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}
44 static boolean gld${EMULATION_NAME}_open_dynamic_archive
45 PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
46 static void gld${EMULATION_NAME}_after_open PARAMS ((void));
47 static void gld${EMULATION_NAME}_check_needed
48 PARAMS ((lang_input_statement_type *));
49 static void gld${EMULATION_NAME}_stat_needed
50 PARAMS ((lang_input_statement_type *));
51 static boolean gld${EMULATION_NAME}_search_needed
52 PARAMS ((const char *, const char *, int));
53 static boolean gld${EMULATION_NAME}_try_needed PARAMS ((const char *, int));
54 static void gld${EMULATION_NAME}_vercheck
55 PARAMS ((lang_input_statement_type *));
56 static void gld${EMULATION_NAME}_find_statement_assignment
57 PARAMS ((lang_statement_union_type *));
58 static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
59 static boolean gld${EMULATION_NAME}_place_orphan
60 PARAMS ((lang_input_statement_type *, asection *));
61 static void gld${EMULATION_NAME}_place_section
62 PARAMS ((lang_statement_union_type *));
63 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
64 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
65 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
66 static int gld${EMULATION_NAME}_parse_args PARAMS((int, char **));
67 static void gld${EMULATION_NAME}_list_options PARAMS ((FILE *));
68 static void gld_${EMULATION_NAME}_finish PARAMS ((void));
71 static int no_pipeline_knowledge = 0;
72 static char * thumb_entry_symbol = NULL;
74 #define OPTION_THUMB_ENTRY 301
76 static struct option longopts[] =
78 { "no-pipeline-knowledge", no_argument, NULL, 'p'},
79 { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
80 { NULL, no_argument, NULL, 0 }
84 gld${EMULATION_NAME}_list_options (file)
87 fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n"));
88 fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n"));
92 gld${EMULATION_NAME}_parse_args (argc, argv)
98 int prevoptind = optind;
99 int prevopterr = opterr;
101 static int lastoptind = -1;
103 if (lastoptind != optind)
109 optc = getopt_long_only (argc, argv, "-p", longopts, & longind);
121 no_pipeline_knowledge = 1;
124 case OPTION_THUMB_ENTRY:
125 thumb_entry_symbol = optarg;
134 gld${EMULATION_NAME}_before_parse ()
136 #ifndef TARGET_ /* I.e., if not generic. */
137 ldfile_set_output_arch ("`echo ${ARCH}`");
138 #endif /* not TARGET_ */
139 config.dynamic_link = ${DYNAMIC_LINK-true};
140 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`;
143 /* Try to open a dynamic archive. This is where we know that ELF
144 dynamic libraries have an extension of .so. */
147 gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
149 search_dirs_type *search;
150 lang_input_statement_type *entry;
152 const char *filename;
155 if (! entry->is_archive)
158 filename = entry->filename;
160 string = (char *) xmalloc (strlen (search->name)
165 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
167 if (! ldfile_try_open_bfd (string, entry))
173 entry->filename = string;
175 /* We have found a dynamic object to include in the link. The ELF
176 backend linker will create a DT_NEEDED entry in the .dynamic
177 section naming this file. If this file includes a DT_SONAME
178 entry, it will be used. Otherwise, the ELF linker will just use
179 the name of the file. For an archive found by searching, like
180 this one, the DT_NEEDED entry should consist of just the name of
181 the file, without the path information used to find it. Note
182 that we only need to do this if we have a dynamic object; an
183 archive will never be referenced by a DT_NEEDED entry.
185 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
186 very pretty. I haven't been able to think of anything that is
188 if (bfd_check_format (entry->the_bfd, bfd_object)
189 && (entry->the_bfd->flags & DYNAMIC) != 0)
193 ASSERT (entry->is_archive && entry->search_dirs_flag);
194 needed_name = (char *) xmalloc (strlen (filename)
197 sprintf (needed_name, "lib%s%s.so", filename, arch);
198 bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name);
205 if [ "x${host}" = "x${target}" ] ; then
206 case " ${EMULATION_LIBPATH} " in
207 *" ${EMULATION_NAME} "*)
208 cat >>e${EMULATION_NAME}.c <<EOF
210 /* For a native linker, check the file /etc/ld.so.conf for directories
211 in which we may find shared libraries. /etc/ld.so.conf is really
212 only meaningful on Linux, but we check it on other systems anyhow. */
214 static boolean gld${EMULATION_NAME}_check_ld_so_conf
215 PARAMS ((const char *, int));
218 gld${EMULATION_NAME}_check_ld_so_conf (name, force)
222 static boolean initialized;
223 static char *ld_so_conf;
229 f = fopen ("/etc/ld.so.conf", FOPEN_RT);
238 b = (char *) xmalloc (alloc);
240 while ((c = getc (f)) != EOF)
242 if (len + 1 >= alloc)
245 b = (char *) xrealloc (b, alloc);
258 if (len > 0 && b[len - 1] != ':')
266 if (len > 0 && b[len - 1] == ':')
285 if (ld_so_conf == NULL)
288 return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force);
295 cat >>e${EMULATION_NAME}.c <<EOF
297 /* These variables are required to pass information back and forth
298 between after_open and check_needed and stat_needed and vercheck. */
300 static struct bfd_link_needed_list *global_needed;
301 static struct stat global_stat;
302 static boolean global_found;
303 static struct bfd_link_needed_list *global_vercheck_needed;
304 static boolean global_vercheck_failed;
307 gld${EMULATION_NAME}_after_open ()
309 struct bfd_link_needed_list *needed, *l;
311 LANG_FOR_EACH_INPUT_STATEMENT (is)
313 /* The interworking bfd must be the last one to be processed */
315 bfd_elf32_arm_get_bfd_for_interworking (is->the_bfd, & link_info);
318 /* We only need to worry about this when doing a final link. */
319 if (link_info.relocateable || link_info.shared)
322 /* Get the list of files which appear in DT_NEEDED entries in
323 dynamic objects included in the link (often there will be none).
324 For each such file, we want to track down the corresponding
325 library, and include the symbol table in the link. This is what
326 the runtime dynamic linker will do. Tracking the files down here
327 permits one dynamic object to include another without requiring
328 special action by the person doing the link. Note that the
329 needed list can actually grow while we are stepping through this
331 needed = bfd_elf_get_needed_list (output_bfd, &link_info);
332 for (l = needed; l != NULL; l = l->next)
334 struct bfd_link_needed_list *ll;
337 /* If we've already seen this file, skip it. */
338 for (ll = needed; ll != l; ll = ll->next)
339 if (strcmp (ll->name, l->name) == 0)
344 /* See if this file was included in the link explicitly. */
346 global_found = false;
347 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
351 /* We need to find this file and include the symbol table. We
352 want to search for the file in the same way that the dynamic
353 linker will search. That means that we want to use
354 rpath_link, rpath, then the environment variable
355 LD_LIBRARY_PATH (native only), then the linker script
356 LIB_SEARCH_DIRS. We do not search using the -L arguments.
358 We search twice. The first time, we skip objects which may
359 introduce version mismatches. The second time, we force
360 their use. See gld${EMULATION_NAME}_vercheck comment. */
361 for (force = 0; force < 2; force++)
363 const char *lib_path;
365 search_dirs_type *search;
367 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
370 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
373 if (command_line.rpath_link == NULL
374 && command_line.rpath == NULL)
376 lib_path = (const char *) getenv ("LD_RUN_PATH");
377 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name,
382 if [ "x${host}" = "x${target}" ] ; then
383 case " ${EMULATION_LIBPATH} " in
384 *" ${EMULATION_NAME} "*)
385 cat >>e${EMULATION_NAME}.c <<EOF
386 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
387 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, force))
393 cat >>e${EMULATION_NAME}.c <<EOF
394 len = strlen (l->name);
395 for (search = search_head; search != NULL; search = search->next)
401 filename = (char *) xmalloc (strlen (search->name) + len + 2);
402 sprintf (filename, "%s/%s", search->name, l->name);
403 if (gld${EMULATION_NAME}_try_needed (filename, force))
410 if [ "x${host}" = "x${target}" ] ; then
411 case " ${EMULATION_LIBPATH} " in
412 *" ${EMULATION_NAME} "*)
413 cat >>e${EMULATION_NAME}.c <<EOF
414 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
420 cat >>e${EMULATION_NAME}.c <<EOF
426 einfo ("%P: warning: %s, needed by %B, not found (try using --rpath)\n",
431 /* Search for a needed file in a path. */
434 gld${EMULATION_NAME}_search_needed (path, name, force)
442 if (path == NULL || *path == '\0')
447 char *filename, *sset;
449 s = strchr (path, ':');
451 s = path + strlen (path);
453 filename = (char *) xmalloc (s - path + len + 2);
458 memcpy (filename, path, s - path);
459 filename[s - path] = '/';
460 sset = filename + (s - path) + 1;
464 if (gld${EMULATION_NAME}_try_needed (filename, force))
477 /* This function is called for each possible name for a dynamic object
478 named by a DT_NEEDED entry. The FORCE parameter indicates whether
479 to skip the check for a conflicting version. */
482 gld${EMULATION_NAME}_try_needed (name, force)
488 abfd = bfd_openr (name, bfd_get_target (output_bfd));
491 if (! bfd_check_format (abfd, bfd_object))
493 (void) bfd_close (abfd);
496 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
498 (void) bfd_close (abfd);
502 /* Check whether this object would include any conflicting library
503 versions. If FORCE is set, then we skip this check; we use this
504 the second time around, if we couldn't find any compatible
505 instance of the shared library. */
509 struct bfd_link_needed_list *needed;
511 if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
512 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
516 global_vercheck_needed = needed;
517 global_vercheck_failed = false;
518 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
519 if (global_vercheck_failed)
521 (void) bfd_close (abfd);
522 /* Return false to force the caller to move on to try
523 another file on the search path. */
527 /* But wait! It gets much worse. On Linux, if a shared
528 library does not use libc at all, we are supposed to skip
529 it the first time around in case we encounter a shared
530 library later on with the same name which does use the
531 version of libc that we want. This is much too horrible
532 to use on any system other than Linux. */
537 cat >>e${EMULATION_NAME}.c <<EOF
539 struct bfd_link_needed_list *l;
541 for (l = needed; l != NULL; l = l->next)
542 if (strncmp (l->name, "libc.so", 7) == 0)
546 (void) bfd_close (abfd);
554 cat >>e${EMULATION_NAME}.c <<EOF
558 /* We've found a dynamic object matching the DT_NEEDED entry. */
560 /* We have already checked that there is no other input file of the
561 same name. We must now check again that we are not including the
562 same file twice. We need to do this because on many systems
563 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
564 reference libc.so.1. If we have already included libc.so, we
565 don't want to include libc.so.1 if they are the same file, and we
566 can only check that using stat. */
568 if (bfd_stat (abfd, &global_stat) != 0)
569 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
570 global_found = false;
571 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
574 /* Return true to indicate that we found the file, even though
575 we aren't going to do anything with it. */
579 /* Tell the ELF backend that don't want the output file to have a
580 DT_NEEDED entry for this file. */
581 bfd_elf_set_dt_needed_name (abfd, "");
583 /* Add this file into the symbol table. */
584 if (! bfd_link_add_symbols (abfd, &link_info))
585 einfo ("%F%B: could not read symbols: %E\n", abfd);
590 /* See if an input file matches a DT_NEEDED entry by name. */
593 gld${EMULATION_NAME}_check_needed (s)
594 lang_input_statement_type *s;
599 if (s->filename != NULL
600 && strcmp (s->filename, global_needed->name) == 0)
606 if (s->the_bfd != NULL)
610 soname = bfd_elf_get_dt_soname (s->the_bfd);
612 && strcmp (soname, global_needed->name) == 0)
619 if (s->search_dirs_flag
620 && s->filename != NULL
621 && strchr (global_needed->name, '/') == NULL)
625 f = strrchr (s->filename, '/');
627 && strcmp (f + 1, global_needed->name) == 0)
635 /* See if an input file matches a DT_NEEDED entry by running stat on
639 gld${EMULATION_NAME}_stat_needed (s)
640 lang_input_statement_type *s;
649 if (s->the_bfd == NULL)
652 if (bfd_stat (s->the_bfd, &st) != 0)
654 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
658 if (st.st_dev == global_stat.st_dev
659 && st.st_ino == global_stat.st_ino)
665 /* We issue a warning if it looks like we are including two
666 different versions of the same shared library. For example,
667 there may be a problem if -lc picks up libc.so.6 but some other
668 shared library has a DT_NEEDED entry of libc.so.5. This is a
669 hueristic test, and it will only work if the name looks like
670 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
671 If we really want to issue warnings about mixing version numbers
672 of shared libraries, we need to find a better way. */
674 if (strchr (global_needed->name, '/') != NULL)
676 suffix = strstr (global_needed->name, ".so.");
679 suffix += sizeof ".so." - 1;
681 soname = bfd_elf_get_dt_soname (s->the_bfd);
683 soname = s->filename;
685 f = strrchr (soname, '/');
691 if (strncmp (f, global_needed->name, suffix - global_needed->name) == 0)
692 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
693 global_needed->name, global_needed->by, f);
696 /* On Linux, it's possible to have different versions of the same
697 shared library linked against different versions of libc. The
698 dynamic linker somehow tags which libc version to use in
699 /etc/ld.so.cache, and, based on the libc that it sees in the
700 executable, chooses which version of the shared library to use.
702 We try to do a similar check here by checking whether this shared
703 library needs any other shared libraries which may conflict with
704 libraries we have already included in the link. If it does, we
705 skip it, and try to find another shared library farther on down the
708 This is called via lang_for_each_input_file.
709 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
710 which we ar checking. This sets GLOBAL_VERCHECK_FAILED if we find
711 a conflicting version. */
714 gld${EMULATION_NAME}_vercheck (s)
715 lang_input_statement_type *s;
717 const char *soname, *f;
718 struct bfd_link_needed_list *l;
720 if (global_vercheck_failed)
722 if (s->the_bfd == NULL
723 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
726 soname = bfd_elf_get_dt_soname (s->the_bfd);
728 soname = bfd_get_filename (s->the_bfd);
730 f = strrchr (soname, '/');
736 for (l = global_vercheck_needed; l != NULL; l = l->next)
740 if (strcmp (f, l->name) == 0)
742 /* Probably can't happen, but it's an easy check. */
746 if (strchr (l->name, '/') != NULL)
749 suffix = strstr (l->name, ".so.");
753 suffix += sizeof ".so." - 1;
755 if (strncmp (f, l->name, suffix - l->name) == 0)
757 /* Here we know that S is a dynamic object FOO.SO.VER1, and
758 the object we are considering needs a dynamic object
759 FOO.SO.VER2, and VER1 and VER2 are different. This
760 appears to be a version mismatch, so we tell the caller
761 to try a different version of this library. */
762 global_vercheck_failed = true;
768 /* Place an orphan section. We use this to put random SHF_ALLOC
769 sections in the right segment. */
771 static asection *hold_section;
772 static lang_output_section_statement_type *hold_use;
773 static lang_output_section_statement_type *hold_text;
774 static lang_output_section_statement_type *hold_rodata;
775 static lang_output_section_statement_type *hold_data;
776 static lang_output_section_statement_type *hold_bss;
777 static lang_output_section_statement_type *hold_rel;
778 static lang_output_section_statement_type *hold_interp;
782 gld${EMULATION_NAME}_place_orphan (file, s)
783 lang_input_statement_type *file;
786 lang_output_section_statement_type *place;
787 asection *snew, **pps;
788 lang_statement_list_type *old;
789 lang_statement_list_type add;
791 const char *secname, *ps;
792 const char *outsecname;
793 lang_output_section_statement_type *os;
795 if ((s->flags & SEC_ALLOC) == 0)
798 /* Look through the script to see where to place this section. */
801 lang_for_each_statement (gld${EMULATION_NAME}_place_section);
803 if (hold_use != NULL)
805 /* We have already placed a section with this name. */
806 wild_doit (&hold_use->children, s, hold_use, file);
810 secname = bfd_get_section_name (s->owner, s);
812 /* If this is a final link, then always put .gnu.warning.SYMBOL
813 sections into the .text section to get them out of the way. */
814 if (! link_info.shared
815 && ! link_info.relocateable
816 && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0
817 && hold_text != NULL)
819 wild_doit (&hold_text->children, s, hold_text, file);
823 /* Decide which segment the section should go in based on the
824 section name and section flags. We put loadable .note sections
825 right after the .interp section, so that the PT_NOTE segment is
826 stored right after the program headers where the OS can read it
827 in the first page. */
829 if (s->flags & SEC_EXCLUDE)
831 else if ((s->flags & SEC_LOAD) != 0
832 && strncmp (secname, ".note", 4) == 0
833 && hold_interp != NULL)
835 else if ((s->flags & SEC_HAS_CONTENTS) == 0
838 else if ((s->flags & SEC_READONLY) == 0
839 && hold_data != NULL)
841 else if (strncmp (secname, ".rel", 4) == 0
844 else if ((s->flags & SEC_CODE) == 0
845 && (s->flags & SEC_READONLY) != 0
846 && hold_rodata != NULL)
848 else if ((s->flags & SEC_READONLY) != 0
849 && hold_text != NULL)
854 /* Choose a unique name for the section. This will be needed if the
855 same section name appears in the input file with different
856 loadable or allocateable characteristics. */
857 outsecname = secname;
858 if (bfd_get_section_by_name (output_bfd, outsecname) != NULL)
864 len = strlen (outsecname);
865 newname = xmalloc (len + 5);
866 strcpy (newname, outsecname);
870 sprintf (newname + len, "%d", i);
873 while (bfd_get_section_by_name (output_bfd, newname) != NULL);
875 outsecname = newname;
878 /* Create the section in the output file, and put it in the right
879 place. This shuffling is to make the output file look neater. */
880 snew = bfd_make_section (output_bfd, outsecname);
882 einfo ("%P%F: output format %s cannot represent section called %s\n",
883 output_bfd->xvec->name, outsecname);
884 if (place->bfd_section != NULL)
886 for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
889 snew->next = place->bfd_section->next;
890 place->bfd_section->next = snew;
893 /* Start building a list of statements for this section. */
896 lang_list_init (stat_ptr);
898 /* If the name of the section is representable in C, then create
899 symbols to mark the start and the end of the section. */
900 for (ps = outsecname; *ps != '\0'; ps++)
901 if (! isalnum ((unsigned char) *ps) && *ps != '_')
903 if (*ps == '\0' && config.build_constructors)
907 symname = (char *) xmalloc (ps - outsecname + sizeof "__start_");
908 sprintf (symname, "__start_%s", outsecname);
909 lang_add_assignment (exp_assop ('=', symname,
911 exp_intop ((bfd_vma) 1
912 << s->alignment_power))));
915 if (! link_info.relocateable)
918 address = exp_intop ((bfd_vma) 0);
920 lang_enter_output_section_statement (outsecname, address, 0,
924 (etree_type *) NULL);
926 os = lang_output_section_statement_lookup (outsecname);
927 wild_doit (&os->children, s, os, file);
929 lang_leave_output_section_statement
930 ((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL);
933 if (*ps == '\0' && config.build_constructors)
937 symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_");
938 sprintf (symname, "__stop_%s", outsecname);
939 lang_add_assignment (exp_assop ('=', symname,
940 exp_nameop (NAME, ".")));
943 /* Now stick the new statement list right after PLACE. */
944 *add.tail = place->header.next;
945 place->header.next = add.head;
953 gld${EMULATION_NAME}_place_section (s)
954 lang_statement_union_type *s;
956 lang_output_section_statement_type *os;
958 if (s->header.type != lang_output_section_statement_enum)
961 os = &s->output_section_statement;
963 if (strcmp (os->name, hold_section->name) == 0
964 && os->bfd_section != NULL
965 && ((hold_section->flags & (SEC_LOAD | SEC_ALLOC))
966 == (os->bfd_section->flags & (SEC_LOAD | SEC_ALLOC))))
969 if (strcmp (os->name, ".text") == 0)
971 else if (strcmp (os->name, ".rodata") == 0)
973 else if (strcmp (os->name, ".data") == 0)
975 else if (strcmp (os->name, ".bss") == 0)
977 else if (hold_rel == NULL
978 && os->bfd_section != NULL
979 && (os->bfd_section->flags & SEC_ALLOC) != 0
980 && strncmp (os->name, ".rel", 4) == 0)
982 else if (strcmp (os->name, ".interp") == 0)
986 /* Look through an expression for an assignment statement. */
989 gld${EMULATION_NAME}_find_exp_assignment (exp)
992 struct bfd_link_hash_entry *h;
994 switch (exp->type.node_class)
997 h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
998 false, false, false);
1002 /* We call record_link_assignment even if the symbol is defined.
1003 This is because if it is defined by a dynamic object, we
1004 actually want to use the value defined by the linker script,
1005 not the value from the dynamic object (because we are setting
1006 symbols like etext). If the symbol is defined by a regular
1007 object, then, as it happens, calling record_link_assignment
1012 if (strcmp (exp->assign.dst, ".") != 0)
1014 if (! (bfd_elf${ELFSIZE}_record_link_assignment
1015 (output_bfd, &link_info, exp->assign.dst,
1016 exp->type.node_class == etree_provide ? true : false)))
1017 einfo ("%P%F: failed to record assignment to %s: %E\n",
1020 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1024 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1025 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1029 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1030 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1031 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1035 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1043 /* This is called by the before_allocation routine via
1044 lang_for_each_statement. It locates any assignment statements, and
1045 tells the ELF backend about them, in case they are assignments to
1046 symbols which are referred to by dynamic objects. */
1049 gld${EMULATION_NAME}_find_statement_assignment (s)
1050 lang_statement_union_type *s;
1052 if (s->header.type == lang_assignment_statement_enum)
1053 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1056 /* This is called after the sections have been attached to output
1057 sections, but before any sizes or addresses have been set. */
1060 gld${EMULATION_NAME}_before_allocation ()
1065 /* If we are going to make any variable assignments, we need to let
1066 the ELF backend know about them in case the variables are
1067 referred to by dynamic objects. */
1068 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1070 /* Let the ELF backend work out the sizes of any sections required
1071 by dynamic linking. */
1072 rpath = command_line.rpath;
1074 rpath = (const char *) getenv ("LD_RUN_PATH");
1075 if (! (bfd_elf${ELFSIZE}_size_dynamic_sections
1076 (output_bfd, command_line.soname, rpath,
1077 command_line.export_dynamic, command_line.filter_shlib,
1078 (const char * const *) command_line.auxiliary_filters,
1079 &link_info, &sinterp, lang_elf_version_info)))
1080 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1082 /* Let the user override the dynamic linker we are using. */
1083 if (command_line.interpreter != NULL
1086 sinterp->contents = (bfd_byte *) command_line.interpreter;
1087 sinterp->_raw_size = strlen (command_line.interpreter) + 1;
1090 /* Look for any sections named .gnu.warning. As a GNU extensions,
1091 we treat such sections as containing warning messages. We print
1092 out the warning message, and then zero out the section size so
1093 that it does not get copied into the output file. */
1096 LANG_FOR_EACH_INPUT_STATEMENT (is)
1103 if (is->just_syms_flag)
1106 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1110 sz = bfd_section_size (is->the_bfd, s);
1111 msg = xmalloc ((size_t) sz + 1);
1112 if (! bfd_get_section_contents (is->the_bfd, s, msg, (file_ptr) 0, sz))
1113 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1116 ret = link_info.callbacks->warning (&link_info, msg,
1117 (const char *) NULL,
1118 is->the_bfd, (asection *) NULL,
1123 /* Clobber the section size, so that we don't waste copying the
1124 warning into the output file. */
1129 /* we should be able to set the size of the interworking stub section */
1131 /* Here we rummage through the found bfds to collect glue information */
1132 /* FIXME: should this be based on a command line option? krk@cygnus.com */
1134 LANG_FOR_EACH_INPUT_STATEMENT (is)
