sh: initial stack protector support.
This implements basic -fstack-protector support, based on the early ARM
version in c743f38013aeff58ef6252601e397b5ba281c633. The SMP case is
limited to the initial canary value, while the UP case handles per-task
granularity (limited to 32-bit sh until a new enough sh64 compiler
manifests itself).
Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Reviewed-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 3fc0f41..24875c8 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -199,6 +199,10 @@
KBUILD_CFLAGS += -fasynchronous-unwind-tables
endif
+ifeq ($(CONFIG_CC_STACKPROTECTOR),y)
+ KBUILD_CFLAGS += -fstack-protector
+endif
+
libs-$(CONFIG_SUPERH32) := arch/sh/lib/ $(libs-y)
libs-$(CONFIG_SUPERH64) := arch/sh/lib64/ $(libs-y)