mirror of
https://github.com/espressif/esp-idf.git
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79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/*
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* SPDX-FileCopyrightText: 2020-2021 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "freertos/xtensa_context.h"
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#include "esp_private/panic_internal.h"
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#include "hal/wdt_hal.h"
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extern void esp_panic_handler(panic_info_t *info);
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extern volatile bool g_override_illegal_instruction;
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void __real_esp_panic_handler(panic_info_t *info);
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void __real_esp_panic_handler_reconfigure_wdts(void);
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void __real_soc_hal_stall_core(int core);
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static void disable_all_wdts(void)
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{
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wdt_hal_context_t wdt0_context = {.inst = WDT_MWDT0, .mwdt_dev = &TIMERG0};
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#if SOC_TIMER_GROUPS >= 2
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wdt_hal_context_t wdt1_context = {.inst = WDT_MWDT1, .mwdt_dev = &TIMERG1};
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#endif
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//Todo: Refactor to use Interrupt or Task Watchdog API, and a system level WDT context
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//Task WDT is the Main Watchdog Timer of Timer Group 0
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wdt_hal_write_protect_disable(&wdt0_context);
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wdt_hal_disable(&wdt0_context);
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wdt_hal_write_protect_enable(&wdt0_context);
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#if SOC_TIMER_GROUPS >= 2
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//Interupt WDT is the Main Watchdog Timer of Timer Group 1
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wdt_hal_write_protect_disable(&wdt1_context);
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wdt_hal_disable(&wdt1_context);
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wdt_hal_write_protect_enable(&wdt1_context);
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#endif
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}
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/* Memprot test specific IllegalInstruction exception handler:
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* when testing the protection against a code execution, sample code
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* is being injected into various memory regions which produces
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* EXCCAUSE_ILLEGAL on execution attempt. Such a result is expected
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* but it causes system reboot in the standard panic handler.
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* The following variant of panic handling simply returns back to the
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* next instruction and continues normal execution.
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*
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* NOTE: if EXCCAUSE_ILLEGAL comes from a different source than the testing code
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* the behavior is undefined
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* */
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void __wrap_esp_panic_handler(panic_info_t *info)
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{
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XtExcFrame *frm = (XtExcFrame *)info->frame;
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if ( frm->exccause == EXCCAUSE_ILLEGAL && g_override_illegal_instruction == true ) {
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frm->pc = frm->a0;
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return;
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} else {
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__real_esp_panic_handler(info);
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}
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}
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void __wrap_esp_panic_handler_reconfigure_wdts(void)
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{
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if ( g_override_illegal_instruction == true ) {
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disable_all_wdts();
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return;
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} else {
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__real_esp_panic_handler_reconfigure_wdts();
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}
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}
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void __wrap_soc_hal_stall_core(int core)
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{
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if ( g_override_illegal_instruction == true ) {
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return;
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} else {
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__real_soc_hal_stall_core(core);
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}
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}
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