161 lines
4.1 KiB
C
161 lines
4.1 KiB
C
/* fatal.c - nanokernel fatal error handler */
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/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* DESCRIPTION
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* This module provides the _NanoFatalErrorHandler() routine.
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*/
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#include <toolchain.h>
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#include <sections.h>
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#include <nanokernel.h>
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#include <nano_private.h>
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#include <misc/printk.h>
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#include <asmPrv.h>
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/*
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* Define a default ESF for use with _NanoFatalErrorHandler() in the event
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* the caller does not have a NANO_ESF to pass
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*/
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const NANO_ESF _default_esf = {
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0xdeaddead, /* ESP */
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0xdeaddead, /* EBP */
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0xdeaddead, /* EBX */
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0xdeaddead, /* ESI */
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0xdeaddead, /* EDI */
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0xdeaddead, /* EDX */
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0xdeaddead, /* ECX */
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0xdeaddead, /* EAX */
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0xdeaddead, /* error code */
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0xdeaddead, /* EIP */
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0xdeaddead, /* CS */
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0xdeaddead, /* EFLAGS */
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};
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/**
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*
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* @brief Nanokernel fatal error handler
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*
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* This routine is called when a fatal error condition is detected by either
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* hardware or software.
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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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* @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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* @return This function does not return.
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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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#ifdef CONFIG_PRINTK
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/* Display diagnostic information about the error */
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switch (reason) {
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case _NANO_ERR_SPURIOUS_INT:
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printk("***** Unhandled exception/interrupt occurred! "
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"*****\n");
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break;
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case _NANO_ERR_INVALID_TASK_EXIT:
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printk("***** 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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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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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 = 0x%x\n"
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"Faulting instruction address = 0x%x\n"
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"eax: %x, ebx: %x, ecx: %x, edx: %x\n"
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"esi: %x, edi: %x, ebp: %x, esp: %x\n"
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"eflags: %x\n",
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sys_thread_self_get(),
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pEsf->eip,
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pEsf->eax, pEsf->ebx, pEsf->ecx, pEsf->edx,
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pEsf->esi, pEsf->edi, pEsf->ebp, pEsf->esp,
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pEsf->eflags);
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#endif /* CONFIG_PRINTK */
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/*
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* Error was fatal to a kernel task or a fiber; invoke the system
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* fatal error handling policy defined for the platform.
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*/
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_SysFatalErrorHandler(reason, pEsf);
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}
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#if CONFIG_EXCEPTION_DEBUG
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static FUNC_NORETURN void generic_exc_handle(unsigned int vector,
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const NANO_ESF *pEsf)
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{
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printk("***** CPU exception %d\n", vector);
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if ((1 << vector) & _EXC_ERROR_CODE_FAULTS) {
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printk("***** Exception code: 0x%x\n", pEsf->errorCode);
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}
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_NanoFatalErrorHandler(_NANO_ERR_SPURIOUS_INT, pEsf);
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}
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#define EXC_FUNC(vector) \
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FUNC_NORETURN void handle_exc_##vector(const NANO_ESF *pEsf) \
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{ \
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generic_exc_handle(vector, pEsf); \
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}
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EXC_FUNC(IV_DIVIDE_ERROR);
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EXC_FUNC(IV_NON_MASKABLE_INTERRUPT);
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EXC_FUNC(IV_OVERFLOW);
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EXC_FUNC(IV_BOUND_RANGE);
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EXC_FUNC(IV_INVALID_OPCODE);
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#ifndef CONFIG_FP_SHARING
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EXC_FUNC(IV_DEVICE_NOT_AVAILABLE);
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#endif
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EXC_FUNC(IV_DOUBLE_FAULT);
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EXC_FUNC(IV_INVALID_TSS);
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EXC_FUNC(IV_SEGMENT_NOT_PRESENT);
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EXC_FUNC(IV_STACK_FAULT);
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EXC_FUNC(IV_GENERAL_PROTECTION);
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EXC_FUNC(IV_PAGE_FAULT);
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EXC_FUNC(IV_X87_FPU_FP_ERROR);
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EXC_FUNC(IV_ALIGNMENT_CHECK);
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EXC_FUNC(IV_MACHINE_CHECK);
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#endif /* CONFIG_EXCEPTION_DEBUG */
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