[Bug gdb/15011] unable to fetch function parameters

["deeprtm3997 at gmail dot com" <sourceware-bugzilla@sourceware.org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15011

--- Comment #3 from Deep <deeprtm3997 at gmail dot com> 2013-01-12 09:31:16 UTC ---
(In reply to comment #1)
> From the source it appears that this happens if a DWARF
> location expression requests the CFA for the frame, but the
> frame was found using some other unwinder:
> 
>   if (!frame_unwinder_is (this_frame, &dwarf2_frame_unwind)
>       && !frame_unwinder_is (this_frame, &dwarf2_tailcall_frame_unwind))
>     error (_("can't compute CFA for this frame"));
> 
> Offhand I am not sure under what circumstances this can happen.
> Maybe if you are somehow hitting the special epilogue frame unwinder.
> 
> If the .o file from which 'exec' comes is not too big, maybe
> having it would help.

Well, I am using GDB for the first time(doing an OS course), so I don't know
what is "special epilogue frame unwinder". But I am attaching exec.o, if it
helps.
Thank You.

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