101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/*
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* Copyright (c) 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 Kernel fatal error handler for ARM Cortex-M
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*
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* This module provides the _NanoFatalErrorHandler() routine for ARM Cortex-M.
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*/
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#include <toolchain.h>
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#include <linker/sections.h>
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#include <inttypes.h>
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#include <kernel.h>
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#include <kernel_structs.h>
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#include <misc/printk.h>
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/**
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*
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* @brief Kernel fatal error handler
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*
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* This routine is called when fatal error conditions are detected by software
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* and is responsible only for reporting the error. Once reported, it then
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* invokes the user provided routine _SysFatalErrorHandler() which is
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* responsible for implementing the error handling policy.
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*
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* The caller is expected to always provide a usable ESF. In the event that the
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* fatal error does not have a hardware generated ESF, the caller should either
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* create its own or use a pointer to the global default ESF <_default_esf>.
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*
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* Unlike other arches, this function may return if _SysFatalErrorHandler
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* determines that only the current thread should be aborted and the CPU
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* was in handler mode. PendSV will be asserted in this case and the current
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* thread taken off the run queue. Leaving the exception will immediately
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* trigger a context switch.
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*
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* @param reason the reason that the handler was called
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* @param pEsf pointer to the exception stack frame
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*/
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void _NanoFatalErrorHandler(unsigned int reason,
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const NANO_ESF *pEsf)
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{
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switch (reason) {
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#if defined(CONFIG_STACK_CANARIES) || defined(CONFIG_STACK_SENTINEL)
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case _NANO_ERR_STACK_CHK_FAIL:
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printk("***** Stack Check Fail! *****\n");
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break;
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#endif /* CONFIG_STACK_CANARIES */
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case _NANO_ERR_ALLOCATION_FAIL:
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printk("**** Kernel Allocation Failure! ****\n");
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break;
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case _NANO_ERR_KERNEL_OOPS:
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printk("***** Kernel OOPS! *****\n");
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break;
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case _NANO_ERR_KERNEL_PANIC:
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printk("***** Kernel Panic! *****\n");
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break;
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default:
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printk("**** Unknown Fatal Error %d! ****\n", reason);
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break;
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}
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printk("Current thread ID = %p\n"
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"Faulting instruction address = 0x%x\n",
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k_current_get(), pEsf->pc);
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/*
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* Now that the error has been reported, call the user implemented
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* policy
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* to respond to the error. The decisions as to what responses are
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* appropriate to the various errors are something the customer must
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* decide.
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*/
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_SysFatalErrorHandler(reason, pEsf);
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}
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void _do_kernel_oops(const NANO_ESF *esf)
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{
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_NanoFatalErrorHandler(esf->r0, esf);
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}
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FUNC_NORETURN void _arch_syscall_oops(void *ssf_ptr)
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{
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u32_t *ssf_contents = ssf_ptr;
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NANO_ESF oops_esf = { 0 };
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oops_esf.pc = ssf_contents[3];
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_do_kernel_oops(&oops_esf);
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CODE_UNREACHABLE;
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}
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