hdr, err := x.ReadData(addr, uint64(2*ptrSize))
	if err != nil || len(hdr) < 2*ptrSize {
		return ""
	}
	dataAddr := readPtr(hdr)
	dataLen := readPtr(hdr[ptrSize:])
	data, err := x.ReadData(dataAddr, dataLen)
	if err != nil || uint64(len(data)) < dataLen {
		return ""
	}
	return string(data)
}

// elfExe is the ELF implementation of the exe interface.
type elfExe struct {
	f *elf.File
}

			listSym.WriteCURelativeAddr(ctxt, listSym.Size, startPC, int64(end))
		}

		i += 2 * ctxt.Arch.PtrSize
		datalen := 2 + int(ctxt.Arch.ByteOrder.Uint16(list[i:]))
		listSym.WriteBytes(ctxt, listSym.Size, list[i:i+datalen]) // copy datalen and location encoding
		i += datalen
	}

	// Location list contents, now with real PCs.
	// End entry.
	listSym.WriteInt(ctxt, listSym.Size, ctxt.Arch.PtrSize, 0)

	WeakBindOff, WeakBindLen uint32
	LazyBindOff, LazyBindLen uint32
	ExportOff, ExportLen     uint32
}

type linkEditDataCmd struct {
	Cmd              macho.LoadCmd
	Len              uint32
	DataOff, DataLen uint32
}

type encryptionInfoCmd struct {
	Cmd                macho.LoadCmd
	Len                uint32
	CryptOff, CryptLen uint32
	CryptId            uint32
}

type uuidCmd struct {
	Cmd  macho.LoadCmd

	Yday  int32
	Isdst int32
}

type RTCWkAlrm struct {
	Enabled uint8
	Pending uint8
	Time    RTCTime
}

type BlkpgIoctlArg struct {
	Op      int32
	Flags   int32
	Datalen int32
	Data    *byte
}

const (
	BLKPG_ADD_PARTITION    = 0x1
	BLKPG_DEL_PARTITION    = 0x2
	BLKPG_RESIZE_PARTITION = 0x3
)

const (
	NETNSA_NONE         = 0x0