From mboxrd@z Thu Jan 1 00:00:00 1970 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 38B85212546; Wed, 27 Aug 2025 19:38:09 +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=1756323490; cv=none; b=Ic3O3DH9qDrcggip4W7d+Jg2huUmXhPujUy60FsVgzrv4puEKU1MRdibO25a0AkvvXpM8mk8QWtiHBH6uDBQPZz4G/zTpKkK+p7ghXg2iXGYcxnlVTNWPuDp/Wo2OEok64wjmTrNCiH10hP56Lvqh7g95PP9sHqtRH3YXk9UlZY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756323490; c=relaxed/simple; bh=nLJGoGeuqPkpzEuh03+jK8eWmMrjjG2N95dLqjOBEos=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=udrT2jQOd8B+OsNQVqbds5zdK8gVherseB6d0Ho671OQ6cc/jA/YarZiZPNgUmwa9laExexSxoZk7Nc+a1YPu9q6hDuQDlcv9WG7tEG7kSH2NJdD+bl627QifLNvXmY2z4HMOSgraOUTAQQwdOOxIEyxGtN2ut+ppQm4Pj/kD3E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=h8kFIKaw; 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="h8kFIKaw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BBD1AC4CEF4; Wed, 27 Aug 2025 19:38:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756323489; bh=nLJGoGeuqPkpzEuh03+jK8eWmMrjjG2N95dLqjOBEos=; h=Date:From:To:Cc:Subject:References:From; b=h8kFIKawVBefXiWwzK9U0GbpGATeURNrmRnjKY35827ph1AG5BoEtOyXyBej0rean EWslgMF+3HLPR52ud7P67taYAMrjSVKZfjYYvLNeGxet25/w1IYW4wzKi6cMkQCMpV MZBjW//eFdcS17k5j4r7G1Fj9/vQiErnSuIW8/KAyJcNnKhUz/tqJG/8ZJQlvy7Spq ZfNpJVmM7wHRJQWXKlVQzl7vQlf5G+UQqJEYev9KFgmyp9xPWgvgTEitiyG78sftFh iKGKaV9rFwsMC7t5SwnqnBa6ProY42HiuaDSjs8IQPCr9NuAahopAd6yP58xlvi05b BRc6Wm3jQW9jw== Received: from rostedt by gandalf with local (Exim 4.98.2) (envelope-from ) id 1urLyW-00000003jGq-24ik; Wed, 27 Aug 2025 15:38:28 -0400 Message-ID: <20250827193828.347397433@kernel.org> User-Agent: quilt/0.68 Date: Wed, 27 Aug 2025 15:36:45 -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 v2 1/2] unwind_user/x86: Enable frame pointer unwinding on x86 References: <20250827193644.527334838@kernel.org> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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/unwind_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 = (s32)sizeof(long) * 2, \ + .ra_off = (s32)sizeof(long) * -1, \ + .fp_off = (s32)sizeof(long) * -2, \ + .use_fp = true, + +#endif /* _ASM_X86_UNWIND_USER_H */ -- 2.50.1