return 0;
}
+/* Remove all symbols in given area from kprobe blacklist */
+static void kprobe_remove_area_blacklist(unsigned long start, unsigned long end)
+{
+ struct kprobe_blacklist_entry *ent, *n;
+
+ list_for_each_entry_safe(ent, n, &kprobe_blacklist, list) {
+ if (ent->start_addr < start || ent->start_addr >= end)
+ continue;
+ list_del(&ent->list);
+ kfree(ent);
+ }
+}
+
+static void kprobe_remove_ksym_blacklist(unsigned long entry)
+{
+ kprobe_remove_area_blacklist(entry, entry + 1);
+}
+
int __init __weak arch_populate_kprobe_blacklist(void)
{
return 0;
/* Symbols in __kprobes_text are blacklisted */
ret = kprobe_add_area_blacklist((unsigned long)__kprobes_text_start,
(unsigned long)__kprobes_text_end);
+ if (ret)
+ return ret;
+
+ /* Symbols in noinstr section are blacklisted */
+ ret = kprobe_add_area_blacklist((unsigned long)__noinstr_text_start,
+ (unsigned long)__noinstr_text_end);
return ret ? : arch_populate_kprobe_blacklist();
}
+static void add_module_kprobe_blacklist(struct module *mod)
+{
+ unsigned long start, end;
+ int i;
+
+ if (mod->kprobe_blacklist) {
+ for (i = 0; i < mod->num_kprobe_blacklist; i++)
+ kprobe_add_ksym_blacklist(mod->kprobe_blacklist[i]);
+ }
+
+ start = (unsigned long)mod->kprobes_text_start;
+ if (start) {
+ end = start + mod->kprobes_text_size;
+ kprobe_add_area_blacklist(start, end);
+ }
+
+ start = (unsigned long)mod->noinstr_text_start;
+ if (start) {
+ end = start + mod->noinstr_text_size;
+ kprobe_add_area_blacklist(start, end);
+ }
+}
+
+static void remove_module_kprobe_blacklist(struct module *mod)
+{
+ unsigned long start, end;
+ int i;
+
+ if (mod->kprobe_blacklist) {
+ for (i = 0; i < mod->num_kprobe_blacklist; i++)
+ kprobe_remove_ksym_blacklist(mod->kprobe_blacklist[i]);
+ }
+
+ start = (unsigned long)mod->kprobes_text_start;
+ if (start) {
+ end = start + mod->kprobes_text_size;
+ kprobe_remove_area_blacklist(start, end);
+ }
+
+ start = (unsigned long)mod->noinstr_text_start;
+ if (start) {
+ end = start + mod->noinstr_text_size;
+ kprobe_remove_area_blacklist(start, end);
+ }
+}
+
/* Module notifier call back, checking kprobes on the module */
static int kprobes_module_callback(struct notifier_block *nb,
unsigned long val, void *data)
unsigned int i;
int checkcore = (val == MODULE_STATE_GOING);
+ if (val == MODULE_STATE_COMING) {
+ mutex_lock(&kprobe_mutex);
+ add_module_kprobe_blacklist(mod);
+ mutex_unlock(&kprobe_mutex);
+ }
if (val != MODULE_STATE_GOING && val != MODULE_STATE_LIVE)
return NOTIFY_DONE;
kill_kprobe(p);
}
}
+ if (val == MODULE_STATE_GOING)
+ remove_module_kprobe_blacklist(mod);
mutex_unlock(&kprobe_mutex);
return NOTIFY_DONE;
}
return 0;
}
-static const struct seq_operations kprobes_seq_ops = {
+static const struct seq_operations kprobes_sops = {
.start = kprobe_seq_start,
.next = kprobe_seq_next,
.stop = kprobe_seq_stop,
.show = show_kprobe_addr
};
-static int kprobes_open(struct inode *inode, struct file *filp)
-{
- return seq_open(filp, &kprobes_seq_ops);
-}
-
-static const struct file_operations debugfs_kprobes_operations = {
- .open = kprobes_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
+DEFINE_SEQ_ATTRIBUTE(kprobes);
/* kprobes/blacklist -- shows which functions can not be probed */
static void *kprobe_blacklist_seq_start(struct seq_file *m, loff_t *pos)
{
+ mutex_lock(&kprobe_mutex);
return seq_list_start(&kprobe_blacklist, *pos);
}
return 0;
}
-static const struct seq_operations kprobe_blacklist_seq_ops = {
- .start = kprobe_blacklist_seq_start,
- .next = kprobe_blacklist_seq_next,
- .stop = kprobe_seq_stop, /* Reuse void function */
- .show = kprobe_blacklist_seq_show,
-};
-
-static int kprobe_blacklist_open(struct inode *inode, struct file *filp)
+static void kprobe_blacklist_seq_stop(struct seq_file *f, void *v)
{
- return seq_open(filp, &kprobe_blacklist_seq_ops);
+ mutex_unlock(&kprobe_mutex);
}
-static const struct file_operations debugfs_kprobe_blacklist_ops = {
- .open = kprobe_blacklist_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
+static const struct seq_operations kprobe_blacklist_sops = {
+ .start = kprobe_blacklist_seq_start,
+ .next = kprobe_blacklist_seq_next,
+ .stop = kprobe_blacklist_seq_stop,
+ .show = kprobe_blacklist_seq_show,
};
+DEFINE_SEQ_ATTRIBUTE(kprobe_blacklist);
static int arm_all_kprobes(void)
{
dir = debugfs_create_dir("kprobes", NULL);
- debugfs_create_file("list", 0400, dir, NULL,
- &debugfs_kprobes_operations);
+ debugfs_create_file("list", 0400, dir, NULL, &kprobes_fops);
debugfs_create_file("enabled", 0600, dir, &value, &fops_kp);
debugfs_create_file("blacklist", 0400, dir, NULL,
- &debugfs_kprobe_blacklist_ops);
+ &kprobe_blacklist_fops);
return 0;
}