135e2/xv6-labs.git - xv6-labs-2024-winter

Age	Commit message (Collapse)	Author	Files	Lines
2007-08-28	Move keyboard code into kbd.c; add backspace handling.	rsc	1	-128/+108

2007-08-27	delete unnecessary #include lines	rsc	1	-3/+3

2007-08-24	nits	rsc	1	-16/+18

2007-08-14	fixes	rsc	1	-7/+7

2007-08-14	formatting; split kbd constants into kbd.h	rsc	1	-184/+64

2007-08-10	Make cp a magic symbol.	rsc	1	-1/+1

2007-08-08	check p->killed for long-lived sleeps	rsc	1	-1/+7

2007-08-08	missing void	rsc	1	-2/+2

2007-08-08	add EOF handling to console_read - works with cat	rsc	1	-13/+18

2006-09-07	debugging rearrangements	rsc	1	-10/+12

2006-09-07	debugging prints	rsc	1	-13/+23

2006-09-07	fix ide, pit interfaces	rsc	1	-1/+1

2006-09-07	remove _ prefixes	rsc	1	-3/+3

2006-09-07	run without lapic and ioapic, if they are not present	kaashoek	1	-0/+1
	if no lapic available, use 8253pit for clock now xv6 runs both on qemu (uniprocessor) and bochs (uniprocessor and MP)
2006-09-07	nit in console interrupts	kaashoek	1	-1/+0

2006-09-06	no /* */ comments	rsc	1	-29/+42

2006-09-06	standardize various * conventions	rsc	1	-24/+24

2006-09-06	spacing fixes: no tabs, 2-space indents (for rtm)	rsc	1	-87/+87

2006-09-06	print "0" for null string	rsc	1	-3/+7

2006-09-03	don't send keyboard interrupts to the second cpu, if we have only one cpu.	kaashoek	1	-2/+3
	xv6 seems to work fine on uniprocessor now.
2006-09-03	remove duplication	kaashoek	1	-0/+1
	don't use the same name for two different pieces of code
2006-08-29	clean up stale error checks and panics	rtm	1	-8/+0
	delete unused functions a few comments
2006-08-23	i/o redirection in sh	kaashoek	1	-4/+13
	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?
2006-08-15	commented out code for cwd	kaashoek	1	-1/+1

2006-08-11	init creates console, opens 0/1/2, runs sh	rtm	1	-3/+29
	sh accepts 0-argument commands (like userfs) reads from console
2006-08-10	interrupts could be recursive since lapic_eoi() called before rti	rtm	1	-10/+21
	so fast interrupts overflow the kernel stack fix: cli() before lapic_eoi()
2006-08-10	low-level keyboard input (not hooked up to /dev yet)	rtm	1	-1/+179
	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	printf	kaashoek	1	-0/+4
	convert userfs to use printf bfree ifree writei start on unlink
2006-08-09	fix test program: don't close before writing	kaashoek	1	-2/+0
	set fd to writeable on open for write
2006-08-09	devsw	kaashoek	1	-0/+22
	checkpoint: write(fd,"hello\n",6) where fd is a console dev almost works
2006-07-29	open()	rtm	1	-1/+1

2006-07-20	uint32_t -> uint &c	rtm	1	-1/+1

2006-07-17	no more cons_putc; real_cons_putc -> cons_putc	rsc	1	-17/+7

2006-07-17	add uint and standardize on typedefs instead of unsigned	rsc	1	-3/+3

2006-07-17	nitpicks	rsc	1	-5/+5

2006-07-16	add %s to cprintf for cons_puts	rsc	1	-1/+12

2006-07-16	standardize on #include "foo" not <foo>	rsc	1	-2/+2

2006-07-16	remove non-idiomatic increment/decrement	rsc	1	-4/+2

2006-07-16	Attempt to clean up newproc somewhat.	rsc	1	-1/+1
	Also remove all calls to memcpy in favor of memmove, which has defined semantics when the ranges overlap. The fact that memcpy was working in console.c to scroll the screen is not guaranteed by all implementations.
2006-07-16	New scheduler.	rsc	1	-1/+1
	Removed cli and sti stack in favor of tracking number of locks held on each CPU and explicit conditionals in spinlock.c.
2006-07-15	no more recursive locks	rtm	1	-10/+29
	wakeup1() assumes you hold proc_table_lock sleep(chan, lock) provides atomic sleep-and-release to wait for condition ugly code in swtch/scheduler to implement new sleep fix lots of bugs in pipes, wait, and exit fix bugs if timer interrupt goes off in schedule() console locks per line, not per byte
2006-07-12	i think my cmpxchg use was wrong in acquire	rtm	1	-2/+7
	nesting cli/sti: release shouldn't always enable interrupts separate setup of lapic from starting of other cpus, so cpu() works earlier flag to disable locking in console output make locks work even when curproc==0 (still crashes in clock interrupt)
2006-07-12	no more big kernel lock	rtm	1	-0/+7
	succeeds at usertests.c pipe test
2006-07-11	Changes to allow use of native x86 ELF compilers, which on my	rsc	1	-1/+1
	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.
2006-06-22	send console output to parallel port	rtm	1	-0/+19

2006-06-12	import	rtm	1	-0/+108