1 //===- DWARF.h -----------------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===-------------------------------------------------------------------===// 8 9 #ifndef LLD_ELF_DWARF_H 10 #define LLD_ELF_DWARF_H 11 12 #include "InputFiles.h" 13 #include "llvm/ADT/STLExtras.h" 14 #include "llvm/ADT/STLFunctionalExtras.h" 15 #include "llvm/DebugInfo/DWARF/DWARFContext.h" 16 #include "llvm/Object/ELF.h" 17 #include <optional> 18 19 namespace lld::elf { 20 21 class InputSection; 22 23 struct LLDDWARFSection final : public llvm::DWARFSection { 24 InputSectionBase *sec = nullptr; 25 }; 26 27 template <class ELFT> class LLDDwarfObj final : public llvm::DWARFObject { 28 public: 29 explicit LLDDwarfObj(ObjFile<ELFT> *obj); 30 31 void forEachInfoSections( 32 llvm::function_ref<void(const llvm::DWARFSection &)> f) const override { 33 f(infoSection); 34 } 35 36 InputSection *getInfoSection() const { 37 return cast<InputSection>(infoSection.sec); 38 } 39 40 const llvm::DWARFSection &getAddrSection() const override { 41 return addrSection; 42 } 43 const llvm::DWARFSection &getLineSection() const override { 44 return lineSection; 45 } 46 const llvm::DWARFSection &getLoclistsSection() const override { 47 return loclistsSection; 48 } 49 const llvm::DWARFSection &getRangesSection() const override { 50 return rangesSection; 51 } 52 const llvm::DWARFSection &getRnglistsSection() const override { 53 return rnglistsSection; 54 } 55 const llvm::DWARFSection &getStrOffsetsSection() const override { 56 return strOffsetsSection; 57 } 58 59 const LLDDWARFSection &getGnuPubnamesSection() const override { 60 return gnuPubnamesSection; 61 } 62 const LLDDWARFSection &getGnuPubtypesSection() const override { 63 return gnuPubtypesSection; 64 } 65 const LLDDWARFSection &getNamesSection() const override { 66 return namesSection; 67 } 68 69 StringRef getFileName() const override { return ""; } 70 StringRef getAbbrevSection() const override { return abbrevSection; } 71 StringRef getStrSection() const override { return strSection; } 72 StringRef getLineStrSection() const override { return lineStrSection; } 73 74 bool isLittleEndian() const override { 75 return ELFT::Endianness == llvm::endianness::little; 76 } 77 78 std::optional<llvm::RelocAddrEntry> find(const llvm::DWARFSection &sec, 79 uint64_t pos) const override; 80 81 private: 82 template <class RelTy> 83 std::optional<llvm::RelocAddrEntry> findAux(const InputSectionBase &sec, 84 uint64_t pos, 85 ArrayRef<RelTy> rels) const; 86 87 LLDDWARFSection addrSection; 88 LLDDWARFSection gnuPubnamesSection; 89 LLDDWARFSection gnuPubtypesSection; 90 LLDDWARFSection infoSection; 91 LLDDWARFSection lineSection; 92 LLDDWARFSection loclistsSection; 93 LLDDWARFSection namesSection; 94 LLDDWARFSection rangesSection; 95 LLDDWARFSection rnglistsSection; 96 LLDDWARFSection strOffsetsSection; 97 StringRef abbrevSection; 98 StringRef lineStrSection; 99 StringRef strSection; 100 }; 101 102 } // namespace lld::elf 103 104 #endif 105