Commit | Line | Data |
---|---|---|
ce3c775b | 1 | /* Plugin support for BFD. |
0aabe54e | 2 | Copyright 2009, 2010, 2011 |
ce3c775b NC |
3 | Free Software Foundation, Inc. |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
21 | ||
22 | #include "config.h" | |
98950613 AM |
23 | #include "bfd.h" |
24 | ||
25 | #if BFD_SUPPORTS_PLUGINS | |
26 | ||
ce3c775b NC |
27 | #include <assert.h> |
28 | #include <dlfcn.h> | |
29 | #include <stdarg.h> | |
30 | #include "plugin-api.h" | |
31 | #include "sysdep.h" | |
32 | #include "plugin.h" | |
33 | #include "libbfd.h" | |
34 | #include "libiberty.h" | |
35 | #include <dirent.h> | |
36 | ||
37 | #define bfd_plugin_close_and_cleanup _bfd_generic_close_and_cleanup | |
38 | #define bfd_plugin_bfd_free_cached_info _bfd_generic_bfd_free_cached_info | |
39 | #define bfd_plugin_new_section_hook _bfd_generic_new_section_hook | |
40 | #define bfd_plugin_get_section_contents _bfd_generic_get_section_contents | |
41 | #define bfd_plugin_get_section_contents_in_window _bfd_generic_get_section_contents_in_window | |
42 | #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data | |
43 | #define bfd_plugin_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data | |
44 | #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data | |
45 | #define bfd_plugin_bfd_set_private_flags _bfd_generic_bfd_set_private_flags | |
46 | #define bfd_plugin_core_file_matches_executable_p generic_core_file_matches_executable_p | |
47 | #define bfd_plugin_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name | |
48 | #define bfd_plugin_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) | |
49 | #define bfd_plugin_get_lineno _bfd_nosymbols_get_lineno | |
50 | #define bfd_plugin_find_nearest_line _bfd_nosymbols_find_nearest_line | |
51 | #define bfd_plugin_find_inliner_info _bfd_nosymbols_find_inliner_info | |
52 | #define bfd_plugin_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol | |
53 | #define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols | |
54 | #define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol | |
55 | #define bfd_plugin_set_arch_mach bfd_default_set_arch_mach | |
56 | #define bfd_plugin_set_section_contents _bfd_generic_set_section_contents | |
57 | #define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents | |
58 | #define bfd_plugin_bfd_relax_section bfd_generic_relax_section | |
59 | #define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create | |
60 | #define bfd_plugin_bfd_link_hash_table_free _bfd_generic_link_hash_table_free | |
61 | #define bfd_plugin_bfd_link_add_symbols _bfd_generic_link_add_symbols | |
62 | #define bfd_plugin_bfd_link_just_syms _bfd_generic_link_just_syms | |
63 | #define bfd_plugin_bfd_final_link _bfd_generic_final_link | |
64 | #define bfd_plugin_bfd_link_split_section _bfd_generic_link_split_section | |
65 | #define bfd_plugin_bfd_gc_sections bfd_generic_gc_sections | |
66 | #define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections | |
67 | #define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section | |
68 | #define bfd_plugin_bfd_discard_group bfd_generic_discard_group | |
69 | #define bfd_plugin_section_already_linked _bfd_generic_section_already_linked | |
70 | #define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol | |
69a630b5 | 71 | #define bfd_plugin_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type |
ce3c775b NC |
72 | |
73 | static enum ld_plugin_status | |
74 | message (int level ATTRIBUTE_UNUSED, | |
75 | const char * format, ...) | |
76 | { | |
77 | va_list args; | |
78 | va_start (args, format); | |
79 | printf ("bfd plugin: "); | |
80 | vprintf (format, args); | |
d9b21463 | 81 | putchar ('\n'); |
ce3c775b NC |
82 | va_end (args); |
83 | return LDPS_OK; | |
84 | } | |
85 | ||
86 | /* Register a claim-file handler. */ | |
87 | static ld_plugin_claim_file_handler claim_file; | |
88 | ||
89 | static enum ld_plugin_status | |
90 | register_claim_file (ld_plugin_claim_file_handler handler) | |
91 | { | |
92 | claim_file = handler; | |
93 | return LDPS_OK; | |
94 | } | |
95 | ||
96 | static enum ld_plugin_status | |
97 | add_symbols (void * handle, | |
98 | int nsyms, | |
99 | const struct ld_plugin_symbol * syms) | |
100 | { | |
101 | bfd *abfd = handle; | |
102 | struct plugin_data_struct *plugin_data = | |
103 | bfd_alloc (abfd, sizeof (plugin_data_struct));; | |
104 | ||
105 | plugin_data->nsyms = nsyms; | |
106 | plugin_data->syms = syms; | |
107 | ||
108 | if (nsyms != 0) | |
109 | abfd->flags |= HAS_SYMS; | |
110 | ||
111 | abfd->tdata.plugin_data = plugin_data; | |
112 | return LDPS_OK; | |
113 | } | |
114 | ||
fc579192 NC |
115 | static const char *plugin_program_name; |
116 | ||
117 | void | |
118 | bfd_plugin_set_program_name (const char *program_name) | |
119 | { | |
120 | plugin_program_name = program_name; | |
121 | } | |
ce3c775b NC |
122 | |
123 | static int | |
124 | try_load_plugin (const char *pname) | |
125 | { | |
126 | static void *plugin_handle; | |
127 | int tv_size = 4; | |
128 | struct ld_plugin_tv tv[tv_size]; | |
129 | int i; | |
130 | ld_plugin_onload onload; | |
131 | enum ld_plugin_status status; | |
132 | ||
133 | plugin_handle = dlopen (pname, RTLD_NOW); | |
134 | if (!plugin_handle) | |
135 | { | |
136 | (*_bfd_error_handler)("%s\n", dlerror ()); | |
137 | return 0; | |
138 | } | |
139 | ||
140 | onload = dlsym (plugin_handle, "onload"); | |
141 | if (!onload) | |
142 | goto err; | |
143 | ||
144 | i = 0; | |
145 | tv[i].tv_tag = LDPT_MESSAGE; | |
146 | tv[i].tv_u.tv_message = message; | |
147 | ||
148 | ++i; | |
149 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
150 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
151 | ||
152 | ++i; | |
153 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
154 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
155 | ||
156 | ++i; | |
157 | tv[i].tv_tag = LDPT_NULL; | |
158 | tv[i].tv_u.tv_val = 0; | |
159 | ||
160 | status = (*onload)(tv); | |
161 | ||
162 | if (status != LDPS_OK) | |
163 | goto err; | |
164 | ||
165 | if (!claim_file) | |
166 | goto err; | |
167 | ||
168 | return 1; | |
169 | ||
170 | err: | |
171 | plugin_handle = NULL; | |
172 | return 0; | |
173 | } | |
174 | ||
175 | static const char *plugin_name; | |
176 | ||
177 | void | |
178 | bfd_plugin_set_plugin (const char *p) | |
179 | { | |
180 | plugin_name = p; | |
181 | } | |
182 | ||
183 | static int | |
184 | load_plugin (void) | |
185 | { | |
186 | char *plugin_dir; | |
187 | char *p; | |
188 | DIR *d; | |
189 | struct dirent *ent; | |
190 | int found = 0; | |
191 | ||
192 | if (plugin_name) | |
193 | return try_load_plugin (plugin_name); | |
