tools/yaml2obj/yaml2dwarf.cpp - llvm - Git at Google

 //===- yaml2dwarf - Convert YAML to DWARF binary data ---------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// \brief The DWARF component of yaml2obj.
 ///
 //===----------------------------------------------------------------------===//

 #include "llvm/ObjectYAML/DWARFYAML.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/LEB128.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/SwapByteOrder.h"

 #include <algorithm>

 using namespace llvm;

 template <typename T>
 void writeInteger(T Integer, raw_ostream &OS, bool IsLittleEndian) {
   if (IsLittleEndian != sys::IsLittleEndianHost)
     sys::swapByteOrder(Integer);
   OS.write(reinterpret_cast<char *>(&Integer), sizeof(T));
 }

 void writeVariableSizedInteger(uint64_t Integer, size_t Size, raw_ostream &OS,
                                bool IsLittleEndian) {
   if (8 == Size)
     writeInteger((uint64_t)Integer, OS, IsLittleEndian);
   else if (4 == Size)
     writeInteger((uint32_t)Integer, OS, IsLittleEndian);
   else if (2 == Size)
     writeInteger((uint16_t)Integer, OS, IsLittleEndian);
   else if (1 == Size)
     writeInteger((uint8_t)Integer, OS, IsLittleEndian);
   else
     assert(false && "Invalid integer write size.");
 }

 void ZeroFillBytes(raw_ostream &OS, size_t Size) {
   std::vector<uint8_t> FillData;
   FillData.insert(FillData.begin(), Size, 0);
   OS.write(reinterpret_cast<char *>(FillData.data()), Size);
 }

 void yaml2debug_str(raw_ostream &OS, const DWARFYAML::Data &DI) {
   for (auto Str : DI.DebugStrings) {
     OS.write(Str.data(), Str.size());
     OS.write('\0');
   }
 }

 void yaml2debug_abbrev(raw_ostream &OS, const DWARFYAML::Data &DI) {
   for (auto AbbrevDecl : DI.AbbrevDecls) {
     encodeULEB128(AbbrevDecl.Code, OS);
     encodeULEB128(AbbrevDecl.Tag, OS);
     OS.write(AbbrevDecl.Children);
     for (auto Attr : AbbrevDecl.Attributes) {
       encodeULEB128(Attr.Attribute, OS);
       encodeULEB128(Attr.Form, OS);
     }
     encodeULEB128(0, OS);
     encodeULEB128(0, OS);
   }
 }

 void yaml2debug_aranges(raw_ostream &OS, const DWARFYAML::Data &DI) {
   for (auto Range : DI.ARanges) {
     auto HeaderStart = OS.tell();
     writeInteger((uint32_t)Range.Length, OS, DI.IsLittleEndian);
     writeInteger((uint16_t)Range.Version, OS, DI.IsLittleEndian);
     writeInteger((uint32_t)Range.CuOffset, OS, DI.IsLittleEndian);
     writeInteger((uint8_t)Range.AddrSize, OS, DI.IsLittleEndian);
     writeInteger((uint8_t)Range.SegSize, OS, DI.IsLittleEndian);

     auto HeaderSize = OS.tell() - HeaderStart;
     auto FirstDescriptor = alignTo(HeaderSize, Range.AddrSize * 2);
     ZeroFillBytes(OS, FirstDescriptor - HeaderSize);

     for (auto Descriptor : Range.Descriptors) {
       writeVariableSizedInteger(Descriptor.Address, Range.AddrSize, OS,
                                 DI.IsLittleEndian);
       writeVariableSizedInteger(Descriptor.Length, Range.AddrSize, OS,
                                 DI.IsLittleEndian);
     }
     ZeroFillBytes(OS, Range.AddrSize * 2);
   }
 }

 void yaml2pubsection(raw_ostream &OS, const DWARFYAML::PubSection &Sect,
                      bool IsLittleEndian) {
   writeInteger((uint32_t)Sect.Length, OS, IsLittleEndian);
   writeInteger((uint16_t)Sect.Version, OS, IsLittleEndian);
   writeInteger((uint32_t)Sect.UnitOffset, OS, IsLittleEndian);
   writeInteger((uint32_t)Sect.UnitSize, OS, IsLittleEndian);
   for (auto Entry : Sect.Entries) {
     writeInteger((uint32_t)Entry.DieOffset, OS, IsLittleEndian);
     if (Sect.IsGNUStyle)
       writeInteger((uint32_t)Entry.Descriptor, OS, IsLittleEndian);
     OS.write(Entry.Name.data(), Entry.Name.size());
     OS.write('\0');
   }
 }

