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Re: call frame instruction encodings ?
- From: Richard Henderson <rth at redhat dot com>
- To: Andreas Tobler <toa at pop dot agri dot ch>
- Cc: David Edelsohn <dje at watson dot ibm dot com>, GCC <gcc at gcc dot gnu dot org>
- Date: Mon, 20 Jan 2003 14:46:56 -0800
- Subject: Re: call frame instruction encodings ?
- References: <200301181626.LAA31952@makai.watson.ibm.com> <3E2981A7.60904@pop.agri.ch>
On Sat, Jan 18, 2003 at 05:32:39PM +0100, Andreas Tobler wrote:
> case DW_CFA_GNU_negative_offset_extended:
> /* Obsoleted by DW_CFA_offset_extended_sf, but used by
> older PowerPC code. */
>
> In other words I should not use it when writing eh-frame info for darwin?
Well, I imagine we'll support it forever in the unwinder. But there's
probably no reason _not_ to change to DW_CFA_offset_extended_sf in the
PPC backend. We've supported DW_CFA_offset_extended_sf since gcc 3.0,
and the current unwind info isn't portable back to gcc 2.95 at all.
> Is the 2.1 draft available on the net as well? I only have 2.0.0 93
The readings page has a link. Do recall that it's now dwarf3,
not 2.1.
r~