include/
[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 sprintf (string, "%s/lib%s%s%s", search->name,
1520 filename, arch, EXTRA_SHLIB_EXTENSION);
1521 #endif
1522
1523 if (! ldfile_try_open_bfd (string, entry))
1524 {
1525 free (string);
1526 return FALSE;
1527 }
1528
1529 entry->filename = string;
1530
1531 /* We have found a dynamic object to include in the link. The ELF
1532 backend linker will create a DT_NEEDED entry in the .dynamic
1533 section naming this file. If this file includes a DT_SONAME
1534 entry, it will be used. Otherwise, the ELF linker will just use
1535 the name of the file. For an archive found by searching, like
1536 this one, the DT_NEEDED entry should consist of just the name of
1537 the file, without the path information used to find it. Note
1538 that we only need to do this if we have a dynamic object; an
1539 archive will never be referenced by a DT_NEEDED entry.
1540
1541 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1542 very pretty. I haven't been able to think of anything that is
1543 pretty, though. */
1544 if (bfd_check_format (entry->the_bfd, bfd_object)
1545 && (entry->the_bfd->flags & DYNAMIC) != 0)
1546 {
1547 ASSERT (entry->is_archive && entry->search_dirs_flag);
1548
1549 /* Rather than duplicating the logic above. Just use the
1550 filename we recorded earlier. */
1551
1552 filename = lbasename (entry->filename);
1553 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1554 }
1555
1556 return TRUE;
1557 }
1558
1559 EOF
1560 fi
1561
1562 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1563 fragment <<EOF
1564
1565 /* A variant of lang_output_section_find used by place_orphan. */
1566
1567 static lang_output_section_statement_type *
1568 output_rel_find (asection *sec, int isdyn)
1569 {
1570 lang_output_section_statement_type *lookup;
1571 lang_output_section_statement_type *last = NULL;
1572 lang_output_section_statement_type *last_alloc = NULL;
1573 lang_output_section_statement_type *last_ro_alloc = NULL;
1574 lang_output_section_statement_type *last_rel = NULL;
1575 lang_output_section_statement_type *last_rel_alloc = NULL;
1576 int rela = sec->name[4] == 'a';
1577
1578 for (lookup = &lang_output_section_statement.head->output_section_statement;
1579 lookup != NULL;
1580 lookup = lookup->next)
1581 {
1582 if (lookup->constraint != -1
1583 && CONST_STRNEQ (lookup->name, ".rel"))
1584 {
1585 int lookrela = lookup->name[4] == 'a';
1586
1587 /* .rel.dyn must come before all other reloc sections, to suit
1588 GNU ld.so. */
1589 if (isdyn)
1590 break;
1591
1592 /* Don't place after .rel.plt as doing so results in wrong
1593 dynamic tags. */
1594 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1595 break;
1596
1597 if (rela == lookrela || last_rel == NULL)
1598 last_rel = lookup;
1599 if ((rela == lookrela || last_rel_alloc == NULL)
1600 && lookup->bfd_section != NULL
1601 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1602 last_rel_alloc = lookup;
1603 }
1604
1605 last = lookup;
1606 if (lookup->bfd_section != NULL
1607 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1608 {
1609 last_alloc = lookup;
1610 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1611 last_ro_alloc = lookup;
1612 }
1613 }
1614
1615 if (last_rel_alloc)
1616 return last_rel_alloc;
1617
1618 if (last_rel)
1619 return last_rel;
1620
1621 if (last_ro_alloc)
1622 return last_ro_alloc;
1623
1624 if (last_alloc)
1625 return last_alloc;
1626
1627 return last;
1628 }
1629
1630 /* Place an orphan section. We use this to put random SHF_ALLOC
1631 sections in the right segment. */
1632
1633 static bfd_boolean
1634 gld${EMULATION_NAME}_place_orphan (asection *s)
1635 {
1636 static struct orphan_save hold[] =
1637 {
1638 { ".text",
1639 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1640 0, 0, 0, 0 },
1641 { ".rodata",
1642 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1643 0, 0, 0, 0 },
1644 { ".data",
1645 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1646 0, 0, 0, 0 },
1647 { ".bss",
1648 SEC_ALLOC,
1649 0, 0, 0, 0 },
1650 { 0,
1651 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1652 0, 0, 0, 0 },
1653 { ".interp",
1654 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1655 0, 0, 0, 0 },
1656 { ".sdata",
1657 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1658 0, 0, 0, 0 }
1659 };
1660 enum orphan_save_index
1661 {
1662 orphan_text = 0,
1663 orphan_rodata,
1664 orphan_data,
1665 orphan_bss,
1666 orphan_rel,
1667 orphan_interp,
1668 orphan_sdata
1669 };
1670 static int orphan_init_done = 0;
1671 struct orphan_save *place;
1672 const char *secname;
1673 lang_output_section_statement_type *after;
1674 lang_output_section_statement_type *os;
1675 int isdyn = 0;
1676 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1677 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1678
1679 secname = bfd_get_section_name (s->owner, s);
1680
1681 if (! link_info.relocatable
1682 && link_info.combreloc
1683 && (s->flags & SEC_ALLOC))
1684 {
1685 if (iself)
1686 switch (sh_type)
1687 {
1688 case SHT_RELA:
1689 secname = ".rela.dyn";
1690 isdyn = 1;
1691 break;
1692 case SHT_REL:
1693 secname = ".rel.dyn";
1694 isdyn = 1;
1695 break;
1696 default:
1697 break;
1698 }
1699 else if (CONST_STRNEQ (secname, ".rel"))
1700 {
1701 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1702 isdyn = 1;
1703 }
1704 }
1705
1706 if (isdyn || (!config.unique_orphan_sections && !unique_section_p (s)))
1707 {
1708 /* Look through the script to see where to place this section. */
1709 os = lang_output_section_find (secname);
1710
1711 if (os != NULL
1712 && (os->bfd_section == NULL
1713 || os->bfd_section->flags == 0
1714 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1715 os->bfd_section,
1716 s->owner, s)
1717 && ((s->flags ^ os->bfd_section->flags)
1718 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1719 {
1720 /* We already have an output section statement with this
1721 name, and its bfd section, if any, has compatible flags.
1722 If the section already exists but does not have any flags
1723 set, then it has been created by the linker, probably as a
1724 result of a --section-start command line switch. */
1725 lang_add_section (&os->children, s, os);
1726 return TRUE;
1727 }
1728 }
1729
1730 if (!orphan_init_done)
1731 {
1732 struct orphan_save *ho;
1733 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1734 if (ho->name != NULL)
1735 {
1736 ho->os = lang_output_section_find (ho->name);
1737 if (ho->os != NULL && ho->os->flags == 0)
1738 ho->os->flags = ho->flags;
1739 }
1740 orphan_init_done = 1;
1741 }
1742
1743 /* If this is a final link, then always put .gnu.warning.SYMBOL
1744 sections into the .text section to get them out of the way. */
1745 if (link_info.executable
1746 && ! link_info.relocatable
1747 && CONST_STRNEQ (secname, ".gnu.warning.")
1748 && hold[orphan_text].os != NULL)
1749 {
1750 lang_add_section (&hold[orphan_text].os->children, s,
1751 hold[orphan_text].os);
1752 return TRUE;
1753 }
1754
1755 /* Decide which segment the section should go in based on the
1756 section name and section flags. We put loadable .note sections
1757 right after the .interp section, so that the PT_NOTE segment is
1758 stored right after the program headers where the OS can read it
1759 in the first page. */
1760
1761 place = NULL;
1762 if ((s->flags & SEC_ALLOC) == 0)
1763 ;
1764 else if ((s->flags & SEC_LOAD) != 0
1765 && ((iself && sh_type == SHT_NOTE)
1766 || (!iself && CONST_STRNEQ (secname, ".note"))))
1767 place = &hold[orphan_interp];
1768 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
1769 place = &hold[orphan_bss];
1770 else if ((s->flags & SEC_SMALL_DATA) != 0)
1771 place = &hold[orphan_sdata];
1772 else if ((s->flags & SEC_READONLY) == 0)
1773 place = &hold[orphan_data];
1774 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1775 || (!iself && CONST_STRNEQ (secname, ".rel")))
1776 && (s->flags & SEC_LOAD) != 0)
1777 place = &hold[orphan_rel];
1778 else if ((s->flags & SEC_CODE) == 0)
1779 place = &hold[orphan_rodata];
1780 else
1781 place = &hold[orphan_text];
1782
1783 after = NULL;
1784 if (place != NULL)
1785 {
1786 if (place->os == NULL)
1787 {
