On Wed, Jun 22, 2016 at 7:37 PM, Dmitry Vyukov <dvyu...@google.com> wrote: > Latest gcc manages to emit MOVDQA into boot code > which leads to crashes. Add more -mno-see flags. > > Signed-off-by: Dmitry Vyukov <dvyu...@google.com> > --- > arch/x86/boot/compressed/Makefile | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/x86/boot/compressed/Makefile > b/arch/x86/boot/compressed/Makefile > index f135688..7eaafb8 100644 > --- a/arch/x86/boot/compressed/Makefile > +++ b/arch/x86/boot/compressed/Makefile > @@ -31,7 +31,7 @@ KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING > cflags-$(CONFIG_X86_32) := -march=i386 > cflags-$(CONFIG_X86_64) := -mcmodel=small > KBUILD_CFLAGS += $(cflags-y) > -KBUILD_CFLAGS += -mno-mmx -mno-sse > +KBUILD_CFLAGS += -mno-mmx -mno-sse -mno-sse2 -mno-sse3 > KBUILD_CFLAGS += $(call cc-option,-ffreestanding) > KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector) > > -- > 2.8.0.rc3.226.g39d4020
I withdraw this patch. >From off-list discussion: "-mno-sse alone should disable all SSE/AVX instructions. If not, please file a GCC bug report".
