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Re: LSDA unwind information is off by one (in __gcc_personality_v0)

From: Florian Weimer <fweimer at redhat dot com>
To: Eric Botcazou <ebotcazou at adacore dot com>
Cc: gcc at gcc dot gnu dot org, Andreas Schwab <schwab at linux-m68k dot org>, "gcc at gnu dot org" <gcc at gnu dot org>
Date: Fri, 21 Oct 2016 10:38:54 +0200
Subject: Re: LSDA unwind information is off by one (in __gcc_personality_v0)
Authentication-results: sourceware.org; auth=none
References: <18b8eb6f-48ab-984f-a416-bd632ddf9a49@redhat.com> <87pomv7xf3.fsf@linux-m68k.org> <b14736e4-86c9-fc5a-fefe-7ad703d507b6@redhat.com> <8690520.mzDSmneJzv@polaris>

On 10/21/2016 12:08 AM, Eric Botcazou wrote:

We don't call _Unwind_GetIPInfo from __gcc_personality_v0 because
HAVE_GETIPINFO is not defined. This happens only when using the system
unwinder on ia64, if I'm not mistaken.

Disassembly shows that the code is not compiled in and not part of
libgcc_s.so.1, although _Unwind_GetIPInfo itself has been defined.


Then that's the bug, the C++ and Ada personality rountines call it.


Thanks, I did not realize we had so many different implementations.

Florian

References:
- LSDA unwind information is off by one (in __gcc_personality_v0)
  - From: Florian Weimer
- Re: LSDA unwind information is off by one (in __gcc_personality_v0)
  - From: Andreas Schwab
- Re: LSDA unwind information is off by one (in __gcc_personality_v0)
  - From: Florian Weimer
- Re: LSDA unwind information is off by one (in __gcc_personality_v0)
  - From: Eric Botcazou

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