Re: [PATCH v3 05/39] x86/ibt: Add ANNOTATE_NOENDBR

Josh Poimboeuf
2022-03-04T19:00:03Z

On Thu, Mar 03, 2022 at 12:23:26PM +0100, Peter Zijlstra wrote:
> In order to have objtool warn about code references to !ENDBR
> instruction, we need an annotation to allow this for non-control-flow
> instances -- consider text range checks, text patching, or return
> trampolines etc.
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Reviewed-by: Kees Cook <keescook@chromium.org>
> ---
> include/linux/objtool.h | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)

Also needs copied over to tools/include/linux/objtool.h to avoid the
sync warning.

--
Josh