From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Andi Kleen <andi@firstfloor.org>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Sandeepa Prabhu <sandeepa.prabhu@linaro.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
x86@kernel.org, fche@redhat.com, mingo@redhat.com,
systemtap@sourceware.org, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH -tip v8 07/26] [BUGFIX] x86: Prohibit probing on thunk functions and restore
Date: Mon, 24 Mar 2014 12:03:57 +0900 [thread overview]
Message-ID: <532FA09D.1040405@hitachi.com> (raw)
In-Reply-To: <20140321210020.438f6e32@gandalf.local.home>
(2014/03/22 10:00), Steven Rostedt wrote:
> On Wed, 05 Mar 2014 20:59:32 +0900
> Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:
>
>> thunk_ra trace_hardirqs_on_thunk,trace_hardirqs_on_caller
>> diff --git a/arch/x86/lib/thunk_64.S b/arch/x86/lib/thunk_64.S
>> index a63efd6..92d9fea 100644
>> --- a/arch/x86/lib/thunk_64.S
>> +++ b/arch/x86/lib/thunk_64.S
>> @@ -8,6 +8,7 @@
>> #include <linux/linkage.h>
>> #include <asm/dwarf2.h>
>> #include <asm/calling.h>
>> +#include <asm/asm.h>
>>
>> /* rdi: arg1 ... normal C conventions. rax is saved/restored. */
>> .macro THUNK name, func, put_ret_addr_in_rdi=0
>> @@ -25,6 +26,7 @@
>> call \func
>> jmp restore
>> CFI_ENDPROC
>> + _ASM_NOKPROBE(\name)
>> .endm
>>
>> #ifdef CONFIG_TRACE_IRQFLAGS
>> @@ -43,3 +45,4 @@ restore:
>> RESTORE_ARGS
>> ret
>> CFI_ENDPROC
>> + _ASM_NOKPROBE(restore)
>>
>
> Does kallsyms return something for this? I'm curious to what it does.
> It might find something that we didn't expect. Do you have debug code
> to list out all the black listed items found at boot up?
Yes, with [19/26] the blacklisted functions are shown in debugfs
(kprobes/blacklist) :)
Thank you,
--
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com
next prev parent reply other threads:[~2014-03-24 3:04 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-05 11:58 [PATCH -tip v8 00/26] kprobes: introduce NOKPROBE_SYMBOL, bugfixes and scalbility efforts Masami Hiramatsu
2014-03-05 11:58 ` [PATCH -tip v8 01/26] [BUGFIX]kprobes/x86: Fix page-fault handling logic Masami Hiramatsu
2014-03-21 21:39 ` Steven Rostedt
2014-03-24 1:10 ` Masami Hiramatsu
2014-03-05 11:58 ` [PATCH -tip v8 02/26] kprobes/x86: Allow to handle reentered kprobe on singlestepping Masami Hiramatsu
2014-03-21 21:44 ` Steven Rostedt
2014-03-24 10:07 ` Masami Hiramatsu
2014-03-05 11:59 ` [PATCH -tip v8 03/26] kprobes: Prohibit probing on .entry.text code Masami Hiramatsu
2014-03-21 22:04 ` Steven Rostedt
2014-03-24 1:48 ` Masami Hiramatsu
2014-03-24 18:53 ` Steven Rostedt
2014-03-24 18:55 ` Steven Rostedt
2014-03-05 11:59 ` [PATCH -tip v8 04/26] kprobes: Introduce NOKPROBE_SYMBOL() macro for blacklist Masami Hiramatsu
2014-03-22 0:49 ` Steven Rostedt
2014-03-26 7:04 ` Masami Hiramatsu
2014-03-05 11:59 ` [PATCH -tip v8 05/26] [BUGFIX] kprobes/x86: Prohibit probing on debug_stack_* Masami Hiramatsu
2014-03-22 0:50 ` Steven Rostedt
2014-03-05 11:59 ` [PATCH -tip v8 06/26] [BUGFIX] x86: Prohibit probing on native_set_debugreg/load_idt Masami Hiramatsu
2014-03-22 0:53 ` Steven Rostedt
2014-03-05 11:59 ` [PATCH -tip v8 07/26] [BUGFIX] x86: Prohibit probing on thunk functions and restore Masami Hiramatsu
2014-03-22 1:00 ` Steven Rostedt
2014-03-24 3:03 ` Masami Hiramatsu [this message]
2014-03-24 18:56 ` Steven Rostedt
2014-03-05 11:59 ` [PATCH -tip v8 08/26] kprobes/x86: Call exception handlers directly from do_int3/do_debug Masami Hiramatsu
2014-03-22 1:05 ` Steven Rostedt
2014-03-24 8:47 ` Masami Hiramatsu
2014-03-24 18:58 ` Steven Rostedt
2014-03-05 11:59 ` [PATCH -tip v8 09/26] x86: Call exception_enter after kprobes handled Masami Hiramatsu
2014-03-24 19:31 ` Steven Rostedt
2014-03-05 11:59 ` [PATCH -tip v8 10/26] kprobes/x86: Allow probe on some kprobe preparation functions Masami Hiramatsu
2014-03-24 19:35 ` Steven Rostedt
2014-03-25 9:20 ` Masami Hiramatsu
2014-03-27 5:50 ` Masami Hiramatsu
2014-03-05 12:00 ` [PATCH -tip v8 11/26] kprobes: Allow probe on some kprobe functions Masami Hiramatsu
2014-03-24 19:37 ` Steven Rostedt
2014-03-25 9:22 ` Masami Hiramatsu
2014-03-05 12:00 ` [PATCH -tip v8 12/26] ftrace/*probes: Allow probing on some functions Masami Hiramatsu
2014-03-24 19:38 ` Steven Rostedt
2014-03-25 9:30 ` Masami Hiramatsu
2014-03-05 12:00 ` [PATCH -tip v8 13/26] x86: Allow kprobes on text_poke/hw_breakpoint Masami Hiramatsu
2014-03-24 19:40 ` Steven Rostedt
2014-03-05 12:00 ` [PATCH -tip v8 14/26] x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation Masami Hiramatsu
2014-03-24 19:45 ` Steven Rostedt
2014-03-25 10:33 ` Masami Hiramatsu
2014-03-05 12:00 ` [PATCH -tip v8 15/26] kprobes: Use NOKPROBE_SYMBOL macro instead of __kprobes Masami Hiramatsu
2014-03-24 19:46 ` Steven Rostedt
2014-03-05 12:00 ` [PATCH -tip v8 16/26] ftrace/kprobes: Use NOKPROBE_SYMBOL macro in ftrace Masami Hiramatsu
2014-03-24 20:10 ` Steven Rostedt
2014-03-25 10:31 ` Masami Hiramatsu
2014-03-05 12:00 ` [PATCH -tip v8 17/26] notifier: Use NOKPROBE_SYMBOL macro in notifier Masami Hiramatsu
2014-03-24 20:12 ` Steven Rostedt
2014-03-25 10:23 ` Masami Hiramatsu
2014-03-25 10:58 ` Steven Rostedt
2014-03-05 12:00 ` [PATCH -tip v8 18/26] sched: Use NOKPROBE_SYMBOL macro in sched Masami Hiramatsu
2014-03-24 20:14 ` Steven Rostedt
2014-03-05 12:00 ` [PATCH -tip v8 19/26] kprobes: Show blacklist entries via debugfs Masami Hiramatsu
2014-03-24 20:19 ` Steven Rostedt
2014-03-25 10:30 ` Masami Hiramatsu
2014-03-05 12:01 ` [PATCH -tip v8 20/26] kprobes: Support blacklist functions in module Masami Hiramatsu
2014-03-05 12:01 ` [PATCH -tip v8 21/26] kprobes: Use NOKPROBE_SYMBOL() in sample modules Masami Hiramatsu
2014-03-05 12:01 ` [PATCH -tip v8 22/26] kprobes/x86: Use kprobe_blacklist for .kprobes.text and .entry.text Masami Hiramatsu
2014-03-05 12:01 ` [PATCH -tip v8 23/26] kprobes/x86: Remove unneeded preempt_disable/enable in interrupt handlers Masami Hiramatsu
2014-03-05 12:01 ` [PATCH -tip v8 24/26] kprobes: Enlarge hash table to 512 entries Masami Hiramatsu
2014-03-05 12:01 ` [PATCH -tip v8 25/26] kprobes: Introduce kprobe cache to reduce cache misshits Masami Hiramatsu
2014-03-05 12:01 ` [PATCH -tip v8 26/26] ftrace: Introduce FTRACE_OPS_FL_SELF_FILTER for ftrace-kprobe Masami Hiramatsu
2014-03-14 13:11 ` [PATCH -tip v8 00/26] kprobes: introduce NOKPROBE_SYMBOL, bugfixes and scalbility efforts Masami Hiramatsu
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