Re: Incorrect DWARF-2 register numbers on PPC64?

[Alan Modra <amodra@bigpond.net.au>]

On Tue, Jan 06, 2004 at 02:34:29PM -0800, Geoff Keating wrote:
> > Date: Tue, 06 Jan 2004 17:08:40 -0500
> > From: David Edelsohn <dje@watson.ibm.com>
> 
> > >>>>> Geoff Keating writes:
> > 
> > Geoff> Then, doesn't this patch break stabs under ELF?
> > 
> > 	The patch only maps the register number for DWARF2_DEBUG:
> > 
> > +  if (regno <= 63 || write_symbols != DWARF2_DEBUG)
> > +    return regno;
> > 
> > However, there is no reason to waste the time computing a no-op
> > transformation on targets that do not have a choice of Dwarf2 debugging.
> 
> OK.  It'd probably be better to have this at the toplevel and an undef
> for AIX, since Darwin will one day have DWARF, but that can be done
> later.

I originally put the DBX_REGISTER_NUMBER define in rs6000.h, but quickly
found that was #undef'd by config/svr4.h, which is included later.  If
you want the define in rs6000.h, that can be done by either removing the
#undef in svr4.h, or including rs6000.h after svr4.h.  I've done the
work to verify that you can include rs6000.h later by adding a few
#undefs in rs6000.h, and defining SIZE_TYPE in rs6000/sysv4.h (in fact,
I wrote the patch that way in the first instance), but decided that
resulted in a much more intrusive patch.

-- 
Alan Modra
IBM OzLabs - Linux Technology Centre