Index: linux-user/signal.c
===================================================================
RCS file: /cvsroot/qemu/qemu/linux-user/signal.c,v
retrieving revision 1.24
diff -u -r1.24 signal.c
--- linux-user/signal.c	30 Sep 2004 22:04:13 -0000	1.24
+++ linux-user/signal.c	14 Oct 2004 15:57:50 -0000
@@ -349,12 +349,22 @@
     handler = k->sa._sa_handler;
     if (handler == TARGET_SIG_DFL) {
         /* default handler : ignore some signal. The other are fatal */
-        if (sig != TARGET_SIGCHLD && 
-            sig != TARGET_SIGURG && 
-            sig != TARGET_SIGWINCH) {
-            force_sig(sig);
-        } else {
+        switch (sig) {
+        case TARGET_SIGCHLD:
+        case TARGET_SIGCONT:
+        case TARGET_SIGURG:
+        case TARGET_SIGWINCH:
             return 0; /* indicate ignored */
+            break;
+
+        case TARGET_SIGTSTP:
+        case TARGET_SIGTTIN:
+        case TARGET_SIGTTOU:
+            kill(getpid(), SIGSTOP); /* stop */
+            break;
+
+        default:
+            force_sig(sig);
         }
     } else if (handler == TARGET_SIG_IGN) {
         /* ignore signal */