Christopher Ferris | 3958f80 | 2017-02-01 15:44:40 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <elf.h> |
| 18 | #include <errno.h> |
| 19 | #include <fcntl.h> |
| 20 | #include <inttypes.h> |
| 21 | #include <stdio.h> |
| 22 | #include <string.h> |
| 23 | #include <sys/mman.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <sys/stat.h> |
| 26 | #include <unistd.h> |
| 27 | |
| 28 | #include "ArmExidx.h" |
| 29 | #include "Elf.h" |
| 30 | #include "ElfInterface.h" |
| 31 | #include "ElfInterfaceArm.h" |
| 32 | #include "Log.h" |
| 33 | |
| 34 | void DumpArm(ElfInterfaceArm* interface) { |
| 35 | if (interface == nullptr) { |
| 36 | printf("No ARM Unwind Information.\n\n"); |
| 37 | return; |
| 38 | } |
| 39 | |
| 40 | printf("ARM Unwind Information:\n"); |
| 41 | for (const auto& entry : interface->pt_loads()) { |
| 42 | uint64_t load_bias = entry.second.table_offset; |
| 43 | printf(" PC Range 0x%" PRIx64 " - 0x%" PRIx64 "\n", entry.second.offset + load_bias, |
| 44 | entry.second.table_size + load_bias); |
| 45 | for (auto addr : *interface) { |
| 46 | std::string name; |
| 47 | printf(" PC 0x%" PRIx64, addr + load_bias); |
| 48 | uint64_t func_offset; |
| 49 | if (interface->GetFunctionName(addr + load_bias + 1, &name, &func_offset) && !name.empty()) { |
| 50 | printf(" <%s>", name.c_str()); |
| 51 | } |
| 52 | printf("\n"); |
| 53 | uint64_t entry; |
| 54 | if (!interface->FindEntry(addr + load_bias, &entry)) { |
| 55 | printf(" Cannot find entry for address.\n"); |
| 56 | continue; |
| 57 | } |
| 58 | ArmExidx arm(nullptr, interface->memory(), nullptr); |
| 59 | arm.set_log(true); |
| 60 | arm.set_log_skip_execution(true); |
| 61 | arm.set_log_indent(2); |
| 62 | if (!arm.ExtractEntryData(entry)) { |
| 63 | if (arm.status() != ARM_STATUS_NO_UNWIND) { |
| 64 | printf(" Error trying to extract data.\n"); |
| 65 | } |
| 66 | continue; |
| 67 | } |
| 68 | if (arm.data()->size() > 0) { |
| 69 | if (!arm.Eval() && arm.status() != ARM_STATUS_NO_UNWIND) { |
| 70 | printf(" Error trying to evaluate dwarf data.\n"); |
| 71 | } |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | printf("\n"); |
| 76 | } |
| 77 | |
| 78 | int main(int argc, char** argv) { |
| 79 | if (argc != 2) { |
| 80 | printf("Need to pass the name of an elf file to the program.\n"); |
| 81 | return 1; |
| 82 | } |
| 83 | |
| 84 | struct stat st; |
| 85 | if (stat(argv[1], &st) == -1) { |
| 86 | printf("Cannot stat %s: %s\n", argv[1], strerror(errno)); |
| 87 | return 1; |
| 88 | } |
| 89 | if (!S_ISREG(st.st_mode)) { |
| 90 | printf("%s is not a regular file.\n", argv[1]); |
| 91 | return 1; |
| 92 | } |
| 93 | if (S_ISDIR(st.st_mode)) { |
| 94 | printf("%s is a directory.\n", argv[1]); |
| 95 | return 1; |
| 96 | } |
| 97 | |
| 98 | // Send all log messages to stdout. |
| 99 | log_to_stdout(true); |
| 100 | |
| 101 | MemoryFileAtOffset* memory = new MemoryFileAtOffset; |
| 102 | if (!memory->Init(argv[1], 0)) { |
| 103 | // Initializatation failed. |
| 104 | printf("Failed to init\n"); |
| 105 | return 1; |
| 106 | } |
| 107 | |
| 108 | Elf elf(memory); |
| 109 | if (!elf.Init() || !elf.valid()) { |
| 110 | printf("%s is not a valid elf file.\n", argv[1]); |
| 111 | return 1; |
| 112 | } |
| 113 | |
| 114 | ElfInterface* interface = elf.interface(); |
| 115 | if (elf.machine_type() == EM_ARM) { |
| 116 | DumpArm(reinterpret_cast<ElfInterfaceArm*>(interface)); |
| 117 | printf("\n"); |
| 118 | } |
| 119 | |
| 120 | return 0; |
| 121 | } |