Port of Xv6 for 25∞2
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2007-08-08 10:32:32 +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 refactor bget to be more like iget - make it clear that sleep loops 2007-08-08 09:50:26 +00:00
bootasm.S shorten 2006-09-08 15:31:23 +00:00
bootmain.c wrap long lines 2006-09-06 19:08:14 +00:00
bootother.S wrap long lines 2006-09-06 19:08:14 +00:00
buf.h some comment changes 2006-09-08 14:36:44 +00:00
BUGS notes 2007-08-08 10:32:32 +00:00
cat.c standardize various * conventions 2006-09-06 17:27:19 +00:00
console.c check p->killed for long-lived sleeps 2007-08-08 10:29:42 +00:00
defs.h help gcc 2007-08-08 10:27:04 +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 i/o redirection in sh 2006-08-23 01:09:24 +00:00
elf.h more comments 2006-09-07 14:12:30 +00:00
fcntl.h low-level keyboard input (not hooked up to /dev yet) 2006-08-10 02:07:10 +00:00
file.c stop using fd to name files 2006-09-08 13:44:42 +00:00
file.h fd.* -> file.* 2006-09-06 18:40:28 +00:00
fs.c move ialloc body up, avoiding double check for end of loop 2007-08-08 09:53:46 +00:00
fs.h tweak fs.h spacing; add comment 2006-09-08 14:31:17 +00:00
fsvar.h comments 2006-09-07 15:31:33 +00:00
ide.c move ide_intr lower 2006-09-08 14:33:27 +00:00
init.c watch for zombies 2007-08-08 08:57:03 +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 some comment changes 2006-09-08 14:36:44 +00:00
kill.c add kill 2007-08-08 08:50:23 +00:00
lapic.c formatting nits 2006-09-08 15:14:43 +00:00
ls.c make ls work on directories 2007-08-08 09:17:09 +00:00
main.c missing void 2007-08-08 09:32:39 +00:00
Makefile add kill 2007-08-08 08:50:23 +00:00
mkdir.c more comments 2006-09-07 14:12:30 +00:00
mkfs.c quiet 2006-09-08 13:44:56 +00:00
mmu.h spacing 2007-08-08 09:12:53 +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 struct fd -> struct file 2006-09-06 18:38:56 +00:00
picirq.c fix ide, pit interfaces 2006-09-07 15:29:54 +00:00
pipe.c check p->killed for long-lived sleeps 2007-08-08 10:29:42 +00:00
pr.pl runoff changes 2006-09-08 13:53:18 +00:00
printf.c no /* */ comments 2006-09-06 17:50:20 +00:00
proc.c check p->killed for long-lived sleeps 2007-08-08 10:29:42 +00:00
proc.h save process name for debugging 2007-08-08 08:38:11 +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 fix index bug 2007-08-08 09:29:18 +00:00
runoff.list add bootmain.c to runoff.list 2007-08-08 07:41:30 +00:00
runoff1 tweaks 2006-09-08 14:40:59 +00:00
setjmp.S make setjmp fit on one page 2006-09-08 14:20:43 +00:00
sh.c handle EOF in shell 2007-08-08 08:39:07 +00:00
sign.pl spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 17:04:06 +00:00
spinlock.c make lines shorter 2006-09-08 15:18:58 +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 add safestrcpy 2007-08-08 08:37:22 +00:00
syscall.c convert syscall dispatch to table 2007-08-08 09:41:21 +00:00
syscall.h refactor syscall code 2006-09-07 14:13:26 +00:00
sysfile.c save process name for debugging 2007-08-08 08:38:11 +00:00
sysproc.c refactor syscall code 2006-09-07 14:13:26 +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 add DPL_USER constant 2007-08-08 09:02:42 +00:00
trapasm.S standardize various * conventions 2006-09-06 17:27:19 +00:00
traps.h typo 2007-08-08 08:27:32 +00:00
types.h uint32_t -> uint &c 2006-07-20 09:07:53 +00:00
ulib.c standardize on not using unsigned keyword 2007-08-08 09:30:48 +00:00
umalloc.c standardize various * conventions 2006-09-06 17:27:19 +00:00
user.h standardize on not using unsigned keyword 2007-08-08 09:30:48 +00:00
usertests.c missing void 2007-08-08 09:32:39 +00:00
usys.S standardize various * conventions 2006-09-06 17:27:19 +00:00
vectors.pl no /* */ comments 2006-09-06 17:50:20 +00:00
x86.h more comments 2006-09-07 14:12:30 +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 spacing 2007-08-08 08:44:11 +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/.