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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 ${EMULATION_NAME}
15 Copyright (C) 1991-2014 Free Software Foundation, Inc.
16 Written by Steve Chamberlain <sac@cygnus.com>
17 ELF support by Ian Lance Taylor <ian@cygnus.com>
18
19 This file is part of the GNU Binutils.
20
21 This program is free software; you can redistribute it and/or modify
22 it under the terms of the GNU General Public License as published by
23 the Free Software Foundation; either version 3 of the License, or
24 (at your option) any later version.
25
26 This program is distributed in the hope that it will be useful,
27 but WITHOUT ANY WARRANTY; without even the implied warranty of
28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 GNU General Public License for more details.
30
31 You should have received a copy of the GNU General Public License
32 along with this program; if not, write to the Free Software
33 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
34 MA 02110-1301, USA. */
35
36 #define TARGET_IS_${EMULATION_NAME}
37
38 #include "sysdep.h"
39 #include "bfd.h"
40 #include "libiberty.h"
41 #include "safe-ctype.h"
42 #include "filenames.h"
43 #include "getopt.h"
44 #include <fcntl.h>
45
46 #include "bfdlink.h"
47
48 #include "ld.h"
49 #include "ldmain.h"
50 #include "ldmisc.h"
51 #include "ldexp.h"
52 #include "ldlang.h"
53 #include "ldfile.h"
54 #include "ldemul.h"
55 #include "ldbuildid.h"
56 #include <ldgram.h>
57 #include "elf/common.h"
58 #include "elf-bfd.h"
59 #include "filenames.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${EMULATION_NAME}_before_allocation (void);
65 static void gld${EMULATION_NAME}_after_allocation (void);
66 static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan
67 (asection *, const char *, int);
68 EOF
69
70 if [ "x${USE_LIBPATH}" = xyes ] ; then
71 case ${target} in
72 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
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 input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
103 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
104 config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
105 }
106
107 EOF
108 fi
109
110 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
111 fragment <<EOF
112 /* Handle the generation of DT_NEEDED tags. */
113
114 static bfd_boolean
115 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
116 {
117 int link_class = 0;
118
119 /* Tell the ELF linker that we don't want the output file to have a
120 DT_NEEDED entry for this file, unless it is used to resolve
121 references in a regular object. */
122 if (entry->flags.add_DT_NEEDED_for_regular)
123 link_class = DYN_AS_NEEDED;
124
125 /* Tell the ELF linker that we don't want the output file to have a
126 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
127 this file at all. */
128 if (!entry->flags.add_DT_NEEDED_for_dynamic)
129 link_class |= DYN_NO_ADD_NEEDED;
130
131 if (entry->flags.just_syms
132 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
133 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
134 entry->the_bfd);
135
136 if (link_class == 0
137 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
138 return FALSE;
139
140 bfd_elf_set_dyn_lib_class (entry->the_bfd,
141 (enum dynamic_lib_link_class) link_class);
142
143 /* Continue on with normal load_symbols processing. */
144 return FALSE;
145 }
146 EOF
147 fi
148
149 fragment <<EOF
150
151 /* These variables are required to pass information back and forth
152 between after_open and check_needed and stat_needed and vercheck. */
153
154 static struct bfd_link_needed_list *global_needed;
155 static struct stat global_stat;
156 static lang_input_statement_type *global_found;
157 static struct bfd_link_needed_list *global_vercheck_needed;
158 static bfd_boolean global_vercheck_failed;
159
160 /* These variables are used to implement target options */
161
162 static char *audit; /* colon (typically) separated list of libs */
163 static char *depaudit; /* colon (typically) separated list of libs */
164
165 /* Style of .note.gnu.build-id section. */
166 static const char *emit_note_gnu_build_id;
167
168 /* On Linux, it's possible to have different versions of the same
169 shared library linked against different versions of libc. The
170 dynamic linker somehow tags which libc version to use in
171 /etc/ld.so.cache, and, based on the libc that it sees in the
172 executable, chooses which version of the shared library to use.
173
174 We try to do a similar check here by checking whether this shared
175 library needs any other shared libraries which may conflict with
176 libraries we have already included in the link. If it does, we
177 skip it, and try to find another shared library farther on down the
178 link path.
179
180 This is called via lang_for_each_input_file.
181 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
182 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
183 a conflicting version. */
184
185 static void
186 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
187 {
188 const char *soname;
189 struct bfd_link_needed_list *l;
190
191 if (global_vercheck_failed)
192 return;
193 if (s->the_bfd == NULL
194 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
195 return;
196
197 soname = bfd_elf_get_dt_soname (s->the_bfd);
198 if (soname == NULL)
199 soname = lbasename (bfd_get_filename (s->the_bfd));
200
201 for (l = global_vercheck_needed; l != NULL; l = l->next)
202 {
203 const char *suffix;
204
205 if (filename_cmp (soname, l->name) == 0)
206 {
207 /* Probably can't happen, but it's an easy check. */
208 continue;
209 }
210
211 if (strchr (l->name, '/') != NULL)
212 continue;
213
214 suffix = strstr (l->name, ".so.");
215 if (suffix == NULL)
216 continue;
217
218 suffix += sizeof ".so." - 1;
219
220 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
221 {
222 /* Here we know that S is a dynamic object FOO.SO.VER1, and
223 the object we are considering needs a dynamic object
224 FOO.SO.VER2, and VER1 and VER2 are different. This
225 appears to be a version mismatch, so we tell the caller
226 to try a different version of this library. */
227 global_vercheck_failed = TRUE;
228 return;
229 }
230 }
231 }
232
233
234 /* See if an input file matches a DT_NEEDED entry by running stat on
235 the file. */
236
237 static void
238 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
239 {
240 struct stat st;
241 const char *suffix;
242 const char *soname;
243
244 if (global_found != NULL)
245 return;
246 if (s->the_bfd == NULL)
247 return;
248
249 /* If this input file was an as-needed entry, and wasn't found to be
250 needed at the stage it was linked, then don't say we have loaded it. */
251 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
252 return;
253
254 if (bfd_stat (s->the_bfd, &st) != 0)
255 {
256 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
257 return;
258 }
259
260 /* Some operating systems, e.g. Windows, do not provide a meaningful
261 st_ino; they always set it to zero. (Windows does provide a
262 meaningful st_dev.) Do not indicate a duplicate library in that
263 case. While there is no guarantee that a system that provides
264 meaningful inode numbers will never set st_ino to zero, this is
265 merely an optimization, so we do not need to worry about false
266 negatives. */
267 if (st.st_dev == global_stat.st_dev
268 && st.st_ino == global_stat.st_ino
269 && st.st_ino != 0)
270 {
271 global_found = s;
272 return;
273 }
274
275 /* We issue a warning if it looks like we are including two
276 different versions of the same shared library. For example,
277 there may be a problem if -lc picks up libc.so.6 but some other
278 shared library has a DT_NEEDED entry of libc.so.5. This is a
279 heuristic test, and it will only work if the name looks like
280 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
281 If we really want to issue warnings about mixing version numbers
282 of shared libraries, we need to find a better way. */
283
284 if (strchr (global_needed->name, '/') != NULL)
285 return;
286 suffix = strstr (global_needed->name, ".so.");
287 if (suffix == NULL)
288 return;
289 suffix += sizeof ".so." - 1;
290
291 soname = bfd_elf_get_dt_soname (s->the_bfd);
292 if (soname == NULL)
293 soname = lbasename (s->filename);
294
295 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
296 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
297 global_needed->name, global_needed->by, soname);
298 }
299
300 struct dt_needed
301 {
302 bfd *by;
303 const char *name;
304 };
305
306 /* This function is called for each possible name for a dynamic object
307 named by a DT_NEEDED entry. The FORCE parameter indicates whether
308 to skip the check for a conflicting version. */
309
310 static bfd_boolean
311 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
312 int force)
313 {
314 bfd *abfd;
315 const char *name = needed->name;
316 const char *soname;
317 int link_class;
318
319 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
320 if (abfd == NULL)
321 return FALSE;
322
323 /* Linker needs to decompress sections. */
324 abfd->flags |= BFD_DECOMPRESS;
325
326 if (! bfd_check_format (abfd, bfd_object))
327 {
328 bfd_close (abfd);
329 return FALSE;
330 }
331 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
332 {
333 bfd_close (abfd);
334 return FALSE;
335 }
336
337 /* For DT_NEEDED, they have to match. */
338 if (abfd->xvec != link_info.output_bfd->xvec)
339 {
340 bfd_close (abfd);
341 return FALSE;
342 }
343
