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