1 /*
2  * Copyright (C) 2023 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_DEX2OAT_LINKER_RISCV64_RELATIVE_PATCHER_RISCV64_H_
18 #define ART_DEX2OAT_LINKER_RISCV64_RELATIVE_PATCHER_RISCV64_H_
19 
20 #include "base/array_ref.h"
21 #include "linker/relative_patcher.h"
22 
23 namespace art {
24 
25 namespace linker {
26 
27 class Riscv64RelativePatcher final : public RelativePatcher {
28  public:
29   Riscv64RelativePatcher(RelativePatcherThunkProvider* thunk_provider,
30                          RelativePatcherTargetProvider* target_provider,
31                          const Riscv64InstructionSetFeatures* features);
32 
33   uint32_t ReserveSpace(uint32_t offset,
34                         const CompiledMethod* compiled_method,
35                         MethodReference method_ref) override;
36   uint32_t ReserveSpaceEnd(uint32_t offset) override;
37   uint32_t WriteThunks(OutputStream* out, uint32_t offset) override;
38   void PatchCall(std::vector<uint8_t>* code,
39                  uint32_t literal_offset,
40                  uint32_t patch_offset,
41                  uint32_t target_offset) override;
42   void PatchPcRelativeReference(std::vector<uint8_t>* code,
43                                 const LinkerPatch& patch,
44                                 uint32_t patch_offset,
45                                 uint32_t target_offset) override;
46   void PatchEntrypointCall(std::vector<uint8_t>* code,
47                            const LinkerPatch& patch,
48                            uint32_t patch_offset) override;
49   void PatchBakerReadBarrierBranch(std::vector<uint8_t>* code,
50                                    const LinkerPatch& patch,
51                                    uint32_t patch_offset) override;
52   std::vector<debug::MethodDebugInfo> GenerateThunkDebugInfo(
53       uint32_t executable_offset) override;
54 
55  private:
56   static uint32_t PatchAuipc(uint32_t auipc, int32_t offset);
57 
58   static void SetInsn(std::vector<uint8_t>* code, uint32_t offset, uint32_t value);
59   static uint32_t GetInsn(ArrayRef<const uint8_t> code, uint32_t offset);
60   template <typename Alloc>
61   uint32_t GetInsn(std::vector<uint8_t, Alloc>* code, uint32_t offset);
62 
63   DISALLOW_COPY_AND_ASSIGN(Riscv64RelativePatcher);
64 };
65 
66 }  // namespace linker
67 }  // namespace art
68 
69 #endif  // ART_DEX2OAT_LINKER_RISCV64_RELATIVE_PATCHER_RISCV64_H_
70