ilo-pona/xv6-65oo2
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Author SHA1 Message Date
Austin Clements 97657d703f Add -fno-omit-frame-pointer to compile flags. 
At some point between gcc 4.4 and 4.6, omitting the frame pointer
became default if any -O is specified.  getcallerpcs relies on the
frame pointer, so bring it back.
 2011-06-24 14:22:19 -04:00
Russ Cox cf4b1ad90b xv6: formatting, cleanup, rev5 (take 2) 2011-02-19 21:17:55 -05:00
Russ Cox 89bfdd4db1 multiboot support and memory-only (no disk) kernel 2011-01-11 13:27:45 -05:00
Austin Clements 124fe7e457 Rev 4 2010-09-03 15:47:28 -04:00
Austin Clements 41c4bbb505 Make it easy to change the number of CPUs 2010-09-01 02:14:35 -04:00
Austin Clements 51e2a7b324 print depends on runoff.spec 2010-08-31 17:30:31 -04:00
Austin Clements 880ee18ab1 mkfs must be compiled 32-bit. Fix mkfs warnings 2010-08-31 15:11:10 -04:00
Austin Clements 1e8035be53 Infer qemu path, just like in JOS 2010-08-31 15:05:27 -04:00
Austin Clements 0f0456ec53 Infer TOOLPREFIX, just like in JOS 2010-08-31 15:01:26 -04:00
Robert Morris 81b30b14d6 Merge remote branch 'origin/master' into page 2010-08-30 15:30:53 -04:00
Austin Clements fe4623b99c Fix for gdbstub argument change in qemu 0.11. Rename qemu-gdb-nox target to qemu-nox-gdb because you frequently want to add the gdb part, but rarely the nox part. 2010-08-30 12:22:08 -04:00
Robert Morris eb18645f17 fix allocuvm() to handle sbrk() with non-page-granularity argument 
(maybe this never worked, but it works now)
 2010-08-05 12:10:54 -04:00
Frans Kaashoek 40889627ba Initial version of single-cpu xv6 with page tables 2010-07-02 14:51:53 -04:00
Austin Clements 5e710e688e Add stressfs and gdbutil to dist 2009-11-23 17:50:58 -05:00
Austin Clements f4c12f116d Add the test we used in lecture to creash the IDE system when the 
locks were moved around.
 2009-11-23 17:27:26 -05:00
Austin Clements 77a9aa55cd Record debug info for assmebly code 2009-10-05 13:20:23 -04:00
Austin Clements bab819ed8d Be consistent with JOS make targets 2009-09-30 22:09:48 -04:00
Austin Clements 01396b3a87 xv6 runs the console on the serial port, not the parallel port 2009-09-20 23:07:59 -04:00
Silas Boyd-Wickizer 074ac7ccd4 add .gdbinit.tmpl to dist 2009-09-15 19:15:59 -04:00
Silas Boyd-Wickizer 01b667e45d rev3 2009-09-15 17:21:14 -04:00
Silas Boyd-Wickizer 568bbae801 qemu-gdb target and script 2009-09-15 17:15:36 -04:00
Russ Cox 7e0cc8e36e another attempt at cpu-local variables. 
this time do it ourselves instead of piggybacking on TLS.
add -fno-pic to Makefile; pic code breaks our fake TLS.
 2009-09-02 10:07:59 -07:00
Nickolai Zeldovich 45a9782636 fix bootblock build with gcc 4.4 2009-09-02 02:03:46 -04:00
Russ Cox 48755214c9 assorted fixes: 
* rename c/cp to cpu/proc
 * rename cpu.context to cpu.scheduler
 * fix some comments
 * formatting for printout
 2009-08-30 23:02:08 -07:00
Russ Cox 0aef891495 shuffle and tweak for formatting. 
pdf has very good page breaks now.
would be a good copy for fall 2009.
 2009-08-08 01:07:30 -07:00
rsc 19333efb9e Some proc cleanup, moving some of copyproc into allocproc. 
Also, an experiment: use "thread-local" storage for c and cp
instead of the #define macro for curproc[cpu()].
 2009-05-31 00:28:45 +00:00
rtm adcd16c3f7 restore std toolprefix 2008-09-11 10:22:01 +00:00
rtm 4651d04ad1 omit *.d from tar file 2008-09-11 10:20:40 +00:00
rsc 1808b2f1b3 now rev2 2008-08-20 18:00:35 +00:00
nelhage d7a90d3b5c This should fix building on FreeBSD 2007-09-19 23:49:52 +00:00
nelhage 6197c04208 Fix compilation on 64-bit machines (thanks to andersk for patch) 2007-09-18 00:41:34 +00:00
rsc e51ae8a272 do not toss .ps 2007-08-30 18:33:48 +00:00
rsc 05109382d6 tweak 2007-08-30 14:12:19 +00:00
rsc 68a2d5373d match README 2007-08-28 19:30:29 +00:00
rsc e3f271e880 oops 2007-08-28 17:48:44 +00:00
rsc 818fc0125e replace setjmp/longjmp with swtch 2007-08-28 12:48:33 +00:00
rsc 2d7d2b18cf rename 8253pit -> timer 2007-08-28 04:41:20 +00:00
rsc 1a89baa7c6 add grep; add lost echo 2007-08-28 04:26:34 +00:00
rsc 76f09d7dd0 clean up Makefile; add wc 2007-08-28 04:20:40 +00:00
rsc f0d11fea82 Move keyboard code into kbd.c; add backspace handling. 2007-08-28 03:28:13 +00:00
rsc 19b42cc078 Rename main0 to main. 2007-08-27 23:32:16 +00:00
rsc e0e7d07e5a test that fork fails gracefully 2007-08-24 20:20:23 +00:00
rsc 6bf2e5c898 add ln 2007-08-22 05:54:55 +00:00
rsc f32f3638f4 Various cleanup: 
- Got rid of dummy proc[0].  Now proc[0] is init.
 - Added initcode.S to exec /init, so that /init is
   just a regular binary.
 - Moved exec out of sysfile to exec.c
 - Moved code dealing with fs guts (like struct inode)
   from sysfile.c to fs.c.  Code dealing with system call
   arguments stays in sysfile.c
 - Refactored directory routines in fs.c; should be simpler.
 - Changed iget to return *unlocked* inode structure.
   This solves the lookup-then-use race in namei
   without introducing deadlocks.
   It also enabled getting rid of the dummy proc[0].
 2007-08-21 19:22:08 +00:00
rsc e0924827ee add kill 2007-08-08 08:50:23 +00:00
rsc af689dcf7e oops 2007-08-08 08:40:08 +00:00
rsc 349ee132f0 add zombie program 2007-08-08 08:38:55 +00:00
rsc ca3d577671 add rule to generate init.sym 2007-08-08 07:43:02 +00:00
rsc b438eff6bf Have kernel build rule create kernel.sym, which can be 
used in Bochs to make breakpoint setting easier:

