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.traditional_format)
1050 bfd *abfd, *elfbfd = NULL;
1051 bfd_boolean warn_eh_frame = FALSE;
1055 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1058 for (s = abfd->sections; s && type < COMPACT_EH_HDR; s = s->next)
1060 const char *name = bfd_get_section_name (abfd, s);
1062 if (bfd_is_abs_section (s->output_section))
1064 if (CONST_STRNEQ (name, ".eh_frame_entry"))
1065 type = COMPACT_EH_HDR;
1066 else if (strcmp (name, ".eh_frame") == 0 && s->size > 8)
1067 type = DWARF2_EH_HDR;
1076 else if (seen_type != type)
1078 einfo (_("%P%F: compact frame descriptions incompatible with"
1079 " DWARF2 .eh_frame from %B\n"),
1080 type == DWARF2_EH_HDR ? abfd : elfbfd);
1085 && (type == COMPACT_EH_HDR || link_info.eh_frame_hdr_type != 0))
1087 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1090 warn_eh_frame = TRUE;
1094 if (seen_type == COMPACT_EH_HDR)
1095 link_info.eh_frame_hdr_type = COMPACT_EH_HDR;
1097 if (bfd_count_sections (abfd) == 0)
1102 const struct elf_backend_data *bed;
1104 bed = get_elf_backend_data (elfbfd);
1105 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1106 bed->dynamic_sec_flags
1109 && bfd_set_section_alignment (elfbfd, s, 2))
1111 htab->eh_info.hdr_sec = s;
1112 warn_eh_frame = FALSE;
1116 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1117 " --eh-frame-hdr ignored.\n");
1120 /* Get the list of files which appear in DT_NEEDED entries in
1121 dynamic objects included in the link (often there will be none).
1122 For each such file, we want to track down the corresponding
1123 library, and include the symbol table in the link. This is what
1124 the runtime dynamic linker will do. Tracking the files down here
1125 permits one dynamic object to include another without requiring
1126 special action by the person doing the link. Note that the
1127 needed list can actually grow while we are stepping through this
1129 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1130 for (l = needed; l != NULL; l = l->next)
1132 struct bfd_link_needed_list *ll;
1133 struct dt_needed n, nn;
1136 /* If the lib that needs this one was --as-needed and wasn't
1137 found to be needed, then this lib isn't needed either. */
1139 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1142 /* Skip the lib if --no-copy-dt-needed-entries and
1143 --allow-shlib-undefined is in effect. */
1145 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1146 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1149 /* If we've already seen this file, skip it. */
1150 for (ll = needed; ll != l; ll = ll->next)
1152 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1153 && strcmp (ll->name, l->name) == 0)
1158 /* See if this file was included in the link explicitly. */
1160 global_found = NULL;
1161 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1162 if (global_found != NULL
1163 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1164 & DYN_AS_NEEDED) == 0)
1171 info_msg (_("%s needed by %B\n"), l->name, l->by);
1173 /* As-needed libs specified on the command line (or linker script)
1174 take priority over libs found in search dirs. */
1175 if (global_found != NULL)
1177 nn.name = global_found->filename;
1178 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1182 /* We need to find this file and include the symbol table. We
1183 want to search for the file in the same way that the dynamic
1184 linker will search. That means that we want to use
1185 rpath_link, rpath, then the environment variable
1186 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1187 entries (native only), then the linker script LIB_SEARCH_DIRS.
1188 We do not search using the -L arguments.
1190 We search twice. The first time, we skip objects which may
1191 introduce version mismatches. The second time, we force
1192 their use. See gld${EMULATION_NAME}_vercheck comment. */
1193 for (force = 0; force < 2; force++)
1196 search_dirs_type *search;
1198 if [ "x${NATIVE}" = xyes ] ; then
1200 const char *lib_path;
1203 if [ "x${USE_LIBPATH}" = xyes ] ; then
1205 struct bfd_link_needed_list *rp;
1211 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1215 if [ "x${USE_LIBPATH}" = xyes ] ; then
1217 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1222 if [ "x${NATIVE}" = xyes ] ; then
1224 if (command_line.rpath_link == NULL
1225 && command_line.rpath == NULL)
1227 lib_path = (const char *) getenv ("LD_RUN_PATH");
1228 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1232 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1233 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1237 if [ "x${USE_LIBPATH}" = xyes ] ; then
1240 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1241 for (; !found && rp != NULL; rp = rp->next)
1243 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1244 found = (rp->by == l->by
1245 && gld${EMULATION_NAME}_search_needed (tmpname,
1255 if [ "x${USE_LIBPATH}" = xyes ] ; then
1257 *-*-freebsd* | *-*-dragonfly*)
1259 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1265 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1267 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1276 len = strlen (l->name);
1277 for (search = search_head; search != NULL; search = search->next)
1281 if (search->cmdline)
1283 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1284 sprintf (filename, "%s/%s", search->name, l->name);
1286 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1299 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1303 if (link_info.eh_frame_hdr_type == COMPACT_EH_HDR)
1304 if (bfd_elf_parse_eh_frame_entries (NULL, &link_info) == FALSE)
1305 einfo (_("%P%F: Failed to parse EH frame entries.\n"));
1313 /* Look through an expression for an assignment statement. */
1316 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1318 bfd_boolean provide = FALSE;
1320 switch (exp->type.node_class)
1323 case etree_provided:
1327 /* We call record_link_assignment even if the symbol is defined.
1328 This is because if it is defined by a dynamic object, we
1329 actually want to use the value defined by the linker script,
1330 not the value from the dynamic object (because we are setting
1331 symbols like etext). If the symbol is defined by a regular
1332 object, then, as it happens, calling record_link_assignment
1334 if (strcmp (exp->assign.dst, ".") != 0)
1336 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1338 exp->assign.dst, provide,
1339 exp->assign.hidden))
1340 einfo ("%P%F: failed to record assignment to %s: %E\n",
1343 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1347 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1348 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1352 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1353 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1354 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1358 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1367 /* This is called by the before_allocation routine via
1368 lang_for_each_statement. It locates any assignment statements, and
1369 tells the ELF backend about them, in case they are assignments to
1370 symbols which are referred to by dynamic objects. */
1373 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1375 if (s->header.type == lang_assignment_statement_enum)
1376 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1381 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1382 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1383 ELF_INTERPRETER_SET_DEFAULT="
1384 if (sinterp != NULL)
1386 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1387 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1392 ELF_INTERPRETER_SET_DEFAULT=
1396 /* used by before_allocation and handle_option. */
1398 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1401 *to = xstrdup (op_arg);
1404 size_t to_len = strlen (*to);
1405 size_t op_arg_len = strlen (op_arg);
1409 /* First see whether OPTARG is already in the path. */
1412 if (strncmp (op_arg, cp, op_arg_len) == 0
1413 && (cp[op_arg_len] == 0
1414 || cp[op_arg_len] == config.rpath_separator))
1418 /* Not yet found. */
1419 cp = strchr (cp, config.rpath_separator);
1427 buf = xmalloc (to_len + op_arg_len + 2);
1428 sprintf (buf, "%s%c%s", *to,
1429 config.rpath_separator, op_arg);
1436 /* This is called after the sections have been attached to output
1437 sections, but before any sizes or addresses have been set. */
1440 gld${EMULATION_NAME}_before_allocation (void)
1445 struct elf_link_hash_entry *ehdr_start = NULL;
1446 #if defined(__GNUC__) && GCC_VERSION < 4006
1447 /* Work around a GCC uninitialized warning bug fixed in GCC 4.6. */
1448 struct bfd_link_hash_entry ehdr_start_save = ehdr_start_save;
1450 struct bfd_link_hash_entry ehdr_start_save;
1453 if (is_elf_hash_table (link_info.hash))
1455 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1457 /* Make __ehdr_start hidden if it has been referenced, to
1458 prevent the symbol from being dynamic. */
1459 if (!link_info.relocatable)
1461 struct elf_link_hash_entry *h
1462 = elf_link_hash_lookup (elf_hash_table (&link_info), "__ehdr_start",
1463 FALSE, FALSE, TRUE);
1465 /* Only adjust the export class if the symbol was referenced
1466 and not defined, otherwise leave it alone. */
1468 && (h->root.type == bfd_link_hash_new
1469 || h->root.type == bfd_link_hash_undefined
1470 || h->root.type == bfd_link_hash_undefweak
1471 || h->root.type == bfd_link_hash_common))
1473 _bfd_elf_link_hash_hide_symbol (&link_info, h, TRUE);
1474 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
1475 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
1476 /* Don't leave the symbol undefined. Undefined hidden
1477 symbols typically won't have dynamic relocations, but
1478 we most likely will need dynamic relocations for
1479 __ehdr_start if we are building a PIE or shared
1482 ehdr_start_save = h->root;
1483 h->root.type = bfd_link_hash_defined;
1484 h->root.u.def.section = bfd_abs_section_ptr;
1485 h->root.u.def.value = 0;
1489 /* If we are going to make any variable assignments, we need to
1490 let the ELF backend know about them in case the variables are
1491 referred to by dynamic objects. */
1492 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1495 /* Let the ELF backend work out the sizes of any sections required
1496 by dynamic linking. */
1497 rpath = command_line.rpath;
1499 rpath = (const char *) getenv ("LD_RUN_PATH");
1501 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
1502 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1504 const char *audit_libs = elf_dt_audit (abfd);
1506 /* If the input bfd contains an audit entry, we need to add it as
1507 a dep audit entry. */
1508 if (audit_libs && *audit_libs != '\0')
1510 char *cp = xstrdup (audit_libs);
1514 char *cp2 = strchr (cp, config.rpath_separator);
1522 if (cp != NULL && *cp != '\0')
1523 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1525 cp = more ? ++cp2 : NULL;
1531 if (! (bfd_elf_size_dynamic_sections
1532 (link_info.output_bfd, command_line.soname, rpath,
1533 command_line.filter_shlib, audit, depaudit,
1534 (const char * const *) command_line.auxiliary_filters,
1535 &link_info, &sinterp)))
1536 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1538 ${ELF_INTERPRETER_SET_DEFAULT}
1539 /* Let the user override the dynamic linker we are using. */
1540 if (command_line.interpreter != NULL
1543 sinterp->contents = (bfd_byte *) command_line.interpreter;
1544 sinterp->size = strlen (command_line.interpreter) + 1;
1547 /* Look for any sections named .gnu.warning. As a GNU extensions,
1548 we treat such sections as containing warning messages. We print
1549 out the warning message, and then zero out the section size so
1550 that it does not get copied into the output file. */
1553 LANG_FOR_EACH_INPUT_STATEMENT (is)
1560 if (is->flags.just_syms)
1563 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1568 msg = (char *) xmalloc ((size_t) (sz + 1));
1569 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1571 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1574 ret = link_info.callbacks->warning (&link_info, msg,
1575 (const char *) NULL,
1576 is->the_bfd, (asection *) NULL,
1581 /* Clobber the section size, so that we don't waste space
1582 copying the warning into the output file. If we've already
1583 sized the output section, adjust its size. The adjustment
1584 is on rawsize because targets that size sections early will
1585 have called lang_reset_memory_regions after sizing. */
1586 if (s->output_section != NULL
1587 && s->output_section->rawsize >= s->size)
1588 s->output_section->rawsize -= s->size;
1592 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1593 warning section don't get copied to the output. */
1594 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1598 before_allocation_default ();
1600 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1601 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1603 if (ehdr_start != NULL)
1605 /* If we twiddled __ehdr_start to defined earlier, put it back
1607 ehdr_start->root.type = ehdr_start_save.type;
1608 ehdr_start->root.u = ehdr_start_save.u;
1615 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1618 /* Try to open a dynamic archive. This is where we know that ELF
1619 dynamic libraries have an extension of .so (or .sl on oddball systems
1623 gld${EMULATION_NAME}_open_dynamic_archive
1624 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1626 const char *filename;
1629 bfd_boolean opened = FALSE;
1631 if (! entry->flags.maybe_archive)
1634 filename = entry->filename;
1635 len = strlen (search->name) + strlen (filename);
1636 if (entry->flags.full_name_provided)
1639 string = (char *) xmalloc (len);
1640 sprintf (string, "%s/%s", search->name, filename);
1646 len += strlen (arch) + sizeof "/lib.so";
1647 #ifdef EXTRA_SHLIB_EXTENSION
1648 xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
1649 ? strlen (EXTRA_SHLIB_EXTENSION) - 3
1652 string = (char *) xmalloc (len + xlen);
1653 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1654 #ifdef EXTRA_SHLIB_EXTENSION
1655 /* Try the .so extension first. If that fails build a new filename
1656 using EXTRA_SHLIB_EXTENSION. */
1657 opened = ldfile_try_open_bfd (string, entry);
1659 strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
1663 if (!opened && !ldfile_try_open_bfd (string, entry))
1669 entry->filename = string;
1671 /* We have found a dynamic object to include in the link. The ELF
1672 backend linker will create a DT_NEEDED entry in the .dynamic
1673 section naming this file. If this file includes a DT_SONAME
1674 entry, it will be used. Otherwise, the ELF linker will just use
1675 the name of the file. For an archive found by searching, like
1676 this one, the DT_NEEDED entry should consist of just the name of
1677 the file, without the path information used to find it. Note
1678 that we only need to do this if we have a dynamic object; an
1679 archive will never be referenced by a DT_NEEDED entry.
