1 # This shell script emits a C file. -*- C -*-
2 # It does some substitutions.
4 cat >e${EMULATION_NAME}.c <<EOF
5 /* This file is is generated by a shell script. DO NOT EDIT! */
7 /* emulate the original gld for the given ${EMULATION_NAME}
8 Copyright (C) 1991, 93, 96, 97, 98, 1999 Free Software Foundation, Inc.
9 Written by Steve Chamberlain steve@cygnus.com
11 This file is part of GLD, the Gnu Linker.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 #define TARGET_IS_${EMULATION_NAME}
47 static boolean gld${EMULATION_NAME}_open_dynamic_archive
48 PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
49 static void gld${EMULATION_NAME}_after_open PARAMS ((void));
50 static void gld${EMULATION_NAME}_check_needed
51 PARAMS ((lang_input_statement_type *));
52 static void gld${EMULATION_NAME}_stat_needed
53 PARAMS ((lang_input_statement_type *));
54 static boolean gld${EMULATION_NAME}_search_needed
55 PARAMS ((const char *, const char *, int));
56 static boolean gld${EMULATION_NAME}_try_needed PARAMS ((const char *, int));
57 static void gld${EMULATION_NAME}_vercheck
58 PARAMS ((lang_input_statement_type *));
59 static void gld${EMULATION_NAME}_find_statement_assignment
60 PARAMS ((lang_statement_union_type *));
61 static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
62 static boolean gld${EMULATION_NAME}_place_orphan
63 PARAMS ((lang_input_statement_type *, asection *));
64 static void gld${EMULATION_NAME}_place_section
65 PARAMS ((lang_statement_union_type *));
66 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
67 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
68 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
69 static int gld${EMULATION_NAME}_parse_args PARAMS((int, char **));
70 static void gld${EMULATION_NAME}_list_options PARAMS ((FILE *));
71 static void gld${EMULATION_NAME}_finish PARAMS ((void));
74 static int no_pipeline_knowledge = 0;
75 static char * thumb_entry_symbol = NULL;
77 #define OPTION_THUMB_ENTRY 301
79 static struct option longopts[] =
81 { "no-pipeline-knowledge", no_argument, NULL, 'p'},
82 { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
83 { NULL, no_argument, NULL, 0 }
87 gld${EMULATION_NAME}_list_options (file)
90 fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n"));
91 fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n"));
95 gld${EMULATION_NAME}_parse_args (argc, argv)
101 int prevoptind = optind;
102 int prevopterr = opterr;
104 static int lastoptind = -1;
106 if (lastoptind != optind)
112 optc = getopt_long_only (argc, argv, "-p", longopts, & longind);
124 no_pipeline_knowledge = 1;
127 case OPTION_THUMB_ENTRY:
128 thumb_entry_symbol = optarg;
137 gld${EMULATION_NAME}_before_parse ()
139 #ifndef TARGET_ /* I.e., if not generic. */
140 ldfile_set_output_arch ("`echo ${ARCH}`");
141 #endif /* not TARGET_ */
142 config.dynamic_link = ${DYNAMIC_LINK-true};
143 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`;
146 /* Try to open a dynamic archive. This is where we know that ELF
147 dynamic libraries have an extension of .so. */
150 gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
152 search_dirs_type *search;
153 lang_input_statement_type *entry;
155 const char *filename;
158 if (! entry->is_archive)
161 filename = entry->filename;
163 string = (char *) xmalloc (strlen (search->name)
168 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
170 if (! ldfile_try_open_bfd (string, entry))
176 entry->filename = string;
178 /* We have found a dynamic object to include in the link. The ELF
179 backend linker will create a DT_NEEDED entry in the .dynamic
180 section naming this file. If this file includes a DT_SONAME
181 entry, it will be used. Otherwise, the ELF linker will just use
182 the name of the file. For an archive found by searching, like
183 this one, the DT_NEEDED entry should consist of just the name of
184 the file, without the path information used to find it. Note
185 that we only need to do this if we have a dynamic object; an
186 archive will never be referenced by a DT_NEEDED entry.
