From nobody Thu Sep 11 22:42:59 2025 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 36FDC275AEB; Wed, 20 Aug 2025 19:06:36 +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=1755716797; cv=none; b=kyklt4bDfknCcz3xJD5iio2wSDpQUFvmAkS0SIiJYBbr5Or18yFm18rzPZuVOTOD3/qVCjpntlMkeJ11Dacyk5u2HlNHjbO6IDiGnHo4dTUIf/7YXWYV+PjnE9rf+61FbJb1ZjdafaTanwA3RikrEc+O9clQEztNdMhMYPzWgoM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755716797; c=relaxed/simple; bh=nLJGoGeuqPkpzEuh03+jK8eWmMrjjG2N95dLqjOBEos=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=j1oDQywVD6M7YGN07hWlPuidNrOregqH98dbCqc7Xz5z9RJpidEDE6tJTl4tPGfB+FiPI3lYd50nw9Ck17KYKpxfZvmJdLqAmU3l9aIF1fyDoI11a/FUD622+vAHqa3i6qIKBwlEPeYE7+XjiXncTxn+OyIjDdO8lB+Y5eJA+VQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OZrXLEd7; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OZrXLEd7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C965FC113D0; Wed, 20 Aug 2025 19:06:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755716796; bh=nLJGoGeuqPkpzEuh03+jK8eWmMrjjG2N95dLqjOBEos=; h=Date:From:To:Cc:Subject:References:From; b=OZrXLEd7XzCFcqMBGb928PUq3hxO2MjCNNOFVsd667EUAwcxddJcIUQqS+VIF6VlI wYo+ooA8movVa2KF1TglArkFLnD3F0Sl0c63KsJmhsrGzhChi96IrDTyKAQ9qSbsVE 6bWCff1u6v2eHvCWOiwfBK4KQxpg2ghZsHDNYxionrdq5chrHAhz+gcr7/UXbmA7LF j4F7BZbnQOihcwLd8FWf+6YIjB/FgChypDohUCE9pO4roXKZ3maQc4zwtbjs2CyuBy jFYPeY8Mj+eOyeP1bmmfEz79VISFsej6VVt1ULY3OCzRCpD5ql0/xaVVxtVT9sy1ZK HC8qaXYK9njAA== Received: from rostedt by gandalf with local (Exim 4.98.2) (envelope-from ) id 1uoo8t-00000000tEv-3SFu; Wed, 20 Aug 2025 15:06:39 -0400 Message-ID: <20250820190639.676050639@kernel.org> User-Agent: quilt/0.68 Date: Wed, 20 Aug 2025 15:05:47 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, x86@kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Peter Zijlstra , Linus Torvalds , Josh Poimboeuf Subject: [PATCH 1/2] unwind_user/x86: Enable frame pointer unwinding on x86 References: <20250820190546.172023727@kernel.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 58d890fe2100..8f94c58d4de8 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -299,6 +299,7 @@ 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 2.50.1