f3c6e3adeee5d78b6c0a8b764eed299be1424fc4
[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 ${EMULATION_NAME}
15 Copyright (C) 1991-2019 Free Software Foundation, Inc.
16 Written by Steve Chamberlain <sac@cygnus.com>
17 ELF support by Ian Lance Taylor <ian@cygnus.com>
18
19 This file is part of the GNU Binutils.
20
21 This program is free software; you can redistribute it and/or modify
22 it under the terms of the GNU General Public License as published by
23 the Free Software Foundation; either version 3 of the License, or
24 (at your option) any later version.
25
26 This program is distributed in the hope that it will be useful,
27 but WITHOUT ANY WARRANTY; without even the implied warranty of
28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 GNU General Public License for more details.
30
31 You should have received a copy of the GNU General Public License
32 along with this program; if not, write to the Free Software
33 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
34 MA 02110-1301, USA. */
35
36 #define TARGET_IS_${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${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
106 link_info.check_relocs_after_open_input = TRUE;
107 link_info.relro = DEFAULT_LD_Z_RELRO;
108 link_info.separate_code = DEFAULT_LD_Z_SEPARATE_CODE;
109 }
110
111 EOF
112 fi
113
114 if test x"$LDEMUL_AFTER_PARSE" != xgld"$EMULATION_NAME"_after_parse; then
115 fragment <<EOF
116
117 static void
118 gld${EMULATION_NAME}_after_parse (void)
119 {
120 if (bfd_link_pie (&link_info))
121 link_info.flags_1 |= (bfd_vma) DF_1_PIE;
122
123 if (bfd_link_executable (&link_info)
124 && link_info.nointerp)
125 {
126 if (link_info.dynamic_undefined_weak > 0)
127 einfo (_("%P: warning: -z dynamic-undefined-weak ignored\n"));
128 link_info.dynamic_undefined_weak = 0;
129 }
130 after_parse_default ();
131 }
132
133 EOF
134 fi
135
136 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
137 fragment <<EOF
138 /* Handle the generation of DT_NEEDED tags. */
139
140 static bfd_boolean
141 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
142 {
143 int link_class = 0;
144
145 /* Tell the ELF linker that we don't want the output file to have a
146 DT_NEEDED entry for this file, unless it is used to resolve
147 references in a regular object. */
148 if (entry->flags.add_DT_NEEDED_for_regular)
149 link_class = DYN_AS_NEEDED;
150
151 /* Tell the ELF linker that we don't want the output file to have a
152 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
153 this file at all. */
154 if (!entry->flags.add_DT_NEEDED_for_dynamic)
155 link_class |= DYN_NO_ADD_NEEDED;
156
157 if (entry->flags.just_syms
158 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
159 einfo (_("%F%P: %pB: --just-symbols may not be used on DSO\n"),
160 entry->the_bfd);
161
162 if (link_class == 0
163 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
164 return FALSE;
165
166 bfd_elf_set_dyn_lib_class (entry->the_bfd,
167 (enum dynamic_lib_link_class) link_class);
168
169 /* Continue on with normal load_symbols processing. */
170 return FALSE;
171 }
172 EOF
173 fi
174
175 fragment <<EOF
176
177 /* These variables are required to pass information back and forth
178 between after_open and check_needed and stat_needed and vercheck. */
179
180 static struct bfd_link_needed_list *global_needed;
181 static struct stat global_stat;
182 static lang_input_statement_type *global_found;
183 static struct bfd_link_needed_list *global_vercheck_needed;
184 static bfd_boolean global_vercheck_failed;
185
186 /* These variables are used to implement target options */
187
188 static char *audit; /* colon (typically) separated list of libs */
189 static char *depaudit; /* colon (typically) separated list of libs */
190
191 /* Style of .note.gnu.build-id section. */
192 static const char *emit_note_gnu_build_id;
193
194 /* On Linux, it's possible to have different versions of the same
195 shared library linked against different versions of libc. The
196 dynamic linker somehow tags which libc version to use in
197 /etc/ld.so.cache, and, based on the libc that it sees in the
198 executable, chooses which version of the shared library to use.
199
200 We try to do a similar check here by checking whether this shared
201 library needs any other shared libraries which may conflict with
202 libraries we have already included in the link. If it does, we
203 skip it, and try to find another shared library farther on down the
204 link path.
205
206 This is called via lang_for_each_input_file.
207 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
208 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
209 a conflicting version. */
210
211 static void
212 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
213 {
214 const char *soname;
215 struct bfd_link_needed_list *l;
216
217 if (global_vercheck_failed)
218 return;
219 if (s->the_bfd == NULL
220 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
221 return;
222
223 soname = bfd_elf_get_dt_soname (s->the_bfd);
224 if (soname == NULL)
225 soname = lbasename (bfd_get_filename (s->the_bfd));
226
227 for (l = global_vercheck_needed; l != NULL; l = l->next)
228 {
229 const char *suffix;
230
231 if (filename_cmp (soname, l->name) == 0)
232 {
233 /* Probably can't happen, but it's an easy check. */
234 continue;
235 }
236
237 if (strchr (l->name, '/') != NULL)
238 continue;
239
240 suffix = strstr (l->name, ".so.");
241 if (suffix == NULL)
242 continue;
243
244 suffix += sizeof ".so." - 1;
245
246 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
247 {
248 /* Here we know that S is a dynamic object FOO.SO.VER1, and
249 the object we are considering needs a dynamic object
250 FOO.SO.VER2, and VER1 and VER2 are different. This
251 appears to be a version mismatch, so we tell the caller
252 to try a different version of this library. */
253 global_vercheck_failed = TRUE;
254 return;
255 }
256 }
257 }
258
259
260 /* See if an input file matches a DT_NEEDED entry by running stat on
261 the file. */
262
263 static void
264 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
265 {
266 struct stat st;
267 const char *suffix;
268 const char *soname;
269
270 if (global_found != NULL)
271 return;
272 if (s->the_bfd == NULL)
273 return;
274
275 /* If this input file was an as-needed entry, and wasn't found to be
276 needed at the stage it was linked, then don't say we have loaded it. */
277 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
278 return;
279
280 if (bfd_stat (s->the_bfd, &st) != 0)
281 {
282 einfo (_("%P: %pB: bfd_stat failed: %E\n"), s->the_bfd);
283 return;
284 }
285
286 /* Some operating systems, e.g. Windows, do not provide a meaningful
287 st_ino; they always set it to zero. (Windows does provide a
288 meaningful st_dev.) Do not indicate a duplicate library in that
289 case. While there is no guarantee that a system that provides
290 meaningful inode numbers will never set st_ino to zero, this is
291 merely an optimization, so we do not need to worry about false
292 negatives. */
293 if (st.st_dev == global_stat.st_dev
294 && st.st_ino == global_stat.st_ino
295 && st.st_ino != 0)
296 {
297 global_found = s;
298 return;
299 }
300
301 /* We issue a warning if it looks like we are including two
302 different versions of the same shared library. For example,
303 there may be a problem if -lc picks up libc.so.6 but some other
304 shared library has a DT_NEEDED entry of libc.so.5. This is a
305 heuristic test, and it will only work if the name looks like
306 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
307 If we really want to issue warnings about mixing version numbers
308 of shared libraries, we need to find a better way. */
309
310 if (strchr (global_needed->name, '/') != NULL)
311 return;
312 suffix = strstr (global_needed->name, ".so.");
313 if (suffix == NULL)
314 return;
315 suffix += sizeof ".so." - 1;
316
317 soname = bfd_elf_get_dt_soname (s->the_bfd);
318 if (soname == NULL)
319 soname = lbasename (s->filename);
320
321 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
322 einfo (_("%P: warning: %s, needed by %pB, may conflict with %s\n"),
323 global_needed->name, global_needed->by, soname);
324 }
325
326 struct dt_needed
327 {
328 bfd *by;
329 const char *name;
330 };
331
332 /* This function is called for each possible name for a dynamic object
333 named by a DT_NEEDED entry. The FORCE parameter indicates whether
334 to skip the check for a conflicting version. */
335
336 static bfd_boolean
337 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
338 int force)
339 {
340 bfd *abfd;
341 const char *name = needed->name;
342 const char *soname;
343 int link_class;
344
345 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
346 if (abfd == NULL)
347 {
348 if (verbose)
349 info_msg (_("attempt to open %s failed\n"), name);
350 return FALSE;
351 }
352
353 /* Linker needs to decompress sections. */
354 abfd->flags |= BFD_DECOMPRESS;
355
356 if (! bfd_check_format (abfd, bfd_object))
357 {
358 bfd_close (abfd);
359 return FALSE;
360 }
361 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
362 {
363 bfd_close (abfd);
364 return FALSE;
365 }
366
367 /* For DT_NEEDED, they have to match. */
368 if (abfd->xvec != link_info.output_bfd->xvec)
369 {
370 bfd_close (abfd);
371 return FALSE;
372 }
373
374 /* Check whether this object would include any conflicting library
375 versions. If FORCE is set, then we skip this check; we use this
376 the second time around, if we couldn't find any compatible
377 instance of the shared library. */
378
379 if (! force)
380 {
381 struct bfd_link_needed_list *needs;
382
383 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
384 einfo (_("%F%P: %pB: bfd_elf_get_bfd_needed_list failed: %E\n"), abfd);
385
386 if (needs != NULL)
387 {
388 global_vercheck_needed = needs;
389 global_vercheck_failed = FALSE;
390 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
391 if (global_vercheck_failed)
392 {
393 bfd_close (abfd);
394 /* Return FALSE to force the caller to move on to try
395 another file on the search path. */
396 return FALSE;
397 }
398
399 /* But wait! It gets much worse. On Linux, if a shared
400 library does not use libc at all, we are supposed to skip
401 it the first time around in case we encounter a shared
402 library later on with the same name which does use the
403 version of libc that we want. This is much too horrible
404 to use on any system other than Linux. */
405
406 EOF
407 case ${target} in
408 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
409 fragment <<EOF
410 {
411 struct bfd_link_needed_list *l;
412
413 for (l = needs; l != NULL; l = l->next)
414 if (CONST_STRNEQ (l->name, "libc.so"))
415 break;
416 if (l == NULL)
417 {
418 bfd_close (abfd);
419 return FALSE;
420 }
421 }
422
423 EOF
424 ;;
425 esac
426 fragment <<EOF
427 }
428 }
429
430 /* We've found a dynamic object matching the DT_NEEDED entry. */
431
432 /* We have already checked that there is no other input file of the
433 same name. We must now check again that we are not including the
434 same file twice. We need to do this because on many systems
435 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
436 reference libc.so.1. If we have already included libc.so, we
437 don't want to include libc.so.1 if they are the same file, and we
438 can only check that using stat. */
439
440 if (bfd_stat (abfd, &global_stat) != 0)
441 einfo (_("%F%P: %pB: bfd_stat failed: %E\n"), abfd);
442
443 /* First strip off everything before the last '/'. */
444 soname = lbasename (abfd->filename);
445
446 if (verbose)
447 info_msg (_("found %s at %s\n"), soname, name);
448
449 global_found = NULL;
450 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
451 if (global_found != NULL)
452 {
453 /* Return TRUE to indicate that we found the file, even though
454 we aren't going to do anything with it. */
455 return TRUE;
456 }
457
458 /* Specify the soname to use. */
459 bfd_elf_set_dt_needed_name (abfd, soname);
460
461 /* Tell the ELF linker that we don't want the output file to have a
462 DT_NEEDED entry for this file, unless it is used to resolve
463 references in a regular object. */
464 link_class = DYN_DT_NEEDED;
465
466 /* Tell the ELF linker that we don't want the output file to have a
467 DT_NEEDED entry for this file at all if the entry is from a file
468 with DYN_NO_ADD_NEEDED. */
469 if (needed->by != NULL
470 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
471 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
472
473 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
474
475 /* Add this file into the symbol table. */
476 if (! bfd_link_add_symbols (abfd, &link_info))
477 einfo (_("%F%P: %pB: error adding symbols: %E\n"), abfd);
478
479 return TRUE;
480 }
481
482 /* Search for a needed file in a path. */
483
484 static bfd_boolean
485 gld${EMULATION_NAME}_search_needed (const char *path,
486 struct dt_needed *n, int force)
487 {
488 const char *s;
489 const char *name = n->name;
490 size_t len;
491 struct dt_needed needed;
492
493 if (name[0] == '/')
494 return gld${EMULATION_NAME}_try_needed (n, force);
495
496 if (path == NULL || *path == '\0')
497 return FALSE;
498
499 needed.by = n->by;
500 needed.name = n->name;
501
502 len = strlen (name);
503 while (1)
504 {
505 unsigned offset = 0;
506 char * var;
507 char *filename, *sset;
508
509 s = strchr (path, config.rpath_separator);
510 if (s == NULL)
511 s = path + strlen (path);
512
513 #if HAVE_DOS_BASED_FILE_SYSTEM
514 /* Assume a match on the second char is part of drive specifier. */
515 else if (config.rpath_separator == ':'
516 && s == path + 1
517 && ISALPHA (*path))
518 {
519 s = strchr (s + 1, config.rpath_separator);
520 if (s == NULL)
521 s = path + strlen (path);
522 }
523 #endif
524 filename = (char *) xmalloc (s - path + len + 2);
525 if (s == path)
526 sset = filename;
527 else
528 {
529 memcpy (filename, path, s - path);
530 filename[s - path] = '/';
531 sset = filename + (s - path) + 1;
532 }
533 strcpy (sset, name);
534
535 /* PR 20535: Support the same pseudo-environment variables that
536 are supported by ld.so. Namely, $ORIGIN, $LIB and $PLATFORM.
537 Since there can be more than one occurrence of these tokens in
538 the path we loop until no more are found. Since we might not
539 be able to substitute some of the tokens we maintain an offset
540 into the filename for where we should begin our scan. */
541 while ((var = strchr (filename + offset, '$')) != NULL)
542 {
543 /* The ld.so manual page does not say, but I am going to assume that
544 these tokens are terminated by a directory separator character
545 (/) or the end of the string. There is also an implication that
546 $ORIGIN should only be used at the start of a path, but that is
547 not enforced here.
548
549 The ld.so manual page also states that it allows ${ORIGIN},
550 ${LIB} and ${PLATFORM}, so these are supported as well.
551
552 FIXME: The code could be a lot cleverer about allocating space
553 for the processed string. */
554 char * end = strchr (var, '/');
555 char * replacement = NULL;
556 char * v = var + 1;
557 char * freeme = NULL;
558 unsigned flen = strlen (filename);
559
560 if (end != NULL)
561 /* Temporarily terminate the filename at the end of the token. */
562 * end = 0;
563
564 if (*v == '{')
565 ++ v;
566 switch (*v++)
567 {
568 case 'O':
569 if (strcmp (v, "RIGIN") == 0 || strcmp (v, "RIGIN}") == 0)
570 {
571 /* ORIGIN - replace with the full path to the directory
572 containing the program or shared object. */
573 if (needed.by == NULL)
574 {
575 if (link_info.output_bfd == NULL)
576 {
577 break;
578 }
579 else
580 replacement = bfd_get_filename (link_info.output_bfd);
581 }
582 else
583 replacement = bfd_get_filename (needed.by);
584
585 if (replacement)
586 {
587 char * slash;
588
589 if (replacement[0] == '/')
590 freeme = xstrdup (replacement);
591 else
592 {
593 char * current_dir = getpwd ();
594
595 freeme = xmalloc (strlen (replacement) + strlen (current_dir) + 2);
596 sprintf (freeme, "%s/%s", current_dir, replacement);
597 }
598
599 replacement = freeme;
600 if ((slash = strrchr (replacement, '/')) != NULL)
601 * slash = 0;
602 }
603 }
604 break;
605
606 case 'L':
607 if (strcmp (v, "IB") == 0 || strcmp (v, "IB}") == 0)
608 {
609 /* LIB - replace with "lib" in 32-bit environments
610 and "lib64" in 64-bit environments. */
611
612 /* Note - we could replace this switch statement by
613 conditional fragments of shell script, but that is messy.
614 Any compiler worth its salt is going to optimize away
615 all but one of these case statements anyway. */
616 switch ($ELFSIZE)
617 {
618 case 32: replacement = "lib"; break;
619 case 64: replacement = "lib64"; break;
620 default:
621 /* $ELFSIZE is not 32 or 64 ... */
622 abort ();
623 }
624 }
625 break;
626
627 case 'P':
628 /* Supporting $PLATFORM in a cross-hosted environment is not
629 possible. Supporting it in a native environment involves
630 loading the <sys/auxv.h> header file which loads the
631 system <elf.h> header file, which conflicts with the
632 "include/elf/mips.h" header file. */
633 /* Fall through. */
634 default:
635 break;
636 }
637
638 if (replacement)
639 {
640 char * filename2 = xmalloc (flen + strlen (replacement));
641
642 if (end)
643 {
644 sprintf (filename2, "%.*s%s/%s",
645 (int)(var - filename), filename,
646 replacement, end + 1);
647 offset = (var - filename) + 1 + strlen (replacement);
648 }
649 else
650 {
651 sprintf (filename2, "%.*s%s",
652 (int)(var - filename), filename,
653 replacement);
654 offset = var - filename + strlen (replacement);
655 }
656
657 free (filename);
658 filename = filename2;
659 /* There is no need to restore the path separator (when
660 end != NULL) as we have replaced the entire string. */
661 }
662 else
663 {
664 if (verbose)
665 /* We only issue an "unrecognised" message in verbose mode
666 as the $<foo> token might be a legitimate component of
667 a path name in the target's file system. */
668 info_msg (_("unrecognised or unsupported token '%s' in search path\n"), var);
669
670 if (end)
671 /* Restore the path separator. */
672 * end = '/';
673
674 /* PR 20784: Make sure that we resume the scan *after*
675 the token that we could not replace. */
676 offset = (var + 1) - filename;
677 }
678
679 free (freeme);
680 }
681
682 needed.name = filename;
683
684 if (gld${EMULATION_NAME}_try_needed (&needed, force))
685 return TRUE;
686
687 free (filename);
688
689 if (*s == '\0')
690 break;
691 path = s + 1;
692 }
693
694 return FALSE;
695 }
696
697 EOF
698 if [ "x${USE_LIBPATH}" = xyes ] ; then
699 fragment <<EOF
700
701 /* Prefix the sysroot to absolute paths in PATH, a string containing
702 paths separated by config.rpath_separator. If running on a DOS
703 file system, paths containing a drive spec won't have the sysroot
704 prefix added, unless the sysroot also specifies the same drive. */
705
706 static const char *
707 gld${EMULATION_NAME}_add_sysroot (const char *path)
708 {
709 size_t len, extra;
710 const char *p;
711 char *ret, *q;
712 int dos_drive_sysroot = HAS_DRIVE_SPEC (ld_sysroot);
713
714 len = strlen (ld_sysroot);
715 for (extra = 0, p = path; ; )
716 {
717 int dos_drive = HAS_DRIVE_SPEC (p);
718
719 if (dos_drive)
720 p += 2;
721 if (IS_DIR_SEPARATOR (*p)
722 && (!dos_drive
723 || (dos_drive_sysroot
724 && ld_sysroot[0] == p[-2])))
725 {
726 if (dos_drive && dos_drive_sysroot)
727 extra += len - 2;
728 else
729 extra += len;
730 }
731 p = strchr (p, config.rpath_separator);
732 if (!p)
733 break;
734 ++p;
735 }
736
737 ret = xmalloc (strlen (path) + extra + 1);
738
739 for (q = ret, p = path; ; )
740 {
741 const char *end;
742 int dos_drive = HAS_DRIVE_SPEC (p);
743
744 if (dos_drive)
745 {
746 *q++ = *p++;
747 *q++ = *p++;
748 }
749 if (IS_DIR_SEPARATOR (*p)
750 && (!dos_drive
751 || (dos_drive_sysroot
752 && ld_sysroot[0] == p[-2])))
753 {
754 if (dos_drive && dos_drive_sysroot)
755 {
756 strcpy (q, ld_sysroot + 2);
757 q += len - 2;
758 }
759 else
760 {
761 strcpy (q, ld_sysroot);
762 q += len;
763 }
764 }
765 end = strchr (p, config.rpath_separator);
766 if (end)
767 {
768 size_t n = end - p + 1;
769 strncpy (q, p, n);
770 q += n;
771 p += n;
772 }
773 else
774 {
775 strcpy (q, p);
776 break;
777 }
778 }
779
780 return ret;
781 }
782
783 EOF
784 case ${target} in
785 *-*-freebsd* | *-*-dragonfly*)
786 fragment <<EOF
787 /* Read the system search path the FreeBSD way rather than the Linux way. */
788 #ifdef HAVE_ELF_HINTS_H
789 #include <elf-hints.h>
790 #else
791 #include "elf-hints-local.h"
792 #endif
793
794 static bfd_boolean
795 gld${EMULATION_NAME}_check_ld_elf_hints (const struct bfd_link_needed_list *l,
796 int force)
797 {
798 static bfd_boolean initialized;
799 static const char *ld_elf_hints;
800 struct dt_needed needed;
801
802 if (!initialized)
803 {
804 FILE *f;
805 char *tmppath;
806
807 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
808 f = fopen (tmppath, FOPEN_RB);
809 free (tmppath);
810 if (f != NULL)
811 {
812 struct elfhints_hdr hdr;
813
814 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
815 && hdr.magic == ELFHINTS_MAGIC
816 && hdr.version == 1)
817 {
818 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
819 {
820 char *b;
821
822 b = xmalloc (hdr.dirlistlen + 1);
823 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
824 hdr.dirlistlen + 1)
825 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
826
827 free (b);
828 }
829 }
830 fclose (f);
831 }
832
833 initialized = TRUE;
834 }
835
836 if (ld_elf_hints == NULL)
837 return FALSE;
838
839 needed.by = l->by;
840 needed.name = l->name;
841 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, &needed, force);
842 }
843 EOF
844 # FreeBSD
845 ;;
846
847 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
848 fragment <<EOF
849 /* For a native linker, check the file /etc/ld.so.conf for directories
850 in which we may find shared libraries. /etc/ld.so.conf is really
851 only meaningful on Linux. */
852
853 struct gld${EMULATION_NAME}_ld_so_conf
854 {
855 char *path;
856 size_t len, alloc;
857 };
858
859 static bfd_boolean
860 gld${EMULATION_NAME}_parse_ld_so_conf
861 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
862
863 static void
864 gld${EMULATION_NAME}_parse_ld_so_conf_include
865 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
866 const char *pattern)
867 {
868 char *newp = NULL;
869 #ifdef HAVE_GLOB
870 glob_t gl;
871 #endif
872
873 if (pattern[0] != '/')
874 {
875 char *p = strrchr (filename, '/');
876 size_t patlen = strlen (pattern) + 1;
877
878 newp = xmalloc (p - filename + 1 + patlen);
879 memcpy (newp, filename, p - filename + 1);
880 memcpy (newp + (p - filename + 1), pattern, patlen);
881 pattern = newp;
882 }
883
884 #ifdef HAVE_GLOB
885 if (glob (pattern, 0, NULL, &gl) == 0)
886 {
887 size_t i;
888
889 for (i = 0; i < gl.gl_pathc; ++i)
890 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
891 globfree (&gl);
892 }
893 #else
894 /* If we do not have glob, treat the pattern as a literal filename. */
895 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
896 #endif
897
898 if (newp)
899 free (newp);
900 }
901
902 static bfd_boolean
903 gld${EMULATION_NAME}_parse_ld_so_conf
904 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
905 {
906 FILE *f = fopen (filename, FOPEN_RT);
907 char *line;
908 size_t linelen;
909
910 if (f == NULL)
911 return FALSE;
912
913 linelen = 256;
914 line = xmalloc (linelen);
915 do
916 {
917 char *p = line, *q;
918
919 /* Normally this would use getline(3), but we need to be portable. */
920 while ((q = fgets (p, linelen - (p - line), f)) != NULL
921 && strlen (q) == linelen - (p - line) - 1
922 && line[linelen - 2] != '\n')
923 {
924 line = xrealloc (line, 2 * linelen);
925 p = line + linelen - 1;
926 linelen += linelen;
927 }
928
929 if (q == NULL && p == line)
930 break;
931
932 p = strchr (line, '\n');
933 if (p)
934 *p = '\0';
935
936 /* Because the file format does not know any form of quoting we
937 can search forward for the next '#' character and if found
938 make it terminating the line. */
939 p = strchr (line, '#');
940 if (p)
941 *p = '\0';
942
943 /* Remove leading whitespace. NUL is no whitespace character. */
944 p = line;
945 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
946 ++p;
947
948 /* If the line is blank it is ignored. */
949 if (p[0] == '\0')
950 continue;
951
952 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
953 {
954 char *dir, c;
955 p += 8;
956 do
957 {
958 while (*p == ' ' || *p == '\t')
959 ++p;
960
961 if (*p == '\0')
962 break;
963
964 dir = p;
965
966 while (*p != ' ' && *p != '\t' && *p)
967 ++p;
968
969 c = *p;
970 *p++ = '\0';
971 if (dir[0] != '\0')
972 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
