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panic: dump some instruction memory on IllegalInstruction exception

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This commit is contained in:
Ivan Grokhotkov
2018-12-03 06:57:26 +08:00
parent 41caedd0da
commit 2b58be5a6c
2 changed files with 29 additions and 0 deletions
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27
components/esp32/panic.c
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@ -167,6 +167,7 @@ static const char *edesc[] = {
static void commonErrorHandler(XtExcFrame *frame);
static inline void disableAllWdts();
static void illegal_instruction_helper(XtExcFrame *frame);
//The fact that we've panic'ed probably means the other CPU is now running wild, possibly
//messing up the serial output, so we stall it here.
@ -332,10 +333,36 @@ void xt_unhandled_exception(XtExcFrame *frame)
return;
}
panicPutStr(". Exception was unhandled.\r\n");
if (exccause == 0 /* IllegalInstruction */) {
illegal_instruction_helper(frame);
}
}
commonErrorHandler(frame);
}
static void illegal_instruction_helper(XtExcFrame *frame)
{
/* Print out memory around the instruction word */
uint32_t epc = frame->pc;
epc = (epc & ~0x3) - 4;
/* check that the address was sane */
if (epc < SOC_IROM_MASK_LOW || epc >= SOC_IROM_HIGH) {
return;
}
volatile uint32_t* pepc = (uint32_t*)epc;
panicPutStr("Memory dump at 0x");
panicPutHex(epc);
panicPutStr(": ");
panicPutHex(*pepc);
panicPutStr(" ");
panicPutHex(*(pepc + 1));
panicPutStr(" ");
panicPutHex(*(pepc + 2));
panicPutStr("\r\n");
}
/*
If watchdogs are enabled, the panic handler runs the risk of getting aborted pre-emptively because

2
components/soc/esp32/include/soc/soc.h
View File

@ -283,6 +283,8 @@
#define SOC_DROM_HIGH 0x3F800000
#define SOC_IROM_LOW 0x400D0000
#define SOC_IROM_HIGH 0x40400000
#define SOC_IROM_MASK_LOW 0x40000000
#define SOC_IROM_MASK_HIGH 0x40070000
#define SOC_IRAM_LOW 0x40080000
#define SOC_IRAM_HIGH 0x400A0000
#define SOC_RTC_IRAM_LOW 0x400C0000