lld/ELF/DWARF.h

   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/DebugInfo/DWARF/DWARFContext.h"
  15 #include "llvm/Object/ELF.h"
  16
  17 namespace lld::elf {
  18
  19 class InputSection;
  20
  21 struct LLDDWARFSection final : public llvm::DWARFSection {
  22   InputSectionBase *sec = nullptr;
  23 };
  24
  25 template <class ELFT> class LLDDwarfObj final : public llvm::DWARFObject {
  26 public:
  27   explicit LLDDwarfObj(ObjFile<ELFT> *obj);
  28
  29   void forEachInfoSections(
  30       llvm::function_ref<void(const llvm::DWARFSection &)> f) const override {
  31     f(infoSection);
  32   }
  33
  34   InputSection *getInfoSection() const {
  35     return cast<InputSection>(infoSection.sec);
  36   }
  37
  38   const llvm::DWARFSection &getLoclistsSection() const override {
  39     return loclistsSection;
  40   }
  41
  42   const llvm::DWARFSection &getRangesSection() const override {
  43     return rangesSection;
  44   }
  45
  46   const llvm::DWARFSection &getRnglistsSection() const override {
  47     return rnglistsSection;
  48   }
  49
  50   const llvm::DWARFSection &getStrOffsetsSection() const override {
  51     return strOffsetsSection;
  52   }
  53
  54   const llvm::DWARFSection &getLineSection() const override {
  55     return lineSection;
  56   }
  57
  58   const llvm::DWARFSection &getAddrSection() const override {
  59     return addrSection;
  60   }
  61
  62   const LLDDWARFSection &getGnuPubnamesSection() const override {
  63     return gnuPubnamesSection;
  64   }
  65
  66   const LLDDWARFSection &getGnuPubtypesSection() const override {
  67     return gnuPubtypesSection;
  68   }
  69
  70   StringRef getFileName() const override { return ""; }
  71   StringRef getAbbrevSection() const override { return abbrevSection; }
  72   StringRef getStrSection() const override { return strSection; }
  73   StringRef getLineStrSection() const override { return lineStrSection; }
  74
  75   bool isLittleEndian() const override {
  76     return ELFT::TargetEndianness == llvm::endianness::little;
  77   }
  78
  79   std::optional<llvm::RelocAddrEntry> find(const llvm::DWARFSection &sec,
  80                                            uint64_t pos) const override;
  81
  82 private:
  83   template <class RelTy>
  84   std::optional<llvm::RelocAddrEntry> findAux(const InputSectionBase &sec,
  85                                               uint64_t pos,
  86                                               ArrayRef<RelTy> rels) const;
  87
  88   LLDDWARFSection gnuPubnamesSection;
  89   LLDDWARFSection gnuPubtypesSection;
  90   LLDDWARFSection infoSection;
  91   LLDDWARFSection loclistsSection;
  92   LLDDWARFSection rangesSection;
  93   LLDDWARFSection rnglistsSection;
  94   LLDDWARFSection strOffsetsSection;
  95   LLDDWARFSection lineSection;
  96   LLDDWARFSection addrSection;
  97   StringRef abbrevSection;
  98   StringRef strSection;
  99   StringRef lineStrSection;
 100 };
 101
 102 } // namespace lld::elf
 103
 104 #endif