linux-kernel - [PATCH 1/2] kprobes: add a new module parameter

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Date:	Wed, 18 May 2016 09:36:56 +0800
From:	Huang Shijie <shijie.huang@....com>
To:	<akpm@...ux-foundation.org>
CC:	<pmladek@...e.com>, <linux-kernel@...r.kernel.org>,
	<steve.capper@....com>, <nd@....com>,
	Huang Shijie <shijie.huang@....com>
Subject: [PATCH 1/2] kprobes: add a new module parameter

This patch adds a new module parameter which can be used as the
symbol name. With this parameter, the module becomes more flexable.

Signed-off-by: Huang Shijie <shijie.huang@....com>
---
 samples/kprobes/kprobe_example.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/samples/kprobes/kprobe_example.c b/samples/kprobes/kprobe_example.c
index 727eb21..2bb190d 100644
--- a/samples/kprobes/kprobe_example.c
+++ b/samples/kprobes/kprobe_example.c
@@ -14,9 +14,13 @@
 #include <linux/module.h>
 #include <linux/kprobes.h>
 
+#define MAX_SYMBOL_LEN	64
+static char symbol[MAX_SYMBOL_LEN] = "_do_fork";
+module_param_string(symbol, symbol, sizeof(symbol), 0644);
+
 /* For each probe you need to allocate a kprobe structure */
 static struct kprobe kp = {
-	.symbol_name	= "_do_fork",
+	.symbol_name	= symbol,
 };
 
 /* kprobe pre_handler: called just before the probed instruction is executed */
-- 
2.5.5