K 10
svn:author
V 6
andrew
K 8
svn:date
V 27
2019-11-03T15:42:08.448261Z
K 7
svn:log
V 420
Add support for setting hardware breakpoints from ptrace on arm64.

Implement get/fill_dbregs on arm64. This is used by ptrace with the
PT_GETDBREGS and PT_SETDBREGS requests. It allows userspace to set hardware
breakpoints.

The struct dbreg is based on Linux to ease adding hardware breakpoint
support to debuggers.

Reviewed by:	jhb
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D22195

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