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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 ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
17 Free Software Foundation, Inc.
18 Written by Steve Chamberlain <sac@cygnus.com>
19 ELF support by Ian Lance Taylor <ian@cygnus.com>
20
21 This file is part of the GNU Binutils.
22
23 This program is free software; you can redistribute it and/or modify
24 it under the terms of the GNU General Public License as published by
25 the Free Software Foundation; either version 3 of the License, or
26 (at your option) any later version.
27
28 This program is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
32
33 You should have received a copy of the GNU General Public License
34 along with this program; if not, write to the Free Software
35 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
36 MA 02110-1301, USA. */
37
38 #define TARGET_IS_${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*-*)
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 config.dynamic_link = ${DYNAMIC_LINK-TRUE};
106 config.has_shared = `if test -n "$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->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->add_DT_NEEDED_for_dynamic)
131 link_class |= DYN_NO_ADD_NEEDED;
132
133 if (entry->just_syms_flag
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 ${target} in
377 *-*-linux-* | *-*-k*bsd*-*)
378 fragment <<EOF
379 {
380 struct bfd_link_needed_list *l;
381
382 for (l = needs; l != NULL; l = l->next)
383 if (CONST_STRNEQ (l->name, "libc.so"))
384 break;
385 if (l == NULL)
386 {
387 bfd_close (abfd);
388 return FALSE;
389 }
390 }
391
392 EOF
393 ;;
394 esac
395 fragment <<EOF
396 }
397 }
398
399 /* We've found a dynamic object matching the DT_NEEDED entry. */
400
401 /* We have already checked that there is no other input file of the
402 same name. We must now check again that we are not including the
403 same file twice. We need to do this because on many systems
404 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
405 reference libc.so.1. If we have already included libc.so, we
406 don't want to include libc.so.1 if they are the same file, and we
407 can only check that using stat. */
408
409 if (bfd_stat (abfd, &global_stat) != 0)
410 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
411
412 /* First strip off everything before the last '/'. */
413 soname = lbasename (abfd->filename);
414
415 if (trace_file_tries)
416 info_msg (_("found %s at %s\n"), soname, name);
417
418 global_found = NULL;
419 lang_for_each_input_file (gld${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*-*)
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->search_dirs_flag)
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 warn_eh_frame
1146 = (s
1147 && s->size > 8
1148 && !bfd_is_abs_section (s->output_section));
1149 }
1150 if (elfbfd && warn_eh_frame)
1151 break;
1152 }
1153 if (elfbfd)
1154 {
1155 const struct elf_backend_data *bed;
1156
1157 bed = get_elf_backend_data (elfbfd);
1158 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1159 bed->dynamic_sec_flags
1160 | SEC_READONLY);
1161 if (s != NULL
1162 && bfd_set_section_alignment (elfbfd, s, 2))
1163 {
1164 htab->eh_info.hdr_sec = s;
1165 warn_eh_frame = FALSE;
1166 }
1167 }
1168 if (warn_eh_frame)
1169 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1170 " --eh-frame-hdr ignored.\n");
1171 }
1172
1173 /* Get the list of files which appear in DT_NEEDED entries in
1174 dynamic objects included in the link (often there will be none).
1175 For each such file, we want to track down the corresponding
1176 library, and include the symbol table in the link. This is what
1177 the runtime dynamic linker will do. Tracking the files down here
1178 permits one dynamic object to include another without requiring
1179 special action by the person doing the link. Note that the
1180 needed list can actually grow while we are stepping through this
1181 loop. */
1182 if (!link_info.executable)
1183 return;
1184 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1185 for (l = needed; l != NULL; l = l->next)
1186 {
1187 struct bfd_link_needed_list *ll;
1188 struct dt_needed n, nn;
1189 int force;
1190
1191 /* If the lib that needs this one was --as-needed and wasn't
1192 found to be needed, then this lib isn't needed either. */
1193 if (l->by != NULL
1194 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1195 continue;
1196
1197 /* If we've already seen this file, skip it. */
1198 for (ll = needed; ll != l; ll = ll->next)
1199 if ((ll->by == NULL
1200 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1201 && strcmp (ll->name, l->name) == 0)
1202 break;
1203 if (ll != l)
1204 continue;
1205
1206 /* See if this file was included in the link explicitly. */
1207 global_needed = l;
1208 global_found = NULL;
1209 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1210 if (global_found != NULL
1211 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1212 & DYN_AS_NEEDED) == 0)
1213 continue;
1214
1215 n.by = l->by;
1216 n.name = l->name;
1217 nn.by = l->by;
1218 if (trace_file_tries)
1219 info_msg (_("%s needed by %B\n"), l->name, l->by);
1220
1221 /* As-needed libs specified on the command line (or linker script)
1222 take priority over libs found in search dirs. */
1223 if (global_found != NULL)
1224 {
1225 nn.name = global_found->filename;
1226 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1227 continue;
1228 }
1229
1230 /* We need to find this file and include the symbol table. We
1231 want to search for the file in the same way that the dynamic
1232 linker will search. That means that we want to use
1233 rpath_link, rpath, then the environment variable
1234 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1235 entries (native only), then the linker script LIB_SEARCH_DIRS.
