Messages in this thread | | | Date | Wed, 17 Jun 2015 23:18:42 +0900 | From | Masami Hiramatsu <> | Subject | Re: [PATCH v7 0/7] arm64: Add kernel probes (kprobes) support |
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Hi David,
At first, thank you for updating this series! :)
On 2015/06/16 4:07, 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. > > The is patch depends on: > [PATCH 1/2] Move the pt_regs_offset struct definition from arch to common include file > [PATCH 2/2] Consolidate redundant register/stack access code >
Hmm, what are those patches ? Would they be not merged to upstream yet? If so, where I can get them from? I'd like to know the actual url for them.
[...] > Changes since v6 include: > > 1) New trampoline code from Will Cohen fixes the occasional failure seen > when processing kretprobes by replacing the software breakpoint with > assembly code to implement the return to the original execution stream.
Yeah, that's what we need :)
Thank you,
> 2) Changed ip0, ip1, fp, and lr to plain numbered registers for purposes > of recognizing them as an ascii string in the stack/reg access code. > 3) Removed orig_x0. > 4) Moved ARM_x* defines from arch/arm64/include/uapi/asm/ptrace.h to > arch/arm64/kernel/ptrace.c. > > David A. Long (2): > arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature > arm64: Add more test functions to insn.c > > Sandeepa Prabhu (4): > arm64: Kprobes with single stepping support > arm64: kprobes instruction simulation support > arm64: Add kernel return probes support (kretprobes) > kprobes: Add arm64 case in kprobe example module > > William Cohen (1): > arm64: Add trampoline code for kretprobes > > arch/arm64/Kconfig | 3 + > arch/arm64/include/asm/debug-monitors.h | 5 + > arch/arm64/include/asm/insn.h | 18 + > arch/arm64/include/asm/kprobes.h | 63 +++ > arch/arm64/include/asm/probes.h | 50 +++ > arch/arm64/include/asm/ptrace.h | 28 +- > arch/arm64/kernel/Makefile | 3 + > arch/arm64/kernel/debug-monitors.c | 35 +- > arch/arm64/kernel/insn.c | 28 ++ > arch/arm64/kernel/kprobes-arm64.c | 166 ++++++++ > arch/arm64/kernel/kprobes-arm64.h | 71 ++++ > arch/arm64/kernel/kprobes.c | 665 +++++++++++++++++++++++++++++++ > arch/arm64/kernel/kprobes.h | 24 ++ > arch/arm64/kernel/probes-condn-check.c | 122 ++++++ > arch/arm64/kernel/probes-simulate-insn.c | 174 ++++++++ > arch/arm64/kernel/probes-simulate-insn.h | 33 ++ > arch/arm64/kernel/ptrace.c | 77 ++++ > arch/arm64/kernel/vmlinux.lds.S | 1 + > arch/arm64/mm/fault.c | 25 ++ > samples/kprobes/kprobe_example.c | 8 + > 20 files changed, 1588 insertions(+), 11 deletions(-) > create mode 100644 arch/arm64/include/asm/kprobes.h > create mode 100644 arch/arm64/include/asm/probes.h > create mode 100644 arch/arm64/kernel/kprobes-arm64.c > create mode 100644 arch/arm64/kernel/kprobes-arm64.h > create mode 100644 arch/arm64/kernel/kprobes.c > create mode 100644 arch/arm64/kernel/kprobes.h > create mode 100644 arch/arm64/kernel/probes-condn-check.c > create mode 100644 arch/arm64/kernel/probes-simulate-insn.c > create mode 100644 arch/arm64/kernel/probes-simulate-insn.h >
-- Masami HIRAMATSU Linux Technology Research Center, System Productivity Research Dept. Center for Technology Innovation - Systems Engineering Hitachi, Ltd., Research & Development Group E-mail: masami.hiramatsu.pt@hitachi.com
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