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/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