ehdr_start twiddles
[deliverable/binutils-gdb.git] / ld / emultempl / elf32.em
1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 # This file is now misnamed, because it supports both 32 bit and 64 bit
4 # ELF emulations.
5 test -z "${ELFSIZE}" && ELFSIZE=32
6 if [ -z "$MACHINE" ]; then
7 OUTPUT_ARCH=${ARCH}
8 else
9 OUTPUT_ARCH=${ARCH}:${MACHINE}
10 fi
11 fragment <<EOF
12 /* This file is is generated by a shell script. DO NOT EDIT! */
13
14 /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
15 Copyright (C) 1991-2018 Free Software Foundation, Inc.
16 Written by Steve Chamberlain <sac@cygnus.com>
17 ELF support by Ian Lance Taylor <ian@cygnus.com>
18
19 This file is part of the GNU Binutils.
20
21 This program is free software; you can redistribute it and/or modify
22 it under the terms of the GNU General Public License as published by
23 the Free Software Foundation; either version 3 of the License, or
24 (at your option) any later version.
25
26 This program is distributed in the hope that it will be useful,
27 but WITHOUT ANY WARRANTY; without even the implied warranty of
28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 GNU General Public License for more details.
30
31 You should have received a copy of the GNU General Public License
32 along with this program; if not, write to the Free Software
33 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
34 MA 02110-1301, USA. */
35
36 #define TARGET_IS_${EMULATION_NAME}
37
38 #include "sysdep.h"
39 #include "bfd.h"
40 #include "libiberty.h"
41 #include "safe-ctype.h"
42 #include "filenames.h"
43 #include "getopt.h"
44 #include <fcntl.h>
45
46 #include "bfdlink.h"
47
48 #include "ld.h"
49 #include "ldmain.h"
50 #include "ldmisc.h"
51 #include "ldexp.h"
52 #include "ldlang.h"
53 #include "ldfile.h"
54 #include "ldemul.h"
55 #include "ldbuildid.h"
56 #include <ldgram.h>
57 #include "elf/common.h"
58 #include "elf-bfd.h"
59 #include "filenames.h"
60
61 /* Declare functions used by various EXTRA_EM_FILEs. */
62 static void gld${EMULATION_NAME}_before_parse (void);
63 static void gld${EMULATION_NAME}_after_parse (void);
64 static void gld${EMULATION_NAME}_after_open (void);
65 static void gld${EMULATION_NAME}_before_allocation (void);
66 static void gld${EMULATION_NAME}_after_allocation (void);
67 static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan
68 (asection *, const char *, int);
69 EOF
70
71 if [ "x${USE_LIBPATH}" = xyes ] ; then
72 case ${target} in
73 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
74 fragment <<EOF
75 #ifdef HAVE_GLOB
76 #include <glob.h>
77 #endif
78 EOF
79 ;;
80 esac
81 fi
82
83 # Import any needed special functions and/or overrides.
84 #
85 source_em ${srcdir}/emultempl/elf-generic.em
86 if test -n "$EXTRA_EM_FILE" ; then
87 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
88 fi
89
90 # Functions in this file can be overridden by setting the LDEMUL_* shell
91 # variables. If the name of the overriding function is the same as is
92 # defined in this file, then don't output this file's version.
93 # If a different overriding name is given then output the standard function
94 # as presumably it is called from the overriding function.
95 #
96 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
97 fragment <<EOF
98
99 static void
100 gld${EMULATION_NAME}_before_parse (void)
101 {
102 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
103 input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
104 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
105 config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
106 `if test -n "$CALL_NOP_BYTE" ; then echo link_info.call_nop_byte = $CALL_NOP_BYTE; fi`;
107 link_info.check_relocs_after_open_input = TRUE;
108 link_info.relro = DEFAULT_LD_Z_RELRO;
109 link_info.separate_code = DEFAULT_LD_Z_SEPARATE_CODE;
110 }
111
112 EOF
113 fi
114
115 if test x"$LDEMUL_AFTER_PARSE" != xgld"$EMULATION_NAME"_after_parse; then
116 fragment <<EOF
117
118 static void
119 gld${EMULATION_NAME}_after_parse (void)
120 {
121 if (bfd_link_pie (&link_info))
122 link_info.flags_1 |= (bfd_vma) DF_1_PIE;
123
124 if (bfd_link_executable (&link_info)
125 && link_info.nointerp)
126 {
127 if (link_info.dynamic_undefined_weak > 0)
128 einfo (_("%P: warning: -z dynamic-undefined-weak ignored\n"));
129 link_info.dynamic_undefined_weak = 0;
130 }
131 after_parse_default ();
132 }
133
134 EOF
135 fi
136
137 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
138 fragment <<EOF
139 /* Handle the generation of DT_NEEDED tags. */
140
141 static bfd_boolean
142 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
143 {
144 int link_class = 0;
145
146 /* Tell the ELF linker that we don't want the output file to have a
147 DT_NEEDED entry for this file, unless it is used to resolve
148 references in a regular object. */
149 if (entry->flags.add_DT_NEEDED_for_regular)
150 link_class = DYN_AS_NEEDED;
151
152 /* Tell the ELF linker that we don't want the output file to have a
153 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
154 this file at all. */
155 if (!entry->flags.add_DT_NEEDED_for_dynamic)
156 link_class |= DYN_NO_ADD_NEEDED;
157
158 if (entry->flags.just_syms
159 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
160 einfo (_("%F%P: %pB: --just-symbols may not be used on DSO\n"),
161 entry->the_bfd);
162
163 if (link_class == 0
164 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
165 return FALSE;
166
167 bfd_elf_set_dyn_lib_class (entry->the_bfd,
168 (enum dynamic_lib_link_class) link_class);
169
170 /* Continue on with normal load_symbols processing. */
171 return FALSE;
172 }
173 EOF
174 fi
175
176 fragment <<EOF
177
178 /* These variables are required to pass information back and forth
179 between after_open and check_needed and stat_needed and vercheck. */
180
181 static struct bfd_link_needed_list *global_needed;
182 static struct stat global_stat;
183 static lang_input_statement_type *global_found;
184 static struct bfd_link_needed_list *global_vercheck_needed;
185 static bfd_boolean global_vercheck_failed;
186
187 /* These variables are used to implement target options */
188
189 static char *audit; /* colon (typically) separated list of libs */
190 static char *depaudit; /* colon (typically) separated list of libs */
191
192 /* Style of .note.gnu.build-id section. */
193 static const char *emit_note_gnu_build_id;
194
195 /* On Linux, it's possible to have different versions of the same
196 shared library linked against different versions of libc. The
197 dynamic linker somehow tags which libc version to use in
198 /etc/ld.so.cache, and, based on the libc that it sees in the
199 executable, chooses which version of the shared library to use.
200
201 We try to do a similar check here by checking whether this shared
202 library needs any other shared libraries which may conflict with
203 libraries we have already included in the link. If it does, we
204 skip it, and try to find another shared library farther on down the
205 link path.
206
207 This is called via lang_for_each_input_file.
208 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
209 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
210 a conflicting version. */
211
212 static void
213 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
214 {
215 const char *soname;
216 struct bfd_link_needed_list *l;
217
218 if (global_vercheck_failed)
219 return;
220 if (s->the_bfd == NULL
221 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
222 return;
223
224 soname = bfd_elf_get_dt_soname (s->the_bfd);
225 if (soname == NULL)
226 soname = lbasename (bfd_get_filename (s->the_bfd));
227
228 for (l = global_vercheck_needed; l != NULL; l = l->next)
229 {
230 const char *suffix;
231
232 if (filename_cmp (soname, l->name) == 0)
233 {
234 /* Probably can't happen, but it's an easy check. */
235 continue;
236 }
237
238 if (strchr (l->name, '/') != NULL)
239 continue;
240
241 suffix = strstr (l->name, ".so.");
242 if (suffix == NULL)
243 continue;
244
245 suffix += sizeof ".so." - 1;
246
247 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
248 {
249 /* Here we know that S is a dynamic object FOO.SO.VER1, and
250 the object we are considering needs a dynamic object
251 FOO.SO.VER2, and VER1 and VER2 are different. This
252 appears to be a version mismatch, so we tell the caller
253 to try a different version of this library. */
254 global_vercheck_failed = TRUE;
255 return;
256 }
257 }
258 }
259
260
261 /* See if an input file matches a DT_NEEDED entry by running stat on
262 the file. */
263
264 static void
265 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
266 {
267 struct stat st;
268 const char *suffix;
269 const char *soname;
270
271 if (global_found != NULL)
272 return;
273 if (s->the_bfd == NULL)
274 return;
275
276 /* If this input file was an as-needed entry, and wasn't found to be
277 needed at the stage it was linked, then don't say we have loaded it. */
278 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
279 return;
280
281 if (bfd_stat (s->the_bfd, &st) != 0)
282 {
283 einfo (_("%P: %pB: bfd_stat failed: %E\n"), s->the_bfd);
284 return;
285 }
286
287 /* Some operating systems, e.g. Windows, do not provide a meaningful
288 st_ino; they always set it to zero. (Windows does provide a
289 meaningful st_dev.) Do not indicate a duplicate library in that
290 case. While there is no guarantee that a system that provides
291 meaningful inode numbers will never set st_ino to zero, this is
292 merely an optimization, so we do not need to worry about false
293 negatives. */
294 if (st.st_dev == global_stat.st_dev
295 && st.st_ino == global_stat.st_ino
296 && st.st_ino != 0)
297 {
298 global_found = s;
299 return;
300 }
301
302 /* We issue a warning if it looks like we are including two
303 different versions of the same shared library. For example,
304 there may be a problem if -lc picks up libc.so.6 but some other
305 shared library has a DT_NEEDED entry of libc.so.5. This is a
306 heuristic test, and it will only work if the name looks like
307 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
308 If we really want to issue warnings about mixing version numbers
309 of shared libraries, we need to find a better way. */
310
311 if (strchr (global_needed->name, '/') != NULL)
312 return;
313 suffix = strstr (global_needed->name, ".so.");
314 if (suffix == NULL)
315 return;
316 suffix += sizeof ".so." - 1;
317
318 soname = bfd_elf_get_dt_soname (s->the_bfd);
319 if (soname == NULL)
320 soname = lbasename (s->filename);
321
322 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
323 einfo (_("%P: warning: %s, needed by %pB, may conflict with %s\n"),
324 global_needed->name, global_needed->by, soname);
325 }
326
327 struct dt_needed
328 {
329 bfd *by;
330 const char *name;
331 };
332
333 /* This function is called for each possible name for a dynamic object
334 named by a DT_NEEDED entry. The FORCE parameter indicates whether
335 to skip the check for a conflicting version. */
336
