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/*
* Copyright (c) 2012-2014 Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief Compiler stack protection (kernel part)
*
* This module provides functions to support compiler stack protection
* using canaries. This feature is enabled with configuration
* CONFIG_STACK_CANARIES=y.
*
* When this feature is enabled, the compiler generated code refers to
* function __stack_chk_fail and global variable __stack_chk_guard.
*/
#include <toolchain.h> /* compiler specific configurations */
#include <kernel_structs.h>
#include <toolchain.h>
#include <sections.h>
/**
*
* @brief Stack canary error handler
*
* This function is invoked when a stack canary error is detected.
*
* @return Does not return
*/
void FUNC_NORETURN _StackCheckHandler(void)
{
/* Stack canary error is a software fatal condition; treat it as such.
*/
_NanoFatalErrorHandler(_NANO_ERR_STACK_CHK_FAIL, &_default_esf);
}
/* Global variable */
/*
* Symbol referenced by GCC compiler generated code for canary value.
* The canary value gets initialized in _Cstart().
*/
void __noinit *__stack_chk_guard;
/**
*
* @brief Referenced by GCC compiler generated code
*
* This routine is invoked when a stack canary error is detected, indicating
* a buffer overflow or stack corruption problem.
*/
FUNC_ALIAS(_StackCheckHandler, __stack_chk_fail, void);
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