Index: llvm/include/llvm/BinaryFormat/GOFF.h
===================================================================
--- llvm/include/llvm/BinaryFormat/GOFF.h
+++ llvm/include/llvm/BinaryFormat/GOFF.h
@@ -25,6 +25,14 @@
 constexpr uint8_t RecordPrefixLength = 3;
 constexpr uint8_t PayloadLength = 77;
 
+/// \brief Maximum data length before starting a new card for RLD and TXT data.
+///
+/// The maximum number of bytes that can be included in an RLD or TXT record and
+/// their continuations is a SIGNED 16 bit int despite what the spec says. The
+/// number of bytes we allow ourselves to attach to a card is thus arbitrarily
+/// limited to 32K-1 bytes.
+constexpr uint16_t MaxDataLength = 32 * 1024 - 1;
+
 // Prefix byte on every record. This indicates GOFF format.
 constexpr uint8_t PTVPrefix = 0x03;
 
@@ -144,6 +152,33 @@
   ESD_ALIGN_4Kpage = 12,
 };
 
+enum TXTRecordStyle : uint8_t {
+  TXT_RS_Byte = 0,
+  TXT_RS_Structured = 1,
+  TXT_RS_Unstructured = 2,
+};
+
+enum RLDReferenceType : uint8_t {
+  RLD_RT_RAddress = 0,
+  RLD_RT_ROffset = 1,
+  RLD_RT_RLength = 2,
+  RLD_RT_RRelativeImmediate = 6,
+  RLD_RT_RTypeConstant = 7, // XPLink ADA
+  RLD_RT_RLongDisplacement = 9,
+};
+
+enum RLDReferentType : uint8_t {
+  RLD_RO_Label = 0,
+  RLD_RO_Element = 1,
+  RLD_RO_Class = 2,
+  RLD_RO_Part = 3,
+};
+
+enum RLDAction : uint8_t {
+  RLD_ACT_Add = 0,
+  RLD_ACT_Subtract = 1,
+};
+
 enum ENDEntryPointRequest : uint8_t {
   END_EPR_None = 0,
   END_EPR_EsdidOffset = 1,
Index: llvm/include/llvm/ObjectYAML/GOFFYAML.h
===================================================================
--- /dev/null
+++ llvm/include/llvm/ObjectYAML/GOFFYAML.h
@@ -0,0 +1,245 @@
+//===- GOFFYAML.h - GOFF YAMLIO implementation ------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares classes for handling the YAML representation of GOFF.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_OBJECTYAML_GOFFYAML_H
+#define LLVM_OBJECTYAML_GOFFYAML_H
+
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/BinaryFormat/GOFF.h"
+#include "llvm/ObjectYAML/YAML.h"
+#include <cstdint>
+#include <vector>
+
+namespace llvm {
+
+namespace GOFF {
+
+enum ESDFlags {
+  ESD_FillByteValuePresent = 1 << 7,
+  ESD_SymbolDisplayFlag = 1 << 6,
+  ESD_SymbolRenamingFlag = 1 << 5,
+  ESD_RemovableClass = 1 << 4
+};
+
+enum {
+  ESD_Mask_ERST = 0x07,
+  ESD_Mask_RQW = 0x07,
+  ESD_Mask_TextStyle = 0xf0,
+  ESD_Mask_BindingAlgorithm = 0x0f,
+};
+
+enum ESDBAFlags {
+  ESD_BA_Movable = 0x01,
+  ESD_BA_ReadOnly = 0x2,
+  ESD_BA_NoPrime = 0x4,
+  ESD_BA_COMMON = 0x8,
+  ESD_BA_Indirect = 0x10,
+};
+
+enum RLDFlags {
+  RLD_Same_RID = 0x80,
+  RLD_Same_PID = 0x40,
+  RLD_Same_Offset = 0x20,
+  RLD_EA_Present = 0x04,
+  RLD_Offset_Length = 0x02,
+  RLD_Adressing_Mode_Sensitivity = 0x01,
+  RLD_FetchStore = 0x100,
+};
+
+} // end namespace GOFF
+
+// The structure of the yaml files is not an exact 1:1 match to GOFF. In order
+// to use yaml::IO, we use these structures which are closer to the source.
+namespace GOFFYAML {
+
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDSYMBOLTYPE)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDNAMESPACEID)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDFlags)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDAMODE)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDRMODE)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDTEXTSTYLE)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDBINDINGALGORITHM)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDTASKINGBEHAVIOR)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDEXECUTABLE)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDLINKAGETYPE)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDBINDINGSTRENGTH)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDLOADINGBEHAVIOR)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDBINDINGSCOPE)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_ESDALIGNMENT)
+LLVM_YAML_STRONG_TYPEDEF(uint64_t, GOFF_BAFLAGS)
+
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_TEXTRECORDSTYLE)
+
+LLVM_YAML_STRONG_TYPEDEF(uint16_t, GOFF_RLDFLAGS)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_RLDREFERENCETYPE)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_RLDREFERENTTYPE)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, GOFF_RLDACTION)
+
+struct RecordBase {
+  enum RecordBaseKind { RBK_Relocations, RBK_Symbol, RBK_Section };
+
+private:
+  const RecordBaseKind Kind;
+
+protected:
+  RecordBase(RecordBaseKind Kind) : Kind(Kind) {}
+
+public:
+  RecordBaseKind getKind() const { return Kind; }
+};
+typedef std::unique_ptr<RecordBase> RecordPtr;
+
+struct Relocation {
+  GOFF_RLDFLAGS Flags;
+  GOFF_RLDREFERENCETYPE ReferenceType;
+  GOFF_RLDREFERENTTYPE ReferentType;
+  GOFF_RLDACTION Action;
+  uint32_t RPointer;
+  uint32_t PPointer;
+  uint64_t Offset;
+  uint32_t ExtAttrID;
+  uint32_t ExtAttrOffset;
+  uint8_t TargetFieldByteLength;
+  uint8_t BitLength;
+  uint8_t BitOffset;
+};
+
+struct Relocations : public RecordBase {
+  Relocations() : RecordBase(RBK_Relocations) {}
+
+  std::vector<Relocation> Relocs;
+
+  static bool classof(const RecordBase *Rec) {
+    return Rec->getKind() == RBK_Relocations;
+  }
+};
+
+struct Section : public RecordBase {
+  Section() : RecordBase(RBK_Section) {}
+
+  StringRef SymbolName;
+  uint32_t SymbolID;
+  uint32_t Offset;
+  uint32_t TrueLength;
+  uint16_t TextEncoding;
+  uint16_t DataLength;
+  GOFF_TEXTRECORDSTYLE TextStyle;
+
+  Optional<yaml::BinaryRef> Data;
+
+  static bool classof(const RecordBase *Rec) {
+    return Rec->getKind() == RBK_Section;
+  }
+};
+
+struct Symbol : public RecordBase {
+  Symbol() : RecordBase(RBK_Symbol) {}
+
+  StringRef Name;
+  GOFF_ESDSYMBOLTYPE Type;
+  uint32_t ID;
+  uint32_t OwnerID;
+  uint32_t Address;
+  uint32_t Length;
+  uint32_t ExtAttrID;
+  uint32_t ExtAttrOffset;
+  GOFF_ESDNAMESPACEID NameSpace;
+  GOFF_ESDFlags Flags;
+  uint8_t FillByteValue;
+  uint32_t PSectID;
+  uint32_t Priority;
+  Optional<llvm::yaml::Hex64> Signature;
+  GOFF_ESDAMODE Amode;
+  GOFF_ESDRMODE Rmode;
+  GOFF_ESDTEXTSTYLE TextStyle;
+  GOFF_ESDBINDINGALGORITHM BindingAlgorithm;
+  GOFF_ESDTASKINGBEHAVIOR TaskingBehavior;
+  GOFF_ESDEXECUTABLE Executable;
+  GOFF_ESDLINKAGETYPE LinkageType;
+  GOFF_ESDBINDINGSTRENGTH BindingStrength;
+  GOFF_ESDLOADINGBEHAVIOR LoadingBehavior;
+  GOFF_ESDBINDINGSCOPE BindingScope;
+  GOFF_ESDALIGNMENT Alignment;
+  GOFF_BAFLAGS BAFlags;
+
+  static bool classof(const RecordBase *Rec) {
+    return Rec->getKind() == RBK_Symbol;
+  }
+};
+
+struct FileHeader {
+  uint32_t TargetEnvironment;
+  uint32_t TargetOperatingSystem;
+  uint16_t CCSID;
+  StringRef CharacterSetName;
+  StringRef LanguageProductIdentifier;
+  uint32_t ArchitectureLevel;
