rt_sigtimedwait

synchronously wait for queued signals

sys_rt_sigtimedwait(const sigset_t *uthese, siginfo_t *uinfo, const struct __kernel_timespec *uts, size_t sigsetsize)

register	value
`g1`	105, the syscall number
`o0`	const sigset_t *uthese
`o1`	siginfo_t *uinfo
`o2`	const struct __kernel_timespec *uts
`o3`	size_t sigsetsize
`o0`	the return value

Then run t 0x6d to enter the kernel.

Same syscall on other architectures