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

[Andrew Donnellan]

On 27/03/17 18:38, Andrew Donnellan wrote:
> On 01/02/17 07:24, Kees Cook wrote:
>> From: Emese Revfy <re.emese at gmail.com>
>>
>> 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?

-- 
Andrew Donnellan              OzLabs, ADL Canberra
andrew.donnellan at au1.ibm.com  IBM Australia Limited