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ed601bea ILT |
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 ${EMULATION_NAME} | |
7 | Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc. | |
8 | Written by Steve Chamberlain <sac@cygnus.com> | |
9 | SunOS shared library support by Ian Lance Taylor <ian@cygnus.com> | |
10 | ||
11 | This file is part of GLD, the Gnu Linker. | |
12 | ||
13 | This program is free software; you can redistribute it and/or modify | |
14 | it under the terms of the GNU General Public License as published by | |
15 | the Free Software Foundation; either version 2 of the License, or | |
16 | (at your option) any later version. | |
17 | ||
18 | This program is distributed in the hope that it will be useful, | |
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | GNU General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU General Public License | |
24 | along with this program; if not, write to the Free Software | |
25 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
26 | ||
27 | #define TARGET_IS_${EMULATION_NAME} | |
28 | ||
29 | #include <sys/types.h> | |
30 | #include <sys/stat.h> | |
31 | ||
32 | /* FIXME: On some hosts we will need to include a different file. | |
33 | This is correct for SunOS, which is the only place this file will | |
34 | typically be compiled. However, if somebody configures the linker | |
35 | for all targets, they will run into trouble here. */ | |
36 | #include <dirent.h> | |
37 | ||
38 | #include "bfd.h" | |
39 | #include "sysdep.h" | |
40 | #include "bfdlink.h" | |
41 | ||
42 | #include "ld.h" | |
43 | #include "config.h" | |
44 | #include "ldmain.h" | |
45 | #include "ldemul.h" | |
46 | #include "ldfile.h" | |
47 | #include "ldmisc.h" | |
48 | #include "ldexp.h" | |
49 | #include "ldlang.h" | |
50 | ||
51 | static void gld${EMULATION_NAME}_before_parse PARAMS ((void)); | |
52 | static void gld${EMULATION_NAME}_create_output_section_statements | |
53 | PARAMS ((void)); | |
54 | static void gld${EMULATION_NAME}_find_so | |
55 | PARAMS ((lang_input_statement_type *)); | |
56 | static void gld${EMULATION_NAME}_before_allocation PARAMS ((void)); | |
57 | static void gld${EMULATION_NAME}_find_statement_assignment | |
58 | PARAMS ((lang_statement_union_type *)); | |
59 | static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *)); | |
60 | static void gld${EMULATION_NAME}_count_need | |
61 | PARAMS ((lang_input_statement_type *)); | |
62 | static void gld${EMULATION_NAME}_set_need | |
63 | PARAMS ((lang_input_statement_type *)); | |
64 | static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); | |
65 | ||
66 | static void | |
67 | gld${EMULATION_NAME}_before_parse() | |
68 | { | |
69 | ldfile_output_architecture = bfd_arch_${ARCH}; | |
70 | config.dynamic_link = true; | |
71 | } | |
72 | ||
73 | /* Despite the name, we use this routine to search for dynamic | |
74 | libraries. On SunOS this requires a directory search. We need to | |
75 | find the .so file with the highest version number. The user may | |
76 | restrict the major version by saying, e.g., -lc.1. Also, if we | |
77 | find a .so file, we need to look for a the same file after | |
78 | replacing .so with .sa; if it exists, it will be an archive which | |
79 | provide some initializations for data symbols, and we need to | |
80 | search it after including the .so file. */ | |
81 | ||
