diff --git a/sys/kern/subr_module.c b/sys/kern/subr_module.c
--- a/sys/kern/subr_module.c
+++ b/sys/kern/subr_module.c
@@ -28,6 +28,9 @@
  * SUCH DAMAGE.
  */
 
+#include <sys/cdefs.h>
+#include "opt_ddb.h"
+
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/linker.h>
@@ -39,6 +42,10 @@
 #include <vm/vm.h>
 #include <vm/vm_extern.h>
 
+#ifdef DDB
+#include <ddb/ddb.h>
+#endif
+
 /*
  * Preloaded module support
  */
@@ -602,3 +609,16 @@
     CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
     NULL, 0, sysctl_preload_dump, "A",
     "pretty-print the bootloader metadata");
+
+#ifdef DDB
+DB_SHOW_COMMAND_FLAGS(preload, db_show_preload, DB_CMD_MEMSAFE)
+{
+	struct sbuf sb;
+	char buffer[128];
+
+	sbuf_new(&sb, buffer, sizeof(buffer), SBUF_FIXEDLEN);
+	sbuf_set_drain(&sb, sbuf_db_printf_drain, NULL);
+	preload_dump_internal(&sb);
+	sbuf_finish(&sb);
+}
+#endif
diff --git a/sys/kern/subr_prf.c b/sys/kern/subr_prf.c
--- a/sys/kern/subr_prf.c
+++ b/sys/kern/subr_prf.c
@@ -1336,3 +1336,12 @@
 
 	return (r);
 }
+
+#if defined(_KERNEL) && defined(DDB)
+int
+sbuf_db_printf_drain(void *arg __unused, const char *data, int len)
+{
+
+	return (db_printf("%.*s", len, data));
+}
+#endif
diff --git a/sys/kern/subr_witness.c b/sys/kern/subr_witness.c
--- a/sys/kern/subr_witness.c
+++ b/sys/kern/subr_witness.c
@@ -2800,12 +2800,6 @@
 }
 
 #ifdef DDB
-static int
-sbuf_db_printf_drain(void *arg __unused, const char *data, int len)
-{
-	return (db_printf("%.*s", len, data));
-}
-
 DB_SHOW_COMMAND_FLAGS(badstacks, db_witness_badstacks, DB_CMD_MEMSAFE)
 {
 	struct sbuf sb;
diff --git a/sys/sys/sbuf.h b/sys/sys/sbuf.h
--- a/sys/sys/sbuf.h
+++ b/sys/sys/sbuf.h
@@ -114,6 +114,9 @@
 struct sbuf	*sbuf_uionew(struct sbuf *, struct uio *, int *);
 int		 sbuf_bcopyin(struct sbuf *, const void *, size_t);
 int		 sbuf_copyin(struct sbuf *, const void *, size_t);
+#ifdef DDB
+int		 sbuf_db_printf_drain(void *arg, const char *data, int len);
+#endif
 #endif
 __END_DECLS