251c5110823147e9b121c8c5b168aca6b65bb5aa
[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)
897 {
898 const char *style = emit_note_gnu_build_id;
899 bfd_size_type size;
900
901 abfd = abfd;
902
903 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
904 size = (size + 3) & -(bfd_size_type) 4;
905
906 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
907 size += 128 / 8;
908 else if (!strcmp (style, "sha1"))
909 size += 160 / 8;
910 else if (!strncmp (style, "0x", 2))
911 {
912 /* ID is in string form (hex). Convert to bits. */
913 const char *id = style + 2;
914 do
915 {
916 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
917 {
918 ++size;
919 id += 2;
920 }
921 else if (*id == '-' || *id == ':')
922 ++id;
923 else
924 {
925 size = 0;
926 break;
927 }
928 } while (*id != '\0');
929 }
930 else
931 size = 0;
932
933 return size;
934 }
935
936 static unsigned char
937 read_hex (const char xdigit)
938 {
939 if (ISDIGIT (xdigit))
940 return xdigit - '0';
941 if (ISUPPER (xdigit))
942 return xdigit - 'A' + 0xa;
943 if (ISLOWER (xdigit))
944 return xdigit - 'a' + 0xa;
945 abort ();
946 return 0;
947 }
948
949 static bfd_boolean
950 write_build_id (bfd *abfd)
951 {
952 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
953 struct elf_obj_tdata *t = elf_tdata (abfd);
954 const char *style;
955 asection *asec;
956 Elf_Internal_Shdr *i_shdr;
957 unsigned char *contents, *id_bits;
958 bfd_size_type size;
959 file_ptr position;
960 Elf_External_Note *e_note;
961 typedef void (*sum_fn) (const void *, size_t, void *);
962
963 style = t->o->build_id.style;
964 asec = t->o->build_id.sec;
965 if (bfd_is_abs_section (asec->output_section))
966 {
967 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
968 " --build-id ignored.\n"));
969 return TRUE;
970 }
971 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
972
973 if (i_shdr->contents == NULL)
974 {
975 if (asec->contents == NULL)
976 asec->contents = (unsigned char *) xmalloc (asec->size);
977 contents = asec->contents;
978 }
979 else
980 contents = i_shdr->contents + asec->output_offset;
981
982 e_note = (Elf_External_Note *) contents;
983 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
984 size = (size + 3) & -(bfd_size_type) 4;
985 id_bits = contents + size;
986 size = asec->size - size;
987
988 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
989 bfd_h_put_32 (abfd, size, &e_note->descsz);
990 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
991 memcpy (e_note->name, "GNU", sizeof "GNU");
992
993 if (strcmp (style, "md5") == 0)
994 {
995 struct md5_ctx ctx;
996
997 md5_init_ctx (&ctx);
998 if (!bed->s->checksum_contents (abfd, (sum_fn) &md5_process_bytes, &ctx))
999 return FALSE;
1000 md5_finish_ctx (&ctx, id_bits);
1001 }
1002 else if (strcmp (style, "sha1") == 0)
1003 {
1004 struct sha1_ctx ctx;
1005
1006 sha1_init_ctx (&ctx);
1007 if (!bed->s->checksum_contents (abfd, (sum_fn) &sha1_process_bytes, &ctx))
1008 return FALSE;
1009 sha1_finish_ctx (&ctx, id_bits);
1010 }
1011 else if (strcmp (style, "uuid") == 0)
1012 {
1013 int n;
1014 int fd = open ("/dev/urandom", O_RDONLY);
1015 if (fd < 0)
1016 return FALSE;
1017 n = read (fd, id_bits, size);
1018 close (fd);
1019 if (n < (int) size)
1020 return FALSE;
1021 }
1022 else if (strncmp (style, "0x", 2) == 0)
1023 {
1024 /* ID is in string form (hex). Convert to bits. */
1025 const char *id = style + 2;
1026 size_t n = 0;
1027 do
1028 {
1029 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1030 {
1031 id_bits[n] = read_hex (*id++) << 4;
1032 id_bits[n++] |= read_hex (*id++);
1033 }
1034 else if (*id == '-' || *id == ':')
1035 ++id;
1036 else
1037 abort (); /* Should have been validated earlier. */
1038 } while (*id != '\0');
1039 }
1040 else
1041 abort (); /* Should have been validated earlier. */
1042
1043 position = i_shdr->sh_offset + asec->output_offset;
1044 size = asec->size;
1045 return (bfd_seek (abfd, position, SEEK_SET) == 0
1046 && bfd_bwrite (contents, size, abfd) == size);
1047 }
1048
1049 /* Make .note.gnu.build-id section, and set up elf_tdata->build_id. */
1050
1051 static bfd_boolean
1052 setup_build_id (bfd *ibfd)
1053 {
1054 asection *s;
1055 bfd_size_type size;
1056 flagword flags;
1057
1058 size = id_note_section_size (ibfd);
1059 if (size == 0)
1060 {
1061 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1062 return FALSE;
1063 }
1064
1065 flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
1066 | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
1067 s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags);
1068 if (s != NULL && bfd_set_section_alignment (ibfd, s, 2))
1069 {
1070 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1071 t->o->build_id.after_write_object_contents = &write_build_id;
1072 t->o->build_id.style = emit_note_gnu_build_id;
1073 t->o->build_id.sec = s;
1074 elf_section_type (s) = SHT_NOTE;
