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 ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
17 Free Software Foundation, Inc.
18 Written by Steve Chamberlain <sac@cygnus.com>
19 ELF support by Ian Lance Taylor <ian@cygnus.com>
20
21 This file is part of the GNU Binutils.
22
23 This program is free software; you can redistribute it and/or modify
24 it under the terms of the GNU General Public License as published by
25 the Free Software Foundation; either version 3 of the License, or
26 (at your option) any later version.
27
28 This program is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
32
33 You should have received a copy of the GNU General Public License
34 along with this program; if not, write to the Free Software
35 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
36 MA 02110-1301, USA. */
37
38 #define TARGET_IS_${EMULATION_NAME}
39
40 #include "sysdep.h"
41 #include "bfd.h"
42 #include "libiberty.h"
43 #include "filenames.h"
44 #include "safe-ctype.h"
45 #include "getopt.h"
46 #include "md5.h"
47 #include "sha1.h"
48 #include <fcntl.h>
49
50 #include "bfdlink.h"
51
52 #include "ld.h"
53 #include "ldmain.h"
54 #include "ldmisc.h"
55 #include "ldexp.h"
56 #include "ldlang.h"
57 #include "ldfile.h"
58 #include "ldemul.h"
59 #include <ldgram.h>
60 #include "elf/common.h"
61 #include "elf-bfd.h"
62 #include "filenames.h"
63
64 /* Declare functions used by various EXTRA_EM_FILEs. */
65 static void gld${EMULATION_NAME}_before_parse (void);
66 static void gld${EMULATION_NAME}_after_open (void);
67 static void gld${EMULATION_NAME}_before_allocation (void);
68 static void gld${EMULATION_NAME}_after_allocation (void);
69 static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan
70 (asection *, const char *, int);
71 EOF
72
73 if [ "x${USE_LIBPATH}" = xyes ] ; then
74 case ${target} in
75 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
76 fragment <<EOF
77 #ifdef HAVE_GLOB
78 #include <glob.h>
79 #endif
80 EOF
81 ;;
82 esac
83 fi
84
85 # Import any needed special functions and/or overrides.
86 #
87 source_em ${srcdir}/emultempl/elf-generic.em
88 if test -n "$EXTRA_EM_FILE" ; then
89 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
90 fi
91
92 # Functions in this file can be overridden by setting the LDEMUL_* shell
93 # variables. If the name of the overriding function is the same as is
94 # defined in this file, then don't output this file's version.
95 # If a different overriding name is given then output the standard function
96 # as presumably it is called from the overriding function.
97 #
98 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
99 fragment <<EOF
100
101 static void
102 gld${EMULATION_NAME}_before_parse (void)
103 {
104 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
105 input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
106 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
107 config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
108 }
109
110 EOF
111 fi
112
113 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
114 fragment <<EOF
115 /* Handle the generation of DT_NEEDED tags. */
116
117 static bfd_boolean
118 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
119 {
120 int link_class = 0;
121
122 /* Tell the ELF linker that we don't want the output file to have a
123 DT_NEEDED entry for this file, unless it is used to resolve
124 references in a regular object. */
125 if (entry->flags.add_DT_NEEDED_for_regular)
126 link_class = DYN_AS_NEEDED;
127
128 /* Tell the ELF linker that we don't want the output file to have a
129 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
130 this file at all. */
131 if (!entry->flags.add_DT_NEEDED_for_dynamic)
132 link_class |= DYN_NO_ADD_NEEDED;
133
134 if (entry->flags.just_syms
135 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
136 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
137 entry->the_bfd);
138
139 if (link_class == 0
140 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
141 return FALSE;
142
143 bfd_elf_set_dyn_lib_class (entry->the_bfd,
144 (enum dynamic_lib_link_class) link_class);
145
146 /* Continue on with normal load_symbols processing. */
147 return FALSE;
148 }
149 EOF
150 fi
151
152 fragment <<EOF
153
154 /* These variables are required to pass information back and forth
155 between after_open and check_needed and stat_needed and vercheck. */
156
157 static struct bfd_link_needed_list *global_needed;
158 static struct stat global_stat;
159 static lang_input_statement_type *global_found;
160 static struct bfd_link_needed_list *global_vercheck_needed;
161 static bfd_boolean global_vercheck_failed;
162
163 /* These variables are used to implement target options */
164
165 static char *audit; /* colon (typically) separated list of libs */
166 static char *depaudit; /* colon (typically) separated list of libs */
167
168 /* On Linux, it's possible to have different versions of the same
169 shared library linked against different versions of libc. The
170 dynamic linker somehow tags which libc version to use in
171 /etc/ld.so.cache, and, based on the libc that it sees in the
172 executable, chooses which version of the shared library to use.
173
174 We try to do a similar check here by checking whether this shared
175 library needs any other shared libraries which may conflict with
176 libraries we have already included in the link. If it does, we
177 skip it, and try to find another shared library farther on down the
178 link path.
179
180 This is called via lang_for_each_input_file.
181 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
182 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
183 a conflicting version. */
184
185 static void
186 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
187 {
188 const char *soname;
189 struct bfd_link_needed_list *l;
190
191 if (global_vercheck_failed)
192 return;
193 if (s->the_bfd == NULL
194 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
195 return;
196
197 soname = bfd_elf_get_dt_soname (s->the_bfd);
198 if (soname == NULL)
199 soname = lbasename (bfd_get_filename (s->the_bfd));
200
201 for (l = global_vercheck_needed; l != NULL; l = l->next)
202 {
203 const char *suffix;
204
205 if (filename_cmp (soname, l->name) == 0)
206 {
207 /* Probably can't happen, but it's an easy check. */
208 continue;
209 }
210
211 if (strchr (l->name, '/') != NULL)
212 continue;
213
214 suffix = strstr (l->name, ".so.");
215 if (suffix == NULL)
216 continue;
217
218 suffix += sizeof ".so." - 1;
219
220 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
221 {
222 /* Here we know that S is a dynamic object FOO.SO.VER1, and
223 the object we are considering needs a dynamic object
224 FOO.SO.VER2, and VER1 and VER2 are different. This
225 appears to be a version mismatch, so we tell the caller
226 to try a different version of this library. */
227 global_vercheck_failed = TRUE;
228 return;
229 }
230 }
231 }
232
233
234 /* See if an input file matches a DT_NEEDED entry by running stat on
235 the file. */
236
237 static void
238 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
239 {
240 struct stat st;
241 const char *suffix;
242 const char *soname;
243
244 if (global_found != NULL)
245 return;
246 if (s->the_bfd == NULL)
247 return;
248
249 /* If this input file was an as-needed entry, and wasn't found to be
250 needed at the stage it was linked, then don't say we have loaded it. */
251 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
252 return;
253
254 if (bfd_stat (s->the_bfd, &st) != 0)
255 {
256 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
257 return;
258 }
259
260 /* Some operating systems, e.g. Windows, do not provide a meaningful
261 st_ino; they always set it to zero. (Windows does provide a
262 meaningful st_dev.) Do not indicate a duplicate library in that
263 case. While there is no guarantee that a system that provides
264 meaningful inode numbers will never set st_ino to zero, this is
265 merely an optimization, so we do not need to worry about false
266 negatives. */
267 if (st.st_dev == global_stat.st_dev
268 && st.st_ino == global_stat.st_ino
269 && st.st_ino != 0)
270 {
271 global_found = s;
272 return;
273 }
274
275 /* We issue a warning if it looks like we are including two
276 different versions of the same shared library. For example,
277 there may be a problem if -lc picks up libc.so.6 but some other
278 shared library has a DT_NEEDED entry of libc.so.5. This is a
279 heuristic test, and it will only work if the name looks like
280 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
281 If we really want to issue warnings about mixing version numbers
282 of shared libraries, we need to find a better way. */
283
284 if (strchr (global_needed->name, '/') != NULL)
285 return;
286 suffix = strstr (global_needed->name, ".so.");
287 if (suffix == NULL)
288 return;
289 suffix += sizeof ".so." - 1;
290
291 soname = bfd_elf_get_dt_soname (s->the_bfd);
292 if (soname == NULL)
293 soname = lbasename (s->filename);
294
295 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
296 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
297 global_needed->name, global_needed->by, soname);
298 }
299
300 struct dt_needed
301 {
302 bfd *by;
303 const char *name;
304 };
305
306 /* This function is called for each possible name for a dynamic object
307 named by a DT_NEEDED entry. The FORCE parameter indicates whether
308 to skip the check for a conflicting version. */
309
310 static bfd_boolean
311 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
312 int force)
313 {
314 bfd *abfd;
315 const char *name = needed->name;
316 const char *soname;
317 int link_class;
318
319 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
320 if (abfd == NULL)
321 return FALSE;
322
323 /* Linker needs to decompress sections. */
324 abfd->flags |= BFD_DECOMPRESS;
325
326 if (! bfd_check_format (abfd, bfd_object))
327 {
328 bfd_close (abfd);
329 return FALSE;
330 }
331 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
332 {
333 bfd_close (abfd);
334 return FALSE;
335 }
336
337 /* For DT_NEEDED, they have to match. */
338 if (abfd->xvec != link_info.output_bfd->xvec)
339 {
340 bfd_close (abfd);
341 return FALSE;
342 }
343
344 /* Check whether this object would include any conflicting library
345 versions. If FORCE is set, then we skip this check; we use this
346 the second time around, if we couldn't find any compatible
347 instance of the shared library. */
348
349 if (! force)
350 {
351 struct bfd_link_needed_list *needs;
352
353 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
354 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
355
356 if (needs != NULL)
357 {
358 global_vercheck_needed = needs;
359 global_vercheck_failed = FALSE;
360 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
361 if (global_vercheck_failed)
362 {
363 bfd_close (abfd);
364 /* Return FALSE to force the caller to move on to try
365 another file on the search path. */
366 return FALSE;
367 }
368
369 /* But wait! It gets much worse. On Linux, if a shared
370 library does not use libc at all, we are supposed to skip
371 it the first time around in case we encounter a shared
372 library later on with the same name which does use the
373 version of libc that we want. This is much too horrible
374 to use on any system other than Linux. */
375
376 EOF
377 case ${target} in
378 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
379 fragment <<EOF
380 {
381 struct bfd_link_needed_list *l;
382
383 for (l = needs; l != NULL; l = l->next)
384 if (CONST_STRNEQ (l->name, "libc.so"))
385 break;
386 if (l == NULL)
387 {
388 bfd_close (abfd);
389 return FALSE;
390 }
391 }
392
393 EOF
394 ;;
395 esac
396 fragment <<EOF
397 }
398 }
399
400 /* We've found a dynamic object matching the DT_NEEDED entry. */
401
402 /* We have already checked that there is no other input file of the
403 same name. We must now check again that we are not including the
404 same file twice. We need to do this because on many systems
405 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
406 reference libc.so.1. If we have already included libc.so, we
407 don't want to include libc.so.1 if they are the same file, and we
408 can only check that using stat. */
409
410 if (bfd_stat (abfd, &global_stat) != 0)
411 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
412
413 /* First strip off everything before the last '/'. */
414 soname = lbasename (abfd->filename);
415
416 if (verbose)
417 info_msg (_("found %s at %s\n"), soname, name);
418
419 global_found = NULL;
420 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
421 if (global_found != NULL)
422 {
423 /* Return TRUE to indicate that we found the file, even though
424 we aren't going to do anything with it. */
425 return TRUE;
426 }
427
428 /* Specify the soname to use. */
429 bfd_elf_set_dt_needed_name (abfd, soname);
430
431 /* Tell the ELF linker that we don't want the output file to have a
432 DT_NEEDED entry for this file, unless it is used to resolve
433 references in a regular object. */
434 link_class = DYN_DT_NEEDED;
435
436 /* Tell the ELF linker that we don't want the output file to have a
437 DT_NEEDED entry for this file at all if the entry is from a file
438 with DYN_NO_ADD_NEEDED. */
439 if (needed->by != NULL
440 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
441 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
442
443 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
444
445 /* Add this file into the symbol table. */
446 if (! bfd_link_add_symbols (abfd, &link_info))
447 einfo ("%F%B: could not read symbols: %E\n", abfd);
448
449 return TRUE;
450 }
451
452
453 /* Search for a needed file in a path. */
454
455 static bfd_boolean
456 gld${EMULATION_NAME}_search_needed (const char *path,
457 struct dt_needed *n, int force)
458 {
459 const char *s;
460 const char *name = n->name;
461 size_t len;
462 struct dt_needed needed;
463
464 if (name[0] == '/')
465 return gld${EMULATION_NAME}_try_needed (n, force);
466
467 if (path == NULL || *path == '\0')
468 return FALSE;
469
470 needed.by = n->by;
471 needed.name = n->name;
472
473 len = strlen (name);
474 while (1)
475 {
476 char *filename, *sset;
477
478 s = strchr (path, config.rpath_separator);
479 if (s == NULL)
480 s = path + strlen (path);
481
482 #if HAVE_DOS_BASED_FILE_SYSTEM
483 /* Assume a match on the second char is part of drive specifier. */
484 else if (config.rpath_separator == ':'
485 && s == path + 1
486 && ISALPHA (*path))
487 {
488 s = strchr (s + 1, config.rpath_separator);
489 if (s == NULL)
490 s = path + strlen (path);
491 }
492 #endif
493 filename = (char *) xmalloc (s - path + len + 2);
494 if (s == path)
495 sset = filename;
496 else
497 {
498 memcpy (filename, path, s - path);
499 filename[s - path] = '/';
500 sset = filename + (s - path) + 1;
501 }
502 strcpy (sset, name);
503
504 needed.name = filename;
505 if (gld${EMULATION_NAME}_try_needed (&needed, force))
506 return TRUE;
507
508 free (filename);
509
510 if (*s == '\0')
511 break;
512 path = s + 1;
513 }
514
515 return FALSE;
516 }
517
518 EOF
519 if [ "x${USE_LIBPATH}" = xyes ] ; then
520 fragment <<EOF
521
522 /* Add the sysroot to every entry in a path separated by
523 config.rpath_separator. */
524
525 static char *
526 gld${EMULATION_NAME}_add_sysroot (const char *path)
527 {
528 int len, colons, i;
529 char *ret, *p;
530
531 len = strlen (path);
532 colons = 0;
533 i = 0;
534 while (path[i])
535 if (path[i++] == config.rpath_separator)
536 colons++;
537
538 if (path[i])
539 colons++;
540
541 len = len + (colons + 1) * strlen (ld_sysroot);
542 ret = xmalloc (len + 1);
543 strcpy (ret, ld_sysroot);
544 p = ret + strlen (ret);
545 i = 0;
546 while (path[i])
547 if (path[i] == config.rpath_separator)
548 {
549 *p++ = path[i++];
550 strcpy (p, ld_sysroot);
551 p = p + strlen (p);
552 }
553 else
554 *p++ = path[i++];
555
556 *p = 0;
557 return ret;
558 }
559
560 EOF
561 case ${target} in
562 *-*-freebsd* | *-*-dragonfly*)
563 fragment <<EOF
564 /* Read the system search path the FreeBSD way rather than the Linux way. */
565 #ifdef HAVE_ELF_HINTS_H
566 #include <elf-hints.h>
567 #else
568 #include "elf-hints-local.h"
569 #endif
570
571 static bfd_boolean
572 gld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force)
573 {
574 static bfd_boolean initialized;
575 static char *ld_elf_hints;
576 struct dt_needed needed;
577
578 if (!initialized)
579 {
580 FILE *f;
581 char *tmppath;
582
583 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
584 f = fopen (tmppath, FOPEN_RB);
585 free (tmppath);
586 if (f != NULL)
587 {
588 struct elfhints_hdr hdr;
589
590 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
591 && hdr.magic == ELFHINTS_MAGIC
592 && hdr.version == 1)
593 {
594 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
595 {
596 char *b;
597
598 b = xmalloc (hdr.dirlistlen + 1);
599 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
600 hdr.dirlistlen + 1)
601 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
602
603 free (b);
604 }
605 }
606 fclose (f);
607 }
608
609 initialized = TRUE;
610 }
611
612 if (ld_elf_hints == NULL)
613 return FALSE;
614
615 needed.by = NULL;
616 needed.name = name;
617 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,
618 force);
619 }
620 EOF
621 # FreeBSD
622 ;;
623
624 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
625 fragment <<EOF
626 /* For a native linker, check the file /etc/ld.so.conf for directories
627 in which we may find shared libraries. /etc/ld.so.conf is really
628 only meaningful on Linux. */
629
630 struct gld${EMULATION_NAME}_ld_so_conf
631 {
632 char *path;
633 size_t len, alloc;
634 };
635
636 static bfd_boolean
637 gld${EMULATION_NAME}_parse_ld_so_conf
638 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
639
640 static void
641 gld${EMULATION_NAME}_parse_ld_so_conf_include
642 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
643 const char *pattern)
644 {
645 char *newp = NULL;
646 #ifdef HAVE_GLOB
647 glob_t gl;
648 #endif
649
650 if (pattern[0] != '/')
651 {
652 char *p = strrchr (filename, '/');
653 size_t patlen = strlen (pattern) + 1;
654
655 newp = xmalloc (p - filename + 1 + patlen);
656 memcpy (newp, filename, p - filename + 1);
657 memcpy (newp + (p - filename + 1), pattern, patlen);
