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 "${ELFSIZE}" && ELFSIZE=32
6 if [ -z "$MACHINE" ]; then
9 OUTPUT_ARCH=${ARCH}:${MACHINE}
12 /* This file is is generated by a shell script. DO NOT EDIT! */
14 /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
15 Copyright (C) 1991-2014 Free Software Foundation, Inc.
16 Written by Steve Chamberlain <sac@cygnus.com>
17 ELF support by Ian Lance Taylor <ian@cygnus.com>
19 This file is part of the GNU Binutils.
21 This program is free software; you can redistribute it and/or modify
22 it under the terms of the GNU General Public License as published by
23 the Free Software Foundation; either version 3 of the License, or
24 (at your option) any later version.
26 This program is distributed in the hope that it will be useful,
27 but WITHOUT ANY WARRANTY; without even the implied warranty of
28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 GNU General Public License for more details.
31 You should have received a copy of the GNU General Public License
32 along with this program; if not, write to the Free Software
33 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
34 MA 02110-1301, USA. */
36 #define TARGET_IS_${EMULATION_NAME}
40 #include "libiberty.h"
41 #include "safe-ctype.h"
42 #include "filenames.h"
55 #include "ldbuildid.h"
57 #include "elf/common.h"
59 #include "filenames.h"
61 /* Declare functions used by various EXTRA_EM_FILEs. */
62 static void gld${EMULATION_NAME}_before_parse (void);
63 static void gld${EMULATION_NAME}_after_open (void);
64 static void gld${EMULATION_NAME}_before_allocation (void);
65 static void gld${EMULATION_NAME}_after_allocation (void);
66 static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan
67 (asection *, const char *, int);
70 if [ "x${USE_LIBPATH}" = xyes ] ; then
72 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
82 # Import any needed special functions and/or overrides.
84 source_em ${srcdir}/emultempl/elf-generic.em
85 if test -n "$EXTRA_EM_FILE" ; then
86 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
89 # Functions in this file can be overridden by setting the LDEMUL_* shell
90 # variables. If the name of the overriding function is the same as is
91 # defined in this file, then don't output this file's version.
92 # If a different overriding name is given then output the standard function
93 # as presumably it is called from the overriding function.
95 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
99 gld${EMULATION_NAME}_before_parse (void)
101 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
102 input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
103 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
104 config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
110 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
112 /* Handle the generation of DT_NEEDED tags. */
115 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
119 /* Tell the ELF linker that we don't want the output file to have a
120 DT_NEEDED entry for this file, unless it is used to resolve
121 references in a regular object. */
122 if (entry->flags.add_DT_NEEDED_for_regular)
123 link_class = DYN_AS_NEEDED;
125 /* Tell the ELF linker that we don't want the output file to have a
126 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
128 if (!entry->flags.add_DT_NEEDED_for_dynamic)
129 link_class |= DYN_NO_ADD_NEEDED;
131 if (entry->flags.just_syms
132 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
133 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
137 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
140 bfd_elf_set_dyn_lib_class (entry->the_bfd,
141 (enum dynamic_lib_link_class) link_class);
143 /* Continue on with normal load_symbols processing. */
151 /* These variables are required to pass information back and forth
152 between after_open and check_needed and stat_needed and vercheck. */
154 static struct bfd_link_needed_list *global_needed;
155 static struct stat global_stat;
156 static lang_input_statement_type *global_found;
157 static struct bfd_link_needed_list *global_vercheck_needed;
158 static bfd_boolean global_vercheck_failed;
160 /* These variables are used to implement target options */
162 static char *audit; /* colon (typically) separated list of libs */
163 static char *depaudit; /* colon (typically) separated list of libs */
165 /* Style of .note.gnu.build-id section. */
166 static const char *emit_note_gnu_build_id;
168 /* On Linux, it's possible to have different versions of the same
169 shared library linked against different versions of libc. The
170 dynamic linker somehow tags which libc version to use in
171 /etc/ld.so.cache, and, based on the libc that it sees in the
172 executable, chooses which version of the shared library to use.
174 We try to do a similar check here by checking whether this shared
175 library needs any other shared libraries which may conflict with
176 libraries we have already included in the link. If it does, we
177 skip it, and try to find another shared library farther on down the
180 This is called via lang_for_each_input_file.
181 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
182 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
183 a conflicting version. */
186 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
189 struct bfd_link_needed_list *l;
191 if (global_vercheck_failed)
193 if (s->the_bfd == NULL
194 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
197 soname = bfd_elf_get_dt_soname (s->the_bfd);
199 soname = lbasename (bfd_get_filename (s->the_bfd));
201 for (l = global_vercheck_needed; l != NULL; l = l->next)
205 if (filename_cmp (soname, l->name) == 0)
207 /* Probably can't happen, but it's an easy check. */
211 if (strchr (l->name, '/') != NULL)
214 suffix = strstr (l->name, ".so.");
218 suffix += sizeof ".so." - 1;
220 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
222 /* Here we know that S is a dynamic object FOO.SO.VER1, and
223 the object we are considering needs a dynamic object
224 FOO.SO.VER2, and VER1 and VER2 are different. This
225 appears to be a version mismatch, so we tell the caller
226 to try a different version of this library. */
227 global_vercheck_failed = TRUE;
234 /* See if an input file matches a DT_NEEDED entry by running stat on
238 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
244 if (global_found != NULL)
246 if (s->the_bfd == NULL)
249 /* If this input file was an as-needed entry, and wasn't found to be
250 needed at the stage it was linked, then don't say we have loaded it. */
251 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
254 if (bfd_stat (s->the_bfd, &st) != 0)
256 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
260 /* Some operating systems, e.g. Windows, do not provide a meaningful
