手动设置SEH

转载至   http://bbs.pediy.com/showthread.php?t=46690

一般情况下我们在 VS2005以上都不能手动设置SEH异常处理函数

因为有 SafeSEH  保护

如下：

#include "stdafx.h"
#include <Windows.h>

int    __stdcall CatchProc(EXCEPTION_RECORD* pExcept,void* pErr,void* pContext,void* p_Dis)
{
	if (pExcept->ExceptionCode == EXCEPTION_BREAKPOINT)
	{
		printf("catched");
		return 0;
	}
	printf("catched");
	return 1;
}


bool __stdcall SetCatchProc(void*    pCProc)
{
	char* p_ExpProcEntry;
	__asm
	{
		mov eax,fs:[0]
		add eax,4
		mov eax,dword ptr [eax]
		mov p_ExpProcEntry,eax
	}
	DWORD p_oldProtect = 0;
	if (VirtualProtect(p_ExpProcEntry,5,PAGE_EXECUTE_READWRITE,&p_oldProtect))
	{
		*(BYTE*)p_ExpProcEntry = 0xE9;
		*(DWORD*)(p_ExpProcEntry+1)=(char*)pCProc-p_ExpProcEntry-5;
		return true;
	}
	return false;
}
int _tmain(int argc, _TCHAR* argv[])
{
	SetCatchProc(CatchProc);
	int i=0;
	int sum = 5/i;
	char p1[255];
	gets(p1);
	return 0;
}