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 ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
17 Free Software Foundation, Inc.
18 Written by Steve Chamberlain <sac@cygnus.com>
19 ELF support by Ian Lance Taylor <ian@cygnus.com>
21 This file is part of the GNU Binutils.
23 This program is free software; you can redistribute it and/or modify
24 it under the terms of the GNU General Public License as published by
25 the Free Software Foundation; either version 3 of the License, or
26 (at your option) any later version.
28 This program is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
33 You should have received a copy of the GNU General Public License
34 along with this program; if not, write to the Free Software
35 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
36 MA 02110-1301, USA. */
38 #define TARGET_IS_${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`;
112 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
114 /* Handle the generation of DT_NEEDED tags. */
117 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
121 /* Tell the ELF linker that we don't want the output file to have a
122 DT_NEEDED entry for this file, unless it is used to resolve
123 references in a regular object. */
124 if (entry->flags.add_DT_NEEDED_for_regular)
125 link_class = DYN_AS_NEEDED;
127 /* Tell the ELF linker that we don't want the output file to have a
128 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
130 if (!entry->flags.add_DT_NEEDED_for_dynamic)
131 link_class |= DYN_NO_ADD_NEEDED;
133 if (entry->flags.just_syms
134 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
135 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
139 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
142 bfd_elf_set_dyn_lib_class (entry->the_bfd,
143 (enum dynamic_lib_link_class) link_class);
145 /* Continue on with normal load_symbols processing. */
153 /* These variables are required to pass information back and forth
154 between after_open and check_needed and stat_needed and vercheck. */
156 static struct bfd_link_needed_list *global_needed;
157 static struct stat global_stat;
158 static lang_input_statement_type *global_found;
159 static struct bfd_link_needed_list *global_vercheck_needed;
160 static bfd_boolean global_vercheck_failed;
162 /* These variables are used to implement target options */
164 static char *audit; /* colon (typically) separated list of libs */
165 static char *depaudit; /* colon (typically) separated list of libs */
167 /* On Linux, it's possible to have different versions of the same
168 shared library linked against different versions of libc. The
169 dynamic linker somehow tags which libc version to use in
170 /etc/ld.so.cache, and, based on the libc that it sees in the
171 executable, chooses which version of the shared library to use.
173 We try to do a similar check here by checking whether this shared
174 library needs any other shared libraries which may conflict with
175 libraries we have already included in the link. If it does, we
176 skip it, and try to find another shared library farther on down the
179 This is called via lang_for_each_input_file.
180 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
181 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
182 a conflicting version. */
185 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
188 struct bfd_link_needed_list *l;
190 if (global_vercheck_failed)
192 if (s->the_bfd == NULL
193 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
196 soname = bfd_elf_get_dt_soname (s->the_bfd);
198 soname = lbasename (bfd_get_filename (s->the_bfd));
200 for (l = global_vercheck_needed; l != NULL; l = l->next)
204 if (filename_cmp (soname, l->name) == 0)
206 /* Probably can't happen, but it's an easy check. */
210 if (strchr (l->name, '/') != NULL)
213 suffix = strstr (l->name, ".so.");
217 suffix += sizeof ".so." - 1;
219 if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
221 /* Here we know that S is a dynamic object FOO.SO.VER1, and
222 the object we are considering needs a dynamic object
223 FOO.SO.VER2, and VER1 and VER2 are different. This
224 appears to be a version mismatch, so we tell the caller
225 to try a different version of this library. */
226 global_vercheck_failed = TRUE;
233 /* See if an input file matches a DT_NEEDED entry by running stat on
237 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
243 if (global_found != NULL)
245 if (s->the_bfd == NULL)
248 /* If this input file was an as-needed entry, and wasn't found to be
249 needed at the stage it was linked, then don't say we have loaded it. */
250 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
253 if (bfd_stat (s->the_bfd, &st) != 0)
255 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
259 /* Some operating systems, e.g. Windows, do not provide a meaningful
260 st_ino; they always set it to zero. (Windows does provide a
261 meaningful st_dev.) Do not indicate a duplicate library in that
262 case. While there is no guarantee that a system that provides
263 meaningful inode numbers will never set st_ino to zero, this is
264 merely an optimization, so we do not need to worry about false
266 if (st.st_dev == global_stat.st_dev
267 && st.st_ino == global_stat.st_ino
274 /* We issue a warning if it looks like we are including two
275 different versions of the same shared library. For example,
276 there may be a problem if -lc picks up libc.so.6 but some other
277 shared library has a DT_NEEDED entry of libc.so.5. This is a
278 heuristic test, and it will only work if the name looks like
279 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
280 If we really want to issue warnings about mixing version numbers
281 of shared libraries, we need to find a better way. */
283 if (strchr (global_needed->name, '/') != NULL)
285 suffix = strstr (global_needed->name, ".so.");
288 suffix += sizeof ".so." - 1;
290 soname = bfd_elf_get_dt_soname (s->the_bfd);
292 soname = lbasename (s->filename);
294 if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
295 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
296 global_needed->name, global_needed->by, soname);
305 /* This function is called for each possible name for a dynamic object
306 named by a DT_NEEDED entry. The FORCE parameter indicates whether
307 to skip the check for a conflicting version. */
310 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
314 const char *name = needed->name;
318 abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
322 /* Linker needs to decompress sections. */
323 abfd->flags |= BFD_DECOMPRESS;
325 if (! bfd_check_format (abfd, bfd_object))
330 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
336 /* For DT_NEEDED, they have to match. */
337 if (abfd->xvec != link_info.output_bfd->xvec)
343 /* Check whether this object would include any conflicting library
344 versions. If FORCE is set, then we skip this check; we use this
345 the second time around, if we couldn't find any compatible
346 instance of the shared library. */
350 struct bfd_link_needed_list *needs;
352 if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
353 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
357 global_vercheck_needed = needs;
358 global_vercheck_failed = FALSE;
359 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
360 if (global_vercheck_failed)
363 /* Return FALSE to force the caller to move on to try
364 another file on the search path. */
368 /* But wait! It gets much worse. On Linux, if a shared
369 library does not use libc at all, we are supposed to skip
370 it the first time around in case we encounter a shared
371 library later on with the same name which does use the
372 version of libc that we want. This is much too horrible
373 to use on any system other than Linux. */
377 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
380 struct bfd_link_needed_list *l;
382 for (l = needs; l != NULL; l = l->next)
383 if (CONST_STRNEQ (l->name, "libc.so"))
399 /* We've found a dynamic object matching the DT_NEEDED entry. */
401 /* We have already checked that there is no other input file of the
402 same name. We must now check again that we are not including the
403 same file twice. We need to do this because on many systems
404 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
405 reference libc.so.1. If we have already included libc.so, we
406 don't want to include libc.so.1 if they are the same file, and we
407 can only check that using stat. */
409 if (bfd_stat (abfd, &global_stat) != 0)
410 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
412 /* First strip off everything before the last '/'. */
413 soname = lbasename (abfd->filename);
416 info_msg (_("found %s at %s\n"), soname, name);
419 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
420 if (global_found != NULL)
422 /* Return TRUE to indicate that we found the file, even though
423 we aren't going to do anything with it. */
427 /* Specify the soname to use. */
428 bfd_elf_set_dt_needed_name (abfd, soname);
430 /* Tell the ELF linker that we don't want the output file to have a
431 DT_NEEDED entry for this file, unless it is used to resolve
432 references in a regular object. */
433 link_class = DYN_DT_NEEDED;
435 /* Tell the ELF linker that we don't want the output file to have a
436 DT_NEEDED entry for this file at all if the entry is from a file
437 with DYN_NO_ADD_NEEDED. */
438 if (needed->by != NULL
439 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
440 link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
442 bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);
444 /* Add this file into the symbol table. */
445 if (! bfd_link_add_symbols (abfd, &link_info))
446 einfo ("%F%B: could not read symbols: %E\n", abfd);
452 /* Search for a needed file in a path. */
455 gld${EMULATION_NAME}_search_needed (const char *path,
456 struct dt_needed *n, int force)
459 const char *name = n->name;
461 struct dt_needed needed;
464 return gld${EMULATION_NAME}_try_needed (n, force);
466 if (path == NULL || *path == '\0')
470 needed.name = n->name;
475 char *filename, *sset;
477 s = strchr (path, config.rpath_separator);
479 s = path + strlen (path);
481 #if HAVE_DOS_BASED_FILE_SYSTEM
482 /* Assume a match on the second char is part of drive specifier. */
483 else if (config.rpath_separator == ':'
487 s = strchr (s + 1, config.rpath_separator);
489 s = path + strlen (path);
492 filename = (char *) xmalloc (s - path + len + 2);
497 memcpy (filename, path, s - path);
498 filename[s - path] = '/';
499 sset = filename + (s - path) + 1;
503 needed.name = filename;
504 if (gld${EMULATION_NAME}_try_needed (&needed, force))
518 if [ "x${USE_LIBPATH}" = xyes ] ; then
521 /* Add the sysroot to every entry in a path separated by
522 config.rpath_separator. */
525 gld${EMULATION_NAME}_add_sysroot (const char *path)
534 if (path[i++] == config.rpath_separator)
540 len = len + (colons + 1) * strlen (ld_sysroot);
541 ret = xmalloc (len + 1);
542 strcpy (ret, ld_sysroot);
543 p = ret + strlen (ret);
546 if (path[i] == config.rpath_separator)
549 strcpy (p, ld_sysroot);
561 *-*-freebsd* | *-*-dragonfly*)
563 /* Read the system search path the FreeBSD way rather than the Linux way. */
564 #ifdef HAVE_ELF_HINTS_H
565 #include <elf-hints.h>
567 #include "elf-hints-local.h"
571 gld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force)
573 static bfd_boolean initialized;
574 static char *ld_elf_hints;
575 struct dt_needed needed;
582 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
583 f = fopen (tmppath, FOPEN_RB);
587 struct elfhints_hdr hdr;
589 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
590 && hdr.magic == ELFHINTS_MAGIC
593 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
597 b = xmalloc (hdr.dirlistlen + 1);
598 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
600 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
611 if (ld_elf_hints == NULL)
616 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,
623 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
625 /* For a native linker, check the file /etc/ld.so.conf for directories
626 in which we may find shared libraries. /etc/ld.so.conf is really
627 only meaningful on Linux. */
629 struct gld${EMULATION_NAME}_ld_so_conf
636 gld${EMULATION_NAME}_parse_ld_so_conf
637 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
640 gld${EMULATION_NAME}_parse_ld_so_conf_include
641 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
649 if (pattern[0] != '/')
651 char *p = strrchr (filename, '/');
652 size_t patlen = strlen (pattern) + 1;
654 newp = xmalloc (p - filename + 1 + patlen);
655 memcpy (newp, filename, p - filename + 1);
656 memcpy (newp + (p - filename + 1), pattern, patlen);
661 if (glob (pattern, 0, NULL, &gl) == 0)
665 for (i = 0; i < gl.gl_pathc; ++i)
666 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
670 /* If we do not have glob, treat the pattern as a literal filename. */
671 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
679 gld${EMULATION_NAME}_parse_ld_so_conf
