r0 = openat$rtc(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
preadv(r0, &(0x7f0000000440)=[{0x0}, {&(0x7f00000002c0)=""/252, 0xfc}], 0x2, 0x0, 0x0)