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 ${EMULATION_NAME}
10 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
11 Free Software Foundation, Inc.
12 Written by Steve Chamberlain <sac@cygnus.com>
13 ELF support by Ian Lance Taylor <ian@cygnus.com>
15 This file is part of GLD, the Gnu Linker.
17 This program is free software; you can redistribute it and/or modify
18 it under the terms of the GNU General Public License as published by
19 the Free Software Foundation; either version 2 of the License, or
20 (at your option) any later version.
22 This program is distributed in the hope that it will be useful,
23 but WITHOUT ANY WARRANTY; without even the implied warranty of
24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 GNU General Public License for more details.
27 You should have received a copy of the GNU General Public License
28 along with this program; if not, write to the Free Software
29 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
31 #define TARGET_IS_${EMULATION_NAME}
35 #include "libiberty.h"
49 #include "elf/common.h"
51 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
52 static void gld${EMULATION_NAME}_vercheck
53 PARAMS ((lang_input_statement_type *));
54 static void gld${EMULATION_NAME}_stat_needed
55 PARAMS ((lang_input_statement_type *));
56 static boolean gld${EMULATION_NAME}_try_needed PARAMS ((const char *, int));
57 static boolean gld${EMULATION_NAME}_search_needed
58 PARAMS ((const char *, const char *, int));
59 static void gld${EMULATION_NAME}_check_needed
60 PARAMS ((lang_input_statement_type *));
61 static void gld${EMULATION_NAME}_after_open PARAMS ((void));
62 static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
63 static void gld${EMULATION_NAME}_find_statement_assignment
64 PARAMS ((lang_statement_union_type *));
65 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
66 static boolean gld${EMULATION_NAME}_open_dynamic_archive
67 PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
68 static lang_output_section_statement_type *output_rel_find PARAMS ((void));
69 static boolean gld${EMULATION_NAME}_place_orphan
70 PARAMS ((lang_input_statement_type *, asection *));
71 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
75 # Import any needed special functions and/or overrides.
77 if test -n "$EXTRA_EM_FILE" ; then
78 . ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
81 # Functions in this file can be overridden by setting the LDEMUL_* shell
82 # variables. If the name of the overriding function is the same as is
83 # defined in this file, then don't output this file's version.
84 # If a different overriding name is given then output the standard function
85 # as presumably it is called from the overriding function.
87 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
88 cat >>e${EMULATION_NAME}.c <<EOF
91 gld${EMULATION_NAME}_before_parse ()
93 ldfile_output_architecture = bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`;
94 config.dynamic_link = ${DYNAMIC_LINK-true};
95 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`;
101 cat >>e${EMULATION_NAME}.c <<EOF
103 /* These variables are required to pass information back and forth
104 between after_open and check_needed and stat_needed and vercheck. */
106 static struct bfd_link_needed_list *global_needed;
107 static struct stat global_stat;
108 static boolean global_found;
109 static struct bfd_link_needed_list *global_vercheck_needed;
110 static boolean global_vercheck_failed;
113 /* On Linux, it's possible to have different versions of the same
114 shared library linked against different versions of libc. The
115 dynamic linker somehow tags which libc version to use in
116 /etc/ld.so.cache, and, based on the libc that it sees in the
117 executable, chooses which version of the shared library to use.
119 We try to do a similar check here by checking whether this shared
120 library needs any other shared libraries which may conflict with
121 libraries we have already included in the link. If it does, we
122 skip it, and try to find another shared library farther on down the
125 This is called via lang_for_each_input_file.
126 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
127 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
128 a conflicting version. */
131 gld${EMULATION_NAME}_vercheck (s)
132 lang_input_statement_type *s;
135 struct bfd_link_needed_list *l;
137 if (global_vercheck_failed)
139 if (s->the_bfd == NULL
140 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
143 soname = bfd_elf_get_dt_soname (s->the_bfd);
145 soname = basename (bfd_get_filename (s->the_bfd));
147 for (l = global_vercheck_needed; l != NULL; l = l->next)
151 if (strcmp (soname, l->name) == 0)
153 /* Probably can't happen, but it's an easy check. */
157 if (strchr (l->name, '/') != NULL)
160 suffix = strstr (l->name, ".so.");
164 suffix += sizeof ".so." - 1;
166 if (strncmp (soname, l->name, suffix - l->name) == 0)
168 /* Here we know that S is a dynamic object FOO.SO.VER1, and
169 the object we are considering needs a dynamic object
170 FOO.SO.VER2, and VER1 and VER2 are different. This
171 appears to be a version mismatch, so we tell the caller
172 to try a different version of this library. */
173 global_vercheck_failed = true;
180 /* See if an input file matches a DT_NEEDED entry by running stat on
184 gld${EMULATION_NAME}_stat_needed (s)
185 lang_input_statement_type *s;
193 if (s->the_bfd == NULL)
196 if (bfd_stat (s->the_bfd, &st) != 0)
198 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
202 if (st.st_dev == global_stat.st_dev
203 && st.st_ino == global_stat.st_ino)
209 /* We issue a warning if it looks like we are including two
210 different versions of the same shared library. For example,
211 there may be a problem if -lc picks up libc.so.6 but some other
212 shared library has a DT_NEEDED entry of libc.so.5. This is a
213 heuristic test, and it will only work if the name looks like
214 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
215 If we really want to issue warnings about mixing version numbers
216 of shared libraries, we need to find a better way. */
218 if (strchr (global_needed->name, '/') != NULL)
220 suffix = strstr (global_needed->name, ".so.");
223 suffix += sizeof ".so." - 1;
225 soname = bfd_elf_get_dt_soname (s->the_bfd);
227 soname = basename (s->filename);
229 if (strncmp (soname, global_needed->name,
230 suffix - global_needed->name) == 0)
231 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
232 global_needed->name, global_needed->by, soname);
236 /* This function is called for each possible name for a dynamic object
237 named by a DT_NEEDED entry. The FORCE parameter indicates whether
238 to skip the check for a conflicting version. */
241 gld${EMULATION_NAME}_try_needed (name, force)
248 abfd = bfd_openr (name, bfd_get_target (output_bfd));
251 if (! bfd_check_format (abfd, bfd_object))
253 (void) bfd_close (abfd);
256 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
258 (void) bfd_close (abfd);
262 /* Check whether this object would include any conflicting library
263 versions. If FORCE is set, then we skip this check; we use this
264 the second time around, if we couldn't find any compatible
265 instance of the shared library. */
269 struct bfd_link_needed_list *needed;
271 if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
272 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
276 global_vercheck_needed = needed;
277 global_vercheck_failed = false;
278 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
279 if (global_vercheck_failed)
281 (void) bfd_close (abfd);
282 /* Return false to force the caller to move on to try
283 another file on the search path. */
287 /* But wait! It gets much worse. On Linux, if a shared
288 library does not use libc at all, we are supposed to skip
289 it the first time around in case we encounter a shared
290 library later on with the same name which does use the
291 version of libc that we want. This is much too horrible
292 to use on any system other than Linux. */
297 cat >>e${EMULATION_NAME}.c <<EOF
299 struct bfd_link_needed_list *l;
301 for (l = needed; l != NULL; l = l->next)
302 if (strncmp (l->name, "libc.so", 7) == 0)
306 (void) bfd_close (abfd);
314 cat >>e${EMULATION_NAME}.c <<EOF
318 /* We've found a dynamic object matching the DT_NEEDED entry. */
320 /* We have already checked that there is no other input file of the
321 same name. We must now check again that we are not including the
322 same file twice. We need to do this because on many systems
323 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
