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${EMULATION_NAME}_stat_needed);
424 if (global_found != NULL)
426 /* Return TRUE to indicate that we found the file, even though
427 we aren't going to do anything with it. */
431 /* Specify the soname to use. */
432 bfd_elf_set_dt_needed_name (abfd, soname);
434 /* Tell the ELF linker that we don't want the output file to have a
435 DT_NEEDED entry for this file, unless it is used to resolve
436 references in a regular object. */
437 link_class = DYN_DT_NEEDED;
439 /* Tell the ELF linker that we don't want the output file to have a
440 DT_NEEDED entry for this file at all if the entry is from a file
441 with DYN_NO_ADD_NEEDED. */
442 if (needed->by != NULL
443 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
444 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
446 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
448 /* Add this file into the symbol table. */
449 if (! bfd_link_add_symbols (abfd, &link_info))
450 einfo ("%F%B: could not read symbols: %E\n", abfd);
456 /* Search for a needed file in a path. */
459 gld${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->build_id->u.o.style;
964 asec = t->build_id->u.o.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->build_id = bfd_alloc (link_info.output_bfd, sizeof (t->build_id->u.o));
1072 if (t->build_id != NULL)
1074 t->build_id->u.o.zero = 0;
1075 t->build_id->u.o.after_write_object_contents = &write_build_id;
1076 t->build_id->u.o.style = emit_note_gnu_build_id;
1077 t->build_id->u.o.sec = s;
1078 elf_section_type (s) = SHT_NOTE;
1084 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1085 " --build-id ignored.\n");
1089 /* This is called after all the input files have been opened. */
1092 gld${EMULATION_NAME}_after_open (void)
1094 struct bfd_link_needed_list *needed, *l;
1095 struct elf_link_hash_table *htab;
1097 after_open_default ();
1099 htab = elf_hash_table (&link_info);
1100 if (!is_elf_hash_table (htab))
1103 if (emit_note_gnu_build_id != NULL)
1107 /* Find an ELF input. */
1108 for (abfd = link_info.input_bfds;
1109 abfd != (bfd *) NULL; abfd = abfd->link_next)
1110 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1113 /* PR 10555: If there are no ELF input files do not try to
1114 create a .note.gnu-build-id section. */
1116 || !setup_build_id (abfd))
1118 free ((char *) emit_note_gnu_build_id);
1119 emit_note_gnu_build_id = NULL;
1123 if (link_info.relocatable)
1126 if (link_info.eh_frame_hdr
1127 && !link_info.traditional_format)
1129 bfd *abfd, *elfbfd = NULL;
1130 bfd_boolean warn_eh_frame = FALSE;
1133 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1135 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1139 s = bfd_get_section_by_name (abfd, ".eh_frame");
1142 || bfd_is_abs_section (s->output_section)))
1143 s = bfd_get_next_section_by_name (s);
1144 warn_eh_frame = s != NULL;
1146 if (elfbfd && warn_eh_frame)
1151 const struct elf_backend_data *bed;
1153 bed = get_elf_backend_data (elfbfd);
1154 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1155 bed->dynamic_sec_flags
1158 && bfd_set_section_alignment (elfbfd, s, 2))
1160 htab->eh_info.hdr_sec = s;
1161 warn_eh_frame = FALSE;
1165 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1166 " --eh-frame-hdr ignored.\n");
1169 /* Get the list of files which appear in DT_NEEDED entries in
1170 dynamic objects included in the link (often there will be none).
1171 For each such file, we want to track down the corresponding
1172 library, and include the symbol table in the link. This is what
1173 the runtime dynamic linker will do. Tracking the files down here
1174 permits one dynamic object to include another without requiring
1175 special action by the person doing the link. Note that the
1176 needed list can actually grow while we are stepping through this
1178 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1179 for (l = needed; l != NULL; l = l->next)
1181 struct bfd_link_needed_list *ll;
1182 struct dt_needed n, nn;
1185 /* If the lib that needs this one was --as-needed and wasn't
1186 found to be needed, then this lib isn't needed either. Skip
1187 the lib when creating a shared object unless we are copying
1188 DT_NEEDED entres. */
1190 && ((bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0
1191 || (!link_info.executable
1192 && bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0))
1195 /* If we've already seen this file, skip it. */
1196 for (ll = needed; ll != l; ll = ll->next)
1198 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1199 && strcmp (ll->name, l->name) == 0)
1204 /* See if this file was included in the link explicitly. */
1206 global_found = NULL;
1207 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1208 if (global_found != NULL
1209 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1210 & DYN_AS_NEEDED) == 0)
1217 info_msg (_("%s needed by %B\n"), l->name, l->by);
1219 /* As-needed libs specified on the command line (or linker script)
1220 take priority over libs found in search dirs. */
1221 if (global_found != NULL)
1223 nn.name = global_found->filename;
1224 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1228 /* We need to find this file and include the symbol table. We
1229 want to search for the file in the same way that the dynamic
1230 linker will search. That means that we want to use
1231 rpath_link, rpath, then the environment variable
1232 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1233 entries (native only), then the linker script LIB_SEARCH_DIRS.
1234 We do not search using the -L arguments.
1236 We search twice. The first time, we skip objects which may
1237 introduce version mismatches. The second time, we force
1238 their use. See gld${EMULATION_NAME}_vercheck comment. */
1239 for (force = 0; force < 2; force++)
1242 search_dirs_type *search;
1244 if [ "x${NATIVE}" = xyes ] ; then
1246 const char *lib_path;
1249 if [ "x${USE_LIBPATH}" = xyes ] ; then
1251 struct bfd_link_needed_list *rp;
1257 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1261 if [ "x${USE_LIBPATH}" = xyes ] ; then
1263 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1268 if [ "x${NATIVE}" = xyes ] ; then
1270 if (command_line.rpath_link == NULL
1271 && command_line.rpath == NULL)
1273 lib_path = (const char *) getenv ("LD_RUN_PATH");
1274 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1278 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1279 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1283 if [ "x${USE_LIBPATH}" = xyes ] ; then
1286 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1287 for (; !found && rp != NULL; rp = rp->next)
1289 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1290 found = (rp->by == l->by
1291 && gld${EMULATION_NAME}_search_needed (tmpname,
1301 if [ "x${USE_LIBPATH}" = xyes ] ; then
1303 *-*-freebsd* | *-*-dragonfly*)
1305 if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force))
1311 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1313 if (gld${EMULATION_NAME}_check_ld_so_conf (l, force))
1322 len = strlen (l->name);
1323 for (search = search_head; search != NULL; search = search->next)
1327 if (search->cmdline)
1329 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1330 sprintf (filename, "%s/%s", search->name, l->name);
1332 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1345 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1355 /* Look through an expression for an assignment statement. */
1358 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1360 bfd_boolean provide = FALSE;
1362 switch (exp->type.node_class)
1365 case etree_provided:
1369 /* We call record_link_assignment even if the symbol is defined.
1370 This is because if it is defined by a dynamic object, we
1371 actually want to use the value defined by the linker script,
1372 not the value from the dynamic object (because we are setting
1373 symbols like etext). If the symbol is defined by a regular
1374 object, then, as it happens, calling record_link_assignment
1376 if (strcmp (exp->assign.dst, ".") != 0)
1378 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1380 exp->assign.dst, provide,
1381 exp->assign.hidden))
1382 einfo ("%P%F: failed to record assignment to %s: %E\n",
1385 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1389 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1390 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1394 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1395 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1396 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1400 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1409 /* This is called by the before_allocation routine via
1410 lang_for_each_statement. It locates any assignment statements, and
1411 tells the ELF backend about them, in case they are assignments to
1412 symbols which are referred to by dynamic objects. */
1415 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1417 if (s->header.type == lang_assignment_statement_enum)
1418 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1423 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1424 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1425 ELF_INTERPRETER_SET_DEFAULT="
1426 if (sinterp != NULL)
1428 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1429 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1434 ELF_INTERPRETER_SET_DEFAULT=
1438 /* used by before_allocation and handle_option. */
1440 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1443 *to = xstrdup (op_arg);
1446 size_t to_len = strlen (*to);
1447 size_t op_arg_len = strlen (op_arg);
1451 /* First see whether OPTARG is already in the path. */
1454 if (strncmp (op_arg, cp, op_arg_len) == 0
1455 && (cp[op_arg_len] == 0
1456 || cp[op_arg_len] == config.rpath_separator))
1460 /* Not yet found. */
1461 cp = strchr (cp, config.rpath_separator);
1469 buf = xmalloc (to_len + op_arg_len + 2);
1470 sprintf (buf, "%s%c%s", *to,
1471 config.rpath_separator, op_arg);
1478 /* This is called after the sections have been attached to output
1479 sections, but before any sizes or addresses have been set. */
1482 gld${EMULATION_NAME}_before_allocation (void)
1488 if (link_info.hash->type == bfd_link_elf_hash_table)
