PR23566, false uninitialized warning
[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 elf_link_hash_entry *ehdr_start = NULL;
1693 struct bfd_link_hash_entry ehdr_start_save;
1694
1695 /* The memset is here only to silence brain-dead compiler warnings
1696 that the variable may be used uninitialized. */
1697 memset (&ehdr_start_save, 0, sizeof ehdr_start_save);
1698 if (is_elf_hash_table (link_info.hash))
1699 {
1700 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1701
1702 /* Make __ehdr_start hidden if it has been referenced, to
1703 prevent the symbol from being dynamic. */
1704 if (!bfd_link_relocatable (&link_info))
1705 {
1706 struct elf_link_hash_table *htab = elf_hash_table (&link_info);
1707 struct elf_link_hash_entry *h
1708 = elf_link_hash_lookup (htab, "__ehdr_start", FALSE, FALSE, TRUE);
1709
1710 /* Only adjust the export class if the symbol was referenced
1711 and not defined, otherwise leave it alone. */
1712 if (h != NULL
1713 && (h->root.type == bfd_link_hash_new
1714 || h->root.type == bfd_link_hash_undefined
1715 || h->root.type == bfd_link_hash_undefweak
1716 || h->root.type == bfd_link_hash_common))
1717 {
1718 const struct elf_backend_data *bed;
1719 bed = get_elf_backend_data (link_info.output_bfd);
1720 (*bed->elf_backend_hide_symbol) (&link_info, h, TRUE);
1721 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
1722 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
1723 /* Don't leave the symbol undefined. Undefined hidden
1724 symbols typically won't have dynamic relocations, but
1725 we most likely will need dynamic relocations for
1726 __ehdr_start if we are building a PIE or shared
1727 library. */
1728 ehdr_start = h;
1729 ehdr_start_save = h->root;
1730 h->root.type = bfd_link_hash_defined;
1731 h->root.u.def.section = bfd_abs_section_ptr;
1732 h->root.u.def.value = 0;
1733 }
1734 }
1735
1736 /* If we are going to make any variable assignments, we need to
1737 let the ELF backend know about them in case the variables are
1738 referred to by dynamic objects. */
1739 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1740 }
1741
1742 /* Let the ELF backend work out the sizes of any sections required
1743 by dynamic linking. */
1744 rpath = command_line.rpath;
1745 if (rpath == NULL)
1746 rpath = (const char *) getenv ("LD_RUN_PATH");
1747
1748 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1749 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1750 {
1751 const char *audit_libs = elf_dt_audit (abfd);
1752
1753 /* If the input bfd contains an audit entry, we need to add it as
1754 a dep audit entry. */
1755 if (audit_libs && *audit_libs != '\0')
1756 {
1757 char *cp = xstrdup (audit_libs);
1758 do
1759 {
1760 int more = 0;
1761 char *cp2 = strchr (cp, config.rpath_separator);
1762
1763 if (cp2)
1764 {
1765 *cp2 = '\0';
1766 more = 1;
1767 }
1768
1769 if (cp != NULL && *cp != '\0')
1770 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1771
1772 cp = more ? ++cp2 : NULL;
1773 }
1774 while (cp != NULL);
1775 }
1776 }
1777
1778 if (! (bfd_elf_size_dynamic_sections
1779 (link_info.output_bfd, command_line.soname, rpath,
1780 command_line.filter_shlib, audit, depaudit,
1781 (const char * const *) command_line.auxiliary_filters,
1782 &link_info, &sinterp)))
1783 einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
1784
1785 ${ELF_INTERPRETER_SET_DEFAULT}
1786 /* Let the user override the dynamic linker we are using. */
1787 if (command_line.interpreter != NULL
1788 && sinterp != NULL)
1789 {
1790 sinterp->contents = (bfd_byte *) command_line.interpreter;
1791 sinterp->size = strlen (command_line.interpreter) + 1;
1792 }
1793
1794 /* Look for any sections named .gnu.warning. As a GNU extensions,
1795 we treat such sections as containing warning messages. We print
1796 out the warning message, and then zero out the section size so
1797 that it does not get copied into the output file. */
1798
1799 {
1800 LANG_FOR_EACH_INPUT_STATEMENT (is)
1801 {
1802 asection *s;
1803 bfd_size_type sz;
1804 char *msg;
1805
1806 if (is->flags.just_syms)
1807 continue;
1808
1809 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1810 if (s == NULL)
1811 continue;
1812
1813 sz = s->size;
1814 msg = (char *) xmalloc ((size_t) (sz + 1));
1815 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1816 (file_ptr) 0, sz))
1817 einfo (_("%F%P: %pB: can't read contents of section .gnu.warning: %E\n"),
1818 is->the_bfd);
1819 msg[sz] = '\0';
1820 (*link_info.callbacks->warning) (&link_info, msg,
1821 (const char *) NULL, is->the_bfd,
1822 (asection *) NULL, (bfd_vma) 0);
1823 free (msg);
1824
1825 /* Clobber the section size, so that we don't waste space
1826 copying the warning into the output file. If we've already
1827 sized the output section, adjust its size. The adjustment
1828 is on rawsize because targets that size sections early will
1829 have called lang_reset_memory_regions after sizing. */
1830 if (s->output_section != NULL
1831 && s->output_section->rawsize >= s->size)
1832 s->output_section->rawsize -= s->size;
1833
1834 s->size = 0;
1835
1836 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1837 warning section don't get copied to the output. */
1838 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1839 }
1840 }
1841
1842 before_allocation_default ();
1843
1844 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1845 einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
1846
1847 if (ehdr_start != NULL)
1848 {
1849 /* If we twiddled __ehdr_start to defined earlier, put it back
1850 as it was. */
1851 ehdr_start->root.type = ehdr_start_save.type;
1852 ehdr_start->root.u = ehdr_start_save.u;
1853 }
1854 }
1855
1856 EOF
1857 fi
1858
1859 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1860 fragment <<EOF
1861
1862 /* Try to open a dynamic archive. This is where we know that ELF
1863 dynamic libraries have an extension of .so (or .sl on oddball systems
1864 like hpux). */
1865
1866 static bfd_boolean
1867 gld${EMULATION_NAME}_open_dynamic_archive
1868 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1869 {
1870 const char *filename;
1871 char *string;
1872 size_t len;
1873 bfd_boolean opened = FALSE;
1874
1875 if (! entry->flags.maybe_archive)
1876 return FALSE;
1877
1878 filename = entry->filename;
1879 len = strlen (search->name) + strlen (filename);
1880 if (entry->flags.full_name_provided)
1881 {
1882 len += sizeof "/";
1883 string = (char *) xmalloc (len);
1884 sprintf (string, "%s/%s", search->name, filename);
1885 }
1886 else
1887 {
1888 size_t xlen = 0;
1889
1890 len += strlen (arch) + sizeof "/lib.so";
1891 #ifdef EXTRA_SHLIB_EXTENSION
1892 xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
1893 ? strlen (EXTRA_SHLIB_EXTENSION) - 3
1894 : 0);
1895 #endif
1896 string = (char *) xmalloc (len + xlen);
1897 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1898 #ifdef EXTRA_SHLIB_EXTENSION
1899 /* Try the .so extension first. If that fails build a new filename
1900 using EXTRA_SHLIB_EXTENSION. */
1901 opened = ldfile_try_open_bfd (string, entry);
1902 if (!opened)
1903 strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
1904 #endif
1905 }
1906
1907 if (!opened && !ldfile_try_open_bfd (string, entry))
1908 {
1909 free (string);
1910 return FALSE;
1911 }
1912
1913 entry->filename = string;
1914
1915 /* We have found a dynamic object to include in the link. The ELF
1916 backend linker will create a DT_NEEDED entry in the .dynamic
1917 section naming this file. If this file includes a DT_SONAME
1918 entry, it will be used. Otherwise, the ELF linker will just use
1919 the name of the file. For an archive found by searching, like
1920 this one, the DT_NEEDED entry should consist of just the name of
1921 the file, without the path information used to find it. Note
1922 that we only need to do this if we have a dynamic object; an
1923 archive will never be referenced by a DT_NEEDED entry.
1924
1925 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1926 very pretty. I haven't been able to think of anything that is
1927 pretty, though. */
1928 if (bfd_check_format (entry->the_bfd, bfd_object)
1929 && (entry->the_bfd->flags & DYNAMIC) != 0)
1930 {
1931 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1932
1933 /* Rather than duplicating the logic above. Just use the
1934 filename we recorded earlier. */
1935
1936 if (!entry->flags.full_name_provided)
1937 filename = lbasename (entry->filename);
1938 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1939 }
1940
1941 return TRUE;
1942 }
1943
1944 EOF
1945 fi
1946
1947 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1948 fragment <<EOF
1949
1950 /* A variant of lang_output_section_find used by place_orphan. */
1951
1952 static lang_output_section_statement_type *
1953 output_rel_find (asection *sec, int isdyn)
1954 {
1955 lang_output_section_statement_type *lookup;
1956 lang_output_section_statement_type *last = NULL;
1957 lang_output_section_statement_type *last_alloc = NULL;
1958 lang_output_section_statement_type *last_ro_alloc = NULL;
1959 lang_output_section_statement_type *last_rel = NULL;
1960 lang_output_section_statement_type *last_rel_alloc = NULL;
1961 int rela = sec->name[4] == 'a';
1962
1963 for (lookup = &lang_output_section_statement.head->output_section_statement;
1964 lookup != NULL;
1965 lookup = lookup->next)
1966 {
1967 if (lookup->constraint >= 0
1968 && CONST_STRNEQ (lookup->name, ".rel"))
1969 {
1970 int lookrela = lookup->name[4] == 'a';
1971
1972 /* .rel.dyn must come before all other reloc sections, to suit
1973 GNU ld.so. */
1974 if (isdyn)
1975 break;
1976
1977 /* Don't place after .rel.plt as doing so results in wrong
1978 dynamic tags. */
1979 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1980 break;
1981
1982 if (rela == lookrela || last_rel == NULL)
1983 last_rel = lookup;
1984 if ((rela == lookrela || last_rel_alloc == NULL)
1985 && lookup->bfd_section != NULL
1986 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1987 last_rel_alloc = lookup;
1988 }
1989
1990 last = lookup;
1991 if (lookup->bfd_section != NULL
1992 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1993 {
1994 last_alloc = lookup;
1995 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1996 last_ro_alloc = lookup;
1997 }
1998 }
1999
2000 if (last_rel_alloc)
2001 return last_rel_alloc;
2002
2003 if (last_rel)
2004 return last_rel;
2005
2006 if (last_ro_alloc)
2007 return last_ro_alloc;
2008
2009 if (last_alloc)
2010 return last_alloc;
2011
2012 return last;
2013 }
2014
2015 /* Return whether IN is suitable to be part of OUT. */
2016
2017 static bfd_boolean
