1 /* Linker command language support.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 Free Software Foundation, Inc.
6 This file is part of GLD, the Gnu Linker.
8 GLD is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GLD is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GLD; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 #include "libiberty.h"
26 #include "safe-ctype.h"
45 #define offsetof(TYPE, MEMBER) ((size_t) & (((TYPE*) 0)->MEMBER))
48 /* Locals variables. */
49 static struct obstack stat_obstack;
51 #define obstack_chunk_alloc xmalloc
52 #define obstack_chunk_free free
53 static const char *startup_file;
54 static lang_statement_list_type input_file_chain;
55 static bfd_boolean placed_commons = FALSE;
56 static lang_output_section_statement_type *default_common_section;
57 static bfd_boolean map_option_f;
58 static bfd_vma print_dot;
59 static lang_input_statement_type *first_file;
60 static const char *current_target;
61 static const char *output_target;
62 static lang_statement_list_type statement_list;
63 static struct lang_phdr *lang_phdr_list;
64 static struct bfd_hash_table lang_definedness_table;
66 /* Forward declarations. */
67 static void exp_init_os (etree_type *);
68 static bfd_boolean wildcardp (const char *);
69 static lang_input_statement_type *lookup_name (const char *);
70 static bfd_boolean load_symbols (lang_input_statement_type *,
71 lang_statement_list_type *);
72 static struct bfd_hash_entry *lang_definedness_newfunc
73 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
74 static void insert_undefined (const char *);
75 static void print_statement (lang_statement_union_type *,
76 lang_output_section_statement_type *);
77 static void print_statement_list (lang_statement_union_type *,
78 lang_output_section_statement_type *);
79 static void print_statements (void);
80 static bfd_boolean lang_one_common (struct bfd_link_hash_entry *, void *);
81 static void lang_record_phdrs (void);
82 static void lang_do_version_exports_section (void);
84 typedef void (*callback_t) (lang_wild_statement_type *, struct wildcard_list *,
85 asection *, lang_input_statement_type *, void *);
87 /* Exported variables. */
88 lang_output_section_statement_type *abs_output_section;
89 lang_statement_list_type lang_output_section_statement;
90 lang_statement_list_type *stat_ptr = &statement_list;
91 lang_statement_list_type file_chain = { NULL, NULL };
92 struct bfd_sym_chain entry_symbol = { NULL, NULL };
93 const char *entry_section = ".text";
94 bfd_boolean entry_from_cmdline;
95 bfd_boolean lang_has_input_file = FALSE;
96 bfd_boolean had_output_filename = FALSE;
97 bfd_boolean lang_float_flag = FALSE;
98 bfd_boolean delete_output_file_on_failure = FALSE;
99 struct lang_nocrossrefs *nocrossref_list;
100 struct unique_sections *unique_section_list;
101 static bfd_boolean ldlang_sysrooted_script = FALSE;
102 int lang_statement_iteration = 0;
104 etree_type *base; /* Relocation base - or null */
106 #define new_stat(x, y) \
107 (x##_type *) new_statement (x##_enum, sizeof (x##_type), y)
109 #define outside_section_address(q) \
110 ((q)->output_offset + (q)->output_section->vma)
112 #define outside_symbol_address(q) \
113 ((q)->value + outside_section_address (q->section))
115 #define SECTION_NAME_MAP_LENGTH (16)
118 stat_alloc (size_t size)
120 return obstack_alloc (&stat_obstack, size);
124 unique_section_p (const char *secnam)
126 struct unique_sections *unam;
128 for (unam = unique_section_list; unam; unam = unam->next)
129 if (wildcardp (unam->name)
130 ? fnmatch (unam->name, secnam, 0) == 0
131 : strcmp (unam->name, secnam) == 0)
139 /* Generic traversal routines for finding matching sections. */
142 walk_wild_section (lang_wild_statement_type *ptr,
143 lang_input_statement_type *file,
149 if (file->just_syms_flag)
152 for (s = file->the_bfd->sections; s != NULL; s = s->next)
154 struct wildcard_list *sec;
156 sec = ptr->section_list;
158 (*callback) (ptr, sec, s, file, data);
162 bfd_boolean skip = FALSE;
163 struct name_list *list_tmp;
165 /* Don't process sections from files which were
167 for (list_tmp = sec->spec.exclude_name_list;
169 list_tmp = list_tmp->next)
171 if (wildcardp (list_tmp->name))
172 skip = fnmatch (list_tmp->name, file->filename, 0) == 0;
174 skip = strcmp (list_tmp->name, file->filename) == 0;
176 /* If this file is part of an archive, and the archive is
177 excluded, exclude this file. */
178 if (! skip && file->the_bfd != NULL
179 && file->the_bfd->my_archive != NULL
180 && file->the_bfd->my_archive->filename != NULL)
182 if (wildcardp (list_tmp->name))
183 skip = fnmatch (list_tmp->name,
184 file->the_bfd->my_archive->filename,
187 skip = strcmp (list_tmp->name,
188 file->the_bfd->my_archive->filename) == 0;
195 if (!skip && sec->spec.name != NULL)
197 const char *sname = bfd_get_section_name (file->the_bfd, s);
199 if (wildcardp (sec->spec.name))
200 skip = fnmatch (sec->spec.name, sname, 0) != 0;
202 skip = strcmp (sec->spec.name, sname) != 0;
206 (*callback) (ptr, sec, s, file, data);
213 /* Handle a wild statement for a single file F. */
216 walk_wild_file (lang_wild_statement_type *s,
217 lang_input_statement_type *f,
221 if (f->the_bfd == NULL
222 || ! bfd_check_format (f->the_bfd, bfd_archive))
223 walk_wild_section (s, f, callback, data);
228 /* This is an archive file. We must map each member of the
229 archive separately. */
230 member = bfd_openr_next_archived_file (f->the_bfd, NULL);
231 while (member != NULL)
233 /* When lookup_name is called, it will call the add_symbols
234 entry point for the archive. For each element of the
235 archive which is included, BFD will call ldlang_add_file,
236 which will set the usrdata field of the member to the
237 lang_input_statement. */
238 if (member->usrdata != NULL)
240 walk_wild_section (s, member->usrdata, callback, data);
243 member = bfd_openr_next_archived_file (f->the_bfd, member);
249 walk_wild (lang_wild_statement_type *s, callback_t callback, void *data)
251 const char *file_spec = s->filename;
253 if (file_spec == NULL)
255 /* Perform the iteration over all files in the list. */
256 LANG_FOR_EACH_INPUT_STATEMENT (f)
258 walk_wild_file (s, f, callback, data);
261 else if (wildcardp (file_spec))
263 LANG_FOR_EACH_INPUT_STATEMENT (f)
265 if (fnmatch (file_spec, f->filename, FNM_FILE_NAME) == 0)
266 walk_wild_file (s, f, callback, data);
271 lang_input_statement_type *f;
273 /* Perform the iteration over a single file. */
274 f = lookup_name (file_spec);
276 walk_wild_file (s, f, callback, data);
280 /* lang_for_each_statement walks the parse tree and calls the provided
281 function for each node. */
284 lang_for_each_statement_worker (void (*func) (lang_statement_union_type *),
285 lang_statement_union_type *s)
287 for (; s != NULL; s = s->header.next)
291 switch (s->header.type)
293 case lang_constructors_statement_enum:
294 lang_for_each_statement_worker (func, constructor_list.head);
296 case lang_output_section_statement_enum:
297 lang_for_each_statement_worker
299 s->output_section_statement.children.head);
301 case lang_wild_statement_enum:
302 lang_for_each_statement_worker
304 s->wild_statement.children.head);
306 case lang_group_statement_enum:
307 lang_for_each_statement_worker (func,
308 s->group_statement.children.head);
310 case lang_data_statement_enum:
311 case lang_reloc_statement_enum:
312 case lang_object_symbols_statement_enum:
313 case lang_output_statement_enum:
314 case lang_target_statement_enum:
315 case lang_input_section_enum:
316 case lang_input_statement_enum:
317 case lang_assignment_statement_enum:
318 case lang_padding_statement_enum:
319 case lang_address_statement_enum:
320 case lang_fill_statement_enum:
330 lang_for_each_statement (void (*func) (lang_statement_union_type *))
332 lang_for_each_statement_worker (func, statement_list.head);
335 /*----------------------------------------------------------------------*/
338 lang_list_init (lang_statement_list_type *list)
341 list->tail = &list->head;
344 /* Build a new statement node for the parse tree. */
346 static lang_statement_union_type *
347 new_statement (enum statement_enum type,
349 lang_statement_list_type *list)
351 lang_statement_union_type *new;
353 new = stat_alloc (size);
354 new->header.type = type;
355 new->header.next = NULL;
356 lang_statement_append (list, new, &new->header.next);
360 /* Build a new input file node for the language. There are several
361 ways in which we treat an input file, eg, we only look at symbols,
362 or prefix it with a -l etc.
364 We can be supplied with requests for input files more than once;
365 they may, for example be split over several lines like foo.o(.text)
366 foo.o(.data) etc, so when asked for a file we check that we haven't
367 got it already so we don't duplicate the bfd. */
369 static lang_input_statement_type *
370 new_afile (const char *name,
371 lang_input_file_enum_type file_type,
373 bfd_boolean add_to_list)
375 lang_input_statement_type *p;
378 p = new_stat (lang_input_statement, stat_ptr);
381 p = stat_alloc (sizeof (lang_input_statement_type));
382 p->header.next = NULL;
385 lang_has_input_file = TRUE;
387 p->sysrooted = FALSE;
390 case lang_input_file_is_symbols_only_enum:
392 p->is_archive = FALSE;
394 p->local_sym_name = name;
395 p->just_syms_flag = TRUE;
396 p->search_dirs_flag = FALSE;
398 case lang_input_file_is_fake_enum:
400 p->is_archive = FALSE;
402 p->local_sym_name = name;
403 p->just_syms_flag = FALSE;
404 p->search_dirs_flag = FALSE;
406 case lang_input_file_is_l_enum:
407 p->is_archive = TRUE;
410 p->local_sym_name = concat ("-l", name, NULL);
411 p->just_syms_flag = FALSE;
412 p->search_dirs_flag = TRUE;
414 case lang_input_file_is_marker_enum:
416 p->is_archive = FALSE;
418 p->local_sym_name = name;
419 p->just_syms_flag = FALSE;
420 p->search_dirs_flag = TRUE;
422 case lang_input_file_is_search_file_enum:
423 p->sysrooted = ldlang_sysrooted_script;
425 p->is_archive = FALSE;
427 p->local_sym_name = name;
428 p->just_syms_flag = FALSE;
429 p->search_dirs_flag = TRUE;
431 case lang_input_file_is_file_enum:
433 p->is_archive = FALSE;
435 p->local_sym_name = name;
436 p->just_syms_flag = FALSE;
437 p->search_dirs_flag = FALSE;
444 p->next_real_file = NULL;
447 p->dynamic = config.dynamic_link;
448 p->whole_archive = whole_archive;
450 lang_statement_append (&input_file_chain,
451 (lang_statement_union_type *) p,
456 lang_input_statement_type *
457 lang_add_input_file (const char *name,
458 lang_input_file_enum_type file_type,
461 lang_has_input_file = TRUE;
462 return new_afile (name, file_type, target, TRUE);
465 /* Build enough state so that the parser can build its tree. */
470 obstack_begin (&stat_obstack, 1000);
472 stat_ptr = &statement_list;
474 lang_list_init (stat_ptr);
476 lang_list_init (&input_file_chain);
477 lang_list_init (&lang_output_section_statement);
478 lang_list_init (&file_chain);
479 first_file = lang_add_input_file (NULL, lang_input_file_is_marker_enum,
482 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME);
484 abs_output_section->bfd_section = bfd_abs_section_ptr;
486 /* The value "3" is ad-hoc, somewhat related to the expected number of
487 DEFINED expressions in a linker script. For most default linker
488 scripts, there are none. Why a hash table then? Well, it's somewhat
489 simpler to re-use working machinery than using a linked list in terms
490 of code-complexity here in ld, besides the initialization which just
491 looks like other code here. */
492 if (bfd_hash_table_init_n (&lang_definedness_table,
493 lang_definedness_newfunc, 3) != TRUE)
494 einfo (_("%P%F: out of memory during initialization"));
496 /* Callers of exp_fold_tree need to increment this. */
497 lang_statement_iteration = 0;
500 /*----------------------------------------------------------------------
501 A region is an area of memory declared with the
502 MEMORY { name:org=exp, len=exp ... }
505 We maintain a list of all the regions here.
507 If no regions are specified in the script, then the default is used
508 which is created when looked up to be the entire data space.
510 If create is true we are creating a region inside a MEMORY block.
511 In this case it is probably an error to create a region that has
512 already been created. If we are not inside a MEMORY block it is
513 dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION)
514 and so we issue a warning. */
516 static lang_memory_region_type *lang_memory_region_list;
517 static lang_memory_region_type **lang_memory_region_list_tail = &lang_memory_region_list;
519 lang_memory_region_type *
520 lang_memory_region_lookup (const char *const name, bfd_boolean create)
522 lang_memory_region_type *p;
523 lang_memory_region_type *new;
525 /* NAME is NULL for LMA memspecs if no region was specified. */
529 for (p = lang_memory_region_list; p != NULL; p = p->next)
530 if (strcmp (p->name, name) == 0)
533 einfo (_("%P:%S: warning: redeclaration of memory region '%s'\n"), name);
538 /* This code used to always use the first region in the list as the
539 default region. I changed it to instead use a region
540 encompassing all of memory as the default region. This permits
541 NOLOAD sections to work reasonably without requiring a region.
542 People should specify what region they mean, if they really want
544 if (strcmp (name, DEFAULT_MEMORY_REGION) == 0)
546 if (lang_memory_region_list != NULL)
547 return lang_memory_region_list;
551 if (!create && strcmp (name, DEFAULT_MEMORY_REGION))
552 einfo (_("%P:%S: warning: memory region %s not declared\n"), name);
554 new = stat_alloc (sizeof (lang_memory_region_type));
556 new->name = xstrdup (name);
559 *lang_memory_region_list_tail = new;
560 lang_memory_region_list_tail = &new->next;
564 new->length = ~(bfd_size_type) 0;
566 new->had_full_message = FALSE;
571 static lang_memory_region_type *
572 lang_memory_default (asection *section)
574 lang_memory_region_type *p;
576 flagword sec_flags = section->flags;
578 /* Override SEC_DATA to mean a writable section. */
579 if ((sec_flags & (SEC_ALLOC | SEC_READONLY | SEC_CODE)) == SEC_ALLOC)
580 sec_flags |= SEC_DATA;
582 for (p = lang_memory_region_list; p != NULL; p = p->next)
584 if ((p->flags & sec_flags) != 0
585 && (p->not_flags & sec_flags) == 0)
590 return lang_memory_region_lookup (DEFAULT_MEMORY_REGION, FALSE);
593 lang_output_section_statement_type *
594 lang_output_section_find (const char *const name)
596 lang_statement_union_type *u;
597 lang_output_section_statement_type *lookup;
599 for (u = lang_output_section_statement.head; u != NULL; u = lookup->next)
601 lookup = &u->output_section_statement;
602 if (strcmp (name, lookup->name) == 0)
608 lang_output_section_statement_type *
609 lang_output_section_statement_lookup (const char *const name)
611 lang_output_section_statement_type *lookup;
613 lookup = lang_output_section_find (name);
616 lookup = new_stat (lang_output_section_statement, stat_ptr);
617 lookup->region = NULL;
618 lookup->lma_region = NULL;
620 lookup->block_value = 1;
624 lookup->bfd_section = NULL;
625 lookup->processed = FALSE;
626 lookup->sectype = normal_section;
627 lookup->addr_tree = NULL;
628 lang_list_init (&lookup->children);
630 lookup->memspec = NULL;
632 lookup->subsection_alignment = -1;
633 lookup->section_alignment = -1;
634 lookup->load_base = NULL;
635 lookup->update_dot_tree = NULL;
636 lookup->phdrs = NULL;
638 lang_statement_append (&lang_output_section_statement,
639 (lang_statement_union_type *) lookup,
646 lang_map_flags (flagword flag)
648 if (flag & SEC_ALLOC)
654 if (flag & SEC_READONLY)
667 lang_memory_region_type *m;
669 minfo (_("\nMemory Configuration\n\n"));
670 fprintf (config.map_file, "%-16s %-18s %-18s %s\n",
671 _("Name"), _("Origin"), _("Length"), _("Attributes"));
673 for (m = lang_memory_region_list; m != NULL; m = m->next)
678 fprintf (config.map_file, "%-16s ", m->name);
680 sprintf_vma (buf, m->origin);
681 minfo ("0x%s ", buf);
689 minfo ("0x%V", m->length);
690 if (m->flags || m->not_flags)
698 lang_map_flags (m->flags);
704 lang_map_flags (m->not_flags);
711 fprintf (config.map_file, _("\nLinker script and memory map\n\n"));
716 /* Initialize an output section. */
719 init_os (lang_output_section_statement_type *s)
721 section_userdata_type *new;
723 if (s->bfd_section != NULL)
726 if (strcmp (s->name, DISCARD_SECTION_NAME) == 0)
727 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME);
729 new = stat_alloc (sizeof (section_userdata_type));
731 s->bfd_section = bfd_get_section_by_name (output_bfd, s->name);
732 if (s->bfd_section == NULL)
733 s->bfd_section = bfd_make_section (output_bfd, s->name);
734 if (s->bfd_section == NULL)
736 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
737 output_bfd->xvec->name, s->name);
739 s->bfd_section->output_section = s->bfd_section;
741 /* We initialize an output sections output offset to minus its own
742 vma to allow us to output a section through itself. */
743 s->bfd_section->output_offset = 0;
744 get_userdata (s->bfd_section) = new;
746 /* If there is a base address, make sure that any sections it might
747 mention are initialized. */
748 if (s->addr_tree != NULL)
749 exp_init_os (s->addr_tree);
751 if (s->load_base != NULL)
752 exp_init_os (s->load_base);
755 /* Make sure that all output sections mentioned in an expression are
759 exp_init_os (etree_type *exp)
761 switch (exp->type.node_class)
764 exp_init_os (exp->assign.src);
768 exp_init_os (exp->binary.lhs);
769 exp_init_os (exp->binary.rhs);
773 exp_init_os (exp->trinary.cond);
774 exp_init_os (exp->trinary.lhs);
775 exp_init_os (exp->trinary.rhs);
779 exp_init_os (exp->assert_s.child);
783 exp_init_os (exp->unary.child);
787 switch (exp->type.node_code)
793 lang_output_section_statement_type *os;
795 os = lang_output_section_find (exp->name.name);
796 if (os != NULL && os->bfd_section == NULL)
807 /* Sections marked with the SEC_LINK_ONCE flag should only be linked
808 once into the output. This routine checks each section, and
809 arrange to discard it if a section of the same name has already
810 been linked. If the section has COMDAT information, then it uses
811 that to decide whether the section should be included. This code
812 assumes that all relevant sections have the SEC_LINK_ONCE flag set;
813 that is, it does not depend solely upon the section name.
814 section_already_linked is called via bfd_map_over_sections. */
816 /* This is the shape of the elements inside the already_linked hash
817 table. It maps a name onto a list of already_linked elements with
818 the same name. It's possible to get more than one element in a
819 list if the COMDAT sections have different names. */
821 struct already_linked_hash_entry
823 struct bfd_hash_entry root;
824 struct already_linked *entry;
827 struct already_linked
829 struct already_linked *next;
833 /* The hash table. */
835 static struct bfd_hash_table already_linked_table;
838 section_already_linked (bfd *abfd, asection *sec, void *data)
840 lang_input_statement_type *entry = data;
843 struct already_linked *l;
844 struct already_linked_hash_entry *already_linked_list;
846 /* If we are only reading symbols from this object, then we want to
847 discard all sections. */
848 if (entry->just_syms_flag)
850 bfd_link_just_syms (sec, &link_info);
854 flags = bfd_get_section_flags (abfd, sec);
856 if ((flags & SEC_LINK_ONCE) == 0)
859 /* FIXME: When doing a relocatable link, we may have trouble
860 copying relocations in other sections that refer to local symbols
861 in the section being discarded. Those relocations will have to
862 be converted somehow; as of this writing I'm not sure that any of
863 the backends handle that correctly.
865 It is tempting to instead not discard link once sections when
866 doing a relocatable link (technically, they should be discarded
867 whenever we are building constructors). However, that fails,
868 because the linker winds up combining all the link once sections
869 into a single large link once section, which defeats the purpose
870 of having link once sections in the first place.
872 Also, not merging link once sections in a relocatable link
873 causes trouble for MIPS ELF, which relies on link once semantics
874 to handle the .reginfo section correctly. */
876 name = bfd_get_section_name (abfd, sec);
878 already_linked_list =
879 ((struct already_linked_hash_entry *)
880 bfd_hash_lookup (&already_linked_table, name, TRUE, FALSE));
882 for (l = already_linked_list->entry; l != NULL; l = l->next)
884 if (sec->comdat == NULL
885 || l->sec->comdat == NULL
886 || strcmp (sec->comdat->name, l->sec->comdat->name) == 0)
888 /* The section has already been linked. See if we should
890 switch (flags & SEC_LINK_DUPLICATES)
895 case SEC_LINK_DUPLICATES_DISCARD:
898 case SEC_LINK_DUPLICATES_ONE_ONLY:
899 if (sec->comdat == NULL)
900 einfo (_("%P: %B: warning: ignoring duplicate section `%s'\n"),
903 einfo (_("%P: %B: warning: ignoring duplicate `%s' section symbol `%s'\n"),
904 abfd, name, sec->comdat->name);
907 case SEC_LINK_DUPLICATES_SAME_CONTENTS:
908 /* FIXME: We should really dig out the contents of both
909 sections and memcmp them. The COFF/PE spec says that
910 the Microsoft linker does not implement this
911 correctly, so I'm not going to bother doing it
914 case SEC_LINK_DUPLICATES_SAME_SIZE:
915 if (bfd_section_size (abfd, sec)
916 != bfd_section_size (l->sec->owner, l->sec))
917 einfo (_("%P: %B: warning: duplicate section `%s' has different size\n"),
922 /* Set the output_section field so that lang_add_section
923 does not create a lang_input_section structure for this
924 section. Since there might be a symbol in the section
925 being discarded, we must retain a pointer to the section
926 which we are really going to use. */
927 sec->output_section = bfd_abs_section_ptr;
928 sec->kept_section = l->sec;
930 if (flags & SEC_GROUP)
931 bfd_discard_group (abfd, sec);
937 /* This is the first section with this name. Record it. Allocate
938 the memory from the same obstack as the hash table is kept in. */
940 l = bfd_hash_allocate (&already_linked_table, sizeof *l);
943 l->next = already_linked_list->entry;
944 already_linked_list->entry = l;
947 /* Support routines for the hash table used by section_already_linked,
948 initialize the table, fill in an entry and remove the table. */
950 static struct bfd_hash_entry *
951 already_linked_newfunc (struct bfd_hash_entry *entry ATTRIBUTE_UNUSED,
952 struct bfd_hash_table *table,
953 const char *string ATTRIBUTE_UNUSED)
955 struct already_linked_hash_entry *ret =
956 bfd_hash_allocate (table, sizeof (struct already_linked_hash_entry));
964 already_linked_table_init (void)
966 if (! bfd_hash_table_init_n (&already_linked_table,
967 already_linked_newfunc,
969 einfo (_("%P%F: Failed to create hash table\n"));
973 already_linked_table_free (void)
975 bfd_hash_table_free (&already_linked_table);
978 /* The wild routines.
980 These expand statements like *(.text) and foo.o to a list of
981 explicit actions, like foo.o(.text), bar.o(.text) and
982 foo.o(.text, .data). */
984 /* Return TRUE if the PATTERN argument is a wildcard pattern.
985 Although backslashes are treated specially if a pattern contains
986 wildcards, we do not consider the mere presence of a backslash to
987 be enough to cause the pattern to be treated as a wildcard.
988 That lets us handle DOS filenames more naturally. */
991 wildcardp (const char *pattern)
995 for (s = pattern; *s != '\0'; ++s)
1003 /* Add SECTION to the output section OUTPUT. Do this by creating a
1004 lang_input_section statement which is placed at PTR. FILE is the
1005 input file which holds SECTION. */
1008 lang_add_section (lang_statement_list_type *ptr,
1010 lang_output_section_statement_type *output,
1011 lang_input_statement_type *file)
1014 bfd_boolean discard;
1016 flags = bfd_get_section_flags (section->owner, section);
1020 /* Discard sections marked with SEC_EXCLUDE if we are doing a final
1021 link. Discard debugging sections marked with SEC_EXCLUDE on a
1022 relocatable link too. */
1023 if ((flags & SEC_EXCLUDE) != 0
1024 && ((flags & SEC_DEBUGGING) != 0 || !link_info.relocatable))
1027 /* Discard input sections which are assigned to a section named
1028 DISCARD_SECTION_NAME. */
1029 if (strcmp (output->name, DISCARD_SECTION_NAME) == 0)
1032 /* Discard debugging sections if we are stripping debugging
1034 if ((link_info.strip == strip_debugger || link_info.strip == strip_all)
1035 && (flags & SEC_DEBUGGING) != 0)
1040 if (section->output_section == NULL)
1042 /* This prevents future calls from assigning this section. */
1043 section->output_section = bfd_abs_section_ptr;
1048 if (section->output_section == NULL)
1051 lang_input_section_type *new;
1054 if (output->bfd_section == NULL)
1057 first = ! output->bfd_section->linker_has_input;
1058 output->bfd_section->linker_has_input = 1;
1060 /* Add a section reference to the list. */
1061 new = new_stat (lang_input_section, ptr);
1063 new->section = section;
1065 section->output_section = output->bfd_section;
1067 flags = section->flags;
1069 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1070 to an output section, because we want to be able to include a
1071 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1072 section (I don't know why we want to do this, but we do).
1073 build_link_order in ldwrite.c handles this case by turning
1074 the embedded SEC_NEVER_LOAD section into a fill. */
1076 flags &= ~ SEC_NEVER_LOAD;
1078 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1079 already been processed. One reason to do this is that on pe
1080 format targets, .text$foo sections go into .text and it's odd
1081 to see .text with SEC_LINK_ONCE set. */
1083 if (! link_info.relocatable)
1084 flags &= ~ (SEC_LINK_ONCE | SEC_LINK_DUPLICATES);
1086 /* If this is not the first input section, and the SEC_READONLY
1087 flag is not currently set, then don't set it just because the
1088 input section has it set. */
1090 if (! first && (section->output_section->flags & SEC_READONLY) == 0)
1091 flags &= ~ SEC_READONLY;
1093 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1095 && ((section->output_section->flags & (SEC_MERGE | SEC_STRINGS))
1096 != (flags & (SEC_MERGE | SEC_STRINGS))
1097 || ((flags & SEC_MERGE)
1098 && section->output_section->entsize != section->entsize)))
1100 section->output_section->flags &= ~ (SEC_MERGE | SEC_STRINGS);
1101 flags &= ~ (SEC_MERGE | SEC_STRINGS);
1104 /* For now make .tbss normal section. */
1105 if ((flags & SEC_THREAD_LOCAL) && ! link_info.relocatable)
1108 section->output_section->flags |= flags;
1110 if (flags & SEC_MERGE)
1111 section->output_section->entsize = section->entsize;
1113 /* If SEC_READONLY is not set in the input section, then clear
1114 it from the output section. */
1115 if ((section->flags & SEC_READONLY) == 0)
1116 section->output_section->flags &= ~SEC_READONLY;
1118 switch (output->sectype)
1120 case normal_section:
1125 case overlay_section:
1126 output->bfd_section->flags &= ~SEC_ALLOC;
1128 case noload_section:
1129 output->bfd_section->flags &= ~SEC_LOAD;
1130 output->bfd_section->flags |= SEC_NEVER_LOAD;
1134 /* Copy over SEC_SMALL_DATA. */
1135 if (section->flags & SEC_SMALL_DATA)
1136 section->output_section->flags |= SEC_SMALL_DATA;
1138 if (section->alignment_power > output->bfd_section->alignment_power)
1139 output->bfd_section->alignment_power = section->alignment_power;
1141 /* If supplied an alignment, then force it. */
1142 if (output->section_alignment != -1)
1143 output->bfd_section->alignment_power = output->section_alignment;
1145 if (section->flags & SEC_BLOCK)
1147 section->output_section->flags |= SEC_BLOCK;
1148 /* FIXME: This value should really be obtained from the bfd... */
1149 output->block_value = 128;
1154 /* Handle wildcard sorting. This returns the lang_input_section which
1155 should follow the one we are going to create for SECTION and FILE,
1156 based on the sorting requirements of WILD. It returns NULL if the
1157 new section should just go at the end of the current list. */
1159 static lang_statement_union_type *
1160 wild_sort (lang_wild_statement_type *wild,
1161 struct wildcard_list *sec,
1162 lang_input_statement_type *file,
1165 const char *section_name;
1166 lang_statement_union_type *l;
1168 if (!wild->filenames_sorted && (sec == NULL || !sec->spec.sorted))
1171 section_name = bfd_get_section_name (file->the_bfd, section);
1172 for (l = wild->children.head; l != NULL; l = l->header.next)
1174 lang_input_section_type *ls;
1176 if (l->header.type != lang_input_section_enum)
1178 ls = &l->input_section;
1180 /* Sorting by filename takes precedence over sorting by section
1183 if (wild->filenames_sorted)
1185 const char *fn, *ln;
1189 /* The PE support for the .idata section as generated by
1190 dlltool assumes that files will be sorted by the name of
1191 the archive and then the name of the file within the
1194 if (file->the_bfd != NULL
1195 && bfd_my_archive (file->the_bfd) != NULL)
1197 fn = bfd_get_filename (bfd_my_archive (file->the_bfd));
1202 fn = file->filename;
1206 if (ls->ifile->the_bfd != NULL
1207 && bfd_my_archive (ls->ifile->the_bfd) != NULL)
1209 ln = bfd_get_filename (bfd_my_archive (ls->ifile->the_bfd));
1214 ln = ls->ifile->filename;
1218 i = strcmp (fn, ln);
1227 fn = file->filename;
1229 ln = ls->ifile->filename;
1231 i = strcmp (fn, ln);
1239 /* Here either the files are not sorted by name, or we are
1240 looking at the sections for this file. */
1242 if (sec != NULL && sec->spec.sorted)
1244 if (strcmp (section_name,
1245 bfd_get_section_name (ls->ifile->the_bfd,
1255 /* Expand a wild statement for a particular FILE. SECTION may be
1256 NULL, in which case it is a wild card. */
1259 output_section_callback (lang_wild_statement_type *ptr,
1260 struct wildcard_list *sec,
1262 lang_input_statement_type *file,
1265 lang_statement_union_type *before;
1267 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1268 if (unique_section_p (bfd_get_section_name (file->the_bfd, section)))
1271 /* If the wild pattern was marked KEEP, the member sections
1272 should be as well. */
1273 if (ptr->keep_sections)
1274 section->flags |= SEC_KEEP;
1276 before = wild_sort (ptr, sec, file, section);
1278 /* Here BEFORE points to the lang_input_section which
1279 should follow the one we are about to add. If BEFORE
1280 is NULL, then the section should just go at the end
1281 of the current list. */
1284 lang_add_section (&ptr->children, section,
1285 (lang_output_section_statement_type *) output,
1289 lang_statement_list_type list;
1290 lang_statement_union_type **pp;
1292 lang_list_init (&list);
1293 lang_add_section (&list, section,
1294 (lang_output_section_statement_type *) output,
1297 /* If we are discarding the section, LIST.HEAD will
1299 if (list.head != NULL)
1301 ASSERT (list.head->header.next == NULL);
1303 for (pp = &ptr->children.head;
1305 pp = &(*pp)->header.next)
1306 ASSERT (*pp != NULL);
1308 list.head->header.next = *pp;
1314 /* This is passed a file name which must have been seen already and
1315 added to the statement tree. We will see if it has been opened
1316 already and had its symbols read. If not then we'll read it. */
1318 static lang_input_statement_type *
1319 lookup_name (const char *name)
1321 lang_input_statement_type *search;
1323 for (search = (lang_input_statement_type *) input_file_chain.head;
1325 search = (lang_input_statement_type *) search->next_real_file)
1327 /* Use the local_sym_name as the name of the file that has
1328 already been loaded as filename might have been transformed
1329 via the search directory lookup mechanism. */
1330 const char * filename = search->local_sym_name;
1332 if (filename == NULL && name == NULL)
1334 if (filename != NULL
1336 && strcmp (filename, name) == 0)
1341 search = new_afile (name, lang_input_file_is_search_file_enum, default_target,
1344 /* If we have already added this file, or this file is not real
1345 (FIXME: can that ever actually happen?) or the name is NULL
1346 (FIXME: can that ever actually happen?) don't add this file. */
1349 || search->filename == NULL)
1352 if (! load_symbols (search, NULL))
1358 /* Get the symbols for an input file. */
1361 load_symbols (lang_input_statement_type *entry,
1362 lang_statement_list_type *place)
1369 ldfile_open_file (entry);
1371 if (! bfd_check_format (entry->the_bfd, bfd_archive)
1372 && ! bfd_check_format_matches (entry->the_bfd, bfd_object, &matching))
1375 lang_statement_list_type *hold;
1376 bfd_boolean bad_load = TRUE;
1377 bfd_boolean save_ldlang_sysrooted_script;
1379 err = bfd_get_error ();
1381 /* See if the emulation has some special knowledge. */
1382 if (ldemul_unrecognized_file (entry))
1385 if (err == bfd_error_file_ambiguously_recognized)
1389 einfo (_("%B: file not recognized: %E\n"), entry->the_bfd);
1390 einfo (_("%B: matching formats:"), entry->the_bfd);
1391 for (p = matching; *p != NULL; p++)
1395 else if (err != bfd_error_file_not_recognized
1397 einfo (_("%F%B: file not recognized: %E\n"), entry->the_bfd);
1401 bfd_close (entry->the_bfd);
1402 entry->the_bfd = NULL;
1404 /* Try to interpret the file as a linker script. */
1405 ldfile_open_command_file (entry->filename);
1409 save_ldlang_sysrooted_script = ldlang_sysrooted_script;
1410 ldlang_sysrooted_script = entry->sysrooted;
1412 ldfile_assumed_script = TRUE;
1413 parser_input = input_script;
1415 ldfile_assumed_script = FALSE;
1417 ldlang_sysrooted_script = save_ldlang_sysrooted_script;
1423 if (ldemul_recognized_file (entry))
1426 /* We don't call ldlang_add_file for an archive. Instead, the
1427 add_symbols entry point will call ldlang_add_file, via the
1428 add_archive_element callback, for each element of the archive
1430 switch (bfd_get_format (entry->the_bfd))
1436 ldlang_add_file (entry);
1437 if (trace_files || trace_file_tries)
1438 info_msg ("%I\n", entry);
1442 if (entry->whole_archive)
1445 bfd_boolean loaded = TRUE;
1449 member = bfd_openr_next_archived_file (entry->the_bfd, member);
1454 if (! bfd_check_format (member, bfd_object))
1456 einfo (_("%F%B: member %B in archive is not an object\n"),
1457 entry->the_bfd, member);
1461 if (! ((*link_info.callbacks->add_archive_element)
1462 (&link_info, member, "--whole-archive")))
1465 if (! bfd_link_add_symbols (member, &link_info))
1467 einfo (_("%F%B: could not read symbols: %E\n"), member);
1472 entry->loaded = loaded;
1478 if (bfd_link_add_symbols (entry->the_bfd, &link_info))
1479 entry->loaded = TRUE;
1481 einfo (_("%F%B: could not read symbols: %E\n"), entry->the_bfd);
1483 return entry->loaded;
1486 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
1487 may be NULL, indicating that it is a wildcard. Separate
1488 lang_input_section statements are created for each part of the
1489 expansion; they are added after the wild statement S. OUTPUT is
1490 the output section. */
1493 wild (lang_wild_statement_type *s,
1494 const char *target ATTRIBUTE_UNUSED,
1495 lang_output_section_statement_type *output)
1497 struct wildcard_list *sec;
1499 walk_wild (s, output_section_callback, output);
1501 for (sec = s->section_list; sec != NULL; sec = sec->next)
1503 if (default_common_section != NULL)
1505 if (sec->spec.name != NULL && strcmp (sec->spec.name, "COMMON") == 0)
1507 /* Remember the section that common is going to in case we
1508 later get something which doesn't know where to put it. */
1509 default_common_section = output;
1514 /* Return TRUE iff target is the sought target. */
1517 get_target (const bfd_target *target, void *data)
1519 const char *sought = data;
1521 return strcmp (target->name, sought) == 0;
1524 /* Like strcpy() but convert to lower case as well. */
1527 stricpy (char *dest, char *src)
1531 while ((c = *src++) != 0)
1532 *dest++ = TOLOWER (c);
1537 /* Remove the first occurrence of needle (if any) in haystack
1541 strcut (char *haystack, char *needle)
1543 haystack = strstr (haystack, needle);
1549 for (src = haystack + strlen (needle); *src;)
1550 *haystack++ = *src++;
1556 /* Compare two target format name strings.
