prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000040)) r0 = semget$private(0x0, 0x4, 0x0) semtimedop(r0, &(0x7f0000000340)=[{}], 0x1, 0x0)