linux-kernel - Re: [PATCH v2 0/6] unwind, arm64: add sframe unwinder for kernel

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Message-ID: <20251118132054.24b1e90e@gandalf.local.home>
Date: Tue, 18 Nov 2025 13:20:54 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Josh Poimboeuf <jpoimboe@...nel.org>
Cc: Puranjay Mohan <puranjay12@...il.com>, Dylan Hatch
 <dylanbhatch@...gle.com>, Song Liu <song@...nel.org>, Indu Bhagat
 <indu.bhagat@...cle.com>, Peter Zijlstra <peterz@...radead.org>, Will
 Deacon <will@...nel.org>, Catalin Marinas <catalin.marinas@....com>, Jiri
 Kosina <jikos@...nel.org>, Roman Gushchin <roman.gushchin@...ux.dev>,
 Weinan Liu <wnliu@...gle.com>, Mark Rutland <mark.rutland@....com>, Ian
 Rogers <irogers@...gle.com>, linux-toolchains@...r.kernel.org,
 linux-kernel@...r.kernel.org, live-patching@...r.kernel.org,
 joe.lawrence@...hat.com, Puranjay Mohan <puranjay@...nel.org>
Subject: Re: [PATCH v2 0/6] unwind, arm64: add sframe unwinder for kernel

On Mon, 17 Nov 2025 21:18:41 -0800
Josh Poimboeuf <jpoimboe@...nel.org> wrote:

> > > To fix that, I suppose we would need some kind of dynamic ORC
> > > registration interface.  Similar to what has been discussed with
> > > sframe+JIT.  
> > 
> > I work with the BPF JITs and would be interested in exploring this further,
> > can you point me to this discussion if it happened on the list.  
> 
> Sorry, nothing specific has been discussed that I'm aware of :-)

Right, the only discussions have been at the monthly Sframe meetings about
needing to be able to handle this. But the actual implementation details
have not been figured out yet.

-- Steve