From: Oleg Nesterov <oleg@redhat.com>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Steven Rostedt <rostedt@goodmis.org>,
Namhyung Kim <namhyung.kim@lge.com>,
Hyeoncheol Lee <cheol.lee@lge.com>,
Hemant Kumar <hkshaw@linux.vnet.ibm.com>,
LKML <linux-kernel@vger.kernel.org>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
"zhangwei(Jovi)" <jovi.zhangwei@huawei.com>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Subject: Re: [PATCHSET 00/13] tracing/uprobes: Add support for more fetch methods (v6)
Date: Tue, 12 Nov 2013 19:44:12 +0100 [thread overview]
Message-ID: <20131112184412.GA2492@redhat.com> (raw)
In-Reply-To: <87siv2uk1q.fsf@sejong.aot.lge.com>
Hi Namhyung,
On 11/12, Namhyung Kim wrote:
>
> Let me clarify what I understand.
>
> For @addr syntax: kernel does no translation and uses given address
Yes,
> For @+addr syntax: user-space uses relative symbol address from a loaded
> base address and kernel calculates the base address
> using "current->utask->vaddr - tu->offset".
Looks right to me.
IOW, when user-space calculates the "addr" for @+ argument, it should
assume that this binary will be mmaped at "NULL" (so that the virtual
address of the probed function is always equal to its offset in the
probed binary).
Masami, Steven, et al, do you agree?
Oleg.
next prev parent reply other threads:[~2013-11-12 18:43 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-29 6:53 [PATCHSET 00/13] tracing/uprobes: Add support for more fetch methods (v6) Namhyung Kim
2013-10-29 6:53 ` [PATCH 01/13] tracing/uprobes: Fix documentation of uprobe registration syntax Namhyung Kim
2013-10-29 6:53 ` [PATCH 02/13] tracing/probes: Fix basic print type functions Namhyung Kim
2013-10-29 6:53 ` [PATCH 03/13] tracing/kprobes: Move fetch functions to trace_kprobe.c Namhyung Kim
2013-10-29 6:53 ` [PATCH 04/13] tracing/kprobes: Add fetch{,_size} member into deref fetch method Namhyung Kim
2013-10-29 6:53 ` [PATCH 05/13] tracing/kprobes: Staticize stack and memory fetch functions Namhyung Kim
2013-10-29 6:53 ` [PATCH 06/13] tracing/kprobes: Factor out struct trace_probe Namhyung Kim
2013-10-29 6:53 ` [PATCH 07/13] tracing/uprobes: Convert to " Namhyung Kim
2013-10-29 6:53 ` [PATCH 08/13] tracing/kprobes: Move common functions to trace_probe.h Namhyung Kim
2013-10-29 6:53 ` [PATCH 09/13] tracing/kprobes: Integrate duplicate set_print_fmt() Namhyung Kim
2013-10-29 6:53 ` [PATCH 10/13] tracing/uprobes: Fetch args before reserving a ring buffer Namhyung Kim
2013-10-31 18:16 ` Oleg Nesterov
2013-11-01 9:00 ` Namhyung Kim
2013-11-04 8:06 ` Namhyung Kim
2013-11-04 14:35 ` Oleg Nesterov
2013-11-05 1:12 ` Namhyung Kim
2013-11-01 15:09 ` Oleg Nesterov
2013-11-01 15:22 ` Oleg Nesterov
2013-11-03 20:20 ` Oleg Nesterov
2013-11-04 8:11 ` Namhyung Kim
2013-11-04 14:38 ` Oleg Nesterov
2013-11-05 1:17 ` Namhyung Kim
2013-10-29 6:53 ` [PATCH 11/13] tracing/kprobes: Add priv argument to fetch functions Namhyung Kim
2013-11-04 16:09 ` Oleg Nesterov
2013-11-05 2:10 ` Namhyung Kim
2013-10-29 6:53 ` [PATCH 12/13] tracing/uprobes: Add more " Namhyung Kim
2013-10-31 18:22 ` Oleg Nesterov
2013-11-04 8:50 ` Namhyung Kim
2013-11-04 16:44 ` Oleg Nesterov
2013-11-04 17:17 ` Steven Rostedt
2013-11-05 2:19 ` Namhyung Kim
2013-11-05 2:17 ` Namhyung Kim
2013-11-01 17:53 ` Oleg Nesterov
2013-10-29 6:53 ` [PATCH 13/13] tracing/uprobes: Add support for full argument access methods Namhyung Kim
2013-10-30 10:36 ` [PATCHSET 00/13] tracing/uprobes: Add support for more fetch methods (v6) Masami Hiramatsu
2013-11-02 15:54 ` Oleg Nesterov
2013-11-04 8:46 ` Namhyung Kim
2013-11-04 8:59 ` Namhyung Kim
2013-11-04 15:51 ` Oleg Nesterov
2013-11-04 16:22 ` Oleg Nesterov
2013-11-04 18:47 ` Oleg Nesterov
2013-11-04 18:57 ` Oleg Nesterov
2013-11-05 2:51 ` Namhyung Kim
2013-11-05 16:41 ` Oleg Nesterov
2013-11-06 8:37 ` Namhyung Kim
2013-11-05 2:49 ` Namhyung Kim
2013-11-05 6:58 ` Namhyung Kim
2013-11-05 17:45 ` Oleg Nesterov
2013-11-05 19:24 ` Oleg Nesterov
2013-11-06 8:57 ` Namhyung Kim
2013-11-06 17:37 ` Oleg Nesterov
2013-11-06 18:24 ` Oleg Nesterov
2013-11-07 9:00 ` Namhyung Kim
2013-11-08 17:00 ` Oleg Nesterov
2013-11-12 7:49 ` Namhyung Kim
2013-11-07 8:48 ` Namhyung Kim
2013-11-09 3:18 ` Masami Hiramatsu
2013-11-09 15:23 ` Oleg Nesterov
2013-11-12 8:00 ` Namhyung Kim
2013-11-12 18:44 ` Oleg Nesterov [this message]
2013-11-25 6:59 ` Namhyung Kim
2013-11-25 14:12 ` [PATCH] uprobes: Allocate ->utask before handler_chain() for tracing handlers Oleg Nesterov
2013-11-06 8:48 ` [PATCHSET 00/13] tracing/uprobes: Add support for more fetch methods (v6) Namhyung Kim
2013-11-06 16:28 ` Oleg Nesterov
2013-11-07 7:33 ` Namhyung Kim
2013-11-08 16:52 ` Oleg Nesterov
2013-11-05 2:15 ` Namhyung Kim
2013-11-05 16:33 ` Oleg Nesterov
2013-11-06 8:34 ` Namhyung Kim
2013-11-05 1:59 ` Namhyung Kim
2013-11-04 15:01 ` Oleg Nesterov
2013-11-05 1:53 ` Namhyung Kim
2013-11-05 16:28 ` Oleg Nesterov
2013-11-06 8:31 ` Namhyung Kim
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