linux-kernel - Re: [PATCH] x86: ptrace debugreg checks rewrite

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Message-ID: <20090504002431.GA17556@x200.localdomain>
Date:	Mon, 4 May 2009 04:24:31 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	akpm@...ux-foundation.org, mingo@...e.hu
Cc:	linux-kernel@...r.kernel.org, containers@...ts.linux-foundation.org
Subject: Re: [PATCH] x86: ptrace debugreg checks rewrite

On Mon, May 04, 2009 at 04:16:01AM +0400, Alexey Dobriyan wrote:
> +static int ptrace_check_debugreg(int _32bit,
> +				 unsigned long dr0, unsigned long dr1,
> +				 unsigned long dr2, unsigned long dr3,
> +				 unsigned long dr6, unsigned long dr7)
> +{
> +	/* Breakpoint type: 00: --x, 01: -w-, 10: undefined, 11: rw- */
> +	unsigned int rw[4];
> +	/* Breakpoint length: 00: 1 byte, 01: 2 bytes, 10: 8 bytes, 11: bytes */
								        4 bytes, of course
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