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 ${EMULATION_NAME}
15 Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
16 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
17 Written by Steve Chamberlain <sac@cygnus.com>
18 ELF support by Ian Lance Taylor <ian@cygnus.com>
20 This file is part of the GNU Binutils.
22 This program is free software; you can redistribute it and/or modify
23 it under the terms of the GNU General Public License as published by
24 the Free Software Foundation; either version 3 of the License, or
25 (at your option) any later version.
27 This program is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 GNU General Public License for more details.
32 You should have received a copy of the GNU General Public License
33 along with this program; if not, write to the Free Software
34 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
35 MA 02110-1301, USA. */
37 #define TARGET_IS_${EMULATION_NAME}
41 #include "libiberty.h"
42 #include "safe-ctype.h"
58 #include "elf/common.h"
61 /* Declare functions used by various EXTRA_EM_FILEs. */
62 static void gld${EMULATION_NAME}_before_parse (void);
63 static void gld${EMULATION_NAME}_after_open (void);
64 static void gld${EMULATION_NAME}_before_allocation (void);
65 static bfd_boolean gld${EMULATION_NAME}_place_orphan (asection *s);
66 static void gld${EMULATION_NAME}_finish (void);
70 if [ "x${USE_LIBPATH}" = xyes ] ; then
72 *-*-linux-* | *-*-k*bsd*-*)
82 # Import any needed special functions and/or overrides.
84 source_em ${srcdir}/emultempl/elf-generic.em
85 if test -n "$EXTRA_EM_FILE" ; then
86 source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
89 # Functions in this file can be overridden by setting the LDEMUL_* shell
90 # variables. If the name of the overriding function is the same as is
91 # defined in this file, then don't output this file's version.
92 # If a different overriding name is given then output the standard function
93 # as presumably it is called from the overriding function.
95 if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
99 gld${EMULATION_NAME}_before_parse (void)
101 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
102 config.dynamic_link = ${DYNAMIC_LINK-TRUE};
103 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
109 if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
111 /* Handle as_needed DT_NEEDED. */
114 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
118 /* Tell the ELF linker that we don't want the output file to have a
119 DT_NEEDED entry for this file, unless it is used to resolve
120 references in a regular object. */
121 if (entry->as_needed)
122 class = DYN_AS_NEEDED;
124 /* Tell the ELF linker that we don't want the output file to have a
125 DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
127 if (!entry->add_needed)
128 class |= DYN_NO_ADD_NEEDED;
130 if (entry->just_syms_flag
131 && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
132 einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
136 || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
139 bfd_elf_set_dyn_lib_class (entry->the_bfd, class);
141 /* Continue on with normal load_symbols processing. */
149 /* These variables are required to pass information back and forth
150 between after_open and check_needed and stat_needed and vercheck. */
152 static struct bfd_link_needed_list *global_needed;
153 static struct stat global_stat;
154 static lang_input_statement_type *global_found;
155 static struct bfd_link_needed_list *global_vercheck_needed;
156 static bfd_boolean global_vercheck_failed;
159 /* On Linux, it's possible to have different versions of the same
160 shared library linked against different versions of libc. The
161 dynamic linker somehow tags which libc version to use in
162 /etc/ld.so.cache, and, based on the libc that it sees in the
163 executable, chooses which version of the shared library to use.
165 We try to do a similar check here by checking whether this shared
166 library needs any other shared libraries which may conflict with
167 libraries we have already included in the link. If it does, we
168 skip it, and try to find another shared library farther on down the
171 This is called via lang_for_each_input_file.
172 GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
173 which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find
174 a conflicting version. */
177 gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)
180 struct bfd_link_needed_list *l;
182 if (global_vercheck_failed)
184 if (s->the_bfd == NULL
185 || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
188 soname = bfd_elf_get_dt_soname (s->the_bfd);
190 soname = lbasename (bfd_get_filename (s->the_bfd));
192 for (l = global_vercheck_needed; l != NULL; l = l->next)
196 if (strcmp (soname, l->name) == 0)
198 /* Probably can't happen, but it's an easy check. */
202 if (strchr (l->name, '/') != NULL)
205 suffix = strstr (l->name, ".so.");
209 suffix += sizeof ".so." - 1;
211 if (strncmp (soname, l->name, suffix - l->name) == 0)
213 /* Here we know that S is a dynamic object FOO.SO.VER1, and
214 the object we are considering needs a dynamic object
215 FOO.SO.VER2, and VER1 and VER2 are different. This
216 appears to be a version mismatch, so we tell the caller
217 to try a different version of this library. */
218 global_vercheck_failed = TRUE;
225 /* See if an input file matches a DT_NEEDED entry by running stat on
229 gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
235 if (global_found != NULL)
237 if (s->the_bfd == NULL)
240 /* If this input file was an as-needed entry, and wasn't found to be
241 needed at the stage it was linked, then don't say we have loaded it. */
242 if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
245 if (bfd_stat (s->the_bfd, &st) != 0)
