Re: [RFC PATCH v3 15/20] objtool: Disable CFI warnings

[Josh Poimboeuf]

On Fri, Jun 10, 2022 at 04:35:08PM -0700, Sami Tolvanen wrote:
> The __cfi_ preambles contain int3 padding and a mov instruction that
> embeds the KCFI type identifier in the following format:
> 
>   ; type preamble
>   __cfi_function:
>     int3
>     int3
>     mov <id>, %eax
>     int3
>     int3
>   function:
>     ...
> 
> While the preamble symbols are STT_FUNC and contain valid
> instructions, they are never executed and always fall through. Skip
> the warning for them.
> 
> .kcfi_traps sections point to CFI traps in text sections. Also skip
> the warning about them referencing !ENDBR instructions.
> 
> Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx>

Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>

-- 
Josh