680 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
682 FILE *f = fopen (filename, FOPEN_RT);
690 line = xmalloc (linelen);
695 /* Normally this would use getline(3), but we need to be portable. */
696 while ((q = fgets (p, linelen - (p - line), f)) != NULL
697 && strlen (q) == linelen - (p - line) - 1
698 && line[linelen - 2] != '\n')
700 line = xrealloc (line, 2 * linelen);
701 p = line + linelen - 1;
705 if (q == NULL && p == line)
708 p = strchr (line, '\n');
712 /* Because the file format does not know any form of quoting we
713 can search forward for the next '#' character and if found
714 make it terminating the line. */
715 p = strchr (line, '#');
719 /* Remove leading whitespace. NUL is no whitespace character. */
721 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
724 /* If the line is blank it is ignored. */
728 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
734 while (*p == ' ' || *p == '\t')
742 while (*p != ' ' && *p != '\t' && *p)
748 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
756 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
757 && *p != '\r' && *p != '\v')
760 while (p != dir && p[-1] == '/')
762 if (info->path == NULL)
764 info->alloc = p - dir + 1 + 256;
765 info->path = xmalloc (info->alloc);
770 if (info->len + 1 + (p - dir) >= info->alloc)
772 info->alloc += p - dir + 256;
773 info->path = xrealloc (info->path, info->alloc);
775 info->path[info->len++] = config.rpath_separator;
777 memcpy (info->path + info->len, dir, p - dir);
778 info->len += p - dir;
779 info->path[info->len] = '\0';
789 gld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force)
791 static bfd_boolean initialized;
792 static char *ld_so_conf;
793 struct dt_needed needed;
798 struct gld${EMULATION_NAME}_ld_so_conf info;
801 info.len = info.alloc = 0;
802 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
803 (const char *) NULL);
804 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
807 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
808 (const char *) NULL);
809 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
815 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
822 if (ld_so_conf == NULL)
828 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
838 /* See if an input file matches a DT_NEEDED entry by name. */
841 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
845 /* Stop looking if we've found a loaded lib. */
846 if (global_found != NULL
847 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
848 & DYN_AS_NEEDED) == 0)
851 if (s->filename == NULL || s->the_bfd == NULL)
854 /* Don't look for a second non-loaded as-needed lib. */
855 if (global_found != NULL
856 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
859 if (filename_cmp (s->filename, global_needed->name) == 0)
865 if (s->flags.search_dirs)
867 const char *f = strrchr (s->filename, '/');
869 && filename_cmp (f + 1, global_needed->name) == 0)
876 soname = bfd_elf_get_dt_soname (s->the_bfd);
878 && filename_cmp (soname, global_needed->name) == 0)
887 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
891 gld${EMULATION_NAME}_id_note_section_size (bfd *abfd,
892 struct bfd_link_info *linfo)
894 const char *style = linfo->emit_note_gnu_build_id;
899 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
900 size = (size + 3) & -(bfd_size_type) 4;
902 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
904 else if (!strcmp (style, "sha1"))
906 else if (!strncmp (style, "0x", 2))
908 /* ID is in string form (hex). Convert to bits. */
909 const char *id = style + 2;
912 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
917 else if (*id == '-' || *id == ':')
924 } while (*id != '\0');
933 read_hex (const char xdigit)
935 if (ISDIGIT (xdigit))
937 if (ISUPPER (xdigit))
938 return xdigit - 'A' + 0xa;
939 if (ISLOWER (xdigit))
940 return xdigit - 'a' + 0xa;
952 gld${EMULATION_NAME}_write_build_id_section (bfd *abfd)
954 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
955 struct build_id_info *info = (struct build_id_info *)
956 elf_tdata (abfd)->after_write_object_contents_info;
958 Elf_Internal_Shdr *i_shdr;
959 unsigned char *contents, *id_bits;
961 Elf_External_Note *e_note;
964 if (bfd_is_abs_section (asec->output_section))
966 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
967 " --build-id ignored.\n"));
970 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
972 if (i_shdr->contents == NULL)
974 if (asec->contents == NULL)
975 asec->contents = (unsigned char *) xmalloc (asec->size);
976 contents = asec->contents;
979 contents = i_shdr->contents + asec->output_offset;
981 e_note = (Elf_External_Note *) contents;
982 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
983 size = (size + 3) & -(bfd_size_type) 4;
984 id_bits = contents + size;
985 size = asec->size - size;
987 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
988 bfd_h_put_32 (abfd, size, &e_note->descsz);
989 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
990 memcpy (e_note->name, "GNU", sizeof "GNU");
992 if (!strcmp (info->style, "md5"))
996 if (bed->s->checksum_contents (abfd,
997 (void (*) (const void *, size_t, void *))
1000 md5_finish_ctx (&ctx, id_bits);
1004 else if (!strcmp (info->style, "sha1"))
1006 struct sha1_ctx ctx;
1007 sha1_init_ctx (&ctx);
1008 if (bed->s->checksum_contents (abfd,
1009 (void (*) (const void *, size_t, void *))
1010 &sha1_process_bytes,
1012 sha1_finish_ctx (&ctx, id_bits);
1016 else if (!strcmp (info->style, "uuid"))
1019 int fd = open ("/dev/urandom", O_RDONLY);
1022 n = read (fd, id_bits, size);
1027 else if (!strncmp (info->style, "0x", 2))
1029 /* ID is in string form (hex). Convert to bits. */
1030 const char *id = info->style + 2;
1034 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1036 id_bits[n] = read_hex (*id++) << 4;
1037 id_bits[n++] |= read_hex (*id++);
1039 else if (*id == '-' || *id == ':')
1042 abort (); /* Should have been validated earlier. */
1043 } while (*id != '\0');
1046 abort (); /* Should have been validated earlier. */
1049 return (bfd_seek (abfd,
1050 i_shdr->sh_offset + asec->output_offset, SEEK_SET) == 0
1051 && bfd_bwrite (contents, size, abfd) == size);
1055 /* This is called after all the input files have been opened. */
1058 gld${EMULATION_NAME}_after_open (void)
1060 struct bfd_link_needed_list *needed, *l;
1061 struct elf_link_hash_table *htab;
1063 after_open_default ();
1065 htab = elf_hash_table (&link_info);
1066 if (!is_elf_hash_table (htab))
1069 if (link_info.emit_note_gnu_build_id)
