* ld.texinfo (Expression Section): Describe treatment of numbers
[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 ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
17 Free Software Foundation, Inc.
18 Written by Steve Chamberlain <sac@cygnus.com>
19 ELF support by Ian Lance Taylor <ian@cygnus.com>
20
21 This file is part of the GNU Binutils.
22
23 This program is free software; you can redistribute it and/or modify
24 it under the terms of the GNU General Public License as published by
25 the Free Software Foundation; either version 3 of the License, or
26 (at your option) any later version.
27
28 This program is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
32
33 You should have received a copy of the GNU General Public License
34 along with this program; if not, write to the Free Software
35 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
36 MA 02110-1301, USA. */
37
38 #define TARGET_IS_${EMULATION_NAME}
39
40 #include "sysdep.h"
41 #include "bfd.h"
42 #include "libiberty.h"
43 #include "safe-ctype.h"
44 #include "getopt.h"
45 #include "md5.h"
46 #include "sha1.h"
47 #include <fcntl.h>
48
49 #include "bfdlink.h"
50
51 #include "ld.h"
52 #include "ldmain.h"
53 #include "ldmisc.h"
54 #include "ldexp.h"
55 #include "ldlang.h"
56 #include "ldfile.h"
57 #include "ldemul.h"
58 #include <ldgram.h>
59 #include "elf/common.h"
60 #include "elf-bfd.h"
61 #include "filenames.h"
62
63 /* Declare functions used by various EXTRA_EM_FILEs. */
64 static void gld${EMULATION_NAME}_before_parse (void);
65 static void gld${EMULATION_NAME}_after_open (void);
66 static void gld${EMULATION_NAME}_before_allocation (void);
67 static void gld${EMULATION_NAME}_after_allocation (void);
68 static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan
69 (asection *, const char *, int);
70 EOF
71
72 if [ "x${USE_LIBPATH}" = xyes ] ; then
73 case ${target} in
74 *-*-linux-* | *-*-k*bsd*-*)
75 fragment <<EOF
76 #ifdef HAVE_GLOB
77 #include <glob.h>
78 #endif
79 EOF
80 ;;
81 esac
82 fi
83
84 # Import any needed special functions and/or overrides.
85 #
86 source_em ${srcdir}/emultempl/elf-generic.em
87 if test -n "$EXTRA_EM_FILE" ; then
88 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
89 fi
90
91 # Functions in this file can be overridden by setting the LDEMUL_* shell
92 # variables. If the name of the overriding function is the same as is
93 # defined in this file, then don't output this file's version.
94 # If a different overriding name is given then output the standard function
95 # as presumably it is called from the overriding function.
96 #
97 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
98 fragment <<EOF
99
100 static void
101 gld${EMULATION_NAME}_before_parse (void)
102 {
103 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
104 config.dynamic_link = ${DYNAMIC_LINK-TRUE};
105 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
106 }
107
108 EOF
109 fi
110
111 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
112 fragment <<EOF
113 /* Handle the generation of DT_NEEDED tags. */
114
115 static bfd_boolean
116 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
117 {
118 int link_class = 0;
119
120 /* Tell the ELF linker that we don't want the output file to have a
121 DT_NEEDED entry for this file, unless it is used to resolve
122 references in a regular object. */
123 if (entry->add_DT_NEEDED_for_regular)
124 link_class = DYN_AS_NEEDED;
125
126 /* Tell the ELF linker that we don't want the output file to have a
127 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
128 this file at all. */
129 if (!entry->add_DT_NEEDED_for_dynamic)
130 link_class |= DYN_NO_ADD_NEEDED;
131
132 if (entry->just_syms_flag
133 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
134 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
135 entry->the_bfd);
136
137 if (link_class == 0
138 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
139 return FALSE;
140
141 bfd_elf_set_dyn_lib_class (entry->the_bfd,
142 (enum dynamic_lib_link_class) link_class);
143
144 /* Continue on with normal load_symbols processing. */
145 return FALSE;
146 }
147 EOF
148 fi
149
150 fragment <<EOF
151
152 /* These variables are required to pass information back and forth
153 between after_open and check_needed and stat_needed and vercheck. */
154
155 static struct bfd_link_needed_list *global_needed;
156 static struct stat global_stat;
157 static lang_input_statement_type *global_found;
158 static struct bfd_link_needed_list *global_vercheck_needed;
159 static bfd_boolean global_vercheck_failed;
160
161 /* These variables are used to implement target options */
162
163 static char *audit; /* colon (typically) separated list of libs */
164 static char *depaudit; /* colon (typically) separated list of libs */
165
166 /* On Linux, it's possible to have different versions of the same
167 shared library linked against different versions of libc. The
168 dynamic linker somehow tags which libc version to use in
169 /etc/ld.so.cache, and, based on the libc that it sees in the
170 executable, chooses which version of the shared library to use.
171
172 We try to do a similar check here by checking whether this shared
173 library needs any other shared libraries which may conflict with
174 libraries we have already included in the link. If it does, we
175 skip it, and try to find another shared library farther on down the
176 link path.
177
178 This is called via lang_for_each_input_file.
179 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
180 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
181 a conflicting version. */
182
183 static void
184 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
185 {
186 const char *soname;
187 struct bfd_link_needed_list *l;
188
189 if (global_vercheck_failed)
190 return;
191 if (s->the_bfd == NULL
192 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
193 return;
194
195 soname = bfd_elf_get_dt_soname (s->the_bfd);
196 if (soname == NULL)
197 soname = lbasename (bfd_get_filename (s->the_bfd));
198
199 for (l = global_vercheck_needed; l != NULL; l = l->next)
200 {
201 const char *suffix;
202
203 if (strcmp (soname, l->name) == 0)
204 {
205 /* Probably can't happen, but it's an easy check. */
206 continue;
207 }
208
209 if (strchr (l->name, '/') != NULL)
210 continue;
211
212 suffix = strstr (l->name, ".so.");
213 if (suffix == NULL)
214 continue;
215
216 suffix += sizeof ".so." - 1;
217
218 if (strncmp (soname, l->name, suffix - l->name) == 0)
219 {
220 /* Here we know that S is a dynamic object FOO.SO.VER1, and
221 the object we are considering needs a dynamic object
222 FOO.SO.VER2, and VER1 and VER2 are different. This
223 appears to be a version mismatch, so we tell the caller
224 to try a different version of this library. */
225 global_vercheck_failed = TRUE;
226 return;
227 }
228 }
229 }
230
231
232 /* See if an input file matches a DT_NEEDED entry by running stat on
233 the file. */
234
235 static void
236 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
237 {
238 struct stat st;
239 const char *suffix;
240 const char *soname;
241
242 if (global_found != NULL)
243 return;
244 if (s->the_bfd == NULL)
245 return;
246
247 /* If this input file was an as-needed entry, and wasn't found to be
248 needed at the stage it was linked, then don't say we have loaded it. */
249 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
250 return;
251
252 if (bfd_stat (s->the_bfd, &st) != 0)
253 {
254 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
255 return;
256 }
257
258 /* Some operating systems, e.g. Windows, do not provide a meaningful
259 st_ino; they always set it to zero. (Windows does provide a
260 meaningful st_dev.) Do not indicate a duplicate library in that
261 case. While there is no guarantee that a system that provides
262 meaningful inode numbers will never set st_ino to zero, this is
263 merely an optimization, so we do not need to worry about false
264 negatives. */
265 if (st.st_dev == global_stat.st_dev
266 && st.st_ino == global_stat.st_ino
267 && st.st_ino != 0)
268 {
269 global_found = s;
270 return;
271 }
272
273 /* We issue a warning if it looks like we are including two
274 different versions of the same shared library. For example,
275 there may be a problem if -lc picks up libc.so.6 but some other
276 shared library has a DT_NEEDED entry of libc.so.5. This is a
277 heuristic test, and it will only work if the name looks like
278 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
279 If we really want to issue warnings about mixing version numbers
280 of shared libraries, we need to find a better way. */
281
282 if (strchr (global_needed->name, '/') != NULL)
283 return;
284 suffix = strstr (global_needed->name, ".so.");
285 if (suffix == NULL)
286 return;
287 suffix += sizeof ".so." - 1;
288
289 soname = bfd_elf_get_dt_soname (s->the_bfd);
290 if (soname == NULL)
291 soname = lbasename (s->filename);
292
293 if (strncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
294 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
295 global_needed->name, global_needed->by, soname);
296 }
297
298 struct dt_needed
299 {
300 bfd *by;
301 const char *name;
302 };
303
304 /* This function is called for each possible name for a dynamic object
305 named by a DT_NEEDED entry. The FORCE parameter indicates whether
306 to skip the check for a conflicting version. */
307
308 static bfd_boolean
309 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
310 int force)
311 {
312 bfd *abfd;
313 const char *name = needed->name;
314 const char *soname;
315 int link_class;
316
317 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
318 if (abfd == NULL)
319 return FALSE;
320
321 /* Linker needs to decompress sections. */
322 abfd->flags |= BFD_DECOMPRESS;
323
324 if (! bfd_check_format (abfd, bfd_object))
325 {
326 bfd_close (abfd);
327 return FALSE;
328 }
329 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
330 {
331 bfd_close (abfd);
332 return FALSE;
333 }
334
335 /* For DT_NEEDED, they have to match. */
336 if (abfd->xvec != link_info.output_bfd->xvec)
337 {
338 bfd_close (abfd);
339 return FALSE;
340 }
341
342 /* Check whether this object would include any conflicting library
343 versions. If FORCE is set, then we skip this check; we use this
344 the second time around, if we couldn't find any compatible
345 instance of the shared library. */
346
347 if (! force)
348 {
349 struct bfd_link_needed_list *needs;
350
351 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
352 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
353
354 if (needs != NULL)
355 {
356 global_vercheck_needed = needs;
357 global_vercheck_failed = FALSE;
358 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
359 if (global_vercheck_failed)
360 {
361 bfd_close (abfd);
362 /* Return FALSE to force the caller to move on to try
363 another file on the search path. */
364 return FALSE;
365 }
366
367 /* But wait! It gets much worse. On Linux, if a shared
368 library does not use libc at all, we are supposed to skip
369 it the first time around in case we encounter a shared
370 library later on with the same name which does use the
371 version of libc that we want. This is much too horrible
372 to use on any system other than Linux. */
373
374 EOF
375 case ${target} in
376 *-*-linux-* | *-*-k*bsd*-*)
377 fragment <<EOF
378 {
379 struct bfd_link_needed_list *l;
380
381 for (l = needs; l != NULL; l = l->next)
382 if (CONST_STRNEQ (l->name, "libc.so"))
383 break;
384 if (l == NULL)
385 {
386 bfd_close (abfd);
387 return FALSE;
388 }
389 }
390
391 EOF
392 ;;
393 esac
394 fragment <<EOF
395 }
396 }
397
398 /* We've found a dynamic object matching the DT_NEEDED entry. */
399
400 /* We have already checked that there is no other input file of the
401 same name. We must now check again that we are not including the
402 same file twice. We need to do this because on many systems
403 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
404 reference libc.so.1. If we have already included libc.so, we
405 don't want to include libc.so.1 if they are the same file, and we
406 can only check that using stat. */
407
408 if (bfd_stat (abfd, &global_stat) != 0)
409 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
410
411 /* First strip off everything before the last '/'. */
412 soname = lbasename (abfd->filename);
413
414 if (trace_file_tries)
415 info_msg (_("found %s at %s\n"), soname, name);
416
417 global_found = NULL;
418 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
419 if (global_found != NULL)
420 {
421 /* Return TRUE to indicate that we found the file, even though
422 we aren't going to do anything with it. */
423 return TRUE;
424 }
425
426 /* Specify the soname to use. */
427 bfd_elf_set_dt_needed_name (abfd, soname);
428
429 /* Tell the ELF linker that we don't want the output file to have a
430 DT_NEEDED entry for this file, unless it is used to resolve
431 references in a regular object. */
432 link_class = DYN_DT_NEEDED;
433
434 /* Tell the ELF linker that we don't want the output file to have a
435 DT_NEEDED entry for this file at all if the entry is from a file
436 with DYN_NO_ADD_NEEDED. */
437 if (needed->by != NULL
438 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
439 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
440
441 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
442
443 /* Add this file into the symbol table. */
444 if (! bfd_link_add_symbols (abfd, &link_info))
445 einfo ("%F%B: could not read symbols: %E\n", abfd);
446
447 return TRUE;
448 }
449
450
451 /* Search for a needed file in a path. */
452
453 static bfd_boolean
454 gld${EMULATION_NAME}_search_needed (const char *path,
455 struct dt_needed *n, int force)
456 {
457 const char *s;
458 const char *name = n->name;
459 size_t len;
460 struct dt_needed needed;
461
462 if (name[0] == '/')
463 return gld${EMULATION_NAME}_try_needed (n, force);
464
465 if (path == NULL || *path == '\0')
466 return FALSE;
467
468 needed.by = n->by;
469 needed.name = n->name;
470
471 len = strlen (name);
472 while (1)
473 {
474 char *filename, *sset;
475
476 s = strchr (path, config.rpath_separator);
477 if (s == NULL)
478 s = path + strlen (path);
479
480 #if HAVE_DOS_BASED_FILE_SYSTEM
481 /* Assume a match on the second char is part of drive specifier. */
482 else if (config.rpath_separator == ':'
483 && s == path + 1
484 && ISALPHA (*path))
485 {
486 s = strchr (s + 1, config.rpath_separator);
487 if (s == NULL)
488 s = path + strlen (path);
489 }
490 #endif
491 filename = (char *) xmalloc (s - path + len + 2);
492 if (s == path)
493 sset = filename;
494 else
495 {
496 memcpy (filename, path, s - path);
497 filename[s - path] = '/';
498 sset = filename + (s - path) + 1;
499 }
500 strcpy (sset, name);
501
502 needed.name = filename;
503 if (gld${EMULATION_NAME}_try_needed (&needed, force))
504 return TRUE;
505
506 free (filename);
507
508 if (*s == '\0')
509 break;
510 path = s + 1;
511 }
512
513 return FALSE;
514 }
515
516 EOF
517 if [ "x${USE_LIBPATH}" = xyes ] ; then
518 fragment <<EOF
519
520 /* Add the sysroot to every entry in a path separated by
521 config.rpath_separator. */
522
523 static char *
524 gld${EMULATION_NAME}_add_sysroot (const char *path)
525 {
526 int len, colons, i;
527 char *ret, *p;
528
529 len = strlen (path);
530 colons = 0;
531 i = 0;
532 while (path[i])
533 if (path[i++] == config.rpath_separator)
534 colons++;
535
536 if (path[i])
537 colons++;
538
539 len = len + (colons + 1) * strlen (ld_sysroot);
540 ret = xmalloc (len + 1);
541 strcpy (ret, ld_sysroot);
542 p = ret + strlen (ret);
543 i = 0;
544 while (path[i])
545 if (path[i] == config.rpath_separator)
546 {
547 *p++ = path[i++];
548 strcpy (p, ld_sysroot);
549 p = p + strlen (p);
550 }
551 else
552 *p++ = path[i++];
553
554 *p = 0;
555 return ret;
556 }
557
558 EOF
559 case ${target} in
560 *-*-freebsd* | *-*-dragonfly*)
561 fragment <<EOF
562 /* Read the system search path the FreeBSD way rather than the Linux way. */
563 #ifdef HAVE_ELF_HINTS_H
564 #include <elf-hints.h>
565 #else
566 #include "elf-hints-local.h"
567 #endif
568
569 static bfd_boolean
570 gld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force)
571 {
572 static bfd_boolean initialized;
573 static char *ld_elf_hints;
574 struct dt_needed needed;
575
576 if (!initialized)
577 {
578 FILE *f;
579 char *tmppath;
580
581 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
582 f = fopen (tmppath, FOPEN_RB);
583 free (tmppath);
584 if (f != NULL)
585 {
586 struct elfhints_hdr hdr;
587
588 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
589 && hdr.magic == ELFHINTS_MAGIC
590 && hdr.version == 1)
591 {
592 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
593 {
594 char *b;
595
596 b = xmalloc (hdr.dirlistlen + 1);
597 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
598 hdr.dirlistlen + 1)
599 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
600
601 free (b);
602 }
603 }
604 fclose (f);
605 }
606
607 initialized = TRUE;
608 }
609
610 if (ld_elf_hints == NULL)
611 return FALSE;
612
613 needed.by = NULL;
614 needed.name = name;
615 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,
616 force);
617 }
618 EOF
619 # FreeBSD
620 ;;
621
622 *-*-linux-* | *-*-k*bsd*-*)
623 fragment <<EOF
624 /* For a native linker, check the file /etc/ld.so.conf for directories
625 in which we may find shared libraries. /etc/ld.so.conf is really
626 only meaningful on Linux. */
627
628 struct gld${EMULATION_NAME}_ld_so_conf
629 {
630 char *path;
631 size_t len, alloc;
632 };
633
634 static bfd_boolean
635 gld${EMULATION_NAME}_parse_ld_so_conf
636 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
637
638 static void
639 gld${EMULATION_NAME}_parse_ld_so_conf_include
640 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
641 const char *pattern)
642 {
643 char *newp = NULL;
644 #ifdef HAVE_GLOB
645 glob_t gl;
646 #endif
647
648 if (pattern[0] != '/')
649 {
650 char *p = strrchr (filename, '/');
651 size_t patlen = strlen (pattern) + 1;
652
653 newp = xmalloc (p - filename + 1 + patlen);
654 memcpy (newp, filename, p - filename + 1);
655 memcpy (newp + (p - filename + 1), pattern, patlen);
656 pattern = newp;
657 }
658
659 #ifdef HAVE_GLOB
660 if (glob (pattern, 0, NULL, &gl) == 0)
661 {
662 size_t i;
663
664 for (i = 0; i < gl.gl_pathc; ++i)
665 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
666 globfree (&gl);
667 }
668 #else
669 /* If we do not have glob, treat the pattern as a literal filename. */
670 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
671 #endif
672
673 if (newp)
674 free (newp);
675 }
676
677 static bfd_boolean
678 gld${EMULATION_NAME}_parse_ld_so_conf
679 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
680 {
681 FILE *f = fopen (filename, FOPEN_RT);
682 char *line;
683 size_t linelen;
684
685 if (f == NULL)
686 return FALSE;
687
688 linelen = 256;
689 line = xmalloc (linelen);
690 do
691 {
692 char *p = line, *q;
693
694 /* Normally this would use getline(3), but we need to be portable. */
695 while ((q = fgets (p, linelen - (p - line), f)) != NULL
696 && strlen (q) == linelen - (p - line) - 1
697 && line[linelen - 2] != '\n')
698 {
699 line = xrealloc (line, 2 * linelen);
700 p = line + linelen - 1;
701 linelen += linelen;
702 }
703
704 if (q == NULL && p == line)
705 break;
706
707 p = strchr (line, '\n');
708 if (p)
709 *p = '\0';
710
711 /* Because the file format does not know any form of quoting we
712 can search forward for the next '#' character and if found
713 make it terminating the line. */
714 p = strchr (line, '#');
715 if (p)
716 *p = '\0';
717
718 /* Remove leading whitespace. NUL is no whitespace character. */
719 p = line;
720 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
721 ++p;
722
723 /* If the line is blank it is ignored. */
724 if (p[0] == '\0')
725 continue;
726
727 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
728 {
729 char *dir, c;
730 p += 8;
731 do
732 {
733 while (*p == ' ' || *p == '\t')
734 ++p;
735
736 if (*p == '\0')
737 break;
738
739 dir = p;
740
741 while (*p != ' ' && *p != '\t' && *p)
742 ++p;
743
744 c = *p;
745 *p++ = '\0';
746 if (dir[0] != '\0')
747 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
748 dir);
749 }
750 while (c != '\0');
751 }
752 else
753 {
754 char *dir = p;
755 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
756 && *p != '\r' && *p != '\v')
757 ++p;
758
759 while (p != dir && p[-1] == '/')
760 --p;
761 if (info->path == NULL)
762 {
763 info->alloc = p - dir + 1 + 256;
764 info->path = xmalloc (info->alloc);
765 info->len = 0;
766 }
767 else
768 {
769 if (info->len + 1 + (p - dir) >= info->alloc)
770 {
771 info->alloc += p - dir + 256;
772 info->path = xrealloc (info->path, info->alloc);
773 }
774 info->path[info->len++] = config.rpath_separator;
775 }
776 memcpy (info->path + info->len, dir, p - dir);
777 info->len += p - dir;
778 info->path[info->len] = '\0';
779 }
780 }
781 while (! feof (f));
782 free (line);
783 fclose (f);
784 return TRUE;
785 }
786
787 static bfd_boolean
788 gld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force)
789 {
790 static bfd_boolean initialized;
791 static char *ld_so_conf;
792 struct dt_needed needed;
793
794 if (! initialized)
795 {
796 char *tmppath;
797 struct gld${EMULATION_NAME}_ld_so_conf info;
798
799 info.path = NULL;
800 info.len = info.alloc = 0;
801 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
802 (const char *) NULL);
803 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
804 {
805 free (tmppath);
806 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
807 (const char *) NULL);
808 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
809 }
810 free (tmppath);
811
812 if (info.path)
813 {
814 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
815 free (info.path);
816 ld_so_conf = d;
817 }
818 initialized = TRUE;
819 }
820
821 if (ld_so_conf == NULL)
822 return FALSE;
823
824
825 needed.by = NULL;
826 needed.name = name;
827 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
828 }
829
830 EOF
831 # Linux
832 ;;
833 esac
834 fi
835 fragment <<EOF
836
837 /* See if an input file matches a DT_NEEDED entry by name. */
838
839 static void
840 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
841 {
842 const char *soname;
843
844 /* Stop looking if we've found a loaded lib. */
845 if (global_found != NULL
846 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
847 & DYN_AS_NEEDED) == 0)
848 return;
849
850 if (s->filename == NULL || s->the_bfd == NULL)
851 return;
852
853 /* Don't look for a second non-loaded as-needed lib. */
854 if (global_found != NULL
855 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
856 return;
857
858 if (strcmp (s->filename, global_needed->name) == 0)
859 {
860 global_found = s;
861 return;
862 }
863
864 if (s->search_dirs_flag)
865 {
866 const char *f = strrchr (s->filename, '/');
867 if (f != NULL
868 && strcmp (f + 1, global_needed->name) == 0)
869 {
870 global_found = s;
871 return;
872 }
873 }
874
875 soname = bfd_elf_get_dt_soname (s->the_bfd);
876 if (soname != NULL
877 && strcmp (soname, global_needed->name) == 0)
878 {
879 global_found = s;
880 return;
881 }
882 }
883
884 EOF
885
886 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
887 fragment <<EOF
888
889 static bfd_size_type
890 gld${EMULATION_NAME}_id_note_section_size (bfd *abfd,
891 struct bfd_link_info *linfo)
892 {
893 const char *style = linfo->emit_note_gnu_build_id;
894 bfd_size_type size;
895
896 abfd = abfd;
897
898 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
899 size = (size + 3) & -(bfd_size_type) 4;
900
901 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
902 size += 128 / 8;
903 else if (!strcmp (style, "sha1"))
904 size += 160 / 8;
905 else if (!strncmp (style, "0x", 2))
906 {
907 /* ID is in string form (hex). Convert to bits. */
908 const char *id = style + 2;
909 do
910 {
911 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
912 {
913 ++size;
914 id += 2;
915 }
916 else if (*id == '-' || *id == ':')
917 ++id;
918 else
919 {
920 size = 0;
921 break;
922 }
923 } while (*id != '\0');
924 }
925 else
926 size = 0;
927
928 return size;
929 }
930
931 static unsigned char
932 read_hex (const char xdigit)
933 {
934 if (ISDIGIT (xdigit))
935 return xdigit - '0';
936 if (ISUPPER (xdigit))
937 return xdigit - 'A' + 0xa;
938 if (ISLOWER (xdigit))
939 return xdigit - 'a' + 0xa;
940 abort ();
941 return 0;
942 }
943
944 struct build_id_info
945 {
946 const char *style;
947 asection *sec;
948 };
949
950 static bfd_boolean
951 gld${EMULATION_NAME}_write_build_id_section (bfd *abfd)
952 {
953 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
954 struct build_id_info *info = (struct build_id_info *)
955 elf_tdata (abfd)->after_write_object_contents_info;
956 asection *asec;
957 Elf_Internal_Shdr *i_shdr;
958 unsigned char *contents, *id_bits;
959 bfd_size_type size;
960 Elf_External_Note *e_note;
961
962 asec = info->sec;
963 if (bfd_is_abs_section (asec->output_section))
964 {
965 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
966 " --build-id ignored.\n"));
967 return TRUE;
968 }
969 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
970
971 if (i_shdr->contents == NULL)
972 {
973 if (asec->contents == NULL)
974 asec->contents = (unsigned char *) xmalloc (asec->size);
975 contents = asec->contents;
976 }
977 else
978 contents = i_shdr->contents + asec->output_offset;
979
980 e_note = (Elf_External_Note *) contents;
981 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
982 size = (size + 3) & -(bfd_size_type) 4;
983 id_bits = contents + size;
984 size = asec->size - size;
985
986 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
987 bfd_h_put_32 (abfd, size, &e_note->descsz);
988 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
989 memcpy (e_note->name, "GNU", sizeof "GNU");
990
991 if (!strcmp (info->style, "md5"))
992 {
993 struct md5_ctx ctx;
994 md5_init_ctx (&ctx);
995 if (bed->s->checksum_contents (abfd,
996 (void (*) (const void *, size_t, void *))
997 &md5_process_bytes,
998 &ctx))
999 md5_finish_ctx (&ctx, id_bits);
1000 else
1001 return FALSE;
1002 }
1003 else if (!strcmp (info->style, "sha1"))
1004 {
1005 struct sha1_ctx ctx;
1006 sha1_init_ctx (&ctx);
1007 if (bed->s->checksum_contents (abfd,
1008 (void (*) (const void *, size_t, void *))
1009 &sha1_process_bytes,
1010 &ctx))
1011 sha1_finish_ctx (&ctx, id_bits);
1012 else
1013 return FALSE;
1014 }
1015 else if (!strcmp (info->style, "uuid"))
1016 {
1017 int n;
1018 int fd = open ("/dev/urandom", O_RDONLY);
1019 if (fd < 0)
1020 return FALSE;
1021 n = read (fd, id_bits, size);
1022 close (fd);
1023 if (n < (int) size)
1024 return FALSE;
1025 }
1026 else if (!strncmp (info->style, "0x", 2))
1027 {
1028 /* ID is in string form (hex). Convert to bits. */
1029 const char *id = info->style + 2;
1030 size_t n = 0;
1031 do
1032 {
1033 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1034 {
1035 id_bits[n] = read_hex (*id++) << 4;
1036 id_bits[n++] |= read_hex (*id++);
1037 }
1038 else if (*id == '-' || *id == ':')
1039 ++id;
1040 else
1041 abort (); /* Should have been validated earlier. */
1042 } while (*id != '\0');
1043 }
1044 else
1045 abort (); /* Should have been validated earlier. */
