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 ${EMULATION_NAME}
10 Copyright (C) 1991, 93, 94, 95, 96, 97, 98, 99, 2000
11 Free Software Foundation, Inc.
12 Written by Steve Chamberlain <sac@cygnus.com>
13 ELF support by Ian Lance Taylor <ian@cygnus.com>
15 This file is part of GLD, the Gnu Linker.
17 This program is free software; you can redistribute it and/or modify
18 it under the terms of the GNU General Public License as published by
19 the Free Software Foundation; either version 2 of the License, or
20 (at your option) any later version.
22 This program is distributed in the hope that it will be useful,
23 but WITHOUT ANY WARRANTY; without even the implied warranty of
24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 GNU General Public License for more details.
27 You should have received a copy of the GNU General Public License
28 along with this program; if not, write to the Free Software
29 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
31 #define TARGET_IS_${EMULATION_NAME}
48 #include "elf/common.h"
50 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
51 static void gld${EMULATION_NAME}_vercheck
52 PARAMS ((lang_input_statement_type *));
53 static void gld${EMULATION_NAME}_stat_needed
54 PARAMS ((lang_input_statement_type *));
55 static boolean gld${EMULATION_NAME}_try_needed PARAMS ((const char *, int));
56 static boolean gld${EMULATION_NAME}_search_needed
57 PARAMS ((const char *, const char *, int));
58 static void gld${EMULATION_NAME}_check_needed
59 PARAMS ((lang_input_statement_type *));
60 static void gld${EMULATION_NAME}_after_open PARAMS ((void));
61 static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
62 static void gld${EMULATION_NAME}_find_statement_assignment
63 PARAMS ((lang_statement_union_type *));
64 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
65 static boolean gld${EMULATION_NAME}_open_dynamic_archive
66 PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
67 static lang_output_section_statement_type *output_rel_find PARAMS ((void));
68 static boolean gld${EMULATION_NAME}_place_orphan
69 PARAMS ((lang_input_statement_type *, asection *));
70 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
74 # Import any needed special functions and/or overrides.
76 if test -n "$EXTRA_EM_FILE" ; then
77 . ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
80 # Functions in this file can be overriden by setting the LDEMUL_* shell
81 # variables. If the name of the overriding function is the same as is
82 # defined in this file, then don't output this file's version.
83 # If a different overriding name is given then output the standard function
84 # as presumably it is called from the overriding function.
86 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
87 cat >>e${EMULATION_NAME}.c <<EOF
90 gld${EMULATION_NAME}_before_parse ()
92 ldfile_output_architecture = bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`;
93 config.dynamic_link = ${DYNAMIC_LINK-true};
94 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`;
100 cat >>e${EMULATION_NAME}.c <<EOF
102 /* These variables are required to pass information back and forth
103 between after_open and check_needed and stat_needed and vercheck. */
105 static struct bfd_link_needed_list *global_needed;
106 static struct stat global_stat;
107 static boolean global_found;
108 static struct bfd_link_needed_list *global_vercheck_needed;
109 static boolean global_vercheck_failed;
112 /* On Linux, it's possible to have different versions of the same
113 shared library linked against different versions of libc. The
114 dynamic linker somehow tags which libc version to use in
115 /etc/ld.so.cache, and, based on the libc that it sees in the
116 executable, chooses which version of the shared library to use.
