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_EH_FRAME_WITH_HDR_H 18 #define _LIBUNWINDSTACK_DWARF_EH_FRAME_WITH_HDR_H 19 20 #include <stdint.h> 21 22 #include <unordered_map> 23 24 #include "DwarfEhFrame.h" 25 26 namespace unwindstack { 27 28 // Forward declarations. 29 class Memory; 30 31 template <typename AddressType> 32 class DwarfEhFrameWithHdr : public DwarfEhFrame<AddressType> { 33 public: 34 // Add these so that the protected members of DwarfSectionImpl 35 // can be accessed without needing a this->. 36 using DwarfSectionImpl<AddressType>::memory_; 37 using DwarfSectionImpl<AddressType>::fde_count_; 38 using DwarfSectionImpl<AddressType>::entries_offset_; 39 using DwarfSectionImpl<AddressType>::entries_end_; 40 using DwarfSectionImpl<AddressType>::last_error_; 41 42 struct FdeInfo { 43 AddressType pc; 44 uint64_t offset; 45 }; 46 47 DwarfEhFrameWithHdr(Memory* memory) : DwarfEhFrame<AddressType>(memory) {} 48 virtual ~DwarfEhFrameWithHdr() = default; 49 50 bool Init(uint64_t offset, uint64_t size) override; 51 52 bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) override; 53 54 const DwarfFde* GetFdeFromIndex(size_t index) override; 55 56 const FdeInfo* GetFdeInfoFromIndex(size_t index); 57 58 bool GetFdeOffsetSequential(uint64_t pc, uint64_t* fde_offset); 59 60 bool GetFdeOffsetBinary(uint64_t pc, uint64_t* fde_offset, uint64_t total_entries); 61 62 protected: 63 uint8_t version_; 64 uint8_t ptr_encoding_; 65 uint8_t table_encoding_; 66 size_t table_entry_size_; 67 68 uint64_t ptr_offset_; 69 70 uint64_t entries_data_offset_; 71 uint64_t cur_entries_offset_ = 0; 72 73 std::unordered_map<uint64_t, FdeInfo> fde_info_; 74 }; 75 76 } // namespace unwindstack 77 78 #endif // _LIBUNWINDSTACK_DWARF_EH_FRAME_WITH_HDR_H 79
