299 lines
8.6 KiB
C
299 lines
8.6 KiB
C
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/*
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* Copyright lizhirui
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-05-18 lizhirui the first version
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* 2021-05-20 lizhirui add os debug support
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*/
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#include <rtthread.h>
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#include "symbol_analysis.h"
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#define MEMORY_BASE 0x40000000
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#define MEMORY_SIZE (128 * 0x100000)
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extern rt_size_t _osdebug_start;
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static os_symtab_header *symtab_header = (os_symtab_header *)&_osdebug_start;
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//该函数用于在指定的表中查找某个地址对应的符号的描述结构体指针，返回值的符号遵循规则详见文档
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os_symtab_item *find_symbol_table(rt_size_t symbol_table_addr,rt_size_t symbol_num,rt_size_t address)
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{
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rt_size_t left = 0;
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rt_size_t right = symbol_num;
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os_symtab_item *sym_table = (os_symtab_item *)((rt_size_t)&_osdebug_start + symbol_table_addr);
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while(left < right)
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{
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rt_size_t mid = (left + right) >> 1;
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//rt_kprintf("left = %d,right = %d,mid = %d\n",left,right,mid);
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if(address < sym_table[mid].address)
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{
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right = mid;
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while((right < symbol_num) && ((right - 1) >= 0) && (sym_table[right].address == sym_table[right - 1].address))
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{
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right--;
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}
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}
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else if(address == sym_table[mid].address)
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{
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left = mid + 1;
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break;
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}
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else
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{
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left = mid;
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while((left >= 0) && ((left + 1) < symbol_num) && (sym_table[left].address == sym_table[left + 1].address))
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{
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left++;
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}
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left++;
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}
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}
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left--;
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if(left == ((rt_size_t)-1))
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{
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return RT_NULL;
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}
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while((left < symbol_num) && ((left - 1) >= 0) && (sym_table[left].address == sym_table[left - 1].address))
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{
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left--;
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}
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return &sym_table[left];
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}
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//该函数用于根据给定的符号指针从字符串表中找到对应的符号名指针并返回
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const char *get_symbol_name(os_symtab_item *symbol)
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{
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return (const char *)((rt_size_t)&_osdebug_start + symtab_header -> string_table_offset + symbol -> name_offset);
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}
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//该函数可以根据给定的符号和地址向中断打印出标准格式的符号信息
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void print_symbol(os_symtab_item *symbol,rt_size_t address)
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{
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rt_kprintf("<%s(0x%p)",get_symbol_name(symbol),symbol -> address);
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if(symbol -> size)
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{
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rt_kprintf(" : 0x%x>",symbol -> size);
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}
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else
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{
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rt_kprintf(">");
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}
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if(address > symbol -> address)
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{
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rt_kprintf(" + 0x%x",address - symbol -> address);
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}
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}
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//该函数用于打印出一个地址关联的全部符号信息
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void print_symbol_info(rt_size_t address,rt_bool_t function)
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{
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os_symtab_item *function_symbol = find_symbol_table(symtab_header -> function_table_offset,symtab_header -> function_table_num,address);
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os_symtab_item *object_symbol = find_symbol_table(symtab_header -> object_table_offset,symtab_header -> object_table_num,address);
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os_symtab_item *general_symbol = find_symbol_table(symtab_header -> general_symbol_table_offset,symtab_header -> general_symbol_table_num,address);
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const char *dot = "";
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rt_bool_t valid = RT_FALSE;
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if(function)
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{
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while(function_symbol != RT_NULL)
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{
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if((function_symbol -> address + function_symbol -> size) > address)
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{
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rt_kprintf(dot);
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print_symbol(function_symbol,address);
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dot = ",";
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valid = RT_TRUE;
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}
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if(((rt_size_t)(function_symbol + 1)) >= (((rt_size_t)&_osdebug_start) + symtab_header -> function_table_offset + symtab_header -> function_table_num * sizeof(os_symtab_item)))
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{
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break;
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}
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if(function_symbol[0].address == function_symbol[1].address)
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{
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function_symbol++;
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}
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break;
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}
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if(!valid)
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{
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while(general_symbol != RT_NULL)
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{
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rt_kprintf(dot);
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print_symbol(general_symbol,address);
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dot = ",";
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valid = RT_TRUE;
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if(((rt_size_t)(general_symbol + 1)) >= (((rt_size_t)&_osdebug_start) + symtab_header -> general_symbol_table_offset + symtab_header -> general_symbol_table_num * sizeof(os_symtab_item)))
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{
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break;
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}
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if(general_symbol[0].address == general_symbol[1].address)
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{
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general_symbol++;
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}
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break;
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}
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while(object_symbol != RT_NULL)
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{
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if((object_symbol -> address + object_symbol -> size) > address)
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{
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rt_kprintf(dot);
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print_symbol(object_symbol,address);
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dot = ",";
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valid = RT_TRUE;
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}
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if(((rt_size_t)(object_symbol + 1)) >= (((rt_size_t)&_osdebug_start) + symtab_header -> object_table_offset + symtab_header -> object_table_num * sizeof(os_symtab_item)))
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{
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break;
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}
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if(object_symbol[0].address == object_symbol[1].address)
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{
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object_symbol++;
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}
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break;
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}
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}
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}
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else
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{
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while(object_symbol != RT_NULL)
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{
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if((object_symbol -> address + object_symbol -> size) > address)
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{
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rt_kprintf(dot);
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print_symbol(object_symbol,address);
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dot = ",";
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valid = RT_TRUE;
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}
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if(((rt_size_t)(object_symbol + 1)) >= (((rt_size_t)&_osdebug_start) + symtab_header -> object_table_offset + symtab_header -> object_table_num * sizeof(os_symtab_item)))
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{
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break;
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}
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if(object_symbol[0].address == object_symbol[1].address)
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{
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object_symbol++;
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}
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break;
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}
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if(!valid)
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{
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while(general_symbol != RT_NULL)
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{
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rt_kprintf(dot);
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print_symbol(general_symbol,address);
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dot = ",";
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valid = RT_TRUE;
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if(((rt_size_t)(general_symbol + 1)) >= (((rt_size_t)&_osdebug_start) + symtab_header -> general_symbol_table_offset + symtab_header -> general_symbol_table_num * sizeof(os_symtab_item)))
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{
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break;
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}
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if(general_symbol[0].address == general_symbol[1].address)
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{
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general_symbol++;
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}
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break;
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}
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while(function_symbol != RT_NULL)
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{
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if((function_symbol -> address + function_symbol -> size) > address)
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{
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rt_kprintf(dot);
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print_symbol(function_symbol,address);
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dot = ",";
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valid = RT_TRUE;
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}
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if(((rt_size_t)(function_symbol + 1)) >= (((rt_size_t)&_osdebug_start) + symtab_header -> function_table_offset + symtab_header -> function_table_num * sizeof(os_symtab_item)))
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{
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break;
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}
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if(function_symbol[0].address == function_symbol[1].address)
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{
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function_symbol++;
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}
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break;
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}
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}
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}
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if(dot == "")
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{
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rt_kprintf("<Unknown Symbol>");
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}
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}
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//该函数用于在出错时打印出栈跟踪信息
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void print_stacktrace(rt_size_t epc,rt_size_t fp)
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{
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rt_kprintf("-----------------------------Dump Stacktrace----------------------------\n\n");
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rt_size_t sp = fp;
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rt_size_t i = 0;
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rt_kprintf("address 0x%p(",epc);
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print_symbol_info(epc,RT_TRUE);
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rt_kprintf(")\n\n");
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while(1)
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{
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if((sp >= MEMORY_BASE) && (sp < (MEMORY_BASE + MEMORY_SIZE)))
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{
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//rt_kprintf("%d: 0x%p\n",i,sp);
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rt_size_t *stack = (rt_size_t *)(sp - sizeof(rt_size_t) * 2);
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rt_size_t ra = stack[1];
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if(!ra)
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{
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break;
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}
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rt_kprintf("return to 0x%p(",ra);
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print_symbol_info(ra,RT_TRUE);
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rt_kprintf(")\n\n");
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//rt_kprintf("ra = 0x%p,fp = 0x%p\n",stack[1],stack[0]);
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sp = stack[0];
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i++;
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}
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else
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{
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break;
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}
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}
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rt_kprintf("---------------------------------Dump OK--------------------------------\n");
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}
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