linux-kernel - Re: [PATCH 04/17] x86, mpx: trace entry to bounds exception paths

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Date:	Fri, 27 Mar 2015 13:02:18 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Dave Hansen <dave@...1.net>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org, tglx@...utronix.de,
	dave.hansen@...ux.intel.com
Subject: Re: [PATCH 04/17] x86, mpx: trace entry to bounds exception paths

On Thu, Mar 26, 2015 at 11:33:38AM -0700, Dave Hansen wrote:
> 
> From: Dave Hansen <dave.hansen@...ux.intel.com>
> 
> There are two basic things that can happen as the result of
> a bounds exception (#BR):
> 
> 	1. We allocate a new bounds table
> 	2. We pass up a bounds exception to userspace.
> 
> This patch adds a trace points for the case where we are

                  a tracepoint

> passing the exception up to userspace with a signal.
> 
> We are also explicit that we're printing out the inverse of
> the 'upper' that we encounter.  If you want to filter, for
> instance, you need to ~ the value first.

			negate
> 
> Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
> ---
> 
>  b/arch/x86/include/asm/trace/mpx.h |   25 +++++++++++++++++++++++++
>  b/arch/x86/mm/mpx.c                |    2 ++
>  2 files changed, 27 insertions(+)

...

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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