344 /* Check whether this object would include any conflicting library
345 versions. If FORCE is set, then we skip this check; we use this
346 the second time around, if we couldn't find any compatible
347 instance of the shared library. */
348
349 if (! force)
350 {
351 struct bfd_link_needed_list *needs;
352
353 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
354 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
355
356 if (needs != NULL)
357 {
358 global_vercheck_needed = needs;
359 global_vercheck_failed = FALSE;
360 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
361 if (global_vercheck_failed)
362 {
363 bfd_close (abfd);
364 /* Return FALSE to force the caller to move on to try
365 another file on the search path. */
366 return FALSE;
367 }
368
369 /* But wait! It gets much worse. On Linux, if a shared
370 library does not use libc at all, we are supposed to skip
371 it the first time around in case we encounter a shared
372 library later on with the same name which does use the
373 version of libc that we want. This is much too horrible
374 to use on any system other than Linux. */
375
376 EOF
377 case ${target} in
378 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
379 fragment <<EOF
380 {
381 struct bfd_link_needed_list *l;
382
383 for (l = needs; l != NULL; l = l->next)
384 if (CONST_STRNEQ (l->name, "libc.so"))
385 break;
386 if (l == NULL)
387 {
388 bfd_close (abfd);
389 return FALSE;
390 }
391 }
392
393 EOF
394 ;;
395 esac
396 fragment <<EOF
397 }
398 }
399
400 /* We've found a dynamic object matching the DT_NEEDED entry. */
401
402 /* We have already checked that there is no other input file of the
403 same name. We must now check again that we are not including the
404 same file twice. We need to do this because on many systems
405 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
406 reference libc.so.1. If we have already included libc.so, we
407 don't want to include libc.so.1 if they are the same file, and we
408 can only check that using stat. */
409
410 if (bfd_stat (abfd, &global_stat) != 0)
411 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
412
413 /* First strip off everything before the last '/'. */
414 soname = lbasename (abfd->filename);
415
416 if (verbose)
417 info_msg (_("found %s at %s\n"), soname, name);
418
419 global_found = NULL;
420 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
421 if (global_found != NULL)
422 {
423 /* Return TRUE to indicate that we found the file, even though
424 we aren't going to do anything with it. */
425 return TRUE;
426 }
427
428 /* Specify the soname to use. */
429 bfd_elf_set_dt_needed_name (abfd, soname);
430
431 /* Tell the ELF linker that we don't want the output file to have a
432 DT_NEEDED entry for this file, unless it is used to resolve
433 references in a regular object. */
434 link_class = DYN_DT_NEEDED;
435
436 /* Tell the ELF linker that we don't want the output file to have a
437 DT_NEEDED entry for this file at all if the entry is from a file
438 with DYN_NO_ADD_NEEDED. */
439 if (needed->by != NULL
440 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
441 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
442
443 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
444
445 /* Add this file into the symbol table. */
446 if (! bfd_link_add_symbols (abfd, &link_info))
447 einfo ("%F%B: error adding symbols: %E\n", abfd);
448
449 return TRUE;
450 }
451
452
453 /* Search for a needed file in a path. */
454
455 static bfd_boolean
456 gld${EMULATION_NAME}_search_needed (const char *path,
457 struct dt_needed *n, int force)
458 {
459 const char *s;
460 const char *name = n->name;
461 size_t len;
462 struct dt_needed needed;
463
464 if (name[0] == '/')
465 return gld${EMULATION_NAME}_try_needed (n, force);
466
467 if (path == NULL || *path == '\0')
468 return FALSE;
469
470 needed.by = n->by;
471 needed.name = n->name;
472
473 len = strlen (name);
474 while (1)
475 {
476 char *filename, *sset;
477
478 s = strchr (path, config.rpath_separator);
479 if (s == NULL)
480 s = path + strlen (path);
481
482 #if HAVE_DOS_BASED_FILE_SYSTEM
483 /* Assume a match on the second char is part of drive specifier. */
484 else if (config.rpath_separator == ':'
485 && s == path + 1
486 && ISALPHA (*path))
487 {
488 s = strchr (s + 1, config.rpath_separator);
489 if (s == NULL)
490 s = path + strlen (path);
491 }
492 #endif
493 filename = (char *) xmalloc (s - path + len + 2);
494 if (s == path)
495 sset = filename;
496 else
497 {
498 memcpy (filename, path, s - path);
499 filename[s - path] = '/';
500 sset = filename + (s - path) + 1;
501 }
502 strcpy (sset, name);
503
504 needed.name = filename;
505 if (gld${EMULATION_NAME}_try_needed (&needed, force))
506 return TRUE;
507
508 free (filename);
509
510 if (*s == '\0')
511 break;
512 path = s + 1;
513 }
514
515 return FALSE;
516 }
517
518 EOF
519 if [ "x${USE_LIBPATH}" = xyes ] ; then
520 fragment <<EOF
521
522 /* Add the sysroot to every entry in a path separated by
523 config.rpath_separator. */
524
525 static char *
526 gld${EMULATION_NAME}_add_sysroot (const char *path)
527 {
528 int len, colons, i;
529 char *ret, *p;
530
531 len = strlen (path);
532 colons = 0;
533 i = 0;
534 while (path[i])
535 if (path[i++] == config.rpath_separator)
536 colons++;
537
538 if (path[i])
539 colons++;
540
541 len = len + (colons + 1) * strlen (ld_sysroot);
542 ret = xmalloc (len + 1);
543 strcpy (ret, ld_sysroot);
544 p = ret + strlen (ret);
545 i = 0;
546 while (path[i])
547 if (path[i] == config.rpath_separator)
548 {
549 *p++ = path[i++];
550 strcpy (p, ld_sysroot);
551 p = p + strlen (p);
552 }
553 else
554 *p++ = path[i++];
555
556 *p = 0;
557 return ret;
558 }
559
560 EOF
561 case ${target} in
562 *-*-freebsd* | *-*-dragonfly*)
563 fragment <<EOF
564 /* Read the system search path the FreeBSD way rather than the Linux way. */
565 #ifdef HAVE_ELF_HINTS_H
566 #include <elf-hints.h>
567 #else
568 #include "elf-hints-local.h"
569 #endif
570
571 static bfd_boolean
572 gld${EMULATION_NAME}_check_ld_elf_hints (const struct bfd_link_needed_list *l,
573 int force)
574 {
575 static bfd_boolean initialized;
576 static char *ld_elf_hints;
577 struct dt_needed needed;
578
579 if (!initialized)
580 {
581 FILE *f;
582 char *tmppath;
583
584 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
585 f = fopen (tmppath, FOPEN_RB);
586 free (tmppath);
587 if (f != NULL)
588 {
589 struct elfhints_hdr hdr;
590
591 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
592 && hdr.magic == ELFHINTS_MAGIC
593 && hdr.version == 1)
594 {
595 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
596 {
597 char *b;
598
599 b = xmalloc (hdr.dirlistlen + 1);
600 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
601 hdr.dirlistlen + 1)
602 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
603
604 free (b);
605 }
606 }
607 fclose (f);
608 }
609
610 initialized = TRUE;
611 }
612
613 if (ld_elf_hints == NULL)
614 return FALSE;
615
616 needed.by = l->by;
617 needed.name = l->name;
618 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, &needed, force);
619 }
620 EOF
621 # FreeBSD
622 ;;
623
624 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
625 fragment <<EOF
626 /* For a native linker, check the file /etc/ld.so.conf for directories
627 in which we may find shared libraries. /etc/ld.so.conf is really
628 only meaningful on Linux. */
629
630 struct gld${EMULATION_NAME}_ld_so_conf
631 {
632 char *path;
633 size_t len, alloc;
634 };
635
636 static bfd_boolean
637 gld${EMULATION_NAME}_parse_ld_so_conf
638 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
639
640 static void
641 gld${EMULATION_NAME}_parse_ld_so_conf_include
642 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
643 const char *pattern)
644 {
645 char *newp = NULL;
646 #ifdef HAVE_GLOB
647 glob_t gl;
648 #endif
649
650 if (pattern[0] != '/')
651 {
652 char *p = strrchr (filename, '/');
653 size_t patlen = strlen (pattern) + 1;
654
655 newp = xmalloc (p - filename + 1 + patlen);
656 memcpy (newp, filename, p - filename + 1);
657 memcpy (newp + (p - filename + 1), pattern, patlen);
658 pattern = newp;
659 }
660
661 #ifdef HAVE_GLOB
662 if (glob (pattern, 0, NULL, &gl) == 0)
663 {
664 size_t i;
665
666 for (i = 0; i < gl.gl_pathc; ++i)
667 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
668 globfree (&gl);
669 }
670 #else
671 /* If we do not have glob, treat the pattern as a literal filename. */
672 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
673 #endif
674
675 if (newp)
676 free (newp);
677 }
678
679 static bfd_boolean
680 gld${EMULATION_NAME}_parse_ld_so_conf
681 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
682 {
683 FILE *f = fopen (filename, FOPEN_RT);
684 char *line;
685 size_t linelen;
686
687 if (f == NULL)
688 return FALSE;
689
690 linelen = 256;
691 line = xmalloc (linelen);
692 do
693 {
694 char *p = line, *q;
695
696 /* Normally this would use getline(3), but we need to be portable. */
697 while ((q = fgets (p, linelen - (p - line), f)) != NULL
698 && strlen (q) == linelen - (p - line) - 1
699 && line[linelen - 2] != '\n')
700 {
701 line = xrealloc (line, 2 * linelen);
702 p = line + linelen - 1;
703 linelen += linelen;
704 }
705
706 if (q == NULL && p == line)
707 break;
708
709 p = strchr (line, '\n');
710 if (p)
711 *p = '\0';
712
713 /* Because the file format does not know any form of quoting we
714 can search forward for the next '#' character and if found
715 make it terminating the line. */
716 p = strchr (line, '#');
717 if (p)
718 *p = '\0';
719
720 /* Remove leading whitespace. NUL is no whitespace character. */
