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Commit | Line | Data |
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ce3c775b | 1 | /* Plugin support for BFD. |
fd67aa11 | 2 | Copyright (C) 2009-2024 Free Software Foundation, Inc. |
ce3c775b NC |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
691bf19c | 21 | #include "sysdep.h" |
98950613 AM |
22 | #include "bfd.h" |
23 | ||
24 | #if BFD_SUPPORTS_PLUGINS | |
25 | ||
ce3c775b | 26 | #include <assert.h> |
17d5dae2 | 27 | #ifdef HAVE_DLFCN_H |
ce3c775b | 28 | #include <dlfcn.h> |
17d5dae2 KT |
29 | #elif defined (HAVE_WINDOWS_H) |
30 | #include <windows.h> | |
31 | #else | |
32 | #error Unknown how to handle dynamic-load-libraries. | |
33 | #endif | |
ce3c775b NC |
34 | #include <stdarg.h> |
35 | #include "plugin-api.h" | |
ce3c775b NC |
36 | #include "plugin.h" |
37 | #include "libbfd.h" | |
38 | #include "libiberty.h" | |
39 | #include <dirent.h> | |
40 | ||
17d5dae2 KT |
41 | #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) |
42 | ||
43 | #define RTLD_NOW 0 /* Dummy value. */ | |
44 | ||
45 | static void * | |
46 | dlopen (const char *file, int mode ATTRIBUTE_UNUSED) | |
47 | { | |
48 | return LoadLibrary (file); | |
49 | } | |
50 | ||
51 | static void * | |
52 | dlsym (void *handle, const char *name) | |
53 | { | |
54 | return GetProcAddress (handle, name); | |
55 | } | |
56 | ||
57 | static int ATTRIBUTE_UNUSED | |
58 | dlclose (void *handle) | |
59 | { | |
60 | FreeLibrary (handle); | |
61 | return 0; | |
62 | } | |
63 | ||
64 | static const char * | |
65 | dlerror (void) | |
66 | { | |
67 | return "Unable to load DLL."; | |
68 | } | |
69 | ||
70 | #endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */ | |
71 | ||
3d98c460 | 72 | #define bfd_plugin_close_and_cleanup _bfd_generic_close_and_cleanup |
07d6d2b8 AM |
73 | #define bfd_plugin_bfd_free_cached_info _bfd_generic_bfd_free_cached_info |
74 | #define bfd_plugin_new_section_hook _bfd_generic_new_section_hook | |
75 | #define bfd_plugin_get_section_contents _bfd_generic_get_section_contents | |
433b4f8a | 76 | #define bfd_plugin_init_private_section_data _bfd_generic_init_private_section_data |
07d6d2b8 AM |
77 | #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data |
78 | #define bfd_plugin_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data | |
79 | #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data | |
80 | #define bfd_plugin_bfd_set_private_flags _bfd_generic_bfd_set_private_flags | |
ce3c775b | 81 | #define bfd_plugin_core_file_matches_executable_p generic_core_file_matches_executable_p |
07d6d2b8 | 82 | #define bfd_plugin_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name |
d00dd7dc | 83 | #define bfd_plugin_bfd_is_target_special_symbol _bfd_bool_bfd_asymbol_false |
07d6d2b8 AM |
84 | #define bfd_plugin_get_lineno _bfd_nosymbols_get_lineno |
85 | #define bfd_plugin_find_nearest_line _bfd_nosymbols_find_nearest_line | |
6e7a29c7 | 86 | #define bfd_plugin_find_nearest_line_with_alt _bfd_nosymbols_find_nearest_line_with_alt |
07d6d2b8 AM |
87 | #define bfd_plugin_find_line _bfd_nosymbols_find_line |
88 | #define bfd_plugin_find_inliner_info _bfd_nosymbols_find_inliner_info | |
60bb06bc | 89 | #define bfd_plugin_get_symbol_version_string _bfd_nosymbols_get_symbol_version_string |
07d6d2b8 AM |
90 | #define bfd_plugin_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol |
91 | #define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols | |
92 | #define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol | |
93 | #define bfd_plugin_set_arch_mach bfd_default_set_arch_mach | |
94 | #define bfd_plugin_set_section_contents _bfd_generic_set_section_contents | |
ce3c775b | 95 | #define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents |
07d6d2b8 AM |
96 | #define bfd_plugin_bfd_relax_section bfd_generic_relax_section |
97 | #define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create | |
