Re: [PATCHv4 7/7] man2: Add uretprobe syscall page

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On Thu, May 02, 2024 at 03:43:27PM +0200, Alejandro Colomar wrote:
> Hi Jiri,
> 
> On Thu, May 02, 2024 at 02:23:13PM +0200, Jiri Olsa wrote:
> > Adding man page for new uretprobe syscall.
> > 
> > Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
> > ---
> >  man2/uretprobe.2 | 45 +++++++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 45 insertions(+)
> >  create mode 100644 man2/uretprobe.2
> > 
> > diff --git a/man2/uretprobe.2 b/man2/uretprobe.2
> > new file mode 100644
> > index 000000000000..08fe6a670430
> > --- /dev/null
> > +++ b/man2/uretprobe.2
> > @@ -0,0 +1,45 @@
> > +.\" Copyright (C) 2024, Jiri Olsa <jolsa@xxxxxxxxxx>
> > +.\"
> > +.\" 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
> > +Kernel is using
> > +.BR uretprobe()
> > +syscall to trigger uprobe return probe consumers instead of using
> > +standard breakpoint instruction.
> > +
> 
> Please use .P instead of a blank.  See man-pages(7):
> 
>    Formatting conventions (general)
>      Paragraphs should be separated by suitable markers (usually either
>      .P or .IP).  Do not separate paragraphs using blank lines, as this
>      results in poor rendering in some output formats  (such  as  Post‐
>      Script and PDF).

ok, will do

> 
> > +The uretprobe syscall is not supposed to be called directly by user, it's allowed
> 
> s/by user/by the user/

ok

> 
> > +to be invoked only through user space trampoline provided by kernel.
> 
> s/user space/user-space/

ok

> 
> Missing a few 'the' too, here and in the rest of the page.

ok, will check

> 
> > +When called from outside of this trampoline, the calling process will receive
> > +.BR SIGILL .
> > +
> > +.SH RETURN VALUE
> > +.BR uretprobe()
> 
> You're missing a space here:
> 
> .BR uretprobe ()

ok

> 
> > +return value is specific for given architecture.
> > +
> > +.SH VERSIONS
> > +This syscall is not specified in POSIX,
> > +and details of its behavior vary across systems.
> > +.SH STANDARDS
> > +None.
> 
> You could add a HISTORY section.

ok, IIUC for this syscall it should contain just kernel version where
it got merged, right?

> 
> Have a lovely day!

thanks for review,
jirka




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