linux-kernel - Re: 32bit binaries on x86_64/Xen segfaults in syscall-vdso

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Message-ID: <20090904162003.GA6147@wavehammer.waldi.eu.org>
Date:	Fri, 4 Sep 2009 18:20:04 +0200
From:	Bastian Blank <waldi@...ian.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	544145@...s.debian.org, Keir Fraser <keir.fraser@...citrix.com>
Subject: Re: 32bit binaries on x86_64/Xen segfaults in syscall-vdso

On Fri, Sep 04, 2009 at 09:07:39AM -0700, Jeremy Fitzhardinge wrote:
> But for some reason that's triggering a failsafe callback, which invokes
> a GP.

Hmm, not in my tests. It always returned to userspace correctly and died
some operations later, usually the "ret". This then produced either a
segfault (unreadable address), sigill (if it managed to reach the ELF
header of the ld.so) or a GPF.

Bastian

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