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      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
    595