/* 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
+ 2001, 2002, 2003, 2004, 2005, 2006
Free Software Foundation, Inc.
This file is part of GNU Binutils.
#include "fnmatch.h"
#include "elf-bfd.h"
#include <sys/stat.h>
+#include "libbfd.h"
/* A list of symbols to explicitly strip out, or to keep. A linked
list is good enough for a small number from the command line, but
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;
/* If this is TRUE, we weaken global symbols (set BSF_WEAK). */
static bfd_boolean weaken = FALSE;
+/* If this is TRUE, we retain BSF_FILE symbols. */
+static bfd_boolean keep_file_symbols = FALSE;
+
/* Prefix symbols/sections. */
static char *prefix_symbols_string = 0;
static char *prefix_sections_string = 0;
OPTION_STRIP_UNNEEDED_SYMBOL,
OPTION_STRIP_UNNEEDED_SYMBOLS,
OPTION_KEEP_SYMBOLS,
+ OPTION_LOCALIZE_HIDDEN,
OPTION_LOCALIZE_SYMBOLS,
OPTION_GLOBALIZE_SYMBOL,
OPTION_GLOBALIZE_SYMBOLS,
OPTION_FORMATS_INFO,
OPTION_ADD_GNU_DEBUGLINK,
OPTION_ONLY_KEEP_DEBUG,
+ OPTION_KEEP_FILE_SYMBOLS,
OPTION_READONLY_TEXT,
OPTION_WRITABLE_TEXT,
OPTION_PURE,
{"info", no_argument, 0, OPTION_FORMATS_INFO},
{"input-format", required_argument, 0, 'I'}, /* Obsolete */
{"input-target", required_argument, 0, 'I'},
+ {"keep-file-symbols", no_argument, 0, OPTION_KEEP_FILE_SYMBOLS},
{"keep-symbol", required_argument, 0, 'K'},
{"only-keep-debug", no_argument, 0, OPTION_ONLY_KEEP_DEBUG},
{"output-format", required_argument, 0, 'O'}, /* Obsolete */
{"input-format", required_argument, 0, 'I'}, /* Obsolete */
{"input-target", required_argument, 0, 'I'},
{"interleave", required_argument, 0, 'i'},
+ {"keep-file-symbols", no_argument, 0, OPTION_KEEP_FILE_SYMBOLS},
{"keep-global-symbol", required_argument, 0, 'G'},
{"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},
relocations\n\
--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\
--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\
--only-keep-debug Strip everything but the debug information\n\
-N --strip-symbol=<name> Do not copy symbol <name>\n\
-K --keep-symbol=<name> Do not strip symbol <name>\n\
+ --keep-file-symbols Do not strip file symbol(s)\n\
-w --wildcard Permit wildcard in symbol comparison\n\
-x --discard-all Remove all non-global symbols\n\
-X --discard-locals Remove any compiler-generated symbols\n\
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. */
&& !(flags & BSF_KEEP)
&& is_specified_symbol (name, strip_unneeded_list))
keep = 0;
- if (!keep && is_specified_symbol (name, keep_specific_list))
+ if (!keep
+ && ((keep_file_symbols && (flags & BSF_FILE))
+ || is_specified_symbol (name, keep_specific_list)))
keep = 1;
if (keep && is_strip_section (abfd, bfd_get_section (sym)))
keep = 0;
&& (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;
if (osympp != isympp)
free (osympp);
+ isympp = NULL;
+ osympp = NULL;
+
/* 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);
if (pset != NULL && pset->set_flags)
flags = pset->flags | SEC_HAS_CONTENTS;
- padd->section = bfd_make_section_with_flags (obfd, padd->name, flags);
- if (padd->section == NULL)
+ /* bfd_make_section_with_flags() does not return very helpful
+ error codes, so check for the most likely user error first. */
+ if (bfd_get_section_by_name (obfd, padd->name))
{
- non_fatal (_("can't create section `%s': %s"),
- padd->name, bfd_errmsg (bfd_get_error ()));
+ non_fatal (_("can't add section '%s' - it already exists!"), padd->name);
return FALSE;
}
+ else
+ {
+ padd->section = bfd_make_section_with_flags (obfd, padd->name, flags);
+ if (padd->section == NULL)
+ {
+ non_fatal (_("can't create section `%s': %s"),
+ padd->name, bfd_errmsg (bfd_get_error ()));
+ return FALSE;
+ }
+ }
if (! bfd_set_section_size (obfd, padd->section, padd->size))
{
return FALSE;
}
+ /* Special processing for PE format files. We
+ have no way to distinguish PE from COFF here. */
if (bfd_get_flavour (obfd) == bfd_target_coff_flavour)
- /* Try to set the VMA of the section to some non-zero value so
- that it will work for PE format files. (We have no way to
- distinguish between COFF and PE flavours). If this does not
- work, just ignore the failure. */
- bfd_set_section_vma (obfd, gnu_debuglink_section, 0xf0000000);
+ {
+ bfd_vma debuglink_vma;
+ asection * highest_section;
+ asection * sec;
+
+ /* The PE spec requires that all sections be adjacent and sorted
+ in ascending order of VMA. It also specifies that debug
+ sections should be last. This is despite the fact that debug
+ sections are not loaded into memory and so in theory have no
+ use for a VMA.
+
+ This means that the debuglink section must be given a non-zero
+ VMA which makes it contiguous with other debug sections. So
+ walk the current section list, find the section with the
+ highest VMA and start the debuglink section after that one. */
+ for (sec = obfd->sections, highest_section = NULL;
+ sec != NULL;
+ sec = sec->next)
+ if (sec->vma > 0
+ && (highest_section == NULL
+ || sec->vma > highest_section->vma))
+ highest_section = sec;
+
+ if (highest_section)
+ debuglink_vma = BFD_ALIGN (highest_section->vma
+ + highest_section->size,
+ /* FIXME: We ought to be using
+ COFF_PAGE_SIZE here or maybe
+ bfd_get_section_alignment() (if it
+ was set) but since this is for PE
+ and we know the required alignment
+ it is easier just to hard code it. */
+ 0x1000);
+ else
+ /* Umm, not sure what to do in this case. */
+ debuglink_vma = 0x1000;
+
+ bfd_set_section_vma (obfd, gnu_debuglink_section, debuglink_vma);
+ }
}
if (bfd_count_sections (obfd) == 0)
|| 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
/* 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;
}
case OPTION_ONLY_KEEP_DEBUG:
strip_symbols = STRIP_NONDEBUG;
break;
+ case OPTION_KEEP_FILE_SYMBOLS:
+ keep_file_symbols = 1;
+ break;
case 0:
/* We've been given a long option. */
break;
strip_symbols = STRIP_NONDEBUG;
break;
+ case OPTION_KEEP_FILE_SYMBOLS:
+ keep_file_symbols = 1;
+ break;
+
case OPTION_ADD_GNU_DEBUGLINK:
gnu_debuglink_filename = optarg;
break;
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:
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