| /* |
| * Copyright (c) 2014 Wind River Systems, Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /** |
| * @file |
| * @brief Fatal fault handling |
| * |
| * This module implements the routines necessary for handling fatal faults on |
| * ARCv2 CPUs. |
| */ |
| |
| #include <nano_private.h> |
| #include <offsets.h> |
| #include <toolchain.h> |
| #include <arch/cpu.h> |
| |
| #ifdef CONFIG_PRINTK |
| #include <misc/printk.h> |
| #define PR_EXC(...) printk(__VA_ARGS__) |
| #else |
| #define PR_EXC(...) |
| #endif /* CONFIG_PRINTK */ |
| |
| const NANO_ESF _default_esf = { |
| 0xdeaddead, /* placeholder */ |
| }; |
| |
| /** |
| * |
| * @brief Nanokernel 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>. |
| * |
| * @return This function does not return. |
| */ |
| FUNC_NORETURN void _NanoFatalErrorHandler(unsigned int reason, |
| const NANO_ESF *pEsf) |
| { |
| switch (reason) { |
| case _NANO_ERR_INVALID_TASK_EXIT: |
| PR_EXC("***** Invalid Exit Software Error! *****\n"); |
| break; |
| |
| #if defined(CONFIG_STACK_CANARIES) |
| case _NANO_ERR_STACK_CHK_FAIL: |
| PR_EXC("***** Stack Check Fail! *****\n"); |
| break; |
| #endif |
| |
| case _NANO_ERR_ALLOCATION_FAIL: |
| PR_EXC("**** Kernel Allocation Failure! ****\n"); |
| break; |
| |
| default: |
| PR_EXC("**** Unknown Fatal Error %d! ****\n", reason); |
| break; |
| } |
| PR_EXC("Current thread ID = 0x%x\n" |
| "Faulting instruction address = 0x%x\n", |
| sys_thread_self_get(), |
| _arc_v2_aux_reg_read(_ARC_V2_ERET)); |
| |
| /* |
| * 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); |
| |
| for (;;) |
| ; |
| } |