324 reference libc.so.1. If we have already included libc.so, we
325 don't want to include libc.so.1 if they are the same file, and we
326 can only check that using stat. */
328 if (bfd_stat (abfd, &global_stat) != 0)
329 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
331 /* First strip off everything before the last '/'. */
332 soname = basename (abfd->filename);
334 if (trace_file_tries)
335 info_msg (_("found %s at %s\n"), soname, name);
337 global_found = false;
338 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
341 /* Return true to indicate that we found the file, even though
342 we aren't going to do anything with it. */
346 /* Tell the ELF backend that we don't want the output file to have a
347 DT_NEEDED entry for this file. */
348 bfd_elf_set_dt_needed_name (abfd, "");
350 /* Tell the ELF backend that the output file needs a DT_NEEDED
351 entry for this file if it is used to resolve the reference in
353 bfd_elf_set_dt_needed_soname (abfd, soname);
355 /* Add this file into the symbol table. */
356 if (! bfd_link_add_symbols (abfd, &link_info))
357 einfo ("%F%B: could not read symbols: %E\n", abfd);
363 /* Search for a needed file in a path. */
366 gld${EMULATION_NAME}_search_needed (path, name, force)
375 return gld${EMULATION_NAME}_try_needed (name, force);
377 if (path == NULL || *path == '\0')
382 char *filename, *sset;
384 s = strchr (path, ':');
386 s = path + strlen (path);
388 filename = (char *) xmalloc (s - path + len + 2);
393 memcpy (filename, path, s - path);
394 filename[s - path] = '/';
395 sset = filename + (s - path) + 1;
399 if (gld${EMULATION_NAME}_try_needed (filename, force))
413 if [ "x${host}" = "x${target}" ] ; then
414 case " ${EMULATION_LIBPATH} " in
415 *" ${EMULATION_NAME} "*)
418 cat >>e${EMULATION_NAME}.c <<EOF
420 /* For a native linker, check the file /etc/ld.so.conf for directories
421 in which we may find shared libraries. /etc/ld.so.conf is really
422 only meaningful on Linux. */
424 static boolean gld${EMULATION_NAME}_check_ld_so_conf
425 PARAMS ((const char *, int));
428 gld${EMULATION_NAME}_check_ld_so_conf (name, force)
432 static boolean initialized;
433 static char *ld_so_conf;
439 f = fopen ("/etc/ld.so.conf", FOPEN_RT);
448 b = (char *) xmalloc (alloc);
450 while ((c = getc (f)) != EOF)
452 if (len + 1 >= alloc)
455 b = (char *) xrealloc (b, alloc);
468 if (len > 0 && b[len - 1] != ':')
476 if (len > 0 && b[len - 1] == ':')
495 if (ld_so_conf == NULL)
498 return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force);
507 cat >>e${EMULATION_NAME}.c <<EOF
509 /* See if an input file matches a DT_NEEDED entry by name. */
512 gld${EMULATION_NAME}_check_needed (s)
513 lang_input_statement_type *s;
518 if (s->filename != NULL)
522 if (strcmp (s->filename, global_needed->name) == 0)
528 if (s->search_dirs_flag)
530 f = strrchr (s->filename, '/');
532 && strcmp (f + 1, global_needed->name) == 0)
540 if (s->the_bfd != NULL)
544 soname = bfd_elf_get_dt_soname (s->the_bfd);
546 && strcmp (soname, global_needed->name) == 0)
556 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
557 cat >>e${EMULATION_NAME}.c <<EOF
559 /* This is called after all the input files have been opened. */
562 gld${EMULATION_NAME}_after_open ()
564 struct bfd_link_needed_list *needed, *l;
566 /* We only need to worry about this when doing a final link. */
567 if (link_info.relocateable || link_info.shared)
570 /* Get the list of files which appear in DT_NEEDED entries in
571 dynamic objects included in the link (often there will be none).
572 For each such file, we want to track down the corresponding
573 library, and include the symbol table in the link. This is what
574 the runtime dynamic linker will do. Tracking the files down here
575 permits one dynamic object to include another without requiring
576 special action by the person doing the link. Note that the
577 needed list can actually grow while we are stepping through this
579 needed = bfd_elf_get_needed_list (output_bfd, &link_info);
580 for (l = needed; l != NULL; l = l->next)
582 struct bfd_link_needed_list *ll;
585 /* If we've already seen this file, skip it. */
586 for (ll = needed; ll != l; ll = ll->next)
587 if (strcmp (ll->name, l->name) == 0)
592 /* See if this file was included in the link explicitly. */
594 global_found = false;
595 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
599 if (trace_file_tries)
600 info_msg (_("%s needed by %B\n"), l->name, l->by);
602 /* We need to find this file and include the symbol table. We
603 want to search for the file in the same way that the dynamic
604 linker will search. That means that we want to use
605 rpath_link, rpath, then the environment variable
606 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
607 entries (native only), then the linker script LIB_SEARCH_DIRS.
