mirror of
https://github.com/zephyrproject-rtos/zephyr
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71ce8ceb18
* z_NanoFatalErrorHandler() is now moved to common kernel code and renamed z_fatal_error(). Arches dump arch-specific info before calling. * z_SysFatalErrorHandler() is now moved to common kernel code and renamed k_sys_fatal_error_handler(). It is now much simpler; the default policy is simply to lock interrupts and halt the system. If an implementation of this function returns, then the currently running thread is aborted. * New arch-specific APIs introduced: - z_arch_system_halt() simply powers off or halts the system. * We now have a standard set of fatal exception reason codes, namespaced under K_ERR_* * CONFIG_SIMPLE_FATAL_ERROR_HANDLER deleted * LOG_PANIC() calls moved to k_sys_fatal_error_handler() Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*
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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 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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z_except_reason(K_ERR_STACK_CHK_FAIL);
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CODE_UNREACHABLE;
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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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