1236 We do not search using the -L arguments.
1237
1238 We search twice. The first time, we skip objects which may
1239 introduce version mismatches. The second time, we force
1240 their use. See gld${EMULATION_NAME}_vercheck comment. */
1241 for (force = 0; force < 2; force++)
1242 {
1243 size_t len;
1244 search_dirs_type *search;
1245 EOF
1246 if [ "x${NATIVE}" = xyes ] ; then
1247 fragment <<EOF
1248 const char *lib_path;
1249 EOF
1250 fi
1251 if [ "x${USE_LIBPATH}" = xyes ] ; then
1252 fragment <<EOF
1253 struct bfd_link_needed_list *rp;
1254 int found;
1255 EOF
1256 fi
1257 fragment <<EOF
1258
1259 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1260 &n, force))
1261 break;
1262 EOF
1263 if [ "x${USE_LIBPATH}" = xyes ] ; then
1264 fragment <<EOF
1265 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1266 &n, force))
1267 break;
1268 EOF
1269 fi
1270 if [ "x${NATIVE}" = xyes ] ; then
1271 fragment <<EOF
1272 if (command_line.rpath_link == NULL
1273 && command_line.rpath == NULL)
1274 {
1275 lib_path = (const char *) getenv ("LD_RUN_PATH");
1276 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1277 force))
1278 break;
1279 }
1280 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1281 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1282 break;
1283 EOF
1284 fi
1285 if [ "x${USE_LIBPATH}" = xyes ] ; then
1286 fragment <<EOF
1287 found = 0;
1288 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1289 for (; !found && rp != NULL; rp = rp->next)
1290 {
1291 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1292 found = (rp->by == l->by
1293 && gld${EMULATION_NAME}_search_needed (tmpname,
1294 &n,
1295 force));
1296 free (tmpname);
1297 }
1298 if (found)
1299 break;
1300
1301 EOF
1302 fi
1303 if [ "x${USE_LIBPATH}" = xyes ] ; then
1304 case ${target} in
1305 *-*-freebsd* | *-*-dragonfly*)
1306 fragment <<EOF
1307 if (gld${EMULATION_NAME}_check_ld_elf_hints (l->name, force))
1308 break;
1309 EOF
1310 # FreeBSD
1311 ;;
1312
1313 *-*-linux-* | *-*-k*bsd*-*)
1314 # Linux
1315 fragment <<EOF
1316 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
1317 break;
1318
1319 EOF
1320 ;;
1321 esac
1322 fi
1323 fragment <<EOF
1324 len = strlen (l->name);
1325 for (search = search_head; search != NULL; search = search->next)
1326 {
1327 char *filename;
1328
1329 if (search->cmdline)
1330 continue;
1331 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1332 sprintf (filename, "%s/%s", search->name, l->name);
1333 nn.name = filename;
1334 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1335 break;
1336 free (filename);
1337 }
1338 if (search != NULL)
1339 break;
1340 EOF
1341 fragment <<EOF
1342 }
1343
1344 if (force < 2)
1345 continue;
1346
1347 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1348 l->name, l->by);
1349 }
1350 }
1351
1352 EOF
1353 fi
1354
1355 fragment <<EOF
1356
1357 /* Look through an expression for an assignment statement. */
1358
1359 static void
1360 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1361 {
1362 bfd_boolean provide = FALSE;
1363
1364 switch (exp->type.node_class)
1365 {
1366 case etree_provide:
1367 case etree_provided:
1368 provide = TRUE;
1369 /* Fall thru */
1370 case etree_assign:
1371 /* We call record_link_assignment even if the symbol is defined.
1372 This is because if it is defined by a dynamic object, we
1373 actually want to use the value defined by the linker script,
1374 not the value from the dynamic object (because we are setting
1375 symbols like etext). If the symbol is defined by a regular
1376 object, then, as it happens, calling record_link_assignment
1377 will do no harm. */
1378 if (strcmp (exp->assign.dst, ".") != 0)
1379 {
1380 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1381 &link_info,
1382 exp->assign.dst, provide,
1383 exp->assign.hidden))
1384 einfo ("%P%F: failed to record assignment to %s: %E\n",
1385 exp->assign.dst);
1386 }
1387 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1388 break;
1389
1390 case etree_binary:
1391 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1392 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1393 break;
1394
1395 case etree_trinary:
1396 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1397 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1398 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1399 break;
1400
1401 case etree_unary:
1402 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1403 break;
1404
1405 default:
1406 break;
1407 }
1408 }
1409
1410
1411 /* This is called by the before_allocation routine via
1412 lang_for_each_statement. It locates any assignment statements, and
1413 tells the ELF backend about them, in case they are assignments to
1414 symbols which are referred to by dynamic objects. */
1415
1416 static void
1417 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1418 {
1419 if (s->header.type == lang_assignment_statement_enum)
1420 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1421 }
1422
1423 EOF
1424
1425 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1426 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1427 ELF_INTERPRETER_SET_DEFAULT="
1428 if (sinterp != NULL)
1429 {
1430 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1431 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1432 }
1433
1434 "
1435 else
1436 ELF_INTERPRETER_SET_DEFAULT=
1437 fi
1438 fragment <<EOF
1439
