X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gdb%2Fprintcmd.c;h=df44ff474a8c4ce1941ad80141c0c40336014246;hb=5aa03310cef09e8c41aaa05152d9570dfe62ba81;hp=f435f6dca6973ddaf1b811996a06306a9287e6ec;hpb=0df8b4180acb4890d058c92753dafcd4ff0a87d1;p=platform%2Fupstream%2Fbinutils.git

diff --git a/gdb/printcmd.c b/gdb/printcmd.c
index f435f6d..df44ff4 100644
--- a/gdb/printcmd.c
+++ b/gdb/printcmd.c
@@ -1,8 +1,6 @@
 /* Print values for GNU debugger GDB.
 
-   Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
-   1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
-   2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+   Copyright (C) 1986-2014 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -20,7 +18,6 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
-#include "gdb_string.h"
 #include "frame.h"
 #include "symtab.h"
 #include "gdbtypes.h"
@@ -32,38 +29,29 @@
 #include "target.h"
 #include "breakpoint.h"
 #include "demangle.h"
+#include "gdb-demangle.h"
 #include "valprint.h"
 #include "annotate.h"
 #include "symfile.h"		/* for overlay functions */
 #include "objfiles.h"		/* ditto */
 #include "completer.h"		/* for completion functions */
 #include "ui-out.h"
-#include "gdb_assert.h"
 #include "block.h"
 #include "disasm.h"
 #include "dfp.h"
-#include "valprint.h"
-#include "exceptions.h"
 #include "observer.h"
 #include "solist.h"
 #include "parser-defs.h"
 #include "charset.h"
 #include "arch-utils.h"
+#include "cli/cli-utils.h"
+#include "format.h"
+#include "source.h"
 
 #ifdef TUI
 #include "tui/tui.h"		/* For tui_active et al.   */
 #endif
 
-#if defined(__MINGW32__) && !defined(PRINTF_HAS_LONG_LONG)
-# define USE_PRINTF_I64 1
-# define PRINTF_HAS_LONG_LONG
-#else
-# define USE_PRINTF_I64 0
-#endif
-
-extern int asm_demangle;	/* Whether to demangle syms in asm
-				   printouts.  */
-
 struct format_data
   {
     int count;
@@ -128,10 +116,10 @@ show_print_symbol_filename (struct ui_file *file, int from_tty,
 }
 
 /* Number of auto-display expression currently being displayed.
-   So that we can disable it if we get an error or a signal within it.
+   So that we can disable it if we get a signal within it.
    -1 when not doing one.  */
 
-int current_display_number;
+static int current_display_number;
 
 struct display
   {
@@ -154,7 +142,7 @@ struct display
     struct program_space *pspace;
 
     /* Innermost block required by this expression when evaluated.  */
-    struct block *block;
+    const struct block *block;
 
     /* Status of this display (enabled or disabled).  */
     int enabled_p;
@@ -167,9 +155,19 @@ static struct display *display_chain;
 
 static int display_number;
 
-/* Prototypes for exported functions.  */
+/* Walk the following statement or block through all displays.
+   ALL_DISPLAYS_SAFE does so even if the statement deletes the current
+   display.  */
 
-void output_command (char *, int);
+#define ALL_DISPLAYS(B)				\
+  for (B = display_chain; B; B = B->next)
+
+#define ALL_DISPLAYS_SAFE(B,TMP)		\
+  for (B = display_chain;			\
+       B ? (TMP = B->next, 1): 0;		\
+       B = TMP)
+
+/* Prototypes for exported functions.  */
 
 void _initialize_printcmd (void);
 
@@ -189,10 +187,10 @@ static void do_one_display (struct display *);
    past the specification and past all whitespace following it.  */
 
 static struct format_data
-decode_format (char **string_ptr, int oformat, int osize)
+decode_format (const char **string_ptr, int oformat, int osize)
 {
   struct format_data val;
-  char *p = *string_ptr;
+  const char *p = *string_ptr;
 
   val.format = '?';
   val.size = '?';
@@ -327,10 +325,13 @@ print_formatted (struct value *val, int size,
       || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
     value_print (val, stream, options);
   else
-    /* User specified format, so don't look to the the type to
-       tell us what to do.  */
-    print_scalar_formatted (value_contents (val), type,
-			    options, size, stream);
+    /* User specified format, so don't look to the type to tell us
+       what to do.  */
+    val_print_scalar_formatted (type,
+				value_contents_for_printing (val),
+				value_embedded_offset (val),
+				val,
+				options, size, stream);
 }
 
 /* Return builtin floating point type of same length as TYPE.
@@ -340,24 +341,20 @@ float_type_from_length (struct type *type)
 {
   struct gdbarch *gdbarch = get_type_arch (type);
   const struct builtin_type *builtin = builtin_type (gdbarch);
-  unsigned int len = TYPE_LENGTH (type);
 
-  if (len == TYPE_LENGTH (builtin->builtin_float))
+  if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_float))
     type = builtin->builtin_float;
-  else if (len == TYPE_LENGTH (builtin->builtin_double))
+  else if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_double))
     type = builtin->builtin_double;
-  else if (len == TYPE_LENGTH (builtin->builtin_long_double))
+  else if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_long_double))
     type = builtin->builtin_long_double;
 
   return type;
 }
 
 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
-   according to OPTIONS and SIZE on STREAM.
-   Formats s and i are not supported at this level.
-
-   This is how the elements of an array or structure are printed
-   with a format.  */
+   according to OPTIONS and SIZE on STREAM.  Formats s and i are not
+   supported at this level.  */
 
 void
 print_scalar_formatted (const void *valaddr, struct type *type,
@@ -369,18 +366,8 @@ print_scalar_formatted (const void *valaddr, struct type *type,
   unsigned int len = TYPE_LENGTH (type);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
 
-  /* If we get here with a string format, try again without it.  Go
-     all the way back to the language printers, which may call us
-     again.  */
-  if (options->format == 's')
-    {
-      struct value_print_options opts = *options;
-      opts.format = 0;
-      opts.deref_ref = 0;
-      val_print (type, valaddr, 0, 0, stream, 0, NULL, &opts,
-		 current_language);
-      return;
-    }
+  /* String printing should go through val_print_scalar_formatted.  */
+  gdb_assert (options->format != 's');
 
   if (len > sizeof(LONGEST) &&
       (TYPE_CODE (type) == TYPE_CODE_INT
@@ -537,11 +524,15 @@ print_scalar_formatted (const void *valaddr, struct type *type,
 	    if (*cp == '\0')
 	      cp--;
 	  }
-	strcpy (buf, cp);
+	strncpy (buf, cp, sizeof (bits));
 	fputs_filtered (buf, stream);
       }
       break;
 
+    case 'z':
+      print_hex_chars (stream, valaddr, len, byte_order);
+      break;
+
     default:
       error (_("Undefined output format \"%c\"."), options->format);
     }
@@ -569,9 +560,10 @@ set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr)
    DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
    or to interpret it as a possible C++ name and convert it back to source
    form.  However note that DO_DEMANGLE can be overridden by the specific
-   settings of the demangle and asm_demangle variables.  */
+   settings of the demangle and asm_demangle variables.  Returns
+   non-zero if anything was printed; zero otherwise.  */
 
-void
+int
 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
 			struct ui_file *stream,
 			int do_demangle, char *leadin)
@@ -590,7 +582,7 @@ print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
 			      &filename, &line, &unmapped))
     {
       do_cleanups (cleanup_chain);
-      return;
+      return 0;
     }
 
   fputs_filtered (leadin, stream);
@@ -617,6 +609,7 @@ print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
     fputs_filtered (">", stream);
 
   do_cleanups (cleanup_chain);
+  return 1;
 }
 
 /* Given an address ADDR return all the elements needed to print the
@@ -635,11 +628,11 @@ build_address_symbolic (struct gdbarch *gdbarch,
 			int *line,       /* OUT */
 			int *unmapped)   /* OUT */
 {
-  struct minimal_symbol *msymbol;
+  struct bound_minimal_symbol msymbol;
   struct symbol *symbol;
   CORE_ADDR name_location = 0;
   struct obj_section *section = NULL;
-  char *name_temp = "";
+  const char *name_temp = "";
   
   /* Let's say it is mapped (not unmapped).  */
   *unmapped = 0;
@@ -684,21 +677,40 @@ build_address_symbolic (struct gdbarch *gdbarch,
 	name_temp = SYMBOL_LINKAGE_NAME (symbol);
     }
 
-  if (msymbol != NULL)
+  if (msymbol.minsym != NULL
+      && MSYMBOL_HAS_SIZE (msymbol.minsym)
+      && MSYMBOL_SIZE (msymbol.minsym) == 0
+      && MSYMBOL_TYPE (msymbol.minsym) != mst_text
+      && MSYMBOL_TYPE (msymbol.minsym) != mst_text_gnu_ifunc
+      && MSYMBOL_TYPE (msymbol.minsym) != mst_file_text)
+    msymbol.minsym = NULL;
+
+  if (msymbol.minsym != NULL)
     {
-      if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL)
+      if (BMSYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL)
 	{
+	  /* If this is a function (i.e. a code address), strip out any
+	     non-address bits.  For instance, display a pointer to the
+	     first instruction of a Thumb function as <function>; the
+	     second instruction will be <function+2>, even though the
+	     pointer is <function+3>.  This matches the ISA behavior.  */
+	  if (MSYMBOL_TYPE (msymbol.minsym) == mst_text
+	      || MSYMBOL_TYPE (msymbol.minsym) == mst_text_gnu_ifunc
+	      || MSYMBOL_TYPE (msymbol.minsym) == mst_file_text
+	      || MSYMBOL_TYPE (msymbol.minsym) == mst_solib_trampoline)
+	    addr = gdbarch_addr_bits_remove (gdbarch, addr);
+
 	  /* The msymbol is closer to the address than the symbol;
 	     use the msymbol instead.  */
 	  symbol = 0;
-	  name_location = SYMBOL_VALUE_ADDRESS (msymbol);
+	  name_location = BMSYMBOL_VALUE_ADDRESS (msymbol);
 	  if (do_demangle || asm_demangle)
-	    name_temp = SYMBOL_PRINT_NAME (msymbol);
+	    name_temp = MSYMBOL_PRINT_NAME (msymbol.minsym);
 	  else
-	    name_temp = SYMBOL_LINKAGE_NAME (msymbol);
+	    name_temp = MSYMBOL_LINKAGE_NAME (msymbol.minsym);
 	}
     }
-  if (symbol == NULL && msymbol == NULL)
+  if (symbol == NULL && msymbol.minsym == NULL)
     return 1;
 
   /* If the nearest symbol is too far away, don't print anything symbolic.  */
@@ -724,7 +736,7 @@ build_address_symbolic (struct gdbarch *gdbarch,
 
       if (sal.symtab)
 	{
-	  *filename = xstrdup (sal.symtab->filename);
+	  *filename = xstrdup (symtab_to_filename_for_display (sal.symtab));
 	  *line = sal.line;
 	}
     }
@@ -756,9 +768,7 @@ pc_prefix (CORE_ADDR addr)
       CORE_ADDR pc;
 
       frame = get_selected_frame (NULL);
-      pc = get_frame_pc (frame);
-
-      if (pc == addr)
+      if (get_frame_pc_if_available (frame, &pc) && pc == addr)
 	return "=> ";
     }
   return "   ";
@@ -766,29 +776,23 @@ pc_prefix (CORE_ADDR addr)
 
 /* Print address ADDR symbolically on STREAM.  Parameter DEMANGLE
    controls whether to print the symbolic name "raw" or demangled.
-   Global setting "addressprint" controls whether to print hex address
-   or not.  */
+   Return non-zero if anything was printed; zero otherwise.  */
 
-void
-print_address_demangle (struct gdbarch *gdbarch, CORE_ADDR addr,
+int
+print_address_demangle (const struct value_print_options *opts,
+			struct gdbarch *gdbarch, CORE_ADDR addr,
 			struct ui_file *stream, int do_demangle)
 {
-  struct value_print_options opts;
-
-  get_user_print_options (&opts);
-  if (addr == 0)
-    {
-      fprintf_filtered (stream, "0");
-    }
-  else if (opts.addressprint)
+  if (opts->addressprint)
     {
       fputs_filtered (paddress (gdbarch, addr), stream);
       print_address_symbolic (gdbarch, addr, stream, do_demangle, " ");
     }
   else
     {
-      print_address_symbolic (gdbarch, addr, stream, do_demangle, "");
+      return print_address_symbolic (gdbarch, addr, stream, do_demangle, "");
     }
+  return 1;
 }
 
 
@@ -940,14 +944,13 @@ validate_format (struct format_data fmt, char *cmdname)
    first argument ("/x myvar" for example, to print myvar in hex).  */
 
 static void
-print_command_1 (char *exp, int inspect, int voidprint)
+print_command_1 (const char *exp, int voidprint)
 {
   struct expression *expr;
-  struct cleanup *old_chain = 0;
+  struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
   char format = 0;
   struct value *val;
   struct format_data fmt;
-  int cleanup = 0;
 
   if (exp && *exp == '/')
     {
@@ -967,8 +970,7 @@ print_command_1 (char *exp, int inspect, int voidprint)
   if (exp && *exp)
     {
       expr = parse_expression (exp);
-      old_chain = make_cleanup (free_current_contents, &expr);
-      cleanup = 1;
+      make_cleanup (free_current_contents, &expr);
       val = evaluate_expression (expr);
     }
   else
@@ -980,64 +982,49 @@ print_command_1 (char *exp, int inspect, int voidprint)
       struct value_print_options opts;
       int histindex = record_latest_value (val);
 
-      if (histindex >= 0)
-	annotate_value_history_begin (histindex, value_type (val));
-      else
-	annotate_value_begin (value_type (val));
+      annotate_value_history_begin (histindex, value_type (val));
 
-      if (inspect)
-	printf_unfiltered ("\031(gdb-makebuffer \"%s\"  %d '(\"",
-			   exp, histindex);
-      else if (histindex >= 0)
-	printf_filtered ("$%d = ", histindex);
+      printf_filtered ("$%d = ", histindex);
 
-      if (histindex >= 0)
-	annotate_value_history_value ();
+      annotate_value_history_value ();
 
       get_formatted_print_options (&opts, format);
-      opts.inspect_it = inspect;
       opts.raw = fmt.raw;
 
       print_formatted (val, fmt.size, &opts, gdb_stdout);
       printf_filtered ("\n");
 
-      if (histindex >= 0)
-	annotate_value_history_end ();
-      else
-	annotate_value_end ();
-
-      if (inspect)
-	printf_unfiltered ("\") )\030");
+      annotate_value_history_end ();
     }
 
-  if (cleanup)
-    do_cleanups (old_chain);
+  do_cleanups (old_chain);
 }
 
 static void
 print_command (char *exp, int from_tty)
 {
-  print_command_1 (exp, 0, 1);
+  print_command_1 (exp, 1);
 }
 
-/* Same as print, except in epoch, it gets its own window.  */
+/* Same as print, except it doesn't print void results.  */
 static void
-inspect_command (char *exp, int from_tty)
+call_command (char *exp, int from_tty)
 {
-  extern int epoch_interface;
-
-  print_command_1 (exp, epoch_interface, 1);
+  print_command_1 (exp, 0);
 }
 
-/* Same as print, except it doesn't print void results.  */
+/* Implementation of the "output" command.  */
+
 static void
-call_command (char *exp, int from_tty)
+output_command (char *exp, int from_tty)
 {
-  print_command_1 (exp, 0, 0);
+  output_command_const (exp, from_tty);
 }
 
+/* Like output_command, but takes a const string as argument.  */
+
 void
-output_command (char *exp, int from_tty)
+output_command_const (const char *exp, int from_tty)
 {
   struct expression *expr;
   struct cleanup *old_chain;
@@ -1083,6 +1070,22 @@ set_command (char *exp, int from_tty)
   struct cleanup *old_chain =
     make_cleanup (free_current_contents, &expr);
 
