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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 ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
17 Free Software Foundation, Inc.
18 Written by Steve Chamberlain <sac@cygnus.com>
19 ELF support by Ian Lance Taylor <ian@cygnus.com>
20
21 This file is part of the GNU Binutils.
22
23 This program is free software; you can redistribute it and/or modify
24 it under the terms of the GNU General Public License as published by
25 the Free Software Foundation; either version 3 of the License, or
26 (at your option) any later version.
27
28 This program is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
32
33 You should have received a copy of the GNU General Public License
34 along with this program; if not, write to the Free Software
35 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
36 MA 02110-1301, USA. */
37
38 #define TARGET_IS_${EMULATION_NAME}
39
40 #include "sysdep.h"
41 #include "bfd.h"
42 #include "libiberty.h"
43 #include "filenames.h"
44 #include "safe-ctype.h"
45 #include "getopt.h"
46 #include "md5.h"
47 #include "sha1.h"
48 #include <fcntl.h>
49
50 #include "bfdlink.h"
51
52 #include "ld.h"
53 #include "ldmain.h"
54 #include "ldmisc.h"
55 #include "ldexp.h"
56 #include "ldlang.h"
57 #include "ldfile.h"
58 #include "ldemul.h"
59 #include <ldgram.h>
60 #include "elf/common.h"
61 #include "elf-bfd.h"
62 #include "filenames.h"
63
64 /* Declare functions used by various EXTRA_EM_FILEs. */
65 static void gld${EMULATION_NAME}_before_parse (void);
66 static void gld${EMULATION_NAME}_after_parse (void);
67 static void gld${EMULATION_NAME}_after_open (void);
68 static void gld${EMULATION_NAME}_before_allocation (void);
69 static void gld${EMULATION_NAME}_after_allocation (void);
70 static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan
71 (asection *, const char *, int);
72 EOF
73
74 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
75 fragment <<EOF
76
77 /* TRUE if link_info.new_dtags is set. */
78 static bfd_boolean new_dtags_set;
79
80 EOF
81 fi
82
83 if [ "x${USE_LIBPATH}" = xyes ] ; then
84 case ${target} in
85 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
86 fragment <<EOF
87 #ifdef HAVE_GLOB
88 #include <glob.h>
89 #endif
90 EOF
91 ;;
92 esac
93 fi
94
95 # Import any needed special functions and/or overrides.
96 #
97 source_em ${srcdir}/emultempl/elf-generic.em
98 if test -n "$EXTRA_EM_FILE" ; then
99 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
100 fi
101
102 # Functions in this file can be overridden by setting the LDEMUL_* shell
103 # variables. If the name of the overriding function is the same as is
104 # defined in this file, then don't output this file's version.
105 # If a different overriding name is given then output the standard function
106 # as presumably it is called from the overriding function.
107 #
108 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
109 fragment <<EOF
110
111 static void
112 gld${EMULATION_NAME}_before_parse (void)
113 {
114 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
115 input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
116 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
117 config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
118 }
119
120 EOF
121 fi
122
123 fragment <<EOF
124 static void
125 gld${EMULATION_NAME}_after_parse (void)
126 {
127 EOF
128
129 if test x"$LDEMUL_AFTER_PARSE" != xgld"$EMULATION_NAME"_after_parse; then
130 # Enable the "new" dtags by default only for Linux target emulation if
131 # -rpath isn't used.
132 case ${target} in
133 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu* | *-*-nacl*)
134 case " ${EMULATION_LIBPATH} " in
135 *" ${EMULATION_NAME} "*)
136 fragment <<EOF
137 if (!new_dtags_set && command_line.rpath == NULL)
138 link_info.new_dtags = TRUE;
139 EOF
140 ;;
141 esac
142 ;;
143 esac
144
145 fragment <<EOF
146 after_parse_default ();
147 }
148
149 EOF
150 fi
151
152 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
153 fragment <<EOF
154 /* Handle the generation of DT_NEEDED tags. */
155
156 static bfd_boolean
157 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
158 {
159 int link_class = 0;
160
161 /* Tell the ELF linker that we don't want the output file to have a
162 DT_NEEDED entry for this file, unless it is used to resolve
163 references in a regular object. */
164 if (entry->flags.add_DT_NEEDED_for_regular)
165 link_class = DYN_AS_NEEDED;
166
167 /* Tell the ELF linker that we don't want the output file to have a
168 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
169 this file at all. */
170 if (!entry->flags.add_DT_NEEDED_for_dynamic)
171 link_class |= DYN_NO_ADD_NEEDED;
172
173 if (entry->flags.just_syms
174 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
175 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
176 entry->the_bfd);
177
178 if (link_class == 0
179 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
180 return FALSE;
181
182 bfd_elf_set_dyn_lib_class (entry->the_bfd,
183 (enum dynamic_lib_link_class) link_class);
184
185 /* Continue on with normal load_symbols processing. */
186 return FALSE;
187 }
188 EOF
189 fi
190
191 fragment <<EOF
192
193 /* These variables are required to pass information back and forth
194 between after_open and check_needed and stat_needed and vercheck. */
195
196 static struct bfd_link_needed_list *global_needed;
197 static struct stat global_stat;
198 static lang_input_statement_type *global_found;
199 static struct bfd_link_needed_list *global_vercheck_needed;
200 static bfd_boolean global_vercheck_failed;
201
202 /* These variables are used to implement target options */
203
204 static char *audit; /* colon (typically) separated list of libs */
205 static char *depaudit; /* colon (typically) separated list of libs */
206
207 /* On Linux, it's possible to have different versions of the same
208 shared library linked against different versions of libc. The
209 dynamic linker somehow tags which libc version to use in
210 /etc/ld.so.cache, and, based on the libc that it sees in the
211 executable, chooses which version of the shared library to use.
212
213 We try to do a similar check here by checking whether this shared
214 library needs any other shared libraries which may conflict with
215 libraries we have already included in the link. If it does, we
216 skip it, and try to find another shared library farther on down the
217 link path.
218
219 This is called via lang_for_each_input_file.
220 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
221 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
222 a conflicting version. */
223
224 static void
225 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
226 {
227 const char *soname;
228 struct bfd_link_needed_list *l;
229
230 if (global_vercheck_failed)
231 return;
232 if (s->the_bfd == NULL
233 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
234 return;
235
236 soname = bfd_elf_get_dt_soname (s->the_bfd);
237 if (soname == NULL)
238 soname = lbasename (bfd_get_filename (s->the_bfd));
239
240 for (l = global_vercheck_needed; l != NULL; l = l->next)
241 {
242 const char *suffix;
243
244 if (filename_cmp (soname, l->name) == 0)
245 {
246 /* Probably can't happen, but it's an easy check. */
247 continue;
248 }
249
250 if (strchr (l->name, '/') != NULL)
251 continue;
252
253 suffix = strstr (l->name, ".so.");
254 if (suffix == NULL)
255 continue;
256
257 suffix += sizeof ".so." - 1;
258
259 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
260 {
261 /* Here we know that S is a dynamic object FOO.SO.VER1, and
262 the object we are considering needs a dynamic object
263 FOO.SO.VER2, and VER1 and VER2 are different. This
264 appears to be a version mismatch, so we tell the caller
265 to try a different version of this library. */
266 global_vercheck_failed = TRUE;
267 return;
268 }
269 }
270 }
271
272
273 /* See if an input file matches a DT_NEEDED entry by running stat on
274 the file. */
275
276 static void
277 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
278 {
279 struct stat st;
280 const char *suffix;
281 const char *soname;
282
283 if (global_found != NULL)
284 return;
285 if (s->the_bfd == NULL)
286 return;
287
288 /* If this input file was an as-needed entry, and wasn't found to be
289 needed at the stage it was linked, then don't say we have loaded it. */
290 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
291 return;
292
293 if (bfd_stat (s->the_bfd, &st) != 0)
294 {
295 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
296 return;
297 }
298
299 /* Some operating systems, e.g. Windows, do not provide a meaningful
