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)
}

		return
	}

	ldr := ctxt.loader
	for i, s := range syms {
		if !ldr.AttrReachable(s) {
			panic("should never happen")
		}
		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
		}

		die = d.newdie(&dwtypes, dwarf.DW_ABRV_TYPEDECL, name)
		d.newrefattr(die, dwarf.DW_AT_type, d.mustFind("<unspecified>"))
	}

	newattr(die, dwarf.DW_AT_go_kind, dwarf.DW_CLS_CONSTANT, int64(kind), 0)

	if d.ldr.AttrReachable(gotype) {
		newattr(die, dwarf.DW_AT_go_runtime_type, dwarf.DW_CLS_GO_TYPEREF, 0, dwSym(gotype))
	}

	// Sanity check.
	if _, ok := d.rtmap[gotype]; ok {

	// them to a go version of these functions in runtime/asm_ppc64x.s
	ts := ldr.LookupOrCreateSym("runtime.elf_"+s[1], 0)
	r.SetSym(ts)
	r.SetAdd(int64((n - minReg) * offMul))
	firstUse = !ldr.AttrReachable(ts)
	if firstUse {
		// This function only becomes reachable now. It has been dropped from
		// the text section (it was unreachable until now), it needs included.
		ldr.SetAttrReachable(ts, true)
	}

		// runtime.MemProfile is not retained in the binary after
		// deadcode (and we're not dynamically linking).
		memProfile := ctxt.loader.Lookup("runtime.MemProfile", abiInternalVer)
		if memProfile != 0 && !ctxt.loader.AttrReachable(memProfile) && !ctxt.DynlinkingGo() {
			memProfSym := ctxt.loader.LookupOrCreateSym("runtime.disableMemoryProfiling", 0)
			sb := ctxt.loader.MakeSymbolUpdater(memProfSym)
			sb.SetType(sym.SDATA)
			sb.SetSize(0)