ref: c809e59d972aead305d59b23e4d1d156c1ebd2a6 dir: /src/libc/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