Re: [PATCH 0/7] Intel(R) MPX registers support.

[Mark Kettenis <mark.kettenis@xs4all.nl>]

> From: Walfred Tedeschi <walfred.tedeschi@intel.com>
> Date: Wed, 21 Aug 2013 14:45:41 +0200
> 
> This patch series adds support for the Intel(R) Memory Protection Extension
> MPX registers. Native and remote debugging are covered by this patch.
> 
> New registers are bound registers known as bnd register (bnd0...bnd3), a
> config register bndcfgu and a status register bndstatus.  Bound registers
> store pointer bounds, i.e. bound limits of a pointer.  Bndstatus and bndcfgu
> store information of the current status and configuration of other MPX 
> counterparts.  For more information [1][2].
> 
> Design notes:
> Bound register are represented in hardware as two fields of 64bits each,
> both in 64bit and 32bit mode. The fields are lower bound and upper bound.
> Upper bound value is a complement of one value of the upper limiting
> address. To take this into account the bnd0...bnd3 are created as 
> pseudo registers while the hardware values are stored on bnd0raw...bnd3raw.
> 
> Ok to commit?

Hi Walfred,

I had a quick look at the diffs.  Generally looks good.  There is an
issue though with how you handled the Linux-specific "orig_[er]ax"
fake register in the GDB interal register mapping.  Can you change
things such that it remains at the very hand of the internal register
file?

I may not be able to do a full review of the changes in the next 2.5
weeks.  A friendly reminder somewhere after Sep 9 wouldn't hurt ;).

Cheers,

Mark