mbed library sources. Supersedes mbed-src.
Dependents: Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more
Diff: cmsis/TARGET_CORTEX_M/mbed_fault_handler.c
- Revision:
- 189:f392fc9709a3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/cmsis/TARGET_CORTEX_M/mbed_fault_handler.c Wed Feb 20 22:31:08 2019 +0000 @@ -0,0 +1,156 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2018 ARM Limited + * + * 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. + */ + +#ifndef __STDC_FORMAT_MACROS +#define __STDC_FORMAT_MACROS +#endif +#include <inttypes.h> +#include <string.h> + +#include "device.h" +#include "mbed_error.h" +#include "mbed_interface.h" +#include "mbed_crash_data_offsets.h" + +#ifndef MBED_FAULT_HANDLER_DISABLED +#include "mbed_fault_handler.h" + +//Functions Prototypes +void print_context_info(void); + +#if MBED_CONF_PLATFORM_CRASH_CAPTURE_ENABLED + //Global for populating the context in exception handler + mbed_fault_context_t *const mbed_fault_context=(mbed_fault_context_t *)(FAULT_CONTEXT_LOCATION); +#else + mbed_fault_context_t fault_context; + mbed_fault_context_t *const mbed_fault_context=(mbed_fault_context_t *)&fault_context; +#endif + +//This is a handler function called from Fault handler to print the error information out. +//This runs in fault context and uses special functions(defined in mbed_rtx_fault_handler.c) to print the information without using C-lib support. +void mbed_fault_handler (uint32_t fault_type, void *mbed_fault_context_in) +{ + mbed_error_status_t faultStatus = MBED_SUCCESS; + + mbed_error_printf("\n++ MbedOS Fault Handler ++\n\nFaultType: "); + + switch( fault_type ) { + case MEMMANAGE_FAULT_EXCEPTION: + mbed_error_printf("MemManageFault"); + faultStatus = MBED_ERROR_MEMMANAGE_EXCEPTION; + break; + + case BUS_FAULT_EXCEPTION: + mbed_error_printf("BusFault"); + faultStatus = MBED_ERROR_BUSFAULT_EXCEPTION; + break; + + case USAGE_FAULT_EXCEPTION: + mbed_error_printf("UsageFault"); + faultStatus = MBED_ERROR_USAGEFAULT_EXCEPTION; + break; + + //There is no way we can hit this code without getting an exception, so we have the default treated like hardfault + case HARD_FAULT_EXCEPTION: + default: + mbed_error_printf("HardFault"); + faultStatus = MBED_ERROR_HARDFAULT_EXCEPTION; + break; + } + mbed_error_printf("\n\nContext:"); + print_context_info(); + + mbed_error_printf("\n\n-- MbedOS Fault Handler --\n\n"); + + //Now call mbed_error, to log the error and halt the system + mbed_error( faultStatus, "Fault exception", mbed_fault_context->PC_reg, NULL, 0 ); + +} + +MBED_NOINLINE void print_context_info(void) +{ + //Context Regs + for(int i=0;i<13;i++) { + mbed_error_printf("\nR%-4d: %08" PRIX32, i, ((uint32_t *)(mbed_fault_context))[i]); + } + + mbed_error_printf("\nSP : %08" PRIX32 + "\nLR : %08" PRIX32 + "\nPC : %08" PRIX32 + "\nxPSR : %08" PRIX32 + "\nPSP : %08" PRIX32 + "\nMSP : %08" PRIX32, mbed_fault_context->SP_reg, mbed_fault_context->LR_reg, mbed_fault_context->PC_reg, + mbed_fault_context->xPSR, mbed_fault_context->PSP, mbed_fault_context->MSP ); + + //Capture CPUID to get core/cpu info + mbed_error_printf("\nCPUID: %08" PRIX32, SCB->CPUID); + +#if !defined(TARGET_M0) && !defined(TARGET_M0P) + //Capture fault information registers to infer the cause of exception + mbed_error_printf("\nHFSR : %08" PRIX32 + "\nMMFSR: %08" PRIX32 + "\nBFSR : %08" PRIX32 + "\nUFSR : %08" PRIX32 + "\nDFSR : %08" PRIX32 + "\nAFSR : %08" PRIX32 ////Split/Capture CFSR into MMFSR, BFSR, UFSR + ,SCB->HFSR, (0xFF & SCB->CFSR), ((0xFF00 & SCB->CFSR) >> 8), ((0xFFFF0000 & SCB->CFSR) >> 16), SCB->DFSR, SCB->AFSR ); + + //Print MMFAR only if its valid as indicated by MMFSR + if ((0xFF & SCB->CFSR) & 0x80) { + mbed_error_printf("\nMMFAR: %08" PRIX32, SCB->MMFAR); + } + //Print BFAR only if its valid as indicated by BFSR + if (((0xFF00 & SCB->CFSR) >> 8) & 0x80) { + mbed_error_printf("\nBFAR : %08" PRIX32, SCB->BFAR); + } +#endif + + //Print Mode + if (mbed_fault_context->EXC_RETURN & 0x8) { + mbed_error_printf("\nMode : Thread"); + //Print Priv level in Thread mode - We capture CONTROL reg which reflects the privilege. + //Note that the CONTROL register captured still reflects the privilege status of the + //thread mode eventhough we are in Handler mode by the time we capture it. + if(mbed_fault_context->CONTROL & 0x1) { + mbed_error_printf("\nPriv : User"); + } else { + mbed_error_printf("\nPriv : Privileged"); + } + } else { + mbed_error_printf("\nMode : Handler"); + mbed_error_printf("\nPriv : Privileged"); + } + //Print Return Stack + if (mbed_fault_context->EXC_RETURN & 0x4) { + mbed_error_printf("\nStack: PSP"); + } else { + mbed_error_printf("\nStack: MSP"); + } +} + +mbed_error_status_t mbed_get_reboot_fault_context (mbed_fault_context_t *fault_context) +{ + mbed_error_status_t status = MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_ITEM_NOT_FOUND); +#if MBED_CONF_PLATFORM_CRASH_CAPTURE_ENABLED + if(fault_context == NULL) + return MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_INVALID_ARGUMENT); + memcpy(fault_context, mbed_fault_context, sizeof(mbed_fault_context_t)); + status = MBED_SUCCESS; +#endif + return status; +} + +#endif //MBED_FAULT_HANDLER_SUPPORT