2018 elf_orphan_compatible (asection *in, asection *out)
2019 {
2020 /* Non-zero sh_info implies a section with SHF_INFO_LINK with
2021 unknown semantics for the generic linker, or a SHT_REL/SHT_RELA
2022 section where sh_info specifies a symbol table. (We won't see
2023 SHT_GROUP, SHT_SYMTAB or SHT_DYNSYM sections here.) We clearly
2024 can't merge SHT_REL/SHT_RELA using differing symbol tables, and
2025 shouldn't merge sections with differing unknown semantics. */
2026 if (elf_section_data (out)->this_hdr.sh_info
2027 != elf_section_data (in)->this_hdr.sh_info)
2028 return FALSE;
2029 /* We can't merge two sections with differing SHF_EXCLUDE when doing
2030 a relocatable link. */
2031 if (bfd_link_relocatable (&link_info)
2032 && ((elf_section_flags (out) ^ elf_section_flags (in)) & SHF_EXCLUDE) != 0)
2033 return FALSE;
2034 return _bfd_elf_match_sections_by_type (link_info.output_bfd, out,
2035 in->owner, in);
2036 }
2037
2038 /* Place an orphan section. We use this to put random SHF_ALLOC
2039 sections in the right segment. */
2040
2041 static lang_output_section_statement_type *
2042 gld${EMULATION_NAME}_place_orphan (asection *s,
2043 const char *secname,
2044 int constraint)
2045 {
2046 static struct orphan_save hold[] =
2047 {
2048 { ".text",
2049 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
2050 0, 0, 0, 0 },
2051 { ".rodata",
2052 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2053 0, 0, 0, 0 },
2054 { ".tdata",
2055 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
2056 0, 0, 0, 0 },
2057 { ".data",
2058 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
2059 0, 0, 0, 0 },
2060 { ".bss",
2061 SEC_ALLOC,
2062 0, 0, 0, 0 },
2063 { 0,
2064 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2065 0, 0, 0, 0 },
2066 { ".interp",
2067 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
2068 0, 0, 0, 0 },
2069 { ".sdata",
2070 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
2071 0, 0, 0, 0 },
2072 { ".comment",
2073 SEC_HAS_CONTENTS,
2074 0, 0, 0, 0 },
2075 };
2076 enum orphan_save_index
2077 {
2078 orphan_text = 0,
2079 orphan_rodata,
2080 orphan_tdata,
2081 orphan_data,
2082 orphan_bss,
2083 orphan_rel,
2084 orphan_interp,
2085 orphan_sdata,
2086 orphan_nonalloc
2087 };
2088 static int orphan_init_done = 0;
2089 struct orphan_save *place;
2090 lang_output_section_statement_type *after;
2091 lang_output_section_statement_type *os;
2092 lang_output_section_statement_type *match_by_name = NULL;
2093 int isdyn = 0;
2094 int elfinput = s->owner->xvec->flavour == bfd_target_elf_flavour;
2095 int elfoutput = link_info.output_bfd->xvec->flavour == bfd_target_elf_flavour;
2096 unsigned int sh_type = elfinput ? elf_section_type (s) : SHT_NULL;
2097 flagword flags;
2098 asection *nexts;
2099
2100 if (!bfd_link_relocatable (&link_info)
2101 && link_info.combreloc
2102 && (s->flags & SEC_ALLOC))
2103 {
2104 if (elfinput)
2105 switch (sh_type)
2106 {
2107 case SHT_RELA:
2108 secname = ".rela.dyn";
2109 isdyn = 1;
2110 break;
2111 case SHT_REL:
2112 secname = ".rel.dyn";
2113 isdyn = 1;
2114 break;
2115 default:
2116 break;
2117 }
2118 else if (CONST_STRNEQ (secname, ".rel"))
2119 {
2120 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
2121 isdyn = 1;
2122 }
2123 }
2124
2125 if (!bfd_link_relocatable (&link_info)
2126 && elfinput
2127 && elfoutput
2128 && (s->flags & SEC_ALLOC) != 0
2129 && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
2130 {
2131 /* Find the output mbind section with the same type, attributes
2132 and sh_info field. */
2133 for (os = &lang_output_section_statement.head->output_section_statement;
2134 os != NULL;
2135 os = os->next)
2136 if (os->bfd_section != NULL
2137 && !bfd_is_abs_section (os->bfd_section)
2138 && (elf_section_flags (os->bfd_section) & SHF_GNU_MBIND) != 0
2139 && ((s->flags & (SEC_ALLOC
2140 | SEC_LOAD
2141 | SEC_HAS_CONTENTS
2142 | SEC_READONLY
2143 | SEC_CODE))
2144 == (os->bfd_section->flags & (SEC_ALLOC
2145 | SEC_LOAD
2146 | SEC_HAS_CONTENTS
2147 | SEC_READONLY
2148 | SEC_CODE)))
2149 && (elf_section_data (os->bfd_section)->this_hdr.sh_info
2150 == elf_section_data (s)->this_hdr.sh_info))
2151 {
2152 lang_add_section (&os->children, s, NULL, os);
2153 return os;
2154 }
2155
2156 /* Create the output mbind section with the ".mbind." prefix
2157 in section name. */
2158 if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2159 secname = ".mbind.bss";
2160 else if ((s->flags & SEC_READONLY) == 0)
2161 secname = ".mbind.data";
2162 else if ((s->flags & SEC_CODE) == 0)
2163 secname = ".mbind.rodata";
2164 else
2165 secname = ".mbind.text";
2166 }
2167
2168 /* Look through the script to see where to place this section. The
2169 script includes entries added by previous lang_insert_orphan
2170 calls, so this loop puts multiple compatible orphans of the same
2171 name into a single output section. */
2172 if (constraint == 0)
2173 for (os = lang_output_section_find (secname);
2174 os != NULL;
2175 os = next_matching_output_section_statement (os, 0))
2176 {
2177 /* If we don't match an existing output section, tell
2178 lang_insert_orphan to create a new output section. */
2179 constraint = SPECIAL;
2180
2181 /* Check to see if we already have an output section statement
2182 with this name, and its bfd section has compatible flags.