1075 /* Find an ELF input. */
1076 for (abfd = link_info.input_bfds;
1077 abfd != (bfd *) NULL; abfd = abfd->link_next)
1078 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1083 /* PR 10555: If there are no input files do not
1084 try to create a .note.gnu-build-id section. */
1085 free (link_info.emit_note_gnu_build_id);
1086 link_info.emit_note_gnu_build_id = NULL;
1090 size = gld${EMULATION_NAME}_id_note_section_size (abfd, &link_info);
1093 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1094 free (link_info.emit_note_gnu_build_id);
1095 link_info.emit_note_gnu_build_id = NULL;
1099 s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id",
1100 SEC_ALLOC | SEC_LOAD
1101 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1102 | SEC_READONLY | SEC_DATA);
1103 if (s != NULL && bfd_set_section_alignment (abfd, s, 2))
1105 struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
1106 struct build_id_info *b =
1107 (struct build_id_info *) xmalloc (sizeof *b);
1109 b->style = link_info.emit_note_gnu_build_id;
1111 elf_section_type (s) = SHT_NOTE;
1113 t->after_write_object_contents
1114 = &gld${EMULATION_NAME}_write_build_id_section;
1115 t->after_write_object_contents_info = b;
1119 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1120 " --build-id ignored.\n");
1121 free (link_info.emit_note_gnu_build_id);
1122 link_info.emit_note_gnu_build_id = NULL;
1128 if (link_info.relocatable)
1131 if (link_info.eh_frame_hdr
1132 && !link_info.traditional_format)
1134 bfd *abfd, *elfbfd = NULL;
1135 bfd_boolean warn_eh_frame = FALSE;
1138 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1140 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1144 s = bfd_get_section_by_name (abfd, ".eh_frame");
1147 || bfd_is_abs_section (s->output_section)))
1148 s = bfd_get_next_section_by_name (s);
1149 warn_eh_frame = s != NULL;
1151 if (elfbfd && warn_eh_frame)
1156 const struct elf_backend_data *bed;
1158 bed = get_elf_backend_data (elfbfd);
1159 s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
1160 bed->dynamic_sec_flags
1163 && bfd_set_section_alignment (elfbfd, s, 2))
1165 htab->eh_info.hdr_sec = s;
1166 warn_eh_frame = FALSE;
1170 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1171 " --eh-frame-hdr ignored.\n");
1174 /* Get the list of files which appear in DT_NEEDED entries in
1175 dynamic objects included in the link (often there will be none).
1176 For each such file, we want to track down the corresponding
1177 library, and include the symbol table in the link. This is what
1178 the runtime dynamic linker will do. Tracking the files down here
1179 permits one dynamic object to include another without requiring
1180 special action by the person doing the link. Note that the
1181 needed list can actually grow while we are stepping through this
1183 if (!link_info.executable)
1185 needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
1186 for (l = needed; l != NULL; l = l->next)
1188 struct bfd_link_needed_list *ll;
1189 struct dt_needed n, nn;
1192 /* If the lib that needs this one was --as-needed and wasn't
1193 found to be needed, then this lib isn't needed either. */
1195 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1198 /* If we've already seen this file, skip it. */
1199 for (ll = needed; ll != l; ll = ll->next)
1201 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1202 && strcmp (ll->name, l->name) == 0)
1207 /* See if this file was included in the link explicitly. */
1209 global_found = NULL;
1210 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1211 if (global_found != NULL
1212 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1213 & DYN_AS_NEEDED) == 0)
1220 info_msg (_("%s needed by %B\n"), l->name, l->by);
1222 /* As-needed libs specified on the command line (or linker script)
1223 take priority over libs found in search dirs. */
1224 if (global_found != NULL)
1226 nn.name = global_found->filename;
1227 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1231 /* We need to find this file and include the symbol table. We
1232 want to search for the file in the same way that the dynamic
1233 linker will search. That means that we want to use
1234 rpath_link, rpath, then the environment variable
1235 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1236 entries (native only), then the linker script LIB_SEARCH_DIRS.
1237 We do not search using the -L arguments.
1239 We search twice. The first time, we skip objects which may
1240 introduce version mismatches. The second time, we force
1241 their use. See gld${EMULATION_NAME}_vercheck comment. */
1242 for (force = 0; force < 2; force++)
1245 search_dirs_type *search;
1247 if [ "x${NATIVE}" = xyes ] ; then
1249 const char *lib_path;
1252 if [ "x${USE_LIBPATH}" = xyes ] ; then
1254 struct bfd_link_needed_list *rp;
1260 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1264 if [ "x${USE_LIBPATH}" = xyes ] ; then
1266 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1271 if [ "x${NATIVE}" = xyes ] ; then
1273 if (command_line.rpath_link == NULL
1274 && command_line.rpath == NULL)
1276 lib_path = (const char *) getenv ("LD_RUN_PATH");
1277 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1281 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1282 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1286 if [ "x${USE_LIBPATH}" = xyes ] ; then
1289 rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
1290 for (; !found && rp != NULL; rp = rp->next)
1292 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1293 found = (rp->by == l->by
1294 && gld${EMULATION_NAME}_search_needed (tmpname,
1304 if [ "x${USE_LIBPATH}" = xyes ] ; then
1306 *-*-freebsd* | *-*-dragonfly*)
1308 if (gld${EMULATION_NAME}_check_ld_elf_hints (l->name, force))
1314 *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*)
1317 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
1325 len = strlen (l->name);
1326 for (search = search_head; search != NULL; search = search->next)
1330 if (search->cmdline)
1332 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1333 sprintf (filename, "%s/%s", search->name, l->name);
1335 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1348 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1358 /* Look through an expression for an assignment statement. */
1361 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1363 bfd_boolean provide = FALSE;
1365 switch (exp->type.node_class)
1368 case etree_provided:
1372 /* We call record_link_assignment even if the symbol is defined.
1373 This is because if it is defined by a dynamic object, we
1374 actually want to use the value defined by the linker script,
1375 not the value from the dynamic object (because we are setting
1376 symbols like etext). If the symbol is defined by a regular
1377 object, then, as it happens, calling record_link_assignment
1379 if (strcmp (exp->assign.dst, ".") != 0)
1381 if (!bfd_elf_record_link_assignment (link_info.output_bfd,
1383 exp->assign.dst, provide,
1384 exp->assign.hidden))
1385 einfo ("%P%F: failed to record assignment to %s: %E\n",
1388 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1392 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1393 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1397 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1398 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1399 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1403 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1412 /* This is called by the before_allocation routine via
1413 lang_for_each_statement. It locates any assignment statements, and
1414 tells the ELF backend about them, in case they are assignments to
1415 symbols which are referred to by dynamic objects. */
1418 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1420 if (s->header.type == lang_assignment_statement_enum)
1421 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1426 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1427 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1428 ELF_INTERPRETER_SET_DEFAULT="
1429 if (sinterp != NULL)
1431 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1432 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1437 ELF_INTERPRETER_SET_DEFAULT=
1441 /* used by before_allocation and handle_option. */
1443 gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg)
1446 *to = xstrdup (op_arg);
1449 size_t to_len = strlen (*to);
1450 size_t op_arg_len = strlen (op_arg);
1454 /* First see whether OPTARG is already in the path. */
1457 if (strncmp (op_arg, cp, op_arg_len) == 0
1458 && (cp[op_arg_len] == 0
1459 || cp[op_arg_len] == config.rpath_separator))
1463 /* Not yet found. */
1464 cp = strchr (cp, config.rpath_separator);
1472 buf = xmalloc (to_len + op_arg_len + 2);
1473 sprintf (buf, "%s%c%s", *to,
1474 config.rpath_separator, op_arg);
1481 /* This is called after the sections have been attached to output
1482 sections, but before any sizes or addresses have been set. */
1485 gld${EMULATION_NAME}_before_allocation (void)
1491 if (link_info.hash->type == bfd_link_elf_hash_table)
1492 _bfd_elf_tls_setup (link_info.output_bfd, &link_info);
1494 /* If we are going to make any variable assignments, we need to let
1495 the ELF backend know about them in case the variables are
1496 referred to by dynamic objects. */
1497 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1499 /* Let the ELF backend work out the sizes of any sections required
1500 by dynamic linking. */
1501 rpath = command_line.rpath;
1503 rpath = (const char *) getenv ("LD_RUN_PATH");
1505 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1506 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1508 const char *audit_libs = elf_dt_audit (abfd);
1510 /* If the input bfd contains an audit entry, we need to add it as
1511 a dep audit entry. */
1512 if (audit_libs && *audit_libs != '\0')
1514 char *cp = xstrdup (audit_libs);
1518 char *cp2 = strchr (cp, config.rpath_separator);
1526 if (cp != NULL && *cp != '\0')
1527 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);
1529 cp = more ? ++cp2 : NULL;
1535 if (! (bfd_elf_size_dynamic_sections
1536 (link_info.output_bfd, command_line.soname, rpath,
1537 command_line.filter_shlib, audit, depaudit,
1538 (const char * const *) command_line.auxiliary_filters,
1539 &link_info, &sinterp)))
1540 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1542 ${ELF_INTERPRETER_SET_DEFAULT}
1543 /* Let the user override the dynamic linker we are using. */
1544 if (command_line.interpreter != NULL
1547 sinterp->contents = (bfd_byte *) command_line.interpreter;
1548 sinterp->size = strlen (command_line.interpreter) + 1;
1551 /* Look for any sections named .gnu.warning. As a GNU extensions,
1552 we treat such sections as containing warning messages. We print
1553 out the warning message, and then zero out the section size so
1554 that it does not get copied into the output file. */
1557 LANG_FOR_EACH_INPUT_STATEMENT (is)
1564 if (is->flags.just_syms)
1567 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1572 msg = (char *) xmalloc ((size_t) (sz + 1));
1573 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1575 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1578 ret = link_info.callbacks->warning (&link_info, msg,
1579 (const char *) NULL,
1580 is->the_bfd, (asection *) NULL,
1585 /* Clobber the section size, so that we don't waste space
1586 copying the warning into the output file. If we've already
1587 sized the output section, adjust its size. The adjustment
1588 is on rawsize because targets that size sections early will
1589 have called lang_reset_memory_regions after sizing. */
1590 if (s->output_section != NULL
1591 && s->output_section->rawsize >= s->size)
1592 s->output_section->rawsize -= s->size;
1596 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1597 warning section don't get copied to the output. */
1598 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1602 before_allocation_default ();
1604 if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
1605 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1611 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1614 /* Try to open a dynamic archive. This is where we know that ELF
1615 dynamic libraries have an extension of .so (or .sl on oddball systems
1619 gld${EMULATION_NAME}_open_dynamic_archive
1620 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1622 const char *filename;
1625 if (! entry->flags.maybe_archive)
1628 filename = entry->filename;
1630 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1631 is defined, but it does not seem worth the headache to optimize
1632 away those two bytes of space. */
1633 string = (char *) xmalloc (strlen (search->name)
1636 #ifdef EXTRA_SHLIB_EXTENSION
1637 + strlen (EXTRA_SHLIB_EXTENSION)
1639 + sizeof "/lib.so");
1641 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1643 #ifdef EXTRA_SHLIB_EXTENSION
1644 /* Try the .so extension first. If that fails build a new filename
1645 using EXTRA_SHLIB_EXTENSION. */
1646 if (! ldfile_try_open_bfd (string, entry))
1648 sprintf (string, "%s/lib%s%s%s", search->name,
1649 filename, arch, EXTRA_SHLIB_EXTENSION);
1652 if (! ldfile_try_open_bfd (string, entry))
1657 #ifdef EXTRA_SHLIB_EXTENSION
1661 entry->filename = string;
1663 /* We have found a dynamic object to include in the link. The ELF
1664 backend linker will create a DT_NEEDED entry in the .dynamic
1665 section naming this file. If this file includes a DT_SONAME
1666 entry, it will be used. Otherwise, the ELF linker will just use
1667 the name of the file. For an archive found by searching, like
1668 this one, the DT_NEEDED entry should consist of just the name of
1669 the file, without the path information used to find it. Note
1670 that we only need to do this if we have a dynamic object; an
1671 archive will never be referenced by a DT_NEEDED entry.
1673 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1674 very pretty. I haven't been able to think of anything that is
1676 if (bfd_check_format (entry->the_bfd, bfd_object)
1677 && (entry->the_bfd->flags & DYNAMIC) != 0)
1679 ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);
1681 /* Rather than duplicating the logic above. Just use the
1682 filename we recorded earlier. */
1684 filename = lbasename (entry->filename);
1685 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1694 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1697 /* A variant of lang_output_section_find used by place_orphan. */
1699 static lang_output_section_statement_type *
1700 output_rel_find (asection *sec, int isdyn)
1702 lang_output_section_statement_type *lookup;
1703 lang_output_section_statement_type *last = NULL;
1704 lang_output_section_statement_type *last_alloc = NULL;
1705 lang_output_section_statement_type *last_ro_alloc = NULL;
1706 lang_output_section_statement_type *last_rel = NULL;
1707 lang_output_section_statement_type *last_rel_alloc = NULL;
1708 int rela = sec->name[4] == 'a';
1710 for (lookup = &lang_output_section_statement.head->output_section_statement;
1712 lookup = lookup->next)
1714 if (lookup->constraint >= 0
1715 && CONST_STRNEQ (lookup->name, ".rel"))
1717 int lookrela = lookup->name[4] == 'a';
1719 /* .rel.dyn must come before all other reloc sections, to suit
1724 /* Don't place after .rel.plt as doing so results in wrong
1726 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1729 if (rela == lookrela || last_rel == NULL)
1731 if ((rela == lookrela || last_rel_alloc == NULL)
1732 && lookup->bfd_section != NULL
1733 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1734 last_rel_alloc = lookup;
1738 if (lookup->bfd_section != NULL
1739 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1741 last_alloc = lookup;
1742 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1743 last_ro_alloc = lookup;
1748 return last_rel_alloc;
1754 return last_ro_alloc;
1762 /* Place an orphan section. We use this to put random SHF_ALLOC
1763 sections in the right segment. */
1765 static lang_output_section_statement_type *
1766 gld${EMULATION_NAME}_place_orphan (asection *s,
1767 const char *secname,
1770 static struct orphan_save hold[] =
1773 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1776 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1779 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1785 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1788 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1791 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1797 enum orphan_save_index
1808 static int orphan_init_done = 0;
1809 struct orphan_save *place;
1810 lang_output_section_statement_type *after;
1811 lang_output_section_statement_type *os;
1812 lang_output_section_statement_type *match_by_name = NULL;
1814 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1815 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1817 if (! link_info.relocatable
1818 && link_info.combreloc
1819 && (s->flags & SEC_ALLOC))
1825 secname = ".rela.dyn";
1829 secname = ".rel.dyn";
1835 else if (CONST_STRNEQ (secname, ".rel"))
1837 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1842 /* Look through the script to see where to place this section. */
1843 if (constraint == 0)
1844 for (os = lang_output_section_find (secname);
1846 os = next_matching_output_section_statement (os, 0))
1848 /* If we don't match an existing output section, tell
1849 lang_insert_orphan to create a new output section. */
1850 constraint = SPECIAL;
1852 if (os->bfd_section != NULL
1853 && (os->bfd_section->flags == 0
1854 || (_bfd_elf_match_sections_by_type (link_info.output_bfd,
1857 && ((s->flags ^ os->bfd_section->flags)
1858 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1860 /* We already have an output section statement with this
1861 name, and its bfd section has compatible flags.
1862 If the section already exists but does not have any flags
1863 set, then it has been created by the linker, probably as a
1864 result of a --section-start command line switch. */
1865 lang_add_section (&os->children, s, NULL, os);
1869 /* Save unused output sections in case we can match them
1870 against orphans later. */
1871 if (os->bfd_section == NULL)
1875 /* If we didn't match an active output section, see if we matched an
1876 unused one and use that. */
1879 lang_add_section (&match_by_name->children, s, NULL, match_by_name);
1880 return match_by_name;
1883 if (!orphan_init_done)
1885 struct orphan_save *ho;
1887 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1888 if (ho->name != NULL)
1890 ho->os = lang_output_section_find (ho->name);
1891 if (ho->os != NULL && ho->os->flags == 0)
1892 ho->os->flags = ho->flags;
1894 orphan_init_done = 1;
1897 /* If this is a final link, then always put .gnu.warning.SYMBOL
1898 sections into the .text section to get them out of the way. */
1899 if (link_info.executable
1900 && ! link_info.relocatable
1901 && CONST_STRNEQ (s->name, ".gnu.warning.")
1902 && hold[orphan_text].os != NULL)
1904 os = hold[orphan_text].os;
1905 lang_add_section (&os->children, s, NULL, os);
1909 /* Decide which segment the section should go in based on the
1910 section name and section flags. We put loadable .note sections
1911 right after the .interp section, so that the PT_NOTE segment is
1912 stored right after the program headers where the OS can read it
1913 in the first page. */
1916 if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
1917 place = &hold[orphan_nonalloc];
1918 else if ((s->flags & SEC_ALLOC) == 0)
1920 else if ((s->flags & SEC_LOAD) != 0
1921 && ((iself && sh_type == SHT_NOTE)
1922 || (!iself && CONST_STRNEQ (secname, ".note"))))
1923 place = &hold[orphan_interp];
1924 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
1925 place = &hold[orphan_bss];
1926 else if ((s->flags & SEC_SMALL_DATA) != 0)
1927 place = &hold[orphan_sdata];
1928 else if ((s->flags & SEC_READONLY) == 0)
1929 place = &hold[orphan_data];
1930 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1931 || (!iself && CONST_STRNEQ (secname, ".rel")))
1932 && (s->flags & SEC_LOAD) != 0)
1933 place = &hold[orphan_rel];
1934 else if ((s->flags & SEC_CODE) == 0)
1935 place = &hold[orphan_rodata];
1937 place = &hold[orphan_text];
1942 if (place->os == NULL)
1944 if (place->name != NULL)
1945 place->os = lang_output_section_find (place->name);
1947 place->os = output_rel_find (s, isdyn);
1951 after = lang_output_section_find_by_flags
1952 (s, &place->os, _bfd_elf_match_sections_by_type);
1954 /* *ABS* is always the first output section statement. */
1955 after = &lang_output_section_statement.head->output_section_statement;
1958 return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
1963 if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then
1967 gld${EMULATION_NAME}_after_allocation (void)
1969 bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,
1971 gld${EMULATION_NAME}_map_segments (need_layout);
1976 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1980 gld${EMULATION_NAME}_get_script (int *isfile)
1983 if test -n "$COMPILE_IN"
1985 # Scripts compiled in.
