[RFC] Register sets

[Andrew Cagney]

>  > I should note that I do know of a second way of handling cross 
>    > architectures (x86-64 on i386 et.al.).  Add a table of cross 
>    > architecture unwinders and then allow different frames to have different 
>    > architectures vis:
>    > 
>    > 	x86-64 frame
>    > 	<x86-64 X i386>
>    > 	i386 frame
>    > 	i386 frame
>    > 	<ia64 X i386>
>    > 	ia64 frame
>    > 
>    > but that's getting way ahead of many other changes.
> 
> A cross unwinder here would be a method that converts say an amd64
> register cache into an i386 register cache (among other things)?

Yes, but it would do the conversion at the frame level.

Andrew