300 st_ino; they always set it to zero. (Windows does provide a
301 meaningful st_dev.) Do not indicate a duplicate library in that
302 case. While there is no guarantee that a system that provides
303 meaningful inode numbers will never set st_ino to zero, this is
304 merely an optimization, so we do not need to worry about false
305 negatives. */
306 if (st.st_dev == global_stat.st_dev
307 && st.st_ino == global_stat.st_ino
308 && st.st_ino != 0)
309 {
310 global_found = s;
311 return;
312 }
313
314 /* We issue a warning if it looks like we are including two
315 different versions of the same shared library. For example,
316 there may be a problem if -lc picks up libc.so.6 but some other
317 shared library has a DT_NEEDED entry of libc.so.5. This is a
318 heuristic test, and it will only work if the name looks like
319 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
320 If we really want to issue warnings about mixing version numbers
321 of shared libraries, we need to find a better way. */
322
323 if (strchr (global_needed->name, '/') != NULL)
324 return;
325 suffix = strstr (global_needed->name, ".so.");
326 if (suffix == NULL)
327 return;
328 suffix += sizeof ".so." - 1;
329
330 soname = bfd_elf_get_dt_soname (s->the_bfd);
331 if (soname == NULL)
332 soname = lbasename (s->filename);
333
334 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
335 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
336 global_needed->name, global_needed->by, soname);
337 }
338
339 struct dt_needed
340 {
341 bfd *by;
342 const char *name;
343 };
344
345 /* This function is called for each possible name for a dynamic object
346 named by a DT_NEEDED entry. The FORCE parameter indicates whether
347 to skip the check for a conflicting version. */
348
349 static bfd_boolean
350 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
351 int force)
352 {
353 bfd *abfd;
354 const char *name = needed->name;
355 const char *soname;
356 int link_class;
357
358 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
359 if (abfd == NULL)
360 return FALSE;
361
362 /* Linker needs to decompress sections. */
363 abfd->flags |= BFD_DECOMPRESS;
364
365 if (! bfd_check_format (abfd, bfd_object))
366 {
367 bfd_close (abfd);
368 return FALSE;
369 }
370 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
371 {
372 bfd_close (abfd);
373 return FALSE;
374 }
375
376 /* For DT_NEEDED, they have to match. */
377 if (abfd->xvec != link_info.output_bfd->xvec)
378 {
379 bfd_close (abfd);
380 return FALSE;
381 }
382
383 /* Check whether this object would include any conflicting library
384 versions. If FORCE is set, then we skip this check; we use this
385 the second time around, if we couldn't find any compatible
386 instance of the shared library. */
387
388 if (! force)
389 {
390 struct bfd_link_needed_list *needs;
391
392 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
393 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
394
395 if (needs != NULL)
396 {
397 global_vercheck_needed = needs;
398 global_vercheck_failed = FALSE;
399 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
400 if (global_vercheck_failed)
401 {
402 bfd_close (abfd);
403 /* Return FALSE to force the caller to move on to try
404 another file on the search path. */
405 return FALSE;
406 }
407
408 /* But wait! It gets much worse. On Linux, if a shared
409 library does not use libc at all, we are supposed to skip
410 it the first time around in case we encounter a shared
411 library later on with the same name which does use the
412 version of libc that we want. This is much too horrible
413 to use on any system other than Linux. */
414
415 EOF
416 case ${target} in
417 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
418 fragment <<EOF
419 {
420 struct bfd_link_needed_list *l;
421
422 for (l = needs; l != NULL; l = l->next)
423 if (CONST_STRNEQ (l->name, "libc.so"))
424 break;
425 if (l == NULL)
426 {
427 bfd_close (abfd);
428 return FALSE;
429 }
430 }
431
432 EOF
433 ;;
434 esac
435 fragment <<EOF
436 }
437 }
438
439 /* We've found a dynamic object matching the DT_NEEDED entry. */
440
441 /* We have already checked that there is no other input file of the
442 same name. We must now check again that we are not including the
443 same file twice. We need to do this because on many systems
444 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
445 reference libc.so.1. If we have already included libc.so, we
446 don't want to include libc.so.1 if they are the same file, and we
447 can only check that using stat. */
448
449 if (bfd_stat (abfd, &global_stat) != 0)
450 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
451
452 /* First strip off everything before the last '/'. */
453 soname = lbasename (abfd->filename);
454
455 if (verbose)
456 info_msg (_("found %s at %s\n"), soname, name);
457
458 global_found = NULL;
459 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
460 if (global_found != NULL)
461 {
462 /* Return TRUE to indicate that we found the file, even though
463 we aren't going to do anything with it. */
464 return TRUE;
465 }
466
467 /* Specify the soname to use. */
468 bfd_elf_set_dt_needed_name (abfd, soname);
469
470 /* Tell the ELF linker that we don't want the output file to have a
471 DT_NEEDED entry for this file, unless it is used to resolve
472 references in a regular object. */
473 link_class = DYN_DT_NEEDED;
474
475 /* Tell the ELF linker that we don't want the output file to have a
476 DT_NEEDED entry for this file at all if the entry is from a file
477 with DYN_NO_ADD_NEEDED. */
478 if (needed->by != NULL
479 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
480 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
481
482 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
483
484 /* Add this file into the symbol table. */
485 if (! bfd_link_add_symbols (abfd, &link_info))
486 einfo ("%F%B: could not read symbols: %E\n", abfd);
487
488 return TRUE;
489 }
490
491
492 /* Search for a needed file in a path. */
493
494 static bfd_boolean
495 gld${EMULATION_NAME}_search_needed (const char *path,
496 struct dt_needed *n, int force)
497 {
498 const char *s;
499 const char *name = n->name;
500 size_t len;
501 struct dt_needed needed;
502
503 if (name[0] == '/')
504 return gld${EMULATION_NAME}_try_needed (n, force);
505
506 if (path == NULL || *path == '\0')
507 return FALSE;
508
509 needed.by = n->by;
510 needed.name = n->name;
511
512 len = strlen (name);
513 while (1)
514 {
515 char *filename, *sset;
516
517 s = strchr (path, config.rpath_separator);
518 if (s == NULL)
519 s = path + strlen (path);
520
521 #if HAVE_DOS_BASED_FILE_SYSTEM
522 /* Assume a match on the second char is part of drive specifier. */
523 else if (config.rpath_separator == ':'
524 && s == path + 1
525 && ISALPHA (*path))
526 {
527 s = strchr (s + 1, config.rpath_separator);
528 if (s == NULL)
529 s = path + strlen (path);
530 }
531 #endif
532 filename = (char *) xmalloc (s - path + len + 2);
533 if (s == path)
534 sset = filename;
535 else
536 {
537 memcpy (filename, path, s - path);
538 filename[s - path] = '/';
539 sset = filename + (s - path) + 1;
540 }
541 strcpy (sset, name);
542
543 needed.name = filename;
544 if (gld${EMULATION_NAME}_try_needed (&needed, force))
545 return TRUE;
546
547 free (filename);
548
549 if (*s == '\0')
550 break;
551 path = s + 1;
552 }
553
554 return FALSE;
555 }
556
557 EOF
558 if [ "x${USE_LIBPATH}" = xyes ] ; then
559 fragment <<EOF
560
561 /* Add the sysroot to every entry in a path separated by
562 config.rpath_separator. */
563
564 static char *
565 gld${EMULATION_NAME}_add_sysroot (const char *path)
566 {
567 int len, colons, i;
568 char *ret, *p;
569
570 len = strlen (path);
571 colons = 0;
572 i = 0;
573 while (path[i])
574 if (path[i++] == config.rpath_separator)
575 colons++;
576
577 if (path[i])
578 colons++;
579
580 len = len + (colons + 1) * strlen (ld_sysroot);
581 ret = xmalloc (len + 1);
582 strcpy (ret, ld_sysroot);
583 p = ret + strlen (ret);
584 i = 0;
585 while (path[i])
586 if (path[i] == config.rpath_separator)
587 {
588 *p++ = path[i++];
589 strcpy (p, ld_sysroot);
590 p = p + strlen (p);
591 }
592 else
593 *p++ = path[i++];
594
595 *p = 0;
596 return ret;
597 }
598
599 EOF
600 case ${target} in
601 *-*-freebsd* | *-*-dragonfly*)
602 fragment <<EOF
603 /* Read the system search path the FreeBSD way rather than the Linux way. */
604 #ifdef HAVE_ELF_HINTS_H
605 #include <elf-hints.h>
606 #else
607 #include "elf-hints-local.h"
608 #endif
609
610 static bfd_boolean
611 gld${EMULATION_NAME}_check_ld_elf_hints (const struct bfd_link_needed_list *l,
