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cm_backtrace.c
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/*
* This file is part of the CmBacktrace Library.
*
* Copyright (c) 2016-2019, Armink, <[email protected]>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* 'Software'), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Function: Initialize function and other general function.
* Created on: 2016-12-15
*/
#include "cm_backtrace.h"
#include <stdbool.h>
#include <string.h>
#include <stdio.h>
#if __STDC_VERSION__ < 199901L
#error "must be C99 or higher. try to add '-std=c99' to compile parameters"
#endif
#if defined(__ARMCC_VERSION)
#define SECTION_START(_name_) _name_##$$Base
#define SECTION_END(_name_) _name_##$$Limit
#define IMAGE_SECTION_START(_name_) Image$$##_name_##$$Base
#define IMAGE_SECTION_END(_name_) Image$$##_name_##$$Limit
#define CSTACK_BLOCK_START(_name_) SECTION_START(_name_)
#define CSTACK_BLOCK_END(_name_) SECTION_END(_name_)
#define CODE_SECTION_START(_name_) IMAGE_SECTION_START(_name_)
#define CODE_SECTION_END(_name_) IMAGE_SECTION_END(_name_)
extern const int CSTACK_BLOCK_START(CMB_CSTACK_BLOCK_NAME);
extern const int CSTACK_BLOCK_END(CMB_CSTACK_BLOCK_NAME);
extern const int CODE_SECTION_START(CMB_CODE_SECTION_NAME);
extern const int CODE_SECTION_END(CMB_CODE_SECTION_NAME);
#elif defined(__ICCARM__)
#pragma section=CMB_CSTACK_BLOCK_NAME
#pragma section=CMB_CODE_SECTION_NAME
#elif defined(__GNUC__)
extern const int CMB_CSTACK_BLOCK_START;
extern const int CMB_CSTACK_BLOCK_END;
extern const int CMB_CODE_SECTION_START;
extern const int CMB_CODE_SECTION_END;
#else
#error "not supported compiler"
#endif
enum {
PRINT_MAIN_STACK_CFG_ERROR,
PRINT_FIRMWARE_INFO,
PRINT_ASSERT_ON_THREAD,
PRINT_ASSERT_ON_HANDLER,
PRINT_THREAD_STACK_INFO,
PRINT_MAIN_STACK_INFO,
PRINT_THREAD_STACK_OVERFLOW,
PRINT_MAIN_STACK_OVERFLOW,
PRINT_CALL_STACK_INFO,
PRINT_CALL_STACK_ERR,
PRINT_FAULT_ON_THREAD,
PRINT_FAULT_ON_HANDLER,
PRINT_REGS_TITLE,
PRINT_HFSR_VECTBL,
PRINT_MFSR_IACCVIOL,
PRINT_MFSR_DACCVIOL,
PRINT_MFSR_MUNSTKERR,
PRINT_MFSR_MSTKERR,
PRINT_MFSR_MLSPERR,
PRINT_BFSR_IBUSERR,
PRINT_BFSR_PRECISERR,
PRINT_BFSR_IMPREISERR,
PRINT_BFSR_UNSTKERR,
PRINT_BFSR_STKERR,
PRINT_BFSR_LSPERR,
PRINT_UFSR_UNDEFINSTR,
PRINT_UFSR_INVSTATE,
PRINT_UFSR_INVPC,
PRINT_UFSR_NOCP,
#if (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M33)
PRINT_UFSR_STKOF,
#endif
PRINT_UFSR_UNALIGNED,
PRINT_UFSR_DIVBYZERO0,
PRINT_DFSR_HALTED,
PRINT_DFSR_BKPT,
PRINT_DFSR_DWTTRAP,
PRINT_DFSR_VCATCH,
PRINT_DFSR_EXTERNAL,
PRINT_MMAR,
PRINT_BFAR,
};
static const char * const print_info[] = {
#if (CMB_PRINT_LANGUAGE == CMB_PRINT_LANGUAGE_ENGLISH)
#include "Languages/en-US/cmb_en_US.h"
#elif (CMB_PRINT_LANGUAGE == CMB_PRINT_LANGUAGE_CHINESE)
#include "Languages/zh-CN/cmb_zh_CN.h"
#elif (CMB_PRINT_LANGUAGE == CMB_PRINT_LANGUAGE_CHINESE_UTF8)
#include "Languages/zh-CN/cmb_zh_CN_UTF8.h"
#else
#error "CMB_PRINT_LANGUAGE defined error in 'cmb_cfg.h'"
#endif
};
static const char* fw_name;
static const char* hw_ver;
static const char* sw_ver;
static uint32_t main_stack_start_addr = 0;
static size_t main_stack_size = 0;
static uint32_t code_start_addr = 0;
static size_t code_size = 0;
static bool init_ok = false;
static char call_stack_info[CMB_CALL_STACK_MAX_DEPTH * (8 + 1)] = { 0 };
static bool on_fault = false;
static bool stack_is_overflow = false;
static struct cmb_hard_fault_regs regs;
#if (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M4) || (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M7) || \
(CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M33)
static bool statck_has_fpu_regs = false;
#endif
static bool on_thread_before_fault = false;
/**
* library initialize
*/
void cm_backtrace_init(const char *firmware_name, const char *hardware_ver, const char *software_ver) {
fw_name = firmware_name;
hw_ver = hardware_ver;
sw_ver = software_ver;
#if defined(__ARMCC_VERSION)
main_stack_start_addr = (uint32_t)&CSTACK_BLOCK_START(CMB_CSTACK_BLOCK_NAME);
main_stack_size = (uint32_t)&CSTACK_BLOCK_END(CMB_CSTACK_BLOCK_NAME) - main_stack_start_addr;
code_start_addr = (uint32_t)&CODE_SECTION_START(CMB_CODE_SECTION_NAME);
code_size = (uint32_t)&CODE_SECTION_END(CMB_CODE_SECTION_NAME) - code_start_addr;
#elif defined(__ICCARM__)
main_stack_start_addr = (uint32_t)__section_begin(CMB_CSTACK_BLOCK_NAME);
main_stack_size = (uint32_t)__section_end(CMB_CSTACK_BLOCK_NAME) - main_stack_start_addr;
code_start_addr = (uint32_t)__section_begin(CMB_CODE_SECTION_NAME);
code_size = (uint32_t)__section_end(CMB_CODE_SECTION_NAME) - code_start_addr;
#elif defined(__GNUC__)
main_stack_start_addr = (uint32_t)(&CMB_CSTACK_BLOCK_START);
main_stack_size = (uint32_t)(&CMB_CSTACK_BLOCK_END) - main_stack_start_addr;
code_start_addr = (uint32_t)(&CMB_CODE_SECTION_START);
code_size = (uint32_t)(&CMB_CODE_SECTION_END) - code_start_addr;
#else
#error "not supported compiler"
#endif
if (main_stack_size == 0) {
cmb_println(print_info[PRINT_MAIN_STACK_CFG_ERROR]);
return;
}
init_ok = true;
}
/**
* print firmware information, such as: firmware name, hardware version, software version
*/
void cm_backtrace_firmware_info(void) {
cmb_println(print_info[PRINT_FIRMWARE_INFO], fw_name, sw_ver);
}
#ifdef CMB_USING_OS_PLATFORM
/**
* Get current thread stack information
*
* @param sp stack current pointer
* @param start_addr stack start address
* @param size stack size
*/
static void get_cur_thread_stack_info(uint32_t sp, uint32_t *start_addr, size_t *size) {
CMB_ASSERT(start_addr);
CMB_ASSERT(size);
#if (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_RTT)
*start_addr = (uint32_t) rt_thread_self()->stack_addr;
*size = rt_thread_self()->stack_size;
#elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_UCOSII)
extern OS_TCB *OSTCBCur;
*start_addr = (uint32_t) OSTCBCur->OSTCBStkBottom;
*size = OSTCBCur->OSTCBStkSize * sizeof(OS_STK);
#elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_UCOSIII)
extern OS_TCB *OSTCBCurPtr;
*start_addr = (uint32_t) OSTCBCurPtr->StkBasePtr;
*size = OSTCBCurPtr->StkSize * sizeof(CPU_STK_SIZE);
#elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_FREERTOS)
*start_addr = (uint32_t)vTaskStackAddr();
*size = vTaskStackSize() * sizeof( StackType_t );
#elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_RTX5)
osRtxThread_t *thread = osRtxInfo.thread.run.curr;
*start_addr = (uint32_t)thread->stack_mem;
*size = thread->stack_size;
#endif
}
/**
* Get current thread name
*/
static const char *get_cur_thread_name(void) {
#if (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_RTT)
return rt_thread_self()->name;
#elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_UCOSII)
extern OS_TCB *OSTCBCur;
#if OS_TASK_NAME_SIZE > 0 || OS_TASK_NAME_EN > 0
return (const char *)OSTCBCur->OSTCBTaskName;
#else
return NULL;
#endif /* OS_TASK_NAME_SIZE > 0 || OS_TASK_NAME_EN > 0 */
#elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_UCOSIII)
extern OS_TCB *OSTCBCurPtr;
return (const char *)OSTCBCurPtr->NamePtr;
#elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_FREERTOS)
return vTaskName();
#elif (CMB_OS_PLATFORM_TYPE == CMB_OS_PLATFORM_RTX5)
osThreadId_t id = osThreadGetId();
return osThreadGetName(id);
#endif
}
#endif /* CMB_USING_OS_PLATFORM */
#ifdef CMB_USING_DUMP_STACK_INFO
/**
* dump current stack information
*/
static void dump_stack(uint32_t stack_start_addr, size_t stack_size, uint32_t *stack_pointer) {
if (stack_is_overflow) {
if (on_thread_before_fault) {
cmb_println(print_info[PRINT_THREAD_STACK_OVERFLOW], stack_pointer);
} else {
cmb_println(print_info[PRINT_MAIN_STACK_OVERFLOW], stack_pointer);
}
if ((uint32_t) stack_pointer < stack_start_addr) {
stack_pointer = (uint32_t *) stack_start_addr;
} else if ((uint32_t) stack_pointer > stack_start_addr + stack_size) {
stack_pointer = (uint32_t *) (stack_start_addr + stack_size);
}
}
cmb_println(print_info[PRINT_THREAD_STACK_INFO]);
for (; (uint32_t) stack_pointer < stack_start_addr + stack_size; stack_pointer++) {
cmb_println(" addr: %08x data: %08x", (unsigned int)stack_pointer, (unsigned int)*stack_pointer);
}
cmb_println("====================================");
}
#endif /* CMB_USING_DUMP_STACK_INFO */
/* check the disassembly instruction is 'BL' or 'BLX' */
static bool disassembly_ins_is_bl_blx(uint32_t addr) {
uint16_t ins1 = *((uint16_t *)addr);
uint16_t ins2 = *((uint16_t *)(addr + 2));
#define BL_INS_MASK 0xF800
#define BL_INS_HIGH 0xF800
#define BL_INS_LOW 0xF000
#define BLX_INX_MASK 0xFF00
#define BLX_INX 0x4700
if ((ins2 & BL_INS_MASK) == BL_INS_HIGH && (ins1 & BL_INS_MASK) == BL_INS_LOW) {
return true;
} else if ((ins2 & BLX_INX_MASK) == BLX_INX) {
return true;
} else {
return false;
}
}
/**
* backtrace function call stack
*
* @param buffer call stack buffer
* @param size buffer size
* @param sp stack pointer
*
* @return depth
*/
size_t cm_backtrace_call_stack(uint32_t *buffer, size_t size, uint32_t sp) {
uint32_t stack_start_addr = main_stack_start_addr, pc;
size_t depth = 0, stack_size = main_stack_size;
bool regs_saved_lr_is_valid = false;
if (on_fault) {
if (!stack_is_overflow) {
/* first depth is PC */
buffer[depth++] = regs.saved.pc;
/* fix the LR address in thumb mode */
pc = regs.saved.lr - 1;
if ((pc >= code_start_addr) && (pc <= code_start_addr + code_size) && (depth < CMB_CALL_STACK_MAX_DEPTH)
&& (depth < size)) {
buffer[depth++] = pc;
regs_saved_lr_is_valid = true;
}
}
#ifdef CMB_USING_OS_PLATFORM
/* program is running on thread before fault */
if (on_thread_before_fault) {
get_cur_thread_stack_info(sp, &stack_start_addr, &stack_size);
}
} else {
/* OS environment */
if (cmb_get_sp() == cmb_get_psp()) {
get_cur_thread_stack_info(sp, &stack_start_addr, &stack_size);
}
#endif /* CMB_USING_OS_PLATFORM */
}
if (stack_is_overflow) {
if (sp < stack_start_addr) {
sp = stack_start_addr;
} else if (sp > stack_start_addr + stack_size) {
sp = stack_start_addr + stack_size;
}
}
/* copy called function address */
for (; sp < stack_start_addr + stack_size; sp += sizeof(size_t)) {
/* the *sp value may be LR, so need decrease a word to PC */
