dtrace/arm64: Fix copyout and copyoutstrHEADmain

Calling dtrace_copy and dtrace_copystr with the kaddr and uaddr
arguments inversed does not work with PAN. Rename them
dtrace_copyin_pan and dtrace_copyinstr_pan, respectively, and
implement dtrace_copyout_pan and dtrace_copyoutstr_pan.

Avoid excessive faulting by checkin DTrace's CPU flags. Implement the
trick from OpenSolaris/Illumos of only checking the flags when
crossing into a new page, altough more effectively by examining the
vaddr instead of the count.

Reviewed by:	markj
MFC after:	3 weeks
Differential Revision:	https://reviews.freebsd.org/D59449

0 files changed, 0 insertions, 0 deletions