From patchwork Fri Dec 8 10:24:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 13485208 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 A7F9314F78; Fri, 8 Dec 2023 10:24:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Y1qtLnmk" 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 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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; };