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