Fix copy'n'paste-o.
[deliverable/binutils-gdb.git] / ld / emultempl / elf32.em
1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 # This file is now misnamed, because it supports both 32 bit and 64 bit
4 # ELF emulations.
5 test -z "${ELFSIZE}" && ELFSIZE=32
6 if [ -z "$MACHINE" ]; then
7 OUTPUT_ARCH=${ARCH}
8 else
9 OUTPUT_ARCH=${ARCH}:${MACHINE}
10 fi
11 fragment <<EOF
12 /* This file is is generated by a shell script. DO NOT EDIT! */
13
14 /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
17 Free Software Foundation, Inc.
18 Written by Steve Chamberlain <sac@cygnus.com>
19 ELF support by Ian Lance Taylor <ian@cygnus.com>
20
21 This file is part of the GNU Binutils.
22
23 This program is free software; you can redistribute it and/or modify
24 it under the terms of the GNU General Public License as published by
25 the Free Software Foundation; either version 3 of the License, or
26 (at your option) any later version.
27
28 This program is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
32
33 You should have received a copy of the GNU General Public License
34 along with this program; if not, write to the Free Software
35 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
36 MA 02110-1301, USA. */
37
38 #define TARGET_IS_${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 char *name, int force)
573 {
574 static bfd_boolean initialized;
575 static char *ld_elf_hints;
576 struct dt_needed needed;
577
578 if (!initialized)
579 {
580 FILE *f;
581 char *tmppath;
582
583 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
584 f = fopen (tmppath, FOPEN_RB);
585 free (tmppath);
586 if (f != NULL)
587 {
588 struct elfhints_hdr hdr;
589
590 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
591 && hdr.magic == ELFHINTS_MAGIC
592 && hdr.version == 1)
593 {
594 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
595 {
596 char *b;
597
598 b = xmalloc (hdr.dirlistlen + 1);
599 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
600 hdr.dirlistlen + 1)
601 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
602
603 free (b);
604 }
605 }
606 fclose (f);
607 }
608
609 initialized = TRUE;
610 }
611
612 if (ld_elf_hints == NULL)
613 return FALSE;
614
615 needed.by = NULL;
616 needed.name = name;
617 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,
618 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${EMULATION_NAME}_check_ld_so_conf (const char *name, int force)
791 {
792 static bfd_boolean initialized;
793 static char *ld_so_conf;
794 struct dt_needed needed;
795
796 if (! initialized)
797 {
798 char *tmppath;
799 struct gld${EMULATION_NAME}_ld_so_conf info;
800
801 info.path = NULL;
802 info.len = info.alloc = 0;
803 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
804 (const char *) NULL);
805 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
806 {
807 free (tmppath);
808 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
809 (const char *) NULL);
810 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
811 }
812 free (tmppath);
813
814 if (info.path)
815 {
816 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
817 free (info.path);
818 ld_so_conf = d;
819 }
820 initialized = TRUE;
821 }
822
823 if (ld_so_conf == NULL)
824 return FALSE;
825
826
827 needed.by = NULL;
828 needed.name = name;
829 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
830 }
831
832 EOF
833 # Linux
834 ;;
835 esac
836 fi
837 fragment <<EOF
838
839 /* See if an input file matches a DT_NEEDED entry by name. */
840
841 static void
842 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
843 {
844 const char *soname;
845
846 /* Stop looking if we've found a loaded lib. */
847 if (global_found != NULL
848 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
849 & DYN_AS_NEEDED) == 0)
850 return;
851
852 if (s->filename == NULL || s->the_bfd == NULL)
853 return;
854
855 /* Don't look for a second non-loaded as-needed lib. */
856 if (global_found != NULL
857 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
858 return;
859
860 if (filename_cmp (s->filename, global_needed->name) == 0)
861 {
862 global_found = s;
863 return;
864 }
865
866 if (s->flags.search_dirs)
867 {
868 const char *f = strrchr (s->filename, '/');
869 if (f != NULL
870 && filename_cmp (f + 1, global_needed->name) == 0)
871 {
872 global_found = s;
873 return;
874 }
875 }
876
877 soname = bfd_elf_get_dt_soname (s->the_bfd);
878 if (soname != NULL
879 && filename_cmp (soname, global_needed->name) == 0)
880 {
881 global_found = s;
882 return;
883 }
884 }
885
886 EOF
887
888 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
889 fragment <<EOF
890
891 static bfd_size_type
892 gld${EMULATION_NAME}_id_note_section_size (bfd *abfd,
893 struct bfd_link_info *linfo)
894 {
895 const char *style = linfo->emit_note_gnu_build_id;
896 bfd_size_type size;
897
898 abfd = abfd;
899
900 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
901 size = (size + 3) & -(bfd_size_type) 4;
902
903 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
904 size += 128 / 8;
905 else if (!strcmp (style, "sha1"))
906 size += 160 / 8;
907 else if (!strncmp (style, "0x", 2))
908 {
909 /* ID is in string form (hex). Convert to bits. */
910 const char *id = style + 2;
911 do
912 {
913 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
914 {
915 ++size;
916 id += 2;
917 }
918 else if (*id == '-' || *id == ':')
919 ++id;
920 else
921 {
922 size = 0;
923 break;
924 }
925 } while (*id != '\0');
926 }
927 else
928 size = 0;
929
930 return size;
931 }
932
933 static unsigned char
934 read_hex (const char xdigit)
935 {
936 if (ISDIGIT (xdigit))
937 return xdigit - '0';
938 if (ISUPPER (xdigit))
939 return xdigit - 'A' + 0xa;
940 if (ISLOWER (xdigit))
941 return xdigit - 'a' + 0xa;
942 abort ();
943 return 0;
944 }
945
946 struct build_id_info
947 {
948 const char *style;
949 asection *sec;
950 };
951
952 static bfd_boolean
953 gld${EMULATION_NAME}_write_build_id_section (bfd *abfd)
954 {
955 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
956 struct build_id_info *info = (struct build_id_info *)
957 elf_tdata (abfd)->after_write_object_contents_info;
958 asection *asec;
959 Elf_Internal_Shdr *i_shdr;
960 unsigned char *contents, *id_bits;
961 bfd_size_type size;
962 Elf_External_Note *e_note;
963
964 asec = info->sec;
965 if (bfd_is_abs_section (asec->output_section))
966 {
967 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
968 " --build-id ignored.\n"));
969 return TRUE;
970 }
971 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
972
973 if (i_shdr->contents == NULL)
974 {
975 if (asec->contents == NULL)
976 asec->contents = (unsigned char *) xmalloc (asec->size);
977 contents = asec->contents;
978 }
979 else
980 contents = i_shdr->contents + asec->output_offset;
981
982 e_note = (Elf_External_Note *) contents;
983 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
984 size = (size + 3) & -(bfd_size_type) 4;
985 id_bits = contents + size;
986 size = asec->size - size;
987
988 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
989 bfd_h_put_32 (abfd, size, &e_note->descsz);
990 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
991 memcpy (e_note->name, "GNU", sizeof "GNU");
992
993 if (!strcmp (info->style, "md5"))
994 {
995 struct md5_ctx ctx;
996 md5_init_ctx (&ctx);
997 if (bed->s->checksum_contents (abfd,
998 (void (*) (const void *, size_t, void *))
999 &md5_process_bytes,
1000 &ctx))
1001 md5_finish_ctx (&ctx, id_bits);
1002 else
1003 return FALSE;
1004 }
1005 else if (!strcmp (info->style, "sha1"))
1006 {
1007 struct sha1_ctx ctx;
1008 sha1_init_ctx (&ctx);
1009 if (bed->s->checksum_contents (abfd,
1010 (void (*) (const void *, size_t, void *))
1011 &sha1_process_bytes,
1012 &ctx))
1013 sha1_finish_ctx (&ctx, id_bits);
1014 else
1015 return FALSE;
1016 }
1017 else if (!strcmp (info->style, "uuid"))
1018 {
1019 int n;
1020 int fd = open ("/dev/urandom", O_RDONLY);
1021 if (fd < 0)
1022 return FALSE;
1023 n = read (fd, id_bits, size);
1024 close (fd);
1025 if (n < (int) size)
1026 return FALSE;
1027 }
1028 else if (!strncmp (info->style, "0x", 2))
1029 {
1030 /* ID is in string form (hex). Convert to bits. */
1031 const char *id = info->style + 2;
1032 size_t n = 0;
1033 do
1034 {
1035 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1036 {
1037 id_bits[n] = read_hex (*id++) << 4;
1038 id_bits[n++] |= read_hex (*id++);
1039 }
1040 else if (*id == '-' || *id == ':')
1041 ++id;
1042 else
1043 abort (); /* Should have been validated earlier. */
1044 } while (*id != '\0');
1045 }
1046 else
1047 abort (); /* Should have been validated earlier. */
1048
1049 size = asec->size;
1050 return (bfd_seek (abfd,
1051 i_shdr->sh_offset + asec->output_offset, SEEK_SET) == 0
1052 && bfd_bwrite (contents, size, abfd) == size);
1053 }
1054
1055
1056 /* This is called after all the input files have been opened. */
1057
1058 static void
1059 gld${EMULATION_NAME}_after_open (void)
1060 {
1061 struct bfd_link_needed_list *needed, *l;
1062 struct elf_link_hash_table *htab;
1063
1064 after_open_default ();
1065
1066 htab = elf_hash_table (&link_info);
1067 if (!is_elf_hash_table (htab))
1068 return;
1069
1070 if (link_info.emit_note_gnu_build_id)
1071 {
1072 bfd *abfd;
1073 asection *s;
1074 bfd_size_type size;
1075
1076 /* Find an ELF input. */
1077 for (abfd = link_info.input_bfds;
1078 abfd != (bfd *) NULL; abfd = abfd->link_next)
1079 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1080 break;
1081
1082 if (abfd == NULL)
1083 {
1084 /* PR 10555: If there are no input files do not
1085 try to create a .note.gnu-build-id section. */
1086 free (link_info.emit_note_gnu_build_id);
1087 link_info.emit_note_gnu_build_id = NULL;
1088 }
1089 else
1090 {
1091 size = gld${EMULATION_NAME}_id_note_section_size (abfd, &link_info);
1092 if (size == 0)
1093 {
1094 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1095 free (link_info.emit_note_gnu_build_id);
1096 link_info.emit_note_gnu_build_id = NULL;
1097 }
1098 else
1099 {
1100 s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id",
1101 SEC_ALLOC | SEC_LOAD
1102 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1103 | SEC_READONLY | SEC_DATA);
1104 if (s != NULL && bfd_set_section_alignment (abfd, s, 2))
1105 {
1106 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1107 struct build_id_info *b =
1108 (struct build_id_info *) xmalloc (sizeof *b);
1109
1110 b->style = link_info.emit_note_gnu_build_id;
1111 b->sec = s;
1112 elf_section_type (s) = SHT_NOTE;
1113 s->size = size;
1114 t->after_write_object_contents
1115 = &gld${EMULATION_NAME}_write_build_id_section;
1116 t->after_write_object_contents_info = b;
1117 }
1118 else
1119 {
1120 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1121 " --build-id ignored.\n");
1122 free (link_info.emit_note_gnu_build_id);
1123 link_info.emit_note_gnu_build_id = NULL;
1124 }
1125 }
1126 }
1127 }
1128
1129 if (link_info.relocatable)
1130 return;
1131
1132 if (link_info.eh_frame_hdr
1133 && !link_info.traditional_format)
1134 {
1135 bfd *abfd, *elfbfd = NULL;
1136 bfd_boolean warn_eh_frame = FALSE;
1137 asection *s;
1138
1139 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1140 {
1141 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1142 elfbfd = abfd;
1143 if (!warn_eh_frame)
1144 {
1145 s = bfd_get_section_by_name (abfd, ".eh_frame");
1146 while (s != NULL
1147 && (s->size <= 8
1148 || bfd_is_abs_section (s->output_section)))
1149 s = bfd_get_next_section_by_name (s);
1150 warn_eh_frame = s != NULL;
1151 }
1152 if (elfbfd && warn_eh_frame)
1153 break;
1154 }
1155 if (elfbfd)
1156 {
1157 const struct elf_backend_data *bed;
1158
1159 bed = get_elf_backend_data (elfbfd);
1160 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1161 bed->dynamic_sec_flags
1162 | SEC_READONLY);
1163 if (s != NULL
1164 && bfd_set_section_alignment (elfbfd, s, 2))
1165 {
1166 htab->eh_info.hdr_sec = s;
1167 warn_eh_frame = FALSE;
1168 }
1169 }
1170 if (warn_eh_frame)
1171 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1172 " --eh-frame-hdr ignored.\n");
1173 }
1174
1175 /* Get the list of files which appear in DT_NEEDED entries in
1176 dynamic objects included in the link (often there will be none).
1177 For each such file, we want to track down the corresponding
1178 library, and include the symbol table in the link. This is what
1179 the runtime dynamic linker will do. Tracking the files down here
1180 permits one dynamic object to include another without requiring
1181 special action by the person doing the link. Note that the
1182 needed list can actually grow while we are stepping through this
1183 loop. */
1184 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1185 for (l = needed; l != NULL; l = l->next)
1186 {
1187 struct bfd_link_needed_list *ll;
1188 struct dt_needed n, nn;
1189 int force;
1190
1191 /* If the lib that needs this one was --as-needed and wasn't
1192 found to be needed, then this lib isn't needed either. Skip
1193 the lib when creating a shared object unless we are copying
1194 DT_NEEDED entres. */
1195 if (l->by != NULL
1196 && ((bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0
1197 || (!link_info.executable
1198 && bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0))
1199 continue;
1200
1201 /* If we've already seen this file, skip it. */
1202 for (ll = needed; ll != l; ll = ll->next)
1203 if ((ll->by == NULL
1204 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1205 && strcmp (ll->name, l->name) == 0)
1206 break;
1207 if (ll != l)
1208 continue;
1209
1210 /* See if this file was included in the link explicitly. */
1211 global_needed = l;
1212 global_found = NULL;
1213 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1214 if (global_found != NULL
1215 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1216 & DYN_AS_NEEDED) == 0)
1217 continue;
1218
1219 n.by = l->by;
1220 n.name = l->name;
1221 nn.by = l->by;
1222 if (verbose)
1223 info_msg (_("%s needed by %B\n"), l->name, l->by);
1224
1225 /* As-needed libs specified on the command line (or linker script)
1226 take priority over libs found in search dirs. */
1227 if (global_found != NULL)
1228 {
1229 nn.name = global_found->filename;
1230 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1231 continue;
1232 }
1233
1234 /* We need to find this file and include the symbol table. We
1235 want to search for the file in the same way that the dynamic
1236 linker will search. That means that we want to use
1237 rpath_link, rpath, then the environment variable
1238 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1239 entries (native only), then the linker script LIB_SEARCH_DIRS.
1240 We do not search using the -L arguments.
1241
1242 We search twice. The first time, we skip objects which may
1243 introduce version mismatches. The second time, we force
1244 their use. See gld${EMULATION_NAME}_vercheck comment. */
1245 for (force = 0; force < 2; force++)
1246 {
1247 size_t len;
1248 search_dirs_type *search;
1249 EOF
1250 if [ "x${NATIVE}" = xyes ] ; then
1251 fragment <<EOF
1252 const char *lib_path;
1253 EOF
1254 fi
1255 if [ "x${USE_LIBPATH}" = xyes ] ; then
1256 fragment <<EOF
1257 struct bfd_link_needed_list *rp;
1258 int found;
1259 EOF
1260 fi
1261 fragment <<EOF
1262
1263 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1264 &n, force))
1265 break;
1266 EOF
1267 if [ "x${USE_LIBPATH}" = xyes ] ; then
1268 fragment <<EOF
1269 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1270 &n, force))
1271 break;
1272 EOF
1273 fi
1274 if [ "x${NATIVE}" = xyes ] ; then
1275 fragment <<EOF
1276 if (command_line.rpath_link == NULL
1277 && command_line.rpath == NULL)
1278 {
1279 lib_path = (const char *) getenv ("LD_RUN_PATH");
1280 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1281 force))
1282 break;
1283 }
1284 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1285 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1286 break;
1287 EOF
1288 fi
1289 if [ "x${USE_LIBPATH}" = xyes ] ; then
1290 fragment <<EOF
1291 found = 0;
1292 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1293 for (; !found && rp != NULL; rp = rp->next)
1294 {
1295 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1296 found = (rp->by == l->by
1297 && gld${EMULATION_NAME}_search_needed (tmpname,
1298 &n,
1299 force));
1300 free (tmpname);
1301 }
1302 if (found)
1303 break;
1304
1305 EOF
1306 fi
1307 if [ "x${USE_LIBPATH}" = xyes ] ; then
1308 case ${target} in
1309 *-*-freebsd* | *-*-dragonfly*)
1310 fragment <<EOF
1311 if (gld${EMULATION_NAME}_check_ld_elf_hints (l->name, force))
1312 break;
1313 EOF
1314 # FreeBSD
1315 ;;
1316
1317 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1318 # Linux
1319 fragment <<EOF
1320 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
1321 break;
1322
1323 EOF
1324 ;;
1325 esac
1326 fi
1327 fragment <<EOF
1328 len = strlen (l->name);
1329 for (search = search_head; search != NULL; search = search->next)
1330 {
1331 char *filename;
1332
1333 if (search->cmdline)
1334 continue;
1335 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1336 sprintf (filename, "%s/%s", search->name, l->name);
1337 nn.name = filename;
1338 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1339 break;
1340 free (filename);
1341 }
1342 if (search != NULL)
1343 break;
1344 EOF
1345 fragment <<EOF
1346 }
1347
1348 if (force < 2)
1349 continue;
1350
1351 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1352 l->name, l->by);
1353 }
1354 }
1355
1356 EOF
1357 fi
1358
1359 fragment <<EOF
1360
1361 /* Look through an expression for an assignment statement. */
1362
1363 static void
1364 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1365 {
1366 bfd_boolean provide = FALSE;
1367
1368 switch (exp->type.node_class)
1369 {
1370 case etree_provide:
1371 case etree_provided:
1372 provide = TRUE;
1373 /* Fall thru */
1374 case etree_assign:
1375 /* We call record_link_assignment even if the symbol is defined.
