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To: Elena Zannoni <ezannoni@redhat.com>
cc: Andrew Cagney <ac131313@cygnus.com>, Richard.Earnshaw@arm.com,
        gdb@sources.redhat.com
Reply-To: Richard.Earnshaw@arm.com
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Subject: Re: REGISTER_BYTE() and pseudos 
In-reply-to: Your message of "Wed, 15 May 2002 13:35:14 EDT."
             <15586.40018.722458.418880@localhost.redhat.com> 
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Date: Wed, 15 May 2002 10:46:00 -0000
From: Richard Earnshaw <rearnsha@arm.com>
X-SW-Source: 2002-05/txt/msg00173.txt.bz2


> Yeah, I was going to chime in, but I am behind on this thread.
> Richard, look at the sh-tdep.c file. I checked in the sh5 work.  It
> still needs another round of cleaning but ti should pretty much all be
> there.

OK, I'll have another look.  

The bit I'm worried about though is if we call something like 
generic_get_saved_register for a pseudo and we hit a call_dummy frame.  
The code in there goes:

      if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
        {
          if (lval)             /* found it in a CALL_DUMMY frame */
            *lval = not_lval;
          if (raw_buffer)
            memcpy (raw_buffer,
                    generic_find_dummy_frame (frame->pc, frame->frame) +
                    REGISTER_BYTE (regnum),
                    REGISTER_RAW_SIZE (regnum));
          return;

Which will try to look up the pseudo in the buffer even if it isn't there.