+  Optional<uint16_t> InternalCCSID;
+  Optional<uint8_t> TargetSoftwareEnvironment;
+};
+
+struct Object {
+  FileHeader Header;
+  std::vector<RecordPtr> Records;
+
+  Object();
+};
+
+} // end namespace GOFFYAML
+
+} // end namespace llvm
+
+LLVM_YAML_IS_SEQUENCE_VECTOR(GOFFYAML::Relocation)
+LLVM_YAML_IS_SEQUENCE_VECTOR(GOFFYAML::RecordPtr)
+
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDSYMBOLTYPE)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDNAMESPACEID)
+LLVM_YAML_DECLARE_BITSET_TRAITS(GOFFYAML::GOFF_ESDFlags)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDAMODE)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDRMODE)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDTEXTSTYLE)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDBINDINGALGORITHM)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDTASKINGBEHAVIOR)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDEXECUTABLE)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDLINKAGETYPE)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDBINDINGSTRENGTH)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDLOADINGBEHAVIOR)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDBINDINGSCOPE)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_ESDALIGNMENT)
+LLVM_YAML_DECLARE_BITSET_TRAITS(GOFFYAML::GOFF_BAFLAGS)
+
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_TEXTRECORDSTYLE)
+
+LLVM_YAML_DECLARE_BITSET_TRAITS(GOFFYAML::GOFF_RLDFLAGS)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_RLDREFERENCETYPE)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_RLDREFERENTTYPE)
+LLVM_YAML_DECLARE_ENUM_TRAITS(GOFFYAML::GOFF_RLDACTION)
+
+LLVM_YAML_DECLARE_MAPPING_TRAITS(GOFFYAML::Relocation)
+LLVM_YAML_DECLARE_MAPPING_TRAITS(GOFFYAML::Section)
+LLVM_YAML_DECLARE_MAPPING_TRAITS(GOFFYAML::Symbol)
+LLVM_YAML_DECLARE_MAPPING_TRAITS(GOFFYAML::FileHeader)
+LLVM_YAML_DECLARE_MAPPING_TRAITS(GOFFYAML::Object)
+
+namespace llvm {
+namespace yaml {
+
+template <> struct CustomMappingTraits<GOFFYAML::RecordPtr> {
+  static void inputOne(IO &IO, StringRef Key, GOFFYAML::RecordPtr &Elem);
+  static void output(IO &IO, GOFFYAML::RecordPtr &Elem);
+};
+
+} // end namespace yaml
+} // end namespace llvm
+
+#endif // LLVM_OBJECTYAML_GOFFYAML_H
Index: llvm/include/llvm/ObjectYAML/ObjectYAML.h
===================================================================
--- llvm/include/llvm/ObjectYAML/ObjectYAML.h
+++ llvm/include/llvm/ObjectYAML/ObjectYAML.h
@@ -13,6 +13,7 @@
 #include "llvm/ObjectYAML/COFFYAML.h"
 #include "llvm/ObjectYAML/DXContainerYAML.h"
 #include "llvm/ObjectYAML/ELFYAML.h"
+#include "llvm/ObjectYAML/GOFFYAML.h"
 #include "llvm/ObjectYAML/MachOYAML.h"
 #include "llvm/ObjectYAML/MinidumpYAML.h"
 #include "llvm/ObjectYAML/OffloadYAML.h"
@@ -30,6 +31,7 @@
   std::unique_ptr<ArchYAML::Archive> Arch;
   std::unique_ptr<ELFYAML::Object> Elf;
   std::unique_ptr<COFFYAML::Object> Coff;
+  std::unique_ptr<GOFFYAML::Object> Goff;
   std::unique_ptr<MachOYAML::Object> MachO;
   std::unique_ptr<MachOYAML::UniversalBinary> FatMachO;
   std::unique_ptr<MinidumpYAML::Object> Minidump;
Index: llvm/include/llvm/ObjectYAML/yaml2obj.h
===================================================================
--- llvm/include/llvm/ObjectYAML/yaml2obj.h
+++ llvm/include/llvm/ObjectYAML/yaml2obj.h
@@ -32,6 +32,10 @@
 struct Object;
 }
 
+namespace GOFFYAML {
+struct Object;
+}
+
 namespace MinidumpYAML {
 struct Object;
 }
@@ -64,6 +68,7 @@
 
 bool yaml2archive(ArchYAML::Archive &Doc, raw_ostream &Out, ErrorHandler EH);
 bool yaml2coff(COFFYAML::Object &Doc, raw_ostream &Out, ErrorHandler EH);
+bool yaml2goff(GOFFYAML::Object &Doc, raw_ostream &Out, ErrorHandler EH);
 bool yaml2elf(ELFYAML::Object &Doc, raw_ostream &Out, ErrorHandler EH,
               uint64_t MaxSize);
 bool yaml2macho(YamlObjectFile &Doc, raw_ostream &Out, ErrorHandler EH);
Index: llvm/lib/ObjectYAML/CMakeLists.txt
===================================================================
--- llvm/lib/ObjectYAML/CMakeLists.txt
+++ llvm/lib/ObjectYAML/CMakeLists.txt
@@ -13,6 +13,8 @@
   DXContainerYAML.cpp
   ELFEmitter.cpp
   ELFYAML.cpp
+  GOFFEmitter.cpp
+  GOFFYAML.cpp
   MachOEmitter.cpp
   MachOYAML.cpp
   ObjectYAML.cpp
Index: llvm/lib/ObjectYAML/GOFFEmitter.cpp
===================================================================
--- /dev/null
+++ llvm/lib/ObjectYAML/GOFFEmitter.cpp
@@ -0,0 +1,450 @@
+//===- yaml2goff - Convert YAML to a GOFF object file ---------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// The GOFF component of yaml2obj.
+///
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/IndexedMap.h"
+#include "llvm/ObjectYAML/ObjectYAML.h"
+#include "llvm/ObjectYAML/yaml2obj.h"
+#include "llvm/Support/ConvertEBCDIC.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+namespace {
+
+static const uint8_t TXTMaxDataLength = 56;
+
+// Common flag values on records.
+enum {
+  // Flag: This record is continued.
+  Rec_Continued = 1 << (8 - 7 - 1),
+
+  // Flag: This record is a continuation.
+  Rec_Continuation = 1 << (8 - 6 - 1),
+};
+
+template <typename value_type> struct BinaryBeImpl {
+  value_type Value;
+  BinaryBeImpl(value_type V) : Value(V) {}
+};
+
+template <typename value_type>
+raw_ostream &operator<<(raw_ostream &OS, const BinaryBeImpl<value_type> &BBE) {
+  char Buffer[sizeof(BBE.Value)];
+  support::endian::write<value_type, support::big, support::unaligned>(
+      Buffer, BBE.Value);
+  OS.write(Buffer, sizeof(BBE.Value));
+  return OS;
+}
+
+template <typename value_type> BinaryBeImpl<value_type> binaryBe(value_type V) {
+  return BinaryBeImpl<value_type>(V);
+}
+
+struct ZerosImpl {
+  size_t NumBytes;
+};
+
+raw_ostream &operator<<(raw_ostream &OS, const ZerosImpl &Z) {
+  OS.write_zeros(Z.NumBytes);
+  return OS;
+}
+
+ZerosImpl zeros(const size_t NumBytes) { return ZerosImpl{NumBytes}; }
+
+raw_ostream &operator<<(raw_ostream &OS, const yaml::BinaryRef &Data) {
+  Data.writeAsBinary(OS);
+  return OS;
+}
+
+// The GOFFOstream is responsible to write the data into the fixed physical
+// records of the format. A user of this class announces the the begin of a new
+// logical record and the size of its payload. While writing the payload, the
+// physical records are created for the data. Possible fill bytes at the end of
+// a physical record are written automatically.
+class GOFFOstream : public raw_ostream {
+  /// The underlying raw_ostream.
+  raw_ostream &OS;
+
+  /// The number of logical records emitted to far.
+  uint32_t LogicalRecords;
+
+  /// The remaining size of this logical record, including fill
+  /// bytes.
+  size_t RemainingSize;
+
+  /// The type of the current (logical) record.
+  GOFF::RecordType CurrentType;
+
+  /// Signals begin of new record.
+  bool NewLogicalRecord;
+
+  // Return the number of bytes left to write until next physical record.
+  // Please note that we maintain the total numbers of byte left, not the
+  // written size.
+  size_t bytesToNextPhysicalRecord() {
+    size_t Bytes = RemainingSize % GOFF::PayloadLength;
+    return Bytes ? Bytes : GOFF::PayloadLength;
+  }
+
+  /// Write the record prefix of a physical record, using the current record
+  /// type.
+  static void writeRecordPrefix(raw_ostream &OS, GOFF::RecordType Type,
+                                size_t RemainingSize,
+                                uint8_t Flags = Rec_Continuation);
+
+  /// Fill the last physical record of a logical record with zero bytes.
+  void fillRecord();
+
+  /// See raw_ostream::write_impl.
+  void write_impl(const char *Ptr, size_t Size) override;
+
+  /// Return the current position within the stream, not counting the bytes
+  /// currently in the buffer.
+  uint64_t current_pos() const override { return OS.tell(); }
+
+public:
+  explicit GOFFOstream(raw_ostream &OS)
+      : OS(OS), LogicalRecords(0), RemainingSize(0), NewLogicalRecord(false) {
+    SetBufferSize(GOFF::PayloadLength);
+  }
+
+  ~GOFFOstream() { finalize(); }
+
+  void newRecord(GOFF::RecordType Type, size_t Size);
+
+  void finalize() { fillRecord(); }
+
+  uint32_t logicalRecords() { return LogicalRecords; }
+};
+
+void GOFFOstream::writeRecordPrefix(raw_ostream &OS, GOFF::RecordType Type,
+                                    size_t RemainingSize, uint8_t Flags) {
+  uint8_t TypeAndFlags = Flags | (Type << 4);
+  if (RemainingSize > GOFF::RecordLength)
+    TypeAndFlags |= Rec_Continued;
+  OS << binaryBe(static_cast<unsigned char>(GOFF::PTVPrefix))
+     << binaryBe(static_cast<unsigned char>(TypeAndFlags))
+     << binaryBe(static_cast<unsigned char>(0));
+}
+
+void GOFFOstream::newRecord(GOFF::RecordType Type, size_t Size) {
+  fillRecord();
+  CurrentType = Type;
+  RemainingSize = Size;
+  if (size_t Gap = (RemainingSize % GOFF::PayloadLength))
+    RemainingSize += GOFF::PayloadLength - Gap;
+  NewLogicalRecord = true;
+  ++LogicalRecords;
+}
+
+void GOFFOstream::fillRecord() {
+  assert((GetNumBytesInBuffer() <= RemainingSize) &&
+         "More bytes in buffer than expected");
+  size_t Remains = RemainingSize - GetNumBytesInBuffer();
+  if (Remains) {
+    assert((Remains < GOFF::RecordLength) &&
+           "Attempt to fill more than one physical record");
+    raw_ostream::write_zeros(Remains);
+  }
+  flush();
+  assert(RemainingSize == 0 && "Not fully flushed");
+  assert(GetNumBytesInBuffer() == 0 && "Buffer not fully empty");
+}
+
+void GOFFOstream::write_impl(const char *Ptr, size_t Size) {
+  assert((RemainingSize >= Size) && "Attempt to write too much data");
+  assert(RemainingSize && "Logical record overflow");
+  if (!(RemainingSize % GOFF::PayloadLength)) {
+    writeRecordPrefix(OS, CurrentType, RemainingSize,
+                      NewLogicalRecord ? 0 : Rec_Continuation);
+    NewLogicalRecord = false;
+  }
+  assert(!NewLogicalRecord &&
+         "New logical record not on physical record boundary");
+
+  size_t Idx = 0;
+  while (Size > 0) {
+    size_t BytesToWrite = bytesToNextPhysicalRecord();
+    if (BytesToWrite > Size)
+      BytesToWrite = Size;
+    OS.write(Ptr + Idx, BytesToWrite);
+    Idx += BytesToWrite;
+    Size -= BytesToWrite;
+    RemainingSize -= BytesToWrite;
+    if (Size) {
+      writeRecordPrefix(OS, CurrentType, RemainingSize);
+    }
+  }
+}
+
+class GOFFState {
+  void writeHeader(GOFFYAML::FileHeader &FileHdr);
+  void writeEnd();
+  void writeSymbol(GOFFYAML::Symbol Sym);
+  void writeSection(GOFFYAML::Section Sec);
+  void writeRelocationDirectory(GOFFYAML::Relocations Rel);
+
+  void reportError(const Twine &Msg) {
+    ErrHandler(Msg);
+    HasError = true;
+  }
+
+  GOFFState(raw_ostream &OS, GOFFYAML::Object &Doc,
+            yaml::ErrorHandler ErrHandler)
+      : GW(OS), Doc(Doc), ErrHandler(ErrHandler), SymbolID(0), HasError(false) {
+  }
+
+  ~GOFFState() { GW.finalize(); }
+
+  bool writeObject();
+
+public:
+  static bool writeGOFF(raw_ostream &OS, GOFFYAML::Object &Doc,
+                        yaml::ErrorHandler ErrHandler);
+
+private:
+  GOFFOstream GW;
+  GOFFYAML::Object &Doc;
+  yaml::ErrorHandler ErrHandler;
+  uint16_t SymbolID;
+  bool HasError;
+};
+
+void GOFFState::writeHeader(GOFFYAML::FileHeader &FileHdr) {
+  SmallString<16> CCSIDName;
+  if (std::error_code EC =
+          ConverterEBCDIC::convertToEBCDIC(FileHdr.CharacterSetName, CCSIDName))
+    reportError("Conversion error on " + FileHdr.CharacterSetName);
+  if (CCSIDName.size() > 16) {
+    reportError("CharacterSetName too long");
+    CCSIDName.resize(16);
+  }
+  SmallString<16> LangProd;
+  if (std::error_code EC = ConverterEBCDIC::convertToEBCDIC(
+          FileHdr.LanguageProductIdentifier, LangProd))
+    reportError("Conversion error on " + FileHdr.LanguageProductIdentifier);
+  if (LangProd.size() > 16) {
+    reportError("LanguageProductIdentifier too long");
+    LangProd.resize(16);
+  }
+
+  GW.newRecord(GOFF::RT_HDR, GOFF::PayloadLength);
+  GW << binaryBe(FileHdr.TargetEnvironment)     // TargetEnvironment
+     << binaryBe(FileHdr.TargetOperatingSystem) // TargetOperatingSystem
+     << zeros(2)                                // Reserved
+     << binaryBe(FileHdr.CCSID)                 // CCSID
+     << CCSIDName                               // CharacterSetName
+     << zeros(16 - CCSIDName.size())            // Fill bytes
+     << LangProd                                // LanguageProductIdentifier
+     << zeros(16 - LangProd.size())             // Fill bytes
+     << binaryBe(FileHdr.ArchitectureLevel);    // ArchitectureLevel
+  // The module propties are optional. Figure out if we need to write them
+  uint16_t ModPropLen = 0;
+  if (FileHdr.TargetSoftwareEnvironment)
+    ModPropLen = 3;
+  else if (FileHdr.InternalCCSID)
+    ModPropLen = 2;
+  if (ModPropLen) {
+    GW << binaryBe(ModPropLen) << zeros(6);
+    if (ModPropLen >= 2)
+      GW << binaryBe(FileHdr.InternalCCSID ? *FileHdr.InternalCCSID : 0);
+    if (ModPropLen >= 3)
