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authorJason Wessel <jason.wessel@windriver.com>2010-05-20 21:04:27 -0500
committerJason Wessel <jason.wessel@windriver.com>2010-05-20 21:04:27 -0500
commit6d90634076200af035f1d9dcc8fc11acefd603e9 (patch)
treef56c723a28006df0425bf662c15e2a3503b9065a /kernel/debug
parentd37d39ae3b4a8f9a21114921fb344fe7cadb1abd (diff)
downloadlinux-2.6.34-ux500-6d90634076200af035f1d9dcc8fc11acefd603e9.tar.gz
debug_core,kdb: Allow the debug core to process a recursive debug entry
This allows kdb to debug a crash with in the kms code with a single level recursive re-entry. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'kernel/debug')
-rw-r--r--kernel/debug/debug_core.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index fff59019cca..b38bb25dbbb 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -445,6 +445,10 @@ static int kgdb_reenter_check(struct kgdb_state *ks)
}
printk(KERN_CRIT "KGDB: re-enter exception: ALL breakpoints killed\n");
+#ifdef CONFIG_KGDB_KDB
+ /* Allow kdb to debug itself one level */
+ return 0;
+#endif
dump_stack();
panic("Recursive entry to debugger");
@@ -489,6 +493,9 @@ acquirelock:
*/
atomic_inc(&cpu_in_kgdb[cpu]);
+ if (exception_level == 1)
+ goto cpu_master_loop;
+
/*
* CPU will loop if it is a slave or request to become a kgdb
* master cpu and acquire the kgdb_active lock: