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2024-03-21-c++调用汇编

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CMakeLists.txt

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cmake_minimum_required(VERSION 3.24)
project(cplusplus_demo)

set(CMAKE_CXX_STANDARD 11)

ENABLE_LANGUAGE(ASM)

add_executable(main main.cpp test.S)

main.cpp

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#include <iostream>

using namespace std;

extern "C" int addJohnSong(int a,int b);

int main(int argc, char *argv[]) {

    cout << addJohnSong(2, 3) << endl;
}

test.S

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	.globl	_addJohnSong
	.p2align	4, 0x90
_addJohnSong:                           ## @addJohnSong
	.cfi_startproc
	pushq	%rbp
	movq	%rsp, %rbp
	movl	%edi, -4(%rbp)
	movl	%esi, -8(%rbp)
	movl	-4(%rbp), %eax
	addl	-8(%rbp), %eax
	addl	-8(%rbp), %eax
	popq	%rbp
	retq
	.cfi_endproc