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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 /include/linux
parent98ec1878cacb393975cba64f7392eece81716cb4 (diff)
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 'include/linux')
-rw-r--r--include/linux/kgdb.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
index 406f6f9286f..19d1b29a269 100644
--- a/include/linux/kgdb.h
+++ b/include/linux/kgdb.h
@@ -60,6 +60,7 @@ struct uart_port;
void kgdb_breakpoint(void);
extern int kgdb_connected;
+extern int kgdb_io_module_registered;
extern atomic_t kgdb_setting_breakpoint;
extern atomic_t kgdb_cpu_doing_single_step;