linux-kernel - Re: Using perf probe with arguments throws a fatal error.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Wed, 25 Aug 2010 12:25:41 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Fr?d?ric Weisbecker <fweisbec@...il.com>,
	2nddept-manager@....hitachi.co.jp, Ingo Molnar <mingo@...e.hu>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Using perf probe with arguments throws a fatal error.

> > 
> > The differences I see when a name is given we refer the name, while in
> > the previous case we refer the register %ip.
> 
> Ah, I remembered that, yeah, perf doesn't support those raw regsiters,
> dereferences, etc.
> Hmm, this should be solved, but not so simple as just removing "%",
> because there are also special variables ($retval, $stack) and
> dereferences(+8(+10(%sp)), etc).
> 
> I think the simplest solution is just setting "argX" name for each
> argument (if user omitted its name) in kprobe-tracer (because
> trace-cmd will face same problem).
> e.g.
>  # echo "p do_fork %ip" > tracing/kprobe_events
> will be translated as below
>  # echo "p do_fork arg1=%ip" > tracing/kprobe_events
> 

Okay, I will follow the same and fix the argX name in uprobe-tracer.

--
Thanks and Regards
Srikar
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/