esp-idf/tools/test_apps/system/memprot/main/esp32s2/test_panic.c

46 lines
1.4 KiB
C

/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "freertos/xtensa_context.h"
#include "esp_private/panic_internal.h"
extern void esp_panic_handler(panic_info_t *info);
extern volatile bool g_override_illegal_instruction;
void __real_esp_panic_handler(panic_info_t *info);
void __real_esp_cpu_stall(int core_id);
/* Memprot test specific IllegalInstruction exception handler:
* when testing the protection against a code execution, sample code
* is being injected into various memory regions which produces
* EXCCAUSE_ILLEGAL on execution attempt. Such a result is expected
* but it causes system reboot in the standard panic handler.
* The following variant of panic handling simply returns back to the
* next instruction and continues normal execution.
*
* NOTE: if EXCCAUSE_ILLEGAL comes from a different source than the testing code
* the behavior is undefined
* */
void __wrap_esp_panic_handler(panic_info_t *info)
{
XtExcFrame *frm = (XtExcFrame *)info->frame;
if (frm->exccause == EXCCAUSE_ILLEGAL && g_override_illegal_instruction == true) {
frm->pc = frm->a0;
return;
} else {
__real_esp_panic_handler(info);
}
}
void __wrap_esp_cpu_stall(int core_id)
{
if (g_override_illegal_instruction == true) {
return;
} else {
__real_esp_cpu_stall(core_id);
}
}