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 ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
17 Free Software Foundation, Inc.
18 Written by Steve Chamberlain <sac@cygnus.com>
19 ELF support by Ian Lance Taylor <ian@cygnus.com>
21 This file is part of the GNU Binutils.
23 This program is free software; you can redistribute it and/or modify
24 it under the terms of the GNU General Public License as published by
25 the Free Software Foundation; either version 3 of the License, or
26 (at your option) any later version.
28 This program is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
33 You should have received a copy of the GNU General Public License
34 along with this program; if not, write to the Free Software
35 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
36 MA 02110-1301, USA. */
38 #define TARGET_IS_${EMULATION_NAME}
42 #include "libiberty.h"
43 #include "filenames.h"
44 #include "safe-ctype.h"
60 #include "elf/common.h"
62 #include "filenames.h"
64 /* Declare functions used by various EXTRA_EM_FILEs. */
65 static void gld${EMULATION_NAME}_before_parse (void);
66 static void gld${EMULATION_NAME}_after_open (void);
67 static void gld${EMULATION_NAME}_before_allocation (void);
68 static void gld${EMULATION_NAME}_after_allocation (void);
69 static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan
70 (asection *, const char *, int);
73 if [ "x${USE_LIBPATH}" = xyes ] ; then
75 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
85 # Import any needed special functions and/or overrides.
87 source_em ${srcdir}/emultempl/elf-generic.em
88 if test -n "$EXTRA_EM_FILE" ; then
89 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
92 # Functions in this file can be overridden by setting the LDEMUL_* shell
93 # variables. If the name of the overriding function is the same as is
94 # defined in this file, then don't output this file's version.
95 # If a different overriding name is given then output the standard function
96 # as presumably it is called from the overriding function.
98 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
102 gld${EMULATION_NAME}_before_parse (void)
104 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
105 input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
106 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
107 config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
113 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
115 /* Handle the generation of DT_NEEDED tags. */
118 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
122 /* Tell the ELF linker that we don't want the output file to have a
123 DT_NEEDED entry for this file, unless it is used to resolve
124 references in a regular object. */
125 if (entry->flags.add_DT_NEEDED_for_regular)
126 link_class = DYN_AS_NEEDED;
128 /* Tell the ELF linker that we don't want the output file to have a
129 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
131 if (!entry->flags.add_DT_NEEDED_for_dynamic)
132 link_class |= DYN_NO_ADD_NEEDED;
134 if (entry->flags.just_syms
135 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
136 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
140 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
143 bfd_elf_set_dyn_lib_class (entry->the_bfd,
144 (enum dynamic_lib_link_class) link_class);
146 /* Continue on with normal load_symbols processing. */
154 /* These variables are required to pass information back and forth
155 between after_open and check_needed and stat_needed and vercheck. */
157 static struct bfd_link_needed_list *global_needed;
158 static struct stat global_stat;
159 static lang_input_statement_type *global_found;
160 static struct bfd_link_needed_list *global_vercheck_needed;
161 static bfd_boolean global_vercheck_failed;
163 /* These variables are used to implement target options */
165 static char *audit; /* colon (typically) separated list of libs */
166 static char *depaudit; /* colon (typically) separated list of libs */
168 /* Style of .note.gnu.build-id section. */
169 static const char *emit_note_gnu_build_id;
171 /* On Linux, it's possible to have different versions of the same
172 shared library linked against different versions of libc. The
173 dynamic linker somehow tags which libc version to use in
174 /etc/ld.so.cache, and, based on the libc that it sees in the
175 executable, chooses which version of the shared library to use.
177 We try to do a similar check here by checking whether this shared
178 library needs any other shared libraries which may conflict with
179 libraries we have already included in the link. If it does, we
180 skip it, and try to find another shared library farther on down the
183 This is called via lang_for_each_input_file.
184 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
185 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
186 a conflicting version. */
189 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
192 struct bfd_link_needed_list *l;
194 if (global_vercheck_failed)
196 if (s->the_bfd == NULL
197 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
200 soname = bfd_elf_get_dt_soname (s->the_bfd);
202 soname = lbasename (bfd_get_filename (s->the_bfd));
204 for (l = global_vercheck_needed; l != NULL; l = l->next)
208 if (filename_cmp (soname, l->name) == 0)
210 /* Probably can't happen, but it's an easy check. */
214 if (strchr (l->name, '/') != NULL)
217 suffix = strstr (l->name, ".so.");
221 suffix += sizeof ".so." - 1;
223 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
225 /* Here we know that S is a dynamic object FOO.SO.VER1, and
226 the object we are considering needs a dynamic object
227 FOO.SO.VER2, and VER1 and VER2 are different. This
228 appears to be a version mismatch, so we tell the caller
229 to try a different version of this library. */
230 global_vercheck_failed = TRUE;
237 /* See if an input file matches a DT_NEEDED entry by running stat on
241 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
247 if (global_found != NULL)
249 if (s->the_bfd == NULL)
252 /* If this input file was an as-needed entry, and wasn't found to be
253 needed at the stage it was linked, then don't say we have loaded it. */
254 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
257 if (bfd_stat (s->the_bfd, &st) != 0)
259 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
263 /* Some operating systems, e.g. Windows, do not provide a meaningful
264 st_ino; they always set it to zero. (Windows does provide a
265 meaningful st_dev.) Do not indicate a duplicate library in that
266 case. While there is no guarantee that a system that provides
267 meaningful inode numbers will never set st_ino to zero, this is
268 merely an optimization, so we do not need to worry about false
270 if (st.st_dev == global_stat.st_dev
271 && st.st_ino == global_stat.st_ino
278 /* We issue a warning if it looks like we are including two
