path: root/include/llvm/Support/COFF.h

//===-- llvm/Support/COFF.h -------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains an definitions used in Windows COFF Files.
//
// Structures and enums defined within this file where created using
// information from Microsoft's publicly available PE/COFF format document:
//
// Microsoft Portable Executable and Common Object File Format Specification
// Revision 8.1 - February 15, 2008
//
// As of 5/2/2010, hosted by Microsoft at:
// http://www.microsoft.com/whdc/system/platform/firmware/pecoff.mspx
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_COFF_H
#define LLVM_SUPPORT_COFF_H

#include "llvm/Support/DataTypes.h"
#include <cassert>
#include <cstring>

namespace llvm {
namespace COFF {

  // Sizes in bytes of various things in the COFF format.
  enum {
    HeaderSize     = 20,
    NameSize       = 8,
    SymbolSize     = 18,
    SectionSize    = 40,
    RelocationSize = 10
  };

  struct header {
    uint16_t Machine;
    uint16_t NumberOfSections;
    uint32_t TimeDateStamp;
    uint32_t PointerToSymbolTable;
    uint32_t NumberOfSymbols;
    uint16_t SizeOfOptionalHeader;
    uint16_t Characteristics;
  };

  enum MachineTypes {
    MT_Invalid = 0xffff,

    IMAGE_FILE_MACHINE_UNKNOWN   = 0x0,
    IMAGE_FILE_MACHINE_AM33      = 0x13,
    IMAGE_FILE_MACHINE_AMD64     = 0x8664,
    IMAGE_FILE_MACHINE_ARM       = 0x1C0,
    IMAGE_FILE_MACHINE_ARMV7     = 0x1C4,
    IMAGE_FILE_MACHINE_EBC       = 0xEBC,
    IMAGE_FILE_MACHINE_I386      = 0x14C,
    IMAGE_FILE_MACHINE_IA64      = 0x200,
    IMAGE_FILE_MACHINE_M32R      = 0x9041,
    IMAGE_FILE_MACHINE_MIPS16    = 0x266,
    IMAGE_FILE_MACHINE_MIPSFPU   = 0x366,
    IMAGE_FILE_MACHINE_MIPSFPU16 = 0x466,
    IMAGE_FILE_MACHINE_POWERPC   = 0x1F0,
    IMAGE_FILE_MACHINE_POWERPCFP = 0x1F1,
    IMAGE_FILE_MACHINE_R4000     = 0x166,
    IMAGE_FILE_MACHINE_SH3       = 0x1A2,
    IMAGE_FILE_MACHINE_SH3DSP    = 0x1A3,
    IMAGE_FILE_MACHINE_SH4       = 0x1A6,
    IMAGE_FILE_MACHINE_SH5       = 0x1A8,
    IMAGE_FILE_MACHINE_THUMB     = 0x1C2,
    IMAGE_FILE_MACHINE_WCEMIPSV2 = 0x169
  };

  enum Characteristics {
    C_Invalid = 0,

    /// The file does not contain base relocations and must be loaded at its
    /// preferred base. If this cannot be done, the loader will error.
    IMAGE_FILE_RELOCS_STRIPPED         = 0x0001,
    /// The file is valid and can be run.
    IMAGE_FILE_EXECUTABLE_IMAGE        = 0x0002,
    /// COFF line numbers have been stripped. This is deprecated and should be
    /// 0.
    IMAGE_FILE_LINE_NUMS_STRIPPED      = 0x0004,
    /// COFF symbol table entries for local symbols have been removed. This is
    /// deprecated and should be 0.
    IMAGE_FILE_LOCAL_SYMS_STRIPPED     = 0x0008,
    /// Aggressively trim working set. This is deprecated and must be 0.
    IMAGE_FILE_AGGRESSIVE_WS_TRIM      = 0x0010,
    /// Image can handle > 2GiB addresses.
    IMAGE_FILE_LARGE_ADDRESS_AWARE     = 0x0020,
    /// Little endian: the LSB precedes the MSB in memory. This is deprecated
    /// and should be 0.
    IMAGE_FILE_BYTES_REVERSED_LO       = 0x0080,
    /// Machine is based on a 32bit word architecture.
    IMAGE_FILE_32BIT_MACHINE           = 0x0100,
    /// Debugging info has been removed.
    IMAGE_FILE_DEBUG_STRIPPED          = 0x0200,
    /// If the image is on removable media, fully load it and copy it to swap.
    IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP = 0x0400,
    /// If the image is on network media, fully load it and copy it to swap.
    IMAGE_FILE_NET_RUN_FROM_SWAP       = 0x0800,
    /// The image file is a system file, not a user program.
    IMAGE_FILE_SYSTEM                  = 0x1000,
    /// The image file is a DLL.
    IMAGE_FILE_DLL                     = 0x2000,
    /// This file should only be run on a uniprocessor machine.
    IMAGE_FILE_UP_SYSTEM_ONLY          = 0x4000,
    /// Big endian: the MSB precedes the LSB in memory. This is deprecated
    /// and should be 0.
    IMAGE_FILE_BYTES_REVERSED_HI       = 0x8000
  };