118 We try to do a similar check here by checking whether this shared
119 library needs any other shared libraries which may conflict with
120 libraries we have already included in the link. If it does, we
121 skip it, and try to find another shared library farther on down the
124 This is called via lang_for_each_input_file.
125 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
126 which we ar checking. This sets GLOBAL_VERCHECK_FAILED if we find
127 a conflicting version. */
130 gld${EMULATION_NAME}_vercheck (s)
131 lang_input_statement_type *s;
133 const char *soname, *f;
134 struct bfd_link_needed_list *l;
136 if (global_vercheck_failed)
138 if (s->the_bfd == NULL
139 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
142 soname = bfd_elf_get_dt_soname (s->the_bfd);
144 soname = bfd_get_filename (s->the_bfd);
146 f = strrchr (soname, '/');
152 for (l = global_vercheck_needed; l != NULL; l = l->next)
156 if (strcmp (f, l->name) == 0)
158 /* Probably can't happen, but it's an easy check. */
162 if (strchr (l->name, '/') != NULL)
165 suffix = strstr (l->name, ".so.");
169 suffix += sizeof ".so." - 1;
171 if (strncmp (f, l->name, suffix - l->name) == 0)
173 /* Here we know that S is a dynamic object FOO.SO.VER1, and
174 the object we are considering needs a dynamic object
175 FOO.SO.VER2, and VER1 and VER2 are different. This
176 appears to be a version mismatch, so we tell the caller
177 to try a different version of this library. */
178 global_vercheck_failed = true;
185 /* See if an input file matches a DT_NEEDED entry by running stat on
189 gld${EMULATION_NAME}_stat_needed (s)
190 lang_input_statement_type *s;
199 if (s->the_bfd == NULL)
202 if (bfd_stat (s->the_bfd, &st) != 0)
204 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
208 if (st.st_dev == global_stat.st_dev
209 && st.st_ino == global_stat.st_ino)
215 /* We issue a warning if it looks like we are including two
216 different versions of the same shared library. For example,
217 there may be a problem if -lc picks up libc.so.6 but some other
218 shared library has a DT_NEEDED entry of libc.so.5. This is a
219 hueristic test, and it will only work if the name looks like
220 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
221 If we really want to issue warnings about mixing version numbers
222 of shared libraries, we need to find a better way. */
224 if (strchr (global_needed->name, '/') != NULL)
226 suffix = strstr (global_needed->name, ".so.");
229 suffix += sizeof ".so." - 1;
231 soname = bfd_elf_get_dt_soname (s->the_bfd);
233 soname = s->filename;
235 f = strrchr (soname, '/');
241 if (strncmp (f, global_needed->name, suffix - global_needed->name) == 0)
242 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
243 global_needed->name, global_needed->by, f);
247 /* This function is called for each possible name for a dynamic object
248 named by a DT_NEEDED entry. The FORCE parameter indicates whether
249 to skip the check for a conflicting version. */
252 gld${EMULATION_NAME}_try_needed (name, force)
259 abfd = bfd_openr (name, bfd_get_target (output_bfd));
262 if (! bfd_check_format (abfd, bfd_object))
264 (void) bfd_close (abfd);
267 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
269 (void) bfd_close (abfd);
273 /* Check whether this object would include any conflicting library
274 versions. If FORCE is set, then we skip this check; we use this
275 the second time around, if we couldn't find any compatible
276 instance of the shared library. */
280 struct bfd_link_needed_list *needed;
282 if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
283 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
287 global_vercheck_needed = needed;
288 global_vercheck_failed = false;
289 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
290 if (global_vercheck_failed)
292 (void) bfd_close (abfd);
293 /* Return false to force the caller to move on to try
294 another file on the search path. */
298 /* But wait! It gets much worse. On Linux, if a shared
299 library does not use libc at all, we are supposed to skip
300 it the first time around in case we encounter a shared
301 library later on with the same name which does use the
302 version of libc that we want. This is much too horrible
303 to use on any system other than Linux. */
308 cat >>e${EMULATION_NAME}.c <<EOF
310 struct bfd_link_needed_list *l;
312 for (l = needed; l != NULL; l = l->next)
313 if (strncmp (l->name, "libc.so", 7) == 0)
317 (void) bfd_close (abfd);
325 cat >>e${EMULATION_NAME}.c <<EOF
329 /* We've found a dynamic object matching the DT_NEEDED entry. */
331 /* We have already checked that there is no other input file of the
332 same name. We must now check again that we are not including the
333 same file twice. We need to do this because on many systems
334 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