973 dir);
974 }
975 while (c != '\0');
976 }
977 else
978 {
979 char *dir = p;
980 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
981 && *p != '\r' && *p != '\v')
982 ++p;
983
984 while (p != dir && p[-1] == '/')
985 --p;
986 if (info->path == NULL)
987 {
988 info->alloc = p - dir + 1 + 256;
989 info->path = xmalloc (info->alloc);
990 info->len = 0;
991 }
992 else
993 {
994 if (info->len + 1 + (p - dir) >= info->alloc)
995 {
996 info->alloc += p - dir + 256;
997 info->path = xrealloc (info->path, info->alloc);
998 }
999 info->path[info->len++] = config.rpath_separator;
1000 }
1001 memcpy (info->path + info->len, dir, p - dir);
1002 info->len += p - dir;
1003 info->path[info->len] = '\0';
1004 }
1005 }
1006 while (! feof (f));
1007 free (line);
1008 fclose (f);
1009 return TRUE;
1010 }
1011
1012 static bfd_boolean
1013 gld${EMULATION_NAME}_check_ld_so_conf (const struct bfd_link_needed_list *l,
1014 int force)
1015 {
1016 static bfd_boolean initialized;
1017 static const char *ld_so_conf;
1018 struct dt_needed needed;
1019
1020 if (! initialized)
1021 {
1022 char *tmppath;
1023 struct gld${EMULATION_NAME}_ld_so_conf info;
1024
1025 info.path = NULL;
1026 info.len = info.alloc = 0;
1027 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
1028 (const char *) NULL);
1029 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
1030 {
1031 free (tmppath);
1032 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
1033 (const char *) NULL);
1034 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
1035 }
1036 free (tmppath);
1037
1038 if (info.path)
1039 {
1040 ld_so_conf = gld${EMULATION_NAME}_add_sysroot (info.path);
1041 free (info.path);
1042 }
1043 initialized = TRUE;
1044 }
1045
1046 if (ld_so_conf == NULL)
1047 return FALSE;
1048
1049
1050 needed.by = l->by;
1051 needed.name = l->name;
1052 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
1053 }
1054
1055 EOF
1056 # Linux
1057 ;;
1058 esac
1059 fi
1060 fragment <<EOF
1061
1062 /* See if an input file matches a DT_NEEDED entry by name. */
1063
1064 static void
1065 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
1066 {
1067 const char *soname;
1068
1069 /* Stop looking if we've found a loaded lib. */
1070 if (global_found != NULL
1071 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1072 & DYN_AS_NEEDED) == 0)
1073 return;
1074
1075 if (s->filename == NULL || s->the_bfd == NULL)
1076 return;
1077
1078 /* Don't look for a second non-loaded as-needed lib. */
1079 if (global_found != NULL
1080 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
1081 return;
1082
1083 if (filename_cmp (s->filename, global_needed->name) == 0)
1084 {
1085 global_found = s;
1086 return;
1087 }
1088
1089 if (s->flags.search_dirs)
1090 {
1091 const char *f = strrchr (s->filename, '/');
1092 if (f != NULL
1093 && filename_cmp (f + 1, global_needed->name) == 0)
1094 {
1095 global_found = s;
1096 return;
1097 }
1098 }
1099
1100 soname = bfd_elf_get_dt_soname (s->the_bfd);
1101 if (soname != NULL
1102 && filename_cmp (soname, global_needed->name) == 0)
1103 {
1104 global_found = s;
1105 return;
1106 }
1107 }
1108
1109 EOF
1110
1111 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
1112 fragment <<EOF
1113
1114 static bfd_size_type
1115 id_note_section_size (bfd *abfd ATTRIBUTE_UNUSED)
1116 {
1117 const char *style = emit_note_gnu_build_id;
1118 bfd_size_type size;
1119 bfd_size_type build_id_size;
1120
1121 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
1122 size = (size + 3) & -(bfd_size_type) 4;
1123
1124 build_id_size = compute_build_id_size (style);
1125 if (build_id_size)
1126 size += build_id_size;
1127 else
1128 size = 0;
1129
1130 return size;
1131 }
1132
1133 static bfd_boolean
1134 write_build_id (bfd *abfd)
1135 {
1136 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1137 struct elf_obj_tdata *t = elf_tdata (abfd);
1138 const char *style;
1139 asection *asec;
1140 Elf_Internal_Shdr *i_shdr;
1141 unsigned char *contents, *id_bits;
1142 bfd_size_type size;
1143 file_ptr position;
1144 Elf_External_Note *e_note;
1145
1146 style = t->o->build_id.style;
1147 asec = t->o->build_id.sec;
1148 if (bfd_is_abs_section (asec->output_section))
1149 {
1150 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
1151 " --build-id ignored\n"));
1152 return TRUE;
1153 }
1154 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
1155
1156 if (i_shdr->contents == NULL)
1157 {
1158 if (asec->contents == NULL)
1159 asec->contents = (unsigned char *) xmalloc (asec->size);
1160 contents = asec->contents;
1161 }
1162 else
1163 contents = i_shdr->contents + asec->output_offset;
1164
1165 e_note = (Elf_External_Note *) contents;
1166 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
1167 size = (size + 3) & -(bfd_size_type) 4;
1168 id_bits = contents + size;
1169 size = asec->size - size;
1170
1171 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
1172 bfd_h_put_32 (abfd, size, &e_note->descsz);
1173 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
1174 memcpy (e_note->name, "GNU", sizeof "GNU");
1175
1176 generate_build_id (abfd, style, bed->s->checksum_contents, id_bits, size);
1177
1178 position = i_shdr->sh_offset + asec->output_offset;
1179 size = asec->size;
1180 return (bfd_seek (abfd, position, SEEK_SET) == 0
1181 && bfd_bwrite (contents, size, abfd) == size);
1182 }
1183
1184 /* Make .note.gnu.build-id section, and set up elf_tdata->build_id. */
1185
1186 static bfd_boolean
1187 setup_build_id (bfd *ibfd)
1188 {
1189 asection *s;
1190 bfd_size_type size;
1191 flagword flags;
1192
1193 size = id_note_section_size (ibfd);
1194 if (size == 0)
1195 {
1196 einfo (_("%P: warning: unrecognized --build-id style ignored\n"));
1197 return FALSE;
1198 }
1199
1200 flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
1201 | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
1202 s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags);
1203 if (s != NULL && bfd_set_section_alignment (ibfd, s, 2))
1204 {
1205 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1206 t->o->build_id.after_write_object_contents = &write_build_id;
1207 t->o->build_id.style = emit_note_gnu_build_id;
1208 t->o->build_id.sec = s;
1209 elf_section_type (s) = SHT_NOTE;
1210 s->size = size;
1211 return TRUE;
1212 }
1213
1214 einfo (_("%P: warning: cannot create .note.gnu.build-id section,"
1215 " --build-id ignored\n"));
1216 return FALSE;
1217 }
1218
1219 /* This is called after all the input files have been opened. */
1220
1221 static void
1222 gld${EMULATION_NAME}_after_open (void)
1223 {
1224 struct bfd_link_needed_list *needed, *l;
1225 struct elf_link_hash_table *htab;
1226 asection *s;
1227 bfd *abfd;
1228
1229 after_open_default ();
1230
1231 htab = elf_hash_table (&link_info);
1232 if (!is_elf_hash_table (htab))
1233 return;
1234
1235 if (command_line.out_implib_filename)
1236 {
1237 unlink_if_ordinary (command_line.out_implib_filename);
1238 link_info.out_implib_bfd
1239 = bfd_openw (command_line.out_implib_filename,
1240 bfd_get_target (link_info.output_bfd));
1241
1242 if (link_info.out_implib_bfd == NULL)
1243 {
1244 einfo (_("%F%P: %s: can't open for writing: %E\n"),
1245 command_line.out_implib_filename);
1246 }
1247 }
1248
1249 if (emit_note_gnu_build_id != NULL)
1250 {
1251 /* Find an ELF input. */
1252 for (abfd = link_info.input_bfds;
1253 abfd != (bfd *) NULL; abfd = abfd->link.next)
1254 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1255 && bfd_count_sections (abfd) != 0
1256 && !((lang_input_statement_type *) abfd->usrdata)->flags.just_syms)
1257 break;
1258
1259 /* PR 10555: If there are no ELF input files do not try to
1260 create a .note.gnu-build-id section. */
1261 if (abfd == NULL
1262 || !setup_build_id (abfd))
1263 {
1264 free ((char *) emit_note_gnu_build_id);
1265 emit_note_gnu_build_id = NULL;
1266 }
1267 }
1268
1269 get_elf_backend_data (link_info.output_bfd)->setup_gnu_properties (&link_info);
1270
1271 if (bfd_link_relocatable (&link_info))
1272 {
1273 if (link_info.execstack == ! link_info.noexecstack)
1274 /* PR ld/16744: If "-z [no]execstack" has been specified on the
1275 command line and we are perfoming a relocatable link then no
1276 PT_GNU_STACK segment will be created and so the
1277 linkinfo.[no]execstack values set in _handle_option() will have no
1278 effect. Instead we create a .note.GNU-stack section in much the
1279 same way as the assembler does with its --[no]execstack option. */
1280 (void) bfd_make_section_with_flags (link_info.input_bfds,
1281 ".note.GNU-stack",
1282 SEC_READONLY | (link_info.execstack ? SEC_CODE : 0));
1283
1284 return;
1285 }
1286
1287 if (!link_info.traditional_format)
1288 {
1289 bfd *elfbfd = NULL;
1290 bfd_boolean warn_eh_frame = FALSE;
1291 int seen_type = 0;
1292
1293 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1294 {
1295 int type = 0;
1296
1297 if (((lang_input_statement_type *) abfd->usrdata)->flags.just_syms)
1298 continue;
1299
1300 for (s = abfd->sections; s && type < COMPACT_EH_HDR; s = s->next)
1301 {
1302 const char *name = bfd_get_section_name (abfd, s);
1303
1304 if (bfd_is_abs_section (s->output_section))
1305 continue;
1306 if (CONST_STRNEQ (name, ".eh_frame_entry"))
1307 type = COMPACT_EH_HDR;
1308 else if (strcmp (name, ".eh_frame") == 0 && s->size > 8)
1309 type = DWARF2_EH_HDR;
1310 }
1311
1312 if (type != 0)
1313 {
1314 if (seen_type == 0)
1315 {
1316 seen_type = type;
1317 }
1318 else if (seen_type != type)
1319 {
1320 einfo (_("%F%P: compact frame descriptions incompatible with"
1321 " DWARF2 .eh_frame from %pB\n"),
1322 type == DWARF2_EH_HDR ? abfd : elfbfd);
1323 break;
1324 }
1325
1326 if (!elfbfd
1327 && (type == COMPACT_EH_HDR || link_info.eh_frame_hdr_type != 0))
1328 {
1329 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1330 elfbfd = abfd;
1331
1332 warn_eh_frame = TRUE;
1333 }
1334 }
1335
1336 if (seen_type == COMPACT_EH_HDR)
1337 link_info.eh_frame_hdr_type = COMPACT_EH_HDR;
1338 }
1339 if (elfbfd)
1340 {
1341 const struct elf_backend_data *bed;
1342
1343 bed = get_elf_backend_data (elfbfd);
1344 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1345 bed->dynamic_sec_flags
1346 | SEC_READONLY);
1347 if (s != NULL
1348 && bfd_set_section_alignment (elfbfd, s, 2))
1349 {
1350 htab->eh_info.hdr_sec = s;
1351 warn_eh_frame = FALSE;
1352 }
1353 }
1354 if (warn_eh_frame)
1355 einfo (_("%P: warning: cannot create .eh_frame_hdr section,"
1356 " --eh-frame-hdr ignored\n"));
1357 }
1358
1359 /* Get the list of files which appear in DT_NEEDED entries in
1360 dynamic objects included in the link (often there will be none).