 void yaml2debug_info(raw_ostream &OS, const DWARFYAML::Data &DI) {

   for (auto CU : DI.CompileUnits) {
     writeInteger((uint32_t)CU.Length, OS, DI.IsLittleEndian);
     writeInteger((uint16_t)CU.Version, OS, DI.IsLittleEndian);
     writeInteger((uint32_t)CU.AbbrOffset, OS, DI.IsLittleEndian);
     writeInteger((uint8_t)CU.AddrSize, OS, DI.IsLittleEndian);

     auto FirstAbbrevCode = CU.Entries[0].AbbrCode;

     for (auto Entry : CU.Entries) {
       encodeULEB128(Entry.AbbrCode, OS);
       if (Entry.AbbrCode == 0u)
         continue;
       bool Indirect = false;
       assert(Entry.AbbrCode - FirstAbbrevCode < DI.AbbrevDecls.size() &&
              "Out of range AbbCode");
       auto &Abbrev = DI.AbbrevDecls[Entry.AbbrCode - FirstAbbrevCode];

       auto FormVal = Entry.Values.begin();
       auto AbbrForm = Abbrev.Attributes.begin();
       for (;
            FormVal != Entry.Values.end() && AbbrForm != Abbrev.Attributes.end();
            ++FormVal, ++AbbrForm) {
         dwarf::Form Form = AbbrForm->Form;
         do {
           Indirect = false;
           switch (Form) {
           case dwarf::DW_FORM_addr:
             writeVariableSizedInteger(FormVal->Value, CU.AddrSize, OS,
                                       DI.IsLittleEndian);
             break;
           case dwarf::DW_FORM_ref_addr: {
             // TODO: Handle DWARF32/DWARF64 after Line Table data is done
             auto writeSize = CU.Version == 2 ? CU.AddrSize : 4;
             writeVariableSizedInteger(FormVal->Value, writeSize, OS,
                                       DI.IsLittleEndian);
             break;
           }
           case dwarf::DW_FORM_exprloc:
           case dwarf::DW_FORM_block:
             encodeULEB128(FormVal->BlockData.size(), OS);
             OS.write(reinterpret_cast<char *>(&FormVal->BlockData[0]),
                      FormVal->BlockData.size());
             break;
           case dwarf::DW_FORM_block1: {
             auto writeSize = FormVal->BlockData.size();
             writeInteger((uint8_t)writeSize, OS, DI.IsLittleEndian);
             OS.write(reinterpret_cast<char *>(&FormVal->BlockData[0]),
                      FormVal->BlockData.size());
             break;
           }
           case dwarf::DW_FORM_block2: {
             auto writeSize = FormVal->BlockData.size();
             writeInteger((uint16_t)writeSize, OS, DI.IsLittleEndian);
             OS.write(reinterpret_cast<char *>(&FormVal->BlockData[0]),
                      FormVal->BlockData.size());
             break;
           }
           case dwarf::DW_FORM_block4: {
             auto writeSize = FormVal->BlockData.size();
             writeInteger((uint32_t)writeSize, OS, DI.IsLittleEndian);
             OS.write(reinterpret_cast<char *>(&FormVal->BlockData[0]),
                      FormVal->BlockData.size());
             break;
           }
           case dwarf::DW_FORM_data1:
           case dwarf::DW_FORM_ref1:
           case dwarf::DW_FORM_flag:
             writeInteger((uint8_t)FormVal->Value, OS, DI.IsLittleEndian);
             break;
           case dwarf::DW_FORM_data2:
           case dwarf::DW_FORM_ref2:
             writeInteger((uint16_t)FormVal->Value, OS, DI.IsLittleEndian);
             break;
           case dwarf::DW_FORM_data4:
           case dwarf::DW_FORM_ref4:
             writeInteger((uint32_t)FormVal->Value, OS, DI.IsLittleEndian);
             break;
           case dwarf::DW_FORM_data8:
           case dwarf::DW_FORM_ref8:
             writeInteger((uint64_t)FormVal->Value, OS, DI.IsLittleEndian);
             break;
           case dwarf::DW_FORM_sdata:
             encodeSLEB128(FormVal->Value, OS);
             break;
           case dwarf::DW_FORM_udata:
           case dwarf::DW_FORM_ref_udata:
             encodeULEB128(FormVal->Value, OS);
             break;
           case dwarf::DW_FORM_string:
             OS.write(FormVal->CStr.data(), FormVal->CStr.size());
             OS.write('\0');
             break;
           case dwarf::DW_FORM_indirect:
             encodeULEB128(FormVal->Value, OS);
             Indirect = true;
             Form = static_cast<dwarf::Form>((uint64_t)FormVal->Value);
             ++FormVal;
             break;
           case dwarf::DW_FORM_strp:
           case dwarf::DW_FORM_sec_offset:
           case dwarf::DW_FORM_GNU_ref_alt:
           case dwarf::DW_FORM_GNU_strp_alt:
           case dwarf::DW_FORM_line_strp:
           case dwarf::DW_FORM_strp_sup:
           case dwarf::DW_FORM_ref_sup:
             // TODO: Handle DWARF32/64
             writeInteger((uint32_t)FormVal->Value, OS, DI.IsLittleEndian);
             break;
           case dwarf::DW_FORM_ref_sig8:
             writeInteger((uint64_t)FormVal->Value, OS, DI.IsLittleEndian);
             break;
           case dwarf::DW_FORM_GNU_addr_index:
           case dwarf::DW_FORM_GNU_str_index:
             encodeULEB128(FormVal->Value, OS);
             break;
           default:
             break;
           }
         } while (Indirect);
       }
     }
   }
 }

