1 files changed, 71 insertions, 0 deletions
diff --git a/libgloss/rs6000/mbx-outbyte.c b/libgloss/rs6000/mbx-outbyte.c
new file mode 100644
index 000000000..0ebf0c68a
--- /dev/null
+++ b/libgloss/rs6000/mbx-outbyte.c
@@ -0,0 +1,71 @@
+/*
+ * mbx-outbyte.c -- outbyte function for targets using the eppcbug monitor
+ *
+ * Copyright (c) 1998 Cygnus Support
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#include "ppc-asm.h"
+
+static int sendbyte(char c)
+{
+    struct {
+	unsigned clun;
+	unsigned dlun;
+	char     *data;
+	unsigned len;
+	unsigned rsrvd;
+	char     buf[4];
+    } ipb, *inpb;
+
+    struct {
+	int status;
+	int cnt;
+    } opb, *outpb;
+
+    inpb = &ipb;
+    outpb = &opb;
+
+    inpb->clun = 0;
+    inpb->dlun = 0;
+    inpb->data = ipb.buf;
+    inpb->len  = 1;
+    inpb->rsrvd = 0;
+    inpb->buf[0] = c;
+
+    asm volatile (
+        "mr  3,%0\n"
+        "mr  4,%1\n"
+        "li  10,0x201\n"
+	"sc"
+	: /* no outputs */
+	: "r" (inpb), "r" (outpb)
+	: "3", "4", "10"
+    );
+
+    return (outpb->status == 0 && outpb->cnt == 1);
+}
+
+#define GDB_QUOTE_OUTBYTES 1
+
+void outbyte(char c)
+{
+#ifdef GDB_QUOTE_OUTBYTES
+    /*
+     *  GDB monitor.c will echo characters quoted with ^O
+     */
+    while (!sendbyte('\017')) ;
+#endif
+    while (!sendbyte(c)) ;
+}
+
+