Commit | Line | Data |
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2fa0b342 | 1 | /* Copyright (C) 1991 Free Software Foundation, Inc. |
ce4d59e2 | 2 | Written by Steve Chamberlain steve@cygnus.com |
2fa0b342 DHW |
3 | |
4 | This file is part of GLD, the Gnu Linker. | |
5 | ||
6 | GLD is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
ce4d59e2 | 8 | the Free Software Foundation; either version 2, or (at your option) |
2fa0b342 DHW |
9 | any later version. |
10 | ||
11 | GLD is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GLD; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | /* | |
2fa0b342 | 21 | * $Id$ |
2fa0b342 DHW |
22 | */ |
23 | ||
2fa0b342 | 24 | #include "bfd.h" |
f177a611 | 25 | #include "sysdep.h" |
2fa0b342 DHW |
26 | |
27 | #include "config.h" | |
28 | #include "ld.h" | |
29 | #include "ldmain.h" | |
30 | #include "ldmisc.h" | |
31 | #include "ldwrite.h" | |
32 | #include "ldgram.h" | |
33 | #include "ldsym.h" | |
34 | #include "ldlang.h" | |
8c514453 | 35 | #include "ldemul.h" |
2fa0b342 DHW |
36 | #include "ldlex.h" |
37 | #include "ldfile.h" | |
c611e285 SC |
38 | #include "ldindr.h" |
39 | #include "ldwarn.h" | |
40 | #include "ldctor.h" | |
9d1fe8a4 SC |
41 | #include "lderror.h" |
42 | ||
2fa0b342 DHW |
43 | /* IMPORTS */ |
44 | extern boolean lang_has_input_file; | |
1418c83b | 45 | extern boolean trace_files; |
2fa0b342 DHW |
46 | /* EXPORTS */ |
47 | ||
48 | char *default_target; | |
49 | char *output_filename = "a.out"; | |
50 | /* Name this program was invoked by. */ | |
51 | char *program_name; | |
52 | ||
53 | /* The file that we're creating */ | |
b6316534 | 54 | bfd *output_bfd = 0; |
2fa0b342 DHW |
55 | |
56 | extern boolean option_v; | |
57 | ||
58 | /* The local symbol prefix */ | |
59 | char lprefix = 'L'; | |
60 | ||
61 | /* Count the number of global symbols multiply defined. */ | |
62 | int multiple_def_count; | |
63 | ||
64 | ||
65 | /* Count the number of symbols defined through common declarations. | |
66 | This count is referenced in symdef_library, linear_library, and | |
67 | modified by enter_global_ref. | |
68 | ||
69 | It is incremented when a symbol is created as a common, and | |
70 | decremented when the common declaration is overridden | |
71 | ||
72 | Another way of thinking of it is that this is a count of | |
3e4c643d | 73 | all ldsym_types with a ->scoms field */ |
2fa0b342 | 74 | |
3e4c643d | 75 | unsigned int commons_pending; |
2fa0b342 DHW |
76 | |
77 | /* Count the number of global symbols referenced and not defined. | |
3e4c643d | 78 | common symbols are not included in this count. */ |
2fa0b342 DHW |
79 | |
80 | unsigned int undefined_global_sym_count; | |
81 | ||
82 | ||
83 | ||
84 | /* Count the number of warning symbols encountered. */ | |
85 | int warning_count; | |
86 | ||
87 | /* have we had a load script ? */ | |
88 | extern boolean had_script; | |
89 | ||
2fa0b342 DHW |
90 | /* Nonzero means print names of input files as processed. */ |
91 | boolean trace_files; | |
92 | ||
93 | ||
94 | ||
95 | /* 1 => write load map. */ | |
96 | boolean write_map; | |
97 | ||
98 | ||
99 | int unix_relocate; | |
81016051 SC |
100 | #ifdef GNU960 |
101 | /* Indicates whether output file will be b.out (default) or coff */ | |
f177a611 | 102 | enum target_flavour output_flavor = BFD_BOUT_FORMAT; |
81016051 | 103 | #endif |
2fa0b342 | 104 | |
2fa0b342 DHW |
105 | /* Force the make_executable to be output, even if there are non-fatal |
106 | errors */ | |
107 | boolean force_make_executable; | |
108 | ||
2fa0b342 DHW |
109 | /* A count of the total number of local symbols ever seen - by adding |
110 | the symbol_count field of each newly read afile.*/ | |
111 | ||
2fa0b342 DHW |
112 | unsigned int total_symbols_seen; |
113 | ||
114 | /* A count of the number of read files - the same as the number of elements | |
115 | in file_chain | |
116 | */ | |
117 | unsigned int total_files_seen; | |
118 | ||
c611e285 | 119 | |
2fa0b342 DHW |
120 | /* IMPORTS */ |
121 | args_type command_line; | |
122 | ld_config_type config; | |
9d1fe8a4 | 123 | void |
2fa0b342 DHW |
124 | main (argc, argv) |
125 | char **argv; | |
126 | int argc; | |
127 | { | |
128 | char *emulation; | |
129 | program_name = argv[0]; | |
130 | output_filename = "a.out"; | |
99fe4553 | 131 | |
3e4c643d | 132 | bfd_init(); |
bfbdc80f | 133 | |
99fe4553 | 134 | #ifdef GNU960 |
870f54b2 SC |
135 | { |
136 | int i; | |
81016051 | 137 | |
870f54b2 | 138 | check_v960( argc, argv ); |
fe563ffe | 139 | emulation = "gld960"; |
870f54b2 SC |
140 | for ( i = 1; i < argc; i++ ){ |
141 | if ( !strcmp(argv[i],"-Fcoff") ){ | |
fe563ffe | 142 | emulation = "lnk960"; |
870f54b2 SC |
143 | output_flavor = BFD_COFF_FORMAT; |
144 | break; | |
145 | } | |
146 | } | |
147 | } | |
81016051 | 148 | #else |
870f54b2 | 149 | emulation = (char *) getenv(EMULATION_ENVIRON); |
99fe4553 SC |
150 | #endif |
151 | ||
2fa0b342 | 152 | /* Initialize the data about options. */ |
76855794 | 153 | |
9d1fe8a4 | 154 | |
2fa0b342 | 155 | trace_files = false; |
2fa0b342 DHW |
156 | write_map = false; |
157 | config.relocateable_output = false; | |
158 | unix_relocate = 0; | |
159 | command_line.force_common_definition = false; | |
160 | ||
c611e285 | 161 | init_bfd_error_vector(); |
bfbdc80f | 162 | ldsym_init(); |
2fa0b342 | 163 | ldfile_add_arch(""); |
8cb5eb31 | 164 | ldfile_add_library_path("./"); |
2fa0b342 DHW |
165 | config.make_executable = true; |
166 | force_make_executable = false; | |
167 | ||
168 | ||
169 | /* Initialize the cumulative counts of symbols. */ | |
170 | undefined_global_sym_count = 0; | |
171 | warning_count = 0; | |
172 | multiple_def_count = 0; | |
173 | commons_pending = 0; | |
174 | ||
ce4d59e2 SC |
175 | config.magic_demand_paged = true; |
176 | config.text_read_only = true; | |
2fa0b342 | 177 | config.make_executable = true; |
2fa0b342 | 178 | if (emulation == (char *)NULL) { |
870f54b2 SC |
179 | emulation= DEFAULT_EMULATION; |
180 | } | |
1418c83b | 181 | |
2fa0b342 | 182 | ldemul_choose_mode(emulation); |
2fa0b342 | 183 | default_target = ldemul_choose_target(); |
2fa0b342 DHW |
184 | lang_init(); |
185 | ldemul_before_parse(); | |
2fa0b342 DHW |
186 | lang_has_input_file = false; |
187 | parse_args(argc, argv); | |
1418c83b | 188 | lang_final(); |
9d1fe8a4 | 189 | |
1418c83b | 190 | if (trace_files) { |
9d1fe8a4 | 191 | |
870f54b2 | 192 | info("%P: mode %s\n", emulation); |
9d1fe8a4 | 193 | |
870f54b2 | 194 | } |
2fa0b342 | 195 | if (lang_has_input_file == false) { |
870f54b2 SC |
196 | einfo("%P%F: No input files\n"); |
197 | } | |
2fa0b342 DHW |
198 | |
199 | ldemul_after_parse(); | |
870f54b2 | 200 | |
9d1fe8a4 | 201 | |
870f54b2 SC |
202 | if (config.map_filename) |
203 | { | |
fe563ffe | 204 | if (strcmp(config.map_filename, "-") == 0) |
870f54b2 SC |
205 | { |
206 | config.map_file = stdout; | |
207 | } | |
208 | else { | |
2e2bf962 SC |
209 | config.map_file = fopen(config.map_filename, FOPEN_WT); |
210 | if (config.map_file == (FILE *)NULL) | |
211 | { | |
212 | einfo("%P%F: can't open map file %s\n", | |
213 | config.map_filename); | |
214 | } | |
215 | } | |
870f54b2 SC |
216 | } |
217 | ||
2e2bf962 | 218 | |
2fa0b342 DHW |
219 | lang_process(); |
220 | ||
2fa0b342 DHW |
221 | /* Print error messages for any missing symbols, for any warning |
222 | symbols, and possibly multiple definitions */ | |
223 | ||
2fa0b342 | 224 | |
bfbdc80f SC |
225 | if (config.text_read_only) |
226 | { | |
227 | /* Look for a text section and mark the readonly attribute in it */ | |
228 | asection *found = bfd_get_section_by_name(output_bfd, ".text"); | |
229 | if (found != (asection *)NULL) { | |
870f54b2 | 230 | found->flags |= SEC_READONLY; |
3e4c643d | 231 | } |
bfbdc80f | 232 | } |
2fa0b342 DHW |
233 | |
234 | if (config.relocateable_output) { | |
870f54b2 | 235 | output_bfd->flags &= ~EXEC_P; |