1681 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1682 very pretty. I haven't been able to think of anything that is
1684 if (bfd_check_format (entry->the_bfd, bfd_object)
1685 && (entry->the_bfd->flags & DYNAMIC) != 0)
1687 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1689 /* Rather than duplicating the logic above. Just use the
1690 filename we recorded earlier. */
1692 if (!entry->flags.full_name_provided)
1693 filename = lbasename (entry->filename);
1694 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1703 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1706 /* A variant of lang_output_section_find used by place_orphan. */
1708 static lang_output_section_statement_type *
1709 output_rel_find (asection *sec, int isdyn)
1711 lang_output_section_statement_type *lookup;
1712 lang_output_section_statement_type *last = NULL;
1713 lang_output_section_statement_type *last_alloc = NULL;
1714 lang_output_section_statement_type *last_ro_alloc = NULL;
1715 lang_output_section_statement_type *last_rel = NULL;
1716 lang_output_section_statement_type *last_rel_alloc = NULL;
1717 int rela = sec->name[4] == 'a';
1719 for (lookup = &lang_output_section_statement.head->output_section_statement;
1721 lookup = lookup->next)
1723 if (lookup->constraint >= 0
1724 && CONST_STRNEQ (lookup->name, ".rel"))
1726 int lookrela = lookup->name[4] == 'a';
1728 /* .rel.dyn must come before all other reloc sections, to suit
1733 /* Don't place after .rel.plt as doing so results in wrong
1735 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1738 if (rela == lookrela || last_rel == NULL)
1740 if ((rela == lookrela || last_rel_alloc == NULL)
1741 && lookup->bfd_section != NULL
1742 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1743 last_rel_alloc = lookup;
1747 if (lookup->bfd_section != NULL
1748 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1750 last_alloc = lookup;
1751 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1752 last_ro_alloc = lookup;
1757 return last_rel_alloc;
1763 return last_ro_alloc;
1771 /* Place an orphan section. We use this to put random SHF_ALLOC
1772 sections in the right segment. */
1774 static lang_output_section_statement_type *
1775 gld${EMULATION_NAME}_place_orphan (asection *s,
1776 const char *secname,
1779 static struct orphan_save hold[] =
1782 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1785 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1788 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
1791 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1797 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1800 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1803 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1809 enum orphan_save_index
1821 static int orphan_init_done = 0;
1822 struct orphan_save *place;
1823 lang_output_section_statement_type *after;
1824 lang_output_section_statement_type *os;
1825 lang_output_section_statement_type *match_by_name = NULL;
1827 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1828 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1830 if (! link_info.relocatable
1831 && link_info.combreloc
1832 && (s->flags & SEC_ALLOC))
1838 secname = ".rela.dyn";
1842 secname = ".rel.dyn";
1848 else if (CONST_STRNEQ (secname, ".rel"))
1850 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1855 /* Look through the script to see where to place this section. */
1856 if (constraint == 0)
1857 for (os = lang_output_section_find (secname);
1859 os = next_matching_output_section_statement (os, 0))
1861 /* If we don't match an existing output section, tell
1862 lang_insert_orphan to create a new output section. */
1863 constraint = SPECIAL;
1865 if (os->bfd_section != NULL
1866 && (os->bfd_section->flags == 0
1867 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1870 && ((s->flags ^ os->bfd_section->flags)
1871 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1873 /* We already have an output section statement with this
1874 name, and its bfd section has compatible flags.
