tls_base:   unsafe.Pointer(&mp.tls[0]),
		tls_size:   unsafe.Sizeof(mp.tls),
	}

	var oset sigset
	sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
	ret := retryOnEAGAIN(func() int32 {
		errno := thr_new(&param, int32(unsafe.Sizeof(param)))
		// thr_new returns negative errno
		return -errno
	})
	sigprocmask(_SIG_SETMASK, &oset, nil)
	if ret != 0 {

	// Finally, create the thread. It starts at mstart_stub, which does some low-level
	// setup and then calls mstart.
	var oset sigset
	sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
	err = retryOnEAGAIN(func() int32 {
		return pthread_create(&attr, abi.FuncPCABI0(mstart_stub), unsafe.Pointer(mp))
	})
	sigprocmask(_SIG_SETMASK, &oset, nil)
	if err != 0 {
		writeErrStr(failthreadcreate)
		exit(1)
	}
}

	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 {

				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)

}

// On multi-thread program, sigprocmask must not be called.
// It's replaced by sigthreadmask.
func sigprocmask1(how, new, old uintptr)

//go:nosplit
func sigprocmask(how int32, new, old *sigset) {
	gp := getg()

	// Check the validity of m because it might be called during a cgo

//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

	SYS_KLDSYM                   = 337 // { int kldsym(int fileid, int cmd, \
	SYS_JAIL                     = 338 // { int jail(struct jail *jail); }
	SYS_SIGPROCMASK              = 340 // { int sigprocmask(int how, \
	SYS_SIGSUSPEND               = 341 // { int sigsuspend(const sigset_t *sigmask); }
	SYS_SIGPENDING               = 343 // { int sigpending(sigset_t *set); }

	SYS_KLDSYM                   = 337 // { int kldsym(int fileid, int cmd, \
	SYS_JAIL                     = 338 // { int jail(struct jail *jail); }
	SYS_SIGPROCMASK              = 340 // { int sigprocmask(int how, \
	SYS_SIGSUSPEND               = 341 // { int sigsuspend(const sigset_t *sigmask); }
	SYS_SIGPENDING               = 343 // { int sigpending(sigset_t *set); }

	SYS_KLDSYM                   = 337 // { int kldsym(int fileid, int cmd, \
	SYS_JAIL                     = 338 // { int jail(struct jail *jail); }
	SYS_SIGPROCMASK              = 340 // { int sigprocmask(int how, \
	SYS_SIGSUSPEND               = 341 // { int sigsuspend(const sigset_t *sigmask); }
	SYS_SIGPENDING               = 343 // { int sigpending(sigset_t *set); }