+  if (expr->nelts >= 1)
+    switch (expr->elts[0].opcode)
+      {
+      case UNOP_PREINCREMENT:
+      case UNOP_POSTINCREMENT:
+      case UNOP_PREDECREMENT:
+      case UNOP_POSTDECREMENT:
+      case BINOP_ASSIGN:
+      case BINOP_ASSIGN_MODIFY:
+      case BINOP_COMMA:
+	break;
+      default:
+	warning
+	  (_("Expression is not an assignment (and might have no effect)"));
+      }
+
   evaluate_expression (expr);
   do_cleanups (old_chain);
 }
@@ -1112,17 +1115,18 @@ sym_info (char *arg, int from_tty)
 
     if (obj_section_addr (osect) <= sect_addr
 	&& sect_addr < obj_section_endaddr (osect)
-	&& (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, osect)))
+	&& (msymbol
+	    = lookup_minimal_symbol_by_pc_section (sect_addr, osect).minsym))
       {
 	const char *obj_name, *mapped, *sec_name, *msym_name;
 	char *loc_string;
 	struct cleanup *old_chain;
 
 	matches = 1;
-	offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol);
+	offset = sect_addr - MSYMBOL_VALUE_ADDRESS (objfile, msymbol);
 	mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped");
 	sec_name = osect->the_bfd_section->name;
-	msym_name = SYMBOL_PRINT_NAME (msymbol);
+	msym_name = MSYMBOL_PRINT_NAME (msymbol);
 
 	/* Don't print the offset if it is zero.
 	   We assume there's no need to handle i18n of "sym + offset".  */
@@ -1135,8 +1139,8 @@ sym_info (char *arg, int from_tty)
 	   a pagination request inside printf_filtered.  */
 	old_chain = make_cleanup (xfree, loc_string);
 
-	gdb_assert (osect->objfile && osect->objfile->name);
-	obj_name = osect->objfile->name;
+	gdb_assert (osect->objfile && objfile_name (osect->objfile));
+	obj_name = objfile_name (osect->objfile);
 
 	if (MULTI_OBJFILE_P ())
 	  if (pc_in_unmapped_range (addr, osect))
@@ -1185,12 +1189,11 @@ address_info (char *exp, int from_tty)
   struct gdbarch *gdbarch;
   int regno;
   struct symbol *sym;
-  struct minimal_symbol *msymbol;
+  struct bound_minimal_symbol msymbol;
   long val;
   struct obj_section *section;
   CORE_ADDR load_addr, context_pc = 0;
-  int is_a_field_of_this;	/* C++: lookup_symbol sets this to nonzero
-				   if exp is a field of `this'.  */
+  struct field_of_this_result is_a_field_of_this;
 
   if (exp == 0)
     error (_("Argument required."));
@@ -1199,7 +1202,7 @@ address_info (char *exp, int from_tty)
 		       &is_a_field_of_this);
   if (sym == NULL)
     {
-      if (is_a_field_of_this)
+      if (is_a_field_of_this.type != NULL)
 	{
 	  printf_filtered ("Symbol \"");
 	  fprintf_symbol_filtered (gdb_stdout, exp,
@@ -1212,12 +1215,14 @@ address_info (char *exp, int from_tty)
 	  return;
 	}
 
-      msymbol = lookup_minimal_symbol (exp, NULL, NULL);
+      msymbol = lookup_bound_minimal_symbol (exp);
 
-      if (msymbol != NULL)
+      if (msymbol.minsym != NULL)
 	{
-	  gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
-	  load_addr = SYMBOL_VALUE_ADDRESS (msymbol);
+	  struct objfile *objfile = msymbol.objfile;
+
+	  gdbarch = get_objfile_arch (objfile);
+	  load_addr = BMSYMBOL_VALUE_ADDRESS (msymbol);
 
 	  printf_filtered ("Symbol \"");
 	  fprintf_symbol_filtered (gdb_stdout, exp,
@@ -1225,7 +1230,7 @@ address_info (char *exp, int from_tty)
 	  printf_filtered ("\" is at ");
 	  fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
 	  printf_filtered (" in a file compiled without debugging");
-	  section = SYMBOL_OBJ_SECTION (msymbol);
+	  section = MSYMBOL_OBJ_SECTION (objfile, msymbol.minsym);
 	  if (section_is_overlay (section))
 	    {
 	      load_addr = overlay_unmapped_address (load_addr, section);
@@ -1246,9 +1251,17 @@ address_info (char *exp, int from_tty)
 			   current_language->la_language, DMGL_ANSI);
   printf_filtered ("\" is ");
   val = SYMBOL_VALUE (sym);
-  section = SYMBOL_OBJ_SECTION (sym);
+  section = SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym), sym);
   gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile);
 
+  if (SYMBOL_COMPUTED_OPS (sym) != NULL)
+    {
+      SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc,
+						    gdb_stdout);
+      printf_filtered (".\n");
+      return;
+    }
+
   switch (SYMBOL_CLASS (sym))
     {
     case LOC_CONST:
@@ -1271,14 +1284,7 @@ address_info (char *exp, int from_tty)
       break;
 
     case LOC_COMPUTED:
-      /* FIXME: cagney/2004-01-26: It should be possible to
-	 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
-	 Unfortunately DWARF 2 stores the frame-base (instead of the
-	 function) location in a function's symbol.  Oops!  For the
-	 moment enable this when/where applicable.  */
-      SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc,
-						    gdb_stdout);
-      break;
+      gdb_assert_not_reached (_("LOC_COMPUTED variable missing a method"));
 
     case LOC_REGISTER:
       /* GDBARCH is the architecture associated with the objfile the symbol
@@ -1350,22 +1356,22 @@ address_info (char *exp, int from_tty)
 
     case LOC_UNRESOLVED:
       {
-	struct minimal_symbol *msym;
+	struct bound_minimal_symbol msym;
 
-	msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL);
-	if (msym == NULL)
+	msym = lookup_minimal_symbol_and_objfile (SYMBOL_LINKAGE_NAME (sym));
+	if (msym.minsym == NULL)
 	  printf_filtered ("unresolved");
 	else
 	  {
-	    section = SYMBOL_OBJ_SECTION (msym);
-	    load_addr = SYMBOL_VALUE_ADDRESS (msym);
+	    section = MSYMBOL_OBJ_SECTION (msym.objfile, msym.minsym);
+	    load_addr = BMSYMBOL_VALUE_ADDRESS (msym);
 
 	    if (section
 		&& (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0)
 	      printf_filtered (_("a thread-local variable at offset %s "
 				 "in the thread-local storage for `%s'"),
 			       paddress (gdbarch, load_addr),
-			       section->objfile->name);
+			       objfile_name (section->objfile));
 	    else
 	      {
 		printf_filtered (_("static storage at address "));
@@ -1410,8 +1416,10 @@ x_command (char *exp, int from_tty)
 
   if (exp && *exp == '/')
     {
-      exp++;
-      fmt = decode_format (&exp, last_format, last_size);
+      const char *tmp = exp + 1;
+
+      fmt = decode_format (&tmp, last_format, last_size);
+      exp = (char *) tmp;
     }
 
   /* If we have an expression, evaluate it and use it as the address.  */
@@ -1481,12 +1489,13 @@ x_command (char *exp, int from_tty)
    Specify the expression.  */
 
 static void
-display_command (char *exp, int from_tty)
+display_command (char *arg, int from_tty)
 {
   struct format_data fmt;
   struct expression *expr;
   struct display *new;
   int display_it = 1;
+  const char *exp = arg;
 
 #if defined(TUI)
   /* NOTE: cagney/2003-02-13 The `tui_active' was previously
@@ -1535,7 +1544,7 @@ display_command (char *exp, int from_tty)
       new->enabled_p = 1;
       display_chain = new;
 
-      if (from_tty && target_has_execution)
+      if (from_tty)
 	do_one_display (new);
 
       dont_repeat ();
@@ -1565,71 +1574,89 @@ clear_displays (void)
     }
 }
 
-/* Delete the auto-display number NUM.  */
+/* Delete the auto-display DISPLAY.  */
 
 static void
-delete_display (int num)
+delete_display (struct display *display)
 {
-  struct display *d1, *d;
+  struct display *d;
 
-  if (!display_chain)
-    error (_("No display number %d."), num);
+  gdb_assert (display != NULL);
 
-  if (display_chain->number == num)
-    {
-      d1 = display_chain;
-      display_chain = d1->next;
-      free_display (d1);
-    }
-  else
-    for (d = display_chain;; d = d->next)
+  if (display_chain == display)
+    display_chain = display->next;
+
+  ALL_DISPLAYS (d)
+    if (d->next == display)
       {
-	if (d->next == 0)
-	  error (_("No display number %d."), num);
-	if (d->next->number == num)
-	  {
-	    d1 = d->next;
-	    d->next = d1->next;
-	    free_display (d1);
-	    break;
-	  }
+	d->next = display->next;
+	break;
       }
+
+  free_display (display);
 }
 
