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 int count = 1;
1012 struct orphan_save *place;
1013 lang_statement_list_type *old = NULL;
1014 lang_statement_list_type add;
1015 etree_type *address;
1016 const char *secname;
1017 const char *outsecname;
1018 const char *ps = NULL;
1019 lang_output_section_statement_type *os;
1021 secname = bfd_get_section_name (s->owner, s);
1023 if (! config.unique_orphan_sections)
1025 /* Look through the script to see where to place this section. */
1026 os = lang_output_section_find (secname);
1029 && os->bfd_section != NULL
1030 && ((s->flags ^ os->bfd_section->flags)
1031 & (SEC_LOAD | SEC_ALLOC)) == 0)
1033 /* We have already placed a section with this name. */
1034 wild_doit (&os->children, s, os, file);
1039 if (hold_text.os == NULL)
1040 hold_text.os = lang_output_section_find (".text");
1042 /* If this is a final link, then always put .gnu.warning.SYMBOL
1043 sections into the .text section to get them out of the way. */
1044 if (! link_info.shared
1045 && ! link_info.relocateable
1046 && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0
1047 && hold_text.os != NULL)
1049 wild_doit (&hold_text.os->children, s, hold_text.os, file);
1053 /* Decide which segment the section should go in based on the
1054 section name and section flags. We put loadable .note sections
1055 right after the .interp section, so that the PT_NOTE segment is
1056 stored right after the program headers where the OS can read it
1057 in the first page. */
1058 #define HAVE_SECTION(hold, name) \
1059 (hold.os != NULL || (hold.os = lang_output_section_find (name)) != NULL)
1061 if (s->flags & SEC_EXCLUDE)
1063 else if ((s->flags & SEC_ALLOC) == 0)
1065 else if ((s->flags & SEC_LOAD) != 0
1066 && strncmp (secname, ".note", 4) == 0
1067 && HAVE_SECTION (hold_interp, ".interp"))
1068 place = &hold_interp;
1069 else if ((s->flags & SEC_HAS_CONTENTS) == 0
1070 && HAVE_SECTION (hold_bss, ".bss"))
1072 else if ((s->flags & SEC_READONLY) == 0
1073 && HAVE_SECTION (hold_data, ".data"))
1075 else if (strncmp (secname, ".rel", 4) == 0
1076 && (hold_rel.os != NULL
1077 || (hold_rel.os = output_rel_find ()) != NULL))
1079 else if ((s->flags & SEC_CODE) == 0
1080 && (s->flags & SEC_READONLY) != 0
1081 && HAVE_SECTION (hold_rodata, ".rodata"))
1082 place = &hold_rodata;
1083 else if ((s->flags & SEC_READONLY) != 0
1084 && hold_text.os != NULL)
1091 /* Choose a unique name for the section. This will be needed if the
1092 same section name appears in the input file with different
1093 loadable or allocateable characteristics. */
1094 outsecname = secname;
1095 if (bfd_get_section_by_name (output_bfd, outsecname) != NULL)
1096 outsecname = bfd_get_unique_section_name (output_bfd,
1102 /* Start building a list of statements for this section. */
1105 lang_list_init (stat_ptr);
1107 /* If the name of the section is representable in C, then create
1108 symbols to mark the start and the end of the section. */
1109 for (ps = outsecname; *ps != '\0'; ps++)
1110 if (! isalnum ((unsigned char) *ps) && *ps != '_')
1112 if (*ps == '\0' && config.build_constructors)
1115 etree_type *e_align;
1117 symname = (char *) xmalloc (ps - outsecname + sizeof "__start_");
1118 sprintf (symname, "__start_%s", outsecname);
1119 e_align = exp_unop (ALIGN_K,
1120 exp_intop ((bfd_vma) 1 << s->alignment_power));
1121 lang_add_assignment (exp_assop ('=', symname, e_align));
1125 if (link_info.relocateable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)
1126 address = exp_intop ((bfd_vma) 0);
1130 os = lang_enter_output_section_statement (outsecname, address, 0,
1132 (etree_type *) NULL,
1133 (etree_type *) NULL,
1134 (etree_type *) NULL);
1136 wild_doit (&os->children, s, os, file);
1138 lang_leave_output_section_statement
1139 ((bfd_vma) 0, "*default*",
1140 (struct lang_output_section_phdr_list *) NULL, "*default*");
1144 asection *snew, **pps;
1148 if (*ps == '\0' && config.build_constructors)
1152 symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_");
1153 sprintf (symname, "__stop_%s", outsecname);
1154 lang_add_assignment (exp_assop ('=', symname,
1155 exp_nameop (NAME, ".")));
1159 snew = os->bfd_section;
1160 if (place->section != NULL
1161 || (place->os->bfd_section != NULL
1162 && place->os->bfd_section != snew))
1164 /* Shuffle the section to make the output file look neater. */
1165 if (place->section == NULL)
1168 /* Finding the end of the list is a little tricky. We
1169 make a wild stab at it by comparing section flags. */
1170 flagword first_flags = place->os->bfd_section->flags;
1171 for (pps = &place->os->bfd_section->next;
1172 *pps != NULL && (*pps)->flags == first_flags;
1173 pps = &(*pps)->next)
1175 place->section = pps;
1177 /* Put orphans after the first section on the list. */
1178 place->section = &place->os->bfd_section->next;
1182 /* Unlink the section. */
1183 for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
1187 /* Now tack it on to the "place->os" section list. */
1188 snew->next = *place->section;
1189 *place->section = snew;
1191 place->section = &snew->next; /* Save the end of this list. */
1193 if (place->stmt == NULL)
1195 /* Put the new statement list right at the head. */
1196 *add.tail = place->os->header.next;
1197 place->os->header.next = add.head;
1201 /* Put it after the last orphan statement we added. */
1202 *add.tail = *place->stmt;
1203 *place->stmt = add.head;
1205 place->stmt = add.tail; /* Save the end of this list. */
1214 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1215 cat >>e${EMULATION_NAME}.c <<EOF
1218 gld${EMULATION_NAME}_get_script (isfile)
1222 if test -n "$COMPILE_IN"
1224 # Scripts compiled in.
1226 # sed commands to quote an ld script as a C string.
1227 sc="-f stringify.sed"
1229 cat >>e${EMULATION_NAME}.c <<EOF
1233 if (link_info.relocateable == true && config.build_constructors == true)
1236 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1237 echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
1238 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1239 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1240 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1241 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1242 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1244 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1245 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1246 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1249 echo ' ; else return' >> e${EMULATION_NAME}.c
1250 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1251 echo '; }' >> e${EMULATION_NAME}.c
1254 # Scripts read from the filesystem.
1256 cat >>e${EMULATION_NAME}.c <<EOF
1260 if (link_info.relocateable == true && config.build_constructors == true)
1261 return "ldscripts/${EMULATION_NAME}.xu";
1262 else if (link_info.relocateable == true)
1263 return "ldscripts/${EMULATION_NAME}.xr";
1264 else if (!config.text_read_only)
1265 return "ldscripts/${EMULATION_NAME}.xbn";
1266 else if (!config.magic_demand_paged)
1267 return "ldscripts/${EMULATION_NAME}.xn";
1268 else if (link_info.shared)
1269 return "ldscripts/${EMULATION_NAME}.xs";
1271 return "ldscripts/${EMULATION_NAME}.x";
1278 if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1280 if test x"$LDEMUL_PARSE_ARGS" != xgld"$EMULATION_NAME"_parse_args; then
1282 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
1283 cat >>e${EMULATION_NAME}.c <<EOF
1284 $PARSE_AND_LIST_PROLOGUE
1288 cat >>e${EMULATION_NAME}.c <<EOF
1292 #define OPTION_DISABLE_NEW_DTAGS (400)
1293 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
1295 static struct option longopts[] =
1299 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1300 cat >>e${EMULATION_NAME}.c <<EOF
1301 /* getopt allows abbreviations, so we do this to stop it from
1302 treating -d/-e as abbreviations for these options. */
1303 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
1304 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
1305 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
1306 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
1310 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
1311 cat >>e${EMULATION_NAME}.c <<EOF
1312 $PARSE_AND_LIST_LONGOPTS
1316 cat >>e${EMULATION_NAME}.c <<EOF
1317 {NULL, no_argument, NULL, 0}
1321 static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **));
1324 gld${EMULATION_NAME}_parse_args (argc, argv)
1330 static int prevoptind = -1;
1331 int prevopterr = opterr;
1334 if (prevoptind != optind)
1338 prevoptind = optind;
1340 optc = getopt_long_only (argc, argv,
1341 "-${PARSE_AND_LIST_SHORTOPTS}z:", longopts,
1343 opterr = prevopterr;
1350 optind = prevoptind;
1355 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1356 cat >>e${EMULATION_NAME}.c <<EOF
1357 case OPTION_DISABLE_NEW_DTAGS:
1358 link_info.new_dtags = false;
1361 case OPTION_ENABLE_NEW_DTAGS:
1362 link_info.new_dtags = true;
1366 if (strcmp (optarg, "initfirst") == 0)
1367 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
1368 else if (strcmp (optarg, "interpose") == 0)
1369 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
1370 else if (strcmp (optarg, "loadfltr") == 0)
1371 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
1372 else if (strcmp (optarg, "nodefaultlib") == 0)
1373 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
1374 else if (strcmp (optarg, "nodelete") == 0)
1375 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
1376 else if (strcmp (optarg, "nodlopen") == 0)
1377 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
1378 else if (strcmp (optarg, "nodump") == 0)
1379 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
1380 else if (strcmp (optarg, "now") == 0)
1382 link_info.flags |= (bfd_vma) DF_BIND_NOW;
1383 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
1385 else if (strcmp (optarg, "origin") == 0)
1387 link_info.flags |= (bfd_vma) DF_ORIGIN;
1388 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
1390 /* What about the other Solaris -z options? FIXME. */
1395 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
1396 cat >>e${EMULATION_NAME}.c <<EOF
1397 $PARSE_AND_LIST_ARGS_CASES
1401 cat >>e${EMULATION_NAME}.c <<EOF
1410 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
1411 cat >>e${EMULATION_NAME}.c <<EOF
1413 static void gld${EMULATION_NAME}_list_options PARAMS ((FILE * file));
1416 gld${EMULATION_NAME}_list_options (file)
1421 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1422 cat >>e${EMULATION_NAME}.c <<EOF
1423 fprintf (file, _(" --disable-new-dtags\tDisable new dynamic tags\n"));
1424 fprintf (file, _(" --enable-new-dtags\tEnable new dynamic tags\n"));
1425 fprintf (file, _(" -z initfirst\t\tMark DSO to be initialized first at rutime\n"));
1426 fprintf (file, _(" -z interpose\t\tMark object to interpose all DSOs but execuable\n"));
1427 fprintf (file, _(" -z loadfltr\t\tMark object requiring immediate process\n"));
1428 fprintf (file, _(" -z nodefaultlib\tMark object not to use default search paths\n"));
1429 fprintf (file, _(" -z nodelete\t\tMark DSO non-deletable at runtime\n"));
1430 fprintf (file, _(" -z nodlopen\t\tMark DSO not availale to dlopen\n"));
1431 fprintf (file, _(" -z nodump\t\tMark DSO not availale to dldump\n"));
1432 fprintf (file, _(" -z now\t\tMark object non-lazy runtime binding\n"));
1433 fprintf (file, _(" -z origin\t\tMark object requiring immediate \$ORIGIN processing\n"));
1434 fprintf (file, _("\t\t\t at runtime\n"));
1435 fprintf (file, _(" -z KEYWORD\t\tIgnored for Solaris compatibility\n"));
1439 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
1440 cat >>e${EMULATION_NAME}.c <<EOF
1441 $PARSE_AND_LIST_OPTIONS
1445 cat >>e${EMULATION_NAME}.c <<EOF
1449 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
1450 cat >>e${EMULATION_NAME}.c <<EOF
1451 $PARSE_AND_LIST_EPILOGUE
1456 if test x"$LDEMUL_PARSE_ARGS" != xgld"$EMULATION_NAME"_parse_args; then
1457 cat >>e${EMULATION_NAME}.c <<EOF
1458 #define gld${EMULATION_NAME}_parse_args NULL
1461 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
1462 cat >>e${EMULATION_NAME}.c <<EOF
1463 #define gld${EMULATION_NAME}_list_options NULL
1468 cat >>e${EMULATION_NAME}.c <<EOF
1470 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1472 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
1473 ${LDEMUL_SYSLIB-syslib_default},
1474 ${LDEMUL_HLL-hll_default},
1475 ${LDEMUL_AFTER_PARSE-after_parse_default},
1476 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
1477 ${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
1478 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
1479 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
1480 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
1481 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
1482 "${EMULATION_NAME}",
1484 ${LDEMUL_FINISH-NULL},
1485 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
1486 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
1487 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
1488 ${LDEMUL_SET_SYMBOLS-NULL},
1489 ${LDEMUL_PARSE_ARGS-gld${EMULATION_NAME}_parse_args},
1490 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
1491 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
1492 ${LDEMUL_RECOGNIZED_FILE-NULL},
1493 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},