	load-symbols "kernel.sym"
	vb 0x8:"main0"
	c
	disasm/25 "main0"
	vb 0x8:"main0"+0x5f
	c

etc.
 2006-09-17 19:21:12 +00:00
rsc db2d8e4b82 dist rules 2006-09-08 14:41:06 +00:00
kaashoek 5692823b1f minor makefile fixes for printing 
cut last line of readme so that readme fits on single page
 2006-09-07 21:03:13 +00:00
rsc 339a9beaf5 new targets bochs and qemu 2006-09-07 20:06:15 +00:00
kaashoek 52253dce65 remove fstest 2006-09-07 14:17:30 +00:00
rsc 7e019461c8 fix build 2006-09-07 14:10:52 +00:00
kaashoek a64cd81342 one regression test program 2006-09-07 13:23:41 +00:00
rsc 94d7e25975 avoid system binary clashes 2006-09-07 13:07:39 +00:00
kaashoek f70172129c run without lapic and ioapic, if they are not present 
if no lapic available, use 8253pit for clock
now xv6 runs both on qemu (uniprocessor) and bochs (uniprocessor and MP)
 2006-09-07 01:37:58 +00:00
rsc 2a55cc5501 runoff tweaks 2006-09-06 19:22:24 +00:00
rsc f3fc72c5b6 clean up after mkfs 2006-09-06 19:11:39 +00:00
rsc 9936bffa45 fd.* -> file.* 2006-09-06 18:40:28 +00:00
rsc 61d03d0eef rm rm 2006-09-06 18:18:43 +00:00
kaashoek d49a2d5386 nits 2006-09-06 01:25:41 +00:00
rsc fae7779da7 New formatting scripts. 
The use/defs extraction in runoff still needs some work
for xv6 code style.
 2006-09-05 15:50:55 +00:00
kaashoek 97a5bba6d2 index for printout 
some cleanup
 2006-09-03 14:38:10 +00:00
rtm dfcc5b997c prune unneeded panics and debug output 2006-08-29 19:06:37 +00:00
kaashoek d7ce6545e7 better printout 2006-08-29 17:50:19 +00:00
kaashoek b52151e032 some text in readme 
generate postscript printout
 2006-08-28 18:31:33 +00:00
kaashoek ea2909b6b5 user-level malloc (untested) 
nit in sbrk
indirect block
fix dup to share fd struct
 2006-08-24 02:44:41 +00:00
rtm ceb0e42796 proc[0] can sleep(), at least after it gets to main00() 
proc[0] calls iget(rootdev, 1) before forking init
 2006-08-16 01:56:00 +00:00
rtm 350e63f7a9 no more proc[] entry per cpu for idle loop 
each cpu[] has its own gdt and tss
no per-proc gdt or tss, re-write cpu's in scheduler (you win, cliff)
main0() switches to cpu[0].mpstack
 2006-08-15 22:18:20 +00:00
kaashoek d7b3b802f4 user-level programs: mkdir and rm 
shell parses arguments (very simplistic)
readme version of README (sh doesn't deal with capital characters)
printf recognizes %c
nicer output format for ls
 2006-08-14 21:22:13 +00:00
kaashoek 1f544842ce fstat 
primitive ls
 2006-08-12 04:33:50 +00:00
rtm 17a856577f init creates console, opens 0/1/2, runs sh 
sh accepts 0-argument commands (like userfs)
reads from console
 2006-08-11 13:55:18 +00:00
kaashoek 28d9ef04dd printf 
convert userfs to use printf
bfree
ifree
writei
start on unlink
 2006-08-10 01:28:57 +00:00
rtm 0e84a0ec6e fix race in holding() check in acquire() 
give cpu1 a TSS and gdt for when it enters scheduler()
and a pseudo proc[] entry for each cpu
cpu0 waits for each other cpu to start up
read() for files
 2006-08-08 19:58:06 +00:00
kaashoek c8b29f6d03 better interrupt plan---this one appears to work 
ioapic
 2006-08-04 18:12:31 +00:00
rtm 8455980b27 exec arguments 2006-07-28 22:33:07 +00:00
rtm c59361f143 primitive exec 2006-07-27 21:10:00 +00:00
rtm 11a9947f1a bread 
iget
mkfs makes a file system image
put this in your .bochsrc:
ata0-slave: type=disk, mode=flat, path="fs.img", cylinders=1024, heads=1, spt=1
 2006-07-21 13:18:04 +00:00
rsc 857d60cb0c cleaner 2006-07-17 01:51:47 +00:00
rsc f15a3ae263 cleaner 2006-07-17 01:36:32 +00:00
rsc 8a7eb80e47 fix main return type 2006-07-16 16:03:51 +00:00
rsc b903b693ec tidy up 2006-07-16 15:35:18 +00:00
kaashoek f27a68a24a extract lapic code from mp.c 2006-07-12 17:00:54 +00:00
rsc 5ce9751cab Changes to allow use of native x86 ELF compilers, which on my 
Linux 2.4 box using gcc 3.4.6 don't seem to follow the same
conventions as the i386-jos-elf-gcc compilers.
Can run make 'TOOLPREFIX=' or edit the Makefile.