194 | ||
fc579192 | 195 | if (plugin_program_name == NULL) |
ce3c775b NC |
196 | return 0; |
197 | ||
198 | plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL); | |
fc579192 | 199 | p = make_relative_prefix (plugin_program_name, |
ce3c775b NC |
200 | BINDIR, |
201 | plugin_dir); | |
202 | free (plugin_dir); | |
203 | plugin_dir = NULL; | |
204 | ||
205 | d = opendir (p); | |
206 | if (!d) | |
207 | goto out; | |
208 | ||
209 | while ((ent = readdir (d))) | |
210 | { | |
211 | char *full_name; | |
c41ba836 | 212 | struct stat s; |
ce3c775b NC |
213 | |
214 | full_name = concat (p, "/", ent->d_name, NULL); | |
c41ba836 DK |
215 | if (stat(full_name, &s) == 0 && S_ISREG (s.st_mode)) |
216 | found = try_load_plugin (full_name); | |
ce3c775b NC |
217 | free (full_name); |
218 | if (found) | |
219 | break; | |
220 | } | |
221 | ||
222 | out: | |
223 | free (p); | |
224 | if (d) | |
225 | closedir (d); | |
226 | ||
227 | return found; | |
228 | } | |
229 | ||
230 | ||
231 | static const bfd_target * | |
232 | bfd_plugin_object_p (bfd *abfd) | |
233 | { | |
234 | int claimed = 0; | |
ce3c775b | 235 | struct ld_plugin_input_file file; |
028ed2b2 | 236 | bfd *iobfd; |
80549d04 RÁE |
237 | static int have_loaded = 0; |
238 | static int have_plugin = 0; | |
028ed2b2 | 239 | |
80549d04 RÁE |
240 | if (!have_loaded) |
241 | { | |
242 | have_loaded = 1; | |
243 | have_plugin = load_plugin (); | |
244 | } | |
245 | if (!have_plugin) | |
ce3c775b NC |
246 | return NULL; |
247 | ||
248 | file.name = abfd->filename; | |
249 | ||
028ed2b2 | 250 | if (abfd->my_archive) |
ce3c775b | 251 | { |
028ed2b2 L |
252 | iobfd = abfd->my_archive; |
253 | file.offset = abfd->origin; | |
254 | file.filesize = arelt_size (abfd); | |
ce3c775b NC |
255 | } |
256 | else | |
257 | { | |
028ed2b2 L |
258 | iobfd = abfd; |
259 | file.offset = 0; | |
80549d04 | 260 | file.filesize = 0; |
ce3c775b | 261 | } |
028ed2b2 L |
262 | |
263 | if (!iobfd->iostream && !bfd_open_file (iobfd)) | |
264 | return NULL; | |
265 | ||
266 | file.fd = fileno ((FILE *) iobfd->iostream); | |
267 | ||
80549d04 RÁE |
268 | if (!abfd->my_archive) |
269 | { | |
270 | struct stat stat_buf; | |
271 | if (fstat (file.fd, &stat_buf)) | |
272 | return NULL; | |
273 | file.filesize = stat_buf.st_size; | |
274 | } | |
275 | ||
ce3c775b | 276 | file.handle = abfd; |
80549d04 | 277 | off_t cur_offset = lseek(file.fd, 0, SEEK_CUR); |
ce3c775b | 278 | claim_file (&file, &claimed); |
80549d04 | 279 | lseek(file.fd, cur_offset, SEEK_SET); |
ce3c775b NC |
280 | if (!claimed) |
281 | return NULL; | |
282 | ||
283 | return abfd->xvec; | |
284 | } | |
285 | ||
286 | /* Copy any private info we understand from the input bfd | |
287 | to the output bfd. */ | |
288 | ||
289 | static bfd_boolean | |
290 | bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED, | |
291 | bfd *obfd ATTRIBUTE_UNUSED) | |
292 | { | |
293 | BFD_ASSERT (0); | |
294 | return TRUE; | |
295 | } | |
296 | ||
297 | /* Copy any private info we understand from the input section | |
298 | to the output section. */ | |
299 | ||
300 | static bfd_boolean | |
301 | bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED, | |
302 | asection *isection ATTRIBUTE_UNUSED, | |
303 | bfd *obfd ATTRIBUTE_UNUSED, | |
304 | asection *osection ATTRIBUTE_UNUSED) | |
305 | { | |
