p := ldr.Data(symIdx)
	if p == nil {
		panic(fmt.Sprintf("missing symbol %q", ldr.SymName(symIdx)))
	}
	if decodetypeKind(arch, p) != abi.Interface {
		panic(fmt.Sprintf("symbol %q is not an interface", ldr.SymName(symIdx)))
	}
	relocs := ldr.Relocs(symIdx)
	var m methodsig
	m.name = decodetypeName(ldr, symIdx, &relocs, int(off))

func uncommonSize(arch *sys.Arch) int    { return int(abi.UncommonSize()) }           // runtime.uncommontype

// Type.commonType.kind
func decodetypeKind(arch *sys.Arch, p []byte) abi.Kind {
	return abi.Kind(p[2*arch.PtrSize+7]) & abi.KindMask //  0x13 / 0x1f
}

// Type.commonType.kind
func decodetypeUsegcprog(arch *sys.Arch, p []byte) bool {

	sn := d.ldr.SymName(gotype)
	name := sn[5:] // could also decode from Type.string
	tdata := d.ldr.Data(gotype)
	if len(tdata) == 0 {
		d.linkctxt.Errorf(gotype, "missing type")
	}
	kind := decodetypeKind(d.arch, tdata)
	bytesize := decodetypeSize(d.arch, tdata)

	var die, typedefdie *dwarf.DWDie
	switch kind {
	case abi.Bool:
		die = d.newdie(&dwtypes, dwarf.DW_ABRV_BASETYPE, name)