Fix gnuv3_pass_by_reference to treat dynamic classes as non-trivial.
[deliverable/binutils-gdb.git] / bfd / plugin.c
CommitLineData
ce3c775b 1/* Plugin support for BFD.
4b95cf5c 2 Copyright (C) 2009-2014 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
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29#elif defined (HAVE_WINDOWS_H)
30#include <windows.h>
31#else
32#error Unknown how to handle dynamic-load-libraries.
33#endif
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34#include <stdarg.h>
35#include "plugin-api.h"
ce3c775b
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36#include "plugin.h"
37#include "libbfd.h"
38#include "libiberty.h"
39#include <dirent.h>
40
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KT
41#if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)
42
43#define RTLD_NOW 0 /* Dummy value. */
44
45static void *
46dlopen (const char *file, int mode ATTRIBUTE_UNUSED)
47{
48 return LoadLibrary (file);
49}
50
51static void *
52dlsym (void *handle, const char *name)
53{
54 return GetProcAddress (handle, name);
55}
56
57static int ATTRIBUTE_UNUSED
58dlclose (void *handle)
59{
60 FreeLibrary (handle);
61 return 0;
62}
63
64static const char *
65dlerror (void)
66{
67 return "Unable to load DLL.";
68}
69
70#endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */
71
ce3c775b
NC
72#define bfd_plugin_close_and_cleanup _bfd_generic_close_and_cleanup
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
76#define bfd_plugin_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
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
81#define bfd_plugin_core_file_matches_executable_p generic_core_file_matches_executable_p
82#define bfd_plugin_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
83#define bfd_plugin_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
84#define bfd_plugin_get_lineno _bfd_nosymbols_get_lineno
85#define bfd_plugin_find_nearest_line _bfd_nosymbols_find_nearest_line
86#define bfd_plugin_find_inliner_info _bfd_nosymbols_find_inliner_info
87#define bfd_plugin_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
88#define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols
89#define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
90#define bfd_plugin_set_arch_mach bfd_default_set_arch_mach
91#define bfd_plugin_set_section_contents _bfd_generic_set_section_contents
92#define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
93#define bfd_plugin_bfd_relax_section bfd_generic_relax_section
94#define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
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95#define bfd_plugin_bfd_link_add_symbols _bfd_generic_link_add_symbols
96#define bfd_plugin_bfd_link_just_syms _bfd_generic_link_just_syms
97#define bfd_plugin_bfd_final_link _bfd_generic_final_link
98#define bfd_plugin_bfd_link_split_section _bfd_generic_link_split_section
99#define bfd_plugin_bfd_gc_sections bfd_generic_gc_sections
ae17ab41 100#define bfd_plugin_bfd_lookup_section_flags bfd_generic_lookup_section_flags
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101#define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections
102#define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section
103#define bfd_plugin_bfd_discard_group bfd_generic_discard_group
104#define bfd_plugin_section_already_linked _bfd_generic_section_already_linked
105#define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol
69a630b5 106#define bfd_plugin_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type
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107
108static enum ld_plugin_status
109message (int level ATTRIBUTE_UNUSED,
110 const char * format, ...)
111{
112 va_list args;
113 va_start (args, format);
114 printf ("bfd plugin: ");
115 vprintf (format, args);
d9b21463 116 putchar ('\n');
ce3c775b
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117 va_end (args);
118 return LDPS_OK;
119}
120
121/* Register a claim-file handler. */
122static ld_plugin_claim_file_handler claim_file;
123
124static enum ld_plugin_status
125register_claim_file (ld_plugin_claim_file_handler handler)
126{
127 claim_file = handler;
128 return LDPS_OK;
129}
130
131static enum ld_plugin_status
132add_symbols (void * handle,
133 int nsyms,
134 const struct ld_plugin_symbol * syms)
135{
136 bfd *abfd = handle;
137 struct plugin_data_struct *plugin_data =
5bb3703f 138 bfd_alloc (abfd, sizeof (plugin_data_struct));
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139
140 plugin_data->nsyms = nsyms;
141 plugin_data->syms = syms;
142
143 if (nsyms != 0)
144 abfd->flags |= HAS_SYMS;
145
146 abfd->tdata.plugin_data = plugin_data;
147 return LDPS_OK;
148}
149
fc579192
NC
150static const char *plugin_program_name;
151
152void
153bfd_plugin_set_program_name (const char *program_name)
154{
155 plugin_program_name = program_name;
156}
ce3c775b
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157
158static int
e44f5bef 159try_claim (bfd *abfd)
ce3c775b 160{
e44f5bef
MT
161 int claimed = 0;
162 struct ld_plugin_input_file file;
163 bfd *iobfd;
164
165 file.name = abfd->filename;
166
167 if (abfd->my_archive)
168 {
169 iobfd = abfd->my_archive;
170 file.offset = abfd->origin;
171 file.filesize = arelt_size (abfd);
172 }
173 else
174 {
175 iobfd = abfd;
176 file.offset = 0;
177 file.filesize = 0;
178 }
179
180 if (!iobfd->iostream && !bfd_open_file (iobfd))
181 return 0;
182
183 file.fd = fileno ((FILE *) iobfd->iostream);
184
185 if (!abfd->my_archive)
186 {
187 struct stat stat_buf;
188 if (fstat (file.fd, &stat_buf))
189 return 0;
190 file.filesize = stat_buf.st_size;
191 }
192
193 file.handle = abfd;
194 off_t cur_offset = lseek(file.fd, 0, SEEK_CUR);
195 claim_file (&file, &claimed);
196 lseek(file.fd, cur_offset, SEEK_SET);
197 if (!claimed)
198 return 0;
199
200 return 1;
201}
202
203static int
204try_load_plugin (const char *pname, bfd *abfd)
205{
206 void *plugin_handle;
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207 int tv_size = 4;
208 struct ld_plugin_tv tv[tv_size];
209 int i;
210 ld_plugin_onload onload;
211 enum ld_plugin_status status;
212
213 plugin_handle = dlopen (pname, RTLD_NOW);
214 if (!plugin_handle)
215 {
216 (*_bfd_error_handler)("%s\n", dlerror ());
217 return 0;
218 }
219
220 onload = dlsym (plugin_handle, "onload");
221 if (!onload)
222 goto err;
223
224 i = 0;
225 tv[i].tv_tag = LDPT_MESSAGE;
226 tv[i].tv_u.tv_message = message;
227
228 ++i;
229 tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
230 tv[i].tv_u.tv_register_claim_file = register_claim_file;
231
232 ++i;
233 tv[i].tv_tag = LDPT_ADD_SYMBOLS;
234 tv[i].tv_u.tv_add_symbols = add_symbols;
235
236 ++i;
237 tv[i].tv_tag = LDPT_NULL;
238 tv[i].tv_u.tv_val = 0;
239
240 status = (*onload)(tv);
241
242 if (status != LDPS_OK)
243 goto err;
244
245 if (!claim_file)
246 goto err;
247
e44f5bef
MT
248 if (!try_claim (abfd))
249 goto err;
250
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251 return 1;
252
253 err:
254 plugin_handle = NULL;
255 return 0;
256}
257
258static const char *plugin_name;
259
260void
261bfd_plugin_set_plugin (const char *p)
262{
263 plugin_name = p;
264}
265
266static int
e44f5bef 267load_plugin (bfd *abfd)
ce3c775b
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268{
269 char *plugin_dir;
270 char *p;
271 DIR *d;
272 struct dirent *ent;
273 int found = 0;
274
275 if (plugin_name)
e44f5bef 276 return try_load_plugin (plugin_name, abfd);
ce3c775b 277
fc579192 278 if (plugin_program_name == NULL)
ce3c775b
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279 return 0;
280
281 plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
fc579192 282 p = make_relative_prefix (plugin_program_name,
ce3c775b
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283 BINDIR,
284 plugin_dir);
285 free (plugin_dir);
286 plugin_dir = NULL;
287
288 d = opendir (p);
289 if (!d)
290 goto out;
291
292 while ((ent = readdir (d)))
293 {
294 char *full_name;
c41ba836 295 struct stat s;
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296
297 full_name = concat (p, "/", ent->d_name, NULL);
c41ba836 298 if (stat(full_name, &s) == 0 && S_ISREG (s.st_mode))
e44f5bef 299 found = try_load_plugin (full_name, abfd);
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300 free (full_name);
301 if (found)
302 break;
303 }
304
305 out:
306 free (p);
307 if (d)
308 closedir (d);
309
310 return found;
311}
312
313
314static const bfd_target *
315bfd_plugin_object_p (bfd *abfd)
316{
e44f5bef 317 if (!load_plugin (abfd))
ce3c775b
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318 return NULL;
319
320 return abfd->xvec;
321}
322
323/* Copy any private info we understand from the input bfd
324 to the output bfd. */
325
326static bfd_boolean
327bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
328 bfd *obfd ATTRIBUTE_UNUSED)
329{
330 BFD_ASSERT (0);
331 return TRUE;
332}
333
334/* Copy any private info we understand from the input section
335 to the output section. */
336
337static bfd_boolean
338bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
339 asection *isection ATTRIBUTE_UNUSED,
340 bfd *obfd ATTRIBUTE_UNUSED,
341 asection *osection ATTRIBUTE_UNUSED)
342{
343 BFD_ASSERT (0);
344 return TRUE;
345}
346
347/* Copy any private info we understand from the input symbol
348 to the output symbol. */
349
350static bfd_boolean
351bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
352 asymbol *isymbol ATTRIBUTE_UNUSED,
353 bfd *obfd ATTRIBUTE_UNUSED,
354 asymbol *osymbol ATTRIBUTE_UNUSED)
355{
356 BFD_ASSERT (0);
357 return TRUE;
358}
359
360static bfd_boolean
361bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, PTR ptr ATTRIBUTE_UNUSED)
362{
363 BFD_ASSERT (0);
364 return TRUE;
365}
366
367static char *
368bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED)
369{
370 BFD_ASSERT (0);
371 return NULL;
372}
373
374static int
375bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
261b8d08
PA
376{
377 BFD_ASSERT (0);
378 return 0;
379}
380
381static int
382bfd_plugin_core_file_pid (bfd *abfd ATTRIBUTE_UNUSED)
ce3c775b
NC
383{
384 BFD_ASSERT (0);
385 return 0;
386}
387
388static long
389bfd_plugin_get_symtab_upper_bound (bfd *abfd)
390{
391 struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
392 long nsyms = plugin_data->nsyms;
393
394 BFD_ASSERT (nsyms >= 0);
395
396 return ((nsyms + 1) * sizeof (asymbol *));
397}
398
399static flagword
400convert_flags (const struct ld_plugin_symbol *sym)
401{
402 switch (sym->def)
68ffbac6 403 {
ce3c775b
NC
404 case LDPK_DEF:
405 case LDPK_COMMON:
406 case LDPK_UNDEF:
407 return BSF_GLOBAL;
408
409 case LDPK_WEAKUNDEF:
410 case LDPK_WEAKDEF:
411 return BSF_GLOBAL | BSF_WEAK;
412
413 default:
414 BFD_ASSERT (0);
415 return 0;
416 }
417}
418
419static long
420bfd_plugin_canonicalize_symtab (bfd *abfd,
421 asymbol **alocation)
422{
423 struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
424 long nsyms = plugin_data->nsyms;
425 const struct ld_plugin_symbol *syms = plugin_data->syms;
