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Work around a GCC uninitialized warning bug
[thirdparty/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 ${EMULATION_NAME}
15 Copyright (C) 1991-2015 Free Software Foundation, Inc.
16 Written by Steve Chamberlain <sac@cygnus.com>
17 ELF support by Ian Lance Taylor <ian@cygnus.com>
18
19 This file is part of the GNU Binutils.
20
21 This program is free software; you can redistribute it and/or modify
22 it under the terms of the GNU General Public License as published by
23 the Free Software Foundation; either version 3 of the License, or
24 (at your option) any later version.
25
26 This program is distributed in the hope that it will be useful,
27 but WITHOUT ANY WARRANTY; without even the implied warranty of
28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 GNU General Public License for more details.
30
31 You should have received a copy of the GNU General Public License
32 along with this program; if not, write to the Free Software
33 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
34 MA 02110-1301, USA. */
35
36 #define TARGET_IS_${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 && bfd_count_sections (abfd) != 0)
1020 break;
1021
1022 /* PR 10555: If there are no ELF input files do not try to
1023 create a .note.gnu-build-id section. */
1024 if (abfd == NULL
1025 || !setup_build_id (abfd))
1026 {
1027 free ((char *) emit_note_gnu_build_id);
1028 emit_note_gnu_build_id = NULL;
1029 }
1030 }
1031
1032 if (link_info.relocatable)
1033 {
1034 if (link_info.execstack == ! link_info.noexecstack)
1035 /* PR ld/16744: If "-z [no]execstack" has been specified on the
1036 command line and we are perfoming a relocatable link then no
1037 PT_GNU_STACK segment will be created and so the
1038 linkinfo.[no]execstack values set in _handle_option() will have no
1039 effect. Instead we create a .note.GNU-stack section in much the
1040 same way as the assembler does with its --[no]execstack option. */
1041 (void) bfd_make_section_with_flags (link_info.input_bfds,
1042 ".note.GNU-stack",
1043 SEC_READONLY | (link_info.execstack ? SEC_CODE : 0));
1044
1045 return;
1046 }
1047
1048 if (link_info.eh_frame_hdr
1049 && !link_info.traditional_format)
1050 {
1051 bfd *abfd, *elfbfd = NULL;
1052 bfd_boolean warn_eh_frame = FALSE;
1053 asection *s;
1054
1055 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1056 {
1057 if (bfd_count_sections (abfd) == 0)
1058 continue;
1059 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1060 elfbfd = abfd;
1061 if (!warn_eh_frame)
1062 {
1063 s = bfd_get_section_by_name (abfd, ".eh_frame");
1064 while (s != NULL
1065 && (s->size <= 8
1066 || bfd_is_abs_section (s->output_section)))
1067 s = bfd_get_next_section_by_name (s);
1068 warn_eh_frame = s != NULL;
1069 }
1070 if (elfbfd && warn_eh_frame)
1071 break;
1072 }
1073 if (elfbfd)
1074 {
1075 const struct elf_backend_data *bed;
1076
1077 bed = get_elf_backend_data (elfbfd);
1078 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1079 bed->dynamic_sec_flags
1080 | SEC_READONLY);
1081 if (s != NULL
1082 && bfd_set_section_alignment (elfbfd, s, 2))
1083 {
1084 htab->eh_info.hdr_sec = s;
1085 warn_eh_frame = FALSE;
1086 }
1087 }
1088 if (warn_eh_frame)
1089 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1090 " --eh-frame-hdr ignored.\n");
1091 }
1092
1093 /* Get the list of files which appear in DT_NEEDED entries in
1094 dynamic objects included in the link (often there will be none).
1095 For each such file, we want to track down the corresponding
1096 library, and include the symbol table in the link. This is what
1097 the runtime dynamic linker will do. Tracking the files down here
1098 permits one dynamic object to include another without requiring
1099 special action by the person doing the link. Note that the
1100 needed list can actually grow while we are stepping through this
1101 loop. */
1102 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1103 for (l = needed; l != NULL; l = l->next)
1104 {
1105 struct bfd_link_needed_list *ll;
1106 struct dt_needed n, nn;
1107 int force;
1108
1109 /* If the lib that needs this one was --as-needed and wasn't
1110 found to be needed, then this lib isn't needed either. */
1111 if (l->by != NULL
1112 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1113 continue;
1114
1115 /* Skip the lib if --no-copy-dt-needed-entries and
1116 --allow-shlib-undefined is in effect. */
1117 if (l->by != NULL
1118 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1119 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1120 continue;
1121
1122 /* If we've already seen this file, skip it. */
1123 for (ll = needed; ll != l; ll = ll->next)
1124 if ((ll->by == NULL
1125 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1126 && strcmp (ll->name, l->name) == 0)
1127 break;
1128 if (ll != l)
1129 continue;
1130
1131 /* See if this file was included in the link explicitly. */
1132 global_needed = l;
1133 global_found = NULL;
1134 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1135 if (global_found != NULL
1136 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1137 & DYN_AS_NEEDED) == 0)
1138 continue;
1139
1140 n.by = l->by;
1141 n.name = l->name;
1142 nn.by = l->by;
1143 if (verbose)
1144 info_msg (_("%s needed by %B\n"), l->name, l->by);
1145
1146 /* As-needed libs specified on the command line (or linker script)
1147 take priority over libs found in search dirs. */
1148 if (global_found != NULL)
1149 {
1150 nn.name = global_found->filename;
1151 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1152 continue;
1153 }
1154
1155 /* We need to find this file and include the symbol table. We
1156 want to search for the file in the same way that the dynamic
1157 linker will search. That means that we want to use
1158 rpath_link, rpath, then the environment variable
1159 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1160 entries (native only), then the linker script LIB_SEARCH_DIRS.
1161 We do not search using the -L arguments.
1162
1163 We search twice. The first time, we skip objects which may
1164 introduce version mismatches. The second time, we force
1165 their use. See gld${EMULATION_NAME}_vercheck comment. */
1166 for (force = 0; force < 2; force++)
1167 {
1168 size_t len;
1169 search_dirs_type *search;
1170 EOF
1171 if [ "x${NATIVE}" = xyes ] ; then
1172 fragment <<EOF
1173 const char *lib_path;
1174 EOF
1175 fi
1176 if [ "x${USE_LIBPATH}" = xyes ] ; then
1177 fragment <<EOF
1178 struct bfd_link_needed_list *rp;
1179 int found;
1180 EOF
1181 fi
1182 fragment <<EOF
1183
1184 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1185 &n, force))
1186 break;
1187 EOF
1188 if [ "x${USE_LIBPATH}" = xyes ] ; then
1189 fragment <<EOF
1190 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1191 &n, force))
1192 break;
1193 EOF
1194 fi
1195 if [ "x${NATIVE}" = xyes ] ; then
1196 fragment <<EOF
1197 if (command_line.rpath_link == NULL
1198 && command_line.rpath == NULL)
1199 {
1200 lib_path = (const char *) getenv ("LD_RUN_PATH");
1201 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1202 force))
1203 break;
1204 }
1205 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1206 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1207 break;
1208 EOF
1209 fi
1210 if [ "x${USE_LIBPATH}" = xyes ] ; then
1211 fragment <<EOF
1212 found = 0;
1213 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1214 for (; !found && rp != NULL; rp = rp->next)
1215 {
1216 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1217 found = (rp->by == l->by
1218 && gld${EMULATION_NAME}_search_needed (tmpname,
1219 &n,
1220 force));
1221 free (tmpname);
1222 }
1223 if (found)
1224 break;
1225
1226 EOF
1227 fi
1228 if [ "x${USE_LIBPATH}" = xyes ] ; then
1229 case ${target} in
1230 *-*-freebsd* | *-*-dragonfly*)
1231 fragment <<EOF
1232 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1233 break;
1234 EOF
1235 # FreeBSD
1236 ;;
1237
1238 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1239 fragment <<EOF
1240 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1241 break;
1242
1243 EOF
1244 # Linux
1245 ;;
1246 esac
1247 fi
1248 fragment <<EOF
1249 len = strlen (l->name);
1250 for (search = search_head; search != NULL; search = search->next)
1251 {
1252 char *filename;
1253
1254 if (search->cmdline)
1255 continue;
1256 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1257 sprintf (filename, "%s/%s", search->name, l->name);
1258 nn.name = filename;
1259 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1260 break;
1261 free (filename);
1262 }
1263 if (search != NULL)
1264 break;
1265 EOF
1266 fragment <<EOF
1267 }
1268
1269 if (force < 2)
1270 continue;
1271
1272 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1273 l->name, l->by);
1274 }
1275 }
1276
1277 EOF
1278 fi
1279
1280 fragment <<EOF
1281
1282 /* Look through an expression for an assignment statement. */
1283
1284 static void
1285 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1286 {
1287 bfd_boolean provide = FALSE;
1288
1289 switch (exp->type.node_class)
1290 {
1291 case etree_provide:
1292 case etree_provided:
1293 provide = TRUE;
1294 /* Fall thru */
1295 case etree_assign:
1296 /* We call record_link_assignment even if the symbol is defined.
1297 This is because if it is defined by a dynamic object, we
1298 actually want to use the value defined by the linker script,
1299 not the value from the dynamic object (because we are setting
1300 symbols like etext). If the symbol is defined by a regular
1301 object, then, as it happens, calling record_link_assignment
1302 will do no harm. */
1303 if (strcmp (exp->assign.dst, ".") != 0)
1304 {
1305 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1306 &link_info,
1307 exp->assign.dst, provide,
1308 exp->assign.hidden))
1309 einfo ("%P%F: failed to record assignment to %s: %E\n",
1310 exp->assign.dst);
1311 }
1312 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1313 break;
1314
1315 case etree_binary:
1316 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1317 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1318 break;
1319
1320 case etree_trinary:
1321 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1322 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1323 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1324 break;
1325
1326 case etree_unary:
1327 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1328 break;
1329
1330 default:
1331 break;
1332 }
1333 }
1334
1335
1336 /* This is called by the before_allocation routine via
1337 lang_for_each_statement. It locates any assignment statements, and
1338 tells the ELF backend about them, in case they are assignments to
1339 symbols which are referred to by dynamic objects. */
1340
1341 static void
1342 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1343 {
1344 if (s->header.type == lang_assignment_statement_enum)
1345 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1346 }
1347
1348 EOF
1349
1350 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1351 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1352 ELF_INTERPRETER_SET_DEFAULT="
1353 if (sinterp != NULL)
1354 {
1355 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1356 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1357 }
1358
1359 "
1360 else
1361 ELF_INTERPRETER_SET_DEFAULT=
1362 fi
1363 fragment <<EOF
1364
1365 /* used by before_allocation and handle_option. */
1366 static void
1367 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1368 {
1369 if (*to == NULL)
1370 *to = xstrdup (op_arg);
1371 else
1372 {
1373 size_t to_len = strlen (*to);
1374 size_t op_arg_len = strlen (op_arg);
1375 char *buf;
1376 char *cp = *to;
1377
1378 /* First see whether OPTARG is already in the path. */
1379 do
1380 {
1381 if (strncmp (op_arg, cp, op_arg_len) == 0
1382 && (cp[op_arg_len] == 0
1383 || cp[op_arg_len] == config.rpath_separator))
1384 /* We found it. */
1385 break;