306 | BFD_ASSERT (0); | |
307 | return TRUE; | |
308 | } | |
309 | ||
310 | /* Copy any private info we understand from the input symbol | |
311 | to the output symbol. */ | |
312 | ||
313 | static bfd_boolean | |
314 | bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED, | |
315 | asymbol *isymbol ATTRIBUTE_UNUSED, | |
316 | bfd *obfd ATTRIBUTE_UNUSED, | |
317 | asymbol *osymbol ATTRIBUTE_UNUSED) | |
318 | { | |
319 | BFD_ASSERT (0); | |
320 | return TRUE; | |
321 | } | |
322 | ||
323 | static bfd_boolean | |
324 | bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, PTR ptr ATTRIBUTE_UNUSED) | |
325 | { | |
326 | BFD_ASSERT (0); | |
327 | return TRUE; | |
328 | } | |
329 | ||
330 | static char * | |
331 | bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED) | |
332 | { | |
333 | BFD_ASSERT (0); | |
334 | return NULL; | |
335 | } | |
336 | ||
337 | static int | |
338 | bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) | |
261b8d08 PA |
339 | { |
340 | BFD_ASSERT (0); | |
341 | return 0; | |
342 | } | |
343 | ||
344 | static int | |
345 | bfd_plugin_core_file_pid (bfd *abfd ATTRIBUTE_UNUSED) | |
ce3c775b NC |
346 | { |
347 | BFD_ASSERT (0); | |
348 | return 0; | |
349 | } | |
350 | ||
351 | static long | |
352 | bfd_plugin_get_symtab_upper_bound (bfd *abfd) | |
353 | { | |
354 | struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data; | |
355 | long nsyms = plugin_data->nsyms; | |
356 | ||
357 | BFD_ASSERT (nsyms >= 0); | |
358 | ||
359 | return ((nsyms + 1) * sizeof (asymbol *)); | |
360 | } | |
361 | ||
362 | static flagword | |
363 | convert_flags (const struct ld_plugin_symbol *sym) | |
364 | { | |
365 | switch (sym->def) | |
366 | { | |
367 | case LDPK_DEF: | |
368 | case LDPK_COMMON: | |
369 | case LDPK_UNDEF: | |
370 | return BSF_GLOBAL; | |
371 | ||
372 | case LDPK_WEAKUNDEF: | |
373 | case LDPK_WEAKDEF: | |
374 | return BSF_GLOBAL | BSF_WEAK; | |
375 | ||
376 | default: | |
377 | BFD_ASSERT (0); | |
378 | return 0; | |
379 | } | |
380 | } | |
381 | ||
382 | static long | |
383 | bfd_plugin_canonicalize_symtab (bfd *abfd, | |
384 | asymbol **alocation) | |
385 | { | |
386 | struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data; | |
387 | long nsyms = plugin_data->nsyms; | |
388 | const struct ld_plugin_symbol *syms = plugin_data->syms; | |
389 | static asection fake_section; | |
390 | static asection fake_common_section; | |
391 | int i; | |
392 | ||
393 | fake_section.name = ".text"; | |
394 | fake_common_section.flags = SEC_IS_COMMON; | |
395 | ||
396 | for (i = 0; i < nsyms; i++) | |
397 | { | |
398 | asymbol *s = bfd_alloc (abfd, sizeof (asymbol)); | |
399 | ||
400 | BFD_ASSERT (s); | |
401 | alocation[i] = s; | |
402 | ||
403 | s->the_bfd = abfd; | |
404 | s->name = syms[i].name; | |
405 | s->value = 0; | |
406 | s->flags = convert_flags (&syms[i]); | |
407 | switch (syms[i].def) | |
408 | { | |
409 | case LDPK_COMMON: | |
410 | s->section = &fake_common_section; | |
411 | break; | |
412 | case LDPK_UNDEF: | |
413 | case LDPK_WEAKUNDEF: | |
414 | s->section = bfd_und_section_ptr; | |
415 | break; | |
416 | case LDPK_DEF: | |
417 | case LDPK_WEAKDEF: | |
418 | s->section = &fake_section; | |
419 | break; | |
420 | default: | |
421 | BFD_ASSERT (0); | |
422 | } | |
423 | ||
424 | s->udata.p = (void *) &syms[i]; | |