608 We do not search using the -L arguments.
610 We search twice. The first time, we skip objects which may
611 introduce version mismatches. The second time, we force
612 their use. See gld${EMULATION_NAME}_vercheck comment. */
613 for (force = 0; force < 2; force++)
616 search_dirs_type *search;
618 if [ "x${host}" = "x${target}" ] ; then
619 case " ${EMULATION_LIBPATH} " in
620 *" ${EMULATION_NAME} "*)
621 cat >>e${EMULATION_NAME}.c <<EOF
622 const char *lib_path;
623 struct bfd_link_needed_list *rp;
629 cat >>e${EMULATION_NAME}.c <<EOF
631 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
635 if [ "x${host}" = "x${target}" ] ; then
636 case " ${EMULATION_LIBPATH} " in
637 *" ${EMULATION_NAME} "*)
638 cat >>e${EMULATION_NAME}.c <<EOF
639 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
642 if (command_line.rpath_link == NULL
643 && command_line.rpath == NULL)
645 lib_path = (const char *) getenv ("LD_RUN_PATH");
646 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name,
650 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
651 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, force))
655 rp = bfd_elf_get_runpath_list (output_bfd, &link_info);
656 for (; !found && rp != NULL; rp = rp->next)
658 found = (rp->by == l->by
659 && gld${EMULATION_NAME}_search_needed (rp->name,
670 cat >>e${EMULATION_NAME}.c <<EOF
671 len = strlen (l->name);
672 for (search = search_head; search != NULL; search = search->next)
678 filename = (char *) xmalloc (strlen (search->name) + len + 2);
679 sprintf (filename, "%s/%s", search->name, l->name);
680 if (gld${EMULATION_NAME}_try_needed (filename, force))
687 if [ "x${host}" = "x${target}" ] ; then
688 case " ${EMULATION_LIBPATH} " in
689 *" ${EMULATION_NAME} "*)
692 cat >>e${EMULATION_NAME}.c <<EOF
693 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
702 cat >>e${EMULATION_NAME}.c <<EOF
708 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
716 cat >>e${EMULATION_NAME}.c <<EOF
718 /* Look through an expression for an assignment statement. */
721 gld${EMULATION_NAME}_find_exp_assignment (exp)
724 struct bfd_link_hash_entry *h;
726 switch (exp->type.node_class)
729 h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
730 false, false, false);
734 /* We call record_link_assignment even if the symbol is defined.
735 This is because if it is defined by a dynamic object, we
736 actually want to use the value defined by the linker script,
737 not the value from the dynamic object (because we are setting
738 symbols like etext). If the symbol is defined by a regular
739 object, then, as it happens, calling record_link_assignment
744 if (strcmp (exp->assign.dst, ".") != 0)
746 if (! (bfd_elf${ELFSIZE}_record_link_assignment
747 (output_bfd, &link_info, exp->assign.dst,
748 exp->type.node_class == etree_provide ? true : false)))
749 einfo ("%P%F: failed to record assignment to %s: %E\n",
752 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
756 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
757 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
761 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
762 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
763 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
767 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
776 /* This is called by the before_allocation routine via
777 lang_for_each_statement. It locates any assignment statements, and
778 tells the ELF backend about them, in case they are assignments to
779 symbols which are referred to by dynamic objects. */
782 gld${EMULATION_NAME}_find_statement_assignment (s)
783 lang_statement_union_type *s;
785 if (s->header.type == lang_assignment_statement_enum)
786 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
791 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
792 cat >>e${EMULATION_NAME}.c <<EOF
794 /* This is called after the sections have been attached to output
795 sections, but before any sizes or addresses have been set. */
798 gld${EMULATION_NAME}_before_allocation ()
803 /* If we are going to make any variable assignments, we need to let
804 the ELF backend know about them in case the variables are
805 referred to by dynamic objects. */
806 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
808 /* Let the ELF backend work out the sizes of any sections required
809 by dynamic linking. */
810 rpath = command_line.rpath;
812 rpath = (const char *) getenv ("LD_RUN_PATH");
813 if (! (bfd_elf${ELFSIZE}_size_dynamic_sections
814 (output_bfd, command_line.soname, rpath,
815 command_line.export_dynamic, command_line.filter_shlib,
816 (const char * const *) command_line.auxiliary_filters,
817 &link_info, &sinterp, lang_elf_version_info)))
818 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