335 reference libc.so.1. If we have already included libc.so, we
336 don't want to include libc.so.1 if they are the same file, and we
337 can only check that using stat. */
339 if (bfd_stat (abfd, &global_stat) != 0)
340 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
342 /* First strip off everything before the last '/'. */
343 soname = strrchr (abfd->filename, '/');
347 soname = abfd->filename;
349 if (trace_file_tries)
350 info_msg (_("found %s at %s\n"), soname, name);
352 global_found = false;
353 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
356 /* Return true to indicate that we found the file, even though
357 we aren't going to do anything with it. */
361 /* Tell the ELF backend that we don't want the output file to have a
362 DT_NEEDED entry for this file. */
363 bfd_elf_set_dt_needed_name (abfd, "");
365 /* Tell the ELF backend that the output file needs a DT_NEEDED
366 entry for this file if it is used to resolve the reference in
368 bfd_elf_set_dt_needed_soname (abfd, soname);
370 /* Add this file into the symbol table. */
371 if (! bfd_link_add_symbols (abfd, &link_info))
372 einfo ("%F%B: could not read symbols: %E\n", abfd);
378 /* Search for a needed file in a path. */
381 gld${EMULATION_NAME}_search_needed (path, name, force)
389 if (path == NULL || *path == '\0')
394 char *filename, *sset;
396 s = strchr (path, ':');
398 s = path + strlen (path);
400 filename = (char *) xmalloc (s - path + len + 2);
405 memcpy (filename, path, s - path);
406 filename[s - path] = '/';
407 sset = filename + (s - path) + 1;
411 if (gld${EMULATION_NAME}_try_needed (filename, force))
425 if [ "x${host}" = "x${target}" ] ; then
426 case " ${EMULATION_LIBPATH} " in
427 *" ${EMULATION_NAME} "*)
428 cat >>e${EMULATION_NAME}.c <<EOF
430 /* For a native linker, check the file /etc/ld.so.conf for directories
431 in which we may find shared libraries. /etc/ld.so.conf is really
432 only meaningful on Linux, but we check it on other systems anyhow. */
434 static boolean gld${EMULATION_NAME}_check_ld_so_conf
435 PARAMS ((const char *, int));
438 gld${EMULATION_NAME}_check_ld_so_conf (name, force)
442 static boolean initialized;
443 static char *ld_so_conf;
449 f = fopen ("/etc/ld.so.conf", FOPEN_RT);
458 b = (char *) xmalloc (alloc);
460 while ((c = getc (f)) != EOF)
462 if (len + 1 >= alloc)
465 b = (char *) xrealloc (b, alloc);
478 if (len > 0 && b[len - 1] != ':')
486 if (len > 0 && b[len - 1] == ':')
505 if (ld_so_conf == NULL)
508 return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force);
515 cat >>e${EMULATION_NAME}.c <<EOF
517 /* See if an input file matches a DT_NEEDED entry by name. */
520 gld${EMULATION_NAME}_check_needed (s)
521 lang_input_statement_type *s;
526 if (s->filename != NULL
527 && strcmp (s->filename, global_needed->name) == 0)
533 if (s->the_bfd != NULL)
537 soname = bfd_elf_get_dt_soname (s->the_bfd);
539 && strcmp (soname, global_needed->name) == 0)
546 if (s->search_dirs_flag
547 && s->filename != NULL
548 && strchr (global_needed->name, '/') == NULL)
552 f = strrchr (s->filename, '/');
554 && strcmp (f + 1, global_needed->name) == 0)
564 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
565 cat >>e${EMULATION_NAME}.c <<EOF
567 /* This is called after all the input files have been opened. */
570 gld${EMULATION_NAME}_after_open ()
572 struct bfd_link_needed_list *needed, *l;
574 /* We only need to worry about this when doing a final link. */
575 if (link_info.relocateable || link_info.shared)
578 /* Get the list of files which appear in DT_NEEDED entries in
579 dynamic objects included in the link (often there will be none).
580 For each such file, we want to track down the corresponding
581 library, and include the symbol table in the link. This is what
582 the runtime dynamic linker will do. Tracking the files down here
583 permits one dynamic object to include another without requiring
584 special action by the person doing the link. Note that the
585 needed list can actually grow while we are stepping through this
587 needed = bfd_elf_get_needed_list (output_bfd, &link_info);
588 for (l = needed; l != NULL; l = l->next)
590 struct bfd_link_needed_list *ll;
593 /* If we've already seen this file, skip it. */
594 for (ll = needed; ll != l; ll = ll->next)
595 if (strcmp (ll->name, l->name) == 0)
600 /* See if this file was included in the link explicitly. */
602 global_found = false;
603 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
607 if (trace_file_tries)
608 info_msg (_("%s needed by %B\n"), l->name, l->by);
610 /* We need to find this file and include the symbol table. We
611 want to search for the file in the same way that the dynamic
612 linker will search. That means that we want to use
613 rpath_link, rpath, then the environment variable
614 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
615 entries (native only), then the linker script LIB_SEARCH_DIRS.
616 We do not search using the -L arguments.
618 We search twice. The first time, we skip objects which may
619 introduce version mismatches. The second time, we force
620 their use. See gld${EMULATION_NAME}_vercheck comment. */
621 for (force = 0; force < 2; force++)
624 search_dirs_type *search;
626 if [ "x${host}" = "x${target}" ] ; then
627 case " ${EMULATION_LIBPATH} " in
628 *" ${EMULATION_NAME} "*)
629 cat >>e${EMULATION_NAME}.c <<EOF
630 const char *lib_path;
631 struct bfd_link_needed_list *rp;
637 cat >>e${EMULATION_NAME}.c <<EOF
639 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
643 if [ "x${host}" = "x${target}" ] ; then
644 case " ${EMULATION_LIBPATH} " in
645 *" ${EMULATION_NAME} "*)
646 cat >>e${EMULATION_NAME}.c <<EOF
647 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
650 if (command_line.rpath_link == NULL
651 && command_line.rpath == NULL)
653 lib_path = (const char *) getenv ("LD_RUN_PATH");
654 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name,
658 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
659 if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, force))
663 rp = bfd_elf_get_runpath_list (output_bfd, &link_info);
664 for (; !found && rp != NULL; rp = rp->next)
666 found = (rp->by == l->by
667 && gld${EMULATION_NAME}_search_needed (rp->name,
678 cat >>e${EMULATION_NAME}.c <<EOF
679 len = strlen (l->name);
680 for (search = search_head; search != NULL; search = search->next)
686 filename = (char *) xmalloc (strlen (search->name) + len + 2);
687 sprintf (filename, "%s/%s", search->name, l->name);
688 if (gld${EMULATION_NAME}_try_needed (filename, force))
695 if [ "x${host}" = "x${target}" ] ; then
696 case " ${EMULATION_LIBPATH} " in
697 *" ${EMULATION_NAME} "*)
698 cat >>e${EMULATION_NAME}.c <<EOF
699 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
705 cat >>e${EMULATION_NAME}.c <<EOF
711 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
719 cat >>e${EMULATION_NAME}.c <<EOF
721 /* Look through an expression for an assignment statement. */
724 gld${EMULATION_NAME}_find_exp_assignment (exp)
727 struct bfd_link_hash_entry *h;
729 switch (exp->type.node_class)
732 h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
733 false, false, false);
737 /* We call record_link_assignment even if the symbol is defined.
738 This is because if it is defined by a dynamic object, we
739 actually want to use the value defined by the linker script,
740 not the value from the dynamic object (because we are setting
741 symbols like etext). If the symbol is defined by a regular
742 object, then, as it happens, calling record_link_assignment
747 if (strcmp (exp->assign.dst, ".") != 0)
749 if (! (bfd_elf${ELFSIZE}_record_link_assignment
750 (output_bfd, &link_info, exp->assign.dst,
751 exp->type.node_class == etree_provide ? true : false)))
752 einfo ("%P%F: failed to record assignment to %s: %E\n",
755 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
759 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
760 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
764 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
765 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
766 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
770 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
779 /* This is called by the before_allocation routine via
780 lang_for_each_statement. It locates any assignment statements, and
781 tells the ELF backend about them, in case they are assignments to
782 symbols which are referred to by dynamic objects. */
785 gld${EMULATION_NAME}_find_statement_assignment (s)
786 lang_statement_union_type *s;
788 if (s->header.type == lang_assignment_statement_enum)
789 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
794 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
795 cat >>e${EMULATION_NAME}.c <<EOF
797 /* This is called after the sections have been attached to output
798 sections, but before any sizes or addresses have been set. */
801 gld${EMULATION_NAME}_before_allocation ()
806 /* If we are going to make any variable assignments, we need to let
807 the ELF backend know about them in case the variables are
808 referred to by dynamic objects. */
809 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
811 /* Let the ELF backend work out the sizes of any sections required
812 by dynamic linking. */
813 rpath = command_line.rpath;
815 rpath = (const char *) getenv ("LD_RUN_PATH");
816 if (! (bfd_elf${ELFSIZE}_size_dynamic_sections
817 (output_bfd, command_line.soname, rpath,
818 command_line.export_dynamic, command_line.filter_shlib,
819 (const char * const *) command_line.auxiliary_filters,
820 &link_info, &sinterp, lang_elf_version_info)))
821 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
823 /* Let the user override the dynamic linker we are using. */
824 if (command_line.interpreter != NULL
827 sinterp->contents = (bfd_byte *) command_line.interpreter;
828 sinterp->_raw_size = strlen (command_line.interpreter) + 1;
831 /* Look for any sections named .gnu.warning. As a GNU extensions,
832 we treat such sections as containing warning messages. We print
833 out the warning message, and then zero out the section size so
834 that it does not get copied into the output file. */
837 LANG_FOR_EACH_INPUT_STATEMENT (is)
844 if (is->just_syms_flag)
847 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
851 sz = bfd_section_size (is->the_bfd, s);
852 msg = xmalloc ((size_t) sz + 1);
853 if (! bfd_get_section_contents (is->the_bfd, s, msg, (file_ptr) 0, sz))
854 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
857 ret = link_info.callbacks->warning (&link_info, msg,
859 is->the_bfd, (asection *) NULL,
864 /* Clobber the section size, so that we don't waste copying the
865 warning into the output file. */
874 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
875 cat >>e${EMULATION_NAME}.c <<EOF
877 /* Try to open a dynamic archive. This is where we know that ELF
878 dynamic libraries have an extension of .so (or .sl on oddball systems
882 gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
884 search_dirs_type *search;
885 lang_input_statement_type *entry;
887 const char *filename;
890 if (! entry->is_archive)
893 filename = entry->filename;
895 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
896 is defined, but it does not seem worth the headache to optimize
897 away those two bytes of space. */
898 string = (char *) xmalloc (strlen (search->name)
901 #ifdef EXTRA_SHLIB_EXTENSION
902 + strlen (EXTRA_SHLIB_EXTENSION)
906 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
908 #ifdef EXTRA_SHLIB_EXTENSION
909 /* Try the .so extension first. If that fails build a new filename
910 using EXTRA_SHLIB_EXTENSION. */
911 if (! ldfile_try_open_bfd (string, entry))
912 sprintf (string, "%s/lib%s%s%s", search->name,
913 filename, arch, EXTRA_SHLIB_EXTENSION);
916 if (! ldfile_try_open_bfd (string, entry))
922 entry->filename = string;
924 /* We have found a dynamic object to include in the link. The ELF
925 backend linker will create a DT_NEEDED entry in the .dynamic
926 section naming this file. If this file includes a DT_SONAME
927 entry, it will be used. Otherwise, the ELF linker will just use
928 the name of the file. For an archive found by searching, like
929 this one, the DT_NEEDED entry should consist of just the name of
930 the file, without the path information used to find it. Note
931 that we only need to do this if we have a dynamic object; an
932 archive will never be referenced by a DT_NEEDED entry.
934 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
935 very pretty. I haven't been able to think of anything that is
937 if (bfd_check_format (entry->the_bfd, bfd_object)
938 && (entry->the_bfd->flags & DYNAMIC) != 0)
942 ASSERT (entry->is_archive && entry->search_dirs_flag);
944 /* Rather than duplicating the logic above. Just use the
945 filename we recorded earlier.
947 First strip off everything before the last '/'. */
948 filename = strrchr (entry->filename, '/');
951 needed_name = (char *) xmalloc (strlen (filename) + 1);
952 strcpy (needed_name, filename);
953 bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name);
961 cat >>e${EMULATION_NAME}.c <<EOF
963 /* A variant of lang_output_section_find. Used by place_orphan. */
965 static lang_output_section_statement_type *
968 lang_statement_union_type *u;
969 lang_output_section_statement_type *lookup;
971 for (u = lang_output_section_statement.head;
972 u != (lang_statement_union_type *) NULL;
975 lookup = &u->output_section_statement;
976 if (strncmp (".rel", lookup->name, 4) == 0
977 && lookup->bfd_section != NULL
978 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
983 return (lang_output_section_statement_type *) NULL;
988 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
989 cat >>e${EMULATION_NAME}.c <<EOF
991 /* Place an orphan section. We use this to put random SHF_ALLOC
992 sections in the right segment. */
995 lang_output_section_statement_type *os;
997 lang_statement_union_type **stmt;
1001 gld${EMULATION_NAME}_place_orphan (file, s)
1002 lang_input_statement_type *file;
1005 static struct orphan_save hold_text;
1006 static struct orphan_save hold_rodata;
1007 static struct orphan_save hold_data;
1008 static struct orphan_save hold_bss;
1009 static struct orphan_save hold_rel;
1010 static struct orphan_save hold_interp;
1011 static struct orphan_save hold_sdata;
1012 static int count = 1;
1013 struct orphan_save *place;
1014 lang_statement_list_type *old;
1015 lang_statement_list_type add;
