First contact with C language bare function

First on the code:

Naked.cpp:

#include "stdafx.h"

extern "C" int __declspec (naked) add2 (int x,int y)//reference description supports cross-file invocation
{
__asm{//function environment initialization (stack, protect field, fill buffer)
PUSH EBP
MOV Ebp,esp
SUB esp,0x40
PUSH EBX
PUSH ESI
PUSH EDI
LEA Edi,dword PTR ss:[ebp-0x40]
MOV EAX,0XCCCCCCCC
MOV ecx,0x10
REP Stosd
}
__asm{//Function function
MOV Eax,dword PTR ss:[ebp+0x8]
ADD Eax,dword PTR ss:[ebp+0xc]
}
__asm{//Restore existing descending stack return
POP EDI
POP ESI
POP EBX
MOV ESP,EBP
POP EBP
Ret
}
}

====================================================

Base.cpp

#include "stdafx.h"

extern "C" int add2 (int,int); declaring external functions

int _tmain (int argc, _tchar* argv[])
{

Test
int sum=0;

printf ("Add2 (50,76):%d\n", Add2 (50,76));

return 0;

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Today deepens understanding of a C language function of the operating mechanism.

First contact with C language bare function