* sparcl-tdep.c: Cleanup serial error handling.

gdb/ChangeLog

@@ -1,3 +1,7 @@
+Mon Oct 16 11:27:06 1995  Stu Grossman  (grossman@cygnus.com)
+
+	* sparcl-tdep.c:  Cleanup serial error handling.
+
 Sun Oct 15 16:19:27 1995  Stan Shebs  <shebs@andros.cygnus.com>
 
 	* rs6000-tdep.c: Don't include a.out.h, improve some formatting.

gdb/sparcl-tdep.c

@@ -296,30 +296,39 @@ open_tty (name)
   return desc;
 }
 
+/* Read a single character from the remote end, masking it down to 7 bits. */
+
 static int
-send_resp (desc, c)
+readchar (desc, timeout)
      serial_t desc;
-     char c;
+     int timeout;
 {
-  int i;
+  int ch;
 
-  SERIAL_WRITE (desc, &c, 1);
-  i = SERIAL_READCHAR (desc, 2);
-
-  if (i >= 0)
-    return i;
+  ch = SERIAL_READCHAR (desc, timeout);
 
-  switch (i)
+  switch (ch)
     {
+    case SERIAL_EOF:
+      error ("SPARClite remote connection closed");
     case SERIAL_ERROR:
-      perror_with_name ("Remote communication error");
+      perror_with_name ("SPARClite communication error");
     case SERIAL_TIMEOUT:
-      error ("Remote timeout");
-    case SERIAL_EOF:
-      error ("Remote connection closed");
+      error ("SPARClite remote timeout");
+    default:
+      return ch;
     }
 }
 
+static int
+send_resp (desc, c)
+     serial_t desc;
+     char c;
+{
+  SERIAL_WRITE (desc, &c, 1);
+  return readchar (desc, 2);
+}
+
 static void
 close_tty (ignore)
      int ignore;
@@ -652,7 +661,7 @@ sparclite_serial_start (entry)
   store_unsigned_integer (buffer + 1, 4, entry);
 
   SERIAL_WRITE (remote_desc, buffer, 1 + 4);
-  i = SERIAL_READCHAR (remote_desc, 2);
+  i = readchar (remote_desc, 2);
   if (i != 0x55)
     error ("Can't start SparcLite.  Error code %d\n", i);
 }
@@ -684,9 +693,7 @@ sparclite_serial_write (from_bfd, from_sec, from_addr, to_addr, len)
     error ("Bad response from load command (0x%x)", i);
 
   SERIAL_WRITE (remote_desc, buffer, 4 + 4 + len);
-  i = SERIAL_READCHAR (remote_desc, 2);
-  if (i < 0)
-    error ("I/O error in serial code.  Return code %d\n", i);
+  i = readchar (remote_desc, 2);
 
   if (i != checksum)
     error ("Bad checksum from load command (0x%x)", i);