From: masami.hiramatsu.pt@hitachi•com (Masami Hiramatsu)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH RFC v2 0/6] ARM64: Add kernel probes(Kprobes) support
Date: Fri, 18 Oct 2013 17:32:08 +0900 [thread overview]
Message-ID: <5260F208.9000800@hitachi.com> (raw)
In-Reply-To: <1382008671-4515-1-git-send-email-sandeepa.prabhu@linaro.org>
(2013/10/17 20:17), Sandeepa Prabhu wrote:
> This patchset adds support for kernel probes(kprobes), jump probes(jprobes)
> and return probes(kretprobes) support for ARM64.
>
> Kprobes mechanism make use of software breakpoint and single stepping
> support available in ARM v8 kernel.
>
Thank you! This looks much better for me now. ;)
> This patchset make use of (and dependant upon) dynamic kernel patching
> feature published in patch series: https://lkml.org/lkml/2013/10/15/891
>
> changes: v1 -> v2
> 1. Implemented review comments on v1
> 2. Debug montior hooks implementation is changed to use rwlocks
> instead of rcu and spinlock.
Eventually, we'd better reconsider using rcu there, or prohibit probing
readlock related functions. For the first step, this will be good.
> 3. Enabled recursing in kprobes handler for kprobes re-enter support.
> 4. Re-split the patchset to seperate single-stepping, simulation and
> kretprobes features.
> 5. instruction simulation is made independent of 'struct kprobes'
> 6. Added 'Linaro Copyright' statements in new added files.
> 7. Used arm64 instead of aarch64 in file names and comments.
>
> Tested on ARM v8 fast model with sample modules from: samples/kprobes/
>
> Sandeepa Prabhu (6):
> arm64: support single-step and breakpoint handler hooks
> arm64: Kprobes with single stepping support
> arm64: Kprobes instruction simulation support
> arm64: Add kernel return probes support(kretprobes)
> arm64: Enable kprobes support for arm64 platform
> kprobes: Add cases for arm and arm64 in sample module
>
> arch/arm64/Kconfig | 2 +
> arch/arm64/configs/defconfig | 20 +-
> arch/arm64/include/asm/debug-monitors.h | 21 +
> arch/arm64/include/asm/kprobes.h | 60 +++
> arch/arm64/include/asm/probes.h | 50 +++
> arch/arm64/include/asm/ptrace.h | 6 +
> arch/arm64/kernel/Makefile | 2 +
> arch/arm64/kernel/condn-helpers.c | 120 ++++++
> arch/arm64/kernel/debug-monitors.c | 86 +++-
> arch/arm64/kernel/entry.S | 2 +
> arch/arm64/kernel/kprobes-arm64.c | 313 +++++++++++++++
> arch/arm64/kernel/kprobes-arm64.h | 30 ++
One comment, this name looks a bit wired. Since it seems that these are
for instruction decoding, can we merge it with probe-decode.h and
rename it as probe-decode.{h,c}? When we implement uprobes, we still
can expand it (add the decoding table for uprobes in the probe-decode.c).
> arch/arm64/kernel/kprobes.c | 682 ++++++++++++++++++++++++++++++++
> arch/arm64/kernel/kprobes.h | 30 ++
> arch/arm64/kernel/probes-decode.h | 110 ++++++
> arch/arm64/kernel/simulate-insn.c | 184 +++++++++
> arch/arm64/kernel/simulate-insn.h | 33 ++
> arch/arm64/kernel/vmlinux.lds.S | 1 +
> samples/kprobes/kprobe_example.c | 16 +
> 19 files changed, 1756 insertions(+), 12 deletions(-)
BTW, is there any public git repository which has this series?
Thank you again!
--
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt at hitachi.com
next prev parent reply other threads:[~2013-10-18 8:32 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-17 11:17 [PATCH RFC v2 0/6] ARM64: Add kernel probes(Kprobes) support Sandeepa Prabhu
2013-10-17 11:17 ` [PATCH RFC v4 1/6] arm64: support single-step and breakpoint handler hooks Sandeepa Prabhu
2013-10-25 15:22 ` Will Deacon
2013-12-03 14:33 ` Sandeepa Prabhu
2013-12-03 19:44 ` Will Deacon
2013-10-17 11:17 ` [PATCH RFC 2/6] arm64: Kprobes with single stepping support Sandeepa Prabhu
2013-11-08 16:56 ` Will Deacon
2013-11-09 9:10 ` Masami Hiramatsu
2013-11-11 5:39 ` Sandeepa Prabhu
2013-11-11 7:54 ` Masami Hiramatsu
2013-11-11 10:51 ` Masami Hiramatsu
2013-11-11 10:58 ` Will Deacon
2013-11-11 17:32 ` Masami Hiramatsu
2013-11-12 6:23 ` Sandeepa Prabhu
2013-11-12 7:27 ` Masami Hiramatsu
2013-11-12 8:44 ` Sandeepa Prabhu
2013-11-12 10:17 ` Masami Hiramatsu
2013-11-12 10:55 ` Sandeepa Prabhu
2013-11-12 14:11 ` Masami Hiramatsu
2013-11-12 16:59 ` Steven Rostedt
2013-11-13 16:05 ` Masami Hiramatsu
[not found] ` <CA+b37P1sNsEXrJFfVL51sZ-SeGNCBiwXnOwCiFY8CBwSXPw+mQ@mail.gmail.com>
2013-11-13 7:08 ` Sandeepa Prabhu
2013-11-13 14:07 ` Masami Hiramatsu
2013-11-13 14:31 ` Will Deacon
2013-11-13 15:55 ` Sandeepa Prabhu
2013-11-15 16:39 ` Will Deacon
2013-11-18 6:55 ` Sandeepa Prabhu
2013-11-18 8:51 ` Sandeepa Prabhu
2013-11-13 13:58 ` Peter Zijlstra
2013-11-13 14:20 ` Will Deacon
2013-11-11 5:35 ` Sandeepa Prabhu
2013-11-11 11:21 ` Will Deacon
2013-11-12 6:52 ` Sandeepa Prabhu
2013-11-15 16:37 ` Will Deacon
2013-11-18 6:43 ` Sandeepa Prabhu
2013-10-17 11:17 ` [PATCH RFC 3/6] arm64: Kprobes instruction simulation support Sandeepa Prabhu
2013-11-08 17:03 ` Will Deacon
2013-11-11 5:58 ` Sandeepa Prabhu
2013-10-17 11:17 ` [PATCH RFC 4/6] arm64: Add kernel return probes support(kretprobes) Sandeepa Prabhu
2013-11-08 17:04 ` Will Deacon
2013-11-11 4:29 ` Sandeepa Prabhu
2013-11-11 7:53 ` AKASHI Takahiro
2013-11-11 8:55 ` Sandeepa Prabhu
2013-10-17 11:17 ` [PATCH RFC 5/6] arm64: Enable kprobes support for arm64 platform Sandeepa Prabhu
2013-10-17 11:17 ` [PATCH RFC 6/6] kprobes: Add cases for arm and arm64 in sample module Sandeepa Prabhu
2013-10-25 15:24 ` Will Deacon
2013-11-06 11:05 ` Sandeepa Prabhu
2013-10-18 8:32 ` Masami Hiramatsu [this message]
2013-10-21 4:17 ` [PATCH RFC v2 0/6] ARM64: Add kernel probes(Kprobes) support Sandeepa Prabhu
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=5260F208.9000800@hitachi.com \
--to=masami.hiramatsu.pt@hitachi$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox