From nobody Sun Feb 8 09:10:42 2026 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 82C28C4332F for ; Wed, 8 Nov 2023 14:24:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232734AbjKHOYy (ORCPT ); Wed, 8 Nov 2023 09:24:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232268AbjKHOYv (ORCPT ); Wed, 8 Nov 2023 09:24:51 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0EC11BFA for ; Wed, 8 Nov 2023 06:24:49 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31C90C433C7; Wed, 8 Nov 2023 14:24:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699453489; bh=C7bH1hbWj8YrBfom6n8ilePk5KjymNF9xGwzwSVwNXo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BrtIxDVHCOf0bu7JTKatkcA1ju3b4gZ5Vq2cFTvDyE2hler0OWBAWZiYjwlq/XTFW cOQRUyVfmG0PW8gKTTT+y8ELQduQW2nrpD7ZDyRatTmEMe0n8c87whRGPQQkf4aQmQ soFdmpFj9Udi095GJApvsV4kFZI0j0dFBMK5gD2M9ZaPFqkkUhzskZfCXyFuOk2arW SNodYq316Vv+wsG5ot4CFf7UolCyxFSJcyfYmOQAVb1dQV/GbQNeCak+xYgTIc832o wsPQd8exyei5fNIzk9xPzKv0eWvtirfrrNUe/gQcKIbSPxdMXwACfDpw5MCX9pTkDI B1lMlio7rEaMw== 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: [RFC PATCH v2 02/31] x86: tracing: Add ftrace_regs definition in the header Date: Wed, 8 Nov 2023 23:24:43 +0900 Message-Id: <169945348320.55307.17578137376868880969.stgit@devnote2> X-Mailer: git-send-email 2.34.1 In-Reply-To: <169945345785.55307.5003201137843449313.stgit@devnote2> References: <169945345785.55307.5003201137843449313.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 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..fc60974a1d89 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 and rsp. + * Also orig_ax is used for passing direct trampoline address. + * x86_32 doesn't support ftrace_regs. + */ struct pt_regs regs; };