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* objcopy.c (localize_hidden): New variable.
	(OPTION_LOCALIZE_HIDDEN): New command_line_switch value.
	(copy_options): Add --localize-hidden.
	(copy_usage): Mention --localize-hidden.
	(is_hidden_symbol): New function.
	(filter_symbols): Handle localize_hidden.
	(copy_object): Call filter_symbols if localize_hidden.
	(copy_main): Handle OPTION_LOCALIZE_HIDDEN.
	* doc/binutils.texi (--localize-hidden): Document new option.

binutils/testsuite/
	* binutils-all/localize-hidden-1.s,
	* binutils-all/localize-hidden-1.d,
	* binutils-all/localize-hidden-2.s,
	* binutils-all/localize-hidden-2.d: New tests.
	* binutils-all/objcopy.exp: Run them.
This commit is contained in:
Richard Sandiford 2006-06-23 16:23:09 +00:00
parent 22a84b5580
commit d58c2e3acd
9 changed files with 124 additions and 1 deletions
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32
binutils/objcopy.c
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@ -190,6 +190,9 @@ static bfd_boolean remove_leading_char = FALSE;
/* Whether to permit wildcard in symbol comparison. */
static bfd_boolean wildcard = FALSE;
/* True if --localize-hidden is in effect. */
static bfd_boolean localize_hidden = FALSE;
/* List of symbols to strip, keep, localize, keep-global, weaken,
or redefine. */
static struct symlist *strip_specific_list = NULL;
@ -240,6 +243,7 @@ enum command_line_switch
OPTION_STRIP_UNNEEDED_SYMBOL,
OPTION_STRIP_UNNEEDED_SYMBOLS,
OPTION_KEEP_SYMBOLS,
OPTION_LOCALIZE_HIDDEN,
OPTION_LOCALIZE_SYMBOLS,
OPTION_GLOBALIZE_SYMBOL,
OPTION_GLOBALIZE_SYMBOLS,
@ -328,6 +332,7 @@ static struct option copy_options[] =
{"keep-global-symbols", required_argument, 0, OPTION_KEEPGLOBAL_SYMBOLS},
{"keep-symbol", required_argument, 0, 'K'},
{"keep-symbols", required_argument, 0, OPTION_KEEP_SYMBOLS},
{"localize-hidden", no_argument, 0, OPTION_LOCALIZE_HIDDEN},
{"localize-symbol", required_argument, 0, 'L'},
{"localize-symbols", required_argument, 0, OPTION_LOCALIZE_SYMBOLS},
{"no-adjust-warnings", no_argument, 0, OPTION_NO_CHANGE_WARNINGS},
@ -428,6 +433,7 @@ copy_usage (FILE *stream, int exit_status)
--only-keep-debug Strip everything but the debug information\n\
-K --keep-symbol <name> Do not strip symbol <name>\n\
--keep-file-symbols Do not strip file symbol(s)\n\
--localize-hidden Turn all ELF hidden symbols into locals\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\
@ -809,6 +815,24 @@ is_strip_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
return FALSE;
}
/* Return true if SYM is a hidden symbol. */
static bfd_boolean
is_hidden_symbol (asymbol *sym)
{
elf_symbol_type *elf_sym;
elf_sym = elf_symbol_from (sym->the_bfd, sym);
if (elf_sym != NULL)
switch (ELF_ST_VISIBILITY (elf_sym->internal_elf_sym.st_other))
{
case STV_HIDDEN:
case STV_INTERNAL:
return TRUE;
}
return FALSE;
}
/* Choose which symbol entries to copy; put the result in OSYMS.
We don't copy in place, because that confuses the relocs.
Return the number of symbols to print. */
@ -955,7 +979,8 @@ filter_symbols (bfd *abfd, bfd *obfd, asymbol **osyms,
&& (flags & (BSF_GLOBAL | BSF_WEAK))
&& (is_specified_symbol (name, localize_specific_list)
|| (keepglobal_specific_list != NULL
&& ! is_specified_symbol (name, keepglobal_specific_list))))
&& ! is_specified_symbol (name, keepglobal_specific_list))
|| (localize_hidden && is_hidden_symbol (sym))))
{
sym->flags &= ~ (BSF_GLOBAL | BSF_WEAK);
sym->flags |= BSF_LOCAL;
@ -1532,6 +1557,7 @@ copy_object (bfd *ibfd, bfd *obfd)
|| strip_symbols == STRIP_UNNEEDED
|| strip_symbols == STRIP_NONDEBUG
|| discard_locals != LOCALS_UNDEF
|| localize_hidden
|| strip_specific_list != NULL
|| keep_specific_list != NULL
|| localize_specific_list != NULL
@ -3064,6 +3090,10 @@ copy_main (int argc, char *argv[])
add_specific_symbols (optarg, &keep_specific_list);
break;
case OPTION_LOCALIZE_HIDDEN:
localize_hidden = TRUE;
break;
case OPTION_LOCALIZE_SYMBOLS:
add_specific_symbols (optarg, &localize_specific_list);
break;