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_COMPILER_LINKER_ARM_RELATIVE_PATCHER_THUMB2_H_ 18 #define ART_COMPILER_LINKER_ARM_RELATIVE_PATCHER_THUMB2_H_ 19 20 #include "linker/arm/relative_patcher_arm_base.h" 21 22 namespace art { 23 namespace linker { 24 25 class Thumb2RelativePatcher FINAL : public ArmBaseRelativePatcher { 26 public: 27 explicit Thumb2RelativePatcher(RelativePatcherTargetProvider* provider); 28 29 void PatchCall(std::vector<uint8_t>* code, 30 uint32_t literal_offset, 31 uint32_t patch_offset, 32 uint32_t target_offset) OVERRIDE; 33 void PatchPcRelativeReference(std::vector<uint8_t>* code, 34 const LinkerPatch& patch, 35 uint32_t patch_offset, 36 uint32_t target_offset) OVERRIDE; 37 void PatchBakerReadBarrierBranch(std::vector<uint8_t>* code, 38 const LinkerPatch& patch, 39 uint32_t patch_offset) OVERRIDE; 40 41 protected: 42 ThunkKey GetBakerReadBarrierKey(const LinkerPatch& patch) OVERRIDE; 43 std::vector<uint8_t> CompileThunk(const ThunkKey& key) OVERRIDE; 44 uint32_t MaxPositiveDisplacement(ThunkType type) OVERRIDE; 45 uint32_t MaxNegativeDisplacement(ThunkType type) OVERRIDE; 46 47 private: 48 void SetInsn32(std::vector<uint8_t>* code, uint32_t offset, uint32_t value); 49 static uint32_t GetInsn32(ArrayRef<const uint8_t> code, uint32_t offset); 50 51 template <typename Vector> 52 static uint32_t GetInsn32(Vector* code, uint32_t offset); 53 54 friend class Thumb2RelativePatcherTest; 55 56 DISALLOW_COPY_AND_ASSIGN(Thumb2RelativePatcher); 57 }; 58 59 } // namespace linker 60 } // namespace art 61 62 #endif // ART_COMPILER_LINKER_ARM_RELATIVE_PATCHER_THUMB2_H_ 63