// symbol.
func (ctxt *Link) createGeneratorSymbol(name string, version int, t sym.SymKind, size int64, gen generatorFunc) loader.Sym {
	ldr := ctxt.loader
	s := ldr.LookupOrCreateSym(name, version)
	ldr.SetIsGeneratedSym(s, true)
	sb := ldr.MakeSymbolUpdater(s)
	sb.SetType(t)
	sb.SetSize(size)
	ctxt.generatorSyms[s] = gen
	return s