-/* Delete some values from the auto-display chain.
-   Specify the element numbers.  */
+/* Call FUNCTION on each of the displays whose numbers are given in
+   ARGS.  DATA is passed unmodified to FUNCTION.  */
 
 static void
-undisplay_command (char *args, int from_tty)
+map_display_numbers (char *args,
+		     void (*function) (struct display *,
+				       void *),
+		     void *data)
 {
-  char *p = args;
-  char *p1;
+  struct get_number_or_range_state state;
   int num;
 
-  if (args == 0)
+  if (args == NULL)
+    error_no_arg (_("one or more display numbers"));
+
+  init_number_or_range (&state, args);
+
+  while (!state.finished)
     {
-      if (query (_("Delete all auto-display expressions? ")))
-	clear_displays ();
-      dont_repeat ();
-      return;
+      const char *p = state.string;
+
+      num = get_number_or_range (&state);
+      if (num == 0)
+	warning (_("bad display number at or near '%s'"), p);
+      else
+	{
+	  struct display *d, *tmp;
+
+	  ALL_DISPLAYS_SAFE (d, tmp)
+	    if (d->number == num)
+	      break;
+	  if (d == NULL)
+	    printf_unfiltered (_("No display number %d.\n"), num);
+	  else
+	    function (d, data);
+	}
     }
+}
 
-  while (*p)
-    {
-      p1 = p;
-      while (*p1 >= '0' && *p1 <= '9')
-	p1++;
-      if (*p1 && *p1 != ' ' && *p1 != '\t')
-	error (_("Arguments must be display numbers."));
+/* Callback for map_display_numbers, that deletes a display.  */
 
-      num = atoi (p);
+static void
+do_delete_display (struct display *d, void *data)
+{
+  delete_display (d);
+}
 
-      delete_display (num);
+/* "undisplay" command.  */
 
-      p = p1;
-      while (*p == ' ' || *p == '\t')
-	p++;
+static void
+undisplay_command (char *args, int from_tty)
+{
+  if (args == NULL)
+    {
+      if (query (_("Delete all auto-display expressions? ")))
+	clear_displays ();
+      dont_repeat ();
+      return;
     }
+
+  map_display_numbers (args, do_delete_display, NULL);
   dont_repeat ();
 }
 
@@ -1640,6 +1667,7 @@ undisplay_command (char *args, int from_tty)
 static void
 do_one_display (struct display *d)
 {
+  struct cleanup *old_chain;
   int within_current_scope;
 
   if (d->enabled_p == 0)
@@ -1691,6 +1719,7 @@ do_one_display (struct display *d)
   if (!within_current_scope)
     return;
 
+  old_chain = make_cleanup_restore_integer (&current_display_number);
   current_display_number = d->number;
 
   annotate_display_begin ();
@@ -1699,8 +1728,7 @@ do_one_display (struct display *d)
   printf_filtered (": ");
   if (d->format.size)
     {
-      CORE_ADDR addr;
-      struct value *val;
+      volatile struct gdb_exception ex;
 
       annotate_display_format ();
 
@@ -1722,18 +1750,26 @@ do_one_display (struct display *d)
       else
 	printf_filtered ("  ");
 
-      val = evaluate_expression (d->exp);
-      addr = value_as_address (val);
-      if (d->format.format == 'i')
-	addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr);
-
       annotate_display_value ();
 
-      do_examine (d->format, d->exp->gdbarch, addr);
+      TRY_CATCH (ex, RETURN_MASK_ERROR)
+        {
+	  struct value *val;
+	  CORE_ADDR addr;
+
+	  val = evaluate_expression (d->exp);
+	  addr = value_as_address (val);
+	  if (d->format.format == 'i')
+	    addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr);
+	  do_examine (d->format, d->exp->gdbarch, addr);
+	}
+      if (ex.reason < 0)
+	fprintf_filtered (gdb_stdout, _("<error: %s>\n"), ex.message);
     }
   else
     {
       struct value_print_options opts;
+      volatile struct gdb_exception ex;
 
       annotate_display_format ();
 
@@ -1751,15 +1787,23 @@ do_one_display (struct display *d)
 
       get_formatted_print_options (&opts, d->format.format);
       opts.raw = d->format.raw;
-      print_formatted (evaluate_expression (d->exp),
-		       d->format.size, &opts, gdb_stdout);
+
+      TRY_CATCH (ex, RETURN_MASK_ERROR)
+        {
+	  struct value *val;
+
+	  val = evaluate_expression (d->exp);
+	  print_formatted (val, d->format.size, &opts, gdb_stdout);
+	}
+      if (ex.reason < 0)
+	fprintf_filtered (gdb_stdout, _("<error: %s>"), ex.message);
       printf_filtered ("\n");
     }
 
   annotate_display_end ();
 
   gdb_flush (gdb_stdout);
-  current_display_number = -1;
+  do_cleanups (old_chain);
 }
 
 /* Display all of the values on the auto-display chain which can be
@@ -1832,71 +1876,47 @@ Num Enb Expression\n"));
     }
 }
 
+/* Callback fo map_display_numbers, that enables or disables the
+   passed in display D.  */
+
 static void
-enable_display (char *args, int from_tty)
+do_enable_disable_display (struct display *d, void *data)
 {
-  char *p = args;
-  char *p1;
-  int num;
-  struct display *d;
+  d->enabled_p = *(int *) data;
+}
+
+/* Implamentation of both the "disable display" and "enable display"
+   commands.  ENABLE decides what to do.  */
 
-  if (p == 0)
+static void
+enable_disable_display_command (char *args, int from_tty, int enable)
+{
+  if (args == NULL)
     {
-      for (d = display_chain; d; d = d->next)
-	d->enabled_p = 1;
-    }
-  else
-    while (*p)
-      {
-	p1 = p;
-	while (*p1 >= '0' && *p1 <= '9')
-	  p1++;
-	if (*p1 && *p1 != ' ' && *p1 != '\t')
-	  error (_("Arguments must be display numbers."));
+      struct display *d;
 
-	num = atoi (p);
+      ALL_DISPLAYS (d)
+	d->enabled_p = enable;
+      return;
+    }
 
-	for (d = display_chain; d; d = d->next)
-	  if (d->number == num)
-	    {
-	      d->enabled_p = 1;
-	      goto win;
-	    }
-	printf_unfiltered (_("No display number %d.\n"), num);
-      win:
-	p = p1;
-	while (*p == ' ' || *p == '\t')
-	  p++;
-      }
+  map_display_numbers (args, do_enable_disable_display, &enable);
 }
 
+/* The "enable display" command.  */
+
 static void
-disable_display_command (char *args, int from_tty)
+enable_display_command (char *args, int from_tty)
 {
-  char *p = args;
-  char *p1;
-  struct display *d;
-
-  if (p == 0)
-    {
-      for (d = display_chain; d; d = d->next)
-	d->enabled_p = 0;
-    }
-  else
-    while (*p)
-      {
-	p1 = p;
-	while (*p1 >= '0' && *p1 <= '9')
-	  p1++;
-	if (*p1 && *p1 != ' ' && *p1 != '\t')
-	  error (_("Arguments must be display numbers."));
+  enable_disable_display_command (args, from_tty, 1);
+}
 
-	disable_display (atoi (p));
+/* The "disable display" command.  */
 
-	p = p1;
-	while (*p == ' ' || *p == '\t')
-	  p++;
-      }
+static void
+disable_display_command (char *args, int from_tty)
+{
+  enable_disable_display_command (args, from_tty, 0);
 }
 
 /* display_chain items point to blocks and expressions.  Some expressions in
@@ -1908,21 +1928,24 @@ disable_display_command (char *args, int from_tty)
    an item by re-parsing .exp_string field in the new execution context.  */
 
 static void
-clear_dangling_display_expressions (struct so_list *solib)
+clear_dangling_display_expressions (struct objfile *objfile)
 {
-  struct objfile *objfile = solib->objfile;
   struct display *d;
+  struct program_space *pspace;
 
