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Contents: 
enum EFI_FV_FILETYPE : __int8
{
  EFI_FV_FILETYPE_ALL = 0x0,
  EFI_FV_FILETYPE_BIN = 0x1,
  EFI_FV_FILETYPE_SECTION = 0x2,
  EFI_FV_FILETYPE_CEIMAIN = 0x3,
  EFI_FV_FILETYPE_PEIMAIN = 0x4,
  EFI_FV_FILETYPE_DXEMAIN = 0x5,
  EFI_FV_FILETYPE_PEI = 0x6,
  EFI_FV_FILETYPE_DXE = 0x7,
  EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER = 0x8,
  EFI_FV_FILETYPE_APP = 0x9,
  EFI_FV_FILETYPE_FFV = 0xB,
  EFI_FV_FILETYPE_CEI = 0xC2,
  EFI_FV_FILETYPE_XIP = 0xC3,
  EFI_FV_FILETYPE_BB = 0xC4,
  EFI_FV_FILETYPE_SDXE = 0xD0,
  EFI_FV_FILETYPE_DXESDXE = 0xD1,
  EFI_FV_FILETYPE_GAP = 0xF0,
};

enum EFI_SECTION_TYPE
{
  EFI_SECTION_ALL = 0x0,
  EFI_SECTION_COMPRESSION = 0x1,
  EFI_SECTION_GUID_DEFINED = 0x2,
  EFI_SECTION_PE32 = 0x10,
  EFI_SECTION_PIC = 0x11,
  EFI_SECTION_TE = 0x12,
  EFI_SECTION_DXE_DEPEX = 0x13,
  EFI_SECTION_VERSION = 0x14,
  EFI_SECTION_USER_INTERFACE = 0x15,
  EFI_SECTION_COMPATIBILITY16 = 0x16,
  EFI_SECTION_FIRMWARE_VOLUME_IMAGE = 0x17,
  EFI_SECTION_FREEFORM_SUBTYPE_GUID = 0x18,
  EFI_SECTION_BIN = 0x19,
  EFI_SECTION_PE64 = 0x1A,
  EFI_SECTION_PEI_DEPEX = 0x1B,
  EFI_SECTION_SOURCECODE = 0xC0,
  EFI_SECTION_FFV = 0xC1,
  EFI_SECTION_RE32 = 0xC2,
  EFI_SECTION_XIP16 = 0xC3,
  EFI_SECTION_XIP32 = 0xC4,
  EFI_SECTION_XIP64 = 0xC5,
  EFI_SECTION_PLACE16 = 0xC6,
  EFI_SECTION_PLACE32 = 0xC7,
  EFI_SECTION_PLACE64 = 0xC8,
  EFI_SECTION_PCI_DEVICE = 0xCF,
  EFI_SECTION_PDB = 0xD0,
};

struct FlashFileHeader
{
  uint8 FileState;
  uint8 Flags;
  uint8 HeaderChecksum;
  uint8 DataChecksum;
  DWORD SizeAndType;
  UUID GuidName;
};

struct VolumeDirHeader
{
  int field_0;
  int totalSize;
};
struct VolumeDirEntry
{
  UUID volumeGuid;
  _DWORD volumeStart;
  _DWORD volumeSize;
};


file types
 C3 = XIP?
 60 = uncompressed file?
   0x10 = uncompressed PE
   0xC4 = peim stub? ( dxedep + entry pointer)
 70 = compressed file?
   0x01 = EFI_SECTION_COMPRESSION
 10 = 16-bit code?
 F0 = padding

 sections
   0x10 uncompressed PE