2183 If the section already exists but does not have any flags
2184 set, then it has been created by the linker, possibly as a
2185 result of a --section-start command line switch. */
2186 if (os->bfd_section != NULL
2187 && (os->bfd_section->flags == 0
2188 || (((s->flags ^ os->bfd_section->flags)
2189 & (SEC_LOAD | SEC_ALLOC)) == 0
2190 && (!elfinput
2191 || !elfoutput
2192 || elf_orphan_compatible (s, os->bfd_section)))))
2193 {
2194 lang_add_section (&os->children, s, NULL, os);
2195 return os;
2196 }
2197
2198 /* Save unused output sections in case we can match them
2199 against orphans later. */
2200 if (os->bfd_section == NULL)
2201 match_by_name = os;
2202 }
2203
2204 /* If we didn't match an active output section, see if we matched an
2205 unused one and use that. */
2206 if (match_by_name)
2207 {
2208 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
2209 return match_by_name;
2210 }
2211
2212 if (!orphan_init_done)
2213 {
2214 struct orphan_save *ho;
2215
2216 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
2217 if (ho->name != NULL)
2218 {
2219 ho->os = lang_output_section_find (ho->name);
2220 if (ho->os != NULL && ho->os->flags == 0)
2221 ho->os->flags = ho->flags;
2222 }
2223 orphan_init_done = 1;
2224 }
2225
2226 /* If this is a final link, then always put .gnu.warning.SYMBOL
2227 sections into the .text section to get them out of the way. */
2228 if (bfd_link_executable (&link_info)
2229 && CONST_STRNEQ (s->name, ".gnu.warning.")
2230 && hold[orphan_text].os != NULL)
2231 {
2232 os = hold[orphan_text].os;
2233 lang_add_section (&os->children, s, NULL, os);
2234 return os;
2235 }
2236
2237 flags = s->flags;
2238 if (!bfd_link_relocatable (&link_info))
2239 {
2240 nexts = s;
2241 while ((nexts = bfd_get_next_section_by_name (nexts->owner, nexts))
2242 != NULL)
2243 if (nexts->output_section == NULL
2244 && (nexts->flags & SEC_EXCLUDE) == 0
2245 && ((nexts->flags ^ flags) & (SEC_LOAD | SEC_ALLOC)) == 0
2246 && (nexts->owner->flags & DYNAMIC) == 0
2247 && nexts->owner->usrdata != NULL
2248 && !(((lang_input_statement_type *) nexts->owner->usrdata)
2249 ->flags.just_syms)
2250 && _bfd_elf_match_sections_by_type (nexts->owner, nexts,
2251 s->owner, s))
2252 flags = (((flags ^ SEC_READONLY)
2253 | (nexts->flags ^ SEC_READONLY))
2254 ^ SEC_READONLY);
2255 }
2256
2257 /* Decide which segment the section should go in based on the
2258 section name and section flags. We put loadable .note sections
2259 right after the .interp section, so that the PT_NOTE segment is
2260 stored right after the program headers where the OS can read it
2261 in the first page. */
2262
2263 place = NULL;
2264 if ((flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
2265 place = &hold[orphan_nonalloc];
2266 else if ((flags & SEC_ALLOC) == 0)
2267 ;
2268 else if ((flags & SEC_LOAD) != 0
2269 && ((elfinput && sh_type == SHT_NOTE)
2270 || (!elfinput && CONST_STRNEQ (secname, ".note"))))
2271 place = &hold[orphan_interp];
2272 else if ((flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
2273 place = &hold[orphan_bss];
2274 else if ((flags & SEC_SMALL_DATA) != 0)
2275 place = &hold[orphan_sdata];
2276 else if ((flags & SEC_THREAD_LOCAL) != 0)
2277 place = &hold[orphan_tdata];
2278 else if ((flags & SEC_READONLY) == 0)
2279 place = &hold[orphan_data];
2280 else if (((elfinput && (sh_type == SHT_RELA || sh_type == SHT_REL))
2281 || (!elfinput && CONST_STRNEQ (secname, ".rel")))
2282 && (flags & SEC_LOAD) != 0)
2283 place = &hold[orphan_rel];
2284 else if ((flags & SEC_CODE) == 0)
2285 place = &hold[orphan_rodata];
2286 else
2287 place = &hold[orphan_text];
2288
2289 after = NULL;
2290 if (place != NULL)
2291 {
2292 if (place->os == NULL)
2293 {
2294 if (place->name != NULL)
2295 place->os = lang_output_section_find (place->name);
2296 else
2297 place->os = output_rel_find (s, isdyn);
2298 }
2299 after = place->os;
2300 if (after == NULL)
2301 after
2302 = lang_output_section_find_by_flags (s, flags, &place->os,
2303 _bfd_elf_match_sections_by_type);
2304 if (after == NULL)
2305 /* *ABS* is always the first output section statement. */
2306 after = &lang_output_section_statement.head->output_section_statement;
2307 }
2308
2309 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
2310 }
2311 EOF
2312 fi
2313
2314 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
2315 fragment <<EOF
2316
2317 static void
2318 gld${EMULATION_NAME}_after_allocation (void)
2319 {
2320 int need_layout = bfd_elf_discard_info (link_info.output_bfd, &link_info);
2321
2322 if (need_layout < 0)
2323 einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
2324 else
2325 gld${EMULATION_NAME}_map_segments (need_layout);
2326 }
2327 EOF
2328 fi
2329
2330 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
2331 fragment <<EOF
2332
2333 static char *
2334 gld${EMULATION_NAME}_get_script (int *isfile)
2335 EOF
2336
2337 if test x"$COMPILE_IN" = xyes
2338 then
2339 # Scripts compiled in.
2340
2341 # sed commands to quote an ld script as a C string.
2342 sc="-f stringify.sed"
2343
2344 fragment <<EOF
2345 {
2346 *isfile = 0;
2347
2348 if (bfd_link_relocatable (&link_info) && config.build_constructors)
2349 return
2350 EOF
2351 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2352 echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
2353 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2354 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2355 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2356 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2357 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2358 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2359 fi
2360 if test -n "$GENERATE_PIE_SCRIPT" ; then
2361 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2362 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2363 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2364 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2365 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2366 sed $sc ldscripts/${EMULATION_NAME}.xdwe >> e${EMULATION_NAME}.c
2367 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2368 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2369 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2370 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2371 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2372 if test -n "$GENERATE_RELRO_SCRIPT" ; then
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.separate_code' >> e${EMULATION_NAME}.c
2376 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2377 sed $sc ldscripts/${EMULATION_NAME}.xdceo >> e${EMULATION_NAME}.c
2378 fi
2379 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2380 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2381 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2382 sed $sc ldscripts/${EMULATION_NAME}.xdce >> e${EMULATION_NAME}.c
2383 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2384 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2385 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2386 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2387 sed $sc ldscripts/${EMULATION_NAME}.xdco >> e${EMULATION_NAME}.c
2388 fi
2389 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2390 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2391 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2392 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2393 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2394 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2395 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2396 sed $sc ldscripts/${EMULATION_NAME}.xdeo >> e${EMULATION_NAME}.c
2397 fi
2398 fi
2399 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2400 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2401 sed $sc ldscripts/${EMULATION_NAME}.xde >> e${EMULATION_NAME}.c
2402 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2403 echo ' ; else if (bfd_link_pie (&link_info)' >> e${EMULATION_NAME}.c
2404 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2405 sed $sc ldscripts/${EMULATION_NAME}.xdo >> e${EMULATION_NAME}.c
2406 fi
2407 echo ' ; else if (bfd_link_pie (&link_info)) return' >> e${EMULATION_NAME}.c
2408 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2409 fi
2410 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2411 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2412 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2413 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2414 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2415 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2416 sed $sc ldscripts/${EMULATION_NAME}.xswe >> e${EMULATION_NAME}.c
2417 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2418 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2419 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2420 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2421 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2422 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2423 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2424 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2425 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2426 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2427 sed $sc ldscripts/${EMULATION_NAME}.xsceo >> e${EMULATION_NAME}.c
2428 fi
2429 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2430 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2431 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2432 sed $sc ldscripts/${EMULATION_NAME}.xsce >> e${EMULATION_NAME}.c
2433 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2434 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2435 echo ' && link_info.combreloc' >> e${EMULATION_NAME}.c
2436 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2437 sed $sc ldscripts/${EMULATION_NAME}.xsco >> e${EMULATION_NAME}.c
2438 fi
2439 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2440 echo ' && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2441 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2442 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2443 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2444 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2445 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2446 sed $sc ldscripts/${EMULATION_NAME}.xseo >> e${EMULATION_NAME}.c
2447 fi
2448 fi
2449 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2450 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2451 sed $sc ldscripts/${EMULATION_NAME}.xse >> e${EMULATION_NAME}.c
2452 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2453 echo ' ; else if (bfd_link_dll (&link_info)' >> e${EMULATION_NAME}.c
2454 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2455 sed $sc ldscripts/${EMULATION_NAME}.xso >> e${EMULATION_NAME}.c
2456 fi
2457 echo ' ; else if (bfd_link_dll (&link_info)) return' >> e${EMULATION_NAME}.c
2458 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2459 fi
2460 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2461 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2462 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2463 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2464 sed $sc ldscripts/${EMULATION_NAME}.xwe >> e${EMULATION_NAME}.c
2465 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2466 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2467 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2468 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2469 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2470 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2471 echo ' && link_info.separate_code' >> e${EMULATION_NAME}.c
2472 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2473 sed $sc ldscripts/${EMULATION_NAME}.xceo >> e${EMULATION_NAME}.c
2474 fi
2475 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2476 echo ' && link_info.separate_code) return' >> e${EMULATION_NAME}.c
2477 sed $sc ldscripts/${EMULATION_NAME}.xce >> e${EMULATION_NAME}.c
2478 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2479 echo ' ; else if (link_info.combreloc' >> e${EMULATION_NAME}.c
2480 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2481 sed $sc ldscripts/${EMULATION_NAME}.xco >> e${EMULATION_NAME}.c
2482 fi
2483 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2484 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2485 fi
2486 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2487 echo ' ; else if (link_info.separate_code' >> e${EMULATION_NAME}.c
2488 echo ' && link_info.relro) return' >> e${EMULATION_NAME}.c
2489 sed $sc ldscripts/${EMULATION_NAME}.xeo >> e${EMULATION_NAME}.c
2490 fi
2491 echo ' ; else if (link_info.separate_code) return' >> e${EMULATION_NAME}.c
2492 sed $sc ldscripts/${EMULATION_NAME}.xe >> e${EMULATION_NAME}.c
2493 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2494 echo ' ; else if (link_info.relro) return' >> e${EMULATION_NAME}.c
2495 sed $sc ldscripts/${EMULATION_NAME}.xo >> e${EMULATION_NAME}.c
2496 fi
2497 echo ' ; else return' >> e${EMULATION_NAME}.c
2498 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2499 echo '; }' >> e${EMULATION_NAME}.c
2500
2501 else
2502 # Scripts read from the filesystem.