pc = *((uint32_t *) sp) - sizeof(size_t);
/* the Cortex-M using thumb instruction, so the pc must be an odd number */
if (pc % 2 == 0) {
continue;
}
/* fix the PC address in thumb mode */
pc = *((uint32_t *) sp) - 1;
if ((pc >= code_start_addr + sizeof(size_t)) && (pc <= code_start_addr + code_size) && (depth < CMB_CALL_STACK_MAX_DEPTH)
/* check the the instruction before PC address is 'BL' or 'BLX' */
&& disassembly_ins_is_bl_blx(pc - sizeof(size_t)) && (depth < size)) {
/* the second depth function may be already saved, so need ignore repeat */
if ((depth == 2) && regs_saved_lr_is_valid && (pc == buffer[1])) {
continue;
}
buffer[depth++] = pc;
}
}
return depth;
}
/**
* dump function call stack
*
* @param sp stack pointer
*/
static void print_call_stack(uint32_t sp) {
size_t i, cur_depth = 0;
uint32_t call_stack_buf[CMB_CALL_STACK_MAX_DEPTH] = {0};
cur_depth = cm_backtrace_call_stack(call_stack_buf, CMB_CALL_STACK_MAX_DEPTH, sp);
for (i = 0; i < cur_depth; i++) {
sprintf(call_stack_info + i * (8 + 1), "%08lx", (unsigned long)call_stack_buf[i]);
call_stack_info[i * (8 + 1) + 8] = ' ';
}
if (cur_depth) {
call_stack_info[cur_depth * (8 + 1) - 1] = '\0';
cmb_println(print_info[PRINT_CALL_STACK_INFO], fw_name, CMB_ELF_FILE_EXTENSION_NAME, call_stack_info);
} else {
cmb_println(print_info[PRINT_CALL_STACK_ERR]);
}
}
/**
* backtrace for assert
*
* @param sp the stack pointer when on assert occurred
*/
void cm_backtrace_assert(uint32_t sp) {
CMB_ASSERT(init_ok);
#ifdef CMB_USING_OS_PLATFORM
uint32_t cur_stack_pointer = cmb_get_sp();
#endif
cmb_println("\n");
cm_backtrace_firmware_info();
#ifdef CMB_USING_OS_PLATFORM
/* OS environment */
if (cur_stack_pointer == cmb_get_msp()) {
cmb_println(print_info[PRINT_ASSERT_ON_HANDLER]);
#ifdef CMB_USING_DUMP_STACK_INFO
dump_stack(main_stack_start_addr, main_stack_size, (uint32_t *) sp);
#endif /* CMB_USING_DUMP_STACK_INFO */
} else if (cur_stack_pointer == cmb_get_psp()) {
cmb_println(print_info[PRINT_ASSERT_ON_THREAD], get_cur_thread_name());
#ifdef CMB_USING_DUMP_STACK_INFO
uint32_t stack_start_addr;
size_t stack_size;
get_cur_thread_stack_info(sp, &stack_start_addr, &stack_size);
dump_stack(stack_start_addr, stack_size, (uint32_t *) sp);
#endif /* CMB_USING_DUMP_STACK_INFO */
}
#else
/* bare metal(no OS) environment */
#ifdef CMB_USING_DUMP_STACK_INFO
dump_stack(main_stack_start_addr, main_stack_size, (uint32_t *) sp);
#endif /* CMB_USING_DUMP_STACK_INFO */
#endif /* CMB_USING_OS_PLATFORM */
print_call_stack(sp);
}
#if (CMB_CPU_PLATFORM_TYPE != CMB_CPU_ARM_CORTEX_M0)
/**
* fault diagnosis then print cause of fault
*/
static void fault_diagnosis(void) {
if (regs.hfsr.bits.VECTBL) {
cmb_println(print_info[PRINT_HFSR_VECTBL]);
}
if (regs.hfsr.bits.FORCED) {
/* Memory Management Fault */
if (regs.mfsr.value) {
if (regs.mfsr.bits.IACCVIOL) {
cmb_println(print_info[PRINT_MFSR_IACCVIOL]);
}
if (regs.mfsr.bits.DACCVIOL) {
cmb_println(print_info[PRINT_MFSR_DACCVIOL]);
}
if (regs.mfsr.bits.MUNSTKERR) {
cmb_println(print_info[PRINT_MFSR_MUNSTKERR]);
}
if (regs.mfsr.bits.MSTKERR) {
cmb_println(print_info[PRINT_MFSR_MSTKERR]);
}
#if (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M4) || (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M7) || \
(CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M33)
if (regs.mfsr.bits.MLSPERR) {
cmb_println(print_info[PRINT_MFSR_MLSPERR]);
