Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 | |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 17 | #include "elf_file.h" |
| 18 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 19 | #include "base/stringprintf.h" |
Ian Rogers | d4c4d95 | 2014-10-16 20:31:53 -0700 | [diff] [blame] | 20 | #include "base/unix_file/fd_file.h" |
Brian Carlstrom | a1ce1fe | 2014-02-24 23:23:58 -0800 | [diff] [blame] | 21 | #include "common_compiler_test.h" |
David Srbecky | 2f6cdb0 | 2015-04-11 00:17:53 +0100 | [diff] [blame] | 22 | #include "elf_file.h" |
| 23 | #include "elf_file_impl.h" |
| 24 | #include "elf_writer_quick.h" |
Brian Carlstrom | a1ce1fe | 2014-02-24 23:23:58 -0800 | [diff] [blame] | 25 | #include "oat.h" |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 26 | #include "utils.h" |
Brian Carlstrom | a1ce1fe | 2014-02-24 23:23:58 -0800 | [diff] [blame] | 27 | |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 28 | namespace art { |
| 29 | |
Brian Carlstrom | a1ce1fe | 2014-02-24 23:23:58 -0800 | [diff] [blame] | 30 | class ElfWriterTest : public CommonCompilerTest { |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 31 | protected: |
| 32 | virtual void SetUp() { |
| 33 | ReserveImageSpace(); |
Brian Carlstrom | a1ce1fe | 2014-02-24 23:23:58 -0800 | [diff] [blame] | 34 | CommonCompilerTest::SetUp(); |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 35 | } |
| 36 | }; |
| 37 | |
Brian Carlstrom | 31050c6 | 2013-12-15 12:36:09 -0800 | [diff] [blame] | 38 | #define EXPECT_ELF_FILE_ADDRESS(ef, expected_value, symbol_name, build_map) \ |
| 39 | do { \ |
Nicolas Geoffray | 50cfe74 | 2014-02-19 13:27:42 +0000 | [diff] [blame] | 40 | void* addr = reinterpret_cast<void*>(ef->FindSymbolAddress(SHT_DYNSYM, \ |
Brian Carlstrom | 31050c6 | 2013-12-15 12:36:09 -0800 | [diff] [blame] | 41 | symbol_name, \ |
| 42 | build_map)); \ |
| 43 | EXPECT_NE(nullptr, addr); \ |
| 44 | EXPECT_LT(static_cast<uintptr_t>(ART_BASE_ADDRESS), reinterpret_cast<uintptr_t>(addr)); \ |
| 45 | if (expected_value == nullptr) { \ |
| 46 | expected_value = addr; \ |
| 47 | } \ |
| 48 | EXPECT_EQ(expected_value, addr); \ |
| 49 | EXPECT_EQ(expected_value, ef->FindDynamicSymbolAddress(symbol_name)); \ |
| 50 | } while (false) |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 51 | |
Brian Carlstrom | 6a47b9d | 2013-05-17 10:58:25 -0700 | [diff] [blame] | 52 | TEST_F(ElfWriterTest, dlsym) { |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 53 | std::string elf_location = GetCoreOatLocation(); |
Brian Carlstrom | 2afe494 | 2014-05-19 10:25:33 -0700 | [diff] [blame] | 54 | std::string elf_filename = GetSystemImageFilename(elf_location.c_str(), kRuntimeISA); |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 55 | LOG(INFO) << "elf_filename=" << elf_filename; |
| 56 | |
| 57 | UnreserveImageSpace(); |
Mathieu Chartier | 2cebb24 | 2015-04-21 16:50:40 -0700 | [diff] [blame] | 58 | void* dl_oatdata = nullptr; |
| 59 | void* dl_oatexec = nullptr; |
| 60 | void* dl_oatlastword = nullptr; |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 61 | |
Ian Rogers | 700a402 | 2014-05-19 16:49:03 -0700 | [diff] [blame] | 62 | std::unique_ptr<File> file(OS::OpenFileForReading(elf_filename.c_str())); |
Mathieu Chartier | 2cebb24 | 2015-04-21 16:50:40 -0700 | [diff] [blame] | 63 | ASSERT_TRUE(file.get() != nullptr); |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 64 | { |
Ian Rogers | 8d31bbd | 2013-10-13 10:44:14 -0700 | [diff] [blame] | 65 | std::string error_msg; |
Ian Rogers | 700a402 | 2014-05-19 16:49:03 -0700 | [diff] [blame] | 66 | std::unique_ptr<ElfFile> ef(ElfFile::Open(file.get(), false, false, &error_msg)); |
Ian Rogers | 8d31bbd | 2013-10-13 10:44:14 -0700 | [diff] [blame] | 67 | CHECK(ef.get() != nullptr) << error_msg; |
Brian Carlstrom | 265091e | 2013-01-30 14:08:26 -0800 | [diff] [blame] | 68 | EXPECT_ELF_FILE_ADDRESS(ef, dl_oatdata, "oatdata", false); |
| 69 | EXPECT_ELF_FILE_ADDRESS(ef, dl_oatexec, "oatexec", false); |
| 70 | EXPECT_ELF_FILE_ADDRESS(ef, dl_oatlastword, "oatlastword", false); |
| 71 | } |
| 72 | { |
Ian Rogers | 8d31bbd | 2013-10-13 10:44:14 -0700 | [diff] [blame] | 73 | std::string error_msg; |
Ian Rogers | 700a402 | 2014-05-19 16:49:03 -0700 | [diff] [blame] | 74 | std::unique_ptr<ElfFile> ef(ElfFile::Open(file.get(), false, false, &error_msg)); |
Ian Rogers | 8d31bbd | 2013-10-13 10:44:14 -0700 | [diff] [blame] | 75 | CHECK(ef.get() != nullptr) << error_msg; |
Brian Carlstrom | 265091e | 2013-01-30 14:08:26 -0800 | [diff] [blame] | 76 | EXPECT_ELF_FILE_ADDRESS(ef, dl_oatdata, "oatdata", true); |
| 77 | EXPECT_ELF_FILE_ADDRESS(ef, dl_oatexec, "oatexec", true); |
| 78 | EXPECT_ELF_FILE_ADDRESS(ef, dl_oatlastword, "oatlastword", true); |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 79 | } |
| 80 | { |
Ian Rogers | 8d31bbd | 2013-10-13 10:44:14 -0700 | [diff] [blame] | 81 | std::string error_msg; |
Ian Rogers | 700a402 | 2014-05-19 16:49:03 -0700 | [diff] [blame] | 82 | std::unique_ptr<ElfFile> ef(ElfFile::Open(file.get(), false, true, &error_msg)); |
Ian Rogers | 8d31bbd | 2013-10-13 10:44:14 -0700 | [diff] [blame] | 83 | CHECK(ef.get() != nullptr) << error_msg; |
| 84 | CHECK(ef->Load(false, &error_msg)) << error_msg; |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 85 | EXPECT_EQ(dl_oatdata, ef->FindDynamicSymbolAddress("oatdata")); |
| 86 | EXPECT_EQ(dl_oatexec, ef->FindDynamicSymbolAddress("oatexec")); |
| 87 | EXPECT_EQ(dl_oatlastword, ef->FindDynamicSymbolAddress("oatlastword")); |
| 88 | } |
| 89 | } |
| 90 | |
David Srbecky | 2f6cdb0 | 2015-04-11 00:17:53 +0100 | [diff] [blame] | 91 | // Run only on host since we do unaligned memory accesses. |
| 92 | #ifndef HAVE_ANDROID_OS |
| 93 | |
| 94 | static void PatchSection(const std::vector<uintptr_t>& patch_locations, |
| 95 | std::vector<uint8_t>* section, int32_t delta) { |
| 96 | for (uintptr_t location : patch_locations) { |
| 97 | *reinterpret_cast<int32_t*>(section->data() + location) += delta; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | TEST_F(ElfWriterTest, EncodeDecodeOatPatches) { |
| 102 | std::vector<uint8_t> oat_patches; // Encoded patches. |
| 103 | |
| 104 | // Encode patch locations for a few sections. |
| 105 | OatWriter::PatchLocationsMap sections; |
| 106 | std::vector<uintptr_t> patches0 { 0, 4, 8, 15, 128, 200 }; // NOLINT |
| 107 | sections.emplace(".section0", std::unique_ptr<std::vector<uintptr_t>>( |
| 108 | new std::vector<uintptr_t> { patches0 })); |
| 109 | std::vector<uintptr_t> patches1 { 8, 127 }; // NOLINT |
| 110 | sections.emplace(".section1", std::unique_ptr<std::vector<uintptr_t>>( |
| 111 | new std::vector<uintptr_t> { patches1 })); |
| 112 | std::vector<uintptr_t> patches2 { }; // NOLINT |
| 113 | sections.emplace(".section2", std::unique_ptr<std::vector<uintptr_t>>( |
| 114 | new std::vector<uintptr_t> { patches2 })); |
| 115 | ElfWriterQuick32::EncodeOatPatches(sections, &oat_patches); |
| 116 | |
| 117 | // Create buffers to be patched. |
| 118 | std::vector<uint8_t> initial_data(256); |
| 119 | for (size_t i = 0; i < initial_data.size(); i++) { |
| 120 | initial_data[i] = i; |
| 121 | } |
| 122 | std::vector<uint8_t> section0_expected = initial_data; |
| 123 | std::vector<uint8_t> section1_expected = initial_data; |
| 124 | std::vector<uint8_t> section2_expected = initial_data; |
| 125 | std::vector<uint8_t> section0_actual = initial_data; |
| 126 | std::vector<uint8_t> section1_actual = initial_data; |
| 127 | std::vector<uint8_t> section2_actual = initial_data; |
| 128 | |
| 129 | // Patch manually. |
| 130 | constexpr int32_t delta = 0x11235813; |
| 131 | PatchSection(patches0, §ion0_expected, delta); |
| 132 | PatchSection(patches1, §ion1_expected, delta); |
| 133 | PatchSection(patches2, §ion2_expected, delta); |
| 134 | |
| 135 | // Decode and apply patch locations. |
| 136 | bool section0_successful = ElfFileImpl32::ApplyOatPatches( |
| 137 | oat_patches.data(), oat_patches.data() + oat_patches.size(), |
| 138 | ".section0", delta, |
| 139 | section0_actual.data(), section0_actual.data() + section0_actual.size()); |
| 140 | EXPECT_TRUE(section0_successful); |
| 141 | EXPECT_EQ(section0_expected, section0_actual); |
| 142 | |
| 143 | bool section1_successful = ElfFileImpl32::ApplyOatPatches( |
| 144 | oat_patches.data(), oat_patches.data() + oat_patches.size(), |
| 145 | ".section1", delta, |
| 146 | section1_actual.data(), section1_actual.data() + section1_actual.size()); |
| 147 | EXPECT_TRUE(section1_successful); |
| 148 | EXPECT_EQ(section1_expected, section1_actual); |
| 149 | |
| 150 | bool section2_successful = ElfFileImpl32::ApplyOatPatches( |
| 151 | oat_patches.data(), oat_patches.data() + oat_patches.size(), |
| 152 | ".section2", delta, |
| 153 | section2_actual.data(), section2_actual.data() + section2_actual.size()); |
| 154 | EXPECT_TRUE(section2_successful); |
| 155 | EXPECT_EQ(section2_expected, section2_actual); |
| 156 | } |
| 157 | |
| 158 | #endif |
| 159 | |
Brian Carlstrom | 700c8d3 | 2012-11-05 10:42:02 -0800 | [diff] [blame] | 160 | } // namespace art |