820 ${ELF_INTERPRETER_NAME+"
823 sinterp->contents = ${ELF_INTERPRETER_NAME};
824 sinterp->_raw_size = strlen (sinterp->contents) + 1;
828 /* Let the user override the dynamic linker we are using. */
829 if (command_line.interpreter != NULL
832 sinterp->contents = (bfd_byte *) command_line.interpreter;
833 sinterp->_raw_size = strlen (command_line.interpreter) + 1;
836 /* Look for any sections named .gnu.warning. As a GNU extensions,
837 we treat such sections as containing warning messages. We print
838 out the warning message, and then zero out the section size so
839 that it does not get copied into the output file. */
842 LANG_FOR_EACH_INPUT_STATEMENT (is)
849 if (is->just_syms_flag)
852 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
856 sz = bfd_section_size (is->the_bfd, s);
857 msg = xmalloc ((size_t) sz + 1);
858 if (! bfd_get_section_contents (is->the_bfd, s, msg, (file_ptr) 0, sz))
859 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
862 ret = link_info.callbacks->warning (&link_info, msg,
864 is->the_bfd, (asection *) NULL,
869 /* Clobber the section size, so that we don't waste copying the
870 warning into the output file. */
879 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
880 cat >>e${EMULATION_NAME}.c <<EOF
882 /* Try to open a dynamic archive. This is where we know that ELF
883 dynamic libraries have an extension of .so (or .sl on oddball systems
887 gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
889 search_dirs_type *search;
890 lang_input_statement_type *entry;
892 const char *filename;
895 if (! entry->is_archive)
898 filename = entry->filename;
900 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
901 is defined, but it does not seem worth the headache to optimize
902 away those two bytes of space. */
903 string = (char *) xmalloc (strlen (search->name)
906 #ifdef EXTRA_SHLIB_EXTENSION
907 + strlen (EXTRA_SHLIB_EXTENSION)
911 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
913 #ifdef EXTRA_SHLIB_EXTENSION
914 /* Try the .so extension first. If that fails build a new filename
915 using EXTRA_SHLIB_EXTENSION. */
916 if (! ldfile_try_open_bfd (string, entry))
917 sprintf (string, "%s/lib%s%s%s", search->name,
918 filename, arch, EXTRA_SHLIB_EXTENSION);
921 if (! ldfile_try_open_bfd (string, entry))
927 entry->filename = string;
929 /* We have found a dynamic object to include in the link. The ELF
930 backend linker will create a DT_NEEDED entry in the .dynamic
931 section naming this file. If this file includes a DT_SONAME
932 entry, it will be used. Otherwise, the ELF linker will just use
933 the name of the file. For an archive found by searching, like
934 this one, the DT_NEEDED entry should consist of just the name of
935 the file, without the path information used to find it. Note
936 that we only need to do this if we have a dynamic object; an
937 archive will never be referenced by a DT_NEEDED entry.
939 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
940 very pretty. I haven't been able to think of anything that is
942 if (bfd_check_format (entry->the_bfd, bfd_object)
943 && (entry->the_bfd->flags & DYNAMIC) != 0)
945 ASSERT (entry->is_archive && entry->search_dirs_flag);
947 /* Rather than duplicating the logic above. Just use the
948 filename we recorded earlier. */
950 filename = xstrdup (basename (entry->filename));
951 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
959 cat >>e${EMULATION_NAME}.c <<EOF
961 /* A variant of lang_output_section_find. Used by place_orphan. */
963 static lang_output_section_statement_type *
966 lang_statement_union_type *u;
967 lang_output_section_statement_type *lookup;
969 for (u = lang_output_section_statement.head;
970 u != (lang_statement_union_type *) NULL;
973 lookup = &u->output_section_statement;
974 if (strncmp (".rel", lookup->name, 4) == 0
975 && lookup->bfd_section != NULL
976 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
981 return (lang_output_section_statement_type *) NULL;
986 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
987 cat >>e${EMULATION_NAME}.c <<EOF
989 /* Place an orphan section. We use this to put random SHF_ALLOC
990 sections in the right segment. */
993 lang_output_section_statement_type *os;
995 lang_statement_union_type **stmt;
999 gld${EMULATION_NAME}_place_orphan (file, s)
1000 lang_input_statement_type *file;
1003 static struct orphan_save hold_text;
1004 static struct orphan_save hold_rodata;
1005 static struct orphan_save hold_data;
1006 static struct orphan_save hold_bss;
1007 static struct orphan_save hold_rel;
1008 static struct orphan_save hold_interp;
1009 static struct orphan_save hold_sdata;
1010 static int count = 1;
1011 struct orphan_save *place;
1012 lang_statement_list_type *old;
1013 lang_statement_list_type add;
1014 etree_type *address;
