Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin

[Kees Cook]

On Mon, Mar 27, 2017 at 8:03 PM, Andrew Donnellan
<andrew.donnellan@xxxxxxxxxxx> wrote:
> On 27/03/17 18:38, Andrew Donnellan wrote:
>>
>> On 01/02/17 07:24, Kees Cook wrote:
>>>
>>> From: Emese Revfy <re.emese@xxxxxxxxx>
>>>
>>> The kernel already has a mechanism to free up code and data memory that
>>> is only used during kernel or module initialization.  This plugin will
>>> teach the compiler to find more such code and data that can be freed
>>> after initialization.
>>
>>
>> Currently checking whether we can wire this up for powerpc without too
>> many problems...
>
>
> Added "select HAVE_GCC_PLUGIN_INITIFY_INIT_EXIT if GCC_PLUGINS" to
> arch/powerpc/Kconfig and have successfully compiled and booted a modular and
> non-modular powernv_defconfig, it looks like we handle the .exit sections
> correctly.
>
> Could this be folded in for further testing when you get around to v6, Kees?

Awesome, thanks for testing! I'll get it queued for a v6...

-Kees

-- 
Kees Cook
Pixel Security