2007-07-13 Roland McGrath <roland@redhat.com>
[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}:${MACHINE}
10 fi
11 cat >e${EMULATION_NAME}.c <<EOF
12 /* This file is is generated by a shell script. DO NOT EDIT! */
13
14 /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
17 Written by Steve Chamberlain <sac@cygnus.com>
18 ELF support by Ian Lance Taylor <ian@cygnus.com>
19
20 This file is part of the GNU Binutils.
21
22 This program is free software; you can redistribute it and/or modify
23 it under the terms of the GNU General Public License as published by
24 the Free Software Foundation; either version 3 of the License, or
25 (at your option) any later version.
26
27 This program is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 GNU General Public License for more details.
31
32 You should have received a copy of the GNU General Public License
33 along with this program; if not, write to the Free Software
34 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
35 MA 02110-1301, USA. */
36
37 #define TARGET_IS_${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${EMULATION_NAME}_before_allocation (void);
65 static bfd_boolean gld${EMULATION_NAME}_place_orphan (asection *s);
66 static void gld${EMULATION_NAME}_finish (void);
67
68 EOF
69
70 if [ "x${USE_LIBPATH}" = xyes ] ; then
71 case ${target} in
72 *-*-linux-* | *-*-k*bsd*-*)
73 cat >>e${EMULATION_NAME}.c <<EOF
74 #ifdef HAVE_GLOB
75 #include <glob.h>
76 #endif
77 EOF
78 ;;
79 esac
80 fi
81
82 # Import any needed special functions and/or overrides.
83 #
84 . ${srcdir}/emultempl/elf-generic.em
85 if test -n "$EXTRA_EM_FILE" ; then
86 . ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
87 fi
88
89 # Functions in this file can be overridden by setting the LDEMUL_* shell
90 # variables. If the name of the overriding function is the same as is
91 # defined in this file, then don't output this file's version.
92 # If a different overriding name is given then output the standard function
93 # as presumably it is called from the overriding function.
94 #
95 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
96 cat >>e${EMULATION_NAME}.c <<EOF
97
98 static void
99 gld${EMULATION_NAME}_before_parse (void)
100 {
101 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
102 config.dynamic_link = ${DYNAMIC_LINK-TRUE};
103 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
104 }
105
106 EOF
107 fi
108
109 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
110 cat >>e${EMULATION_NAME}.c <<EOF
111 /* Handle as_needed DT_NEEDED. */
112
113 static bfd_boolean
114 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
115 {
116 int class = 0;
117
118 /* Tell the ELF linker that we don't want the output file to have a
119 DT_NEEDED entry for this file, unless it is used to resolve
120 references in a regular object. */
121 if (entry->as_needed)
122 class = DYN_AS_NEEDED;
123
124 /* Tell the ELF linker that we don't want the output file to have a
125 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
126 this file at all. */
127 if (!entry->add_needed)
128 class |= DYN_NO_ADD_NEEDED;
129
130 if (entry->just_syms_flag
131 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
132 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
133 entry->the_bfd);
134
135 if (!class
136 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
137 return FALSE;
138
139 bfd_elf_set_dyn_lib_class (entry->the_bfd, class);
140
141 /* Continue on with normal load_symbols processing. */
142 return FALSE;
143 }
144 EOF
145 fi
146
147 cat >>e${EMULATION_NAME}.c <<EOF
148
149 /* These variables are required to pass information back and forth
150 between after_open and check_needed and stat_needed and vercheck. */
151
152 static struct bfd_link_needed_list *global_needed;
153 static struct stat global_stat;
154 static lang_input_statement_type *global_found;
155 static struct bfd_link_needed_list *global_vercheck_needed;
156 static bfd_boolean global_vercheck_failed;
157
158
159 /* On Linux, it's possible to have different versions of the same
160 shared library linked against different versions of libc. The
161 dynamic linker somehow tags which libc version to use in
162 /etc/ld.so.cache, and, based on the libc that it sees in the
163 executable, chooses which version of the shared library to use.
164
165 We try to do a similar check here by checking whether this shared
166 library needs any other shared libraries which may conflict with
167 libraries we have already included in the link. If it does, we
168 skip it, and try to find another shared library farther on down the
169 link path.
170
171 This is called via lang_for_each_input_file.
172 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
173 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
174 a conflicting version. */
175
176 static void
177 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
178 {
179 const char *soname;
180 struct bfd_link_needed_list *l;
181
182 if (global_vercheck_failed)
183 return;
184 if (s->the_bfd == NULL
185 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
186 return;
187
188 soname = bfd_elf_get_dt_soname (s->the_bfd);
189 if (soname == NULL)
190 soname = lbasename (bfd_get_filename (s->the_bfd));
191
192 for (l = global_vercheck_needed; l != NULL; l = l->next)
193 {
194 const char *suffix;
195
196 if (strcmp (soname, l->name) == 0)
197 {
198 /* Probably can't happen, but it's an easy check. */
199 continue;
200 }
201
202 if (strchr (l->name, '/') != NULL)
203 continue;
204
205 suffix = strstr (l->name, ".so.");
206 if (suffix == NULL)
207 continue;
208
209 suffix += sizeof ".so." - 1;
210
211 if (strncmp (soname, l->name, suffix - l->name) == 0)
212 {
213 /* Here we know that S is a dynamic object FOO.SO.VER1, and
214 the object we are considering needs a dynamic object
215 FOO.SO.VER2, and VER1 and VER2 are different. This
216 appears to be a version mismatch, so we tell the caller
217 to try a different version of this library. */
218 global_vercheck_failed = TRUE;
219 return;
220 }
221 }
222 }
223
224
225 /* See if an input file matches a DT_NEEDED entry by running stat on
226 the file. */
227
228 static void
229 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
230 {
231 struct stat st;
232 const char *suffix;
233 const char *soname;
234
235 if (global_found != NULL)
236 return;
237 if (s->the_bfd == NULL)
238 return;
239
240 /* If this input file was an as-needed entry, and wasn't found to be
241 needed at the stage it was linked, then don't say we have loaded it. */
242 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
243 return;
244
245 if (bfd_stat (s->the_bfd, &st) != 0)
246 {
247 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
248 return;
249 }
250
251 /* Some operating systems, e.g. Windows, do not provide a meaningful
252 st_ino; they always set it to zero. (Windows does provide a
253 meaningful st_dev.) Do not indicate a duplicate library in that
254 case. While there is no guarantee that a system that provides
255 meaningful inode numbers will never set st_ino to zero, this is
256 merely an optimization, so we do not need to worry about false
257 negatives. */
258 if (st.st_dev == global_stat.st_dev
259 && st.st_ino == global_stat.st_ino
260 && st.st_ino != 0)
261 {
262 global_found = s;
263 return;
264 }
265
266 /* We issue a warning if it looks like we are including two
267 different versions of the same shared library. For example,
268 there may be a problem if -lc picks up libc.so.6 but some other
269 shared library has a DT_NEEDED entry of libc.so.5. This is a
270 heuristic test, and it will only work if the name looks like
271 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
272 If we really want to issue warnings about mixing version numbers
273 of shared libraries, we need to find a better way. */
274
275 if (strchr (global_needed->name, '/') != NULL)
276 return;
277 suffix = strstr (global_needed->name, ".so.");
278 if (suffix == NULL)
279 return;
280 suffix += sizeof ".so." - 1;
281
282 soname = bfd_elf_get_dt_soname (s->the_bfd);
283 if (soname == NULL)
284 soname = lbasename (s->filename);
285
286 if (strncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
287 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
288 global_needed->name, global_needed->by, soname);
289 }
290
291 struct dt_needed
292 {
293 bfd *by;
294 const char *name;
295 };
296
297 /* This function is called for each possible name for a dynamic object
298 named by a DT_NEEDED entry. The FORCE parameter indicates whether
299 to skip the check for a conflicting version. */
300
301 static bfd_boolean