1557 Return a value indicating how "similar" they are. */
1560 name_compare (char *first, char *second)
1566 copy1 = xmalloc (strlen (first) + 1);
1567 copy2 = xmalloc (strlen (second) + 1);
1569 /* Convert the names to lower case. */
1570 stricpy (copy1, first);
1571 stricpy (copy2, second);
1573 /* Remove size and endian strings from the name. */
1574 strcut (copy1, "big");
1575 strcut (copy1, "little");
1576 strcut (copy2, "big");
1577 strcut (copy2, "little");
1579 /* Return a value based on how many characters match,
1580 starting from the beginning. If both strings are
1581 the same then return 10 * their length. */
1582 for (result = 0; copy1[result] == copy2[result]; result++)
1583 if (copy1[result] == 0)
1595 /* Set by closest_target_match() below. */
1596 static const bfd_target *winner;
1598 /* Scan all the valid bfd targets looking for one that has the endianness
1599 requirement that was specified on the command line, and is the nearest
1600 match to the original output target. */
1603 closest_target_match (const bfd_target *target, void *data)
1605 const bfd_target *original = data;
1607 if (command_line.endian == ENDIAN_BIG
1608 && target->byteorder != BFD_ENDIAN_BIG)
1611 if (command_line.endian == ENDIAN_LITTLE
1612 && target->byteorder != BFD_ENDIAN_LITTLE)
1615 /* Must be the same flavour. */
1616 if (target->flavour != original->flavour)
1619 /* If we have not found a potential winner yet, then record this one. */
1626 /* Oh dear, we now have two potential candidates for a successful match.
1627 Compare their names and choose the better one. */
1628 if (name_compare (target->name, original->name)
1629 > name_compare (winner->name, original->name))
1632 /* Keep on searching until wqe have checked them all. */
1636 /* Return the BFD target format of the first input file. */
1639 get_first_input_target (void)
1641 char *target = NULL;
1643 LANG_FOR_EACH_INPUT_STATEMENT (s)
1645 if (s->header.type == lang_input_statement_enum
1648 ldfile_open_file (s);
1650 if (s->the_bfd != NULL
1651 && bfd_check_format (s->the_bfd, bfd_object))
1653 target = bfd_get_target (s->the_bfd);
1665 lang_get_output_target (void)
1669 /* Has the user told us which output format to use? */
1670 if (output_target != NULL)
1671 return output_target;
1673 /* No - has the current target been set to something other than
1675 if (current_target != default_target)
1676 return current_target;
1678 /* No - can we determine the format of the first input file? */
1679 target = get_first_input_target ();
1683 /* Failed - use the default output target. */
1684 return default_target;
1687 /* Open the output file. */
1690 open_output (const char *name)
1694 output_target = lang_get_output_target ();
1696 /* Has the user requested a particular endianness on the command
1698 if (command_line.endian != ENDIAN_UNSET)
1700 const bfd_target *target;
1701 enum bfd_endian desired_endian;
1703 /* Get the chosen target. */
1704 target = bfd_search_for_target (get_target, (void *) output_target);
1706 /* If the target is not supported, we cannot do anything. */
1709 if (command_line.endian == ENDIAN_BIG)
1710 desired_endian = BFD_ENDIAN_BIG;
1712 desired_endian = BFD_ENDIAN_LITTLE;
1714 /* See if the target has the wrong endianness. This should
1715 not happen if the linker script has provided big and
1716 little endian alternatives, but some scrips don't do
1718 if (target->byteorder != desired_endian)
1720 /* If it does, then see if the target provides
1721 an alternative with the correct endianness. */
1722 if (target->alternative_target != NULL
1723 && (target->alternative_target->byteorder == desired_endian))
1724 output_target = target->alternative_target->name;
1727 /* Try to find a target as similar as possible to
1728 the default target, but which has the desired
1729 endian characteristic. */
1730 bfd_search_for_target (closest_target_match,
1733 /* Oh dear - we could not find any targets that
1734 satisfy our requirements. */
1736 einfo (_("%P: warning: could not find any targets that match endianness requirement\n"));
1738 output_target = winner->name;
1744 output = bfd_openw (name, output_target);
1748 if (bfd_get_error () == bfd_error_invalid_target)
1749 einfo (_("%P%F: target %s not found\n"), output_target);
1751 einfo (_("%P%F: cannot open output file %s: %E\n"), name);
1754 delete_output_file_on_failure = TRUE;
1757 output->flags |= D_PAGED;
1760 if (! bfd_set_format (output, bfd_object))
1761 einfo (_("%P%F:%s: can not make object file: %E\n"), name);
1762 if (! bfd_set_arch_mach (output,
1763 ldfile_output_architecture,
1764 ldfile_output_machine))
1765 einfo (_("%P%F:%s: can not set architecture: %E\n"), name);
1767 link_info.hash = bfd_link_hash_table_create (output);
1768 if (link_info.hash == NULL)
1769 einfo (_("%P%F: can not create link hash table: %E\n"));
1771 bfd_set_gp_size (output, g_switch_value);
1776 ldlang_open_output (lang_statement_union_type *statement)
1778 switch (statement->header.type)
1780 case lang_output_statement_enum:
1781 ASSERT (output_bfd == NULL);
1782 output_bfd = open_output (statement->output_statement.name);
1783 ldemul_set_output_arch ();
1784 if (config.magic_demand_paged && !link_info.relocatable)
1785 output_bfd->flags |= D_PAGED;
1787 output_bfd->flags &= ~D_PAGED;
1788 if (config.text_read_only)
1789 output_bfd->flags |= WP_TEXT;
1791 output_bfd->flags &= ~WP_TEXT;
1792 if (link_info.traditional_format)
1793 output_bfd->flags |= BFD_TRADITIONAL_FORMAT;
1795 output_bfd->flags &= ~BFD_TRADITIONAL_FORMAT;
1798 case lang_target_statement_enum:
1799 current_target = statement->target_statement.target;
1806 /* Convert between addresses in bytes and sizes in octets.
1807 For currently supported targets, octets_per_byte is always a power
1808 of two, so we can use shifts. */
1809 #define TO_ADDR(X) ((X) >> opb_shift)
1810 #define TO_SIZE(X) ((X) << opb_shift)
1812 /* Support the above. */
1813 static unsigned int opb_shift = 0;
1818 unsigned x = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
1819 ldfile_output_machine);
1822 while ((x & 1) == 0)
1830 /* Open all the input files. */
1833 open_input_bfds (lang_statement_union_type *s, bfd_boolean force)
1835 for (; s != NULL; s = s->header.next)
1837 switch (s->header.type)
1839 case lang_constructors_statement_enum:
1840 open_input_bfds (constructor_list.head, force);
1842 case lang_output_section_statement_enum:
1843 open_input_bfds (s->output_section_statement.children.head, force);
1845 case lang_wild_statement_enum:
1846 /* Maybe we should load the file's symbols. */
1847 if (s->wild_statement.filename
1848 && ! wildcardp (s->wild_statement.filename))
1849 (void) lookup_name (s->wild_statement.filename);
1850 open_input_bfds (s->wild_statement.children.head, force);
1852 case lang_group_statement_enum:
1854 struct bfd_link_hash_entry *undefs;
1856 /* We must continually search the entries in the group
1857 until no new symbols are added to the list of undefined
1862 undefs = link_info.hash->undefs_tail;
1863 open_input_bfds (s->group_statement.children.head, TRUE);
1865 while (undefs != link_info.hash->undefs_tail);
1868 case lang_target_statement_enum:
1869 current_target = s->target_statement.target;
1871 case lang_input_statement_enum:
1872 if (s->input_statement.real)
1874 lang_statement_list_type add;
1876 s->input_statement.target = current_target;
1878 /* If we are being called from within a group, and this
1879 is an archive which has already been searched, then
1880 force it to be researched unless the whole archive
1881 has been loaded already. */
1883 && !s->input_statement.whole_archive
1884 && s->input_statement.loaded
1885 && bfd_check_format (s->input_statement.the_bfd,
1887 s->input_statement.loaded = FALSE;
1889 lang_list_init (&add);
1891 if (! load_symbols (&s->input_statement, &add))
1892 config.make_executable = FALSE;
1894 if (add.head != NULL)
1896 *add.tail = s->header.next;
1897 s->header.next = add.head;
1907 /* If there are [COMMONS] statements, put a wild one into the bss
1911 lang_reasonable_defaults (void)
1914 lang_output_section_statement_lookup (".text");
1915 lang_output_section_statement_lookup (".data");
1917 default_common_section = lang_output_section_statement_lookup (".bss");
1919 if (!placed_commons)
1921 lang_wild_statement_type *new =
1922 new_stat (lang_wild_statement,
1923 &default_common_section->children);
1925 new->section_name = "COMMON";
1926 new->filename = NULL;
1927 lang_list_init (&new->children);
1932 /* Add a symbol to a hash of symbols used in DEFINED (NAME) expressions. */
1935 lang_track_definedness (const char *name)
1937 if (bfd_hash_lookup (&lang_definedness_table, name, TRUE, FALSE) == NULL)
1938 einfo (_("%P%F: bfd_hash_lookup failed creating symbol %s\n"), name);
1941 /* New-function for the definedness hash table. */
1943 static struct bfd_hash_entry *
1944 lang_definedness_newfunc (struct bfd_hash_entry *entry,
1945 struct bfd_hash_table *table ATTRIBUTE_UNUSED,
1946 const char *name ATTRIBUTE_UNUSED)
1948 struct lang_definedness_hash_entry *ret
1949 = (struct lang_definedness_hash_entry *) entry;
1952 ret = (struct lang_definedness_hash_entry *)
1953 bfd_hash_allocate (table, sizeof (struct lang_definedness_hash_entry));
1956 einfo (_("%P%F: bfd_hash_allocate failed creating symbol %s\n"), name);
1958 ret->iteration = -1;
1962 /* Return the iteration when the definition of NAME was last updated. A
1963 value of -1 means that the symbol is not defined in the linker script
1964 or the command line, but may be defined in the linker symbol table. */
1967 lang_symbol_definition_iteration (const char *name)
1969 struct lang_definedness_hash_entry *defentry
1970 = (struct lang_definedness_hash_entry *)
1971 bfd_hash_lookup (&lang_definedness_table, name, FALSE, FALSE);
1973 /* We've already created this one on the presence of DEFINED in the
1974 script, so it can't be NULL unless something is borked elsewhere in
1976 if (defentry == NULL)
1979 return defentry->iteration;
1982 /* Update the definedness state of NAME. */
1985 lang_update_definedness (const char *name, struct bfd_link_hash_entry *h)
1987 struct lang_definedness_hash_entry *defentry
1988 = (struct lang_definedness_hash_entry *)
1989 bfd_hash_lookup (&lang_definedness_table, name, FALSE, FALSE);
1991 /* We don't keep track of symbols not tested with DEFINED. */
1992 if (defentry == NULL)
1995 /* If the symbol was already defined, and not from an earlier statement
1996 iteration, don't update the definedness iteration, because that'd
1997 make the symbol seem defined in the linker script at this point, and
1998 it wasn't; it was defined in some object. If we do anyway, DEFINED
1999 would start to yield false before this point and the construct "sym =
2000 DEFINED (sym) ? sym : X;" would change sym to X despite being defined
2002 if (h->type != bfd_link_hash_undefined
2003 && h->type != bfd_link_hash_common
2004 && h->type != bfd_link_hash_new
2005 && defentry->iteration == -1)
2008 defentry->iteration = lang_statement_iteration;
2011 /* Add the supplied name to the symbol table as an undefined reference.
2012 This is a two step process as the symbol table doesn't even exist at
2013 the time the ld command line is processed. First we put the name
2014 on a list, then, once the output file has been opened, transfer the
2015 name to the symbol table. */
2017 typedef struct bfd_sym_chain ldlang_undef_chain_list_type;
2019 #define ldlang_undef_chain_list_head entry_symbol.next
2022 ldlang_add_undef (const char *const name)
2024 ldlang_undef_chain_list_type *new =
2025 stat_alloc (sizeof (ldlang_undef_chain_list_type));
2027 new->next = ldlang_undef_chain_list_head;
2028 ldlang_undef_chain_list_head = new;
2030 new->name = xstrdup (name);
2032 if (output_bfd != NULL)
2033 insert_undefined (new->name);
2036 /* Insert NAME as undefined in the symbol table. */
2039 insert_undefined (const char *name)
2041 struct bfd_link_hash_entry *h;
2043 h = bfd_link_hash_lookup (link_info.hash, name, TRUE, FALSE, TRUE);
2045 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2046 if (h->type == bfd_link_hash_new)
2048 h->type = bfd_link_hash_undefined;
2049 h->u.undef.abfd = NULL;
2050 bfd_link_add_undef (link_info.hash, h);
2054 /* Run through the list of undefineds created above and place them
2055 into the linker hash table as undefined symbols belonging to the
2059 lang_place_undefineds (void)
2061 ldlang_undef_chain_list_type *ptr;
2063 for (ptr = ldlang_undef_chain_list_head; ptr != NULL; ptr = ptr->next)
2064 insert_undefined (ptr->name);
2067 /* Open input files and attach to output sections. */
2070 map_input_to_output_sections
2071 (lang_statement_union_type *s, const char *target,
2072 lang_output_section_statement_type *output_section_statement)
2074 for (; s != NULL; s = s->header.next)
2076 switch (s->header.type)
2078 case lang_wild_statement_enum:
2079 wild (&s->wild_statement, target, output_section_statement);
2081 case lang_constructors_statement_enum:
2082 map_input_to_output_sections (constructor_list.head,
2084 output_section_statement);
2086 case lang_output_section_statement_enum:
2087 map_input_to_output_sections (s->output_section_statement.children.head,
2089 &s->output_section_statement);
2091 case lang_output_statement_enum:
2093 case lang_target_statement_enum:
2094 target = s->target_statement.target;
2096 case lang_group_statement_enum:
2097 map_input_to_output_sections (s->group_statement.children.head,
2099 output_section_statement);
2101 case lang_fill_statement_enum:
2102 case lang_input_section_enum:
2103 case lang_object_symbols_statement_enum:
2104 case lang_data_statement_enum:
2105 case lang_reloc_statement_enum:
2106 case lang_padding_statement_enum:
2107 case lang_input_statement_enum:
2108 if (output_section_statement != NULL
2109 && output_section_statement->bfd_section == NULL)
2110 init_os (output_section_statement);
2112 case lang_assignment_statement_enum:
2113 if (output_section_statement != NULL
2114 && output_section_statement->bfd_section == NULL)
2115 init_os (output_section_statement);
2117 /* Make sure that any sections mentioned in the assignment
2119 exp_init_os (s->assignment_statement.exp);
2121 case lang_afile_asection_pair_statement_enum:
2124 case lang_address_statement_enum:
2125 /* Mark the specified section with the supplied address. */
2127 lang_output_section_statement_type *os =
2128 lang_output_section_statement_lookup
2129 (s->address_statement.section_name);
2131 if (os->bfd_section == NULL)
2133 os->addr_tree = s->address_statement.address;
2140 /* An output section might have been removed after its statement was
2141 added. For example, ldemul_before_allocation can remove dynamic
2142 sections if they turn out to be not needed. Clean them up here. */
2145 strip_excluded_output_sections (void)
2147 lang_statement_union_type *u;
2149 for (u = lang_output_section_statement.head;
2151 u = u->output_section_statement.next)
2153 lang_output_section_statement_type *os;
2156 os = &u->output_section_statement;
2157 s = os->bfd_section;
2158 if (s != NULL && (s->flags & SEC_EXCLUDE) != 0)
2162 os->bfd_section = NULL;
2164 for (p = &output_bfd->sections; *p; p = &(*p)->next)
2167 bfd_section_list_remove (output_bfd, p);
2168 output_bfd->section_count--;
2176 print_output_section_statement
2177 (lang_output_section_statement_type *output_section_statement)
2179 asection *section = output_section_statement->bfd_section;
2182 if (output_section_statement != abs_output_section)
2184 minfo ("\n%s", output_section_statement->name);
2186 if (section != NULL)
2188 print_dot = section->vma;
2190 len = strlen (output_section_statement->name);
2191 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2196 while (len < SECTION_NAME_MAP_LENGTH)
2202 minfo ("0x%V %W", section->vma, section->_raw_size);
2204 if (output_section_statement->load_base != NULL)
2208 addr = exp_get_abs_int (output_section_statement->load_base, 0,
2209 "load base", lang_final_phase_enum);
2210 minfo (_(" load address 0x%V"), addr);
2217 print_statement_list (output_section_statement->children.head,
2218 output_section_statement);
2222 print_assignment (lang_assignment_statement_type *assignment,
2223 lang_output_section_statement_type *output_section)
2226 etree_value_type result;
2228 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2231 result = exp_fold_tree (assignment->exp->assign.src, output_section,
2232 lang_final_phase_enum, print_dot, &print_dot);
2238 value = result.value + result.section->bfd_section->vma;
2239 dst = assignment->exp->assign.dst;
2241 minfo ("0x%V", value);
2242 if (dst[0] == '.' && dst[1] == 0)
2255 exp_print_tree (assignment->exp);
2261 print_input_statement (lang_input_statement_type *statm)
2263 if (statm->filename != NULL)
2265 fprintf (config.map_file, "LOAD %s\n", statm->filename);
2269 /* Print all symbols defined in a particular section. This is called
2270 via bfd_link_hash_traverse. */
2273 print_one_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr)
2275 asection *sec = ptr;
2277 if ((hash_entry->type == bfd_link_hash_defined
2278 || hash_entry->type == bfd_link_hash_defweak)
2279 && sec == hash_entry->u.def.section)
2283 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2286 (hash_entry->u.def.value
2287 + hash_entry->u.def.section->output_offset
2288 + hash_entry->u.def.section->output_section->vma));
2290 minfo (" %T\n", hash_entry->root.string);
2296 /* Print information about an input section to the map file. */
2299 print_input_section (lang_input_section_type *in)
2301 asection *i = in->section;
2302 bfd_size_type size = i->_cooked_size != 0 ? i->_cooked_size : i->_raw_size;
2309 minfo ("%s", i->name);
2311 if (i->output_section != NULL)
2315 len = 1 + strlen (i->name);
2316 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2321 while (len < SECTION_NAME_MAP_LENGTH)
2327 minfo ("0x%V %W %B\n",
2328 i->output_section->vma + i->output_offset, TO_ADDR (size),
2331 if (i->_cooked_size != 0 && i->_cooked_size != i->_raw_size)
2333 len = SECTION_NAME_MAP_LENGTH + 3;
2345 minfo (_("%W (size before relaxing)\n"), i->_raw_size);
2348 bfd_link_hash_traverse (link_info.hash, print_one_symbol, i);
2350 print_dot = (i->output_section->vma + i->output_offset
2357 print_fill_statement (lang_fill_statement_type *fill)
2361 fputs (" FILL mask 0x", config.map_file);
2362 for (p = fill->fill->data, size = fill->fill->size; size != 0; p++, size--)
2363 fprintf (config.map_file, "%02x", *p);
2364 fputs ("\n", config.map_file);
2368 print_data_statement (lang_data_statement_type *data)
2376 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2379 addr = data->output_vma;
2380 if (data->output_section != NULL)
2381 addr += data->output_section->vma;
2409 minfo ("0x%V %W %s 0x%v", addr, size, name, data->value);
2411 if (data->exp->type.node_class != etree_value)
2414 exp_print_tree (data->exp);
2419 print_dot = addr + TO_ADDR (size);
2422 /* Print an address statement. These are generated by options like
2426 print_address_statement (lang_address_statement_type *address)
2428 minfo (_("Address of section %s set to "), address->section_name);
2429 exp_print_tree (address->address);
2433 /* Print a reloc statement. */
2436 print_reloc_statement (lang_reloc_statement_type *reloc)
2443 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2446 addr = reloc->output_vma;
2447 if (reloc->output_section != NULL)
2448 addr += reloc->output_section->vma;
2450 size = bfd_get_reloc_size (reloc->howto);
2452 minfo ("0x%V %W RELOC %s ", addr, size, reloc->howto->name);
2454 if (reloc->name != NULL)
2455 minfo ("%s+", reloc->name);
2457 minfo ("%s+", reloc->section->name);
2459 exp_print_tree (reloc->addend_exp);
2463 print_dot = addr + TO_ADDR (size);
2467 print_padding_statement (lang_padding_statement_type *s)
2475 len = sizeof " *fill*" - 1;
2476 while (len < SECTION_NAME_MAP_LENGTH)
2482 addr = s->output_offset;
2483 if (s->output_section != NULL)
2484 addr += s->output_section->vma;
2485 minfo ("0x%V %W ", addr, s->size);
2487 if (s->fill->size != 0)
2491 for (p = s->fill->data, size = s->fill->size; size != 0; p++, size--)
2492 fprintf (config.map_file, "%02x", *p);
2497 print_dot = addr + TO_ADDR (s->size);
2501 print_wild_statement (lang_wild_statement_type *w,
2502 lang_output_section_statement_type *os)
2504 struct wildcard_list *sec;
2508 if (w->filenames_sorted)
2510 if (w->filename != NULL)
2511 minfo ("%s", w->filename);
2514 if (w->filenames_sorted)
2518 for (sec = w->section_list; sec; sec = sec->next)
2520 if (sec->spec.sorted)
2522 if (sec->spec.exclude_name_list != NULL)
2525 minfo ("EXCLUDE_FILE(%s", sec->spec.exclude_name_list->name);
2526 for (tmp = sec->spec.exclude_name_list->next; tmp; tmp = tmp->next)
2527 minfo (" %s", tmp->name);
2530 if (sec->spec.name != NULL)
2531 minfo ("%s", sec->spec.name);
2534 if (sec->spec.sorted)
2543 print_statement_list (w->children.head, os);
2546 /* Print a group statement. */
2549 print_group (lang_group_statement_type *s,
2550 lang_output_section_statement_type *os)
2552 fprintf (config.map_file, "START GROUP\n");
2553 print_statement_list (s->children.head, os);
2554 fprintf (config.map_file, "END GROUP\n");
2557 /* Print the list of statements in S.
2558 This can be called for any statement type. */
2561 print_statement_list (lang_statement_union_type *s,
2562 lang_output_section_statement_type *os)
2566 print_statement (s, os);
2571 /* Print the first statement in statement list S.
2572 This can be called for any statement type. */
2575 print_statement (lang_statement_union_type *s,
2576 lang_output_section_statement_type *os)
2578 switch (s->header.type)
2581 fprintf (config.map_file, _("Fail with %d\n"), s->header.type);
2584 case lang_constructors_statement_enum:
2585 if (constructor_list.head != NULL)
2587 if (constructors_sorted)
2588 minfo (" SORT (CONSTRUCTORS)\n");
2590 minfo (" CONSTRUCTORS\n");
2591 print_statement_list (constructor_list.head, os);
2594 case lang_wild_statement_enum:
2595 print_wild_statement (&s->wild_statement, os);
2597 case lang_address_statement_enum:
2598 print_address_statement (&s->address_statement);
2600 case lang_object_symbols_statement_enum:
2601 minfo (" CREATE_OBJECT_SYMBOLS\n");
2603 case lang_fill_statement_enum:
2604 print_fill_statement (&s->fill_statement);
2606 case lang_data_statement_enum:
2607 print_data_statement (&s->data_statement);
2609 case lang_reloc_statement_enum:
2610 print_reloc_statement (&s->reloc_statement);
2612 case lang_input_section_enum:
2613 print_input_section (&s->input_section);
2615 case lang_padding_statement_enum:
2616 print_padding_statement (&s->padding_statement);
2618 case lang_output_section_statement_enum:
2619 print_output_section_statement (&s->output_section_statement);
2621 case lang_assignment_statement_enum:
2622 print_assignment (&s->assignment_statement, os);
2624 case lang_target_statement_enum:
2625 fprintf (config.map_file, "TARGET(%s)\n", s->target_statement.target);
2627 case lang_output_statement_enum:
2628 minfo ("OUTPUT(%s", s->output_statement.name);
2629 if (output_target != NULL)
2630 minfo (" %s", output_target);
2633 case lang_input_statement_enum:
2634 print_input_statement (&s->input_statement);
2636 case lang_group_statement_enum:
2637 print_group (&s->group_statement, os);
2639 case lang_afile_asection_pair_statement_enum:
2646 print_statements (void)
2648 print_statement_list (statement_list.head, abs_output_section);
2651 /* Print the first N statements in statement list S to STDERR.
