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[2604:1380:4601:e00::3]) by mx.google.com with ESMTPS id gf6-20020a170906e20600b00a232836690csi2041287ejb.887.2023.12.18.05.22.03 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Dec 2023 05:22:03 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-3705-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=Wv7hkwnN; spf=pass (google.com: domain of linux-kernel+bounces-3705-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-3705-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id 5BB091F24B8F for ; Mon, 18 Dec 2023 13:15:38 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 0C6A342392; Mon, 18 Dec 2023 13:12:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Wv7hkwnN" X-Original-To: linux-kernel@vger.kernel.org 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 6C82242377; Mon, 18 Dec 2023 13:12:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32AFCC433C7; Mon, 18 Dec 2023 13:11:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1702905122; bh=dL9JJoim7F8avDTUtPFPrZxdt2I1oZt3h3FTr1Er5xQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wv7hkwnNl3tILFI8jue5j9YrMdF3Z1ysJuAYY8ULBNMZcy1PgaTZ1maJGQT9rL3Kg CJ+ntPlzHKj8cEA3wSrKhYPOrjvNJy+Zd5QP9LIoHZymR2kJkbaBoabP8nJXGaPKcA CX4dIdSsvp7JjvVKFZTTshYEVNrg61IYwxzBGR7lZLGcgoszkep8nosW7ON2l5y0wO ntN37XdyiUkCusK+gD6W1QLixmj08tumlT0D16cNqJIZHE0148alFuGWyJFF1Z+ePN Geuyopvv0NHP6L8MfnnNJpcOKgRJz/oK6eQcj1UZHHPmUVj408dR9HP1+XeK7AXOzA +xG38PbrPxX/g== 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 v5 02/34] x86: tracing: Add ftrace_regs definition in the header Date: Mon, 18 Dec 2023 22:11:56 +0900 Message-Id: <170290511615.220107.15482324998645275244.stgit@devnote2> X-Mailer: git-send-email 2.34.1 In-Reply-To: <170290509018.220107.1347127510564358608.stgit@devnote2> References: <170290509018.220107.1347127510564358608.stgit@devnote2> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit 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) #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; };