linux-kernel - Re: [RFC PATCH v1 0/9] arm64: livepatch: Use DWARF Call Frame Information for frame pointer validation

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Message-ID: <20220416010750.cuf7tf5dgd434kac@treble>
Date:   Fri, 15 Apr 2022 18:07:50 -0700
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>
Cc:     mark.rutland@....com, broonie@...nel.org, ardb@...nel.org,
        nobuta.keiya@...itsu.com, sjitindarsingh@...il.com,
        catalin.marinas@....com, will@...nel.org, jmorris@...ei.org,
        linux-arm-kernel@...ts.infradead.org,
        live-patching@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v1 0/9] arm64: livepatch: Use DWARF Call Frame
 Information for frame pointer validation

On Mon, Apr 11, 2022 at 12:18:13PM -0500, Madhavan T. Venkataraman wrote:
> > There are actually several similarities between your new format and ORC,
> > which is also an objtool-created DWARF alternative.  It would be
> > interesting to see if they could be combined somehow.
> > 
> 
> I will certainly look into it. So, if I decide to merge the two, I might want
> to make a minor change to the ORC structure. Would that be OK with you?

Yes, in fact I would expect it, since ORC is quite x86-specific at the
moment.  So it would need some abstractions to make it more multi-arch
friendly.

-- 
Josh