Certainly!

It should be relatively straightforward to make a library with a replacement for _Unwind_Backtrace. Basically, you'd just take the code from preload/src/unwind.rs, modify it a little, wrap it in a C API, put it inside of a cdylib crate (it'd probably be the best to put it in the not-perf repo), and you'd have an .so which is callable from any language.

I have zero rust experience, but if you have a C API I can play with, I'd like to test it out.

I suggest you don't shadow existing API though, better use different names. If anyone wants to replace _Unwind_Backtrace they should do that themselves.