1386
1387 /* Not yet found. */
1388 cp = strchr (cp, config.rpath_separator);
1389 if (cp != NULL)
1390 ++cp;
1391 }
1392 while (cp != NULL);
1393
1394 if (cp == NULL)
1395 {
1396 buf = xmalloc (to_len + op_arg_len + 2);
1397 sprintf (buf, "%s%c%s", *to,
1398 config.rpath_separator, op_arg);
1399 free (*to);
1400 *to = buf;
1401 }
1402 }
1403 }
1404
1405 /* This is called after the sections have been attached to output
1406 sections, but before any sizes or addresses have been set. */
1407
1408 static void
1409 gld${EMULATION_NAME}_before_allocation (void)
1410 {
1411 const char *rpath;
1412 asection *sinterp;
1413 bfd *abfd;
1414 struct elf_link_hash_entry *ehdr_start = NULL;
1415 #if defined(__GNUC__) && GCC_VERSION < 4006
1416 /* Work around a GCC uninitialized warning bug fixed in GCC 4.6. */
1417 struct bfd_link_hash_entry ehdr_start_save = ehdr_start_save;
1418 #else
1419 struct bfd_link_hash_entry ehdr_start_save;
1420 #endif
1421
1422 if (is_elf_hash_table (link_info.hash))
1423 {
1424 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1425
1426 /* Make __ehdr_start hidden if it has been referenced, to
1427 prevent the symbol from being dynamic. */
1428 if (!link_info.relocatable)
1429 {
1430 struct elf_link_hash_entry *h
1431 = elf_link_hash_lookup (elf_hash_table (&link_info), "__ehdr_start",
1432 FALSE, FALSE, TRUE);
1433
1434 /* Only adjust the export class if the symbol was referenced
1435 and not defined, otherwise leave it alone. */
1436 if (h != NULL
1437 && (h->root.type == bfd_link_hash_new
1438 || h->root.type == bfd_link_hash_undefined
1439 || h->root.type == bfd_link_hash_undefweak
1440 || h->root.type == bfd_link_hash_common))
1441 {
1442 _bfd_elf_link_hash_hide_symbol (&link_info, h, TRUE);
1443 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
1444 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
1445 /* Don't leave the symbol undefined. Undefined hidden
1446 symbols typically won't have dynamic relocations, but
1447 we most likely will need dynamic relocations for
1448 __ehdr_start if we are building a PIE or shared
1449 library. */
1450 ehdr_start = h;
1451 ehdr_start_save = h->root;
1452 h->root.type = bfd_link_hash_defined;
1453 h->root.u.def.section = bfd_abs_section_ptr;
1454 h->root.u.def.value = 0;
1455 }
1456 }
1457
1458 /* If we are going to make any variable assignments, we need to
1459 let the ELF backend know about them in case the variables are
1460 referred to by dynamic objects. */
1461 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1462 }
1463
1464 /* Let the ELF backend work out the sizes of any sections required
1465 by dynamic linking. */
1466 rpath = command_line.rpath;
1467 if (rpath == NULL)
1468 rpath = (const char *) getenv ("LD_RUN_PATH");
1469
1470 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1471 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1472 {
1473 const char *audit_libs = elf_dt_audit (abfd);
1474
1475 /* If the input bfd contains an audit entry, we need to add it as
1476 a dep audit entry. */
1477 if (audit_libs && *audit_libs != '\0')
1478 {
1479 char *cp = xstrdup (audit_libs);
1480 do
1481 {
1482 int more = 0;
1483 char *cp2 = strchr (cp, config.rpath_separator);
1484
1485 if (cp2)
1486 {
1487 *cp2 = '\0';
1488 more = 1;
1489 }
1490
1491 if (cp != NULL && *cp != '\0')
1492 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1493
1494 cp = more ? ++cp2 : NULL;
1495 }
1496 while (cp != NULL);
1497 }
1498 }
1499
1500 if (! (bfd_elf_size_dynamic_sections
1501 (link_info.output_bfd, command_line.soname, rpath,
1502 command_line.filter_shlib, audit, depaudit,
1503 (const char * const *) command_line.auxiliary_filters,
1504 &link_info, &sinterp)))
1505 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1506
1507 ${ELF_INTERPRETER_SET_DEFAULT}
1508 /* Let the user override the dynamic linker we are using. */
1509 if (command_line.interpreter != NULL
1510 && sinterp != NULL)
1511 {
1512 sinterp->contents = (bfd_byte *) command_line.interpreter;
1513 sinterp->size = strlen (command_line.interpreter) + 1;
1514 }
1515
1516 /* Look for any sections named .gnu.warning. As a GNU extensions,
1517 we treat such sections as containing warning messages. We print
1518 out the warning message, and then zero out the section size so
1519 that it does not get copied into the output file. */
1520
1521 {
1522 LANG_FOR_EACH_INPUT_STATEMENT (is)
1523 {
1524 asection *s;
1525 bfd_size_type sz;
1526 char *msg;
1527 bfd_boolean ret;
1528
1529 if (is->flags.just_syms)
1530 continue;
1531
1532 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1533 if (s == NULL)
1534 continue;
1535
1536 sz = s->size;
1537 msg = (char *) xmalloc ((size_t) (sz + 1));
1538 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1539 (file_ptr) 0, sz))
1540 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1541 is->the_bfd);
1542 msg[sz] = '\0';
1543 ret = link_info.callbacks->warning (&link_info, msg,
1544 (const char *) NULL,
1545 is->the_bfd, (asection *) NULL,
1546 (bfd_vma) 0);
1547 ASSERT (ret);
1548 free (msg);
1549
1550 /* Clobber the section size, so that we don't waste space
1551 copying the warning into the output file. If we've already
1552 sized the output section, adjust its size. The adjustment
1553 is on rawsize because targets that size sections early will
1554 have called lang_reset_memory_regions after sizing. */
1555 if (s->output_section != NULL
1556 && s->output_section->rawsize >= s->size)
1557 s->output_section->rawsize -= s->size;
1558
1559 s->size = 0;
1560
1561 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1562 warning section don't get copied to the output. */
1563 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1564 }
1565 }
1566
1567 before_allocation_default ();
1568
1569 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1570 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1571
1572 if (ehdr_start != NULL)
1573 {
1574 /* If we twiddled __ehdr_start to defined earlier, put it back
1575 as it was. */
1576 ehdr_start->root.type = ehdr_start_save.type;
1577 ehdr_start->root.u = ehdr_start_save.u;
1578 }
1579 }
1580
1581 EOF
1582 fi
1583
1584 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1585 fragment <<EOF
1586
1587 /* Try to open a dynamic archive. This is where we know that ELF
1588 dynamic libraries have an extension of .so (or .sl on oddball systems
1589 like hpux). */
1590
1591 static bfd_boolean
1592 gld${EMULATION_NAME}_open_dynamic_archive
1593 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1594 {
1595 const char *filename;
1596 char *string;
1597 size_t len;
1598 bfd_boolean opened = FALSE;
1599
1600 if (! entry->flags.maybe_archive)
1601 return FALSE;
1602
1603 filename = entry->filename;
1604 len = strlen (search->name) + strlen (filename);
1605 if (entry->flags.full_name_provided)
1606 {
1607 len += sizeof "/";
1608 string = (char *) xmalloc (len);
1609 sprintf (string, "%s/%s", search->name, filename);
1610 }
1611 else
1612 {
1613 size_t xlen = 0;
1614
1615 len += strlen (arch) + sizeof "/lib.so";
1616 #ifdef EXTRA_SHLIB_EXTENSION
1617 xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
1618 ? strlen (EXTRA_SHLIB_EXTENSION) - 3
1619 : 0);
1620 #endif
1621 string = (char *) xmalloc (len + xlen);
1622 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1623 #ifdef EXTRA_SHLIB_EXTENSION
1624 /* Try the .so extension first. If that fails build a new filename
1625 using EXTRA_SHLIB_EXTENSION. */
1626 opened = ldfile_try_open_bfd (string, entry);
1627 if (!opened)
1628 strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
1629 #endif
1630 }
1631
1632 if (!opened && !ldfile_try_open_bfd (string, entry))
1633 {
1634 free (string);
1635 return FALSE;
1636 }
1637
1638 entry->filename = string;
1639
1640 /* We have found a dynamic object to include in the link. The ELF
1641 backend linker will create a DT_NEEDED entry in the .dynamic
1642 section naming this file. If this file includes a DT_SONAME
1643 entry, it will be used. Otherwise, the ELF linker will just use
1644 the name of the file. For an archive found by searching, like
1645 this one, the DT_NEEDED entry should consist of just the name of
1646 the file, without the path information used to find it. Note
1647 that we only need to do this if we have a dynamic object; an
1648 archive will never be referenced by a DT_NEEDED entry.
1649
1650 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1651 very pretty. I haven't been able to think of anything that is
1652 pretty, though. */
1653 if (bfd_check_format (entry->the_bfd, bfd_object)
1654 && (entry->the_bfd->flags & DYNAMIC) != 0)
1655 {
1656 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1657
1658 /* Rather than duplicating the logic above. Just use the
1659 filename we recorded earlier. */
1660
1661 if (!entry->flags.full_name_provided)
1662 filename = lbasename (entry->filename);
1663 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1664 }
1665
1666 return TRUE;
1667 }
1668
1669 EOF
1670 fi
1671
1672 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1673 fragment <<EOF
1674
1675 /* A variant of lang_output_section_find used by place_orphan. */
1676
1677 static lang_output_section_statement_type *
1678 output_rel_find (asection *sec, int isdyn)
1679 {
1680 lang_output_section_statement_type *lookup;
1681 lang_output_section_statement_type *last = NULL;
1682 lang_output_section_statement_type *last_alloc = NULL;
1683 lang_output_section_statement_type *last_ro_alloc = NULL;
1684 lang_output_section_statement_type *last_rel = NULL;
1685 lang_output_section_statement_type *last_rel_alloc = NULL;
1686 int rela = sec->name[4] == 'a';
1687
1688 for (lookup = &lang_output_section_statement.head->output_section_statement;
1689 lookup != NULL;
1690 lookup = lookup->next)
1691 {
1692 if (lookup->constraint >= 0
1693 && CONST_STRNEQ (lookup->name, ".rel"))
1694 {
1695 int lookrela = lookup->name[4] == 'a';
1696
1697 /* .rel.dyn must come before all other reloc sections, to suit
1698 GNU ld.so. */
1699 if (isdyn)
1700 break;
1701
1702 /* Don't place after .rel.plt as doing so results in wrong
1703 dynamic tags. */
1704 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1705 break;
1706
1707 if (rela == lookrela || last_rel == NULL)
1708 last_rel = lookup;
1709 if ((rela == lookrela || last_rel_alloc == NULL)
1710 && lookup->bfd_section != NULL
1711 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1712 last_rel_alloc = lookup;
1713 }
1714
1715 last = lookup;
1716 if (lookup->bfd_section != NULL
1717 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1718 {
1719 last_alloc = lookup;
1720 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1721 last_ro_alloc = lookup;
1722 }
1723 }
1724
1725 if (last_rel_alloc)
1726 return last_rel_alloc;
1727
1728 if (last_rel)
1729 return last_rel;
1730
1731 if (last_ro_alloc)
1732 return last_ro_alloc;
1733
1734 if (last_alloc)
1735 return last_alloc;
1736
1737 return last;
1738 }
1739
1740 /* Place an orphan section. We use this to put random SHF_ALLOC
1741 sections in the right segment. */
1742
1743 static lang_output_section_statement_type *
1744 gld${EMULATION_NAME}_place_orphan (asection *s,
1745 const char *secname,
1746 int constraint)
1747 {
1748 static struct orphan_save hold[] =
1749 {
1750 { ".text",
1751 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1752 0, 0, 0, 0 },
1753 { ".rodata",
1754 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1755 0, 0, 0, 0 },
1756 { ".tdata",
1757 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
1758 0, 0, 0, 0 },
1759 { ".data",
1760 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1761 0, 0, 0, 0 },
1762 { ".bss",
1763 SEC_ALLOC,
1764 0, 0, 0, 0 },
1765 { 0,
1766 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1767 0, 0, 0, 0 },
1768 { ".interp",
1769 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1770 0, 0, 0, 0 },
1771 { ".sdata",
