From a87295e8df0923dab9857c1a340d23fe3278a336 Mon Sep 17 00:00:00 2001
From: pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Sat, 26 May 2007 15:09:38 +0000
Subject: M68k system mode semihosting.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2861 c046a42c-6fe2-441c-8c8c-71466251a162
---
 target-m68k/op_helper.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'target-m68k/op_helper.c')

diff --git a/target-m68k/op_helper.c b/target-m68k/op_helper.c
index 7455e31659..f5593eca0c 100644
--- a/target-m68k/op_helper.c
+++ b/target-m68k/op_helper.c
@@ -28,6 +28,8 @@ void do_interrupt(int is_hw)
 
 #else
 
+extern int semihosting_enabled;
+
 #define MMUSUFFIX _mmu
 #define GETPC() (__builtin_return_address(0))
 
@@ -104,6 +106,20 @@ void do_interrupt(int is_hw)
             /* Return from an exception.  */
             do_rte();
             return;
+        case EXCP_HALT_INSN:
+            if (semihosting_enabled
+                    && (env->sr & SR_S) != 0
+                    && (env->pc & 3) == 0
+                    && lduw_code(env->pc - 4) == 0x4e71
+                    && ldl_code(env->pc) == 0x4e7bf000) {
+                env->pc += 4;
+                do_m68k_semihosting(env, env->dregs[0]);
+                return;
+            }
+            env->halted = 1;
+            env->exception_index = EXCP_HLT;
+            cpu_loop_exit();
+            return;
         }
         if (env->exception_index >= EXCP_TRAP0
             && env->exception_index <= EXCP_TRAP15) {
-- 
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