 void yaml2FileEntry(raw_ostream &OS, const DWARFYAML::File &File) {
   OS.write(File.Name.data(), File.Name.size());
   OS.write('\0');
   encodeULEB128(File.DirIdx, OS);
   encodeULEB128(File.ModTime, OS);
   encodeULEB128(File.Length, OS);
 }

 void yaml2debug_line(raw_ostream &OS, const DWARFYAML::Data &DI) {
   for (const auto LineTable : DI.DebugLines) {
     writeInteger((uint32_t)LineTable.TotalLength, OS, DI.IsLittleEndian);
     uint64_t SizeOfPrologueLength = 4;
     if (LineTable.TotalLength == UINT32_MAX) {
       writeInteger((uint64_t)LineTable.TotalLength64, OS, DI.IsLittleEndian);
       SizeOfPrologueLength = 8;
     }
     writeInteger((uint16_t)LineTable.Version, OS, DI.IsLittleEndian);
     writeVariableSizedInteger(LineTable.PrologueLength, SizeOfPrologueLength,
                               OS, DI.IsLittleEndian);
     writeInteger((uint8_t)LineTable.MinInstLength, OS, DI.IsLittleEndian);
     if (LineTable.Version >= 4)
       writeInteger((uint8_t)LineTable.MaxOpsPerInst, OS, DI.IsLittleEndian);
     writeInteger((uint8_t)LineTable.DefaultIsStmt, OS, DI.IsLittleEndian);
     writeInteger((uint8_t)LineTable.LineBase, OS, DI.IsLittleEndian);
     writeInteger((uint8_t)LineTable.LineRange, OS, DI.IsLittleEndian);
     writeInteger((uint8_t)LineTable.OpcodeBase, OS, DI.IsLittleEndian);

     for (auto OpcodeLength : LineTable.StandardOpcodeLengths)
       writeInteger((uint8_t)OpcodeLength, OS, DI.IsLittleEndian);

     for (auto IncludeDir : LineTable.IncludeDirs) {
       OS.write(IncludeDir.data(), IncludeDir.size());
       OS.write('\0');
     }
     OS.write('\0');

     for (auto File : LineTable.Files)
       yaml2FileEntry(OS, File);
     OS.write('\0');