1376 This is because if it is defined by a dynamic object, we
1377 actually want to use the value defined by the linker script,
1378 not the value from the dynamic object (because we are setting
1379 symbols like etext). If the symbol is defined by a regular
1380 object, then, as it happens, calling record_link_assignment
1381 will do no harm. */
1382 if (strcmp (exp->assign.dst, ".") != 0)
1383 {
1384 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1385 &link_info,
1386 exp->assign.dst, provide,
1387 exp->assign.hidden))
1388 einfo ("%P%F: failed to record assignment to %s: %E\n",
1389 exp->assign.dst);
1390 }
1391 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1392 break;
1393
1394 case etree_binary:
1395 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1396 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1397 break;
1398
1399 case etree_trinary:
1400 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1401 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1402 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1403 break;
1404
1405 case etree_unary:
1406 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1407 break;
1408
1409 default:
1410 break;
1411 }
1412 }
1413
1414
1415 /* This is called by the before_allocation routine via
1416 lang_for_each_statement. It locates any assignment statements, and
1417 tells the ELF backend about them, in case they are assignments to
1418 symbols which are referred to by dynamic objects. */
1419
1420 static void
1421 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1422 {
1423 if (s->header.type == lang_assignment_statement_enum)
1424 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1425 }
1426
1427 EOF
1428
1429 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1430 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1431 ELF_INTERPRETER_SET_DEFAULT="
1432 if (sinterp != NULL)
1433 {
1434 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1435 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1436 }
1437
1438 "
1439 else
1440 ELF_INTERPRETER_SET_DEFAULT=
1441 fi
1442 fragment <<EOF
1443
1444 /* used by before_allocation and handle_option. */
1445 static void
1446 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1447 {
1448 if (*to == NULL)
1449 *to = xstrdup (op_arg);
1450 else
1451 {
1452 size_t to_len = strlen (*to);
1453 size_t op_arg_len = strlen (op_arg);
1454 char *buf;
1455 char *cp = *to;
1456
1457 /* First see whether OPTARG is already in the path. */
1458 do
1459 {
1460 if (strncmp (op_arg, cp, op_arg_len) == 0
1461 && (cp[op_arg_len] == 0
1462 || cp[op_arg_len] == config.rpath_separator))
1463 /* We found it. */
1464 break;
1465
1466 /* Not yet found. */
1467 cp = strchr (cp, config.rpath_separator);
1468 if (cp != NULL)
1469 ++cp;
1470 }
1471 while (cp != NULL);
1472
1473 if (cp == NULL)
1474 {
1475 buf = xmalloc (to_len + op_arg_len + 2);
1476 sprintf (buf, "%s%c%s", *to,
1477 config.rpath_separator, op_arg);
1478 free (*to);
1479 *to = buf;
1480 }
1481 }
1482 }
1483
1484 /* This is called after the sections have been attached to output
1485 sections, but before any sizes or addresses have been set. */
1486
1487 static void
1488 gld${EMULATION_NAME}_before_allocation (void)
1489 {
1490 const char *rpath;
1491 asection *sinterp;
1492 bfd *abfd;
1493
1494 if (link_info.hash->type == bfd_link_elf_hash_table)
1495 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1496
1497 /* If we are going to make any variable assignments, we need to let
1498 the ELF backend know about them in case the variables are
1499 referred to by dynamic objects. */
1500 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1501
1502 /* Let the ELF backend work out the sizes of any sections required
1503 by dynamic linking. */
1504 rpath = command_line.rpath;
1505 if (rpath == NULL)
1506 rpath = (const char *) getenv ("LD_RUN_PATH");
1507
1508 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1509 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1510 {
1511 const char *audit_libs = elf_dt_audit (abfd);
1512
1513 /* If the input bfd contains an audit entry, we need to add it as
1514 a dep audit entry. */
1515 if (audit_libs && *audit_libs != '\0')
1516 {
1517 char *cp = xstrdup (audit_libs);
1518 do
1519 {
1520 int more = 0;
1521 char *cp2 = strchr (cp, config.rpath_separator);
1522
1523 if (cp2)
1524 {
1525 *cp2 = '\0';
1526 more = 1;
1527 }
1528
1529 if (cp != NULL && *cp != '\0')
1530 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1531
1532 cp = more ? ++cp2 : NULL;
1533 }
1534 while (cp != NULL);
1535 }
1536 }
1537
1538 if (! (bfd_elf_size_dynamic_sections
1539 (link_info.output_bfd, command_line.soname, rpath,
1540 command_line.filter_shlib, audit, depaudit,
1541 (const char * const *) command_line.auxiliary_filters,
1542 &link_info, &sinterp)))
1543 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1544
1545 ${ELF_INTERPRETER_SET_DEFAULT}
1546 /* Let the user override the dynamic linker we are using. */
1547 if (command_line.interpreter != NULL
1548 && sinterp != NULL)
1549 {
1550 sinterp->contents = (bfd_byte *) command_line.interpreter;
1551 sinterp->size = strlen (command_line.interpreter) + 1;
1552 }
1553
1554 /* Look for any sections named .gnu.warning. As a GNU extensions,
1555 we treat such sections as containing warning messages. We print
1556 out the warning message, and then zero out the section size so
1557 that it does not get copied into the output file. */
1558
1559 {
1560 LANG_FOR_EACH_INPUT_STATEMENT (is)
1561 {
1562 asection *s;
1563 bfd_size_type sz;
1564 char *msg;
1565 bfd_boolean ret;
1566
1567 if (is->flags.just_syms)
1568 continue;
1569
1570 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1571 if (s == NULL)
1572 continue;
1573
1574 sz = s->size;
1575 msg = (char *) xmalloc ((size_t) (sz + 1));
1576 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1577 (file_ptr) 0, sz))
1578 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1579 is->the_bfd);
1580 msg[sz] = '\0';
1581 ret = link_info.callbacks->warning (&link_info, msg,
1582 (const char *) NULL,
1583 is->the_bfd, (asection *) NULL,
1584 (bfd_vma) 0);
1585 ASSERT (ret);
1586 free (msg);
1587
1588 /* Clobber the section size, so that we don't waste space
1589 copying the warning into the output file. If we've already
1590 sized the output section, adjust its size. The adjustment
1591 is on rawsize because targets that size sections early will
1592 have called lang_reset_memory_regions after sizing. */
1593 if (s->output_section != NULL
1594 && s->output_section->rawsize >= s->size)
1595 s->output_section->rawsize -= s->size;
1596
1597 s->size = 0;
1598
1599 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1600 warning section don't get copied to the output. */
1601 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1602 }
1603 }
1604
1605 before_allocation_default ();
1606
1607 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1608 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1609 }
1610
1611 EOF
1612 fi
1613
1614 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1615 fragment <<EOF
1616
1617 /* Try to open a dynamic archive. This is where we know that ELF
1618 dynamic libraries have an extension of .so (or .sl on oddball systems
1619 like hpux). */
1620
1621 static bfd_boolean
1622 gld${EMULATION_NAME}_open_dynamic_archive
1623 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1624 {
1625 const char *filename;
1626 char *string;
1627
1628 if (! entry->flags.maybe_archive)
1629 return FALSE;
1630
1631 filename = entry->filename;
1632
1633 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1634 is defined, but it does not seem worth the headache to optimize
1635 away those two bytes of space. */
1636 string = (char *) xmalloc (strlen (search->name)
1637 + strlen (filename)
1638 + strlen (arch)
1639 #ifdef EXTRA_SHLIB_EXTENSION
1640 + strlen (EXTRA_SHLIB_EXTENSION)
1641 #endif
1642 + sizeof "/lib.so");
1643
1644 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1645
1646 #ifdef EXTRA_SHLIB_EXTENSION
1647 /* Try the .so extension first. If that fails build a new filename
1648 using EXTRA_SHLIB_EXTENSION. */
1649 if (! ldfile_try_open_bfd (string, entry))
1650 {
1651 sprintf (string, "%s/lib%s%s%s", search->name,
1652 filename, arch, EXTRA_SHLIB_EXTENSION);
1653 #endif
1654
1655 if (! ldfile_try_open_bfd (string, entry))
1656 {
1657 free (string);
1658 return FALSE;
1659 }
1660 #ifdef EXTRA_SHLIB_EXTENSION
1661 }
1662 #endif
1663
1664 entry->filename = string;
1665
1666 /* We have found a dynamic object to include in the link. The ELF
1667 backend linker will create a DT_NEEDED entry in the .dynamic
1668 section naming this file. If this file includes a DT_SONAME
1669 entry, it will be used. Otherwise, the ELF linker will just use
1670 the name of the file. For an archive found by searching, like
1671 this one, the DT_NEEDED entry should consist of just the name of
1672 the file, without the path information used to find it. Note
1673 that we only need to do this if we have a dynamic object; an
1674 archive will never be referenced by a DT_NEEDED entry.