c611e285 | 236 | |
870f54b2 SC |
237 | ldwrite(); |
238 | bfd_close(output_bfd); | |
239 | } | |
2fa0b342 | 240 | else { |
870f54b2 | 241 | output_bfd->flags |= EXEC_P; |
2fa0b342 | 242 | |
870f54b2 | 243 | ldwrite(); |
c611e285 | 244 | |
870f54b2 | 245 | if (config.make_executable == false && force_make_executable ==false) { |
c611e285 | 246 | |
870f54b2 SC |
247 | unlink(output_filename); |
248 | } | |
249 | else { bfd_close(output_bfd); }; | |
fe563ffe | 250 | exit (!config.make_executable); |
2fa0b342 | 251 | } |
2fa0b342 | 252 | |
fe563ffe | 253 | exit(0); |
870f54b2 | 254 | } /* main() */ |
2fa0b342 DHW |
255 | |
256 | ||
257 | void | |
258 | Q_read_entry_symbols (desc, entry) | |
259 | bfd *desc; | |
260 | struct lang_input_statement_struct *entry; | |
261 | { | |
262 | if (entry->asymbols == (asymbol **)NULL) { | |
81016051 | 263 | bfd_size_type table_size = get_symtab_upper_bound(desc); |
2fa0b342 | 264 | entry->asymbols = (asymbol **)ldmalloc(table_size); |
2fa0b342 DHW |
265 | entry->symbol_count = bfd_canonicalize_symtab(desc, entry->asymbols) ; |
266 | } | |
267 | } | |
268 | ||
269 | ||
270 | /* | |
271 | * turn this item into a reference | |
272 | */ | |
273 | static void | |
274 | refize(sp, nlist_p) | |
275 | ldsym_type *sp; | |
276 | asymbol **nlist_p; | |
277 | { | |
278 | asymbol *sym = *nlist_p; | |
279 | sym->value = 0; | |
c611e285 SC |
280 | sym->flags = 0; |
281 | sym->section = &bfd_und_section; | |
99fe4553 | 282 | sym->udata =(PTR)( sp->srefs_chain); |
2fa0b342 DHW |
283 | sp->srefs_chain = nlist_p; |
284 | } | |
285 | /* | |
286 | This function is called for each name which is seen which has a global | |
287 | scope. It enters the name into the global symbol table in the correct | |
288 | symbol on the correct chain. Remember that each ldsym_type has three | |
289 | chains attatched, one of all definitions of a symbol, one of all | |
290 | references of a symbol and one of all common definitions of a symbol. | |
291 | ||
292 | When the function is over, the supplied is left connected to the bfd | |
293 | to which is was born, with its udata field pointing to the next member | |
294 | on the chain in which it has been inserted. | |
295 | ||
296 | A certain amount of jigery pokery is necessary since commons come | |
297 | along and upset things, we only keep one item in the common chain; the | |
298 | one with the biggest size seen sofar. When another common comes along | |
299 | it either bumps the previous definition into the ref chain, since it | |
300 | is bigger, or gets turned into a ref on the spot since the one on the | |
301 | common chain is already bigger. If a real definition comes along then | |
302 | the common gets bumped off anyway. | |
303 | ||
304 | Whilst all this is going on we keep a count of the number of multiple | |
305 | definitions seen, undefined global symbols and pending commons. | |
306 | */ | |
307 | ||
c611e285 | 308 | extern boolean relaxing; |
2fa0b342 DHW |
309 | |
310 | void | |
311 | Q_enter_global_ref (nlist_p) | |
312 | asymbol **nlist_p; | |
313 | ||
314 | { | |
315 | asymbol *sym = *nlist_p; | |
99fe4553 | 316 | CONST char *name = sym->name; |
2fa0b342 DHW |
317 | ldsym_type *sp = ldsym_get (name); |
318 | ||
319 | flagword this_symbol_flags = sym->flags; | |
320 | ||
321 | ||
322 | ASSERT(sym->udata == 0); | |
323 | ||
3e4c643d | 324 | |
81016051 | 325 | if (flag_is_constructor(this_symbol_flags)) { |
3e4c643d SC |
326 | /* Add this constructor to the list we keep */ |
327 | ldlang_add_constructor(sp); | |
328 | /* Turn any commons into refs */ | |
329 | if (sp->scoms_chain != (asymbol **)NULL) { | |
330 | refize(sp, sp->scoms_chain); | |
331 | sp->scoms_chain = 0; | |
332 | } | |
333 | ||
81016051 SC |
334 | |
335 | } | |
336 | else { | |
c611e285 | 337 | if (sym->section == &bfd_com_section) { |
81016051 | 338 | /* If we have a definition of this symbol already then |
