diff options
Diffstat (limited to 'contrib/llvm/tools/lld/ELF/OutputSections.cpp')
| -rw-r--r-- | contrib/llvm/tools/lld/ELF/OutputSections.cpp | 442 | 
1 files changed, 213 insertions, 229 deletions
diff --git a/contrib/llvm/tools/lld/ELF/OutputSections.cpp b/contrib/llvm/tools/lld/ELF/OutputSections.cpp index c1442c078736..a89bd509bc96 100644 --- a/contrib/llvm/tools/lld/ELF/OutputSections.cpp +++ b/contrib/llvm/tools/lld/ELF/OutputSections.cpp @@ -1,9 +1,8 @@  //===- OutputSections.cpp -------------------------------------------------===//  // -//                             The LLVM Linker -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception  //  //===----------------------------------------------------------------------===// @@ -31,47 +30,46 @@ using namespace llvm::ELF;  using namespace lld;  using namespace lld::elf; -uint8_t Out::First; -PhdrEntry *Out::TlsPhdr; -OutputSection *Out::ElfHeader; -OutputSection *Out::ProgramHeaders; -OutputSection *Out::PreinitArray; -OutputSection *Out::InitArray; -OutputSection *Out::FiniArray; +uint8_t *Out::bufferStart; +uint8_t Out::first; +PhdrEntry *Out::tlsPhdr; +OutputSection *Out::elfHeader; +OutputSection *Out::programHeaders; +OutputSection *Out::preinitArray; +OutputSection *Out::initArray; +OutputSection *Out::finiArray; -std::vector<OutputSection *> elf::OutputSections; +std::vector<OutputSection *> elf::outputSections;  uint32_t OutputSection::getPhdrFlags() const { -  uint32_t Ret = 0; -  if (Config->EMachine != EM_ARM || !(Flags & SHF_ARM_PURECODE)) -    Ret |= PF_R; -  if (Flags & SHF_WRITE) -    Ret |= PF_W; -  if (Flags & SHF_EXECINSTR) -    Ret |= PF_X; -  return Ret; +  uint32_t ret = 0; +  if (config->emachine != EM_ARM || !(flags & SHF_ARM_PURECODE)) +    ret |= PF_R; +  if (flags & SHF_WRITE) +    ret |= PF_W; +  if (flags & SHF_EXECINSTR) +    ret |= PF_X; +  return ret;  }  template <class ELFT> -void OutputSection::writeHeaderTo(typename ELFT::Shdr *Shdr) { -  Shdr->sh_entsize = Entsize; -  Shdr->sh_addralign = Alignment; -  Shdr->sh_type = Type; -  Shdr->sh_offset = Offset; -  Shdr->sh_flags = Flags; -  Shdr->sh_info = Info; -  Shdr->sh_link = Link; -  Shdr->sh_addr = Addr; -  Shdr->sh_size = Size; -  Shdr->sh_name = ShName; +void OutputSection::writeHeaderTo(typename ELFT::Shdr *shdr) { +  shdr->sh_entsize = entsize; +  shdr->sh_addralign = alignment; +  shdr->sh_type = type; +  shdr->sh_offset = offset; +  shdr->sh_flags = flags; +  shdr->sh_info = info; +  shdr->sh_link = link; +  shdr->sh_addr = addr; +  shdr->sh_size = size; +  shdr->sh_name = shName;  } -OutputSection::OutputSection(StringRef Name, uint32_t Type, uint64_t Flags) +OutputSection::OutputSection(StringRef name, uint32_t type, uint64_t flags)      : BaseCommand(OutputSectionKind), -      SectionBase(Output, Name, Flags, /*Entsize*/ 0, /*Alignment*/ 1, Type, -                  /*Info*/ 0, /*Link*/ 0) { -  Live = false; -} +      SectionBase(Output, name, flags, /*Entsize*/ 0, /*Alignment*/ 1, type, +                  /*Info*/ 0, /*Link*/ 0) {}  // We allow sections of types listed below to merged into a  // single progbits section. This is typically done by linker @@ -79,257 +77,248 @@ OutputSection::OutputSection(StringRef Name, uint32_t Type, uint64_t Flags)  // to be allocated for nobits sections. Other ones don't require  // any special treatment on top of progbits, so there doesn't  // seem to be a harm in merging them. -static bool canMergeToProgbits(unsigned Type) { -  return Type == SHT_NOBITS || Type == SHT_PROGBITS || Type == SHT_INIT_ARRAY || -         Type == SHT_PREINIT_ARRAY || Type == SHT_FINI_ARRAY || -         Type == SHT_NOTE; +static bool canMergeToProgbits(unsigned type) { +  return type == SHT_NOBITS || type == SHT_PROGBITS || type == SHT_INIT_ARRAY || +         type == SHT_PREINIT_ARRAY || type == SHT_FINI_ARRAY || +         type == SHT_NOTE;  } -void OutputSection::addSection(InputSection *IS) { -  if (!Live) { +void OutputSection::addSection(InputSection *isec) { +  if (!hasInputSections) {      // If IS is the first section to be added to this section, -    // initialize Type, Entsize and flags from IS. -    Live = true; -    Type = IS->Type; -    Entsize = IS->Entsize; -    Flags = IS->Flags; +    // initialize Partition, Type, Entsize and flags from IS. +    hasInputSections = true; +    partition = isec->partition; +    type = isec->type; +    entsize = isec->entsize; +    flags = isec->flags;    } else {      // Otherwise, check if new type or flags are compatible with existing ones. -    unsigned Mask = SHF_TLS | SHF_LINK_ORDER; -    if ((Flags & Mask) != (IS->Flags & Mask)) -      error("incompatible section flags for " + Name + "\n>>> " + toString(IS) + -            ": 0x" + utohexstr(IS->Flags) + "\n>>> output section " + Name + -            ": 0x" + utohexstr(Flags)); - -    if (Type != IS->Type) { -      if (!canMergeToProgbits(Type) || !canMergeToProgbits(IS->Type)) -        error("section type mismatch for " + IS->Name + "\n>>> " + -              toString(IS) + ": " + -              getELFSectionTypeName(Config->EMachine, IS->Type) + -              "\n>>> output section " + Name + ": " + -              getELFSectionTypeName(Config->EMachine, Type)); -      Type = SHT_PROGBITS; +    unsigned mask = SHF_TLS | SHF_LINK_ORDER; +    if ((flags & mask) != (isec->flags & mask)) +      error("incompatible section flags for " + name + "\n>>> " + toString(isec) + +            ": 0x" + utohexstr(isec->flags) + "\n>>> output section " + name + +            ": 0x" + utohexstr(flags)); + +    if (type != isec->type) { +      if (!canMergeToProgbits(type) || !canMergeToProgbits(isec->type)) +        error("section type mismatch for " + isec->name + "\n>>> " + +              toString(isec) + ": " + +              getELFSectionTypeName(config->emachine, isec->type) + +              "\n>>> output section " + name + ": " + +              getELFSectionTypeName(config->emachine, type)); +      type = SHT_PROGBITS;      }    } -  IS->Parent = this; -  uint64_t AndMask = -      Config->EMachine == EM_ARM ? (uint64_t)SHF_ARM_PURECODE : 0; -  uint64_t OrMask = ~AndMask; -  uint64_t AndFlags = (Flags & IS->Flags) & AndMask; -  uint64_t OrFlags = (Flags | IS->Flags) & OrMask; -  Flags = AndFlags | OrFlags; +  isec->parent = this; +  uint64_t andMask = +      config->emachine == EM_ARM ? (uint64_t)SHF_ARM_PURECODE : 0; +  uint64_t orMask = ~andMask; +  uint64_t andFlags = (flags & isec->flags) & andMask; +  uint64_t orFlags = (flags | isec->flags) & orMask; +  flags = andFlags | orFlags; -  Alignment = std::max(Alignment, IS->Alignment); +  alignment = std::max(alignment, isec->alignment);    // If this section contains a table of fixed-size entries, sh_entsize    // holds the element size. If it contains elements of different size we    // set sh_entsize to 0. -  if (Entsize != IS->Entsize) -    Entsize = 0; - -  if (!IS->Assigned) { -    IS->Assigned = true; -    if (SectionCommands.empty() || -        !isa<InputSectionDescription>(SectionCommands.back())) -      SectionCommands.push_back(make<InputSectionDescription>("")); -    auto *ISD = cast<InputSectionDescription>(SectionCommands.back()); -    ISD->Sections.push_back(IS); +  if (entsize != isec->entsize) +    entsize = 0; + +  if (!isec->assigned) { +    isec->assigned = true; +    if (sectionCommands.empty() || +        !isa<InputSectionDescription>(sectionCommands.back())) +      sectionCommands.push_back(make<InputSectionDescription>("")); +    auto *isd = cast<InputSectionDescription>(sectionCommands.back()); +    isd->sections.push_back(isec);    }  } -static