[hppa] FYI: confusion in unwind descriptor field meaning

[Joel Brobecker]

> If you're going to do this, I recommend using the prologue analysis
> framework Jim posted, which hopefully we'll have merged by then.  If we
> haven't, well, an active user of it will make it easier.

There was some discussion about redesigning it a bit at the time.
I think it was something to make the analyser use callbacks in
the tdep code, as opposed to us calling the appropriate routines
in the analyzer. Is this still in the air (or maybe I am just
confused)? 

-- 
Joel