1772 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1773 0, 0, 0, 0 },
1774 { ".comment",
1775 SEC_HAS_CONTENTS,
1776 0, 0, 0, 0 },
1777 };
1778 enum orphan_save_index
1779 {
1780 orphan_text = 0,
1781 orphan_rodata,
1782 orphan_tdata,
1783 orphan_data,
1784 orphan_bss,
1785 orphan_rel,
1786 orphan_interp,
1787 orphan_sdata,
1788 orphan_nonalloc
1789 };
1790 static int orphan_init_done = 0;
1791 struct orphan_save *place;
1792 lang_output_section_statement_type *after;
1793 lang_output_section_statement_type *os;
1794 lang_output_section_statement_type *match_by_name = NULL;
1795 int isdyn = 0;
1796 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1797 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1798
1799 if (! link_info.relocatable
1800 && link_info.combreloc
1801 && (s->flags & SEC_ALLOC))
1802 {
1803 if (iself)
1804 switch (sh_type)
1805 {
1806 case SHT_RELA:
1807 secname = ".rela.dyn";
1808 isdyn = 1;
1809 break;
1810 case SHT_REL:
1811 secname = ".rel.dyn";
1812 isdyn = 1;
1813 break;
1814 default:
1815 break;
1816 }
1817 else if (CONST_STRNEQ (secname, ".rel"))
1818 {
1819 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1820 isdyn = 1;
1821 }
1822 }
1823
1824 /* Look through the script to see where to place this section. */
1825 if (constraint == 0)
1826 for (os = lang_output_section_find (secname);
1827 os != NULL;
1828 os = next_matching_output_section_statement (os, 0))
1829 {
1830 /* If we don't match an existing output section, tell
1831 lang_insert_orphan to create a new output section. */
1832 constraint = SPECIAL;
1833
1834 if (os->bfd_section != NULL
1835 && (os->bfd_section->flags == 0
1836 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1837 os->bfd_section,
1838 s->owner, s)
1839 && ((s->flags ^ os->bfd_section->flags)
1840 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1841 {
1842 /* We already have an output section statement with this
1843 name, and its bfd section has compatible flags.
1844 If the section already exists but does not have any flags
1845 set, then it has been created by the linker, probably as a
1846 result of a --section-start command line switch. */
1847 lang_add_section (&os->children, s, NULL, os);
1848 return os;
1849 }
1850
1851 /* Save unused output sections in case we can match them
1852 against orphans later. */
1853 if (os->bfd_section == NULL)
1854 match_by_name = os;
1855 }
1856
1857 /* If we didn't match an active output section, see if we matched an
1858 unused one and use that. */
1859 if (match_by_name)
1860 {
1861 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1862 return match_by_name;
1863 }
1864
1865 if (!orphan_init_done)
1866 {
1867 struct orphan_save *ho;
1868
1869 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1870 if (ho->name != NULL)
1871 {
1872 ho->os = lang_output_section_find (ho->name);
1873 if (ho->os != NULL && ho->os->flags == 0)
1874 ho->os->flags = ho->flags;
1875 }
1876 orphan_init_done = 1;
1877 }
1878
1879 /* If this is a final link, then always put .gnu.warning.SYMBOL
1880 sections into the .text section to get them out of the way. */
1881 if (link_info.executable
1882 && ! link_info.relocatable
1883 && CONST_STRNEQ (s->name, ".gnu.warning.")
1884 && hold[orphan_text].os != NULL)
1885 {
1886 os = hold[orphan_text].os;
1887 lang_add_section (&os->children, s, NULL, os);
1888 return os;
1889 }
1890
1891 /* Decide which segment the section should go in based on the
1892 section name and section flags. We put loadable .note sections
1893 right after the .interp section, so that the PT_NOTE segment is
1894 stored right after the program headers where the OS can read it
1895 in the first page. */
1896
1897 place = NULL;
1898 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1899 place = &hold[orphan_nonalloc];
1900 else if ((s->flags & SEC_ALLOC) == 0)
1901 ;
1902 else if ((s->flags & SEC_LOAD) != 0
1903 && ((iself && sh_type == SHT_NOTE)
1904 || (!iself && CONST_STRNEQ (secname, ".note"))))
1905 place = &hold[orphan_interp];
1906 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1907 place = &hold[orphan_bss];
1908 else if ((s->flags & SEC_SMALL_DATA) != 0)
1909 place = &hold[orphan_sdata];
1910 else if ((s->flags & SEC_THREAD_LOCAL) != 0)
1911 place = &hold[orphan_tdata];
1912 else if ((s->flags & SEC_READONLY) == 0)
1913 place = &hold[orphan_data];
1914 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1915 || (!iself && CONST_STRNEQ (secname, ".rel")))
1916 && (s->flags & SEC_LOAD) != 0)
1917 place = &hold[orphan_rel];
1918 else if ((s->flags & SEC_CODE) == 0)
1919 place = &hold[orphan_rodata];
1920 else
1921 place = &hold[orphan_text];
1922
1923 after = NULL;
1924 if (place != NULL)
1925 {
1926 if (place->os == NULL)
1927 {
1928 if (place->name != NULL)
1929 place->os = lang_output_section_find (place->name);
1930 else
1931 place->os = output_rel_find (s, isdyn);
1932 }
1933 after = place->os;
1934 if (after == NULL)
1935 after = lang_output_section_find_by_flags
1936 (s, &place->os, _bfd_elf_match_sections_by_type);
1937 if (after == NULL)
1938 /* *ABS* is always the first output section statement. */
1939 after = &lang_output_section_statement.head->output_section_statement;
1940 }
1941
1942 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1943 }
1944 EOF
1945 fi
1946
1947 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1948 fragment <<EOF
1949
1950 static void
1951 gld${EMULATION_NAME}_after_allocation (void)
1952 {
1953 int need_layout = bfd_elf_discard_info (link_info.output_bfd, &link_info);
1954
1955 if (need_layout < 0)
1956 einfo ("%X%P: .eh_frame/.stab edit: %E\n");
1957 else
1958 gld${EMULATION_NAME}_map_segments (need_layout);
1959 }
1960 EOF
1961 fi
1962
1963 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1964 fragment <<EOF
1965
1966 static char *
1967 gld${EMULATION_NAME}_get_script (int *isfile)
1968 EOF
1969
1970 if test x"$COMPILE_IN" = xyes
1971 then
1972 # Scripts compiled in.
