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Wed, 22 Apr 2026 14:15:38 +0000 (GMT) Received: from [9.52.200.195] (unknown [9.52.200.195]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 22 Apr 2026 14:15:38 +0000 (GMT) Message-ID: <75ca4b07-68d3-47e0-b506-e1ac3e0adc1b@linux.ibm.com> Date: Wed, 22 Apr 2026 16:15:36 +0200 Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 2/8] arm64, unwind: build kernel with sframe V3 info To: Dylan Hatch , Roman Gushchin , Weinan Liu , Will Deacon , Josh Poimboeuf , Indu Bhagat , Peter Zijlstra , Steven Rostedt , Catalin Marinas , Jiri Kosina Cc: Mark Rutland , Prasanna Kumar T S M , Puranjay Mohan , Song Liu , 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 , Heiko Carstens References: <20260421225200.1198447-1-dylanbhatch@google.com> <20260421225200.1198447-3-dylanbhatch@google.com> Content-Language: en-US From: Jens Remus Organization: IBM Deutschland Research & Development GmbH In-Reply-To: <20260421225200.1198447-3-dylanbhatch@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: t3HRqGGK_i_Yl4LaWFOvINcxtVGH9_97 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDIyMDEzMyBTYWx0ZWRfX2Xkqdbrw1uv8 YX+9kZPJJWcZAaVKAs9Zwf5tUipKKt3Juj03jSorDvZO4VOscI10+1W9J33dWC7SpDPMG6HvsbD VO1qyLAP3Jusm3KvT80XAFnn0GcOWvUaaXYTqjUm8icjp1gM5cZAYrB26Aq0EPNNQ7qpFibcKsR yX+PhB/q2wj5VeduleoFEfRATazFFgln2dH+8xvZo/k34J6BZNexMIkyipe8KNZRfaBeEbzZXdI pvvgvFi6hOzDS3DQp9sV+7E00MQVUxt/GF3xZOQN18W/M9LoLf9bCmijag3h3mpEVE/DbS/Tay1 qNrBIKIuS0JyVVfllgeOWOB89AqV66GNVC+xr3FcS3N3hbqeZ33+NnBjAVqSbTM5vC2sWmk9A0v WB/5nE8+P5Rp/VYQr4uqkJeRxl6B6jEeNrYUCcOiDrP73CVYQpIwp69nEEApYDdhspFid/zX3vd revydFaQjvxXrtRtYDQ== X-Authority-Analysis: v=2.4 cv=C8LZDwP+ c=1 sm=1 tr=0 ts=69e8d80e cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=1XWaLZrsAAAA:8 a=yMhMjlubAAAA:8 a=OkMzWxJWX9Yub-M4blUA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: xRYr_-EYw2zLm_vWkwdVBgRvd_nJ0I-8 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-22_01,2026-04-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 clxscore=1011 bulkscore=0 impostorscore=0 spamscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604220133 On 4/22/2026 12:51 AM, Dylan Hatch wrote: > Build with -Wa,--gsframe-3 flags to generate a .sframe section. This > will be used for in-kernel reliable stacktrace in cases where the frame > pointer alone is insufficient. > > Currently, the sframe format only supports arm64, x86_64 and s390x > architectures. > > Signed-off-by: Weinan Liu > Reviewed-by: Prasanna Kumar T S M > Signed-off-by: Dylan Hatch Reviewed-by: Jens Remus > --- > MAINTAINERS | 1 + > Makefile | 8 ++++++++ > arch/Kconfig | 21 +++++++++++++++++++++ > arch/arm64/Kconfig | 1 + > arch/arm64/include/asm/unwind_sframe.h | 8 ++++++++ > arch/arm64/kernel/vdso/Makefile | 2 +- > include/asm-generic/sections.h | 4 ++++ > include/asm-generic/vmlinux.lds.h | 15 +++++++++++++++ > 8 files changed, 59 insertions(+), 1 deletion(-) > create mode 100644 arch/arm64/include/asm/unwind_sframe.h 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/