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[thirdparty/binutils-gdb.git] / ld / emultempl / elf32.em
1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
3 # This file is now misnamed, because it supports both 32 bit and 64 bit
4 # ELF emulations.
5 test -z "${ELFSIZE}" && ELFSIZE=32
6 if [ -z "$MACHINE" ]; then
7 OUTPUT_ARCH=${ARCH}
8 else
9 OUTPUT_ARCH=${ARCH}:${MACHINE}
10 fi
11 fragment <<EOF
12 /* This file is is generated by a shell script. DO NOT EDIT! */
13
14 /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
17 Free Software Foundation, Inc.
18 Written by Steve Chamberlain <sac@cygnus.com>
19 ELF support by Ian Lance Taylor <ian@cygnus.com>
20
21 This file is part of the GNU Binutils.
22
23 This program is free software; you can redistribute it and/or modify
24 it under the terms of the GNU General Public License as published by
25 the Free Software Foundation; either version 3 of the License, or
26 (at your option) any later version.
27
28 This program is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
32
33 You should have received a copy of the GNU General Public License
34 along with this program; if not, write to the Free Software
35 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
36 MA 02110-1301, USA. */
37
38 #define TARGET_IS_${EMULATION_NAME}
39
40 #include "sysdep.h"
41 #include "bfd.h"
42 #include "libiberty.h"
43 #include "filenames.h"
44 #include "safe-ctype.h"
45 #include "getopt.h"
46 #include "md5.h"
47 #include "sha1.h"
48 #include <fcntl.h>
49
50 #include "bfdlink.h"
51
52 #include "ld.h"
53 #include "ldmain.h"
54 #include "ldmisc.h"
55 #include "ldexp.h"
56 #include "ldlang.h"
57 #include "ldfile.h"
58 #include "ldemul.h"
59 #include <ldgram.h>
60 #include "elf/common.h"
61 #include "elf-bfd.h"
62 #include "filenames.h"
63
64 /* Declare functions used by various EXTRA_EM_FILEs. */
65 static void gld${EMULATION_NAME}_before_parse (void);
66 static void gld${EMULATION_NAME}_after_open (void);
67 static void gld${EMULATION_NAME}_before_allocation (void);
68 static void gld${EMULATION_NAME}_after_allocation (void);
69 static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan
70 (asection *, const char *, int);
71 EOF
72
73 if [ "x${USE_LIBPATH}" = xyes ] ; then
74 case ${target} in
75 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
76 fragment <<EOF
77 #ifdef HAVE_GLOB
78 #include <glob.h>
79 #endif
80 EOF
81 ;;
82 esac
83 fi
84
85 # Import any needed special functions and/or overrides.
86 #
87 source_em ${srcdir}/emultempl/elf-generic.em
88 if test -n "$EXTRA_EM_FILE" ; then
89 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
90 fi
91
92 # Functions in this file can be overridden by setting the LDEMUL_* shell
93 # variables. If the name of the overriding function is the same as is
94 # defined in this file, then don't output this file's version.
95 # If a different overriding name is given then output the standard function
96 # as presumably it is called from the overriding function.
97 #
98 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
99 fragment <<EOF
100
101 static void
102 gld${EMULATION_NAME}_before_parse (void)
103 {
104 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
105 input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
106 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
107 config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
108 }
109
110 EOF
111 fi
112
113 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
114 fragment <<EOF
115 /* Handle the generation of DT_NEEDED tags. */
116
117 static bfd_boolean
118 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
119 {
120 int link_class = 0;
121
122 /* Tell the ELF linker that we don't want the output file to have a
123 DT_NEEDED entry for this file, unless it is used to resolve
124 references in a regular object. */
125 if (entry->flags.add_DT_NEEDED_for_regular)
126 link_class = DYN_AS_NEEDED;
127
128 /* Tell the ELF linker that we don't want the output file to have a
129 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
130 this file at all. */
131 if (!entry->flags.add_DT_NEEDED_for_dynamic)
132 link_class |= DYN_NO_ADD_NEEDED;
133
134 if (entry->flags.just_syms
135 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
136 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
137 entry->the_bfd);
138
139 if (link_class == 0
140 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
141 return FALSE;
142
143 bfd_elf_set_dyn_lib_class (entry->the_bfd,
144 (enum dynamic_lib_link_class) link_class);
145
146 /* Continue on with normal load_symbols processing. */
147 return FALSE;
148 }
149 EOF
150 fi
151
152 fragment <<EOF
153
154 /* These variables are required to pass information back and forth
155 between after_open and check_needed and stat_needed and vercheck. */
156
157 static struct bfd_link_needed_list *global_needed;
158 static struct stat global_stat;
159 static lang_input_statement_type *global_found;
160 static struct bfd_link_needed_list *global_vercheck_needed;
161 static bfd_boolean global_vercheck_failed;
162
163 /* These variables are used to implement target options */
164
165 static char *audit; /* colon (typically) separated list of libs */
166 static char *depaudit; /* colon (typically) separated list of libs */
167
168 /* Style of .note.gnu.build-id section. */
169 static const char *emit_note_gnu_build_id;
170
171 /* On Linux, it's possible to have different versions of the same
172 shared library linked against different versions of libc. The
173 dynamic linker somehow tags which libc version to use in
174 /etc/ld.so.cache, and, based on the libc that it sees in the
175 executable, chooses which version of the shared library to use.
176
177 We try to do a similar check here by checking whether this shared
178 library needs any other shared libraries which may conflict with
179 libraries we have already included in the link. If it does, we
180 skip it, and try to find another shared library farther on down the
181 link path.
182
183 This is called via lang_for_each_input_file.
184 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
185 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
186 a conflicting version. */
187
188 static void
189 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
190 {
191 const char *soname;
192 struct bfd_link_needed_list *l;
193
194 if (global_vercheck_failed)
195 return;
196 if (s->the_bfd == NULL
197 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
198 return;
199
200 soname = bfd_elf_get_dt_soname (s->the_bfd);
201 if (soname == NULL)
202 soname = lbasename (bfd_get_filename (s->the_bfd));
203
204 for (l = global_vercheck_needed; l != NULL; l = l->next)
205 {
206 const char *suffix;
207
208 if (filename_cmp (soname, l->name) == 0)
209 {
210 /* Probably can't happen, but it's an easy check. */
211 continue;
212 }
213
214 if (strchr (l->name, '/') != NULL)
215 continue;
216
217 suffix = strstr (l->name, ".so.");
218 if (suffix == NULL)
219 continue;
220
221 suffix += sizeof ".so." - 1;
222
223 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
224 {
225 /* Here we know that S is a dynamic object FOO.SO.VER1, and
226 the object we are considering needs a dynamic object
227 FOO.SO.VER2, and VER1 and VER2 are different. This
228 appears to be a version mismatch, so we tell the caller
229 to try a different version of this library. */
230 global_vercheck_failed = TRUE;
231 return;
232 }
233 }
234 }
235
236
237 /* See if an input file matches a DT_NEEDED entry by running stat on
238 the file. */
239
240 static void
241 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
242 {
243 struct stat st;
244 const char *suffix;
245 const char *soname;
246
247 if (global_found != NULL)
248 return;
249 if (s->the_bfd == NULL)
250 return;
251
252 /* If this input file was an as-needed entry, and wasn't found to be
253 needed at the stage it was linked, then don't say we have loaded it. */
254 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
255 return;
256
257 if (bfd_stat (s->the_bfd, &st) != 0)
258 {
259 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
260 return;
261 }
262
263 /* Some operating systems, e.g. Windows, do not provide a meaningful
264 st_ino; they always set it to zero. (Windows does provide a
265 meaningful st_dev.) Do not indicate a duplicate library in that
266 case. While there is no guarantee that a system that provides
