include/llvm/Support/COFF.h

   1 //===-- llvm/Support/COFF.h -------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file contains an definitions used in Windows COFF Files.
  11 //
  12 // Structures and enums defined within this file where created using
  13 // information from Microsoft's publicly available PE/COFF format document:
  14 //
  15 // Microsoft Portable Executable and Common Object File Format Specification
  16 // Revision 8.1 - February 15, 2008
  17 //
  18 // As of 5/2/2010, hosted by Microsoft at:
  19 // http://www.microsoft.com/whdc/system/platform/firmware/pecoff.mspx
  20 //
  21 //===----------------------------------------------------------------------===//
  22
  23 #ifndef LLVM_SUPPORT_WIN_COFF_H
  24 #define LLVM_SUPPORT_WIN_COFF_H
  25
  26 #include "llvm/Support/DataTypes.h"
  27 #include <cassert>
  28 #include <cstring>
  29
  30 namespace llvm {
  31 namespace COFF {
  32
  33   // Sizes in bytes of various things in the COFF format.
  34   enum {
  35     HeaderSize     = 20,
  36     NameSize       = 8,
  37     SymbolSize     = 18,
  38     SectionSize    = 40,
  39     RelocationSize = 10
  40   };
  41
  42   struct header {
  43     uint16_t Machine;
  44     uint16_t NumberOfSections;
  45     uint32_t TimeDateStamp;
  46     uint32_t PointerToSymbolTable;
  47     uint32_t NumberOfSymbols;
  48     uint16_t SizeOfOptionalHeader;
  49     uint16_t Characteristics;
  50   };
  51
  52   enum MachineTypes {
  53     MT_Invalid = 0xffff,
  54
  55     IMAGE_FILE_MACHINE_UNKNOWN   = 0x0,
  56     IMAGE_FILE_MACHINE_AM33      = 0x13,
  57     IMAGE_FILE_MACHINE_AMD64     = 0x8664,
  58     IMAGE_FILE_MACHINE_ARM       = 0x1C0,
  59     IMAGE_FILE_MACHINE_ARMV7     = 0x1C4,
  60     IMAGE_FILE_MACHINE_EBC       = 0xEBC,
  61     IMAGE_FILE_MACHINE_I386      = 0x14C,
  62     IMAGE_FILE_MACHINE_IA64      = 0x200,
  63     IMAGE_FILE_MACHINE_M32R      = 0x9041,
  64     IMAGE_FILE_MACHINE_MIPS16    = 0x266,
  65     IMAGE_FILE_MACHINE_MIPSFPU   = 0x366,
  66     IMAGE_FILE_MACHINE_MIPSFPU16 = 0x466,
  67     IMAGE_FILE_MACHINE_POWERPC   = 0x1F0,
  68     IMAGE_FILE_MACHINE_POWERPCFP = 0x1F1,
  69     IMAGE_FILE_MACHINE_R4000     = 0x166,
  70     IMAGE_FILE_MACHINE_SH3       = 0x1A2,
  71     IMAGE_FILE_MACHINE_SH3DSP    = 0x1A3,
  72     IMAGE_FILE_MACHINE_SH4       = 0x1A6,
  73     IMAGE_FILE_MACHINE_SH5       = 0x1A8,
  74     IMAGE_FILE_MACHINE_THUMB     = 0x1C2,
  75     IMAGE_FILE_MACHINE_WCEMIPSV2 = 0x169
  76   };
  77
  78   enum Characteristics {
  79     C_Invalid = 0,
  80
  81     /// The file does not contain base relocations and must be loaded at its
  82     /// preferred base. If this cannot be done, the loader will error.
  83     IMAGE_FILE_RELOCS_STRIPPED         = 0x0001,
  84     /// The file is valid and can be run.
  85     IMAGE_FILE_EXECUTABLE_IMAGE        = 0x0002,
  86     /// COFF line numbers have been stripped. This is deprecated and should be
  87     /// 0.