2652 If N == 0, nothing is printed.
2653 If N < 0, the entire list is printed.
2654 Intended to be called from GDB. */
2657 dprint_statement (lang_statement_union_type *s, int n)
2659 FILE *map_save = config.map_file;
2661 config.map_file = stderr;
2664 print_statement_list (s, abs_output_section);
2667 while (s && --n >= 0)
2669 print_statement (s, abs_output_section);
2674 config.map_file = map_save;
2678 insert_pad (lang_statement_union_type **ptr,
2680 unsigned int alignment_needed,
2681 asection *output_section,
2684 static fill_type zero_fill = { 1, { 0 } };
2685 lang_statement_union_type *pad;
2687 pad = ((lang_statement_union_type *)
2688 ((char *) ptr - offsetof (lang_statement_union_type, header.next)));
2689 if (ptr != &statement_list.head
2690 && pad->header.type == lang_padding_statement_enum
2691 && pad->padding_statement.output_section == output_section)
2693 /* Use the existing pad statement. The above test on output
2694 section is probably redundant, but it doesn't hurt to check. */
2698 /* Make a new padding statement, linked into existing chain. */
2699 pad = stat_alloc (sizeof (lang_padding_statement_type));
2700 pad->header.next = *ptr;
2702 pad->header.type = lang_padding_statement_enum;
2703 pad->padding_statement.output_section = output_section;
2706 pad->padding_statement.fill = fill;
2708 pad->padding_statement.output_offset = dot - output_section->vma;
2709 pad->padding_statement.size = alignment_needed;
2710 output_section->_raw_size += alignment_needed;
2713 /* Work out how much this section will move the dot point. */
2716 size_input_section (lang_statement_union_type **this_ptr,
2717 lang_output_section_statement_type *output_section_statement,
2721 lang_input_section_type *is = &((*this_ptr)->input_section);
2722 asection *i = is->section;
2724 if (!is->ifile->just_syms_flag)
2726 unsigned int alignment_needed;
2729 /* Align this section first to the input sections requirement,
2730 then to the output section's requirement. If this alignment
2731 is greater than any seen before, then record it too. Perform
2732 the alignment by inserting a magic 'padding' statement. */
2734 if (output_section_statement->subsection_alignment != -1)
2735 i->alignment_power = output_section_statement->subsection_alignment;
2737 o = output_section_statement->bfd_section;
2738 if (o->alignment_power < i->alignment_power)
2739 o->alignment_power = i->alignment_power;
2741 alignment_needed = align_power (dot, i->alignment_power) - dot;
2743 if (alignment_needed != 0)
2745 insert_pad (this_ptr, fill, TO_SIZE (alignment_needed), o, dot);
2746 dot += alignment_needed;
2749 /* Remember where in the output section this input section goes. */
2751 i->output_offset = dot - o->vma;
2753 /* Mark how big the output section must be to contain this now. */
2754 if (i->_cooked_size != 0)
2755 dot += TO_ADDR (i->_cooked_size);
2757 dot += TO_ADDR (i->_raw_size);
2758 o->_raw_size = TO_SIZE (dot - o->vma);
2762 i->output_offset = i->vma - output_section_statement->bfd_section->vma;
2768 #define IGNORE_SECTION(bfd, s) \
2769 (((bfd_get_section_flags (bfd, s) & (SEC_ALLOC | SEC_NEVER_LOAD)) \
2771 || bfd_section_size (bfd, s) == 0)
2773 /* Check to see if any allocated sections overlap with other allocated
2774 sections. This can happen when the linker script specifically specifies
2775 the output section addresses of the two sections. */
2778 lang_check_section_addresses (void)
2782 /* Scan all sections in the output list. */
2783 for (s = output_bfd->sections; s != NULL; s = s->next)
2787 /* Ignore sections which are not loaded or which have no contents. */
2788 if (IGNORE_SECTION (output_bfd, s))
2791 /* Once we reach section 's' stop our seach. This prevents two
2792 warning messages from being produced, one for 'section A overlaps
2793 section B' and one for 'section B overlaps section A'. */
2794 for (os = output_bfd->sections; os != s; os = os->next)
2801 /* Only consider loadable sections with real contents. */
2802 if (IGNORE_SECTION (output_bfd, os))
2805 /* We must check the sections' LMA addresses not their
2806 VMA addresses because overlay sections can have
2807 overlapping VMAs but they must have distinct LMAs. */
2808 s_start = bfd_section_lma (output_bfd, s);
2809 os_start = bfd_section_lma (output_bfd, os);
2810 s_end = s_start + TO_ADDR (bfd_section_size (output_bfd, s)) - 1;
2811 os_end = os_start + TO_ADDR (bfd_section_size (output_bfd, os)) - 1;
2813 /* Look for an overlap. */
2814 if ((s_end < os_start) || (s_start > os_end))
2818 _("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
2819 s->name, s_start, s_end, os->name, os_start, os_end);
2821 /* Once we have found one overlap for this section,
2822 stop looking for others. */
2828 /* Make sure the new address is within the region. We explicitly permit the
2829 current address to be at the exact end of the region when the address is
2830 non-zero, in case the region is at the end of addressable memory and the
2831 calculation wraps around. */
2834 os_region_check (lang_output_section_statement_type *os,
2835 lang_memory_region_type *region,
2839 if ((region->current < region->origin
2840 || (region->current - region->origin > region->length))
2841 && ((region->current != region->origin + region->length)
2846 einfo (_("%X%P: address 0x%v of %B section %s is not within region %s\n"),
2848 os->bfd_section->owner,
2849 os->bfd_section->name,
2854 einfo (_("%X%P: region %s is full (%B section %s)\n"),
2856 os->bfd_section->owner,
2857 os->bfd_section->name);
2859 /* Reset the region pointer. */
2860 region->current = region->origin;
2864 /* Set the sizes for all the output sections. */
2867 lang_size_sections_1
2868 (lang_statement_union_type *s,
2869 lang_output_section_statement_type *output_section_statement,
2870 lang_statement_union_type **prev,
2874 bfd_boolean check_regions)
2876 /* Size up the sections from their constituent parts. */
2877 for (; s != NULL; s = s->header.next)
2879 switch (s->header.type)
2881 case lang_output_section_statement_enum:
2884 lang_output_section_statement_type *os;
2886 os = &s->output_section_statement;
2887 if (os->bfd_section == NULL)
2888 /* This section was never actually created. */
2891 /* If this is a COFF shared library section, use the size and
2892 address from the input section. FIXME: This is COFF
2893 specific; it would be cleaner if there were some other way
2894 to do this, but nothing simple comes to mind. */
2895 if ((os->bfd_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
2899 if (os->children.head == NULL
2900 || os->children.head->header.next != NULL
2901 || os->children.head->header.type != lang_input_section_enum)
2902 einfo (_("%P%X: Internal error on COFF shared library section %s\n"),
2905 input = os->children.head->input_section.section;
2906 bfd_set_section_vma (os->bfd_section->owner,
2908 bfd_section_vma (input->owner, input));
2909 os->bfd_section->_raw_size = input->_raw_size;
2913 if (bfd_is_abs_section (os->bfd_section))
2915 /* No matter what happens, an abs section starts at zero. */
2916 ASSERT (os->bfd_section->vma == 0);
2920 if (os->addr_tree == NULL)
2922 /* No address specified for this section, get one
2923 from the region specification. */
2924 if (os->region == NULL
2925 || (((bfd_get_section_flags (output_bfd, os->bfd_section)
2926 & (SEC_ALLOC | SEC_LOAD)) != 0)
2927 && os->region->name[0] == '*'
2928 && strcmp (os->region->name, DEFAULT_MEMORY_REGION) == 0))
2930 os->region = lang_memory_default (os->bfd_section);
2933 /* If a loadable section is using the default memory
2934 region, and some non default memory regions were
2935 defined, issue an error message. */
2936 if (!IGNORE_SECTION (output_bfd, os->bfd_section)
2937 && ! link_info.relocatable
2939 && strcmp (os->region->name, DEFAULT_MEMORY_REGION) == 0
2940 && lang_memory_region_list != NULL
2941 && (strcmp (lang_memory_region_list->name,
2942 DEFAULT_MEMORY_REGION) != 0
2943 || lang_memory_region_list->next != NULL))
2945 /* By default this is an error rather than just a
2946 warning because if we allocate the section to the
2947 default memory region we can end up creating an
2948 excessively large binary, or even seg faulting when
2949 attempting to perform a negative seek. See
2950 http://sources.redhat.com/ml/binutils/2003-04/msg00423.html
2951 for an example of this. This behaviour can be
2952 overridden by the using the --no-check-sections
2954 if (command_line.check_section_addresses)
2955 einfo (_("%P%F: error: no memory region specified for loadable section `%s'\n"),
2956 bfd_get_section_name (output_bfd,
2959 einfo (_("%P: warning: no memory region specified for loadable section `%s'\n"),
2960 bfd_get_section_name (output_bfd,
2964 dot = os->region->current;
2966 if (os->section_alignment == -1)
2971 dot = align_power (dot,
2972 os->bfd_section->alignment_power);
2974 if (dot != olddot && config.warn_section_align)
2975 einfo (_("%P: warning: changing start of section %s by %u bytes\n"),
2976 os->name, (unsigned int) (dot - olddot));
2983 r = exp_fold_tree (os->addr_tree,
2985 lang_allocating_phase_enum,
2988 einfo (_("%F%S: non constant address expression for section %s\n"),
2991 dot = r.value + r.section->bfd_section->vma;
2994 /* The section starts here.
2995 First, align to what the section needs. */
2997 if (os->section_alignment != -1)
2998 dot = align_power (dot, os->section_alignment);
3000 bfd_set_section_vma (0, os->bfd_section, dot);
3002 os->bfd_section->output_offset = 0;
3005 lang_size_sections_1 (os->children.head, os, &os->children.head,
3006 os->fill, dot, relax, check_regions);
3008 /* Put the section within the requested block size, or
3009 align at the block boundary. */
3010 after = ((os->bfd_section->vma
3011 + TO_ADDR (os->bfd_section->_raw_size)
3012 + os->block_value - 1)
3013 & - (bfd_vma) os->block_value);
3015 if (bfd_is_abs_section (os->bfd_section))
3016 ASSERT (after == os->bfd_section->vma);
3017 else if ((os->bfd_section->flags & SEC_HAS_CONTENTS) == 0
3018 && (os->bfd_section->flags & SEC_THREAD_LOCAL)
3019 && ! link_info.relocatable)
3020 os->bfd_section->_raw_size = 0;
3022 os->bfd_section->_raw_size
3023 = TO_SIZE (after - os->bfd_section->vma);
3025 dot = os->bfd_section->vma + TO_ADDR (os->bfd_section->_raw_size);
3026 os->processed = TRUE;
3028 if (os->update_dot_tree != 0)
3029 exp_fold_tree (os->update_dot_tree, abs_output_section,
3030 lang_allocating_phase_enum, dot, &dot);
3032 /* Update dot in the region ?
3033 We only do this if the section is going to be allocated,
3034 since unallocated sections do not contribute to the region's
3035 overall size in memory.
3037 If the SEC_NEVER_LOAD bit is not set, it will affect the
3038 addresses of sections after it. We have to update
3040 if (os->region != NULL
3041 && ((bfd_get_section_flags (output_bfd, os->bfd_section)
3042 & SEC_NEVER_LOAD) == 0
3043 || (bfd_get_section_flags (output_bfd, os->bfd_section)
3044 & (SEC_ALLOC | SEC_LOAD))))
3046 os->region->current = dot;
3049 /* Make sure the new address is within the region. */
3050 os_region_check (os, os->region, os->addr_tree,
3051 os->bfd_section->vma);
3053 /* If there's no load address specified, use the run
3054 region as the load region. */
3055 if (os->lma_region == NULL && os->load_base == NULL)
3056 os->lma_region = os->region;
3058 if (os->lma_region != NULL && os->lma_region != os->region)
3060 /* Set load_base, which will be handled later. */
3061 os->load_base = exp_intop (os->lma_region->current);
3062 os->lma_region->current +=
3063 TO_ADDR (os->bfd_section->_raw_size);
3065 os_region_check (os, os->lma_region, NULL,
3066 os->bfd_section->lma);
3072 case lang_constructors_statement_enum:
3073 dot = lang_size_sections_1 (constructor_list.head,
3074 output_section_statement,
3075 &s->wild_statement.children.head,
3076 fill, dot, relax, check_regions);
3079 case lang_data_statement_enum:
3081 unsigned int size = 0;
3083 s->data_statement.output_vma =
3084 dot - output_section_statement->bfd_section->vma;
3085 s->data_statement.output_section =
3086 output_section_statement->bfd_section;
3088 switch (s->data_statement.type)
3106 if (size < TO_SIZE ((unsigned) 1))
3107 size = TO_SIZE ((unsigned) 1);
3108 dot += TO_ADDR (size);
3109 output_section_statement->bfd_section->_raw_size += size;
3110 /* The output section gets contents, and then we inspect for
3111 any flags set in the input script which override any ALLOC. */
3112 output_section_statement->bfd_section->flags |= SEC_HAS_CONTENTS;
3113 if (!(output_section_statement->flags & SEC_NEVER_LOAD))
3115 output_section_statement->bfd_section->flags |=
3116 SEC_ALLOC | SEC_LOAD;
3121 case lang_reloc_statement_enum:
3125 s->reloc_statement.output_vma =
3126 dot - output_section_statement->bfd_section->vma;
3127 s->reloc_statement.output_section =
3128 output_section_statement->bfd_section;
3129 size = bfd_get_reloc_size (s->reloc_statement.howto);
3130 dot += TO_ADDR (size);
3131 output_section_statement->bfd_section->_raw_size += size;
3135 case lang_wild_statement_enum:
3137 dot = lang_size_sections_1 (s->wild_statement.children.head,
3138 output_section_statement,
3139 &s->wild_statement.children.head,
3140 fill, dot, relax, check_regions);
3144 case lang_object_symbols_statement_enum:
3145 link_info.create_object_symbols_section =
3146 output_section_statement->bfd_section;
3148 case lang_output_statement_enum:
3149 case lang_target_statement_enum:
3151 case lang_input_section_enum:
3155 i = (*prev)->input_section.section;
3158 if (i->_cooked_size == 0)
3159 i->_cooked_size = i->_raw_size;
3165 if (! bfd_relax_section (i->owner, i, &link_info, &again))
3166 einfo (_("%P%F: can't relax section: %E\n"));
3170 dot = size_input_section (prev, output_section_statement,
3171 output_section_statement->fill, dot);
3174 case lang_input_statement_enum:
3176 case lang_fill_statement_enum:
3177 s->fill_statement.output_section =
3178 output_section_statement->bfd_section;
3180 fill = s->fill_statement.fill;
3182 case lang_assignment_statement_enum:
3184 bfd_vma newdot = dot;
3186 exp_fold_tree (s->assignment_statement.exp,
3187 output_section_statement,
3188 lang_allocating_phase_enum,
3194 if (output_section_statement == abs_output_section)
3196 /* If we don't have an output section, then just adjust
3197 the default memory address. */
3198 lang_memory_region_lookup (DEFAULT_MEMORY_REGION, FALSE)->current = newdot;
3202 /* Insert a pad after this statement. We can't
3203 put the pad before when relaxing, in case the
3204 assignment references dot. */
3205 insert_pad (&s->header.next, fill, TO_SIZE (newdot - dot),
3206 output_section_statement->bfd_section, dot);
3208 /* Don't neuter the pad below when relaxing. */
3212 /* If dot is advanced, this implies that the section should
3213 have space allocated to it, unless the user has explicitly
3214 stated that the section should never be loaded. */
3215 if (!(output_section_statement->flags & (SEC_NEVER_LOAD | SEC_ALLOC)))
3216 output_section_statement->bfd_section->flags |= SEC_ALLOC;
3223 case lang_padding_statement_enum:
3224 /* If this is the first time lang_size_sections is called,
3225 we won't have any padding statements. If this is the
3226 second or later passes when relaxing, we should allow
3227 padding to shrink. If padding is needed on this pass, it
3228 will be added back in. */
3229 s->padding_statement.size = 0;
3231 /* Make sure output_offset is valid. If relaxation shrinks
3232 the section and this pad isn't needed, it's possible to
3233 have output_offset larger than the final size of the
3234 section. bfd_set_section_contents will complain even for
3235 a pad size of zero. */
3236 s->padding_statement.output_offset
3237 = dot - output_section_statement->bfd_section->vma;
3240 case lang_group_statement_enum:
3241 dot = lang_size_sections_1 (s->group_statement.children.head,
3242 output_section_statement,
3243 &s->group_statement.children.head,
3244 fill, dot, relax, check_regions);
3251 /* We can only get here when relaxing is turned on. */
3252 case lang_address_statement_enum:
3255 prev = &s->header.next;
3262 (lang_statement_union_type *s,
3263 lang_output_section_statement_type *output_section_statement,
3264 lang_statement_union_type **prev,
3268 bfd_boolean check_regions)
3273 /* Callers of exp_fold_tree need to increment this. */
3274 lang_statement_iteration++;
3276 exp_data_seg.phase = exp_dataseg_none;
3277 result = lang_size_sections_1 (s, output_section_statement, prev, fill,
3278 dot, relax, check_regions);
3279 if (exp_data_seg.phase == exp_dataseg_end_seen)
3281 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether
3282 a page could be saved in the data segment. */
3283 bfd_vma first, last;
3285 first = -exp_data_seg.base & (exp_data_seg.pagesize - 1);
3286 last = exp_data_seg.end & (exp_data_seg.pagesize - 1);
3288 && ((exp_data_seg.base & ~(exp_data_seg.pagesize - 1))
3289 != (exp_data_seg.end & ~(exp_data_seg.pagesize - 1)))
3290 && first + last <= exp_data_seg.pagesize)
3292 exp_data_seg.phase = exp_dataseg_adjust;
3293 result = lang_size_sections_1 (s, output_section_statement, prev,
3294 fill, dot, relax, check_regions);
3298 /* Some backend relaxers want to refer to the output section size. Give
3299 them a section size that does not change on the next call while they
3300 relax. We can't set this at top because lang_reset_memory_regions
3301 which is called before we get here, sets _raw_size to 0 on relaxing
3303 for (o = output_bfd->sections; o != NULL; o = o->next)
3304 o->_cooked_size = o->_raw_size;
3309 /* Worker function for lang_do_assignments. Recursiveness goes here. */
3312 lang_do_assignments_1
3313 (lang_statement_union_type *s,
3314 lang_output_section_statement_type *output_section_statement,
3318 for (; s != NULL; s = s->header.next)
3320 switch (s->header.type)
3322 case lang_constructors_statement_enum:
3323 dot = lang_do_assignments_1 (constructor_list.head,
3324 output_section_statement,
3329 case lang_output_section_statement_enum:
3331 lang_output_section_statement_type *os;
3333 os = &(s->output_section_statement);
3334 if (os->bfd_section != NULL)
3336 dot = os->bfd_section->vma;
3337 (void) lang_do_assignments_1 (os->children.head, os,
3339 dot = (os->bfd_section->vma
3340 + TO_ADDR (os->bfd_section->_raw_size));
3345 /* If nothing has been placed into the output section then
3346 it won't have a bfd_section. */
3347 if (os->bfd_section)
3349 os->bfd_section->lma
3350 = exp_get_abs_int (os->load_base, 0, "load base",
3351 lang_final_phase_enum);
3356 case lang_wild_statement_enum:
3358 dot = lang_do_assignments_1 (s->wild_statement.children.head,
3359 output_section_statement,
3364 case lang_object_symbols_statement_enum:
3365 case lang_output_statement_enum:
3366 case lang_target_statement_enum:
3368 case lang_common_statement_enum:
3371 case lang_data_statement_enum:
3373 etree_value_type value;
3375 value = exp_fold_tree (s->data_statement.exp,
3377 lang_final_phase_enum, dot, &dot);
3378 s->data_statement.value = value.value;
3380 einfo (_("%F%P: invalid data statement\n"));
3384 switch (s->data_statement.type)
3402 if (size < TO_SIZE ((unsigned) 1))
3403 size = TO_SIZE ((unsigned) 1);
3404 dot += TO_ADDR (size);
3408 case lang_reloc_statement_enum:
3410 etree_value_type value;
3412 value = exp_fold_tree (s->reloc_statement.addend_exp,
3414 lang_final_phase_enum, dot, &dot);
3415 s->reloc_statement.addend_value = value.value;
3417 einfo (_("%F%P: invalid reloc statement\n"));
3419 dot += TO_ADDR (bfd_get_reloc_size (s->reloc_statement.howto));
3422 case lang_input_section_enum:
3424 asection *in = s->input_section.section;
3426 if (in->_cooked_size != 0)
3427 dot += TO_ADDR (in->_cooked_size);
3429 dot += TO_ADDR (in->_raw_size);
3433 case lang_input_statement_enum:
3435 case lang_fill_statement_enum:
3436 fill = s->fill_statement.fill;
3438 case lang_assignment_statement_enum:
3440 exp_fold_tree (s->assignment_statement.exp,
3441 output_section_statement,
3442 lang_final_phase_enum,
3448 case lang_padding_statement_enum:
3449 dot += TO_ADDR (s->padding_statement.size);
3452 case lang_group_statement_enum:
3453 dot = lang_do_assignments_1 (s->group_statement.children.head,
3454 output_section_statement,
3462 case lang_address_statement_enum:
3471 lang_do_assignments (lang_statement_union_type *s,
3472 lang_output_section_statement_type *output_section_statement,
3476 /* Callers of exp_fold_tree need to increment this. */
3477 lang_statement_iteration++;
3478 lang_do_assignments_1 (s, output_section_statement, fill, dot);
3481 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
3482 operator .startof. (section_name), it produces an undefined symbol
3483 .startof.section_name. Similarly, when it sees
3484 .sizeof. (section_name), it produces an undefined symbol
3485 .sizeof.section_name. For all the output sections, we look for
3486 such symbols, and set them to the correct value. */
3489 lang_set_startof (void)
3493 if (link_info.relocatable)
3496 for (s = output_bfd->sections; s != NULL; s = s->next)
3498 const char *secname;
3500 struct bfd_link_hash_entry *h;
3502 secname = bfd_get_section_name (output_bfd, s);
3503 buf = xmalloc (10 + strlen (secname));
3505 sprintf (buf, ".startof.%s", secname);
3506 h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE, TRUE);
3507 if (h != NULL && h->type == bfd_link_hash_undefined)
3509 h->type = bfd_link_hash_defined;
3510 h->u.def.value = bfd_get_section_vma (output_bfd, s);
3511 h->u.def.section = bfd_abs_section_ptr;
3514 sprintf (buf, ".sizeof.%s", secname);
3515 h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE, TRUE);
3516 if (h != NULL && h->type == bfd_link_hash_undefined)
3518 h->type = bfd_link_hash_defined;
3519 if (s->_cooked_size != 0)
3520 h->u.def.value = TO_ADDR (s->_cooked_size);
3522 h->u.def.value = TO_ADDR (s->_raw_size);
3523 h->u.def.section = bfd_abs_section_ptr;
3533 struct bfd_link_hash_entry *h;
3536 if (link_info.relocatable || link_info.shared)
3541 if (entry_symbol.name == NULL)
3543 /* No entry has been specified. Look for start, but don't warn
3544 if we don't find it. */
3545 entry_symbol.name = "start";
3549 h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
3550 FALSE, FALSE, TRUE);
3552 && (h->type == bfd_link_hash_defined
3553 || h->type == bfd_link_hash_defweak)
3554 && h->u.def.section->output_section != NULL)
3558 val = (h->u.def.value
3559 + bfd_get_section_vma (output_bfd,
3560 h->u.def.section->output_section)
3561 + h->u.def.section->output_offset);
3562 if (! bfd_set_start_address (output_bfd, val))
3563 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol.name);
3570 /* We couldn't find the entry symbol. Try parsing it as a
3572 val = bfd_scan_vma (entry_symbol.name, &send, 0);
3575 if (! bfd_set_start_address (output_bfd, val))
3576 einfo (_("%P%F: can't set start address\n"));
3582 /* Can't find the entry symbol, and it's not a number. Use
3583 the first address in the text section. */
3584 ts = bfd_get_section_by_name (output_bfd, entry_section);
3588 einfo (_("%P: warning: cannot find entry symbol %s; defaulting to %V\n"),
3590 bfd_get_section_vma (output_bfd, ts));
3591 if (! bfd_set_start_address (output_bfd,
3592 bfd_get_section_vma (output_bfd,
3594 einfo (_("%P%F: can't set start address\n"));
3599 einfo (_("%P: warning: cannot find entry symbol %s; not setting start address\n"),
3605 bfd_hash_table_free (&lang_definedness_table);
3608 /* This is a small function used when we want to ignore errors from
3612 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED, ...)
