linux-kernel - Re: ASM flags in general

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

Date:	Mon, 27 Jul 2015 17:35:43 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andy Lutomirski <luto@...capital.net>
CC:	Andy Lutomirski <luto@...nel.org>,
	Uros Bizjak <uros_bizjak1@....net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	X86 ML <x86@...nel.org>, Uros Bizjak <ubizjak@...il.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: ASM flags in general

However... perhaps we can do the flags stuff first?  There are certainly a ton of changes we ought to do.

On July 27, 2015 4:58:29 PM PDT, Andy Lutomirski <luto@...capital.net> wrote:
>On Mon, Jul 27, 2015 at 4:56 PM, H. Peter Anvin <hpa@...or.com> wrote:
>> Sure... but now you have to wrap things in stac/clac.  I'm not sure I
>see the point since the code is already pretty much optimal.
>
>Ick.  I forgot about that.
>
>It would benefit all the users who aren't using the _ex functions,
>though.  And, if there are enough of those, it just might be worth
>trying to postprocess object files to collapse adjacent stac and clac
>instances, or just to teach the alternatives code to nop them out if
>they're redundant.
>
>--Andy

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.
--
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/