1 /* 2 * Copyright (C) 2015 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 #ifndef ART_DEX2OAT_LINKER_ARM64_RELATIVE_PATCHER_ARM64_H_ 18 #define ART_DEX2OAT_LINKER_ARM64_RELATIVE_PATCHER_ARM64_H_ 19 20 #include "base/array_ref.h" 21 #include "linker/arm/relative_patcher_arm_base.h" 22 23 namespace art { 24 25 namespace arm64 { 26 class Arm64Assembler; 27 } // namespace arm64 28 29 namespace linker { 30 31 class Arm64RelativePatcher final : public ArmBaseRelativePatcher { 32 public: 33 Arm64RelativePatcher(RelativePatcherThunkProvider* thunk_provider, 34 RelativePatcherTargetProvider* target_provider, 35 const Arm64InstructionSetFeatures* features); 36 37 uint32_t ReserveSpace(uint32_t offset, 38 const CompiledMethod* compiled_method, 39 MethodReference method_ref) override; 40 uint32_t ReserveSpaceEnd(uint32_t offset) override; 41 uint32_t WriteThunks(OutputStream* out, uint32_t offset) override; 42 void PatchCall(std::vector<uint8_t>* code, 43 uint32_t literal_offset, 44 uint32_t patch_offset, 45 uint32_t target_offset) override; 46 void PatchPcRelativeReference(std::vector<uint8_t>* code, 47 const LinkerPatch& patch, 48 uint32_t patch_offset, 49 uint32_t target_offset) override; 50 void PatchEntrypointCall(std::vector<uint8_t>* code, 51 const LinkerPatch& patch, 52 uint32_t patch_offset) override; 53 void PatchBakerReadBarrierBranch(std::vector<uint8_t>* code, 54 const LinkerPatch& patch, 55 uint32_t patch_offset) override; 56 57 protected: 58 uint32_t MaxPositiveDisplacement(const ThunkKey& key) override; 59 uint32_t MaxNegativeDisplacement(const ThunkKey& key) override; 60 61 private: 62 static uint32_t PatchAdrp(uint32_t adrp, uint32_t disp); 63 static void PatchBl(std::vector<uint8_t>* code, uint32_t literal_offset, uint32_t displacement); 64 65 static bool NeedsErratum843419Thunk(ArrayRef<const uint8_t> code, uint32_t literal_offset, 66 uint32_t patch_offset); 67 static void SetInsn(std::vector<uint8_t>* code, uint32_t offset, uint32_t value); 68 static uint32_t GetInsn(ArrayRef<const uint8_t> code, uint32_t offset); 69 70 template <typename Alloc> 71 static uint32_t GetInsn(std::vector<uint8_t, Alloc>* code, uint32_t offset); 72 73 const bool fix_cortex_a53_843419_; 74 // Map original patch_offset to thunk offset. 75 std::vector<std::pair<uint32_t, uint32_t>> adrp_thunk_locations_; 76 size_t reserved_adrp_thunks_; 77 size_t processed_adrp_thunks_; 78 std::vector<uint8_t> current_method_thunks_; 79 80 friend class Arm64RelativePatcherTest; 81 82 DISALLOW_COPY_AND_ASSIGN(Arm64RelativePatcher); 83 }; 84 85 } // namespace linker 86 } // namespace art 87 88 #endif // ART_DEX2OAT_LINKER_ARM64_RELATIVE_PATCHER_ARM64_H_ 89