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