     for (auto Op : LineTable.Opcodes) {
       writeInteger((uint8_t)Op.Opcode, OS, DI.IsLittleEndian);
       if (Op.Opcode == 0) {
         encodeULEB128(Op.ExtLen, OS);
         writeInteger((uint8_t)Op.SubOpcode, OS, DI.IsLittleEndian);
         switch (Op.SubOpcode) {
         case dwarf::DW_LNE_set_address:
         case dwarf::DW_LNE_set_discriminator:
           writeVariableSizedInteger(Op.Data, DI.CompileUnits[0].AddrSize, OS,
                                     DI.IsLittleEndian);
           break;
         case dwarf::DW_LNE_define_file:
           yaml2FileEntry(OS, Op.FileEntry);
           break;
         case dwarf::DW_LNE_end_sequence:
           break;
         default:
           for (auto OpByte : Op.UnknownOpcodeData)
             writeInteger((uint8_t)OpByte, OS, DI.IsLittleEndian);
         }
       } else if (Op.Opcode < LineTable.OpcodeBase) {
         switch (Op.Opcode) {
         case dwarf::DW_LNS_copy:
         case dwarf::DW_LNS_negate_stmt:
         case dwarf::DW_LNS_set_basic_block:
         case dwarf::DW_LNS_const_add_pc:
         case dwarf::DW_LNS_set_prologue_end:
         case dwarf::DW_LNS_set_epilogue_begin:
           break;

         case dwarf::DW_LNS_advance_pc:
         case dwarf::DW_LNS_set_file:
         case dwarf::DW_LNS_set_column:
         case dwarf::DW_LNS_set_isa:
           encodeULEB128(Op.Data, OS);
           break;

         case dwarf::DW_LNS_advance_line:
           encodeSLEB128(Op.SData, OS);
           break;

         case dwarf::DW_LNS_fixed_advance_pc:
           writeInteger((uint16_t)Op.Data, OS, DI.IsLittleEndian);
           break;

         default:
           for (auto OpData : Op.StandardOpcodeData) {
             encodeULEB128(OpData, OS);
           }
         }
       }
     }
   }
 }
	//===- yaml2dwarf - Convert YAML to DWARF binary data ---------------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	///
	/// \file
	/// \brief The DWARF component of yaml2obj.
	///
	//===----------------------------------------------------------------------===//

	#include "llvm/ObjectYAML/DWARFYAML.h"
	#include "llvm/Support/Error.h"
	#include "llvm/Support/LEB128.h"
	#include "llvm/Support/raw_ostream.h"
	#include "llvm/Support/SwapByteOrder.h"

	#include <algorithm>

	using namespace llvm;

	template <typename T>
	void writeInteger(T Integer, raw_ostream &OS, bool IsLittleEndian) {
	if (IsLittleEndian != sys::IsLittleEndianHost)
	sys::swapByteOrder(Integer);
	OS.write(reinterpret_cast<char *>(&Integer), sizeof(T));
	}

	void writeVariableSizedInteger(uint64_t Integer, size_t Size, raw_ostream &OS,
	bool IsLittleEndian) {
	if (8 == Size)
	writeInteger((uint64_t)Integer, OS, IsLittleEndian);
	else if (4 == Size)
	writeInteger((uint32_t)Integer, OS, IsLittleEndian);
	else if (2 == Size)
	writeInteger((uint16_t)Integer, OS, IsLittleEndian);
	else if (1 == Size)
	writeInteger((uint8_t)Integer, OS, IsLittleEndian);
	else
	assert(false && "Invalid integer write size.");
	}

	void ZeroFillBytes(raw_ostream &OS, size_t Size) {
	std::vector<uint8_t> FillData;
	FillData.insert(FillData.begin(), Size, 0);
	OS.write(reinterpret_cast<char *>(FillData.data()), Size);
	}

	void yaml2debug_str(raw_ostream &OS, const DWARFYAML::Data &DI) {
	for (auto Str : DI.DebugStrings) {
	OS.write(Str.data(), Str.size());
	OS.write('\0');
	}
	}

