1// System call numbers
2#define SYS_fork 1
3#define SYS_exit 2
4#define SYS_wait 3
5#define SYS_pipe 4
6#define SYS_read 5
7#define SYS_kill 6
8#define SYS_exec 7
9#define SYS_fstat 8
10#define SYS_chdir 9
11#define SYS_dup 10
12#define SYS_getpid 11
13#define SYS_sbrk 12
14#define SYS_sleep 13
15#define SYS_uptime 14
16#define SYS_open 15
17#define SYS_write 16
18#define SYS_mknod 17
19#define SYS_unlink 18
20#define SYS_link 19
21#define SYS_mkdir 20
22#define SYS_close 21
23