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Date: Tue, 27 Sep 2016 15:39:17 -0700
From: "LeMay, Michael" <michael.lemay@...el.com>
To: "musl@...ts.openwall.com" <musl@...ts.openwall.com>
Subject: [RFC PATCH 7/7] add compiler flags to enable SafeStack
This adds the necessary compiler flags to build a
segmentation-hardened SafeStack runtime for 32-bit x86 Linux programs
with LLVM Clang.
Signed-off-by: Michael LeMay <michael.lemay@...el.com>
---
Makefile | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Makefile b/Makefile
index ec54880..b4203bb 100644
--- a/Makefile
+++ b/Makefile
@@ -128,6 +128,14 @@ NOSSP_SRCS = $(wildcard crt/*.c) \
ldso/dlstart.c ldso/dynlink.c
$(NOSSP_SRCS:%.c=obj/%.o) $(NOSSP_SRCS:%.c=obj/%.lo): CFLAGS_ALL +=
$(CFLAGS_NOSSP)
+ifeq ($(SAFE_STACK),yes)
+
+CFLAGS_SAFE_STACK = -DSAFE_STACK=1 -fsanitize=safe-stack -fruntime-init
-mseparate-stack-seg
+NON_CRT_OBJS = $(filter-out $(CRT_OBJS),$(ALL_OBJS))
+$(NON_CRT_OBJS) $(NON_CRT_OBJS:%.o=%.lo): CFLAGS_ALL +=
$(CFLAGS_SAFE_STACK)
+
+endif
+
$(CRT_OBJS): CFLAGS_ALL += -DCRT
$(LOBJS) $(LDSO_OBJS): CFLAGS_ALL += -fPIC
--
2.7.4
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