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828 commits 1 branch 0 tags 23 MiB
C 94.9%
Assembly 2.8%
Makefile 2%
Perl 0.3%
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Robert Morris 8960f60b30 junk
2012-08-28 12:57:05 -04:00
.cvsignore
.dir-locals.el Setting indent-tabs-mode nil everywhere is dangerous 2011-09-05 15:22:16 -04:00
.gdbinit.tmpl
.gitignore Sync up clean and gitignore better 2011-09-05 15:21:40 -04:00
asm.h
bio.c don't let dirty blocks be evicted from cache! 2011-10-14 10:23:23 -04:00
bootasm.S comment nits 2011-09-12 14:27:14 -04:00
bootmain.c Make the ELF entry point a physical address 2011-09-04 15:51:46 -04:00
buf.h Revert "Introduce and use sleeplocks instead of BUSY flags" 2011-08-29 17:18:40 -04:00
BUGS
cat.c
console.c Remove unused 'state' variable that broke the build in recent gcc's 2011-09-07 16:39:27 -04:00
cuth
defs.h Make fetchint and fetchstr use proc instead of taking a struct proc 2012-02-17 23:20:13 -05:00
dot-bochsrc
echo.c
elf.h Make elf proghdr fields match what objdump prints 2011-08-17 20:23:36 -04:00
entry.S more regular kmap[] and description 2011-09-13 12:28:45 -04:00
entryother.S Fix stale comments in entryother.S 2011-09-04 15:56:16 -04:00
exec.c I can't do math; fix bug introduced in 5a9761 2011-09-03 10:21:51 -04:00
fcntl.h
file.c don't let dirty blocks be evicted from cache! 2011-10-14 10:23:23 -04:00
file.h clarify some FS comments 2011-10-11 06:41:37 -04:00
forktest.c
fs.c more FS comment clarification 2011-10-11 10:11:53 -04:00
fs.h clarify some FS comments 2011-10-11 06:41:37 -04:00
gdbutil
grep.c
ide.c clarify some FS comments 2011-10-11 06:41:37 -04:00
init.c
initcode.S Remove sys_init syscall 2011-08-22 20:05:15 -04:00
ioapic.c
kalloc.c eliminate enter_alloc -- use kalloc for everything 2011-09-13 13:14:52 -04:00
kbd.c
kbd.h
kernel.ld Nuke data.S, since we do have a custom linker script. 2011-09-02 14:51:55 -04:00
kill.c
lapic.c Fix weird pagebreak bug 2011-09-02 15:29:33 -04:00
LICENSE
ln.c
log.c don't let dirty blocks be evicted from cache! 2011-10-14 10:23:23 -04:00
ls.c
main.c Use | instead of + for entrypgdir. Linker doesn't get in our way here. 2011-09-14 13:47:04 -04:00
Makefile Re-alphabetize OBJS 2011-09-05 23:45:04 -04:00
memide.c missing file memide.c 2011-01-11 13:54:23 -05:00
memlayout.h more regular kmap[] and description 2011-09-13 12:28:45 -04:00
mkdir.c
mkfs.c Dirt simple logging 2011-07-27 20:35:46 -04:00
mmu.h Fix layout issues for printed version 2011-09-01 10:25:20 -04:00
mp.c Avoid "boot" in xv6 2011-08-15 20:11:13 -04:00
mp.h
Notes
param.h log write() data 2011-08-12 09:25:39 -04:00
picirq.c Get rid of the blank page in picirq.c. It misaligs things now. 2010-09-02 18:36:06 -04:00
pipe.c Revert "Introduce and use sleeplocks instead of BUSY flags" 2011-08-29 17:18:40 -04:00
pr.pl
printf.c
proc.c fix usertests to correctly test what happens when you call 2011-09-01 12:02:49 -04:00
proc.h junk 2012-08-28 12:57:05 -04:00
README Update year in URL 2011-09-02 16:32:46 -04:00
rm.c
runoff Fetch nice font from font branch, if possible 2011-09-07 12:38:24 -04:00
runoff.list Remove data.S from runoff, too 2011-09-02 14:52:53 -04:00
runoff.spec Note about the meaning of sheet1 in runoff.spec 2011-09-05 21:52:50 -04:00
runoff1 xv6: formatting, cleanup, rev5 (take 2) 2011-02-19 21:17:55 -05:00
sh.c
show1
sign.pl
sleep1.p
spinlock.c Revert "Introduce and use sleeplocks instead of BUSY flags" 2011-08-29 17:18:40 -04:00
spinlock.h Revert "Introduce and use sleeplocks instead of BUSY flags" 2011-08-29 17:18:40 -04:00
spinp
stat.h junk 2012-08-28 12:57:05 -04:00
stressfs.c Update stressfs to trigger race now the logging code serializes writes 2011-09-27 12:59:47 -04:00
string.c Use stosl in memset; makes boot time bearable 2011-09-01 10:41:27 -04:00
swtch.S
symlink.patch
syscall.c Make fetchint and fetchstr use proc instead of taking a struct proc 2012-02-17 23:20:13 -05:00
syscall.h Remove sys_init syscall 2011-08-22 20:05:15 -04:00
sysfile.c Make fetchint and fetchstr use proc instead of taking a struct proc 2012-02-17 23:20:13 -05:00
sysproc.c Avoid "boot" in xv6 2011-08-15 20:11:13 -04:00
timer.c
toc.ftr Update index example in TOC footer 2011-09-02 16:30:20 -04:00
toc.hdr
trap.c Map kernel high 2011-07-29 07:31:27 -04:00
trapasm.S One definition of several macros and constants 2011-08-08 13:30:08 -04:00
traps.h
TRICKS
types.h
uart.c
ulib.c make new code like old code 2011-01-11 13:01:13 -05:00
umalloc.c make new code like old code 2011-01-11 13:01:13 -05:00
user.h make new code like old code 2011-01-11 13:01:13 -05:00
usertests.c Fix compile error on newer gcc's 2011-09-30 15:28:33 -04:00
usys.S uptime() sys call for benchmarking 2010-08-11 14:34:45 -04:00
vectors.pl
vm.c eliminate enter_alloc -- use kalloc for everything 2011-09-13 13:14:52 -04:00
wc.c junk 2012-08-28 12:57:05 -04:00
x86.h Remove unused x86.h definitions 2011-09-02 14:52:13 -04:00
zombie.c

