RTC auf true
Diff: rtos/TARGET_CORTEX/TARGET_CORTEX_M/mbed_rtx_fault_handler.c
- Revision:
- 0:38ceb79fef03
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/rtos/TARGET_CORTEX/TARGET_CORTEX_M/mbed_rtx_fault_handler.c Wed Nov 28 15:10:15 2018 +0000 @@ -0,0 +1,134 @@ +/* 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. + */ + +#include "rtx_os.h" +#include "device.h" +#include "platform/mbed_error.h" +#include "platform/mbed_interface.h" +#include "hal/serial_api.h" + +#ifndef MBED_FAULT_HANDLER_DISABLED +#include "mbed_rtx_fault_handler.h" + +//Functions Prototypes +void print_context_info(void); + +//Global for populating the context in exception handler +mbed_fault_context_t mbed_fault_context; + +//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, void *osRtxInfoIn) +{ + 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: %08X", i, ((uint32_t *)&mbed_fault_context)[i]); + } + + mbed_error_printf("\nSP : %08X" + "\nLR : %08X" + "\nPC : %08X" + "\nxPSR : %08X" + "\nPSP : %08X" + "\nMSP : %08X", 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: %08X", SCB->CPUID); + +#if !defined(TARGET_M0) && !defined(TARGET_M0P) + //Capture fault information registers to infer the cause of exception + mbed_error_printf("\nHFSR : %08X" + "\nMMFSR: %08X" + "\nBFSR : %08X" + "\nUFSR : %08X" + "\nDFSR : %08X" + "\nAFSR : %08X" ////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: %08X",SCB->MMFAR); + } + //Print BFAR only if its valid as indicated by BFSR + if (((0xFF00 & SCB->CFSR) >> 8) & 0x80) { + mbed_error_printf("\nBFAR : %08X",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"); + } +} + +#endif //MBED_FAULT_HANDLER_SUPPORT