vs2022 x64 C/C++和汇编混编(案例代码)

#include <windows.h>

extern "C" void  __stdcall asm_func(const char* lpText);

extern "C" UINT GetMsgBoxType()
{
	return MB_YESNOCANCEL;
}

int main()
{
	asm_func("Hello world!");
	return 0;
}

.data

	msGCaption  db 'Message box text',0

.code 
align 16

extern GetMsgBoxType : proc
extern MessageBoxA : proc
extern __imp_MessageBoxA : qWord


asm_func proc
	; RCX = address for the string for the message box
	sub		rsp, 28h		; shadow stack only [n]8 size
	
	lea		rdx, [msgCaption]
	mov		r8, rcx

	call	GetMsgBoxType
	mov		r9, rax
	xor     rcx, rcx
	
	;call	[__imp_MessageBoxA]
	call MessageBoxA

	add		rsp, 28h		; restoring shadow stack
	ret
asm_func endp

end