C++中调用汇编函数

• obj
• src
  • asm
    • asm_base.S
  • cpp
    • main_cpp.cpp
  • inc
    • asm.h
• makefile
• a.out

# src/asm/asm_base.S

.text
.globl asm_add
.globl asm_sub

asm_add:                    

   push   %ebp
   mov    %esp,%ebp
   mov    0x8(%ebp),%edx
   mov    0xc(%ebp),%eax
   add    %edx,%eax
   pop    %ebp
   ret    

asm_sub:
    push   %ebp
    mov    %esp,%ebp
    mov    0x8(%ebp),%eax
    sub    0xc(%ebp),%eax
    pop    %ebp
    ret

// src/inc/asm.h

#ifndef __INC_ASM_H__
#define __INC_ASM_H__

#ifdef __cplusplus
extern "C" {
#endif

    extern int asm_add(int a, int b);
    extern int asm_sub(int a, int b);

#ifdef __cplusplus
}
#endif

#endif

// src/cpp/main_cpp.cpp

#include "asm.h"
#include "main_cpp.h"

int main_cpp(void){
    int a = 10;
    int b = 20;
    int c = asm_add(a, b);
    int d = asm_sub(a, b);

    return 0;
}

// src/inc/main_cpp.h
#ifndef __MAIN_CPP_H__
#define __MAIN_CPP_H__

#ifdef __cplusplus
extern "C" {
#endif

    int main_cpp(void);

#ifdef __cplusplus
}
#endif

#endif