ld: Enable using separate linker script for -z relro
[deliverable/binutils-gdb.git] / ld / emultempl / elf32.em
1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 # This file is now misnamed, because it supports both 32 bit and 64 bit
4 # ELF emulations.
5 test -z "${ELFSIZE}" && ELFSIZE=32
6 if [ -z "$MACHINE" ]; then
7 OUTPUT_ARCH=${ARCH}
8 else
9 OUTPUT_ARCH=${ARCH}:${MACHINE}
10 fi
11 fragment <<EOF
12 /* This file is is generated by a shell script. DO NOT EDIT! */
13
14 /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
15 Copyright (C) 1991-2018 Free Software Foundation, Inc.
16 Written by Steve Chamberlain <sac@cygnus.com>
17 ELF support by Ian Lance Taylor <ian@cygnus.com>
18
19 This file is part of the GNU Binutils.
20
21 This program is free software; you can redistribute it and/or modify
22 it under the terms of the GNU General Public License as published by
23 the Free Software Foundation; either version 3 of the License, or
24 (at your option) any later version.
25
26 This program is distributed in the hope that it will be useful,
27 but WITHOUT ANY WARRANTY; without even the implied warranty of
28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 GNU General Public License for more details.
30
31 You should have received a copy of the GNU General Public License
32 along with this program; if not, write to the Free Software
33 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
34 MA 02110-1301, USA. */
35
36 #define TARGET_IS_${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_parse (void);
64 static void gld${EMULATION_NAME}_after_open (void);
65 static void gld${EMULATION_NAME}_before_allocation (void);
66 static void gld${EMULATION_NAME}_after_allocation (void);
67 static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan
68 (asection *, const char *, int);
69 EOF
70
71 if [ "x${USE_LIBPATH}" = xyes ] ; then
72 case ${target} in
73 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
74 fragment <<EOF
75 #ifdef HAVE_GLOB
76 #include <glob.h>
77 #endif
78 EOF
79 ;;
80 esac
81 fi
82
83 # Import any needed special functions and/or overrides.
84 #
85 source_em ${srcdir}/emultempl/elf-generic.em
86 if test -n "$EXTRA_EM_FILE" ; then
87 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
88 fi
89
90 # Functions in this file can be overridden by setting the LDEMUL_* shell
91 # variables. If the name of the overriding function is the same as is
92 # defined in this file, then don't output this file's version.
93 # If a different overriding name is given then output the standard function
94 # as presumably it is called from the overriding function.
95 #
96 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
97 fragment <<EOF
98
99 static void
100 gld${EMULATION_NAME}_before_parse (void)
101 {
102 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
103 input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
104 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
105 config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
106 `if test -n "$CALL_NOP_BYTE" ; then echo link_info.call_nop_byte = $CALL_NOP_BYTE; fi`;
107 link_info.check_relocs_after_open_input = TRUE;
108 link_info.relro = DEFAULT_LD_Z_RELRO;
109 link_info.separate_code = DEFAULT_LD_Z_SEPARATE_CODE;
110 }
111
112 EOF
113 fi
114
115 if test x"$LDEMUL_AFTER_PARSE" != xgld"$EMULATION_NAME"_after_parse; then
116 fragment <<EOF
117
118 static void
119 gld${EMULATION_NAME}_after_parse (void)
120 {
121 if (bfd_link_pie (&link_info))
122 link_info.flags_1 |= (bfd_vma) DF_1_PIE;
123
124 if (bfd_link_executable (&link_info)
125 && link_info.nointerp)
126 {
127 if (link_info.dynamic_undefined_weak > 0)
128 einfo (_("%P: warning: -z dynamic-undefined-weak ignored\n"));
129 link_info.dynamic_undefined_weak = 0;
130 }
131 after_parse_default ();
132 }
133
134 EOF
135 fi
136
137 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
138 fragment <<EOF
139 /* Handle the generation of DT_NEEDED tags. */
140
141 static bfd_boolean
142 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
143 {
144 int link_class = 0;
145
146 /* Tell the ELF linker that we don't want the output file to have a
147 DT_NEEDED entry for this file, unless it is used to resolve
148 references in a regular object. */
149 if (entry->flags.add_DT_NEEDED_for_regular)
150 link_class = DYN_AS_NEEDED;
151
152 /* Tell the ELF linker that we don't want the output file to have a
153 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
154 this file at all. */
155 if (!entry->flags.add_DT_NEEDED_for_dynamic)
156 link_class |= DYN_NO_ADD_NEEDED;
157
158 if (entry->flags.just_syms
159 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
160 einfo (_("%F%P: %pB: --just-symbols may not be used on DSO\n"),
161 entry->the_bfd);
162
163 if (link_class == 0
164 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
165 return FALSE;
166
167 bfd_elf_set_dyn_lib_class (entry->the_bfd,
168 (enum dynamic_lib_link_class) link_class);
169
170 /* Continue on with normal load_symbols processing. */
171 return FALSE;
172 }
173 EOF
174 fi
175
176 fragment <<EOF
177
178 /* These variables are required to pass information back and forth
179 between after_open and check_needed and stat_needed and vercheck. */
180
181 static struct bfd_link_needed_list *global_needed;
182 static struct stat global_stat;
183 static lang_input_statement_type *global_found;
184 static struct bfd_link_needed_list *global_vercheck_needed;
185 static bfd_boolean global_vercheck_failed;
186
187 /* These variables are used to implement target options */
188
189 static char *audit; /* colon (typically) separated list of libs */
190 static char *depaudit; /* colon (typically) separated list of libs */
191
192 /* Style of .note.gnu.build-id section. */
193 static const char *emit_note_gnu_build_id;
194
195 /* On Linux, it's possible to have different versions of the same
196 shared library linked against different versions of libc. The
197 dynamic linker somehow tags which libc version to use in
198 /etc/ld.so.cache, and, based on the libc that it sees in the
199 executable, chooses which version of the shared library to use.
200
201 We try to do a similar check here by checking whether this shared
202 library needs any other shared libraries which may conflict with
203 libraries we have already included in the link. If it does, we
204 skip it, and try to find another shared library farther on down the
205 link path.
206
207 This is called via lang_for_each_input_file.
208 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
209 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
210 a conflicting version. */
211
212 static void
213 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
214 {
215 const char *soname;
216 struct bfd_link_needed_list *l;
217
218 if (global_vercheck_failed)
219 return;
220 if (s->the_bfd == NULL
221 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
222 return;
223
224 soname = bfd_elf_get_dt_soname (s->the_bfd);
225 if (soname == NULL)
226 soname = lbasename (bfd_get_filename (s->the_bfd));
227
228 for (l = global_vercheck_needed; l != NULL; l = l->next)
229 {
230 const char *suffix;
231
232 if (filename_cmp (soname, l->name) == 0)
233 {
234 /* Probably can't happen, but it's an easy check. */
235 continue;
236 }
237
238 if (strchr (l->name, '/') != NULL)
239 continue;
240
241 suffix = strstr (l->name, ".so.");
242 if (suffix == NULL)
243 continue;
244
245 suffix += sizeof ".so." - 1;
246
247 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
248 {
249 /* Here we know that S is a dynamic object FOO.SO.VER1, and
250 the object we are considering needs a dynamic object
251 FOO.SO.VER2, and VER1 and VER2 are different. This
252 appears to be a version mismatch, so we tell the caller
253 to try a different version of this library. */
254 global_vercheck_failed = TRUE;
255 return;
256 }
257 }
258 }
259
260
261 /* See if an input file matches a DT_NEEDED entry by running stat on
262 the file. */
263
264 static void
265 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
266 {
267 struct stat st;
268 const char *suffix;
269 const char *soname;
270
271 if (global_found != NULL)
272 return;
273 if (s->the_bfd == NULL)
274 return;
275
276 /* If this input file was an as-needed entry, and wasn't found to be
277 needed at the stage it was linked, then don't say we have loaded it. */
278 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
279 return;
280
281 if (bfd_stat (s->the_bfd, &st) != 0)
282 {
283 einfo (_("%P: %pB: bfd_stat failed: %E\n"), s->the_bfd);
284 return;
285 }
286
287 /* Some operating systems, e.g. Windows, do not provide a meaningful
288 st_ino; they always set it to zero. (Windows does provide a
289 meaningful st_dev.) Do not indicate a duplicate library in that
290 case. While there is no guarantee that a system that provides
291 meaningful inode numbers will never set st_ino to zero, this is
292 merely an optimization, so we do not need to worry about false
293 negatives. */
294 if (st.st_dev == global_stat.st_dev
295 && st.st_ino == global_stat.st_ino
296 && st.st_ino != 0)
297 {
298 global_found = s;
299 return;
300 }
301
302 /* We issue a warning if it looks like we are including two
303 different versions of the same shared library. For example,
304 there may be a problem if -lc picks up libc.so.6 but some other
305 shared library has a DT_NEEDED entry of libc.so.5. This is a
306 heuristic test, and it will only work if the name looks like
307 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
308 If we really want to issue warnings about mixing version numbers
309 of shared libraries, we need to find a better way. */
310
311 if (strchr (global_needed->name, '/') != NULL)
312 return;
313 suffix = strstr (global_needed->name, ".so.");
314 if (suffix == NULL)
315 return;
316 suffix += sizeof ".so." - 1;
317
318 soname = bfd_elf_get_dt_soname (s->the_bfd);
319 if (soname == NULL)
320 soname = lbasename (s->filename);
321
322 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
323 einfo (_("%P: warning: %s, needed by %pB, may conflict with %s\n"),
324 global_needed->name, global_needed->by, soname);
325 }
326
327 struct dt_needed
328 {
329 bfd *by;
330 const char *name;
331 };
332
333 /* This function is called for each possible name for a dynamic object
334 named by a DT_NEEDED entry. The FORCE parameter indicates whether
335 to skip the check for a conflicting version. */
336
337 static bfd_boolean
338 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
339 int force)
340 {
341 bfd *abfd;
342 const char *name = needed->name;
343 const char *soname;
344 int link_class;
345
346 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
347 if (abfd == NULL)
348 {
349 if (verbose)
350 info_msg (_("attempt to open %s failed\n"), name);
351 return FALSE;
352 }
353
354 /* Linker needs to decompress sections. */
