bfd/
[deliverable/binutils-gdb.git] / ld / emultempl / elf32.em
1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 # This file is now misnamed, because it supports both 32 bit and 64 bit
4 # ELF emulations.
5 test -z "${ELFSIZE}" && ELFSIZE=32
6 if [ -z "$MACHINE" ]; then
7 OUTPUT_ARCH=${ARCH}
8 else
9 OUTPUT_ARCH=${ARCH}:${MACHINE}
10 fi
11 cat >e${EMULATION_NAME}.c <<EOF
12 /* This file is is generated by a shell script. DO NOT EDIT! */
13
14 /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004 Free Software Foundation, Inc.
17 Written by Steve Chamberlain <sac@cygnus.com>
18 ELF support by Ian Lance Taylor <ian@cygnus.com>
19
20 This file is part of GLD, the Gnu Linker.
21
22 This program is free software; you can redistribute it and/or modify
23 it under the terms of the GNU General Public License as published by
24 the Free Software Foundation; either version 2 of the License, or
25 (at your option) any later version.
26
27 This program is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 GNU General Public License for more details.
31
32 You should have received a copy of the GNU General Public License
33 along with this program; if not, write to the Free Software
34 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
35
36 #define TARGET_IS_${EMULATION_NAME}
37
38 #include "bfd.h"
39 #include "sysdep.h"
40 #include "libiberty.h"
41 #include "safe-ctype.h"
42 #include "getopt.h"
43
44 #include "bfdlink.h"
45
46 #include "ld.h"
47 #include "ldmain.h"
48 #include "ldmisc.h"
49 #include "ldexp.h"
50 #include "ldlang.h"
51 #include "ldfile.h"
52 #include "ldemul.h"
53 #include <ldgram.h>
54 #include "elf/common.h"
55
56 /* Declare functions used by various EXTRA_EM_FILEs. */
57 static void gld${EMULATION_NAME}_before_parse (void);
58 static void gld${EMULATION_NAME}_after_open (void);
59 static void gld${EMULATION_NAME}_before_allocation (void);
60 static bfd_boolean gld${EMULATION_NAME}_place_orphan
61 (lang_input_statement_type *file, asection *s);
62 static void gld${EMULATION_NAME}_finish (void);
63
64 EOF
65
66 # Import any needed special functions and/or overrides.
67 #
68 if test -n "$EXTRA_EM_FILE" ; then
69 . ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
70 fi
71
72 # Functions in this file can be overridden by setting the LDEMUL_* shell
73 # variables. If the name of the overriding function is the same as is
74 # defined in this file, then don't output this file's version.
75 # If a different overriding name is given then output the standard function
76 # as presumably it is called from the overriding function.
77 #
78 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
79 cat >>e${EMULATION_NAME}.c <<EOF
80
81 static void
82 gld${EMULATION_NAME}_before_parse (void)
83 {
84 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
85 config.dynamic_link = ${DYNAMIC_LINK-TRUE};
86 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
87 }
88
89 EOF
90 fi
91
92 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
93 cat >>e${EMULATION_NAME}.c <<EOF
94 /* Handle as_needed DT_NEEDED. */
95
96 static bfd_boolean
97 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
98 {
99 if (!entry->as_needed
100 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
101 return FALSE;
102
103 /* Tell the ELF linker that we don't want the output file to have a
104 DT_NEEDED entry for this file, unless it is used to resolve
105 references in a regular object. */
106 bfd_elf_set_dyn_lib_class (entry->the_bfd, DYN_AS_NEEDED);
107
108 /* Continue on with normal load_symbols processing. */
109 return FALSE;
110 }
111 EOF
112 fi
113
114 cat >>e${EMULATION_NAME}.c <<EOF
115
116 /* These variables are required to pass information back and forth
117 between after_open and check_needed and stat_needed and vercheck. */
118
119 static struct bfd_link_needed_list *global_needed;
120 static struct stat global_stat;
121 static bfd_boolean global_found;
122 static struct bfd_link_needed_list *global_vercheck_needed;
123 static bfd_boolean global_vercheck_failed;
124
125
126 /* On Linux, it's possible to have different versions of the same
127 shared library linked against different versions of libc. The
128 dynamic linker somehow tags which libc version to use in
129 /etc/ld.so.cache, and, based on the libc that it sees in the
130 executable, chooses which version of the shared library to use.
131
132 We try to do a similar check here by checking whether this shared
133 library needs any other shared libraries which may conflict with
134 libraries we have already included in the link. If it does, we
135 skip it, and try to find another shared library farther on down the
136 link path.
137
138 This is called via lang_for_each_input_file.
139 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
140 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
141 a conflicting version. */
142
143 static void
144 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
145 {
146 const char *soname;
147 struct bfd_link_needed_list *l;
148
149 if (global_vercheck_failed)
150 return;
151 if (s->the_bfd == NULL
152 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
153 return;
154
155 soname = bfd_elf_get_dt_soname (s->the_bfd);
156 if (soname == NULL)
157 soname = lbasename (bfd_get_filename (s->the_bfd));
158
159 for (l = global_vercheck_needed; l != NULL; l = l->next)
160 {
161 const char *suffix;
162
163 if (strcmp (soname, l->name) == 0)
164 {
165 /* Probably can't happen, but it's an easy check. */
166 continue;
167 }
168
169 if (strchr (l->name, '/') != NULL)
170 continue;
171
172 suffix = strstr (l->name, ".so.");
173 if (suffix == NULL)
174 continue;
175
176 suffix += sizeof ".so." - 1;
177
178 if (strncmp (soname, l->name, suffix - l->name) == 0)
179 {
180 /* Here we know that S is a dynamic object FOO.SO.VER1, and
181 the object we are considering needs a dynamic object
182 FOO.SO.VER2, and VER1 and VER2 are different. This
183 appears to be a version mismatch, so we tell the caller
184 to try a different version of this library. */
185 global_vercheck_failed = TRUE;
186 return;
187 }
188 }
189 }
190
191
192 /* See if an input file matches a DT_NEEDED entry by running stat on
193 the file. */
194
195 static void
196 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
197 {
198 struct stat st;
199 const char *suffix;
200 const char *soname;
201
202 if (global_found)
203 return;
204 if (s->the_bfd == NULL)
205 return;
206
207 if (bfd_stat (s->the_bfd, &st) != 0)
208 {
209 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
210 return;
211 }
212
213 if (st.st_dev == global_stat.st_dev
214 && st.st_ino == global_stat.st_ino)
215 {
216 global_found = TRUE;
217 return;
218 }
219
220 /* We issue a warning if it looks like we are including two
221 different versions of the same shared library. For example,
222 there may be a problem if -lc picks up libc.so.6 but some other
223 shared library has a DT_NEEDED entry of libc.so.5. This is a
224 heuristic test, and it will only work if the name looks like
225 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
226 If we really want to issue warnings about mixing version numbers
227 of shared libraries, we need to find a better way. */
228
229 if (strchr (global_needed->name, '/') != NULL)
230 return;
231 suffix = strstr (global_needed->name, ".so.");
232 if (suffix == NULL)
233 return;
234 suffix += sizeof ".so." - 1;
235
236 soname = bfd_elf_get_dt_soname (s->the_bfd);
237 if (soname == NULL)
238 soname = lbasename (s->filename);
239
240 if (strncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
241 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
242 global_needed->name, global_needed->by, soname);
243 }
244
245
246 /* This function is called for each possible name for a dynamic object
247 named by a DT_NEEDED entry. The FORCE parameter indicates whether
248 to skip the check for a conflicting version. */
249
250 static bfd_boolean
251 gld${EMULATION_NAME}_try_needed (const char *name, int force)
252 {
253 bfd *abfd;
254 const char *soname;
255
256 abfd = bfd_openr (name, bfd_get_target (output_bfd));
257 if (abfd == NULL)
258 return FALSE;
259 if (! bfd_check_format (abfd, bfd_object))
260 {
261 bfd_close (abfd);
262 return FALSE;
263 }
264 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
265 {
266 bfd_close (abfd);
267 return FALSE;
268 }
269
270 /* For DT_NEEDED, they have to match. */
271 if (abfd->xvec != output_bfd->xvec)
272 {
273 bfd_close (abfd);
274 return FALSE;
275 }
276
277 /* Check whether this object would include any conflicting library
278 versions. If FORCE is set, then we skip this check; we use this
279 the second time around, if we couldn't find any compatible
280 instance of the shared library. */
281
282 if (! force)
283 {
284 struct bfd_link_needed_list *needed;
285
286 if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
287 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
288
289 if (needed != NULL)
290 {
291 global_vercheck_needed = needed;
292 global_vercheck_failed = FALSE;
293 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
294 if (global_vercheck_failed)
295 {
296 bfd_close (abfd);
297 /* Return FALSE to force the caller to move on to try
298 another file on the search path. */
299 return FALSE;
300 }
301
302 /* But wait! It gets much worse. On Linux, if a shared
303 library does not use libc at all, we are supposed to skip
304 it the first time around in case we encounter a shared
305 library later on with the same name which does use the
306 version of libc that we want. This is much too horrible
307 to use on any system other than Linux. */
308
309 EOF
310 case ${target} in
311 *-*-linux-gnu*)
312 cat >>e${EMULATION_NAME}.c <<EOF
313 {
314 struct bfd_link_needed_list *l;
315
316 for (l = needed; l != NULL; l = l->next)
317 if (strncmp (l->name, "libc.so", 7) == 0)
318 break;
319 if (l == NULL)
320 {
321 bfd_close (abfd);
322 return FALSE;
323 }
324 }
325
326 EOF
327 ;;
328 esac
329 cat >>e${EMULATION_NAME}.c <<EOF
330 }
331 }
332
333 /* We've found a dynamic object matching the DT_NEEDED entry. */
334
335 /* We have already checked that there is no other input file of the
336 same name. We must now check again that we are not including the
337 same file twice. We need to do this because on many systems
338 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
339 reference libc.so.1. If we have already included libc.so, we
340 don't want to include libc.so.1 if they are the same file, and we
341 can only check that using stat. */
342
343 if (bfd_stat (abfd, &global_stat) != 0)
344 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
345
346 /* First strip off everything before the last '/'. */
347 soname = lbasename (abfd->filename);
348
349 if (trace_file_tries)
350 info_msg (_("found %s at %s\n"), soname, name);
351
352 global_found = FALSE;
353 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
354 if (global_found)
355 {
356 /* Return TRUE to indicate that we found the file, even though
357 we aren't going to do anything with it. */
358 return TRUE;
359 }
360
361 /* Specify the soname to use. */
362 bfd_elf_set_dt_needed_name (abfd, soname);
363
364 /* Tell the ELF linker that we don't want the output file to have a
365 DT_NEEDED entry for this file, unless it is used to resolve
366 references in a regular object. */
367 bfd_elf_set_dyn_lib_class (abfd, DYN_DT_NEEDED);
368
369 /* Add this file into the symbol table. */
370 if (! bfd_link_add_symbols (abfd, &link_info))
371 einfo ("%F%B: could not read symbols: %E\n", abfd);
372
373 return TRUE;
374 }
375
376
377 /* Search for a needed file in a path. */
378
379 static bfd_boolean
380 gld${EMULATION_NAME}_search_needed (const char *path, const char *name, int force)
381 {
382 const char *s;
383 size_t len;
384
385 if (name[0] == '/')
386 return gld${EMULATION_NAME}_try_needed (name, force);
387
388 if (path == NULL || *path == '\0')
389 return FALSE;
390 len = strlen (name);
391 while (1)
392 {
393 char *filename, *sset;
394
395 s = strchr (path, ':');
396 if (s == NULL)
397 s = path + strlen (path);
398
399 filename = (char *) xmalloc (s - path + len + 2);
400 if (s == path)
401 sset = filename;
402 else
403 {
404 memcpy (filename, path, s - path);
405 filename[s - path] = '/';
406 sset = filename + (s - path) + 1;
407 }
408 strcpy (sset, name);
409
410 if (gld${EMULATION_NAME}_try_needed (filename, force))
411 return TRUE;
412
413 free (filename);
414
415 if (*s == '\0')
416 break;
417 path = s + 1;
418 }
419
420 return FALSE;
421 }
422
423 EOF
424 if [ "x${USE_LIBPATH}" = xyes ] ; then
425 cat >>e${EMULATION_NAME}.c <<EOF
426
427 /* Add the sysroot to every entry in a colon-separated path. */
428
429 static char *
430 gld${EMULATION_NAME}_add_sysroot (const char *path)
431 {
432 int len, colons, i;
433 char *ret, *p;
434
435 len = strlen (path);
436 colons = 0;
437 i = 0;
438 while (path[i])
439 if (path[i++] == ':')
440 colons++;
441
442 if (path[i])
443 colons++;
444
445 len = len + (colons + 1) * strlen (ld_sysroot);
446 ret = xmalloc (len + 1);
447 strcpy (ret, ld_sysroot);
448 p = ret + strlen (ret);
449 i = 0;
450 while (path[i])
451 if (path[i] == ':')
452 {
453 *p++ = path[i++];
454 strcpy (p, ld_sysroot);
455 p = p + strlen (p);
456 }
457 else
458 *p++ = path[i++];
459
460 *p = 0;
461 return ret;
462 }
463
464 EOF
465 case ${target} in
466 *-*-linux-gnu*)
467 cat >>e${EMULATION_NAME}.c <<EOF
468 /* For a native linker, check the file /etc/ld.so.conf for directories
469 in which we may find shared libraries. /etc/ld.so.conf is really
470 only meaningful on Linux. */
471
472 static bfd_boolean
473 gld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force)
474 {
475 static bfd_boolean initialized;
476 static char *ld_so_conf;
477
478 if (! initialized)
479 {
480 FILE *f;
481 char *tmppath;
482
483 tmppath = concat (ld_sysroot, "/etc/ld.so.conf", NULL);
484 f = fopen (tmppath, FOPEN_RT);
485 free (tmppath);
486 if (f != NULL)
487 {
488 char *b;
489 size_t len, alloc;
490 int c;
491
492 len = 0;
493 alloc = 100;
494 b = (char *) xmalloc (alloc);
495
496 while ((c = getc (f)) != EOF)
497 {
498 if (len + 1 >= alloc)
499 {
500 alloc *= 2;
501 b = (char *) xrealloc (b, alloc);
502 }
503 if (c != ':'
504 && c != ' '
505 && c != '\t'
506 && c != '\n'
507 && c != ',')
508 {
509 b[len] = c;
510 ++len;
511 }
512 else
513 {
514 if (len > 0 && b[len - 1] != ':')
515 {
516 b[len] = ':';
517 ++len;
518 }
519 }
520 }
521
522 if (len > 0 && b[len - 1] == ':')
523 --len;
524
525 if (len > 0)
526 b[len] = '\0';
527 else
528 {
529 free (b);
530 b = NULL;
531 }
532
533 fclose (f);
534
535 if (b)
536 {
537 char *d = gld${EMULATION_NAME}_add_sysroot (b);
538 free (b);
539 b = d;
540 }
541
542 ld_so_conf = b;
543 }
544
545 initialized = TRUE;
546 }
547
548 if (ld_so_conf == NULL)
549 return FALSE;
550
551 return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force);
552 }
553
554 EOF
555 # Linux
556 ;;
557 esac
558 fi
559 cat >>e${EMULATION_NAME}.c <<EOF
560
561 /* See if an input file matches a DT_NEEDED entry by name. */
562
563 static void
564 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
565 {
566 if (global_found)
567 return;
568
569 if (s->filename != NULL)
570 {
571 const char *f;
572
573 if (strcmp (s->filename, global_needed->name) == 0)
574 {
575 global_found = TRUE;
576 return;
577 }
578
579 if (s->search_dirs_flag)
580 {
581 f = strrchr (s->filename, '/');
582 if (f != NULL
583 && strcmp (f + 1, global_needed->name) == 0)
584 {
585 global_found = TRUE;
586 return;
587 }
588 }
589 }
590
591 if (s->the_bfd != NULL)
592 {
593 const char *soname;
594
595 soname = bfd_elf_get_dt_soname (s->the_bfd);
596 if (soname != NULL
597 && strcmp (soname, global_needed->name) == 0)
598 {
599 global_found = TRUE;
600 return;
601 }
602 }
603 }
604
605 EOF
606
607 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
608 cat >>e${EMULATION_NAME}.c <<EOF
609
610 /* This is called after all the input files have been opened. */
611
612 static void
613 gld${EMULATION_NAME}_after_open (void)
614 {
615 struct bfd_link_needed_list *needed, *l;
616
617 /* We only need to worry about this when doing a final link. */
618 if (link_info.relocatable || !link_info.executable)
619 return;
620
621 /* Get the list of files which appear in DT_NEEDED entries in
622 dynamic objects included in the link (often there will be none).
623 For each such file, we want to track down the corresponding
624 library, and include the symbol table in the link. This is what
625 the runtime dynamic linker will do. Tracking the files down here
626 permits one dynamic object to include another without requiring
627 special action by the person doing the link. Note that the
628 needed list can actually grow while we are stepping through this
629 loop. */
630 needed = bfd_elf_get_needed_list (output_bfd, &link_info);
631 for (l = needed; l != NULL; l = l->next)
632 {
633 struct bfd_link_needed_list *ll;
634 int force;
635
636 /* If we've already seen this file, skip it. */
637 for (ll = needed; ll != l; ll = ll->next)
638 if (strcmp (ll->name, l->name) == 0)
639 break;
640 if (ll != l)
641 continue;
642
643 /* See if this file was included in the link explicitly. */
644 global_needed = l;
645 global_found = FALSE;
646 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
647 if (global_found)
648 continue;
649
650 if (trace_file_tries)
651 info_msg (_("%s needed by %B\n"), l->name, l->by);
652
653 /* We need to find this file and include the symbol table. We
654 want to search for the file in the same way that the dynamic
655 linker will search. That means that we want to use
656 rpath_link, rpath, then the environment variable
657 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
658 entries (native only), then the linker script LIB_SEARCH_DIRS.
659 We do not search using the -L arguments.
660
661 We search twice. The first time, we skip objects which may
662 introduce version mismatches. The second time, we force
663 their use. See gld${EMULATION_NAME}_vercheck comment. */
664 for (force = 0; force < 2; force++)
665 {
666 size_t len;
667 search_dirs_type *search;
668 EOF
669 if [ "x${USE_LIBPATH}" = xyes ] ; then
670 cat >>e${EMULATION_NAME}.c <<EOF
671 const char *lib_path;
672 struct bfd_link_needed_list *rp;
673 int found;
674 EOF
675 fi
676 cat >>e${EMULATION_NAME}.c <<EOF
677
678 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
679 l->name, force))
680 break;
681 EOF
682 if [ "x${USE_LIBPATH}" = xyes ] ; then
683 cat >>e${EMULATION_NAME}.c <<EOF
684 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
685 l->name, force))
686 break;
687 EOF
688 fi
689 if [ "x${NATIVE}" = xyes ] ; then
690 cat >>e${EMULATION_NAME}.c <<EOF
691 if (command_line.rpath_link == NULL
692 && command_line.rpath == NULL)
693 {
694 lib_path = (const char *) getenv ("LD_RUN_PATH");
695 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name,
696 force))
697 break;
698 }
699 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
700 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, force))
701 break;
702 EOF
703 fi
704 if [ "x${USE_LIBPATH}" = xyes ] ; then
705 cat >>e${EMULATION_NAME}.c <<EOF
706 found = 0;
707 rp = bfd_elf_get_runpath_list (output_bfd, &link_info);
708 for (; !found && rp != NULL; rp = rp->next)
709 {
710 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
711 found = (rp->by == l->by
712 && gld${EMULATION_NAME}_search_needed (tmpname,
713 l->name,
714 force));
715 free (tmpname);
716 }
717 if (found)
718 break;
719
720 EOF
721 fi
722 cat >>e${EMULATION_NAME}.c <<EOF
723 len = strlen (l->name);
724 for (search = search_head; search != NULL; search = search->next)
725 {
726 char *filename;
727
728 if (search->cmdline)
729 continue;
730 filename = (char *) xmalloc (strlen (search->name) + len + 2);
731 sprintf (filename, "%s/%s", search->name, l->name);
732 if (gld${EMULATION_NAME}_try_needed (filename, force))
733 break;
734 free (filename);
735 }
736 if (search != NULL)
737 break;
738 EOF
739 if [ "x${USE_LIBPATH}" = xyes ] ; then
740 case ${target} in
741 *-*-linux-gnu*)
742 cat >>e${EMULATION_NAME}.c <<EOF
743 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
744 break;
745 EOF
746 # Linux
747 ;;
748 esac
749 fi
750 cat >>e${EMULATION_NAME}.c <<EOF
751 }
752
753 if (force < 2)
754 continue;
755
756 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
757 l->name, l->by);
758 }
759 }
760
761 EOF
762 fi
763
764 cat >>e${EMULATION_NAME}.c <<EOF
765
766 /* Look through an expression for an assignment statement. */
767
768 static void
769 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
770 {
771 struct bfd_link_hash_entry *h;
772
773 switch (exp->type.node_class)
774 {
775 case etree_provide:
776 h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
777 FALSE, FALSE, FALSE);
778 if (h == NULL)
779 break;
780
781 /* We call record_link_assignment even if the symbol is defined.
782 This is because if it is defined by a dynamic object, we
783 actually want to use the value defined by the linker script,
784 not the value from the dynamic object (because we are setting
785 symbols like etext). If the symbol is defined by a regular
786 object, then, as it happens, calling record_link_assignment
787 will do no harm. */
788
789 /* Fall through. */
790 case etree_assign:
791 if (strcmp (exp->assign.dst, ".") != 0)
792 {
793 if (! (bfd_elf_record_link_assignment
794 (output_bfd, &link_info, exp->assign.dst,
795 exp->type.node_class == etree_provide ? TRUE : FALSE)))
796 einfo ("%P%F: failed to record assignment to %s: %E\n",
797 exp->assign.dst);
798 }
799 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
800 break;
801
802 case etree_binary:
803 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
804 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
805 break;
806
807 case etree_trinary:
808 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
809 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
810 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
811 break;
812
813 case etree_unary:
814 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
815 break;
816
817 default:
818 break;
819 }
820 }
821
822
823 /* This is called by the before_allocation routine via
824 lang_for_each_statement. It locates any assignment statements, and
825 tells the ELF backend about them, in case they are assignments to
826 symbols which are referred to by dynamic objects. */
827
828 static void
829 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
830 {
831 if (s->header.type == lang_assignment_statement_enum)
832 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
833 }
834
835 EOF
836
837 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
838 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
839 ELF_INTERPRETER_SET_DEFAULT="
840 if (sinterp != NULL)
841 {
842 sinterp->contents = ${ELF_INTERPRETER_NAME};
843 sinterp->_raw_size = strlen (sinterp->contents) + 1;
844 }
845
846 "
847 else
848 ELF_INTERPRETER_SET_DEFAULT=
849 fi
850 cat >>e${EMULATION_NAME}.c <<EOF
851
852 /* This is called after the sections have been attached to output
853 sections, but before any sizes or addresses have been set. */
854
855 static void
856 gld${EMULATION_NAME}_before_allocation (void)
857 {
858 const char *rpath;
859 asection *sinterp;
860
861 if (link_info.hash->type == bfd_link_elf_hash_table)
862 _bfd_elf_tls_setup (output_bfd, &link_info);
863
864 /* If we are going to make any variable assignments, we need to let
865 the ELF backend know about them in case the variables are
866 referred to by dynamic objects. */
867 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
868
869 /* Let the ELF backend work out the sizes of any sections required
870 by dynamic linking. */
871 rpath = command_line.rpath;
872 if (rpath == NULL)
873 rpath = (const char *) getenv ("LD_RUN_PATH");
874 if (! (bfd_elf_size_dynamic_sections
875 (output_bfd, command_line.soname, rpath,
876 command_line.filter_shlib,
877 (const char * const *) command_line.auxiliary_filters,
878 &link_info, &sinterp, lang_elf_version_info)))
879 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
880 ${ELF_INTERPRETER_SET_DEFAULT}
881 /* Let the user override the dynamic linker we are using. */
882 if (command_line.interpreter != NULL
883 && sinterp != NULL)
884 {
885 sinterp->contents = (bfd_byte *) command_line.interpreter;
886 sinterp->_raw_size = strlen (command_line.interpreter) + 1;
887 }
888
889 /* Look for any sections named .gnu.warning. As a GNU extensions,
890 we treat such sections as containing warning messages. We print
891 out the warning message, and then zero out the section size so
892 that it does not get copied into the output file. */
893
894 {
895 LANG_FOR_EACH_INPUT_STATEMENT (is)
896 {
897 asection *s;
898 bfd_size_type sz;
899 bfd_size_type prefix_len;
900 char *msg;
901 bfd_boolean ret;
902 const char * gnu_warning_prefix = _("warning: ");
903
904 if (is->just_syms_flag)
905 continue;
906
907 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
908 if (s == NULL)
909 continue;
910
911 sz = bfd_section_size (is->the_bfd, s);
912 prefix_len = strlen (gnu_warning_prefix);
913 msg = xmalloc ((size_t) (prefix_len + sz + 1));
914 strcpy (msg, gnu_warning_prefix);
915 if (! bfd_get_section_contents (is->the_bfd, s, msg + prefix_len,
916 (file_ptr) 0, sz))
917 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
918 is->the_bfd);
919 msg[prefix_len + sz] = '\0';
920 ret = link_info.callbacks->warning (&link_info, msg,
921 (const char *) NULL,
922 is->the_bfd, (asection *) NULL,
923 (bfd_vma) 0);
924 ASSERT (ret);
925 free (msg);
926
927 /* Clobber the section size, so that we don't waste copying the
928 warning into the output file. */
929 s->_raw_size = 0;
930 }
931 }
932 }
933
934 EOF
935 fi
936
937 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
938 cat >>e${EMULATION_NAME}.c <<EOF
939
940 /* Try to open a dynamic archive. This is where we know that ELF
941 dynamic libraries have an extension of .so (or .sl on oddball systems
942 like hpux). */
943
944 static bfd_boolean
945 gld${EMULATION_NAME}_open_dynamic_archive
946 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
947 {
948 const char *filename;
949 char *string;
950
951 if (! entry->is_archive)
952 return FALSE;
953
954 filename = entry->filename;
955
956 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
957 is defined, but it does not seem worth the headache to optimize
958 away those two bytes of space. */
959 string = (char *) xmalloc (strlen (search->name)
960 + strlen (filename)
961 + strlen (arch)
962 #ifdef EXTRA_SHLIB_EXTENSION
963 + strlen (EXTRA_SHLIB_EXTENSION)
964 #endif
965 + sizeof "/lib.so");
966
967 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
968
969 #ifdef EXTRA_SHLIB_EXTENSION
970 /* Try the .so extension first. If that fails build a new filename
971 using EXTRA_SHLIB_EXTENSION. */
972 if (! ldfile_try_open_bfd (string, entry))
973 sprintf (string, "%s/lib%s%s%s", search->name,
974 filename, arch, EXTRA_SHLIB_EXTENSION);
975 #endif
976
977 if (! ldfile_try_open_bfd (string, entry))
978 {
979 free (string);
980 return FALSE;
981 }
982
983 entry->filename = string;
984
985 /* We have found a dynamic object to include in the link. The ELF
986 backend linker will create a DT_NEEDED entry in the .dynamic
987 section naming this file. If this file includes a DT_SONAME
988 entry, it will be used. Otherwise, the ELF linker will just use
989 the name of the file. For an archive found by searching, like
990 this one, the DT_NEEDED entry should consist of just the name of
991 the file, without the path information used to find it. Note
992 that we only need to do this if we have a dynamic object; an
993 archive will never be referenced by a DT_NEEDED entry.
