Ejemplo n.º 1
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void DWARFUnitSectionBase::parse(DWARFContext &C, const DWARFSection &Section) {
  const DWARFObject &D = C.getDWARFObj();
  parseImpl(C, Section, C.getDebugAbbrev(), &D.getRangeSection(),
            D.getStringSection(), D.getStringOffsetSection(),
            &D.getAddrSection(), D.getLineSection(), D.isLittleEndian(), false,
            false);
}
Ejemplo n.º 2
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void DWARFUnitSectionBase::parseDWO(DWARFContext &C,
                                    const DWARFSection &DWOSection, bool Lazy) {
  const DWARFObject &D = C.getDWARFObj();
  parseImpl(C, DWOSection, C.getDebugAbbrevDWO(), &D.getRangeDWOSection(),
            D.getStringDWOSection(), D.getStringOffsetDWOSection(),
            &D.getAddrSection(), D.getLineDWOSection(), C.isLittleEndian(),
            true, Lazy);
}
Ejemplo n.º 3
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void DWARFUnitVector::addUnitsForSection(DWARFContext &C,
                                         const DWARFSection &Section,
                                         DWARFSectionKind SectionKind) {
  const DWARFObject &D = C.getDWARFObj();
  addUnitsImpl(C, D, Section, C.getDebugAbbrev(), &D.getRangeSection(),
               D.getStringSection(), D.getStringOffsetSection(),
               &D.getAddrSection(), D.getLineSection(), D.isLittleEndian(),
               false, false, SectionKind);
}
Ejemplo n.º 4
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void DWARFUnitVector::addUnitsForDWOSection(DWARFContext &C,
                                            const DWARFSection &DWOSection,
                                            DWARFSectionKind SectionKind,
                                            bool Lazy) {
  const DWARFObject &D = C.getDWARFObj();
  addUnitsImpl(C, D, DWOSection, C.getDebugAbbrevDWO(), &D.getRangeDWOSection(),
               D.getStringDWOSection(), D.getStringOffsetDWOSection(),
               &D.getAddrSection(), D.getLineDWOSection(), C.isLittleEndian(),
               true, Lazy, SectionKind);
}
Ejemplo n.º 5
0
/// Emit location lists for \p Unit and update attributes to point to the new
/// entries.
void DwarfStreamer::emitLocationsForUnit(const CompileUnit &Unit,
                                         DWARFContext &Dwarf) {
  const auto &Attributes = Unit.getLocationAttributes();

  if (Attributes.empty())
    return;

  MS->SwitchSection(MC->getObjectFileInfo()->getDwarfLocSection());

  unsigned AddressSize = Unit.getOrigUnit().getAddressByteSize();
  const DWARFSection &InputSec = Dwarf.getDWARFObj().getLocSection();
  DataExtractor Data(InputSec.Data, Dwarf.isLittleEndian(), AddressSize);
  DWARFUnit &OrigUnit = Unit.getOrigUnit();
  auto OrigUnitDie = OrigUnit.getUnitDIE(false);
  int64_t UnitPcOffset = 0;
  if (auto OrigLowPc = dwarf::toAddress(OrigUnitDie.find(dwarf::DW_AT_low_pc)))
    UnitPcOffset = int64_t(*OrigLowPc) - Unit.getLowPc();

  for (const auto &Attr : Attributes) {
    uint32_t Offset = Attr.first.get();
    Attr.first.set(LocSectionSize);
    // This is the quantity to add to the old location address to get
    // the correct address for the new one.
    int64_t LocPcOffset = Attr.second + UnitPcOffset;
    while (Data.isValidOffset(Offset)) {
      uint64_t Low = Data.getUnsigned(&Offset, AddressSize);
      uint64_t High = Data.getUnsigned(&Offset, AddressSize);
      LocSectionSize += 2 * AddressSize;
      if (Low == 0 && High == 0) {
        Asm->OutStreamer->EmitIntValue(0, AddressSize);
        Asm->OutStreamer->EmitIntValue(0, AddressSize);
        break;
      }
      Asm->OutStreamer->EmitIntValue(Low + LocPcOffset, AddressSize);
      Asm->OutStreamer->EmitIntValue(High + LocPcOffset, AddressSize);
      uint64_t Length = Data.getU16(&Offset);
      Asm->OutStreamer->EmitIntValue(Length, 2);
      // Just copy the bytes over.
      Asm->OutStreamer->EmitBytes(
          StringRef(InputSec.Data.substr(Offset, Length)));
      Offset += Length;
      LocSectionSize += Length + 2;
    }
  }
}