具体过程:

一 用visual studio2022新建一个x86汇编项目

二 c语言调用x86汇编函数的代码部分

c_call_x86.asm

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
;c_call_x86.asm
.model flat,c
 .code
 
; extern "C" int CalcSum_(int a, int b, int c)
;
; Description: This function demonstrates passing arguments between
; a C++ function and an assembly language function.
;
; Returns: a + b + c
 
CalcSum_ proc
 
; Initialize a stack frame pointer
 push ebp
 mov ebp,esp
 
; Load the argument values
 mov eax,[ebp+8] ; eax = 'a'
 mov ecx,[ebp+12] ; ecx = 'b'
 mov edx,[ebp+16]  ; edx = 'c'
 
; Calculate the sum
 add eax,ecx ; eax = 'a' + 'b'
 add eax,edx ; eax = 'a' + 'b' + 'c'
 
; Restore the caller's stack frame pointer
 pop ebp
 ret
 
CalcSum_ endp
 end

main.cpp

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
#include <stdio.h>
#include <tchar.h>
extern "C" int CalcSum_(int a, int b, int c);

int _tmain(int argc, _TCHAR* argv[])
{
	int a = 17, b = 11, c = 14;
	int sum = CalcSum_(a, b, c);

	printf(" a: %d\n", a);
	printf(" b: %d\n", b);
	printf(" c: %d\n", c);
	printf(" sum: %d\n", sum);
	return 0;
}