Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -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 "linker/relative_patcher_test.h" |
| 18 | #include "linker/mips64/relative_patcher_mips64.h" |
| 19 | |
| 20 | namespace art { |
| 21 | namespace linker { |
| 22 | |
| 23 | class Mips64RelativePatcherTest : public RelativePatcherTest { |
| 24 | public: |
| 25 | Mips64RelativePatcherTest() : RelativePatcherTest(kMips64, "default") {} |
| 26 | |
| 27 | protected: |
| 28 | static const uint8_t kUnpatchedPcRelativeRawCode[]; |
| 29 | static const uint8_t kUnpatchedPcRelativeCallRawCode[]; |
Alexey Frunze | 5fa5c04 | 2017-06-01 21:07:52 -0700 | [diff] [blame] | 30 | static const uint32_t kLiteralOffsetHigh; |
| 31 | static const uint32_t kLiteralOffsetLow1; |
| 32 | static const uint32_t kLiteralOffsetLow2; |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 33 | static const uint32_t kAnchorOffset; |
| 34 | static const ArrayRef<const uint8_t> kUnpatchedPcRelativeCode; |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 35 | |
| 36 | uint32_t GetMethodOffset(uint32_t method_idx) { |
| 37 | auto result = method_offset_map_.FindMethodOffset(MethodRef(method_idx)); |
| 38 | CHECK(result.first); |
| 39 | return result.second; |
| 40 | } |
| 41 | |
| 42 | void CheckPcRelativePatch(const ArrayRef<const LinkerPatch>& patches, uint32_t target_offset); |
Vladimir Marko | 5f07820 | 2017-05-18 13:32:53 +0100 | [diff] [blame] | 43 | void TestStringBssEntry(uint32_t bss_begin, uint32_t string_entry_offset); |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 44 | void TestStringReference(uint32_t string_offset); |
| 45 | }; |
| 46 | |
| 47 | const uint8_t Mips64RelativePatcherTest::kUnpatchedPcRelativeRawCode[] = { |
Alexey Frunze | 5fa5c04 | 2017-06-01 21:07:52 -0700 | [diff] [blame] | 48 | 0x34, 0x12, 0x5E, 0xEE, // auipc s2, high(diff); placeholder = 0x1234 |
Alexey Frunze | f63f569 | 2016-12-13 17:43:11 -0800 | [diff] [blame] | 49 | 0x78, 0x56, 0x52, 0x66, // daddiu s2, s2, low(diff); placeholder = 0x5678 |
Alexey Frunze | 5fa5c04 | 2017-06-01 21:07:52 -0700 | [diff] [blame] | 50 | 0x78, 0x56, 0x52, 0x9E, // lwu s2, (low(diff))(s2) ; placeholder = 0x5678 |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 51 | }; |
Alexey Frunze | 5fa5c04 | 2017-06-01 21:07:52 -0700 | [diff] [blame] | 52 | const uint32_t Mips64RelativePatcherTest::kLiteralOffsetHigh = 0; // At auipc. |
| 53 | const uint32_t Mips64RelativePatcherTest::kLiteralOffsetLow1 = 4; // At daddiu. |
| 54 | const uint32_t Mips64RelativePatcherTest::kLiteralOffsetLow2 = 8; // At lwu. |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 55 | const uint32_t Mips64RelativePatcherTest::kAnchorOffset = 0; // At auipc (where PC+0 points). |
| 56 | const ArrayRef<const uint8_t> Mips64RelativePatcherTest::kUnpatchedPcRelativeCode( |
| 57 | kUnpatchedPcRelativeRawCode); |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 58 | |
| 59 | void Mips64RelativePatcherTest::CheckPcRelativePatch(const ArrayRef<const LinkerPatch>& patches, |
| 60 | uint32_t target_offset) { |
| 61 | AddCompiledMethod(MethodRef(1u), kUnpatchedPcRelativeCode, ArrayRef<const LinkerPatch>(patches)); |
| 62 | Link(); |
| 63 | |
| 64 | auto result = method_offset_map_.FindMethodOffset(MethodRef(1u)); |
| 65 | ASSERT_TRUE(result.first); |
| 66 | |
| 67 | uint32_t diff = target_offset - (result.second + kAnchorOffset); |
Alexey Frunze | 5fa5c04 | 2017-06-01 21:07:52 -0700 | [diff] [blame] | 68 | diff += (diff & 0x8000) << 1; // Account for sign extension in daddiu/lwu. |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 69 | |
| 70 | const uint8_t expected_code[] = { |
| 71 | static_cast<uint8_t>(diff >> 16), static_cast<uint8_t>(diff >> 24), 0x5E, 0xEE, |
Alexey Frunze | f63f569 | 2016-12-13 17:43:11 -0800 | [diff] [blame] | 72 | static_cast<uint8_t>(diff), static_cast<uint8_t>(diff >> 8), 0x52, 0x66, |
Alexey Frunze | 5fa5c04 | 2017-06-01 21:07:52 -0700 | [diff] [blame] | 73 | static_cast<uint8_t>(diff), static_cast<uint8_t>(diff >> 8), 0x52, 0x9E, |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 74 | }; |
| 75 | EXPECT_TRUE(CheckLinkedMethod(MethodRef(1u), ArrayRef<const uint8_t>(expected_code))); |
| 76 | } |
| 77 | |
Vladimir Marko | 5f07820 | 2017-05-18 13:32:53 +0100 | [diff] [blame] | 78 | void Mips64RelativePatcherTest::TestStringBssEntry(uint32_t bss_begin, |
| 79 | uint32_t string_entry_offset) { |
| 80 | constexpr uint32_t kStringIndex = 1u; |
| 81 | string_index_to_offset_map_.Put(kStringIndex, string_entry_offset); |
| 82 | bss_begin_ = bss_begin; |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 83 | LinkerPatch patches[] = { |
Alexey Frunze | 5fa5c04 | 2017-06-01 21:07:52 -0700 | [diff] [blame] | 84 | LinkerPatch::StringBssEntryPatch(kLiteralOffsetHigh, nullptr, kAnchorOffset, kStringIndex), |
| 85 | LinkerPatch::StringBssEntryPatch(kLiteralOffsetLow1, nullptr, kAnchorOffset, kStringIndex), |
| 86 | LinkerPatch::StringBssEntryPatch(kLiteralOffsetLow2, nullptr, kAnchorOffset, kStringIndex) |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 87 | }; |
Vladimir Marko | 5f07820 | 2017-05-18 13:32:53 +0100 | [diff] [blame] | 88 | CheckPcRelativePatch(ArrayRef<const LinkerPatch>(patches), bss_begin_ + string_entry_offset); |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 89 | } |
| 90 | |
Vladimir Marko | 5f07820 | 2017-05-18 13:32:53 +0100 | [diff] [blame] | 91 | TEST_F(Mips64RelativePatcherTest, StringBssEntry) { |
| 92 | TestStringBssEntry(/* bss_begin */ 0x12345678, /* string_entry_offset */ 0x1234); |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 93 | } |
| 94 | |
Alexey Frunze | 19f6c69 | 2016-11-30 19:19:55 -0800 | [diff] [blame] | 95 | } // namespace linker |
| 96 | } // namespace art |