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[arch][arm-m] print relevant data on memmanage exceptions

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This commit is contained in:
Travis Geiselbrecht
2015-09-17 15:09:53 -07:00
parent 8e4c0ac594
commit 0f207bbc02
1 changed files with 38 additions and 3 deletions
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41
arch/arm/arm-m/exceptions.c
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@@ -51,6 +51,36 @@ static void hardfault(struct arm_cm_exception_frame *frame)
platform_halt(HALT_ACTION_HALT, HALT_REASON_SW_PANIC);
}
static void memmanage(struct arm_cm_exception_frame *frame)
{
printf("memmanage: ");
dump_frame(frame);
uint32_t mmfsr = SCB->CFSR & 0xff;
if (mmfsr & (1<<0)) { // IACCVIOL
printf("instruction fault\n");
}
if (mmfsr & (1<<1)) { // DACCVIOL
printf("data fault\n");
}
if (mmfsr & (1<<3)) { // MUNSTKERR
printf("fault on exception return\n");
}
if (mmfsr & (1<<4)) { // MSTKERR
printf("fault on exception entry\n");
}
if (mmfsr & (1<<5)) { // MLSPERR
printf("fault on lazy fpu preserve\n");
}
if (mmfsr & (1<<7)) { // MMARVALID
printf("fault address 0x%x\n", SCB->MMFAR);
}
platform_halt(HALT_ACTION_HALT, HALT_REASON_SW_PANIC);
}
static void usagefault(struct arm_cm_exception_frame *frame)
{
printf("usagefault: ");
@@ -88,8 +118,13 @@ __NAKED void _hardfault(void)
void _memmanage(void)
{
printf("memmanage\n");
platform_halt(HALT_ACTION_HALT, HALT_REASON_SW_PANIC);
__asm__ volatile(
"push {r4-r11};"
"mov r0, sp;"
"b %0;"
:: "i" (memmanage)
);
__UNREACHABLE;
}
void _busfault(void)
@@ -127,4 +162,4 @@ void __WEAK _debugmonitor(void)
platform_halt(HALT_ACTION_HALT, HALT_REASON_SW_PANIC);
}
// vim: set noexpandtab: