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Re: PATCH: Share the dwarf2 unwind code between glibc and gcc 3.0

To: Jason Merrill <jason_merrill at redhat dot com>
Subject: Re: PATCH: Share the dwarf2 unwind code between glibc and gcc 3.0
From: Richard Henderson <rth at redhat dot com>
Date: Mon, 9 Jul 2001 13:15:37 -0700
Cc: Mark Kettenis <kettenis at science dot uva dot nl>, "H . J . Lu" <hjl at lucon dot org>, gcc at gcc dot gnu dot org, GNU C Library <libc-alpha at sourceware dot cygnus dot com>, gcc-patches at gcc dot gnu dot org
References: <20010708194519.A4713@lucon.org> <m366d2fpo7.fsf@prospero.cambridge.redhat.com> <s3ik81i8cyy.fsf@soliton.wins.uva.nl> <m3r8vqe2c1.fsf@prospero.cambridge.redhat.com>

On Mon, Jul 09, 2001 at 01:03:58PM +0100, Jason Merrill wrote:
> I think it makes sense to provide it in glibc for backwards compatibility.
> But it should be a wrapper around the new libgcc APIs if possible.

It isn't possible.  The new API does not export anything at the same
level as __frame_state_for.  The new API correctly does not export
anything that exposes the internals of struct _Unwind_Context.

> We have only committed to backards compatibility for the libgcc ABI.
> Extensions are still possible, even likely.

Indeed.

r~

References:
- PATCH: Share the dwarf2 unwind code between glibc and gcc 3.0
  - From: H . J . Lu
- Re: PATCH: Share the dwarf2 unwind code between glibc and gcc 3.0
  - From: Jason Merrill
- Re: PATCH: Share the dwarf2 unwind code between glibc and gcc 3.0
  - From: Mark Kettenis
- Re: PATCH: Share the dwarf2 unwind code between glibc and gcc 3.0
  - From: Jason Merrill

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