1 /*
2 * Copyright (C) 2016 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 #include "multi_oat_relative_patcher.h"
18
19 #include "globals.h"
20 #include "base/bit_utils.h"
21 #include "base/logging.h"
22
23 namespace art {
24 namespace linker {
25
MultiOatRelativePatcher(InstructionSet instruction_set,const InstructionSetFeatures * features)26 MultiOatRelativePatcher::MultiOatRelativePatcher(InstructionSet instruction_set,
27 const InstructionSetFeatures* features)
28 : method_offset_map_(),
29 relative_patcher_(
30 linker::RelativePatcher::Create(instruction_set, features, &method_offset_map_)),
31 adjustment_(0u),
32 instruction_set_(instruction_set),
33 start_size_code_alignment_(0u),
34 start_size_relative_call_thunks_(0u),
35 start_size_misc_thunks_(0u) {
36 }
37
StartOatFile(uint32_t adjustment)38 void MultiOatRelativePatcher::StartOatFile(uint32_t adjustment) {
39 DCHECK_ALIGNED(adjustment, kPageSize);
40 adjustment_ = adjustment;
41
42 start_size_code_alignment_ = relative_patcher_->CodeAlignmentSize();
43 start_size_relative_call_thunks_ = relative_patcher_->RelativeCallThunksSize();
44 start_size_misc_thunks_ = relative_patcher_->MiscThunksSize();
45 }
46
CodeAlignmentSize() const47 uint32_t MultiOatRelativePatcher::CodeAlignmentSize() const {
48 DCHECK_GE(relative_patcher_->CodeAlignmentSize(), start_size_code_alignment_);
49 return relative_patcher_->CodeAlignmentSize() - start_size_code_alignment_;
50 }
51
RelativeCallThunksSize() const52 uint32_t MultiOatRelativePatcher::RelativeCallThunksSize() const {
53 DCHECK_GE(relative_patcher_->RelativeCallThunksSize(), start_size_relative_call_thunks_);
54 return relative_patcher_->RelativeCallThunksSize() - start_size_relative_call_thunks_;
55 }
56
MiscThunksSize() const57 uint32_t MultiOatRelativePatcher::MiscThunksSize() const {
58 DCHECK_GE(relative_patcher_->MiscThunksSize(), start_size_misc_thunks_);
59 return relative_patcher_->MiscThunksSize() - start_size_misc_thunks_;
60 }
61
FindMethodOffset(MethodReference ref)62 std::pair<bool, uint32_t> MultiOatRelativePatcher::MethodOffsetMap::FindMethodOffset(
63 MethodReference ref) {
64 auto it = map.find(ref);
65 if (it == map.end()) {
66 return std::pair<bool, uint32_t>(false, 0u);
67 } else {
68 return std::pair<bool, uint32_t>(true, it->second);
69 }
70 }
71 } // namespace linker
72 } // namespace art
73