powerpc,kgdb: Introduce low level trap catching

The only way the debugger can handle a trap in inside rcu_lock,
notify_die, or atomic_notifier_call_chain without a recursive fault is
to allow the kernel debugger to handle the exception first in
program_check_exception().

The other change here is to make sure that kgdb_handle_exception() is
called with correct parameters when catching an oops, because kdb
needs to know if the entry was an oops, single step, or breakpoint
exception.

[[email protected]: move debugger_bpt instead of #ifdef]

CC: Paul Mackerras <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
Acked-by: Benjamin Herrenschmidt <[email protected]>

0 files changed, 0 insertions, 0 deletions