115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/* fatal.c - fatal fault handling */
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/*
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* Copyright (c) 2014 Wind River Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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DESCRIPTION
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This module implements the routines necessary for handling fatal faults on
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ARCv2 CPUs.
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*/
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#include <nanok.h>
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#include <offsets.h>
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#include <toolchain.h>
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#include <nanokernel/cpu.h>
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#ifdef CONFIG_PRINTK
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#include <misc/printk.h>
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#define PR_EXC(...) printk(__VA_ARGS__)
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#else
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#define PR_EXC(...)
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#endif /* CONFIG_PRINTK */
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const NANO_ESF __defaultEsf = {
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0xdeaddead, /* placeholder */
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};
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/*******************************************************************************
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*
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* _NanoFatalErrorHandler - nanokernel 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 <__defaultEsf>.
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*
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* RETURNS: This function does not return.
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*
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* \NOMANUAL
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*/
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FUNC_NORETURN 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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case _NANO_ERR_INVALID_TASK_EXIT:
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PR_EXC("***** Invalid Exit Software Error! *****\n");
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break;
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#if defined(CONFIG_STACK_CANARIES)
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case _NANO_ERR_STACK_CHK_FAIL:
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PR_EXC("***** Stack Check Fail! *****\n");
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break;
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#endif
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#ifdef CONFIG_ENHANCED_SECURITY
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case _NANO_ERR_INVALID_STRING_OP:
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PR_EXC("**** Invalid string operation! ****\n");
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break;
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#endif
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default:
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PR_EXC("**** Unknown Fatal Error %d! ****\n", reason);
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break;
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}
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PR_EXC("Current context ID = 0x%x\n"
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"Faulting instruction address = 0x%x\n",
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context_self_get(),
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_arc_v2_aux_reg_read(_ARC_V2_ERET));
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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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for (;;)
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;
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}
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