relative_patcher_arm64.h revision 71b0ddf988208c9f77e7d2c1e75066cc3fe20c61
1b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko/* 2b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * Copyright (C) 2015 The Android Open Source Project 3b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * 4b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * Licensed under the Apache License, Version 2.0 (the "License"); 5b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * you may not use this file except in compliance with the License. 6b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * You may obtain a copy of the License at 7b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * 8b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * http://www.apache.org/licenses/LICENSE-2.0 9b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * 10b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * Unless required by applicable law or agreed to in writing, software 11b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * distributed under the License is distributed on an "AS IS" BASIS, 12b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * See the License for the specific language governing permissions and 14b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko * limitations under the License. 15b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko */ 16b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 17b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko#ifndef ART_COMPILER_LINKER_ARM64_RELATIVE_PATCHER_ARM64_H_ 18b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko#define ART_COMPILER_LINKER_ARM64_RELATIVE_PATCHER_ARM64_H_ 19b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 20b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko#include "linker/arm/relative_patcher_arm_base.h" 21b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko#include "utils/array_ref.h" 22b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 23b163bb742a099c1808907b513ae39068b63b1692Vladimir Markonamespace art { 24b163bb742a099c1808907b513ae39068b63b1692Vladimir Markonamespace linker { 25b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 26b163bb742a099c1808907b513ae39068b63b1692Vladimir Markoclass Arm64RelativePatcher FINAL : public ArmBaseRelativePatcher { 27b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko public: 28b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko Arm64RelativePatcher(RelativePatcherTargetProvider* provider, 29b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko const Arm64InstructionSetFeatures* features); 30b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 314d23c9d01b7a609813345eec95167a4dbc4fbae4Vladimir Marko uint32_t ReserveSpace(uint32_t offset, const CompiledMethod* compiled_method, 324d23c9d01b7a609813345eec95167a4dbc4fbae4Vladimir Marko MethodReference method_ref) OVERRIDE; 3371b0ddf988208c9f77e7d2c1e75066cc3fe20c61Vladimir Marko uint32_t ReserveSpaceEnd(uint32_t offset) OVERRIDE; 34b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko uint32_t WriteThunks(OutputStream* out, uint32_t offset) OVERRIDE; 35b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko void PatchCall(std::vector<uint8_t>* code, uint32_t literal_offset, 36b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko uint32_t patch_offset, uint32_t target_offset) OVERRIDE; 37b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko void PatchDexCacheReference(std::vector<uint8_t>* code, const LinkerPatch& patch, 38b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko uint32_t patch_offset, uint32_t target_offset) OVERRIDE; 39b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 40b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko private: 41b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko static std::vector<uint8_t> CompileThunkCode(); 42b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko static uint32_t PatchAdrp(uint32_t adrp, uint32_t disp); 43b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 44b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko static bool NeedsErratum843419Thunk(ArrayRef<const uint8_t> code, uint32_t literal_offset, 45b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko uint32_t patch_offset); 46b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko void SetInsn(std::vector<uint8_t>* code, uint32_t offset, uint32_t value); 47b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko static uint32_t GetInsn(ArrayRef<const uint8_t> code, uint32_t offset); 48b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 49b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko template <typename Alloc> 50b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko static uint32_t GetInsn(std::vector<uint8_t, Alloc>* code, uint32_t offset); 51b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 52b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko // Maximum positive and negative displacement measured from the patch location. 53b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko // (Signed 28 bit displacement with the last bit 0 has range [-2^27, 2^27-4] measured from 54b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko // the ARM64 PC pointing to the BL.) 55b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko static constexpr uint32_t kMaxPositiveDisplacement = (1u << 27) - 4u; 56b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko static constexpr uint32_t kMaxNegativeDisplacement = (1u << 27); 57b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 58b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko // The ADRP thunk for erratum 843419 is 2 instructions, i.e. 8 bytes. 59b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko static constexpr uint32_t kAdrpThunkSize = 8u; 60b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 61b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko const bool fix_cortex_a53_843419_; 62b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko // Map original patch_offset to thunk offset. 63b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko std::vector<std::pair<uint32_t, uint32_t>> adrp_thunk_locations_; 64b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko size_t reserved_adrp_thunks_; 65b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko size_t processed_adrp_thunks_; 66b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko std::vector<uint8_t> current_method_thunks_; 67b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 68b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko DISALLOW_COPY_AND_ASSIGN(Arm64RelativePatcher); 69b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko}; 70b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 71b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko} // namespace linker 72b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko} // namespace art 73b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 74b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko#endif // ART_COMPILER_LINKER_ARM64_RELATIVE_PATCHER_ARM64_H_ 75