Messages in this thread Patch in this message | | | Date | Thu, 6 Mar 2014 09:51:56 -0800 | From | "tip-bot for H. Peter Anvin" <> | Subject | [tip:x86/vdso] x86, vdso32: Disable stack protector, adjust optimizations |
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Commit-ID: 7ed5ee279499a02bf35c77f0a91d657c24f6474e Gitweb: http://git.kernel.org/tip/7ed5ee279499a02bf35c77f0a91d657c24f6474e Author: H. Peter Anvin <hpa@linux.intel.com> AuthorDate: Thu, 6 Mar 2014 09:47:20 -0800 Committer: H. Peter Anvin <hpa@linux.intel.com> CommitDate: Thu, 6 Mar 2014 09:47:20 -0800
x86, vdso32: Disable stack protector, adjust optimizations
For the 32-bit VDSO, match the 64-bit VDSO in:
1. Disable the stack protector. 2. Use -fno-omit-frame-pointer for user space debugging sanity. 3. Use -foptimize-sibling-calls like the 64-bit VDSO does.
Reported-by: Ingo Molnar <mingo@kernel.org> Cc: Stefani Seibold <stefani@seibold.net> Cc: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/1393881143-3569-13-git-send-email-stefani@seibold.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> --- arch/x86/vdso/Makefile | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile index 6cef7a1..55e76eb 100644 --- a/arch/x86/vdso/Makefile +++ b/arch/x86/vdso/Makefile @@ -151,6 +151,9 @@ KBUILD_CFLAGS_32 := $(filter-out -mcmodel=kernel,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out -mfentry,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 += -m32 -msoft-float -mregparm=0 -fpic +KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector) +KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls) +KBUILD_CFLAGS_32 += -fno-omit-frame-pointer $(vdso32-images:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) $(vdso32-images:%=$(obj)/%.dbg): $(obj)/vdso32-%.so.dbg: FORCE \
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