Index: sys/cddl/dev/dtrace/mips/dtrace_asm.S
===================================================================
--- sys/cddl/dev/dtrace/mips/dtrace_asm.S
+++ sys/cddl/dev/dtrace/mips/dtrace_asm.S
@@ -37,8 +37,6 @@
 #include <machine/cpuregs.h>
 #include <machine/regnum.h>
 
-#include "assym.s"
-
         .set    noreorder               # Noreorder is default style!
 
 /*
Index: sys/cddl/dev/dtrace/mips/dtrace_subr.c
===================================================================
--- sys/cddl/dev/dtrace/mips/dtrace_subr.c
+++ sys/cddl/dev/dtrace/mips/dtrace_subr.c
@@ -50,6 +50,8 @@
 extern dtrace_id_t	dtrace_probeid_error;
 
 int dtrace_invop(uintptr_t, struct trapframe *, uintptr_t);
+void dtrace_invop_init(void);
+void dtrace_invop_uninit(void);
 
 typedef struct dtrace_invop_hdlr {
 	int (*dtih_func)(uintptr_t, struct trapframe *, uintptr_t);
Index: sys/cddl/dev/fbt/mips/fbt_isa.c
===================================================================
--- sys/cddl/dev/fbt/mips/fbt_isa.c
+++ sys/cddl/dev/fbt/mips/fbt_isa.c
@@ -82,7 +82,6 @@
     linker_symval_t *symval, void *opaque)
 {
 	fbt_probe_t *fbt, *retfbt;
-	uint32_t *target, *start;
 	uint32_t *instr, *limit;
 	const char *name;
 	char *modname;
Index: sys/mips/conf/ERL
===================================================================
--- sys/mips/conf/ERL
+++ sys/mips/conf/ERL
@@ -86,14 +86,15 @@
 options 	HWPMC_HOOKS		# Necessary kernel hooks for hwpmc(4)
 options 	AUDIT			# Security event auditing
 options 	MAC			# TrustedBSD MAC Framework
-#options 	KDTRACE_FRAME		# Ensure frames are compiled in
-#options 	KDTRACE_HOOKS		# Kernel DTrace hooks
-options 	INCLUDE_CONFIG_FILE     # Include this file in kernel
+options 	KDTRACE_FRAME		# Ensure frames are compiled in
+options 	KDTRACE_HOOKS		# Kernel DTrace hooks
+options 	DDB_CTF			# Kernel ELF linker loads CTF data
+options 	INCLUDE_CONFIG_FILE	# Include this file in kernel
 options 	TMPFS			# Temporary file system
 
 # Debugging for use in -current
 #options 	KDB			# Enable kernel debugger support.
-#options 	DDB			# Support DDB.
+options 	DDB			# Support DDB.
 #options 	GDB			# Support remote GDB.
 #options 	DEADLKRES		# Enable the deadlock resolver
 #options 	INVARIANTS		# Enable calls of extra sanity checking
Index: sys/modules/dtrace/Makefile
===================================================================
--- sys/modules/dtrace/Makefile
+++ sys/modules/dtrace/Makefile
@@ -22,11 +22,14 @@
 .if ${MACHINE_CPUARCH} == "powerpc"
 SUBDIR+=	fbt fasttrap
 .endif
-.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_ARCH} == "powerpc64"
+.if ${MACHINE_CPUARCH} == "amd64" || \
+    ${MACHINE_ARCH} == "mips64" || \
+    ${MACHINE_ARCH} == "powerpc64"
 SUBDIR+=	systrace_freebsd32
 .endif
 .if ${MACHINE_CPUARCH} == "aarch64" || \
     ${MACHINE_CPUARCH} == "arm" || \
+    ${MACHINE_CPUARCH} == "mips" || \
     ${MACHINE_CPUARCH} == "riscv"
 SUBDIR+=	fbt
 .endif
Index: sys/modules/dtrace/dtraceall/Makefile
===================================================================
--- sys/modules/dtrace/dtraceall/Makefile
+++ sys/modules/dtrace/dtraceall/Makefile
@@ -8,7 +8,7 @@
 CFLAGS+=	-I${SYSDIR}
 
 .if !defined(KERNBUILDDIR)
-.if ${MACHINE_ARCH} == "amd64"
+.if ${MACHINE_ARCH} == "amd64" || ${MACHINE_ARCH} == "mips64"
 opt_compat.h:
 	echo "#define COMPAT_FREEBSD32 1" >> ${.TARGET}
 .endif
Index: sys/modules/dtrace/dtraceall/dtraceall.c
===================================================================
--- sys/modules/dtrace/dtraceall/dtraceall.c
+++ sys/modules/dtrace/dtraceall/dtraceall.c
@@ -70,7 +70,8 @@
 MODULE_DEPEND(dtraceall, dtnfscl, 1, 1, 1);
 #endif
 #if defined(__aarch64__) || defined(__amd64__) || defined(__arm__) || \
-    defined(__i386__) || defined(__powerpc__) || defined(__riscv)
+    defined(__i386__) || defined(__mips__) || \
+    defined(__powerpc__) || defined(__riscv)
 MODULE_DEPEND(dtraceall, fbt, 1, 1, 1);
 #endif
 #if defined(__amd64__) || defined(__i386__)