721 p = line;
722 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
723 ++p;
724
725 /* If the line is blank it is ignored. */
726 if (p[0] == '\0')
727 continue;
728
729 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
730 {
731 char *dir, c;
732 p += 8;
733 do
734 {
735 while (*p == ' ' || *p == '\t')
736 ++p;
737
738 if (*p == '\0')
739 break;
740
741 dir = p;
742
743 while (*p != ' ' && *p != '\t' && *p)
744 ++p;
745
746 c = *p;
747 *p++ = '\0';
748 if (dir[0] != '\0')
749 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
750 dir);
751 }
752 while (c != '\0');
753 }
754 else
755 {
756 char *dir = p;
757 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
758 && *p != '\r' && *p != '\v')
759 ++p;
760
761 while (p != dir && p[-1] == '/')
762 --p;
763 if (info->path == NULL)
764 {
765 info->alloc = p - dir + 1 + 256;
766 info->path = xmalloc (info->alloc);
767 info->len = 0;
768 }
769 else
770 {
771 if (info->len + 1 + (p - dir) >= info->alloc)
772 {
773 info->alloc += p - dir + 256;
774 info->path = xrealloc (info->path, info->alloc);
775 }
776 info->path[info->len++] = config.rpath_separator;
777 }
778 memcpy (info->path + info->len, dir, p - dir);
779 info->len += p - dir;
780 info->path[info->len] = '\0';
781 }
782 }
783 while (! feof (f));
784 free (line);
785 fclose (f);
786 return TRUE;
787 }
788
789 static bfd_boolean
790 gld${EMULATION_NAME}_check_ld_so_conf (const struct bfd_link_needed_list *l,
791 int force)
792 {
793 static bfd_boolean initialized;
794 static char *ld_so_conf;
795 struct dt_needed needed;
796
797 if (! initialized)
798 {
799 char *tmppath;
800 struct gld${EMULATION_NAME}_ld_so_conf info;
801
802 info.path = NULL;
803 info.len = info.alloc = 0;
804 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
805 (const char *) NULL);
806 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
807 {
808 free (tmppath);
809 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
810 (const char *) NULL);
811 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
812 }
813 free (tmppath);
814
815 if (info.path)
816 {
817 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
818 free (info.path);
819 ld_so_conf = d;
820 }
821 initialized = TRUE;
822 }
823
824 if (ld_so_conf == NULL)
825 return FALSE;
826
827
828 needed.by = l->by;
829 needed.name = l->name;
830 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
831 }
832
833 EOF
834 # Linux
835 ;;
836 esac
837 fi
838 fragment <<EOF
839
840 /* See if an input file matches a DT_NEEDED entry by name. */
841
842 static void
843 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
844 {
845 const char *soname;
846
847 /* Stop looking if we've found a loaded lib. */
848 if (global_found != NULL
849 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
850 & DYN_AS_NEEDED) == 0)
851 return;
852
853 if (s->filename == NULL || s->the_bfd == NULL)
854 return;
855
856 /* Don't look for a second non-loaded as-needed lib. */
857 if (global_found != NULL
858 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
859 return;
860
861 if (filename_cmp (s->filename, global_needed->name) == 0)
862 {
863 global_found = s;
864 return;
865 }
866
867 if (s->flags.search_dirs)
868 {
869 const char *f = strrchr (s->filename, '/');
870 if (f != NULL
871 && filename_cmp (f + 1, global_needed->name) == 0)
872 {
873 global_found = s;
874 return;
875 }
876 }
877
878 soname = bfd_elf_get_dt_soname (s->the_bfd);
879 if (soname != NULL
880 && filename_cmp (soname, global_needed->name) == 0)
881 {
882 global_found = s;
883 return;
884 }
885 }
886
887 EOF
888
889 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
890 fragment <<EOF
891
892 static bfd_size_type
893 id_note_section_size (bfd *abfd ATTRIBUTE_UNUSED)
894 {
895 const char *style = emit_note_gnu_build_id;
896 bfd_size_type size;
897 bfd_size_type build_id_size;
898
899 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
900 size = (size + 3) & -(bfd_size_type) 4;
901
902 build_id_size = compute_build_id_size (style);
903 if (build_id_size)
904 size += build_id_size;
905 else
906 size = 0;
907
908 return size;
909 }
910
911 static bfd_boolean
912 write_build_id (bfd *abfd)
913 {
914 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
915 struct elf_obj_tdata *t = elf_tdata (abfd);
916 const char *style;
917 asection *asec;
918 Elf_Internal_Shdr *i_shdr;
919 unsigned char *contents, *id_bits;
920 bfd_size_type size;
921 file_ptr position;
922 Elf_External_Note *e_note;
923
924 style = t->o->build_id.style;
925 asec = t->o->build_id.sec;
926 if (bfd_is_abs_section (asec->output_section))
927 {
928 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
929 " --build-id ignored.\n"));
930 return TRUE;
931 }
932 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
933
934 if (i_shdr->contents == NULL)
935 {
936 if (asec->contents == NULL)
937 asec->contents = (unsigned char *) xmalloc (asec->size);
938 contents = asec->contents;
939 }
940 else
941 contents = i_shdr->contents + asec->output_offset;
942
943 e_note = (Elf_External_Note *) contents;
944 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
945 size = (size + 3) & -(bfd_size_type) 4;
946 id_bits = contents + size;
947 size = asec->size - size;
948
949 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
950 bfd_h_put_32 (abfd, size, &e_note->descsz);
951 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
952 memcpy (e_note->name, "GNU", sizeof "GNU");
953
954 generate_build_id (abfd, style, bed->s->checksum_contents, id_bits, size);
955
956 position = i_shdr->sh_offset + asec->output_offset;
957 size = asec->size;
958 return (bfd_seek (abfd, position, SEEK_SET) == 0
959 && bfd_bwrite (contents, size, abfd) == size);
960 }
961
962 /* Make .note.gnu.build-id section, and set up elf_tdata->build_id. */
963
964 static bfd_boolean
965 setup_build_id (bfd *ibfd)
966 {
967 asection *s;
968 bfd_size_type size;
969 flagword flags;
970
971 size = id_note_section_size (ibfd);
972 if (size == 0)
973 {
974 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
975 return FALSE;
976 }
977
978 flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
979 | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
980 s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags);
981 if (s != NULL && bfd_set_section_alignment (ibfd, s, 2))
982 {
983 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
984 t->o->build_id.after_write_object_contents = &write_build_id;
985 t->o->build_id.style = emit_note_gnu_build_id;
986 t->o->build_id.sec = s;
987 elf_section_type (s) = SHT_NOTE;
988 s->size = size;
989 return TRUE;
990 }
991
992 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
993 " --build-id ignored.\n");
994 return FALSE;
995 }
996
997 /* This is called after all the input files have been opened. */
998
999 static void
1000 gld${EMULATION_NAME}_after_open (void)
1001 {
1002 struct bfd_link_needed_list *needed, *l;
1003 struct elf_link_hash_table *htab;
1004
1005 after_open_default ();
1006
1007 htab = elf_hash_table (&link_info);
1008 if (!is_elf_hash_table (htab))
1009 return;
1010
1011 if (emit_note_gnu_build_id != NULL)
1012 {
1013 bfd *abfd;
1014
1015 /* Find an ELF input. */
1016 for (abfd = link_info.input_bfds;
1017 abfd != (bfd *) NULL; abfd = abfd->link_next)
1018 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1019 break;
1020
1021 /* PR 10555: If there are no ELF input files do not try to
1022 create a .note.gnu-build-id section. */
1023 if (abfd == NULL
1024 || !setup_build_id (abfd))
1025 {
1026 free ((char *) emit_note_gnu_build_id);
1027 emit_note_gnu_build_id = NULL;
1028 }
1029 }
1030
1031 if (link_info.relocatable)
1032 {
1033 if (link_info.execstack == ! link_info.noexecstack)
1034 /* PR ld/16744: If "-z [no]execstack" has been specified on the
1035 command line and we are perfoming a relocatable link then no
1036 PT_GNU_STACK segment will be created and so the
1037 linkinfo.[no]execstack values set in _handle_option() will have no
1038 effect. Instead we create a .note.GNU-stack section in much the
1039 same way as the assembler does with its --[no]execstack option. */
1040 (void) bfd_make_section_with_flags (link_info.input_bfds,
1041 ".note.GNU-stack",
1042 SEC_READONLY | (link_info.execstack ? SEC_CODE : 0));
1043
1044 return;
1045 }
1046
1047 if (link_info.eh_frame_hdr
1048 && !link_info.traditional_format)
1049 {
1050 bfd *abfd, *elfbfd = NULL;
1051 bfd_boolean warn_eh_frame = FALSE;
1052 asection *s;
1053
1054 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1055 {
1056 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1057 elfbfd = abfd;
1058 if (!warn_eh_frame)
1059 {
1060 s = bfd_get_section_by_name (abfd, ".eh_frame");
1061 while (s != NULL
1062 && (s->size <= 8
1063 || bfd_is_abs_section (s->output_section)))
1064 s = bfd_get_next_section_by_name (s);
1065 warn_eh_frame = s != NULL;
1066 }
1067 if (elfbfd && warn_eh_frame)
1068 break;
1069 }
1070 if (elfbfd)
1071 {
1072 const struct elf_backend_data *bed;
1073
1074 bed = get_elf_backend_data (elfbfd);
1075 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1076 bed->dynamic_sec_flags
1077 | SEC_READONLY);
1078 if (s != NULL
1079 && bfd_set_section_alignment (elfbfd, s, 2))
1080 {
1081 htab->eh_info.hdr_sec = s;
1082 warn_eh_frame = FALSE;
1083 }
1084 }
1085 if (warn_eh_frame)
1086 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1087 " --eh-frame-hdr ignored.\n");
1088 }
1089
1090 /* Get the list of files which appear in DT_NEEDED entries in
1091 dynamic objects included in the link (often there will be none).