247 einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
251 /* Some operating systems, e.g. Windows, do not provide a meaningful
252 st_ino; they always set it to zero. (Windows does provide a
253 meaningful st_dev.) Do not indicate a duplicate library in that
254 case. While there is no guarantee that a system that provides
255 meaningful inode numbers will never set st_ino to zero, this is
256 merely an optimization, so we do not need to worry about false
258 if (st.st_dev == global_stat.st_dev
259 && st.st_ino == global_stat.st_ino
266 /* We issue a warning if it looks like we are including two
267 different versions of the same shared library. For example,
268 there may be a problem if -lc picks up libc.so.6 but some other
269 shared library has a DT_NEEDED entry of libc.so.5. This is a
270 heuristic test, and it will only work if the name looks like
271 NAME.so.VERSION. FIXME: Depending on file names is error-prone.
272 If we really want to issue warnings about mixing version numbers
273 of shared libraries, we need to find a better way. */
275 if (strchr (global_needed->name, '/') != NULL)
277 suffix = strstr (global_needed->name, ".so.");
280 suffix += sizeof ".so." - 1;
282 soname = bfd_elf_get_dt_soname (s->the_bfd);
284 soname = lbasename (s->filename);
286 if (strncmp (soname, global_needed->name, suffix - global_needed->name) == 0)
287 einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
288 global_needed->name, global_needed->by, soname);
297 /* This function is called for each possible name for a dynamic object
298 named by a DT_NEEDED entry. The FORCE parameter indicates whether
299 to skip the check for a conflicting version. */
302 gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,
306 const char *name = needed->name;
310 abfd = bfd_openr (name, bfd_get_target (output_bfd));
313 if (! bfd_check_format (abfd, bfd_object))
318 if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
324 /* For DT_NEEDED, they have to match. */
325 if (abfd->xvec != output_bfd->xvec)
331 /* Check whether this object would include any conflicting library
332 versions. If FORCE is set, then we skip this check; we use this
333 the second time around, if we couldn't find any compatible
334 instance of the shared library. */
338 struct bfd_link_needed_list *needed;
340 if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
341 einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
345 global_vercheck_needed = needed;
346 global_vercheck_failed = FALSE;
347 lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
348 if (global_vercheck_failed)
351 /* Return FALSE to force the caller to move on to try
352 another file on the search path. */
356 /* But wait! It gets much worse. On Linux, if a shared
357 library does not use libc at all, we are supposed to skip
358 it the first time around in case we encounter a shared
359 library later on with the same name which does use the
360 version of libc that we want. This is much too horrible
361 to use on any system other than Linux. */
365 *-*-linux-* | *-*-k*bsd*-*)
368 struct bfd_link_needed_list *l;
370 for (l = needed; l != NULL; l = l->next)
371 if (CONST_STRNEQ (l->name, "libc.so"))
387 /* We've found a dynamic object matching the DT_NEEDED entry. */
389 /* We have already checked that there is no other input file of the
390 same name. We must now check again that we are not including the
391 same file twice. We need to do this because on many systems
392 libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
393 reference libc.so.1. If we have already included libc.so, we
394 don't want to include libc.so.1 if they are the same file, and we
395 can only check that using stat. */
397 if (bfd_stat (abfd, &global_stat) != 0)
398 einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
400 /* First strip off everything before the last '/'. */
401 soname = lbasename (abfd->filename);
403 if (trace_file_tries)
404 info_msg (_("found %s at %s\n"), soname, name);
407 lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
408 if (global_found != NULL)
410 /* Return TRUE to indicate that we found the file, even though
411 we aren't going to do anything with it. */
415 /* Specify the soname to use. */
416 bfd_elf_set_dt_needed_name (abfd, soname);
418 /* Tell the ELF linker that we don't want the output file to have a
419 DT_NEEDED entry for this file, unless it is used to resolve
420 references in a regular object. */
421 class = DYN_DT_NEEDED;
423 /* Tell the ELF linker that we don't want the output file to have a
424 DT_NEEDED entry for this file at all if the entry is from a file
425 with DYN_NO_ADD_NEEDED. */
426 if (needed->by != NULL
427 && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
428 class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;
430 bfd_elf_set_dyn_lib_class (abfd, class);
432 /* Add this file into the symbol table. */
433 if (! bfd_link_add_symbols (abfd, &link_info))
434 einfo ("%F%B: could not read symbols: %E\n", abfd);
440 /* Search for a needed file in a path. */
443 gld${EMULATION_NAME}_search_needed (const char *path,
444 struct dt_needed *n, int force)
447 const char *name = n->name;
449 struct dt_needed needed;
452 return gld${EMULATION_NAME}_try_needed (n, force);
454 if (path == NULL || *path == '\0')
458 needed.name = n->name;
463 char *filename, *sset;
465 s = strchr (path, config.rpath_separator);
467 s = path + strlen (path);
469 filename = (char *) xmalloc (s - path + len + 2);
474 memcpy (filename, path, s - path);
475 filename[s - path] = '/';
476 sset = filename + (s - path) + 1;
480 needed.name = filename;
481 if (gld${EMULATION_NAME}_try_needed (&needed, force))
495 if [ "x${USE_LIBPATH}" = xyes ] ; then
498 /* Add the sysroot to every entry in a path separated by
499 config.rpath_separator. */
502 gld${EMULATION_NAME}_add_sysroot (const char *path)
511 if (path[i++] == config.rpath_separator)
517 len = len + (colons + 1) * strlen (ld_sysroot);
518 ret = xmalloc (len + 1);
519 strcpy (ret, ld_sysroot);
520 p = ret + strlen (ret);
523 if (path[i] == config.rpath_separator)
526 strcpy (p, ld_sysroot);
538 *-*-freebsd* | *-*-dragonfly*)
540 /* Read the system search path the FreeBSD way rather than the Linux way. */
541 #ifdef HAVE_ELF_HINTS_H
542 #include <elf-hints.h>
544 #include "elf-hints-local.h"
548 gld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force)
550 static bfd_boolean initialized;
551 static char *ld_elf_hints;
552 struct dt_needed needed;
559 tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
560 f = fopen (tmppath, FOPEN_RB);
564 struct elfhints_hdr hdr;
566 if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
567 && hdr.magic == ELFHINTS_MAGIC
570 if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
574 b = xmalloc (hdr.dirlistlen + 1);