1046
1047 size = asec->size;
1048 return (bfd_seek (abfd,
1049 i_shdr->sh_offset + asec->output_offset, SEEK_SET) == 0
1050 && bfd_bwrite (contents, size, abfd) == size);
1051 }
1052
1053
1054 /* This is called after all the input files have been opened. */
1055
1056 static void
1057 gld${EMULATION_NAME}_after_open (void)
1058 {
1059 struct bfd_link_needed_list *needed, *l;
1060 struct elf_link_hash_table *htab;
1061
1062 after_open_default ();
1063
1064 htab = elf_hash_table (&link_info);
1065 if (!is_elf_hash_table (htab))
1066 return;
1067
1068 if (link_info.emit_note_gnu_build_id)
1069 {
1070 bfd *abfd;
1071 asection *s;
1072 bfd_size_type size;
1073
1074 /* Find an ELF input. */
1075 for (abfd = link_info.input_bfds;
1076 abfd != (bfd *) NULL; abfd = abfd->link_next)
1077 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1078 break;
1079
1080 if (abfd == NULL)
1081 {
1082 /* PR 10555: If there are no input files do not
1083 try to create a .note.gnu-build-id section. */
1084 free (link_info.emit_note_gnu_build_id);
1085 link_info.emit_note_gnu_build_id = NULL;
1086 }
1087 else
1088 {
1089 size = gld${EMULATION_NAME}_id_note_section_size (abfd, &link_info);
1090 if (size == 0)
1091 {
1092 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1093 free (link_info.emit_note_gnu_build_id);
1094 link_info.emit_note_gnu_build_id = NULL;
1095 }
1096 else
1097 {
1098 s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id",
1099 SEC_ALLOC | SEC_LOAD
1100 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1101 | SEC_READONLY | SEC_DATA);
1102 if (s != NULL && bfd_set_section_alignment (abfd, s, 2))
1103 {
1104 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1105 struct build_id_info *b =
1106 (struct build_id_info *) xmalloc (sizeof *b);
1107
1108 b->style = link_info.emit_note_gnu_build_id;
1109 b->sec = s;
1110 elf_section_type (s) = SHT_NOTE;
1111 s->size = size;
1112 t->after_write_object_contents
1113 = &gld${EMULATION_NAME}_write_build_id_section;
1114 t->after_write_object_contents_info = b;
1115 }
1116 else
1117 {
1118 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1119 " --build-id ignored.\n");
1120 free (link_info.emit_note_gnu_build_id);
1121 link_info.emit_note_gnu_build_id = NULL;
1122 }
1123 }
1124 }
1125 }
1126
1127 if (link_info.relocatable)
1128 return;
1129
1130 if (link_info.eh_frame_hdr
1131 && !link_info.traditional_format)
1132 {
1133 bfd *abfd, *elfbfd = NULL;
1134 bfd_boolean warn_eh_frame = FALSE;
1135 asection *s;
1136
1137 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1138 {
1139 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1140 elfbfd = abfd;
1141 if (!warn_eh_frame)
1142 {
1143 s = bfd_get_section_by_name (abfd, ".eh_frame");
1144 warn_eh_frame
1145 = (s
1146 && s->size > 8
1147 && !bfd_is_abs_section (s->output_section));
1148 }
1149 if (elfbfd && warn_eh_frame)
1150 break;
1151 }
1152 if (elfbfd)
1153 {
1154 const struct elf_backend_data *bed;
1155
1156 bed = get_elf_backend_data (elfbfd);
1157 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1158 bed->dynamic_sec_flags
1159 | SEC_READONLY);
1160 if (s != NULL
1161 && bfd_set_section_alignment (elfbfd, s, 2))
1162 {
1163 htab->eh_info.hdr_sec = s;
1164 warn_eh_frame = FALSE;
1165 }
1166 }
1167 if (warn_eh_frame)
1168 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1169 " --eh-frame-hdr ignored.\n");
1170 }
1171
1172 /* Get the list of files which appear in DT_NEEDED entries in
1173 dynamic objects included in the link (often there will be none).
1174 For each such file, we want to track down the corresponding
1175 library, and include the symbol table in the link. This is what
1176 the runtime dynamic linker will do. Tracking the files down here
1177 permits one dynamic object to include another without requiring
1178 special action by the person doing the link. Note that the
1179 needed list can actually grow while we are stepping through this
1180 loop. */
1181 if (!link_info.executable)
1182 return;
1183 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1184 for (l = needed; l != NULL; l = l->next)
1185 {
1186 struct bfd_link_needed_list *ll;
1187 struct dt_needed n, nn;
1188 int force;
1189
1190 /* If the lib that needs this one was --as-needed and wasn't
1191 found to be needed, then this lib isn't needed either. */
1192 if (l->by != NULL
1193 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1194 continue;
1195
1196 /* If we've already seen this file, skip it. */
1197 for (ll = needed; ll != l; ll = ll->next)
1198 if ((ll->by == NULL
1199 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1200 && strcmp (ll->name, l->name) == 0)
1201 break;
1202 if (ll != l)
1203 continue;
1204
1205 /* See if this file was included in the link explicitly. */
1206 global_needed = l;
1207 global_found = NULL;
1208 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1209 if (global_found != NULL
1210 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1211 & DYN_AS_NEEDED) == 0)
1212 continue;
1213
1214 n.by = l->by;
1215 n.name = l->name;
1216 nn.by = l->by;
1217 if (trace_file_tries)
1218 info_msg (_("%s needed by %B\n"), l->name, l->by);
1219
1220 /* As-needed libs specified on the command line (or linker script)
1221 take priority over libs found in search dirs. */
1222 if (global_found != NULL)
1223 {
1224 nn.name = global_found->filename;
1225 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1226 continue;
1227 }
1228
1229 /* We need to find this file and include the symbol table. We
1230 want to search for the file in the same way that the dynamic
1231 linker will search. That means that we want to use
1232 rpath_link, rpath, then the environment variable
1233 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1234 entries (native only), then the linker script LIB_SEARCH_DIRS.
1235 We do not search using the -L arguments.
1236
1237 We search twice. The first time, we skip objects which may
1238 introduce version mismatches. The second time, we force
1239 their use. See gld${EMULATION_NAME}_vercheck comment. */
1240 for (force = 0; force < 2; force++)
1241 {
1242 size_t len;
1243 search_dirs_type *search;
1244 EOF
1245 if [ "x${NATIVE}" = xyes ] ; then
1246 fragment <<EOF
1247 const char *lib_path;
1248 EOF
1249 fi
1250 if [ "x${USE_LIBPATH}" = xyes ] ; then
1251 fragment <<EOF
1252 struct bfd_link_needed_list *rp;
1253 int found;
1254 EOF
1255 fi
1256 fragment <<EOF
1257
1258 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1259 &n, force))
1260 break;
1261 EOF
1262 if [ "x${USE_LIBPATH}" = xyes ] ; then
1263 fragment <<EOF
1264 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1265 &n, force))
1266 break;
1267 EOF
1268 fi
1269 if [ "x${NATIVE}" = xyes ] ; then
1270 fragment <<EOF
1271 if (command_line.rpath_link == NULL
1272 && command_line.rpath == NULL)
1273 {
1274 lib_path = (const char *) getenv ("LD_RUN_PATH");
1275 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1276 force))
1277 break;
1278 }
1279 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1280 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1281 break;
1282 EOF
1283 fi
1284 if [ "x${USE_LIBPATH}" = xyes ] ; then
1285 fragment <<EOF
1286 found = 0;
1287 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1288 for (; !found && rp != NULL; rp = rp->next)
1289 {
1290 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1291 found = (rp->by == l->by
1292 && gld${EMULATION_NAME}_search_needed (tmpname,
1293 &n,
1294 force));
1295 free (tmpname);
1296 }
1297 if (found)
1298 break;
1299
1300 EOF
1301 fi
1302 if [ "x${USE_LIBPATH}" = xyes ] ; then
1303 case ${target} in
1304 *-*-freebsd* | *-*-dragonfly*)
1305 fragment <<EOF
1306 if (gld${EMULATION_NAME}_check_ld_elf_hints (l->name, force))
1307 break;
1308 EOF
1309 # FreeBSD
1310 ;;
1311
1312 *-*-linux-* | *-*-k*bsd*-*)
1313 # Linux
1314 fragment <<EOF
1315 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
1316 break;
1317
1318 EOF
1319 ;;
1320 esac
1321 fi
1322 fragment <<EOF
1323 len = strlen (l->name);
1324 for (search = search_head; search != NULL; search = search->next)
1325 {
1326 char *filename;
1327
1328 if (search->cmdline)
1329 continue;
1330 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1331 sprintf (filename, "%s/%s", search->name, l->name);
1332 nn.name = filename;
1333 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1334 break;
1335 free (filename);
1336 }
1337 if (search != NULL)
1338 break;
1339 EOF
1340 fragment <<EOF
1341 }
1342
1343 if (force < 2)
1344 continue;
1345
1346 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1347 l->name, l->by);
1348 }
1349 }
1350
1351 EOF
1352 fi
1353
1354 fragment <<EOF
1355
1356 /* Look through an expression for an assignment statement. */
1357
1358 static void
1359 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1360 {
1361 bfd_boolean provide = FALSE;
1362
1363 switch (exp->type.node_class)
1364 {
1365 case etree_provide:
1366 case etree_provided:
1367 provide = TRUE;
1368 /* Fall thru */
1369 case etree_assign:
1370 /* We call record_link_assignment even if the symbol is defined.
1371 This is because if it is defined by a dynamic object, we
1372 actually want to use the value defined by the linker script,
1373 not the value from the dynamic object (because we are setting
1374 symbols like etext). If the symbol is defined by a regular
1375 object, then, as it happens, calling record_link_assignment
1376 will do no harm. */
1377 if (strcmp (exp->assign.dst, ".") != 0)
1378 {
1379 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1380 &link_info,
1381 exp->assign.dst, provide,
1382 exp->assign.hidden))
1383 einfo ("%P%F: failed to record assignment to %s: %E\n",
1384 exp->assign.dst);
1385 }
1386 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1387 break;
1388
1389 case etree_binary:
1390 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1391 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1392 break;
1393
1394 case etree_trinary:
1395 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1396 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1397 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1398 break;
1399
1400 case etree_unary:
1401 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1402 break;
1403
1404 default:
1405 break;
1406 }
1407 }
1408
1409
1410 /* This is called by the before_allocation routine via
1411 lang_for_each_statement. It locates any assignment statements, and
1412 tells the ELF backend about them, in case they are assignments to
1413 symbols which are referred to by dynamic objects. */
1414
1415 static void
1416 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1417 {
1418 if (s->header.type == lang_assignment_statement_enum)
1419 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1420 }
1421
1422 EOF
1423
1424 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1425 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1426 ELF_INTERPRETER_SET_DEFAULT="
1427 if (sinterp != NULL)
1428 {
1429 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1430 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1431 }
1432
1433 "
1434 else
1435 ELF_INTERPRETER_SET_DEFAULT=
1436 fi
1437 fragment <<EOF
1438
1439 /* used by before_allocation and handle_option. */
1440 static void
1441 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1442 {
1443 if (*to == NULL)
1444 *to = xstrdup (op_arg);
1445 else
1446 {
1447 size_t to_len = strlen (*to);
1448 size_t op_arg_len = strlen (op_arg);
1449 char *buf;
1450 char *cp = *to;
1451
1452 /* First see whether OPTARG is already in the path. */
1453 do
1454 {
1455 if (strncmp (op_arg, cp, op_arg_len) == 0
1456 && (cp[op_arg_len] == 0
1457 || cp[op_arg_len] == config.rpath_separator))
1458 /* We found it. */
1459 break;
1460
1461 /* Not yet found. */
1462 cp = strchr (cp, config.rpath_separator);
1463 if (cp != NULL)
1464 ++cp;
1465 }
1466 while (cp != NULL);
1467
1468 if (cp == NULL)
1469 {
1470 buf = xmalloc (to_len + op_arg_len + 2);
1471 sprintf (buf, "%s%c%s", *to,
1472 config.rpath_separator, op_arg);
1473 free (*to);
1474 *to = buf;
1475 }
1476 }
1477 }
1478
1479 /* This is called after the sections have been attached to output
1480 sections, but before any sizes or addresses have been set. */
1481
1482 static void
1483 gld${EMULATION_NAME}_before_allocation (void)
1484 {
1485 const char *rpath;
1486 asection *sinterp;
1487 bfd *abfd;
1488
1489 if (link_info.hash->type == bfd_link_elf_hash_table)
1490 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1491
1492 /* If we are going to make any variable assignments, we need to let
1493 the ELF backend know about them in case the variables are
1494 referred to by dynamic objects. */
1495 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1496
1497 /* Let the ELF backend work out the sizes of any sections required
1498 by dynamic linking. */
1499 rpath = command_line.rpath;
1500 if (rpath == NULL)
1501 rpath = (const char *) getenv ("LD_RUN_PATH");
1502
1503 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1504 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1505 {
1506 const char *audit_libs = elf_dt_audit (abfd);
1507
1508 /* If the input bfd contains an audit entry, we need to add it as
1509 a dep audit entry. */
1510 if (audit_libs && *audit_libs != '\0')
1511 {
1512 char *cp = xstrdup (audit_libs);
1513 do
1514 {
1515 int more = 0;
1516 char *cp2 = strchr (cp, config.rpath_separator);
1517
1518 if (cp2)
1519 {
1520 *cp2 = '\0';
1521 more = 1;
1522 }
1523
1524 if (cp != NULL && *cp != '\0')
1525 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1526
1527 cp = more ? ++cp2 : NULL;
1528 }
1529 while (cp != NULL);
1530 }
1531 }
1532
1533 if (! (bfd_elf_size_dynamic_sections
1534 (link_info.output_bfd, command_line.soname, rpath,
1535 command_line.filter_shlib, audit, depaudit,
1536 (const char * const *) command_line.auxiliary_filters,
1537 &link_info, &sinterp, lang_elf_version_info)))
1538 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1539
1540 ${ELF_INTERPRETER_SET_DEFAULT}
1541 /* Let the user override the dynamic linker we are using. */
1542 if (command_line.interpreter != NULL
1543 && sinterp != NULL)
1544 {
1545 sinterp->contents = (bfd_byte *) command_line.interpreter;
1546 sinterp->size = strlen (command_line.interpreter) + 1;
1547 }
1548
1549 /* Look for any sections named .gnu.warning. As a GNU extensions,
1550 we treat such sections as containing warning messages. We print
1551 out the warning message, and then zero out the section size so
1552 that it does not get copied into the output file. */
1553
1554 {
1555 LANG_FOR_EACH_INPUT_STATEMENT (is)
1556 {
1557 asection *s;
1558 bfd_size_type sz;
1559 char *msg;
1560 bfd_boolean ret;
1561
1562 if (is->just_syms_flag)
1563 continue;
1564
1565 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1566 if (s == NULL)
1567 continue;
1568
1569 sz = s->size;
1570 msg = (char *) xmalloc ((size_t) (sz + 1));
1571 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1572 (file_ptr) 0, sz))
1573 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1574 is->the_bfd);
1575 msg[sz] = '\0';
1576 ret = link_info.callbacks->warning (&link_info, msg,
1577 (const char *) NULL,
1578 is->the_bfd, (asection *) NULL,
1579 (bfd_vma) 0);
1580 ASSERT (ret);
1581 free (msg);
1582
1583 /* Clobber the section size, so that we don't waste space
1584 copying the warning into the output file. If we've already
1585 sized the output section, adjust its size. The adjustment
1586 is on rawsize because targets that size sections early will
1587 have called lang_reset_memory_regions after sizing. */
1588 if (s->output_section != NULL
1589 && s->output_section->rawsize >= s->size)
1590 s->output_section->rawsize -= s->size;
1591
1592 s->size = 0;
1593
1594 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1595 warning section don't get copied to the output. */
1596 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1597 }
1598 }
1599
1600 before_allocation_default ();
1601
1602 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1603 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1604 }
1605
1606 EOF
1607 fi
1608
1609 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1610 fragment <<EOF
1611
1612 /* Try to open a dynamic archive. This is where we know that ELF
1613 dynamic libraries have an extension of .so (or .sl on oddball systems
1614 like hpux). */
1615
1616 static bfd_boolean
1617 gld${EMULATION_NAME}_open_dynamic_archive
1618 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1619 {
1620 const char *filename;
1621 char *string;
1622
1623 if (! entry->maybe_archive)
1624 return FALSE;
1625
1626 filename = entry->filename;
1627
1628 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1629 is defined, but it does not seem worth the headache to optimize
1630 away those two bytes of space. */
1631 string = (char *) xmalloc (strlen (search->name)
1632 + strlen (filename)
1633 + strlen (arch)
1634 #ifdef EXTRA_SHLIB_EXTENSION
1635 + strlen (EXTRA_SHLIB_EXTENSION)
1636 #endif
1637 + sizeof "/lib.so");
1638
1639 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1640
1641 #ifdef EXTRA_SHLIB_EXTENSION
1642 /* Try the .so extension first. If that fails build a new filename
1643 using EXTRA_SHLIB_EXTENSION. */
1644 if (! ldfile_try_open_bfd (string, entry))
1645 {
1646 sprintf (string, "%s/lib%s%s%s", search->name,
1647 filename, arch, EXTRA_SHLIB_EXTENSION);
1648 #endif
1649
1650 if (! ldfile_try_open_bfd (string, entry))
1651 {
1652 free (string);
1653 return FALSE;
1654 }
1655 #ifdef EXTRA_SHLIB_EXTENSION
1656 }
1657 #endif
1658
1659 entry->filename = string;
1660
1661 /* We have found a dynamic object to include in the link. The ELF
1662 backend linker will create a DT_NEEDED entry in the .dynamic
1663 section naming this file. If this file includes a DT_SONAME
1664 entry, it will be used. Otherwise, the ELF linker will just use
1665 the name of the file. For an archive found by searching, like
1666 this one, the DT_NEEDED entry should consist of just the name of
1667 the file, without the path information used to find it. Note
1668 that we only need to do this if we have a dynamic object; an
1669 archive will never be referenced by a DT_NEEDED entry.