98 | #define bfd_plugin_bfd_link_add_symbols _bfd_generic_link_add_symbols | |
99 | #define bfd_plugin_bfd_link_just_syms _bfd_generic_link_just_syms | |
100 | #define bfd_plugin_bfd_final_link _bfd_generic_final_link | |
101 | #define bfd_plugin_bfd_link_split_section _bfd_generic_link_split_section | |
102 | #define bfd_plugin_bfd_gc_sections bfd_generic_gc_sections | |
103 | #define bfd_plugin_bfd_lookup_section_flags bfd_generic_lookup_section_flags | |
104 | #define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections | |
105 | #define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section | |
cb7f4b29 | 106 | #define bfd_plugin_bfd_group_name bfd_generic_group_name |
07d6d2b8 AM |
107 | #define bfd_plugin_bfd_discard_group bfd_generic_discard_group |
108 | #define bfd_plugin_section_already_linked _bfd_generic_section_already_linked | |
109 | #define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol | |
34a87bb0 | 110 | #define bfd_plugin_bfd_link_hide_symbol _bfd_generic_link_hide_symbol |
07d6d2b8 | 111 | #define bfd_plugin_bfd_define_start_stop bfd_generic_define_start_stop |
69a630b5 | 112 | #define bfd_plugin_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type |
07d6d2b8 | 113 | #define bfd_plugin_bfd_link_check_relocs _bfd_generic_link_check_relocs |
ce3c775b NC |
114 | |
115 | static enum ld_plugin_status | |
116 | message (int level ATTRIBUTE_UNUSED, | |
117 | const char * format, ...) | |
118 | { | |
119 | va_list args; | |
120 | va_start (args, format); | |
121 | printf ("bfd plugin: "); | |
122 | vprintf (format, args); | |
d9b21463 | 123 | putchar ('\n'); |
ce3c775b NC |
124 | va_end (args); |
125 | return LDPS_OK; | |
126 | } | |
127 | ||
0aa99dcd L |
128 | struct plugin_list_entry |
129 | { | |
130 | /* These must be initialized for each IR object with LTO wrapper. */ | |
0aa99dcd | 131 | ld_plugin_claim_file_handler claim_file; |
b21318bd | 132 | ld_plugin_claim_file_handler_v2 claim_file_v2; |
0aa99dcd L |
133 | ld_plugin_all_symbols_read_handler all_symbols_read; |
134 | ld_plugin_all_symbols_read_handler cleanup_handler; | |
0a1b45a2 | 135 | bool has_symbol_type; |
0aa99dcd L |
136 | |
137 | struct plugin_list_entry *next; | |
138 | ||
139 | /* These can be reused for all IR objects. */ | |
140 | const char *plugin_name; | |
0aa99dcd L |
141 | }; |
142 | ||
ecda9016 | 143 | static const char *plugin_program_name; |
ecda9016 L |
144 | |
145 | void | |
3d98c460 | 146 | bfd_plugin_set_program_name (const char *program_name) |
ecda9016 L |
147 | { |
148 | plugin_program_name = program_name; | |
0aa99dcd L |
149 | } |
150 | ||
151 | static struct plugin_list_entry *plugin_list = NULL; | |
152 | static struct plugin_list_entry *current_plugin = NULL; | |
153 | ||
ce3c775b | 154 | /* Register a claim-file handler. */ |
ce3c775b NC |
155 | |
156 | static enum ld_plugin_status | |
157 | register_claim_file (ld_plugin_claim_file_handler handler) | |
158 | { | |
0aa99dcd L |
159 | current_plugin->claim_file = handler; |
160 | return LDPS_OK; | |
161 | } | |
162 | ||
b21318bd JM |
163 | |
164 | /* Register a claim-file handler, version 2. */ | |
165 | ||
166 | static enum ld_plugin_status | |
167 | register_claim_file_v2 (ld_plugin_claim_file_handler_v2 handler) | |
168 | { | |
169 | current_plugin->claim_file_v2 = handler; | |
170 | return LDPS_OK; | |
171 | } | |
172 | ||
ce3c775b NC |
173 | static enum ld_plugin_status |
174 | add_symbols (void * handle, | |
175 | int nsyms, | |
176 | const struct ld_plugin_symbol * syms) | |
177 | { | |
178 | bfd *abfd = handle; | |
179 | struct plugin_data_struct *plugin_data = | |
5bb3703f | 180 | bfd_alloc (abfd, sizeof (plugin_data_struct)); |
ce3c775b | 181 | |
3d98c460 L |
182 | if (!plugin_data) |
183 | return LDPS_ERR; | |
0aa99dcd | 184 | |
3d98c460 L |
185 | plugin_data->nsyms = nsyms; |
186 | plugin_data->syms = syms; | |
ce3c775b NC |
187 | |
188 | if (nsyms != 0) | |