612 int force)
613 {
614 static bfd_boolean initialized;
615 static char *ld_elf_hints;
616 struct dt_needed needed;
617
618 if (!initialized)
619 {
620 FILE *f;
621 char *tmppath;
622
623 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
624 f = fopen (tmppath, FOPEN_RB);
625 free (tmppath);
626 if (f != NULL)
627 {
628 struct elfhints_hdr hdr;
629
630 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
631 && hdr.magic == ELFHINTS_MAGIC
632 && hdr.version == 1)
633 {
634 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
635 {
636 char *b;
637
638 b = xmalloc (hdr.dirlistlen + 1);
639 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
640 hdr.dirlistlen + 1)
641 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
642
643 free (b);
644 }
645 }
646 fclose (f);
647 }
648
649 initialized = TRUE;
650 }
651
652 if (ld_elf_hints == NULL)
653 return FALSE;
654
655 needed.by = l->by;
656 needed.name = l->name;
657 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, &needed, force);
658 }
659 EOF
660 # FreeBSD
661 ;;
662
663 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
664 fragment <<EOF
665 /* For a native linker, check the file /etc/ld.so.conf for directories
666 in which we may find shared libraries. /etc/ld.so.conf is really
667 only meaningful on Linux. */
668
669 struct gld${EMULATION_NAME}_ld_so_conf
670 {
671 char *path;
672 size_t len, alloc;
673 };
674
675 static bfd_boolean
676 gld${EMULATION_NAME}_parse_ld_so_conf
677 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
678
679 static void
680 gld${EMULATION_NAME}_parse_ld_so_conf_include
681 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
682 const char *pattern)
683 {
684 char *newp = NULL;
685 #ifdef HAVE_GLOB
686 glob_t gl;
687 #endif
688
689 if (pattern[0] != '/')
690 {
691 char *p = strrchr (filename, '/');
692 size_t patlen = strlen (pattern) + 1;
693
694 newp = xmalloc (p - filename + 1 + patlen);
695 memcpy (newp, filename, p - filename + 1);
696 memcpy (newp + (p - filename + 1), pattern, patlen);
697 pattern = newp;
698 }
699
700 #ifdef HAVE_GLOB
701 if (glob (pattern, 0, NULL, &gl) == 0)
702 {
703 size_t i;
704
705 for (i = 0; i < gl.gl_pathc; ++i)
706 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
707 globfree (&gl);
708 }
709 #else
710 /* If we do not have glob, treat the pattern as a literal filename. */
711 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
712 #endif
713
714 if (newp)
715 free (newp);
716 }
717
718 static bfd_boolean
719 gld${EMULATION_NAME}_parse_ld_so_conf
720 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
721 {
722 FILE *f = fopen (filename, FOPEN_RT);
723 char *line;
724 size_t linelen;
725
726 if (f == NULL)
727 return FALSE;
728
729 linelen = 256;
730 line = xmalloc (linelen);
731 do
732 {
733 char *p = line, *q;
734
735 /* Normally this would use getline(3), but we need to be portable. */
736 while ((q = fgets (p, linelen - (p - line), f)) != NULL
737 && strlen (q) == linelen - (p - line) - 1
738 && line[linelen - 2] != '\n')
739 {
740 line = xrealloc (line, 2 * linelen);
741 p = line + linelen - 1;
742 linelen += linelen;
743 }
744
745 if (q == NULL && p == line)
746 break;
747
748 p = strchr (line, '\n');
749 if (p)
750 *p = '\0';
751
752 /* Because the file format does not know any form of quoting we
753 can search forward for the next '#' character and if found
754 make it terminating the line. */
755 p = strchr (line, '#');
756 if (p)
757 *p = '\0';
758
759 /* Remove leading whitespace. NUL is no whitespace character. */
760 p = line;
761 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
762 ++p;
763
764 /* If the line is blank it is ignored. */
765 if (p[0] == '\0')
766 continue;
767
768 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
769 {
770 char *dir, c;
771 p += 8;
772 do
773 {
774 while (*p == ' ' || *p == '\t')
775 ++p;
776
777 if (*p == '\0')
778 break;
779
780 dir = p;
781
782 while (*p != ' ' && *p != '\t' && *p)
783 ++p;
784
785 c = *p;
786 *p++ = '\0';
787 if (dir[0] != '\0')
788 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
789 dir);
790 }
791 while (c != '\0');
792 }
793 else
794 {
795 char *dir = p;
796 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
797 && *p != '\r' && *p != '\v')
798 ++p;
799
800 while (p != dir && p[-1] == '/')
801 --p;
802 if (info->path == NULL)
803 {
804 info->alloc = p - dir + 1 + 256;
805 info->path = xmalloc (info->alloc);
806 info->len = 0;
807 }
808 else
809 {
810 if (info->len + 1 + (p - dir) >= info->alloc)
811 {
812 info->alloc += p - dir + 256;
813 info->path = xrealloc (info->path, info->alloc);
814 }
815 info->path[info->len++] = config.rpath_separator;
816 }
817 memcpy (info->path + info->len, dir, p - dir);
818 info->len += p - dir;
819 info->path[info->len] = '\0';
820 }
821 }
822 while (! feof (f));
823 free (line);
824 fclose (f);
825 return TRUE;
826 }
827
828 static bfd_boolean
829 gld${EMULATION_NAME}_check_ld_so_conf (const struct bfd_link_needed_list *l,
830 int force)
831 {
832 static bfd_boolean initialized;
833 static char *ld_so_conf;
834 struct dt_needed needed;
835
836 if (! initialized)
837 {
838 char *tmppath;
839 struct gld${EMULATION_NAME}_ld_so_conf info;
840
841 info.path = NULL;
842 info.len = info.alloc = 0;
843 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
844 (const char *) NULL);
845 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
846 {
847 free (tmppath);
848 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
849 (const char *) NULL);
850 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
851 }
852 free (tmppath);
853
854 if (info.path)
855 {
856 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
857 free (info.path);
858 ld_so_conf = d;
859 }
860 initialized = TRUE;
861 }
862
863 if (ld_so_conf == NULL)
864 return FALSE;
865
866
867 needed.by = l->by;
868 needed.name = l->name;
869 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
870 }
871
872 EOF
873 # Linux
874 ;;
875 esac
876 fi
877 fragment <<EOF
878
879 /* See if an input file matches a DT_NEEDED entry by name. */
880
881 static void
882 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
883 {
884 const char *soname;
885
886 /* Stop looking if we've found a loaded lib. */
887 if (global_found != NULL
888 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
889 & DYN_AS_NEEDED) == 0)
890 return;
891
892 if (s->filename == NULL || s->the_bfd == NULL)
893 return;
894
895 /* Don't look for a second non-loaded as-needed lib. */
896 if (global_found != NULL
897 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
898 return;
899
900 if (filename_cmp (s->filename, global_needed->name) == 0)
901 {
902 global_found = s;
903 return;
904 }
905
906 if (s->flags.search_dirs)
907 {
908 const char *f = strrchr (s->filename, '/');
909 if (f != NULL
910 && filename_cmp (f + 1, global_needed->name) == 0)
911 {
912 global_found = s;
913 return;
914 }
915 }
916
917 soname = bfd_elf_get_dt_soname (s->the_bfd);
918 if (soname != NULL
919 && filename_cmp (soname, global_needed->name) == 0)
920 {
921 global_found = s;
922 return;
923 }
924 }
925
926 EOF
927
928 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
929 fragment <<EOF
930
931 static bfd_size_type
932 gld${EMULATION_NAME}_id_note_section_size (bfd *abfd,
933 struct bfd_link_info *linfo)
934 {
935 const char *style = linfo->emit_note_gnu_build_id;
936 bfd_size_type size;
937
938 abfd = abfd;
939
940 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
941 size = (size + 3) & -(bfd_size_type) 4;
942
943 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
944 size += 128 / 8;
945 else if (!strcmp (style, "sha1"))
946 size += 160 / 8;
947 else if (!strncmp (style, "0x", 2))
948 {
949 /* ID is in string form (hex). Convert to bits. */
950 const char *id = style + 2;
951 do
952 {
953 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
954 {
955 ++size;
956 id += 2;
957 }
958 else if (*id == '-' || *id == ':')
959 ++id;
960 else
961 {
962 size = 0;
963 break;
964 }
965 } while (*id != '\0');
966 }
967 else
968 size = 0;
969
970 return size;
971 }
972
973 static unsigned char
974 read_hex (const char xdigit)
975 {
976 if (ISDIGIT (xdigit))
977 return xdigit - '0';
978 if (ISUPPER (xdigit))
979 return xdigit - 'A' + 0xa;
980 if (ISLOWER (xdigit))
981 return xdigit - 'a' + 0xa;
982 abort ();
983 return 0;
984 }
985
986 struct build_id_info
987 {
988 const char *style;
989 asection *sec;
990 };
991
992 static bfd_boolean
993 gld${EMULATION_NAME}_write_build_id_section (bfd *abfd)
994 {
995 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
