ref: 5c0bbb5ff6603cf20c4e3f4ec16dd7b60799cb85
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