ref: af25b58d05b0700990057ce3f8c853bd43f2ece0 dir: /lib/c/arch/amd64/openbsd/syscall.lst/
#number name 1 _Exit 3 _read 4 _write 5 _open 6 _close 17 _brk 20 _getpid 46 _sigaction 122 _kill 198 _lseek