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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 <elf.h>
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <unwindstack/Elf.h>
#include <unwindstack/Log.h>
#include <unwindstack/Memory.h>
int main(int argc, char** argv) {
if (argc != 2 && argc != 3) {
printf("Usage: unwind_symbols <ELF_FILE> [<FUNC_ADDRESS>]\n");
printf(" Dump all function symbols in ELF_FILE. If FUNC_ADDRESS is\n");
printf(" specified, then get the function at that address.\n");
printf(" FUNC_ADDRESS must be a hex number.\n");
return 1;
}
struct stat st;
if (stat(argv[1], &st) == -1) {
printf("Cannot stat %s: %s\n", argv[1], strerror(errno));
return 1;
}
if (!S_ISREG(st.st_mode)) {
printf("%s is not a regular file.\n", argv[1]);
return 1;
}
uint64_t func_addr;
if (argc == 3) {
char* name;
func_addr = strtoull(argv[2], &name, 16);
if (*name != '\0') {
printf("%s is not a hex number.\n", argv[2]);
return 1;
}
}
// Send all log messages to stdout.
unwindstack::log_to_stdout(true);
unwindstack::MemoryFileAtOffset* memory = new unwindstack::MemoryFileAtOffset;
if (!memory->Init(argv[1], 0)) {
printf("Failed to init\n");
return 1;
}
unwindstack::Elf elf(memory);
if (!elf.Init() || !elf.valid()) {
printf("%s is not a valid elf file.\n", argv[1]);
return 1;
}
std::string soname;
if (elf.GetSoname(&soname)) {
printf("Soname: %s\n\n", soname.c_str());
}
switch (elf.machine_type()) {
case EM_ARM:
printf("ABI: arm\n");
break;
case EM_AARCH64:
printf("ABI: arm64\n");
break;
case EM_386:
printf("ABI: x86\n");
break;
case EM_X86_64:
printf("ABI: x86_64\n");
break;
default:
printf("ABI: unknown\n");
return 1;
}
std::string name;
if (argc == 3) {
std::string cur_name;
uint64_t func_offset;
if (!elf.GetFunctionName(func_addr, &cur_name, &func_offset)) {
printf("No known function at 0x%" PRIx64 "\n", func_addr);
return 1;
}
printf("<0x%" PRIx64 ">", func_addr - func_offset);
if (func_offset != 0) {
printf("+%" PRId64, func_offset);
}
printf(": %s\n", cur_name.c_str());
return 0;
}
// This is a crude way to get the symbols in order.
for (const auto& entry : elf.interface()->pt_loads()) {
uint64_t start = entry.second.offset;
uint64_t end = entry.second.table_size;
for (uint64_t addr = start; addr < end; addr += 4) {
std::string cur_name;
uint64_t func_offset;
if (elf.GetFunctionName(addr, &cur_name, &func_offset)) {
if (cur_name != name) {
printf("<0x%" PRIx64 "> Function: %s\n", addr - func_offset, cur_name.c_str());
}
name = cur_name;
}
}
}
return 0;
}
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