302 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
303 int force)
304 {
305 bfd *abfd;
306 const char *name = needed->name;
307 const char *soname;
308 int class;
309
310 abfd = bfd_openr (name, bfd_get_target (output_bfd));
311 if (abfd == NULL)
312 return FALSE;
313 if (! bfd_check_format (abfd, bfd_object))
314 {
315 bfd_close (abfd);
316 return FALSE;
317 }
318 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
319 {
320 bfd_close (abfd);
321 return FALSE;
322 }
323
324 /* For DT_NEEDED, they have to match. */
325 if (abfd->xvec != output_bfd->xvec)
326 {
327 bfd_close (abfd);
328 return FALSE;
329 }
330
331 /* Check whether this object would include any conflicting library
332 versions. If FORCE is set, then we skip this check; we use this
333 the second time around, if we couldn't find any compatible
334 instance of the shared library. */
335
336 if (! force)
337 {
338 struct bfd_link_needed_list *needed;
339
340 if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
341 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
342
343 if (needed != NULL)
344 {
345 global_vercheck_needed = needed;
346 global_vercheck_failed = FALSE;
347 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
348 if (global_vercheck_failed)
349 {
350 bfd_close (abfd);
351 /* Return FALSE to force the caller to move on to try
352 another file on the search path. */
353 return FALSE;
354 }
355
356 /* But wait! It gets much worse. On Linux, if a shared
357 library does not use libc at all, we are supposed to skip
358 it the first time around in case we encounter a shared
359 library later on with the same name which does use the
360 version of libc that we want. This is much too horrible
361 to use on any system other than Linux. */
362
363 EOF
364 case ${target} in
365 *-*-linux-* | *-*-k*bsd*-*)
366 cat >>e${EMULATION_NAME}.c <<EOF
367 {
368 struct bfd_link_needed_list *l;
369
370 for (l = needed; l != NULL; l = l->next)
371 if (CONST_STRNEQ (l->name, "libc.so"))
372 break;
373 if (l == NULL)
374 {
375 bfd_close (abfd);
376 return FALSE;
377 }
378 }
379
380 EOF
381 ;;
382 esac
383 cat >>e${EMULATION_NAME}.c <<EOF
384 }
385 }
386
387 /* We've found a dynamic object matching the DT_NEEDED entry. */
388
389 /* We have already checked that there is no other input file of the
390 same name. We must now check again that we are not including the
391 same file twice. We need to do this because on many systems
392 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
393 reference libc.so.1. If we have already included libc.so, we
394 don't want to include libc.so.1 if they are the same file, and we
395 can only check that using stat. */
396
397 if (bfd_stat (abfd, &global_stat) != 0)
398 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
399
400 /* First strip off everything before the last '/'. */
401 soname = lbasename (abfd->filename);
402
403 if (trace_file_tries)
404 info_msg (_("found %s at %s\n"), soname, name);
405
406 global_found = NULL;
407 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
408 if (global_found != NULL)
409 {
410 /* Return TRUE to indicate that we found the file, even though
411 we aren't going to do anything with it. */
412 return TRUE;
413 }
414
415 /* Specify the soname to use. */
416 bfd_elf_set_dt_needed_name (abfd, soname);
417
418 /* Tell the ELF linker that we don't want the output file to have a
419 DT_NEEDED entry for this file, unless it is used to resolve
420 references in a regular object. */
421 class = DYN_DT_NEEDED;
422
423 /* Tell the ELF linker that we don't want the output file to have a
424 DT_NEEDED entry for this file at all if the entry is from a file
425 with DYN_NO_ADD_NEEDED. */
426 if (needed->by != NULL
427 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
428 class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
429
430 bfd_elf_set_dyn_lib_class (abfd, class);
431
432 /* Add this file into the symbol table. */
433 if (! bfd_link_add_symbols (abfd, &link_info))
434 einfo ("%F%B: could not read symbols: %E\n", abfd);
435
436 return TRUE;
437 }
438
439
440 /* Search for a needed file in a path. */
441
442 static bfd_boolean
443 gld${EMULATION_NAME}_search_needed (const char *path,
444 struct dt_needed *n, int force)
445 {
446 const char *s;
447 const char *name = n->name;
448 size_t len;
449 struct dt_needed needed;
450
451 if (name[0] == '/')
452 return gld${EMULATION_NAME}_try_needed (n, force);
453
454 if (path == NULL || *path == '\0')
455 return FALSE;
456
457 needed.by = n->by;
458 needed.name = n->name;
459
460 len = strlen (name);
461 while (1)
462 {
463 char *filename, *sset;
464
465 s = strchr (path, config.rpath_separator);
466 if (s == NULL)
467 s = path + strlen (path);
468
469 filename = (char *) xmalloc (s - path + len + 2);
470 if (s == path)
471 sset = filename;
472 else
473 {
474 memcpy (filename, path, s - path);
475 filename[s - path] = '/';
476 sset = filename + (s - path) + 1;
477 }
478 strcpy (sset, name);
479
480 needed.name = filename;
481 if (gld${EMULATION_NAME}_try_needed (&needed, force))
482 return TRUE;
483
484 free (filename);
485
486 if (*s == '\0')
487 break;
488 path = s + 1;
489 }
490
491 return FALSE;
492 }
493
494 EOF
495 if [ "x${USE_LIBPATH}" = xyes ] ; then
496 cat >>e${EMULATION_NAME}.c <<EOF
497
498 /* Add the sysroot to every entry in a path separated by
499 config.rpath_separator. */
500
501 static char *
502 gld${EMULATION_NAME}_add_sysroot (const char *path)
503 {
504 int len, colons, i;
505 char *ret, *p;
506
507 len = strlen (path);
508 colons = 0;
509 i = 0;
510 while (path[i])
511 if (path[i++] == config.rpath_separator)
512 colons++;
513
514 if (path[i])
515 colons++;
516
517 len = len + (colons + 1) * strlen (ld_sysroot);
518 ret = xmalloc (len + 1);
519 strcpy (ret, ld_sysroot);
520 p = ret + strlen (ret);
521 i = 0;
522 while (path[i])
523 if (path[i] == config.rpath_separator)
524 {
525 *p++ = path[i++];
526 strcpy (p, ld_sysroot);
527 p = p + strlen (p);
528 }
529 else
530 *p++ = path[i++];
531
532 *p = 0;
533 return ret;
534 }
535
536 EOF
537 case ${target} in
538 *-*-freebsd* | *-*-dragonfly*)
539 cat >>e${EMULATION_NAME}.c <<EOF
540 /* Read the system search path the FreeBSD way rather than the Linux way. */
541 #ifdef HAVE_ELF_HINTS_H
542 #include <elf-hints.h>
543 #else
544 #include "elf-hints-local.h"
545 #endif
546
547 static bfd_boolean
548 gld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force)
549 {
550 static bfd_boolean initialized;
551 static char *ld_elf_hints;
552 struct dt_needed needed;
553
554 if (!initialized)
555 {
556 FILE *f;
557 char *tmppath;
558
559 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, NULL);
560 f = fopen (tmppath, FOPEN_RB);
561 free (tmppath);
562 if (f != NULL)
563 {
564 struct elfhints_hdr hdr;
565
566 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
567 && hdr.magic == ELFHINTS_MAGIC
568 && hdr.version == 1)
569 {
570 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
571 {
572 char *b;
573
574 b = xmalloc (hdr.dirlistlen + 1);
575 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
576 hdr.dirlistlen + 1)
577 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
578
579 free (b);
580 }
581 }
582 fclose (f);
583 }
584
585 initialized = TRUE;
586 }
587
588 if (ld_elf_hints == NULL)
589 return FALSE;
590
591 needed.by = NULL;
592 needed.name = name;
593 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,
594 force);
595 }
596 EOF
597 # FreeBSD
598 ;;
599
600 *-*-linux-* | *-*-k*bsd*-*)
601 cat >>e${EMULATION_NAME}.c <<EOF
602 /* For a native linker, check the file /etc/ld.so.conf for directories
603 in which we may find shared libraries. /etc/ld.so.conf is really
604 only meaningful on Linux. */
605
606 struct gld${EMULATION_NAME}_ld_so_conf
607 {
608 char *path;
609 size_t len, alloc;
610 };
611
612 static bfd_boolean
613 gld${EMULATION_NAME}_parse_ld_so_conf
614 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
615
616 static void
617 gld${EMULATION_NAME}_parse_ld_so_conf_include
618 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
619 const char *pattern)
620 {
621 char *newp = NULL;
622 #ifdef HAVE_GLOB
623 glob_t gl;
624 #endif
625
626 if (pattern[0] != '/')
627 {
628 char *p = strrchr (filename, '/');
629 size_t patlen = strlen (pattern) + 1;
630
631 newp = xmalloc (p - filename + 1 + patlen);
632 memcpy (newp, filename, p - filename + 1);
633 memcpy (newp + (p - filename + 1), pattern, patlen);
634 pattern = newp;
635 }
636
637 #ifdef HAVE_GLOB
638 if (glob (pattern, 0, NULL, &gl) == 0)
639 {
640 size_t i;
641
642 for (i = 0; i < gl.gl_pathc; ++i)
643 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
644 globfree (&gl);
645 }
646 #else
647 /* If we do not have glob, treat the pattern as a literal filename. */
648 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
649 #endif
650
651 if (newp)
652 free (newp);
653 }
654
655 static bfd_boolean
656 gld${EMULATION_NAME}_parse_ld_so_conf
657 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
658 {
659 FILE *f = fopen (filename, FOPEN_RT);
660 char *line;
661 size_t linelen;
662
663 if (f == NULL)
664 return FALSE;
665
666 linelen = 256;
667 line = xmalloc (linelen);
668 do
669 {
670 char *p = line, *q;
671
672 /* Normally this would use getline(3), but we need to be portable. */
673 while ((q = fgets (p, linelen - (p - line), f)) != NULL
674 && strlen (q) == linelen - (p - line) - 1
675 && line[linelen - 2] != '\n')
676 {
677 line = xrealloc (line, 2 * linelen);
678 p = line + linelen - 1;
679 linelen += linelen;
680 }
681
682 if (q == NULL && p == line)
683 break;
684
685 p = strchr (line, '\n');
686 if (p)
687 *p = '\0';
688
689 /* Because the file format does not know any form of quoting we
690 can search forward for the next '#' character and if found
691 make it terminating the line. */
692 p = strchr (line, '#');
693 if (p)
694 *p = '\0';
695
696 /* Remove leading whitespace. NUL is no whitespace character. */
697 p = line;
698 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
699 ++p;
700
701 /* If the line is blank it is ignored. */
702 if (p[0] == '\0')
703 continue;
704
705 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
706 {
707 char *dir, c;
708 p += 8;
709 do
710 {
711 while (*p == ' ' || *p == '\t')
712 ++p;
713
714 if (*p == '\0')
715 break;
716
717 dir = p;
718
719 while (*p != ' ' && *p != '\t' && *p)
720 ++p;
721
722 c = *p;
723 *p++ = '\0';
724 if (dir[0] != '\0')
725 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
726 dir);
727 }
728 while (c != '\0');
729 }
730 else
731 {
732 char *dir = p;
733 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
734 && *p != '\r' && *p != '\v')
735 ++p;
736
737 while (p != dir && p[-1] == '/')
738 --p;
739 if (info->path == NULL)
740 {
741 info->alloc = p - dir + 1 + 256;
742 info->path = xmalloc (info->alloc);
743 info->len = 0;
744 }
745 else
746 {
747 if (info->len + 1 + (p - dir) >= info->alloc)
748 {
749 info->alloc += p - dir + 256;
750 info->path = xrealloc (info->path, info->alloc);
751 }
752 info->path[info->len++] = config.rpath_separator;
753 }
754 memcpy (info->path + info->len, dir, p - dir);
755 info->len += p - dir;
756 info->path[info->len] = '\0';
757 }
758 }
759 while (! feof (f));
760 free (line);
761 fclose (f);
762 return TRUE;
763 }
764
765 static bfd_boolean
766 gld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force)
767 {
768 static bfd_boolean initialized;
769 static char *ld_so_conf;
770 struct dt_needed needed;
771
772 if (! initialized)
773 {
774 char *tmppath;
775 struct gld${EMULATION_NAME}_ld_so_conf info;
776
777 info.path = NULL;
778 info.len = info.alloc = 0;
779 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf", NULL);
780 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
781 {
782 free (tmppath);
783 tmppath = concat (ld_sysroot, "/etc/ld.so.conf", NULL);
784 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
785 }
786 free (tmppath);
787
788 if (info.path)
789 {
790 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
791 free (info.path);
792 ld_so_conf = d;
793 }
794 initialized = TRUE;
795 }
796
797 if (ld_so_conf == NULL)
798 return FALSE;
799
800
801 needed.by = NULL;
802 needed.name = name;
803 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
804 }
805
806 EOF
807 # Linux
808 ;;
809 esac
810 fi
811 cat >>e${EMULATION_NAME}.c <<EOF
812
813 /* See if an input file matches a DT_NEEDED entry by name. */
814
815 static void
816 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
817 {
818 const char *soname;
819
820 /* Stop looking if we've found a loaded lib. */
821 if (global_found != NULL
822 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
823 & DYN_AS_NEEDED) == 0)
824 return;
825
826 if (s->filename == NULL || s->the_bfd == NULL)
827 return;
828
829 /* Don't look for a second non-loaded as-needed lib. */
830 if (global_found != NULL
831 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
832 return;
833
834 if (strcmp (s->filename, global_needed->name) == 0)
835 {
836 global_found = s;
837 return;
838 }
839
840 if (s->search_dirs_flag)
841 {
842 const char *f = strrchr (s->filename, '/');
843 if (f != NULL
844 && strcmp (f + 1, global_needed->name) == 0)
845 {
846 global_found = s;
847 return;
848 }
849 }
850
851 soname = bfd_elf_get_dt_soname (s->the_bfd);
852 if (soname != NULL
853 && strcmp (soname, global_needed->name) == 0)
854 {
855 global_found = s;
856 return;
857 }
858 }
859
860 EOF
861
862 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
863 cat >>e${EMULATION_NAME}.c <<EOF
864
865 static bfd_size_type
866 gld${EMULATION_NAME}_id_note_section_size (bfd *abfd,
867 struct bfd_link_info *link_info)
868 {
869 const char *style = link_info->emit_note_gnu_build_id;
870 bfd_size_type size;
871
872 abfd = abfd;
873
874 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
875 size = (size + 3) & -(bfd_size_type) 4;
876
877 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
878 size += 128 / 8;
879 else if (!strcmp (style, "sha1"))
880 size += 160 / 8;
881 else if (!strncmp (style, "0x", 2))
882 {
883 /* ID is in string form (hex). Convert to bits. */
884 const char *id = style + 2;
885 do
886 {
887 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
888 {
889 ++size;
890 id += 2;
891 }
892 else if (*id == '-' || *id == ':')
893 ++id;
894 else
895 {
896 size = 0;
897 break;
898 }
899 } while (*id != '\0');
900 }
901 else
902 size = 0;
903
904 return size;
905 }
906
907 static unsigned char
908 read_hex (const char xdigit)
909 {
910 if (ISDIGIT (xdigit))
911 return xdigit - '0';
912 if (ISUPPER (xdigit))
913 return xdigit - 'A' + 0xa;
914 if (ISLOWER (xdigit))
915 return xdigit - 'a' + 0xa;
916 abort ();
917 return 0;
918 }
919
920 struct build_id_info
921 {
922 const char *style;
923 asection *sec;
924 };
925
926 static bfd_boolean
927 gld${EMULATION_NAME}_write_build_id_section (bfd *abfd)
928 {
929 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
930 struct build_id_info *info =
931 elf_tdata (abfd)->after_write_object_contents_info;
932 asection *asec;
933 Elf_Internal_Shdr *i_shdr;
934 unsigned char *contents, *id_bits;
935 bfd_size_type size;
936 Elf_External_Note *e_note;
937
938 asec = info->sec;
939 if (asec->output_section == NULL)
940 {
941 einfo (_("%P: .note.gnu.build-id section missing"));
942 return FALSE;
943 }
944 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
945
946 if (i_shdr->contents == NULL)
947 {
948 ASSERT (asec->output_offset == 0);
949 i_shdr->contents = xcalloc (i_shdr->sh_size, 1);
950 if (i_shdr->contents == NULL)
951 return FALSE;
952 }
953 contents = i_shdr->contents + asec->output_offset;
954
955 e_note = (void *) contents;
956 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
957 size = (size + 3) & -(bfd_size_type) 4;
958 id_bits = contents + size;
959 size = asec->size - size;
960
961 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
962 bfd_h_put_32 (abfd, size, &e_note->descsz);
963 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
964 memcpy (e_note->name, "GNU", sizeof "GNU");
965
966 if (!strcmp (info->style, "md5"))
967 {
968 struct md5_ctx ctx;
969 md5_init_ctx (&ctx);
970 if (bed->s->checksum_contents (abfd,
971 (void (*) (const void *, size_t, void *))
972 &md5_process_bytes,
973 &ctx))
974 md5_finish_ctx (&ctx, id_bits);
975 else
976 return FALSE;
977 }
978 else if (!strcmp (info->style, "sha1"))
979 {
980 struct sha1_ctx ctx;
981 sha1_init_ctx (&ctx);
982 if (bed->s->checksum_contents (abfd,
983 (void (*) (const void *, size_t, void *))
984 &sha1_process_bytes,
985 &ctx))
986 sha1_finish_ctx (&ctx, id_bits);
987 else
988 return FALSE;
989 }
990 else if (!strcmp (info->style, "uuid"))
991 {
992 int n;
993 int fd = open ("/dev/urandom", O_RDONLY);
994 if (fd < 0)
995 return FALSE;
996 n = read (fd, id_bits, size);
997 close (fd);
998 if (n < (int) size)
999 return FALSE;
1000 }
1001 else if (!strncmp (info->style, "0x", 2))
1002 {
1003 /* ID is in string form (hex). Convert to bits. */
1004 const char *id = info->style + 2;
1005 size_t n = 0;
1006 do
1007 {
1008 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1009 {
1010 id_bits[n] = read_hex (*id++) << 4;
1011 id_bits[n++] |= read_hex (*id++);
1012 }
1013 else if (*id == '-' || *id == ':')
1014 ++id;
1015 else
1016 abort (); /* Should have been validated earlier. */
1017 } while (*id != '\0');
1018 }
1019 else
1020 abort (); /* Should have been validated earlier. */
1021
1022 size = i_shdr->sh_size;
1023 return (bfd_seek (abfd, i_shdr->sh_offset, SEEK_SET) == 0
1024 && bfd_bwrite (i_shdr->contents, size, abfd) == size);
1025 }
1026
1027
1028 /* This is called after all the input files have been opened. */
1029
1030 static void
1031 gld${EMULATION_NAME}_after_open (void)
1032 {
1033 struct bfd_link_needed_list *needed, *l;
1034
1035 if (link_info.emit_note_gnu_build_id)
1036 {
1037 bfd *abfd;
1038 asection *s;
1039 bfd_size_type size;
1040
1041 abfd = link_info.input_bfds;
1042
1043 size = gld${EMULATION_NAME}_id_note_section_size (abfd, &link_info);
1044 if (size == 0)
1045 {
1046 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1047 free (link_info.emit_note_gnu_build_id);
1048 link_info.emit_note_gnu_build_id = NULL;
1049 }
1050 else
1051 {
1052 s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id",
1053 SEC_ALLOC | SEC_LOAD
1054 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1055 | SEC_READONLY | SEC_DATA);
1056 if (s != NULL && bfd_set_section_alignment (abfd, s, 2))
1057 {
1058 struct elf_obj_tdata *t = elf_tdata (output_bfd);
1059 struct build_id_info *b = xmalloc (sizeof *b);
1060 b->style = link_info.emit_note_gnu_build_id;
1061 b->sec = s;
1062 elf_section_type (s) = SHT_NOTE;
1063 s->size = size;
1064 t->after_write_object_contents
1065 = &gld${EMULATION_NAME}_write_build_id_section;
1066 t->after_write_object_contents_info = b;
1067 }
1068 else
1069 {
1070 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1071 " --build-id ignored.\n");
1072 free (link_info.emit_note_gnu_build_id);
1073 link_info.emit_note_gnu_build_id = NULL;
1074 }
1075 }
1076 }
1077
1078 if (link_info.eh_frame_hdr
1079 && ! link_info.traditional_format
1080 && ! link_info.relocatable)
1081 {
1082 struct elf_link_hash_table *htab;
1083
1084 htab = elf_hash_table (&link_info);
1085 if (is_elf_hash_table (htab))
1086 {
1087 bfd *abfd;
1088 asection *s;
1089
1090 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1091 {
1092 s = bfd_get_section_by_name (abfd, ".eh_frame");
1093 if (s && s->size > 8 && !bfd_is_abs_section (s->output_section))
1094 break;
1095 }
1096 if (abfd)
1097 {
1098 const struct elf_backend_data *bed;
1099
1100 bed = get_elf_backend_data (abfd);
1101 s = bfd_make_section_with_flags (abfd, ".eh_frame_hdr",
1102 bed->dynamic_sec_flags
1103 | SEC_READONLY);
1104 if (s != NULL
1105 && bfd_set_section_alignment (abfd, s, 2))
1106 htab->eh_info.hdr_sec = s;
1107 else
1108 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1109 " --eh-frame-hdr ignored.\n");
1110 }
1111 }
1112 }
1113
1114 /* We only need to worry about this when doing a final link. */
1115 if (link_info.relocatable || !link_info.executable)
1116 return;
1117
1118 /* Get the list of files which appear in DT_NEEDED entries in
1119 dynamic objects included in the link (often there will be none).
1120 For each such file, we want to track down the corresponding
1121 library, and include the symbol table in the link. This is what
1122 the runtime dynamic linker will do. Tracking the files down here
1123 permits one dynamic object to include another without requiring
1124 special action by the person doing the link. Note that the
1125 needed list can actually grow while we are stepping through this
1126 loop. */
1127 needed = bfd_elf_get_needed_list (output_bfd, &link_info);
1128 for (l = needed; l != NULL; l = l->next)
1129 {
1130 struct bfd_link_needed_list *ll;
1131 struct dt_needed n, nn;
1132 int force;
1133
1134 /* If the lib that needs this one was --as-needed and wasn't
1135 found to be needed, then this lib isn't needed either. */
1136 if (l->by != NULL
1137 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1138 continue;
1139
1140 /* If we've already seen this file, skip it. */
1141 for (ll = needed; ll != l; ll = ll->next)
1142 if ((ll->by == NULL
1143 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1144 && strcmp (ll->name, l->name) == 0)
1145 break;
1146 if (ll != l)
1147 continue;
1148
1149 /* See if this file was included in the link explicitly. */
1150 global_needed = l;
1151 global_found = NULL;
1152 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1153 if (global_found != NULL
1154 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1155 & DYN_AS_NEEDED) == 0)
1156 continue;
1157
1158 n.by = l->by;
1159 n.name = l->name;
1160 nn.by = l->by;
1161 if (trace_file_tries)
1162 info_msg (_("%s needed by %B\n"), l->name, l->by);
1163
1164 /* As-needed libs specified on the command line (or linker script)
1165 take priority over libs found in search dirs. */
1166 if (global_found != NULL)
1167 {
1168 nn.name = global_found->filename;
1169 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1170 continue;
1171 }
1172
1173 /* We need to find this file and include the symbol table. We
1174 want to search for the file in the same way that the dynamic
1175 linker will search. That means that we want to use
1176 rpath_link, rpath, then the environment variable
1177 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1178 entries (native only), then the linker script LIB_SEARCH_DIRS.
1179 We do not search using the -L arguments.
1180
1181 We search twice. The first time, we skip objects which may
1182 introduce version mismatches. The second time, we force
1183 their use. See gld${EMULATION_NAME}_vercheck comment. */
1184 for (force = 0; force < 2; force++)
1185 {
1186 size_t len;
1187 search_dirs_type *search;
1188 EOF
1189 if [ "x${NATIVE}" = xyes ] ; then
1190 cat >>e${EMULATION_NAME}.c <<EOF
1191 const char *lib_path;
1192 EOF
1193 fi
1194 if [ "x${USE_LIBPATH}" = xyes ] ; then
1195 cat >>e${EMULATION_NAME}.c <<EOF
1196 struct bfd_link_needed_list *rp;
1197 int found;
1198 EOF
1199 fi
1200 cat >>e${EMULATION_NAME}.c <<EOF
1201
1202 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1203 &n, force))
1204 break;
1205 EOF
1206 if [ "x${USE_LIBPATH}" = xyes ] ; then
1207 cat >>e${EMULATION_NAME}.c <<EOF
1208 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1209 &n, force))
1210 break;
1211 EOF
1212 fi
1213 if [ "x${NATIVE}" = xyes ] ; then
1214 cat >>e${EMULATION_NAME}.c <<EOF
1215 if (command_line.rpath_link == NULL
1216 && command_line.rpath == NULL)
1217 {
1218 lib_path = (const char *) getenv ("LD_RUN_PATH");
1219 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1220 force))
1221 break;
1222 }
1223 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1224 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1225 break;
1226 EOF
1227 fi
1228 if [ "x${USE_LIBPATH}" = xyes ] ; then
1229 cat >>e${EMULATION_NAME}.c <<EOF
1230 found = 0;
1231 rp = bfd_elf_get_runpath_list (output_bfd, &link_info);
1232 for (; !found && rp != NULL; rp = rp->next)
1233 {
1234 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1235 found = (rp->by == l->by
1236 && gld${EMULATION_NAME}_search_needed (tmpname,
1237 &n,
1238 force));
1239 free (tmpname);
1240 }
1241 if (found)
1242 break;
1243
1244 EOF
1245 fi
1246 if [ "x${USE_LIBPATH}" = xyes ] ; then
1247 case ${target} in
1248 *-*-freebsd* | *-*-dragonfly*)
1249 cat >>e${EMULATION_NAME}.c <<EOF
1250 if (gld${EMULATION_NAME}_check_ld_elf_hints (l->name, force))
1251 break;
1252 EOF
1253 # FreeBSD
1254 ;;
1255
1256 *-*-linux-* | *-*-k*bsd*-*)
1257 # Linux
1258 cat >>e${EMULATION_NAME}.c <<EOF
1259 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
1260 break;
1261
1262 EOF
1263 ;;
1264 esac
1265 fi
1266 cat >>e${EMULATION_NAME}.c <<EOF
1267 len = strlen (l->name);
1268 for (search = search_head; search != NULL; search = search->next)
1269 {
1270 char *filename;
1271
1272 if (search->cmdline)
1273 continue;
1274 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1275 sprintf (filename, "%s/%s", search->name, l->name);
1276 nn.name = filename;
1277 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1278 break;
1279 free (filename);
1280 }
1281 if (search != NULL)
1282 break;
1283 EOF
1284 cat >>e${EMULATION_NAME}.c <<EOF
1285 }
1286
1287 if (force < 2)
1288 continue;
1289
1290 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1291 l->name, l->by);
1292 }
1293 }
1294
1295 EOF
1296 fi
1297
1298 cat >>e${EMULATION_NAME}.c <<EOF
1299
1300 /* Look through an expression for an assignment statement. */
1301
1302 static void
1303 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1304 {
1305 bfd_boolean provide = FALSE;
1306
1307 switch (exp->type.node_class)
1308 {
1309 case etree_provide:
1310 provide = TRUE;
1311 /* Fall thru */
1312 case etree_assign:
1313 /* We call record_link_assignment even if the symbol is defined.
1314 This is because if it is defined by a dynamic object, we
1315 actually want to use the value defined by the linker script,
1316 not the value from the dynamic object (because we are setting
1317 symbols like etext). If the symbol is defined by a regular
1318 object, then, as it happens, calling record_link_assignment
1319 will do no harm. */
1320 if (strcmp (exp->assign.dst, ".") != 0)
1321 {
1322 if (!bfd_elf_record_link_assignment (output_bfd, &link_info,
1323 exp->assign.dst, provide,
1324 exp->assign.hidden))
1325 einfo ("%P%F: failed to record assignment to %s: %E\n",
1326 exp->assign.dst);
1327 }
1328 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1329 break;
1330
1331 case etree_binary:
1332 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1333 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1334 break;
1335
1336 case etree_trinary:
1337 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1338 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1339 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1340 break;
1341
1342 case etree_unary:
1343 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1344 break;
1345
1346 default:
1347 break;
1348 }
1349 }
1350
1351
1352 /* This is called by the before_allocation routine via
1353 lang_for_each_statement. It locates any assignment statements, and
1354 tells the ELF backend about them, in case they are assignments to
1355 symbols which are referred to by dynamic objects. */
1356
1357 static void
1358 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1359 {
1360 if (s->header.type == lang_assignment_statement_enum)
1361 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1362 }
1363
1364 EOF
1365
1366 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1367 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1368 ELF_INTERPRETER_SET_DEFAULT="
1369 if (sinterp != NULL)
1370 {
1371 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1372 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1373 }
1374
1375 "
1376 else
1377 ELF_INTERPRETER_SET_DEFAULT=
1378 fi
1379 cat >>e${EMULATION_NAME}.c <<EOF
1380
1381 /* This is called after the sections have been attached to output
1382 sections, but before any sizes or addresses have been set. */
1383
1384 static void
1385 gld${EMULATION_NAME}_before_allocation (void)
1386 {
1387 const char *rpath;
1388 asection *sinterp;
1389
1390 if (link_info.hash->type == bfd_link_elf_hash_table)
1391 _bfd_elf_tls_setup (output_bfd, &link_info);
1392
1393 /* If we are going to make any variable assignments, we need to let
1394 the ELF backend know about them in case the variables are
1395 referred to by dynamic objects. */
1396 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1397
1398 /* Let the ELF backend work out the sizes of any sections required
1399 by dynamic linking. */
1400 rpath = command_line.rpath;
1401 if (rpath == NULL)
1402 rpath = (const char *) getenv ("LD_RUN_PATH");
1403 if (! (bfd_elf_size_dynamic_sections
1404 (output_bfd, command_line.soname, rpath,
1405 command_line.filter_shlib,
1406 (const char * const *) command_line.auxiliary_filters,
1407 &link_info, &sinterp, lang_elf_version_info)))
1408 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1409
1410 ${ELF_INTERPRETER_SET_DEFAULT}
1411 /* Let the user override the dynamic linker we are using. */
1412 if (command_line.interpreter != NULL
1413 && sinterp != NULL)
1414 {
1415 sinterp->contents = (bfd_byte *) command_line.interpreter;
1416 sinterp->size = strlen (command_line.interpreter) + 1;
1417 }
1418
1419 /* Look for any sections named .gnu.warning. As a GNU extensions,
1420 we treat such sections as containing warning messages. We print
1421 out the warning message, and then zero out the section size so
1422 that it does not get copied into the output file. */
1423
1424 {
1425 LANG_FOR_EACH_INPUT_STATEMENT (is)
1426 {
1427 asection *s;
1428 bfd_size_type sz;
1429 char *msg;
1430 bfd_boolean ret;
1431
1432 if (is->just_syms_flag)
1433 continue;
1434
1435 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1436 if (s == NULL)
1437 continue;
1438
1439 sz = s->size;
1440 msg = xmalloc ((size_t) (sz + 1));
1441 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1442 (file_ptr) 0, sz))
1443 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1444 is->the_bfd);
1445 msg[sz] = '\0';
1446 ret = link_info.callbacks->warning (&link_info, msg,
1447 (const char *) NULL,
1448 is->the_bfd, (asection *) NULL,
1449 (bfd_vma) 0);
1450 ASSERT (ret);
1451 free (msg);
1452
1453 /* Clobber the section size, so that we don't waste space
1454 copying the warning into the output file. If we've already
1455 sized the output section, adjust its size. The adjustment
1456 is on rawsize because targets that size sections early will
1457 have called lang_reset_memory_regions after sizing. */
1458 if (s->output_section != NULL
1459 && s->output_section->rawsize >= s->size)
1460 s->output_section->rawsize -= s->size;
1461
1462 s->size = 0;
1463
1464 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1465 warning section don't get copied to the output. */
1466 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1467 }
1468 }
1469
1470 before_allocation_default ();
1471
1472 if (!bfd_elf_size_dynsym_hash_dynstr (output_bfd, &link_info))
1473 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1474 }
1475
1476 EOF
1477 fi
1478
1479 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1480 cat >>e${EMULATION_NAME}.c <<EOF
1481
1482 /* Try to open a dynamic archive. This is where we know that ELF
1483 dynamic libraries have an extension of .so (or .sl on oddball systems
1484 like hpux). */
1485
1486 static bfd_boolean
1487 gld${EMULATION_NAME}_open_dynamic_archive
1488 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1489 {
1490 const char *filename;
1491 char *string;
1492
1493 if (! entry->is_archive)
1494 return FALSE;
1495
1496 filename = entry->filename;
1497
1498 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1499 is defined, but it does not seem worth the headache to optimize
1500 away those two bytes of space. */
1501 string = (char *) xmalloc (strlen (search->name)
1502 + strlen (filename)
1503 + strlen (arch)
1504 #ifdef EXTRA_SHLIB_EXTENSION
1505 + strlen (EXTRA_SHLIB_EXTENSION)
1506 #endif
1507 + sizeof "/lib.so");
1508
1509 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1510
1511 #ifdef EXTRA_SHLIB_EXTENSION
1512 /* Try the .so extension first. If that fails build a new filename
1513 using EXTRA_SHLIB_EXTENSION. */
1514 if (! ldfile_try_open_bfd (string, entry))
1515 sprintf (string, "%s/lib%s%s%s", search->name,
1516 filename, arch, EXTRA_SHLIB_EXTENSION);
1517 #endif
1518
1519 if (! ldfile_try_open_bfd (string, entry))
1520 {
1521 free (string);
1522 return FALSE;
1523 }
1524
1525 entry->filename = string;
1526
1527 /* We have found a dynamic object to include in the link. The ELF
1528 backend linker will create a DT_NEEDED entry in the .dynamic
1529 section naming this file. If this file includes a DT_SONAME
1530 entry, it will be used. Otherwise, the ELF linker will just use
1531 the name of the file. For an archive found by searching, like
1532 this one, the DT_NEEDED entry should consist of just the name of
1533 the file, without the path information used to find it. Note
1534 that we only need to do this if we have a dynamic object; an
1535 archive will never be referenced by a DT_NEEDED entry.
1536
1537 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1538 very pretty. I haven't been able to think of anything that is
1539 pretty, though. */
1540 if (bfd_check_format (entry->the_bfd, bfd_object)
1541 && (entry->the_bfd->flags & DYNAMIC) != 0)
1542 {
1543 ASSERT (entry->is_archive && entry->search_dirs_flag);
1544
1545 /* Rather than duplicating the logic above. Just use the
1546 filename we recorded earlier. */
1547
1548 filename = lbasename (entry->filename);
1549 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1550 }
1551
1552 return TRUE;
1553 }
1554
1555 EOF
1556 fi
1557
1558 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1559 cat >>e${EMULATION_NAME}.c <<EOF
1560
1561 /* A variant of lang_output_section_find used by place_orphan. */
1562
1563 static lang_output_section_statement_type *
1564 output_rel_find (asection *sec, int isdyn)
1565 {
1566 lang_output_section_statement_type *lookup;
1567 lang_output_section_statement_type *last = NULL;
1568 lang_output_section_statement_type *last_alloc = NULL;
1569 lang_output_section_statement_type *last_rel = NULL;
1570 lang_output_section_statement_type *last_rel_alloc = NULL;
1571 int rela = sec->name[4] == 'a';
1572
1573 for (lookup = &lang_output_section_statement.head->output_section_statement;
1574 lookup != NULL;
1575 lookup = lookup->next)
1576 {
1577 if (lookup->constraint != -1
1578 && CONST_STRNEQ (lookup->name, ".rel"))
1579 {
1580 int lookrela = lookup->name[4] == 'a';
1581
1582 /* .rel.dyn must come before all other reloc sections, to suit
1583 GNU ld.so. */
1584 if (isdyn)
1585 break;
1586
1587 /* Don't place after .rel.plt as doing so results in wrong
1588 dynamic tags. */
1589 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1590 break;
1591
1592 if (rela == lookrela || last_rel == NULL)
1593 last_rel = lookup;
1594 if ((rela == lookrela || last_rel_alloc == NULL)
1595 && lookup->bfd_section != NULL
1596 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1597 last_rel_alloc = lookup;
1598 }
1599
1600 last = lookup;
1601 if (lookup->bfd_section != NULL
1602 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1603 last_alloc = lookup;
1604 }
1605
1606 if (last_rel_alloc)
1607 return last_rel_alloc;
1608
1609 if (last_rel)
1610 return last_rel;
1611
1612 if (last_alloc)
1613 return last_alloc;
1614
1615 return last;
1616 }
1617
1618 /* Place an orphan section. We use this to put random SHF_ALLOC
1619 sections in the right segment. */
1620
1621 static bfd_boolean
1622 gld${EMULATION_NAME}_place_orphan (asection *s)
1623 {
1624 static struct orphan_save hold[] =
1625 {
1626 { ".text",
1627 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1628 0, 0, 0, 0 },
1629 { ".rodata",
1630 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1631 0, 0, 0, 0 },
1632 { ".data",
1633 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1634 0, 0, 0, 0 },
1635 { ".bss",
1636 SEC_ALLOC,
1637 0, 0, 0, 0 },
1638 { 0,
1639 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1640 0, 0, 0, 0 },
1641 { ".interp",
1642 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1643 0, 0, 0, 0 },
1644 { ".sdata",
1645 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1646 0, 0, 0, 0 }
1647 };
1648 enum orphan_save_index
1649 {
1650 orphan_text = 0,
1651 orphan_rodata,
1652 orphan_data,
1653 orphan_bss,
1654 orphan_rel,
1655 orphan_interp,
1656 orphan_sdata
1657 };
1658 static int orphan_init_done = 0;
1659 struct orphan_save *place;
1660 const char *secname;
1661 lang_output_section_statement_type *after;
1662 lang_output_section_statement_type *os;
1663 int isdyn = 0;
1664 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1665 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1666
1667 secname = bfd_get_section_name (s->owner, s);
1668
1669 if (! link_info.relocatable
1670 && link_info.combreloc
1671 && (s->flags & SEC_ALLOC))
1672 {
1673 if (iself)
1674 switch (sh_type)
1675 {
1676 case SHT_RELA:
1677 secname = ".rela.dyn";
1678 isdyn = 1;
1679 break;
1680 case SHT_REL:
1681 secname = ".rel.dyn";
1682 isdyn = 1;
1683 break;
1684 default:
1685 break;
1686 }
1687 else if (CONST_STRNEQ (secname, ".rel"))
1688 {
1689 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1690 isdyn = 1;
1691 }
1692 }
1693
1694 if (isdyn || (!config.unique_orphan_sections && !unique_section_p (s)))
1695 {
1696 /* Look through the script to see where to place this section. */
1697 os = lang_output_section_find (secname);
1698
1699 if (os != NULL
1700 && (os->bfd_section == NULL
1701 || os->bfd_section->flags == 0
1702 || (_bfd_elf_match_sections_by_type (output_bfd,
1703 os->bfd_section,
1704 s->owner, s)
1705 && ((s->flags ^ os->bfd_section->flags)
1706 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1707 {
1708 /* We already have an output section statement with this
1709 name, and its bfd section, if any, has compatible flags.
1710 If the section already exists but does not have any flags
1711 set, then it has been created by the linker, probably as a
1712 result of a --section-start command line switch. */
1713 lang_add_section (&os->children, s, os);
1714 return TRUE;
1715 }
1716 }
1717
1718 if (!orphan_init_done)
1719 {
1720 struct orphan_save *ho;
1721 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1722 if (ho->name != NULL)
1723 {
1724 ho->os = lang_output_section_find (ho->name);
1725 if (ho->os != NULL && ho->os->flags == 0)
1726 ho->os->flags = ho->flags;
1727 }
1728 orphan_init_done = 1;
1729 }
1730
1731 /* If this is a final link, then always put .gnu.warning.SYMBOL
1732 sections into the .text section to get them out of the way. */
1733 if (link_info.executable
1734 && ! link_info.relocatable
1735 && CONST_STRNEQ (secname, ".gnu.warning.")
1736 && hold[orphan_text].os != NULL)
1737 {
1738 lang_add_section (&hold[orphan_text].os->children, s,
1739 hold[orphan_text].os);
1740 return TRUE;
1741 }
1742
1743 /* Decide which segment the section should go in based on the
1744 section name and section flags. We put loadable .note sections
1745 right after the .interp section, so that the PT_NOTE segment is
1746 stored right after the program headers where the OS can read it
1747 in the first page. */
1748
1749 place = NULL;
1750 if ((s->flags & SEC_ALLOC) == 0)
1751 ;
1752 else if ((s->flags & SEC_LOAD) != 0
1753 && ((iself && sh_type == SHT_NOTE)
1754 || (!iself && CONST_STRNEQ (secname, ".note"))))
1755 place = &hold[orphan_interp];
1756 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
1757 place = &hold[orphan_bss];
1758 else if ((s->flags & SEC_SMALL_DATA) != 0)
1759 place = &hold[orphan_sdata];
1760 else if ((s->flags & SEC_READONLY) == 0)
1761 place = &hold[orphan_data];
1762 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1763 || (!iself && CONST_STRNEQ (secname, ".rel")))
1764 && (s->flags & SEC_LOAD) != 0)
1765 place = &hold[orphan_rel];
1766 else if ((s->flags & SEC_CODE) == 0)
1767 place = &hold[orphan_rodata];
1768 else
1769 place = &hold[orphan_text];
1770
1771 after = NULL;
1772 if (place != NULL)
1773 {
1774 if (place->os == NULL)
1775 {
1776 if (place->name != NULL)
1777 place->os = lang_output_section_find (place->name);
1778 else
1779 place->os = output_rel_find (s, isdyn);
1780 }
1781 after = place->os;
1782 if (after == NULL)
1783 after = lang_output_section_find_by_flags
1784 (s, &place->os, _bfd_elf_match_sections_by_type);
1785 if (after == NULL)
1786 /* *ABS* is always the first output section statement. */
1787 after = &lang_output_section_statement.head->output_section_statement;
1788 }
1789
1790 /* Choose a unique name for the section. This will be needed if the
1791 same section name appears in the input file with different
1792 loadable or allocatable characteristics. */
1793 if (bfd_get_section_by_name (output_bfd, secname) != NULL)
1794 {
1795 static int count = 1;
1796 secname = bfd_get_unique_section_name (output_bfd, secname, &count);
1797 if (secname == NULL)
1798 einfo ("%F%P: place_orphan failed: %E\n");
1799 }
1800
1801 lang_insert_orphan (s, secname, after, place, NULL, NULL);
1802
1803 return TRUE;
1804 }
1805 EOF
1806 fi
1807
1808 if test x"$LDEMUL_FINISH" != xgld"$EMULATION_NAME"_finish; then
1809 cat >>e${EMULATION_NAME}.c <<EOF
1810
1811 static void
1812 gld${EMULATION_NAME}_finish (void)
1813 {
1814 bfd_boolean need_layout = bfd_elf_discard_info (output_bfd, &link_info);
1815
1816 gld${EMULATION_NAME}_map_segments (need_layout);
1817 finish_default ();
1818 }
1819 EOF
1820 fi
1821
1822 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1823 cat >>e${EMULATION_NAME}.c <<EOF
1824
1825 static char *
1826 gld${EMULATION_NAME}_get_script (int *isfile)
1827 EOF
1828
1829 if test -n "$COMPILE_IN"
1830 then
1831 # Scripts compiled in.
