}

	// New symbols should not initially be reachable.
	if ldr.AttrReachable(es1) || ldr.AttrReachable(es2) || ldr.AttrReachable(es3) {
		t.Errorf("newly materialized symbols should not be reachable")
	}

	// ... however it should be possible to set/unset their reachability.
	ldr.SetAttrReachable(es3, true)
	if !ldr.AttrReachable(es3) {
		t.Errorf("expected reachable symbol after update")
	}

}

func fieldtrack(arch *sys.Arch, l *loader.Loader) {
	var buf strings.Builder
	for i := loader.Sym(1); i < loader.Sym(l.NSym()); i++ {
		if name := l.SymName(i); strings.HasPrefix(name, "go:track.") {
			if l.AttrReachable(i) {
				l.SetAttrSpecial(i, true)
				l.SetAttrNotInSymbolTable(i, true)
				buf.WriteString(name[9:])
				for p := l.Reachparent[i]; p != 0; p = l.Reachparent[p] {
					buf.WriteString("\t")

					// its child types with UsedInIface set. (See also the
					// comment below.)
					rs := r.Sym()
					if !d.ldr.AttrUsedInIface(rs) {
						d.ldr.SetAttrUsedInIface(rs, true)
						if d.ldr.AttrReachable(rs) {
							d.ldr.SetAttrReachable(rs, false)
							d.mark(rs, symIdx)
						}
					}
				}
				i += 2
				continue
			case objabi.R_USETYPE:

		}
		if (sn == "" || sn[0] == '.') && !ldr.IsFileLocal(s) {
			return false
		}
		return true
	}

	// Data symbols.
	for s := loader.Sym(1); s < loader.Sym(ldr.NSym()); s++ {
		if !ldr.AttrReachable(s) {
			continue
		}
		st := ldr.SymType(s)
		if st >= sym.SELFRXSECT && st < sym.SXREF {
			typ := elf.STT_OBJECT
			if st == sym.STLSBSS {
				if ctxt.IsInternal() {
					continue
				}

		return
	}
	ldr := ctxt.loader

	for i, s := range syms {
		if !ldr.AttrReachable(s) {
			continue
		}
		if uint64(ldr.SymValue(s)) >= sect.Vaddr {
			syms = syms[i:]
			break
		}
	}

	eaddr := sect.Vaddr + sect.Length
	for _, s := range syms {
		if !ldr.AttrReachable(s) {
			continue
		}
		if ldr.SymValue(s) >= int64(eaddr) {
			break
		}

			return 0
		}
		sect.Reloff = uint64(ctxt.Out.Offset())
		for i, s := range syms {
			if !ldr.AttrReachable(s) {
				continue
			}
			if uint64(ldr.SymValue(s)) >= sect.Vaddr {
				syms = syms[i:]
				break
			}
		}
		eaddr := int64(sect.Vaddr + sect.Length)
		for _, s := range syms {
			if !ldr.AttrReachable(s) {
				continue
			}
			if ldr.SymValue(s) >= eaddr {
				break
			}

	if s := ldr.Lookup("runtime.duffcopy", sym.SymVerABIInternal); s != 0 && ldr.AttrReachable(s) {
		addLabelSyms(s, 8, 8*64)
	}
	if s := ldr.Lookup("runtime.duffzero", sym.SymVerABIInternal); s != 0 && ldr.AttrReachable(s) {
		addLabelSyms(s, 4, 4*64)
	}

	if ctxt.IsDarwin() {
		big := false
		for _, seg := range ld.Segments {

func (p *relocsByOff) Swap(i, j int) {
	p.relocs[i], p.relocs[j] = p.relocs[j], p.relocs[i]
}

func (sb *SymbolBuilder) Reachable() bool {
	return sb.l.AttrReachable(sb.symIdx)
}

func (sb *SymbolBuilder) SetReachable(v bool) {
	sb.l.SetAttrReachable(sb.symIdx, v)
}

func (sb *SymbolBuilder) ReadOnly() bool {
	return sb.l.AttrReadOnly(sb.symIdx)
}