1075 s->size = size;
1076 return TRUE;
1077 }
1078
1079 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1080 " --build-id ignored.\n");
1081 return FALSE;
1082 }
1083
1084 /* This is called after all the input files have been opened. */
1085
1086 static void
1087 gld${EMULATION_NAME}_after_open (void)
1088 {
1089 struct bfd_link_needed_list *needed, *l;
1090 struct elf_link_hash_table *htab;
1091
1092 after_open_default ();
1093
1094 htab = elf_hash_table (&link_info);
1095 if (!is_elf_hash_table (htab))
1096 return;
1097
1098 if (emit_note_gnu_build_id != NULL)
1099 {
1100 bfd *abfd;
1101
1102 /* Find an ELF input. */
1103 for (abfd = link_info.input_bfds;
1104 abfd != (bfd *) NULL; abfd = abfd->link_next)
1105 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1106 break;
1107
1108 /* PR 10555: If there are no ELF input files do not try to
1109 create a .note.gnu-build-id section. */
1110 if (abfd == NULL
1111 || !setup_build_id (abfd))
1112 {
1113 free ((char *) emit_note_gnu_build_id);
1114 emit_note_gnu_build_id = NULL;
1115 }
1116 }
1117
1118 if (link_info.relocatable)
1119 return;
1120
1121 if (link_info.eh_frame_hdr
1122 && !link_info.traditional_format)
1123 {
1124 bfd *abfd, *elfbfd = NULL;
1125 bfd_boolean warn_eh_frame = FALSE;
1126 asection *s;
1127
1128 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1129 {
1130 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1131 elfbfd = abfd;
1132 if (!warn_eh_frame)
1133 {
1134 s = bfd_get_section_by_name (abfd, ".eh_frame");
1135 while (s != NULL
1136 && (s->size <= 8
1137 || bfd_is_abs_section (s->output_section)))
1138 s = bfd_get_next_section_by_name (s);
1139 warn_eh_frame = s != NULL;
1140 }
1141 if (elfbfd && warn_eh_frame)
1142 break;
1143 }
1144 if (elfbfd)
1145 {
1146 const struct elf_backend_data *bed;
1147
1148 bed = get_elf_backend_data (elfbfd);
1149 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1150 bed->dynamic_sec_flags
1151 | SEC_READONLY);
1152 if (s != NULL
1153 && bfd_set_section_alignment (elfbfd, s, 2))
1154 {
1155 htab->eh_info.hdr_sec = s;
1156 warn_eh_frame = FALSE;
1157 }
1158 }
1159 if (warn_eh_frame)
1160 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1161 " --eh-frame-hdr ignored.\n");
1162 }
1163
1164 /* Get the list of files which appear in DT_NEEDED entries in
1165 dynamic objects included in the link (often there will be none).
1166 For each such file, we want to track down the corresponding
1167 library, and include the symbol table in the link. This is what
1168 the runtime dynamic linker will do. Tracking the files down here
1169 permits one dynamic object to include another without requiring
1170 special action by the person doing the link. Note that the
1171 needed list can actually grow while we are stepping through this
1172 loop. */
1173 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1174 for (l = needed; l != NULL; l = l->next)
1175 {
1176 struct bfd_link_needed_list *ll;
1177 struct dt_needed n, nn;
1178 int force;
1179
1180 /* If the lib that needs this one was --as-needed and wasn't
1181 found to be needed, then this lib isn't needed either. */
1182 if (l->by != NULL
1183 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1184 continue;
1185
1186 /* Skip the lib if --no-copy-dt-needed-entries and
1187 --allow-shlib-undefined is in effect. */
1188 if (l->by != NULL
1189 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1190 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1191 continue;
1192
1193 /* If we've already seen this file, skip it. */
1194 for (ll = needed; ll != l; ll = ll->next)
1195 if ((ll->by == NULL
1196 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1197 && strcmp (ll->name, l->name) == 0)
1198 break;
1199 if (ll != l)
1200 continue;
1201
1202 /* See if this file was included in the link explicitly. */
1203 global_needed = l;
1204 global_found = NULL;
1205 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1206 if (global_found != NULL
1207 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1208 & DYN_AS_NEEDED) == 0)
1209 continue;
1210
1211 n.by = l->by;
1212 n.name = l->name;
1213 nn.by = l->by;
1214 if (verbose)
1215 info_msg (_("%s needed by %B\n"), l->name, l->by);
1216
1217 /* As-needed libs specified on the command line (or linker script)
1218 take priority over libs found in search dirs. */
1219 if (global_found != NULL)
1220 {
1221 nn.name = global_found->filename;
1222 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1223 continue;
1224 }
1225
1226 /* We need to find this file and include the symbol table. We
1227 want to search for the file in the same way that the dynamic
1228 linker will search. That means that we want to use
1229 rpath_link, rpath, then the environment variable
1230 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1231 entries (native only), then the linker script LIB_SEARCH_DIRS.
