// ELF64 Dynamic structure. The ".dynamic" section contains an array of them.
type Dyn64 struct {
	Tag int64  /* Entry type. */
	Val uint64 /* Integer/address value */
}

// ELF64 Compression header.
type Chdr64 struct {
	Type      uint32
	_         uint32 /* Reserved. */
	Size      uint64
	Addralign uint64
}

/*
 * Relocation entries.
 */

	for _, sym := range syms {
		total += ldr.SymSize(sym)
	}

	var buf bytes.Buffer
	if ctxt.IsELF {
		switch ctxt.Arch.PtrSize {
		case 8:
			binary.Write(&buf, ctxt.Arch.ByteOrder, elf.Chdr64{
				Type:      uint32(elf.COMPRESS_ZLIB),
				Size:      uint64(total),
				Addralign: uint64(ctxt.Arch.Alignment),
			})
		case 4:
			binary.Write(&buf, ctxt.Arch.ByteOrder, elf.Chdr32{