// Go special registers. We inject sigpanic0 (instead of sigpanic),
	// which takes care of that.
	if shouldPushSigpanic(gp, pc, *(*uintptr)(unsafe.Pointer(sp))) {
		c.pushCall(abi.FuncPCABI0(sigpanic0), pc)
	} else {
		// Not safe to push the call. Just clobber the frame.
		c.set_rip(uint64(abi.FuncPCABI0(sigpanic0)))
	}
}

func (c *sigctxt) pushCall(targetPC, resumePC uintptr) {

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include "textflag.h"

#ifndef GOARCH_amd64
TEXT ·sigpanic0(SB),NOSPLIT,$0-0
	JMP	·sigpanic<ABIInternal>(SB)
#endif

// See map.go comment on the need for this routine.
TEXT ·mapinitnoop<ABIInternal>(SB),NOSPLIT,$0-0

			flags = t.flags
			break
		}
	}
	if flags&_SigPanic != 0 && gp.throwsplit {
		// We can't safely sigpanic because it may grow the
		// stack. Abort in the signal handler instead.
		flags = (flags &^ _SigPanic) | _SigThrow
	}
	if flags&_SigGoExit != 0 {
		exits((*byte)(add(unsafe.Pointer(note), 9))) // Strip "go: exit " prefix.
	}
	if flags&_SigPanic != 0 {
		// Copy the error string from sigtramp's stack into m->notesig so

	// won't get to see who faulted.)
	// Also don't push a sigpanic frame if the faulting PC
	// is the entry of asyncPreempt. In this case, we suspended
	// the thread right between the fault and the exception handler
	// starting to run, and we have pushed an asyncPreempt call.
	// The exception is not from asyncPreempt, so not to push a
	// sigpanic call to make it look like that. Instead, just

func addmoduledata()

// Injected by the signal handler for panicking signals.
// Initializes any registers that have fixed meaning at calls but
// are scratch in bodies and calls sigpanic.
// On many platforms it just jumps to sigpanic.
func sigpanic0()

// intArgRegs is used by the various register assignment
// algorithm implementations in the runtime. These include:.
// - Finalizers (mfinal.go)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

// This program will crash.
// We want to test unwinding from sigpanic into C code (without a C symbolizer).

/*
#cgo CFLAGS: -O0

char *pnil;

static int f1(void) {
	*pnil = 0;
	return 0;
}
*/
import "C"

func init() {

	if shouldPushSigpanic(gp, pc, uintptr(c.link())) {
		// Make it look the like faulting PC called sigpanic.
		c.set_link(uint64(pc))
	}

	// In case we are panicking from external C code
	sigpanicPC := uint64(abi.FuncPCABIInternal(sigpanic))
	c.set_r28(sigpanicPC >> 32 << 32) // RSB register
	c.set_r30(uint64(uintptr(unsafe.Pointer(gp))))
	c.set_pc(sigpanicPC)
}

func (c *sigctxt) pushCall(targetPC, resumePC uintptr) {

	{_SigPanic, "sys: trap: fault read"},  // SIGRFAULT
	{_SigPanic, "sys: trap: fault write"}, // SIGWFAULT

	// We can also recover from math errors.
	{_SigPanic, "sys: trap: divide error"}, // SIGINTDIV
	{_SigPanic, "sys: fp:"},                // SIGFLOAT

	// All other traps are normally handled as if they were marked SigThrow.
	// We mark them SigPanic here so that debug.SetPanicOnFault will work.

	RET

// Initialize special registers then jump to sigpanic.
// This function is injected from the signal handler for panicking
// signals. It is quite painful to set X15 in the signal context,
// so we do it here.
TEXT ·sigpanic0(SB),NOSPLIT,$0-0
	get_tls(R14)
	MOVQ	g(R14), R14
#ifndef GOOS_plan9
	XORPS	X15, X15
#endif
	JMP	·sigpanic<ABIInternal>(SB)

// instead.
//
// This must NOT be nosplit because the linker doesn't know where
// sigpanic calls can be injected.
//
// The signal handler must not inject a call to sigpanic if
// getg().throwsplit, since sigpanic may need to grow the stack.
//
// This is exported via linkname to assembly in runtime/cgo.
//
//go:linkname sigpanic
func sigpanic() {
	gp := getg()
	if !canpanic() {