ref: b843da74b79d585a30bd2b3f13e7c63d105baf94
dir: /src/libc/arch/amd64/openbsd/syscall.lst/
#Tab 15 #number name nargs 1 _exit 1 3 _read 3 4 _write 3 5 _open 3 6 _close 1 17 _brk 1 20 _getpid 0 46 _sigaction 3 67 _gettimeofday 2 122 _kill 2 198 _lseek 3