1489 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1491 /* If we are going to make any variable assignments, we need to let
1492 the ELF backend know about them in case the variables are
1493 referred to by dynamic objects. */
1494 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1496 /* Let the ELF backend work out the sizes of any sections required
1497 by dynamic linking. */
1498 rpath = command_line.rpath;
1500 rpath = (const char *) getenv ("LD_RUN_PATH");
1502 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1503 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1505 const char *audit_libs = elf_dt_audit (abfd);
1507 /* If the input bfd contains an audit entry, we need to add it as
1508 a dep audit entry. */
1509 if (audit_libs && *audit_libs != '\0')
1511 char *cp = xstrdup (audit_libs);
1515 char *cp2 = strchr (cp, config.rpath_separator);
1523 if (cp != NULL && *cp != '\0')
1524 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1526 cp = more ? ++cp2 : NULL;
1532 if (! (bfd_elf_size_dynamic_sections
1533 (link_info.output_bfd, command_line.soname, rpath,
1534 command_line.filter_shlib, audit, depaudit,
1535 (const char * const *) command_line.auxiliary_filters,
1536 &link_info, &sinterp)))
1537 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1539 ${ELF_INTERPRETER_SET_DEFAULT}
1540 /* Let the user override the dynamic linker we are using. */
1541 if (command_line.interpreter != NULL
1544 sinterp->contents = (bfd_byte *) command_line.interpreter;
1545 sinterp->size = strlen (command_line.interpreter) + 1;
1548 /* Look for any sections named .gnu.warning. As a GNU extensions,
1549 we treat such sections as containing warning messages. We print
1550 out the warning message, and then zero out the section size so
1551 that it does not get copied into the output file. */
1554 LANG_FOR_EACH_INPUT_STATEMENT (is)
1561 if (is->flags.just_syms)
1564 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1569 msg = (char *) xmalloc ((size_t) (sz + 1));
1570 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1572 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1575 ret = link_info.callbacks->warning (&link_info, msg,
1576 (const char *) NULL,
1577 is->the_bfd, (asection *) NULL,
1582 /* Clobber the section size, so that we don't waste space
1583 copying the warning into the output file. If we've already
1584 sized the output section, adjust its size. The adjustment
1585 is on rawsize because targets that size sections early will
1586 have called lang_reset_memory_regions after sizing. */
1587 if (s->output_section != NULL
1588 && s->output_section->rawsize >= s->size)
1589 s->output_section->rawsize -= s->size;
1593 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1594 warning section don't get copied to the output. */
1595 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1599 before_allocation_default ();
1601 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1602 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1608 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1611 /* Try to open a dynamic archive. This is where we know that ELF
1612 dynamic libraries have an extension of .so (or .sl on oddball systems
1616 gld${EMULATION_NAME}_open_dynamic_archive
1617 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1619 const char *filename;
1622 if (! entry->flags.maybe_archive)
1625 filename = entry->filename;
1627 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1628 is defined, but it does not seem worth the headache to optimize
1629 away those two bytes of space. */
1630 string = (char *) xmalloc (strlen (search->name)
1633 #ifdef EXTRA_SHLIB_EXTENSION
1634 + strlen (EXTRA_SHLIB_EXTENSION)
1636 + sizeof "/lib.so");
1638 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1640 #ifdef EXTRA_SHLIB_EXTENSION
1641 /* Try the .so extension first. If that fails build a new filename
1642 using EXTRA_SHLIB_EXTENSION. */
1643 if (! ldfile_try_open_bfd (string, entry))
1645 sprintf (string, "%s/lib%s%s%s", search->name,
1646 filename, arch, EXTRA_SHLIB_EXTENSION);
1649 if (! ldfile_try_open_bfd (string, entry))
1654 #ifdef EXTRA_SHLIB_EXTENSION
1658 entry->filename = string;
1660 /* We have found a dynamic object to include in the link. The ELF
1661 backend linker will create a DT_NEEDED entry in the .dynamic
1662 section naming this file. If this file includes a DT_SONAME
1663 entry, it will be used. Otherwise, the ELF linker will just use
1664 the name of the file. For an archive found by searching, like
1665 this one, the DT_NEEDED entry should consist of just the name of
1666 the file, without the path information used to find it. Note
1667 that we only need to do this if we have a dynamic object; an
1668 archive will never be referenced by a DT_NEEDED entry.
1670 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1671 very pretty. I haven't been able to think of anything that is
1673 if (bfd_check_format (entry->the_bfd, bfd_object)
1674 && (entry->the_bfd->flags & DYNAMIC) != 0)
1676 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1678 /* Rather than duplicating the logic above. Just use the
1679 filename we recorded earlier. */
1681 filename = lbasename (entry->filename);
1682 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1691 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1694 /* A variant of lang_output_section_find used by place_orphan. */
1696 static lang_output_section_statement_type *
1697 output_rel_find (asection *sec, int isdyn)
1699 lang_output_section_statement_type *lookup;
1700 lang_output_section_statement_type *last = NULL;
1701 lang_output_section_statement_type *last_alloc = NULL;
1702 lang_output_section_statement_type *last_ro_alloc = NULL;
1703 lang_output_section_statement_type *last_rel = NULL;
1704 lang_output_section_statement_type *last_rel_alloc = NULL;
1705 int rela = sec->name[4] == 'a';
1707 for (lookup = &lang_output_section_statement.head->output_section_statement;
1709 lookup = lookup->next)
1711 if (lookup->constraint >= 0
1712 && CONST_STRNEQ (lookup->name, ".rel"))
1714 int lookrela = lookup->name[4] == 'a';
1716 /* .rel.dyn must come before all other reloc sections, to suit
1721 /* Don't place after .rel.plt as doing so results in wrong
1723 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1726 if (rela == lookrela || last_rel == NULL)
1728 if ((rela == lookrela || last_rel_alloc == NULL)
1729 && lookup->bfd_section != NULL
1730 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1731 last_rel_alloc = lookup;
1735 if (lookup->bfd_section != NULL
1736 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1738 last_alloc = lookup;
1739 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1740 last_ro_alloc = lookup;
1745 return last_rel_alloc;
1751 return last_ro_alloc;
1759 /* Place an orphan section. We use this to put random SHF_ALLOC
1760 sections in the right segment. */
1762 static lang_output_section_statement_type *
1763 gld${EMULATION_NAME}_place_orphan (asection *s,
1764 const char *secname,
1767 static struct orphan_save hold[] =
1770 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1773 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1776 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1782 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1785 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1788 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1794 enum orphan_save_index
1805 static int orphan_init_done = 0;
1806 struct orphan_save *place;
1807 lang_output_section_statement_type *after;
1808 lang_output_section_statement_type *os;
1809 lang_output_section_statement_type *match_by_name = NULL;
1811 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1812 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1814 if (! link_info.relocatable
1815 && link_info.combreloc
1816 && (s->flags & SEC_ALLOC))
1822 secname = ".rela.dyn";
1826 secname = ".rel.dyn";
1832 else if (CONST_STRNEQ (secname, ".rel"))
1834 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1839 /* Look through the script to see where to place this section. */
1840 if (constraint == 0)
1841 for (os = lang_output_section_find (secname);
1843 os = next_matching_output_section_statement (os, 0))
1845 /* If we don't match an existing output section, tell
1846 lang_insert_orphan to create a new output section. */
1847 constraint = SPECIAL;
1849 if (os->bfd_section != NULL
1850 && (os->bfd_section->flags == 0
1851 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1854 && ((s->flags ^ os->bfd_section->flags)
1855 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1857 /* We already have an output section statement with this
1858 name, and its bfd section has compatible flags.
1859 If the section already exists but does not have any flags
1860 set, then it has been created by the linker, probably as a
1861 result of a --section-start command line switch. */
1862 lang_add_section (&os->children, s, NULL, os);
1866 /* Save unused output sections in case we can match them
1867 against orphans later. */
1868 if (os->bfd_section == NULL)
1872 /* If we didn't match an active output section, see if we matched an
1873 unused one and use that. */
1876 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1877 return match_by_name;
1880 if (!orphan_init_done)
1882 struct orphan_save *ho;
1884 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1885 if (ho->name != NULL)
1887 ho->os = lang_output_section_find (ho->name);
1888 if (ho->os != NULL && ho->os->flags == 0)
1889 ho->os->flags = ho->flags;
1891 orphan_init_done = 1;
1894 /* If this is a final link, then always put .gnu.warning.SYMBOL
1895 sections into the .text section to get them out of the way. */
1896 if (link_info.executable
1897 && ! link_info.relocatable
1898 && CONST_STRNEQ (s->name, ".gnu.warning.")
1899 && hold[orphan_text].os != NULL)
1901 os = hold[orphan_text].os;
1902 lang_add_section (&os->children, s, NULL, os);
1906 /* Decide which segment the section should go in based on the
1907 section name and section flags. We put loadable .note sections
1908 right after the .interp section, so that the PT_NOTE segment is
1909 stored right after the program headers where the OS can read it
1910 in the first page. */
1913 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1914 place = &hold[orphan_nonalloc];
1915 else if ((s->flags & SEC_ALLOC) == 0)
1917 else if ((s->flags & SEC_LOAD) != 0
1918 && ((iself && sh_type == SHT_NOTE)
1919 || (!iself && CONST_STRNEQ (secname, ".note"))))
1920 place = &hold[orphan_interp];
1921 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1922 place = &hold[orphan_bss];
1923 else if ((s->flags & SEC_SMALL_DATA) != 0)
1924 place = &hold[orphan_sdata];
1925 else if ((s->flags & SEC_READONLY) == 0)
1926 place = &hold[orphan_data];
1927 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1928 || (!iself && CONST_STRNEQ (secname, ".rel")))
1929 && (s->flags & SEC_LOAD) != 0)
1930 place = &hold[orphan_rel];
1931 else if ((s->flags & SEC_CODE) == 0)
1932 place = &hold[orphan_rodata];
1934 place = &hold[orphan_text];
1939 if (place->os == NULL)
1941 if (place->name != NULL)
1942 place->os = lang_output_section_find (place->name);
1944 place->os = output_rel_find (s, isdyn);
1948 after = lang_output_section_find_by_flags
1949 (s, &place->os, _bfd_elf_match_sections_by_type);
1951 /* *ABS* is always the first output section statement. */
1952 after = &lang_output_section_statement.head->output_section_statement;
1955 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1960 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1964 gld${EMULATION_NAME}_after_allocation (void)
1966 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1968 gld${EMULATION_NAME}_map_segments (need_layout);
1973 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1977 gld${EMULATION_NAME}_get_script (int *isfile)
1980 if test -n "$COMPILE_IN"
1982 # Scripts compiled in.
1984 # sed commands to quote an ld script as a C string.
1985 sc="-f stringify.sed"
1991 if (link_info.relocatable && config.build_constructors)
1994 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1995 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1996 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1997 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1998 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1999 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2000 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2001 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2003 if test -n "$GENERATE_PIE_SCRIPT" ; then
2004 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2005 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2006 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2007 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2008 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2009 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2010 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2012 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2013 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2015 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2016 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2017 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2018 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2019 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2020 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2021 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2022 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2024 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2025 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2027 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2028 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2029 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2030 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2031 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2032 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2034 echo ' ; else return' >> e${EMULATION_NAME}.c
2035 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2036 echo '; }' >> e${EMULATION_NAME}.c
2039 # Scripts read from the filesystem.
2045 if (link_info.relocatable && config.build_constructors)
2046 return "ldscripts/${EMULATION_NAME}.xu";
2047 else if (link_info.relocatable)
2048 return "ldscripts/${EMULATION_NAME}.xr";
2049 else if (!config.text_read_only)
2050 return "ldscripts/${EMULATION_NAME}.xbn";
2052 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2055 else if (!config.magic_demand_paged)
2056 return "ldscripts/${EMULATION_NAME}.xn";
2059 if test -n "$GENERATE_PIE_SCRIPT" ; then
2060 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2062 else if (link_info.pie && link_info.combreloc
2063 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2064 return "ldscripts/${EMULATION_NAME}.xdw";
2065 else if (link_info.pie && link_info.combreloc)
2066 return "ldscripts/${EMULATION_NAME}.xdc";
2070 else if (link_info.pie)
2071 return "ldscripts/${EMULATION_NAME}.xd";
2074 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2075 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2077 else if (link_info.shared && link_info.combreloc
2078 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2079 return "ldscripts/${EMULATION_NAME}.xsw";