1788 if (place->name != NULL)
1789 place->os = lang_output_section_find (place->name);
1790 else
1791 place->os = output_rel_find (s, isdyn);
1792 }
1793 after = place->os;
1794 if (after == NULL)
1795 after = lang_output_section_find_by_flags
1796 (s, &place->os, _bfd_elf_match_sections_by_type);
1797 if (after == NULL)
1798 /* *ABS* is always the first output section statement. */
1799 after = &lang_output_section_statement.head->output_section_statement;
1800 }
1801
1802 /* Choose a unique name for the section. This will be needed if the
1803 same section name appears in the input file with different
1804 loadable or allocatable characteristics. */
1805 if (bfd_get_section_by_name (link_info.output_bfd, secname) != NULL)
1806 {
1807 static int count = 1;
1808 secname = bfd_get_unique_section_name (link_info.output_bfd,
1809 secname, &count);
1810 if (secname == NULL)
1811 einfo ("%F%P: place_orphan failed: %E\n");
1812 }
1813
1814 lang_insert_orphan (s, secname, after, place, NULL, NULL);
1815
1816 return TRUE;
1817 }
1818 EOF
1819 fi
1820
1821 if test x"$LDEMUL_FINISH" != xgld"$EMULATION_NAME"_finish; then
1822 fragment <<EOF
1823
1824 static void
1825 gld${EMULATION_NAME}_finish (void)
1826 {
1827 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1828 &link_info);
1829
1830 gld${EMULATION_NAME}_map_segments (need_layout);
1831 finish_default ();
1832 }
1833 EOF
1834 fi
1835
1836 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1837 fragment <<EOF
1838
1839 static char *
1840 gld${EMULATION_NAME}_get_script (int *isfile)
1841 EOF
1842
1843 if test -n "$COMPILE_IN"
1844 then
1845 # Scripts compiled in.
1846
1847 # sed commands to quote an ld script as a C string.
1848 sc="-f stringify.sed"
1849
1850 fragment <<EOF
1851 {
1852 *isfile = 0;
1853
1854 if (link_info.relocatable && config.build_constructors)
1855 return
1856 EOF
1857 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1858 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1859 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1860 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1861 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1862 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1863 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1864 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1865 fi
1866 if test -n "$GENERATE_PIE_SCRIPT" ; then
1867 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1868 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
1869 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1870 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1871 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
1872 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1873 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
1874 fi
1875 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
1876 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
1877 fi
1878 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1879 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1880 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
1881 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1882 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1883 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
1884 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1885 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
1886 fi
1887 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1888 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1889 fi
1890 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1891 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
1892 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1893 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
1894 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
1895 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
1896 fi
1897 echo ' ; else return' >> e${EMULATION_NAME}.c
1898 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1899 echo '; }' >> e${EMULATION_NAME}.c
1900
1901 else
1902 # Scripts read from the filesystem.
1903
1904 fragment <<EOF
1905 {
1906 *isfile = 1;
1907
1908 if (link_info.relocatable && config.build_constructors)
1909 return "ldscripts/${EMULATION_NAME}.xu";
1910 else if (link_info.relocatable)
1911 return "ldscripts/${EMULATION_NAME}.xr";
1912 else if (!config.text_read_only)
1913 return "ldscripts/${EMULATION_NAME}.xbn";
1914 EOF
1915 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
1916 else
1917 fragment <<EOF
1918 else if (!config.magic_demand_paged)
1919 return "ldscripts/${EMULATION_NAME}.xn";
1920 EOF
1921 fi
1922 if test -n "$GENERATE_PIE_SCRIPT" ; then
1923 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1924 fragment <<EOF
1925 else if (link_info.pie && link_info.combreloc
1926 && link_info.relro && (link_info.flags & DF_BIND_NOW))
1927 return "ldscripts/${EMULATION_NAME}.xdw";
1928 else if (link_info.pie && link_info.combreloc)
1929 return "ldscripts/${EMULATION_NAME}.xdc";
1930 EOF
1931 fi
1932 fragment <<EOF
1933 else if (link_info.pie)
1934 return "ldscripts/${EMULATION_NAME}.xd";
1935 EOF
1936 fi
1937 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1938 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1939 fragment <<EOF
1940 else if (link_info.shared && link_info.combreloc
1941 && link_info.relro && (link_info.flags & DF_BIND_NOW))
1942 return "ldscripts/${EMULATION_NAME}.xsw";
1943 else if (link_info.shared && link_info.combreloc)
1944 return "ldscripts/${EMULATION_NAME}.xsc";
1945 EOF
1946 fi
1947 fragment <<EOF
1948 else if (link_info.shared)
1949 return "ldscripts/${EMULATION_NAME}.xs";
1950 EOF
1951 fi
1952 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1953 fragment <<EOF
1954 else if (link_info.combreloc && link_info.relro
1955 && (link_info.flags & DF_BIND_NOW))
1956 return "ldscripts/${EMULATION_NAME}.xw";
1957 else if (link_info.combreloc)
1958 return "ldscripts/${EMULATION_NAME}.xc";
1959 EOF
1960 fi
1961 fragment <<EOF
1962 else
1963 return "ldscripts/${EMULATION_NAME}.x";
1964 }
1965
1966 EOF
1967 fi
1968 fi
1969
1970 if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1971
1972 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
1973 fragment <<EOF
1974 $PARSE_AND_LIST_PROLOGUE
1975 EOF
1976 fi
1977
1978 fragment <<EOF
1979
1980 #define OPTION_DISABLE_NEW_DTAGS (400)
1981 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
1982 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
1983 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
1984 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
1985 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
1986 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
1987
1988 static void
1989 gld${EMULATION_NAME}_add_options
1990 (int ns, char **shortopts, int nl, struct option **longopts,
1991 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
1992 {
1993 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
1994 static const struct option xtra_long[] = {
1995 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
1996 EOF
1997
1998 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1999 fragment <<EOF
2000 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2001 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2002 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2003 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2004 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2005 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2006 EOF
2007 fi
2008
2009 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2010 fragment <<EOF
2011 $PARSE_AND_LIST_LONGOPTS
2012 EOF
2013 fi
2014
2015 fragment <<EOF
2016 {NULL, no_argument, NULL, 0}
2017 };
2018
2019 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2020 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2021 *longopts = (struct option *)
2022 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2023 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2024 }
2025
2026 #define DEFAULT_BUILD_ID_STYLE "sha1"
2027
2028 static bfd_boolean
2029 gld${EMULATION_NAME}_handle_option (int optc)
2030 {
2031 switch (optc)
2032 {
2033 default:
2034 return FALSE;
2035
2036 case OPTION_BUILD_ID:
2037 if (link_info.emit_note_gnu_build_id != NULL)
2038 {
2039 free (link_info.emit_note_gnu_build_id);
2040 link_info.emit_note_gnu_build_id = NULL;
2041 }
2042 if (optarg == NULL)
2043 optarg = DEFAULT_BUILD_ID_STYLE;
2044 if (strcmp (optarg, "none"))
2045 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2046 break;
2047
2048 EOF
2049
2050 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2051 fragment <<EOF
2052 case OPTION_DISABLE_NEW_DTAGS:
2053 link_info.new_dtags = FALSE;
