x64 linux 下C语言、AT&T格式…

1、main.c

#include <stdio.h>

int test(int x);

int main ()

{

printf ("调用汇编语言编写的函数test()结果为:%d\n",test(5));

}

2、test.C

.data

.align 16

.text

.global test

# integer parameters: rdi, rsi, rdx, rcx, r8, r9

# buff -> rdi

# buffSize -> rsi

test:

pushq %rbp # push base pointer of caller to stack

movq %rsp, %rbp # put stack pointer of caller to base pointer

movq %rdi, %rax # return value should be put in rax register

leaveq # mov %rbp, %rsp

# pop %rbp

retq # return

3、编译

$ gcc -o test main.c test.S

4、运行

$ ./test

调用汇编语言编写的函数test()结果为:5