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From: "H. Peter Anvin" <hpa@zytor.com>
To: Albert Cahalan <acahalan@gmail.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: JIT emulator needs
Date: Sat, 09 Jun 2007 13:00:49 -0700	[thread overview]
Message-ID: <466B06F1.5030509@zytor.com> (raw)
In-Reply-To: <787b0d920706072335v10d6025cwe1437194b6c60d84@mail.gmail.com>

Albert Cahalan wrote:
> There is an SE Linux execmem restriction that enforces W^X.
> Assuming you don't wish to just disable SE Linux, there are
> two ugly ways around the problem.

This should be fixed in SELinux, or more accurately the SELinux profile.

There is absolutely no other sane option.

Of course, you generally don't need a page to be writable and executable
at the same time, but the overhead of switching can be enormous.

	-hpa

  parent reply	other threads:[~2007-06-09 20:00 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-08  6:35 JIT emulator needs Albert Cahalan
2007-06-08  7:09 ` Eric Dumazet
2007-06-09  4:12   ` Albert Cahalan
2007-06-08 11:10 ` Alan Cox
2007-06-08 16:35   ` Nicholas Miell
2007-06-09  5:17   ` Albert Cahalan
2007-06-09 20:00 ` H. Peter Anvin [this message]
2007-06-19 15:08 ` William Lee Irwin III
2007-06-20  3:16   ` Albert Cahalan
2007-06-20 16:01     ` William Lee Irwin III
2007-06-20 16:37       ` H. Peter Anvin
2007-06-20 17:54         ` William Lee Irwin III
2007-06-20 18:23           ` H. Peter Anvin
2007-06-20 18:25         ` Albert Cahalan
2007-06-20 18:51           ` H. Peter Anvin
2007-06-21  3:21             ` Albert Cahalan
2007-06-21  3:32               ` H. Peter Anvin
2007-06-21  7:38                 ` Albert Cahalan
2007-06-20 18:43       ` Albert Cahalan
2007-06-23  3:52   ` Kyle Moffett
2007-06-24  4:14     ` William Lee Irwin III
2007-06-21 17:44 ` Arjan van de Ven
2007-06-22  5:56   ` Albert Cahalan
2007-06-22 13:43     ` Arjan van de Ven
2007-06-22 14:32       ` Albert Cahalan
2007-06-22 14:42         ` Arjan van de Ven
2007-06-23  2:30           ` Albert Cahalan
     [not found] <8tGiE-2Hv-1@gated-at.bofh.it>
     [not found] ` <8xNvm-2Tw-29@gated-at.bofh.it>
     [not found]   ` <8xYTM-3So-13@gated-at.bofh.it>
2007-06-21 11:08     ` Bodo Eggert

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