參考資訊:
https://chromium.googlesource.com/chromiumos/docs/+/HEAD/constants/syscalls.md
main.s
.global _start .data msg: .ascii "hello, world!\n" len = . - msg .text _start: mov $1, %rax mov $1, %rbx mov $msg, %rcx mov $len, %rdx int $0x80 mov $60, %rax mov $0, %rbx int $0x80
NR | syscall name | rax | arg0(rbx) | arg1(rcx) | arg2(rdx) |
---|---|---|---|---|---|
1 | write | 1 | unsigned int fd | const char *buf | size_t count |
60 | exit | 60 | int error_code |
編譯、執行
$ x86_64-linux-gnu-gcc main.s -o main -static -nostdlib $ qemu-x86_64 ./main hello, world!