996 struct build_id_info *info = (struct build_id_info *)
997 elf_tdata (abfd)->after_write_object_contents_info;
998 asection *asec;
999 Elf_Internal_Shdr *i_shdr;
1000 unsigned char *contents, *id_bits;
1001 bfd_size_type size;
1002 Elf_External_Note *e_note;
1003
1004 asec = info->sec;
1005 if (bfd_is_abs_section (asec->output_section))
1006 {
1007 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
1008 " --build-id ignored.\n"));
1009 return TRUE;
1010 }
1011 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
1012
1013 if (i_shdr->contents == NULL)
1014 {
1015 if (asec->contents == NULL)
1016 asec->contents = (unsigned char *) xmalloc (asec->size);
1017 contents = asec->contents;
1018 }
1019 else
1020 contents = i_shdr->contents + asec->output_offset;
1021
1022 e_note = (Elf_External_Note *) contents;
1023 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
1024 size = (size + 3) & -(bfd_size_type) 4;
1025 id_bits = contents + size;
1026 size = asec->size - size;
1027
1028 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
1029 bfd_h_put_32 (abfd, size, &e_note->descsz);
1030 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
1031 memcpy (e_note->name, "GNU", sizeof "GNU");
1032
1033 if (!strcmp (info->style, "md5"))
1034 {
1035 struct md5_ctx ctx;
1036 md5_init_ctx (&ctx);
1037 if (bed->s->checksum_contents (abfd,
1038 (void (*) (const void *, size_t, void *))
1039 &md5_process_bytes,
1040 &ctx))
1041 md5_finish_ctx (&ctx, id_bits);
1042 else
1043 return FALSE;
1044 }
1045 else if (!strcmp (info->style, "sha1"))
1046 {
1047 struct sha1_ctx ctx;
1048 sha1_init_ctx (&ctx);
1049 if (bed->s->checksum_contents (abfd,
1050 (void (*) (const void *, size_t, void *))
1051 &sha1_process_bytes,
1052 &ctx))
1053 sha1_finish_ctx (&ctx, id_bits);
1054 else
1055 return FALSE;
1056 }
1057 else if (!strcmp (info->style, "uuid"))
1058 {
1059 int n;
1060 int fd = open ("/dev/urandom", O_RDONLY);
1061 if (fd < 0)
1062 return FALSE;
1063 n = read (fd, id_bits, size);
1064 close (fd);
1065 if (n < (int) size)
1066 return FALSE;
1067 }
1068 else if (!strncmp (info->style, "0x", 2))
1069 {
1070 /* ID is in string form (hex). Convert to bits. */
1071 const char *id = info->style + 2;
1072 size_t n = 0;
1073 do
1074 {
1075 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1076 {
1077 id_bits[n] = read_hex (*id++) << 4;
1078 id_bits[n++] |= read_hex (*id++);
1079 }
1080 else if (*id == '-' || *id == ':')
1081 ++id;
1082 else
1083 abort (); /* Should have been validated earlier. */
1084 } while (*id != '\0');
1085 }
1086 else
1087 abort (); /* Should have been validated earlier. */
1088
1089 size = asec->size;
1090 return (bfd_seek (abfd,
1091 i_shdr->sh_offset + asec->output_offset, SEEK_SET) == 0
1092 && bfd_bwrite (contents, size, abfd) == size);
1093 }
1094
1095
1096 /* This is called after all the input files have been opened. */
1097
1098 static void
1099 gld${EMULATION_NAME}_after_open (void)
1100 {
1101 struct bfd_link_needed_list *needed, *l;
1102 struct elf_link_hash_table *htab;
1103
1104 after_open_default ();
1105
1106 htab = elf_hash_table (&link_info);
1107 if (!is_elf_hash_table (htab))
1108 return;
1109
1110 if (link_info.emit_note_gnu_build_id)
1111 {
1112 bfd *abfd;
1113 asection *s;
1114 bfd_size_type size;
1115
1116 /* Find an ELF input. */
1117 for (abfd = link_info.input_bfds;
1118 abfd != (bfd *) NULL; abfd = abfd->link_next)
1119 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1120 break;
1121
1122 if (abfd == NULL)
1123 {
1124 /* PR 10555: If there are no input files do not
1125 try to create a .note.gnu-build-id section. */
1126 free (link_info.emit_note_gnu_build_id);
1127 link_info.emit_note_gnu_build_id = NULL;
1128 }
1129 else
1130 {
1131 size = gld${EMULATION_NAME}_id_note_section_size (abfd, &link_info);
1132 if (size == 0)
1133 {
1134 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1135 free (link_info.emit_note_gnu_build_id);
1136 link_info.emit_note_gnu_build_id = NULL;
1137 }
1138 else
1139 {
1140 s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id",
1141 SEC_ALLOC | SEC_LOAD
1142 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1143 | SEC_READONLY | SEC_DATA);
1144 if (s != NULL && bfd_set_section_alignment (abfd, s, 2))
1145 {
1146 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1147 struct build_id_info *b =
1148 (struct build_id_info *) xmalloc (sizeof *b);
1149
1150 b->style = link_info.emit_note_gnu_build_id;
1151 b->sec = s;
1152 elf_section_type (s) = SHT_NOTE;
1153 s->size = size;
1154 t->after_write_object_contents
1155 = &gld${EMULATION_NAME}_write_build_id_section;
1156 t->after_write_object_contents_info = b;
1157 }
1158 else
1159 {
1160 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1161 " --build-id ignored.\n");
1162 free (link_info.emit_note_gnu_build_id);
1163 link_info.emit_note_gnu_build_id = NULL;
1164 }
1165 }
1166 }
1167 }
1168
1169 if (link_info.relocatable)
1170 return;
1171
1172 if (link_info.eh_frame_hdr
1173 && !link_info.traditional_format)
1174 {
1175 bfd *abfd, *elfbfd = NULL;
1176 bfd_boolean warn_eh_frame = FALSE;
1177 asection *s;
1178
1179 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1180 {
1181 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1182 elfbfd = abfd;
1183 if (!warn_eh_frame)
1184 {
1185 s = bfd_get_section_by_name (abfd, ".eh_frame");
1186 while (s != NULL
1187 && (s->size <= 8
1188 || bfd_is_abs_section (s->output_section)))
1189 s = bfd_get_next_section_by_name (s);
1190 warn_eh_frame = s != NULL;
1191 }
1192 if (elfbfd && warn_eh_frame)
1193 break;
1194 }
1195 if (elfbfd)
1196 {
1197 const struct elf_backend_data *bed;
1198
1199 bed = get_elf_backend_data (elfbfd);
1200 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1201 bed->dynamic_sec_flags
1202 | SEC_READONLY);
1203 if (s != NULL
1204 && bfd_set_section_alignment (elfbfd, s, 2))
1205 {
1206 htab->eh_info.hdr_sec = s;
1207 warn_eh_frame = FALSE;
1208 }
1209 }
1210 if (warn_eh_frame)
1211 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1212 " --eh-frame-hdr ignored.\n");
1213 }
1214
1215 /* Get the list of files which appear in DT_NEEDED entries in
1216 dynamic objects included in the link (often there will be none).
1217 For each such file, we want to track down the corresponding
1218 library, and include the symbol table in the link. This is what
1219 the runtime dynamic linker will do. Tracking the files down here
1220 permits one dynamic object to include another without requiring
1221 special action by the person doing the link. Note that the
1222 needed list can actually grow while we are stepping through this
1223 loop. */
1224 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1225 for (l = needed; l != NULL; l = l->next)
1226 {
1227 struct bfd_link_needed_list *ll;
1228 struct dt_needed n, nn;
1229 int force;
1230
1231 /* If the lib that needs this one was --as-needed and wasn't
1232 found to be needed, then this lib isn't needed either. Skip
1233 the lib when creating a shared object unless we are copying
1234 DT_NEEDED entres. */
1235 if (l->by != NULL
1236 && ((bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0
1237 || (!link_info.executable
1238 && bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0))
1239 continue;
1240
1241 /* If we've already seen this file, skip it. */
1242 for (ll = needed; ll != l; ll = ll->next)
1243 if ((ll->by == NULL
1244 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1245 && strcmp (ll->name, l->name) == 0)
1246 break;
1247 if (ll != l)
1248 continue;
1249
1250 /* See if this file was included in the link explicitly. */
1251 global_needed = l;
1252 global_found = NULL;
1253 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1254 if (global_found != NULL
1255 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1256 & DYN_AS_NEEDED) == 0)
1257 continue;
1258
1259 n.by = l->by;
1260 n.name = l->name;
1261 nn.by = l->by;
1262 if (verbose)
1263 info_msg (_("%s needed by %B\n"), l->name, l->by);
1264
1265 /* As-needed libs specified on the command line (or linker script)
1266 take priority over libs found in search dirs. */
1267 if (global_found != NULL)
1268 {
1269 nn.name = global_found->filename;
1270 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1271 continue;
1272 }
1273
1274 /* We need to find this file and include the symbol table. We
1275 want to search for the file in the same way that the dynamic
1276 linker will search. That means that we want to use
1277 rpath_link, rpath, then the environment variable
1278 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1279 entries (native only), then the linker script LIB_SEARCH_DIRS.
