Kev Mann / mbed-dev-OS5_10_4

RTC auf true

rtos/TARGET_CORTEX/TARGET_CORTEX_M/mbed_rtx_fault_handler.c@0:38ceb79fef03, 2018-11-28 (annotated)

Committer:
kevman
Date:
Wed Nov 28 15:10:15 2018 +0000
Revision:
0:38ceb79fef03
RTC modified

Who changed what in which revision?

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kevman 0:38ceb79fef03 1 /* mbed Microcontroller Library
kevman 0:38ceb79fef03 2 * Copyright (c) 2006-2018 ARM Limited
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Licensed under the Apache License, Version 2.0 (the "License");
kevman 0:38ceb79fef03 5 * you may not use this file except in compliance with the License.
kevman 0:38ceb79fef03 6 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 7 *
kevman 0:38ceb79fef03 8 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 9 *
kevman 0:38ceb79fef03 10 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 11 * distributed under the License is distributed on an "AS IS" BASIS,
kevman 0:38ceb79fef03 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 13 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 14 * limitations under the License.
kevman 0:38ceb79fef03 15 */
kevman 0:38ceb79fef03 16
kevman 0:38ceb79fef03 17 #include "rtx_os.h"
kevman 0:38ceb79fef03 18 #include "device.h"
kevman 0:38ceb79fef03 19 #include "platform/mbed_error.h"
kevman 0:38ceb79fef03 20 #include "platform/mbed_interface.h"
kevman 0:38ceb79fef03 21 #include "hal/serial_api.h"
kevman 0:38ceb79fef03 22
kevman 0:38ceb79fef03 23 #ifndef MBED_FAULT_HANDLER_DISABLED
kevman 0:38ceb79fef03 24 #include "mbed_rtx_fault_handler.h"
kevman 0:38ceb79fef03 25
kevman 0:38ceb79fef03 26 //Functions Prototypes
kevman 0:38ceb79fef03 27 void print_context_info(void);
kevman 0:38ceb79fef03 28
kevman 0:38ceb79fef03 29 //Global for populating the context in exception handler
kevman 0:38ceb79fef03 30 mbed_fault_context_t mbed_fault_context;
kevman 0:38ceb79fef03 31
kevman 0:38ceb79fef03 32 //This is a handler function called from Fault handler to print the error information out.
kevman 0:38ceb79fef03 33 //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.
kevman 0:38ceb79fef03 34 void mbed_fault_handler (uint32_t fault_type, void *mbed_fault_context_in, void *osRtxInfoIn)
kevman 0:38ceb79fef03 35 {
kevman 0:38ceb79fef03 36 mbed_error_status_t faultStatus = MBED_SUCCESS;
kevman 0:38ceb79fef03 37
kevman 0:38ceb79fef03 38 mbed_error_printf("\n++ MbedOS Fault Handler ++\n\nFaultType: ");
kevman 0:38ceb79fef03 39
kevman 0:38ceb79fef03 40 switch( fault_type ) {
kevman 0:38ceb79fef03 41 case MEMMANAGE_FAULT_EXCEPTION:
kevman 0:38ceb79fef03 42 mbed_error_printf("MemManageFault");
kevman 0:38ceb79fef03 43 faultStatus = MBED_ERROR_MEMMANAGE_EXCEPTION;
kevman 0:38ceb79fef03 44 break;
kevman 0:38ceb79fef03 45
kevman 0:38ceb79fef03 46 case BUS_FAULT_EXCEPTION:
kevman 0:38ceb79fef03 47 mbed_error_printf("BusFault");
kevman 0:38ceb79fef03 48 faultStatus = MBED_ERROR_BUSFAULT_EXCEPTION;
kevman 0:38ceb79fef03 49 break;
kevman 0:38ceb79fef03 50
kevman 0:38ceb79fef03 51 case USAGE_FAULT_EXCEPTION:
kevman 0:38ceb79fef03 52 mbed_error_printf("UsageFault");
kevman 0:38ceb79fef03 53 faultStatus = MBED_ERROR_USAGEFAULT_EXCEPTION;
kevman 0:38ceb79fef03 54 break;
kevman 0:38ceb79fef03 55
kevman 0:38ceb79fef03 56 //There is no way we can hit this code without getting an exception, so we have the default treated like hardfault
kevman 0:38ceb79fef03 57 case HARD_FAULT_EXCEPTION:
kevman 0:38ceb79fef03 58 default:
kevman 0:38ceb79fef03 59 mbed_error_printf("HardFault");
kevman 0:38ceb79fef03 60 faultStatus = MBED_ERROR_HARDFAULT_EXCEPTION;
kevman 0:38ceb79fef03 61 break;
kevman 0:38ceb79fef03 62 }
kevman 0:38ceb79fef03 63 mbed_error_printf("\n\nContext:");
kevman 0:38ceb79fef03 64 print_context_info();
kevman 0:38ceb79fef03 65
kevman 0:38ceb79fef03 66 mbed_error_printf("\n\n-- MbedOS Fault Handler --\n\n");
