1 |
205 |
julius |
/* Plugin support for BFD.
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Copyright 2009
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Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "config.h"
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#include <assert.h>
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#include <dlfcn.h>
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25 |
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#include <stdarg.h>
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26 |
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#include "plugin-api.h"
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#include "sysdep.h"
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#include "plugin.h"
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29 |
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#include "libbfd.h"
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#include "libiberty.h"
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31 |
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#include <dirent.h>
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32 |
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33 |
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#define bfd_plugin_close_and_cleanup _bfd_generic_close_and_cleanup
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#define bfd_plugin_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
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35 |
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#define bfd_plugin_new_section_hook _bfd_generic_new_section_hook
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36 |
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#define bfd_plugin_get_section_contents _bfd_generic_get_section_contents
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#define bfd_plugin_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
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38 |
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#define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
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#define bfd_plugin_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
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#define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
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#define bfd_plugin_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
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#define bfd_plugin_core_file_matches_executable_p generic_core_file_matches_executable_p
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43 |
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#define bfd_plugin_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
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#define bfd_plugin_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
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#define bfd_plugin_get_lineno _bfd_nosymbols_get_lineno
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#define bfd_plugin_find_nearest_line _bfd_nosymbols_find_nearest_line
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#define bfd_plugin_find_inliner_info _bfd_nosymbols_find_inliner_info
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#define bfd_plugin_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
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#define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols
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#define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
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#define bfd_plugin_set_arch_mach bfd_default_set_arch_mach
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#define bfd_plugin_set_section_contents _bfd_generic_set_section_contents
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#define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
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#define bfd_plugin_bfd_relax_section bfd_generic_relax_section
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#define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
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#define bfd_plugin_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
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#define bfd_plugin_bfd_link_add_symbols _bfd_generic_link_add_symbols
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#define bfd_plugin_bfd_link_just_syms _bfd_generic_link_just_syms
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#define bfd_plugin_bfd_final_link _bfd_generic_final_link
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#define bfd_plugin_bfd_link_split_section _bfd_generic_link_split_section
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#define bfd_plugin_bfd_gc_sections bfd_generic_gc_sections
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#define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections
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#define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section
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#define bfd_plugin_bfd_discard_group bfd_generic_discard_group
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#define bfd_plugin_section_already_linked _bfd_generic_section_already_linked
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#define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol
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static enum ld_plugin_status
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message (int level ATTRIBUTE_UNUSED,
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const char * format, ...)
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{
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va_list args;
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va_start (args, format);
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printf ("bfd plugin: ");
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vprintf (format, args);
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va_end (args);
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return LDPS_OK;
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}
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/* Register a claim-file handler. */
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static ld_plugin_claim_file_handler claim_file;
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static enum ld_plugin_status
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register_claim_file (ld_plugin_claim_file_handler handler)
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{
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claim_file = handler;
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return LDPS_OK;
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}
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static enum ld_plugin_status
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add_symbols (void * handle,
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int nsyms,
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const struct ld_plugin_symbol * syms)
