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-rw-r--r--kernel/kprobes.c34
1 files changed, 17 insertions, 17 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index ca4c22d78cfd..dae198b68e97 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -68,7 +68,7 @@ static struct hlist_head kprobe_table[KPROBE_TABLE_SIZE];
68static struct hlist_head kretprobe_inst_table[KPROBE_TABLE_SIZE]; 68static struct hlist_head kretprobe_inst_table[KPROBE_TABLE_SIZE];
69 69
70/* NOTE: change this value only with kprobe_mutex held */ 70/* NOTE: change this value only with kprobe_mutex held */
71static bool kprobe_enabled; 71static bool kprobes_all_disarmed;
72 72
73static DEFINE_MUTEX(kprobe_mutex); /* Protects kprobe_table */ 73static DEFINE_MUTEX(kprobe_mutex); /* Protects kprobe_table */
74static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL; 74static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL;
@@ -598,7 +598,7 @@ static int __kprobes register_aggr_kprobe(struct kprobe *old_p,
598 * If the old_p has gone, its breakpoint has been disarmed. 598 * If the old_p has gone, its breakpoint has been disarmed.
599 * We have to arm it again after preparing real kprobes. 599 * We have to arm it again after preparing real kprobes.
600 */ 600 */
601 if (kprobe_enabled) 601 if (!kprobes_all_disarmed)
602 arch_arm_kprobe(ap); 602 arch_arm_kprobe(ap);
603 } 603 }
604 604
@@ -709,7 +709,7 @@ int __kprobes register_kprobe(struct kprobe *p)
709 hlist_add_head_rcu(&p->hlist, 709 hlist_add_head_rcu(&p->hlist,
710 &kprobe_table[hash_ptr(p->addr, KPROBE_HASH_BITS)]); 710 &kprobe_table[hash_ptr(p->addr, KPROBE_HASH_BITS)]);
711 711
712 if (kprobe_enabled) 712 if (!kprobes_all_disarmed)
713 arch_arm_kprobe(p); 713 arch_arm_kprobe(p);
714 714
715out_unlock_text: 715out_unlock_text:
@@ -751,7 +751,7 @@ valid_p:
751 * enabled and not gone - otherwise, the breakpoint would 751 * enabled and not gone - otherwise, the breakpoint would
752 * already have been removed. We save on flushing icache. 752 * already have been removed. We save on flushing icache.
753 */ 753 */
754 if (kprobe_enabled && !kprobe_gone(old_p)) { 754 if (!kprobes_all_disarmed && !kprobe_gone(old_p)) {
755 mutex_lock(&text_mutex); 755 mutex_lock(&text_mutex);
756 arch_disarm_kprobe(p); 756 arch_disarm_kprobe(p);
757 mutex_unlock(&text_mutex); 757 mutex_unlock(&text_mutex);
@@ -1190,8 +1190,8 @@ static int __init init_kprobes(void)
1190 } 1190 }
1191 } 1191 }
1192 1192
1193 /* By default, kprobes are enabled */ 1193 /* By default, kprobes are armed */
1194 kprobe_enabled = true; 1194 kprobes_all_disarmed = false;
1195 1195
1196 err = arch_init_kprobes(); 1196 err = arch_init_kprobes();
1197 if (!err) 1197 if (!err)
@@ -1289,7 +1289,7 @@ static struct file_operations debugfs_kprobes_operations = {
1289 .release = seq_release, 1289 .release = seq_release,
1290}; 1290};
1291 1291
1292static void __kprobes enable_all_kprobes(void) 1292static void __kprobes arm_all_kprobes(void)
1293{ 1293{
1294 struct hlist_head *head; 1294 struct hlist_head *head;
1295 struct hlist_node *node; 1295 struct hlist_node *node;
@@ -1298,8 +1298,8 @@ static void __kprobes enable_all_kprobes(void)
1298 1298
1299 mutex_lock(&kprobe_mutex); 1299 mutex_lock(&kprobe_mutex);
1300 1300
1301 /* If kprobes are already enabled, just return */ 1301 /* If kprobes are armed, just return */
1302 if (kprobe_enabled) 1302 if (!kprobes_all_disarmed)
1303 goto already_enabled; 1303 goto already_enabled;
1304 1304
1305 mutex_lock(&text_mutex); 1305 mutex_lock(&text_mutex);
@@ -1311,7 +1311,7 @@ static void __kprobes enable_all_kprobes(void)
1311 } 1311 }
1312 mutex_unlock(&text_mutex); 1312 mutex_unlock(&text_mutex);
1313 1313
1314 kprobe_enabled = true; 1314 kprobes_all_disarmed = false;
1315 printk(KERN_INFO "Kprobes globally enabled\n"); 1315 printk(KERN_INFO "Kprobes globally enabled\n");
1316 1316
1317already_enabled: 1317already_enabled:
@@ -1319,7 +1319,7 @@ already_enabled:
1319 return; 1319 return;
1320} 1320}
1321 1321
1322static void __kprobes disable_all_kprobes(void) 1322static void __kprobes disarm_all_kprobes(void)
1323{ 1323{
1324 struct hlist_head *head; 1324 struct hlist_head *head;
1325 struct hlist_node *node; 1325 struct hlist_node *node;
@@ -1328,11 +1328,11 @@ static void __kprobes disable_all_kprobes(void)
1328 1328
1329 mutex_lock(&kprobe_mutex); 1329 mutex_lock(&kprobe_mutex);
1330 1330
1331 /* If kprobes are already disabled, just return */ 1331 /* If kprobes are already disarmed, just return */
1332 if (!kprobe_enabled) 1332 if (kprobes_all_disarmed)
1333 goto already_disabled; 1333 goto already_disabled;
1334 1334
1335 kprobe_enabled = false; 1335 kprobes_all_disarmed = true;
1336 printk(KERN_INFO "Kprobes globally disabled\n"); 1336 printk(KERN_INFO "Kprobes globally disabled\n");
1337 mutex_lock(&text_mutex); 1337 mutex_lock(&text_mutex);
1338 for (i = 0; i < KPROBE_TABLE_SIZE; i++) { 1338 for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
@@ -1364,7 +1364,7 @@ static ssize_t read_enabled_file_bool(struct file *file,
1364{ 1364{
1365 char buf[3]; 1365 char buf[3];
1366 1366
1367 if (kprobe_enabled) 1367 if (!kprobes_all_disarmed)
1368 buf[0] = '1'; 1368 buf[0] = '1';
1369 else 1369 else
1370 buf[0] = '0'; 1370 buf[0] = '0';
@@ -1387,12 +1387,12 @@ static ssize_t write_enabled_file_bool(struct file *file,
1387 case 'y': 1387 case 'y':
1388 case 'Y': 1388 case 'Y':
1389 case '1': 1389 case '1':
1390 enable_all_kprobes(); 1390 arm_all_kprobes();
1391 break; 1391 break;
1392 case 'n': 1392 case 'n':
1393 case 'N': 1393 case 'N':
1394 case '0': 1394 case '0':
1395 disable_all_kprobes(); 1395 disarm_all_kprobes();
1396 break; 1396 break;
1397 } 1397 }
1398 1398