1361 For each such file, we want to track down the corresponding
1362 library, and include the symbol table in the link. This is what
1363 the runtime dynamic linker will do. Tracking the files down here
1364 permits one dynamic object to include another without requiring
1365 special action by the person doing the link. Note that the
1366 needed list can actually grow while we are stepping through this
1367 loop. */
1368 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1369 for (l = needed; l != NULL; l = l->next)
1370 {
1371 struct bfd_link_needed_list *ll;
1372 struct dt_needed n, nn;
1373 int force;
1374
1375 /* If the lib that needs this one was --as-needed and wasn't
1376 found to be needed, then this lib isn't needed either. */
1377 if (l->by != NULL
1378 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1379 continue;
1380
1381 /* Skip the lib if --no-copy-dt-needed-entries and
1382 --allow-shlib-undefined is in effect. */
1383 if (l->by != NULL
1384 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1385 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1386 continue;
1387
1388 /* If we've already seen this file, skip it. */
1389 for (ll = needed; ll != l; ll = ll->next)
1390 if ((ll->by == NULL
1391 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1392 && strcmp (ll->name, l->name) == 0)
1393 break;
1394 if (ll != l)
1395 continue;
1396
1397 /* See if this file was included in the link explicitly. */
1398 global_needed = l;
1399 global_found = NULL;
1400 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1401 if (global_found != NULL
1402 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1403 & DYN_AS_NEEDED) == 0)
1404 continue;
1405
1406 n.by = l->by;
1407 n.name = l->name;
1408 nn.by = l->by;
1409 if (verbose)
1410 info_msg (_("%s needed by %pB\n"), l->name, l->by);
1411
1412 /* As-needed libs specified on the command line (or linker script)
1413 take priority over libs found in search dirs. */
1414 if (global_found != NULL)
1415 {
1416 nn.name = global_found->filename;
1417 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1418 continue;
1419 }
1420
1421 /* We need to find this file and include the symbol table. We
1422 want to search for the file in the same way that the dynamic
1423 linker will search. That means that we want to use
1424 rpath_link, rpath, then the environment variable
1425 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1426 entries (native only), then the linker script LIB_SEARCH_DIRS.
1427 We do not search using the -L arguments.
1428
1429 We search twice. The first time, we skip objects which may
1430 introduce version mismatches. The second time, we force
1431 their use. See gld${EMULATION_NAME}_vercheck comment. */
1432 for (force = 0; force < 2; force++)
1433 {
1434 size_t len;
1435 search_dirs_type *search;
1436 EOF
1437 if [ "x${NATIVE}" = xyes ] || [ "x${USE_LIBPATH}" = xyes ] ; then
1438 fragment <<EOF
1439 const char *path;
1440 EOF
1441 fi
1442 if [ "x${USE_LIBPATH}" = xyes ] ; then
1443 fragment <<EOF
1444 struct bfd_link_needed_list *rp;
1445 int found;
1446 EOF
1447 fi
1448 fragment <<EOF
1449
1450 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1451 &n, force))
1452 break;
1453 EOF
1454 if [ "x${USE_LIBPATH}" = xyes ] ; then
1455 fragment <<EOF
1456 path = command_line.rpath;
1457 if (path)
1458 {
1459 path = gld${EMULATION_NAME}_add_sysroot (path);
1460 found = gld${EMULATION_NAME}_search_needed (path, &n, force);
1461 free ((char *) path);
1462 if (found)
1463 break;
1464 }
1465 EOF
1466 fi
1467 if [ "x${NATIVE}" = xyes ] ; then
1468 fragment <<EOF
1469 if (command_line.rpath_link == NULL
1470 && command_line.rpath == NULL)
1471 {
1472 path = (const char *) getenv ("LD_RUN_PATH");
1473 if (path
1474 && gld${EMULATION_NAME}_search_needed (path, &n, force))
1475 break;
1476 }
1477 path = (const char *) getenv ("LD_LIBRARY_PATH");
1478 if (path
1479 && gld${EMULATION_NAME}_search_needed (path, &n, force))
1480 break;
1481 EOF
1482 fi
1483 if [ "x${USE_LIBPATH}" = xyes ] ; then
1484 fragment <<EOF
1485 found = 0;
1486 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1487 for (; !found && rp != NULL; rp = rp->next)
1488 {
1489 path = gld${EMULATION_NAME}_add_sysroot (rp->name);
1490 found = (rp->by == l->by
1491 && gld${EMULATION_NAME}_search_needed (path, &n,
1492 force));
1493 free ((char *) path);
1494 }
1495 if (found)
1496 break;
1497
1498 EOF
1499 fi
1500 if [ "x${USE_LIBPATH}" = xyes ] ; then
1501 case ${target} in
1502 *-*-freebsd* | *-*-dragonfly*)
1503 fragment <<EOF
1504 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1505 break;
1506 EOF
1507 # FreeBSD
1508 ;;
1509
1510 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1511 fragment <<EOF
1512 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1513 break;
1514
1515 EOF
1516 # Linux
1517 ;;
1518 esac
1519 fi
1520 fragment <<EOF
1521 len = strlen (l->name);
1522 for (search = search_head; search != NULL; search = search->next)
1523 {
1524 char *filename;
1525
1526 if (search->cmdline)
1527 continue;
1528 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1529 sprintf (filename, "%s/%s", search->name, l->name);
1530 nn.name = filename;
1531 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1532 break;
1533 free (filename);
1534 }
1535 if (search != NULL)
1536 break;
1537 EOF
1538 fragment <<EOF
1539 }
1540
1541 if (force < 2)
1542 continue;
1543
1544 einfo (_("%P: warning: %s, needed by %pB, not found "
1545 "(try using -rpath or -rpath-link)\n"),
1546 l->name, l->by);
1547 }
1548
1549 if (link_info.eh_frame_hdr_type == COMPACT_EH_HDR)
1550 if (!bfd_elf_parse_eh_frame_entries (NULL, &link_info))
1551 einfo (_("%F%P: failed to parse EH frame entries\n"));
1552 }
1553
1554 EOF
1555 fi
1556
1557 fragment <<EOF
1558
1559 /* Look through an expression for an assignment statement. */
1560
1561 static void
1562 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1563 {
1564 bfd_boolean provide = FALSE;
1565
1566 switch (exp->type.node_class)
1567 {
1568 case etree_provide:
1569 case etree_provided:
1570 provide = TRUE;
1571 /* Fallthru */
1572 case etree_assign:
1573 /* We call record_link_assignment even if the symbol is defined.
1574 This is because if it is defined by a dynamic object, we
1575 actually want to use the value defined by the linker script,
1576 not the value from the dynamic object (because we are setting
1577 symbols like etext). If the symbol is defined by a regular
1578 object, then, as it happens, calling record_link_assignment
1579 will do no harm. */
1580 if (strcmp (exp->assign.dst, ".") != 0)
1581 {
1582 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1583 &link_info,
1584 exp->assign.dst, provide,
1585 exp->assign.hidden))
1586 einfo (_("%F%P: failed to record assignment to %s: %E\n"),
1587 exp->assign.dst);
1588 }
1589 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1590 break;
1591
1592 case etree_binary:
1593 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1594 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1595 break;
1596
1597 case etree_trinary:
1598 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1599 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1600 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1601 break;
1602
1603 case etree_unary:
1604 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1605 break;
1606
1607 default:
1608 break;
1609 }
1610 }
1611
1612
1613 /* This is called by the before_allocation routine via
1614 lang_for_each_statement. It locates any assignment statements, and
1615 tells the ELF backend about them, in case they are assignments to
1616 symbols which are referred to by dynamic objects. */
1617
1618 static void
1619 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1620 {
1621 if (s->header.type == lang_assignment_statement_enum)
1622 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1623 }
1624
1625 EOF
1626
1627 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1628 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1629 ELF_INTERPRETER_SET_DEFAULT="
1630 if (sinterp != NULL)
1631 {
1632 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1633 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1634 }
1635
1636 "
1637 else
1638 ELF_INTERPRETER_SET_DEFAULT=
1639 fi
1640 fragment <<EOF
1641
1642 /* used by before_allocation and handle_option. */
1643 static void
1644 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1645 {
1646 if (*to == NULL)
1647 *to = xstrdup (op_arg);
1648 else
1649 {
1650 size_t to_len = strlen (*to);
1651 size_t op_arg_len = strlen (op_arg);
1652 char *buf;
1653 char *cp = *to;
1654
1655 /* First see whether OPTARG is already in the path. */
1656 do
1657 {
1658 if (strncmp (op_arg, cp, op_arg_len) == 0
1659 && (cp[op_arg_len] == 0
1660 || cp[op_arg_len] == config.rpath_separator))
1661 /* We found it. */
1662 break;
1663
1664 /* Not yet found. */
1665 cp = strchr (cp, config.rpath_separator);
1666 if (cp != NULL)
1667 ++cp;
1668 }
1669 while (cp != NULL);
1670
1671 if (cp == NULL)
1672 {
1673 buf = xmalloc (to_len + op_arg_len + 2);
1674 sprintf (buf, "%s%c%s", *to,
1675 config.rpath_separator, op_arg);
1676 free (*to);
1677 *to = buf;
1678 }
1679 }
1680 }
1681
1682 /* This is called after the sections have been attached to output
1683 sections, but before any sizes or addresses have been set. */
1684
1685 static void
1686 gld${EMULATION_NAME}_before_allocation (void)
1687 {
1688 const char *rpath;
1689 asection *sinterp;
1690 bfd *abfd;
1691 struct bfd_link_hash_entry *ehdr_start = NULL;
1692 unsigned char ehdr_start_save_type = 0;
1693 char ehdr_start_save_u[sizeof ehdr_start->u
1694 - sizeof ehdr_start->u.def.next] = "";
1695
1696 if (is_elf_hash_table (link_info.hash))
1697 {
1698 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1699
1700 /* Make __ehdr_start hidden if it has been referenced, to
1701 prevent the symbol from being dynamic. */
1702 if (!bfd_link_relocatable (&link_info))
1703 {
1704 struct elf_link_hash_table *htab = elf_hash_table (&link_info);
1705 struct elf_link_hash_entry *h
1706 = elf_link_hash_lookup (htab, "__ehdr_start", FALSE, FALSE, TRUE);
1707
1708 /* Only adjust the export class if the symbol was referenced
1709 and not defined, otherwise leave it alone. */
1710 if (h != NULL
1711 && (h->root.type == bfd_link_hash_new
1712 || h->root.type == bfd_link_hash_undefined
1713 || h->root.type == bfd_link_hash_undefweak
1714 || h->root.type == bfd_link_hash_common))
1715 {
1716 const struct elf_backend_data *bed;
1717 bed = get_elf_backend_data (link_info.output_bfd);
1718 (*bed->elf_backend_hide_symbol) (&link_info, h, TRUE);
1719 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
1720 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
1721 /* Don't leave the symbol undefined. Undefined hidden
1722 symbols typically won't have dynamic relocations, but
1723 we most likely will need dynamic relocations for
1724 __ehdr_start if we are building a PIE or shared
1725 library. */
1726 ehdr_start = &h->root;
1727 ehdr_start_save_type = ehdr_start->type;
1728 memcpy (ehdr_start_save_u,
1729 (char *) &ehdr_start->u + sizeof ehdr_start->u.def.next,
1730 sizeof ehdr_start_save_u);
1731 ehdr_start->type = bfd_link_hash_defined;
1732 ehdr_start->u.def.section = bfd_abs_section_ptr;
1733 ehdr_start->u.def.value = 0;
1734 }
1735 }
1736
1737 /* If we are going to make any variable assignments, we need to
1738 let the ELF backend know about them in case the variables are
1739 referred to by dynamic objects. */
1740 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1741 }
1742
1743 /* Let the ELF backend work out the sizes of any sections required
1744 by dynamic linking. */
1745 rpath = command_line.rpath;
1746 if (rpath == NULL)
1747 rpath = (const char *) getenv ("LD_RUN_PATH");
1748
1749 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1750 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1751 {
1752 const char *audit_libs = elf_dt_audit (abfd);
1753
1754 /* If the input bfd contains an audit entry, we need to add it as
1755 a dep audit entry. */
1756 if (audit_libs && *audit_libs != '\0')
1757 {
1758 char *cp = xstrdup (audit_libs);
1759 do
1760 {
1761 int more = 0;
1762 char *cp2 = strchr (cp, config.rpath_separator);
1763
1764 if (cp2)
1765 {
1766 *cp2 = '\0';
1767 more = 1;
1768 }
1769
1770 if (cp != NULL && *cp != '\0')
1771 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1772
1773 cp = more ? ++cp2 : NULL;
1774 }
1775 while (cp != NULL);
1776 }
1777 }
1778
1779 if (! (bfd_elf_size_dynamic_sections
1780 (link_info.output_bfd, command_line.soname, rpath,
1781 command_line.filter_shlib, audit, depaudit,
1782 (const char * const *) command_line.auxiliary_filters,
1783 &link_info, &sinterp)))
1784 einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
1785
1786 ${ELF_INTERPRETER_SET_DEFAULT}
1787 /* Let the user override the dynamic linker we are using. */
1788 if (command_line.interpreter != NULL
1789 && sinterp != NULL)
1790 {
1791 sinterp->contents = (bfd_byte *) command_line.interpreter;
1792 sinterp->size = strlen (command_line.interpreter) + 1;
1793 }
1794
1795 /* Look for any sections named .gnu.warning. As a GNU extensions,
1796 we treat such sections as containing warning messages. We print
1797 out the warning message, and then zero out the section size so
1798 that it does not get copied into the output file. */
1799
1800 {
1801 LANG_FOR_EACH_INPUT_STATEMENT (is)
1802 {
1803 asection *s;
1804 bfd_size_type sz;
1805 char *msg;
1806
1807 if (is->flags.just_syms)
1808 continue;
1809
1810 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1811 if (s == NULL)
1812 continue;
1813
1814 sz = s->size;
1815 msg = (char *) xmalloc ((size_t) (sz + 1));
1816 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1817 (file_ptr) 0, sz))
1818 einfo (_("%F%P: %pB: can't read contents of section .gnu.warning: %E\n"),
1819 is->the_bfd);
1820 msg[sz] = '\0';
1821 (*link_info.callbacks->warning) (&link_info, msg,
1822 (const char *) NULL, is->the_bfd,
1823 (asection *) NULL, (bfd_vma) 0);
1824 free (msg);
1825
1826 /* Clobber the section size, so that we don't waste space
1827 copying the warning into the output file. If we've already
1828 sized the output section, adjust its size. The adjustment
1829 is on rawsize because targets that size sections early will
1830 have called lang_reset_memory_regions after sizing. */
1831 if (s->output_section != NULL
1832 && s->output_section->rawsize >= s->size)
1833 s->output_section->rawsize -= s->size;
1834
1835 s->size = 0;
1836
1837 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1838 warning section don't get copied to the output. */
1839 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1840 }
1841 }
1842
1843 before_allocation_default ();
1844
1845 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1846 einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
1847
1848 if (ehdr_start != NULL)
1849 {
1850 /* If we twiddled __ehdr_start to defined earlier, put it back
1851 as it was. */
1852 ehdr_start->type = ehdr_start_save_type;
1853 memcpy ((char *) &ehdr_start->u + sizeof ehdr_start->u.def.next,
1854 ehdr_start_save_u,
1855 sizeof ehdr_start_save_u);
1856 }
1857 }
1858
1859 EOF
1860 fi
1861
1862 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1863 fragment <<EOF
1864
1865 /* Try to open a dynamic archive. This is where we know that ELF
1866 dynamic libraries have an extension of .so (or .sl on oddball systems
1867 like hpux). */
1868
1869 static bfd_boolean
1870 gld${EMULATION_NAME}_open_dynamic_archive
1871 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1872 {
1873 const char *filename;
1874 char *string;
1875 size_t len;
1876 bfd_boolean opened = FALSE;
1877
1878 if (! entry->flags.maybe_archive)
1879 return FALSE;
1880
1881 filename = entry->filename;
1882 len = strlen (search->name) + strlen (filename);
1883 if (entry->flags.full_name_provided)
1884 {
1885 len += sizeof "/";
1886 string = (char *) xmalloc (len);
1887 sprintf (string, "%s/%s", search->name, filename);
1888 }
1889 else
1890 {
1891 size_t xlen = 0;
1892
1893 len += strlen (arch) + sizeof "/lib.so";
1894 #ifdef EXTRA_SHLIB_EXTENSION
1895 xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
1896 ? strlen (EXTRA_SHLIB_EXTENSION) - 3
1897 : 0);
1898 #endif
1899 string = (char *) xmalloc (len + xlen);
1900 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1901 #ifdef EXTRA_SHLIB_EXTENSION
1902 /* Try the .so extension first. If that fails build a new filename
1903 using EXTRA_SHLIB_EXTENSION. */
1904 opened = ldfile_try_open_bfd (string, entry);
1905 if (!opened)
1906 strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
1907 #endif
1908 }
1909
1910 if (!opened && !ldfile_try_open_bfd (string, entry))
1911 {
1912 free (string);
1913 return FALSE;
1914 }
1915
1916 entry->filename = string;
1917
1918 /* We have found a dynamic object to include in the link. The ELF
1919 backend linker will create a DT_NEEDED entry in the .dynamic
1920 section naming this file. If this file includes a DT_SONAME
1921 entry, it will be used. Otherwise, the ELF linker will just use
1922 the name of the file. For an archive found by searching, like
1923 this one, the DT_NEEDED entry should consist of just the name of
1924 the file, without the path information used to find it. Note
1925 that we only need to do this if we have a dynamic object; an
1926 archive will never be referenced by a DT_NEEDED entry.
1927
1928 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1929 very pretty. I haven't been able to think of anything that is
1930 pretty, though. */
1931 if (bfd_check_format (entry->the_bfd, bfd_object)
1932 && (entry->the_bfd->flags & DYNAMIC) != 0)
1933 {
1934 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1935
1936 /* Rather than duplicating the logic above. Just use the
1937 filename we recorded earlier. */
1938
1939 if (!entry->flags.full_name_provided)
1940 filename = lbasename (entry->filename);
1941 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1942 }
1943
1944 return TRUE;
1945 }
1946
1947 EOF
1948 fi
1949
1950 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1951 fragment <<EOF
1952
1953 /* A variant of lang_output_section_find used by place_orphan. */
1954
1955 static lang_output_section_statement_type *
1956 output_rel_find (int isdyn, int rela)
1957 {
1958 lang_output_section_statement_type *lookup;
1959 lang_output_section_statement_type *last = NULL;
1960 lang_output_section_statement_type *last_alloc = NULL;
1961 lang_output_section_statement_type *last_ro_alloc = NULL;
1962 lang_output_section_statement_type *last_rel = NULL;
1963 lang_output_section_statement_type *last_rel_alloc = NULL;
1964
1965 for (lookup = &lang_output_section_statement.head->output_section_statement;
1966 lookup != NULL;
1967 lookup = lookup->next)
1968 {
1969 if (lookup->constraint >= 0
1970 && CONST_STRNEQ (lookup->name, ".rel"))
1971 {
1972 int lookrela = lookup->name[4] == 'a';
1973
1974 /* .rel.dyn must come before all other reloc sections, to suit
1975 GNU ld.so. */
1976 if (isdyn)
1977 break;
1978
1979 /* Don't place after .rel.plt as doing so results in wrong
1980 dynamic tags. */
1981 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1982 break;
1983
1984 if (rela == lookrela || last_rel == NULL)
1985 last_rel = lookup;
1986 if ((rela == lookrela || last_rel_alloc == NULL)
1987 && lookup->bfd_section != NULL
1988 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1989 last_rel_alloc = lookup;
1990 }
1991
1992 last = lookup;
1993 if (lookup->bfd_section != NULL
1994 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1995 {
1996 last_alloc = lookup;
1997 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1998 last_ro_alloc = lookup;
1999 }
2000 }
2001
2002 if (last_rel_alloc)
2003 return last_rel_alloc;
2004
2005 if (last_rel)
2006 return last_rel;
2007
2008 if (last_ro_alloc)
2009 return last_ro_alloc;
2010
2011 if (last_alloc)
2012 return last_alloc;
2013
2014 return last;
2015 }
2016
2017 /* Return whether IN is suitable to be part of OUT. */
2018
2019 static bfd_boolean
2020 elf_orphan_compatible (asection *in, asection *out)
2021 {
2022 /* Non-zero sh_info implies a section with SHF_INFO_LINK with
2023 unknown semantics for the generic linker, or a SHT_REL/SHT_RELA
2024 section where sh_info specifies a symbol table. (We won't see
2025 SHT_GROUP, SHT_SYMTAB or SHT_DYNSYM sections here.) We clearly
2026 can't merge SHT_REL/SHT_RELA using differing symbol tables, and
2027 shouldn't merge sections with differing unknown semantics. */
2028 if (elf_section_data (out)->this_hdr.sh_info
2029 != elf_section_data (in)->this_hdr.sh_info)
2030 return FALSE;
2031 /* We can't merge with member of output section group nor merge two
2032 sections with differing SHF_EXCLUDE when doing a relocatable link.
2033 */
2034 if (bfd_link_relocatable (&link_info)
2035 && (elf_next_in_group (out) != NULL
2036 || ((elf_section_flags (out) ^ elf_section_flags (in))
2037 & SHF_EXCLUDE) != 0))
2038 return FALSE;
2039 return _bfd_elf_match_sections_by_type (link_info.output_bfd, out,
2040 in->owner, in);
2041 }
2042
2043 /* Place an orphan section. We use this to put random SHF_ALLOC
2044 sections in the right segment. */
2045
2046 static lang_output_section_statement_type *
2047 gld${EMULATION_NAME}_place_orphan (asection *s,
2048 const char *secname,
2049 int constraint)
2050 {
2051 static struct orphan_save hold[] =
2052 {
2053 { ".text",
2054 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
2055 0, 0, 0, 0 },
2056 { ".rodata",
2057 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2058 0, 0, 0, 0 },
2059 { ".tdata",
2060 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
2061 0, 0, 0, 0 },
2062 { ".data",
2063 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
2064 0, 0, 0, 0 },
2065 { ".bss",
2066 SEC_ALLOC,
2067 0, 0, 0, 0 },
2068 { 0,
2069 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2070 0, 0, 0, 0 },
2071 { ".interp",
2072 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2073 0, 0, 0, 0 },
2074 { ".sdata",
2075 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
2076 0, 0, 0, 0 },
2077 { ".comment",
2078 SEC_HAS_CONTENTS,
2079 0, 0, 0, 0 },
2080 };
2081 enum orphan_save_index
2082 {
2083 orphan_text = 0,
2084 orphan_rodata,
2085 orphan_tdata,
2086 orphan_data,
2087 orphan_bss,
2088 orphan_rel,
2089 orphan_interp,
2090 orphan_sdata,
2091 orphan_nonalloc
2092 };
2093 static int orphan_init_done = 0;
2094 struct orphan_save *place;
2095 lang_output_section_statement_type *after;
2096 lang_output_section_statement_type *os;
2097 lang_output_section_statement_type *match_by_name = NULL;
2098 int isdyn = 0;
2099 int elfinput = s->owner->xvec->flavour == bfd_target_elf_flavour;
2100 int elfoutput = link_info.output_bfd->xvec->flavour == bfd_target_elf_flavour;
2101 unsigned int sh_type = elfinput ? elf_section_type (s) : SHT_NULL;
2102 flagword flags;
2103 asection *nexts;
2104
2105 if (!bfd_link_relocatable (&link_info)
2106 && link_info.combreloc
2107 && (s->flags & SEC_ALLOC))
2108 {
2109 if (elfinput)
2110 switch (sh_type)
2111 {
2112 case SHT_RELA:
2113 secname = ".rela.dyn";
2114 isdyn = 1;
2115 break;
2116 case SHT_REL:
2117 secname = ".rel.dyn";
2118 isdyn = 1;
2119 break;
2120 default:
2121 break;
2122 }
2123 else if (CONST_STRNEQ (secname, ".rel"))
2124 {
2125 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
2126 isdyn = 1;
2127 }
2128 }
2129
2130 if (!bfd_link_relocatable (&link_info)
2131 && elfinput
2132 && elfoutput
2133 && (s->flags & SEC_ALLOC) != 0
2134 && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
2135 {
2136 /* Find the output mbind section with the same type, attributes
2137 and sh_info field. */
2138 for (os = &lang_output_section_statement.head->output_section_statement;
2139 os != NULL;
2140 os = os->next)
2141 if (os->bfd_section != NULL
2142 && !bfd_is_abs_section (os->bfd_section)
2143 && (elf_section_flags (os->bfd_section) & SHF_GNU_MBIND) != 0
2144 && ((s->flags & (SEC_ALLOC
2145 | SEC_LOAD
2146 | SEC_HAS_CONTENTS
2147 | SEC_READONLY
2148 | SEC_CODE))
2149 == (os->bfd_section->flags & (SEC_ALLOC
2150 | SEC_LOAD
2151 | SEC_HAS_CONTENTS
2152 | SEC_READONLY
2153 | SEC_CODE)))
2154 && (elf_section_data (os->bfd_section)->this_hdr.sh_info
2155 == elf_section_data (s)->this_hdr.sh_info))
2156 {
2157 lang_add_section (&os->children, s, NULL, os);
2158 return os;
2159 }
2160
2161 /* Create the output mbind section with the ".mbind." prefix
2162 in section name. */
2163 if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2164 secname = ".mbind.bss";
2165 else if ((s->flags & SEC_READONLY) == 0)
2166 secname = ".mbind.data";
2167 else if ((s->flags & SEC_CODE) == 0)
2168 secname = ".mbind.rodata";
2169 else
2170 secname = ".mbind.text";
2171 }
2172
2173 /* Look through the script to see where to place this section. The
2174 script includes entries added by previous lang_insert_orphan
2175 calls, so this loop puts multiple compatible orphans of the same
2176 name into a single output section. */
2177 if (constraint == 0)
2178 for (os = lang_output_section_find (secname);
2179 os != NULL;
2180 os = next_matching_output_section_statement (os, 0))
2181 {
2182 /* If we don't match an existing output section, tell
2183 lang_insert_orphan to create a new output section. */
2184 constraint = SPECIAL;
2185
2186 /* Check to see if we already have an output section statement
2187 with this name, and its bfd section has compatible flags.
2188 If the section already exists but does not have any flags
2189 set, then it has been created by the linker, possibly as a
2190 result of a --section-start command line switch. */
2191 if (os->bfd_section != NULL
2192 && (os->bfd_section->flags == 0
2193 || (((s->flags ^ os->bfd_section->flags)
2194 & (SEC_LOAD | SEC_ALLOC)) == 0
2195 && (!elfinput
2196 || !elfoutput
2197 || elf_orphan_compatible (s, os->bfd_section)))))
2198 {
2199 lang_add_section (&os->children, s, NULL, os);
2200 return os;
2201 }
2202
2203 /* Save unused output sections in case we can match them
2204 against orphans later. */
2205 if (os->bfd_section == NULL)
2206 match_by_name = os;
2207 }
2208
2209 /* If we didn't match an active output section, see if we matched an
2210 unused one and use that. */
2211 if (match_by_name)
2212 {
2213 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
2214 return match_by_name;
2215 }
2216
2217 if (!orphan_init_done)
2218 {
2219 struct orphan_save *ho;
2220
2221 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
2222 if (ho->name != NULL)
2223 {
2224 ho->os = lang_output_section_find (ho->name);
2225 if (ho->os != NULL && ho->os->flags == 0)
2226 ho->os->flags = ho->flags;
2227 }
2228 orphan_init_done = 1;
2229 }
2230
2231 /* If this is a final link, then always put .gnu.warning.SYMBOL
2232 sections into the .text section to get them out of the way. */
2233 if (bfd_link_executable (&link_info)
2234 && CONST_STRNEQ (s->name, ".gnu.warning.")
2235 && hold[orphan_text].os != NULL)
2236 {
2237 os = hold[orphan_text].os;
2238 lang_add_section (&os->children, s, NULL, os);
2239 return os;
2240 }
2241
2242 flags = s->flags;
2243 if (!bfd_link_relocatable (&link_info))
2244 {
2245 nexts = s;
2246 while ((nexts = bfd_get_next_section_by_name (nexts->owner, nexts))
2247 != NULL)
2248 if (nexts->output_section == NULL
2249 && (nexts->flags & SEC_EXCLUDE) == 0
2250 && ((nexts->flags ^ flags) & (SEC_LOAD | SEC_ALLOC)) == 0
2251 && (nexts->owner->flags & DYNAMIC) == 0
2252 && nexts->owner->usrdata != NULL
2253 && !(((lang_input_statement_type *) nexts->owner->usrdata)
2254 ->flags.just_syms)
2255 && _bfd_elf_match_sections_by_type (nexts->owner, nexts,
2256 s->owner, s))
2257 flags = (((flags ^ SEC_READONLY)
2258 | (nexts->flags ^ SEC_READONLY))
2259 ^ SEC_READONLY);
2260 }
2261
2262 /* Decide which segment the section should go in based on the
2263 section name and section flags. We put loadable .note sections
2264 right after the .interp section, so that the PT_NOTE segment is
2265 stored right after the program headers where the OS can read it
2266 in the first page. */
2267
2268 place = NULL;
2269 if ((flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
2270 place = &hold[orphan_nonalloc];
2271 else if ((flags & SEC_ALLOC) == 0)
2272 ;
2273 else if ((flags & SEC_LOAD) != 0
2274 && (elfinput
2275 ? sh_type == SHT_NOTE
2276 : CONST_STRNEQ (secname, ".note")))
2277 place = &hold[orphan_interp];
2278 else if ((flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
2279 place = &hold[orphan_bss];
2280 else if ((flags & SEC_SMALL_DATA) != 0)
2281 place = &hold[orphan_sdata];
2282 else if ((flags & SEC_THREAD_LOCAL) != 0)
2283 place = &hold[orphan_tdata];
2284 else if ((flags & SEC_READONLY) == 0)
2285 place = &hold[orphan_data];
2286 else if ((flags & SEC_LOAD) != 0
2287 && (elfinput
2288 ? sh_type == SHT_RELA || sh_type == SHT_REL
2289 : CONST_STRNEQ (secname, ".rel")))
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 {
2305 int rela = elfinput ? sh_type == SHT_RELA : secname[4] == 'a';
2306 place->os = output_rel_find (isdyn, rela);
2307 }
2308 }
2309 after = place->os;
2310 if (after == NULL)
2311 after
2312 = lang_output_section_find_by_flags (s, flags, &place->os,
2313 _bfd_elf_match_sections_by_type);
2314 if (after == NULL)
2315 /* *ABS* is always the first output section statement. */
2316 after = &lang_output_section_statement.head->output_section_statement;
2317 }
2318
2319 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
2320 }
2321 EOF
2322 fi
2323
2324 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
2325 fragment <<EOF
2326
2327 static void
2328 gld${EMULATION_NAME}_after_allocation (void)
2329 {
2330 int need_layout = bfd_elf_discard_info (link_info.output_bfd, &link_info);
2331
2332 if (need_layout < 0)
2333 einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
2334 else
2335 gld${EMULATION_NAME}_map_segments (need_layout);
2336 }
2337 EOF
2338 fi
2339
2340 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
2341 fragment <<EOF
2342
2343 static char *
2344 gld${EMULATION_NAME}_get_script (int *isfile)
2345 EOF
2346
2347 if test x"$COMPILE_IN" = xyes
2348 then
2349 # Scripts compiled in.
2350
2351 # sed commands to quote an ld script as a C string.
2352 sc="-f stringify.sed"
2353
2354 fragment <<EOF
2355 {
2356 *isfile = 0;
2357
2358 if (bfd_link_relocatable (&link_info) && config.build_constructors)
2359 return
2360 EOF
2361 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2362 echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
2363 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2364 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2365 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2366 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2367 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2368 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2369 fi
2370 if test -n "$GENERATE_PIE_SCRIPT" ; then
2371 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2372 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2373 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2374 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2375 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2376 sed $sc ldscripts/${EMULATION_NAME}.xdwe >> e${EMULATION_NAME}.c
2377 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2378 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2379 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2380 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2381 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2382 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2383 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2384 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2385 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2386 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2387 sed $sc ldscripts/${EMULATION_NAME}.xdceo >> e${EMULATION_NAME}.c
2388 fi
2389 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2390 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2391 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2392 sed $sc ldscripts/${EMULATION_NAME}.xdce >> e${EMULATION_NAME}.c
2393 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2394 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2395 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2396 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2397 sed $sc ldscripts/${EMULATION_NAME}.xdco >> e${EMULATION_NAME}.c
2398 fi
2399 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2400 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2401 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2402 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2403 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2404 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2405 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2406 sed $sc ldscripts/${EMULATION_NAME}.xdeo >> e${EMULATION_NAME}.c
2407 fi
2408 fi
2409 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2410 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2411 sed $sc ldscripts/${EMULATION_NAME}.xde >> e${EMULATION_NAME}.c
2412 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2413 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2414 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2415 sed $sc ldscripts/${EMULATION_NAME}.xdo >> e${EMULATION_NAME}.c
2416 fi
2417 echo ' ; else if (bfd_link_pie (&link_info)) return' >> e${EMULATION_NAME}.c
2418 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2419 fi
2420 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2421 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2422 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2423 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2424 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2425 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2426 sed $sc ldscripts/${EMULATION_NAME}.xswe >> e${EMULATION_NAME}.c
2427 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2428 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2429 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2430 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2431 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2432 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2433 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2434 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2435 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2436 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2437 sed $sc ldscripts/${EMULATION_NAME}.xsceo >> e${EMULATION_NAME}.c
2438 fi
2439 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2440 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2441 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2442 sed $sc ldscripts/${EMULATION_NAME}.xsce >> e${EMULATION_NAME}.c
2443 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2444 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2445 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2446 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2447 sed $sc ldscripts/${EMULATION_NAME}.xsco >> e${EMULATION_NAME}.c
2448 fi
2449 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2450 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2451 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2452 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2453 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2454 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2455 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2456 sed $sc ldscripts/${EMULATION_NAME}.xseo >> e${EMULATION_NAME}.c
2457 fi
2458 fi
2459 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2460 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2461 sed $sc ldscripts/${EMULATION_NAME}.xse >> e${EMULATION_NAME}.c
2462 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2463 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2464 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2465 sed $sc ldscripts/${EMULATION_NAME}.xso >> e${EMULATION_NAME}.c
2466 fi
2467 echo ' ; else if (bfd_link_dll (&link_info)) return' >> e${EMULATION_NAME}.c
2468 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2469 fi
2470 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2471 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2472 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2473 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2474 sed $sc ldscripts/${EMULATION_NAME}.xwe >> e${EMULATION_NAME}.c
2475 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2476 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2477 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2478 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2479 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2480 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2481 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2482 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2483 sed $sc ldscripts/${EMULATION_NAME}.xceo >> e${EMULATION_NAME}.c
2484 fi
2485 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2486 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2487 sed $sc ldscripts/${EMULATION_NAME}.xce >> e${EMULATION_NAME}.c
2488 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2489 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2490 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2491 sed $sc ldscripts/${EMULATION_NAME}.xco >> e${EMULATION_NAME}.c
2492 fi
2493 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2494 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2495 fi
2496 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2497 echo ' ; else if (link_info.separate_code' >> e${EMULATION_NAME}.c
2498 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2499 sed $sc ldscripts/${EMULATION_NAME}.xeo >> e${EMULATION_NAME}.c
2500 fi
2501 echo ' ; else if (link_info.separate_code) return' >> e${EMULATION_NAME}.c
2502 sed $sc ldscripts/${EMULATION_NAME}.xe >> e${EMULATION_NAME}.c
2503 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2504 echo ' ; else if (link_info.relro) return' >> e${EMULATION_NAME}.c
2505 sed $sc ldscripts/${EMULATION_NAME}.xo >> e${EMULATION_NAME}.c
2506 fi
2507 echo ' ; else return' >> e${EMULATION_NAME}.c
2508 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2509 echo '; }' >> e${EMULATION_NAME}.c
2510
2511 else
2512 # Scripts read from the filesystem.
2513
2514 fragment <<EOF
2515 {
2516 *isfile = 1;
2517
2518 if (bfd_link_relocatable (&link_info) && config.build_constructors)
2519 return "ldscripts/${EMULATION_NAME}.xu";
2520 else if (bfd_link_relocatable (&link_info))
2521 return "ldscripts/${EMULATION_NAME}.xr";
2522 else if (!config.text_read_only)
2523 return "ldscripts/${EMULATION_NAME}.xbn";
2524 EOF
2525 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2526 else
2527 fragment <<EOF
2528 else if (!config.magic_demand_paged)
2529 return "ldscripts/${EMULATION_NAME}.xn";
2530 EOF
2531 fi
2532 if test -n "$GENERATE_PIE_SCRIPT" ; then
2533 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2534 fragment <<EOF
2535 else if (bfd_link_pie (&link_info)
2536 && link_info.combreloc
2537 && link_info.relro
2538 && (link_info.flags & DF_BIND_NOW))
2539 {
2540 if (link_info.separate_code)
2541 return "ldscripts/${EMULATION_NAME}.xdwe";
2542 else
2543 return "ldscripts/${EMULATION_NAME}.xdw";
2544 }
2545 EOF
2546 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2547 fragment <<EOF
2548 else if (bfd_link_pie (&link_info)
2549 && link_info.combreloc
2550 && link_info.relro)
2551 {
2552 if (link_info.separate_code)
2553 return "ldscripts/${EMULATION_NAME}.xdceo";
2554 else
2555 return "ldscripts/${EMULATION_NAME}.xdco";
2556 }
2557 EOF
2558 fi
2559 fragment <<EOF
2560 else if (bfd_link_pie (&link_info)
2561 && link_info.combreloc)
2562 {
2563 if (link_info.separate_code)
2564 return "ldscripts/${EMULATION_NAME}.xdce";
2565 else
2566 return "ldscripts/${EMULATION_NAME}.xdc";
2567 }
2568 EOF
2569 fi
2570 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2571 fragment <<EOF
2572 else if (bfd_link_pie (&link_info)
2573 && link_info.relro)
2574 {
2575 if (link_info.separate_code)
2576 return "ldscripts/${EMULATION_NAME}.xdeo";
2577 else
2578 return "ldscripts/${EMULATION_NAME}.xdo";
2579 }
2580 EOF
2581 fi
2582 fragment <<EOF
2583 else if (bfd_link_pie (&link_info))
2584 {
2585 if (link_info.separate_code)
2586 return "ldscripts/${EMULATION_NAME}.xde";
2587 else
2588 return "ldscripts/${EMULATION_NAME}.xd";
2589 }
2590 EOF
2591 fi
2592 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2593 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2594 fragment <<EOF
2595 else if (bfd_link_dll (&link_info) && link_info.combreloc
2596 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2597 {
2598 if (link_info.separate_code)
2599 return "ldscripts/${EMULATION_NAME}.xswe";
2600 else
2601 return "ldscripts/${EMULATION_NAME}.xsw";
2602 }
2603 EOF
2604 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2605 fragment <<EOF
2606 else if (bfd_link_dll (&link_info)
2607 && link_info.combreloc
2608 && link_info.relro)
2609 {
2610 if (link_info.separate_code)
2611 return "ldscripts/${EMULATION_NAME}.xsceo";
2612 else
2613 return "ldscripts/${EMULATION_NAME}.xsco";
2614 }
2615 EOF
2616 fi
2617 fragment <<EOF
2618 else if (bfd_link_dll (&link_info) && link_info.combreloc)
2619 {
2620 if (link_info.separate_code)
2621 return "ldscripts/${EMULATION_NAME}.xsce";
2622 else
2623 return "ldscripts/${EMULATION_NAME}.xsc";
2624 }
2625 EOF
2626 fi
2627 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2628 fragment <<EOF
2629 else if (bfd_link_dll (&link_info)
2630 && link_info.relro)
2631 {
2632 if (link_info.separate_code)
2633 return "ldscripts/${EMULATION_NAME}.xseo";
2634 else
2635 return "ldscripts/${EMULATION_NAME}.xso";
2636 }
2637 EOF
2638 fi
2639 fragment <<EOF
2640 else if (bfd_link_dll (&link_info))
2641 {
2642 if (link_info.separate_code)
2643 return "ldscripts/${EMULATION_NAME}.xse";
2644 else
2645 return "ldscripts/${EMULATION_NAME}.xs";
2646 }
2647 EOF
2648 fi
2649 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2650 fragment <<EOF
2651 else if (link_info.combreloc && link_info.relro
2652 && (link_info.flags & DF_BIND_NOW))
2653 {
2654 if (link_info.separate_code)
2655 return "ldscripts/${EMULATION_NAME}.xwe";
2656 else
2657 return "ldscripts/${EMULATION_NAME}.xw";
2658 }
2659 EOF
2660 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2661 fragment <<EOF
2662 else if (link_info.combreloc
2663 && link_info.relro)
2664 {
2665 if (link_info.separate_code)
