SIGNATURE_16
#define SIGNATURE_32(A, B, C, D) (SIGNATURE_16 (A, B) | (SIGNATURE_16 (C, D) << 16))
#define EFI_IMAGE_DOS_SIGNATURE SIGNATURE_16('M', 'Z')
#define EFI_IMAGE_OS2_SIGNATURE SIGNATURE_16('N', 'E')
#define EFI_IMAGE_OS2_SIGNATURE_LE SIGNATURE_16('L', 'E')
#define EFI_TE_IMAGE_HEADER_SIGNATURE SIGNATURE_16('V', 'Z')