3e4c643d SC |
339 | this common turns into a reference. Also we only |
340 | ever point to the largest common, so if we | |
341 | have a common, but it's bigger that the new symbol | |
342 | the turn this into a reference too. */ | |
81016051 SC |
343 | if (sp->sdefs_chain) |
344 | { | |
345 | /* This is a common symbol, but we already have a definition | |
346 | for it, so just link it into the ref chain as if | |
3e4c643d | 347 | it were a reference */ |
81016051 SC |
348 | refize(sp, nlist_p); |
349 | } | |
350 | else if (sp->scoms_chain) { | |
351 | /* If we have a previous common, keep only the biggest */ | |
352 | if ( (*(sp->scoms_chain))->value > sym->value) { | |
353 | /* other common is bigger, throw this one away */ | |
354 | refize(sp, nlist_p); | |
355 | } | |
356 | else if (sp->scoms_chain != nlist_p) { | |
357 | /* other common is smaller, throw that away */ | |
358 | refize(sp, sp->scoms_chain); | |
359 | sp->scoms_chain = nlist_p; | |
360 | } | |
2fa0b342 | 361 | } |
81016051 | 362 | else { |
3e4c643d SC |
363 | /* This is the first time we've seen a common, so remember it |
364 | - if it was undefined before, we know it's defined now. If | |
365 | the symbol has been marked as really being a constructor, | |
366 | then treat this as a ref | |
367 | */ | |
368 | if (sp->flags & SYM_CONSTRUCTOR) { | |
369 | /* Turn this into a ref */ | |
370 | refize(sp, nlist_p); | |
371 | } | |
372 | else { | |
373 | /* treat like a common */ | |
374 | if (sp->srefs_chain) | |
375 | undefined_global_sym_count--; | |
376 | ||
377 | commons_pending++; | |
378 | sp->scoms_chain = nlist_p; | |
379 | } | |
2fa0b342 DHW |
380 | } |
381 | } | |
2fa0b342 | 382 | |
c611e285 | 383 | else if (sym->section != &bfd_und_section) { |
81016051 SC |
384 | /* This is the definition of a symbol, add to def chain */ |
385 | if (sp->sdefs_chain && (*(sp->sdefs_chain))->section != sym->section) { | |
386 | /* Multiple definition */ | |
387 | asymbol *sy = *(sp->sdefs_chain); | |
388 | lang_input_statement_type *stat = (lang_input_statement_type *) sy->the_bfd->usrdata; | |
389 | lang_input_statement_type *stat1 = (lang_input_statement_type *) sym->the_bfd->usrdata; | |
390 | asymbol ** stat1_symbols = stat1 ? stat1->asymbols: 0; | |
391 | asymbol ** stat_symbols = stat ? stat->asymbols:0; | |
2fa0b342 | 392 | |
81016051 | 393 | multiple_def_count++; |
c611e285 SC |
394 | einfo("%C: multiple definition of `%T'\n", |
395 | sym->the_bfd, sym->section, stat1_symbols, sym->value, sym); | |
2fa0b342 | 396 | |
c611e285 SC |
397 | einfo("%C: first seen here\n", |
398 | sy->the_bfd, sy->section, stat_symbols, sy->value); | |
81016051 SC |
399 | } |
400 | else { | |
401 | sym->udata =(PTR)( sp->sdefs_chain); | |
402 | sp->sdefs_chain = nlist_p; | |
403 | } | |
404 | /* A definition overrides a common symbol */ | |
405 | if (sp->scoms_chain) { | |
406 | refize(sp, sp->scoms_chain); | |
407 | sp->scoms_chain = 0; | |
408 | commons_pending--; | |
409 | } | |
c611e285 | 410 | else if (sp->srefs_chain && relaxing == false) { |
81016051 SC |
411 | /* If previously was undefined, then remember as defined */ |
412 | undefined_global_sym_count--; | |
413 | } | |
2fa0b342 DHW |
414 | } |
415 | else { | |
81016051 SC |
416 | if (sp->scoms_chain == (asymbol **)NULL |
417 | && sp->srefs_chain == (asymbol **)NULL | |
418 | && sp->sdefs_chain == (asymbol **)NULL) { | |
419 | /* And it's the first time we've seen it */ | |
420 | undefined_global_sym_count++; | |
2fa0b342 | 421 | |
81016051 | 422 | } |
2fa0b342 | 423 | |
81016051 SC |
424 | refize(sp, nlist_p); |
425 | } | |
2fa0b342 DHW |
426 | } |
427 | ||
428 | ASSERT(sp->sdefs_chain == 0 || sp->scoms_chain == 0); | |
429 | ASSERT(sp->scoms_chain ==0 || (*(sp->scoms_chain))->udata == 0); | |
430 | ||
431 | ||
432 | } | |
433 | ||
434 | static void | |
435 | Q_enter_file_symbols (entry) | |
436 | lang_input_statement_type *entry; | |
437 | { | |
438 | asymbol **q ; | |
c611e285 | 439 | |
2fa0b342 | 440 | entry->common_section = |
fe563ffe | 441 | bfd_make_section_old_way(entry->the_bfd, "COMMON"); |
2fa0b342 DHW |
442 | |
443 | ldlang_add_file(entry); | |
444 | ||
445 | ||
446 | if (trace_files || option_v) { | |
fe563ffe SC |
447 | info("%I\n", entry); |
448 | } | |
2fa0b342 DHW |
449 | |
450 | total_symbols_seen += entry->symbol_count; | |
451 | total_files_seen ++; | |
452 | for (q = entry->asymbols; *q; q++) | |
fe563ffe SC |
453 | { |
454 | asymbol *p = *q; | |
455 | ||
456 | if (p->flags & BSF_INDIRECT) | |
2fa0b342 | 457 | { |
fe563ffe SC |
458 | add_indirect(q); |
459 | } | |
460 | else if (p->flags & BSF_WARNING) | |
461 | { | |
462 | add_warning(p); | |
463 | } | |
2fa0b342 | 464 | |
fe563ffe SC |
465 | else if (p->section == &bfd_und_section |
466 | || (p->flags & BSF_GLOBAL) | |
467 | || p->section == &bfd_com_section | |
468 | || (p->flags & BSF_CONSTRUCTOR)) | |
469 | { | |
470 | Q_enter_global_ref(q); | |
471 | } | |
81016051 | 472 | |
c611e285 | 473 | |
fe563ffe | 474 | } |
2fa0b342 DHW |
475 | } |
476 | ||
477 | ||
478 | ||
479 | /* Searching libraries */ | |
480 | ||
481 | struct lang_input_statement_struct *decode_library_subfile (); | |
482 | void linear_library (), symdef_library (); | |
483 | ||
484 | /* Search the library ENTRY, already open on descriptor DESC. | |
485 | This means deciding which library members to load, | |
486 | making a chain of `struct lang_input_statement_struct' for those members, | |
487 | and entering their global symbols in the hash table. */ | |
488 | ||
489 | void | |
490 | search_library (entry) | |
491 | struct lang_input_statement_struct *entry; | |
492 | { | |
493 | ||
494 | /* No need to load a library if no undefined symbols */ | |
495 | if (!undefined_global_sym_count) return; | |
496 | ||
497 | if (bfd_has_map(entry->the_bfd)) | |
498 | symdef_library (entry); | |
499 | else | |
500 | linear_library (entry); | |
501 | ||
502 | } | |
503 | ||
504 | ||
99fe4553 SC |
505 | #ifdef GNU960 |
506 | static | |
507 | boolean | |
508 | gnu960_check_format (abfd, format) | |
509 | bfd *abfd; | |
510 | bfd_format format; | |
511 | { | |
512 | boolean retval; | |
513 | ||
81016051 SC |
514 | if ((bfd_check_format(abfd,format) == true) |
515 | && (abfd->xvec->flavour == output_flavor) ){ | |
516 | return true; | |
99fe4553 | 517 | } |
81016051 SC |
518 | |
519 | ||
99fe4553 SC |
520 | return false; |
521 | } | |
522 | #endif | |
523 | ||
2fa0b342 | 524 | void |
1418c83b | 525 | ldmain_open_file_read_symbol (entry) |
2fa0b342 DHW |
526 | struct lang_input_statement_struct *entry; |
527 | { | |
528 | if (entry->asymbols == (asymbol **)NULL | |
529 | &&entry->real == true | |
530 | && entry->filename != (char *)NULL) | |
531 | { | |
532 | ldfile_open_file (entry); | |
533 | ||
ce4d59e2 | 534 | |
99fe4553 SC |
535 | #ifdef GNU960 |
536 | if (gnu960_check_format(entry->the_bfd, bfd_object)) | |
537 | #else | |
2fa0b342 | 538 | if (bfd_check_format(entry->the_bfd, bfd_object)) |
99fe4553 | 539 | #endif |
2fa0b342 | 540 | { |
99fe4553 | 541 | entry->the_bfd->usrdata = (PTR)entry; |
2fa0b342 DHW |
542 | |
543 | ||
544 | Q_read_entry_symbols (entry->the_bfd, entry); | |
ce4d59e2 SC |
545 | |
546 | /* look through the sections in the file and see if any of them | |
547 | are constructors */ | |
548 | ldlang_check_for_constructors (entry); | |
549 | ||
2fa0b342 DHW |
550 | Q_enter_file_symbols (entry); |
551 | } | |
99fe4553 SC |
552 | #ifdef GNU960 |
553 | else if (gnu960_check_format(entry->the_bfd, bfd_archive)) | |
554 | #else | |
2fa0b342 | 555 | else if (bfd_check_format(entry->the_bfd, bfd_archive)) |
99fe4553 | 556 | #endif |
2fa0b342 | 557 | { |
99fe4553 | 558 | entry->the_bfd->usrdata = (PTR)entry; |
2fa0b342 DHW |
559 | |
560 | entry->subfiles = (lang_input_statement_type *)NULL; | |
561 | search_library (entry); | |
562 | } | |
563 | else | |
564 | { | |
c611e285 SC |
565 | einfo("%F%B: malformed input file (not rel or archive) \n", |
566 | entry->the_bfd); | |
2fa0b342 DHW |
567 | } |
568 | } | |
569 | ||
570 | } | |
571 | ||
572 | ||
573 | /* Construct and return a lang_input_statement_struct for a library member. | |
574 | The library's lang_input_statement_struct is library_entry, | |
575 | and the library is open on DESC. | |
576 | SUBFILE_OFFSET is the byte index in the library of this member's header. | |
577 | We store the length of the member into *LENGTH_LOC. */ | |
578 | ||
579 | lang_input_statement_type * | |
580 | decode_library_subfile (library_entry, subfile_offset) | |
581 | struct lang_input_statement_struct *library_entry; | |
582 | bfd *subfile_offset; | |
583 | { | |
584 | register struct lang_input_statement_struct *subentry; | |
81016051 | 585 | subentry = (struct lang_input_statement_struct *) ldmalloc ((bfd_size_type)(sizeof (struct lang_input_statement_struct))); |
2fa0b342 DHW |
586 | subentry->filename = subfile_offset -> filename; |
587 | subentry->local_sym_name = subfile_offset->filename; | |
588 | subentry->asymbols = 0; | |
589 | subentry->the_bfd = subfile_offset; | |
590 | subentry->subfiles = 0; | |
591 | subentry->next = 0; | |
592 | subentry->superfile = library_entry; | |
593 | subentry->is_archive = false; | |
1418c83b | 594 | |
2fa0b342 DHW |
595 | subentry->just_syms_flag = false; |
596 | subentry->loaded = false; | |
597 | subentry->chain = 0; | |
598 | ||
599 | return subentry; | |
600 | } | |
601 | ||
602 | boolean subfile_wanted_p (); | |
603 | void | |
604 | clear_syms(entry, offset) | |
605 | struct lang_input_statement_struct *entry; | |
606 | file_ptr offset; | |
607 | { | |
608 | carsym *car; | |
609 | unsigned long indx = bfd_get_next_mapent(entry->the_bfd, | |
610 | BFD_NO_MORE_SYMBOLS, | |
611 | &car); | |
612 | while (indx != BFD_NO_MORE_SYMBOLS) { | |
613 | if (car->file_offset == offset) { | |
614 | car->name = 0; | |
615 | } | |
616 | indx = bfd_get_next_mapent(entry->the_bfd, indx, &car); | |
617 | } | |
618 | ||
619 | } | |
620 | ||
621 | /* Search a library that has a map | |
622 | */ | |
623 | void | |
624 | symdef_library (entry) | |
625 | struct lang_input_statement_struct *entry; | |
626 | ||
627 | { | |
628 | register struct lang_input_statement_struct *prev = 0; | |
629 | ||
630 | boolean not_finished = true; | |
631 | ||
632 | ||
633 | while (not_finished == true) | |
3e4c643d SC |
634 | { |
635 | carsym *exported_library_name; | |
636 | bfd *prev_archive_member_bfd = 0; | |
2fa0b342 | 637 | |
3e4c643d SC |
638 | int idx = bfd_get_next_mapent(entry->the_bfd, |
639 | BFD_NO_MORE_SYMBOLS, | |
640 | &exported_library_name); | |
2fa0b342 | 641 | |
3e4c643d | 642 | not_finished = false; |
2fa0b342 | 643 | |
3e4c643d | 644 | while (idx != BFD_NO_MORE_SYMBOLS && undefined_global_sym_count) |
2fa0b342 DHW |
645 | { |
646 | ||
3e4c643d SC |
647 | if (exported_library_name->name) |
648 | { | |
2fa0b342 | 649 | |
3e4c643d SC |
650 | ldsym_type *sp = ldsym_get_soft (exported_library_name->name); |
651 | ||
652 | /* If we find a symbol that appears to be needed, think carefully | |
653 | about the archive member that the symbol is in. */ | |
654 | /* So - if it exists, and is referenced somewhere and is | |
655 | undefined or */ | |
656 | if (sp && sp->srefs_chain && !sp->sdefs_chain) | |
657 | { | |
658 | bfd *archive_member_bfd = bfd_get_elt_at_index(entry->the_bfd, idx); | |
659 | struct lang_input_statement_struct *archive_member_lang_input_statement_struct; | |
2fa0b342 | 660 | |
99fe4553 | 661 | #ifdef GNU960 |
3e4c643d | 662 | if (archive_member_bfd && gnu960_check_format(archive_member_bfd, bfd_object)) |
99fe4553 | 663 | #else |
3e4c643d | 664 | if (archive_member_bfd && bfd_check_format(archive_member_bfd, bfd_object)) |
99fe4553 | 665 | #endif |
3e4c643d | 666 | { |
2fa0b342 | 667 | |
3e4c643d SC |
