From: David Laight <David.Laight@ACULAB.COM>
To: 'Hannes Frederic Sowa' <hannes@stressinduktion.org>,
"Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Netdev <netdev@vger.kernel.org>,
"kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>,
Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
"Linux Crypto Mailing List" <linux-crypto@vger.kernel.org>,
"Daniel J . Bernstein" <djb@cr.yp.to>,
Linus Torvalds <torvalds@linux-foundation.org>,
Eric Biggers <ebiggers3@gmail.com>
Subject: RE: [PATCH v2 1/4] siphash: add cryptographically secure hashtable function
Date: Thu, 15 Dec 2016 13:56:30 +0000 [thread overview]
Message-ID: <063D6719AE5E284EB5DD2968C1650D6DB0240437@AcuExch.aculab.com> (raw)
In-Reply-To: <0f3c3694-c00b-aae2-5b08-25bc64bf6372@stressinduktion.org>
From: Hannes Frederic Sowa
> Sent: 15 December 2016 12:50
> On 15.12.2016 13:28, David Laight wrote:
> > From: Hannes Frederic Sowa
> >> Sent: 15 December 2016 12:23
> > ...
> >> Hmm? Even the Intel ABI expects alignment of unsigned long long to be 8
> >> bytes on 32 bit. Do you question that?
> >
> > Yes.
> >
> > The linux ABI for x86 (32 bit) only requires 32bit alignment for u64 (etc).
>
> Hmm, u64 on 32 bit is unsigned long long and not unsigned long. Thus I
> am actually not sure if the ABI would say anything about that (sorry
> also for my wrong statement above).
>
> Alignment requirement of unsigned long long on gcc with -m32 actually
> seem to be 8.
It depends on the architecture.
For x86 it is definitely 4.
It might be 8 for sparc, ppc and/or alpha.
David
next prev parent reply other threads:[~2016-12-15 13:56 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-14 3:59 [PATCH v2 1/4] siphash: add cryptographically secure hashtable function Jason A. Donenfeld
2016-12-14 3:59 ` [PATCH v2 2/4] siphash: add convenience functions for jhash converts Jason A. Donenfeld
2016-12-14 3:59 ` [PATCH v2 3/4] secure_seq: use siphash24 instead of md5_transform Jason A. Donenfeld
2016-12-14 12:53 ` Jason A. Donenfeld
2016-12-14 13:16 ` Hannes Frederic Sowa
2016-12-14 13:44 ` Jason A. Donenfeld
2016-12-14 14:47 ` David Laight
2016-12-14 17:49 ` Jason A. Donenfeld
2016-12-14 17:56 ` David Miller
2016-12-14 18:06 ` Jason A. Donenfeld
2016-12-14 19:22 ` Hannes Frederic Sowa
2016-12-14 19:38 ` Jason A. Donenfeld
2016-12-14 20:27 ` Hannes Frederic Sowa
2016-12-14 20:12 ` Tom Herbert
2016-12-14 21:01 ` Jason A. Donenfeld
2016-12-14 3:59 ` [PATCH v2 4/4] random: use siphash24 instead of md5 for get_random_int/long Jason A. Donenfeld
2016-12-14 11:21 ` [PATCH v2 1/4] siphash: add cryptographically secure hashtable function Hannes Frederic Sowa
2016-12-14 13:10 ` Jason A. Donenfeld
2016-12-14 15:09 ` Hannes Frederic Sowa
2016-12-14 19:47 ` Jason A. Donenfeld
2016-12-15 7:57 ` Herbert Xu
2016-12-15 8:15 ` [kernel-hardening] " Daniel Micay
2016-12-14 12:46 ` Jason A. Donenfeld
2016-12-14 22:03 ` Hannes Frederic Sowa
2016-12-14 23:29 ` Jason A. Donenfeld
2016-12-15 8:31 ` Hannes Frederic Sowa
2016-12-15 11:04 ` David Laight
2016-12-15 12:23 ` Hannes Frederic Sowa
2016-12-15 12:28 ` David Laight
2016-12-15 12:50 ` Hannes Frederic Sowa
2016-12-15 13:56 ` David Laight [this message]
2016-12-15 14:56 ` Hannes Frederic Sowa
2016-12-15 15:41 ` David Laight
2016-12-15 15:53 ` Hannes Frederic Sowa
2016-12-15 18:50 ` Jason A. Donenfeld
2016-12-15 20:31 ` Hannes Frederic Sowa
2016-12-15 20:43 ` Jason A. Donenfeld
2016-12-15 21:04 ` Peter Zijlstra
2016-12-15 21:09 ` Hannes Frederic Sowa
2016-12-15 21:17 ` Hannes Frederic Sowa
2016-12-15 21:09 ` Peter Zijlstra
2016-12-15 21:11 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-15 21:14 ` Linus Torvalds
2016-12-14 18:46 ` [PATCH v3 1/3] " Jason A. Donenfeld
2016-12-14 18:46 ` [PATCH v3 2/3] secure_seq: use siphash24 instead of md5_transform Jason A. Donenfeld
2016-12-14 21:44 ` kbuild test robot
2016-12-14 18:46 ` [PATCH v3 3/3] random: use siphash24 instead of md5 for get_random_int/long Jason A. Donenfeld
2016-12-14 21:56 ` kbuild test robot
2016-12-14 21:57 ` kbuild test robot
2016-12-15 10:14 ` David Laight
2016-12-15 18:51 ` Jason A. Donenfeld
2016-12-14 19:18 ` [PATCH v3 1/3] siphash: add cryptographically secure hashtable function Tom Herbert
2016-12-14 19:35 ` Jason A. Donenfeld
2016-12-14 20:55 ` Jason A. Donenfeld
2016-12-14 21:35 ` Tom Herbert
2016-12-14 22:56 ` Jason A. Donenfeld
2016-12-14 23:14 ` Tom Herbert
2016-12-14 23:17 ` Jason A. Donenfeld
2016-12-18 0:06 ` Christian Kujau
2016-12-14 23:30 ` Linus Torvalds
2016-12-14 23:34 ` Jason A. Donenfeld
2016-12-15 0:10 ` Linus Torvalds
2016-12-15 10:22 ` David Laight
2016-12-14 21:15 ` kbuild test robot
2016-12-14 21:21 ` Jason A. Donenfeld
2016-12-15 1:46 ` [PATCH v4 1/4] " Jason A. Donenfeld
2016-12-15 1:46 ` [PATCH v4 2/4] siphash: add N[qd]word helpers Jason A. Donenfeld
2016-12-15 1:46 ` [PATCH v4 3/4] secure_seq: use siphash instead of md5_transform Jason A. Donenfeld
2016-12-15 1:46 ` [PATCH v4 4/4] random: use siphash instead of MD5 for get_random_int/long Jason A. Donenfeld
2016-12-15 4:23 ` [PATCH v4 1/4] siphash: add cryptographically secure hashtable function kbuild test robot
2016-12-15 21:25 [PATCH v2 " Jason A. Donenfeld
2016-12-15 21:45 ` Hannes Frederic Sowa
2016-12-15 23:43 ` Jason A. Donenfeld
2016-12-16 0:03 ` Hannes Frederic Sowa
2016-12-15 23:47 ` Jason A. Donenfeld
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