linux-kernel - Re: [RFC] perf tools: Filter out hidden symbols from labels

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Message-ID: <db34cf8a-d929-ffe1-91a5-ed3da0c6df86@redhat.com>
Date:   Wed, 16 Jan 2019 15:47:50 +0000
From:   Nick Clifton <nickc@...hat.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Masami Hiramatsu <mhiramat@...nel.org>, kernel-team@....com
Subject: Re: [RFC] perf tools: Filter out hidden symbols from labels

Hi Arnaldo,

>> Unfortunately the annobin notes will probably not be very helpful as they
>> only record a minor subset of the typical gcc command line options.
>> (Specifically: -O, -g, -D_FORTIFY_SOURCE, -D_GLIBCXX_ASSERTIONS, 
>> -fcf-protection, -fpic (and variants), -fshort-enum, -fstack-clash-protection,
>> -fstack-protector, -mstackrealign, -fexceptions).
> 
> Humm, is -fno-omit-frame-pointer there by any chance? :-)

Not at the moment, although it could be added.  All of the options 
mentioned in the above list are recorded because they have an impact
on the security hardening of the binary.  Other options are ignored
because, at least for now, they have no security implications.

Cheers
  Nick