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