668 | /* Don't think carefully about any archive member |
669 | more than once in a given pass. */ | |
670 | if (prev_archive_member_bfd != archive_member_bfd) | |
671 | { | |
2fa0b342 | 672 | |
3e4c643d | 673 | prev_archive_member_bfd = archive_member_bfd; |
2fa0b342 | 674 | |
3e4c643d | 675 | /* Read the symbol table of the archive member. */ |
2fa0b342 | 676 | |
3e4c643d | 677 | if (archive_member_bfd->usrdata != (PTR)NULL) { |
2fa0b342 | 678 | |
3e4c643d SC |
679 | archive_member_lang_input_statement_struct =(lang_input_statement_type *) archive_member_bfd->usrdata; |
680 | } | |
681 | else { | |
2fa0b342 | 682 | |
3e4c643d SC |
683 | archive_member_lang_input_statement_struct = |
684 | decode_library_subfile (entry, archive_member_bfd); | |
685 | archive_member_bfd->usrdata = (PTR) archive_member_lang_input_statement_struct; | |
2fa0b342 | 686 | |
3e4c643d | 687 | } |
2fa0b342 | 688 | |
3e4c643d | 689 | if (archive_member_lang_input_statement_struct == 0) { |
c611e285 SC |
690 | einfo ("%F%I contains invalid archive member %s\n", |
691 | entry, sp->name); | |
3e4c643d | 692 | } |
2fa0b342 | 693 | |
3e4c643d SC |
694 | if (archive_member_lang_input_statement_struct->loaded == false) |
695 | { | |
2fa0b342 | 696 | |
3e4c643d SC |
697 | Q_read_entry_symbols (archive_member_bfd, archive_member_lang_input_statement_struct); |
698 | /* Now scan the symbol table and decide whether to load. */ | |
2fa0b342 DHW |
699 | |
700 | ||
3e4c643d | 701 | if (subfile_wanted_p (archive_member_lang_input_statement_struct) == true) |
2fa0b342 | 702 | |
3e4c643d SC |
703 | { |
704 | /* This member is needed; load it. | |
705 | Since we are loading something on this pass, | |
706 | we must make another pass through the symdef data. */ | |
2fa0b342 | 707 | |
3e4c643d | 708 | not_finished = true; |
2fa0b342 | 709 | |
3e4c643d | 710 | Q_enter_file_symbols (archive_member_lang_input_statement_struct); |
2fa0b342 | 711 | |
3e4c643d SC |
712 | if (prev) |
713 | prev->chain = archive_member_lang_input_statement_struct; | |
714 | else | |
715 | entry->subfiles = archive_member_lang_input_statement_struct; | |
2fa0b342 DHW |
716 | |
717 | ||
3e4c643d | 718 | prev = archive_member_lang_input_statement_struct; |
2fa0b342 DHW |
719 | |
720 | ||
3e4c643d SC |
721 | /* Clear out this member's symbols from the symdef data |
722 | so that following passes won't waste time on them. */ | |
723 | clear_syms(entry, exported_library_name->file_offset); | |
724 | archive_member_lang_input_statement_struct->loaded = true; | |
725 | } | |
726 | } | |
727 | } | |
2fa0b342 | 728 | } |
2fa0b342 | 729 | } |
3e4c643d SC |
730 | } |
731 | idx = bfd_get_next_mapent(entry->the_bfd, idx, &exported_library_name); | |
2fa0b342 | 732 | } |
3e4c643d | 733 | } |
2fa0b342 DHW |
734 | } |
735 | ||
736 | void | |
737 | linear_library (entry) | |
738 | struct lang_input_statement_struct *entry; | |
739 | { | |
740 | boolean more_to_do = true; | |
741 | register struct lang_input_statement_struct *prev = 0; | |
742 | ||
743 | while (more_to_do) { | |
744 | ||
745 | bfd * archive = bfd_openr_next_archived_file(entry->the_bfd,0); | |
746 | ||
747 | more_to_do = false; | |
748 | while (archive) { | |
99fe4553 SC |
749 | #ifdef GNU960 |
750 | if (gnu960_check_format(archive, bfd_object)) | |
751 | #else | |
2fa0b342 | 752 | if (bfd_check_format(archive, bfd_object)) |
99fe4553 | 753 | #endif |
2fa0b342 DHW |
754 | { |
755 | register struct lang_input_statement_struct *subentry; | |
756 | ||
757 | subentry = decode_library_subfile (entry, | |
758 | archive); | |
759 | ||
99fe4553 | 760 | archive->usrdata = (PTR) subentry; |
2fa0b342 DHW |
761 | if (!subentry) return; |
762 | if (subentry->loaded == false) { | |
763 | Q_read_entry_symbols (archive, subentry); | |
764 | ||
765 | if (subfile_wanted_p (subentry) == true) | |
766 | { | |
767 | Q_enter_file_symbols (subentry); | |
768 | ||
769 | if (prev) | |
770 | prev->chain = subentry; | |
771 | else | |
772 | entry->subfiles = subentry; | |
773 | prev = subentry; | |
774 | ||
775 | more_to_do = true; | |
776 | subentry->loaded = true; | |
777 | } | |
778 | } | |
779 | } | |
780 | archive = bfd_openr_next_archived_file(entry->the_bfd,archive); | |
781 | ||
782 | } | |
783 | ||
784 | } | |
785 | } | |
786 | ||
787 | /* ENTRY is an entry for a library member. | |
788 | Its symbols have been read into core, but not entered. | |
789 | Return nonzero if we ought to load this member. */ | |
790 | ||
791 | boolean | |
792 | subfile_wanted_p (entry) | |
793 | struct lang_input_statement_struct *entry; | |
794 | { | |
795 | asymbol **q; | |
796 | ||
797 | for (q = entry->asymbols; *q; q++) | |
798 | { | |
799 | asymbol *p = *q; | |
800 | ||
801 | /* If the symbol has an interesting definition, we could | |
802 | potentially want it. */ | |
803 | ||
3e4c643d SC |
804 | if (p->flags & BSF_INDIRECT) { |
805 | /* Grab out the name we've indirected to, and keep the insides | |
806 | */ | |
807 | add_indirect(q); | |
808 | } | |
809 | ||
c611e285 | 810 | if (p->section == &bfd_com_section |
9d1fe8a4 SC |
811 | || (p->flags & BSF_GLOBAL) |
812 | || (p->flags & BSF_INDIRECT)) | |
2fa0b342 DHW |
813 | { |
814 | register ldsym_type *sp = ldsym_get_soft (p->name); | |
815 | ||
816 | ||
817 | /* If this symbol has not been hashed, | |
818 | we can't be looking for it. */ | |
819 | if (sp != (ldsym_type *)NULL | |
820 | && sp->sdefs_chain == (asymbol **)NULL) { | |
821 | if (sp->srefs_chain != (asymbol **)NULL | |
822 | || sp->scoms_chain != (asymbol **)NULL) | |
823 | { | |
824 | /* This is a symbol we are looking for. It is either | |
825 | not yet defined or common. */ | |
826 | ||
c611e285 | 827 | if (p->section == &bfd_com_section) |
2fa0b342 | 828 | { |
3e4c643d SC |
829 | |
830 | /* If the symbol in the table is a constructor, we won't to | |
831 | anything fancy with it */ | |
832 | if ((sp->flags & SYM_CONSTRUCTOR) == 0) { | |
2fa0b342 DHW |
833 | /* This libary member has something to |
834 | say about this element. We should | |
835 | remember if its a new size */ | |
836 | /* Move something from the ref list to the com list */ | |
837 | if(sp->scoms_chain) { | |
838 | /* Already a common symbol, maybe update it */ | |
839 | if (p->value > (*(sp->scoms_chain))->value) { | |
840 | (*(sp->scoms_chain))->value = p->value; | |
841 | } | |
842 | } | |
843 | else { | |
844 | /* Take a value from the ref chain | |
845 | Here we are moving a symbol from the owning bfd | |
846 | to another bfd. We must set up the | |
847 | common_section portion of the bfd thing */ | |
848 | ||
849 | ||
850 | ||
851 | sp->scoms_chain = sp->srefs_chain; | |
852 | sp->srefs_chain = | |
853 | (asymbol **)((*(sp->srefs_chain))->udata); | |
99fe4553 | 854 | (*(sp->scoms_chain))->udata = (PTR)NULL; |
2fa0b342 | 855 | |
c611e285 SC |
856 | (*( sp->scoms_chain))->section = |
857 | &bfd_com_section; | |
858 | (*( sp->scoms_chain))->flags = 0; | |
1418c83b SC |
859 | /* Remember the size of this item */ |
860 | sp->scoms_chain[0]->value = p->value; | |
2fa0b342 DHW |
861 | commons_pending++; |
862 | undefined_global_sym_count--; | |
863 | } { | |
864 | asymbol *com = *(sp->scoms_chain); | |
865 | if (((lang_input_statement_type *) | |
866 | (com->the_bfd->usrdata))->common_section == | |
867 | (asection *)NULL) { | |
868 | ((lang_input_statement_type *) | |
869 | (com->the_bfd->usrdata))->common_section = | |
c611e285 | 870 | bfd_make_section_old_way(com->the_bfd, "COMMON"); |
2fa0b342 DHW |
871 | } |
872 | } | |
3e4c643d | 873 | } |
2fa0b342 DHW |
874 | ASSERT(p->udata == 0); |
875 | } | |
876 | ||
877 | else { | |
878 | if (write_map) | |
879 | { | |
880 | info("%I needed due to %s\n",entry, sp->name); | |
881 | } | |
882 | return true; | |
883 | } | |
884 | } | |
885 | } | |
886 | } | |
887 | } | |
888 | ||
889 | return false; | |
890 | } | |
891 | ||
c611e285 | 892 |