[kernel-hardening,v5,2/5] GCC plugin infrastructure

Message ID 20160309090115.GA6964@davidb.org
State New
Headers show

Commit Message

David Brown March 9, 2016, 9:01 a.m.
On Mon, Mar 07, 2016 at 12:04:27AM +0100, Emese Revfy wrote:

>This patch allows to build the whole kernel with GCC plugins. It was ported from

>grsecurity/PaX. The infrastructure supports building out-of-tree modules and

>building in a separate directory. Cross-compilation is supported too but

>currently only the x86 architecture enables plugins.


I've tested this with both ARM and ARM64.  There are some missing
headers in the arm64 gcc, reported here:
https://bugs.linaro.org/show_bug.cgi?id=2123 (also upstream), but this
should work once that is fixed.

Feel free to fold these into your patch, or, if you prefer, I can send
out separate patches for them.

Signed-off-by: David Brown <david.brown@linaro.org>


--

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diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4f799e5..67ee8e3 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -54,6 +54,7 @@  config ARM
 	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
 	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
 	select HAVE_GENERIC_DMA_COHERENT
+	select HAVE_GCC_PLUGINS
 	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
 	select HAVE_IDE if PCI || ISA || PCMCIA
 	select HAVE_IRQ_TIME_ACCOUNTING
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 8cc6228..6d6e4f8 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -70,6 +70,7 @@  config ARM64
 	select HAVE_FTRACE_MCOUNT_RECORD
 	select HAVE_FUNCTION_TRACER
 	select HAVE_FUNCTION_GRAPH_TRACER
+	select HAVE_GCC_PLUGINS
 	select HAVE_GENERIC_DMA_COHERENT
 	select HAVE_HW_BREAKPOINT if PERF_EVENTS
 	select HAVE_IRQ_TIME_ACCOUNTING