82 | static void | |
83 | gld${EMULATION_NAME}_create_output_section_statements () | |
84 | { | |
85 | lang_for_each_input_file (gld${EMULATION_NAME}_find_so); | |
86 | } | |
87 | ||
88 | /* Search the directory for a .so file for each library search. */ | |
89 | ||
90 | static void | |
91 | gld${EMULATION_NAME}_find_so (inp) | |
92 | lang_input_statement_type *inp; | |
93 | { | |
94 | search_dirs_type *search; | |
95 | const char *filename; | |
96 | const char *dot; | |
97 | int force_maj; | |
98 | unsigned int len; | |
99 | char *alc; | |
100 | int max_maj, max_min; | |
101 | char *found; | |
102 | struct stat st; | |
103 | ||
104 | if (! inp->search_dirs_flag | |
105 | || ! inp->is_archive) | |
106 | return; | |
107 | ||
108 | ASSERT (strncmp (inp->local_sym_name, "-l", 2) == 0); | |
109 | ||
110 | filename = inp->filename; | |
111 | force_maj = -1; | |
112 | dot = strchr (filename, '.'); | |
113 | if (dot == NULL) | |
114 | len = strlen (filename); | |
115 | else | |
116 | { | |
117 | len = dot - filename; | |
118 | alc = (char *) alloca (len + 1); | |
119 | strncpy (alc, filename, len); | |
120 | alc[len] = '\0'; | |
121 | filename = alc; | |
122 | } | |
123 | ||
124 | found = NULL; | |
125 | max_maj = max_min = 0; | |
126 | for (search = search_head; search != NULL; search = search->next) | |
127 | { | |
128 | DIR *dir; | |
129 | struct dirent *entry; | |
130 | ||
131 | dir = opendir (search->name); | |
132 | if (dir == NULL) | |
133 | continue; | |
134 | ||
135 | while ((entry = readdir (dir)) != NULL) | |
136 | { | |
137 | int found_maj, found_min; | |
138 | ||
139 | if (strncmp (entry->d_name, "lib", 3) != 0 | |
140 | || strncmp (entry->d_name + 3, inp->filename, len) != 0 | |
141 | || strncmp (entry->d_name + 3 + len, ".so", 3) != 0) | |
142 | continue; | |
143 | ||
144 | /* We've found a .so file. Work out the major and minor | |
145 | version numbers. */ | |
146 | found_maj = 0; | |
147 | found_min = 0; | |
148 | sscanf (entry->d_name + 3 + len, ".so.%d.%d", | |
149 | &found_maj, &found_min); | |
150 | ||
151 | if (force_maj != -1 && force_maj != found_maj) | |
152 | continue; | |
153 | ||
154 | /* We've found a match for the name we are searching for. | |
155 | See if this is the version we should use. If the major | |
156 | and minor versions match, we use the last entry in | |
157 | alphabetical order; I don't know if this is how SunOS | |
158 | distinguishes libc.so.1.8 from libc.so.1.8.1, but it | |
159 | ought to suffice. */ | |
160 | if (found == NULL | |
161 | || (found_maj > max_maj) | |
162 | || (found_maj == max_maj | |
163 | && (found_min > max_min | |
164 | || (found_min == max_min | |
165 | && strcmp (entry->d_name, found) > 0)))) | |
166 | { | |
167 | if (found != NULL) | |
168 | free (found); | |
169 | found = (char *) xmalloc (strlen (entry->d_name) + 1); | |
170 | strcpy (found, entry->d_name); | |
171 | max_maj = found_maj; | |
172 | max_min = found_min; | |
173 | } | |
174 | } | |
175 | ||
176 | closedir (dir); | |
177 | ||
178 | if (found != NULL) | |
179 | break; | |
180 | } | |
181 | ||
182 | if (found == NULL) | |
183 | { | |
184 | /* We did not find a matching .so file. This isn't an error, | |
185 | since there might still be a matching .a file, which will be | |
186 | found by the usual search. */ | |
187 | return; | |
188 | } | |
189 | ||
190 | /* Replace the filename with the one we have found. */ | |
191 | alc = (char *) xmalloc (strlen (search->name) + strlen (found) + 2); | |
192 | sprintf (alc, "%s/%s", search->name, found); | |
193 | inp->filename = alc; | |
194 | ||
195 | /* Turn off the search_dirs_flag to prevent ldfile_open_file from | |
196 | searching for this file again. */ | |
197 | inp->search_dirs_flag = false; | |
198 | ||
199 | free (found); | |
200 | ||
201 | /* Now look for the same file name, but with .sa instead of .so. If | |
202 | found, add it to the list of input files. */ | |
203 | alc = (char *) alloca (strlen (inp->filename) + 1); | |
204 | strcpy (alc, inp->filename); | |
205 | strstr (alc, ".so.")[2] = 'a'; | |
206 | if (stat (alc, &st) == 0) | |
207 | { | |
208 | lang_input_statement_type *sa; | |
209 | char *a; | |
210 | ||
211 | /* Add the .sa file to the statement list just after the .so | |
212 | file. This is really a hack. */ | |
213 | sa = ((lang_input_statement_type *) | |
214 | xmalloc (sizeof (lang_input_statement_type))); | |
215 | sa->header.next = inp->header.next; | |
216 | sa->header.type = lang_input_statement_enum; | |
217 | a = (char *) xmalloc (strlen (alc) + 1); | |
218 | strcpy (a, alc); | |
219 | sa->filename = a; | |
220 | sa->local_sym_name = a; | |
221 | sa->the_bfd = NULL; | |
222 | sa->asymbols = NULL; | |
223 | sa->symbol_count = 0; | |
2f4b5b53 | 224 | sa->next = NULL; |
ed601bea ILT |
225 | sa->next_real_file = inp->next_real_file; |
226 | sa->is_archive = false; | |
227 | sa->search_dirs_flag = false; | |
228 | sa->just_syms_flag = false; | |
229 | sa->loaded = false; | |
2f4b5b53 ILT |
230 | sa->real = true; |
231 | sa->complained = false; | |
ed601bea | 232 | |
2f4b5b53 ILT |
233 | /* Put the new statement next on the list of statements and next |
234 | on the list of input files. */ | |
ed601bea | 235 | inp->header.next = (lang_statement_union_type *) sa; |
ed601bea ILT |
236 | inp->next_real_file = (lang_statement_union_type *) sa; |
237 | } | |
238 | } | |
239 | ||
240 | /* We need to use static variables to pass information around the call | |
241 | to lang_for_each_input_file. Ick. */ | |
242 | ||
243 | static bfd_size_type need_size; | |
244 | static bfd_size_type need_entries; | |
245 | static bfd_byte *need_contents; | |
246 | static bfd_byte *need_pinfo; | |
247 | static bfd_byte *need_pnames; | |
248 | ||
249 | /* The size of one entry in the .need section, not including the file | |
250 | name. */ | |
251 | ||
252 | #define NEED_ENTRY_SIZE (16) | |
253 | ||
254 | /* This is called after the sections have been attached to output | |
255 | sections, but before any sizes or addresses have been set. */ | |
256 | ||
257 | static void | |
258 | gld${EMULATION_NAME}_before_allocation () | |
259 | { | |
260 | struct bfd_link_hash_entry *h = NULL; | |
261 | asection *sneed; | |
262 | asection *srules; | |
263 | asection *sdyn; | |
264 | ||
265 | /* We need to create a __DYNAMIC symbol. We don't do this in the | |
266 | linker script because we want to set the value to the start of | |
267 | the dynamic section if there is one, or to zero if there isn't | |
268 | one. We need to create the symbol before calling | |
269 | size_dynamic_sections, although we can't set the value until | |
270 | afterward. */ | |
271 | if (! link_info.relocateable) | |
272 | { | |
273 | h = bfd_link_hash_lookup (link_info.hash, "__DYNAMIC", true, false, | |
274 | false); | |
275 | if (h == NULL) | |
