From: Timo Juhani Lindfors <timo.lindfors@iki.fi>
To: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Pavel Emelyanov <xemul@parallels.com>,
Jiri Kosina <jkosina@suse.cz>,
Nadia Yvette Chambers <nyc@holomorphy.com>,
yrl.pp-manager.tt@hitachi.com,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH -tip ] [BUGFIX] kprobes: Move hash_64() into .text.kprobe section
Date: Wed, 13 Mar 2013 15:28:29 +0200 [thread overview]
Message-ID: <847glb8m4i.fsf@sauna.l.org> (raw)
In-Reply-To: <514023AA.4070004@hitachi.com> (Masami Hiramatsu's message of "Wed, 13 Mar 2013 15:58:50 +0900")
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> writes:
> OK, then I'll update it to just use __always_inline.
I get a similar case of infinite recursion if I try to kprobe
"inat_get_opcode_attribute":
PID: 3028 TASK: ffff88003c67e8c0 CPU: 1 COMMAND: "insmod"
#0 [ffff88003d60b9b8] __schedule at ffffffff813777f8
#1 [ffff88003d60b9d0] inat_get_opcode_attribute at ffffffff811c95a9
#2 [ffff88003d60b9e0] notifier_call_chain at ffffffff8137b5a3
#3 [ffff88003d60ba20] notify_die at ffffffff8137b60c
#4 [ffff88003d60ba50] do_int3 at ffffffff81378fa0
#5 [ffff88003d60ba70] xen_int3 at ffffffff8137887e
[exception RIP: inat_get_opcode_attribute+1]
RIP: ffffffff811c95a9 RSP: ffff88003d60bb20 RFLAGS: 00000006
RAX: 0000000000000200 RBX: ffffffffa00070f0 RCX: 00000000ffffffff
RDX: ffff88003f80dd90 RSI: ffff88003d60bcc8 RDI: 0000000000000040
RBP: ffffffffa019b000 R8: 0000000000000000 R9: ffffffff81629b10
R10: 00000000000066a8 R11: ffffffffa019b000 R12: ffff88003f80dd90
R13: ffffffff811c95a8 R14: ffffffff811c95a9 R15: ffffffffa019b010
ORIG_RAX: ffffffffffffffff CS: 10000e030 SS: e02b
#6 [ffff88003d60bb20] skip_prefixes at ffffffff81379b6e
#7 [ffff88003d60bb30] set_current_kprobe.isra.4 at ffffffff81379bb0
#8 [ffff88003d60bb40] kprobe_exceptions_notify at ffffffff8137a446
#9 [ffff88003d60bba0] notifier_call_chain at ffffffff8137b5a3
#10 [ffff88003d60bbe0] notify_die at ffffffff8137b60c
#11 [ffff88003d60bc10] do_int3 at ffffffff81378fa0
#12 [ffff88003d60bc30] xen_int3 at ffffffff8137887e
[exception RIP: inat_get_opcode_attribute+1]
RIP: ffffffff811c95a9 RSP: ffff88003d60bce0 RFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff88003d60bdb0 RCX: 0000000000000000
RDX: ffff88003d60be10 RSI: ffff88003d60be10 RDI: 0000000000000040
RBP: 0000000000000000 R8: ffff88003d60bdb0 R9: ffffffff811c95a8
R10: 00000000000066a8 R11: ffffffffa019b000 R12: ffffffff811c9540
R13: ffffffff811c95ad R14: 0000000000000000 R15: ffffffffa019b010
ORIG_RAX: ffffffffffffffff CS: e030 SS: e02b
#13 [ffff88003d60bce0] insn_get_prefixes at ffffffff811c9721
#14 [ffff88003d60bd10] insn_get_opcode at ffffffff811c9923
#15 [ffff88003d60bd30] insn_get_modrm at ffffffff811c9a2e
#16 [ffff88003d60bd50] insn_get_sib at ffffffff811c9af8
#17 [ffff88003d60bd60] insn_get_displacement at ffffffff811c9b5d
#18 [ffff88003d60bd70] insn_get_immediate at ffffffff811c9c48
#19 [ffff88003d60bd80] insn_get_length at ffffffff811c9f97
#20 [ffff88003d60bd90] can_optimize at ffffffff8137a96e
#21 [ffff88003d60be50] arch_prepare_optimized_kprobe at ffffffff8137ab2c
#22 [ffff88003d60bea0] alloc_aggr_kprobe.isra.17 at ffffffff8137bb9b
#23 [ffff88003d60bec0] register_kprobe at ffffffff8137cf16
#24 [ffff88003d60bf00] init_module at ffffffffa001101b [testcase1]
#25 [ffff88003d60bf10] do_one_initcall at ffffffff810020b6
#26 [ffff88003d60bf40] sys_init_module at ffffffff81083c4f
#27 [ffff88003d60bf80] system_call_fastpath at ffffffff8137d6e9
RIP: 00007f0fec23814a RSP: 00007fff29328218 RFLAGS: 00000206
RAX: 00000000000000af RBX: ffffffff8137d6e9 RCX: 00007f0fec23448a
RDX: 00007f0fed0b0010 RSI: 000000000002be0b RDI: 00007f0fec8df000
RBP: 00007f0fed0b11d0 R8: 0000000000000003 R9: 0000000000000000
R10: 00007f0fec23448a R11: 0000000000000206 R12: 00007f0fed0b0010
R13: 00007f0fed0b12a0 R14: 00007f0fed0b00c0 R15: 0000000000000000
ORIG_RAX: 00000000000000af CS: e033 SS: e02b
next prev parent reply other threads:[~2013-03-13 13:28 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-11 14:22 [PATCH -tip ] [BUGFIX] kprobes: Move hash_64() into .text.kprobe section Masami Hiramatsu
2013-03-12 4:35 ` Ananth N Mavinakayanahalli
2013-03-12 8:16 ` Ingo Molnar
2013-03-12 11:03 ` Masami Hiramatsu
2013-03-12 8:21 ` Ingo Molnar
2013-03-12 11:07 ` Masami Hiramatsu
2013-03-12 12:09 ` Ingo Molnar
2013-03-12 16:04 ` Linus Torvalds
2013-03-13 6:58 ` Masami Hiramatsu
2013-03-13 13:28 ` Timo Juhani Lindfors [this message]
2013-03-13 13:46 ` Masami Hiramatsu
2013-03-18 20:57 ` Timo Juhani Lindfors
2013-03-19 2:53 ` Masami Hiramatsu
2013-03-21 11:39 ` Ingo Molnar
2013-03-21 13:23 ` Masami Hiramatsu
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