1440 /* used by before_allocation and handle_option. */
1441 static void
1442 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1443 {
1444 if (*to == NULL)
1445 *to = xstrdup (op_arg);
1446 else
1447 {
1448 size_t to_len = strlen (*to);
1449 size_t op_arg_len = strlen (op_arg);
1450 char *buf;
1451 char *cp = *to;
1452
1453 /* First see whether OPTARG is already in the path. */
1454 do
1455 {
1456 if (strncmp (op_arg, cp, op_arg_len) == 0
1457 && (cp[op_arg_len] == 0
1458 || cp[op_arg_len] == config.rpath_separator))
1459 /* We found it. */
1460 break;
1461
1462 /* Not yet found. */
1463 cp = strchr (cp, config.rpath_separator);
1464 if (cp != NULL)
1465 ++cp;
1466 }
1467 while (cp != NULL);
1468
1469 if (cp == NULL)
1470 {
1471 buf = xmalloc (to_len + op_arg_len + 2);
1472 sprintf (buf, "%s%c%s", *to,
1473 config.rpath_separator, op_arg);
1474 free (*to);
1475 *to = buf;
1476 }
1477 }
1478 }
1479
1480 /* This is called after the sections have been attached to output
1481 sections, but before any sizes or addresses have been set. */
1482
1483 static void
1484 gld${EMULATION_NAME}_before_allocation (void)
1485 {
1486 const char *rpath;
1487 asection *sinterp;
1488 bfd *abfd;
1489
1490 if (link_info.hash->type == bfd_link_elf_hash_table)
1491 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1492
1493 /* If we are going to make any variable assignments, we need to let
1494 the ELF backend know about them in case the variables are
1495 referred to by dynamic objects. */
1496 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1497
1498 /* Let the ELF backend work out the sizes of any sections required
1499 by dynamic linking. */
1500 rpath = command_line.rpath;
1501 if (rpath == NULL)
1502 rpath = (const char *) getenv ("LD_RUN_PATH");
1503
1504 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1505 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1506 {
1507 const char *audit_libs = elf_dt_audit (abfd);
1508
1509 /* If the input bfd contains an audit entry, we need to add it as
1510 a dep audit entry. */
1511 if (audit_libs && *audit_libs != '\0')
1512 {
1513 char *cp = xstrdup (audit_libs);
1514 do
1515 {
1516 int more = 0;
1517 char *cp2 = strchr (cp, config.rpath_separator);
1518
1519 if (cp2)
1520 {
1521 *cp2 = '\0';
1522 more = 1;
1523 }
1524
1525 if (cp != NULL && *cp != '\0')
1526 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1527
1528 cp = more ? ++cp2 : NULL;
1529 }
1530 while (cp != NULL);
1531 }
1532 }
1533
1534 if (! (bfd_elf_size_dynamic_sections
1535 (link_info.output_bfd, command_line.soname, rpath,
1536 command_line.filter_shlib, audit, depaudit,
1537 (const char * const *) command_line.auxiliary_filters,
1538 &link_info, &sinterp)))
1539 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1540
1541 ${ELF_INTERPRETER_SET_DEFAULT}
1542 /* Let the user override the dynamic linker we are using. */
1543 if (command_line.interpreter != NULL
1544 && sinterp != NULL)
1545 {
1546 sinterp->contents = (bfd_byte *) command_line.interpreter;
1547 sinterp->size = strlen (command_line.interpreter) + 1;
1548 }
1549
1550 /* Look for any sections named .gnu.warning. As a GNU extensions,
1551 we treat such sections as containing warning messages. We print
1552 out the warning message, and then zero out the section size so
1553 that it does not get copied into the output file. */
1554
1555 {
1556 LANG_FOR_EACH_INPUT_STATEMENT (is)
1557 {
1558 asection *s;
1559 bfd_size_type sz;
1560 char *msg;
1561 bfd_boolean ret;
1562
1563 if (is->just_syms_flag)
1564 continue;
1565
1566 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1567 if (s == NULL)
1568 continue;
1569
1570 sz = s->size;
1571 msg = (char *) xmalloc ((size_t) (sz + 1));
1572 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1573 (file_ptr) 0, sz))
1574 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1575 is->the_bfd);
1576 msg[sz] = '\0';
1577 ret = link_info.callbacks->warning (&link_info, msg,
1578 (const char *) NULL,
1579 is->the_bfd, (asection *) NULL,
1580 (bfd_vma) 0);
1581 ASSERT (ret);
1582 free (msg);
1583
1584 /* Clobber the section size, so that we don't waste space
1585 copying the warning into the output file. If we've already
1586 sized the output section, adjust its size. The adjustment
1587 is on rawsize because targets that size sections early will
1588 have called lang_reset_memory_regions after sizing. */
1589 if (s->output_section != NULL
1590 && s->output_section->rawsize >= s->size)
1591 s->output_section->rawsize -= s->size;
1592
1593 s->size = 0;
1594
1595 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1596 warning section don't get copied to the output. */
1597 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1598 }
1599 }
1600
1601 before_allocation_default ();
1602
1603 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1604 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1605 }
1606
1607 EOF
1608 fi
1609
1610 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1611 fragment <<EOF
1612
1613 /* Try to open a dynamic archive. This is where we know that ELF
1614 dynamic libraries have an extension of .so (or .sl on oddball systems
1615 like hpux). */
1616
1617 static bfd_boolean
1618 gld${EMULATION_NAME}_open_dynamic_archive
1619 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1620 {
1621 const char *filename;
1622 char *string;
1623
1624 if (! entry->maybe_archive)
