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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _LIBUNWINDSTACK_DWARF_MEMORY_H
#define _LIBUNWINDSTACK_DWARF_MEMORY_H
#include <stdint.h>
namespace unwindstack {
// Forward declarations.
class Memory;
class DwarfMemory {
public:
DwarfMemory(Memory* memory) : memory_(memory) {}
virtual ~DwarfMemory() = default;
bool ReadBytes(void* dst, size_t num_bytes);
template <typename SignedType>
bool ReadSigned(uint64_t* value);
bool ReadULEB128(uint64_t* value);
bool ReadSLEB128(int64_t* value);
template <typename AddressType>
size_t GetEncodedSize(uint8_t encoding);
bool AdjustEncodedValue(uint8_t encoding, uint64_t* value);
template <typename AddressType>
bool ReadEncodedValue(uint8_t encoding, uint64_t* value);
uint64_t cur_offset() { return cur_offset_; }
void set_cur_offset(uint64_t cur_offset) { cur_offset_ = cur_offset; }
void set_pc_offset(uint64_t offset) { pc_offset_ = offset; }
void clear_pc_offset() { pc_offset_ = static_cast<uint64_t>(-1); }
void set_data_offset(uint64_t offset) { data_offset_ = offset; }
void clear_data_offset() { data_offset_ = static_cast<uint64_t>(-1); }
void set_func_offset(uint64_t offset) { func_offset_ = offset; }
void clear_func_offset() { func_offset_ = static_cast<uint64_t>(-1); }
void set_text_offset(uint64_t offset) { text_offset_ = offset; }
void clear_text_offset() { text_offset_ = static_cast<uint64_t>(-1); }
private:
Memory* memory_;
uint64_t cur_offset_ = 0;
uint64_t pc_offset_ = static_cast<uint64_t>(-1);
uint64_t data_offset_ = static_cast<uint64_t>(-1);
uint64_t func_offset_ = static_cast<uint64_t>(-1);
uint64_t text_offset_ = static_cast<uint64_t>(-1);
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_DWARF_MEMORY_H
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