From: Jiri Olsa <olsajiri@gmail.com>
To: Alejandro Colomar <alx@kernel.org>
Cc: Jiri Olsa <olsajiri@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Oleg Nesterov <oleg@redhat.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
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 <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
"Borislav Petkov (AMD)" <bp@alien8.de>,
Ingo Molnar <mingo@redhat.com>, Andy Lutomirski <luto@kernel.org>,
"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
Deepak Gupta <debug@rivosinc.com>
Subject: Re: [PATCHv6 9/9] man2: Add uretprobe syscall page
Date: Wed, 22 May 2024 13:52:20 +0200 [thread overview]
Message-ID: <Zk3cdJKGbzwbda2e@krava> (raw)
In-Reply-To: <vqw4ibum2hfnxjkfp7io5ugmwaeok4tynchi3utmzp6xnsmjig@fbjxwmm6u6v3>
On Wed, May 22, 2024 at 12:59:46PM +0200, Alejandro Colomar wrote:
> Hi Jirka,
>
> On Wed, May 22, 2024 at 09:54:58AM GMT, Jiri Olsa wrote:
> > ok, thanks
> >
> > jirka
> >
> >
> > ---
> > diff --git a/man/man2/uretprobe.2 b/man/man2/uretprobe.2
> > new file mode 100644
> > index 000000000000..5b5f340b59b6
> > --- /dev/null
> > +++ b/man/man2/uretprobe.2
> > @@ -0,0 +1,56 @@
> > +.\" Copyright (C) 2024, Jiri Olsa <jolsa@kernel.org>
> > +.\"
> > +.\" 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 user.
>
> Maybe 'a user-space program'?
> Anyway, LGTM. Thanks!
>
> Reviewed-by: Alejandro Colomar <alx@kernel.org>
ok, will change, thanks a lot
jirka
>
> Have a lovely day!
> Alex
>
> > +.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.
>
> --
> <https://www.alejandro-colomar.es/>
next prev parent reply other threads:[~2024-05-22 11:52 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-21 10:48 [PATCHv6 bpf-next 0/9] uprobe: uretprobe speed up Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 1/9] x86/shstk: Make return uprobe work with shadow stack Jiri Olsa
2024-05-21 14:22 ` Oleg Nesterov
2024-05-21 16:54 ` Jiri Olsa
2024-05-30 23:04 ` Edgecombe, Rick P
2024-05-21 10:48 ` [PATCHv6 bpf-next 2/9] uprobe: Wire up uretprobe system call Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 3/9] uprobe: Add uretprobe syscall to speed up return probe Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 4/9] selftests/x86: Add return uprobe shadow stack test Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 5/9] selftests/bpf: Add uretprobe syscall test for regs integrity Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 6/9] selftests/bpf: Add uretprobe syscall test for regs changes Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 7/9] selftests/bpf: Add uretprobe syscall call from user space test Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 8/9] selftests/bpf: Add uretprobe shadow stack test Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 9/9] man2: Add uretprobe syscall page Jiri Olsa
2024-05-21 11:36 ` Alejandro Colomar
2024-05-21 11:48 ` Jiri Olsa
2024-05-21 20:24 ` Jiri Olsa
2024-05-21 20:54 ` Alejandro Colomar
2024-05-22 7:54 ` Jiri Olsa
2024-05-22 10:59 ` Alejandro Colomar
2024-05-22 11:52 ` Jiri Olsa [this message]
2024-05-21 20:49 ` [PATCHv6 bpf-next 0/9] uprobe: uretprobe speed up Deepak Gupta
2024-05-21 20:57 ` Alexei Starovoitov
2024-05-22 8:55 ` Jiri Olsa
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Zk3cdJKGbzwbda2e@krava \
--to=olsajiri@gmail.com \
--cc=alx@kernel.org \
--cc=andrii@kernel.org \
--cc=ast@kernel.org \
--cc=bp@alien8.de \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=debug@rivosinc.com \
--cc=john.fastabend@gmail.com \
--cc=linux-api@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-man@vger.kernel.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mhiramat@kernel.org \
--cc=mingo@redhat.com \
--cc=oleg@redhat.com \
--cc=peterz@infradead.org \
--cc=rick.p.edgecombe@intel.com \
--cc=rostedt@goodmis.org \
--cc=songliubraving@fb.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
--cc=yhs@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).