[RFA/RFC] fix problems with unwinder on mips-irix

[Joel Brobecker]

Andrew,

> If you've the time, please do.
> 
> Two key things to know:
> 
> - with three unwinders handling three different cases previously handled 
> by one, there's a lot of dead code paths.  For instance, 
> mips32_heuristic_proc_desc is now only called by mips_insn32_frame_cache 
> and hence can be inlined there, making it possible for your problem to 
> be solved more locally.
> 
> - I'm interested in a brutal overhaul of an unwinder, not a small tweak :-)

I think I can find the time for "a small tweak" within the next couple
of weeks, maybe this week-end. But if a "brutal overhaul" is required,
then the bar is too high for me. I just don't have the time.

If I may, I have the feeling sometimes that you expect the other
contributors to have the same level of involvment than you do. You
are extremely dedicated to the GDB project. That makes it very tough
at least for me to match even 10% of what you dedicate to GDB...

-- 
Joel