> Even consider making everything a pseudo so that you know exactly what 
> you have at any stage.
> 

Hmm, I think this is effectively what I have. See the code below (which is 
very much a work-in-progress..., so don't even expect it to compile ;-)

> > I can make my arm_register_read function correctly remap the register 
> > numbers, but then I run into the problem that REGISTER_RAW_SIZE is used 
> > both above and below the regcache.
> 
> I don't understand why this is a problem.  I think a register (pseudo or 
> raw) should have only one size (c.f. my register_size() patch).

 However, in this situation, 
pseudo_rengo("r0") != regcache_regno("r0"), yet we effectively have

REGSITER_RAW_SIZE (pseudo_regno ("r0")) 
and
REGISTER_RAW_SIZE (regcache_regno ("r0"))


R.