Commit | Line | Data |
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5d3236ee | 1 | /* Plugin control for the GNU linker. |
b90efa5b | 2 | Copyright (C) 2010-2015 Free Software Foundation, Inc. |
5d3236ee DK |
3 | |
4 | This file is part of the GNU Binutils. | |
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 | ||
21 | #include "sysdep.h" | |
22 | #include "libiberty.h" | |
23 | #include "bfd.h" | |
35a1e5f3 | 24 | #include "libbfd.h" |
5d3236ee DK |
25 | #include "bfdlink.h" |
26 | #include "bfdver.h" | |
27 | #include "ld.h" | |
28 | #include "ldmain.h" | |
29 | #include "ldmisc.h" | |
30 | #include "ldexp.h" | |
31 | #include "ldlang.h" | |
32 | #include "ldfile.h" | |
33 | #include "plugin.h" | |
34 | #include "plugin-api.h" | |
35 | #include "elf-bfd.h" | |
2aec968d L |
36 | #if HAVE_MMAP |
37 | # include <sys/mman.h> | |
38 | # ifndef MAP_FAILED | |
39 | # define MAP_FAILED ((void *) -1) | |
40 | # endif | |
41 | # ifndef PROT_READ | |
42 | # define PROT_READ 0 | |
43 | # endif | |
44 | # ifndef MAP_PRIVATE | |
45 | # define MAP_PRIVATE 0 | |
46 | # endif | |
47 | #endif | |
f4b78d18 L |
48 | #include <errno.h> |
49 | #if !(defined(errno) || defined(_MSC_VER) && defined(_INC_ERRNO)) | |
50 | extern int errno; | |
51 | #endif | |
3917d5d5 | 52 | #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) |
f31d24a0 | 53 | #include <windows.h> |
3917d5d5 | 54 | #endif |
5d3236ee | 55 | |
1715a13c L |
56 | /* Report plugin symbols. */ |
57 | bfd_boolean report_plugin_symbols; | |
58 | ||
5d3236ee DK |
59 | /* The suffix to append to the name of the real (claimed) object file |
60 | when generating a dummy BFD to hold the IR symbols sent from the | |
cf4dc96f DK |
61 | plugin. For cosmetic use only; appears in maps, crefs etc. */ |
62 | #define IRONLY_SUFFIX " (symbol from plugin)" | |
5d3236ee DK |
63 | |
64 | /* Stores a single argument passed to a plugin. */ | |
65 | typedef struct plugin_arg | |
66 | { | |
67 | struct plugin_arg *next; | |
68 | const char *arg; | |
69 | } plugin_arg_t; | |
70 | ||
71 | /* Holds all details of a single plugin. */ | |
72 | typedef struct plugin | |
73 | { | |
74 | /* Next on the list of plugins, or NULL at end of chain. */ | |
75 | struct plugin *next; | |
76 | /* The argument string given to --plugin. */ | |
77 | const char *name; | |
78 | /* The shared library handle returned by dlopen. */ | |
79 | void *dlhandle; | |
80 | /* The list of argument string given to --plugin-opt. */ | |
81 | plugin_arg_t *args; | |
82 | /* Number of args in the list, for convenience. */ | |
83 | size_t n_args; | |
84 | /* The plugin's event handlers. */ | |
85 | ld_plugin_claim_file_handler claim_file_handler; | |
86 | ld_plugin_all_symbols_read_handler all_symbols_read_handler; | |
87 | ld_plugin_cleanup_handler cleanup_handler; | |
88 | /* TRUE if the cleanup handlers have been called. */ | |
89 | bfd_boolean cleanup_done; | |
90 | } plugin_t; | |
91 | ||
2aec968d L |
92 | typedef struct view_buffer |
93 | { | |
94 | char *addr; | |
95 | size_t filesize; | |
96 | off_t offset; | |
97 | } view_buffer_t; | |
98 | ||
f4b78d18 L |
99 | /* The internal version of struct ld_plugin_input_file with a BFD |
100 | pointer. */ | |
101 | typedef struct plugin_input_file | |
102 | { | |
103 | bfd *abfd; | |
2aec968d | 104 | view_buffer_t view_buffer; |
f4b78d18 L |
105 | char *name; |
106 | int fd; | |
107 | off_t offset; | |
108 | off_t filesize; | |
109 | } plugin_input_file_t; | |
110 | ||
5d3236ee DK |
111 | /* The master list of all plugins. */ |
112 | static plugin_t *plugins_list = NULL; | |
113 | ||
114 | /* We keep a tail pointer for easy linking on the end. */ | |
115 | static plugin_t **plugins_tail_chain_ptr = &plugins_list; | |
116 | ||
117 | /* The last plugin added to the list, for receiving args. */ | |
118 | static plugin_t *last_plugin = NULL; | |
119 | ||
120 | /* The tail of the arg chain of the last plugin added to the list. */ | |
121 | static plugin_arg_t **last_plugin_args_tail_chain_ptr = NULL; | |
122 | ||
123 | /* The plugin which is currently having a callback executed. */ | |
124 | static plugin_t *called_plugin = NULL; | |
125 | ||
126 | /* Last plugin to cause an error, if any. */ | |
127 | static const char *error_plugin = NULL; | |
128 | ||
24f58f47 | 129 | /* State of linker "notice" interface before we poked at it. */ |
9e2278f5 | 130 | static bfd_boolean orig_notice_all; |
9e2278f5 AM |
131 | |
132 | /* Original linker callbacks, and the plugin version. */ | |
133 | static const struct bfd_link_callbacks *orig_callbacks; | |
134 | static struct bfd_link_callbacks plugin_callbacks; | |
135 | ||
5d3236ee DK |
136 | /* Set at all symbols read time, to avoid recursively offering the plugin |
137 | its own newly-added input files and libs to claim. */ | |
9e2278f5 | 138 | bfd_boolean no_more_claiming = FALSE; |
5d3236ee DK |
139 | |
140 | /* List of tags to set in the constant leading part of the tv array. */ | |
141 | static const enum ld_plugin_tag tv_header_tags[] = | |
142 | { | |
143 | LDPT_MESSAGE, | |
144 | LDPT_API_VERSION, | |
145 | LDPT_GNU_LD_VERSION, | |
146 | LDPT_LINKER_OUTPUT, | |
147 | LDPT_OUTPUT_NAME, | |
148 | LDPT_REGISTER_CLAIM_FILE_HOOK, | |
149 | LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK, | |
150 | LDPT_REGISTER_CLEANUP_HOOK, | |
151 | LDPT_ADD_SYMBOLS, | |
152 | LDPT_GET_INPUT_FILE, | |
15f7a26b | 153 | LDPT_GET_VIEW, |
5d3236ee DK |
154 | LDPT_RELEASE_INPUT_FILE, |
155 | LDPT_GET_SYMBOLS, | |
69ee6ab2 | 156 | LDPT_GET_SYMBOLS_V2, |
5d3236ee DK |
157 | LDPT_ADD_INPUT_FILE, |
158 | LDPT_ADD_INPUT_LIBRARY, | |
159 | LDPT_SET_EXTRA_LIBRARY_PATH | |
160 | }; | |
161 | ||
162 | /* How many entries in the constant leading part of the tv array. */ | |
163 | static const size_t tv_header_size = ARRAY_SIZE (tv_header_tags); | |
164 | ||
9e2278f5 | 165 | /* Forward references. */ |
16d96b5b | 166 | static bfd_boolean plugin_notice (struct bfd_link_info *, |
46135103 AM |
167 | struct bfd_link_hash_entry *, |
168 | struct bfd_link_hash_entry *, | |
169 | bfd *, asection *, bfd_vma, flagword); | |
9e2278f5 | 170 | |
3917d5d5 DK |
171 | #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) |
172 | ||
173 | #define RTLD_NOW 0 /* Dummy value. */ | |
174 | ||
175 | static void * | |
176 | dlopen (const char *file, int mode ATTRIBUTE_UNUSED) | |
177 | { | |
178 | return LoadLibrary (file); | |
179 | } | |
180 | ||
181 | static void * | |
182 | dlsym (void *handle, const char *name) | |
183 | { | |
184 | return GetProcAddress (handle, name); | |
185 | } | |
186 | ||
187 | static int | |
188 | dlclose (void *handle) | |
189 | { | |
190 | FreeLibrary (handle); | |
191 | return 0; | |
192 | } | |
193 | ||
194 | #endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */ | |
195 | ||
d82184d7 L |
196 | #ifndef HAVE_DLFCN_H |
197 | static const char * | |
198 | dlerror (void) | |
199 | { | |
200 | return ""; | |
201 | } | |
202 | #endif | |
203 | ||
5d3236ee DK |
204 | /* Helper function for exiting with error status. */ |
205 | static int | |
206 | set_plugin_error (const char *plugin) | |
207 | { | |
208 | error_plugin = plugin; | |
209 | return -1; | |
210 | } | |
211 | ||
212 | /* Test if an error occurred. */ | |
213 | static bfd_boolean | |
214 | plugin_error_p (void) | |
215 | { | |
216 | return error_plugin != NULL; | |
217 | } | |
218 | ||
219 | /* Return name of plugin which caused an error if any. */ | |
d44ad554 DK |
220 | const char * |
221 | plugin_error_plugin (void) | |
5d3236ee DK |
222 | { |
223 | return error_plugin ? error_plugin : _("<no plugin>"); | |
224 | } | |
225 | ||
226 | /* Handle -plugin arg: find and load plugin, or return error. */ | |
d82184d7 | 227 | void |
d44ad554 | 228 | plugin_opt_plugin (const char *plugin) |
5d3236ee DK |
229 | { |
230 | plugin_t *newplug; | |
231 | ||
232 | newplug = xmalloc (sizeof *newplug); | |
233 | memset (newplug, 0, sizeof *newplug); | |
234 | newplug->name = plugin; | |
235 | newplug->dlhandle = dlopen (plugin, RTLD_NOW); | |
236 | if (!newplug->dlhandle) | |
d82184d7 | 237 | einfo (_("%P%F: %s: error loading plugin: %s\n"), plugin, dlerror ()); |
5d3236ee DK |
238 | |
239 | /* Chain on end, so when we run list it is in command-line order. */ | |
240 | *plugins_tail_chain_ptr = newplug; | |
241 | plugins_tail_chain_ptr = &newplug->next; | |
242 | ||
243 | /* Record it as current plugin for receiving args. */ | |
244 | last_plugin = newplug; | |
245 | last_plugin_args_tail_chain_ptr = &newplug->args; | |
5d3236ee DK |
246 | } |
247 | ||
248 | /* Accumulate option arguments for last-loaded plugin, or return | |
249 | error if none. */ | |
d44ad554 DK |
250 | int |
251 | plugin_opt_plugin_arg (const char *arg) | |
5d3236ee DK |
252 | { |
253 | plugin_arg_t *newarg; | |
254 | ||
255 | if (!last_plugin) | |
256 | return set_plugin_error (_("<no plugin>")); | |
257 | ||
97964ab3 AM |
258 | /* Ignore -pass-through= from GCC driver. */ |
259 | if (*arg == '-') | |
260 | { | |
261 | const char *p = arg + 1; | |
262 | ||
263 | if (*p == '-') | |
264 | ++p; | |
265 | if (strncmp (p, "pass-through=", 13) == 0) | |
266 | return 0; | |
267 | } | |
268 | ||
5d3236ee DK |
269 | newarg = xmalloc (sizeof *newarg); |
270 | newarg->arg = arg; | |
271 | newarg->next = NULL; | |
272 | ||
273 | /* Chain on end to preserve command-line order. */ | |
274 | *last_plugin_args_tail_chain_ptr = newarg; | |
275 | last_plugin_args_tail_chain_ptr = &newarg->next; | |
276 | last_plugin->n_args++; | |
277 | return 0; | |
278 | } | |
279 | ||
37a3056a L |
280 | /* Generate a dummy BFD to represent an IR file, for any callers of |
281 | plugin_call_claim_file to use as the handle in the ld_plugin_input_file | |
282 | struct that they build to pass in. The BFD is initially writable, so | |
283 | that symbols can be added to it; it must be made readable after the | |
284 | add_symbols hook has been called so that it can be read when linking. */ | |
285 | static bfd * | |
5d3236ee DK |
286 | plugin_get_ir_dummy_bfd (const char *name, bfd *srctemplate) |
287 | { | |
bc110b6e AM |
288 | bfd *abfd; |
289 | ||
290 | bfd_use_reserved_id = 1; | |
9e2278f5 | 291 | abfd = bfd_create (concat (name, IRONLY_SUFFIX, (const char *) NULL), |
bc110b6e | 292 | srctemplate); |
9e2278f5 AM |
293 | if (abfd != NULL) |
294 | { | |
295 | abfd->flags |= BFD_LINKER_CREATED | BFD_PLUGIN; | |
296 | bfd_set_arch_info (abfd, bfd_get_arch_info (srctemplate)); | |
297 | bfd_set_gp_size (abfd, bfd_get_gp_size (srctemplate)); | |
298 | if (bfd_make_writable (abfd) | |
299 | && bfd_copy_private_bfd_data (srctemplate, abfd)) | |
300 | { | |
301 | flagword flags; | |
302 | ||
c77ec726 | 303 | /* Create section to own the symbols. */ |
9e2278f5 AM |
304 | flags = (SEC_CODE | SEC_HAS_CONTENTS | SEC_READONLY |
305 | | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_EXCLUDE); | |
306 | if (bfd_make_section_anyway_with_flags (abfd, ".text", flags)) | |
307 | return abfd; | |
308 | } | |
309 | } | |
310 | einfo (_("could not create dummy IR bfd: %F%E\n")); | |
311 | return NULL; | |
5d3236ee DK |
312 | } |
313 | ||
d44ad554 | 314 | /* Check if the BFD passed in is an IR dummy object file. */ |
23ebe1a0 | 315 | static inline bfd_boolean |
5d3236ee DK |
316 | is_ir_dummy_bfd (const bfd *abfd) |
317 | { | |
cf4dc96f | 318 | /* ABFD can sometimes legitimately be NULL, e.g. when called from one |
23ebe1a0 AM |
319 | of the linker callbacks for a symbol in the *ABS* or *UND* sections. */ |
320 | return abfd != NULL && (abfd->flags & BFD_PLUGIN) != 0; | |
5d3236ee DK |
321 | } |
322 | ||
323 | /* Helpers to convert between BFD and GOLD symbol formats. */ | |
324 | static enum ld_plugin_status | |
325 | asymbol_from_plugin_symbol (bfd *abfd, asymbol *asym, | |
f84854b6 | 326 | const struct ld_plugin_symbol *ldsym) |
5d3236ee DK |
327 | { |
328 | flagword flags = BSF_NO_FLAGS; | |
329 | struct bfd_section *section; | |
330 | ||
331 | asym->the_bfd = abfd; | |
f84854b6 | 332 | asym->name = (ldsym->version |
9e2278f5 | 333 | ? concat (ldsym->name, "@", ldsym->version, (const char *) NULL) |
f84854b6 | 334 | : ldsym->name); |
5d3236ee DK |
335 | asym->value = 0; |
336 | switch (ldsym->def) | |
337 | { | |
338 | case LDPK_WEAKDEF: | |
339 | flags = BSF_WEAK; | |
340 | /* FALLTHRU */ | |
341 | case LDPK_DEF: | |
342 | flags |= BSF_GLOBAL; | |
c77ec726 AM |
343 | if (ldsym->comdat_key) |
344 | { | |
345 | char *name = concat (".gnu.linkonce.t.", ldsym->comdat_key, | |
346 | (const char *) NULL); | |
347 | section = bfd_get_section_by_name (abfd, name); | |
348 | if (section != NULL) | |
349 | free (name); | |
350 | else | |
351 | { | |
352 | flagword sflags; | |
353 | ||
354 | sflags = (SEC_CODE | SEC_HAS_CONTENTS | SEC_READONLY | |
355 | | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_EXCLUDE | |
356 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD); | |
357 | section = bfd_make_section_anyway_with_flags (abfd, name, sflags); | |
358 | if (section == NULL) | |
359 | return LDPS_ERR; | |
360 | } | |
361 | } | |
362 | else | |
363 | section = bfd_get_section_by_name (abfd, ".text"); | |
5d3236ee DK |
364 | break; |
365 | ||
366 | case LDPK_WEAKUNDEF: | |
367 | flags = BSF_WEAK; | |
368 | /* FALLTHRU */ | |
369 | case LDPK_UNDEF: | |
370 | section = bfd_und_section_ptr; | |
371 | break; | |
372 | ||
373 | case LDPK_COMMON: | |
374 | flags = BSF_GLOBAL; | |
375 | section = bfd_com_section_ptr; | |
376 | asym->value = ldsym->size; | |
5c08b7d4 L |
377 | /* For ELF targets, set alignment of common symbol to 1. */ |
378 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) | |
02d00247 AM |
379 | { |
380 | ((elf_symbol_type *) asym)->internal_elf_sym.st_shndx = SHN_COMMON; | |
381 | ((elf_symbol_type *) asym)->internal_elf_sym.st_value = 1; | |
382 | } | |
5d3236ee DK |
383 | break; |
384 | ||
385 | default: | |
386 | return LDPS_ERR; | |
387 | } | |
388 | asym->flags = flags; | |
389 | asym->section = section; | |
390 | ||
391 | /* Visibility only applies on ELF targets. */ | |
392 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) | |
393 | { | |
394 | elf_symbol_type *elfsym = elf_symbol_from (abfd, asym); | |
cfac8028 L |
395 | unsigned char visibility; |
396 | ||
5d3236ee | 397 | if (!elfsym) |
ea360572 | 398 | einfo (_("%P%F: %s: non-ELF symbol in ELF BFD!\n"), asym->name); |
cfac8028 L |
399 | switch (ldsym->visibility) |
400 | { | |
401 | default: | |
ea360572 | 402 | einfo (_("%P%F: unknown ELF symbol visibility: %d!\n"), |
cfac8028 L |
403 | ldsym->visibility); |
404 | case LDPV_DEFAULT: | |
405 | visibility = STV_DEFAULT; | |
406 | break; | |
407 | case LDPV_PROTECTED: | |
408 | visibility = STV_PROTECTED; | |
409 | break; | |
410 | case LDPV_INTERNAL: | |
411 | visibility = STV_INTERNAL; | |
412 | break; | |
413 | case LDPV_HIDDEN: | |
414 | visibility = STV_HIDDEN; | |
415 | break; | |
416 | } | |
417 | elfsym->internal_elf_sym.st_other | |
418 | = (visibility | (elfsym->internal_elf_sym.st_other | |
419 | & ~ELF_ST_VISIBILITY (-1))); | |
5d3236ee DK |
420 | } |
421 | ||
422 | return LDPS_OK; | |
423 | } | |
424 | ||
425 | /* Register a claim-file handler. */ | |
426 | static enum ld_plugin_status | |
427 | register_claim_file (ld_plugin_claim_file_handler handler) | |
428 | { | |
429 | ASSERT (called_plugin); | |
430 | called_plugin->claim_file_handler = handler; | |
431 | return LDPS_OK; | |
432 | } | |
433 | ||
434 | /* Register an all-symbols-read handler. */ | |
435 | static enum ld_plugin_status | |
436 | register_all_symbols_read (ld_plugin_all_symbols_read_handler handler) | |
437 | { | |
438 | ASSERT (called_plugin); | |
439 | called_plugin->all_symbols_read_handler = handler; | |
440 | return LDPS_OK; | |
441 | } | |
442 | ||
443 | /* Register a cleanup handler. */ | |
444 | static enum ld_plugin_status | |
445 | register_cleanup (ld_plugin_cleanup_handler handler) | |
446 | { | |
447 | ASSERT (called_plugin); | |
448 | called_plugin->cleanup_handler = handler; | |
449 | return LDPS_OK; | |
450 | } | |
451 | ||
452 | /* Add symbols from a plugin-claimed input file. */ | |
453 | static enum ld_plugin_status | |
454 | add_symbols (void *handle, int nsyms, const struct ld_plugin_symbol *syms) | |
455 | { | |
456 | asymbol **symptrs; | |
f4b78d18 L |
457 | plugin_input_file_t *input = handle; |
458 | bfd *abfd = input->abfd; | |
7fe550fc | 459 | int n; |
43e1669b | 460 | |
5d3236ee DK |
461 | ASSERT (called_plugin); |
462 | symptrs = xmalloc (nsyms * sizeof *symptrs); | |
7fe550fc | 463 | for (n = 0; n < nsyms; n++) |
5d3236ee DK |
464 | { |
465 | enum ld_plugin_status rv; | |
0c511000 AM |
466 | asymbol *bfdsym; |
467 | ||
0c511000 | 468 | bfdsym = bfd_make_empty_symbol (abfd); |
7fe550fc | 469 | symptrs[n] = bfdsym; |
5d3236ee DK |
470 | rv = asymbol_from_plugin_symbol (abfd, bfdsym, syms + n); |
471 | if (rv != LDPS_OK) | |
472 | return rv; | |
473 | } | |
7fe550fc | 474 | bfd_set_symtab (abfd, symptrs, nsyms); |
5d3236ee DK |
475 | return LDPS_OK; |
476 | } | |
477 | ||
478 | /* Get the input file information with an open (possibly re-opened) | |
479 | file descriptor. */ | |
480 | static enum ld_plugin_status | |
f4b78d18 | 481 | get_input_file (const void *handle, struct ld_plugin_input_file *file) |
5d3236ee | 482 | { |
f4b78d18 L |
483 | const plugin_input_file_t *input = handle; |
484 | ||
5d3236ee | 485 | ASSERT (called_plugin); |
f4b78d18 L |
486 | |
487 | file->name = input->name; | |
488 | file->offset = input->offset; | |
489 | file->filesize = input->filesize; | |
490 | file->handle = (void *) handle; | |
