linux-kernel - [PATCH 3/7] kprobes: Add __kprobes to kprobe internal functions

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Date:	Tue, 11 Nov 2008 15:56:40 -0500
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	David Miller <davem@...emloft.net>,
	LKML <linux-kernel@...r.kernel.org>,
	systemtap-ml <systemtap@...rces.redhat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Srinivasa Ds <srinivasa@...ibm.com>
Subject: [PATCH 3/7] kprobes: Add __kprobes to kprobe internal functions

Add __kprobes to kprobes internal functions for protecting
from probing by kprobes itself.

Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
---
 kernel/kprobes.c |   16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

This patch is required for the patch 5/7.

Index: 2.6.28-rc4/kernel/kprobes.c
===================================================================
--- 2.6.28-rc4.orig/kernel/kprobes.c
+++ 2.6.28-rc4/kernel/kprobes.c
@@ -410,7 +410,7 @@ void __kprobes recycle_rp_inst(struct kr
 		hlist_add_head(&ri->hlist, head);
 }

-void kretprobe_hash_lock(struct task_struct *tsk,
+void __kprobes kretprobe_hash_lock(struct task_struct *tsk,
 			 struct hlist_head **head, unsigned long *flags)
 {
 	unsigned long hash = hash_ptr(tsk, KPROBE_HASH_BITS);
@@ -421,13 +421,15 @@ void kretprobe_hash_lock(struct task_str
 	spin_lock_irqsave(hlist_lock, *flags);
 }

-static void kretprobe_table_lock(unsigned long hash, unsigned long *flags)
+static void __kprobes kretprobe_table_lock(unsigned long hash,
+	unsigned long *flags)
 {
 	spinlock_t *hlist_lock = kretprobe_table_lock_ptr(hash);
 	spin_lock_irqsave(hlist_lock, *flags);
 }

-void kretprobe_hash_unlock(struct task_struct *tsk, unsigned long *flags)
+void __kprobes kretprobe_hash_unlock(struct task_struct *tsk,
+	unsigned long *flags)
 {
 	unsigned long hash = hash_ptr(tsk, KPROBE_HASH_BITS);
 	spinlock_t *hlist_lock;
@@ -436,7 +438,7 @@ void kretprobe_hash_unlock(struct task_s
 	spin_unlock_irqrestore(hlist_lock, *flags);
 }

-void kretprobe_table_unlock(unsigned long hash, unsigned long *flags)
+void __kprobes kretprobe_table_unlock(unsigned long hash, unsigned long *flags)
 {
 	spinlock_t *hlist_lock = kretprobe_table_lock_ptr(hash);
 	spin_unlock_irqrestore(hlist_lock, *flags);
@@ -762,7 +764,7 @@ static void __kprobes __unregister_kprob
 	}
 }

-static int __register_kprobes(struct kprobe **kps, int num,
+static int __kprobes __register_kprobes(struct kprobe **kps, int num,
 	unsigned long called_from)
 {
 	int i, ret = 0;
@@ -828,7 +830,7 @@ unsigned long __weak arch_deref_entry_po
 	return (unsigned long)entry;
 }

-static int __register_jprobes(struct jprobe **jps, int num,
+static int __kprobes __register_jprobes(struct jprobe **jps, int num,
 	unsigned long called_from)
 {
 	struct jprobe *jp;
@@ -990,7 +992,7 @@ static int __kprobes __register_kretprob
 	return ret;
 }

-static int __register_kretprobes(struct kretprobe **rps, int num,
+static int __kprobes __register_kretprobes(struct kretprobe **rps, int num,
 	unsigned long called_from)
 {
 	int ret = 0, i;

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com

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