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 #ifndef _LIBUNWINDSTACK_DWARF_MEMORY_H 18 #define _LIBUNWINDSTACK_DWARF_MEMORY_H 19 20 #include <stdint.h> 21 22 namespace unwindstack { 23 24 // Forward declarations. 25 class Memory; 26 27 class DwarfMemory { 28 public: 29 DwarfMemory(Memory* memory) : memory_(memory) {} 30 virtual ~DwarfMemory() = default; 31 32 bool ReadBytes(void* dst, size_t num_bytes); 33 34 template <typename SignedType> 35 bool ReadSigned(uint64_t* value); 36 37 bool ReadULEB128(uint64_t* value); 38 39 bool ReadSLEB128(int64_t* value); 40 41 template <typename AddressType> 42 size_t GetEncodedSize(uint8_t encoding); 43 44 bool AdjustEncodedValue(uint8_t encoding, uint64_t* value); 45 46 template <typename AddressType> 47 bool ReadEncodedValue(uint8_t encoding, uint64_t* value); 48 49 uint64_t cur_offset() { return cur_offset_; } 50 void set_cur_offset(uint64_t cur_offset) { cur_offset_ = cur_offset; } 51 52 void set_pc_offset(uint64_t offset) { pc_offset_ = offset; } 53 void clear_pc_offset() { pc_offset_ = static_cast<uint64_t>(-1); } 54 55 void set_data_offset(uint64_t offset) { data_offset_ = offset; } 56 void clear_data_offset() { data_offset_ = static_cast<uint64_t>(-1); } 57 58 void set_func_offset(uint64_t offset) { func_offset_ = offset; } 59 void clear_func_offset() { func_offset_ = static_cast<uint64_t>(-1); } 60 61 void set_text_offset(uint64_t offset) { text_offset_ = offset; } 62 void clear_text_offset() { text_offset_ = static_cast<uint64_t>(-1); } 63 64 private: 65 Memory* memory_; 66 uint64_t cur_offset_ = 0; 67 68 uint64_t pc_offset_ = static_cast<uint64_t>(-1); 69 uint64_t data_offset_ = static_cast<uint64_t>(-1); 70 uint64_t func_offset_ = static_cast<uint64_t>(-1); 71 uint64_t text_offset_ = static_cast<uint64_t>(-1); 72 }; 73 74 } // namespace unwindstack 75 76 #endif // _LIBUNWINDSTACK_DWARF_MEMORY_H 77