1232 We do not search using the -L arguments.
1233
1234 We search twice. The first time, we skip objects which may
1235 introduce version mismatches. The second time, we force
1236 their use. See gld${EMULATION_NAME}_vercheck comment. */
1237 for (force = 0; force < 2; force++)
1238 {
1239 size_t len;
1240 search_dirs_type *search;
1241 EOF
1242 if [ "x${NATIVE}" = xyes ] ; then
1243 fragment <<EOF
1244 const char *lib_path;
1245 EOF
1246 fi
1247 if [ "x${USE_LIBPATH}" = xyes ] ; then
1248 fragment <<EOF
1249 struct bfd_link_needed_list *rp;
1250 int found;
1251 EOF
1252 fi
1253 fragment <<EOF
1254
1255 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1256 &n, force))
1257 break;
1258 EOF
1259 if [ "x${USE_LIBPATH}" = xyes ] ; then
1260 fragment <<EOF
1261 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1262 &n, force))
1263 break;
1264 EOF
1265 fi
1266 if [ "x${NATIVE}" = xyes ] ; then
1267 fragment <<EOF
1268 if (command_line.rpath_link == NULL
1269 && command_line.rpath == NULL)
1270 {
1271 lib_path = (const char *) getenv ("LD_RUN_PATH");
1272 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1273 force))
1274 break;
1275 }
1276 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1277 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1278 break;
1279 EOF
1280 fi
1281 if [ "x${USE_LIBPATH}" = xyes ] ; then
1282 fragment <<EOF
1283 found = 0;
1284 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1285 for (; !found && rp != NULL; rp = rp->next)
1286 {
1287 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1288 found = (rp->by == l->by
1289 && gld${EMULATION_NAME}_search_needed (tmpname,
1290 &n,
1291 force));
1292 free (tmpname);
1293 }
1294 if (found)
1295 break;
1296
1297 EOF
1298 fi
1299 if [ "x${USE_LIBPATH}" = xyes ] ; then
1300 case ${target} in
1301 *-*-freebsd* | *-*-dragonfly*)
1302 fragment <<EOF
1303 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1304 break;
1305 EOF
1306 # FreeBSD
1307 ;;
1308
1309 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1310 fragment <<EOF
1311 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1312 break;
1313
1314 EOF
1315 # Linux
1316 ;;
1317 esac
1318 fi
1319 fragment <<EOF
1320 len = strlen (l->name);
1321 for (search = search_head; search != NULL; search = search->next)
1322 {
1323 char *filename;
1324
1325 if (search->cmdline)
1326 continue;
1327 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1328 sprintf (filename, "%s/%s", search->name, l->name);
1329 nn.name = filename;
1330 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1331 break;
1332 free (filename);
1333 }
1334 if (search != NULL)
1335 break;
1336 EOF
1337 fragment <<EOF
1338 }
1339
1340 if (force < 2)
1341 continue;
1342
1343 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1344 l->name, l->by);
1345 }
1346 }
1347
1348 EOF
1349 fi
1350
1351 fragment <<EOF
1352
1353 /* Look through an expression for an assignment statement. */
1354
1355 static void
1356 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1357 {
1358 bfd_boolean provide = FALSE;
1359
1360 switch (exp->type.node_class)
1361 {
1362 case etree_provide:
1363 case etree_provided:
1364 provide = TRUE;
1365 /* Fall thru */
1366 case etree_assign:
1367 /* We call record_link_assignment even if the symbol is defined.
1368 This is because if it is defined by a dynamic object, we
1369 actually want to use the value defined by the linker script,
1370 not the value from the dynamic object (because we are setting
1371 symbols like etext). If the symbol is defined by a regular
1372 object, then, as it happens, calling record_link_assignment
1373 will do no harm. */
1374 if (strcmp (exp->assign.dst, ".") != 0)
1375 {
1376 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1377 &link_info,
1378 exp->assign.dst, provide,
1379 exp->assign.hidden))
1380 einfo ("%P%F: failed to record assignment to %s: %E\n",
1381 exp->assign.dst);
1382 }
1383 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1384 break;
1385
1386 case etree_binary:
1387 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1388 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1389 break;
1390
1391 case etree_trinary:
1392 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1393 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1394 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1395 break;
1396
1397 case etree_unary:
1398 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1399 break;
1400
1401 default:
1402 break;
1403 }
1404 }
1405
1406
1407 /* This is called by the before_allocation routine via
1408 lang_for_each_statement. It locates any assignment statements, and
1409 tells the ELF backend about them, in case they are assignments to
1410 symbols which are referred to by dynamic objects. */
1411
1412 static void
1413 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1414 {
1415 if (s->header.type == lang_assignment_statement_enum)
1416 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1417 }
1418
1419 EOF
1420
1421 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1422 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1423 ELF_INTERPRETER_SET_DEFAULT="
1424 if (sinterp != NULL)
1425 {
1426 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1427 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1428 }
1429
1430 "
1431 else
1432 ELF_INTERPRETER_SET_DEFAULT=
1433 fi
1434 fragment <<EOF
1435
1436 /* used by before_allocation and handle_option. */
1437 static void
1438 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1439 {
1440 if (*to == NULL)
1441 *to = xstrdup (op_arg);
1442 else
1443 {
1444 size_t to_len = strlen (*to);
1445 size_t op_arg_len = strlen (op_arg);
1446 char *buf;
1447 char *cp = *to;
1448
1449 /* First see whether OPTARG is already in the path. */
1450 do
1451 {
1452 if (strncmp (op_arg, cp, op_arg_len) == 0
1453 && (cp[op_arg_len] == 0
1454 || cp[op_arg_len] == config.rpath_separator))
1455 /* We found it. */
1456 break;
1457
1458 /* Not yet found. */
1459 cp = strchr (cp, config.rpath_separator);
1460 if (cp != NULL)
1461 ++cp;
1462 }
1463 while (cp != NULL);
1464
1465 if (cp == NULL)
1466 {
1467 buf = xmalloc (to_len + op_arg_len + 2);
1468 sprintf (buf, "%s%c%s", *to,
