> Can any of these stubs throw exceptions? What are they used for? I suspect they're simple thunks. I can ask what they do.
> My first reaction is to simply consider them invisible system frames > and ignore them when it comes to unwinding... That's what we're trying to do, but the CFA corresponds to the "normal" cfa but with a different (wrong) return address. The fallback handler corrects the RA and the next iteration sees the corrected frame. If the fallback handler borks the cfa by, for example, just subtracting 1 from it, will that confuse the unwinder? Or will it "just work".