1875 If the section already exists but does not have any flags
1876 set, then it has been created by the linker, probably as a
1877 result of a --section-start command line switch. */
1878 lang_add_section (&os->children, s, NULL, os);
1882 /* Save unused output sections in case we can match them
1883 against orphans later. */
1884 if (os->bfd_section == NULL)
1888 /* If we didn't match an active output section, see if we matched an
1889 unused one and use that. */
1892 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1893 return match_by_name;
1896 if (!orphan_init_done)
1898 struct orphan_save *ho;
1900 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1901 if (ho->name != NULL)
1903 ho->os = lang_output_section_find (ho->name);
1904 if (ho->os != NULL && ho->os->flags == 0)
1905 ho->os->flags = ho->flags;
1907 orphan_init_done = 1;
1910 /* If this is a final link, then always put .gnu.warning.SYMBOL
1911 sections into the .text section to get them out of the way. */
1912 if (link_info.executable
1913 && ! link_info.relocatable
1914 && CONST_STRNEQ (s->name, ".gnu.warning.")
1915 && hold[orphan_text].os != NULL)
1917 os = hold[orphan_text].os;
1918 lang_add_section (&os->children, s, NULL, os);
1922 /* Decide which segment the section should go in based on the
1923 section name and section flags. We put loadable .note sections
1924 right after the .interp section, so that the PT_NOTE segment is
1925 stored right after the program headers where the OS can read it
1926 in the first page. */
1929 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1930 place = &hold[orphan_nonalloc];
1931 else if ((s->flags & SEC_ALLOC) == 0)
1933 else if ((s->flags & SEC_LOAD) != 0
1934 && ((iself && sh_type == SHT_NOTE)
1935 || (!iself && CONST_STRNEQ (secname, ".note"))))
1936 place = &hold[orphan_interp];
1937 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1938 place = &hold[orphan_bss];
1939 else if ((s->flags & SEC_SMALL_DATA) != 0)
1940 place = &hold[orphan_sdata];
1941 else if ((s->flags & SEC_THREAD_LOCAL) != 0)
1942 place = &hold[orphan_tdata];
1943 else if ((s->flags & SEC_READONLY) == 0)
1944 place = &hold[orphan_data];
1945 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1946 || (!iself && CONST_STRNEQ (secname, ".rel")))
1947 && (s->flags & SEC_LOAD) != 0)
1948 place = &hold[orphan_rel];
1949 else if ((s->flags & SEC_CODE) == 0)
1950 place = &hold[orphan_rodata];
1952 place = &hold[orphan_text];
1957 if (place->os == NULL)
1959 if (place->name != NULL)
1960 place->os = lang_output_section_find (place->name);
1962 place->os = output_rel_find (s, isdyn);
1966 after = lang_output_section_find_by_flags
1967 (s, &place->os, _bfd_elf_match_sections_by_type);
1969 /* *ABS* is always the first output section statement. */
1970 after = &lang_output_section_statement.head->output_section_statement;
1973 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1978 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1982 gld${EMULATION_NAME}_after_allocation (void)
1984 int need_layout = bfd_elf_discard_info (link_info.output_bfd, &link_info);
1986 if (need_layout < 0)
1987 einfo ("%X%P: .eh_frame/.stab edit: %E\n");
1989 gld${EMULATION_NAME}_map_segments (need_layout);
1994 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1998 gld${EMULATION_NAME}_get_script (int *isfile)
2001 if test x"$COMPILE_IN" = xyes
2003 # Scripts compiled in.
2005 # sed commands to quote an ld script as a C string.
2006 sc="-f stringify.sed"
2012 if (link_info.relocatable && config.build_constructors)
2015 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2016 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
2017 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2018 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2019 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2020 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2021 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2022 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2024 if test -n "$GENERATE_PIE_SCRIPT" ; then
2025 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2026 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2027 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2028 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2029 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2030 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2031 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2033 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2034 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2036 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2037 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2038 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2039 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2040 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2041 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2042 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2043 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2045 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2046 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2048 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2049 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2050 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2051 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2052 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2053 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2055 echo ' ; else return' >> e${EMULATION_NAME}.c
2056 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2057 echo '; }' >> e${EMULATION_NAME}.c
2060 # Scripts read from the filesystem.
