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C内嵌汇编调用C写的函数的例子

2013-02-16 10:01:17| 分类：程序 | 标签： |举报 |字号大中小订阅

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int my_add(int a)

{

return (++a);

}

void main(void)

{

int a=8;

int b=0;

printf("a=%d /r/n",a);

__asm

{

push a; // 压入参数

call my_add; // 调用函数

mov b,eax; // 将函数返回值送入变量b //注：函数的返回值默认在eax寄存器

add esp,4; // 手动平衡堆栈，否则程序会出错 //注：加4是因为int型是4个字节

}

printf("b=%d /r/n",b);

}

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              blogAbstract:'<div\>int my_add(int a)  </div\><div\>{  </div\><div\>    return (++a);  </div\><div\>}  </div\><div\>  </div\><div\>void main(void)  </div\><div\>{  </div\><div\>    int a=8;  </div\><div\>    int b=0;  </div\><div\>      </div\><div\>    printf(\"a=%d /r/n\",a);  </div\><div\>      </div\><div\>    __asm  </div\><div\>    {         </div\><div\>        push a;           // 压入参数  </div\><div\>        </div\><div\>        call my_add;   // 调用函数   </div\><div\>         </div\><div\>        mov b,eax;</div\>',
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