From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] Simple NX lowmem mappings
Date: Thu, 24 Oct 2013 09:55:26 +0100 [thread overview]
Message-ID: <20131024085525.GE16735@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20131024084502.GT4994@outflux.net>
On Thu, Oct 24, 2013 at 01:45:02AM -0700, Kees Cook wrote:
> Hi,
>
> Thanks for starting this work!
>
> Russel said:
> > -#define MT_MEMORY 9
> > [...]
> > + MT_MEMORY,
> > + MT_MEMORY_NX,
>
> Instead of these names, let's more fully describe the protections. "NX"
> doesn't say anything about RO vs RW. Instead, how about:
>
> MT_MEMORY_RWX (to replace MT_MEMORY)
> MT_MEMORY_RW (as the new "NX" in use for this patch)
>
> for the first change? Then as we move forward, we can add:
>
> MT_MEMORY_R
>
> At which point we'll have the three states.
Yes, we can. We have a few others which should be changed in the same way.
next prev parent reply other threads:[~2013-10-24 8:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-24 7:12 [PATCH] Simple NX lowmem mappings Russell King - ARM Linux
2013-10-24 8:45 ` Kees Cook
2013-10-24 8:55 ` Russell King - ARM Linux [this message]
2013-10-24 17:31 ` Nicolas Pitre
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