	void yaml2debug_abbrev(raw_ostream &OS, const DWARFYAML::Data &DI) {
	for (auto AbbrevDecl : DI.AbbrevDecls) {
	encodeULEB128(AbbrevDecl.Code, OS);
	encodeULEB128(AbbrevDecl.Tag, OS);
	OS.write(AbbrevDecl.Children);
	for (auto Attr : AbbrevDecl.Attributes) {
	encodeULEB128(Attr.Attribute, OS);
	encodeULEB128(Attr.Form, OS);
	}
	encodeULEB128(0, OS);
	encodeULEB128(0, OS);
	}
	}

	void yaml2debug_aranges(raw_ostream &OS, const DWARFYAML::Data &DI) {
	for (auto Range : DI.ARanges) {
	auto HeaderStart = OS.tell();
	writeInteger((uint32_t)Range.Length, OS, DI.IsLittleEndian);
	writeInteger((uint16_t)Range.Version, OS, DI.IsLittleEndian);
	writeInteger((uint32_t)Range.CuOffset, OS, DI.IsLittleEndian);
	writeInteger((uint8_t)Range.AddrSize, OS, DI.IsLittleEndian);
	writeInteger((uint8_t)Range.SegSize, OS, DI.IsLittleEndian);

	auto HeaderSize = OS.tell() - HeaderStart;
	auto FirstDescriptor = alignTo(HeaderSize, Range.AddrSize * 2);
	ZeroFillBytes(OS, FirstDescriptor - HeaderSize);

	for (auto Descriptor : Range.Descriptors) {
	writeVariableSizedInteger(Descriptor.Address, Range.AddrSize, OS,
	DI.IsLittleEndian);
	writeVariableSizedInteger(Descriptor.Length, Range.AddrSize, OS,
	DI.IsLittleEndian);
	}
	ZeroFillBytes(OS, Range.AddrSize * 2);
	}
	}

	void yaml2pubsection(raw_ostream &OS, const DWARFYAML::PubSection &Sect,
	bool IsLittleEndian) {
	writeInteger((uint32_t)Sect.Length, OS, IsLittleEndian);
	writeInteger((uint16_t)Sect.Version, OS, IsLittleEndian);
	writeInteger((uint32_t)Sect.UnitOffset, OS, IsLittleEndian);
	writeInteger((uint32_t)Sect.UnitSize, OS, IsLittleEndian);
	for (auto Entry : Sect.Entries) {
	writeInteger((uint32_t)Entry.DieOffset, OS, IsLittleEndian);
	if (Sect.IsGNUStyle)
	writeInteger((uint32_t)Entry.Descriptor, OS, IsLittleEndian);
	OS.write(Entry.Name.data(), Entry.Name.size());
	OS.write('\0');
	}
	}

	void yaml2debug_info(raw_ostream &OS, const DWARFYAML::Data &DI) {

	for (auto CU : DI.CompileUnits) {
	writeInteger((uint32_t)CU.Length, OS, DI.IsLittleEndian);
	writeInteger((uint16_t)CU.Version, OS, DI.IsLittleEndian);
	writeInteger((uint32_t)CU.AbbrOffset, OS, DI.IsLittleEndian);
	writeInteger((uint8_t)CU.AddrSize, OS, DI.IsLittleEndian);

	auto FirstAbbrevCode = CU.Entries[0].AbbrCode;

	for (auto Entry : CU.Entries) {
	encodeULEB128(Entry.AbbrCode, OS);
	if (Entry.AbbrCode == 0u)
	continue;
	bool Indirect = false;
	assert(Entry.AbbrCode - FirstAbbrevCode < DI.AbbrevDecls.size() &&
	"Out of range AbbCode");
	auto &Abbrev = DI.AbbrevDecls[Entry.AbbrCode - FirstAbbrevCode];

