esp-idf/components/esp32/include/esp_core_dump.h

65 lines
2.9 KiB
C

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ESP_CORE_DUMP_H_
#define ESP_CORE_DUMP_H_
/**
* @brief Initializes core dump module internal data.
*
* @note Should be called at system startup.
*/
void esp_core_dump_init();
/**
* @brief Saves core dump to flash.
*
* The structure of data stored in flash is as follows:
* | MAGIC1 |
* | TOTAL_LEN | TASKS_NUM | TCB_SIZE |
* | TCB_ADDR_1 | STACK_TOP_1 | STACK_END_1 | TCB_1 | STACK_1 |
* . . . .
* . . . .
* | TCB_ADDR_N | STACK_TOP_N | STACK_END_N | TCB_N | STACK_N |
* | MAGIC2 |
* Core dump in flash consists of header and data for every task in the system at the moment of crash.
* For flash data integrity control two magic numbers are used at the beginning and the end of core dump.
* The structure of core dump data is described below in details.
* 1) MAGIC1 and MAGIC2 are special numbers stored at the beginning and the end of core dump.
* They are used to control core dump data integrity. Size of every number is 4 bytes.
* 2) Core dump starts with header:
* 2.1) TOTAL_LEN is total length of core dump data in flash including magic numbers. Size is 4 bytes.
* 2.2) TASKS_NUM is the number of tasks for which data are stored. Size is 4 bytes.
* 2.3) TCB_SIZE is the size of task's TCB structure. Size is 4 bytes.
* 3) Core dump header is followed by the data for every task in the system.
* Task data are started with task header:
* 3.1) TCB_ADDR is the address of TCB in memory. Size is 4 bytes.
* 3.2) STACK_TOP is the top of task's stack (address of the topmost stack item). Size is 4 bytes.
* 3.2) STACK_END is the end of task's stack (address from which task's stack starts). Size is 4 bytes.
* 4) Task header is followed by TCB data. Size is TCB_SIZE bytes.
* 5) Task's stack is placed after TCB data. Size is (STACK_END - STACK_TOP) bytes.
*/
void esp_core_dump_to_flash();
/**
* @brief Print base64-encoded core dump to UART.
*
* The structure of core dump data is the same as for data stored in flash (@see esp_core_dump_to_flash) with some notes:
* 1) Magic numbers are not present in core dump printed to UART.
* 2) Since magic numbers are omitted TOTAL_LEN does not include their size.
* 3) Printed base64 data are surrounded with special messages to help user recognize the start and end of actual data.
*/
void esp_core_dump_to_uart();
#endif