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252b5132 RH |
1 | # This shell script emits a C file. -*- C -*- |
2 | # It does some substitutions. | |
3 | cat >e${EMULATION_NAME}.c <<EOF | |
4 | /* This file is is generated by a shell script. DO NOT EDIT! */ | |
5 | ||
6 | /* SunOS emulation code for ${EMULATION_NAME} | |
a2b64bed | 7 | Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 |
252b5132 RH |
8 | Free Software Foundation, Inc. |
9 | Written by Steve Chamberlain <sac@cygnus.com> | |
10 | SunOS shared library support by Ian Lance Taylor <ian@cygnus.com> | |
11 | ||
12 | This file is part of GLD, the Gnu Linker. | |
13 | ||
14 | This program is free software; you can redistribute it and/or modify | |
15 | it under the terms of the GNU General Public License as published by | |
16 | the Free Software Foundation; either version 2 of the License, or | |
17 | (at your option) any later version. | |
18 | ||
19 | This program is distributed in the hope that it will be useful, | |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
23 | ||
24 | You should have received a copy of the GNU General Public License | |
25 | along with this program; if not, write to the Free Software | |
26 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
27 | ||
28 | #define TARGET_IS_${EMULATION_NAME} | |
29 | ||
30 | #include <ctype.h> | |
31 | ||
32 | #include "bfd.h" | |
33 | #include "sysdep.h" | |
34 | #include "bfdlink.h" | |
35 | #include "libiberty.h" | |
36 | ||
37 | #include "ld.h" | |
38 | #include "ldmain.h" | |
252b5132 RH |
39 | #include "ldmisc.h" |
40 | #include "ldexp.h" | |
41 | #include "ldlang.h" | |
b71e2778 AM |
42 | #include "ldfile.h" |
43 | #include "ldemul.h" | |
252b5132 RH |
44 | |
45 | #ifdef HAVE_DIRENT_H | |
46 | # include <dirent.h> | |
47 | #else | |
48 | # define dirent direct | |
49 | # ifdef HAVE_SYS_NDIR_H | |
50 | # include <sys/ndir.h> | |
51 | # endif | |
52 | # ifdef HAVE_SYS_DIR_H | |
53 | # include <sys/dir.h> | |
54 | # endif | |
55 | # ifdef HAVE_NDIR_H | |
56 | # include <ndir.h> | |
57 | # endif | |
58 | #endif | |
59 | ||
60 | static void gld${EMULATION_NAME}_before_parse PARAMS ((void)); | |
61 | static void gld${EMULATION_NAME}_set_symbols PARAMS ((void)); | |
62 | static void gld${EMULATION_NAME}_create_output_section_statements | |
63 | PARAMS ((void)); | |
64 | static void gld${EMULATION_NAME}_find_so | |
65 | PARAMS ((lang_input_statement_type *)); | |
66 | static char *gld${EMULATION_NAME}_search_dir | |
67 | PARAMS ((const char *, const char *, boolean *)); | |
68 | static void gld${EMULATION_NAME}_after_open PARAMS ((void)); | |
69 | static void gld${EMULATION_NAME}_check_needed | |
70 | PARAMS ((lang_input_statement_type *)); | |
71 | static boolean gld${EMULATION_NAME}_search_needed | |
72 | PARAMS ((const char *, const char *)); | |
73 | static boolean gld${EMULATION_NAME}_try_needed | |
74 | PARAMS ((const char *, const char *)); | |
75 | static void gld${EMULATION_NAME}_before_allocation PARAMS ((void)); | |
76 | static void gld${EMULATION_NAME}_find_assignment | |
77 | PARAMS ((lang_statement_union_type *)); | |
78 | static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *)); | |
79 | static void gld${EMULATION_NAME}_count_need | |
80 | PARAMS ((lang_input_statement_type *)); | |
81 | static void gld${EMULATION_NAME}_set_need | |
82 | PARAMS ((lang_input_statement_type *)); | |
83 | static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); | |
84 | ||
85 | static void | |
86 | gld${EMULATION_NAME}_before_parse() | |
87 | { | |
88 | ldfile_output_architecture = bfd_arch_${ARCH}; | |
89 | config.dynamic_link = true; | |
90 | config.has_shared = true; | |
91 | } | |
92 | ||
93 | /* This is called after the command line arguments have been parsed, | |
94 | but before the linker script has been read. If this is a native | |
95 | linker, we add the directories in LD_LIBRARY_PATH to the search | |
96 | list. */ | |
97 | ||
98 | static void | |
99 | gld${EMULATION_NAME}_set_symbols () | |
100 | { | |
101 | EOF | |
102 | if [ "x${host}" = "x${target}" ] ; then | |
f97f7300 RH |
103 | case " ${EMULATION_LIBPATH} " in |
104 | *" ${EMULATION_NAME} "*) | |
252b5132 RH |
105 | cat >>e${EMULATION_NAME}.c <<EOF |
106 | const char *env; | |
107 | ||
108 | env = (const char *) getenv ("LD_LIBRARY_PATH"); | |
109 | if (env != NULL) | |
110 | { | |
111 | char *l; | |
112 | ||
113 | l = xstrdup (env); | |
114 | while (1) | |
115 | { | |
116 | char *c; | |
