fd := funcDesc{}
	b.tmp = b.tmp[:0]
	b.tmp = uleb128.AppendUleb128(b.tmp, uint(len(f.Units)))
	b.tmp = uleb128.AppendUleb128(b.tmp, uint(b.stab.Lookup(f.Funcname)))
	b.tmp = uleb128.AppendUleb128(b.tmp, uint(b.stab.Lookup(f.Srcfile)))
	for _, u := range f.Units {
		b.tmp = uleb128.AppendUleb128(b.tmp, uint(u.StLine))
		b.tmp = uleb128.AppendUleb128(b.tmp, uint(u.StCol))
		b.tmp = uleb128.AppendUleb128(b.tmp, uint(u.EnLine))

	akeys := make([]string, 0, len(args))
	for k := range args {
		akeys = append(akeys, k)
	}
	slices.Sort(akeys)

	wrULEB128 := func(v uint) error {
		cfw.tmp = cfw.tmp[:0]
		cfw.tmp = uleb128.AppendUleb128(cfw.tmp, v)
		if _, err := ws.Write(cfw.tmp); err != nil {
			return err
		}
		return nil
	}

	// Count of arg pairs.
	if err := wrULEB128(uint(len(args))); err != nil {
		return err
	}