658 pattern = newp;
659 }
660
661 #ifdef HAVE_GLOB
662 if (glob (pattern, 0, NULL, &gl) == 0)
663 {
664 size_t i;
665
666 for (i = 0; i < gl.gl_pathc; ++i)
667 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
668 globfree (&gl);
669 }
670 #else
671 /* If we do not have glob, treat the pattern as a literal filename. */
672 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
673 #endif
674
675 if (newp)
676 free (newp);
677 }
678
679 static bfd_boolean
680 gld${EMULATION_NAME}_parse_ld_so_conf
681 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
682 {
683 FILE *f = fopen (filename, FOPEN_RT);
684 char *line;
685 size_t linelen;
686
687 if (f == NULL)
688 return FALSE;
689
690 linelen = 256;
691 line = xmalloc (linelen);
692 do
693 {
694 char *p = line, *q;
695
696 /* Normally this would use getline(3), but we need to be portable. */
697 while ((q = fgets (p, linelen - (p - line), f)) != NULL
698 && strlen (q) == linelen - (p - line) - 1
699 && line[linelen - 2] != '\n')
700 {
701 line = xrealloc (line, 2 * linelen);
702 p = line + linelen - 1;
703 linelen += linelen;
704 }
705
706 if (q == NULL && p == line)
707 break;
708
709 p = strchr (line, '\n');
710 if (p)
711 *p = '\0';
712
713 /* Because the file format does not know any form of quoting we
714 can search forward for the next '#' character and if found
715 make it terminating the line. */
716 p = strchr (line, '#');
717 if (p)
718 *p = '\0';
719
720 /* Remove leading whitespace. NUL is no whitespace character. */
721 p = line;
722 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
723 ++p;
724
725 /* If the line is blank it is ignored. */
726 if (p[0] == '\0')
727 continue;
728
729 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
730 {
731 char *dir, c;
732 p += 8;
733 do
734 {
735 while (*p == ' ' || *p == '\t')
736 ++p;
737
738 if (*p == '\0')
739 break;
740
741 dir = p;
742
743 while (*p != ' ' && *p != '\t' && *p)
744 ++p;
745
746 c = *p;
747 *p++ = '\0';
748 if (dir[0] != '\0')
749 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
750 dir);
751 }
752 while (c != '\0');
753 }
754 else
755 {
756 char *dir = p;
757 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
758 && *p != '\r' && *p != '\v')
759 ++p;
760
761 while (p != dir && p[-1] == '/')
762 --p;
763 if (info->path == NULL)
764 {
765 info->alloc = p - dir + 1 + 256;
766 info->path = xmalloc (info->alloc);
767 info->len = 0;
768 }
769 else
770 {
771 if (info->len + 1 + (p - dir) >= info->alloc)
772 {
773 info->alloc += p - dir + 256;
774 info->path = xrealloc (info->path, info->alloc);
775 }
776 info->path[info->len++] = config.rpath_separator;
777 }
778 memcpy (info->path + info->len, dir, p - dir);
779 info->len += p - dir;
780 info->path[info->len] = '\0';
781 }
782 }
783 while (! feof (f));
784 free (line);
785 fclose (f);
786 return TRUE;
787 }
788
789 static bfd_boolean
790 gld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force)
791 {
792 static bfd_boolean initialized;
793 static char *ld_so_conf;
794 struct dt_needed needed;
795
796 if (! initialized)
797 {
798 char *tmppath;
799 struct gld${EMULATION_NAME}_ld_so_conf info;
800
801 info.path = NULL;
802 info.len = info.alloc = 0;
803 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
804 (const char *) NULL);
805 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
806 {
807 free (tmppath);
808 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
809 (const char *) NULL);
810 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
811 }
812 free (tmppath);
813
814 if (info.path)
815 {
816 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
817 free (info.path);
818 ld_so_conf = d;
819 }
820 initialized = TRUE;
821 }
822
823 if (ld_so_conf == NULL)
824 return FALSE;
825
826
827 needed.by = NULL;
828 needed.name = name;
829 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
830 }
831
832 EOF
833 # Linux
834 ;;
835 esac
836 fi
837 fragment <<EOF
838
839 /* See if an input file matches a DT_NEEDED entry by name. */
840
841 static void
842 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
843 {
844 const char *soname;
845
846 /* Stop looking if we've found a loaded lib. */
847 if (global_found != NULL
848 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
849 & DYN_AS_NEEDED) == 0)
850 return;
851
852 if (s->filename == NULL || s->the_bfd == NULL)
853 return;
854
855 /* Don't look for a second non-loaded as-needed lib. */
856 if (global_found != NULL
857 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
858 return;
859
860 if (filename_cmp (s->filename, global_needed->name) == 0)
861 {
862 global_found = s;
863 return;
864 }
865
866 if (s->flags.search_dirs)
867 {
868 const char *f = strrchr (s->filename, '/');
869 if (f != NULL
870 && filename_cmp (f + 1, global_needed->name) == 0)
871 {
872 global_found = s;
873 return;
874 }
875 }
876
877 soname = bfd_elf_get_dt_soname (s->the_bfd);
878 if (soname != NULL
879 && filename_cmp (soname, global_needed->name) == 0)
880 {
881 global_found = s;
882 return;
883 }
884 }
885
886 EOF
887
888 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
889 fragment <<EOF
890
891 static bfd_size_type
892 gld${EMULATION_NAME}_id_note_section_size (bfd *abfd,
893 struct bfd_link_info *linfo)
894 {
895 const char *style = linfo->emit_note_gnu_build_id;
896 bfd_size_type size;
897
898 abfd = abfd;
899
900 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
901 size = (size + 3) & -(bfd_size_type) 4;
902
903 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
904 size += 128 / 8;
905 else if (!strcmp (style, "sha1"))
906 size += 160 / 8;
907 else if (!strncmp (style, "0x", 2))
908 {
909 /* ID is in string form (hex). Convert to bits. */
910 const char *id = style + 2;
911 do
912 {
913 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
914 {
915 ++size;
916 id += 2;
917 }
918 else if (*id == '-' || *id == ':')
919 ++id;
920 else
921 {
922 size = 0;
923 break;
924 }
925 } while (*id != '\0');
926 }
927 else
928 size = 0;
929
930 return size;
931 }
932
933 static unsigned char
934 read_hex (const char xdigit)
935 {
936 if (ISDIGIT (xdigit))
937 return xdigit - '0';
938 if (ISUPPER (xdigit))
939 return xdigit - 'A' + 0xa;
940 if (ISLOWER (xdigit))
941 return xdigit - 'a' + 0xa;
942 abort ();
943 return 0;
944 }
945
946 struct build_id_info
947 {
948 const char *style;
949 asection *sec;
950 };
951
952 static bfd_boolean
953 gld${EMULATION_NAME}_write_build_id_section (bfd *abfd)
954 {
955 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
956 struct build_id_info *info = (struct build_id_info *)
957 elf_tdata (abfd)->after_write_object_contents_info;
958 asection *asec;
959 Elf_Internal_Shdr *i_shdr;
960 unsigned char *contents, *id_bits;
961 bfd_size_type size;
962 Elf_External_Note *e_note;
963
964 asec = info->sec;
965 if (bfd_is_abs_section (asec->output_section))
966 {
967 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
968 " --build-id ignored.\n"));
969 return TRUE;
970 }
971 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
972
973 if (i_shdr->contents == NULL)
974 {
975 if (asec->contents == NULL)
976 asec->contents = (unsigned char *) xmalloc (asec->size);
977 contents = asec->contents;
978 }
979 else
980 contents = i_shdr->contents + asec->output_offset;
981
982 e_note = (Elf_External_Note *) contents;
983 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
984 size = (size + 3) & -(bfd_size_type) 4;
985 id_bits = contents + size;
986 size = asec->size - size;
987
988 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
989 bfd_h_put_32 (abfd, size, &e_note->descsz);
990 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
991 memcpy (e_note->name, "GNU", sizeof "GNU");
992
993 if (!strcmp (info->style, "md5"))
994 {
995 struct md5_ctx ctx;
996 md5_init_ctx (&ctx);
997 if (bed->s->checksum_contents (abfd,
998 (void (*) (const void *, size_t, void *))
999 &md5_process_bytes,
1000 &ctx))
1001 md5_finish_ctx (&ctx, id_bits);
1002 else
1003 return FALSE;
1004 }
1005 else if (!strcmp (info->style, "sha1"))
1006 {
1007 struct sha1_ctx ctx;
1008 sha1_init_ctx (&ctx);
1009 if (bed->s->checksum_contents (abfd,
1010 (void (*) (const void *, size_t, void *))
1011 &sha1_process_bytes,
1012 &ctx))
1013 sha1_finish_ctx (&ctx, id_bits);
1014 else
1015 return FALSE;
1016 }
1017 else if (!strcmp (info->style, "uuid"))
1018 {
1019 int n;
1020 int fd = open ("/dev/urandom", O_RDONLY);
1021 if (fd < 0)
1022 return FALSE;
1023 n = read (fd, id_bits, size);
1024 close (fd);
1025 if (n < (int) size)
1026 return FALSE;
1027 }
1028 else if (!strncmp (info->style, "0x", 2))
1029 {
1030 /* ID is in string form (hex). Convert to bits. */
1031 const char *id = info->style + 2;
1032 size_t n = 0;
1033 do
1034 {
1035 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1036 {
1037 id_bits[n] = read_hex (*id++) << 4;
1038 id_bits[n++] |= read_hex (*id++);
1039 }
1040 else if (*id == '-' || *id == ':')
1041 ++id;
1042 else
1043 abort (); /* Should have been validated earlier. */
1044 } while (*id != '\0');
1045 }
1046 else
1047 abort (); /* Should have been validated earlier. */
1048
1049 size = asec->size;