1015 const char *secname;
1016 const char *outsecname;
1017 const char *ps = NULL;
1018 lang_output_section_statement_type *os;
1020 secname = bfd_get_section_name (s->owner, s);
1022 if (! config.unique_orphan_sections && ! unique_section_p (secname))
1024 /* Look through the script to see where to place this section. */
1025 os = lang_output_section_find (secname);
1028 && os->bfd_section != NULL
1029 && ((s->flags ^ os->bfd_section->flags)
1030 & (SEC_LOAD | SEC_ALLOC)) == 0)
1032 /* We have already placed a section with this name. */
1033 wild_doit (&os->children, s, os, file);
1038 if (hold_text.os == NULL)
1039 hold_text.os = lang_output_section_find (".text");
1041 /* If this is a final link, then always put .gnu.warning.SYMBOL
1042 sections into the .text section to get them out of the way. */
1043 if (! link_info.shared
1044 && ! link_info.relocateable
1045 && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0
1046 && hold_text.os != NULL)
1048 wild_doit (&hold_text.os->children, s, hold_text.os, file);
1052 /* Decide which segment the section should go in based on the
1053 section name and section flags. We put loadable .note sections
1054 right after the .interp section, so that the PT_NOTE segment is
1055 stored right after the program headers where the OS can read it
1056 in the first page. */
1057 #define HAVE_SECTION(hold, name) \
1058 (hold.os != NULL || (hold.os = lang_output_section_find (name)) != NULL)
1060 if (s->flags & SEC_EXCLUDE)
1064 if ((s->flags & SEC_ALLOC) == 0)
1066 else if ((s->flags & SEC_LOAD) != 0
1067 && strncmp (secname, ".note", 5) == 0
1068 && HAVE_SECTION (hold_interp, ".interp"))
1069 place = &hold_interp;
1070 else if ((s->flags & SEC_HAS_CONTENTS) == 0
1071 && HAVE_SECTION (hold_bss, ".bss"))
1073 else if ((s->flags & SEC_SMALL_DATA) != 0
1074 && HAVE_SECTION (hold_sdata, ".sdata"))
1075 place = &hold_sdata;
1076 else if ((s->flags & SEC_READONLY) == 0
1077 && HAVE_SECTION (hold_data, ".data"))
1079 else if (strncmp (secname, ".rel", 4) == 0
1080 && (hold_rel.os != NULL
1081 || (hold_rel.os = output_rel_find ()) != NULL))
1083 else if ((s->flags & (SEC_CODE | SEC_READONLY)) == SEC_READONLY
1084 && HAVE_SECTION (hold_rodata, ".rodata"))
1085 place = &hold_rodata;
1086 else if ((s->flags & (SEC_CODE | SEC_READONLY)) == (SEC_CODE | SEC_READONLY)
1087 && hold_text.os != NULL)
1092 /* Choose a unique name for the section. This will be needed if the
1093 same section name appears in the input file with different
1094 loadable or allocatable characteristics. */
1095 outsecname = secname;
1096 if (bfd_get_section_by_name (output_bfd, outsecname) != NULL)
1098 outsecname = bfd_get_unique_section_name (output_bfd,
1101 if (outsecname == NULL)
1102 einfo ("%F%P: place_orphan failed: %E\n");
1105 /* Start building a list of statements for this section.
1106 First save the current statement pointer. */
1109 /* If we have found an appropriate place for the output section
1110 statements for this orphan, add them to our own private list,
1111 inserting them later into the global statement list. */
1115 lang_list_init (stat_ptr);
1118 if (config.build_constructors)
1120 /* If the name of the section is representable in C, then create
1121 symbols to mark the start and the end of the section. */
1122 for (ps = outsecname; *ps != '\0'; ps++)
1123 if (! isalnum ((unsigned char) *ps) && *ps != '_')
1128 etree_type *e_align;
1130 symname = (char *) xmalloc (ps - outsecname + sizeof "__start_");
1131 sprintf (symname, "__start_%s", outsecname);
1132 e_align = exp_unop (ALIGN_K,
1133 exp_intop ((bfd_vma) 1 << s->alignment_power));
1134 lang_add_assignment (exp_assop ('=', symname, e_align));
1138 if (link_info.relocateable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)
1139 address = exp_intop ((bfd_vma) 0);
1143 os = lang_enter_output_section_statement (outsecname, address, 0,
1145 (etree_type *) NULL,
1146 (etree_type *) NULL,
1147 (etree_type *) NULL);
1149 wild_doit (&os->children, s, os, file);
1151 lang_leave_output_section_statement
1152 ((bfd_vma) 0, "*default*",
1153 (struct lang_output_section_phdr_list *) NULL, "*default*");
1155 if (config.build_constructors && *ps == '\0')
1159 /* lang_leave_ouput_section_statement resets stat_ptr. Put
1160 stat_ptr back where we want it. */
1164 symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_");
1165 sprintf (symname, "__stop_%s", outsecname);
1166 lang_add_assignment (exp_assop ('=', symname,
1167 exp_nameop (NAME, ".")));
1170 /* Restore the global list pointer. */
1175 asection *snew, **pps;
1177 snew = os->bfd_section;
1178 if (place->section != NULL
1179 || (place->os->bfd_section != NULL
1180 && place->os->bfd_section != snew))
1182 /* Shuffle the section to make the output file look neater.
1183 This is really only cosmetic. */
1184 if (place->section == NULL)
1187 /* Finding the end of the list is a little tricky. We
1188 make a wild stab at it by comparing section flags. */
1189 flagword first_flags = place->os->bfd_section->flags;
1190 for (pps = &place->os->bfd_section->next;
1191 *pps != NULL && (*pps)->flags == first_flags;
1192 pps = &(*pps)->next)
1194 place->section = pps;
1196 /* Put orphans after the first section on the list. */
1197 place->section = &place->os->bfd_section->next;
1201 /* Unlink the section. */
1202 for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
1206 /* Now tack it on to the "place->os" section list. */
1207 snew->next = *place->section;
1208 *place->section = snew;
1210 place->section = &snew->next; /* Save the end of this list. */
1212 if (add.head != NULL)
1214 /* We try to put the output statements in some sort of
1215 reasonable order here, because they determine the final
1216 load addresses of the orphan sections. */
1217 if (place->stmt == NULL)
1219 /* Put the new statement list right at the head. */
1220 *add.tail = place->os->header.next;
1221 place->os->header.next = add.head;
1225 /* Put it after the last orphan statement we added. */
1226 *add.tail = *place->stmt;
1227 *place->stmt = add.head;
1230 /* Fix the global list pointer if we happened to tack our
1231 new list at the tail. */
1232 if (*old->tail == add.head)
1233 old->tail = add.tail;
1235 /* Save the end of this list. */
1236 place->stmt = add.tail;
1246 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1247 cat >>e${EMULATION_NAME}.c <<EOF
1250 gld${EMULATION_NAME}_get_script (isfile)
1254 if test -n "$COMPILE_IN"
1256 # Scripts compiled in.
1258 # sed commands to quote an ld script as a C string.
1259 sc="-f stringify.sed"
1261 cat >>e${EMULATION_NAME}.c <<EOF
1265 if (link_info.relocateable == true && config.build_constructors == true)
1268 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1269 echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
1270 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1271 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1272 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1273 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1274 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1276 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1277 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1278 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1281 echo ' ; else return' >> e${EMULATION_NAME}.c
1282 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1283 echo '; }' >> e${EMULATION_NAME}.c
1286 # Scripts read from the filesystem.
1288 cat >>e${EMULATION_NAME}.c <<EOF
1292 if (link_info.relocateable == true && config.build_constructors == true)
1293 return "ldscripts/${EMULATION_NAME}.xu";
1294 else if (link_info.relocateable == true)
1295 return "ldscripts/${EMULATION_NAME}.xr";
1296 else if (!config.text_read_only)
1297 return "ldscripts/${EMULATION_NAME}.xbn";
1298 else if (!config.magic_demand_paged)
1299 return "ldscripts/${EMULATION_NAME}.xn";
1300 else if (link_info.shared)
1301 return "ldscripts/${EMULATION_NAME}.xs";
1303 return "ldscripts/${EMULATION_NAME}.x";
1310 if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1312 if test x"$LDEMUL_PARSE_ARGS" != xgld"$EMULATION_NAME"_parse_args; then
1314 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
1315 cat >>e${EMULATION_NAME}.c <<EOF
1316 $PARSE_AND_LIST_PROLOGUE
1320 cat >>e${EMULATION_NAME}.c <<EOF
1324 #define OPTION_DISABLE_NEW_DTAGS (400)
1325 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
1326 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
1328 static struct option longopts[] =
1332 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1333 cat >>e${EMULATION_NAME}.c <<EOF
1334 /* getopt allows abbreviations, so we do this to stop it from
1335 treating -d/-e as abbreviations for these options. */
1336 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
1337 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
1338 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
1339 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
1340 {"Bgroup", no_argument, NULL, OPTION_GROUP},
1341 {"Bgroup", no_argument, NULL, OPTION_GROUP},
1345 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
1346 cat >>e${EMULATION_NAME}.c <<EOF
1347 $PARSE_AND_LIST_LONGOPTS
1351 cat >>e${EMULATION_NAME}.c <<EOF
1352 {NULL, no_argument, NULL, 0}
1356 static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **));
1359 gld${EMULATION_NAME}_parse_args (argc, argv)
1365 static int prevoptind = -1;
1366 int prevopterr = opterr;
1369 if (prevoptind != optind)
1373 prevoptind = optind;
1375 optc = getopt_long_only (argc, argv,
1376 "-${PARSE_AND_LIST_SHORTOPTS}z:", longopts,
1378 opterr = prevopterr;
1385 optind = prevoptind;
1390 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1391 cat >>e${EMULATION_NAME}.c <<EOF