README 

xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix
Version 6 (v6).  xv6 loosely follows the structure and style of v6,
but is implemented for a modern x86-based multiprocessor using ANSI C.

ACKNOWLEDGMENTS

xv6 is inspired by John Lions's Commentary on UNIX 6th Edition (Peer
to Peer Communications; ISBN: 1-57398-013-7; 1st edition (June 14,
2000)). See also http://pdos.csail.mit.edu/6.828/2007/v6.html, which
provides pointers to on-line resources for v6.

xv6 borrows code from the following sources:
    JOS (asm.h, elf.h, mmu.h, bootasm.S, ide.c, console.c, and others)
    Plan 9 (entryother.S, mp.h, mp.c, lapic.c)
    FreeBSD (ioapic.c)
    NetBSD (console.c)

The following people made contributions:
    Russ Cox (context switching, locking)
    Cliff Frey (MP)
    Xiao Yu (MP)
    Nickolai Zeldovich
    Austin Clements

In addition, we are grateful for the patches contributed by Greg
Price, Yandong Mao, and Hitoshi Mitake.

The code in the files that constitute xv6 is
Copyright 2006-2011 Frans Kaashoek, Robert Morris, and Russ Cox.

ERROR REPORTS

If you spot errors or have suggestions for improvement, please send
email to Frans Kaashoek and Robert Morris (kaashoek,rtm@csail.mit.edu). 

BUILDING AND RUNNING XV6

To build xv6 on an x86 ELF machine (like Linux or FreeBSD), run "make".
On non-x86 or non-ELF machines (like OS X, even on x86), you will
need to install a cross-compiler gcc suite capable of producing x86 ELF
binaries.  See http://pdos.csail.mit.edu/6.828/2011/tools.html.
Then run "make TOOLPREFIX=i386-jos-elf-".

To run xv6, you can use Bochs or QEMU, both PC simulators.
Bochs makes debugging easier, but QEMU is much faster. 
To run in Bochs, run "make bochs" and then type "c" at the bochs prompt.
To run in QEMU, run "make qemu".

To create a typeset version of the code, run "make xv6.pdf".  This
requires the "mpage" utility.  See http://www.mesa.nl/pub/mpage/.