188 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
189 very pretty. I haven't been able to think of anything that is
191 if (bfd_check_format (entry->the_bfd, bfd_object)
192 && (entry->the_bfd->flags & DYNAMIC) != 0)
196 ASSERT (entry->is_archive && entry->search_dirs_flag);
197 needed_name = (char *) xmalloc (strlen (filename)
200 sprintf (needed_name, "lib%s%s.so", filename, arch);
201 bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name);
208 if [ "x${host}" = "x${target}" ] ; then
209 case " ${EMULATION_LIBPATH} " in
210 *" ${EMULATION_NAME} "*)
211 cat >>e${EMULATION_NAME}.c <<EOF
213 /* For a native linker, check the file /etc/ld.so.conf for directories
214 in which we may find shared libraries. /etc/ld.so.conf is really
215 only meaningful on Linux, but we check it on other systems anyhow. */
217 static boolean gld${EMULATION_NAME}_check_ld_so_conf
218 PARAMS ((const char *, int));
221 gld${EMULATION_NAME}_check_ld_so_conf (name, force)
225 static boolean initialized;
226 static char *ld_so_conf;
232 f = fopen ("/etc/ld.so.conf", FOPEN_RT);
241 b = (char *) xmalloc (alloc);
243 while ((c = getc (f)) != EOF)
245 if (len + 1 >= alloc)
248 b = (char *) xrealloc (b, alloc);
261 if (len > 0 && b[len - 1] != ':')
269 if (len > 0 && b[len - 1] == ':')
288 if (ld_so_conf == NULL)
291 return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force);
298 cat >>e${EMULATION_NAME}.c <<EOF
300 /* These variables are required to pass information back and forth
301 between after_open and check_needed and stat_needed and vercheck. */
303 static struct bfd_link_needed_list *global_needed;
304 static struct stat global_stat;
305 static boolean global_found;
306 static struct bfd_link_needed_list *global_vercheck_needed;
307 static boolean global_vercheck_failed;
310 gld${EMULATION_NAME}_after_open ()
312 struct bfd_link_needed_list *needed, *l;
314 if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
316 /* The arm backend needs special fields in the output hash structure.
317 These will only be created if the output format is an arm format,
318 hence we do not support linking and changing output formats at the
319 same time. Use a link followed by objcopy to change output formats. */
320 einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
325 LANG_FOR_EACH_INPUT_STATEMENT (is)
327 /* The interworking bfd must be the last one to be processed */
329 bfd_elf32_arm_get_bfd_for_interworking (is->the_bfd, & link_info);
333 /* We only need to worry about this when doing a final link. */
334 if (link_info.relocateable || link_info.shared)
337 /* Get the list of files which appear in DT_NEEDED entries in
338 dynamic objects included in the link (often there will be none).
339 For each such file, we want to track down the corresponding
340 library, and include the symbol table in the link. This is what
341 the runtime dynamic linker will do. Tracking the files down here
342 permits one dynamic object to include another without requiring
343 special action by the person doing the link. Note that the
344 needed list can actually grow while we are stepping through this
346 needed = bfd_elf_get_needed_list (output_bfd, &link_info);
347 for (l = needed; l != NULL; l = l->next)
349 struct bfd_link_needed_list *ll;
352 /* If we've already seen this file, skip it. */
353 for (ll = needed; ll != l; ll = ll->next)
354 if (strcmp (ll->name, l->name) == 0)
359 /* See if this file was included in the link explicitly. */
361 global_found = false;
362 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
366 /* We need to find this file and include the symbol table. We
367 want to search for the file in the same way that the dynamic
368 linker will search. That means that we want to use
369 rpath_link, rpath, then the environment variable
370 LD_LIBRARY_PATH (native only), then the linker script
371 LIB_SEARCH_DIRS. We do not search using the -L arguments.
373 We search twice. The first time, we skip objects which may
374 introduce version mismatches. The second time, we force
375 their use. See gld${EMULATION_NAME}_vercheck comment. */
376 for (force = 0; force < 2; force++)
378 const char *lib_path;
380 search_dirs_type *search;
382 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
385 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
388 if (command_line.rpath_link == NULL
389 && command_line.rpath == NULL)
391 lib_path = (const char *) getenv ("LD_RUN_PATH");
392 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name,
397 if [ "x${host}" = "x${target}" ] ; then
398 case " ${EMULATION_LIBPATH} " in
399 *" ${EMULATION_NAME} "*)
400 cat >>e${EMULATION_NAME}.c <<EOF
401 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
402 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, force))
408 cat >>e${EMULATION_NAME}.c <<EOF
409 len = strlen (l->name);
410 for (search = search_head; search != NULL; search = search->next)
416 filename = (char *) xmalloc (strlen (search->name) + len + 2);
417 sprintf (filename, "%s/%s", search->name, l->name);
418 if (gld${EMULATION_NAME}_try_needed (filename, force))
425 if [ "x${host}" = "x${target}" ] ; then
426 case " ${EMULATION_LIBPATH} " in
427 *" ${EMULATION_NAME} "*)
428 cat >>e${EMULATION_NAME}.c <<EOF
429 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
435 cat >>e${EMULATION_NAME}.c <<EOF
441 einfo ("%P: warning: %s, needed by %B, not found (try using --rpath)\n",
446 /* Search for a needed file in a path. */
449 gld${EMULATION_NAME}_search_needed (path, name, force)
457 if (path == NULL || *path == '\0')
462 char *filename, *sset;
464 s = strchr (path, ':');
466 s = path + strlen (path);
468 filename = (char *) xmalloc (s - path + len + 2);
473 memcpy (filename, path, s - path);
474 filename[s - path] = '/';
475 sset = filename + (s - path) + 1;
479 if (gld${EMULATION_NAME}_try_needed (filename, force))
492 /* This function is called for each possible name for a dynamic object
493 named by a DT_NEEDED entry. The FORCE parameter indicates whether
494 to skip the check for a conflicting version. */
497 gld${EMULATION_NAME}_try_needed (name, force)
503 abfd = bfd_openr (name, bfd_get_target (output_bfd));
506 if (! bfd_check_format (abfd, bfd_object))
508 (void) bfd_close (abfd);
511 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
513 (void) bfd_close (abfd);
517 /* Check whether this object would include any conflicting library
518 versions. If FORCE is set, then we skip this check; we use this
519 the second time around, if we couldn't find any compatible
520 instance of the shared library. */
524 struct bfd_link_needed_list *needed;
526 if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
527 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
531 global_vercheck_needed = needed;
532 global_vercheck_failed = false;
533 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
534 if (global_vercheck_failed)
536 (void) bfd_close (abfd);
537 /* Return false to force the caller to move on to try
538 another file on the search path. */
542 /* But wait! It gets much worse. On Linux, if a shared
543 library does not use libc at all, we are supposed to skip
544 it the first time around in case we encounter a shared
545 library later on with the same name which does use the
546 version of libc that we want. This is much too horrible
547 to use on any system other than Linux. */
552 cat >>e${EMULATION_NAME}.c <<EOF
554 struct bfd_link_needed_list *l;
556 for (l = needed; l != NULL; l = l->next)
557 if (strncmp (l->name, "libc.so", 7) == 0)
561 (void) bfd_close (abfd);
569 cat >>e${EMULATION_NAME}.c <<EOF
573 /* We've found a dynamic object matching the DT_NEEDED entry. */
575 /* We have already checked that there is no other input file of the
576 same name. We must now check again that we are not including the
577 same file twice. We need to do this because on many systems
578 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
579 reference libc.so.1. If we have already included libc.so, we
580 don't want to include libc.so.1 if they are the same file, and we
