| /* |
| * 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 <linker/sections.h> |
| #include <kernel.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. |
| */ |
| _k_except_reason(_NANO_ERR_STACK_CHK_FAIL); |
| } |
| |
| /* 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); |