source: trunk/binutils/ld/emultempl/sunos.em@ 3066

Last change on this file since 3066 was 610, checked in by bird, 22 years ago

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File size: 28.5 KB
Line 
1# This shell script emits a C file. -*- C -*-
2# It does some substitutions.
3if [ -z "$MACHINE" ]; then
4 OUTPUT_ARCH=${ARCH}
5else
6 OUTPUT_ARCH=${ARCH}:${MACHINE}
7fi
8cat >e${EMULATION_NAME}.c <<EOF
9/* This file is is generated by a shell script. DO NOT EDIT! */
10
11/* SunOS emulation code for ${EMULATION_NAME}
12 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003
13 Free Software Foundation, Inc.
14 Written by Steve Chamberlain <sac@cygnus.com>
15 SunOS shared library support by Ian Lance Taylor <ian@cygnus.com>
16
17This file is part of GLD, the Gnu Linker.
18
19This program is free software; you can redistribute it and/or modify
20it under the terms of the GNU General Public License as published by
21the Free Software Foundation; either version 2 of the License, or
22(at your option) any later version.
23
24This program is distributed in the hope that it will be useful,
25but WITHOUT ANY WARRANTY; without even the implied warranty of
26MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27GNU General Public License for more details.
28
29You should have received a copy of the GNU General Public License
30along with this program; if not, write to the Free Software
31Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
32
33#define TARGET_IS_${EMULATION_NAME}
34
35#include "bfd.h"
36#include "sysdep.h"
37#include "bfdlink.h"
38#include "libiberty.h"
39#include "safe-ctype.h"
40
41#include "ld.h"
42#include "ldmain.h"
43#include "ldmisc.h"
44#include "ldexp.h"
45#include "ldlang.h"
46#include "ldfile.h"
47#include "ldemul.h"
48
49#ifdef HAVE_DIRENT_H
50# include <dirent.h>
51#else
52# define dirent direct
53# ifdef HAVE_SYS_NDIR_H
54# include <sys/ndir.h>
55# endif
56# ifdef HAVE_SYS_DIR_H
57# include <sys/dir.h>
58# endif
59# ifdef HAVE_NDIR_H
60# include <ndir.h>
61# endif
62#endif
63
64static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
65static void gld${EMULATION_NAME}_set_symbols PARAMS ((void));
66static void gld${EMULATION_NAME}_create_output_section_statements
67 PARAMS ((void));
68static void gld${EMULATION_NAME}_find_so
69 PARAMS ((lang_input_statement_type *));
70static char *gld${EMULATION_NAME}_search_dir
71 PARAMS ((const char *, const char *, bfd_boolean *));
72static void gld${EMULATION_NAME}_after_open PARAMS ((void));
73static void gld${EMULATION_NAME}_check_needed
74 PARAMS ((lang_input_statement_type *));
75static bfd_boolean gld${EMULATION_NAME}_search_needed
76 PARAMS ((const char *, const char *));
77static bfd_boolean gld${EMULATION_NAME}_try_needed
78 PARAMS ((const char *, const char *));
79static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
80static void gld${EMULATION_NAME}_find_assignment
81 PARAMS ((lang_statement_union_type *));
82static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
83static void gld${EMULATION_NAME}_count_need
84 PARAMS ((lang_input_statement_type *));
85static void gld${EMULATION_NAME}_set_need
86 PARAMS ((lang_input_statement_type *));
87static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
88
89static void
90gld${EMULATION_NAME}_before_parse()
91{
92 const bfd_arch_info_type *arch = bfd_scan_arch ("${OUTPUT_ARCH}");
93 if (arch)
94 {
95 ldfile_output_architecture = arch->arch;
96 ldfile_output_machine = arch->mach;
97 ldfile_output_machine_name = arch->printable_name;
98 }
99 else
100 ldfile_output_architecture = bfd_arch_${ARCH};
101 config.dynamic_link = TRUE;
102 config.has_shared = TRUE;
103}
104
105/* This is called after the command line arguments have been parsed,
