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))