clean up -Wall

Makefile

@@ -25,36 +25,6 @@ OBJS = \
   kernelvec.o \
   plic.o
 
-XXXOBJS = \
-	bio.o\
-	console.o\
-	exec.o\
-	file.o\
-	fs.o\
-	ide.o\
-	ioapic.o\
-	kalloc.o\
-	kbd.o\
-	lapic.o\
-	log.o\
-	main.o\
-	mp.o\
-	picirq.o\
-	pipe.o\
-	proc.o\
-	sleeplock.o\
-	spinlock.o\
-	string.o\
-	swtch.o\
-	syscall.o\
-	sysfile.o\
-	sysproc.o\
-	trapasm.o\
-	trap.o\
-	uart.o\
-	vectors.o\
-	vm.o\
-
 # riscv64-unknown-elf- or riscv64-linux-gnu-
 # perhaps in /opt/riscv/bin
 #TOOLPREFIX = 
@@ -79,8 +49,9 @@ LD = $(TOOLPREFIX)ld
 OBJCOPY = $(TOOLPREFIX)objcopy
 OBJDUMP = $(TOOLPREFIX)objdump
 
-CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -Werror -fno-omit-frame-pointer -O
-CFLAGS = -mcmodel=medany
+# CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -Werror -fno-omit-frame-pointer -O
+CFLAGS = -Wall -Werror
+CFLAGS += -mcmodel=medany
 CFLAGS += -ffreestanding -fno-common -nostdlib -mno-relax
 CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
 

defs.h

@@ -122,8 +122,8 @@ void            userinit(void);
 int             wait(void);
 void            wakeup(void*);
 void            yield(void);
-int             either_copyout(int user_dst, uint64 dst, char *src, uint64 len);
-int             either_copyin(char *dst, int user_src, uint64 src, uint64 len);
+int             either_copyout(int user_dst, uint64 dst, void *src, uint64 len);
+int             either_copyin(void *dst, int user_src, uint64 src, uint64 len);
 
 // swtch.S
 void            swtch(struct context*, struct context*);
@@ -181,7 +181,7 @@ int             uartgetc(void);
 void            kvminit(void);
 void            kvminithart(void);
 pagetable_t     uvmcreate(void);
-void            uvminit(pagetable_t, char *, uint);
+void            uvminit(pagetable_t, uchar *, uint);
 uint64          uvmalloc(pagetable_t, uint64, uint64);
 uint64          uvmdealloc(pagetable_t, uint64, uint64);
 void            uvmcopy(pagetable_t, pagetable_t, uint64);

exec.c

@@ -129,7 +129,6 @@ loadseg(pagetable_t pagetable, uint64 va, struct inode *ip, uint offset, uint sz
 {
   uint i, n;
   uint64 pa;
-  pte_t *pte;
 
   if((va % PGSIZE) != 0)
     panic("loadseg: va must be page aligned");

file.c

@@ -106,9 +106,7 @@ filestat(struct file *f, uint64 addr)
 int
 fileread(struct file *f, uint64 addr, int n)
 {
-  struct proc *p = myproc();
   int r = 0;
-  char *buf;
 
   if(f->readable == 0)
     return -1;
@@ -133,9 +131,7 @@ fileread(struct file *f, uint64 addr, int n)
 int
 filewrite(struct file *f, uint64 addr, int n)
 {
-  struct proc *p = myproc();
   int r, ret = 0;
-  char *buf;
 
   if(f->writable == 0)
     return -1;

proc.c

@@ -150,7 +150,7 @@ proc_freepagetable(pagetable_t pagetable, uint64 sz)
 
 // a user program that calls exec("/init")
 // od -t xC initcode
-unsigned char initcode[] = {
+uchar initcode[] = {
   0x17, 0x05, 0x00, 0x00, 0x13, 0x05, 0x05, 0x02, 0x97, 0x05, 0x00, 0x00, 0x93, 0x85, 0x05, 0x02,
   0x9d, 0x48, 0x73, 0x00, 0x00, 0x00, 0x89, 0x48, 0x73, 0x00, 0x00, 0x00, 0xef, 0xf0, 0xbf, 0xff,
   0x2f, 0x69, 0x6e, 0x69, 0x74, 0x00, 0x00, 0x01, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -429,9 +429,8 @@ yield(void)
 void
 forkret(void)
 {
-  struct proc *p = myproc();
-
   static int first = 1;
+
   // Still holding ptable.lock from scheduler.
   release(&ptable.lock);
 
@@ -535,13 +534,14 @@ kill(int pid)
 // depending on usr_dst.
 // Returns 0 on success, -1 on error.
 int
-either_copyout(int user_dst, uint64 dst, char *src, uint64 len)
+either_copyout(int user_dst, uint64 dst, void *src, uint64 len)
 {
   struct proc *p = myproc();
   if(user_dst){
     return copyout(p->pagetable, dst, src, len);
   } else {
     memmove((char *)dst, src, len);
+    return 0;
   }
 }
 
@@ -549,13 +549,14 @@ either_copyout(int user_dst, uint64 dst, char *src, uint64 len)
 // depending on usr_src.
 // Returns 0 on success, -1 on error.
 int
-either_copyin(char *dst, int user_src, uint64 src, uint64 len)
+either_copyin(void *dst, int user_src, uint64 src, uint64 len)
 {
   struct proc *p = myproc();
   if(user_src){
     return copyin(p->pagetable, dst, src, len);
   } else {
     memmove(dst, (char*)src, len);
+    return 0;
   }
 }
 

trap.c

@@ -129,7 +129,6 @@ kerneltrap()
 {
   uint64 sstatus = r_sstatus();
   uint64 scause = r_scause();
-  uint64 sepc = r_sepc(); // XXX needed only for check at end?
   
   if((sstatus & SSTATUS_SPP) == 0)
     panic("kerneltrap: not from supervisor mode");
@@ -141,12 +140,6 @@ kerneltrap()
     printf("sepc=%p stval=%p\n", r_sepc(), r_stval());
     panic("kerneltrap");
   }
-
-  // XXX assert that we don't have to save/restore sstatus or sepc.
-  if(r_sstatus() != sstatus)
-    panic("kerneltrap sstatus");
-  if(r_sepc() != sepc)
-    panic("kerneltrap sepc");
 }
 
 // check if it's an external interrupt or software interrupt,
@@ -166,8 +159,6 @@ devintr()
 
     if(irq == UART0_IRQ){
       uartintr();
-    } else {
-      printf("stray interrupt irq=%d\n", irq);
     }
 
     plic_complete(irq);
@@ -175,10 +166,12 @@ devintr()
   } else if(scause == 0x8000000000000001){
     // software interrupt from a machine-mode timer interrupt.
 
-    acquire(&tickslock);
-    ticks++;
-    wakeup(&ticks);
-    release(&tickslock);
+    if(cpuid() == 0){
+      acquire(&tickslock);
+      ticks++;
+      wakeup(&ticks);
+      release(&tickslock);
+    }
     
     // acknowledge.
     w_sip(r_sip() & ~2);

vm.c

@@ -190,7 +190,7 @@ uvmcreate()
 // for the very first process.
 // sz must be less than a page.
 void
-uvminit(pagetable_t pagetable, char *src, uint sz)
+uvminit(pagetable_t pagetable, uchar *src, uint sz)
 {
   char *mem;
 
@@ -254,7 +254,6 @@ freewalk(pagetable_t pagetable)
       freewalk((pagetable_t)child);
       pagetable[i] = 0;
     } else if(pte & PTE_V){
-      // XXX trampoline pages...
       panic("freewalk: leaf");
     }
   }