if runtime.GOARCH != "amd64" {
		t.Skip("skipping amd64-only test")
	}
	want := []string{"runtime_test.sehCallers", "runtime_test.TestSehUnwindNilPointerPanic.func1", "runtime.gopanic",
		"runtime.sigpanic", "runtime_test.TestSehUnwindNilPointerPanic"}
	defer func() {
		if r := recover(); r == nil {
			t.Fatal("did not panic")
		}
		pcs := sehCallers()
		testSehCallersEqual(t, pcs, want)
	}()
	var p *int

	{"runtime.asanregisterglobals", 1},
	{"runtime.deferproc", 1},
	{"runtime.deferprocStack", 1},
	{"runtime.deferreturn", 1},
	{"runtime.newproc", 1},
	{"runtime.panicoverflow", 1},
	{"runtime.sigpanic", 1},
	{"runtime.gcWriteBarrier", 1},
	{"runtime.duffzero", 1},
	{"runtime.duffcopy", 1},
	{"runtime.morestack", 0},
	{"runtime.morestackc", 0},
	{"runtime.morestack_noctxt", 0},
	{"type:int8", 0},

// in the context that starts executing at sigresume.
TEXT runtime·sigresume(SB),NOSPLIT|NOFRAME,$0
	// Important: do not smash LR,
	// which is set to a live value when handling
	// a signal by pushing a call to sigpanic onto the stack.
	MOVD	R0, RSP
	B	(R1)

TEXT runtime·exceptiontramp(SB),NOSPLIT|NOFRAME,$0
	MOVD	$const_callbackVEH, R1
	B	sigtramp<>(SB)

TEXT runtime·firstcontinuetramp(SB),NOSPLIT|NOFRAME,$0

// in the context that starts executing at sigresume.
TEXT runtime·sigresume(SB),NOSPLIT|NOFRAME,$0
	// Important: do not smash LR,
	// which is set to a live value when handling
	// a signal by pushing a call to sigpanic onto the stack.
	MOVW	R0, R13
	B	(R1)

TEXT runtime·exceptiontramp(SB),NOSPLIT|NOFRAME,$0
	MOVW	$const_callbackVEH, R1
	B	sigtramp<>(SB)

TEXT runtime·firstcontinuetramp(SB),NOSPLIT|NOFRAME,$0

func nsec(*int64) int64

//go:noescape
func sigtramp(ureg, note unsafe.Pointer)

func setfpmasks()

//go:noescape
func tstart_plan9(newm *m)

func errstr() string

type _Plink uintptr

func sigpanic() {
	gp := getg()
	if !canpanic() {
		throw("unexpected signal during runtime execution")
	}

	note := gostringnocopy((*byte)(unsafe.Pointer(gp.m.notesig)))
	switch gp.sig {
	case _SIGRFAULT, _SIGWFAULT:

		// Check a simple case of inlining
		r := ttiSimple1()
		check(t, r, "runtime_test.ttiSimple3(...)", "runtime_test.ttiSimple2(...)", "runtime_test.ttiSimple1()")
	})

	t.Run("sigpanic", func(t *testing.T) {
		// Check that sigpanic from an inlined function prints correctly
		r := ttiSigpanic1()

	case ssa.OpWasmLoweredNilCheck:
		getValue64(s, v.Args[0])
		s.Prog(wasm.AI64Eqz)
		s.Prog(wasm.AIf)
		p := s.Prog(wasm.ACALLNORESUME)
		p.To = obj.Addr{Type: obj.TYPE_MEM, Name: obj.NAME_EXTERN, Sym: ir.Syms.SigPanic}
		s.Prog(wasm.AEnd)
		if logopt.Enabled() {
			logopt.LogOpt(v.Pos, "nilcheck", "genssa", v.Block.Func.Name)
		}
		if base.Debug.Nil != 0 && v.Pos.Line() > 1 { // v.Pos.Line()==1 in generated wrappers

func printDebugLogPC(pc uintptr, returnPC bool) {
	fn := findfunc(pc)
	if returnPC && (!fn.valid() || pc > fn.entry()) {
		// TODO(austin): Don't back up if the previous frame
		// was a sigpanic.
		pc--
	}

	print(hex(pc))
	if !fn.valid() {
		print(" [unknown PC]")
	} else {
		name := funcname(fn)
		file, line := funcline(fn, pc)
		print(" [", name, "+", hex(pc-fn.entry()),

		frame.varp -= goarch.PtrSize
	}

	frame.argp = frame.fp + sys.MinFrameSize

	// Determine frame's 'continuation PC', where it can continue.
	// Normally this is the return address on the stack, but if sigpanic
	// is immediately below this function on the stack, then the frame
	// stopped executing due to a trap, and frame.pc is probably not
	// a safe point for looking up liveness information. In this panicking case,

	_SigKill                 // if signal.Notify doesn't take it, exit quietly
	_SigThrow                // if signal.Notify doesn't take it, exit loudly
	_SigPanic                // if the signal is from the kernel, panic
	_SigDefault              // if the signal isn't explicitly requested, don't monitor it
	_SigGoExit               // cause all runtime procs to exit (only used on Plan 9).