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feat(esp8266): refactor ESP8266(xtensa lx106) panic backtrace function

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This commit is contained in:
dongheng
2019-08-22 20:11:59 +08:00
parent 0193d06019
commit 767d995466
6 changed files with 269 additions and 156 deletions
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1
components/esp8266/CMakeLists.txt
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@ -23,6 +23,7 @@ else()
set(srcs
"source/chip_boot.c"
"source/backtrace.c"
"source/esp_err_to_name.c"
"source/esp_timer.c"
"source/esp_wifi_os_adapter.c"

61
components/esp8266/include/esp8266/backtrace.h Normal file
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@ -0,0 +1,61 @@
// Copyright 2019-2020 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.
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Check if PC pointer locates at code section
*
* @param pc the PC pointer
*
* @return 1 if valid or 0 if invalid
*/
int xt_pc_is_valid(const void *pc);
/**
* @brief Detected recursively and serach the previous PC and SP
*
* @param i_pc the PC address for forward recursive detection
* @param i_sp the SP address for forward recursive detection
* @param i_lr the LR address, maybe it the previous PC address
* @param o_pc the detected previous PC address
* @param o_pc the detected previous SP address
*
* @return 1 if found or 0 if not found
*/
int xt_retaddr_callee(const void *i_pc, const void *i_sp, const void *i_lr, void **o_pc, void **o_sp);
/**
* @brief These functions may be used to get information about the callers of a function.
*
* Using this API instead of "__builtin_return_address".
*
* This function returns the return address of the current function, or of one of its callers.
* The level argument is number of frames to scan up the call stack. A value of 0 yields the
* return address of the current function, a value of 1 yields the return address of the caller
* of the current function, and so forth..
*
* @param lvl caller level
*
* @return the return address of the current function
*/
void *xt_return_address(int lvl);
#ifdef __cplusplus
}
#endif

4
components/esp8266/include/esp8266/eagle_soc.h
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@ -25,7 +25,9 @@
#ifndef _EAGLE_SOC_H_
#define _EAGLE_SOC_H_
#include "sdkconfig.h"
#include <stdint.h>
#include <stddef.h>
#include "driver/soc.h"
/* IO definitions (access restrictions to peripheral registers) */
@ -190,7 +192,7 @@
#define DRAM_SIZE (96 * 1024)
#define IRAM_BASE (0x40100000)
#define IRAM_SIZE (48 * 1024)
#define IRAM_SIZE (CONFIG_SOC_IRAM_SIZE)
#define FLASH_BASE (0x40200000)
#define FLASH_SIZE (1 * 1024 * 1024)

119
components/esp8266/source/backtrace.c Normal file
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@ -0,0 +1,119 @@
// Copyright 2019-2020 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.
#include <stdint.h>
#include "esp8266/eagle_soc.h"
static inline uint32_t prev_text_size(const uint32_t pc)
{
uint32_t size;
extern uint32_t _text_start, _text_end;
if (pc > (uint32_t)&_text_start && pc < (uint32_t)&_text_end) {
size = pc - (uint32_t )&_text_start;
} else if (IS_IRAM(pc)) {
size = pc - IRAM_BASE;
} else {
size = 0;
}
return size;
}
int xt_pc_is_valid(const void *pc)
{
return prev_text_size((uint32_t)pc) ? 1 : 0;
}
int xt_retaddr_callee(const void *i_pc, const void *i_sp, const void *i_lr, void **o_pc, void **o_sp)
{
uint32_t lr = (uint32_t)i_lr;
uint32_t pc = (uint32_t)i_pc;
uint32_t sp = (uint32_t)i_sp;
uint32_t off = 0;
const uint32_t text_size = prev_text_size(pc);
for (; off < text_size; off++) {
if ((*(uint8_t *)(pc - off) == 0x12) &&
(*(uint8_t *)(pc - off + 1) == 0xc1)) {
const int8_t stk_size = *(int8_t *)(pc - off + 2);
if (stk_size >= 0 || stk_size % 16 != 0) {
continue;
}
sp -= stk_size;
pc = *(uint32_t *)(sp - 4);
*o_sp = (void *)sp;
*o_pc = (void *)pc;
break;
} else if ((*(uint8_t *)(pc - off) == 0x92) &&
(((*(uint8_t *)(pc - off + 1)) & 0xf0) == 0xa0) &&
(*(uint8_t *)(pc - off + 3) == 0x90) &&
(*(uint8_t *)(pc - off + 4) == 0x11) &&
(*(uint8_t *)(pc - off + 5) == 0xc0)) {
const uint16_t stk_size = ((*(uint8_t *)(pc - off + 1)) & 0x0f) + (*(uint8_t *)(pc - off + 2));
if (!stk_size || stk_size >= 2048) {
continue;
}
sp += stk_size;
pc = *(uint32_t *)(sp - 4);
*o_sp = (void *)sp;
*o_pc = (void *)pc;
break;
} else if ((*(uint8_t *)(pc - off) == 0x0d) &&
(*(uint8_t *)(pc - off + 1) == 0xf0)) {
pc = lr;
*o_sp = (void *)sp;
*o_pc = (void *)pc;
break;
}
}
return off < text_size ? (xt_pc_is_valid(*o_pc) ? 1 : 0) : 0;
}
void *xt_return_address(int lvl)
{
void *i_sp;
void *i_lr = NULL;
void *i_pc = (void *)((uint32_t)xt_return_address + 32);
void *o_pc = NULL;
void *o_sp;
__asm__ __volatile__(
"mov %0, a1\n"
: "=a"(i_sp)
:
: "memory"
);
lvl += 2;
while(lvl-- && xt_retaddr_callee(i_pc, i_sp, i_lr, &o_pc, &o_sp)) {
i_pc = o_pc;
i_sp = o_sp;
}
return xt_pc_is_valid(o_pc) ? o_pc : NULL;
}