1675
1676 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1677 very pretty. I haven't been able to think of anything that is
1678 pretty, though. */
1679 if (bfd_check_format (entry->the_bfd, bfd_object)
1680 && (entry->the_bfd->flags & DYNAMIC) != 0)
1681 {
1682 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1683
1684 /* Rather than duplicating the logic above. Just use the
1685 filename we recorded earlier. */
1686
1687 filename = lbasename (entry->filename);
1688 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1689 }
1690
1691 return TRUE;
1692 }
1693
1694 EOF
1695 fi
1696
1697 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1698 fragment <<EOF
1699
1700 /* A variant of lang_output_section_find used by place_orphan. */
1701
1702 static lang_output_section_statement_type *
1703 output_rel_find (asection *sec, int isdyn)
1704 {
1705 lang_output_section_statement_type *lookup;
1706 lang_output_section_statement_type *last = NULL;
1707 lang_output_section_statement_type *last_alloc = NULL;
1708 lang_output_section_statement_type *last_ro_alloc = NULL;
1709 lang_output_section_statement_type *last_rel = NULL;
1710 lang_output_section_statement_type *last_rel_alloc = NULL;
1711 int rela = sec->name[4] == 'a';
1712
1713 for (lookup = &lang_output_section_statement.head->output_section_statement;
1714 lookup != NULL;
1715 lookup = lookup->next)
1716 {
1717 if (lookup->constraint >= 0
1718 && CONST_STRNEQ (lookup->name, ".rel"))
1719 {
1720 int lookrela = lookup->name[4] == 'a';
1721
1722 /* .rel.dyn must come before all other reloc sections, to suit
1723 GNU ld.so. */
1724 if (isdyn)
1725 break;
1726
1727 /* Don't place after .rel.plt as doing so results in wrong
1728 dynamic tags. */
1729 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1730 break;
1731
1732 if (rela == lookrela || last_rel == NULL)
1733 last_rel = lookup;
1734 if ((rela == lookrela || last_rel_alloc == NULL)
1735 && lookup->bfd_section != NULL
1736 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1737 last_rel_alloc = lookup;
1738 }
1739
1740 last = lookup;
1741 if (lookup->bfd_section != NULL
1742 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1743 {
1744 last_alloc = lookup;
1745 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1746 last_ro_alloc = lookup;
1747 }
1748 }
1749
1750 if (last_rel_alloc)
1751 return last_rel_alloc;
1752
1753 if (last_rel)
1754 return last_rel;
1755
1756 if (last_ro_alloc)
1757 return last_ro_alloc;
1758
1759 if (last_alloc)
1760 return last_alloc;
1761
1762 return last;
1763 }
1764
1765 /* Place an orphan section. We use this to put random SHF_ALLOC
1766 sections in the right segment. */
1767
1768 static lang_output_section_statement_type *
1769 gld${EMULATION_NAME}_place_orphan (asection *s,
1770 const char *secname,
1771 int constraint)
1772 {
1773 static struct orphan_save hold[] =
1774 {
1775 { ".text",
1776 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1777 0, 0, 0, 0 },
1778 { ".rodata",
1779 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1780 0, 0, 0, 0 },
1781 { ".data",
1782 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1783 0, 0, 0, 0 },
1784 { ".bss",
1785 SEC_ALLOC,
1786 0, 0, 0, 0 },
1787 { 0,
1788 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1789 0, 0, 0, 0 },
1790 { ".interp",
1791 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1792 0, 0, 0, 0 },
1793 { ".sdata",
1794 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1795 0, 0, 0, 0 },
1796 { ".comment",
1797 SEC_HAS_CONTENTS,
1798 0, 0, 0, 0 },
1799 };
1800 enum orphan_save_index
1801 {
1802 orphan_text = 0,
1803 orphan_rodata,
1804 orphan_data,
1805 orphan_bss,
1806 orphan_rel,
1807 orphan_interp,
1808 orphan_sdata,
1809 orphan_nonalloc
1810 };
1811 static int orphan_init_done = 0;
1812 struct orphan_save *place;
1813 lang_output_section_statement_type *after;
1814 lang_output_section_statement_type *os;
1815 lang_output_section_statement_type *match_by_name = NULL;
1816 int isdyn = 0;
1817 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1818 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1819
1820 if (! link_info.relocatable
1821 && link_info.combreloc
1822 && (s->flags & SEC_ALLOC))
1823 {
1824 if (iself)
1825 switch (sh_type)
1826 {
1827 case SHT_RELA:
1828 secname = ".rela.dyn";
1829 isdyn = 1;
1830 break;
1831 case SHT_REL:
1832 secname = ".rel.dyn";
1833 isdyn = 1;
1834 break;
1835 default:
1836 break;
1837 }
1838 else if (CONST_STRNEQ (secname, ".rel"))
1839 {
1840 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1841 isdyn = 1;
1842 }
1843 }
1844
1845 /* Look through the script to see where to place this section. */
1846 if (constraint == 0)
1847 for (os = lang_output_section_find (secname);
1848 os != NULL;
1849 os = next_matching_output_section_statement (os, 0))
1850 {
1851 /* If we don't match an existing output section, tell
1852 lang_insert_orphan to create a new output section. */
1853 constraint = SPECIAL;
1854
1855 if (os->bfd_section != NULL
1856 && (os->bfd_section->flags == 0
1857 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1858 os->bfd_section,
1859 s->owner, s)
1860 && ((s->flags ^ os->bfd_section->flags)
1861 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1862 {
1863 /* We already have an output section statement with this
1864 name, and its bfd section has compatible flags.
1865 If the section already exists but does not have any flags
1866 set, then it has been created by the linker, probably as a
1867 result of a --section-start command line switch. */
1868 lang_add_section (&os->children, s, NULL, os);
1869 return os;
1870 }
1871
1872 /* Save unused output sections in case we can match them
1873 against orphans later. */
1874 if (os->bfd_section == NULL)
1875 match_by_name = os;
1876 }
1877
1878 /* If we didn't match an active output section, see if we matched an
1879 unused one and use that. */
1880 if (match_by_name)
1881 {
1882 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1883 return match_by_name;
1884 }
1885
1886 if (!orphan_init_done)
1887 {
1888 struct orphan_save *ho;
1889
1890 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1891 if (ho->name != NULL)
1892 {
1893 ho->os = lang_output_section_find (ho->name);
1894 if (ho->os != NULL && ho->os->flags == 0)
1895 ho->os->flags = ho->flags;
1896 }
1897 orphan_init_done = 1;
1898 }
1899
1900 /* If this is a final link, then always put .gnu.warning.SYMBOL
1901 sections into the .text section to get them out of the way. */
1902 if (link_info.executable
1903 && ! link_info.relocatable
1904 && CONST_STRNEQ (s->name, ".gnu.warning.")
1905 && hold[orphan_text].os != NULL)
1906 {
1907 os = hold[orphan_text].os;
1908 lang_add_section (&os->children, s, NULL, os);
1909 return os;
1910 }
1911
1912 /* Decide which segment the section should go in based on the
1913 section name and section flags. We put loadable .note sections
1914 right after the .interp section, so that the PT_NOTE segment is
1915 stored right after the program headers where the OS can read it
1916 in the first page. */
1917
1918 place = NULL;
1919 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1920 place = &hold[orphan_nonalloc];
1921 else if ((s->flags & SEC_ALLOC) == 0)
1922 ;
1923 else if ((s->flags & SEC_LOAD) != 0
1924 && ((iself && sh_type == SHT_NOTE)
1925 || (!iself && CONST_STRNEQ (secname, ".note"))))
1926 place = &hold[orphan_interp];
1927 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1928 place = &hold[orphan_bss];
1929 else if ((s->flags & SEC_SMALL_DATA) != 0)
1930 place = &hold[orphan_sdata];
1931 else if ((s->flags & SEC_READONLY) == 0)
1932 place = &hold[orphan_data];
1933 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1934 || (!iself && CONST_STRNEQ (secname, ".rel")))
1935 && (s->flags & SEC_LOAD) != 0)
1936 place = &hold[orphan_rel];
1937 else if ((s->flags & SEC_CODE) == 0)
1938 place = &hold[orphan_rodata];
1939 else
1940 place = &hold[orphan_text];
1941
1942 after = NULL;
1943 if (place != NULL)
1944 {
1945 if (place->os == NULL)
1946 {
1947 if (place->name != NULL)
1948 place->os = lang_output_section_find (place->name);
1949 else
1950 place->os = output_rel_find (s, isdyn);
1951 }
1952 after = place->os;
1953 if (after == NULL)
1954 after = lang_output_section_find_by_flags
1955 (s, &place->os, _bfd_elf_match_sections_by_type);
1956 if (after == NULL)
1957 /* *ABS* is always the first output section statement. */
1958 after = &lang_output_section_statement.head->output_section_statement;
1959 }
1960
1961 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1962 }
1963 EOF
1964 fi
1965
1966 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1967 fragment <<EOF
1968
1969 static void
1970 gld${EMULATION_NAME}_after_allocation (void)
1971 {
1972 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1973 &link_info);
1974 gld${EMULATION_NAME}_map_segments (need_layout);
1975 }
1976 EOF
1977 fi
1978
1979 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1980 fragment <<EOF
1981
1982 static char *
1983 gld${EMULATION_NAME}_get_script (int *isfile)
1984 EOF
1985
1986 if test -n "$COMPILE_IN"
1987 then
1988 # Scripts compiled in.
1989
1990 # sed commands to quote an ld script as a C string.
1991 sc="-f stringify.sed"
1992
1993 fragment <<EOF
1994 {
1995 *isfile = 0;
1996
1997 if (link_info.relocatable && config.build_constructors)
1998 return
1999 EOF
2000 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2001 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
2002 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2003 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2004 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2005 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2006 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2007 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2008 fi
2009 if test -n "$GENERATE_PIE_SCRIPT" ; then
2010 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2011 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2012 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2013 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2014 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2015 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2016 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2017 fi
2018 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2019 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2020 fi
2021 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2022 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2023 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2024 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2025 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2026 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2027 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2028 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2029 fi
2030 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2031 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2032 fi
2033 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2034 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2035 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2036 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2037 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2038 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2039 fi
2040 echo ' ; else return' >> e${EMULATION_NAME}.c
2041 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2042 echo '; }' >> e${EMULATION_NAME}.c
2043
2044 else
2045 # Scripts read from the filesystem.
