seccook.c

不错的东西 请查看 WINCE OS

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// This source code is licensed under Microsoft Shared Source License
// Version 1.0 for Windows CE.
// For a copy of the license visit http://go.microsoft.com/fwlink/?LinkId=3223.
//
/***
*seccook.c - defines buffer overrun security cookie
*
*Purpose:
*       Defines per-module global variable __security_cookie, which is used
*       by the /GS compile switch to detect local buffer variable overrun
*       bugs/attacks.
*
*       When compiling /GS, the compiler injects code to detect when a local
*       array variable has been overwritten, potentially overwriting the
*       return address (on machines like x86 where the return address is on
*       the stack).  A local variable is allocated directly before the return
*       address and initialized on entering the function.  When exiting the
*       function, the compiler inserts code to verify that the local variable
*       has not been modified.  If it has, then an error reporting routine
*       is called.
*
*******************************************************************************/

#include <corecrt.h>
#include <windows.h>

/*
 * The global security cookie.  This name is known to the compiler.
 * Initialize to a garbage non-zero value just in case we have a buffer overrun
 * in any code that gets run before __security_init_cookie() has a chance to
 * initialize the cookie to the final value.
 */

DWORD_PTR __security_cookie = DEFAULT_SECURITY_COOKIE;