// System call numbers
#define SYS_fork         1
#define SYS_exit         2
#define SYS_wait         3
#define SYS_pipe         4
#define SYS_read         5
#define SYS_kill         6
#define SYS_exec         7
#define SYS_fstat        8
#define SYS_chdir        9
#define SYS_dup         10
#define SYS_getpid      11
#define SYS_sbrk        12
#define SYS_sleep       13
#define SYS_uptime      14
#define SYS_open        15
#define SYS_write       16
#define SYS_mknod       17
#define SYS_unlink      18
#define SYS_link        19
#define SYS_mkdir       20
#define SYS_close       21
#define SYS_getrtc      22
#define SYS_iostat      23
#define SYS_signal      24
#define SYS_sigqueue    25
#define SYS_sigreturn   26
#define SYS_setpgid     27
#define SYS_tcsetpgrp   28
#define SYS_setpriority 29