From: james.morse@arm.com (James Morse)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v12 00/10] arm64: Add kernel probes (kprobes) support
Date: Wed, 11 May 2016 16:33:06 +0100 [thread overview]
Message-ID: <573350B2.4010701@arm.com> (raw)
In-Reply-To: <1461783185-9056-1-git-send-email-dave.long@linaro.org>
Hi David,
On 27/04/16 19:52, David Long wrote:
> From: "David A. Long" <dave.long@linaro.org>
>
> This patchset is heavily based on Sandeepa Prabhu's ARM v8 kprobes patches,
> first seen in October 2013. This version attempts to address concerns raised by
> reviewers and also fixes problems discovered during testing.
>
> This patchset adds support for kernel probes(kprobes), jump probes(jprobes)
> and return probes(kretprobes) support for ARM64.
>
> The kprobes mechanism makes use of software breakpoint and single stepping
> support available in the ARM v8 kernel.
I applied this series on v4.6-rc7, and built the sample kprobes. They work fine,
unless I throw ftrace into the mix too.
I enabled the function_graph tracer, then tried to load the jprobe example module:
-------------------------%<-------------------------
root at ubuntu:/sys/kernel/debug/tracing# insmod /root/jprobe_example.ko
Planted jprobe at ffffff80080c8f20, handler addr ffffff8000bb3000
root at ubuntu:/sys/kernel/debug/tracing# jprobe: clone_flags = 0x1200011, stack_st
art = 0x0 stack_size = 0x0
Bad mode in Synchronous Abort handler detected, code 0x86000005 -- IABT (current
EL)
CPU: 5 PID: 1047 Comm: systemd-udevd Not tainted 4.6.0-rc7+ #4064
Hardware name: ARM Juno development board (r1) (DT)
task: ffffffc975948300 ti: ffffffc974e4c000 task.ti: ffffffc974e4c000
PC is at 0x0
LR is@0x0
pc : [<0000000000000000>] lr : [<0000000000000000>] pstate: 60000145
sp : ffffffc974e4ff00
x29: 0000000001200011 x28: ffffffc974e4c000
x27: ffffff80088d0000 x26: 00000000000000dc
x25: 0000000000000120 x24: 0000000000000015
x23: 0000000060000000 x22: 0000007fa1b40e60
x21: 0000007fa1ce70d0 x20: 0000000000000000
x19: 0000000000000000 x18: 0000000000000a03
x17: 0000007fa1b40d90 x16: ffffff80080c9708
x15: 003b9aca00000000 x14: 0000007fddb7e5c0
x13: 0000007fa1b40e2c x12: 0000000000d00ff0
x11: ffffff8009c4d000 x10: ffffff800920c000
x9 : ffffff8008f5c000 x8 : ffffffc976c06800
x7 : 000000000006daf2 x6 : 0000000000000015
x5 : 0000000000000004 x4 : ffffffc96e8690a0
x3 : 0000001ed7cbab74 x2 : ffffffc96e869000
x1 : 0000000000000000 x0 : 0000000000000000
Internal error: Oops - bad mode: 0 [#1] PREEMPT SMP
Modules linked in: jprobe_example
CPU: 5 PID: 1047 Comm: systemd-udevd Not tainted 4.6.0-rc7+ #4064
Hardware name: ARM Juno development board (r1) (DT)
task: ffffffc975948300 ti: ffffffc974e4c000 task.ti: ffffffc974e4c000
PC is at 0x0
LR is at 0x0
pc : [<0000000000000000>] lr : [<0000000000000000>] pstate: 60000145
sp : ffffffc974e4ff00
x29: 0000000001200011 x28: ffffffc974e4c000
x27: ffffff80088d0000 x26: 00000000000000dc
x25: 0000000000000120 x24: 0000000000000015
x23: 0000000060000000 x22: 0000007fa1b40e60
x21: 0000007fa1ce70d0 x20: 0000000000000000
x19: 0000000000000000 x18: 0000000000000a03
x17: 0000007fa1b40d90 x16: ffffff80080c9708
x15: 003b9aca00000000 x14: 0000007fddb7e5c0
x13: 0000007fa1b40e2c x12: 0000000000d00ff0
x11: ffffff8009c4d000 x10: ffffff800920c000
x9 : ffffff8008f5c000 x8 : ffffffc976c06800
x7 : 000000000006daf2 x6 : 0000000000000015
x5 : 0000000000000004 x4 : ffffffc96e8690a0
x3 : 0000001ed7cbab74 x2 : ffffffc96e869000
x1 : 0000000000000000 x0 : 0000000000000000
Process systemd-udevd (pid: 1047, stack limit = 0xffffffc974e4c020)
Stack: (0xffffffc974e4ff00 to 0xffffffc974e50000)
ff00: 0000000000000417 0000007fa1ce76f0 00000000000000dc 0000000000000417
ff20: 00000000ffffffff 0000007fddb7ecf8 0000000000000005 ffffffffffffffff
ff40: 00000000ff000001 003b9aca00000000 000000555b3868b0 0000007fa1b40d90
ff60: 0000000000000a03 0000007fddb7e5c0 0000000000000000 0000007fddb7e5e0
ff80: 000000555b358000 000000558f56f0e0 0000000000000000 000000558f574f00
ffa0: 000000558f574f00 00000000000004fa 000000558f56f010 0000007fddb7e600
ffc0: 0000007fa1b40e2c 0000007fddb7e5c0 0000007fa1b40e60 0000000060000000
ffe0: 0000000001200011 00000000000000dc 0004000084000200 0800000002000000
Call trace:
[< (null)>] (null)
Code: bad PC value
---[ end trace 35d24aad799c2941 ]---
-------------------------%<-------------------------
Thanks,
James
WARNING: multiple messages have this Message-ID (diff)
From: James Morse <james.morse@arm.com>
To: David Long <dave.long@linaro.org>
Cc: "Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will.deacon@arm.com>,
"Sandeepa Prabhu" <sandeepa.s.prabhu@gmail.com>,
"William Cohen" <wcohen@redhat.com>,
"Pratyush Anand" <panand@redhat.com>,
"Steve Capper" <steve.capper@linaro.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
"Marc Zyngier" <marc.zyngier@arm.com>,
"Dave P Martin" <Dave.Martin@arm.com>,
"Mark Rutland" <mark.rutland@arm.com>,
"Robin Murphy" <Robin.Murphy@arm.com>,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
"Jens Wiklander" <jens.wiklander@linaro.org>,
"Christoffer Dall" <christoffer.dall@linaro.org>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Yang Shi" <yang.shi@linaro.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Viresh Kumar" <viresh.kumar@linaro.org>,
"Suzuki K. Poulose" <suzuki.poulose@arm.com>,
"Kees Cook" <keescook@chromium.org>,
"Zi Shen Lim" <zlim.lnx@gmail.com>,
"John Blackwood" <john.blackwood@ccur.com>,
"Feng Kan" <fkan@apm.com>,
"Balamurugan Shanmugam" <bshanmugam@apm.com>,
"Vladimir Murzin" <Vladimir.Murzin@arm.com>,
"Mark Salyzyn" <salyzyn@android.com>,
"Petr Mladek" <pmladek@suse.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Mark Brown" <broonie@kernel.org>
Subject: Re: [PATCH v12 00/10] arm64: Add kernel probes (kprobes) support
Date: Wed, 11 May 2016 16:33:06 +0100 [thread overview]
Message-ID: <573350B2.4010701@arm.com> (raw)
In-Reply-To: <1461783185-9056-1-git-send-email-dave.long@linaro.org>
Hi David,
On 27/04/16 19:52, David Long wrote:
> From: "David A. Long" <dave.long@linaro.org>
>
> This patchset is heavily based on Sandeepa Prabhu's ARM v8 kprobes patches,
> first seen in October 2013. This version attempts to address concerns raised by
> reviewers and also fixes problems discovered during testing.
>
> This patchset adds support for kernel probes(kprobes), jump probes(jprobes)
> and return probes(kretprobes) support for ARM64.
>
> The kprobes mechanism makes use of software breakpoint and single stepping
> support available in the ARM v8 kernel.
I applied this series on v4.6-rc7, and built the sample kprobes. They work fine,
unless I throw ftrace into the mix too.
I enabled the function_graph tracer, then tried to load the jprobe example module:
-------------------------%<-------------------------
root@ubuntu:/sys/kernel/debug/tracing# insmod /root/jprobe_example.ko
Planted jprobe at ffffff80080c8f20, handler addr ffffff8000bb3000
root@ubuntu:/sys/kernel/debug/tracing# jprobe: clone_flags = 0x1200011, stack_st
art = 0x0 stack_size = 0x0
Bad mode in Synchronous Abort handler detected, code 0x86000005 -- IABT (current
EL)
CPU: 5 PID: 1047 Comm: systemd-udevd Not tainted 4.6.0-rc7+ #4064
Hardware name: ARM Juno development board (r1) (DT)
task: ffffffc975948300 ti: ffffffc974e4c000 task.ti: ffffffc974e4c000
PC is at 0x0
LR is at 0x0
pc : [<0000000000000000>] lr : [<0000000000000000>] pstate: 60000145
sp : ffffffc974e4ff00
x29: 0000000001200011 x28: ffffffc974e4c000
x27: ffffff80088d0000 x26: 00000000000000dc
x25: 0000000000000120 x24: 0000000000000015
x23: 0000000060000000 x22: 0000007fa1b40e60
x21: 0000007fa1ce70d0 x20: 0000000000000000
x19: 0000000000000000 x18: 0000000000000a03
x17: 0000007fa1b40d90 x16: ffffff80080c9708
x15: 003b9aca00000000 x14: 0000007fddb7e5c0
x13: 0000007fa1b40e2c x12: 0000000000d00ff0
x11: ffffff8009c4d000 x10: ffffff800920c000
x9 : ffffff8008f5c000 x8 : ffffffc976c06800
x7 : 000000000006daf2 x6 : 0000000000000015
x5 : 0000000000000004 x4 : ffffffc96e8690a0
x3 : 0000001ed7cbab74 x2 : ffffffc96e869000
x1 : 0000000000000000 x0 : 0000000000000000
Internal error: Oops - bad mode: 0 [#1] PREEMPT SMP
Modules linked in: jprobe_example
CPU: 5 PID: 1047 Comm: systemd-udevd Not tainted 4.6.0-rc7+ #4064
Hardware name: ARM Juno development board (r1) (DT)
task: ffffffc975948300 ti: ffffffc974e4c000 task.ti: ffffffc974e4c000
PC is at 0x0
LR is at 0x0
pc : [<0000000000000000>] lr : [<0000000000000000>] pstate: 60000145
sp : ffffffc974e4ff00
x29: 0000000001200011 x28: ffffffc974e4c000
x27: ffffff80088d0000 x26: 00000000000000dc
x25: 0000000000000120 x24: 0000000000000015
x23: 0000000060000000 x22: 0000007fa1b40e60
x21: 0000007fa1ce70d0 x20: 0000000000000000
x19: 0000000000000000 x18: 0000000000000a03
x17: 0000007fa1b40d90 x16: ffffff80080c9708
x15: 003b9aca00000000 x14: 0000007fddb7e5c0
x13: 0000007fa1b40e2c x12: 0000000000d00ff0
x11: ffffff8009c4d000 x10: ffffff800920c000
x9 : ffffff8008f5c000 x8 : ffffffc976c06800
x7 : 000000000006daf2 x6 : 0000000000000015
x5 : 0000000000000004 x4 : ffffffc96e8690a0
x3 : 0000001ed7cbab74 x2 : ffffffc96e869000
x1 : 0000000000000000 x0 : 0000000000000000
Process systemd-udevd (pid: 1047, stack limit = 0xffffffc974e4c020)
Stack: (0xffffffc974e4ff00 to 0xffffffc974e50000)
ff00: 0000000000000417 0000007fa1ce76f0 00000000000000dc 0000000000000417
ff20: 00000000ffffffff 0000007fddb7ecf8 0000000000000005 ffffffffffffffff
ff40: 00000000ff000001 003b9aca00000000 000000555b3868b0 0000007fa1b40d90
ff60: 0000000000000a03 0000007fddb7e5c0 0000000000000000 0000007fddb7e5e0
ff80: 000000555b358000 000000558f56f0e0 0000000000000000 000000558f574f00
ffa0: 000000558f574f00 00000000000004fa 000000558f56f010 0000007fddb7e600
ffc0: 0000007fa1b40e2c 0000007fddb7e5c0 0000007fa1b40e60 0000000060000000
ffe0: 0000000001200011 00000000000000dc 0004000084000200 0800000002000000
Call trace:
[< (null)>] (null)
Code: bad PC value
---[ end trace 35d24aad799c2941 ]---
-------------------------%<-------------------------
Thanks,
James
next prev parent reply other threads:[~2016-05-11 15:33 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-27 18:52 [PATCH v12 00/10] arm64: Add kernel probes (kprobes) support David Long
2016-04-27 18:52 ` David Long
2016-04-27 18:52 ` [PATCH v12 01/10] arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature David Long
2016-04-27 18:52 ` David Long
2016-04-28 16:08 ` Marc Zyngier
2016-04-28 16:08 ` Marc Zyngier
2016-05-13 19:07 ` David Long
2016-05-13 19:07 ` David Long
2016-05-17 9:14 ` Huang Shijie
2016-05-17 9:14 ` Huang Shijie
2016-05-20 4:18 ` David Long
2016-05-20 4:18 ` David Long
2016-04-27 18:52 ` [PATCH v12 02/10] arm64: Add more test functions to insn.c David Long
2016-04-27 18:52 ` David Long
2016-04-27 18:52 ` [PATCH v12 03/10] arm64: add conditional instruction simulation support David Long
2016-04-27 18:52 ` David Long
2016-04-27 18:52 ` [PATCH v12 04/10] arm64: Blacklist non-kprobe-able symbols David Long
2016-04-27 18:52 ` David Long
2016-04-27 18:53 ` [PATCH v12 05/10] arm64: Kprobes with single stepping support David Long
2016-04-27 18:53 ` David Long
2016-05-12 15:01 ` James Morse
2016-05-12 15:01 ` James Morse
2016-05-18 4:04 ` Masami Hiramatsu
2016-05-18 4:04 ` Masami Hiramatsu
2016-05-20 5:16 ` David Long
2016-05-20 5:16 ` David Long
2016-05-17 8:58 ` Huang Shijie
2016-05-17 8:58 ` Huang Shijie
2016-05-18 3:29 ` Masami Hiramatsu
2016-05-18 3:29 ` Masami Hiramatsu
2016-05-26 19:25 ` David Long
2016-05-26 19:25 ` David Long
2016-05-26 15:40 ` David Long
2016-05-26 15:40 ` David Long
2016-05-17 9:10 ` Huang Shijie
2016-05-17 9:10 ` Huang Shijie
2016-06-01 5:15 ` David Long
2016-06-01 5:15 ` David Long
2016-04-27 18:53 ` [PATCH v12 06/10] arm64: Treat all entry code as non-kprobe-able David Long
2016-04-27 18:53 ` David Long
2016-05-12 14:49 ` James Morse
2016-05-12 14:49 ` James Morse
2016-05-20 5:28 ` David Long
2016-05-20 5:28 ` David Long
2016-05-26 15:26 ` David Long
2016-05-26 15:26 ` David Long
2016-04-27 18:53 ` [PATCH v12 07/10] arm64: kprobes instruction simulation support David Long
2016-04-27 18:53 ` David Long
2016-05-19 1:52 ` Huang Shijie
2016-05-19 1:52 ` Huang Shijie
2016-05-26 19:28 ` David Long
2016-05-26 19:28 ` David Long
2016-04-27 18:53 ` [PATCH v12 08/10] arm64: Add trampoline code for kretprobes David Long
2016-04-27 18:53 ` David Long
2016-04-27 18:53 ` [PATCH v12 09/10] arm64: Add kernel return probes support (kretprobes) David Long
2016-04-27 18:53 ` David Long
2016-04-27 18:53 ` [PATCH v12 10/10] kprobes: Add arm64 case in kprobe example module David Long
2016-04-27 18:53 ` David Long
2016-05-17 9:57 ` Huang Shijie
2016-05-17 9:57 ` Huang Shijie
2016-05-17 10:24 ` Mark Brown
2016-05-17 10:24 ` Mark Brown
2016-05-18 1:31 ` Huang Shijie
2016-05-18 1:31 ` Huang Shijie
2016-05-11 15:33 ` James Morse [this message]
2016-05-11 15:33 ` [PATCH v12 00/10] arm64: Add kernel probes (kprobes) support James Morse
2016-05-12 2:26 ` Li Bin
2016-05-12 2:26 ` Li Bin
2016-05-13 20:02 ` David Long
2016-05-13 20:02 ` David Long
2016-05-18 2:24 ` Huang Shijie
2016-05-18 2:24 ` Huang Shijie
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=573350B2.4010701@arm.com \
--to=james.morse@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.