  88     IMAGE_FILE_LINE_NUMS_STRIPPED      = 0x0004,
  89     /// COFF symbol table entries for local symbols have been removed. This is
  90     /// deprecated and should be 0.
  91     IMAGE_FILE_LOCAL_SYMS_STRIPPED     = 0x0008,
  92     /// Aggressively trim working set. This is deprecated and must be 0.
  93     IMAGE_FILE_AGGRESSIVE_WS_TRIM      = 0x0010,
  94     /// Image can handle > 2GiB addresses.
  95     IMAGE_FILE_LARGE_ADDRESS_AWARE     = 0x0020,
  96     /// Little endian: the LSB precedes the MSB in memory. This is deprecated
  97     /// and should be 0.
  98     IMAGE_FILE_BYTES_REVERSED_LO       = 0x0080,
  99     /// Machine is based on a 32bit word architecture.
 100     IMAGE_FILE_32BIT_MACHINE           = 0x0100,
 101     /// Debugging info has been removed.
 102     IMAGE_FILE_DEBUG_STRIPPED          = 0x0200,
 103     /// If the image is on removable media, fully load it and copy it to swap.
 104     IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP = 0x0400,
 105     /// If the image is on network media, fully load it and copy it to swap.
 106     IMAGE_FILE_NET_RUN_FROM_SWAP       = 0x0800,
 107     /// The image file is a system file, not a user program.
 108     IMAGE_FILE_SYSTEM                  = 0x1000,
 109     /// The image file is a DLL.
 110     IMAGE_FILE_DLL                     = 0x2000,
 111     /// This file should only be run on a uniprocessor machine.
 112     IMAGE_FILE_UP_SYSTEM_ONLY          = 0x4000,
 113     /// Big endian: the MSB precedes the LSB in memory. This is deprecated
 114     /// and should be 0.
 115     IMAGE_FILE_BYTES_REVERSED_HI       = 0x8000
 116   };
 117
 118   struct symbol {
 119     char     Name[NameSize];
 120     uint32_t Value;
 121     uint16_t SectionNumber;
 122     uint16_t Type;
 123     uint8_t  StorageClass;
 124     uint8_t  NumberOfAuxSymbols;
 125   };
 126
 127   enum SymbolFlags {
 128     SF_TypeMask = 0x0000FFFF,
 129     SF_TypeShift = 0,
 130
 131     SF_ClassMask = 0x00FF0000,
 132     SF_ClassShift = 16,
 133
 134     SF_WeakExternal = 0x01000000
 135   };
 136
 137   enum SymbolSectionNumber {
 138     IMAGE_SYM_DEBUG     = -2,
 139     IMAGE_SYM_ABSOLUTE  = -1,
 140     IMAGE_SYM_UNDEFINED = 0
 141   };
 142
 143   /// Storage class tells where and what the symbol represents
 144   enum SymbolStorageClass {
 145     SSC_Invalid = 0xff,
 146
 147     IMAGE_SYM_CLASS_END_OF_FUNCTION  = -1,  ///< Physical end of function
 148     IMAGE_SYM_CLASS_NULL             = 0,   ///< No symbol
 149     IMAGE_SYM_CLASS_AUTOMATIC        = 1,   ///< Stack variable
 150     IMAGE_SYM_CLASS_EXTERNAL         = 2,   ///< External symbol
 151     IMAGE_SYM_CLASS_STATIC           = 3,   ///< Static
 152     IMAGE_SYM_CLASS_REGISTER         = 4,   ///< Register variable