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{
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bfd *abfd = handle;
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struct plugin_data_struct *plugin_data =
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bfd_alloc (abfd, sizeof (plugin_data_struct));;
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plugin_data->nsyms = nsyms;
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plugin_data->syms = syms;
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if (nsyms != 0)
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abfd->flags |= HAS_SYMS;
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abfd->tdata.plugin_data = plugin_data;
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return LDPS_OK;
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}
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109 |
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static const char *plugin_program_name;
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void
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bfd_plugin_set_program_name (const char *program_name)
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{
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plugin_program_name = program_name;
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}
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116 |
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117 |
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static int
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try_load_plugin (const char *pname)
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{
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120 |
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static void *plugin_handle;
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int tv_size = 4;
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struct ld_plugin_tv tv[tv_size];
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int i;
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ld_plugin_onload onload;
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enum ld_plugin_status status;
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plugin_handle = dlopen (pname, RTLD_NOW);
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if (!plugin_handle)
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{
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(*_bfd_error_handler)("%s\n", dlerror ());
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return 0;
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}
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onload = dlsym (plugin_handle, "onload");
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if (!onload)
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goto err;
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i = 0;
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tv[i].tv_tag = LDPT_MESSAGE;
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tv[i].tv_u.tv_message = message;
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++i;
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tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
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tv[i].tv_u.tv_register_claim_file = register_claim_file;
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++i;
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tv[i].tv_tag = LDPT_ADD_SYMBOLS;
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tv[i].tv_u.tv_add_symbols = add_symbols;
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++i;
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tv[i].tv_tag = LDPT_NULL;
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tv[i].tv_u.tv_val = 0;
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status = (*onload)(tv);
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if (status != LDPS_OK)
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goto err;
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if (!claim_file)
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goto err;
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return 1;
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err:
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plugin_handle = NULL;
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return 0;
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}
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static const char *plugin_name;
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void
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bfd_plugin_set_plugin (const char *p)
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{
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plugin_name = p;
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}
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static int
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load_plugin (void)
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{
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180 |
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char *plugin_dir;
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char *p;
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DIR *d;
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struct dirent *ent;
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int found = 0;
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if (plugin_name)
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return try_load_plugin (plugin_name);
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189 |
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if (plugin_program_name == NULL)
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return 0;
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191 |
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192 |
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plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
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193 |
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p = make_relative_prefix (plugin_program_name,
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194 |
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BINDIR,
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plugin_dir);
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196 |
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free (plugin_dir);
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197 |
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plugin_dir = NULL;
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198 |
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199 |
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d = opendir (p);
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200 |
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if (!d)
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201 |
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goto out;
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202 |
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203 |
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while ((ent = readdir (d)))
