Commit | Line | Data |
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252b5132 | 1 | /* COFF specific linker code. |
5f771d47 | 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc. |
252b5132 RH |
3 | Written by Ian Lance Taylor, Cygnus Support. |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* This file contains the COFF backend linker code. */ | |
22 | ||
23 | #include "bfd.h" | |
24 | #include "sysdep.h" | |
25 | #include "bfdlink.h" | |
26 | #include "libbfd.h" | |
27 | #include "coff/internal.h" | |
28 | #include "libcoff.h" | |
29 | ||
30 | static boolean coff_link_add_object_symbols | |
31 | PARAMS ((bfd *, struct bfd_link_info *)); | |
32 | static boolean coff_link_check_archive_element | |
33 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); | |
34 | static boolean coff_link_check_ar_symbols | |
35 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); | |
36 | static boolean coff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *)); | |
37 | static char *dores_com PARAMS ((char *, bfd *, int)); | |
38 | static char *get_name PARAMS ((char *, char **)); | |
39 | static int process_embedded_commands | |
40 | PARAMS ((bfd *, struct bfd_link_info *, bfd *)); | |
41 | static void mark_relocs PARAMS ((struct coff_final_link_info *, bfd *)); | |
42 | ||
b2d638c7 ILT |
43 | /* Define macros so that the ISFCN, et. al., macros work correctly. |
44 | These macros are defined in include/coff/internal.h in terms of | |
45 | N_TMASK, etc. These definitions require a user to define local | |
46 | variables with the appropriate names, and with values from the | |
47 | coff_data (abfd) structure. */ | |
48 | ||
49 | #define N_TMASK n_tmask | |
50 | #define N_BTSHFT n_btshft | |
51 | #define N_BTMASK n_btmask | |
52 | ||
252b5132 RH |
53 | /* Create an entry in a COFF linker hash table. */ |
54 | ||
55 | struct bfd_hash_entry * | |
56 | _bfd_coff_link_hash_newfunc (entry, table, string) | |
57 | struct bfd_hash_entry *entry; | |
58 | struct bfd_hash_table *table; | |
59 | const char *string; | |
60 | { | |
61 | struct coff_link_hash_entry *ret = (struct coff_link_hash_entry *) entry; | |
62 | ||
63 | /* Allocate the structure if it has not already been allocated by a | |
64 | subclass. */ | |
65 | if (ret == (struct coff_link_hash_entry *) NULL) | |
66 | ret = ((struct coff_link_hash_entry *) | |
67 | bfd_hash_allocate (table, sizeof (struct coff_link_hash_entry))); | |
68 | if (ret == (struct coff_link_hash_entry *) NULL) | |
69 | return (struct bfd_hash_entry *) ret; | |
70 | ||
71 | /* Call the allocation method of the superclass. */ | |
72 | ret = ((struct coff_link_hash_entry *) | |
73 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
74 | table, string)); | |
75 | if (ret != (struct coff_link_hash_entry *) NULL) | |
76 | { | |
77 | /* Set local fields. */ | |
78 | ret->indx = -1; | |
79 | ret->type = T_NULL; | |
80 | ret->class = C_NULL; | |
81 | ret->numaux = 0; | |
82 | ret->auxbfd = NULL; | |
83 | ret->aux = NULL; | |
84 | } | |
85 | ||
86 | return (struct bfd_hash_entry *) ret; | |
87 | } | |
88 | ||
89 | /* Initialize a COFF linker hash table. */ | |
90 | ||
91 | boolean | |
92 | _bfd_coff_link_hash_table_init (table, abfd, newfunc) | |
93 | struct coff_link_hash_table *table; | |
94 | bfd *abfd; | |
95 | struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, | |
96 | struct bfd_hash_table *, | |
97 | const char *)); | |
98 | { | |
99 | table->stab_info = NULL; | |
100 | return _bfd_link_hash_table_init (&table->root, abfd, newfunc); | |
101 | } | |
102 | ||
103 | /* Create a COFF linker hash table. */ | |
104 | ||
105 | struct bfd_link_hash_table * | |
106 | _bfd_coff_link_hash_table_create (abfd) | |
107 | bfd *abfd; | |
108 | { | |
109 | struct coff_link_hash_table *ret; | |
110 | ||
111 | ret = ((struct coff_link_hash_table *) | |
112 | bfd_alloc (abfd, sizeof (struct coff_link_hash_table))); | |
113 | if (ret == NULL) | |
114 | return NULL; | |
115 | if (! _bfd_coff_link_hash_table_init (ret, abfd, | |
116 | _bfd_coff_link_hash_newfunc)) | |
117 | { | |
118 | bfd_release (abfd, ret); | |
119 | return (struct bfd_link_hash_table *) NULL; | |
120 | } | |
121 | return &ret->root; | |
122 | } | |
123 | ||
124 | /* Create an entry in a COFF debug merge hash table. */ | |
125 | ||
126 | struct bfd_hash_entry * | |
127 | _bfd_coff_debug_merge_hash_newfunc (entry, table, string) | |
128 | struct bfd_hash_entry *entry; | |
129 | struct bfd_hash_table *table; | |
130 | const char *string; | |
131 | { | |
132 | struct coff_debug_merge_hash_entry *ret = | |
133 | (struct coff_debug_merge_hash_entry *) entry; | |
134 | ||
135 | /* Allocate the structure if it has not already been allocated by a | |
136 | subclass. */ | |
137 | if (ret == (struct coff_debug_merge_hash_entry *) NULL) | |
138 | ret = ((struct coff_debug_merge_hash_entry *) | |
139 | bfd_hash_allocate (table, | |
140 | sizeof (struct coff_debug_merge_hash_entry))); | |
141 | if (ret == (struct coff_debug_merge_hash_entry *) NULL) | |
142 | return (struct bfd_hash_entry *) ret; | |
143 | ||
144 | /* Call the allocation method of the superclass. */ | |
145 | ret = ((struct coff_debug_merge_hash_entry *) | |
146 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); | |
147 | if (ret != (struct coff_debug_merge_hash_entry *) NULL) | |
148 | { | |
149 | /* Set local fields. */ | |
150 | ret->types = NULL; | |
151 | } | |
152 | ||
153 | return (struct bfd_hash_entry *) ret; | |
154 | } | |
155 | ||
156 | /* Given a COFF BFD, add symbols to the global hash table as | |
157 | appropriate. */ | |
158 | ||
159 | boolean | |
160 | _bfd_coff_link_add_symbols (abfd, info) | |
161 | bfd *abfd; | |
162 | struct bfd_link_info *info; | |
163 | { | |
164 | switch (bfd_get_format (abfd)) | |
165 | { | |
166 | case bfd_object: | |
167 | return coff_link_add_object_symbols (abfd, info); | |
168 | case bfd_archive: | |
169 | return (_bfd_generic_link_add_archive_symbols | |
170 | (abfd, info, coff_link_check_archive_element)); | |
171 | default: | |
172 | bfd_set_error (bfd_error_wrong_format); | |
173 | return false; | |
174 | } | |
175 | } | |
176 | ||
177 | /* Add symbols from a COFF object file. */ | |
178 | ||
179 | static boolean | |
180 | coff_link_add_object_symbols (abfd, info) | |
181 | bfd *abfd; | |
182 | struct bfd_link_info *info; | |
183 | { | |
184 | if (! _bfd_coff_get_external_symbols (abfd)) | |
185 | return false; | |
186 | if (! coff_link_add_symbols (abfd, info)) | |
187 | return false; | |
188 | ||
189 | if (! info->keep_memory) | |
190 | { | |
191 | if (! _bfd_coff_free_symbols (abfd)) | |
192 | return false; | |
193 | } | |
194 | return true; | |
195 | } | |
196 | ||
197 | /* Check a single archive element to see if we need to include it in | |
198 | the link. *PNEEDED is set according to whether this element is | |
199 | needed in the link or not. This is called via | |
200 | _bfd_generic_link_add_archive_symbols. */ | |
201 | ||
202 | static boolean | |
203 | coff_link_check_archive_element (abfd, info, pneeded) | |
204 | bfd *abfd; | |
205 | struct bfd_link_info *info; | |
206 | boolean *pneeded; | |
207 | { | |
208 | if (! _bfd_coff_get_external_symbols (abfd)) | |
209 | return false; | |
210 | ||
211 | if (! coff_link_check_ar_symbols (abfd, info, pneeded)) | |
212 | return false; | |
213 | ||
214 | if (*pneeded) | |
215 | { | |
216 | if (! coff_link_add_symbols (abfd, info)) | |
217 | return false; | |
218 | } | |
219 | ||
220 | if (! info->keep_memory || ! *pneeded) | |
221 | { | |
222 | if (! _bfd_coff_free_symbols (abfd)) | |
223 | return false; | |
224 | } | |
225 | ||
226 | return true; | |
227 | } | |
228 | ||
229 | /* Look through the symbols to see if this object file should be | |
230 | included in the link. */ | |
231 | ||
232 | static boolean | |
233 | coff_link_check_ar_symbols (abfd, info, pneeded) | |
234 | bfd *abfd; | |
235 | struct bfd_link_info *info; | |
236 | boolean *pneeded; | |
237 | { | |
252b5132 RH |
238 | bfd_size_type symesz; |
239 | bfd_byte *esym; | |
240 | bfd_byte *esym_end; | |
241 | ||
242 | *pneeded = false; | |
243 | ||
252b5132 RH |
244 | symesz = bfd_coff_symesz (abfd); |
245 | esym = (bfd_byte *) obj_coff_external_syms (abfd); | |
246 | esym_end = esym + obj_raw_syment_count (abfd) * symesz; | |
247 | while (esym < esym_end) | |
248 | { | |
249 | struct internal_syment sym; | |
5d54c628 | 250 | enum coff_symbol_classification classification; |
252b5132 RH |
251 | |
252 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); | |
253 | ||
5d54c628 ILT |
254 | classification = bfd_coff_classify_symbol (abfd, &sym); |
255 | if (classification == COFF_SYMBOL_GLOBAL | |
256 | || classification == COFF_SYMBOL_COMMON) | |
252b5132 RH |
257 | { |
258 | const char *name; | |
259 | char buf[SYMNMLEN + 1]; | |
260 | struct bfd_link_hash_entry *h; | |
261 | ||
262 | /* This symbol is externally visible, and is defined by this | |
263 | object file. */ | |
264 | ||
265 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); | |
266 | if (name == NULL) | |
267 | return false; | |
268 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); | |
269 | ||
270 | /* We are only interested in symbols that are currently | |
271 | undefined. If a symbol is currently known to be common, | |
272 | COFF linkers do not bring in an object file which defines | |
273 | it. */ | |
274 | if (h != (struct bfd_link_hash_entry *) NULL | |
275 | && h->type == bfd_link_hash_undefined) | |
276 | { | |
277 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) | |
278 | return false; | |
279 | *pneeded = true; | |
280 | return true; | |
281 | } | |
282 | } | |
283 | ||
284 | esym += (sym.n_numaux + 1) * symesz; | |
285 | } | |
286 | ||
287 | /* We do not need this object file. */ | |
288 | return true; | |
289 | } | |
290 | ||
291 | /* Add all the symbols from an object file to the hash table. */ | |
292 | ||
293 | static boolean | |
294 | coff_link_add_symbols (abfd, info) | |
295 | bfd *abfd; | |
296 | struct bfd_link_info *info; | |
297 | { | |
b2d638c7 ILT |
298 | #if 0 |
299 | /* These aren't needed yet. */ | |
300 | unsigned int n_tmask = coff_data (abfd)->local_n_tmask; | |
301 | unsigned int n_btshft = coff_data (abfd)->local_n_btshft; | |
302 | unsigned int n_btmask = coff_data (abfd)->local_n_btmask; | |
303 | #endif | |
252b5132 RH |
304 | boolean keep_syms; |
305 | boolean default_copy; | |
306 | bfd_size_type symcount; | |
307 | struct coff_link_hash_entry **sym_hash; | |
308 | bfd_size_type symesz; | |
309 | bfd_byte *esym; | |
310 | bfd_byte *esym_end; | |
311 | ||
312 | /* Keep the symbols during this function, in case the linker needs | |
313 | to read the generic symbols in order to report an error message. */ | |
314 | keep_syms = obj_coff_keep_syms (abfd); | |
315 | obj_coff_keep_syms (abfd) = true; | |
316 | ||
252b5132 RH |
317 | if (info->keep_memory) |
318 | default_copy = false; | |
319 | else | |
320 | default_copy = true; | |
321 | ||
322 | symcount = obj_raw_syment_count (abfd); | |
323 | ||
324 | /* We keep a list of the linker hash table entries that correspond | |
325 | to particular symbols. */ | |
326 | sym_hash = ((struct coff_link_hash_entry **) | |
327 | bfd_alloc (abfd, | |
328 | ((size_t) symcount | |
329 | * sizeof (struct coff_link_hash_entry *)))); | |
330 | if (sym_hash == NULL && symcount != 0) | |
331 | goto error_return; | |
332 | obj_coff_sym_hashes (abfd) = sym_hash; | |
333 | memset (sym_hash, 0, | |
334 | (size_t) symcount * sizeof (struct coff_link_hash_entry *)); | |
335 | ||
336 | symesz = bfd_coff_symesz (abfd); | |
337 | BFD_ASSERT (symesz == bfd_coff_auxesz (abfd)); | |
338 | esym = (bfd_byte *) obj_coff_external_syms (abfd); | |
339 | esym_end = esym + symcount * symesz; | |
340 | while (esym < esym_end) | |
341 | { | |
342 | struct internal_syment sym; | |
5d54c628 | 343 | enum coff_symbol_classification classification; |
252b5132 RH |
344 | boolean copy; |
345 | ||
346 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); | |
347 | ||
5d54c628 ILT |
348 | classification = bfd_coff_classify_symbol (abfd, &sym); |
349 | if (classification != COFF_SYMBOL_LOCAL) | |
252b5132 RH |
