From patchwork Mon Apr 15 12:49:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 13629916 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 59EE280BFE; Mon, 15 Apr 2024 12:49:38 +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=1713185378; cv=none; b=l7GpKNZFhfAwYH7fXAbWIniMDGUqXG32CocWsAk9ma9a+Cr4ew3WH3R533Hjnt7ozEwhiP+G7FFd8g2NvX6aqU5EHi1mawVP7EC4dru0aghiCCX77GaWcjtonfOn+APLh7KqJgqBjhWprrJCe0h5fAcGo5JP9OwCHVOZW7V7knI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713185378; c=relaxed/simple; bh=Ky/M8O0rm7AMIWcFwVKGUXTVtEFqfb+EU9Ru8C9PH5M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=QVhD/R+9+rWP76G8irexRZFtfqiNYZI5/sScF8lYaUfZxjLgj4ogqND0FQLYE0zooNwFvdWB3sUbWHknrpyCBqJPGGAzHaxEou5g22kD5yyRTqh4BZh/iqwPqGXZ9DyLR0l2SFvBNdvMzICMs2OnzruTAmVivW4bGi8dx7RvSk8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oBVvizSB; 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="oBVvizSB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 003A8C2BD10; Mon, 15 Apr 2024 12:49:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713185378; bh=Ky/M8O0rm7AMIWcFwVKGUXTVtEFqfb+EU9Ru8C9PH5M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oBVvizSBUMGrVT8rY3nQdZzju1MrHmb4eevqf16UecUF5/pf1RXMmrdwDkDSTYTUx 1qRCVatyb3Hw8Njz1qJZlRQ06Ethvv56chp9wZJRS/YWiy36ozgfA7KSz2AN/ExAp8 1TGFQzW5ZjUQ8Bhq5rnxnZkv2mQk86s9csI6XMavAwVYmjCVSDL2lMtHTROfG3uhVR mril2N+slpyyaP5QmPBuEsg0ktfYje3AZs2nC3WvNM/qRxb6VjdXgG+DEQXRidZR/+ I/baYICOCSdBogfAvLhFoNx9jJQbd5HlKP6/JtBr3KsMl515cgEiuWgnRMt5+AKXzI 2oNb8+i9y3EZg== 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 v9 03/36] x86: tracing: Add ftrace_regs definition in the header Date: Mon, 15 Apr 2024 21:49:30 +0900 Message-Id: <171318537073.254850.18255104445724151465.stgit@devnote2> X-Mailer: git-send-email 2.34.1 In-Reply-To: <171318533841.254850.15841395205784342850.stgit@devnote2> References: <171318533841.254850.15841395205784342850.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 cf88cc8cc74d..c88bf47f46da 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; };