1625 return FALSE;
1626
1627 filename = entry->filename;
1628
1629 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1630 is defined, but it does not seem worth the headache to optimize
1631 away those two bytes of space. */
1632 string = (char *) xmalloc (strlen (search->name)
1633 + strlen (filename)
1634 + strlen (arch)
1635 #ifdef EXTRA_SHLIB_EXTENSION
1636 + strlen (EXTRA_SHLIB_EXTENSION)
1637 #endif
1638 + sizeof "/lib.so");
1639
1640 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1641
1642 #ifdef EXTRA_SHLIB_EXTENSION
1643 /* Try the .so extension first. If that fails build a new filename
1644 using EXTRA_SHLIB_EXTENSION. */
1645 if (! ldfile_try_open_bfd (string, entry))
1646 {
1647 sprintf (string, "%s/lib%s%s%s", search->name,
1648 filename, arch, EXTRA_SHLIB_EXTENSION);
1649 #endif
1650
1651 if (! ldfile_try_open_bfd (string, entry))
1652 {
1653 free (string);
1654 return FALSE;
1655 }
1656 #ifdef EXTRA_SHLIB_EXTENSION
1657 }
1658 #endif
1659
1660 entry->filename = string;
1661
1662 /* We have found a dynamic object to include in the link. The ELF
1663 backend linker will create a DT_NEEDED entry in the .dynamic
1664 section naming this file. If this file includes a DT_SONAME
1665 entry, it will be used. Otherwise, the ELF linker will just use
1666 the name of the file. For an archive found by searching, like
1667 this one, the DT_NEEDED entry should consist of just the name of
1668 the file, without the path information used to find it. Note
1669 that we only need to do this if we have a dynamic object; an
1670 archive will never be referenced by a DT_NEEDED entry.
1671
1672 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1673 very pretty. I haven't been able to think of anything that is
1674 pretty, though. */
1675 if (bfd_check_format (entry->the_bfd, bfd_object)
1676 && (entry->the_bfd->flags & DYNAMIC) != 0)
1677 {
1678 ASSERT (entry->maybe_archive && entry->search_dirs_flag);
1679
1680 /* Rather than duplicating the logic above. Just use the
1681 filename we recorded earlier. */
1682
1683 filename = lbasename (entry->filename);
1684 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1685 }
1686
1687 return TRUE;
1688 }
1689
1690 EOF
1691 fi
1692
1693 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1694 fragment <<EOF
1695
1696 /* A variant of lang_output_section_find used by place_orphan. */
1697
1698 static lang_output_section_statement_type *
1699 output_rel_find (asection *sec, int isdyn)
1700 {
1701 lang_output_section_statement_type *lookup;
1702 lang_output_section_statement_type *last = NULL;
1703 lang_output_section_statement_type *last_alloc = NULL;
1704 lang_output_section_statement_type *last_ro_alloc = NULL;
1705 lang_output_section_statement_type *last_rel = NULL;
1706 lang_output_section_statement_type *last_rel_alloc = NULL;
1707 int rela = sec->name[4] == 'a';
1708
1709 for (lookup = &lang_output_section_statement.head->output_section_statement;
1710 lookup != NULL;
1711 lookup = lookup->next)
1712 {
1713 if (lookup->constraint >= 0
1714 && CONST_STRNEQ (lookup->name, ".rel"))
1715 {
1716 int lookrela = lookup->name[4] == 'a';
1717
1718 /* .rel.dyn must come before all other reloc sections, to suit
1719 GNU ld.so. */
1720 if (isdyn)
1721 break;
1722
1723 /* Don't place after .rel.plt as doing so results in wrong
1724 dynamic tags. */
1725 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1726 break;
1727
1728 if (rela == lookrela || last_rel == NULL)
1729 last_rel = lookup;
1730 if ((rela == lookrela || last_rel_alloc == NULL)
1731 && lookup->bfd_section != NULL
1732 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1733 last_rel_alloc = lookup;
1734 }
1735
1736 last = lookup;
1737 if (lookup->bfd_section != NULL
1738 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1739 {
1740 last_alloc = lookup;
1741 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1742 last_ro_alloc = lookup;
1743 }
1744 }
1745
1746 if (last_rel_alloc)
1747 return last_rel_alloc;
1748
1749 if (last_rel)
1750 return last_rel;
1751
1752 if (last_ro_alloc)
1753 return last_ro_alloc;
1754
1755 if (last_alloc)
1756 return last_alloc;
1757
1758 return last;
1759 }
1760
1761 /* Place an orphan section. We use this to put random SHF_ALLOC
1762 sections in the right segment. */
1763
1764 static lang_output_section_statement_type *
1765 gld${EMULATION_NAME}_place_orphan (asection *s,
1766 const char *secname,
1767 int constraint)
1768 {
1769 static struct orphan_save hold[] =
1770 {
1771 { ".text",
1772 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1773 0, 0, 0, 0 },
1774 { ".rodata",
1775 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1776 0, 0, 0, 0 },
1777 { ".data",
1778 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1779 0, 0, 0, 0 },
1780 { ".bss",
1781 SEC_ALLOC,
1782 0, 0, 0, 0 },
1783 { 0,
1784 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1785 0, 0, 0, 0 },
1786 { ".interp",
1787 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1788 0, 0, 0, 0 },
1789 { ".sdata",
1790 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1791 0, 0, 0, 0 },
1792 { ".comment",
1793 SEC_HAS_CONTENTS,
1794 0, 0, 0, 0 },
1795 };
1796 enum orphan_save_index
1797 {
1798 orphan_text = 0,
1799 orphan_rodata,
1800 orphan_data,
1801 orphan_bss,
1802 orphan_rel,
1803 orphan_interp,
1804 orphan_sdata,
1805 orphan_nonalloc
1806 };
