relative_patcher_x86_base.h revision 4d23c9d01b7a609813345eec95167a4dbc4fbae4
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_X86_RELATIVE_PATCHER_X86_BASE_H_ 18b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko#define ART_COMPILER_LINKER_X86_RELATIVE_PATCHER_X86_BASE_H_ 19b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 20b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko#include "linker/relative_patcher.h" 21b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 22b163bb742a099c1808907b513ae39068b63b1692Vladimir Markonamespace art { 23b163bb742a099c1808907b513ae39068b63b1692Vladimir Markonamespace linker { 24b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 25b163bb742a099c1808907b513ae39068b63b1692Vladimir Markoclass X86BaseRelativePatcher : public RelativePatcher { 26b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko public: 27b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko uint32_t ReserveSpace(uint32_t offset, 284d23c9d01b7a609813345eec95167a4dbc4fbae4Vladimir Marko const CompiledMethod* compiled_method, 294d23c9d01b7a609813345eec95167a4dbc4fbae4Vladimir Marko MethodReference method_ref) OVERRIDE; 304d23c9d01b7a609813345eec95167a4dbc4fbae4Vladimir Marko uint32_t WriteThunks(OutputStream* out, uint32_t offset) OVERRIDE; 31b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko void PatchCall(std::vector<uint8_t>* code, uint32_t literal_offset, 32b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko uint32_t patch_offset, uint32_t target_offset) OVERRIDE; 33b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 34b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko protected: 35b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko X86BaseRelativePatcher() { } 36b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 37b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko // PC displacement from patch location; the base address of x86/x86-64 relative 38b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko // calls and x86-64 RIP-relative addressing is the PC of the next instruction and 39b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko // the patch location is 4 bytes earlier. 40b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko static constexpr int32_t kPcDisplacement = 4; 41b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 42b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko private: 43b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko DISALLOW_COPY_AND_ASSIGN(X86BaseRelativePatcher); 44b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko}; 45b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 46b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko} // namespace linker 47b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko} // namespace art 48b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko 49b163bb742a099c1808907b513ae39068b63b1692Vladimir Marko#endif // ART_COMPILER_LINKER_X86_RELATIVE_PATCHER_X86_BASE_H_ 50