curproc[cpu()] can now be NULL, indicating that no proc is running.
This seemed safer to me than having curproc[0] and curproc[1]
both pointing at proc[0] potentially.

The old implementation of swtch depended on the stack frame layout
used inside swtch being okay to return from on the other stack
(exactly the V6 you are not expected to understand this).
It also could be called in two contexts: at boot time, to schedule
the very first process, and later, on behalf of a process, to sleep
or schedule some other process.

I split this into two functions: scheduler and swtch.

The scheduler is now a separate never-returning function, invoked
by each cpu once set up.  The scheduler looks like:

	scheduler() {
		setjmp(cpu.context);

		pick proc to schedule
		blah blah blah

		longjmp(proc.context)
	}

The new swtch is intended to be called only when curproc[cpu()] is not NULL,
that is, only on behalf of a user proc.  It does:

	swtch() {
		if(setjmp(proc.context) == 0)
			longjmp(cpu.context)
	}

to save the current proc context and then jump over to the scheduler,
running on the cpu stack.

Similarly the system call stubs are now in assembly in usys.S to avoid
needing to know the details of stack frame layout used by the compiler.

Also various changes in the debugging prints.
 2006-07-11 01:07:40 +00:00
kaashoek 7837c71b32 disable all interrupts when acquiring lock 
user program that makes a blocking system call
 2006-07-06 21:47:22 +00:00
rtm 8b4e2a08fe swtch saves callee-saved registers 
swtch idles on per-CPU stack, not on calling process's stack
fix pipe bugs
usertest.c tests pipes, fork, exit, close
 2006-07-01 21:26:01 +00:00
rtm c41f1de5d4 file descriptors 
pipes
 2006-06-27 14:35:53 +00:00
rtm bf3903612d system call arguments 2006-06-26 15:11:19 +00:00
rtm df5cc91659 compile "user programs" 
curproc array
 2006-06-22 20:47:23 +00:00
kaashoek 21a88fd487 checkpoint. booting second processor. stack is messed up, but thanks to cliff 
and plan 9 code, at least boots and gets into C code.
 2006-06-22 01:28:57 +00:00
kaashoek 7baa34a421 start on MP; detect MP configuration 2006-06-21 01:53:07 +00:00
rtm ae6e8aa730 checkpoint 2006-06-16 20:29:25 +00:00
rtm be0a7eacda sleep, wakeup, wait, exit 2006-06-15 19:58:01 +00:00
rtm a4c03dea09 primitive fork and exit system calls 2006-06-15 16:02:20 +00:00
rtm 0a70d042d0 more or less take traps/interrupts 2006-06-13 15:50:06 +00:00
rtm 70a895f63c xx 2006-06-12 15:27:13 +00:00
rtm 55e95b16db import 2006-06-12 15:22:12 +00:00