1670
1671 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1672 very pretty. I haven't been able to think of anything that is
1673 pretty, though. */
1674 if (bfd_check_format (entry->the_bfd, bfd_object)
1675 && (entry->the_bfd->flags & DYNAMIC) != 0)
1676 {
1677 ASSERT (entry->maybe_archive && entry->search_dirs_flag);
1678
1679 /* Rather than duplicating the logic above. Just use the
1680 filename we recorded earlier. */
1681
1682 filename = lbasename (entry->filename);
1683 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1684 }
1685
1686 return TRUE;
1687 }
1688
1689 EOF
1690 fi
1691
1692 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1693 fragment <<EOF
1694
1695 /* A variant of lang_output_section_find used by place_orphan. */
1696
1697 static lang_output_section_statement_type *
1698 output_rel_find (asection *sec, int isdyn)
1699 {
1700 lang_output_section_statement_type *lookup;
1701 lang_output_section_statement_type *last = NULL;
1702 lang_output_section_statement_type *last_alloc = NULL;
1703 lang_output_section_statement_type *last_ro_alloc = NULL;
1704 lang_output_section_statement_type *last_rel = NULL;
1705 lang_output_section_statement_type *last_rel_alloc = NULL;
1706 int rela = sec->name[4] == 'a';
1707
1708 for (lookup = &lang_output_section_statement.head->output_section_statement;
1709 lookup != NULL;
1710 lookup = lookup->next)
1711 {
1712 if (lookup->constraint >= 0
1713 && CONST_STRNEQ (lookup->name, ".rel"))
1714 {
1715 int lookrela = lookup->name[4] == 'a';
1716
1717 /* .rel.dyn must come before all other reloc sections, to suit
1718 GNU ld.so. */
1719 if (isdyn)
1720 break;
1721
1722 /* Don't place after .rel.plt as doing so results in wrong
1723 dynamic tags. */
1724 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1725 break;
1726
1727 if (rela == lookrela || last_rel == NULL)
1728 last_rel = lookup;
1729 if ((rela == lookrela || last_rel_alloc == NULL)
1730 && lookup->bfd_section != NULL
1731 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1732 last_rel_alloc = lookup;
1733 }
1734
1735 last = lookup;
1736 if (lookup->bfd_section != NULL
1737 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1738 {
1739 last_alloc = lookup;
1740 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1741 last_ro_alloc = lookup;
1742 }
1743 }
1744
1745 if (last_rel_alloc)
1746 return last_rel_alloc;
1747
1748 if (last_rel)
1749 return last_rel;
1750
1751 if (last_ro_alloc)
1752 return last_ro_alloc;
1753
1754 if (last_alloc)
1755 return last_alloc;
1756
1757 return last;
1758 }
1759
1760 /* Place an orphan section. We use this to put random SHF_ALLOC
1761 sections in the right segment. */
1762
1763 static lang_output_section_statement_type *
1764 gld${EMULATION_NAME}_place_orphan (asection *s,
1765 const char *secname,
1766 int constraint)
1767 {
1768 static struct orphan_save hold[] =
1769 {
1770 { ".text",
1771 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1772 0, 0, 0, 0 },
1773 { ".rodata",
1774 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1775 0, 0, 0, 0 },
1776 { ".data",
1777 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1778 0, 0, 0, 0 },
1779 { ".bss",
1780 SEC_ALLOC,
1781 0, 0, 0, 0 },
1782 { 0,
1783 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1784 0, 0, 0, 0 },
1785 { ".interp",
1786 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1787 0, 0, 0, 0 },
1788 { ".sdata",
1789 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1790 0, 0, 0, 0 },
1791 { 0,
1792 SEC_HAS_CONTENTS,
1793 0, 0, 0, 0 },
1794 };
1795 enum orphan_save_index
1796 {
1797 orphan_text = 0,
1798 orphan_rodata,
1799 orphan_data,
1800 orphan_bss,
1801 orphan_rel,
1802 orphan_interp,
1803 orphan_sdata,
1804 orphan_nonalloc
1805 };
1806 static int orphan_init_done = 0;
1807 struct orphan_save *place;
1808 lang_output_section_statement_type *after;
1809 lang_output_section_statement_type *os;
1810 lang_output_section_statement_type *match_by_name = NULL;
1811 int isdyn = 0;
1812 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1813 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1814
1815 if (! link_info.relocatable
1816 && link_info.combreloc
1817 && (s->flags & SEC_ALLOC))
1818 {
1819 if (iself)
1820 switch (sh_type)
1821 {
1822 case SHT_RELA:
1823 secname = ".rela.dyn";
1824 isdyn = 1;
1825 break;
1826 case SHT_REL:
1827 secname = ".rel.dyn";
1828 isdyn = 1;
1829 break;
1830 default:
1831 break;
1832 }
1833 else if (CONST_STRNEQ (secname, ".rel"))
1834 {
1835 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1836 isdyn = 1;
1837 }
1838 }
1839
1840 /* Look through the script to see where to place this section. */
1841 if (constraint == 0)
1842 for (os = lang_output_section_find (secname);
1843 os != NULL;
1844 os = next_matching_output_section_statement (os, 0))
1845 {
1846 /* If we don't match an existing output section, tell
1847 lang_insert_orphan to create a new output section. */
1848 constraint = SPECIAL;
1849
1850 if (os->bfd_section != NULL
1851 && (os->bfd_section->flags == 0
1852 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1853 os->bfd_section,
1854 s->owner, s)
1855 && ((s->flags ^ os->bfd_section->flags)
1856 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1857 {
1858 /* We already have an output section statement with this
1859 name, and its bfd section has compatible flags.
1860 If the section already exists but does not have any flags
1861 set, then it has been created by the linker, probably as a
1862 result of a --section-start command line switch. */
1863 lang_add_section (&os->children, s, os);
1864 return os;
1865 }
1866
1867 /* Save unused output sections in case we can match them
1868 against orphans later. */
1869 if (os->bfd_section == NULL)
1870 match_by_name = os;
1871 }
1872
1873 /* If we didn't match an active output section, see if we matched an
1874 unused one and use that. */
1875 if (match_by_name)
1876 {
1877 lang_add_section (&match_by_name->children, s, match_by_name);
1878 return match_by_name;
1879 }
1880
1881 if (!orphan_init_done)
1882 {
1883 lang_output_section_statement_type *lookup;
1884 struct orphan_save *ho;
1885
1886 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1887 if (ho->name != NULL)
1888 {
1889 ho->os = lang_output_section_find (ho->name);
1890 if (ho->os != NULL && ho->os->flags == 0)
1891 ho->os->flags = ho->flags;
1892 }
1893 lookup = hold[orphan_bss].os;
1894 if (lookup == NULL)
1895 lookup = &lang_output_section_statement.head->output_section_statement;
1896 for (; lookup != NULL; lookup = lookup->next)
1897 if ((lookup->bfd_section != NULL
1898 && (lookup->bfd_section->flags & SEC_DEBUGGING) != 0)
1899 || strcmp (lookup->name, ".comment") == 0)
1900 break;
1901 hold[orphan_nonalloc].os = lookup ? lookup->prev : NULL;
1902 hold[orphan_nonalloc].name = ".comment";
1903 orphan_init_done = 1;
1904 }
1905
1906 /* If this is a final link, then always put .gnu.warning.SYMBOL
1907 sections into the .text section to get them out of the way. */
1908 if (link_info.executable
1909 && ! link_info.relocatable
1910 && CONST_STRNEQ (s->name, ".gnu.warning.")
