參考資訊:
https://board.flatassembler.net/index.php
https://tldp.org/HOWTO/Assembly-HOWTO/hello.html
https://chromium.googlesource.com/chromiumos/docs/+/HEAD/constants/syscalls.md
System Call
NR | syscall name | eax | arg0(ebx) | arg1(ecx) | arg2(edx) |
---|---|---|---|---|---|
1 | exit | 1 | int error_code | ||
4 | write | 4 | unsigned int fd | const char *buf | size_t count |
main.s
format elf executable 3 entry start segment readable writeable msg db "hello, world!", 10 len = $ - msg segment readable executable start: mov eax, 4 mov ebx, 1 mov ecx, msg mov edx, len int 0x80 mov eax, 1 xor ebx, ebx int 0x80
編譯、執行
$ qemu-i386 /usr/local/bin/fasm main.s $ qemu-i386 ./main hello, world!