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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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12
binutils/ChangeLog
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@ -1,3 +1,15 @@
2006-06-23 Richard Sandiford <richard@codesourcery.com>
* 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.
2006-06-23 Daniel Jacobowitz <dan@codesourcery.com>
* Makefile.am (ar_DEPENDENCIES, ranlib_DEPENDENCIES)

6
binutils/doc/binutils.texi
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@ -952,6 +952,7 @@ objcopy [@option{-F} @var{bfdname}|@option{--target=}@var{bfdname}]
[@option{-N} @var{symbolname}|@option{--strip-symbol=}@var{symbolname}]
[@option{--strip-unneeded-symbol=}@var{symbolname}]
[@option{-G} @var{symbolname}|@option{--keep-global-symbol=}@var{symbolname}]
[@option{--localize-hidden}]
[@option{-L} @var{symbolname}|@option{--localize-symbol=}@var{symbolname}]
[@option{--globalize-symbol=}@var{symbolname}]
[@option{-W} @var{symbolname}|@option{--weaken-symbol=}@var{symbolname}]
@ -1124,6 +1125,11 @@ Keep only symbol @var{symbolname} global. Make all other symbols local
to the file, so that they are not visible externally. This option may
be given more than once.
@item --localize-hidden
In an ELF object, mark all symbols that have hidden or internal visibility
as local. This option applies on top of symbol-specific localization options
such as @option{-L}.
@item -L @var{symbolname}
@itemx --localize-symbol=@var{symbolname}
Make symbol @var{symbolname} local to the file, so that it is not

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;

8
binutils/testsuite/ChangeLog
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@ -1,3 +1,11 @@
2006-06-23 Richard Sandiford <richard@codesourcery.com>
* 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.
2006-06-06 Paul Brook <paul@codesourcery.com>
* binutils-all/arm/objdump.exp: New file.

17
binutils/testsuite/binutils-all/localize-hidden-1.d Normal file
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@ -0,0 +1,17 @@
#PROG: objcopy
#readelf: --symbols
#objcopy: --localize-hidden
#name: --localize-hidden test 1
#...
.*: 0+1200 +0 +NOTYPE +LOCAL +HIDDEN +ABS +Lhidden
.*: 0+1300 +0 +NOTYPE +LOCAL +INTERNAL +ABS +Linternal
.*: 0+1400 +0 +NOTYPE +LOCAL +PROTECTED +ABS +Lprotected
.*: 0+1100 +0 +NOTYPE +LOCAL +DEFAULT +ABS +Ldefault
.*: 0+2200 +0 +NOTYPE +LOCAL +HIDDEN +ABS +Ghidden
.*: 0+2300 +0 +NOTYPE +LOCAL +INTERNAL +ABS +Ginternal
.*: 0+3200 +0 +NOTYPE +LOCAL +HIDDEN +ABS +Whidden
.*: 0+3300 +0 +NOTYPE +LOCAL +INTERNAL +ABS +Winternal
.*: 0+2100 +0 +NOTYPE +GLOBAL +DEFAULT +ABS +Gdefault
.*: 0+2400 +0 +NOTYPE +GLOBAL +PROTECTED +ABS +Gprotected
.*: 0+3100 +0 +NOTYPE +WEAK +DEFAULT +ABS +Wdefault
.*: 0+3400 +0 +NOTYPE +WEAK +PROTECTED +ABS +Wprotected

36
binutils/testsuite/binutils-all/localize-hidden-1.s Normal file
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@ -0,0 +1,36 @@
.globl Gdefault
.globl Ghidden
.globl Ginternal
.globl Gprotected
.weak Wdefault
.weak Whidden
.weak Winternal
.weak Wprotected
.hidden Lhidden
.hidden Ghidden
.hidden Whidden
.internal Linternal
.internal Ginternal
.internal Winternal
.protected Lprotected
.protected Gprotected
.protected Wprotected
.equ Ldefault, 0x1100
.equ Lhidden, 0x1200
.equ Linternal, 0x1300
.equ Lprotected, 0x1400
.equ Gdefault, 0x2100
.equ Ghidden, 0x2200
.equ Ginternal, 0x2300
.equ Gprotected, 0x2400
.equ Wdefault, 0x3100
.equ Whidden, 0x3200
.equ Winternal, 0x3300
.equ Wprotected, 0x3400

7
binutils/testsuite/binutils-all/localize-hidden-2.d Normal file
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@ -0,0 +1,7 @@
#PROG: objcopy
#nm: -n
#objcopy: --localize-hidden
#name: --localize-hidden test 2
#...
0+100 A G
#pass

2
binutils/testsuite/binutils-all/localize-hidden-2.s Normal file
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@ -0,0 +1,2 @@
.globl G
.equ G,0x100

5
binutils/testsuite/binutils-all/objcopy.exp
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@ -728,3 +728,8 @@ if [is_elf_format] {
run_dump_test "copy-2"
run_dump_test "copy-3"
if [is_elf_format] {
run_dump_test "localize-hidden-1"
}
run_dump_test "localize-hidden-2"