1911 && hold[orphan_text].os != NULL)
1912 {
1913 os = hold[orphan_text].os;
1914 lang_add_section (&os->children, s, os);
1915 return os;
1916 }
1917
1918 /* Decide which segment the section should go in based on the
1919 section name and section flags. We put loadable .note sections
1920 right after the .interp section, so that the PT_NOTE segment is
1921 stored right after the program headers where the OS can read it
1922 in the first page. */
1923
1924 place = NULL;
1925 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1926 place = &hold[orphan_nonalloc];
1927 else if ((s->flags & SEC_ALLOC) == 0)
1928 ;
1929 else if ((s->flags & SEC_LOAD) != 0
1930 && ((iself && sh_type == SHT_NOTE)
1931 || (!iself && CONST_STRNEQ (secname, ".note"))))
1932 place = &hold[orphan_interp];
1933 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
1934 place = &hold[orphan_bss];
1935 else if ((s->flags & SEC_SMALL_DATA) != 0)
1936 place = &hold[orphan_sdata];
1937 else if ((s->flags & SEC_READONLY) == 0)
1938 place = &hold[orphan_data];
1939 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1940 || (!iself && CONST_STRNEQ (secname, ".rel")))
1941 && (s->flags & SEC_LOAD) != 0)
1942 place = &hold[orphan_rel];
1943 else if ((s->flags & SEC_CODE) == 0)
1944 place = &hold[orphan_rodata];
1945 else
1946 place = &hold[orphan_text];
1947
1948 after = NULL;
1949 if (place != NULL)
1950 {
1951 if (place->os == NULL)
1952 {
1953 if (place->name != NULL)
1954 place->os = lang_output_section_find (place->name);
1955 else
1956 place->os = output_rel_find (s, isdyn);
1957 }
1958 after = place->os;
1959 if (after == NULL)
1960 after = lang_output_section_find_by_flags
1961 (s, &place->os, _bfd_elf_match_sections_by_type);
1962 if (after == NULL)
1963 /* *ABS* is always the first output section statement. */
1964 after = &lang_output_section_statement.head->output_section_statement;
1965 }
1966
1967 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1968 }
1969 EOF
1970 fi
1971
1972 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1973 fragment <<EOF
1974
1975 static void
1976 gld${EMULATION_NAME}_after_allocation (void)
1977 {
1978 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1979 &link_info);
1980 gld${EMULATION_NAME}_map_segments (need_layout);
1981 }
1982 EOF
1983 fi
1984
1985 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1986 fragment <<EOF
1987
1988 static char *
1989 gld${EMULATION_NAME}_get_script (int *isfile)
1990 EOF
1991
1992 if test -n "$COMPILE_IN"
1993 then
1994 # Scripts compiled in.
1995
1996 # sed commands to quote an ld script as a C string.
1997 sc="-f stringify.sed"
1998
1999 fragment <<EOF
2000 {
2001 *isfile = 0;
2002
2003 if (link_info.relocatable && config.build_constructors)
2004 return
2005 EOF
2006 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2007 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
2008 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2009 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2010 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2011 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2012 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2013 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2014 fi
2015 if test -n "$GENERATE_PIE_SCRIPT" ; then
2016 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2017 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${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}.xdw >> e${EMULATION_NAME}.c
2021 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2022 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2023 fi
2024 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2025 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2026 fi
2027 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2028 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2029 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2030 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2031 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2032 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2033 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2034 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2035 fi
2036 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2037 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2038 fi
2039 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2040 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2041 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2042 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2043 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2044 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2045 fi
2046 echo ' ; else return' >> e${EMULATION_NAME}.c
2047 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2048 echo '; }' >> e${EMULATION_NAME}.c
2049
2050 else
2051 # Scripts read from the filesystem.
2052
2053 fragment <<EOF
2054 {
2055 *isfile = 1;
2056
2057 if (link_info.relocatable && config.build_constructors)
2058 return "ldscripts/${EMULATION_NAME}.xu";
2059 else if (link_info.relocatable)
2060 return "ldscripts/${EMULATION_NAME}.xr";
2061 else if (!config.text_read_only)
2062 return "ldscripts/${EMULATION_NAME}.xbn";
2063 EOF
2064 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2065 else
2066 fragment <<EOF
2067 else if (!config.magic_demand_paged)
2068 return "ldscripts/${EMULATION_NAME}.xn";
2069 EOF
2070 fi
2071 if test -n "$GENERATE_PIE_SCRIPT" ; then
2072 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2073 fragment <<EOF
2074 else if (link_info.pie && link_info.combreloc
2075 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2076 return "ldscripts/${EMULATION_NAME}.xdw";
2077 else if (link_info.pie && link_info.combreloc)
2078 return "ldscripts/${EMULATION_NAME}.xdc";
2079 EOF
2080 fi
2081 fragment <<EOF
2082 else if (link_info.pie)
2083 return "ldscripts/${EMULATION_NAME}.xd";
2084 EOF
2085 fi
2086 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2087 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2088 fragment <<EOF
2089 else if (link_info.shared && link_info.combreloc
2090 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2091 return "ldscripts/${EMULATION_NAME}.xsw";
2092 else if (link_info.shared && link_info.combreloc)
2093 return "ldscripts/${EMULATION_NAME}.xsc";
2094 EOF
2095 fi
2096 fragment <<EOF
2097 else if (link_info.shared)
2098 return "ldscripts/${EMULATION_NAME}.xs";
2099 EOF
2100 fi
2101 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2102 fragment <<EOF
2103 else if (link_info.combreloc && link_info.relro
2104 && (link_info.flags & DF_BIND_NOW))
2105 return "ldscripts/${EMULATION_NAME}.xw";
2106 else if (link_info.combreloc)
2107 return "ldscripts/${EMULATION_NAME}.xc";
2108 EOF
2109 fi
2110 fragment <<EOF
2111 else
2112 return "ldscripts/${EMULATION_NAME}.x";
2113 }
2114
2115 EOF
2116 fi
2117 fi
2118
2119 if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2120
2121 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2122 fragment <<EOF
2123 $PARSE_AND_LIST_PROLOGUE
2124 EOF
2125 fi
2126
2127 fragment <<EOF
2128
2129 #define OPTION_DISABLE_NEW_DTAGS (400)
2130 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2131 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2132 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2133 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2134 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2135 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2136 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2137
2138 static void
2139 gld${EMULATION_NAME}_add_options
2140 (int ns, char **shortopts, int nl, struct option **longopts,
2141 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2142 {
2143 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2144 static const struct option xtra_long[] = {
2145 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2146 {"audit", required_argument, NULL, OPTION_AUDIT},
2147 {"depaudit", required_argument, NULL, 'P'},
2148 EOF
2149
2150 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2151 fragment <<EOF
2152 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2153 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2154 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2155 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2156 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2157 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2158 EOF
2159 fi
2160
2161 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2162 fragment <<EOF
2163 $PARSE_AND_LIST_LONGOPTS
2164 EOF
2165 fi
2166
2167 fragment <<EOF
2168 {NULL, no_argument, NULL, 0}
2169 };
2170
2171 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2172 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2173 *longopts = (struct option *)
2174 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2175 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2176 }
2177
2178 #define DEFAULT_BUILD_ID_STYLE "sha1"
2179
2180 static bfd_boolean
2181 gld${EMULATION_NAME}_handle_option (int optc)
2182 {
2183 switch (optc)
2184 {
2185 default:
2186 return FALSE;
2187
2188 case OPTION_BUILD_ID:
2189 if (link_info.emit_note_gnu_build_id != NULL)
2190 {
2191 free (link_info.emit_note_gnu_build_id);
2192 link_info.emit_note_gnu_build_id = NULL;
2193 }
2194 if (optarg == NULL)
2195 optarg = DEFAULT_BUILD_ID_STYLE;
2196 if (strcmp (optarg, "none"))
2197 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2198 break;
2199 case OPTION_AUDIT:
2200 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2201 break;
2202 case 'P':
2203 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2204 break;
2205
2206 EOF
2207
2208 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2209 fragment <<EOF
2210 case OPTION_DISABLE_NEW_DTAGS:
2211 link_info.new_dtags = FALSE;
2212 break;
2213
2214 case OPTION_ENABLE_NEW_DTAGS:
2215 link_info.new_dtags = TRUE;
2216 break;
2217
2218 case OPTION_EH_FRAME_HDR:
2219 link_info.eh_frame_hdr = TRUE;
2220 break;
2221
2222 case OPTION_GROUP:
2223 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2224 /* Groups must be self-contained. */
2225 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2226 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2227 break;
2228
2229 case OPTION_EXCLUDE_LIBS:
2230 add_excluded_libs (optarg);
2231 break;
2232
2233 case OPTION_HASH_STYLE:
2234 link_info.emit_hash = FALSE;
2235 link_info.emit_gnu_hash = FALSE;
2236 if (strcmp (optarg, "sysv") == 0)
2237 link_info.emit_hash = TRUE;
2238 else if (strcmp (optarg, "gnu") == 0)
2239 link_info.emit_gnu_hash = TRUE;
2240 else if (strcmp (optarg, "both") == 0)
2241 {
2242 link_info.emit_hash = TRUE;
2243 link_info.emit_gnu_hash = TRUE;
2244 }
2245 else
2246 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2247 break;
2248
2249 case 'z':
2250 if (strcmp (optarg, "initfirst") == 0)
2251 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2252 else if (strcmp (optarg, "interpose") == 0)
2253 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2254 else if (strcmp (optarg, "loadfltr") == 0)
2255 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2256 else if (strcmp (optarg, "nodefaultlib") == 0)
2257 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2258 else if (strcmp (optarg, "nodelete") == 0)
2259 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2260 else if (strcmp (optarg, "nodlopen") == 0)
2261 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2262 else if (strcmp (optarg, "nodump") == 0)
2263 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2264 else if (strcmp (optarg, "now") == 0)
2265 {
2266 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2267 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2268 }
2269 else if (strcmp (optarg, "lazy") == 0)
2270 {
2271 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2272 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2273 }
2274 else if (strcmp (optarg, "origin") == 0)
2275 {
2276 link_info.flags |= (bfd_vma) DF_ORIGIN;
2277 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2278 }
2279 else if (strcmp (optarg, "defs") == 0)
2280 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2281 else if (strcmp (optarg, "muldefs") == 0)
2282 link_info.allow_multiple_definition = TRUE;
2283 else if (strcmp (optarg, "combreloc") == 0)
2284 link_info.combreloc = TRUE;
2285 else if (strcmp (optarg, "nocombreloc") == 0)
2286 link_info.combreloc = FALSE;
2287 else if (strcmp (optarg, "nocopyreloc") == 0)
2288 link_info.nocopyreloc = TRUE;
2289 else if (strcmp (optarg, "execstack") == 0)
2290 {
2291 link_info.execstack = TRUE;
2292 link_info.noexecstack = FALSE;
2293 }
2294 else if (strcmp (optarg, "noexecstack") == 0)
2295 {
2296 link_info.noexecstack = TRUE;
2297 link_info.execstack = FALSE;
2298 }
2299 EOF
2300
2301 if test -n "$COMMONPAGESIZE"; then
2302 fragment <<EOF
2303 else if (strcmp (optarg, "relro") == 0)
2304 link_info.relro = TRUE;
2305 else if (strcmp (optarg, "norelro") == 0)
2306 link_info.relro = FALSE;
2307 EOF
2308 fi
2309
2310 fragment <<EOF
2311 else if (CONST_STRNEQ (optarg, "max-page-size="))
2312 {
2313 char *end;
2314
2315 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2316 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2317 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2318 optarg + 14);
2319 }
2320 else if (CONST_STRNEQ (optarg, "common-page-size="))
2321 {
2322 char *end;
2323 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2324 if (*end
2325 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2326 einfo (_("%P%F: invalid common page size \`%s'\n"),
2327 optarg + 17);
2328 }
2329 /* What about the other Solaris -z options? FIXME. */
2330 break;
2331 EOF
2332 fi
2333
2334 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2335 fragment <<EOF
2336 $PARSE_AND_LIST_ARGS_CASES
2337 EOF
2338 fi
2339
2340 fragment <<EOF
2341 }
2342
2343 return TRUE;
2344 }
2345
2346 EOF
2347
2348 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2349 fragment <<EOF
2350
2351 static void
2352 gld${EMULATION_NAME}_list_options (FILE * file)
2353 {
2354 fprintf (file, _("\
2355 --build-id[=STYLE] Generate build ID note\n"));
2356 fprintf (file, _("\
2357 --audit=AUDITLIB Specify a library to use for auditing\n"));
2358 fprintf (file, _("\
2359 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2360 Specify a library to use for auditing dependencies\n"));
2361 EOF
2362
2363 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2364 fragment <<EOF
2365 fprintf (file, _("\
2366 -Bgroup Selects group name lookup rules for DSO\n"));
2367 fprintf (file, _("\
2368 --disable-new-dtags Disable new dynamic tags\n"));
2369 fprintf (file, _("\
2370 --enable-new-dtags Enable new dynamic tags\n"));
2371 fprintf (file, _("\
2372 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2373 fprintf (file, _("\
2374 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2375 fprintf (file, _("\
2376 -z combreloc Merge dynamic relocs into one section and sort\n"));
2377 fprintf (file, _("\
2378 -z defs Report unresolved symbols in object files.\n"));
2379 fprintf (file, _("\
2380 -z execstack Mark executable as requiring executable stack\n"));
2381 fprintf (file, _("\
2382 -z initfirst Mark DSO to be initialized first at runtime\n"));
2383 fprintf (file, _("\
2384 -z interpose Mark object to interpose all DSOs but executable\n"));
2385 fprintf (file, _("\
2386 -z lazy Mark object lazy runtime binding (default)\n"));
2387 fprintf (file, _("\
2388 -z loadfltr Mark object requiring immediate process\n"));
2389 fprintf (file, _("\
2390 -z muldefs Allow multiple definitions\n"));
2391 fprintf (file, _("\
2392 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2393 fprintf (file, _("\
2394 -z nocopyreloc Don't create copy relocs\n"));
2395 fprintf (file, _("\
2396 -z nodefaultlib Mark object not to use default search paths\n"));
2397 fprintf (file, _("\
2398 -z nodelete Mark DSO non-deletable at runtime\n"));
2399 fprintf (file, _("\
2400 -z nodlopen Mark DSO not available to dlopen\n"));
2401 fprintf (file, _("\
2402 -z nodump Mark DSO not available to dldump\n"));
2403 fprintf (file, _("\
2404 -z noexecstack Mark executable as not requiring executable stack\n"));
2405 EOF
2406
2407 if test -n "$COMMONPAGESIZE"; then
2408 fragment <<EOF
2409 fprintf (file, _("\
2410 -z norelro Don't create RELRO program header\n"));
2411 EOF
2412 fi
2413
2414 fragment <<EOF
2415 fprintf (file, _("\
2416 -z now Mark object non-lazy runtime binding\n"));
2417 fprintf (file, _("\
2418 -z origin Mark object requiring immediate \$ORIGIN\n\
2419 processing at runtime\n"));
2420 EOF
2421
2422 if test -n "$COMMONPAGESIZE"; then
2423 fragment <<EOF
2424 fprintf (file, _("\
2425 -z relro Create RELRO program header\n"));
2426 EOF
2427 fi
2428
2429 fragment <<EOF
2430 fprintf (file, _("\
2431 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2432 fprintf (file, _("\
2433 -z common-page-size=SIZE Set common page size to SIZE\n"));
2434 fprintf (file, _("\
2435 -z KEYWORD Ignored for Solaris compatibility\n"));
2436 EOF
2437 fi
2438
2439 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2440 fragment <<EOF
2441 $PARSE_AND_LIST_OPTIONS
2442 EOF
2443 fi
2444
2445 fragment <<EOF
2446 }
2447 EOF
2448
2449 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2450 fragment <<EOF
2451 $PARSE_AND_LIST_EPILOGUE
2452 EOF
2453 fi
2454 fi
2455 else
2456 fragment <<EOF
2457 #define gld${EMULATION_NAME}_add_options NULL
2458 #define gld${EMULATION_NAME}_handle_option NULL
2459 EOF
2460 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2461 fragment <<EOF
2462 #define gld${EMULATION_NAME}_list_options NULL
2463 EOF
2464 fi
2465 fi
2466
2467 fragment <<EOF
2468
2469 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2470 {
2471 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2472 ${LDEMUL_SYSLIB-syslib_default},
2473 ${LDEMUL_HLL-hll_default},
2474 ${LDEMUL_AFTER_PARSE-after_parse_default},
2475 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2476 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2477 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2478 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2479 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2480 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2481 "${EMULATION_NAME}",
2482 "${OUTPUT_FORMAT}",
2483 ${LDEMUL_FINISH-finish_default},
2484 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2485 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2486 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2487 ${LDEMUL_SET_SYMBOLS-NULL},
2488 ${LDEMUL_PARSE_ARGS-NULL},
2489 gld${EMULATION_NAME}_add_options,
2490 gld${EMULATION_NAME}_handle_option,
2491 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2492 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2493 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2494 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2495 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2496 };
2497 EOF
This page took 0.082296 seconds and 5 git commands to generate.