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93 lines
2.6 KiB
93 lines
2.6 KiB
/* |
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* Copyright (C) 2016 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef _LIBUNWINDSTACK_DWARF_EH_FRAME_H |
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#define _LIBUNWINDSTACK_DWARF_EH_FRAME_H |
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#include <stdint.h> |
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#include <unwindstack/DwarfSection.h> |
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namespace unwindstack { |
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// Forward declarations. |
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class Memory; |
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template <typename AddressType> |
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class DwarfEhFrame : public DwarfSectionImpl<AddressType> { |
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public: |
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// Add these so that the protected members of DwarfSectionImpl |
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// can be accessed without needing a this->. |
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using DwarfSectionImpl<AddressType>::memory_; |
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using DwarfSectionImpl<AddressType>::fde_count_; |
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using DwarfSectionImpl<AddressType>::last_error_; |
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struct FdeInfo { |
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AddressType pc; |
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uint64_t offset; |
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}; |
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DwarfEhFrame(Memory* memory) : DwarfSectionImpl<AddressType>(memory) {} |
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virtual ~DwarfEhFrame() = default; |
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bool Init(uint64_t offset, uint64_t size) override; |
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bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) override; |
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const DwarfFde* GetFdeFromIndex(size_t index) override; |
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bool IsCie32(uint32_t value32) override { return value32 == 0; } |
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bool IsCie64(uint64_t value64) override { return value64 == 0; } |
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uint64_t GetCieOffsetFromFde32(uint32_t pointer) override { |
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return memory_.cur_offset() - pointer - 4; |
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} |
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uint64_t GetCieOffsetFromFde64(uint64_t pointer) override { |
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return memory_.cur_offset() - pointer - 8; |
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} |
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uint64_t AdjustPcFromFde(uint64_t pc) override { |
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// The eh_frame uses relative pcs. |
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return pc + memory_.cur_offset(); |
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} |
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const FdeInfo* GetFdeInfoFromIndex(size_t index); |
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bool GetFdeOffsetSequential(uint64_t pc, uint64_t* fde_offset); |
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bool GetFdeOffsetBinary(uint64_t pc, uint64_t* fde_offset, uint64_t total_entries); |
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protected: |
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uint8_t version_; |
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uint8_t ptr_encoding_; |
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uint8_t table_encoding_; |
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size_t table_entry_size_; |
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uint64_t ptr_offset_; |
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uint64_t entries_offset_; |
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uint64_t entries_end_; |
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uint64_t entries_data_offset_; |
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uint64_t cur_entries_offset_ = 0; |
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std::unordered_map<uint64_t, FdeInfo> fde_info_; |
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}; |
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} // namespace unwindstack |
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#endif // _LIBUNWINDSTACK_DWARF_EH_FRAME_H
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