425 | } | |
426 | ||
427 | return nsyms; | |
428 | } | |
429 | ||
430 | static void | |
431 | bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED, | |
432 | PTR afile ATTRIBUTE_UNUSED, | |
433 | asymbol *symbol ATTRIBUTE_UNUSED, | |
434 | bfd_print_symbol_type how ATTRIBUTE_UNUSED) | |
435 | { | |
436 | BFD_ASSERT (0); | |
437 | } | |
438 | ||
439 | static void | |
440 | bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, | |
441 | asymbol *symbol, | |
442 | symbol_info *ret) | |
443 | { | |
444 | bfd_symbol_info (symbol, ret); | |
445 | } | |
446 | ||
447 | /* Make an empty symbol. */ | |
448 | ||
449 | static asymbol * | |
450 | bfd_plugin_make_empty_symbol (bfd *abfd) | |
451 | { | |
d3ce72d0 NC |
452 | asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol)); |
453 | if (new_symbol == NULL) | |
454 | return new_symbol; | |
455 | new_symbol->the_bfd = abfd; | |
456 | return new_symbol; | |
ce3c775b NC |
457 | } |
458 | ||
459 | static int | |
460 | bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED, | |
461 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
462 | { | |
463 | BFD_ASSERT (0); | |
464 | return 0; | |
465 | } | |
466 | ||
ce3c775b NC |
467 | const bfd_target plugin_vec = |
468 | { | |
469 | "plugin", /* Name. */ | |
470 | bfd_target_unknown_flavour, | |
471 | BFD_ENDIAN_LITTLE, /* Target byte order. */ | |
472 | BFD_ENDIAN_LITTLE, /* Target headers byte order. */ | |
473 | (HAS_RELOC | EXEC_P | /* Object flags. */ | |
474 | HAS_LINENO | HAS_DEBUG | | |
475 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), | |
476 | (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS | |
477 | | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags. */ | |
478 | 0, /* symbol_leading_char. */ | |
479 | '/', /* ar_pad_char. */ | |
480 | 15, /* ar_max_namelen. */ | |
0aabe54e | 481 | 0, /* match priority. */ |
ce3c775b NC |
482 | |
483 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
484 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
485 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
486 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
487 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
488 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
489 | ||
490 | { /* bfd_check_format. */ | |
491 | _bfd_dummy_target, | |
492 | bfd_plugin_object_p, | |
493 | bfd_generic_archive_p, | |
494 | _bfd_dummy_target | |
495 | }, | |
496 | { /* bfd_set_format. */ | |
497 | bfd_false, | |
4846b70a | 498 | bfd_false, |
ce3c775b NC |
499 | _bfd_generic_mkarchive, |
500 | bfd_false, | |
501 | }, | |
502 | { /* bfd_write_contents. */ | |
503 | bfd_false, | |
504 | bfd_false, | |
505 | _bfd_write_archive_contents, | |
506 | bfd_false, | |
507 | }, | |
508 | ||
509 | BFD_JUMP_TABLE_GENERIC (bfd_plugin), | |
510 | BFD_JUMP_TABLE_COPY (bfd_plugin), | |
511 | BFD_JUMP_TABLE_CORE (bfd_plugin), | |
512 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
513 | BFD_JUMP_TABLE_SYMBOLS (bfd_plugin), | |
514 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
515 | BFD_JUMP_TABLE_WRITE (bfd_plugin), | |
516 | BFD_JUMP_TABLE_LINK (bfd_plugin), | |
517 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
518 | ||
519 | NULL, | |
520 | ||
521 | NULL /* backend_data. */ | |
522 | }; | |
98950613 | 523 | #endif /* BFD_SUPPORTS_PLUGIN */ |