1392 case OPTION_DISABLE_NEW_DTAGS:
1393 link_info.new_dtags = false;
1396 case OPTION_ENABLE_NEW_DTAGS:
1397 link_info.new_dtags = true;
1401 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
1402 /* Groups must be self-contained. */
1403 link_info.no_undefined = true;
1407 if (strcmp (optarg, "initfirst") == 0)
1408 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
1409 else if (strcmp (optarg, "interpose") == 0)
1410 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
1411 else if (strcmp (optarg, "loadfltr") == 0)
1412 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
1413 else if (strcmp (optarg, "nodefaultlib") == 0)
1414 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
1415 else if (strcmp (optarg, "nodelete") == 0)
1416 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
1417 else if (strcmp (optarg, "nodlopen") == 0)
1418 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
1419 else if (strcmp (optarg, "nodump") == 0)
1420 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
1421 else if (strcmp (optarg, "now") == 0)
1423 link_info.flags |= (bfd_vma) DF_BIND_NOW;
1424 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
1426 else if (strcmp (optarg, "origin") == 0)
1428 link_info.flags |= (bfd_vma) DF_ORIGIN;
1429 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
1431 else if (strcmp (optarg, "defs") == 0)
1432 link_info.no_undefined = true;
1433 /* What about the other Solaris -z options? FIXME. */
1438 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
1439 cat >>e${EMULATION_NAME}.c <<EOF
1440 $PARSE_AND_LIST_ARGS_CASES
1444 cat >>e${EMULATION_NAME}.c <<EOF
1453 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
1454 cat >>e${EMULATION_NAME}.c <<EOF
1456 static void gld${EMULATION_NAME}_list_options PARAMS ((FILE * file));
1459 gld${EMULATION_NAME}_list_options (file)
1464 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1465 cat >>e${EMULATION_NAME}.c <<EOF
1466 fprintf (file, _(" -Bgroup\t\tSelects group name lookup rules for DSO\n"));
1467 fprintf (file, _(" --disable-new-dtags\tDisable new dynamic tags\n"));
1468 fprintf (file, _(" --enable-new-dtags\tEnable new dynamic tags\n"));
1469 fprintf (file, _(" -z defs\t\tDisallows undefined symbols\n"));
1470 fprintf (file, _(" -z initfirst\t\tMark DSO to be initialized first at runtime\n"));
1471 fprintf (file, _(" -z interpose\t\tMark object to interpose all DSOs but executable\n"));
1472 fprintf (file, _(" -z loadfltr\t\tMark object requiring immediate process\n"));
1473 fprintf (file, _(" -z nodefaultlib\tMark object not to use default search paths\n"));
1474 fprintf (file, _(" -z nodelete\t\tMark DSO non-deletable at runtime\n"));
1475 fprintf (file, _(" -z nodlopen\t\tMark DSO not available to dlopen\n"));
1476 fprintf (file, _(" -z nodump\t\tMark DSO not available to dldump\n"));
1477 fprintf (file, _(" -z now\t\tMark object non-lazy runtime binding\n"));
1478 fprintf (file, _(" -z origin\t\tMark object requiring immediate \$ORIGIN processing\n"));
1479 fprintf (file, _("\t\t\t at runtime\n"));
1480 fprintf (file, _(" -z KEYWORD\t\tIgnored for Solaris compatibility\n"));
1484 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
1485 cat >>e${EMULATION_NAME}.c <<EOF
1486 $PARSE_AND_LIST_OPTIONS
1490 cat >>e${EMULATION_NAME}.c <<EOF
1494 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
1495 cat >>e${EMULATION_NAME}.c <<EOF
1496 $PARSE_AND_LIST_EPILOGUE
1501 if test x"$LDEMUL_PARSE_ARGS" != xgld"$EMULATION_NAME"_parse_args; then
1502 cat >>e${EMULATION_NAME}.c <<EOF
1503 #define gld${EMULATION_NAME}_parse_args NULL
1506 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
1507 cat >>e${EMULATION_NAME}.c <<EOF
1508 #define gld${EMULATION_NAME}_list_options NULL
1513 cat >>e${EMULATION_NAME}.c <<EOF
1515 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1517 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
1518 ${LDEMUL_SYSLIB-syslib_default},
1519 ${LDEMUL_HLL-hll_default},
1520 ${LDEMUL_AFTER_PARSE-after_parse_default},
1521 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
1522 ${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
1523 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
1524 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
1525 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
1526 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
1527 "${EMULATION_NAME}",
1529 ${LDEMUL_FINISH-NULL},
1530 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
1531 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
1532 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
1533 ${LDEMUL_SET_SYMBOLS-NULL},
1534 ${LDEMUL_PARSE_ARGS-gld${EMULATION_NAME}_parse_args},
1535 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
1536 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
1537 ${LDEMUL_RECOGNIZED_FILE-NULL},
1538 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},