189 | abfd->flags |= HAS_SYMS; | |
190 | ||
3d98c460 | 191 | abfd->tdata.plugin_data = plugin_data; |
ce3c775b NC |
192 | return LDPS_OK; |
193 | } | |
194 | ||
c3a1714c L |
195 | static enum ld_plugin_status |
196 | add_symbols_v2 (void *handle, int nsyms, | |
197 | const struct ld_plugin_symbol *syms) | |
198 | { | |
0a1b45a2 | 199 | current_plugin->has_symbol_type = true; |
c3a1714c L |
200 | return add_symbols (handle, nsyms, syms); |
201 | } | |
202 | ||
7d0b9ebc AM |
203 | int |
204 | bfd_plugin_open_input (bfd *ibfd, struct ld_plugin_input_file *file) | |
ce3c775b | 205 | { |
e44f5bef | 206 | bfd *iobfd; |
91817247 | 207 | int fd; |
e44f5bef | 208 | |
7d0b9ebc | 209 | iobfd = ibfd; |
27b07675 AM |
210 | while (iobfd->my_archive |
211 | && !bfd_is_thin_archive (iobfd->my_archive)) | |
212 | iobfd = iobfd->my_archive; | |
765cf5f6 | 213 | file->name = bfd_get_filename (iobfd); |
e44f5bef MT |
214 | |
215 | if (!iobfd->iostream && !bfd_open_file (iobfd)) | |
216 | return 0; | |
217 | ||
91817247 L |
218 | /* Reuse the archive plugin file descriptor. */ |
219 | if (iobfd != ibfd) | |
220 | fd = iobfd->archive_plugin_fd; | |
221 | else | |
222 | fd = -1; | |
223 | ||
224 | if (fd < 0) | |
83b0a686 | 225 | { |
91817247 L |
226 | /* The plugin API expects that the file descriptor won't be closed |
227 | and reused as done by the bfd file cache. So open it again. | |
228 | dup isn't good enough. plugin IO uses lseek/read while BFD uses | |
229 | fseek/fread. It isn't wise to mix the unistd and stdio calls on | |
230 | the same underlying file descriptor. */ | |
231 | fd = open (file->name, O_RDONLY | O_BINARY); | |
232 | if (fd < 0) | |
233 | { | |
83b0a686 | 234 | #ifndef EMFILE |
91817247 | 235 | return 0; |
83b0a686 | 236 | #else |
91817247 L |
237 | if (errno != EMFILE) |
238 | return 0; | |
83b0a686 NC |
239 | |
240 | #ifdef HAVE_GETRLIMIT | |
91817247 L |
241 | struct rlimit lim; |
242 | ||
243 | /* Complicated links involving lots of files and/or large | |
244 | archives can exhaust the number of file descriptors | |
245 | available to us. If possible, try to allocate more | |
246 | descriptors. */ | |
247 | if (getrlimit (RLIMIT_NOFILE, & lim) == 0 | |
248 | && lim.rlim_cur < lim.rlim_max) | |
249 | { | |
250 | lim.rlim_cur = lim.rlim_max; | |
251 | if (setrlimit (RLIMIT_NOFILE, &lim) == 0) | |
252 | fd = open (file->name, O_RDONLY | O_BINARY); | |
253 | } | |
254 | ||
255 | if (fd < 0) | |
83b0a686 | 256 | #endif |
91817247 L |
257 | { |
258 | _bfd_error_handler (_("plugin framework: out of file descriptors. Try using fewer objects/archives\n")); | |
259 | return 0; | |
260 | } | |
83b0a686 | 261 | #endif |
91817247 L |
262 | } |
263 | } | |
e44f5bef | 264 | |
7d0b9ebc | 265 | if (iobfd == ibfd) |
e44f5bef MT |
266 | { |
267 | struct stat stat_buf; | |
103da91b | 268 | |
91817247 | 269 | if (fstat (fd, &stat_buf)) |
103da91b | 270 | { |
91817247 | 271 | close (fd); |
103da91b NC |
272 | return 0; |
273 | } | |
274 | ||
7d0b9ebc AM |
275 | file->offset = 0; |
276 | file->filesize = stat_buf.st_size; | |
277 | } | |
278 | else | |
279 | { | |
91817247 L |
280 | /* Cache the archive plugin file descriptor. */ |
281 | iobfd->archive_plugin_fd = fd; | |
282 | iobfd->archive_plugin_fd_open_count++; | |
283 | ||
7d0b9ebc AM |
284 | file->offset = ibfd->origin; |
285 | file->filesize = arelt_size (ibfd); | |
e44f5bef | 286 | } |
91817247 L |
287 | |
288 | file->fd = fd; | |
7d0b9ebc AM |
289 | return 1; |
290 | } | |
291 | ||
7a30ac44 L |
292 | /* Close the plugin file descriptor FD. If ABFD isn't NULL, it is an |
293 | archive member. */ | |
91817247 L |
294 | |
295 | void | |
296 | bfd_plugin_close_file_descriptor (bfd *abfd, int fd) | |
297 | { | |
7a30ac44 | 298 | if (abfd == NULL) |
91817247 L |
299 | close (fd); |
300 | else | |
301 | { | |
7a30ac44 L |
302 | while (abfd->my_archive |
303 | && !bfd_is_thin_archive (abfd->my_archive)) | |
