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 ${EMULATION_NAME}
15 Copyright (C) 1991-2015 Free Software Foundation, Inc.
16 Written by Steve Chamberlain <sac@cygnus.com>
17 ELF support by Ian Lance Taylor <ian@cygnus.com>
19 This file is part of the GNU Binutils.
21 This program is free software; you can redistribute it and/or modify
22 it under the terms of the GNU General Public License as published by
23 the Free Software Foundation; either version 3 of the License, or
24 (at your option) any later version.
26 This program is distributed in the hope that it will be useful,
27 but WITHOUT ANY WARRANTY; without even the implied warranty of
28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 GNU General Public License for more details.
31 You should have received a copy of the GNU General Public License
32 along with this program; if not, write to the Free Software
33 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
34 MA 02110-1301, USA. */
36 #define TARGET_IS_${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
1019 && bfd_count_sections (abfd) != 0)
1022 /* PR 10555: If there are no ELF input files do not try to
1023 create a .note.gnu-build-id section. */
1025 || !setup_build_id (abfd))
1027 free ((char *) emit_note_gnu_build_id);
1028 emit_note_gnu_build_id = NULL;
1032 if (link_info.relocatable)
1034 if (link_info.execstack == ! link_info.noexecstack)
1035 /* PR ld/16744: If "-z [no]execstack" has been specified on the
1036 command line and we are perfoming a relocatable link then no
1037 PT_GNU_STACK segment will be created and so the
1038 linkinfo.[no]execstack values set in _handle_option() will have no
1039 effect. Instead we create a .note.GNU-stack section in much the
1040 same way as the assembler does with its --[no]execstack option. */
1041 (void) bfd_make_section_with_flags (link_info.input_bfds,
1043 SEC_READONLY | (link_info.execstack ? SEC_CODE : 0));
1048 if (link_info.eh_frame_hdr
1049 && !link_info.traditional_format)
1051 bfd *abfd, *elfbfd = NULL;
1052 bfd_boolean warn_eh_frame = FALSE;
1055 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1057 if (bfd_count_sections (abfd) == 0)
1059 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1063 s = bfd_get_section_by_name (abfd, ".eh_frame");
1066 || bfd_is_abs_section (s->output_section)))
1067 s = bfd_get_next_section_by_name (s);
1068 warn_eh_frame = s != NULL;
1070 if (elfbfd && warn_eh_frame)
1075 const struct elf_backend_data *bed;
1077 bed = get_elf_backend_data (elfbfd);
1078 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1079 bed->dynamic_sec_flags
1082 && bfd_set_section_alignment (elfbfd, s, 2))
1084 htab->eh_info.hdr_sec = s;
1085 warn_eh_frame = FALSE;
1089 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1090 " --eh-frame-hdr ignored.\n");
1093 /* Get the list of files which appear in DT_NEEDED entries in
1094 dynamic objects included in the link (often there will be none).
1095 For each such file, we want to track down the corresponding
1096 library, and include the symbol table in the link. This is what
1097 the runtime dynamic linker will do. Tracking the files down here
1098 permits one dynamic object to include another without requiring
1099 special action by the person doing the link. Note that the
1100 needed list can actually grow while we are stepping through this
1102 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1103 for (l = needed; l != NULL; l = l->next)
1105 struct bfd_link_needed_list *ll;
1106 struct dt_needed n, nn;
1109 /* If the lib that needs this one was --as-needed and wasn't
1110 found to be needed, then this lib isn't needed either. */
1112 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1115 /* Skip the lib if --no-copy-dt-needed-entries and
1116 --allow-shlib-undefined is in effect. */
1118 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1119 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1122 /* If we've already seen this file, skip it. */
1123 for (ll = needed; ll != l; ll = ll->next)
1125 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1126 && strcmp (ll->name, l->name) == 0)
1131 /* See if this file was included in the link explicitly. */
1133 global_found = NULL;
1134 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1135 if (global_found != NULL
1136 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1137 & DYN_AS_NEEDED) == 0)
1144 info_msg (_("%s needed by %B\n"), l->name, l->by);
1146 /* As-needed libs specified on the command line (or linker script)
1147 take priority over libs found in search dirs. */
1148 if (global_found != NULL)
1150 nn.name = global_found->filename;
1151 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1155 /* We need to find this file and include the symbol table. We
1156 want to search for the file in the same way that the dynamic
1157 linker will search. That means that we want to use
1158 rpath_link, rpath, then the environment variable
1159 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1160 entries (native only), then the linker script LIB_SEARCH_DIRS.
