futex_waitv

wait for FUTEX_WAKE operation on a vector of futexes

sys_futex_waitv(struct futex_waitv *waiters, unsigned int nr_futexes, unsigned int flags, struct __kernel_timespec *timeout, clockid_t clockid)

register	value
`g1`	449, the syscall number
`o0`	struct futex_waitv *waiters
`o1`	unsigned int nr_futexes
`o2`	unsigned int flags
`o3`	struct __kernel_timespec *timeout
`o4`	clockid_t clockid
`o0`	the return value

Then run t 0x6d to enter the kernel.

Same syscall on other architectures