355 abfd->flags |= BFD_DECOMPRESS;
356
357 if (! bfd_check_format (abfd, bfd_object))
358 {
359 bfd_close (abfd);
360 return FALSE;
361 }
362 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
363 {
364 bfd_close (abfd);
365 return FALSE;
366 }
367
368 /* For DT_NEEDED, they have to match. */
369 if (abfd->xvec != link_info.output_bfd->xvec)
370 {
371 bfd_close (abfd);
372 return FALSE;
373 }
374
375 /* Check whether this object would include any conflicting library
376 versions. If FORCE is set, then we skip this check; we use this
377 the second time around, if we couldn't find any compatible
378 instance of the shared library. */
379
380 if (! force)
381 {
382 struct bfd_link_needed_list *needs;
383
384 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
385 einfo (_("%F%P: %pB: bfd_elf_get_bfd_needed_list failed: %E\n"), abfd);
386
387 if (needs != NULL)
388 {
389 global_vercheck_needed = needs;
390 global_vercheck_failed = FALSE;
391 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
392 if (global_vercheck_failed)
393 {
394 bfd_close (abfd);
395 /* Return FALSE to force the caller to move on to try
396 another file on the search path. */
397 return FALSE;
398 }
399
400 /* But wait! It gets much worse. On Linux, if a shared
401 library does not use libc at all, we are supposed to skip
402 it the first time around in case we encounter a shared
403 library later on with the same name which does use the
404 version of libc that we want. This is much too horrible
405 to use on any system other than Linux. */
406
407 EOF
408 case ${target} in
409 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
410 fragment <<EOF
411 {
412 struct bfd_link_needed_list *l;
413
414 for (l = needs; l != NULL; l = l->next)
415 if (CONST_STRNEQ (l->name, "libc.so"))
416 break;
417 if (l == NULL)
418 {
419 bfd_close (abfd);
420 return FALSE;
421 }
422 }
423
424 EOF
425 ;;
426 esac
427 fragment <<EOF
428 }
429 }
430
431 /* We've found a dynamic object matching the DT_NEEDED entry. */
432
433 /* We have already checked that there is no other input file of the
434 same name. We must now check again that we are not including the
435 same file twice. We need to do this because on many systems
436 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
437 reference libc.so.1. If we have already included libc.so, we
438 don't want to include libc.so.1 if they are the same file, and we
439 can only check that using stat. */
440
441 if (bfd_stat (abfd, &global_stat) != 0)
442 einfo (_("%F%P: %pB: bfd_stat failed: %E\n"), abfd);
443
444 /* First strip off everything before the last '/'. */
445 soname = lbasename (abfd->filename);
446
447 if (verbose)
448 info_msg (_("found %s at %s\n"), soname, name);
449
450 global_found = NULL;
451 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
452 if (global_found != NULL)
453 {
454 /* Return TRUE to indicate that we found the file, even though
455 we aren't going to do anything with it. */
456 return TRUE;
457 }
458
459 /* Specify the soname to use. */
460 bfd_elf_set_dt_needed_name (abfd, soname);
461
462 /* Tell the ELF linker that we don't want the output file to have a
463 DT_NEEDED entry for this file, unless it is used to resolve
464 references in a regular object. */
465 link_class = DYN_DT_NEEDED;
466
467 /* Tell the ELF linker that we don't want the output file to have a
468 DT_NEEDED entry for this file at all if the entry is from a file
469 with DYN_NO_ADD_NEEDED. */
470 if (needed->by != NULL
471 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
472 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
473
474 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
475
476 /* Add this file into the symbol table. */
477 if (! bfd_link_add_symbols (abfd, &link_info))
478 einfo (_("%F%P: %pB: error adding symbols: %E\n"), abfd);
479
480 return TRUE;
481 }
482
483 /* Search for a needed file in a path. */
484
485 static bfd_boolean
486 gld${EMULATION_NAME}_search_needed (const char *path,
487 struct dt_needed *n, int force)
488 {
489 const char *s;
490 const char *name = n->name;
491 size_t len;
492 struct dt_needed needed;
493
494 if (name[0] == '/')
495 return gld${EMULATION_NAME}_try_needed (n, force);
496
497 if (path == NULL || *path == '\0')
498 return FALSE;
499
500 needed.by = n->by;
501 needed.name = n->name;
502
503 len = strlen (name);
504 while (1)
505 {
506 unsigned offset = 0;
507 char * var;
508 char *filename, *sset;
509
510 s = strchr (path, config.rpath_separator);
511 if (s == NULL)
512 s = path + strlen (path);
513
514 #if HAVE_DOS_BASED_FILE_SYSTEM
515 /* Assume a match on the second char is part of drive specifier. */
516 else if (config.rpath_separator == ':'
517 && s == path + 1
518 && ISALPHA (*path))
519 {
520 s = strchr (s + 1, config.rpath_separator);
521 if (s == NULL)
522 s = path + strlen (path);
523 }
524 #endif
525 filename = (char *) xmalloc (s - path + len + 2);
526 if (s == path)
527 sset = filename;
528 else
529 {
530 memcpy (filename, path, s - path);
531 filename[s - path] = '/';
532 sset = filename + (s - path) + 1;
533 }
534 strcpy (sset, name);
535
536 /* PR 20535: Support the same pseudo-environment variables that
537 are supported by ld.so. Namely, $ORIGIN, $LIB and $PLATFORM.
538 Since there can be more than one occurrence of these tokens in
539 the path we loop until no more are found. Since we might not
540 be able to substitute some of the tokens we maintain an offset
541 into the filename for where we should begin our scan. */
542 while ((var = strchr (filename + offset, '$')) != NULL)
543 {
544 /* The ld.so manual page does not say, but I am going to assume that
545 these tokens are terminated by a directory separator character
546 (/) or the end of the string. There is also an implication that
547 $ORIGIN should only be used at the start of a path, but that is
548 not enforced here.
549
550 The ld.so manual page also states that it allows ${ORIGIN},
551 ${LIB} and ${PLATFORM}, so these are supported as well.
552
553 FIXME: The code could be a lot cleverer about allocating space
554 for the processed string. */
555 char * end = strchr (var, '/');
556 char * replacement = NULL;
557 char * v = var + 1;
558 char * freeme = NULL;
559 unsigned flen = strlen (filename);
560
561 if (end != NULL)
562 /* Temporarily terminate the filename at the end of the token. */
563 * end = 0;
564
565 if (*v == '{')
566 ++ v;
567 switch (*v++)
568 {
569 case 'O':
570 if (strcmp (v, "RIGIN") == 0 || strcmp (v, "RIGIN}") == 0)
571 {
572 /* ORIGIN - replace with the full path to the directory
573 containing the program or shared object. */
574 if (needed.by == NULL)
575 {
576 if (link_info.output_bfd == NULL)
577 {
578 break;
579 }
580 else
581 replacement = bfd_get_filename (link_info.output_bfd);
582 }
583 else
584 replacement = bfd_get_filename (needed.by);
585
586 if (replacement)
587 {
588 char * slash;
589
590 if (replacement[0] == '/')
591 freeme = xstrdup (replacement);
592 else
593 {
594 char * current_dir = getpwd ();
595
596 freeme = xmalloc (strlen (replacement) + strlen (current_dir) + 2);
597 sprintf (freeme, "%s/%s", current_dir, replacement);
598 }
599
600 replacement = freeme;
601 if ((slash = strrchr (replacement, '/')) != NULL)
602 * slash = 0;
603 }
604 }
605 break;
606
607 case 'L':
608 if (strcmp (v, "IB") == 0 || strcmp (v, "IB}") == 0)
609 {
610 /* LIB - replace with "lib" in 32-bit environments
611 and "lib64" in 64-bit environments. */
612
613 /* Note - we could replace this switch statement by
614 conditional fragments of shell script, but that is messy.
615 Any compiler worth its salt is going to optimize away
616 all but one of these case statements anyway. */
617 switch ($ELFSIZE)
618 {
619 case 32: replacement = "lib"; break;
620 case 64: replacement = "lib64"; break;
621 default:
622 /* $ELFSIZE is not 32 or 64 ... */
623 abort ();
624 }
625 }
626 break;
627
628 case 'P':
629 /* Supporting $PLATFORM in a cross-hosted environment is not
630 possible. Supporting it in a native environment involves
631 loading the <sys/auxv.h> header file which loads the
632 system <elf.h> header file, which conflicts with the
633 "include/elf/mips.h" header file. */
634 /* Fall through. */
635 default:
636 break;
637 }
638
639 if (replacement)
640 {
641 char * filename2 = xmalloc (flen + strlen (replacement));
642
643 if (end)
644 {
645 sprintf (filename2, "%.*s%s/%s",
646 (int)(var - filename), filename,
647 replacement, end + 1);
648 offset = (var - filename) + 1 + strlen (replacement);
649 }
650 else
651 {
652 sprintf (filename2, "%.*s%s",
653 (int)(var - filename), filename,
654 replacement);
655 offset = var - filename + strlen (replacement);
656 }
657
658 free (filename);
659 filename = filename2;
660 /* There is no need to restore the path separator (when
661 end != NULL) as we have replaced the entire string. */
662 }
663 else
664 {
665 if (verbose)
666 /* We only issue an "unrecognised" message in verbose mode
667 as the $<foo> token might be a legitimate component of
668 a path name in the target's file system. */
669 info_msg (_("unrecognised or unsupported token '%s' in search path\n"), var);
670
671 if (end)
672 /* Restore the path separator. */
673 * end = '/';
674
675 /* PR 20784: Make sure that we resume the scan *after*
676 the token that we could not replace. */
677 offset = (var + 1) - filename;
678 }
679
680 free (freeme);
681 }
682
683 needed.name = filename;
684
685 if (gld${EMULATION_NAME}_try_needed (&needed, force))
686 return TRUE;
687
688 free (filename);
689
690 if (*s == '\0')
691 break;
692 path = s + 1;
693 }
694
695 return FALSE;
696 }
697
698 EOF
699 if [ "x${USE_LIBPATH}" = xyes ] ; then
700 fragment <<EOF
701
702 /* Prefix the sysroot to absolute paths in PATH, a string containing
703 paths separated by config.rpath_separator. If running on a DOS
704 file system, paths containing a drive spec won't have the sysroot
705 prefix added, unless the sysroot also specifies the same drive. */
706
707 static const char *
708 gld${EMULATION_NAME}_add_sysroot (const char *path)
709 {
710 size_t len, extra;
711 const char *p;
712 char *ret, *q;
713 int dos_drive_sysroot = HAS_DRIVE_SPEC (ld_sysroot);
714
715 len = strlen (ld_sysroot);
716 for (extra = 0, p = path; ; )
717 {
718 int dos_drive = HAS_DRIVE_SPEC (p);
719
720 if (dos_drive)
721 p += 2;
722 if (IS_DIR_SEPARATOR (*p)
723 && (!dos_drive
724 || (dos_drive_sysroot
725 && ld_sysroot[0] == p[-2])))
726 {
727 if (dos_drive && dos_drive_sysroot)
728 extra += len - 2;
729 else
730 extra += len;
731 }
732 p = strchr (p, config.rpath_separator);
733 if (!p)
734 break;
735 ++p;
736 }
737
738 ret = xmalloc (strlen (path) + extra + 1);
739
740 for (q = ret, p = path; ; )
741 {
742 const char *end;
743 int dos_drive = HAS_DRIVE_SPEC (p);
744
745 if (dos_drive)
746 {
747 *q++ = *p++;
748 *q++ = *p++;
749 }
750 if (IS_DIR_SEPARATOR (*p)
