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Commit 008cc907 authored Mar 17, 2014 by H. Peter Anvin

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>
Signed-off-by: Stefani Seibold <stefani@seibold.net>
Link: http://lkml.kernel.org/r/1395094933-14252-13-git-send-email-stefani@seibold.net


Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

parent 309944be

arch/x86/vdso/Makefile

+3 −0

Original line number	Diff line number	Diff line
		@@ -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 \