John Baldwin 185250da23 Add support for cross double fault frames in stack traces:
- Populate the register values for the trapframe put on the stack by the
  double fault handler.
- Teach DDB's trace routine to treat a double fault like other trap frames.

MFC after:	3 days
2007-11-15 22:00:57 +00:00
..
2007-11-08 22:09:37 +00:00
2007-06-10 21:59:14 +00:00