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This one is kind-of functional prerequisity for #1317, as FDCAN has two clocks and FDCAN_clk can only be configured using RCC clock select. Thus FDCAN is defunct unless one configured...

Internally, I have rewritten large portion of this patch in parallel with karlp's comments but did not manage to push / sync with comments here.

In following days/weeks I have to unpack relevant HW so I will be able to test the code again. I'd also like to get this PR off my table sooner...

Yes, it is possible to support this and it was on roadmap for quite some time. The only caveat, specific to CMRX ecosystem is floating-point handling during RPC calls.

As of now, this is just a draft. And this version of code probably doesn't even work. At least it doesn't crash the system immediately :) Right now there is...

This implementation would be OK if we didn't have RPC. Fortunately we have it and that makes things a little bit more complicated. We will have to be more involved...

Just to summarize and clarify: Using the provided linker script, the genlink-cmsis.py will correctly process the `--create` option and generate modified linker script, but will fail to update linker script...

Current linker script parser is kind-of experimental and is whitespace-aware. The reason for this is that the comparison of original and altered linker scripts is easy with whitespace retained. This...