1092 For each such file, we want to track down the corresponding
1093 library, and include the symbol table in the link. This is what
1094 the runtime dynamic linker will do. Tracking the files down here
1095 permits one dynamic object to include another without requiring
1096 special action by the person doing the link. Note that the
1097 needed list can actually grow while we are stepping through this
1098 loop. */
1099 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1100 for (l = needed; l != NULL; l = l->next)
1101 {
1102 struct bfd_link_needed_list *ll;
1103 struct dt_needed n, nn;
1104 int force;
1105
1106 /* If the lib that needs this one was --as-needed and wasn't
1107 found to be needed, then this lib isn't needed either. */
1108 if (l->by != NULL
1109 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1110 continue;
1111
1112 /* Skip the lib if --no-copy-dt-needed-entries and
1113 --allow-shlib-undefined is in effect. */
1114 if (l->by != NULL
1115 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1116 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1117 continue;
1118
1119 /* If we've already seen this file, skip it. */
1120 for (ll = needed; ll != l; ll = ll->next)
1121 if ((ll->by == NULL
1122 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1123 && strcmp (ll->name, l->name) == 0)
1124 break;
1125 if (ll != l)
1126 continue;
1127
1128 /* See if this file was included in the link explicitly. */
1129 global_needed = l;
1130 global_found = NULL;
1131 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1132 if (global_found != NULL
1133 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1134 & DYN_AS_NEEDED) == 0)
1135 continue;
1136
1137 n.by = l->by;
1138 n.name = l->name;
1139 nn.by = l->by;
1140 if (verbose)
1141 info_msg (_("%s needed by %B\n"), l->name, l->by);
1142
1143 /* As-needed libs specified on the command line (or linker script)
1144 take priority over libs found in search dirs. */
1145 if (global_found != NULL)
1146 {
1147 nn.name = global_found->filename;
1148 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1149 continue;
1150 }
1151
1152 /* We need to find this file and include the symbol table. We
1153 want to search for the file in the same way that the dynamic
1154 linker will search. That means that we want to use
1155 rpath_link, rpath, then the environment variable
1156 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1157 entries (native only), then the linker script LIB_SEARCH_DIRS.
1158 We do not search using the -L arguments.
1159
1160 We search twice. The first time, we skip objects which may
1161 introduce version mismatches. The second time, we force
1162 their use. See gld${EMULATION_NAME}_vercheck comment. */
1163 for (force = 0; force < 2; force++)
1164 {
1165 size_t len;
1166 search_dirs_type *search;
1167 EOF
1168 if [ "x${NATIVE}" = xyes ] ; then
1169 fragment <<EOF
1170 const char *lib_path;
1171 EOF
1172 fi
1173 if [ "x${USE_LIBPATH}" = xyes ] ; then
1174 fragment <<EOF
1175 struct bfd_link_needed_list *rp;
1176 int found;
1177 EOF
1178 fi
1179 fragment <<EOF
1180
1181 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1182 &n, force))
1183 break;
1184 EOF
1185 if [ "x${USE_LIBPATH}" = xyes ] ; then
1186 fragment <<EOF
1187 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1188 &n, force))
1189 break;
1190 EOF
1191 fi
1192 if [ "x${NATIVE}" = xyes ] ; then
1193 fragment <<EOF
1194 if (command_line.rpath_link == NULL
1195 && command_line.rpath == NULL)
1196 {
1197 lib_path = (const char *) getenv ("LD_RUN_PATH");
1198 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1199 force))
1200 break;
1201 }
1202 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1203 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1204 break;
1205 EOF
1206 fi
1207 if [ "x${USE_LIBPATH}" = xyes ] ; then
1208 fragment <<EOF
1209 found = 0;
1210 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1211 for (; !found && rp != NULL; rp = rp->next)
1212 {
1213 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1214 found = (rp->by == l->by
1215 && gld${EMULATION_NAME}_search_needed (tmpname,
1216 &n,
1217 force));
1218 free (tmpname);
1219 }
1220 if (found)
1221 break;
1222
1223 EOF
1224 fi
1225 if [ "x${USE_LIBPATH}" = xyes ] ; then
1226 case ${target} in
1227 *-*-freebsd* | *-*-dragonfly*)
1228 fragment <<EOF
1229 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1230 break;
1231 EOF
1232 # FreeBSD
1233 ;;
1234
1235 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1236 fragment <<EOF
1237 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1238 break;
1239
1240 EOF
1241 # Linux
1242 ;;
1243 esac
1244 fi
1245 fragment <<EOF
1246 len = strlen (l->name);
1247 for (search = search_head; search != NULL; search = search->next)
1248 {
1249 char *filename;
1250
1251 if (search->cmdline)
1252 continue;
1253 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1254 sprintf (filename, "%s/%s", search->name, l->name);
1255 nn.name = filename;
1256 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1257 break;
1258 free (filename);
1259 }
1260 if (search != NULL)
1261 break;
1262 EOF
1263 fragment <<EOF
1264 }
1265
1266 if (force < 2)
1267 continue;
1268
1269 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1270 l->name, l->by);
1271 }
1272 }
1273
1274 EOF
1275 fi
1276
1277 fragment <<EOF
1278
1279 /* Look through an expression for an assignment statement. */
1280
1281 static void
1282 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1283 {
1284 bfd_boolean provide = FALSE;
1285
1286 switch (exp->type.node_class)
1287 {
1288 case etree_provide:
1289 case etree_provided:
1290 provide = TRUE;
1291 /* Fall thru */
1292 case etree_assign:
1293 /* We call record_link_assignment even if the symbol is defined.
