From: Al Viro <viro@ZenIV.linux.org.uk>
To: David Miller <davem@davemloft.net>
Cc: torvalds@linux-foundation.org, monstr@monstr.eu,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: sigaltstack fun
Date: Mon, 26 Nov 2012 05:15:44 +0000 [thread overview]
Message-ID: <20121126051544.GD4939@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20121126051002.GB4939@ZenIV.linux.org.uk>
On Mon, Nov 26, 2012 at 05:10:02AM +0000, Al Viro wrote:
> On Sun, Nov 18, 2012 at 10:27:24PM -0500, David Miller wrote:
> > > Cc: stable@vger.kernel.org
> > > Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
> >
> > Applied, thanks.
>
> Hmm... There's something odd going on with {rt_,}sigaction on sparc -
> we *do* have sa_restorer in struct sigaction and struct old_sigaction,
> but it's not used for anything whatsoever. There's also a separately
> passed restorer pointer for rt_sigaction() and *that* is used instead,
> but not reported via *oact.
>
> What's the reason for that weirdness? I understand why we do that on
> alpha (we have no sa_restorer in struct sigaction we'd inherited from
> OSF/1), but sparc always had perfectly normal sigaction->sa_restorer
> field all along - even for old sigaction(2)...
PS: speaking of weirdness, what's the reason for sparc and ppc (and nothing
else) expecting the first argument of sigaction(2) to be minus signal
number? ABI archaeology is fun...
next prev parent reply other threads:[~2012-11-26 5:15 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20121016223508.GR2616@ZenIV.linux.org.uk>
2012-10-17 5:32 ` new execve/kernel_thread design Max Filippov
2012-10-17 5:43 ` Al Viro
2012-10-17 5:43 ` Al Viro
[not found] ` <CACM3HyEpypULRWUc5ZnLnZ=uOWf3_j=9PXZiJrT_BXyGcQe9yg@mail.gmail.com>
2012-10-17 14:27 ` Michal Simek
2012-10-17 14:27 ` Michal Simek
2012-10-17 16:07 ` Al Viro
2012-10-17 16:07 ` Al Viro
2012-10-17 16:19 ` Al Viro
2012-10-17 16:19 ` Al Viro
2012-11-15 16:41 ` Michal Simek
2012-11-15 16:41 ` Michal Simek
2012-11-15 21:55 ` Al Viro
2012-11-15 21:55 ` Al Viro
2012-11-16 7:59 ` Michal Simek
2012-11-18 5:45 ` sigaltstack fun (was Re: new execve/kernel_thread design) Al Viro
2012-11-18 18:45 ` Linus Torvalds
2012-11-18 19:03 ` sigaltstack fun David Miller
2012-11-18 19:59 ` Al Viro
2012-11-18 19:59 ` Al Viro
2012-11-18 20:48 ` David Miller
2012-11-19 4:55 ` Greg KH
2012-11-18 21:02 ` Al Viro
2012-11-18 21:18 ` David Miller
2012-11-19 1:10 ` Al Viro
2012-11-19 1:30 ` David Miller
2012-11-19 2:35 ` Al Viro
2012-11-19 2:35 ` Al Viro
2012-11-19 3:27 ` David Miller
2012-11-26 5:10 ` Al Viro
2012-11-26 5:15 ` Al Viro [this message]
2012-12-04 3:03 ` David Miller
2012-12-04 2:58 ` David Miller
2012-11-21 1:53 ` sigaltstack fun (was Re: new execve/kernel_thread design) Al Viro
2012-10-19 20:25 ` [PATCH] tile: support GENERIC_KERNEL_THREAD and GENERIC_KERNEL_EXECVE Chris Metcalf
2012-10-19 20:25 ` Chris Metcalf
2012-10-19 21:35 ` Al Viro
2012-10-20 13:06 ` Chris Metcalf
2012-10-20 15:34 ` Al Viro
2012-10-20 17:16 ` Al Viro
2012-10-23 17:30 ` Chris Metcalf
2012-10-23 18:41 ` Al Viro
2012-10-23 19:22 ` Chris Metcalf
2012-10-23 20:36 ` Al Viro
2012-10-23 20:36 ` Al Viro
2012-10-25 13:31 ` Chris Metcalf
2012-10-25 14:25 ` Al Viro
2012-10-25 14:25 ` Al Viro
2012-10-23 20:47 ` Thomas Gleixner
2012-10-23 20:47 ` Thomas Gleixner
2012-10-23 20:51 ` Jeff King
2012-10-23 20:51 ` Jeff King
2012-10-23 21:09 ` Catalin Marinas
2012-10-23 21:09 ` Catalin Marinas
2012-10-23 21:22 ` Jeff King
2012-10-23 21:22 ` Jeff King
2012-10-24 11:18 ` Catalin Marinas
2012-10-24 11:18 ` Catalin Marinas
2012-10-23 21:25 ` Thomas Gleixner
2012-10-23 21:47 ` Jeff King
2012-10-23 21:47 ` Jeff King
2012-10-23 22:06 ` Marc Gauthier
2012-10-23 22:06 ` Marc Gauthier
2012-10-23 22:23 ` Jeff King
2012-10-24 6:02 ` Johannes Sixt
2012-10-24 6:02 ` Johannes Sixt
2012-10-24 1:02 ` Linus Torvalds
2012-10-24 1:56 ` Al Viro
2012-10-24 2:14 ` Linus Torvalds
2012-10-24 6:02 ` Ingo Molnar
2012-10-24 6:02 ` Ingo Molnar
2012-10-23 17:30 ` [PATCH] arch/tile: eliminate pt_regs trampolines for syscalls Chris Metcalf
2012-10-23 17:30 ` Chris Metcalf
2012-10-22 14:23 ` [PATCH] tile: support GENERIC_KERNEL_THREAD and GENERIC_KERNEL_EXECVE Catalin Marinas
2012-10-26 18:31 ` [update] Re: new execve/kernel_thread design Al Viro
2012-10-26 18:31 ` Al Viro
2012-10-27 3:32 ` Al Viro
2012-10-27 3:32 ` Al Viro
2012-10-29 7:53 ` Martin Schwidefsky
2012-10-29 7:53 ` Martin Schwidefsky
2012-10-29 13:25 ` Al Viro
2012-10-29 13:25 ` Al Viro
2012-10-29 14:38 ` Martin Schwidefsky
2012-10-29 14:38 ` Martin Schwidefsky
2012-10-29 14:57 ` Al Viro
2012-10-29 14:57 ` Al Viro
2012-12-07 22:23 ` Al Viro
2012-12-07 22:23 ` Al Viro
2012-12-08 2:40 ` Chris Metcalf
2012-12-08 2:40 ` Chris Metcalf
2012-12-13 1:54 ` Hirokazu Takata
2012-12-13 1:54 ` Hirokazu Takata
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