1973
1974 # sed commands to quote an ld script as a C string.
1975 sc="-f stringify.sed"
1976
1977 fragment <<EOF
1978 {
1979 *isfile = 0;
1980
1981 if (link_info.relocatable && config.build_constructors)
1982 return
1983 EOF
1984 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1985 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1986 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1987 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1988 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1989 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1990 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1991 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1992 fi
1993 if test -n "$GENERATE_PIE_SCRIPT" ; then
1994 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1995 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
1996 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1997 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1998 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
1999 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2000 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2001 fi
2002 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2003 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2004 fi
2005 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2006 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2007 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2008 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2009 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2010 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2011 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2012 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2013 fi
2014 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2015 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2016 fi
2017 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2018 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2019 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2020 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2021 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2022 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2023 fi
2024 echo ' ; else return' >> e${EMULATION_NAME}.c
2025 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2026 echo '; }' >> e${EMULATION_NAME}.c
2027
2028 else
2029 # Scripts read from the filesystem.
2030
2031 fragment <<EOF
2032 {
2033 *isfile = 1;
2034
2035 if (link_info.relocatable && config.build_constructors)
2036 return "ldscripts/${EMULATION_NAME}.xu";
2037 else if (link_info.relocatable)
2038 return "ldscripts/${EMULATION_NAME}.xr";
2039 else if (!config.text_read_only)
2040 return "ldscripts/${EMULATION_NAME}.xbn";
2041 EOF
2042 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2043 else
2044 fragment <<EOF
2045 else if (!config.magic_demand_paged)
2046 return "ldscripts/${EMULATION_NAME}.xn";
2047 EOF
2048 fi
2049 if test -n "$GENERATE_PIE_SCRIPT" ; then
2050 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2051 fragment <<EOF
2052 else if (link_info.pie && link_info.combreloc
2053 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2054 return "ldscripts/${EMULATION_NAME}.xdw";
2055 else if (link_info.pie && link_info.combreloc)
2056 return "ldscripts/${EMULATION_NAME}.xdc";
2057 EOF
2058 fi
2059 fragment <<EOF
2060 else if (link_info.pie)
2061 return "ldscripts/${EMULATION_NAME}.xd";
2062 EOF
2063 fi
2064 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2065 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2066 fragment <<EOF
2067 else if (link_info.shared && link_info.combreloc
2068 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2069 return "ldscripts/${EMULATION_NAME}.xsw";
2070 else if (link_info.shared && link_info.combreloc)
2071 return "ldscripts/${EMULATION_NAME}.xsc";
2072 EOF
2073 fi
2074 fragment <<EOF
2075 else if (link_info.shared)
2076 return "ldscripts/${EMULATION_NAME}.xs";
2077 EOF
2078 fi
2079 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2080 fragment <<EOF
2081 else if (link_info.combreloc && link_info.relro
2082 && (link_info.flags & DF_BIND_NOW))
2083 return "ldscripts/${EMULATION_NAME}.xw";
2084 else if (link_info.combreloc)
2085 return "ldscripts/${EMULATION_NAME}.xc";
2086 EOF
2087 fi
2088 fragment <<EOF
2089 else
2090 return "ldscripts/${EMULATION_NAME}.x";
2091 }
2092
2093 EOF
2094 fi
2095 fi
2096
2097 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2098 fragment <<EOF
2099 $PARSE_AND_LIST_PROLOGUE
2100 EOF
2101 fi
2102
2103 fragment <<EOF
2104
2105 #define OPTION_DISABLE_NEW_DTAGS (400)
2106 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2107 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2108 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2109 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2110 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2111 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2112 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2113
2114 static void
2115 gld${EMULATION_NAME}_add_options
2116 (int ns, char **shortopts, int nl, struct option **longopts,
2117 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2118 {
2119 EOF
2120 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2121 fragment <<EOF
2122 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2123 EOF
2124 else
2125 fragment <<EOF
2126 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2127 EOF
2128 fi
2129 fragment <<EOF
2130 static const struct option xtra_long[] = {
2131 EOF
2132 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2133 fragment <<EOF
2134 {"audit", required_argument, NULL, OPTION_AUDIT},
2135 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2136 EOF
2137 fi
2138 fragment <<EOF
2139 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2140 EOF
2141 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2142 fragment <<EOF
2143 {"depaudit", required_argument, NULL, 'P'},
2144 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2145 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2146 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2147 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2148 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2149 EOF
2150 fi
2151 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2152 fragment <<EOF
2153 $PARSE_AND_LIST_LONGOPTS
2154 EOF
2155 fi
2156 fragment <<EOF
2157 {NULL, no_argument, NULL, 0}
2158 };
2159
2160 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2161 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2162 *longopts = (struct option *)
2163 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2164 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2165 }
2166
2167 #define DEFAULT_BUILD_ID_STYLE "sha1"
2168
2169 static bfd_boolean
2170 gld${EMULATION_NAME}_handle_option (int optc)
2171 {
2172 switch (optc)
2173 {
2174 default:
2175 return FALSE;
2176
2177 case OPTION_BUILD_ID:
2178 if (emit_note_gnu_build_id != NULL)
2179 {
2180 free ((char *) emit_note_gnu_build_id);
2181 emit_note_gnu_build_id = NULL;
2182 }
2183 if (optarg == NULL)
2184 optarg = DEFAULT_BUILD_ID_STYLE;
2185 if (strcmp (optarg, "none"))
2186 emit_note_gnu_build_id = xstrdup (optarg);
2187 break;
2188
2189 EOF
2190
2191 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2192 fragment <<EOF
2193 case OPTION_AUDIT:
2194 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2195 break;
2196
2197 case 'P':
2198 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2199 break;
2200
2201 case OPTION_DISABLE_NEW_DTAGS:
2202 link_info.new_dtags = FALSE;
2203 break;
2204
2205 case OPTION_ENABLE_NEW_DTAGS:
2206 link_info.new_dtags = TRUE;
2207 break;
2208
2209 case OPTION_EH_FRAME_HDR:
2210 link_info.eh_frame_hdr = TRUE;
2211 break;
2212
2213 case OPTION_GROUP:
2214 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2215 /* Groups must be self-contained. */
2216 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2217 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2218 break;
2219
2220 case OPTION_EXCLUDE_LIBS:
2221 add_excluded_libs (optarg);
2222 break;
2223
2224 case OPTION_HASH_STYLE:
2225 link_info.emit_hash = FALSE;
2226 link_info.emit_gnu_hash = FALSE;
2227 if (strcmp (optarg, "sysv") == 0)
2228 link_info.emit_hash = TRUE;
2229 else if (strcmp (optarg, "gnu") == 0)
2230 link_info.emit_gnu_hash = TRUE;
2231 else if (strcmp (optarg, "both") == 0)
2232 {
2233 link_info.emit_hash = TRUE;
2234 link_info.emit_gnu_hash = TRUE;
2235 }
2236 else
2237 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2238 break;
2239
2240 EOF
2241 fi
2242 fragment <<EOF
2243 case 'z':
2244 if (strcmp (optarg, "defs") == 0)
2245 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2246 else if (strcmp (optarg, "muldefs") == 0)
2247 link_info.allow_multiple_definition = TRUE;
2248 else if (CONST_STRNEQ (optarg, "max-page-size="))
2249 {
2250 char *end;
2251
2252 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2253 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2254 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2255 optarg + 14);
2256 }
2257 else if (CONST_STRNEQ (optarg, "common-page-size="))
2258 {
2259 char *end;
2260 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2261 if (*end
2262 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2263 einfo (_("%P%F: invalid common page size \`%s'\n"),
2264 optarg + 17);
2265 }
2266 else if (CONST_STRNEQ (optarg, "stack-size="))
2267 {
2268 char *end;
2269 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2270 if (*end || link_info.stacksize < 0)
2271 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2272 if (!link_info.stacksize)
2273 /* Use -1 for explicit no-stack, because zero means
2274 'default'. */
2275 link_info.stacksize = -1;
2276 }
2277 else if (strcmp (optarg, "execstack") == 0)
2278 {
2279 link_info.execstack = TRUE;
2280 link_info.noexecstack = FALSE;
2281 }
2282 else if (strcmp (optarg, "noexecstack") == 0)
2283 {
2284 link_info.noexecstack = TRUE;
2285 link_info.execstack = FALSE;
2286 }
2287 EOF
2288
2289 if test x"$BNDPLT" = xyes; then
2290 fragment <<EOF
2291 else if (strcmp (optarg, "bndplt") == 0)
2292 link_info.bndplt = TRUE;
2293 EOF
2294 fi
2295
2296 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2297 fragment <<EOF
2298 else if (strcmp (optarg, "global") == 0)
2299 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2300 else if (strcmp (optarg, "initfirst") == 0)
2301 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2302 else if (strcmp (optarg, "interpose") == 0)
2303 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2304 else if (strcmp (optarg, "loadfltr") == 0)
2305 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2306 else if (strcmp (optarg, "nodefaultlib") == 0)
2307 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2308 else if (strcmp (optarg, "nodelete") == 0)
2309 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2310 else if (strcmp (optarg, "nodlopen") == 0)
2311 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2312 else if (strcmp (optarg, "nodump") == 0)
2313 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2314 else if (strcmp (optarg, "now") == 0)
2315 {
2316 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2317 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2318 }
2319 else if (strcmp (optarg, "lazy") == 0)
2320 {
2321 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2322 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2323 }
2324 else if (strcmp (optarg, "origin") == 0)
2325 {
2326 link_info.flags |= (bfd_vma) DF_ORIGIN;
2327 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2328 }
2329 else if (strcmp (optarg, "combreloc") == 0)
2330 link_info.combreloc = TRUE;
2331 else if (strcmp (optarg, "nocombreloc") == 0)
2332 link_info.combreloc = FALSE;
2333 else if (strcmp (optarg, "nocopyreloc") == 0)
2334 link_info.nocopyreloc = TRUE;
2335 else if (strcmp (optarg, "relro") == 0)
2336 link_info.relro = TRUE;
2337 else if (strcmp (optarg, "norelro") == 0)
2338 link_info.relro = FALSE;
2339 else if (strcmp (optarg, "text") == 0)
2340 link_info.error_textrel = TRUE;
2341 else if (strcmp (optarg, "notext") == 0)
2342 link_info.error_textrel = FALSE;
2343 else if (strcmp (optarg, "textoff") == 0)
