125 lines
3.3 KiB
C++
125 lines
3.3 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <elf.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <unwindstack/Elf.h>
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#include <unwindstack/Log.h>
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#include <unwindstack/Memory.h>
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int main(int argc, char** argv) {
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if (argc != 2 && argc != 3) {
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printf("Usage: unwind_symbols <ELF_FILE> [<FUNC_ADDRESS>]\n");
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printf(" Dump all function symbols in ELF_FILE. If FUNC_ADDRESS is\n");
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printf(" specified, then get the function at that address.\n");
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printf(" FUNC_ADDRESS must be a hex number.\n");
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return 1;
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}
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struct stat st;
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if (stat(argv[1], &st) == -1) {
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printf("Cannot stat %s: %s\n", argv[1], strerror(errno));
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return 1;
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}
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if (!S_ISREG(st.st_mode)) {
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printf("%s is not a regular file.\n", argv[1]);
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return 1;
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}
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uint64_t func_addr;
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if (argc == 3) {
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char* name;
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func_addr = strtoull(argv[2], &name, 16);
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if (*name != '\0') {
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printf("%s is not a hex number.\n", argv[2]);
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return 1;
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}
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}
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// Send all log messages to stdout.
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unwindstack::log_to_stdout(true);
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unwindstack::Elf elf(unwindstack::Memory::CreateFileMemory(argv[1], 0).release());
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if (!elf.Init() || !elf.valid()) {
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printf("%s is not a valid elf file.\n", argv[1]);
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return 1;
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}
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std::string soname(elf.GetSoname());
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if (!soname.empty()) {
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printf("Soname: %s\n\n", soname.c_str());
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}
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switch (elf.machine_type()) {
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case EM_ARM:
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printf("ABI: arm\n");
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break;
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case EM_AARCH64:
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printf("ABI: arm64\n");
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break;
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case EM_386:
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printf("ABI: x86\n");
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break;
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case EM_X86_64:
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printf("ABI: x86_64\n");
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break;
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default:
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printf("ABI: unknown\n");
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return 1;
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}
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std::string name;
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if (argc == 3) {
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std::string cur_name;
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uint64_t func_offset;
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if (!elf.GetFunctionName(func_addr, &cur_name, &func_offset)) {
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printf("No known function at 0x%" PRIx64 "\n", func_addr);
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return 1;
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}
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printf("<0x%" PRIx64 ">", func_addr - func_offset);
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if (func_offset != 0) {
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printf("+%" PRId64, func_offset);
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}
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printf(": %s\n", cur_name.c_str());
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return 0;
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}
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// This is a crude way to get the symbols in order.
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for (const auto& entry : elf.interface()->pt_loads()) {
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uint64_t start = entry.second.offset;
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uint64_t end = entry.second.table_size;
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for (uint64_t addr = start; addr < end; addr += 4) {
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std::string cur_name;
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uint64_t func_offset;
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if (elf.GetFunctionName(addr, &cur_name, &func_offset)) {
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if (cur_name != name) {
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printf("<0x%" PRIx64 "> Function: %s\n", addr - func_offset, cur_name.c_str());
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}
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name = cur_name;
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}
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}
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}
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return 0;
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}
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