MOVQ	DX, (g_sched+gobuf_ctxt)(DI)

	MOVQ	m_g0(BX), SI  // SI = m.g0
	CMPQ	DI, SI
	JNE	3(PC)
	CALL	runtime·badmorestackg0(SB)
	CALL	runtime·abort(SB)

	// Cannot grow signal stack (m->gsignal).
	MOVQ	m_gsignal(BX), SI
	CMPQ	DI, SI
	JNE	3(PC)
	CALL	runtime·badmorestackgsignal(SB)
	CALL	runtime·abort(SB)

	// Called from f.
	// Set m->morebuf to f's caller.

	gp := getg()
	if old != nil {
		old.stack = gp.m.gsignal.stack
		old.stackguard0 = gp.m.gsignal.stackguard0
		old.stackguard1 = gp.m.gsignal.stackguard1
		old.stktopsp = gp.m.gsignal.stktopsp
	}
	stsp := uintptr(unsafe.Pointer(st.ss_sp))
	gp.m.gsignal.stack.lo = stsp
	gp.m.gsignal.stack.hi = stsp + st.ss_size
	gp.m.gsignal.stackguard0 = stsp + stackGuard
	gp.m.gsignal.stackguard1 = stsp + stackGuard
}

//
// Ensure mayMoreStackPreempt can be called for all ABIs.
//
//go:nosplit
//go:linkname mayMoreStackPreempt
func mayMoreStackPreempt() {
	// Don't do anything on the g0 or gsignal stack.
	gp := getg()
	if gp == gp.m.g0 || gp == gp.m.gsignal {
		return
	}
	// Force a preemption, unless the stack is already poisoned.
	if gp.stackguard0 < stackPoisonMin {
		gp.stackguard0 = stackPreempt
	}
}

	// exchange!)
	var l *dlogger
	if getg() != mp.gsignal {
		l = mp.dlogCache
		mp.dlogCache = nil
	}
	releasem(mp)
	return l
}

// putCachedDlogger attempts to return l to the local cache. It
// returns false if this fails.
func putCachedDlogger(l *dlogger) bool {
	mp := acquirem()
	if getg() != mp.gsignal && mp.dlogCache == nil {
		mp.dlogCache = l
		releasem(mp)
		return true
	}

	grep -v 'SIGSTKSIZE\|SIGSTKSZ\|SIGRT' |
	sort >_signal.grep

echo '// mkerrors.sh' "$@"
echo '// Code generated by the command above; DO NOT EDIT.'
echo
go tool cgo -godefs -- "$@" _const.go >_error.out
cat _error.out | grep -vf _error.grep | grep -vf _signal.grep
echo
echo '// Errors'
echo 'const ('

func mpreinit(mp *m) {
	mp.gsignal = malg(32 * 1024) // OS X wants >= 8K
	mp.gsignal.m = mp
	if GOOS == "darwin" && GOARCH == "arm64" {
		// mlock the signal stack to work around a kernel bug where it may
		// SIGILL when the signal stack is not faulted in while a signal
		// arrives. See issue 42774.
		mlock(unsafe.Pointer(mp.gsignal.stack.hi-physPageSize), physPageSize)
	}
}

}

type sigset struct{}

// Called to initialize a new m (including the bootstrap m).
// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
func mpreinit(mp *m) {
	mp.gsignal = malg(32 * 1024)
	mp.gsignal.m = mp
}

//go:nosplit
func usleep_no_g(usec uint32) {
	usleep(usec)
}

//go:nosplit
func sigsave(p *sigset) {
}

//go:nosplit
func msigrestore(sigmask sigset) {
}

	"internal/goarch"
	"internal/stringslite"
	"unsafe"
)

// May run during STW, so write barriers are not allowed.
//
//go:nowritebarrierrec
func sighandler(_ureg *ureg, note *byte, gp *g) int {
	gsignal := getg()
	mp := gsignal.m

	var t sigTabT
	var docrash bool
	var sig int
	var flags int
	var level int32

	c := &sigctxt{_ureg}
	notestr := gostringnocopy(note)

	grep -v 'SIGSTKSIZE\|SIGSTKSZ\|SIGRT' |
	sort >_signal.grep

echo '// mkerrors.sh' "$@"
echo '// Code generated by the command above; DO NOT EDIT.'
echo
go tool cgo -godefs -- "$@" _const.go >_error.out
cat _error.out | grep -vf _error.grep | grep -vf _signal.grep
echo
echo '// Errors'
echo 'const ('

func mpreinit(mp *m) {
	gsignalSize := int32(32 * 1024)
	if GOARCH == "mips64" {
		gsignalSize = int32(64 * 1024)
	}
	mp.gsignal = malg(gsignalSize)
	mp.gsignal.m = mp
}

// Called to initialize a new m (including the bootstrap m).
// Called on the new thread, can not allocate memory.
func minit() {
	getg().m.procid = uint64(getthrid())