esp-idf/components/esp_system/hw_stack_guard.c

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/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "hal/assist_debug_hal.h"
#include "esp_private/hw_stack_guard.h"
#include "esp_private/periph_ctrl.h"
#include "esp_private/startup_internal.h"
#include "soc/soc_caps.h"
#include "esp_rom_sys.h"
#include "esp_cpu.h"
ESP_SYSTEM_INIT_FN(esp_hw_stack_guard_init, ESP_SYSTEM_INIT_ALL_CORES, 101)
{
uint32_t core_id = esp_cpu_get_core_id();
if (core_id == 0) {
/* initialize the peripheral only when running on core 0 */
periph_module_enable(PERIPH_ASSIST_DEBUG_MODULE);
periph_module_reset(PERIPH_ASSIST_DEBUG_MODULE);
}
/* just in case, disable the interrupt and clear pending status */
assist_debug_hal_sp_int_disable(core_id);
assist_debug_hal_sp_int_clear(core_id);
/*
* enable interrupt
* Note: to control hw_stack_guard use monitor enable/disable because in case:
* - monitor == active
* - interrupt != active
* - trigger event happened
* - you get an interrupt right after enabling interrupts
* So, use monitor to disable hw_guard to avoid false-positives.
* And keep interrupt always enabled for better performace (don't spend cpu time for enable/disable)
*/
assist_debug_hal_sp_int_enable(core_id);
/* enable interrup routine */
esp_rom_route_intr_matrix(core_id, ETS_ASSIST_DEBUG_INTR_SOURCE, ETS_ASSIST_DEBUG_INUM);
esprv_intc_int_set_type(ETS_ASSIST_DEBUG_INUM, INTR_TYPE_LEVEL);
esprv_intc_int_set_priority(ETS_ASSIST_DEBUG_INUM, SOC_INTERRUPT_LEVEL_MEDIUM);
ESP_INTR_ENABLE(ETS_ASSIST_DEBUG_INUM);
return ESP_OK;
}
/* The functions below are designed to be used in interrupt/panic handler
* In case using them in user's code put them into critical section */
void esp_hw_stack_guard_monitor_start(void)
{
uint32_t core_id = esp_cpu_get_core_id();
/* enable monitor. Interrupt is always enabled (see comment in esp_hw_stack_guard_init()) */
assist_debug_hal_sp_mon_enable(core_id);
}
void esp_hw_stack_guard_monitor_stop(void)
{
uint32_t core_id = esp_cpu_get_core_id();
/* disable monitor. Interrupt is always enabled (see comment in esp_hw_stack_guard_init()) */
assist_debug_hal_sp_mon_disable(core_id);
}
void esp_hw_stack_guard_set_bounds(uint32_t sp_min, uint32_t sp_max)
{
uint32_t core_id = esp_cpu_get_core_id();
assist_debug_hal_set_sp_bounds(core_id, sp_min, sp_max);
}
void esp_hw_stack_guard_get_bounds(uint32_t *sp_min, uint32_t *sp_max)
{
uint32_t core_id = esp_cpu_get_core_id();
assist_debug_hal_get_sp_bounds(core_id, sp_min, sp_max);
}
bool esp_hw_stack_guard_is_fired(void)
{
uint32_t core_id = esp_cpu_get_core_id();
return assist_debug_hal_is_sp_ovf_fired(core_id);
}
uint32_t esp_hw_stack_guard_get_pc(void)
{
uint32_t core_id = esp_cpu_get_core_id();
return assist_debug_hal_get_sp_ovf_pc(core_id);
}