From 8398d52d6541d316fcd88c856b5a72bb9cce0534 Mon Sep 17 00:00:00 2001
From: Adrian Chadd <adrian@FreeBSD.org>
Date: Fri, 15 Oct 2021 20:15:15 -0700
Subject: [PATCH] arm: print out the undefined instruction upon an undefined
 instruction panic

It's SUPER useful to be able to see the actual undefined instruction
when we hit said undefined instruction.
---
 sys/arm/arm/undefined.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/arm/arm/undefined.c b/sys/arm/arm/undefined.c
index ef9e72c8916..4e9a5295d33 100644
--- a/sys/arm/arm/undefined.c
+++ b/sys/arm/arm/undefined.c
@@ -341,7 +341,8 @@ undefinedinstruction(struct trapframe *frame)
 			return;
 		}
 		else
-			panic("Undefined instruction in kernel.\n");
+			panic("Undefined instruction in kernel (0x%08x).\n",
+			    fault_instruction);
 	}
 
 	userret(td, frame);