751 && (!dos_drive
752 || (dos_drive_sysroot
753 && ld_sysroot[0] == p[-2])))
754 {
755 if (dos_drive && dos_drive_sysroot)
756 {
757 strcpy (q, ld_sysroot + 2);
758 q += len - 2;
759 }
760 else
761 {
762 strcpy (q, ld_sysroot);
763 q += len;
764 }
765 }
766 end = strchr (p, config.rpath_separator);
767 if (end)
768 {
769 size_t n = end - p + 1;
770 strncpy (q, p, n);
771 q += n;
772 p += n;
773 }
774 else
775 {
776 strcpy (q, p);
777 break;
778 }
779 }
780
781 return ret;
782 }
783
784 EOF
785 case ${target} in
786 *-*-freebsd* | *-*-dragonfly*)
787 fragment <<EOF
788 /* Read the system search path the FreeBSD way rather than the Linux way. */
789 #ifdef HAVE_ELF_HINTS_H
790 #include <elf-hints.h>
791 #else
792 #include "elf-hints-local.h"
793 #endif
794
795 static bfd_boolean
796 gld${EMULATION_NAME}_check_ld_elf_hints (const struct bfd_link_needed_list *l,
797 int force)
798 {
799 static bfd_boolean initialized;
800 static const char *ld_elf_hints;
801 struct dt_needed needed;
802
803 if (!initialized)
804 {
805 FILE *f;
806 char *tmppath;
807
808 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
809 f = fopen (tmppath, FOPEN_RB);
810 free (tmppath);
811 if (f != NULL)
812 {
813 struct elfhints_hdr hdr;
814
815 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
816 && hdr.magic == ELFHINTS_MAGIC
817 && hdr.version == 1)
818 {
819 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
820 {
821 char *b;
822
823 b = xmalloc (hdr.dirlistlen + 1);
824 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
825 hdr.dirlistlen + 1)
826 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
827
828 free (b);
829 }
830 }
831 fclose (f);
832 }
833
834 initialized = TRUE;
835 }
836
837 if (ld_elf_hints == NULL)
838 return FALSE;
839
840 needed.by = l->by;
841 needed.name = l->name;
842 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, &needed, force);
843 }
844 EOF
845 # FreeBSD
846 ;;
847
848 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
849 fragment <<EOF
850 /* For a native linker, check the file /etc/ld.so.conf for directories
851 in which we may find shared libraries. /etc/ld.so.conf is really
852 only meaningful on Linux. */
853
854 struct gld${EMULATION_NAME}_ld_so_conf
855 {
856 char *path;
857 size_t len, alloc;
858 };
859
860 static bfd_boolean
861 gld${EMULATION_NAME}_parse_ld_so_conf
862 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
863
864 static void
865 gld${EMULATION_NAME}_parse_ld_so_conf_include
866 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
867 const char *pattern)
868 {
869 char *newp = NULL;
870 #ifdef HAVE_GLOB
871 glob_t gl;
872 #endif
873
874 if (pattern[0] != '/')
875 {
876 char *p = strrchr (filename, '/');
877 size_t patlen = strlen (pattern) + 1;
878
879 newp = xmalloc (p - filename + 1 + patlen);
880 memcpy (newp, filename, p - filename + 1);
881 memcpy (newp + (p - filename + 1), pattern, patlen);
882 pattern = newp;
883 }
884
885 #ifdef HAVE_GLOB
886 if (glob (pattern, 0, NULL, &gl) == 0)
887 {
888 size_t i;
889
890 for (i = 0; i < gl.gl_pathc; ++i)
891 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
892 globfree (&gl);
893 }
894 #else
895 /* If we do not have glob, treat the pattern as a literal filename. */
896 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
897 #endif
898
899 if (newp)
900 free (newp);
901 }
902
903 static bfd_boolean
904 gld${EMULATION_NAME}_parse_ld_so_conf
905 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
906 {
907 FILE *f = fopen (filename, FOPEN_RT);
908 char *line;
909 size_t linelen;
910
911 if (f == NULL)
912 return FALSE;
913
914 linelen = 256;
915 line = xmalloc (linelen);
916 do
917 {
918 char *p = line, *q;
919
920 /* Normally this would use getline(3), but we need to be portable. */
921 while ((q = fgets (p, linelen - (p - line), f)) != NULL
922 && strlen (q) == linelen - (p - line) - 1
923 && line[linelen - 2] != '\n')
924 {
925 line = xrealloc (line, 2 * linelen);
926 p = line + linelen - 1;
927 linelen += linelen;
928 }
929
930 if (q == NULL && p == line)
931 break;
932
933 p = strchr (line, '\n');
934 if (p)
935 *p = '\0';
936
937 /* Because the file format does not know any form of quoting we
938 can search forward for the next '#' character and if found
939 make it terminating the line. */
940 p = strchr (line, '#');
941 if (p)
942 *p = '\0';
943
944 /* Remove leading whitespace. NUL is no whitespace character. */
945 p = line;
946 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
947 ++p;
948
949 /* If the line is blank it is ignored. */
950 if (p[0] == '\0')
951 continue;
952
953 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
954 {
955 char *dir, c;
956 p += 8;
957 do
958 {
959 while (*p == ' ' || *p == '\t')
960 ++p;
961
962 if (*p == '\0')
963 break;
964
965 dir = p;
966
967 while (*p != ' ' && *p != '\t' && *p)
968 ++p;
969
970 c = *p;
971 *p++ = '\0';
972 if (dir[0] != '\0')
973 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
974 dir);
975 }
976 while (c != '\0');
977 }
978 else
979 {
980 char *dir = p;
981 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
982 && *p != '\r' && *p != '\v')
983 ++p;
984
985 while (p != dir && p[-1] == '/')
986 --p;
987 if (info->path == NULL)
988 {
989 info->alloc = p - dir + 1 + 256;
990 info->path = xmalloc (info->alloc);
991 info->len = 0;
992 }
993 else
994 {
995 if (info->len + 1 + (p - dir) >= info->alloc)
996 {
997 info->alloc += p - dir + 256;
998 info->path = xrealloc (info->path, info->alloc);
999 }
1000 info->path[info->len++] = config.rpath_separator;
1001 }
1002 memcpy (info->path + info->len, dir, p - dir);
1003 info->len += p - dir;
1004 info->path[info->len] = '\0';
1005 }
1006 }
1007 while (! feof (f));
1008 free (line);
1009 fclose (f);
1010 return TRUE;
1011 }
1012
1013 static bfd_boolean
1014 gld${EMULATION_NAME}_check_ld_so_conf (const struct bfd_link_needed_list *l,
1015 int force)
1016 {
1017 static bfd_boolean initialized;
1018 static const char *ld_so_conf;
1019 struct dt_needed needed;
1020
1021 if (! initialized)
1022 {
1023 char *tmppath;
1024 struct gld${EMULATION_NAME}_ld_so_conf info;
1025
1026 info.path = NULL;
1027 info.len = info.alloc = 0;
1028 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
1029 (const char *) NULL);
1030 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
1031 {
1032 free (tmppath);
1033 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
1034 (const char *) NULL);
1035 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
1036 }
1037 free (tmppath);
1038
1039 if (info.path)
1040 {
1041 ld_so_conf = gld${EMULATION_NAME}_add_sysroot (info.path);
1042 free (info.path);
1043 }
1044 initialized = TRUE;
1045 }
1046
1047 if (ld_so_conf == NULL)
1048 return FALSE;
1049
1050
1051 needed.by = l->by;
1052 needed.name = l->name;
1053 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
1054 }
1055
1056 EOF
1057 # Linux
1058 ;;
1059 esac
1060 fi
1061 fragment <<EOF
1062
1063 /* See if an input file matches a DT_NEEDED entry by name. */
1064
1065 static void
1066 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
1067 {
1068 const char *soname;
1069
1070 /* Stop looking if we've found a loaded lib. */
1071 if (global_found != NULL
1072 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1073 & DYN_AS_NEEDED) == 0)
1074 return;
1075
1076 if (s->filename == NULL || s->the_bfd == NULL)
1077 return;
1078
1079 /* Don't look for a second non-loaded as-needed lib. */
1080 if (global_found != NULL
1081 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
1082 return;
1083
1084 if (filename_cmp (s->filename, global_needed->name) == 0)
1085 {
1086 global_found = s;
1087 return;
1088 }
1089
1090 if (s->flags.search_dirs)
1091 {
1092 const char *f = strrchr (s->filename, '/');
1093 if (f != NULL
1094 && filename_cmp (f + 1, global_needed->name) == 0)
1095 {
1096 global_found = s;
1097 return;
1098 }
1099 }
1100
1101 soname = bfd_elf_get_dt_soname (s->the_bfd);
1102 if (soname != NULL
1103 && filename_cmp (soname, global_needed->name) == 0)
1104 {
1105 global_found = s;
1106 return;
1107 }
1108 }
1109
1110 EOF
1111
1112 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
1113 fragment <<EOF
1114
1115 static bfd_size_type
1116 id_note_section_size (bfd *abfd ATTRIBUTE_UNUSED)
1117 {
1118 const char *style = emit_note_gnu_build_id;
1119 bfd_size_type size;
1120 bfd_size_type build_id_size;
1121
1122 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
1123 size = (size + 3) & -(bfd_size_type) 4;
1124
1125 build_id_size = compute_build_id_size (style);
1126 if (build_id_size)
1127 size += build_id_size;
1128 else
1129 size = 0;
1130
1131 return size;
1132 }
1133
1134 static bfd_boolean
1135 write_build_id (bfd *abfd)
1136 {
1137 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1138 struct elf_obj_tdata *t = elf_tdata (abfd);
1139 const char *style;
1140 asection *asec;
1141 Elf_Internal_Shdr *i_shdr;
1142 unsigned char *contents, *id_bits;
1143 bfd_size_type size;
1144 file_ptr position;
1145 Elf_External_Note *e_note;
1146
1147 style = t->o->build_id.style;
1148 asec = t->o->build_id.sec;
1149 if (bfd_is_abs_section (asec->output_section))
1150 {
1151 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
1152 " --build-id ignored\n"));
1153 return TRUE;
1154 }
1155 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
1156
1157 if (i_shdr->contents == NULL)
1158 {
1159 if (asec->contents == NULL)
1160 asec->contents = (unsigned char *) xmalloc (asec->size);
1161 contents = asec->contents;
1162 }
1163 else
1164 contents = i_shdr->contents + asec->output_offset;
1165
1166 e_note = (Elf_External_Note *) contents;
1167 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
1168 size = (size + 3) & -(bfd_size_type) 4;
1169 id_bits = contents + size;
1170 size = asec->size - size;
1171
1172 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
1173 bfd_h_put_32 (abfd, size, &e_note->descsz);
1174 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
1175 memcpy (e_note->name, "GNU", sizeof "GNU");
1176
1177 generate_build_id (abfd, style, bed->s->checksum_contents, id_bits, size);
1178
1179 position = i_shdr->sh_offset + asec->output_offset;
1180 size = asec->size;
1181 return (bfd_seek (abfd, position, SEEK_SET) == 0
1182 && bfd_bwrite (contents, size, abfd) == size);
1183 }
1184
1185 /* Make .note.gnu.build-id section, and set up elf_tdata->build_id. */
1186
1187 static bfd_boolean
1188 setup_build_id (bfd *ibfd)
1189 {
1190 asection *s;
1191 bfd_size_type size;
1192 flagword flags;
1193
1194 size = id_note_section_size (ibfd);
1195 if (size == 0)
1196 {
1197 einfo (_("%P: warning: unrecognized --build-id style ignored\n"));
1198 return FALSE;
1199 }
1200
1201 flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
1202 | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
1203 s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags);
1204 if (s != NULL && bfd_set_section_alignment (ibfd, s, 2))
1205 {
1206 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1207 t->o->build_id.after_write_object_contents = &write_build_id;
1208 t->o->build_id.style = emit_note_gnu_build_id;
1209 t->o->build_id.sec = s;
1210 elf_section_type (s) = SHT_NOTE;
1211 s->size = size;
1212 return TRUE;
1213 }
1214
1215 einfo (_("%P: warning: cannot create .note.gnu.build-id section,"
1216 " --build-id ignored\n"));
1217 return FALSE;
1218 }
1219
1220 /* This is called after all the input files have been opened. */
1221
1222 static void
1223 gld${EMULATION_NAME}_after_open (void)
1224 {
1225 struct bfd_link_needed_list *needed, *l;
1226 struct elf_link_hash_table *htab;
1227 asection *s;
1228 bfd *abfd;
1229
1230 after_open_default ();
1231
1232 htab = elf_hash_table (&link_info);
1233 if (!is_elf_hash_table (htab))
1234 return;
1235
1236 if (command_line.out_implib_filename)
1237 {
1238 unlink_if_ordinary (command_line.out_implib_filename);
1239 link_info.out_implib_bfd
1240 = bfd_openw (command_line.out_implib_filename,
1241 bfd_get_target (link_info.output_bfd));
1242
1243 if (link_info.out_implib_bfd == NULL)
1244 {
1245 einfo (_("%F%P: %s: can't open for writing: %E\n"),
1246 command_line.out_implib_filename);
1247 }
1248 }
1249
1250 if (emit_note_gnu_build_id != NULL)
1251 {
1252 /* Find an ELF input. */
1253 for (abfd = link_info.input_bfds;
1254 abfd != (bfd *) NULL; abfd = abfd->link.next)
1255 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1256 && bfd_count_sections (abfd) != 0
1257 && !((lang_input_statement_type *) abfd->usrdata)->flags.just_syms)
1258 break;
1259
1260 /* PR 10555: If there are no ELF input files do not try to
1261 create a .note.gnu-build-id section. */
1262 if (abfd == NULL
1263 || !setup_build_id (abfd))
1264 {
1265 free ((char *) emit_note_gnu_build_id);
1266 emit_note_gnu_build_id = NULL;
1267 }
1268 }
1269
1270 get_elf_backend_data (link_info.output_bfd)->setup_gnu_properties (&link_info);
1271
1272 if (bfd_link_relocatable (&link_info))
1273 {
1274 if (link_info.execstack == ! link_info.noexecstack)
1275 /* PR ld/16744: If "-z [no]execstack" has been specified on the
1276 command line and we are perfoming a relocatable link then no
1277 PT_GNU_STACK segment will be created and so the
1278 linkinfo.[no]execstack values set in _handle_option() will have no
1279 effect. Instead we create a .note.GNU-stack section in much the
1280 same way as the assembler does with its --[no]execstack option. */
1281 (void) bfd_make_section_with_flags (link_info.input_bfds,
1282 ".note.GNU-stack",
1283 SEC_READONLY | (link_info.execstack ? SEC_CODE : 0));
1284
1285 return;
1286 }
1287
1288 if (!link_info.traditional_format)
1289 {
1290 bfd *elfbfd = NULL;
1291 bfd_boolean warn_eh_frame = FALSE;
1292 int seen_type = 0;
1293
1294 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1295 {
1296 int type = 0;
1297
1298 if (((lang_input_statement_type *) abfd->usrdata)->flags.just_syms)
1299 continue;
1300
1301 for (s = abfd->sections; s && type < COMPACT_EH_HDR; s = s->next)
1302 {
1303 const char *name = bfd_get_section_name (abfd, s);
1304
1305 if (bfd_is_abs_section (s->output_section))
1306 continue;
1307 if (CONST_STRNEQ (name, ".eh_frame_entry"))
1308 type = COMPACT_EH_HDR;
1309 else if (strcmp (name, ".eh_frame") == 0 && s->size > 8)
1310 type = DWARF2_EH_HDR;
1311 }
1312
1313 if (type != 0)
1314 {
1315 if (seen_type == 0)
1316 {
1317 seen_type = type;
1318 }
1319 else if (seen_type != type)
1320 {
1321 einfo (_("%F%P: compact frame descriptions incompatible with"
1322 " DWARF2 .eh_frame from %pB\n"),
1323 type == DWARF2_EH_HDR ? abfd : elfbfd);
1324 break;
1325 }
1326
1327 if (!elfbfd
1328 && (type == COMPACT_EH_HDR || link_info.eh_frame_hdr_type != 0))
1329 {
1330 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1331 elfbfd = abfd;
1332
1333 warn_eh_frame = TRUE;
1334 }
1335 }
1336
1337 if (seen_type == COMPACT_EH_HDR)
1338 link_info.eh_frame_hdr_type = COMPACT_EH_HDR;
1339 }
1340 if (elfbfd)
1341 {
1342 const struct elf_backend_data *bed;
1343
1344 bed = get_elf_backend_data (elfbfd);
1345 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1346 bed->dynamic_sec_flags
1347 | SEC_READONLY);
1348 if (s != NULL
1349 && bfd_set_section_alignment (elfbfd, s, 2))
1350 {
1351 htab->eh_info.hdr_sec = s;
1352 warn_eh_frame = FALSE;
1353 }
1354 }
1355 if (warn_eh_frame)
1356 einfo (_("%P: warning: cannot create .eh_frame_hdr section,"
1357 " --eh-frame-hdr ignored\n"));
1358 }
1359
1360 /* Get the list of files which appear in DT_NEEDED entries in
1361 dynamic objects included in the link (often there will be none).
1362 For each such file, we want to track down the corresponding
1363 library, and include the symbol table in the link. This is what
1364 the runtime dynamic linker will do. Tracking the files down here
1365 permits one dynamic object to include another without requiring
1366 special action by the person doing the link. Note that the
1367 needed list can actually grow while we are stepping through this
1368 loop. */
1369 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1370 for (l = needed; l != NULL; l = l->next)
1371 {
1372 struct bfd_link_needed_list *ll;
1373 struct dt_needed n, nn;
1374 int force;
1375
1376 /* If the lib that needs this one was --as-needed and wasn't
1377 found to be needed, then this lib isn't needed either. */
1378 if (l->by != NULL
1379 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1380 continue;
1381
1382 /* Skip the lib if --no-copy-dt-needed-entries and
1383 --allow-shlib-undefined is in effect. */
1384 if (l->by != NULL
1385 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1386 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1387 continue;
1388
1389 /* If we've already seen this file, skip it. */
1390 for (ll = needed; ll != l; ll = ll->next)
1391 if ((ll->by == NULL
1392 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1393 && strcmp (ll->name, l->name) == 0)
1394 break;
1395 if (ll != l)
1396 continue;
1397
1398 /* See if this file was included in the link explicitly. */
1399 global_needed = l;
1400 global_found = NULL;
1401 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1402 if (global_found != NULL
1403 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1404 & DYN_AS_NEEDED) == 0)
1405 continue;
1406
1407 n.by = l->by;
1408 n.name = l->name;
1409 nn.by = l->by;
1410 if (verbose)
1411 info_msg (_("%s needed by %pB\n"), l->name, l->by);
1412
1413 /* As-needed libs specified on the command line (or linker script)
1414 take priority over libs found in search dirs. */
1415 if (global_found != NULL)
1416 {
1417 nn.name = global_found->filename;
1418 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1419 continue;
1420 }
1421
1422 /* We need to find this file and include the symbol table. We
1423 want to search for the file in the same way that the dynamic
1424 linker will search. That means that we want to use
1425 rpath_link, rpath, then the environment variable
1426 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1427 entries (native only), then the linker script LIB_SEARCH_DIRS.
1428 We do not search using the -L arguments.
1429
1430 We search twice. The first time, we skip objects which may
1431 introduce version mismatches. The second time, we force
1432 their use. See gld${EMULATION_NAME}_vercheck comment. */
1433 for (force = 0; force < 2; force++)
1434 {
1435 size_t len;
1436 search_dirs_type *search;
1437 EOF
1438 if [ "x${NATIVE}" = xyes ] || [ "x${USE_LIBPATH}" = xyes ] ; then
1439 fragment <<EOF
1440 const char *path;
1441 EOF
1442 fi
1443 if [ "x${USE_LIBPATH}" = xyes ] ; then
1444 fragment <<EOF
1445 struct bfd_link_needed_list *rp;
1446 int found;
1447 EOF
1448 fi
1449 fragment <<EOF
1450
1451 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1452 &n, force))
1453 break;
1454 EOF
1455 if [ "x${USE_LIBPATH}" = xyes ] ; then
1456 fragment <<EOF
1457 path = command_line.rpath;
1458 if (path)
1459 {
1460 path = gld${EMULATION_NAME}_add_sysroot (path);
1461 found = gld${EMULATION_NAME}_search_needed (path, &n, force);
1462 free ((char *) path);
1463 if (found)
1464 break;
1465 }
1466 EOF
1467 fi
1468 if [ "x${NATIVE}" = xyes ] ; then
1469 fragment <<EOF
1470 if (command_line.rpath_link == NULL
1471 && command_line.rpath == NULL)
1472 {
1473 path = (const char *) getenv ("LD_RUN_PATH");
1474 if (path
1475 && gld${EMULATION_NAME}_search_needed (path, &n, force))
1476 break;
1477 }
1478 path = (const char *) getenv ("LD_LIBRARY_PATH");
1479 if (path
1480 && gld${EMULATION_NAME}_search_needed (path, &n, force))
1481 break;
1482 EOF
1483 fi
1484 if [ "x${USE_LIBPATH}" = xyes ] ; then
1485 fragment <<EOF
1486 found = 0;
1487 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1488 for (; !found && rp != NULL; rp = rp->next)
1489 {
1490 path = gld${EMULATION_NAME}_add_sysroot (rp->name);
1491 found = (rp->by == l->by
1492 && gld${EMULATION_NAME}_search_needed (path, &n,
1493 force));
1494 free ((char *) path);
1495 }
1496 if (found)
1497 break;
1498
1499 EOF
1500 fi
1501 if [ "x${USE_LIBPATH}" = xyes ] ; then
1502 case ${target} in
1503 *-*-freebsd* | *-*-dragonfly*)
1504 fragment <<EOF
1505 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1506 break;
1507 EOF
1508 # FreeBSD
1509 ;;
1510
1511 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1512 fragment <<EOF
1513 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1514 break;
1515
1516 EOF
1517 # Linux
1518 ;;
1519 esac
1520 fi
1521 fragment <<EOF
1522 len = strlen (l->name);
1523 for (search = search_head; search != NULL; search = search->next)
1524 {
1525 char *filename;
1526
1527 if (search->cmdline)
1528 continue;
1529 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1530 sprintf (filename, "%s/%s", search->name, l->name);
1531 nn.name = filename;
1532 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1533 break;
1534 free (filename);
1535 }
1536 if (search != NULL)
1537 break;
1538 EOF
1539 fragment <<EOF
1540 }
1541
1542 if (force < 2)
1543 continue;
1544
1545 einfo (_("%P: warning: %s, needed by %pB, not found "
1546 "(try using -rpath or -rpath-link)\n"),
1547 l->name, l->by);
1548 }
1549
1550 if (link_info.eh_frame_hdr_type == COMPACT_EH_HDR)
1551 if (!bfd_elf_parse_eh_frame_entries (NULL, &link_info))
1552 einfo (_("%F%P: failed to parse EH frame entries\n"));
1553 }
1554
1555 EOF
1556 fi
1557
1558 fragment <<EOF
1559
1560 /* Look through an expression for an assignment statement. */
1561
1562 static void
1563 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1564 {
1565 bfd_boolean provide = FALSE;
1566
1567 switch (exp->type.node_class)
1568 {
1569 case etree_provide:
1570 case etree_provided:
1571 provide = TRUE;
1572 /* Fallthru */
1573 case etree_assign:
1574 /* We call record_link_assignment even if the symbol is defined.
