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From: Andi Kleen <ak@suse.de>
To: Richard Henderson <rth@twiddle.net>
Cc: roland@redhat.com, linux-arch@vger.kernel.org
Subject: Re: waitid fallout
Date: Wed, 15 Sep 2004 08:23:24 +0200	[thread overview]
Message-ID: <20040915062324.GA27164@wotan.suse.de> (raw)
In-Reply-To: <20040915033903.GA904@twiddle.net>

On Tue, Sep 14, 2004 at 08:39:03PM -0700, Richard Henderson wrote:
> Is an *entire* struct rusage required in siginfo_t for sigchld?
> 
> It's much bigger than the 24 (!) words of padding we had reserved
> for expansion in siginfo_t.
> 
> Which means that the size of siginfo_t changed, which means that
> any existing "sigwaitinfo ({ SIGCHLD }, &info)" will now corrupt
> user memory.  Perhaps we think no one does this, but we should
> at least be aware of the ABI change.

Oops. I think this broke x86-64 too.

I don't want to change the signal ABI at all there and would prefer
if this change was reverted.

Thanks,
-Andi

      parent reply	other threads:[~2004-09-15  6:23 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-09-15  3:39 waitid fallout Richard Henderson
2004-09-15  4:37 ` Stephen Rothwell
2004-09-15  5:34   ` Roland McGrath
2004-09-15  6:19     ` Richard Henderson
2004-09-18 13:03     ` Arnd Bergmann
2004-09-20 21:27       ` Roland McGrath
2004-09-15  4:49 ` Richard Henderson
2004-09-15  6:23 ` Andi Kleen [this message]

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