 153     IMAGE_SYM_CLASS_EXTERNAL_DEF     = 5,   ///< External definition
 154     IMAGE_SYM_CLASS_LABEL            = 6,   ///< Label
 155     IMAGE_SYM_CLASS_UNDEFINED_LABEL  = 7,   ///< Undefined label
 156     IMAGE_SYM_CLASS_MEMBER_OF_STRUCT = 8,   ///< Member of structure
 157     IMAGE_SYM_CLASS_ARGUMENT         = 9,   ///< Function argument
 158     IMAGE_SYM_CLASS_STRUCT_TAG       = 10,  ///< Structure tag
 159     IMAGE_SYM_CLASS_MEMBER_OF_UNION  = 11,  ///< Member of union
 160     IMAGE_SYM_CLASS_UNION_TAG        = 12,  ///< Union tag
 161     IMAGE_SYM_CLASS_TYPE_DEFINITION  = 13,  ///< Type definition
 162     IMAGE_SYM_CLASS_UNDEFINED_STATIC = 14,  ///< Undefined static
 163     IMAGE_SYM_CLASS_ENUM_TAG         = 15,  ///< Enumeration tag
 164     IMAGE_SYM_CLASS_MEMBER_OF_ENUM   = 16,  ///< Member of enumeration
 165     IMAGE_SYM_CLASS_REGISTER_PARAM   = 17,  ///< Register parameter
 166     IMAGE_SYM_CLASS_BIT_FIELD        = 18,  ///< Bit field
 167     /// ".bb" or ".eb" - beginning or end of block
 168     IMAGE_SYM_CLASS_BLOCK            = 100,
 169     /// ".bf" or ".ef" - beginning or end of function
 170     IMAGE_SYM_CLASS_FUNCTION         = 101,
 171     IMAGE_SYM_CLASS_END_OF_STRUCT    = 102, ///< End of structure
 172     IMAGE_SYM_CLASS_FILE             = 103, ///< File name
 173     /// Line number, reformatted as symbol
 174     IMAGE_SYM_CLASS_SECTION          = 104,
 175     IMAGE_SYM_CLASS_WEAK_EXTERNAL    = 105, ///< Duplicate tag
 176     /// External symbol in dmert public lib
 177     IMAGE_SYM_CLASS_CLR_TOKEN        = 107
 178   };
 179
 180   enum SymbolBaseType {
 181     IMAGE_SYM_TYPE_NULL   = 0,  ///< No type information or unknown base type.
 182     IMAGE_SYM_TYPE_VOID   = 1,  ///< Used with void pointers and functions.
 183     IMAGE_SYM_TYPE_CHAR   = 2,  ///< A character (signed byte).
 184     IMAGE_SYM_TYPE_SHORT  = 3,  ///< A 2-byte signed integer.
 185     IMAGE_SYM_TYPE_INT    = 4,  ///< A natural integer type on the target.
 186     IMAGE_SYM_TYPE_LONG   = 5,  ///< A 4-byte signed integer.
 187     IMAGE_SYM_TYPE_FLOAT  = 6,  ///< A 4-byte floating-point number.
 188     IMAGE_SYM_TYPE_DOUBLE = 7,  ///< An 8-byte floating-point number.
 189     IMAGE_SYM_TYPE_STRUCT = 8,  ///< A structure.
 190     IMAGE_SYM_TYPE_UNION  = 9,  ///< An union.
 191     IMAGE_SYM_TYPE_ENUM   = 10, ///< An enumerated type.
 192     IMAGE_SYM_TYPE_MOE    = 11, ///< A member of enumeration (a specific value).
 193     IMAGE_SYM_TYPE_BYTE   = 12, ///< A byte; unsigned 1-byte integer.
 194     IMAGE_SYM_TYPE_WORD   = 13, ///< A word; unsigned 2-byte integer.
 195     IMAGE_SYM_TYPE_UINT   = 14, ///< An unsigned integer of natural size.
 196     IMAGE_SYM_TYPE_DWORD  = 15  ///< An unsigned 4-byte integer.
 197   };