1136 if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, & link_info,
1137 no_pipeline_knowledge))
1139 /* xgettext:c-format */
1140 einfo (_("Errors encountered processing file %s"), is->filename);
1145 /* We have seen it all. Allocate it, and carry on */
1146 bfd_elf32_arm_allocate_interworking_sections (& link_info);
1150 gld${EMULATION_NAME}_finish PARAMS((void))
1152 struct bfd_link_hash_entry * h;
1154 if (thumb_entry_symbol == NULL)
1157 h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, false, false, true);
1159 if (h != (struct bfd_link_hash_entry *) NULL
1160 && (h->type == bfd_link_hash_defined
1161 || h->type == bfd_link_hash_defweak)
1162 && h->u.def.section->output_section != NULL)
1164 static char buffer[32];
1167 /* Special procesing is required for a Thumb entry symbol. The
1168 bottom bit of its address must be set. */
1169 val = (h->u.def.value
1170 + bfd_get_section_vma (output_bfd,
1171 h->u.def.section->output_section)
1172 + h->u.def.section->output_offset);
1176 /* Now convert this value into a string and store it in entry_symbol
1177 where the lang_finish() function will pick it up. */
1181 sprintf_vma (buffer + 2, val);
1183 if (entry_symbol != NULL && entry_from_cmdline)
1184 einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
1185 thumb_entry_symbol, entry_symbol);
1186 entry_symbol = buffer;
1189 einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
1193 gld${EMULATION_NAME}_get_script (isfile)
1197 if test -n "$COMPILE_IN"
1199 # Scripts compiled in.
1201 # sed commands to quote an ld script as a C string.
1202 sc="-f ${srcdir}/emultempl/stringify.sed"
1204 cat >>e${EMULATION_NAME}.c <<EOF
1208 if (link_info.relocateable == true && config.build_constructors == true)
1211 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1212 echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
1213 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1214 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1215 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1216 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1217 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1218 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1219 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1220 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1222 echo ' ; else return' >> e${EMULATION_NAME}.c
1223 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1224 echo '; }' >> e${EMULATION_NAME}.c
1227 # Scripts read from the filesystem.
1229 cat >>e${EMULATION_NAME}.c <<EOF
1233 if (link_info.relocateable == true && config.build_constructors == true)
1234 return "ldscripts/${EMULATION_NAME}.xu";
1235 else if (link_info.relocateable == true)
1236 return "ldscripts/${EMULATION_NAME}.xr";
1237 else if (!config.text_read_only)
1238 return "ldscripts/${EMULATION_NAME}.xbn";
1239 else if (!config.magic_demand_paged)
1240 return "ldscripts/${EMULATION_NAME}.xn";
1241 else if (link_info.shared)
1242 return "ldscripts/${EMULATION_NAME}.xs";
1244 return "ldscripts/${EMULATION_NAME}.x";
1250 cat >>e${EMULATION_NAME}.c <<EOF
1252 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1254 gld${EMULATION_NAME}_before_parse,
1257 after_parse_default,
1258 gld${EMULATION_NAME}_after_open,
1259 after_allocation_default,
1260 set_output_arch_default,
1261 ldemul_default_target,
1262 gld${EMULATION_NAME}_before_allocation,
1263 gld${EMULATION_NAME}_get_script,
1264 "${EMULATION_NAME}",
1266 gld${EMULATION_NAME}_finish, /* finish */
1267 NULL, /* create output section statements */
1268 gld${EMULATION_NAME}_open_dynamic_archive,
1269 gld${EMULATION_NAME}_place_orphan,
1270 NULL, /* set_symbols */
1271 gld${EMULATION_NAME}_parse_args,
1272 NULL, /* unrecognised file */
1273 gld${EMULATION_NAME}_list_options,
1274 NULL /* recognized file */