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

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This commit is contained in:
Nick Clifton 2005-03-15 17:45:19 +00:00
parent f7945f452e
commit 7b4a0685e8
4 changed files with 82 additions and 19 deletions
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17
binutils/ChangeLog
View file

@ -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.

5
binutils/NEWS
View file

@ -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

19
binutils/doc/binutils.texi
View file

@ -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

34
binutils/objcopy.c
View file

@ -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;