From: Uros Bizjak <ubizjak@gmail.com>
To: Florian Weimer <fweimer@redhat.com>
Cc: Richard Biener <richard.guenther@gmail.com>,
Jakub Jelinek <jakub@redhat.com>, Jeff Law <law@redhat.com>,
Jan Hubicka <jh@suse.cz>, Eric Botcazou <ebotcazou@adacore.com>,
gcc-patches <gcc-patches@gcc.gnu.org>
Subject: Re: RFC: stack/heap collision vulnerability and mitigation with GCC
Date: Tue, 20 Jun 2017 12:20:00 -0000 [thread overview]
Message-ID: <CAFULd4Y1GBiyv=Cn6R_j3mtinbdqxHen5VbkA1Z1UXQKBRU0gg@mail.gmail.com> (raw)
In-Reply-To: <CAFULd4YsYwN1saXYySMnNy4r=f6R1wbe0K4pOMmHM75HYJ5dQg@mail.gmail.com>
On Tue, Jun 20, 2017 at 2:17 PM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On Tue, Jun 20, 2017 at 2:13 PM, Florian Weimer <fweimer@redhat.com> wrote:
>> On 06/20/2017 01:10 PM, Uros Bizjak wrote:
>>
>>> 74,99% a.out a.out [.] test_or
>>> 12,50% a.out a.out [.] test_movb
>>> 12,50% a.out a.out [.] test_movl
>>
>> Could you try notl/notb/negl/negb as well, please?
>
> These all have the same (long) runtime as test_or.
Perhaps we can use "testb $0, %0"? It doesn't write to the memory, but
otherwise has the same runtime as movb/movl.
Uros.
next prev parent reply other threads:[~2017-06-20 12:20 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-19 17:07 Jeff Law
2017-06-19 17:29 ` Jakub Jelinek
2017-06-19 17:45 ` Jeff Law
2017-06-19 17:51 ` Jakub Jelinek
2017-06-19 21:51 ` Jeff Law
2017-06-20 8:03 ` Uros Bizjak
2017-06-20 10:18 ` Richard Biener
2017-06-20 11:10 ` Uros Bizjak
2017-06-20 12:13 ` Florian Weimer
2017-06-20 12:17 ` Uros Bizjak
2017-06-20 12:20 ` Uros Bizjak [this message]
2017-06-20 12:27 ` Richard Biener
2017-06-20 21:57 ` Jeff Law
2017-06-20 15:59 ` Jeff Law
2017-06-19 18:00 ` Richard Biener
2017-06-19 18:02 ` Richard Biener
2017-06-19 18:15 ` Florian Weimer
2017-06-19 21:57 ` Jeff Law
2017-06-19 22:08 ` Jeff Law
2017-06-20 7:50 ` Eric Botcazou
2017-06-19 17:51 ` Joseph Myers
2017-06-19 17:55 ` Jakub Jelinek
2017-06-19 18:21 ` Florian Weimer
2017-06-19 21:56 ` Joseph Myers
2017-06-19 22:05 ` Jeff Law
2017-06-19 22:10 ` Florian Weimer
2017-06-19 19:05 ` Jeff Law
2017-06-19 19:45 ` Jakub Jelinek
2017-06-19 21:41 ` Jeff Law
2017-06-20 8:27 ` Richard Earnshaw (lists)
2017-06-20 15:50 ` Jeff Law
2017-06-19 18:12 ` Richard Kenner
2017-06-19 22:05 ` Jeff Law
2017-06-19 22:07 ` Richard Kenner
2017-06-20 8:21 ` Eric Botcazou
2017-06-20 15:50 ` Jeff Law
2017-06-20 19:48 ` Jakub Jelinek
2017-06-20 20:37 ` Eric Botcazou
2017-06-20 20:46 ` Jeff Law
2017-06-20 8:17 ` Eric Botcazou
2017-06-20 21:52 ` Jeff Law
2017-06-20 22:20 ` Eric Botcazou
2017-06-21 17:31 ` Jeff Law
2017-06-21 19:07 ` Florian Weimer
2017-06-21 7:56 ` Andreas Schwab
2017-06-20 9:27 ` Richard Earnshaw (lists)
2017-06-20 21:39 ` Jeff Law
2017-06-21 8:41 ` Richard Earnshaw (lists)
2017-06-21 17:25 ` Jeff Law
2017-06-22 9:53 ` Richard Earnshaw (lists)
2017-06-22 15:30 ` Jeff Law
2017-06-22 16:07 ` Szabolcs Nagy
2017-06-22 16:15 ` Jeff Law
2017-06-28 6:45 ` Florian Weimer
2017-07-13 23:21 ` Jeff Law
2017-07-18 19:54 ` Florian Weimer
2017-06-20 23:22 Wilco Dijkstra
2017-06-21 8:34 ` Richard Earnshaw (lists)
2017-06-21 8:44 ` Andreas Schwab
2017-06-21 8:46 ` Richard Earnshaw (lists)
2017-06-21 8:46 ` Richard Earnshaw (lists)
2017-06-21 9:03 ` Wilco Dijkstra
2017-06-21 17:05 ` Jeff Law
2017-06-21 17:47 ` Wilco Dijkstra
2017-06-22 16:10 ` Jeff Law
2017-06-22 22:57 ` Wilco Dijkstra
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