From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: In-Reply-To: <4CB813ED-9D8B-4A32-B4AC-65D27741D46C@kernel.crashing.org> References: <20070709195743.GA26089@ld0162-tx32.am.freescale.net> <200707092225.25287.arnd@arndb.de> <4692A5B8.9010702@freescale.com> <8CA741AA-D200-474F-943D-ECE4B3ACD38B@kernel.crashing.org> <18068.5706.700933.551828@cargo.ozlabs.ibm.com> <89E626D4-D48D-4062-A996-E2DFFE8248E3@kernel.crashing.org> <20070717024246.GA6482@localhost.localdomain> <4CB813ED-9D8B-4A32-B4AC-65D27741D46C@kernel.crashing.org> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: From: Kumar Gala Subject: Re: [PATCH] Allow exec on 32-bit from readable, non-exec pages, with a warning. Date: Tue, 17 Jul 2007 11:30:58 -0500 To: Segher Boessenkool Cc: linuxppc-dev@ozlabs.org, Paul Mackerras , Arnd Bergmann , David Gibson List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Jul 17, 2007, at 10:18 AM, Segher Boessenkool wrote: >>>>> Yeah. Giving the warning is a good thing though. >>>> >>>> No, it isn't; it's just noise, if we're not ever going to do >>>> anything >>>> to prevent the behaviour - and we can't. >>> >>> The same userland code will not run correctly on PPC64 or BookE >>> systems. Is that not a reason to warn? >> >> Way back when, I distinctly recall aborting my plans to implement >> per-page exec on 40x, precisely because of executables like this. > > I noticed some comments to that effect in the BookE code, > yes. It seems userland has been fixed enough that you > could think about enabling it again FWIW. Did I miss the posting of the patch with the fix? - k