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