267 meaningful inode numbers will never set st_ino to zero, this is
268 merely an optimization, so we do not need to worry about false
269 negatives. */
270 if (st.st_dev == global_stat.st_dev
271 && st.st_ino == global_stat.st_ino
272 && st.st_ino != 0)
273 {
274 global_found = s;
275 return;
276 }
277
278 /* We issue a warning if it looks like we are including two
279 different versions of the same shared library. For example,
280 there may be a problem if -lc picks up libc.so.6 but some other
281 shared library has a DT_NEEDED entry of libc.so.5. This is a
282 heuristic test, and it will only work if the name looks like
283 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
284 If we really want to issue warnings about mixing version numbers
285 of shared libraries, we need to find a better way. */
286
287 if (strchr (global_needed->name, '/') != NULL)
288 return;
289 suffix = strstr (global_needed->name, ".so.");
290 if (suffix == NULL)
291 return;
292 suffix += sizeof ".so." - 1;
293
294 soname = bfd_elf_get_dt_soname (s->the_bfd);
295 if (soname == NULL)
296 soname = lbasename (s->filename);
297
298 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
299 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
300 global_needed->name, global_needed->by, soname);
301 }
302
303 struct dt_needed
304 {
305 bfd *by;
306 const char *name;
307 };
308
309 /* This function is called for each possible name for a dynamic object
310 named by a DT_NEEDED entry. The FORCE parameter indicates whether
311 to skip the check for a conflicting version. */
312
313 static bfd_boolean
314 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
315 int force)
316 {
317 bfd *abfd;
318 const char *name = needed->name;
319 const char *soname;
320 int link_class;
321
322 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
323 if (abfd == NULL)
324 return FALSE;
325
326 /* Linker needs to decompress sections. */
327 abfd->flags |= BFD_DECOMPRESS;
328
329 if (! bfd_check_format (abfd, bfd_object))
330 {
331 bfd_close (abfd);
332 return FALSE;
333 }
334 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
335 {
336 bfd_close (abfd);
337 return FALSE;
338 }
339
340 /* For DT_NEEDED, they have to match. */
341 if (abfd->xvec != link_info.output_bfd->xvec)
342 {
343 bfd_close (abfd);
344 return FALSE;
345 }
346
347 /* Check whether this object would include any conflicting library
348 versions. If FORCE is set, then we skip this check; we use this
349 the second time around, if we couldn't find any compatible
350 instance of the shared library. */
351
352 if (! force)
353 {
354 struct bfd_link_needed_list *needs;
355
356 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
357 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
358
359 if (needs != NULL)
360 {
361 global_vercheck_needed = needs;
362 global_vercheck_failed = FALSE;
363 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
364 if (global_vercheck_failed)
365 {
366 bfd_close (abfd);
367 /* Return FALSE to force the caller to move on to try
368 another file on the search path. */
369 return FALSE;
370 }
371
372 /* But wait! It gets much worse. On Linux, if a shared
373 library does not use libc at all, we are supposed to skip
374 it the first time around in case we encounter a shared
375 library later on with the same name which does use the
376 version of libc that we want. This is much too horrible
377 to use on any system other than Linux. */
378
379 EOF
380 case ${target} in
381 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
382 fragment <<EOF
383 {
384 struct bfd_link_needed_list *l;
385
386 for (l = needs; l != NULL; l = l->next)
387 if (CONST_STRNEQ (l->name, "libc.so"))
388 break;
389 if (l == NULL)
390 {
391 bfd_close (abfd);
392 return FALSE;
393 }
394 }
395
396 EOF
397 ;;
398 esac
399 fragment <<EOF
400 }
401 }
402
403 /* We've found a dynamic object matching the DT_NEEDED entry. */
404
405 /* We have already checked that there is no other input file of the
406 same name. We must now check again that we are not including the
407 same file twice. We need to do this because on many systems
408 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
409 reference libc.so.1. If we have already included libc.so, we
410 don't want to include libc.so.1 if they are the same file, and we
411 can only check that using stat. */
412
413 if (bfd_stat (abfd, &global_stat) != 0)
414 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
415
416 /* First strip off everything before the last '/'. */
417 soname = lbasename (abfd->filename);
418
419 if (verbose)
420 info_msg (_("found %s at %s\n"), soname, name);
421
422 global_found = NULL;
423 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
424 if (global_found != NULL)
425 {
426 /* Return TRUE to indicate that we found the file, even though
427 we aren't going to do anything with it. */
428 return TRUE;
429 }
430
431 /* Specify the soname to use. */
432 bfd_elf_set_dt_needed_name (abfd, soname);
433
434 /* Tell the ELF linker that we don't want the output file to have a
435 DT_NEEDED entry for this file, unless it is used to resolve
436 references in a regular object. */
437 link_class = DYN_DT_NEEDED;
438
439 /* Tell the ELF linker that we don't want the output file to have a
440 DT_NEEDED entry for this file at all if the entry is from a file
441 with DYN_NO_ADD_NEEDED. */
442 if (needed->by != NULL
443 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
444 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
445
446 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
447
448 /* Add this file into the symbol table. */
449 if (! bfd_link_add_symbols (abfd, &link_info))
450 einfo ("%F%B: error adding symbols: %E\n", abfd);
451
452 return TRUE;
453 }
454
455
456 /* Search for a needed file in a path. */
457
458 static bfd_boolean
459 gld${EMULATION_NAME}_search_needed (const char *path,
460 struct dt_needed *n, int force)
461 {
462 const char *s;
463 const char *name = n->name;
464 size_t len;
465 struct dt_needed needed;
466
467 if (name[0] == '/')
468 return gld${EMULATION_NAME}_try_needed (n, force);
469
470 if (path == NULL || *path == '\0')
471 return FALSE;
472
473 needed.by = n->by;
474 needed.name = n->name;
475
476 len = strlen (name);
477 while (1)
478 {
479 char *filename, *sset;
480
481 s = strchr (path, config.rpath_separator);
482 if (s == NULL)
483 s = path + strlen (path);
484
485 #if HAVE_DOS_BASED_FILE_SYSTEM
486 /* Assume a match on the second char is part of drive specifier. */
487 else if (config.rpath_separator == ':'
488 && s == path + 1
489 && ISALPHA (*path))
490 {
491 s = strchr (s + 1, config.rpath_separator);
492 if (s == NULL)
493 s = path + strlen (path);
494 }
495 #endif
496 filename = (char *) xmalloc (s - path + len + 2);
497 if (s == path)
498 sset = filename;
499 else
500 {
501 memcpy (filename, path, s - path);
502 filename[s - path] = '/';
503 sset = filename + (s - path) + 1;
504 }
505 strcpy (sset, name);
506
507 needed.name = filename;
508 if (gld${EMULATION_NAME}_try_needed (&needed, force))
509 return TRUE;
510
511 free (filename);
512
513 if (*s == '\0')
514 break;
515 path = s + 1;
516 }
517
518 return FALSE;
519 }
520
521 EOF
522 if [ "x${USE_LIBPATH}" = xyes ] ; then
523 fragment <<EOF
524
525 /* Add the sysroot to every entry in a path separated by
526 config.rpath_separator. */
527
528 static char *
529 gld${EMULATION_NAME}_add_sysroot (const char *path)
530 {
531 int len, colons, i;
532 char *ret, *p;
533
534 len = strlen (path);
535 colons = 0;
536 i = 0;
537 while (path[i])
538 if (path[i++] == config.rpath_separator)
539 colons++;
540
541 if (path[i])
542 colons++;
543
544 len = len + (colons + 1) * strlen (ld_sysroot);
545 ret = xmalloc (len + 1);
546 strcpy (ret, ld_sysroot);
547 p = ret + strlen (ret);
548 i = 0;
549 while (path[i])
550 if (path[i] == config.rpath_separator)
551 {
552 *p++ = path[i++];
553 strcpy (p, ld_sysroot);
554 p = p + strlen (p);
555 }
556 else
557 *p++ = path[i++];
558
559 *p = 0;
560 return ret;
561 }
562
563 EOF
564 case ${target} in
565 *-*-freebsd* | *-*-dragonfly*)
566 fragment <<EOF
567 /* Read the system search path the FreeBSD way rather than the Linux way. */
568 #ifdef HAVE_ELF_HINTS_H
569 #include <elf-hints.h>
570 #else
571 #include "elf-hints-local.h"
572 #endif
573
574 static bfd_boolean
575 gld${EMULATION_NAME}_check_ld_elf_hints (const struct bfd_link_needed_list *l,
576 int force)
577 {
