From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
To: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Sandeepa Prabhu <sandeepa.prabhu@linaro.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
x86@kernel.org, Steven Rostedt <rostedt@goodmis.org>,
fche@redhat.com, mingo@redhat.com, systemtap@sourceware.org,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH -tip v10 2/7] kprobes: Use NOKPROBE_SYMBOL() in sample modules
Date: Thu, 08 May 2014 18:38:56 +0900 [thread overview]
Message-ID: <20140508093856.31767.92079.stgit@ltc230.yrl.intra.hitachi.co.jp> (raw)
In-Reply-To: <20140508093842.31767.43766.stgit@ltc230.yrl.intra.hitachi.co.jp>
Use NOKPROBE_SYMBOL() to protect handlers from kprobes
in sample modules.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Ananth N Mavinakayanahalli <ananth@in.ibm.com>
---
samples/kprobes/jprobe_example.c | 1 +
samples/kprobes/kprobe_example.c | 3 +++
samples/kprobes/kretprobe_example.c | 2 ++
3 files changed, 6 insertions(+)
diff --git a/samples/kprobes/jprobe_example.c b/samples/kprobes/jprobe_example.c
index b754135..40114ac 100644
--- a/samples/kprobes/jprobe_example.c
+++ b/samples/kprobes/jprobe_example.c
@@ -35,6 +35,7 @@ static long jdo_fork(unsigned long clone_flags, unsigned long stack_start,
jprobe_return();
return 0;
}
+NOKPROBE_SYMBOL(jdo_fork);
static struct jprobe my_jprobe = {
.entry = jdo_fork,
diff --git a/samples/kprobes/kprobe_example.c b/samples/kprobes/kprobe_example.c
index 366db1a..462d90f 100644
--- a/samples/kprobes/kprobe_example.c
+++ b/samples/kprobes/kprobe_example.c
@@ -46,6 +46,7 @@ static int handler_pre(struct kprobe *p, struct pt_regs *regs)
/* A dump_stack() here will give a stack backtrace */
return 0;
}
+NOKPROBE_SYMBOL(handler_pre);
/* kprobe post_handler: called after the probed instruction is executed */
static void handler_post(struct kprobe *p, struct pt_regs *regs,
@@ -68,6 +69,7 @@ static void handler_post(struct kprobe *p, struct pt_regs *regs,
p->addr, regs->ex1);
#endif
}
+NOKPROBE_SYMBOL(handler_post);
/*
* fault_handler: this is called if an exception is generated for any
@@ -81,6 +83,7 @@ static int handler_fault(struct kprobe *p, struct pt_regs *regs, int trapnr)
/* Return 0 because we don't handle the fault. */
return 0;
}
+NOKPROBE_SYMBOL(handler_fault);
static int __init kprobe_init(void)
{
diff --git a/samples/kprobes/kretprobe_example.c b/samples/kprobes/kretprobe_example.c
index 1041b67..d932c52 100644
--- a/samples/kprobes/kretprobe_example.c
+++ b/samples/kprobes/kretprobe_example.c
@@ -47,6 +47,7 @@ static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
data->entry_stamp = ktime_get();
return 0;
}
+NOKPROBE_SYMBOL(entry_handler);
/*
* Return-probe handler: Log the return value and duration. Duration may turn
@@ -66,6 +67,7 @@ static int ret_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
func_name, retval, (long long)delta);
return 0;
}
+NOKPROBE_SYMBOL(ret_handler);
static struct kretprobe my_kretprobe = {
.handler = ret_handler,
next prev parent reply other threads:[~2014-05-08 9:39 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-08 9:38 [PATCH -tip v10 0/7] kprobes: NOKPROBE_SYMBOL for modules, and scalbility efforts Masami Hiramatsu
2014-05-08 9:38 ` [PATCH -tip v10 1/7] kprobes: Support blacklist functions in module Masami Hiramatsu
2014-05-08 9:38 ` Masami Hiramatsu [this message]
2014-05-08 9:39 ` [PATCH -tip v10 3/7] kprobes/x86: Use kprobe_blacklist for .kprobes.text and .entry.text Masami Hiramatsu
2014-05-08 9:39 ` [PATCH -tip v10 4/7] kprobes/x86: Remove unneeded preempt_disable/enable in interrupt handlers Masami Hiramatsu
2014-05-08 9:39 ` [PATCH -tip v10 5/7] kprobes: Enlarge hash table to 512 entries Masami Hiramatsu
2014-05-08 9:39 ` [PATCH -tip v10 6/7] kprobes: Introduce kprobe cache to reduce cache misshits Masami Hiramatsu
2014-05-08 9:39 ` [PATCH -tip v10 7/7] ftrace: Introduce FTRACE_OPS_FL_SELF_FILTER for ftrace-kprobe Masami Hiramatsu
2014-05-08 10:59 ` Steven Rostedt
2014-05-09 3:11 ` Masami Hiramatsu
2014-05-09 3:43 ` Steven Rostedt
2014-05-09 10:04 ` [PATCH -tip v10.1] " Masami Hiramatsu
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