1294 This is because if it is defined by a dynamic object, we
1295 actually want to use the value defined by the linker script,
1296 not the value from the dynamic object (because we are setting
1297 symbols like etext). If the symbol is defined by a regular
1298 object, then, as it happens, calling record_link_assignment
1299 will do no harm. */
1300 if (strcmp (exp->assign.dst, ".") != 0)
1301 {
1302 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1303 &link_info,
1304 exp->assign.dst, provide,
1305 exp->assign.hidden))
1306 einfo ("%P%F: failed to record assignment to %s: %E\n",
1307 exp->assign.dst);
1308 }
1309 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1310 break;
1311
1312 case etree_binary:
1313 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1314 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1315 break;
1316
1317 case etree_trinary:
1318 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1319 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1320 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1321 break;
1322
1323 case etree_unary:
1324 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1325 break;
1326
1327 default:
1328 break;
1329 }
1330 }
1331
1332
1333 /* This is called by the before_allocation routine via
1334 lang_for_each_statement. It locates any assignment statements, and
1335 tells the ELF backend about them, in case they are assignments to
1336 symbols which are referred to by dynamic objects. */
1337
1338 static void
1339 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1340 {
1341 if (s->header.type == lang_assignment_statement_enum)
1342 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1343 }
1344
1345 EOF
1346
1347 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1348 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1349 ELF_INTERPRETER_SET_DEFAULT="
1350 if (sinterp != NULL)
1351 {
1352 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1353 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1354 }
1355
1356 "
1357 else
1358 ELF_INTERPRETER_SET_DEFAULT=
1359 fi
1360 fragment <<EOF
1361
1362 /* used by before_allocation and handle_option. */
1363 static void
1364 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1365 {
1366 if (*to == NULL)
1367 *to = xstrdup (op_arg);
1368 else
1369 {
1370 size_t to_len = strlen (*to);
1371 size_t op_arg_len = strlen (op_arg);
1372 char *buf;
1373 char *cp = *to;
1374
1375 /* First see whether OPTARG is already in the path. */
1376 do
1377 {
1378 if (strncmp (op_arg, cp, op_arg_len) == 0
1379 && (cp[op_arg_len] == 0
1380 || cp[op_arg_len] == config.rpath_separator))
1381 /* We found it. */
1382 break;
1383
1384 /* Not yet found. */
1385 cp = strchr (cp, config.rpath_separator);
1386 if (cp != NULL)
1387 ++cp;
1388 }
1389 while (cp != NULL);
1390
1391 if (cp == NULL)
1392 {
1393 buf = xmalloc (to_len + op_arg_len + 2);
1394 sprintf (buf, "%s%c%s", *to,
1395 config.rpath_separator, op_arg);
1396 free (*to);
1397 *to = buf;
1398 }
1399 }
1400 }
1401
1402 /* This is called after the sections have been attached to output
1403 sections, but before any sizes or addresses have been set. */
1404
1405 static void
1406 gld${EMULATION_NAME}_before_allocation (void)
1407 {
1408 const char *rpath;
1409 asection *sinterp;
1410 bfd *abfd;
1411 struct elf_link_hash_entry *ehdr_start = NULL;
1412 struct bfd_link_hash_entry ehdr_start_save = ehdr_start_save;
1413
1414 if (is_elf_hash_table (link_info.hash))
1415 {
1416 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1417
1418 /* Make __ehdr_start hidden if it has been referenced, to
1419 prevent the symbol from being dynamic. */
1420 if (!link_info.relocatable)
1421 {
1422 struct elf_link_hash_entry *h
1423 = elf_link_hash_lookup (elf_hash_table (&link_info), "__ehdr_start",
1424 FALSE, FALSE, TRUE);
1425
1426 /* Only adjust the export class if the symbol was referenced
1427 and not defined, otherwise leave it alone. */
1428 if (h != NULL
1429 && (h->root.type == bfd_link_hash_new
1430 || h->root.type == bfd_link_hash_undefined
1431 || h->root.type == bfd_link_hash_undefweak
1432 || h->root.type == bfd_link_hash_common))
1433 {
1434 _bfd_elf_link_hash_hide_symbol (&link_info, h, TRUE);
1435 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
1436 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
1437 /* Don't leave the symbol undefined. Undefined hidden
1438 symbols typically won't have dynamic relocations, but
1439 we most likely will need dynamic relocations for
1440 __ehdr_start if we are building a PIE or shared
1441 library. */
1442 ehdr_start = h;
1443 ehdr_start_save = h->root;
1444 h->root.type = bfd_link_hash_defined;
1445 h->root.u.def.section = bfd_abs_section_ptr;
1446 h->root.u.def.value = 0;
1447 }
1448 }
1449
1450 /* If we are going to make any variable assignments, we need to
1451 let the ELF backend know about them in case the variables are
1452 referred to by dynamic objects. */
1453 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1454 }
1455
1456 /* Let the ELF backend work out the sizes of any sections required
1457 by dynamic linking. */
1458 rpath = command_line.rpath;
1459 if (rpath == NULL)
1460 rpath = (const char *) getenv ("LD_RUN_PATH");
1461
1462 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1463 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1464 {
1465 const char *audit_libs = elf_dt_audit (abfd);
1466
1467 /* If the input bfd contains an audit entry, we need to add it as
1468 a dep audit entry. */
1469 if (audit_libs && *audit_libs != '\0')
1470 {
1471 char *cp = xstrdup (audit_libs);
1472 do
1473 {
1474 int more = 0;
1475 char *cp2 = strchr (cp, config.rpath_separator);
1476
1477 if (cp2)
1478 {
1479 *cp2 = '\0';
1480 more = 1;
1481 }
1482
1483 if (cp != NULL && *cp != '\0')
1484 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1485
1486 cp = more ? ++cp2 : NULL;
1487 }
1488 while (cp != NULL);
1489 }
1490 }
1491
1492 if (! (bfd_elf_size_dynamic_sections
1493 (link_info.output_bfd, command_line.soname, rpath,
1494 command_line.filter_shlib, audit, depaudit,
1495 (const char * const *) command_line.auxiliary_filters,
1496 &link_info, &sinterp)))
1497 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1498
1499 ${ELF_INTERPRETER_SET_DEFAULT}
1500 /* Let the user override the dynamic linker we are using. */
1501 if (command_line.interpreter != NULL
1502 && sinterp != NULL)
1503 {
1504 sinterp->contents = (bfd_byte *) command_line.interpreter;
1505 sinterp->size = strlen (command_line.interpreter) + 1;
1506 }
1507
1508 /* Look for any sections named .gnu.warning. As a GNU extensions,
1509 we treat such sections as containing warning messages. We print
1510 out the warning message, and then zero out the section size so
1511 that it does not get copied into the output file. */
1512
1513 {
1514 LANG_FOR_EACH_INPUT_STATEMENT (is)
1515 {
1516 asection *s;
1517 bfd_size_type sz;
1518 char *msg;
1519 bfd_boolean ret;
1520
1521 if (is->flags.just_syms)
1522 continue;
1523
1524 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1525 if (s == NULL)
1526 continue;
1527
1528 sz = s->size;
1529 msg = (char *) xmalloc ((size_t) (sz + 1));
1530 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1531 (file_ptr) 0, sz))
1532 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1533 is->the_bfd);
1534 msg[sz] = '\0';
1535 ret = link_info.callbacks->warning (&link_info, msg,
1536 (const char *) NULL,
1537 is->the_bfd, (asection *) NULL,
1538 (bfd_vma) 0);
1539 ASSERT (ret);
1540 free (msg);
1541
1542 /* Clobber the section size, so that we don't waste space
1543 copying the warning into the output file. If we've already
1544 sized the output section, adjust its size. The adjustment
1545 is on rawsize because targets that size sections early will
1546 have called lang_reset_memory_regions after sizing. */
1547 if (s->output_section != NULL
1548 && s->output_section->rawsize >= s->size)
1549 s->output_section->rawsize -= s->size;
1550
1551 s->size = 0;
1552
1553 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1554 warning section don't get copied to the output. */
1555 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1556 }
1557 }
1558
1559 before_allocation_default ();
1560
1561 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1562 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1563
1564 if (ehdr_start != NULL)
1565 {
1566 /* If we twiddled __ehdr_start to defined earlier, put it back
1567 as it was. */
1568 ehdr_start->root.type = ehdr_start_save.type;
1569 ehdr_start->root.u = ehdr_start_save.u;
1570 }
1571 }
1572
1573 EOF
1574 fi
1575
1576 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1577 fragment <<EOF
1578
1579 /* Try to open a dynamic archive. This is where we know that ELF
1580 dynamic libraries have an extension of .so (or .sl on oddball systems
1581 like hpux). */
1582
1583 static bfd_boolean
1584 gld${EMULATION_NAME}_open_dynamic_archive
1585 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1586 {
1587 const char *filename;
1588 char *string;
1589 size_t len;
1590 bfd_boolean opened = FALSE;
1591
1592 if (! entry->flags.maybe_archive)
1593 return FALSE;
1594
1595 filename = entry->filename;
1596 len = strlen (search->name) + strlen (filename);
1597 if (entry->flags.full_name_provided)
1598 {
1599 len += sizeof "/";
1600 string = (char *) xmalloc (len);
1601 sprintf (string, "%s/%s", search->name, filename);
1602 }
1603 else
1604 {
1605 size_t xlen = 0;
1606
1607 len += strlen (arch) + sizeof "/lib.so";
1608 #ifdef EXTRA_SHLIB_EXTENSION
1609 xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
1610 ? strlen (EXTRA_SHLIB_EXTENSION) - 3
1611 : 0);
1612 #endif
1613 string = (char *) xmalloc (len + xlen);
1614 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1615 #ifdef EXTRA_SHLIB_EXTENSION
1616 /* Try the .so extension first. If that fails build a new filename
1617 using EXTRA_SHLIB_EXTENSION. */
1618 opened = ldfile_try_open_bfd (string, entry);
1619 if (!opened)
1620 strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
1621 #endif
1622 }
1623
1624 if (!opened && !ldfile_try_open_bfd (string, entry))
1625 {
1626 free (string);
1627 return FALSE;
1628 }
1629
1630 entry->filename = string;
1631
1632 /* We have found a dynamic object to include in the link. The ELF
1633 backend linker will create a DT_NEEDED entry in the .dynamic
1634 section naming this file. If this file includes a DT_SONAME
1635 entry, it will be used. Otherwise, the ELF linker will just use
1636 the name of the file. For an archive found by searching, like
1637 this one, the DT_NEEDED entry should consist of just the name of
1638 the file, without the path information used to find it. Note
1639 that we only need to do this if we have a dynamic object; an
1640 archive will never be referenced by a DT_NEEDED entry.
