recvmmsg

receive multiple messages on a socket

sys_recvmmsg(int fd, struct mmsghdr *mmsg, unsigned int vlen, unsigned int flags, struct __kernel_timespec *timeout)

register	value
`g1`	328, the syscall number
`o0`	int fd
`o1`	struct mmsghdr *mmsg
`o2`	unsigned int vlen
`o3`	unsigned int flags
`o4`	struct __kernel_timespec *timeout
`o0`	the return value

Then run t 0x6d to enter the kernel.

Same syscall on other architectures