From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm: mm: Poison freed init memory
Date: Tue, 11 Jan 2011 09:06:15 +0000 [thread overview]
Message-ID: <20110111090615.GH12552@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <4D2BE3E1.5060706@codeaurora.org>
On Mon, Jan 10, 2011 at 09:00:17PM -0800, Stephen Boyd wrote:
> Ok it seems that 0xcc was chosen by Pavel since it's a breakpoint
> instruction (sorry for not noticing that earlier [1]).
It may be on x86, but on ARM:
0: cccccccc stclgt 12, cr12, [ip], {204}
That's a co-processor #12 instruction which will only be executed of
the processor condition codes satisfy 'gt'.
> There was some discussion about handling initdata with Pavel's patch
> but it seems that nothing came of it?
I'm not sure who this Pavel is who you keep referring to - the message
you link to is a discussion between William Irvin and hpa.
> How about we use 0xe7fddef0? This seems to satisfy at least your first
> point for both ARM and Thumb mode (Thumb will branch to the 0xdef0
> instruction).
Yup.
next prev parent reply other threads:[~2011-01-11 9:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-05 19:47 [PATCH] arm: mm: Poison freed init memory Stephen Boyd
2011-01-05 20:26 ` Russell King - ARM Linux
2011-01-06 5:25 ` Stephen Boyd
2011-01-06 9:07 ` Russell King - ARM Linux
2011-01-11 5:00 ` Stephen Boyd
2011-01-11 9:06 ` Russell King - ARM Linux [this message]
2011-01-11 13:33 ` Pavel Machek
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