2503
2504 fragment <<EOF
2505 {
2506 *isfile = 1;
2507
2508 if (bfd_link_relocatable (&link_info) && config.build_constructors)
2509 return "ldscripts/${EMULATION_NAME}.xu";
2510 else if (bfd_link_relocatable (&link_info))
2511 return "ldscripts/${EMULATION_NAME}.xr";
2512 else if (!config.text_read_only)
2513 return "ldscripts/${EMULATION_NAME}.xbn";
2514 EOF
2515 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2516 else
2517 fragment <<EOF
2518 else if (!config.magic_demand_paged)
2519 return "ldscripts/${EMULATION_NAME}.xn";
2520 EOF
2521 fi
2522 if test -n "$GENERATE_PIE_SCRIPT" ; then
2523 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2524 fragment <<EOF
2525 else if (bfd_link_pie (&link_info)
2526 && link_info.combreloc
2527 && link_info.relro
2528 && (link_info.flags & DF_BIND_NOW))
2529 {
2530 if (link_info.separate_code)
2531 return "ldscripts/${EMULATION_NAME}.xdwe";
2532 else
2533 return "ldscripts/${EMULATION_NAME}.xdw";
2534 }
2535 EOF
2536 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2537 fragment <<EOF
2538 else if (bfd_link_pie (&link_info)
2539 && link_info.combreloc
2540 && link_info.relro)
2541 {
2542 if (link_info.separate_code)
2543 return "ldscripts/${EMULATION_NAME}.xdceo";
2544 else
2545 return "ldscripts/${EMULATION_NAME}.xdco";
2546 }
2547 EOF
2548 fi
2549 fragment <<EOF
2550 else if (bfd_link_pie (&link_info)
2551 && link_info.combreloc)
2552 {
2553 if (link_info.separate_code)
2554 return "ldscripts/${EMULATION_NAME}.xdce";
2555 else
2556 return "ldscripts/${EMULATION_NAME}.xdc";
2557 }
2558 EOF
2559 fi
2560 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2561 fragment <<EOF
2562 else if (bfd_link_pie (&link_info)
2563 && link_info.relro)
2564 {
2565 if (link_info.separate_code)
2566 return "ldscripts/${EMULATION_NAME}.xdeo";
2567 else
2568 return "ldscripts/${EMULATION_NAME}.xdo";
2569 }
2570 EOF
2571 fi
2572 fragment <<EOF
2573 else if (bfd_link_pie (&link_info))
2574 {
2575 if (link_info.separate_code)
2576 return "ldscripts/${EMULATION_NAME}.xde";
2577 else
2578 return "ldscripts/${EMULATION_NAME}.xd";
2579 }
2580 EOF
2581 fi
2582 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2583 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2584 fragment <<EOF
2585 else if (bfd_link_dll (&link_info) && link_info.combreloc
2586 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2587 {
2588 if (link_info.separate_code)
2589 return "ldscripts/${EMULATION_NAME}.xswe";
2590 else
2591 return "ldscripts/${EMULATION_NAME}.xsw";
2592 }
2593 EOF
2594 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2595 fragment <<EOF
2596 else if (bfd_link_dll (&link_info)
2597 && link_info.combreloc
2598 && link_info.relro)
2599 {
2600 if (link_info.separate_code)
2601 return "ldscripts/${EMULATION_NAME}.xsceo";
2602 else
2603 return "ldscripts/${EMULATION_NAME}.xsco";
2604 }
2605 EOF
2606 fi
2607 fragment <<EOF
2608 else if (bfd_link_dll (&link_info) && link_info.combreloc)
2609 {
2610 if (link_info.separate_code)
2611 return "ldscripts/${EMULATION_NAME}.xsce";
2612 else
2613 return "ldscripts/${EMULATION_NAME}.xsc";
2614 }
2615 EOF
2616 fi
2617 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2618 fragment <<EOF
2619 else if (bfd_link_dll (&link_info)
2620 && link_info.relro)
2621 {
2622 if (link_info.separate_code)
2623 return "ldscripts/${EMULATION_NAME}.xseo";
2624 else
2625 return "ldscripts/${EMULATION_NAME}.xso";
2626 }
2627 EOF
2628 fi
2629 fragment <<EOF
2630 else if (bfd_link_dll (&link_info))
2631 {
2632 if (link_info.separate_code)
2633 return "ldscripts/${EMULATION_NAME}.xse";
2634 else
2635 return "ldscripts/${EMULATION_NAME}.xs";
2636 }
2637 EOF
2638 fi
2639 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2640 fragment <<EOF
2641 else if (link_info.combreloc && link_info.relro
2642 && (link_info.flags & DF_BIND_NOW))
2643 {
2644 if (link_info.separate_code)
2645 return "ldscripts/${EMULATION_NAME}.xwe";
2646 else
2647 return "ldscripts/${EMULATION_NAME}.xw";
2648 }
2649 EOF
2650 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2651 fragment <<EOF
2652 else if (link_info.combreloc
2653 && link_info.relro)
2654 {
2655 if (link_info.separate_code)
2656 return "ldscripts/${EMULATION_NAME}.xceo";
2657 else
2658 return "ldscripts/${EMULATION_NAME}.xco";
2659 }
2660 EOF
2661 fi
2662 fragment <<EOF
2663 else if (link_info.combreloc)
2664 {
2665 if (link_info.separate_code)
2666 return "ldscripts/${EMULATION_NAME}.xce";
2667 else
2668 return "ldscripts/${EMULATION_NAME}.xc";
2669 }
2670 EOF
2671 fi
2672 if test -n "$GENERATE_RELRO_SCRIPT" ; then
2673 fragment <<EOF
2674 else if (link_info.relro)
2675 {
2676 if (link_info.separate_code)
2677 return "ldscripts/${EMULATION_NAME}.xeo";
2678 else
2679 return "ldscripts/${EMULATION_NAME}.xo";
2680 }
2681 EOF
2682 fi
2683 fragment <<EOF
2684 else
2685 {
2686 if (link_info.separate_code)
2687 return "ldscripts/${EMULATION_NAME}.xe";
2688 else
2689 return "ldscripts/${EMULATION_NAME}.x";
2690 }
2691 }
2692
2693 EOF
2694 fi
2695 fi
2696
2697 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2698 fragment <<EOF
2699 $PARSE_AND_LIST_PROLOGUE
2700 EOF
2701 fi
2702
2703 fragment <<EOF
2704
2705 enum elf_options
2706 {
2707 OPTION_DISABLE_NEW_DTAGS = 400,
2708 OPTION_ENABLE_NEW_DTAGS,
2709 OPTION_GROUP,
2710 OPTION_EH_FRAME_HDR,
2711 OPTION_NO_EH_FRAME_HDR,
2712 OPTION_EXCLUDE_LIBS,
2713 OPTION_HASH_STYLE,
2714 OPTION_BUILD_ID,
2715 OPTION_AUDIT,
2716 OPTION_COMPRESS_DEBUG
2717 };
2718
2719 static void
2720 gld${EMULATION_NAME}_add_options