1987 # sed commands to quote an ld script as a C string.
1988 sc="-f stringify.sed"
1994 if (link_info.relocatable && config.build_constructors)
1997 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1998 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1999 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
2000 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
2001 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
2002 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
2003 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
2004 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
2006 if test -n "$GENERATE_PIE_SCRIPT" ; then
2007 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2008 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
2009 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2010 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2011 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
2012 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2013 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
2015 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
2016 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
2018 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2019 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2020 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
2021 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
2022 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2023 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
2024 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
2025 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
2027 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
2028 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
2030 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2031 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
2032 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
2033 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
2034 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
2035 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
2037 echo ' ; else return' >> e${EMULATION_NAME}.c
2038 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
2039 echo '; }' >> e${EMULATION_NAME}.c
2042 # Scripts read from the filesystem.
2048 if (link_info.relocatable && config.build_constructors)
2049 return "ldscripts/${EMULATION_NAME}.xu";
2050 else if (link_info.relocatable)
2051 return "ldscripts/${EMULATION_NAME}.xr";
2052 else if (!config.text_read_only)
2053 return "ldscripts/${EMULATION_NAME}.xbn";
2055 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
2058 else if (!config.magic_demand_paged)
2059 return "ldscripts/${EMULATION_NAME}.xn";
2062 if test -n "$GENERATE_PIE_SCRIPT" ; then
2063 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2065 else if (link_info.pie && link_info.combreloc
2066 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2067 return "ldscripts/${EMULATION_NAME}.xdw";
2068 else if (link_info.pie && link_info.combreloc)
2069 return "ldscripts/${EMULATION_NAME}.xdc";
2073 else if (link_info.pie)
2074 return "ldscripts/${EMULATION_NAME}.xd";
2077 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
2078 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2080 else if (link_info.shared && link_info.combreloc
2081 && link_info.relro && (link_info.flags & DF_BIND_NOW))
2082 return "ldscripts/${EMULATION_NAME}.xsw";
2083 else if (link_info.shared && link_info.combreloc)
2084 return "ldscripts/${EMULATION_NAME}.xsc";
2088 else if (link_info.shared)
2089 return "ldscripts/${EMULATION_NAME}.xs";
2092 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
2094 else if (link_info.combreloc && link_info.relro
2095 && (link_info.flags & DF_BIND_NOW))
2096 return "ldscripts/${EMULATION_NAME}.xw";
2097 else if (link_info.combreloc)
2098 return "ldscripts/${EMULATION_NAME}.xc";
2103 return "ldscripts/${EMULATION_NAME}.x";
2110 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
2112 $PARSE_AND_LIST_PROLOGUE
2118 #define OPTION_DISABLE_NEW_DTAGS (400)
2119 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
2120 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
2121 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
2122 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
2123 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
2124 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
2125 #define OPTION_AUDIT (OPTION_BUILD_ID + 1)
2128 gld${EMULATION_NAME}_add_options
2129 (int ns, char **shortopts, int nl, struct option **longopts,
2130 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
2133 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2135 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";
2139 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
2143 static const struct option xtra_long[] = {
2145 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2147 {"audit", required_argument, NULL, OPTION_AUDIT},
2148 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2152 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
2154 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2156 {"depaudit", required_argument, NULL, 'P'},
2157 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
2158 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
2159 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2160 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2161 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2164 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2166 $PARSE_AND_LIST_LONGOPTS
2170 {NULL, no_argument, NULL, 0}
2173 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2174 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2175 *longopts = (struct option *)
2176 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2177 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2180 #define DEFAULT_BUILD_ID_STYLE "sha1"
2183 gld${EMULATION_NAME}_handle_option (int optc)
2190 case OPTION_BUILD_ID:
2191 if (link_info.emit_note_gnu_build_id != NULL)
2193 free (link_info.emit_note_gnu_build_id);
2194 link_info.emit_note_gnu_build_id = NULL;
2197 optarg = DEFAULT_BUILD_ID_STYLE;
2198 if (strcmp (optarg, "none"))
2199 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2204 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2207 gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);
2211 gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);
2214 case OPTION_DISABLE_NEW_DTAGS:
2215 link_info.new_dtags = FALSE;
2218 case OPTION_ENABLE_NEW_DTAGS:
2219 link_info.new_dtags = TRUE;
2222 case OPTION_EH_FRAME_HDR:
2223 link_info.eh_frame_hdr = TRUE;
2227 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2228 /* Groups must be self-contained. */
2229 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2230 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2233 case OPTION_EXCLUDE_LIBS:
2234 add_excluded_libs (optarg);
2237 case OPTION_HASH_STYLE:
2238 link_info.emit_hash = FALSE;
2239 link_info.emit_gnu_hash = FALSE;
2240 if (strcmp (optarg, "sysv") == 0)
2241 link_info.emit_hash = TRUE;
2242 else if (strcmp (optarg, "gnu") == 0)