575 if (fread (b, 1, hdr.dirlistlen + 1, f) ==
577 ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
588 if (ld_elf_hints == NULL)
593 return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,
600 *-*-linux-* | *-*-k*bsd*-*)
602 /* For a native linker, check the file /etc/ld.so.conf for directories
603 in which we may find shared libraries. /etc/ld.so.conf is really
604 only meaningful on Linux. */
606 struct gld${EMULATION_NAME}_ld_so_conf
613 gld${EMULATION_NAME}_parse_ld_so_conf
614 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);
617 gld${EMULATION_NAME}_parse_ld_so_conf_include
618 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,
626 if (pattern[0] != '/')
628 char *p = strrchr (filename, '/');
629 size_t patlen = strlen (pattern) + 1;
631 newp = xmalloc (p - filename + 1 + patlen);
632 memcpy (newp, filename, p - filename + 1);
633 memcpy (newp + (p - filename + 1), pattern, patlen);
638 if (glob (pattern, 0, NULL, &gl) == 0)
642 for (i = 0; i < gl.gl_pathc; ++i)
643 gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);
647 /* If we do not have glob, treat the pattern as a literal filename. */
648 gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);
656 gld${EMULATION_NAME}_parse_ld_so_conf
657 (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)
659 FILE *f = fopen (filename, FOPEN_RT);
667 line = xmalloc (linelen);
672 /* Normally this would use getline(3), but we need to be portable. */
673 while ((q = fgets (p, linelen - (p - line), f)) != NULL
674 && strlen (q) == linelen - (p - line) - 1
675 && line[linelen - 2] != '\n')
677 line = xrealloc (line, 2 * linelen);
678 p = line + linelen - 1;
682 if (q == NULL && p == line)
685 p = strchr (line, '\n');
689 /* Because the file format does not know any form of quoting we
690 can search forward for the next '#' character and if found
691 make it terminating the line. */
692 p = strchr (line, '#');
696 /* Remove leading whitespace. NUL is no whitespace character. */
698 while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
701 /* If the line is blank it is ignored. */
705 if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
711 while (*p == ' ' || *p == '\t')
719 while (*p != ' ' && *p != '\t' && *p)
725 gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,
733 while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
734 && *p != '\r' && *p != '\v')
737 while (p != dir && p[-1] == '/')
739 if (info->path == NULL)
741 info->alloc = p - dir + 1 + 256;
742 info->path = xmalloc (info->alloc);
747 if (info->len + 1 + (p - dir) >= info->alloc)
749 info->alloc += p - dir + 256;
750 info->path = xrealloc (info->path, info->alloc);
752 info->path[info->len++] = config.rpath_separator;
754 memcpy (info->path + info->len, dir, p - dir);
755 info->len += p - dir;
756 info->path[info->len] = '\0';
766 gld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force)
768 static bfd_boolean initialized;
769 static char *ld_so_conf;
770 struct dt_needed needed;
775 struct gld${EMULATION_NAME}_ld_so_conf info;
778 info.len = info.alloc = 0;
779 tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
780 (const char *) NULL);
781 if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
784 tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
785 (const char *) NULL);
786 gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);
792 char *d = gld${EMULATION_NAME}_add_sysroot (info.path);
799 if (ld_so_conf == NULL)
805 return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);
815 /* See if an input file matches a DT_NEEDED entry by name. */
818 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
822 /* Stop looking if we've found a loaded lib. */
823 if (global_found != NULL
824 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
825 & DYN_AS_NEEDED) == 0)
828 if (s->filename == NULL || s->the_bfd == NULL)
831 /* Don't look for a second non-loaded as-needed lib. */
832 if (global_found != NULL
833 && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
836 if (strcmp (s->filename, global_needed->name) == 0)
842 if (s->search_dirs_flag)
844 const char *f = strrchr (s->filename, '/');
846 && strcmp (f + 1, global_needed->name) == 0)
853 soname = bfd_elf_get_dt_soname (s->the_bfd);
855 && strcmp (soname, global_needed->name) == 0)
864 if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
868 gld${EMULATION_NAME}_id_note_section_size (bfd *abfd,
869 struct bfd_link_info *link_info)
871 const char *style = link_info->emit_note_gnu_build_id;
876 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
877 size = (size + 3) & -(bfd_size_type) 4;
879 if (!strcmp (style, "md5") || !strcmp (style, "uuid"))
881 else if (!strcmp (style, "sha1"))
883 else if (!strncmp (style, "0x", 2))
885 /* ID is in string form (hex). Convert to bits. */
886 const char *id = style + 2;
889 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
894 else if (*id == '-' || *id == ':')
901 } while (*id != '\0');
910 read_hex (const char xdigit)
912 if (ISDIGIT (xdigit))
914 if (ISUPPER (xdigit))
915 return xdigit - 'A' + 0xa;
916 if (ISLOWER (xdigit))
917 return xdigit - 'a' + 0xa;
929 gld${EMULATION_NAME}_write_build_id_section (bfd *abfd)
931 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
932 struct build_id_info *info =
933 elf_tdata (abfd)->after_write_object_contents_info;
935 Elf_Internal_Shdr *i_shdr;
936 unsigned char *contents, *id_bits;
938 Elf_External_Note *e_note;
941 if (bfd_is_abs_section (asec->output_section))
943 einfo (_("%P: warning: .note.gnu.build-id section discarded,"
944 " --build-id ignored.\n"));
947 i_shdr = &elf_section_data (asec->output_section)->this_hdr;
949 if (i_shdr->contents == NULL)
951 if (asec->contents == NULL)
952 asec->contents = xmalloc (asec->size);
953 contents = asec->contents;
956 contents = i_shdr->contents + asec->output_offset;
958 e_note = (void *) contents;
959 size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
960 size = (size + 3) & -(bfd_size_type) 4;
961 id_bits = contents + size;
962 size = asec->size - size;
964 bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
965 bfd_h_put_32 (abfd, size, &e_note->descsz);
966 bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
967 memcpy (e_note->name, "GNU", sizeof "GNU");
969 if (!strcmp (info->style, "md5"))
973 if (bed->s->checksum_contents (abfd,
974 (void (*) (const void *, size_t, void *))
977 md5_finish_ctx (&ctx, id_bits);
981 else if (!strcmp (info->style, "sha1"))
984 sha1_init_ctx (&ctx);
985 if (bed->s->checksum_contents (abfd,
986 (void (*) (const void *, size_t, void *))
989 sha1_finish_ctx (&ctx, id_bits);
993 else if (!strcmp (info->style, "uuid"))
996 int fd = open ("/dev/urandom", O_RDONLY);
999 n = read (fd, id_bits, size);
1004 else if (!strncmp (info->style, "0x", 2))
