Re: [RFA] mips_frame_chain && dummy frames

[Michael Snyder <msnyder at redhat dot com>]

Andrew Cagney wrote:
> 
> > This fixes five FAILS in callfuncs.exp for Irix cc -o32,
> > for backtraces from nested call dummies.  Tested to make sure
> > it doesn't break -n32, either for cc or gcc.
> 
> Yes ok (mips should switch to generic dummy frames but that's another
> story :-).
> 
> Andrew

Thanks, committed.


> > 2002-08-14  Michael Snyder  <msnyder@redhat.com>
> >
> >       * mips-tdep.c (mips_frame_chain): Check for call-dummy frames.
> >
> > Index: mips-tdep.c
> > ===================================================================
> > RCS file: /cvs/src/src/gdb/mips-tdep.c,v
> > retrieving revision 1.101
> > diff -c -3 -p -r1.101 mips-tdep.c
> > *** mips-tdep.c       14 Aug 2002 19:17:39 -0000      1.101
> > --- mips-tdep.c       14 Aug 2002 22:43:48 -0000
> > *************** mips_frame_chain (struct frame_info *fra
> > *** 2294,2302 ****
> >        we loop forever if we see a zero size frame.  */
> >     if (PROC_FRAME_REG (proc_desc) == SP_REGNUM
> >         && PROC_FRAME_OFFSET (proc_desc) == 0
> > !   /* The previous frame from a sigtramp frame might be frameless
> > !      and have frame size zero.  */
> > !       && !frame->signal_handler_caller)
> >       return 0;
> >     else
> >       return get_frame_pointer (frame, proc_desc);
> > --- 2294,2304 ----
> >        we loop forever if we see a zero size frame.  */
> >     if (PROC_FRAME_REG (proc_desc) == SP_REGNUM
> >         && PROC_FRAME_OFFSET (proc_desc) == 0
> > !       /* The previous frame from a sigtramp frame might be frameless
> > !      and have frame size zero.  */
> > !       && !frame->signal_handler_caller
> > !       /* Check if this is a call dummy frame.  */
> > !       && frame->pc != mips_call_dummy_address ())
> >       return 0;
> >     else
> >       return get_frame_pointer (frame, proc_desc);