   /* With no symbol file we cannot have a block or expression from it.  */
   if (objfile == NULL)
     return;
+  pspace = objfile->pspace;
   if (objfile->separate_debug_objfile_backlink)
-    objfile = objfile->separate_debug_objfile_backlink;
-  gdb_assert (objfile->pspace == solib->pspace);
+    {
+      objfile = objfile->separate_debug_objfile_backlink;
+      gdb_assert (objfile->pspace == pspace);
+    }
 
   for (d = display_chain; d != NULL; d = d->next)
     {
-      if (d->pspace != solib->pspace)
+      if (d->pspace != pspace)
 	continue;
 
       if (lookup_objfile_from_block (d->block) == objfile
@@ -1940,7 +1963,9 @@ clear_dangling_display_expressions (struct so_list *solib)
    struct symbol.  NAME is the name to print; if NULL then VAR's print
    name will be used.  STREAM is the ui_file on which to print the
    value.  INDENT specifies the number of indent levels to print
-   before printing the variable name.  */
+   before printing the variable name.
+
+   This function invalidates FRAME.  */
 
 void
 print_variable_and_value (const char *name, struct symbol *var,
@@ -1960,7 +1985,12 @@ print_variable_and_value (const char *name, struct symbol *var,
 
       val = read_var_value (var, frame);
       get_user_print_options (&opts);
+      opts.deref_ref = 1;
       common_val_print (val, stream, indent, &opts, current_language);
+
+      /* common_val_print invalidates FRAME when a pretty printer calls inferior
+	 function.  */
+      frame = NULL;
     }
   if (except.reason < 0)
     fprintf_filtered(stream, "<error reading variable %s (%s)>", name,
@@ -1968,345 +1998,296 @@ print_variable_and_value (const char *name, struct symbol *var,
   fprintf_filtered (stream, "\n");
 }
 
-/* printf "printf format string" ARG to STREAM.  */
+/* Subroutine of ui_printf to simplify it.
+   Print VALUE to STREAM using FORMAT.
+   VALUE is a C-style string on the target.  */
 
 static void
-ui_printf (char *arg, struct ui_file *stream)
+printf_c_string (struct ui_file *stream, const char *format,
+		 struct value *value)
 {
-  char *f = NULL;
-  char *s = arg;
-  char *string = NULL;
-  struct value **val_args;
-  char *substrings;
-  char *current_substring;
-  int nargs = 0;
-  int allocated_args = 20;
-  struct cleanup *old_cleanups;
+  gdb_byte *str;
+  CORE_ADDR tem;
+  int j;
 
-  val_args = xmalloc (allocated_args * sizeof (struct value *));
-  old_cleanups = make_cleanup (free_current_contents, &val_args);
+  tem = value_as_address (value);
 
-  if (s == 0)
-    error_no_arg (_("format-control string and values to print"));
+  /* This is a %s argument.  Find the length of the string.  */
+  for (j = 0;; j++)
+    {
+      gdb_byte c;
 
-  /* Skip white space before format string.  */
-  while (*s == ' ' || *s == '\t')
-    s++;
+      QUIT;
+      read_memory (tem + j, &c, 1);
+      if (c == 0)
+	break;
+    }
 
-  /* A format string should follow, enveloped in double quotes.  */
-  if (*s++ != '"')
-    error (_("Bad format string, missing '\"'."));
+  /* Copy the string contents into a string inside GDB.  */
+  str = (gdb_byte *) alloca (j + 1);
+  if (j != 0)
+    read_memory (tem, str, j);
+  str[j] = 0;
 
-  /* Parse the format-control string and copy it into the string STRING,
-     processing some kinds of escape sequence.  */
+  fprintf_filtered (stream, format, (char *) str);
+}
 
-  f = string = (char *) alloca (strlen (s) + 1);
+/* Subroutine of ui_printf to simplify it.
+   Print VALUE to STREAM using FORMAT.
+   VALUE is a wide C-style string on the target.  */
 
-  while (*s != '"')
+static void
+printf_wide_c_string (struct ui_file *stream, const char *format,
+		      struct value *value)
+{
+  gdb_byte *str;
+  CORE_ADDR tem;
+  int j;
+  struct gdbarch *gdbarch = get_type_arch (value_type (value));
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+  struct type *wctype = lookup_typename (current_language, gdbarch,
+					 "wchar_t", NULL, 0);
+  int wcwidth = TYPE_LENGTH (wctype);
+  gdb_byte *buf = alloca (wcwidth);
+  struct obstack output;
+  struct cleanup *inner_cleanup;
+
+  tem = value_as_address (value);
+
+  /* This is a %s argument.  Find the length of the string.  */
+  for (j = 0;; j += wcwidth)
     {
-      int c = *s++;
-      switch (c)
-	{
-	case '\0':
-	  error (_("Bad format string, non-terminated '\"'."));
+      QUIT;
+      read_memory (tem + j, buf, wcwidth);
+      if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0)
+	break;
+    }
 
-	case '\\':
-	  switch (c = *s++)
-	    {
-	    case '\\':
-	      *f++ = '\\';
-	      break;
-	    case 'a':
-	      *f++ = '\a';
-	      break;
-	    case 'b':
-	      *f++ = '\b';
-	      break;
-	    case 'f':
-	      *f++ = '\f';
-	      break;
-	    case 'n':
-	      *f++ = '\n';
-	      break;
-	    case 'r':
-	      *f++ = '\r';
-	      break;
-	    case 't':
-	      *f++ = '\t';
-	      break;
-	    case 'v':
-	      *f++ = '\v';
-	      break;
-	    case '"':
-	      *f++ = '"';
-	      break;
-	    default:
-	      /* ??? TODO: handle other escape sequences.  */
-	      error (_("Unrecognized escape character \\%c in format string."),
-		     c);
-	    }
-	  break;
+  /* Copy the string contents into a string inside GDB.  */
+  str = (gdb_byte *) alloca (j + wcwidth);
+  if (j != 0)
+    read_memory (tem, str, j);
+  memset (&str[j], 0, wcwidth);
 
-	default:
-	  *f++ = c;
+  obstack_init (&output);
+  inner_cleanup = make_cleanup_obstack_free (&output);
+
+  convert_between_encodings (target_wide_charset (gdbarch),
+			     host_charset (),
+			     str, j, wcwidth,
+			     &output, translit_char);
+  obstack_grow_str0 (&output, "");
+
+  fprintf_filtered (stream, format, obstack_base (&output));
+  do_cleanups (inner_cleanup);
+}
+
+/* Subroutine of ui_printf to simplify it.
+   Print VALUE, a decimal floating point value, to STREAM using FORMAT.  */
+
+static void
+printf_decfloat (struct ui_file *stream, const char *format,
+		 struct value *value)
+{
+  const gdb_byte *param_ptr = value_contents (value);
+
+#if defined (PRINTF_HAS_DECFLOAT)
+  /* If we have native support for Decimal floating
+     printing, handle it here.  */
+  fprintf_filtered (stream, format, param_ptr);
+#else
+  /* As a workaround until vasprintf has native support for DFP
+     we convert the DFP values to string and print them using
+     the %s format specifier.  */
+  const char *p;
+
+  /* Parameter data.  */
+  struct type *param_type = value_type (value);
+  struct gdbarch *gdbarch = get_type_arch (param_type);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+  /* DFP output data.  */
+  struct value *dfp_value = NULL;
+  gdb_byte *dfp_ptr;
+  int dfp_len = 16;
+  gdb_byte dec[16];
+  struct type *dfp_type = NULL;
+  char decstr[MAX_DECIMAL_STRING];
+
+  /* Points to the end of the string so that we can go back
+     and check for DFP length modifiers.  */
+  p = format + strlen (format);
+
+  /* Look for the float/double format specifier.  */
+  while (*p != 'f' && *p != 'e' && *p != 'E'
+	 && *p != 'g' && *p != 'G')
+    p--;
+
+  /* Search for the '%' char and extract the size and type of
+     the output decimal value based on its modifiers
+     (%Hf, %Df, %DDf).  */
+  while (*--p != '%')
+    {
+      if (*p == 'H')
+	{
+	  dfp_len = 4;
+	  dfp_type = builtin_type (gdbarch)->builtin_decfloat;
+	}
+      else if (*p == 'D' && *(p - 1) == 'D')
+	{
+	  dfp_len = 16;
+	  dfp_type = builtin_type (gdbarch)->builtin_declong;
+	  p--;
+	}
+      else
+	{
+	  dfp_len = 8;
+	  dfp_type = builtin_type (gdbarch)->builtin_decdouble;
 	}
     }
 
-  /* Skip over " and following space and comma.  */
-  s++;
-  *f++ = '\0';
-  while (*s == ' ' || *s == '\t')
-    s++;
+  /* Conversion between different DFP types.  */
+  if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT)
+    decimal_convert (param_ptr, TYPE_LENGTH (param_type),
+		     byte_order, dec, dfp_len, byte_order);
+  else
+    /* If this is a non-trivial conversion, just output 0.
+       A correct converted value can be displayed by explicitly
+       casting to a DFP type.  */
+    decimal_from_string (dec, dfp_len, byte_order, "0");
 
-  if (*s != ',' && *s != 0)
-    error (_("Invalid argument syntax"));
+  dfp_value = value_from_decfloat (dfp_type, dec);
 
-  if (*s == ',')
-    s++;
-  while (*s == ' ' || *s == '\t')
-    s++;
+  dfp_ptr = (gdb_byte *) value_contents (dfp_value);
 
-  /* Need extra space for the '\0's.  Doubling the size is sufficient.  */
-  substrings = alloca (strlen (string) * 2);
-  current_substring = substrings;
+  decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr);
 
-  {
-    /* Now scan the string for %-specs and see what kinds of args they want.
-       argclass[I] classifies the %-specs so we can give printf_filtered
-       something of the right size.  */
+  /* Print the DFP value.  */
+  fprintf_filtered (stream, "%s", decstr);
+#endif
+}
 
-    enum argclass
-      {
-	int_arg, long_arg, long_long_arg, ptr_arg,
-	string_arg, wide_string_arg, wide_char_arg,
-	double_arg, long_double_arg, decfloat_arg
-      };
-    enum argclass *argclass;
-    enum argclass this_argclass;
-    char *last_arg;
-    int nargs_wanted;
-    int i;
+/* Subroutine of ui_printf to simplify it.
+   Print VALUE, a target pointer, to STREAM using FORMAT.  */
 
-    argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass);
-    nargs_wanted = 0;
-    f = string;
-    last_arg = string;
-    while (*f)
-      if (*f++ == '%')
-	{
-	  int seen_hash = 0, seen_zero = 0, lcount = 0, seen_prec = 0;
-	  int seen_space = 0, seen_plus = 0;
-	  int seen_big_l = 0, seen_h = 0, seen_big_h = 0;
-	  int seen_big_d = 0, seen_double_big_d = 0;
-	  int bad = 0;
-
-	  /* Check the validity of the format specifier, and work
-	     out what argument it expects.  We only accept C89
-	     format strings, with the exception of long long (which
-	     we autoconf for).  */
-
-	  /* Skip over "%%".  */
-	  if (*f == '%')
-	    {
-	      f++;
-	      continue;
-	    }
+static void
+printf_pointer (struct ui_file *stream, const char *format,
+		struct value *value)
+{
+  /* We avoid the host's %p because pointers are too
+     likely to be the wrong size.  The only interesting
+     modifier for %p is a width; extract that, and then
+     handle %p as glibc would: %#x or a literal "(nil)".  */
+
+  const char *p;
+  char *fmt, *fmt_p;
+#ifdef PRINTF_HAS_LONG_LONG
+  long long val = value_as_long (value);
+#else
+  long val = value_as_long (value);
+#endif
 
-	  /* The first part of a format specifier is a set of flag
-	     characters.  */
-	  while (strchr ("0-+ #", *f))
-	    {
-	      if (*f == '#')
-		seen_hash = 1;
-	      else if (*f == '0')
-		seen_zero = 1;
-	      else if (*f == ' ')
-		seen_space = 1;
-	      else if (*f == '+')
-		seen_plus = 1;
-	      f++;
-	    }
+  fmt = alloca (strlen (format) + 5);
 
-	  /* The next part of a format specifier is a width.  */
-	  while (strchr ("0123456789", *f))
-	    f++;
+  /* Copy up to the leading %.  */
+  p = format;
+  fmt_p = fmt;
+  while (*p)
+    {
+      int is_percent = (*p == '%');
 
-	  /* The next part of a format specifier is a precision.  */
-	  if (*f == '.')
-	    {
-	      seen_prec = 1;
-	      f++;
-	      while (strchr ("0123456789", *f))
-		f++;
-	    }
+      *fmt_p++ = *p++;
+      if (is_percent)
+	{
+	  if (*p == '%')
+	    *fmt_p++ = *p++;
+	  else
+	    break;
+	}
+    }
 
-	  /* The next part of a format specifier is a length modifier.  */
-	  if (*f == 'h')
-	    {
-	      seen_h = 1;
-	      f++;
-	    }
-	  else if (*f == 'l')
-	    {
-	      f++;
-	      lcount++;
-	      if (*f == 'l')
-		{
-		  f++;
-		  lcount++;
-		}
-	    }
-	  else if (*f == 'L')
-	    {
-	      seen_big_l = 1;
-	      f++;
-	    }
-	  /* Decimal32 modifier.  */
-	  else if (*f == 'H')
-	    {
-	      seen_big_h = 1;
-	      f++;
-	    }
-	  /* Decimal64 and Decimal128 modifiers.  */
-	  else if (*f == 'D')
-	    {
-	      f++;
-
-	      /* Check for a Decimal128.  */
-	      if (*f == 'D')
-		{
-		  f++;
-		  seen_double_big_d = 1;
-		}
-	      else
-		seen_big_d = 1;
-	    }
+  if (val != 0)
+    *fmt_p++ = '#';
 
-	  switch (*f)
-	    {
-	    case 'u':
-	      if (seen_hash)
-		bad = 1;
-	      /* FALLTHROUGH */
-
-	    case 'o':
-	    case 'x':
-	    case 'X':
-	      if (seen_space || seen_plus)
-		bad = 1;
-	      /* FALLTHROUGH */
-
-	    case 'd':
-	    case 'i':
-	      if (lcount == 0)
-		this_argclass = int_arg;
-	      else if (lcount == 1)
-		this_argclass = long_arg;
-	      else
-		this_argclass = long_long_arg;
-
-	      if (seen_big_l)
-		bad = 1;
-	      break;
+  /* Copy any width.  */
+  while (*p >= '0' && *p < '9')
+    *fmt_p++ = *p++;
 
-	    case 'c':
-	      this_argclass = lcount == 0 ? int_arg : wide_char_arg;
-	      if (lcount > 1 || seen_h || seen_big_l)
-		bad = 1;
-	      if (seen_prec || seen_zero || seen_space || seen_plus)
-		bad = 1;
-	      break;
+  gdb_assert (*p == 'p' && *(p + 1) == '\0');
+  if (val != 0)
+    {
+#ifdef PRINTF_HAS_LONG_LONG
+      *fmt_p++ = 'l';
+#endif
+      *fmt_p++ = 'l';
+      *fmt_p++ = 'x';
+      *fmt_p++ = '\0';
+      fprintf_filtered (stream, fmt, val);
+    }
+  else
+    {
+      *fmt_p++ = 's';
+      *fmt_p++ = '\0';
+      fprintf_filtered (stream, fmt, "(nil)");
+    }
+}
 
-	    case 'p':
-	      this_argclass = ptr_arg;
-	      if (lcount || seen_h || seen_big_l)
-		bad = 1;
-	      if (seen_prec || seen_zero || seen_space || seen_plus)
-		bad = 1;
-	      break;
+/* printf "printf format string" ARG to STREAM.  */
 
-	    case 's':
-	      this_argclass = lcount == 0 ? string_arg : wide_string_arg;
-	      if (lcount > 1 || seen_h || seen_big_l)
-		bad = 1;
-	      if (seen_zero || seen_space || seen_plus)
-		bad = 1;
-	      break;
+static void
+ui_printf (const char *arg, struct ui_file *stream)
+{
+  struct format_piece *fpieces;
+  const char *s = arg;
+  struct value **val_args;
+  int allocated_args = 20;
+  struct cleanup *old_cleanups;
 
-	    case 'e':
-	    case 'f':
-	    case 'g':
-	    case 'E':
-	    case 'G':
-	      if (seen_big_h || seen_big_d || seen_double_big_d)
-		this_argclass = decfloat_arg;
-	      else if (seen_big_l)
-		this_argclass = long_double_arg;
-	      else
-		this_argclass = double_arg;
-
-	      if (lcount || seen_h)
-		bad = 1;
-	      break;
+  val_args = xmalloc (allocated_args * sizeof (struct value *));
+  old_cleanups = make_cleanup (free_current_contents, &val_args);
 
-	    case '*':
-	      error (_("`*' not supported for precision or width in printf"));
+  if (s == 0)
+    error_no_arg (_("format-control string and values to print"));
 
-	    case 'n':
-	      error (_("Format specifier `n' not supported in printf"));
+  s = skip_spaces_const (s);
 
-	    case '\0':
-	      error (_("Incomplete format specifier at end of format string"));
+  /* A format string should follow, enveloped in double quotes.  */
+  if (*s++ != '"')
+    error (_("Bad format string, missing '\"'."));
 
-	    default:
-	      error (_("Unrecognized format specifier '%c' in printf"), *f);
-	    }
+  fpieces = parse_format_string (&s);
 
-	  if (bad)
-	    error (_("Inappropriate modifiers to "
-		     "format specifier '%c' in printf"),
-		   *f);
+  make_cleanup (free_format_pieces_cleanup, &fpieces);
 
-	  f++;
+  if (*s++ != '"')
+    error (_("Bad format string, non-terminated '\"'."));
+  
+  s = skip_spaces_const (s);
 
-	  if (lcount > 1 && USE_PRINTF_I64)
-	    {
-	      /* Windows' printf does support long long, but not the usual way.
-		 Convert %lld to %I64d.  */
-	      int length_before_ll = f - last_arg - 1 - lcount;
-
-	      strncpy (current_substring, last_arg, length_before_ll);
-	      strcpy (current_substring + length_before_ll, "I64");
-	      current_substring[length_before_ll + 3] =
-		last_arg[length_before_ll + lcount];
-	      current_substring += length_before_ll + 4;
-	    }
-	  else if (this_argclass == wide_string_arg
-		   || this_argclass == wide_char_arg)
-	    {
-	      /* Convert %ls or %lc to %s.  */
-	      int length_before_ls = f - last_arg - 2;
+  if (*s != ',' && *s != 0)
+    error (_("Invalid argument syntax"));
 
-	      strncpy (current_substring, last_arg, length_before_ls);
-	      strcpy (current_substring + length_before_ls, "s");
-	      current_substring += length_before_ls + 2;
-	    }
-	  else
-	    {
-	      strncpy (current_substring, last_arg, f - last_arg);
-	      current_substring += f - last_arg;
-	    }
-	  *current_substring++ = '\0';
-	  last_arg = f;
-	  argclass[nargs_wanted++] = this_argclass;
-	}
+  if (*s == ',')
+    s++;
+  s = skip_spaces_const (s);
+
+  {
+    int nargs = 0;
+    int nargs_wanted;
+    int i, fr;
+    char *current_substring;
+
+    nargs_wanted = 0;
+    for (fr = 0; fpieces[fr].string != NULL; fr++)
+      if (fpieces[fr].argclass != literal_piece)
+	++nargs_wanted;
 
     /* Now, parse all arguments and evaluate them.
        Store the VALUEs in VAL_ARGS.  */
 
     while (*s != '\0')
       {
-	char *s1;
+	const char *s1;
 
 	if (nargs == allocated_args)
 	  val_args = (struct value **) xrealloc ((char *) val_args,
@@ -2325,84 +2306,17 @@ ui_printf (char *arg, struct ui_file *stream)
       error (_("Wrong number of arguments for specified format-string"));
 
     /* Now actually print them.  */
-    current_substring = substrings;
-    for (i = 0; i < nargs; i++)
+    i = 0;
+    for (fr = 0; fpieces[fr].string != NULL; fr++)
       {
-	switch (argclass[i])
+	current_substring = fpieces[fr].string;
+	switch (fpieces[fr].argclass)
 	  {
 	  case string_arg:
-	    {
-	      gdb_byte *str;
-	      CORE_ADDR tem;
-	      int j;
-
-	      tem = value_as_address (val_args[i]);
-
-	      /* This is a %s argument.  Find the length of the string.  */
-	      for (j = 0;; j++)
-		{
-		  gdb_byte c;
-
-		  QUIT;
-		  read_memory (tem + j, &c, 1);
-		  if (c == 0)
-		    break;
-		}
-
-	      /* Copy the string contents into a string inside GDB.  */
-	      str = (gdb_byte *) alloca (j + 1);
-	      if (j != 0)
-		read_memory (tem, str, j);
-	      str[j] = 0;
-
-              fprintf_filtered (stream, current_substring, (char *) str);
-	    }
+	    printf_c_string (stream, current_substring, val_args[i]);
 	    break;
 	  case wide_string_arg:
-	    {
-	      gdb_byte *str;
-	      CORE_ADDR tem;
-	      int j;
-	      struct gdbarch *gdbarch
-		= get_type_arch (value_type (val_args[i]));
-	      enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-	      struct type *wctype = lookup_typename (current_language, gdbarch,
-						     "wchar_t", NULL, 0);
-	      int wcwidth = TYPE_LENGTH (wctype);
-	      gdb_byte *buf = alloca (wcwidth);
-	      struct obstack output;
-	      struct cleanup *inner_cleanup;
-
-	      tem = value_as_address (val_args[i]);
-
-	      /* This is a %s argument.  Find the length of the string.  */
-	      for (j = 0;; j += wcwidth)
-		{
-		  QUIT;
-		  read_memory (tem + j, buf, wcwidth);
-		  if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0)
-		    break;
-		}
-
-	      /* Copy the string contents into a string inside GDB.  */
-	      str = (gdb_byte *) alloca (j + wcwidth);
-	      if (j != 0)
-		read_memory (tem, str, j);
-	      memset (&str[j], 0, wcwidth);
-
-	      obstack_init (&output);
-	      inner_cleanup = make_cleanup_obstack_free (&output);
-
-	      convert_between_encodings (target_wide_charset (gdbarch),
-					 host_charset (),
-					 str, j, wcwidth,
-					 &output, translit_char);
-	      obstack_grow_str0 (&output, "");
-
-	      fprintf_filtered (stream, current_substring,
-                                obstack_base (&output));
-	      do_cleanups (inner_cleanup);
-	    }
+	    printf_wide_c_string (stream, current_substring, val_args[i]);
 	    break;
 	  case wide_char_arg:
 	    {
@@ -2475,7 +2389,7 @@ ui_printf (char *arg, struct ui_file *stream)
 	    error (_("long double not supported in printf"));
 #endif
 	  case long_long_arg:
-#if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
+#ifdef PRINTF_HAS_LONG_LONG
 	    {
 	      long long val = value_as_long (val_args[i]);
 
@@ -2499,184 +2413,32 @@ ui_printf (char *arg, struct ui_file *stream)
               fprintf_filtered (stream, current_substring, val);
 	      break;
 	    }
-
 	  /* Handles decimal floating values.  */
-	case decfloat_arg:
-	    {
-	      const gdb_byte *param_ptr = value_contents (val_args[i]);
-
-#if defined (PRINTF_HAS_DECFLOAT)
-	      /* If we have native support for Decimal floating
-		 printing, handle it here.  */
-              fprintf_filtered (stream, current_substring, param_ptr);
-#else
-
-	      /* As a workaround until vasprintf has native support for DFP
-	       we convert the DFP values to string and print them using
-	       the %s format specifier.  */
-
-	      char *eos, *sos;
-	      int nnull_chars = 0;
-
-	      /* Parameter data.  */
-	      struct type *param_type = value_type (val_args[i]);
-	      unsigned int param_len = TYPE_LENGTH (param_type);
-	      struct gdbarch *gdbarch = get_type_arch (param_type);
-	      enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-
-	      /* DFP output data.  */
-	      struct value *dfp_value = NULL;
-	      gdb_byte *dfp_ptr;
-	      int dfp_len = 16;
-	      gdb_byte dec[16];
-	      struct type *dfp_type = NULL;
-	      char decstr[MAX_DECIMAL_STRING];
-
-	      /* Points to the end of the string so that we can go back
-		 and check for DFP length modifiers.  */
-	      eos = current_substring + strlen (current_substring);
-
-	      /* Look for the float/double format specifier.  */
-	      while (*eos != 'f' && *eos != 'e' && *eos != 'E'
-		     && *eos != 'g' && *eos != 'G')
-		  eos--;
-
-	      sos = eos;
-
-	      /* Search for the '%' char and extract the size and type of
-		 the output decimal value based on its modifiers
-		 (%Hf, %Df, %DDf).  */
-	      while (*--sos != '%')
-		{
-		  if (*sos == 'H')
-		    {
-		      dfp_len = 4;
-		      dfp_type = builtin_type (gdbarch)->builtin_decfloat;
-		    }
-		  else if (*sos == 'D' && *(sos - 1) == 'D')
-		    {
-		      dfp_len = 16;
-		      dfp_type = builtin_type (gdbarch)->builtin_declong;
-		      sos--;
-		    }
-		  else
-		    {
-		      dfp_len = 8;
-		      dfp_type = builtin_type (gdbarch)->builtin_decdouble;
-		    }
-		}
-
-	      /* Replace %Hf, %Df and %DDf with %s's.  */
-	      *++sos = 's';
-
-	      /* Go through the whole format string and pull the correct
-		 number of chars back to compensate for the change in the
-		 format specifier.  */
-	      while (nnull_chars < nargs - i)
-		{
-		  if (*eos == '\0')
-		    nnull_chars++;
-
-		  *++sos = *++eos;
-		}
-
-	      /* Conversion between different DFP types.  */
-	      if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT)
-		decimal_convert (param_ptr, param_len, byte_order,
-				 dec, dfp_len, byte_order);
-	      else
-		/* If this is a non-trivial conversion, just output 0.
-		   A correct converted value can be displayed by explicitly
-		   casting to a DFP type.  */
-		decimal_from_string (dec, dfp_len, byte_order, "0");
-
-	      dfp_value = value_from_decfloat (dfp_type, dec);
-
-	      dfp_ptr = (gdb_byte *) value_contents (dfp_value);
-
-	      decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr);
-
-	      /* Print the DFP value.  */
-              fprintf_filtered (stream, current_substring, decstr);
-
-	      break;
-#endif
-	    }
-
+	  case decfloat_arg:
+	    printf_decfloat (stream, current_substring, val_args[i]);
+	    break;
 	  case ptr_arg:
-	    {
-	      /* We avoid the host's %p because pointers are too
-		 likely to be the wrong size.  The only interesting
-		 modifier for %p is a width; extract that, and then
-		 handle %p as glibc would: %#x or a literal "(nil)".  */
-
-	      char *p, *fmt, *fmt_p;
-#if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
-	      long long val = value_as_long (val_args[i]);
-#else
-	      long val = value_as_long (val_args[i]);
-#endif
-
-	      fmt = alloca (strlen (current_substring) + 5);
-
-	      /* Copy up to the leading %.  */
-	      p = current_substring;
-	      fmt_p = fmt;
-	      while (*p)
-		{
-		  int is_percent = (*p == '%');
-
-		  *fmt_p++ = *p++;
-		  if (is_percent)
-		    {
-		      if (*p == '%')
-			*fmt_p++ = *p++;
-		      else
-			break;
-		    }
-		}
-
-	      if (val != 0)
-		*fmt_p++ = '#';
-
-	      /* Copy any width.  */
-	      while (*p >= '0' && *p < '9')
-		*fmt_p++ = *p++;
-
-	      gdb_assert (*p == 'p' && *(p + 1) == '\0');
-	      if (val != 0)
-		{
-#if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
-		  *fmt_p++ = 'l';
-#endif
-		  *fmt_p++ = 'l';
-		  *fmt_p++ = 'x';
-		  *fmt_p++ = '\0';
-                  fprintf_filtered (stream, fmt, val);
-		}
-	      else
-		{
-		  *fmt_p++ = 's';
-		  *fmt_p++ = '\0';
-                  fprintf_filtered (stream, fmt, "(nil)");
-		}
-
-	      break;
-	    }
+	    printf_pointer (stream, current_substring, val_args[i]);
+	    break;
+	  case literal_piece:
+	    /* Print a portion of the format string that has no
+	       directives.  Note that this will not include any
+	       ordinary %-specs, but it might include "%%".  That is
+	       why we use printf_filtered and not puts_filtered here.
+	       Also, we pass a dummy argument because some platforms
+	       have modified GCC to include -Wformat-security by
+	       default, which will warn here if there is no
+	       argument.  */
+	    fprintf_filtered (stream, current_substring, 0);
+	    break;
 	  default:
 	    internal_error (__FILE__, __LINE__,
 			    _("failed internal consistency check"));
 	  }
-	/* Skip to the next substring.  */
-	current_substring += strlen (current_substring) + 1;
+	/* Maybe advance to the next argument.  */
+	if (fpieces[fr].argclass != literal_piece)
+	  ++i;
       }
-    /* Print the portion of the format string after the last argument.
-       Note that this will not include any ordinary %-specs, but it
-       might include "%%".  That is why we use printf_filtered and not
-       puts_filtered here.  Also, we pass a dummy argument because
-       some platforms have modified GCC to include -Wformat-security
-       by default, which will warn here if there is no argument.  */
-    fprintf_filtered (stream, last_arg, 0);
   }
   do_cleanups (old_cleanups);
 }
@@ -2687,6 +2449,7 @@ static void
 printf_command (char *arg, int from_tty)
 {
   ui_printf (arg, gdb_stdout);
+  gdb_flush (gdb_stdout);
 }
 
 /* Implement the "eval" command.  */
@@ -2715,7 +2478,7 @@ _initialize_printcmd (void)
 
   current_display_number = -1;
 
-  observer_attach_solib_unloaded (clear_dangling_display_expressions);
+  observer_attach_free_objfile (clear_dangling_display_expressions);
 
   add_info ("address", address_info,
 	    _("Describe where symbol SYM is stored."));
@@ -2729,7 +2492,8 @@ Examine memory: x/FMT ADDRESS.\n\
 ADDRESS is an expression for the memory address to examine.\n\
 FMT is a repeat count followed by a format letter and a size letter.\n\
 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
-  t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
+  t(binary), f(float), a(address), i(instruction), c(char), s(string)\n\
+  and z(hex, zero padded on the left).\n\
 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
 The specified number of objects of the specified size are printed\n\
 according to the format.\n\n\
@@ -2762,7 +2526,7 @@ and examining is done as in the \"x\" command.\n\n\
 With no argument, display all currently requested auto-display expressions.\n\
 Use \"undisplay\" to cancel display requests previously made."));
 
-  add_cmd ("display", class_vars, enable_display, _("\
+  add_cmd ("display", class_vars, enable_display_command, _("\
 Enable some expressions to be displayed when program stops.\n\
 Arguments are the code numbers of the expressions to resume displaying.\n\
 No argument means enable all automatic-display expressions.\n\
@@ -2851,16 +2615,17 @@ EXP may be preceded with /FMT, where FMT is a format letter\n\
 but no count or size letter (see \"x\" command)."));
   set_cmd_completer (c, expression_completer);
   add_com_alias ("p", "print", class_vars, 1);
-
-  c = add_com ("inspect", class_vars, inspect_command, _("\
-Same as \"print\" command, except that if you are running in the epoch\n\
-environment, the value is printed in its own window."));
-  set_cmd_completer (c, expression_completer);
+  add_com_alias ("inspect", "print", class_vars, 1);
 
   add_setshow_uinteger_cmd ("max-symbolic-offset", no_class,
 			    &max_symbolic_offset, _("\
 Set the largest offset that will be printed in <symbol+1234> form."), _("\
-Show the largest offset that will be printed in <symbol+1234> form."), NULL,
+Show the largest offset that will be printed in <symbol+1234> form."), _("\
+Tell GDB to only display the symbolic form of an address if the\n\
+offset between the closest earlier symbol and the address is less than\n\
+the specified maximum offset.  The default is \"unlimited\", which tells GDB\n\
+to always print the symbolic form of an address if any symbol precedes\n\
+it.  Zero is equivalent to \"unlimited\"."),
 			    NULL,
 			    show_max_symbolic_offset,
 			    &setprintlist, &showprintlist);