2721 (int ns, char **shortopts, int nl, struct option **longopts,
2722 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2723 {
2724 EOF
2725 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2726 fragment <<EOF
2727 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2728 EOF
2729 else
2730 fragment <<EOF
2731 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2732 EOF
2733 fi
2734 fragment <<EOF
2735 static const struct option xtra_long[] = {
2736 EOF
2737 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2738 fragment <<EOF
2739 {"audit", required_argument, NULL, OPTION_AUDIT},
2740 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2741 EOF
2742 fi
2743 fragment <<EOF
2744 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2745 {"compress-debug-sections", required_argument, NULL, OPTION_COMPRESS_DEBUG},
2746 EOF
2747 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2748 fragment <<EOF
2749 {"depaudit", required_argument, NULL, 'P'},
2750 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2751 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2752 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2753 {"no-eh-frame-hdr", no_argument, NULL, OPTION_NO_EH_FRAME_HDR},
2754 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2755 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2756 EOF
2757 fi
2758 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2759 fragment <<EOF
2760 $PARSE_AND_LIST_LONGOPTS
2761 EOF
2762 fi
2763 fragment <<EOF
2764 {NULL, no_argument, NULL, 0}
2765 };
2766
2767 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2768 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2769 *longopts = (struct option *)
2770 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2771 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2772 }
2773
2774 #define DEFAULT_BUILD_ID_STYLE "sha1"
2775
2776 static bfd_boolean
2777 gld${EMULATION_NAME}_handle_option (int optc)
2778 {
2779 switch (optc)
2780 {
2781 default:
2782 return FALSE;
2783
2784 case OPTION_BUILD_ID:
2785 if (emit_note_gnu_build_id != NULL)
2786 {
2787 free ((char *) emit_note_gnu_build_id);
2788 emit_note_gnu_build_id = NULL;
2789 }
2790 if (optarg == NULL)
2791 optarg = DEFAULT_BUILD_ID_STYLE;
2792 if (strcmp (optarg, "none"))
2793 emit_note_gnu_build_id = xstrdup (optarg);
2794 break;
2795
2796 case OPTION_COMPRESS_DEBUG:
2797 if (strcasecmp (optarg, "none") == 0)
2798 link_info.compress_debug = COMPRESS_DEBUG_NONE;
2799 else if (strcasecmp (optarg, "zlib") == 0)
2800 link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
2801 else if (strcasecmp (optarg, "zlib-gnu") == 0)
2802 link_info.compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
2803 else if (strcasecmp (optarg, "zlib-gabi") == 0)
2804 link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
2805 else
2806 einfo (_("%F%P: invalid --compress-debug-sections option: \`%s'\n"),
2807 optarg);
2808 break;
2809 EOF
2810
2811 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2812 fragment <<EOF
2813 case OPTION_AUDIT:
2814 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2815 break;
2816
2817 case 'P':
2818 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2819 break;
2820
2821 case OPTION_DISABLE_NEW_DTAGS:
2822 link_info.new_dtags = FALSE;
2823 break;
2824
2825 case OPTION_ENABLE_NEW_DTAGS:
2826 link_info.new_dtags = TRUE;
2827 break;
2828
2829 case OPTION_EH_FRAME_HDR:
2830 link_info.eh_frame_hdr_type = DWARF2_EH_HDR;
2831 break;
2832
2833 case OPTION_NO_EH_FRAME_HDR:
2834 link_info.eh_frame_hdr_type = 0;
2835 break;
2836
2837 case OPTION_GROUP:
2838 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2839 /* Groups must be self-contained. */
2840 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2841 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2842 break;
2843
2844 case OPTION_EXCLUDE_LIBS:
2845 add_excluded_libs (optarg);
2846 break;
2847
2848 case OPTION_HASH_STYLE:
2849 link_info.emit_hash = FALSE;
2850 link_info.emit_gnu_hash = FALSE;
2851 if (strcmp (optarg, "sysv") == 0)
2852 link_info.emit_hash = TRUE;
2853 else if (strcmp (optarg, "gnu") == 0)
2854 link_info.emit_gnu_hash = TRUE;
2855 else if (strcmp (optarg, "both") == 0)
2856 {
2857 link_info.emit_hash = TRUE;
2858 link_info.emit_gnu_hash = TRUE;
2859 }
2860 else
2861 einfo (_("%F%P: invalid hash style \`%s'\n"), optarg);
2862 break;
2863
2864 EOF
2865 fi
2866 fragment <<EOF
2867 case 'z':
2868 if (strcmp (optarg, "defs") == 0)
2869 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2870 else if (strcmp (optarg, "undefs") == 0)
2871 link_info.unresolved_syms_in_objects = RM_IGNORE;
2872 else if (strcmp (optarg, "muldefs") == 0)
2873 link_info.allow_multiple_definition = TRUE;
2874 else if (CONST_STRNEQ (optarg, "max-page-size="))
2875 {
2876 char *end;
2877
2878 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2879 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2880 einfo (_("%F%P: invalid maximum page size \`%s'\n"),
2881 optarg + 14);
2882 }
2883 else if (CONST_STRNEQ (optarg, "common-page-size="))
2884 {
2885 char *end;
2886 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2887 if (*end
2888 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2889 einfo (_("%F%P: invalid common page size \`%s'\n"),
2890 optarg + 17);
2891 }
2892 else if (CONST_STRNEQ (optarg, "stack-size="))
2893 {
2894 char *end;
2895 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2896 if (*end || link_info.stacksize < 0)
2897 einfo (_("%F%P: invalid stack size \`%s'\n"), optarg + 11);
2898 if (!link_info.stacksize)