2046
2047 fragment <<EOF
2048 {
2049 *isfile = 1;
2050
2051 if (link_info.relocatable && config.build_constructors)
2052 return "ldscripts/${EMULATION_NAME}.xu";
2053 else if (link_info.relocatable)
2054 return "ldscripts/${EMULATION_NAME}.xr";
2055 else if (!config.text_read_only)
2056 return "ldscripts/${EMULATION_NAME}.xbn";
2057 EOF
2058 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2059 else
2060 fragment <<EOF
2061 else if (!config.magic_demand_paged)
2062 return "ldscripts/${EMULATION_NAME}.xn";
2063 EOF
2064 fi
2065 if test -n "$GENERATE_PIE_SCRIPT" ; then
2066 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2067 fragment <<EOF
2068 else if (link_info.pie && link_info.combreloc
2069 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2070 return "ldscripts/${EMULATION_NAME}.xdw";
2071 else if (link_info.pie && link_info.combreloc)
2072 return "ldscripts/${EMULATION_NAME}.xdc";
2073 EOF
2074 fi
2075 fragment <<EOF
2076 else if (link_info.pie)
2077 return "ldscripts/${EMULATION_NAME}.xd";
2078 EOF
2079 fi
2080 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2081 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2082 fragment <<EOF
2083 else if (link_info.shared && link_info.combreloc
2084 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2085 return "ldscripts/${EMULATION_NAME}.xsw";
2086 else if (link_info.shared && link_info.combreloc)
2087 return "ldscripts/${EMULATION_NAME}.xsc";
2088 EOF
2089 fi
2090 fragment <<EOF
2091 else if (link_info.shared)
2092 return "ldscripts/${EMULATION_NAME}.xs";
2093 EOF
2094 fi
2095 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2096 fragment <<EOF
2097 else if (link_info.combreloc && link_info.relro
2098 && (link_info.flags & DF_BIND_NOW))
2099 return "ldscripts/${EMULATION_NAME}.xw";
2100 else if (link_info.combreloc)
2101 return "ldscripts/${EMULATION_NAME}.xc";
2102 EOF
2103 fi
2104 fragment <<EOF
2105 else
2106 return "ldscripts/${EMULATION_NAME}.x";
2107 }
2108
2109 EOF
2110 fi
2111 fi
2112
2113 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2114 fragment <<EOF
2115 $PARSE_AND_LIST_PROLOGUE
2116 EOF
2117 fi
2118
2119 fragment <<EOF
2120
2121 #define OPTION_DISABLE_NEW_DTAGS (400)
2122 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2123 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2124 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2125 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2126 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2127 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2128 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2129
2130 static void
2131 gld${EMULATION_NAME}_add_options
2132 (int ns, char **shortopts, int nl, struct option **longopts,
2133 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2134 {
2135 EOF
2136 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2137 fragment <<EOF
2138 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2139 EOF
2140 else
2141 fragment <<EOF
2142 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2143 EOF
2144 fi
2145 fragment <<EOF
2146 static const struct option xtra_long[] = {
2147 EOF
2148 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2149 fragment <<EOF
2150 {"audit", required_argument, NULL, OPTION_AUDIT},
2151 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2152 EOF
2153 fi
2154 fragment <<EOF
2155 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2156 EOF
2157 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2158 fragment <<EOF
2159 {"depaudit", required_argument, NULL, 'P'},
2160 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2161 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2162 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2163 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2164 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2165 EOF
2166 fi
2167 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2168 fragment <<EOF
2169 $PARSE_AND_LIST_LONGOPTS
2170 EOF
2171 fi
2172 fragment <<EOF
2173 {NULL, no_argument, NULL, 0}
2174 };
2175
2176 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2177 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2178 *longopts = (struct option *)
2179 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2180 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2181 }
2182
2183 #define DEFAULT_BUILD_ID_STYLE "sha1"
2184
2185 static bfd_boolean
2186 gld${EMULATION_NAME}_handle_option (int optc)
2187 {
2188 switch (optc)
2189 {
2190 default:
2191 return FALSE;
2192
2193 case OPTION_BUILD_ID:
2194 if (link_info.emit_note_gnu_build_id != NULL)
2195 {
2196 free (link_info.emit_note_gnu_build_id);
2197 link_info.emit_note_gnu_build_id = NULL;
2198 }
2199 if (optarg == NULL)
2200 optarg = DEFAULT_BUILD_ID_STYLE;
2201 if (strcmp (optarg, "none"))
2202 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2203 break;
2204
2205 EOF
2206
2207 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2208 fragment <<EOF
2209 case OPTION_AUDIT:
2210 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2211 break;
2212
2213 case 'P':
2214 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2215 break;
2216
2217 case OPTION_DISABLE_NEW_DTAGS:
2218 link_info.new_dtags = FALSE;
2219 break;
2220
2221 case OPTION_ENABLE_NEW_DTAGS:
2222 link_info.new_dtags = TRUE;
2223 break;
2224
2225 case OPTION_EH_FRAME_HDR:
2226 link_info.eh_frame_hdr = TRUE;
2227 break;
2228
2229 case OPTION_GROUP:
2230 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2231 /* Groups must be self-contained. */
2232 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2233 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2234 break;
2235
2236 case OPTION_EXCLUDE_LIBS:
2237 add_excluded_libs (optarg);
2238 break;
2239
2240 case OPTION_HASH_STYLE:
2241 link_info.emit_hash = FALSE;
2242 link_info.emit_gnu_hash = FALSE;
2243 if (strcmp (optarg, "sysv") == 0)
2244 link_info.emit_hash = TRUE;
2245 else if (strcmp (optarg, "gnu") == 0)
2246 link_info.emit_gnu_hash = TRUE;
2247 else if (strcmp (optarg, "both") == 0)
2248 {
2249 link_info.emit_hash = TRUE;
2250 link_info.emit_gnu_hash = TRUE;
2251 }
2252 else
2253 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2254 break;
2255
2256 EOF
2257 fi
2258 fragment <<EOF
2259 case 'z':
2260 if (strcmp (optarg, "defs") == 0)
2261 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2262 else if (strcmp (optarg, "muldefs") == 0)
2263 link_info.allow_multiple_definition = TRUE;
2264 else if (CONST_STRNEQ (optarg, "max-page-size="))
2265 {
2266 char *end;
2267
2268 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2269 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2270 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2271 optarg + 14);
2272 }
2273 else if (CONST_STRNEQ (optarg, "common-page-size="))
2274 {
2275 char *end;
2276 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2277 if (*end
2278 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2279 einfo (_("%P%F: invalid common page size \`%s'\n"),
2280 optarg + 17);
2281 }
2282 else if (CONST_STRNEQ (optarg, "stack-size="))
2283 {
2284 char *end;
2285 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2286 if (*end || link_info.stacksize < 0)
2287 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2288 if (!link_info.stacksize)
2289 /* Use -1 for explicit no-stack, because zero means
2290 'default'. */
2291 link_info.stacksize = -1;
2292 }
2293 else if (strcmp (optarg, "execstack") == 0)
2294 {
2295 link_info.execstack = TRUE;
2296 link_info.noexecstack = FALSE;
2297 }
2298 else if (strcmp (optarg, "noexecstack") == 0)
2299 {
2300 link_info.noexecstack = TRUE;
2301 link_info.execstack = FALSE;
2302 }
2303 EOF
