Re: [RFC PATCH v2 15/21] objtool: Don't warn about __cfi_ preambles falling through

[Kees Cook]

On Fri, May 13, 2022 at 01:21:53PM -0700, Sami Tolvanen wrote:
> The __cfi_ preambles contain valid instructions, which embed KCFI
> type information in the following format:
> 
>   __cfi_function:
>     int3
>     int3
>     mov <id>, %eax
>     int3
>     int3
>   function:
>     ...
> 
> While the preambles are STT_FUNC and contain valid instructions,
> they are not executed and always fall through. Skip the warning for
> them.
> 
> Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx>

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook