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_write 5 7 #define SYS_read 6 8 #define SYS_close 7 9 #define SYS_kill 8 10 #define SYS_exec 9 11 #define SYS_open 10 12 #define SYS_mknod 11 13 #define SYS_unlink 12 14 #define SYS_fstat 13 15 #define SYS_link 14 16 #define SYS_mkdir 15 17 #define SYS_chdir 16 18 #define SYS_dup 17 19 #define SYS_getpid 18 20 #define SYS_sbrk 19 21