Yes, the first one. One thing I liked about it though is that the vendor uses uniform ioctl calling convention for pretty much everything they implement in the

Yes, the first one. One thing I liked about it though is that the vendor uses uniform ioctl calling convention for pretty much everything they implement in the kernel, so I have modified strace to decode their ioctl payload, and I was able to rewrite most of their library code with my implementation, with the help of traces of their demo app. Now I can drop their complicated and buggy userspace code completely and use my own rootfs. The kernel is harder, since they also violate GPL and don't provide kernel source code along with their terminal, and neither does their SoC vendor.