491 | ||
492 | return LDPS_OK; | |
5d3236ee DK |
493 | } |
494 | ||
15f7a26b L |
495 | /* Get view of the input file. */ |
496 | static enum ld_plugin_status | |
f4b78d18 | 497 | get_view (const void *handle, const void **viewp) |
15f7a26b | 498 | { |
2aec968d | 499 | plugin_input_file_t *input = (plugin_input_file_t *) handle; |
f4b78d18 | 500 | char *buffer; |
2aec968d | 501 | size_t size = input->filesize; |
f4b78d18 | 502 | |
15f7a26b | 503 | ASSERT (called_plugin); |
f4b78d18 | 504 | |
2aec968d L |
505 | /* FIXME: einfo should support %lld. */ |
506 | if ((off_t) size != input->filesize) | |
507 | einfo (_("%P%F: unsupported input file size: %s (%ld bytes)\n"), | |
508 | input->name, (long) input->filesize); | |
f4b78d18 | 509 | |
2aec968d L |
510 | /* Check the cached view buffer. */ |
511 | if (input->view_buffer.addr != NULL | |
512 | && input->view_buffer.filesize == size | |
513 | && input->view_buffer.offset == input->offset) | |
514 | { | |
515 | *viewp = input->view_buffer.addr; | |
516 | return LDPS_OK; | |
517 | } | |
518 | ||
519 | input->view_buffer.filesize = size; | |
520 | input->view_buffer.offset = input->offset; | |
f4b78d18 | 521 | |
2aec968d L |
522 | #if HAVE_MMAP |
523 | buffer = mmap (NULL, size, PROT_READ, MAP_PRIVATE, input->fd, | |
524 | input->offset); | |
525 | if (buffer == MAP_FAILED) | |
526 | #endif | |
f4b78d18 | 527 | { |
2aec968d L |
528 | char *p; |
529 | ||
530 | if (lseek (input->fd, input->offset, SEEK_SET) < 0) | |
531 | return LDPS_ERR; | |
532 | ||
533 | buffer = bfd_alloc (input->abfd, size); | |
534 | if (buffer == NULL) | |
535 | return LDPS_ERR; | |
536 | ||
537 | p = buffer; | |
538 | do | |
f4b78d18 | 539 | { |
2aec968d L |
540 | ssize_t got = read (input->fd, p, size); |
541 | if (got == 0) | |
542 | break; | |
543 | else if (got > 0) | |
544 | { | |
545 | p += got; | |
546 | size -= got; | |
547 | } | |
548 | else if (errno != EINTR) | |
549 | return LDPS_ERR; | |
f4b78d18 | 550 | } |
2aec968d | 551 | while (size > 0); |
f4b78d18 | 552 | } |
2aec968d L |
553 | |
554 | input->view_buffer.addr = buffer; | |
555 | *viewp = buffer; | |
f4b78d18 L |
556 | |
557 | return LDPS_OK; | |
15f7a26b L |
558 | } |
559 | ||
5d3236ee DK |
560 | /* Release the input file. */ |
561 | static enum ld_plugin_status | |
f4b78d18 | 562 | release_input_file (const void *handle) |
5d3236ee | 563 | { |
119d62ff | 564 | plugin_input_file_t *input = (plugin_input_file_t *) handle; |
5d3236ee | 565 | ASSERT (called_plugin); |
f4b78d18 | 566 | if (input->fd != -1) |
119d62ff L |
567 | { |
568 | close (input->fd); | |
569 | input->fd = -1; | |
570 | } | |
f4b78d18 | 571 | return LDPS_OK; |
5d3236ee DK |
572 | } |
573 | ||
42a851a9 DK |
574 | /* Return TRUE if a defined symbol might be reachable from outside the |
575 | universe of claimed objects. */ | |
576 | static inline bfd_boolean | |
9bbc1a67 | 577 | is_visible_from_outside (struct ld_plugin_symbol *lsym, |
f84854b6 | 578 | struct bfd_link_hash_entry *blhe) |
42a851a9 | 579 | { |
35ed3f94 AM |
580 | struct bfd_sym_chain *sym; |
581 | ||
42a851a9 DK |
582 | if (link_info.relocatable) |
583 | return TRUE; | |
9bbc1a67 | 584 | if (link_info.export_dynamic || !link_info.executable) |
42a851a9 | 585 | { |
fd91d419 L |
586 | /* Check if symbol is hidden by version script. */ |
587 | if (bfd_hide_sym_by_version (link_info.version_info, | |
588 | blhe->root.string)) | |
589 | return FALSE; | |
42a851a9 DK |
590 | /* Only ELF symbols really have visibility. */ |
591 | if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour) | |
592 | { | |
593 | struct elf_link_hash_entry *el = (struct elf_link_hash_entry *)blhe; | |
594 | int vis = ELF_ST_VISIBILITY (el->other); | |
595 | return vis == STV_DEFAULT || vis == STV_PROTECTED; | |
596 | } | |
597 | /* On non-ELF targets, we can safely make inferences by considering | |
f84854b6 | 598 | what visibility the plugin would have liked to apply when it first |
42a851a9 DK |
599 | sent us the symbol. During ELF symbol processing, visibility only |
600 | ever becomes more restrictive, not less, when symbols are merged, | |
601 | so this is a conservative estimate; it may give false positives, | |
602 | declaring something visible from outside when it in fact would | |
603 | not have been, but this will only lead to missed optimisation | |
604 | opportunities during LTRANS at worst; it will not give false | |
605 | negatives, which can lead to the disastrous conclusion that the | |
606 | related symbol is IRONLY. (See GCC PR46319 for an example.) */ | |
cfac8028 L |
607 | return (lsym->visibility == LDPV_DEFAULT |
608 | || lsym->visibility == LDPV_PROTECTED); | |
42a851a9 | 609 | } |
35ed3f94 AM |
610 | |
611 | for (sym = &entry_symbol; sym != NULL; sym = sym->next) | |
612 | if (sym->name | |
613 | && strcmp (sym->name, blhe->root.string) == 0) | |
614 | return TRUE; | |
615 | ||
42a851a9 DK |
616 | return FALSE; |
617 | } | |
618 | ||
5d3236ee DK |
619 | /* Get the symbol resolution info for a plugin-claimed input file. */ |
620 | static enum ld_plugin_status | |
69ee6ab2 AM |
621 | get_symbols (const void *handle, int nsyms, struct ld_plugin_symbol *syms, |
622 | int def_ironly_exp) | |
5d3236ee | 623 | { |
f4b78d18 L |
624 | const plugin_input_file_t *input = handle; |
625 | const bfd *abfd = (const bfd *) input->abfd; | |
5d3236ee | 626 | int n; |
69ee6ab2 | 627 | |
5d3236ee DK |
628 | ASSERT (called_plugin); |
629 | for (n = 0; n < nsyms; n++) | |
630 | { | |
631 | struct bfd_link_hash_entry *blhe; | |
42a851a9 | 632 | asection *owner_sec; |
69ee6ab2 AM |
633 | int res; |
634 | ||
10be1b6a DK |
635 | if (syms[n].def != LDPK_UNDEF) |
636 | blhe = bfd_link_hash_lookup (link_info.hash, syms[n].name, | |
637 | FALSE, FALSE, TRUE); | |
638 | else | |
639 | blhe = bfd_wrapped_link_hash_lookup (link_info.output_bfd, &link_info, | |