304 | abfd = abfd->my_archive; | |
305 | ||
5a98fb75 L |
306 | /* Close the file descriptor if there is no archive plugin file |
307 | descriptor. */ | |
308 | if (abfd->archive_plugin_fd == -1) | |
309 | { | |
310 | close (fd); | |
311 | return; | |
312 | } | |
313 | ||
7a30ac44 | 314 | abfd->archive_plugin_fd_open_count--; |
91817247 L |
315 | /* Dup the archive plugin file descriptor for later use, which |
316 | will be closed by _bfd_archive_close_and_cleanup. */ | |
7a30ac44 | 317 | if (abfd->archive_plugin_fd_open_count == 0) |
91817247 | 318 | { |
7a30ac44 | 319 | abfd->archive_plugin_fd = dup (fd); |
91817247 L |
320 | close (fd); |
321 | } | |
322 | } | |
323 | } | |
324 | ||
7d0b9ebc AM |
325 | static int |
326 | try_claim (bfd *abfd) | |
327 | { | |
328 | int claimed = 0; | |
329 | struct ld_plugin_input_file file; | |
e44f5bef | 330 | |
27b07675 | 331 | file.handle = abfd; |
22fe7df8 L |
332 | if (bfd_plugin_open_input (abfd, &file) |
333 | && current_plugin->claim_file) | |
0aa99dcd L |
334 | { |
335 | current_plugin->claim_file (&file, &claimed); | |
7a30ac44 L |
336 | bfd_plugin_close_file_descriptor ((abfd->my_archive != NULL |
337 | ? abfd : NULL), | |
338 | file.fd); | |
0aa99dcd | 339 | } |
22fe7df8 | 340 | |
7d0b9ebc | 341 | return claimed; |
e44f5bef MT |
342 | } |
343 | ||
0a1b45a2 AM |
344 | static bool |
345 | try_load_plugin (const char *pname, | |
346 | struct plugin_list_entry *plugin_list_iter, | |
347 | bfd *abfd, | |
348 | bool build_list_p) | |
e44f5bef | 349 | { |
dcf06b89 | 350 | void *plugin_handle; |
b21318bd | 351 | struct ld_plugin_tv tv[6]; |
ce3c775b NC |
352 | int i; |
353 | ld_plugin_onload onload; | |
354 | enum ld_plugin_status status; | |
0a1b45a2 | 355 | bool result = false; |
5ae0078c | 356 | |
22fe7df8 L |
357 | /* NB: Each object is independent. Reuse the previous plugin from |
358 | the last run will lead to wrong result. */ | |
359 | if (current_plugin) | |
dcf06b89 L |
360 | memset (current_plugin, 0, |
361 | offsetof (struct plugin_list_entry, next)); | |
0aa99dcd | 362 | |
99845b3b L |
363 | if (plugin_list_iter) |
364 | pname = plugin_list_iter->plugin_name; | |
365 | ||
ce3c775b NC |
366 | plugin_handle = dlopen (pname, RTLD_NOW); |
367 | if (!plugin_handle) | |
368 | { | |
13aa5ceb NC |
369 | /* If we are building a list of viable plugins, then |
370 | we do not bother the user with the details of any | |
371 | plugins that cannot be loaded. */ | |
372 | if (! build_list_p) | |
373 | _bfd_error_handler ("Failed to load plugin '%s', reason: %s\n", | |
374 | pname, dlerror ()); | |
0a1b45a2 | 375 | return false; |
ce3c775b NC |
376 | } |
377 | ||
22fe7df8 | 378 | if (plugin_list_iter == NULL) |
b0ceb98a | 379 | { |
22fe7df8 L |
380 | size_t length_plugin_name = strlen (pname) + 1; |
381 | char *plugin_name = bfd_malloc (length_plugin_name); | |
13aa5ceb | 382 | |
22fe7df8 | 383 | if (plugin_name == NULL) |
dcf06b89 | 384 | goto short_circuit; |
22fe7df8 L |
385 | plugin_list_iter = bfd_malloc (sizeof *plugin_list_iter); |
386 | if (plugin_list_iter == NULL) | |
4b24dd1a | 387 | { |
22fe7df8 | 388 | free (plugin_name); |
dcf06b89 | 389 | goto short_circuit; |
4b24dd1a | 390 | } |
22fe7df8 L |
391 | /* Make a copy of PNAME since PNAME from load_plugin () will be |
392 | freed. */ | |
393 | memcpy (plugin_name, pname, length_plugin_name); | |
394 | memset (plugin_list_iter, 0, sizeof (*plugin_list_iter)); | |
395 | plugin_list_iter->plugin_name = plugin_name; | |
396 | plugin_list_iter->next = plugin_list; | |
397 | plugin_list = plugin_list_iter; | |
b0ceb98a Z |
398 | } |
399 | ||
dcf06b89 | 400 | current_plugin = plugin_list_iter; |
99845b3b | 401 | if (build_list_p) |
dcf06b89 | 402 | goto short_circuit; |
0aa99dcd | 403 | |
ce3c775b NC |
404 | onload = dlsym (plugin_handle, "onload"); |
405 | if (!onload) | |
dcf06b89 | 406 | goto short_circuit; |
ce3c775b NC |
407 | |
408 | i = 0; | |
409 | tv[i].tv_tag = LDPT_MESSAGE; | |