426 static asection fake_section;
427 static asection fake_common_section;
428 int i;
429
430 fake_section.name = ".text";
431 fake_common_section.flags = SEC_IS_COMMON;
432
433 for (i = 0; i < nsyms; i++)
434 {
68ffbac6 435 asymbol *s = bfd_alloc (abfd, sizeof (asymbol));
ce3c775b
NC
436
437 BFD_ASSERT (s);
438 alocation[i] = s;
439
440 s->the_bfd = abfd;
441 s->name = syms[i].name;
442 s->value = 0;
443 s->flags = convert_flags (&syms[i]);
444 switch (syms[i].def)
445 {
446 case LDPK_COMMON:
447 s->section = &fake_common_section;
448 break;
449 case LDPK_UNDEF:
450 case LDPK_WEAKUNDEF:
451 s->section = bfd_und_section_ptr;
452 break;
453 case LDPK_DEF:
454 case LDPK_WEAKDEF:
455 s->section = &fake_section;
456 break;
457 default:
458 BFD_ASSERT (0);
459 }
460
461 s->udata.p = (void *) &syms[i];
462 }
463
464 return nsyms;
465}
466
467static void
468bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED,
469 PTR afile ATTRIBUTE_UNUSED,
470 asymbol *symbol ATTRIBUTE_UNUSED,
471 bfd_print_symbol_type how ATTRIBUTE_UNUSED)
472{
473 BFD_ASSERT (0);
474}
475
476static void
477bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
478 asymbol *symbol,
479 symbol_info *ret)
480{
481 bfd_symbol_info (symbol, ret);
482}
483
484/* Make an empty symbol. */
485
486static asymbol *
487bfd_plugin_make_empty_symbol (bfd *abfd)
488{
d3ce72d0
NC
489 asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol));
490 if (new_symbol == NULL)
491 return new_symbol;
492 new_symbol->the_bfd = abfd;
493 return new_symbol;
ce3c775b
NC
494}
495
496static int
497bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
498 struct bfd_link_info *info ATTRIBUTE_UNUSED)
499{
500 BFD_ASSERT (0);
501 return 0;
502}
503
ce3c775b
NC
504const bfd_target plugin_vec =
505{
506 "plugin", /* Name. */
507 bfd_target_unknown_flavour,
508 BFD_ENDIAN_LITTLE, /* Target byte order. */
509 BFD_ENDIAN_LITTLE, /* Target headers byte order. */
510 (HAS_RELOC | EXEC_P | /* Object flags. */
511 HAS_LINENO | HAS_DEBUG |
512 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
513 (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
514 | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags. */
515 0, /* symbol_leading_char. */
516 '/', /* ar_pad_char. */
517 15, /* ar_max_namelen. */
0aabe54e 518 0, /* match priority. */
ce3c775b
NC
519
520 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
521 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
522 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
523 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
524 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
525 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
526
527 { /* bfd_check_format. */
528 _bfd_dummy_target,
529 bfd_plugin_object_p,
530 bfd_generic_archive_p,
531 _bfd_dummy_target
532 },
533 { /* bfd_set_format. */
534 bfd_false,
4846b70a 535 bfd_false,
ce3c775b
NC
536 _bfd_generic_mkarchive,
537 bfd_false,
538 },
539 { /* bfd_write_contents. */
540 bfd_false,
541 bfd_false,
542 _bfd_write_archive_contents,
543 bfd_false,
544 },
545
546 BFD_JUMP_TABLE_GENERIC (bfd_plugin),
547 BFD_JUMP_TABLE_COPY (bfd_plugin),
548 BFD_JUMP_TABLE_CORE (bfd_plugin),
549 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
550 BFD_JUMP_TABLE_SYMBOLS (bfd_plugin),
551 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
552 BFD_JUMP_TABLE_WRITE (bfd_plugin),
553 BFD_JUMP_TABLE_LINK (bfd_plugin),
554 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
555
556 NULL,
557
558 NULL /* backend_data. */
559};
98950613 560#endif /* BFD_SUPPORTS_PLUGIN */
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