1575 This is because if it is defined by a dynamic object, we
1576 actually want to use the value defined by the linker script,
1577 not the value from the dynamic object (because we are setting
1578 symbols like etext). If the symbol is defined by a regular
1579 object, then, as it happens, calling record_link_assignment
1580 will do no harm. */
1581 if (strcmp (exp->assign.dst, ".") != 0)
1582 {
1583 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1584 &link_info,
1585 exp->assign.dst, provide,
1586 exp->assign.hidden))
1587 einfo (_("%F%P: failed to record assignment to %s: %E\n"),
1588 exp->assign.dst);
1589 }
1590 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1591 break;
1592
1593 case etree_binary:
1594 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1595 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1596 break;
1597
1598 case etree_trinary:
1599 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1600 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1601 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1602 break;
1603
1604 case etree_unary:
1605 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1606 break;
1607
1608 default:
1609 break;
1610 }
1611 }
1612
1613
1614 /* This is called by the before_allocation routine via
1615 lang_for_each_statement. It locates any assignment statements, and
1616 tells the ELF backend about them, in case they are assignments to
1617 symbols which are referred to by dynamic objects. */
1618
1619 static void
1620 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1621 {
1622 if (s->header.type == lang_assignment_statement_enum)
1623 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1624 }
1625
1626 EOF
1627
1628 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1629 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1630 ELF_INTERPRETER_SET_DEFAULT="
1631 if (sinterp != NULL)
1632 {
1633 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1634 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1635 }
1636
1637 "
1638 else
1639 ELF_INTERPRETER_SET_DEFAULT=
1640 fi
1641 fragment <<EOF
1642
1643 /* used by before_allocation and handle_option. */
1644 static void
1645 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1646 {
1647 if (*to == NULL)
1648 *to = xstrdup (op_arg);
1649 else
1650 {
1651 size_t to_len = strlen (*to);
1652 size_t op_arg_len = strlen (op_arg);
1653 char *buf;
1654 char *cp = *to;
1655
1656 /* First see whether OPTARG is already in the path. */
1657 do
1658 {
1659 if (strncmp (op_arg, cp, op_arg_len) == 0
1660 && (cp[op_arg_len] == 0
1661 || cp[op_arg_len] == config.rpath_separator))
1662 /* We found it. */
1663 break;
1664
1665 /* Not yet found. */
1666 cp = strchr (cp, config.rpath_separator);
1667 if (cp != NULL)
1668 ++cp;
1669 }
1670 while (cp != NULL);
1671
1672 if (cp == NULL)
1673 {
1674 buf = xmalloc (to_len + op_arg_len + 2);
1675 sprintf (buf, "%s%c%s", *to,
1676 config.rpath_separator, op_arg);
1677 free (*to);
1678 *to = buf;
1679 }
1680 }
1681 }
1682
1683 #if defined(__GNUC__) && GCC_VERSION < 4006
1684 /* Work around a GCC uninitialized warning bug fixed in GCC 4.6. */
1685 static struct bfd_link_hash_entry ehdr_start_empty;
1686 #endif
1687
1688 /* This is called after the sections have been attached to output
1689 sections, but before any sizes or addresses have been set. */
1690
1691 static void
1692 gld${EMULATION_NAME}_before_allocation (void)
1693 {
1694 const char *rpath;
1695 asection *sinterp;
1696 bfd *abfd;
1697 struct elf_link_hash_entry *ehdr_start = NULL;
1698 #if defined(__GNUC__) && GCC_VERSION < 4006
1699 /* Work around a GCC uninitialized warning bug fixed in GCC 4.6. */
1700 struct bfd_link_hash_entry ehdr_start_save = ehdr_start_empty;
1701 #else
1702 struct bfd_link_hash_entry ehdr_start_save;
1703 #endif
1704
1705 if (is_elf_hash_table (link_info.hash))
1706 {
1707 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1708
1709 /* Make __ehdr_start hidden if it has been referenced, to
1710 prevent the symbol from being dynamic. */
1711 if (!bfd_link_relocatable (&link_info))
1712 {
1713 struct elf_link_hash_table *htab = elf_hash_table (&link_info);
1714 struct elf_link_hash_entry *h
1715 = elf_link_hash_lookup (htab, "__ehdr_start", FALSE, FALSE, TRUE);
1716
1717 /* Only adjust the export class if the symbol was referenced
1718 and not defined, otherwise leave it alone. */
1719 if (h != NULL
1720 && (h->root.type == bfd_link_hash_new
1721 || h->root.type == bfd_link_hash_undefined
1722 || h->root.type == bfd_link_hash_undefweak
1723 || h->root.type == bfd_link_hash_common))
1724 {
1725 const struct elf_backend_data *bed;
1726 bed = get_elf_backend_data (link_info.output_bfd);
1727 (*bed->elf_backend_hide_symbol) (&link_info, h, TRUE);
1728 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
1729 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
1730 /* Don't leave the symbol undefined. Undefined hidden
1731 symbols typically won't have dynamic relocations, but
1732 we most likely will need dynamic relocations for
1733 __ehdr_start if we are building a PIE or shared
1734 library. */
1735 ehdr_start = h;
1736 ehdr_start_save = h->root;
1737 h->root.type = bfd_link_hash_defined;
1738 h->root.u.def.section = bfd_abs_section_ptr;
1739 h->root.u.def.value = 0;
1740 }
1741 }
1742
1743 /* If we are going to make any variable assignments, we need to
1744 let the ELF backend know about them in case the variables are
1745 referred to by dynamic objects. */
1746 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1747 }
1748
1749 /* Let the ELF backend work out the sizes of any sections required
1750 by dynamic linking. */
1751 rpath = command_line.rpath;
1752 if (rpath == NULL)
1753 rpath = (const char *) getenv ("LD_RUN_PATH");
1754
1755 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1756 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1757 {
1758 const char *audit_libs = elf_dt_audit (abfd);
1759
1760 /* If the input bfd contains an audit entry, we need to add it as
1761 a dep audit entry. */
1762 if (audit_libs && *audit_libs != '\0')
1763 {
1764 char *cp = xstrdup (audit_libs);
1765 do
1766 {
1767 int more = 0;
1768 char *cp2 = strchr (cp, config.rpath_separator);
1769
1770 if (cp2)
1771 {
1772 *cp2 = '\0';
1773 more = 1;
1774 }
1775
1776 if (cp != NULL && *cp != '\0')
1777 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1778
1779 cp = more ? ++cp2 : NULL;
1780 }
1781 while (cp != NULL);
1782 }
1783 }
1784
1785 if (! (bfd_elf_size_dynamic_sections
1786 (link_info.output_bfd, command_line.soname, rpath,
1787 command_line.filter_shlib, audit, depaudit,
1788 (const char * const *) command_line.auxiliary_filters,
1789 &link_info, &sinterp)))
1790 einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
1791
1792 ${ELF_INTERPRETER_SET_DEFAULT}
1793 /* Let the user override the dynamic linker we are using. */
1794 if (command_line.interpreter != NULL
1795 && sinterp != NULL)
1796 {
1797 sinterp->contents = (bfd_byte *) command_line.interpreter;
1798 sinterp->size = strlen (command_line.interpreter) + 1;
1799 }
1800
1801 /* Look for any sections named .gnu.warning. As a GNU extensions,
1802 we treat such sections as containing warning messages. We print
1803 out the warning message, and then zero out the section size so
1804 that it does not get copied into the output file. */
1805
1806 {
1807 LANG_FOR_EACH_INPUT_STATEMENT (is)
1808 {
1809 asection *s;
1810 bfd_size_type sz;
1811 char *msg;
1812
1813 if (is->flags.just_syms)
1814 continue;
1815
1816 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1817 if (s == NULL)
1818 continue;
1819
1820 sz = s->size;
1821 msg = (char *) xmalloc ((size_t) (sz + 1));
1822 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1823 (file_ptr) 0, sz))
1824 einfo (_("%F%P: %pB: can't read contents of section .gnu.warning: %E\n"),
1825 is->the_bfd);
1826 msg[sz] = '\0';
1827 (*link_info.callbacks->warning) (&link_info, msg,
1828 (const char *) NULL, is->the_bfd,
1829 (asection *) NULL, (bfd_vma) 0);
1830 free (msg);
1831
1832 /* Clobber the section size, so that we don't waste space
1833 copying the warning into the output file. If we've already
1834 sized the output section, adjust its size. The adjustment
1835 is on rawsize because targets that size sections early will
1836 have called lang_reset_memory_regions after sizing. */
1837 if (s->output_section != NULL
1838 && s->output_section->rawsize >= s->size)
1839 s->output_section->rawsize -= s->size;
1840
1841 s->size = 0;
1842
1843 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1844 warning section don't get copied to the output. */
1845 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1846 }
1847 }
1848
1849 before_allocation_default ();
1850
1851 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1852 einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
1853
1854 if (ehdr_start != NULL)
1855 {
1856 /* If we twiddled __ehdr_start to defined earlier, put it back
1857 as it was. */
1858 ehdr_start->root.type = ehdr_start_save.type;
1859 ehdr_start->root.u = ehdr_start_save.u;
1860 }
1861 }
1862
1863 EOF
1864 fi
1865
1866 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1867 fragment <<EOF
1868
1869 /* Try to open a dynamic archive. This is where we know that ELF
1870 dynamic libraries have an extension of .so (or .sl on oddball systems
1871 like hpux). */
1872
1873 static bfd_boolean
1874 gld${EMULATION_NAME}_open_dynamic_archive
1875 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1876 {
1877 const char *filename;
1878 char *string;
1879 size_t len;
1880 bfd_boolean opened = FALSE;
1881
1882 if (! entry->flags.maybe_archive)
1883 return FALSE;
1884
1885 filename = entry->filename;
1886 len = strlen (search->name) + strlen (filename);
1887 if (entry->flags.full_name_provided)
1888 {
1889 len += sizeof "/";
1890 string = (char *) xmalloc (len);
1891 sprintf (string, "%s/%s", search->name, filename);
1892 }
1893 else
1894 {
1895 size_t xlen = 0;
1896
1897 len += strlen (arch) + sizeof "/lib.so";
1898 #ifdef EXTRA_SHLIB_EXTENSION
1899 xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
1900 ? strlen (EXTRA_SHLIB_EXTENSION) - 3
1901 : 0);
1902 #endif
1903 string = (char *) xmalloc (len + xlen);
1904 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1905 #ifdef EXTRA_SHLIB_EXTENSION
1906 /* Try the .so extension first. If that fails build a new filename
1907 using EXTRA_SHLIB_EXTENSION. */
1908 opened = ldfile_try_open_bfd (string, entry);
1909 if (!opened)
1910 strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
1911 #endif
1912 }
1913
1914 if (!opened && !ldfile_try_open_bfd (string, entry))
1915 {
1916 free (string);
1917 return FALSE;
1918 }
1919
1920 entry->filename = string;
1921
1922 /* We have found a dynamic object to include in the link. The ELF
1923 backend linker will create a DT_NEEDED entry in the .dynamic
1924 section naming this file. If this file includes a DT_SONAME
1925 entry, it will be used. Otherwise, the ELF linker will just use
1926 the name of the file. For an archive found by searching, like
1927 this one, the DT_NEEDED entry should consist of just the name of
1928 the file, without the path information used to find it. Note
1929 that we only need to do this if we have a dynamic object; an
1930 archive will never be referenced by a DT_NEEDED entry.
1931
1932 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1933 very pretty. I haven't been able to think of anything that is
1934 pretty, though. */
1935 if (bfd_check_format (entry->the_bfd, bfd_object)
1936 && (entry->the_bfd->flags & DYNAMIC) != 0)
1937 {
1938 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1939
1940 /* Rather than duplicating the logic above. Just use the
1941 filename we recorded earlier. */
1942
1943 if (!entry->flags.full_name_provided)
1944 filename = lbasename (entry->filename);
1945 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1946 }
1947
1948 return TRUE;
1949 }
1950
1951 EOF
1952 fi
1953
1954 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1955 fragment <<EOF
1956
1957 /* A variant of lang_output_section_find used by place_orphan. */
1958
1959 static lang_output_section_statement_type *
1960 output_rel_find (asection *sec, int isdyn)
1961 {
1962 lang_output_section_statement_type *lookup;
1963 lang_output_section_statement_type *last = NULL;
1964 lang_output_section_statement_type *last_alloc = NULL;
1965 lang_output_section_statement_type *last_ro_alloc = NULL;
1966 lang_output_section_statement_type *last_rel = NULL;
1967 lang_output_section_statement_type *last_rel_alloc = NULL;
1968 int rela = sec->name[4] == 'a';
1969
1970 for (lookup = &lang_output_section_statement.head->output_section_statement;
1971 lookup != NULL;
1972 lookup = lookup->next)
1973 {
1974 if (lookup->constraint >= 0
1975 && CONST_STRNEQ (lookup->name, ".rel"))
1976 {
1977 int lookrela = lookup->name[4] == 'a';
1978
1979 /* .rel.dyn must come before all other reloc sections, to suit
1980 GNU ld.so. */
1981 if (isdyn)
1982 break;
1983
1984 /* Don't place after .rel.plt as doing so results in wrong
1985 dynamic tags. */
1986 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1987 break;
1988
1989 if (rela == lookrela || last_rel == NULL)
1990 last_rel = lookup;
1991 if ((rela == lookrela || last_rel_alloc == NULL)
1992 && lookup->bfd_section != NULL
1993 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1994 last_rel_alloc = lookup;
1995 }
1996
1997 last = lookup;
1998 if (lookup->bfd_section != NULL
1999 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
2000 {
2001 last_alloc = lookup;
2002 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
2003 last_ro_alloc = lookup;
2004 }
2005 }
2006
2007 if (last_rel_alloc)
2008 return last_rel_alloc;
2009
2010 if (last_rel)
2011 return last_rel;
2012
2013 if (last_ro_alloc)
2014 return last_ro_alloc;
2015
2016 if (last_alloc)
2017 return last_alloc;
2018
2019 return last;
2020 }
2021
2022 /* Return whether IN is suitable to be part of OUT. */
2023
2024 static bfd_boolean
2025 elf_orphan_compatible (asection *in, asection *out)
2026 {
2027 /* Non-zero sh_info implies a section with SHF_INFO_LINK with
2028 unknown semantics for the generic linker, or a SHT_REL/SHT_RELA
2029 section where sh_info specifies a symbol table. (We won't see
2030 SHT_GROUP, SHT_SYMTAB or SHT_DYNSYM sections here.) We clearly
2031 can't merge SHT_REL/SHT_RELA using differing symbol tables, and
2032 shouldn't merge sections with differing unknown semantics. */
2033 if (elf_section_data (out)->this_hdr.sh_info
2034 != elf_section_data (in)->this_hdr.sh_info)
2035 return FALSE;
2036 /* We can't merge two sections with differing SHF_EXCLUDE when doing
2037 a relocatable link. */
2038 if (bfd_link_relocatable (&link_info)
2039 && ((elf_section_flags (out) ^ elf_section_flags (in)) & SHF_EXCLUDE) != 0)
2040 return FALSE;
2041 return _bfd_elf_match_sections_by_type (link_info.output_bfd, out,
2042 in->owner, in);
2043 }
2044
2045 /* Place an orphan section. We use this to put random SHF_ALLOC
2046 sections in the right segment. */
2047
2048 static lang_output_section_statement_type *
2049 gld${EMULATION_NAME}_place_orphan (asection *s,
2050 const char *secname,
2051 int constraint)
2052 {
2053 static struct orphan_save hold[] =
2054 {
2055 { ".text",
2056 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
2057 0, 0, 0, 0 },
2058 { ".rodata",
2059 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2060 0, 0, 0, 0 },
2061 { ".tdata",
2062 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
2063 0, 0, 0, 0 },
2064 { ".data",
2065 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
2066 0, 0, 0, 0 },
2067 { ".bss",
2068 SEC_ALLOC,
2069 0, 0, 0, 0 },
2070 { 0,
2071 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2072 0, 0, 0, 0 },
2073 { ".interp",
2074 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2075 0, 0, 0, 0 },
2076 { ".sdata",
2077 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
2078 0, 0, 0, 0 },
2079 { ".comment",
2080 SEC_HAS_CONTENTS,
2081 0, 0, 0, 0 },
2082 };
2083 enum orphan_save_index
2084 {
2085 orphan_text = 0,
2086 orphan_rodata,
2087 orphan_tdata,
2088 orphan_data,
2089 orphan_bss,
2090 orphan_rel,
2091 orphan_interp,
2092 orphan_sdata,
2093 orphan_nonalloc
2094 };
2095 static int orphan_init_done = 0;
2096 struct orphan_save *place;
2097 lang_output_section_statement_type *after;
2098 lang_output_section_statement_type *os;
2099 lang_output_section_statement_type *match_by_name = NULL;
2100 int isdyn = 0;
2101 int elfinput = s->owner->xvec->flavour == bfd_target_elf_flavour;
2102 int elfoutput = link_info.output_bfd->xvec->flavour == bfd_target_elf_flavour;
2103 unsigned int sh_type = elfinput ? elf_section_type (s) : SHT_NULL;
2104 flagword flags;
2105 asection *nexts;
2106
2107 if (!bfd_link_relocatable (&link_info)
2108 && link_info.combreloc
2109 && (s->flags & SEC_ALLOC))
2110 {
2111 if (elfinput)
2112 switch (sh_type)
2113 {
2114 case SHT_RELA:
2115 secname = ".rela.dyn";
2116 isdyn = 1;
2117 break;
2118 case SHT_REL:
2119 secname = ".rel.dyn";
2120 isdyn = 1;
2121 break;
2122 default:
2123 break;
2124 }
2125 else if (CONST_STRNEQ (secname, ".rel"))
2126 {
2127 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
2128 isdyn = 1;
2129 }
2130 }
2131
2132 if (!bfd_link_relocatable (&link_info)
2133 && elfinput
2134 && elfoutput
2135 && (s->flags & SEC_ALLOC) != 0
2136 && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
2137 {
2138 /* Find the output mbind section with the same type, attributes
2139 and sh_info field. */
2140 for (os = &lang_output_section_statement.head->output_section_statement;
2141 os != NULL;
2142 os = os->next)
2143 if (os->bfd_section != NULL
2144 && !bfd_is_abs_section (os->bfd_section)
2145 && (elf_section_flags (os->bfd_section) & SHF_GNU_MBIND) != 0
2146 && ((s->flags & (SEC_ALLOC
2147 | SEC_LOAD
2148 | SEC_HAS_CONTENTS
2149 | SEC_READONLY
2150 | SEC_CODE))
2151 == (os->bfd_section->flags & (SEC_ALLOC
2152 | SEC_LOAD
2153 | SEC_HAS_CONTENTS
2154 | SEC_READONLY
2155 | SEC_CODE)))
2156 && (elf_section_data (os->bfd_section)->this_hdr.sh_info
2157 == elf_section_data (s)->this_hdr.sh_info))
2158 {
2159 lang_add_section (&os->children, s, NULL, os);
2160 return os;
2161 }
2162
2163 /* Create the output mbind section with the ".mbind." prefix
2164 in section name. */
2165 if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2166 secname = ".mbind.bss";
2167 else if ((s->flags & SEC_READONLY) == 0)
2168 secname = ".mbind.data";
2169 else if ((s->flags & SEC_CODE) == 0)
2170 secname = ".mbind.rodata";
2171 else
2172 secname = ".mbind.text";
2173 }
2174
2175 /* Look through the script to see where to place this section. The
2176 script includes entries added by previous lang_insert_orphan
2177 calls, so this loop puts multiple compatible orphans of the same
2178 name into a single output section. */
2179 if (constraint == 0)
2180 for (os = lang_output_section_find (secname);
2181 os != NULL;
2182 os = next_matching_output_section_statement (os, 0))
2183 {
2184 /* If we don't match an existing output section, tell
2185 lang_insert_orphan to create a new output section. */
2186 constraint = SPECIAL;
2187
2188 /* Check to see if we already have an output section statement
2189 with this name, and its bfd section has compatible flags.
2190 If the section already exists but does not have any flags
2191 set, then it has been created by the linker, possibly as a
2192 result of a --section-start command line switch. */
2193 if (os->bfd_section != NULL
2194 && (os->bfd_section->flags == 0
2195 || (((s->flags ^ os->bfd_section->flags)
2196 & (SEC_LOAD | SEC_ALLOC)) == 0
2197 && (!elfinput
2198 || !elfoutput
2199 || elf_orphan_compatible (s, os->bfd_section)))))
2200 {
2201 lang_add_section (&os->children, s, NULL, os);
2202 return os;
2203 }
2204
2205 /* Save unused output sections in case we can match them
2206 against orphans later. */
2207 if (os->bfd_section == NULL)
2208 match_by_name = os;
2209 }
2210
2211 /* If we didn't match an active output section, see if we matched an
2212 unused one and use that. */
2213 if (match_by_name)
2214 {
2215 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
2216 return match_by_name;
2217 }
2218
2219 if (!orphan_init_done)
2220 {
2221 struct orphan_save *ho;
2222
2223 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
2224 if (ho->name != NULL)
2225 {
2226 ho->os = lang_output_section_find (ho->name);
2227 if (ho->os != NULL && ho->os->flags == 0)
2228 ho->os->flags = ho->flags;
2229 }
2230 orphan_init_done = 1;
2231 }
2232
2233 /* If this is a final link, then always put .gnu.warning.SYMBOL
2234 sections into the .text section to get them out of the way. */
2235 if (bfd_link_executable (&link_info)
2236 && CONST_STRNEQ (s->name, ".gnu.warning.")
2237 && hold[orphan_text].os != NULL)
2238 {
2239 os = hold[orphan_text].os;
2240 lang_add_section (&os->children, s, NULL, os);
2241 return os;
2242 }
2243
2244 flags = s->flags;
2245 if (!bfd_link_relocatable (&link_info))
2246 {
2247 nexts = s;
2248 while ((nexts = bfd_get_next_section_by_name (nexts->owner, nexts))
2249 != NULL)
2250 if (nexts->output_section == NULL
2251 && (nexts->flags & SEC_EXCLUDE) == 0
2252 && ((nexts->flags ^ flags) & (SEC_LOAD | SEC_ALLOC)) == 0
2253 && (nexts->owner->flags & DYNAMIC) == 0
2254 && nexts->owner->usrdata != NULL
2255 && !(((lang_input_statement_type *) nexts->owner->usrdata)
2256 ->flags.just_syms)
2257 && _bfd_elf_match_sections_by_type (nexts->owner, nexts,
2258 s->owner, s))
2259 flags = (((flags ^ SEC_READONLY)
2260 | (nexts->flags ^ SEC_READONLY))
2261 ^ SEC_READONLY);
2262 }
2263
2264 /* Decide which segment the section should go in based on the
2265 section name and section flags. We put loadable .note sections
2266 right after the .interp section, so that the PT_NOTE segment is
2267 stored right after the program headers where the OS can read it
2268 in the first page. */
2269
2270 place = NULL;
2271 if ((flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
2272 place = &hold[orphan_nonalloc];
2273 else if ((flags & SEC_ALLOC) == 0)
2274 ;
2275 else if ((flags & SEC_LOAD) != 0
2276 && ((elfinput && sh_type == SHT_NOTE)
2277 || (!elfinput && CONST_STRNEQ (secname, ".note"))))
2278 place = &hold[orphan_interp];
2279 else if ((flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
2280 place = &hold[orphan_bss];
2281 else if ((flags & SEC_SMALL_DATA) != 0)
2282 place = &hold[orphan_sdata];
2283 else if ((flags & SEC_THREAD_LOCAL) != 0)
2284 place = &hold[orphan_tdata];
2285 else if ((flags & SEC_READONLY) == 0)
2286 place = &hold[orphan_data];
2287 else if (((elfinput && (sh_type == SHT_RELA || sh_type == SHT_REL))
2288 || (!elfinput && CONST_STRNEQ (secname, ".rel")))
2289 && (flags & SEC_LOAD) != 0)
2290 place = &hold[orphan_rel];
2291 else if ((flags & SEC_CODE) == 0)
2292 place = &hold[orphan_rodata];
2293 else
2294 place = &hold[orphan_text];
2295
2296 after = NULL;
2297 if (place != NULL)
2298 {
2299 if (place->os == NULL)
2300 {
2301 if (place->name != NULL)
2302 place->os = lang_output_section_find (place->name);
2303 else
2304 place->os = output_rel_find (s, isdyn);
2305 }
2306 after = place->os;
2307 if (after == NULL)
2308 after
2309 = lang_output_section_find_by_flags (s, flags, &place->os,
2310 _bfd_elf_match_sections_by_type);
2311 if (after == NULL)
2312 /* *ABS* is always the first output section statement. */
2313 after = &lang_output_section_statement.head->output_section_statement;
2314 }
2315
2316 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
2317 }
2318 EOF
2319 fi
2320
2321 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
2322 fragment <<EOF
2323
2324 static void
2325 gld${EMULATION_NAME}_after_allocation (void)
2326 {
2327 int need_layout = bfd_elf_discard_info (link_info.output_bfd, &link_info);
2328
2329 if (need_layout < 0)
2330 einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
2331 else
2332 gld${EMULATION_NAME}_map_segments (need_layout);
2333 }
2334 EOF
2335 fi
2336
2337 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
2338 fragment <<EOF
2339
2340 static char *
2341 gld${EMULATION_NAME}_get_script (int *isfile)
2342 EOF
2343
2344 if test x"$COMPILE_IN" = xyes
2345 then
2346 # Scripts compiled in.
