}

// 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

	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

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

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

fallback:
	MOV	$8(X2), A1
	MOV	$SYS_clock_gettime, A7
	ECALL
	MOV	8(X2), T0	// sec
	MOV	16(X2), T1	// nsec
	MOV	$1000000000, T2
	MUL	T2, T0
	ADD	T1, T0
	MOV	T0, ret+0(FP)
	RET

// func rtsigprocmask(how int32, new, old *sigset, size int32)
TEXT runtime·rtsigprocmask(SB),NOSPLIT|NOFRAME,$0-28
	MOVW	how+0(FP), A0
	MOV	new+8(FP), A1
	MOV	old+16(FP), A2
	MOVW	size+24(FP), A3
	MOV	$SYS_rt_sigprocmask, A7