From patchwork Tue May 7 14:08:35 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: 13657118 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 4E5C815E7E4; Tue, 7 May 2024 14:08:41 +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=1715090922; cv=none; b=YwU17p4YSbMwZtO5jJk5u50cDrlsdf1kqhPrqF9rCpm+uKHKVbY0HIN+i9ae/VmjYa8I8b9KfpigQF4+6lma/6aq+fb/V35HAgQ4ZMOOrbZinoRv+9jhmNkmhHS6EXQTVbVow3MkAInOyqsm0PXO0YqpXM0jYbeg3vrs1fKrYz0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715090922; c=relaxed/simple; bh=Ky/M8O0rm7AMIWcFwVKGUXTVtEFqfb+EU9Ru8C9PH5M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=C/gZWeF2RU/Qht2fqKGmlFc5lGKbJUJYKbgvyjfuhDb/pK2g5lWqrmesLl3TtGTn9VkA4CB21Zv3giBfvBinuhr0U+6OygwyMh4b/53qNeMsOVdQRW5NLX1QZLi+andvlNO8HcFWHqLNdeM6kFeTgfhqwuzoKf24NyDTOzOz2IY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=r8fa7Bpi; 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="r8fa7Bpi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC44AC2BBFC; Tue, 7 May 2024 14:08:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715090921; bh=Ky/M8O0rm7AMIWcFwVKGUXTVtEFqfb+EU9Ru8C9PH5M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r8fa7Bpi8DFcRIYppDjwBdtP3uubc/ubqGgttVwMlr0tesTk4xAWTIP7llsMiu39f X1bxjEkVdKBEIydeNPtztv9Bk1fxvSF01hlphsOnIHzI3KuK6unuw3yMlhmrqmtAd1 Jx/zVRQqR5qeg3aJDgmSgND+CdVUocjQxzjDJS3P3xAxN758ycI4Ws46oN0Y3GeQkI DX9Tsh/VpH3HhoJC9oAn1uvSxDGA21znK8NVfVekWpmK1CvJtyB+KOkZ5/AneWfI/U plydzSjAN8f+6DI30K2P9dbJQau/OFTPpuo3c8ph/1eGHZ4Fjyc+0ZuX/cDxSOCpWK yOIh278bExT5A== 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 v10 03/36] x86: tracing: Add ftrace_regs definition in the header Date: Tue, 7 May 2024 23:08:35 +0900 Message-Id: <171509091569.162236.17928081833857878443.stgit@devnote2> X-Mailer: git-send-email 2.34.1 In-Reply-To: <171509088006.162236.7227326999861366050.stgit@devnote2> References: <171509088006.162236.7227326999861366050.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; };