822 STUB\(fstat\)) 69.8962 Tj
+(6822 printf\(1, "init: starting sh\\n"\);) 183.4776 Tj
0 -246.8274 Td
-(6823 STUB\(link\)) 65.5277 Tj
+(6823 pid = fork\(\);) 96.1073 Tj
0 -256.3207 Td
-(6824 STUB\(mkdir\)) 69.8962 Tj
+(6824 if\(pid < 0\){) 91.7388 Tj
0 -265.8141 Td
-(6825 STUB\(chdir\)) 69.8962 Tj
+(6825 printf\(1, "init: fork failed\\n"\);) 192.2146 Tj
0 -275.3075 Td
-(6826 STUB\(dup\)) 61.1592 Tj
+(6826 exit\(\);) 78.6333 Tj
0 -284.8008 Td
-(6827 STUB\(getpid\)) 74.2647 Tj
+(6827 }) 43.6851 Tj
0 -294.2942 Td
-(6828 STUB\(sbrk\)) 65.5277 Tj
+(6828 if\(pid == 0\){) 96.1073 Tj
0 -303.7875 Td
-(6829 STUB\(sleep\)) 69.8962 Tj
+(6829 exec\("sh", argv\);) 122.3184 Tj
0 -313.2809 Td
-(6830 ) 21.8426 Tj
+(6830 printf\(1, "init: exec sh failed\\n"\);) 205.3202 Tj
0 -322.7743 Td
-(6831 ) 21.8426 Tj
+(6831 exit\(\);) 78.6333 Tj
0 -332.2676 Td
-(6832 ) 21.8426 Tj
+(6832 }) 43.6851 Tj
0 -341.761 Td
-(6833 ) 21.8426 Tj
+(6833 while\(\(wpid=wait\(\)\) >= 0 && wpid != pid\)) 214.0572 Tj
0 -351.2543 Td
-(6834 ) 21.8426 Tj
+(6834 printf\(1, "zombie!\\n"\);) 148.5295 Tj
0 -360.7477 Td
-(6835 ) 21.8426 Tj
+(6835 }) 34.9481 Tj
0 -370.2411 Td
-(6836 ) 21.8426 Tj
+(6836 }) 26.2111 Tj
0 -379.7344 Td
(6837 ) 21.8426 Tj
0 -389.2278 Td
@@ -22248,7 +22416,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 1) 152.898 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 1) 152.898 Tj
0 -28.4801 Td
(6850 // Shell.) 61.1592 Tj
0 -37.9735 Td
@@ -22379,6 +22547,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -22396,7 +22566,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 2) 152.898 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 2) 152.898 Tj
0 -28.4801 Td
(6900 int fork1\(void\); // Fork but panics on failure.) 231.5313 Tj
0 -37.9735 Td
@@ -22515,7 +22685,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 3) 152.898 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 3) 152.898 Tj
0 -28.4801 Td
(6950 case PIPE:) 74.2647 Tj
0 -37.9735 Td
@@ -22646,6 +22816,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -22663,7 +22835,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 4) 152.898 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 4) 152.898 Tj
0 -28.4801 Td
(7000 int) 34.9481 Tj
0 -37.9735 Td
@@ -22783,7 +22955,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 5) 152.898 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 5) 152.898 Tj
0 -28.4801 Td
(7050 // Constructors) 87.3703 Tj
0 -37.9735 Td
@@ -22915,6 +23087,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -22932,7 +23106,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 6) 152.898 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 6) 152.898 Tj
0 -28.4801 Td
(7100 struct cmd*) 69.8962 Tj
0 -37.9735 Td
@@ -23051,7 +23225,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 7) 152.898 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 7) 152.898 Tj
0 -28.4801 Td
(7150 // Parsing) 65.5277 Tj
0 -37.9735 Td
@@ -23183,6 +23357,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -23200,7 +23376,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 8) 152.898 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 8) 152.898 Tj
0 -28.4801 Td
(7200 int) 34.9481 Tj
0 -37.9735 Td
@@ -23319,7 +23495,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 9) 152.898 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 9) 152.898 Tj
0 -28.4801 Td
(7250 struct cmd*) 69.8962 Tj
0 -37.9735 Td
@@ -23450,6 +23626,8 @@ pdfStartPage
false op
false OP
{} settransfer
+0 0 612 792 re
+W
q
q
[0.1 0 0 0.1 0 0] cm
@@ -23467,7 +23645,7 @@ q
[0 -0.9679 1 0 564.72 738.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 10) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 10) 157.2665 Tj
0 -28.4801 Td
(7300 struct cmd*) 69.8962 Tj
0 -37.9735 Td
@@ -23586,7 +23764,7 @@ q
[0 -0.9679 1 0 564.72 392.865] Tm
0 0 Td
/F8_0 8.7022 Tf
-(Sep 3 10:05 2008 xv6/sh.c Page 11) 157.2665 Tj
+(Aug 8 01:04 2009 xv6/sh.c Page 11) 157.2665 Tj
0 -28.4801 Td
(7350 // NUL-terminate all the counted strings.) 200.9517 Tj
0 -37.9735 Td