On Mon, 6 Apr 2020 at 18:42, Sami Tolvanen <samitolvanen@xxxxxxxxxx> wrote: > > Shadow stacks are not available in the EFI stub, filter out SCS flags. > > Suggested-by: James Morse <james.morse@xxxxxxx> > Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx> > --- > drivers/firmware/efi/libstub/Makefile | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile > index 094eabdecfe6..fa0bb64f93d6 100644 > --- a/drivers/firmware/efi/libstub/Makefile > +++ b/drivers/firmware/efi/libstub/Makefile > @@ -32,6 +32,9 @@ KBUILD_CFLAGS := $(cflags-y) -DDISABLE_BRANCH_PROFILING \ > $(call cc-option,-fno-stack-protector) \ > -D__DISABLE_EXPORTS > > +# remove SCS flags from all objects in this directory > +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) > + > GCOV_PROFILE := n > KASAN_SANITIZE := n > UBSAN_SANITIZE := n > -- > 2.26.0.292.g33ef6b2f38-goog >