279 different versions of the same shared library. For example,
280 there may be a problem if -lc picks up libc.so.6 but some other
281 shared library has a DT_NEEDED entry of libc.so.5. This is a
282 heuristic test, and it will only work if the name looks like
283 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
284 If we really want to issue warnings about mixing version numbers
285 of shared libraries, we need to find a better way. */
287 if (strchr (global_needed->name, '/') != NULL)
289 suffix = strstr (global_needed->name, ".so.");
292 suffix += sizeof ".so." - 1;
294 soname = bfd_elf_get_dt_soname (s->the_bfd);
296 soname = lbasename (s->filename);
298 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
299 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
300 global_needed->name, global_needed->by, soname);
309 /* This function is called for each possible name for a dynamic object
310 named by a DT_NEEDED entry. The FORCE parameter indicates whether
311 to skip the check for a conflicting version. */
314 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
318 const char *name = needed->name;
322 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
326 /* Linker needs to decompress sections. */
327 abfd->flags |= BFD_DECOMPRESS;
329 if (! bfd_check_format (abfd, bfd_object))
334 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
340 /* For DT_NEEDED, they have to match. */
341 if (abfd->xvec != link_info.output_bfd->xvec)
347 /* Check whether this object would include any conflicting library
348 versions. If FORCE is set, then we skip this check; we use this
349 the second time around, if we couldn't find any compatible
350 instance of the shared library. */
354 struct bfd_link_needed_list *needs;
356 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
357 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
361 global_vercheck_needed = needs;
362 global_vercheck_failed = FALSE;
363 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
364 if (global_vercheck_failed)
367 /* Return FALSE to force the caller to move on to try
368 another file on the search path. */
372 /* But wait! It gets much worse. On Linux, if a shared
373 library does not use libc at all, we are supposed to skip
374 it the first time around in case we encounter a shared
375 library later on with the same name which does use the
376 version of libc that we want. This is much too horrible
377 to use on any system other than Linux. */
381 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
384 struct bfd_link_needed_list *l;
386 for (l = needs; l != NULL; l = l->next)
387 if (CONST_STRNEQ (l->name, "libc.so"))
403 /* We've found a dynamic object matching the DT_NEEDED entry. */
405 /* We have already checked that there is no other input file of the
406 same name. We must now check again that we are not including the
407 same file twice. We need to do this because on many systems
408 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
409 reference libc.so.1. If we have already included libc.so, we
410 don't want to include libc.so.1 if they are the same file, and we
411 can only check that using stat. */
413 if (bfd_stat (abfd, &global_stat) != 0)
414 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
416 /* First strip off everything before the last '/'. */
417 soname = lbasename (abfd->filename);
420 info_msg (_("found %s at %s\n"), soname, name);
423 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
424 if (global_found != NULL)
426 /* Return TRUE to indicate that we found the file, even though
427 we aren't going to do anything with it. */
431 /* Specify the soname to use. */
432 bfd_elf_set_dt_needed_name (abfd, soname);
434 /* Tell the ELF linker that we don't want the output file to have a
435 DT_NEEDED entry for this file, unless it is used to resolve
436 references in a regular object. */
437 link_class = DYN_DT_NEEDED;
439 /* Tell the ELF linker that we don't want the output file to have a
440 DT_NEEDED entry for this file at all if the entry is from a file
441 with DYN_NO_ADD_NEEDED. */
442 if (needed->by != NULL
443 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
444 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
446 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
448 /* Add this file into the symbol table. */
449 if (! bfd_link_add_symbols (abfd, &link_info))
450 einfo ("%F%B: error adding symbols: %E\n", abfd);
456 /* Search for a needed file in a path. */
459 gld${EMULATION_NAME}_search_needed (const char *path,
460 struct dt_needed *n, int force)
463 const char *name = n->name;
465 struct dt_needed needed;
468 return gld${EMULATION_NAME}_try_needed (n, force);
470 if (path == NULL || *path == '\0')
474 needed.name = n->name;
479 char *filename, *sset;
481 s = strchr (path, config.rpath_separator);
483 s = path + strlen (path);
485 #if HAVE_DOS_BASED_FILE_SYSTEM
486 /* Assume a match on the second char is part of drive specifier. */
487 else if (config.rpath_separator == ':'
491 s = strchr (s + 1, config.rpath_separator);
493 s = path + strlen (path);
496 filename = (char *) xmalloc (s - path + len + 2);
501 memcpy (filename, path, s - path);
502 filename[s - path] = '/';
503 sset = filename + (s - path) + 1;
507 needed.name = filename;
508 if (gld${EMULATION_NAME}_try_needed (&needed, force))
522 if [ "x${USE_LIBPATH}" = xyes ] ; then
525 /* Add the sysroot to every entry in a path separated by
526 config.rpath_separator. */
529 gld${EMULATION_NAME}_add_sysroot (const char *path)
538 if (path[i++] == config.rpath_separator)
544 len = len + (colons + 1) * strlen (ld_sysroot);
545 ret = xmalloc (len + 1);
546 strcpy (ret, ld_sysroot);
547 p = ret + strlen (ret);
550 if (path[i] == config.rpath_separator)
553 strcpy (p, ld_sysroot);
565 *-*-freebsd* | *-*-dragonfly*)
567 /* Read the system search path the FreeBSD way rather than the Linux way. */
568 #ifdef HAVE_ELF_HINTS_H
569 #include <elf-hints.h>
571 #include "elf-hints-local.h"
575 gld${EMULATION_NAME}_check_ld_elf_hints (const struct bfd_link_needed_list *l,
578 static bfd_boolean initialized;
579 static char *ld_elf_hints;
580 struct dt_needed needed;
587 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
588 f = fopen (tmppath, FOPEN_RB);
592 struct elfhints_hdr hdr;
594 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
595 && hdr.magic == ELFHINTS_MAGIC
598 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
602 b = xmalloc (hdr.dirlistlen + 1);
603 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
605 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
616 if (ld_elf_hints == NULL)
620 needed.name = l->name;
621 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, &needed, force);
627 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
629 /* For a native linker, check the file /etc/ld.so.conf for directories
630 in which we may find shared libraries. /etc/ld.so.conf is really
