From patchwork Thu May 23 12:11:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Olsa X-Patchwork-Id: 13671690 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 1314778C8B; Thu, 23 May 2024 12:13:48 +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=1716466428; cv=none; b=JGGEu89J4U5XQQAXZ4UlB7zXFcia3mOjZT7tc0IeVVx+BUN3bx1kQnSaCa7UcMID83yQUV9jtSS8xdXEAO7nWGGKnizYmyeDCcUEVAeENF0fN1bicViGxKAJKqycbpsJeeSstKXPz+akLbaNBkKAoA5jwnAu4DXXFZnGY268uLI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716466428; c=relaxed/simple; bh=MfUbeJoTsjQv1oAgkHcvkP4o8mZqbSse0UJ8mAO3EvU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=E/C860NmTUCQItPBoGrS5zbEUl2SWP4Cv6tBZ8wtXKSZ8dlo1nGGKUMNM6pF4RDV4T2VBeOFpiw61SxImNp0fipkOn6BavmlSzyTCXUSMQm7s2n0o7QlI+44MjUUo98pbkiqEMnV+1HKJaGPNICxk6tBZPdwDI1BQ2xtjGjMfyA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oerBvj3h; 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="oerBvj3h" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC32AC2BD10; Thu, 23 May 2024 12:13:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716466427; bh=MfUbeJoTsjQv1oAgkHcvkP4o8mZqbSse0UJ8mAO3EvU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oerBvj3h3QKjPUtyfXJaHNzzjfYa/N7eUF/3TlAAqIT11+KljwgDP6PsbAMCnM77e nYKcjeINjpVZjePyZHmxLlKIIrAohYv6Rv+apTvTS+qiPZCrSQegaI83EJlzwpot/H O0NqdO1g6da4w3HlAGCj2FUulCiwT44Thax2f27r44DENF8oBkgNXez5PbBCvaT6ni 9hmLZSXExvBnKdrMKsCrFbMjKnQbiCgOzUC6jCRWAsYxUuyYNAmjV0mG3OcjGFn94j yKTHtbkSVNrhiPraDpVWWxMz7AalL7wr7OBwsg4vxRyOQxqwLLyRe/MoJ9S1Vs7+Bq LNgrSWOR2XTJw== From: Jiri Olsa To: Steven Rostedt , Masami Hiramatsu , Oleg Nesterov , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: Alejandro Colomar , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-api@vger.kernel.org, linux-man@vger.kernel.org, x86@kernel.org, bpf@vger.kernel.org, Song Liu , Yonghong Song , John Fastabend , Peter Zijlstra , Thomas Gleixner , "Borislav Petkov (AMD)" , Ingo Molnar , Andy Lutomirski , "Edgecombe, Rick P" , Deepak Gupta Subject: [PATCHv7 9/9] man2: Add uretprobe syscall page Date: Thu, 23 May 2024 14:11:49 +0200 Message-ID: <20240523121149.575616-10-jolsa@kernel.org> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240523121149.575616-1-jolsa@kernel.org> References: <20240523121149.575616-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Adding man page for new uretprobe syscall. Reviewed-by: Alejandro Colomar Signed-off-by: Jiri Olsa --- man/man2/uretprobe.2 | 56 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 man/man2/uretprobe.2 diff --git a/man/man2/uretprobe.2 b/man/man2/uretprobe.2 new file mode 100644 index 000000000000..cf1c2b0d852e --- /dev/null +++ b/man/man2/uretprobe.2 @@ -0,0 +1,56 @@ +.\" Copyright (C) 2024, Jiri Olsa +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.TH uretprobe 2 (date) "Linux man-pages (unreleased)" +.SH NAME +uretprobe \- execute pending return uprobes +.SH SYNOPSIS +.nf +.B int uretprobe(void) +.fi +.SH DESCRIPTION +The +.BR uretprobe () +system call is an alternative to breakpoint instructions for triggering return +uprobe consumers. +.P +Calls to +.BR uretprobe () +system call are only made from the user-space trampoline provided by the kernel. +Calls from any other place result in a +.BR SIGILL . +.SH RETURN VALUE +The +.BR uretprobe () +system call return value is architecture-specific. +.SH ERRORS +.TP +.B SIGILL +The +.BR uretprobe () +system call was called by a user-space program. +.SH VERSIONS +Details of the +.BR uretprobe () +system call behavior vary across systems. +.SH STANDARDS +None. +.SH HISTORY +TBD +.SH NOTES +The +.BR uretprobe () +system call was initially introduced for the x86_64 architecture +where it was shown to be faster than breakpoint traps. +It might be extended to other architectures. +.P +The +.BR uretprobe () +system call exists only to allow the invocation of return uprobe consumers. +It should +.B never +be called directly. +Details of the arguments (if any) passed to +.BR uretprobe () +and the return value are architecture-specific.