1006 /* ID is in string form (hex). Convert to bits. */
1007 const char *id = info->style + 2;
1011 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
1013 id_bits[n] = read_hex (*id++) << 4;
1014 id_bits[n++] |= read_hex (*id++);
1016 else if (*id == '-' || *id == ':')
1019 abort (); /* Should have been validated earlier. */
1020 } while (*id != '\0');
1023 abort (); /* Should have been validated earlier. */
1026 return (bfd_seek (abfd,
1027 i_shdr->sh_offset + asec->output_offset, SEEK_SET) == 0
1028 && bfd_bwrite (contents, size, abfd) == size);
1032 /* This is called after all the input files have been opened. */
1035 gld${EMULATION_NAME}_after_open (void)
1037 struct bfd_link_needed_list *needed, *l;
1038 struct elf_link_hash_table *htab;
1040 htab = elf_hash_table (&link_info);
1041 if (!is_elf_hash_table (htab))
1044 if (link_info.emit_note_gnu_build_id)
1050 abfd = link_info.input_bfds;
1052 size = gld${EMULATION_NAME}_id_note_section_size (abfd, &link_info);
1055 einfo ("%P: warning: unrecognized --build-id style ignored.\n");
1056 free (link_info.emit_note_gnu_build_id);
1057 link_info.emit_note_gnu_build_id = NULL;
1061 s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id",
1062 SEC_ALLOC | SEC_LOAD
1063 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1064 | SEC_READONLY | SEC_DATA);
1065 if (s != NULL && bfd_set_section_alignment (abfd, s, 2))
1067 struct elf_obj_tdata *t = elf_tdata (output_bfd);
1068 struct build_id_info *b = xmalloc (sizeof *b);
1069 b->style = link_info.emit_note_gnu_build_id;
1071 elf_section_type (s) = SHT_NOTE;
1073 t->after_write_object_contents
1074 = &gld${EMULATION_NAME}_write_build_id_section;
1075 t->after_write_object_contents_info = b;
1079 einfo ("%P: warning: Cannot create .note.gnu.build-id section,"
1080 " --build-id ignored.\n");
1081 free (link_info.emit_note_gnu_build_id);
1082 link_info.emit_note_gnu_build_id = NULL;
1087 if (link_info.relocatable)
1090 if (link_info.eh_frame_hdr
1091 && !link_info.traditional_format)
1096 for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)
1098 s = bfd_get_section_by_name (abfd, ".eh_frame");
1099 if (s && s->size > 8 && !bfd_is_abs_section (s->output_section))
1104 const struct elf_backend_data *bed;
1106 bed = get_elf_backend_data (abfd);
1107 s = bfd_make_section_with_flags (abfd, ".eh_frame_hdr",
1108 bed->dynamic_sec_flags
1111 && bfd_set_section_alignment (abfd, s, 2))
1112 htab->eh_info.hdr_sec = s;
1114 einfo ("%P: warning: Cannot create .eh_frame_hdr section,"
1115 " --eh-frame-hdr ignored.\n");
1119 /* Get the list of files which appear in DT_NEEDED entries in
1120 dynamic objects included in the link (often there will be none).
1121 For each such file, we want to track down the corresponding
1122 library, and include the symbol table in the link. This is what
1123 the runtime dynamic linker will do. Tracking the files down here
1124 permits one dynamic object to include another without requiring
1125 special action by the person doing the link. Note that the
1126 needed list can actually grow while we are stepping through this
1128 if (!link_info.executable)
1130 needed = bfd_elf_get_needed_list (output_bfd, &link_info);
1131 for (l = needed; l != NULL; l = l->next)
1133 struct bfd_link_needed_list *ll;
1134 struct dt_needed n, nn;
1137 /* If the lib that needs this one was --as-needed and wasn't
1138 found to be needed, then this lib isn't needed either. */
1140 && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
1143 /* If we've already seen this file, skip it. */
1144 for (ll = needed; ll != l; ll = ll->next)
1146 || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
1147 && strcmp (ll->name, l->name) == 0)
1152 /* See if this file was included in the link explicitly. */
1154 global_found = NULL;
1155 lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
1156 if (global_found != NULL
1157 && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
1158 & DYN_AS_NEEDED) == 0)
1164 if (trace_file_tries)
1165 info_msg (_("%s needed by %B\n"), l->name, l->by);
1167 /* As-needed libs specified on the command line (or linker script)
1168 take priority over libs found in search dirs. */
1169 if (global_found != NULL)
1171 nn.name = global_found->filename;
1172 if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
1176 /* We need to find this file and include the symbol table. We
1177 want to search for the file in the same way that the dynamic
1178 linker will search. That means that we want to use
1179 rpath_link, rpath, then the environment variable
1180 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
1181 entries (native only), then the linker script LIB_SEARCH_DIRS.
1182 We do not search using the -L arguments.
1184 We search twice. The first time, we skip objects which may
1185 introduce version mismatches. The second time, we force
1186 their use. See gld${EMULATION_NAME}_vercheck comment. */
1187 for (force = 0; force < 2; force++)
1190 search_dirs_type *search;
1192 if [ "x${NATIVE}" = xyes ] ; then
1194 const char *lib_path;
1197 if [ "x${USE_LIBPATH}" = xyes ] ; then
1199 struct bfd_link_needed_list *rp;
1205 if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
1209 if [ "x${USE_LIBPATH}" = xyes ] ; then
1211 if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
1216 if [ "x${NATIVE}" = xyes ] ; then
1218 if (command_line.rpath_link == NULL
1219 && command_line.rpath == NULL)
1221 lib_path = (const char *) getenv ("LD_RUN_PATH");
1222 if (gld${EMULATION_NAME}_search_needed (lib_path, &n,
1226 lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
1227 if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))
1231 if [ "x${USE_LIBPATH}" = xyes ] ; then
1234 rp = bfd_elf_get_runpath_list (output_bfd, &link_info);
1235 for (; !found && rp != NULL; rp = rp->next)
1237 char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);
1238 found = (rp->by == l->by
1239 && gld${EMULATION_NAME}_search_needed (tmpname,
1249 if [ "x${USE_LIBPATH}" = xyes ] ; then
1251 *-*-freebsd* | *-*-dragonfly*)
1253 if (gld${EMULATION_NAME}_check_ld_elf_hints (l->name, force))
1259 *-*-linux-* | *-*-k*bsd*-*)
1262 if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
1270 len = strlen (l->name);
1271 for (search = search_head; search != NULL; search = search->next)
1275 if (search->cmdline)
1277 filename = (char *) xmalloc (strlen (search->name) + len + 2);
1278 sprintf (filename, "%s/%s", search->name, l->name);
1280 if (gld${EMULATION_NAME}_try_needed (&nn, force))
1293 einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
1303 /* Look through an expression for an assignment statement. */
1306 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1308 bfd_boolean provide = FALSE;
1310 switch (exp->type.node_class)
1316 /* We call record_link_assignment even if the symbol is defined.
1317 This is because if it is defined by a dynamic object, we
1318 actually want to use the value defined by the linker script,
1319 not the value from the dynamic object (because we are setting
1320 symbols like etext). If the symbol is defined by a regular
1321 object, then, as it happens, calling record_link_assignment
1323 if (strcmp (exp->assign.dst, ".") != 0)
1325 if (!bfd_elf_record_link_assignment (output_bfd, &link_info,
1326 exp->assign.dst, provide,
1327 exp->assign.hidden))
1328 einfo ("%P%F: failed to record assignment to %s: %E\n",
1331 gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1335 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1336 gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1340 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1341 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1342 gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1346 gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1355 /* This is called by the before_allocation routine via
1356 lang_for_each_statement. It locates any assignment statements, and
1357 tells the ELF backend about them, in case they are assignments to
1358 symbols which are referred to by dynamic objects. */
1361 gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s)
1363 if (s->header.type == lang_assignment_statement_enum)
1364 gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1369 if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
1370 if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
1371 ELF_INTERPRETER_SET_DEFAULT="
1372 if (sinterp != NULL)
1374 sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};
1375 sinterp->size = strlen ((char *) sinterp->contents) + 1;
1380 ELF_INTERPRETER_SET_DEFAULT=
1384 /* This is called after the sections have been attached to output
1385 sections, but before any sizes or addresses have been set. */
1388 gld${EMULATION_NAME}_before_allocation (void)
1393 if (link_info.hash->type == bfd_link_elf_hash_table)
1394 _bfd_elf_tls_setup (output_bfd, &link_info);
1396 /* If we are going to make any variable assignments, we need to let
1397 the ELF backend know about them in case the variables are
1398 referred to by dynamic objects. */
1399 lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
1401 /* Let the ELF backend work out the sizes of any sections required
1402 by dynamic linking. */
1403 rpath = command_line.rpath;
1405 rpath = (const char *) getenv ("LD_RUN_PATH");
1406 if (! (bfd_elf_size_dynamic_sections
1407 (output_bfd, command_line.soname, rpath,
1408 command_line.filter_shlib,
1409 (const char * const *) command_line.auxiliary_filters,
1410 &link_info, &sinterp, lang_elf_version_info)))
1411 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1413 ${ELF_INTERPRETER_SET_DEFAULT}
1414 /* Let the user override the dynamic linker we are using. */
1415 if (command_line.interpreter != NULL
1418 sinterp->contents = (bfd_byte *) command_line.interpreter;
1419 sinterp->size = strlen (command_line.interpreter) + 1;
1422 /* Look for any sections named .gnu.warning. As a GNU extensions,
1423 we treat such sections as containing warning messages. We print
1424 out the warning message, and then zero out the section size so
1425 that it does not get copied into the output file. */
1428 LANG_FOR_EACH_INPUT_STATEMENT (is)
1435 if (is->just_syms_flag)
1438 s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
1443 msg = xmalloc ((size_t) (sz + 1));
1444 if (! bfd_get_section_contents (is->the_bfd, s, msg,
1446 einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
1449 ret = link_info.callbacks->warning (&link_info, msg,
1450 (const char *) NULL,
1451 is->the_bfd, (asection *) NULL,
1456 /* Clobber the section size, so that we don't waste space
1457 copying the warning into the output file. If we've already
1458 sized the output section, adjust its size. The adjustment
1459 is on rawsize because targets that size sections early will
1460 have called lang_reset_memory_regions after sizing. */
1461 if (s->output_section != NULL
1462 && s->output_section->rawsize >= s->size)
1463 s->output_section->rawsize -= s->size;
1467 /* Also set SEC_EXCLUDE, so that local symbols defined in the
1468 warning section don't get copied to the output. */
1469 s->flags |= SEC_EXCLUDE | SEC_KEEP;
1473 before_allocation_default ();
1475 if (!bfd_elf_size_dynsym_hash_dynstr (output_bfd, &link_info))
1476 einfo ("%P%F: failed to set dynamic section sizes: %E\n");
1482 if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
1485 /* Try to open a dynamic archive. This is where we know that ELF
1486 dynamic libraries have an extension of .so (or .sl on oddball systems
1490 gld${EMULATION_NAME}_open_dynamic_archive
1491 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
1493 const char *filename;
1496 if (! entry->is_archive)
1499 filename = entry->filename;
1501 /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
1502 is defined, but it does not seem worth the headache to optimize
1503 away those two bytes of space. */
1504 string = (char *) xmalloc (strlen (search->name)
1507 #ifdef EXTRA_SHLIB_EXTENSION
1508 + strlen (EXTRA_SHLIB_EXTENSION)
1510 + sizeof "/lib.so");
1512 sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
1514 #ifdef EXTRA_SHLIB_EXTENSION
1515 /* Try the .so extension first. If that fails build a new filename
1516 using EXTRA_SHLIB_EXTENSION. */
1517 if (! ldfile_try_open_bfd (string, entry))
1518 sprintf (string, "%s/lib%s%s%s", search->name,
1519 filename, arch, EXTRA_SHLIB_EXTENSION);
1522 if (! ldfile_try_open_bfd (string, entry))
1528 entry->filename = string;
1530 /* We have found a dynamic object to include in the link. The ELF
1531 backend linker will create a DT_NEEDED entry in the .dynamic
1532 section naming this file. If this file includes a DT_SONAME
1533 entry, it will be used. Otherwise, the ELF linker will just use
1534 the name of the file. For an archive found by searching, like
1535 this one, the DT_NEEDED entry should consist of just the name of
1536 the file, without the path information used to find it. Note
1537 that we only need to do this if we have a dynamic object; an
1538 archive will never be referenced by a DT_NEEDED entry.
