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diff --git a/lib/libomp/Makefile b/lib/libomp/Makefile
--- a/lib/libomp/Makefile
+++ b/lib/libomp/Makefile
@@ -1,4 +1,7 @@
+# z_Linux_asm.S is missing BTI support
+MK_BRANCH_PROTECTION=no
+
.include <bsd.compiler.mk>
SHLIB_NAME= libomp.so
diff --git a/share/mk/bsd.lib.mk b/share/mk/bsd.lib.mk
--- a/share/mk/bsd.lib.mk
+++ b/share/mk/bsd.lib.mk
@@ -97,6 +97,12 @@
.endif
# LLD sensibly defaults to -znoexecstack, so do the same for BFD
LDFLAGS.bfd+= -Wl,-znoexecstack
+.if ${MK_BRANCH_PROTECTION} != "no"
+CFLAGS+= -mbranch-protection=standard
+.if ${MACHINE_ARCH} == "aarch64" && defined(BTI_REPORT_ERROR)
+LDFLAGS+= -Wl,-zbti-report=error
+.endif
+.endif
# Initialize stack variables on function entry
.if ${OPT_INIT_ALL} != "none"
diff --git a/share/mk/bsd.opts.mk b/share/mk/bsd.opts.mk
--- a/share/mk/bsd.opts.mk
+++ b/share/mk/bsd.opts.mk
@@ -74,6 +74,7 @@
__DEFAULT_NO_OPTIONS = \
ASAN \
BIND_NOW \
+ BRANCH_PROTECTION \
CCACHE_BUILD \
CTF \
INSTALL_AS_USER \
@@ -102,6 +103,10 @@
__DEFAULT_YES_OPTIONS+=PIE
.endif
+.if ${MACHINE_CPUARCH} != "aarch64"
+BROKEN_OPTIONS+= BRANCH_PROTECTION
+.endif
+
__SINGLE_OPTIONS = \
INIT_ALL
diff --git a/share/mk/bsd.prog.mk b/share/mk/bsd.prog.mk
--- a/share/mk/bsd.prog.mk
+++ b/share/mk/bsd.prog.mk
@@ -69,6 +69,12 @@
.endif
# LLD sensibly defaults to -znoexecstack, so do the same for BFD
LDFLAGS.bfd+= -Wl,-znoexecstack
+.if ${MK_BRANCH_PROTECTION} != "no"
+CFLAGS+= -mbranch-protection=standard
+.if ${MACHINE_ARCH} == "aarch64" && defined(BTI_REPORT_ERROR)
+LDFLAGS+= -Wl,-zbti-report=error
+.endif
+.endif
# Initialize stack variables on function entry
.if ${OPT_INIT_ALL} != "none"
diff --git a/stand/Makefile.inc b/stand/Makefile.inc
--- a/stand/Makefile.inc
+++ b/stand/Makefile.inc
@@ -1,4 +1,7 @@
SUBDIR_PARALLEL= yes
+# Firmware may not be able to handle branch protection failures
+MK_BRANCH_PROTECTION= no
+
.include "defs.mk"
diff --git a/tools/build/options/WITHOUT_BRANCH_PROTECTION b/tools/build/options/WITHOUT_BRANCH_PROTECTION
new file mode 100644
--- /dev/null
+++ b/tools/build/options/WITHOUT_BRANCH_PROTECTION
@@ -0,0 +1 @@
+Build with branch protection disabled.
diff --git a/tools/build/options/WITH_BRANCH_PROTECTION b/tools/build/options/WITH_BRANCH_PROTECTION
new file mode 100644
--- /dev/null
+++ b/tools/build/options/WITH_BRANCH_PROTECTION
@@ -0,0 +1,4 @@
+Build with branch protection enabled.
+On arm64 enable the use of pointer authentication and
+branch target identification instructions on arm64.
+These can be used to help mitigate some exploit techniques.

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