K 10
svn:author
V 8
jhibbits
K 8
svn:date
V 27
2017-09-17T20:07:20.731793Z
K 7
svn:log
V 305
Don't use a non-zero argument for __builtin_frame_address

__builtin_frame_address with a non-zero argument is unsafe and rejected by
newer gcc.  Since it doesn't seem to impact the stacktrace, don't bother
with gymnastics to unwind to a different frame for starting.

PR:		kern/220118
MFC after:	2 weeks

END