__bits [4]uint32
}

type siginfo struct {
	_signo  int32
	_code   int32
	_errno  int32
	_reason [20]byte
}

type stackt struct {
	ss_sp    uintptr
	ss_size  uintptr
	ss_flags int32
}

type timespec struct {
	tv_sec  int64
	tv_nsec int32
}

//go:nosplit
func (ts *timespec) setNsec(ns int64) {
	ts.tv_sec = int64(timediv(ns, 1e9, &ts.tv_nsec))
}

}

type siginfo struct {
	_signo  int32
	_code   int32
	_errno  int32
	_pad    int32
	_reason [24]byte
}

type stackt struct {
	ss_sp     uintptr
	ss_size   uintptr
	ss_flags  int32
	pad_cgo_0 [4]byte
}

type timespec struct {
	tv_sec  int64
	tv_nsec int64
}

//go:nosplit
func (ts *timespec) setNsec(ns int64) {
	ts.tv_sec = ns / 1e9
	ts.tv_nsec = ns % 1e9

}

type siginfo struct {
	si_signo  int32
	si_code   int32
	si_errno  int32
	pad_cgo_0 [4]byte
	_data     [120]byte
}

type stackt struct {
	ss_sp    uintptr
	ss_size  uintptr
	ss_flags int32
}

type timespec struct {
	tv_sec    int64
	tv_nsec   int32
	pad_cgo_0 [4]byte
}

//go:nosplit
func (ts *timespec) setNsec(ns int64) {

	rtp        *rtprio
	spare      [3]uintptr
}

type thread int32 // long

type sigset struct {
	__bits [4]uint32
}

type stackt struct {
	ss_sp    uintptr
	ss_size  uintptr
	ss_flags int32
}

type siginfo struct {
	si_signo  int32
	si_errno  int32
	si_code   int32
	si_pid    int32
	si_uid    uint32
	si_status int32
	si_addr   uintptr
	si_value  [4]byte

	rtp        *rtprio
	spare      [3]uintptr
}

type thread int64 // long

type sigset struct {
	__bits [4]uint32
}

type stackt struct {
	ss_sp     uintptr
	ss_size   uintptr
	ss_flags  int32
	pad_cgo_0 [4]byte
}

type siginfo struct {
	si_signo  int32
	si_errno  int32
	si_code   int32
	si_pid    int32
	si_uid    uint32
	si_status int32
	si_addr   uint64

	significand [4]uint16
	exponent    uint16
}

type stackt struct {
	ss_sp     *byte
	ss_flags  int32
	pad_cgo_0 [4]byte
	ss_size   uintptr
}

type mcontext struct {
	gregs       [23]uint64
	fpregs      *fpstate
	__reserved1 [8]uint64
}

type ucontext struct {
	uc_flags     uint64
	uc_link      *ucontext
	uc_stack     stackt
	uc_mcontext  mcontext
	uc_sigmask   usigset

func mdestroy(mp *m) {
}

func sigtramp()

type sigactiont struct {
	sa_sigaction uintptr
	sa_mask      sigset
	sa_flags     int32
}

//go:nosplit
//go:nowritebarrierrec
func setsig(i uint32, fn uintptr) {
	var sa sigactiont
	sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK | _SA_RESTART
	sa.sa_mask = sigset_all

	sp := uintptr(unsafe.Pointer(&sig))
	if sp >= mp.gsignal.stack.lo && sp < mp.gsignal.stack.hi {
		return false
	}

	var st stackt
	sigaltstack(nil, &st)
	stsp := uintptr(unsafe.Pointer(st.ss_sp))
	if st.ss_flags&_SS_DISABLE == 0 && sp >= stsp && sp < stsp+st.ss_size {
		setGsignalStack(&st, gsigStack)
		return true
	}

	if sp >= mp.g0.stack.lo && sp < mp.g0.stack.hi {
		// The signal was delivered on the g0 stack.

func sigtramp()

type sigactiont struct {
	sa_handler uintptr
	sa_flags   int32
	sa_mask    sigset
}

// See os_freebsd2.go, os_freebsd_amd64.go for setsig function

//go:nosplit
//go:nowritebarrierrec
func setsigstack(i uint32) {
	var sa sigactiont
	sigaction(i, nil, &sa)
	if sa.sa_flags&_SA_ONSTACK != 0 {
		return
	}
	sa.sa_flags |= _SA_ONSTACK
	sigaction(i, &sa, nil)
}

//go:nosplit

	KeepAlive(new)
	KeepAlive(old)
}
func sigprocmask_trampoline()

//go:nosplit
//go:cgo_unsafe_args
func sigaltstack(new *stackt, old *stackt) {
	if new != nil && new.ss_flags&_SS_DISABLE != 0 && new.ss_size == 0 {
		// Despite the fact that Darwin's sigaltstack man page says it ignores the size
		// when SS_DISABLE is set, it doesn't. sigaltstack returns ENOMEM