	auto FormVal = Entry.Values.begin();
	auto AbbrForm = Abbrev.Attributes.begin();
	for (;
	FormVal != Entry.Values.end() && AbbrForm != Abbrev.Attributes.end();
	++FormVal, ++AbbrForm) {
	dwarf::Form Form = AbbrForm->Form;
	do {
	Indirect = false;
	switch (Form) {
	case dwarf::DW_FORM_addr:
	writeVariableSizedInteger(FormVal->Value, CU.AddrSize, OS,
	DI.IsLittleEndian);
	break;
	case dwarf::DW_FORM_ref_addr: {
	// TODO: Handle DWARF32/DWARF64 after Line Table data is done
	auto writeSize = CU.Version == 2 ? CU.AddrSize : 4;
	writeVariableSizedInteger(FormVal->Value, writeSize, OS,
	DI.IsLittleEndian);
	break;
	}
	case dwarf::DW_FORM_exprloc:
	case dwarf::DW_FORM_block:
	encodeULEB128(FormVal->BlockData.size(), OS);
	OS.write(reinterpret_cast<char *>(&FormVal->BlockData[0]),
	FormVal->BlockData.size());
	break;
	case dwarf::DW_FORM_block1: {
	auto writeSize = FormVal->BlockData.size();
	writeInteger((uint8_t)writeSize, OS, DI.IsLittleEndian);
	OS.write(reinterpret_cast<char *>(&FormVal->BlockData[0]),
	FormVal->BlockData.size());
	break;
	}
	case dwarf::DW_FORM_block2: {
	auto writeSize = FormVal->BlockData.size();
	writeInteger((uint16_t)writeSize, OS, DI.IsLittleEndian);
	OS.write(reinterpret_cast<char *>(&FormVal->BlockData[0]),
	FormVal->BlockData.size());
	break;
	}
	case dwarf::DW_FORM_block4: {
	auto writeSize = FormVal->BlockData.size();
	writeInteger((uint32_t)writeSize, OS, DI.IsLittleEndian);
	OS.write(reinterpret_cast<char *>(&FormVal->BlockData[0]),
	FormVal->BlockData.size());
	break;
	}
	case dwarf::DW_FORM_data1:
	case dwarf::DW_FORM_ref1:
	case dwarf::DW_FORM_flag:
	writeInteger((uint8_t)FormVal->Value, OS, DI.IsLittleEndian);
	break;
	case dwarf::DW_FORM_data2:
	case dwarf::DW_FORM_ref2:
	writeInteger((uint16_t)FormVal->Value, OS, DI.IsLittleEndian);
	break;
	case dwarf::DW_FORM_data4:
	case dwarf::DW_FORM_ref4:
	writeInteger((uint32_t)FormVal->Value, OS, DI.IsLittleEndian);
	break;
	case dwarf::DW_FORM_data8:
	case dwarf::DW_FORM_ref8:
	writeInteger((uint64_t)FormVal->Value, OS, DI.IsLittleEndian);
	break;
	case dwarf::DW_FORM_sdata:
	encodeSLEB128(FormVal->Value, OS);
	break;
	case dwarf::DW_FORM_udata:
	case dwarf::DW_FORM_ref_udata:
	encodeULEB128(FormVal->Value, OS);
	break;
	case dwarf::DW_FORM_string:
	OS.write(FormVal->CStr.data(), FormVal->CStr.size());
	OS.write('\0');
	break;
	case dwarf::DW_FORM_indirect:
	encodeULEB128(FormVal->Value, OS);
	Indirect = true;
	Form = static_cast<dwarf::Form>((uint64_t)FormVal->Value);
	++FormVal;
	break;
	case dwarf::DW_FORM_strp:
	case dwarf::DW_FORM_sec_offset:
	case dwarf::DW_FORM_GNU_ref_alt:
	case dwarf::DW_FORM_GNU_strp_alt:
	case dwarf::DW_FORM_line_strp:
	case dwarf::DW_FORM_strp_sup:
	case dwarf::DW_FORM_ref_sup:
	// TODO: Handle DWARF32/64
	writeInteger((uint32_t)FormVal->Value, OS, DI.IsLittleEndian);
	break;
	case dwarf::DW_FORM_ref_sig8:
	writeInteger((uint64_t)FormVal->Value, OS, DI.IsLittleEndian);
	break;
	case dwarf::DW_FORM_GNU_addr_index:
	case dwarf::DW_FORM_GNU_str_index:
	encodeULEB128(FormVal->Value, OS);
	break;
	default:
	break;
	}
	} while (Indirect);
	}
	}
	}
	}

	void yaml2FileEntry(raw_ostream &OS, const DWARFYAML::File &File) {
	OS.write(File.Name.data(), File.Name.size());
	OS.write('\0');
	encodeULEB128(File.DirIdx, OS);
	encodeULEB128(File.ModTime, OS);
	encodeULEB128(File.Length, OS);
	}

	void yaml2debug_line(raw_ostream &OS, const DWARFYAML::Data &DI) {
	for (const auto LineTable : DI.DebugLines) {
	writeInteger((uint32_t)LineTable.TotalLength, OS, DI.IsLittleEndian);
	uint64_t SizeOfPrologueLength = 4;
	if (LineTable.TotalLength == UINT32_MAX) {
	writeInteger((uint64_t)LineTable.TotalLength64, OS, DI.IsLittleEndian);
	SizeOfPrologueLength = 8;
	}
	writeInteger((uint16_t)LineTable.Version, OS, DI.IsLittleEndian);
	writeVariableSizedInteger(LineTable.PrologueLength, SizeOfPrologueLength,
	OS, DI.IsLittleEndian);
	writeInteger((uint8_t)LineTable.MinInstLength, OS, DI.IsLittleEndian);
	if (LineTable.Version >= 4)
	writeInteger((uint8_t)LineTable.MaxOpsPerInst, OS, DI.IsLittleEndian);
	writeInteger((uint8_t)LineTable.DefaultIsStmt, OS, DI.IsLittleEndian);
	writeInteger((uint8_t)LineTable.LineBase, OS, DI.IsLittleEndian);
	writeInteger((uint8_t)LineTable.LineRange, OS, DI.IsLittleEndian);
	writeInteger((uint8_t)LineTable.OpcodeBase, OS, DI.IsLittleEndian);

	for (auto OpcodeLength : LineTable.StandardOpcodeLengths)
	writeInteger((uint8_t)OpcodeLength, OS, DI.IsLittleEndian);

	for (auto IncludeDir : LineTable.IncludeDirs) {
	OS.write(IncludeDir.data(), IncludeDir.size());
	OS.write('\0');
	}
	OS.write('\0');

	for (auto File : LineTable.Files)
	yaml2FileEntry(OS, File);
	OS.write('\0');

	for (auto Op : LineTable.Opcodes) {
	writeInteger((uint8_t)Op.Opcode, OS, DI.IsLittleEndian);
	if (Op.Opcode == 0) {
	encodeULEB128(Op.ExtLen, OS);
	writeInteger((uint8_t)Op.SubOpcode, OS, DI.IsLittleEndian);
	switch (Op.SubOpcode) {
	case dwarf::DW_LNE_set_address:
	case dwarf::DW_LNE_set_discriminator:
	writeVariableSizedInteger(Op.Data, DI.CompileUnits[0].AddrSize, OS,
	DI.IsLittleEndian);
	break;
	case dwarf::DW_LNE_define_file:
	yaml2FileEntry(OS, Op.FileEntry);
	break;
	case dwarf::DW_LNE_end_sequence:
	break;
	default:
	for (auto OpByte : Op.UnknownOpcodeData)
	writeInteger((uint8_t)OpByte, OS, DI.IsLittleEndian);
	}
	} else if (Op.Opcode < LineTable.OpcodeBase) {
	switch (Op.Opcode) {
	case dwarf::DW_LNS_copy:
	case dwarf::DW_LNS_negate_stmt:
	case dwarf::DW_LNS_set_basic_block:
	case dwarf::DW_LNS_const_add_pc:
	case dwarf::DW_LNS_set_prologue_end:
	case dwarf::DW_LNS_set_epilogue_begin:
	break;

	case dwarf::DW_LNS_advance_pc:
	case dwarf::DW_LNS_set_file:
	case dwarf::DW_LNS_set_column:
	case dwarf::DW_LNS_set_isa:
	encodeULEB128(Op.Data, OS);
	break;

	case dwarf::DW_LNS_advance_line:
	encodeSLEB128(Op.SData, OS);
	break;

	case dwarf::DW_LNS_fixed_advance_pc:
	writeInteger((uint16_t)Op.Data, OS, DI.IsLittleEndian);
	break;

	default:
	for (auto OpData : Op.StandardOpcodeData) {
	encodeULEB128(OpData, OS);
	}
	}
	}
	}
	}
	}