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