ref: 355f73cb919d009d7527b5083ae8341f0ceea97d
dir: /src/libc/arch/amd64/openbsd/syscall.lst/
#Tab 15 #number name nargs 1 _exit 1 2 _fork 0 3 _read 3 4 _write 3 5 _open 3 6 _close 1 10 _unlink 1 11 _wait4 4 17 _brk 1 19 _getrusage 2 20 _getpid 0 33 _access 2 46 _sigaction 3 59 _execve 3 67 _gettimeofday 2 122 _kill 2 128 _rename 2 198 _lseek 3