linux-kernel - Re: [PATCH AUTOSEL 5.11 31/52] x86, build: use objtool mcount

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Message-ID: <YEvm8ggvHis0tkFp@sashalap>
Date:   Fri, 12 Mar 2021 17:10:58 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Sami Tolvanen <samitolvanen@...gle.com>
Subject: Re: [PATCH AUTOSEL 5.11 31/52] x86, build: use objtool mcount

On Tue, Mar 02, 2021 at 10:42:57AM -0800, Kees Cook wrote:
>On Tue, Mar 02, 2021 at 06:55:12AM -0500, Sasha Levin wrote:
>> From: Sami Tolvanen <samitolvanen@...gle.com>
>>
>> [ Upstream commit 6dafca97803309c3cb5148d449bfa711e41ddef2 ]
>>
>> Select HAVE_OBJTOOL_MCOUNT if STACK_VALIDATION is selected to use
>> objtool to generate __mcount_loc sections for dynamic ftrace with
>> Clang and gcc <5 (later versions of gcc use -mrecord-mcount).
>>
>> Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>
>> Reviewed-by: Kees Cook <keescook@...omium.org>
>> Signed-off-by: Sasha Levin <sashal@...nel.org>
>
>This one doesn't make sense without all the other objtool changes for
>it. Please drop this from autosel.

Dropped, thanks!

-- 
Thanks,
Sasha