578 static bfd_boolean initialized;
579 static char *ld_elf_hints;
580 struct dt_needed needed;
581
582 if (!initialized)
583 {
584 FILE *f;
585 char *tmppath;
586
587 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
588 f = fopen (tmppath, FOPEN_RB);
589 free (tmppath);
590 if (f != NULL)
591 {
592 struct elfhints_hdr hdr;
593
594 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
595 && hdr.magic == ELFHINTS_MAGIC
596 && hdr.version == 1)
597 {
598 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
599 {
600 char *b;
601
602 b = xmalloc (hdr.dirlistlen + 1);
603 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
604 hdr.dirlistlen + 1)
605 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
606
607 free (b);
608 }
609 }
610 fclose (f);
611 }
612
613 initialized = TRUE;
614 }
615
616 if (ld_elf_hints == NULL)
617 return FALSE;
618
619 needed.by = l->by;
620 needed.name = l->name;
621 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, &needed, force);
622 }
623 EOF
624 # FreeBSD
625 ;;
626
627 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
628 fragment <<EOF
629 /* For a native linker, check the file /etc/ld.so.conf for directories
630 in which we may find shared libraries. /etc/ld.so.conf is really
631 only meaningful on Linux. */
632
633 struct gld${EMULATION_NAME}_ld_so_conf
634 {
635 char *path;
636 size_t len, alloc;
637 };
638
639 static bfd_boolean
640 gld${EMULATION_NAME}_parse_ld_so_conf
641 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
642
643 static void
644 gld${EMULATION_NAME}_parse_ld_so_conf_include
645 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
646 const char *pattern)
647 {
648 char *newp = NULL;
649 #ifdef HAVE_GLOB
650 glob_t gl;
651 #endif
652
653 if (pattern[0] != '/')
654 {
655 char *p = strrchr (filename, '/');
656 size_t patlen = strlen (pattern) + 1;
657
658 newp = xmalloc (p - filename + 1 + patlen);
659 memcpy (newp, filename, p - filename + 1);
660 memcpy (newp + (p - filename + 1), pattern, patlen);
661 pattern = newp;
662 }
663
664 #ifdef HAVE_GLOB
665 if (glob (pattern, 0, NULL, &gl) == 0)
666 {
667 size_t i;
668
669 for (i = 0; i < gl.gl_pathc; ++i)
670 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
671 globfree (&gl);
672 }
673 #else
674 /* If we do not have glob, treat the pattern as a literal filename. */
675 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
676 #endif
677
678 if (newp)
679 free (newp);
680 }
681
682 static bfd_boolean
683 gld${EMULATION_NAME}_parse_ld_so_conf
684 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
685 {
686 FILE *f = fopen (filename, FOPEN_RT);
687 char *line;
688 size_t linelen;
689
690 if (f == NULL)
691 return FALSE;
692
693 linelen = 256;
694 line = xmalloc (linelen);
695 do
696 {
697 char *p = line, *q;
698
699 /* Normally this would use getline(3), but we need to be portable. */
700 while ((q = fgets (p, linelen - (p - line), f)) != NULL
701 && strlen (q) == linelen - (p - line) - 1
702 && line[linelen - 2] != '\n')
703 {
704 line = xrealloc (line, 2 * linelen);
705 p = line + linelen - 1;
706 linelen += linelen;
707 }
708
709 if (q == NULL && p == line)
710 break;
711
712 p = strchr (line, '\n');
713 if (p)
714 *p = '\0';
715
716 /* Because the file format does not know any form of quoting we
717 can search forward for the next '#' character and if found
718 make it terminating the line. */
719 p = strchr (line, '#');
720 if (p)
721 *p = '\0';
722
723 /* Remove leading whitespace. NUL is no whitespace character. */
724 p = line;
725 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
726 ++p;
727
728 /* If the line is blank it is ignored. */
729 if (p[0] == '\0')
730 continue;
731
732 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
733 {
734 char *dir, c;
735 p += 8;
736 do
737 {
738 while (*p == ' ' || *p == '\t')
739 ++p;
740
741 if (*p == '\0')
742 break;
743
744 dir = p;
745
746 while (*p != ' ' && *p != '\t' && *p)
747 ++p;
748
749 c = *p;
750 *p++ = '\0';
751 if (dir[0] != '\0')
752 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
753 dir);
754 }
755 while (c != '\0');
756 }
757 else
758 {
759 char *dir = p;
760 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
761 && *p != '\r' && *p != '\v')
762 ++p;
763
764 while (p != dir && p[-1] == '/')
765 --p;
766 if (info->path == NULL)
767 {
768 info->alloc = p - dir + 1 + 256;
769 info->path = xmalloc (info->alloc);
770 info->len = 0;
771 }
772 else
773 {
774 if (info->len + 1 + (p - dir) >= info->alloc)
775 {
776 info->alloc += p - dir + 256;
777 info->path = xrealloc (info->path, info->alloc);
778 }
779 info->path[info->len++] = config.rpath_separator;
780 }
781 memcpy (info->path + info->len, dir, p - dir);
782 info->len += p - dir;
783 info->path[info->len] = '\0';
784 }
785 }
786 while (! feof (f));
787 free (line);
788 fclose (f);
789 return TRUE;
790 }
791
792 static bfd_boolean
793 gld${EMULATION_NAME}_check_ld_so_conf (const struct bfd_link_needed_list *l,
794 int force)
795 {
796 static bfd_boolean initialized;
797 static char *ld_so_conf;
798 struct dt_needed needed;
799
800 if (! initialized)
801 {
802 char *tmppath;
803 struct gld${EMULATION_NAME}_ld_so_conf info;
804
805 info.path = NULL;
806 info.len = info.alloc = 0;
807 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
808 (const char *) NULL);
809 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
810 {
811 free (tmppath);
812 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
813 (const char *) NULL);
814 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
815 }
816 free (tmppath);
817
818 if (info.path)
819 {
820 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
821 free (info.path);
822 ld_so_conf = d;
823 }
824 initialized = TRUE;
825 }
826
827 if (ld_so_conf == NULL)
828 return FALSE;
829
830
831 needed.by = l->by;
832 needed.name = l->name;
833 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
834 }
835
836 EOF
837 # Linux
838 ;;
839 esac
840 fi
841 fragment <<EOF
842
843 /* See if an input file matches a DT_NEEDED entry by name. */
844
845 static void
846 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
847 {
848 const char *soname;
849
850 /* Stop looking if we've found a loaded lib. */
851 if (global_found != NULL
852 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
853 & DYN_AS_NEEDED) == 0)
854 return;
855
856 if (s->filename == NULL || s->the_bfd == NULL)
857 return;
858
859 /* Don't look for a second non-loaded as-needed lib. */
860 if (global_found != NULL
861 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
862 return;
863
864 if (filename_cmp (s->filename, global_needed->name) == 0)
865 {
866 global_found = s;
867 return;
868 }
869
870 if (s->flags.search_dirs)
871 {
872 const char *f = strrchr (s->filename, '/');
873 if (f != NULL
874 && filename_cmp (f + 1, global_needed->name) == 0)
875 {
876 global_found = s;
877 return;
878 }
879 }
880
881 soname = bfd_elf_get_dt_soname (s->the_bfd);
882 if (soname != NULL
883 && filename_cmp (soname, global_needed->name) == 0)
884 {
885 global_found = s;
886 return;
887 }
888 }
889
890 EOF
891
892 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
893 fragment <<EOF
894
895 static bfd_size_type
896 id_note_section_size (bfd *abfd)
897 {
898 const char *style = emit_note_gnu_build_id;
899 bfd_size_type size;
900
901 abfd = abfd;
902
903 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
904 size = (size + 3) & -(bfd_size_type) 4;
905
906 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
907 size += 128 / 8;
908 else if (!strcmp (style, "sha1"))
909 size += 160 / 8;
910 else if (!strncmp (style, "0x", 2))
911 {
912 /* ID is in string form (hex). Convert to bits. */
913 const char *id = style + 2;
914 do
915 {
916 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
917 {
918 ++size;
919 id += 2;
920 }
921 else if (*id == '-' || *id == ':')
922 ++id;
923 else
924 {
925 size = 0;
926 break;
927 }
928 } while (*id != '\0');
929 }
930 else
931 size = 0;
932
933 return size;
934 }
935
936 static unsigned char
937 read_hex (const char xdigit)
938 {
939 if (ISDIGIT (xdigit))
940 return xdigit - '0';
941 if (ISUPPER (xdigit))
942 return xdigit - 'A' + 0xa;
943 if (ISLOWER (xdigit))
944 return xdigit - 'a' + 0xa;
945 abort ();
946 return 0;
947 }
948
949 static bfd_boolean
950 write_build_id (bfd *abfd)
951 {
952 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
953 struct elf_obj_tdata *t = elf_tdata (abfd);
954 const char *style;
955 asection *asec;
956 Elf_Internal_Shdr *i_shdr;
957 unsigned char *contents, *id_bits;
958 bfd_size_type size;
959 file_ptr position;
960 Elf_External_Note *e_note;
961 typedef void (*sum_fn) (const void *, size_t, void *);
962
963 style = t->o->build_id.style;
964 asec = t->o->build_id.sec;
965 if (bfd_is_abs_section (asec->output_section))
966 {
967 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
968 " --build-id ignored.\n"));
969 return TRUE;
970 }
971 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
972
973 if (i_shdr->contents == NULL)
974 {
975 if (asec->contents == NULL)
976 asec->contents = (unsigned char *) xmalloc (asec->size);
977 contents = asec->contents;
978 }
979 else
980 contents = i_shdr->contents + asec->output_offset;
981
982 e_note = (Elf_External_Note *) contents;
983 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
984 size = (size + 3) & -(bfd_size_type) 4;
985 id_bits = contents + size;
986 size = asec->size - size;
987
988 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
989 bfd_h_put_32 (abfd, size, &e_note->descsz);
990 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
991 memcpy (e_note->name, "GNU", sizeof "GNU");
992
993 if (strcmp (style, "md5") == 0)
994 {
995 struct md5_ctx ctx;
996
997 md5_init_ctx (&ctx);
998 if (!bed->s->checksum_contents (abfd, (sum_fn) &md5_process_bytes, &ctx))
999 return FALSE;
1000 md5_finish_ctx (&ctx, id_bits);
1001 }
1002 else if (strcmp (style, "sha1") == 0)
1003 {
1004 struct sha1_ctx ctx;
1005
1006 sha1_init_ctx (&ctx);
1007 if (!bed->s->checksum_contents (abfd, (sum_fn) &sha1_process_bytes, &ctx))
1008 return FALSE;
1009 sha1_finish_ctx (&ctx, id_bits);
1010 }
1011 else if (strcmp (style, "uuid") == 0)
1012 {
1013 int n;
1014 int fd = open ("/dev/urandom", O_RDONLY);
1015 if (fd < 0)
1016 return FALSE;
1017 n = read (fd, id_bits, size);
1018 close (fd);
1019 if (n < (int) size)
1020 return FALSE;
1021 }
1022 else if (strncmp (style, "0x", 2) == 0)
1023 {
1024 /* ID is in string form (hex). Convert to bits. */
1025 const char *id = style + 2;
1026 size_t n = 0;
1027 do
1028 {
1029 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1030 {
1031 id_bits[n] = read_hex (*id++) << 4;
1032 id_bits[n++] |= read_hex (*id++);
1033 }
1034 else if (*id == '-' || *id == ':')
1035 ++id;
1036 else
1037 abort (); /* Should have been validated earlier. */
1038 } while (*id != '\0');
1039 }
1040 else
1041 abort (); /* Should have been validated earlier. */
1042
1043 position = i_shdr->sh_offset + asec->output_offset;
1044 size = asec->size;
1045 return (bfd_seek (abfd, position, SEEK_SET) == 0
1046 && bfd_bwrite (contents, size, abfd) == size);
1047 }
1048
1049 /* Make .note.gnu.build-id section, and set up elf_tdata->build_id. */
1050
1051 static bfd_boolean
1052 setup_build_id (bfd *ibfd)
1053 {
1054 asection *s;
1055 bfd_size_type size;
1056 flagword flags;
1057
1058 size = id_note_section_size (ibfd);
1059 if (size == 0)
1060 {
1061 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1062 return FALSE;
1063 }
1064
1065 flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
1066 | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
1067 s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags);
1068 if (s != NULL && bfd_set_section_alignment (ibfd, s, 2))
1069 {
1070 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1071 t->o->build_id.after_write_object_contents = &write_build_id;
1072 t->o->build_id.style = emit_note_gnu_build_id;
1073 t->o->build_id.sec = s;
1074 elf_section_type (s) = SHT_NOTE;
1075 s->size = size;
1076 return TRUE;
1077 }
1078
1079 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1080 " --build-id ignored.\n");
1081 return FALSE;
1082 }
1083
1084 /* This is called after all the input files have been opened. */
1085
1086 static void
1087 gld${EMULATION_NAME}_after_open (void)
1088 {
1089 struct bfd_link_needed_list *needed, *l;
1090 struct elf_link_hash_table *htab;
1091
1092 after_open_default ();
1093
1094 htab = elf_hash_table (&link_info);
1095 if (!is_elf_hash_table (htab))
1096 return;
1097
1098 if (emit_note_gnu_build_id != NULL)
1099 {
1100 bfd *abfd;
1101
1102 /* Find an ELF input. */
1103 for (abfd = link_info.input_bfds;
1104 abfd != (bfd *) NULL; abfd = abfd->link_next)
1105 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1106 break;
1107
1108 /* PR 10555: If there are no ELF input files do not try to
1109 create a .note.gnu-build-id section. */
1110 if (abfd == NULL
1111 || !setup_build_id (abfd))
1112 {
1113 free ((char *) emit_note_gnu_build_id);
1114 emit_note_gnu_build_id = NULL;
1115 }
1116 }
1117
1118 if (link_info.relocatable)
1119 return;
1120
1121 if (link_info.eh_frame_hdr
1122 && !link_info.traditional_format)
1123 {
1124 bfd *abfd, *elfbfd = NULL;
1125 bfd_boolean warn_eh_frame = FALSE;
1126 asection *s;
1127
1128 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1129 {
1130 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1131 elfbfd = abfd;
1132 if (!warn_eh_frame)
1133 {
1134 s = bfd_get_section_by_name (abfd, ".eh_frame");
1135 while (s != NULL
1136 && (s->size <= 8
1137 || bfd_is_abs_section (s->output_section)))
1138 s = bfd_get_next_section_by_name (s);
1139 warn_eh_frame = s != NULL;
1140 }
1141 if (elfbfd && warn_eh_frame)
1142 break;
1143 }
1144 if (elfbfd)
1145 {
1146 const struct elf_backend_data *bed;
1147
1148 bed = get_elf_backend_data (elfbfd);
1149 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1150 bed->dynamic_sec_flags
1151 | SEC_READONLY);
1152 if (s != NULL
1153 && bfd_set_section_alignment (elfbfd, s, 2))
1154 {
1155 htab->eh_info.hdr_sec = s;
1156 warn_eh_frame = FALSE;
1157 }
1158 }
1159 if (warn_eh_frame)
1160 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1161 " --eh-frame-hdr ignored.\n");
1162 }
1163
1164 /* Get the list of files which appear in DT_NEEDED entries in
1165 dynamic objects included in the link (often there will be none).
1166 For each such file, we want to track down the corresponding
1167 library, and include the symbol table in the link. This is what
1168 the runtime dynamic linker will do. Tracking the files down here
1169 permits one dynamic object to include another without requiring
1170 special action by the person doing the link. Note that the
1171 needed list can actually grow while we are stepping through this
1172 loop. */
1173 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1174 for (l = needed; l != NULL; l = l->next)
1175 {
1176 struct bfd_link_needed_list *ll;
1177 struct dt_needed n, nn;
1178 int force;
1179
1180 /* If the lib that needs this one was --as-needed and wasn't
1181 found to be needed, then this lib isn't needed either. */
1182 if (l->by != NULL
1183 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1184 continue;
1185
1186 /* Skip the lib if --no-copy-dt-needed-entries and
1187 --allow-shlib-undefined is in effect. */
1188 if (l->by != NULL
1189 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1190 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1191 continue;
1192
1193 /* If we've already seen this file, skip it. */
1194 for (ll = needed; ll != l; ll = ll->next)
1195 if ((ll->by == NULL
1196 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1197 && strcmp (ll->name, l->name) == 0)
1198 break;
1199 if (ll != l)
1200 continue;
1201
1202 /* See if this file was included in the link explicitly. */
1203 global_needed = l;
1204 global_found = NULL;
1205 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1206 if (global_found != NULL
1207 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1208 & DYN_AS_NEEDED) == 0)
1209 continue;
1210
1211 n.by = l->by;
1212 n.name = l->name;
1213 nn.by = l->by;
1214 if (verbose)
1215 info_msg (_("%s needed by %B\n"), l->name, l->by);
1216
1217 /* As-needed libs specified on the command line (or linker script)
1218 take priority over libs found in search dirs. */
1219 if (global_found != NULL)
1220 {
1221 nn.name = global_found->filename;
1222 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1223 continue;
1224 }
1225
1226 /* We need to find this file and include the symbol table. We
1227 want to search for the file in the same way that the dynamic
1228 linker will search. That means that we want to use
1229 rpath_link, rpath, then the environment variable
1230 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1231 entries (native only), then the linker script LIB_SEARCH_DIRS.
1232 We do not search using the -L arguments.
1233
1234 We search twice. The first time, we skip objects which may
1235 introduce version mismatches. The second time, we force
1236 their use. See gld${EMULATION_NAME}_vercheck comment. */
1237 for (force = 0; force < 2; force++)
1238 {
1239 size_t len;
1240 search_dirs_type *search;
1241 EOF
1242 if [ "x${NATIVE}" = xyes ] ; then
1243 fragment <<EOF
1244 const char *lib_path;
1245 EOF
1246 fi
1247 if [ "x${USE_LIBPATH}" = xyes ] ; then
1248 fragment <<EOF
1249 struct bfd_link_needed_list *rp;
1250 int found;
1251 EOF
1252 fi
1253 fragment <<EOF
1254
1255 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1256 &n, force))
1257 break;
1258 EOF
1259 if [ "x${USE_LIBPATH}" = xyes ] ; then
1260 fragment <<EOF
1261 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1262 &n, force))
1263 break;
1264 EOF
1265 fi
1266 if [ "x${NATIVE}" = xyes ] ; then
1267 fragment <<EOF
1268 if (command_line.rpath_link == NULL
1269 && command_line.rpath == NULL)
1270 {
1271 lib_path = (const char *) getenv ("LD_RUN_PATH");
1272 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1273 force))
1274 break;
1275 }
1276 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1277 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1278 break;
1279 EOF
1280 fi
1281 if [ "x${USE_LIBPATH}" = xyes ] ; then
1282 fragment <<EOF
1283 found = 0;
1284 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1285 for (; !found && rp != NULL; rp = rp->next)
1286 {
1287 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1288 found = (rp->by == l->by
1289 && gld${EMULATION_NAME}_search_needed (tmpname,
1290 &n,
1291 force));
1292 free (tmpname);
1293 }
1294 if (found)
1295 break;
1296
1297 EOF
1298 fi
1299 if [ "x${USE_LIBPATH}" = xyes ] ; then
1300 case ${target} in
1301 *-*-freebsd* | *-*-dragonfly*)
1302 fragment <<EOF
1303 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1304 break;
1305 EOF
1306 # FreeBSD
1307 ;;
1308
1309 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1310 fragment <<EOF
1311 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1312 break;
1313
1314 EOF
1315 # Linux
1316 ;;
1317 esac
1318 fi
1319 fragment <<EOF
1320 len = strlen (l->name);
1321 for (search = search_head; search != NULL; search = search->next)
1322 {
1323 char *filename;
1324
1325 if (search->cmdline)
1326 continue;
1327 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1328 sprintf (filename, "%s/%s", search->name, l->name);
1329 nn.name = filename;
1330 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1331 break;
1332 free (filename);
1333 }
1334 if (search != NULL)
1335 break;
1336 EOF
1337 fragment <<EOF
1338 }
1339
1340 if (force < 2)
1341 continue;
1342
1343 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1344 l->name, l->by);
1345 }
1346 }
1347
1348 EOF
1349 fi
1350
1351 fragment <<EOF
1352
1353 /* Look through an expression for an assignment statement. */
1354
1355 static void
1356 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1357 {
1358 bfd_boolean provide = FALSE;
1359
1360 switch (exp->type.node_class)
1361 {
1362 case etree_provide:
1363 case etree_provided:
1364 provide = TRUE;
1365 /* Fall thru */
1366 case etree_assign:
1367 /* We call record_link_assignment even if the symbol is defined.
1368 This is because if it is defined by a dynamic object, we
1369 actually want to use the value defined by the linker script,
1370 not the value from the dynamic object (because we are setting
1371 symbols like etext). If the symbol is defined by a regular
1372 object, then, as it happens, calling record_link_assignment
1373 will do no harm. */
1374 if (strcmp (exp->assign.dst, ".") != 0)
1375 {
1376 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1377 &link_info,
1378 exp->assign.dst, provide,
1379 exp->assign.hidden))
1380 einfo ("%P%F: failed to record assignment to %s: %E\n",
1381 exp->assign.dst);
1382 }
1383 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1384 break;
1385
1386 case etree_binary:
1387 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1388 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1389 break;
1390
1391 case etree_trinary:
1392 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1393 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1394 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1395 break;
1396
1397 case etree_unary:
1398 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1399 break;
1400
1401 default:
1402 break;
1403 }
1404 }
1405
1406
1407 /* This is called by the before_allocation routine via
1408 lang_for_each_statement. It locates any assignment statements, and
1409 tells the ELF backend about them, in case they are assignments to
1410 symbols which are referred to by dynamic objects. */
1411
1412 static void
1413 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1414 {
1415 if (s->header.type == lang_assignment_statement_enum)
1416 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1417 }
1418
1419 EOF
1420
1421 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1422 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1423 ELF_INTERPRETER_SET_DEFAULT="
1424 if (sinterp != NULL)
1425 {
1426 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1427 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1428 }
1429
1430 "
1431 else
1432 ELF_INTERPRETER_SET_DEFAULT=
1433 fi
1434 fragment <<EOF
1435
1436 /* used by before_allocation and handle_option. */
1437 static void
1438 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1439 {
1440 if (*to == NULL)
1441 *to = xstrdup (op_arg);
1442 else
1443 {
1444 size_t to_len = strlen (*to);
1445 size_t op_arg_len = strlen (op_arg);
1446 char *buf;
1447 char *cp = *to;
1448
1449 /* First see whether OPTARG is already in the path. */
1450 do
1451 {
1452 if (strncmp (op_arg, cp, op_arg_len) == 0
1453 && (cp[op_arg_len] == 0
1454 || cp[op_arg_len] == config.rpath_separator))
1455 /* We found it. */
1456 break;
1457
1458 /* Not yet found. */
1459 cp = strchr (cp, config.rpath_separator);
1460 if (cp != NULL)
1461 ++cp;
1462 }
1463 while (cp != NULL);
1464
1465 if (cp == NULL)
1466 {
1467 buf = xmalloc (to_len + op_arg_len + 2);
1468 sprintf (buf, "%s%c%s", *to,
1469 config.rpath_separator, op_arg);
1470 free (*to);
1471 *to = buf;
1472 }
1473 }
1474 }
1475
1476 /* This is called after the sections have been attached to output
1477 sections, but before any sizes or addresses have been set. */
1478
1479 static void
1480 gld${EMULATION_NAME}_before_allocation (void)
1481 {
1482 const char *rpath;
1483 asection *sinterp;
1484 bfd *abfd;
1485
1486 if (link_info.hash->type == bfd_link_elf_hash_table)
1487 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1488
1489 /* If we are going to make any variable assignments, we need to let
1490 the ELF backend know about them in case the variables are
1491 referred to by dynamic objects. */
1492 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1493
1494 /* Let the ELF backend work out the sizes of any sections required
1495 by dynamic linking. */
1496 rpath = command_line.rpath;
1497 if (rpath == NULL)
1498 rpath = (const char *) getenv ("LD_RUN_PATH");
1499
1500 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1501 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1502 {
1503 const char *audit_libs = elf_dt_audit (abfd);
1504
1505 /* If the input bfd contains an audit entry, we need to add it as
1506 a dep audit entry. */
1507 if (audit_libs && *audit_libs != '\0')
1508 {
1509 char *cp = xstrdup (audit_libs);
1510 do
1511 {
1512 int more = 0;
1513 char *cp2 = strchr (cp, config.rpath_separator);
1514
1515 if (cp2)
1516 {
1517 *cp2 = '\0';
1518 more = 1;
1519 }
1520
1521 if (cp != NULL && *cp != '\0')
1522 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1523
1524 cp = more ? ++cp2 : NULL;
1525 }
1526 while (cp != NULL);
1527 }
1528 }
1529
1530 if (! (bfd_elf_size_dynamic_sections
1531 (link_info.output_bfd, command_line.soname, rpath,
1532 command_line.filter_shlib, audit, depaudit,
1533 (const char * const *) command_line.auxiliary_filters,
1534 &link_info, &sinterp)))
1535 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1536
1537 ${ELF_INTERPRETER_SET_DEFAULT}
1538 /* Let the user override the dynamic linker we are using. */
1539 if (command_line.interpreter != NULL
1540 && sinterp != NULL)
1541 {
1542 sinterp->contents = (bfd_byte *) command_line.interpreter;
1543 sinterp->size = strlen (command_line.interpreter) + 1;
1544 }
1545
1546 /* Look for any sections named .gnu.warning. As a GNU extensions,
1547 we treat such sections as containing warning messages. We print
1548 out the warning message, and then zero out the section size so
1549 that it does not get copied into the output file. */
1550
1551 {
1552 LANG_FOR_EACH_INPUT_STATEMENT (is)
1553 {
1554 asection *s;
1555 bfd_size_type sz;
1556 char *msg;
1557 bfd_boolean ret;
1558
1559 if (is->flags.just_syms)
1560 continue;
1561
1562 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1563 if (s == NULL)
1564 continue;
1565
1566 sz = s->size;
1567 msg = (char *) xmalloc ((size_t) (sz + 1));
1568 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1569 (file_ptr) 0, sz))
1570 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1571 is->the_bfd);
1572 msg[sz] = '\0';
1573 ret = link_info.callbacks->warning (&link_info, msg,
1574 (const char *) NULL,
1575 is->the_bfd, (asection *) NULL,
1576 (bfd_vma) 0);
1577 ASSERT (ret);
1578 free (msg);
1579
1580 /* Clobber the section size, so that we don't waste space
1581 copying the warning into the output file. If we've already
1582 sized the output section, adjust its size. The adjustment
1583 is on rawsize because targets that size sections early will
1584 have called lang_reset_memory_regions after sizing. */
1585 if (s->output_section != NULL
1586 && s->output_section->rawsize >= s->size)
1587 s->output_section->rawsize -= s->size;
1588
1589 s->size = 0;
1590
1591 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1592 warning section don't get copied to the output. */
1593 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1594 }
1595 }
1596
1597 before_allocation_default ();
1598
1599 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1600 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1601 }
1602
1603 EOF
1604 fi
1605
1606 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1607 fragment <<EOF
1608
1609 /* Try to open a dynamic archive. This is where we know that ELF
1610 dynamic libraries have an extension of .so (or .sl on oddball systems
1611 like hpux). */
1612
1613 static bfd_boolean
1614 gld${EMULATION_NAME}_open_dynamic_archive
1615 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1616 {
1617 const char *filename;
1618 char *string;
1619
1620 if (! entry->flags.maybe_archive)
1621 return FALSE;
1622
1623 filename = entry->filename;
1624
1625 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1626 is defined, but it does not seem worth the headache to optimize
1627 away those two bytes of space. */
1628 string = (char *) xmalloc (strlen (search->name)
1629 + strlen (filename)
1630 + strlen (arch)
1631 #ifdef EXTRA_SHLIB_EXTENSION
1632 + strlen (EXTRA_SHLIB_EXTENSION)
1633 #endif
1634 + sizeof "/lib.so");
1635
1636 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1637
1638 #ifdef EXTRA_SHLIB_EXTENSION
1639 /* Try the .so extension first. If that fails build a new filename
1640 using EXTRA_SHLIB_EXTENSION. */
1641 if (! ldfile_try_open_bfd (string, entry))
1642 {
1643 sprintf (string, "%s/lib%s%s%s", search->name,
1644 filename, arch, EXTRA_SHLIB_EXTENSION);
1645 #endif
1646
1647 if (! ldfile_try_open_bfd (string, entry))
1648 {
1649 free (string);
1650 return FALSE;
1651 }
1652 #ifdef EXTRA_SHLIB_EXTENSION
1653 }
1654 #endif
1655
1656 entry->filename = string;
1657
1658 /* We have found a dynamic object to include in the link. The ELF
1659 backend linker will create a DT_NEEDED entry in the .dynamic
1660 section naming this file. If this file includes a DT_SONAME
1661 entry, it will be used. Otherwise, the ELF linker will just use
1662 the name of the file. For an archive found by searching, like
1663 this one, the DT_NEEDED entry should consist of just the name of
1664 the file, without the path information used to find it. Note
1665 that we only need to do this if we have a dynamic object; an
1666 archive will never be referenced by a DT_NEEDED entry.
