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
5 test -z "${ELFSIZE}" && ELFSIZE=32
6 cat >e${EMULATION_NAME}.c <<EOF
7 /* This file is is generated by a shell script. DO NOT EDIT! */
9 /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
10 Copyright (C) 1991, 93, 94, 95, 96, 97, 98, 1999
11 Free Software Foundation, Inc.
12 Written by Steve Chamberlain <sac@cygnus.com>
13 ELF support by Ian Lance Taylor <ian@cygnus.com>
15 This file is part of GLD, the Gnu Linker.
17 This program is free software; you can redistribute it and/or modify
18 it under the terms of the GNU General Public License as published by
19 the Free Software Foundation; either version 2 of the License, or
20 (at your option) any later version.
22 This program is distributed in the hope that it will be useful,
23 but WITHOUT ANY WARRANTY; without even the implied warranty of
24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 GNU General Public License for more details.
27 You should have received a copy of the GNU General Public License
28 along with this program; if not, write to the Free Software
29 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
31 #define TARGET_IS_${EMULATION_NAME}
49 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
50 static boolean gld${EMULATION_NAME}_open_dynamic_archive
51 PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
52 static void gld${EMULATION_NAME}_after_open PARAMS ((void));
53 static void gld${EMULATION_NAME}_check_needed
54 PARAMS ((lang_input_statement_type *));
55 static void gld${EMULATION_NAME}_stat_needed
56 PARAMS ((lang_input_statement_type *));
57 static boolean gld${EMULATION_NAME}_search_needed
58 PARAMS ((const char *, const char *, int));
59 static boolean gld${EMULATION_NAME}_try_needed PARAMS ((const char *, int));
60 static void gld${EMULATION_NAME}_vercheck
61 PARAMS ((lang_input_statement_type *));
62 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
63 static void gld${EMULATION_NAME}_find_statement_assignment
64 PARAMS ((lang_statement_union_type *));
65 static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
66 static boolean gld${EMULATION_NAME}_place_orphan
67 PARAMS ((lang_input_statement_type *, asection *));
68 static void gld${EMULATION_NAME}_place_section
69 PARAMS ((lang_statement_union_type *));
70 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
73 gld${EMULATION_NAME}_before_parse()
75 ldfile_output_architecture = bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`;
76 config.dynamic_link = ${DYNAMIC_LINK-true};
77 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`;
80 /* Try to open a dynamic archive. This is where we know that ELF
81 dynamic libraries have an extension of .so (or .sl on oddball systems
85 gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
87 search_dirs_type *search;
88 lang_input_statement_type *entry;
93 if (! entry->is_archive)
96 filename = entry->filename;
98 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
99 is defined, but it does not seem worth the headache to optimize
100 away those two bytes of space. */
101 string = (char *) xmalloc (strlen (search->name)
104 #ifdef EXTRA_SHLIB_EXTENSION
105 + strlen (EXTRA_SHLIB_EXTENSION)
109 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
111 #ifdef EXTRA_SHLIB_EXTENSION
112 /* Try the .so extension first. If that fails build a new filename
113 using EXTRA_SHLIB_EXTENSION. */
114 if (! ldfile_try_open_bfd (string, entry))
115 sprintf (string, "%s/lib%s%s%s", search->name,
116 filename, arch, EXTRA_SHLIB_EXTENSION);
119 if (! ldfile_try_open_bfd (string, entry))
125 entry->filename = string;
127 /* We have found a dynamic object to include in the link. The ELF
128 backend linker will create a DT_NEEDED entry in the .dynamic
129 section naming this file. If this file includes a DT_SONAME
130 entry, it will be used. Otherwise, the ELF linker will just use
131 the name of the file. For an archive found by searching, like
132 this one, the DT_NEEDED entry should consist of just the name of
133 the file, without the path information used to find it. Note
134 that we only need to do this if we have a dynamic object; an
135 archive will never be referenced by a DT_NEEDED entry.
137 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
138 very pretty. I haven't been able to think of anything that is
140 if (bfd_check_format (entry->the_bfd, bfd_object)
141 && (entry->the_bfd->flags & DYNAMIC) != 0)
145 ASSERT (entry->is_archive && entry->search_dirs_flag);
147 /* Rather than duplicating the logic above. Just use the
148 filename we recorded earlier.
150 First strip off everything before the last '/'. */
151 filename = strrchr (entry->filename, '/');
154 needed_name = (char *) xmalloc (strlen (filename) + 1);
155 strcpy (needed_name, filename);
156 bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name);
163 if [ "x${host}" = "x${target}" ] ; then
164 case " ${EMULATION_LIBPATH} " in
165 *" ${EMULATION_NAME} "*)
166 cat >>e${EMULATION_NAME}.c <<EOF
168 /* For a native linker, check the file /etc/ld.so.conf for directories
169 in which we may find shared libraries. /etc/ld.so.conf is really
170 only meaningful on Linux, but we check it on other systems anyhow. */
172 static boolean gld${EMULATION_NAME}_check_ld_so_conf
173 PARAMS ((const char *, int));
176 gld${EMULATION_NAME}_check_ld_so_conf (name, force)
180 static boolean initialized;
181 static char *ld_so_conf;
187 f = fopen ("/etc/ld.so.conf", FOPEN_RT);
196 b = (char *) xmalloc (alloc);
198 while ((c = getc (f)) != EOF)
200 if (len + 1 >= alloc)
203 b = (char *) xrealloc (b, alloc);
216 if (len > 0 && b[len - 1] != ':')
224 if (len > 0 && b[len - 1] == ':')
243 if (ld_so_conf == NULL)
246 return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force);
253 cat >>e${EMULATION_NAME}.c <<EOF
255 /* These variables are required to pass information back and forth
256 between after_open and check_needed and stat_needed and vercheck. */
258 static struct bfd_link_needed_list *global_needed;
259 static struct stat global_stat;
260 static boolean global_found;
261 static struct bfd_link_needed_list *global_vercheck_needed;
262 static boolean global_vercheck_failed;
264 /* This is called after all the input files have been opened. */
267 gld${EMULATION_NAME}_after_open ()
269 struct bfd_link_needed_list *needed, *l;
271 /* We only need to worry about this when doing a final link. */
272 if (link_info.relocateable || link_info.shared)
275 /* Get the list of files which appear in DT_NEEDED entries in
276 dynamic objects included in the link (often there will be none).
277 For each such file, we want to track down the corresponding
278 library, and include the symbol table in the link. This is what
279 the runtime dynamic linker will do. Tracking the files down here
280 permits one dynamic object to include another without requiring
281 special action by the person doing the link. Note that the
282 needed list can actually grow while we are stepping through this
284 needed = bfd_elf_get_needed_list (output_bfd, &link_info);
285 for (l = needed; l != NULL; l = l->next)
287 struct bfd_link_needed_list *ll;
290 /* If we've already seen this file, skip it. */
291 for (ll = needed; ll != l; ll = ll->next)
292 if (strcmp (ll->name, l->name) == 0)
297 /* See if this file was included in the link explicitly. */
299 global_found = false;
