Initial upstream version 9.4.3upstream/9.4.3

1 files changed, 25 insertions, 0 deletions

diff --git a/config/bsd/m68k.c b/config/bsd/m68k.c
new file mode 100644
index 0000000..077922b
--- /dev/null
+++ b/config/bsd/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 */
+	}
+}