410 | tv[i].tv_u.tv_message = message; | |
411 | ||
412 | ++i; | |
413 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
414 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
415 | ||
b21318bd JM |
416 | ++i; |
417 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK_V2; | |
418 | tv[i].tv_u.tv_register_claim_file_v2 = register_claim_file_v2; | |
419 | ||
ce3c775b NC |
420 | ++i; |
421 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
422 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
423 | ||
c3a1714c L |
424 | ++i; |
425 | tv[i].tv_tag = LDPT_ADD_SYMBOLS_V2; | |
426 | tv[i].tv_u.tv_add_symbols = add_symbols_v2; | |
427 | ||
ce3c775b NC |
428 | ++i; |
429 | tv[i].tv_tag = LDPT_NULL; | |
430 | tv[i].tv_u.tv_val = 0; | |
431 | ||
0aa99dcd | 432 | /* LTO plugin will call handler hooks to set up plugin handlers. */ |
ce3c775b NC |
433 | status = (*onload)(tv); |
434 | ||
435 | if (status != LDPS_OK) | |
dcf06b89 | 436 | goto short_circuit; |
b0ceb98a | 437 | |
5ae0078c L |
438 | abfd->plugin_format = bfd_plugin_no; |
439 | ||
0aa99dcd | 440 | if (!current_plugin->claim_file) |
dcf06b89 | 441 | goto short_circuit; |
ce3c775b | 442 | |
e44f5bef | 443 | if (!try_claim (abfd)) |
dcf06b89 | 444 | goto short_circuit; |
e44f5bef | 445 | |
5ae0078c | 446 | abfd->plugin_format = bfd_plugin_yes; |
0a1b45a2 | 447 | result = true; |
dcf06b89 | 448 | |
dc1e8a47 | 449 | short_circuit: |
dcf06b89 L |
450 | dlclose (plugin_handle); |
451 | return result; | |
ce3c775b NC |
452 | } |
453 | ||
5ae0078c | 454 | /* There may be plugin libraries in lib/bfd-plugins. */ |
99845b3b | 455 | static int has_plugin_list = -1; |
5ae0078c | 456 | |
b21318bd | 457 | static bfd_cleanup (*ld_plugin_object_p) (bfd *, bool); |
5ae0078c | 458 | |
ce3c775b NC |
459 | static const char *plugin_name; |
460 | ||
461 | void | |
462 | bfd_plugin_set_plugin (const char *p) | |
463 | { | |
464 | plugin_name = p; | |
5ae0078c L |
465 | } |
466 | ||
467 | /* Return TRUE if a plugin library is used. */ | |
468 | ||
0a1b45a2 | 469 | bool |
5ae0078c L |
470 | bfd_plugin_specified_p (void) |
471 | { | |
99845b3b | 472 | return plugin_list != NULL; |
5ae0078c L |
473 | } |
474 | ||
7dc3990e L |
475 | /* Return TRUE if ABFD can be claimed by linker LTO plugin. */ |
476 | ||
0a1b45a2 | 477 | bool |
7dc3990e L |
478 | bfd_link_plugin_object_p (bfd *abfd) |
479 | { | |
480 | if (ld_plugin_object_p) | |
b21318bd | 481 | return ld_plugin_object_p (abfd, false) != NULL; |
0a1b45a2 | 482 | return false; |
7dc3990e L |
483 | } |
484 | ||
5ae0078c L |
485 | extern const bfd_target plugin_vec; |
486 | ||
487 | /* Return TRUE if TARGET is a pointer to plugin_vec. */ | |
488 | ||
0a1b45a2 | 489 | bool |
5ae0078c L |
490 | bfd_plugin_target_p (const bfd_target *target) |
491 | { | |
492 | return target == &plugin_vec; | |
493 | } | |
494 | ||
495 | /* Register OBJECT_P to be used by bfd_plugin_object_p. */ | |
496 | ||
497 | void | |
b21318bd | 498 | register_ld_plugin_object_p (bfd_cleanup (*object_p) (bfd *, bool)) |
5ae0078c L |
499 | { |
500 | ld_plugin_object_p = object_p; | |
ce3c775b NC |
501 | } |
502 | ||
99845b3b L |
503 | static void |
504 | build_plugin_list (bfd *abfd) | |
ce3c775b | 505 | { |
41f37a6f AM |
506 | /* The intent was to search ${libdir}/bfd-plugins for plugins, but |
507 | unfortunately the original implementation wasn't precisely that | |
508 | when configuring binutils using --libdir. Search in the proper | |
509 | path first, then the old one for backwards compatibility. */ | |
510 | static const char *path[] | |
511 | = { LIBDIR "/bfd-plugins", BINDIR "/../lib/bfd-plugins" }; | |
512 | struct stat last_st; | |
41f37a6f | 513 | unsigned int i; |
ce3c775b | 514 | |
99845b3b L |
515 | if (has_plugin_list >= 0) |
516 | return; | |
ce3c775b | 517 | |
41f37a6f AM |
518 | /* Try not to search the same dir twice, by looking at st_dev and |
519 | st_ino for the dir. If we are on a file system that always sets | |
