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| author | kaf24@freefall.cl.cam.ac.uk <kaf24@freefall.cl.cam.ac.uk> | 2004-11-14 15:55:50 +0000 |
|---|---|---|
| committer | kaf24@freefall.cl.cam.ac.uk <kaf24@freefall.cl.cam.ac.uk> | 2004-11-14 15:55:50 +0000 |
| commit | f8beb54e245538a1d5d724fe5a0fa48011483daf (patch) | |
| tree | 26e41033ddbd33fa44526af2e33ba4f32110f383 | |
| parent | adafcbebd29e4d229ed5b0dd339d5f2447885031 (diff) | |
| download | xen-f8beb54e245538a1d5d724fe5a0fa48011483daf.tar.gz xen-f8beb54e245538a1d5d724fe5a0fa48011483daf.tar.bz2 xen-f8beb54e245538a1d5d724fe5a0fa48011483daf.zip | |
bitkeeper revision 1.1159.170.21 (41978006yk1bg04SJNSN2JWccT5adA)
Disable PIE/SSP features when building Xen, if GCC supports them.
| -rw-r--r-- | xen/Rules.mk | 4 | ||||
| -rw-r--r-- | xen/arch/x86/Rules.mk | 6 |
2 files changed, 9 insertions, 1 deletions
diff --git a/xen/Rules.mk b/xen/Rules.mk index ecb20cb35a..63c3a51784 100644 --- a/xen/Rules.mk +++ b/xen/Rules.mk @@ -39,6 +39,8 @@ ALL_OBJS += $(BASEDIR)/arch/$(TARGET_ARCH)/arch.o HOSTCC = gcc HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer +test-gcc-flag = $(shell gcc -v --help 2>&1 | grep -q " $(1) " && echo $(1)) + include $(BASEDIR)/arch/$(TARGET_ARCH)/Rules.mk ifneq ($(debug),y) @@ -62,6 +64,8 @@ ifeq ($(trace),y) CFLAGS += -DTRACE_BUFFER endif +CFLAGS := $(strip $(CFLAGS)) + %.o: %.c $(HDRS) Makefile $(CC) $(CFLAGS) -c $< -o $@ diff --git a/xen/arch/x86/Rules.mk b/xen/arch/x86/Rules.mk index fd4577f48c..bceb1982f4 100644 --- a/xen/arch/x86/Rules.mk +++ b/xen/arch/x86/Rules.mk @@ -14,10 +14,14 @@ else x86_32/usercopy.o: CFLAGS += -O1 endif - # Prevent floating-point variables from creeping into Xen. CFLAGS += -msoft-float +# Disable PIE/SSP if GCC supports them. They can break us. +CFLAGS += $(call test-gcc-flag,-nopie) +CFLAGS += $(call test-gcc-flag,-fno-stack-protector) +CFLAGS += $(call test-gcc-flag,-fno-stack-protector-all) + ifeq ($(TARGET_SUBARCH),x86_32) CFLAGS += -m32 -march=i686 LDFLAGS := --oformat elf32-i386 |