  struct symbol {
    char     Name[NameSize];
    uint32_t Value;
    uint16_t SectionNumber;
    uint16_t Type;
    uint8_t  StorageClass;
    uint8_t  NumberOfAuxSymbols;
  };

  enum SymbolFlags {
    SF_TypeMask = 0x0000FFFF,
    SF_TypeShift = 0,

    SF_ClassMask = 0x00FF0000,
    SF_ClassShift = 16,

    SF_WeakExternal = 0x01000000
  };

  enum SymbolSectionNumber {
    IMAGE_SYM_DEBUG     = -2,
    IMAGE_SYM_ABSOLUTE  = -1,
    IMAGE_SYM_UNDEFINED = 0
  };

  /// Storage class tells where and what the symbol represents
  enum SymbolStorageClass {
    SSC_Invalid = 0xff,

    IMAGE_SYM_CLASS_END_OF_FUNCTION  = -1,  ///< Physical end of function
    IMAGE_SYM_CLASS_NULL             = 0,   ///< No symbol
    IMAGE_SYM_CLASS_AUTOMATIC        = 1,   ///< Stack variable
    IMAGE_SYM_CLASS_EXTERNAL         = 2,   ///< External symbol
    IMAGE_SYM_CLASS_STATIC           = 3,   ///< Static
    IMAGE_SYM_CLASS_REGISTER         = 4,   ///< Register variable
    IMAGE_SYM_CLASS_EXTERNAL_DEF     = 5,   ///< External definition
    IMAGE_SYM_CLASS_LABEL            = 6,   ///< Label
    IMAGE_SYM_CLASS_UNDEFINED_LABEL  = 7,   ///< Undefined label
    IMAGE_SYM_CLASS_MEMBER_OF_STRUCT = 8,   ///< Member of structure
    IMAGE_SYM_CLASS_ARGUMENT         = 9,   ///< Function argument
    IMAGE_SYM_CLASS_STRUCT_TAG       = 10,  ///< Structure tag
    IMAGE_SYM_CLASS_MEMBER_OF_UNION  = 11,  ///< Member of union
    IMAGE_SYM_CLASS_UNION_TAG        = 12,  ///< Union tag
    IMAGE_SYM_CLASS_TYPE_DEFINITION  = 13,  ///< Type definition
    IMAGE_SYM_CLASS_UNDEFINED_STATIC = 14,  ///< Undefined static
    IMAGE_SYM_CLASS_ENUM_TAG         = 15,  ///< Enumeration tag
    IMAGE_SYM_CLASS_MEMBER_OF_ENUM   = 16,  ///< Member of enumeration
    IMAGE_SYM_CLASS_REGISTER_PARAM   = 17,  ///< Register parameter
    IMAGE_SYM_CLASS_BIT_FIELD        = 18,  ///< Bit field
    /// ".bb" or ".eb" - beginning or end of block
    IMAGE_SYM_CLASS_BLOCK            = 100,
    /// ".bf" or ".ef" - beginning or end of function
    IMAGE_SYM_CLASS_FUNCTION         = 101,
    IMAGE_SYM_CLASS_END_OF_STRUCT    = 102, ///< End of structure
    IMAGE_SYM_CLASS_FILE             = 103, ///< File name
    /// Line number, reformatted as symbol
    IMAGE_SYM_CLASS_SECTION          = 104,
    IMAGE_SYM_CLASS_WEAK_EXTERNAL    = 105, ///< Duplicate tag
    /// External symbol in dmert public lib
    IMAGE_SYM_CLASS_CLR_TOKEN        = 107
  };

  enum SymbolBaseType {
    IMAGE_SYM_TYPE_NULL   = 0,  ///< No type information or unknown base type.
    IMAGE_SYM_TYPE_VOID   = 1,  ///< Used with void pointers and functions.
    IMAGE_SYM_TYPE_CHAR   = 2,  ///< A character (signed byte).
    IMAGE_SYM_TYPE_SHORT  = 3,  ///< A 2-byte signed integer.
    IMAGE_SYM_TYPE_INT    = 4,  ///< A natural integer type on the target.
    IMAGE_SYM_TYPE_LONG   = 5,  ///< A 4-byte signed integer.
    IMAGE_SYM_TYPE_FLOAT  = 6,  ///< A 4-byte floating-point number.
    IMAGE_SYM_TYPE_DOUBLE = 7,  ///< An 8-byte floating-point number.
    IMAGE_SYM_TYPE_STRUCT = 8,  ///< A structure.
    IMAGE_SYM_TYPE_UNION  = 9,  ///< An union.
    IMAGE_SYM_TYPE_ENUM   = 10, ///< An enumerated type.
    IMAGE_SYM_TYPE_MOE    = 11, ///< A member of enumeration (a specific value).
    IMAGE_SYM_TYPE_BYTE   = 12, ///< A byte; unsigned 1-byte integer.
    IMAGE_SYM_TYPE_WORD   = 13, ///< A word; unsigned 2-byte integer.
    IMAGE_SYM_TYPE_UINT   = 14, ///< An unsigned integer of natural size.
    IMAGE_SYM_TYPE_DWORD  = 15  ///< An unsigned 4-byte integer.
  };

  enum SymbolComplexType {
    IMAGE_SYM_DTYPE_NULL     = 0, ///< No complex type; simple scalar variable.
    IMAGE_SYM_DTYPE_POINTER  = 1, ///< A pointer to base type.
    IMAGE_SYM_DTYPE_FUNCTION = 2, ///< A function that returns a base type.
    IMAGE_SYM_DTYPE_ARRAY    = 3, ///< An array of base type.

    /// Type is formed as (base + (derived << SCT_COMPLEX_TYPE_SHIFT))
    SCT_COMPLEX_TYPE_SHIFT   = 4
  };

  struct section {
    char     Name[NameSize];
    uint32_t VirtualSize;
    uint32_t VirtualAddress;
    uint32_t SizeOfRawData;
    uint32_t PointerToRawData;
    uint32_t PointerToRelocations;
    uint32_t PointerToLineNumbers;
    uint16_t NumberOfRelocations;
    uint16_t NumberOfLineNumbers;
    uint32_t Characteristics;
  };

  enum SectionCharacteristics {
    SC_Invalid = 0xffffffff,

    IMAGE_SCN_TYPE_NO_PAD            = 0x00000008,
    IMAGE_SCN_CNT_CODE               = 0x00000020,
    IMAGE_SCN_CNT_INITIALIZED_DATA   = 0x00000040,
    IMAGE_SCN_CNT_UNINITIALIZED_DATA = 0x00000080,
    IMAGE_SCN_LNK_OTHER              = 0x00000100,
    IMAGE_SCN_LNK_INFO               = 0x00000200,
    IMAGE_SCN_LNK_REMOVE             = 0x00000800,
    IMAGE_SCN_LNK_COMDAT             = 0x00001000,
    IMAGE_SCN_GPREL                  = 0x00008000,
    IMAGE_SCN_MEM_PURGEABLE          = 0x00020000,
    IMAGE_SCN_MEM_16BIT              = 0x00020000,
    IMAGE_SCN_MEM_LOCKED             = 0x00040000,
    IMAGE_SCN_MEM_PRELOAD            = 0x00080000,
    IMAGE_SCN_ALIGN_1BYTES           = 0x00100000,
    IMAGE_SCN_ALIGN_2BYTES           =