Re: Incorrect DWARF-2 register numbers on PPC64?

[Mark Kettenis <kettenis@chello.nl>]

   Date: Fri, 9 Jan 2004 13:04:42 +1030
   From: Alan Modra <amodra@bigpond.net.au>

   On Wed, Jan 07, 2004 at 09:01:31PM -0800, Geoff Keating wrote:
   > That will also mean that executables built with a new version of GCC won't
   > run on operating systems with an old libgcc.  For Darwin, because of
   > historical mistakes involving non-shared libgcc, it will make life
   > very difficult.

   I hadn't thought of that.  This means we are stuck with the current
   .eh_frame register numbering.

I was afraid of that :-(.  

   It should be possible to fix .debug_frame with something like the
   following totally untested patch.  I'm throwing it out to the list
   now for comment.

That way we can hope that GCC's .dwarf_frame will be compatible with
DWARF CFI generated by other compilers, which would be a great win I
think.  GDB doesn't support different register encodings for .eh_frame
and .dwarf_frame yet, but that should be fixable; we can distinguish
between the two.

Mark