1469 config.rpath_separator, op_arg);
1470 free (*to);
1471 *to = buf;
1472 }
1473 }
1474 }
1475
1476 /* This is called after the sections have been attached to output
1477 sections, but before any sizes or addresses have been set. */
1478
1479 static void
1480 gld${EMULATION_NAME}_before_allocation (void)
1481 {
1482 const char *rpath;
1483 asection *sinterp;
1484 bfd *abfd;
1485
1486 if (is_elf_hash_table (link_info.hash))
1487 {
1488 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1489
1490 /* If we are going to make any variable assignments, we need to
1491 let the ELF backend know about them in case the variables are
1492 referred to by dynamic objects. */
1493 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1494 }
1495
1496 /* Let the ELF backend work out the sizes of any sections required
1497 by dynamic linking. */
1498 rpath = command_line.rpath;
1499 if (rpath == NULL)
1500 rpath = (const char *) getenv ("LD_RUN_PATH");
1501
1502 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1503 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1504 {
1505 const char *audit_libs = elf_dt_audit (abfd);
1506
1507 /* If the input bfd contains an audit entry, we need to add it as
1508 a dep audit entry. */
1509 if (audit_libs && *audit_libs != '\0')
1510 {
1511 char *cp = xstrdup (audit_libs);
1512 do
1513 {
1514 int more = 0;
1515 char *cp2 = strchr (cp, config.rpath_separator);
1516
1517 if (cp2)
1518 {
1519 *cp2 = '\0';
1520 more = 1;
1521 }
1522
1523 if (cp != NULL && *cp != '\0')
1524 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1525
1526 cp = more ? ++cp2 : NULL;
1527 }
1528 while (cp != NULL);
1529 }
1530 }
1531
1532 if (! (bfd_elf_size_dynamic_sections
1533 (link_info.output_bfd, command_line.soname, rpath,
1534 command_line.filter_shlib, audit, depaudit,
1535 (const char * const *) command_line.auxiliary_filters,
1536 &link_info, &sinterp)))
1537 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1538
1539 ${ELF_INTERPRETER_SET_DEFAULT}
1540 /* Let the user override the dynamic linker we are using. */
1541 if (command_line.interpreter != NULL
1542 && sinterp != NULL)
1543 {
1544 sinterp->contents = (bfd_byte *) command_line.interpreter;
1545 sinterp->size = strlen (command_line.interpreter) + 1;
1546 }
1547
1548 /* Look for any sections named .gnu.warning. As a GNU extensions,
1549 we treat such sections as containing warning messages. We print
1550 out the warning message, and then zero out the section size so
1551 that it does not get copied into the output file. */
1552
1553 {
1554 LANG_FOR_EACH_INPUT_STATEMENT (is)
1555 {
1556 asection *s;
1557 bfd_size_type sz;
1558 char *msg;
1559 bfd_boolean ret;
1560
1561 if (is->flags.just_syms)
1562 continue;
1563
1564 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1565 if (s == NULL)
1566 continue;
1567
1568 sz = s->size;
1569 msg = (char *) xmalloc ((size_t) (sz + 1));
1570 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1571 (file_ptr) 0, sz))
1572 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1573 is->the_bfd);
1574 msg[sz] = '\0';
1575 ret = link_info.callbacks->warning (&link_info, msg,
1576 (const char *) NULL,
1577 is->the_bfd, (asection *) NULL,
1578 (bfd_vma) 0);
1579 ASSERT (ret);
1580 free (msg);
1581
1582 /* Clobber the section size, so that we don't waste space
1583 copying the warning into the output file. If we've already
1584 sized the output section, adjust its size. The adjustment
1585 is on rawsize because targets that size sections early will
1586 have called lang_reset_memory_regions after sizing. */
1587 if (s->output_section != NULL
1588 && s->output_section->rawsize >= s->size)
1589 s->output_section->rawsize -= s->size;
1590
1591 s->size = 0;
1592
1593 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1594 warning section don't get copied to the output. */
1595 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1596 }
1597 }
1598
1599 before_allocation_default ();
1600
1601 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1602 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1603 }
1604
1605 EOF
1606 fi
1607
1608 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1609 fragment <<EOF
1610
1611 /* Try to open a dynamic archive. This is where we know that ELF
1612 dynamic libraries have an extension of .so (or .sl on oddball systems
1613 like hpux). */
1614
1615 static bfd_boolean
1616 gld${EMULATION_NAME}_open_dynamic_archive
1617 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1618 {
1619 const char *filename;
1620 char *string;
1621
1622 if (! entry->flags.maybe_archive)
1623 return FALSE;
1624
1625 filename = entry->filename;
1626
1627 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1628 is defined, but it does not seem worth the headache to optimize
1629 away those two bytes of space. */
1630 string = (char *) xmalloc (strlen (search->name)
1631 + strlen (filename)
1632 + strlen (arch)
1633 #ifdef EXTRA_SHLIB_EXTENSION
1634 + strlen (EXTRA_SHLIB_EXTENSION)
1635 #endif
1636 + sizeof "/lib.so");
1637
1638 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1639
1640 #ifdef EXTRA_SHLIB_EXTENSION
1641 /* Try the .so extension first. If that fails build a new filename
1642 using EXTRA_SHLIB_EXTENSION. */
1643 if (! ldfile_try_open_bfd (string, entry))
1644 {
1645 sprintf (string, "%s/lib%s%s%s", search->name,
1646 filename, arch, EXTRA_SHLIB_EXTENSION);
1647 #endif
1648
1649 if (! ldfile_try_open_bfd (string, entry))
1650 {
1651 free (string);
1652 return FALSE;
1653 }
1654 #ifdef EXTRA_SHLIB_EXTENSION
1655 }
1656 #endif
1657
1658 entry->filename = string;
1659
1660 /* We have found a dynamic object to include in the link. The ELF
1661 backend linker will create a DT_NEEDED entry in the .dynamic
1662 section naming this file. If this file includes a DT_SONAME
1663 entry, it will be used. Otherwise, the ELF linker will just use
1664 the name of the file. For an archive found by searching, like
1665 this one, the DT_NEEDED entry should consist of just the name of
1666 the file, without the path information used to find it. Note
1667 that we only need to do this if we have a dynamic object; an
1668 archive will never be referenced by a DT_NEEDED entry.