581 can only check that using stat. */
583 if (bfd_stat (abfd, &global_stat) != 0)
584 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
585 global_found = false;
586 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
589 /* Return true to indicate that we found the file, even though
590 we aren't going to do anything with it. */
594 /* Tell the ELF backend that don't want the output file to have a
595 DT_NEEDED entry for this file. */
596 bfd_elf_set_dt_needed_name (abfd, "");
598 /* Add this file into the symbol table. */
599 if (! bfd_link_add_symbols (abfd, &link_info))
600 einfo ("%F%B: could not read symbols: %E\n", abfd);
605 /* See if an input file matches a DT_NEEDED entry by name. */
608 gld${EMULATION_NAME}_check_needed (s)
609 lang_input_statement_type *s;
614 if (s->filename != NULL
615 && strcmp (s->filename, global_needed->name) == 0)
621 if (s->the_bfd != NULL)
625 soname = bfd_elf_get_dt_soname (s->the_bfd);
627 && strcmp (soname, global_needed->name) == 0)
634 if (s->search_dirs_flag
635 && s->filename != NULL
636 && strchr (global_needed->name, '/') == NULL)
640 f = strrchr (s->filename, '/');
642 && strcmp (f + 1, global_needed->name) == 0)
650 /* See if an input file matches a DT_NEEDED entry by running stat on
654 gld${EMULATION_NAME}_stat_needed (s)
655 lang_input_statement_type *s;
664 if (s->the_bfd == NULL)
667 if (bfd_stat (s->the_bfd, &st) != 0)
669 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
673 if (st.st_dev == global_stat.st_dev
674 && st.st_ino == global_stat.st_ino)
680 /* We issue a warning if it looks like we are including two
681 different versions of the same shared library. For example,
682 there may be a problem if -lc picks up libc.so.6 but some other
683 shared library has a DT_NEEDED entry of libc.so.5. This is a
684 hueristic test, and it will only work if the name looks like
685 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
686 If we really want to issue warnings about mixing version numbers
687 of shared libraries, we need to find a better way. */
689 if (strchr (global_needed->name, '/') != NULL)
691 suffix = strstr (global_needed->name, ".so.");
694 suffix += sizeof ".so." - 1;
696 soname = bfd_elf_get_dt_soname (s->the_bfd);
698 soname = s->filename;
700 f = strrchr (soname, '/');
706 if (strncmp (f, global_needed->name, suffix - global_needed->name) == 0)
707 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
708 global_needed->name, global_needed->by, f);
711 /* On Linux, it's possible to have different versions of the same
712 shared library linked against different versions of libc. The
713 dynamic linker somehow tags which libc version to use in
714 /etc/ld.so.cache, and, based on the libc that it sees in the
715 executable, chooses which version of the shared library to use.
717 We try to do a similar check here by checking whether this shared
718 library needs any other shared libraries which may conflict with
719 libraries we have already included in the link. If it does, we
720 skip it, and try to find another shared library farther on down the
723 This is called via lang_for_each_input_file.
724 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
725 which we ar checking. This sets GLOBAL_VERCHECK_FAILED if we find
726 a conflicting version. */
729 gld${EMULATION_NAME}_vercheck (s)
730 lang_input_statement_type *s;
732 const char *soname, *f;
733 struct bfd_link_needed_list *l;
735 if (global_vercheck_failed)
737 if (s->the_bfd == NULL
738 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
741 soname = bfd_elf_get_dt_soname (s->the_bfd);
743 soname = bfd_get_filename (s->the_bfd);
745 f = strrchr (soname, '/');
751 for (l = global_vercheck_needed; l != NULL; l = l->next)
755 if (strcmp (f, l->name) == 0)
757 /* Probably can't happen, but it's an easy check. */
761 if (strchr (l->name, '/') != NULL)
764 suffix = strstr (l->name, ".so.");
768 suffix += sizeof ".so." - 1;
770 if (strncmp (f, l->name, suffix - l->name) == 0)
772 /* Here we know that S is a dynamic object FOO.SO.VER1, and
773 the object we are considering needs a dynamic object
774 FOO.SO.VER2, and VER1 and VER2 are different. This
775 appears to be a version mismatch, so we tell the caller
776 to try a different version of this library. */
777 global_vercheck_failed = true;
783 /* Place an orphan section. We use this to put random SHF_ALLOC
784 sections in the right segment. */
786 static asection *hold_section;
787 static lang_output_section_statement_type *hold_use;
791 lang_output_section_statement_type *os;