1667
1668 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1669 very pretty. I haven't been able to think of anything that is
1670 pretty, though. */
1671 if (bfd_check_format (entry->the_bfd, bfd_object)
1672 && (entry->the_bfd->flags & DYNAMIC) != 0)
1673 {
1674 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1675
1676 /* Rather than duplicating the logic above. Just use the
1677 filename we recorded earlier. */
1678
1679 filename = lbasename (entry->filename);
1680 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1681 }
1682
1683 return TRUE;
1684 }
1685
1686 EOF
1687 fi
1688
1689 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1690 fragment <<EOF
1691
1692 /* A variant of lang_output_section_find used by place_orphan. */
1693
1694 static lang_output_section_statement_type *
1695 output_rel_find (asection *sec, int isdyn)
1696 {
1697 lang_output_section_statement_type *lookup;
1698 lang_output_section_statement_type *last = NULL;
1699 lang_output_section_statement_type *last_alloc = NULL;
1700 lang_output_section_statement_type *last_ro_alloc = NULL;
1701 lang_output_section_statement_type *last_rel = NULL;
1702 lang_output_section_statement_type *last_rel_alloc = NULL;
1703 int rela = sec->name[4] == 'a';
1704
1705 for (lookup = &lang_output_section_statement.head->output_section_statement;
1706 lookup != NULL;
1707 lookup = lookup->next)
1708 {
1709 if (lookup->constraint >= 0
1710 && CONST_STRNEQ (lookup->name, ".rel"))
1711 {
1712 int lookrela = lookup->name[4] == 'a';
1713
1714 /* .rel.dyn must come before all other reloc sections, to suit
1715 GNU ld.so. */
1716 if (isdyn)
1717 break;
1718
1719 /* Don't place after .rel.plt as doing so results in wrong
1720 dynamic tags. */
1721 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1722 break;
1723
1724 if (rela == lookrela || last_rel == NULL)
1725 last_rel = lookup;
1726 if ((rela == lookrela || last_rel_alloc == NULL)
1727 && lookup->bfd_section != NULL
1728 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1729 last_rel_alloc = lookup;
1730 }
1731
1732 last = lookup;
1733 if (lookup->bfd_section != NULL
1734 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1735 {
1736 last_alloc = lookup;
1737 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1738 last_ro_alloc = lookup;
1739 }
1740 }
1741
1742 if (last_rel_alloc)
1743 return last_rel_alloc;
1744
1745 if (last_rel)
1746 return last_rel;
1747
1748 if (last_ro_alloc)
1749 return last_ro_alloc;
1750
1751 if (last_alloc)
1752 return last_alloc;
1753
1754 return last;
1755 }
1756
1757 /* Place an orphan section. We use this to put random SHF_ALLOC
1758 sections in the right segment. */
1759
1760 static lang_output_section_statement_type *
1761 gld${EMULATION_NAME}_place_orphan (asection *s,
1762 const char *secname,
1763 int constraint)
1764 {
1765 static struct orphan_save hold[] =
1766 {
1767 { ".text",
1768 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1769 0, 0, 0, 0 },
1770 { ".rodata",
1771 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1772 0, 0, 0, 0 },
1773 { ".data",
1774 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1775 0, 0, 0, 0 },
1776 { ".bss",
1777 SEC_ALLOC,
1778 0, 0, 0, 0 },
1779 { 0,
1780 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1781 0, 0, 0, 0 },
1782 { ".interp",
1783 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1784 0, 0, 0, 0 },
1785 { ".sdata",
1786 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1787 0, 0, 0, 0 },
1788 { ".comment",
1789 SEC_HAS_CONTENTS,
1790 0, 0, 0, 0 },
1791 };
1792 enum orphan_save_index
1793 {
1794 orphan_text = 0,
1795 orphan_rodata,
1796 orphan_data,
1797 orphan_bss,
1798 orphan_rel,
1799 orphan_interp,
1800 orphan_sdata,
1801 orphan_nonalloc
1802 };
1803 static int orphan_init_done = 0;
1804 struct orphan_save *place;
1805 lang_output_section_statement_type *after;
1806 lang_output_section_statement_type *os;
1807 lang_output_section_statement_type *match_by_name = NULL;
1808 int isdyn = 0;
1809 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1810 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1811
1812 if (! link_info.relocatable
1813 && link_info.combreloc
1814 && (s->flags & SEC_ALLOC))
1815 {
1816 if (iself)
1817 switch (sh_type)
1818 {
1819 case SHT_RELA:
1820 secname = ".rela.dyn";
1821 isdyn = 1;
1822 break;
1823 case SHT_REL:
1824 secname = ".rel.dyn";
1825 isdyn = 1;
1826 break;
1827 default:
1828 break;
1829 }
1830 else if (CONST_STRNEQ (secname, ".rel"))
1831 {
1832 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1833 isdyn = 1;
1834 }
1835 }
1836
1837 /* Look through the script to see where to place this section. */
1838 if (constraint == 0)
1839 for (os = lang_output_section_find (secname);
1840 os != NULL;
1841 os = next_matching_output_section_statement (os, 0))
1842 {
1843 /* If we don't match an existing output section, tell
1844 lang_insert_orphan to create a new output section. */
1845 constraint = SPECIAL;
1846
1847 if (os->bfd_section != NULL
1848 && (os->bfd_section->flags == 0
1849 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1850 os->bfd_section,
1851 s->owner, s)
1852 && ((s->flags ^ os->bfd_section->flags)
1853 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1854 {
1855 /* We already have an output section statement with this
1856 name, and its bfd section has compatible flags.
1857 If the section already exists but does not have any flags
1858 set, then it has been created by the linker, probably as a
1859 result of a --section-start command line switch. */
1860 lang_add_section (&os->children, s, NULL, os);
1861 return os;
1862 }
1863
1864 /* Save unused output sections in case we can match them
1865 against orphans later. */
1866 if (os->bfd_section == NULL)
1867 match_by_name = os;
1868 }
1869
1870 /* If we didn't match an active output section, see if we matched an
1871 unused one and use that. */
1872 if (match_by_name)
1873 {
1874 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1875 return match_by_name;
1876 }
1877
1878 if (!orphan_init_done)
1879 {
1880 struct orphan_save *ho;
1881
1882 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1883 if (ho->name != NULL)
1884 {
1885 ho->os = lang_output_section_find (ho->name);
1886 if (ho->os != NULL && ho->os->flags == 0)
1887 ho->os->flags = ho->flags;
1888 }
1889 orphan_init_done = 1;
1890 }
1891
1892 /* If this is a final link, then always put .gnu.warning.SYMBOL
1893 sections into the .text section to get them out of the way. */
1894 if (link_info.executable
1895 && ! link_info.relocatable
1896 && CONST_STRNEQ (s->name, ".gnu.warning.")