2080 else if (link_info.shared && link_info.combreloc)
2081 return "ldscripts/${EMULATION_NAME}.xsc";
2085 else if (link_info.shared)
2086 return "ldscripts/${EMULATION_NAME}.xs";
2089 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2091 else if (link_info.combreloc && link_info.relro
2092 && (link_info.flags & DF_BIND_NOW))
2093 return "ldscripts/${EMULATION_NAME}.xw";
2094 else if (link_info.combreloc)
2095 return "ldscripts/${EMULATION_NAME}.xc";
2100 return "ldscripts/${EMULATION_NAME}.x";
2107 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2109 $PARSE_AND_LIST_PROLOGUE
2115 #define OPTION_DISABLE_NEW_DTAGS (400)
2116 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2117 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2118 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2119 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2120 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2121 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2122 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2125 gld${EMULATION_NAME}_add_options
2126 (int ns, char **shortopts, int nl, struct option **longopts,
2127 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2130 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2132 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2136 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2140 static const struct option xtra_long[] = {
2142 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2144 {"audit", required_argument, NULL, OPTION_AUDIT},
2145 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2149 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2151 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2153 {"depaudit", required_argument, NULL, 'P'},
2154 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2155 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2156 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2157 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2158 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2161 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2163 $PARSE_AND_LIST_LONGOPTS
2167 {NULL, no_argument, NULL, 0}
2170 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2171 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2172 *longopts = (struct option *)
2173 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2174 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2177 #define DEFAULT_BUILD_ID_STYLE "sha1"
2180 gld${EMULATION_NAME}_handle_option (int optc)
2187 case OPTION_BUILD_ID:
2188 if (emit_note_gnu_build_id != NULL)
2190 free ((char *) emit_note_gnu_build_id);
2191 emit_note_gnu_build_id = NULL;
2194 optarg = DEFAULT_BUILD_ID_STYLE;
2195 if (strcmp (optarg, "none"))
2196 emit_note_gnu_build_id = xstrdup (optarg);
2201 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2204 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2208 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2211 case OPTION_DISABLE_NEW_DTAGS:
2212 link_info.new_dtags = FALSE;
2215 case OPTION_ENABLE_NEW_DTAGS:
2216 link_info.new_dtags = TRUE;
2219 case OPTION_EH_FRAME_HDR:
2220 link_info.eh_frame_hdr = TRUE;
2224 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2225 /* Groups must be self-contained. */
2226 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2227 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2230 case OPTION_EXCLUDE_LIBS:
2231 add_excluded_libs (optarg);
2234 case OPTION_HASH_STYLE:
2235 link_info.emit_hash = FALSE;
2236 link_info.emit_gnu_hash = FALSE;
2237 if (strcmp (optarg, "sysv") == 0)
2238 link_info.emit_hash = TRUE;
2239 else if (strcmp (optarg, "gnu") == 0)
2240 link_info.emit_gnu_hash = TRUE;
2241 else if (strcmp (optarg, "both") == 0)
2243 link_info.emit_hash = TRUE;
2244 link_info.emit_gnu_hash = TRUE;
2247 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2254 if (strcmp (optarg, "defs") == 0)
2255 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2256 else if (strcmp (optarg, "muldefs") == 0)
2257 link_info.allow_multiple_definition = TRUE;
2258 else if (CONST_STRNEQ (optarg, "max-page-size="))
2262 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2263 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2264 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2267 else if (CONST_STRNEQ (optarg, "common-page-size="))
2270 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2272 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2273 einfo (_("%P%F: invalid common page size \`%s'\n"),
2276 else if (CONST_STRNEQ (optarg, "stack-size="))
2279 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2280 if (*end || link_info.stacksize < 0)
2281 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2282 if (!link_info.stacksize)
2283 /* Use -1 for explicit no-stack, because zero means
2285 link_info.stacksize = -1;
2287 else if (strcmp (optarg, "execstack") == 0)
2289 link_info.execstack = TRUE;
2290 link_info.noexecstack = FALSE;
2292 else if (strcmp (optarg, "noexecstack") == 0)
2294 link_info.noexecstack = TRUE;
2295 link_info.execstack = FALSE;
2298 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2300 else if (strcmp (optarg, "global") == 0)
2301 link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL;
2302 else if (strcmp (optarg, "initfirst") == 0)
2303 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2304 else if (strcmp (optarg, "interpose") == 0)
2305 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2306 else if (strcmp (optarg, "loadfltr") == 0)