792 lang_statement_union_type **stmt;
794 static struct orphan_save hold_text;
795 static struct orphan_save hold_rodata;
796 static struct orphan_save hold_data;
797 static struct orphan_save hold_bss;
798 static struct orphan_save hold_rel;
799 static struct orphan_save hold_interp;
803 gld${EMULATION_NAME}_place_orphan (file, s)
804 lang_input_statement_type *file;
807 struct orphan_save *place;
808 asection *snew, **pps;
809 lang_statement_list_type *old;
810 lang_statement_list_type add;
812 const char *secname, *ps;
813 const char *outsecname;
814 lang_output_section_statement_type *os;
816 if ((s->flags & SEC_ALLOC) == 0)
819 /* Look through the script to see where to place this section. */
822 lang_for_each_statement (gld${EMULATION_NAME}_place_section);
824 if (hold_use != NULL)
826 /* We have already placed a section with this name. */
827 wild_doit (&hold_use->children, s, hold_use, file);
831 secname = bfd_get_section_name (s->owner, s);
833 /* If this is a final link, then always put .gnu.warning.SYMBOL
834 sections into the .text section to get them out of the way. */
835 if (! link_info.shared
836 && ! link_info.relocateable
837 && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0
838 && hold_text.os != NULL)
840 wild_doit (&hold_text.os->children, s, hold_text.os, file);
844 /* Decide which segment the section should go in based on the
845 section name and section flags. We put loadable .note sections
846 right after the .interp section, so that the PT_NOTE segment is
847 stored right after the program headers where the OS can read it
848 in the first page. */
849 if (s->flags & SEC_EXCLUDE)
851 else if ((s->flags & SEC_LOAD) != 0
852 && strncmp (secname, ".note", 4) == 0
853 && hold_interp.os != NULL)
854 place = &hold_interp;
855 else if ((s->flags & SEC_HAS_CONTENTS) == 0
856 && hold_bss.os != NULL)
858 else if ((s->flags & SEC_READONLY) == 0
859 && hold_data.os != NULL)
861 else if (strncmp (secname, ".rel", 4) == 0
862 && hold_rel.os != NULL)
864 else if ((s->flags & SEC_CODE) == 0
865 && (s->flags & SEC_READONLY) != 0
866 && hold_rodata.os != NULL)
867 place = &hold_rodata;
868 else if ((s->flags & SEC_READONLY) != 0
869 && hold_text.os != NULL)
874 /* Choose a unique name for the section. This will be needed if the
875 same section name appears in the input file with different
876 loadable or allocateable characteristics. */
877 outsecname = secname;
878 if (bfd_get_section_by_name (output_bfd, outsecname) != NULL)
884 len = strlen (outsecname);
885 newname = xmalloc (len + 5);
886 strcpy (newname, outsecname);
890 sprintf (newname + len, "%d", i);
893 while (bfd_get_section_by_name (output_bfd, newname) != NULL);
895 outsecname = newname;
898 /* Create the section in the output file, and put it in the right
899 place. This shuffling is to make the output file look neater. */
900 snew = bfd_make_section (output_bfd, outsecname);
902 einfo ("%P%F: output format %s cannot represent section called %s\n",
903 output_bfd->xvec->name, outsecname);
904 if (place->os->bfd_section != NULL)
906 /* Unlink it first. */
907 for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
911 /* Now tack it on to the end of the "place->os" section list. */
912 for (pps = &place->os->bfd_section; *pps; pps = &(*pps)->next)
917 /* Start building a list of statements for this section. */
920 lang_list_init (stat_ptr);
922 /* If the name of the section is representable in C, then create
923 symbols to mark the start and the end of the section. */
924 for (ps = outsecname; *ps != '\0'; ps++)
925 if (! isalnum ((unsigned char) *ps) && *ps != '_')
927 if (*ps == '\0' && config.build_constructors)
931 symname = (char *) xmalloc (ps - outsecname + sizeof "__start_");
932 sprintf (symname, "__start_%s", outsecname);
933 lang_add_assignment (exp_assop ('=', symname,
935 exp_intop ((bfd_vma) 1
936 << s->alignment_power))));
939 if (! link_info.relocateable)
942 address = exp_intop ((bfd_vma) 0);
944 lang_enter_output_section_statement (outsecname, address, 0,
948 (etree_type *) NULL);
950 os = lang_output_section_statement_lookup (outsecname);
951 wild_doit (&os->children, s, os, file);
953 lang_leave_output_section_statement
954 ((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL,
958 if (*ps == '\0' && config.build_constructors)
962 symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_");
963 sprintf (symname, "__stop_%s", outsecname);
964 lang_add_assignment (exp_assop ('=', symname,
965 exp_nameop (NAME, ".")));
