K 10
svn:author
V 2
ed
K 8
svn:date
V 27
2017-11-24T13:51:59.093391Z
K 7
svn:log
V 569
Set CP15BEN in SCTLR to make memory barriers work in 32-bit mode.

Binaries generated by Clang for ARMv6 may contain these instructions:

  MCR p15, 0, <Rd>, c7, c10, 5

These instructions are deprecated as of ARMv7, which is why modern
processors have a way of toggling support for them. On FreeBSD/arm64 we
currently disable support for these instructions, meaning that if 32-bit
executables with these instructions are run, they would crash with
SIGILL. This is likely not what we want.

Reviewed by:	andrew
Differential Revision:	https://reviews.freebsd.org/D13145

END