From nobody Sat Feb 7 20:58:03 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5AF8F213E71; Tue, 13 May 2025 22:35:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747175726; cv=none; b=I1Ye32TU0yHYVBBe7PAgR/wB5i+qblPbpSsc9kw3EdTCZhcLwOebFzAMO7iTuTmcySN4s08VrS0dBNVvQ1VjyRwTx8THBDpfLXJq0sgSXPbnm+f0IoUk0Xmk7cIs981pUOlzsBXNqoiaR9voT/mEpZO40Fw5Qt7Bjb4cdQv1PLQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747175726; c=relaxed/simple; bh=qU8wgCYcidPkedT4Ghc+ekdiZ39WAZboFXQhI0mWcH8=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=S3nKs4T1p0l+lk3cbzcrTV0YZ9VrqgC2jWZoz1B8C1SUF0gpeJGpy/CugJmQy0jLzhG8UgLwLDMJtueos7L1XByad6IHdfLL+jrS7oP9t+ZsFqLCPITii/RteoRIWCDnxLI/7Te117iI/R2lnJo5Q5Z+aOXw3h9JAvyI6ysfVJc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id BDD49C4CEF9; Tue, 13 May 2025 22:35:25 +0000 (UTC) Received: from rostedt by gandalf with local (Exim 4.98.2) (envelope-from ) id 1uEyE3-00000004sab-2Xoa; Tue, 13 May 2025 18:35:51 -0400 Message-ID: <20250513223551.459986355@goodmis.org> User-Agent: quilt/0.68 Date: Tue, 13 May 2025 18:34:38 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, x86@kernel.org Cc: Masami Hiramatsu , Mathieu Desnoyers , Josh Poimboeuf , Peter Zijlstra , Ingo Molnar , Jiri Olsa , Namhyung Kim , Thomas Gleixner , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andrii Nakryiko Subject: [PATCH v9 03/13] unwind_user/x86: Enable frame pointer unwinding on x86 References: <20250513223435.636200356@goodmis.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Josh Poimboeuf Use ARCH_INIT_USER_FP_FRAME to describe how frame pointers are unwound on x86, and enable CONFIG_HAVE_UNWIND_USER_FP accordingly so the unwind_user interfaces can be used. Signed-off-by: Josh Poimboeuf Signed-off-by: Steven Rostedt (Google) --- arch/x86/Kconfig | 1 + arch/x86/include/asm/unwind_user.h | 11 +++++++++++ 2 files changed, 12 insertions(+) create mode 100644 arch/x86/include/asm/unwind_user.h diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 891a69b308cb..456e085263e1 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -301,6 +301,7 @@ config X86 select HAVE_SYSCALL_TRACEPOINTS select HAVE_UACCESS_VALIDATION if HAVE_OBJTOOL select HAVE_UNSTABLE_SCHED_CLOCK + select HAVE_UNWIND_USER_FP if X86_64 select HAVE_USER_RETURN_NOTIFIER select HAVE_GENERIC_VDSO select VDSO_GETRANDOM if X86_64 diff --git a/arch/x86/include/asm/unwind_user.h b/arch/x86/include/asm/unwi= nd_user.h new file mode 100644 index 000000000000..8597857bf896 --- /dev/null +++ b/arch/x86/include/asm/unwind_user.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_UNWIND_USER_H +#define _ASM_X86_UNWIND_USER_H + +#define ARCH_INIT_USER_FP_FRAME \ + .cfa_off =3D (s32)sizeof(long) * 2, \ + .ra_off =3D (s32)sizeof(long) * -1, \ + .fp_off =3D (s32)sizeof(long) * -2, \ + .use_fp =3D true, + +#endif /* _ASM_X86_UNWIND_USER_H */ --=20 2.47.2