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Russ Cox 2de1c550ca trap cleanup 
IRQ_OFFSET -> T_IRQ0 (a trap number not an IRQ number)
T_SYSCALL 0x30 -> 0x40 (move out of IRQ range)
 		2009-07-11 19:24:56 -07:00
web Add MIT license file; update xv6-rev2.tar.gz with LICENSE. 2009-05-26 16:58:33 +00:00
.cvsignore update .cvsignore 2008-10-15 04:54:24 +00:00
BUGS sh 2007-09-05 15:55:43 +00:00
LICENSE Add MIT license file; update xv6-rev2.tar.gz with LICENSE. 2009-05-26 16:58:33 +00:00
LucidaSans-Typewriter83 add nice font 2008-08-20 18:00:24 +00:00
Makefile Some proc cleanup, moving some of copyproc into allocproc. 2009-05-31 00:28:45 +00:00
Notes nit in console interrupts 2006-09-07 00:00:33 +00:00
README spelling 2007-08-29 18:18:57 +00:00
TRICKS fork minibug 2007-11-28 20:47:22 +00:00
asm.h continuous quality management 2007-08-31 19:55:27 +00:00
bio.c group locks into structs they protect. 2009-05-31 05:12:21 +00:00
bootasm.S bootasm cleanup 2009-07-11 19:15:32 -07:00
bootmain.c xv6: boot loader adjustments 2009-03-08 21:41:30 +00:00
bootother.S bootasm cleanup 2009-07-11 19:15:32 -07:00
buf.h Another attempt at the bio.c comment. 2007-08-27 14:09:30 +00:00
cat.c more consistent spacing 2007-08-28 18:32:08 +00:00
console.c group locks into structs they protect. 2009-05-31 05:12:21 +00:00
cuth delete unnecessary #include lines 2007-08-27 23:26:33 +00:00
defs.h move fork into proc.c 2009-05-31 00:38:51 +00:00
dev.h Change dev read/write functions 2007-08-28 17:49:49 +00:00
dot-bochsrc make bochsrc work for bochs 2.2.6 2008-09-03 14:10:47 +00:00
echo.c Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
elf.h clumsy blank pages to make some files align better 2007-08-28 05:00:39 +00:00
exec.c exec sanity check 2009-05-31 02:11:27 +00:00
fcntl.h nit 2007-08-28 04:13:24 +00:00
file.c group locks into structs they protect. 2009-05-31 05:12:21 +00:00
file.h simplify 2009-05-31 02:07:51 +00:00
forktest.c test that fork fails gracefully 2007-08-24 20:20:23 +00:00
fs.c group locks into structs they protect. 2009-05-31 05:12:21 +00:00
fs.h drop NADDRS and INDIRECT; too many names 2009-05-31 00:59:37 +00:00
fsvar.h drop NADDRS and INDIRECT; too many names 2009-05-31 00:59:37 +00:00
grep.c add grep; add lost echo 2007-08-28 04:26:34 +00:00
ide.c group locks into structs they protect. 2009-05-31 05:12:21 +00:00
init.c group locks into structs they protect. 2009-05-31 05:12:21 +00:00
initcode.S Rename main0 to main. 2007-08-27 23:32:16 +00:00
ioapic.c trap cleanup 2009-07-11 19:24:56 -07:00
kalloc.c group locks into structs they protect. 2009-05-31 05:12:21 +00:00
kbd.c be consistent: no underscores in function names 2009-03-08 22:07:13 +00:00
kbd.h formatting; split kbd constants into kbd.h 2007-08-14 19:31:16 +00:00
kill.c tab police 2009-05-31 00:39:17 +00:00
lapic.c trap cleanup 2009-07-11 19:24:56 -07:00
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 Some proc cleanup, moving some of copyproc into allocproc. 2009-05-31 00:28:45 +00:00
mkdir.c more consistent spacing 2007-08-28 18:32:08 +00:00
mkfs.c drop NADDRS and INDIRECT; too many names 2009-05-31 00:59:37 +00:00
mmu.h don't call it ss - that's the stack segment 2007-09-27 16:47:50 +00:00
mp.c be consistent: no underscores in function names 2009-03-08 22:07:13 +00:00
mp.h Simplify MP hardware code. 2007-08-27 22:53:31 +00:00
param.h simplify ide queuing 2007-08-24 19:32:36 +00:00
picirq.c trap cleanup 2009-07-11 19:24:56 -07:00
pipe.c simplify 2009-05-31 02:07:51 +00:00
pr.pl runoff changes 2006-09-08 13:53:18 +00:00
printf.c spaces around else for rtm 2007-08-28 18:37:41 +00:00
proc.c compile fixes 2009-05-31 05:13:51 +00:00
proc.h group locks into structs they protect. 2009-05-31 05:12:21 +00:00
rm.c more consistent spacing 2007-08-28 18:32:08 +00:00
runoff minor cleanup with STUB macro 2008-10-12 19:54:11 +00:00
runoff.list usys.S: put before init.c, STUB -> SYSCALL 2009-05-31 02:14:04 +00:00
runoff.spec nits 2007-08-28 05:01:04 +00:00
runoff1 PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
sh.c clumsy cd 2007-08-30 18:30:26 +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
sleep1.p Model verifying that wakeup really 2007-10-12 04:21:04 +00:00
spinlock.c Some proc cleanup, moving some of copyproc into allocproc. 2009-05-31 00:28:45 +00:00
spinlock.h formatting updates 2008-08-20 18:00:13 +00:00
spinp Model verifying that wakeup really 2007-10-12 04:21:04 +00:00
stat.h move T_DIR etc into stat.h; move type up 2009-05-31 00:26:10 +00:00
string.c xv6: use stosb for memset 2009-03-08 21:38:30 +00:00
swtch.S cleaner swtch.S 2008-10-15 05:14:10 +00:00
symlink.patch symlink implementation 2007-08-30 18:36:38 +00:00
syscall.c spaces around else for rtm 2007-08-28 18:37:41 +00:00
syscall.h Replace yield system call with sleep. 2007-08-27 13:34:35 +00:00
sysfile.c simplify 2009-05-31 02:07:51 +00:00
sysproc.c move fork into proc.c 2009-05-31 00:38:51 +00:00
timer.c be consistent: no underscores in function names 2009-03-08 22:07:13 +00:00
toc.ftr nits 2007-08-28 19:25:04 +00:00
toc.hdr nits 2007-08-28 18:23:48 +00:00
trap.c s/IRQ_OFFSET/T_IRQ0/: it's a trap number, not an irq number. 2009-07-11 18:17:32 -07:00
trapasm.S clean up %fs %gs use 2009-05-31 01:12:08 +00:00
traps.h s/IRQ_OFFSET/T_IRQ0/: it's a trap number, not an irq number. 2009-07-11 18:17:32 -07:00
types.h align 2007-08-24 20:27:47 +00:00
uart.c tab police 2009-05-31 00:39:17 +00:00
ulib.c xv6: use stosb for memset 2009-03-08 21:38:30 +00:00
umalloc.c spaces around else for rtm 2007-08-28 18:37:41 +00:00
user.h add struct stat decl 2007-08-28 04:20:25 +00:00
usertests.c group locks into structs they protect. 2009-05-31 05:12:21 +00:00
usys.S usys.S: put before init.c, STUB -> SYSCALL 2009-05-31 02:14:04 +00:00
vectors.pl sync with c; .text is implied 2009-05-31 01:00:38 +00:00
wc.c more consistent spacing 2007-08-28 18:32:08 +00:00
x86.h clean up %fs %gs use 2009-05-31 01:12:08 +00:00
xv6-rev0.tar.gz dist tarball 2006-09-08 15:44:42 +00:00
xv6-rev1.tar.gz DO NOT MAIL: xv6-rev1 2007-08-30 14:11:21 +00:00
xv6-rev2.tar.gz Add MIT license file; update xv6-rev2.tar.gz with LICENSE. 2009-05-26 16:58:33 +00:00
xv6.pdf make pdf, ps, tarball 2008-09-03 14:05:52 +00:00
xv6.ps make pdf, ps, tarball 2008-09-03 14:05:52 +00:00
zombie.c delete unnecessary #include lines 2007-08-27 23:26:33 +00:00

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 (bootother.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)

The code in the files that constitute xv6 is
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). 

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/6.828/2007/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/.