Fork of the espurna firmware for `mhsw` switches
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// -----------------------------------------------------------------------------
// Save crash info
// Taken from krzychb EspSaveCrash
// https://github.com/krzychb/EspSaveCrash
// -----------------------------------------------------------------------------
#if DEBUG_SUPPORT
#include <stdio.h>
#include <stdarg.h>
#include <EEPROM_Rotate.h>
extern "C" {
#include "user_interface.h"
}
#define SAVE_CRASH_EEPROM_OFFSET 0x0100 // initial address for crash data
/**
* Structure of the single crash data set
*
* 1. Crash time
* 2. Restart reason
* 3. Exception cause
* 4. epc1
* 5. epc2
* 6. epc3
* 7. excvaddr
* 8. depc
* 9. adress of stack start
* 10. adress of stack end
* 11. stack trace size
* 12. stack trace bytes
* ...
*/
#define SAVE_CRASH_CRASH_TIME 0x00 // 4 bytes
#define SAVE_CRASH_RESTART_REASON 0x04 // 1 byte
#define SAVE_CRASH_EXCEPTION_CAUSE 0x05 // 1 byte
#define SAVE_CRASH_EPC1 0x06 // 4 bytes
#define SAVE_CRASH_EPC2 0x0A // 4 bytes
#define SAVE_CRASH_EPC3 0x0E // 4 bytes
#define SAVE_CRASH_EXCVADDR 0x12 // 4 bytes
#define SAVE_CRASH_DEPC 0x16 // 4 bytes
#define SAVE_CRASH_STACK_START 0x1A // 4 bytes
#define SAVE_CRASH_STACK_END 0x1E // 4 bytes
#define SAVE_CRASH_STACK_SIZE 0x22 // 2 bytes
#define SAVE_CRASH_STACK_TRACE 0x24 // variable
#define SAVE_CRASH_STACK_TRACE_MAX 0x80 // limit at 128 bytes (increment/decrement by 16)
uint16_t _save_crash_stack_trace_max = SAVE_CRASH_STACK_TRACE_MAX;
bool _save_crash_enabled = true;
/**
* Save crash information in EEPROM
* This function is called automatically if ESP8266 suffers an exception
* It should be kept quick / consise to be able to execute before hardware wdt may kick in
* This method assumes EEPROM has already been initialized, which is the first thing ESPurna does
*/
extern "C" void custom_crash_callback(struct rst_info * rst_info, uint32_t stack_start, uint32_t stack_end ) {
// Do not record crash data when resetting the board
if (checkNeedsReset()) {
return;
}
// Check if runtime setting disabled this callback
if (!_save_crash_enabled) {
return;
}
// write crash time to EEPROM, which we will later use as a marker that there was a crash
uint32_t crash_time = millis();
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_CRASH_TIME, crash_time);
// rst_info::reason and ::exccause are uint32_t, but are holding small values
EEPROMr.write(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_RESTART_REASON, rst_info->reason);
EEPROMr.write(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EXCEPTION_CAUSE, rst_info->exccause);
// write epc1, epc2, epc3, excvaddr and depc to EEPROM as uint32_t
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EPC1, rst_info->epc1);
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EPC2, rst_info->epc2);
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EPC3, rst_info->epc3);
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EXCVADDR, rst_info->excvaddr);
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_DEPC, rst_info->depc);
// EEPROM size is limited, write as little as possible.
// we sometimes want to avoid big stack traces, e.g. if stack_end == 0x3fffffb0, we are in SYS context.
// but still should get enough relevant info and it is possible to set needed size at build/runtime
const uint16_t stack_size = constrain((stack_end - stack_start), 0, _save_crash_stack_trace_max);
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_STACK_START, stack_start);
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_STACK_END, stack_end);
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_STACK_SIZE, stack_size);
// starting EEPROM address of Embedis data plus reserve
const uint16_t settings_start = (
((SPI_FLASH_SEC_SIZE - settingsSize() + 31) & -32) - 0x20);
// write stack trace to EEPROM and avoid overwriting settings
int16_t eeprom_addr = SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_STACK_TRACE;
for (uint32_t* addr = (uint32_t*)stack_start; addr < (uint32_t*)(stack_start + stack_size); addr++) {
if (eeprom_addr >= settings_start) break;
EEPROMr.put(eeprom_addr, *addr);
eeprom_addr += sizeof(uint32_t);
}
EEPROMr.commit();
}
/**
* Clears crash info
*/
void crashClear() {
uint32_t crash_time = 0xFFFFFFFF;
EEPROMr.put(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_CRASH_TIME, crash_time);
EEPROMr.commit();
}
/**
* Print out crash information that has been previusly saved in EEPROM
*/
void crashDump() {
uint32_t crash_time;
EEPROMr.get(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_CRASH_TIME, crash_time);
if ((crash_time == 0) || (crash_time == 0xFFFFFFFF)) {
DEBUG_MSG_P(PSTR("[DEBUG] No crash info\n"));
return;
}
DEBUG_MSG_P(PSTR("[DEBUG] Latest crash was at %lu ms after boot\n"), crash_time);
DEBUG_MSG_P(PSTR("[DEBUG] Reason of restart: %u\n"), EEPROMr.read(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_RESTART_REASON));
DEBUG_MSG_P(PSTR("[DEBUG] Exception cause: %u\n"), EEPROMr.read(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EXCEPTION_CAUSE));
uint32_t epc1, epc2, epc3, excvaddr, depc;
EEPROMr.get(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EPC1, epc1);
EEPROMr.get(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EPC2, epc2);
EEPROMr.get(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EPC3, epc3);
EEPROMr.get(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_EXCVADDR, excvaddr);
EEPROMr.get(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_DEPC, depc);
DEBUG_MSG_P(PSTR("[DEBUG] epc1=0x%08x epc2=0x%08x epc3=0x%08x\n"), epc1, epc2, epc3);
DEBUG_MSG_P(PSTR("[DEBUG] excvaddr=0x%08x depc=0x%08x\n"), excvaddr, depc);
uint32_t stack_start, stack_end;
uint16_t stack_size;
EEPROMr.get(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_STACK_START, stack_start);
EEPROMr.get(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_STACK_END, stack_end);
EEPROMr.get(SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_STACK_SIZE, stack_size);
DEBUG_MSG_P(PSTR("sp=0x%08x end=0x%08x saved=0x%04x\n\n"), stack_start, stack_end, stack_size);
if (0xFFFF == stack_size) return;
int16_t current_address = SAVE_CRASH_EEPROM_OFFSET + SAVE_CRASH_STACK_TRACE;
uint32_t stack_trace;
DEBUG_MSG_P(PSTR("[DEBUG] >>>stack>>>\n[DEBUG] "));
for (int16_t i = 0; i < stack_size; i += 0x10) {
DEBUG_MSG_P(PSTR("%08x: "), stack_start + i);
for (byte j = 0; j < 4; j++) {
EEPROMr.get(current_address, stack_trace);
DEBUG_MSG_P(PSTR("%08x "), stack_trace);
current_address += 4;
}
DEBUG_MSG_P(PSTR("\n[DEBUG] "));
}
DEBUG_MSG_P(PSTR("<<<stack<<<\n"));
}
void crashSetup() {
#if TERMINAL_SUPPORT
terminalRegisterCommand(F("CRASH"), [](Embedis* e) {
crashDump();
crashClear();
terminalOK();
});
#endif
// Minumum of 16 and align for column formatter in crashDump()
_save_crash_stack_trace_max = getSetting("sysTraceMax", SAVE_CRASH_STACK_TRACE_MAX).toInt();
_save_crash_stack_trace_max = (_save_crash_stack_trace_max + 15) & -16;
setSetting("sysScTraceMax", _save_crash_stack_trace_max);
_save_crash_enabled = getSetting("sysCrashSave", 1).toInt() == 1;
}
#endif // DEBUG_SUPPORT