1641
1642 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1643 very pretty. I haven't been able to think of anything that is
1644 pretty, though. */
1645 if (bfd_check_format (entry->the_bfd, bfd_object)
1646 && (entry->the_bfd->flags & DYNAMIC) != 0)
1647 {
1648 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1649
1650 /* Rather than duplicating the logic above. Just use the
1651 filename we recorded earlier. */
1652
1653 if (!entry->flags.full_name_provided)
1654 filename = lbasename (entry->filename);
1655 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1656 }
1657
1658 return TRUE;
1659 }
1660
1661 EOF
1662 fi
1663
1664 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1665 fragment <<EOF
1666
1667 /* A variant of lang_output_section_find used by place_orphan. */
1668
1669 static lang_output_section_statement_type *
1670 output_rel_find (asection *sec, int isdyn)
1671 {
1672 lang_output_section_statement_type *lookup;
1673 lang_output_section_statement_type *last = NULL;
1674 lang_output_section_statement_type *last_alloc = NULL;
1675 lang_output_section_statement_type *last_ro_alloc = NULL;
1676 lang_output_section_statement_type *last_rel = NULL;
1677 lang_output_section_statement_type *last_rel_alloc = NULL;
1678 int rela = sec->name[4] == 'a';
1679
1680 for (lookup = &lang_output_section_statement.head->output_section_statement;
1681 lookup != NULL;
1682 lookup = lookup->next)
1683 {
1684 if (lookup->constraint >= 0
1685 && CONST_STRNEQ (lookup->name, ".rel"))
1686 {
1687 int lookrela = lookup->name[4] == 'a';
1688
1689 /* .rel.dyn must come before all other reloc sections, to suit
1690 GNU ld.so. */
1691 if (isdyn)
1692 break;
1693
1694 /* Don't place after .rel.plt as doing so results in wrong
1695 dynamic tags. */
1696 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1697 break;
1698
1699 if (rela == lookrela || last_rel == NULL)
1700 last_rel = lookup;
1701 if ((rela == lookrela || last_rel_alloc == NULL)
1702 && lookup->bfd_section != NULL
1703 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1704 last_rel_alloc = lookup;
1705 }
1706
1707 last = lookup;
1708 if (lookup->bfd_section != NULL
1709 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1710 {
1711 last_alloc = lookup;
1712 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1713 last_ro_alloc = lookup;
1714 }
1715 }
1716
1717 if (last_rel_alloc)
1718 return last_rel_alloc;
1719
1720 if (last_rel)
1721 return last_rel;
1722
1723 if (last_ro_alloc)
1724 return last_ro_alloc;
1725
1726 if (last_alloc)
1727 return last_alloc;
1728
1729 return last;
1730 }
1731
1732 /* Place an orphan section. We use this to put random SHF_ALLOC
1733 sections in the right segment. */
1734
1735 static lang_output_section_statement_type *
1736 gld${EMULATION_NAME}_place_orphan (asection *s,
1737 const char *secname,
1738 int constraint)
1739 {
1740 static struct orphan_save hold[] =
1741 {
1742 { ".text",
1743 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1744 0, 0, 0, 0 },
1745 { ".rodata",
1746 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1747 0, 0, 0, 0 },
1748 { ".tdata",
1749 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
1750 0, 0, 0, 0 },
1751 { ".data",
1752 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1753 0, 0, 0, 0 },
1754 { ".bss",
1755 SEC_ALLOC,
1756 0, 0, 0, 0 },
1757 { 0,
1758 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1759 0, 0, 0, 0 },
1760 { ".interp",
1761 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1762 0, 0, 0, 0 },
1763 { ".sdata",
1764 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1765 0, 0, 0, 0 },
1766 { ".comment",
1767 SEC_HAS_CONTENTS,
1768 0, 0, 0, 0 },
1769 };
1770 enum orphan_save_index
1771 {
1772 orphan_text = 0,
1773 orphan_rodata,
1774 orphan_tdata,
1775 orphan_data,
1776 orphan_bss,
1777 orphan_rel,
1778 orphan_interp,
1779 orphan_sdata,
1780 orphan_nonalloc
1781 };
1782 static int orphan_init_done = 0;
1783 struct orphan_save *place;
1784 lang_output_section_statement_type *after;
1785 lang_output_section_statement_type *os;
1786 lang_output_section_statement_type *match_by_name = NULL;
1787 int isdyn = 0;
1788 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1789 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1790
1791 if (! link_info.relocatable
1792 && link_info.combreloc
1793 && (s->flags & SEC_ALLOC))
1794 {
1795 if (iself)
1796 switch (sh_type)
1797 {
1798 case SHT_RELA:
1799 secname = ".rela.dyn";
1800 isdyn = 1;
1801 break;
1802 case SHT_REL:
1803 secname = ".rel.dyn";
1804 isdyn = 1;
1805 break;
1806 default:
1807 break;
1808 }
1809 else if (CONST_STRNEQ (secname, ".rel"))
1810 {
1811 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1812 isdyn = 1;
1813 }
1814 }
1815
1816 /* Look through the script to see where to place this section. */
1817 if (constraint == 0)
1818 for (os = lang_output_section_find (secname);
1819 os != NULL;
1820 os = next_matching_output_section_statement (os, 0))
1821 {
1822 /* If we don't match an existing output section, tell
1823 lang_insert_orphan to create a new output section. */
1824 constraint = SPECIAL;
1825
1826 if (os->bfd_section != NULL
1827 && (os->bfd_section->flags == 0
1828 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1829 os->bfd_section,
1830 s->owner, s)
1831 && ((s->flags ^ os->bfd_section->flags)
1832 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1833 {
1834 /* We already have an output section statement with this
1835 name, and its bfd section has compatible flags.
1836 If the section already exists but does not have any flags
1837 set, then it has been created by the linker, probably as a
1838 result of a --section-start command line switch. */
1839 lang_add_section (&os->children, s, NULL, os);
1840 return os;
1841 }
1842
1843 /* Save unused output sections in case we can match them
1844 against orphans later. */
1845 if (os->bfd_section == NULL)
1846 match_by_name = os;
1847 }
1848
1849 /* If we didn't match an active output section, see if we matched an
1850 unused one and use that. */
1851 if (match_by_name)
1852 {
1853 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1854 return match_by_name;
1855 }
1856
1857 if (!orphan_init_done)
1858 {
1859 struct orphan_save *ho;
1860
1861 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1862 if (ho->name != NULL)
1863 {
1864 ho->os = lang_output_section_find (ho->name);
1865 if (ho->os != NULL && ho->os->flags == 0)
1866 ho->os->flags = ho->flags;
1867 }
1868 orphan_init_done = 1;
1869 }
1870
1871 /* If this is a final link, then always put .gnu.warning.SYMBOL
1872 sections into the .text section to get them out of the way. */
1873 if (link_info.executable
1874 && ! link_info.relocatable
1875 && CONST_STRNEQ (s->name, ".gnu.warning.")
