From nobody Wed Dec 17 00:15:53 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99293C4167B for ; Fri, 8 Dec 2023 10:24:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1573531AbjLHKYs (ORCPT ); Fri, 8 Dec 2023 05:24:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233315AbjLHKYl (ORCPT ); Fri, 8 Dec 2023 05:24:41 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 703EE1735 for ; Fri, 8 Dec 2023 02:24:47 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F860C433B6; Fri, 8 Dec 2023 10:24:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1702031086; bh=dL9JJoim7F8avDTUtPFPrZxdt2I1oZt3h3FTr1Er5xQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y1qtLnmkzVzJGf0osX0F12HxdVVw+NsXi2ETuaEW+Vz/DfKMewGmRL7Fvb2Ri+Fjv ciQRh6HAg2Osg+ZER/FXXcvdgZqoaU7nNFurOKXbs7nXWH9wy9s54C/+NY0gGHD+Be aEir0/6kjg3bry8iScjBIT5Ug9+bI1Jq5Zz2lSpf+bm7pNZswA7dUI1sPmBrQWYvs1 53FaxmB8citwzqOC/gB9fOw9dXAPp6usb07ti03TlfE1Azzq6QJUoAWzTDudPw2vnh 8GFYigF5sX+lLqyIDVNjQCODLbrJ0lUTJfsysbIeOdy8yniMQjPxpMcwsYr9UpTzYZ yYeTcddH76ZpQ== From: "Masami Hiramatsu (Google)" To: Alexei Starovoitov , Steven Rostedt , Florent Revest Cc: linux-trace-kernel@vger.kernel.org, LKML , Martin KaFai Lau , bpf , Sven Schnelle , Alexei Starovoitov , Jiri Olsa , Arnaldo Carvalho de Melo , Daniel Borkmann , Alan Maguire , Mark Rutland , Peter Zijlstra , Thomas Gleixner , Guo Ren Subject: [PATCH v4 02/33] x86: tracing: Add ftrace_regs definition in the header Date: Fri, 8 Dec 2023 19:24:40 +0900 Message-Id: <170203107969.579004.12737392554145840949.stgit@devnote2> X-Mailer: git-send-email 2.34.1 In-Reply-To: <170203105427.579004.8033550792660734570.stgit@devnote2> References: <170203105427.579004.8033550792660734570.stgit@devnote2> User-Agent: StGit/0.19 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Masami Hiramatsu (Google) Add ftrace_regs definition for x86_64 in the ftrace header to clarify what register will be accessible from ftrace_regs. Signed-off-by: Masami Hiramatsu (Google) --- Changes in v3: - Add rip to be saved. Changes in v2: - Newly added. --- arch/x86/include/asm/ftrace.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h index 897cf02c20b1..415cf7a2ec2c 100644 --- a/arch/x86/include/asm/ftrace.h +++ b/arch/x86/include/asm/ftrace.h @@ -36,6 +36,12 @@ static inline unsigned long ftrace_call_adjust(unsigned = long addr) =20 #ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS struct ftrace_regs { + /* + * On the x86_64, the ftrace_regs saves; + * rax, rcx, rdx, rdi, rsi, r8, r9, rbp, rip and rsp. + * Also orig_ax is used for passing direct trampoline address. + * x86_32 doesn't support ftrace_regs. + */ struct pt_regs regs; };