2344 link_info.error_textrel = FALSE;
2345 EOF
2346 fi
2347
2348 fragment <<EOF
2349 else
2350 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2351 break;
2352 EOF
2353
2354 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2355 fragment <<EOF
2356 $PARSE_AND_LIST_ARGS_CASES
2357 EOF
2358 fi
2359
2360 fragment <<EOF
2361 }
2362
2363 return TRUE;
2364 }
2365
2366 EOF
2367
2368 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2369 fragment <<EOF
2370
2371 static void
2372 gld${EMULATION_NAME}_list_options (FILE * file)
2373 {
2374 EOF
2375 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2376 fragment <<EOF
2377 fprintf (file, _("\
2378 --audit=AUDITLIB Specify a library to use for auditing\n"));
2379 fprintf (file, _("\
2380 -Bgroup Selects group name lookup rules for DSO\n"));
2381 EOF
2382 fi
2383 fragment <<EOF
2384 fprintf (file, _("\
2385 --build-id[=STYLE] Generate build ID note\n"));
2386 EOF
2387 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2388 fragment <<EOF
2389 fprintf (file, _("\
2390 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2391 Specify a library to use for auditing dependencies\n"));
2392 fprintf (file, _("\
2393 --disable-new-dtags Disable new dynamic tags\n"));
2394 fprintf (file, _("\
2395 --enable-new-dtags Enable new dynamic tags\n"));
2396 fprintf (file, _("\
2397 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2398 fprintf (file, _("\
2399 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2400 fprintf (file, _("\
2401 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2402 fprintf (file, _("\
2403 -z combreloc Merge dynamic relocs into one section and sort\n"));
2404 EOF
2405 fi
2406
2407 fragment <<EOF
2408 fprintf (file, _("\
2409 -z common-page-size=SIZE Set common page size to SIZE\n"));
2410 fprintf (file, _("\
2411 -z defs Report unresolved symbols in object files.\n"));
2412 fprintf (file, _("\
2413 -z execstack Mark executable as requiring executable stack\n"));
2414 EOF
2415
2416 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2417 fragment <<EOF
2418 fprintf (file, _("\
2419 -z global Make symbols in DSO available for subsequently\n\
2420 loaded objects\n"));
2421 fprintf (file, _("\
2422 -z initfirst Mark DSO to be initialized first at runtime\n"));
2423 fprintf (file, _("\
2424 -z interpose Mark object to interpose all DSOs but executable\n"));
2425 fprintf (file, _("\
2426 -z lazy Mark object lazy runtime binding (default)\n"));
2427 fprintf (file, _("\
2428 -z loadfltr Mark object requiring immediate process\n"));
2429 EOF
2430 fi
2431
2432 fragment <<EOF
2433 fprintf (file, _("\
2434 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2435 fprintf (file, _("\
2436 -z muldefs Allow multiple definitions\n"));
2437 EOF
2438
2439 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2440 fragment <<EOF
2441 fprintf (file, _("\
2442 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2443 fprintf (file, _("\
2444 -z nocopyreloc Don't create copy relocs\n"));
2445 fprintf (file, _("\
2446 -z nodefaultlib Mark object not to use default search paths\n"));
2447 fprintf (file, _("\
2448 -z nodelete Mark DSO non-deletable at runtime\n"));
2449 fprintf (file, _("\
2450 -z nodlopen Mark DSO not available to dlopen\n"));
2451 fprintf (file, _("\
2452 -z nodump Mark DSO not available to dldump\n"));
2453 EOF
2454 fi
2455 fragment <<EOF
2456 fprintf (file, _("\
2457 -z noexecstack Mark executable as not requiring executable stack\n"));
2458 EOF
2459 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2460 fragment <<EOF
2461 fprintf (file, _("\
2462 -z text Treat DT_TEXTREL in shared object as error\n"));
2463 fprintf (file, _("\
2464 -z notext Don't treat DT_TEXTREL in shared object as error\n"));
2465 fprintf (file, _("\
2466 -z textoff Don't treat DT_TEXTREL in shared object as error\n"));
2467 fprintf (file, _("\
2468 -z norelro Don't create RELRO program header\n"));
2469 fprintf (file, _("\
2470 -z now Mark object non-lazy runtime binding\n"));
2471 fprintf (file, _("\
2472 -z origin Mark object requiring immediate \$ORIGIN\n\
2473 processing at runtime\n"));
2474 fprintf (file, _("\
2475 -z relro Create RELRO program header\n"));
2476 fprintf (file, _("\
2477 -z stacksize=SIZE Set size of stack segment\n"));
2478 EOF
2479 fi
2480
2481 if test x"$BNDPLT" = xyes; then
2482 fragment <<EOF
2483 fprintf (file, _("\
2484 -z bndplt Always generate BND prefix in PLT entries\n"));
2485 EOF
2486 fi
2487
2488 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2489 fragment <<EOF
2490 $PARSE_AND_LIST_OPTIONS
2491 EOF
2492 fi
2493
2494 fragment <<EOF
2495 }
2496 EOF
2497
2498 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2499 fragment <<EOF
2500 $PARSE_AND_LIST_EPILOGUE
2501 EOF
2502 fi
2503 fi
2504
2505 fragment <<EOF
2506
2507 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2508 {
2509 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2510 ${LDEMUL_SYSLIB-syslib_default},
2511 ${LDEMUL_HLL-hll_default},
2512 ${LDEMUL_AFTER_PARSE-after_parse_default},
2513 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2514 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2515 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2516 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2517 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2518 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2519 "${EMULATION_NAME}",
2520 "${OUTPUT_FORMAT}",
2521 ${LDEMUL_FINISH-finish_default},
2522 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2523 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2524 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2525 ${LDEMUL_SET_SYMBOLS-NULL},
2526 ${LDEMUL_PARSE_ARGS-NULL},
2527 gld${EMULATION_NAME}_add_options,
2528 gld${EMULATION_NAME}_handle_option,
2529 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2530 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2531 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2532 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2533 ${LDEMUL_NEW_VERS_PATTERN-NULL},
2534 ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL}
2535 };
2536 EOF