Merge GDB 7.5.1

gdb/i387-tdep.c

 /* Intel 387 floating point stuff.
 
    Copyright (C) 1988-1989, 1991-1994, 1998-2005, 2007-2012 Free
    Software Foundation, Inc.
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
@@ skipping 95 matching lines @@
         fputs_filtered (" Pseudo-denormal", file);
       else if (fraction[0] || fraction[1])
         /* Denormal.  */
         fputs_filtered (" Denormal", file);
     }
   else
     /* Unsupported.  */
     fputs_filtered (" Unsupported", file);
 }
 
-/* Print the status word STATUS.  */
+/* Print the status word STATUS.  If STATUS_P is false, then STATUS
+   was unavailable.  */
 
 static void
-print_i387_status_word (unsigned int status, struct ui_file *file)
+print_i387_status_word (int status_p,
+                        unsigned int status, struct ui_file *file)
 {
-  fprintf_filtered (file, "Status Word:         %s",
-                    hex_string_custom (status, 4));
+  fprintf_filtered (file, "Status Word:         ");
+  if (!status_p)
+    {
+      fprintf_filtered (file, "%s\n", _("<unavailable>"));
+      return;
+    }
+
+  fprintf_filtered (file, "%s", hex_string_custom (status, 4));
   fputs_filtered ("  ", file);
   fprintf_filtered (file, " %s", (status & 0x0001) ? "IE" : "  ");
   fprintf_filtered (file, " %s", (status & 0x0002) ? "DE" : "  ");
   fprintf_filtered (file, " %s", (status & 0x0004) ? "ZE" : "  ");
   fprintf_filtered (file, " %s", (status & 0x0008) ? "OE" : "  ");
   fprintf_filtered (file, " %s", (status & 0x0010) ? "UE" : "  ");
   fprintf_filtered (file, " %s", (status & 0x0020) ? "PE" : "  ");
   fputs_filtered ("  ", file);
   fprintf_filtered (file, " %s", (status & 0x0080) ? "ES" : "  ");
   fputs_filtered ("  ", file);
   fprintf_filtered (file, " %s", (status & 0x0040) ? "SF" : "  ");
   fputs_filtered ("  ", file);
   fprintf_filtered (file, " %s", (status & 0x0100) ? "C0" : "  ");
   fprintf_filtered (file, " %s", (status & 0x0200) ? "C1" : "  ");
   fprintf_filtered (file, " %s", (status & 0x0400) ? "C2" : "  ");
   fprintf_filtered (file, " %s", (status & 0x4000) ? "C3" : "  ");
 
   fputs_filtered ("\n", file);
 
   fprintf_filtered (file,
                     "                       TOP: %d\n", ((status >> 11) & 7));
 }
 
-/* Print the control word CONTROL.  */
+/* Print the control word CONTROL.  If CONTROL_P is false, then
+   CONTROL was unavailable.  */
 
 static void
-print_i387_control_word (unsigned int control, struct ui_file *file)
+print_i387_control_word (int control_p,
+                         unsigned int control, struct ui_file *file)
 {
-  fprintf_filtered (file, "Control Word:        %s",
-                    hex_string_custom (control, 4));
+  fprintf_filtered (file, "Control Word:        ");
+  if (!control_p)
+    {
+      fprintf_filtered (file, "%s\n", _("<unavailable>"));
+      return;
+    }
+
+  fprintf_filtered (file, "%s", hex_string_custom (control, 4));
   fputs_filtered ("  ", file);
   fprintf_filtered (file, " %s", (control & 0x0001) ? "IM" : "  ");
   fprintf_filtered (file, " %s", (control & 0x0002) ? "DM" : "  ");
   fprintf_filtered (file, " %s", (control & 0x0004) ? "ZM" : "  ");
   fprintf_filtered (file, " %s", (control & 0x0008) ? "OM" : "  ");
   fprintf_filtered (file, " %s", (control & 0x0010) ? "UM" : "  ");
   fprintf_filtered (file, " %s", (control & 0x0020) ? "PM" : "  ");
 
   fputs_filtered ("\n", file);
 
@@ skipping 32 matching lines @@
     }
 }
 
 /* Print out the i387 floating point state.  Note that we ignore FRAME
    in the code below.  That's OK since floating-point registers are
    never saved on the stack.  */
 
 void
 i387_print_float_info (struct gdbarch *gdbarch, struct ui_file *file,
                        struct frame_info *frame, const char *args)