117 | ||
118 | c = strchr (l, ':'); | |
119 | if (c != NULL) | |
120 | *c++ = '\0'; | |
121 | if (*l != '\0') | |
122 | ldfile_add_library_path (l, false); | |
123 | if (c == NULL) | |
124 | break; | |
125 | l = c; | |
126 | } | |
127 | } | |
128 | EOF | |
f97f7300 RH |
129 | ;; |
130 | esac | |
252b5132 RH |
131 | fi |
132 | cat >>e${EMULATION_NAME}.c <<EOF | |
133 | } | |
134 | ||
135 | /* Despite the name, we use this routine to search for dynamic | |
136 | libraries. On SunOS this requires a directory search. We need to | |
137 | find the .so file with the highest version number. The user may | |
138 | restrict the major version by saying, e.g., -lc.1. Also, if we | |
139 | find a .so file, we need to look for a the same file after | |
140 | replacing .so with .sa; if it exists, it will be an archive which | |
141 | provide some initializations for data symbols, and we need to | |
142 | search it after including the .so file. */ | |
143 | ||
144 | static void | |
145 | gld${EMULATION_NAME}_create_output_section_statements () | |
146 | { | |
147 | lang_for_each_input_file (gld${EMULATION_NAME}_find_so); | |
148 | } | |
149 | ||
150 | /* Search the directory for a .so file for each library search. */ | |
151 | ||
152 | static void | |
153 | gld${EMULATION_NAME}_find_so (inp) | |
154 | lang_input_statement_type *inp; | |
155 | { | |
156 | search_dirs_type *search; | |
157 | char *found = NULL; | |
158 | char *alc; | |
159 | struct stat st; | |
160 | ||
161 | if (! inp->search_dirs_flag | |
162 | || ! inp->is_archive | |
163 | || ! inp->dynamic) | |
164 | return; | |
165 | ||
166 | ASSERT (strncmp (inp->local_sym_name, "-l", 2) == 0); | |
167 | ||
168 | for (search = search_head; search != NULL; search = search->next) | |
169 | { | |
170 | boolean found_static; | |
171 | ||
172 | found = gld${EMULATION_NAME}_search_dir (search->name, inp->filename, | |
173 | &found_static); | |
174 | if (found != NULL || found_static) | |
175 | break; | |
176 | } | |
177 | ||
178 | if (found == NULL) | |
179 | { | |
180 | /* We did not find a matching .so file. This isn't an error, | |
181 | since there might still be a matching .a file, which will be | |
182 | found by the usual search. */ | |
183 | return; | |
184 | } | |
185 | ||
186 | /* Replace the filename with the one we have found. */ | |
187 | alc = (char *) xmalloc (strlen (search->name) + strlen (found) + 2); | |
188 | sprintf (alc, "%s/%s", search->name, found); | |
189 | inp->filename = alc; | |
190 | ||
191 | /* Turn off the search_dirs_flag to prevent ldfile_open_file from | |
192 | searching for this file again. */ | |
193 | inp->search_dirs_flag = false; | |
194 | ||
195 | free (found); | |
196 | ||
197 | /* Now look for the same file name, but with .sa instead of .so. If | |
198 | found, add it to the list of input files. */ | |
199 | alc = (char *) xmalloc (strlen (inp->filename) + 1); | |
200 | strcpy (alc, inp->filename); | |
201 | strstr (alc + strlen (search->name), ".so")[2] = 'a'; | |
202 | if (stat (alc, &st) != 0) | |
203 | free (alc); | |
204 | else | |
205 | { | |
206 | lang_input_statement_type *sa; | |
207 | ||
208 | /* Add the .sa file to the statement list just before the .so | |
209 | file. This is really a hack. */ | |
210 | sa = ((lang_input_statement_type *) | |
211 | xmalloc (sizeof (lang_input_statement_type))); | |
212 | *sa = *inp; | |
213 | ||
214 | inp->filename = alc; | |
215 | inp->local_sym_name = alc; | |
216 | ||
217 | inp->header.next = (lang_statement_union_type *) sa; | |
218 | inp->next_real_file = (lang_statement_union_type *) sa; | |
219 | } | |
220 | } | |
221 | ||
222 | /* Search a directory for a .so file. */ | |
223 | ||
224 | static char * | |
225 | gld${EMULATION_NAME}_search_dir (dirname, filename, found_static) | |
226 | const char *dirname; | |
227 | const char *filename; | |
228 | boolean *found_static; | |
229 | { | |
230 | int force_maj, force_min; | |
231 | const char *dot; | |
232 | unsigned int len; | |
233 | char *alc; | |
234 | char *found; | |
235 | int max_maj, max_min; | |
236 | DIR *dir; | |
237 | struct dirent *entry; | |
238 | unsigned int dirnamelen; | |
239 | char *full_path; | |
240 | int statval; | |
241 | struct stat st; | |
242 | ||
243 | *found_static = false; | |
244 | ||
245 | force_maj = -1; | |
246 | force_min = -1; | |
247 | dot = strchr (filename, '.'); | |
248 | if (dot == NULL) | |
249 | { | |
250 | len = strlen (filename); | |
251 | alc = NULL; | |
252 | } | |
253 | else | |
254 | { | |
255 | force_maj = atoi (dot + 1); | |
256 | ||
257 | len = dot - filename; | |
258 | alc = (char *) xmalloc (len + 1); | |
259 | strncpy (alc, filename, len); | |
260 | alc[len] = '\0'; | |
261 | filename = alc; | |
262 | ||
263 | dot = strchr (dot + 1, '.'); | |
264 | if (dot != NULL) | |
265 | force_min = atoi (dot + 1); | |
266 | } | |
267 | ||
268 | found = NULL; | |
269 | max_maj = max_min = 0; | |
270 | ||
271 | dir = opendir (dirname); | |
272 | if (dir == NULL) | |
273 | return NULL; | |
274 | dirnamelen = strlen (dirname); | |
275 | ||
276 | while ((entry = readdir (dir)) != NULL) | |
277 | { | |
278 | const char *s; | |
279 | int found_maj, found_min; | |
280 | ||
281 | if (strncmp (entry->d_name, "lib", 3) != 0 | |
282 | || strncmp (entry->d_name + 3, filename, len) != 0) | |
283 | continue; | |
284 | ||
285 | if (dot == NULL | |
286 | && strcmp (entry->d_name + 3 + len, ".a") == 0) | |
287 | { | |
288 | *found_static = true; | |
289 | continue; | |
290 | } | |
291 | ||
292 | /* We accept libfoo.so without a version number, even though the | |
293 | native linker does not. This is more convenient for packages | |
294 | which just generate .so files for shared libraries, as on ELF | |
295 | systems. */ | |
296 | if (strncmp (entry->d_name + 3 + len, ".so", 3) != 0) | |
297 | continue; | |
298 | if (entry->d_name[6 + len] == '\0') | |
299 | ; | |
300 | else if (entry->d_name[6 + len] == '.' | |
301 | && isdigit ((unsigned char) entry->d_name[7 + len])) | |
302 | ; | |
303 | else | |
304 | continue; | |
305 | ||
306 | for (s = entry->d_name + 6 + len; *s != '\0'; s++) | |
307 | if (*s != '.' && ! isdigit ((unsigned char) *s)) | |
308 | break; | |
309 | if (*s != '\0') | |
310 | continue; | |
311 | ||
312 | /* We've found a .so file. Work out the major and minor | |
313 | version numbers. */ | |
314 | found_maj = 0; | |
315 | found_min = 0; | |
316 | sscanf (entry->d_name + 3 + len, ".so.%d.%d", | |
317 | &found_maj, &found_min); | |
318 | ||
319 | if ((force_maj != -1 && force_maj != found_maj) | |
320 | || (force_min != -1 && force_min != found_min)) | |
321 | continue; | |
322 | ||
323 | /* Make sure the file really exists (ignore broken symlinks). */ | |
324 | full_path = xmalloc (dirnamelen + 1 + strlen (entry->d_name) + 1); | |
325 | sprintf (full_path, "%s/%s", dirname, entry->d_name); | |
326 | statval = stat (full_path, &st); | |
327 | free (full_path); | |
328 | if (statval != 0) | |
329 | continue; | |
330 | ||
331 | /* We've found a match for the name we are searching for. See | |
332 | if this is the version we should use. If the major and minor | |
333 | versions match, we use the last entry in alphabetical order; | |
334 | I don't know if this is how SunOS distinguishes libc.so.1.8 | |
335 | from libc.so.1.8.1, but it ought to suffice. */ | |
336 | if (found == NULL | |
337 | || (found_maj > max_maj) | |
338 | || (found_maj == max_maj | |
339 | && (found_min > max_min | |
340 | || (found_min == max_min | |
341 | && strcmp (entry->d_name, found) > 0)))) | |
342 | { | |
343 | if (found != NULL) | |
344 | free (found); | |
345 | found = (char *) xmalloc (strlen (entry->d_name) + 1); | |
346 | strcpy (found, entry->d_name); | |
347 | max_maj = found_maj; | |
348 | max_min = found_min; | |
349 | } | |
350 | } | |
351 | ||
352 | closedir (dir); | |
353 | ||
354 | if (alc != NULL) | |
355 | free (alc); | |
356 | ||
357 | return found; | |
358 | } | |
359 | ||
360 | /* These variables are required to pass information back and forth | |
361 | between after_open and check_needed. */ | |
362 | ||
363 | static struct bfd_link_needed_list *global_needed; | |
364 | static boolean global_found; | |
365 | ||
366 | /* This is called after all the input files have been opened. */ | |
367 | ||
368 | static void | |
369 | gld${EMULATION_NAME}_after_open () | |
370 | { | |
371 | struct bfd_link_needed_list *needed, *l; | |
372 | ||
373 | /* We only need to worry about this when doing a final link. */ | |
374 | if (link_info.relocateable || link_info.shared) | |
375 | return; | |
376 | ||
377 | /* Get the list of files which appear in ld_need entries in dynamic | |
378 | objects included in the link. For each such file, we want to | |
379 | track down the corresponding library, and include the symbol | |
380 | table in the link. This is what the runtime dynamic linker will | |
381 | do. Tracking the files down here permits one dynamic object to | |
382 | include another without requiring special action by the person | |
383 | doing the link. Note that the needed list can actually grow | |
384 | while we are stepping through this loop. */ | |
385 | needed = bfd_sunos_get_needed_list (output_bfd, &link_info); | |
386 | for (l = needed; l != NULL; l = l->next) | |
387 | { | |
388 | struct bfd_link_needed_list *ll; | |
389 | const char *lname; | |
390 | search_dirs_type *search; | |
391 | ||
392 | lname = l->name; | |
393 | ||
394 | /* If we've already seen this file, skip it. */ | |
395 | for (ll = needed; ll != l; ll = ll->next) | |
396 | if (strcmp (ll->name, lname) == 0) | |
397 | break; | |
398 | if (ll != l) | |
399 | continue; | |
400 | ||
401 | /* See if this file was included in the link explicitly. */ | |
402 | global_needed = l; | |
403 | global_found = false; | |
404 | lang_for_each_input_file (gld${EMULATION_NAME}_check_needed); | |
405 | if (global_found) | |
406 | continue; | |
407 | ||
408 | if (strncmp (lname, "-l", 2) != 0) | |
409 | { | |
410 | bfd *abfd; | |
411 | ||
412 | abfd = bfd_openr (lname, bfd_get_target (output_bfd)); | |
413 | if (abfd != NULL) | |
414 | { | |
415 | if (! bfd_check_format (abfd, bfd_object)) | |
416 | { | |
417 | (void) bfd_close (abfd); | |
418 | abfd = NULL; | |
419 | } | |
420 | } | |
421 | if (abfd != NULL) | |
422 | { | |
423 | if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0) | |
424 | { | |
425 | (void) bfd_close (abfd); | |
426 | abfd = NULL; | |
427 | } | |
428 | } | |
429 | if (abfd != NULL) | |
430 | { | |
431 | /* We've found the needed dynamic object. */ | |
432 | if (! bfd_link_add_symbols (abfd, &link_info)) | |
433 | einfo ("%F%B: could not read symbols: %E\n", abfd); | |
434 | } | |
435 | else | |
436 | { | |
437 | einfo ("%P: warning: %s, needed by %B, not found\n", | |
438 | lname, l->by); | |
439 | } | |
440 | ||
441 | continue; | |
442 | } | |
443 | ||
444 | lname += 2; | |
445 | ||
446 | /* We want to search for the file in the same way that the | |
447 | dynamic linker will search. That means that we want to use | |
448 | rpath_link, rpath or -L, then the environment variable | |
449 | LD_LIBRARY_PATH (native only), then (if rpath was used) the | |
450 | linker script LIB_SEARCH_DIRS. */ | |
451 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link, | |
452 | lname)) | |
453 | continue; | |
454 | if (command_line.rpath != NULL) | |
455 | { | |
456 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath, lname)) | |
457 | continue; | |
458 | } | |
459 | else | |
460 | { | |
461 | for (search = search_head; search != NULL; search = search->next) | |
462 | if (gld${EMULATION_NAME}_try_needed (search->name, lname)) | |
463 | break; | |
464 | if (search != NULL) | |
465 | continue; | |
466 | } | |
467 | EOF | |
468 | if [ "x${host}" = "x${target}" ] ; then | |
f97f7300 RH |
469 | case " ${EMULATION_LIBPATH} " in |
470 | *" ${EMULATION_NAME} "*) | |
252b5132 RH |
471 | cat >>e${EMULATION_NAME}.c <<EOF |
472 | { | |
473 | const char *lib_path; | |
474 | ||
475 | lib_path = (const char *) getenv ("LD_LIBRARY_PATH"); | |
476 | if (gld${EMULATION_NAME}_search_needed (lib_path, lname)) | |
477 | continue; | |
478 | } | |
479 | EOF | |
f97f7300 RH |
480 | ;; |
481 | esac | |
252b5132 RH |
482 | fi |
483 | cat >>e${EMULATION_NAME}.c <<EOF | |
484 | if (command_line.rpath != NULL) | |
485 | { | |
486 | for (search = search_head; search != NULL; search = search->next) | |
487 | { | |
488 | if (search->cmdline) | |
489 | continue; | |
490 | if (gld${EMULATION_NAME}_try_needed (search->name, lname)) | |
491 | break; | |
492 | } | |
493 | if (search != NULL) | |
494 | continue; | |
495 | } | |
496 | ||
497 | einfo ("%P: warning: %s, needed by %B, not found\n", | |
498 | l->name, l->by); | |
499 | } | |
500 | } | |
501 | ||
502 | /* Search for a needed file in a path. */ | |
503 | ||
504 | static boolean | |
505 | gld${EMULATION_NAME}_search_needed (path, name) | |
506 | const char *path; | |
507 | const char *name; | |
508 | { | |
509 | const char *s; | |
510 | ||
511 | if (path == NULL || *path == '\0') | |
512 | return false; | |
513 | while (1) | |
514 | { | |
515 | const char *dir; | |
516 | char *dircopy; | |
517 | ||
518 | s = strchr (path, ':'); | |
519 | if (s == NULL) | |
520 | { | |
521 | dircopy = NULL; | |
522 | dir = path; | |
523 | } | |
524 | else | |
525 | { | |
526 | dircopy = (char *) xmalloc (s - path + 1); | |
527 | memcpy (dircopy, path, s - path); | |
528 | dircopy[s - path] = '\0'; | |
