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authorJason Wessel <jason.wessel@windriver.com>2010-05-20 21:04:25 -0500
committerJason Wessel <jason.wessel@windriver.com>2010-05-20 21:04:25 -0500
commitf503b5ae53cb557ac351a668fcac1baab1cef0db (patch)
treeb2deb02cec90cb18a075b3a49e6de949db374c77 /kernel/debug
parent98ec1878cacb393975cba64f7392eece81716cb4 (diff)
downloadlinux-2.6.34-ux500-f503b5ae53cb557ac351a668fcac1baab1cef0db.tar.gz
x86,kgdb: Add low level debug hook
The only way the debugger can handle a trap in inside rcu_lock, notify_die, or atomic_notifier_call_chain without a triple fault is to have a low level "first opportunity handler" in the int3 exception handler. Generally this will be something the vast majority of folks will not need, but for those who need it, it is added as a kernel .config option called KGDB_LOW_LEVEL_TRAP. CC: Ingo Molnar <mingo@elte.hu> CC: Thomas Gleixner <tglx@linutronix.de> CC: H. Peter Anvin <hpa@zytor.com> CC: x86@kernel.org Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'kernel/debug')
-rw-r--r--kernel/debug/debug_core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index 88a83a22537..375e42f0baf 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -66,7 +66,7 @@ int kgdb_connected;
EXPORT_SYMBOL_GPL(kgdb_connected);
/* All the KGDB handlers are installed */
-static int kgdb_io_module_registered;
+int kgdb_io_module_registered;
/* Guard for recursive entry */
static int exception_level;