+      GW << binaryBe(FileHdr.TargetSoftwareEnvironment
+                         ? *FileHdr.TargetSoftwareEnvironment
+                         : 0);
+  }
+}
+
+void GOFFState::writeSymbol(GOFFYAML::Symbol Sym) {
+  if (Sym.ID != SymbolID + 1)
+    reportError("Symbol IDs not monoton " + Sym.Name);
+  else
+    ++SymbolID;
+  if (Sym.OwnerID >= SymbolID)
+    reportError("Owner ID not defined " + Sym.Name);
+  SmallString<80> SymName;
+  if (std::error_code EC = ConverterEBCDIC::convertToEBCDIC(Sym.Name, SymName))
+    reportError("Conversion error on " + Sym.Name);
+  size_t SymLength = SymName.size();
+  if (SymLength > GOFF::MaxDataLength)
+    reportError("Symbol name is too long: " + Twine(SymLength));
+
+  GW.newRecord(GOFF::RT_ESD, 69 + SymLength);
+  GW << binaryBe(Sym.Type)          // Symbol type
+     << binaryBe(Sym.ID)            // ESDID
+     << binaryBe(Sym.OwnerID)       // Owner ESDID
+     << binaryBe(uint32_t(0))       // Reserved
+     << binaryBe(Sym.Address)       // Offset/Address
+     << binaryBe(uint32_t(0))       // Reserved
+     << binaryBe(Sym.Length)        // Length
+     << binaryBe(Sym.ExtAttrID)     // Extended attributes
+     << binaryBe(Sym.ExtAttrOffset) // Extended attributes data offset
+     << binaryBe(uint32_t(0))       // Reserved
+     << binaryBe(Sym.NameSpace)     // Namespace ID
+     << binaryBe(Sym.Flags)         // Flags
+     << binaryBe(Sym.FillByteValue) // Fill byte value
+     << binaryBe(uint8_t(0))        // Reserved
+     << binaryBe(Sym.PSectID)       // PSECT ID
+     << binaryBe(Sym.Priority);     // Priority
+  if (Sym.Signature)
+    GW << *Sym.Signature; // Signature
+  else
+    GW << zeros(8);
+#define BIT(E, N) (Sym.BAFlags & GOFF::E ? 1 << (7 - N) : 0)
+  GW << binaryBe(Sym.Amode) // Behavioral attributes - Amode
+     << binaryBe(Sym.Rmode) // Behavioral attributes - Rmode
+     << binaryBe(uint8_t(Sym.TextStyle << 4 | Sym.BindingAlgorithm))
+     << binaryBe(uint8_t(Sym.TaskingBehavior << 5 | BIT(ESD_BA_Movable, 3) |
+                         BIT(ESD_BA_ReadOnly, 4) | Sym.Executable))
+     << binaryBe(uint8_t(BIT(ESD_BA_NoPrime, 1) | Sym.BindingStrength))
+     << binaryBe(uint8_t(Sym.LoadingBehavior << 6 | BIT(ESD_BA_COMMON, 2) |
+                         BIT(ESD_BA_Indirect, 3) | Sym.BindingScope))
+     << binaryBe(uint8_t(Sym.LinkageType << 5 | Sym.Alignment))
+     << zeros(3) // Behavioral attributes - Reserved
+     << binaryBe(static_cast<uint16_t>(SymLength)) // Name length
+     << SymName.str();
+#undef BIT
+}
+
+void GOFFState::writeSection(GOFFYAML::Section Sec) {
+  if (Sec.SymbolID == 0 || Sec.SymbolID > SymbolID)
+    reportError("Section symbol not defined: " + Twine(Sec.SymbolID));
+
+  size_t Size = 0;
+  if (Sec.Data) {
+    Size = Sec.Data->binary_size();
+    if (Size > GOFF::MaxDataLength) {
+      reportError("Section content is too long: " + Twine(Size));
+      return;
+    }
+    if (Sec.DataLength && Sec.DataLength != Size) {
+      reportError("Section content length " + Twine(Size) +
+                  " does not match data length " + Twine(Sec.DataLength));
+      return;
+    }
+  } else
+    Size = Sec.DataLength;
+
+  GW.newRecord(GOFF::RT_TXT, GOFF::PayloadLength - TXTMaxDataLength + Size);
+  GW << binaryBe(Sec.TextStyle)                // Text Record Style
+     << binaryBe(Sec.SymbolID)                 // Element ESDID
+     << binaryBe(uint32_t(0))                  // Reserved
+     << binaryBe(Sec.Offset)                   // Offset
+     << binaryBe(Sec.TrueLength)               // Text Field True Length
+     << binaryBe(Sec.TextEncoding)             // Text Encoding
+     << binaryBe(static_cast<uint16_t>(Size)); // Data Length
+  if (Sec.Data)
+    GW << *Sec.Data; // Data
+  else
+    GW << zeros(Size);
+}
+
+void GOFFState::writeRelocationDirectory(GOFFYAML::Relocations Rels) {
+  size_t Size = 0;
+  for (auto &Rel : Rels.Relocs) {
+    Size += 8;
+    if (!(Rel.Flags & GOFF::RLD_Same_RID))
+      Size += 4;
+    if (!(Rel.Flags & GOFF::RLD_Same_PID))
+      Size += 4;
+    if (!(Rel.Flags & GOFF::RLD_Same_Offset)) {
+      if (Rel.Flags & GOFF::RLD_Offset_Length)
+        Size += 8;
+      else
+        Size += 4;
+    }
+    if (Rel.Flags & GOFF::RLD_EA_Present)
+      Size += 8;
+  }
+  if (Size > 0xffffULL) {
+    reportError("Relocation directory is too large: " + Twine(Size));
+    return;
+  }
+
+  GW.newRecord(GOFF::RT_RLD, Size + 3);
+  GW << binaryBe(uint8_t(0))      // Reserved
+     << binaryBe(uint16_t(Size)); // Length of relocation data
+  for (auto &Rel : Rels.Relocs) {
+    GW << binaryBe(uint8_t(Rel.Flags)) // Flags, byte 1
+       << binaryBe(uint8_t(Rel.ReferenceType << 4 | Rel.ReferentType)) //
+       << binaryBe(uint8_t(Rel.Action << 1 | (Rel.Flags >> 8)))        //
+       << zeros(1)                                              // Reserved
+       << binaryBe(Rel.TargetFieldByteLength)                   //
+       << binaryBe(uint8_t(Rel.BitLength << 4 | Rel.BitOffset)) //
+       << zeros(2);                                             // Reserved
+    if (!(Rel.Flags & GOFF::RLD_Same_RID))
+      GW << binaryBe(Rel.RPointer);
+    if (!(Rel.Flags & GOFF::RLD_Same_PID))
+      GW << binaryBe(Rel.PPointer);
+    if (!(Rel.Flags & GOFF::RLD_Same_Offset)) {
+      if (Rel.Flags & GOFF::RLD_Offset_Length)
+        GW << binaryBe(Rel.Offset);
+      else
+        GW << binaryBe(static_cast<uint32_t>(Rel.Offset));
+    }
+    if (Rel.Flags & GOFF::RLD_EA_Present) {
+      GW << binaryBe(Rel.ExtAttrID);
+      GW << binaryBe(Rel.ExtAttrOffset);
+    }
+  }
+}
+
+void GOFFState::writeEnd() {
+  GW.newRecord(GOFF::RT_END, GOFF::PayloadLength);
+  GW << binaryBe(uint8_t(0)) // No entry point
+     << binaryBe(uint8_t(0)) // No AMODE
+     << zeros(3)             // Reserved
+     << binaryBe(GW.logicalRecords());
+  // No entry point yet. Automatically fill remaining space with zero bytes.
+  GW.finalize();
+}
+
+bool GOFFState::writeObject() {
+  // We follow a strict, recommended order:
+  // header, symbols, sections, relocations, end.
+  writeHeader(Doc.Header);
+  if (HasError)
+    return false;
+  // Iterate over all records.
+  for (auto &Rec : Doc.Records) {
+    if (auto *Rel = dyn_cast<GOFFYAML::Relocations>(Rec.get())) {
+      writeRelocationDirectory(*Rel);
+    } else if (auto *Sec = dyn_cast<GOFFYAML::Section>(Rec.get())) {
+      writeSection(*Sec);
+    } else if (auto *Sym = dyn_cast<GOFFYAML::Symbol>(Rec.get())) {
+      writeSymbol(*Sym);
+    } else {
+      reportError("Unknown record type");
+    }
+  }
+  writeEnd();
+  return true;
+}
+
+bool GOFFState::writeGOFF(raw_ostream &OS, GOFFYAML::Object &Doc,
+                          yaml::ErrorHandler ErrHandler) {
+  GOFFState State(OS, Doc, ErrHandler);
+  return State.writeObject();
+}
+} // namespace
+
+namespace llvm {
+namespace yaml {
+
+bool yaml2goff(llvm::GOFFYAML::Object &Doc, raw_ostream &Out,
+               ErrorHandler ErrHandler) {
+  return GOFFState::writeGOFF(Out, Doc, ErrHandler);
+}
+
+} // namespace yaml
+} // namespace llvm
Index: llvm/lib/ObjectYAML/GOFFYAML.cpp
===================================================================
--- /dev/null
+++ llvm/lib/ObjectYAML/GOFFYAML.cpp
@@ -0,0 +1,375 @@
+//===-- GOFFYAML.cpp - GOFF YAMLIO implementation ---------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines classes for handling the YAML representation of GOFF.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ObjectYAML/GOFFYAML.h"
+#include "llvm/BinaryFormat/GOFF.h"
+#include <string.h>
+
+namespace llvm {
+namespace GOFFYAML {
+
+Object::Object() { memset(&Header, 0, sizeof(Header)); }
+
+} // namespace GOFFYAML
+
+namespace yaml {
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDSYMBOLTYPE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDSYMBOLTYPE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_ST_SectionDefinition);
+  ECase(ESD_ST_ElementDefinition);
+  ECase(ESD_ST_LabelDefinition);
+  ECase(ESD_ST_PartReference);
+  ECase(ESD_ST_ExternalReference);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDNAMESPACEID>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDNAMESPACEID &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_NS_ProgramManagementBinder);
+  ECase(ESD_NS_NormalName);
+  ECase(ESD_NS_PseudoRegister);
+  ECase(ESD_NS_Parts);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarBitSetTraits<GOFFYAML::GOFF_ESDFlags>::bitset(
+    IO &IO, GOFFYAML::GOFF_ESDFlags &Value) {
+#define BCase(X) IO.bitSetCase(Value, #X, GOFF::X)
+#define BCaseMask(X, M) IO.maskedBitSetCase(Value, #X, GOFF::X, GOFF::M)
+  BCase(ESD_FillByteValuePresent);
+  BCase(ESD_SymbolDisplayFlag);
+  BCase(ESD_SymbolRenamingFlag);
+  BCase(ESD_RemovableClass);
+  BCaseMask(ESD_RQ_0, ESD_Mask_RQW);
+  BCaseMask(ESD_RQ_1, ESD_Mask_RQW);
+  BCaseMask(ESD_RQ_2, ESD_Mask_RQW);
+  BCaseMask(ESD_RQ_3, ESD_Mask_RQW);
+#undef BCase
+#undef BCaseMask
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_TEXTRECORDSTYLE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_TEXTRECORDSTYLE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(TXT_RS_Byte);
+  ECase(TXT_RS_Structured);
+  ECase(TXT_RS_Unstructured);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDAMODE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDAMODE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_AMODE_None);
+  ECase(ESD_AMODE_24);
+  ECase(ESD_AMODE_31);
+  ECase(ESD_AMODE_ANY);
+  ECase(ESD_AMODE_64);
+  ECase(ESD_AMODE_MIN);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDRMODE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDRMODE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_RMODE_None);
+  ECase(ESD_RMODE_24);
+  ECase(ESD_RMODE_31);
+  ECase(ESD_RMODE_64);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDTEXTSTYLE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDTEXTSTYLE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_TS_ByteOriented);
+  ECase(ESD_TS_Structured);
+  ECase(ESD_TS_Unstructured);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDBINDINGALGORITHM>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDBINDINGALGORITHM &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_BA_Concatenate);
+  ECase(ESD_BA_Merge);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDTASKINGBEHAVIOR>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDTASKINGBEHAVIOR &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_TA_Unspecified);
+  ECase(ESD_TA_NonReus);
+  ECase(ESD_TA_Reus);
+  ECase(ESD_TA_Rent);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDEXECUTABLE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDEXECUTABLE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_EXE_Unspecified);
+  ECase(ESD_EXE_DATA);
+  ECase(ESD_EXE_CODE);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDLINKAGETYPE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDLINKAGETYPE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_LT_OS);
+  ECase(ESD_LT_XPLink);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDBINDINGSTRENGTH>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDBINDINGSTRENGTH &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_BST_Strong);
+  ECase(ESD_BST_Weak);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDLOADINGBEHAVIOR>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDLOADINGBEHAVIOR &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_LB_Initial);
+  ECase(ESD_LB_Deferred);
+  ECase(ESD_LB_NoLoad);
+  ECase(ESD_LB_Reserved);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDBINDINGSCOPE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDBINDINGSCOPE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_BSC_Unspecified);
+  ECase(ESD_BSC_Section);
+  ECase(ESD_BSC_Module);
+  ECase(ESD_BSC_Library);
+  ECase(ESD_BSC_ImportExport);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_ESDALIGNMENT>::enumeration(
+    IO &IO, GOFFYAML::GOFF_ESDALIGNMENT &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(ESD_ALIGN_Byte);
+  ECase(ESD_ALIGN_Halfword);
+  ECase(ESD_ALIGN_Fullword);
+  ECase(ESD_ALIGN_Doubleword);
+  ECase(ESD_ALIGN_Quadword);
+  ECase(ESD_ALIGN_32byte);
+  ECase(ESD_ALIGN_64byte);
+  ECase(ESD_ALIGN_128byte);
+  ECase(ESD_ALIGN_256byte);
+  ECase(ESD_ALIGN_512byte);
+  ECase(ESD_ALIGN_1024byte);
+  ECase(ESD_ALIGN_2Kpage);
+  ECase(ESD_ALIGN_4Kpage);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarBitSetTraits<GOFFYAML::GOFF_BAFLAGS>::bitset(
+    IO &IO, GOFFYAML::GOFF_BAFLAGS &Value) {
+#define BCase(X) IO.bitSetCase(Value, #X, GOFF::X)
+#define BCaseMask(X, M) IO.maskedBitSetCase(Value, #X, GOFF::X, GOFF::M)
+  BCase(ESD_BA_Movable);
+  BCase(ESD_BA_ReadOnly);
+  BCase(ESD_BA_NoPrime);
+  BCase(ESD_BA_COMMON);
+  BCase(ESD_BA_Indirect);
+#undef BCase
+#undef BCaseMask
+}
+
+void ScalarBitSetTraits<GOFFYAML::GOFF_RLDFLAGS>::bitset(
+    IO &IO, GOFFYAML::GOFF_RLDFLAGS &Value) {
+#define BCase(X) IO.bitSetCase(Value, #X, GOFF::X)
+#define BCaseMask(X, M) IO.maskedBitSetCase(Value, #X, GOFF::X, GOFF::M)
+  BCase(RLD_Same_RID);
+  BCase(RLD_Same_PID);
+  BCase(RLD_Same_Offset);
+  BCase(RLD_EA_Present);
+  BCase(RLD_Offset_Length);
+  BCase(RLD_Adressing_Mode_Sensitivity);
+  BCase(RLD_FetchStore);
+#undef BCase
+#undef BCaseMask
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_RLDREFERENCETYPE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_RLDREFERENCETYPE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(RLD_RT_RAddress);
+  ECase(RLD_RT_ROffset);
+  ECase(RLD_RT_RLength);
+  ECase(RLD_RT_RRelativeImmediate);
+  ECase(RLD_RT_RTypeConstant);
+  ECase(RLD_RT_RLongDisplacement);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_RLDREFERENTTYPE>::enumeration(
+    IO &IO, GOFFYAML::GOFF_RLDREFERENTTYPE &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(RLD_RO_Label);
+  ECase(RLD_RO_Element);
+  ECase(RLD_RO_Class);
+  ECase(RLD_RO_Part);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void ScalarEnumerationTraits<GOFFYAML::GOFF_RLDACTION>::enumeration(
+    IO &IO, GOFFYAML::GOFF_RLDACTION &Value) {
+#define ECase(X) IO.enumCase(Value, #X, GOFF::X)
+  ECase(RLD_ACT_Add);
+  ECase(RLD_ACT_Subtract);
+#undef ECase
+  IO.enumFallback<Hex8>(Value);
+}
+
+void MappingTraits<GOFFYAML::Relocation>::mapping(IO &IO,
+                                                  GOFFYAML::Relocation &Rel) {
+  IO.mapRequired("Flags", Rel.Flags);
+  IO.mapRequired("ReferenceType", Rel.ReferenceType);
+  IO.mapRequired("ReferentType", Rel.ReferentType);
+  IO.mapRequired("Action", Rel.Action);
+  IO.mapRequired("TargetFieldByteLength", Rel.TargetFieldByteLength);
+  IO.mapRequired("BitLength", Rel.BitLength);
+  IO.mapRequired("BitOffset", Rel.BitOffset);
+  if (!(Rel.Flags & GOFF::RLD_Same_RID))
+    IO.mapRequired("RPointer", Rel.RPointer);
+  if (!(Rel.Flags & GOFF::RLD_Same_PID))
+    IO.mapRequired("PPointer", Rel.PPointer);
+  if (!(Rel.Flags & GOFF::RLD_Same_Offset))
+    IO.mapRequired("Offset", Rel.Offset);
+  if (Rel.Flags & GOFF::RLD_EA_Present) {
+    IO.mapOptional("ExtAttrID", Rel.ExtAttrID, 0);
+    IO.mapOptional("ExtAttrOffset", Rel.ExtAttrOffset, 0);
+  }
+}
+
+void MappingTraits<GOFFYAML::Section>::mapping(IO &IO, GOFFYAML::Section &Sec) {
+  IO.mapRequired("SymbolName", Sec.SymbolName);
+  IO.mapRequired("SymbolID", Sec.SymbolID);
+  IO.mapOptional("Offset", Sec.Offset, 0);
+  IO.mapOptional("TrueLength", Sec.TrueLength, 0);
+  IO.mapOptional("TextEncoding", Sec.TextEncoding, 0);
+  IO.mapOptional("DataLength", Sec.DataLength, 0);
+  IO.mapOptional("TextStyle", Sec.TextStyle, GOFF::TXT_RS_Byte);
+  IO.mapOptional("Data", Sec.Data);
+}
+
+void MappingTraits<GOFFYAML::Symbol>::mapping(IO &IO, GOFFYAML::Symbol &Sym) {
+  IO.mapRequired("Name", Sym.Name);
+  IO.mapRequired("Type", Sym.Type);
+  IO.mapRequired("ID", Sym.ID);
+  IO.mapOptional("OwnerID", Sym.OwnerID, 0);
+  IO.mapOptional("Address", Sym.Address, 0);
+  IO.mapOptional("Length", Sym.Length, 0);
+  IO.mapOptional("ExtAttrID", Sym.ExtAttrID, 0);
+  IO.mapOptional("ExtAttrOffset", Sym.ExtAttrOffset, 0);
+  IO.mapRequired("NameSpace", Sym.NameSpace);
+  IO.mapOptional("Flags", Sym.Flags, GOFFYAML::GOFF_ESDFlags(0));
+  IO.mapOptional("FillByteValue", Sym.FillByteValue, 0);
+  IO.mapOptional("PSectID", Sym.PSectID, 0);
+  IO.mapOptional("Priority", Sym.Priority, 0);
+  IO.mapOptional("Signature", Sym.Signature);
+  IO.mapOptional("Amode", Sym.Amode, GOFF::ESD_AMODE_None);
+  IO.mapOptional("Rmode", Sym.Rmode, GOFF::ESD_RMODE_None);
+  IO.mapOptional("TextStyle", Sym.TextStyle, GOFF::ESD_TS_ByteOriented);
+  IO.mapOptional("BindingAlgorithm", Sym.BindingAlgorithm,
+                 GOFF::ESD_BA_Concatenate);
+  IO.mapOptional("TaskingBehavior", Sym.TaskingBehavior,
+                 GOFF::ESD_TA_Unspecified);
+  IO.mapOptional("Executable", Sym.Executable, GOFF::ESD_EXE_Unspecified);
+  IO.mapOptional("LinkageType", Sym.LinkageType, GOFF::ESD_LT_OS);
+  IO.mapOptional("BindingStrength", Sym.BindingStrength, GOFF::ESD_BST_Strong);
+  IO.mapOptional("LoadingBehavior", Sym.LoadingBehavior, GOFF::ESD_LB_Initial);
+  IO.mapOptional("BindingScope", Sym.BindingScope, GOFF::ESD_BSC_Unspecified);
+  IO.mapOptional("Alignment", Sym.Alignment, GOFF::ESD_ALIGN_Byte);
+  IO.mapOptional("BAFlags", Sym.BAFlags, 0);
+}
+
+void MappingTraits<GOFFYAML::FileHeader>::mapping(
+    IO &IO, GOFFYAML::FileHeader &FileHdr) {
+  IO.mapOptional("TargetEnvironment", FileHdr.TargetEnvironment, 0);
+  IO.mapOptional("TargetOperatingSystem", FileHdr.TargetOperatingSystem, 0);
+  IO.mapOptional("CCSID", FileHdr.CCSID, 0);
+  IO.mapOptional("CharacterSetName", FileHdr.CharacterSetName, "");
+  IO.mapOptional("LanguageProductIdentifier", FileHdr.LanguageProductIdentifier,
+                 "");
+  IO.mapOptional("ArchitectureLevel", FileHdr.ArchitectureLevel, 1);
+  IO.mapOptional("InternalCCSID", FileHdr.InternalCCSID);
+  IO.mapOptional("TargetSoftwareEnvironment",
+                 FileHdr.TargetSoftwareEnvironment);
+}
+
+void CustomMappingTraits<GOFFYAML::RecordPtr>::inputOne(
+    IO &IO, StringRef Key, GOFFYAML::RecordPtr &Elem) {
+  if (Key == "Relocations") {
+    GOFFYAML::Relocations Rel;
+    IO.mapRequired("Relocations", Rel.Relocs);
+    Elem = std::make_unique<GOFFYAML::Relocations>(std::move(Rel));
+  } else if (Key == "Section") {
+    GOFFYAML::Section Sec;
+    IO.mapRequired("Section", Sec);
+    Elem = std::make_unique<GOFFYAML::Section>(std::move(Sec));
+  } else if (Key == "Symbol") {
+    GOFFYAML::Symbol Sym;
+    IO.mapRequired("Symbol", Sym);
+    Elem = std::make_unique<GOFFYAML::Symbol>(std::move(Sym));
+  }
+}
+
+void CustomMappingTraits<GOFFYAML::RecordPtr>::output(
+    IO &IO, GOFFYAML::RecordPtr &Elem) {
+  if (auto *Rel = dyn_cast<GOFFYAML::Relocations>(Elem.get())) {
+    IO.mapRequired("Relocations", Rel->Relocs);
+  } else if (auto *Sec = dyn_cast<GOFFYAML::Section>(Elem.get())) {
+    IO.mapRequired("Section", *Sec);
+  } else if (auto *Sym = dyn_cast<GOFFYAML::Symbol>(Elem.get())) {
+    IO.mapRequired("Symbol", *Sym);
+  } else {
+    IO.setError("Unknown record type");
+  }
+}
+
+void MappingTraits<GOFFYAML::Object>::mapping(IO &IO, GOFFYAML::Object &Obj) {
+  IO.mapTag("!GOFF", true);
+  IO.mapRequired("FileHeader", Obj.Header);
+  IO.mapRequired("Records", Obj.Records);
+}
+
+} // namespace yaml
+} // namespace llvm
Index: llvm/lib/ObjectYAML/ObjectYAML.cpp
===================================================================
--- llvm/lib/ObjectYAML/ObjectYAML.cpp
+++ llvm/lib/ObjectYAML/ObjectYAML.cpp
@@ -26,6 +26,8 @@
       MappingTraits<ELFYAML::Object>::mapping(IO, *ObjectFile.Elf);
     if (ObjectFile.Coff)
       MappingTraits<COFFYAML::Object>::mapping(IO, *ObjectFile.Coff);
+    if (ObjectFile.Goff)
+      MappingTraits<GOFFYAML::Object>::mapping(IO, *ObjectFile.Goff);
     if (ObjectFile.MachO)
       MappingTraits<MachOYAML::Object>::mapping(IO, *ObjectFile.MachO);
     if (ObjectFile.FatMachO)
@@ -46,6 +48,9 @@
     } else if (IO.mapTag("!COFF")) {
       ObjectFile.Coff.reset(new COFFYAML::Object());
       MappingTraits<COFFYAML::Object>::mapping(IO, *ObjectFile.Coff);
+    } else if (IO.mapTag("!GOFF")) {
+      ObjectFile.Goff.reset(new GOFFYAML::Object());
+      MappingTraits<GOFFYAML::Object>::mapping(IO, *ObjectFile.Goff);
     } else if (IO.mapTag("!mach-o")) {
       ObjectFile.MachO.reset(new MachOYAML::Object());
       MappingTraits<MachOYAML::Object>::mapping(IO, *ObjectFile.MachO);
Index: llvm/lib/ObjectYAML/yaml2obj.cpp
===================================================================
--- llvm/lib/ObjectYAML/yaml2obj.cpp
+++ llvm/lib/ObjectYAML/yaml2obj.cpp
@@ -38,6 +38,8 @@
       return yaml2elf(*Doc.Elf, Out, ErrHandler, MaxSize);
     if (Doc.Coff)
       return yaml2coff(*Doc.Coff, Out, ErrHandler);
+    if (Doc.Goff)
+      return yaml2goff(*Doc.Goff, Out, ErrHandler);
     if (Doc.MachO || Doc.FatMachO)
       return yaml2macho(Doc, Out, ErrHandler);
     if (Doc.Minidump)
Index: llvm/test/ObjectYAML/GOFF/GOFF-Basic.yaml
===================================================================
--- /dev/null
+++ llvm/test/ObjectYAML/GOFF/GOFF-Basic.yaml
@@ -0,0 +1,59 @@
+# RUN: yaml2obj %s | od -v -An -tx1 | FileCheck --ignore-case %s
+
+--- !GOFF
+FileHeader:
+  ArchitectureLevel: 1
+Records:
+# Bytes 80-159
+# CHECK: 03 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 04 88 89 7b c3 00 00 00 00
+  - Symbol:
+      Name:              'hi#C'
+      Type:              ESD_ST_SectionDefinition
+      ID:                1
+      OwnerID:           0
+      Address:           0
+      Length:            0
+      NameSpace:         ESD_NS_ProgramManagementBinder
+# Bytes 160-239
+# CHECK: 03 00 00 01 00 00 00 02 00 00 00 01 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 03 81 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 04 04 01 01
+# CHECK: 00 40 03 00 00 00 00 07 c3 6d e6 e2 c1 f6 f4 00
+  - Symbol:
+      Name:              'C_WSA64'
+      Type:              ESD_ST_ElementDefinition
+      ID:                2
+      OwnerID:           1
+      NameSpace:         ESD_NS_Parts
+      Flags:             [ ESD_FillByteValuePresent, ESD_RQ_1 ]
+      FillByteValue:     0
+      Amode:             ESD_AMODE_64
+      Rmode:             ESD_RMODE_64
+      BindingAlgorithm:  ESD_BA_Merge
+      Executable:        ESD_EXE_DATA
+      LoadingBehavior:   ESD_LB_Deferred
+      Alignment:         ESD_ALIGN_Doubleword
+# Bytes 240-319
+# CHECK: 03 00 00 03 00 00 00 03 00 00 00 02 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01
+# CHECK: 00 01 24 00 00 00 00 04 88 89 7b e2 00 00 00 00
+  - Symbol:
+      Name:              'hi#S'
+      Type:              ESD_ST_PartReference
+      ID:                3
+      OwnerID:           2
+      Address:           0
+      Length:            2
+      NameSpace:         ESD_NS_Parts
+      LinkageType:       ESD_LT_XPLink
+      Alignment:         ESD_ALIGN_Quadword
+      BindingScope:      ESD_BSC_Section
+      Executable:        ESD_EXE_DATA
+
Index: llvm/test/ObjectYAML/GOFF/GOFF-LongSymbol.yaml
===================================================================
--- /dev/null
+++ llvm/test/ObjectYAML/GOFF/GOFF-LongSymbol.yaml
@@ -0,0 +1,92 @@
+# RUN: yaml2obj %s | od -v -An -tx1 | FileCheck --ignore-case %s
+
+
+--- !GOFF
+FileHeader:
+  ArchitectureLevel: 1
+Records:
+# Bytes 80-159
+# Bits 06-07 of Byte 2 should be set to 01 to indicate that this
+# is an "initial record" and it will be continued on the subsequent
+# record.
+# CHECK: 03 01 00 00 00 00 00 01 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 39 88 89 a3 88 89 a2 89 a2
+# Bytes 160-239
+# Bits 06-07 of Byte 2 are set to 10 to indicate that this is
+# a continuation record, and it is not continued on the next
+# record.
+# CHECK: 03 02 00 81 a5 85 99 a8 a5 85 99 a8 a5 85 99 a8
+# CHECK: a5 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5 85 99 a8
+# CHECK: a5 85 99 a8 93 96 95 87 a2 a8 94 82 96 93 95 81
+# CHECK: 94 85 7b c3 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  - Symbol:
+      Name:              'hithisisaveryveryveryveryveryveryveryverylongsymbolname#C'
+      Type:              ESD_ST_SectionDefinition
+      ID:                1
+      OwnerID:           0
+      Address:           0
+      Length:            0
+      NameSpace:         ESD_NS_ProgramManagementBinder
+# CHECK: 03 00 00 01 00 00 00 02 00 00 00 01 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 03 81 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 04 04 01 01
+# CHECK: 00 40 03 00 00 00 00 07 c3 6d e6 e2 c1 f6 f4 00
+  - Symbol:
+      Name:              'C_WSA64'
+      Type:              ESD_ST_ElementDefinition
+      ID:                2
+      OwnerID:           1
+      NameSpace:         ESD_NS_Parts
+      Flags:             [ ESD_FillByteValuePresent, ESD_RQ_1 ]
+      FillByteValue:     0
+      Amode:             ESD_AMODE_64
+      Rmode:             ESD_RMODE_64
+      BindingAlgorithm:  ESD_BA_Merge
+      Executable:        ESD_EXE_DATA
+      LoadingBehavior:   ESD_LB_Deferred
+      Alignment:         ESD_ALIGN_Doubleword
+# Symbol spanning 4 records. First record's second byte
+# ends in 01 indicating that it is continued.
+# CHECK: 03 01 00 03 00 00 00 03 00 00 00 01 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 04 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01
+# CHECK: 00 00 02 00 00 00 00 cf 93 96 95 87 a2 a8 94 82
+# Second record's second byte ends in 11 indicating that it
+# is continued, and it itself is a continuation.
+# CHECK: 03 03 00 96 93 95 96 a3 a2 88 96 99 a3 a3 88 89
+# CHECK: a2 89 a2 a5 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5
+# CHECK: 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5
+# CHECK: 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5
+# CHECK: 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5
+# Third record's second byte ends in 11 indicating that it
+# is continued, and it itself is a continuation.
+# CHECK: 03 03 00 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5 85
+# CHECK: 99 a8 a5 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5 85
+# CHECK: 99 a8 a5 85 99 a8 a5 85 99 a8 a5 85 99 a8 a5 85
+# CHECK: 99 a8 a5 85 99 a8 93 96 95 87 89 95 86 81 83 a3
+# CHECK: a3 88 89 a2 89 a2 85 a5 85 95 93 96 95 87 85 99
+# Fourth record's second byte ends in 10 indicating that it
+# is not continued, but the record itself is a continuation.
+# CHECK: 03 02 00 a3 88 81 95 a3 88 85 97 99 85 a5 89 96
+# CHECK: a4 a2 a2 a8 94 82 96 93 a6 88 89 83 88 a6 81 a2
+# CHECK: 98 a4 89 a3 85 93 96 95 87 81 93 99 85 81 84 a8
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+
+  - Symbol:
+      Name:              'longsymbolnotshortthisisveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryverylonginfactthisisevenlongerthantheprevioussymbolwhichwasquitelongalready'
+      Type:              ESD_ST_PartReference
+      ID:                3
+      OwnerID:           1
+      Address:           0
+      Length:            4
+      NameSpace:         ESD_NS_Parts
+      Alignment:         ESD_ALIGN_Fullword
+      Executable:        ESD_EXE_DATA
+
Index: llvm/test/ObjectYAML/GOFF/GOFF-OneSymb.yaml
===================================================================
--- /dev/null
+++ llvm/test/ObjectYAML/GOFF/GOFF-OneSymb.yaml
@@ -0,0 +1,40 @@
+# RUN: yaml2obj %s | od -v -An -tx1 | FileCheck --ignore-case %s
+
+# Verify that GOFF Header is correct.
+# CHECK: 03 f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+
+# Verify that the symbol is written correctly.
+# CHECK: 03 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 01 a7 00 00 00 00 00 00 00
+
+# Verify GOFF Module end.
+# CHECK: 03 40 00 00 00 00 00 00 00 00 00 03 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+
+
+
+--- !GOFF
+FileHeader:
+  ArchitectureLevel: 1
+Records:
+  - Symbol:
+      Name:            'x'
+      Type:            ESD_ST_ElementDefinition
+      ID:              1
+      OwnerID:         0
+      Address:         0
+      Length:          0
+      NameSpace:       ESD_NS_NormalName
+      Flags:           []
+      FillByteValue:   0
+
Index: llvm/test/ObjectYAML/GOFF/GOFF-Relocation.yaml
===================================================================
--- /dev/null
+++ llvm/test/ObjectYAML/GOFF/GOFF-Relocation.yaml
@@ -0,0 +1,145 @@
+# RUN: yaml2obj %s | od -v -An -tx1 | FileCheck --ignore-case %s
+
+--- !GOFF
+FileHeader:
+  CharacterSetName: 'IBM-1047'
+  ArchitectureLevel: 1
+Records:
+# CHECK: 03 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 01 a7 00 00 00 00 00 00 00
+  - Symbol:
+      Name:              'x'
+      Type:              ESD_ST_SectionDefinition
+      ID:                1
+      NameSpace:         ESD_NS_NormalName
+# CHECK: 03 00 00 01 00 00 00 02 00 00 00 01 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 03 81 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 04 04 01 01
+# CHECK: 00 40 03 00 00 00 00 07 c3 6d e6 e2 c1 f6 f4 00
+  - Symbol:
+      Name:              'C_WSA64'
+      Type:              ESD_ST_ElementDefinition
+      ID:                2
+      OwnerID:           1
+      NameSpace:         ESD_NS_Parts
+      Flags:             [ ESD_FillByteValuePresent, ESD_RQ_1 ]
+      FillByteValue:     0
+      Amode:             ESD_AMODE_64
+      Rmode:             ESD_RMODE_64
+      BindingAlgorithm:  ESD_BA_Merge
+      Executable:        ESD_EXE_DATA
+      LoadingBehavior:   ESD_LB_Deferred
+      Alignment:         ESD_ALIGN_Doubleword
+# CHECK: 03 00 00 03 00 00 00 03 00 00 00 02 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 04 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 03 20 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 04 00 00 01
+# CHECK: 00 20 00 00 00 00 00 01 a7 00 00 00 00 00 00 00
+  - Symbol:
+      Name:              'x'
+      Type:              ESD_ST_PartReference
+      ID:                3
+      OwnerID:           2
+      Length:            4
+      NameSpace:         ESD_NS_Parts
+      Flags:             [ ESD_SymbolRenamingFlag ]
+      Amode:             ESD_AMODE_64
+      Executable:        ESD_EXE_DATA
+      BAFlags:           [ ESD_BA_COMMON ]
+# A TXT Record. Byte 1, bits 0-3 should be 0001.
+# CHECK: 03 10 00 00 00 00 00 03 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  - Section:
+      SymbolName:        'x'
+      SymbolID:          3
+      DataLength:        8
+# Record with a Relocation Dictionary is indicated by byte 1,
+# bits 0-3 should be 0010.
+# We have four data items. The first is missing the extended
+# attribute fields/offset so it has a length of 20 bytes.
+# The second has the RLD_Same_Offset flag so the offset field
+# isn't present, meaning it is 16 bytes. The third has the
+# RLD_SAME_PID flag in addition, and the fourth has the
+# RLD_SAME_RID flag in addition to the flags on the third
+# data item so they are 12 and 8 bytes respectively, so
+# the expected length of data items are 20+16+12+8 = 0x38.
+# CHECK: 03 20 00 00 00 38 00 71 02 00 01 44 00 00 00 00
+# CHECK: 00 03 00 00 00 03 00 00 00 05 20 71 02 00 01 44
+# CHECK: 00 00 00 00 00 03 00 00 00 03 60 71 02 00 01 44
+# CHECK: 00 00 00 00 00 03 e0 71 02 00 01 44 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  - Relocations:
+      - Flags:           []
+        ReferenceType:   RLD_RT_RTypeConstant
+        ReferentType:    RLD_RO_Element
+        Action:          RLD_ACT_Subtract
+        TargetFieldByteLength: 1
+        BitLength:       4
+        BitOffset:       4
+        RPointer:        3
+        PPointer:        3
+        Offset:          5
+      - Flags:           [RLD_Same_Offset]
+        ReferenceType:   RLD_RT_RTypeConstant
+        ReferentType:    RLD_RO_Element
+        Action:          RLD_ACT_Subtract
+        TargetFieldByteLength: 1
+        BitLength:       4
+        BitOffset:       4
+        RPointer:        3
+        PPointer:        3
+      - Flags:           [RLD_Same_Offset,RLD_Same_PID]
+        ReferenceType:   RLD_RT_RTypeConstant
+        ReferentType:    RLD_RO_Element
+        Action:          RLD_ACT_Subtract
+        TargetFieldByteLength: 1
+        BitLength:       4
+        BitOffset:       4
+        RPointer:        3
+      - Flags:           [RLD_Same_Offset,RLD_Same_PID,RLD_Same_RID]
+        ReferenceType:   RLD_RT_RTypeConstant
+        ReferentType:    RLD_RO_Element
+        Action:          RLD_ACT_Subtract
+        TargetFieldByteLength: 1
+        BitLength:       4
+        BitOffset:       4
+# Relocation Dictionary with two data items. First data item has
+# extended attributes so it has the maximal data size of 28 bytes.
+# Second data item has different RID, PID, and offset as previous item
+# so it has data size of 20, so expected data size is 28 + 20 + 48 = 0x30.
+# CHECK: 03 20 00 00 00 30 04 71 02 00 01 44 00 00 00 00
+# CHECK: 00 03 00 00 00 03 00 00 00 0a 00 00 00 01 00 00
+# CHECK: 00 06 00 71 02 00 01 44 00 00 00 00 00 02 00 00
+# CHECK: 00 02 00 00 00 05 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  - Relocations:
+      - Flags:           [RLD_EA_Present]
+        ReferenceType:   RLD_RT_RTypeConstant
+        ReferentType:    RLD_RO_Element
+        Action:          RLD_ACT_Subtract
+        TargetFieldByteLength: 1
+        BitLength:       4
+        BitOffset:       4
+        RPointer:        3
+        PPointer:        3
+        Offset:          10
+        ExtAttrID:       1
+        ExtAttrOffset:   6
+      - Flags:           []
+        ReferenceType:   RLD_RT_RTypeConstant
+        ReferentType:    RLD_RO_Element
+        Action:          RLD_ACT_Subtract
+        TargetFieldByteLength: 1
+        BitLength:       4
+        BitOffset:       4
+        RPointer:        2
+        PPointer:        2
+        Offset:          5
+...
Index: llvm/test/ObjectYAML/GOFF/GOFF-TXTSection.yaml
===================================================================
--- /dev/null
+++ llvm/test/ObjectYAML/GOFF/GOFF-TXTSection.yaml
@@ -0,0 +1,49 @@
+# RUN: yaml2obj %s | od -v -An -tx1 | FileCheck --ignore-case %s
+
+--- !GOFF
+FileHeader:
+  ArchitectureLevel: 1
+Records:
+  - Symbol:
+      Name:              'var#c'
+      Type:              ESD_ST_SectionDefinition
+      ID:                1
+      NameSpace:         ESD_NS_ProgramManagementBinder
+  - Symbol:
+      Name:              C_CODE64
+      Type:              ESD_ST_ElementDefinition
+      ID:                2
+      OwnerID:           1
+      Length:            8
+      NameSpace:         ESD_NS_NormalName
+      Flags:             [ ESD_FillByteValuePresent ]
+      FillByteValue:     0
+      Amode:             ESD_AMODE_64
+      Rmode:             ESD_RMODE_64
+      Executable:        ESD_EXE_CODE
+      Alignment:         ESD_ALIGN_Doubleword
+      BAFlags:           [ ESD_BA_ReadOnly ]
+  - Symbol:
+      Name:              'var#c'
+      Type:              ESD_ST_LabelDefinition
+      ID:                3
+      OwnerID:           2
+      NameSpace:         ESD_NS_ProgramManagementBinder
+# TXT Records' byte 1, bits 0-3 should be 0001.
+# Byte 3, bits 4-7 represent Text Record Style, with 0000
+# for byte-oriented data.
+# Note: DataLength field is 8, so despite Data field being a
+# string of length greater than 8, there are only 8 bytes of
+# data represented.
+# CHECK: 03 10 00 00 00 00 00 02 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 08 12 34 56 78 9a bc de f0
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# CHECK: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  - Section:
+      SymbolName:        C_CODE64
+      SymbolID:          2
+      TextStyle:         TXT_RS_Byte
+      DataLength:        8
+      Data:              "123456789ABCDEF0"
+...