Move yaml2obj to tools too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178904 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 707 insertions, 0 deletions

diff --git a/tools/yaml2obj/yaml2obj.cpp b/tools/yaml2obj/yaml2obj.cpp
new file mode 100644
index 0000000000..191c49fb59
--- /dev/null
+++ b/tools/yaml2obj/yaml2obj.cpp
@@ -0,0 +1,707 @@
+//===- yaml2obj - Convert YAML to a binary object file --------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This program takes a YAML description of an object file and outputs the
+// binary equivalent.
+//
+// This is used for writing tests that require binary files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/COFF.h"
+#include "llvm/Support/Casting.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/YAMLTraits.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/system_error.h"
+#include <vector>
+
+using namespace llvm;
+
+static cl::opt<std::string>
+  Input(cl::Positional, cl::desc("<input>"), cl::init("-"));
+
+template<class T>
+typename llvm::enable_if_c<std::numeric_limits<T>::is_integer, bool>::type
+getAs(const llvm::yaml::ScalarNode *SN, T &Result) {
+  SmallString<4> Storage;
+  StringRef Value = SN->getValue(Storage);
+  if (Value.getAsInteger(0, Result))
+    return false;
+  return true;
+}
+
+// Given a container with begin and end with ::value_type of a character type.
+// Iterate through pairs of characters in the the set of [a-fA-F0-9] ignoring
+// all other characters.
+struct hex_pair_iterator {
+  StringRef::const_iterator Current, End;
+  typedef SmallVector<char, 2> value_type;
+  value_type Pair;
+  bool IsDone;
+
+  hex_pair_iterator(StringRef C)
+    : Current(C.begin()), End(C.end()), IsDone(false) {
+    // Initalize Pair.
+    ++*this;
+  }
+
+  // End iterator.
+  hex_pair_iterator() : Current(), End(), IsDone(true) {}
+
+  value_type operator *() const {
+    return Pair;
+  }
+
+  hex_pair_iterator operator ++() {
+    // We're at the end of the input.
+    if (Current == End) {
+      IsDone = true;
+      return *this;
+    }
+    Pair = value_type();
+    for (; Current != End && Pair.size() != 2; ++Current) {
+      // Is a valid hex digit.
+      if ((*Current >= '0' && *Current <= '9') ||
+          (*Current >= 'a' && *Current <= 'f') ||
+          (*Current >= 'A' && *Current <= 'F'))
+        Pair.push_back(*Current);
+    }
+    // Hit the end without getting 2 hex digits. Pair is invalid.
+    if (Pair.size() != 2)
+      IsDone = true;
+    return *this;
+  }
+
+  bool operator ==(const hex_pair_iterator Other) {
+    return (IsDone == Other.IsDone) ||
+           (Current == Other.Current && End == Other.End);
+  }
+
+  bool operator !=(const hex_pair_iterator Other) {
+    return !(*this == Other);
+  }
+};
+
+template <class ContainerOut>
+static bool hexStringToByteArray(StringRef Str, ContainerOut &Out) {
+  for (hex_pair_iterator I(Str), E; I != E; ++I) {
+    typename hex_pair_iterator::value_type Pair = *I;
+    typename ContainerOut::value_type Byte;
+    if (StringRef(Pair.data(), 2).getAsInteger(16, Byte))
+      return false;
+    Out.push_back(Byte);
+  }
+  return true;
+}
+
+// The structure of the yaml files is not an exact 1:1 match to COFF. In order
+// to use yaml::IO, we use these structures which are closer to the source.
+namespace COFFYAML {
+  struct Relocation {
+    uint32_t VirtualAddress;
+    uint32_t SymbolTableIndex;
+    COFF::RelocationTypeX86 Type;
+  };
+
+  struct Section {
+    COFF::SectionCharacteristics Characteristics;
+    StringRef SectionData;
+    std::vector<Relocation> Relocations;
+    StringRef Name;
+  };
+
+  struct Header {
+    COFF::MachineTypes Machine;
+    COFF::Characteristics Characteristics;
+  };
+
+  struct Symbol {
+    COFF::SymbolBaseType SimpleType;
+    uint8_t NumberOfAuxSymbols;
+    StringRef Name;
+    COFF::SymbolStorageClass StorageClass;
+    StringRef AuxillaryData;
+    COFF::SymbolComplexType ComplexType;
+    uint32_t Value;
+    uint16_t SectionNumber;
+  };
+
+  struct Object {
+    Header HeaderData;
+    std::vector<Section> Sections;
+    std::vector<Symbol> Symbols;
+  };
+}
+
+/// This parses a yaml stream that represents a COFF object file.
+/// See docs/yaml2obj for the yaml scheema.
+struct COFFParser {
+  COFFParser(COFFYAML::Object &Obj) : Obj(Obj) {
+    std::memset(&Header, 0, sizeof(Header));
+    // A COFF string table always starts with a 4 byte size field. Offsets into
+    // it include this size, so allocate it now.
+    StringTable.append(4, 0);
+  }
+
+  void parseHeader() {
+    Header.Machine = Obj.HeaderData.Machine;
+    Header.Characteristics = Obj.HeaderData.Characteristics;
+  }
+
+  bool parseSections() {
+    for (std::vector<COFFYAML::Section>::iterator i = Obj.Sections.begin(),
+           e = Obj.Sections.end(); i != e; ++i) {
+      const COFFYAML::Section &YamlSection = *i;
+      Section Sec;
+      std::memset(&Sec.Header, 0, sizeof(Sec.Header));
+
+      // If the name is less than 8 bytes, store it in place, otherwise
+      // store it in the string table.
+      StringRef Name = YamlSection.Name;
+      std::fill_n(Sec.Header.Name, unsigned(COFF::NameSize), 0);
+      if (Name.size() <= COFF::NameSize) {
+        std::copy(Name.begin(), Name.end(), Sec.Header.Name);
+      } else {
+        // Add string to the string table and format the index for output.
+        unsigned Index = getStringIndex(Name);
+        std::string str = utostr(Index);
+        if (str.size() > 7) {
+          errs() << "String table got too large";
+          return false;
+        }
+        Sec.Header.Name[0] = '/';
+        std::copy(str.begin(), str.end(), Sec.Header.Name + 1);
+      }
+
+      Sec.Header.Characteristics = YamlSection.Characteristics;
+
+      StringRef Data = YamlSection.SectionData;
+      if (!hexStringToByteArray(Data, Sec.Data)) {
+        errs() << "SectionData must be a collection of pairs of hex bytes";
+        return false;
+      }
+      Sections.push_back(Sec);
+    }
+    return true;
+  }
+
+  bool parseSymbols() {
+    for (std::vector<COFFYAML::Symbol>::iterator i = Obj.Symbols.begin(),
+           e = Obj.Symbols.end(); i != e; ++i) {
+      COFFYAML::Symbol YamlSymbol = *i;
+      Symbol Sym;
+      std::memset(&Sym.Header, 0, sizeof(Sym.Header));
+
+      // If the name is less than 8 bytes, store it in place, otherwise
+      // store it in the string table.
+      StringRef Name = YamlSymbol.Name;
+      std::fill_n(Sym.Header.Name, unsigned(COFF::NameSize), 0);
+      if (Name.size() <= COFF::NameSize) {
+        std::copy(Name.begin(), Name.end(), Sym.Header.Name);
+      } else {
+        // Add string to the string table and format the index for output.
+        unsigned Index = getStringIndex(Name);
+        *reinterpret_cast<support::aligned_ulittle32_t*>(
+            Sym.Header.Name + 4) = Index;
+      }
+
+      Sym.Header.Value = YamlSymbol.Value;
+      Sym.Header.Type |= YamlSymbol.SimpleType;
+      Sym.Header.Type |= YamlSymbol.ComplexType << COFF::SCT_COMPLEX_TYPE_SHIFT;
+      Sym.Header.StorageClass = YamlSymbol.StorageClass;
+      Sym.Header.SectionNumber = YamlSymbol.SectionNumber;
+
+      StringRef Data = YamlSymbol.AuxillaryData;
+      if (!hexStringToByteArray(Data, Sym.AuxSymbols)) {
+        errs() << "AuxillaryData must be a collection of pairs of hex bytes";
+        return false;
+      }
+      Symbols.push_back(Sym);
+    }
+    return true;
+  }
+
+  bool parse() {
+    parseHeader();
+    if (!parseSections())
+      return false;
+    if (!parseSymbols())
+      return false;
+    return true;
+  }
+
+  unsigned getStringIndex(StringRef Str) {
+    StringMap<unsigned>::iterator i = StringTableMap.find(Str);
+    if (i == StringTableMap.end()) {
+      unsigned Index = StringTable.size();
+      StringTable.append(Str.begin(), Str.end());
+      StringTable.push_back(0);
+      StringTableMap[Str] = Index;
+      return Index;
+    }
+    return i->second;
+  }
+
+  COFFYAML::Object &Obj;
+  COFF::header Header;
+
+  struct Section {
+    COFF::section Header;
+    std::vector<uint8_t> Data;
+    std::vector<COFF::relocation> Relocations;
+  };
+
+  struct Symbol {
+    COFF::symbol Header;
+    std::vector<uint8_t> AuxSymbols;
+  };
+
+  std::vector<Section> Sections;
+  std::vector<Symbol> Symbols;
+  StringMap<unsigned> StringTableMap;
+  std::string StringTable;
+};
+
+// Take a CP and assign addresses and sizes to everything. Returns false if the
+// layout is not valid to do.
+static bool layoutCOFF(COFFParser &CP) {
+  uint32_t SectionTableStart = 0;
+  uint32_t SectionTableSize  = 0;
+
+  // The section table starts immediately after the header, including the
+  // optional header.
+  SectionTableStart = sizeof(COFF::header) + CP.Header.SizeOfOptionalHeader;
+  SectionTableSize = sizeof(COFF::section) * CP.Sections.size();
+
+  uint32_t CurrentSectionDataOffset = SectionTableStart + SectionTableSize;
+
+  // Assign each section data address consecutively.
+  for (std::vector<COFFParser::Section>::iterator i = CP.Sections.begin(),
+                                                  e = CP.Sections.end();
+                                                  i != e; ++i) {
+    if (!i->Data.empty()) {
+      i->Header.SizeOfRawData = i->Data.size();
+      i->Header.PointerToRawData = CurrentSectionDataOffset;
+      CurrentSectionDataOffset += i->Header.SizeOfRawData;
+      // TODO: Handle alignment.
+    } else {
+      i->Header.SizeOfRawData = 0;
+      i->Header.PointerToRawData = 0;
+    }
+  }
+
+  uint32_t SymbolTableStart = CurrentSectionDataOffset;
+
+  // Calculate number of symbols.
+  uint32_t NumberOfSymbols = 0;
+  for (std::vector<COFFParser::Symbol>::iterator i = CP.Symbols.begin(),
+                                                 e = CP.Symbols.end();
+                                                 i != e; ++i) {
+    if (i->AuxSymbols.size() % COFF::SymbolSize != 0) {
+      errs() << "AuxillaryData size not a multiple of symbol size!\n";
+      return false;
+    }
+    i->Header.NumberOfAuxSymbols = i->AuxSymbols.size() / COFF::SymbolSize;
+    NumberOfSymbols += 1 + i->Header.NumberOfAuxSymbols;
+  }
+
+  // Store all the allocated start addresses in the header.
+  CP.Header.NumberOfSections = CP.Sections.size();
+  CP.Header.NumberOfSymbols = NumberOfSymbols;
+  CP.Header.PointerToSymbolTable = SymbolTableStart;
+
+  *reinterpret_cast<support::ulittle32_t *>(&CP.StringTable[0])
+    = CP.StringTable.size();
+
+  return true;
+}
+
+template <typename value_type>
+struct binary_le_impl {
+  value_type Value;
+  binary_le_impl(value_type V) : Value(V) {}
+};
+
+template <typename value_type>
+raw_ostream &operator <<( raw_ostream &OS
+                        , const binary_le_impl<value_type> &BLE) {
+  char Buffer[sizeof(BLE.Value)];
+  support::endian::write<value_type, support::little, support::unaligned>(
+    Buffer, BLE.Value);
+  OS.write(Buffer, sizeof(BLE.Value));
+  return OS;
+}
+
+template <typename value_type>
+binary_le_impl<value_type> binary_le(value_type V) {
+  return binary_le_impl<value_type>(V);
+}
+
+void writeCOFF(COFFParser &CP, raw_ostream &OS) {
+  OS << binary_le(CP.Header.Machine)
+     << binary_le(CP.Header.NumberOfSections)
+     << binary_le(CP.Header.TimeDateStamp)
+     << binary_le(CP.Header.PointerToSymbolTable)
+     << binary_le(CP.Header.NumberOfSymbols)
+     << binary_le(CP.Header.SizeOfOptionalHeader)
+     << binary_le(CP.Header.Characteristics);
+
+  // Output section table.
+  for (std::vector<COFFParser::Section>::const_iterator i = CP.Sections.begin(),
+                                                        e = CP.Sections.end();
+                                                        i != e; ++i) {
+    OS.write(i->Header.Name, COFF::NameSize);
+    OS << binary_le(i->Header.VirtualSize)
+       << binary_le(i->Header.VirtualAddress)
+       << binary_le(i->Header.SizeOfRawData)
+       << binary_le(i->Header.PointerToRawData)
+       << binary_le(i->Header.PointerToRelocations)
+       << binary_le(i->Header.PointerToLineNumbers)
+       << binary_le(i->Header.NumberOfRelocations)
+       << binary_le(i->Header.NumberOfLineNumbers)
+       << binary_le(i->Header.Characteristics);
+  }
+
+  // Output section data.
+  for (std::vector<COFFParser::Section>::const_iterator i = CP.Sections.begin(),
+                                                        e = CP.Sections.end();
+                                                        i != e; ++i) {
+    if (!i->Data.empty())
+      OS.write(reinterpret_cast<const char*>(&i->Data[0]), i->Data.size());
+  }
+
+  // Output symbol table.
+
+  for (std::vector<COFFParser::Symbol>::const_iterator i = CP.Symbols.begin(),
+                                                       e = CP.Symbols.end();
+                                                       i != e; ++i) {
+    OS.write(i->Header.Name, COFF::NameSize);
+    OS << binary_le(i->Header.Value)
+       << binary_le(i->Header.SectionNumber)
+       << binary_le(i->Header.Type)
+       << binary_le(i->Header.StorageClass)
+       << binary_le(i->Header.NumberOfAuxSymbols);
+    if (!i->AuxSymbols.empty())
+      OS.write( reinterpret_cast<const char*>(&i->AuxSymbols[0])
+              , i->AuxSymbols.size());
+  }
+
+  // Output string table.
+  OS.write(&CP.StringTable[0], CP.StringTable.size());
+}
+
+LLVM_YAML_IS_SEQUENCE_VECTOR(COFFYAML::Relocation)
+LLVM_YAML_IS_SEQUENCE_VECTOR(COFFYAML::Section)
+LLVM_YAML_IS_SEQUENCE_VECTOR(COFFYAML::Symbol)
+
+namespace llvm {
+
+namespace COFF {
+  Characteristics operator|(Characteristics a, Characteristics b) {
+    uint32_t Ret = static_cast<uint32_t>(a) | static_cast<uint32_t>(b);
+    return static_cast<Characteristics>(Ret);
+  }
+
+  SectionCharacteristics
+  operator|(SectionCharacteristics a, SectionCharacteristics b) {
+    uint32_t Ret = static_cast<uint32_t>(a) | static_cast<uint32_t>(b);
+    return static_cast<SectionCharacteristics>(Ret);
+  }
+}
+
+namespace yaml {
+
+#define BCase(X) IO.bitSetCase(Value, #X, COFF::X);
+
+template <>
+struct ScalarBitSetTraits<COFF::SectionCharacteristics> {
+  static void bitset(IO &IO, COFF::SectionCharacteristics &Value) {
+    BCase(IMAGE_SCN_TYPE_NO_PAD);
+    BCase(IMAGE_SCN_CNT_CODE);
+    BCase(IMAGE_SCN_CNT_INITIALIZED_DATA);
+    BCase(IMAGE_SCN_CNT_UNINITIALIZED_DATA);
+    BCase(IMAGE_SCN_LNK_OTHER);
+    BCase(IMAGE_SCN_LNK_INFO);
+    BCase(IMAGE_SCN_LNK_REMOVE);
+    BCase(IMAGE_SCN_LNK_COMDAT);
+    BCase(IMAGE_SCN_GPREL);
+    BCase(IMAGE_SCN_MEM_PURGEABLE);
+    BCase(IMAGE_SCN_MEM_16BIT);
+    BCase(IMAGE_SCN_MEM_LOCKED);
+    BCase(IMAGE_SCN_MEM_PRELOAD);
+    BCase(IMAGE_SCN_ALIGN_1BYTES);
+    BCase(IMAGE_SCN_ALIGN_2BYTES);
+    BCase(IMAGE_SCN_ALIGN_4BYTES);
+    BCase(IMAGE_SCN_ALIGN_8BYTES);
+    BCase(IMAGE_SCN_ALIGN_16BYTES);
+    BCase(IMAGE_SCN_ALIGN_32BYTES);
+    BCase(IMAGE_SCN_ALIGN_64BYTES);
+    BCase(IMAGE_SCN_ALIGN_128BYTES);
+    BCase(IMAGE_SCN_ALIGN_256BYTES);
+    BCase(IMAGE_SCN_ALIGN_512BYTES);
+    BCase(IMAGE_SCN_ALIGN_1024BYTES);
+    BCase(IMAGE_SCN_ALIGN_2048BYTES);
+    BCase(IMAGE_SCN_ALIGN_4096BYTES);
+    BCase(IMAGE_SCN_ALIGN_8192BYTES);
+    BCase(IMAGE_SCN_LNK_NRELOC_OVFL);
+    BCase(IMAGE_SCN_MEM_DISCARDABLE);
+    BCase(IMAGE_SCN_MEM_NOT_CACHED);
+    BCase(IMAGE_SCN_MEM_NOT_PAGED);
+    BCase(IMAGE_SCN_MEM_SHARED);
+    BCase(IMAGE_SCN_MEM_EXECUTE);
+    BCase(IMAGE_SCN_MEM_READ);
+    BCase(IMAGE_SCN_MEM_WRITE);
+  }
+};
+
+template <>
+struct ScalarBitSetTraits<COFF::Characteristics> {
+  static void bitset(IO &IO, COFF::Characteristics &Value) {
+    BCase(IMAGE_FILE_RELOCS_STRIPPED);
+    BCase(IMAGE_FILE_EXECUTABLE_IMAGE);
+    BCase(IMAGE_FILE_LINE_NUMS_STRIPPED);
+    BCase(IMAGE_FILE_LOCAL_SYMS_STRIPPED);
+    BCase(IMAGE_FILE_AGGRESSIVE_WS_TRIM);
+    BCase(IMAGE_FILE_LARGE_ADDRESS_AWARE);
+    BCase(IMAGE_FILE_BYTES_REVERSED_LO);
+    BCase(IMAGE_FILE_32BIT_MACHINE);
+    BCase(IMAGE_FILE_DEBUG_STRIPPED);
+    BCase(IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP);
+    BCase(IMAGE_FILE_NET_RUN_FROM_SWAP);
+    BCase(IMAGE_FILE_SYSTEM);
+    BCase(IMAGE_FILE_DLL);
+    BCase(IMAGE_FILE_UP_SYSTEM_ONLY);
+    BCase(IMAGE_FILE_BYTES_REVERSED_HI);
+  }
+};
+#undef BCase
+
+#define ECase(X) IO.enumCase(Value, #X, COFF::X);
+
+template <>
+struct ScalarEnumerationTraits<COFF::SymbolComplexType> {
+  static void enumeration(IO &IO, COFF::SymbolComplexType &Value) {
+    ECase(IMAGE_SYM_DTYPE_NULL);
+    ECase(IMAGE_SYM_DTYPE_POINTER);
+    ECase(IMAGE_SYM_DTYPE_FUNCTION);
+    ECase(IMAGE_SYM_DTYPE_ARRAY);
+  }
+};
+
+template <>
+struct ScalarEnumerationTraits<COFF::SymbolStorageClass> {
+  static void enumeration(IO &IO, COFF::SymbolStorageClass &Value) {
+    ECase(IMAGE_SYM_CLASS_END_OF_FUNCTION);
+    ECase(IMAGE_SYM_CLASS_NULL);
+    ECase(IMAGE_SYM_CLASS_AUTOMATIC);
+    ECase(IMAGE_SYM_CLASS_EXTERNAL);
+    ECase(IMAGE_SYM_CLASS_STATIC);
+    ECase(IMAGE_SYM_CLASS_REGISTER);
+    ECase(IMAGE_SYM_CLASS_EXTERNAL_DEF);
+    ECase(IMAGE_SYM_CLASS_LABEL);
+    ECase(IMAGE_SYM_CLASS_UNDEFINED_LABEL);
+    ECase(IMAGE_SYM_CLASS_MEMBER_OF_STRUCT);
+    ECase(IMAGE_SYM_CLASS_ARGUMENT);
+    ECase(IMAGE_SYM_CLASS_STRUCT_TAG);
+    ECase(IMAGE_SYM_CLASS_MEMBER_OF_UNION);
+    ECase(IMAGE_SYM_CLASS_UNION_TAG);
+    ECase(IMAGE_SYM_CLASS_TYPE_DEFINITION);
+    ECase(IMAGE_SYM_CLASS_UNDEFINED_STATIC);
+    ECase(IMAGE_SYM_CLASS_ENUM_TAG);
+    ECase(IMAGE_SYM_CLASS_MEMBER_OF_ENUM);
+    ECase(IMAGE_SYM_CLASS_REGISTER_PARAM);
+    ECase(IMAGE_SYM_CLASS_BIT_FIELD);
+    ECase(IMAGE_SYM_CLASS_BLOCK);
+    ECase(IMAGE_SYM_CLASS_FUNCTION);
+    ECase(IMAGE_SYM_CLASS_END_OF_STRUCT);
+    ECase(IMAGE_SYM_CLASS_FILE);
+    ECase(IMAGE_SYM_CLASS_SECTION);
+    ECase(IMAGE_SYM_CLASS_WEAK_EXTERNAL);
+    ECase(IMAGE_SYM_CLASS_CLR_TOKEN);
+  }
+};
+
+template <>
+struct ScalarEnumerationTraits<COFF::SymbolBaseType> {
+  static void enumeration(IO &IO, COFF::SymbolBaseType &Value) {
+    ECase(IMAGE_SYM_TYPE_NULL);
+    ECase(IMAGE_SYM_TYPE_VOID);
+    ECase(IMAGE_SYM_TYPE_CHAR);
+    ECase(IMAGE_SYM_TYPE_SHORT);
+    ECase(IMAGE_SYM_TYPE_INT);
+    ECase(IMAGE_SYM_TYPE_LONG);
+    ECase(IMAGE_SYM_TYPE_FLOAT);
+    ECase(IMAGE_SYM_TYPE_DOUBLE);
+    ECase(IMAGE_SYM_TYPE_STRUCT);
+    ECase(IMAGE_SYM_TYPE_UNION);
+    ECase(IMAGE_SYM_TYPE_ENUM);
+    ECase(IMAGE_SYM_TYPE_MOE);
+    ECase(IMAGE_SYM_TYPE_BYTE);
+    ECase(IMAGE_SYM_TYPE_WORD);
+    ECase(IMAGE_SYM_TYPE_UINT);
+    ECase(IMAGE_SYM_TYPE_DWORD);
+  }
+};
+
+template <>
+struct ScalarEnumerationTraits<COFF::MachineTypes> {
+  static void enumeration(IO &IO, COFF::MachineTypes &Value) {
+    ECase(IMAGE_FILE_MACHINE_UNKNOWN);
+    ECase(IMAGE_FILE_MACHINE_AM33);
+    ECase(IMAGE_FILE_MACHINE_AMD64);
+    ECase(IMAGE_FILE_MACHINE_ARM);
+    ECase(IMAGE_FILE_MACHINE_ARMV7);
+    ECase(IMAGE_FILE_MACHINE_EBC);
+    ECase(IMAGE_FILE_MACHINE_I386);
+    ECase(IMAGE_FILE_MACHINE_IA64);
+    ECase(IMAGE_FILE_MACHINE_M32R);
+    ECase(IMAGE_FILE_MACHINE_MIPS16);
+    ECase(IMAGE_FILE_MACHINE_MIPSFPU);
+    ECase(IMAGE_FILE_MACHINE_MIPSFPU16);
+    ECase(IMAGE_FILE_MACHINE_POWERPC);
+    ECase(IMAGE_FILE_MACHINE_POWERPCFP);
+    ECase(IMAGE_FILE_MACHINE_R4000);
+    ECase(IMAGE_FILE_MACHINE_SH3);
+    ECase(IMAGE_FILE_MACHINE_SH3DSP);
+    ECase(IMAGE_FILE_MACHINE_SH4);
+    ECase(IMAGE_FILE_MACHINE_SH5);
+    ECase(IMAGE_FILE_MACHINE_THUMB);
+    ECase(IMAGE_FILE_MACHINE_WCEMIPSV2);
+  }
+};
+
+template <>
+struct ScalarEnumerationTraits<COFF::RelocationTypeX86> {
+  static void enumeration(IO &IO, COFF::RelocationTypeX86 &Value) {
+    ECase(IMAGE_REL_I386_ABSOLUTE);
+    ECase(IMAGE_REL_I386_DIR16);
+    ECase(IMAGE_REL_I386_REL16);
+    ECase(IMAGE_REL_I386_DIR32);
+    ECase(IMAGE_REL_I386_DIR32NB);
+    ECase(IMAGE_REL_I386_SEG12);
+    ECase(IMAGE_REL_I386_SECTION);
+    ECase(IMAGE_REL_I386_SECREL);
+    ECase(IMAGE_REL_I386_TOKEN);
+    ECase(IMAGE_REL_I386_SECREL7);
+    ECase(IMAGE_REL_I386_REL32);
+    ECase(IMAGE_REL_AMD64_ABSOLUTE);
+    ECase(IMAGE_REL_AMD64_ADDR64);
+    ECase(IMAGE_REL_AMD64_ADDR32);
+    ECase(IMAGE_REL_AMD64_ADDR32NB);
+    ECase(IMAGE_REL_AMD64_REL32);
+    ECase(IMAGE_REL_AMD64_REL32_1);
+    ECase(IMAGE_REL_AMD64_REL32_2);
+    ECase(IMAGE_REL_AMD64_REL32_3);
+    ECase(IMAGE_REL_AMD64_REL32_4);
+    ECase(IMAGE_REL_AMD64_REL32_5);
+    ECase(IMAGE_REL_AMD64_SECTION);
+    ECase(IMAGE_REL_AMD64_SECREL);
+    ECase(IMAGE_REL_AMD64_SECREL7);
+    ECase(IMAGE_REL_AMD64_TOKEN);
+    ECase(IMAGE_REL_AMD64_SREL32);
+    ECase(IMAGE_REL_AMD64_PAIR);
+    ECase(IMAGE_REL_AMD64_SSPAN32);
+  }
+};
+
+#undef ECase
+
+template <>
+struct MappingTraits<COFFYAML::Symbol> {
+  static void mapping(IO &IO, COFFYAML::Symbol &S) {
+    IO.mapRequired("SimpleType", S.SimpleType);
+    IO.mapOptional("NumberOfAuxSymbols", S.NumberOfAuxSymbols);
+    IO.mapRequired("Name", S.Name);
+    IO.mapRequired("StorageClass", S.StorageClass);
+    IO.mapOptional("AuxillaryData", S.AuxillaryData); // FIXME: typo
+    IO.mapRequired("ComplexType", S.ComplexType);
+    IO.mapRequired("Value", S.Value);
+    IO.mapRequired("SectionNumber", S.SectionNumber);
+  }
+};
+
+template <>
+struct MappingTraits<COFFYAML::Header> {
+  static void mapping(IO &IO, COFFYAML::Header &H) {
+    IO.mapRequired("Machine", H.Machine);
+    IO.mapOptional("Characteristics", H.Characteristics);
+  }
+};
+
+template <>
+struct MappingTraits<COFFYAML::Relocation> {
+  static void mapping(IO &IO, COFFYAML::Relocation &Rel) {
+    IO.mapRequired("Type", Rel.Type);
+    IO.mapRequired("VirtualAddress", Rel.VirtualAddress);
+    IO.mapRequired("SymbolTableIndex", Rel.SymbolTableIndex);
+  }
+};
+
+template <>
+struct MappingTraits<COFFYAML::Section> {
+  static void mapping(IO &IO, COFFYAML::Section &Sec) {
+    IO.mapOptional("Relocations", Sec.Relocations);
+    IO.mapRequired("SectionData", Sec.SectionData);
+    IO.mapRequired("Characteristics", Sec.Characteristics);
+    IO.mapRequired("Name", Sec.Name);
+  }
+};
+
+template <>
+struct MappingTraits<COFFYAML::Object> {
+  static void mapping(IO &IO, COFFYAML::Object &Obj) {
+    IO.mapRequired("sections", Obj.Sections);
+    IO.mapRequired("header", Obj.HeaderData);
+    IO.mapRequired("symbols", Obj.Symbols);
+  }
+};
+} // end namespace yaml
+} // end namespace llvm
+
+int main(int argc, char **argv) {
+  cl::ParseCommandLineOptions(argc, argv);
+  sys::PrintStackTraceOnErrorSignal();
+  PrettyStackTraceProgram X(argc, argv);
+  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
+
+  OwningPtr<MemoryBuffer> Buf;
+  if (MemoryBuffer::getFileOrSTDIN(Input, Buf))
+    return 1;
+
+  yaml::Input YIn(Buf->getBuffer());
+  COFFYAML::Object Doc;
+  YIn >> Doc;
+  if (YIn.error()) {
+    errs() << "yaml2obj: Failed to parse YAML file!\n";
+    return 1;
+  }
+
+  COFFParser CP(Doc);
+  if (!CP.parse()) {
+    errs() << "yaml2obj: Failed to parse YAML file!\n";
+    return 1;
+  }
+
+  if (!layoutCOFF(CP)) {
+    errs() << "yaml2obj: Failed to layout COFF file!\n";
+    return 1;
+  }
+  writeCOFF(CP, outs());
+}