// param controls the maximum number of results returned; if "limit"
// is -1, then all undefs are returned.
func (l *Loader) UndefinedRelocTargets(limit int) ([]Sym, []Sym) {
	result, fromr := []Sym{}, []Sym{}
outerloop:
	for si := Sym(1); si < Sym(len(l.objSyms)); si++ {
		relocs := l.Relocs(si)
		for ri := 0; ri < relocs.Count(); ri++ {
			r := relocs.At(ri)
			rs := r.Sym()