if bytes.HasPrefix(data, []byte{0x01, 0xDF}) || bytes.HasPrefix(data, []byte{0x01, 0xF7}) {
	e, err := xcoff.NewFile(r)
	if err != nil {
		return nil, err
	}
	return &xcoffExe{e}, nil
}

// xcoffExe is the XCOFF (AIX eXtended COFF) implementation of the exe interface.
type xcoffExe struct {
	f  *xcoff.File
}

func (x *xcoffExe) ReadData(addr, size uint64) ([]byte, error) {
	for _, sect := range x.f.Sections {
		if uint64(sect.VirtualAddress) <= addr && addr <= uint64(sect.VirtualAddress+sect.Size-1) {
			n := uint64(sect.VirtualAddress+sect.Size) - addr
			if n > size {
				n = size
			}
			data := make([]byte, n)
			_, err := sect.ReadAt(data, int64(addr-uint64(sect.VirtualAddress)))
			if err != nil {
				return nil, err
			}
			return data, nil
		}
	}
	return nil, fmt.Errorf("address not mapped")
}

func (x *xcoffExe) DataStart() uint64 {
	return x.f.SectionByType(xcoff.STYP_DATA).VirtualAddress
}