337 static bfd_boolean
338 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
339 int force)
340 {
341 bfd *abfd;
342 const char *name = needed->name;
343 const char *soname;
344 int link_class;
345
346 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
347 if (abfd == NULL)
348 {
349 if (verbose)
350 info_msg (_("attempt to open %s failed\n"), name);
351 return FALSE;
352 }
353
354 /* Linker needs to decompress sections. */
355 abfd->flags |= BFD_DECOMPRESS;
356
357 if (! bfd_check_format (abfd, bfd_object))
358 {
359 bfd_close (abfd);
360 return FALSE;
361 }
362 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
363 {
364 bfd_close (abfd);
365 return FALSE;
366 }
367
368 /* For DT_NEEDED, they have to match. */
369 if (abfd->xvec != link_info.output_bfd->xvec)
370 {
371 bfd_close (abfd);
372 return FALSE;
373 }
374
375 /* Check whether this object would include any conflicting library
376 versions. If FORCE is set, then we skip this check; we use this
377 the second time around, if we couldn't find any compatible
378 instance of the shared library. */
379
380 if (! force)
381 {
382 struct bfd_link_needed_list *needs;
383
384 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
385 einfo (_("%F%P: %pB: bfd_elf_get_bfd_needed_list failed: %E\n"), abfd);
386
387 if (needs != NULL)
388 {
389 global_vercheck_needed = needs;
390 global_vercheck_failed = FALSE;
391 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
392 if (global_vercheck_failed)
393 {
394 bfd_close (abfd);
395 /* Return FALSE to force the caller to move on to try
396 another file on the search path. */
397 return FALSE;
398 }
399
400 /* But wait! It gets much worse. On Linux, if a shared
401 library does not use libc at all, we are supposed to skip
402 it the first time around in case we encounter a shared
403 library later on with the same name which does use the
404 version of libc that we want. This is much too horrible
405 to use on any system other than Linux. */
406
407 EOF
408 case ${target} in
409 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
410 fragment <<EOF
411 {
412 struct bfd_link_needed_list *l;
413
414 for (l = needs; l != NULL; l = l->next)
415 if (CONST_STRNEQ (l->name, "libc.so"))
416 break;
417 if (l == NULL)
418 {
419 bfd_close (abfd);
420 return FALSE;
421 }
422 }
423
424 EOF
425 ;;
426 esac
427 fragment <<EOF
428 }
429 }
430
431 /* We've found a dynamic object matching the DT_NEEDED entry. */
432
433 /* We have already checked that there is no other input file of the
434 same name. We must now check again that we are not including the
435 same file twice. We need to do this because on many systems
436 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
437 reference libc.so.1. If we have already included libc.so, we
438 don't want to include libc.so.1 if they are the same file, and we
439 can only check that using stat. */
440
441 if (bfd_stat (abfd, &global_stat) != 0)
442 einfo (_("%F%P: %pB: bfd_stat failed: %E\n"), abfd);
443
444 /* First strip off everything before the last '/'. */
445 soname = lbasename (abfd->filename);
446
447 if (verbose)
448 info_msg (_("found %s at %s\n"), soname, name);
449
450 global_found = NULL;
451 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
452 if (global_found != NULL)
453 {
454 /* Return TRUE to indicate that we found the file, even though
455 we aren't going to do anything with it. */
456 return TRUE;
457 }
458
459 /* Specify the soname to use. */
460 bfd_elf_set_dt_needed_name (abfd, soname);
461
462 /* Tell the ELF linker that we don't want the output file to have a
463 DT_NEEDED entry for this file, unless it is used to resolve
464 references in a regular object. */
465 link_class = DYN_DT_NEEDED;
466
467 /* Tell the ELF linker that we don't want the output file to have a
468 DT_NEEDED entry for this file at all if the entry is from a file
469 with DYN_NO_ADD_NEEDED. */
470 if (needed->by != NULL
471 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
472 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
473
474 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
475
476 /* Add this file into the symbol table. */
477 if (! bfd_link_add_symbols (abfd, &link_info))
478 einfo (_("%F%P: %pB: error adding symbols: %E\n"), abfd);
479
480 return TRUE;
481 }
482
483 /* Search for a needed file in a path. */
484
485 static bfd_boolean
486 gld${EMULATION_NAME}_search_needed (const char *path,
487 struct dt_needed *n, int force)
488 {
489 const char *s;
490 const char *name = n->name;
491 size_t len;
492 struct dt_needed needed;
493
494 if (name[0] == '/')
495 return gld${EMULATION_NAME}_try_needed (n, force);
496
497 if (path == NULL || *path == '\0')
498 return FALSE;
499
500 needed.by = n->by;
501 needed.name = n->name;
502
503 len = strlen (name);
504 while (1)
505 {
506 unsigned offset = 0;
507 char * var;
508 char *filename, *sset;
509
510 s = strchr (path, config.rpath_separator);
511 if (s == NULL)
512 s = path + strlen (path);
513
514 #if HAVE_DOS_BASED_FILE_SYSTEM
515 /* Assume a match on the second char is part of drive specifier. */
516 else if (config.rpath_separator == ':'
517 && s == path + 1
518 && ISALPHA (*path))
519 {
520 s = strchr (s + 1, config.rpath_separator);
521 if (s == NULL)
522 s = path + strlen (path);
523 }
524 #endif
525 filename = (char *) xmalloc (s - path + len + 2);
526 if (s == path)
527 sset = filename;
528 else
529 {
530 memcpy (filename, path, s - path);
531 filename[s - path] = '/';
532 sset = filename + (s - path) + 1;
533 }
534 strcpy (sset, name);
535
536 /* PR 20535: Support the same pseudo-environment variables that
537 are supported by ld.so. Namely, $ORIGIN, $LIB and $PLATFORM.
538 Since there can be more than one occurrence of these tokens in
539 the path we loop until no more are found. Since we might not
540 be able to substitute some of the tokens we maintain an offset
541 into the filename for where we should begin our scan. */
542 while ((var = strchr (filename + offset, '$')) != NULL)
543 {
544 /* The ld.so manual page does not say, but I am going to assume that
545 these tokens are terminated by a directory separator character
546 (/) or the end of the string. There is also an implication that
547 $ORIGIN should only be used at the start of a path, but that is
548 not enforced here.
549
550 The ld.so manual page also states that it allows ${ORIGIN},
551 ${LIB} and ${PLATFORM}, so these are supported as well.
552
553 FIXME: The code could be a lot cleverer about allocating space
554 for the processed string. */
555 char * end = strchr (var, '/');
556 char * replacement = NULL;
557 char * v = var + 1;
558 char * freeme = NULL;
559 unsigned flen = strlen (filename);
560
561 if (end != NULL)
562 /* Temporarily terminate the filename at the end of the token. */
563 * end = 0;
564
565 if (*v == '{')
566 ++ v;
567 switch (*v++)
568 {
569 case 'O':
570 if (strcmp (v, "RIGIN") == 0 || strcmp (v, "RIGIN}") == 0)
571 {
572 /* ORIGIN - replace with the full path to the directory
573 containing the program or shared object. */
574 if (needed.by == NULL)
575 {
576 if (link_info.output_bfd == NULL)
577 {
578 break;
579 }
580 else
581 replacement = bfd_get_filename (link_info.output_bfd);
582 }
583 else
584 replacement = bfd_get_filename (needed.by);
585
586 if (replacement)
587 {
588 char * slash;
589
590 if (replacement[0] == '/')
591 freeme = xstrdup (replacement);
592 else
593 {
594 char * current_dir = getpwd ();
595
596 freeme = xmalloc (strlen (replacement) + strlen (current_dir) + 2);
597 sprintf (freeme, "%s/%s", current_dir, replacement);
598 }
599
600 replacement = freeme;
601 if ((slash = strrchr (replacement, '/')) != NULL)
602 * slash = 0;
603 }
604 }
605 break;
606
607 case 'L':
608 if (strcmp (v, "IB") == 0 || strcmp (v, "IB}") == 0)
609 {
610 /* LIB - replace with "lib" in 32-bit environments
611 and "lib64" in 64-bit environments. */
612
613 /* Note - we could replace this switch statement by
614 conditional fragments of shell script, but that is messy.
615 Any compiler worth its salt is going to optimize away
616 all but one of these case statements anyway. */
617 switch ($ELFSIZE)
618 {
619 case 32: replacement = "lib"; break;
620 case 64: replacement = "lib64"; break;
621 default:
622 /* $ELFSIZE is not 32 or 64 ... */
623 abort ();
624 }
625 }
626 break;
627
628 case 'P':
629 /* Supporting $PLATFORM in a cross-hosted environment is not
630 possible. Supporting it in a native environment involves
631 loading the <sys/auxv.h> header file which loads the
632 system <elf.h> header file, which conflicts with the
633 "include/elf/mips.h" header file. */
634 /* Fall through. */
635 default:
636 break;
637 }
638
639 if (replacement)
640 {
641 char * filename2 = xmalloc (flen + strlen (replacement));
642
643 if (end)
644 {
645 sprintf (filename2, "%.*s%s/%s",
646 (int)(var - filename), filename,
647 replacement, end + 1);
648 offset = (var - filename) + 1 + strlen (replacement);
649 }
650 else
651 {
652 sprintf (filename2, "%.*s%s",
653 (int)(var - filename), filename,
654 replacement);
655 offset = var - filename + strlen (replacement);
656 }
657
658 free (filename);
659 filename = filename2;
660 /* There is no need to restore the path separator (when
661 end != NULL) as we have replaced the entire string. */
662 }
663 else
664 {
665 if (verbose)
666 /* We only issue an "unrecognised" message in verbose mode
667 as the $<foo> token might be a legitimate component of
668 a path name in the target's file system. */
669 info_msg (_("unrecognised or unsupported token '%s' in search path\n"), var);
670
671 if (end)
672 /* Restore the path separator. */
673 * end = '/';
674
675 /* PR 20784: Make sure that we resume the scan *after*
676 the token that we could not replace. */
677 offset = (var + 1) - filename;
678 }
679
680 free (freeme);
681 }
682
683 needed.name = filename;
684
685 if (gld${EMULATION_NAME}_try_needed (&needed, force))
686 return TRUE;
687
688 free (filename);
689
690 if (*s == '\0')
691 break;
692 path = s + 1;
693 }
694
695 return FALSE;
696 }
697
698 EOF
699 if [ "x${USE_LIBPATH}" = xyes ] ; then
700 fragment <<EOF
701
702 /* Prefix the sysroot to absolute paths in PATH, a string containing
703 paths separated by config.rpath_separator. If running on a DOS
704 file system, paths containing a drive spec won't have the sysroot
705 prefix added, unless the sysroot also specifies the same drive. */
706
707 static const char *
708 gld${EMULATION_NAME}_add_sysroot (const char *path)
709 {
710 size_t len, extra;
711 const char *p;
712 char *ret, *q;
713 int dos_drive_sysroot = HAS_DRIVE_SPEC (ld_sysroot);
714
715 len = strlen (ld_sysroot);
716 for (extra = 0, p = path; ; )
717 {
718 int dos_drive = HAS_DRIVE_SPEC (p);
719
720 if (dos_drive)
721 p += 2;
722 if (IS_DIR_SEPARATOR (*p)
723 && (!dos_drive
724 || (dos_drive_sysroot
725 && ld_sysroot[0] == p[-2])))
726 {
727 if (dos_drive && dos_drive_sysroot)
728 extra += len - 2;
729 else
730 extra += len;
731 }
732 p = strchr (p, config.rpath_separator);