1050 return (bfd_seek (abfd,
1051 i_shdr->sh_offset + asec->output_offset, SEEK_SET) == 0
1052 && bfd_bwrite (contents, size, abfd) == size);
1053 }
1054
1055
1056 /* This is called after all the input files have been opened. */
1057
1058 static void
1059 gld${EMULATION_NAME}_after_open (void)
1060 {
1061 struct bfd_link_needed_list *needed, *l;
1062 struct elf_link_hash_table *htab;
1063
1064 after_open_default ();
1065
1066 htab = elf_hash_table (&link_info);
1067 if (!is_elf_hash_table (htab))
1068 return;
1069
1070 if (link_info.emit_note_gnu_build_id)
1071 {
1072 bfd *abfd;
1073 asection *s;
1074 bfd_size_type size;
1075
1076 /* Find an ELF input. */
1077 for (abfd = link_info.input_bfds;
1078 abfd != (bfd *) NULL; abfd = abfd->link_next)
1079 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1080 break;
1081
1082 if (abfd == NULL)
1083 {
1084 /* PR 10555: If there are no input files do not
1085 try to create a .note.gnu-build-id section. */
1086 free (link_info.emit_note_gnu_build_id);
1087 link_info.emit_note_gnu_build_id = NULL;
1088 }
1089 else
1090 {
1091 size = gld${EMULATION_NAME}_id_note_section_size (abfd, &link_info);
1092 if (size == 0)
1093 {
1094 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1095 free (link_info.emit_note_gnu_build_id);
1096 link_info.emit_note_gnu_build_id = NULL;
1097 }
1098 else
1099 {
1100 s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id",
1101 SEC_ALLOC | SEC_LOAD
1102 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1103 | SEC_READONLY | SEC_DATA);
1104 if (s != NULL && bfd_set_section_alignment (abfd, s, 2))
1105 {
1106 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1107 struct build_id_info *b =
1108 (struct build_id_info *) xmalloc (sizeof *b);
1109
1110 b->style = link_info.emit_note_gnu_build_id;
1111 b->sec = s;
1112 elf_section_type (s) = SHT_NOTE;
1113 s->size = size;
1114 t->after_write_object_contents
1115 = &gld${EMULATION_NAME}_write_build_id_section;
1116 t->after_write_object_contents_info = b;
1117 }
1118 else
1119 {
1120 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1121 " --build-id ignored.\n");
1122 free (link_info.emit_note_gnu_build_id);
1123 link_info.emit_note_gnu_build_id = NULL;
1124 }
1125 }
1126 }
1127 }
1128
1129 if (link_info.relocatable)
1130 return;
1131
1132 if (link_info.eh_frame_hdr
1133 && !link_info.traditional_format)
1134 {
1135 bfd *abfd, *elfbfd = NULL;
1136 bfd_boolean warn_eh_frame = FALSE;
1137 asection *s;
1138
1139 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1140 {
1141 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1142 elfbfd = abfd;
1143 if (!warn_eh_frame)
1144 {
1145 s = bfd_get_section_by_name (abfd, ".eh_frame");
1146 while (s != NULL
1147 && (s->size <= 8
1148 || bfd_is_abs_section (s->output_section)))
1149 s = bfd_get_next_section_by_name (s);
1150 warn_eh_frame = s != NULL;
1151 }
1152 if (elfbfd && warn_eh_frame)
1153 break;
1154 }
1155 if (elfbfd)
1156 {
1157 const struct elf_backend_data *bed;
1158
1159 bed = get_elf_backend_data (elfbfd);
1160 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1161 bed->dynamic_sec_flags
1162 | SEC_READONLY);
1163 if (s != NULL
1164 && bfd_set_section_alignment (elfbfd, s, 2))
1165 {
1166 htab->eh_info.hdr_sec = s;
1167 warn_eh_frame = FALSE;
1168 }
1169 }
1170 if (warn_eh_frame)
1171 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1172 " --eh-frame-hdr ignored.\n");
1173 }
1174
1175 /* Get the list of files which appear in DT_NEEDED entries in
1176 dynamic objects included in the link (often there will be none).
1177 For each such file, we want to track down the corresponding
1178 library, and include the symbol table in the link. This is what
1179 the runtime dynamic linker will do. Tracking the files down here
1180 permits one dynamic object to include another without requiring
1181 special action by the person doing the link. Note that the
1182 needed list can actually grow while we are stepping through this
1183 loop. */
1184 if (!link_info.executable)
1185 return;
1186 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1187 for (l = needed; l != NULL; l = l->next)
1188 {
1189 struct bfd_link_needed_list *ll;
1190 struct dt_needed n, nn;
1191 int force;
1192
1193 /* If the lib that needs this one was --as-needed and wasn't
1194 found to be needed, then this lib isn't needed either. */
1195 if (l->by != NULL
1196 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1197 continue;
1198
1199 /* If we've already seen this file, skip it. */
1200 for (ll = needed; ll != l; ll = ll->next)
1201 if ((ll->by == NULL
1202 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1203 && strcmp (ll->name, l->name) == 0)
1204 break;
1205 if (ll != l)
1206 continue;
1207
1208 /* See if this file was included in the link explicitly. */
1209 global_needed = l;
1210 global_found = NULL;
1211 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1212 if (global_found != NULL
1213 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1214 & DYN_AS_NEEDED) == 0)
1215 continue;
1216
1217 n.by = l->by;
1218 n.name = l->name;
1219 nn.by = l->by;
1220 if (verbose)
1221 info_msg (_("%s needed by %B\n"), l->name, l->by);
1222
1223 /* As-needed libs specified on the command line (or linker script)
1224 take priority over libs found in search dirs. */
1225 if (global_found != NULL)
1226 {
1227 nn.name = global_found->filename;
1228 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1229 continue;
1230 }
1231
1232 /* We need to find this file and include the symbol table. We
1233 want to search for the file in the same way that the dynamic
1234 linker will search. That means that we want to use
1235 rpath_link, rpath, then the environment variable
1236 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1237 entries (native only), then the linker script LIB_SEARCH_DIRS.
1238 We do not search using the -L arguments.
1239
1240 We search twice. The first time, we skip objects which may
1241 introduce version mismatches. The second time, we force
1242 their use. See gld${EMULATION_NAME}_vercheck comment. */
1243 for (force = 0; force < 2; force++)
1244 {
1245 size_t len;
1246 search_dirs_type *search;
1247 EOF
1248 if [ "x${NATIVE}" = xyes ] ; then
1249 fragment <<EOF
1250 const char *lib_path;
1251 EOF
1252 fi
1253 if [ "x${USE_LIBPATH}" = xyes ] ; then
1254 fragment <<EOF
1255 struct bfd_link_needed_list *rp;
1256 int found;
1257 EOF
1258 fi
1259 fragment <<EOF
1260
1261 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1262 &n, force))
1263 break;
1264 EOF
1265 if [ "x${USE_LIBPATH}" = xyes ] ; then
1266 fragment <<EOF
1267 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1268 &n, force))
1269 break;
1270 EOF
1271 fi
1272 if [ "x${NATIVE}" = xyes ] ; then
1273 fragment <<EOF
1274 if (command_line.rpath_link == NULL
1275 && command_line.rpath == NULL)
1276 {
1277 lib_path = (const char *) getenv ("LD_RUN_PATH");
1278 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1279 force))
1280 break;
1281 }
1282 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1283 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1284 break;
1285 EOF
1286 fi
1287 if [ "x${USE_LIBPATH}" = xyes ] ; then
1288 fragment <<EOF
1289 found = 0;
1290 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1291 for (; !found && rp != NULL; rp = rp->next)
1292 {
1293 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1294 found = (rp->by == l->by
1295 && gld${EMULATION_NAME}_search_needed (tmpname,
1296 &n,
1297 force));
1298 free (tmpname);
1299 }
1300 if (found)
1301 break;
1302
1303 EOF
1304 fi
1305 if [ "x${USE_LIBPATH}" = xyes ] ; then
1306 case ${target} in
1307 *-*-freebsd* | *-*-dragonfly*)
1308 fragment <<EOF
1309 if (gld${EMULATION_NAME}_check_ld_elf_hints (l->name, force))
1310 break;
1311 EOF
1312 # FreeBSD
1313 ;;
1314
1315 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1316 # Linux
1317 fragment <<EOF
1318 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
1319 break;
1320
1321 EOF
1322 ;;
1323 esac
1324 fi
1325 fragment <<EOF
1326 len = strlen (l->name);
1327 for (search = search_head; search != NULL; search = search->next)
1328 {
1329 char *filename;
1330
1331 if (search->cmdline)
1332 continue;
1333 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1334 sprintf (filename, "%s/%s", search->name, l->name);
1335 nn.name = filename;
1336 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1337 break;
1338 free (filename);
1339 }
1340 if (search != NULL)
1341 break;
1342 EOF
1343 fragment <<EOF
1344 }
1345
1346 if (force < 2)
1347 continue;
1348
1349 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1350 l->name, l->by);
1351 }
1352 }
1353
1354 EOF
1355 fi
1356
1357 fragment <<EOF
1358
1359 /* Look through an expression for an assignment statement. */
1360
1361 static void
1362 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1363 {
1364 bfd_boolean provide = FALSE;
1365
1366 switch (exp->type.node_class)
1367 {
1368 case etree_provide:
1369 case etree_provided:
1370 provide = TRUE;
1371 /* Fall thru */
1372 case etree_assign:
1373 /* We call record_link_assignment even if the symbol is defined.