 198
 199   enum SymbolComplexType {
 200     IMAGE_SYM_DTYPE_NULL     = 0, ///< No complex type; simple scalar variable.
 201     IMAGE_SYM_DTYPE_POINTER  = 1, ///< A pointer to base type.
 202     IMAGE_SYM_DTYPE_FUNCTION = 2, ///< A function that returns a base type.
 203     IMAGE_SYM_DTYPE_ARRAY    = 3, ///< An array of base type.
 204
 205     /// Type is formed as (base + (derived << SCT_COMPLEX_TYPE_SHIFT))
 206     SCT_COMPLEX_TYPE_SHIFT   = 4
 207   };
 208
 209   struct section {
 210     char     Name[NameSize];
 211     uint32_t VirtualSize;
 212     uint32_t VirtualAddress;
 213     uint32_t SizeOfRawData;
 214     uint32_t PointerToRawData;
 215     uint32_t PointerToRelocations;
 216     uint32_t PointerToLineNumbers;
 217     uint16_t NumberOfRelocations;
 218     uint16_t NumberOfLineNumbers;
 219     uint32_t Characteristics;
 220   };
 221
 222   enum SectionCharacteristics {
 223     SC_Invalid = 0xffffffff,
 224
 225     IMAGE_SCN_TYPE_NO_PAD            = 0x00000008,
 226     IMAGE_SCN_CNT_CODE               = 0x00000020,
 227     IMAGE_SCN_CNT_INITIALIZED_DATA   = 0x00000040,
 228     IMAGE_SCN_CNT_UNINITIALIZED_DATA = 0x00000080,
 229     IMAGE_SCN_LNK_OTHER              = 0x00000100,
 230     IMAGE_SCN_LNK_INFO               = 0x00000200,
 231     IMAGE_SCN_LNK_REMOVE             = 0x00000800,
 232     IMAGE_SCN_LNK_COMDAT             = 0x00001000,
 233     IMAGE_SCN_GPREL                  = 0x00008000,
 234     IMAGE_SCN_MEM_PURGEABLE          = 0x00020000,
 235     IMAGE_SCN_MEM_16BIT              = 0x00020000,
 236     IMAGE_SCN_MEM_LOCKED             = 0x00040000,
 237     IMAGE_SCN_MEM_PRELOAD            = 0x00080000,
 238     IMAGE_SCN_ALIGN_1BYTES           = 0x00100000,
 239     IMAGE_SCN_ALIGN_2BYTES           = 0x00200000,
 240     IMAGE_SCN_ALIGN_4BYTES           = 0x00300000,
 241     IMAGE_SCN_ALIGN_8BYTES           = 0x00400000,
 242     IMAGE_SCN_ALIGN_16BYTES          = 0x00500000,
 243     IMAGE_SCN_ALIGN_32BYTES          = 0x00600000,
 244     IMAGE_SCN_ALIGN_64BYTES          = 0x00700000,
 245     IMAGE_SCN_ALIGN_128BYTES         = 0x00800000,
 246     IMAGE_SCN_ALIGN_256BYTES         = 0x00900000,
 247     IMAGE_SCN_ALIGN_512BYTES         = 0x00A00000,
 248     IMAGE_SCN_ALIGN_1024BYTES        = 0x00B00000,
 249     IMAGE_SCN_ALIGN_2048BYTES        = 0x00C00000,
 250     IMAGE_SCN_ALIGN_4096BYTES        = 0x00D00000,
 251     IMAGE_SCN_ALIGN_8192BYTES        = 0x00E00000,
 252     IMAGE_SCN_LNK_NRELOC_OVFL        = 0x01000000,
 253     IMAGE_SCN_MEM_DISCARDABLE        = 0x02000000,
 254     IMAGE_SCN_MEM_NOT_CACHED         = 0x04000000,
 255     IMAGE_SCN_MEM_NOT_PAGED          = 0x08000000,
 256     IMAGE_SCN_MEM_SHARED             = 0x10000000,
 257     IMAGE_SCN_MEM_EXECUTE            = 0x20000000,
 258     IMAGE_SCN_MEM_READ               = 0x40000000,
 259     IMAGE_SCN_MEM_WRITE              = 0x80000000
 260   };
 261
 262   struct relocation {
 263     uint32_t VirtualAddress;
 264     uint32_t SymbolTableIndex;