1280 We do not search using the -L arguments.
1281
1282 We search twice. The first time, we skip objects which may
1283 introduce version mismatches. The second time, we force
1284 their use. See gld${EMULATION_NAME}_vercheck comment. */
1285 for (force = 0; force < 2; force++)
1286 {
1287 size_t len;
1288 search_dirs_type *search;
1289 EOF
1290 if [ "x${NATIVE}" = xyes ] ; then
1291 fragment <<EOF
1292 const char *lib_path;
1293 EOF
1294 fi
1295 if [ "x${USE_LIBPATH}" = xyes ] ; then
1296 fragment <<EOF
1297 struct bfd_link_needed_list *rp;
1298 int found;
1299 EOF
1300 fi
1301 fragment <<EOF
1302
1303 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1304 &n, force))
1305 break;
1306 EOF
1307 if [ "x${USE_LIBPATH}" = xyes ] ; then
1308 fragment <<EOF
1309 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1310 &n, force))
1311 break;
1312 EOF
1313 fi
1314 if [ "x${NATIVE}" = xyes ] ; then
1315 fragment <<EOF
1316 if (command_line.rpath_link == NULL
1317 && command_line.rpath == NULL)
1318 {
1319 lib_path = (const char *) getenv ("LD_RUN_PATH");
1320 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1321 force))
1322 break;
1323 }
1324 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1325 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1326 break;
1327 EOF
1328 fi
1329 if [ "x${USE_LIBPATH}" = xyes ] ; then
1330 fragment <<EOF
1331 found = 0;
1332 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1333 for (; !found && rp != NULL; rp = rp->next)
1334 {
1335 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1336 found = (rp->by == l->by
1337 && gld${EMULATION_NAME}_search_needed (tmpname,
1338 &n,
1339 force));
1340 free (tmpname);
1341 }
1342 if (found)
1343 break;
1344
1345 EOF
1346 fi
1347 if [ "x${USE_LIBPATH}" = xyes ] ; then
1348 case ${target} in
1349 *-*-freebsd* | *-*-dragonfly*)
1350 fragment <<EOF
1351 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1352 break;
1353 EOF
1354 # FreeBSD
1355 ;;
1356
1357 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1358 # Linux
1359 fragment <<EOF
1360 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1361 break;
1362
1363 EOF
1364 ;;
1365 esac
1366 fi
1367 fragment <<EOF
1368 len = strlen (l->name);
1369 for (search = search_head; search != NULL; search = search->next)
1370 {
1371 char *filename;
1372
1373 if (search->cmdline)
1374 continue;
1375 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1376 sprintf (filename, "%s/%s", search->name, l->name);
1377 nn.name = filename;
1378 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1379 break;
1380 free (filename);
1381 }
1382 if (search != NULL)
1383 break;
1384 EOF
1385 fragment <<EOF
1386 }
1387
1388 if (force < 2)
1389 continue;
1390
1391 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1392 l->name, l->by);
1393 }
1394 }
1395
1396 EOF
1397 fi
1398
1399 fragment <<EOF
1400
1401 /* Look through an expression for an assignment statement. */
1402
1403 static void
1404 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1405 {
1406 bfd_boolean provide = FALSE;
1407
1408 switch (exp->type.node_class)
1409 {
1410 case etree_provide:
1411 case etree_provided:
1412 provide = TRUE;
1413 /* Fall thru */
1414 case etree_assign:
1415 /* We call record_link_assignment even if the symbol is defined.
1416 This is because if it is defined by a dynamic object, we
1417 actually want to use the value defined by the linker script,
1418 not the value from the dynamic object (because we are setting
1419 symbols like etext). If the symbol is defined by a regular
1420 object, then, as it happens, calling record_link_assignment
1421 will do no harm. */
1422 if (strcmp (exp->assign.dst, ".") != 0)
1423 {
1424 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1425 &link_info,
1426 exp->assign.dst, provide,
1427 exp->assign.hidden))
1428 einfo ("%P%F: failed to record assignment to %s: %E\n",
1429 exp->assign.dst);
1430 }
1431 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1432 break;
1433
1434 case etree_binary:
1435 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1436 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1437 break;
1438
1439 case etree_trinary:
1440 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1441 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1442 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1443 break;
1444
1445 case etree_unary:
1446 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1447 break;
1448
1449 default:
1450 break;
1451 }
1452 }
1453
1454
1455 /* This is called by the before_allocation routine via
1456 lang_for_each_statement. It locates any assignment statements, and
1457 tells the ELF backend about them, in case they are assignments to
1458 symbols which are referred to by dynamic objects. */
1459
1460 static void
1461 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1462 {
1463 if (s->header.type == lang_assignment_statement_enum)
1464 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1465 }
1466
1467 EOF
1468
1469 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1470 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1471 ELF_INTERPRETER_SET_DEFAULT="
1472 if (sinterp != NULL)
1473 {
1474 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1475 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1476 }
1477
1478 "
1479 else
1480 ELF_INTERPRETER_SET_DEFAULT=
1481 fi
1482 fragment <<EOF
1483
1484 /* used by before_allocation and handle_option. */
1485 static void
1486 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1487 {
1488 if (*to == NULL)
1489 *to = xstrdup (op_arg);
1490 else
1491 {
1492 size_t to_len = strlen (*to);
1493 size_t op_arg_len = strlen (op_arg);
1494 char *buf;
1495 char *cp = *to;
1496
1497 /* First see whether OPTARG is already in the path. */
1498 do
1499 {
1500 if (strncmp (op_arg, cp, op_arg_len) == 0
1501 && (cp[op_arg_len] == 0
1502 || cp[op_arg_len] == config.rpath_separator))
1503 /* We found it. */
1504 break;
1505
1506 /* Not yet found. */
1507 cp = strchr (cp, config.rpath_separator);
1508 if (cp != NULL)
1509 ++cp;
1510 }
1511 while (cp != NULL);
1512
1513 if (cp == NULL)
1514 {
1515 buf = xmalloc (to_len + op_arg_len + 2);
1516 sprintf (buf, "%s%c%s", *to,
1517 config.rpath_separator, op_arg);
1518 free (*to);
1519 *to = buf;
1520 }
1521 }
1522 }
1523
1524 /* This is called after the sections have been attached to output
1525 sections, but before any sizes or addresses have been set. */
1526
1527 static void
1528 gld${EMULATION_NAME}_before_allocation (void)
1529 {
1530 const char *rpath;
1531 asection *sinterp;
1532 bfd *abfd;
1533
1534 if (link_info.hash->type == bfd_link_elf_hash_table)
1535 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1536
1537 /* If we are going to make any variable assignments, we need to let
1538 the ELF backend know about them in case the variables are
1539 referred to by dynamic objects. */
1540 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1541
1542 /* Let the ELF backend work out the sizes of any sections required
1543 by dynamic linking. */
1544 rpath = command_line.rpath;
1545 if (rpath == NULL)
1546 rpath = (const char *) getenv ("LD_RUN_PATH");
1547
1548 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1549 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1550 {
1551 const char *audit_libs = elf_dt_audit (abfd);
1552
1553 /* If the input bfd contains an audit entry, we need to add it as
1554 a dep audit entry. */
1555 if (audit_libs && *audit_libs != '\0')
1556 {
1557 char *cp = xstrdup (audit_libs);
1558 do
1559 {
1560 int more = 0;
1561 char *cp2 = strchr (cp, config.rpath_separator);
1562
1563 if (cp2)
1564 {
1565 *cp2 = '\0';
1566 more = 1;
1567 }
1568
1569 if (cp != NULL && *cp != '\0')
1570 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1571
1572 cp = more ? ++cp2 : NULL;
1573 }
1574 while (cp != NULL);
1575 }
1576 }
1577
1578 if (! (bfd_elf_size_dynamic_sections
1579 (link_info.output_bfd, command_line.soname, rpath,
1580 command_line.filter_shlib, audit, depaudit,
1581 (const char * const *) command_line.auxiliary_filters,
1582 &link_info, &sinterp)))
1583 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1584
1585 ${ELF_INTERPRETER_SET_DEFAULT}
1586 /* Let the user override the dynamic linker we are using. */
1587 if (command_line.interpreter != NULL
1588 && sinterp != NULL)
1589 {
1590 sinterp->contents = (bfd_byte *) command_line.interpreter;
1591 sinterp->size = strlen (command_line.interpreter) + 1;
1592 }
1593
1594 /* Look for any sections named .gnu.warning. As a GNU extensions,
1595 we treat such sections as containing warning messages. We print
1596 out the warning message, and then zero out the section size so
1597 that it does not get copied into the output file. */
1598
1599 {
1600 LANG_FOR_EACH_INPUT_STATEMENT (is)
1601 {
1602 asection *s;
1603 bfd_size_type sz;
1604 char *msg;
1605 bfd_boolean ret;
1606
1607 if (is->flags.just_syms)
1608 continue;
1609
1610 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1611 if (s == NULL)
1612 continue;
1613
1614 sz = s->size;
1615 msg = (char *) xmalloc ((size_t) (sz + 1));
1616 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1617 (file_ptr) 0, sz))
1618 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1619 is->the_bfd);
1620 msg[sz] = '\0';
1621 ret = link_info.callbacks->warning (&link_info, msg,
1622 (const char *) NULL,
1623 is->the_bfd, (asection *) NULL,
1624 (bfd_vma) 0);
1625 ASSERT (ret);
1626 free (msg);
1627
1628 /* Clobber the section size, so that we don't waste space
1629 copying the warning into the output file. If we've already
1630 sized the output section, adjust its size. The adjustment
1631 is on rawsize because targets that size sections early will
1632 have called lang_reset_memory_regions after sizing. */
1633 if (s->output_section != NULL
1634 && s->output_section->rawsize >= s->size)
1635 s->output_section->rawsize -= s->size;
1636
1637 s->size = 0;
1638
1639 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1640 warning section don't get copied to the output. */
1641 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1642 }
1643 }
1644
1645 before_allocation_default ();
1646
1647 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1648 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1649 }
1650
1651 EOF
1652 fi
1653
1654 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1655 fragment <<EOF
1656
1657 /* Try to open a dynamic archive. This is where we know that ELF
1658 dynamic libraries have an extension of .so (or .sl on oddball systems
1659 like hpux). */
1660
1661 static bfd_boolean
1662 gld${EMULATION_NAME}_open_dynamic_archive
1663 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1664 {
1665 const char *filename;
1666 char *string;
1667
1668 if (! entry->flags.maybe_archive)
1669 return FALSE;
1670
1671 filename = entry->filename;
1672
1673 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1674 is defined, but it does not seem worth the headache to optimize
1675 away those two bytes of space. */
1676 string = (char *) xmalloc (strlen (search->name)
1677 + strlen (filename)
1678 + strlen (arch)
1679 #ifdef EXTRA_SHLIB_EXTENSION
1680 + strlen (EXTRA_SHLIB_EXTENSION)
1681 #endif
1682 + sizeof "/lib.so");
1683
1684 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1685
1686 #ifdef EXTRA_SHLIB_EXTENSION
1687 /* Try the .so extension first. If that fails build a new filename
1688 using EXTRA_SHLIB_EXTENSION. */
1689 if (! ldfile_try_open_bfd (string, entry))
1690 {
1691 sprintf (string, "%s/lib%s%s%s", search->name,
1692 filename, arch, EXTRA_SHLIB_EXTENSION);
1693 #endif
1694
1695 if (! ldfile_try_open_bfd (string, entry))
1696 {
1697 free (string);
1698 return FALSE;
1699 }
1700 #ifdef EXTRA_SHLIB_EXTENSION
1701 }
1702 #endif
1703
1704 entry->filename = string;
1705
1706 /* We have found a dynamic object to include in the link. The ELF
1707 backend linker will create a DT_NEEDED entry in the .dynamic
1708 section naming this file. If this file includes a DT_SONAME
1709 entry, it will be used. Otherwise, the ELF linker will just use
1710 the name of the file. For an archive found by searching, like
1711 this one, the DT_NEEDED entry should consist of just the name of
1712 the file, without the path information used to find it. Note
1713 that we only need to do this if we have a dynamic object; an
1714 archive will never be referenced by a DT_NEEDED entry.
1715
1716 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1717 very pretty. I haven't been able to think of anything that is
1718 pretty, though. */
1719 if (bfd_check_format (entry->the_bfd, bfd_object)
1720 && (entry->the_bfd->flags & DYNAMIC) != 0)
1721 {
1722 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1723
1724 /* Rather than duplicating the logic above. Just use the
1725 filename we recorded earlier. */
1726
1727 filename = lbasename (entry->filename);
1728 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1729 }
1730
1731 return TRUE;
1732 }
1733
1734 EOF
1735 fi
1736
1737 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1738 fragment <<EOF
1739
1740 /* A variant of lang_output_section_find used by place_orphan. */
1741
1742 static lang_output_section_statement_type *
1743 output_rel_find (asection *sec, int isdyn)
1744 {
1745 lang_output_section_statement_type *lookup;
1746 lang_output_section_statement_type *last = NULL;
1747 lang_output_section_statement_type *last_alloc = NULL;
1748 lang_output_section_statement_type *last_ro_alloc = NULL;
1749 lang_output_section_statement_type *last_rel = NULL;
1750 lang_output_section_statement_type *last_rel_alloc = NULL;
1751 int rela = sec->name[4] == 'a';
1752
1753 for (lookup = &lang_output_section_statement.head->output_section_statement;
1754 lookup != NULL;
1755 lookup = lookup->next)
1756 {
1757 if (lookup->constraint >= 0
1758 && CONST_STRNEQ (lookup->name, ".rel"))
1759 {
1760 int lookrela = lookup->name[4] == 'a';
1761
1762 /* .rel.dyn must come before all other reloc sections, to suit
1763 GNU ld.so. */
1764 if (isdyn)
1765 break;
1766
1767 /* Don't place after .rel.plt as doing so results in wrong
1768 dynamic tags. */
1769 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1770 break;
1771
1772 if (rela == lookrela || last_rel == NULL)
1773 last_rel = lookup;
1774 if ((rela == lookrela || last_rel_alloc == NULL)
1775 && lookup->bfd_section != NULL
1776 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1777 last_rel_alloc = lookup;
1778 }
1779
1780 last = lookup;
1781 if (lookup->bfd_section != NULL
1782 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1783 {
1784 last_alloc = lookup;
1785 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1786 last_ro_alloc = lookup;
1787 }
1788 }
1789
1790 if (last_rel_alloc)
1791 return last_rel_alloc;
1792
1793 if (last_rel)
1794 return last_rel;
1795
1796 if (last_ro_alloc)
1797 return last_ro_alloc;
1798
1799 if (last_alloc)
1800 return last_alloc;
1801
1802 return last;
1803 }
1804
1805 /* Place an orphan section. We use this to put random SHF_ALLOC
1806 sections in the right segment. */
1807
1808 static lang_output_section_statement_type *
1809 gld${EMULATION_NAME}_place_orphan (asection *s,
1810 const char *secname,
1811 int constraint)
1812 {
1813 static struct orphan_save hold[] =
1814 {
1815 { ".text",
1816 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1817 0, 0, 0, 0 },
1818 { ".rodata",
1819 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1820 0, 0, 0, 0 },
1821 { ".data",
1822 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1823 0, 0, 0, 0 },
1824 { ".bss",
1825 SEC_ALLOC,
1826 0, 0, 0, 0 },
1827 { 0,
1828 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1829 0, 0, 0, 0 },
1830 { ".interp",
1831 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1832 0, 0, 0, 0 },
1833 { ".sdata",
1834 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1835 0, 0, 0, 0 },
1836 { ".comment",
1837 SEC_HAS_CONTENTS,
1838 0, 0, 0, 0 },
1839 };
1840 enum orphan_save_index
1841 {
1842 orphan_text = 0,
1843 orphan_rodata,
1844 orphan_data,
1845 orphan_bss,
1846 orphan_rel,
1847 orphan_interp,
1848 orphan_sdata,
1849 orphan_nonalloc
1850 };
1851 static int orphan_init_done = 0;
1852 struct orphan_save *place;
1853 lang_output_section_statement_type *after;
1854 lang_output_section_statement_type *os;
1855 lang_output_section_statement_type *match_by_name = NULL;
1856 int isdyn = 0;
1857 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1858 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1859
1860 if (! link_info.relocatable
1861 && link_info.combreloc
1862 && (s->flags & SEC_ALLOC))
1863 {
1864 if (iself)
1865 switch (sh_type)
1866 {
1867 case SHT_RELA:
1868 secname = ".rela.dyn";
1869 isdyn = 1;
1870 break;
1871 case SHT_REL:
1872 secname = ".rel.dyn";
1873 isdyn = 1;
1874 break;
1875 default:
1876 break;
1877 }
1878 else if (CONST_STRNEQ (secname, ".rel"))
1879 {
1880 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1881 isdyn = 1;
1882 }
1883 }
1884
1885 /* Look through the script to see where to place this section. */
1886 if (constraint == 0)
1887 for (os = lang_output_section_find (secname);
1888 os != NULL;
1889 os = next_matching_output_section_statement (os, 0))
1890 {
1891 /* If we don't match an existing output section, tell
1892 lang_insert_orphan to create a new output section. */
1893 constraint = SPECIAL;
1894
1895 if (os->bfd_section != NULL
1896 && (os->bfd_section->flags == 0
1897 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1898 os->bfd_section,
1899 s->owner, s)
1900 && ((s->flags ^ os->bfd_section->flags)
1901 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1902 {
1903 /* We already have an output section statement with this
1904 name, and its bfd section has compatible flags.
1905 If the section already exists but does not have any flags
1906 set, then it has been created by the linker, probably as a
1907 result of a --section-start command line switch. */
1908 lang_add_section (&os->children, s, NULL, os);
1909 return os;
1910 }
1911
1912 /* Save unused output sections in case we can match them
1913 against orphans later. */
1914 if (os->bfd_section == NULL)
1915 match_by_name = os;
1916 }
1917
1918 /* If we didn't match an active output section, see if we matched an
1919 unused one and use that. */
1920 if (match_by_name)
1921 {
1922 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1923 return match_by_name;
1924 }
1925
1926 if (!orphan_init_done)
1927 {
1928 struct orphan_save *ho;
1929
1930 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1931 if (ho->name != NULL)
1932 {
1933 ho->os = lang_output_section_find (ho->name);
1934 if (ho->os != NULL && ho->os->flags == 0)
1935 ho->os->flags = ho->flags;
1936 }
1937 orphan_init_done = 1;
1938 }
1939
1940 /* If this is a final link, then always put .gnu.warning.SYMBOL
1941 sections into the .text section to get them out of the way. */
1942 if (link_info.executable
1943 && ! link_info.relocatable
1944 && CONST_STRNEQ (s->name, ".gnu.warning.")
1945 && hold[orphan_text].os != NULL)
1946 {
1947 os = hold[orphan_text].os;
1948 lang_add_section (&os->children, s, NULL, os);
1949 return os;
1950 }
1951
1952 /* Decide which segment the section should go in based on the
1953 section name and section flags. We put loadable .note sections
1954 right after the .interp section, so that the PT_NOTE segment is
1955 stored right after the program headers where the OS can read it
1956 in the first page. */
1957
1958 place = NULL;
1959 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1960 place = &hold[orphan_nonalloc];
1961 else if ((s->flags & SEC_ALLOC) == 0)
1962 ;
1963 else if ((s->flags & SEC_LOAD) != 0
1964 && ((iself && sh_type == SHT_NOTE)
1965 || (!iself && CONST_STRNEQ (secname, ".note"))))
1966 place = &hold[orphan_interp];
1967 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1968 place = &hold[orphan_bss];
1969 else if ((s->flags & SEC_SMALL_DATA) != 0)
1970 place = &hold[orphan_sdata];
1971 else if ((s->flags & SEC_READONLY) == 0)
1972 place = &hold[orphan_data];
1973 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1974 || (!iself && CONST_STRNEQ (secname, ".rel")))
1975 && (s->flags & SEC_LOAD) != 0)
1976 place = &hold[orphan_rel];
1977 else if ((s->flags & SEC_CODE) == 0)
1978 place = &hold[orphan_rodata];
1979 else
1980 place = &hold[orphan_text];
1981
1982 after = NULL;
1983 if (place != NULL)
1984 {
1985 if (place->os == NULL)
1986 {
1987 if (place->name != NULL)
1988 place->os = lang_output_section_find (place->name);
1989 else
1990 place->os = output_rel_find (s, isdyn);
1991 }
1992 after = place->os;
1993 if (after == NULL)
1994 after = lang_output_section_find_by_flags
1995 (s, &place->os, _bfd_elf_match_sections_by_type);
1996 if (after == NULL)
1997 /* *ABS* is always the first output section statement. */
1998 after = &lang_output_section_statement.head->output_section_statement;
1999 }
2000
2001 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
2002 }
2003 EOF
2004 fi
2005
2006 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
2007 fragment <<EOF
2008
2009 static void
2010 gld${EMULATION_NAME}_after_allocation (void)
2011 {
2012 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
2013 &link_info);
2014 gld${EMULATION_NAME}_map_segments (need_layout);
2015 }
2016 EOF
2017 fi
2018
2019 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
2020 fragment <<EOF
2021
2022 static char *
2023 gld${EMULATION_NAME}_get_script (int *isfile)
2024 EOF
2025
2026 if test -n "$COMPILE_IN"
2027 then
2028 # Scripts compiled in.
2029
2030 # sed commands to quote an ld script as a C string.
2031 sc="-f stringify.sed"
2032
2033 fragment <<EOF
2034 {
2035 *isfile = 0;
2036
2037 if (link_info.relocatable && config.build_constructors)
2038 return
2039 EOF
2040 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2041 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
2042 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2043 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2044 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2045 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2046 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2047 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2048 fi
2049 if test -n "$GENERATE_PIE_SCRIPT" ; then
2050 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2051 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2052 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2053 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2054 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2055 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2056 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2057 fi
2058 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2059 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2060 fi
2061 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2062 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2063 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2064 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2065 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2066 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2067 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2068 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2069 fi
2070 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2071 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2072 fi
2073 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2074 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2075 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2076 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2077 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2078 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2079 fi
2080 echo ' ; else return' >> e${EMULATION_NAME}.c
2081 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2082 echo '; }' >> e${EMULATION_NAME}.c
2083
2084 else
2085 # Scripts read from the filesystem.
2086
2087 fragment <<EOF
2088 {
2089 *isfile = 1;
2090
2091 if (link_info.relocatable && config.build_constructors)
2092 return "ldscripts/${EMULATION_NAME}.xu";
2093 else if (link_info.relocatable)
2094 return "ldscripts/${EMULATION_NAME}.xr";
2095 else if (!config.text_read_only)
2096 return "ldscripts/${EMULATION_NAME}.xbn";
2097 EOF
2098 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2099 else
2100 fragment <<EOF
2101 else if (!config.magic_demand_paged)
2102 return "ldscripts/${EMULATION_NAME}.xn";
2103 EOF
2104 fi
2105 if test -n "$GENERATE_PIE_SCRIPT" ; then
2106 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2107 fragment <<EOF
2108 else if (link_info.pie && link_info.combreloc
2109 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2110 return "ldscripts/${EMULATION_NAME}.xdw";
2111 else if (link_info.pie && link_info.combreloc)
2112 return "ldscripts/${EMULATION_NAME}.xdc";
2113 EOF
2114 fi
2115 fragment <<EOF
2116 else if (link_info.pie)
2117 return "ldscripts/${EMULATION_NAME}.xd";
2118 EOF
2119 fi
2120 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2121 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2122 fragment <<EOF
2123 else if (link_info.shared && link_info.combreloc
2124 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2125 return "ldscripts/${EMULATION_NAME}.xsw";
2126 else if (link_info.shared && link_info.combreloc)
2127 return "ldscripts/${EMULATION_NAME}.xsc";
2128 EOF
2129 fi
2130 fragment <<EOF
2131 else if (link_info.shared)
2132 return "ldscripts/${EMULATION_NAME}.xs";
2133 EOF
2134 fi
2135 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2136 fragment <<EOF
2137 else if (link_info.combreloc && link_info.relro
2138 && (link_info.flags & DF_BIND_NOW))
2139 return "ldscripts/${EMULATION_NAME}.xw";
2140 else if (link_info.combreloc)
2141 return "ldscripts/${EMULATION_NAME}.xc";
2142 EOF
2143 fi
2144 fragment <<EOF
2145 else
2146 return "ldscripts/${EMULATION_NAME}.x";
2147 }
2148
2149 EOF
2150 fi
2151 fi
2152
2153 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2154 fragment <<EOF
2155 $PARSE_AND_LIST_PROLOGUE
2156 EOF
2157 fi
2158
2159 fragment <<EOF
2160
2161 #define OPTION_DISABLE_NEW_DTAGS (400)
2162 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2163 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2164 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2165 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2166 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2167 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2168 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2169
2170 static void
2171 gld${EMULATION_NAME}_add_options
2172 (int ns, char **shortopts, int nl, struct option **longopts,
2173 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2174 {
2175 EOF
2176 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2177 fragment <<EOF
2178 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2179 EOF
2180 else
2181 fragment <<EOF
2182 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2183 EOF
2184 fi
2185 fragment <<EOF
2186 static const struct option xtra_long[] = {
2187 EOF
2188 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2189 fragment <<EOF
2190 {"audit", required_argument, NULL, OPTION_AUDIT},
2191 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2192 EOF
2193 fi
2194 fragment <<EOF
2195 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2196 EOF
2197 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2198 fragment <<EOF
2199 {"depaudit", required_argument, NULL, 'P'},
2200 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2201 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2202 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2203 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2204 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2205 EOF
2206 fi
2207 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2208 fragment <<EOF
2209 $PARSE_AND_LIST_LONGOPTS
2210 EOF
2211 fi
2212 fragment <<EOF
2213 {NULL, no_argument, NULL, 0}
2214 };
2215
2216 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2217 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2218 *longopts = (struct option *)
2219 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2220 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2221 }
2222
2223 #define DEFAULT_BUILD_ID_STYLE "sha1"
2224
2225 static bfd_boolean
2226 gld${EMULATION_NAME}_handle_option (int optc)
2227 {
2228 switch (optc)
2229 {
2230 default:
2231 return FALSE;
2232
2233 case OPTION_BUILD_ID:
2234 if (link_info.emit_note_gnu_build_id != NULL)
2235 {
2236 free (link_info.emit_note_gnu_build_id);
2237 link_info.emit_note_gnu_build_id = NULL;
2238 }
2239 if (optarg == NULL)
2240 optarg = DEFAULT_BUILD_ID_STYLE;
2241 if (strcmp (optarg, "none"))
2242 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2243 break;
2244
2245 EOF
2246
2247 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2248 fragment <<EOF
2249 case OPTION_AUDIT:
2250 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2251 break;
2252
2253 case 'P':
2254 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2255 break;
2256
2257 case OPTION_DISABLE_NEW_DTAGS:
2258 link_info.new_dtags = FALSE;
2259 new_dtags_set = TRUE;
2260 break;
2261
2262 case OPTION_ENABLE_NEW_DTAGS:
2263 link_info.new_dtags = TRUE;
2264 new_dtags_set = TRUE;
2265 break;
2266
2267 case OPTION_EH_FRAME_HDR:
2268 link_info.eh_frame_hdr = TRUE;
2269 break;
2270
2271 case OPTION_GROUP:
2272 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2273 /* Groups must be self-contained. */
2274 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2275 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2276 break;
2277
2278 case OPTION_EXCLUDE_LIBS:
2279 add_excluded_libs (optarg);
2280 break;
2281
2282 case OPTION_HASH_STYLE:
2283 link_info.emit_hash = FALSE;
2284 link_info.emit_gnu_hash = FALSE;
2285 if (strcmp (optarg, "sysv") == 0)
2286 link_info.emit_hash = TRUE;
2287 else if (strcmp (optarg, "gnu") == 0)
2288 link_info.emit_gnu_hash = TRUE;
2289 else if (strcmp (optarg, "both") == 0)
2290 {
2291 link_info.emit_hash = TRUE;
2292 link_info.emit_gnu_hash = TRUE;
2293 }
2294 else
2295 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2296 break;
2297
2298 EOF
2299 fi
2300 fragment <<EOF
2301 case 'z':
2302 if (strcmp (optarg, "defs") == 0)
2303 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2304 else if (strcmp (optarg, "muldefs") == 0)
2305 link_info.allow_multiple_definition = TRUE;
2306 else if (CONST_STRNEQ (optarg, "max-page-size="))
2307 {
2308 char *end;
2309
2310 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2311 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2312 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2313 optarg + 14);
2314 }
2315 else if (CONST_STRNEQ (optarg, "common-page-size="))
2316 {
2317 char *end;
2318 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2319 if (*end
2320 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2321 einfo (_("%P%F: invalid common page size \`%s'\n"),
2322 optarg + 17);
2323 }
2324 else if (CONST_STRNEQ (optarg, "stack-size="))
2325 {
2326 char *end;
2327 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2328 if (*end || link_info.stacksize < 0)
2329 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2330 if (!link_info.stacksize)
2331 /* Use -1 for explicit no-stack, because zero means
2332 'default'. */
2333 link_info.stacksize = -1;
2334 }
2335 else if (strcmp (optarg, "execstack") == 0)
2336 {
2337 link_info.execstack = TRUE;
2338 link_info.noexecstack = FALSE;
2339 }
2340 else if (strcmp (optarg, "noexecstack") == 0)
2341 {
2342 link_info.noexecstack = TRUE;
2343 link_info.execstack = FALSE;
2344 }
2345 EOF
2346 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2347 fragment <<EOF
2348 else if (strcmp (optarg, "global") == 0)
2349 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2350 else if (strcmp (optarg, "initfirst") == 0)
2351 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2352 else if (strcmp (optarg, "interpose") == 0)
2353 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2354 else if (strcmp (optarg, "loadfltr") == 0)
2355 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2356 else if (strcmp (optarg, "nodefaultlib") == 0)
2357 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2358 else if (strcmp (optarg, "nodelete") == 0)
2359 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2360 else if (strcmp (optarg, "nodlopen") == 0)
2361 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2362 else if (strcmp (optarg, "nodump") == 0)
2363 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2364 else if (strcmp (optarg, "now") == 0)
2365 {
2366 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2367 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2368 }
2369 else if (strcmp (optarg, "lazy") == 0)
2370 {
2371 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2372 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2373 }
2374 else if (strcmp (optarg, "origin") == 0)
2375 {
2376 link_info.flags |= (bfd_vma) DF_ORIGIN;
2377 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2378 }
2379 else if (strcmp (optarg, "combreloc") == 0)
2380 link_info.combreloc = TRUE;
2381 else if (strcmp (optarg, "nocombreloc") == 0)
2382 link_info.combreloc = FALSE;
2383 else if (strcmp (optarg, "nocopyreloc") == 0)
2384 link_info.nocopyreloc = TRUE;
2385 else if (strcmp (optarg, "relro") == 0)
2386 link_info.relro = TRUE;
2387 else if (strcmp (optarg, "norelro") == 0)
2388 link_info.relro = FALSE;
2389 else if (strcmp (optarg, "text") == 0)
2390 link_info.error_textrel = TRUE;
2391 else if (strcmp (optarg, "notext") == 0)
2392 link_info.error_textrel = FALSE;
2393 else if (strcmp (optarg, "textoff") == 0)
2394 link_info.error_textrel = FALSE;
2395 EOF
2396 fi
2397
2398 fragment <<EOF
2399 else
2400 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2401 break;
2402 EOF
2403
2404 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2405 fragment <<EOF
2406 $PARSE_AND_LIST_ARGS_CASES
2407 EOF
2408 fi
2409
2410 fragment <<EOF
2411 }
2412
2413 return TRUE;
2414 }
2415
2416 EOF
2417
2418 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2419 fragment <<EOF
2420
2421 static void
2422 gld${EMULATION_NAME}_list_options (FILE * file)
2423 {
2424 EOF
2425 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2426 fragment <<EOF
2427 fprintf (file, _("\
2428 --audit=AUDITLIB Specify a library to use for auditing\n"));
2429 fprintf (file, _("\
2430 -Bgroup Selects group name lookup rules for DSO\n"));
2431 EOF
2432 fi
2433 fragment <<EOF
2434 fprintf (file, _("\
2435 --build-id[=STYLE] Generate build ID note\n"));
2436 EOF
2437 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2438 fragment <<EOF
2439 fprintf (file, _("\
2440 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2441 Specify a library to use for auditing dependencies\n"));
2442 fprintf (file, _("\
2443 --disable-new-dtags Disable new dynamic tags\n"));
2444 fprintf (file, _("\
2445 --enable-new-dtags Enable new dynamic tags\n"));
2446 fprintf (file, _("\
2447 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2448 fprintf (file, _("\
2449 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2450 fprintf (file, _("\
2451 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2452 fprintf (file, _("\
2453 -z combreloc Merge dynamic relocs into one section and sort\n"));
2454 EOF
2455 fi
2456
2457 fragment <<EOF
2458 fprintf (file, _("\
2459 -z common-page-size=SIZE Set common page size to SIZE\n"));
2460 fprintf (file, _("\
2461 -z defs Report unresolved symbols in object files.\n"));
2462 fprintf (file, _("\
2463 -z execstack Mark executable as requiring executable stack\n"));
2464 EOF
2465
2466 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2467 fragment <<EOF
2468 fprintf (file, _("\
2469 -z global Make symbols in DSO available for subsequently\n\
2470 loaded objects\n"));
2471 fprintf (file, _("\
2472 -z initfirst Mark DSO to be initialized first at runtime\n"));
2473 fprintf (file, _("\
2474 -z interpose Mark object to interpose all DSOs but executable\n"));
2475 fprintf (file, _("\
2476 -z lazy Mark object lazy runtime binding (default)\n"));
2477 fprintf (file, _("\
2478 -z loadfltr Mark object requiring immediate process\n"));
2479 EOF
2480 fi
2481
2482 fragment <<EOF
2483 fprintf (file, _("\
2484 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2485 fprintf (file, _("\
2486 -z muldefs Allow multiple definitions\n"));
2487 EOF
2488
2489 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2490 fragment <<EOF
2491 fprintf (file, _("\
2492 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2493 fprintf (file, _("\
2494 -z nocopyreloc Don't create copy relocs\n"));
2495 fprintf (file, _("\
2496 -z nodefaultlib Mark object not to use default search paths\n"));
2497 fprintf (file, _("\
2498 -z nodelete Mark DSO non-deletable at runtime\n"));
2499 fprintf (file, _("\
2500 -z nodlopen Mark DSO not available to dlopen\n"));
2501 fprintf (file, _("\
2502 -z nodump Mark DSO not available to dldump\n"));
2503 EOF
2504 fi
2505 fragment <<EOF
2506 fprintf (file, _("\
2507 -z noexecstack Mark executable as not requiring executable stack\n"));
2508 EOF
2509 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2510 fragment <<EOF
2511 fprintf (file, _("\
2512 -z norelro Don't create RELRO program header\n"));
2513 fprintf (file, _("\
2514 -z now Mark object non-lazy runtime binding\n"));
2515 fprintf (file, _("\
2516 -z origin Mark object requiring immediate \$ORIGIN\n\
2517 processing at runtime\n"));
2518 fprintf (file, _("\
2519 -z relro Create RELRO program header\n"));
2520 fprintf (file, _("\
2521 -z stacksize=SIZE Set size of stack segment\n"));
2522 EOF
2523 fi
2524
2525 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2526 fragment <<EOF
2527 $PARSE_AND_LIST_OPTIONS
2528 EOF
2529 fi
2530
2531 fragment <<EOF
2532 }
2533 EOF
2534
2535 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2536 fragment <<EOF
2537 $PARSE_AND_LIST_EPILOGUE
2538 EOF
2539 fi
2540 fi
2541
2542 fragment <<EOF
2543
2544 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2545 {
2546 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2547 ${LDEMUL_SYSLIB-syslib_default},
2548 ${LDEMUL_HLL-hll_default},
2549 ${LDEMUL_AFTER_PARSE-gld${EMULATION_NAME}_after_parse},
2550 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2551 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2552 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2553 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2554 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2555 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2556 "${EMULATION_NAME}",
2557 "${OUTPUT_FORMAT}",
2558 ${LDEMUL_FINISH-finish_default},
2559 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2560 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2561 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2562 ${LDEMUL_SET_SYMBOLS-NULL},
2563 ${LDEMUL_PARSE_ARGS-NULL},
2564 gld${EMULATION_NAME}_add_options,
2565 gld${EMULATION_NAME}_handle_option,
2566 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2567 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2568 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2569 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2570 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2571 };
2572 EOF