2066 if (link_info.relocatable && config.build_constructors)
2067 return "ldscripts/${EMULATION_NAME}.xu";
2068 else if (link_info.relocatable)
2069 return "ldscripts/${EMULATION_NAME}.xr";
2070 else if (!config.text_read_only)
2071 return "ldscripts/${EMULATION_NAME}.xbn";
2073 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2076 else if (!config.magic_demand_paged)
2077 return "ldscripts/${EMULATION_NAME}.xn";
2080 if test -n "$GENERATE_PIE_SCRIPT" ; then
2081 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2083 else if (link_info.pie && link_info.combreloc
2084 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2085 return "ldscripts/${EMULATION_NAME}.xdw";
2086 else if (link_info.pie && link_info.combreloc)
2087 return "ldscripts/${EMULATION_NAME}.xdc";
2091 else if (link_info.pie)
2092 return "ldscripts/${EMULATION_NAME}.xd";
2095 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2096 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2098 else if (link_info.shared && link_info.combreloc
2099 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2100 return "ldscripts/${EMULATION_NAME}.xsw";
2101 else if (link_info.shared && link_info.combreloc)
2102 return "ldscripts/${EMULATION_NAME}.xsc";
2106 else if (link_info.shared)
2107 return "ldscripts/${EMULATION_NAME}.xs";
2110 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2112 else if (link_info.combreloc && link_info.relro
2113 && (link_info.flags & DF_BIND_NOW))
2114 return "ldscripts/${EMULATION_NAME}.xw";
2115 else if (link_info.combreloc)
2116 return "ldscripts/${EMULATION_NAME}.xc";
2121 return "ldscripts/${EMULATION_NAME}.x";
2128 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2130 $PARSE_AND_LIST_PROLOGUE
2136 #define OPTION_DISABLE_NEW_DTAGS (400)
2137 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2138 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2139 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2140 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2141 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2142 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2143 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2144 #define OPTION_COMPRESS_DEBUG (OPTION_AUDIT + 1)
2147 gld${EMULATION_NAME}_add_options
2148 (int ns, char **shortopts, int nl, struct option **longopts,
2149 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2152 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2154 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2158 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2162 static const struct option xtra_long[] = {
2164 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2166 {"audit", required_argument, NULL, OPTION_AUDIT},
2167 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2171 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2172 {"compress-debug-sections", required_argument, NULL, OPTION_COMPRESS_DEBUG},
2174 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2176 {"depaudit", required_argument, NULL, 'P'},
2177 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2178 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2179 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2180 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2181 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2184 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2186 $PARSE_AND_LIST_LONGOPTS
2190 {NULL, no_argument, NULL, 0}
2193 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2194 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2195 *longopts = (struct option *)
2196 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2197 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2200 #define DEFAULT_BUILD_ID_STYLE "sha1"
2203 gld${EMULATION_NAME}_handle_option (int optc)
2210 case OPTION_BUILD_ID:
2211 if (emit_note_gnu_build_id != NULL)
2213 free ((char *) emit_note_gnu_build_id);
2214 emit_note_gnu_build_id = NULL;
2217 optarg = DEFAULT_BUILD_ID_STYLE;
2218 if (strcmp (optarg, "none"))
2219 emit_note_gnu_build_id = xstrdup (optarg);
2222 case OPTION_COMPRESS_DEBUG:
2223 if (strcasecmp (optarg, "none") == 0)
2224 link_info.compress_debug = COMPRESS_DEBUG_NONE;
2225 else if (strcasecmp (optarg, "zlib") == 0)
2226 link_info.compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
2227 else if (strcasecmp (optarg, "zlib-gnu") == 0)
2228 link_info.compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
2229 else if (strcasecmp (optarg, "zlib-gabi") == 0)
2230 link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
2232 einfo (_("%P%F: invalid --compress-debug-sections option: \`%s'\n"),
2237 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2240 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2244 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2247 case OPTION_DISABLE_NEW_DTAGS:
2248 link_info.new_dtags = FALSE;
2251 case OPTION_ENABLE_NEW_DTAGS:
2252 link_info.new_dtags = TRUE;
2255 case OPTION_EH_FRAME_HDR:
2256 link_info.eh_frame_hdr_type = DWARF2_EH_HDR;
2260 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2261 /* Groups must be self-contained. */
2262 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2263 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2266 case OPTION_EXCLUDE_LIBS:
2267 add_excluded_libs (optarg);
2270 case OPTION_HASH_STYLE:
2271 link_info.emit_hash = FALSE;
2272 link_info.emit_gnu_hash = FALSE;
2273 if (strcmp (optarg, "sysv") == 0)
