//sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error)
//sysnb getentropy(p []byte) (err error)
//sys fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
-//sys fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) = SYS_fcntl
//sys unlinkat(fd int, path string, flags int) (err error)
//sys openat(fd int, path string, flags int, perm uint32) (fdret int, err error)