1 /* 2 * Copyright (C) 2017 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_DEBUG_FRAME_H 18 #define _LIBUNWINDSTACK_DWARF_DEBUG_FRAME_H 19 20 #include <stdint.h> 21 22 #include <vector> 23 24 #include <unwindstack/DwarfSection.h> 25 26 namespace unwindstack { 27 28 template <typename AddressType> 29 class DwarfDebugFrame : public DwarfSectionImpl<AddressType> { 30 public: 31 // Add these so that the protected members of DwarfSectionImpl 32 // can be accessed without needing a this->. 33 using DwarfSectionImpl<AddressType>::memory_; 34 using DwarfSectionImpl<AddressType>::fde_count_; 35 using DwarfSectionImpl<AddressType>::last_error_; 36 37 struct FdeInfo { 38 FdeInfo(uint64_t offset, uint64_t start, uint64_t length) 39 : offset(offset), start(start), end(start + length) {} 40 41 uint64_t offset; 42 AddressType start; 43 AddressType end; 44 }; 45 46 DwarfDebugFrame(Memory* memory) : DwarfSectionImpl<AddressType>(memory) {} 47 virtual ~DwarfDebugFrame() = default; 48 49 bool Init(uint64_t offset, uint64_t size) override; 50 51 bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) override; 52 53 const DwarfFde* GetFdeFromIndex(size_t index) override; 54 55 bool IsCie32(uint32_t value32) override { return value32 == static_cast<uint32_t>(-1); } 56 57 bool IsCie64(uint64_t value64) override { return value64 == static_cast<uint64_t>(-1); } 58 59 uint64_t GetCieOffsetFromFde32(uint32_t pointer) override { return offset_ + pointer; } 60 61 uint64_t GetCieOffsetFromFde64(uint64_t pointer) override { return offset_ + pointer; } 62 63 uint64_t AdjustPcFromFde(uint64_t pc) override { return pc; } 64 65 bool GetCieInfo(uint8_t* segment_size, uint8_t* encoding); 66 67 bool AddFdeInfo(uint64_t entry_offset, uint8_t segment_size, uint8_t encoding); 68 69 bool CreateSortedFdeList(); 70 71 protected: 72 uint64_t offset_; 73 uint64_t end_offset_; 74 75 std::vector<FdeInfo> fdes_; 76 }; 77 78 } // namespace unwindstack 79 80 #endif // _LIBUNWINDSTACK_DWARF_DEBUG_FRAME_H 81
