From: Dylan Hatch <dylanbhatch@google.com>
To: Puranjay Mohan <puranjay12@gmail.com>
Cc: Song Liu <song@kernel.org>, Josh Poimboeuf <jpoimboe@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Indu Bhagat <indu.bhagat@oracle.com>,
Peter Zijlstra <peterz@infradead.org>,
Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Jiri Kosina <jikos@kernel.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Weinan Liu <wnliu@google.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Rogers <irogers@google.com>,
linux-toolchains@vger.kernel.org, linux-kernel@vger.kernel.org,
live-patching@vger.kernel.org, joe.lawrence@redhat.com,
Puranjay Mohan <puranjay@kernel.org>
Subject: Re: [PATCH v2 0/6] unwind, arm64: add sframe unwinder for kernel
Date: Fri, 14 Nov 2025 22:50:16 -0800 [thread overview]
Message-ID: <CADBMgpwZ32+shSa0SwO8y4G-Zw14ae-FcoWreA_ptMf08Mu9dA@mail.gmail.com> (raw)
In-Reply-To: <CANk7y0hUKOVXRKoJ5Ufmg-5DGSe2F5nBH+O7tLVvLRs9Oe54uA@mail.gmail.com>
On Mon, Sep 29, 2025 at 12:55 PM Puranjay Mohan <puranjay12@gmail.com> wrote:
>
> I will try to debug this more but am just curious about BPF's
> interactions with sframe.
> The sframe data for bpf programs doesn't exist, so we would need to
> add that support
> and that wouldn't be trivial, given the BPF programs are JITed.
>
> Thanks,
> Puranjay
From what I can tell, the ORC unwinder in x86 falls back to using
frame pointers in cases of generated code, like BPF. Would matching
this behavior in the sframe unwinder be a reasonable approach, at
least for the purposes of enabling reliable unwind for livepatch?
Thanks,
Dylan
next prev parent reply other threads:[~2025-11-15 6:50 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-04 22:38 [PATCH v2 0/6] unwind, arm64: add sframe unwinder for kernel Dylan Hatch
2025-09-04 22:38 ` [PATCH v2 1/6] unwind: build kernel with sframe info Dylan Hatch
2025-11-14 13:34 ` Will Deacon
2025-11-19 14:59 ` Jens Remus
2025-09-04 22:38 ` [PATCH v2 2/6] arm64: entry: add unwind info for various kernel entries Dylan Hatch
2025-09-04 22:38 ` [PATCH v2 3/6] unwind: add sframe v2 header Dylan Hatch
2025-09-04 22:38 ` [PATCH v2 4/6] unwind: Implement generic sframe unwinder library Dylan Hatch
2025-09-09 16:44 ` Puranjay Mohan
2025-09-09 18:39 ` Indu Bhagat
2025-09-04 22:38 ` [PATCH v2 5/6] arm64/module, unwind: Add sframe support for modules Dylan Hatch
2025-09-04 22:38 ` [PATCH v2 6/6] unwind: arm64: Add reliable stacktrace with sframe unwinder Dylan Hatch
2025-09-17 23:41 ` Josh Poimboeuf
2025-11-15 6:44 ` Dylan Hatch
2025-11-17 23:01 ` Josh Poimboeuf
2025-11-19 3:17 ` Dylan Hatch
2025-11-19 7:12 ` Indu Bhagat
2025-09-29 19:46 ` [PATCH v2 0/6] unwind, arm64: add sframe unwinder for kernel Song Liu
2025-09-29 19:55 ` Puranjay Mohan
2025-11-15 6:50 ` Dylan Hatch [this message]
2025-11-17 23:06 ` Josh Poimboeuf
2025-11-17 23:42 ` Steven Rostedt
2025-11-18 0:10 ` Josh Poimboeuf
2025-11-18 0:49 ` Puranjay Mohan
2025-11-18 5:18 ` Josh Poimboeuf
2025-11-18 18:20 ` Steven Rostedt
2025-11-18 18:29 ` Indu Bhagat
2025-11-17 23:50 ` Puranjay Mohan
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