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,
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
37 protected:
38  X86BaseRelativePatcher() { }
39
40  // PC displacement from patch location; the base address of x86/x86-64 relative
41  // calls and x86-64 RIP-relative addressing is the PC of the next instruction and
42  // the patch location is 4 bytes earlier.
43  static constexpr int32_t kPcDisplacement = 4;
44
45 private:
46  DISALLOW_COPY_AND_ASSIGN(X86BaseRelativePatcher);
47};
48
49}  // namespace linker
50}  // namespace art
51
52#endif  // ART_COMPILER_LINKER_X86_RELATIVE_PATCHER_X86_BASE_H_
53