2347
2348 # sed commands to quote an ld script as a C string.
2349 sc="-f stringify.sed"
2350
2351 fragment <<EOF
2352 {
2353 *isfile = 0;
2354
2355 if (bfd_link_relocatable (&link_info) && config.build_constructors)
2356 return
2357 EOF
2358 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2359 echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
2360 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2361 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2362 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2363 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2364 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2365 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2366 fi
2367 if test -n "$GENERATE_PIE_SCRIPT" ; then
2368 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2369 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2370 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2371 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2372 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2373 sed $sc ldscripts/${EMULATION_NAME}.xdwe >> e${EMULATION_NAME}.c
2374 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2375 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2376 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2377 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2378 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2379 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2380 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2381 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2382 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2383 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2384 sed $sc ldscripts/${EMULATION_NAME}.xdceo >> e${EMULATION_NAME}.c
2385 fi
2386 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2387 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2388 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2389 sed $sc ldscripts/${EMULATION_NAME}.xdce >> e${EMULATION_NAME}.c
2390 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2391 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2392 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2393 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2394 sed $sc ldscripts/${EMULATION_NAME}.xdco >> e${EMULATION_NAME}.c
2395 fi
2396 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2397 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2398 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2399 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2400 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2401 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2402 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2403 sed $sc ldscripts/${EMULATION_NAME}.xdeo >> e${EMULATION_NAME}.c
2404 fi
2405 fi
2406 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2407 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2408 sed $sc ldscripts/${EMULATION_NAME}.xde >> e${EMULATION_NAME}.c
2409 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2410 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2411 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2412 sed $sc ldscripts/${EMULATION_NAME}.xdo >> e${EMULATION_NAME}.c
2413 fi
2414 echo ' ; else if (bfd_link_pie (&link_info)) return' >> e${EMULATION_NAME}.c
2415 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2416 fi
2417 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2418 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2419 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2420 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2421 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2422 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2423 sed $sc ldscripts/${EMULATION_NAME}.xswe >> e${EMULATION_NAME}.c
2424 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2425 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2426 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2427 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2428 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2429 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2430 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2431 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2432 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2433 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2434 sed $sc ldscripts/${EMULATION_NAME}.xsceo >> e${EMULATION_NAME}.c
2435 fi
2436 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2437 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2438 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2439 sed $sc ldscripts/${EMULATION_NAME}.xsce >> e${EMULATION_NAME}.c
2440 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2441 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2442 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2443 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2444 sed $sc ldscripts/${EMULATION_NAME}.xsco >> e${EMULATION_NAME}.c
2445 fi
2446 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2447 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2448 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2449 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2450 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2451 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2452 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2453 sed $sc ldscripts/${EMULATION_NAME}.xseo >> e${EMULATION_NAME}.c
2454 fi
2455 fi
2456 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2457 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2458 sed $sc ldscripts/${EMULATION_NAME}.xse >> e${EMULATION_NAME}.c
2459 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2460 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2461 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2462 sed $sc ldscripts/${EMULATION_NAME}.xso >> e${EMULATION_NAME}.c
2463 fi
2464 echo ' ; else if (bfd_link_dll (&link_info)) return' >> e${EMULATION_NAME}.c
2465 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2466 fi
2467 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2468 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2469 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2470 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2471 sed $sc ldscripts/${EMULATION_NAME}.xwe >> e${EMULATION_NAME}.c
2472 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2473 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2474 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2475 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2476 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2477 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2478 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2479 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2480 sed $sc ldscripts/${EMULATION_NAME}.xceo >> e${EMULATION_NAME}.c
2481 fi
2482 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2483 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2484 sed $sc ldscripts/${EMULATION_NAME}.xce >> e${EMULATION_NAME}.c
2485 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2486 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2487 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2488 sed $sc ldscripts/${EMULATION_NAME}.xco >> e${EMULATION_NAME}.c
2489 fi
2490 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2491 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2492 fi
2493 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2494 echo ' ; else if (link_info.separate_code' >> e${EMULATION_NAME}.c
2495 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2496 sed $sc ldscripts/${EMULATION_NAME}.xeo >> e${EMULATION_NAME}.c
2497 fi
2498 echo ' ; else if (link_info.separate_code) return' >> e${EMULATION_NAME}.c
2499 sed $sc ldscripts/${EMULATION_NAME}.xe >> e${EMULATION_NAME}.c
2500 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2501 echo ' ; else if (link_info.relro) return' >> e${EMULATION_NAME}.c
2502 sed $sc ldscripts/${EMULATION_NAME}.xo >> e${EMULATION_NAME}.c
2503 fi
2504 echo ' ; else return' >> e${EMULATION_NAME}.c
2505 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2506 echo '; }' >> e${EMULATION_NAME}.c
2507
2508 else
2509 # Scripts read from the filesystem.
2510
2511 fragment <<EOF
2512 {
2513 *isfile = 1;
2514
2515 if (bfd_link_relocatable (&link_info) && config.build_constructors)
2516 return "ldscripts/${EMULATION_NAME}.xu";
2517 else if (bfd_link_relocatable (&link_info))
2518 return "ldscripts/${EMULATION_NAME}.xr";
2519 else if (!config.text_read_only)
2520 return "ldscripts/${EMULATION_NAME}.xbn";
2521 EOF
2522 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2523 else
2524 fragment <<EOF
2525 else if (!config.magic_demand_paged)
2526 return "ldscripts/${EMULATION_NAME}.xn";
2527 EOF
2528 fi
2529 if test -n "$GENERATE_PIE_SCRIPT" ; then
2530 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2531 fragment <<EOF
2532 else if (bfd_link_pie (&link_info)
2533 && link_info.combreloc
2534 && link_info.relro
2535 && (link_info.flags & DF_BIND_NOW))
2536 {
2537 if (link_info.separate_code)
2538 return "ldscripts/${EMULATION_NAME}.xdwe";
2539 else
2540 return "ldscripts/${EMULATION_NAME}.xdw";
2541 }
2542 EOF
2543 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2544 fragment <<EOF
2545 else if (bfd_link_pie (&link_info)
2546 && link_info.combreloc
2547 && link_info.relro)
2548 {
2549 if (link_info.separate_code)
2550 return "ldscripts/${EMULATION_NAME}.xdceo";
2551 else
2552 return "ldscripts/${EMULATION_NAME}.xdco";
2553 }
2554 EOF
2555 fi
2556 fragment <<EOF
2557 else if (bfd_link_pie (&link_info)
2558 && link_info.combreloc)
2559 {
2560 if (link_info.separate_code)
2561 return "ldscripts/${EMULATION_NAME}.xdce";
2562 else
2563 return "ldscripts/${EMULATION_NAME}.xdc";
2564 }
2565 EOF
2566 fi
2567 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2568 fragment <<EOF
2569 else if (bfd_link_pie (&link_info)
2570 && link_info.relro)
2571 {
2572 if (link_info.separate_code)
2573 return "ldscripts/${EMULATION_NAME}.xdeo";
2574 else
2575 return "ldscripts/${EMULATION_NAME}.xdo";
2576 }
2577 EOF
2578 fi
2579 fragment <<EOF
2580 else if (bfd_link_pie (&link_info))
2581 {
2582 if (link_info.separate_code)
2583 return "ldscripts/${EMULATION_NAME}.xde";
2584 else
2585 return "ldscripts/${EMULATION_NAME}.xd";
2586 }
2587 EOF
2588 fi
2589 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2590 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2591 fragment <<EOF
2592 else if (bfd_link_dll (&link_info) && link_info.combreloc
2593 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2594 {
2595 if (link_info.separate_code)
2596 return "ldscripts/${EMULATION_NAME}.xswe";
2597 else
2598 return "ldscripts/${EMULATION_NAME}.xsw";
2599 }
2600 EOF
2601 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2602 fragment <<EOF
2603 else if (bfd_link_dll (&link_info)
2604 && link_info.combreloc
2605 && link_info.relro)
2606 {
2607 if (link_info.separate_code)
2608 return "ldscripts/${EMULATION_NAME}.xsceo";
2609 else
2610 return "ldscripts/${EMULATION_NAME}.xsco";
2611 }
2612 EOF
2613 fi
2614 fragment <<EOF
2615 else if (bfd_link_dll (&link_info) && link_info.combreloc)
2616 {
2617 if (link_info.separate_code)
2618 return "ldscripts/${EMULATION_NAME}.xsce";
2619 else
2620 return "ldscripts/${EMULATION_NAME}.xsc";
2621 }
2622 EOF
2623 fi
2624 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2625 fragment <<EOF
2626 else if (bfd_link_dll (&link_info)
2627 && link_info.relro)
2628 {
2629 if (link_info.separate_code)
2630 return "ldscripts/${EMULATION_NAME}.xseo";
2631 else
2632 return "ldscripts/${EMULATION_NAME}.xso";
2633 }
2634 EOF
2635 fi
2636 fragment <<EOF
2637 else if (bfd_link_dll (&link_info))
2638 {
2639 if (link_info.separate_code)
2640 return "ldscripts/${EMULATION_NAME}.xse";
2641 else
2642 return "ldscripts/${EMULATION_NAME}.xs";
2643 }
2644 EOF
2645 fi
2646 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2647 fragment <<EOF
2648 else if (link_info.combreloc && link_info.relro
2649 && (link_info.flags & DF_BIND_NOW))
2650 {
2651 if (link_info.separate_code)
2652 return "ldscripts/${EMULATION_NAME}.xwe";
2653 else
2654 return "ldscripts/${EMULATION_NAME}.xw";
2655 }
2656 EOF
2657 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2658 fragment <<EOF
2659 else if (link_info.combreloc
2660 && link_info.relro)
2661 {
2662 if (link_info.separate_code)