void sortByOrder(MutableArrayRef<InputSection *> In, -                        llvm::function_ref<int(InputSectionBase *S)> Order) { -  typedef std::pair<int, InputSection *> Pair; -  auto Comp = [](const Pair &A, const Pair &B) { return A.first < B.first; }; +static void sortByOrder(MutableArrayRef<InputSection *> in, +                        llvm::function_ref<int(InputSectionBase *s)> order) { +  std::vector<std::pair<int, InputSection *>> v; +  for (InputSection *s : in) +    v.push_back({order(s), s}); +  llvm::stable_sort(v, less_first()); -  std::vector<Pair> V; -  for (InputSection *S : In) -    V.push_back({Order(S), S}); -  std::stable_sort(V.begin(), V.end(), Comp); - -  for (size_t I = 0; I < V.size(); ++I) -    In[I] = V[I].second; +  for (size_t i = 0; i < v.size(); ++i) +    in[i] = v[i].second;  }  uint64_t elf::getHeaderSize() { -  if (Config->OFormatBinary) +  if (config->oFormatBinary)      return 0; -  return Out::ElfHeader->Size + Out::ProgramHeaders->Size; +  return Out::elfHeader->size + Out::programHeaders->size;  } -bool OutputSection::classof(const BaseCommand *C) { -  return C->Kind == OutputSectionKind; +bool OutputSection::classof(const BaseCommand *c) { +  return c->kind == OutputSectionKind;  } -void OutputSection::sort(llvm::function_ref<int(InputSectionBase *S)> Order) { -  assert(Live); -  for (BaseCommand *B : SectionCommands) -    if (auto *ISD = dyn_cast<InputSectionDescription>(B)) -      sortByOrder(ISD->Sections, Order); +void OutputSection::sort(llvm::function_ref<int(InputSectionBase *s)> order) { +  assert(isLive()); +  for (BaseCommand *b : sectionCommands) +    if (auto *isd = dyn_cast<InputSectionDescription>(b)) +      sortByOrder(isd->sections, order);  }  // Fill [Buf, Buf + Size) with Filler.  // This is used for linker script "=fillexp" command. -static void fill(uint8_t *Buf, size_t Size, -                 const std::array<uint8_t, 4> &Filler) { -  size_t I = 0; -  for (; I + 4 < Size; I += 4) -    memcpy(Buf + I, Filler.data(), 4); -  memcpy(Buf + I, Filler.data(), Size - I); +static void fill(uint8_t *buf, size_t size, +                 const std::array<uint8_t, 4> &filler) { +  size_t i = 0; +  for (; i + 4 < size; i += 4) +    memcpy(buf + i, filler.data(), 4); +  memcpy(buf + i, filler.data(), size - i);  }  // Compress section contents if this section contains debug info.  template <class ELFT> void OutputSection::maybeCompress() { -  typedef typename ELFT::Chdr Elf_Chdr; +  using Elf_Chdr = typename ELFT::Chdr;    // Compress only DWARF debug sections. -  if (!Config->CompressDebugSections || (Flags & SHF_ALLOC) || -      !Name.startswith(".debug_")) +  if (!config->compressDebugSections || (flags & SHF_ALLOC) || +      !name.startswith(".debug_"))      return;    // Create a section header. -  ZDebugHeader.resize(sizeof(Elf_Chdr)); -  auto *Hdr = reinterpret_cast<Elf_Chdr *>(ZDebugHeader.data()); -  Hdr->ch_type = ELFCOMPRESS_ZLIB; -  Hdr->ch_size = Size; -  Hdr->ch_addralign = Alignment; +  zDebugHeader.resize(sizeof(Elf_Chdr)); +  auto *hdr = reinterpret_cast<Elf_Chdr *>(zDebugHeader.data()); +  hdr->ch_type = ELFCOMPRESS_ZLIB; +  hdr->ch_size = size; +  hdr->ch_addralign = alignment;    // Write section contents to a temporary buffer and compress it. -  std::vector<uint8_t> Buf(Size); -  writeTo<ELFT>(Buf.data()); -  if (Error E = zlib::compress(toStringRef(Buf), CompressedData)) -    fatal("compress failed: " + llvm::toString(std::move(E))); +  std::vector<uint8_t> buf(size); +  writeTo<ELFT>(buf.data()); +  if (Error e = zlib::compress(toStringRef(buf), compressedData)) +    fatal("compress failed: " + llvm::toString(std::move(e)));    // Update section headers. -  Size = sizeof(Elf_Chdr) + CompressedData.size(); -  Flags |= SHF_COMPRESSED; +  size = sizeof(Elf_Chdr) + compressedData.size(); +  flags |= SHF_COMPRESSED;  } -static void writeInt(uint8_t *Buf, uint64_t Data, uint64_t Size) { -  if (Size == 1) -    *Buf = Data; -  else if (Size == 2) -    write16(Buf, Data); -  else if (Size == 4) -    write32(Buf, Data); -  else if (Size == 8) -    write64(Buf, Data); +static void writeInt(uint8_t *buf, uint64_t data, uint64_t size) { +  if (size == 1) +    *buf = data; +  else if (size == 2) +    write16(buf, data); +  else if (size == 4) +    write32(buf, data); +  else if (size == 8) +    write64(buf, data);    else      llvm_unreachable("unsupported Size argument");  } -template <class ELFT> void OutputSection::writeTo(uint8_t *Buf) { -  if (Type == SHT_NOBITS) +template <class ELFT> void OutputSection::writeTo(uint8_t *buf) { +  if (type == SHT_NOBITS)      return; -  Loc = Buf; -    // If -compress-debug-section is specified and if this is a debug seciton,    // we've already compressed section contents. If that's the case,    // just write it down. -  if (!CompressedData.empty()) { -    memcpy(Buf, ZDebugHeader.data(), ZDebugHeader.size()); -    memcpy(Buf + ZDebugHeader.size(), CompressedData.data(), -           CompressedData.size()); +  if (!compressedData.empty()) { +    memcpy(buf, zDebugHeader.data(), zDebugHeader.size()); +    memcpy(buf + zDebugHeader.size(), compressedData.data(), +           compressedData.size());      return;    }    // Write leading padding. -  std::vector<InputSection *> Sections = getInputSections(this); -  std::array<uint8_t, 4> Filler = getFiller(); -  bool NonZeroFiller = read32(Filler.data()) != 0; -  if (NonZeroFiller) -    fill(Buf, Sections.empty() ? Size : Sections[0]->OutSecOff, Filler); +  std::vector<InputSection *> sections = getInputSections(this); +  std::array<uint8_t, 4> filler = getFiller(); +  bool nonZeroFiller = read32(filler.data()) != 0; +  if (nonZeroFiller) +    fill(buf, sections.empty() ? size : sections[0]->outSecOff, filler); -  parallelForEachN(0, Sections.size(), [&](size_t I) { -    InputSection *IS = Sections[I]; -    IS->writeTo<ELFT>(Buf); +  parallelForEachN(0, sections.size(), [&](size_t i) { +    InputSection *isec = sections[i]; +    isec->writeTo<ELFT>(buf);      // Fill gaps between sections. -    if (NonZeroFiller) { -      uint8_t *Start = Buf + IS->OutSecOff + IS->getSize(); -      uint8_t *End; -      if (I + 1 == Sections.size()) -        End = Buf + Size; +    if (nonZeroFiller) { +      uint8_t *start = buf + isec->outSecOff + isec->getSize(); +      uint8_t *end; +      if (i + 1 == sections.size()) +        end = buf + size;        else -        End = Buf + Sections[I + 1]->OutSecOff; -      fill(Start, End - Start, Filler); +        end = buf + sections[i + 1]->outSecOff; +      fill(start, end - start, filler);      }    });    // Linker scripts may have BYTE()-family commands with which you    // can write arbitrary bytes to the output. Process them if any. -  for (BaseCommand *Base : SectionCommands) -    if (auto *Data = dyn_cast<ByteCommand>(Base)) -      writeInt(Buf + Data->Offset, Data->Expression().getValue(), Data->Size); +  for (BaseCommand *base : sectionCommands) +    if (auto *data = dyn_cast<ByteCommand>(base)) +      writeInt(buf + data->offset, data->expression().getValue(), data->size);  } -template <class ELFT> -static void finalizeShtGroup(OutputSection *OS, -                             InputSection *Section) { -  assert(Config->Relocatable); +static void finalizeShtGroup(OutputSection *os, +                             InputSection *section) { +  assert(config->relocatable);    // sh_link field for SHT_GROUP sections should contain the section index of    // the symbol table. -  OS->Link = In.SymTab->getParent()->SectionIndex; +  os->link = in.symTab->getParent()->sectionIndex;    // sh_info then contain index of an entry in symbol table section which    // provides signature of the section group. -  ObjFile<ELFT> *Obj = Section->getFile<ELFT>(); -  ArrayRef<Symbol *> Symbols = Obj->getSymbols(); -  OS->Info = In.SymTab->getSymbolIndex(Symbols[Section->Info]); +  ArrayRef<Symbol *> symbols = section->file->getSymbols(); +  os->info = in.symTab->getSymbolIndex(symbols[section->info]);  } -template <class ELFT> void OutputSection::finalize() { -  if (Type == SHT_NOBITS) -    for (BaseCommand *Base : SectionCommands) -      if (isa<ByteCommand>(Base)) -        Type = SHT_PROGBITS; - -  std::vector<InputSection *> V = getInputSections(this); -  InputSection *First = V.empty() ? nullptr : V[0]; +void OutputSection::finalize() { +  std::vector<InputSection *> v = getInputSections(this); +  InputSection *first = v.empty() ? nullptr : v[0]; -  if (Flags & SHF_LINK_ORDER) { +  if (flags & SHF_LINK_ORDER) {      // We must preserve the link order dependency of sections with the      // SHF_LINK_ORDER flag. The dependency is indicated by the sh_link field. We      // need to translate the InputSection sh_link to the OutputSection sh_link,      // all InputSections in the OutputSection have the same dependency. -    if (auto *D = First->getLinkOrderDep()) -      Link = D->getParent()->SectionIndex; +    if (auto *ex = dyn_cast<ARMExidxSyntheticSection>(first)) +      link = ex->getLinkOrderDep()->getParent()->sectionIndex; +    else if (auto *d = first->getLinkOrderDep()) +      link = d->getParent()->sectionIndex;    } -  if (Type == SHT_GROUP) { -    finalizeShtGroup<ELFT>(this, First); +  if (type == SHT_GROUP) { +    finalizeShtGroup(this, first);      return;    } -  if (!Config->CopyRelocs || (Type != SHT_RELA && Type != SHT_REL)) +  if (!config->copyRelocs || (type != SHT_RELA && type != SHT_REL))      return; -  if (isa<SyntheticSection>(First)) +  if (isa<SyntheticSection>(first))      return; -  Link = In.SymTab->getParent()->SectionIndex; +  link = in.symTab->getParent()->sectionIndex;    // sh_info for SHT_REL[A] sections should contain the section header index of    // the section to which the relocation applies. -  InputSectionBase *S = First->getRelocatedSection(); -  Info = S->getOutputSection()->SectionIndex; -  Flags |= SHF_INFO_LINK; +  InputSectionBase *s = first->getRelocatedSection(); +  info = s->getOutputSection()->sectionIndex; +  flags |= SHF_INFO_LINK;  }  // Returns true if S matches /Filename.?\.o$/. -static bool isCrtBeginEnd(StringRef S, StringRef Filename) { -  if (!S.endswith(".o")) +static bool isCrtBeginEnd(StringRef s, StringRef filename) { +  if (!s.endswith(".o"))      return false; -  S = S.drop_back(2); -  if (S.endswith(Filename)) +  s = s.drop_back(2); +  if (s.endswith(filename))      return true; -  return !S.empty() && S.drop_back().endswith(Filename); +  return !s.empty() && s.drop_back().endswith(filename);  } -static bool isCrtbegin(StringRef S) { return isCrtBeginEnd(S, "crtbegin"); } -static bool isCrtend(StringRef S) { return isCrtBeginEnd(S, "crtend"); } +static bool isCrtbegin(StringRef s) { return isCrtBeginEnd(s, "crtbegin"); } +static bool isCrtend(StringRef s) { return isCrtBeginEnd(s, "crtend"); }  // .ctors and .dtors are sorted by this priority from highest to lowest.  // @@ -349,52 +338,52 @@ static bool isCrtend(StringRef S) { return isCrtBeginEnd(S, "crtend"); }  // .ctors are duplicate features (and .init_array is newer.) However, there  // are too many real-world use cases of .ctors, so we had no choice to  // support that with this rather ad-hoc semantics. -static bool compCtors(const InputSection *A, const InputSection *B) { -  bool BeginA = isCrtbegin(A->File->getName()); -  bool BeginB = isCrtbegin(B->File->getName()); -  if (BeginA != BeginB) -    return BeginA; -  bool EndA = isCrtend(A->File->getName()); -  bool EndB = isCrtend(B->File->getName()); -  if (EndA != EndB) -    return EndB; -  StringRef X = A->Name; -  StringRef Y = B->Name; -  assert(X.startswith(".ctors") || X.startswith(".dtors")); -  assert(Y.startswith(".ctors") || Y.startswith(".dtors")); -  X = X.substr(6); -  Y = Y.substr(6); -  return X < Y; +static bool compCtors(const InputSection *a, const InputSection *b) { +  bool beginA = isCrtbegin(a->file->getName()); +  bool beginB = isCrtbegin(b->file->getName()); +  if (beginA != beginB) +    return beginA; +  bool endA = isCrtend(a->file->getName()); +  bool endB = isCrtend(b->file->getName()); +  if (endA != endB) +    return endB; +  StringRef x = a->name; +  StringRef y = b->name; +  assert(x.startswith(".ctors") || x.startswith(".dtors")); +  assert(y.startswith(".ctors") || y.startswith(".dtors")); +  x = x.substr(6); +  y = y.substr(6); +  return x < y;  }  // Sorts input sections by the special rules for .ctors and .dtors.  // Unfortunately, the rules are different from the one for .{init,fini}_array.  // Read the comment above.  void OutputSection::sortCtorsDtors() { -  assert(SectionCommands.size() == 1); -  auto *ISD = cast<InputSectionDescription>(SectionCommands[0]); -  std::stable_sort(ISD->Sections.begin(), ISD->Sections.end(), compCtors); +  assert(sectionCommands.size() == 1); +  auto *isd = cast<InputSectionDescription>(sectionCommands[0]); +  llvm::stable_sort(isd->sections, compCtors);  }  // If an input string is in the form of "foo.N" where N is a number,  // return N. Otherwise, returns 65536, which is one greater than the  // lowest priority. -int elf::getPriority(StringRef S) { -  size_t Pos = S.rfind('.'); -  if (Pos == StringRef::npos) +int elf::getPriority(StringRef s) { +  size_t pos = s.rfind('.'); +  if (pos == StringRef::npos)      return 65536; -  int V; -  if (!to_integer(S.substr(Pos + 1), V, 10)) +  int v; +  if (!to_integer(s.substr(pos + 1), v, 10))      return 65536; -  return V; +  return v;  } -std::vector<InputSection *> elf::getInputSections(OutputSection *OS) { -  std::vector<InputSection *> Ret; -  for (BaseCommand *Base : OS->SectionCommands) -    if (auto *ISD = dyn_cast<InputSectionDescription>(Base)) -      Ret.insert(Ret.end(), ISD->Sections.begin(), ISD->Sections.end()); -  return Ret; +std::vector<InputSection *> elf::getInputSections(OutputSection *os) { +  std::vector<InputSection *> ret; +  for (BaseCommand *base : os->sectionCommands) +    if (auto *isd = dyn_cast<InputSectionDescription>(base)) +      ret.insert(ret.end(), isd->sections.begin(), isd->sections.end()); +  return ret;  }  // Sorts input sections by section name suffixes, so that .foo.N comes @@ -405,14 +394,14 @@ std::vector<InputSection *> elf::getInputSections(OutputSection *OS) {  // For more detail, read the section of the GCC's manual about init_priority.  void OutputSection::sortInitFini() {    // Sort sections by priority. -  sort([](InputSectionBase *S) { return getPriority(S->Name); }); +  sort([](InputSectionBase *s) { return getPriority(s->name); });  }  std::array<uint8_t, 4> OutputSection::getFiller() { -  if (Filler) -    return *Filler; -  if (Flags & SHF_EXECINSTR) -    return Target->TrapInstr; +  if (filler) +    return *filler; +  if (flags & SHF_EXECINSTR) +    return target->trapInstr;    return {0, 0, 0, 0};  } @@ -430,8 +419,3 @@ template void OutputSection::maybeCompress<ELF32LE>();  template void OutputSection::maybeCompress<ELF32BE>();  template void OutputSection::maybeCompress<ELF64LE>();  template void OutputSection::maybeCompress<ELF64BE>(); - -template void OutputSection::finalize<ELF32LE>(); -template void OutputSection::finalize<ELF32BE>(); -template void OutputSection::finalize<ELF64LE>(); -template void OutputSection::finalize<ELF64BE>();  | 
