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/*
* Copyright (C) 2017 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_DEBUG_FRAME_H
#define _LIBUNWINDSTACK_DWARF_DEBUG_FRAME_H
#include <stdint.h>
#include <vector>
#include <unwindstack/DwarfSection.h>
namespace unwindstack {
template <typename AddressType>
class DwarfDebugFrame : public DwarfSectionImpl<AddressType> {
public:
// Add these so that the protected members of DwarfSectionImpl
// can be accessed without needing a this->.
using DwarfSectionImpl<AddressType>::memory_;
using DwarfSectionImpl<AddressType>::fde_count_;
using DwarfSectionImpl<AddressType>::last_error_;
struct FdeInfo {
FdeInfo(uint64_t offset, uint64_t start, uint64_t length)
: offset(offset), start(start), end(start + length) {}
uint64_t offset;
AddressType start;
AddressType end;
};
DwarfDebugFrame(Memory* memory) : DwarfSectionImpl<AddressType>(memory) {}
virtual ~DwarfDebugFrame() = default;
bool Init(uint64_t offset, uint64_t size) override;
bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) override;
const DwarfFde* GetFdeFromIndex(size_t index) override;
bool IsCie32(uint32_t value32) override { return value32 == static_cast<uint32_t>(-1); }
bool IsCie64(uint64_t value64) override { return value64 == static_cast<uint64_t>(-1); }
uint64_t GetCieOffsetFromFde32(uint32_t pointer) override { return offset_ + pointer; }
uint64_t GetCieOffsetFromFde64(uint64_t pointer) override { return offset_ + pointer; }
uint64_t AdjustPcFromFde(uint64_t pc) override { return pc; }
bool GetCieInfo(uint8_t* segment_size, uint8_t* encoding);
bool AddFdeInfo(uint64_t entry_offset, uint8_t segment_size, uint8_t encoding);
bool CreateSortedFdeList();
protected:
uint64_t offset_;
uint64_t end_offset_;
std::vector<FdeInfo> fdes_;
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_DWARF_DEBUG_FRAME_H
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