[PATCH/RFC] Per-architecture DWARF CFI register state initialization hooks

[Andrew Cagney]

> Here's my proposal for the per-architecture DWARF CFI register state
> initialization hooks needed for S/390, and others.  This is a RFC,
> since I'm not entirely confident whether my approach is acceptable.  I
> chose to implement this using per-architecture data instead of adding
> a function to the architecture vector.  I think it is cleaner since it
> keeps things localized and modular, and the architecture vector is big
> enough as it stands.

Yes.  Technical nit though - I think it is still better to have a local 
data struct and store the value in there.

Andrew