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Index: head/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
===================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
+++ head/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
@@ -157,6 +157,10 @@
* /etc/system.
*/
int dtrace_destructive_disallow = 0;
+#ifndef illumos
+/* Positive logic version of dtrace_destructive_disallow for loader tunable */
+int dtrace_allow_destructive = 1;
+#endif
dtrace_optval_t dtrace_nonroot_maxsize = (16 * 1024 * 1024);
size_t dtrace_difo_maxsize = (256 * 1024);
dtrace_optval_t dtrace_dof_maxsize = (8 * 1024 * 1024);
Index: head/sys/cddl/dev/dtrace/dtrace_load.c
===================================================================
--- head/sys/cddl/dev/dtrace/dtrace_load.c
+++ head/sys/cddl/dev/dtrace/dtrace_load.c
@@ -52,6 +52,17 @@
int i;
#endif
+#ifndef illumos
+ /*
+ * DTrace uses negative logic for the destructive mode switch, so it
+ * is required to translate from the sysctl which uses positive logic.
+ */
+ if (dtrace_allow_destructive)
+ dtrace_destructive_disallow = 0;
+ else
+ dtrace_destructive_disallow = 1;
+#endif
+
/* Hook into the trap handler. */
dtrace_trap_func = dtrace_trap;
Index: head/sys/cddl/dev/dtrace/dtrace_sysctl.c
===================================================================
--- head/sys/cddl/dev/dtrace/dtrace_sysctl.c
+++ head/sys/cddl/dev/dtrace/dtrace_sysctl.c
@@ -92,3 +92,6 @@
SYSCTL_QUAD(_kern_dtrace, OID_AUTO, helper_actions_max, CTLFLAG_RW,
&dtrace_helper_actions_max, 0, "maximum number of allowed helper actions");
+
+SYSCTL_INT(_security_bsd, OID_AUTO, allow_destructive_dtrace, CTLFLAG_RDTUN,
+ &dtrace_allow_destructive, 1, "Allow destructive mode DTrace scripts");

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