2243 link_info.emit_gnu_hash = TRUE;
2244 else if (strcmp (optarg, "both") == 0)
2246 link_info.emit_hash = TRUE;
2247 link_info.emit_gnu_hash = TRUE;
2250 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2257 if (strcmp (optarg, "defs") == 0)
2258 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2259 else if (strcmp (optarg, "muldefs") == 0)
2260 link_info.allow_multiple_definition = TRUE;
2261 else if (CONST_STRNEQ (optarg, "max-page-size="))
2265 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2266 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2267 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2270 else if (CONST_STRNEQ (optarg, "common-page-size="))
2273 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2275 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2276 einfo (_("%P%F: invalid common page size \`%s'\n"),
2279 else if (CONST_STRNEQ (optarg, "stack-size="))
2282 link_info.stacksize = strtoul (optarg + 11, &end, 0);
2283 if (*end || link_info.stacksize < 0)
2284 einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11);
2285 if (!link_info.stacksize)
2286 /* Use -1 for explicit no-stack, because zero means
2288 link_info.stacksize = -1;
2290 else if (strcmp (optarg, "execstack") == 0)
2292 link_info.execstack = TRUE;
2293 link_info.noexecstack = FALSE;
2295 else if (strcmp (optarg, "noexecstack") == 0)
2297 link_info.noexecstack = TRUE;
2298 link_info.execstack = FALSE;
2301 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2303 else if (strcmp (optarg, "initfirst") == 0)
2304 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2305 else if (strcmp (optarg, "interpose") == 0)
2306 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2307 else if (strcmp (optarg, "loadfltr") == 0)
2308 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2309 else if (strcmp (optarg, "nodefaultlib") == 0)
2310 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2311 else if (strcmp (optarg, "nodelete") == 0)
2312 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2313 else if (strcmp (optarg, "nodlopen") == 0)
2314 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2315 else if (strcmp (optarg, "nodump") == 0)
2316 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2317 else if (strcmp (optarg, "now") == 0)
2319 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2320 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2322 else if (strcmp (optarg, "lazy") == 0)
2324 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2325 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2327 else if (strcmp (optarg, "origin") == 0)
2329 link_info.flags |= (bfd_vma) DF_ORIGIN;
2330 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2332 else if (strcmp (optarg, "combreloc") == 0)
2333 link_info.combreloc = TRUE;
2334 else if (strcmp (optarg, "nocombreloc") == 0)
2335 link_info.combreloc = FALSE;
2336 else if (strcmp (optarg, "nocopyreloc") == 0)
2337 link_info.nocopyreloc = TRUE;
2338 else if (strcmp (optarg, "relro") == 0)
2339 link_info.relro = TRUE;
2340 else if (strcmp (optarg, "norelro") == 0)
2341 link_info.relro = FALSE;
2342 else if (strcmp (optarg, "text") == 0)
2343 link_info.error_textrel = TRUE;
2344 else if (strcmp (optarg, "notext") == 0)
2345 link_info.error_textrel = FALSE;
2346 else if (strcmp (optarg, "textoff") == 0)
2347 link_info.error_textrel = FALSE;
2353 einfo (_("%P: warning: -z %s ignored.\n"), optarg);
2357 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2359 $PARSE_AND_LIST_ARGS_CASES
2371 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2375 gld${EMULATION_NAME}_list_options (FILE * file)
2378 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2381 --audit=AUDITLIB Specify a library to use for auditing\n"));
2383 -Bgroup Selects group name lookup rules for DSO\n"));
2388 --build-id[=STYLE] Generate build ID note\n"));
2390 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2393 -P AUDITLIB, --depaudit=AUDITLIB\n" "\
2394 Specify a library to use for auditing dependencies\n"));
2396 --disable-new-dtags Disable new dynamic tags\n"));
2398 --enable-new-dtags Enable new dynamic tags\n"));
2400 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2402 --exclude-libs=LIBS Make all symbols in LIBS hidden\n"));
2404 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2406 -z combreloc Merge dynamic relocs into one section and sort\n"));
2412 -z common-page-size=SIZE Set common page size to SIZE\n"));
2414 -z defs Report unresolved symbols in object files.\n"));
2416 -z execstack Mark executable as requiring executable stack\n"));
2419 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2422 -z initfirst Mark DSO to be initialized first at runtime\n"));
2424 -z interpose Mark object to interpose all DSOs but executable\n"));
2426 -z lazy Mark object lazy runtime binding (default)\n"));
2428 -z loadfltr Mark object requiring immediate process\n"));
2434 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2436 -z muldefs Allow multiple definitions\n"));
2439 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2442 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2444 -z nocopyreloc Don't create copy relocs\n"));
2446 -z nodefaultlib Mark object not to use default search paths\n"));
2448 -z nodelete Mark DSO non-deletable at runtime\n"));
2450 -z nodlopen Mark DSO not available to dlopen\n"));
2452 -z nodump Mark DSO not available to dldump\n"));
2457 -z noexecstack Mark executable as not requiring executable stack\n"));
2459 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2462 -z norelro Don't create RELRO program header\n"));
2464 -z now Mark object non-lazy runtime binding\n"));
2466 -z origin Mark object requiring immediate \$ORIGIN\n\
2467 processing at runtime\n"));
2469 -z relro Create RELRO program header\n"));
2473 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2475 $PARSE_AND_LIST_OPTIONS
2483 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2485 $PARSE_AND_LIST_EPILOGUE
2492 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2494 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2495 ${LDEMUL_SYSLIB-syslib_default},
2496 ${LDEMUL_HLL-hll_default},
2497 ${LDEMUL_AFTER_PARSE-after_parse_default},
2498 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2499 ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},
2500 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2501 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2502 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2503 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2504 "${EMULATION_NAME}",
2506 ${LDEMUL_FINISH-finish_default},
2507 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2508 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2509 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2510 ${LDEMUL_SET_SYMBOLS-NULL},
2511 ${LDEMUL_PARSE_ARGS-NULL},
2512 gld${EMULATION_NAME}_add_options,
2513 gld${EMULATION_NAME}_handle_option,
2514 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2515 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2516 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2517 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2518 ${LDEMUL_NEW_VERS_PATTERN-NULL}