106 but before the linker script has been read. If this is a native
107 linker, we add the directories in LD_LIBRARY_PATH to the search
108 list. */
109
110static void
111gld${EMULATION_NAME}_set_symbols ()
112{
113EOF
114if [ "x${host}" = "x${target}" ] ; then
115 case " ${EMULATION_LIBPATH} " in
116 *" ${EMULATION_NAME} "*)
117cat >>e${EMULATION_NAME}.c <<EOF
118 const char *env;
119
120 env = (const char *) getenv ("LD_LIBRARY_PATH");
121 if (env != NULL)
122 {
123 char *l;
124
125 l = xstrdup (env);
126 while (1)
127 {
128 char *c;
129
130 c = strchr (l, ':');
131 if (c != NULL)
132 *c++ = '\0';
133 if (*l != '\0')
134 ldfile_add_library_path (l, FALSE);
135 if (c == NULL)
136 break;
137 l = c;
138 }
139 }
140EOF
141 ;;
142 esac
143fi
144cat >>e${EMULATION_NAME}.c <<EOF
145}
146
147/* Despite the name, we use this routine to search for dynamic
148 libraries. On SunOS this requires a directory search. We need to
149 find the .so file with the highest version number. The user may
150 restrict the major version by saying, e.g., -lc.1. Also, if we
151 find a .so file, we need to look for a the same file after
152 replacing .so with .sa; if it exists, it will be an archive which
153 provide some initializations for data symbols, and we need to
154 search it after including the .so file. */
155
156static void
157gld${EMULATION_NAME}_create_output_section_statements ()
158{
159 lang_for_each_input_file (gld${EMULATION_NAME}_find_so);
160}
161
162/* Search the directory for a .so file for each library search. */
163
164static void
165gld${EMULATION_NAME}_find_so (inp)
166 lang_input_statement_type *inp;
167{
168 search_dirs_type *search;
169 char *found = NULL;
170 char *alc;
171 struct stat st;
172
173 if (! inp->search_dirs_flag
174 || ! inp->is_archive
175 || ! inp->dynamic)
176 return;
177
178 ASSERT (strncmp (inp->local_sym_name, "-l", 2) == 0);
179
180 for (search = search_head; search != NULL; search = search->next)
181 {
182 bfd_boolean found_static;
183
184 found = gld${EMULATION_NAME}_search_dir (search->name, inp->filename,
185 &found_static);
186 if (found != NULL || found_static)
187 break;
188 }
189
190 if (found == NULL)
191 {
192 /* We did not find a matching .so file. This isn't an error,
193 since there might still be a matching .a file, which will be
194 found by the usual search. */
195 return;
196 }
197
198 /* Replace the filename with the one we have found. */
199 alc = (char *) xmalloc (strlen (search->name) + strlen (found) + 2);
200 sprintf (alc, "%s/%s", search->name, found);
201 inp->filename = alc;
202
203 /* Turn off the search_dirs_flag to prevent ldfile_open_file from
204 searching for this file again. */
205 inp->search_dirs_flag = FALSE;
206
207 free (found);
208
209 /* Now look for the same file name, but with .sa instead of .so. If
210 found, add it to the list of input files. */
211 alc = (char *) xmalloc (strlen (inp->filename) + 1);
212 strcpy (alc, inp->filename);
213 strstr (alc + strlen (search->name), ".so")[2] = 'a';
214 if (stat (alc, &st) != 0)
215 free (alc);
216 else
217 {
218 lang_input_statement_type *sa;
219
220 /* Add the .sa file to the statement list just before the .so
221 file. This is really a hack. */
222 sa = ((lang_input_statement_type *)
223 xmalloc (sizeof (lang_input_statement_type)));
224 *sa = *inp;
225
226 inp->filename = alc;
227 inp->local_sym_name = alc;
228
229 inp->header.next = (lang_statement_union_type *) sa;
230 inp->next_real_file = (lang_statement_union_type *) sa;
231 }
232}
233
234/* Search a directory for a .so file. */
235
236static char *
237gld${EMULATION_NAME}_search_dir (dirname, filename, found_static)
238 const char *dirname;
239 const char *filename;
240 bfd_boolean *found_static;
241{
242 int force_maj, force_min;
243 const char *dot;
244 unsigned int len;
245 char *alc;
246 char *found;
247 int max_maj, max_min;
248 DIR *dir;
249 struct dirent *entry;
250 unsigned int dirnamelen;
251 char *full_path;
252 int statval;
253 struct stat st;
254
255 *found_static = FALSE;
256
257 force_maj = -1;
258 force_min = -1;
259 dot = strchr (filename, '.');
260 if (dot == NULL)
261 {
262 len = strlen (filename);
263 alc = NULL;
264 }
265 else
266 {
267 force_maj = atoi (dot + 1);
268
269 len = dot - filename;
270 alc = (char *) xmalloc (len + 1);
271 strncpy (alc, filename, len);
272 alc[len] = '\0';
273 filename = alc;
274
275 dot = strchr (dot + 1, '.');
276 if (dot != NULL)
277 force_min = atoi (dot + 1);
278 }
279
280 found = NULL;
281 max_maj = max_min = 0;
282
283 dir = opendir (dirname);
284 if (dir == NULL)
285 return NULL;
286 dirnamelen = strlen (dirname);
287
288 while ((entry = readdir (dir)) != NULL)
289 {
290 const char *s;
291 int found_maj, found_min;
292
293 if (strncmp (entry->d_name, "lib", 3) != 0
294 || strncmp (entry->d_name + 3, filename, len) != 0)
295 continue;
296
297 if (dot == NULL
298 && strcmp (entry->d_name + 3 + len, ".a") == 0)
299 {
300 *found_static = TRUE;
301 continue;
302 }
303
304 /* We accept libfoo.so without a version number, even though the
305 native linker does not. This is more convenient for packages
306 which just generate .so files for shared libraries, as on ELF
307 systems. */
308 if (strncmp (entry->d_name + 3 + len, ".so", 3) != 0)
309 continue;
310 if (entry->d_name[6 + len] == '\0')
311 ;
312 else if (entry->d_name[6 + len] == '.'
313 && ISDIGIT (entry->d_name[7 + len]))
314 ;
315 else
316 continue;
317
318 for (s = entry->d_name + 6 + len; *s != '\0'; s++)
319 if (*s != '.' && ! ISDIGIT (*s))
320 break;
321 if (*s != '\0')
322 continue;
323
324 /* We've found a .so file. Work out the major and minor
325 version numbers. */
326 found_maj = 0;
327 found_min = 0;
328 sscanf (entry->d_name + 3 + len, ".so.%d.%d",
329 &found_maj, &found_min);
330
331 if ((force_maj != -1 && force_maj != found_maj)
332 || (force_min != -1 && force_min != found_min))
333 continue;
334
335 /* Make sure the file really exists (ignore broken symlinks). */
336 full_path = xmalloc (dirnamelen + 1 + strlen (entry->d_name) + 1);
337 sprintf (full_path, "%s/%s", dirname, entry->d_name);
338 statval = stat (full_path, &st);
339 free (full_path);
340 if (statval != 0)
341 continue;
342
343 /* We've found a match for the name we are searching for. See
344 if this is the version we should use. If the major and minor
345 versions match, we use the last entry in alphabetical order;
346 I don't know if this is how SunOS distinguishes libc.so.1.8
347 from libc.so.1.8.1, but it ought to suffice. */
348 if (found == NULL
349 || (found_maj > max_maj)
350 || (found_maj == max_maj
351 && (found_min > max_min
352 || (found_min == max_min
353 && strcmp (entry->d_name, found) > 0))))
354 {
355 if (found != NULL)
356 free (found);
357 found = (char *) xmalloc (strlen (entry->d_name) + 1);
358 strcpy (found, entry->d_name);
359 max_maj = found_maj;
360 max_min = found_min;
361 }
362 }
363
364 closedir (dir);
365
366 if (alc != NULL)
367 free (alc);
368
369 return found;
370}
371
372/* These variables are required to pass information back and forth
373 between after_open and check_needed. */
374
375static struct bfd_link_needed_list *global_needed;
376static bfd_boolean global_found;
377
378/* This is called after all the input files have been opened. */
379
380static void
381gld${EMULATION_NAME}_after_open ()
382{
383 struct bfd_link_needed_list *needed, *l;
384
385 /* We only need to worry about this when doing a final link. */
386 if (link_info.relocateable || link_info.shared)
387 return;
388
389 /* Get the list of files which appear in ld_need entries in dynamic
390 objects included in the link. For each such file, we want to
391 track down the corresponding library, and include the symbol
392 table in the link. This is what the runtime dynamic linker will
393 do. Tracking the files down here permits one dynamic object to
394 include another without requiring special action by the person
395 doing the link. Note that the needed list can actually grow
396 while we are stepping through this loop. */
397 needed = bfd_sunos_get_needed_list (output_bfd, &link_info);
398 for (l = needed; l != NULL; l = l->next)
399 {
400 struct bfd_link_needed_list *ll;
401 const char *lname;
402 search_dirs_type *search;
403
404 lname = l->name;
405
406 /* If we've already seen this file, skip it. */
407 for (ll = needed; ll != l; ll = ll->next)
408 if (strcmp (ll->name, lname) == 0)
409 break;
410 if (ll != l)
411 continue;
412
413 /* See if this file was included in the link explicitly. */
414 global_needed = l;
415 global_found = FALSE;
416 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
417 if (global_found)
418 continue;
419
420 if (strncmp (lname, "-l", 2) != 0)
421 {
422 bfd *abfd;
423
424 abfd = bfd_openr (lname, bfd_get_target (output_bfd));
425 if (abfd != NULL)
426 {
427 if (! bfd_check_format (abfd, bfd_object))
428 {
429 (void) bfd_close (abfd);
430 abfd = NULL;
431 }
432 }
433 if (abfd != NULL)
434 {
435 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
436 {
437 (void) bfd_close (abfd);
438 abfd = NULL;
439 }
440 }
441 if (abfd != NULL)
442 {
443 /* We've found the needed dynamic object. */
444 if (! bfd_link_add_symbols (abfd, &link_info))
445 einfo ("%F%B: could not read symbols: %E\n", abfd);
446 }
447 else
448 {
449 einfo ("%P: warning: %s, needed by %B, not found\n",
450 lname, l->by);
451 }
452
453 continue;
454 }
455
456 lname += 2;
457
458 /* We want to search for the file in the same way that the
459 dynamic linker will search. That means that we want to use
460 rpath_link, rpath or -L, then the environment variable
461 LD_LIBRARY_PATH (native only), then (if rpath was used) the
462 linker script LIB_SEARCH_DIRS. */
463 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
464 lname))
465 continue;
466 if (command_line.rpath != NULL)
467 {
468 if (gld${EMULATION_NAME}_search_needed (command_line.rpath, lname))
469 continue;
470 }
471 else
472 {
473 for (search = search_head; search != NULL; search = search->next)
474 if (gld${EMULATION_NAME}_try_needed (search->name, lname))
475 break;
476 if (search != NULL)
477 continue;
478 }
479EOF
480if [ "x${host}" = "x${target}" ] ; then
481 case " ${EMULATION_LIBPATH} " in
482 *" ${EMULATION_NAME} "*)
483cat >>e${EMULATION_NAME}.c <<EOF
484 {
485 const char *lib_path;
486
487 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
488 if (gld${EMULATION_NAME}_search_needed (lib_path, lname))
489 continue;
490 }
491EOF
492 ;;
493 esac
494fi
495cat >>e${EMULATION_NAME}.c <<EOF
496 if (command_line.rpath != NULL)
497 {
498 for (search = search_head; search != NULL; search = search->next)
499 {
500 if (search->cmdline)
501 continue;
502 if (gld${EMULATION_NAME}_try_needed (search->name, lname))
503 break;
504 }
505 if (search != NULL)
506 continue;
507 }
508
509 einfo ("%P: warning: %s, needed by %B, not found\n",
510 l->name, l->by);
511 }
512}
513
514/* Search for a needed file in a path. */
515
516static bfd_boolean
517gld${EMULATION_NAME}_search_needed (path, name)
518 const char *path;
519 const char *name;
520{
521 const char *s;
522
523 if (path == NULL || *path == '\0')
524 return FALSE;
525 while (1)
526 {
527 const char *dir;
528 char *dircopy;
529
530 s = strchr (path, ':');
531 if (s == NULL)
532 {
533 dircopy = NULL;
534 dir = path;
535 }
536 else
537 {
538 dircopy = (char *) xmalloc (s - path + 1);
539 memcpy (dircopy, path, s - path);
540 dircopy[s - path] = '\0';
541 dir = dircopy;
542 }
543
544 if (gld${EMULATION_NAME}_try_needed (dir, name))
545 return TRUE;
546
547 if (dircopy != NULL)
548 free (dircopy);
549
550 if (s == NULL)
551 break;
552 path = s + 1;
553 }
554
555 return FALSE;
556}
557
558/* This function is called for each possible directory for a needed
559 dynamic object. */
560
561static bfd_boolean
562gld${EMULATION_NAME}_try_needed (dir, name)
563 const char *dir;
564 const char *name;
565{
566 char *file;
567 char *alc;
568 bfd_boolean ignore;
569 bfd *abfd;
570
571 file = gld${EMULATION_NAME}_search_dir (dir, name, &ignore);
572 if (file == NULL)
573 return FALSE;
574
575 alc = (char *) xmalloc (strlen (dir) + strlen (file) + 2);
576 sprintf (alc, "%s/%s", dir, file);
577 free (file);
578 abfd = bfd_openr (alc, bfd_get_target (output_bfd));
579 if (abfd == NULL)
580 return FALSE;
581 if (! bfd_check_format (abfd, bfd_object))
582 {
583 (void) bfd_close (abfd);
584 return FALSE;
585 }
586 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
587 {
588 (void) bfd_close (abfd);
589 return FALSE;
590 }
591
592 /* We've found the needed dynamic object. */
593
594 /* Add this file into the symbol table. */
595 if (! bfd_link_add_symbols (abfd, &link_info))
596 einfo ("%F%B: could not read symbols: %E\n", abfd);
597
598 return TRUE;
599}
600
601/* See if we have already included a needed object in the link. This
602 does not have to be precise, as it does no harm to include a
603 dynamic object more than once. */
604
605static void
606gld${EMULATION_NAME}_check_needed (s)
607 lang_input_statement_type *s;
608{
609 if (s->filename == NULL)
610 return;
611 if (strncmp (global_needed->name, "-l", 2) != 0)
612 {
613 if (strcmp (s->filename, global_needed->name) == 0)
614 global_found = TRUE;
615 }
616 else
617 {
618 const char *sname, *lname;
619 const char *sdot, *ldot;
620 int lmaj, lmin, smaj, smin;
621
622 lname = global_needed->name + 2;
623
624 sname = strrchr (s->filename, '/');
625 if (sname == NULL)
626 sname = s->filename;
627 else
628 ++sname;
629
630 if (strncmp (sname, "lib", 3) != 0)
631 return;
632 sname += 3;
633
634 ldot = strchr (lname, '.');
635 if (ldot == NULL)
636 ldot = lname + strlen (lname);
637
638 sdot = strstr (sname, ".so.");
639 if (sdot == NULL)
640 return;
641
642 if (sdot - sname != ldot - lname
643 || strncmp (lname, sname, sdot - sname) != 0)
644 return;
645
646 lmaj = lmin = -1;
647 sscanf (ldot, ".%d.%d", &lmaj, &lmin);
648 smaj = smin = -1;
649 sscanf (sdot, ".so.%d.%d", &smaj, &smin);
650 if ((smaj != lmaj && smaj != -1 && lmaj != -1)
651 || (smin != lmin && smin != -1 && lmin != -1))
652 return;
653
654 global_found = TRUE;
655 }
656}
657
658/* We need to use static variables to pass information around the call
659 to lang_for_each_statement. Ick. */
660
661static const char *find_assign;
662static bfd_boolean found_assign;
663
664/* We need to use static variables to pass information around the call
665 to lang_for_each_input_file. Ick. */
666
667static bfd_size_type need_size;
668static bfd_size_type need_entries;
669static bfd_byte *need_contents;
670static bfd_byte *need_pinfo;
671static bfd_byte *need_pnames;
672
673/* The size of one entry in the .need section, not including the file
674 name. */
675
676#define NEED_ENTRY_SIZE (16)
677
678/* This is called after the sections have been attached to output
679 sections, but before any sizes or addresses have been set. */
680
681static void
682gld${EMULATION_NAME}_before_allocation ()
683{
684 struct bfd_link_hash_entry *hdyn = NULL;
685 asection *sneed;
686 asection *srules;
687 asection *sdyn;
688
689 /* The SunOS native linker creates a shared library whenever there
690 are any undefined symbols in a link, unless -e is used. This is
691 pretty weird, but we are compatible. */
692 if (! link_info.shared && ! link_info.relocateable && ! entry_from_cmdline)
693 {
694 struct bfd_link_hash_entry *h;
695
696 for (h = link_info.hash->undefs; h != NULL; h = h->next)
697 {
698 if (h->type == bfd_link_hash_undefined
699 && h->u.undef.abfd != NULL
700 && (h->u.undef.abfd->flags & DYNAMIC) == 0
701 && strcmp (h->root.string, "__DYNAMIC") != 0
702 && strcmp (h->root.string, "__GLOBAL_OFFSET_TABLE_") != 0)
703 {
704 find_assign = h->root.string;
705 found_assign = FALSE;
706 lang_for_each_statement (gld${EMULATION_NAME}_find_assignment);
707 if (! found_assign)
708 {
709 link_info.shared = TRUE;
710 break;
711 }
712 }
713 }
714 }
715
716 if (link_info.shared)
717 {
718 lang_output_section_statement_type *os;
719
720 /* Set the .text section to start at 0x20, not 0x2020. FIXME:
721 This is too magical. */
722 os = lang_output_section_statement_lookup (".text");
723 if (os->addr_tree == NULL)
724 os->addr_tree = exp_intop (0x20);
725 }
726
727 /* We need to create a __DYNAMIC symbol. We don't do this in the
728 linker script because we want to set the value to the start of
729 the dynamic section if there is one, or to zero if there isn't
730 one. We need to create the symbol before calling
731 size_dynamic_sections, although we can't set the value until
732 afterward. */
733 if (! link_info.relocateable)
734 {
735 hdyn = bfd_link_hash_lookup (link_info.hash, "__DYNAMIC", TRUE, FALSE,
736 FALSE);
737 if (hdyn == NULL)
738 einfo ("%P%F: bfd_link_hash_lookup: %E\n");
739 if (! bfd_sunos_record_link_assignment (output_bfd, &link_info,
740 "__DYNAMIC"))
741 einfo ("%P%F: failed to record assignment to __DYNAMIC: %E\n");
742 }
743
744 /* If we are going to make any variable assignments, we need to let
745 the backend linker know about them in case the variables are
746 referred to by dynamic objects. */
747 lang_for_each_statement (gld${EMULATION_NAME}_find_assignment);
748
749 /* Let the backend linker work out the sizes of any sections
750 required by dynamic linking. */
751 if (! bfd_sunos_size_dynamic_sections (output_bfd, &link_info, &sdyn,
752 &sneed, &srules))
753 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
754
755 if (sneed != NULL)
756 {
757 /* Set up the .need section. See the description of the ld_need
758 field in include/aout/sun4.h. */
759
760 need_entries = 0;
761 need_size = 0;
762
763 lang_for_each_input_file (gld${EMULATION_NAME}_count_need);
764
765 /* We should only have a .need section if we have at least one
766 dynamic object. */
767 ASSERT (need_entries != 0);
768
769 sneed->_raw_size = need_size;
770 sneed->contents = (bfd_byte *) xmalloc (need_size);
771
772 need_contents = sneed->contents;
773 need_pinfo = sneed->contents;
774 need_pnames = sneed->contents + need_entries * 16;
775
776 lang_for_each_input_file (gld${EMULATION_NAME}_set_need);
777
778 ASSERT ((bfd_size_type) (need_pnames - sneed->contents) == need_size);
779 }
780
781 if (srules != NULL)
782 {
783 /* Set up the .rules section. This is just a PATH like string
784 of the -L arguments given on the command line. We permit the
785 user to specify the directories using the -rpath command line
786 option. */
787 if (command_line.rpath)
788 {
789 srules->_raw_size = strlen (command_line.rpath);
790 srules->contents = (bfd_byte *) command_line.rpath;
791 }
792 else
793 {
794 unsigned int size;
795 search_dirs_type *search;
796
797 size = 0;
798 for (search = search_head; search != NULL; search = search->next)
799 if (search->cmdline)
800 size += strlen (search->name) + 1;
801 srules->_raw_size = size;
802 if (size > 0)
803 {
804 char *p;
805
806 srules->contents = (bfd_byte *) xmalloc (size);
807 p = (char *) srules->contents;
808 *p = '\0';
809 for (search = search_head; search != NULL; search = search->next)
810 {
811 if (search->cmdline)
812 {
813 if (p != (char *) srules->contents)
814 *p++ = ':';
815 strcpy (p, search->name);
816 p += strlen (p);
817 }
818 }
819 }
820 }
821 }
822
823 /* We must assign a value to __DYNAMIC. It should be zero if we are
824 not doing a dynamic link, or the start of the .dynamic section if
825 we are doing one. */
826 if (! link_info.relocateable)
827 {
828 hdyn->type = bfd_link_hash_defined;
829 hdyn->u.def.value = 0;
830 if (sdyn != NULL)
831 hdyn->u.def.section = sdyn;
832 else
833 hdyn->u.def.section = bfd_abs_section_ptr;
834 }
835}
836
837/* This is called by the before_allocation routine via
838 lang_for_each_statement. It does one of two things: if the
839 variable find_assign is set, it sets found_assign if it finds an
840 assignment to that variable; otherwise it tells the backend linker
841 about all assignment statements, in case they are assignments to
842 symbols which are referred to by dynamic objects. */
843
844static void
845gld${EMULATION_NAME}_find_assignment (s)
846 lang_statement_union_type *s;
847{
848 if (s->header.type == lang_assignment_statement_enum
849 && (find_assign == NULL || ! found_assign))
850 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
851}
852
853/* Look through an expression for an assignment statement. */
854
855static void
856gld${EMULATION_NAME}_find_exp_assignment (exp)
857 etree_type *exp;
858{
859 switch (exp->type.node_class)
860 {
861 case etree_assign:
862 if (find_assign != NULL)
863 {
864 if (strcmp (find_assign, exp->assign.dst) == 0)
865 found_assign = TRUE;
866 return;
867 }
868
869 if (strcmp (exp->assign.dst, ".") != 0)
870 {
871 if (! bfd_sunos_record_link_assignment (output_bfd, &link_info,
872 exp->assign.dst))
873 einfo ("%P%F: failed to record assignment to %s: %E\n",
874 exp->assign.dst);
875 }
876 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
877 break;
878
879 case etree_binary:
880 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
881 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
882 break;
883
884 case etree_trinary:
885 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
886 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
887 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
888 break;
889
890 case etree_unary:
891 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
892 break;
893
894 default:
895 break;
896 }
897}
898
899/* Work out the size of the .need section, and the number of entries.
900 The backend will set the ld_need field of the dynamic linking
901 information to point to the .need section. See include/aout/sun4.h
902 for more information. */
903
904static void
905gld${EMULATION_NAME}_count_need (inp)
906 lang_input_statement_type *inp;
907{
908 if (inp->the_bfd != NULL
909 && (inp->the_bfd->flags & DYNAMIC) != 0)
910 {
911 ++need_entries;
912 need_size += NEED_ENTRY_SIZE;
913 if (! inp->is_archive)
914 need_size += strlen (inp->filename) + 1;
915 else
916 {
917 ASSERT (inp->local_sym_name[0] == '-'
918 && inp->local_sym_name[1] == 'l');
919 need_size += strlen (inp->local_sym_name + 2) + 1;
920 }
921 }
922}
923
924/* Fill in the contents of the .need section. */
925
926static void
927gld${EMULATION_NAME}_set_need (inp)
928 lang_input_statement_type *inp;
929{
930 if (inp->the_bfd != NULL
931 && (inp->the_bfd->flags & DYNAMIC) != 0)
932 {
933 bfd_size_type c;
934
935 /* To really fill in the .need section contents, we need to know
936 the final file position of the section, but we don't.