3614 /* Don't do anything. */
3617 /* Check that the architecture of all the input files is compatible
3618 with the output file. Also call the backend to let it do any
3619 other checking that is needed. */
3624 lang_statement_union_type *file;
3626 const bfd_arch_info_type *compatible;
3628 for (file = file_chain.head; file != NULL; file = file->input_statement.next)
3630 input_bfd = file->input_statement.the_bfd;
3631 compatible = bfd_arch_get_compatible (input_bfd, output_bfd,
3632 command_line.accept_unknown_input_arch);
3634 /* In general it is not possible to perform a relocatable
3635 link between differing object formats when the input
3636 file has relocations, because the relocations in the
3637 input format may not have equivalent representations in
3638 the output format (and besides BFD does not translate
3639 relocs for other link purposes than a final link). */
3640 if ((link_info.relocatable || link_info.emitrelocations)
3641 && (compatible == NULL
3642 || bfd_get_flavour (input_bfd) != bfd_get_flavour (output_bfd))
3643 && (bfd_get_file_flags (input_bfd) & HAS_RELOC) != 0)
3645 einfo (_("%P%F: Relocatable linking with relocations from format %s (%B) to format %s (%B) is not supported\n"),
3646 bfd_get_target (input_bfd), input_bfd,
3647 bfd_get_target (output_bfd), output_bfd);
3648 /* einfo with %F exits. */
3651 if (compatible == NULL)
3653 if (command_line.warn_mismatch)
3654 einfo (_("%P: warning: %s architecture of input file `%B' is incompatible with %s output\n"),
3655 bfd_printable_name (input_bfd), input_bfd,
3656 bfd_printable_name (output_bfd));
3658 else if (bfd_count_sections (input_bfd))
3660 /* If the input bfd has no contents, it shouldn't set the
3661 private data of the output bfd. */
3663 bfd_error_handler_type pfn = NULL;
3665 /* If we aren't supposed to warn about mismatched input
3666 files, temporarily set the BFD error handler to a
3667 function which will do nothing. We still want to call
3668 bfd_merge_private_bfd_data, since it may set up
3669 information which is needed in the output file. */
3670 if (! command_line.warn_mismatch)
3671 pfn = bfd_set_error_handler (ignore_bfd_errors);
3672 if (! bfd_merge_private_bfd_data (input_bfd, output_bfd))
3674 if (command_line.warn_mismatch)
3675 einfo (_("%E%X: failed to merge target specific data of file %B\n"),
3678 if (! command_line.warn_mismatch)
3679 bfd_set_error_handler (pfn);
3684 /* Look through all the global common symbols and attach them to the
3685 correct section. The -sort-common command line switch may be used
3686 to roughly sort the entries by size. */
3691 if (command_line.inhibit_common_definition)
3693 if (link_info.relocatable
3694 && ! command_line.force_common_definition)
3697 if (! config.sort_common)
3698 bfd_link_hash_traverse (link_info.hash, lang_one_common, NULL);
3703 for (power = 4; power >= 0; power--)
3704 bfd_link_hash_traverse (link_info.hash, lang_one_common, &power);
3708 /* Place one common symbol in the correct section. */
3711 lang_one_common (struct bfd_link_hash_entry *h, void *info)
3713 unsigned int power_of_two;
3717 if (h->type != bfd_link_hash_common)
3721 power_of_two = h->u.c.p->alignment_power;
3723 if (config.sort_common
3724 && power_of_two < (unsigned int) *(int *) info)
3727 section = h->u.c.p->section;
3729 /* Increase the size of the section to align the common sym. */
3730 section->_cooked_size += ((bfd_vma) 1 << (power_of_two + opb_shift)) - 1;
3731 section->_cooked_size &= (- (bfd_vma) 1 << (power_of_two + opb_shift));
3733 /* Adjust the alignment if necessary. */
3734 if (power_of_two > section->alignment_power)
3735 section->alignment_power = power_of_two;
3737 /* Change the symbol from common to defined. */
3738 h->type = bfd_link_hash_defined;
3739 h->u.def.section = section;
3740 h->u.def.value = section->_cooked_size;
3742 /* Increase the size of the section. */
3743 section->_cooked_size += size;
3745 /* Make sure the section is allocated in memory, and make sure that
3746 it is no longer a common section. */
3747 section->flags |= SEC_ALLOC;
3748 section->flags &= ~SEC_IS_COMMON;
3750 if (config.map_file != NULL)
3752 static bfd_boolean header_printed;
3757 if (! header_printed)
3759 minfo (_("\nAllocating common symbols\n"));
3760 minfo (_("Common symbol size file\n\n"));
3761 header_printed = TRUE;
3764 name = demangle (h->root.string);
3766 len = strlen (name);
3781 if (size <= 0xffffffff)
3782 sprintf (buf, "%lx", (unsigned long) size);
3784 sprintf_vma (buf, size);
3794 minfo ("%B\n", section->owner);
3800 /* Run through the input files and ensure that every input section has
3801 somewhere to go. If one is found without a destination then create
3802 an input request and place it into the statement tree. */
3805 lang_place_orphans (void)
3807 LANG_FOR_EACH_INPUT_STATEMENT (file)
3811 for (s = file->the_bfd->sections; s != NULL; s = s->next)
3813 if (s->output_section == NULL)
3815 /* This section of the file is not attached, root
3816 around for a sensible place for it to go. */
3818 if (file->just_syms_flag)
3822 else if (strcmp (s->name, "COMMON") == 0)
3824 /* This is a lonely common section which must have
3825 come from an archive. We attach to the section
3826 with the wildcard. */
3827 if (! link_info.relocatable
3828 || command_line.force_common_definition)
3830 if (default_common_section == NULL)
3833 /* This message happens when using the
3834 svr3.ifile linker script, so I have
3836 info_msg (_("%P: no [COMMON] command, defaulting to .bss\n"));
3838 default_common_section =
3839 lang_output_section_statement_lookup (".bss");
3842 lang_add_section (&default_common_section->children, s,
3843 default_common_section, file);
3846 else if (ldemul_place_orphan (file, s))
3850 lang_output_section_statement_type *os;
3852 os = lang_output_section_statement_lookup (s->name);
3853 lang_add_section (&os->children, s, os, file);
3861 lang_set_flags (lang_memory_region_type *ptr, const char *flags, int invert)
3863 flagword *ptr_flags;
3865 ptr_flags = invert ? &ptr->not_flags : &ptr->flags;
3871 *ptr_flags |= SEC_ALLOC;
3875 *ptr_flags |= SEC_READONLY;
3879 *ptr_flags |= SEC_DATA;
3883 *ptr_flags |= SEC_CODE;
3888 *ptr_flags |= SEC_LOAD;
3892 einfo (_("%P%F: invalid syntax in flags\n"));
3899 /* Call a function on each input file. This function will be called
3900 on an archive, but not on the elements. */
3903 lang_for_each_input_file (void (*func) (lang_input_statement_type *))
3905 lang_input_statement_type *f;
3907 for (f = (lang_input_statement_type *) input_file_chain.head;
3909 f = (lang_input_statement_type *) f->next_real_file)
3913 /* Call a function on each file. The function will be called on all
3914 the elements of an archive which are included in the link, but will
3915 not be called on the archive file itself. */
3918 lang_for_each_file (void (*func) (lang_input_statement_type *))
3920 LANG_FOR_EACH_INPUT_STATEMENT (f)
3931 lang_for_each_input_section (void (*func) (bfd *ab, asection *as))
3933 LANG_FOR_EACH_INPUT_STATEMENT (f)
3937 for (s = f->the_bfd->sections; s != NULL; s = s->next)
3938 func (f->the_bfd, s);
3945 ldlang_add_file (lang_input_statement_type *entry)
3949 lang_statement_append (&file_chain,
3950 (lang_statement_union_type *) entry,
3953 /* The BFD linker needs to have a list of all input BFDs involved in
3955 ASSERT (entry->the_bfd->link_next == NULL);
3956 ASSERT (entry->the_bfd != output_bfd);
3957 for (pp = &link_info.input_bfds; *pp != NULL; pp = &(*pp)->link_next)
3959 *pp = entry->the_bfd;
3960 entry->the_bfd->usrdata = entry;
3961 bfd_set_gp_size (entry->the_bfd, g_switch_value);
3963 /* Look through the sections and check for any which should not be
3964 included in the link. We need to do this now, so that we can
3965 notice when the backend linker tries to report multiple
3966 definition errors for symbols which are in sections we aren't
3967 going to link. FIXME: It might be better to entirely ignore
3968 symbols which are defined in sections which are going to be
3969 discarded. This would require modifying the backend linker for
3970 each backend which might set the SEC_LINK_ONCE flag. If we do
3971 this, we should probably handle SEC_EXCLUDE in the same way. */
3973 bfd_map_over_sections (entry->the_bfd, section_already_linked, entry);
3977 lang_add_output (const char *name, int from_script)
3979 /* Make -o on command line override OUTPUT in script. */
3980 if (!had_output_filename || !from_script)
3982 output_filename = name;
3983 had_output_filename = TRUE;
3987 static lang_output_section_statement_type *current_section;
3998 for (l = 0; l < 32; l++)
4000 if (i >= (unsigned int) x)
4008 lang_output_section_statement_type *
4009 lang_enter_output_section_statement (const char *output_section_statement_name,
4010 etree_type *address_exp,
4011 enum section_type sectype,
4013 etree_type *subalign,
4016 lang_output_section_statement_type *os;
4020 lang_output_section_statement_lookup (output_section_statement_name);
4022 /* Add this statement to tree. */
4024 add_statement (lang_output_section_statement_enum,
4025 output_section_statement);
4027 /* Make next things chain into subchain of this. */
4029 if (os->addr_tree == NULL)
4031 os->addr_tree = address_exp;
4033 os->sectype = sectype;
4034 if (sectype != noload_section)
4035 os->flags = SEC_NO_FLAGS;
4037 os->flags = SEC_NEVER_LOAD;
4038 os->block_value = 1;
4039 stat_ptr = &os->children;
4041 os->subsection_alignment =
4042 topower (exp_get_value_int (subalign, -1, "subsection alignment", 0));
4043 os->section_alignment =
4044 topower (exp_get_value_int (align, -1, "section alignment", 0));
4046 os->load_base = ebase;
4053 lang_output_statement_type *new =
4054 new_stat (lang_output_statement, stat_ptr);
4056 new->name = output_filename;
4059 /* Reset the current counters in the regions. */
4062 lang_reset_memory_regions (void)
4064 lang_memory_region_type *p = lang_memory_region_list;
4067 for (p = lang_memory_region_list; p != NULL; p = p->next)
4069 p->old_length = (bfd_size_type) (p->current - p->origin);
4070 p->current = p->origin;
4073 for (o = output_bfd->sections; o != NULL; o = o->next)
4077 /* If the wild pattern was marked KEEP, the member sections
4078 should be as well. */
4081 gc_section_callback (lang_wild_statement_type *ptr,
4082 struct wildcard_list *sec ATTRIBUTE_UNUSED,
4084 lang_input_statement_type *file ATTRIBUTE_UNUSED,
4085 void *data ATTRIBUTE_UNUSED)
4087 if (ptr->keep_sections)
4088 section->flags |= SEC_KEEP;
4091 /* Handle a wild statement, marking it against GC. */
4094 lang_gc_wild (lang_wild_statement_type *s)
4096 walk_wild (s, gc_section_callback, NULL);
4099 /* Iterate over sections marking them against GC. */
4102 lang_gc_sections_1 (lang_statement_union_type *s)
4104 for (; s != NULL; s = s->header.next)
4106 switch (s->header.type)
4108 case lang_wild_statement_enum:
4109 lang_gc_wild (&s->wild_statement);
4111 case lang_constructors_statement_enum:
4112 lang_gc_sections_1 (constructor_list.head);
4114 case lang_output_section_statement_enum:
4115 lang_gc_sections_1 (s->output_section_statement.children.head);
4117 case lang_group_statement_enum:
4118 lang_gc_sections_1 (s->group_statement.children.head);
4127 lang_gc_sections (void)
4129 struct bfd_link_hash_entry *h;
4130 ldlang_undef_chain_list_type *ulist;
4132 /* Keep all sections so marked in the link script. */
4134 lang_gc_sections_1 (statement_list.head);
4136 /* Keep all sections containing symbols undefined on the command-line,
4137 and the section containing the entry symbol. */
4139 for (ulist = link_info.gc_sym_list; ulist; ulist = ulist->next)
4141 h = bfd_link_hash_lookup (link_info.hash, ulist->name,
4142 FALSE, FALSE, FALSE);
4145 && (h->type == bfd_link_hash_defined
4146 || h->type == bfd_link_hash_defweak)
4147 && ! bfd_is_abs_section (h->u.def.section))
4149 h->u.def.section->flags |= SEC_KEEP;
4153 bfd_gc_sections (output_bfd, &link_info);
4159 lang_reasonable_defaults ();
4160 current_target = default_target;
4162 /* Open the output file. */
4163 lang_for_each_statement (ldlang_open_output);
4166 ldemul_create_output_section_statements ();
4168 /* Add to the hash table all undefineds on the command line. */
4169 lang_place_undefineds ();
4171 already_linked_table_init ();
4173 /* Create a bfd for each input file. */
4174 current_target = default_target;
4175 open_input_bfds (statement_list.head, FALSE);
4177 link_info.gc_sym_list = &entry_symbol;
4178 if (entry_symbol.name == NULL)
4179 link_info.gc_sym_list = ldlang_undef_chain_list_head;
4181 ldemul_after_open ();
4183 already_linked_table_free ();
4185 /* Make sure that we're not mixing architectures. We call this
4186 after all the input files have been opened, but before we do any
4187 other processing, so that any operations merge_private_bfd_data
4188 does on the output file will be known during the rest of the
4192 /* Handle .exports instead of a version script if we're told to do so. */
4193 if (command_line.version_exports_section)
4194 lang_do_version_exports_section ();
4196 /* Build all sets based on the information gathered from the input
4198 ldctor_build_sets ();
4200 /* Remove unreferenced sections if asked to. */
4201 if (command_line.gc_sections)
4202 lang_gc_sections ();
4204 /* If there were any SEC_MERGE sections, finish their merging, so that
4205 section sizes can be computed. This has to be done after GC of sections,
4206 so that GCed sections are not merged, but before assigning output
4207 sections, since removing whole input sections is hard then. */
4208 bfd_merge_sections (output_bfd, &link_info);
4210 /* Size up the common data. */
4213 /* Run through the contours of the script and attach input sections
4214 to the correct output sections. */
4215 map_input_to_output_sections (statement_list.head, NULL, NULL);
4217 /* Find any sections not attached explicitly and handle them. */
4218 lang_place_orphans ();
