Add new switch --globalize-symbol to convert local symbols into globals.

binutils/ChangeLog

@@ -1,3 +1,20 @@
+2005-03-15  Daniel Marques  <marques@cs.cornell.edu>
+            Nick Clifton  <nickc@redhat.com>
+
+	* objcopy.c (globalize_specific_list): New linked list of symbols
+	to convert from local binding into global binding.
+	(command_line_switch): Add OPTION_GLOBALIZE_SYMBOL and
+	OPTION_GLOBALIZE_SYMBOLS.
+	(copy_options): Add "globalize-symbol" and "globalize-symbols".
+	(copy_usage): Document the new switches.
+	(filter_symbols): Convert defined local symbols mentioned on the
+	globalize_specific_list into global symbols.
+	(copy_object): Perform actions if the globalize_specific_list is
+	not empty.
+	(copy_main): Handle new switches.
+	* NEWS: Mention new feature.
+	* doc/binutils.texi: Document new switches.
+
 2005-03-15  Alan Modra  <amodra@bigpond.net.au>
 
 	* po/es.po: Commit new Spanish translation.

binutils/NEWS

@@ -1,5 +1,10 @@
 -*- text -*-
 
+* Add "--globalize-symbol <name>" and "--globalize-symbols <filename>" switches
+  to objcopy to convert local symbols into global symbols.
+
+Changes in 2.16:
+
 * objcopy recognizes two new options --strip-unneeded-symbol and
   --strip-unneeded-symbols, namely for use together with the wildcard
   matching the original --strip-symbol/--strip-symbols provided, but

binutils/doc/binutils.texi

@@ -30,7 +30,7 @@ END-INFO-DIR-ENTRY
 @ifinfo
 @c man begin COPYRIGHT
 Copyright @copyright{} 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
 
 Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.1
@@ -55,7 +55,7 @@ notice identical to this one except for the removal of this paragraph
 @c  "objdump", "nm", "size", "strings", "strip", "readelf" and "ranlib".
 @c
 @c Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-@c 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+@c 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
 @c 
 @c This text may be freely distributed under the terms of the GNU
 @c Free Documentation License.
@@ -81,7 +81,7 @@ notice identical to this one except for the removal of this paragraph
 
 @vskip 0pt plus 1filll
 Copyright @copyright{} 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
 
       Permission is granted to copy, distribute and/or modify this document
       under the terms of the GNU Free Documentation License, Version 1.1
@@ -950,6 +950,7 @@ objcopy [@option{-F} @var{bfdname}|@option{--target=}@var{bfdname}]
         [@option{--strip-unneeded-symbol=}@var{symbolname}]
         [@option{-G} @var{symbolname}|@option{--keep-global-symbol=}@var{symbolname}]
         [@option{-L} @var{symbolname}|@option{--localize-symbol=}@var{symbolname}]
+        [@option{--globalize-symbol=}@var{symbolname}]
         [@option{-W} @var{symbolname}|@option{--weaken-symbol=}@var{symbolname}]
         [@option{-w}|@option{--wildcard}]
         [@option{-x}|@option{--discard-all}]
@@ -982,6 +983,7 @@ objcopy [@option{-F} @var{bfdname}|@option{--target=}@var{bfdname}]
         [@option{--strip-unneeded-symbols=}@var{filename}]
         [@option{--keep-global-symbols=}@var{filename}]
         [@option{--localize-symbols=}@var{filename}]
+        [@option{--globalize-symbols=}@var{filename}]
         [@option{--weaken-symbols=}@var{filename}]
         [@option{--alt-machine-code=}@var{index}]
         [@option{--prefix-symbols=}@var{string}]
@@ -1127,6 +1129,11 @@ visible externally.  This option may be given more than once.
 @itemx --weaken-symbol=@var{symbolname}
 Make symbol @var{symbolname} weak. This option may be given more than once.
 
+@item --globalize-symbol=@var{symbolname}
+Give symbol @var{symbolname} global scoping so that it is visible
+outside of the file in which it is defined.  This option may be given
+more than once.
+
 @item -w
 @itemx --wildcard
 Permit regular expressions in @var{symbolname}s used in other command
@@ -1371,6 +1378,12 @@ Apply @option{--localize-symbol} option to each symbol listed in the file
 name per line.  Line comments may be introduced by the hash character.
 This option may be given more than once.
 
+@item --globalize-symbols=@var{filename}
+Apply @option{--globalize-symbol} option to each symbol listed in the file
+@var{filename}.  @var{filename} is simply a flat file, with one symbol
+name per line.  Line comments may be introduced by the hash character.
+This option may be given more than once.
+
 @item --weaken-symbols=@var{filename}
 Apply @option{--weaken-symbol} option to each symbol listed in the file
 @var{filename}.  @var{filename} is simply a flat file, with one symbol

