diff --git a/sys/cddl/dev/kinst/kinst.h b/sys/cddl/dev/kinst/kinst.h
--- a/sys/cddl/dev/kinst/kinst.h
+++ b/sys/cddl/dev/kinst/kinst.h
@@ -35,10 +35,20 @@
 	kinst_patchval_t	kp_patchval;
 	kinst_patchval_t	kp_savedval;
 	kinst_patchval_t	*kp_patchpoint;
+	uint8_t			*kp_tramp;
 
 	struct kinst_probe_md	kp_md;
 };
 
+struct kinst_cpu_state {
+	enum {
+		KINST_PROBE_ARMED,
+		KINST_PROBE_FIRED,
+	}			state;
+	struct kinst_probe	*kp;
+	uint64_t		status;
+};
+
 LIST_HEAD(kinst_probe_list, kinst_probe);
 
 extern struct kinst_probe_list	*kinst_probetab;
diff --git a/sys/cddl/dev/kinst/kinst.c b/sys/cddl/dev/kinst/kinst.c
--- a/sys/cddl/dev/kinst/kinst.c
+++ b/sys/cddl/dev/kinst/kinst.c
@@ -221,6 +221,9 @@
 	struct kinst_probe *kp = parg;
 
 	LIST_REMOVE(kp, kp_hashnext);
+#ifndef __amd64__
+	kinst_trampoline_dealloc(kp->kp_tramp);
+#endif
 	free(kp, M_KINST);
 }
 
diff --git a/sys/cddl/dev/kinst/trampoline.c b/sys/cddl/dev/kinst/trampoline.c
--- a/sys/cddl/dev/kinst/trampoline.c
+++ b/sys/cddl/dev/kinst/trampoline.c
@@ -49,8 +49,10 @@
     TAILQ_HEAD_INITIALIZER(kinst_trampchunks);
 static struct sx		kinst_tramp_sx;
 SX_SYSINIT(kinst_tramp_sx, &kinst_tramp_sx, "kinst tramp");
+#ifdef __amd64__
 static eventhandler_tag		kinst_thread_ctor_handler;
 static eventhandler_tag		kinst_thread_dtor_handler;
+#endif
 
 /*
  * Fill the trampolines with KINST_TRAMP_FILL_PATTERN so that the kernel will
@@ -220,6 +222,7 @@
 	sx_xunlock(&kinst_tramp_sx);
 }
 
+#ifdef __amd64__
 static void
 kinst_thread_ctor(void *arg __unused, struct thread *td)
 {
@@ -240,10 +243,12 @@
 	 */
 	kinst_trampoline_dealloc(tramp);
 }
+#endif
 
 int
 kinst_trampoline_init(void)
 {
+#ifdef __amd64__
 	struct proc *p;
 	struct thread *td;
 	void *tramp;
@@ -296,12 +301,21 @@
 out:
 	sx_xunlock(&kinst_tramp_sx);
 	sx_sunlock(&allproc_lock);
+#else
+	int error = 0;
+
+	sx_xlock(&kinst_tramp_sx);
+	TAILQ_INIT(&kinst_trampchunks);
+	sx_xunlock(&kinst_tramp_sx);
+#endif
+
 	return (error);
 }
 
 int
 kinst_trampoline_deinit(void)
 {
+#ifdef __amd64__
 	struct trampchunk *chunk, *tmp;
 	struct proc *p;
 	struct thread *td;
@@ -324,6 +338,14 @@
 	TAILQ_FOREACH_SAFE(chunk, &kinst_trampchunks, next, tmp)
 		kinst_trampchunk_free(chunk);
 	sx_xunlock(&kinst_tramp_sx);
+#else
+	struct trampchunk *chunk, *tmp;
+
+	sx_xlock(&kinst_tramp_sx);
+	TAILQ_FOREACH_SAFE(chunk, &kinst_trampchunks, next, tmp)
+		kinst_trampchunk_free(chunk);
+	sx_xunlock(&kinst_tramp_sx);
+#endif
 
 	return (0);
 }