K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2020-12-08T17:57:18.506682Z
K 7
svn:log
V 387
Stack unwinding robustness fixes for RISC-V.

- Push the kstack_contains check down into unwind_frame() so that it
  is honored by DDB and DTrace.

- Check that the trapframe for an exception frame is contained in the
  traced thread's kernel stack for DDB traces.

Reviewed by:	markj
Obtained from:	CheriBSD
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D27357

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