xv6/syscall.h

#define SYS_fork 1
#define SYS_exit 2
#define SYS_wait 3
#define SYS_cons_putc 4
#define SYS_pipe 5
#define SYS_write 6
#define SYS_read 7
#define SYS_close 8
#define SYS_block 9
#define SYS_kill 10
#define SYS_panic 11
primitive fork and exit system calls 2006-06-15 16:02:20 +00:00			`#define SYS_fork 1`
			`#define SYS_exit 2`
sleep, wakeup, wait, exit 2006-06-15 19:58:01 +00:00			`#define SYS_wait 3`
system call arguments 2006-06-26 15:11:19 +00:00			`#define SYS_cons_putc 4`
file descriptors pipes 2006-06-27 14:35:53 +00:00			`#define SYS_pipe 5`
			`#define SYS_write 6`
			`#define SYS_read 7`
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			`#define SYS_close 8`
disable all interrupts when acquiring lock user program that makes a blocking system call 2006-07-06 21:47:22 +00:00			`#define SYS_block 9`
pre-empt both user and kernel, in clock interrupt usertest.c tests pre-emption kill() 2006-07-11 17:39:45 +00:00			`#define SYS_kill 10`
no more recursive locks 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 2006-07-15 12:03:57 +00:00			`#define SYS_panic 11`