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204 |
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{
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205 |
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char *full_name;
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206 |
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struct stat s;
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207 |
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208 |
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full_name = concat (p, "/", ent->d_name, NULL);
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209 |
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if (stat(full_name, &s) == 0 && S_ISREG (s.st_mode))
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210 |
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found = try_load_plugin (full_name);
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211 |
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free (full_name);
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212 |
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if (found)
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213 |
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break;
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214 |
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}
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215 |
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216 |
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out:
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217 |
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free (p);
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218 |
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if (d)
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219 |
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closedir (d);
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220 |
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221 |
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return found;
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222 |
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}
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223 |
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|
224 |
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|
225 |
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static const bfd_target *
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226 |
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bfd_plugin_object_p (bfd *abfd)
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227 |
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{
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228 |
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int claimed = 0;
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229 |
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int t = load_plugin ();
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230 |
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struct ld_plugin_input_file file;
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231 |
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if (!t)
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232 |
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return NULL;
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233 |
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|
234 |
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file.name = abfd->filename;
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235 |
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|
236 |
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if (abfd->iostream)
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237 |
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{
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238 |
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file.fd = fileno (abfd->iostream);
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239 |
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file.offset = 0;
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240 |
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file.filesize = 0; /*FIXME*/
|
241 |
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}
|
242 |
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else
|
243 |
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{
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244 |
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bfd *archive = abfd->my_archive;
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245 |
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BFD_ASSERT (archive);
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246 |
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file.fd = fileno (archive->iostream);
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247 |
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file.offset = abfd->origin;
|
248 |
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file.filesize = arelt_size (abfd);
|
249 |
|
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|
250 |
|
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}
|
251 |
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file.handle = abfd;
|
252 |
|
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claim_file (&file, &claimed);
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253 |
|
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if (!claimed)
|
254 |
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return NULL;
|
255 |
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|
256 |
|
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return abfd->xvec;
|
257 |
|
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}
|
258 |
|
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|
259 |
|
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/* Copy any private info we understand from the input bfd
|
260 |
|
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to the output bfd. */
|
261 |
|
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|
262 |
|
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static bfd_boolean
|
263 |
|
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bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
|
264 |
|
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bfd *obfd ATTRIBUTE_UNUSED)
|
265 |
|
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{
|
266 |
|
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BFD_ASSERT (0);
|
267 |
|
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return TRUE;
|
268 |
|
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}
|
269 |
|
|
|
270 |
|
|
/* Copy any private info we understand from the input section
|
271 |
|
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to the output section. */
|
272 |
|
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|
273 |
|
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static bfd_boolean
|
274 |
|
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bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
|
275 |
|
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asection *isection ATTRIBUTE_UNUSED,
|
276 |
|
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bfd *obfd ATTRIBUTE_UNUSED,
|
277 |
|
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asection *osection ATTRIBUTE_UNUSED)
|
278 |
|
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{
|
279 |
|
|
BFD_ASSERT (0);
|
280 |
|
|
return TRUE;
|
281 |
|
|
}
|
282 |
|
|
|
283 |
|
|
/* Copy any private info we understand from the input symbol
|
284 |
|
|
to the output symbol. */
|
285 |
|
|
|
286 |
|
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static bfd_boolean
|
287 |
|
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bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
|
288 |
|
|
asymbol *isymbol ATTRIBUTE_UNUSED,
|
289 |
|
|
bfd *obfd ATTRIBUTE_UNUSED,
|
290 |
|
|
asymbol *osymbol ATTRIBUTE_UNUSED)
|
291 |
|
|
{
|
292 |
|
|
BFD_ASSERT (0);
|
293 |
|
|
return TRUE;
|
294 |
|
|
}
|
295 |
|
|
|
296 |
|
|
static bfd_boolean
|
297 |
|
|
bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, PTR ptr ATTRIBUTE_UNUSED)
|
298 |
|
|
{
|
299 |
|
|
BFD_ASSERT (0);
|
300 |
|
|
return TRUE;
|
301 |
|
|
}
|
302 |
|
|
|
303 |
|
|
static char *
|
304 |
|
|
bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED)
|
305 |
|
|
{
|
306 |
|
|
BFD_ASSERT (0);
|
307 |
|
|
return NULL;
|
308 |
|
|
}
|
309 |
|
|
|
310 |
|
|
static int
|
311 |
|
|
bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
|
312 |
|
|
{
|
313 |
|
|
BFD_ASSERT (0);
|
314 |
|
|
return 0;
|
315 |
|
|
}
|
316 |
|
|
|
317 |
|
|
static long
|
318 |
|
|
bfd_plugin_get_symtab_upper_bound (bfd *abfd)
|
319 |
|
|
{
|
320 |
|
|
struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
|
321 |
|
|
long nsyms = plugin_data->nsyms;
|
322 |
|
|
|
323 |
|
|
BFD_ASSERT (nsyms >= 0);
|
324 |
|
|
|
325 |
|
|
return ((nsyms + 1) * sizeof (asymbol *));
|
326 |
|
|
}
|
327 |
|
|
|
328 |
|
|
static flagword
|
329 |
|
|
convert_flags (const struct ld_plugin_symbol *sym)
|
330 |
|
|
{
|
331 |
|
|
switch (sym->def)
|
332 |
|
|
{
|
333 |
|
|
case LDPK_DEF:
|
334 |
|
|
case LDPK_COMMON:
|
335 |
|
|
case LDPK_UNDEF:
|
336 |
|
|
return BSF_GLOBAL;
|
337 |
|
|
|
338 |
|
|
case LDPK_WEAKUNDEF:
|
339 |
|
|
case LDPK_WEAKDEF:
|
340 |
|
|
return BSF_GLOBAL | BSF_WEAK;
|
341 |
|
|
|
342 |
|
|
default:
|
343 |
|
|
BFD_ASSERT (0);
|
344 |
|
|
return 0;
|
345 |
|
|
}
|
346 |
|
|
}
|
347 |
|
|
|
348 |
|
|
static long
|
349 |
|
|
bfd_plugin_canonicalize_symtab (bfd *abfd,
|
350 |
|
|
asymbol **alocation)
|
351 |
|
|
{
|
352 |
|
|
struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
|
353 |
|
|
long nsyms = plugin_data->nsyms;
|
354 |
|
|
const struct ld_plugin_symbol *syms = plugin_data->syms;
|
355 |
|
|
static asection fake_section;
|
356 |
|
|
static asection fake_common_section;
|
357 |
|
|
int i;
|
358 |
|
|
|
359 |
|
|
fake_section.name = ".text";
|
360 |
|
|
fake_common_section.flags = SEC_IS_COMMON;
|
361 |
|
|
|
362 |
|
|
for (i = 0; i < nsyms; i++)
|
363 |
|
|
{
|
364 |
|
|
asymbol *s = bfd_alloc (abfd, sizeof (asymbol));
|
365 |
|
|
|
366 |
|
|
BFD_ASSERT (s);
|
367 |
|
|
alocation[i] = s;
|
368 |
|
|
|
369 |
|
|
s->the_bfd = abfd;
|
370 |
|
|
s->name = syms[i].name;
|
371 |
|
|
s->value = 0;
|
372 |
|
|
s->flags = convert_flags (&syms[i]);
|
373 |
|
|
switch (syms[i].def)
|
374 |
|
|
{
|
375 |
|
|
case LDPK_COMMON:
|
376 |
|
|
s->section = &fake_common_section;
|
377 |
|
|
break;
|
378 |
|
|
case LDPK_UNDEF:
|
379 |
|
|
case LDPK_WEAKUNDEF:
|
380 |
|
|
s->section = bfd_und_section_ptr;
|
381 |
|
|
break;
|
382 |
|
|
case LDPK_DEF:
|
383 |
|
|
case LDPK_WEAKDEF:
|
384 |
|
|
s->section = &fake_section;
|
385 |
|
|
break;
|
386 |
|
|
default:
|
387 |
|
|
BFD_ASSERT (0);
|
388 |
|
|
}
|
389 |
|
|
|
390 |
|
|
s->udata.p = (void *) &syms[i];
|
391 |
|
|
}
|
392 |
|
|
|
393 |
|
|
return nsyms;
|
394 |
|
|
}
|
395 |
|
|
|
396 |
|
|
static void
|
397 |
|
|
bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED,
|
398 |
|
|
PTR afile ATTRIBUTE_UNUSED,
|
399 |
|
|
asymbol *symbol ATTRIBUTE_UNUSED,
|
400 |
|
|
bfd_print_symbol_type how ATTRIBUTE_UNUSED)
|
401 |
|
|
{
|
402 |
|
|
BFD_ASSERT (0);
|
403 |
|
|
}
|
404 |
|
|
|
405 |
|
|
static void
|
406 |
|
|
bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
|
407 |
|
|
asymbol *symbol,
|
408 |
|
|
symbol_info *ret)
|
409 |
|
|
{
|
410 |
|
|
bfd_symbol_info (symbol, ret);
|
411 |
|
|
}
|
412 |
|
|
|
413 |
|
|
/* Make an empty symbol. */
|
414 |
|
|
|
415 |
|
|
static asymbol *
|
416 |
|
|
bfd_plugin_make_empty_symbol (bfd *abfd)
|
417 |
|
|
{
|
418 |
|
|
asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol));
|
419 |
|
|
if (new_symbol == NULL)
|
420 |
|
|
return new_symbol;
|
421 |
|
|
new_symbol->the_bfd = abfd;
|
422 |
|
|
return new_symbol;
|
423 |
|
|
}
|
424 |
|
|
|
425 |
|
|
static int
|
426 |
|
|
bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
|
427 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED)
|
428 |
|
|
{
|
429 |
|
|
BFD_ASSERT (0);
|
430 |
|
|
return 0;
|
431 |
|
|
}
|
432 |
|
|
|
433 |
|
|
static bfd_boolean
|
434 |
|
|
bfd_plugin_mkobject (bfd *abfd ATTRIBUTE_UNUSED)
|
435 |
|
|
{
|
436 |
|
|
BFD_ASSERT (0);
|
437 |
|
|
return 0;
|
438 |
|
|
}
|
439 |
|
|
|
440 |
|
|
const bfd_target plugin_vec =
|
441 |
|
|
{
|
442 |
|
|
"plugin", /* Name. */
|
443 |
|
|
bfd_target_unknown_flavour,
|
444 |
|
|
BFD_ENDIAN_LITTLE, /* Target byte order. */
|
445 |
|
|
BFD_ENDIAN_LITTLE, /* Target headers byte order. */
|
446 |
|
|
(HAS_RELOC | EXEC_P | /* Object flags. */
|
447 |
|
|
HAS_LINENO | HAS_DEBUG |
|
448 |
|
|
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
|
449 |
|
|
(SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
|
450 |
|
|
| SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags. */
|
451 |
|
|
0, /* symbol_leading_char. */
|
452 |
|
|
'/', /* ar_pad_char. */
|
453 |
|
|
15, /* ar_max_namelen. */
|
454 |
|
|
|
455 |
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
456 |
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
457 |
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
|
458 |
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
459 |
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
460 |
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
|
461 |
|
|
|
462 |
|
|
{ /* bfd_check_format. */
|
463 |
|
|
_bfd_dummy_target,
|
464 |
|
|
bfd_plugin_object_p,
|
465 |
|
|
bfd_generic_archive_p,
|
466 |
|
|
_bfd_dummy_target
|
467 |
|
|
},
|
468 |
|
|
{ /* bfd_set_format. */
|
469 |
|
|
bfd_false,
|
470 |
|
|
bfd_plugin_mkobject,
|
471 |
|
|
_bfd_generic_mkarchive,
|
472 |
|
|
bfd_false,
|
473 |
|
|
},
|
474 |
|
|
{ /* bfd_write_contents. */
|
475 |
|
|
bfd_false,
|
476 |
|
|
bfd_false,
|
477 |
|
|
_bfd_write_archive_contents,
|
478 |
|
|
bfd_false,
|
479 |
|
|
},
|
480 |
|
|
|
481 |
|
|
BFD_JUMP_TABLE_GENERIC (bfd_plugin),
|
482 |
|
|
BFD_JUMP_TABLE_COPY (bfd_plugin),
|
483 |
|
|
BFD_JUMP_TABLE_CORE (bfd_plugin),
|
484 |
|
|
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
|
485 |
|
|
BFD_JUMP_TABLE_SYMBOLS (bfd_plugin),
|
486 |
|
|
BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
|
487 |
|
|
BFD_JUMP_TABLE_WRITE (bfd_plugin),
|
488 |
|
|
BFD_JUMP_TABLE_LINK (bfd_plugin),
|
489 |
|
|
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
490 |
|
|
|
491 |
|
|
NULL,
|
492 |
|
|
|
493 |
|
|
NULL /* backend_data. */
|
494 |
|
|
};
|