Messages in this thread | | | Date | Tue, 11 Jan 2011 09:06:15 +0000 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH] arm: mm: Poison freed init memory |
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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.
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