2054 break;
2055
2056 case OPTION_ENABLE_NEW_DTAGS:
2057 link_info.new_dtags = TRUE;
2058 break;
2059
2060 case OPTION_EH_FRAME_HDR:
2061 link_info.eh_frame_hdr = TRUE;
2062 break;
2063
2064 case OPTION_GROUP:
2065 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2066 /* Groups must be self-contained. */
2067 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2068 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2069 break;
2070
2071 case OPTION_EXCLUDE_LIBS:
2072 add_excluded_libs (optarg);
2073 break;
2074
2075 case OPTION_HASH_STYLE:
2076 link_info.emit_hash = FALSE;
2077 link_info.emit_gnu_hash = FALSE;
2078 if (strcmp (optarg, "sysv") == 0)
2079 link_info.emit_hash = TRUE;
2080 else if (strcmp (optarg, "gnu") == 0)
2081 link_info.emit_gnu_hash = TRUE;
2082 else if (strcmp (optarg, "both") == 0)
2083 {
2084 link_info.emit_hash = TRUE;
2085 link_info.emit_gnu_hash = TRUE;
2086 }
2087 else
2088 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2089 break;
2090
2091 case 'z':
2092 if (strcmp (optarg, "initfirst") == 0)
2093 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2094 else if (strcmp (optarg, "interpose") == 0)
2095 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2096 else if (strcmp (optarg, "loadfltr") == 0)
2097 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2098 else if (strcmp (optarg, "nodefaultlib") == 0)
2099 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2100 else if (strcmp (optarg, "nodelete") == 0)
2101 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2102 else if (strcmp (optarg, "nodlopen") == 0)
2103 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2104 else if (strcmp (optarg, "nodump") == 0)
2105 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2106 else if (strcmp (optarg, "now") == 0)
2107 {
2108 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2109 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2110 }
2111 else if (strcmp (optarg, "lazy") == 0)
2112 {
2113 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2114 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2115 }
2116 else if (strcmp (optarg, "origin") == 0)
2117 {
2118 link_info.flags |= (bfd_vma) DF_ORIGIN;
2119 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2120 }
2121 else if (strcmp (optarg, "defs") == 0)
2122 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2123 else if (strcmp (optarg, "muldefs") == 0)
2124 link_info.allow_multiple_definition = TRUE;
2125 else if (strcmp (optarg, "combreloc") == 0)
2126 link_info.combreloc = TRUE;
2127 else if (strcmp (optarg, "nocombreloc") == 0)
2128 link_info.combreloc = FALSE;
2129 else if (strcmp (optarg, "nocopyreloc") == 0)
2130 link_info.nocopyreloc = TRUE;
2131 else if (strcmp (optarg, "execstack") == 0)
2132 {
2133 link_info.execstack = TRUE;
2134 link_info.noexecstack = FALSE;
2135 }
2136 else if (strcmp (optarg, "noexecstack") == 0)
2137 {
2138 link_info.noexecstack = TRUE;
2139 link_info.execstack = FALSE;
2140 }
2141 EOF
2142
2143 if test -n "$COMMONPAGESIZE"; then
2144 fragment <<EOF
2145 else if (strcmp (optarg, "relro") == 0)
2146 link_info.relro = TRUE;
2147 else if (strcmp (optarg, "norelro") == 0)
2148 link_info.relro = FALSE;
2149 EOF
2150 fi
2151
2152 fragment <<EOF
2153 else if (CONST_STRNEQ (optarg, "max-page-size="))
2154 {
2155 char *end;
2156
2157 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2158 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2159 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2160 optarg + 14);
2161 ASSERT (default_target != NULL);
2162 bfd_emul_set_maxpagesize (default_target, config.maxpagesize);
2163 }
2164 else if (CONST_STRNEQ (optarg, "common-page-size="))
2165 {
2166 char *end;
2167 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2168 if (*end
2169 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2170 einfo (_("%P%F: invalid common page size \`%s'\n"),
2171 optarg + 17);
2172 ASSERT (default_target != NULL);
2173 bfd_emul_set_commonpagesize (default_target,
2174 config.commonpagesize);
2175 }
2176 /* What about the other Solaris -z options? FIXME. */
2177 break;
2178 EOF
2179 fi
2180
2181 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2182 fragment <<EOF
2183 $PARSE_AND_LIST_ARGS_CASES
2184 EOF
2185 fi
2186
2187 fragment <<EOF
2188 }
2189
2190 return TRUE;
2191 }
2192
2193 EOF
2194
2195 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2196 fragment <<EOF
2197
2198 static void
2199 gld${EMULATION_NAME}_list_options (FILE * file)
2200 {
2201 fprintf (file, _("\
2202 --build-id[=STYLE] Generate build ID note\n"));
2203 EOF
2204
2205 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2206 fragment <<EOF