1807 static int orphan_init_done = 0;
1808 struct orphan_save *place;
1809 lang_output_section_statement_type *after;
1810 lang_output_section_statement_type *os;
1811 lang_output_section_statement_type *match_by_name = NULL;
1812 int isdyn = 0;
1813 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1814 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1815
1816 if (! link_info.relocatable
1817 && link_info.combreloc
1818 && (s->flags & SEC_ALLOC))
1819 {
1820 if (iself)
1821 switch (sh_type)
1822 {
1823 case SHT_RELA:
1824 secname = ".rela.dyn";
1825 isdyn = 1;
1826 break;
1827 case SHT_REL:
1828 secname = ".rel.dyn";
1829 isdyn = 1;
1830 break;
1831 default:
1832 break;
1833 }
1834 else if (CONST_STRNEQ (secname, ".rel"))
1835 {
1836 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1837 isdyn = 1;
1838 }
1839 }
1840
1841 /* Look through the script to see where to place this section. */
1842 if (constraint == 0)
1843 for (os = lang_output_section_find (secname);
1844 os != NULL;
1845 os = next_matching_output_section_statement (os, 0))
1846 {
1847 /* If we don't match an existing output section, tell
1848 lang_insert_orphan to create a new output section. */
1849 constraint = SPECIAL;
1850
1851 if (os->bfd_section != NULL
1852 && (os->bfd_section->flags == 0
1853 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1854 os->bfd_section,
1855 s->owner, s)
1856 && ((s->flags ^ os->bfd_section->flags)
1857 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1858 {
1859 /* We already have an output section statement with this
1860 name, and its bfd section has compatible flags.
1861 If the section already exists but does not have any flags
1862 set, then it has been created by the linker, probably as a
1863 result of a --section-start command line switch. */
1864 lang_add_section (&os->children, s, os);
1865 return os;
1866 }
1867
1868 /* Save unused output sections in case we can match them
1869 against orphans later. */
1870 if (os->bfd_section == NULL)
1871 match_by_name = os;
1872 }
1873
1874 /* If we didn't match an active output section, see if we matched an
1875 unused one and use that. */
1876 if (match_by_name)
1877 {
1878 lang_add_section (&match_by_name->children, s, match_by_name);
1879 return match_by_name;
1880 }
1881
1882 if (!orphan_init_done)
1883 {
1884 struct orphan_save *ho;
1885
1886 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1887 if (ho->name != NULL)
1888 {
1889 ho->os = lang_output_section_find (ho->name);
1890 if (ho->os != NULL && ho->os->flags == 0)
1891 ho->os->flags = ho->flags;
1892 }
1893 orphan_init_done = 1;
1894 }
1895
1896 /* If this is a final link, then always put .gnu.warning.SYMBOL
1897 sections into the .text section to get them out of the way. */
1898 if (link_info.executable
1899 && ! link_info.relocatable
1900 && CONST_STRNEQ (s->name, ".gnu.warning.")
1901 && hold[orphan_text].os != NULL)
1902 {
1903 os = hold[orphan_text].os;
1904 lang_add_section (&os->children, s, os);
1905 return os;
1906 }
1907
1908 /* Decide which segment the section should go in based on the
1909 section name and section flags. We put loadable .note sections
1910 right after the .interp section, so that the PT_NOTE segment is
1911 stored right after the program headers where the OS can read it
1912 in the first page. */
1913
1914 place = NULL;
1915 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1916 place = &hold[orphan_nonalloc];
1917 else if ((s->flags & SEC_ALLOC) == 0)
1918 ;
1919 else if ((s->flags & SEC_LOAD) != 0
1920 && ((iself && sh_type == SHT_NOTE)
1921 || (!iself && CONST_STRNEQ (secname, ".note"))))
1922 place = &hold[orphan_interp];
1923 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1924 place = &hold[orphan_bss];
1925 else if ((s->flags & SEC_SMALL_DATA) != 0)
1926 place = &hold[orphan_sdata];
1927 else if ((s->flags & SEC_READONLY) == 0)
1928 place = &hold[orphan_data];
1929 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1930 || (!iself && CONST_STRNEQ (secname, ".rel")))
1931 && (s->flags & SEC_LOAD) != 0)
1932 place = &hold[orphan_rel];
1933 else if ((s->flags & SEC_CODE) == 0)
1934 place = &hold[orphan_rodata];
1935 else
1936 place = &hold[orphan_text];
1937
1938 after = NULL;
1939 if (place != NULL)
1940 {
1941 if (place->os == NULL)
1942 {
1943 if (place->name != NULL)
1944 place->os = lang_output_section_find (place->name);
1945 else
1946 place->os = output_rel_find (s, isdyn);
1947 }
1948 after = place->os;
1949 if (after == NULL)
1950 after = lang_output_section_find_by_flags
1951 (s, &place->os, _bfd_elf_match_sections_by_type);
1952 if (after == NULL)
1953 /* *ABS* is always the first output section statement. */
1954 after = &lang_output_section_statement.head->output_section_statement;
1955 }
1956
1957 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1958 }
1959 EOF
1960 fi
1961
1962 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1963 fragment <<EOF
1964
1965 static void
1966 gld${EMULATION_NAME}_after_allocation (void)
1967 {
1968 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1969 &link_info);
1970 gld${EMULATION_NAME}_map_segments (need_layout);
1971 }
1972 EOF
1973 fi
1974
1975 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1976 fragment <<EOF
1977
1978 static char *
1979 gld${EMULATION_NAME}_get_script (int *isfile)
1980 EOF
1981
1982 if test -n "$COMPILE_IN"
1983 then
1984 # Scripts compiled in.
1985
1986 # sed commands to quote an ld script as a C string.
1987 sc="-f stringify.sed"
1988
1989 fragment <<EOF
1990 {
1991 *isfile = 0;
1992
1993 if (link_info.relocatable && config.build_constructors)
1994 return
1995 EOF
1996 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1997 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1998 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1999 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2000 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2001 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2002 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2003 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2004 fi
2005 if test -n "$GENERATE_PIE_SCRIPT" ; then
2006 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2007 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2008 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2009 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2010 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2011 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2012 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2013 fi
2014 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2015 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2016 fi
2017 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2018 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2019 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2020 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2021 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2022 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2023 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2024 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2025 fi
2026 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2027 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2028 fi
2029 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2030 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2031 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2032 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2033 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2034 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2035 fi
2036 echo ' ; else return' >> e${EMULATION_NAME}.c
2037 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2038 echo '; }' >> e${EMULATION_NAME}.c
2039
2040 else
2041 # Scripts read from the filesystem.
2042
2043 fragment <<EOF
2044 {
2045 *isfile = 1;
2046
2047 if (link_info.relocatable && config.build_constructors)
2048 return "ldscripts/${EMULATION_NAME}.xu";
2049 else if (link_info.relocatable)
2050 return "ldscripts/${EMULATION_NAME}.xr";
2051 else if (!config.text_read_only)
2052 return "ldscripts/${EMULATION_NAME}.xbn";
2053 EOF
2054 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2055 else
2056 fragment <<EOF
2057 else if (!config.magic_demand_paged)
2058 return "ldscripts/${EMULATION_NAME}.xn";
2059 EOF
2060 fi
2061 if test -n "$GENERATE_PIE_SCRIPT" ; then
2062 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2063 fragment <<EOF
2064 else if (link_info.pie && link_info.combreloc
2065 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2066 return "ldscripts/${EMULATION_NAME}.xdw";
2067 else if (link_info.pie && link_info.combreloc)
2068 return "ldscripts/${EMULATION_NAME}.xdc";
2069 EOF
2070 fi
2071 fragment <<EOF
2072 else if (link_info.pie)
2073 return "ldscripts/${EMULATION_NAME}.xd";
2074 EOF
2075 fi
2076 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2077 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2078 fragment <<EOF
2079 else if (link_info.shared && link_info.combreloc
2080 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2081 return "ldscripts/${EMULATION_NAME}.xsw";
2082 else if (link_info.shared && link_info.combreloc)
2083 return "ldscripts/${EMULATION_NAME}.xsc";
2084 EOF
2085 fi
2086 fragment <<EOF
2087 else if (link_info.shared)
2088 return "ldscripts/${EMULATION_NAME}.xs";
2089 EOF
2090 fi
2091 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2092 fragment <<EOF
2093 else if (link_info.combreloc && link_info.relro
2094 && (link_info.flags & DF_BIND_NOW))
2095 return "ldscripts/${EMULATION_NAME}.xw";
2096 else if (link_info.combreloc)
2097 return "ldscripts/${EMULATION_NAME}.xc";
2098 EOF
2099 fi
2100 fragment <<EOF
2101 else
2102 return "ldscripts/${EMULATION_NAME}.x";
2103 }
2104
2105 EOF
2106 fi
2107 fi
2108
2109 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2110 fragment <<EOF
2111 $PARSE_AND_LIST_PROLOGUE
2112 EOF
2113 fi
2114
2115 fragment <<EOF
2116
2117 #define OPTION_DISABLE_NEW_DTAGS (400)
2118 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2119 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2120 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2121 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2122 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2123 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2124 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2125
2126 static void
2127 gld${EMULATION_NAME}_add_options
2128 (int ns, char **shortopts, int nl, struct option **longopts,
2129 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2130 {
2131 EOF
2132 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2133 fragment <<EOF
2134 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2135 EOF
2136 else
2137 fragment <<EOF
2138 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2139 EOF
2140 fi
2141 fragment <<EOF
2142 static const struct option xtra_long[] = {
2143 EOF
2144 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2145 fragment <<EOF