1897 && hold[orphan_text].os != NULL)
1898 {
1899 os = hold[orphan_text].os;
1900 lang_add_section (&os->children, s, NULL, os);
1901 return os;
1902 }
1903
1904 /* Decide which segment the section should go in based on the
1905 section name and section flags. We put loadable .note sections
1906 right after the .interp section, so that the PT_NOTE segment is
1907 stored right after the program headers where the OS can read it
1908 in the first page. */
1909
1910 place = NULL;
1911 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1912 place = &hold[orphan_nonalloc];
1913 else if ((s->flags & SEC_ALLOC) == 0)
1914 ;
1915 else if ((s->flags & SEC_LOAD) != 0
1916 && ((iself && sh_type == SHT_NOTE)
1917 || (!iself && CONST_STRNEQ (secname, ".note"))))
1918 place = &hold[orphan_interp];
1919 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1920 place = &hold[orphan_bss];
1921 else if ((s->flags & SEC_SMALL_DATA) != 0)
1922 place = &hold[orphan_sdata];
1923 else if ((s->flags & SEC_READONLY) == 0)
1924 place = &hold[orphan_data];
1925 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1926 || (!iself && CONST_STRNEQ (secname, ".rel")))
1927 && (s->flags & SEC_LOAD) != 0)
1928 place = &hold[orphan_rel];
1929 else if ((s->flags & SEC_CODE) == 0)
1930 place = &hold[orphan_rodata];
1931 else
1932 place = &hold[orphan_text];
1933
1934 after = NULL;
1935 if (place != NULL)
1936 {
1937 if (place->os == NULL)
1938 {
1939 if (place->name != NULL)
1940 place->os = lang_output_section_find (place->name);
1941 else
1942 place->os = output_rel_find (s, isdyn);
1943 }
1944 after = place->os;
1945 if (after == NULL)
1946 after = lang_output_section_find_by_flags
1947 (s, &place->os, _bfd_elf_match_sections_by_type);
1948 if (after == NULL)
1949 /* *ABS* is always the first output section statement. */
1950 after = &lang_output_section_statement.head->output_section_statement;
1951 }
1952
1953 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1954 }
1955 EOF
1956 fi
1957
1958 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1959 fragment <<EOF
1960
1961 static void
1962 gld${EMULATION_NAME}_after_allocation (void)
1963 {
1964 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1965 &link_info);
1966 gld${EMULATION_NAME}_map_segments (need_layout);
1967 }
1968 EOF
1969 fi
1970
1971 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1972 fragment <<EOF
1973
1974 static char *
1975 gld${EMULATION_NAME}_get_script (int *isfile)
1976 EOF
1977
1978 if test -n "$COMPILE_IN"
1979 then
1980 # Scripts compiled in.
1981
1982 # sed commands to quote an ld script as a C string.
1983 sc="-f stringify.sed"
1984
1985 fragment <<EOF
1986 {
1987 *isfile = 0;
1988
1989 if (link_info.relocatable && config.build_constructors)
1990 return
1991 EOF
1992 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1993 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1994 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1995 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1996 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1997 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1998 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1999 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2000 fi
2001 if test -n "$GENERATE_PIE_SCRIPT" ; then
2002 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2003 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2004 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2005 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2006 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2007 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2008 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2009 fi
2010 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2011 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2012 fi
2013 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2014 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2015 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2016 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2017 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2018 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2019 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2020 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2021 fi
2022 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2023 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2024 fi
2025 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2026 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2027 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2028 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2029 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2030 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2031 fi
2032 echo ' ; else return' >> e${EMULATION_NAME}.c
2033 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2034 echo '; }' >> e${EMULATION_NAME}.c
2035
2036 else
2037 # Scripts read from the filesystem.
2038
2039 fragment <<EOF
2040 {
2041 *isfile = 1;
2042
2043 if (link_info.relocatable && config.build_constructors)
2044 return "ldscripts/${EMULATION_NAME}.xu";
2045 else if (link_info.relocatable)
2046 return "ldscripts/${EMULATION_NAME}.xr";
2047 else if (!config.text_read_only)
2048 return "ldscripts/${EMULATION_NAME}.xbn";
2049 EOF
2050 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2051 else
2052 fragment <<EOF
2053 else if (!config.magic_demand_paged)
2054 return "ldscripts/${EMULATION_NAME}.xn";
2055 EOF
2056 fi
2057 if test -n "$GENERATE_PIE_SCRIPT" ; then
2058 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2059 fragment <<EOF
2060 else if (link_info.pie && link_info.combreloc
2061 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2062 return "ldscripts/${EMULATION_NAME}.xdw";
2063 else if (link_info.pie && link_info.combreloc)
2064 return "ldscripts/${EMULATION_NAME}.xdc";
2065 EOF
2066 fi
2067 fragment <<EOF
2068 else if (link_info.pie)
2069 return "ldscripts/${EMULATION_NAME}.xd";
2070 EOF
2071 fi
2072 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2073 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2074 fragment <<EOF
2075 else if (link_info.shared && link_info.combreloc
2076 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2077 return "ldscripts/${EMULATION_NAME}.xsw";
2078 else if (link_info.shared && link_info.combreloc)
2079 return "ldscripts/${EMULATION_NAME}.xsc";
2080 EOF
2081 fi
2082 fragment <<EOF
2083 else if (link_info.shared)
2084 return "ldscripts/${EMULATION_NAME}.xs";
2085 EOF
2086 fi
2087 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2088 fragment <<EOF
2089 else if (link_info.combreloc && link_info.relro
2090 && (link_info.flags & DF_BIND_NOW))
2091 return "ldscripts/${EMULATION_NAME}.xw";
2092 else if (link_info.combreloc)
2093 return "ldscripts/${EMULATION_NAME}.xc";
2094 EOF
2095 fi
2096 fragment <<EOF
2097 else
2098 return "ldscripts/${EMULATION_NAME}.x";
2099 }
2100
2101 EOF
2102 fi
2103 fi
2104
2105 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2106 fragment <<EOF
2107 $PARSE_AND_LIST_PROLOGUE
2108 EOF
2109 fi
2110
2111 fragment <<EOF
2112
2113 #define OPTION_DISABLE_NEW_DTAGS (400)
2114 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2115 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2116 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2117 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2118 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2119 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2120 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2121
2122 static void
2123 gld${EMULATION_NAME}_add_options
2124 (int ns, char **shortopts, int nl, struct option **longopts,
2125 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2126 {
2127 EOF
2128 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2129 fragment <<EOF
2130 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2131 EOF
2132 else
2133 fragment <<EOF
2134 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2135 EOF
2136 fi
2137 fragment <<EOF
2138 static const struct option xtra_long[] = {
2139 EOF
2140 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2141 fragment <<EOF
2142 {"audit", required_argument, NULL, OPTION_AUDIT},
2143 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2144 EOF
2145 fi
2146 fragment <<EOF
2147 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2148 EOF
2149 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2150 fragment <<EOF
2151 {"depaudit", required_argument, NULL, 'P'},
2152 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2153 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2154 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2155 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2156 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2157 EOF
2158 fi
2159 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2160 fragment <<EOF
2161 $PARSE_AND_LIST_LONGOPTS
2162 EOF
2163 fi
2164 fragment <<EOF
2165 {NULL, no_argument, NULL, 0}
2166 };
2167
2168 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2169 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2170 *longopts = (struct option *)
2171 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2172 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2173 }
2174
2175 #define DEFAULT_BUILD_ID_STYLE "sha1"
2176
2177 static bfd_boolean
2178 gld${EMULATION_NAME}_handle_option (int optc)
2179 {
2180 switch (optc)
2181 {
2182 default:
2183 return FALSE;
2184
2185 case OPTION_BUILD_ID:
2186 if (emit_note_gnu_build_id != NULL)
2187 {
2188 free ((char *) emit_note_gnu_build_id);
2189 emit_note_gnu_build_id = NULL;
2190 }
2191 if (optarg == NULL)
2192 optarg = DEFAULT_BUILD_ID_STYLE;
2193 if (strcmp (optarg, "none"))
2194 emit_note_gnu_build_id = xstrdup (optarg);
2195 break;
2196
2197 EOF
2198
2199 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2200 fragment <<EOF
2201 case OPTION_AUDIT:
2202 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2203 break;
2204
2205 case 'P':
2206 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2207 break;
2208
2209 case OPTION_DISABLE_NEW_DTAGS:
2210 link_info.new_dtags = FALSE;
