// and following calls.
	maxLocalHeight := 0
	relocs, ri := ldr.Relocs(sym), 0
	pcsp := obj.NewPCIter(uint32(ctxt.Arch.MinLC))
	for pcsp.Init(ldr.Data(ldr.Pcsp(sym))); !pcsp.Done; pcsp.Next() {
		// pcsp.value is in effect for [pcsp.pc, pcsp.nextpc).
		height := int(pcsp.Value)
		if height > maxLocalHeight {
			maxLocalHeight = height
		}

		// Process calls in this span.

		}
		if fn.dwarfDebugLinesSym != nil && fn.dwarfDebugLinesSym.Size != 0 {
			w.aux1(goobj.AuxDwarfLines, fn.dwarfDebugLinesSym)
		}
		if fn.Pcln.Pcsp != nil && fn.Pcln.Pcsp.Size != 0 {
			w.aux1(goobj.AuxPcsp, fn.Pcln.Pcsp)
		}
		if fn.Pcln.Pcfile != nil && fn.Pcln.Pcfile.Size != 0 {
			w.aux1(goobj.AuxPcfile, fn.Pcln.Pcfile)
		}
		if fn.Pcln.Pcline != nil && fn.Pcln.Pcline.Size != 0 {

			}
			size += datSize
			seen[pcSym] = struct{}{}
		}
	}
	var pcsp, pcline, pcfile, pcinline loader.Sym
	var pcdata []loader.Sym
	for _, s := range funcs {
		fi := ldr.FuncInfo(s)
		if !fi.Valid() {
			continue
		}
		fi.Preload()
		pcsp, pcfile, pcline, pcinline, pcdata = ldr.PcdataAuxs(s, pcdata)

		pcSyms := []loader.Sym{pcsp, pcfile, pcline}
		for _, pcSym := range pcSyms {
			saveOffset(pcSym)
		}

	// FuncFlagSPWrite indicates a function that writes an arbitrary value to SP
	// (any write other than adding or subtracting a constant amount).
	// The traceback routines cannot encode such changes into the
	// pcsp tables, so the function traceback cannot safely unwind past
	// SPWrite functions. Stopping at an SPWrite function is considered
	// to be an incomplete unwinding of the stack. In certain contexts

		}

		for pcsp.Init(d.linkctxt.loader.Data(fpcsp)); !pcsp.Done; pcsp.Next() {
			nextpc := pcsp.NextPC

			// pciterinit goes up to the end of the function,
			// but DWARF expects us to stop just before the end.
			if int64(nextpc) == int64(len(d.ldr.Data(fn))) {
				nextpc--
				if nextpc < pcsp.PC {
					continue
				}
			}

	return funcline1(f, targetpc, true)
}

func funcspdelta(f funcInfo, targetpc uintptr) int32 {
	x, _ := pcvalue(f, f.pcsp, targetpc, true)
	if debugPcln && x&(goarch.PtrSize-1) != 0 {
		print("invalid spdelta ", funcname(f), " ", hex(f.entry()), " ", hex(targetpc), " ", hex(f.pcsp), " ", x, "\n")
		throw("bad spdelta")
	}
	return x
}

// funcMaxSPDelta returns the maximum spdelta at any point in f.

		if p.As == AFUNCDATA && p.From.Offset >= int64(nfuncdata) {
			nfuncdata = int(p.From.Offset + 1)
		}
	}

	pcln.Pcdata = make([]*LSym, npcdata)
	pcln.Funcdata = make([]*LSym, nfuncdata)

	pcln.Pcsp = funcpctab(ctxt, cursym, "pctospadj", pctospadj, nil)
	pcln.Pcfile = funcpctab(ctxt, cursym, "pctofile", pctofileline, pcln)
	pcln.Pcline = funcpctab(ctxt, cursym, "pctoline", pctofileline, nil)

				} else if v := s.VarInfo(); v != nil {
					fnNoNil(v.dwarfInfoSym)
				}
			}
			if flag&traversePcdata != 0 && s.Type == objabi.STEXT {
				fi := s.Func().Pcln
				fnNoNil(fi.Pcsp)
				fnNoNil(fi.Pcfile)
				fnNoNil(fi.Pcline)
				fnNoNil(fi.Pcinline)
				for _, d := range fi.Pcdata {
					fnNoNil(d)
				}
			}
		}
	}
}

		if a.Type() == t {
			return l.resolve(r, a.Sym())
		}
	}
	return 0
}

func (l *Loader) Pcsp(i Sym) Sym { return l.aux1(i, goobj.AuxPcsp) }

// Returns all aux symbols of per-PC data for symbol i.
// tmp is a scratch space for the pcdata slice.
func (l *Loader) PcdataAuxs(i Sym, tmp []Sym) (pcsp, pcfile, pcline, pcinline Sym, pcdata []Sym) {
	pcdata = tmp[:0]
	r, auxs := l.auxs(i)
	for j := range auxs {

}

// The compiler needs *LSym to be assignable to cmd/compile/internal/ssa.Sym.
func (*LSym) CanBeAnSSASym() {}
func (*LSym) CanBeAnSSAAux() {}

type Pcln struct {
	// Aux symbols for pcln
	Pcsp      *LSym
	Pcfile    *LSym
	Pcline    *LSym
	Pcinline  *LSym
	Pcdata    []*LSym
	Funcdata  []*LSym
	UsedFiles map[goobj.CUFileIndex]struct{} // file indices used while generating pcfile