1374 This is because if it is defined by a dynamic object, we
1375 actually want to use the value defined by the linker script,
1376 not the value from the dynamic object (because we are setting
1377 symbols like etext). If the symbol is defined by a regular
1378 object, then, as it happens, calling record_link_assignment
1379 will do no harm. */
1380 if (strcmp (exp->assign.dst, ".") != 0)
1381 {
1382 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1383 &link_info,
1384 exp->assign.dst, provide,
1385 exp->assign.hidden))
1386 einfo ("%P%F: failed to record assignment to %s: %E\n",
1387 exp->assign.dst);
1388 }
1389 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1390 break;
1391
1392 case etree_binary:
1393 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1394 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1395 break;
1396
1397 case etree_trinary:
1398 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1399 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1400 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1401 break;
1402
1403 case etree_unary:
1404 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1405 break;
1406
1407 default:
1408 break;
1409 }
1410 }
1411
1412
1413 /* This is called by the before_allocation routine via
1414 lang_for_each_statement. It locates any assignment statements, and
1415 tells the ELF backend about them, in case they are assignments to
1416 symbols which are referred to by dynamic objects. */
1417
1418 static void
1419 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1420 {
1421 if (s->header.type == lang_assignment_statement_enum)
1422 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1423 }
1424
1425 EOF
1426
1427 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1428 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1429 ELF_INTERPRETER_SET_DEFAULT="
1430 if (sinterp != NULL)
1431 {
1432 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1433 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1434 }
1435
1436 "
1437 else
1438 ELF_INTERPRETER_SET_DEFAULT=
1439 fi
1440 fragment <<EOF
1441
1442 /* used by before_allocation and handle_option. */
1443 static void
1444 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1445 {
1446 if (*to == NULL)
1447 *to = xstrdup (op_arg);
1448 else
1449 {
1450 size_t to_len = strlen (*to);
1451 size_t op_arg_len = strlen (op_arg);
1452 char *buf;
1453 char *cp = *to;
1454
1455 /* First see whether OPTARG is already in the path. */
1456 do
1457 {
1458 if (strncmp (op_arg, cp, op_arg_len) == 0
1459 && (cp[op_arg_len] == 0
1460 || cp[op_arg_len] == config.rpath_separator))
1461 /* We found it. */
1462 break;
1463
1464 /* Not yet found. */
1465 cp = strchr (cp, config.rpath_separator);
1466 if (cp != NULL)
1467 ++cp;
1468 }
1469 while (cp != NULL);
1470
1471 if (cp == NULL)
1472 {
1473 buf = xmalloc (to_len + op_arg_len + 2);
1474 sprintf (buf, "%s%c%s", *to,
1475 config.rpath_separator, op_arg);
1476 free (*to);
1477 *to = buf;
1478 }
1479 }
1480 }
1481
1482 /* This is called after the sections have been attached to output
1483 sections, but before any sizes or addresses have been set. */
1484
1485 static void
1486 gld${EMULATION_NAME}_before_allocation (void)
1487 {
1488 const char *rpath;
1489 asection *sinterp;
1490 bfd *abfd;
1491
1492 if (link_info.hash->type == bfd_link_elf_hash_table)
1493 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1494
1495 /* If we are going to make any variable assignments, we need to let
1496 the ELF backend know about them in case the variables are
1497 referred to by dynamic objects. */
1498 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1499
1500 /* Let the ELF backend work out the sizes of any sections required
1501 by dynamic linking. */
1502 rpath = command_line.rpath;
1503 if (rpath == NULL)
1504 rpath = (const char *) getenv ("LD_RUN_PATH");
1505
1506 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1507 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1508 {
1509 const char *audit_libs = elf_dt_audit (abfd);
1510
1511 /* If the input bfd contains an audit entry, we need to add it as
1512 a dep audit entry. */
1513 if (audit_libs && *audit_libs != '\0')
1514 {
1515 char *cp = xstrdup (audit_libs);
1516 do
1517 {
1518 int more = 0;
1519 char *cp2 = strchr (cp, config.rpath_separator);
1520
1521 if (cp2)
1522 {
1523 *cp2 = '\0';
1524 more = 1;
1525 }
1526
1527 if (cp != NULL && *cp != '\0')
1528 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1529
1530 cp = more ? ++cp2 : NULL;
1531 }
1532 while (cp != NULL);
1533 }
1534 }
1535
1536 if (! (bfd_elf_size_dynamic_sections
1537 (link_info.output_bfd, command_line.soname, rpath,
1538 command_line.filter_shlib, audit, depaudit,
1539 (const char * const *) command_line.auxiliary_filters,
1540 &link_info, &sinterp)))
1541 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1542
1543 ${ELF_INTERPRETER_SET_DEFAULT}
1544 /* Let the user override the dynamic linker we are using. */
1545 if (command_line.interpreter != NULL
1546 && sinterp != NULL)
1547 {
1548 sinterp->contents = (bfd_byte *) command_line.interpreter;
1549 sinterp->size = strlen (command_line.interpreter) + 1;
1550 }
1551
1552 /* Look for any sections named .gnu.warning. As a GNU extensions,
1553 we treat such sections as containing warning messages. We print
1554 out the warning message, and then zero out the section size so
1555 that it does not get copied into the output file. */
1556
1557 {
1558 LANG_FOR_EACH_INPUT_STATEMENT (is)
1559 {
1560 asection *s;
1561 bfd_size_type sz;
1562 char *msg;
1563 bfd_boolean ret;
1564
1565 if (is->flags.just_syms)
1566 continue;
1567
1568 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1569 if (s == NULL)
1570 continue;
1571
1572 sz = s->size;
1573 msg = (char *) xmalloc ((size_t) (sz + 1));
1574 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1575 (file_ptr) 0, sz))
1576 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1577 is->the_bfd);
1578 msg[sz] = '\0';
1579 ret = link_info.callbacks->warning (&link_info, msg,
1580 (const char *) NULL,
1581 is->the_bfd, (asection *) NULL,
1582 (bfd_vma) 0);
1583 ASSERT (ret);
1584 free (msg);
1585
1586 /* Clobber the section size, so that we don't waste space
1587 copying the warning into the output file. If we've already
1588 sized the output section, adjust its size. The adjustment
1589 is on rawsize because targets that size sections early will
1590 have called lang_reset_memory_regions after sizing. */
1591 if (s->output_section != NULL
1592 && s->output_section->rawsize >= s->size)
1593 s->output_section->rawsize -= s->size;
1594
1595 s->size = 0;
1596
1597 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1598 warning section don't get copied to the output. */
1599 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1600 }
1601 }
1602
1603 before_allocation_default ();
1604
1605 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1606 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1607 }
1608
1609 EOF
1610 fi
1611
1612 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1613 fragment <<EOF
1614
1615 /* Try to open a dynamic archive. This is where we know that ELF
1616 dynamic libraries have an extension of .so (or .sl on oddball systems
1617 like hpux). */
1618
1619 static bfd_boolean
1620 gld${EMULATION_NAME}_open_dynamic_archive
1621 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1622 {
1623 const char *filename;
1624 char *string;
1625
1626 if (! entry->flags.maybe_archive)
1627 return FALSE;
1628
1629 filename = entry->filename;
1630
1631 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1632 is defined, but it does not seem worth the headache to optimize
1633 away those two bytes of space. */
1634 string = (char *) xmalloc (strlen (search->name)
1635 + strlen (filename)
1636 + strlen (arch)
1637 #ifdef EXTRA_SHLIB_EXTENSION
1638 + strlen (EXTRA_SHLIB_EXTENSION)
1639 #endif
1640 + sizeof "/lib.so");
1641
1642 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1643
1644 #ifdef EXTRA_SHLIB_EXTENSION
1645 /* Try the .so extension first. If that fails build a new filename
1646 using EXTRA_SHLIB_EXTENSION. */
1647 if (! ldfile_try_open_bfd (string, entry))
1648 {
1649 sprintf (string, "%s/lib%s%s%s", search->name,
1650 filename, arch, EXTRA_SHLIB_EXTENSION);
1651 #endif
1652
1653 if (! ldfile_try_open_bfd (string, entry))
1654 {
1655 free (string);
1656 return FALSE;
1657 }
1658 #ifdef EXTRA_SHLIB_EXTENSION
1659 }
1660 #endif
1661
1662 entry->filename = string;
1663
1664 /* We have found a dynamic object to include in the link. The ELF
1665 backend linker will create a DT_NEEDED entry in the .dynamic
1666 section naming this file. If this file includes a DT_SONAME
1667 entry, it will be used. Otherwise, the ELF linker will just use
1668 the name of the file. For an archive found by searching, like
1669 this one, the DT_NEEDED entry should consist of just the name of
1670 the file, without the path information used to find it. Note
1671 that we only need to do this if we have a dynamic object; an
1672 archive will never be referenced by a DT_NEEDED entry.
1673
1674 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1675 very pretty. I haven't been able to think of anything that is
1676 pretty, though. */
1677 if (bfd_check_format (entry->the_bfd, bfd_object)
1678 && (entry->the_bfd->flags & DYNAMIC) != 0)
1679 {
1680 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1681
1682 /* Rather than duplicating the logic above. Just use the
1683 filename we recorded earlier. */
1684
1685 filename = lbasename (entry->filename);
1686 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1687 }
1688
1689 return TRUE;
1690 }
1691
1692 EOF
1693 fi
1694
1695 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1696 fragment <<EOF
1697
1698 /* A variant of lang_output_section_find used by place_orphan. */
1699
1700 static lang_output_section_statement_type *
1701 output_rel_find (asection *sec, int isdyn)
1702 {
1703 lang_output_section_statement_type *lookup;
1704 lang_output_section_statement_type *last = NULL;
1705 lang_output_section_statement_type *last_alloc = NULL;
1706 lang_output_section_statement_type *last_ro_alloc = NULL;
1707 lang_output_section_statement_type *last_rel = NULL;
1708 lang_output_section_statement_type *last_rel_alloc = NULL;
1709 int rela = sec->name[4] == 'a';
1710
1711 for (lookup = &lang_output_section_statement.head->output_section_statement;
1712 lookup != NULL;
1713 lookup = lookup->next)
1714 {
1715 if (lookup->constraint >= 0
1716 && CONST_STRNEQ (lookup->name, ".rel"))
1717 {
1718 int lookrela = lookup->name[4] == 'a';
1719
1720 /* .rel.dyn must come before all other reloc sections, to suit
1721 GNU ld.so. */
1722 if (isdyn)
1723 break;
1724
1725 /* Don't place after .rel.plt as doing so results in wrong
1726 dynamic tags. */
1727 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1728 break;
1729
1730 if (rela == lookrela || last_rel == NULL)
1731 last_rel = lookup;
1732 if ((rela == lookrela || last_rel_alloc == NULL)
1733 && lookup->bfd_section != NULL
1734 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1735 last_rel_alloc = lookup;
1736 }
1737
1738 last = lookup;
1739 if (lookup->bfd_section != NULL
1740 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1741 {
1742 last_alloc = lookup;
1743 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1744 last_ro_alloc = lookup;
1745 }
1746 }
1747
1748 if (last_rel_alloc)
1749 return last_rel_alloc;
1750
1751 if (last_rel)
1752 return last_rel;
1753
1754 if (last_ro_alloc)
1755 return last_ro_alloc;
1756
1757 if (last_alloc)
1758 return last_alloc;
1759
1760 return last;
1761 }
1762
1763 /* Place an orphan section. We use this to put random SHF_ALLOC
1764 sections in the right segment. */
1765
1766 static lang_output_section_statement_type *
1767 gld${EMULATION_NAME}_place_orphan (asection *s,
1768 const char *secname,
1769 int constraint)
1770 {
1771 static struct orphan_save hold[] =
1772 {
1773 { ".text",
1774 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1775 0, 0, 0, 0 },
1776 { ".rodata",
1777 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1778 0, 0, 0, 0 },
1779 { ".data",
1780 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1781 0, 0, 0, 0 },
1782 { ".bss",
1783 SEC_ALLOC,
1784 0, 0, 0, 0 },
1785 { 0,
1786 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1787 0, 0, 0, 0 },
1788 { ".interp",
1789 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1790 0, 0, 0, 0 },
1791 { ".sdata",
1792 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1793 0, 0, 0, 0 },
1794 { ".comment",
1795 SEC_HAS_CONTENTS,
1796 0, 0, 0, 0 },
1797 };
1798 enum orphan_save_index
1799 {
1800 orphan_text = 0,
1801 orphan_rodata,
1802 orphan_data,
1803 orphan_bss,
1804 orphan_rel,
1805 orphan_interp,
1806 orphan_sdata,
1807 orphan_nonalloc
1808 };
1809 static int orphan_init_done = 0;
1810 struct orphan_save *place;
1811 lang_output_section_statement_type *after;
1812 lang_output_section_statement_type *os;
1813 lang_output_section_statement_type *match_by_name = NULL;
1814 int isdyn = 0;
1815 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1816 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1817
1818 if (! link_info.relocatable
1819 && link_info.combreloc
1820 && (s->flags & SEC_ALLOC))
1821 {
1822 if (iself)
1823 switch (sh_type)
1824 {
1825 case SHT_RELA:
1826 secname = ".rela.dyn";
1827 isdyn = 1;
1828 break;
1829 case SHT_REL:
1830 secname = ".rel.dyn";
1831 isdyn = 1;
1832 break;
1833 default:
1834 break;
1835 }
1836 else if (CONST_STRNEQ (secname, ".rel"))
1837 {
1838 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1839 isdyn = 1;
1840 }
1841 }
1842
1843 /* Look through the script to see where to place this section. */
1844 if (constraint == 0)
1845 for (os = lang_output_section_find (secname);
1846 os != NULL;
1847 os = next_matching_output_section_statement (os, 0))
1848 {
1849 /* If we don't match an existing output section, tell
1850 lang_insert_orphan to create a new output section. */
1851 constraint = SPECIAL;
1852
1853 if (os->bfd_section != NULL
1854 && (os->bfd_section->flags == 0
1855 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1856 os->bfd_section,
1857 s->owner, s)
1858 && ((s->flags ^ os->bfd_section->flags)
1859 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1860 {
1861 /* We already have an output section statement with this
1862 name, and its bfd section has compatible flags.
1863 If the section already exists but does not have any flags
1864 set, then it has been created by the linker, probably as a
1865 result of a --section-start command line switch. */
1866 lang_add_section (&os->children, s, NULL, os);
1867 return os;
1868 }
1869
1870 /* Save unused output sections in case we can match them
1871 against orphans later. */
1872 if (os->bfd_section == NULL)
1873 match_by_name = os;
1874 }
1875
1876 /* If we didn't match an active output section, see if we matched an
1877 unused one and use that. */
1878 if (match_by_name)
1879 {
1880 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1881 return match_by_name;
1882 }
1883
1884 if (!orphan_init_done)
1885 {
1886 struct orphan_save *ho;
1887
1888 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1889 if (ho->name != NULL)
1890 {
1891 ho->os = lang_output_section_find (ho->name);
1892 if (ho->os != NULL && ho->os->flags == 0)
1893 ho->os->flags = ho->flags;
1894 }
1895 orphan_init_done = 1;
1896 }
1897
1898 /* If this is a final link, then always put .gnu.warning.SYMBOL
1899 sections into the .text section to get them out of the way. */
1900 if (link_info.executable
1901 && ! link_info.relocatable
1902 && CONST_STRNEQ (s->name, ".gnu.warning.")
