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eb8061bf DD |
1 | /* Routines to help build PEI-format DLLs (Win32 etc) |
2 | Copyright (C) 1998 Free Software Foundation, Inc. | |
3 | Written by DJ Delorie <dj@cygnus.com> | |
4 | ||
5 | This file is part of GLD, the Gnu Linker. | |
6 | ||
7 | GLD 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 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GLD 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 GLD; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "bfdlink.h" | |
25 | #include "libiberty.h" | |
26 | ||
27 | #include "ld.h" | |
28 | #include "ldexp.h" | |
29 | #include "ldlang.h" | |
30 | #include "ldwrite.h" | |
31 | #include "ldmisc.h" | |
32 | #include "ldgram.h" | |
33 | #include "ldmain.h" | |
34 | #include "coff/internal.h" | |
35 | #include "../bfd/libcoff.h" | |
36 | #include "deffile.h" | |
37 | ||
38 | /************************************************************************ | |
39 | ||
40 | This file turns a regular Windows PE image into a DLL. Because of | |
41 | the complexity of this operation, it has been broken down into a | |
42 | number of separate modules which are all called by the main function | |
43 | at the end of this file. This function is not re-entrant and is | |
44 | normally only called once, so static variables are used to reduce | |
45 | the number of parameters and return values required. | |
46 | ||
47 | See also: ld/emultempl/pe.em | |
48 | ||
49 | ************************************************************************/ | |
50 | ||
51 | /* from emultempl/pe.em */ | |
52 | ||
53 | extern def_file *pe_def_file; | |
54 | extern int pe_dll_export_everything; | |
55 | extern int pe_dll_do_default_excludes; | |
56 | extern int pe_dll_kill_ats; | |
57 | extern int pe_dll_stdcall_aliases; | |
58 | ||
59 | /************************************************************************ | |
60 | ||
61 | static variables and types | |
62 | ||
63 | ************************************************************************/ | |
64 | ||
65 | static bfd_vma image_base; | |
66 | ||
67 | static bfd *filler_bfd; | |
68 | static struct sec *edata_s, *reloc_s; | |
69 | static unsigned char *edata_d, *reloc_d; | |
70 | static int edata_sz, reloc_sz; | |
71 | ||
72 | /************************************************************************ | |
73 | ||
74 | Helper functions for qsort. Relocs must be sorted so that we can write | |
75 | them out by pages. | |
76 | ||
77 | ************************************************************************/ | |
78 | ||
79 | static int | |
80 | reloc_sort (va, vb) | |
81 | const void *va, *vb; | |
82 | { | |
83 | unsigned long a = *(unsigned long *) va; | |
84 | unsigned long b = *(unsigned long *) vb; | |
85 | return a - b; | |
86 | } | |
87 | ||
88 | static int | |
89 | pe_export_sort (va, vb) | |
90 | const void *va, *vb; | |
91 | { | |
92 | def_file_export *a = (def_file_export *) va; | |
93 | def_file_export *b = (def_file_export *) vb; | |
94 | return strcmp (a->name, b->name); | |
95 | } | |
96 | ||
97 | /************************************************************************ | |
98 | ||
99 | Read and process the .DEF file | |
100 | ||
101 | ************************************************************************/ | |
102 | ||
103 | /* These correspond to the entries in pe_def_file->exports[]. I use | |
104 | exported_symbol_sections[i] to tag whether or not the symbol was | |
105 | defined, since we can't export symbols we don't have. */ | |
106 | ||
107 | static bfd_vma *exported_symbol_offsets; | |
108 | static struct sec **exported_symbol_sections; | |
109 | ||
110 | static int export_table_size; | |
111 | static int count_exported; | |
112 | static int count_exported_byname; | |
113 | static int count_with_ordinals; | |
114 | static const char *dll_name; | |
115 | static int min_ordinal, max_ordinal; | |
116 | static int *exported_symbols; | |
117 | ||
118 | typedef struct exclude_list_struct | |
