linux-kernel - [PATCH v3 00/16] kprobes: Unify kretprobe trampoline handlers

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Message-Id: <159854631442.736475.5062989489155389472.stgit@devnote2>
Date:   Fri, 28 Aug 2020 01:38:34 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>
Cc:     Eddy Wu <Eddy_Wu@...ndmicro.com>, x86@...nel.org,
        "David S . Miller" <davem@...emloft.net>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        "Naveen N . Rao" <naveen.n.rao@...ux.ibm.com>,
        Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
        linux-arch@...r.kernel.org, guoren@...nel.org
Subject: [PATCH v3 00/16] kprobes: Unify kretprobe trampoline handlers

Hi,

Here is the 3rd version of the series to unify the kretprobe trampoline handler
implementation across all architectures which are currently kprobes supported.
Previous version is here;

 https://lkml.kernel.org/r/159852811819.707944.12798182250041968537.stgit@devnote2

This series removes the in_nmi() check from pre_kretprobe_handler() since we
can avoid double-lock deadlock from NMI by kprobe_busy_begin/end() and use
kfree_rcu() to release kretprobe_instance. Also, cleanup local functions to
static symbols.

Thank you,

---

Masami Hiramatsu (16):
      kprobes: Add generic kretprobe trampoline handler
      x86/kprobes: Use generic kretprobe trampoline handler
      arm: kprobes: Use generic kretprobe trampoline handler
      arm64: kprobes: Use generic kretprobe trampoline handler
      arc: kprobes: Use generic kretprobe trampoline handler
      csky: kprobes: Use generic kretprobe trampoline handler
      ia64: kprobes: Use generic kretprobe trampoline handler
      mips: kprobes: Use generic kretprobe trampoline handler
      parisc: kprobes: Use generic kretprobe trampoline handler
      powerpc: kprobes: Use generic kretprobe trampoline handler
      s390: kprobes: Use generic kretprobe trampoline handler
      sh: kprobes: Use generic kretprobe trampoline handler
      sparc: kprobes: Use generic kretprobe trampoline handler
      kprobes: Remove NMI context check
      kprobes: Free kretprobe_instance with rcu callback
      kprobes: Make local used functions static


 arch/arc/kernel/kprobes.c          |   55 +--------------
 arch/arm/probes/kprobes/core.c     |   79 +--------------------
 arch/arm64/kernel/probes/kprobes.c |   79 +--------------------
 arch/csky/kernel/probes/kprobes.c  |   78 +--------------------
 arch/ia64/kernel/kprobes.c         |   79 +--------------------
 arch/mips/kernel/kprobes.c         |   55 +--------------
 arch/parisc/kernel/kprobes.c       |   78 ++-------------------
 arch/powerpc/kernel/kprobes.c      |   55 +--------------
 arch/s390/kernel/kprobes.c         |   81 +--------------------
 arch/sh/kernel/kprobes.c           |   59 +---------------
 arch/sparc/kernel/kprobes.c        |   52 +-------------
 arch/x86/kernel/kprobes/core.c     |  109 +----------------------------
 include/linux/kprobes.h            |   51 ++++++++------
 kernel/kprobes.c                   |  136 +++++++++++++++++++++++++++++-------
 14 files changed, 190 insertions(+), 856 deletions(-)

--
Masami Hiramatsu (Linaro) <mhiramat@...nel.org>