350 | { |
351 | const char *name; | |
352 | char buf[SYMNMLEN + 1]; | |
353 | flagword flags; | |
354 | asection *section; | |
355 | bfd_vma value; | |
7fd9c191 | 356 | boolean addit; |
252b5132 RH |
357 | |
358 | /* This symbol is externally visible. */ | |
359 | ||
360 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); | |
361 | if (name == NULL) | |
362 | goto error_return; | |
363 | ||
364 | /* We must copy the name into memory if we got it from the | |
365 | syment itself, rather than the string table. */ | |
366 | copy = default_copy; | |
367 | if (sym._n._n_n._n_zeroes != 0 | |
368 | || sym._n._n_n._n_offset == 0) | |
369 | copy = true; | |
370 | ||
371 | value = sym.n_value; | |
372 | ||
5d54c628 | 373 | switch (classification) |
252b5132 | 374 | { |
5d54c628 ILT |
375 | default: |
376 | abort (); | |
377 | ||
378 | case COFF_SYMBOL_GLOBAL: | |
252b5132 RH |
379 | flags = BSF_EXPORT | BSF_GLOBAL; |
380 | section = coff_section_from_bfd_index (abfd, sym.n_scnum); | |
381 | if (! obj_pe (abfd)) | |
382 | value -= section->vma; | |
5d54c628 ILT |
383 | break; |
384 | ||
385 | case COFF_SYMBOL_UNDEFINED: | |
386 | flags = 0; | |
387 | section = bfd_und_section_ptr; | |
388 | break; | |
389 | ||
390 | case COFF_SYMBOL_COMMON: | |
391 | flags = BSF_GLOBAL; | |
392 | section = bfd_com_section_ptr; | |
393 | break; | |
394 | ||
395 | case COFF_SYMBOL_PE_SECTION: | |
396 | flags = BSF_SECTION_SYM | BSF_GLOBAL; | |
397 | section = coff_section_from_bfd_index (abfd, sym.n_scnum); | |
398 | break; | |
252b5132 RH |
399 | } |
400 | ||
401 | if (sym.n_sclass == C_WEAKEXT | |
402 | || (obj_pe (abfd) && sym.n_sclass == C_NT_WEAK)) | |
403 | flags = BSF_WEAK; | |
404 | ||
7fd9c191 ILT |
405 | addit = true; |
406 | ||
407 | /* In the PE format, section symbols actually refer to the | |
408 | start of the output section. We handle them specially | |
409 | here. */ | |
410 | if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0) | |
411 | { | |
412 | *sym_hash = coff_link_hash_lookup (coff_hash_table (info), | |
413 | name, false, copy, false); | |
414 | if (*sym_hash != NULL) | |
415 | { | |
416 | if (((*sym_hash)->coff_link_hash_flags | |
417 | & COFF_LINK_HASH_PE_SECTION_SYMBOL) == 0 | |
418 | && (*sym_hash)->root.type != bfd_link_hash_undefined | |
419 | && (*sym_hash)->root.type != bfd_link_hash_undefweak) | |
420 | (*_bfd_error_handler) | |
421 | ("Warning: symbol `%s' is both section and non-section", | |
422 | name); | |
423 | ||
424 | addit = false; | |
425 | } | |
426 | } | |
427 | ||
428 | if (addit) | |
429 | { | |
430 | if (! (bfd_coff_link_add_one_symbol | |
431 | (info, abfd, name, flags, section, value, | |
432 | (const char *) NULL, copy, false, | |
433 | (struct bfd_link_hash_entry **) sym_hash))) | |
434 | goto error_return; | |
435 | } | |
436 | ||
437 | if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0) | |
438 | (*sym_hash)->coff_link_hash_flags |= | |
439 | COFF_LINK_HASH_PE_SECTION_SYMBOL; | |
252b5132 RH |
440 | |
441 | if (section == bfd_com_section_ptr | |
442 | && (*sym_hash)->root.type == bfd_link_hash_common | |
443 | && ((*sym_hash)->root.u.c.p->alignment_power | |
444 | > bfd_coff_default_section_alignment_power (abfd))) | |
445 | (*sym_hash)->root.u.c.p->alignment_power | |
446 | = bfd_coff_default_section_alignment_power (abfd); | |
447 | ||
448 | if (info->hash->creator->flavour == bfd_get_flavour (abfd)) | |
449 | { | |
450 | if (((*sym_hash)->class == C_NULL | |
451 | && (*sym_hash)->type == T_NULL) | |
452 | || sym.n_scnum != 0 | |
453 | || (sym.n_value != 0 | |
454 | && (*sym_hash)->root.type != bfd_link_hash_defined | |
455 | && (*sym_hash)->root.type != bfd_link_hash_defweak)) | |
456 | { | |
457 | (*sym_hash)->class = sym.n_sclass; | |
458 | if (sym.n_type != T_NULL) | |
459 | { | |
460 | if ((*sym_hash)->type != T_NULL | |
461 | && (*sym_hash)->type != sym.n_type) | |
462 | (*_bfd_error_handler) | |
463 | (_("Warning: type of symbol `%s' changed from %d to %d in %s"), | |
464 | name, (*sym_hash)->type, sym.n_type, | |
465 | bfd_get_filename (abfd)); | |
466 | (*sym_hash)->type = sym.n_type; | |
467 | } | |
468 | (*sym_hash)->auxbfd = abfd; | |
469 | if (sym.n_numaux != 0) | |
470 | { | |
471 | union internal_auxent *alloc; | |
472 | unsigned int i; | |
473 | bfd_byte *eaux; | |
474 | union internal_auxent *iaux; | |
475 | ||
476 | (*sym_hash)->numaux = sym.n_numaux; | |
477 | alloc = ((union internal_auxent *) | |
478 | bfd_hash_allocate (&info->hash->table, | |
479 | (sym.n_numaux | |
480 | * sizeof (*alloc)))); | |
481 | if (alloc == NULL) | |
482 | goto error_return; | |
483 | for (i = 0, eaux = esym + symesz, iaux = alloc; | |
484 | i < sym.n_numaux; | |
485 | i++, eaux += symesz, iaux++) | |
486 | bfd_coff_swap_aux_in (abfd, (PTR) eaux, sym.n_type, | |
487 | sym.n_sclass, i, sym.n_numaux, | |
488 | (PTR) iaux); | |
489 | (*sym_hash)->aux = alloc; | |
490 | } | |
491 | } | |
492 | } | |
5d54c628 ILT |
493 | |
494 | if (classification == COFF_SYMBOL_PE_SECTION | |
495 | && (*sym_hash)->numaux != 0) | |
496 | { | |
497 | /* Some PE sections (such as .bss) have a zero size in | |
498 | the section header, but a non-zero size in the AUX | |
499 | record. Correct that here. | |
500 | ||
501 | FIXME: This is not at all the right place to do this. | |
502 | For example, it won't help objdump. This needs to be | |
503 | done when we swap in the section header. */ | |
504 | ||
505 | BFD_ASSERT ((*sym_hash)->numaux == 1); | |
506 | if (section->_raw_size == 0) | |
507 | section->_raw_size = (*sym_hash)->aux[0].x_scn.x_scnlen; | |
508 | ||
509 | /* FIXME: We could test whether the section sizes | |
510 | matches the size in the aux entry, but apparently | |
511 | that sometimes fails unexpectedly. */ | |
512 | } | |
252b5132 RH |
513 | } |
514 | ||
515 | esym += (sym.n_numaux + 1) * symesz; | |
516 | sym_hash += sym.n_numaux + 1; | |
517 | } | |
518 | ||
519 | /* If this is a non-traditional, non-relocateable link, try to | |
520 | optimize the handling of any .stab/.stabstr sections. */ | |
521 | if (! info->relocateable | |
522 | && ! info->traditional_format | |
523 | && info->hash->creator->flavour == bfd_get_flavour (abfd) | |
524 | && (info->strip != strip_all && info->strip != strip_debugger)) | |
525 | { | |
526 | asection *stab, *stabstr; | |
527 | ||
528 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
529 | if (stab != NULL) | |
530 | { | |
531 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
532 | ||
533 | if (stabstr != NULL) | |
534 | { | |
535 | struct coff_link_hash_table *table; | |
536 | struct coff_section_tdata *secdata; | |
537 | ||
538 | secdata = coff_section_data (abfd, stab); | |
539 | if (secdata == NULL) | |
540 | { | |
541 | stab->used_by_bfd = | |
542 | (PTR) bfd_zalloc (abfd, | |
543 | sizeof (struct coff_section_tdata)); | |
544 | if (stab->used_by_bfd == NULL) | |
545 | goto error_return; | |
546 | secdata = coff_section_data (abfd, stab); | |
547 | } | |
548 | ||
549 | table = coff_hash_table (info); | |
550 | ||
551 | if (! _bfd_link_section_stabs (abfd, &table->stab_info, | |
552 | stab, stabstr, | |
553 | &secdata->stab_info)) | |
554 | goto error_return; | |
555 | } | |
556 | } | |
557 | } | |
558 | ||
559 | obj_coff_keep_syms (abfd) = keep_syms; | |
560 | ||
561 | return true; | |
562 | ||
563 | error_return: | |
564 | obj_coff_keep_syms (abfd) = keep_syms; | |
565 | return false; | |
566 | } | |
567 | \f | |
568 | /* Do the final link step. */ | |
569 | ||
570 | boolean | |
571 | _bfd_coff_final_link (abfd, info) | |
572 | bfd *abfd; | |
573 | struct bfd_link_info *info; | |
574 | { | |
575 | bfd_size_type symesz; | |
576 | struct coff_final_link_info finfo; | |
577 | boolean debug_merge_allocated; | |
578 | boolean long_section_names; | |
579 | asection *o; | |
580 | struct bfd_link_order *p; | |
581 | size_t max_sym_count; | |
582 | size_t max_lineno_count; | |
583 | size_t max_reloc_count; | |
584 | size_t max_output_reloc_count; | |
585 | size_t max_contents_size; | |
586 | file_ptr rel_filepos; | |
587 | unsigned int relsz; | |
588 | file_ptr line_filepos; | |
589 | unsigned int linesz; | |
590 | bfd *sub; | |
591 | bfd_byte *external_relocs = NULL; | |
592 | char strbuf[STRING_SIZE_SIZE]; | |
593 | ||
594 | symesz = bfd_coff_symesz (abfd); | |
595 | ||
596 | finfo.info = info; | |
597 | finfo.output_bfd = abfd; | |
598 | finfo.strtab = NULL; | |
599 | finfo.section_info = NULL; | |
600 | finfo.last_file_index = -1; | |
601 | finfo.last_bf_index = -1; | |
602 | finfo.internal_syms = NULL; | |
603 | finfo.sec_ptrs = NULL; | |
604 | finfo.sym_indices = NULL; | |
605 | finfo.outsyms = NULL; | |
606 | finfo.linenos = NULL; | |
607 | finfo.contents = NULL; | |
608 | finfo.external_relocs = NULL; | |
609 | finfo.internal_relocs = NULL; | |
610 | finfo.global_to_static = false; | |
611 | debug_merge_allocated = false; | |
612 | ||
613 | coff_data (abfd)->link_info = info; | |
614 | ||
615 | finfo.strtab = _bfd_stringtab_init (); | |
616 | if (finfo.strtab == NULL) | |
617 | goto error_return; | |
618 | ||
619 | if (! coff_debug_merge_hash_table_init (&finfo.debug_merge)) | |
620 | goto error_return; | |
621 | debug_merge_allocated = true; | |
622 | ||
623 | /* Compute the file positions for all the sections. */ | |
624 | if (! abfd->output_has_begun) | |
625 | { | |
626 | if (! bfd_coff_compute_section_file_positions (abfd)) | |
627 | goto error_return; | |
628 | } | |
629 | ||
630 | /* Count the line numbers and relocation entries required for the | |
631 | output file. Set the file positions for the relocs. */ | |
632 | rel_filepos = obj_relocbase (abfd); | |
633 | relsz = bfd_coff_relsz (abfd); | |
634 | max_contents_size = 0; | |
635 | max_lineno_count = 0; | |
636 | max_reloc_count = 0; | |
637 | ||
638 | long_section_names = false; | |
639 | for (o = abfd->sections; o != NULL; o = o->next) | |
640 | { | |
641 | o->reloc_count = 0; | |
642 | o->lineno_count = 0; | |
643 | for (p = o->link_order_head; p != NULL; p = p->next) | |
644 | { | |
645 | if (p->type == bfd_indirect_link_order) | |
646 | { | |
647 | asection *sec; | |
648 | ||
649 | sec = p->u.indirect.section; | |
650 | ||
651 | /* Mark all sections which are to be included in the | |
652 | link. This will normally be every section. We need | |
653 | to do this so that we can identify any sections which | |
654 | the linker has decided to not include. */ | |
655 | sec->linker_mark = true; | |
656 | ||
657 | if (info->strip == strip_none | |
658 | || info->strip == strip_some) | |
659 | o->lineno_count += sec->lineno_count; | |
660 | ||
661 | if (info->relocateable) | |
662 | o->reloc_count += sec->reloc_count; | |
663 | ||
664 | if (sec->_raw_size > max_contents_size) | |
665 | max_contents_size = sec->_raw_size; | |
666 | if (sec->lineno_count > max_lineno_count) | |
667 | max_lineno_count = sec->lineno_count; | |
668 | if (sec->reloc_count > max_reloc_count) | |
669 | max_reloc_count = sec->reloc_count; | |
670 | } | |
671 | else if (info->relocateable | |
672 | && (p->type == bfd_section_reloc_link_order | |
673 | || p->type == bfd_symbol_reloc_link_order)) | |
674 | ++o->reloc_count; | |
675 | } | |
676 | if (o->reloc_count == 0) | |
677 | o->rel_filepos = 0; | |
678 | else | |
679 | { | |
680 | o->flags |= SEC_RELOC; | |
681 | o->rel_filepos = rel_filepos; | |
682 | rel_filepos += o->reloc_count * relsz; | |
683 | } | |
684 | ||
685 | if (bfd_coff_long_section_names (abfd) | |
686 | && strlen (o->name) > SCNNMLEN) | |
687 | { | |
688 | /* This section has a long name which must go in the string | |
689 | table. This must correspond to the code in | |
690 | coff_write_object_contents which puts the string index | |
691 | into the s_name field of the section header. That is why | |
692 | we pass hash as false. */ | |
693 | if (_bfd_stringtab_add (finfo.strtab, o->name, false, false) | |
694 | == (bfd_size_type) -1) | |
695 | goto error_return; | |
696 | long_section_names = true; | |
697 | } | |
698 | } | |
699 | ||
700 | /* If doing a relocateable link, allocate space for the pointers we | |
701 | need to keep. */ | |
702 | if (info->relocateable) | |
703 | { | |
704 | unsigned int i; | |
705 | ||
706 | /* We use section_count + 1, rather than section_count, because | |
707 | the target_index fields are 1 based. */ | |
708 | finfo.section_info = | |
709 | ((struct coff_link_section_info *) | |
710 | bfd_malloc ((abfd->section_count + 1) | |
711 | * sizeof (struct coff_link_section_info))); | |
712 | if (finfo.section_info == NULL) | |
713 | goto error_return; | |
714 | for (i = 0; i <= abfd->section_count; i++) | |
715 | { | |
716 | finfo.section_info[i].relocs = NULL; | |
717 | finfo.section_info[i].rel_hashes = NULL; | |
718 | } | |
719 | } | |
720 | ||
721 | /* We now know the size of the relocs, so we can determine the file | |
722 | positions of the line numbers. */ | |
723 | line_filepos = rel_filepos; | |
724 | linesz = bfd_coff_linesz (abfd); | |
725 | max_output_reloc_count = 0; | |
726 | for (o = abfd->sections; o != NULL; o = o->next) | |
727 | { | |
728 | if (o->lineno_count == 0) | |
729 | o->line_filepos = 0; | |
730 | else | |
731 | { | |
732 | o->line_filepos = line_filepos; | |
733 | line_filepos += o->lineno_count * linesz; | |
734 | } | |
735 | ||
736 | if (o->reloc_count != 0) | |
737 | { | |
738 | /* We don't know the indices of global symbols until we have | |
739 | written out all the local symbols. For each section in | |
740 | the output file, we keep an array of pointers to hash | |
741 | table entries. Each entry in the array corresponds to a | |
742 | reloc. When we find a reloc against a global symbol, we | |
743 | set the corresponding entry in this array so that we can | |
744 | fix up the symbol index after we have written out all the | |
745 | local symbols. | |
746 | ||
747 | Because of this problem, we also keep the relocs in | |
748 | memory until the end of the link. This wastes memory, | |
749 | but only when doing a relocateable link, which is not the | |
750 | common case. */ | |
751 | BFD_ASSERT (info->relocateable); | |
752 | finfo.section_info[o->target_index].relocs = | |
753 | ((struct internal_reloc *) | |
754 | bfd_malloc (o->reloc_count * sizeof (struct internal_reloc))); | |
755 | finfo.section_info[o->target_index].rel_hashes = | |
756 | ((struct coff_link_hash_entry **) | |
757 | bfd_malloc (o->reloc_count | |
758 | * sizeof (struct coff_link_hash_entry *))); | |
759 | if (finfo.section_info[o->target_index].relocs == NULL | |
760 | || finfo.section_info[o->target_index].rel_hashes == NULL) | |
761 | goto error_return; | |
762 | ||
763 | if (o->reloc_count > max_output_reloc_count) | |
764 | max_output_reloc_count = o->reloc_count; | |
765 | } | |
766 | ||
767 | /* Reset the reloc and lineno counts, so that we can use them to | |
768 | count the number of entries we have output so far. */ | |
769 | o->reloc_count = 0; | |
770 | o->lineno_count = 0; | |
771 | } | |
772 | ||
773 | obj_sym_filepos (abfd) = line_filepos; | |
774 | ||
775 | /* Figure out the largest number of symbols in an input BFD. Take | |
776 | the opportunity to clear the output_has_begun fields of all the | |
777 | input BFD's. */ | |
778 | max_sym_count = 0; | |
779 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
780 | { | |
781 | size_t sz; | |
782 | ||
783 | sub->output_has_begun = false; | |
784 | sz = obj_raw_syment_count (sub); | |
785 | if (sz > max_sym_count) | |
786 | max_sym_count = sz; | |
787 | } | |
788 | ||
789 | /* Allocate some buffers used while linking. */ | |
790 | finfo.internal_syms = ((struct internal_syment *) | |
791 | bfd_malloc (max_sym_count | |
792 | * sizeof (struct internal_syment))); | |
793 | finfo.sec_ptrs = (asection **) bfd_malloc (max_sym_count | |
794 | * sizeof (asection *)); | |
795 | finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long)); | |
796 | finfo.outsyms = ((bfd_byte *) | |
797 | bfd_malloc ((size_t) ((max_sym_count + 1) * symesz))); | |
798 | finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count | |
799 | * bfd_coff_linesz (abfd)); | |
800 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); | |
801 | finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz); | |
802 | if (! info->relocateable) | |
803 | finfo.internal_relocs = ((struct internal_reloc *) | |
804 | bfd_malloc (max_reloc_count | |
805 | * sizeof (struct internal_reloc))); | |
806 | if ((finfo.internal_syms == NULL && max_sym_count > 0) | |
807 | || (finfo.sec_ptrs == NULL && max_sym_count > 0) | |
808 | || (finfo.sym_indices == NULL && max_sym_count > 0) | |
809 | || finfo.outsyms == NULL | |
810 | || (finfo.linenos == NULL && max_lineno_count > 0) | |
811 | || (finfo.contents == NULL && max_contents_size > 0) | |
812 | || (finfo.external_relocs == NULL && max_reloc_count > 0) | |
813 | || (! info->relocateable | |
814 | && finfo.internal_relocs == NULL | |
815 | && max_reloc_count > 0)) | |
816 | goto error_return; | |
817 | ||
818 | /* We now know the position of everything in the file, except that | |
819 | we don't know the size of the symbol table and therefore we don't | |
820 | know where the string table starts. We just build the string | |
821 | table in memory as we go along. We process all the relocations | |
822 | for a single input file at once. */ | |
823 | obj_raw_syment_count (abfd) = 0; | |
824 | ||
825 | if (coff_backend_info (abfd)->_bfd_coff_start_final_link) | |
826 | { | |
827 | if (! bfd_coff_start_final_link (abfd, info)) | |
828 | goto error_return; | |
829 | } | |
830 | ||
831 | for (o = abfd->sections; o != NULL; o = o->next) | |
832 | { | |
833 | for (p = o->link_order_head; p != NULL; p = p->next) | |
834 | { | |
835 | if (p->type == bfd_indirect_link_order | |
836 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
837 | == bfd_target_coff_flavour)) | |
838 | { | |
839 | sub = p->u.indirect.section->owner; | |
840 | if (! bfd_coff_link_output_has_begun (sub, & finfo)) | |
841 | { | |
842 | if (! _bfd_coff_link_input_bfd (&finfo, sub)) | |
843 | goto error_return; | |
844 | sub->output_has_begun = true; | |
845 | } | |
846 | } | |
847 | else if (p->type == bfd_section_reloc_link_order | |
848 | || p->type == bfd_symbol_reloc_link_order) | |
849 | { | |
850 | if (! _bfd_coff_reloc_link_order (abfd, &finfo, o, p)) | |
851 | goto error_return; | |
852 | } | |
853 | else | |
854 | { | |
855 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
856 | goto error_return; | |
857 | } | |
858 | } | |
859 | } | |
860 | ||
861 | if (! bfd_coff_final_link_postscript (abfd, & finfo)) | |
862 | goto error_return; | |
863 | ||
864 | /* Free up the buffers used by _bfd_coff_link_input_bfd. */ | |
865 | ||
866 | coff_debug_merge_hash_table_free (&finfo.debug_merge); | |
867 | debug_merge_allocated = false; | |
868 | ||
869 | if (finfo.internal_syms != NULL) | |
870 | { | |
871 | free (finfo.internal_syms); | |
872 | finfo.internal_syms = NULL; | |
873 | } | |
874 | if (finfo.sec_ptrs != NULL) | |
875 | { | |
876 | free (finfo.sec_ptrs); | |
877 | finfo.sec_ptrs = NULL; | |
878 | } | |
879 | if (finfo.sym_indices != NULL) | |
880 | { | |
881 | free (finfo.sym_indices); | |
882 | finfo.sym_indices = NULL; | |
883 | } | |
884 | if (finfo.linenos != NULL) | |
885 | { | |
886 | free (finfo.linenos); | |
887 | finfo.linenos = NULL; | |
888 | } | |
889 | if (finfo.contents != NULL) | |
890 | { | |
891 | free (finfo.contents); | |
892 | finfo.contents = NULL; | |
893 | } | |
894 | if (finfo.external_relocs != NULL) | |
895 | { | |
896 | free (finfo.external_relocs); | |
897 | finfo.external_relocs = NULL; | |
898 | } | |
899 | if (finfo.internal_relocs != NULL) | |
900 | { | |
901 | free (finfo.internal_relocs); | |
902 | finfo.internal_relocs = NULL; | |
903 | } | |
904 | ||
905 | /* The value of the last C_FILE symbol is supposed to be the symbol | |
906 | index of the first external symbol. Write it out again if | |
907 | necessary. */ | |
908 | if (finfo.last_file_index != -1 | |
909 | && (unsigned int) finfo.last_file.n_value != obj_raw_syment_count (abfd)) | |
910 | { | |
911 | finfo.last_file.n_value = obj_raw_syment_count (abfd); | |
912 | bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file, | |
913 | (PTR) finfo.outsyms); | |
914 | if (bfd_seek (abfd, | |
915 | (obj_sym_filepos (abfd) | |
916 | + finfo.last_file_index * symesz), | |
917 | SEEK_SET) != 0 | |
918 | || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz) | |
919 | return false; | |
920 | } | |
921 | ||
922 | /* If doing task linking (ld --task-link) then make a pass through the | |
923 | global symbols, writing out any that are defined, and making them | |
924 | static. */ | |
925 | if (info->task_link) | |
926 | { | |
927 | finfo.failed = false; | |
928 | coff_link_hash_traverse (coff_hash_table (info), _bfd_coff_write_task_globals, | |
929 | (PTR) &finfo); | |
930 | if (finfo.failed) | |
931 | goto error_return; | |
932 | } | |
933 | ||
934 | /* Write out the global symbols. */ | |
935 | finfo.failed = false; | |
936 | coff_link_hash_traverse (coff_hash_table (info), _bfd_coff_write_global_sym, | |
937 | (PTR) &finfo); | |
938 | if (finfo.failed) | |
939 | goto error_return; | |
940 | ||
941 | /* The outsyms buffer is used by _bfd_coff_write_global_sym. */ | |
942 | if (finfo.outsyms != NULL) | |
943 | { | |
944 | free (finfo.outsyms); | |
945 | finfo.outsyms = NULL; | |
946 | } | |
947 | ||
948 | if (info->relocateable && max_output_reloc_count > 0) | |
949 | { | |
950 | /* Now that we have written out all the global symbols, we know | |
951 | the symbol indices to use for relocs against them, and we can | |
952 | finally write out the relocs. */ | |
953 | external_relocs = ((bfd_byte *) | |
954 | bfd_malloc (max_output_reloc_count * relsz)); | |
955 | if (external_relocs == NULL) | |
956 | goto error_return; | |
957 | ||
958 | for (o = abfd->sections; o != NULL; o = o->next) | |
959 | { | |
960 | struct internal_reloc *irel; | |
961 | struct internal_reloc *irelend; | |
962 | struct coff_link_hash_entry **rel_hash; | |
963 | bfd_byte *erel; | |
964 | ||
965 | if (o->reloc_count == 0) | |
966 | continue; | |
967 | ||
968 | irel = finfo.section_info[o->target_index].relocs; | |
969 | irelend = irel + o->reloc_count; | |
970 | rel_hash = finfo.section_info[o->target_index].rel_hashes; | |
971 | erel = external_relocs; | |
972 | for (; irel < irelend; irel++, rel_hash++, erel += relsz) | |
973 | { | |
974 | if (*rel_hash != NULL) | |
975 | { | |
976 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
977 | irel->r_symndx = (*rel_hash)->indx; | |
978 | } | |
979 | bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel); | |
980 | } | |
981 | ||
982 | if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0 | |
983 | || bfd_write ((PTR) external_relocs, relsz, o->reloc_count, | |
984 | abfd) != relsz * o->reloc_count) | |
985 | goto error_return; | |
986 | } | |
987 | ||
988 | free (external_relocs); | |
989 | external_relocs = NULL; | |
990 | } | |
991 | ||
992 | /* Free up the section information. */ | |
993 | if (finfo.section_info != NULL) | |
994 | { | |
995 | unsigned int i; | |
996 | ||
997 | for (i = 0; i < abfd->section_count; i++) | |
998 | { | |
999 | if (finfo.section_info[i].relocs != NULL) | |
1000 | free (finfo.section_info[i].relocs); | |
1001 | if (finfo.section_info[i].rel_hashes != NULL) | |
1002 | free (finfo.section_info[i].rel_hashes); | |
1003 | } | |
1004 | free (finfo.section_info); | |
1005 | finfo.section_info = NULL; | |
1006 | } | |
1007 | ||
1008 | /* If we have optimized stabs strings, output them. */ | |
1009 | if (coff_hash_table (info)->stab_info != NULL) | |
1010 | { | |
1011 | if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info)) | |
1012 | return false; | |
1013 | } | |
1014 | ||
1015 | /* Write out the string table. */ | |
1016 | if (obj_raw_syment_count (abfd) != 0 || long_section_names) | |
1017 | { | |
1018 | if (bfd_seek (abfd, | |
1019 | (obj_sym_filepos (abfd) | |
1020 | + obj_raw_syment_count (abfd) * symesz), | |
1021 | SEEK_SET) != 0) | |
1022 | return false; | |
1023 | ||
1024 | #if STRING_SIZE_SIZE == 4 | |
1025 | bfd_h_put_32 (abfd, | |
1026 | _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE, | |
1027 | (bfd_byte *) strbuf); | |
1028 | #else | |
1029 | #error Change bfd_h_put_32 | |
1030 | #endif | |
1031 | ||
1032 | if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE) | |
1033 | return false; | |
1034 | ||
1035 | if (! _bfd_stringtab_emit (abfd, finfo.strtab)) | |
1036 | return false; | |
1037 | } | |
1038 | ||
1039 | _bfd_stringtab_free (finfo.strtab); | |
1040 | ||
1041 | /* Setting bfd_get_symcount to 0 will cause write_object_contents to | |
1042 | not try to write out the symbols. */ | |
1043 | bfd_get_symcount (abfd) = 0; | |
1044 | ||
1045 | return true; | |
1046 | ||
1047 | error_return: | |
1048 | if (debug_merge_allocated) | |
1049 | coff_debug_merge_hash_table_free (&finfo.debug_merge); | |
1050 | if (finfo.strtab != NULL) | |
1051 | _bfd_stringtab_free (finfo.strtab); | |
1052 | if (finfo.section_info != NULL) | |
1053 | { | |
1054 | unsigned int i; | |
1055 | ||
1056 | for (i = 0; i < abfd->section_count; i++) | |
1057 | { | |
1058 | if (finfo.section_info[i].relocs != NULL) | |
1059 | free (finfo.section_info[i].relocs); | |
1060 | if (finfo.section_info[i].rel_hashes != NULL) | |
1061 | free (finfo.section_info[i].rel_hashes); | |
1062 | } | |
1063 | free (finfo.section_info); | |
1064 | } | |
1065 | if (finfo.internal_syms != NULL) | |
1066 | free (finfo.internal_syms); | |
1067 | if (finfo.sec_ptrs != NULL) | |
1068 | free (finfo.sec_ptrs); | |
1069 | if (finfo.sym_indices != NULL) | |
1070 | free (finfo.sym_indices); | |
1071 | if (finfo.outsyms != NULL) | |
1072 | free (finfo.outsyms); | |
1073 | if (finfo.linenos != NULL) | |
1074 | free (finfo.linenos); | |
1075 | if (finfo.contents != NULL) | |
1076 | free (finfo.contents); | |
1077 | if (finfo.external_relocs != NULL) | |
1078 | free (finfo.external_relocs); | |
1079 | if (finfo.internal_relocs != NULL) | |
1080 | free (finfo.internal_relocs); | |
1081 | if (external_relocs != NULL) | |
1082 | free (external_relocs); | |
1083 | return false; | |
1084 | } | |
1085 | ||
1086 | /* parse out a -heap <reserved>,<commit> line */ | |
1087 | ||
1088 | static char * | |
1089 | dores_com (ptr, output_bfd, heap) | |
1090 | char *ptr; | |
1091 | bfd *output_bfd; | |
1092 | int heap; | |
1093 | { | |
1094 | if (coff_data(output_bfd)->pe) | |
1095 | { | |
1096 | int val = strtoul (ptr, &ptr, 0); | |
1097 | if (heap) | |
1098 | pe_data(output_bfd)->pe_opthdr.SizeOfHeapReserve =val; | |
1099 | else | |
1100 | pe_data(output_bfd)->pe_opthdr.SizeOfStackReserve =val; | |
1101 | ||
1102 | if (ptr[0] == ',') | |
1103 | { | |
1104 | int val = strtoul (ptr+1, &ptr, 0); | |
1105 | if (heap) | |
1106 | pe_data(output_bfd)->pe_opthdr.SizeOfHeapCommit =val; | |
1107 | else | |
1108 | pe_data(output_bfd)->pe_opthdr.SizeOfStackCommit =val; | |
1109 | } | |
1110 | } | |
1111 | return ptr; | |
1112 | } | |
1113 | ||
1114 | static char *get_name(ptr, dst) | |
1115 | char *ptr; | |
1116 | char **dst; | |
1117 | { | |
1118 | while (*ptr == ' ') | |
1119 | ptr++; | |
1120 | *dst = ptr; | |
1121 | while (*ptr && *ptr != ' ') | |
1122 | ptr++; | |
1123 | *ptr = 0; | |
1124 | return ptr+1; | |
1125 | } | |
1126 | ||
1127 | /* Process any magic embedded commands in a section called .drectve */ | |
1128 | ||
1129 | static int | |
1130 | process_embedded_commands (output_bfd, info, abfd) | |
1131 | bfd *output_bfd; | |
5f771d47 | 1132 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1133 | bfd *abfd; |
1134 | { | |
1135 | asection *sec = bfd_get_section_by_name (abfd, ".drectve"); | |
1136 | char *s; | |
1137 | char *e; | |
1138 | char *copy; | |
1139 | if (!sec) | |
1140 | return 1; | |
1141 | ||
1142 | copy = bfd_malloc ((size_t) sec->_raw_size); | |
1143 | if (!copy) | |
1144 | return 0; | |
1145 | if (! bfd_get_section_contents(abfd, sec, copy, 0, sec->_raw_size)) | |
1146 | { | |
1147 | free (copy); | |
1148 | return 0; | |
1149 | } | |
1150 | e = copy + sec->_raw_size; | |
1151 | for (s = copy; s < e ; ) | |
1152 | { | |
1153 | if (s[0]!= '-') { | |
1154 | s++; | |
1155 | continue; | |
1156 | } | |
1157 | if (strncmp (s,"-attr", 5) == 0) | |
1158 | { | |
1159 | char *name; | |
1160 | char *attribs; | |
1161 | asection *asec; | |
1162 | ||
1163 | int loop = 1; | |
1164 | int had_write = 0; | |
1165 | int had_read = 0; | |
1166 | int had_exec= 0; | |
1167 | int had_shared= 0; | |
1168 | s += 5; | |
1169 | s = get_name(s, &name); | |
1170 | s = get_name(s, &attribs); | |
1171 | while (loop) { | |
1172 | switch (*attribs++) | |
1173 | { | |
1174 | case 'W': | |
1175 | had_write = 1; | |
1176 | break; | |
1177 | case 'R': | |
1178 | had_read = 1; | |
1179 | break; | |
1180 | case 'S': | |
1181 | had_shared = 1; | |
1182 | break; | |
1183 | case 'X': | |
1184 | had_exec = 1; | |
1185 | break; | |
1186 | default: | |
1187 | loop = 0; | |
1188 | } | |
1189 | } | |
1190 | asec = bfd_get_section_by_name (abfd, name); | |
1191 | if (asec) { | |
1192 | if (had_exec) | |
1193 | asec->flags |= SEC_CODE; | |
1194 | if (!had_write) | |
1195 | asec->flags |= SEC_READONLY; | |
1196 | } | |
1197 | } | |
1198 | else if (strncmp (s,"-heap", 5) == 0) | |
1199 | { | |
1200 | s = dores_com (s+5, output_bfd, 1); | |
1201 | } | |
1202 | else if (strncmp (s,"-stack", 6) == 0) | |
1203 | { | |
1204 | s = dores_com (s+6, output_bfd, 0); | |
1205 | } | |
1206 | else | |
1207 | s++; | |
1208 | } | |
1209 | free (copy); | |
1210 | return 1; | |
1211 | } | |
1212 | ||
1213 | /* Place a marker against all symbols which are used by relocations. | |
1214 | This marker can be picked up by the 'do we skip this symbol ?' | |
1215 | loop in _bfd_coff_link_input_bfd() and used to prevent skipping | |
1216 | that symbol. | |
1217 | */ | |
1218 | ||
1219 | static void | |
1220 | mark_relocs (finfo, input_bfd) | |
1221 | struct coff_final_link_info * finfo; | |
1222 | bfd * input_bfd; | |
1223 | { | |
1224 | asection * a; | |
1225 | ||
1226 | if ((bfd_get_file_flags (input_bfd) & HAS_SYMS) == 0) | |
1227 | return; | |
1228 | ||
1229 | for (a = input_bfd->sections; a != (asection *) NULL; a = a->next) | |
1230 | { | |
1231 | struct internal_reloc * internal_relocs; | |
1232 | struct internal_reloc * irel; | |
1233 | struct internal_reloc * irelend; | |
1234 | ||
1235 | ||
1236 | if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1) | |
1237 | continue; | |
1238 | ||
1239 | /* Read in the relocs. */ | |
1240 | internal_relocs = _bfd_coff_read_internal_relocs | |
1241 | (input_bfd, a, false, | |
1242 | finfo->external_relocs, | |
1243 | finfo->info->relocateable, | |
1244 | (finfo->info->relocateable | |
1245 | ? (finfo->section_info[ a->output_section->target_index ].relocs + a->output_section->reloc_count) | |
1246 | : finfo->internal_relocs) | |
1247 | ); | |
1248 | ||
1249 | if (internal_relocs == NULL) | |
1250 | continue; | |
1251 | ||
1252 | irel = internal_relocs; | |
1253 | irelend = irel + a->reloc_count; | |
1254 | ||
1255 | /* Place a mark in the sym_indices array (whose entries have | |
1256 | been initialised to 0) for all of the symbols that are used | |
1257 | in the relocation table. This will then be picked up in the | |
1258 | skip/don't pass */ | |
1259 | ||
1260 | for (; irel < irelend; irel++) | |
1261 | { | |
1262 | finfo->sym_indices[ irel->r_symndx ] = -1; | |
1263 | } | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | /* Link an input file into the linker output file. This function | |
1268 | handles all the sections and relocations of the input file at once. */ | |
1269 | ||
1270 | boolean | |
1271 | _bfd_coff_link_input_bfd (finfo, input_bfd) | |
1272 | struct coff_final_link_info *finfo; | |
1273 | bfd *input_bfd; | |
1274 | { | |
b2d638c7 ILT |
1275 | unsigned int n_tmask = coff_data (input_bfd)->local_n_tmask; |
1276 | unsigned int n_btshft = coff_data (input_bfd)->local_n_btshft; | |
1277 | #if 0 | |
1278 | unsigned int n_btmask = coff_data (input_bfd)->local_n_btmask; | |
1279 | #endif | |
252b5132 RH |
1280 | boolean (*adjust_symndx) PARAMS ((bfd *, struct bfd_link_info *, bfd *, |
1281 | asection *, struct internal_reloc *, | |
1282 | boolean *)); | |
1283 | bfd *output_bfd; | |
1284 | const char *strings; | |
1285 | bfd_size_type syment_base; | |
252b5132 RH |
1286 | boolean copy, hash; |
1287 | bfd_size_type isymesz; | |
1288 | bfd_size_type osymesz; | |
1289 | bfd_size_type linesz; | |
1290 | bfd_byte *esym; | |
1291 | bfd_byte *esym_end; | |
1292 | struct internal_syment *isymp; | |
1293 | asection **secpp; | |
1294 | long *indexp; | |
1295 | unsigned long output_index; | |
1296 | bfd_byte *outsym; | |
1297 | struct coff_link_hash_entry **sym_hash; | |
1298 | asection *o; | |
1299 | ||
1300 | /* Move all the symbols to the output file. */ | |
1301 | ||
1302 | output_bfd = finfo->output_bfd; | |
252b5132 RH |
1303 | strings = NULL; |
1304 | syment_base = obj_raw_syment_count (output_bfd); | |
1305 | isymesz = bfd_coff_symesz (input_bfd); | |
1306 | osymesz = bfd_coff_symesz (output_bfd); | |
1307 | linesz = bfd_coff_linesz (input_bfd); | |
1308 | BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd)); | |
1309 | ||
252b5132 RH |
1310 | copy = false; |
1311 | if (! finfo->info->keep_memory) | |
1312 | copy = true; | |
1313 | hash = true; | |
1314 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) | |
1315 | hash = false; | |
1316 | ||
1317 | if (! _bfd_coff_get_external_symbols (input_bfd)) | |
1318 | return false; | |
1319 | ||
1320 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); | |
1321 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; | |
1322 | isymp = finfo->internal_syms; | |
1323 | secpp = finfo->sec_ptrs; | |
1324 | indexp = finfo->sym_indices; | |
1325 | output_index = syment_base; | |
1326 | outsym = finfo->outsyms; | |
1327 | ||
1328 | if (coff_data (output_bfd)->pe) | |
1329 | { | |
1330 | if (! process_embedded_commands (output_bfd, finfo->info, input_bfd)) | |
1331 | return false; | |
1332 | } | |
1333 | ||
1334 | /* If we are going to perform relocations and also strip/discard some symbols | |
1335 | then we must make sure that we do not strip/discard those symbols that are | |
1336 | going to be involved in the relocations */ | |
1337 | if (( finfo->info->strip != strip_none | |
1338 | || finfo->info->discard != discard_none) | |
1339 | && finfo->info->relocateable) | |
1340 | { | |
1341 | /* mark the symbol array as 'not-used' */ | |
1342 | memset (indexp, 0, obj_raw_syment_count (input_bfd) * sizeof * indexp); | |
1343 | ||
1344 | mark_relocs (finfo, input_bfd); | |
1345 | } | |
1346 | ||
1347 | while (esym < esym_end) | |
1348 | { | |
1349 | struct internal_syment isym; | |
5d54c628 | 1350 | enum coff_symbol_classification classification; |
252b5132 RH |
1351 | boolean skip; |
1352 | boolean global; | |
1353 | boolean dont_skip_symbol; | |
1354 | int add; | |
1355 | ||
1356 | bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp); | |
1357 | ||
1358 | /* Make a copy of *isymp so that the relocate_section function | |
1359 | always sees the original values. This is more reliable than | |
1360 | always recomputing the symbol value even if we are stripping | |
1361 | the symbol. */ | |
1362 | isym = *isymp; | |
1363 | ||
5d54c628 ILT |
1364 | classification = bfd_coff_classify_symbol (input_bfd, &isym); |
1365 | switch (classification) | |
252b5132 | 1366 | { |
5d54c628 ILT |
1367 | default: |
1368 | abort (); | |
1369 | case COFF_SYMBOL_GLOBAL: | |
1370 | case COFF_SYMBOL_PE_SECTION: | |
1371 | case COFF_SYMBOL_LOCAL: | |
1372 | *secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum); | |
1373 | break; | |
1374 | case COFF_SYMBOL_COMMON: | |
1375 | *secpp = bfd_com_section_ptr; | |
1376 | break; | |
1377 | case COFF_SYMBOL_UNDEFINED: | |
1378 | *secpp = bfd_und_section_ptr; | |
1379 | break; | |
252b5132 RH |
1380 | } |
1381 | ||
1382 | /* Extract the flag indicating if this symbol is used by a | |
1383 | relocation. */ | |
1384 | if ((finfo->info->strip != strip_none | |
1385 | || finfo->info->discard != discard_none) | |
1386 | && finfo->info->relocateable) | |
1387 | dont_skip_symbol = *indexp; | |
1388 | else | |
1389 | dont_skip_symbol = false; | |
1390 | ||
1391 | *indexp = -1; | |
1392 | ||
1393 | skip = false; | |
1394 | global = false; | |
1395 | add = 1 + isym.n_numaux; | |
1396 | ||
1397 | /* If we are stripping all symbols, we want to skip this one. */ | |
1398 | if (finfo->info->strip == strip_all && ! dont_skip_symbol) | |
1399 | skip = true; | |
1400 | ||
1401 | if (! skip) | |
1402 | { | |
5d54c628 | 1403 | switch (classification) |
252b5132 | 1404 | { |
5d54c628 ILT |
1405 | default: |
1406 | abort (); | |
1407 | case COFF_SYMBOL_GLOBAL: | |
1408 | case COFF_SYMBOL_COMMON: | |
1409 | case COFF_SYMBOL_PE_SECTION: | |
252b5132 RH |
1410 | /* This is a global symbol. Global symbols come at the |
1411 | end of the symbol table, so skip them for now. | |
1412 | Locally defined function symbols, however, are an | |
1413 | exception, and are not moved to the end. */ | |
1414 | global = true; | |
5d54c628 | 1415 | if (! ISFCN (isym.n_type)) |
252b5132 | 1416 | skip = true; |
5d54c628 ILT |
1417 | break; |
1418 | ||
1419 | case COFF_SYMBOL_UNDEFINED: | |
1420 | /* Undefined symbols are left for the end. */ | |
1421 | global = true; | |
1422 | skip = true; | |
1423 | break; | |
1424 | ||
1425 | case COFF_SYMBOL_LOCAL: | |
252b5132 RH |
1426 | /* This is a local symbol. Skip it if we are discarding |
1427 | local symbols. */ | |
1428 | if (finfo->info->discard == discard_all && ! dont_skip_symbol) | |
1429 | skip = true; | |
5d54c628 | 1430 | break; |
252b5132 RH |
1431 | } |
1432 | } | |
1433 | ||
1434 | /* If we stripping debugging symbols, and this is a debugging | |
1435 | symbol, then skip it. FIXME: gas sets the section to N_ABS | |
1436 | for some types of debugging symbols; I don't know if this is | |
1437 | a bug or not. In any case, we handle it here. */ | |
1438 | if (! skip | |
1439 | && finfo->info->strip == strip_debugger | |
1440 | && ! dont_skip_symbol | |
1441 | && (isym.n_scnum == N_DEBUG | |
1442 | || (isym.n_scnum == N_ABS | |
1443 | && (isym.n_sclass == C_AUTO | |
1444 | || isym.n_sclass == C_REG | |
1445 | || isym.n_sclass == C_MOS | |
1446 | || isym.n_sclass == C_MOE | |
1447 | || isym.n_sclass == C_MOU | |
1448 | || isym.n_sclass == C_ARG | |
1449 | || isym.n_sclass == C_REGPARM | |
1450 | || isym.n_sclass == C_FIELD | |
1451 | || isym.n_sclass == C_EOS)))) | |
1452 | skip = true; | |
1453 | ||
1454 | /* If some symbols are stripped based on the name, work out the | |
1455 | name and decide whether to skip this symbol. */ | |
1456 | if (! skip | |
1457 | && (finfo->info->strip == strip_some | |
1458 | || finfo->info->discard == discard_l)) | |
1459 | { | |
1460 | const char *name; | |
1461 | char buf[SYMNMLEN + 1]; | |
1462 | ||
1463 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf); | |
1464 | if (name == NULL) | |
1465 | return false; | |
1466 | ||
1467 | if (! dont_skip_symbol | |
1468 | && ((finfo->info->strip == strip_some | |
1469 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, | |
1470 | false) == NULL)) | |
1471 | || (! global | |
1472 | && finfo->info->discard == discard_l | |
1473 | && bfd_is_local_label_name (input_bfd, name)))) | |
1474 | skip = true; | |
1475 | } | |
1476 | ||
1477 | /* If this is an enum, struct, or union tag, see if we have | |
1478 | already output an identical type. */ | |
1479 | if (! skip | |
1480 | && (finfo->output_bfd->flags & BFD_TRADITIONAL_FORMAT) == 0 | |
1481 | && (isym.n_sclass == C_ENTAG | |
1482 | || isym.n_sclass == C_STRTAG | |
1483 | || isym.n_sclass == C_UNTAG) | |
1484 | && isym.n_numaux == 1) | |
1485 | { | |
1486 | const char *name; | |
1487 | char buf[SYMNMLEN + 1]; | |
1488 | struct coff_debug_merge_hash_entry *mh; | |
1489 | struct coff_debug_merge_type *mt; | |
1490 | union internal_auxent aux; | |
1491 | struct coff_debug_merge_element **epp; | |
1492 | bfd_byte *esl, *eslend; | |
1493 | struct internal_syment *islp; | |
1494 | ||
1495 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf); | |
1496 | if (name == NULL) | |
1497 | return false; | |
1498 | ||
1499 | /* Ignore fake names invented by compiler; treat them all as | |
1500 | the same name. */ | |
1501 | if (*name == '~' || *name == '.' || *name == '$' | |
1502 | || (*name == bfd_get_symbol_leading_char (input_bfd) | |
1503 | && (name[1] == '~' || name[1] == '.' || name[1] == '$'))) | |
1504 | name = ""; | |
1505 | ||
1506 | mh = coff_debug_merge_hash_lookup (&finfo->debug_merge, name, | |
1507 | true, true); | |
1508 | if (mh == NULL) | |
1509 | return false; | |
1510 | ||
1511 | /* Allocate memory to hold type information. If this turns | |
1512 | out to be a duplicate, we pass this address to | |
1513 | bfd_release. */ | |
1514 | mt = ((struct coff_debug_merge_type *) | |
1515 | bfd_alloc (input_bfd, | |
1516 | sizeof (struct coff_debug_merge_type))); | |
1517 | if (mt == NULL) | |
1518 | return false; | |
1519 | mt->class = isym.n_sclass; | |
1520 | ||
1521 | /* Pick up the aux entry, which points to the end of the tag | |
1522 | entries. */ | |
1523 | bfd_coff_swap_aux_in (input_bfd, (PTR) (esym + isymesz), | |
1524 | isym.n_type, isym.n_sclass, 0, isym.n_numaux, | |
1525 | (PTR) &aux); | |
1526 | ||
1527 | /* Gather the elements. */ | |
1528 | epp = &mt->elements; | |
1529 | mt->elements = NULL; | |
1530 | islp = isymp + 2; | |
1531 | esl = esym + 2 * isymesz; | |
1532 | eslend = ((bfd_byte *) obj_coff_external_syms (input_bfd) | |
1533 | + aux.x_sym.x_fcnary.x_fcn.x_endndx.l * isymesz); | |
1534 | while (esl < eslend) | |
1535 | { | |
1536 | const char *elename; | |
1537 | char elebuf[SYMNMLEN + 1]; | |
00692651 | 1538 | char *name_copy; |
252b5132 RH |
1539 | |
1540 | bfd_coff_swap_sym_in (input_bfd, (PTR) esl, (PTR) islp); | |
1541 | ||
1542 | *epp = ((struct coff_debug_merge_element *) | |
1543 | bfd_alloc (input_bfd, | |
1544 | sizeof (struct coff_debug_merge_element))); | |
1545 | if (*epp == NULL) | |
1546 | return false; | |
1547 | ||
1548 | elename = _bfd_coff_internal_syment_name (input_bfd, islp, | |
1549 | elebuf); | |
1550 | if (elename == NULL) | |
1551 | return false; | |
1552 | ||
00692651 ILT |
1553 | name_copy = (char *) bfd_alloc (input_bfd, |
1554 | strlen (elename) + 1); | |
1555 | if (name_copy == NULL) | |
252b5132 | 1556 | return false; |
00692651 | 1557 | strcpy (name_copy, elename); |
252b5132 | 1558 | |
00692651 | 1559 | (*epp)->name = name_copy; |
252b5132 RH |
1560 | (*epp)->type = islp->n_type; |
1561 | (*epp)->tagndx = 0; | |
1562 | if (islp->n_numaux >= 1 | |
1563 | && islp->n_type != T_NULL | |
1564 | && islp->n_sclass != C_EOS) | |
1565 | { | |
1566 | union internal_auxent eleaux; | |
1567 | long indx; | |
1568 | ||
1569 | bfd_coff_swap_aux_in (input_bfd, (PTR) (esl + isymesz), | |
1570 | islp->n_type, islp->n_sclass, 0, | |
1571 | islp->n_numaux, (PTR) &eleaux); | |
1572 | indx = eleaux.x_sym.x_tagndx.l; | |
1573 | ||
1574 | /* FIXME: If this tagndx entry refers to a symbol | |
1575 | defined later in this file, we just ignore it. | |
1576 | Handling this correctly would be tedious, and may | |
1577 | not be required. */ | |
1578 | ||
1579 | if (indx > 0 | |
1580 | && (indx | |
1581 | < ((esym - | |
1582 | (bfd_byte *) obj_coff_external_syms (input_bfd)) | |
1583 | / (long) isymesz))) | |
1584 | { | |
1585 | (*epp)->tagndx = finfo->sym_indices[indx]; | |
1586 | if ((*epp)->tagndx < 0) | |
1587 | (*epp)->tagndx = 0; | |
1588 | } | |
1589 | } | |
1590 | epp = &(*epp)->next; | |
1591 | *epp = NULL; | |
1592 | ||
1593 | esl += (islp->n_numaux + 1) * isymesz; | |
1594 | islp += islp->n_numaux + 1; | |
1595 | } | |
1596 | ||
1597 | /* See if we already have a definition which matches this | |
1598 | type. We always output the type if it has no elements, | |
1599 | for simplicity. */ | |
1600 | if (mt->elements == NULL) | |
1601 | bfd_release (input_bfd, (PTR) mt); | |
1602 | else | |
1603 | { | |
1604 | struct coff_debug_merge_type *mtl; | |
1605 | ||
1606 | for (mtl = mh->types; mtl != NULL; mtl = mtl->next) | |
1607 | { | |
1608 | struct coff_debug_merge_element *me, *mel; | |
1609 | ||
1610 | if (mtl->class != mt->class) | |
1611 | continue; | |
1612 | ||
1613 | for (me = mt->elements, mel = mtl->elements; | |
1614 | me != NULL && mel != NULL; | |
1615 | me = me->next, mel = mel->next) | |
1616 | { | |
1617 | if (strcmp (me->name, mel->name) != 0 | |
1618 | || me->type != mel->type | |
1619 | || me->tagndx != mel->tagndx) | |
1620 | break; | |
1621 | } | |
1622 | ||
1623 | if (me == NULL && mel == NULL) | |
1624 | break; | |
1625 | } | |
1626 | ||
1627 | if (mtl == NULL || (bfd_size_type) mtl->indx >= syment_base) | |
1628 | { | |
1629 | /* This is the first definition of this type. */ | |
1630 | mt->indx = output_index; | |
1631 | mt->next = mh->types; | |
1632 | mh->types = mt; | |
1633 | } | |
1634 | else | |
1635 | { | |
1636 | /* This is a redefinition which can be merged. */ | |
1637 | bfd_release (input_bfd, (PTR) mt); | |
1638 | *indexp = mtl->indx; | |
1639 | add = (eslend - esym) / isymesz; | |
1640 | skip = true; | |
1641 | } | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | /* We now know whether we are to skip this symbol or not. */ | |
1646 | if (! skip) | |
1647 | { | |
1648 | /* Adjust the symbol in order to output it. */ | |
1649 | ||
1650 | if (isym._n._n_n._n_zeroes == 0 | |
1651 | && isym._n._n_n._n_offset != 0) | |
1652 | { | |
1653 | const char *name; | |
1654 | bfd_size_type indx; | |
1655 | ||
1656 | /* This symbol has a long name. Enter it in the string | |
1657 | table we are building. Note that we do not check | |
1658 | bfd_coff_symname_in_debug. That is only true for | |
1659 | XCOFF, and XCOFF requires different linking code | |
1660 | anyhow. */ | |
1661 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, | |
1662 | (char *) NULL); | |
1663 | if (name == NULL) | |
1664 | return false; | |
1665 | indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy); | |
1666 | if (indx == (bfd_size_type) -1) | |
1667 | return false; | |
1668 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; | |
1669 | } | |
1670 | ||
1671 | if (isym.n_scnum > 0) | |
1672 | { | |
1673 | isym.n_scnum = (*secpp)->output_section->target_index; | |
1674 | isym.n_value += (*secpp)->output_offset; | |
1675 | if (! obj_pe (input_bfd)) | |
1676 | isym.n_value -= (*secpp)->vma; | |
1677 | if (! obj_pe (finfo->output_bfd)) | |
1678 | isym.n_value += (*secpp)->output_section->vma; | |
1679 | } | |
1680 | ||
1681 | /* The value of a C_FILE symbol is the symbol index of the | |
1682 | next C_FILE symbol. The value of the last C_FILE symbol | |
1683 | is the symbol index to the first external symbol | |
1684 | (actually, coff_renumber_symbols does not get this | |
1685 | right--it just sets the value of the last C_FILE symbol | |
1686 | to zero--and nobody has ever complained about it). We | |
1687 | try to get this right, below, just before we write the | |
1688 | symbols out, but in the general case we may have to write | |
1689 | the symbol out twice. */ | |
1690 | if (isym.n_sclass == C_FILE) | |
1691 | { | |
1692 | if (finfo->last_file_index != -1 | |
1693 | && finfo->last_file.n_value != (long) output_index) | |
1694 | { | |
1695 | /* We must correct the value of the last C_FILE entry. */ | |
1696 | finfo->last_file.n_value = output_index; | |
1697 | if ((bfd_size_type) finfo->last_file_index >= syment_base) | |
1698 | { | |
1699 | /* The last C_FILE symbol is in this input file. */ | |
1700 | bfd_coff_swap_sym_out (output_bfd, | |
1701 | (PTR) &finfo->last_file, | |
1702 | (PTR) (finfo->outsyms | |
1703 | + ((finfo->last_file_index | |
1704 | - syment_base) | |
1705 | * osymesz))); | |
1706 | } | |
1707 | else | |
1708 | { | |
1709 | /* We have already written out the last C_FILE | |
1710 | symbol. We need to write it out again. We | |
1711 | borrow *outsym temporarily. */ | |
1712 | bfd_coff_swap_sym_out (output_bfd, | |
1713 | (PTR) &finfo->last_file, | |
1714 | (PTR) outsym); | |
1715 | if (bfd_seek (output_bfd, | |
1716 | (obj_sym_filepos (output_bfd) | |
1717 | + finfo->last_file_index * osymesz), | |
1718 | SEEK_SET) != 0 | |
1719 | || (bfd_write (outsym, osymesz, 1, output_bfd) | |
1720 | != osymesz)) | |
1721 | return false; | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | finfo->last_file_index = output_index; | |
1726 | finfo->last_file = isym; | |
1727 | } | |
1728 | ||
1729 | /* If doing task linking, convert normal global function symbols to | |
1730 | static functions. */ | |
1731 | ||
1732 | if (finfo->info->task_link | |
1733 | && (isym.n_sclass == C_EXT | |
1734 | || isym.n_sclass == C_WEAKEXT | |
1735 | || (obj_pe (input_bfd) && isym.n_sclass == C_NT_WEAK))) | |
1736 | isym.n_sclass = C_STAT; | |
1737 | ||
1738 | /* Output the symbol. */ | |
1739 | ||
1740 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); | |
1741 | ||
1742 | *indexp = output_index; | |
1743 | ||
1744 | if (global) | |
1745 | { | |
1746 | long indx; | |
1747 | struct coff_link_hash_entry *h; | |
1748 | ||
1749 | indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd)) | |
1750 | / isymesz); | |
1751 | h = obj_coff_sym_hashes (input_bfd)[indx]; | |
1752 | if (h == NULL) | |
1753 | { | |
1754 | /* This can happen if there were errors earlier in | |
1755 | the link. */ | |
1756 | bfd_set_error (bfd_error_bad_value); | |
1757 | return false; | |
1758 | } | |
1759 | h->indx = output_index; | |
1760 | } | |
1761 | ||
1762 | output_index += add; | |
1763 | outsym += add * osymesz; | |
1764 | } | |
1765 | ||
1766 | esym += add * isymesz; | |
1767 | isymp += add; | |
1768 | ++secpp; | |
1769 | ++indexp; | |
1770 | for (--add; add > 0; --add) | |
1771 | { | |
1772 | *secpp++ = NULL; | |
1773 | *indexp++ = -1; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | /* Fix up the aux entries. This must be done in a separate pass, | |
1778 | because we don't know the correct symbol indices until we have | |
1779 | already decided which symbols we are going to keep. */ | |
1780 | ||
1781 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); | |
1782 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; | |
1783 | isymp = finfo->internal_syms; | |
1784 | indexp = finfo->sym_indices; | |
1785 | sym_hash = obj_coff_sym_hashes (input_bfd); | |
1786 | outsym = finfo->outsyms; | |
1787 | while (esym < esym_end) | |
1788 | { | |
1789 | int add; | |
1790 | ||
1791 | add = 1 + isymp->n_numaux; | |
1792 | ||
1793 | if ((*indexp < 0 | |
1794 | || (bfd_size_type) *indexp < syment_base) | |
1795 | && (*sym_hash == NULL | |
1796 | || (*sym_hash)->auxbfd != input_bfd)) | |
1797 | esym += add * isymesz; | |
1798 | else | |
1799 | { | |
1800 | struct coff_link_hash_entry *h; | |
1801 | int i; | |
1802 | ||
1803 | h = NULL; | |
1804 | if (*indexp < 0) | |
1805 | { | |
1806 | h = *sym_hash; | |
1807 | ||
1808 | /* The m68k-motorola-sysv assembler will sometimes | |
1809 | generate two symbols with the same name, but only one | |
1810 | will have aux entries. */ | |
1811 | BFD_ASSERT (isymp->n_numaux == 0 | |
1812 | || h->numaux == isymp->n_numaux); | |
1813 | } | |
1814 | ||
1815 | esym += isymesz; | |
1816 | ||
1817 | if (h == NULL) | |
1818 | outsym += osymesz; | |
1819 | ||
1820 | /* Handle the aux entries. This handling is based on | |
1821 | coff_pointerize_aux. I don't know if it always correct. */ | |
1822 | for (i = 0; i < isymp->n_numaux && esym < esym_end; i++) | |
1823 | { | |
1824 | union internal_auxent aux; | |
1825 | union internal_auxent *auxp; | |
1826 | ||
1827 | if (h != NULL) | |
1828 | auxp = h->aux + i; | |
1829 | else | |
1830 | { | |
1831 | bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type, | |
1832 | isymp->n_sclass, i, isymp->n_numaux, | |
1833 | (PTR) &aux); | |
1834 | auxp = &aux; | |
1835 | } | |
1836 | ||
1837 | if (isymp->n_sclass == C_FILE) | |
1838 | { | |
1839 | /* If this is a long filename, we must put it in the | |
1840 | string table. */ | |
1841 | if (auxp->x_file.x_n.x_zeroes == 0 | |
1842 | && auxp->x_file.x_n.x_offset != 0) | |
1843 | { | |
1844 | const char *filename; | |
1845 | bfd_size_type indx; | |
1846 | ||
1847 | BFD_ASSERT (auxp->x_file.x_n.x_offset | |
1848 | >= STRING_SIZE_SIZE); | |
1849 | if (strings == NULL) | |
1850 | { | |
1851 | strings = _bfd_coff_read_string_table (input_bfd); | |
1852 | if (strings == NULL) | |
1853 | return false; | |
1854 | } | |
1855 | filename = strings + auxp->x_file.x_n.x_offset; | |
1856 | indx = _bfd_stringtab_add (finfo->strtab, filename, | |
1857 | hash, copy); | |
1858 | if (indx == (bfd_size_type) -1) | |
1859 | return false; | |
1860 | auxp->x_file.x_n.x_offset = STRING_SIZE_SIZE + indx; | |
1861 | } | |
1862 | } | |
1863 | else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL) | |
1864 | { | |
1865 | unsigned long indx; | |
1866 | ||
1867 | if (ISFCN (isymp->n_type) | |
1868 | || ISTAG (isymp->n_sclass) | |
1869 | || isymp->n_sclass == C_BLOCK | |
1870 | || isymp->n_sclass == C_FCN) | |
1871 | { | |
1872 | indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l; | |
1873 | if (indx > 0 | |
1874 | && indx < obj_raw_syment_count (input_bfd)) | |
1875 | { | |
1876 | /* We look forward through the symbol for | |
1877 | the index of the next symbol we are going | |
1878 | to include. I don't know if this is | |
1879 | entirely right. */ | |
1880 | while ((finfo->sym_indices[indx] < 0 | |
1881 | || ((bfd_size_type) finfo->sym_indices[indx] | |
1882 | < syment_base)) | |
1883 | && indx < obj_raw_syment_count (input_bfd)) | |
1884 | ++indx; | |
1885 | if (indx >= obj_raw_syment_count (input_bfd)) | |
1886 | indx = output_index; | |
1887 | else | |
1888 | indx = finfo->sym_indices[indx]; | |
1889 | auxp->x_sym.x_fcnary.x_fcn.x_endndx.l = indx; | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | indx = auxp->x_sym.x_tagndx.l; | |
1894 | if (indx > 0 && indx < obj_raw_syment_count (input_bfd)) | |
1895 | { | |
1896 | long symindx; | |
1897 | ||
1898 | symindx = finfo->sym_indices[indx]; | |
1899 | if (symindx < 0) | |
1900 | auxp->x_sym.x_tagndx.l = 0; | |
1901 | else | |
1902 | auxp->x_sym.x_tagndx.l = symindx; | |
1903 | } | |
1904 | ||
1905 | /* The .bf symbols are supposed to be linked through | |
1906 | the endndx field. We need to carry this list | |
1907 | across object files. */ | |
1908 | if (i == 0 | |
1909 | && h == NULL | |
1910 | && isymp->n_sclass == C_FCN | |
1911 | && (isymp->_n._n_n._n_zeroes != 0 | |
1912 | || isymp->_n._n_n._n_offset == 0) | |
1913 | && isymp->_n._n_name[0] == '.' | |
1914 | && isymp->_n._n_name[1] == 'b' | |
1915 | && isymp->_n._n_name[2] == 'f' | |
1916 | && isymp->_n._n_name[3] == '\0') | |
1917 | { | |
1918 | if (finfo->last_bf_index != -1) | |
1919 | { | |
1920 | finfo->last_bf.x_sym.x_fcnary.x_fcn.x_endndx.l = | |
1921 | *indexp; | |
1922 | ||
1923 | if ((bfd_size_type) finfo->last_bf_index | |
1924 | >= syment_base) | |
1925 | { | |
1926 | PTR auxout; | |
1927 | ||
1928 | /* The last .bf symbol is in this input | |
1929 | file. This will only happen if the | |
1930 | assembler did not set up the .bf | |
1931 | endndx symbols correctly. */ | |
1932 | auxout = (PTR) (finfo->outsyms | |
1933 | + ((finfo->last_bf_index | |
1934 | - syment_base) | |
1935 | * osymesz)); | |
1936 | bfd_coff_swap_aux_out (output_bfd, | |
1937 | (PTR) &finfo->last_bf, | |
1938 | isymp->n_type, | |
1939 | isymp->n_sclass, | |
1940 | 0, isymp->n_numaux, | |
1941 | auxout); | |
1942 | } | |
1943 | else | |
1944 | { | |
1945 | /* We have already written out the last | |
1946 | .bf aux entry. We need to write it | |
1947 | out again. We borrow *outsym | |
1948 | temporarily. FIXME: This case should | |
1949 | be made faster. */ | |
1950 | bfd_coff_swap_aux_out (output_bfd, | |
1951 | (PTR) &finfo->last_bf, | |
1952 | isymp->n_type, | |
1953 | isymp->n_sclass, | |
1954 | 0, isymp->n_numaux, | |
1955 | (PTR) outsym); | |
1956 | if (bfd_seek (output_bfd, | |
1957 | (obj_sym_filepos (output_bfd) | |
1958 | + finfo->last_bf_index * osymesz), | |
1959 | SEEK_SET) != 0 | |
1960 | || bfd_write (outsym, osymesz, 1, | |
1961 | output_bfd) != osymesz) | |
1962 | return false; | |
1963 | } | |
1964 | } | |
1965 | ||
1966 | if (auxp->x_sym.x_fcnary.x_fcn.x_endndx.l != 0) | |
1967 | finfo->last_bf_index = -1; | |
1968 | else | |
1969 | { | |
1970 | /* The endndx field of this aux entry must | |
1971 | be updated with the symbol number of the | |
1972 | next .bf symbol. */ | |
1973 | finfo->last_bf = *auxp; | |
1974 | finfo->last_bf_index = (((outsym - finfo->outsyms) | |
1975 | / osymesz) | |
1976 | + syment_base); | |
1977 | } | |
1978 | } | |
1979 | } | |
1980 | ||
1981 | if (h == NULL) | |
1982 | { | |
1983 | bfd_coff_swap_aux_out (output_bfd, (PTR) auxp, isymp->n_type, | |
1984 | isymp->n_sclass, i, isymp->n_numaux, | |
1985 | (PTR) outsym); | |
1986 | outsym += osymesz; | |
1987 | } | |
1988 | ||
1989 | esym += isymesz; | |
1990 | } | |
1991 | } | |
1992 | ||
1993 | indexp += add; | |
1994 | isymp += add; | |
1995 | sym_hash += add; | |
1996 | } | |
1997 | ||
1998 | /* Relocate the line numbers, unless we are stripping them. */ | |
1999 | if (finfo->info->strip == strip_none | |
2000 | || finfo->info->strip == strip_some) | |
2001 | { | |
2002 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
2003 | { | |
2004 | bfd_vma offset; | |
2005 | bfd_byte *eline; | |
2006 | bfd_byte *elineend; | |
2007 | ||
2008 | /* FIXME: If SEC_HAS_CONTENTS is not for the section, then | |
2009 | build_link_order in ldwrite.c will not have created a | |
2010 | link order, which means that we will not have seen this | |
2011 | input section in _bfd_coff_final_link, which means that | |
2012 | we will not have allocated space for the line numbers of | |
2013 | this section. I don't think line numbers can be | |
2014 | meaningful for a section which does not have | |
2015 | SEC_HAS_CONTENTS set, but, if they do, this must be | |
2016 | changed. */ | |
2017 | if (o->lineno_count == 0 | |
2018 | || (o->output_section->flags & SEC_HAS_CONTENTS) == 0) | |
2019 | continue; | |
2020 | ||
2021 | if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0 | |
2022 | || bfd_read (finfo->linenos, linesz, o->lineno_count, | |
2023 | input_bfd) != linesz * o->lineno_count) | |
2024 | return false; | |
2025 | ||
2026 | offset = o->output_section->vma + o->output_offset - o->vma; | |
2027 | eline = finfo->linenos; | |
2028 | elineend = eline + linesz * o->lineno_count; | |
2029 | for (; eline < elineend; eline += linesz) | |
2030 | { | |
2031 | struct internal_lineno iline; | |
2032 | ||
2033 | bfd_coff_swap_lineno_in (input_bfd, (PTR) eline, (PTR) &iline); | |
2034 | ||
2035 | if (iline.l_lnno != 0) | |
2036 | iline.l_addr.l_paddr += offset; | |
2037 | else if (iline.l_addr.l_symndx >= 0 | |
2038 | && ((unsigned long) iline.l_addr.l_symndx | |
2039 | < obj_raw_syment_count (input_bfd))) | |
2040 | { | |
2041 | long indx; | |
2042 | ||
2043 | indx = finfo->sym_indices[iline.l_addr.l_symndx]; | |
2044 | ||
2045 | if (indx < 0) | |
2046 | { | |
2047 | /* These line numbers are attached to a symbol | |
2048 | which we are stripping. We should really | |
2049 | just discard the line numbers, but that would | |
2050 | be a pain because we have already counted | |
2051 | them. */ | |
2052 | indx = 0; | |
2053 | } | |
2054 | else | |
2055 | { | |
2056 | struct internal_syment is; | |
2057 | union internal_auxent ia; | |
2058 | ||
2059 | /* Fix up the lnnoptr field in the aux entry of | |
2060 | the symbol. It turns out that we can't do | |
2061 | this when we modify the symbol aux entries, | |
2062 | because gas sometimes screws up the lnnoptr | |
2063 | field and makes it an offset from the start | |
2064 | of the line numbers rather than an absolute | |
2065 | file index. */ | |
2066 | bfd_coff_swap_sym_in (output_bfd, | |
2067 | (PTR) (finfo->outsyms | |
2068 | + ((indx - syment_base) | |
2069 | * osymesz)), | |
2070 | (PTR) &is); | |
2071 | if ((ISFCN (is.n_type) | |
2072 | || is.n_sclass == C_BLOCK) | |
2073 | && is.n_numaux >= 1) | |
2074 | { | |
2075 | PTR auxptr; | |
2076 | ||
2077 | auxptr = (PTR) (finfo->outsyms | |
2078 | + ((indx - syment_base + 1) | |
2079 | * osymesz)); | |
2080 | bfd_coff_swap_aux_in (output_bfd, auxptr, | |
2081 | is.n_type, is.n_sclass, | |
2082 | 0, is.n_numaux, (PTR) &ia); | |
2083 | ia.x_sym.x_fcnary.x_fcn.x_lnnoptr = | |
2084 | (o->output_section->line_filepos | |
2085 | + o->output_section->lineno_count * linesz | |
2086 | + eline - finfo->linenos); | |
2087 | bfd_coff_swap_aux_out (output_bfd, (PTR) &ia, | |
2088 | is.n_type, is.n_sclass, 0, | |
2089 | is.n_numaux, auxptr); | |
2090 | } | |
2091 | } | |
2092 | ||
2093 | iline.l_addr.l_symndx = indx; | |
2094 | } | |
2095 | ||
2096 | bfd_coff_swap_lineno_out (output_bfd, (PTR) &iline, (PTR) eline); | |
2097 | } | |
2098 | ||
2099 | if (bfd_seek (output_bfd, | |
2100 | (o->output_section->line_filepos | |
2101 | + o->output_section->lineno_count * linesz), | |
2102 | SEEK_SET) != 0 | |
2103 | || bfd_write (finfo->linenos, linesz, o->lineno_count, | |
2104 | output_bfd) != linesz * o->lineno_count) | |
2105 | return false; | |
2106 | ||
2107 | o->output_section->lineno_count += o->lineno_count; | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | /* If we swapped out a C_FILE symbol, guess that the next C_FILE | |
2112 | symbol will be the first symbol in the next input file. In the | |
2113 | normal case, this will save us from writing out the C_FILE symbol | |
2114 | again. */ | |
2115 | if (finfo->last_file_index != -1 | |
2116 | && (bfd_size_type) finfo->last_file_index >= syment_base) | |
2117 | { | |
2118 | finfo->last_file.n_value = output_index; | |
2119 | bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file, | |
2120 | (PTR) (finfo->outsyms | |
2121 | + ((finfo->last_file_index - syment_base) | |
2122 | * osymesz))); | |
2123 | } | |
2124 | ||
2125 | /* Write the modified symbols to the output file. */ | |
2126 | if (outsym > finfo->outsyms) | |
2127 | { | |
2128 | if (bfd_seek (output_bfd, | |
2129 | obj_sym_filepos (output_bfd) + syment_base * osymesz, | |
2130 | SEEK_SET) != 0 | |
2131 | || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, | |
2132 | output_bfd) | |
2133 | != (bfd_size_type) (outsym - finfo->outsyms))) | |
2134 | return false; | |
2135 | ||
2136 | BFD_ASSERT ((obj_raw_syment_count (output_bfd) | |
2137 | + (outsym - finfo->outsyms) / osymesz) | |
2138 | == output_index); | |
2139 | ||
2140 | obj_raw_syment_count (output_bfd) = output_index; | |
2141 | } | |
2142 | ||
2143 | /* Relocate the contents of each section. */ | |
2144 | adjust_symndx = coff_backend_info (input_bfd)->_bfd_coff_adjust_symndx; | |
2145 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
2146 | { | |
2147 | bfd_byte *contents; | |
2148 | struct coff_section_tdata *secdata; | |
2149 | ||
2150 | if (! o->linker_mark) | |
2151 | { | |
2152 | /* This section was omitted from the link. */ | |
2153 | continue; | |
2154 | } | |
2155 | ||
2156 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
2157 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
2158 | { | |
2159 | if ((o->flags & SEC_RELOC) != 0 | |
2160 | && o->reloc_count != 0) | |
2161 | { | |
2162 | ((*_bfd_error_handler) | |
2163 | (_("%s: relocs in section `%s', but it has no contents"), | |
2164 | bfd_get_filename (input_bfd), | |
2165 | bfd_get_section_name (input_bfd, o))); | |
2166 | bfd_set_error (bfd_error_no_contents); | |
2167 | return false; | |
2168 | } | |
2169 | ||
2170 | continue; | |
2171 | } | |
2172 | ||
2173 | secdata = coff_section_data (input_bfd, o); | |
2174 | if (secdata != NULL && secdata->contents != NULL) | |
2175 | contents = secdata->contents; | |
2176 | else | |
2177 | { | |
2178 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, | |
2179 | (file_ptr) 0, o->_raw_size)) | |
2180 | return false; | |
2181 | contents = finfo->contents; | |
2182 | } | |
2183 | ||
2184 | if ((o->flags & SEC_RELOC) != 0) | |
2185 | { | |
2186 | int target_index; | |
2187 | struct internal_reloc *internal_relocs; | |
2188 | struct internal_reloc *irel; | |
2189 | ||
2190 | /* Read in the relocs. */ | |
2191 | target_index = o->output_section->target_index; | |
2192 | internal_relocs = (_bfd_coff_read_internal_relocs | |
2193 | (input_bfd, o, false, finfo->external_relocs, | |
2194 | finfo->info->relocateable, | |
2195 | (finfo->info->relocateable | |
2196 | ? (finfo->section_info[target_index].relocs | |
2197 | + o->output_section->reloc_count) | |
2198 | : finfo->internal_relocs))); | |
2199 | if (internal_relocs == NULL) | |
2200 | return false; | |
2201 | ||
2202 | /* Call processor specific code to relocate the section | |
2203 | contents. */ | |
2204 | if (! bfd_coff_relocate_section (output_bfd, finfo->info, | |
2205 | input_bfd, o, | |
2206 | contents, | |
2207 | internal_relocs, | |
2208 | finfo->internal_syms, | |
2209 | finfo->sec_ptrs)) | |
2210 | return false; | |
2211 | ||
2212 | if (finfo->info->relocateable) | |
2213 | { | |
2214 | bfd_vma offset; | |
2215 | struct internal_reloc *irelend; | |
2216 | struct coff_link_hash_entry **rel_hash; | |
2217 | ||
2218 | offset = o->output_section->vma + o->output_offset - o->vma; | |
2219 | irel = internal_relocs; | |
2220 | irelend = irel + o->reloc_count; | |
2221 | rel_hash = (finfo->section_info[target_index].rel_hashes | |
2222 | + o->output_section->reloc_count); | |
2223 | for (; irel < irelend; irel++, rel_hash++) | |
2224 | { | |
2225 | struct coff_link_hash_entry *h; | |
2226 | boolean adjusted; | |
2227 | ||
2228 | *rel_hash = NULL; | |
2229 | ||
2230 | /* Adjust the reloc address and symbol index. */ | |
2231 | ||
2232 | irel->r_vaddr += offset; | |
2233 | ||
2234 | if (irel->r_symndx == -1) | |
2235 | continue; | |
2236 | ||
2237 | if (adjust_symndx) | |
2238 | { | |
2239 | if (! (*adjust_symndx) (output_bfd, finfo->info, | |
2240 | input_bfd, o, irel, | |
2241 | &adjusted)) | |
2242 | return false; | |
2243 | if (adjusted) | |
2244 | continue; | |
2245 | } | |
2246 | ||
2247 | h = obj_coff_sym_hashes (input_bfd)[irel->r_symndx]; | |
2248 | if (h != NULL) | |
2249 | { | |
2250 | /* This is a global symbol. */ | |
2251 | if (h->indx >= 0) | |
2252 | irel->r_symndx = h->indx; | |
2253 | else | |
2254 | { | |
2255 | /* This symbol is being written at the end | |
2256 | of the file, and we do not yet know the | |
2257 | symbol index. We save the pointer to the | |
2258 | hash table entry in the rel_hash list. | |
2259 | We set the indx field to -2 to indicate | |
2260 | that this symbol must not be stripped. */ | |
2261 | *rel_hash = h; | |
2262 | h->indx = -2; | |
2263 | } | |
2264 | } | |
2265 | else | |
2266 | { | |
2267 | long indx; | |
2268 | ||
2269 | indx = finfo->sym_indices[irel->r_symndx]; | |
2270 | if (indx != -1) | |
2271 | irel->r_symndx = indx; | |
2272 | else | |
2273 | { | |
2274 | struct internal_syment *is; | |
2275 | const char *name; | |
2276 | char buf[SYMNMLEN + 1]; | |
2277 | ||
2278 | /* This reloc is against a symbol we are | |
2279 | stripping. This should have been handled | |
2280 | by the 'dont_skip_symbol' code in the while | |
2281 | loop at the top of this function. */ | |
2282 | ||
2283 | is = finfo->internal_syms + irel->r_symndx; | |
2284 | ||
2285 | name = (_bfd_coff_internal_syment_name | |
2286 | (input_bfd, is, buf)); | |
2287 | if (name == NULL) | |
2288 | return false; | |
2289 | ||
2290 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
2291 | (finfo->info, name, input_bfd, o, | |
2292 | irel->r_vaddr))) | |
2293 | return false; | |
2294 | } | |
2295 | } | |
2296 | } | |
2297 | ||
2298 | o->output_section->reloc_count += o->reloc_count; | |
2299 | } | |
2300 | } | |
2301 | ||
2302 | /* Write out the modified section contents. */ | |
2303 | if (secdata == NULL || secdata->stab_info == NULL) | |
2304 | { | |
2305 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
2306 | contents, o->output_offset, | |
2307 | (o->_cooked_size != 0 | |
2308 | ? o->_cooked_size | |
2309 | : o->_raw_size))) | |
2310 | return false; | |
2311 | } | |
2312 | else | |
2313 | { | |
2314 | if (! (_bfd_write_section_stabs | |
2315 | (output_bfd, &coff_hash_table (finfo->info)->stab_info, | |
2316 | o, &secdata->stab_info, contents))) | |
2317 | return false; | |
2318 | } | |
2319 | } | |
2320 | ||
2321 | if (! finfo->info->keep_memory) | |
2322 | { | |
2323 | if (! _bfd_coff_free_symbols (input_bfd)) | |
2324 | return false; | |
2325 | } | |
2326 | ||
2327 | return true; | |
2328 | } | |
2329 | ||
2330 | /* Write out a global symbol. Called via coff_link_hash_traverse. */ | |
2331 | ||
2332 | boolean | |
2333 | _bfd_coff_write_global_sym (h, data) | |
2334 | struct coff_link_hash_entry *h; | |
2335 | PTR data; | |
2336 | { | |
2337 | struct coff_final_link_info *finfo = (struct coff_final_link_info *) data; | |
2338 | bfd *output_bfd; | |
2339 | struct internal_syment isym; | |
2340 | bfd_size_type symesz; | |
2341 | unsigned int i; | |
2342 | ||
2343 | output_bfd = finfo->output_bfd; | |
2344 | ||
2345 | if (h->indx >= 0) | |
2346 | return true; | |
2347 | ||
2348 | if (h->indx != -2 | |
2349 | && (finfo->info->strip == strip_all | |
2350 | || (finfo->info->strip == strip_some | |
2351 | && (bfd_hash_lookup (finfo->info->keep_hash, | |
2352 | h->root.root.string, false, false) | |
2353 | == NULL)))) | |
2354 | return true; | |
2355 | ||
2356 | switch (h->root.type) | |
2357 | { | |
2358 | default: | |
2359 | case bfd_link_hash_new: | |
2360 | abort (); | |
2361 | return false; | |
2362 | ||
2363 | case bfd_link_hash_undefined: | |
2364 | case bfd_link_hash_undefweak: | |
2365 | isym.n_scnum = N_UNDEF; | |
2366 | isym.n_value = 0; | |
2367 | break; | |
2368 | ||
2369 | case bfd_link_hash_defined: | |
2370 | case bfd_link_hash_defweak: | |
2371 | { | |
2372 | asection *sec; | |
2373 | ||
2374 | sec = h->root.u.def.section->output_section; | |
2375 | if (bfd_is_abs_section (sec)) | |
2376 | isym.n_scnum = N_ABS; | |
2377 | else | |
2378 | isym.n_scnum = sec->target_index; | |
2379 | isym.n_value = (h->root.u.def.value | |
2380 | + h->root.u.def.section->output_offset); | |
2381 | if (! obj_pe (finfo->output_bfd)) | |
2382 | isym.n_value += sec->vma; | |
2383 | } | |
2384 | break; | |
2385 | ||
2386 | case bfd_link_hash_common: | |
2387 | isym.n_scnum = N_UNDEF; | |
2388 | isym.n_value = h->root.u.c.size; | |
2389 | break; | |
2390 | ||
2391 | case bfd_link_hash_indirect: | |
2392 | case bfd_link_hash_warning: | |
2393 | /* Just ignore these. They can't be handled anyhow. */ | |
2394 | return true; | |
2395 | } | |
2396 | ||
2397 | if (strlen (h->root.root.string) <= SYMNMLEN) | |
2398 | strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN); | |
2399 | else | |
2400 | { | |
2401 | boolean hash; | |
2402 | bfd_size_type indx; | |
2403 | ||
2404 | hash = true; | |
2405 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) | |
2406 | hash = false; | |
2407 | indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash, | |
2408 | false); | |
2409 | if (indx == (bfd_size_type) -1) | |
2410 | { | |
2411 | finfo->failed = true; | |
2412 | return false; | |
2413 | } | |
2414 | isym._n._n_n._n_zeroes = 0; | |
2415 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; | |
2416 | } | |
2417 | ||
2418 | isym.n_sclass = h->class; | |
2419 | isym.n_type = h->type; | |
2420 | ||
2421 | if (isym.n_sclass == C_NULL) | |
2422 | isym.n_sclass = C_EXT; | |
2423 | ||
2424 | /* If doing task linking and this is the pass where we convert | |
2425 | defined globals to statics, then do that conversion now. If the | |
2426 | symbol is not being converted, just ignore it and it will be | |
2427 | output during a later pass. */ | |
2428 | if (finfo->global_to_static) | |
2429 | { | |
2430 | if (isym.n_sclass != C_EXT | |
2431 | && isym.n_sclass != C_WEAKEXT | |
2432 | && (! obj_pe (output_bfd) || isym.n_sclass != C_NT_WEAK)) | |
2433 | { | |
2434 | return true; | |
2435 | } | |
2436 | isym.n_sclass = C_STAT; | |
2437 | } | |
2438 | ||
2439 | isym.n_numaux = h->numaux; | |
2440 | ||
2441 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) finfo->outsyms); | |
2442 | ||
2443 | symesz = bfd_coff_symesz (output_bfd); | |
2444 | ||
2445 | if (bfd_seek (output_bfd, | |
2446 | (obj_sym_filepos (output_bfd) | |
2447 | + obj_raw_syment_count (output_bfd) * symesz), | |
2448 | SEEK_SET) != 0 | |
2449 | || bfd_write (finfo->outsyms, symesz, 1, output_bfd) != symesz) | |
2450 | { | |
2451 | finfo->failed = true; | |
2452 | return false; | |
2453 | } | |
2454 | ||
2455 | h->indx = obj_raw_syment_count (output_bfd); | |
2456 | ||
2457 | ++obj_raw_syment_count (output_bfd); | |
2458 | ||
2459 | /* Write out any associated aux entries. There normally will be | |
2460 | none. If there are any, I have no idea how to modify them. */ | |
2461 | for (i = 0; i < isym.n_numaux; i++) | |
2462 | { | |
2463 | bfd_coff_swap_aux_out (output_bfd, (PTR) (h->aux + i), isym.n_type, | |
2464 | isym.n_sclass, i, isym.n_numaux, | |
2465 | (PTR) finfo->outsyms); | |
2466 | if (bfd_write (finfo->outsyms, symesz, 1, output_bfd) != symesz) | |
2467 | { | |
2468 | finfo->failed = true; | |
2469 | return false; | |
2470 | } | |
2471 | ++obj_raw_syment_count (output_bfd); | |
2472 | } | |
2473 | ||
2474 | return true; | |
2475 | } | |
2476 | ||
2477 | /* Write out task global symbols, converting them to statics. Called | |
2478 | via coff_link_hash_traverse. Calls bfd_coff_write_global_sym to do | |
2479 | the dirty work, if the symbol we are processing needs conversion. */ | |
2480 | ||
2481 | boolean | |
2482 | _bfd_coff_write_task_globals (h, data) | |
2483 | struct coff_link_hash_entry *h; | |
2484 | PTR data; | |
2485 | { | |
2486 | struct coff_final_link_info *finfo = (struct coff_final_link_info *) data; | |
2487 | boolean rtnval = true; | |
2488 | boolean save_global_to_static; | |
2489 | ||
2490 | if (h->indx < 0) | |
2491 | { | |
2492 | switch (h->root.type) | |
2493 | { | |
2494 | case bfd_link_hash_defined: | |
2495 | case bfd_link_hash_defweak: | |
2496 | save_global_to_static = finfo->global_to_static; | |
2497 | finfo->global_to_static = true; | |
2498 | rtnval = _bfd_coff_write_global_sym (h, data); | |
2499 | finfo->global_to_static = save_global_to_static; | |
2500 | break; | |
2501 | default: | |
2502 | break; | |
2503 | } | |
2504 | } | |
2505 | return (rtnval); | |
2506 | } | |
2507 | ||
2508 | /* Handle a link order which is supposed to generate a reloc. */ | |
2509 | ||
2510 | boolean | |
2511 | _bfd_coff_reloc_link_order (output_bfd, finfo, output_section, link_order) | |
2512 | bfd *output_bfd; | |
2513 | struct coff_final_link_info *finfo; | |
2514 | asection *output_section; | |
2515 | struct bfd_link_order *link_order; | |
2516 | { | |
2517 | reloc_howto_type *howto; | |
2518 | struct internal_reloc *irel; | |
2519 | struct coff_link_hash_entry **rel_hash_ptr; | |
2520 | ||
2521 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
2522 | if (howto == NULL) | |
2523 | { | |
2524 | bfd_set_error (bfd_error_bad_value); | |
2525 | return false; | |
2526 | } | |
2527 | ||
2528 | if (link_order->u.reloc.p->addend != 0) | |
2529 | { | |
2530 | bfd_size_type size; | |
2531 | bfd_byte *buf; | |
2532 | bfd_reloc_status_type rstat; | |
2533 | boolean ok; | |
2534 | ||
2535 | size = bfd_get_reloc_size (howto); | |
2536 | buf = (bfd_byte *) bfd_zmalloc (size); | |
2537 | if (buf == NULL) | |
2538 | return false; | |
2539 | ||
2540 | rstat = _bfd_relocate_contents (howto, output_bfd, | |
2541 | link_order->u.reloc.p->addend, buf); | |
2542 | switch (rstat) | |
2543 | { | |
2544 | case bfd_reloc_ok: | |
2545 | break; | |
2546 | default: | |
2547 | case bfd_reloc_outofrange: | |
2548 | abort (); | |
2549 | case bfd_reloc_overflow: | |
2550 | if (! ((*finfo->info->callbacks->reloc_overflow) | |
2551 | (finfo->info, | |
2552 | (link_order->type == bfd_section_reloc_link_order | |
2553 | ? bfd_section_name (output_bfd, | |
2554 | link_order->u.reloc.p->u.section) | |
2555 | : link_order->u.reloc.p->u.name), | |
2556 | howto->name, link_order->u.reloc.p->addend, | |
2557 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
2558 | { | |
2559 | free (buf); | |
2560 | return false; | |
2561 | } | |
2562 | break; | |
2563 | } | |
2564 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
2565 | (file_ptr) link_order->offset, size); | |
2566 | free (buf); | |
2567 | if (! ok) | |
2568 | return false; | |
2569 | } | |
2570 | ||
2571 | /* Store the reloc information in the right place. It will get | |
2572 | swapped and written out at the end of the final_link routine. */ | |
2573 | ||
2574 | irel = (finfo->section_info[output_section->target_index].relocs | |
2575 | + output_section->reloc_count); | |
2576 | rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes | |
2577 | + output_section->reloc_count); | |
2578 | ||
2579 | memset (irel, 0, sizeof (struct internal_reloc)); | |
2580 | *rel_hash_ptr = NULL; | |
2581 | ||
2582 | irel->r_vaddr = output_section->vma + link_order->offset; | |
2583 | ||
2584 | if (link_order->type == bfd_section_reloc_link_order) | |
2585 | { | |
2586 | /* We need to somehow locate a symbol in the right section. The | |
2587 | symbol must either have a value of zero, or we must adjust | |
2588 | the addend by the value of the symbol. FIXME: Write this | |
2589 | when we need it. The old linker couldn't handle this anyhow. */ | |
2590 | abort (); | |
2591 | *rel_hash_ptr = NULL; | |
2592 | irel->r_symndx = 0; | |
2593 | } | |
2594 | else | |
2595 | { | |
2596 | struct coff_link_hash_entry *h; | |
2597 | ||
2598 | h = ((struct coff_link_hash_entry *) | |
2599 | bfd_wrapped_link_hash_lookup (output_bfd, finfo->info, | |
2600 | link_order->u.reloc.p->u.name, | |
2601 | false, false, true)); | |
2602 | if (h != NULL) | |
2603 | { | |
2604 | if (h->indx >= 0) | |
2605 | irel->r_symndx = h->indx; | |
2606 | else | |
2607 | { | |
2608 | /* Set the index to -2 to force this symbol to get | |
2609 | written out. */ | |
2610 | h->indx = -2; | |
2611 | *rel_hash_ptr = h; | |
2612 | irel->r_symndx = 0; | |
2613 | } | |
2614 | } | |
2615 | else | |
2616 | { | |
2617 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
2618 | (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
2619 | (asection *) NULL, (bfd_vma) 0))) | |
2620 | return false; | |
2621 | irel->r_symndx = 0; | |
2622 | } | |
2623 | } | |
2624 | ||
2625 | /* FIXME: Is this always right? */ | |
2626 | irel->r_type = howto->type; | |
2627 | ||
2628 | /* r_size is only used on the RS/6000, which needs its own linker | |
2629 | routines anyhow. r_extern is only used for ECOFF. */ | |
2630 | ||
2631 | /* FIXME: What is the right value for r_offset? Is zero OK? */ | |
2632 | ||
2633 | ++output_section->reloc_count; | |
2634 | ||
2635 | return true; | |
2636 | } | |
2637 | ||
2638 | /* A basic reloc handling routine which may be used by processors with | |
2639 | simple relocs. */ | |
2640 | ||
2641 | boolean | |
2642 | _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, | |
2643 | input_section, contents, relocs, syms, | |
2644 | sections) | |
2645 | bfd *output_bfd; | |
2646 | struct bfd_link_info *info; | |
2647 | bfd *input_bfd; | |
2648 | asection *input_section; | |
2649 | bfd_byte *contents; | |
2650 | struct internal_reloc *relocs; | |
2651 | struct internal_syment *syms; | |
2652 | asection **sections; | |
2653 | { | |
2654 | struct internal_reloc *rel; | |
2655 | struct internal_reloc *relend; | |
2656 | ||
2657 | rel = relocs; | |
2658 | relend = rel + input_section->reloc_count; | |
2659 | for (; rel < relend; rel++) | |
2660 | { | |
2661 | long symndx; | |
2662 | struct coff_link_hash_entry *h; | |
2663 | struct internal_syment *sym; | |
2664 | bfd_vma addend; | |
2665 | bfd_vma val; | |
2666 | reloc_howto_type *howto; | |
2667 | bfd_reloc_status_type rstat; | |
2668 | ||
2669 | symndx = rel->r_symndx; | |
2670 | ||
2671 | if (symndx == -1) | |
2672 | { | |
2673 | h = NULL; | |
2674 | sym = NULL; | |
2675 | } | |
75987f83 ILT |
2676 | else if (symndx < 0 |
2677 | || (unsigned long) symndx >= obj_raw_syment_count (input_bfd)) | |
2678 | { | |
2679 | (*_bfd_error_handler) | |
2680 | ("%s: illegal symbol index %ld in relocs", | |
2681 | bfd_get_filename (input_bfd), symndx); | |
2682 | return false; | |
2683 | } | |
252b5132 RH |
2684 | else |
2685 | { | |
2686 | h = obj_coff_sym_hashes (input_bfd)[symndx]; | |
2687 | sym = syms + symndx; | |
2688 | } | |
2689 | ||
2690 | /* COFF treats common symbols in one of two ways. Either the | |
2691 | size of the symbol is included in the section contents, or it | |
2692 | is not. We assume that the size is not included, and force | |
2693 | the rtype_to_howto function to adjust the addend as needed. */ | |
2694 | ||
2695 | if (sym != NULL && sym->n_scnum != 0) | |
2696 | addend = - sym->n_value; | |
2697 | else | |
2698 | addend = 0; | |
2699 | ||
2700 | ||
2701 | howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, | |
2702 | sym, &addend); | |
2703 | if (howto == NULL) | |
2704 | return false; | |
2705 | ||
2706 | /* If we are doing a relocateable link, then we can just ignore | |
2707 | a PC relative reloc that is pcrel_offset. It will already | |
2708 | have the correct value. If this is not a relocateable link, | |
2709 | then we should ignore the symbol value. */ | |
2710 | if (howto->pc_relative && howto->pcrel_offset) | |
2711 | { | |
2712 | if (info->relocateable) | |
2713 | continue; | |
2714 | if (sym != NULL && sym->n_scnum != 0) | |
2715 | addend += sym->n_value; | |
2716 | } | |
2717 | ||
2718 | val = 0; | |
2719 | ||
2720 | if (h == NULL) | |
2721 | { | |
2722 | asection *sec; | |
2723 | ||
2724 | if (symndx == -1) | |
2725 | { | |
2726 | sec = bfd_abs_section_ptr; | |
2727 | val = 0; | |
2728 | } | |
2729 | else | |
2730 | { | |
2731 | sec = sections[symndx]; | |
2732 | val = (sec->output_section->vma | |
2733 | + sec->output_offset | |
2734 | + sym->n_value); | |
2735 | if (! obj_pe (input_bfd)) | |
2736 | val -= sec->vma; | |
2737 | } | |
2738 | } | |
2739 | else | |
2740 | { | |
2741 | if (h->root.type == bfd_link_hash_defined | |
2742 | || h->root.type == bfd_link_hash_defweak) | |
2743 | { | |
2744 | asection *sec; | |
2745 | ||
2746 | sec = h->root.u.def.section; | |
2747 | val = (h->root.u.def.value | |
2748 | + sec->output_section->vma | |
2749 | + sec->output_offset); | |
2750 | } | |
2751 | ||
2752 | else if (! info->relocateable) | |
2753 | { | |
2754 | if (! ((*info->callbacks->undefined_symbol) | |
2755 | (info, h->root.root.string, input_bfd, input_section, | |
2756 | rel->r_vaddr - input_section->vma))) | |
2757 | return false; | |
2758 | } | |
2759 | } | |
2760 | ||
2761 | if (info->base_file) | |
2762 | { | |
2763 | /* Emit a reloc if the backend thinks it needs it. */ | |
2764 | if (sym && pe_data (output_bfd)->in_reloc_p (output_bfd, howto)) | |
2765 | { | |
2766 | /* Relocation to a symbol in a section which isn't | |
2767 | absolute. We output the address here to a file. | |
2768 | This file is then read by dlltool when generating the | |
2769 | reloc section. Note that the base file is not | |
2770 | portable between systems. We write out a long here, | |
2771 | and dlltool reads in a long. */ | |
2772 | long addr = (rel->r_vaddr | |
2773 | - input_section->vma | |
2774 | + input_section->output_offset | |
2775 | + input_section->output_section->vma); | |
2776 | if (coff_data (output_bfd)->pe) | |
2777 | addr -= pe_data(output_bfd)->pe_opthdr.ImageBase; | |
2778 | if (fwrite (&addr, 1, sizeof (long), (FILE *) info->base_file) | |
2779 | != sizeof (long)) | |
2780 | { | |
2781 | bfd_set_error (bfd_error_system_call); | |
2782 | return false; | |
2783 | } | |
2784 | } | |
2785 | } | |
2786 | ||
2787 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2788 | contents, | |
2789 | rel->r_vaddr - input_section->vma, | |
2790 | val, addend); | |
2791 | ||
2792 | switch (rstat) | |
2793 | { | |
2794 | default: | |
2795 | abort (); | |
2796 | case bfd_reloc_ok: | |
2797 | break; | |
2798 | case bfd_reloc_outofrange: | |
2799 | (*_bfd_error_handler) | |
2800 | (_("%s: bad reloc address 0x%lx in section `%s'"), | |
2801 | bfd_get_filename (input_bfd), | |
2802 | (unsigned long) rel->r_vaddr, | |
2803 | bfd_get_section_name (input_bfd, input_section)); | |
2804 | return false; | |
2805 | case bfd_reloc_overflow: | |
2806 | { | |
2807 | const char *name; | |
2808 | char buf[SYMNMLEN + 1]; | |
2809 | ||
2810 | if (symndx == -1) | |
2811 | name = "*ABS*"; | |
2812 | else if (h != NULL) | |
2813 | name = h->root.root.string; | |
2814 | else | |
2815 | { | |
2816 | name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); | |
2817 | if (name == NULL) | |
2818 | return false; | |
2819 | } | |
2820 | ||
2821 | if (! ((*info->callbacks->reloc_overflow) | |
2822 | (info, name, howto->name, (bfd_vma) 0, input_bfd, | |
2823 | input_section, rel->r_vaddr - input_section->vma))) | |
2824 | return false; | |
2825 | } | |
2826 | } | |
2827 | } | |
2828 | return true; | |
2829 | } | |
2830 |