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_X86_RELATIVE_PATCHER_X86_BASE_H_ 18 #define ART_COMPILER_LINKER_X86_RELATIVE_PATCHER_X86_BASE_H_ 19 20 #include "linker/relative_patcher.h" 21 22 namespace art { 23 namespace linker { 24 25 class X86BaseRelativePatcher : public RelativePatcher { 26 public: 27 uint32_t ReserveSpace(uint32_t offset, 28 const CompiledMethod* compiled_method, 29 MethodReference method_ref) OVERRIDE; 30 uint32_t ReserveSpaceEnd(uint32_t offset) OVERRIDE; 31 uint32_t WriteThunks(OutputStream* out, uint32_t offset) OVERRIDE; 32 void PatchCall(std::vector<uint8_t>* code, 33 uint32_t literal_offset, 34 uint32_t patch_offset, 35 uint32_t target_offset) OVERRIDE; 36 std::vector<debug::MethodDebugInfo> GenerateThunkDebugInfo(uint32_t executable_offset) OVERRIDE; 37 38 protected: 39 X86BaseRelativePatcher() { } 40 41 // PC displacement from patch location; the base address of x86/x86-64 relative 42 // calls and x86-64 RIP-relative addressing is the PC of the next instruction and 43 // the patch location is 4 bytes earlier. 44 static constexpr int32_t kPcDisplacement = 4; 45 46 private: 47 DISALLOW_COPY_AND_ASSIGN(X86BaseRelativePatcher); 48 }; 49 50 } // namespace linker 51 } // namespace art 52 53 #endif // ART_COMPILER_LINKER_X86_RELATIVE_PATCHER_X86_BASE_H_ 54
