From mboxrd@z Thu Jan 1 00:00:00 1970 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 DACB614EC4D; Tue, 7 May 2024 10:55:10 +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=1715079311; cv=none; b=LEWrJFxryrFgoBk5uuz9u9kYZ2UP2Hrtarq41rBBB2w8Sr8uQ5FZVqwj5/YEuxnZKtDADH3sKgQFEvXiVpELU/ESKwrsfYXSYnC/3UbgVTVVNmUBE+tl6j35ToiVUyFXwuOTw4zlbYhCS+volqSv3MMjgsHrrGo48iF3P/3SJV8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715079311; c=relaxed/simple; bh=YOJAMtCe8DK1ux8SakApe84VXlSr5Oi60Hn13JG7aeE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=T9Y/3K7NCPy39adYdVnaXRj+YNfLv2iGfwqLXxRHCfDkRTcuyC9xwYoffLiAZ3cPjmiKvkmTQ/JI81wkcAQXTy/H7kkagcV9di6W+oO8QAN+zhm6dl9SQeacjfKmFN8HESzBc7dIh5LVP7/FE+MnhEiem1UdGbYNK/4oatGSTc8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hXgJTo8F; 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="hXgJTo8F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 591AFC2BBFC; Tue, 7 May 2024 10:55:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715079310; bh=YOJAMtCe8DK1ux8SakApe84VXlSr5Oi60Hn13JG7aeE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hXgJTo8FdTyeyQiASmgfgUOm4EvxnCORiGM3pHBT6jFPxPh4c+niH0HnaiEWp/GX0 COlf5kA99GDqMrGwcLIAaKkvH1uV83qJXgnGCgbt71t4+0yuW8s6tVVONfHoyFsegP 7b2Zgx2YdZ44jAR3CEdeXmv4NYClE7EwBRENHZ38gGNWfx9HZvxqz9FsIxEXS1blmr lq8/c59Zr7V7wTNhBVux/kUpX0oWOP9rR3NeikvGVyWkaULiYzyC4nj8r0CgW5b+Mq hbh2XuVnqwxR5UwwD8jlAdq2ExY8fZT//hBNjUYt4zGNAAScXcVemskf4Ic+WMdVv2 By8lQWXPsEWEA== From: Jiri Olsa To: Steven Rostedt , Masami Hiramatsu , Oleg Nesterov , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: 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: [PATCHv5 8/8] man2: Add uretprobe syscall page Date: Tue, 7 May 2024 12:53:21 +0200 Message-ID: <20240507105321.71524-9-jolsa@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240507105321.71524-1-jolsa@kernel.org> References: <20240507105321.71524-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: linux-api@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Adding man page for new uretprobe syscall. Signed-off-by: Jiri Olsa --- man2/uretprobe.2 | 50 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 man2/uretprobe.2 diff --git a/man2/uretprobe.2 b/man2/uretprobe.2 new file mode 100644 index 000000000000..690fe3b1a44f --- /dev/null +++ b/man2/uretprobe.2 @@ -0,0 +1,50 @@ +.\" 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 () +syscall is an alternative to breakpoint instructions for +triggering return uprobe consumers. +.P +Calls to +.BR uretprobe () +suscall 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 () +syscall return value is architecture-specific. + +.SH VERSIONS +This syscall is not specified in POSIX, +and details of its behavior vary across systems. +.SH STANDARDS +None. +.SH HISTORY +TBD +.SH NOTES +The +.BR uretprobe () +syscall 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 () +syscall 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. -- 2.44.0