From scottr@netbsd.org:

>Fix SunOS user trace trap handling, from Gordon.

diff --git a/sys/arch/mac68k/mac68k/trap.c b/sys/arch/mac68k/mac68k/trap.c
index cf916f7..9af660a 100644 (file)
--- a/sys/arch/mac68k/mac68k/trap.c
+++ b/sys/arch/mac68k/mac68k/trap.c
@@ -1,5 +1,5 @@
-/*     $OpenBSD: trap.c,v 1.9 1997/03/30 21:53:27 briggs Exp $ */
-/*     $NetBSD: trap.c,v 1.45 1997/01/20 04:30:05 scottr Exp $ */
+/*     $OpenBSD: trap.c,v 1.10 1997/04/08 02:53:27 gene Exp $  */
+/*     $NetBSD: trap.c,v 1.46 1997/04/07 22:54:44 scottr Exp $ */
 
 /*
  * Copyright (c) 1988 University of Utah.
@@ -462,13 +462,16 @@ copyfault:
        case T_TRAP15|T_USER:   /* Sun user trace trap */
 #ifdef COMPAT_SUNOS
                /*
-                * XXX This comment/code is not consistent XXX
-                * SunOS seems to use Trap #2 for some obscure 
-                * fpu operations.  So far, just ignore it, but
-                * DONT trap on it.. 
+                * SunOS uses Trap #2 for a "CPU cache flush"
+                * Just flush the on-chip caches and return.
+                * XXX - Too bad NetBSD uses trap 2...
                 */
-               if (p->p_emul == &emul_sunos)
-                       goto out;
+               if (p->p_emul == &emul_sunos) {
+                       ICIA();
+                       DCIU();
+                       /* get out fast */
+                       goto done;
+               }
 #endif
                frame.f_sr &= ~PSL_T;
                i = SIGTRAP;