Re: PowerPC 405 support

[Daniel Jacobowitz <drow@false.org>]

On Fri, Jun 23, 2006 at 07:26:22PM -0700, Michael Eager wrote:
> I was looking at adding support to GDB for a variant of
> the PPC 405.  This variant has several added instructions
> but is otherwise the same, i.e., has the same registers, etc.
> 
> I thought I'd add a processor type named Xppc405 or ppc405X
> for this variant.  Then I noticed that the 405 is really
> not supported as a variant, but the 403 is, and that the 403
> has extensions (and at least one hack) for the 405.  There
> are opcodes defined for PPC405, but this symbol is aliased
> to PPC403.
> 
> It looks pretty straight-forward to create a ppc405 variant
> and unalias it from the ppc403.  Then create a ppc405X
> variant which builds on the ppc405.  Any reason not to do
> this?

I'm going to guess here, but probably this would be a better suited
question for binutils@.  GDB doesn't really have much knowledge about
PPC variants, just the bits it inherits from libopcodes.

-- 
Daniel Jacobowitz
CodeSourcery