631 only meaningful on Linux. */
633 struct gld${EMULATION_NAME}_ld_so_conf
640 gld${EMULATION_NAME}_parse_ld_so_conf
641 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
644 gld${EMULATION_NAME}_parse_ld_so_conf_include
645 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
653 if (pattern[0] != '/')
655 char *p = strrchr (filename, '/');
656 size_t patlen = strlen (pattern) + 1;
658 newp = xmalloc (p - filename + 1 + patlen);
659 memcpy (newp, filename, p - filename + 1);
660 memcpy (newp + (p - filename + 1), pattern, patlen);
665 if (glob (pattern, 0, NULL, &gl) == 0)
669 for (i = 0; i < gl.gl_pathc; ++i)
670 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
674 /* If we do not have glob, treat the pattern as a literal filename. */
675 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
683 gld${EMULATION_NAME}_parse_ld_so_conf
684 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
686 FILE *f = fopen (filename, FOPEN_RT);
694 line = xmalloc (linelen);
699 /* Normally this would use getline(3), but we need to be portable. */
700 while ((q = fgets (p, linelen - (p - line), f)) != NULL
701 && strlen (q) == linelen - (p - line) - 1
702 && line[linelen - 2] != '\n')
704 line = xrealloc (line, 2 * linelen);
705 p = line + linelen - 1;
709 if (q == NULL && p == line)
712 p = strchr (line, '\n');
716 /* Because the file format does not know any form of quoting we
717 can search forward for the next '#' character and if found
718 make it terminating the line. */
719 p = strchr (line, '#');
723 /* Remove leading whitespace. NUL is no whitespace character. */
725 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
728 /* If the line is blank it is ignored. */
732 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
738 while (*p == ' ' || *p == '\t')
746 while (*p != ' ' && *p != '\t' && *p)
752 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
760 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
761 && *p != '\r' && *p != '\v')
764 while (p != dir && p[-1] == '/')
766 if (info->path == NULL)
768 info->alloc = p - dir + 1 + 256;
769 info->path = xmalloc (info->alloc);
774 if (info->len + 1 + (p - dir) >= info->alloc)
776 info->alloc += p - dir + 256;
777 info->path = xrealloc (info->path, info->alloc);
779 info->path[info->len++] = config.rpath_separator;
781 memcpy (info->path + info->len, dir, p - dir);
782 info->len += p - dir;
783 info->path[info->len] = '\0';
793 gld${EMULATION_NAME}_check_ld_so_conf (const struct bfd_link_needed_list *l,
796 static bfd_boolean initialized;
797 static char *ld_so_conf;
798 struct dt_needed needed;
803 struct gld${EMULATION_NAME}_ld_so_conf info;
806 info.len = info.alloc = 0;
807 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
808 (const char *) NULL);
809 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
812 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
813 (const char *) NULL);
814 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
820 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
827 if (ld_so_conf == NULL)
832 needed.name = l->name;
833 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
843 /* See if an input file matches a DT_NEEDED entry by name. */
846 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
850 /* Stop looking if we've found a loaded lib. */
851 if (global_found != NULL
852 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
853 & DYN_AS_NEEDED) == 0)
856 if (s->filename == NULL || s->the_bfd == NULL)
859 /* Don't look for a second non-loaded as-needed lib. */
860 if (global_found != NULL
861 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
864 if (filename_cmp (s->filename, global_needed->name) == 0)
870 if (s->flags.search_dirs)
872 const char *f = strrchr (s->filename, '/');
874 && filename_cmp (f + 1, global_needed->name) == 0)
881 soname = bfd_elf_get_dt_soname (s->the_bfd);
883 && filename_cmp (soname, global_needed->name) == 0)
892 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
896 id_note_section_size (bfd *abfd)
898 const char *style = emit_note_gnu_build_id;
903 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
904 size = (size + 3) & -(bfd_size_type) 4;
906 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
908 else if (!strcmp (style, "sha1"))
910 else if (!strncmp (style, "0x", 2))
912 /* ID is in string form (hex). Convert to bits. */
913 const char *id = style + 2;
916 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
921 else if (*id == '-' || *id == ':')
928 } while (*id != '\0');
937 read_hex (const char xdigit)
939 if (ISDIGIT (xdigit))
941 if (ISUPPER (xdigit))
942 return xdigit - 'A' + 0xa;
943 if (ISLOWER (xdigit))
944 return xdigit - 'a' + 0xa;
950 write_build_id (bfd *abfd)
952 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
953 struct elf_obj_tdata *t = elf_tdata (abfd);
956 Elf_Internal_Shdr *i_shdr;
957 unsigned char *contents, *id_bits;
960 Elf_External_Note *e_note;
961 typedef void (*sum_fn) (const void *, size_t, void *);
963 style = t->o->build_id.style;
964 asec = t->o->build_id.sec;
965 if (bfd_is_abs_section (asec->output_section))
967 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
968 " --build-id ignored.\n"));
971 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
973 if (i_shdr->contents == NULL)
975 if (asec->contents == NULL)
976 asec->contents = (unsigned char *) xmalloc (asec->size);
977 contents = asec->contents;
980 contents = i_shdr->contents + asec->output_offset;
982 e_note = (Elf_External_Note *) contents;
983 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
984 size = (size + 3) & -(bfd_size_type) 4;
985 id_bits = contents + size;
986 size = asec->size - size;
988 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
989 bfd_h_put_32 (abfd, size, &e_note->descsz);
990 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
991 memcpy (e_note->name, "GNU", sizeof "GNU");
993 if (strcmp (style, "md5") == 0)
998 if (!bed->s->checksum_contents (abfd, (sum_fn) &md5_process_bytes, &ctx))
1000 md5_finish_ctx (&ctx, id_bits);
1002 else if (strcmp (style, "sha1") == 0)
1004 struct sha1_ctx ctx;
1006 sha1_init_ctx (&ctx);
1007 if (!bed->s->checksum_contents (abfd, (sum_fn) &sha1_process_bytes, &ctx))
1009 sha1_finish_ctx (&ctx, id_bits);
1011 else if (strcmp (style, "uuid") == 0)
1014 int fd = open ("/dev/urandom", O_RDONLY);
1017 n = read (fd, id_bits, size);
1022 else if (strncmp (style, "0x", 2) == 0)
1024 /* ID is in string form (hex). Convert to bits. */
1025 const char *id = style + 2;
1029 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1031 id_bits[n] = read_hex (*id++) << 4;
1032 id_bits[n++] |= read_hex (*id++);
1034 else if (*id == '-' || *id == ':')
1037 abort (); /* Should have been validated earlier. */
1038 } while (*id != '\0');
1041 abort (); /* Should have been validated earlier. */
1043 position = i_shdr->sh_offset + asec->output_offset;
1045 return (bfd_seek (abfd, position, SEEK_SET) == 0
1046 && bfd_bwrite (contents, size, abfd) == size);
1049 /* Make .note.gnu.build-id section, and set up elf_tdata->build_id. */
1052 setup_build_id (bfd *ibfd)
1058 size = id_note_section_size (ibfd);
1061 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1065 flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
1066 | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
1067 s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags);
1068 if (s != NULL && bfd_set_section_alignment (ibfd, s, 2))
1070 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1071 t->o->build_id.after_write_object_contents = &write_build_id;
1072 t->o->build_id.style = emit_note_gnu_build_id;
1073 t->o->build_id.sec = s;
1074 elf_section_type (s) = SHT_NOTE;
1079 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1080 " --build-id ignored.\n");
1084 /* This is called after all the input files have been opened. */
1087 gld${EMULATION_NAME}_after_open (void)
1089 struct bfd_link_needed_list *needed, *l;
1090 struct elf_link_hash_table *htab;
1092 after_open_default ();
1094 htab = elf_hash_table (&link_info);
1095 if (!is_elf_hash_table (htab))
1098 if (emit_note_gnu_build_id != NULL)
1102 /* Find an ELF input. */
1103 for (abfd = link_info.input_bfds;
1104 abfd != (bfd *) NULL; abfd = abfd->link_next)
1105 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1108 /* PR 10555: If there are no ELF input files do not try to
1109 create a .note.gnu-build-id section. */
1111 || !setup_build_id (abfd))
1113 free ((char *) emit_note_gnu_build_id);
1114 emit_note_gnu_build_id = NULL;
1118 if (link_info.relocatable)
1121 if (link_info.eh_frame_hdr
1122 && !link_info.traditional_format)
1124 bfd *abfd, *elfbfd = NULL;
1125 bfd_boolean warn_eh_frame = FALSE;
1128 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1130 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1134 s = bfd_get_section_by_name (abfd, ".eh_frame");
1137 || bfd_is_abs_section (s->output_section)))
1138 s = bfd_get_next_section_by_name (s);
1139 warn_eh_frame = s != NULL;
1141 if (elfbfd && warn_eh_frame)
1146 const struct elf_backend_data *bed;
1148 bed = get_elf_backend_data (elfbfd);
1149 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1150 bed->dynamic_sec_flags
1153 && bfd_set_section_alignment (elfbfd, s, 2))
1155 htab->eh_info.hdr_sec = s;
1156 warn_eh_frame = FALSE;
1160 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1161 " --eh-frame-hdr ignored.\n");
1164 /* Get the list of files which appear in DT_NEEDED entries in
1165 dynamic objects included in the link (often there will be none).
1166 For each such file, we want to track down the corresponding
1167 library, and include the symbol table in the link. This is what
1168 the runtime dynamic linker will do. Tracking the files down here
1169 permits one dynamic object to include another without requiring
1170 special action by the person doing the link. Note that the
1171 needed list can actually grow while we are stepping through this
1173 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1174 for (l = needed; l != NULL; l = l->next)
1176 struct bfd_link_needed_list *ll;
1177 struct dt_needed n, nn;
1180 /* If the lib that needs this one was --as-needed and wasn't
1181 found to be needed, then this lib isn't needed either. */
1183 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1186 /* Skip the lib if --no-copy-dt-needed-entries and
1187 --allow-shlib-undefined is in effect. */
1189 && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
1190 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
1193 /* If we've already seen this file, skip it. */
1194 for (ll = needed; ll != l; ll = ll->next)
1196 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1197 && strcmp (ll->name, l->name) == 0)
1202 /* See if this file was included in the link explicitly. */
1204 global_found = NULL;
1205 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1206 if (global_found != NULL
1207 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1208 & DYN_AS_NEEDED) == 0)
1215 info_msg (_("%s needed by %B\n"), l->name, l->by);
1217 /* As-needed libs specified on the command line (or linker script)
1218 take priority over libs found in search dirs. */
1219 if (global_found != NULL)
1221 nn.name = global_found->filename;
1222 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1226 /* We need to find this file and include the symbol table. We
1227 want to search for the file in the same way that the dynamic
1228 linker will search. That means that we want to use
1229 rpath_link, rpath, then the environment variable
1230 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1231 entries (native only), then the linker script LIB_SEARCH_DIRS.
1232 We do not search using the -L arguments.
1234 We search twice. The first time, we skip objects which may
1235 introduce version mismatches. The second time, we force
1236 their use. See gld${EMULATION_NAME}_vercheck comment. */
1237 for (force = 0; force < 2; force++)
1240 search_dirs_type *search;
1242 if [ "x${NATIVE}" = xyes ] ; then
1244 const char *lib_path;
1247 if [ "x${USE_LIBPATH}" = xyes ] ; then
1249 struct bfd_link_needed_list *rp;
1255 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1259 if [ "x${USE_LIBPATH}" = xyes ] ; then
1261 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1266 if [ "x${NATIVE}" = xyes ] ; then
1268 if (command_line.rpath_link == NULL
1269 && command_line.rpath == NULL)
1271 lib_path = (const char *) getenv ("LD_RUN_PATH");
1272 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1276 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1277 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1281 if [ "x${USE_LIBPATH}" = xyes ] ; then
1284 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1285 for (; !found && rp != NULL; rp = rp->next)
1287 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1288 found = (rp->by == l->by
1289 && gld${EMULATION_NAME}_search_needed (tmpname,
1299 if [ "x${USE_LIBPATH}" = xyes ] ; then
1301 *-*-freebsd* | *-*-dragonfly*)
1303 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1309 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1311 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1320 len = strlen (l->name);
1321 for (search = search_head; search != NULL; search = search->next)
1325 if (search->cmdline)
1327 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1328 sprintf (filename, "%s/%s", search->name, l->name);
1330 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1343 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1353 /* Look through an expression for an assignment statement. */
1356 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1358 bfd_boolean provide = FALSE;
1360 switch (exp->type.node_class)
1363 case etree_provided:
1367 /* We call record_link_assignment even if the symbol is defined.
1368 This is because if it is defined by a dynamic object, we
1369 actually want to use the value defined by the linker script,
1370 not the value from the dynamic object (because we are setting
1371 symbols like etext). If the symbol is defined by a regular
1372 object, then, as it happens, calling record_link_assignment
1374 if (strcmp (exp->assign.dst, ".") != 0)
1376 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1378 exp->assign.dst, provide,
1379 exp->assign.hidden))
1380 einfo ("%P%F: failed to record assignment to %s: %E\n",
1383 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1387 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1388 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1392 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1393 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1394 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1398 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1407 /* This is called by the before_allocation routine via
1408 lang_for_each_statement. It locates any assignment statements, and
1409 tells the ELF backend about them, in case they are assignments to
1410 symbols which are referred to by dynamic objects. */
1413 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1415 if (s->header.type == lang_assignment_statement_enum)
1416 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1421 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1422 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1423 ELF_INTERPRETER_SET_DEFAULT="
1424 if (sinterp != NULL)
1426 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1427 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1432 ELF_INTERPRETER_SET_DEFAULT=
1436 /* used by before_allocation and handle_option. */
1438 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1441 *to = xstrdup (op_arg);
1444 size_t to_len = strlen (*to);
1445 size_t op_arg_len = strlen (op_arg);
1449 /* First see whether OPTARG is already in the path. */
1452 if (strncmp (op_arg, cp, op_arg_len) == 0
1453 && (cp[op_arg_len] == 0
1454 || cp[op_arg_len] == config.rpath_separator))
1458 /* Not yet found. */
1459 cp = strchr (cp, config.rpath_separator);
1467 buf = xmalloc (to_len + op_arg_len + 2);
1468 sprintf (buf, "%s%c%s", *to,
1469 config.rpath_separator, op_arg);
1476 /* This is called after the sections have been attached to output
1477 sections, but before any sizes or addresses have been set. */
1480 gld${EMULATION_NAME}_before_allocation (void)
1486 if (is_elf_hash_table (link_info.hash))
1488 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1490 /* Make __ehdr_start hidden if it has been referenced, to
1491 prevent the symbol from being dynamic. */
1492 if (!bfd_elf_record_link_assignment (link_info.output_bfd, &link_info,
1493 "__ehdr_start", TRUE, TRUE))
1494 einfo ("%P%F: failed to record assignment to %s: %E\n",
1497 /* If we are going to make any variable assignments, we need to
1498 let the ELF backend know about them in case the variables are
1499 referred to by dynamic objects. */
1500 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1503 /* Let the ELF backend work out the sizes of any sections required
1504 by dynamic linking. */
1505 rpath = command_line.rpath;
1507 rpath = (const char *) getenv ("LD_RUN_PATH");
1509 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1510 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1512 const char *audit_libs = elf_dt_audit (abfd);
1514 /* If the input bfd contains an audit entry, we need to add it as
1515 a dep audit entry. */
1516 if (audit_libs && *audit_libs != '\0')
1518 char *cp = xstrdup (audit_libs);
1522 char *cp2 = strchr (cp, config.rpath_separator);
1530 if (cp != NULL && *cp != '\0')
1531 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1533 cp = more ? ++cp2 : NULL;
1539 if (! (bfd_elf_size_dynamic_sections
1540 (link_info.output_bfd, command_line.soname, rpath,
1541 command_line.filter_shlib, audit, depaudit,
1542 (const char * const *) command_line.auxiliary_filters,
1543 &link_info, &sinterp)))
1544 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1546 ${ELF_INTERPRETER_SET_DEFAULT}
1547 /* Let the user override the dynamic linker we are using. */
1548 if (command_line.interpreter != NULL
1551 sinterp->contents = (bfd_byte *) command_line.interpreter;
1552 sinterp->size = strlen (command_line.interpreter) + 1;
1555 /* Look for any sections named .gnu.warning. As a GNU extensions,
1556 we treat such sections as containing warning messages. We print
1557 out the warning message, and then zero out the section size so
1558 that it does not get copied into the output file. */
1561 LANG_FOR_EACH_INPUT_STATEMENT (is)
1568 if (is->flags.just_syms)
1571 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1576 msg = (char *) xmalloc ((size_t) (sz + 1));
1577 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1579 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1582 ret = link_info.callbacks->warning (&link_info, msg,
1583 (const char *) NULL,
1584 is->the_bfd, (asection *) NULL,
1589 /* Clobber the section size, so that we don't waste space
1590 copying the warning into the output file. If we've already
1591 sized the output section, adjust its size. The adjustment
1592 is on rawsize because targets that size sections early will
1593 have called lang_reset_memory_regions after sizing. */
1594 if (s->output_section != NULL
1595 && s->output_section->rawsize >= s->size)
1596 s->output_section->rawsize -= s->size;
1600 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1601 warning section don't get copied to the output. */
1602 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1606 before_allocation_default ();
1608 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1609 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1615 if test x"$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 if (! entry->flags.maybe_archive)
1632 filename = entry->filename;
1634 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1635 is defined, but it does not seem worth the headache to optimize
1636 away those two bytes of space. */
1637 string = (char *) xmalloc (strlen (search->name)
1640 #ifdef EXTRA_SHLIB_EXTENSION
1641 + strlen (EXTRA_SHLIB_EXTENSION)
1643 + sizeof "/lib.so");
1645 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1647 #ifdef EXTRA_SHLIB_EXTENSION
1648 /* Try the .so extension first. If that fails build a new filename
1649 using EXTRA_SHLIB_EXTENSION. */
1650 if (! ldfile_try_open_bfd (string, entry))
1652 sprintf (string, "%s/lib%s%s%s", search->name,
1653 filename, arch, EXTRA_SHLIB_EXTENSION);
1656 if (! ldfile_try_open_bfd (string, entry))
1661 #ifdef EXTRA_SHLIB_EXTENSION
1665 entry->filename = string;
1667 /* We have found a dynamic object to include in the link. The ELF
1668 backend linker will create a DT_NEEDED entry in the .dynamic
1669 section naming this file. If this file includes a DT_SONAME
1670 entry, it will be used. Otherwise, the ELF linker will just use
1671 the name of the file. For an archive found by searching, like
1672 this one, the DT_NEEDED entry should consist of just the name of
1673 the file, without the path information used to find it. Note
1674 that we only need to do this if we have a dynamic object; an
1675 archive will never be referenced by a DT_NEEDED entry.
1677 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1678 very pretty. I haven't been able to think of anything that is
1680 if (bfd_check_format (entry->the_bfd, bfd_object)
1681 && (entry->the_bfd->flags & DYNAMIC) != 0)
1683 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1685 /* Rather than duplicating the logic above. Just use the
1686 filename we recorded earlier. */
1688 filename = lbasename (entry->filename);
1689 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1698 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1701 /* A variant of lang_output_section_find used by place_orphan. */
1703 static lang_output_section_statement_type *
1704 output_rel_find (asection *sec, int isdyn)
1706 lang_output_section_statement_type *lookup;
1707 lang_output_section_statement_type *last = NULL;
1708 lang_output_section_statement_type *last_alloc = NULL;
1709 lang_output_section_statement_type *last_ro_alloc = NULL;
1710 lang_output_section_statement_type *last_rel = NULL;
1711 lang_output_section_statement_type *last_rel_alloc = NULL;
1712 int rela = sec->name[4] == 'a';
1714 for (lookup = &lang_output_section_statement.head->output_section_statement;
1716 lookup = lookup->next)
1718 if (lookup->constraint >= 0
1719 && CONST_STRNEQ (lookup->name, ".rel"))
1721 int lookrela = lookup->name[4] == 'a';
1723 /* .rel.dyn must come before all other reloc sections, to suit
1728 /* Don't place after .rel.plt as doing so results in wrong
1730 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1733 if (rela == lookrela || last_rel == NULL)
1735 if ((rela == lookrela || last_rel_alloc == NULL)
1736 && lookup->bfd_section != NULL
1737 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1738 last_rel_alloc = lookup;
1742 if (lookup->bfd_section != NULL
1743 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1745 last_alloc = lookup;
1746 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1747 last_ro_alloc = lookup;
1752 return last_rel_alloc;
1758 return last_ro_alloc;
1766 /* Place an orphan section. We use this to put random SHF_ALLOC
1767 sections in the right segment. */
1769 static lang_output_section_statement_type *
1770 gld${EMULATION_NAME}_place_orphan (asection *s,
1771 const char *secname,
1774 static struct orphan_save hold[] =
1777 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1780 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1783 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1789 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1792 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1795 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1801 enum orphan_save_index
1812 static int orphan_init_done = 0;
1813 struct orphan_save *place;
1814 lang_output_section_statement_type *after;
1815 lang_output_section_statement_type *os;
1816 lang_output_section_statement_type *match_by_name = NULL;
1818 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1819 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1821 if (! link_info.relocatable
1822 && link_info.combreloc
1823 && (s->flags & SEC_ALLOC))
1829 secname = ".rela.dyn";
1833 secname = ".rel.dyn";
1839 else if (CONST_STRNEQ (secname, ".rel"))
1841 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1846 /* Look through the script to see where to place this section. */
1847 if (constraint == 0)
1848 for (os = lang_output_section_find (secname);
1850 os = next_matching_output_section_statement (os, 0))
1852 /* If we don't match an existing output section, tell
1853 lang_insert_orphan to create a new output section. */
1854 constraint = SPECIAL;
1856 if (os->bfd_section != NULL
1857 && (os->bfd_section->flags == 0
1858 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1861 && ((s->flags ^ os->bfd_section->flags)
1862 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1864 /* We already have an output section statement with this
1865 name, and its bfd section has compatible flags.
1866 If the section already exists but does not have any flags
1867 set, then it has been created by the linker, probably as a
1868 result of a --section-start command line switch. */
1869 lang_add_section (&os->children, s, NULL, os);
1873 /* Save unused output sections in case we can match them
1874 against orphans later. */
1875 if (os->bfd_section == NULL)
1879 /* If we didn't match an active output section, see if we matched an
1880 unused one and use that. */
1883 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1884 return match_by_name;
1887 if (!orphan_init_done)
1889 struct orphan_save *ho;
1891 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1892 if (ho->name != NULL)
1894 ho->os = lang_output_section_find (ho->name);
1895 if (ho->os != NULL && ho->os->flags == 0)
1896 ho->os->flags = ho->flags;
1898 orphan_init_done = 1;
1901 /* If this is a final link, then always put .gnu.warning.SYMBOL
1902 sections into the .text section to get them out of the way. */
1903 if (link_info.executable
1904 && ! link_info.relocatable
1905 && CONST_STRNEQ (s->name, ".gnu.warning.")
1906 && hold[orphan_text].os != NULL)
1908 os = hold[orphan_text].os;
1909 lang_add_section (&os->children, s, NULL, os);
1913 /* Decide which segment the section should go in based on the
1914 section name and section flags. We put loadable .note sections
1915 right after the .interp section, so that the PT_NOTE segment is
1916 stored right after the program headers where the OS can read it
1917 in the first page. */
1920 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1921 place = &hold[orphan_nonalloc];
1922 else if ((s->flags & SEC_ALLOC) == 0)
1924 else if ((s->flags & SEC_LOAD) != 0
1925 && ((iself && sh_type == SHT_NOTE)
1926 || (!iself && CONST_STRNEQ (secname, ".note"))))
1927 place = &hold[orphan_interp];
1928 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1929 place = &hold[orphan_bss];
1930 else if ((s->flags & SEC_SMALL_DATA) != 0)
1931 place = &hold[orphan_sdata];
1932 else if ((s->flags & SEC_READONLY) == 0)
1933 place = &hold[orphan_data];
1934 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1935 || (!iself && CONST_STRNEQ (secname, ".rel")))
1936 && (s->flags & SEC_LOAD) != 0)
1937 place = &hold[orphan_rel];
1938 else if ((s->flags & SEC_CODE) == 0)
1939 place = &hold[orphan_rodata];
1941 place = &hold[orphan_text];
1946 if (place->os == NULL)
1948 if (place->name != NULL)
1949 place->os = lang_output_section_find (place->name);
1951 place->os = output_rel_find (s, isdyn);
1955 after = lang_output_section_find_by_flags
1956 (s, &place->os, _bfd_elf_match_sections_by_type);
1958 /* *ABS* is always the first output section statement. */
1959 after = &lang_output_section_statement.head->output_section_statement;
1962 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1967 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1971 gld${EMULATION_NAME}_after_allocation (void)
1973 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1975 gld${EMULATION_NAME}_map_segments (need_layout);
1980 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1984 gld${EMULATION_NAME}_get_script (int *isfile)
1987 if test -n "$COMPILE_IN"
1989 # Scripts compiled in.
1991 # sed commands to quote an ld script as a C string.
1992 sc="-f stringify.sed"
1998 if (link_info.relocatable && config.build_constructors)
2001 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
2002 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
2003 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2004 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2005 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2006 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2007 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2008 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2010 if test -n "$GENERATE_PIE_SCRIPT" ; then
2011 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2012 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2013 echo ' && 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}.xdw >> e${EMULATION_NAME}.c
2016 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2017 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2019 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2020 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2022 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2023 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2024 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2025 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2026 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2027 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2028 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2029 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2031 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2032 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2034 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2035 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2036 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2037 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2038 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2039 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2041 echo ' ; else return' >> e${EMULATION_NAME}.c
2042 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2043 echo '; }' >> e${EMULATION_NAME}.c
2046 # Scripts read from the filesystem.
2052 if (link_info.relocatable && config.build_constructors)
2053 return "ldscripts/${EMULATION_NAME}.xu";
2054 else if (link_info.relocatable)
2055 return "ldscripts/${EMULATION_NAME}.xr";
2056 else if (!config.text_read_only)
2057 return "ldscripts/${EMULATION_NAME}.xbn";
2059 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2062 else if (!config.magic_demand_paged)
2063 return "ldscripts/${EMULATION_NAME}.xn";
2066 if test -n "$GENERATE_PIE_SCRIPT" ; then
2067 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2069 else if (link_info.pie && link_info.combreloc
2070 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2071 return "ldscripts/${EMULATION_NAME}.xdw";
2072 else if (link_info.pie && link_info.combreloc)
2073 return "ldscripts/${EMULATION_NAME}.xdc";
2077 else if (link_info.pie)
2078 return "ldscripts/${EMULATION_NAME}.xd";
2081 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2082 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2084 else if (link_info.shared && link_info.combreloc
2085 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2086 return "ldscripts/${EMULATION_NAME}.xsw";
2087 else if (link_info.shared && link_info.combreloc)
2088 return "ldscripts/${EMULATION_NAME}.xsc";
2092 else if (link_info.shared)
2093 return "ldscripts/${EMULATION_NAME}.xs";
2096 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2098 else if (link_info.combreloc && link_info.relro
2099 && (link_info.flags & DF_BIND_NOW))
2100 return "ldscripts/${EMULATION_NAME}.xw";
2101 else if (link_info.combreloc)
2102 return "ldscripts/${EMULATION_NAME}.xc";
2107 return "ldscripts/${EMULATION_NAME}.x";
2114 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2116 $PARSE_AND_LIST_PROLOGUE
2122 #define OPTION_DISABLE_NEW_DTAGS (400)
2123 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2124 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2125 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2126 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2127 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2128 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2129 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2132 gld${EMULATION_NAME}_add_options
2133 (int ns, char **shortopts, int nl, struct option **longopts,
2134 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2137 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2139 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2143 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2147 static const struct option xtra_long[] = {
2149 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2151 {"audit", required_argument, NULL, OPTION_AUDIT},
2152 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2156 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2158 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2160 {"depaudit", required_argument, NULL, 'P'},
2161 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2162 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2163 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2164 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2165 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2168 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2170 $PARSE_AND_LIST_LONGOPTS
2174 {NULL, no_argument, NULL, 0}
2177 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2178 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2179 *longopts = (struct option *)
2180 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2181 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2184 #define DEFAULT_BUILD_ID_STYLE "sha1"
2187 gld${EMULATION_NAME}_handle_option (int optc)
2194 case OPTION_BUILD_ID:
2195 if (emit_note_gnu_build_id != NULL)
2197 free ((char *) emit_note_gnu_build_id);
2198 emit_note_gnu_build_id = NULL;
2201 optarg = DEFAULT_BUILD_ID_STYLE;
2202 if (strcmp (optarg, "none"))
2203 emit_note_gnu_build_id = xstrdup (optarg);
