From 2c1d8fa18a8251c6627a654efcea3d9d99d0d5f8 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Mon, 29 Apr 2019 19:06:10 -0400
Subject: [PATCH] Adds a check for instruction privilege violation, albeit that
 I think I need different bus steps.

---
 .../68000/Implementation/68000Implementation.hpp   | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/Processors/68000/Implementation/68000Implementation.hpp b/Processors/68000/Implementation/68000Implementation.hpp
index 2b5cc3fd0..a69941654 100644
--- a/Processors/68000/Implementation/68000Implementation.hpp
+++ b/Processors/68000/Implementation/68000Implementation.hpp
@@ -150,8 +150,18 @@ template <class T, bool dtack_is_implicit, bool signal_will_perform> void Proces
 							}
 
 							if(instructions[decoded_instruction_].micro_operations) {
-								active_program_ = &instructions[decoded_instruction_];
-								active_micro_op_ = active_program_->micro_operations;
+								// Check for a privilege violation.
+								if(instructions[decoded_instruction_].requires_supervisor && !is_supervisor_) {
+									// TODO: this isn't the correct set of bus steps; this exception should
+									// push more informatio to the stack.
+									active_program_ = nullptr;
+									active_micro_op_ = exception_micro_ops_;
+									populate_trap_steps(8, get_status());
+								} else {
+									// Standard instruction dispatch.
+									active_program_ = &instructions[decoded_instruction_];
+									active_micro_op_ = active_program_->micro_operations;
+								}
 							} else {
 								active_program_ = nullptr;
 								active_micro_op_ = exception_micro_ops_;