semtimedop_time64

System V semaphore operations

sys_semtimedop(int semid, struct sembuf *sops, unsigned nsops, const struct __kernel_timespec *timeout)

register	value
`r20`	420, the syscall number
`r26`	int semid
`r25`	struct sembuf *sops
`r24`	unsigned nsops
`r23`	const struct __kernel_timespec *timeout
`r28`	the return value

Then run ble 0x100(%sr2, %r0) to enter the kernel.

Same syscall on other architectures