Re: [kernel-hardening] [PATCH v8 2/4] GCC plugin infrastructure

On Wed, 2016-05-18 at 12:33 +0200, Emese Revfy wrote:

quoted

I've done some basic sanity testing on powerpc with the cyclomatic 
complexity plugin (with LE native + cross-compilers) and it seems to 
work with the patch below.

Signed-off-by: Andrew Donnellan <redacted>

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a18a0dc..0cfed5b 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig

@@ -97,6 +97,7 @@ config PPC
         select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
         select HAVE_FUNCTION_TRACER
         select HAVE_FUNCTION_GRAPH_TRACER
+       select HAVE_GCC_PLUGINS
         select SYSCTL_EXCEPTION_TRACE
         select ARCH_WANT_OPTIONAL_GPIOLIB
         select VIRT_TO_BUS if !PPC64

Hi,

Did you test the plugins with all gcc versions (4.5-6)?

What's the concern about gcc versions? Just not breaking the build on old
compilers?

I'm pretty sure powerpc big endian still builds with gcc 4.4.

However if Andrew's only tested on little endian, then that select should be
guarded with an "if CPU_LITTLE_ENDIAN". And to build LE you need gcc >= 4.9.

cheers