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/* * Copyright (c) 2014 Wind River Systems, Inc. * * SPDX-License-Identifier: Apache-2.0 */ /** * @file * @brief Kernel fatal error handler for ARM Cortex-M * * This module provides the _NanoFatalErrorHandler() routine for ARM Cortex-M. */ #include <toolchain.h> #include <linker/sections.h> #include <inttypes.h> #include <kernel.h> #include <kernel_structs.h> #include <misc/printk.h> /** * * @brief Kernel fatal error handler * * This routine is called when fatal error conditions are detected by software * and is responsible only for reporting the error. Once reported, it then * invokes the user provided routine _SysFatalErrorHandler() which is * responsible for implementing the error handling policy. * * The caller is expected to always provide a usable ESF. In the event that the * fatal error does not have a hardware generated ESF, the caller should either * create its own or use a pointer to the global default ESF <_default_esf>. * * Unlike other arches, this function may return if _SysFatalErrorHandler * determines that only the current thread should be aborted and the CPU * was in handler mode. PendSV will be asserted in this case and the current * thread taken off the run queue. Leaving the exception will immediately * trigger a context switch. * * @param reason the reason that the handler was called * @param pEsf pointer to the exception stack frame */ void _NanoFatalErrorHandler(unsigned int reason, const NANO_ESF *pEsf) { switch (reason) { #if defined(CONFIG_STACK_CANARIES) || defined(CONFIG_STACK_SENTINEL) case _NANO_ERR_STACK_CHK_FAIL: printk("***** Stack Check Fail! *****\n"); break; #endif /* CONFIG_STACK_CANARIES */ case _NANO_ERR_ALLOCATION_FAIL: printk("**** Kernel Allocation Failure! ****\n"); break; case _NANO_ERR_KERNEL_OOPS: printk("***** Kernel OOPS! *****\n"); break; case _NANO_ERR_KERNEL_PANIC: printk("***** Kernel Panic! *****\n"); break; default: printk("**** Unknown Fatal Error %d! ****\n", reason); break; } printk("Current thread ID = %p\n" "Faulting instruction address = 0x%x\n", k_current_get(), pEsf->pc); /* * Now that the error has been reported, call the user implemented * policy * to respond to the error. The decisions as to what responses are * appropriate to the various errors are something the customer must * decide. */ _SysFatalErrorHandler(reason, pEsf); } void _do_kernel_oops(const NANO_ESF *esf) { _NanoFatalErrorHandler(esf->r0, esf); } |