linux-kernel - Re: [PATCH V4 03/13] kprobes: Add symbols for kprobe insn pages

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Date:   Thu, 5 Mar 2020 18:04:02 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>, X86 ML <x86@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V4 03/13] kprobes: Add symbols for kprobe insn pages

On Wed, 4 Mar 2020 22:10:10 -0800
Alexei Starovoitov <alexei.starovoitov@...il.com> wrote:

> On Wed, Mar 4, 2020 at 10:01 PM Masami Hiramatsu <mhiramat@...nel.org> wrote:
> > >
> > >       # perf probe __schedule
> > >       Added new event:
> > >         probe:__schedule     (on __schedule)
> > >       # cat /proc/kallsyms | grep '\[__builtin__kprobes\]'
> > >       ffffffffc00d4000 t kprobe_insn_page     [__builtin__kprobes]
> > >       ffffffffc00d6000 t kprobe_optinsn_page  [__builtin__kprobes]
> > >
> > > Note: This patch adds "__builtin__kprobes" as a module name in
> > > /proc/kallsyms for symbols for pages allocated for kprobes' purposes, even
> > > though "__builtin__kprobes" is not a module.
> >
> > Looks good to me.
> >
> > Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
> >
> > BTW, would you also make a patch to change [bpf] to [__builtin__bpf]?
> 
> Please do not.
> There is nothing 'builtin' about bpf.

Hmm, so, would we reject bpf.ko to be loaded ?

Thank you,

-- 
Masami Hiramatsu <mhiramat@...nel.org>