linux-kernel - Re: [RFC][PATCH] A generic boolean

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <E1G96ds-0000ht-HT@be1.lrz>
Date:	Fri, 04 Aug 2006 22:51:15 +0200
From:	Bodo Eggert <7eggert@...tempel.de>
To:	Jes Sorensen <jes@....com>, Andreas Schwab <schwab@...e.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Jeff Garzik <jeff@...zik.org>, ricknu-0@...dent.ltu.se,
	linux-kernel@...r.kernel.org, Andrew Morton <akpm@...l.org>
Subject: Re: [RFC][PATCH] A generic boolean

Jes Sorensen <jes@....com> wrote:
> Andreas Schwab wrote:

>> Try determining the alignment of u64 on i386.  You will be surprised.
> 
> If thats the case, then thats really scary :-( I'd claim it's a bug and
> I am willing to be that iptables isn't the only place that is affected
> or will be in the future.

It's not a bug, since 64 bit integers require only 4-byte-alignment if
addressed by the CPU/FPU. You may benefit from cacheline effects if you
align to 64 bits, but not on i[34]86 (and those define the ABI).

If you want 64-bit-alignment, you can use -malign-double.
-- 
Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF
verbreiteten Lügen zu sabotieren.

http://david.woodhou.se/why-not-spf.html
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/