r0 = epoll_create(0x8000)
r1 = socket$inet_udp(0x2, 0x2, 0x0)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f0000000000))
epoll_ctl$EPOLL_CTL_MOD(r0, 0x4, r1, &(0x7f00000000c0))