2146 {"audit", required_argument, NULL, OPTION_AUDIT},
2147 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2148 EOF
2149 fi
2150 fragment <<EOF
2151 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2152 EOF
2153 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2154 fragment <<EOF
2155 {"depaudit", required_argument, NULL, 'P'},
2156 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2157 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2158 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2159 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2160 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2161 EOF
2162 fi
2163 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2164 fragment <<EOF
2165 $PARSE_AND_LIST_LONGOPTS
2166 EOF
2167 fi
2168 fragment <<EOF
2169 {NULL, no_argument, NULL, 0}
2170 };
2171
2172 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2173 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2174 *longopts = (struct option *)
2175 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2176 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2177 }
2178
2179 #define DEFAULT_BUILD_ID_STYLE "sha1"
2180
2181 static bfd_boolean
2182 gld${EMULATION_NAME}_handle_option (int optc)
2183 {
2184 switch (optc)
2185 {
2186 default:
2187 return FALSE;
2188
2189 case OPTION_BUILD_ID:
2190 if (link_info.emit_note_gnu_build_id != NULL)
2191 {
2192 free (link_info.emit_note_gnu_build_id);
2193 link_info.emit_note_gnu_build_id = NULL;
2194 }
2195 if (optarg == NULL)
2196 optarg = DEFAULT_BUILD_ID_STYLE;
2197 if (strcmp (optarg, "none"))
2198 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2199 break;
2200
2201 EOF
2202
2203 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2204 fragment <<EOF
2205 case OPTION_AUDIT:
2206 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2207 break;
2208
2209 case 'P':
2210 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2211 break;
2212
2213 case OPTION_DISABLE_NEW_DTAGS:
2214 link_info.new_dtags = FALSE;
2215 break;
2216
2217 case OPTION_ENABLE_NEW_DTAGS:
2218 link_info.new_dtags = TRUE;
2219 break;
2220
2221 case OPTION_EH_FRAME_HDR:
2222 link_info.eh_frame_hdr = TRUE;
2223 break;
2224
2225 case OPTION_GROUP:
2226 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2227 /* Groups must be self-contained. */
2228 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2229 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2230 break;
2231
2232 case OPTION_EXCLUDE_LIBS:
2233 add_excluded_libs (optarg);
2234 break;
2235
2236 case OPTION_HASH_STYLE:
2237 link_info.emit_hash = FALSE;
2238 link_info.emit_gnu_hash = FALSE;
2239 if (strcmp (optarg, "sysv") == 0)
2240 link_info.emit_hash = TRUE;
2241 else if (strcmp (optarg, "gnu") == 0)
2242 link_info.emit_gnu_hash = TRUE;
2243 else if (strcmp (optarg, "both") == 0)
2244 {
2245 link_info.emit_hash = TRUE;
2246 link_info.emit_gnu_hash = TRUE;
2247 }
2248 else
2249 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2250 break;
2251
2252 EOF
2253 fi
2254 fragment <<EOF
2255 case 'z':
2256 if (strcmp (optarg, "defs") == 0)
2257 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2258 else if (strcmp (optarg, "muldefs") == 0)
2259 link_info.allow_multiple_definition = TRUE;
2260 else if (CONST_STRNEQ (optarg, "max-page-size="))
2261 {
2262 char *end;
2263
2264 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2265 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2266 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2267 optarg + 14);
2268 }
2269 else if (CONST_STRNEQ (optarg, "common-page-size="))
2270 {
2271 char *end;
2272 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2273 if (*end
2274 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2275 einfo (_("%P%F: invalid common page size \`%s'\n"),
2276 optarg + 17);
2277 }
2278 else if (strcmp (optarg, "execstack") == 0)
2279 {
2280 link_info.execstack = TRUE;
2281 link_info.noexecstack = FALSE;
2282 }
2283 else if (strcmp (optarg, "noexecstack") == 0)
2284 {
2285 link_info.noexecstack = TRUE;
2286 link_info.execstack = FALSE;
2287 }
2288 EOF
2289 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2290 fragment <<EOF
2291 else if (strcmp (optarg, "initfirst") == 0)
2292 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2293 else if (strcmp (optarg, "interpose") == 0)
2294 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2295 else if (strcmp (optarg, "loadfltr") == 0)
2296 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2297 else if (strcmp (optarg, "nodefaultlib") == 0)
2298 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2299 else if (strcmp (optarg, "nodelete") == 0)
2300 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2301 else if (strcmp (optarg, "nodlopen") == 0)
2302 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2303 else if (strcmp (optarg, "nodump") == 0)
2304 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2305 else if (strcmp (optarg, "now") == 0)
2306 {
2307 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2308 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2309 }
2310 else if (strcmp (optarg, "lazy") == 0)
2311 {
2312 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2313 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2314 }
2315 else if (strcmp (optarg, "origin") == 0)
2316 {
2317 link_info.flags |= (bfd_vma) DF_ORIGIN;
2318 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2319 }
2320 else if (strcmp (optarg, "combreloc") == 0)
2321 link_info.combreloc = TRUE;
2322 else if (strcmp (optarg, "nocombreloc") == 0)
2323 link_info.combreloc = FALSE;
