linux-kernel - Re: [RFC] [PATCH 1/2 v2] x86: introduce int3-based instruction patching

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Date:	Thu, 11 Jul 2013 00:14:17 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jason Baron <jbaron@...hat.com>,
	Borislav Petkov <bpetkov@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [RFC] [PATCH 1/2 v2] x86: introduce int3-based instruction
 patching

On Wed, Jul 10, 2013 at 02:56:36PM -0700, H. Peter Anvin wrote:
> No, the idea is that the affected CPU will simply execute int3 -> iret
> ad nauseam until the first byte is repatched, at that point execution
> will resume normally.

Ok, that sounds simple enough. I just hope we don't unearth some silly
cross-modifying code snafus in some CPUs with it. :-)

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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