1016 etree_type *address;
1017 const char *secname;
1018 const char *outsecname;
1019 const char *ps = NULL;
1020 lang_output_section_statement_type *os;
1022 secname = bfd_get_section_name (s->owner, s);
1024 if (! config.unique_orphan_sections)
1026 /* Look through the script to see where to place this section. */
1027 os = lang_output_section_find (secname);
1030 && os->bfd_section != NULL
1031 && ((s->flags ^ os->bfd_section->flags)
1032 & (SEC_LOAD | SEC_ALLOC)) == 0)
1034 /* We have already placed a section with this name. */
1035 wild_doit (&os->children, s, os, file);
1040 if (hold_text.os == NULL)
1041 hold_text.os = lang_output_section_find (".text");
1043 /* If this is a final link, then always put .gnu.warning.SYMBOL
1044 sections into the .text section to get them out of the way. */
1045 if (! link_info.shared
1046 && ! link_info.relocateable
1047 && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0
1048 && hold_text.os != NULL)
1050 wild_doit (&hold_text.os->children, s, hold_text.os, file);
1054 /* Decide which segment the section should go in based on the
1055 section name and section flags. We put loadable .note sections
1056 right after the .interp section, so that the PT_NOTE segment is
1057 stored right after the program headers where the OS can read it
1058 in the first page. */
1059 #define HAVE_SECTION(hold, name) \
1060 (hold.os != NULL || (hold.os = lang_output_section_find (name)) != NULL)
1062 if (s->flags & SEC_EXCLUDE)
1066 if ((s->flags & SEC_ALLOC) == 0)
1068 else if ((s->flags & SEC_LOAD) != 0
1069 && strncmp (secname, ".note", 4) == 0
1070 && HAVE_SECTION (hold_interp, ".interp"))
1071 place = &hold_interp;
1072 else if ((s->flags & SEC_HAS_CONTENTS) == 0
1073 && HAVE_SECTION (hold_bss, ".bss"))
1075 else if ((s->flags & SEC_SMALL_DATA) != 0
1076 && HAVE_SECTION (hold_sdata, ".sdata"))
1077 place = &hold_sdata;
1078 else if ((s->flags & SEC_READONLY) == 0
1079 && HAVE_SECTION (hold_data, ".data"))
1081 else if (strncmp (secname, ".rel", 4) == 0
1082 && (hold_rel.os != NULL
1083 || (hold_rel.os = output_rel_find ()) != NULL))
1085 else if ((s->flags & (SEC_CODE | SEC_READONLY)) == SEC_READONLY
1086 && HAVE_SECTION (hold_rodata, ".rodata"))
1087 place = &hold_rodata;
1088 else if ((s->flags & (SEC_CODE | SEC_READONLY)) == (SEC_CODE | SEC_READONLY)
1089 && hold_text.os != NULL)
1094 /* Choose a unique name for the section. This will be needed if the
1095 same section name appears in the input file with different
1096 loadable or allocateable characteristics. */
1097 outsecname = secname;
1098 if (bfd_get_section_by_name (output_bfd, outsecname) != NULL)
1100 outsecname = bfd_get_unique_section_name (output_bfd,
1103 if (outsecname == NULL)
1104 einfo ("%F%P: place_orphan failed: %E\n");
1107 /* Start building a list of statements for this section.
1108 First save the current statement pointer. */
1111 /* If we have found an appropriate place for the output section
1112 statements for this orphan, add them to our own private list,
1113 inserting them later into the global statement list. */
1117 lang_list_init (stat_ptr);
1120 if (config.build_constructors)
1122 /* If the name of the section is representable in C, then create
1123 symbols to mark the start and the end of the section. */
1124 for (ps = outsecname; *ps != '\0'; ps++)
1125 if (! isalnum ((unsigned char) *ps) && *ps != '_')
1130 etree_type *e_align;
1132 symname = (char *) xmalloc (ps - outsecname + sizeof "__start_");
1133 sprintf (symname, "__start_%s", outsecname);
1134 e_align = exp_unop (ALIGN_K,
1135 exp_intop ((bfd_vma) 1 << s->alignment_power));
1136 lang_add_assignment (exp_assop ('=', symname, e_align));
1140 if (link_info.relocateable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)
1141 address = exp_intop ((bfd_vma) 0);
1145 os = lang_enter_output_section_statement (outsecname, address, 0,
1147 (etree_type *) NULL,
1148 (etree_type *) NULL,
1149 (etree_type *) NULL);
1151 wild_doit (&os->children, s, os, file);
1153 lang_leave_output_section_statement
1154 ((bfd_vma) 0, "*default*",
1155 (struct lang_output_section_phdr_list *) NULL, "*default*");
1157 if (config.build_constructors && *ps == '\0')
1161 /* lang_leave_ouput_section_statement resets stat_ptr. Put
1162 stat_ptr back where we want it. */
1166 symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_");
1167 sprintf (symname, "__stop_%s", outsecname);
1168 lang_add_assignment (exp_assop ('=', symname,
1169 exp_nameop (NAME, ".")));
1172 /* Restore the global list pointer. */
1177 asection *snew, **pps;
1179 snew = os->bfd_section;
1180 if (place->section != NULL
1181 || (place->os->bfd_section != NULL
1182 && place->os->bfd_section != snew))
1184 /* Shuffle the section to make the output file look neater.
