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fix(core/embed): make HardFault processing safer

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cepetr 2024-08-20 08:55:15 +02:00 committed by cepetr
parent 2bb5b5c0ce
commit 0b93d0d848
1 changed files with 10 additions and 1 deletions
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11
core/embed/trezorhal/stm32u5/fault_handlers.c
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@ -5,7 +5,16 @@ void fault_handlers_init(void) {
SCB->SHCSR |= (SCB_SHCSR_USGFAULTENA_Msk | SCB_SHCSR_BUSFAULTENA_Msk);
}
void HardFault_Handler(void) { error_shutdown("(HF)"); }
void HardFault_Handler(void) {
// A HardFault may also be caused by exception escalation.
// To ensure we have enough space to handle the exception,
// we set the stack pointer to the end of the stack.
extern uint8_t _estack; // linker script symbol
// Fix stack pointer
__set_MSP((uint32_t)&_estack);
error_shutdown("(HF)");
}
void MemManage_Handler(void) { error_shutdown("(MM)"); }