* ldlang.h (lang_output_section_find): Define.
[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 fragment <<EOF
12 /* This file is is generated by a shell script. DO NOT EDIT! */
13
14 /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
17 Written by Steve Chamberlain <sac@cygnus.com>
18 ELF support by Ian Lance Taylor <ian@cygnus.com>
19
20 This file is part of the GNU Binutils.
21
22 This program is free software; you can redistribute it and/or modify
23 it under the terms of the GNU General Public License as published by
24 the Free Software Foundation; either version 3 of the License, or
25 (at your option) any later version.
26
27 This program is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 GNU General Public License for more details.
31
32 You should have received a copy of the GNU General Public License
33 along with this program; if not, write to the Free Software
34 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
35 MA 02110-1301, USA. */
36
37 #define TARGET_IS_${EMULATION_NAME}
38
39 #include "sysdep.h"
40 #include "bfd.h"
41 #include "libiberty.h"
42 #include "safe-ctype.h"
43 #include "getopt.h"
44 #include "md5.h"
45 #include "sha1.h"
46 #include <fcntl.h>
47
48 #include "bfdlink.h"
49
50 #include "ld.h"
51 #include "ldmain.h"
52 #include "ldmisc.h"
53 #include "ldexp.h"
54 #include "ldlang.h"
55 #include "ldfile.h"
56 #include "ldemul.h"
57 #include <ldgram.h>
58 #include "elf/common.h"
59 #include "elf-bfd.h"
60
61 /* Declare functions used by various EXTRA_EM_FILEs. */
62 static void gld${EMULATION_NAME}_before_parse (void);
63 static void gld${EMULATION_NAME}_after_open (void);
64 static void gld${EMULATION_NAME}_before_allocation (void);
65 static bfd_boolean gld${EMULATION_NAME}_place_orphan (asection *s);
66 static void gld${EMULATION_NAME}_finish (void);
67
68 EOF
69
70 if [ "x${USE_LIBPATH}" = xyes ] ; then
71 case ${target} in
72 *-*-linux-* | *-*-k*bsd*-*)
73 fragment <<EOF
74 #ifdef HAVE_GLOB
75 #include <glob.h>
76 #endif
77 EOF
78 ;;
79 esac
80 fi
81
82 # Import any needed special functions and/or overrides.
83 #
84 source_em ${srcdir}/emultempl/elf-generic.em
85 if test -n "$EXTRA_EM_FILE" ; then
86 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
87 fi
88
89 # Functions in this file can be overridden by setting the LDEMUL_* shell
90 # variables. If the name of the overriding function is the same as is
91 # defined in this file, then don't output this file's version.
92 # If a different overriding name is given then output the standard function
93 # as presumably it is called from the overriding function.
94 #
95 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
96 fragment <<EOF
97
98 static void
99 gld${EMULATION_NAME}_before_parse (void)
100 {
101 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
102 config.dynamic_link = ${DYNAMIC_LINK-TRUE};
103 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
104 }
105
106 EOF
107 fi
108
109 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
110 fragment <<EOF
111 /* Handle as_needed DT_NEEDED. */
112
113 static bfd_boolean
114 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
115 {
116 int class = 0;
117
118 /* Tell the ELF linker that we don't want the output file to have a
119 DT_NEEDED entry for this file, unless it is used to resolve
120 references in a regular object. */
121 if (entry->as_needed)
122 class = DYN_AS_NEEDED;
123
124 /* Tell the ELF linker that we don't want the output file to have a
125 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
126 this file at all. */
127 if (!entry->add_needed)
128 class |= DYN_NO_ADD_NEEDED;
129
130 if (entry->just_syms_flag
131 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
132 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
133 entry->the_bfd);
134
135 if (!class
136 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
137 return FALSE;
138
139 bfd_elf_set_dyn_lib_class (entry->the_bfd, class);
140
141 /* Continue on with normal load_symbols processing. */
142 return FALSE;
143 }
144 EOF
145 fi
146
147 fragment <<EOF
148
149 /* These variables are required to pass information back and forth
150 between after_open and check_needed and stat_needed and vercheck. */
151
152 static struct bfd_link_needed_list *global_needed;
153 static struct stat global_stat;
154 static lang_input_statement_type *global_found;
155 static struct bfd_link_needed_list *global_vercheck_needed;
156 static bfd_boolean global_vercheck_failed;
157
158
159 /* On Linux, it's possible to have different versions of the same
160 shared library linked against different versions of libc. The
161 dynamic linker somehow tags which libc version to use in
162 /etc/ld.so.cache, and, based on the libc that it sees in the
163 executable, chooses which version of the shared library to use.
164
165 We try to do a similar check here by checking whether this shared
166 library needs any other shared libraries which may conflict with
167 libraries we have already included in the link. If it does, we
168 skip it, and try to find another shared library farther on down the
169 link path.
170
171 This is called via lang_for_each_input_file.
172 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
173 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
174 a conflicting version. */
175
176 static void
177 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
178 {
179 const char *soname;
180 struct bfd_link_needed_list *l;
181
182 if (global_vercheck_failed)
183 return;
184 if (s->the_bfd == NULL
185 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
186 return;
187
188 soname = bfd_elf_get_dt_soname (s->the_bfd);
189 if (soname == NULL)
190 soname = lbasename (bfd_get_filename (s->the_bfd));
191
192 for (l = global_vercheck_needed; l != NULL; l = l->next)
193 {
194 const char *suffix;
195
196 if (strcmp (soname, l->name) == 0)
197 {
198 /* Probably can't happen, but it's an easy check. */
199 continue;
200 }
201
202 if (strchr (l->name, '/') != NULL)
203 continue;
204
205 suffix = strstr (l->name, ".so.");
206 if (suffix == NULL)
207 continue;
208
209 suffix += sizeof ".so." - 1;
210
211 if (strncmp (soname, l->name, suffix - l->name) == 0)
212 {
213 /* Here we know that S is a dynamic object FOO.SO.VER1, and
214 the object we are considering needs a dynamic object
215 FOO.SO.VER2, and VER1 and VER2 are different. This
216 appears to be a version mismatch, so we tell the caller
217 to try a different version of this library. */
218 global_vercheck_failed = TRUE;
219 return;
220 }
221 }
222 }
223
224
225 /* See if an input file matches a DT_NEEDED entry by running stat on
226 the file. */
227
228 static void
229 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
230 {
231 struct stat st;
232 const char *suffix;
233 const char *soname;
234
235 if (global_found != NULL)
236 return;
237 if (s->the_bfd == NULL)
238 return;
239
240 /* If this input file was an as-needed entry, and wasn't found to be
241 needed at the stage it was linked, then don't say we have loaded it. */
242 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
243 return;
244
245 if (bfd_stat (s->the_bfd, &st) != 0)
246 {
247 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
248 return;
249 }
250
251 /* Some operating systems, e.g. Windows, do not provide a meaningful
252 st_ino; they always set it to zero. (Windows does provide a
253 meaningful st_dev.) Do not indicate a duplicate library in that
254 case. While there is no guarantee that a system that provides
255 meaningful inode numbers will never set st_ino to zero, this is
256 merely an optimization, so we do not need to worry about false
257 negatives. */
258 if (st.st_dev == global_stat.st_dev
259 && st.st_ino == global_stat.st_ino
260 && st.st_ino != 0)
261 {
262 global_found = s;
263 return;
264 }
265
266 /* We issue a warning if it looks like we are including two
267 different versions of the same shared library. For example,
268 there may be a problem if -lc picks up libc.so.6 but some other
269 shared library has a DT_NEEDED entry of libc.so.5. This is a
270 heuristic test, and it will only work if the name looks like
271 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
272 If we really want to issue warnings about mixing version numbers
273 of shared libraries, we need to find a better way. */
274
275 if (strchr (global_needed->name, '/') != NULL)
276 return;
277 suffix = strstr (global_needed->name, ".so.");
278 if (suffix == NULL)
279 return;
280 suffix += sizeof ".so." - 1;
281
282 soname = bfd_elf_get_dt_soname (s->the_bfd);
283 if (soname == NULL)
284 soname = lbasename (s->filename);
285
286 if (strncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
287 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
288 global_needed->name, global_needed->by, soname);
289 }
290
291 struct dt_needed
292 {
293 bfd *by;
294 const char *name;
295 };
296
297 /* This function is called for each possible name for a dynamic object
298 named by a DT_NEEDED entry. The FORCE parameter indicates whether
299 to skip the check for a conflicting version. */
300
301 static bfd_boolean
302 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
303 int force)
304 {
305 bfd *abfd;
306 const char *name = needed->name;
307 const char *soname;
308 int class;
309
310 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
311 if (abfd == NULL)
312 return FALSE;
313 if (! bfd_check_format (abfd, bfd_object))
314 {
315 bfd_close (abfd);
316 return FALSE;
317 }
318 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
319 {
320 bfd_close (abfd);
321 return FALSE;
322 }
323
324 /* For DT_NEEDED, they have to match. */
325 if (abfd->xvec != link_info.output_bfd->xvec)
326 {
327 bfd_close (abfd);
328 return FALSE;
329 }
330
331 /* Check whether this object would include any conflicting library
332 versions. If FORCE is set, then we skip this check; we use this
333 the second time around, if we couldn't find any compatible
334 instance of the shared library. */
335
336 if (! force)
337 {
338 struct bfd_link_needed_list *needed;
339
340 if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
341 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
342
343 if (needed != NULL)
344 {
345 global_vercheck_needed = needed;
346 global_vercheck_failed = FALSE;
347 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
348 if (global_vercheck_failed)
349 {
350 bfd_close (abfd);
351 /* Return FALSE to force the caller to move on to try
352 another file on the search path. */
353 return FALSE;
354 }
355
356 /* But wait! It gets much worse. On Linux, if a shared
357 library does not use libc at all, we are supposed to skip
358 it the first time around in case we encounter a shared
359 library later on with the same name which does use the
360 version of libc that we want. This is much too horrible
361 to use on any system other than Linux. */
362
363 EOF
364 case ${target} in
365 *-*-linux-* | *-*-k*bsd*-*)
366 fragment <<EOF
367 {
368 struct bfd_link_needed_list *l;
369
370 for (l = needed; l != NULL; l = l->next)
371 if (CONST_STRNEQ (l->name, "libc.so"))
372 break;
373 if (l == NULL)
374 {
375 bfd_close (abfd);
376 return FALSE;
377 }
378 }
379
380 EOF
381 ;;
382 esac
383 fragment <<EOF
384 }
385 }
386
387 /* We've found a dynamic object matching the DT_NEEDED entry. */
388
389 /* We have already checked that there is no other input file of the
390 same name. We must now check again that we are not including the
391 same file twice. We need to do this because on many systems
392 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
393 reference libc.so.1. If we have already included libc.so, we
394 don't want to include libc.so.1 if they are the same file, and we
395 can only check that using stat. */
396
397 if (bfd_stat (abfd, &global_stat) != 0)
398 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
399
400 /* First strip off everything before the last '/'. */
401 soname = lbasename (abfd->filename);
402
403 if (trace_file_tries)
404 info_msg (_("found %s at %s\n"), soname, name);
405
406 global_found = NULL;
407 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
408 if (global_found != NULL)
409 {
410 /* Return TRUE to indicate that we found the file, even though
411 we aren't going to do anything with it. */
412 return TRUE;
413 }
414
415 /* Specify the soname to use. */
416 bfd_elf_set_dt_needed_name (abfd, soname);
417
418 /* Tell the ELF linker that we don't want the output file to have a
419 DT_NEEDED entry for this file, unless it is used to resolve
420 references in a regular object. */
421 class = DYN_DT_NEEDED;
422
423 /* Tell the ELF linker that we don't want the output file to have a
424 DT_NEEDED entry for this file at all if the entry is from a file
425 with DYN_NO_ADD_NEEDED. */
426 if (needed->by != NULL
427 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
428 class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
429
430 bfd_elf_set_dyn_lib_class (abfd, class);
431
432 /* Add this file into the symbol table. */
433 if (! bfd_link_add_symbols (abfd, &link_info))
434 einfo ("%F%B: could not read symbols: %E\n", abfd);
435
436 return TRUE;
437 }
438
439
440 /* Search for a needed file in a path. */
441
442 static bfd_boolean
443 gld${EMULATION_NAME}_search_needed (const char *path,
444 struct dt_needed *n, int force)
445 {
446 const char *s;
447 const char *name = n->name;
448 size_t len;
449 struct dt_needed needed;
450
451 if (name[0] == '/')
452 return gld${EMULATION_NAME}_try_needed (n, force);
453
454 if (path == NULL || *path == '\0')
455 return FALSE;
456
457 needed.by = n->by;
458 needed.name = n->name;
459
460 len = strlen (name);
461 while (1)
462 {
463 char *filename, *sset;
464
465 s = strchr (path, config.rpath_separator);
466 if (s == NULL)
467 s = path + strlen (path);
468
469 filename = (char *) xmalloc (s - path + len + 2);
470 if (s == path)
471 sset = filename;
472 else
473 {
474 memcpy (filename, path, s - path);
475 filename[s - path] = '/';
476 sset = filename + (s - path) + 1;
477 }
478 strcpy (sset, name);
479
480 needed.name = filename;
481 if (gld${EMULATION_NAME}_try_needed (&needed, force))
482 return TRUE;
483
484 free (filename);
485
486 if (*s == '\0')
487 break;
488 path = s + 1;
489 }
490
491 return FALSE;
492 }
493
494 EOF
495 if [ "x${USE_LIBPATH}" = xyes ] ; then
496 fragment <<EOF
497
498 /* Add the sysroot to every entry in a path separated by
499 config.rpath_separator. */
500
501 static char *
502 gld${EMULATION_NAME}_add_sysroot (const char *path)
503 {
504 int len, colons, i;
505 char *ret, *p;
506
507 len = strlen (path);
508 colons = 0;
509 i = 0;
510 while (path[i])
511 if (path[i++] == config.rpath_separator)
512 colons++;
513
514 if (path[i])
515 colons++;
516
517 len = len + (colons + 1) * strlen (ld_sysroot);
518 ret = xmalloc (len + 1);
519 strcpy (ret, ld_sysroot);
520 p = ret + strlen (ret);
521 i = 0;
522 while (path[i])
523 if (path[i] == config.rpath_separator)
524 {
525 *p++ = path[i++];
526 strcpy (p, ld_sysroot);
527 p = p + strlen (p);
528 }
529 else
530 *p++ = path[i++];
531
532 *p = 0;
533 return ret;
534 }
535
536 EOF
537 case ${target} in
538 *-*-freebsd* | *-*-dragonfly*)
539 fragment <<EOF
540 /* Read the system search path the FreeBSD way rather than the Linux way. */
541 #ifdef HAVE_ELF_HINTS_H
542 #include <elf-hints.h>
543 #else
544 #include "elf-hints-local.h"
545 #endif
546
547 static bfd_boolean
548 gld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force)
549 {
550 static bfd_boolean initialized;
551 static char *ld_elf_hints;
552 struct dt_needed needed;
553
554 if (!initialized)
555 {
556 FILE *f;
557 char *tmppath;
558
559 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
560 f = fopen (tmppath, FOPEN_RB);
561 free (tmppath);
562 if (f != NULL)
563 {
564 struct elfhints_hdr hdr;
565
566 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
567 && hdr.magic == ELFHINTS_MAGIC
568 && hdr.version == 1)
569 {
570 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
571 {
572 char *b;
573
574 b = xmalloc (hdr.dirlistlen + 1);
575 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
576 hdr.dirlistlen + 1)
577 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
578
579 free (b);
580 }
581 }
582 fclose (f);
583 }
584
585 initialized = TRUE;
586 }
587
588 if (ld_elf_hints == NULL)
589 return FALSE;
590
591 needed.by = NULL;
592 needed.name = name;
593 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,
594 force);
595 }
596 EOF
597 # FreeBSD
598 ;;
599
600 *-*-linux-* | *-*-k*bsd*-*)
601 fragment <<EOF
602 /* For a native linker, check the file /etc/ld.so.conf for directories
603 in which we may find shared libraries. /etc/ld.so.conf is really
604 only meaningful on Linux. */
605
606 struct gld${EMULATION_NAME}_ld_so_conf
607 {
608 char *path;
609 size_t len, alloc;
610 };
611
612 static bfd_boolean
613 gld${EMULATION_NAME}_parse_ld_so_conf
614 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
615
616 static void
617 gld${EMULATION_NAME}_parse_ld_so_conf_include
618 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
619 const char *pattern)
620 {
621 char *newp = NULL;
622 #ifdef HAVE_GLOB
623 glob_t gl;
624 #endif
625
626 if (pattern[0] != '/')
627 {
628 char *p = strrchr (filename, '/');
629 size_t patlen = strlen (pattern) + 1;
630
631 newp = xmalloc (p - filename + 1 + patlen);
632 memcpy (newp, filename, p - filename + 1);
633 memcpy (newp + (p - filename + 1), pattern, patlen);
634 pattern = newp;
635 }
636
637 #ifdef HAVE_GLOB
638 if (glob (pattern, 0, NULL, &gl) == 0)
639 {
640 size_t i;
641
642 for (i = 0; i < gl.gl_pathc; ++i)
643 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
644 globfree (&gl);
645 }
646 #else
647 /* If we do not have glob, treat the pattern as a literal filename. */
648 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
649 #endif
650
651 if (newp)
652 free (newp);
653 }
654
655 static bfd_boolean
656 gld${EMULATION_NAME}_parse_ld_so_conf
657 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
658 {
659 FILE *f = fopen (filename, FOPEN_RT);
660 char *line;
661 size_t linelen;
662
663 if (f == NULL)
664 return FALSE;
665
666 linelen = 256;
667 line = xmalloc (linelen);
668 do
669 {
670 char *p = line, *q;
671
672 /* Normally this would use getline(3), but we need to be portable. */
673 while ((q = fgets (p, linelen - (p - line), f)) != NULL
674 && strlen (q) == linelen - (p - line) - 1
675 && line[linelen - 2] != '\n')
676 {
677 line = xrealloc (line, 2 * linelen);
678 p = line + linelen - 1;
679 linelen += linelen;
680 }
681
682 if (q == NULL && p == line)
683 break;
684
685 p = strchr (line, '\n');
686 if (p)
687 *p = '\0';
688
689 /* Because the file format does not know any form of quoting we
690 can search forward for the next '#' character and if found
691 make it terminating the line. */
692 p = strchr (line, '#');
693 if (p)
694 *p = '\0';
695
696 /* Remove leading whitespace. NUL is no whitespace character. */
697 p = line;
698 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
699 ++p;
700
701 /* If the line is blank it is ignored. */
702 if (p[0] == '\0')
703 continue;
704
705 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
706 {
707 char *dir, c;
708 p += 8;
709 do
710 {
711 while (*p == ' ' || *p == '\t')
712 ++p;
713
714 if (*p == '\0')
715 break;
716
717 dir = p;
718
719 while (*p != ' ' && *p != '\t' && *p)
720 ++p;
721
722 c = *p;
723 *p++ = '\0';
724 if (dir[0] != '\0')
725 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
726 dir);
727 }
728 while (c != '\0');
729 }
730 else
731 {
732 char *dir = p;
733 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
734 && *p != '\r' && *p != '\v')
735 ++p;
736
737 while (p != dir && p[-1] == '/')
738 --p;
739 if (info->path == NULL)
740 {
741 info->alloc = p - dir + 1 + 256;
742 info->path = xmalloc (info->alloc);
743 info->len = 0;
744 }
745 else
746 {
747 if (info->len + 1 + (p - dir) >= info->alloc)
748 {
749 info->alloc += p - dir + 256;
750 info->path = xrealloc (info->path, info->alloc);
751 }
752 info->path[info->len++] = config.rpath_separator;
753 }
754 memcpy (info->path + info->len, dir, p - dir);
755 info->len += p - dir;
756 info->path[info->len] = '\0';
757 }
758 }
759 while (! feof (f));
760 free (line);
761 fclose (f);
762 return TRUE;
763 }
764
765 static bfd_boolean
766 gld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force)
767 {
768 static bfd_boolean initialized;
769 static char *ld_so_conf;
770 struct dt_needed needed;
771
772 if (! initialized)
773 {
774 char *tmppath;
775 struct gld${EMULATION_NAME}_ld_so_conf info;
776
777 info.path = NULL;
778 info.len = info.alloc = 0;
779 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
780 (const char *) NULL);
781 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
782 {
783 free (tmppath);
784 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
785 (const char *) NULL);
786 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
787 }
788 free (tmppath);
789
790 if (info.path)
791 {
792 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
793 free (info.path);
794 ld_so_conf = d;
795 }
796 initialized = TRUE;
797 }
798
799 if (ld_so_conf == NULL)
800 return FALSE;
801
802
803 needed.by = NULL;
804 needed.name = name;
805 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
806 }
807
808 EOF
809 # Linux
810 ;;
811 esac
812 fi
813 fragment <<EOF
814
815 /* See if an input file matches a DT_NEEDED entry by name. */
816
817 static void
818 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
819 {
820 const char *soname;
821
822 /* Stop looking if we've found a loaded lib. */
823 if (global_found != NULL
824 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
825 & DYN_AS_NEEDED) == 0)
826 return;
827
828 if (s->filename == NULL || s->the_bfd == NULL)
829 return;
830
831 /* Don't look for a second non-loaded as-needed lib. */
832 if (global_found != NULL
833 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
834 return;
835
836 if (strcmp (s->filename, global_needed->name) == 0)
837 {
838 global_found = s;
839 return;
840 }
841
842 if (s->search_dirs_flag)
843 {
844 const char *f = strrchr (s->filename, '/');
845 if (f != NULL
846 && strcmp (f + 1, global_needed->name) == 0)
847 {
848 global_found = s;
849 return;
850 }
851 }
852
853 soname = bfd_elf_get_dt_soname (s->the_bfd);
854 if (soname != NULL
855 && strcmp (soname, global_needed->name) == 0)
856 {
857 global_found = s;
858 return;
859 }
860 }
861
862 EOF
863
864 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
865 fragment <<EOF
866
867 static bfd_size_type
868 gld${EMULATION_NAME}_id_note_section_size (bfd *abfd,
869 struct bfd_link_info *link_info)
870 {
871 const char *style = link_info->emit_note_gnu_build_id;
872 bfd_size_type size;
873
874 abfd = abfd;
875
876 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
877 size = (size + 3) & -(bfd_size_type) 4;
878
879 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
880 size += 128 / 8;
881 else if (!strcmp (style, "sha1"))
882 size += 160 / 8;
883 else if (!strncmp (style, "0x", 2))
884 {
885 /* ID is in string form (hex). Convert to bits. */
886 const char *id = style + 2;
887 do
888 {
889 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
890 {
891 ++size;
892 id += 2;
893 }
894 else if (*id == '-' || *id == ':')
895 ++id;
896 else
897 {
898 size = 0;
899 break;
900 }
901 } while (*id != '\0');
902 }
903 else
904 size = 0;
905
906 return size;
907 }
908
909 static unsigned char
910 read_hex (const char xdigit)
911 {
912 if (ISDIGIT (xdigit))
913 return xdigit - '0';
914 if (ISUPPER (xdigit))
915 return xdigit - 'A' + 0xa;
916 if (ISLOWER (xdigit))
917 return xdigit - 'a' + 0xa;
918 abort ();
919 return 0;
920 }
921
922 struct build_id_info
923 {
924 const char *style;
925 asection *sec;
926 };
927
928 static bfd_boolean
929 gld${EMULATION_NAME}_write_build_id_section (bfd *abfd)
930 {
931 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
932 struct build_id_info *info =
933 elf_tdata (abfd)->after_write_object_contents_info;
934 asection *asec;
935 Elf_Internal_Shdr *i_shdr;
936 unsigned char *contents, *id_bits;
937 bfd_size_type size;
938 Elf_External_Note *e_note;
939
940 asec = info->sec;
941 if (bfd_is_abs_section (asec->output_section))
942 {
943 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
944 " --build-id ignored.\n"));
945 return TRUE;
946 }
947 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
948
949 if (i_shdr->contents == NULL)
950 {
951 if (asec->contents == NULL)
952 asec->contents = xmalloc (asec->size);
953 contents = asec->contents;
954 }
955 else
956 contents = i_shdr->contents + asec->output_offset;
957
958 e_note = (void *) contents;
959 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
960 size = (size + 3) & -(bfd_size_type) 4;
961 id_bits = contents + size;
962 size = asec->size - size;
963
964 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
965 bfd_h_put_32 (abfd, size, &e_note->descsz);
966 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
967 memcpy (e_note->name, "GNU", sizeof "GNU");
968
969 if (!strcmp (info->style, "md5"))
970 {
971 struct md5_ctx ctx;
972 md5_init_ctx (&ctx);
973 if (bed->s->checksum_contents (abfd,
974 (void (*) (const void *, size_t, void *))
975 &md5_process_bytes,
976 &ctx))
977 md5_finish_ctx (&ctx, id_bits);
978 else
979 return FALSE;
980 }
981 else if (!strcmp (info->style, "sha1"))
982 {
983 struct sha1_ctx ctx;
984 sha1_init_ctx (&ctx);
985 if (bed->s->checksum_contents (abfd,
986 (void (*) (const void *, size_t, void *))
987 &sha1_process_bytes,
988 &ctx))
989 sha1_finish_ctx (&ctx, id_bits);
990 else
991 return FALSE;
992 }
993 else if (!strcmp (info->style, "uuid"))
994 {
995 int n;
996 int fd = open ("/dev/urandom", O_RDONLY);
997 if (fd < 0)
998 return FALSE;
999 n = read (fd, id_bits, size);
1000 close (fd);
1001 if (n < (int) size)
1002 return FALSE;
1003 }
1004 else if (!strncmp (info->style, "0x", 2))
1005 {
1006 /* ID is in string form (hex). Convert to bits. */
1007 const char *id = info->style + 2;
1008 size_t n = 0;
1009 do
1010 {
1011 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1012 {
1013 id_bits[n] = read_hex (*id++) << 4;
1014 id_bits[n++] |= read_hex (*id++);
1015 }
1016 else if (*id == '-' || *id == ':')
1017 ++id;
1018 else
1019 abort (); /* Should have been validated earlier. */
1020 } while (*id != '\0');
1021 }
1022 else
1023 abort (); /* Should have been validated earlier. */
1024
1025 size = asec->size;
1026 return (bfd_seek (abfd,
1027 i_shdr->sh_offset + asec->output_offset, SEEK_SET) == 0
1028 && bfd_bwrite (contents, size, abfd) == size);
1029 }
1030
1031
1032 /* This is called after all the input files have been opened. */
1033
1034 static void
1035 gld${EMULATION_NAME}_after_open (void)
1036 {
1037 struct bfd_link_needed_list *needed, *l;
1038 struct elf_link_hash_table *htab;
1039
1040 htab = elf_hash_table (&link_info);
1041 if (!is_elf_hash_table (htab))
1042 return;
1043
1044 if (link_info.emit_note_gnu_build_id)
1045 {
1046 bfd *abfd;
1047 asection *s;
1048 bfd_size_type size;
1049
1050 abfd = link_info.input_bfds;
1051
1052 size = gld${EMULATION_NAME}_id_note_section_size (abfd, &link_info);
1053 if (size == 0)
1054 {
1055 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1056 free (link_info.emit_note_gnu_build_id);
1057 link_info.emit_note_gnu_build_id = NULL;
1058 }
1059 else
1060 {
1061 s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id",
1062 SEC_ALLOC | SEC_LOAD
1063 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1064 | SEC_READONLY | SEC_DATA);
1065 if (s != NULL && bfd_set_section_alignment (abfd, s, 2))
1066 {
1067 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1068 struct build_id_info *b = xmalloc (sizeof *b);
1069 b->style = link_info.emit_note_gnu_build_id;
1070 b->sec = s;
1071 elf_section_type (s) = SHT_NOTE;
1072 s->size = size;
1073 t->after_write_object_contents
1074 = &gld${EMULATION_NAME}_write_build_id_section;
1075 t->after_write_object_contents_info = b;
1076 }
1077 else
1078 {
1079 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1080 " --build-id ignored.\n");
1081 free (link_info.emit_note_gnu_build_id);
1082 link_info.emit_note_gnu_build_id = NULL;
1083 }
1084 }
1085 }
1086
1087 if (link_info.relocatable)
1088 return;
1089
1090 if (link_info.eh_frame_hdr
1091 && !link_info.traditional_format)
1092 {
1093 bfd *abfd;
1094 asection *s;
1095
1096 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1097 {
1098 s = bfd_get_section_by_name (abfd, ".eh_frame");
1099 if (s && s->size > 8 && !bfd_is_abs_section (s->output_section))
1100 break;
1101 }
1102 if (abfd)
1103 {
1104 const struct elf_backend_data *bed;
1105
1106 bed = get_elf_backend_data (abfd);
1107 s = bfd_make_section_with_flags (abfd, ".eh_frame_hdr",
1108 bed->dynamic_sec_flags
1109 | SEC_READONLY);
1110 if (s != NULL
1111 && bfd_set_section_alignment (abfd, s, 2))
1112 htab->eh_info.hdr_sec = s;
1113 else
1114 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1115 " --eh-frame-hdr ignored.\n");
1116 }
1117 }
1118
1119 /* Get the list of files which appear in DT_NEEDED entries in
1120 dynamic objects included in the link (often there will be none).
1121 For each such file, we want to track down the corresponding
1122 library, and include the symbol table in the link. This is what
1123 the runtime dynamic linker will do. Tracking the files down here
1124 permits one dynamic object to include another without requiring
1125 special action by the person doing the link. Note that the
1126 needed list can actually grow while we are stepping through this
1127 loop. */
1128 if (!link_info.executable)
1129 return;
1130 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1131 for (l = needed; l != NULL; l = l->next)
1132 {
1133 struct bfd_link_needed_list *ll;
1134 struct dt_needed n, nn;
1135 int force;
1136
1137 /* If the lib that needs this one was --as-needed and wasn't
1138 found to be needed, then this lib isn't needed either. */
1139 if (l->by != NULL
1140 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1141 continue;
1142
1143 /* If we've already seen this file, skip it. */
1144 for (ll = needed; ll != l; ll = ll->next)
1145 if ((ll->by == NULL
1146 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1147 && strcmp (ll->name, l->name) == 0)
1148 break;
1149 if (ll != l)
1150 continue;
1151
1152 /* See if this file was included in the link explicitly. */
1153 global_needed = l;
1154 global_found = NULL;
1155 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1156 if (global_found != NULL
1157 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1158 & DYN_AS_NEEDED) == 0)
1159 continue;
1160
1161 n.by = l->by;
1162 n.name = l->name;
1163 nn.by = l->by;
1164 if (trace_file_tries)
1165 info_msg (_("%s needed by %B\n"), l->name, l->by);
1166
1167 /* As-needed libs specified on the command line (or linker script)
1168 take priority over libs found in search dirs. */
1169 if (global_found != NULL)
1170 {
1171 nn.name = global_found->filename;
1172 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1173 continue;
1174 }
1175
1176 /* We need to find this file and include the symbol table. We
1177 want to search for the file in the same way that the dynamic
1178 linker will search. That means that we want to use
1179 rpath_link, rpath, then the environment variable
1180 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1181 entries (native only), then the linker script LIB_SEARCH_DIRS.
1182 We do not search using the -L arguments.
1183
1184 We search twice. The first time, we skip objects which may
1185 introduce version mismatches. The second time, we force
1186 their use. See gld${EMULATION_NAME}_vercheck comment. */
1187 for (force = 0; force < 2; force++)
1188 {
1189 size_t len;
1190 search_dirs_type *search;
1191 EOF
1192 if [ "x${NATIVE}" = xyes ] ; then
1193 fragment <<EOF
1194 const char *lib_path;
1195 EOF
1196 fi
1197 if [ "x${USE_LIBPATH}" = xyes ] ; then
1198 fragment <<EOF
1199 struct bfd_link_needed_list *rp;
1200 int found;
1201 EOF
1202 fi
1203 fragment <<EOF
1204
1205 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1206 &n, force))
1207 break;
1208 EOF
1209 if [ "x${USE_LIBPATH}" = xyes ] ; then
1210 fragment <<EOF
1211 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1212 &n, force))
1213 break;
1214 EOF
1215 fi
1216 if [ "x${NATIVE}" = xyes ] ; then
1217 fragment <<EOF
1218 if (command_line.rpath_link == NULL
1219 && command_line.rpath == NULL)
1220 {
1221 lib_path = (const char *) getenv ("LD_RUN_PATH");
1222 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1223 force))
1224 break;
1225 }
1226 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1227 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1228 break;
1229 EOF
1230 fi
1231 if [ "x${USE_LIBPATH}" = xyes ] ; then
1232 fragment <<EOF
1233 found = 0;
1234 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1235 for (; !found && rp != NULL; rp = rp->next)
1236 {
1237 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1238 found = (rp->by == l->by
1239 && gld${EMULATION_NAME}_search_needed (tmpname,
1240 &n,
1241 force));
1242 free (tmpname);
1243 }
1244 if (found)
1245 break;
1246
1247 EOF
1248 fi
1249 if [ "x${USE_LIBPATH}" = xyes ] ; then
1250 case ${target} in
1251 *-*-freebsd* | *-*-dragonfly*)
1252 fragment <<EOF
1253 if (gld${EMULATION_NAME}_check_ld_elf_hints (l->name, force))
1254 break;
1255 EOF
1256 # FreeBSD
1257 ;;
1258
1259 *-*-linux-* | *-*-k*bsd*-*)
1260 # Linux
1261 fragment <<EOF
1262 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
1263 break;
1264
1265 EOF
1266 ;;
1267 esac
1268 fi
1269 fragment <<EOF
1270 len = strlen (l->name);
1271 for (search = search_head; search != NULL; search = search->next)
1272 {
1273 char *filename;
1274
1275 if (search->cmdline)
1276 continue;
1277 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1278 sprintf (filename, "%s/%s", search->name, l->name);
1279 nn.name = filename;
1280 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1281 break;
1282 free (filename);
1283 }
1284 if (search != NULL)
1285 break;
1286 EOF
1287 fragment <<EOF
1288 }
1289
1290 if (force < 2)
1291 continue;
1292
1293 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1294 l->name, l->by);
1295 }
1296 }
1297
1298 EOF
1299 fi
1300
1301 fragment <<EOF
1302
1303 /* Look through an expression for an assignment statement. */
1304
1305 static void
1306 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1307 {
1308 bfd_boolean provide = FALSE;
1309
1310 switch (exp->type.node_class)
1311 {
1312 case etree_provide:
1313 provide = TRUE;
1314 /* Fall thru */
1315 case etree_assign:
1316 /* We call record_link_assignment even if the symbol is defined.
1317 This is because if it is defined by a dynamic object, we
1318 actually want to use the value defined by the linker script,
1319 not the value from the dynamic object (because we are setting
1320 symbols like etext). If the symbol is defined by a regular
1321 object, then, as it happens, calling record_link_assignment
1322 will do no harm. */
1323 if (strcmp (exp->assign.dst, ".") != 0)
1324 {
1325 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1326 &link_info,
1327 exp->assign.dst, provide,
1328 exp->assign.hidden))
1329 einfo ("%P%F: failed to record assignment to %s: %E\n",
1330 exp->assign.dst);
1331 }
1332 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1333 break;
1334
1335 case etree_binary:
1336 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1337 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1338 break;
1339
1340 case etree_trinary:
1341 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1342 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1343 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1344 break;
1345
1346 case etree_unary:
1347 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1348 break;
1349
1350 default:
1351 break;
1352 }
1353 }
1354
1355
1356 /* This is called by the before_allocation routine via
1357 lang_for_each_statement. It locates any assignment statements, and
1358 tells the ELF backend about them, in case they are assignments to
1359 symbols which are referred to by dynamic objects. */
1360
1361 static void
1362 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1363 {
1364 if (s->header.type == lang_assignment_statement_enum)
1365 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1366 }
1367
1368 EOF
1369
1370 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1371 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1372 ELF_INTERPRETER_SET_DEFAULT="
1373 if (sinterp != NULL)
1374 {
1375 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1376 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1377 }
1378
1379 "
1380 else
1381 ELF_INTERPRETER_SET_DEFAULT=
1382 fi
1383 fragment <<EOF
1384
1385 /* This is called after the sections have been attached to output
1386 sections, but before any sizes or addresses have been set. */
1387
1388 static void
1389 gld${EMULATION_NAME}_before_allocation (void)
1390 {
1391 const char *rpath;
1392 asection *sinterp;
1393
1394 if (link_info.hash->type == bfd_link_elf_hash_table)
1395 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1396
1397 /* If we are going to make any variable assignments, we need to let
1398 the ELF backend know about them in case the variables are
1399 referred to by dynamic objects. */
1400 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1401
1402 /* Let the ELF backend work out the sizes of any sections required
1403 by dynamic linking. */
1404 rpath = command_line.rpath;
1405 if (rpath == NULL)
1406 rpath = (const char *) getenv ("LD_RUN_PATH");
1407 if (! (bfd_elf_size_dynamic_sections
1408 (link_info.output_bfd, command_line.soname, rpath,
1409 command_line.filter_shlib,
1410 (const char * const *) command_line.auxiliary_filters,
1411 &link_info, &sinterp, lang_elf_version_info)))
1412 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1413
1414 ${ELF_INTERPRETER_SET_DEFAULT}
1415 /* Let the user override the dynamic linker we are using. */
1416 if (command_line.interpreter != NULL
1417 && sinterp != NULL)
1418 {
1419 sinterp->contents = (bfd_byte *) command_line.interpreter;
1420 sinterp->size = strlen (command_line.interpreter) + 1;
1421 }
1422
1423 /* Look for any sections named .gnu.warning. As a GNU extensions,
1424 we treat such sections as containing warning messages. We print
1425 out the warning message, and then zero out the section size so
1426 that it does not get copied into the output file. */
1427
1428 {
1429 LANG_FOR_EACH_INPUT_STATEMENT (is)
1430 {
1431 asection *s;
1432 bfd_size_type sz;
1433 char *msg;
1434 bfd_boolean ret;
1435
1436 if (is->just_syms_flag)
1437 continue;
1438
1439 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1440 if (s == NULL)
1441 continue;
1442
1443 sz = s->size;
1444 msg = xmalloc ((size_t) (sz + 1));
1445 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1446 (file_ptr) 0, sz))
1447 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1448 is->the_bfd);
1449 msg[sz] = '\0';
1450 ret = link_info.callbacks->warning (&link_info, msg,
1451 (const char *) NULL,
1452 is->the_bfd, (asection *) NULL,
1453 (bfd_vma) 0);
1454 ASSERT (ret);
1455 free (msg);
1456
1457 /* Clobber the section size, so that we don't waste space
1458 copying the warning into the output file. If we've already
1459 sized the output section, adjust its size. The adjustment
1460 is on rawsize because targets that size sections early will
1461 have called lang_reset_memory_regions after sizing. */
1462 if (s->output_section != NULL
1463 && s->output_section->rawsize >= s->size)
1464 s->output_section->rawsize -= s->size;
1465
1466 s->size = 0;
1467
1468 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1469 warning section don't get copied to the output. */
1470 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1471 }
1472 }
1473
1474 before_allocation_default ();
1475
1476 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1477 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1478 }
1479
1480 EOF
1481 fi
1482
1483 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1484 fragment <<EOF
1485
1486 /* Try to open a dynamic archive. This is where we know that ELF
1487 dynamic libraries have an extension of .so (or .sl on oddball systems
1488 like hpux). */
1489
1490 static bfd_boolean
1491 gld${EMULATION_NAME}_open_dynamic_archive
1492 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1493 {
1494 const char *filename;
1495 char *string;
1496
1497 if (! entry->is_archive)
1498 return FALSE;
1499
1500 filename = entry->filename;
1501
1502 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1503 is defined, but it does not seem worth the headache to optimize
1504 away those two bytes of space. */
1505 string = (char *) xmalloc (strlen (search->name)
1506 + strlen (filename)
1507 + strlen (arch)
1508 #ifdef EXTRA_SHLIB_EXTENSION
1509 + strlen (EXTRA_SHLIB_EXTENSION)
1510 #endif
1511 + sizeof "/lib.so");
1512
1513 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1514
1515 #ifdef EXTRA_SHLIB_EXTENSION
1516 /* Try the .so extension first. If that fails build a new filename
1517 using EXTRA_SHLIB_EXTENSION. */
1518 if (! ldfile_try_open_bfd (string, entry))
1519 {
1520 sprintf (string, "%s/lib%s%s%s", search->name,
1521 filename, arch, EXTRA_SHLIB_EXTENSION);
1522 #endif
1523
1524 if (! ldfile_try_open_bfd (string, entry))
1525 {
1526 free (string);
1527 return FALSE;
1528 }
1529 #ifdef EXTRA_SHLIB_EXTENSION
1530 }
1531 #endif
1532
1533 entry->filename = string;
1534
1535 /* We have found a dynamic object to include in the link. The ELF
1536 backend linker will create a DT_NEEDED entry in the .dynamic
1537 section naming this file. If this file includes a DT_SONAME
1538 entry, it will be used. Otherwise, the ELF linker will just use
1539 the name of the file. For an archive found by searching, like
1540 this one, the DT_NEEDED entry should consist of just the name of
1541 the file, without the path information used to find it. Note
1542 that we only need to do this if we have a dynamic object; an
1543 archive will never be referenced by a DT_NEEDED entry.
1544
1545 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1546 very pretty. I haven't been able to think of anything that is
1547 pretty, though. */
1548 if (bfd_check_format (entry->the_bfd, bfd_object)
1549 && (entry->the_bfd->flags & DYNAMIC) != 0)
1550 {
1551 ASSERT (entry->is_archive && entry->search_dirs_flag);
1552
1553 /* Rather than duplicating the logic above. Just use the
1554 filename we recorded earlier. */
1555
1556 filename = lbasename (entry->filename);
1557 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1558 }
1559
1560 return TRUE;
1561 }
1562
1563 EOF
1564 fi
1565
1566 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1567 fragment <<EOF
1568
1569 /* A variant of lang_output_section_find used by place_orphan. */
1570
1571 static lang_output_section_statement_type *
1572 output_rel_find (asection *sec, int isdyn)
1573 {
1574 lang_output_section_statement_type *lookup;
1575 lang_output_section_statement_type *last = NULL;
1576 lang_output_section_statement_type *last_alloc = NULL;
1577 lang_output_section_statement_type *last_ro_alloc = NULL;
1578 lang_output_section_statement_type *last_rel = NULL;
1579 lang_output_section_statement_type *last_rel_alloc = NULL;
1580 int rela = sec->name[4] == 'a';
1581
1582 for (lookup = &lang_output_section_statement.head->output_section_statement;
1583 lookup != NULL;
1584 lookup = lookup->next)
1585 {
1586 if (lookup->constraint >= 0
1587 && CONST_STRNEQ (lookup->name, ".rel"))
1588 {
1589 int lookrela = lookup->name[4] == 'a';
1590
1591 /* .rel.dyn must come before all other reloc sections, to suit
1592 GNU ld.so. */
1593 if (isdyn)
1594 break;
1595
1596 /* Don't place after .rel.plt as doing so results in wrong
1597 dynamic tags. */
1598 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1599 break;
1600
1601 if (rela == lookrela || last_rel == NULL)
1602 last_rel = lookup;
1603 if ((rela == lookrela || last_rel_alloc == NULL)
1604 && lookup->bfd_section != NULL
1605 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1606 last_rel_alloc = lookup;
1607 }
1608
1609 last = lookup;
1610 if (lookup->bfd_section != NULL
1611 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1612 {
1613 last_alloc = lookup;
1614 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1615 last_ro_alloc = lookup;
1616 }
1617 }
1618
1619 if (last_rel_alloc)
1620 return last_rel_alloc;
1621
1622 if (last_rel)
1623 return last_rel;
1624
1625 if (last_ro_alloc)
1626 return last_ro_alloc;
1627
1628 if (last_alloc)
1629 return last_alloc;
1630
1631 return last;
1632 }
1633
1634 /* Place an orphan section. We use this to put random SHF_ALLOC
1635 sections in the right segment. */
1636
1637 static bfd_boolean
1638 gld${EMULATION_NAME}_place_orphan (asection *s)
1639 {
1640 static struct orphan_save hold[] =
1641 {
1642 { ".text",
1643 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1644 0, 0, 0, 0 },
1645 { ".rodata",
1646 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1647 0, 0, 0, 0 },
1648 { ".data",
1649 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1650 0, 0, 0, 0 },
1651 { ".bss",
1652 SEC_ALLOC,
1653 0, 0, 0, 0 },
1654 { 0,
1655 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1656 0, 0, 0, 0 },
1657 { ".interp",
1658 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1659 0, 0, 0, 0 },
1660 { ".sdata",
1661 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1662 0, 0, 0, 0 }
1663 };
1664 enum orphan_save_index
1665 {
1666 orphan_text = 0,
1667 orphan_rodata,
1668 orphan_data,
1669 orphan_bss,
1670 orphan_rel,
1671 orphan_interp,
1672 orphan_sdata
1673 };
1674 static int orphan_init_done = 0;
1675 struct orphan_save *place;
1676 const char *secname;
1677 lang_output_section_statement_type *after;
1678 lang_output_section_statement_type *os;
1679 int isdyn = 0;
1680 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1681 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1682
1683 secname = bfd_get_section_name (s->owner, s);
1684
1685 if (! link_info.relocatable
1686 && link_info.combreloc
1687 && (s->flags & SEC_ALLOC))
1688 {
1689 if (iself)
1690 switch (sh_type)
1691 {
1692 case SHT_RELA:
1693 secname = ".rela.dyn";
1694 isdyn = 1;
1695 break;
1696 case SHT_REL:
1697 secname = ".rel.dyn";
1698 isdyn = 1;
1699 break;
1700 default:
1701 break;
1702 }
1703 else if (CONST_STRNEQ (secname, ".rel"))
1704 {
1705 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1706 isdyn = 1;
1707 }
1708 }
1709
1710 if (isdyn || (!config.unique_orphan_sections && !unique_section_p (s)))
1711 {
1712 /* Look through the script to see where to place this section. */
1713 os = lang_output_section_find (secname);
1714
1715 if (os != NULL
1716 && (os->bfd_section == NULL
1717 || os->bfd_section->flags == 0
1718 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1719 os->bfd_section,
1720 s->owner, s)
1721 && ((s->flags ^ os->bfd_section->flags)
1722 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1723 {
1724 /* We already have an output section statement with this
1725 name, and its bfd section, if any, has compatible flags.
1726 If the section already exists but does not have any flags
1727 set, then it has been created by the linker, probably as a
1728 result of a --section-start command line switch. */
1729 lang_add_section (&os->children, s, os);
1730 return TRUE;
1731 }
1732 }
1733
1734 if (!orphan_init_done)
1735 {
1736 struct orphan_save *ho;
1737 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1738 if (ho->name != NULL)
1739 {
1740 ho->os = lang_output_section_find (ho->name);
1741 if (ho->os != NULL && ho->os->flags == 0)
1742 ho->os->flags = ho->flags;
1743 }
1744 orphan_init_done = 1;
1745 }
1746
1747 /* If this is a final link, then always put .gnu.warning.SYMBOL
1748 sections into the .text section to get them out of the way. */
1749 if (link_info.executable
1750 && ! link_info.relocatable
1751 && CONST_STRNEQ (secname, ".gnu.warning.")
1752 && hold[orphan_text].os != NULL)
1753 {
1754 lang_add_section (&hold[orphan_text].os->children, s,
1755 hold[orphan_text].os);
1756 return TRUE;
1757 }
1758
1759 /* Decide which segment the section should go in based on the
1760 section name and section flags. We put loadable .note sections
1761 right after the .interp section, so that the PT_NOTE segment is
1762 stored right after the program headers where the OS can read it
1763 in the first page. */
1764
1765 place = NULL;
1766 if ((s->flags & SEC_ALLOC) == 0)
1767 ;
1768 else if ((s->flags & SEC_LOAD) != 0
1769 && ((iself && sh_type == SHT_NOTE)
1770 || (!iself && CONST_STRNEQ (secname, ".note"))))
1771 place = &hold[orphan_interp];
1772 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
1773 place = &hold[orphan_bss];
1774 else if ((s->flags & SEC_SMALL_DATA) != 0)
1775 place = &hold[orphan_sdata];
1776 else if ((s->flags & SEC_READONLY) == 0)
1777 place = &hold[orphan_data];
1778 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1779 || (!iself && CONST_STRNEQ (secname, ".rel")))
1780 && (s->flags & SEC_LOAD) != 0)
1781 place = &hold[orphan_rel];
1782 else if ((s->flags & SEC_CODE) == 0)
1783 place = &hold[orphan_rodata];
1784 else
1785 place = &hold[orphan_text];
1786
1787 after = NULL;
1788 if (place != NULL)
1789 {
1790 if (place->os == NULL)
1791 {
1792 if (place->name != NULL)
1793 place->os = lang_output_section_find (place->name);
1794 else
1795 place->os = output_rel_find (s, isdyn);
1796 }
1797 after = place->os;
1798 if (after == NULL)
1799 after = lang_output_section_find_by_flags
1800 (s, &place->os, _bfd_elf_match_sections_by_type);
1801 if (after == NULL)
1802 /* *ABS* is always the first output section statement. */
1803 after = &lang_output_section_statement.head->output_section_statement;
1804 }
1805
1806 /* Choose a unique name for the section. This will be needed if the
1807 same section name appears in the input file with different
1808 loadable or allocatable characteristics. */
1809 if (bfd_get_section_by_name (link_info.output_bfd, secname) != NULL)
1810 {
1811 static int count = 1;
1812 secname = bfd_get_unique_section_name (link_info.output_bfd,
1813 secname, &count);
1814 if (secname == NULL)
1815 einfo ("%F%P: place_orphan failed: %E\n");
1816 }
1817
1818 lang_insert_orphan (s, secname, after, place, NULL, NULL);
1819
1820 return TRUE;
1821 }
1822 EOF
1823 fi
1824
1825 if test x"$LDEMUL_FINISH" != xgld"$EMULATION_NAME"_finish; then
1826 fragment <<EOF
1827
1828 static void
1829 gld${EMULATION_NAME}_finish (void)
1830 {
1831 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1832 &link_info);
1833
1834 gld${EMULATION_NAME}_map_segments (need_layout);
1835 finish_default ();
1836 }
1837 EOF
1838 fi
1839
1840 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1841 fragment <<EOF
1842
1843 static char *
1844 gld${EMULATION_NAME}_get_script (int *isfile)
1845 EOF
1846
1847 if test -n "$COMPILE_IN"
1848 then
1849 # Scripts compiled in.
1850
1851 # sed commands to quote an ld script as a C string.
1852 sc="-f stringify.sed"
1853
1854 fragment <<EOF
1855 {
1856 *isfile = 0;
1857
1858 if (link_info.relocatable && config.build_constructors)
1859 return
1860 EOF
1861 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1862 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1863 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1864 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1865 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1866 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1867 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1868 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1869 fi
1870 if test -n "$GENERATE_PIE_SCRIPT" ; then
1871 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1872 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
1873 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1874 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1875 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
1876 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1877 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
1878 fi
1879 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
1880 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
1881 fi
1882 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1883 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1884 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
1885 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1886 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1887 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
1888 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1889 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
1890 fi
1891 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1892 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1893 fi
1894 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1895 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
1896 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1897 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
1898 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
1899 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
1900 fi
1901 echo ' ; else return' >> e${EMULATION_NAME}.c
1902 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1903 echo '; }' >> e${EMULATION_NAME}.c
1904
1905 else
1906 # Scripts read from the filesystem.
1907
1908 fragment <<EOF
1909 {
1910 *isfile = 1;
1911
1912 if (link_info.relocatable && config.build_constructors)
1913 return "ldscripts/${EMULATION_NAME}.xu";
1914 else if (link_info.relocatable)
1915 return "ldscripts/${EMULATION_NAME}.xr";
1916 else if (!config.text_read_only)
1917 return "ldscripts/${EMULATION_NAME}.xbn";
1918 EOF
1919 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
1920 else
1921 fragment <<EOF
1922 else if (!config.magic_demand_paged)
1923 return "ldscripts/${EMULATION_NAME}.xn";
1924 EOF
1925 fi
1926 if test -n "$GENERATE_PIE_SCRIPT" ; then
1927 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1928 fragment <<EOF
1929 else if (link_info.pie && link_info.combreloc
1930 && link_info.relro && (link_info.flags & DF_BIND_NOW))
1931 return "ldscripts/${EMULATION_NAME}.xdw";
1932 else if (link_info.pie && link_info.combreloc)
1933 return "ldscripts/${EMULATION_NAME}.xdc";
1934 EOF
1935 fi
1936 fragment <<EOF
1937 else if (link_info.pie)
1938 return "ldscripts/${EMULATION_NAME}.xd";
1939 EOF
1940 fi
1941 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1942 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1943 fragment <<EOF
1944 else if (link_info.shared && link_info.combreloc
1945 && link_info.relro && (link_info.flags & DF_BIND_NOW))
1946 return "ldscripts/${EMULATION_NAME}.xsw";
1947 else if (link_info.shared && link_info.combreloc)
1948 return "ldscripts/${EMULATION_NAME}.xsc";
1949 EOF
1950 fi
1951 fragment <<EOF
1952 else if (link_info.shared)
1953 return "ldscripts/${EMULATION_NAME}.xs";
1954 EOF
1955 fi
1956 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1957 fragment <<EOF
1958 else if (link_info.combreloc && link_info.relro
1959 && (link_info.flags & DF_BIND_NOW))
1960 return "ldscripts/${EMULATION_NAME}.xw";
1961 else if (link_info.combreloc)
1962 return "ldscripts/${EMULATION_NAME}.xc";
1963 EOF
1964 fi
1965 fragment <<EOF
1966 else
1967 return "ldscripts/${EMULATION_NAME}.x";
1968 }
1969
1970 EOF
1971 fi
1972 fi
1973
1974 if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1975
1976 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
1977 fragment <<EOF
1978 $PARSE_AND_LIST_PROLOGUE
1979 EOF
1980 fi
1981
1982 fragment <<EOF
1983
1984 #define OPTION_DISABLE_NEW_DTAGS (400)
1985 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
1986 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
1987 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
1988 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
1989 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
1990 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
1991
1992 static void
1993 gld${EMULATION_NAME}_add_options
1994 (int ns, char **shortopts, int nl, struct option **longopts,
1995 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
1996 {
1997 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
1998 static const struct option xtra_long[] = {
1999 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2000 EOF
2001
2002 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2003 fragment <<EOF
2004 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2005 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2006 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2007 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2008 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2009 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2010 EOF
2011 fi
2012
2013 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2014 fragment <<EOF
2015 $PARSE_AND_LIST_LONGOPTS
2016 EOF
2017 fi
2018
2019 fragment <<EOF
2020 {NULL, no_argument, NULL, 0}
2021 };
2022
2023 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2024 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2025 *longopts = (struct option *)
2026 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2027 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2028 }
2029
2030 #define DEFAULT_BUILD_ID_STYLE "sha1"
2031
2032 static bfd_boolean
2033 gld${EMULATION_NAME}_handle_option (int optc)
2034 {
2035 switch (optc)
2036 {
2037 default:
2038 return FALSE;
2039
2040 case OPTION_BUILD_ID:
2041 if (link_info.emit_note_gnu_build_id != NULL)
2042 {
2043 free (link_info.emit_note_gnu_build_id);
2044 link_info.emit_note_gnu_build_id = NULL;
2045 }
2046 if (optarg == NULL)
2047 optarg = DEFAULT_BUILD_ID_STYLE;
2048 if (strcmp (optarg, "none"))
2049 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2050 break;
2051
2052 EOF
2053
2054 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2055 fragment <<EOF
2056 case OPTION_DISABLE_NEW_DTAGS:
2057 link_info.new_dtags = FALSE;
2058 break;
2059
2060 case OPTION_ENABLE_NEW_DTAGS:
2061 link_info.new_dtags = TRUE;
2062 break;
2063
2064 case OPTION_EH_FRAME_HDR:
2065 link_info.eh_frame_hdr = TRUE;
2066 break;
2067
2068 case OPTION_GROUP:
2069 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2070 /* Groups must be self-contained. */
2071 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2072 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2073 break;
2074
2075 case OPTION_EXCLUDE_LIBS:
2076 add_excluded_libs (optarg);
2077 break;
2078
2079 case OPTION_HASH_STYLE:
2080 link_info.emit_hash = FALSE;
2081 link_info.emit_gnu_hash = FALSE;
2082 if (strcmp (optarg, "sysv") == 0)
2083 link_info.emit_hash = TRUE;
2084 else if (strcmp (optarg, "gnu") == 0)
2085 link_info.emit_gnu_hash = TRUE;
2086 else if (strcmp (optarg, "both") == 0)
2087 {
2088 link_info.emit_hash = TRUE;
2089 link_info.emit_gnu_hash = TRUE;
2090 }
2091 else
2092 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2093 break;
2094
2095 case 'z':
2096 if (strcmp (optarg, "initfirst") == 0)
2097 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2098 else if (strcmp (optarg, "interpose") == 0)
2099 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2100 else if (strcmp (optarg, "loadfltr") == 0)
2101 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2102 else if (strcmp (optarg, "nodefaultlib") == 0)
2103 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2104 else if (strcmp (optarg, "nodelete") == 0)
2105 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2106 else if (strcmp (optarg, "nodlopen") == 0)
2107 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2108 else if (strcmp (optarg, "nodump") == 0)
2109 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2110 else if (strcmp (optarg, "now") == 0)
2111 {
2112 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2113 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2114 }
2115 else if (strcmp (optarg, "lazy") == 0)
2116 {
2117 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2118 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2119 }
2120 else if (strcmp (optarg, "origin") == 0)
2121 {
2122 link_info.flags |= (bfd_vma) DF_ORIGIN;
2123 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2124 }
2125 else if (strcmp (optarg, "defs") == 0)
2126 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2127 else if (strcmp (optarg, "muldefs") == 0)
2128 link_info.allow_multiple_definition = TRUE;
2129 else if (strcmp (optarg, "combreloc") == 0)
2130 link_info.combreloc = TRUE;
2131 else if (strcmp (optarg, "nocombreloc") == 0)
2132 link_info.combreloc = FALSE;
2133 else if (strcmp (optarg, "nocopyreloc") == 0)
2134 link_info.nocopyreloc = TRUE;
2135 else if (strcmp (optarg, "execstack") == 0)
2136 {
2137 link_info.execstack = TRUE;
2138 link_info.noexecstack = FALSE;
2139 }
2140 else if (strcmp (optarg, "noexecstack") == 0)
2141 {
2142 link_info.noexecstack = TRUE;
2143 link_info.execstack = FALSE;
2144 }
2145 EOF
2146
2147 if test -n "$COMMONPAGESIZE"; then
2148 fragment <<EOF
2149 else if (strcmp (optarg, "relro") == 0)
2150 link_info.relro = TRUE;
2151 else if (strcmp (optarg, "norelro") == 0)
2152 link_info.relro = FALSE;
2153 EOF
2154 fi
2155
2156 fragment <<EOF
2157 else if (CONST_STRNEQ (optarg, "max-page-size="))
2158 {
2159 char *end;
2160
2161 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2162 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2163 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2164 optarg + 14);
2165 ASSERT (default_target != NULL);
2166 bfd_emul_set_maxpagesize (default_target, config.maxpagesize);
2167 }
2168 else if (CONST_STRNEQ (optarg, "common-page-size="))
2169 {
2170 char *end;
2171 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2172 if (*end
2173 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2174 einfo (_("%P%F: invalid common page size \`%s'\n"),
2175 optarg + 17);
2176 ASSERT (default_target != NULL);
2177 bfd_emul_set_commonpagesize (default_target,
2178 config.commonpagesize);
2179 }
2180 /* What about the other Solaris -z options? FIXME. */
2181 break;
2182 EOF
2183 fi
2184
2185 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2186 fragment <<EOF
2187 $PARSE_AND_LIST_ARGS_CASES
2188 EOF
2189 fi
2190
2191 fragment <<EOF
2192 }
2193
2194 return TRUE;
2195 }
2196
2197 EOF
2198
2199 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2200 fragment <<EOF
2201
2202 static void
2203 gld${EMULATION_NAME}_list_options (FILE * file)
2204 {
2205 fprintf (file, _("\
2206 --build-id[=STYLE] Generate build ID note\n"));
2207 EOF
2208
2209 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2210 fragment <<EOF
2211 fprintf (file, _("\
2212 -Bgroup Selects group name lookup rules for DSO\n"));
2213 fprintf (file, _("\
2214 --disable-new-dtags Disable new dynamic tags\n"));
2215 fprintf (file, _("\
2216 --enable-new-dtags Enable new dynamic tags\n"));
2217 fprintf (file, _("\
2218 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2219 fprintf (file, _("\
2220 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2221 fprintf (file, _("\
2222 -z combreloc Merge dynamic relocs into one section and sort\n"));
2223 fprintf (file, _("\
2224 -z defs Report unresolved symbols in object files.\n"));
2225 fprintf (file, _("\
2226 -z execstack Mark executable as requiring executable stack\n"));
2227 fprintf (file, _("\
2228 -z initfirst Mark DSO to be initialized first at runtime\n"));
2229 fprintf (file, _("\
2230 -z interpose Mark object to interpose all DSOs but executable\n"));
2231 fprintf (file, _("\
2232 -z lazy Mark object lazy runtime binding (default)\n"));
2233 fprintf (file, _("\
2234 -z loadfltr Mark object requiring immediate process\n"));
2235 fprintf (file, _("\
2236 -z muldefs Allow multiple definitions\n"));
2237 fprintf (file, _("\
2238 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2239 fprintf (file, _("\
2240 -z nocopyreloc Don't create copy relocs\n"));
2241 fprintf (file, _("\
2242 -z nodefaultlib Mark object not to use default search paths\n"));
2243 fprintf (file, _("\
2244 -z nodelete Mark DSO non-deletable at runtime\n"));
2245 fprintf (file, _("\
2246 -z nodlopen Mark DSO not available to dlopen\n"));
2247 fprintf (file, _("\
2248 -z nodump Mark DSO not available to dldump\n"));
2249 fprintf (file, _("\
2250 -z noexecstack Mark executable as not requiring executable stack\n"));
2251 EOF
2252
2253 if test -n "$COMMONPAGESIZE"; then
2254 fragment <<EOF
2255 fprintf (file, _("\
2256 -z norelro Don't create RELRO program header\n"));
2257 EOF
2258 fi
2259
2260 fragment <<EOF
2261 fprintf (file, _("\
2262 -z now Mark object non-lazy runtime binding\n"));
2263 fprintf (file, _("\
2264 -z origin Mark object requiring immediate \$ORIGIN\n\
2265 processing at runtime\n"));
2266 EOF
2267
2268 if test -n "$COMMONPAGESIZE"; then
2269 fragment <<EOF
2270 fprintf (file, _("\
2271 -z relro Create RELRO program header\n"));
2272 EOF
2273 fi
2274
2275 fragment <<EOF
2276 fprintf (file, _("\
2277 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2278 fprintf (file, _("\
2279 -z common-page-size=SIZE Set common page size to SIZE\n"));
2280 fprintf (file, _("\
2281 -z KEYWORD Ignored for Solaris compatibility\n"));
2282 EOF
2283 fi
2284
2285 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2286 fragment <<EOF
2287 $PARSE_AND_LIST_OPTIONS
2288 EOF
2289 fi
2290
2291 fragment <<EOF
2292 }
2293 EOF
2294
2295 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2296 fragment <<EOF
2297 $PARSE_AND_LIST_EPILOGUE
2298 EOF
2299 fi
2300 fi
2301 else
2302 fragment <<EOF
2303 #define gld${EMULATION_NAME}_add_options NULL
2304 #define gld${EMULATION_NAME}_handle_option NULL
2305 EOF
2306 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2307 fragment <<EOF
2308 #define gld${EMULATION_NAME}_list_options NULL
2309 EOF
2310 fi
2311 fi
2312
2313 fragment <<EOF
2314
2315 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2316 {
2317 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2318 ${LDEMUL_SYSLIB-syslib_default},
2319 ${LDEMUL_HLL-hll_default},
2320 ${LDEMUL_AFTER_PARSE-after_parse_default},
2321 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2322 ${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
2323 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2324 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2325 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2326 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2327 "${EMULATION_NAME}",
2328 "${OUTPUT_FORMAT}",
2329 ${LDEMUL_FINISH-gld${EMULATION_NAME}_finish},
2330 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2331 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2332 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2333 ${LDEMUL_SET_SYMBOLS-NULL},
2334 ${LDEMUL_PARSE_ARGS-NULL},
2335 gld${EMULATION_NAME}_add_options,
2336 gld${EMULATION_NAME}_handle_option,
2337 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2338 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2339 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2340 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2341 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2342 };
2343 EOF
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