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
`d0`	449, the syscall number
`d1`	struct futex_waitv *waiters
`d2`	unsigned int nr_futexes
`d3`	unsigned int flags
`d4`	struct __kernel_timespec *timeout
`d5`	clockid_t clockid
`d0`	the return value

Then run trap #0 to enter the kernel.

Same syscall on other architectures