prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000000))
r0 = openat$sr(0xffffffffffffff9c, &(0x7f0000000440), 0x4840, 0x0)
preadv2(r0, 0x0, 0x0, 0x0, 0x0, 0x0)