From nobody Tue Oct 7 21:50:09 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 B60662356B9; Fri, 9 May 2025 16:51:38 +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=1746809498; cv=none; b=jtXmwgwEKmyoTkJOYQy18pBuTTidaeZHeuleWyFDlFOVdTk+eSB+vx6VS9XHdY3/ijbLRrnFBSxy53qC9dufu+wwB0uXOz+VzOaoRNXmeclvmTE5344nYuxoKoPIsQZUm40GPkzl8rcEiz0OeJnWtIQ+CeW8CMkU3fC/igw0Ci4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746809498; c=relaxed/simple; bh=mzbtnjJps06HCLHPOPcqSMIDBIvOi7mfpTIlyoJ7BSc=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=RrC9PLX8wyJOpAArQ2bKLLDwEs9eCTQyGNfDi6bQmW7Qz0YnbVmHjPi4aE/NjU+pWdjDq8czsd6vlWhnyB6r887Pl0SWBRIuCZvdCzpVIRjAs9mev2hwbjnrouFnCc4Ef1F24WKJDvqCFGSfY7zGq7B3S81aPU94uqGEQs41TNY= 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 6BED4C4CEEF; Fri, 9 May 2025 16:51:38 +0000 (UTC) Received: from rostedt by gandalf with local (Exim 4.98.2) (envelope-from ) id 1uDQx0-00000002gEi-17fo; Fri, 09 May 2025 12:51:54 -0400 Message-ID: <20250509165154.126466241@goodmis.org> User-Agent: quilt/0.68 Date: Fri, 09 May 2025 12:45:27 -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 Subject: [PATCH v8 03/18] unwind_user/x86: Enable frame pointer unwinding on x86 References: <20250509164524.448387100@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 4c33c644b92d..a6e529dc4550 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