name:   ".rdata$.refptr.__native_startup_lock",
			ok:     true,
			auxstr: "{Size:8 NumRelocs:1 NumLineNumbers:0 Checksum:0 SecNum:16 Selection:2 _:[0 0 0]}",
		},
		81: testpoint{
			name:   ".debug_line",
			ok:     true,
			auxstr: "{Size:994 NumRelocs:1 NumLineNumbers:0 Checksum:1624223678 SecNum:32 Selection:0 _:[0 0 0]}",
		},
		155: testpoint{
			name: ".file",
			ok:   false,
			err:  "incorrect symbol storage class",

	tl.SetType(sym.STYPELINK)
	ldr.SetAttrLocal(tl.Sym(), true)
	tl.SetSize(int64(4 * len(typelinks)))
	tl.Grow(tl.Size())
	relocs := tl.AddRelocs(len(typelinks))
	for i, s := range typelinks {
		r := relocs.At(i)
		r.SetSym(s.Type)
		r.SetOff(int32(i * 4))
		r.SetSiz(4)
		r.SetType(objabi.R_ADDROFF)
	}

	ptrsize := ctxt.Arch.PtrSize
	il := ldr.CreateSymForUpdate("runtime.itablink", 0)
	il.SetType(sym.SITABLINK)

	s.SetFlag(0x12)
	s.SetSiz(12345)
	s.SetAlign(8)
	s.Write(w)

	var r Reloc
	r.SetOff(12)
	r.SetSiz(4)
	r.SetType(uint16(objabi.R_ADDR))
	r.SetAdd(54321)
	r.SetSym(SymRef{11, 22})
	r.Write(w)

	var a Aux
	a.SetType(AuxFuncInfo)
	a.SetSym(SymRef{33, 44})
	a.Write(w)

	w.wr.Flush()

	// Read them back and check.
	b := buf.Bytes()
	var s2 Sym
	s2.fromBytes(b)

	o(0x1a000004)
	rel, _ := initfunc.AddRel(objabi.R_LOONG64_ADDR_HI)
	rel.SetOff(0)
	rel.SetSiz(4)
	rel.SetSym(ctxt.Moduledata)

	//	4:	02c00084	addi.d	$a0, $a0, 0
	//				4: R_LARCH_PCALA_LO12	local.moduledata
	o(0x02c00084)
	rel2, _ := initfunc.AddRel(objabi.R_LOONG64_ADDR_LO)
	rel2.SetOff(4)
	rel2.SetSiz(4)
	rel2.SetSym(ctxt.Moduledata)

	//	8:	50000000	b	0
	//				8: R_LARCH_B26	runtime.addmoduledata
	o(0x50000000)

			rels := ldr.Relocs(uw)
			for i := 0; i < rels.Count(); i++ {
				r := rels.At(i)
				rel, _ := xdata.AddRel(r.Type())
				rel.SetOff(int32(off) + r.Off())
				rel.SetSiz(r.Siz())
				rel.SetSym(r.Sym())
				rel.SetAdd(r.Add())
			}
		}

		// Reference:
		// https://learn.microsoft.com/en-us/cpp/build/exception-handling-x64#struct-runtime_function
		pdata.AddPEImageRelativeAddrPlus(ctxt.Arch, s, 0)

		xrel := rels.At(i + 2)
		handler := findHandlerInXDataAMD64(ldr, xrel.Sym(), xrel.Add())
		if handler != 0 {
			sb := ldr.MakeSymbolUpdater(rels.At(i).Sym())
			r, _ := sb.AddRel(objabi.R_KEEP)
			r.SetSym(handler)
		}
	}
	return nil
}

// findHandlerInXDataAMD64 finds the symbol in the .xdata section that
// corresponds to the exception handler.
// Reference:

	b.off += 4
}

func (b *sehbuf) writecode(op, value uint8) {
	b.write8(value<<4 | op)
}

// populateSeh generates the SEH unwind information for s.
func populateSeh(ctxt *obj.Link, s *obj.LSym) (sehsym *obj.LSym) {
	if s.NoFrame() {
		return
	}

	// This implementation expects the following function prologue layout:
	// - Stack split code (optional)
	// - PUSHQ	BP
	// - MOVQ	SP,	BP
	//

// for more on what's going on here.
type COFFSymbolAuxFormat5 struct {
	Size           uint32
	NumRelocs      uint16
	NumLineNumbers uint16
	Checksum       uint32
	SecNum         uint16
	Selection      uint8
	_              [3]uint8 // padding
}

// These constants make up the possible values for the 'Selection'
// field in an AuxFormat5.
const (

				rAdd = int64(rx.Symbol.Value)

			case xcoff.R_RBR:
				rSize = 4
				rType = objabi.R_CALLPOWER
				rAdd = 0
			}
			r, _ := sb.AddRel(rType)
			r.SetOff(rOff)
			r.SetSiz(rSize)
			r.SetSym(rSym)
			r.SetAdd(rAdd)
		}
	}
	return textp, nil
}

// Convert symbol xcoff type to sym.SymKind
// Returns nil if this shouldn't be added into loader (like .file or .dw symbols )