PowerPC 603 Register Set Clarification

[Daniel Jacobowitz]

On Thu, Oct 27, 2005 at 11:30:13AM -0700, Ron McCall wrote:
> 
> 
> --- Daniel Jacobowitz <drow@false.org> wrote:
> > The best way to answer this question is to configure
> > GDB appropriately
> > to talk to a 603 target, and then run "maint info
> > registers".  That
> > will tell you the expected offsets of every
> > register.
> 
> There isn't a registers subcommand under maintenance
> info but there is a maintenance print raw-registers
> command that looks like it gives the desired
> information.  It says that ASR and the two placeholder
> registers have a size of zero.  So, that would imply
> that both the 'G' and 'g' packets would just omit them
> all.  However, I do see GDB trying to read these three
> registers via the 'p' packet.  In that case, should a
> stub reply with an error or an empty response?  It
> doesn't seem possible to returns zeroes since there is
> no size associated with these registers.

Sorry, I maint maint print registers.  raw-reg will work just as well.

I'm not sure (re the P packet).  An empty response won't work.  But 00
should work well enough, or else use 'x'.

-- 
Daniel Jacobowitz
CodeSourcery, LLC