1669
1670 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1671 very pretty. I haven't been able to think of anything that is
1672 pretty, though. */
1673 if (bfd_check_format (entry->the_bfd, bfd_object)
1674 && (entry->the_bfd->flags & DYNAMIC) != 0)
1675 {
1676 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1677
1678 /* Rather than duplicating the logic above. Just use the
1679 filename we recorded earlier. */
1680
1681 filename = lbasename (entry->filename);
1682 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1683 }
1684
1685 return TRUE;
1686 }
1687
1688 EOF
1689 fi
1690
1691 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1692 fragment <<EOF
1693
1694 /* A variant of lang_output_section_find used by place_orphan. */
1695
1696 static lang_output_section_statement_type *
1697 output_rel_find (asection *sec, int isdyn)
1698 {
1699 lang_output_section_statement_type *lookup;
1700 lang_output_section_statement_type *last = NULL;
1701 lang_output_section_statement_type *last_alloc = NULL;
1702 lang_output_section_statement_type *last_ro_alloc = NULL;
1703 lang_output_section_statement_type *last_rel = NULL;
1704 lang_output_section_statement_type *last_rel_alloc = NULL;
1705 int rela = sec->name[4] == 'a';
1706
1707 for (lookup = &lang_output_section_statement.head->output_section_statement;
1708 lookup != NULL;
1709 lookup = lookup->next)
1710 {
1711 if (lookup->constraint >= 0
1712 && CONST_STRNEQ (lookup->name, ".rel"))
1713 {
1714 int lookrela = lookup->name[4] == 'a';
1715
1716 /* .rel.dyn must come before all other reloc sections, to suit
1717 GNU ld.so. */
1718 if (isdyn)
1719 break;
1720
1721 /* Don't place after .rel.plt as doing so results in wrong
1722 dynamic tags. */
1723 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1724 break;
1725
1726 if (rela == lookrela || last_rel == NULL)
1727 last_rel = lookup;
1728 if ((rela == lookrela || last_rel_alloc == NULL)
1729 && lookup->bfd_section != NULL
1730 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1731 last_rel_alloc = lookup;
1732 }
1733
1734 last = lookup;
1735 if (lookup->bfd_section != NULL
1736 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1737 {
1738 last_alloc = lookup;
1739 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1740 last_ro_alloc = lookup;
1741 }
1742 }
1743
1744 if (last_rel_alloc)
1745 return last_rel_alloc;
1746
1747 if (last_rel)
1748 return last_rel;
1749
1750 if (last_ro_alloc)
1751 return last_ro_alloc;
1752
1753 if (last_alloc)
1754 return last_alloc;
1755
1756 return last;
1757 }
1758
1759 /* Place an orphan section. We use this to put random SHF_ALLOC
1760 sections in the right segment. */
1761
1762 static lang_output_section_statement_type *
1763 gld${EMULATION_NAME}_place_orphan (asection *s,
1764 const char *secname,
1765 int constraint)
1766 {
1767 static struct orphan_save hold[] =
1768 {
1769 { ".text",
1770 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1771 0, 0, 0, 0 },
1772 { ".rodata",
1773 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1774 0, 0, 0, 0 },
1775 { ".data",
1776 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1777 0, 0, 0, 0 },
1778 { ".bss",
1779 SEC_ALLOC,
1780 0, 0, 0, 0 },
1781 { 0,
1782 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1783 0, 0, 0, 0 },
1784 { ".interp",
1785 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1786 0, 0, 0, 0 },
1787 { ".sdata",
1788 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1789 0, 0, 0, 0 },
1790 { ".comment",
1791 SEC_HAS_CONTENTS,
1792 0, 0, 0, 0 },
1793 };
1794 enum orphan_save_index
1795 {
1796 orphan_text = 0,
1797 orphan_rodata,
1798 orphan_data,
1799 orphan_bss,
1800 orphan_rel,
1801 orphan_interp,
1802 orphan_sdata,
1803 orphan_nonalloc
1804 };
1805 static int orphan_init_done = 0;
1806 struct orphan_save *place;
1807 lang_output_section_statement_type *after;
1808 lang_output_section_statement_type *os;
1809 lang_output_section_statement_type *match_by_name = NULL;
1810 int isdyn = 0;
1811 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1812 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1813
1814 if (! link_info.relocatable
1815 && link_info.combreloc
1816 && (s->flags & SEC_ALLOC))
1817 {
1818 if (iself)
1819 switch (sh_type)
1820 {
1821 case SHT_RELA:
1822 secname = ".rela.dyn";
1823 isdyn = 1;
1824 break;
1825 case SHT_REL:
1826 secname = ".rel.dyn";
1827 isdyn = 1;
1828 break;
1829 default:
1830 break;
1831 }
1832 else if (CONST_STRNEQ (secname, ".rel"))
1833 {
1834 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1835 isdyn = 1;
1836 }
1837 }
1838
1839 /* Look through the script to see where to place this section. */
1840 if (constraint == 0)
1841 for (os = lang_output_section_find (secname);
1842 os != NULL;
1843 os = next_matching_output_section_statement (os, 0))
1844 {
1845 /* If we don't match an existing output section, tell
1846 lang_insert_orphan to create a new output section. */
1847 constraint = SPECIAL;
1848
1849 if (os->bfd_section != NULL
1850 && (os->bfd_section->flags == 0
1851 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1852 os->bfd_section,
1853 s->owner, s)
1854 && ((s->flags ^ os->bfd_section->flags)
1855 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1856 {
1857 /* We already have an output section statement with this
1858 name, and its bfd section has compatible flags.
1859 If the section already exists but does not have any flags
1860 set, then it has been created by the linker, probably as a
1861 result of a --section-start command line switch. */
1862 lang_add_section (&os->children, s, NULL, os);
1863 return os;
1864 }
1865
1866 /* Save unused output sections in case we can match them
1867 against orphans later. */
1868 if (os->bfd_section == NULL)
1869 match_by_name = os;
1870 }
1871
1872 /* If we didn't match an active output section, see if we matched an
1873 unused one and use that. */
1874 if (match_by_name)
1875 {
1876 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1877 return match_by_name;
1878 }
1879
1880 if (!orphan_init_done)
1881 {
1882 struct orphan_save *ho;
1883
1884 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1885 if (ho->name != NULL)
1886 {
1887 ho->os = lang_output_section_find (ho->name);
1888 if (ho->os != NULL && ho->os->flags == 0)
1889 ho->os->flags = ho->flags;
1890 }
1891 orphan_init_done = 1;
1892 }
1893
1894 /* If this is a final link, then always put .gnu.warning.SYMBOL
1895 sections into the .text section to get them out of the way. */
1896 if (link_info.executable
1897 && ! link_info.relocatable
1898 && CONST_STRNEQ (s->name, ".gnu.warning.")
