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| author | Jason Wessel <jason.wessel@windriver.com> | 2010-05-20 21:04:25 -0500 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2010-05-20 21:04:25 -0500 |
| commit | f503b5ae53cb557ac351a668fcac1baab1cef0db (patch) | |
| tree | b2deb02cec90cb18a075b3a49e6de949db374c77 /kernel/debug | |
| parent | 98ec1878cacb393975cba64f7392eece81716cb4 (diff) | |
| download | blackbird-op-linux-f503b5ae53cb557ac351a668fcac1baab1cef0db.tar.gz blackbird-op-linux-f503b5ae53cb557ac351a668fcac1baab1cef0db.zip | |
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.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c index 88a83a225374..375e42f0baf0 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; |