276 | einfo ("%P%F: bfd_link_hash_lookup: %E\n"); | |
277 | if (! bfd_sunos_record_link_assignment (output_bfd, &link_info, | |
278 | "__DYNAMIC")) | |
279 | einfo ("%P%F: failed to record assignment to __DYNAMIC: %E\n"); | |
280 | } | |
281 | ||
282 | /* If we are going to make any variable assignments, we need to let | |
283 | the backend linker know about them in case the variables are | |
284 | referred to by dynamic objects. */ | |
285 | lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment); | |
286 | ||
287 | /* Let the backend linker work out the sizes of any sections | |
288 | required by dynamic linking. */ | |
289 | if (! bfd_sunos_size_dynamic_sections (output_bfd, &link_info, &sdyn, | |
290 | &sneed, &srules)) | |
291 | einfo ("%P%F: failed to set dynamic section sizes: %E\n"); | |
292 | ||
293 | if (sneed != NULL) | |
294 | { | |
295 | /* Set up the .need section. See the description of the ld_need | |
296 | field in include/sun4/aout.h. */ | |
297 | ||
298 | need_entries = 0; | |
299 | need_size = 0; | |
300 | ||
301 | lang_for_each_input_file (gld${EMULATION_NAME}_count_need); | |
302 | ||
303 | /* We should only have a .need section if we have at least one | |
304 | dynamic object. */ | |
305 | ASSERT (need_entries != 0); | |
306 | ||
307 | sneed->_raw_size = need_size; | |
308 | sneed->contents = (bfd_byte *) xmalloc (need_size); | |
309 | ||
310 | need_contents = sneed->contents; | |
311 | need_pinfo = sneed->contents; | |
312 | need_pnames = sneed->contents + need_entries * 16; | |
313 | ||
314 | lang_for_each_input_file (gld${EMULATION_NAME}_set_need); | |
315 | ||
316 | ASSERT (need_pnames - sneed->contents == need_size); | |
317 | } | |
318 | ||
319 | if (srules != NULL) | |
320 | { | |
321 | unsigned int size; | |
322 | search_dirs_type *search; | |
323 | ||
324 | /* Set up the .rules section. This is just a PATH like string | |
325 | of the -L arguments given on the command line. */ | |
326 | size = 0; | |
327 | for (search = search_head; search != NULL; search = search->next) | |
328 | if (search->cmdline) | |
329 | size += strlen (search->name) + 1; | |
330 | srules->_raw_size = size; | |
331 | if (size > 0) | |
332 | { | |
333 | char *p; | |
334 | ||
335 | srules->contents = (bfd_byte *) xmalloc (size); | |
336 | p = (char *) srules->contents; | |
337 | *p = '\0'; | |
338 | for (search = search_head; search != NULL; search = search->next) | |
339 | { | |
340 | if (search->cmdline) | |
341 | { | |
342 | if (p != (char *) srules->contents) | |
343 | *p++ = ':'; | |
344 | strcpy (p, search->name); | |
345 | p += strlen (p); | |
346 | } | |
347 | } | |
348 | } | |
349 | } | |
350 | ||
351 | /* We must assign a value to __DYNAMIC. It should be zero if we are | |
352 | not doing a dynamic link, or the start of the .dynamic section if | |
353 | we are doing one. */ | |
354 | if (! link_info.relocateable) | |
355 | { | |
356 | h->type = bfd_link_hash_defined; | |
357 | h->u.def.value = 0; | |
358 | if (sdyn != NULL) | |
359 | h->u.def.section = sdyn; | |
360 | else | |
361 | h->u.def.section = &bfd_abs_section; | |
362 | } | |
363 | } | |
364 | ||
365 | /* This is called by the before_allocation routine via | |
366 | lang_for_each_statement. It locates any assignment statements, and | |
367 | tells the backend linker about them, in case they are assignments | |
368 | to symbols which are referred to by dynamic objects. */ | |
369 | ||
370 | static void | |
371 | gld${EMULATION_NAME}_find_statement_assignment (s) | |
372 | lang_statement_union_type *s; | |
373 | { | |
374 | if (s->header.type == lang_assignment_statement_enum) | |
375 | gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); | |
376 | } | |
377 | ||
378 | /* Look through an expression for an assignment statement. */ | |
379 | ||
380 | static void | |
381 | gld${EMULATION_NAME}_find_exp_assignment (exp) | |
382 | etree_type *exp; | |
383 | { | |
384 | switch (exp->type.node_class) | |
385 | { | |
386 | case etree_assign: | |
387 | if (strcmp (exp->assign.dst, ".") != 0) | |
388 | { | |
389 | if (! bfd_sunos_record_link_assignment (output_bfd, &link_info, | |
390 | exp->assign.dst)) | |
391 | einfo ("%P%F: failed to record assignment to %s: %E\n", | |
392 | exp->assign.dst); | |
393 | } | |
394 | gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src); | |
395 | break; | |
396 | ||
397 | case etree_binary: | |
398 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs); | |
399 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs); | |
400 | break; | |
401 | ||
402 | case etree_trinary: | |
403 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs); | |
404 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs); | |
405 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs); | |
406 | break; | |
407 | ||
408 | case etree_unary: | |
409 | gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child); | |
410 | break; | |
411 | ||
412 | default: | |
413 | break; | |
414 | } | |
415 | } | |
416 | ||
417 | /* Work out the size of the .need section, and the number of entries. | |
418 | The backend will set the ld_need field of the dynamic linking | |
419 | information to point to the .need section. See include/aout/sun4.h | |
420 | for more information. */ | |
421 | ||
422 | static void | |
423 | gld${EMULATION_NAME}_count_need (inp) | |
424 | lang_input_statement_type *inp; | |
425 | { | |
426 | if (inp->the_bfd != NULL | |
427 | && (inp->the_bfd->flags & DYNAMIC) != 0) | |
428 | { | |
429 | ++need_entries; | |
430 | need_size += NEED_ENTRY_SIZE; | |
431 | if (! inp->is_archive) | |
432 | need_size += strlen (inp->filename) + 1; | |
433 | else | |
434 | { | |
435 | ASSERT (inp->local_sym_name[0] == '-' | |
436 | && inp->local_sym_name[1] == 'l'); | |
437 | need_size += strlen (inp->local_sym_name + 2) + 1; | |
438 | } | |
439 | } | |
440 | } | |
441 | ||
442 | /* Fill in the contents of the .need section. */ | |
443 | ||
444 | static void | |
445 | gld${EMULATION_NAME}_set_need (inp) | |
446 | lang_input_statement_type *inp; | |
447 | { | |
448 | if (inp->the_bfd != NULL | |
449 | && (inp->the_bfd->flags & DYNAMIC) != 0) | |
450 | { | |
451 | bfd_size_type c; | |
452 | ||
453 | /* To really fill in the .need section contents, we need to know | |
454 | the final file position of the section, but we don't. | |
455 | Instead, we use offsets, and rely on the BFD backend to | |
456 | finish the section up correctly. FIXME: Talk about lack of | |
457 | referential locality. */ | |
458 | bfd_put_32 (output_bfd, need_pnames - need_contents, need_pinfo); | |
459 | if (! inp->is_archive) | |
460 | { | |
461 | bfd_put_32 (output_bfd, (bfd_vma) 0, need_pinfo + 4); | |
462 | bfd_put_16 (output_bfd, (bfd_vma) 0, need_pinfo + 8); | |
463 | bfd_put_16 (output_bfd, (bfd_vma) 0, need_pinfo + 10); | |
464 | strcpy (need_pnames, inp->filename); | |
465 | } | |
466 | else | |
467 | { | |
468 | char *verstr; | |
469 | int maj, min; | |
470 | ||
471 | bfd_put_32 (output_bfd, (bfd_vma) 0x80000000, need_pinfo + 4); | |
472 | maj = 0; | |
473 | min = 0; | |
474 | verstr = strstr (inp->filename, ".so."); | |
475 | if (verstr != NULL) | |
476 | sscanf (verstr, ".so.%d.%d", &maj, &min); | |
477 | bfd_put_16 (output_bfd, (bfd_vma) maj, need_pinfo + 8); | |
478 | bfd_put_16 (output_bfd, (bfd_vma) min, need_pinfo + 10); | |
479 | strcpy (need_pnames, inp->local_sym_name + 2); | |
480 | } | |
481 | ||
482 | c = (need_pinfo - need_contents) / NEED_ENTRY_SIZE; | |
483 | if (c + 1 >= need_entries) | |
484 | bfd_put_32 (output_bfd, (bfd_vma) 0, need_pinfo + 12); | |
485 | else | |
486 | bfd_put_32 (output_bfd, (bfd_vma) (c + 1) * NEED_ENTRY_SIZE, | |
487 | need_pinfo + 12); | |
488 | ||
489 | need_pinfo += NEED_ENTRY_SIZE; | |
490 | need_pnames += strlen (need_pnames) + 1; | |
491 | } | |
492 | } | |
493 | ||
494 | static char * | |
495 | gld${EMULATION_NAME}_get_script(isfile) | |
496 | int *isfile; | |
497 | EOF | |
498 | ||
499 | if test -n "$COMPILE_IN" | |
500 | then | |
501 | # Scripts compiled in. | |
502 | ||
503 | # sed commands to quote an ld script as a C string. | |
504 | sc='s/["\\]/\\&/g | |
505 | s/$/\\n\\/ | |
506 | 1s/^/"/ | |
507 | $s/$/n"/ | |
508 | ' | |
509 | ||
510 | cat >>e${EMULATION_NAME}.c <<EOF | |
511 | { | |
512 | *isfile = 0; | |
513 | ||
514 | if (link_info.relocateable == true && config.build_constructors == true) | |
515 | return `sed "$sc" ldscripts/${EMULATION_NAME}.xu`; | |
516 | else if (link_info.relocateable == true) | |
517 | return `sed "$sc" ldscripts/${EMULATION_NAME}.xr`; | |
518 | else if (!config.text_read_only) | |
519 | return `sed "$sc" ldscripts/${EMULATION_NAME}.xbn`; | |
520 | else if (!config.magic_demand_paged) | |
521 | return `sed "$sc" ldscripts/${EMULATION_NAME}.xn`; | |
522 | else | |
523 | return `sed "$sc" ldscripts/${EMULATION_NAME}.x`; | |
524 | } | |
525 | EOF | |
526 | ||
527 | else | |
528 | # Scripts read from the filesystem. | |
529 | ||
530 | cat >>e${EMULATION_NAME}.c <<EOF | |
531 | { | |
532 | *isfile = 1; | |
533 | ||
534 | if (link_info.relocateable == true && config.build_constructors == true) | |
535 | return "ldscripts/${EMULATION_NAME}.xu"; | |
536 | else if (link_info.relocateable == true) | |
537 | return "ldscripts/${EMULATION_NAME}.xr"; | |
538 | else if (!config.text_read_only) | |
539 | return "ldscripts/${EMULATION_NAME}.xbn"; | |
540 | else if (!config.magic_demand_paged) | |
541 | return "ldscripts/${EMULATION_NAME}.xn"; | |
542 | else | |
543 | return "ldscripts/${EMULATION_NAME}.x"; | |
544 | } | |
545 | EOF | |
546 | ||
547 | fi | |
548 | ||
549 | cat >>e${EMULATION_NAME}.c <<EOF | |
550 | ||
551 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = | |
552 | { | |
553 | gld${EMULATION_NAME}_before_parse, | |
554 | syslib_default, | |
555 | hll_default, | |
556 | after_parse_default, | |
557 | after_allocation_default, | |
558 | set_output_arch_default, | |
559 | ldemul_default_target, | |
560 | gld${EMULATION_NAME}_before_allocation, | |
561 | gld${EMULATION_NAME}_get_script, | |
562 | "${EMULATION_NAME}", | |
563 | "${OUTPUT_FORMAT}", | |
564 | 0, /* finish */ | |
565 | gld${EMULATION_NAME}_create_output_section_statements | |
566 | }; | |
567 | EOF |