diff mbox series

[RFC,v2,01/21] efi/libstub: Filter out CC_FLAGS_CFI

Message ID 20220513202159.1550547-2-samitolvanen@google.com (mailing list archive)
State New, archived
Headers show
Series KCFI support | expand

Commit Message

Sami Tolvanen May 13, 2022, 8:21 p.m. UTC
Explicitly filter out CC_FLAGS_CFI in preparation for the flags being
removed from CC_FLAGS_LTO.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
---
 drivers/firmware/efi/libstub/Makefile | 2 ++
 1 file changed, 2 insertions(+)

Comments

Kees Cook May 14, 2022, 9:42 p.m. UTC | #1
On Fri, May 13, 2022 at 01:21:39PM -0700, Sami Tolvanen wrote:
> Explicitly filter out CC_FLAGS_CFI in preparation for the flags being
> removed from CC_FLAGS_LTO.
> 
> Signed-off-by: Sami Tolvanen <samitolvanen@google.com>

Is it worth merging all the "existing" CC_FLAGS_LTO/CFI splits into a
single patch? Either way:

Reviewed-by: Kees Cook <keescook@chromium.org>
Sami Tolvanen May 16, 2022, 3:44 p.m. UTC | #2
On Sat, May 14, 2022 at 2:42 PM Kees Cook <keescook@chromium.org> wrote:
>
> On Fri, May 13, 2022 at 01:21:39PM -0700, Sami Tolvanen wrote:
> > Explicitly filter out CC_FLAGS_CFI in preparation for the flags being
> > removed from CC_FLAGS_LTO.
> >
> > Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
>
> Is it worth merging all the "existing" CC_FLAGS_LTO/CFI splits into a
> single patch? Either way:

Sure, I can merge them in the next version.

Sami
diff mbox series

Patch

diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index d0537573501e..234fb2910622 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -39,6 +39,8 @@  KBUILD_CFLAGS			:= $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \
 
 # remove SCS flags from all objects in this directory
 KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))
+# disable CFI
+KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_CFI), $(KBUILD_CFLAGS))
 # disable LTO
 KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS))