Re: [PATCH 3.19 3/3] x86, mpx: Change the MPX enable/disable API to arch_prctl

[Andy Lutomirski]

On Tue, Jan 6, 2015 at 11:16 AM, Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:
> On Tue, Jan 06, 2015 at 10:54:26AM -0800, Dave Hansen wrote:
>> On 01/06/2015 10:41 AM, Andy Lutomirski wrote:
>> > The runtime seems to be here:
>> >
>> > https://software.intel.com/protected-download/267266/144917
>> >
>> > but I'm not going to accept the EULA.
>>
>> That is not the code I'm talking about here.
>
> The MPX run time patch is here (may not be the latest version)
>
> https://gcc.gnu.org/ml/gcc-patches/2014-11/msg01026.html
>

Ah, I see.

Given that it doesn't seen to have been committed yet, I'm not too
worried about compatibility.  And "prctl (43)" doesn't actually seem a
whole lot better than "syscall(SYS_arch_prctl, ARCH_ENABLE_MPX, 0)"
(preprocessor macros ftw!).  But I don't feel that strongly about this
point.

--Andy
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