733 if (!p)
734 break;
735 ++p;
736 }
737
738 ret = xmalloc (strlen (path) + extra + 1);
739
740 for (q = ret, p = path; ; )
741 {
742 const char *end;
743 int dos_drive = HAS_DRIVE_SPEC (p);
744
745 if (dos_drive)
746 {
747 *q++ = *p++;
748 *q++ = *p++;
749 }
750 if (IS_DIR_SEPARATOR (*p)
751 && (!dos_drive
752 || (dos_drive_sysroot
753 && ld_sysroot[0] == p[-2])))
754 {
755 if (dos_drive && dos_drive_sysroot)
756 {
757 strcpy (q, ld_sysroot + 2);
758 q += len - 2;
759 }
760 else
761 {
762 strcpy (q, ld_sysroot);
763 q += len;
764 }
765 }
766 end = strchr (p, config.rpath_separator);
767 if (end)
768 {
769 size_t n = end - p + 1;
770 strncpy (q, p, n);
771 q += n;
772 p += n;
773 }
774 else
775 {
776 strcpy (q, p);
777 break;
778 }
779 }
780
781 return ret;
782 }
783
784 EOF
785 case ${target} in
786 *-*-freebsd* | *-*-dragonfly*)
787 fragment <<EOF
788 /* Read the system search path the FreeBSD way rather than the Linux way. */
789 #ifdef HAVE_ELF_HINTS_H
790 #include <elf-hints.h>
791 #else
792 #include "elf-hints-local.h"
793 #endif
794
795 static bfd_boolean
796 gld${EMULATION_NAME}_check_ld_elf_hints (const struct bfd_link_needed_list *l,
797 int force)
798 {
799 static bfd_boolean initialized;
800 static const char *ld_elf_hints;
801 struct dt_needed needed;
802
803 if (!initialized)
804 {
805 FILE *f;
806 char *tmppath;
807
808 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
809 f = fopen (tmppath, FOPEN_RB);
810 free (tmppath);
811 if (f != NULL)
812 {
813 struct elfhints_hdr hdr;
814
815 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
816 && hdr.magic == ELFHINTS_MAGIC
817 && hdr.version == 1)
818 {
819 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
820 {
821 char *b;
822
823 b = xmalloc (hdr.dirlistlen + 1);
824 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
825 hdr.dirlistlen + 1)
826 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
827
828 free (b);
829 }
830 }
831 fclose (f);
832 }
833
834 initialized = TRUE;
835 }
836
837 if (ld_elf_hints == NULL)
838 return FALSE;
839
840 needed.by = l->by;
841 needed.name = l->name;
842 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, &needed, force);
843 }
844 EOF
845 # FreeBSD
846 ;;
847
848 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
849 fragment <<EOF
850 /* For a native linker, check the file /etc/ld.so.conf for directories
851 in which we may find shared libraries. /etc/ld.so.conf is really
852 only meaningful on Linux. */
853
854 struct gld${EMULATION_NAME}_ld_so_conf
855 {
856 char *path;
857 size_t len, alloc;
858 };
859
860 static bfd_boolean
861 gld${EMULATION_NAME}_parse_ld_so_conf
862 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
863
864 static void
865 gld${EMULATION_NAME}_parse_ld_so_conf_include
866 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
867 const char *pattern)
868 {
869 char *newp = NULL;
870 #ifdef HAVE_GLOB
871 glob_t gl;
872 #endif
873
874 if (pattern[0] != '/')
875 {
876 char *p = strrchr (filename, '/');
877 size_t patlen = strlen (pattern) + 1;
878
879 newp = xmalloc (p - filename + 1 + patlen);
880 memcpy (newp, filename, p - filename + 1);
881 memcpy (newp + (p - filename + 1), pattern, patlen);
882 pattern = newp;
883 }
884
885 #ifdef HAVE_GLOB
886 if (glob (pattern, 0, NULL, &gl) == 0)
887 {
888 size_t i;
889
890 for (i = 0; i < gl.gl_pathc; ++i)
891 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
892 globfree (&gl);
893 }
894 #else
895 /* If we do not have glob, treat the pattern as a literal filename. */
896 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
897 #endif
898
899 if (newp)
900 free (newp);
901 }
902
903 static bfd_boolean
904 gld${EMULATION_NAME}_parse_ld_so_conf
905 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
906 {
907 FILE *f = fopen (filename, FOPEN_RT);
908 char *line;
909 size_t linelen;
910
911 if (f == NULL)
912 return FALSE;
913
914 linelen = 256;
915 line = xmalloc (linelen);
916 do
917 {
918 char *p = line, *q;
919
920 /* Normally this would use getline(3), but we need to be portable. */
921 while ((q = fgets (p, linelen - (p - line), f)) != NULL
922 && strlen (q) == linelen - (p - line) - 1
923 && line[linelen - 2] != '\n')
924 {
925 line = xrealloc (line, 2 * linelen);
926 p = line + linelen - 1;
927 linelen += linelen;
928 }
929
930 if (q == NULL && p == line)
931 break;
932
933 p = strchr (line, '\n');
934 if (p)
935 *p = '\0';
936
937 /* Because the file format does not know any form of quoting we
938 can search forward for the next '#' character and if found
939 make it terminating the line. */
940 p = strchr (line, '#');
941 if (p)
942 *p = '\0';
943
944 /* Remove leading whitespace. NUL is no whitespace character. */
945 p = line;
946 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
947 ++p;
948
949 /* If the line is blank it is ignored. */
950 if (p[0] == '\0')
951 continue;
952
953 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
954 {
955 char *dir, c;
956 p += 8;
957 do
958 {
959 while (*p == ' ' || *p == '\t')
960 ++p;
961
962 if (*p == '\0')
963 break;
964
965 dir = p;
966
967 while (*p != ' ' && *p != '\t' && *p)
968 ++p;
969
970 c = *p;
971 *p++ = '\0';
972 if (dir[0] != '\0')
973 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
974 dir);
975 }
976 while (c != '\0');
977 }
978 else
979 {
980 char *dir = p;
981 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
982 && *p != '\r' && *p != '\v')
983 ++p;
984
985 while (p != dir && p[-1] == '/')
986 --p;
987 if (info->path == NULL)
988 {
989 info->alloc = p - dir + 1 + 256;
990 info->path = xmalloc (info->alloc);
991 info->len = 0;
992 }
993 else
994 {
995 if (info->len + 1 + (p - dir) >= info->alloc)
996 {
997 info->alloc += p - dir + 256;
998 info->path = xrealloc (info->path, info->alloc);
999 }
1000 info->path[info->len++] = config.rpath_separator;
1001 }
1002 memcpy (info->path + info->len, dir, p - dir);
1003 info->len += p - dir;
1004 info->path[info->len] = '\0';
1005 }
1006 }
1007 while (! feof (f));
1008 free (line);
1009 fclose (f);
1010 return TRUE;
1011 }
1012
1013 static bfd_boolean
1014 gld${EMULATION_NAME}_check_ld_so_conf (const struct bfd_link_needed_list *l,
1015 int force)
1016 {
1017 static bfd_boolean initialized;
1018 static const char *ld_so_conf;
1019 struct dt_needed needed;
1020
1021 if (! initialized)
1022 {
1023 char *tmppath;
1024 struct gld${EMULATION_NAME}_ld_so_conf info;
1025
1026 info.path = NULL;
1027 info.len = info.alloc = 0;
1028 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
1029 (const char *) NULL);
1030 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
1031 {
1032 free (tmppath);
1033 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
1034 (const char *) NULL);
1035 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
1036 }
1037 free (tmppath);
1038
1039 if (info.path)
1040 {
1041 ld_so_conf = gld${EMULATION_NAME}_add_sysroot (info.path);
1042 free (info.path);
1043 }
1044 initialized = TRUE;
1045 }
1046
1047 if (ld_so_conf == NULL)
1048 return FALSE;
1049
1050
1051 needed.by = l->by;
1052 needed.name = l->name;
1053 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
1054 }
1055
1056 EOF
1057 # Linux
1058 ;;
1059 esac
1060 fi
1061 fragment <<EOF
1062
1063 /* See if an input file matches a DT_NEEDED entry by name. */
1064
1065 static void
1066 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
1067 {
1068 const char *soname;
1069
1070 /* Stop looking if we've found a loaded lib. */
1071 if (global_found != NULL
1072 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1073 & DYN_AS_NEEDED) == 0)
1074 return;
1075
1076 if (s->filename == NULL || s->the_bfd == NULL)
1077 return;
1078
1079 /* Don't look for a second non-loaded as-needed lib. */
1080 if (global_found != NULL
1081 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
1082 return;
1083
1084 if (filename_cmp (s->filename, global_needed->name) == 0)
1085 {
1086 global_found = s;
1087 return;
1088 }
1089
1090 if (s->flags.search_dirs)
1091 {
1092 const char *f = strrchr (s->filename, '/');
1093 if (f != NULL
1094 && filename_cmp (f + 1, global_needed->name) == 0)
1095 {
1096 global_found = s;
1097 return;
1098 }
1099 }
1100
1101 soname = bfd_elf_get_dt_soname (s->the_bfd);
1102 if (soname != NULL
1103 && filename_cmp (soname, global_needed->name) == 0)
1104 {
1105 global_found = s;
1106 return;
1107 }
1108 }
1109
1110 EOF
1111
1112 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
1113 fragment <<EOF
1114
1115 static bfd_size_type
1116 id_note_section_size (bfd *abfd ATTRIBUTE_UNUSED)
1117 {
1118 const char *style = emit_note_gnu_build_id;
1119 bfd_size_type size;
1120 bfd_size_type build_id_size;
1121
1122 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
1123 size = (size + 3) & -(bfd_size_type) 4;
1124
1125 build_id_size = compute_build_id_size (style);
1126 if (build_id_size)
1127 size += build_id_size;
1128 else
1129 size = 0;
1130
1131 return size;
1132 }
1133
1134 static bfd_boolean
1135 write_build_id (bfd *abfd)
1136 {
1137 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1138 struct elf_obj_tdata *t = elf_tdata (abfd);
1139 const char *style;
1140 asection *asec;
1141 Elf_Internal_Shdr *i_shdr;
1142 unsigned char *contents, *id_bits;
1143 bfd_size_type size;
1144 file_ptr position;
1145 Elf_External_Note *e_note;
1146
1147 style = t->o->build_id.style;
1148 asec = t->o->build_id.sec;
1149 if (bfd_is_abs_section (asec->output_section))
1150 {
1151 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
1152 " --build-id ignored\n"));
1153 return TRUE;
1154 }
1155 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
1156
1157 if (i_shdr->contents == NULL)
1158 {
1159 if (asec->contents == NULL)
1160 asec->contents = (unsigned char *) xmalloc (asec->size);
1161 contents = asec->contents;
1162 }
1163 else
1164 contents = i_shdr->contents + asec->output_offset;
1165
1166 e_note = (Elf_External_Note *) contents;
1167 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
1168 size = (size + 3) & -(bfd_size_type) 4;
1169 id_bits = contents + size;
1170 size = asec->size - size;
1171
1172 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
1173 bfd_h_put_32 (abfd, size, &e_note->descsz);
1174 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
1175 memcpy (e_note->name, "GNU", sizeof "GNU");
1176
1177 generate_build_id (abfd, style, bed->s->checksum_contents, id_bits, size);
1178
1179 position = i_shdr->sh_offset + asec->output_offset;
1180 size = asec->size;
1181 return (bfd_seek (abfd, position, SEEK_SET) == 0
1182 && bfd_bwrite (contents, size, abfd) == size);
1183 }
1184
1185 /* Make .note.gnu.build-id section, and set up elf_tdata->build_id. */
1186
1187 static bfd_boolean
1188 setup_build_id (bfd *ibfd)
1189 {
1190 asection *s;
1191 bfd_size_type size;
1192 flagword flags;
1193
1194 size = id_note_section_size (ibfd);
1195 if (size == 0)
1196 {
1197 einfo (_("%P: warning: unrecognized --build-id style ignored\n"));
1198 return FALSE;
1199 }
1200
1201 flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
1202 | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
1203 s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags);
1204 if (s != NULL && bfd_set_section_alignment (ibfd, s, 2))
1205 {
1206 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1207 t->o->build_id.after_write_object_contents = &write_build_id;
1208 t->o->build_id.style = emit_note_gnu_build_id;
1209 t->o->build_id.sec = s;
1210 elf_section_type (s) = SHT_NOTE;
1211 s->size = size;
1212 return TRUE;
1213 }
1214
1215 einfo (_("%P: warning: cannot create .note.gnu.build-id section,"
1216 " --build-id ignored\n"));
1217 return FALSE;
1218 }
1219
1220 /* This is called after all the input files have been opened. */
1221
1222 static void
1223 gld${EMULATION_NAME}_after_open (void)
1224 {
1225 struct bfd_link_needed_list *needed, *l;
1226 struct elf_link_hash_table *htab;
1227 asection *s;
1228 bfd *abfd;
1229
1230 after_open_default ();
1231
1232 htab = elf_hash_table (&link_info);
1233 if (!is_elf_hash_table (htab))
1234 return;
1235
1236 if (command_line.out_implib_filename)
1237 {
1238 unlink_if_ordinary (command_line.out_implib_filename);
1239 link_info.out_implib_bfd
1240 = bfd_openw (command_line.out_implib_filename,
1241 bfd_get_target (link_info.output_bfd));
1242
1243 if (link_info.out_implib_bfd == NULL)
1244 {
1245 einfo (_("%F%P: %s: can't open for writing: %E\n"),
1246 command_line.out_implib_filename);
1247 }
1248 }
1249
1250 if (emit_note_gnu_build_id != NULL)
1251 {
1252 /* Find an ELF input. */
1253 for (abfd = link_info.input_bfds;
1254 abfd != (bfd *) NULL; abfd = abfd->link.next)
1255 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1256 && bfd_count_sections (abfd) != 0
1257 && !((lang_input_statement_type *) abfd->usrdata)->flags.just_syms)
1258 break;
1259
1260 /* PR 10555: If there are no ELF input files do not try to
1261 create a .note.gnu-build-id section. */
1262 if (abfd == NULL
1263 || !setup_build_id (abfd))
1264 {
1265 free ((char *) emit_note_gnu_build_id);
1266 emit_note_gnu_build_id = NULL;
1267 }
1268 }
1269
1270 get_elf_backend_data (link_info.output_bfd)->setup_gnu_properties (&link_info);
1271
1272 if (bfd_link_relocatable (&link_info))
1273 {
1274 if (link_info.execstack == ! link_info.noexecstack)
1275 /* PR ld/16744: If "-z [no]execstack" has been specified on the
1276 command line and we are perfoming a relocatable link then no
1277 PT_GNU_STACK segment will be created and so the
1278 linkinfo.[no]execstack values set in _handle_option() will have no
1279 effect. Instead we create a .note.GNU-stack section in much the
1280 same way as the assembler does with its --[no]execstack option. */
1281 (void) bfd_make_section_with_flags (link_info.input_bfds,
1282 ".note.GNU-stack",
1283 SEC_READONLY | (link_info.execstack ? SEC_CODE : 0));
1284
1285 return;
1286 }
1287
1288 if (!link_info.traditional_format)
1289 {
1290 bfd *elfbfd = NULL;
1291 bfd_boolean warn_eh_frame = FALSE;
1292 int seen_type = 0;
1293
1294 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1295 {
1296 int type = 0;
1297
1298 if (((lang_input_statement_type *) abfd->usrdata)->flags.just_syms)
1299 continue;
1300
1301 for (s = abfd->sections; s && type < COMPACT_EH_HDR; s = s->next)
1302 {
1303 const char *name = bfd_get_section_name (abfd, s);
1304
1305 if (bfd_is_abs_section (s->output_section))
1306 continue;
1307 if (CONST_STRNEQ (name, ".eh_frame_entry"))
1308 type = COMPACT_EH_HDR;
1309 else if (strcmp (name, ".eh_frame") == 0 && s->size > 8)
1310 type = DWARF2_EH_HDR;
1311 }
1312
1313 if (type != 0)
1314 {
1315 if (seen_type == 0)
1316 {
1317 seen_type = type;
1318 }
1319 else if (seen_type != type)
1320 {
1321 einfo (_("%F%P: compact frame descriptions incompatible with"
1322 " DWARF2 .eh_frame from %pB\n"),
1323 type == DWARF2_EH_HDR ? abfd : elfbfd);
1324 break;
1325 }
1326
1327 if (!elfbfd
1328 && (type == COMPACT_EH_HDR || link_info.eh_frame_hdr_type != 0))
1329 {
1330 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1331 elfbfd = abfd;
1332
1333 warn_eh_frame = TRUE;
1334 }
1335 }
1336
1337 if (seen_type == COMPACT_EH_HDR)
1338 link_info.eh_frame_hdr_type = COMPACT_EH_HDR;
1339 }
1340 if (elfbfd)
1341 {
1342 const struct elf_backend_data *bed;
1343
1344 bed = get_elf_backend_data (elfbfd);
1345 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1346 bed->dynamic_sec_flags
1347 | SEC_READONLY);
1348 if (s != NULL
1349 && bfd_set_section_alignment (elfbfd, s, 2))
1350 {
1351 htab->eh_info.hdr_sec = s;
1352 warn_eh_frame = FALSE;
1353 }
1354 }
1355 if (warn_eh_frame)
1356 einfo (_("%P: warning: cannot create .eh_frame_hdr section,"
1357 " --eh-frame-hdr ignored\n"));
1358 }
1359
1360 /* Get the list of files which appear in DT_NEEDED entries in
1361 dynamic objects included in the link (often there will be none).
1362 For each such file, we want to track down the corresponding
1363 library, and include the symbol table in the link. This is what
1364 the runtime dynamic linker will do. Tracking the files down here
1365 permits one dynamic object to include another without requiring
1366 special action by the person doing the link. Note that the
1367 needed list can actually grow while we are stepping through this
1368 loop. */
1369 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1370 for (l = needed; l != NULL; l = l->next)
1371 {
1372 struct bfd_link_needed_list *ll;
1373 struct dt_needed n, nn;
1374 int force;
1375
1376 /* If the lib that needs this one was --as-needed and wasn't
1377 found to be needed, then this lib isn't needed either. */
1378 if (l->by != NULL
1379 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1380 continue;
1381
1382 /* Skip the lib if --no-copy-dt-needed-entries and
1383 --allow-shlib-undefined is in effect. */
1384 if (l->by != NULL
1385 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1386 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1387 continue;
1388
1389 /* If we've already seen this file, skip it. */
1390 for (ll = needed; ll != l; ll = ll->next)
1391 if ((ll->by == NULL
1392 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1393 && strcmp (ll->name, l->name) == 0)
1394 break;
1395 if (ll != l)
1396 continue;
1397
1398 /* See if this file was included in the link explicitly. */
1399 global_needed = l;
1400 global_found = NULL;
1401 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1402 if (global_found != NULL
1403 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1404 & DYN_AS_NEEDED) == 0)
1405 continue;
1406
1407 n.by = l->by;
1408 n.name = l->name;
1409 nn.by = l->by;
1410 if (verbose)
1411 info_msg (_("%s needed by %pB\n"), l->name, l->by);
1412
1413 /* As-needed libs specified on the command line (or linker script)
1414 take priority over libs found in search dirs. */
1415 if (global_found != NULL)
1416 {
1417 nn.name = global_found->filename;
1418 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1419 continue;
1420 }
1421
1422 /* We need to find this file and include the symbol table. We
1423 want to search for the file in the same way that the dynamic
1424 linker will search. That means that we want to use
1425 rpath_link, rpath, then the environment variable
1426 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1427 entries (native only), then the linker script LIB_SEARCH_DIRS.
1428 We do not search using the -L arguments.
1429
1430 We search twice. The first time, we skip objects which may
1431 introduce version mismatches. The second time, we force
1432 their use. See gld${EMULATION_NAME}_vercheck comment. */
1433 for (force = 0; force < 2; force++)
1434 {
1435 size_t len;
1436 search_dirs_type *search;
1437 EOF
1438 if [ "x${NATIVE}" = xyes ] || [ "x${USE_LIBPATH}" = xyes ] ; then
1439 fragment <<EOF
1440 const char *path;
1441 EOF
1442 fi
1443 if [ "x${USE_LIBPATH}" = xyes ] ; then
1444 fragment <<EOF
1445 struct bfd_link_needed_list *rp;
1446 int found;
1447 EOF
1448 fi
1449 fragment <<EOF
1450
1451 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1452 &n, force))
1453 break;
1454 EOF
1455 if [ "x${USE_LIBPATH}" = xyes ] ; then
1456 fragment <<EOF
1457 path = command_line.rpath;
1458 if (path)
1459 {
1460 path = gld${EMULATION_NAME}_add_sysroot (path);
1461 found = gld${EMULATION_NAME}_search_needed (path, &n, force);
1462 free ((char *) path);
1463 if (found)
1464 break;
1465 }
1466 EOF
1467 fi
1468 if [ "x${NATIVE}" = xyes ] ; then
1469 fragment <<EOF
1470 if (command_line.rpath_link == NULL
1471 && command_line.rpath == NULL)
1472 {
1473 path = (const char *) getenv ("LD_RUN_PATH");
1474 if (path
1475 && gld${EMULATION_NAME}_search_needed (path, &n, force))
1476 break;
1477 }
1478 path = (const char *) getenv ("LD_LIBRARY_PATH");
1479 if (path
1480 && gld${EMULATION_NAME}_search_needed (path, &n, force))
1481 break;
1482 EOF
1483 fi
1484 if [ "x${USE_LIBPATH}" = xyes ] ; then
1485 fragment <<EOF
1486 found = 0;
1487 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1488 for (; !found && rp != NULL; rp = rp->next)
1489 {
1490 path = gld${EMULATION_NAME}_add_sysroot (rp->name);
1491 found = (rp->by == l->by
1492 && gld${EMULATION_NAME}_search_needed (path, &n,
1493 force));
1494 free ((char *) path);
1495 }
1496 if (found)
1497 break;
1498
1499 EOF
1500 fi
1501 if [ "x${USE_LIBPATH}" = xyes ] ; then
1502 case ${target} in
1503 *-*-freebsd* | *-*-dragonfly*)
1504 fragment <<EOF
1505 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1506 break;
1507 EOF
1508 # FreeBSD
1509 ;;
1510
1511 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1512 fragment <<EOF
1513 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1514 break;
1515
1516 EOF
1517 # Linux
1518 ;;
1519 esac
1520 fi
1521 fragment <<EOF
1522 len = strlen (l->name);
1523 for (search = search_head; search != NULL; search = search->next)
1524 {
1525 char *filename;
1526
1527 if (search->cmdline)
1528 continue;
1529 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1530 sprintf (filename, "%s/%s", search->name, l->name);
1531 nn.name = filename;
1532 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1533 break;
1534 free (filename);
1535 }
1536 if (search != NULL)
1537 break;
1538 EOF
1539 fragment <<EOF
1540 }
1541
1542 if (force < 2)
1543 continue;
1544
1545 einfo (_("%P: warning: %s, needed by %pB, not found "
1546 "(try using -rpath or -rpath-link)\n"),
1547 l->name, l->by);
1548 }
1549
1550 if (link_info.eh_frame_hdr_type == COMPACT_EH_HDR)
1551 if (!bfd_elf_parse_eh_frame_entries (NULL, &link_info))
1552 einfo (_("%F%P: failed to parse EH frame entries\n"));
1553 }
1554
1555 EOF
1556 fi
1557
1558 fragment <<EOF
1559
1560 /* Look through an expression for an assignment statement. */
1561
1562 static void
1563 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1564 {
1565 bfd_boolean provide = FALSE;
1566
1567 switch (exp->type.node_class)
1568 {
1569 case etree_provide:
1570 case etree_provided:
1571 provide = TRUE;
1572 /* Fallthru */
1573 case etree_assign:
1574 /* We call record_link_assignment even if the symbol is defined.
1575 This is because if it is defined by a dynamic object, we
1576 actually want to use the value defined by the linker script,
1577 not the value from the dynamic object (because we are setting
1578 symbols like etext). If the symbol is defined by a regular
1579 object, then, as it happens, calling record_link_assignment
1580 will do no harm. */
1581 if (strcmp (exp->assign.dst, ".") != 0)
1582 {
1583 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1584 &link_info,
1585 exp->assign.dst, provide,
1586 exp->assign.hidden))
1587 einfo (_("%F%P: failed to record assignment to %s: %E\n"),
1588 exp->assign.dst);
1589 }
1590 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1591 break;
1592
1593 case etree_binary:
1594 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1595 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1596 break;
1597
1598 case etree_trinary:
1599 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1600 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1601 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1602 break;
1603
1604 case etree_unary:
1605 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1606 break;
1607
1608 default:
1609 break;
1610 }
1611 }
1612
1613
1614 /* This is called by the before_allocation routine via
1615 lang_for_each_statement. It locates any assignment statements, and
1616 tells the ELF backend about them, in case they are assignments to
1617 symbols which are referred to by dynamic objects. */
1618
1619 static void
1620 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1621 {
1622 if (s->header.type == lang_assignment_statement_enum)
1623 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1624 }
1625
1626 EOF
1627
1628 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1629 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1630 ELF_INTERPRETER_SET_DEFAULT="
1631 if (sinterp != NULL)
1632 {
1633 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1634 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1635 }
1636
1637 "
1638 else
1639 ELF_INTERPRETER_SET_DEFAULT=
1640 fi
1641 fragment <<EOF
1642
1643 /* used by before_allocation and handle_option. */
1644 static void
1645 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1646 {
1647 if (*to == NULL)
1648 *to = xstrdup (op_arg);
1649 else
1650 {
1651 size_t to_len = strlen (*to);
1652 size_t op_arg_len = strlen (op_arg);
1653 char *buf;
1654 char *cp = *to;
1655
1656 /* First see whether OPTARG is already in the path. */
1657 do
1658 {
1659 if (strncmp (op_arg, cp, op_arg_len) == 0
1660 && (cp[op_arg_len] == 0
1661 || cp[op_arg_len] == config.rpath_separator))
1662 /* We found it. */
1663 break;
1664
1665 /* Not yet found. */
1666 cp = strchr (cp, config.rpath_separator);
1667 if (cp != NULL)
1668 ++cp;
1669 }
1670 while (cp != NULL);
1671
1672 if (cp == NULL)
1673 {
1674 buf = xmalloc (to_len + op_arg_len + 2);
1675 sprintf (buf, "%s%c%s", *to,
1676 config.rpath_separator, op_arg);
1677 free (*to);
1678 *to = buf;
1679 }
1680 }
1681 }
1682
1683 /* This is called after the sections have been attached to output
1684 sections, but before any sizes or addresses have been set. */
1685
1686 static void
1687 gld${EMULATION_NAME}_before_allocation (void)
1688 {
1689 const char *rpath;
1690 asection *sinterp;
1691 bfd *abfd;
1692 struct bfd_link_hash_entry *ehdr_start = NULL;
1693 unsigned char ehdr_start_save_type = 0;
1694 char ehdr_start_save_u[sizeof ehdr_start->u
1695 - sizeof ehdr_start->u.def.next] = "";
1696
1697 if (is_elf_hash_table (link_info.hash))
1698 {
1699 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1700
1701 /* Make __ehdr_start hidden if it has been referenced, to
1702 prevent the symbol from being dynamic. */
1703 if (!bfd_link_relocatable (&link_info))
1704 {
1705 struct elf_link_hash_table *htab = elf_hash_table (&link_info);
1706 struct elf_link_hash_entry *h
1707 = elf_link_hash_lookup (htab, "__ehdr_start", FALSE, FALSE, TRUE);
1708
1709 /* Only adjust the export class if the symbol was referenced
1710 and not defined, otherwise leave it alone. */
1711 if (h != NULL
1712 && (h->root.type == bfd_link_hash_new
1713 || h->root.type == bfd_link_hash_undefined
1714 || h->root.type == bfd_link_hash_undefweak
1715 || h->root.type == bfd_link_hash_common))
1716 {
1717 const struct elf_backend_data *bed;
1718 bed = get_elf_backend_data (link_info.output_bfd);
1719 (*bed->elf_backend_hide_symbol) (&link_info, h, TRUE);
1720 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
1721 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
1722 /* Don't leave the symbol undefined. Undefined hidden
1723 symbols typically won't have dynamic relocations, but
1724 we most likely will need dynamic relocations for
1725 __ehdr_start if we are building a PIE or shared
1726 library. */
1727 ehdr_start = &h->root;
1728 ehdr_start_save_type = ehdr_start->type;
1729 memcpy (ehdr_start_save_u,
1730 (char *) &ehdr_start->u + sizeof ehdr_start->u.def.next,
1731 sizeof ehdr_start_save_u);
1732 ehdr_start->type = bfd_link_hash_defined;
1733 ehdr_start->u.def.section = bfd_abs_section_ptr;
1734 ehdr_start->u.def.value = 0;
1735 }
1736 }
1737
1738 /* If we are going to make any variable assignments, we need to
1739 let the ELF backend know about them in case the variables are
1740 referred to by dynamic objects. */
1741 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1742 }
1743
1744 /* Let the ELF backend work out the sizes of any sections required
1745 by dynamic linking. */
1746 rpath = command_line.rpath;
1747 if (rpath == NULL)
1748 rpath = (const char *) getenv ("LD_RUN_PATH");
1749
1750 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1751 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1752 {
1753 const char *audit_libs = elf_dt_audit (abfd);
1754
1755 /* If the input bfd contains an audit entry, we need to add it as
1756 a dep audit entry. */
1757 if (audit_libs && *audit_libs != '\0')
1758 {
1759 char *cp = xstrdup (audit_libs);
1760 do
1761 {
1762 int more = 0;
1763 char *cp2 = strchr (cp, config.rpath_separator);
1764
1765 if (cp2)
1766 {
1767 *cp2 = '\0';
1768 more = 1;
1769 }
1770
1771 if (cp != NULL && *cp != '\0')
1772 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1773
1774 cp = more ? ++cp2 : NULL;
1775 }
1776 while (cp != NULL);
1777 }
1778 }
1779
1780 if (! (bfd_elf_size_dynamic_sections
1781 (link_info.output_bfd, command_line.soname, rpath,
1782 command_line.filter_shlib, audit, depaudit,
1783 (const char * const *) command_line.auxiliary_filters,
1784 &link_info, &sinterp)))
1785 einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
1786
1787 ${ELF_INTERPRETER_SET_DEFAULT}
1788 /* Let the user override the dynamic linker we are using. */
1789 if (command_line.interpreter != NULL
1790 && sinterp != NULL)
1791 {
1792 sinterp->contents = (bfd_byte *) command_line.interpreter;
1793 sinterp->size = strlen (command_line.interpreter) + 1;
1794 }
1795
1796 /* Look for any sections named .gnu.warning. As a GNU extensions,
1797 we treat such sections as containing warning messages. We print
1798 out the warning message, and then zero out the section size so
1799 that it does not get copied into the output file. */
1800
1801 {
1802 LANG_FOR_EACH_INPUT_STATEMENT (is)
1803 {
1804 asection *s;
1805 bfd_size_type sz;
1806 char *msg;
1807
1808 if (is->flags.just_syms)
1809 continue;
1810
1811 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1812 if (s == NULL)
1813 continue;
1814
1815 sz = s->size;
1816 msg = (char *) xmalloc ((size_t) (sz + 1));
1817 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1818 (file_ptr) 0, sz))
1819 einfo (_("%F%P: %pB: can't read contents of section .gnu.warning: %E\n"),
1820 is->the_bfd);
1821 msg[sz] = '\0';
1822 (*link_info.callbacks->warning) (&link_info, msg,
1823 (const char *) NULL, is->the_bfd,
1824 (asection *) NULL, (bfd_vma) 0);
1825 free (msg);
1826
1827 /* Clobber the section size, so that we don't waste space
1828 copying the warning into the output file. If we've already
1829 sized the output section, adjust its size. The adjustment
1830 is on rawsize because targets that size sections early will
1831 have called lang_reset_memory_regions after sizing. */
1832 if (s->output_section != NULL
1833 && s->output_section->rawsize >= s->size)
1834 s->output_section->rawsize -= s->size;
1835
1836 s->size = 0;
1837
1838 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1839 warning section don't get copied to the output. */
1840 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1841 }
1842 }
1843
1844 before_allocation_default ();
1845
1846 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1847 einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
1848
1849 if (ehdr_start != NULL)
1850 {
1851 /* If we twiddled __ehdr_start to defined earlier, put it back
1852 as it was. */
1853 ehdr_start->type = ehdr_start_save_type;
1854 memcpy ((char *) &ehdr_start->u + sizeof ehdr_start->u.def.next,
1855 ehdr_start_save_u,
1856 sizeof ehdr_start_save_u);
1857 }
1858 }
1859
1860 EOF
1861 fi
1862
1863 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1864 fragment <<EOF
1865
1866 /* Try to open a dynamic archive. This is where we know that ELF
1867 dynamic libraries have an extension of .so (or .sl on oddball systems
1868 like hpux). */
1869
1870 static bfd_boolean
1871 gld${EMULATION_NAME}_open_dynamic_archive
1872 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1873 {
1874 const char *filename;
1875 char *string;
1876 size_t len;
1877 bfd_boolean opened = FALSE;
1878
1879 if (! entry->flags.maybe_archive)
1880 return FALSE;
1881
1882 filename = entry->filename;
1883 len = strlen (search->name) + strlen (filename);
1884 if (entry->flags.full_name_provided)
1885 {
1886 len += sizeof "/";
1887 string = (char *) xmalloc (len);
1888 sprintf (string, "%s/%s", search->name, filename);
1889 }
1890 else
1891 {
1892 size_t xlen = 0;
1893
1894 len += strlen (arch) + sizeof "/lib.so";
1895 #ifdef EXTRA_SHLIB_EXTENSION
1896 xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
1897 ? strlen (EXTRA_SHLIB_EXTENSION) - 3
1898 : 0);
1899 #endif
1900 string = (char *) xmalloc (len + xlen);
1901 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1902 #ifdef EXTRA_SHLIB_EXTENSION
1903 /* Try the .so extension first. If that fails build a new filename
1904 using EXTRA_SHLIB_EXTENSION. */
1905 opened = ldfile_try_open_bfd (string, entry);
1906 if (!opened)
1907 strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
1908 #endif
1909 }
1910
1911 if (!opened && !ldfile_try_open_bfd (string, entry))
1912 {
1913 free (string);
1914 return FALSE;
1915 }
1916
1917 entry->filename = string;
1918
1919 /* We have found a dynamic object to include in the link. The ELF
1920 backend linker will create a DT_NEEDED entry in the .dynamic
1921 section naming this file. If this file includes a DT_SONAME
1922 entry, it will be used. Otherwise, the ELF linker will just use
1923 the name of the file. For an archive found by searching, like
1924 this one, the DT_NEEDED entry should consist of just the name of
1925 the file, without the path information used to find it. Note
1926 that we only need to do this if we have a dynamic object; an
1927 archive will never be referenced by a DT_NEEDED entry.
1928
1929 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1930 very pretty. I haven't been able to think of anything that is
1931 pretty, though. */
1932 if (bfd_check_format (entry->the_bfd, bfd_object)
1933 && (entry->the_bfd->flags & DYNAMIC) != 0)
1934 {
1935 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1936
1937 /* Rather than duplicating the logic above. Just use the
1938 filename we recorded earlier. */
1939
1940 if (!entry->flags.full_name_provided)
1941 filename = lbasename (entry->filename);
1942 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1943 }
1944
1945 return TRUE;
1946 }
1947
1948 EOF
1949 fi
1950
1951 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1952 fragment <<EOF
1953
1954 /* A variant of lang_output_section_find used by place_orphan. */
1955
1956 static lang_output_section_statement_type *
1957 output_rel_find (asection *sec, int isdyn)
1958 {
1959 lang_output_section_statement_type *lookup;
1960 lang_output_section_statement_type *last = NULL;
1961 lang_output_section_statement_type *last_alloc = NULL;
1962 lang_output_section_statement_type *last_ro_alloc = NULL;
1963 lang_output_section_statement_type *last_rel = NULL;
1964 lang_output_section_statement_type *last_rel_alloc = NULL;
1965 int rela = sec->name[4] == 'a';
1966
1967 for (lookup = &lang_output_section_statement.head->output_section_statement;
1968 lookup != NULL;
1969 lookup = lookup->next)
1970 {
1971 if (lookup->constraint >= 0
1972 && CONST_STRNEQ (lookup->name, ".rel"))
1973 {
1974 int lookrela = lookup->name[4] == 'a';
1975
1976 /* .rel.dyn must come before all other reloc sections, to suit
1977 GNU ld.so. */
1978 if (isdyn)
1979 break;
1980
1981 /* Don't place after .rel.plt as doing so results in wrong
1982 dynamic tags. */
1983 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1984 break;
1985
1986 if (rela == lookrela || last_rel == NULL)
1987 last_rel = lookup;
1988 if ((rela == lookrela || last_rel_alloc == NULL)
1989 && lookup->bfd_section != NULL
1990 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1991 last_rel_alloc = lookup;
1992 }
1993
1994 last = lookup;
1995 if (lookup->bfd_section != NULL
1996 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1997 {
1998 last_alloc = lookup;
1999 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
2000 last_ro_alloc = lookup;
2001 }
2002 }
2003
2004 if (last_rel_alloc)
2005 return last_rel_alloc;
2006
2007 if (last_rel)
2008 return last_rel;
2009
2010 if (last_ro_alloc)
2011 return last_ro_alloc;
2012
2013 if (last_alloc)
2014 return last_alloc;
2015
2016 return last;
2017 }
2018
2019 /* Return whether IN is suitable to be part of OUT. */
2020
2021 static bfd_boolean
2022 elf_orphan_compatible (asection *in, asection *out)
2023 {
2024 /* Non-zero sh_info implies a section with SHF_INFO_LINK with
2025 unknown semantics for the generic linker, or a SHT_REL/SHT_RELA
2026 section where sh_info specifies a symbol table. (We won't see
2027 SHT_GROUP, SHT_SYMTAB or SHT_DYNSYM sections here.) We clearly
2028 can't merge SHT_REL/SHT_RELA using differing symbol tables, and
2029 shouldn't merge sections with differing unknown semantics. */
2030 if (elf_section_data (out)->this_hdr.sh_info
2031 != elf_section_data (in)->this_hdr.sh_info)
2032 return FALSE;
2033 /* We can't merge two sections with differing SHF_EXCLUDE when doing
2034 a relocatable link. */
2035 if (bfd_link_relocatable (&link_info)
2036 && ((elf_section_flags (out) ^ elf_section_flags (in)) & SHF_EXCLUDE) != 0)
2037 return FALSE;
2038 return _bfd_elf_match_sections_by_type (link_info.output_bfd, out,
2039 in->owner, in);
2040 }
2041
2042 /* Place an orphan section. We use this to put random SHF_ALLOC
2043 sections in the right segment. */
2044
2045 static lang_output_section_statement_type *
2046 gld${EMULATION_NAME}_place_orphan (asection *s,
2047 const char *secname,
2048 int constraint)
2049 {
2050 static struct orphan_save hold[] =
2051 {
2052 { ".text",
2053 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
2054 0, 0, 0, 0 },
2055 { ".rodata",
2056 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2057 0, 0, 0, 0 },
2058 { ".tdata",
2059 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
2060 0, 0, 0, 0 },
2061 { ".data",
2062 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
2063 0, 0, 0, 0 },
2064 { ".bss",
2065 SEC_ALLOC,
2066 0, 0, 0, 0 },
2067 { 0,
2068 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2069 0, 0, 0, 0 },
2070 { ".interp",
2071 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2072 0, 0, 0, 0 },
2073 { ".sdata",
2074 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
2075 0, 0, 0, 0 },
2076 { ".comment",
2077 SEC_HAS_CONTENTS,
2078 0, 0, 0, 0 },
2079 };
2080 enum orphan_save_index
2081 {
2082 orphan_text = 0,
2083 orphan_rodata,
2084 orphan_tdata,
2085 orphan_data,
2086 orphan_bss,
2087 orphan_rel,
2088 orphan_interp,
2089 orphan_sdata,
2090 orphan_nonalloc
2091 };
2092 static int orphan_init_done = 0;
2093 struct orphan_save *place;
2094 lang_output_section_statement_type *after;
2095 lang_output_section_statement_type *os;
2096 lang_output_section_statement_type *match_by_name = NULL;
2097 int isdyn = 0;
2098 int elfinput = s->owner->xvec->flavour == bfd_target_elf_flavour;
2099 int elfoutput = link_info.output_bfd->xvec->flavour == bfd_target_elf_flavour;
2100 unsigned int sh_type = elfinput ? elf_section_type (s) : SHT_NULL;
2101 flagword flags;
2102 asection *nexts;
2103
2104 if (!bfd_link_relocatable (&link_info)
2105 && link_info.combreloc
2106 && (s->flags & SEC_ALLOC))
2107 {
2108 if (elfinput)
2109 switch (sh_type)
2110 {
2111 case SHT_RELA:
2112 secname = ".rela.dyn";
2113 isdyn = 1;
2114 break;
2115 case SHT_REL:
2116 secname = ".rel.dyn";
2117 isdyn = 1;
2118 break;
2119 default:
2120 break;
2121 }
2122 else if (CONST_STRNEQ (secname, ".rel"))
2123 {
2124 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
2125 isdyn = 1;
2126 }
2127 }
2128
2129 if (!bfd_link_relocatable (&link_info)
2130 && elfinput
2131 && elfoutput
2132 && (s->flags & SEC_ALLOC) != 0
2133 && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
2134 {
2135 /* Find the output mbind section with the same type, attributes
2136 and sh_info field. */
2137 for (os = &lang_output_section_statement.head->output_section_statement;
2138 os != NULL;
2139 os = os->next)
2140 if (os->bfd_section != NULL
2141 && !bfd_is_abs_section (os->bfd_section)
2142 && (elf_section_flags (os->bfd_section) & SHF_GNU_MBIND) != 0
2143 && ((s->flags & (SEC_ALLOC
2144 | SEC_LOAD
2145 | SEC_HAS_CONTENTS
2146 | SEC_READONLY
2147 | SEC_CODE))
2148 == (os->bfd_section->flags & (SEC_ALLOC
2149 | SEC_LOAD
2150 | SEC_HAS_CONTENTS
2151 | SEC_READONLY
2152 | SEC_CODE)))
2153 && (elf_section_data (os->bfd_section)->this_hdr.sh_info
2154 == elf_section_data (s)->this_hdr.sh_info))
2155 {
2156 lang_add_section (&os->children, s, NULL, os);
2157 return os;
2158 }
2159
2160 /* Create the output mbind section with the ".mbind." prefix
2161 in section name. */
2162 if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2163 secname = ".mbind.bss";
2164 else if ((s->flags & SEC_READONLY) == 0)
2165 secname = ".mbind.data";
2166 else if ((s->flags & SEC_CODE) == 0)
2167 secname = ".mbind.rodata";
2168 else
2169 secname = ".mbind.text";
2170 }
2171
2172 /* Look through the script to see where to place this section. The
2173 script includes entries added by previous lang_insert_orphan
2174 calls, so this loop puts multiple compatible orphans of the same
2175 name into a single output section. */
2176 if (constraint == 0)
2177 for (os = lang_output_section_find (secname);
2178 os != NULL;
2179 os = next_matching_output_section_statement (os, 0))
2180 {
2181 /* If we don't match an existing output section, tell
2182 lang_insert_orphan to create a new output section. */
2183 constraint = SPECIAL;
2184
2185 /* Check to see if we already have an output section statement
2186 with this name, and its bfd section has compatible flags.
2187 If the section already exists but does not have any flags
2188 set, then it has been created by the linker, possibly as a
2189 result of a --section-start command line switch. */
2190 if (os->bfd_section != NULL
2191 && (os->bfd_section->flags == 0
2192 || (((s->flags ^ os->bfd_section->flags)
2193 & (SEC_LOAD | SEC_ALLOC)) == 0
2194 && (!elfinput
2195 || !elfoutput
2196 || elf_orphan_compatible (s, os->bfd_section)))))
2197 {
2198 lang_add_section (&os->children, s, NULL, os);
2199 return os;
2200 }
2201
2202 /* Save unused output sections in case we can match them
2203 against orphans later. */
2204 if (os->bfd_section == NULL)
2205 match_by_name = os;
2206 }
2207
2208 /* If we didn't match an active output section, see if we matched an
2209 unused one and use that. */
2210 if (match_by_name)
2211 {
2212 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
2213 return match_by_name;
2214 }
2215
2216 if (!orphan_init_done)
2217 {
2218 struct orphan_save *ho;
2219
2220 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
2221 if (ho->name != NULL)
2222 {
2223 ho->os = lang_output_section_find (ho->name);
2224 if (ho->os != NULL && ho->os->flags == 0)
2225 ho->os->flags = ho->flags;
2226 }
2227 orphan_init_done = 1;
2228 }
2229
2230 /* If this is a final link, then always put .gnu.warning.SYMBOL
2231 sections into the .text section to get them out of the way. */
2232 if (bfd_link_executable (&link_info)
2233 && CONST_STRNEQ (s->name, ".gnu.warning.")
2234 && hold[orphan_text].os != NULL)
2235 {
2236 os = hold[orphan_text].os;
2237 lang_add_section (&os->children, s, NULL, os);
2238 return os;
2239 }
2240
2241 flags = s->flags;
2242 if (!bfd_link_relocatable (&link_info))
2243 {
2244 nexts = s;
2245 while ((nexts = bfd_get_next_section_by_name (nexts->owner, nexts))
2246 != NULL)
2247 if (nexts->output_section == NULL
2248 && (nexts->flags & SEC_EXCLUDE) == 0
2249 && ((nexts->flags ^ flags) & (SEC_LOAD | SEC_ALLOC)) == 0
2250 && (nexts->owner->flags & DYNAMIC) == 0
2251 && nexts->owner->usrdata != NULL
2252 && !(((lang_input_statement_type *) nexts->owner->usrdata)
2253 ->flags.just_syms)
2254 && _bfd_elf_match_sections_by_type (nexts->owner, nexts,
2255 s->owner, s))
2256 flags = (((flags ^ SEC_READONLY)
2257 | (nexts->flags ^ SEC_READONLY))
2258 ^ SEC_READONLY);
2259 }
2260
2261 /* Decide which segment the section should go in based on the
2262 section name and section flags. We put loadable .note sections
2263 right after the .interp section, so that the PT_NOTE segment is
2264 stored right after the program headers where the OS can read it
2265 in the first page. */
2266
2267 place = NULL;
2268 if ((flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
2269 place = &hold[orphan_nonalloc];
2270 else if ((flags & SEC_ALLOC) == 0)
2271 ;
2272 else if ((flags & SEC_LOAD) != 0
2273 && ((elfinput && sh_type == SHT_NOTE)
2274 || (!elfinput && CONST_STRNEQ (secname, ".note"))))
2275 place = &hold[orphan_interp];
2276 else if ((flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
2277 place = &hold[orphan_bss];
2278 else if ((flags & SEC_SMALL_DATA) != 0)
2279 place = &hold[orphan_sdata];
2280 else if ((flags & SEC_THREAD_LOCAL) != 0)
2281 place = &hold[orphan_tdata];
2282 else if ((flags & SEC_READONLY) == 0)
2283 place = &hold[orphan_data];
2284 else if (((elfinput && (sh_type == SHT_RELA || sh_type == SHT_REL))
2285 || (!elfinput && CONST_STRNEQ (secname, ".rel")))
2286 && (flags & SEC_LOAD) != 0)
2287 place = &hold[orphan_rel];
2288 else if ((flags & SEC_CODE) == 0)
2289 place = &hold[orphan_rodata];
2290 else
2291 place = &hold[orphan_text];
2292
2293 after = NULL;
2294 if (place != NULL)
2295 {
2296 if (place->os == NULL)
2297 {
2298 if (place->name != NULL)
2299 place->os = lang_output_section_find (place->name);
2300 else
2301 place->os = output_rel_find (s, isdyn);
2302 }
2303 after = place->os;
2304 if (after == NULL)
2305 after
2306 = lang_output_section_find_by_flags (s, flags, &place->os,
2307 _bfd_elf_match_sections_by_type);
2308 if (after == NULL)
2309 /* *ABS* is always the first output section statement. */
2310 after = &lang_output_section_statement.head->output_section_statement;
2311 }
2312
2313 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
2314 }
2315 EOF
2316 fi
2317
2318 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
2319 fragment <<EOF
2320
2321 static void
2322 gld${EMULATION_NAME}_after_allocation (void)
2323 {
2324 int need_layout = bfd_elf_discard_info (link_info.output_bfd, &link_info);
2325
2326 if (need_layout < 0)
2327 einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
2328 else
2329 gld${EMULATION_NAME}_map_segments (need_layout);
2330 }
2331 EOF
2332 fi
2333
2334 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
2335 fragment <<EOF
2336
2337 static char *
2338 gld${EMULATION_NAME}_get_script (int *isfile)
2339 EOF
2340
2341 if test x"$COMPILE_IN" = xyes
2342 then
2343 # Scripts compiled in.
