linux-kernel - Re: [PATCH 2/2] kprobe: fix: Add ftrace_ops_assist

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Date:   Fri, 16 Mar 2018 15:02:26 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:     Francis Deslauriers <francis.deslauriers@...icios.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 2/2] kprobe: fix: Add ftrace_ops_assist_func to kprobe
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On Fri, 16 Mar 2018 13:53:01 -0400 (EDT)
Mathieu Desnoyers <mathieu.desnoyers@...icios.com> wrote:

> Would the general approach you envision be based on emitting all code
> generated by compilation of all objects under kernel/tracing and
> kernel/events into a specific "nokprobes" text section of the kernel ?
> Perhaps we could create a specific linker scripts for those directories,
> or do you have in mind a neater way to do this ?

I was thinking of adding it to the objtool work. I need to consolidate
the recordmcount code and objtool for doing this, and that is on my
agenda (it has to do with some of the current "urgent" needs).

But this will take a bit of effort. In the mean time and not against
just adding the whack-a-mole approach and add the functions that the
original patch selected as nokprobes.

-- Steve