2304 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2305 fragment <<EOF
2306 else if (strcmp (optarg, "global") == 0)
2307 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2308 else if (strcmp (optarg, "initfirst") == 0)
2309 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2310 else if (strcmp (optarg, "interpose") == 0)
2311 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2312 else if (strcmp (optarg, "loadfltr") == 0)
2313 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2314 else if (strcmp (optarg, "nodefaultlib") == 0)
2315 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2316 else if (strcmp (optarg, "nodelete") == 0)
2317 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2318 else if (strcmp (optarg, "nodlopen") == 0)
2319 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2320 else if (strcmp (optarg, "nodump") == 0)
2321 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2322 else if (strcmp (optarg, "now") == 0)
2323 {
2324 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2325 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2326 }
2327 else if (strcmp (optarg, "lazy") == 0)
2328 {
2329 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2330 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2331 }
2332 else if (strcmp (optarg, "origin") == 0)
2333 {
2334 link_info.flags |= (bfd_vma) DF_ORIGIN;
2335 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2336 }
2337 else if (strcmp (optarg, "combreloc") == 0)
2338 link_info.combreloc = TRUE;
2339 else if (strcmp (optarg, "nocombreloc") == 0)
2340 link_info.combreloc = FALSE;
2341 else if (strcmp (optarg, "nocopyreloc") == 0)
2342 link_info.nocopyreloc = TRUE;
2343 else if (strcmp (optarg, "relro") == 0)
2344 link_info.relro = TRUE;
2345 else if (strcmp (optarg, "norelro") == 0)
2346 link_info.relro = FALSE;
2347 else if (strcmp (optarg, "text") == 0)
2348 link_info.error_textrel = TRUE;
2349 else if (strcmp (optarg, "notext") == 0)
2350 link_info.error_textrel = FALSE;
2351 else if (strcmp (optarg, "textoff") == 0)
2352 link_info.error_textrel = FALSE;
2353 EOF
2354 fi
2355
2356 fragment <<EOF
2357 else
2358 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2359 break;
2360 EOF
2361
2362 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2363 fragment <<EOF
2364 $PARSE_AND_LIST_ARGS_CASES
2365 EOF
2366 fi
2367
2368 fragment <<EOF
2369 }
2370
2371 return TRUE;
2372 }
2373
2374 EOF
2375
2376 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2377 fragment <<EOF
2378
2379 static void
2380 gld${EMULATION_NAME}_list_options (FILE * file)
2381 {
2382 EOF
2383 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2384 fragment <<EOF
2385 fprintf (file, _("\
2386 --audit=AUDITLIB Specify a library to use for auditing\n"));
2387 fprintf (file, _("\
2388 -Bgroup Selects group name lookup rules for DSO\n"));
2389 EOF
2390 fi
2391 fragment <<EOF
2392 fprintf (file, _("\
2393 --build-id[=STYLE] Generate build ID note\n"));
2394 EOF
2395 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2396 fragment <<EOF
2397 fprintf (file, _("\
2398 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2399 Specify a library to use for auditing dependencies\n"));
2400 fprintf (file, _("\
2401 --disable-new-dtags Disable new dynamic tags\n"));
2402 fprintf (file, _("\
2403 --enable-new-dtags Enable new dynamic tags\n"));
2404 fprintf (file, _("\
2405 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2406 fprintf (file, _("\
2407 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2408 fprintf (file, _("\
2409 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2410 fprintf (file, _("\
2411 -z combreloc Merge dynamic relocs into one section and sort\n"));
2412 EOF
2413 fi
2414
2415 fragment <<EOF
2416 fprintf (file, _("\
2417 -z common-page-size=SIZE Set common page size to SIZE\n"));
2418 fprintf (file, _("\
2419 -z defs Report unresolved symbols in object files.\n"));
2420 fprintf (file, _("\
2421 -z execstack Mark executable as requiring executable stack\n"));
2422 EOF
2423
2424 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2425 fragment <<EOF
2426 fprintf (file, _("\
2427 -z global Make symbols in DSO available for subsequently\n\
2428 loaded objects\n"));
2429 fprintf (file, _("\
2430 -z initfirst Mark DSO to be initialized first at runtime\n"));
2431 fprintf (file, _("\
2432 -z interpose Mark object to interpose all DSOs but executable\n"));
2433 fprintf (file, _("\
2434 -z lazy Mark object lazy runtime binding (default)\n"));
2435 fprintf (file, _("\
2436 -z loadfltr Mark object requiring immediate process\n"));
2437 EOF
2438 fi
2439
2440 fragment <<EOF
2441 fprintf (file, _("\
2442 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2443 fprintf (file, _("\
2444 -z muldefs Allow multiple definitions\n"));
2445 EOF
2446
2447 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2448 fragment <<EOF
2449 fprintf (file, _("\
2450 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2451 fprintf (file, _("\
2452 -z nocopyreloc Don't create copy relocs\n"));
2453 fprintf (file, _("\
2454 -z nodefaultlib Mark object not to use default search paths\n"));
2455 fprintf (file, _("\
2456 -z nodelete Mark DSO non-deletable at runtime\n"));
2457 fprintf (file, _("\
2458 -z nodlopen Mark DSO not available to dlopen\n"));
2459 fprintf (file, _("\
2460 -z nodump Mark DSO not available to dldump\n"));
2461 EOF
2462 fi
2463 fragment <<EOF
2464 fprintf (file, _("\
2465 -z noexecstack Mark executable as not requiring executable stack\n"));
2466 EOF
2467 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2468 fragment <<EOF
2469 fprintf (file, _("\
2470 -z norelro Don't create RELRO program header\n"));
2471 fprintf (file, _("\
2472 -z now Mark object non-lazy runtime binding\n"));
2473 fprintf (file, _("\
2474 -z origin Mark object requiring immediate \$ORIGIN\n\
2475 processing at runtime\n"));
2476 fprintf (file, _("\
2477 -z relro Create RELRO program header\n"));
2478 fprintf (file, _("\
2479 -z stacksize=SIZE Set size of stack segment\n"));
2480 EOF
2481 fi
2482
2483 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2484 fragment <<EOF
2485 $PARSE_AND_LIST_OPTIONS
2486 EOF
2487 fi
2488
2489 fragment <<EOF
2490 }
2491 EOF
2492
2493 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2494 fragment <<EOF
2495 $PARSE_AND_LIST_EPILOGUE
2496 EOF
2497 fi
2498 fi
2499
2500 fragment <<EOF
2501
2502 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2503 {
2504 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2505 ${LDEMUL_SYSLIB-syslib_default},
2506 ${LDEMUL_HLL-hll_default},
2507 ${LDEMUL_AFTER_PARSE-after_parse_default},
2508 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2509 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2510 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2511 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2512 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2513 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2514 "${EMULATION_NAME}",
2515 "${OUTPUT_FORMAT}",
2516 ${LDEMUL_FINISH-finish_default},
2517 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2518 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2519 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2520 ${LDEMUL_SET_SYMBOLS-NULL},
2521 ${LDEMUL_PARSE_ARGS-NULL},
2522 gld${EMULATION_NAME}_add_options,
2523 gld${EMULATION_NAME}_handle_option,
2524 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2525 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2526 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2527 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2528 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2529 };
2530 EOF
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