From d9cae1b0f2fce2c0aabf6cdaaa7d45e4c480932d Mon Sep 17 00:00:00 2001
From: compudj <compudj@04897980-b3bd-0310-b5e0-8ef037075253>
Date: Thu, 8 May 2008 09:39:23 +0000
Subject: [PATCH 1/1] update rcu

git-svn-id: http://ltt.polymtl.ca/svn@2903 04897980-b3bd-0310-b5e0-8ef037075253
---
 tests/kernel/test-kprobes2.c | 74 ++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 tests/kernel/test-kprobes2.c

diff --git a/tests/kernel/test-kprobes2.c b/tests/kernel/test-kprobes2.c
new file mode 100644
index 00000000..164ec32d
--- /dev/null
+++ b/tests/kernel/test-kprobes2.c
@@ -0,0 +1,74 @@
+/* test-kprobes.c
+ *
+ * kprobe timing test.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/kprobes.h>
+#include <linux/kallsyms.h>
+#include <linux/sched.h>
+
+
+/*For each probe you need to allocate a kprobe structure*/
+static struct kprobe kp;
+
+/*kprobe pre_handler: called just before the probed instruction is executed*/
+int handler_pre(struct kprobe *p, struct pt_regs *regs)
+{
+	//printk("pre_handler: p->addr=0x%p, eip=%lx, eflags=0x%lx\n",
+	//	p->addr, regs->eip, regs->eflags);
+	//dump_stack();
+	return 0;
+}
+
+/*kprobe post_handler: called after the probed instruction is executed*/
+void handler_post(struct kprobe *p, struct pt_regs *regs, unsigned long flags)
+{
+	//printk("post_handler: p->addr=0x%p, eflags=0x%lx\n",
+	//	p->addr, regs->eflags);
+}
+
+/* fault_handler: this is called if an exception is generated for any
+ * instruction within the pre- or post-handler, or when Kprobes
+ * single-steps the probed instruction.
+ */
+int handler_fault(struct kprobe *p, struct pt_regs *regs, int trapnr)
+{
+	//printk("fault_handler: p->addr=0x%p, trap #%dn",
+	//	p->addr, trapnr);
+	/* Return 0 because we don't handle the fault. */
+	return 0;
+}
+
+int init_module(void)
+{
+	int ret;
+	kp.pre_handler = handler_pre;
+	kp.post_handler = handler_post;
+	kp.fault_handler = handler_fault;
+	//kp.addr = (kprobe_opcode_t*) kallsyms_lookup_name("do_fork");
+	kp.addr = (void*)0xf886b000;
+	/* register the kprobe now */
+	if (!kp.addr) {
+		printk("Couldn't find %s to plant kprobe\n", "do_fork");
+		return -1;
+	}
+	if ((ret = register_kprobe(&kp) < 0)) {
+		printk("register_kprobe failed, returned %d\n", ret);
+		return -1;
+	}
+	printk("kprobe registered\n");
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	unregister_kprobe(&kp);
+	printk("kprobe unregistered\n");
+}
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_DESCRIPTION("Linux Trace Toolkit Test");
+
-- 
2.34.1