1161 We do not search using the -L arguments.
1163 We search twice. The first time, we skip objects which may
1164 introduce version mismatches. The second time, we force
1165 their use. See gld${EMULATION_NAME}_vercheck comment. */
1166 for (force = 0; force < 2; force++)
1169 search_dirs_type *search;
1171 if [ "x${NATIVE}" = xyes ] ; then
1173 const char *lib_path;
1176 if [ "x${USE_LIBPATH}" = xyes ] ; then
1178 struct bfd_link_needed_list *rp;
1184 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1188 if [ "x${USE_LIBPATH}" = xyes ] ; then
1190 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1195 if [ "x${NATIVE}" = xyes ] ; then
1197 if (command_line.rpath_link == NULL
1198 && command_line.rpath == NULL)
1200 lib_path = (const char *) getenv ("LD_RUN_PATH");
1201 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1205 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1206 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1210 if [ "x${USE_LIBPATH}" = xyes ] ; then
1213 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1214 for (; !found && rp != NULL; rp = rp->next)
1216 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1217 found = (rp->by == l->by
1218 && gld${EMULATION_NAME}_search_needed (tmpname,
1228 if [ "x${USE_LIBPATH}" = xyes ] ; then
1230 *-*-freebsd* | *-*-dragonfly*)
1232 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1238 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1240 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1249 len = strlen (l->name);
1250 for (search = search_head; search != NULL; search = search->next)
1254 if (search->cmdline)
1256 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1257 sprintf (filename, "%s/%s", search->name, l->name);
1259 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1272 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1282 /* Look through an expression for an assignment statement. */
1285 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1287 bfd_boolean provide = FALSE;
1289 switch (exp->type.node_class)
1292 case etree_provided:
1296 /* We call record_link_assignment even if the symbol is defined.
1297 This is because if it is defined by a dynamic object, we
1298 actually want to use the value defined by the linker script,
1299 not the value from the dynamic object (because we are setting
1300 symbols like etext). If the symbol is defined by a regular
1301 object, then, as it happens, calling record_link_assignment
1303 if (strcmp (exp->assign.dst, ".") != 0)
1305 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1307 exp->assign.dst, provide,
1308 exp->assign.hidden))
1309 einfo ("%P%F: failed to record assignment to %s: %E\n",
1312 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1316 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1317 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1321 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1322 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1323 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1327 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1336 /* This is called by the before_allocation routine via
1337 lang_for_each_statement. It locates any assignment statements, and
1338 tells the ELF backend about them, in case they are assignments to
1339 symbols which are referred to by dynamic objects. */
1342 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1344 if (s->header.type == lang_assignment_statement_enum)
1345 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1350 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1351 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1352 ELF_INTERPRETER_SET_DEFAULT="
1353 if (sinterp != NULL)
1355 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1356 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1361 ELF_INTERPRETER_SET_DEFAULT=
1365 /* used by before_allocation and handle_option. */
1367 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1370 *to = xstrdup (op_arg);
1373 size_t to_len = strlen (*to);
1374 size_t op_arg_len = strlen (op_arg);
1378 /* First see whether OPTARG is already in the path. */
1381 if (strncmp (op_arg, cp, op_arg_len) == 0
1382 && (cp[op_arg_len] == 0
1383 || cp[op_arg_len] == config.rpath_separator))
1387 /* Not yet found. */
1388 cp = strchr (cp, config.rpath_separator);
1396 buf = xmalloc (to_len + op_arg_len + 2);
1397 sprintf (buf, "%s%c%s", *to,
1398 config.rpath_separator, op_arg);
1405 /* This is called after the sections have been attached to output
1406 sections, but before any sizes or addresses have been set. */
1409 gld${EMULATION_NAME}_before_allocation (void)
1414 struct elf_link_hash_entry *ehdr_start = NULL;
1415 struct bfd_link_hash_entry ehdr_start_save = {};
1417 if (is_elf_hash_table (link_info.hash))
1419 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1421 /* Make __ehdr_start hidden if it has been referenced, to
1422 prevent the symbol from being dynamic. */
1423 if (!link_info.relocatable)
1425 struct elf_link_hash_entry *h
1426 = elf_link_hash_lookup (elf_hash_table (&link_info), "__ehdr_start",
1427 FALSE, FALSE, TRUE);
1429 /* Only adjust the export class if the symbol was referenced
1430 and not defined, otherwise leave it alone. */
1432 && (h->root.type == bfd_link_hash_new
1433 || h->root.type == bfd_link_hash_undefined
1434 || h->root.type == bfd_link_hash_undefweak
1435 || h->root.type == bfd_link_hash_common))
1437 _bfd_elf_link_hash_hide_symbol (&link_info, h, TRUE);
1438 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
1439 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
1440 /* Don't leave the symbol undefined. Undefined hidden
1441 symbols typically won't have dynamic relocations, but
1442 we most likely will need dynamic relocations for
1443 __ehdr_start if we are building a PIE or shared
1446 ehdr_start_save = h->root;
1447 h->root.type = bfd_link_hash_defined;
1448 h->root.u.def.section = bfd_abs_section_ptr;
1449 h->root.u.def.value = 0;
1453 /* If we are going to make any variable assignments, we need to
1454 let the ELF backend know about them in case the variables are
1455 referred to by dynamic objects. */
1456 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1459 /* Let the ELF backend work out the sizes of any sections required
1460 by dynamic linking. */
1461 rpath = command_line.rpath;
1463 rpath = (const char *) getenv ("LD_RUN_PATH");
1465 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1466 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1468 const char *audit_libs = elf_dt_audit (abfd);
1470 /* If the input bfd contains an audit entry, we need to add it as
1471 a dep audit entry. */
1472 if (audit_libs && *audit_libs != '\0')
1474 char *cp = xstrdup (audit_libs);
1478 char *cp2 = strchr (cp, config.rpath_separator);
1486 if (cp != NULL && *cp != '\0')
1487 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1489 cp = more ? ++cp2 : NULL;
1495 if (! (bfd_elf_size_dynamic_sections
1496 (link_info.output_bfd, command_line.soname, rpath,
1497 command_line.filter_shlib, audit, depaudit,
1498 (const char * const *) command_line.auxiliary_filters,
1499 &link_info, &sinterp)))
1500 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1502 ${ELF_INTERPRETER_SET_DEFAULT}
1503 /* Let the user override the dynamic linker we are using. */
1504 if (command_line.interpreter != NULL
1507 sinterp->contents = (bfd_byte *) command_line.interpreter;
1508 sinterp->size = strlen (command_line.interpreter) + 1;
1511 /* Look for any sections named .gnu.warning. As a GNU extensions,
1512 we treat such sections as containing warning messages. We print
1513 out the warning message, and then zero out the section size so
1514 that it does not get copied into the output file. */
1517 LANG_FOR_EACH_INPUT_STATEMENT (is)
1524 if (is->flags.just_syms)
1527 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1532 msg = (char *) xmalloc ((size_t) (sz + 1));
1533 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1535 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1538 ret = link_info.callbacks->warning (&link_info, msg,
1539 (const char *) NULL,
1540 is->the_bfd, (asection *) NULL,
1545 /* Clobber the section size, so that we don't waste space
1546 copying the warning into the output file. If we've already
1547 sized the output section, adjust its size. The adjustment
1548 is on rawsize because targets that size sections early will
1549 have called lang_reset_memory_regions after sizing. */
1550 if (s->output_section != NULL
1551 && s->output_section->rawsize >= s->size)
1552 s->output_section->rawsize -= s->size;
1556 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1557 warning section don't get copied to the output. */
1558 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1562 before_allocation_default ();
1564 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1565 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1567 if (ehdr_start != NULL)
1569 /* If we twiddled __ehdr_start to defined earlier, put it back
1571 ehdr_start->root.type = ehdr_start_save.type;
1572 ehdr_start->root.u = ehdr_start_save.u;
1579 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1582 /* Try to open a dynamic archive. This is where we know that ELF
1583 dynamic libraries have an extension of .so (or .sl on oddball systems
1587 gld${EMULATION_NAME}_open_dynamic_archive
1588 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1590 const char *filename;
1593 bfd_boolean opened = FALSE;
1595 if (! entry->flags.maybe_archive)
1598 filename = entry->filename;
1599 len = strlen (search->name) + strlen (filename);
1600 if (entry->flags.full_name_provided)
1603 string = (char *) xmalloc (len);
1604 sprintf (string, "%s/%s", search->name, filename);
1610 len += strlen (arch) + sizeof "/lib.so";
1611 #ifdef EXTRA_SHLIB_EXTENSION
1612 xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
1613 ? strlen (EXTRA_SHLIB_EXTENSION) - 3
1616 string = (char *) xmalloc (len + xlen);
1617 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1618 #ifdef EXTRA_SHLIB_EXTENSION
1619 /* Try the .so extension first. If that fails build a new filename
1620 using EXTRA_SHLIB_EXTENSION. */
1621 opened = ldfile_try_open_bfd (string, entry);
1623 strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
1627 if (!opened && !ldfile_try_open_bfd (string, entry))
1633 entry->filename = string;
1635 /* We have found a dynamic object to include in the link. The ELF
1636 backend linker will create a DT_NEEDED entry in the .dynamic
1637 section naming this file. If this file includes a DT_SONAME
1638 entry, it will be used. Otherwise, the ELF linker will just use
1639 the name of the file. For an archive found by searching, like
1640 this one, the DT_NEEDED entry should consist of just the name of
1641 the file, without the path information used to find it. Note
1642 that we only need to do this if we have a dynamic object; an
1643 archive will never be referenced by a DT_NEEDED entry.
1645 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1646 very pretty. I haven't been able to think of anything that is
1648 if (bfd_check_format (entry->the_bfd, bfd_object)
1649 && (entry->the_bfd->flags & DYNAMIC) != 0)
1651 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1653 /* Rather than duplicating the logic above. Just use the
1654 filename we recorded earlier. */
1656 if (!entry->flags.full_name_provided)
1657 filename = lbasename (entry->filename);
1658 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1667 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1670 /* A variant of lang_output_section_find used by place_orphan. */
1672 static lang_output_section_statement_type *
1673 output_rel_find (asection *sec, int isdyn)
1675 lang_output_section_statement_type *lookup;
1676 lang_output_section_statement_type *last = NULL;
1677 lang_output_section_statement_type *last_alloc = NULL;
1678 lang_output_section_statement_type *last_ro_alloc = NULL;
1679 lang_output_section_statement_type *last_rel = NULL;
1680 lang_output_section_statement_type *last_rel_alloc = NULL;
1681 int rela = sec->name[4] == 'a';
1683 for (lookup = &lang_output_section_statement.head->output_section_statement;
1685 lookup = lookup->next)
1687 if (lookup->constraint >= 0
1688 && CONST_STRNEQ (lookup->name, ".rel"))
1690 int lookrela = lookup->name[4] == 'a';
1692 /* .rel.dyn must come before all other reloc sections, to suit
1697 /* Don't place after .rel.plt as doing so results in wrong
1699 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1702 if (rela == lookrela || last_rel == NULL)
1704 if ((rela == lookrela || last_rel_alloc == NULL)
1705 && lookup->bfd_section != NULL
1706 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1707 last_rel_alloc = lookup;
1711 if (lookup->bfd_section != NULL
1712 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1714 last_alloc = lookup;
1715 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1716 last_ro_alloc = lookup;
1721 return last_rel_alloc;
1727 return last_ro_alloc;
1735 /* Place an orphan section. We use this to put random SHF_ALLOC
1736 sections in the right segment. */
1738 static lang_output_section_statement_type *
1739 gld${EMULATION_NAME}_place_orphan (asection *s,
1740 const char *secname,
1743 static struct orphan_save hold[] =
1746 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1749 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1752 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
1755 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1761 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1764 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1767 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1773 enum orphan_save_index
1785 static int orphan_init_done = 0;
1786 struct orphan_save *place;
1787 lang_output_section_statement_type *after;
1788 lang_output_section_statement_type *os;
1789 lang_output_section_statement_type *match_by_name = NULL;
1791 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1792 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1794 if (! link_info.relocatable
1795 && link_info.combreloc
1796 && (s->flags & SEC_ALLOC))
1802 secname = ".rela.dyn";
1806 secname = ".rel.dyn";
1812 else if (CONST_STRNEQ (secname, ".rel"))
1814 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1819 /* Look through the script to see where to place this section. */
1820 if (constraint == 0)
1821 for (os = lang_output_section_find (secname);
1823 os = next_matching_output_section_statement (os, 0))
1825 /* If we don't match an existing output section, tell
1826 lang_insert_orphan to create a new output section. */
1827 constraint = SPECIAL;
1829 if (os->bfd_section != NULL
1830 && (os->bfd_section->flags == 0
1831 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1834 && ((s->flags ^ os->bfd_section->flags)
1835 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1837 /* We already have an output section statement with this
1838 name, and its bfd section has compatible flags.
1839 If the section already exists but does not have any flags
1840 set, then it has been created by the linker, probably as a
1841 result of a --section-start command line switch. */
1842 lang_add_section (&os->children, s, NULL, os);
1846 /* Save unused output sections in case we can match them
1847 against orphans later. */
1848 if (os->bfd_section == NULL)
1852 /* If we didn't match an active output section, see if we matched an
1853 unused one and use that. */
1856 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1857 return match_by_name;
1860 if (!orphan_init_done)
1862 struct orphan_save *ho;
1864 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1865 if (ho->name != NULL)
1867 ho->os = lang_output_section_find (ho->name);
1868 if (ho->os != NULL && ho->os->flags == 0)
1869 ho->os->flags = ho->flags;
1871 orphan_init_done = 1;
1874 /* If this is a final link, then always put .gnu.warning.SYMBOL
1875 sections into the .text section to get them out of the way. */
1876 if (link_info.executable
1877 && ! link_info.relocatable
1878 && CONST_STRNEQ (s->name, ".gnu.warning.")
1879 && hold[orphan_text].os != NULL)
1881 os = hold[orphan_text].os;
1882 lang_add_section (&os->children, s, NULL, os);
1886 /* Decide which segment the section should go in based on the
1887 section name and section flags. We put loadable .note sections
1888 right after the .interp section, so that the PT_NOTE segment is
1889 stored right after the program headers where the OS can read it
1890 in the first page. */
1893 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1894 place = &hold[orphan_nonalloc];
1895 else if ((s->flags & SEC_ALLOC) == 0)
1897 else if ((s->flags & SEC_LOAD) != 0
1898 && ((iself && sh_type == SHT_NOTE)
1899 || (!iself && CONST_STRNEQ (secname, ".note"))))
1900 place = &hold[orphan_interp];
1901 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1902 place = &hold[orphan_bss];
1903 else if ((s->flags & SEC_SMALL_DATA) != 0)
1904 place = &hold[orphan_sdata];
1905 else if ((s->flags & SEC_THREAD_LOCAL) != 0)
1906 place = &hold[orphan_tdata];
1907 else if ((s->flags & SEC_READONLY) == 0)
1908 place = &hold[orphan_data];
1909 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1910 || (!iself && CONST_STRNEQ (secname, ".rel")))
1911 && (s->flags & SEC_LOAD) != 0)
1912 place = &hold[orphan_rel];
1913 else if ((s->flags & SEC_CODE) == 0)
1914 place = &hold[orphan_rodata];
1916 place = &hold[orphan_text];
1921 if (place->os == NULL)
1923 if (place->name != NULL)
1924 place->os = lang_output_section_find (place->name);
1926 place->os = output_rel_find (s, isdyn);
1930 after = lang_output_section_find_by_flags
1931 (s, &place->os, _bfd_elf_match_sections_by_type);
1933 /* *ABS* is always the first output section statement. */
1934 after = &lang_output_section_statement.head->output_section_statement;
1937 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1942 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1946 gld${EMULATION_NAME}_after_allocation (void)
1948 int need_layout = bfd_elf_discard_info (link_info.output_bfd, &link_info);
1950 if (need_layout < 0)
1951 einfo ("%X%P: .eh_frame/.stab edit: %E\n");
1953 gld${EMULATION_NAME}_map_segments (need_layout);
1958 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1962 gld${EMULATION_NAME}_get_script (int *isfile)
1965 if test x"$COMPILE_IN" = xyes
1967 # Scripts compiled in.
1969 # sed commands to quote an ld script as a C string.
1970 sc="-f stringify.sed"
1976 if (link_info.relocatable && config.build_constructors)
1979 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1980 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1981 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1982 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1983 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1984 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1985 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1986 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1988 if test -n "$GENERATE_PIE_SCRIPT" ; then
1989 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1990 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
1991 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1992 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1993 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
1994 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1995 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
1997 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
1998 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2000 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2001 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2002 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2003 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2004 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2005 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2006 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2007 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2009 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2010 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2012 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2013 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2014 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2015 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2016 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2017 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2019 echo ' ; else return' >> e${EMULATION_NAME}.c
2020 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2021 echo '; }' >> e${EMULATION_NAME}.c
2024 # Scripts read from the filesystem.
2030 if (link_info.relocatable && config.build_constructors)
2031 return "ldscripts/${EMULATION_NAME}.xu";
2032 else if (link_info.relocatable)
2033 return "ldscripts/${EMULATION_NAME}.xr";
2034 else if (!config.text_read_only)
2035 return "ldscripts/${EMULATION_NAME}.xbn";
2037 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2040 else if (!config.magic_demand_paged)
2041 return "ldscripts/${EMULATION_NAME}.xn";
2044 if test -n "$GENERATE_PIE_SCRIPT" ; then
2045 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2047 else if (link_info.pie && link_info.combreloc
2048 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2049 return "ldscripts/${EMULATION_NAME}.xdw";
2050 else if (link_info.pie && link_info.combreloc)
2051 return "ldscripts/${EMULATION_NAME}.xdc";
2055 else if (link_info.pie)
2056 return "ldscripts/${EMULATION_NAME}.xd";
2059 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2060 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2062 else if (link_info.shared && link_info.combreloc
2063 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2064 return "ldscripts/${EMULATION_NAME}.xsw";
2065 else if (link_info.shared && link_info.combreloc)
2066 return "ldscripts/${EMULATION_NAME}.xsc";
2070 else if (link_info.shared)
2071 return "ldscripts/${EMULATION_NAME}.xs";
2074 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2076 else if (link_info.combreloc && link_info.relro
2077 && (link_info.flags & DF_BIND_NOW))
2078 return "ldscripts/${EMULATION_NAME}.xw";
2079 else if (link_info.combreloc)
2080 return "ldscripts/${EMULATION_NAME}.xc";
2085 return "ldscripts/${EMULATION_NAME}.x";
2092 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2094 $PARSE_AND_LIST_PROLOGUE
2100 #define OPTION_DISABLE_NEW_DTAGS (400)
2101 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2102 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2103 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2104 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2105 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2106 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2107 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2110 gld${EMULATION_NAME}_add_options
2111 (int ns, char **shortopts, int nl, struct option **longopts,
2112 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2115 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2117 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2121 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2125 static const struct option xtra_long[] = {
2127 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2129 {"audit", required_argument, NULL, OPTION_AUDIT},
2130 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2134 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2136 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2138 {"depaudit", required_argument, NULL, 'P'},
2139 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2140 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2141 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2142 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2143 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2146 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2148 $PARSE_AND_LIST_LONGOPTS
2152 {NULL, no_argument, NULL, 0}
2155 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2156 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2157 *longopts = (struct option *)
2158 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2159 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2162 #define DEFAULT_BUILD_ID_STYLE "sha1"
2165 gld${EMULATION_NAME}_handle_option (int optc)
2172 case OPTION_BUILD_ID:
2173 if (emit_note_gnu_build_id != NULL)
2175 free ((char *) emit_note_gnu_build_id);
2176 emit_note_gnu_build_id = NULL;
2179 optarg = DEFAULT_BUILD_ID_STYLE;
2180 if (strcmp (optarg, "none"))
2181 emit_note_gnu_build_id = xstrdup (optarg);
2186 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2189 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2193 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2196 case OPTION_DISABLE_NEW_DTAGS:
2197 link_info.new_dtags = FALSE;
2200 case OPTION_ENABLE_NEW_DTAGS:
2201 link_info.new_dtags = TRUE;
2204 case OPTION_EH_FRAME_HDR:
2205 link_info.eh_frame_hdr = TRUE;
2209 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2210 /* Groups must be self-contained. */
2211 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2212 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2215 case OPTION_EXCLUDE_LIBS:
2216 add_excluded_libs (optarg);
2219 case OPTION_HASH_STYLE:
2220 link_info.emit_hash = FALSE;
2221 link_info.emit_gnu_hash = FALSE;
2222 if (strcmp (optarg, "sysv") == 0)
2223 link_info.emit_hash = TRUE;
2224 else if (strcmp (optarg, "gnu") == 0)
2225 link_info.emit_gnu_hash = TRUE;
2226 else if (strcmp (optarg, "both") == 0)
2228 link_info.emit_hash = TRUE;
2229 link_info.emit_gnu_hash = TRUE;
2232 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2239 if (strcmp (optarg, "defs") == 0)
2240 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2241 else if (strcmp (optarg, "muldefs") == 0)
2242 link_info.allow_multiple_definition = TRUE;
2243 else if (CONST_STRNEQ (optarg, "max-page-size="))
2247 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2248 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2249 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2252 else if (CONST_STRNEQ (optarg, "common-page-size="))
2255 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2257 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2258 einfo (_("%P%F: invalid common page size \`%s'\n"),
2261 else if (CONST_STRNEQ (optarg, "stack-size="))
2264 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2265 if (*end || link_info.stacksize < 0)
2266 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2267 if (!link_info.stacksize)
2268 /* Use -1 for explicit no-stack, because zero means
2270 link_info.stacksize = -1;
2272 else if (strcmp (optarg, "execstack") == 0)
2274 link_info.execstack = TRUE;
2275 link_info.noexecstack = FALSE;
2277 else if (strcmp (optarg, "noexecstack") == 0)
2279 link_info.noexecstack = TRUE;
2280 link_info.execstack = FALSE;
2284 if test x"$BNDPLT" = xyes; then
2286 else if (strcmp (optarg, "bndplt") == 0)
2287 link_info.bndplt = TRUE;
2291 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2293 else if (strcmp (optarg, "global") == 0)
2294 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2295 else if (strcmp (optarg, "initfirst") == 0)
2296 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2297 else if (strcmp (optarg, "interpose") == 0)
2298 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2299 else if (strcmp (optarg, "loadfltr") == 0)
2300 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2301 else if (strcmp (optarg, "nodefaultlib") == 0)
2302 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2303 else if (strcmp (optarg, "nodelete") == 0)
2304 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2305 else if (strcmp (optarg, "nodlopen") == 0)
2306 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2307 else if (strcmp (optarg, "nodump") == 0)
2308 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2309 else if (strcmp (optarg, "now") == 0)
2311 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2312 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2314 else if (strcmp (optarg, "lazy") == 0)
2316 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2317 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2319 else if (strcmp (optarg, "origin") == 0)
2321 link_info.flags |= (bfd_vma) DF_ORIGIN;
2322 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2324 else if (strcmp (optarg, "combreloc") == 0)
2325 link_info.combreloc = TRUE;
2326 else if (strcmp (optarg, "nocombreloc") == 0)
2327 link_info.combreloc = FALSE;
2328 else if (strcmp (optarg, "nocopyreloc") == 0)
2329 link_info.nocopyreloc = TRUE;
2330 else if (strcmp (optarg, "relro") == 0)
2331 link_info.relro = TRUE;
2332 else if (strcmp (optarg, "norelro") == 0)
2333 link_info.relro = FALSE;
2334 else if (strcmp (optarg, "text") == 0)
2335 link_info.error_textrel = TRUE;
2336 else if (strcmp (optarg, "notext") == 0)
2337 link_info.error_textrel = FALSE;
2338 else if (strcmp (optarg, "textoff") == 0)
2339 link_info.error_textrel = FALSE;
2345 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2349 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2351 $PARSE_AND_LIST_ARGS_CASES
2363 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2367 gld${EMULATION_NAME}_list_options (FILE * file)
2370 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2373 --audit=AUDITLIB Specify a library to use for auditing\n"));
2375 -Bgroup Selects group name lookup rules for DSO\n"));
2380 --build-id[=STYLE] Generate build ID note\n"));
2382 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2385 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2386 Specify a library to use for auditing dependencies\n"));
2388 --disable-new-dtags Disable new dynamic tags\n"));
2390 --enable-new-dtags Enable new dynamic tags\n"));
2392 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2394 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2396 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2398 -z combreloc Merge dynamic relocs into one section and sort\n"));
2404 -z common-page-size=SIZE Set common page size to SIZE\n"));
2406 -z defs Report unresolved symbols in object files.\n"));
2408 -z execstack Mark executable as requiring executable stack\n"));
2411 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2414 -z global Make symbols in DSO available for subsequently\n\
2415 loaded objects\n"));
2417 -z initfirst Mark DSO to be initialized first at runtime\n"));
2419 -z interpose Mark object to interpose all DSOs but executable\n"));
2421 -z lazy Mark object lazy runtime binding (default)\n"));
2423 -z loadfltr Mark object requiring immediate process\n"));
2429 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2431 -z muldefs Allow multiple definitions\n"));
2434 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2437 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2439 -z nocopyreloc Don't create copy relocs\n"));
2441 -z nodefaultlib Mark object not to use default search paths\n"));
2443 -z nodelete Mark DSO non-deletable at runtime\n"));
2445 -z nodlopen Mark DSO not available to dlopen\n"));
2447 -z nodump Mark DSO not available to dldump\n"));
2452 -z noexecstack Mark executable as not requiring executable stack\n"));
2454 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2457 -z text Treat DT_TEXTREL in shared object as error\n"));
2459 -z notext Don't treat DT_TEXTREL in shared object as error\n"));
2461 -z textoff Don't treat DT_TEXTREL in shared object as error\n"));
2463 -z norelro Don't create RELRO program header\n"));
2465 -z now Mark object non-lazy runtime binding\n"));
2467 -z origin Mark object requiring immediate \$ORIGIN\n\
2468 processing at runtime\n"));
2470 -z relro Create RELRO program header\n"));
2472 -z stacksize=SIZE Set size of stack segment\n"));
2476 if test x"$BNDPLT" = xyes; then
2479 -z bndplt Always generate BND prefix in PLT entries\n"));
2483 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2485 $PARSE_AND_LIST_OPTIONS
2493 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2495 $PARSE_AND_LIST_EPILOGUE
2502 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2504 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2505 ${LDEMUL_SYSLIB-syslib_default},
2506 ${LDEMUL_HLL-hll_default},
2507 ${LDEMUL_AFTER_PARSE-after_parse_default},
2508 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2509 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2510 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2511 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2512 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2513 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2514 "${EMULATION_NAME}",
2516 ${LDEMUL_FINISH-finish_default},
2517 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2518 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2519 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2520 ${LDEMUL_SET_SYMBOLS-NULL},
2521 ${LDEMUL_PARSE_ARGS-NULL},
2522 gld${EMULATION_NAME}_add_options,
2523 gld${EMULATION_NAME}_handle_option,
2524 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2525 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2526 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2527 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2528 ${LDEMUL_NEW_VERS_PATTERN-NULL},
2529 ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL}