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