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$NetBSD: patch-ad,v 1.2 2003/06/06 08:58:43 jtb Exp $
--- /dev/null
+++ config/netbsd/m68k.c
@@ -0,0 +1,25 @@
+/*
+ * coswitch for the m68k architecture
+ */
+
+int
+coswitch (int *old_cs, int *new_cs, int first)
+{
+ asm ("movl %a6@(8),%a0"); /* a0 = old */
+ asm ("movl %a6@(12),%a1"); /* a1 = new */
+ asm ("movl %a7,%a0@"); /* save sp in cstate[0] */
+ asm ("movl %a6,%a0@(4)"); /* save a6 (fp) in cstate[0] */
+ asm ("moveml #0x3cfc,%a0@(8)"); /* store d2-d7, a2-a6 in old->cstate */
+
+ if (first == 0) { /* this is first activation */
+ asm ("movl %a1@,%a7");
+ asm ("movl #0,%a6");
+ new_context (0, 0);
+ syserr ("new_context() returned in coswitch");
+ }
+ else {
+ asm ("movl %a1@,%a7"); /* restore sp */
+ asm ("movl %a1@(4),%a6"); /* restore fp */
+ asm ("moveml %a1@(8),#0x3cfc"); /* restore d2-d7, a2-a6 */
+ }
+}
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