2208 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2211 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2215 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2218 case OPTION_DISABLE_NEW_DTAGS:
2219 link_info.new_dtags = FALSE;
2222 case OPTION_ENABLE_NEW_DTAGS:
2223 link_info.new_dtags = TRUE;
2226 case OPTION_EH_FRAME_HDR:
2227 link_info.eh_frame_hdr = TRUE;
2231 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2232 /* Groups must be self-contained. */
2233 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2234 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2237 case OPTION_EXCLUDE_LIBS:
2238 add_excluded_libs (optarg);
2241 case OPTION_HASH_STYLE:
2242 link_info.emit_hash = FALSE;
2243 link_info.emit_gnu_hash = FALSE;
2244 if (strcmp (optarg, "sysv") == 0)
2245 link_info.emit_hash = TRUE;
2246 else if (strcmp (optarg, "gnu") == 0)
2247 link_info.emit_gnu_hash = TRUE;
2248 else if (strcmp (optarg, "both") == 0)
2250 link_info.emit_hash = TRUE;
2251 link_info.emit_gnu_hash = TRUE;
2254 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2261 if (strcmp (optarg, "defs") == 0)
2262 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2263 else if (strcmp (optarg, "muldefs") == 0)
2264 link_info.allow_multiple_definition = TRUE;
2265 else if (CONST_STRNEQ (optarg, "max-page-size="))
2269 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2270 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2271 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2274 else if (CONST_STRNEQ (optarg, "common-page-size="))
2277 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2279 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2280 einfo (_("%P%F: invalid common page size \`%s'\n"),
2283 else if (CONST_STRNEQ (optarg, "stack-size="))
2286 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2287 if (*end || link_info.stacksize < 0)
2288 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2289 if (!link_info.stacksize)
2290 /* Use -1 for explicit no-stack, because zero means
2292 link_info.stacksize = -1;
2294 else if (strcmp (optarg, "execstack") == 0)
2296 link_info.execstack = TRUE;
2297 link_info.noexecstack = FALSE;
2299 else if (strcmp (optarg, "noexecstack") == 0)
2301 link_info.noexecstack = TRUE;
2302 link_info.execstack = FALSE;
2305 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2307 else if (strcmp (optarg, "global") == 0)
2308 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2309 else if (strcmp (optarg, "initfirst") == 0)
2310 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2311 else if (strcmp (optarg, "interpose") == 0)
2312 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2313 else if (strcmp (optarg, "loadfltr") == 0)
2314 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2315 else if (strcmp (optarg, "nodefaultlib") == 0)
2316 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2317 else if (strcmp (optarg, "nodelete") == 0)
2318 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2319 else if (strcmp (optarg, "nodlopen") == 0)
2320 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2321 else if (strcmp (optarg, "nodump") == 0)
2322 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2323 else if (strcmp (optarg, "now") == 0)
2325 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2326 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2328 else if (strcmp (optarg, "lazy") == 0)
2330 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2331 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2333 else if (strcmp (optarg, "origin") == 0)
2335 link_info.flags |= (bfd_vma) DF_ORIGIN;
2336 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2338 else if (strcmp (optarg, "combreloc") == 0)
2339 link_info.combreloc = TRUE;
2340 else if (strcmp (optarg, "nocombreloc") == 0)
2341 link_info.combreloc = FALSE;
2342 else if (strcmp (optarg, "nocopyreloc") == 0)
2343 link_info.nocopyreloc = TRUE;
2344 else if (strcmp (optarg, "relro") == 0)
2345 link_info.relro = TRUE;
2346 else if (strcmp (optarg, "norelro") == 0)
2347 link_info.relro = FALSE;
2348 else if (strcmp (optarg, "text") == 0)
2349 link_info.error_textrel = TRUE;
2350 else if (strcmp (optarg, "notext") == 0)
2351 link_info.error_textrel = FALSE;
2352 else if (strcmp (optarg, "textoff") == 0)
2353 link_info.error_textrel = FALSE;
2359 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2363 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2365 $PARSE_AND_LIST_ARGS_CASES
2377 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2381 gld${EMULATION_NAME}_list_options (FILE * file)
2384 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2387 --audit=AUDITLIB Specify a library to use for auditing\n"));
2389 -Bgroup Selects group name lookup rules for DSO\n"));
2394 --build-id[=STYLE] Generate build ID note\n"));
2396 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2399 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2400 Specify a library to use for auditing dependencies\n"));
2402 --disable-new-dtags Disable new dynamic tags\n"));
2404 --enable-new-dtags Enable new dynamic tags\n"));
2406 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2408 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2410 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2412 -z combreloc Merge dynamic relocs into one section and sort\n"));
2418 -z common-page-size=SIZE Set common page size to SIZE\n"));
2420 -z defs Report unresolved symbols in object files.\n"));
2422 -z execstack Mark executable as requiring executable stack\n"));
2425 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2428 -z global Make symbols in DSO available for subsequently\n\
2429 loaded objects\n"));
2431 -z initfirst Mark DSO to be initialized first at runtime\n"));
2433 -z interpose Mark object to interpose all DSOs but executable\n"));
2435 -z lazy Mark object lazy runtime binding (default)\n"));
2437 -z loadfltr Mark object requiring immediate process\n"));
2443 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2445 -z muldefs Allow multiple definitions\n"));
2448 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2451 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2453 -z nocopyreloc Don't create copy relocs\n"));
2455 -z nodefaultlib Mark object not to use default search paths\n"));
2457 -z nodelete Mark DSO non-deletable at runtime\n"));
2459 -z nodlopen Mark DSO not available to dlopen\n"));
2461 -z nodump Mark DSO not available to dldump\n"));
2466 -z noexecstack Mark executable as not requiring executable stack\n"));
2468 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2471 -z norelro Don't create RELRO program header\n"));
2473 -z now Mark object non-lazy runtime binding\n"));
2475 -z origin Mark object requiring immediate \$ORIGIN\n\
2476 processing at runtime\n"));
2478 -z relro Create RELRO program header\n"));
2480 -z stacksize=SIZE Set size of stack segment\n"));
2484 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2486 $PARSE_AND_LIST_OPTIONS
2494 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2496 $PARSE_AND_LIST_EPILOGUE
2503 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2505 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2506 ${LDEMUL_SYSLIB-syslib_default},
2507 ${LDEMUL_HLL-hll_default},
2508 ${LDEMUL_AFTER_PARSE-after_parse_default},
2509 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2510 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2511 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2512 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2513 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2514 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2515 "${EMULATION_NAME}",
2517 ${LDEMUL_FINISH-finish_default},
2518 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2519 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2520 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2521 ${LDEMUL_SET_SYMBOLS-NULL},
2522 ${LDEMUL_PARSE_ARGS-NULL},
2523 gld${EMULATION_NAME}_add_options,
2524 gld${EMULATION_NAME}_handle_option,
2525 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2526 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2527 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2528 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2529 ${LDEMUL_NEW_VERS_PATTERN-NULL}