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authorKeshavamurthy Anil S <anil.s.keshavamurthy@intel.com>2005-12-12 03:37:33 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-12-12 11:57:45 -0500
commit00d7c05ab168c10f9b520e07400923267bc04419 (patch)
tree5899743965a801e34e7dc6bfe59dba20ba023540 /kernel
parentcda315aba34ff4fb66bbb2945b723688f3414a75 (diff)
[PATCH] kprobes: no probes on critical path
For Kprobes critical path is the path from debug break exception handler till the control reaches kprobes exception code. No probes can be supported in this path as we will end up in recursion. This patch prevents this by moving the below function to safe __kprobes section onto which no probes can be inserted. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sys.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index bce933ebb29f..eecf84526afe 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -32,6 +32,7 @@
32 32
33#include <linux/compat.h> 33#include <linux/compat.h>
34#include <linux/syscalls.h> 34#include <linux/syscalls.h>
35#include <linux/kprobes.h>
35 36
36#include <asm/uaccess.h> 37#include <asm/uaccess.h>
37#include <asm/io.h> 38#include <asm/io.h>
@@ -168,7 +169,7 @@ EXPORT_SYMBOL(notifier_chain_unregister);
168 * of the last notifier function called. 169 * of the last notifier function called.
169 */ 170 */
170 171
171int notifier_call_chain(struct notifier_block **n, unsigned long val, void *v) 172int __kprobes notifier_call_chain(struct notifier_block **n, unsigned long val, void *v)
172{ 173{
173 int ret=NOTIFY_DONE; 174 int ret=NOTIFY_DONE;
174 struct notifier_block *nb = *n; 175 struct notifier_block *nb = *n;