261 st_ino; they always set it to zero. (Windows does provide a
262 meaningful st_dev.) Do not indicate a duplicate library in that
263 case. While there is no guarantee that a system that provides
264 meaningful inode numbers will never set st_ino to zero, this is
265 merely an optimization, so we do not need to worry about false
267 if (st.st_dev == global_stat.st_dev
268 && st.st_ino == global_stat.st_ino
275 /* We issue a warning if it looks like we are including two
276 different versions of the same shared library. For example,
277 there may be a problem if -lc picks up libc.so.6 but some other
278 shared library has a DT_NEEDED entry of libc.so.5. This is a
279 heuristic test, and it will only work if the name looks like
280 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
281 If we really want to issue warnings about mixing version numbers
282 of shared libraries, we need to find a better way. */
284 if (strchr (global_needed->name, '/') != NULL)
286 suffix = strstr (global_needed->name, ".so.");
289 suffix += sizeof ".so." - 1;
291 soname = bfd_elf_get_dt_soname (s->the_bfd);
293 soname = lbasename (s->filename);
295 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
296 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
297 global_needed->name, global_needed->by, soname);
306 /* This function is called for each possible name for a dynamic object
307 named by a DT_NEEDED entry. The FORCE parameter indicates whether
308 to skip the check for a conflicting version. */
311 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
315 const char *name = needed->name;
319 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
323 /* Linker needs to decompress sections. */
324 abfd->flags |= BFD_DECOMPRESS;
326 if (! bfd_check_format (abfd, bfd_object))
331 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
337 /* For DT_NEEDED, they have to match. */
338 if (abfd->xvec != link_info.output_bfd->xvec)
344 /* Check whether this object would include any conflicting library
345 versions. If FORCE is set, then we skip this check; we use this
346 the second time around, if we couldn't find any compatible
347 instance of the shared library. */
351 struct bfd_link_needed_list *needs;
353 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
354 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
358 global_vercheck_needed = needs;
359 global_vercheck_failed = FALSE;
360 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
361 if (global_vercheck_failed)
364 /* Return FALSE to force the caller to move on to try
365 another file on the search path. */
369 /* But wait! It gets much worse. On Linux, if a shared
370 library does not use libc at all, we are supposed to skip
371 it the first time around in case we encounter a shared
372 library later on with the same name which does use the
373 version of libc that we want. This is much too horrible
374 to use on any system other than Linux. */
378 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
381 struct bfd_link_needed_list *l;
383 for (l = needs; l != NULL; l = l->next)
384 if (CONST_STRNEQ (l->name, "libc.so"))
400 /* We've found a dynamic object matching the DT_NEEDED entry. */
402 /* We have already checked that there is no other input file of the
403 same name. We must now check again that we are not including the
404 same file twice. We need to do this because on many systems
405 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
406 reference libc.so.1. If we have already included libc.so, we
407 don't want to include libc.so.1 if they are the same file, and we
408 can only check that using stat. */
410 if (bfd_stat (abfd, &global_stat) != 0)
411 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
413 /* First strip off everything before the last '/'. */
414 soname = lbasename (abfd->filename);
417 info_msg (_("found %s at %s\n"), soname, name);
420 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
421 if (global_found != NULL)
423 /* Return TRUE to indicate that we found the file, even though
424 we aren't going to do anything with it. */
428 /* Specify the soname to use. */
429 bfd_elf_set_dt_needed_name (abfd, soname);
431 /* Tell the ELF linker that we don't want the output file to have a
432 DT_NEEDED entry for this file, unless it is used to resolve
433 references in a regular object. */
434 link_class = DYN_DT_NEEDED;
436 /* Tell the ELF linker that we don't want the output file to have a
437 DT_NEEDED entry for this file at all if the entry is from a file
438 with DYN_NO_ADD_NEEDED. */
439 if (needed->by != NULL
440 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
441 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
443 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
445 /* Add this file into the symbol table. */
446 if (! bfd_link_add_symbols (abfd, &link_info))
447 einfo ("%F%B: error adding symbols: %E\n", abfd);
453 /* Search for a needed file in a path. */
456 gld${EMULATION_NAME}_search_needed (const char *path,
457 struct dt_needed *n, int force)
460 const char *name = n->name;
462 struct dt_needed needed;
465 return gld${EMULATION_NAME}_try_needed (n, force);
467 if (path == NULL || *path == '\0')
471 needed.name = n->name;
476 char *filename, *sset;
478 s = strchr (path, config.rpath_separator);
480 s = path + strlen (path);
482 #if HAVE_DOS_BASED_FILE_SYSTEM
483 /* Assume a match on the second char is part of drive specifier. */
484 else if (config.rpath_separator == ':'
488 s = strchr (s + 1, config.rpath_separator);
490 s = path + strlen (path);
493 filename = (char *) xmalloc (s - path + len + 2);
498 memcpy (filename, path, s - path);
499 filename[s - path] = '/';
500 sset = filename + (s - path) + 1;
504 needed.name = filename;
505 if (gld${EMULATION_NAME}_try_needed (&needed, force))
519 if [ "x${USE_LIBPATH}" = xyes ] ; then
522 /* Add the sysroot to every entry in a path separated by
523 config.rpath_separator. */
526 gld${EMULATION_NAME}_add_sysroot (const char *path)
535 if (path[i++] == config.rpath_separator)
541 len = len + (colons + 1) * strlen (ld_sysroot);
542 ret = xmalloc (len + 1);
543 strcpy (ret, ld_sysroot);
544 p = ret + strlen (ret);
547 if (path[i] == config.rpath_separator)
550 strcpy (p, ld_sysroot);
562 *-*-freebsd* | *-*-dragonfly*)
564 /* Read the system search path the FreeBSD way rather than the Linux way. */
565 #ifdef HAVE_ELF_HINTS_H
566 #include <elf-hints.h>
568 #include "elf-hints-local.h"
572 gld${EMULATION_NAME}_check_ld_elf_hints (const struct bfd_link_needed_list *l,
575 static bfd_boolean initialized;
576 static char *ld_elf_hints;
577 struct dt_needed needed;
584 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
585 f = fopen (tmppath, FOPEN_RB);
589 struct elfhints_hdr hdr;
591 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
592 && hdr.magic == ELFHINTS_MAGIC
595 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
599 b = xmalloc (hdr.dirlistlen + 1);
600 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
602 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
613 if (ld_elf_hints == NULL)
617 needed.name = l->name;
618 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, &needed, force);
624 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
626 /* For a native linker, check the file /etc/ld.so.conf for directories
627 in which we may find shared libraries. /etc/ld.so.conf is really
628 only meaningful on Linux. */
630 struct gld${EMULATION_NAME}_ld_so_conf
637 gld${EMULATION_NAME}_parse_ld_so_conf
638 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
641 gld${EMULATION_NAME}_parse_ld_so_conf_include
642 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
650 if (pattern[0] != '/')
652 char *p = strrchr (filename, '/');
653 size_t patlen = strlen (pattern) + 1;
655 newp = xmalloc (p - filename + 1 + patlen);
656 memcpy (newp, filename, p - filename + 1);
657 memcpy (newp + (p - filename + 1), pattern, patlen);
662 if (glob (pattern, 0, NULL, &gl) == 0)
666 for (i = 0; i < gl.gl_pathc; ++i)
667 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
671 /* If we do not have glob, treat the pattern as a literal filename. */
672 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
680 gld${EMULATION_NAME}_parse_ld_so_conf
681 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
683 FILE *f = fopen (filename, FOPEN_RT);
691 line = xmalloc (linelen);
696 /* Normally this would use getline(3), but we need to be portable. */
697 while ((q = fgets (p, linelen - (p - line), f)) != NULL
698 && strlen (q) == linelen - (p - line) - 1
699 && line[linelen - 2] != '\n')
701 line = xrealloc (line, 2 * linelen);
702 p = line + linelen - 1;
706 if (q == NULL && p == line)
709 p = strchr (line, '\n');
713 /* Because the file format does not know any form of quoting we
714 can search forward for the next '#' character and if found
715 make it terminating the line. */
716 p = strchr (line, '#');
720 /* Remove leading whitespace. NUL is no whitespace character. */
722 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
725 /* If the line is blank it is ignored. */
729 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
735 while (*p == ' ' || *p == '\t')
743 while (*p != ' ' && *p != '\t' && *p)
749 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
757 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
758 && *p != '\r' && *p != '\v')
761 while (p != dir && p[-1] == '/')
763 if (info->path == NULL)
765 info->alloc = p - dir + 1 + 256;
766 info->path = xmalloc (info->alloc);
771 if (info->len + 1 + (p - dir) >= info->alloc)
773 info->alloc += p - dir + 256;
774 info->path = xrealloc (info->path, info->alloc);
776 info->path[info->len++] = config.rpath_separator;
778 memcpy (info->path + info->len, dir, p - dir);
779 info->len += p - dir;
780 info->path[info->len] = '\0';
790 gld${EMULATION_NAME}_check_ld_so_conf (const struct bfd_link_needed_list *l,
793 static bfd_boolean initialized;
794 static char *ld_so_conf;
795 struct dt_needed needed;
800 struct gld${EMULATION_NAME}_ld_so_conf info;
803 info.len = info.alloc = 0;
804 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
805 (const char *) NULL);
806 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
809 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
810 (const char *) NULL);
811 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
817 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
824 if (ld_so_conf == NULL)
829 needed.name = l->name;
830 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
840 /* See if an input file matches a DT_NEEDED entry by name. */
843 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
847 /* Stop looking if we've found a loaded lib. */
848 if (global_found != NULL
849 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
850 & DYN_AS_NEEDED) == 0)
853 if (s->filename == NULL || s->the_bfd == NULL)
856 /* Don't look for a second non-loaded as-needed lib. */
857 if (global_found != NULL
858 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
861 if (filename_cmp (s->filename, global_needed->name) == 0)
867 if (s->flags.search_dirs)
869 const char *f = strrchr (s->filename, '/');
871 && filename_cmp (f + 1, global_needed->name) == 0)
878 soname = bfd_elf_get_dt_soname (s->the_bfd);
880 && filename_cmp (soname, global_needed->name) == 0)
889 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
893 id_note_section_size (bfd *abfd ATTRIBUTE_UNUSED)
895 const char *style = emit_note_gnu_build_id;
897 bfd_size_type build_id_size;
899 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
900 size = (size + 3) & -(bfd_size_type) 4;
902 build_id_size = compute_build_id_size (style);
904 size += build_id_size;
912 write_build_id (bfd *abfd)
914 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
915 struct elf_obj_tdata *t = elf_tdata (abfd);
918 Elf_Internal_Shdr *i_shdr;
919 unsigned char *contents, *id_bits;
922 Elf_External_Note *e_note;
924 style = t->o->build_id.style;
925 asec = t->o->build_id.sec;
926 if (bfd_is_abs_section (asec->output_section))
928 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
929 " --build-id ignored.\n"));
932 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
934 if (i_shdr->contents == NULL)
936 if (asec->contents == NULL)
937 asec->contents = (unsigned char *) xmalloc (asec->size);
938 contents = asec->contents;
941 contents = i_shdr->contents + asec->output_offset;
943 e_note = (Elf_External_Note *) contents;
944 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
945 size = (size + 3) & -(bfd_size_type) 4;
946 id_bits = contents + size;
947 size = asec->size - size;
949 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
950 bfd_h_put_32 (abfd, size, &e_note->descsz);
951 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
952 memcpy (e_note->name, "GNU", sizeof "GNU");
954 generate_build_id (abfd, style, bed->s->checksum_contents, id_bits, size);
956 position = i_shdr->sh_offset + asec->output_offset;
958 return (bfd_seek (abfd, position, SEEK_SET) == 0
959 && bfd_bwrite (contents, size, abfd) == size);
962 /* Make .note.gnu.build-id section, and set up elf_tdata->build_id. */
965 setup_build_id (bfd *ibfd)
971 size = id_note_section_size (ibfd);
974 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
978 flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
979 | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
980 s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags);
981 if (s != NULL && bfd_set_section_alignment (ibfd, s, 2))
983 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
984 t->o->build_id.after_write_object_contents = &write_build_id;
985 t->o->build_id.style = emit_note_gnu_build_id;
986 t->o->build_id.sec = s;
987 elf_section_type (s) = SHT_NOTE;
992 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
993 " --build-id ignored.\n");
997 /* This is called after all the input files have been opened. */
1000 gld${EMULATION_NAME}_after_open (void)
1002 struct bfd_link_needed_list *needed, *l;
1003 struct elf_link_hash_table *htab;
1005 after_open_default ();
1007 htab = elf_hash_table (&link_info);
1008 if (!is_elf_hash_table (htab))
1011 if (emit_note_gnu_build_id != NULL)
1015 /* Find an ELF input. */
1016 for (abfd = link_info.input_bfds;
1017 abfd != (bfd *) NULL; abfd = abfd->link_next)
1018 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1021 /* PR 10555: If there are no ELF input files do not try to
1022 create a .note.gnu-build-id section. */
1024 || !setup_build_id (abfd))
1026 free ((char *) emit_note_gnu_build_id);
1027 emit_note_gnu_build_id = NULL;
1031 if (link_info.relocatable)
1033 if (link_info.execstack == ! link_info.noexecstack)
1034 /* PR ld/16744: If "-z [no]execstack" has been specified on the
1035 command line and we are perfoming a relocatable link then no
1036 PT_GNU_STACK segment will be created and so the
1037 linkinfo.[no]execstack values set in _handle_option() will have no
1038 effect. Instead we create a .note.GNU-stack section in much the
1039 same way as the assembler does with its --[no]execstack option. */
1040 (void) bfd_make_section_with_flags (link_info.input_bfds,
1042 SEC_READONLY | (link_info.execstack ? SEC_CODE : 0));
1047 if (link_info.eh_frame_hdr
1048 && !link_info.traditional_format)
1050 bfd *abfd, *elfbfd = NULL;
1051 bfd_boolean warn_eh_frame = FALSE;
1054 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1056 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1060 s = bfd_get_section_by_name (abfd, ".eh_frame");
1063 || bfd_is_abs_section (s->output_section)))
1064 s = bfd_get_next_section_by_name (s);
1065 warn_eh_frame = s != NULL;
1067 if (elfbfd && warn_eh_frame)
1072 const struct elf_backend_data *bed;
1074 bed = get_elf_backend_data (elfbfd);
1075 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1076 bed->dynamic_sec_flags
1079 && bfd_set_section_alignment (elfbfd, s, 2))
1081 htab->eh_info.hdr_sec = s;
1082 warn_eh_frame = FALSE;
1086 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1087 " --eh-frame-hdr ignored.\n");
1090 /* Get the list of files which appear in DT_NEEDED entries in
1091 dynamic objects included in the link (often there will be none).
1092 For each such file, we want to track down the corresponding
1093 library, and include the symbol table in the link. This is what
1094 the runtime dynamic linker will do. Tracking the files down here
1095 permits one dynamic object to include another without requiring
1096 special action by the person doing the link. Note that the
1097 needed list can actually grow while we are stepping through this
1099 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1100 for (l = needed; l != NULL; l = l->next)
1102 struct bfd_link_needed_list *ll;
1103 struct dt_needed n, nn;
1106 /* If the lib that needs this one was --as-needed and wasn't
1107 found to be needed, then this lib isn't needed either. */
1109 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1112 /* Skip the lib if --no-copy-dt-needed-entries and
1113 --allow-shlib-undefined is in effect. */
1115 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1116 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1119 /* If we've already seen this file, skip it. */
1120 for (ll = needed; ll != l; ll = ll->next)
1122 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1123 && strcmp (ll->name, l->name) == 0)
1128 /* See if this file was included in the link explicitly. */
1130 global_found = NULL;
1131 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1132 if (global_found != NULL
1133 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1134 & DYN_AS_NEEDED) == 0)
1141 info_msg (_("%s needed by %B\n"), l->name, l->by);
1143 /* As-needed libs specified on the command line (or linker script)
1144 take priority over libs found in search dirs. */
1145 if (global_found != NULL)
1147 nn.name = global_found->filename;
1148 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1152 /* We need to find this file and include the symbol table. We
1153 want to search for the file in the same way that the dynamic
1154 linker will search. That means that we want to use
1155 rpath_link, rpath, then the environment variable
1156 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1157 entries (native only), then the linker script LIB_SEARCH_DIRS.
1158 We do not search using the -L arguments.
1160 We search twice. The first time, we skip objects which may
1161 introduce version mismatches. The second time, we force
1162 their use. See gld${EMULATION_NAME}_vercheck comment. */
1163 for (force = 0; force < 2; force++)
1166 search_dirs_type *search;
1168 if [ "x${NATIVE}" = xyes ] ; then
1170 const char *lib_path;
1173 if [ "x${USE_LIBPATH}" = xyes ] ; then
1175 struct bfd_link_needed_list *rp;
1181 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1185 if [ "x${USE_LIBPATH}" = xyes ] ; then
1187 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1192 if [ "x${NATIVE}" = xyes ] ; then
1194 if (command_line.rpath_link == NULL
1195 && command_line.rpath == NULL)
1197 lib_path = (const char *) getenv ("LD_RUN_PATH");
1198 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1202 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1203 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1207 if [ "x${USE_LIBPATH}" = xyes ] ; then
1210 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1211 for (; !found && rp != NULL; rp = rp->next)
1213 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1214 found = (rp->by == l->by
1215 && gld${EMULATION_NAME}_search_needed (tmpname,
1225 if [ "x${USE_LIBPATH}" = xyes ] ; then
1227 *-*-freebsd* | *-*-dragonfly*)
1229 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1235 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1237 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1246 len = strlen (l->name);
1247 for (search = search_head; search != NULL; search = search->next)
1251 if (search->cmdline)
1253 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1254 sprintf (filename, "%s/%s", search->name, l->name);
1256 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1269 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1279 /* Look through an expression for an assignment statement. */
1282 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1284 bfd_boolean provide = FALSE;
1286 switch (exp->type.node_class)
1289 case etree_provided:
1293 /* We call record_link_assignment even if the symbol is defined.
1294 This is because if it is defined by a dynamic object, we
1295 actually want to use the value defined by the linker script,
1296 not the value from the dynamic object (because we are setting
1297 symbols like etext). If the symbol is defined by a regular
1298 object, then, as it happens, calling record_link_assignment
1300 if (strcmp (exp->assign.dst, ".") != 0)
1302 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1304 exp->assign.dst, provide,
1305 exp->assign.hidden))
1306 einfo ("%P%F: failed to record assignment to %s: %E\n",
1309 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1313 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1314 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1318 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1319 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1320 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1324 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1333 /* This is called by the before_allocation routine via
1334 lang_for_each_statement. It locates any assignment statements, and
1335 tells the ELF backend about them, in case they are assignments to
1336 symbols which are referred to by dynamic objects. */
1339 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1341 if (s->header.type == lang_assignment_statement_enum)
1342 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1347 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1348 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1349 ELF_INTERPRETER_SET_DEFAULT="
1350 if (sinterp != NULL)
1352 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1353 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1358 ELF_INTERPRETER_SET_DEFAULT=
1362 /* used by before_allocation and handle_option. */
1364 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1367 *to = xstrdup (op_arg);
1370 size_t to_len = strlen (*to);
1371 size_t op_arg_len = strlen (op_arg);
1375 /* First see whether OPTARG is already in the path. */
1378 if (strncmp (op_arg, cp, op_arg_len) == 0
1379 && (cp[op_arg_len] == 0
1380 || cp[op_arg_len] == config.rpath_separator))
1384 /* Not yet found. */
1385 cp = strchr (cp, config.rpath_separator);
1393 buf = xmalloc (to_len + op_arg_len + 2);
1394 sprintf (buf, "%s%c%s", *to,
1395 config.rpath_separator, op_arg);
1402 /* This is called after the sections have been attached to output
1403 sections, but before any sizes or addresses have been set. */
1406 gld${EMULATION_NAME}_before_allocation (void)
1411 struct elf_link_hash_entry *ehdr_start = NULL;
1412 struct bfd_link_hash_entry ehdr_start_save = ehdr_start_save;
1414 if (is_elf_hash_table (link_info.hash))
1416 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1418 /* Make __ehdr_start hidden if it has been referenced, to
1419 prevent the symbol from being dynamic. */
1420 if (!link_info.relocatable)
1422 struct elf_link_hash_entry *h
1423 = elf_link_hash_lookup (elf_hash_table (&link_info), "__ehdr_start",
1424 FALSE, FALSE, TRUE);
1426 /* Only adjust the export class if the symbol was referenced
1427 and not defined, otherwise leave it alone. */
1429 && (h->root.type == bfd_link_hash_new
1430 || h->root.type == bfd_link_hash_undefined
1431 || h->root.type == bfd_link_hash_undefweak
1432 || h->root.type == bfd_link_hash_common))
1434 _bfd_elf_link_hash_hide_symbol (&link_info, h, TRUE);
1435 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
1436 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
1437 /* Don't leave the symbol undefined. Undefined hidden
1438 symbols typically won't have dynamic relocations, but
1439 we most likely will need dynamic relocations for
1440 __ehdr_start if we are building a PIE or shared
1443 ehdr_start_save = h->root;
1444 h->root.type = bfd_link_hash_defined;
1445 h->root.u.def.section = bfd_abs_section_ptr;
1446 h->root.u.def.value = 0;
1450 /* If we are going to make any variable assignments, we need to
1451 let the ELF backend know about them in case the variables are
1452 referred to by dynamic objects. */
1453 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1456 /* Let the ELF backend work out the sizes of any sections required
1457 by dynamic linking. */
1458 rpath = command_line.rpath;
1460 rpath = (const char *) getenv ("LD_RUN_PATH");
1462 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1463 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1465 const char *audit_libs = elf_dt_audit (abfd);
1467 /* If the input bfd contains an audit entry, we need to add it as
1468 a dep audit entry. */
1469 if (audit_libs && *audit_libs != '\0')
1471 char *cp = xstrdup (audit_libs);
1475 char *cp2 = strchr (cp, config.rpath_separator);
1483 if (cp != NULL && *cp != '\0')
1484 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1486 cp = more ? ++cp2 : NULL;
1492 if (! (bfd_elf_size_dynamic_sections
1493 (link_info.output_bfd, command_line.soname, rpath,
1494 command_line.filter_shlib, audit, depaudit,
1495 (const char * const *) command_line.auxiliary_filters,
1496 &link_info, &sinterp)))
1497 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1499 ${ELF_INTERPRETER_SET_DEFAULT}
1500 /* Let the user override the dynamic linker we are using. */
1501 if (command_line.interpreter != NULL
1504 sinterp->contents = (bfd_byte *) command_line.interpreter;
1505 sinterp->size = strlen (command_line.interpreter) + 1;
1508 /* Look for any sections named .gnu.warning. As a GNU extensions,
1509 we treat such sections as containing warning messages. We print
1510 out the warning message, and then zero out the section size so
1511 that it does not get copied into the output file. */
1514 LANG_FOR_EACH_INPUT_STATEMENT (is)
1521 if (is->flags.just_syms)
1524 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1529 msg = (char *) xmalloc ((size_t) (sz + 1));
1530 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1532 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1535 ret = link_info.callbacks->warning (&link_info, msg,
1536 (const char *) NULL,
1537 is->the_bfd, (asection *) NULL,
1542 /* Clobber the section size, so that we don't waste space
1543 copying the warning into the output file. If we've already
1544 sized the output section, adjust its size. The adjustment
1545 is on rawsize because targets that size sections early will
1546 have called lang_reset_memory_regions after sizing. */
1547 if (s->output_section != NULL
1548 && s->output_section->rawsize >= s->size)
1549 s->output_section->rawsize -= s->size;
1553 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1554 warning section don't get copied to the output. */
1555 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1559 before_allocation_default ();
1561 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1562 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1564 if (ehdr_start != NULL)
1566 /* If we twiddled __ehdr_start to defined earlier, put it back
1568 ehdr_start->root.type = ehdr_start_save.type;
1569 ehdr_start->root.u = ehdr_start_save.u;
1576 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1579 /* Try to open a dynamic archive. This is where we know that ELF
1580 dynamic libraries have an extension of .so (or .sl on oddball systems
1584 gld${EMULATION_NAME}_open_dynamic_archive
1585 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1587 const char *filename;
1590 bfd_boolean opened = FALSE;
1592 if (! entry->flags.maybe_archive)
1595 filename = entry->filename;
1596 len = strlen (search->name) + strlen (filename);
1597 if (entry->flags.full_name_provided)
1600 string = (char *) xmalloc (len);
1601 sprintf (string, "%s/%s", search->name, filename);
1607 len += strlen (arch) + sizeof "/lib.so";
1608 #ifdef EXTRA_SHLIB_EXTENSION
1609 xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
1610 ? strlen (EXTRA_SHLIB_EXTENSION) - 3
1613 string = (char *) xmalloc (len + xlen);
1614 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1615 #ifdef EXTRA_SHLIB_EXTENSION
1616 /* Try the .so extension first. If that fails build a new filename
1617 using EXTRA_SHLIB_EXTENSION. */
1618 opened = ldfile_try_open_bfd (string, entry);
1620 strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
1624 if (!opened && !ldfile_try_open_bfd (string, entry))
1630 entry->filename = string;
1632 /* We have found a dynamic object to include in the link. The ELF
1633 backend linker will create a DT_NEEDED entry in the .dynamic
1634 section naming this file. If this file includes a DT_SONAME
1635 entry, it will be used. Otherwise, the ELF linker will just use
1636 the name of the file. For an archive found by searching, like
1637 this one, the DT_NEEDED entry should consist of just the name of
1638 the file, without the path information used to find it. Note
1639 that we only need to do this if we have a dynamic object; an
1640 archive will never be referenced by a DT_NEEDED entry.
1642 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1643 very pretty. I haven't been able to think of anything that is
1645 if (bfd_check_format (entry->the_bfd, bfd_object)
1646 && (entry->the_bfd->flags & DYNAMIC) != 0)
1648 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1650 /* Rather than duplicating the logic above. Just use the
1651 filename we recorded earlier. */
1653 if (!entry->flags.full_name_provided)
1654 filename = lbasename (entry->filename);
1655 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1664 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1667 /* A variant of lang_output_section_find used by place_orphan. */
1669 static lang_output_section_statement_type *
1670 output_rel_find (asection *sec, int isdyn)
1672 lang_output_section_statement_type *lookup;
1673 lang_output_section_statement_type *last = NULL;
1674 lang_output_section_statement_type *last_alloc = NULL;
1675 lang_output_section_statement_type *last_ro_alloc = NULL;
1676 lang_output_section_statement_type *last_rel = NULL;
1677 lang_output_section_statement_type *last_rel_alloc = NULL;
1678 int rela = sec->name[4] == 'a';
1680 for (lookup = &lang_output_section_statement.head->output_section_statement;
1682 lookup = lookup->next)
1684 if (lookup->constraint >= 0
1685 && CONST_STRNEQ (lookup->name, ".rel"))
1687 int lookrela = lookup->name[4] == 'a';
1689 /* .rel.dyn must come before all other reloc sections, to suit
1694 /* Don't place after .rel.plt as doing so results in wrong
1696 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1699 if (rela == lookrela || last_rel == NULL)
1701 if ((rela == lookrela || last_rel_alloc == NULL)
1702 && lookup->bfd_section != NULL
1703 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1704 last_rel_alloc = lookup;
1708 if (lookup->bfd_section != NULL
1709 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1711 last_alloc = lookup;
1712 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1713 last_ro_alloc = lookup;
1718 return last_rel_alloc;
1724 return last_ro_alloc;
1732 /* Place an orphan section. We use this to put random SHF_ALLOC
1733 sections in the right segment. */
1735 static lang_output_section_statement_type *
1736 gld${EMULATION_NAME}_place_orphan (asection *s,
1737 const char *secname,
1740 static struct orphan_save hold[] =
1743 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1746 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1749 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
1752 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1758 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1761 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1764 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1770 enum orphan_save_index
1782 static int orphan_init_done = 0;
1783 struct orphan_save *place;
1784 lang_output_section_statement_type *after;
1785 lang_output_section_statement_type *os;
1786 lang_output_section_statement_type *match_by_name = NULL;
1788 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1789 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1791 if (! link_info.relocatable
1792 && link_info.combreloc
1793 && (s->flags & SEC_ALLOC))
1799 secname = ".rela.dyn";
1803 secname = ".rel.dyn";
1809 else if (CONST_STRNEQ (secname, ".rel"))
1811 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1816 /* Look through the script to see where to place this section. */
1817 if (constraint == 0)
1818 for (os = lang_output_section_find (secname);
1820 os = next_matching_output_section_statement (os, 0))
1822 /* If we don't match an existing output section, tell
1823 lang_insert_orphan to create a new output section. */
1824 constraint = SPECIAL;
1826 if (os->bfd_section != NULL
1827 && (os->bfd_section->flags == 0
1828 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1831 && ((s->flags ^ os->bfd_section->flags)
1832 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1834 /* We already have an output section statement with this
1835 name, and its bfd section has compatible flags.
1836 If the section already exists but does not have any flags
1837 set, then it has been created by the linker, probably as a
1838 result of a --section-start command line switch. */
1839 lang_add_section (&os->children, s, NULL, os);
1843 /* Save unused output sections in case we can match them
1844 against orphans later. */
1845 if (os->bfd_section == NULL)
1849 /* If we didn't match an active output section, see if we matched an
1850 unused one and use that. */
1853 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1854 return match_by_name;
1857 if (!orphan_init_done)
1859 struct orphan_save *ho;
1861 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1862 if (ho->name != NULL)
1864 ho->os = lang_output_section_find (ho->name);
1865 if (ho->os != NULL && ho->os->flags == 0)
1866 ho->os->flags = ho->flags;
1868 orphan_init_done = 1;
1871 /* If this is a final link, then always put .gnu.warning.SYMBOL
1872 sections into the .text section to get them out of the way. */
1873 if (link_info.executable
1874 && ! link_info.relocatable
1875 && CONST_STRNEQ (s->name, ".gnu.warning.")
1876 && hold[orphan_text].os != NULL)
1878 os = hold[orphan_text].os;
1879 lang_add_section (&os->children, s, NULL, os);
1883 /* Decide which segment the section should go in based on the
1884 section name and section flags. We put loadable .note sections
1885 right after the .interp section, so that the PT_NOTE segment is
1886 stored right after the program headers where the OS can read it
1887 in the first page. */
1890 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1891 place = &hold[orphan_nonalloc];
1892 else if ((s->flags & SEC_ALLOC) == 0)
1894 else if ((s->flags & SEC_LOAD) != 0
1895 && ((iself && sh_type == SHT_NOTE)
1896 || (!iself && CONST_STRNEQ (secname, ".note"))))
1897 place = &hold[orphan_interp];
1898 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1899 place = &hold[orphan_bss];
1900 else if ((s->flags & SEC_SMALL_DATA) != 0)
1901 place = &hold[orphan_sdata];
1902 else if ((s->flags & SEC_THREAD_LOCAL) != 0)
1903 place = &hold[orphan_tdata];
1904 else if ((s->flags & SEC_READONLY) == 0)
1905 place = &hold[orphan_data];
1906 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1907 || (!iself && CONST_STRNEQ (secname, ".rel")))
1908 && (s->flags & SEC_LOAD) != 0)
1909 place = &hold[orphan_rel];
1910 else if ((s->flags & SEC_CODE) == 0)
1911 place = &hold[orphan_rodata];
1913 place = &hold[orphan_text];
1918 if (place->os == NULL)
1920 if (place->name != NULL)
1921 place->os = lang_output_section_find (place->name);
1923 place->os = output_rel_find (s, isdyn);
1927 after = lang_output_section_find_by_flags
1928 (s, &place->os, _bfd_elf_match_sections_by_type);
1930 /* *ABS* is always the first output section statement. */
1931 after = &lang_output_section_statement.head->output_section_statement;
1934 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1939 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1943 gld${EMULATION_NAME}_after_allocation (void)
1945 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1947 gld${EMULATION_NAME}_map_segments (need_layout);
1952 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1956 gld${EMULATION_NAME}_get_script (int *isfile)
1959 if test x"$COMPILE_IN" = xyes
1961 # Scripts compiled in.
1963 # sed commands to quote an ld script as a C string.
1964 sc="-f stringify.sed"
1970 if (link_info.relocatable && config.build_constructors)
1973 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1974 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1975 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1976 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1977 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1978 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1979 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1980 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1982 if test -n "$GENERATE_PIE_SCRIPT" ; then
1983 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1984 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
1985 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1986 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1987 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
1988 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1989 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
1991 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
1992 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
1994 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1995 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1996 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
1997 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1998 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1999 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2000 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2001 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2003 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2004 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2006 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2007 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2008 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2009 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2010 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2011 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2013 echo ' ; else return' >> e${EMULATION_NAME}.c
2014 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2015 echo '; }' >> e${EMULATION_NAME}.c
2018 # Scripts read from the filesystem.
2024 if (link_info.relocatable && config.build_constructors)
2025 return "ldscripts/${EMULATION_NAME}.xu";
2026 else if (link_info.relocatable)
2027 return "ldscripts/${EMULATION_NAME}.xr";
2028 else if (!config.text_read_only)
2029 return "ldscripts/${EMULATION_NAME}.xbn";
2031 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2034 else if (!config.magic_demand_paged)
2035 return "ldscripts/${EMULATION_NAME}.xn";
2038 if test -n "$GENERATE_PIE_SCRIPT" ; then
2039 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2041 else if (link_info.pie && link_info.combreloc
2042 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2043 return "ldscripts/${EMULATION_NAME}.xdw";
2044 else if (link_info.pie && link_info.combreloc)
2045 return "ldscripts/${EMULATION_NAME}.xdc";
2049 else if (link_info.pie)
2050 return "ldscripts/${EMULATION_NAME}.xd";
2053 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2054 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2056 else if (link_info.shared && link_info.combreloc
2057 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2058 return "ldscripts/${EMULATION_NAME}.xsw";
2059 else if (link_info.shared && link_info.combreloc)
2060 return "ldscripts/${EMULATION_NAME}.xsc";
2064 else if (link_info.shared)
2065 return "ldscripts/${EMULATION_NAME}.xs";
2068 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2070 else if (link_info.combreloc && link_info.relro
2071 && (link_info.flags & DF_BIND_NOW))
2072 return "ldscripts/${EMULATION_NAME}.xw";
2073 else if (link_info.combreloc)
2074 return "ldscripts/${EMULATION_NAME}.xc";
2079 return "ldscripts/${EMULATION_NAME}.x";
2086 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2088 $PARSE_AND_LIST_PROLOGUE
2094 #define OPTION_DISABLE_NEW_DTAGS (400)
2095 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2096 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2097 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2098 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2099 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2100 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2101 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2104 gld${EMULATION_NAME}_add_options
2105 (int ns, char **shortopts, int nl, struct option **longopts,
2106 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2109 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2111 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2115 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2119 static const struct option xtra_long[] = {
2121 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2123 {"audit", required_argument, NULL, OPTION_AUDIT},
2124 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2128 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2130 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2132 {"depaudit", required_argument, NULL, 'P'},
2133 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2134 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2135 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2136 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2137 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2140 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2142 $PARSE_AND_LIST_LONGOPTS
2146 {NULL, no_argument, NULL, 0}
2149 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2150 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2151 *longopts = (struct option *)
2152 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2153 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2156 #define DEFAULT_BUILD_ID_STYLE "sha1"
2159 gld${EMULATION_NAME}_handle_option (int optc)
2166 case OPTION_BUILD_ID:
2167 if (emit_note_gnu_build_id != NULL)
2169 free ((char *) emit_note_gnu_build_id);
2170 emit_note_gnu_build_id = NULL;
2173 optarg = DEFAULT_BUILD_ID_STYLE;
2174 if (strcmp (optarg, "none"))
2175 emit_note_gnu_build_id = xstrdup (optarg);
2180 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2183 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2187 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2190 case OPTION_DISABLE_NEW_DTAGS:
2191 link_info.new_dtags = FALSE;
2194 case OPTION_ENABLE_NEW_DTAGS:
2195 link_info.new_dtags = TRUE;
2198 case OPTION_EH_FRAME_HDR:
2199 link_info.eh_frame_hdr = TRUE;
2203 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2204 /* Groups must be self-contained. */
2205 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2206 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2209 case OPTION_EXCLUDE_LIBS:
2210 add_excluded_libs (optarg);
2213 case OPTION_HASH_STYLE:
2214 link_info.emit_hash = FALSE;
2215 link_info.emit_gnu_hash = FALSE;
2216 if (strcmp (optarg, "sysv") == 0)
2217 link_info.emit_hash = TRUE;
2218 else if (strcmp (optarg, "gnu") == 0)
2219 link_info.emit_gnu_hash = TRUE;
2220 else if (strcmp (optarg, "both") == 0)
2222 link_info.emit_hash = TRUE;
2223 link_info.emit_gnu_hash = TRUE;
2226 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2233 if (strcmp (optarg, "defs") == 0)
2234 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2235 else if (strcmp (optarg, "muldefs") == 0)
2236 link_info.allow_multiple_definition = TRUE;
2237 else if (CONST_STRNEQ (optarg, "max-page-size="))
2241 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2242 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2243 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2246 else if (CONST_STRNEQ (optarg, "common-page-size="))
2249 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2251 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2252 einfo (_("%P%F: invalid common page size \`%s'\n"),
2255 else if (CONST_STRNEQ (optarg, "stack-size="))
2258 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2259 if (*end || link_info.stacksize < 0)
2260 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2261 if (!link_info.stacksize)
2262 /* Use -1 for explicit no-stack, because zero means
2264 link_info.stacksize = -1;
2266 else if (strcmp (optarg, "execstack") == 0)
2268 link_info.execstack = TRUE;
2269 link_info.noexecstack = FALSE;
2271 else if (strcmp (optarg, "noexecstack") == 0)
2273 link_info.noexecstack = TRUE;
2274 link_info.execstack = FALSE;
2277 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2279 else if (strcmp (optarg, "global") == 0)
2280 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2281 else if (strcmp (optarg, "initfirst") == 0)
2282 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2283 else if (strcmp (optarg, "interpose") == 0)
2284 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2285 else if (strcmp (optarg, "loadfltr") == 0)
2286 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2287 else if (strcmp (optarg, "nodefaultlib") == 0)
2288 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2289 else if (strcmp (optarg, "nodelete") == 0)
2290 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2291 else if (strcmp (optarg, "nodlopen") == 0)
2292 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2293 else if (strcmp (optarg, "nodump") == 0)
2294 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2295 else if (strcmp (optarg, "now") == 0)
2297 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2298 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2300 else if (strcmp (optarg, "lazy") == 0)
2302 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2303 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2305 else if (strcmp (optarg, "origin") == 0)
2307 link_info.flags |= (bfd_vma) DF_ORIGIN;
2308 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2310 else if (strcmp (optarg, "combreloc") == 0)
2311 link_info.combreloc = TRUE;
2312 else if (strcmp (optarg, "nocombreloc") == 0)
2313 link_info.combreloc = FALSE;
2314 else if (strcmp (optarg, "nocopyreloc") == 0)
2315 link_info.nocopyreloc = TRUE;
2316 else if (strcmp (optarg, "relro") == 0)
2317 link_info.relro = TRUE;
2318 else if (strcmp (optarg, "norelro") == 0)
2319 link_info.relro = FALSE;
2320 else if (strcmp (optarg, "text") == 0)
2321 link_info.error_textrel = TRUE;
2322 else if (strcmp (optarg, "notext") == 0)
2323 link_info.error_textrel = FALSE;
2324 else if (strcmp (optarg, "textoff") == 0)
2325 link_info.error_textrel = FALSE;
2331 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2335 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2337 $PARSE_AND_LIST_ARGS_CASES
2349 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2353 gld${EMULATION_NAME}_list_options (FILE * file)
2356 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2359 --audit=AUDITLIB Specify a library to use for auditing\n"));
2361 -Bgroup Selects group name lookup rules for DSO\n"));
2366 --build-id[=STYLE] Generate build ID note\n"));
2368 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2371 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2372 Specify a library to use for auditing dependencies\n"));
2374 --disable-new-dtags Disable new dynamic tags\n"));
2376 --enable-new-dtags Enable new dynamic tags\n"));
2378 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2380 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2382 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2384 -z combreloc Merge dynamic relocs into one section and sort\n"));
2390 -z common-page-size=SIZE Set common page size to SIZE\n"));
2392 -z defs Report unresolved symbols in object files.\n"));
2394 -z execstack Mark executable as requiring executable stack\n"));
2397 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2400 -z global Make symbols in DSO available for subsequently\n\
2401 loaded objects\n"));
2403 -z initfirst Mark DSO to be initialized first at runtime\n"));
2405 -z interpose Mark object to interpose all DSOs but executable\n"));
2407 -z lazy Mark object lazy runtime binding (default)\n"));
2409 -z loadfltr Mark object requiring immediate process\n"));
2415 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2417 -z muldefs Allow multiple definitions\n"));
2420 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2423 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2425 -z nocopyreloc Don't create copy relocs\n"));
2427 -z nodefaultlib Mark object not to use default search paths\n"));
2429 -z nodelete Mark DSO non-deletable at runtime\n"));
2431 -z nodlopen Mark DSO not available to dlopen\n"));
2433 -z nodump Mark DSO not available to dldump\n"));
2438 -z noexecstack Mark executable as not requiring executable stack\n"));
2440 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2443 -z norelro Don't create RELRO program header\n"));
2445 -z now Mark object non-lazy runtime binding\n"));
2447 -z origin Mark object requiring immediate \$ORIGIN\n\
2448 processing at runtime\n"));
2450 -z relro Create RELRO program header\n"));
2452 -z stacksize=SIZE Set size of stack segment\n"));
2456 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2458 $PARSE_AND_LIST_OPTIONS
2466 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2468 $PARSE_AND_LIST_EPILOGUE
2475 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2477 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2478 ${LDEMUL_SYSLIB-syslib_default},
2479 ${LDEMUL_HLL-hll_default},
2480 ${LDEMUL_AFTER_PARSE-after_parse_default},
2481 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2482 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2483 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2484 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2485 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2486 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2487 "${EMULATION_NAME}",
2489 ${LDEMUL_FINISH-finish_default},
2490 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2491 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2492 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2493 ${LDEMUL_SET_SYMBOLS-NULL},
2494 ${LDEMUL_PARSE_ARGS-NULL},
2495 gld${EMULATION_NAME}_add_options,
2496 gld${EMULATION_NAME}_handle_option,
2497 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2498 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2499 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2500 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2501 ${LDEMUL_NEW_VERS_PATTERN-NULL}