jhb ca113df5a3 Teach DDB how to unwind across a kernel stack overflow.
Kernel stack overflows in MIPS call panic() directly from an assembly
handler after storing the interrupted context's registers in a
trapframe.  Rather than inferring the location of ra, sp, and pc from
the instruction stream, recognize the pc of a kernel stack overflow
and pull the registers from the trapframe.

Sponsored by:	DARPA / AFRL
2016-12-23 03:27:11 +00:00
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2016-02-11 06:19:32 +00:00
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