TargetLoweringObjectFile.cpp

  const MCSectionCOFF *&Entry = Map[Name];
  if (Entry) return Entry;

  return Entry = MCSectionCOFF::Create(Name, isDirective, Kind, getContext());
}

void TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx,
                                              const TargetMachine &TM) {
  if (UniquingMap != 0)
    ((COFFUniqueMapTy*)UniquingMap)->clear();
  TargetLoweringObjectFile::Initialize(Ctx, TM);
  TextSection = getCOFFSection("\t.text", true, SectionKind::getText());
  DataSection = getCOFFSection("\t.data", true, SectionKind::getDataRel());
  StaticCtorSection =
    getCOFFSection(".ctors", false, SectionKind::getDataRel());
  StaticDtorSection =
    getCOFFSection(".dtors", false, SectionKind::getDataRel());

  // FIXME: We're emitting LSDA info into a readonly section on COFF, even
  // though it contains relocatable pointers.  In PIC mode, this is probably a
  // big runtime hit for C++ apps.  Either the contents of the LSDA need to be
  // adjusted or this should be a data section.
  LSDASection =
    getCOFFSection(".gcc_except_table", false, SectionKind::getReadOnly());
  EHFrameSection =
    getCOFFSection(".eh_frame", false, SectionKind::getDataRel());

  // Debug info.
  // FIXME: Don't use 'directive' mode here.
  DwarfAbbrevSection =
    getCOFFSection("\t.section\t.debug_abbrev,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfInfoSection =
    getCOFFSection("\t.section\t.debug_info,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfLineSection =
    getCOFFSection("\t.section\t.debug_line,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfFrameSection =
    getCOFFSection("\t.section\t.debug_frame,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfPubNamesSection =
    getCOFFSection("\t.section\t.debug_pubnames,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfPubTypesSection =
    getCOFFSection("\t.section\t.debug_pubtypes,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfStrSection =
    getCOFFSection("\t.section\t.debug_str,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfLocSection =
    getCOFFSection("\t.section\t.debug_loc,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfARangesSection =
    getCOFFSection("\t.section\t.debug_aranges,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfRangesSection =
    getCOFFSection("\t.section\t.debug_ranges,\"dr\"",
                   true, SectionKind::getMetadata());
  DwarfMacroInfoSection =
    getCOFFSection("\t.section\t.debug_macinfo,\"dr\"",
                   true, SectionKind::getMetadata());
}

const MCSection *TargetLoweringObjectFileCOFF::
getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
                         Mangler *Mang, const TargetMachine &TM) const {
  return getCOFFSection(GV->getSection().c_str(), false, Kind);
}

static const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) {
  if (Kind.isText())
    return ".text$linkonce";
  if (Kind.isWriteable())
    return ".data$linkonce";
  return ".rdata$linkonce";
}


const MCSection *TargetLoweringObjectFileCOFF::
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
                       Mangler *Mang, const TargetMachine &TM) const {
  assert(!Kind.isThreadLocal() && "Doesn't support TLS");

  // If this global is linkonce/weak and the target handles this by emitting it
  // into a 'uniqued' section name, create and return the section now.
  if (GV->isWeakForLinker()) {
    const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind);
    SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
    Mang->getNameWithPrefix(Name, GV, false);
    return getCOFFSection(Name.str(), false, Kind);
  }

  if (Kind.isText())
    return getTextSection();

  return getDataSection();
}