/* objcopy.c -- copy object file from input to output, optionally massaging it.
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004, 2005, 2006
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of GNU Binutils.
static bfd_boolean pad_to_set = FALSE;
static bfd_vma pad_to;
-/* Use alternate machine code? */
-static int use_alt_mach_code = 0;
+/* Use alternative machine code? */
+static unsigned long use_alt_mach_code = 0;
/* Output BFD flags user wants to set or clear */
static flagword bfd_flags_to_set;
/* 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;
static char *prefix_sections_string = 0;
static char *prefix_alloc_sections_string = 0;
+/* True if --extract-symbol was passed on the command line. */
+static bfd_boolean extract_symbol = FALSE;
+
/* 150 isn't special; it's just an arbitrary non-ASCII char value. */
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,
OPTION_READONLY_TEXT,
OPTION_WRITABLE_TEXT,
OPTION_PURE,
- OPTION_IMPURE
+ OPTION_IMPURE,
+ OPTION_EXTRACT_SYMBOL
};
/* Options to handle if running as "strip". */
{"debugging", no_argument, 0, OPTION_DEBUGGING},
{"discard-all", no_argument, 0, 'x'},
{"discard-locals", no_argument, 0, 'X'},
+ {"extract-symbol", no_argument, 0, OPTION_EXTRACT_SYMBOL},
{"format", required_argument, 0, 'F'}, /* Obsolete */
{"gap-fill", required_argument, 0, OPTION_GAP_FILL},
{"globalize-symbol", required_argument, 0, OPTION_GLOBALIZE_SYMBOL},
{"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},
Do not copy symbol <name> unless needed by\n\
relocations\n\
--only-keep-debug Strip everything but the debug information\n\
+ --extract-symbol Remove section contents but keep symbols\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\
--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\
+ --alt-machine-code <index> Use the target's <index>'th alternative machine\n\
--writable-text Mark the output text as writable\n\
--readonly-text Make the output text write protected\n\
--pure Mark the output file as demand paged\n\
--info List object formats & architectures supported\n\
"));
list_supported_targets (program_name, stream);
- if (exit_status == 0)
+ if (REPORT_BUGS_TO[0] && exit_status == 0)
fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
exit (exit_status);
}
"));
list_supported_targets (program_name, stream);
- if (exit_status == 0)
+ if (REPORT_BUGS_TO[0] && exit_status == 0)
fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
exit (exit_status);
}
size = get_file_size (filename);
if (size == 0)
- return;
+ {
+ status = 1;
+ return;
+ }
buffer = xmalloc (size + 2);
f = fopen (filename, FOPEN_RT);
return FALSE;
}
+/* Return a pointer to the symbol used as a signature for GROUP. */
+
+static asymbol *
+group_signature (asection *group)
+{
+ bfd *abfd = group->owner;
+ Elf_Internal_Shdr *ghdr;
+
+ if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
+ return NULL;
+
+ ghdr = &elf_section_data (group)->this_hdr;
+ if (ghdr->sh_link < elf_numsections (abfd))
+ {
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ Elf_Internal_Shdr *symhdr = elf_elfsections (abfd) [ghdr->sh_link];
+
+ if (symhdr->sh_type == SHT_SYMTAB
+ && ghdr->sh_info < symhdr->sh_size / bed->s->sizeof_sym)
+ return isympp[ghdr->sh_info - 1];
+ }
+ return NULL;
+}
+
/* See if a section is being removed. */
static bfd_boolean
return FALSE;
}
+ if ((bfd_get_section_flags (abfd, sec) & SEC_GROUP) != 0)
+ {
+ asymbol *gsym;
+ const char *gname;
+
+ /* PR binutils/3166
+ Group sections look like debugging sections but they are not.