2324 else if (strcmp (optarg, "nocopyreloc") == 0)
2325 link_info.nocopyreloc = TRUE;
2326 else if (strcmp (optarg, "relro") == 0)
2327 link_info.relro = TRUE;
2328 else if (strcmp (optarg, "norelro") == 0)
2329 link_info.relro = FALSE;
2330 EOF
2331 fi
2332
2333 fragment <<EOF
2334 else
2335 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2336 break;
2337 EOF
2338
2339 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2340 fragment <<EOF
2341 $PARSE_AND_LIST_ARGS_CASES
2342 EOF
2343 fi
2344
2345 fragment <<EOF
2346 }
2347
2348 return TRUE;
2349 }
2350
2351 EOF
2352
2353 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2354 fragment <<EOF
2355
2356 static void
2357 gld${EMULATION_NAME}_list_options (FILE * file)
2358 {
2359 EOF
2360 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2361 fragment <<EOF
2362 fprintf (file, _("\
2363 --audit=AUDITLIB Specify a library to use for auditing\n"));
2364 fprintf (file, _("\
2365 -Bgroup Selects group name lookup rules for DSO\n"));
2366 EOF
2367 fi
2368 fragment <<EOF
2369 fprintf (file, _("\
2370 --build-id[=STYLE] Generate build ID note\n"));
2371 EOF
2372 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2373 fragment <<EOF
2374 fprintf (file, _("\
2375 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2376 Specify a library to use for auditing dependencies\n"));
2377 fprintf (file, _("\
2378 --disable-new-dtags Disable new dynamic tags\n"));
2379 fprintf (file, _("\
2380 --enable-new-dtags Enable new dynamic tags\n"));
2381 fprintf (file, _("\
2382 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2383 fprintf (file, _("\
2384 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2385 fprintf (file, _("\
2386 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2387 fprintf (file, _("\
2388 -z combreloc Merge dynamic relocs into one section and sort\n"));
2389 EOF
2390 fi
2391
2392 fragment <<EOF
2393 fprintf (file, _("\
2394 -z common-page-size=SIZE Set common page size to SIZE\n"));
2395 fprintf (file, _("\
2396 -z defs Report unresolved symbols in object files.\n"));
2397 fprintf (file, _("\
2398 -z execstack Mark executable as requiring executable stack\n"));
2399 EOF
2400
2401 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2402 fragment <<EOF
2403 fprintf (file, _("\
2404 -z initfirst Mark DSO to be initialized first at runtime\n"));
2405 fprintf (file, _("\
2406 -z interpose Mark object to interpose all DSOs but executable\n"));
2407 fprintf (file, _("\
2408 -z lazy Mark object lazy runtime binding (default)\n"));
2409 fprintf (file, _("\
2410 -z loadfltr Mark object requiring immediate process\n"));
2411 EOF
2412 fi
2413
2414 fragment <<EOF
2415 fprintf (file, _("\
2416 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2417 fprintf (file, _("\
2418 -z muldefs Allow multiple definitions\n"));
2419 EOF
2420
2421 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2422 fragment <<EOF
2423 fprintf (file, _("\
2424 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2425 fprintf (file, _("\
2426 -z nocopyreloc Don't create copy relocs\n"));
2427 fprintf (file, _("\
2428 -z nodefaultlib Mark object not to use default search paths\n"));
2429 fprintf (file, _("\
2430 -z nodelete Mark DSO non-deletable at runtime\n"));
2431 fprintf (file, _("\
2432 -z nodlopen Mark DSO not available to dlopen\n"));
2433 fprintf (file, _("\
2434 -z nodump Mark DSO not available to dldump\n"));
2435 EOF
2436 fi
2437 fragment <<EOF
2438 fprintf (file, _("\
2439 -z noexecstack Mark executable as not requiring executable stack\n"));
2440 EOF
2441 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2442 fragment <<EOF
2443 fprintf (file, _("\
2444 -z norelro Don't create RELRO program header\n"));
2445 fprintf (file, _("\
2446 -z now Mark object non-lazy runtime binding\n"));
2447 fprintf (file, _("\
2448 -z origin Mark object requiring immediate \$ORIGIN\n\
2449 processing at runtime\n"));
2450 fprintf (file, _("\
2451 -z relro Create RELRO program header\n"));
2452 EOF
2453 fi
2454
2455 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2456 fragment <<EOF
2457 $PARSE_AND_LIST_OPTIONS
2458 EOF
2459 fi
2460
2461 fragment <<EOF
2462 }
2463 EOF
2464
2465 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2466 fragment <<EOF
2467 $PARSE_AND_LIST_EPILOGUE
2468 EOF
2469 fi
2470 fi
2471
2472 fragment <<EOF
2473
2474 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2475 {
2476 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2477 ${LDEMUL_SYSLIB-syslib_default},
2478 ${LDEMUL_HLL-hll_default},
2479 ${LDEMUL_AFTER_PARSE-after_parse_default},
2480 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2481 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2482 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2483 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2484 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2485 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2486 "${EMULATION_NAME}",
2487 "${OUTPUT_FORMAT}",
2488 ${LDEMUL_FINISH-finish_default},
2489 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2490 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2491 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2492 ${LDEMUL_SET_SYMBOLS-NULL},
2493 ${LDEMUL_PARSE_ARGS-NULL},
2494 gld${EMULATION_NAME}_add_options,
2495 gld${EMULATION_NAME}_handle_option,
2496 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2497 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2498 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2499 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2500 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2501 };
2502 EOF