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Re: [PATCH] Maintain stack alignment in ____longjmp_chk on x86_64

From: Andreas Schwab <schwab at redhat dot com>
To: Ulrich Drepper <drepper at gmail dot com>
Cc: libc-hacker at sourceware dot org
Date: Thu, 07 Apr 2011 15:39:00 +0200
Subject: Re: [PATCH] Maintain stack alignment in ____longjmp_chk on x86_64
References: <m3oc4ib5x5.fsf@redhat.com><BANLkTi=Knz1pQ+EEJL_4wx+RCbAodfO9yA@mail.gmail.com>

Ulrich Drepper <drepper@gmail.com> writes:

> On Thu, Apr 7, 2011 at 08:29, Andreas Schwab <schwab@redhat.com> wrote:
>> + Â Â Â Â Â Â Â Â Â Â Â call Â Â__GI___fortify_fail; Â Â Â Â Â Â Â Â Â Â Â Â Â\
>> + Â Â Â Â Â Â Â Â Â Â Â nop; Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â\
>
> Why would we need the nop after the call?

For correct unwind information.

Andreas.

-- 
Andreas Schwab, schwab@redhat.com
GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84  5EC7 45C6 250E 6F00 984E
"And now for something completely different."

References:
- [PATCH] Maintain stack alignment in ____longjmp_chk on x86_64
  - From: Andreas Schwab
- Re: [PATCH] Maintain stack alignment in ____longjmp_chk on x86_64
  - From: Ulrich Drepper

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