1876 && hold[orphan_text].os != NULL)
1877 {
1878 os = hold[orphan_text].os;
1879 lang_add_section (&os->children, s, NULL, os);
1880 return os;
1881 }
1882
1883 /* Decide which segment the section should go in based on the
1884 section name and section flags. We put loadable .note sections
1885 right after the .interp section, so that the PT_NOTE segment is
1886 stored right after the program headers where the OS can read it
1887 in the first page. */
1888
1889 place = NULL;
1890 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1891 place = &hold[orphan_nonalloc];
1892 else if ((s->flags & SEC_ALLOC) == 0)
1893 ;
1894 else if ((s->flags & SEC_LOAD) != 0
1895 && ((iself && sh_type == SHT_NOTE)
1896 || (!iself && CONST_STRNEQ (secname, ".note"))))
1897 place = &hold[orphan_interp];
1898 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1899 place = &hold[orphan_bss];
1900 else if ((s->flags & SEC_SMALL_DATA) != 0)
1901 place = &hold[orphan_sdata];
1902 else if ((s->flags & SEC_THREAD_LOCAL) != 0)
1903 place = &hold[orphan_tdata];
1904 else if ((s->flags & SEC_READONLY) == 0)
1905 place = &hold[orphan_data];
1906 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1907 || (!iself && CONST_STRNEQ (secname, ".rel")))
1908 && (s->flags & SEC_LOAD) != 0)
1909 place = &hold[orphan_rel];
1910 else if ((s->flags & SEC_CODE) == 0)
1911 place = &hold[orphan_rodata];
1912 else
1913 place = &hold[orphan_text];
1914
1915 after = NULL;
1916 if (place != NULL)
1917 {
1918 if (place->os == NULL)
1919 {
1920 if (place->name != NULL)
1921 place->os = lang_output_section_find (place->name);
1922 else
1923 place->os = output_rel_find (s, isdyn);
1924 }
1925 after = place->os;
1926 if (after == NULL)
1927 after = lang_output_section_find_by_flags
1928 (s, &place->os, _bfd_elf_match_sections_by_type);
1929 if (after == NULL)
1930 /* *ABS* is always the first output section statement. */
1931 after = &lang_output_section_statement.head->output_section_statement;
1932 }
1933
1934 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1935 }
1936 EOF
1937 fi
1938
1939 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1940 fragment <<EOF
1941
1942 static void
1943 gld${EMULATION_NAME}_after_allocation (void)
1944 {
1945 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1946 &link_info);
1947 gld${EMULATION_NAME}_map_segments (need_layout);
1948 }
1949 EOF
1950 fi
1951
1952 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1953 fragment <<EOF
1954
1955 static char *
1956 gld${EMULATION_NAME}_get_script (int *isfile)
1957 EOF
1958
1959 if test x"$COMPILE_IN" = xyes
1960 then
1961 # Scripts compiled in.
1962
1963 # sed commands to quote an ld script as a C string.
1964 sc="-f stringify.sed"
1965
1966 fragment <<EOF
1967 {
1968 *isfile = 0;
1969
1970 if (link_info.relocatable && config.build_constructors)
1971 return
1972 EOF
1973 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1974 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1975 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1976 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1977 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1978 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1979 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1980 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1981 fi
1982 if test -n "$GENERATE_PIE_SCRIPT" ; then
1983 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1984 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
1985 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1986 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1987 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
1988 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1989 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
1990 fi
1991 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
1992 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
1993 fi
1994 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1995 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1996 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
1997 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1998 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1999 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2000 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2001 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2002 fi
2003 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2004 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2005 fi
2006 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2007 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2008 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2009 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2010 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2011 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2012 fi
2013 echo ' ; else return' >> e${EMULATION_NAME}.c
2014 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2015 echo '; }' >> e${EMULATION_NAME}.c
2016
2017 else
2018 # Scripts read from the filesystem.
2019
2020 fragment <<EOF
2021 {
2022 *isfile = 1;
2023
2024 if (link_info.relocatable && config.build_constructors)
2025 return "ldscripts/${EMULATION_NAME}.xu";
2026 else if (link_info.relocatable)
2027 return "ldscripts/${EMULATION_NAME}.xr";
2028 else if (!config.text_read_only)
2029 return "ldscripts/${EMULATION_NAME}.xbn";
2030 EOF
2031 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2032 else
2033 fragment <<EOF
2034 else if (!config.magic_demand_paged)
2035 return "ldscripts/${EMULATION_NAME}.xn";
2036 EOF
2037 fi
2038 if test -n "$GENERATE_PIE_SCRIPT" ; then
2039 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2040 fragment <<EOF
2041 else if (link_info.pie && link_info.combreloc
2042 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2043 return "ldscripts/${EMULATION_NAME}.xdw";
2044 else if (link_info.pie && link_info.combreloc)
2045 return "ldscripts/${EMULATION_NAME}.xdc";
2046 EOF
2047 fi
2048 fragment <<EOF
2049 else if (link_info.pie)
2050 return "ldscripts/${EMULATION_NAME}.xd";
2051 EOF
2052 fi
2053 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2054 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2055 fragment <<EOF
2056 else if (link_info.shared && link_info.combreloc
2057 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2058 return "ldscripts/${EMULATION_NAME}.xsw";
2059 else if (link_info.shared && link_info.combreloc)
2060 return "ldscripts/${EMULATION_NAME}.xsc";
2061 EOF
2062 fi
2063 fragment <<EOF
2064 else if (link_info.shared)
2065 return "ldscripts/${EMULATION_NAME}.xs";
2066 EOF
2067 fi
2068 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2069 fragment <<EOF
2070 else if (link_info.combreloc && link_info.relro
2071 && (link_info.flags & DF_BIND_NOW))
2072 return "ldscripts/${EMULATION_NAME}.xw";
2073 else if (link_info.combreloc)
2074 return "ldscripts/${EMULATION_NAME}.xc";
2075 EOF
2076 fi
2077 fragment <<EOF
2078 else
2079 return "ldscripts/${EMULATION_NAME}.x";
2080 }
2081
2082 EOF
2083 fi
2084 fi
2085
2086 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2087 fragment <<EOF
2088 $PARSE_AND_LIST_PROLOGUE
2089 EOF
2090 fi
2091
2092 fragment <<EOF
2093
2094 #define OPTION_DISABLE_NEW_DTAGS (400)
2095 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2096 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2097 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2098 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2099 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2100 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2101 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2102
2103 static void
2104 gld${EMULATION_NAME}_add_options
2105 (int ns, char **shortopts, int nl, struct option **longopts,
2106 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2107 {
2108 EOF
2109 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2110 fragment <<EOF
2111 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2112 EOF
2113 else
2114 fragment <<EOF
2115 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2116 EOF
2117 fi
2118 fragment <<EOF
2119 static const struct option xtra_long[] = {
2120 EOF
2121 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2122 fragment <<EOF
2123 {"audit", required_argument, NULL, OPTION_AUDIT},
2124 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2125 EOF
2126 fi
2127 fragment <<EOF
2128 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2129 EOF
2130 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2131 fragment <<EOF
2132 {"depaudit", required_argument, NULL, 'P'},
2133 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2134 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2135 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2136 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2137 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2138 EOF
2139 fi
2140 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2141 fragment <<EOF
2142 $PARSE_AND_LIST_LONGOPTS
2143 EOF
2144 fi
2145 fragment <<EOF
2146 {NULL, no_argument, NULL, 0}
2147 };
2148
2149 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2150 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2151 *longopts = (struct option *)
2152 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2153 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2154 }
2155
2156 #define DEFAULT_BUILD_ID_STYLE "sha1"
2157
2158 static bfd_boolean
2159 gld${EMULATION_NAME}_handle_option (int optc)
2160 {
2161 switch (optc)
2162 {
2163 default:
2164 return FALSE;
2165
2166 case OPTION_BUILD_ID:
2167 if (emit_note_gnu_build_id != NULL)
2168 {
2169 free ((char *) emit_note_gnu_build_id);
2170 emit_note_gnu_build_id = NULL;
2171 }
2172 if (optarg == NULL)
2173 optarg = DEFAULT_BUILD_ID_STYLE;
2174 if (strcmp (optarg, "none"))
2175 emit_note_gnu_build_id = xstrdup (optarg);
2176 break;
2177
2178 EOF
2179
2180 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2181 fragment <<EOF
2182 case OPTION_AUDIT:
2183 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2184 break;
2185
2186 case 'P':
2187 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2188 break;
2189
2190 case OPTION_DISABLE_NEW_DTAGS:
