linux-kernel - Re: [PATCH v3 00/10] x86: ORC unwinder (previously undwarf)

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Message-ID: <20170712223605.fplf4mvvs66rspxh@alap3.anarazel.de>
Date:   Wed, 12 Jul 2017 15:36:05 -0700
From:   Andres Freund <andres@...razel.de>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        live-patching@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>, Jiri Slaby <jslaby@...e.cz>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Mike Galbraith <efault@....de>
Subject: Re: [PATCH v3 00/10] x86: ORC unwinder (previously undwarf)

Hi,

On 2017-07-12 17:32:25 -0500, Josh Poimboeuf wrote:
> If you want perf to be able to use ORC instead of DWARF for user space
> binaries, that's not currently possible, though I don't see any
> technical blockers for doing so.  Perf would need to be taught to read
> ORC data.

Right, that's what I was hoping for.


> And I think it should be possible to convert DWARF to ORC, assuming the
> DWARF data is trusted.  We could probably add an objtool subcommand for
> that.

That'd be pretty helpful.

Greetings,

Andres Freund