+ (They have a non-zero size but they are not ALLOCated). */
+ if (strip_symbols == STRIP_NONDEBUG)
+ return TRUE;
+
+ /* PR binutils/3181
+ If we are going to strip the group signature symbol, then
+ strip the group section too. */
+ gsym = group_signature (sec);
+ if (gsym != NULL)
+ gname = gsym->name;
+ else
+ gname = sec->name;
+ if ((strip_symbols == STRIP_ALL
+ && !is_specified_symbol (gname, keep_specific_list))
+ || is_specified_symbol (gname, strip_specific_list))
+ return TRUE;
+ }
+
+ 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;
}
&& (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;
bfd_get_archive_filename (ibfd), bfd_get_target (ibfd),
bfd_get_filename (obfd), bfd_get_target (obfd));
- if (set_start_set)
- start = set_start;
+ if (extract_symbol)
+ start = 0;
else
- start = bfd_get_start_address (ibfd);
- start += change_start;
+ {
+ if (set_start_set)
+ start = set_start;
+ else
+ start = bfd_get_start_address (ibfd);
+ start += change_start;
+ }
/* Neither the start address nor the flags
need to be set for a core file. */
isympp = NULL;
osympp = NULL;
+ symsize = bfd_get_symtab_upper_bound (ibfd);
+ if (symsize < 0)
+ {
+ bfd_nonfatal (bfd_get_archive_filename (ibfd));
+ return FALSE;
+ }
+
+ osympp = isympp = xmalloc (symsize);
+ symcount = bfd_canonicalize_symtab (ibfd, isympp);
+ if (symcount < 0)
+ {
+ bfd_nonfatal (bfd_get_filename (ibfd));
+ return FALSE;
+ }
+
/* BFD mandates that all output sections be created and sizes set before
any output is done. Thus, we traverse all sections multiple times. */
bfd_map_over_sections (ibfd, setup_section, obfd);
/* Symbol filtering must happen after the output sections
have been created, but before their contents are set. */
dhandle = NULL;
- symsize = bfd_get_symtab_upper_bound (ibfd);
- if (symsize < 0)
- {
- bfd_nonfatal (bfd_get_archive_filename (ibfd));
- return FALSE;
- }
-
- osympp = isympp = xmalloc (symsize);
- symcount = bfd_canonicalize_symtab (ibfd, isympp);
- if (symcount < 0)
- {
- bfd_nonfatal (bfd_get_filename (ibfd));
- return FALSE;
- }
-
if (convert_debugging)
dhandle = read_debugging_info (ibfd, isympp, symcount);
|| 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
}
}
+ /* Do not copy backend data if --extract-symbol is passed; anything
+ that needs to look at the section contents will fail. */
+ if (extract_symbol)
+ return TRUE;
+
/* Allow the BFD backend to copy any private data it understands
from the input BFD to the output BFD. This is done last to
permit the routine to look at the filtered symbol table, which is
/* Switch to the alternate machine code. We have to do this at the
very end, because we only initialize the header when we create
the first section. */
- if (use_alt_mach_code != 0
- && ! bfd_alt_mach_code (obfd, use_alt_mach_code))
- non_fatal (_("unknown alternate machine code, ignored"));
+ if (use_alt_mach_code != 0)
+ {
+ if (! bfd_alt_mach_code (obfd, use_alt_mach_code))
+ {
+ non_fatal (_("this target does not support %lu alternative machine codes"),
+ use_alt_mach_code);
+ if (bfd_get_flavour (obfd) == bfd_target_elf_flavour)
+ {
+ non_fatal (_("treating that number as an absolute e_machine value instead"));
+ elf_elfheader (obfd)->e_machine = use_alt_mach_code;
+ }
+ else
+ non_fatal (_("ignoring the alternative value"));
+ }
+ }
return TRUE;
}
-#undef MKDIR
-#if defined (_WIN32) && !defined (__CYGWIN32__)
-#define MKDIR(DIR, MODE) mkdir (DIR)
-#else
-#define MKDIR(DIR, MODE) mkdir (DIR, MODE)
-#endif
-
/* Read each archive element in turn from IBFD, copy the
- contents to temp file, and keep the temp file handle. */
+ contents to temp file, and keep the temp file handle.
+ If 'force_output_target' is TRUE then make sure that
+ all elements in the new archive are of the type
+ 'output_target'. */
static void
-copy_archive (bfd *ibfd, bfd *obfd, const char *output_target)
+copy_archive (bfd *ibfd, bfd *obfd, const char *output_target,
+ bfd_boolean force_output_target)
{
struct name_list
{
} *list, *l;
bfd **ptr = &obfd->archive_head;
bfd *this_element;
- char *dir = make_tempname (bfd_get_filename (obfd));
+ char * dir;
/* Make a temp directory to hold the contents. */
- if (MKDIR (dir, 0700) != 0)
- fatal (_("cannot mkdir %s for archive copying (error: %s)"),
- dir, strerror (errno));
+ dir = make_tempdir (bfd_get_filename (obfd));
+ if (dir == NULL)
+ fatal (_("cannot create tempdir for archive copying (error: %s)"),
+ strerror (errno));
obfd->has_armap = ibfd->has_armap;
/* If the file already exists, make another temp dir. */
if (stat (output_name, &buf) >= 0)
{
- output_name = make_tempname (output_name);
- if (MKDIR (output_name, 0700) != 0)
- fatal (_("cannot mkdir %s for archive copying (error: %s)"),
- output_name, strerror (errno));
+ output_name = make_tempdir (output_name);
+ if (output_name == NULL)
+ fatal (_("cannot create tempdir for archive copying (error: %s)"),