529 | dir = dircopy; | |
530 | } | |
531 | ||
532 | if (gld${EMULATION_NAME}_try_needed (dir, name)) | |
533 | return true; | |
534 | ||
535 | if (dircopy != NULL) | |
536 | free (dircopy); | |
537 | ||
538 | if (s == NULL) | |
539 | break; | |
540 | path = s + 1; | |
541 | } | |
542 | ||
543 | return false; | |
544 | } | |
545 | ||
546 | /* This function is called for each possible directory for a needed | |
547 | dynamic object. */ | |
548 | ||
549 | static boolean | |
550 | gld${EMULATION_NAME}_try_needed (dir, name) | |
551 | const char *dir; | |
552 | const char *name; | |
553 | { | |
554 | char *file; | |
555 | char *alc; | |
556 | boolean ignore; | |
557 | bfd *abfd; | |
558 | ||
559 | file = gld${EMULATION_NAME}_search_dir (dir, name, &ignore); | |
560 | if (file == NULL) | |
561 | return false; | |
562 | ||
563 | alc = (char *) xmalloc (strlen (dir) + strlen (file) + 2); | |
564 | sprintf (alc, "%s/%s", dir, file); | |
565 | free (file); | |
566 | abfd = bfd_openr (alc, bfd_get_target (output_bfd)); | |
567 | if (abfd == NULL) | |
568 | return false; | |
569 | if (! bfd_check_format (abfd, bfd_object)) | |
570 | { | |
571 | (void) bfd_close (abfd); | |
572 | return false; | |
573 | } | |
574 | if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0) | |
575 | { | |
576 | (void) bfd_close (abfd); | |
577 | return false; | |
578 | } | |
579 | ||
580 | /* We've found the needed dynamic object. */ | |
581 | ||
582 | /* Add this file into the symbol table. */ | |
583 | if (! bfd_link_add_symbols (abfd, &link_info)) | |
584 | einfo ("%F%B: could not read symbols: %E\n", abfd); | |
585 | ||
586 | return true; | |
587 | } | |
588 | ||
589 | /* See if we have already included a needed object in the link. This | |
590 | does not have to be precise, as it does no harm to include a | |
591 | dynamic object more than once. */ | |
592 | ||
593 | static void | |
594 | gld${EMULATION_NAME}_check_needed (s) | |
595 | lang_input_statement_type *s; | |
596 | { | |
597 | if (s->filename == NULL) | |
598 | return; | |
599 | if (strncmp (global_needed->name, "-l", 2) != 0) | |
600 | { | |
601 | if (strcmp (s->filename, global_needed->name) == 0) | |
602 | global_found = true; | |
603 | } | |
604 | else | |
605 | { | |
606 | const char *sname, *lname; | |
607 | const char *sdot, *ldot; | |
608 | int lmaj, lmin, smaj, smin; | |
609 | ||
610 | lname = global_needed->name + 2; | |
611 | ||
612 | sname = strrchr (s->filename, '/'); | |
613 | if (sname == NULL) | |
614 | sname = s->filename; | |
615 | else | |
616 | ++sname; | |
617 | ||
618 | if (strncmp (sname, "lib", 3) != 0) | |
619 | return; | |
620 | sname += 3; | |
621 | ||
622 | ldot = strchr (lname, '.'); | |
623 | if (ldot == NULL) | |
624 | ldot = lname + strlen (lname); | |
625 | ||
626 | sdot = strstr (sname, ".so."); | |
627 | if (sdot == NULL) | |
628 | return; | |
629 | ||
630 | if (sdot - sname != ldot - lname | |
631 | || strncmp (lname, sname, sdot - sname) != 0) | |
632 | return; | |
633 | ||
634 | lmaj = lmin = -1; | |
635 | sscanf (ldot, ".%d.%d", &lmaj, &lmin); | |
636 | smaj = smin = -1; | |
637 | sscanf (sdot, ".so.%d.%d", &smaj, &smin); | |
638 | if ((smaj != lmaj && smaj != -1 && lmaj != -1) | |
639 | || (smin != lmin && smin != -1 && lmin != -1)) | |
640 | return; | |
641 | ||
642 | global_found = true; | |
643 | } | |
644 | } | |
645 | ||
646 | /* We need to use static variables to pass information around the call | |
647 | to lang_for_each_statement. Ick. */ | |
648 | ||
649 | static const char *find_assign; | |
650 | static boolean found_assign; | |
651 | ||
652 | /* We need to use static variables to pass information around the call | |
653 | to lang_for_each_input_file. Ick. */ | |
654 | ||
655 | static bfd_size_type need_size; | |
656 | static bfd_size_type need_entries; | |
657 | static bfd_byte *need_contents; | |
658 | static bfd_byte *need_pinfo; | |
659 | static bfd_byte *need_pnames; | |
660 | ||
661 | /* The size of one entry in the .need section, not including the file | |
662 | name. */ | |
663 | ||
664 | #define NEED_ENTRY_SIZE (16) | |
665 | ||
666 | /* This is called after the sections have been attached to output | |
667 | sections, but before any sizes or addresses have been set. */ | |
668 | ||
669 | static void | |
670 | gld${EMULATION_NAME}_before_allocation () | |
671 | { | |
672 | struct bfd_link_hash_entry *hdyn = NULL; | |
673 | asection *sneed; | |
674 | asection *srules; | |
675 | asection *sdyn; | |
676 | ||
677 | /* The SunOS native linker creates a shared library whenever there | |
678 | are any undefined symbols in a link, unless -e is used. This is | |
679 | pretty weird, but we are compatible. */ | |
680 | if (! link_info.shared && ! link_info.relocateable && ! entry_from_cmdline) | |
681 | { | |
682 | struct bfd_link_hash_entry *h; | |
683 | ||
684 | for (h = link_info.hash->undefs; h != NULL; h = h->next) | |
685 | { | |
686 | if (h->type == bfd_link_hash_undefined | |
687 | && h->u.undef.abfd != NULL | |
688 | && (h->u.undef.abfd->flags & DYNAMIC) == 0 | |
689 | && strcmp (h->root.string, "__DYNAMIC") != 0 | |
690 | && strcmp (h->root.string, "__GLOBAL_OFFSET_TABLE_") != 0) | |
691 | { | |
692 | find_assign = h->root.string; | |
693 | found_assign = false; | |
694 | lang_for_each_statement (gld${EMULATION_NAME}_find_assignment); | |
695 | if (! found_assign) | |
696 | { | |
697 | link_info.shared = true; | |
698 | break; | |
699 | } | |
700 | } | |
701 | } | |
702 | } | |
703 | ||
704 | if (link_info.shared) | |
705 | { | |
706 | lang_output_section_statement_type *os; | |
707 | ||
708 | /* Set the .text section to start at 0x20, not 0x2020. FIXME: | |
709 | This is too magical. */ | |
710 | os = lang_output_section_statement_lookup (".text"); | |
711 | if (os->addr_tree == NULL) | |
712 | os->addr_tree = exp_intop (0x20); | |
713 | } | |
714 | ||
715 | /* We need to create a __DYNAMIC symbol. We don't do this in the | |
716 | linker script because we want to set the value to the start of | |
717 | the dynamic section if there is one, or to zero if there isn't | |
718 | one. We need to create the symbol before calling | |
719 | size_dynamic_sections, although we can't set the value until | |
720 | afterward. */ | |
721 | if (! link_info.relocateable) | |
722 | { | |
723 | hdyn = bfd_link_hash_lookup (link_info.hash, "__DYNAMIC", true, false, | |
724 | false); | |
725 | if (hdyn == NULL) | |
726 | einfo ("%P%F: bfd_link_hash_lookup: %E\n"); | |
727 | if (! bfd_sunos_record_link_assignment (output_bfd, &link_info, | |
728 | "__DYNAMIC")) | |
729 | einfo ("%P%F: failed to record assignment to __DYNAMIC: %E\n"); | |
730 | } | |
731 | ||
732 | /* If we are going to make any variable assignments, we need to let | |
733 | the backend linker know about them in case the variables are | |
734 | referred to by dynamic objects. */ | |
735 | lang_for_each_statement (gld${EMULATION_NAME}_find_assignment); | |
736 | ||
737 | /* Let the backend linker work out the sizes of any sections | |
738 | required by dynamic linking. */ | |
739 | if (! bfd_sunos_size_dynamic_sections (output_bfd, &link_info, &sdyn, | |
740 | &sneed, &srules)) | |
741 | einfo ("%P%F: failed to set dynamic section sizes: %E\n"); | |
742 | ||
743 | if (sneed != NULL) | |
744 | { | |
745 | /* Set up the .need section. See the description of the ld_need | |
746 | field in include/aout/sun4.h. */ | |
747 | ||
748 | need_entries = 0; | |
749 | need_size = 0; | |
750 | ||
751 | lang_for_each_input_file (gld${EMULATION_NAME}_count_need); | |
752 | ||
753 | /* We should only have a .need section if we have at least one | |
754 | dynamic object. */ | |
755 | ASSERT (need_entries != 0); | |
756 | ||
757 | sneed->_raw_size = need_size; | |
758 | sneed->contents = (bfd_byte *) xmalloc (need_size); | |
759 | ||
760 | need_contents = sneed->contents; | |
761 | need_pinfo = sneed->contents; | |
762 | need_pnames = sneed->contents + need_entries * 16; | |
763 | ||
764 | lang_for_each_input_file (gld${EMULATION_NAME}_set_need); | |
765 | ||
766 | ASSERT ((bfd_size_type) (need_pnames - sneed->contents) == need_size); | |
767 | } | |
768 | ||
769 | if (srules != NULL) | |
770 | { | |
771 | /* Set up the .rules section. This is just a PATH like string | |
772 | of the -L arguments given on the command line. We permit the | |
773 | user to specify the directories using the -rpath command line | |
774 | option. */ | |
775 | if (command_line.rpath) | |
776 | { | |
777 | srules->_raw_size = strlen (command_line.rpath); | |
778 | srules->contents = (bfd_byte *) command_line.rpath; | |
779 | } | |
780 | else | |
781 | { | |
782 | unsigned int size; | |
783 | search_dirs_type *search; | |
784 | ||
785 | size = 0; | |
786 | for (search = search_head; search != NULL; search = search->next) | |
787 | if (search->cmdline) | |
788 | size += strlen (search->name) + 1; | |
789 | srules->_raw_size = size; | |
790 | if (size > 0) | |
791 | { | |
792 | char *p; | |
793 | ||
794 | srules->contents = (bfd_byte *) xmalloc (size); | |
795 | p = (char *) srules->contents; | |
796 | *p = '\0'; | |
797 | for (search = search_head; search != NULL; search = search->next) | |
798 | { | |
799 | if (search->cmdline) | |
800 | { | |
801 | if (p != (char *) srules->contents) | |
802 | *p++ = ':'; | |
803 | strcpy (p, search->name); | |
804 | p += strlen (p); | |
805 | } | |
806 | } | |
807 | } | |
808 | } | |
809 | } | |
810 | ||
811 | /* We must assign a value to __DYNAMIC. It should be zero if we are | |
812 | not doing a dynamic link, or the start of the .dynamic section if | |
813 | we are doing one. */ | |
814 | if (! link_info.relocateable) | |
815 | { | |
816 | hdyn->type = bfd_link_hash_defined; | |
817 | hdyn->u.def.value = 0; | |
818 | if (sdyn != NULL) | |
819 | hdyn->u.def.section = sdyn; | |
820 | else | |
821 | hdyn->u.def.section = bfd_abs_section_ptr; | |
822 | } | |
823 | } | |
824 | ||
825 | /* This is called by the before_allocation routine via | |
826 | lang_for_each_statement. It does one of two things: if the | |
827 | variable find_assign is set, it sets found_assign if it finds an | |
828 | assignment to that variable; otherwise it tells the backend linker | |
829 | about all assignment statements, in case they are assignments to | |
830 | symbols which are referred to by dynamic objects. */ | |
831 | ||
832 | static void | |
833 | gld${EMULATION_NAME}_find_assignment (s) | |
834 | lang_statement_union_type *s; | |
835 | { | |
836 | if (s->header.type == lang_assignment_statement_enum | |
837 | && (find_assign == NULL || ! found_assign)) | |
838 | gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); | |
839 | } | |
840 | ||
841 | /* Look through an expression for an assignment statement. */ | |
842 | ||
843 | static void | |
844 | gld${EMULATION_NAME}_find_exp_assignment (exp) | |
845 | etree_type *exp; | |
846 | { | |
847 | switch (exp->type.node_class) | |
848 | { | |
849 | case etree_assign: | |
850 | if (find_assign != NULL) | |
851 | { | |
852 | if (strcmp (find_assign, exp->assign.dst) == 0) | |
853 | found_assign = true; | |
854 | return; | |
855 | } | |
856 | ||
857 | if (strcmp (exp->assign.dst, ".") != 0) | |
858 | { | |
859 | if (! bfd_sunos_record_link_assignment (output_bfd, &link_info, | |
860 | exp->assign.dst)) | |
861 | einfo ("%P%F: failed to record assignment to %s: %E\n", | |
862 | exp->assign.dst); | |
863 | } | |
864 | gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src); | |
865 | break; | |
866 | ||
867 | case etree_binary: | |
868 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs); | |
869 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs); | |
870 | break; | |
871 | ||
872 | case etree_trinary: | |
873 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond); | |
874 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs); | |
875 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs); | |
876 | break; | |
877 | ||
878 | case etree_unary: | |
879 | gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child); | |
880 | break; | |
881 | ||
882 | default: | |
883 | break; | |
884 | } | |
885 | } | |
886 | ||
887 | /* Work out the size of the .need section, and the number of entries. | |
888 | The backend will set the ld_need field of the dynamic linking | |
889 | information to point to the .need section. See include/aout/sun4.h | |
890 | for more information. */ | |
891 | ||
892 | static void | |
893 | gld${EMULATION_NAME}_count_need (inp) | |
894 | lang_input_statement_type *inp; | |
895 | { | |
896 | if (inp->the_bfd != NULL | |
897 | && (inp->the_bfd->flags & DYNAMIC) != 0) | |
898 | { | |
899 | ++need_entries; | |
900 | need_size += NEED_ENTRY_SIZE; | |
901 | if (! inp->is_archive) | |
902 | need_size += strlen (inp->filename) + 1; | |
903 | else | |
904 | { | |
905 | ASSERT (inp->local_sym_name[0] == '-' | |
906 | && inp->local_sym_name[1] == 'l'); | |
907 | need_size += strlen (inp->local_sym_name + 2) + 1; | |
908 | } | |
909 | } | |
910 | } | |
911 | ||
912 | /* Fill in the contents of the .need section. */ | |
913 | ||
914 | static void | |
915 | gld${EMULATION_NAME}_set_need (inp) | |
916 | lang_input_statement_type *inp; | |
917 | { | |
918 | if (inp->the_bfd != NULL | |
919 | && (inp->the_bfd->flags & DYNAMIC) != 0) | |
920 | { | |
921 | bfd_size_type c; | |
922 | ||
923 | /* To really fill in the .need section contents, we need to know | |
924 | the final file position of the section, but we don't. | |
925 | Instead, we use offsets, and rely on the BFD backend to | |
926 | finish the section up correctly. FIXME: Talk about lack of | |
927 | referential locality. */ | |
928 | bfd_put_32 (output_bfd, need_pnames - need_contents, need_pinfo); | |
929 | if (! inp->is_archive) | |
930 | { | |
931 | bfd_put_32 (output_bfd, (bfd_vma) 0, need_pinfo + 4); | |
932 | bfd_put_16 (output_bfd, (bfd_vma) 0, need_pinfo + 8); | |
933 | bfd_put_16 (output_bfd, (bfd_vma) 0, need_pinfo + 10); | |
934 | strcpy (need_pnames, inp->filename); | |
935 | } | |
936 | else | |
937 | { | |
938 | char *verstr; | |
939 | int maj, min; | |
940 | ||
941 | bfd_put_32 (output_bfd, (bfd_vma) 0x80000000, need_pinfo + 4); | |
942 | maj = 0; | |
943 | min = 0; | |
944 | verstr = strstr (inp->filename, ".so."); | |
945 | if (verstr != NULL) | |
946 | sscanf (verstr, ".so.%d.%d", &maj, &min); | |
947 | bfd_put_16 (output_bfd, (bfd_vma) maj, need_pinfo + 8); | |
948 | bfd_put_16 (output_bfd, (bfd_vma) min, need_pinfo + 10); | |
949 | strcpy (need_pnames, inp->local_sym_name + 2); | |
950 | } | |
951 | ||
952 | c = (need_pinfo - need_contents) / NEED_ENTRY_SIZE; | |
953 | if (c + 1 >= need_entries) | |
954 | bfd_put_32 (output_bfd, (bfd_vma) 0, need_pinfo + 12); | |
955 | else | |
956 | bfd_put_32 (output_bfd, (bfd_vma) (c + 1) * NEED_ENTRY_SIZE, | |
957 | need_pinfo + 12); | |
958 | ||
959 | need_pinfo += NEED_ENTRY_SIZE; | |
960 | need_pnames += strlen (need_pnames) + 1; | |
961 | } | |
962 | } | |
963 | ||
964 | static char * | |
965 | gld${EMULATION_NAME}_get_script(isfile) | |
966 | int *isfile; | |
967 | EOF | |
968 | ||
969 | if test -n "$COMPILE_IN" | |
970 | then | |
971 | # Scripts compiled in. | |
972 | ||
973 | # sed commands to quote an ld script as a C string. | |
597e2591 | 974 | sc="-f stringify.sed" |
252b5132 RH |
975 | |
976 | cat >>e${EMULATION_NAME}.c <<EOF | |
977 | { | |
978 | *isfile = 0; | |
979 | ||
980 | if (link_info.relocateable == true && config.build_constructors == true) | |
597e2591 | 981 | return |
252b5132 | 982 | EOF |
597e2591 ILT |
983 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c |
984 | echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c | |
985 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c | |
986 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c | |
987 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c | |
988 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c | |
989 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c | |
990 | echo ' ; else return' >> e${EMULATION_NAME}.c | |
991 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c | |
992 | echo '; }' >> e${EMULATION_NAME}.c | |
252b5132 RH |
993 | |
994 | else | |
995 | # Scripts read from the filesystem. | |
996 | ||
997 | cat >>e${EMULATION_NAME}.c <<EOF | |
998 | { | |
999 | *isfile = 1; | |
1000 | ||
1001 | if (link_info.relocateable == true && config.build_constructors == true) | |
1002 | return "ldscripts/${EMULATION_NAME}.xu"; | |
1003 | else if (link_info.relocateable == true) | |
1004 | return "ldscripts/${EMULATION_NAME}.xr"; | |
1005 | else if (!config.text_read_only) | |
1006 | return "ldscripts/${EMULATION_NAME}.xbn"; | |
1007 | else if (!config.magic_demand_paged) | |
1008 | return "ldscripts/${EMULATION_NAME}.xn"; | |
1009 | else | |
1010 | return "ldscripts/${EMULATION_NAME}.x"; | |
1011 | } | |
1012 | EOF | |
1013 | ||
1014 | fi | |
1015 | ||
1016 | cat >>e${EMULATION_NAME}.c <<EOF | |
1017 | ||
1018 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = | |
1019 | { | |
1020 | gld${EMULATION_NAME}_before_parse, | |
1021 | syslib_default, | |
1022 | hll_default, | |
1023 | after_parse_default, | |
1024 | gld${EMULATION_NAME}_after_open, | |
1025 | after_allocation_default, | |
1026 | set_output_arch_default, | |
1027 | ldemul_default_target, | |
1028 | gld${EMULATION_NAME}_before_allocation, | |
1029 | gld${EMULATION_NAME}_get_script, | |
1030 | "${EMULATION_NAME}", | |
1031 | "${OUTPUT_FORMAT}", | |
e1c47aa4 | 1032 | NULL, /* finish */ |
252b5132 | 1033 | gld${EMULATION_NAME}_create_output_section_statements, |
e1c47aa4 AM |
1034 | NULL, /* open dynamic archive */ |
1035 | NULL, /* place orphan */ | |
1036 | gld${EMULATION_NAME}_set_symbols, | |
1037 | NULL, /* parse args */ | |
1038 | NULL, /* unrecognized file */ | |
1039 | NULL, /* list options */ | |
40d109bf AM |
1040 | NULL, /* recognized file */ |
1041 | NULL /* find_potential_libraries */ | |
252b5132 RH |
1042 | }; |
1043 | EOF |