2207 fprintf (file, _("\
2208 -Bgroup Selects group name lookup rules for DSO\n"));
2209 fprintf (file, _("\
2210 --disable-new-dtags Disable new dynamic tags\n"));
2211 fprintf (file, _("\
2212 --enable-new-dtags Enable new dynamic tags\n"));
2213 fprintf (file, _("\
2214 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2215 fprintf (file, _("\
2216 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2217 fprintf (file, _("\
2218 -z combreloc Merge dynamic relocs into one section and sort\n"));
2219 fprintf (file, _("\
2220 -z defs Report unresolved symbols in object files.\n"));
2221 fprintf (file, _("\
2222 -z execstack Mark executable as requiring executable stack\n"));
2223 fprintf (file, _("\
2224 -z initfirst Mark DSO to be initialized first at runtime\n"));
2225 fprintf (file, _("\
2226 -z interpose Mark object to interpose all DSOs but executable\n"));
2227 fprintf (file, _("\
2228 -z lazy Mark object lazy runtime binding (default)\n"));
2229 fprintf (file, _("\
2230 -z loadfltr Mark object requiring immediate process\n"));
2231 fprintf (file, _("\
2232 -z muldefs Allow multiple definitions\n"));
2233 fprintf (file, _("\
2234 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2235 fprintf (file, _("\
2236 -z nocopyreloc Don't create copy relocs\n"));
2237 fprintf (file, _("\
2238 -z nodefaultlib Mark object not to use default search paths\n"));
2239 fprintf (file, _("\
2240 -z nodelete Mark DSO non-deletable at runtime\n"));
2241 fprintf (file, _("\
2242 -z nodlopen Mark DSO not available to dlopen\n"));
2243 fprintf (file, _("\
2244 -z nodump Mark DSO not available to dldump\n"));
2245 fprintf (file, _("\
2246 -z noexecstack Mark executable as not requiring executable stack\n"));
2247 EOF
2248
2249 if test -n "$COMMONPAGESIZE"; then
2250 fragment <<EOF
2251 fprintf (file, _("\
2252 -z norelro Don't create RELRO program header\n"));
2253 EOF
2254 fi
2255
2256 fragment <<EOF
2257 fprintf (file, _("\
2258 -z now Mark object non-lazy runtime binding\n"));
2259 fprintf (file, _("\
2260 -z origin Mark object requiring immediate \$ORIGIN\n\
2261 processing at runtime\n"));
2262 EOF
2263
2264 if test -n "$COMMONPAGESIZE"; then
2265 fragment <<EOF
2266 fprintf (file, _("\
2267 -z relro Create RELRO program header\n"));
2268 EOF
2269 fi
2270
2271 fragment <<EOF
2272 fprintf (file, _("\
2273 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2274 fprintf (file, _("\
2275 -z common-page-size=SIZE Set common page size to SIZE\n"));
2276 fprintf (file, _("\
2277 -z KEYWORD Ignored for Solaris compatibility\n"));
2278 EOF
2279 fi
2280
2281 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2282 fragment <<EOF
2283 $PARSE_AND_LIST_OPTIONS
2284 EOF
2285 fi
2286
2287 fragment <<EOF
2288 }
2289 EOF
2290
2291 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2292 fragment <<EOF
2293 $PARSE_AND_LIST_EPILOGUE
2294 EOF
2295 fi
2296 fi
2297 else
2298 fragment <<EOF
2299 #define gld${EMULATION_NAME}_add_options NULL
2300 #define gld${EMULATION_NAME}_handle_option NULL
2301 EOF
2302 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2303 fragment <<EOF
2304 #define gld${EMULATION_NAME}_list_options NULL
2305 EOF
2306 fi
2307 fi
2308
2309 fragment <<EOF
2310
2311 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2312 {
2313 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2314 ${LDEMUL_SYSLIB-syslib_default},
2315 ${LDEMUL_HLL-hll_default},
2316 ${LDEMUL_AFTER_PARSE-after_parse_default},
2317 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2318 ${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
2319 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2320 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2321 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2322 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2323 "${EMULATION_NAME}",
2324 "${OUTPUT_FORMAT}",
2325 ${LDEMUL_FINISH-gld${EMULATION_NAME}_finish},
2326 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2327 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2328 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2329 ${LDEMUL_SET_SYMBOLS-NULL},
2330 ${LDEMUL_PARSE_ARGS-NULL},
2331 gld${EMULATION_NAME}_add_options,
2332 gld${EMULATION_NAME}_handle_option,
2333 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2334 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2335 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2336 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2337 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2338 };
2339 EOF
This page took 0.088256 seconds and 5 git commands to generate.