chku32(uint32(i32), ci32&0xffffffff)
	chku32(uint32(i64), ci64&0xffffffff)
	chku32(uint32(u8), cu8&0xffffffff)
	chku32(uint32(u16), cu16&0xffffffff)
	chku32(uint32(u32), cu32&0xffffffff)
	chku32(uint32(u64), cu64&0xffffffff)
	//	chku32(uint32(f32), 0)
	//	chku32(uint32(f64), 0)

	chku64(uint64(i8), ci8&0xffffffffffffffff)
	chku64(uint64(i16), ci16&0xffffffffffffffff)
	chku64(uint64(i32), ci32&0xffffffffffffffff)

pkg debug/elf, method (R_MIPS) GoString() string
pkg debug/elf, method (R_MIPS) String() string
pkg debug/elf, type Chdr32 struct
pkg debug/elf, type Chdr32 struct, Addralign uint32
pkg debug/elf, type Chdr32 struct, Size uint32
pkg debug/elf, type Chdr32 struct, Type uint32
pkg debug/elf, type Chdr64 struct
pkg debug/elf, type Chdr64 struct, Addralign uint64
pkg debug/elf, type Chdr64 struct, Size uint64

func (b *block) getFormat() Format {
	// Verify checksum.
	var p parser
	value := p.parseOctal(b.toV7().chksum())
	chksum1, chksum2 := b.computeChecksum()
	if p.err != nil || (value != chksum1 && value != chksum2) {
		return FormatUnknown
	}

	// Guess the magic values.
	magic := string(b.toUSTAR().magic())
	version := string(b.toUSTAR().version())

		if s.Flags&SHF_COMPRESSED == 0 {
			s.ReaderAt = s.sr
			s.Size = s.FileSize
		} else {
			// Read the compression header.
			switch f.Class {
			case ELFCLASS32:
				var ch Chdr32
				chdata := make([]byte, unsafe.Sizeof(ch))
				if _, err := s.sr.ReadAt(chdata, 0); err != nil {
					return nil, err
				}
				s.compressionType = CompressionType(bo.Uint32(chdata[unsafe.Offsetof(ch.Type):]))

// ELF32 Dynamic structure. The ".dynamic" section contains an array of them.
type Dyn32 struct {
	Tag int32  /* Entry type. */
	Val uint32 /* Integer/Address value. */
}

// ELF32 Compression header.
type Chdr32 struct {
	Type      uint32
	Size      uint32
	Addralign uint32
}

/*
 * Relocation entries.
 */

// ELF32 Relocations that don't need an addend field.
type Rel32 struct {

		{"COMPRESS_HIPROC", Const, 6},
		{"COMPRESS_LOOS", Const, 6},
		{"COMPRESS_LOPROC", Const, 6},
		{"COMPRESS_ZLIB", Const, 6},
		{"COMPRESS_ZSTD", Const, 21},
		{"Chdr32", Type, 6},
		{"Chdr32.Addralign", Field, 6},
		{"Chdr32.Size", Field, 6},
		{"Chdr32.Type", Field, 6},
		{"Chdr64", Type, 6},
		{"Chdr64.Addralign", Field, 6},
		{"Chdr64.Size", Field, 6},
		{"Chdr64.Type", Field, 6},
		{"Class", Type, 0},

				Type:      uint32(elf.COMPRESS_ZLIB),
				Size:      uint64(total),
				Addralign: uint64(ctxt.Arch.Alignment),
			})
		case 4:
			binary.Write(&buf, ctxt.Arch.ByteOrder, elf.Chdr32{
				Type:      uint32(elf.COMPRESS_ZLIB),
				Size:      uint32(total),
				Addralign: uint32(ctxt.Arch.Alignment),
			})
		default:
			log.Fatalf("can't compress header size:%d", ctxt.Arch.PtrSize)
		}