1540 FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
1541 very pretty. I haven't been able to think of anything that is
1543 if (bfd_check_format (entry->the_bfd, bfd_object)
1544 && (entry->the_bfd->flags & DYNAMIC) != 0)
1546 ASSERT (entry->is_archive && entry->search_dirs_flag);
1548 /* Rather than duplicating the logic above. Just use the
1549 filename we recorded earlier. */
1551 filename = lbasename (entry->filename);
1552 bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
1561 if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
1564 /* A variant of lang_output_section_find used by place_orphan. */
1566 static lang_output_section_statement_type *
1567 output_rel_find (asection *sec, int isdyn)
1569 lang_output_section_statement_type *lookup;
1570 lang_output_section_statement_type *last = NULL;
1571 lang_output_section_statement_type *last_alloc = NULL;
1572 lang_output_section_statement_type *last_ro_alloc = NULL;
1573 lang_output_section_statement_type *last_rel = NULL;
1574 lang_output_section_statement_type *last_rel_alloc = NULL;
1575 int rela = sec->name[4] == 'a';
1577 for (lookup = &lang_output_section_statement.head->output_section_statement;
1579 lookup = lookup->next)
1581 if (lookup->constraint != -1
1582 && CONST_STRNEQ (lookup->name, ".rel"))
1584 int lookrela = lookup->name[4] == 'a';
1586 /* .rel.dyn must come before all other reloc sections, to suit
1591 /* Don't place after .rel.plt as doing so results in wrong
1593 if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
1596 if (rela == lookrela || last_rel == NULL)
1598 if ((rela == lookrela || last_rel_alloc == NULL)
1599 && lookup->bfd_section != NULL
1600 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1601 last_rel_alloc = lookup;
1605 if (lookup->bfd_section != NULL
1606 && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
1608 last_alloc = lookup;
1609 if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
1610 last_ro_alloc = lookup;
1615 return last_rel_alloc;
1621 return last_ro_alloc;
1629 /* Place an orphan section. We use this to put random SHF_ALLOC
1630 sections in the right segment. */
1633 gld${EMULATION_NAME}_place_orphan (asection *s)
1635 static struct orphan_save hold[] =
1638 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
1641 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1644 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
1650 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1653 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
1656 SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
1659 enum orphan_save_index
1669 static int orphan_init_done = 0;
1670 struct orphan_save *place;
1671 const char *secname;
1672 lang_output_section_statement_type *after;
1673 lang_output_section_statement_type *os;
1675 int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
1676 unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
1678 secname = bfd_get_section_name (s->owner, s);
1680 if (! link_info.relocatable
1681 && link_info.combreloc
1682 && (s->flags & SEC_ALLOC))
1688 secname = ".rela.dyn";
1692 secname = ".rel.dyn";
1698 else if (CONST_STRNEQ (secname, ".rel"))
1700 secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
1705 if (isdyn || (!config.unique_orphan_sections && !unique_section_p (s)))
1707 /* Look through the script to see where to place this section. */
1708 os = lang_output_section_find (secname);
1711 && (os->bfd_section == NULL
1712 || os->bfd_section->flags == 0
1713 || (_bfd_elf_match_sections_by_type (output_bfd,
1716 && ((s->flags ^ os->bfd_section->flags)
1717 & (SEC_LOAD | SEC_ALLOC)) == 0)))
1719 /* We already have an output section statement with this
1720 name, and its bfd section, if any, has compatible flags.
1721 If the section already exists but does not have any flags
1722 set, then it has been created by the linker, probably as a
1723 result of a --section-start command line switch. */
1724 lang_add_section (&os->children, s, os);
1729 if (!orphan_init_done)
1731 struct orphan_save *ho;
1732 for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
1733 if (ho->name != NULL)
1735 ho->os = lang_output_section_find (ho->name);
1736 if (ho->os != NULL && ho->os->flags == 0)
1737 ho->os->flags = ho->flags;
1739 orphan_init_done = 1;
1742 /* If this is a final link, then always put .gnu.warning.SYMBOL
1743 sections into the .text section to get them out of the way. */
1744 if (link_info.executable
1745 && ! link_info.relocatable
1746 && CONST_STRNEQ (secname, ".gnu.warning.")
1747 && hold[orphan_text].os != NULL)
1749 lang_add_section (&hold[orphan_text].os->children, s,
1750 hold[orphan_text].os);
1754 /* Decide which segment the section should go in based on the
1755 section name and section flags. We put loadable .note sections
1756 right after the .interp section, so that the PT_NOTE segment is
1757 stored right after the program headers where the OS can read it
1758 in the first page. */
1761 if ((s->flags & SEC_ALLOC) == 0)
1763 else if ((s->flags & SEC_LOAD) != 0
1764 && ((iself && sh_type == SHT_NOTE)
1765 || (!iself && CONST_STRNEQ (secname, ".note"))))
1766 place = &hold[orphan_interp];
1767 else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
1768 place = &hold[orphan_bss];
1769 else if ((s->flags & SEC_SMALL_DATA) != 0)
1770 place = &hold[orphan_sdata];
1771 else if ((s->flags & SEC_READONLY) == 0)
1772 place = &hold[orphan_data];
1773 else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
1774 || (!iself && CONST_STRNEQ (secname, ".rel")))
1775 && (s->flags & SEC_LOAD) != 0)
1776 place = &hold[orphan_rel];
1777 else if ((s->flags & SEC_CODE) == 0)
1778 place = &hold[orphan_rodata];
1780 place = &hold[orphan_text];
1785 if (place->os == NULL)
1787 if (place->name != NULL)
1788 place->os = lang_output_section_find (place->name);
1790 place->os = output_rel_find (s, isdyn);
1794 after = lang_output_section_find_by_flags
1795 (s, &place->os, _bfd_elf_match_sections_by_type);
1797 /* *ABS* is always the first output section statement. */
1798 after = &lang_output_section_statement.head->output_section_statement;
1801 /* Choose a unique name for the section. This will be needed if the
1802 same section name appears in the input file with different
1803 loadable or allocatable characteristics. */
1804 if (bfd_get_section_by_name (output_bfd, secname) != NULL)
1806 static int count = 1;
1807 secname = bfd_get_unique_section_name (output_bfd, secname, &count);
1808 if (secname == NULL)
1809 einfo ("%F%P: place_orphan failed: %E\n");
1812 lang_insert_orphan (s, secname, after, place, NULL, NULL);
1819 if test x"$LDEMUL_FINISH" != xgld"$EMULATION_NAME"_finish; then
1823 gld${EMULATION_NAME}_finish (void)
1825 bfd_boolean need_layout = bfd_elf_discard_info (output_bfd, &link_info);
1827 gld${EMULATION_NAME}_map_segments (need_layout);
1833 if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
1837 gld${EMULATION_NAME}_get_script (int *isfile)
1840 if test -n "$COMPILE_IN"
1842 # Scripts compiled in.
1844 # sed commands to quote an ld script as a C string.
1845 sc="-f stringify.sed"
1851 if (link_info.relocatable && config.build_constructors)
1854 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
1855 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
1856 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
1857 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
1858 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
1859 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else
1860 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1861 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
1863 if test -n "$GENERATE_PIE_SCRIPT" ; then
1864 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1865 echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c
1866 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1867 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1868 sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c
1869 echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1870 sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c
1872 echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c
1873 sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c
1875 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1876 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1877 echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c
1878 echo ' && link_info.relro' >> e${EMULATION_NAME}.c
1879 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1880 sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c
1881 echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
1882 sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
1884 echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
1885 sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
1887 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1888 echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c
1889 echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c
1890 sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c
1891 echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
1892 sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c
1894 echo ' ; else return' >> e${EMULATION_NAME}.c
1895 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
1896 echo '; }' >> e${EMULATION_NAME}.c
1899 # Scripts read from the filesystem.
1905 if (link_info.relocatable && config.build_constructors)
1906 return "ldscripts/${EMULATION_NAME}.xu";
1907 else if (link_info.relocatable)
1908 return "ldscripts/${EMULATION_NAME}.xr";
1909 else if (!config.text_read_only)
1910 return "ldscripts/${EMULATION_NAME}.xbn";
1912 if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :
1915 else if (!config.magic_demand_paged)
1916 return "ldscripts/${EMULATION_NAME}.xn";
1919 if test -n "$GENERATE_PIE_SCRIPT" ; then
1920 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1922 else if (link_info.pie && link_info.combreloc
1923 && link_info.relro && (link_info.flags & DF_BIND_NOW))
1924 return "ldscripts/${EMULATION_NAME}.xdw";
1925 else if (link_info.pie && link_info.combreloc)
1926 return "ldscripts/${EMULATION_NAME}.xdc";
1930 else if (link_info.pie)
1931 return "ldscripts/${EMULATION_NAME}.xd";
1934 if test -n "$GENERATE_SHLIB_SCRIPT" ; then
1935 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1937 else if (link_info.shared && link_info.combreloc
1938 && link_info.relro && (link_info.flags & DF_BIND_NOW))
1939 return "ldscripts/${EMULATION_NAME}.xsw";
1940 else if (link_info.shared && link_info.combreloc)
1941 return "ldscripts/${EMULATION_NAME}.xsc";
1945 else if (link_info.shared)
1946 return "ldscripts/${EMULATION_NAME}.xs";
1949 if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then
1951 else if (link_info.combreloc && link_info.relro
1952 && (link_info.flags & DF_BIND_NOW))
1953 return "ldscripts/${EMULATION_NAME}.xw";
1954 else if (link_info.combreloc)
1955 return "ldscripts/${EMULATION_NAME}.xc";
1960 return "ldscripts/${EMULATION_NAME}.x";
1967 if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1969 if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
1971 $PARSE_AND_LIST_PROLOGUE
1977 #define OPTION_DISABLE_NEW_DTAGS (400)
1978 #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
1979 #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
1980 #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)
1981 #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)
1982 #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)
1983 #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)
1986 gld${EMULATION_NAME}_add_options
1987 (int ns, char **shortopts, int nl, struct option **longopts,
1988 int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
1990 static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";
1991 static const struct option xtra_long[] = {
1992 {"build-id", optional_argument, NULL, OPTION_BUILD_ID},
1995 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
1997 {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
1998 {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
1999 {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
2000 {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},
2001 {"hash-style", required_argument, NULL, OPTION_HASH_STYLE},
2002 {"Bgroup", no_argument, NULL, OPTION_GROUP},
2006 if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
2008 $PARSE_AND_LIST_LONGOPTS
2013 {NULL, no_argument, NULL, 0}
2016 *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
2017 memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
2018 *longopts = (struct option *)
2019 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
2020 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
2023 #define DEFAULT_BUILD_ID_STYLE "sha1"
2026 gld${EMULATION_NAME}_handle_option (int optc)
2033 case OPTION_BUILD_ID:
2034 if (link_info.emit_note_gnu_build_id != NULL)
2036 free (link_info.emit_note_gnu_build_id);
2037 link_info.emit_note_gnu_build_id = NULL;
2040 optarg = DEFAULT_BUILD_ID_STYLE;
2041 if (strcmp (optarg, "none"))
2042 link_info.emit_note_gnu_build_id = xstrdup (optarg);
2047 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2049 case OPTION_DISABLE_NEW_DTAGS:
2050 link_info.new_dtags = FALSE;
2053 case OPTION_ENABLE_NEW_DTAGS:
2054 link_info.new_dtags = TRUE;
2057 case OPTION_EH_FRAME_HDR:
2058 link_info.eh_frame_hdr = TRUE;
2062 link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
2063 /* Groups must be self-contained. */
2064 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2065 link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
2068 case OPTION_EXCLUDE_LIBS:
2069 add_excluded_libs (optarg);
2072 case OPTION_HASH_STYLE:
2073 link_info.emit_hash = FALSE;
2074 link_info.emit_gnu_hash = FALSE;
2075 if (strcmp (optarg, "sysv") == 0)
2076 link_info.emit_hash = TRUE;
