K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2016-12-23T03:27:11.077830Z
K 7
svn:log
V 399
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

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