+ strerror (errno));
l = xmalloc (sizeof (struct name_list));
l->name = output_name;
bfd_get_filename (this_element), (char *) 0);
}
- output_bfd = bfd_openw (output_name, output_target);
if (preserve_dates)
{
stat_status = bfd_stat_arch_elt (this_element, &buf);
l->obfd = NULL;
list = l;
- if (output_bfd == NULL)
- RETURN_NONFATAL (output_name);
-
if (bfd_check_format (this_element, bfd_object))
{
+ /* PR binutils/3110: Cope with archives
+ containing multiple target types. */
+ if (force_output_target)
+ output_bfd = bfd_openw (output_name, output_target);
+ else
+ output_bfd = bfd_openw (output_name, bfd_get_target (this_element));
+
+ if (output_bfd == NULL)
+ RETURN_NONFATAL (output_name);
+
delete = ! copy_object (this_element, output_bfd);
if (! delete
non_fatal (_("Unable to recognise the format of the input file `%s'"),
bfd_get_archive_filename (this_element));
+ output_bfd = bfd_openw (output_name, output_target);
copy_unknown_element:
delete = !copy_unknown_object (this_element, output_bfd);
if (!bfd_close_all_done (output_bfd))
if (get_file_size (input_filename) < 1)
{
- non_fatal (_("error: the input file '%s' is empty"), input_filename);
status = 1;
return;
}
if (bfd_check_format (ibfd, bfd_archive))
{
+ bfd_boolean force_output_target;
bfd *obfd;
/* bfd_get_target does not return the correct value until
bfd_check_format succeeds. */
if (output_target == NULL)
- output_target = bfd_get_target (ibfd);
+ {
+ output_target = bfd_get_target (ibfd);
+ force_output_target = FALSE;
+ }
+ else
+ force_output_target = TRUE;
obfd = bfd_openw (output_filename, output_target);
if (obfd == NULL)
RETURN_NONFATAL (output_filename);
- copy_archive (ibfd, obfd, output_target);
+ copy_archive (ibfd, obfd, output_target, force_output_target);
}
else if (bfd_check_format_matches (ibfd, bfd_object, &obj_matching))
{
size = bfd_section_size (ibfd, isection);
if (copy_byte >= 0)
size = (size + interleave - 1) / interleave;
+ else if (extract_symbol)
+ size = 0;
if (! bfd_set_section_size (obfd, osection, size))
{
err = _("size");
else
vma += change_section_address;
- if (! bfd_set_section_vma (obfd, osection, vma))
+ if (! bfd_set_section_vma (obfd, osection, extract_symbol ? 0 : vma))
{
err = _("vma");
goto loser;
else
lma += change_section_address;
- osection->lma = lma;
+ osection->lma = extract_symbol ? 0 : lma;
/* FIXME: This is probably not enough. If we change the LMA we
may have to recompute the header for the file as well. */
bfd_get_section_by_name since some formats allow multiple
sections with the same name. */
isection->output_section = osection;
- isection->output_offset = 0;
+ isection->output_offset = extract_symbol ? vma : 0;
+
+ /* Do not copy backend data if --extract-symbol is passed; anything
+ that needs to look at the section contents will fail. */
+ if (extract_symbol)
+ return;
/* Allow the BFD backend to copy any private data it understands
from the input section to the output section. */
err = _("private data");
goto loser;
}
+ else if ((isection->flags & SEC_GROUP) != 0)
+ {
+ asymbol *gsym = group_signature (isection);
+
+ if (gsym != NULL)
+ gsym->flags |= BSF_KEEP;
+ }
/* All went well. */
return;
free (relpp);
}
+ if (extract_symbol)
+ return;
+
if (bfd_get_section_flags (ibfd, isection) & SEC_HAS_CONTENTS
&& bfd_get_section_flags (obfd, osection) & SEC_HAS_CONTENTS)
{
char *tmpname;
if (get_file_size (argv[i]) < 1)
- continue;
+ {
+ status = 1;
+ continue;
+ }
if (preserve_dates)
/* No need to check the return value of stat().
tmpname = output_file;
else
tmpname = make_tempname (argv[i]);
- status = 0;
+ if (tmpname == NULL)
+ {
+ non_fatal (_("could not create temporary file to hold stripped copy of '%s'"),
+ argv[i]);
+ status = 1;
+ continue;
+ }
+
+ status = 0;
copy_file (argv[i], tmpname, input_target, output_target);
if (status == 0)
{
free (tmpname);
}
- return 0;
+ return status;
}
static int
size = get_file_size (s + 1);
if (size < 1)
- break;
+ {
+ status = 1;
+ break;
+ }
pa = xmalloc (sizeof (struct section_add));
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;
break;
case OPTION_ALT_MACH_CODE:
- use_alt_mach_code = atoi (optarg);
- if (use_alt_mach_code <= 0)
- fatal (_("alternate machine code index must be positive"));
+ use_alt_mach_code = strtoul (optarg, NULL, 0);
+ if (use_alt_mach_code == 0)
+ fatal (_("unable to parse alternative machine code"));
break;
case OPTION_PREFIX_SYMBOLS:
bfd_flags_to_set &= ~D_PAGED;
break;
+ case OPTION_EXTRACT_SYMBOL:
+ extract_symbol = TRUE;
+ break;
+
case 0:
/* We've been given a long option. */
break;
{
char *tmpname = make_tempname (input_filename);
+ if (tmpname == NULL)
+ fatal (_("warning: could not create temporary file whilst copying '%s', (error: %s)"),
+ input_filename, strerror (errno));
+
copy_file (input_filename, tmpname, input_target, output_target);
if (status == 0)
{
projects / deliverable / binutils-gdb.git / blobdiff