2899 /* Use -1 for explicit no-stack, because zero means
2900 'default'. */
2901 link_info.stacksize = -1;
2902 }
2903 else if (strcmp (optarg, "execstack") == 0)
2904 {
2905 link_info.execstack = TRUE;
2906 link_info.noexecstack = FALSE;
2907 }
2908 else if (strcmp (optarg, "noexecstack") == 0)
2909 {
2910 link_info.noexecstack = TRUE;
2911 link_info.execstack = FALSE;
2912 }
2913 else if (strcmp (optarg, "globalaudit") == 0)
2914 {
2915 link_info.flags_1 |= DF_1_GLOBAUDIT;
2916 }
2917 EOF
2918
2919 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2920 fragment <<EOF
2921 else if (strcmp (optarg, "global") == 0)
2922 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2923 else if (strcmp (optarg, "initfirst") == 0)
2924 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2925 else if (strcmp (optarg, "interpose") == 0)
2926 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2927 else if (strcmp (optarg, "loadfltr") == 0)
2928 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2929 else if (strcmp (optarg, "nodefaultlib") == 0)
2930 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2931 else if (strcmp (optarg, "nodelete") == 0)
2932 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2933 else if (strcmp (optarg, "nodlopen") == 0)
2934 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2935 else if (strcmp (optarg, "nodump") == 0)
2936 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2937 else if (strcmp (optarg, "now") == 0)
2938 {
2939 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2940 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2941 }
2942 else if (strcmp (optarg, "lazy") == 0)
2943 {
2944 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2945 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2946 }
2947 else if (strcmp (optarg, "origin") == 0)
2948 {
2949 link_info.flags |= (bfd_vma) DF_ORIGIN;
2950 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2951 }
2952 else if (strcmp (optarg, "combreloc") == 0)
2953 link_info.combreloc = TRUE;
2954 else if (strcmp (optarg, "nocombreloc") == 0)
2955 link_info.combreloc = FALSE;
2956 else if (strcmp (optarg, "nocopyreloc") == 0)
2957 link_info.nocopyreloc = TRUE;
2958 else if (strcmp (optarg, "relro") == 0)
2959 link_info.relro = TRUE;
2960 else if (strcmp (optarg, "norelro") == 0)
2961 link_info.relro = FALSE;
2962 else if (strcmp (optarg, "separate-code") == 0)
2963 link_info.separate_code = TRUE;
2964 else if (strcmp (optarg, "noseparate-code") == 0)
2965 link_info.separate_code = FALSE;
2966 else if (strcmp (optarg, "common") == 0)
2967 link_info.elf_stt_common = elf_stt_common;
2968 else if (strcmp (optarg, "nocommon") == 0)
2969 link_info.elf_stt_common = no_elf_stt_common;
2970 else if (strcmp (optarg, "text") == 0)
2971 link_info.error_textrel = TRUE;
2972 else if (strcmp (optarg, "notext") == 0)
2973 link_info.error_textrel = FALSE;
2974 else if (strcmp (optarg, "textoff") == 0)
2975 link_info.error_textrel = FALSE;
2976 EOF
2977 fi
2978
2979 if test -n "$PARSE_AND_LIST_ARGS_CASE_Z" ; then
2980 fragment <<EOF
2981 $PARSE_AND_LIST_ARGS_CASE_Z
2982 EOF
2983 fi
2984
2985 fragment <<EOF
2986 else
2987 einfo (_("%P: warning: -z %s ignored\n"), optarg);
2988 break;
2989 EOF
2990
2991 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2992 fragment <<EOF
2993 $PARSE_AND_LIST_ARGS_CASES
2994 EOF
2995 fi
2996
2997 fragment <<EOF
2998 }
2999
3000 return TRUE;
3001 }
3002
3003 EOF
3004
3005 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
3006 gld_list_options="gld${EMULATION_NAME}_list_options"
3007 if test -n "$PARSE_AND_LIST_OPTIONS"; then
3008 fragment <<EOF
3009
3010 static void
3011 gld${EMULATION_NAME}_list_options (FILE * file)
3012 {
3013 EOF
3014
3015 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
3016 fragment <<EOF
3017 $PARSE_AND_LIST_OPTIONS
3018 EOF
3019 fi
3020
3021 fragment <<EOF
3022 }
3023 EOF
3024 else
3025 gld_list_options="NULL"
3026 fi
3027
3028 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
3029 fragment <<EOF
3030 $PARSE_AND_LIST_EPILOGUE
3031 EOF
3032 fi
3033 fi
3034
3035 fragment <<EOF
3036
3037 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
3038 {
3039 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
3040 ${LDEMUL_SYSLIB-syslib_default},
3041 ${LDEMUL_HLL-hll_default},
3042 ${LDEMUL_AFTER_PARSE-gld${EMULATION_NAME}_after_parse},
3043 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
3044 ${LDEMUL_AFTER_CHECK_RELOCS-after_check_relocs_default},
3045 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
3046 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
3047 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
3048 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
3049 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
3050 "${EMULATION_NAME}",
3051 "${OUTPUT_FORMAT}",
3052 ${LDEMUL_FINISH-finish_default},
3053 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
3054 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
3055 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
3056 ${LDEMUL_SET_SYMBOLS-NULL},
3057 ${LDEMUL_PARSE_ARGS-NULL},
3058 gld${EMULATION_NAME}_add_options,
3059 gld${EMULATION_NAME}_handle_option,
3060 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
3061 ${LDEMUL_LIST_OPTIONS-${gld_list_options}},
3062 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
3063 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
3064 ${LDEMUL_NEW_VERS_PATTERN-NULL},
3065 ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL}
3066 };
3067 EOF
This page took 0.11384 seconds and 5 git commands to generate.