937 Instead, we use offsets, and rely on the BFD backend to
938 finish the section up correctly. FIXME: Talk about lack of
939 referential locality. */
940 bfd_put_32 (output_bfd, need_pnames - need_contents, need_pinfo);
941 if (! inp->is_archive)
942 {
943 bfd_put_32 (output_bfd, (bfd_vma) 0, need_pinfo + 4);
944 bfd_put_16 (output_bfd, (bfd_vma) 0, need_pinfo + 8);
945 bfd_put_16 (output_bfd, (bfd_vma) 0, need_pinfo + 10);
946 strcpy (need_pnames, inp->filename);
947 }
948 else
949 {
950 char *verstr;
951 int maj, min;
952
953 bfd_put_32 (output_bfd, (bfd_vma) 0x80000000, need_pinfo + 4);
954 maj = 0;
955 min = 0;
956 verstr = strstr (inp->filename, ".so.");
957 if (verstr != NULL)
958 sscanf (verstr, ".so.%d.%d", &maj, &min);
959 bfd_put_16 (output_bfd, (bfd_vma) maj, need_pinfo + 8);
960 bfd_put_16 (output_bfd, (bfd_vma) min, need_pinfo + 10);
961 strcpy (need_pnames, inp->local_sym_name + 2);
962 }
963
964 c = (need_pinfo - need_contents) / NEED_ENTRY_SIZE;
965 if (c + 1 >= need_entries)
966 bfd_put_32 (output_bfd, (bfd_vma) 0, need_pinfo + 12);
967 else
968 bfd_put_32 (output_bfd, (bfd_vma) (c + 1) * NEED_ENTRY_SIZE,
969 need_pinfo + 12);
970
971 need_pinfo += NEED_ENTRY_SIZE;
972 need_pnames += strlen (need_pnames) + 1;
973 }
974}
975
976static char *
977gld${EMULATION_NAME}_get_script(isfile)
978 int *isfile;
979EOF
980
981if test -n "$COMPILE_IN"
982then
983# Scripts compiled in.
984
985# sed commands to quote an ld script as a C string.
986sc="-f stringify.sed"
987
988cat >>e${EMULATION_NAME}.c <<EOF
989{
990 *isfile = 0;
991
992 if (link_info.relocateable && config.build_constructors)
993 return
994EOF
995sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
996echo ' ; else if (link_info.relocateable) return' >> e${EMULATION_NAME}.c
997sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
998echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
999sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1000echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1001sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1002echo ' ; else return' >> e${EMULATION_NAME}.c
1003sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1004echo '; }' >> e${EMULATION_NAME}.c
1005
1006else
1007# Scripts read from the filesystem.
1008
1009cat >>e${EMULATION_NAME}.c <<EOF
1010{
1011 *isfile = 1;
1012
1013 if (link_info.relocateable && config.build_constructors)
1014 return "ldscripts/${EMULATION_NAME}.xu";
1015 else if (link_info.relocateable)
1016 return "ldscripts/${EMULATION_NAME}.xr";
1017 else if (!config.text_read_only)
1018 return "ldscripts/${EMULATION_NAME}.xbn";
1019 else if (!config.magic_demand_paged)
1020 return "ldscripts/${EMULATION_NAME}.xn";
1021 else
1022 return "ldscripts/${EMULATION_NAME}.x";
1023}
1024EOF
1025
1026fi
1027
1028cat >>e${EMULATION_NAME}.c <<EOF
1029
1030struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1031{
1032 gld${EMULATION_NAME}_before_parse,
1033 syslib_default,
1034 hll_default,
1035 after_parse_default,
1036 gld${EMULATION_NAME}_after_open,
1037 after_allocation_default,
1038 set_output_arch_default,
1039 ldemul_default_target,
1040 gld${EMULATION_NAME}_before_allocation,
1041 gld${EMULATION_NAME}_get_script,
1042 "${EMULATION_NAME}",
1043 "${OUTPUT_FORMAT}",
1044 NULL, /* finish */
1045 gld${EMULATION_NAME}_create_output_section_statements,
1046 NULL, /* open dynamic archive */
1047 NULL, /* place orphan */
1048 gld${EMULATION_NAME}_set_symbols,
1049 NULL, /* parse args */
1050 NULL, /* add_options */
1051 NULL, /* handle_option */
1052 NULL, /* unrecognized file */
1053 NULL, /* list options */
1054 NULL, /* recognized file */
1055 NULL, /* find_potential_libraries */
1056 NULL /* new_vers_pattern */
1057};
1058EOF
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