relative_patcher_x86_base.h revision b163bb742a099c1808907b513ae39068b63b1692 
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
22namespace art {
23namespace linker {
24
25class X86BaseRelativePatcher : public RelativePatcher {
26 public:
27  uint32_t ReserveSpace(uint32_t offset,
28                        const CompiledMethod* compiled_method ATTRIBUTE_UNUSED) OVERRIDE;
29  uint32_t WriteThunks(OutputStream* out ATTRIBUTE_UNUSED, uint32_t offset) OVERRIDE;
30  void PatchCall(std::vector<uint8_t>* code, uint32_t literal_offset,
31                 uint32_t patch_offset, uint32_t target_offset) OVERRIDE;
32
33 protected:
34  X86BaseRelativePatcher() { }
35
36  // PC displacement from patch location; the base address of x86/x86-64 relative
37  // calls and x86-64 RIP-relative addressing is the PC of the next instruction and
38  // the patch location is 4 bytes earlier.
39  static constexpr int32_t kPcDisplacement = 4;
40
41 private:
42  DISALLOW_COPY_AND_ASSIGN(X86BaseRelativePatcher);
43};
44
45}  // namespace linker
46}  // namespace art
47
48#endif  // ART_COMPILER_LINKER_X86_RELATIVE_PATCHER_X86_BASE_H_
49