}
#endif
if (regs.mfsr.bits.MMARVALID) {
if (regs.mfsr.bits.IACCVIOL || regs.mfsr.bits.DACCVIOL) {
cmb_println(print_info[PRINT_MMAR], regs.mmar);
}
}
}
/* Bus Fault */
if (regs.bfsr.value) {
if (regs.bfsr.bits.IBUSERR) {
cmb_println(print_info[PRINT_BFSR_IBUSERR]);
}
if (regs.bfsr.bits.PRECISERR) {
cmb_println(print_info[PRINT_BFSR_PRECISERR]);
}
if (regs.bfsr.bits.IMPREISERR) {
cmb_println(print_info[PRINT_BFSR_IMPREISERR]);
}
if (regs.bfsr.bits.UNSTKERR) {
cmb_println(print_info[PRINT_BFSR_UNSTKERR]);
}
if (regs.bfsr.bits.STKERR) {
cmb_println(print_info[PRINT_BFSR_STKERR]);
}
#if (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M4) || (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M7) || \
(CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M33)
if (regs.bfsr.bits.LSPERR) {
cmb_println(print_info[PRINT_BFSR_LSPERR]);
}
#endif
if (regs.bfsr.bits.BFARVALID) {
if (regs.bfsr.bits.PRECISERR) {
cmb_println(print_info[PRINT_BFAR], regs.bfar);
}
}
}
/* Usage Fault */
if (regs.ufsr.value) {
if (regs.ufsr.bits.UNDEFINSTR) {
cmb_println(print_info[PRINT_UFSR_UNDEFINSTR]);
}
if (regs.ufsr.bits.INVSTATE) {
cmb_println(print_info[PRINT_UFSR_INVSTATE]);
}
if (regs.ufsr.bits.INVPC) {
cmb_println(print_info[PRINT_UFSR_INVPC]);
}
if (regs.ufsr.bits.NOCP) {
cmb_println(print_info[PRINT_UFSR_NOCP]);
}
#if (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M33)
if (regs.ufsr.bits.STKOF) {
cmb_println(print_info[PRINT_UFSR_STKOF]);
}
#endif
if (regs.ufsr.bits.UNALIGNED) {
cmb_println(print_info[PRINT_UFSR_UNALIGNED]);
}
if (regs.ufsr.bits.DIVBYZERO0) {
cmb_println(print_info[PRINT_UFSR_DIVBYZERO0]);
}
}
}
/* Debug Fault */
if (regs.hfsr.bits.DEBUGEVT) {
if (regs.dfsr.value) {
if (regs.dfsr.bits.HALTED) {
cmb_println(print_info[PRINT_DFSR_HALTED]);
}
if (regs.dfsr.bits.BKPT) {
cmb_println(print_info[PRINT_DFSR_BKPT]);
}
if (regs.dfsr.bits.DWTTRAP) {
cmb_println(print_info[PRINT_DFSR_DWTTRAP]);
}
if (regs.dfsr.bits.VCATCH) {
cmb_println(print_info[PRINT_DFSR_VCATCH]);
}
if (regs.dfsr.bits.EXTERNAL) {
cmb_println(print_info[PRINT_DFSR_EXTERNAL]);
}
}
}
}
#endif /* (CMB_CPU_PLATFORM_TYPE != CMB_CPU_ARM_CORTEX_M0) */
#if (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M4) || (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M7) || \
(CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M33)
static uint32_t statck_del_fpu_regs(uint32_t fault_handler_lr, uint32_t sp) {
statck_has_fpu_regs = (fault_handler_lr & (1UL << 4)) == 0 ? true : false;
/* the stack has S0~S15 and FPSCR registers when statck_has_fpu_regs is true, double word align */
return statck_has_fpu_regs == true ? sp + sizeof(size_t) * 18 : sp;
}
#endif
/**
* backtrace for fault
* @note only call once
*
* @param fault_handler_lr the LR register value on fault handler
* @param fault_handler_sp the stack pointer on fault handler
*/
void cm_backtrace_fault(uint32_t fault_handler_lr, uint32_t fault_handler_sp) {
uint32_t stack_pointer = fault_handler_sp, saved_regs_addr = stack_pointer;
const char *regs_name[] = { "R0 ", "R1 ", "R2 ", "R3 ", "R12", "LR ", "PC ", "PSR" };
#ifdef CMB_USING_DUMP_STACK_INFO
uint32_t stack_start_addr = main_stack_start_addr;
size_t stack_size = main_stack_size;
#endif
CMB_ASSERT(init_ok);
/* only call once */
CMB_ASSERT(!on_fault);
on_fault = true;
cmb_println("\n");
cm_backtrace_firmware_info();
#ifdef CMB_USING_OS_PLATFORM
on_thread_before_fault = fault_handler_lr & (1UL << 2);
/* check which stack was used before (MSP or PSP) */
if (on_thread_before_fault) {
cmb_println(print_info[PRINT_FAULT_ON_THREAD], get_cur_thread_name() != NULL ? get_cur_thread_name() : "NO_NAME");
saved_regs_addr = stack_pointer = cmb_get_psp();
#ifdef CMB_USING_DUMP_STACK_INFO
get_cur_thread_stack_info(stack_pointer, &stack_start_addr, &stack_size);
#endif /* CMB_USING_DUMP_STACK_INFO */
} else {
cmb_println(print_info[PRINT_FAULT_ON_HANDLER]);
}
#else
/* bare metal(no OS) environment */
cmb_println(print_info[PRINT_FAULT_ON_HANDLER]);
#endif /* CMB_USING_OS_PLATFORM */
/* delete saved R0~R3, R12, LR,PC,xPSR registers space */
stack_pointer += sizeof(size_t) * 8;
#if (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M4) || (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M7) || \
(CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M33)
stack_pointer = statck_del_fpu_regs(fault_handler_lr, stack_pointer);
#endif /* (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M4) || (CMB_CPU_PLATFORM_TYPE == CMB_CPU_ARM_CORTEX_M7) */
#ifdef CMB_USING_DUMP_STACK_INFO
/* check stack overflow */
if (stack_pointer < stack_start_addr || stack_pointer > stack_start_addr + stack_size) {
stack_is_overflow = true;
}
/* dump stack information */
dump_stack(stack_start_addr, stack_size, (uint32_t *) stack_pointer);
#endif /* CMB_USING_DUMP_STACK_INFO */
/* the stack frame may be get failed when it is overflow */
if (!stack_is_overflow) {
/* dump register */
cmb_println(print_info[PRINT_REGS_TITLE]);
regs.saved.r0 = ((uint32_t *)saved_regs_addr)[0]; // Register R0
regs.saved.r1 = ((uint32_t *)saved_regs_addr)[1]; // Register R1
regs.saved.r2 = ((uint32_t *)saved_regs_addr)[2]; // Register R2
regs.saved.r3 = ((uint32_t *)saved_regs_addr)[3]; // Register R3
regs.saved.r12 = ((uint32_t *)saved_regs_addr)[4]; // Register R12
regs.saved.lr = ((uint32_t *)saved_regs_addr)[5]; // Link register LR
regs.saved.pc = ((uint32_t *)saved_regs_addr)[6]; // Program counter PC
regs.saved.psr.value = ((uint32_t *)saved_regs_addr)[7]; // Program status word PSR
cmb_println(" %s: %08x %s: %08x %s: %08x %s: %08x", regs_name[0], regs.saved.r0,
regs_name[1], regs.saved.r1,
regs_name[2], regs.saved.r2,
regs_name[3], regs.saved.r3);
cmb_println(" %s: %08x %s: %08x %s: %08x %s: %08x", regs_name[4], regs.saved.r12,
regs_name[5], regs.saved.lr,
regs_name[6], regs.saved.pc,
regs_name[7], regs.saved.psr.value);
cmb_println("==============================================================");
}
/* the Cortex-M0 is not support fault diagnosis */
#if (CMB_CPU_PLATFORM_TYPE != CMB_CPU_ARM_CORTEX_M0)
regs.syshndctrl.value = CMB_SYSHND_CTRL; // System Handler Control and State Register
regs.mfsr.value = CMB_NVIC_MFSR; // Memory Fault Status Register
regs.mmar = CMB_NVIC_MMAR; // Memory Management Fault Address Register
regs.bfsr.value = CMB_NVIC_BFSR; // Bus Fault Status Register
regs.bfar = CMB_NVIC_BFAR; // Bus Fault Manage Address Register
regs.ufsr.value = CMB_NVIC_UFSR; // Usage Fault Status Register
regs.hfsr.value = CMB_NVIC_HFSR; // Hard Fault Status Register
regs.dfsr.value = CMB_NVIC_DFSR; // Debug Fault Status Register
regs.afsr = CMB_NVIC_AFSR; // Auxiliary Fault Status Register
fault_diagnosis();
#endif
print_call_stack(stack_pointer);
}