sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
	var ret int32
	for tries := 0; tries < 20; tries++ {
		// pthread_create can fail with EAGAIN for no reasons
		// but it will be ok if it retries.
		ret = pthread_create(&tid, &attr, fn, nil)
		if ret != _EAGAIN {
			break
		}
		usleep(uint32(tries+1) * 1000) // Milliseconds.
	}
	sigprocmask(_SIG_SETMASK, &oset, nil)
	if ret != 0 {

	uc.uc_sigmask = sigset_all

	var oset sigset
	sigprocmask(_SIG_SETMASK, &sigset_all, &oset)

	lwp_mcontext_init(&uc.uc_mcontext, stk, mp, mp.g0, abi.FuncPCABI0(netbsdMstart))

	ret := retryOnEAGAIN(func() int32 {
		errno := lwp_create(unsafe.Pointer(&uc), _LWP_DETACHED, unsafe.Pointer(&mp.procid))
		// lwp_create returns negative errno
		return -errno
	})
	sigprocmask(_SIG_SETMASK, &oset, nil)
	if ret != 0 {

	// Disable signals during create, so that the new thread starts
	// with signals disabled. It will enable them in minit.
	sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
	ret = retryOnEAGAIN(func() int32 {
		return pthread_create(&tid, &attr, abi.FuncPCABI0(tstart_sysvicall), unsafe.Pointer(mp))
	})
	sigprocmask(_SIG_SETMASK, &oset, nil)
	if ret != 0 {

// the stack is safe to reclaim.
//
//go:noescape
func exitThread(wait *atomic.Uint32)

//go:noescape
func obsdsigprocmask(how int32, new sigset) sigset

//go:nosplit
//go:nowritebarrierrec
func sigprocmask(how int32, new, old *sigset) {
	n := sigset(0)
	if new != nil {
		n = *new
	}
	r := obsdsigprocmask(how, n)
	if old != nil {
		*old = r
	}
}

func pipe2(flags int32) (r, w int32, errno int32)

	KeepAlive(new)
	KeepAlive(old)
}
func sigaction_trampoline()

//go:nosplit
//go:cgo_unsafe_args
func sigprocmask(how uint32, new *sigset, old *sigset) {
	// sigprocmask is called from sigsave, which is called from needm.
	// As such, we have to be able to run with no g here.
	asmcgocall_no_g(unsafe.Pointer(abi.FuncPCABI0(sigprocmask_trampoline)), unsafe.Pointer(&how))

				sigdelset(&sigBlocked, i)
			}
		}
		sigprocmask(_SIG_SETMASK, &sigBlocked, nil)
		for {
			select {
			case sig := <-enableSigChan:
				if sig > 0 {
					sigdelset(&sigBlocked, int(sig))
				}
			case sig := <-disableSigChan:
				if sig > 0 && blockableSig(sig) {
					sigaddset(&sigBlocked, int(sig))
				}
			}
			sigprocmask(_SIG_SETMASK, &sigBlocked, nil)

//go:noescape
func timer_delete(timerid int32) int32

//go:noescape
func rtsigprocmask(how int32, new, old *sigset, size int32)

//go:nosplit
//go:nowritebarrierrec
func sigprocmask(how int32, new, old *sigset) {
	rtsigprocmask(how, new, old, int32(unsafe.Sizeof(*new)))
}

func raise(sig uint32)
func raiseproc(sig uint32)

//go:noescape

	libcCall(unsafe.Pointer(abi.FuncPCABI0(sigaction_trampoline)), unsafe.Pointer(&sig))
	KeepAlive(new)
	KeepAlive(old)
}
func sigaction_trampoline()

//go:nosplit
//go:cgo_unsafe_args
func sigprocmask(how uint32, new *sigset, old *sigset) {
	libcCall(unsafe.Pointer(abi.FuncPCABI0(sigprocmask_trampoline)), unsafe.Pointer(&how))
	KeepAlive(new)
	KeepAlive(old)
}
func sigprocmask_trampoline()

//go:nosplit

	}

	return prev, nil
}

//sysnb	rtSigprocmask(how int, set *Sigset_t, oldset *Sigset_t, sigsetsize uintptr) (err error) = SYS_RT_SIGPROCMASK

func PthreadSigmask(how int, set, oldset *Sigset_t) error {
	if oldset != nil {
		// Explicitly clear in case Sigset_t is larger than _C__NSIG.
		*oldset = Sigset_t{}
	}
	return rtSigprocmask(how, set, oldset, _C__NSIG/8)
}

	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func rtSigprocmask(how int, set *Sigset_t, oldset *Sigset_t, sigsetsize uintptr) (err error) {
	_, _, e1 := RawSyscall6(SYS_RT_SIGPROCMASK, uintptr(how), uintptr(unsafe.Pointer(set)), uintptr(unsafe.Pointer(oldset)), uintptr(sigsetsize), 0, 0)