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62 lines
1.5 KiB
62 lines
1.5 KiB
/* |
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* Copyright (c) 2012-2014 Wind River Systems, Inc. |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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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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#include <kernel_structs.h> |
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#include <toolchain.h> |
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#include <linker/sections.h> |
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#include <kernel.h> |
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#include <app_memory/app_memdomain.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 _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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z_except_reason(K_ERR_STACK_CHK_FAIL); |
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CODE_UNREACHABLE; /* LCOV_EXCL_LINE */ |
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} |
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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 z_cstart(). |
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*/ |
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#ifdef CONFIG_USERSPACE |
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K_APP_DMEM(z_libc_partition) uintptr_t __stack_chk_guard; |
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#else |
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__noinit uintptr_t __stack_chk_guard; |
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#endif |
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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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