1899 && hold[orphan_text].os != NULL)
1900 {
1901 os = hold[orphan_text].os;
1902 lang_add_section (&os->children, s, NULL, os);
1903 return os;
1904 }
1905
1906 /* Decide which segment the section should go in based on the
1907 section name and section flags. We put loadable .note sections
1908 right after the .interp section, so that the PT_NOTE segment is
1909 stored right after the program headers where the OS can read it
1910 in the first page. */
1911
1912 place = NULL;
1913 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1914 place = &hold[orphan_nonalloc];
1915 else if ((s->flags & SEC_ALLOC) == 0)
1916 ;
1917 else if ((s->flags & SEC_LOAD) != 0
1918 && ((iself && sh_type == SHT_NOTE)
1919 || (!iself && CONST_STRNEQ (secname, ".note"))))
1920 place = &hold[orphan_interp];
1921 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1922 place = &hold[orphan_bss];
1923 else if ((s->flags & SEC_SMALL_DATA) != 0)
1924 place = &hold[orphan_sdata];
1925 else if ((s->flags & SEC_READONLY) == 0)
1926 place = &hold[orphan_data];
1927 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1928 || (!iself && CONST_STRNEQ (secname, ".rel")))
1929 && (s->flags & SEC_LOAD) != 0)
1930 place = &hold[orphan_rel];
1931 else if ((s->flags & SEC_CODE) == 0)
1932 place = &hold[orphan_rodata];
1933 else
1934 place = &hold[orphan_text];
1935
1936 after = NULL;
1937 if (place != NULL)
1938 {
1939 if (place->os == NULL)
1940 {
1941 if (place->name != NULL)
1942 place->os = lang_output_section_find (place->name);
1943 else
1944 place->os = output_rel_find (s, isdyn);
1945 }
1946 after = place->os;
1947 if (after == NULL)
1948 after = lang_output_section_find_by_flags
1949 (s, &place->os, _bfd_elf_match_sections_by_type);
1950 if (after == NULL)
1951 /* *ABS* is always the first output section statement. */
1952 after = &lang_output_section_statement.head->output_section_statement;
1953 }
1954
1955 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1956 }
1957 EOF
1958 fi
1959
1960 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1961 fragment <<EOF
1962
1963 static void
1964 gld${EMULATION_NAME}_after_allocation (void)
1965 {
1966 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1967 &link_info);
1968 gld${EMULATION_NAME}_map_segments (need_layout);
1969 }
1970 EOF
1971 fi
1972
1973 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1974 fragment <<EOF
1975
1976 static char *
1977 gld${EMULATION_NAME}_get_script (int *isfile)
1978 EOF
1979
1980 if test -n "$COMPILE_IN"
1981 then
1982 # Scripts compiled in.
1983
1984 # sed commands to quote an ld script as a C string.
1985 sc="-f stringify.sed"
1986
1987 fragment <<EOF
1988 {
1989 *isfile = 0;
1990
1991 if (link_info.relocatable && config.build_constructors)
1992 return
1993 EOF
1994 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1995 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1996 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1997 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1998 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1999 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2000 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2001 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2002 fi
2003 if test -n "$GENERATE_PIE_SCRIPT" ; then
2004 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2005 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2006 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2007 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2008 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2009 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2010 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2011 fi
2012 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2013 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2014 fi
2015 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2016 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2017 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2018 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2019 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2020 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2021 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2022 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2023 fi
2024 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2025 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2026 fi
2027 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2028 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2029 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2030 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2031 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2032 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2033 fi
2034 echo ' ; else return' >> e${EMULATION_NAME}.c
2035 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2036 echo '; }' >> e${EMULATION_NAME}.c
2037
2038 else
2039 # Scripts read from the filesystem.
2040
2041 fragment <<EOF
2042 {
2043 *isfile = 1;
2044
2045 if (link_info.relocatable && config.build_constructors)
2046 return "ldscripts/${EMULATION_NAME}.xu";
2047 else if (link_info.relocatable)
2048 return "ldscripts/${EMULATION_NAME}.xr";
2049 else if (!config.text_read_only)
2050 return "ldscripts/${EMULATION_NAME}.xbn";
2051 EOF
2052 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2053 else
2054 fragment <<EOF
2055 else if (!config.magic_demand_paged)
2056 return "ldscripts/${EMULATION_NAME}.xn";
2057 EOF
2058 fi
2059 if test -n "$GENERATE_PIE_SCRIPT" ; then
2060 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2061 fragment <<EOF
2062 else if (link_info.pie && link_info.combreloc
2063 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2064 return "ldscripts/${EMULATION_NAME}.xdw";
2065 else if (link_info.pie && link_info.combreloc)
2066 return "ldscripts/${EMULATION_NAME}.xdc";
2067 EOF
2068 fi
2069 fragment <<EOF
2070 else if (link_info.pie)
2071 return "ldscripts/${EMULATION_NAME}.xd";
2072 EOF
2073 fi
2074 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2075 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2076 fragment <<EOF
2077 else if (link_info.shared && link_info.combreloc
2078 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2079 return "ldscripts/${EMULATION_NAME}.xsw";
2080 else if (link_info.shared && link_info.combreloc)
2081 return "ldscripts/${EMULATION_NAME}.xsc";
2082 EOF
2083 fi
2084 fragment <<EOF
2085 else if (link_info.shared)
2086 return "ldscripts/${EMULATION_NAME}.xs";
2087 EOF
2088 fi
2089 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2090 fragment <<EOF
2091 else if (link_info.combreloc && link_info.relro
2092 && (link_info.flags & DF_BIND_NOW))
2093 return "ldscripts/${EMULATION_NAME}.xw";
2094 else if (link_info.combreloc)
2095 return "ldscripts/${EMULATION_NAME}.xc";
2096 EOF
2097 fi
2098 fragment <<EOF
2099 else
2100 return "ldscripts/${EMULATION_NAME}.x";
2101 }
2102
2103 EOF
2104 fi
2105 fi
2106
2107 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2108 fragment <<EOF
2109 $PARSE_AND_LIST_PROLOGUE
2110 EOF
2111 fi
2112
2113 fragment <<EOF
2114
2115 #define OPTION_DISABLE_NEW_DTAGS (400)
2116 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2117 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2118 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2119 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2120 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2121 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2122 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2123
2124 static void
2125 gld${EMULATION_NAME}_add_options
2126 (int ns, char **shortopts, int nl, struct option **longopts,
2127 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2128 {
2129 EOF
2130 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2131 fragment <<EOF
2132 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2133 EOF
2134 else
2135 fragment <<EOF
2136 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2137 EOF
2138 fi
2139 fragment <<EOF
2140 static const struct option xtra_long[] = {
2141 EOF
2142 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2143 fragment <<EOF
2144 {"audit", required_argument, NULL, OPTION_AUDIT},
2145 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2146 EOF
2147 fi
2148 fragment <<EOF
2149 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2150 EOF
2151 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2152 fragment <<EOF
2153 {"depaudit", required_argument, NULL, 'P'},
2154 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2155 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2156 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2157 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2158 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2159 EOF
2160 fi
2161 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2162 fragment <<EOF
2163 $PARSE_AND_LIST_LONGOPTS
2164 EOF
2165 fi
2166 fragment <<EOF
2167 {NULL, no_argument, NULL, 0}
2168 };
2169
2170 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2171 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2172 *longopts = (struct option *)
2173 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2174 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2175 }
2176
2177 #define DEFAULT_BUILD_ID_STYLE "sha1"
2178
2179 static bfd_boolean
2180 gld${EMULATION_NAME}_handle_option (int optc)
2181 {
2182 switch (optc)
2183 {
2184 default:
2185 return FALSE;
2186
2187 case OPTION_BUILD_ID:
2188 if (emit_note_gnu_build_id != NULL)
2189 {
2190 free ((char *) emit_note_gnu_build_id);
2191 emit_note_gnu_build_id = NULL;
2192 }
2193 if (optarg == NULL)
2194 optarg = DEFAULT_BUILD_ID_STYLE;
2195 if (strcmp (optarg, "none"))
2196 emit_note_gnu_build_id = xstrdup (optarg);
2197 break;
2198
2199 EOF
2200
2201 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2202 fragment <<EOF
2203 case OPTION_AUDIT:
2204 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2205 break;
2206
2207 case 'P':
2208 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2209 break;
2210
2211 case OPTION_DISABLE_NEW_DTAGS:
2212 link_info.new_dtags = FALSE;
2213 break;
2214
2215 case OPTION_ENABLE_NEW_DTAGS:
2216 link_info.new_dtags = TRUE;
2217 break;
2218
2219 case OPTION_EH_FRAME_HDR:
2220 link_info.eh_frame_hdr = TRUE;
2221 break;
2222
2223 case OPTION_GROUP:
2224 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2225 /* Groups must be self-contained. */
2226 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2227 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2228 break;
2229
2230 case OPTION_EXCLUDE_LIBS:
2231 add_excluded_libs (optarg);
2232 break;
2233
2234 case OPTION_HASH_STYLE:
2235 link_info.emit_hash = FALSE;
2236 link_info.emit_gnu_hash = FALSE;
2237 if (strcmp (optarg, "sysv") == 0)
2238 link_info.emit_hash = TRUE;
2239 else if (strcmp (optarg, "gnu") == 0)
2240 link_info.emit_gnu_hash = TRUE;
2241 else if (strcmp (optarg, "both") == 0)
2242 {
2243 link_info.emit_hash = TRUE;
2244 link_info.emit_gnu_hash = TRUE;
2245 }
2246 else
2247 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2248 break;
2249
2250 EOF
2251 fi
2252 fragment <<EOF
2253 case 'z':
2254 if (strcmp (optarg, "defs") == 0)
2255 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2256 else if (strcmp (optarg, "muldefs") == 0)
2257 link_info.allow_multiple_definition = TRUE;
2258 else if (CONST_STRNEQ (optarg, "max-page-size="))
2259 {
2260 char *end;
2261
2262 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2263 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2264 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2265 optarg + 14);
2266 }
2267 else if (CONST_STRNEQ (optarg, "common-page-size="))
2268 {
2269 char *end;
2270 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2271 if (*end
2272 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2273 einfo (_("%P%F: invalid common page size \`%s'\n"),
2274 optarg + 17);
2275 }
2276 else if (CONST_STRNEQ (optarg, "stack-size="))
2277 {
2278 char *end;
2279 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2280 if (*end || link_info.stacksize < 0)
2281 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2282 if (!link_info.stacksize)
2283 /* Use -1 for explicit no-stack, because zero means
2284 'default'. */
2285 link_info.stacksize = -1;
2286 }
2287 else if (strcmp (optarg, "execstack") == 0)
2288 {
2289 link_info.execstack = TRUE;
2290 link_info.noexecstack = FALSE;
2291 }
2292 else if (strcmp (optarg, "noexecstack") == 0)
2293 {
2294 link_info.noexecstack = TRUE;
2295 link_info.execstack = FALSE;
2296 }
2297 EOF
2298 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2299 fragment <<EOF
2300 else if (strcmp (optarg, "global") == 0)
2301 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2302 else if (strcmp (optarg, "initfirst") == 0)
2303 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2304 else if (strcmp (optarg, "interpose") == 0)
2305 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2306 else if (strcmp (optarg, "loadfltr") == 0)
2307 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2308 else if (strcmp (optarg, "nodefaultlib") == 0)
2309 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2310 else if (strcmp (optarg, "nodelete") == 0)
2311 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2312 else if (strcmp (optarg, "nodlopen") == 0)
2313 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2314 else if (strcmp (optarg, "nodump") == 0)
2315 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2316 else if (strcmp (optarg, "now") == 0)
