From patchwork Sun Feb 25 15:15:36 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: 13570846 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 C31A4125C1; Sun, 25 Feb 2024 15:15:42 +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=1708874142; cv=none; b=OnYkCx+keY4NbqRSCu18JEtjqQGkctgeiSkQta5WH1z2AQBCAMo2wJNVMPcCagLpYDyR/EfR/9N6PQENZzijxXpz9N/faLKnu/GF+FQjzjeklVP1yoTVMYzzWk6hzk3fiXiKsgGCW37wZNWJs2DlFV3AtFlsErsmvCXiM+48CFg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708874142; c=relaxed/simple; bh=Ky/M8O0rm7AMIWcFwVKGUXTVtEFqfb+EU9Ru8C9PH5M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=YILBoB4mWCkFXY7IvmIXXuHW4C41r0z0x8k7K9JN/50QXvPZ+71JuTrQy1OwLkuXct/8EkgXKIYLpcI85S0YZGFie3hGu/rNee3lDUe+M9gC2uIMUlUXWFvjjzi+g5e9pC7EdVI4ViVxwMqDR49CwGhkARAtys+OpcJCHf30muo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jF7Fcv6G; 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="jF7Fcv6G" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50304C433C7; Sun, 25 Feb 2024 15:15:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708874142; bh=Ky/M8O0rm7AMIWcFwVKGUXTVtEFqfb+EU9Ru8C9PH5M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jF7Fcv6G9W2IrXgKAhiYtOiW+5ZqB3//sKd6o5EWirPLh5pfm4ioRvvnOLWc0FZB6 Rtx0yb2fvCwDpqbIUb/3h5lP6iuWyvPSuTHyzEE7+MmEwmA2Tuld53DXVclis3quPE GBouLw1KuA7bl/YSH5+jzAOaETgTacBwLou1/eEgSkduIXLF4t1YfHHGmIgTEZUozX GjjMq2HVgggFPloaTU7SqIXxYDpiAoKnE6UJ33Fnocc5zt2Yo2w4jbVfqYzfhKr7ID 9Kg15C7LyxWTZTjsGH5/ogHafBvBswCDAQyUfpjktgTLNeLMDUDzOK0CH/2OQEx714 W1y8iECtrZ69w== 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 v8 03/35] x86: tracing: Add ftrace_regs definition in the header Date: Mon, 26 Feb 2024 00:15:36 +0900 Message-Id: <170887413645.564249.15526252585297594575.stgit@devnote2> X-Mailer: git-send-email 2.34.1 In-Reply-To: <170887410337.564249.6360118840946697039.stgit@devnote2> References: <170887410337.564249.6360118840946697039.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; };