2663 return "ldscripts/${EMULATION_NAME}.xceo";
2664 else
2665 return "ldscripts/${EMULATION_NAME}.xco";
2666 }
2667 EOF
2668 fi
2669 fragment <<EOF
2670 else if (link_info.combreloc)
2671 {
2672 if (link_info.separate_code)
2673 return "ldscripts/${EMULATION_NAME}.xce";
2674 else
2675 return "ldscripts/${EMULATION_NAME}.xc";
2676 }
2677 EOF
2678 fi
2679 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2680 fragment <<EOF
2681 else if (link_info.relro)
2682 {
2683 if (link_info.separate_code)
2684 return "ldscripts/${EMULATION_NAME}.xeo";
2685 else
2686 return "ldscripts/${EMULATION_NAME}.xo";
2687 }
2688 EOF
2689 fi
2690 fragment <<EOF
2691 else
2692 {
2693 if (link_info.separate_code)
2694 return "ldscripts/${EMULATION_NAME}.xe";
2695 else
2696 return "ldscripts/${EMULATION_NAME}.x";
2697 }
2698 }
2699
2700 EOF
2701 fi
2702 fi
2703
2704 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2705 fragment <<EOF
2706 $PARSE_AND_LIST_PROLOGUE
2707 EOF
2708 fi
2709
2710 fragment <<EOF
2711
2712 enum elf_options
2713 {
2714 OPTION_DISABLE_NEW_DTAGS = 400,
2715 OPTION_ENABLE_NEW_DTAGS,
2716 OPTION_GROUP,
2717 OPTION_EH_FRAME_HDR,
2718 OPTION_NO_EH_FRAME_HDR,
2719 OPTION_EXCLUDE_LIBS,
2720 OPTION_HASH_STYLE,
2721 OPTION_BUILD_ID,
2722 OPTION_AUDIT,
2723 OPTION_COMPRESS_DEBUG
2724 };
2725
2726 static void
2727 gld${EMULATION_NAME}_add_options
2728 (int ns, char **shortopts, int nl, struct option **longopts,
2729 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2730 {
2731 EOF
2732 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2733 fragment <<EOF
2734 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2735 EOF
2736 else
2737 fragment <<EOF
2738 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2739 EOF
2740 fi
2741 fragment <<EOF
2742 static const struct option xtra_long[] = {
2743 EOF
2744 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2745 fragment <<EOF
2746 {"audit", required_argument, NULL, OPTION_AUDIT},
2747 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2748 EOF
2749 fi
2750 fragment <<EOF
2751 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2752 {"compress-debug-sections", required_argument, NULL, OPTION_COMPRESS_DEBUG},
2753 EOF
2754 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2755 fragment <<EOF
2756 {"depaudit", required_argument, NULL, 'P'},
2757 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2758 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2759 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2760 {"no-eh-frame-hdr", no_argument, NULL, OPTION_NO_EH_FRAME_HDR},
2761 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2762 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2763 EOF
2764 fi
2765 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2766 fragment <<EOF
2767 $PARSE_AND_LIST_LONGOPTS
2768 EOF
2769 fi
2770 fragment <<EOF
2771 {NULL, no_argument, NULL, 0}
2772 };
2773
2774 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2775 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2776 *longopts = (struct option *)
2777 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2778 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2779 }
2780
2781 #define DEFAULT_BUILD_ID_STYLE "sha1"
2782
2783 static bfd_boolean
2784 gld${EMULATION_NAME}_handle_option (int optc)
2785 {
2786 switch (optc)
2787 {
2788 default:
2789 return FALSE;
2790
2791 case OPTION_BUILD_ID:
2792 if (emit_note_gnu_build_id != NULL)
2793 {
2794 free ((char *) emit_note_gnu_build_id);
2795 emit_note_gnu_build_id = NULL;
2796 }
2797 if (optarg == NULL)
2798 optarg = DEFAULT_BUILD_ID_STYLE;
2799 if (strcmp (optarg, "none"))
2800 emit_note_gnu_build_id = xstrdup (optarg);
2801 break;
2802
2803 case OPTION_COMPRESS_DEBUG:
2804 if (strcasecmp (optarg, "none") == 0)
2805 link_info.compress_debug = COMPRESS_DEBUG_NONE;
2806 else if (strcasecmp (optarg, "zlib") == 0)
2807 link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
2808 else if (strcasecmp (optarg, "zlib-gnu") == 0)
2809 link_info.compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
2810 else if (strcasecmp (optarg, "zlib-gabi") == 0)
2811 link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
2812 else
2813 einfo (_("%F%P: invalid --compress-debug-sections option: \`%s'\n"),
2814 optarg);
2815 break;
2816 EOF
2817
2818 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2819 fragment <<EOF
2820 case OPTION_AUDIT:
2821 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2822 break;
2823
2824 case 'P':
2825 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2826 break;
2827
2828 case OPTION_DISABLE_NEW_DTAGS:
2829 link_info.new_dtags = FALSE;
2830 break;
2831
2832 case OPTION_ENABLE_NEW_DTAGS:
2833 link_info.new_dtags = TRUE;
2834 break;
2835
2836 case OPTION_EH_FRAME_HDR:
2837 link_info.eh_frame_hdr_type = DWARF2_EH_HDR;
2838 break;
2839
2840 case OPTION_NO_EH_FRAME_HDR:
2841 link_info.eh_frame_hdr_type = 0;
2842 break;
2843
2844 case OPTION_GROUP:
2845 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2846 /* Groups must be self-contained. */
2847 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2848 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2849 break;
2850
2851 case OPTION_EXCLUDE_LIBS:
2852 add_excluded_libs (optarg);
2853 break;
2854
2855 case OPTION_HASH_STYLE:
2856 link_info.emit_hash = FALSE;
2857 link_info.emit_gnu_hash = FALSE;
2858 if (strcmp (optarg, "sysv") == 0)
2859 link_info.emit_hash = TRUE;
2860 else if (strcmp (optarg, "gnu") == 0)
2861 link_info.emit_gnu_hash = TRUE;
2862 else if (strcmp (optarg, "both") == 0)
2863 {
2864 link_info.emit_hash = TRUE;
2865 link_info.emit_gnu_hash = TRUE;
2866 }
2867 else
2868 einfo (_("%F%P: invalid hash style \`%s'\n"), optarg);
2869 break;
2870
2871 EOF
2872 fi
2873 fragment <<EOF
2874 case 'z':
2875 if (strcmp (optarg, "defs") == 0)
2876 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2877 else if (strcmp (optarg, "undefs") == 0)
2878 link_info.unresolved_syms_in_objects = RM_IGNORE;
2879 else if (strcmp (optarg, "muldefs") == 0)
2880 link_info.allow_multiple_definition = TRUE;
2881 else if (CONST_STRNEQ (optarg, "max-page-size="))
2882 {
2883 char *end;
2884
2885 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2886 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2887 einfo (_("%F%P: invalid maximum page size \`%s'\n"),
2888 optarg + 14);
2889 }
2890 else if (CONST_STRNEQ (optarg, "common-page-size="))
2891 {
2892 char *end;
2893 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2894 if (*end
2895 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2896 einfo (_("%F%P: invalid common page size \`%s'\n"),
2897 optarg + 17);
2898 }
2899 else if (CONST_STRNEQ (optarg, "stack-size="))
2900 {
2901 char *end;
2902 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2903 if (*end || link_info.stacksize < 0)
2904 einfo (_("%F%P: invalid stack size \`%s'\n"), optarg + 11);
2905 if (!link_info.stacksize)
2906 /* Use -1 for explicit no-stack, because zero means
2907 'default'. */
2908 link_info.stacksize = -1;
2909 }
2910 else if (strcmp (optarg, "execstack") == 0)
2911 {
2912 link_info.execstack = TRUE;
2913 link_info.noexecstack = FALSE;
2914 }
2915 else if (strcmp (optarg, "noexecstack") == 0)
2916 {
2917 link_info.noexecstack = TRUE;
2918 link_info.execstack = FALSE;
2919 }
2920 else if (strcmp (optarg, "globalaudit") == 0)
2921 {
2922 link_info.flags_1 |= DF_1_GLOBAUDIT;
2923 }
2924 EOF
2925
2926 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2927 fragment <<EOF
2928 else if (strcmp (optarg, "global") == 0)
2929 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2930 else if (strcmp (optarg, "initfirst") == 0)
2931 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2932 else if (strcmp (optarg, "interpose") == 0)
2933 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2934 else if (strcmp (optarg, "loadfltr") == 0)
2935 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2936 else if (strcmp (optarg, "nodefaultlib") == 0)
2937 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2938 else if (strcmp (optarg, "nodelete") == 0)
2939 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2940 else if (strcmp (optarg, "nodlopen") == 0)
2941 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2942 else if (strcmp (optarg, "nodump") == 0)
2943 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2944 else if (strcmp (optarg, "now") == 0)
2945 {
2946 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2947 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2948 }
2949 else if (strcmp (optarg, "lazy") == 0)
2950 {
2951 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2952 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2953 }
2954 else if (strcmp (optarg, "origin") == 0)
2955 {
2956 link_info.flags |= (bfd_vma) DF_ORIGIN;
2957 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2958 }
2959 else if (strcmp (optarg, "combreloc") == 0)
2960 link_info.combreloc = TRUE;
2961 else if (strcmp (optarg, "nocombreloc") == 0)
2962 link_info.combreloc = FALSE;
2963 else if (strcmp (optarg, "nocopyreloc") == 0)
2964 link_info.nocopyreloc = TRUE;
2965 else if (strcmp (optarg, "relro") == 0)
2966 link_info.relro = TRUE;
2967 else if (strcmp (optarg, "norelro") == 0)
2968 link_info.relro = FALSE;
2969 else if (strcmp (optarg, "separate-code") == 0)
2970 link_info.separate_code = TRUE;
2971 else if (strcmp (optarg, "noseparate-code") == 0)
2972 link_info.separate_code = FALSE;
2973 else if (strcmp (optarg, "common") == 0)
2974 link_info.elf_stt_common = elf_stt_common;
2975 else if (strcmp (optarg, "nocommon") == 0)
2976 link_info.elf_stt_common = no_elf_stt_common;
2977 else if (strcmp (optarg, "text") == 0)
2978 link_info.error_textrel = TRUE;
2979 else if (strcmp (optarg, "notext") == 0)
2980 link_info.error_textrel = FALSE;
2981 else if (strcmp (optarg, "textoff") == 0)
2982 link_info.error_textrel = FALSE;
2983 EOF
2984 fi
2985
2986 if test -n "$PARSE_AND_LIST_ARGS_CASE_Z" ; then
2987 fragment <<EOF
2988 $PARSE_AND_LIST_ARGS_CASE_Z
2989 EOF
2990 fi
2991
2992 fragment <<EOF
2993 else
2994 einfo (_("%P: warning: -z %s ignored\n"), optarg);
2995 break;
2996 EOF
2997
2998 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2999 fragment <<EOF
3000 $PARSE_AND_LIST_ARGS_CASES
3001 EOF
3002 fi
3003
3004 fragment <<EOF
3005 }
3006
3007 return TRUE;
3008 }
3009
3010 EOF
3011
3012 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
3013 gld_list_options="gld${EMULATION_NAME}_list_options"
3014 if test -n "$PARSE_AND_LIST_OPTIONS"; then
3015 fragment <<EOF
3016
3017 static void
3018 gld${EMULATION_NAME}_list_options (FILE * file)
3019 {
3020 EOF
3021
3022 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
3023 fragment <<EOF
3024 $PARSE_AND_LIST_OPTIONS
3025 EOF
3026 fi
3027
3028 fragment <<EOF
3029 }
3030 EOF
3031 else
3032 gld_list_options="NULL"
3033 fi
3034
3035 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
3036 fragment <<EOF
3037 $PARSE_AND_LIST_EPILOGUE
3038 EOF
3039 fi
3040 fi
3041
3042 fragment <<EOF
3043
3044 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
3045 {
3046 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
3047 ${LDEMUL_SYSLIB-syslib_default},
3048 ${LDEMUL_HLL-hll_default},
3049 ${LDEMUL_AFTER_PARSE-gld${EMULATION_NAME}_after_parse},
3050 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
3051 ${LDEMUL_AFTER_CHECK_RELOCS-after_check_relocs_default},
3052 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
3053 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
3054 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
3055 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
3056 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
3057 "${EMULATION_NAME}",
3058 "${OUTPUT_FORMAT}",
3059 ${LDEMUL_FINISH-finish_default},
3060 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
3061 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
3062 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
3063 ${LDEMUL_SET_SYMBOLS-NULL},
3064 ${LDEMUL_PARSE_ARGS-NULL},
3065 gld${EMULATION_NAME}_add_options,
3066 gld${EMULATION_NAME}_handle_option,
3067 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
3068 ${LDEMUL_LIST_OPTIONS-${gld_list_options}},
3069 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
3070 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
3071 ${LDEMUL_NEW_VERS_PATTERN-NULL},
3072 ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL}
3073 };
3074 EOF
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