2317 {
2318 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2319 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2320 }
2321 else if (strcmp (optarg, "lazy") == 0)
2322 {
2323 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2324 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2325 }
2326 else if (strcmp (optarg, "origin") == 0)
2327 {
2328 link_info.flags |= (bfd_vma) DF_ORIGIN;
2329 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2330 }
2331 else if (strcmp (optarg, "combreloc") == 0)
2332 link_info.combreloc = TRUE;
2333 else if (strcmp (optarg, "nocombreloc") == 0)
2334 link_info.combreloc = FALSE;
2335 else if (strcmp (optarg, "nocopyreloc") == 0)
2336 link_info.nocopyreloc = TRUE;
2337 else if (strcmp (optarg, "relro") == 0)
2338 link_info.relro = TRUE;
2339 else if (strcmp (optarg, "norelro") == 0)
2340 link_info.relro = FALSE;
2341 else if (strcmp (optarg, "text") == 0)
2342 link_info.error_textrel = TRUE;
2343 else if (strcmp (optarg, "notext") == 0)
2344 link_info.error_textrel = FALSE;
2345 else if (strcmp (optarg, "textoff") == 0)
2346 link_info.error_textrel = FALSE;
2347 EOF
2348 fi
2349
2350 fragment <<EOF
2351 else
2352 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2353 break;
2354 EOF
2355
2356 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2357 fragment <<EOF
2358 $PARSE_AND_LIST_ARGS_CASES
2359 EOF
2360 fi
2361
2362 fragment <<EOF
2363 }
2364
2365 return TRUE;
2366 }
2367
2368 EOF
2369
2370 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2371 fragment <<EOF
2372
2373 static void
2374 gld${EMULATION_NAME}_list_options (FILE * file)
2375 {
2376 EOF
2377 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2378 fragment <<EOF
2379 fprintf (file, _("\
2380 --audit=AUDITLIB Specify a library to use for auditing\n"));
2381 fprintf (file, _("\
2382 -Bgroup Selects group name lookup rules for DSO\n"));
2383 EOF
2384 fi
2385 fragment <<EOF
2386 fprintf (file, _("\
2387 --build-id[=STYLE] Generate build ID note\n"));
2388 EOF
2389 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2390 fragment <<EOF
2391 fprintf (file, _("\
2392 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2393 Specify a library to use for auditing dependencies\n"));
2394 fprintf (file, _("\
2395 --disable-new-dtags Disable new dynamic tags\n"));
2396 fprintf (file, _("\
2397 --enable-new-dtags Enable new dynamic tags\n"));
2398 fprintf (file, _("\
2399 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2400 fprintf (file, _("\
2401 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2402 fprintf (file, _("\
2403 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2404 fprintf (file, _("\
2405 -z combreloc Merge dynamic relocs into one section and sort\n"));
2406 EOF
2407 fi
2408
2409 fragment <<EOF
2410 fprintf (file, _("\
2411 -z common-page-size=SIZE Set common page size to SIZE\n"));
2412 fprintf (file, _("\
2413 -z defs Report unresolved symbols in object files.\n"));
2414 fprintf (file, _("\
2415 -z execstack Mark executable as requiring executable stack\n"));
2416 EOF
2417
2418 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2419 fragment <<EOF
2420 fprintf (file, _("\
2421 -z global Make symbols in DSO available for subsequently\n\
2422 loaded objects\n"));
2423 fprintf (file, _("\
2424 -z initfirst Mark DSO to be initialized first at runtime\n"));
2425 fprintf (file, _("\
2426 -z interpose Mark object to interpose all DSOs but executable\n"));
2427 fprintf (file, _("\
2428 -z lazy Mark object lazy runtime binding (default)\n"));
2429 fprintf (file, _("\
2430 -z loadfltr Mark object requiring immediate process\n"));
2431 EOF
2432 fi
2433
2434 fragment <<EOF
2435 fprintf (file, _("\
2436 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2437 fprintf (file, _("\
2438 -z muldefs Allow multiple definitions\n"));
2439 EOF
2440
2441 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2442 fragment <<EOF
2443 fprintf (file, _("\
2444 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2445 fprintf (file, _("\
2446 -z nocopyreloc Don't create copy relocs\n"));
2447 fprintf (file, _("\
2448 -z nodefaultlib Mark object not to use default search paths\n"));
2449 fprintf (file, _("\
2450 -z nodelete Mark DSO non-deletable at runtime\n"));
2451 fprintf (file, _("\
2452 -z nodlopen Mark DSO not available to dlopen\n"));
2453 fprintf (file, _("\
2454 -z nodump Mark DSO not available to dldump\n"));
2455 EOF
2456 fi
2457 fragment <<EOF
2458 fprintf (file, _("\
2459 -z noexecstack Mark executable as not requiring executable stack\n"));
2460 EOF
2461 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2462 fragment <<EOF
2463 fprintf (file, _("\
2464 -z norelro Don't create RELRO program header\n"));
2465 fprintf (file, _("\
2466 -z now Mark object non-lazy runtime binding\n"));
2467 fprintf (file, _("\
2468 -z origin Mark object requiring immediate \$ORIGIN\n\
2469 processing at runtime\n"));
2470 fprintf (file, _("\
2471 -z relro Create RELRO program header\n"));
2472 fprintf (file, _("\
2473 -z stacksize=SIZE Set size of stack segment\n"));
2474 EOF
2475 fi
2476
2477 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2478 fragment <<EOF
2479 $PARSE_AND_LIST_OPTIONS
2480 EOF
2481 fi
2482
2483 fragment <<EOF
2484 }
2485 EOF
2486
2487 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2488 fragment <<EOF
2489 $PARSE_AND_LIST_EPILOGUE
2490 EOF
2491 fi
2492 fi
2493
2494 fragment <<EOF
2495
2496 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2497 {
2498 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2499 ${LDEMUL_SYSLIB-syslib_default},
2500 ${LDEMUL_HLL-hll_default},
2501 ${LDEMUL_AFTER_PARSE-after_parse_default},
2502 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2503 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2504 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2505 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2506 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2507 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2508 "${EMULATION_NAME}",
2509 "${OUTPUT_FORMAT}",
2510 ${LDEMUL_FINISH-finish_default},
2511 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2512 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2513 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2514 ${LDEMUL_SET_SYMBOLS-NULL},
2515 ${LDEMUL_PARSE_ARGS-NULL},
2516 gld${EMULATION_NAME}_add_options,
2517 gld${EMULATION_NAME}_handle_option,
2518 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2519 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2520 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2521 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2522 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2523 };
2524 EOF
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