2666 return "ldscripts/${EMULATION_NAME}.xceo";
2667 else
2668 return "ldscripts/${EMULATION_NAME}.xco";
2669 }
2670 EOF
2671 fi
2672 fragment <<EOF
2673 else if (link_info.combreloc)
2674 {
2675 if (link_info.separate_code)
2676 return "ldscripts/${EMULATION_NAME}.xce";
2677 else
2678 return "ldscripts/${EMULATION_NAME}.xc";
2679 }
2680 EOF
2681 fi
2682 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2683 fragment <<EOF
2684 else if (link_info.relro)
2685 {
2686 if (link_info.separate_code)
2687 return "ldscripts/${EMULATION_NAME}.xeo";
2688 else
2689 return "ldscripts/${EMULATION_NAME}.xo";
2690 }
2691 EOF
2692 fi
2693 fragment <<EOF
2694 else
2695 {
2696 if (link_info.separate_code)
2697 return "ldscripts/${EMULATION_NAME}.xe";
2698 else
2699 return "ldscripts/${EMULATION_NAME}.x";
2700 }
2701 }
2702
2703 EOF
2704 fi
2705 fi
2706
2707 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2708 fragment <<EOF
2709 $PARSE_AND_LIST_PROLOGUE
2710 EOF
2711 fi
2712
2713 fragment <<EOF
2714
2715 enum elf_options
2716 {
2717 OPTION_DISABLE_NEW_DTAGS = 400,
2718 OPTION_ENABLE_NEW_DTAGS,
2719 OPTION_GROUP,
2720 OPTION_EH_FRAME_HDR,
2721 OPTION_NO_EH_FRAME_HDR,
2722 OPTION_EXCLUDE_LIBS,
2723 OPTION_HASH_STYLE,
2724 OPTION_BUILD_ID,
2725 OPTION_AUDIT,
2726 OPTION_COMPRESS_DEBUG
2727 };
2728
2729 static void
2730 gld${EMULATION_NAME}_add_options
2731 (int ns, char **shortopts, int nl, struct option **longopts,
2732 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2733 {
2734 EOF
2735 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2736 fragment <<EOF
2737 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2738 EOF
2739 else
2740 fragment <<EOF
2741 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2742 EOF
2743 fi
2744 fragment <<EOF
2745 static const struct option xtra_long[] = {
2746 EOF
2747 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2748 fragment <<EOF
2749 {"audit", required_argument, NULL, OPTION_AUDIT},
2750 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2751 EOF
2752 fi
2753 fragment <<EOF
2754 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2755 {"compress-debug-sections", required_argument, NULL, OPTION_COMPRESS_DEBUG},
2756 EOF
2757 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2758 fragment <<EOF
2759 {"depaudit", required_argument, NULL, 'P'},
2760 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2761 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2762 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2763 {"no-eh-frame-hdr", no_argument, NULL, OPTION_NO_EH_FRAME_HDR},
2764 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2765 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2766 EOF
2767 fi
2768 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2769 fragment <<EOF
2770 $PARSE_AND_LIST_LONGOPTS
2771 EOF
2772 fi
2773 fragment <<EOF
2774 {NULL, no_argument, NULL, 0}
2775 };
2776
2777 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2778 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2779 *longopts = (struct option *)
2780 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2781 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2782 }
2783
2784 #define DEFAULT_BUILD_ID_STYLE "sha1"
2785
2786 static bfd_boolean
2787 gld${EMULATION_NAME}_handle_option (int optc)
2788 {
2789 switch (optc)
2790 {
2791 default:
2792 return FALSE;
2793
2794 case OPTION_BUILD_ID:
2795 if (emit_note_gnu_build_id != NULL)
2796 {
2797 free ((char *) emit_note_gnu_build_id);
2798 emit_note_gnu_build_id = NULL;
2799 }
2800 if (optarg == NULL)
2801 optarg = DEFAULT_BUILD_ID_STYLE;
2802 if (strcmp (optarg, "none"))
2803 emit_note_gnu_build_id = xstrdup (optarg);
2804 break;
2805
2806 case OPTION_COMPRESS_DEBUG:
2807 if (strcasecmp (optarg, "none") == 0)
2808 link_info.compress_debug = COMPRESS_DEBUG_NONE;
2809 else if (strcasecmp (optarg, "zlib") == 0)
2810 link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
2811 else if (strcasecmp (optarg, "zlib-gnu") == 0)
2812 link_info.compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
2813 else if (strcasecmp (optarg, "zlib-gabi") == 0)
2814 link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
2815 else
2816 einfo (_("%F%P: invalid --compress-debug-sections option: \`%s'\n"),
2817 optarg);
2818 break;
2819 EOF
2820
2821 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2822 fragment <<EOF
2823 case OPTION_AUDIT:
2824 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2825 break;
2826
2827 case 'P':
2828 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2829 break;
2830
2831 case OPTION_DISABLE_NEW_DTAGS:
2832 link_info.new_dtags = FALSE;
2833 break;
2834
2835 case OPTION_ENABLE_NEW_DTAGS:
2836 link_info.new_dtags = TRUE;
2837 break;
2838
2839 case OPTION_EH_FRAME_HDR:
2840 link_info.eh_frame_hdr_type = DWARF2_EH_HDR;
2841 break;
2842
2843 case OPTION_NO_EH_FRAME_HDR:
2844 link_info.eh_frame_hdr_type = 0;
2845 break;
2846
2847 case OPTION_GROUP:
2848 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2849 /* Groups must be self-contained. */
2850 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2851 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2852 break;
2853
2854 case OPTION_EXCLUDE_LIBS:
2855 add_excluded_libs (optarg);
2856 break;
2857
2858 case OPTION_HASH_STYLE:
2859 link_info.emit_hash = FALSE;
2860 link_info.emit_gnu_hash = FALSE;
2861 if (strcmp (optarg, "sysv") == 0)
2862 link_info.emit_hash = TRUE;
2863 else if (strcmp (optarg, "gnu") == 0)
2864 link_info.emit_gnu_hash = TRUE;
2865 else if (strcmp (optarg, "both") == 0)
2866 {
2867 link_info.emit_hash = TRUE;
2868 link_info.emit_gnu_hash = TRUE;
2869 }
2870 else
2871 einfo (_("%F%P: invalid hash style \`%s'\n"), optarg);
2872 break;
2873
2874 EOF
2875 fi
2876 fragment <<EOF
2877 case 'z':
2878 if (strcmp (optarg, "defs") == 0)
2879 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2880 else if (strcmp (optarg, "undefs") == 0)
2881 link_info.unresolved_syms_in_objects = RM_IGNORE;
2882 else if (strcmp (optarg, "muldefs") == 0)
2883 link_info.allow_multiple_definition = TRUE;
2884 else if (CONST_STRNEQ (optarg, "max-page-size="))
2885 {
2886 char *end;
2887
2888 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2889 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2890 einfo (_("%F%P: invalid maximum page size \`%s'\n"),
2891 optarg + 14);
2892 }
2893 else if (CONST_STRNEQ (optarg, "common-page-size="))
2894 {
2895 char *end;
2896 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2897 if (*end
2898 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2899 einfo (_("%F%P: invalid common page size \`%s'\n"),
2900 optarg + 17);
2901 }
2902 else if (CONST_STRNEQ (optarg, "stack-size="))
2903 {
2904 char *end;
2905 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2906 if (*end || link_info.stacksize < 0)
2907 einfo (_("%F%P: invalid stack size \`%s'\n"), optarg + 11);
2908 if (!link_info.stacksize)
2909 /* Use -1 for explicit no-stack, because zero means
2910 'default'. */
2911 link_info.stacksize = -1;
2912 }
2913 else if (strcmp (optarg, "execstack") == 0)
2914 {
2915 link_info.execstack = TRUE;
2916 link_info.noexecstack = FALSE;
2917 }
2918 else if (strcmp (optarg, "noexecstack") == 0)
2919 {
2920 link_info.noexecstack = TRUE;
2921 link_info.execstack = FALSE;
2922 }
2923 else if (strcmp (optarg, "globalaudit") == 0)
2924 {
2925 link_info.flags_1 |= DF_1_GLOBAUDIT;
2926 }
2927 EOF
2928
2929 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2930 fragment <<EOF
2931 else if (strcmp (optarg, "global") == 0)
2932 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2933 else if (strcmp (optarg, "initfirst") == 0)
2934 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2935 else if (strcmp (optarg, "interpose") == 0)
2936 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2937 else if (strcmp (optarg, "loadfltr") == 0)
2938 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2939 else if (strcmp (optarg, "nodefaultlib") == 0)
2940 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2941 else if (strcmp (optarg, "nodelete") == 0)
2942 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2943 else if (strcmp (optarg, "nodlopen") == 0)
2944 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2945 else if (strcmp (optarg, "nodump") == 0)
2946 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2947 else if (strcmp (optarg, "now") == 0)
2948 {
2949 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2950 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2951 }
2952 else if (strcmp (optarg, "lazy") == 0)
2953 {
2954 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2955 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2956 }
2957 else if (strcmp (optarg, "origin") == 0)
2958 {
2959 link_info.flags |= (bfd_vma) DF_ORIGIN;
2960 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2961 }
2962 else if (strcmp (optarg, "combreloc") == 0)
2963 link_info.combreloc = TRUE;
2964 else if (strcmp (optarg, "nocombreloc") == 0)
2965 link_info.combreloc = FALSE;
2966 else if (strcmp (optarg, "nocopyreloc") == 0)
2967 link_info.nocopyreloc = TRUE;
2968 else if (strcmp (optarg, "relro") == 0)
2969 link_info.relro = TRUE;
2970 else if (strcmp (optarg, "norelro") == 0)
2971 link_info.relro = FALSE;
2972 else if (strcmp (optarg, "separate-code") == 0)
2973 link_info.separate_code = TRUE;
2974 else if (strcmp (optarg, "noseparate-code") == 0)
2975 link_info.separate_code = FALSE;
2976 else if (strcmp (optarg, "common") == 0)
2977 link_info.elf_stt_common = elf_stt_common;
2978 else if (strcmp (optarg, "nocommon") == 0)
2979 link_info.elf_stt_common = no_elf_stt_common;
2980 else if (strcmp (optarg, "text") == 0)
2981 link_info.error_textrel = TRUE;
2982 else if (strcmp (optarg, "notext") == 0)
2983 link_info.error_textrel = FALSE;
2984 else if (strcmp (optarg, "textoff") == 0)
2985 link_info.error_textrel = FALSE;
2986 EOF
2987 fi
2988
2989 if test -n "$PARSE_AND_LIST_ARGS_CASE_Z" ; then
2990 fragment <<EOF
2991 $PARSE_AND_LIST_ARGS_CASE_Z
2992 EOF
2993 fi
2994
2995 fragment <<EOF
2996 else
2997 einfo (_("%P: warning: -z %s ignored\n"), optarg);
2998 break;
2999 EOF
3000
3001 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
3002 fragment <<EOF
3003 $PARSE_AND_LIST_ARGS_CASES
3004 EOF
3005 fi
3006
3007 fragment <<EOF
3008 }
3009
3010 return TRUE;
3011 }
3012
3013 EOF
3014
3015 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
3016 gld_list_options="gld${EMULATION_NAME}_list_options"
3017 if test -n "$PARSE_AND_LIST_OPTIONS"; then
3018 fragment <<EOF
3019
3020 static void
3021 gld${EMULATION_NAME}_list_options (FILE * file)
3022 {
3023 EOF
3024
3025 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
3026 fragment <<EOF
3027 $PARSE_AND_LIST_OPTIONS
3028 EOF
3029 fi
3030
3031 fragment <<EOF
3032 }
3033 EOF
3034 else
3035 gld_list_options="NULL"
3036 fi
3037
3038 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
3039 fragment <<EOF
3040 $PARSE_AND_LIST_EPILOGUE
3041 EOF
3042 fi
3043 fi
3044
3045 fragment <<EOF
3046
3047 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
3048 {
3049 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
3050 ${LDEMUL_SYSLIB-syslib_default},
3051 ${LDEMUL_HLL-hll_default},
3052 ${LDEMUL_AFTER_PARSE-gld${EMULATION_NAME}_after_parse},
3053 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
3054 ${LDEMUL_AFTER_CHECK_RELOCS-after_check_relocs_default},
3055 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
3056 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
3057 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
3058 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
3059 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
3060 "${EMULATION_NAME}",
3061 "${OUTPUT_FORMAT}",
3062 ${LDEMUL_FINISH-finish_default},
3063 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
3064 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
3065 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
3066 ${LDEMUL_SET_SYMBOLS-NULL},
3067 ${LDEMUL_PARSE_ARGS-NULL},
3068 gld${EMULATION_NAME}_add_options,
3069 gld${EMULATION_NAME}_handle_option,
3070 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
3071 ${LDEMUL_LIST_OPTIONS-${gld_list_options}},
3072 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
3073 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
3074 ${LDEMUL_NEW_VERS_PATTERN-NULL},
3075 ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL}
3076 };
3077 EOF
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