300 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
304 /* We need to find this file and include the symbol table. We
305 want to search for the file in the same way that the dynamic
306 linker will search. That means that we want to use
307 rpath_link, rpath, then the environment variable
308 LD_LIBRARY_PATH (native only), then the linker script
309 LIB_SEARCH_DIRS. We do not search using the -L arguments.
311 We search twice. The first time, we skip objects which may
312 introduce version mismatches. The second time, we force
313 their use. See gld${EMULATION_NAME}_vercheck comment. */
314 for (force = 0; force < 2; force++)
316 const char *lib_path;
318 search_dirs_type *search;
320 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
323 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
326 if (command_line.rpath_link == NULL
327 && command_line.rpath == NULL)
329 lib_path = (const char *) getenv ("LD_RUN_PATH");
330 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name,
335 if [ "x${host}" = "x${target}" ] ; then
336 case " ${EMULATION_LIBPATH} " in
337 *" ${EMULATION_NAME} "*)
338 cat >>e${EMULATION_NAME}.c <<EOF
339 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
340 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, force))
346 cat >>e${EMULATION_NAME}.c <<EOF
347 len = strlen (l->name);
348 for (search = search_head; search != NULL; search = search->next)
354 filename = (char *) xmalloc (strlen (search->name) + len + 2);
355 sprintf (filename, "%s/%s", search->name, l->name);
356 if (gld${EMULATION_NAME}_try_needed (filename, force))
363 if [ "x${host}" = "x${target}" ] ; then
364 case " ${EMULATION_LIBPATH} " in
365 *" ${EMULATION_NAME} "*)
366 cat >>e${EMULATION_NAME}.c <<EOF
367 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
373 cat >>e${EMULATION_NAME}.c <<EOF
379 einfo ("%P: warning: %s, needed by %B, not found (try using --rpath)\n",
384 /* Search for a needed file in a path. */
387 gld${EMULATION_NAME}_search_needed (path, name, force)
395 if (path == NULL || *path == '\0')
400 char *filename, *sset;
402 s = strchr (path, ':');
404 s = path + strlen (path);
406 filename = (char *) xmalloc (s - path + len + 2);
411 memcpy (filename, path, s - path);
412 filename[s - path] = '/';
413 sset = filename + (s - path) + 1;
417 if (gld${EMULATION_NAME}_try_needed (filename, force))
430 /* This function is called for each possible name for a dynamic object
431 named by a DT_NEEDED entry. The FORCE parameter indicates whether
432 to skip the check for a conflicting version. */
435 gld${EMULATION_NAME}_try_needed (name, force)
441 abfd = bfd_openr (name, bfd_get_target (output_bfd));
444 if (! bfd_check_format (abfd, bfd_object))
446 (void) bfd_close (abfd);
449 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
451 (void) bfd_close (abfd);
455 /* Check whether this object would include any conflicting library
456 versions. If FORCE is set, then we skip this check; we use this
457 the second time around, if we couldn't find any compatible
458 instance of the shared library. */
462 struct bfd_link_needed_list *needed;
464 if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
465 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
469 global_vercheck_needed = needed;
470 global_vercheck_failed = false;
471 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
472 if (global_vercheck_failed)
474 (void) bfd_close (abfd);
475 /* Return false to force the caller to move on to try
476 another file on the search path. */
480 /* But wait! It gets much worse. On Linux, if a shared
481 library does not use libc at all, we are supposed to skip
482 it the first time around in case we encounter a shared
483 library later on with the same name which does use the
484 version of libc that we want. This is much too horrible
485 to use on any system other than Linux. */
490 cat >>e${EMULATION_NAME}.c <<EOF
492 struct bfd_link_needed_list *l;
494 for (l = needed; l != NULL; l = l->next)
495 if (strncmp (l->name, "libc.so", 7) == 0)
499 (void) bfd_close (abfd);
507 cat >>e${EMULATION_NAME}.c <<EOF
511 /* We've found a dynamic object matching the DT_NEEDED entry. */
513 /* We have already checked that there is no other input file of the
514 same name. We must now check again that we are not including the
515 same file twice. We need to do this because on many systems
516 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
517 reference libc.so.1. If we have already included libc.so, we
518 don't want to include libc.so.1 if they are the same file, and we
519 can only check that using stat. */
521 if (bfd_stat (abfd, &global_stat) != 0)
522 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
523 global_found = false;
524 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
527 /* Return true to indicate that we found the file, even though
528 we aren't going to do anything with it. */
532 /* Tell the ELF backend that don't want the output file to have a
533 DT_NEEDED entry for this file. */
534 bfd_elf_set_dt_needed_name (abfd, "");
536 /* Add this file into the symbol table. */
537 if (! bfd_link_add_symbols (abfd, &link_info))
538 einfo ("%F%B: could not read symbols: %E\n", abfd);
543 /* See if an input file matches a DT_NEEDED entry by name. */
546 gld${EMULATION_NAME}_check_needed (s)
547 lang_input_statement_type *s;
552 if (s->filename != NULL
553 && strcmp (s->filename, global_needed->name) == 0)
559 if (s->the_bfd != NULL)
563 soname = bfd_elf_get_dt_soname (s->the_bfd);
565 && strcmp (soname, global_needed->name) == 0)
572 if (s->search_dirs_flag
573 && s->filename != NULL
574 && strchr (global_needed->name, '/') == NULL)
578 f = strrchr (s->filename, '/');
580 && strcmp (f + 1, global_needed->name) == 0)
588 /* See if an input file matches a DT_NEEDED entry by running stat on
592 gld${EMULATION_NAME}_stat_needed (s)
593 lang_input_statement_type *s;
602 if (s->the_bfd == NULL)
605 if (bfd_stat (s->the_bfd, &st) != 0)
607 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
611 if (st.st_dev == global_stat.st_dev
612 && st.st_ino == global_stat.st_ino)
618 /* We issue a warning if it looks like we are including two
619 different versions of the same shared library. For example,
620 there may be a problem if -lc picks up libc.so.6 but some other
621 shared library has a DT_NEEDED entry of libc.so.5. This is a
622 hueristic test, and it will only work if the name looks like
623 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
624 If we really want to issue warnings about mixing version numbers
625 of shared libraries, we need to find a better way. */
627 if (strchr (global_needed->name, '/') != NULL)
629 suffix = strstr (global_needed->name, ".so.");
632 suffix += sizeof ".so." - 1;
634 soname = bfd_elf_get_dt_soname (s->the_bfd);
636 soname = s->filename;
638 f = strrchr (soname, '/');
644 if (strncmp (f, global_needed->name, suffix - global_needed->name) == 0)
645 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
646 global_needed->name, global_needed->by, f);
649 /* On Linux, it's possible to have different versions of the same
650 shared library linked against different versions of libc. The
651 dynamic linker somehow tags which libc version to use in
652 /etc/ld.so.cache, and, based on the libc that it sees in the
653 executable, chooses which version of the shared library to use.
655 We try to do a similar check here by checking whether this shared
656 library needs any other shared libraries which may conflict with
657 libraries we have already included in the link. If it does, we
658 skip it, and try to find another shared library farther on down the
661 This is called via lang_for_each_input_file.
662 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
663 which we ar checking. This sets GLOBAL_VERCHECK_FAILED if we find
664 a conflicting version. */
667 gld${EMULATION_NAME}_vercheck (s)
668 lang_input_statement_type *s;
670 const char *soname, *f;
671 struct bfd_link_needed_list *l;
673 if (global_vercheck_failed)
675 if (s->the_bfd == NULL
676 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
679 soname = bfd_elf_get_dt_soname (s->the_bfd);
681 soname = bfd_get_filename (s->the_bfd);
683 f = strrchr (soname, '/');
689 for (l = global_vercheck_needed; l != NULL; l = l->next)
693 if (strcmp (f, l->name) == 0)
695 /* Probably can't happen, but it's an easy check. */
699 if (strchr (l->name, '/') != NULL)
702 suffix = strstr (l->name, ".so.");
706 suffix += sizeof ".so." - 1;
708 if (strncmp (f, l->name, suffix - l->name) == 0)
710 /* Here we know that S is a dynamic object FOO.SO.VER1, and
711 the object we are considering needs a dynamic object
712 FOO.SO.VER2, and VER1 and VER2 are different. This
713 appears to be a version mismatch, so we tell the caller
714 to try a different version of this library. */
715 global_vercheck_failed = true;
721 /* This is called after the sections have been attached to output
722 sections, but before any sizes or addresses have been set. */
725 gld${EMULATION_NAME}_before_allocation ()
730 /* If we are going to make any variable assignments, we need to let
731 the ELF backend know about them in case the variables are
732 referred to by dynamic objects. */
733 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
735 /* Let the ELF backend work out the sizes of any sections required
736 by dynamic linking. */
737 rpath = command_line.rpath;
739 rpath = (const char *) getenv ("LD_RUN_PATH");
740 if (! (bfd_elf${ELFSIZE}_size_dynamic_sections
741 (output_bfd, command_line.soname, rpath,
742 command_line.export_dynamic, command_line.filter_shlib,
743 (const char * const *) command_line.auxiliary_filters,
744 &link_info, &sinterp, lang_elf_version_info)))
745 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
747 /* Let the user override the dynamic linker we are using. */
748 if (command_line.interpreter != NULL
751 sinterp->contents = (bfd_byte *) command_line.interpreter;
752 sinterp->_raw_size = strlen (command_line.interpreter) + 1;
755 /* Look for any sections named .gnu.warning. As a GNU extensions,
756 we treat such sections as containing warning messages. We print
757 out the warning message, and then zero out the section size so
758 that it does not get copied into the output file. */
761 LANG_FOR_EACH_INPUT_STATEMENT (is)
768 if (is->just_syms_flag)
771 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
775 sz = bfd_section_size (is->the_bfd, s);
776 msg = xmalloc ((size_t) sz + 1);
777 if (! bfd_get_section_contents (is->the_bfd, s, msg, (file_ptr) 0, sz))
778 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
781 ret = link_info.callbacks->warning (&link_info, msg,
783 is->the_bfd, (asection *) NULL,
788 /* Clobber the section size, so that we don't waste copying the
789 warning into the output file. */
795 /* This is called by the before_allocation routine via
796 lang_for_each_statement. It locates any assignment statements, and
797 tells the ELF backend about them, in case they are assignments to
798 symbols which are referred to by dynamic objects. */
801 gld${EMULATION_NAME}_find_statement_assignment (s)
802 lang_statement_union_type *s;
804 if (s->header.type == lang_assignment_statement_enum)
805 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
808 /* Look through an expression for an assignment statement. */
811 gld${EMULATION_NAME}_find_exp_assignment (exp)
814 struct bfd_link_hash_entry *h;
816 switch (exp->type.node_class)
819 h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
820 false, false, false);
824 /* We call record_link_assignment even if the symbol is defined.
825 This is because if it is defined by a dynamic object, we
826 actually want to use the value defined by the linker script,
827 not the value from the dynamic object (because we are setting
828 symbols like etext). If the symbol is defined by a regular
829 object, then, as it happens, calling record_link_assignment
834 if (strcmp (exp->assign.dst, ".") != 0)
836 if (! (bfd_elf${ELFSIZE}_record_link_assignment
837 (output_bfd, &link_info, exp->assign.dst,
838 exp->type.node_class == etree_provide ? true : false)))
839 einfo ("%P%F: failed to record assignment to %s: %E\n",
842 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
846 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
847 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
851 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
852 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
853 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
857 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
865 /* Place an orphan section. We use this to put random SHF_ALLOC
866 sections in the right segment. */
868 static asection *hold_section;
869 static lang_output_section_statement_type *hold_use;
873 lang_output_section_statement_type *os;
875 lang_statement_union_type **stmt;
877 static struct orphan_save hold_text;
878 static struct orphan_save hold_rodata;
879 static struct orphan_save hold_data;
880 static struct orphan_save hold_bss;
881 static struct orphan_save hold_rel;
882 static struct orphan_save hold_interp;
886 gld${EMULATION_NAME}_place_orphan (file, s)
887 lang_input_statement_type *file;
890 struct orphan_save *place;
891 lang_statement_list_type *old;
892 lang_statement_list_type add;
894 const char *secname, *ps;
895 const char *outsecname;
896 lang_output_section_statement_type *os;
898 /* Look through the script to see where to place this section. */
901 lang_for_each_statement (gld${EMULATION_NAME}_place_section);
903 if (hold_use != NULL)
905 /* We have already placed a section with this name. */
906 wild_doit (&hold_use->children, s, hold_use, file);
910 secname = bfd_get_section_name (s->owner, s);
912 /* If this is a final link, then always put .gnu.warning.SYMBOL
913 sections into the .text section to get them out of the way. */
914 if (! link_info.shared
915 && ! link_info.relocateable
916 && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0
917 && hold_text.os != NULL)
919 wild_doit (&hold_text.os->children, s, hold_text.os, file);
923 /* Decide which segment the section should go in based on the
924 section name and section flags. We put loadable .note sections
925 right after the .interp section, so that the PT_NOTE segment is
926 stored right after the program headers where the OS can read it
927 in the first page. */
928 if (s->flags & SEC_EXCLUDE)
930 else if ((s->flags & SEC_ALLOC) == 0)
932 else if ((s->flags & SEC_LOAD) != 0
933 && strncmp (secname, ".note", 4) == 0
934 && hold_interp.os != NULL)
935 place = &hold_interp;
936 else if ((s->flags & SEC_HAS_CONTENTS) == 0
937 && hold_bss.os != NULL)
939 else if ((s->flags & SEC_READONLY) == 0
940 && hold_data.os != NULL)
942 else if (strncmp (secname, ".rel", 4) == 0
943 && hold_rel.os != NULL)
945 else if ((s->flags & SEC_CODE) == 0
946 && (s->flags & SEC_READONLY) != 0
947 && hold_rodata.os != NULL)
948 place = &hold_rodata;
949 else if ((s->flags & SEC_READONLY) != 0
950 && hold_text.os != NULL)
955 /* Choose a unique name for the section. This will be needed if the
956 same section name appears in the input file with different
957 loadable or allocateable characteristics. */
958 outsecname = secname;
959 if (bfd_get_section_by_name (output_bfd, outsecname) != NULL)
965 len = strlen (outsecname);
966 newname = xmalloc (len + 5);
967 strcpy (newname, outsecname);
971 sprintf (newname + len, "%d", i);
974 while (bfd_get_section_by_name (output_bfd, newname) != NULL);
976 outsecname = newname;
981 /* Start building a list of statements for this section. */
984 lang_list_init (stat_ptr);
986 /* If the name of the section is representable in C, then create
987 symbols to mark the start and the end of the section. */
988 for (ps = outsecname; *ps != '\0'; ps++)
989 if (! isalnum ((unsigned char) *ps) && *ps != '_')
991 if (*ps == '\0' && config.build_constructors)
996 symname = (char *) xmalloc (ps - outsecname + sizeof "__start_");
997 sprintf (symname, "__start_%s", outsecname);
998 e_align = exp_unop (ALIGN_K,
999 exp_intop ((bfd_vma) 1 << s->alignment_power));
1000 lang_add_assignment (exp_assop ('=', symname, e_align));
1004 if (link_info.relocateable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)
1005 address = exp_intop ((bfd_vma) 0);
1009 lang_enter_output_section_statement (outsecname, address, 0,
1011 (etree_type *) NULL,
1012 (etree_type *) NULL,
1013 (etree_type *) NULL);
1015 os = lang_output_section_statement_lookup (outsecname);
1016 wild_doit (&os->children, s, os, file);
1020 asection *snew, **pps;
1022 lang_leave_output_section_statement
1023 ((bfd_vma) 0, "*default*",
1024 (struct lang_output_section_phdr_list *) NULL, "*default*");
1027 if (*ps == '\0' && config.build_constructors)
1031 symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_");
1032 sprintf (symname, "__stop_%s", outsecname);
1033 lang_add_assignment (exp_assop ('=', symname,
1034 exp_nameop (NAME, ".")));
1038 snew = os->bfd_section;
1039 if (place->os->bfd_section != NULL || place->section != NULL)
1041 /* Shuffle the section to make the output file look neater. */
1042 if (place->section == NULL)
1045 /* Finding the end of the list is a little tricky. We
1046 make a wild stab at it by comparing section flags. */
1047 flagword first_flags = place->os->bfd_section->flags;
1048 for (pps = &place->os->bfd_section->next;
1049 *pps != NULL && (*pps)->flags == first_flags;
1050 pps = &(*pps)->next)
1052 place->section = pps;
1054 /* Put orphans after the first section on the list. */
1055 place->section = &place->os->bfd_section->next;
1059 /* Unlink the section. */
1060 for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
1064 /* Now tack it on to the "place->os" section list. */
1065 snew->next = *place->section;
1066 *place->section = snew;
1068 place->section = &snew->next; /* Save the end of this list. */
1070 if (place->stmt == NULL)
1072 /* Put the new statement list right at the head. */
1073 *add.tail = place->os->header.next;
1074 place->os->header.next = add.head;
1078 /* Put it after the last orphan statement we added. */
1079 *add.tail = *place->stmt;
1080 *place->stmt = add.head;
1082 place->stmt = add.tail; /* Save the end of this list. */
1089 gld${EMULATION_NAME}_place_section (s)
1090 lang_statement_union_type *s;
1092 lang_output_section_statement_type *os;
1094 if (s->header.type != lang_output_section_statement_enum)
1097 os = &s->output_section_statement;
1099 if (strcmp (os->name, hold_section->name) == 0
1100 && os->bfd_section != NULL
1101 && ((hold_section->flags & (SEC_LOAD | SEC_ALLOC))
1102 == (os->bfd_section->flags & (SEC_LOAD | SEC_ALLOC))))
1105 if (strcmp (os->name, ".text") == 0)
1107 else if (strcmp (os->name, ".rodata") == 0)
1108 hold_rodata.os = os;
1109 else if (strcmp (os->name, ".data") == 0)
1111 else if (strcmp (os->name, ".bss") == 0)
1113 else if (hold_rel.os == NULL
1114 && os->bfd_section != NULL
1115 && (os->bfd_section->flags & SEC_ALLOC) != 0
1116 && strncmp (os->name, ".rel", 4) == 0)
1118 else if (strcmp (os->name, ".interp") == 0)
1119 hold_interp.os = os;
1123 gld${EMULATION_NAME}_get_script(isfile)
1127 if test -n "$COMPILE_IN"
1129 # Scripts compiled in.
1131 # sed commands to quote an ld script as a C string.
1132 sc="-f stringify.sed"
1134 cat >>e${EMULATION_NAME}.c <<EOF
1138 if (link_info.relocateable == true && config.build_constructors == true)
1141 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1142 echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
1143 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1144 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1145 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1146 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1147 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1149 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1150 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1151 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1154 echo ' ; else return' >> e${EMULATION_NAME}.c
1155 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1156 echo '; }' >> e${EMULATION_NAME}.c
1159 # Scripts read from the filesystem.
1161 cat >>e${EMULATION_NAME}.c <<EOF
1165 if (link_info.relocateable == true && config.build_constructors == true)
1166 return "ldscripts/${EMULATION_NAME}.xu";
1167 else if (link_info.relocateable == true)
1168 return "ldscripts/${EMULATION_NAME}.xr";
1169 else if (!config.text_read_only)
1170 return "ldscripts/${EMULATION_NAME}.xbn";
1171 else if (!config.magic_demand_paged)
1172 return "ldscripts/${EMULATION_NAME}.xn";
1173 else if (link_info.shared)
1174 return "ldscripts/${EMULATION_NAME}.xs";
1176 return "ldscripts/${EMULATION_NAME}.x";
1182 if test -n "$PARSE_AND_LIST_ARGS" ; then
1183 cat >>e${EMULATION_NAME}.c <<EOF
1184 static int gld_${EMULATION_NAME}_parse_args PARAMS ((int, char **));
1185 static void gld_${EMULATION_NAME}_list_options PARAMS ((FILE * file));
1187 $PARSE_AND_LIST_ARGS
1191 cat >>e${EMULATION_NAME}.c <<EOF
1192 #define gld_${EMULATION_NAME}_parse_args NULL
1193 #define gld_${EMULATION_NAME}_list_options NULL
1198 cat >>e${EMULATION_NAME}.c <<EOF
1200 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1202 gld${EMULATION_NAME}_before_parse,
1205 after_parse_default,
1206 gld${EMULATION_NAME}_after_open,
1207 after_allocation_default,
1208 set_output_arch_default,
1209 ldemul_default_target,
1210 gld${EMULATION_NAME}_before_allocation,
1211 gld${EMULATION_NAME}_get_script,
1212 "${EMULATION_NAME}",
1215 NULL, /* create output section statements */
1216 gld${EMULATION_NAME}_open_dynamic_archive,
1217 gld${EMULATION_NAME}_place_orphan,
1218 NULL, /* set_symbols */
1219 gld_${EMULATION_NAME}_parse_args,
1220 NULL, /* unrecognized_file */
1221 gld_${EMULATION_NAME}_list_options,
1222 NULL, /* recognized_file */
1223 NULL /* find_potential_libraries */