1832
1833 # sed commands to quote an ld script as a C string.
1834 sc="-f stringify.sed"
1835
1836 cat >>e${EMULATION_NAME}.c <<EOF
1837 {
1838 *isfile = 0;
1839
1840 if (link_info.relocatable && config.build_constructors)
1841 return
1842 EOF
1843 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1844 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1845 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1846 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1847 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1848 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1849 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1850 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1851 fi
1852 if test -n "$GENERATE_PIE_SCRIPT" ; then
1853 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1854 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
1855 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1856 echo ' && (link_info.flags & DT_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1857 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
1858 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1859 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
1860 fi
1861 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
1862 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
1863 fi
1864 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1865 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1866 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
1867 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1868 echo ' && (link_info.flags & DT_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1869 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
1870 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1871 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
1872 fi
1873 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1874 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1875 fi
1876 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1877 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
1878 echo ' && (link_info.flags & DT_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1879 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
1880 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
1881 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
1882 fi
1883 echo ' ; else return' >> e${EMULATION_NAME}.c
1884 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1885 echo '; }' >> e${EMULATION_NAME}.c
1886
1887 else
1888 # Scripts read from the filesystem.
1889
1890 cat >>e${EMULATION_NAME}.c <<EOF
1891 {
1892 *isfile = 1;
1893
1894 if (link_info.relocatable && config.build_constructors)
1895 return "ldscripts/${EMULATION_NAME}.xu";
1896 else if (link_info.relocatable)
1897 return "ldscripts/${EMULATION_NAME}.xr";
1898 else if (!config.text_read_only)
1899 return "ldscripts/${EMULATION_NAME}.xbn";
1900 EOF
1901 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
1902 else
1903 cat >>e${EMULATION_NAME}.c <<EOF
1904 else if (!config.magic_demand_paged)
1905 return "ldscripts/${EMULATION_NAME}.xn";
1906 EOF
1907 fi
1908 if test -n "$GENERATE_PIE_SCRIPT" ; then
1909 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1910 cat >>e${EMULATION_NAME}.c <<EOF
1911 else if (link_info.pie && link_info.combreloc
1912 && link_info.relro && (link_info.flags & DT_BIND_NOW))
1913 return "ldscripts/${EMULATION_NAME}.xdw";
1914 else if (link_info.pie && link_info.combreloc)
1915 return "ldscripts/${EMULATION_NAME}.xdc";
1916 EOF
1917 fi
1918 cat >>e${EMULATION_NAME}.c <<EOF
1919 else if (link_info.pie)
1920 return "ldscripts/${EMULATION_NAME}.xd";
1921 EOF
1922 fi
1923 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1924 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1925 cat >>e${EMULATION_NAME}.c <<EOF
1926 else if (link_info.shared && link_info.combreloc
1927 && link_info.relro && (link_info.flags & DT_BIND_NOW))
1928 return "ldscripts/${EMULATION_NAME}.xsw";
1929 else if (link_info.shared && link_info.combreloc)
1930 return "ldscripts/${EMULATION_NAME}.xsc";
1931 EOF
1932 fi
1933 cat >>e${EMULATION_NAME}.c <<EOF
1934 else if (link_info.shared)
1935 return "ldscripts/${EMULATION_NAME}.xs";
1936 EOF
1937 fi
1938 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1939 cat >>e${EMULATION_NAME}.c <<EOF
1940 else if (link_info.combreloc && link_info.relro
1941 && (link_info.flags & DT_BIND_NOW))
1942 return "ldscripts/${EMULATION_NAME}.xw";
1943 else if (link_info.combreloc)
1944 return "ldscripts/${EMULATION_NAME}.xc";
1945 EOF
1946 fi
1947 cat >>e${EMULATION_NAME}.c <<EOF
1948 else
1949 return "ldscripts/${EMULATION_NAME}.x";
1950 }
1951
1952 EOF
1953 fi
1954 fi
1955
1956 if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1957
1958 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
1959 cat >>e${EMULATION_NAME}.c <<EOF
1960 $PARSE_AND_LIST_PROLOGUE
1961 EOF
1962 fi
1963
1964 cat >>e${EMULATION_NAME}.c <<EOF
1965
1966 #define OPTION_DISABLE_NEW_DTAGS (400)
1967 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
1968 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
1969 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
1970 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
1971 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
1972 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
1973
1974 static void
1975 gld${EMULATION_NAME}_add_options
1976 (int ns, char **shortopts, int nl, struct option **longopts,
1977 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
1978 {
1979 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
1980 static const struct option xtra_long[] = {
1981 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
1982 EOF
1983
1984 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1985 cat >>e${EMULATION_NAME}.c <<EOF
1986 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
1987 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
1988 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
1989 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
1990 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
1991 {"Bgroup", no_argument, NULL, OPTION_GROUP},
1992 EOF
1993 fi
1994
1995 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
1996 cat >>e${EMULATION_NAME}.c <<EOF
1997 $PARSE_AND_LIST_LONGOPTS
1998 EOF
1999 fi
2000
2001 cat >>e${EMULATION_NAME}.c <<EOF
2002 {NULL, no_argument, NULL, 0}
2003 };
2004
2005 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2006 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2007 *longopts = (struct option *)
2008 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2009 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2010 }
2011
2012 #define DEFAULT_BUILD_ID_STYLE "sha1"
2013
2014 static bfd_boolean
2015 gld${EMULATION_NAME}_handle_option (int optc)
2016 {
2017 switch (optc)
2018 {
2019 default:
2020 return FALSE;
2021
2022 case OPTION_BUILD_ID:
2023 if (link_info.emit_note_gnu_build_id != NULL)
2024 {
2025 free (link_info.emit_note_gnu_build_id);
2026 link_info.emit_note_gnu_build_id = NULL;
2027 }
2028 if (optarg == NULL)
2029 optarg = DEFAULT_BUILD_ID_STYLE;
2030 if (strcmp (optarg, "none"))
2031 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2032 break;
2033
2034 EOF
2035
2036 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2037 cat >>e${EMULATION_NAME}.c <<EOF
2038 case OPTION_DISABLE_NEW_DTAGS:
2039 link_info.new_dtags = FALSE;
2040 break;
2041
2042 case OPTION_ENABLE_NEW_DTAGS:
2043 link_info.new_dtags = TRUE;
2044 break;
2045
2046 case OPTION_EH_FRAME_HDR:
2047 link_info.eh_frame_hdr = TRUE;
2048 break;
2049
2050 case OPTION_GROUP:
2051 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2052 /* Groups must be self-contained. */
2053 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2054 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2055 break;
2056
2057 case OPTION_EXCLUDE_LIBS:
2058 add_excluded_libs (optarg);
2059 break;
2060
2061 case OPTION_HASH_STYLE:
2062 link_info.emit_hash = FALSE;
2063 link_info.emit_gnu_hash = FALSE;
2064 if (strcmp (optarg, "sysv") == 0)
2065 link_info.emit_hash = TRUE;
2066 else if (strcmp (optarg, "gnu") == 0)
2067 link_info.emit_gnu_hash = TRUE;
2068 else if (strcmp (optarg, "both") == 0)
2069 {
2070 link_info.emit_hash = TRUE;
2071 link_info.emit_gnu_hash = TRUE;
2072 }
2073 else
2074 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2075 break;
2076
2077 case 'z':
2078 if (strcmp (optarg, "initfirst") == 0)
2079 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2080 else if (strcmp (optarg, "interpose") == 0)
2081 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2082 else if (strcmp (optarg, "loadfltr") == 0)
2083 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2084 else if (strcmp (optarg, "nodefaultlib") == 0)
2085 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2086 else if (strcmp (optarg, "nodelete") == 0)
2087 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2088 else if (strcmp (optarg, "nodlopen") == 0)
2089 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2090 else if (strcmp (optarg, "nodump") == 0)
2091 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2092 else if (strcmp (optarg, "now") == 0)
2093 {
2094 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2095 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2096 }
2097 else if (strcmp (optarg, "lazy") == 0)
2098 {
2099 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2100 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2101 }
2102 else if (strcmp (optarg, "origin") == 0)
2103 {
2104 link_info.flags |= (bfd_vma) DF_ORIGIN;
2105 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2106 }
2107 else if (strcmp (optarg, "defs") == 0)
2108 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2109 else if (strcmp (optarg, "muldefs") == 0)
2110 link_info.allow_multiple_definition = TRUE;
2111 else if (strcmp (optarg, "combreloc") == 0)
2112 link_info.combreloc = TRUE;
2113 else if (strcmp (optarg, "nocombreloc") == 0)
2114 link_info.combreloc = FALSE;
2115 else if (strcmp (optarg, "nocopyreloc") == 0)
2116 link_info.nocopyreloc = TRUE;
2117 else if (strcmp (optarg, "execstack") == 0)
2118 {
2119 link_info.execstack = TRUE;
2120 link_info.noexecstack = FALSE;
2121 }
2122 else if (strcmp (optarg, "noexecstack") == 0)
2123 {
2124 link_info.noexecstack = TRUE;
2125 link_info.execstack = FALSE;
2126 }
2127 EOF
2128
2129 if test -n "$COMMONPAGESIZE"; then
2130 cat >>e${EMULATION_NAME}.c <<EOF
2131 else if (strcmp (optarg, "relro") == 0)
2132 link_info.relro = TRUE;
2133 else if (strcmp (optarg, "norelro") == 0)
2134 link_info.relro = FALSE;
2135 EOF
2136 fi
2137
2138 cat >>e${EMULATION_NAME}.c <<EOF
2139 else if (CONST_STRNEQ (optarg, "max-page-size="))
2140 {
2141 char *end;
2142
2143 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2144 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2145 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2146 optarg + 14);
2147 ASSERT (default_target != NULL);
2148 bfd_emul_set_maxpagesize (default_target, config.maxpagesize);
2149 }
2150 else if (CONST_STRNEQ (optarg, "common-page-size="))
2151 {
2152 char *end;
2153 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2154 if (*end
2155 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2156 einfo (_("%P%F: invalid common page size \`%s'\n"),
2157 optarg + 17);
2158 ASSERT (default_target != NULL);
2159 bfd_emul_set_commonpagesize (default_target,
2160 config.commonpagesize);
2161 }
2162 /* What about the other Solaris -z options? FIXME. */
2163 break;
2164 EOF
2165 fi
2166
2167 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2168 cat >>e${EMULATION_NAME}.c <<EOF
2169 $PARSE_AND_LIST_ARGS_CASES
2170 EOF
2171 fi
2172
2173 cat >>e${EMULATION_NAME}.c <<EOF
2174 }
2175
2176 return TRUE;
2177 }
2178
2179 EOF
2180
2181 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2182 cat >>e${EMULATION_NAME}.c <<EOF
2183
2184 static void
2185 gld${EMULATION_NAME}_list_options (FILE * file)
2186 {
2187 fprintf (file, _(" --build-id[=STYLE]\tGenerate build ID note\n"));
2188 EOF
2189
2190 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2191 cat >>e${EMULATION_NAME}.c <<EOF
2192 fprintf (file, _(" -Bgroup\t\tSelects group name lookup rules for DSO\n"));
2193 fprintf (file, _(" --disable-new-dtags\tDisable new dynamic tags\n"));
2194 fprintf (file, _(" --enable-new-dtags\tEnable new dynamic tags\n"));
2195 fprintf (file, _(" --eh-frame-hdr\tCreate .eh_frame_hdr section\n"));
2196 fprintf (file, _(" --hash-style=STYLE\tSet hash style to sysv, gnu or both\n"));
2197 fprintf (file, _(" -z combreloc\t\tMerge dynamic relocs into one section and sort\n"));
2198 fprintf (file, _(" -z defs\t\tReport unresolved symbols in object files.\n"));
2199 fprintf (file, _(" -z execstack\t\tMark executable as requiring executable stack\n"));
2200 fprintf (file, _(" -z initfirst\t\tMark DSO to be initialized first at runtime\n"));
2201 fprintf (file, _(" -z interpose\t\tMark object to interpose all DSOs but executable\n"));
2202 fprintf (file, _(" -z lazy\t\tMark object lazy runtime binding (default)\n"));
2203 fprintf (file, _(" -z loadfltr\t\tMark object requiring immediate process\n"));
2204 fprintf (file, _(" -z muldefs\t\tAllow multiple definitions\n"));
2205 fprintf (file, _(" -z nocombreloc\tDon't merge dynamic relocs into one section\n"));
2206 fprintf (file, _(" -z nocopyreloc\tDon't create copy relocs\n"));
2207 fprintf (file, _(" -z nodefaultlib\tMark object not to use default search paths\n"));
2208 fprintf (file, _(" -z nodelete\t\tMark DSO non-deletable at runtime\n"));
2209 fprintf (file, _(" -z nodlopen\t\tMark DSO not available to dlopen\n"));
2210 fprintf (file, _(" -z nodump\t\tMark DSO not available to dldump\n"));
2211 fprintf (file, _(" -z noexecstack\tMark executable as not requiring executable stack\n"));
2212 EOF
2213
2214 if test -n "$COMMONPAGESIZE"; then
2215 cat >>e${EMULATION_NAME}.c <<EOF
2216 fprintf (file, _(" -z norelro\t\tDon't create RELRO program header\n"));
2217 EOF
2218 fi
2219
2220 cat >>e${EMULATION_NAME}.c <<EOF
2221 fprintf (file, _(" -z now\t\tMark object non-lazy runtime binding\n"));
2222 fprintf (file, _(" -z origin\t\tMark object requiring immediate \$ORIGIN processing\n\t\t\t at runtime\n"));
2223 EOF
2224
2225 if test -n "$COMMONPAGESIZE"; then
2226 cat >>e${EMULATION_NAME}.c <<EOF
2227 fprintf (file, _(" -z relro\t\tCreate RELRO program header\n"));
2228 EOF
2229 fi
2230
2231 cat >>e${EMULATION_NAME}.c <<EOF
2232 fprintf (file, _(" -z max-page-size=SIZE\tSet maximum page size to SIZE\n"));
2233 fprintf (file, _(" -z common-page-size=SIZE\n\t\t\tSet common page size to SIZE\n"));
2234 fprintf (file, _(" -z KEYWORD\t\tIgnored for Solaris compatibility\n"));
2235 EOF
2236 fi
2237
2238 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2239 cat >>e${EMULATION_NAME}.c <<EOF
2240 $PARSE_AND_LIST_OPTIONS
2241 EOF
2242 fi
2243
2244 cat >>e${EMULATION_NAME}.c <<EOF
2245 }
2246 EOF
2247
2248 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2249 cat >>e${EMULATION_NAME}.c <<EOF
2250 $PARSE_AND_LIST_EPILOGUE
2251 EOF
2252 fi
2253 fi
2254 else
2255 cat >>e${EMULATION_NAME}.c <<EOF
2256 #define gld${EMULATION_NAME}_add_options NULL
2257 #define gld${EMULATION_NAME}_handle_option NULL
2258 EOF
2259 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2260 cat >>e${EMULATION_NAME}.c <<EOF
2261 #define gld${EMULATION_NAME}_list_options NULL
2262 EOF
2263 fi
2264 fi
2265
2266 cat >>e${EMULATION_NAME}.c <<EOF
2267
2268 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2269 {
2270 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2271 ${LDEMUL_SYSLIB-syslib_default},
2272 ${LDEMUL_HLL-hll_default},
2273 ${LDEMUL_AFTER_PARSE-after_parse_default},
2274 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2275 ${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
2276 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2277 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2278 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2279 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2280 "${EMULATION_NAME}",
2281 "${OUTPUT_FORMAT}",
2282 ${LDEMUL_FINISH-gld${EMULATION_NAME}_finish},
2283 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2284 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2285 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2286 ${LDEMUL_SET_SYMBOLS-NULL},
2287 ${LDEMUL_PARSE_ARGS-NULL},
2288 gld${EMULATION_NAME}_add_options,
2289 gld${EMULATION_NAME}_handle_option,
2290 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2291 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2292 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2293 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2294 ${LDEMUL_NEW_VERS_PATTERN-NULL}
2295 };
2296 EOF
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