1185 This is really only cosmetic. */
1186 if (place->section == NULL)
1189 /* Finding the end of the list is a little tricky. We
1190 make a wild stab at it by comparing section flags. */
1191 flagword first_flags = place->os->bfd_section->flags;
1192 for (pps = &place->os->bfd_section->next;
1193 *pps != NULL && (*pps)->flags == first_flags;
1194 pps = &(*pps)->next)
1196 place->section = pps;
1198 /* Put orphans after the first section on the list. */
1199 place->section = &place->os->bfd_section->next;
1203 /* Unlink the section. */
1204 for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
1208 /* Now tack it on to the "place->os" section list. */
1209 snew->next = *place->section;
1210 *place->section = snew;
1212 place->section = &snew->next; /* Save the end of this list. */
1214 if (add.head != NULL)
1216 /* We try to put the output statements in some sort of
1217 reasonable order here, because they determine the final
1218 load addresses of the orphan sections. */
1219 if (place->stmt == NULL)
1221 /* Put the new statement list right at the head. */
1222 *add.tail = place->os->header.next;
1223 place->os->header.next = add.head;
1227 /* Put it after the last orphan statement we added. */
1228 *add.tail = *place->stmt;
1229 *place->stmt = add.head;
1232 /* Fix the global list pointer if we happened to tack our
1233 new list at the tail. */
1234 if (*old->tail == add.head)
1235 old->tail = add.tail;
1237 /* Save the end of this list. */
1238 place->stmt = add.tail;
1248 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1249 cat >>e${EMULATION_NAME}.c <<EOF
1252 gld${EMULATION_NAME}_get_script (isfile)
1256 if test -n "$COMPILE_IN"
1258 # Scripts compiled in.
1260 # sed commands to quote an ld script as a C string.
1261 sc="-f stringify.sed"
1263 cat >>e${EMULATION_NAME}.c <<EOF
1267 if (link_info.relocateable == true && config.build_constructors == true)
1270 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1271 echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
1272 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1273 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1274 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1275 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1276 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1278 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1279 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1280 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1283 echo ' ; else return' >> e${EMULATION_NAME}.c
1284 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1285 echo '; }' >> e${EMULATION_NAME}.c
1288 # Scripts read from the filesystem.
1290 cat >>e${EMULATION_NAME}.c <<EOF
1294 if (link_info.relocateable == true && config.build_constructors == true)
1295 return "ldscripts/${EMULATION_NAME}.xu";
1296 else if (link_info.relocateable == true)
1297 return "ldscripts/${EMULATION_NAME}.xr";
1298 else if (!config.text_read_only)
1299 return "ldscripts/${EMULATION_NAME}.xbn";
1300 else if (!config.magic_demand_paged)
1301 return "ldscripts/${EMULATION_NAME}.xn";
1302 else if (link_info.shared)
1303 return "ldscripts/${EMULATION_NAME}.xs";
1305 return "ldscripts/${EMULATION_NAME}.x";
1312 if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1314 if test x"$LDEMUL_PARSE_ARGS" != xgld"$EMULATION_NAME"_parse_args; then
1316 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
1317 cat >>e${EMULATION_NAME}.c <<EOF
1318 $PARSE_AND_LIST_PROLOGUE
1322 cat >>e${EMULATION_NAME}.c <<EOF
1326 #define OPTION_DISABLE_NEW_DTAGS (400)
1327 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
1329 static struct option longopts[] =
1333 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1334 cat >>e${EMULATION_NAME}.c <<EOF
1335 /* getopt allows abbreviations, so we do this to stop it from
1336 treating -d/-e as abbreviations for these options. */
1337 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
1338 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
1339 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
1340 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
1344 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
1345 cat >>e${EMULATION_NAME}.c <<EOF
1346 $PARSE_AND_LIST_LONGOPTS
1350 cat >>e${EMULATION_NAME}.c <<EOF
1351 {NULL, no_argument, NULL, 0}
1355 static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **));
1358 gld${EMULATION_NAME}_parse_args (argc, argv)
1364 static int prevoptind = -1;
1365 int prevopterr = opterr;
1368 if (prevoptind != optind)
1372 prevoptind = optind;
1374 optc = getopt_long_only (argc, argv,
1375 "-${PARSE_AND_LIST_SHORTOPTS}z:", longopts,
