Port of Xv6 for 25∞2
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2007-08-24 20:28:08 +00:00
.cvsignore New formatting scripts. 2006-09-05 15:50:55 +00:00
8253pit.c xv6 style 2006-09-08 14:41:18 +00:00
asm.h wrap long lines 2006-09-06 19:08:14 +00:00
bio.c nits 2007-08-24 19:46:19 +00:00
bootasm.S bring bootasm and bootother more in sync 2007-08-24 19:25:52 +00:00
bootmain.c nits 2007-08-24 20:28:08 +00:00
bootother.S bring bootasm and bootother more in sync 2007-08-24 19:25:52 +00:00
buf.h simplify ide queuing 2007-08-24 19:32:36 +00:00
BUGS tweaks 2007-08-22 06:20:10 +00:00
cat.c Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
console.c nits 2007-08-24 20:28:08 +00:00
defs.h simplify ide queuing 2007-08-24 19:32:36 +00:00
dev.h remove _ prefixes 2006-09-07 13:08:23 +00:00
dot-bochsrc update 2006-07-26 10:17:39 +00:00
echo.c Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
elf.h more comments 2006-09-07 14:12:30 +00:00
exec.c PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
fcntl.h low-level keyboard input (not hooked up to /dev yet) 2006-08-10 02:07:10 +00:00
file.c PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
file.h PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
forktest.c test that fork fails gracefully 2007-08-24 20:20:23 +00:00
fs.c nits 2007-08-24 19:46:19 +00:00
fs.h comment nits 2007-08-24 19:52:49 +00:00
fsvar.h comment nits 2007-08-24 19:52:49 +00:00
ide.c comment nits 2007-08-24 19:52:49 +00:00
init.c Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
initcode.S finish comments 2007-08-24 19:37:24 +00:00
ioapic.c formatting nits 2006-09-08 15:14:43 +00:00
ioapic.h wrap long lines 2006-09-06 19:08:14 +00:00
kalloc.c simplify ide queuing 2007-08-24 19:32:36 +00:00
kbd.h formatting; split kbd constants into kbd.h 2007-08-14 19:31:16 +00:00
kill.c add kill 2007-08-08 08:50:23 +00:00
lapic.c replace bogus loops with slightly less bogus loops. 2007-08-10 17:05:46 +00:00
ln.c add ln 2007-08-22 05:54:55 +00:00
ls.c Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
main.c tweak 2007-08-24 19:36:52 +00:00
Makefile test that fork fails gracefully 2007-08-24 20:20:23 +00:00
mkdir.c more comments 2006-09-07 14:12:30 +00:00
mkfs.c add missing iput() at end of _namei() 2007-08-24 14:56:17 +00:00
mmu.h formatting 2007-08-14 19:41:38 +00:00
mp.c nit 2006-09-08 15:15:44 +00:00
mp.h wrap long lines 2006-09-06 19:08:14 +00:00
Notes nit in console interrupts 2006-09-07 00:00:33 +00:00
param.h simplify ide queuing 2007-08-24 19:32:36 +00:00
picirq.c fix ide, pit interfaces 2006-09-07 15:29:54 +00:00
pipe.c i cannot prove that release before wakeup is wrong, but i cannot convince myself it is right either 2007-08-14 19:10:57 +00:00
pr.pl runoff changes 2006-09-08 13:53:18 +00:00
printf.c avoid assignments in declarations 2007-08-10 17:17:42 +00:00
proc.c nits 2007-08-24 20:28:08 +00:00
proc.h nits 2007-08-24 20:28:08 +00:00
README 2007 2007-08-08 10:27:15 +00:00
rm.c fix error message 2007-08-08 09:30:58 +00:00
runoff add missing iput() at end of _namei() 2007-08-24 14:56:17 +00:00
runoff.list tweaks 2007-08-22 06:20:10 +00:00
runoff.spec PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
runoff1 PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
setjmp.S make setjmp fit on one page 2006-09-08 14:20:43 +00:00
sh.c Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
show1 PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
sign.pl spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 17:04:06 +00:00
spinlock.c Reorder spinlock.c: acquire and release first 2007-08-24 20:06:14 +00:00
spinlock.h more comments 2006-09-07 14:12:30 +00:00
stat.h more comments 2006-09-07 14:12:30 +00:00
string.c Various cleanup: 2007-08-21 19:22:08 +00:00
syscall.c nits 2007-08-24 20:28:08 +00:00
syscall.h Add yield system call, for zombie test program (bad idea?). 2007-08-24 20:04:53 +00:00
sysfile.c PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
sysproc.c Add yield system call, for zombie test program (bad idea?). 2007-08-24 20:04:53 +00:00
toc.ftr fix toc example 2006-09-08 15:39:24 +00:00
toc.hdr runoff changes 2006-09-08 13:53:18 +00:00
trap.c PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
trapasm.S PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
traps.h typo 2007-08-08 08:27:32 +00:00
types.h align 2007-08-24 20:27:47 +00:00
ulib.c Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
umalloc.c avoid assignments in declarations 2007-08-10 17:17:42 +00:00
user.h Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
usertests.c test that fork fails gracefully 2007-08-24 20:20:23 +00:00
usys.S Add yield system call, for zombie test program (bad idea?). 2007-08-24 20:04:53 +00:00
vectors.pl PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
x86.h comment what +m means; omit needless __ 2007-08-24 00:34:54 +00:00
xv6-rev0.tar.gz dist tarball 2006-09-08 15:44:42 +00:00
xv6.pdf sent to printer - CTC job 6955 40 copies 2006-09-08 15:55:26 +00:00
xv6.ps a copy of xv6.pdf that can be sent to turkey and duplexes correctly 2006-09-08 16:19:26 +00:00
zombie.c Add yield system call, for zombie test program (bad idea?). 2007-08-24 20:04:53 +00:00

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.

ACKNOWLEDGEMENTS

xv6 is inspired by John Lions' 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 (bootother.S, mp.h, mp.c, ioapic.h, lapic.c)
    FreeBSD (ioapic.c)
    NetBSD (console.c)

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

The code in the files that constitute xv6 are 
Copyright 2006-2007 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).  This version is the very first one,
so don't be surprised if there are errors or the code is unclear.

BUIDLING 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/6.828/2007/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".  Both log the xv6 screen output to 
standard output.

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