prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000000))
rt_sigaction(0x5, &(0x7f0000000080)={0x0, 0x0, 0x0}, 0x0, 0x8, &(0x7f0000000200))