1903 && hold[orphan_text].os != NULL)
1904 {
1905 os = hold[orphan_text].os;
1906 lang_add_section (&os->children, s, NULL, os);
1907 return os;
1908 }
1909
1910 /* Decide which segment the section should go in based on the
1911 section name and section flags. We put loadable .note sections
1912 right after the .interp section, so that the PT_NOTE segment is
1913 stored right after the program headers where the OS can read it
1914 in the first page. */
1915
1916 place = NULL;
1917 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1918 place = &hold[orphan_nonalloc];
1919 else if ((s->flags & SEC_ALLOC) == 0)
1920 ;
1921 else if ((s->flags & SEC_LOAD) != 0
1922 && ((iself && sh_type == SHT_NOTE)
1923 || (!iself && CONST_STRNEQ (secname, ".note"))))
1924 place = &hold[orphan_interp];
1925 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1926 place = &hold[orphan_bss];
1927 else if ((s->flags & SEC_SMALL_DATA) != 0)
1928 place = &hold[orphan_sdata];
1929 else if ((s->flags & SEC_READONLY) == 0)
1930 place = &hold[orphan_data];
1931 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1932 || (!iself && CONST_STRNEQ (secname, ".rel")))
1933 && (s->flags & SEC_LOAD) != 0)
1934 place = &hold[orphan_rel];
1935 else if ((s->flags & SEC_CODE) == 0)
1936 place = &hold[orphan_rodata];
1937 else
1938 place = &hold[orphan_text];
1939
1940 after = NULL;
1941 if (place != NULL)
1942 {
1943 if (place->os == NULL)
1944 {
1945 if (place->name != NULL)
1946 place->os = lang_output_section_find (place->name);
1947 else
1948 place->os = output_rel_find (s, isdyn);
1949 }
1950 after = place->os;
1951 if (after == NULL)
1952 after = lang_output_section_find_by_flags
1953 (s, &place->os, _bfd_elf_match_sections_by_type);
1954 if (after == NULL)
1955 /* *ABS* is always the first output section statement. */
1956 after = &lang_output_section_statement.head->output_section_statement;
1957 }
1958
1959 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1960 }
1961 EOF
1962 fi
1963
1964 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1965 fragment <<EOF
1966
1967 static void
1968 gld${EMULATION_NAME}_after_allocation (void)
1969 {
1970 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1971 &link_info);
1972 gld${EMULATION_NAME}_map_segments (need_layout);
1973 }
1974 EOF
1975 fi
1976
1977 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1978 fragment <<EOF
1979
1980 static char *
1981 gld${EMULATION_NAME}_get_script (int *isfile)
1982 EOF
1983
1984 if test -n "$COMPILE_IN"
1985 then
1986 # Scripts compiled in.
1987
1988 # sed commands to quote an ld script as a C string.
1989 sc="-f stringify.sed"
1990
1991 fragment <<EOF
1992 {
1993 *isfile = 0;
1994
1995 if (link_info.relocatable && config.build_constructors)
1996 return
1997 EOF
1998 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1999 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
2000 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2001 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2002 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2003 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2004 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2005 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2006 fi
2007 if test -n "$GENERATE_PIE_SCRIPT" ; then
2008 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2009 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2010 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2011 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2012 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2013 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2014 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2015 fi
2016 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2017 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2018 fi
2019 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2020 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2021 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2022 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2023 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2024 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2025 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2026 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2027 fi
2028 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2029 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2030 fi
2031 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2032 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2033 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2034 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2035 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2036 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2037 fi
2038 echo ' ; else return' >> e${EMULATION_NAME}.c
2039 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2040 echo '; }' >> e${EMULATION_NAME}.c
2041
2042 else
2043 # Scripts read from the filesystem.
2044
2045 fragment <<EOF
2046 {
2047 *isfile = 1;
2048
2049 if (link_info.relocatable && config.build_constructors)
2050 return "ldscripts/${EMULATION_NAME}.xu";
2051 else if (link_info.relocatable)
2052 return "ldscripts/${EMULATION_NAME}.xr";
2053 else if (!config.text_read_only)
2054 return "ldscripts/${EMULATION_NAME}.xbn";
2055 EOF
2056 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2057 else
2058 fragment <<EOF
2059 else if (!config.magic_demand_paged)
2060 return "ldscripts/${EMULATION_NAME}.xn";
2061 EOF
2062 fi
2063 if test -n "$GENERATE_PIE_SCRIPT" ; then
2064 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2065 fragment <<EOF
2066 else if (link_info.pie && link_info.combreloc
2067 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2068 return "ldscripts/${EMULATION_NAME}.xdw";
2069 else if (link_info.pie && link_info.combreloc)
2070 return "ldscripts/${EMULATION_NAME}.xdc";
2071 EOF
2072 fi
2073 fragment <<EOF
2074 else if (link_info.pie)
2075 return "ldscripts/${EMULATION_NAME}.xd";
2076 EOF
2077 fi
2078 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2079 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2080 fragment <<EOF
2081 else if (link_info.shared && link_info.combreloc
2082 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2083 return "ldscripts/${EMULATION_NAME}.xsw";
2084 else if (link_info.shared && link_info.combreloc)
2085 return "ldscripts/${EMULATION_NAME}.xsc";
2086 EOF
2087 fi
2088 fragment <<EOF
2089 else if (link_info.shared)
2090 return "ldscripts/${EMULATION_NAME}.xs";
2091 EOF
2092 fi
2093 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2094 fragment <<EOF
2095 else if (link_info.combreloc && link_info.relro
2096 && (link_info.flags & DF_BIND_NOW))
2097 return "ldscripts/${EMULATION_NAME}.xw";
2098 else if (link_info.combreloc)
2099 return "ldscripts/${EMULATION_NAME}.xc";
2100 EOF
2101 fi
2102 fragment <<EOF
2103 else
2104 return "ldscripts/${EMULATION_NAME}.x";
2105 }
2106
2107 EOF
2108 fi
2109 fi
2110
2111 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2112 fragment <<EOF
2113 $PARSE_AND_LIST_PROLOGUE
2114 EOF
2115 fi
2116
2117 fragment <<EOF
2118
2119 #define OPTION_DISABLE_NEW_DTAGS (400)
2120 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2121 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2122 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2123 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2124 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2125 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2126 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2127
2128 static void
2129 gld${EMULATION_NAME}_add_options
2130 (int ns, char **shortopts, int nl, struct option **longopts,
2131 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2132 {
2133 EOF
2134 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2135 fragment <<EOF
2136 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2137 EOF
2138 else
2139 fragment <<EOF
2140 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2141 EOF
2142 fi
2143 fragment <<EOF
2144 static const struct option xtra_long[] = {
2145 EOF
2146 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2147 fragment <<EOF
2148 {"audit", required_argument, NULL, OPTION_AUDIT},
2149 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2150 EOF
2151 fi
2152 fragment <<EOF
2153 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2154 EOF
2155 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2156 fragment <<EOF
2157 {"depaudit", required_argument, NULL, 'P'},
2158 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2159 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2160 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2161 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2162 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2163 EOF
2164 fi
2165 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2166 fragment <<EOF
2167 $PARSE_AND_LIST_LONGOPTS
2168 EOF
2169 fi
2170 fragment <<EOF
2171 {NULL, no_argument, NULL, 0}
2172 };
2173
2174 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2175 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2176 *longopts = (struct option *)
2177 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2178 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2179 }
2180
2181 #define DEFAULT_BUILD_ID_STYLE "sha1"
2182
2183 static bfd_boolean
2184 gld${EMULATION_NAME}_handle_option (int optc)
2185 {
2186 switch (optc)
2187 {
2188 default:
2189 return FALSE;
2190
2191 case OPTION_BUILD_ID:
2192 if (link_info.emit_note_gnu_build_id != NULL)
2193 {
2194 free (link_info.emit_note_gnu_build_id);
2195 link_info.emit_note_gnu_build_id = NULL;
2196 }
2197 if (optarg == NULL)
2198 optarg = DEFAULT_BUILD_ID_STYLE;
2199 if (strcmp (optarg, "none"))
2200 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2201 break;
2202
2203 EOF
2204
2205 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2206 fragment <<EOF
2207 case OPTION_AUDIT:
2208 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2209 break;
2210
2211 case 'P':
2212 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2213 break;
2214
2215 case OPTION_DISABLE_NEW_DTAGS:
2216 link_info.new_dtags = FALSE;