2077 else if (strcmp (optarg, "gnu") == 0)
2078 link_info.emit_gnu_hash = TRUE;
2079 else if (strcmp (optarg, "both") == 0)
2081 link_info.emit_hash = TRUE;
2082 link_info.emit_gnu_hash = TRUE;
2085 einfo (_("%P%F: invalid hash style \`%s'\n"), optarg);
2089 if (strcmp (optarg, "initfirst") == 0)
2090 link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
2091 else if (strcmp (optarg, "interpose") == 0)
2092 link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
2093 else if (strcmp (optarg, "loadfltr") == 0)
2094 link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
2095 else if (strcmp (optarg, "nodefaultlib") == 0)
2096 link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
2097 else if (strcmp (optarg, "nodelete") == 0)
2098 link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
2099 else if (strcmp (optarg, "nodlopen") == 0)
2100 link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
2101 else if (strcmp (optarg, "nodump") == 0)
2102 link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
2103 else if (strcmp (optarg, "now") == 0)
2105 link_info.flags |= (bfd_vma) DF_BIND_NOW;
2106 link_info.flags_1 |= (bfd_vma) DF_1_NOW;
2108 else if (strcmp (optarg, "lazy") == 0)
2110 link_info.flags &= ~(bfd_vma) DF_BIND_NOW;
2111 link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;
2113 else if (strcmp (optarg, "origin") == 0)
2115 link_info.flags |= (bfd_vma) DF_ORIGIN;
2116 link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
2118 else if (strcmp (optarg, "defs") == 0)
2119 link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
2120 else if (strcmp (optarg, "muldefs") == 0)
2121 link_info.allow_multiple_definition = TRUE;
2122 else if (strcmp (optarg, "combreloc") == 0)
2123 link_info.combreloc = TRUE;
2124 else if (strcmp (optarg, "nocombreloc") == 0)
2125 link_info.combreloc = FALSE;
2126 else if (strcmp (optarg, "nocopyreloc") == 0)
2127 link_info.nocopyreloc = TRUE;
2128 else if (strcmp (optarg, "execstack") == 0)
2130 link_info.execstack = TRUE;
2131 link_info.noexecstack = FALSE;
2133 else if (strcmp (optarg, "noexecstack") == 0)
2135 link_info.noexecstack = TRUE;
2136 link_info.execstack = FALSE;
2140 if test -n "$COMMONPAGESIZE"; then
2142 else if (strcmp (optarg, "relro") == 0)
2143 link_info.relro = TRUE;
2144 else if (strcmp (optarg, "norelro") == 0)
2145 link_info.relro = FALSE;
2150 else if (CONST_STRNEQ (optarg, "max-page-size="))
2154 config.maxpagesize = strtoul (optarg + 14, &end, 0);
2155 if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)
2156 einfo (_("%P%F: invalid maxium page size \`%s'\n"),
2158 ASSERT (default_target != NULL);
2159 bfd_emul_set_maxpagesize (default_target, config.maxpagesize);
2161 else if (CONST_STRNEQ (optarg, "common-page-size="))
2164 config.commonpagesize = strtoul (optarg + 17, &end, 0);
2166 || (config.commonpagesize & (config.commonpagesize - 1)) != 0)
2167 einfo (_("%P%F: invalid common page size \`%s'\n"),
2169 ASSERT (default_target != NULL);
2170 bfd_emul_set_commonpagesize (default_target,
2171 config.commonpagesize);
2173 /* What about the other Solaris -z options? FIXME. */
2178 if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
2180 $PARSE_AND_LIST_ARGS_CASES
2192 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2196 gld${EMULATION_NAME}_list_options (FILE * file)
2199 --build-id[=STYLE] Generate build ID note\n"));
2202 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
2205 -Bgroup Selects group name lookup rules for DSO\n"));
2207 --disable-new-dtags Disable new dynamic tags\n"));
2209 --enable-new-dtags Enable new dynamic tags\n"));
2211 --eh-frame-hdr Create .eh_frame_hdr section\n"));
2213 --hash-style=STYLE Set hash style to sysv, gnu or both\n"));
2215 -z combreloc Merge dynamic relocs into one section and sort\n"));
2217 -z defs Report unresolved symbols in object files.\n"));
2219 -z execstack Mark executable as requiring executable stack\n"));
2221 -z initfirst Mark DSO to be initialized first at runtime\n"));
2223 -z interpose Mark object to interpose all DSOs but executable\n"));
2225 -z lazy Mark object lazy runtime binding (default)\n"));
2227 -z loadfltr Mark object requiring immediate process\n"));
2229 -z muldefs Allow multiple definitions\n"));
2231 -z nocombreloc Don't merge dynamic relocs into one section\n"));
2233 -z nocopyreloc Don't create copy relocs\n"));
2235 -z nodefaultlib Mark object not to use default search paths\n"));
2237 -z nodelete Mark DSO non-deletable at runtime\n"));
2239 -z nodlopen Mark DSO not available to dlopen\n"));
2241 -z nodump Mark DSO not available to dldump\n"));
2243 -z noexecstack Mark executable as not requiring executable stack\n"));
2246 if test -n "$COMMONPAGESIZE"; then
2249 -z norelro Don't create RELRO program header\n"));
2255 -z now Mark object non-lazy runtime binding\n"));
2257 -z origin Mark object requiring immediate \$ORIGIN\n\
2258 processing at runtime\n"));
2261 if test -n "$COMMONPAGESIZE"; then
2264 -z relro Create RELRO program header\n"));
2270 -z max-page-size=SIZE Set maximum page size to SIZE\n"));
2272 -z common-page-size=SIZE Set common page size to SIZE\n"));
2274 -z KEYWORD Ignored for Solaris compatibility\n"));
2278 if test -n "$PARSE_AND_LIST_OPTIONS" ; then
2280 $PARSE_AND_LIST_OPTIONS
2288 if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
2290 $PARSE_AND_LIST_EPILOGUE
2296 #define gld${EMULATION_NAME}_add_options NULL
2297 #define gld${EMULATION_NAME}_handle_option NULL
2299 if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
2301 #define gld${EMULATION_NAME}_list_options NULL
2308 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
2310 ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
2311 ${LDEMUL_SYSLIB-syslib_default},
2312 ${LDEMUL_HLL-hll_default},
2313 ${LDEMUL_AFTER_PARSE-after_parse_default},
2314 ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
2315 ${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
2316 ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
2317 ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
2318 ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
2319 ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
2320 "${EMULATION_NAME}",
2322 ${LDEMUL_FINISH-gld${EMULATION_NAME}_finish},
2323 ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
2324 ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
2325 ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
2326 ${LDEMUL_SET_SYMBOLS-NULL},
2327 ${LDEMUL_PARSE_ARGS-NULL},
2328 gld${EMULATION_NAME}_add_options,
2329 gld${EMULATION_NAME}_handle_option,
2330 ${LDEMUL_UNRECOGNIZED_FILE-NULL},
2331 ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
2332 ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},
2333 ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
2334 ${LDEMUL_NEW_VERS_PATTERN-NULL}