 265     uint16_t Type;
 266   };
 267
 268   enum RelocationTypeX86 {
 269     IMAGE_REL_I386_ABSOLUTE = 0x0000,
 270     IMAGE_REL_I386_DIR16    = 0x0001,
 271     IMAGE_REL_I386_REL16    = 0x0002,
 272     IMAGE_REL_I386_DIR32    = 0x0006,
 273     IMAGE_REL_I386_DIR32NB  = 0x0007,
 274     IMAGE_REL_I386_SEG12    = 0x0009,
 275     IMAGE_REL_I386_SECTION  = 0x000A,
 276     IMAGE_REL_I386_SECREL   = 0x000B,
 277     IMAGE_REL_I386_TOKEN    = 0x000C,
 278     IMAGE_REL_I386_SECREL7  = 0x000D,
 279     IMAGE_REL_I386_REL32    = 0x0014,
 280
 281     IMAGE_REL_AMD64_ABSOLUTE  = 0x0000,
 282     IMAGE_REL_AMD64_ADDR64    = 0x0001,
 283     IMAGE_REL_AMD64_ADDR32    = 0x0002,
 284     IMAGE_REL_AMD64_ADDR32NB  = 0x0003,
 285     IMAGE_REL_AMD64_REL32     = 0x0004,
 286     IMAGE_REL_AMD64_REL32_1   = 0x0005,
 287     IMAGE_REL_AMD64_REL32_2   = 0x0006,
 288     IMAGE_REL_AMD64_REL32_3   = 0x0007,
 289     IMAGE_REL_AMD64_REL32_4   = 0x0008,
 290     IMAGE_REL_AMD64_REL32_5   = 0x0009,
 291     IMAGE_REL_AMD64_SECTION   = 0x000A,
 292     IMAGE_REL_AMD64_SECREL    = 0x000B,
 293     IMAGE_REL_AMD64_SECREL7   = 0x000C,
 294     IMAGE_REL_AMD64_TOKEN     = 0x000D,
 295     IMAGE_REL_AMD64_SREL32    = 0x000E,
 296     IMAGE_REL_AMD64_PAIR      = 0x000F,
 297     IMAGE_REL_AMD64_SSPAN32   = 0x0010
 298   };
 299
 300   enum RelocationTypesARM {
 301     IMAGE_REL_ARM_ABSOLUTE  = 0x0000,
 302     IMAGE_REL_ARM_ADDR32    = 0x0001,
 303     IMAGE_REL_ARM_ADDR32NB  = 0x0002,
 304     IMAGE_REL_ARM_BRANCH24  = 0x0003,
 305     IMAGE_REL_ARM_BRANCH11  = 0x0004,
 306     IMAGE_REL_ARM_TOKEN     = 0x0005,
 307     IMAGE_REL_ARM_BLX24     = 0x0008,
 308     IMAGE_REL_ARM_BLX11     = 0x0009,
 309     IMAGE_REL_ARM_SECTION   = 0x000E,
 310     IMAGE_REL_ARM_SECREL    = 0x000F,
 311     IMAGE_REL_ARM_MOV32A    = 0x0010,
 312     IMAGE_REL_ARM_MOV32T    = 0x0011,
 313     IMAGE_REL_ARM_BRANCH20T = 0x0012,
 314     IMAGE_REL_ARM_BRANCH24T = 0x0014,
 315     IMAGE_REL_ARM_BLX23T    = 0x0015
 316   };
 317
 318   enum COMDATType {
 319     IMAGE_COMDAT_SELECT_NODUPLICATES = 1,
 320     IMAGE_COMDAT_SELECT_ANY,
 321     IMAGE_COMDAT_SELECT_SAME_SIZE,
 322     IMAGE_COMDAT_SELECT_EXACT_MATCH,
 323     IMAGE_COMDAT_SELECT_ASSOCIATIVE,
 324     IMAGE_COMDAT_SELECT_LARGEST
 325   };
 326
 327   // Auxiliary Symbol Formats
 328   struct AuxiliaryFunctionDefinition {
 329     uint32_t TagIndex;
 330     uint32_t TotalSize;
 331     uint32_t PointerToLinenumber;
 332     uint32_t PointerToNextFunction;
 333     uint8_t  unused[2];
 334   };
 335
 336   struct AuxiliarybfAndefSymbol {
 337     uint8_t  unused1[4];
 338     uint16_t Linenumber;
 339     uint8_t  unused2[6];
 340     uint32_t PointerToNextFunction;
 341     uint8_t  unused3[2];
 342   };
 343
 344   struct AuxiliaryWeakExternal {
 345     uint32_t TagIndex;
 346     uint32_t Characteristics;
 347     uint8_t  unused[10];
 348   };
 349
 350   /// These are not documented in the spec, but are located in WinNT.h.
 351   enum WeakExternalCharacteristics {
 352     IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY = 1,
 353     IMAGE_WEAK_EXTERN_SEARCH_LIBRARY   = 2,
 354     IMAGE_WEAK_EXTERN_SEARCH_ALIAS     = 3
 355   };
 356
 357   struct AuxiliaryFile {
 358     uint8_t FileName[18];
 359   };
 360
 361   struct AuxiliarySectionDefinition {
 362     uint32_t Length;
 363     uint16_t NumberOfRelocations;
 364     uint16_t NumberOfLinenumbers;
 365     uint32_t CheckSum;
 366     uint16_t Number;
 367     uint8_t  Selection;
 368     uint8_t  unused[3];
 369   };
 370
 371   union Auxiliary {
 372     AuxiliaryFunctionDefinition FunctionDefinition;
 373     AuxiliarybfAndefSymbol      bfAndefSymbol;
 374     AuxiliaryWeakExternal       WeakExternal;
 375     AuxiliaryFile               File;
 376     AuxiliarySectionDefinition  SectionDefinition;
 377   };
 378
 379   /// @brief The Import Directory Table.
 380   ///
 381   /// There is a single array of these and one entry per imported DLL.
 382   struct ImportDirectoryTableEntry {
 383     uint32_t ImportLookupTableRVA;
 384     uint32_t TimeDateStamp;
 385     uint32_t ForwarderChain;
 386     uint32_t NameRVA;
 387     uint32_t ImportAddressTableRVA;
 388   };
 389
 390   /// @brief The PE32 Import Lookup Table.
 391   ///
 392   /// There is an array of these for each imported DLL. It represents either
 393   /// the ordinal to import from the target DLL, or a name to lookup and import
 394   /// from the target DLL.
 395   ///
 396   /// This also happens to be the same format used by the Import Address Table
 397   /// when it is initially written out to the image.
 398   struct ImportLookupTableEntry32 {
 399     uint32_t data;
 400
 401     /// @brief Is this entry specified by ordinal, or name?
 402     bool isOrdinal() const { return data & 0x80000000; }
 403
 404     /// @brief Get the ordinal value of this entry. isOrdinal must be true.
 405     uint16_t getOrdinal() const {
 406       assert(isOrdinal() && "ILT entry is not an ordinal!");
 407       return data & 0xFFFF;
 408     }
 409
 410     /// @brief Set the ordinal value and set isOrdinal to true.
 411     void setOrdinal(uint16_t o) {
 412       data = o;
 413       data |= 0x80000000;
 414     }
 415
 416     /// @brief Get the Hint/Name entry RVA. isOrdinal must be false.
 417     uint32_t getHintNameRVA() const {
 418       assert(!isOrdinal() && "ILT entry is not a Hint/Name RVA!");
 419       return data;
 420     }
 421
 422     /// @brief Set the Hint/Name entry RVA and set isOrdinal to false.
 423     void setHintNameRVA(uint32_t rva) { data = rva; }
 424   };
 425
 426   /// @brief The DOS compatible header at the front of all PEs.
 427   struct DOSHeader {
 428     uint16_t Magic;
 429     uint16_t UsedBytesInTheLastPage;
 430     uint16_t FileSizeInPages;
 431     uint16_t NumberOfRelocationItems;
 432     uint16_t HeaderSizeInParagraphs;
 433     uint16_t MinimumExtraParagraphs;
 434     uint16_t MaximumExtraParagraphs;
 435     uint16_t InitialRelativeSS;
 436     uint16_t InitialSP;
 437     uint16_t Checksum;
 438     uint16_t InitialIP;
 439     uint16_t InitialRelativeCS;
 440     uint16_t AddressOfRelocationTable;
 441     uint16_t OverlayNumber;
 442     uint16_t Reserved[4];
 443     uint16_t OEMid;
 444     uint16_t OEMinfo;
 445     uint16_t Reserved2[10];
 446     uint32_t AddressOfNewExeHeader;
 447   };
 448
 449   struct PEHeader {
 450     uint32_t Signature;
 451     header COFFHeader;
 452     uint16_t Magic;
 453     uint8_t  MajorLinkerVersion;
 454     uint8_t  MinorLinkerVersion;
 455     uint32_t SizeOfCode;
 456     uint32_t SizeOfInitializedData;
 457     uint32_t SizeOfUninitializedData;
 458     uint32_t AddressOfEntryPoint; // RVA
 459     uint32_t BaseOfCode; // RVA
 460     uint32_t BaseOfData; // RVA
 461     uint64_t ImageBase;
 462     uint32_t SectionAlignment;
 463     uint32_t FileAlignment;
 464     uint16_t MajorOperatingSystemVersion;
 465     uint16_t MinorOperatingSystemVersion;
 466     uint16_t MajorImageVersion;
 467     uint16_t MinorImageVersion;
 468     uint16_t MajorSubsystemVersion;
 469     uint16_t MinorSubsystemVersion;
 470     uint32_t Win32VersionValue;
 471     uint32_t SizeOfImage;
 472     uint32_t SizeOfHeaders;
 473     uint32_t CheckSum;
 474     uint16_t Subsystem;
 475     uint16_t DLLCharacteristics;
 476     uint64_t SizeOfStackReserve;
 477     uint64_t SizeOfStackCommit;
 478     uint64_t SizeOfHeapReserve;
 479     uint64_t SizeOfHeapCommit;
 480     uint32_t LoaderFlags;
 481     uint32_t NumberOfRvaAndSize;
 482   };
 483
 484   struct DataDirectory {
 485     uint32_t RelativeVirtualAddress;
 486     uint32_t Size;
 487   };
 488
 489   enum WindowsSubsystem {
 490     IMAGE_SUBSYSTEM_UNKNOWN = 0, ///< An unknown subsystem.
 491     IMAGE_SUBSYSTEM_NATIVE = 1, ///< Device drivers and native Windows processes
 492     IMAGE_SUBSYSTEM_WINDOWS_GUI = 2, ///< The Windows GUI subsystem.
 493     IMAGE_SUBSYSTEM_WINDOWS_CUI = 3, ///< The Windows character subsystem.
 494     IMAGE_SUBSYSTEM_POSIX_CUI = 7, ///< The POSIX character subsystem.
 495     IMAGE_SUBSYSTEM_WINDOWS_CE_GUI = 9, ///< Windows CE.
 496     IMAGE_SUBSYSTEM_EFI_APPLICATION = 10, ///< An EFI application.
 497     IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER = 11, ///< An EFI driver with boot
 498                                                   ///  services.
 499     IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER = 12, ///< An EFI driver with run-time
 500                                              ///  services.
 501     IMAGE_SUBSYSTEM_EFI_ROM = 13, ///< An EFI ROM image.
 502     IMAGE_SUBSYSTEM_XBOX = 14 ///< XBOX.
 503   };
 504
 505   enum DLLCharacteristics {
 506     /// DLL can be relocated at load time.
 507     IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE = 0x0040,
 508     /// Code integrity checks are enforced.
 509     IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY = 0x0080,
 510     IMAGE_DLL_CHARACTERISTICS_NX_COMPAT = 0x0100, ///< Image is NX compatible.
 511     /// Isolation aware, but do not isolate the image.
 512     IMAGE_DLL_CHARACTERISTICS_NO_ISOLATION = 0x0200,
 513     /// Does not use structured exception handling (SEH). No SEH handler may be
 514     /// called in this image.
 515     IMAGE_DLL_CHARACTERISTICS_NO_SEH = 0x0400,
 516     /// Do not bind the image.
 517     IMAGE_DLL_CHARACTERISTICS_NO_BIND = 0x0800,
 518     IMAGE_DLL_CHARACTERISTICS_WDM_DRIVER = 0x2000, ///< A WDM driver.
 519     /// Terminal Server aware.
 520     IMAGE_DLL_CHARACTERISTICS_TERMINAL_SERVER_AWARE = 0x8000
 521   };
 522
 523   enum DebugType {
 524     IMAGE_DEBUG_TYPE_UNKNOWN       = 0,
 525     IMAGE_DEBUG_TYPE_COFF          = 1,
 526     IMAGE_DEBUG_TYPE_CODEVIEW      = 2,
 527     IMAGE_DEBUG_TYPE_FPO           = 3,
 528     IMAGE_DEBUG_TYPE_MISC          = 4,
 529     IMAGE_DEBUG_TYPE_EXCEPTION     = 5,
 530     IMAGE_DEBUG_TYPE_FIXUP         = 6,
 531     IMAGE_DEBUG_TYPE_OMAP_TO_SRC   = 7,
 532     IMAGE_DEBUG_TYPE_OMAP_FROM_SRC = 8,
 533     IMAGE_DEBUG_TYPE_BORLAND       = 9,
 534     IMAGE_DEBUG_TYPE_CLSID         = 11
 535   };
 536
 537   enum BaseRelocationType {
 538     IMAGE_REL_BASED_ABSOLUTE       = 0,
 539     IMAGE_REL_BASED_HIGH           = 1,
 540     IMAGE_REL_BASED_LOW            = 2,
 541     IMAGE_REL_BASED_HIGHLOW        = 3,
 542     IMAGE_REL_BASED_HIGHADJ        = 4,
 543     IMAGE_REL_BASED_MIPS_JMPADDR   = 5,
 544     IMAGE_REL_BASED_ARM_MOV32A     = 5,
 545     IMAGE_REL_BASED_ARM_MOV32T     = 7,
 546     IMAGE_REL_BASED_MIPS_JMPADDR16 = 9,
 547     IMAGE_REL_BASED_DIR64          = 10
 548   };
 549
 550   enum ImportType {
 551     IMPORT_CODE  = 0,
 552     IMPORT_DATA  = 1,
 553     IMPORT_CONST = 2
 554   };
 555
 556   enum ImportNameType {
 557     /// Import is by ordinal. This indicates that the value in the Ordinal/Hint
 558     /// field of the import header is the import's ordinal. If this constant is
 559     /// not specified, then the Ordinal/Hint field should always be interpreted
 560     /// as the import's hint.
 561     IMPORT_ORDINAL         = 0,
 562     /// The import name is identical to the public symbol name
 563     IMPORT_NAME            = 1,
 564     /// The import name is the public symbol name, but skipping the leading ?,
 565     /// @, or optionally _.
 566     IMPORT_NAME_NOPREFIX   = 2,
 567     /// The import name is the public symbol name, but skipping the leading ?,
 568     /// @, or optionally _, and truncating at the first @.
 569     IMPORT_NAME_UNDECORATE = 3
 570   };
 571
 572   struct ImportHeader {
 573     uint16_t Sig1; ///< Must be IMAGE_FILE_MACHINE_UNKNOWN (0).
 574     uint16_t Sig2; ///< Must be 0xFFFF.
 575     uint16_t Version;
 576     uint16_t Machine;
 577     uint32_t TimeDateStamp;
 578     uint32_t SizeOfData;
 579     uint16_t OrdinalHint;
 580     uint16_t TypeInfo;
 581
 582     ImportType getType() const {
 583       return static_cast<ImportType>(TypeInfo & 0x3);
 584     }
 585
 586     ImportNameType getNameType() const {
 587       return static_cast<ImportNameType>((TypeInfo & 0x1C) >> 3);
 588     }
 589   };
 590
 591 } // End namespace COFF.
 592 } // End namespace llvm.
 593
 594 #endif