Index: exec-all.h
===================================================================
RCS file: /cvsroot/qemu/qemu/exec-all.h,v
retrieving revision 1.34
diff -u -p -r1.34 exec-all.h
--- exec-all.h	24 Jul 2005 14:14:53 -0000	1.34
+++ exec-all.h	27 Jul 2005 20:53:43 -0000
@@ -607,6 +607,7 @@ int kqemu_init(CPUState *env);
 int kqemu_cpu_exec(CPUState *env);
 void kqemu_flush_page(CPUState *env, target_ulong addr);
 void kqemu_flush(CPUState *env, int global);
+void kqemu_cpu_interrupt(CPUState *env);
 
 static inline int kqemu_is_ok(CPUState *env)
 {
Index: kqemu.c
===================================================================
RCS file: /cvsroot/qemu/qemu/kqemu.c,v
retrieving revision 1.4
diff -u -p -r1.4 kqemu.c
--- kqemu.c	24 Apr 2005 18:03:37 -0000	1.4
+++ kqemu.c	27 Jul 2005 20:53:24 -0000
@@ -456,11 +456,14 @@ int kqemu_cpu_exec(CPUState *env)
     }
 
 #ifdef _WIN32
-    DeviceIoControl(kqemu_fd, KQEMU_EXEC,
-		    kenv, sizeof(struct kqemu_cpu_state),
-		    kenv, sizeof(struct kqemu_cpu_state),
-		    &temp, NULL);
-    ret = kenv->retval;
+    if (DeviceIoControl(kqemu_fd, KQEMU_EXEC,
+                        kenv, sizeof(struct kqemu_cpu_state),
+                        kenv, sizeof(struct kqemu_cpu_state),
+                        &temp, NULL)) {
+        ret = kenv->retval;
+    } else {
+        ret = -1;
+    }
 #else
 #if KQEMU_VERSION >= 0x010100
     ioctl(kqemu_fd, KQEMU_EXEC, kenv);
@@ -544,6 +547,15 @@ int kqemu_cpu_exec(CPUState *env)
         exit(1);
     }
     return 0;
+}
+
+void kqemu_cpu_interrupt(CPUState *env)
+{
+#if defined(_WIN32) && KQEMU_VERSION >= 0x010101
+    /* cancelling the I/O request causes KQEMU to finish executing the 
+       current block and successfully returning. */
+    CancelIo(kqemu_fd);
+#endif
 }
 
 #endif
Index: vl.c
===================================================================
RCS file: /cvsroot/qemu/qemu/vl.c,v
retrieving revision 1.133
diff -u -p -r1.133 vl.c
--- vl.c	24 Jul 2005 18:44:55 -0000	1.133
+++ vl.c	27 Jul 2005 20:54:26 -0000
@@ -875,6 +875,9 @@ static void host_alarm_handler(int host_
                            qemu_get_clock(rt_clock))) {
         /* stop the cpu because a timer occured */
         cpu_interrupt(global_env, CPU_INTERRUPT_EXIT);
+#ifdef USE_KQEMU
+        kqemu_cpu_interrupt(global_env);
+#endif
     }
 }