Not using this, but tangentially related is (full disclosure, i am a maintainer of this project) live-bootstrap, which uses about a KB of binary to do a full "Linux from scratch" style thing - read https://github.com/fosslinux/live-bootstrap/blob/master/part... for all 143 steps you have to go through to get there.

Wow, just reading through the list of steps was fascinating!

I do plan to integrate this, or something very similar, into live-bootstrap. This is essentially the type of thing we would do to compile the Linux kernel within the bootstrap, which has not been done yet. However tccboot/derivative needs to be compiled from source within live-bootstrap which is not simple.

The kernel is still an unsolved problem, unfortunately. We need an appropriate, small seed kernel to be able to successfully run everything up until we can recompile linux (which also has proved difficult and is not why it is in the repo yet) :(

Furthermore, M2-Planet can be built by another C compiler written in assembly, all the way down to hex instructions.

https://github.com/oriansj/mescc-tools-seed/

These projects are from the Bootstrappable Builds folks:

https://bootstrappable.org/ https://bootstrapping.miraheze.org/wiki/