Commit graph

29 commits

Author SHA1 Message Date
rsc 0cfc7290e8 wrap long lines 2006-09-06 19:08:14 +00:00
rsc 236d33698b weird spacing 2006-09-06 18:47:48 +00:00
rsc 9e9bcaf143 standardize various * conventions 2006-09-06 17:27:19 +00:00
rsc a650c606fe spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 17:04:06 +00:00
kaashoek 97c74a3a64 nits 2006-09-03 18:32:58 +00:00
kaashoek 1be7668537 fix bugs in indirect-file code
clean up test program
2006-08-24 17:28:01 +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
kaashoek 8b58e81077 i/o redirection in sh
better parsing of sh commands (copied from jos sh)
cat: read from 1 if no args
sbrk system call, but untested
getpid system call
moved locks in keyboard intr, but why do we get intr w. null characters from keyboard?
2006-08-23 01:09:24 +00:00
kaashoek 16083d4462 removed block system call
renumber system calls (run gmake clean!)
skeleton for dup system call
2006-08-20 03:08:54 +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 d15f0d1033 start on mkdir
stat
2006-08-14 03:00:13 +00:00
kaashoek c372e8dc34 zero freed blocks
multi-block directories
track size of directory (size = number entries in use)
should namei (and other code that scans through directories) scan through all blocks of a directory and not use size?
2006-08-13 05:28:04 +00:00
kaashoek 1f544842ce fstat
primitive ls
2006-08-12 04:33:50 +00:00
kaashoek 0633b9715e unlink,mknod,create with multi-component pathnames should work now
remove console init code from userfs
2006-08-12 01:25:45 +00:00
kaashoek 24437cd554 fix deadlock---iput(dp) asap
working unlink, but doesn't free dir blocks that become empty
remove out-of-date comment in ioapic
2006-08-11 18:18:38 +00:00
rtm 8a8be1b8c3 low-level keyboard input (not hooked up to /dev yet)
fix acquire() to cli() *before* incrementing nlock
make T_SYSCALL a trap gate, not an interrupt gate
sadly, various crashes if you hold down a keyboard key...
2006-08-10 02:07:10 +00:00
kaashoek 28d9ef04dd printf
convert userfs to use printf
bfree
ifree
writei
start on unlink
2006-08-10 01:28:57 +00:00
kaashoek 939f9edeac iread for T_DEV
O_RDWR, etc.
create file
2006-08-09 19:25:20 +00:00
kaashoek 2601de0032 fix test program: don't close before writing
set fd to writeable on open for write
2006-08-09 17:25:10 +00:00
kaashoek 6fa5ffb56f devsw
checkpoint: write(fd,"hello\n",6) where fd is a console dev almost works
2006-08-09 16:04:04 +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 e8d11c2e84 mknod,ialloc,iupdate 2006-08-08 18:07:37 +00:00
rtm 32630628a9 open() 2006-07-29 09:35:02 +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
rsc c54c79267f nitpicks 2006-07-17 01:25:22 +00:00
rsc 9b37d1bfaa Add user.h for prototypes.
Add cons_puts for cleaner output.
2006-07-16 15:36:31 +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 084f21430c oops 2006-07-10 16:27:15 +00:00