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Originally Posted by scotty1024
Their code for flashing the kernel and user filesystem is all out in the public there in /old-root/linuxrc.
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Indeed it is, but can you find where the kernel ends up once it has been flashed? It's not on any of the accessible partitions.
Poking around inside /bin/firmupdate makes it look like it searches through /dev/tffsa for a hidden partition, then puts the kernel there. If we can find that, then we may also find any pre-kernel loading code that also runs.