520 | st_ino to zero or the actual st_ino is zero we might waste some | |
521 | time, but that doesn't matter too much. */ | |
522 | last_st.st_dev = 0; | |
523 | last_st.st_ino = 0; | |
524 | for (i = 0; i < sizeof (path) / sizeof (path[0]); i++) | |
ce3c775b | 525 | { |
41f37a6f AM |
526 | char *plugin_dir = make_relative_prefix (plugin_program_name, |
527 | BINDIR, | |
528 | path[i]); | |
529 | if (plugin_dir) | |
530 | { | |
531 | struct stat st; | |
532 | DIR *d; | |
533 | ||
534 | if (stat (plugin_dir, &st) == 0 | |
535 | && S_ISDIR (st.st_mode) | |
536 | && !(last_st.st_dev == st.st_dev | |
537 | && last_st.st_ino == st.st_ino | |
538 | && st.st_ino != 0) | |
539 | && (d = opendir (plugin_dir)) != NULL) | |
540 | { | |
541 | struct dirent *ent; | |
542 | ||
543 | last_st.st_dev = st.st_dev; | |
544 | last_st.st_ino = st.st_ino; | |
545 | while ((ent = readdir (d)) != NULL) | |
546 | { | |
547 | char *full_name; | |
548 | ||
549 | full_name = concat (plugin_dir, "/", ent->d_name, NULL); | |
550 | if (stat (full_name, &st) == 0 && S_ISREG (st.st_mode)) | |
0a1b45a2 | 551 | (void) try_load_plugin (full_name, NULL, abfd, true); |
41f37a6f | 552 | free (full_name); |
41f37a6f AM |
553 | } |
554 | closedir (d); | |
555 | } | |
556 | free (plugin_dir); | |
557 | } | |
ce3c775b NC |
558 | } |
559 | ||
99845b3b L |
560 | has_plugin_list = plugin_list != NULL; |
561 | } | |
562 | ||
0a1b45a2 | 563 | static bool |
99845b3b L |
564 | load_plugin (bfd *abfd) |
565 | { | |
566 | struct plugin_list_entry *plugin_list_iter; | |
567 | ||
568 | if (plugin_name) | |
0a1b45a2 | 569 | return try_load_plugin (plugin_name, plugin_list, abfd, false); |
99845b3b L |
570 | |
571 | if (plugin_program_name == NULL) | |
0a1b45a2 | 572 | return false; |
99845b3b L |
573 | |
574 | build_plugin_list (abfd); | |
575 | ||
576 | for (plugin_list_iter = plugin_list; | |
577 | plugin_list_iter; | |
578 | plugin_list_iter = plugin_list_iter->next) | |
0a1b45a2 AM |
579 | if (try_load_plugin (NULL, plugin_list_iter, abfd, false)) |
580 | return true; | |
99845b3b | 581 | |
0a1b45a2 | 582 | return false; |
ce3c775b NC |
583 | } |
584 | ||
585 | ||
cb001c0d | 586 | static bfd_cleanup |
ce3c775b NC |
587 | bfd_plugin_object_p (bfd *abfd) |
588 | { | |
5ae0078c | 589 | if (ld_plugin_object_p) |
b21318bd | 590 | return ld_plugin_object_p (abfd, false); |
5ae0078c | 591 | |
49f30d83 | 592 | if (abfd->plugin_format == bfd_plugin_unknown && !load_plugin (abfd)) |
ce3c775b NC |
593 | return NULL; |
594 | ||
cb001c0d | 595 | return abfd->plugin_format == bfd_plugin_yes ? _bfd_no_cleanup : NULL; |
ce3c775b NC |
596 | } |
597 | ||
598 | /* Copy any private info we understand from the input bfd | |
599 | to the output bfd. */ | |
600 | ||
0a1b45a2 | 601 | static bool |
ce3c775b NC |
602 | bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED, |
603 | bfd *obfd ATTRIBUTE_UNUSED) | |
604 | { | |
605 | BFD_ASSERT (0); | |
0a1b45a2 | 606 | return true; |
ce3c775b NC |
607 | } |
608 | ||
609 | /* Copy any private info we understand from the input section | |
610 | to the output section. */ | |
611 | ||
0a1b45a2 | 612 | static bool |
ce3c775b NC |
613 | bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED, |
614 | asection *isection ATTRIBUTE_UNUSED, | |
615 | bfd *obfd ATTRIBUTE_UNUSED, | |
616 | asection *osection ATTRIBUTE_UNUSED) | |
617 | { | |
618 | BFD_ASSERT (0); | |
0a1b45a2 | 619 | return true; |
ce3c775b NC |
620 | } |
621 | ||
622 | /* Copy any private info we understand from the input symbol | |
623 | to the output symbol. */ | |
624 | ||
0a1b45a2 | 625 | static bool |
ce3c775b NC |
626 | bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED, |
627 | asymbol *isymbol ATTRIBUTE_UNUSED, | |
628 | bfd *obfd ATTRIBUTE_UNUSED, | |
629 | asymbol *osymbol ATTRIBUTE_UNUSED) | |
630 | { | |
631 | BFD_ASSERT (0); | |
0a1b45a2 | 632 | return true; |
ce3c775b NC |
633 | } |
634 | ||
0a1b45a2 | 635 | static bool |
f3b9cfd1 | 636 | bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, void *ptr ATTRIBUTE_UNUSED) |
ce3c775b NC |
637 | { |
638 | BFD_ASSERT (0); | |
0a1b45a2 | 639 | return true; |
ce3c775b NC |
640 | } |
641 | ||
642 | static char * | |
643 | bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED) | |
644 | { | |
645 | BFD_ASSERT (0); | |
646 | return NULL; | |
647 | } | |
648 | ||
649 | static int | |
650 | bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) | |
261b8d08 PA |
651 | { |
652 | BFD_ASSERT (0); | |
653 | return 0; | |
654 | } | |
655 | ||
656 | static int | |
657 | bfd_plugin_core_file_pid (bfd *abfd ATTRIBUTE_UNUSED) | |
ce3c775b NC |
658 | { |
659 | BFD_ASSERT (0); | |
660 | return 0; | |
661 | } | |
662 | ||
663 | static long | |
664 | bfd_plugin_get_symtab_upper_bound (bfd *abfd) | |
665 | { | |
666 | struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data; | |
667 | long nsyms = plugin_data->nsyms; | |
668 | ||
669 | BFD_ASSERT (nsyms >= 0); | |
670 | ||
671 | return ((nsyms + 1) * sizeof (asymbol *)); | |
672 | } | |
673 | ||
674 | static flagword | |
675 | convert_flags (const struct ld_plugin_symbol *sym) | |
676 | { | |
677 | switch (sym->def) | |
68ffbac6 | 678 | { |
ce3c775b NC |
679 | case LDPK_DEF: |
680 | case LDPK_COMMON: | |
681 | case LDPK_UNDEF: | |
682 | return BSF_GLOBAL; | |
683 | ||
684 | case LDPK_WEAKUNDEF: | |
685 | case LDPK_WEAKDEF: | |
686 | return BSF_GLOBAL | BSF_WEAK; | |
687 | ||
688 | default: | |
689 | BFD_ASSERT (0); | |
690 | return 0; | |
691 | } | |
692 | } | |
693 | ||
694 | static long | |
695 | bfd_plugin_canonicalize_symtab (bfd *abfd, | |
696 | asymbol **alocation) | |
697 | { | |
698 | struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data; | |
699 | long nsyms = plugin_data->nsyms; | |
700 | const struct ld_plugin_symbol *syms = plugin_data->syms; | |
c3a1714c L |
701 | static asection fake_text_section |
702 | = BFD_FAKE_SECTION (fake_text_section, NULL, "plug", 0, | |
a288c270 | 703 | SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS); |
c3a1714c L |
704 | static asection fake_data_section |
705 | = BFD_FAKE_SECTION (fake_data_section, NULL, "plug", 0, | |
706 | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS); | |
707 | static asection fake_bss_section | |
708 | = BFD_FAKE_SECTION (fake_bss_section, NULL, "plug", 0, | |
709 | SEC_ALLOC); | |
a288c270 AM |
710 | static asection fake_common_section |
711 | = BFD_FAKE_SECTION (fake_common_section, NULL, "plug", 0, SEC_IS_COMMON); | |
3d98c460 | 712 | int i; |
ce3c775b | 713 | |
ce3c775b NC |
714 | for (i = 0; i < nsyms; i++) |
715 | { | |
68ffbac6 | 716 | asymbol *s = bfd_alloc (abfd, sizeof (asymbol)); |
ce3c775b NC |
717 | |
718 | BFD_ASSERT (s); | |
719 | alocation[i] = s; | |
720 | ||
721 | s->the_bfd = abfd; | |
722 | s->name = syms[i].name; | |
723 | s->value = 0; | |
724 | s->flags = convert_flags (&syms[i]); | |
725 | switch (syms[i].def) | |
726 | { | |
727 | case LDPK_COMMON: | |
728 | s->section = &fake_common_section; | |
729 | break; | |
730 | case LDPK_UNDEF: | |
731 | case LDPK_WEAKUNDEF: | |
732 | s->section = bfd_und_section_ptr; | |
733 | break; | |
734 | case LDPK_DEF: | |
735 | case LDPK_WEAKDEF: | |
c3a1714c L |
736 | if (current_plugin->has_symbol_type) |
737 | switch (syms[i].symbol_type) | |
738 | { | |
b5ffa918 NC |
739 | default: |
740 | /* FIXME: Should we issue an error here ? */ | |
c3a1714c L |
741 | case LDST_UNKNOWN: |
742 | /* What is the best fake section for LDST_UNKNOWN? */ | |
743 | case LDST_FUNCTION: | |
744 | s->section = &fake_text_section; | |
745 | break; | |
746 | case LDST_VARIABLE: | |
747 | if (syms[i].section_kind == LDSSK_BSS) | |
748 | s->section = &fake_bss_section; | |
749 | else | |
750 | s->section = &fake_data_section; | |
751 | break; | |
752 | } | |
753 | else | |
3d98c460 | 754 | s->section = &fake_text_section; |