2217 break;
2218
2219 case OPTION_ENABLE_NEW_DTAGS:
2220 link_info.new_dtags = TRUE;
2221 break;
2222
2223 case OPTION_EH_FRAME_HDR:
2224 link_info.eh_frame_hdr = TRUE;
2225 break;
2226
2227 case OPTION_GROUP:
2228 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2229 /* Groups must be self-contained. */
2230 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2231 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2232 break;
2233
2234 case OPTION_EXCLUDE_LIBS:
2235 add_excluded_libs (optarg);
2236 break;
2237
2238 case OPTION_HASH_STYLE:
2239 link_info.emit_hash = FALSE;
2240 link_info.emit_gnu_hash = FALSE;
2241 if (strcmp (optarg, "sysv") == 0)
2242 link_info.emit_hash = TRUE;
2243 else if (strcmp (optarg, "gnu") == 0)
2244 link_info.emit_gnu_hash = TRUE;
2245 else if (strcmp (optarg, "both") == 0)
2246 {
2247 link_info.emit_hash = TRUE;
2248 link_info.emit_gnu_hash = TRUE;
2249 }
2250 else
2251 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2252 break;
2253
2254 EOF
2255 fi
2256 fragment <<EOF
2257 case 'z':
2258 if (strcmp (optarg, "defs") == 0)
2259 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2260 else if (strcmp (optarg, "muldefs") == 0)
2261 link_info.allow_multiple_definition = TRUE;
2262 else if (CONST_STRNEQ (optarg, "max-page-size="))
2263 {
2264 char *end;
2265
2266 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2267 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2268 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2269 optarg + 14);
2270 }
2271 else if (CONST_STRNEQ (optarg, "common-page-size="))
2272 {
2273 char *end;
2274 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2275 if (*end
2276 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2277 einfo (_("%P%F: invalid common page size \`%s'\n"),
2278 optarg + 17);
2279 }
2280 else if (CONST_STRNEQ (optarg, "stack-size="))
2281 {
2282 char *end;
2283 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2284 if (*end || link_info.stacksize < 0)
2285 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2286 if (!link_info.stacksize)
2287 /* Use -1 for explicit no-stack, because zero means
2288 'default'. */
2289 link_info.stacksize = -1;
2290 }
2291 else if (strcmp (optarg, "execstack") == 0)
2292 {
2293 link_info.execstack = TRUE;
2294 link_info.noexecstack = FALSE;
2295 }
2296 else if (strcmp (optarg, "noexecstack") == 0)
2297 {
2298 link_info.noexecstack = TRUE;
2299 link_info.execstack = FALSE;
2300 }
2301 EOF
2302 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2303 fragment <<EOF
2304 else if (strcmp (optarg, "global") == 0)
2305 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2306 else if (strcmp (optarg, "initfirst") == 0)
2307 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2308 else if (strcmp (optarg, "interpose") == 0)
2309 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2310 else if (strcmp (optarg, "loadfltr") == 0)
2311 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2312 else if (strcmp (optarg, "nodefaultlib") == 0)
2313 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2314 else if (strcmp (optarg, "nodelete") == 0)
2315 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2316 else if (strcmp (optarg, "nodlopen") == 0)
2317 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2318 else if (strcmp (optarg, "nodump") == 0)
2319 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2320 else if (strcmp (optarg, "now") == 0)
2321 {
2322 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2323 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2324 }
2325 else if (strcmp (optarg, "lazy") == 0)
2326 {
2327 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2328 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2329 }
2330 else if (strcmp (optarg, "origin") == 0)
2331 {
2332 link_info.flags |= (bfd_vma) DF_ORIGIN;
2333 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2334 }
2335 else if (strcmp (optarg, "combreloc") == 0)
2336 link_info.combreloc = TRUE;
2337 else if (strcmp (optarg, "nocombreloc") == 0)
2338 link_info.combreloc = FALSE;
2339 else if (strcmp (optarg, "nocopyreloc") == 0)
2340 link_info.nocopyreloc = TRUE;
2341 else if (strcmp (optarg, "relro") == 0)
2342 link_info.relro = TRUE;
2343 else if (strcmp (optarg, "norelro") == 0)
2344 link_info.relro = FALSE;
2345 else if (strcmp (optarg, "text") == 0)
2346 link_info.error_textrel = TRUE;
2347 else if (strcmp (optarg, "notext") == 0)
2348 link_info.error_textrel = FALSE;
2349 else if (strcmp (optarg, "textoff") == 0)
2350 link_info.error_textrel = FALSE;
2351 EOF
2352 fi
2353
2354 fragment <<EOF
2355 else
2356 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2357 break;
2358 EOF
2359
2360 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2361 fragment <<EOF
2362 $PARSE_AND_LIST_ARGS_CASES
2363 EOF
2364 fi
2365
2366 fragment <<EOF
2367 }
2368
2369 return TRUE;
2370 }
2371
2372 EOF
2373
2374 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2375 fragment <<EOF
2376
2377 static void
2378 gld${EMULATION_NAME}_list_options (FILE * file)
2379 {
2380 EOF
2381 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2382 fragment <<EOF
2383 fprintf (file, _("\
2384 --audit=AUDITLIB Specify a library to use for auditing\n"));
2385 fprintf (file, _("\
2386 -Bgroup Selects group name lookup rules for DSO\n"));
2387 EOF
2388 fi
2389 fragment <<EOF
2390 fprintf (file, _("\
2391 --build-id[=STYLE] Generate build ID note\n"));
2392 EOF
2393 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2394 fragment <<EOF
2395 fprintf (file, _("\
2396 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2397 Specify a library to use for auditing dependencies\n"));
2398 fprintf (file, _("\
2399 --disable-new-dtags Disable new dynamic tags\n"));
2400 fprintf (file, _("\
2401 --enable-new-dtags Enable new dynamic tags\n"));
2402 fprintf (file, _("\
2403 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2404 fprintf (file, _("\
2405 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2406 fprintf (file, _("\
2407 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2408 fprintf (file, _("\
2409 -z combreloc Merge dynamic relocs into one section and sort\n"));
2410 EOF
2411 fi
2412
2413 fragment <<EOF
2414 fprintf (file, _("\
2415 -z common-page-size=SIZE Set common page size to SIZE\n"));
2416 fprintf (file, _("\
2417 -z defs Report unresolved symbols in object files.\n"));
2418 fprintf (file, _("\
2419 -z execstack Mark executable as requiring executable stack\n"));
2420 EOF
2421
2422 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2423 fragment <<EOF
2424 fprintf (file, _("\
2425 -z global Make symbols in DSO available for subsequently\n\
2426 loaded objects\n"));
2427 fprintf (file, _("\
2428 -z initfirst Mark DSO to be initialized first at runtime\n"));
2429 fprintf (file, _("\
2430 -z interpose Mark object to interpose all DSOs but executable\n"));
2431 fprintf (file, _("\
2432 -z lazy Mark object lazy runtime binding (default)\n"));
2433 fprintf (file, _("\
2434 -z loadfltr Mark object requiring immediate process\n"));
2435 EOF
2436 fi
2437
2438 fragment <<EOF
2439 fprintf (file, _("\
2440 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2441 fprintf (file, _("\
2442 -z muldefs Allow multiple definitions\n"));
2443 EOF
2444
2445 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2446 fragment <<EOF
2447 fprintf (file, _("\
2448 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2449 fprintf (file, _("\
2450 -z nocopyreloc Don't create copy relocs\n"));
2451 fprintf (file, _("\
2452 -z nodefaultlib Mark object not to use default search paths\n"));
2453 fprintf (file, _("\
2454 -z nodelete Mark DSO non-deletable at runtime\n"));
2455 fprintf (file, _("\
2456 -z nodlopen Mark DSO not available to dlopen\n"));
2457 fprintf (file, _("\
2458 -z nodump Mark DSO not available to dldump\n"));
2459 EOF
2460 fi
2461 fragment <<EOF
2462 fprintf (file, _("\
2463 -z noexecstack Mark executable as not requiring executable stack\n"));
2464 EOF
2465 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2466 fragment <<EOF
2467 fprintf (file, _("\
2468 -z norelro Don't create RELRO program header\n"));
2469 fprintf (file, _("\
2470 -z now Mark object non-lazy runtime binding\n"));
2471 fprintf (file, _("\
2472 -z origin Mark object requiring immediate \$ORIGIN\n\
2473 processing at runtime\n"));
2474 fprintf (file, _("\
2475 -z relro Create RELRO program header\n"));
2476 fprintf (file, _("\
2477 -z stacksize=SIZE Set size of stack segment\n"));
2478 EOF
2479 fi
2480
2481 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2482 fragment <<EOF
2483 $PARSE_AND_LIST_OPTIONS
2484 EOF
2485 fi
2486
2487 fragment <<EOF
2488 }
2489 EOF
2490
2491 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2492 fragment <<EOF
2493 $PARSE_AND_LIST_EPILOGUE
2494 EOF
2495 fi
2496 fi
2497
2498 fragment <<EOF
2499
2500 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2501 {
2502 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2503 ${LDEMUL_SYSLIB-syslib_default},
2504 ${LDEMUL_HLL-hll_default},
2505 ${LDEMUL_AFTER_PARSE-after_parse_default},
2506 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2507 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2508 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2509 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2510 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2511 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2512 "${EMULATION_NAME}",
2513 "${OUTPUT_FORMAT}",
2514 ${LDEMUL_FINISH-finish_default},
2515 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2516 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2517 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2518 ${LDEMUL_SET_SYMBOLS-NULL},
2519 ${LDEMUL_PARSE_ARGS-NULL},
2520 gld${EMULATION_NAME}_add_options,
2521 gld${EMULATION_NAME}_handle_option,
2522 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2523 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2524 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2525 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2526 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2527 };
2528 EOF
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