2307 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2308 else if (strcmp (optarg, "nodefaultlib") == 0)
2309 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2310 else if (strcmp (optarg, "nodelete") == 0)
2311 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2312 else if (strcmp (optarg, "nodlopen") == 0)
2313 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2314 else if (strcmp (optarg, "nodump") == 0)
2315 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2316 else if (strcmp (optarg, "now") == 0)
2318 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2319 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2321 else if (strcmp (optarg, "lazy") == 0)
2323 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2324 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2326 else if (strcmp (optarg, "origin") == 0)
2328 link_info.flags |= (bfd_vma) DF_ORIGIN;
2329 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2331 else if (strcmp (optarg, "combreloc") == 0)
2332 link_info.combreloc = TRUE;
2333 else if (strcmp (optarg, "nocombreloc") == 0)
2334 link_info.combreloc = FALSE;
2335 else if (strcmp (optarg, "nocopyreloc") == 0)
2336 link_info.nocopyreloc = TRUE;
2337 else if (strcmp (optarg, "relro") == 0)
2338 link_info.relro = TRUE;
2339 else if (strcmp (optarg, "norelro") == 0)
2340 link_info.relro = FALSE;
2341 else if (strcmp (optarg, "text") == 0)
2342 link_info.error_textrel = TRUE;
2343 else if (strcmp (optarg, "notext") == 0)
2344 link_info.error_textrel = FALSE;
2345 else if (strcmp (optarg, "textoff") == 0)
2346 link_info.error_textrel = FALSE;
2352 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2356 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2358 $PARSE_AND_LIST_ARGS_CASES
2370 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2374 gld${EMULATION_NAME}_list_options (FILE * file)
2377 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2380 --audit=AUDITLIB Specify a library to use for auditing\n"));
2382 -Bgroup Selects group name lookup rules for DSO\n"));
2387 --build-id[=STYLE] Generate build ID note\n"));
2389 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2392 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2393 Specify a library to use for auditing dependencies\n"));
2395 --disable-new-dtags Disable new dynamic tags\n"));
2397 --enable-new-dtags Enable new dynamic tags\n"));
2399 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2401 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2403 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2405 -z combreloc Merge dynamic relocs into one section and sort\n"));
2411 -z common-page-size=SIZE Set common page size to SIZE\n"));
2413 -z defs Report unresolved symbols in object files.\n"));
2415 -z execstack Mark executable as requiring executable stack\n"));
2418 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2421 -z global Make symbols in DSO available for subsequently\n\
2422 loaded objects\n"));
2424 -z initfirst Mark DSO to be initialized first at runtime\n"));
2426 -z interpose Mark object to interpose all DSOs but executable\n"));
2428 -z lazy Mark object lazy runtime binding (default)\n"));
2430 -z loadfltr Mark object requiring immediate process\n"));
2436 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2438 -z muldefs Allow multiple definitions\n"));
2441 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2444 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2446 -z nocopyreloc Don't create copy relocs\n"));
2448 -z nodefaultlib Mark object not to use default search paths\n"));
2450 -z nodelete Mark DSO non-deletable at runtime\n"));
2452 -z nodlopen Mark DSO not available to dlopen\n"));
2454 -z nodump Mark DSO not available to dldump\n"));
2459 -z noexecstack Mark executable as not requiring executable stack\n"));
2461 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2464 -z norelro Don't create RELRO program header\n"));
2466 -z now Mark object non-lazy runtime binding\n"));
2468 -z origin Mark object requiring immediate \$ORIGIN\n\
2469 processing at runtime\n"));
2471 -z relro Create RELRO program header\n"));
2473 -z stacksize=SIZE Set size of stack segment\n"));
2477 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2479 $PARSE_AND_LIST_OPTIONS
2487 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2489 $PARSE_AND_LIST_EPILOGUE
2496 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2498 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2499 ${LDEMUL_SYSLIB-syslib_default},
2500 ${LDEMUL_HLL-hll_default},
2501 ${LDEMUL_AFTER_PARSE-after_parse_default},
2502 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2503 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2504 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2505 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2506 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2507 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2508 "${EMULATION_NAME}",
2510 ${LDEMUL_FINISH-finish_default},
2511 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2512 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2513 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2514 ${LDEMUL_SET_SYMBOLS-NULL},
2515 ${LDEMUL_PARSE_ARGS-NULL},
2516 gld${EMULATION_NAME}_add_options,
2517 gld${EMULATION_NAME}_handle_option,
2518 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2519 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2520 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2521 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2522 ${LDEMUL_NEW_VERS_PATTERN-NULL}