prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000040)) r0 = getpid() r1 = pidfd_open(r0, 0x0) copy_file_range(r1, 0x0, r1, 0x0, 0x0, 0x0)