ref: 3c2cec93a9475a27f854ac2541f69c4a7a0b3657 dir: /lib/c/target/amd64-sysv-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