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 #pragma once 18 19 #include <stdint.h> 20 21 namespace unwindstack { 22 23 // Forward declarations. 24 class Memory; 25 26 class DwarfMemory { 27 public: DwarfMemory(Memory * memory)28 DwarfMemory(Memory* memory) : memory_(memory) {} 29 virtual ~DwarfMemory() = default; 30 31 bool ReadBytes(void* dst, size_t num_bytes); 32 33 template <typename SignedType> 34 bool ReadSigned(uint64_t* value); 35 36 bool ReadULEB128(uint64_t* value); 37 38 bool ReadSLEB128(int64_t* value); 39 40 template <typename AddressType> 41 size_t GetEncodedSize(uint8_t encoding); 42 43 bool AdjustEncodedValue(uint8_t encoding, uint64_t* value); 44 45 template <typename AddressType> 46 bool ReadEncodedValue(uint8_t encoding, uint64_t* value); 47 cur_offset()48 uint64_t cur_offset() { return cur_offset_; } set_cur_offset(uint64_t cur_offset)49 void set_cur_offset(uint64_t cur_offset) { cur_offset_ = cur_offset; } 50 set_pc_offset(int64_t offset)51 void set_pc_offset(int64_t offset) { pc_offset_ = offset; } clear_pc_offset()52 void clear_pc_offset() { pc_offset_ = INT64_MAX; } 53 set_data_offset(uint64_t offset)54 void set_data_offset(uint64_t offset) { data_offset_ = offset; } clear_data_offset()55 void clear_data_offset() { data_offset_ = static_cast<uint64_t>(-1); } 56 set_func_offset(uint64_t offset)57 void set_func_offset(uint64_t offset) { func_offset_ = offset; } clear_func_offset()58 void clear_func_offset() { func_offset_ = static_cast<uint64_t>(-1); } 59 set_text_offset(uint64_t offset)60 void set_text_offset(uint64_t offset) { text_offset_ = offset; } clear_text_offset()61 void clear_text_offset() { text_offset_ = static_cast<uint64_t>(-1); } 62 63 private: 64 Memory* memory_; 65 uint64_t cur_offset_ = 0; 66 67 int64_t pc_offset_ = INT64_MAX; 68 uint64_t data_offset_ = static_cast<uint64_t>(-1); 69 uint64_t func_offset_ = static_cast<uint64_t>(-1); 70 uint64_t text_offset_ = static_cast<uint64_t>(-1); 71 }; 72 73 } // namespace unwindstack 74