2344
2345 # sed commands to quote an ld script as a C string.
2346 sc="-f stringify.sed"
2347
2348 fragment <<EOF
2349 {
2350 *isfile = 0;
2351
2352 if (bfd_link_relocatable (&link_info) && config.build_constructors)
2353 return
2354 EOF
2355 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2356 echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
2357 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2358 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2359 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2360 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2361 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2362 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2363 fi
2364 if test -n "$GENERATE_PIE_SCRIPT" ; then
2365 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2366 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2367 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2368 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2369 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2370 sed $sc ldscripts/${EMULATION_NAME}.xdwe >> e${EMULATION_NAME}.c
2371 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2372 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2373 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2374 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2375 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2376 if test -n "$GENERATE_RELRO_SCRIPT" ; then
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.separate_code' >> e${EMULATION_NAME}.c
2380 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2381 sed $sc ldscripts/${EMULATION_NAME}.xdceo >> e${EMULATION_NAME}.c
2382 fi
2383 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2384 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2385 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2386 sed $sc ldscripts/${EMULATION_NAME}.xdce >> e${EMULATION_NAME}.c
2387 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2388 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2389 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2390 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2391 sed $sc ldscripts/${EMULATION_NAME}.xdco >> e${EMULATION_NAME}.c
2392 fi
2393 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2394 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2395 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2396 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2397 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2398 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2399 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2400 sed $sc ldscripts/${EMULATION_NAME}.xdeo >> e${EMULATION_NAME}.c
2401 fi
2402 fi
2403 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2404 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2405 sed $sc ldscripts/${EMULATION_NAME}.xde >> e${EMULATION_NAME}.c
2406 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2407 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2408 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2409 sed $sc ldscripts/${EMULATION_NAME}.xdo >> e${EMULATION_NAME}.c
2410 fi
2411 echo ' ; else if (bfd_link_pie (&link_info)) return' >> e${EMULATION_NAME}.c
2412 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2413 fi
2414 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2415 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2416 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2417 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2418 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2419 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2420 sed $sc ldscripts/${EMULATION_NAME}.xswe >> e${EMULATION_NAME}.c
2421 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2422 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2423 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2424 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2425 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2426 if test -n "$GENERATE_RELRO_SCRIPT" ; then
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.separate_code' >> e${EMULATION_NAME}.c
2430 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2431 sed $sc ldscripts/${EMULATION_NAME}.xsceo >> e${EMULATION_NAME}.c
2432 fi
2433 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2434 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2435 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2436 sed $sc ldscripts/${EMULATION_NAME}.xsce >> e${EMULATION_NAME}.c
2437 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2438 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2439 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2440 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2441 sed $sc ldscripts/${EMULATION_NAME}.xsco >> e${EMULATION_NAME}.c
2442 fi
2443 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2444 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2445 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2446 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2447 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2448 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2449 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2450 sed $sc ldscripts/${EMULATION_NAME}.xseo >> e${EMULATION_NAME}.c
2451 fi
2452 fi
2453 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2454 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2455 sed $sc ldscripts/${EMULATION_NAME}.xse >> e${EMULATION_NAME}.c
2456 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2457 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2458 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2459 sed $sc ldscripts/${EMULATION_NAME}.xso >> e${EMULATION_NAME}.c
2460 fi
2461 echo ' ; else if (bfd_link_dll (&link_info)) return' >> e${EMULATION_NAME}.c
2462 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2463 fi
2464 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2465 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2466 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2467 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2468 sed $sc ldscripts/${EMULATION_NAME}.xwe >> e${EMULATION_NAME}.c
2469 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2470 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2471 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2472 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2473 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2474 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2475 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2476 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2477 sed $sc ldscripts/${EMULATION_NAME}.xceo >> e${EMULATION_NAME}.c
2478 fi
2479 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2480 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2481 sed $sc ldscripts/${EMULATION_NAME}.xce >> e${EMULATION_NAME}.c
2482 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2483 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2484 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2485 sed $sc ldscripts/${EMULATION_NAME}.xco >> e${EMULATION_NAME}.c
2486 fi
2487 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2488 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2489 fi
2490 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2491 echo ' ; else if (link_info.separate_code' >> e${EMULATION_NAME}.c
2492 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2493 sed $sc ldscripts/${EMULATION_NAME}.xeo >> e${EMULATION_NAME}.c
2494 fi
2495 echo ' ; else if (link_info.separate_code) return' >> e${EMULATION_NAME}.c
2496 sed $sc ldscripts/${EMULATION_NAME}.xe >> e${EMULATION_NAME}.c
2497 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2498 echo ' ; else if (link_info.relro) return' >> e${EMULATION_NAME}.c
2499 sed $sc ldscripts/${EMULATION_NAME}.xo >> e${EMULATION_NAME}.c
2500 fi
2501 echo ' ; else return' >> e${EMULATION_NAME}.c
2502 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2503 echo '; }' >> e${EMULATION_NAME}.c
2504
2505 else
2506 # Scripts read from the filesystem.
2507
2508 fragment <<EOF
2509 {
2510 *isfile = 1;
2511
2512 if (bfd_link_relocatable (&link_info) && config.build_constructors)
2513 return "ldscripts/${EMULATION_NAME}.xu";
2514 else if (bfd_link_relocatable (&link_info))
2515 return "ldscripts/${EMULATION_NAME}.xr";
2516 else if (!config.text_read_only)
2517 return "ldscripts/${EMULATION_NAME}.xbn";
2518 EOF
2519 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2520 else
2521 fragment <<EOF
2522 else if (!config.magic_demand_paged)
2523 return "ldscripts/${EMULATION_NAME}.xn";
2524 EOF
2525 fi
2526 if test -n "$GENERATE_PIE_SCRIPT" ; then
2527 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2528 fragment <<EOF
2529 else if (bfd_link_pie (&link_info)
2530 && link_info.combreloc
2531 && link_info.relro
2532 && (link_info.flags & DF_BIND_NOW))
2533 {
2534 if (link_info.separate_code)
2535 return "ldscripts/${EMULATION_NAME}.xdwe";
2536 else
2537 return "ldscripts/${EMULATION_NAME}.xdw";
2538 }
2539 EOF
2540 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2541 fragment <<EOF
2542 else if (bfd_link_pie (&link_info)
2543 && link_info.combreloc
2544 && link_info.relro)
2545 {
2546 if (link_info.separate_code)
2547 return "ldscripts/${EMULATION_NAME}.xdceo";
2548 else
2549 return "ldscripts/${EMULATION_NAME}.xdco";
2550 }
2551 EOF
2552 fi
2553 fragment <<EOF
2554 else if (bfd_link_pie (&link_info)
2555 && link_info.combreloc)
2556 {
2557 if (link_info.separate_code)
2558 return "ldscripts/${EMULATION_NAME}.xdce";
2559 else
2560 return "ldscripts/${EMULATION_NAME}.xdc";
2561 }
2562 EOF
2563 fi
2564 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2565 fragment <<EOF
2566 else if (bfd_link_pie (&link_info)
2567 && link_info.relro)
2568 {
2569 if (link_info.separate_code)
2570 return "ldscripts/${EMULATION_NAME}.xdeo";
2571 else
2572 return "ldscripts/${EMULATION_NAME}.xdo";
2573 }
2574 EOF
2575 fi
2576 fragment <<EOF
2577 else if (bfd_link_pie (&link_info))
2578 {
2579 if (link_info.separate_code)
2580 return "ldscripts/${EMULATION_NAME}.xde";
2581 else
2582 return "ldscripts/${EMULATION_NAME}.xd";
2583 }
2584 EOF
2585 fi
2586 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2587 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2588 fragment <<EOF
2589 else if (bfd_link_dll (&link_info) && link_info.combreloc
2590 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2591 {
2592 if (link_info.separate_code)
2593 return "ldscripts/${EMULATION_NAME}.xswe";
2594 else
2595 return "ldscripts/${EMULATION_NAME}.xsw";
2596 }
2597 EOF
2598 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2599 fragment <<EOF
2600 else if (bfd_link_dll (&link_info)
2601 && link_info.combreloc
2602 && link_info.relro)
2603 {
2604 if (link_info.separate_code)
2605 return "ldscripts/${EMULATION_NAME}.xsceo";
2606 else
2607 return "ldscripts/${EMULATION_NAME}.xsco";
2608 }
2609 EOF
2610 fi
2611 fragment <<EOF
2612 else if (bfd_link_dll (&link_info) && link_info.combreloc)
2613 {
2614 if (link_info.separate_code)
2615 return "ldscripts/${EMULATION_NAME}.xsce";
2616 else
2617 return "ldscripts/${EMULATION_NAME}.xsc";
2618 }
2619 EOF
2620 fi
2621 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2622 fragment <<EOF
2623 else if (bfd_link_dll (&link_info)
2624 && link_info.relro)
2625 {
2626 if (link_info.separate_code)
2627 return "ldscripts/${EMULATION_NAME}.xseo";
2628 else
2629 return "ldscripts/${EMULATION_NAME}.xso";
2630 }
2631 EOF
2632 fi
2633 fragment <<EOF
2634 else if (bfd_link_dll (&link_info))
2635 {
2636 if (link_info.separate_code)
2637 return "ldscripts/${EMULATION_NAME}.xse";
2638 else
2639 return "ldscripts/${EMULATION_NAME}.xs";
2640 }
2641 EOF
2642 fi
2643 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2644 fragment <<EOF
2645 else if (link_info.combreloc && link_info.relro
2646 && (link_info.flags & DF_BIND_NOW))
2647 {
2648 if (link_info.separate_code)
2649 return "ldscripts/${EMULATION_NAME}.xwe";
2650 else
2651 return "ldscripts/${EMULATION_NAME}.xw";
2652 }
2653 EOF
2654 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2655 fragment <<EOF
2656 else if (link_info.combreloc
2657 && link_info.relro)
2658 {
2659 if (link_info.separate_code)
2660 return "ldscripts/${EMULATION_NAME}.xceo";
2661 else
2662 return "ldscripts/${EMULATION_NAME}.xco";
2663 }
2664 EOF
2665 fi
2666 fragment <<EOF
2667 else if (link_info.combreloc)
2668 {
2669 if (link_info.separate_code)
2670 return "ldscripts/${EMULATION_NAME}.xce";
2671 else
2672 return "ldscripts/${EMULATION_NAME}.xc";
2673 }
2674 EOF
2675 fi
2676 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2677 fragment <<EOF
2678 else if (link_info.relro)
2679 {
2680 if (link_info.separate_code)
2681 return "ldscripts/${EMULATION_NAME}.xeo";
2682 else
2683 return "ldscripts/${EMULATION_NAME}.xo";
2684 }
2685 EOF
2686 fi
2687 fragment <<EOF
2688 else
2689 {
2690 if (link_info.separate_code)
2691 return "ldscripts/${EMULATION_NAME}.xe";
2692 else
2693 return "ldscripts/${EMULATION_NAME}.x";
2694 }
2695 }
2696
2697 EOF
2698 fi
2699 fi
2700
2701 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2702 fragment <<EOF
2703 $PARSE_AND_LIST_PROLOGUE
2704 EOF
2705 fi
2706
2707 fragment <<EOF
2708
2709 enum elf_options
2710 {
2711 OPTION_DISABLE_NEW_DTAGS = 400,
2712 OPTION_ENABLE_NEW_DTAGS,
2713 OPTION_GROUP,
2714 OPTION_EH_FRAME_HDR,
2715 OPTION_NO_EH_FRAME_HDR,
2716 OPTION_EXCLUDE_LIBS,
2717 OPTION_HASH_STYLE,
2718 OPTION_BUILD_ID,
2719 OPTION_AUDIT,
2720 OPTION_COMPRESS_DEBUG
2721 };
2722
2723 static void
2724 gld${EMULATION_NAME}_add_options
2725 (int ns, char **shortopts, int nl, struct option **longopts,
2726 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2727 {
2728 EOF
2729 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2730 fragment <<EOF
2731 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2732 EOF
2733 else
2734 fragment <<EOF
2735 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2736 EOF
2737 fi
2738 fragment <<EOF
2739 static const struct option xtra_long[] = {
2740 EOF
2741 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2742 fragment <<EOF
2743 {"audit", required_argument, NULL, OPTION_AUDIT},
2744 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2745 EOF
2746 fi
2747 fragment <<EOF
2748 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2749 {"compress-debug-sections", required_argument, NULL, OPTION_COMPRESS_DEBUG},
2750 EOF
2751 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2752 fragment <<EOF
2753 {"depaudit", required_argument, NULL, 'P'},
2754 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2755 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2756 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2757 {"no-eh-frame-hdr", no_argument, NULL, OPTION_NO_EH_FRAME_HDR},
2758 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2759 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2760 EOF
2761 fi
2762 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2763 fragment <<EOF
2764 $PARSE_AND_LIST_LONGOPTS
2765 EOF
2766 fi
2767 fragment <<EOF
2768 {NULL, no_argument, NULL, 0}
2769 };
2770
2771 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2772 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2773 *longopts = (struct option *)
2774 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2775 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2776 }
2777
2778 #define DEFAULT_BUILD_ID_STYLE "sha1"
2779
2780 static bfd_boolean
2781 gld${EMULATION_NAME}_handle_option (int optc)
2782 {
2783 switch (optc)
2784 {
2785 default:
2786 return FALSE;
2787
2788 case OPTION_BUILD_ID:
2789 if (emit_note_gnu_build_id != NULL)
2790 {
2791 free ((char *) emit_note_gnu_build_id);
2792 emit_note_gnu_build_id = NULL;
2793 }
2794 if (optarg == NULL)
2795 optarg = DEFAULT_BUILD_ID_STYLE;
2796 if (strcmp (optarg, "none"))
2797 emit_note_gnu_build_id = xstrdup (optarg);
2798 break;
2799
2800 case OPTION_COMPRESS_DEBUG:
2801 if (strcasecmp (optarg, "none") == 0)
2802 link_info.compress_debug = COMPRESS_DEBUG_NONE;
2803 else if (strcasecmp (optarg, "zlib") == 0)
2804 link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
2805 else if (strcasecmp (optarg, "zlib-gnu") == 0)
2806 link_info.compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
2807 else if (strcasecmp (optarg, "zlib-gabi") == 0)
2808 link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
2809 else
2810 einfo (_("%F%P: invalid --compress-debug-sections option: \`%s'\n"),
2811 optarg);
2812 break;
2813 EOF
2814
2815 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2816 fragment <<EOF
2817 case OPTION_AUDIT:
2818 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2819 break;
2820
2821 case 'P':
2822 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2823 break;
2824
2825 case OPTION_DISABLE_NEW_DTAGS:
2826 link_info.new_dtags = FALSE;
2827 break;
2828
2829 case OPTION_ENABLE_NEW_DTAGS:
2830 link_info.new_dtags = TRUE;
2831 break;
2832
2833 case OPTION_EH_FRAME_HDR:
2834 link_info.eh_frame_hdr_type = DWARF2_EH_HDR;
2835 break;
2836
2837 case OPTION_NO_EH_FRAME_HDR:
2838 link_info.eh_frame_hdr_type = 0;
2839 break;
2840
2841 case OPTION_GROUP:
2842 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2843 /* Groups must be self-contained. */
2844 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2845 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2846 break;
2847
2848 case OPTION_EXCLUDE_LIBS:
2849 add_excluded_libs (optarg);
2850 break;
2851
2852 case OPTION_HASH_STYLE:
2853 link_info.emit_hash = FALSE;
2854 link_info.emit_gnu_hash = FALSE;
2855 if (strcmp (optarg, "sysv") == 0)
2856 link_info.emit_hash = TRUE;
2857 else if (strcmp (optarg, "gnu") == 0)
2858 link_info.emit_gnu_hash = TRUE;
2859 else if (strcmp (optarg, "both") == 0)
2860 {
2861 link_info.emit_hash = TRUE;
2862 link_info.emit_gnu_hash = TRUE;
2863 }
2864 else
2865 einfo (_("%F%P: invalid hash style \`%s'\n"), optarg);
2866 break;
2867
2868 EOF
2869 fi
2870 fragment <<EOF
2871 case 'z':
2872 if (strcmp (optarg, "defs") == 0)
2873 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2874 else if (strcmp (optarg, "undefs") == 0)
2875 link_info.unresolved_syms_in_objects = RM_IGNORE;
2876 else if (strcmp (optarg, "muldefs") == 0)
2877 link_info.allow_multiple_definition = TRUE;
2878 else if (CONST_STRNEQ (optarg, "max-page-size="))
2879 {
2880 char *end;
2881
2882 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2883 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2884 einfo (_("%F%P: invalid maximum page size \`%s'\n"),
2885 optarg + 14);
2886 }
2887 else if (CONST_STRNEQ (optarg, "common-page-size="))
2888 {
2889 char *end;
2890 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2891 if (*end
2892 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2893 einfo (_("%F%P: invalid common page size \`%s'\n"),
2894 optarg + 17);
2895 }
2896 else if (CONST_STRNEQ (optarg, "stack-size="))
2897 {
2898 char *end;
2899 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2900 if (*end || link_info.stacksize < 0)
2901 einfo (_("%F%P: invalid stack size \`%s'\n"), optarg + 11);
2902 if (!link_info.stacksize)
2903 /* Use -1 for explicit no-stack, because zero means
2904 'default'. */
2905 link_info.stacksize = -1;
2906 }
2907 else if (strcmp (optarg, "execstack") == 0)
2908 {
2909 link_info.execstack = TRUE;
2910 link_info.noexecstack = FALSE;
2911 }
2912 else if (strcmp (optarg, "noexecstack") == 0)
2913 {
2914 link_info.noexecstack = TRUE;
2915 link_info.execstack = FALSE;
2916 }
2917 else if (strcmp (optarg, "globalaudit") == 0)
2918 {
2919 link_info.flags_1 |= DF_1_GLOBAUDIT;
2920 }
2921 EOF
2922
2923 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2924 fragment <<EOF
2925 else if (strcmp (optarg, "global") == 0)
2926 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2927 else if (strcmp (optarg, "initfirst") == 0)
2928 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2929 else if (strcmp (optarg, "interpose") == 0)
2930 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2931 else if (strcmp (optarg, "loadfltr") == 0)
2932 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2933 else if (strcmp (optarg, "nodefaultlib") == 0)
2934 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2935 else if (strcmp (optarg, "nodelete") == 0)
2936 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2937 else if (strcmp (optarg, "nodlopen") == 0)
2938 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2939 else if (strcmp (optarg, "nodump") == 0)
2940 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2941 else if (strcmp (optarg, "now") == 0)
2942 {
2943 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2944 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2945 }
2946 else if (strcmp (optarg, "lazy") == 0)
2947 {
2948 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2949 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2950 }
2951 else if (strcmp (optarg, "origin") == 0)
2952 {
2953 link_info.flags |= (bfd_vma) DF_ORIGIN;
2954 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2955 }
2956 else if (strcmp (optarg, "combreloc") == 0)
2957 link_info.combreloc = TRUE;
2958 else if (strcmp (optarg, "nocombreloc") == 0)
2959 link_info.combreloc = FALSE;
2960 else if (strcmp (optarg, "nocopyreloc") == 0)
2961 link_info.nocopyreloc = TRUE;
2962 else if (strcmp (optarg, "relro") == 0)
2963 link_info.relro = TRUE;
2964 else if (strcmp (optarg, "norelro") == 0)
2965 link_info.relro = FALSE;
2966 else if (strcmp (optarg, "separate-code") == 0)
2967 link_info.separate_code = TRUE;
2968 else if (strcmp (optarg, "noseparate-code") == 0)
2969 link_info.separate_code = FALSE;
2970 else if (strcmp (optarg, "common") == 0)
2971 link_info.elf_stt_common = elf_stt_common;
2972 else if (strcmp (optarg, "nocommon") == 0)
2973 link_info.elf_stt_common = no_elf_stt_common;
2974 else if (strcmp (optarg, "text") == 0)
2975 link_info.error_textrel = TRUE;
2976 else if (strcmp (optarg, "notext") == 0)
2977 link_info.error_textrel = FALSE;
2978 else if (strcmp (optarg, "textoff") == 0)
2979 link_info.error_textrel = FALSE;
2980 EOF
2981 fi
2982
2983 if test -n "$PARSE_AND_LIST_ARGS_CASE_Z" ; then
2984 fragment <<EOF
2985 $PARSE_AND_LIST_ARGS_CASE_Z
2986 EOF
2987 fi
2988
2989 fragment <<EOF
2990 else
2991 einfo (_("%P: warning: -z %s ignored\n"), optarg);
2992 break;
2993 EOF
2994
2995 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2996 fragment <<EOF
2997 $PARSE_AND_LIST_ARGS_CASES
2998 EOF
2999 fi
3000
3001 fragment <<EOF
3002 }
3003
3004 return TRUE;
3005 }
3006
3007 EOF
3008
3009 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
3010 gld_list_options="gld${EMULATION_NAME}_list_options"
3011 if test -n "$PARSE_AND_LIST_OPTIONS"; then
3012 fragment <<EOF
3013
3014 static void
3015 gld${EMULATION_NAME}_list_options (FILE * file)
3016 {
3017 EOF
3018
3019 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
3020 fragment <<EOF
3021 $PARSE_AND_LIST_OPTIONS
3022 EOF
3023 fi
3024
3025 fragment <<EOF
3026 }
3027 EOF
3028 else
3029 gld_list_options="NULL"
3030 fi
3031
3032 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
3033 fragment <<EOF
3034 $PARSE_AND_LIST_EPILOGUE
3035 EOF
3036 fi
3037 fi
3038
3039 fragment <<EOF
3040
3041 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
3042 {
3043 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
3044 ${LDEMUL_SYSLIB-syslib_default},
3045 ${LDEMUL_HLL-hll_default},
3046 ${LDEMUL_AFTER_PARSE-gld${EMULATION_NAME}_after_parse},
3047 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
3048 ${LDEMUL_AFTER_CHECK_RELOCS-after_check_relocs_default},
3049 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
3050 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
3051 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
3052 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
3053 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
3054 "${EMULATION_NAME}",
3055 "${OUTPUT_FORMAT}",
3056 ${LDEMUL_FINISH-finish_default},
3057 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
3058 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
3059 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
3060 ${LDEMUL_SET_SYMBOLS-NULL},
3061 ${LDEMUL_PARSE_ARGS-NULL},
3062 gld${EMULATION_NAME}_add_options,
3063 gld${EMULATION_NAME}_handle_option,
3064 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
3065 ${LDEMUL_LIST_OPTIONS-${gld_list_options}},
3066 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
3067 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
3068 ${LDEMUL_NEW_VERS_PATTERN-NULL},
3069 ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL}
3070 };
3071 EOF
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