970 /* Put the new statement list right at the head. */
971 *add.tail = place->os->header.next;
972 place->os->header.next = add.head;
976 /* Put it after the last orphan statement we added. */
977 *add.tail = *place->stmt;
978 *place->stmt = add.head;
980 place->stmt = add.tail; /* Save the end of this list. */
988 gld${EMULATION_NAME}_place_section (s)
989 lang_statement_union_type *s;
991 lang_output_section_statement_type *os;
993 if (s->header.type != lang_output_section_statement_enum)
996 os = &s->output_section_statement;
998 if (strcmp (os->name, hold_section->name) == 0
999 && os->bfd_section != NULL
1000 && ((hold_section->flags & (SEC_LOAD | SEC_ALLOC))
1001 == (os->bfd_section->flags & (SEC_LOAD | SEC_ALLOC))))
1004 if (strcmp (os->name, ".text") == 0)
1006 else if (strcmp (os->name, ".rodata") == 0)
1007 hold_rodata.os = os;
1008 else if (strcmp (os->name, ".data") == 0)
1010 else if (strcmp (os->name, ".bss") == 0)
1012 else if (hold_rel.os == NULL
1013 && os->bfd_section != NULL
1014 && (os->bfd_section->flags & SEC_ALLOC) != 0
1015 && strncmp (os->name, ".rel", 4) == 0)
1017 else if (strcmp (os->name, ".interp") == 0)
1018 hold_interp.os = os;
1021 /* Look through an expression for an assignment statement. */
1024 gld${EMULATION_NAME}_find_exp_assignment (exp)
1027 struct bfd_link_hash_entry *h;
1029 switch (exp->type.node_class)
1032 h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
1033 false, false, false);
1037 /* We call record_link_assignment even if the symbol is defined.
1038 This is because if it is defined by a dynamic object, we
1039 actually want to use the value defined by the linker script,
1040 not the value from the dynamic object (because we are setting
1041 symbols like etext). If the symbol is defined by a regular
1042 object, then, as it happens, calling record_link_assignment
1047 if (strcmp (exp->assign.dst, ".") != 0)
1049 if (! (bfd_elf${ELFSIZE}_record_link_assignment
1050 (output_bfd, &link_info, exp->assign.dst,
1051 exp->type.node_class == etree_provide ? true : false)))
1052 einfo ("%P%F: failed to record assignment to %s: %E\n",
1055 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1059 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1060 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1064 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1065 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1066 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1070 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1078 /* This is called by the before_allocation routine via
1079 lang_for_each_statement. It locates any assignment statements, and
1080 tells the ELF backend about them, in case they are assignments to
1081 symbols which are referred to by dynamic objects. */
1084 gld${EMULATION_NAME}_find_statement_assignment (s)
1085 lang_statement_union_type *s;
1087 if (s->header.type == lang_assignment_statement_enum)
1088 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1091 /* This is called after the sections have been attached to output
1092 sections, but before any sizes or addresses have been set. */
1095 gld${EMULATION_NAME}_before_allocation ()
1100 /* If we are going to make any variable assignments, we need to let
1101 the ELF backend know about them in case the variables are
1102 referred to by dynamic objects. */
1103 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1105 /* Let the ELF backend work out the sizes of any sections required
1106 by dynamic linking. */
1107 rpath = command_line.rpath;
1109 rpath = (const char *) getenv ("LD_RUN_PATH");
1110 if (! (bfd_elf${ELFSIZE}_size_dynamic_sections
1111 (output_bfd, command_line.soname, rpath,
1112 command_line.export_dynamic, command_line.filter_shlib,
1113 (const char * const *) command_line.auxiliary_filters,
1114 &link_info, &sinterp, lang_elf_version_info)))
1115 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1117 /* Let the user override the dynamic linker we are using. */
1118 if (command_line.interpreter != NULL
1121 sinterp->contents = (bfd_byte *) command_line.interpreter;
1122 sinterp->_raw_size = strlen (command_line.interpreter) + 1;
1125 /* Look for any sections named .gnu.warning. As a GNU extensions,
1126 we treat such sections as containing warning messages. We print
1127 out the warning message, and then zero out the section size so
1128 that it does not get copied into the output file. */
1131 LANG_FOR_EACH_INPUT_STATEMENT (is)
1138 if (is->just_syms_flag)
1141 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1145 sz = bfd_section_size (is->the_bfd, s);
1146 msg = xmalloc ((size_t) sz + 1);
1147 if (! bfd_get_section_contents (is->the_bfd, s, msg, (file_ptr) 0, sz))
1148 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1151 ret = link_info.callbacks->warning (&link_info, msg,
1152 (const char *) NULL,
1153 is->the_bfd, (asection *) NULL,
1158 /* Clobber the section size, so that we don't waste copying the
1159 warning into the output file. */
1164 /* we should be able to set the size of the interworking stub section */
1166 /* Here we rummage through the found bfds to collect glue information */
1167 /* FIXME: should this be based on a command line option? krk@cygnus.com */
1169 LANG_FOR_EACH_INPUT_STATEMENT (is)
1171 if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, & link_info,
1172 no_pipeline_knowledge))
1174 /* xgettext:c-format */
1175 einfo (_("Errors encountered processing file %s"), is->filename);
1180 /* We have seen it all. Allocate it, and carry on */
1181 bfd_elf32_arm_allocate_interworking_sections (& link_info);
1185 gld${EMULATION_NAME}_finish PARAMS((void))
1187 struct bfd_link_hash_entry * h;
1189 if (thumb_entry_symbol == NULL)
1192 h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, false, false, true);
1194 if (h != (struct bfd_link_hash_entry *) NULL
1195 && (h->type == bfd_link_hash_defined
1196 || h->type == bfd_link_hash_defweak)
1197 && h->u.def.section->output_section != NULL)
1199 static char buffer[32];
1202 /* Special procesing is required for a Thumb entry symbol. The
1203 bottom bit of its address must be set. */
1204 val = (h->u.def.value
1205 + bfd_get_section_vma (output_bfd,
1206 h->u.def.section->output_section)
1207 + h->u.def.section->output_offset);
1211 /* Now convert this value into a string and store it in entry_symbol
1212 where the lang_finish() function will pick it up. */
1216 sprintf_vma (buffer + 2, val);
1218 if (entry_symbol != NULL && entry_from_cmdline)
1219 einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
1220 thumb_entry_symbol, entry_symbol);
1221 entry_symbol = buffer;
1224 einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
1228 gld${EMULATION_NAME}_get_script (isfile)
1232 if test -n "$COMPILE_IN"
1234 # Scripts compiled in.
1236 # sed commands to quote an ld script as a C string.
1237 sc="-f stringify.sed"
1239 cat >>e${EMULATION_NAME}.c <<EOF
1243 if (link_info.relocateable == true && config.build_constructors == true)
1246 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1247 echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
1248 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1249 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1250 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1251 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1252 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1253 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1254 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1255 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1257 echo ' ; else return' >> e${EMULATION_NAME}.c
1258 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1259 echo '; }' >> e${EMULATION_NAME}.c
1262 # Scripts read from the filesystem.
1264 cat >>e${EMULATION_NAME}.c <<EOF
1268 if (link_info.relocateable == true && config.build_constructors == true)
1269 return "ldscripts/${EMULATION_NAME}.xu";
1270 else if (link_info.relocateable == true)
1271 return "ldscripts/${EMULATION_NAME}.xr";
1272 else if (!config.text_read_only)
1273 return "ldscripts/${EMULATION_NAME}.xbn";
1274 else if (!config.magic_demand_paged)
1275 return "ldscripts/${EMULATION_NAME}.xn";
1276 else if (link_info.shared)
1277 return "ldscripts/${EMULATION_NAME}.xs";
1279 return "ldscripts/${EMULATION_NAME}.x";
1285 cat >>e${EMULATION_NAME}.c <<EOF
1287 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1289 gld${EMULATION_NAME}_before_parse,
1292 after_parse_default,
1293 gld${EMULATION_NAME}_after_open,
1294 after_allocation_default,
1295 set_output_arch_default,
1296 ldemul_default_target,
1297 gld${EMULATION_NAME}_before_allocation,
1298 gld${EMULATION_NAME}_get_script,
1299 "${EMULATION_NAME}",
1301 gld${EMULATION_NAME}_finish,
1302 NULL, /* create output section statements */
1303 gld${EMULATION_NAME}_open_dynamic_archive,
1304 gld${EMULATION_NAME}_place_orphan,
1305 NULL, /* set symbols */
1306 gld${EMULATION_NAME}_parse_args,
1307 NULL, /* unrecognized file */
1308 gld${EMULATION_NAME}_list_options,
1309 NULL, /* recognized file */
1310 NULL /* find_potential_libraries */