kdb: core for kgdb back end (2 of 2)

[safe/jmp/linux-2.6] / kernel / kallsyms.c

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 13aff29..6f6d091 100644 (file)
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/seq_file.h>
 #include <linux/fs.h>
+#include <linux/kdb.h>
 #include <linux/err.h>
 #include <linux/proc_fs.h>
 #include <linux/sched.h>       /* for cond_resched */
@@ -516,6 +517,26 @@ static int kallsyms_open(struct inode *inode, struct file *file)
        return ret;
 }
 
+#ifdef CONFIG_KGDB_KDB
+const char *kdb_walk_kallsyms(loff_t *pos)
+{
+       static struct kallsym_iter kdb_walk_kallsyms_iter;
+       if (*pos == 0) {
+               memset(&kdb_walk_kallsyms_iter, 0,
+                      sizeof(kdb_walk_kallsyms_iter));
+               reset_iter(&kdb_walk_kallsyms_iter, 0);
+       }
+       while (1) {
+               if (!update_iter(&kdb_walk_kallsyms_iter, *pos))
+                       return NULL;
+               ++*pos;
+               /* Some debugging symbols have no name.  Ignore them. */
+               if (kdb_walk_kallsyms_iter.name[0])
+                       return kdb_walk_kallsyms_iter.name;
+       }
+}
+#endif /* CONFIG_KGDB_KDB */
+
 static const struct file_operations kallsyms_operations = {
        .open = kallsyms_open,
        .read = seq_read,