640 | syms[n].name, FALSE, FALSE, TRUE); | |
5d3236ee DK |
641 | if (!blhe) |
642 | { | |
69ee6ab2 | 643 | res = LDPR_UNKNOWN; |
1715a13c | 644 | goto report_symbol; |
5d3236ee DK |
645 | } |
646 | ||
647 | /* Determine resolution from blhe type and symbol's original type. */ | |
648 | if (blhe->type == bfd_link_hash_undefined | |
f84854b6 | 649 | || blhe->type == bfd_link_hash_undefweak) |
5d3236ee | 650 | { |
69ee6ab2 | 651 | res = LDPR_UNDEF; |
1715a13c | 652 | goto report_symbol; |
5d3236ee DK |
653 | } |
654 | if (blhe->type != bfd_link_hash_defined | |
f84854b6 L |
655 | && blhe->type != bfd_link_hash_defweak |
656 | && blhe->type != bfd_link_hash_common) | |
5d3236ee DK |
657 | { |
658 | /* We should not have a new, indirect or warning symbol here. */ | |
ea360572 | 659 | einfo ("%P%F: %s: plugin symbol table corrupt (sym type %d)\n", |
f84854b6 | 660 | called_plugin->name, blhe->type); |
5d3236ee DK |
661 | } |
662 | ||
42a851a9 DK |
663 | /* Find out which section owns the symbol. Since it's not undef, |
664 | it must have an owner; if it's not a common symbol, both defs | |
665 | and weakdefs keep it in the same place. */ | |
9e2278f5 AM |
666 | owner_sec = (blhe->type == bfd_link_hash_common |
667 | ? blhe->u.c.p->section | |
668 | : blhe->u.def.section); | |
42a851a9 | 669 | |
5d3236ee DK |
670 | |
671 | /* If it was originally undefined or common, then it has been | |
f84854b6 L |
672 | resolved; determine how. */ |
673 | if (syms[n].def == LDPK_UNDEF | |
674 | || syms[n].def == LDPK_WEAKUNDEF | |
5d3236ee DK |
675 | || syms[n].def == LDPK_COMMON) |
676 | { | |
5d3236ee | 677 | if (owner_sec->owner == link_info.output_bfd) |
69ee6ab2 | 678 | res = LDPR_RESOLVED_EXEC; |
5d3236ee | 679 | else if (owner_sec->owner == abfd) |
69ee6ab2 | 680 | res = LDPR_PREVAILING_DEF_IRONLY; |
5d3236ee | 681 | else if (is_ir_dummy_bfd (owner_sec->owner)) |
69ee6ab2 | 682 | res = LDPR_RESOLVED_IR; |
cc322803 L |
683 | else if (owner_sec->owner != NULL |
684 | && (owner_sec->owner->flags & DYNAMIC) != 0) | |
69ee6ab2 | 685 | res = LDPR_RESOLVED_DYN; |
5d3236ee | 686 | else |
69ee6ab2 | 687 | res = LDPR_RESOLVED_EXEC; |
5d3236ee DK |
688 | } |
689 | ||
690 | /* Was originally def, or weakdef. Does it prevail? If the | |
f84854b6 | 691 | owner is the original dummy bfd that supplied it, then this |
5d3236ee | 692 | is the definition that has prevailed. */ |
69ee6ab2 AM |
693 | else if (owner_sec->owner == link_info.output_bfd) |
694 | res = LDPR_PREEMPTED_REG; | |
42a851a9 | 695 | else if (owner_sec->owner == abfd) |
69ee6ab2 | 696 | res = LDPR_PREVAILING_DEF_IRONLY; |
5d3236ee DK |
697 | |
698 | /* Was originally def, weakdef, or common, but has been pre-empted. */ | |
69ee6ab2 AM |
699 | else if (is_ir_dummy_bfd (owner_sec->owner)) |
700 | res = LDPR_PREEMPTED_IR; | |
701 | else | |
702 | res = LDPR_PREEMPTED_REG; | |
703 | ||
704 | if (res == LDPR_PREVAILING_DEF_IRONLY) | |
705 | { | |
706 | /* We need to know if the sym is referenced from non-IR files. Or | |
707 | even potentially-referenced, perhaps in a future final link if | |
708 | this is a partial one, perhaps dynamically at load-time if the | |
709 | symbol is externally visible. */ | |
710 | if (blhe->non_ir_ref) | |
711 | res = LDPR_PREVAILING_DEF; | |
9bbc1a67 | 712 | else if (is_visible_from_outside (&syms[n], blhe)) |
69ee6ab2 AM |
713 | res = def_ironly_exp; |
714 | } | |
1715a13c | 715 | |
9e2278f5 | 716 | report_symbol: |
69ee6ab2 | 717 | syms[n].resolution = res; |
1715a13c | 718 | if (report_plugin_symbols) |
9e2278f5 AM |
719 | einfo (_("%P: %B: symbol `%s' " |
720 | "definition: %d, visibility: %d, resolution: %d\n"), | |
721 | abfd, syms[n].name, | |
69ee6ab2 | 722 | syms[n].def, syms[n].visibility, res); |
5d3236ee DK |
723 | } |
724 | return LDPS_OK; | |
725 | } | |
726 | ||
69ee6ab2 AM |
727 | static enum ld_plugin_status |
728 | get_symbols_v1 (const void *handle, int nsyms, struct ld_plugin_symbol *syms) | |
729 | { | |
730 | return get_symbols (handle, nsyms, syms, LDPR_PREVAILING_DEF); | |
731 | } | |
732 | ||
733 | static enum ld_plugin_status | |
734 | get_symbols_v2 (const void *handle, int nsyms, struct ld_plugin_symbol *syms) | |
735 | { | |
736 | return get_symbols (handle, nsyms, syms, LDPR_PREVAILING_DEF_IRONLY_EXP); | |
737 | } | |
738 | ||
5d3236ee DK |
739 | /* Add a new (real) input file generated by a plugin. */ |
740 | static enum ld_plugin_status | |
741 | add_input_file (const char *pathname) | |
742 | { | |
743 | ASSERT (called_plugin); | |
d4cb7acd | 744 | if (!lang_add_input_file (xstrdup (pathname), lang_input_file_is_file_enum, |
f84854b6 | 745 | NULL)) |
5d3236ee DK |
746 | return LDPS_ERR; |
747 | return LDPS_OK; | |
748 | } | |
749 | ||
750 | /* Add a new (real) library required by a plugin. */ | |
751 | static enum ld_plugin_status | |
752 | add_input_library (const char *pathname) | |
753 | { | |
754 | ASSERT (called_plugin); | |
d4cb7acd | 755 | if (!lang_add_input_file (xstrdup (pathname), lang_input_file_is_l_enum, |
f84854b6 | 756 | NULL)) |
5d3236ee DK |
757 | return LDPS_ERR; |
758 | return LDPS_OK; | |
759 | } | |
760 | ||
761 | /* Set the extra library path to be used by libraries added via | |
762 | add_input_library. */ | |
763 | static enum ld_plugin_status | |
764 | set_extra_library_path (const char *path) | |
765 | { | |
766 | ASSERT (called_plugin); | |
d4cb7acd | 767 | ldfile_add_library_path (xstrdup (path), FALSE); |
5d3236ee DK |
768 | return LDPS_OK; |
769 | } | |
770 | ||
771 | /* Issue a diagnostic message from a plugin. */ | |
772 | static enum ld_plugin_status | |
773 | message (int level, const char *format, ...) | |
774 | { | |
775 | va_list args; | |
776 | va_start (args, format); | |
777 | ||
778 | switch (level) | |
779 | { | |
780 | case LDPL_INFO: | |
781 | vfinfo (stdout, format, args, FALSE); | |
d251c5c4 | 782 | putchar ('\n'); |
5d3236ee DK |
783 | break; |
784 | case LDPL_WARNING: | |
785 | vfinfo (stdout, format, args, TRUE); | |
d251c5c4 | 786 | putchar ('\n'); |
5d3236ee DK |
787 | break; |
788 | case LDPL_FATAL: | |
789 | case LDPL_ERROR: | |
790 | default: | |
9e2278f5 AM |
791 | { |
792 | char *newfmt = ACONCAT ((level == LDPL_FATAL ? "%P%F: " : "%P%X: ", | |
793 | format, "\n", (const char *) NULL)); | |
794 | fflush (stdout); | |
795 | vfinfo (stderr, newfmt, args, TRUE); | |
796 | fflush (stderr); | |
797 | } | |
5d3236ee DK |
798 | break; |
799 | } | |
800 | ||
801 | va_end (args); | |
802 | return LDPS_OK; | |
803 | } | |
804 | ||
805 | /* Helper to size leading part of tv array and set it up. */ | |
69ee6ab2 | 806 | static void |
5d3236ee DK |
807 | set_tv_header (struct ld_plugin_tv *tv) |
808 | { | |
809 | size_t i; | |
810 | ||
811 | /* Version info. */ | |
812 | static const unsigned int major = (unsigned)(BFD_VERSION / 100000000UL); | |
813 | static const unsigned int minor = (unsigned)(BFD_VERSION / 1000000UL) % 100; | |
814 | ||
5d3236ee DK |
815 | for (i = 0; i < tv_header_size; i++) |
816 | { | |
817 | tv[i].tv_tag = tv_header_tags[i]; | |
818 | #define TVU(x) tv[i].tv_u.tv_ ## x | |
819 | switch (tv[i].tv_tag) | |
820 | { | |
f84854b6 L |
821 | case LDPT_MESSAGE: |
822 | TVU(message) = message; | |
823 | break; | |
824 | case LDPT_API_VERSION: | |
825 | TVU(val) = LD_PLUGIN_API_VERSION; | |
826 | break; | |
827 | case LDPT_GNU_LD_VERSION: | |
828 | TVU(val) = major * 100 + minor; | |
829 | break; | |
830 | case LDPT_LINKER_OUTPUT: | |
831 | TVU(val) = (link_info.relocatable | |
832 | ? LDPO_REL | |
6611f2e1 L |
833 | : (link_info.executable |
834 | ? (link_info.pie ? LDPO_PIE : LDPO_EXEC) | |
835 | : LDPO_DYN)); | |
f84854b6 L |
836 | break; |
837 | case LDPT_OUTPUT_NAME: | |
838 | TVU(string) = output_filename; | |
839 | break; | |
840 | case LDPT_REGISTER_CLAIM_FILE_HOOK: | |
841 | TVU(register_claim_file) = register_claim_file; | |
842 | break; | |
843 | case LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK: | |
844 | TVU(register_all_symbols_read) = register_all_symbols_read; | |
845 | break; | |
846 | case LDPT_REGISTER_CLEANUP_HOOK: | |
847 | TVU(register_cleanup) = register_cleanup; | |
848 | break; | |
849 | case LDPT_ADD_SYMBOLS: | |
850 | TVU(add_symbols) = add_symbols; | |
851 | break; | |
852 | case LDPT_GET_INPUT_FILE: | |
853 | TVU(get_input_file) = get_input_file; | |
854 | break; | |
15f7a26b L |
855 | case LDPT_GET_VIEW: |
856 | TVU(get_view) = get_view; | |
857 | break; | |
f84854b6 L |
858 | case LDPT_RELEASE_INPUT_FILE: |
859 | TVU(release_input_file) = release_input_file; | |
860 | break; | |
861 | case LDPT_GET_SYMBOLS: | |
69ee6ab2 AM |
862 | TVU(get_symbols) = get_symbols_v1; |
863 | break; | |
864 | case LDPT_GET_SYMBOLS_V2: | |
865 | TVU(get_symbols) = get_symbols_v2; | |
f84854b6 L |
866 | break; |
867 | case LDPT_ADD_INPUT_FILE: | |
868 | TVU(add_input_file) = add_input_file; | |
869 | break; | |
870 | case LDPT_ADD_INPUT_LIBRARY: | |
871 | TVU(add_input_library) = add_input_library; | |
872 | break; | |
873 | case LDPT_SET_EXTRA_LIBRARY_PATH: | |
874 | TVU(set_extra_library_path) = set_extra_library_path; | |
875 | break; | |
876 | default: | |
877 | /* Added a new entry to the array without adding | |
878 | a new case to set up its value is a bug. */ | |
879 | FAIL (); | |
5d3236ee DK |
880 | } |
881 | #undef TVU | |
882 | } | |
5d3236ee DK |
883 | } |
884 | ||
885 | /* Append the per-plugin args list and trailing LDPT_NULL to tv. */ | |
886 | static void | |
887 | set_tv_plugin_args (plugin_t *plugin, struct ld_plugin_tv *tv) | |
888 | { | |
889 | plugin_arg_t *arg = plugin->args; | |
890 | while (arg) | |
891 | { | |
892 | tv->tv_tag = LDPT_OPTION; | |
893 | tv->tv_u.tv_string = arg->arg; | |
894 | arg = arg->next; | |
895 | tv++; | |
896 | } | |
897 | tv->tv_tag = LDPT_NULL; | |
898 | tv->tv_u.tv_val = 0; | |
899 | } | |
900 | ||
901 | /* Load up and initialise all plugins after argument parsing. */ | |
d82184d7 | 902 | void |
d44ad554 | 903 | plugin_load_plugins (void) |
5d3236ee DK |
904 | { |
905 | struct ld_plugin_tv *my_tv; | |
906 | unsigned int max_args = 0; | |
907 | plugin_t *curplug = plugins_list; | |
908 | ||
909 | /* If there are no plugins, we need do nothing this run. */ | |
910 | if (!curplug) | |
d82184d7 | 911 | return; |
5d3236ee DK |
912 | |
913 | /* First pass over plugins to find max # args needed so that we | |
914 | can size and allocate the tv array. */ | |
915 | while (curplug) | |
916 | { | |
917 | if (curplug->n_args > max_args) | |
918 | max_args = curplug->n_args; | |
919 | curplug = curplug->next; | |
920 | } | |
921 | ||
922 | /* Allocate tv array and initialise constant part. */ | |
923 | my_tv = xmalloc ((max_args + 1 + tv_header_size) * sizeof *my_tv); | |
924 | set_tv_header (my_tv); | |
925 | ||
926 | /* Pass over plugins again, activating them. */ | |
927 | curplug = plugins_list; | |
928 | while (curplug) | |
929 | { | |
930 | enum ld_plugin_status rv; | |
a8f9d13e AM |
931 | ld_plugin_onload onloadfn; |
932 | ||
933 | onloadfn = (ld_plugin_onload) dlsym (curplug->dlhandle, "onload"); | |
5d3236ee | 934 | if (!onloadfn) |
a8f9d13e | 935 | onloadfn = (ld_plugin_onload) dlsym (curplug->dlhandle, "_onload"); |
5d3236ee | 936 | if (!onloadfn) |
d82184d7 L |
937 | einfo (_("%P%F: %s: error loading plugin: %s\n"), |
938 | curplug->name, dlerror ()); | |
5d3236ee DK |
939 | set_tv_plugin_args (curplug, &my_tv[tv_header_size]); |
940 | called_plugin = curplug; | |
941 | rv = (*onloadfn) (my_tv); | |
942 | called_plugin = NULL; | |
943 | if (rv != LDPS_OK) | |
d82184d7 | 944 | einfo (_("%P%F: %s: plugin error: %d\n"), curplug->name, rv); |
5d3236ee DK |
945 | curplug = curplug->next; |
946 | } | |
947 | ||
948 | /* Since plugin(s) inited ok, assume they're going to want symbol | |
949 | resolutions, which needs us to track which symbols are referenced | |
950 | by non-IR files using the linker's notice callback. */ | |
9e2278f5 AM |
951 | orig_notice_all = link_info.notice_all; |
952 | orig_callbacks = link_info.callbacks; | |
953 | plugin_callbacks = *orig_callbacks; | |
954 | plugin_callbacks.notice = &plugin_notice; | |
5d3236ee | 955 | link_info.notice_all = TRUE; |
61f41c3c | 956 | link_info.lto_plugin_active = TRUE; |
9e2278f5 | 957 | link_info.callbacks = &plugin_callbacks; |
5d3236ee DK |
958 | } |
959 | ||
960 | /* Call 'claim file' hook for all plugins. */ | |
02d00247 | 961 | static int |
5d3236ee DK |
962 | plugin_call_claim_file (const struct ld_plugin_input_file *file, int *claimed) |
963 | { | |
964 | plugin_t *curplug = plugins_list; | |
965 | *claimed = FALSE; | |
966 | if (no_more_claiming) | |
967 | return 0; | |
968 | while (curplug && !*claimed) | |
969 | { | |
970 | if (curplug->claim_file_handler) | |
971 | { | |
972 | enum ld_plugin_status rv; | |
973 | called_plugin = curplug; | |
974 | rv = (*curplug->claim_file_handler) (file, claimed); | |
975 | called_plugin = NULL; | |
976 | if (rv != LDPS_OK) | |
977 | set_plugin_error (curplug->name); | |
978 | } | |
979 | curplug = curplug->next; | |
980 | } | |
981 | return plugin_error_p () ? -1 : 0; | |
982 | } | |
983 | ||
35a1e5f3 L |
984 | /* Duplicates a character string with memory attached to ABFD. */ |
985 | ||
986 | static char * | |
987 | plugin_strdup (bfd *abfd, const char *str) | |
988 | { | |
989 | size_t strlength; | |
990 | char *copy; | |
991 | strlength = strlen (str) + 1; | |
992 | copy = bfd_alloc (abfd, strlength); | |
993 | if (copy == NULL) | |
994 | einfo (_("%P%F: plugin_strdup failed to allocate memory: %s\n"), | |
995 | bfd_get_error ()); | |
996 | memcpy (copy, str, strlength); | |
997 | return copy; | |
998 | } | |
999 | ||
02d00247 | 1000 | void |
35a1e5f3 | 1001 | plugin_maybe_claim (lang_input_statement_type *entry) |
02d00247 AM |
1002 | { |
1003 | int claimed = 0; | |
f4b78d18 | 1004 | plugin_input_file_t *input; |
35a1e5f3 L |
1005 | off_t offset, filesize; |
1006 | struct ld_plugin_input_file file; | |
1007 | bfd *abfd; | |
1008 | bfd *ibfd = entry->the_bfd; | |
1009 | bfd_boolean inarchive = bfd_my_archive (ibfd) != NULL; | |
1010 | const char *name | |
1011 | = inarchive ? bfd_my_archive (ibfd)->filename : ibfd->filename; | |
1012 | int fd = open (name, O_RDONLY | O_BINARY); | |
1013 | ||
1014 | if (fd < 0) | |
1015 | return; | |
02d00247 AM |
1016 | |
1017 | /* We create a dummy BFD, initially empty, to house whatever symbols | |
1018 | the plugin may want to add. */ | |
35a1e5f3 | 1019 | abfd = plugin_get_ir_dummy_bfd (ibfd->filename, ibfd); |
f4b78d18 L |
1020 | |
1021 | input = bfd_alloc (abfd, sizeof (*input)); | |
1022 | if (input == NULL) | |
1023 | einfo (_("%P%F: plugin failed to allocate memory for input: %s\n"), | |
1024 | bfd_get_error ()); | |
1025 | ||
35a1e5f3 L |
1026 | if (inarchive) |
1027 | { | |
1028 | /* Offset and filesize must refer to the individual archive | |
1029 | member, not the whole file, and must exclude the header. | |
1030 | Fortunately for us, that is how the data is stored in the | |
1031 | origin field of the bfd and in the arelt_data. */ | |
1032 | offset = ibfd->origin; | |
1033 | filesize = arelt_size (ibfd); | |
1034 | } | |
1035 | else | |
1036 | { | |
1037 | offset = 0; | |
1038 | filesize = lseek (fd, 0, SEEK_END); | |
1039 | ||
1040 | /* We must copy filename attached to ibfd if it is not an archive | |
1041 | member since it may be freed by bfd_close below. */ | |
1042 | name = plugin_strdup (abfd, name); | |
1043 | } | |
1044 | ||
1045 | file.name = name; | |
1046 | file.offset = offset; | |
1047 | file.filesize = filesize; | |
1048 | file.fd = fd; | |
1049 | file.handle = input; | |
1050 | ||
f4b78d18 | 1051 | input->abfd = abfd; |
2aec968d L |
1052 | input->view_buffer.addr = NULL; |
1053 | input->view_buffer.filesize = 0; | |
1054 | input->view_buffer.offset = 0; | |
35a1e5f3 L |
1055 | input->fd = fd; |
1056 | input->offset = offset; | |
1057 | input->filesize = filesize; | |
1058 | input->name = plugin_strdup (abfd, ibfd->filename); | |
f4b78d18 | 1059 | |
35a1e5f3 | 1060 | if (plugin_call_claim_file (&file, &claimed)) |
02d00247 AM |
1061 | einfo (_("%P%F: %s: plugin reported error claiming file\n"), |
1062 | plugin_error_plugin ()); | |
f4b78d18 | 1063 | |
e13419c4 | 1064 | if (input->fd != -1 && ibfd->format == bfd_object) |
f4b78d18 L |
1065 | { |
1066 | /* FIXME: fd belongs to us, not the plugin. IR for GCC plugin, | |
1067 | which doesn't need fd after plugin_call_claim_file, is | |
1068 | stored in bfd_object file. Since GCC plugin before GCC 5 | |
1069 | doesn't call release_input_file, we close it here. IR for | |
1070 | LLVM plugin, which needs fd after plugin_call_claim_file and | |
1071 | calls release_input_file after it is done, is stored in | |
1072 | non-bfd_object file. This scheme doesn't work when a plugin | |
1073 | needs fd and its IR is stored in bfd_object file. */ | |
35a1e5f3 | 1074 | close (fd); |
f4b78d18 L |
1075 | input->fd = -1; |
1076 | } | |
1077 | ||
02d00247 AM |
1078 | if (claimed) |
1079 | { | |
1080 | /* Discard the real file's BFD and substitute the dummy one. */ | |
1081 | ||
1082 | /* BFD archive handling caches elements so we can't call | |
1083 | bfd_close for archives. */ | |
35a1e5f3 L |
1084 | if (!inarchive) |
1085 | bfd_close (ibfd); | |
1086 | bfd_make_readable (abfd); | |
f4b78d18 | 1087 | entry->the_bfd = abfd; |
66be1055 | 1088 | entry->flags.claimed = TRUE; |
02d00247 AM |
1089 | } |
1090 | else | |
1091 | { | |
1092 | /* If plugin didn't claim the file, we don't need the dummy bfd. | |
1093 | Can't avoid speculatively creating it, alas. */ | |
f4b78d18 | 1094 | bfd_close_all_done (abfd); |
66be1055 | 1095 | entry->flags.claimed = FALSE; |
02d00247 AM |
1096 | } |
1097 | } | |
1098 | ||
5d3236ee DK |
1099 | /* Call 'all symbols read' hook for all plugins. */ |
1100 | int | |
1101 | plugin_call_all_symbols_read (void) | |
1102 | { | |
1103 | plugin_t *curplug = plugins_list; | |
1104 | ||
1105 | /* Disable any further file-claiming. */ | |
1106 | no_more_claiming = TRUE; | |
1107 | ||
5d3236ee DK |
1108 | while (curplug) |
1109 | { | |
1110 | if (curplug->all_symbols_read_handler) | |
1111 | { | |
1112 | enum ld_plugin_status rv; | |
1113 | called_plugin = curplug; | |
1114 | rv = (*curplug->all_symbols_read_handler) (); | |
1115 | called_plugin = NULL; | |
1116 | if (rv != LDPS_OK) | |
1117 | set_plugin_error (curplug->name); | |
1118 | } | |
1119 | curplug = curplug->next; | |
1120 | } | |
1121 | return plugin_error_p () ? -1 : 0; | |
1122 | } | |
1123 | ||
e73d965c | 1124 | /* Call 'cleanup' hook for all plugins at exit. */ |
498cd2a0 | 1125 | void |
5d3236ee DK |
1126 | plugin_call_cleanup (void) |
1127 | { | |
1128 | plugin_t *curplug = plugins_list; | |
1129 | while (curplug) | |
1130 | { | |
1131 | if (curplug->cleanup_handler && !curplug->cleanup_done) | |
1132 | { | |
1133 | enum ld_plugin_status rv; | |
1134 | curplug->cleanup_done = TRUE; | |
1135 | called_plugin = curplug; | |
1136 | rv = (*curplug->cleanup_handler) (); | |
1137 | called_plugin = NULL; | |
1138 | if (rv != LDPS_OK) | |
d82184d7 L |
1139 | info_msg (_("%P: %s: error in plugin cleanup: %d (ignored)\n"), |
1140 | curplug->name, rv); | |
5d3236ee DK |
1141 | dlclose (curplug->dlhandle); |
1142 | } | |
1143 | curplug = curplug->next; | |
1144 | } | |
5d3236ee DK |
1145 | } |
1146 | ||
5d3236ee DK |
1147 | /* To determine which symbols should be resolved LDPR_PREVAILING_DEF |
1148 | and which LDPR_PREVAILING_DEF_IRONLY, we notice all the symbols as | |
35ed3f94 AM |
1149 | the linker adds them to the linker hash table. Mark those |
1150 | referenced from a non-IR file with non_ir_ref. We have to | |
1151 | notice_all symbols, because we won't necessarily know until later | |
1152 | which ones will be contributed by IR files. */ | |
9e2278f5 AM |
1153 | static bfd_boolean |
1154 | plugin_notice (struct bfd_link_info *info, | |
35ed3f94 | 1155 | struct bfd_link_hash_entry *h, |
46135103 | 1156 | struct bfd_link_hash_entry *inh, |
9e2278f5 AM |
1157 | bfd *abfd, |
1158 | asection *section, | |
16d96b5b | 1159 | bfd_vma value, |
46135103 | 1160 | flagword flags) |
5d3236ee | 1161 | { |
46135103 AM |
1162 | struct bfd_link_hash_entry *orig_h = h; |
1163 | ||
35ed3f94 | 1164 | if (h != NULL) |
5d3236ee | 1165 | { |
cd6eee13 AM |
1166 | bfd *sym_bfd; |
1167 | ||
46135103 AM |
1168 | if (h->type == bfd_link_hash_warning) |
1169 | h = h->u.i.link; | |
1170 | ||
4a2b04a7 | 1171 | /* Nothing to do here if this def/ref is from an IR dummy BFD. */ |
9e2278f5 | 1172 | if (is_ir_dummy_bfd (abfd)) |
4a2b04a7 | 1173 | ; |
9e2278f5 | 1174 | |
16d96b5b AM |
1175 | /* Making an indirect symbol counts as a reference unless this |
1176 | is a brand new symbol. */ | |
4a2b04a7 L |
1177 | else if (bfd_is_ind_section (section) |
1178 | || (flags & BSF_INDIRECT) != 0) | |
16d96b5b | 1179 | { |
46135103 AM |
1180 | /* ??? Some of this is questionable. See comments in |
1181 | _bfd_generic_link_add_one_symbol for case IND. */ | |
16d96b5b AM |
1182 | if (h->type != bfd_link_hash_new) |
1183 | { | |
16d96b5b | 1184 | h->non_ir_ref = TRUE; |
46135103 | 1185 | inh->non_ir_ref = TRUE; |
16d96b5b | 1186 | } |
46135103 AM |
1187 | else if (inh->type == bfd_link_hash_new) |
1188 | inh->non_ir_ref = TRUE; | |
16d96b5b AM |
1189 | } |
1190 | ||
1191 | /* Nothing to do here for warning symbols. */ | |
1192 | else if ((flags & BSF_WARNING) != 0) | |
1193 | ; | |
1194 | ||
1195 | /* Nothing to do here for constructor symbols. */ | |
1196 | else if ((flags & BSF_CONSTRUCTOR) != 0) | |
1197 | ; | |
1198 | ||
35ed3f94 | 1199 | /* If this is a ref, set non_ir_ref. */ |
16d96b5b | 1200 | else if (bfd_is_und_section (section)) |
3d5bef4c L |
1201 | { |
1202 | /* Replace the undefined dummy bfd with the real one. */ | |
1203 | if ((h->type == bfd_link_hash_undefined | |
1204 | || h->type == bfd_link_hash_undefweak) | |
46fed7f7 SL |
1205 | && (h->u.undef.abfd == NULL |
1206 | || (h->u.undef.abfd->flags & BFD_PLUGIN) != 0)) | |
3d5bef4c L |
1207 | h->u.undef.abfd = abfd; |
1208 | h->non_ir_ref = TRUE; | |
1209 | } | |
35ed3f94 AM |
1210 | |
1211 | /* Otherwise, it must be a new def. Ensure any symbol defined | |
1212 | in an IR dummy BFD takes on a new value from a real BFD. | |
1213 | Weak symbols are not normally overridden by a new weak | |
1214 | definition, and strong symbols will normally cause multiple | |
1215 | definition errors. Avoid this by making the symbol appear | |
1216 | to be undefined. */ | |
1217 | else if (((h->type == bfd_link_hash_defweak | |
1218 | || h->type == bfd_link_hash_defined) | |
cd6eee13 | 1219 | && is_ir_dummy_bfd (sym_bfd = h->u.def.section->owner)) |
35ed3f94 | 1220 | || (h->type == bfd_link_hash_common |
cd6eee13 AM |
1221 | && is_ir_dummy_bfd (sym_bfd = h->u.c.p->section->owner))) |
1222 | { | |
1223 | h->type = bfd_link_hash_undefweak; | |
1224 | h->u.undef.abfd = sym_bfd; | |
1225 | } | |
5d3236ee DK |
1226 | } |
1227 | ||
1228 | /* Continue with cref/nocrossref/trace-sym processing. */ | |
46135103 | 1229 | if (orig_h == NULL |
9e2278f5 AM |
1230 | || orig_notice_all |
1231 | || (info->notice_hash != NULL | |
46135103 | 1232 | && bfd_hash_lookup (info->notice_hash, orig_h->root.string, |
35ed3f94 | 1233 | FALSE, FALSE) != NULL)) |
46135103 AM |
1234 | return (*orig_callbacks->notice) (info, orig_h, inh, |
1235 | abfd, section, value, flags); | |
5d3236ee DK |
1236 | return TRUE; |
1237 | } |