74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*
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* Copyright (c) 2012-2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* @brief Compiler stack protection (kernel part)
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*
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* This module provides functions to support compiler stack protection
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* using canaries. This feature is enabled with configuration
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* CONFIG_STACK_CANARIES=y.
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*
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* When this feature is enabled, the compiler generated code refers to
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* function __stack_chk_fail and global variable __stack_chk_guard.
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*/
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#include <toolchain.h> /* compiler specific configurations */
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#if defined(CONFIG_STACK_CANARIES)
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#include <nano_private.h>
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#include <toolchain.h>
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#include <sections.h>
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/**
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*
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* @brief Stack canary error handler
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*
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* This function is invoked when a stack canary error is detected.
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*
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* @return Does not return
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*/
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void FUNC_NORETURN _StackCheckHandler(void)
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{
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/* Stack canary error is a software fatal condition; treat it as such.
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*/
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_NanoFatalErrorHandler(_NANO_ERR_STACK_CHK_FAIL, &_default_esf);
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}
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#endif /* CONFIG_STACK_CANARIES */
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#ifdef CONFIG_STACK_CANARIES
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/* Global variable */
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/*
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* Symbol referenced by GCC compiler generated code for canary value.
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* The canary value gets initialized in _Cstart().
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*/
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void __noinit *__stack_chk_guard;
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/**
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*
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* @brief Referenced by GCC compiler generated code
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*
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* This routine is invoked when a stack canary error is detected, indicating
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* a buffer overflow or stack corruption problem.
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*/
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FUNC_ALIAS(_StackCheckHandler, __stack_chk_fail, void);
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#endif
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