1377 opterr = prevopterr;
1384 optind = prevoptind;
1389 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1390 cat >>e${EMULATION_NAME}.c <<EOF
1391 case OPTION_DISABLE_NEW_DTAGS:
1392 link_info.new_dtags = false;
1395 case OPTION_ENABLE_NEW_DTAGS:
1396 link_info.new_dtags = true;
1400 if (strcmp (optarg, "initfirst") == 0)
1401 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
1402 else if (strcmp (optarg, "interpose") == 0)
1403 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
1404 else if (strcmp (optarg, "loadfltr") == 0)
1405 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
1406 else if (strcmp (optarg, "nodefaultlib") == 0)
1407 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
1408 else if (strcmp (optarg, "nodelete") == 0)
1409 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
1410 else if (strcmp (optarg, "nodlopen") == 0)
1411 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
1412 else if (strcmp (optarg, "nodump") == 0)
1413 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
1414 else if (strcmp (optarg, "now") == 0)
1416 link_info.flags |= (bfd_vma) DF_BIND_NOW;
1417 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
1419 else if (strcmp (optarg, "origin") == 0)
1421 link_info.flags |= (bfd_vma) DF_ORIGIN;
1422 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
1424 /* What about the other Solaris -z options? FIXME. */
1429 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
1430 cat >>e${EMULATION_NAME}.c <<EOF
1431 $PARSE_AND_LIST_ARGS_CASES
1435 cat >>e${EMULATION_NAME}.c <<EOF
1444 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
1445 cat >>e${EMULATION_NAME}.c <<EOF
1447 static void gld${EMULATION_NAME}_list_options PARAMS ((FILE * file));
1450 gld${EMULATION_NAME}_list_options (file)
1455 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1456 cat >>e${EMULATION_NAME}.c <<EOF
1457 fprintf (file, _(" --disable-new-dtags\tDisable new dynamic tags\n"));
1458 fprintf (file, _(" --enable-new-dtags\tEnable new dynamic tags\n"));
1459 fprintf (file, _(" -z initfirst\t\tMark DSO to be initialized first at rutime\n"));
1460 fprintf (file, _(" -z interpose\t\tMark object to interpose all DSOs but execuable\n"));
1461 fprintf (file, _(" -z loadfltr\t\tMark object requiring immediate process\n"));
1462 fprintf (file, _(" -z nodefaultlib\tMark object not to use default search paths\n"));
1463 fprintf (file, _(" -z nodelete\t\tMark DSO non-deletable at runtime\n"));
1464 fprintf (file, _(" -z nodlopen\t\tMark DSO not availale to dlopen\n"));
1465 fprintf (file, _(" -z nodump\t\tMark DSO not availale to dldump\n"));
1466 fprintf (file, _(" -z now\t\tMark object non-lazy runtime binding\n"));
1467 fprintf (file, _(" -z origin\t\tMark object requiring immediate \$ORIGIN processing\n"));
1468 fprintf (file, _("\t\t\t at runtime\n"));
1469 fprintf (file, _(" -z KEYWORD\t\tIgnored for Solaris compatibility\n"));
1473 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
1474 cat >>e${EMULATION_NAME}.c <<EOF
1475 $PARSE_AND_LIST_OPTIONS
1479 cat >>e${EMULATION_NAME}.c <<EOF
1483 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
1484 cat >>e${EMULATION_NAME}.c <<EOF
1485 $PARSE_AND_LIST_EPILOGUE
1490 if test x"$LDEMUL_PARSE_ARGS" != xgld"$EMULATION_NAME"_parse_args; then
1491 cat >>e${EMULATION_NAME}.c <<EOF
1492 #define gld${EMULATION_NAME}_parse_args NULL
1495 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
1496 cat >>e${EMULATION_NAME}.c <<EOF
1497 #define gld${EMULATION_NAME}_list_options NULL
1502 cat >>e${EMULATION_NAME}.c <<EOF
1504 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1506 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
1507 ${LDEMUL_SYSLIB-syslib_default},
1508 ${LDEMUL_HLL-hll_default},
1509 ${LDEMUL_AFTER_PARSE-after_parse_default},
1510 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
1511 ${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
1512 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
1513 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
1514 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
1515 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
1516 "${EMULATION_NAME}",
1518 ${LDEMUL_FINISH-NULL},
1519 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
1520 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
1521 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
1522 ${LDEMUL_SET_SYMBOLS-NULL},
1523 ${LDEMUL_PARSE_ARGS-gld${EMULATION_NAME}_parse_args},
1524 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
1525 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
1526 ${LDEMUL_RECOGNIZED_FILE-NULL},
1527 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},