2211 break;
2212
2213 case OPTION_ENABLE_NEW_DTAGS:
2214 link_info.new_dtags = TRUE;
2215 break;
2216
2217 case OPTION_EH_FRAME_HDR:
2218 link_info.eh_frame_hdr = TRUE;
2219 break;
2220
2221 case OPTION_GROUP:
2222 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2223 /* Groups must be self-contained. */
2224 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2225 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2226 break;
2227
2228 case OPTION_EXCLUDE_LIBS:
2229 add_excluded_libs (optarg);
2230 break;
2231
2232 case OPTION_HASH_STYLE:
2233 link_info.emit_hash = FALSE;
2234 link_info.emit_gnu_hash = FALSE;
2235 if (strcmp (optarg, "sysv") == 0)
2236 link_info.emit_hash = TRUE;
2237 else if (strcmp (optarg, "gnu") == 0)
2238 link_info.emit_gnu_hash = TRUE;
2239 else if (strcmp (optarg, "both") == 0)
2240 {
2241 link_info.emit_hash = TRUE;
2242 link_info.emit_gnu_hash = TRUE;
2243 }
2244 else
2245 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2246 break;
2247
2248 EOF
2249 fi
2250 fragment <<EOF
2251 case 'z':
2252 if (strcmp (optarg, "defs") == 0)
2253 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2254 else if (strcmp (optarg, "muldefs") == 0)
2255 link_info.allow_multiple_definition = TRUE;
2256 else if (CONST_STRNEQ (optarg, "max-page-size="))
2257 {
2258 char *end;
2259
2260 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2261 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2262 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2263 optarg + 14);
2264 }
2265 else if (CONST_STRNEQ (optarg, "common-page-size="))
2266 {
2267 char *end;
2268 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2269 if (*end
2270 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2271 einfo (_("%P%F: invalid common page size \`%s'\n"),
2272 optarg + 17);
2273 }
2274 else if (CONST_STRNEQ (optarg, "stack-size="))
2275 {
2276 char *end;
2277 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2278 if (*end || link_info.stacksize < 0)
2279 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2280 if (!link_info.stacksize)
2281 /* Use -1 for explicit no-stack, because zero means
2282 'default'. */
2283 link_info.stacksize = -1;
2284 }
2285 else if (strcmp (optarg, "execstack") == 0)
2286 {
2287 link_info.execstack = TRUE;
2288 link_info.noexecstack = FALSE;
2289 }
2290 else if (strcmp (optarg, "noexecstack") == 0)
2291 {
2292 link_info.noexecstack = TRUE;
2293 link_info.execstack = FALSE;
2294 }
2295 EOF
2296 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2297 fragment <<EOF
2298 else if (strcmp (optarg, "global") == 0)
2299 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2300 else if (strcmp (optarg, "initfirst") == 0)
2301 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2302 else if (strcmp (optarg, "interpose") == 0)
2303 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2304 else if (strcmp (optarg, "loadfltr") == 0)
2305 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2306 else if (strcmp (optarg, "nodefaultlib") == 0)
2307 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2308 else if (strcmp (optarg, "nodelete") == 0)
2309 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2310 else if (strcmp (optarg, "nodlopen") == 0)
2311 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2312 else if (strcmp (optarg, "nodump") == 0)
2313 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2314 else if (strcmp (optarg, "now") == 0)
2315 {
2316 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2317 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2318 }
2319 else if (strcmp (optarg, "lazy") == 0)
2320 {
2321 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2322 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2323 }
2324 else if (strcmp (optarg, "origin") == 0)
2325 {
2326 link_info.flags |= (bfd_vma) DF_ORIGIN;
2327 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2328 }
2329 else if (strcmp (optarg, "combreloc") == 0)
2330 link_info.combreloc = TRUE;
2331 else if (strcmp (optarg, "nocombreloc") == 0)
2332 link_info.combreloc = FALSE;
2333 else if (strcmp (optarg, "nocopyreloc") == 0)
2334 link_info.nocopyreloc = TRUE;
2335 else if (strcmp (optarg, "relro") == 0)
2336 link_info.relro = TRUE;
2337 else if (strcmp (optarg, "norelro") == 0)
2338 link_info.relro = FALSE;
2339 else if (strcmp (optarg, "text") == 0)
2340 link_info.error_textrel = TRUE;
2341 else if (strcmp (optarg, "notext") == 0)
2342 link_info.error_textrel = FALSE;
2343 else if (strcmp (optarg, "textoff") == 0)
2344 link_info.error_textrel = FALSE;
2345 EOF
2346 fi
2347
2348 fragment <<EOF
2349 else
2350 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2351 break;
2352 EOF
2353
2354 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2355 fragment <<EOF
2356 $PARSE_AND_LIST_ARGS_CASES
2357 EOF
2358 fi
2359
2360 fragment <<EOF
2361 }
2362
2363 return TRUE;
2364 }
2365
2366 EOF
2367
2368 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2369 fragment <<EOF
2370
2371 static void
2372 gld${EMULATION_NAME}_list_options (FILE * file)
2373 {
2374 EOF
2375 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2376 fragment <<EOF
2377 fprintf (file, _("\
2378 --audit=AUDITLIB Specify a library to use for auditing\n"));
2379 fprintf (file, _("\
2380 -Bgroup Selects group name lookup rules for DSO\n"));
2381 EOF
2382 fi
2383 fragment <<EOF
2384 fprintf (file, _("\
2385 --build-id[=STYLE] Generate build ID note\n"));
2386 EOF
2387 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2388 fragment <<EOF
2389 fprintf (file, _("\
2390 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2391 Specify a library to use for auditing dependencies\n"));
2392 fprintf (file, _("\
2393 --disable-new-dtags Disable new dynamic tags\n"));
2394 fprintf (file, _("\
2395 --enable-new-dtags Enable new dynamic tags\n"));
2396 fprintf (file, _("\
2397 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2398 fprintf (file, _("\
2399 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2400 fprintf (file, _("\
2401 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2402 fprintf (file, _("\
2403 -z combreloc Merge dynamic relocs into one section and sort\n"));
2404 EOF
2405 fi
2406
2407 fragment <<EOF
2408 fprintf (file, _("\
2409 -z common-page-size=SIZE Set common page size to SIZE\n"));
2410 fprintf (file, _("\
2411 -z defs Report unresolved symbols in object files.\n"));
2412 fprintf (file, _("\
2413 -z execstack Mark executable as requiring executable stack\n"));
2414 EOF
2415
2416 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2417 fragment <<EOF
2418 fprintf (file, _("\
2419 -z global Make symbols in DSO available for subsequently\n\
2420 loaded objects\n"));
2421 fprintf (file, _("\
2422 -z initfirst Mark DSO to be initialized first at runtime\n"));
2423 fprintf (file, _("\
2424 -z interpose Mark object to interpose all DSOs but executable\n"));
2425 fprintf (file, _("\
2426 -z lazy Mark object lazy runtime binding (default)\n"));
2427 fprintf (file, _("\
2428 -z loadfltr Mark object requiring immediate process\n"));
2429 EOF
2430 fi
2431
2432 fragment <<EOF
2433 fprintf (file, _("\
2434 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2435 fprintf (file, _("\
2436 -z muldefs Allow multiple definitions\n"));
2437 EOF
2438
2439 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2440 fragment <<EOF
2441 fprintf (file, _("\
2442 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2443 fprintf (file, _("\
2444 -z nocopyreloc Don't create copy relocs\n"));
2445 fprintf (file, _("\
2446 -z nodefaultlib Mark object not to use default search paths\n"));
2447 fprintf (file, _("\
2448 -z nodelete Mark DSO non-deletable at runtime\n"));
2449 fprintf (file, _("\
2450 -z nodlopen Mark DSO not available to dlopen\n"));
2451 fprintf (file, _("\
2452 -z nodump Mark DSO not available to dldump\n"));
2453 EOF
2454 fi
2455 fragment <<EOF
2456 fprintf (file, _("\
2457 -z noexecstack Mark executable as not requiring executable stack\n"));
2458 EOF
2459 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2460 fragment <<EOF
2461 fprintf (file, _("\
2462 -z norelro Don't create RELRO program header\n"));
2463 fprintf (file, _("\
2464 -z now Mark object non-lazy runtime binding\n"));
2465 fprintf (file, _("\
2466 -z origin Mark object requiring immediate \$ORIGIN\n\
2467 processing at runtime\n"));
2468 fprintf (file, _("\
2469 -z relro Create RELRO program header\n"));
2470 fprintf (file, _("\
2471 -z stacksize=SIZE Set size of stack segment\n"));
2472 EOF
2473 fi
2474
2475 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2476 fragment <<EOF
2477 $PARSE_AND_LIST_OPTIONS
2478 EOF
2479 fi
2480
2481 fragment <<EOF
2482 }
2483 EOF
2484
2485 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2486 fragment <<EOF
2487 $PARSE_AND_LIST_EPILOGUE
2488 EOF
2489 fi
2490 fi
2491
2492 fragment <<EOF
2493
2494 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2495 {
2496 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2497 ${LDEMUL_SYSLIB-syslib_default},
2498 ${LDEMUL_HLL-hll_default},
2499 ${LDEMUL_AFTER_PARSE-after_parse_default},
2500 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2501 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2502 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2503 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2504 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2505 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2506 "${EMULATION_NAME}",
2507 "${OUTPUT_FORMAT}",
2508 ${LDEMUL_FINISH-finish_default},
2509 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2510 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2511 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2512 ${LDEMUL_SET_SYMBOLS-NULL},
2513 ${LDEMUL_PARSE_ARGS-NULL},
2514 gld${EMULATION_NAME}_add_options,
2515 gld${EMULATION_NAME}_handle_option,
2516 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2517 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2518 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2519 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2520 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2521 };
2522 EOF