2274 link_info.emit_hash = TRUE;
2275 else if (strcmp (optarg, "gnu") == 0)
2276 link_info.emit_gnu_hash = TRUE;
2277 else if (strcmp (optarg, "both") == 0)
2279 link_info.emit_hash = TRUE;
2280 link_info.emit_gnu_hash = TRUE;
2283 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2290 if (strcmp (optarg, "defs") == 0)
2291 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2292 else if (strcmp (optarg, "muldefs") == 0)
2293 link_info.allow_multiple_definition = TRUE;
2294 else if (CONST_STRNEQ (optarg, "max-page-size="))
2298 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2299 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2300 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2303 else if (CONST_STRNEQ (optarg, "common-page-size="))
2306 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2308 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2309 einfo (_("%P%F: invalid common page size \`%s'\n"),
2312 else if (CONST_STRNEQ (optarg, "stack-size="))
2315 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2316 if (*end || link_info.stacksize < 0)
2317 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2318 if (!link_info.stacksize)
2319 /* Use -1 for explicit no-stack, because zero means
2321 link_info.stacksize = -1;
2323 else if (strcmp (optarg, "execstack") == 0)
2325 link_info.execstack = TRUE;
2326 link_info.noexecstack = FALSE;
2328 else if (strcmp (optarg, "noexecstack") == 0)
2330 link_info.noexecstack = TRUE;
2331 link_info.execstack = FALSE;
2335 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2337 else if (strcmp (optarg, "global") == 0)
2338 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2339 else if (strcmp (optarg, "initfirst") == 0)
2340 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2341 else if (strcmp (optarg, "interpose") == 0)
2342 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2343 else if (strcmp (optarg, "loadfltr") == 0)
2344 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2345 else if (strcmp (optarg, "nodefaultlib") == 0)
2346 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2347 else if (strcmp (optarg, "nodelete") == 0)
2348 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2349 else if (strcmp (optarg, "nodlopen") == 0)
2350 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2351 else if (strcmp (optarg, "nodump") == 0)
2352 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2353 else if (strcmp (optarg, "now") == 0)
2355 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2356 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2358 else if (strcmp (optarg, "lazy") == 0)
2360 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2361 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2363 else if (strcmp (optarg, "origin") == 0)
2365 link_info.flags |= (bfd_vma) DF_ORIGIN;
2366 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2368 else if (strcmp (optarg, "combreloc") == 0)
2369 link_info.combreloc = TRUE;
2370 else if (strcmp (optarg, "nocombreloc") == 0)
2371 link_info.combreloc = FALSE;
2372 else if (strcmp (optarg, "nocopyreloc") == 0)
2373 link_info.nocopyreloc = TRUE;
2374 else if (strcmp (optarg, "relro") == 0)
2375 link_info.relro = TRUE;
2376 else if (strcmp (optarg, "norelro") == 0)
2377 link_info.relro = FALSE;
2378 else if (strcmp (optarg, "text") == 0)
2379 link_info.error_textrel = TRUE;
2380 else if (strcmp (optarg, "notext") == 0)
2381 link_info.error_textrel = FALSE;
2382 else if (strcmp (optarg, "textoff") == 0)
2383 link_info.error_textrel = FALSE;
2387 if test -n "$PARSE_AND_LIST_ARGS_CASE_Z" ; then
2389 $PARSE_AND_LIST_ARGS_CASE_Z
2395 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2399 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2401 $PARSE_AND_LIST_ARGS_CASES
2413 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2414 gld_list_options="gld${EMULATION_NAME}_list_options"
2415 if test -n "$PARSE_AND_LIST_OPTIONS"; then
2419 gld${EMULATION_NAME}_list_options (FILE * file)
2423 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2425 $PARSE_AND_LIST_OPTIONS
2433 gld_list_options="NULL"
2436 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2438 $PARSE_AND_LIST_EPILOGUE
2445 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2447 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2448 ${LDEMUL_SYSLIB-syslib_default},
2449 ${LDEMUL_HLL-hll_default},
2450 ${LDEMUL_AFTER_PARSE-after_parse_default},
2451 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2452 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2453 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2454 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2455 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2456 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2457 "${EMULATION_NAME}",
2459 ${LDEMUL_FINISH-finish_default},
2460 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2461 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2462 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2463 ${LDEMUL_SET_SYMBOLS-NULL},
2464 ${LDEMUL_PARSE_ARGS-NULL},
2465 gld${EMULATION_NAME}_add_options,
2466 gld${EMULATION_NAME}_handle_option,
2467 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2468 ${LDEMUL_LIST_OPTIONS-${gld_list_options}},
2469 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2470 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2471 ${LDEMUL_NEW_VERS_PATTERN-NULL},
2472 ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL}