From: Jens Remus <jremus@linux.ibm.com>
To: Dylan Hatch <dylanbhatch@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Weinan Liu <wnliu@google.com>, Will Deacon <will@kernel.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Indu Bhagat <ibhagatgnu@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Jiri Kosina <jikos@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
Prasanna Kumar T S M <ptsm@linux.microsoft.com>,
Puranjay Mohan <puranjay@kernel.org>, Song Liu <song@kernel.org>,
joe.lawrence@redhat.com, linux-toolchains@vger.kernel.org,
linux-kernel@vger.kernel.org, live-patching@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Randy Dunlap <rdunlap@infradead.org>
Subject: Re: [PATCH v4 3/8] arm64: entry: add unwind info for various kernel entries
Date: Wed, 22 Apr 2026 16:18:35 +0200 [thread overview]
Message-ID: <6a50cb4a-54d4-465e-9bf0-8419c9f61338@linux.ibm.com> (raw)
In-Reply-To: <20260421225200.1198447-4-dylanbhatch@google.com>
On 4/22/2026 12:51 AM, Dylan Hatch wrote:
> From: Weinan Liu <wnliu@google.com>
>
> DWARF CFI (Call Frame Information) specifies how to recover the return
> address and callee-saved registers at each PC in a given function.
> Compilers are able to generate the CFI annotations when they compile
> the code to assembly language. For handcrafted assembly, we need to
> annotate them by hand.
>
> Annotate minimal CFI to enable stacktracing using SFrame for kernel
> exception entries through el1*_64_*() paths and irq entries through
> call_on_irq_stack()
>
> Signed-off-by: Weinan Liu <wnliu@google.com>
> Signed-off-by: Dylan Hatch <dylanbhatch@google.com>
> Suggested-by: Jens Remus <jremus@linux.ibm.com>
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
> ---
> arch/arm64/kernel/entry.S | 23 +++++++++++++++++++++++
> 1 file changed, 23 insertions(+)
Regards,
Jens
--
Jens Remus
Linux on Z Development (D3303)
jremus@de.ibm.com / jremus@linux.ibm.com
IBM Deutschland Research & Development GmbH; Vorsitzender des Aufsichtsrats: Wolfgang Wendt; Geschäftsführung: David Faller; Sitz der Gesellschaft: Ehningen; Registergericht: Amtsgericht Stuttgart, HRB 243294
IBM Data Privacy Statement: https://www.ibm.com/privacy/
next prev parent reply other threads:[~2026-04-22 14:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-21 22:51 [PATCH v4 0/8] unwind, arm64: add sframe unwinder for kernel Dylan Hatch
2026-04-21 22:51 ` [PATCH v4 1/8] sframe: Allow kernelspace sframe sections Dylan Hatch
2026-04-22 14:08 ` Jens Remus
2026-04-22 15:15 ` Dylan Hatch
2026-04-21 22:51 ` [PATCH v4 2/8] arm64, unwind: build kernel with sframe V3 info Dylan Hatch
2026-04-22 14:15 ` Jens Remus
2026-04-21 22:51 ` [PATCH v4 3/8] arm64: entry: add unwind info for various kernel entries Dylan Hatch
2026-04-22 14:18 ` Jens Remus [this message]
2026-04-21 22:51 ` [PATCH v4 4/8] sframe: Provide PC lookup for vmlinux .sframe section Dylan Hatch
2026-04-21 22:51 ` [PATCH v4 5/8] sframe: Allow unsorted FDEs Dylan Hatch
2026-04-21 22:51 ` [PATCH v4 6/8] arm64/module, sframe: Add sframe support for modules Dylan Hatch
2026-04-21 22:51 ` [PATCH v4 7/8] sframe: Introduce in-kernel SFRAME_VALIDATION Dylan Hatch
2026-04-22 14:11 ` Jens Remus
2026-04-21 22:52 ` [PATCH v4 8/8] unwind: arm64: Use sframe to unwind interrupt frames Dylan Hatch
2026-04-22 14:25 ` Jens Remus
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