2191 link_info.new_dtags = FALSE;
2192 break;
2193
2194 case OPTION_ENABLE_NEW_DTAGS:
2195 link_info.new_dtags = TRUE;
2196 break;
2197
2198 case OPTION_EH_FRAME_HDR:
2199 link_info.eh_frame_hdr = TRUE;
2200 break;
2201
2202 case OPTION_GROUP:
2203 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2204 /* Groups must be self-contained. */
2205 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2206 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2207 break;
2208
2209 case OPTION_EXCLUDE_LIBS:
2210 add_excluded_libs (optarg);
2211 break;
2212
2213 case OPTION_HASH_STYLE:
2214 link_info.emit_hash = FALSE;
2215 link_info.emit_gnu_hash = FALSE;
2216 if (strcmp (optarg, "sysv") == 0)
2217 link_info.emit_hash = TRUE;
2218 else if (strcmp (optarg, "gnu") == 0)
2219 link_info.emit_gnu_hash = TRUE;
2220 else if (strcmp (optarg, "both") == 0)
2221 {
2222 link_info.emit_hash = TRUE;
2223 link_info.emit_gnu_hash = TRUE;
2224 }
2225 else
2226 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2227 break;
2228
2229 EOF
2230 fi
2231 fragment <<EOF
2232 case 'z':
2233 if (strcmp (optarg, "defs") == 0)
2234 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2235 else if (strcmp (optarg, "muldefs") == 0)
2236 link_info.allow_multiple_definition = TRUE;
2237 else if (CONST_STRNEQ (optarg, "max-page-size="))
2238 {
2239 char *end;
2240
2241 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2242 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2243 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2244 optarg + 14);
2245 }
2246 else if (CONST_STRNEQ (optarg, "common-page-size="))
2247 {
2248 char *end;
2249 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2250 if (*end
2251 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2252 einfo (_("%P%F: invalid common page size \`%s'\n"),
2253 optarg + 17);
2254 }
2255 else if (CONST_STRNEQ (optarg, "stack-size="))
2256 {
2257 char *end;
2258 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2259 if (*end || link_info.stacksize < 0)
2260 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2261 if (!link_info.stacksize)
2262 /* Use -1 for explicit no-stack, because zero means
2263 'default'. */
2264 link_info.stacksize = -1;
2265 }
2266 else if (strcmp (optarg, "execstack") == 0)
2267 {
2268 link_info.execstack = TRUE;
2269 link_info.noexecstack = FALSE;
2270 }
2271 else if (strcmp (optarg, "noexecstack") == 0)
2272 {
2273 link_info.noexecstack = TRUE;
2274 link_info.execstack = FALSE;
2275 }
2276 EOF
2277 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2278 fragment <<EOF
2279 else if (strcmp (optarg, "global") == 0)
2280 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2281 else if (strcmp (optarg, "initfirst") == 0)
2282 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2283 else if (strcmp (optarg, "interpose") == 0)
2284 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2285 else if (strcmp (optarg, "loadfltr") == 0)
2286 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2287 else if (strcmp (optarg, "nodefaultlib") == 0)
2288 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2289 else if (strcmp (optarg, "nodelete") == 0)
2290 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2291 else if (strcmp (optarg, "nodlopen") == 0)
2292 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2293 else if (strcmp (optarg, "nodump") == 0)
2294 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2295 else if (strcmp (optarg, "now") == 0)
2296 {
2297 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2298 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2299 }
2300 else if (strcmp (optarg, "lazy") == 0)
2301 {
2302 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2303 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2304 }
2305 else if (strcmp (optarg, "origin") == 0)
2306 {
2307 link_info.flags |= (bfd_vma) DF_ORIGIN;
2308 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2309 }
2310 else if (strcmp (optarg, "combreloc") == 0)
2311 link_info.combreloc = TRUE;
2312 else if (strcmp (optarg, "nocombreloc") == 0)
2313 link_info.combreloc = FALSE;
2314 else if (strcmp (optarg, "nocopyreloc") == 0)
2315 link_info.nocopyreloc = TRUE;
2316 else if (strcmp (optarg, "relro") == 0)
2317 link_info.relro = TRUE;
2318 else if (strcmp (optarg, "norelro") == 0)
2319 link_info.relro = FALSE;
2320 else if (strcmp (optarg, "text") == 0)
2321 link_info.error_textrel = TRUE;
2322 else if (strcmp (optarg, "notext") == 0)
2323 link_info.error_textrel = FALSE;
2324 else if (strcmp (optarg, "textoff") == 0)
2325 link_info.error_textrel = FALSE;
2326 EOF
2327 fi
2328
2329 fragment <<EOF
2330 else
2331 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2332 break;
2333 EOF
2334
2335 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2336 fragment <<EOF
2337 $PARSE_AND_LIST_ARGS_CASES
2338 EOF
2339 fi
2340
2341 fragment <<EOF
2342 }
2343
2344 return TRUE;
2345 }
2346
2347 EOF
2348
2349 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2350 fragment <<EOF
2351
2352 static void
2353 gld${EMULATION_NAME}_list_options (FILE * file)
2354 {
2355 EOF
2356 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2357 fragment <<EOF
2358 fprintf (file, _("\
2359 --audit=AUDITLIB Specify a library to use for auditing\n"));
2360 fprintf (file, _("\
2361 -Bgroup Selects group name lookup rules for DSO\n"));
2362 EOF
2363 fi
2364 fragment <<EOF
2365 fprintf (file, _("\
2366 --build-id[=STYLE] Generate build ID note\n"));
2367 EOF
2368 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2369 fragment <<EOF
2370 fprintf (file, _("\
2371 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2372 Specify a library to use for auditing dependencies\n"));
2373 fprintf (file, _("\
2374 --disable-new-dtags Disable new dynamic tags\n"));
2375 fprintf (file, _("\
2376 --enable-new-dtags Enable new dynamic tags\n"));
2377 fprintf (file, _("\
2378 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2379 fprintf (file, _("\
2380 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2381 fprintf (file, _("\
2382 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2383 fprintf (file, _("\
2384 -z combreloc Merge dynamic relocs into one section and sort\n"));
2385 EOF
2386 fi
2387
2388 fragment <<EOF
2389 fprintf (file, _("\
2390 -z common-page-size=SIZE Set common page size to SIZE\n"));
2391 fprintf (file, _("\
2392 -z defs Report unresolved symbols in object files.\n"));
2393 fprintf (file, _("\
2394 -z execstack Mark executable as requiring executable stack\n"));
2395 EOF
2396
2397 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2398 fragment <<EOF
2399 fprintf (file, _("\
2400 -z global Make symbols in DSO available for subsequently\n\
2401 loaded objects\n"));
2402 fprintf (file, _("\
2403 -z initfirst Mark DSO to be initialized first at runtime\n"));
2404 fprintf (file, _("\
2405 -z interpose Mark object to interpose all DSOs but executable\n"));
2406 fprintf (file, _("\
2407 -z lazy Mark object lazy runtime binding (default)\n"));
2408 fprintf (file, _("\
2409 -z loadfltr Mark object requiring immediate process\n"));
2410 EOF
2411 fi
2412
2413 fragment <<EOF
2414 fprintf (file, _("\
2415 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2416 fprintf (file, _("\
2417 -z muldefs Allow multiple definitions\n"));
2418 EOF
2419
2420 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2421 fragment <<EOF
2422 fprintf (file, _("\
2423 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2424 fprintf (file, _("\
2425 -z nocopyreloc Don't create copy relocs\n"));
2426 fprintf (file, _("\
2427 -z nodefaultlib Mark object not to use default search paths\n"));
2428 fprintf (file, _("\
2429 -z nodelete Mark DSO non-deletable at runtime\n"));
2430 fprintf (file, _("\
2431 -z nodlopen Mark DSO not available to dlopen\n"));
2432 fprintf (file, _("\
2433 -z nodump Mark DSO not available to dldump\n"));
2434 EOF
2435 fi
2436 fragment <<EOF
2437 fprintf (file, _("\
2438 -z noexecstack Mark executable as not requiring executable stack\n"));
2439 EOF
2440 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2441 fragment <<EOF
2442 fprintf (file, _("\
2443 -z norelro Don't create RELRO program header\n"));
2444 fprintf (file, _("\
2445 -z now Mark object non-lazy runtime binding\n"));
2446 fprintf (file, _("\
2447 -z origin Mark object requiring immediate \$ORIGIN\n\
2448 processing at runtime\n"));
2449 fprintf (file, _("\
2450 -z relro Create RELRO program header\n"));
2451 fprintf (file, _("\
2452 -z stacksize=SIZE Set size of stack segment\n"));
2453 EOF
2454 fi
2455
2456 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2457 fragment <<EOF
2458 $PARSE_AND_LIST_OPTIONS
2459 EOF
2460 fi
2461
2462 fragment <<EOF
2463 }
2464 EOF
2465
2466 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2467 fragment <<EOF
2468 $PARSE_AND_LIST_EPILOGUE
2469 EOF
2470 fi
2471 fi
2472
2473 fragment <<EOF
2474
2475 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2476 {
2477 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2478 ${LDEMUL_SYSLIB-syslib_default},
2479 ${LDEMUL_HLL-hll_default},
2480 ${LDEMUL_AFTER_PARSE-after_parse_default},
2481 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2482 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2483 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2484 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2485 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2486 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2487 "${EMULATION_NAME}",
2488 "${OUTPUT_FORMAT}",
2489 ${LDEMUL_FINISH-finish_default},
2490 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2491 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2492 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2493 ${LDEMUL_SET_SYMBOLS-NULL},
2494 ${LDEMUL_PARSE_ARGS-NULL},
2495 gld${EMULATION_NAME}_add_options,
2496 gld${EMULATION_NAME}_handle_option,
2497 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2498 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2499 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2500 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2501 ${LDEMUL_NEW_VERS_PATTERN-NULL},
2502 ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL}
2503 };
2504 EOF