kevman 0:38ceb79fef03 67
kevman 0:38ceb79fef03 68 //Now call mbed_error, to log the error and halt the system
kevman 0:38ceb79fef03 69 mbed_error( faultStatus, "Fault exception", mbed_fault_context.PC_reg, NULL, 0 );
kevman 0:38ceb79fef03 70
kevman 0:38ceb79fef03 71 }
kevman 0:38ceb79fef03 72
kevman 0:38ceb79fef03 73 MBED_NOINLINE void print_context_info(void)
kevman 0:38ceb79fef03 74 {
kevman 0:38ceb79fef03 75 //Context Regs
kevman 0:38ceb79fef03 76 for(int i=0;i<13;i++) {
kevman 0:38ceb79fef03 77 mbed_error_printf("\nR%-4d: %08X", i, ((uint32_t *)&mbed_fault_context)[i]);
kevman 0:38ceb79fef03 78 }
kevman 0:38ceb79fef03 79
kevman 0:38ceb79fef03 80 mbed_error_printf("\nSP : %08X"
kevman 0:38ceb79fef03 81 "\nLR : %08X"
kevman 0:38ceb79fef03 82 "\nPC : %08X"
kevman 0:38ceb79fef03 83 "\nxPSR : %08X"
kevman 0:38ceb79fef03 84 "\nPSP : %08X"
kevman 0:38ceb79fef03 85 "\nMSP : %08X", mbed_fault_context.SP_reg, mbed_fault_context.LR_reg, mbed_fault_context.PC_reg,
kevman 0:38ceb79fef03 86 mbed_fault_context.xPSR, mbed_fault_context.PSP, mbed_fault_context.MSP );
kevman 0:38ceb79fef03 87
kevman 0:38ceb79fef03 88 //Capture CPUID to get core/cpu info
kevman 0:38ceb79fef03 89 mbed_error_printf("\nCPUID: %08X", SCB->CPUID);
kevman 0:38ceb79fef03 90
kevman 0:38ceb79fef03 91 #if !defined(TARGET_M0) && !defined(TARGET_M0P)
kevman 0:38ceb79fef03 92 //Capture fault information registers to infer the cause of exception
kevman 0:38ceb79fef03 93 mbed_error_printf("\nHFSR : %08X"
kevman 0:38ceb79fef03 94 "\nMMFSR: %08X"
kevman 0:38ceb79fef03 95 "\nBFSR : %08X"
kevman 0:38ceb79fef03 96 "\nUFSR : %08X"
kevman 0:38ceb79fef03 97 "\nDFSR : %08X"
kevman 0:38ceb79fef03 98 "\nAFSR : %08X" ////Split/Capture CFSR into MMFSR, BFSR, UFSR
kevman 0:38ceb79fef03 99 ,SCB->HFSR, (0xFF & SCB->CFSR), ((0xFF00 & SCB->CFSR) >> 8), ((0xFFFF0000 & SCB->CFSR) >> 16), SCB->DFSR, SCB->AFSR );
kevman 0:38ceb79fef03 100
kevman 0:38ceb79fef03 101 //Print MMFAR only if its valid as indicated by MMFSR
kevman 0:38ceb79fef03 102 if ((0xFF & SCB->CFSR) & 0x80) {
kevman 0:38ceb79fef03 103 mbed_error_printf("\nMMFAR: %08X",SCB->MMFAR);
kevman 0:38ceb79fef03 104 }
kevman 0:38ceb79fef03 105 //Print BFAR only if its valid as indicated by BFSR
kevman 0:38ceb79fef03 106 if (((0xFF00 & SCB->CFSR) >> 8) & 0x80) {
kevman 0:38ceb79fef03 107 mbed_error_printf("\nBFAR : %08X",SCB->BFAR);
kevman 0:38ceb79fef03 108 }
kevman 0:38ceb79fef03 109 #endif
kevman 0:38ceb79fef03 110
kevman 0:38ceb79fef03 111 //Print Mode
kevman 0:38ceb79fef03 112 if (mbed_fault_context.EXC_RETURN & 0x8) {
kevman 0:38ceb79fef03 113 mbed_error_printf("\nMode : Thread");
kevman 0:38ceb79fef03 114 //Print Priv level in Thread mode - We capture CONTROL reg which reflects the privilege.
kevman 0:38ceb79fef03 115 //Note that the CONTROL register captured still reflects the privilege status of the
kevman 0:38ceb79fef03 116 //thread mode eventhough we are in Handler mode by the time we capture it.
kevman 0:38ceb79fef03 117 if(mbed_fault_context.CONTROL & 0x1) {
kevman 0:38ceb79fef03 118 mbed_error_printf("\nPriv : User");
kevman 0:38ceb79fef03 119 } else {
kevman 0:38ceb79fef03 120 mbed_error_printf("\nPriv : Privileged");
kevman 0:38ceb79fef03 121 }
kevman 0:38ceb79fef03 122 } else {
kevman 0:38ceb79fef03 123 mbed_error_printf("\nMode : Handler");
kevman 0:38ceb79fef03 124 mbed_error_printf("\nPriv : Privileged");
kevman 0:38ceb79fef03 125 }
kevman 0:38ceb79fef03 126 //Print Return Stack
kevman 0:38ceb79fef03 127 if (mbed_fault_context.EXC_RETURN & 0x4) {
kevman 0:38ceb79fef03 128 mbed_error_printf("\nStack: PSP");
kevman 0:38ceb79fef03 129 } else {
kevman 0:38ceb79fef03 130 mbed_error_printf("\nStack: MSP");
kevman 0:38ceb79fef03 131 }
kevman 0:38ceb79fef03 132 }
kevman 0:38ceb79fef03 133
kevman 0:38ceb79fef03 134 #endif //MBED_FAULT_HANDLER_SUPPORT