binutils/objcopy.c

@@ -195,6 +195,7 @@ static struct symlist *strip_specific_list = NULL;
 static struct symlist *strip_unneeded_list = NULL;
 static struct symlist *keep_specific_list = NULL;
 static struct symlist *localize_specific_list = NULL;
+static struct symlist *globalize_specific_list = NULL;
 static struct symlist *keepglobal_specific_list = NULL;
 static struct symlist *weaken_specific_list = NULL;
 static struct redefine_node *redefine_sym_list = NULL;
@@ -236,6 +237,8 @@ enum command_line_switch
     OPTION_STRIP_UNNEEDED_SYMBOLS,
     OPTION_KEEP_SYMBOLS,
     OPTION_LOCALIZE_SYMBOLS,
+    OPTION_GLOBALIZE_SYMBOL,
+    OPTION_GLOBALIZE_SYMBOLS,
     OPTION_KEEPGLOBAL_SYMBOLS,
     OPTION_WEAKEN_SYMBOLS,
     OPTION_RENAME_SECTION,
@@ -306,6 +309,8 @@ static struct option copy_options[] =
   {"discard-locals", no_argument, 0, 'X'},
   {"format", required_argument, 0, 'F'}, /* Obsolete */
   {"gap-fill", required_argument, 0, OPTION_GAP_FILL},
+  {"globalize-symbol", required_argument, 0, OPTION_GLOBALIZE_SYMBOL},
+  {"globalize-symbols", required_argument, 0, OPTION_GLOBALIZE_SYMBOLS},
   {"help", no_argument, 0, 'h'},
   {"impure", no_argument, 0, OPTION_IMPURE},
   {"info", no_argument, 0, OPTION_FORMATS_INFO},
@@ -416,6 +421,7 @@ copy_usage (FILE *stream, int exit_status)
      --only-keep-debug             Strip everything but the debug information\n\
   -K --keep-symbol <name>          Only copy symbol <name>\n\
   -L --localize-symbol <name>      Force symbol <name> to be marked as a local\n\
+     --globalize-symbol <name>     Force symbol <name> to be marked as a global\n\
   -G --keep-global-symbol <name>   Localize all symbols except <name>\n\
   -W --weaken-symbol <name>        Force symbol <name> to be marked as a weak\n\
      --weaken                      Force all global symbols to be marked as weak\n\
@@ -456,6 +462,7 @@ copy_usage (FILE *stream, int exit_status)
                                      in <file>\n\
      --keep-symbols <file>         -K for all symbols listed in <file>\n\
      --localize-symbols <file>     -L for all symbols listed in <file>\n\
+     --globalize-symbols <file>    --globalize-symbol for all in <file>\n\
      --keep-global-symbols <file>  -G for all symbols listed in <file>\n\
      --weaken-symbols <file>       -W for all symbols listed in <file>\n\
      --alt-machine-code <index>    Use alternate machine code for output\n\
@@ -923,13 +930,17 @@ filter_symbols (bfd *abfd, bfd *obfd, asymbol **osyms,
       if (keep && is_strip_section (abfd, bfd_get_section (sym)))
 	keep = 0;
 
-      if (keep && (flags & BSF_GLOBAL) != 0
+      if (keep)
+	{
+	  if ((flags & BSF_GLOBAL) != 0
 	      && (weaken || is_specified_symbol (name, weaken_specific_list)))
 	    {
 	      sym->flags &= ~ BSF_GLOBAL;
 	      sym->flags |= BSF_WEAK;
 	    }
-      if (keep && !undefined && (flags & (BSF_GLOBAL | BSF_WEAK))
+
+	  if (!undefined
+	      && (flags & (BSF_GLOBAL | BSF_WEAK))
 	      && (is_specified_symbol (name, localize_specific_list)
 		  || (keepglobal_specific_list != NULL
 		      && ! is_specified_symbol (name, keepglobal_specific_list))))
@@ -938,9 +949,17 @@ filter_symbols (bfd *abfd, bfd *obfd, asymbol **osyms,
 	      sym->flags |= BSF_LOCAL;
 	    }
 
-      if (keep)
+	  if (!undefined
+	      && (flags & BSF_LOCAL) 
+	      && is_specified_symbol (name, globalize_specific_list))
+	    {
+	      sym->flags &= ~ BSF_LOCAL;
+	      sym->flags |= BSF_GLOBAL;
+	    }
+
 	  to[dst_count++] = sym;
 	}
+    }
 
   to[dst_count] = NULL;
 
@@ -1389,6 +1408,7 @@ copy_object (bfd *ibfd, bfd *obfd)
       || strip_specific_list != NULL
       || keep_specific_list != NULL
       || localize_specific_list != NULL
+      || globalize_specific_list != NULL
       || keepglobal_specific_list != NULL
       || weaken_specific_list != NULL
       || prefix_symbols_string
@@ -2548,6 +2568,10 @@ copy_main (int argc, char *argv[])
 	  add_specific_symbol (optarg, &localize_specific_list);
 	  break;
 
+	case OPTION_GLOBALIZE_SYMBOL:
+	  add_specific_symbol (optarg, &globalize_specific_list);
+	  break;
+
 	case 'G':
 	  add_specific_symbol (optarg, &keepglobal_specific_list);
 	  break;
@@ -2889,6 +2913,10 @@ copy_main (int argc, char *argv[])
 	  add_specific_symbols (optarg, &localize_specific_list);
 	  break;
 
+	case OPTION_GLOBALIZE_SYMBOLS:
+	  add_specific_symbols (optarg, &globalize_specific_list);
+	  break;
+
 	case OPTION_KEEPGLOBAL_SYMBOLS:
 	  add_specific_symbols (optarg, &keepglobal_specific_list);
 	  break;