linux-kernel - Detecting kprobes generated code addresses

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Message-ID: <20161222064219.2urtfm426rv3vtqb@treble>
Date:   Thu, 22 Dec 2016 00:42:19 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Detecting kprobes generated code addresses

Hi Masami,

I would like to make __kernel_text_address() be able to detect whether
an address belongs to code which was generated by kprobes.  As far as I
can tell, that information seems to be in the 'pages' lists of
kprobe_insn_slots and kprobe_optinsn_slots.  But they seem to be
protected by mutexes.  Do you know if there's a sleep-free way to access
that information?

-- 
Josh