linux-kernel - Re: [PATCH RFC 09/10] unwind: Introduce SFrame user space unwinding

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Message-ID: <20231109144956.0c20fd98@gandalf.local.home>
Date:   Thu, 9 Nov 2023 14:49:56 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Josh Poimboeuf <jpoimboe@...nel.org>
Cc:     Indu Bhagat <indu.bhagat@...cle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        linux-toolchains@...r.kernel.org
Subject: Re: [PATCH RFC 09/10] unwind: Introduce SFrame user space unwinding

On Thu, 9 Nov 2023 11:37:59 -0800
Josh Poimboeuf <jpoimboe@...nel.org> wrote:

> > The structure SFrame FDE in SFRAME_VERSION_1 was unaligned on-disk.  We
> > fixed that in SFRAME_VERSION_2 (Binutils 2.41) by adding some padding as you
> > have already noted. For x86_64, its not an issue though, yes.  
> 
> Agreed.  I actually had v2 implemented but then realized my binutils was
> older so I changed to v1 for testing.  But yeah, we can make v2 the
> minimum.

Cool, my test box has binutils 2.41, so it should be good to go ;-)

-- Steve