119 | { | |
120 | char *string; | |
121 | struct exclude_list_struct *next; | |
122 | } | |
123 | exclude_list_struct; | |
124 | static struct exclude_list_struct *excludes = 0; | |
125 | ||
126 | void | |
127 | pe_dll_add_excludes (new_excludes) | |
128 | const char *new_excludes; | |
129 | { | |
130 | char *local_copy; | |
131 | char *exclude_string; | |
132 | ||
133 | local_copy = xstrdup (new_excludes); | |
134 | ||
135 | exclude_string = strtok (local_copy, ",:"); | |
136 | for (; exclude_string; exclude_string = strtok (NULL, ",:")) | |
137 | { | |
138 | struct exclude_list_struct *new_exclude; | |
139 | ||
140 | new_exclude = ((struct exclude_list_struct *) | |
141 | xmalloc (sizeof (struct exclude_list_struct))); | |
142 | new_exclude->string = (char *) xmalloc (strlen (exclude_string) + 1); | |
143 | strcpy (new_exclude->string, exclude_string); | |
144 | new_exclude->next = excludes; | |
145 | excludes = new_exclude; | |
146 | } | |
147 | ||
148 | free (local_copy); | |
149 | } | |
150 | ||
151 | static int | |
152 | auto_export (d, n) | |
153 | def_file *d; | |
154 | const char *n; | |
155 | { | |
156 | int i; | |
157 | struct exclude_list_struct *ex; | |
158 | for (i = 0; i < d->num_exports; i++) | |
159 | if (strcmp (d->exports[i].name, n) == 0) | |
160 | return 0; | |
161 | if (pe_dll_do_default_excludes) | |
162 | { | |
163 | if (strcmp (n, "DllMain@12") == 0) | |
164 | return 0; | |
165 | if (strcmp (n, "DllEntryPoint@0") == 0) | |
166 | return 0; | |
167 | if (strcmp (n, "impure_ptr") == 0) | |
168 | return 0; | |
169 | } | |
170 | for (ex = excludes; ex; ex = ex->next) | |
171 | if (strcmp (n, ex->string) == 0) | |
172 | return 0; | |
173 | return 1; | |
174 | } | |
175 | ||
176 | static void | |
177 | process_def_file (abfd, info) | |
178 | bfd *abfd; | |
179 | struct bfd_link_info *info; | |
180 | { | |
181 | int i, j; | |
182 | struct bfd_link_hash_entry *blhe; | |
183 | bfd *b; | |
184 | struct sec *s; | |
91c7ad9a | 185 | def_file_export *e=0; |
eb8061bf DD |
186 | |
187 | if (!pe_def_file) | |
188 | pe_def_file = def_file_empty (); | |
189 | ||
190 | /* First, run around to all the objects looking for the .drectve | |
191 | sections, and push those into the def file too */ | |
192 | ||
193 | for (b = info->input_bfds; b; b = b->link_next) | |
194 | { | |
195 | s = bfd_get_section_by_name (b, ".drectve"); | |
196 | if (s) | |
197 | { | |
198 | int size = bfd_get_section_size_before_reloc (s); | |
199 | char *buf = xmalloc (size); | |
200 | bfd_get_section_contents (b, s, buf, 0, size); | |
201 | def_file_add_directive (pe_def_file, buf, size); | |
202 | free (buf); | |
203 | } | |
204 | } | |
205 | ||
206 | /* Now, maybe export everything else the default way */ | |
207 | ||
69c4fd86 | 208 | if (pe_dll_export_everything || pe_def_file->num_exports == 0) |
eb8061bf DD |
209 | { |
210 | for (b = info->input_bfds; b; b = b->link_next) | |
211 | { | |
212 | asymbol **symbols; | |
213 | int nsyms, symsize; | |
214 | ||
215 | symsize = bfd_get_symtab_upper_bound (b); | |
216 | symbols = (asymbol **) xmalloc (symsize); | |
217 | nsyms = bfd_canonicalize_symtab (b, symbols); | |
218 | ||
219 | for (j = 0; j < nsyms; j++) | |
220 | { | |
221 | if ((symbols[j]->flags & (BSF_FUNCTION | BSF_GLOBAL)) | |
222 | == (BSF_FUNCTION | BSF_GLOBAL)) | |
223 | { | |
224 | const char *sn = symbols[j]->name; | |
225 | if (*sn == '_') | |
226 | sn++; | |
227 | if (auto_export (pe_def_file, sn)) | |
228 | def_file_add_export (pe_def_file, sn, 0, -1); | |
229 | } | |
230 | } | |
231 | } | |
232 | } | |
233 | ||
234 | #undef NE | |
235 | #define NE pe_def_file->num_exports | |
eb8061bf DD |
236 | |
237 | /* Canonicalize the export list */ | |
238 | ||
239 | if (pe_dll_kill_ats) | |
240 | { | |
241 | for (i = 0; i < NE; i++) | |
242 | { | |
91c7ad9a | 243 | if (strchr (pe_def_file->exports[i].name, '@')) |
eb8061bf DD |
244 | { |
245 | /* This will preserve internal_name, which may have been pointing | |
246 | to the same memory as name, or might not have */ | |
91c7ad9a | 247 | char *tmp = xstrdup (pe_def_file->exports[i].name); |
eb8061bf | 248 | *(strchr (tmp, '@')) = 0; |
91c7ad9a | 249 | pe_def_file->exports[i].name = tmp; |
eb8061bf DD |
250 | } |
251 | } | |
252 | } | |
253 | ||
254 | if (pe_dll_stdcall_aliases) | |
255 | { | |
256 | for (i = 0; i < NE; i++) | |
257 | { | |
91c7ad9a | 258 | if (strchr (pe_def_file->exports[i].name, '@')) |
eb8061bf | 259 | { |
91c7ad9a | 260 | char *tmp = xstrdup (pe_def_file->exports[i].name); |
eb8061bf DD |
261 | *(strchr (tmp, '@')) = 0; |
262 | if (auto_export (pe_def_file, tmp)) | |
91c7ad9a DD |
263 | def_file_add_export (pe_def_file, tmp, |
264 | pe_def_file->exports[i].internal_name, -1); | |
eb8061bf DD |
265 | else |
266 | free (tmp); | |
267 | } | |
268 | } | |
269 | } | |
270 | ||
a3606134 | 271 | e = pe_def_file->exports; /* convenience, but watch out for it changing */ |
91c7ad9a | 272 | |
eb8061bf DD |
273 | exported_symbol_offsets = (bfd_vma *) xmalloc (NE * sizeof (bfd_vma)); |
274 | exported_symbol_sections = (struct sec **) xmalloc (NE * sizeof (struct sec *)); | |
275 | ||
276 | memset (exported_symbol_sections, 0, NE * sizeof (struct sec *)); | |
277 | max_ordinal = 0; | |
278 | min_ordinal = 65536; | |
279 | count_exported = 0; | |
280 | count_exported_byname = 0; | |
281 | count_with_ordinals = 0; | |
282 | ||
283 | qsort (pe_def_file->exports, NE, sizeof (pe_def_file->exports[0]), pe_export_sort); | |
284 | for (i = 0, j = 0; i < NE; i++) | |
285 | { | |
286 | if (i > 0 && strcmp (e[i].name, e[i - 1].name) == 0) | |
287 | { | |
288 | /* This is a duplicate */ | |
289 | if (e[j - 1].ordinal != -1 | |
290 | && e[i].ordinal != -1 | |
291 | && e[j - 1].ordinal != e[i].ordinal) | |
292 | { | |
293 | /* xgettext:c-format */ | |
294 | einfo (_("%XError, duplicate EXPORT with oridinals: %s (%d vs %d)\n"), | |
295 | e[j - 1].name, e[j - 1].ordinal, e[i].ordinal); | |
296 | } | |
297 | else | |
298 | { | |
299 | /* xgettext:c-format */ | |
300 | einfo (_("Warning, duplicate EXPORT: %s\n"), | |
301 | e[j - 1].name); | |
302 | } | |
303 | if (e[i].ordinal) | |
304 | e[j - 1].ordinal = e[i].ordinal; | |
305 | e[j - 1].flag_private |= e[i].flag_private; | |
306 | e[j - 1].flag_constant |= e[i].flag_constant; | |
307 | e[j - 1].flag_noname |= e[i].flag_noname; | |
308 | e[j - 1].flag_data |= e[i].flag_data; | |
309 | } | |
310 | else | |
311 | { | |
312 | if (i != j) | |
313 | e[j] = e[i]; | |
314 | j++; | |
315 | } | |
316 | } | |
317 | pe_def_file->num_exports = j; /* == NE */ | |
318 | ||
319 | for (i = 0; i < NE; i++) | |
320 | { | |
321 | char *name = (char *) xmalloc (strlen (pe_def_file->exports[i].internal_name) + 2); | |
322 | *name = '_'; | |
323 | strcpy (name + 1, pe_def_file->exports[i].internal_name); | |
324 | ||
325 | blhe = bfd_link_hash_lookup (info->hash, | |
326 | name, | |
327 | false, false, true); | |
328 | ||
329 | if (blhe && (blhe->type == bfd_link_hash_defined)) | |
330 | { | |
331 | count_exported++; | |
332 | if (!pe_def_file->exports[i].flag_noname) | |
333 | count_exported_byname++; | |
334 | exported_symbol_offsets[i] = blhe->u.def.value; | |
335 | exported_symbol_sections[i] = blhe->u.def.section; | |
336 | if (pe_def_file->exports[i].ordinal != -1) | |
337 | { | |
338 | if (max_ordinal < pe_def_file->exports[i].ordinal) | |
339 | max_ordinal = pe_def_file->exports[i].ordinal; | |
340 | if (min_ordinal > pe_def_file->exports[i].ordinal) | |
341 | min_ordinal = pe_def_file->exports[i].ordinal; | |
342 | count_with_ordinals++; | |
343 | } | |
344 | } | |
e2586bc8 | 345 | else if (blhe && blhe->type == bfd_link_hash_undefined) |
eb8061bf DD |
346 | { |
347 | /* xgettext:c-format */ | |
e2586bc8 | 348 | einfo (_("%XCannot export %s: symbol not defined\n"), |
eb8061bf DD |
349 | pe_def_file->exports[i].internal_name); |
350 | } | |
e2586bc8 DD |
351 | else if (blhe) |
352 | { | |
353 | /* xgettext:c-format */ | |
354 | einfo (_("%XCannot export %s: symbol wrong type (%d vs %d)\n"), | |
355 | pe_def_file->exports[i].internal_name, | |
356 | blhe->type, bfd_link_hash_defined); | |
357 | } | |
eb8061bf DD |
358 | else |
359 | { | |
360 | /* xgettext:c-format */ | |
361 | einfo (_("%XCannot export %s: symbol not found\n"), | |
362 | pe_def_file->exports[i].internal_name); | |
363 | } | |
364 | free(name); | |
365 | } | |
eb8061bf DD |
366 | } |
367 | ||
368 | /************************************************************************ | |
369 | ||
370 | Build the bfd that will contain .edata and .reloc sections | |
371 | ||
372 | ************************************************************************/ | |
373 | ||
374 | static void | |
375 | build_filler_bfd () | |
376 | { | |
377 | static lang_input_statement_type *filler_file; | |
378 | filler_file = lang_add_input_file ("dll stuff", | |
379 | lang_input_file_is_fake_enum, | |
380 | NULL); | |
381 | filler_file->the_bfd = filler_bfd = bfd_create ("dll stuff", output_bfd); | |
382 | if (filler_bfd == NULL | |
383 | || !bfd_set_arch_mach (filler_bfd, | |
384 | bfd_get_arch (output_bfd), | |
385 | bfd_get_mach (output_bfd))) | |
386 | { | |
387 | einfo ("%X%P: can not create BFD %E\n"); | |
388 | return; | |
389 | } | |
390 | ||
391 | edata_s = bfd_make_section_old_way (filler_bfd, ".edata"); | |
392 | if (edata_s == NULL | |
393 | || !bfd_set_section_flags (filler_bfd, edata_s, | |
394 | (SEC_HAS_CONTENTS | |
395 | | SEC_ALLOC | |
396 | | SEC_LOAD | |
397 | | SEC_KEEP | |
398 | | SEC_IN_MEMORY))) | |
399 | { | |
400 | einfo ("%X%P: can not create .edata section: %E\n"); | |
401 | return; | |
402 | } | |
403 | bfd_set_section_size (filler_bfd, edata_s, edata_sz); | |
404 | ||
405 | reloc_s = bfd_make_section_old_way (filler_bfd, ".reloc"); | |
406 | if (reloc_s == NULL | |
407 | || !bfd_set_section_flags (filler_bfd, reloc_s, | |
408 | (SEC_HAS_CONTENTS | |
409 | | SEC_ALLOC | |
410 | | SEC_LOAD | |
411 | | SEC_KEEP | |
412 | | SEC_IN_MEMORY))) | |
413 | { | |
414 | einfo ("%X%P: can not create .reloc section: %E\n"); | |
415 | return; | |
416 | } | |
417 | bfd_set_section_size (filler_bfd, reloc_s, 0); | |
418 | ||
419 | ldlang_add_file (filler_file); | |
420 | } | |
421 | ||
422 | /************************************************************************ | |
423 | ||
424 | Gather all the exported symbols and build the .edata section | |
425 | ||
426 | ************************************************************************/ | |
427 | ||
428 | static void | |
429 | generate_edata (abfd, info) | |
430 | bfd *abfd; | |
431 | struct bfd_link_info *info; | |
432 | { | |
433 | int i, j, next_ordinal; | |
434 | int name_table_size = 0; | |
435 | const char *dlnp; | |
436 | ||
437 | /* First, we need to know how many exported symbols there are, | |
438 | and what the range of ordinals is. */ | |
439 | ||
440 | if (pe_def_file->name) | |
441 | { | |
442 | dll_name = pe_def_file->name; | |
443 | } | |
444 | else | |
445 | { | |
446 | dll_name = abfd->filename; | |
447 | for (dlnp = dll_name; *dlnp; dlnp++) | |
448 | { | |
449 | if (*dlnp == '\\' || *dlnp == '/' || *dlnp == ':') | |
450 | dll_name = dlnp + 1; | |
451 | } | |
452 | } | |
453 | ||
454 | if (count_with_ordinals && max_ordinal > count_exported) | |
455 | { | |
456 | if (min_ordinal > max_ordinal - count_exported + 1) | |
457 | min_ordinal = max_ordinal - count_exported + 1; | |
458 | } | |
459 | else | |
460 | { | |
461 | min_ordinal = 1; | |
462 | max_ordinal = count_exported; | |
463 | } | |
464 | export_table_size = max_ordinal - min_ordinal + 1; | |
465 | ||
466 | exported_symbols = (int *) xmalloc (export_table_size * sizeof (int)); | |
467 | for (i = 0; i < export_table_size; i++) | |
468 | exported_symbols[i] = -1; | |
469 | ||
470 | /* Now we need to assign ordinals to those that don't have them */ | |
471 | for (i = 0; i < NE; i++) | |
472 | { | |
473 | if (exported_symbol_sections[i]) | |
474 | { | |
475 | if (pe_def_file->exports[i].ordinal != -1) | |
476 | { | |
477 | int ei = pe_def_file->exports[i].ordinal - min_ordinal; | |
478 | int pi = exported_symbols[ei]; | |
479 | if (pi != -1) | |
480 | { | |
481 | /* xgettext:c-format */ | |
482 | einfo (_("%XError, oridinal used twice: %d (%s vs %s)\n"), | |
483 | pe_def_file->exports[i].ordinal, | |
484 | pe_def_file->exports[i].name, | |
485 | pe_def_file->exports[pi].name); | |
486 | } | |
487 | exported_symbols[ei] = i; | |
488 | } | |
489 | name_table_size += strlen (pe_def_file->exports[i].name) + 1; | |
490 | } | |
491 | } | |
492 | ||
493 | next_ordinal = min_ordinal; | |
494 | for (i = 0; i < NE; i++) | |
495 | if (exported_symbol_sections[i]) | |
496 | if (pe_def_file->exports[i].ordinal == -1) | |
497 | { | |
498 | while (exported_symbols[next_ordinal - min_ordinal] != -1) | |
499 | next_ordinal++; | |
500 | exported_symbols[next_ordinal - min_ordinal] = i; | |
501 | pe_def_file->exports[i].ordinal = next_ordinal; | |
502 | } | |
503 | ||
504 | /* OK, now we can allocate some memory */ | |
505 | ||
506 | edata_sz = (40 /* directory */ | |
507 | + 4 * export_table_size /* addresses */ | |
508 | + 4 * count_exported_byname /* name ptrs */ | |
509 | + 2 * count_exported_byname /* ordinals */ | |
510 | + name_table_size + strlen (dll_name) + 1); | |
511 | } | |
512 | ||
513 | static void | |
514 | fill_edata (abfd, info) | |
515 | bfd *abfd; | |
516 | struct bfd_link_info *info; | |
517 | { | |
518 | int i; | |
519 | unsigned char *edirectory; | |
520 | unsigned long *eaddresses; | |
521 | unsigned long *enameptrs; | |
522 | unsigned short *eordinals; | |
523 | unsigned char *enamestr; | |
524 | ||
525 | edata_d = (unsigned char *) xmalloc (edata_sz); | |
526 | ||
527 | /* Note use of array pointer math here */ | |
528 | edirectory = edata_d; | |
529 | eaddresses = (unsigned long *) (edata_d + 40); | |
530 | enameptrs = eaddresses + export_table_size; | |
531 | eordinals = (unsigned short *) (enameptrs + count_exported_byname); | |
532 | enamestr = (char *) (eordinals + count_exported_byname); | |
533 | ||
534 | #define ERVA(ptr) (((unsigned char *)(ptr) - edata_d) + edata_s->output_section->vma - image_base) | |
535 | ||
536 | memset (edata_d, 0, 40); | |
537 | if (pe_def_file->version_major != -1) | |
538 | { | |
539 | bfd_put_16 (abfd, pe_def_file->version_major, edata_d + 8); | |
540 | bfd_put_16 (abfd, pe_def_file->version_minor, edata_d + 10); | |
541 | } | |
542 | bfd_put_32 (abfd, ERVA (enamestr), edata_d + 12); | |
543 | strcpy (enamestr, dll_name); | |
544 | enamestr += strlen (enamestr) + 1; | |
545 | bfd_put_32 (abfd, min_ordinal, edata_d + 16); | |
546 | bfd_put_32 (abfd, export_table_size, edata_d + 20); | |
547 | bfd_put_32 (abfd, count_exported_byname, edata_d + 24); | |
548 | bfd_put_32 (abfd, ERVA (eaddresses), edata_d + 28); | |
549 | bfd_put_32 (abfd, ERVA (enameptrs), edata_d + 32); | |
550 | bfd_put_32 (abfd, ERVA (eordinals), edata_d + 36); | |
551 | ||
552 | /* Ok, now for the filling in part */ | |
553 | for (i = 0; i < export_table_size; i++) | |
554 | { | |
555 | int s = exported_symbols[i]; | |
556 | if (s != -1) | |
557 | { | |
558 | struct sec *ssec = exported_symbol_sections[s]; | |
559 | unsigned long srva = (exported_symbol_offsets[s] | |
560 | + ssec->output_section->vma | |
561 | + ssec->output_offset); | |
562 | ||
563 | bfd_put_32 (abfd, srva - image_base, (void *) (eaddresses + i)); | |
564 | if (!pe_def_file->exports[s].flag_noname) | |
565 | { | |
566 | char *ename = pe_def_file->exports[s].name; | |
567 | bfd_put_32 (abfd, ERVA (enamestr), (void *) enameptrs); | |
568 | strcpy (enamestr, ename[0] == '_' ? ename + 1 : ename); | |
569 | enamestr += strlen (enamestr) + 1; | |
570 | bfd_put_16 (abfd, i, (void *) eordinals); | |
571 | enameptrs++; | |
572 | } | |
573 | eordinals++; | |
574 | } | |
575 | } | |
576 | } | |
577 | ||
578 | /************************************************************************ | |
579 | ||
580 | Gather all the relocations and build the .reloc section | |
581 | ||
582 | ************************************************************************/ | |
583 | ||
584 | static void | |
585 | generate_reloc (abfd, info) | |
586 | bfd *abfd; | |
587 | struct bfd_link_info *info; | |
588 | { | |
589 | ||
590 | /* for .reloc stuff */ | |
591 | bfd_vma *reloc_addresses; | |
592 | int total_relocs = 0; | |
593 | int i, j; | |
594 | unsigned long sec_page = (unsigned long) (-1); | |
595 | unsigned long page_ptr, page_count; | |
596 | int bi; | |
597 | bfd *b; | |
598 | struct sec *s; | |
599 | ||
600 | total_relocs = 0; | |
601 | for (b = info->input_bfds; b; b = b->link_next) | |
602 | for (s = b->sections; s; s = s->next) | |
603 | total_relocs += s->reloc_count; | |
604 | ||
605 | reloc_addresses = (unsigned long *) xmalloc (total_relocs * sizeof (unsigned long)); | |
606 | ||
607 | total_relocs = 0; | |
608 | bi = 0; | |
609 | for (bi = 0, b = info->input_bfds; b; bi++, b = b->link_next) | |
610 | { | |
611 | arelent **relocs; | |
612 | int relsize, nrelocs, i; | |
613 | ||
614 | for (s = b->sections; s; s = s->next) | |
615 | { | |
616 | unsigned long sec_vma = s->output_section->vma + s->output_offset; | |
617 | asymbol **symbols; | |
618 | int nsyms, symsize; | |
619 | ||
620 | symsize = bfd_get_symtab_upper_bound (b); | |
621 | symbols = (asymbol **) xmalloc (symsize); | |
622 | nsyms = bfd_canonicalize_symtab (b, symbols); | |
623 | ||
624 | relsize = bfd_get_reloc_upper_bound (b, s); | |
625 | relocs = (arelent **) xmalloc ((size_t) relsize); | |
626 | nrelocs = bfd_canonicalize_reloc (b, s, relocs, symbols); | |
627 | ||
628 | for (i = 0; i < nrelocs; i++) | |
629 | { | |
630 | if (!relocs[i]->howto->pc_relative) | |
631 | { | |
632 | switch (relocs[i]->howto->bitsize) | |
633 | { | |
634 | case 32: | |
635 | reloc_addresses[total_relocs++] = sec_vma + relocs[i]->address; | |
636 | break; | |
637 | default: | |
638 | /* xgettext:c-format */ | |
639 | einfo (_("%XError: %d-bit reloc in dll\n"), | |
640 | relocs[i]->howto->bitsize); | |
641 | break; | |
642 | } | |
643 | } | |
644 | } | |
645 | free (relocs); | |
646 | /* Warning: the allocated symbols are remembered in BFD and reused | |
647 | later, so don't free them! */ | |
648 | /* free(symbols); */ | |
649 | } | |
650 | } | |
651 | ||
652 | /* At this point, we have total_relocs relocation addresses in | |
653 | reloc_addresses, which are all suitable for the .reloc section. | |
654 | We must now create the new sections. */ | |
655 | ||
656 | qsort (reloc_addresses, total_relocs, sizeof (unsigned long), reloc_sort); | |
657 | ||
658 | for (i = 0; i < total_relocs; i++) | |
659 | { | |
660 | unsigned long this_page = (reloc_addresses[i] >> 12); | |
661 | if (this_page != sec_page) | |
662 | { | |
663 | reloc_sz = (reloc_sz + 3) & ~3; /* 4-byte align */ | |
664 | reloc_sz += 8; | |
665 | sec_page = this_page; | |
666 | } | |
667 | reloc_sz += 2; | |
668 | } | |
669 | reloc_sz = (reloc_sz + 3) & ~3; /* 4-byte align */ | |
670 | ||
671 | reloc_d = (unsigned char *) xmalloc (reloc_sz); | |
672 | ||
673 | sec_page = (unsigned long) (-1); | |
674 | reloc_sz = 0; | |
675 | page_ptr = (unsigned long) (-1); | |
676 | page_count = 0; | |
677 | for (i = 0; i < total_relocs; i++) | |
678 | { | |
679 | unsigned long rva = reloc_addresses[i] - image_base; | |
680 | unsigned long this_page = (rva & ~0xfff); | |
681 | if (this_page != sec_page) | |
682 | { | |
683 | while (reloc_sz & 3) | |
684 | reloc_d[reloc_sz++] = 0; | |
685 | if (page_ptr != (unsigned long) (-1)) | |
686 | bfd_put_32 (abfd, reloc_sz - page_ptr, reloc_d + page_ptr + 4); | |
687 | bfd_put_32 (abfd, this_page, reloc_d + reloc_sz); | |
688 | page_ptr = reloc_sz; | |
689 | reloc_sz += 8; | |
690 | sec_page = this_page; | |
691 | page_count = 0; | |
692 | } | |
693 | bfd_put_16 (abfd, (rva & 0xfff) + 0x3000, reloc_d + reloc_sz); | |
694 | reloc_sz += 2; | |
695 | page_count++; | |
696 | } | |
697 | while (reloc_sz & 3) | |
698 | reloc_d[reloc_sz++] = 0; | |
699 | if (page_ptr != (unsigned long) (-1)) | |
700 | bfd_put_32 (abfd, reloc_sz - page_ptr, reloc_d + page_ptr + 4); | |
701 | while (reloc_sz < reloc_s->_raw_size) | |
702 | reloc_d[reloc_sz++] = 0; | |
703 | } | |
704 | ||
705 | /************************************************************************ | |
706 | ||
707 | Given the exiting def_file structure, print out a .DEF file that | |
708 | corresponds to it. | |
709 | ||
710 | ************************************************************************/ | |
711 | ||
712 | static void | |
713 | quoteput (s, f, needs_quotes) | |
714 | char *s; | |
715 | FILE * f; | |
716 | int needs_quotes; | |
717 | { | |
718 | char *cp; | |
719 | for (cp = s; *cp; cp++) | |
720 | if (*cp == '\'' || *cp == '"' || *cp == '\\' || isspace (*cp) || *cp == ',' | |
721 | || *cp == ';') | |
722 | needs_quotes = 1; | |
723 | if (needs_quotes) | |
724 | { | |
725 | putc ('"', f); | |
726 | while (*s) | |
727 | { | |
728 | if (*s == '"' || *s == '\\') | |
729 | putc ('\\', f); | |
730 | putc (*s, f); | |
731 | s++; | |
732 | } | |
733 | putc ('"', f); | |
734 | } | |
735 | else | |
736 | fputs (s, f); | |
737 | } | |
738 | ||
739 | void | |
740 | pe_dll_generate_def_file (pe_out_def_filename) | |
741 | char *pe_out_def_filename; | |
742 | { | |
743 | int i; | |
744 | FILE *out = fopen (pe_out_def_filename, "w"); | |
745 | if (out == NULL) | |
746 | { | |
747 | /* xgettext:c-format */ | |
748 | einfo (_("%s: Can't open output def file %s\n"), | |
749 | program_name, pe_out_def_filename); | |
750 | } | |
751 | ||
e2586bc8 | 752 | if (pe_def_file) |
eb8061bf | 753 | { |
e2586bc8 DD |
754 | if (pe_def_file->name) |
755 | { | |
756 | if (pe_def_file->is_dll) | |
757 | fprintf (out, "LIBRARY "); | |
758 | else | |
759 | fprintf (out, "NAME "); | |
760 | quoteput (pe_def_file->name, out, 1); | |
761 | if (pe_def_file->base_address != (bfd_vma) (-1)) | |
762 | fprintf (out, " BASE=0x%x", pe_def_file->base_address); | |
763 | fprintf (out, "\n"); | |
764 | } | |
eb8061bf | 765 | |
e2586bc8 DD |
766 | if (pe_def_file->description) |
767 | { | |
768 | fprintf (out, "DESCRIPTION "); | |
769 | quoteput (pe_def_file->description, out, 1); | |
770 | fprintf (out, "\n"); | |
771 | } | |
eb8061bf | 772 | |
e2586bc8 DD |
773 | if (pe_def_file->version_minor) |
774 | fprintf (out, "VERSION %d.%d\n", pe_def_file->version_major, | |
775 | pe_def_file->version_minor); | |
776 | else | |
777 | fprintf (out, "VERSION %d\n", pe_def_file->version_major); | |
778 | ||
779 | if (pe_def_file->stack_reserve != -1 || pe_def_file->heap_reserve != -1) | |
780 | fprintf (out, "\n"); | |
781 | ||
782 | if (pe_def_file->stack_commit != -1) | |
783 | fprintf (out, "STACKSIZE 0x%x,0x%x\n", | |
784 | pe_def_file->stack_reserve, pe_def_file->stack_commit); | |
785 | else if (pe_def_file->stack_reserve != -1) | |
786 | fprintf (out, "STACKSIZE 0x%x\n", pe_def_file->stack_reserve); | |
787 | if (pe_def_file->heap_commit != -1) | |
788 | fprintf (out, "HEAPSIZE 0x%x,0x%x\n", | |
789 | pe_def_file->heap_reserve, pe_def_file->heap_commit); | |
790 | else if (pe_def_file->heap_reserve != -1) | |
791 | fprintf (out, "HEAPSIZE 0x%x\n", pe_def_file->heap_reserve); | |
792 | ||
793 | if (pe_def_file->num_section_defs > 0) | |
eb8061bf | 794 | { |
e2586bc8 DD |
795 | fprintf (out, "\nSECTIONS\n\n"); |
796 | for (i = 0; i < pe_def_file->num_section_defs; i++) | |
eb8061bf | 797 | { |
e2586bc8 DD |
798 | fprintf (out, " "); |
799 | quoteput (pe_def_file->section_defs[i].name, out, 0); | |
800 | if (pe_def_file->section_defs[i].class) | |
801 | { | |
802 | fprintf (out, " CLASS "); | |
803 | quoteput (pe_def_file->section_defs[i].class, out, 0); | |
804 | } | |
805 | if (pe_def_file->section_defs[i].flag_read) | |
806 | fprintf (out, " READ"); | |
807 | if (pe_def_file->section_defs[i].flag_write) | |
808 | fprintf (out, " WRITE"); | |
809 | if (pe_def_file->section_defs[i].flag_execute) | |
810 | fprintf (out, " EXECUTE"); | |
811 | if (pe_def_file->section_defs[i].flag_shared) | |
812 | fprintf (out, " SHARED"); | |
813 | fprintf (out, "\n"); | |
eb8061bf | 814 | } |
eb8061bf | 815 | } |
eb8061bf | 816 | |
e2586bc8 | 817 | if (pe_def_file->num_exports > 0) |
eb8061bf | 818 | { |
e2586bc8 DD |
819 | fprintf (out, "\nEXPORTS\n\n"); |
820 | for (i = 0; i < pe_def_file->num_exports; i++) | |
eb8061bf | 821 | { |
e2586bc8 DD |
822 | def_file_export *e = pe_def_file->exports + i; |
823 | fprintf (out, " "); | |
824 | quoteput (e->name, out, 0); | |
825 | if (e->internal_name && strcmp (e->internal_name, e->name)) | |
826 | { | |
827 | fprintf (out, " = "); | |
828 | quoteput (e->internal_name, out, 0); | |
829 | } | |
830 | if (e->ordinal != -1) | |
831 | fprintf (out, " @%d", e->ordinal); | |
832 | if (e->flag_private) | |
833 | fprintf (out, " PRIVATE"); | |
834 | if (e->flag_constant) | |
835 | fprintf (out, " CONSTANT"); | |
836 | if (e->flag_noname) | |
837 | fprintf (out, " NONAME"); | |
838 | if (e->flag_data) | |
839 | fprintf (out, " DATA"); | |
840 | ||
841 | fprintf (out, "\n"); | |
eb8061bf | 842 | } |
eb8061bf | 843 | } |
eb8061bf | 844 | |
e2586bc8 | 845 | if (pe_def_file->num_imports > 0) |
eb8061bf | 846 | { |
e2586bc8 DD |
847 | fprintf (out, "\nIMPORTS\n\n"); |
848 | for (i = 0; i < pe_def_file->num_imports; i++) | |
eb8061bf | 849 | { |
e2586bc8 DD |
850 | def_file_import *im = pe_def_file->imports + i; |
851 | fprintf (out, " "); | |
852 | if (im->internal_name | |
853 | && (!im->name || strcmp (im->internal_name, im->name))) | |
854 | { | |
855 | quoteput (im->internal_name, out, 0); | |
856 | fprintf (out, " = "); | |
857 | } | |
858 | quoteput (im->module->name, out, 0); | |
859 | fprintf (out, "."); | |
860 | if (im->name) | |
861 | quoteput (im->name, out, 0); | |
862 | else | |
863 | fprintf (out, "%d", im->ordinal); | |
864 | fprintf (out, "\n"); | |
eb8061bf | 865 | } |
eb8061bf DD |
866 | } |
867 | } | |
e2586bc8 DD |
868 | else |
869 | fprintf (out, _("; no contents available\n")); | |
eb8061bf DD |
870 | |
871 | if (fclose (out) == EOF) | |
872 | { | |
873 | /* xgettext:c-format */ | |
874 | einfo (_("%P: Error closing file `%s'\n"), pe_out_def_filename); | |
875 | } | |
876 | } | |
877 | ||
878 | /************************************************************************ | |
879 | ||
880 | These are the main functions, called from the emulation. The first | |
881 | is called after the bfds are read, so we can guess at how much space | |
882 | we need. The second is called after everything is placed, so we | |
883 | can put the right values in place. | |
884 | ||
885 | ************************************************************************/ | |
886 | ||
887 | void | |
888 | pe_dll_build_sections (abfd, info) | |
889 | bfd *abfd; | |
890 | struct bfd_link_info *info; | |
891 | { | |
892 | process_def_file (abfd, info); | |
893 | ||
894 | generate_edata (abfd, info); | |
895 | build_filler_bfd (); | |
896 | } | |
897 | ||
898 | void | |
899 | pe_dll_fill_sections (abfd, info) | |
900 | bfd *abfd; | |
901 | struct bfd_link_info *info; | |
902 | { | |
903 | image_base = pe_data (abfd)->pe_opthdr.ImageBase; | |
904 | ||
905 | generate_reloc (abfd, info); | |
906 | if (reloc_sz > 0) | |
907 | { | |
908 | bfd_set_section_size (filler_bfd, reloc_s, reloc_sz); | |
909 | ||
910 | /* Resize the sections. */ | |
911 | lang_size_sections (stat_ptr->head, abs_output_section, | |
912 | &stat_ptr->head, 0, (bfd_vma) 0, false); | |
913 | ||
914 | /* Redo special stuff. */ | |
915 | ldemul_after_allocation (); | |
916 | ||
917 | /* Do the assignments again. */ | |
918 | lang_do_assignments (stat_ptr->head, | |
919 | abs_output_section, | |
920 | (fill_type) 0, (bfd_vma) 0); | |
921 | } | |
922 | ||
923 | fill_edata (abfd, info); | |
924 | ||
925 | pe_data (abfd)->dll = 1; | |
926 | ||
927 | edata_s->contents = edata_d; | |
928 | reloc_s->contents = reloc_d; | |
929 | } |