994
995 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
996 very pretty. I haven't been able to think of anything that is
997 pretty, though. */
998 if (bfd_check_format (entry->the_bfd, bfd_object)
999 && (entry->the_bfd->flags & DYNAMIC) != 0)
1000 {
1001 ASSERT (entry->is_archive && entry->search_dirs_flag);
1002
1003 /* Rather than duplicating the logic above. Just use the
1004 filename we recorded earlier. */
1005
1006 filename = lbasename (entry->filename);
1007 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1008 }
1009
1010 return TRUE;
1011 }
1012
1013 EOF
1014 fi
1015
1016 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1017 cat >>e${EMULATION_NAME}.c <<EOF
1018
1019 /* A variant of lang_output_section_find. Used by place_orphan. */
1020
1021 static lang_output_section_statement_type *
1022 output_rel_find (asection *sec, int isdyn)
1023 {
1024 lang_statement_union_type *u;
1025 lang_output_section_statement_type *lookup;
1026 lang_output_section_statement_type *last = NULL;
1027 lang_output_section_statement_type *last_alloc = NULL;
1028 lang_output_section_statement_type *last_rel = NULL;
1029 lang_output_section_statement_type *last_rel_alloc = NULL;
1030 int rela = sec->name[4] == 'a';
1031
1032 for (u = lang_output_section_statement.head; u; u = lookup->next)
1033 {
1034 lookup = &u->output_section_statement;
1035 if (lookup->constraint != -1
1036 && strncmp (".rel", lookup->name, 4) == 0)
1037 {
1038 int lookrela = lookup->name[4] == 'a';
1039
1040 /* .rel.dyn must come before all other reloc sections, to suit
1041 GNU ld.so. */
1042 if (isdyn)
1043 break;
1044
1045 /* Don't place after .rel.plt as doing so results in wrong
1046 dynamic tags. */
1047 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1048 break;
1049
1050 if (rela == lookrela || last_rel == NULL)
1051 last_rel = lookup;
1052 if ((rela == lookrela || last_rel_alloc == NULL)
1053 && lookup->bfd_section != NULL
1054 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1055 last_rel_alloc = lookup;
1056 }
1057
1058 last = lookup;
1059 if (lookup->bfd_section != NULL
1060 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1061 last_alloc = lookup;
1062 }
1063
1064 if (last_rel_alloc)
1065 return last_rel_alloc;
1066
1067 if (last_rel)
1068 return last_rel;
1069
1070 if (last_alloc)
1071 return last_alloc;
1072
1073 return last;
1074 }
1075
1076 /* Find the last output section before given output statement.
1077 Used by place_orphan. */
1078
1079 static asection *
1080 output_prev_sec_find (lang_output_section_statement_type *os)
1081 {
1082 asection *s = (asection *) NULL;
1083 lang_statement_union_type *u;
1084 lang_output_section_statement_type *lookup;
1085
1086 for (u = lang_output_section_statement.head;
1087 u != (lang_statement_union_type *) NULL;
1088 u = lookup->next)
1089 {
1090 lookup = &u->output_section_statement;
1091 if (lookup == os)
1092 return s;
1093
1094 if (lookup->bfd_section != NULL && lookup->bfd_section->owner != NULL)
1095 s = lookup->bfd_section;
1096 }
1097
1098 return NULL;
1099 }
1100
1101 /* Place an orphan section. We use this to put random SHF_ALLOC
1102 sections in the right segment. */
1103
1104 struct orphan_save {
1105 lang_output_section_statement_type *os;
1106 asection **section;
1107 lang_statement_union_type **stmt;
1108 lang_statement_union_type **os_tail;
1109 };
1110
1111 static bfd_boolean
1112 gld${EMULATION_NAME}_place_orphan (lang_input_statement_type *file, asection *s)
1113 {
1114 static struct orphan_save hold_text;
1115 static struct orphan_save hold_rodata;
1116 static struct orphan_save hold_data;
1117 static struct orphan_save hold_bss;
1118 static struct orphan_save hold_rel;
1119 static struct orphan_save hold_interp;
1120 static struct orphan_save hold_sdata;
1121 static int count = 1;
1122 struct orphan_save *place;
1123 lang_statement_list_type *old;
1124 lang_statement_list_type add;
1125 etree_type *address;
1126 const char *secname;
1127 const char *ps = NULL;
1128 lang_output_section_statement_type *os;
1129 lang_statement_union_type **os_tail;
1130 etree_type *load_base;
1131 int isdyn = 0;
1132
1133 secname = bfd_get_section_name (s->owner, s);
1134 if (! link_info.relocatable
1135 && link_info.combreloc
1136 && (s->flags & SEC_ALLOC)
1137 && strncmp (secname, ".rel", 4) == 0)
1138 {
1139 if (secname[4] == 'a')
1140 secname = ".rela.dyn";
1141 else
1142 secname = ".rel.dyn";
1143 isdyn = 1;
1144 }
1145
1146 if (isdyn || (!config.unique_orphan_sections && !unique_section_p (s)))
1147 {
1148 /* Look through the script to see where to place this section. */
1149 os = lang_output_section_find (secname);
1150
1151 if (os != NULL
1152 && (os->bfd_section == NULL
1153 || ((s->flags ^ os->bfd_section->flags)
1154 & (SEC_LOAD | SEC_ALLOC)) == 0))
1155 {
1156 /* We already have an output section statement with this
1157 name, and its bfd section, if any, has compatible flags. */
1158 lang_add_section (&os->children, s, os, file);
1159 return TRUE;
1160 }
1161 }
1162
1163 if (hold_text.os == NULL)
1164 hold_text.os = lang_output_section_find (".text");
1165
1166 /* If this is a final link, then always put .gnu.warning.SYMBOL
1167 sections into the .text section to get them out of the way. */
1168 if (link_info.executable
1169 && ! link_info.relocatable
1170 && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0
1171 && hold_text.os != NULL)
1172 {
1173 lang_add_section (&hold_text.os->children, s, hold_text.os, file);
1174 return TRUE;
1175 }
1176
1177 /* Decide which segment the section should go in based on the
1178 section name and section flags. We put loadable .note sections
1179 right after the .interp section, so that the PT_NOTE segment is
1180 stored right after the program headers where the OS can read it
1181 in the first page. */
1182 #define HAVE_SECTION(hold, name) \
1183 (hold.os != NULL || (hold.os = lang_output_section_find (name)) != NULL)
1184
1185 if (link_info.relocatable && (s->flags & SEC_DEBUGGING) == 0)
1186 s->flags &= ~SEC_EXCLUDE;
1187
1188 if ((s->flags & SEC_EXCLUDE) != 0)
1189 {
1190 if (s->output_section == NULL)
1191 s->output_section = bfd_abs_section_ptr;
1192 return TRUE;
1193 }
1194
1195 place = NULL;
1196 if ((s->flags & SEC_ALLOC) == 0)
1197 ;
1198 else if ((s->flags & SEC_LOAD) != 0
1199 && strncmp (secname, ".note", 5) == 0
1200 && HAVE_SECTION (hold_interp, ".interp"))
1201 place = &hold_interp;
1202 else if ((s->flags & SEC_HAS_CONTENTS) == 0
1203 && HAVE_SECTION (hold_bss, ".bss"))
1204 place = &hold_bss;
1205 else if ((s->flags & SEC_SMALL_DATA) != 0
1206 && HAVE_SECTION (hold_sdata, ".sdata"))
1207 place = &hold_sdata;
1208 else if ((s->flags & SEC_READONLY) == 0
1209 && HAVE_SECTION (hold_data, ".data"))
1210 place = &hold_data;
1211 else if (strncmp (secname, ".rel", 4) == 0
1212 && (s->flags & SEC_LOAD) != 0
1213 && (hold_rel.os != NULL
1214 || (hold_rel.os = output_rel_find (s, isdyn)) != NULL))
1215 place = &hold_rel;
1216 else if ((s->flags & (SEC_CODE | SEC_READONLY)) == SEC_READONLY
1217 && HAVE_SECTION (hold_rodata, ".rodata"))
1218 place = &hold_rodata;
1219 else if ((s->flags & (SEC_CODE | SEC_READONLY)) == (SEC_CODE | SEC_READONLY)
1220 && hold_text.os != NULL)
1221 place = &hold_text;
1222
1223 #undef HAVE_SECTION
1224
1225 /* Choose a unique name for the section. This will be needed if the
1226 same section name appears in the input file with different
1227 loadable or allocatable characteristics. */
1228 if (bfd_get_section_by_name (output_bfd, secname) != NULL)
1229 {
1230 secname = bfd_get_unique_section_name (output_bfd, secname, &count);
1231 if (secname == NULL)
1232 einfo ("%F%P: place_orphan failed: %E\n");
1233 }
1234
1235 /* Start building a list of statements for this section.
1236 First save the current statement pointer. */
1237 old = stat_ptr;
1238
1239 /* If we have found an appropriate place for the output section
1240 statements for this orphan, add them to our own private list,
1241 inserting them later into the global statement list. */
1242 if (place != NULL)
1243 {
1244 stat_ptr = &add;
1245 lang_list_init (stat_ptr);
1246 }
1247
1248 if (config.build_constructors)
1249 {
1250 /* If the name of the section is representable in C, then create
1251 symbols to mark the start and the end of the section. */
1252 for (ps = secname; *ps != '\0'; ps++)
1253 if (! ISALNUM (*ps) && *ps != '_')
1254 break;
1255 if (*ps == '\0')
1256 {
1257 char *symname;
1258 etree_type *e_align;
1259
1260 symname = (char *) xmalloc (ps - secname + sizeof "__start_");
1261 sprintf (symname, "__start_%s", secname);
1262 e_align = exp_unop (ALIGN_K,
1263 exp_intop ((bfd_vma) 1 << s->alignment_power));
1264 lang_add_assignment (exp_assop ('=', symname, e_align));
1265 }
1266 }
1267
1268 address = NULL;
1269 if (link_info.relocatable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)
1270 address = exp_intop ((bfd_vma) 0);
1271
1272 load_base = NULL;
1273 if (place != NULL && place->os->load_base != NULL)
1274 {
1275 etree_type *lma_from_vma;
1276 lma_from_vma = exp_binop ('-', place->os->load_base,
1277 exp_nameop (ADDR, place->os->name));
1278 load_base = exp_binop ('+', lma_from_vma,
1279 exp_nameop (ADDR, secname));
1280 }
1281
1282 os_tail = lang_output_section_statement.tail;
1283 os = lang_enter_output_section_statement (secname, address, 0,
1284 (etree_type *) NULL,
1285 (etree_type *) NULL,
1286 load_base, 0);
1287
1288 lang_add_section (&os->children, s, os, file);
1289
1290 lang_leave_output_section_statement
1291 ((bfd_vma) 0, "*default*",
1292 (struct lang_output_section_phdr_list *) NULL, NULL);
1293
1294 if (config.build_constructors && *ps == '\0')
1295 {
1296 char *symname;
1297
1298 /* lang_leave_ouput_section_statement resets stat_ptr. Put
1299 stat_ptr back where we want it. */
1300 if (place != NULL)
1301 stat_ptr = &add;
1302
1303 symname = (char *) xmalloc (ps - secname + sizeof "__stop_");
1304 sprintf (symname, "__stop_%s", secname);
1305 lang_add_assignment (exp_assop ('=', symname,
1306 exp_nameop (NAME, ".")));
1307 }
1308
1309 /* Restore the global list pointer. */
1310 stat_ptr = old;
1311
1312 if (place != NULL && os->bfd_section != NULL)
1313 {
1314 asection *snew, **pps;
1315
1316 snew = os->bfd_section;
1317
1318 /* Shuffle the bfd section list to make the output file look
1319 neater. This is really only cosmetic. */
1320 if (place->section == NULL)
1321 {
1322 asection *bfd_section = place->os->bfd_section;
1323
1324 /* If the output statement hasn't been used to place
1325 any input sections (and thus doesn't have an output
1326 bfd_section), look for the closest prior output statement
1327 having an output section. */
1328 if (bfd_section == NULL)
1329 bfd_section = output_prev_sec_find (place->os);
1330
1331 if (bfd_section != NULL && bfd_section != snew)
1332 place->section = &bfd_section->next;
1333 }
1334
1335 if (place->section != NULL)
1336 {
1337 /* Unlink the section. */
1338 for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
1339 ;
1340 bfd_section_list_remove (output_bfd, pps);
1341
1342 /* Now tack it on to the "place->os" section list. */
1343 bfd_section_list_insert (output_bfd, place->section, snew);
1344 }
1345
1346 /* Save the end of this list. Further ophans of this type will
1347 follow the one we've just added. */
1348 place->section = &snew->next;
1349
1350 /* The following is non-cosmetic. We try to put the output
1351 statements in some sort of reasonable order here, because
1352 they determine the final load addresses of the orphan
1353 sections. In addition, placing output statements in the
1354 wrong order may require extra segments. For instance,
1355 given a typical situation of all read-only sections placed
1356 in one segment and following that a segment containing all
1357 the read-write sections, we wouldn't want to place an orphan
1358 read/write section before or amongst the read-only ones. */
1359 if (add.head != NULL)
1360 {
1361 lang_statement_union_type *newly_added_os;
1362
1363 if (place->stmt == NULL)
1364 {
1365 /* Put the new statement list right at the head. */
1366 *add.tail = place->os->header.next;
1367 place->os->header.next = add.head;
1368
1369 place->os_tail = &place->os->next;
1370 }
1371 else
1372 {
1373 /* Put it after the last orphan statement we added. */
1374 *add.tail = *place->stmt;
1375 *place->stmt = add.head;
1376 }
1377
1378 /* Fix the global list pointer if we happened to tack our
1379 new list at the tail. */
1380 if (*old->tail == add.head)
1381 old->tail = add.tail;
1382
1383 /* Save the end of this list. */
1384 place->stmt = add.tail;
1385
1386 /* Do the same for the list of output section statements. */
1387 newly_added_os = *os_tail;
1388 *os_tail = NULL;
1389 newly_added_os->output_section_statement.next = *place->os_tail;
1390 *place->os_tail = newly_added_os;
1391 place->os_tail = &newly_added_os->output_section_statement.next;
1392
1393 /* Fixing the global list pointer here is a little different.
1394 We added to the list in lang_enter_output_section_statement,
1395 trimmed off the new output_section_statment above when
1396 assigning *os_tail = NULL, but possibly added it back in
1397 the same place when assigning *place->os_tail. */
1398 if (*os_tail == NULL)
1399 lang_output_section_statement.tail = os_tail;
1400 }
1401 }
1402
1403 return TRUE;
1404 }
1405 EOF
1406 fi
1407
1408 if test x"$LDEMUL_FINISH" != xgld"$EMULATION_NAME"_finish; then
1409 cat >>e${EMULATION_NAME}.c <<EOF
1410
1411 static void
1412 gld${EMULATION_NAME}_finish (void)
1413 {
1414 if (bfd_elf_discard_info (output_bfd, &link_info))
1415 {
1416 lang_reset_memory_regions ();
1417
1418 /* Resize the sections. */
1419 lang_size_sections (stat_ptr->head, abs_output_section,
1420 &stat_ptr->head, 0, (bfd_vma) 0, NULL, TRUE);
1421
1422 /* Redo special stuff. */
1423 ldemul_after_allocation ();
1424
1425 /* Do the assignments again. */
1426 lang_do_assignments (stat_ptr->head, abs_output_section,
1427 (fill_type *) 0, (bfd_vma) 0);
1428 }
1429 }
1430 EOF
1431 fi
1432
1433 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1434 cat >>e${EMULATION_NAME}.c <<EOF
1435
1436 static char *
1437 gld${EMULATION_NAME}_get_script (int *isfile)
1438 EOF
1439
1440 if test -n "$COMPILE_IN"
1441 then
1442 # Scripts compiled in.
1443
1444 # sed commands to quote an ld script as a C string.
1445 sc="-f stringify.sed"
1446
1447 cat >>e${EMULATION_NAME}.c <<EOF
1448 {
1449 *isfile = 0;
1450
1451 if (link_info.relocatable && config.build_constructors)
1452 return
1453 EOF
1454 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1455 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1456 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1457 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1458 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1459 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1460 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1461 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1462 fi
1463 if test -n "$GENERATE_PIE_SCRIPT" ; then
1464 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1465 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
1466 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1467 echo ' && (link_info.flags & DT_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1468 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
1469 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1470 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
1471 fi
1472 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
1473 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
1474 fi
1475 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1476 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1477 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
1478 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1479 echo ' && (link_info.flags & DT_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1480 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
1481 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1482 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
1483 fi
1484 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1485 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1486 fi
1487 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1488 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
1489 echo ' && (link_info.flags & DT_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1490 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
1491 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
1492 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
1493 fi
1494 echo ' ; else return' >> e${EMULATION_NAME}.c
1495 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1496 echo '; }' >> e${EMULATION_NAME}.c
1497
1498 else
1499 # Scripts read from the filesystem.
1500
1501 cat >>e${EMULATION_NAME}.c <<EOF
1502 {
1503 *isfile = 1;
1504
1505 if (link_info.relocatable && config.build_constructors)
1506 return "ldscripts/${EMULATION_NAME}.xu";
1507 else if (link_info.relocatable)
1508 return "ldscripts/${EMULATION_NAME}.xr";
1509 else if (!config.text_read_only)
1510 return "ldscripts/${EMULATION_NAME}.xbn";
1511 EOF
1512 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
1513 else
1514 cat >>e${EMULATION_NAME}.c <<EOF
1515 else if (!config.magic_demand_paged)
1516 return "ldscripts/${EMULATION_NAME}.xn";
1517 EOF
1518 fi
1519 if test -n "$GENERATE_PIE_SCRIPT" ; then
1520 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1521 cat >>e${EMULATION_NAME}.c <<EOF
1522 else if (link_info.pie && link_info.combreloc
1523 && link_info.relro && (link_info.flags & DT_BIND_NOW))
1524 return "ldscripts/${EMULATION_NAME}.xdw";
1525 else if (link_info.pie && link_info.combreloc)
1526 return "ldscripts/${EMULATION_NAME}.xdc";
1527 EOF
1528 fi
1529 cat >>e${EMULATION_NAME}.c <<EOF
1530 else if (link_info.pie)
1531 return "ldscripts/${EMULATION_NAME}.xd";
1532 EOF
1533 fi
1534 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1535 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1536 cat >>e${EMULATION_NAME}.c <<EOF
1537 else if (link_info.shared && link_info.combreloc
1538 && link_info.relro && (link_info.flags & DT_BIND_NOW))
1539 return "ldscripts/${EMULATION_NAME}.xsw";
1540 else if (link_info.shared && link_info.combreloc)
1541 return "ldscripts/${EMULATION_NAME}.xsc";
1542 EOF
1543 fi
1544 cat >>e${EMULATION_NAME}.c <<EOF
1545 else if (link_info.shared)
1546 return "ldscripts/${EMULATION_NAME}.xs";
1547 EOF
1548 fi
1549 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1550 cat >>e${EMULATION_NAME}.c <<EOF
1551 else if (link_info.combreloc && link_info.relro
1552 && (link_info.flags & DT_BIND_NOW))
1553 return "ldscripts/${EMULATION_NAME}.xw";
1554 else if (link_info.combreloc)
1555 return "ldscripts/${EMULATION_NAME}.xc";
1556 EOF
1557 fi
1558 cat >>e${EMULATION_NAME}.c <<EOF
1559 else
1560 return "ldscripts/${EMULATION_NAME}.x";
1561 }
1562
1563 EOF
1564 fi
1565 fi
1566
1567 if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1568
1569 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
1570 cat >>e${EMULATION_NAME}.c <<EOF
1571 $PARSE_AND_LIST_PROLOGUE
1572 EOF
1573 fi
1574
1575 cat >>e${EMULATION_NAME}.c <<EOF
1576
1577 #define OPTION_DISABLE_NEW_DTAGS (400)
1578 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
1579 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
1580 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
1581
1582 static void
1583 gld${EMULATION_NAME}_add_options
1584 (int ns, char **shortopts, int nl, struct option **longopts,
1585 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
1586 {
1587 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
1588 static const struct option xtra_long[] = {
1589 EOF
1590
1591 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1592 cat >>e${EMULATION_NAME}.c <<EOF
1593 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
1594 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
1595 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
1596 {"Bgroup", no_argument, NULL, OPTION_GROUP},
1597 EOF
1598 fi
1599
1600 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
1601 cat >>e${EMULATION_NAME}.c <<EOF
1602 $PARSE_AND_LIST_LONGOPTS
1603 EOF
1604 fi
1605
1606 cat >>e${EMULATION_NAME}.c <<EOF
1607 {NULL, no_argument, NULL, 0}
1608 };
1609
1610 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
1611 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
1612 *longopts = (struct option *)
1613 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
1614 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
1615 }
1616
1617 static bfd_boolean
1618 gld${EMULATION_NAME}_handle_option (int optc)
1619 {
1620 switch (optc)
1621 {
1622 default:
1623 return FALSE;
1624
1625 EOF
1626
1627 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1628 cat >>e${EMULATION_NAME}.c <<EOF
1629 case OPTION_DISABLE_NEW_DTAGS:
1630 link_info.new_dtags = FALSE;
1631 break;
1632
1633 case OPTION_ENABLE_NEW_DTAGS:
1634 link_info.new_dtags = TRUE;
1635 break;
1636
1637 case OPTION_EH_FRAME_HDR:
1638 link_info.eh_frame_hdr = TRUE;
1639 break;
1640
1641 case OPTION_GROUP:
1642 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
1643 /* Groups must be self-contained. */
1644 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
1645 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
1646 break;
1647
1648 case 'z':
1649 if (strcmp (optarg, "initfirst") == 0)
1650 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
1651 else if (strcmp (optarg, "interpose") == 0)
1652 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
1653 else if (strcmp (optarg, "loadfltr") == 0)
1654 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
1655 else if (strcmp (optarg, "nodefaultlib") == 0)
1656 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
1657 else if (strcmp (optarg, "nodelete") == 0)
1658 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
1659 else if (strcmp (optarg, "nodlopen") == 0)
1660 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
1661 else if (strcmp (optarg, "nodump") == 0)
1662 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
1663 else if (strcmp (optarg, "now") == 0)
1664 {
1665 link_info.flags |= (bfd_vma) DF_BIND_NOW;
1666 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
1667 }
1668 else if (strcmp (optarg, "origin") == 0)
1669 {
1670 link_info.flags |= (bfd_vma) DF_ORIGIN;
1671 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
1672 }
1673 else if (strcmp (optarg, "defs") == 0)
1674 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
1675 else if (strcmp (optarg, "muldefs") == 0)
1676 link_info.allow_multiple_definition = TRUE;
1677 else if (strcmp (optarg, "combreloc") == 0)
1678 link_info.combreloc = TRUE;
1679 else if (strcmp (optarg, "nocombreloc") == 0)
1680 link_info.combreloc = FALSE;
1681 else if (strcmp (optarg, "nocopyreloc") == 0)
1682 link_info.nocopyreloc = TRUE;
1683 else if (strcmp (optarg, "execstack") == 0)
1684 {
1685 link_info.execstack = TRUE;
1686 link_info.noexecstack = FALSE;
1687 }
1688 else if (strcmp (optarg, "noexecstack") == 0)
1689 {
1690 link_info.noexecstack = TRUE;
1691 link_info.execstack = FALSE;
1692 }
1693 else if (strcmp (optarg, "relro") == 0)
1694 link_info.relro = TRUE;
1695 else if (strcmp (optarg, "norelro") == 0)
1696 link_info.relro = FALSE;
1697 /* What about the other Solaris -z options? FIXME. */
1698 break;
1699 EOF
1700 fi
1701
1702 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
1703 cat >>e${EMULATION_NAME}.c <<EOF
1704 $PARSE_AND_LIST_ARGS_CASES
1705 EOF
1706 fi
1707
1708 cat >>e${EMULATION_NAME}.c <<EOF
1709 }
1710
1711 return TRUE;
1712 }
1713
1714 EOF
1715
1716 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
1717 cat >>e${EMULATION_NAME}.c <<EOF
1718
1719 static void
1720 gld${EMULATION_NAME}_list_options (FILE * file)
1721 {
1722 EOF
1723
1724 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1725 cat >>e${EMULATION_NAME}.c <<EOF
1726 fprintf (file, _(" -Bgroup\t\tSelects group name lookup rules for DSO\n"));
1727 fprintf (file, _(" --disable-new-dtags\tDisable new dynamic tags\n"));
1728 fprintf (file, _(" --enable-new-dtags\tEnable new dynamic tags\n"));
1729 fprintf (file, _(" --eh-frame-hdr\tCreate .eh_frame_hdr section\n"));
1730 fprintf (file, _(" -z combreloc\t\tMerge dynamic relocs into one section and sort\n"));
1731 fprintf (file, _(" -z defs\t\tReport unresolved symbols in object files.\n"));
1732 fprintf (file, _(" -z execstack\t\tMark executable as requiring executable stack\n"));
1733 fprintf (file, _(" -z initfirst\t\tMark DSO to be initialized first at runtime\n"));
1734 fprintf (file, _(" -z interpose\t\tMark object to interpose all DSOs but executable\n"));
1735 fprintf (file, _(" -z loadfltr\t\tMark object requiring immediate process\n"));
1736 fprintf (file, _(" -z muldefs\t\tAllow multiple definitions\n"));
1737 fprintf (file, _(" -z nocombreloc\tDon't merge dynamic relocs into one section\n"));
1738 fprintf (file, _(" -z nocopyreloc\tDon't create copy relocs\n"));
1739 fprintf (file, _(" -z nodefaultlib\tMark object not to use default search paths\n"));
1740 fprintf (file, _(" -z nodelete\t\tMark DSO non-deletable at runtime\n"));
1741 fprintf (file, _(" -z nodlopen\t\tMark DSO not available to dlopen\n"));
1742 fprintf (file, _(" -z nodump\t\tMark DSO not available to dldump\n"));
1743 fprintf (file, _(" -z noexecstack\tMark executable as not requiring executable stack\n"));
1744 fprintf (file, _(" -z norelro\t\tDon't create RELRO program header\n"));
1745 fprintf (file, _(" -z now\t\tMark object non-lazy runtime binding\n"));
1746 fprintf (file, _(" -z origin\t\tMark object requiring immediate \$ORIGIN processing\n\t\t\t at runtime\n"));
1747 fprintf (file, _(" -z relro\t\tCreate RELRO program header\n"));
1748 fprintf (file, _(" -z KEYWORD\t\tIgnored for Solaris compatibility\n"));
1749 EOF
1750 fi
1751
1752 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
1753 cat >>e${EMULATION_NAME}.c <<EOF
1754 $PARSE_AND_LIST_OPTIONS
1755 EOF
1756 fi
1757
1758 cat >>e${EMULATION_NAME}.c <<EOF
1759 }
1760 EOF
1761
1762 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
1763 cat >>e${EMULATION_NAME}.c <<EOF
1764 $PARSE_AND_LIST_EPILOGUE
1765 EOF
1766 fi
1767 fi
1768 else
1769 cat >>e${EMULATION_NAME}.c <<EOF
1770 #define gld${EMULATION_NAME}_add_options NULL
1771 #define gld${EMULATION_NAME}_handle_option NULL
1772 EOF
1773 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
1774 cat >>e${EMULATION_NAME}.c <<EOF
1775 #define gld${EMULATION_NAME}_list_options NULL
1776 EOF
1777 fi
1778 fi
1779
1780 cat >>e${EMULATION_NAME}.c <<EOF
1781
1782 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1783 {
1784 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
1785 ${LDEMUL_SYSLIB-syslib_default},
1786 ${LDEMUL_HLL-hll_default},
1787 ${LDEMUL_AFTER_PARSE-after_parse_default},
1788 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
1789 ${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
1790 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
1791 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
1792 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
1793 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
1794 "${EMULATION_NAME}",
1795 "${OUTPUT_FORMAT}",
1796 ${LDEMUL_FINISH-gld${EMULATION_NAME}_finish},
1797 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
1798 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
1799 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
1800 ${LDEMUL_SET_SYMBOLS-NULL},
1801 ${LDEMUL_PARSE_ARGS-NULL},
1802 gld${EMULATION_NAME}_add_options,
1803 gld${EMULATION_NAME}_handle_option,
1804 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
1805 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
1806 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
1807 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
1808 ${LDEMUL_NEW_VERS_PATTERN-NULL}
1809 };
1810 EOF
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