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 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 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 47 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 52 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 57 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 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