4220 if (! link_info.relocatable)
4222 /* Look for a text section and set the readonly attribute in it. */
4223 asection *found = bfd_get_section_by_name (output_bfd, ".text");
4227 if (config.text_read_only)
4228 found->flags |= SEC_READONLY;
4230 found->flags &= ~SEC_READONLY;
4234 /* Do anything special before sizing sections. This is where ELF
4235 and other back-ends size dynamic sections. */
4236 ldemul_before_allocation ();
4238 if (!link_info.relocatable)
4239 strip_excluded_output_sections ();
4241 /* We must record the program headers before we try to fix the
4242 section positions, since they will affect SIZEOF_HEADERS. */
4243 lang_record_phdrs ();
4245 /* Size up the sections. */
4246 lang_size_sections (statement_list.head, abs_output_section,
4247 &statement_list.head, 0, 0, NULL,
4248 command_line.relax ? FALSE : TRUE);
4250 /* Now run around and relax if we can. */
4251 if (command_line.relax)
4253 /* Keep relaxing until bfd_relax_section gives up. */
4254 bfd_boolean relax_again;
4258 relax_again = FALSE;
4260 /* Note: pe-dll.c does something like this also. If you find
4261 you need to change this code, you probably need to change
4262 pe-dll.c also. DJ */
4264 /* Do all the assignments with our current guesses as to
4266 lang_do_assignments (statement_list.head, abs_output_section,
4269 /* We must do this after lang_do_assignments, because it uses
4271 lang_reset_memory_regions ();
4273 /* Perform another relax pass - this time we know where the
4274 globals are, so can make a better guess. */
4275 lang_size_sections (statement_list.head, abs_output_section,
4276 &statement_list.head, 0, 0, &relax_again, FALSE);
4278 /* If the normal relax is done and the relax finalize pass
4279 is not performed yet, we perform another relax pass. */
4280 if (!relax_again && link_info.need_relax_finalize)
4282 link_info.need_relax_finalize = FALSE;
4286 while (relax_again);
4288 /* Final extra sizing to report errors. */
4289 lang_do_assignments (statement_list.head, abs_output_section, NULL, 0);
4290 lang_reset_memory_regions ();
4291 lang_size_sections (statement_list.head, abs_output_section,
4292 &statement_list.head, 0, 0, NULL, TRUE);
4295 /* See if anything special should be done now we know how big
4297 ldemul_after_allocation ();
4299 /* Fix any .startof. or .sizeof. symbols. */
4300 lang_set_startof ();
4302 /* Do all the assignments, now that we know the final resting places
4303 of all the symbols. */
4305 lang_do_assignments (statement_list.head, abs_output_section, NULL, 0);
4307 /* Make sure that the section addresses make sense. */
4308 if (! link_info.relocatable
4309 && command_line.check_section_addresses)
4310 lang_check_section_addresses ();
4318 /* EXPORTED TO YACC */
4321 lang_add_wild (struct wildcard_spec *filespec,
4322 struct wildcard_list *section_list,
4323 bfd_boolean keep_sections)
4325 struct wildcard_list *curr, *next;
4326 lang_wild_statement_type *new;
4328 /* Reverse the list as the parser puts it back to front. */
4329 for (curr = section_list, section_list = NULL;
4331 section_list = curr, curr = next)
4333 if (curr->spec.name != NULL && strcmp (curr->spec.name, "COMMON") == 0)
4334 placed_commons = TRUE;
4337 curr->next = section_list;
4340 if (filespec != NULL && filespec->name != NULL)
4342 if (strcmp (filespec->name, "*") == 0)
4343 filespec->name = NULL;
4344 else if (! wildcardp (filespec->name))
4345 lang_has_input_file = TRUE;
4348 new = new_stat (lang_wild_statement, stat_ptr);
4349 new->filename = NULL;
4350 new->filenames_sorted = FALSE;
4351 if (filespec != NULL)
4353 new->filename = filespec->name;
4354 new->filenames_sorted = filespec->sorted;
4356 new->section_list = section_list;
4357 new->keep_sections = keep_sections;
4358 lang_list_init (&new->children);
4362 lang_section_start (const char *name, etree_type *address)
4364 lang_address_statement_type *ad;
4366 ad = new_stat (lang_address_statement, stat_ptr);
4367 ad->section_name = name;
4368 ad->address = address;
4371 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
4372 because of a -e argument on the command line, or zero if this is
4373 called by ENTRY in a linker script. Command line arguments take
4377 lang_add_entry (const char *name, bfd_boolean cmdline)
4379 if (entry_symbol.name == NULL
4381 || ! entry_from_cmdline)
4383 entry_symbol.name = name;
4384 entry_from_cmdline = cmdline;
4389 lang_add_target (const char *name)
4391 lang_target_statement_type *new = new_stat (lang_target_statement,
4399 lang_add_map (const char *name)
4406 map_option_f = TRUE;
4414 lang_add_fill (fill_type *fill)
4416 lang_fill_statement_type *new = new_stat (lang_fill_statement,
4423 lang_add_data (int type, union etree_union *exp)
4426 lang_data_statement_type *new = new_stat (lang_data_statement,
4434 /* Create a new reloc statement. RELOC is the BFD relocation type to
4435 generate. HOWTO is the corresponding howto structure (we could
4436 look this up, but the caller has already done so). SECTION is the
4437 section to generate a reloc against, or NAME is the name of the
4438 symbol to generate a reloc against. Exactly one of SECTION and
4439 NAME must be NULL. ADDEND is an expression for the addend. */
4442 lang_add_reloc (bfd_reloc_code_real_type reloc,
4443 reloc_howto_type *howto,
4446 union etree_union *addend)
4448 lang_reloc_statement_type *p = new_stat (lang_reloc_statement, stat_ptr);
4452 p->section = section;
4454 p->addend_exp = addend;
4456 p->addend_value = 0;
4457 p->output_section = NULL;
4461 lang_assignment_statement_type *
4462 lang_add_assignment (etree_type *exp)
4464 lang_assignment_statement_type *new = new_stat (lang_assignment_statement,
4472 lang_add_attribute (enum statement_enum attribute)
4474 new_statement (attribute, sizeof (lang_statement_union_type), stat_ptr);
4478 lang_startup (const char *name)
4480 if (startup_file != NULL)
4482 einfo (_("%P%Fmultiple STARTUP files\n"));
4484 first_file->filename = name;
4485 first_file->local_sym_name = name;
4486 first_file->real = TRUE;
4488 startup_file = name;
4492 lang_float (bfd_boolean maybe)
4494 lang_float_flag = maybe;
4498 /* Work out the load- and run-time regions from a script statement, and
4499 store them in *LMA_REGION and *REGION respectively.
4501 MEMSPEC is the name of the run-time region, or the value of
4502 DEFAULT_MEMORY_REGION if the statement didn't specify one.
4503 LMA_MEMSPEC is the name of the load-time region, or null if the
4504 statement didn't specify one.HAVE_LMA_P is TRUE if the statement
4505 had an explicit load address.
4507 It is an error to specify both a load region and a load address. */
4510 lang_get_regions (lang_memory_region_type **region,
4511 lang_memory_region_type **lma_region,
4512 const char *memspec,
4513 const char *lma_memspec,
4514 bfd_boolean have_lma,
4515 bfd_boolean have_vma)
4517 *lma_region = lang_memory_region_lookup (lma_memspec, FALSE);
4519 /* If no runtime region or VMA has been specified, but the load region has
4520 been specified, then use the load region for the runtime region as well. */
4521 if (lma_memspec != NULL
4523 && strcmp (memspec, DEFAULT_MEMORY_REGION) == 0)
4524 *region = *lma_region;
4526 *region = lang_memory_region_lookup (memspec, FALSE);
4528 if (have_lma && lma_memspec != 0)
4529 einfo (_("%X%P:%S: section has both a load address and a load region\n"));
4533 lang_leave_output_section_statement (fill_type *fill, const char *memspec,
4534 lang_output_section_phdr_list *phdrs,
4535 const char *lma_memspec)
4537 lang_get_regions (¤t_section->region,
4538 ¤t_section->lma_region,
4539 memspec, lma_memspec,
4540 current_section->load_base != NULL,
4541 current_section->addr_tree != NULL);
4542 current_section->fill = fill;
4543 current_section->phdrs = phdrs;
4544 stat_ptr = &statement_list;
4547 /* Create an absolute symbol with the given name with the value of the
4548 address of first byte of the section named.
4550 If the symbol already exists, then do nothing. */
4553 lang_abs_symbol_at_beginning_of (const char *secname, const char *name)
4555 struct bfd_link_hash_entry *h;
4557 h = bfd_link_hash_lookup (link_info.hash, name, TRUE, TRUE, TRUE);
4559 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4561 if (h->type == bfd_link_hash_new
4562 || h->type == bfd_link_hash_undefined)
4566 h->type = bfd_link_hash_defined;
4568 sec = bfd_get_section_by_name (output_bfd, secname);
4572 h->u.def.value = bfd_get_section_vma (output_bfd, sec);
4574 h->u.def.section = bfd_abs_section_ptr;
4578 /* Create an absolute symbol with the given name with the value of the
4579 address of the first byte after the end of the section named.
4581 If the symbol already exists, then do nothing. */
4584 lang_abs_symbol_at_end_of (const char *secname, const char *name)
4586 struct bfd_link_hash_entry *h;
4588 h = bfd_link_hash_lookup (link_info.hash, name, TRUE, TRUE, TRUE);
4590 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4592 if (h->type == bfd_link_hash_new
4593 || h->type == bfd_link_hash_undefined)
4597 h->type = bfd_link_hash_defined;
4599 sec = bfd_get_section_by_name (output_bfd, secname);
4603 h->u.def.value = (bfd_get_section_vma (output_bfd, sec)
4604 + TO_ADDR (bfd_section_size (output_bfd, sec)));
4606 h->u.def.section = bfd_abs_section_ptr;
4611 lang_statement_append (lang_statement_list_type *list,
4612 lang_statement_union_type *element,
4613 lang_statement_union_type **field)
4615 *(list->tail) = element;
4619 /* Set the output format type. -oformat overrides scripts. */
4622 lang_add_output_format (const char *format,
4627 if (output_target == NULL || !from_script)
4629 if (command_line.endian == ENDIAN_BIG
4632 else if (command_line.endian == ENDIAN_LITTLE
4636 output_target = format;
4640 /* Enter a group. This creates a new lang_group_statement, and sets
4641 stat_ptr to build new statements within the group. */
4644 lang_enter_group (void)
4646 lang_group_statement_type *g;
4648 g = new_stat (lang_group_statement, stat_ptr);
4649 lang_list_init (&g->children);
4650 stat_ptr = &g->children;
4653 /* Leave a group. This just resets stat_ptr to start writing to the
4654 regular list of statements again. Note that this will not work if
4655 groups can occur inside anything else which can adjust stat_ptr,
4656 but currently they can't. */
4659 lang_leave_group (void)
4661 stat_ptr = &statement_list;
4664 /* Add a new program header. This is called for each entry in a PHDRS
4665 command in a linker script. */
4668 lang_new_phdr (const char *name,
4670 bfd_boolean filehdr,
4675 struct lang_phdr *n, **pp;
4677 n = stat_alloc (sizeof (struct lang_phdr));
4680 n->type = exp_get_value_int (type, 0, "program header type",
4681 lang_final_phase_enum);
4682 n->filehdr = filehdr;
4687 for (pp = &lang_phdr_list; *pp != NULL; pp = &(*pp)->next)
4692 /* Record the program header information in the output BFD. FIXME: We
4693 should not be calling an ELF specific function here. */
4696 lang_record_phdrs (void)
4700 lang_output_section_phdr_list *last;
4701 struct lang_phdr *l;
4702 lang_statement_union_type *u;
4705 secs = xmalloc (alc * sizeof (asection *));
4707 for (l = lang_phdr_list; l != NULL; l = l->next)
4714 for (u = lang_output_section_statement.head;
4716 u = u->output_section_statement.next)
4718 lang_output_section_statement_type *os;
4719 lang_output_section_phdr_list *pl;
4721 os = &u->output_section_statement;
4728 if (os->sectype == noload_section
4729 || os->bfd_section == NULL
4730 || (os->bfd_section->flags & SEC_ALLOC) == 0)
4735 if (os->bfd_section == NULL)
4738 for (; pl != NULL; pl = pl->next)
4740 if (strcmp (pl->name, l->name) == 0)
4745 secs = xrealloc (secs, alc * sizeof (asection *));
4747 secs[c] = os->bfd_section;
4754 if (l->flags == NULL)
4757 flags = exp_get_vma (l->flags, 0, "phdr flags",
4758 lang_final_phase_enum);
4763 at = exp_get_vma (l->at, 0, "phdr load address",
4764 lang_final_phase_enum);
4766 if (! bfd_record_phdr (output_bfd, l->type,
4767 l->flags != NULL, flags, l->at != NULL,
4768 at, l->filehdr, l->phdrs, c, secs))
4769 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
4774 /* Make sure all the phdr assignments succeeded. */
4775 for (u = lang_output_section_statement.head;
4777 u = u->output_section_statement.next)
4779 lang_output_section_phdr_list *pl;
4781 if (u->output_section_statement.bfd_section == NULL)
4784 for (pl = u->output_section_statement.phdrs;
4787 if (! pl->used && strcmp (pl->name, "NONE") != 0)
4788 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
4789 u->output_section_statement.name, pl->name);
4793 /* Record a list of sections which may not be cross referenced. */
4796 lang_add_nocrossref (lang_nocrossref_type *l)
4798 struct lang_nocrossrefs *n;
4800 n = xmalloc (sizeof *n);
4801 n->next = nocrossref_list;
4803 nocrossref_list = n;
4805 /* Set notice_all so that we get informed about all symbols. */
4806 link_info.notice_all = TRUE;
4809 /* Overlay handling. We handle overlays with some static variables. */
4811 /* The overlay virtual address. */
4812 static etree_type *overlay_vma;
4813 /* And subsection alignment. */
4814 static etree_type *overlay_subalign;
4816 /* An expression for the maximum section size seen so far. */
4817 static etree_type *overlay_max;
4819 /* A list of all the sections in this overlay. */
4821 struct overlay_list {
4822 struct overlay_list *next;
4823 lang_output_section_statement_type *os;
4826 static struct overlay_list *overlay_list;
4828 /* Start handling an overlay. */
4831 lang_enter_overlay (etree_type *vma_expr, etree_type *subalign)
4833 /* The grammar should prevent nested overlays from occurring. */
4834 ASSERT (overlay_vma == NULL
4835 && overlay_subalign == NULL
4836 && overlay_max == NULL);
4838 overlay_vma = vma_expr;
4839 overlay_subalign = subalign;
4842 /* Start a section in an overlay. We handle this by calling
4843 lang_enter_output_section_statement with the correct VMA.
4844 lang_leave_overlay sets up the LMA and memory regions. */
4847 lang_enter_overlay_section (const char *name)
4849 struct overlay_list *n;
4852 lang_enter_output_section_statement (name, overlay_vma, normal_section,
4853 0, overlay_subalign, 0);
4855 /* If this is the first section, then base the VMA of future
4856 sections on this one. This will work correctly even if `.' is
4857 used in the addresses. */
4858 if (overlay_list == NULL)
4859 overlay_vma = exp_nameop (ADDR, name);
4861 /* Remember the section. */
4862 n = xmalloc (sizeof *n);
4863 n->os = current_section;
4864 n->next = overlay_list;
4867 size = exp_nameop (SIZEOF, name);
4869 /* Arrange to work out the maximum section end address. */
4870 if (overlay_max == NULL)
4873 overlay_max = exp_binop (MAX_K, overlay_max, size);
4876 /* Finish a section in an overlay. There isn't any special to do
4880 lang_leave_overlay_section (fill_type *fill,
4881 lang_output_section_phdr_list *phdrs)
4888 name = current_section->name;
4890 /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory
4891 region and that no load-time region has been specified. It doesn't
4892 really matter what we say here, since lang_leave_overlay will
4894 lang_leave_output_section_statement (fill, DEFAULT_MEMORY_REGION, phdrs, 0);
4896 /* Define the magic symbols. */
4898 clean = xmalloc (strlen (name) + 1);
4900 for (s1 = name; *s1 != '\0'; s1++)
4901 if (ISALNUM (*s1) || *s1 == '_')
4905 buf = xmalloc (strlen (clean) + sizeof "__load_start_");
4906 sprintf (buf, "__load_start_%s", clean);
4907 lang_add_assignment (exp_assop ('=', buf,
4908 exp_nameop (LOADADDR, name)));
4910 buf = xmalloc (strlen (clean) + sizeof "__load_stop_");
4911 sprintf (buf, "__load_stop_%s", clean);
4912 lang_add_assignment (exp_assop ('=', buf,
4914 exp_nameop (LOADADDR, name),
4915 exp_nameop (SIZEOF, name))));
4920 /* Finish an overlay. If there are any overlay wide settings, this
4921 looks through all the sections in the overlay and sets them. */
4924 lang_leave_overlay (etree_type *lma_expr,
4927 const char *memspec,
4928 lang_output_section_phdr_list *phdrs,
4929 const char *lma_memspec)
4931 lang_memory_region_type *region;
4932 lang_memory_region_type *lma_region;
4933 struct overlay_list *l;
4934 lang_nocrossref_type *nocrossref;
4936 lang_get_regions (®ion, &lma_region,
4937 memspec, lma_memspec,
4938 lma_expr != NULL, FALSE);
4942 /* After setting the size of the last section, set '.' to end of the
4944 if (overlay_list != NULL)
4945 overlay_list->os->update_dot_tree
4946 = exp_assop ('=', ".", exp_binop ('+', overlay_vma, overlay_max));
4951 struct overlay_list *next;
4953 if (fill != NULL && l->os->fill == NULL)
4956 l->os->region = region;
4957 l->os->lma_region = lma_region;
4959 /* The first section has the load address specified in the
4960 OVERLAY statement. The rest are worked out from that.
4961 The base address is not needed (and should be null) if
4962 an LMA region was specified. */
4964 l->os->load_base = lma_expr;
4965 else if (lma_region == 0)
4966 l->os->load_base = exp_binop ('+',
4967 exp_nameop (LOADADDR, l->next->os->name),
4968 exp_nameop (SIZEOF, l->next->os->name));
4970 if (phdrs != NULL && l->os->phdrs == NULL)
4971 l->os->phdrs = phdrs;
4975 lang_nocrossref_type *nc;
4977 nc = xmalloc (sizeof *nc);
4978 nc->name = l->os->name;
4979 nc->next = nocrossref;
4988 if (nocrossref != NULL)
4989 lang_add_nocrossref (nocrossref);
4992 overlay_list = NULL;
4996 /* Version handling. This is only useful for ELF. */
4998 /* This global variable holds the version tree that we build. */
5000 struct bfd_elf_version_tree *lang_elf_version_info;
5002 /* If PREV is NULL, return first version pattern matching particular symbol.
5003 If PREV is non-NULL, return first version pattern matching particular
5004 symbol after PREV (previously returned by lang_vers_match). */
5006 static struct bfd_elf_version_expr *
5007 lang_vers_match (struct bfd_elf_version_expr_head *head,
5008 struct bfd_elf_version_expr *prev,
5011 const char *cxx_sym = sym;
5012 const char *java_sym = sym;
5013 struct bfd_elf_version_expr *expr = NULL;
5015 if (head->mask & BFD_ELF_VERSION_CXX_TYPE)
5017 cxx_sym = cplus_demangle (sym, DMGL_PARAMS | DMGL_ANSI);
5021 if (head->mask & BFD_ELF_VERSION_JAVA_TYPE)
5023 java_sym = cplus_demangle (sym, DMGL_JAVA);
5028 if (head->htab && (prev == NULL || prev->symbol))
5030 struct bfd_elf_version_expr e;
5032 switch (prev ? prev->mask : 0)
5035 if (head->mask & BFD_ELF_VERSION_C_TYPE)
5038 expr = htab_find (head->htab, &e);
5039 while (expr && strcmp (expr->symbol, sym) == 0)
5040 if (expr->mask == BFD_ELF_VERSION_C_TYPE)
5046 case BFD_ELF_VERSION_C_TYPE:
5047 if (head->mask & BFD_ELF_VERSION_CXX_TYPE)
5050 expr = htab_find (head->htab, &e);
5051 while (expr && strcmp (expr->symbol, cxx_sym) == 0)
5052 if (expr->mask == BFD_ELF_VERSION_CXX_TYPE)
5058 case BFD_ELF_VERSION_CXX_TYPE:
5059 if (head->mask & BFD_ELF_VERSION_JAVA_TYPE)
5061 e.symbol = java_sym;
5062 expr = htab_find (head->htab, &e);
5063 while (expr && strcmp (expr->symbol, java_sym) == 0)
5064 if (expr->mask == BFD_ELF_VERSION_JAVA_TYPE)
5075 /* Finally, try the wildcards. */
5076 if (prev == NULL || prev->symbol)
5077 expr = head->remaining;
5084 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
5087 if (expr->mask == BFD_ELF_VERSION_JAVA_TYPE)
5089 else if (expr->mask == BFD_ELF_VERSION_CXX_TYPE)
5093 if (fnmatch (expr->pattern, s, 0) == 0)
5100 free ((char *) cxx_sym);
5101 if (java_sym != sym)
5102 free ((char *) java_sym);
5106 /* Return NULL if the PATTERN argument is a glob pattern, otherwise,
5107 return a string pointing to the symbol name. */
5110 realsymbol (const char *pattern)
5113 bfd_boolean changed = FALSE, backslash = FALSE;
5114 char *s, *symbol = xmalloc (strlen (pattern) + 1);
5116 for (p = pattern, s = symbol; *p != '\0'; ++p)
5118 /* It is a glob pattern only if there is no preceding
5120 if (! backslash && (*p == '?' || *p == '*' || *p == '['))
5128 /* Remove the preceding backslash. */
5135 backslash = *p == '\\';
5150 /* This is called for each variable name or match expression. */
5152 struct bfd_elf_version_expr *
5153 lang_new_vers_pattern (struct bfd_elf_version_expr *orig,
5157 struct bfd_elf_version_expr *ret;
5159 ret = xmalloc (sizeof *ret);
5164 ret->symbol = realsymbol (new);
5166 if (lang == NULL || strcasecmp (lang, "C") == 0)
5167 ret->mask = BFD_ELF_VERSION_C_TYPE;
5168 else if (strcasecmp (lang, "C++") == 0)
5169 ret->mask = BFD_ELF_VERSION_CXX_TYPE;
5170 else if (strcasecmp (lang, "Java") == 0)
5171 ret->mask = BFD_ELF_VERSION_JAVA_TYPE;
5174 einfo (_("%X%P: unknown language `%s' in version information\n"),
5176 ret->mask = BFD_ELF_VERSION_C_TYPE;
5179 return ldemul_new_vers_pattern (ret);
5182 /* This is called for each set of variable names and match
5185 struct bfd_elf_version_tree *
5186 lang_new_vers_node (struct bfd_elf_version_expr *globals,
5187 struct bfd_elf_version_expr *locals)
5189 struct bfd_elf_version_tree *ret;
5191 ret = xcalloc (1, sizeof *ret);
5192 ret->globals.list = globals;
5193 ret->locals.list = locals;
5194 ret->match = lang_vers_match;
5195 ret->name_indx = (unsigned int) -1;
5199 /* This static variable keeps track of version indices. */
5201 static int version_index;
5204 version_expr_head_hash (const void *p)
5206 const struct bfd_elf_version_expr *e = p;
5208 return htab_hash_string (e->symbol);
5212 version_expr_head_eq (const void *p1, const void *p2)
5214 const struct bfd_elf_version_expr *e1 = p1;
5215 const struct bfd_elf_version_expr *e2 = p2;
5217 return strcmp (e1->symbol, e2->symbol) == 0;
5221 lang_finalize_version_expr_head (struct bfd_elf_version_expr_head *head)
5224 struct bfd_elf_version_expr *e, *next;
5225 struct bfd_elf_version_expr **list_loc, **remaining_loc;
5227 for (e = head->list; e; e = e->next)
5231 head->mask |= e->mask;
5236 head->htab = htab_create (count * 2, version_expr_head_hash,
5237 version_expr_head_eq, NULL);
5238 list_loc = &head->list;
5239 remaining_loc = &head->remaining;
5240 for (e = head->list; e; e = next)
5246 remaining_loc = &e->next;
5250 void **loc = htab_find_slot (head->htab, e, INSERT);
5254 struct bfd_elf_version_expr *e1, *last;
5260 if (e1->mask == e->mask)
5268 while (e1 && strcmp (e1->symbol, e->symbol) == 0);
5272 /* This is a duplicate. */
5273 /* FIXME: Memory leak. Sometimes pattern is not
5274 xmalloced alone, but in larger chunk of memory. */
5275 /* free (e->symbol); */
5280 e->next = last->next;
5288 list_loc = &e->next;
5292 *remaining_loc = NULL;
5293 *list_loc = head->remaining;
5296 head->remaining = head->list;
5299 /* This is called when we know the name and dependencies of the
5303 lang_register_vers_node (const char *name,
5304 struct bfd_elf_version_tree *version,
5305 struct bfd_elf_version_deps *deps)
5307 struct bfd_elf_version_tree *t, **pp;
5308 struct bfd_elf_version_expr *e1;
5313 if ((name[0] == '\0' && lang_elf_version_info != NULL)
5314 || (lang_elf_version_info && lang_elf_version_info->name[0] == '\0'))
5316 einfo (_("%X%P: anonymous version tag cannot be combined with other version tags\n"));
5321 /* Make sure this node has a unique name. */
5322 for (t = lang_elf_version_info; t != NULL; t = t->next)
5323 if (strcmp (t->name, name) == 0)
5324 einfo (_("%X%P: duplicate version tag `%s'\n"), name);
5326 lang_finalize_version_expr_head (&version->globals);
5327 lang_finalize_version_expr_head (&version->locals);
5329 /* Check the global and local match names, and make sure there
5330 aren't any duplicates. */
5332 for (e1 = version->globals.list; e1 != NULL; e1 = e1->next)
5334 for (t = lang_elf_version_info; t != NULL; t = t->next)
5336 struct bfd_elf_version_expr *e2;
5338 if (t->locals.htab && e1->symbol)
5340 e2 = htab_find (t->locals.htab, e1);
5341 while (e2 && strcmp (e1->symbol, e2->symbol) == 0)
5343 if (e1->mask == e2->mask)
5344 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5349 else if (!e1->symbol)
5350 for (e2 = t->locals.remaining; e2 != NULL; e2 = e2->next)
5351 if (strcmp (e1->pattern, e2->pattern) == 0 && e1->mask == e2->mask)
5352 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5357 for (e1 = version->locals.list; e1 != NULL; e1 = e1->next)
5359 for (t = lang_elf_version_info; t != NULL; t = t->next)
5361 struct bfd_elf_version_expr *e2;
5363 if (t->globals.htab && e1->symbol)
5365 e2 = htab_find (t->globals.htab, e1);
5366 while (e2 && strcmp (e1->symbol, e2->symbol) == 0)
5368 if (e1->mask == e2->mask)
5369 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5374 else if (!e1->symbol)
5375 for (e2 = t->globals.remaining; e2 != NULL; e2 = e2->next)
5376 if (strcmp (e1->pattern, e2->pattern) == 0 && e1->mask == e2->mask)
5377 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5382 version->deps = deps;
5383 version->name = name;
5384 if (name[0] != '\0')
5387 version->vernum = version_index;
5390 version->vernum = 0;
5392 for (pp = &lang_elf_version_info; *pp != NULL; pp = &(*pp)->next)
5397 /* This is called when we see a version dependency. */
5399 struct bfd_elf_version_deps *
5400 lang_add_vers_depend (struct bfd_elf_version_deps *list, const char *name)
5402 struct bfd_elf_version_deps *ret;
5403 struct bfd_elf_version_tree *t;
5405 ret = xmalloc (sizeof *ret);
5408 for (t = lang_elf_version_info; t != NULL; t = t->next)
5410 if (strcmp (t->name, name) == 0)
5412 ret->version_needed = t;
5417 einfo (_("%X%P: unable to find version dependency `%s'\n"), name);
5423 lang_do_version_exports_section (void)
5425 struct bfd_elf_version_expr *greg = NULL, *lreg;
5427 LANG_FOR_EACH_INPUT_STATEMENT (is)
5429 asection *sec = bfd_get_section_by_name (is->the_bfd, ".exports");
5436 len = bfd_section_size (is->the_bfd, sec);
5437 contents = xmalloc (len);
5438 if (!bfd_get_section_contents (is->the_bfd, sec, contents, 0, len))
5439 einfo (_("%X%P: unable to read .exports section contents\n"), sec);
5442 while (p < contents + len)
5444 greg = lang_new_vers_pattern (greg, p, NULL);
5445 p = strchr (p, '\0') + 1;
5448 /* Do not free the contents, as we used them creating the regex. */
5450 /* Do not include this section in the link. */
5451 bfd_set_section_flags (is->the_bfd, sec,
5452 bfd_get_section_flags (is->the_bfd, sec) | SEC_EXCLUDE);
5455 lreg = lang_new_vers_pattern (NULL, "*", NULL);
5456 lang_register_vers_node (command_line.version_exports_section,
5457 lang_new_vers_node (greg, lreg), NULL);
5461 lang_add_unique (const char *name)
5463 struct unique_sections *ent;
5465 for (ent = unique_section_list; ent; ent = ent->next)
5466 if (strcmp (ent->name, name) == 0)
5469 ent = xmalloc (sizeof *ent);
5470 ent->name = xstrdup (name);
5471 ent->next = unique_section_list;
5472 unique_section_list = ent;