ce3c775b NC |
755 | break; |
756 | default: | |
757 | BFD_ASSERT (0); | |
758 | } | |
759 | ||
760 | s->udata.p = (void *) &syms[i]; | |
761 | } | |
762 | ||
763 | return nsyms; | |
764 | } | |
765 | ||
766 | static void | |
767 | bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED, | |
f3b9cfd1 | 768 | void *afile ATTRIBUTE_UNUSED, |
ce3c775b NC |
769 | asymbol *symbol ATTRIBUTE_UNUSED, |
770 | bfd_print_symbol_type how ATTRIBUTE_UNUSED) | |
771 | { | |
772 | BFD_ASSERT (0); | |
773 | } | |
774 | ||
775 | static void | |
776 | bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, | |
777 | asymbol *symbol, | |
778 | symbol_info *ret) | |
779 | { | |
780 | bfd_symbol_info (symbol, ret); | |
781 | } | |
782 | ||
783 | /* Make an empty symbol. */ | |
784 | ||
785 | static asymbol * | |
786 | bfd_plugin_make_empty_symbol (bfd *abfd) | |
787 | { | |
d3ce72d0 NC |
788 | asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol)); |
789 | if (new_symbol == NULL) | |
790 | return new_symbol; | |
791 | new_symbol->the_bfd = abfd; | |
792 | return new_symbol; | |
ce3c775b NC |
793 | } |
794 | ||
795 | static int | |
796 | bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED, | |
797 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
798 | { | |
799 | BFD_ASSERT (0); | |
800 | return 0; | |
801 | } | |
802 | ||
ce3c775b NC |
803 | const bfd_target plugin_vec = |
804 | { | |
805 | "plugin", /* Name. */ | |
806 | bfd_target_unknown_flavour, | |
807 | BFD_ENDIAN_LITTLE, /* Target byte order. */ | |
808 | BFD_ENDIAN_LITTLE, /* Target headers byte order. */ | |
809 | (HAS_RELOC | EXEC_P | /* Object flags. */ | |
810 | HAS_LINENO | HAS_DEBUG | | |
811 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), | |
812 | (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS | |
813 | | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags. */ | |
814 | 0, /* symbol_leading_char. */ | |
815 | '/', /* ar_pad_char. */ | |
816 | 15, /* ar_max_namelen. */ | |
64bfc258 | 817 | 255, /* match priority. */ |
d1bcae83 | 818 | TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */ |
ce3c775b NC |
819 | |
820 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
821 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
822 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
823 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
824 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
825 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
826 | ||
827 | { /* bfd_check_format. */ | |
828 | _bfd_dummy_target, | |
829 | bfd_plugin_object_p, | |
830 | bfd_generic_archive_p, | |
831 | _bfd_dummy_target | |
832 | }, | |
833 | { /* bfd_set_format. */ | |
d00dd7dc AM |
834 | _bfd_bool_bfd_false_error, |
835 | _bfd_bool_bfd_false_error, | |
ce3c775b | 836 | _bfd_generic_mkarchive, |
d00dd7dc | 837 | _bfd_bool_bfd_false_error, |
ce3c775b NC |
838 | }, |
839 | { /* bfd_write_contents. */ | |
d00dd7dc AM |
840 | _bfd_bool_bfd_false_error, |
841 | _bfd_bool_bfd_false_error, | |
ce3c775b | 842 | _bfd_write_archive_contents, |
d00dd7dc | 843 | _bfd_bool_bfd_false_error, |
ce3c775b NC |
844 | }, |
845 | ||
846 | BFD_JUMP_TABLE_GENERIC (bfd_plugin), | |
847 | BFD_JUMP_TABLE_COPY (bfd_plugin), | |
848 | BFD_JUMP_TABLE_CORE (bfd_plugin), | |
e6cc316a L |
849 | #ifdef USE_64_BIT_ARCHIVE |
850 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_64_bit), | |
851 | #else | |
ce3c775b | 852 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
e6cc316a | 853 | #endif |
ce3c775b NC |
854 | BFD_JUMP_TABLE_SYMBOLS (bfd_plugin), |
855 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
856 | BFD_JUMP_TABLE_WRITE (bfd_plugin), | |
857 | BFD_JUMP_TABLE_LINK (bfd_plugin), | |
858 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
859 | ||
860 | NULL, | |
861 | ||
07d6d2b8 | 862 | NULL /* backend_data. */ |
ce3c775b | 863 | }; |
1e927850 | 864 | #endif /* BFD_SUPPORTS_PLUGINS */ |