1 /* Linker command language support.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005
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;
50 static struct obstack map_obstack;
52 #define obstack_chunk_alloc xmalloc
53 #define obstack_chunk_free free
54 static const char *startup_file;
55 static lang_statement_list_type input_file_chain;
56 static bfd_boolean placed_commons = FALSE;
57 static lang_output_section_statement_type *default_common_section;
58 static bfd_boolean map_option_f;
59 static bfd_vma print_dot;
60 static lang_input_statement_type *first_file;
61 static const char *current_target;
62 static const char *output_target;
63 static lang_statement_list_type statement_list;
64 static struct lang_phdr *lang_phdr_list;
65 static struct bfd_hash_table lang_definedness_table;
67 /* Forward declarations. */
68 static void exp_init_os (etree_type *);
69 static void init_map_userdata (bfd *, asection *, void *);
70 static lang_input_statement_type *lookup_name (const char *);
71 static bfd_boolean load_symbols (lang_input_statement_type *,
72 lang_statement_list_type *);
73 static struct bfd_hash_entry *lang_definedness_newfunc
74 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
75 static void insert_undefined (const char *);
76 static void print_all_symbols (asection *);
77 static bfd_boolean sort_def_symbol (struct bfd_link_hash_entry *, void *);
78 static void print_statement (lang_statement_union_type *,
79 lang_output_section_statement_type *);
80 static void print_statement_list (lang_statement_union_type *,
81 lang_output_section_statement_type *);
82 static void print_statements (void);
83 static bfd_boolean lang_one_common (struct bfd_link_hash_entry *, void *);
84 static void lang_record_phdrs (void);
85 static void lang_do_version_exports_section (void);
87 typedef void (*callback_t) (lang_wild_statement_type *, struct wildcard_list *,
88 asection *, lang_input_statement_type *, void *);
90 /* Exported variables. */
91 lang_output_section_statement_type *abs_output_section;
92 lang_statement_list_type lang_output_section_statement;
93 lang_statement_list_type *stat_ptr = &statement_list;
94 lang_statement_list_type file_chain = { NULL, NULL };
95 struct bfd_sym_chain entry_symbol = { NULL, NULL };
96 const char *entry_section = ".text";
97 bfd_boolean entry_from_cmdline;
98 bfd_boolean lang_has_input_file = FALSE;
99 bfd_boolean had_output_filename = FALSE;
100 bfd_boolean lang_float_flag = FALSE;
101 bfd_boolean delete_output_file_on_failure = FALSE;
102 struct lang_nocrossrefs *nocrossref_list;
103 struct unique_sections *unique_section_list;
104 static bfd_boolean ldlang_sysrooted_script = FALSE;
105 int lang_statement_iteration = 0;
107 etree_type *base; /* Relocation base - or null */
109 /* Return TRUE if the PATTERN argument is a wildcard pattern.
110 Although backslashes are treated specially if a pattern contains
111 wildcards, we do not consider the mere presence of a backslash to
112 be enough to cause the pattern to be treated as a wildcard.
113 That lets us handle DOS filenames more naturally. */
114 #define wildcardp(pattern) (strpbrk ((pattern), "?*[") != NULL)
116 #define new_stat(x, y) \
117 (x##_type *) new_statement (x##_enum, sizeof (x##_type), y)
119 #define outside_section_address(q) \
120 ((q)->output_offset + (q)->output_section->vma)
122 #define outside_symbol_address(q) \
123 ((q)->value + outside_section_address (q->section))
125 #define SECTION_NAME_MAP_LENGTH (16)
128 stat_alloc (size_t size)
130 return obstack_alloc (&stat_obstack, size);
134 unique_section_p (const asection *sec)
136 struct unique_sections *unam;
139 if (link_info.relocatable
140 && sec->owner != NULL
141 && bfd_is_group_section (sec->owner, sec))
145 for (unam = unique_section_list; unam; unam = unam->next)
146 if (wildcardp (unam->name)
147 ? fnmatch (unam->name, secnam, 0) == 0
148 : strcmp (unam->name, secnam) == 0)
156 /* Generic traversal routines for finding matching sections. */
159 walk_wild_section (lang_wild_statement_type *ptr,
160 lang_input_statement_type *file,
166 if (file->just_syms_flag)
169 for (s = file->the_bfd->sections; s != NULL; s = s->next)
171 struct wildcard_list *sec;
173 sec = ptr->section_list;
175 (*callback) (ptr, sec, s, file, data);
179 bfd_boolean skip = FALSE;
180 struct name_list *list_tmp;
182 /* Don't process sections from files which were
184 for (list_tmp = sec->spec.exclude_name_list;
186 list_tmp = list_tmp->next)
188 if (wildcardp (list_tmp->name))
189 skip = fnmatch (list_tmp->name, file->filename, 0) == 0;
191 skip = strcmp (list_tmp->name, file->filename) == 0;
193 /* If this file is part of an archive, and the archive is
194 excluded, exclude this file. */
195 if (! skip && file->the_bfd != NULL
196 && file->the_bfd->my_archive != NULL
197 && file->the_bfd->my_archive->filename != NULL)
199 if (wildcardp (list_tmp->name))
200 skip = fnmatch (list_tmp->name,
201 file->the_bfd->my_archive->filename,
204 skip = strcmp (list_tmp->name,
205 file->the_bfd->my_archive->filename) == 0;
212 if (!skip && sec->spec.name != NULL)
214 const char *sname = bfd_get_section_name (file->the_bfd, s);
216 if (wildcardp (sec->spec.name))
217 skip = fnmatch (sec->spec.name, sname, 0) != 0;
219 skip = strcmp (sec->spec.name, sname) != 0;
223 (*callback) (ptr, sec, s, file, data);
230 /* Handle a wild statement for a single file F. */
233 walk_wild_file (lang_wild_statement_type *s,
234 lang_input_statement_type *f,
238 if (f->the_bfd == NULL
239 || ! bfd_check_format (f->the_bfd, bfd_archive))
240 walk_wild_section (s, f, callback, data);
245 /* This is an archive file. We must map each member of the
246 archive separately. */
247 member = bfd_openr_next_archived_file (f->the_bfd, NULL);
248 while (member != NULL)
250 /* When lookup_name is called, it will call the add_symbols
251 entry point for the archive. For each element of the
252 archive which is included, BFD will call ldlang_add_file,
253 which will set the usrdata field of the member to the
254 lang_input_statement. */
255 if (member->usrdata != NULL)
257 walk_wild_section (s, member->usrdata, callback, data);
260 member = bfd_openr_next_archived_file (f->the_bfd, member);
266 walk_wild (lang_wild_statement_type *s, callback_t callback, void *data)
268 const char *file_spec = s->filename;
270 if (file_spec == NULL)
272 /* Perform the iteration over all files in the list. */
273 LANG_FOR_EACH_INPUT_STATEMENT (f)
275 walk_wild_file (s, f, callback, data);
278 else if (wildcardp (file_spec))
280 LANG_FOR_EACH_INPUT_STATEMENT (f)
282 if (fnmatch (file_spec, f->filename, FNM_FILE_NAME) == 0)
283 walk_wild_file (s, f, callback, data);
288 lang_input_statement_type *f;
290 /* Perform the iteration over a single file. */
291 f = lookup_name (file_spec);
293 walk_wild_file (s, f, callback, data);
297 /* lang_for_each_statement walks the parse tree and calls the provided
298 function for each node. */
301 lang_for_each_statement_worker (void (*func) (lang_statement_union_type *),
302 lang_statement_union_type *s)
304 for (; s != NULL; s = s->header.next)
308 switch (s->header.type)
310 case lang_constructors_statement_enum:
311 lang_for_each_statement_worker (func, constructor_list.head);
313 case lang_output_section_statement_enum:
314 lang_for_each_statement_worker
315 (func, s->output_section_statement.children.head);
317 case lang_wild_statement_enum:
318 lang_for_each_statement_worker (func,
319 s->wild_statement.children.head);
321 case lang_group_statement_enum:
322 lang_for_each_statement_worker (func,
323 s->group_statement.children.head);
325 case lang_data_statement_enum:
326 case lang_reloc_statement_enum:
327 case lang_object_symbols_statement_enum:
328 case lang_output_statement_enum:
329 case lang_target_statement_enum:
330 case lang_input_section_enum:
331 case lang_input_statement_enum:
332 case lang_assignment_statement_enum:
333 case lang_padding_statement_enum:
334 case lang_address_statement_enum:
335 case lang_fill_statement_enum:
345 lang_for_each_statement (void (*func) (lang_statement_union_type *))
347 lang_for_each_statement_worker (func, statement_list.head);
350 /*----------------------------------------------------------------------*/
353 lang_list_init (lang_statement_list_type *list)
356 list->tail = &list->head;
359 /* Build a new statement node for the parse tree. */
361 static lang_statement_union_type *
362 new_statement (enum statement_enum type,
364 lang_statement_list_type *list)
366 lang_statement_union_type *new;
368 new = stat_alloc (size);
369 new->header.type = type;
370 new->header.next = NULL;
371 lang_statement_append (list, new, &new->header.next);
375 /* Build a new input file node for the language. There are several
376 ways in which we treat an input file, eg, we only look at symbols,
377 or prefix it with a -l etc.
379 We can be supplied with requests for input files more than once;
380 they may, for example be split over several lines like foo.o(.text)
381 foo.o(.data) etc, so when asked for a file we check that we haven't
382 got it already so we don't duplicate the bfd. */
384 static lang_input_statement_type *
385 new_afile (const char *name,
386 lang_input_file_enum_type file_type,
388 bfd_boolean add_to_list)
390 lang_input_statement_type *p;
393 p = new_stat (lang_input_statement, stat_ptr);
396 p = stat_alloc (sizeof (lang_input_statement_type));
397 p->header.next = NULL;
400 lang_has_input_file = TRUE;
402 p->sysrooted = FALSE;
405 case lang_input_file_is_symbols_only_enum:
407 p->is_archive = FALSE;
409 p->local_sym_name = name;
410 p->just_syms_flag = TRUE;
411 p->search_dirs_flag = FALSE;
413 case lang_input_file_is_fake_enum:
415 p->is_archive = FALSE;
417 p->local_sym_name = name;
418 p->just_syms_flag = FALSE;
419 p->search_dirs_flag = FALSE;
421 case lang_input_file_is_l_enum:
422 p->is_archive = TRUE;
425 p->local_sym_name = concat ("-l", name, NULL);
426 p->just_syms_flag = FALSE;
427 p->search_dirs_flag = TRUE;
429 case lang_input_file_is_marker_enum:
431 p->is_archive = FALSE;
433 p->local_sym_name = name;
434 p->just_syms_flag = FALSE;
435 p->search_dirs_flag = TRUE;
437 case lang_input_file_is_search_file_enum:
438 p->sysrooted = ldlang_sysrooted_script;
440 p->is_archive = FALSE;
442 p->local_sym_name = name;
443 p->just_syms_flag = FALSE;
444 p->search_dirs_flag = TRUE;
446 case lang_input_file_is_file_enum:
448 p->is_archive = FALSE;
450 p->local_sym_name = name;
451 p->just_syms_flag = FALSE;
452 p->search_dirs_flag = FALSE;
459 p->next_real_file = NULL;
462 p->dynamic = config.dynamic_link;
463 p->add_needed = add_needed;
464 p->as_needed = as_needed;
465 p->whole_archive = whole_archive;
467 lang_statement_append (&input_file_chain,
468 (lang_statement_union_type *) p,
473 lang_input_statement_type *
474 lang_add_input_file (const char *name,
475 lang_input_file_enum_type file_type,
478 lang_has_input_file = TRUE;
479 return new_afile (name, file_type, target, TRUE);
482 /* Build enough state so that the parser can build its tree. */
487 obstack_begin (&stat_obstack, 1000);
489 stat_ptr = &statement_list;
491 lang_list_init (stat_ptr);
493 lang_list_init (&input_file_chain);
494 lang_list_init (&lang_output_section_statement);
495 lang_list_init (&file_chain);
496 first_file = lang_add_input_file (NULL, lang_input_file_is_marker_enum,
499 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME);
501 abs_output_section->bfd_section = bfd_abs_section_ptr;
503 /* The value "3" is ad-hoc, somewhat related to the expected number of
504 DEFINED expressions in a linker script. For most default linker
505 scripts, there are none. Why a hash table then? Well, it's somewhat
506 simpler to re-use working machinery than using a linked list in terms
507 of code-complexity here in ld, besides the initialization which just
508 looks like other code here. */
509 if (!bfd_hash_table_init_n (&lang_definedness_table,
510 lang_definedness_newfunc, 3))
511 einfo (_("%P%F: out of memory during initialization"));
513 /* Callers of exp_fold_tree need to increment this. */
514 lang_statement_iteration = 0;
517 /*----------------------------------------------------------------------
518 A region is an area of memory declared with the
519 MEMORY { name:org=exp, len=exp ... }
522 We maintain a list of all the regions here.
524 If no regions are specified in the script, then the default is used
525 which is created when looked up to be the entire data space.
527 If create is true we are creating a region inside a MEMORY block.
528 In this case it is probably an error to create a region that has
529 already been created. If we are not inside a MEMORY block it is
530 dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION)
531 and so we issue a warning. */
533 static lang_memory_region_type *lang_memory_region_list;
534 static lang_memory_region_type **lang_memory_region_list_tail
535 = &lang_memory_region_list;
537 lang_memory_region_type *
538 lang_memory_region_lookup (const char *const name, bfd_boolean create)
540 lang_memory_region_type *p;
541 lang_memory_region_type *new;
543 /* NAME is NULL for LMA memspecs if no region was specified. */
547 for (p = lang_memory_region_list; p != NULL; p = p->next)
548 if (strcmp (p->name, name) == 0)
551 einfo (_("%P:%S: warning: redeclaration of memory region '%s'\n"),
556 if (!create && strcmp (name, DEFAULT_MEMORY_REGION))
557 einfo (_("%P:%S: warning: memory region %s not declared\n"), name);
559 new = stat_alloc (sizeof (lang_memory_region_type));
561 new->name = xstrdup (name);
564 *lang_memory_region_list_tail = new;
565 lang_memory_region_list_tail = &new->next;
569 new->length = ~(bfd_size_type) 0;
571 new->had_full_message = FALSE;
576 static lang_memory_region_type *
577 lang_memory_default (asection *section)
579 lang_memory_region_type *p;
581 flagword sec_flags = section->flags;
583 /* Override SEC_DATA to mean a writable section. */
584 if ((sec_flags & (SEC_ALLOC | SEC_READONLY | SEC_CODE)) == SEC_ALLOC)
585 sec_flags |= SEC_DATA;
587 for (p = lang_memory_region_list; p != NULL; p = p->next)
589 if ((p->flags & sec_flags) != 0
590 && (p->not_flags & sec_flags) == 0)
595 return lang_memory_region_lookup (DEFAULT_MEMORY_REGION, FALSE);
598 static lang_output_section_statement_type *
599 lang_output_section_find_1 (const char *const name, int constraint)
601 lang_output_section_statement_type *lookup;
603 for (lookup = &lang_output_section_statement.head->output_section_statement;
605 lookup = lookup->next)
607 if (strcmp (name, lookup->name) == 0
608 && lookup->constraint != -1
609 && (constraint == 0 || constraint == lookup->constraint))
615 lang_output_section_statement_type *
616 lang_output_section_find (const char *const name)
618 return lang_output_section_find_1 (name, 0);
621 static lang_output_section_statement_type *
622 lang_output_section_statement_lookup_1 (const char *const name, int constraint)
624 lang_output_section_statement_type *lookup;
626 lookup = lang_output_section_find_1 (name, constraint);
629 lookup = new_stat (lang_output_section_statement, stat_ptr);
630 lookup->region = NULL;
631 lookup->lma_region = NULL;
633 lookup->block_value = 1;
637 lookup->bfd_section = NULL;
638 lookup->processed = 0;
639 lookup->constraint = constraint;
640 lookup->sectype = normal_section;
641 lookup->addr_tree = NULL;
642 lang_list_init (&lookup->children);
644 lookup->memspec = NULL;
646 lookup->subsection_alignment = -1;
647 lookup->section_alignment = -1;
648 lookup->load_base = NULL;
649 lookup->update_dot_tree = NULL;
650 lookup->phdrs = NULL;
652 lang_statement_append (&lang_output_section_statement,
653 (lang_statement_union_type *) lookup,
654 (lang_statement_union_type **) &lookup->next);
659 lang_output_section_statement_type *
660 lang_output_section_statement_lookup (const char *const name)
662 return lang_output_section_statement_lookup_1 (name, 0);
665 /* A variant of lang_output_section_find used by place_orphan.
666 Returns the output statement that should precede a new output
667 statement for SEC. If an exact match is found on certain flags,
670 lang_output_section_statement_type *
671 lang_output_section_find_by_flags (const asection *sec,
672 lang_output_section_statement_type **exact)
674 lang_output_section_statement_type *first, *look, *found;
677 /* We know the first statement on this list is *ABS*. May as well
679 first = &lang_output_section_statement.head->output_section_statement;
682 /* First try for an exact match. */
684 for (look = first; look; look = look->next)
687 if (look->bfd_section != NULL)
688 flags = look->bfd_section->flags;
690 if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY
691 | SEC_CODE | SEC_SMALL_DATA | SEC_THREAD_LOCAL)))
700 if (sec->flags & SEC_CODE)
702 /* Try for a rw code section. */
703 for (look = first; look; look = look->next)
706 if (look->bfd_section != NULL)
707 flags = look->bfd_section->flags;
709 if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
710 | SEC_CODE | SEC_SMALL_DATA | SEC_THREAD_LOCAL)))
716 if (sec->flags & (SEC_READONLY | SEC_THREAD_LOCAL))
718 /* .rodata can go after .text, .sdata2 after .rodata. */
719 for (look = first; look; look = look->next)
722 if (look->bfd_section != NULL)
723 flags = look->bfd_section->flags;
725 if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
727 && !(look->flags & (SEC_SMALL_DATA | SEC_THREAD_LOCAL)))
733 if (sec->flags & SEC_SMALL_DATA)
735 /* .sdata goes after .data, .sbss after .sdata. */
736 for (look = first; look; look = look->next)
739 if (look->bfd_section != NULL)
740 flags = look->bfd_section->flags;
742 if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
744 || ((look->flags & SEC_SMALL_DATA)
745 && !(sec->flags & SEC_HAS_CONTENTS)))
751 if (sec->flags & SEC_HAS_CONTENTS)
753 /* .data goes after .rodata. */
754 for (look = first; look; look = look->next)
757 if (look->bfd_section != NULL)
758 flags = look->bfd_section->flags;
760 if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
761 | SEC_SMALL_DATA | SEC_THREAD_LOCAL)))
767 /* .bss goes last. */
768 for (look = first; look; look = look->next)
771 if (look->bfd_section != NULL)
772 flags = look->bfd_section->flags;
774 if (!(flags & SEC_ALLOC))
781 /* Find the last output section before given output statement.
782 Used by place_orphan. */
785 output_prev_sec_find (lang_output_section_statement_type *os)
787 asection *s = (asection *) NULL;
788 lang_output_section_statement_type *lookup;
790 for (lookup = &lang_output_section_statement.head->output_section_statement;
792 lookup = lookup->next)
794 if (lookup->constraint == -1)
799 if (lookup->bfd_section != NULL && lookup->bfd_section->owner != NULL)
800 s = lookup->bfd_section;
806 lang_output_section_statement_type *
807 lang_insert_orphan (lang_input_statement_type *file,
810 lang_output_section_statement_type *after,
811 struct orphan_save *place,
813 lang_statement_list_type *add_child)
815 lang_statement_list_type *old;
816 lang_statement_list_type add;
818 etree_type *load_base;
819 lang_output_section_statement_type *os;
820 lang_output_section_statement_type **os_tail;
822 /* Start building a list of statements for this section.
823 First save the current statement pointer. */
826 /* If we have found an appropriate place for the output section
827 statements for this orphan, add them to our own private list,
828 inserting them later into the global statement list. */
832 lang_list_init (stat_ptr);
836 if (config.build_constructors)
838 /* If the name of the section is representable in C, then create
839 symbols to mark the start and the end of the section. */
840 for (ps = secname; *ps != '\0'; ps++)
841 if (! ISALNUM ((unsigned char) *ps) && *ps != '_')
848 symname = (char *) xmalloc (ps - secname + sizeof "__start_" + 1);
849 symname[0] = bfd_get_symbol_leading_char (output_bfd);
850 sprintf (symname + (symname[0] != 0), "__start_%s", secname);
851 e_align = exp_unop (ALIGN_K,
852 exp_intop ((bfd_vma) 1 << s->alignment_power));
853 lang_add_assignment (exp_assop ('=', ".", e_align));
854 lang_add_assignment (exp_assop ('=', symname,
855 exp_nameop (NAME, ".")));
859 if (link_info.relocatable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)
860 address = exp_intop (0);
863 if (after != NULL && after->load_base != NULL)
865 etree_type *lma_from_vma;
866 lma_from_vma = exp_binop ('-', after->load_base,
867 exp_nameop (ADDR, after->name));
868 load_base = exp_binop ('+', lma_from_vma,
869 exp_nameop (ADDR, secname));
872 os_tail = ((lang_output_section_statement_type **)
873 lang_output_section_statement.tail);
874 os = lang_enter_output_section_statement (secname, address, 0, NULL, NULL,
877 if (add_child == NULL)
878 add_child = &os->children;
879 lang_add_section (add_child, s, os, file);
881 lang_leave_output_section_statement (0, "*default*", NULL, NULL);
883 if (config.build_constructors && *ps == '\0')
887 /* lang_leave_ouput_section_statement resets stat_ptr.
888 Put stat_ptr back where we want it. */
892 symname = (char *) xmalloc (ps - secname + sizeof "__stop_" + 1);
893 symname[0] = bfd_get_symbol_leading_char (output_bfd);
894 sprintf (symname + (symname[0] != 0), "__stop_%s", secname);
895 lang_add_assignment (exp_assop ('=', symname,
896 exp_nameop (NAME, ".")));
899 /* Restore the global list pointer. */
903 if (after != NULL && os->bfd_section != NULL)
905 asection *snew, **pps;
907 snew = os->bfd_section;
909 /* Shuffle the bfd section list to make the output file look
910 neater. This is really only cosmetic. */
911 if (place->section == NULL
912 && after != (&lang_output_section_statement.head
913 ->output_section_statement))
915 asection *bfd_section = after->bfd_section;
917 /* If the output statement hasn't been used to place any input
918 sections (and thus doesn't have an output bfd_section),
919 look for the closest prior output statement having an
921 if (bfd_section == NULL)
922 bfd_section = output_prev_sec_find (after);
924 if (bfd_section != NULL && bfd_section != snew)
925 place->section = &bfd_section->next;
928 if (place->section == NULL)
929 place->section = &output_bfd->sections;
931 /* Unlink the section. */
932 for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
934 bfd_section_list_remove (output_bfd, pps);
936 /* Now tack it back on in the right place. */
937 bfd_section_list_insert (output_bfd, place->section, snew);
939 /* Save the end of this list. Further ophans of this type will
940 follow the one we've just added. */
941 place->section = &snew->next;
943 /* The following is non-cosmetic. We try to put the output
944 statements in some sort of reasonable order here, because they
945 determine the final load addresses of the orphan sections.
946 In addition, placing output statements in the wrong order may
947 require extra segments. For instance, given a typical
948 situation of all read-only sections placed in one segment and
949 following that a segment containing all the read-write
950 sections, we wouldn't want to place an orphan read/write
951 section before or amongst the read-only ones. */
952 if (add.head != NULL)
954 lang_output_section_statement_type *newly_added_os;
956 if (place->stmt == NULL)
958 lang_statement_union_type **where;
959 lang_statement_union_type **assign = NULL;
961 /* Look for a suitable place for the new statement list.
962 The idea is to skip over anything that might be inside
963 a SECTIONS {} statement in a script, before we find
964 another output_section_statement. Assignments to "dot"
965 before an output section statement are assumed to
967 for (where = &after->header.next;
969 where = &(*where)->header.next)
971 switch ((*where)->header.type)
973 case lang_assignment_statement_enum:
976 lang_assignment_statement_type *ass;
977 ass = &(*where)->assignment_statement;
978 if (ass->exp->type.node_class != etree_assert
979 && ass->exp->assign.dst[0] == '.'
980 && ass->exp->assign.dst[1] == 0)
984 case lang_wild_statement_enum:
985 case lang_input_section_enum:
986 case lang_object_symbols_statement_enum:
987 case lang_fill_statement_enum:
988 case lang_data_statement_enum:
989 case lang_reloc_statement_enum:
990 case lang_padding_statement_enum:
991 case lang_constructors_statement_enum:
994 case lang_output_section_statement_enum:
997 case lang_input_statement_enum:
998 case lang_address_statement_enum:
999 case lang_target_statement_enum:
1000 case lang_output_statement_enum:
1001 case lang_group_statement_enum:
1002 case lang_afile_asection_pair_statement_enum:
1011 place->os_tail = &after->next;
1015 /* Put it after the last orphan statement we added. */
1016 *add.tail = *place->stmt;
1017 *place->stmt = add.head;
1020 /* Fix the global list pointer if we happened to tack our
1021 new list at the tail. */
1022 if (*old->tail == add.head)
1023 old->tail = add.tail;
1025 /* Save the end of this list. */
1026 place->stmt = add.tail;
1028 /* Do the same for the list of output section statements. */
1029 newly_added_os = *os_tail;
1031 newly_added_os->next = *place->os_tail;
1032 *place->os_tail = newly_added_os;
1033 place->os_tail = &newly_added_os->next;
1035 /* Fixing the global list pointer here is a little different.
1036 We added to the list in lang_enter_output_section_statement,
1037 trimmed off the new output_section_statment above when
1038 assigning *os_tail = NULL, but possibly added it back in
1039 the same place when assigning *place->os_tail. */
1040 if (*os_tail == NULL)
1041 lang_output_section_statement.tail
1042 = (lang_statement_union_type **) os_tail;
1049 lang_map_flags (flagword flag)
1051 if (flag & SEC_ALLOC)
1054 if (flag & SEC_CODE)
1057 if (flag & SEC_READONLY)
1060 if (flag & SEC_DATA)
1063 if (flag & SEC_LOAD)
1070 lang_memory_region_type *m;
1073 minfo (_("\nMemory Configuration\n\n"));
1074 fprintf (config.map_file, "%-16s %-18s %-18s %s\n",
1075 _("Name"), _("Origin"), _("Length"), _("Attributes"));
1077 for (m = lang_memory_region_list; m != NULL; m = m->next)
1082 fprintf (config.map_file, "%-16s ", m->name);
1084 sprintf_vma (buf, m->origin);
1085 minfo ("0x%s ", buf);
1093 minfo ("0x%V", m->length);
1094 if (m->flags || m->not_flags)
1102 lang_map_flags (m->flags);
1108 lang_map_flags (m->not_flags);
1115 fprintf (config.map_file, _("\nLinker script and memory map\n\n"));
1117 if (! command_line.reduce_memory_overheads)
1119 obstack_begin (&map_obstack, 1000);
1120 for (p = link_info.input_bfds; p != (bfd *) NULL; p = p->link_next)
1121 bfd_map_over_sections (p, init_map_userdata, 0);
1122 bfd_link_hash_traverse (link_info.hash, sort_def_symbol, 0);
1124 print_statements ();
1128 init_map_userdata (abfd, sec, data)
1129 bfd *abfd ATTRIBUTE_UNUSED;
1131 void *data ATTRIBUTE_UNUSED;
1133 fat_section_userdata_type *new_data
1134 = ((fat_section_userdata_type *) (stat_alloc
1135 (sizeof (fat_section_userdata_type))));
1137 ASSERT (get_userdata (sec) == NULL);
1138 get_userdata (sec) = new_data;
1139 new_data->map_symbol_def_tail = &new_data->map_symbol_def_head;
1143 sort_def_symbol (hash_entry, info)
1144 struct bfd_link_hash_entry *hash_entry;
1145 void *info ATTRIBUTE_UNUSED;
1147 if (hash_entry->type == bfd_link_hash_defined
1148 || hash_entry->type == bfd_link_hash_defweak)
1150 struct fat_user_section_struct *ud;
1151 struct map_symbol_def *def;
1153 ud = get_userdata (hash_entry->u.def.section);
1156 /* ??? What do we have to do to initialize this beforehand? */
1157 /* The first time we get here is bfd_abs_section... */
1158 init_map_userdata (0, hash_entry->u.def.section, 0);
1159 ud = get_userdata (hash_entry->u.def.section);
1161 else if (!ud->map_symbol_def_tail)
1162 ud->map_symbol_def_tail = &ud->map_symbol_def_head;
1164 def = obstack_alloc (&map_obstack, sizeof *def);
1165 def->entry = hash_entry;
1166 *(ud->map_symbol_def_tail) = def;
1167 ud->map_symbol_def_tail = &def->next;
1172 /* Initialize an output section. */
1175 init_os (lang_output_section_statement_type *s)
1177 lean_section_userdata_type *new;
1179 if (s->bfd_section != NULL)
1182 if (strcmp (s->name, DISCARD_SECTION_NAME) == 0)
1183 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME);
1185 new = stat_alloc (SECTION_USERDATA_SIZE);
1186 memset (new, 0, SECTION_USERDATA_SIZE);
1188 s->bfd_section = bfd_get_section_by_name (output_bfd, s->name);
1189 if (s->bfd_section == NULL)
1190 s->bfd_section = bfd_make_section (output_bfd, s->name);
1191 if (s->bfd_section == NULL)
1193 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
1194 output_bfd->xvec->name, s->name);
1196 s->bfd_section->output_section = s->bfd_section;
1198 /* We initialize an output sections output offset to minus its own
1199 vma to allow us to output a section through itself. */
1200 s->bfd_section->output_offset = 0;
1201 get_userdata (s->bfd_section) = new;
1203 /* If there is a base address, make sure that any sections it might
1204 mention are initialized. */
1205 if (s->addr_tree != NULL)
1206 exp_init_os (s->addr_tree);
1208 if (s->load_base != NULL)
1209 exp_init_os (s->load_base);
1212 /* Make sure that all output sections mentioned in an expression are
1216 exp_init_os (etree_type *exp)
1218 switch (exp->type.node_class)
1221 exp_init_os (exp->assign.src);
1225 exp_init_os (exp->binary.lhs);
1226 exp_init_os (exp->binary.rhs);
1230 exp_init_os (exp->trinary.cond);
1231 exp_init_os (exp->trinary.lhs);
1232 exp_init_os (exp->trinary.rhs);
1236 exp_init_os (exp->assert_s.child);
1240 exp_init_os (exp->unary.child);
1244 switch (exp->type.node_code)
1250 lang_output_section_statement_type *os;
1252 os = lang_output_section_find (exp->name.name);
1253 if (os != NULL && os->bfd_section == NULL)
1265 section_already_linked (bfd *abfd, asection *sec, void *data)
1267 lang_input_statement_type *entry = data;
1269 /* If we are only reading symbols from this object, then we want to
1270 discard all sections. */
1271 if (entry->just_syms_flag)
1273 bfd_link_just_syms (abfd, sec, &link_info);
1277 bfd_section_already_linked (abfd, sec);
1280 /* The wild routines.
1282 These expand statements like *(.text) and foo.o to a list of
1283 explicit actions, like foo.o(.text), bar.o(.text) and
1284 foo.o(.text, .data). */
1286 /* Add SECTION to the output section OUTPUT. Do this by creating a
1287 lang_input_section statement which is placed at PTR. FILE is the
1288 input file which holds SECTION. */
1291 lang_add_section (lang_statement_list_type *ptr,
1293 lang_output_section_statement_type *output,
1294 lang_input_statement_type *file)
1296 flagword flags = section->flags;
1297 bfd_boolean discard;
1299 /* Discard sections marked with SEC_EXCLUDE. */
1300 discard = (flags & SEC_EXCLUDE) != 0;
1302 /* Discard input sections which are assigned to a section named
1303 DISCARD_SECTION_NAME. */
1304 if (strcmp (output->name, DISCARD_SECTION_NAME) == 0)
1307 /* Discard debugging sections if we are stripping debugging
1309 if ((link_info.strip == strip_debugger || link_info.strip == strip_all)
1310 && (flags & SEC_DEBUGGING) != 0)
1315 if (section->output_section == NULL)
1317 /* This prevents future calls from assigning this section. */
1318 section->output_section = bfd_abs_section_ptr;
1323 if (section->output_section == NULL)
1326 lang_input_section_type *new;
1329 if (output->bfd_section == NULL)
1332 first = ! output->bfd_section->linker_has_input;
1333 output->bfd_section->linker_has_input = 1;
1335 /* Add a section reference to the list. */
1336 new = new_stat (lang_input_section, ptr);
1338 new->section = section;
1340 section->output_section = output->bfd_section;
1342 flags = section->flags;
1344 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1345 to an output section, because we want to be able to include a
1346 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1347 section (I don't know why we want to do this, but we do).
1348 build_link_order in ldwrite.c handles this case by turning
1349 the embedded SEC_NEVER_LOAD section into a fill. */
1351 flags &= ~ SEC_NEVER_LOAD;
1353 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1354 already been processed. One reason to do this is that on pe
1355 format targets, .text$foo sections go into .text and it's odd
1356 to see .text with SEC_LINK_ONCE set. */
1358 if (! link_info.relocatable)
1359 flags &= ~ (SEC_LINK_ONCE | SEC_LINK_DUPLICATES);
1361 /* If this is not the first input section, and the SEC_READONLY
1362 flag is not currently set, then don't set it just because the
1363 input section has it set. */
1365 if (! first && (output->bfd_section->flags & SEC_READONLY) == 0)
1366 flags &= ~ SEC_READONLY;
1368 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1370 && ((output->bfd_section->flags & (SEC_MERGE | SEC_STRINGS))
1371 != (flags & (SEC_MERGE | SEC_STRINGS))
1372 || ((flags & SEC_MERGE)
1373 && output->bfd_section->entsize != section->entsize)))
1375 output->bfd_section->flags &= ~ (SEC_MERGE | SEC_STRINGS);
1376 flags &= ~ (SEC_MERGE | SEC_STRINGS);
1379 output->bfd_section->flags |= flags;
1381 if (flags & SEC_MERGE)
1382 output->bfd_section->entsize = section->entsize;
1384 /* If SEC_READONLY is not set in the input section, then clear
1385 it from the output section. */
1386 if ((section->flags & SEC_READONLY) == 0)
1387 output->bfd_section->flags &= ~SEC_READONLY;
1389 switch (output->sectype)
1391 case normal_section:
1396 case overlay_section:
1397 output->bfd_section->flags &= ~SEC_ALLOC;
1399 case noload_section:
1400 output->bfd_section->flags &= ~SEC_LOAD;
1401 output->bfd_section->flags |= SEC_NEVER_LOAD;
1405 /* Copy over SEC_SMALL_DATA. */
1406 if (section->flags & SEC_SMALL_DATA)
1407 output->bfd_section->flags |= SEC_SMALL_DATA;
1409 if (section->alignment_power > output->bfd_section->alignment_power)
1410 output->bfd_section->alignment_power = section->alignment_power;
1412 /* If supplied an alignment, then force it. */
1413 if (output->section_alignment != -1)
1414 output->bfd_section->alignment_power = output->section_alignment;
1416 if (section->flags & SEC_BLOCK)
1418 output->bfd_section->flags |= SEC_BLOCK;
1419 /* FIXME: This value should really be obtained from the bfd... */
1420 output->block_value = 128;
1425 /* Compare sections ASEC and BSEC according to SORT. */
1428 compare_section (sort_type sort, asection *asec, asection *bsec)
1437 case by_alignment_name:
1438 ret = (bfd_section_alignment (bsec->owner, bsec)
1439 - bfd_section_alignment (asec->owner, asec));
1445 ret = strcmp (bfd_get_section_name (asec->owner, asec),
1446 bfd_get_section_name (bsec->owner, bsec));
1449 case by_name_alignment:
1450 ret = strcmp (bfd_get_section_name (asec->owner, asec),
1451 bfd_get_section_name (bsec->owner, bsec));
1457 ret = (bfd_section_alignment (bsec->owner, bsec)
1458 - bfd_section_alignment (asec->owner, asec));
1465 /* Handle wildcard sorting. This returns the lang_input_section which
1466 should follow the one we are going to create for SECTION and FILE,
1467 based on the sorting requirements of WILD. It returns NULL if the
1468 new section should just go at the end of the current list. */
1470 static lang_statement_union_type *
1471 wild_sort (lang_wild_statement_type *wild,
1472 struct wildcard_list *sec,
1473 lang_input_statement_type *file,
1476 const char *section_name;
1477 lang_statement_union_type *l;
1479 if (!wild->filenames_sorted
1480 && (sec == NULL || sec->spec.sorted == none))
1483 section_name = bfd_get_section_name (file->the_bfd, section);
1484 for (l = wild->children.head; l != NULL; l = l->header.next)
1486 lang_input_section_type *ls;
1488 if (l->header.type != lang_input_section_enum)
1490 ls = &l->input_section;
1492 /* Sorting by filename takes precedence over sorting by section
1495 if (wild->filenames_sorted)
1497 const char *fn, *ln;
1501 /* The PE support for the .idata section as generated by
1502 dlltool assumes that files will be sorted by the name of
1503 the archive and then the name of the file within the
1506 if (file->the_bfd != NULL
1507 && bfd_my_archive (file->the_bfd) != NULL)
1509 fn = bfd_get_filename (bfd_my_archive (file->the_bfd));
1514 fn = file->filename;
1518 if (ls->ifile->the_bfd != NULL
1519 && bfd_my_archive (ls->ifile->the_bfd) != NULL)
1521 ln = bfd_get_filename (bfd_my_archive (ls->ifile->the_bfd));
1526 ln = ls->ifile->filename;
1530 i = strcmp (fn, ln);
1539 fn = file->filename;
1541 ln = ls->ifile->filename;
1543 i = strcmp (fn, ln);
1551 /* Here either the files are not sorted by name, or we are
1552 looking at the sections for this file. */
1554 if (sec != NULL && sec->spec.sorted != none)
1556 if (compare_section (sec->spec.sorted, section,
1565 /* Expand a wild statement for a particular FILE. SECTION may be
1566 NULL, in which case it is a wild card. */
1569 output_section_callback (lang_wild_statement_type *ptr,
1570 struct wildcard_list *sec,
1572 lang_input_statement_type *file,
1575 lang_statement_union_type *before;
1577 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1578 if (unique_section_p (section))
1581 before = wild_sort (ptr, sec, file, section);
1583 /* Here BEFORE points to the lang_input_section which
1584 should follow the one we are about to add. If BEFORE
1585 is NULL, then the section should just go at the end
1586 of the current list. */
1589 lang_add_section (&ptr->children, section,
1590 (lang_output_section_statement_type *) output,
1594 lang_statement_list_type list;
1595 lang_statement_union_type **pp;
1597 lang_list_init (&list);
1598 lang_add_section (&list, section,
1599 (lang_output_section_statement_type *) output,
1602 /* If we are discarding the section, LIST.HEAD will
1604 if (list.head != NULL)
1606 ASSERT (list.head->header.next == NULL);
1608 for (pp = &ptr->children.head;
1610 pp = &(*pp)->header.next)
1611 ASSERT (*pp != NULL);
1613 list.head->header.next = *pp;
1619 /* Check if all sections in a wild statement for a particular FILE
1623 check_section_callback (lang_wild_statement_type *ptr ATTRIBUTE_UNUSED,
1624 struct wildcard_list *sec ATTRIBUTE_UNUSED,
1626 lang_input_statement_type *file ATTRIBUTE_UNUSED,
1629 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1630 if (unique_section_p (section))
1633 if (section->output_section == NULL && (section->flags & SEC_READONLY) == 0)
1634 ((lang_output_section_statement_type *) data)->all_input_readonly = FALSE;
1637 /* This is passed a file name which must have been seen already and
1638 added to the statement tree. We will see if it has been opened
1639 already and had its symbols read. If not then we'll read it. */
1641 static lang_input_statement_type *
1642 lookup_name (const char *name)
1644 lang_input_statement_type *search;
1646 for (search = (lang_input_statement_type *) input_file_chain.head;
1648 search = (lang_input_statement_type *) search->next_real_file)
1650 /* Use the local_sym_name as the name of the file that has
1651 already been loaded as filename might have been transformed
1652 via the search directory lookup mechanism. */
1653 const char * filename = search->local_sym_name;
1655 if (filename == NULL && name == NULL)
1657 if (filename != NULL
1659 && strcmp (filename, name) == 0)
1664 search = new_afile (name, lang_input_file_is_search_file_enum,
1665 default_target, FALSE);
1667 /* If we have already added this file, or this file is not real
1668 (FIXME: can that ever actually happen?) or the name is NULL
1669 (FIXME: can that ever actually happen?) don't add this file. */
1672 || search->filename == NULL)
1675 if (! load_symbols (search, NULL))
1681 /* Save LIST as a list of libraries whose symbols should not be exported. */
1686 struct excluded_lib *next;
1688 static struct excluded_lib *excluded_libs;
1691 add_excluded_libs (const char *list)
1693 const char *p = list, *end;
1697 struct excluded_lib *entry;
1698 end = strpbrk (p, ",:");
1700 end = p + strlen (p);
1701 entry = xmalloc (sizeof (*entry));
1702 entry->next = excluded_libs;
1703 entry->name = xmalloc (end - p + 1);
1704 memcpy (entry->name, p, end - p);
1705 entry->name[end - p] = '\0';
1706 excluded_libs = entry;
1714 check_excluded_libs (bfd *abfd)
1716 struct excluded_lib *lib = excluded_libs;
1720 int len = strlen (lib->name);
1721 const char *filename = lbasename (abfd->filename);
1723 if (strcmp (lib->name, "ALL") == 0)
1725 abfd->no_export = TRUE;
1729 if (strncmp (lib->name, filename, len) == 0
1730 && (filename[len] == '\0'
1731 || (filename[len] == '.' && filename[len + 1] == 'a'
1732 && filename[len + 2] == '\0')))
1734 abfd->no_export = TRUE;
1742 /* Get the symbols for an input file. */
1745 load_symbols (lang_input_statement_type *entry,
1746 lang_statement_list_type *place)
1753 ldfile_open_file (entry);
1755 if (! bfd_check_format (entry->the_bfd, bfd_archive)
1756 && ! bfd_check_format_matches (entry->the_bfd, bfd_object, &matching))
1759 lang_statement_list_type *hold;
1760 bfd_boolean bad_load = TRUE;
1761 bfd_boolean save_ldlang_sysrooted_script;
1763 err = bfd_get_error ();
1765 /* See if the emulation has some special knowledge. */
1766 if (ldemul_unrecognized_file (entry))
1769 if (err == bfd_error_file_ambiguously_recognized)
1773 einfo (_("%B: file not recognized: %E\n"), entry->the_bfd);
1774 einfo (_("%B: matching formats:"), entry->the_bfd);
1775 for (p = matching; *p != NULL; p++)
1779 else if (err != bfd_error_file_not_recognized
1781 einfo (_("%F%B: file not recognized: %E\n"), entry->the_bfd);
1785 bfd_close (entry->the_bfd);
1786 entry->the_bfd = NULL;
1788 /* Try to interpret the file as a linker script. */
1789 ldfile_open_command_file (entry->filename);
1793 save_ldlang_sysrooted_script = ldlang_sysrooted_script;
1794 ldlang_sysrooted_script = entry->sysrooted;
1796 ldfile_assumed_script = TRUE;
1797 parser_input = input_script;
1798 /* We want to use the same -Bdynamic/-Bstatic as the one for
1800 config.dynamic_link = entry->dynamic;
1802 ldfile_assumed_script = FALSE;
1804 ldlang_sysrooted_script = save_ldlang_sysrooted_script;
1810 if (ldemul_recognized_file (entry))
1813 /* We don't call ldlang_add_file for an archive. Instead, the
1814 add_symbols entry point will call ldlang_add_file, via the
1815 add_archive_element callback, for each element of the archive
1817 switch (bfd_get_format (entry->the_bfd))
1823 ldlang_add_file (entry);
1824 if (trace_files || trace_file_tries)
1825 info_msg ("%I\n", entry);
1829 check_excluded_libs (entry->the_bfd);
1831 if (entry->whole_archive)
1834 bfd_boolean loaded = TRUE;
1838 member = bfd_openr_next_archived_file (entry->the_bfd, member);
1843 if (! bfd_check_format (member, bfd_object))
1845 einfo (_("%F%B: member %B in archive is not an object\n"),
1846 entry->the_bfd, member);
1850 if (! ((*link_info.callbacks->add_archive_element)
1851 (&link_info, member, "--whole-archive")))
1854 if (! bfd_link_add_symbols (member, &link_info))
1856 einfo (_("%F%B: could not read symbols: %E\n"), member);
1861 entry->loaded = loaded;
1867 if (bfd_link_add_symbols (entry->the_bfd, &link_info))
1868 entry->loaded = TRUE;
1870 einfo (_("%F%B: could not read symbols: %E\n"), entry->the_bfd);
1872 return entry->loaded;
1875 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
1876 may be NULL, indicating that it is a wildcard. Separate
1877 lang_input_section statements are created for each part of the
1878 expansion; they are added after the wild statement S. OUTPUT is
1879 the output section. */
1882 wild (lang_wild_statement_type *s,
1883 const char *target ATTRIBUTE_UNUSED,
1884 lang_output_section_statement_type *output)
1886 struct wildcard_list *sec;
1888 walk_wild (s, output_section_callback, output);
1890 for (sec = s->section_list; sec != NULL; sec = sec->next)
1892 if (default_common_section != NULL)
1894 if (sec->spec.name != NULL && strcmp (sec->spec.name, "COMMON") == 0)
1896 /* Remember the section that common is going to in case we
1897 later get something which doesn't know where to put it. */
1898 default_common_section = output;
1903 /* Return TRUE iff target is the sought target. */
1906 get_target (const bfd_target *target, void *data)
1908 const char *sought = data;
1910 return strcmp (target->name, sought) == 0;
1913 /* Like strcpy() but convert to lower case as well. */
1916 stricpy (char *dest, char *src)
1920 while ((c = *src++) != 0)
1921 *dest++ = TOLOWER (c);
1926 /* Remove the first occurrence of needle (if any) in haystack
1930 strcut (char *haystack, char *needle)
1932 haystack = strstr (haystack, needle);
1938 for (src = haystack + strlen (needle); *src;)
1939 *haystack++ = *src++;
1945 /* Compare two target format name strings.
1946 Return a value indicating how "similar" they are. */
1949 name_compare (char *first, char *second)
1955 copy1 = xmalloc (strlen (first) + 1);
1956 copy2 = xmalloc (strlen (second) + 1);
1958 /* Convert the names to lower case. */
1959 stricpy (copy1, first);
1960 stricpy (copy2, second);
1962 /* Remove size and endian strings from the name. */
1963 strcut (copy1, "big");
1964 strcut (copy1, "little");
1965 strcut (copy2, "big");
1966 strcut (copy2, "little");
1968 /* Return a value based on how many characters match,
1969 starting from the beginning. If both strings are
1970 the same then return 10 * their length. */
1971 for (result = 0; copy1[result] == copy2[result]; result++)
1972 if (copy1[result] == 0)
1984 /* Set by closest_target_match() below. */
1985 static const bfd_target *winner;
1987 /* Scan all the valid bfd targets looking for one that has the endianness
1988 requirement that was specified on the command line, and is the nearest
1989 match to the original output target. */
1992 closest_target_match (const bfd_target *target, void *data)
1994 const bfd_target *original = data;
1996 if (command_line.endian == ENDIAN_BIG
1997 && target->byteorder != BFD_ENDIAN_BIG)
2000 if (command_line.endian == ENDIAN_LITTLE
2001 && target->byteorder != BFD_ENDIAN_LITTLE)
2004 /* Must be the same flavour. */
2005 if (target->flavour != original->flavour)
2008 /* If we have not found a potential winner yet, then record this one. */
2015 /* Oh dear, we now have two potential candidates for a successful match.
2016 Compare their names and choose the better one. */
2017 if (name_compare (target->name, original->name)
2018 > name_compare (winner->name, original->name))
2021 /* Keep on searching until wqe have checked them all. */
2025 /* Return the BFD target format of the first input file. */
2028 get_first_input_target (void)
2030 char *target = NULL;
2032 LANG_FOR_EACH_INPUT_STATEMENT (s)
2034 if (s->header.type == lang_input_statement_enum
2037 ldfile_open_file (s);
2039 if (s->the_bfd != NULL
2040 && bfd_check_format (s->the_bfd, bfd_object))
2042 target = bfd_get_target (s->the_bfd);
2054 lang_get_output_target (void)
2058 /* Has the user told us which output format to use? */
2059 if (output_target != NULL)
2060 return output_target;
2062 /* No - has the current target been set to something other than
2064 if (current_target != default_target)
2065 return current_target;
2067 /* No - can we determine the format of the first input file? */
2068 target = get_first_input_target ();
2072 /* Failed - use the default output target. */
2073 return default_target;
2076 /* Open the output file. */
2079 open_output (const char *name)
2083 output_target = lang_get_output_target ();
2085 /* Has the user requested a particular endianness on the command
2087 if (command_line.endian != ENDIAN_UNSET)
2089 const bfd_target *target;
2090 enum bfd_endian desired_endian;
2092 /* Get the chosen target. */
2093 target = bfd_search_for_target (get_target, (void *) output_target);
2095 /* If the target is not supported, we cannot do anything. */
2098 if (command_line.endian == ENDIAN_BIG)
2099 desired_endian = BFD_ENDIAN_BIG;
2101 desired_endian = BFD_ENDIAN_LITTLE;
2103 /* See if the target has the wrong endianness. This should
2104 not happen if the linker script has provided big and
2105 little endian alternatives, but some scrips don't do
2107 if (target->byteorder != desired_endian)
2109 /* If it does, then see if the target provides
2110 an alternative with the correct endianness. */
2111 if (target->alternative_target != NULL
2112 && (target->alternative_target->byteorder == desired_endian))
2113 output_target = target->alternative_target->name;
2116 /* Try to find a target as similar as possible to
2117 the default target, but which has the desired
2118 endian characteristic. */
2119 bfd_search_for_target (closest_target_match,
2122 /* Oh dear - we could not find any targets that
2123 satisfy our requirements. */
2125 einfo (_("%P: warning: could not find any targets"
2126 " that match endianness requirement\n"));
2128 output_target = winner->name;
2134 output = bfd_openw (name, output_target);
2138 if (bfd_get_error () == bfd_error_invalid_target)
2139 einfo (_("%P%F: target %s not found\n"), output_target);
2141 einfo (_("%P%F: cannot open output file %s: %E\n"), name);
2144 delete_output_file_on_failure = TRUE;
2146 if (! bfd_set_format (output, bfd_object))
2147 einfo (_("%P%F:%s: can not make object file: %E\n"), name);
2148 if (! bfd_set_arch_mach (output,
2149 ldfile_output_architecture,
2150 ldfile_output_machine))
2151 einfo (_("%P%F:%s: can not set architecture: %E\n"), name);
2153 link_info.hash = bfd_link_hash_table_create (output);
2154 if (link_info.hash == NULL)
2155 einfo (_("%P%F: can not create link hash table: %E\n"));
2157 bfd_set_gp_size (output, g_switch_value);
2162 ldlang_open_output (lang_statement_union_type *statement)
2164 switch (statement->header.type)
2166 case lang_output_statement_enum:
2167 ASSERT (output_bfd == NULL);
2168 output_bfd = open_output (statement->output_statement.name);
2169 ldemul_set_output_arch ();
2170 if (config.magic_demand_paged && !link_info.relocatable)
2171 output_bfd->flags |= D_PAGED;
2173 output_bfd->flags &= ~D_PAGED;
2174 if (config.text_read_only)
2175 output_bfd->flags |= WP_TEXT;
2177 output_bfd->flags &= ~WP_TEXT;
2178 if (link_info.traditional_format)
2179 output_bfd->flags |= BFD_TRADITIONAL_FORMAT;
2181 output_bfd->flags &= ~BFD_TRADITIONAL_FORMAT;
2184 case lang_target_statement_enum:
2185 current_target = statement->target_statement.target;
2192 /* Convert between addresses in bytes and sizes in octets.
2193 For currently supported targets, octets_per_byte is always a power
2194 of two, so we can use shifts. */
2195 #define TO_ADDR(X) ((X) >> opb_shift)
2196 #define TO_SIZE(X) ((X) << opb_shift)
2198 /* Support the above. */
2199 static unsigned int opb_shift = 0;
2204 unsigned x = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2205 ldfile_output_machine);
2208 while ((x & 1) == 0)
2216 /* Open all the input files. */
2219 open_input_bfds (lang_statement_union_type *s, bfd_boolean force)
2221 for (; s != NULL; s = s->header.next)
2223 switch (s->header.type)
2225 case lang_constructors_statement_enum:
2226 open_input_bfds (constructor_list.head, force);
2228 case lang_output_section_statement_enum:
2229 open_input_bfds (s->output_section_statement.children.head, force);
2231 case lang_wild_statement_enum:
2232 /* Maybe we should load the file's symbols. */
2233 if (s->wild_statement.filename
2234 && ! wildcardp (s->wild_statement.filename))
2235 lookup_name (s->wild_statement.filename);
2236 open_input_bfds (s->wild_statement.children.head, force);
2238 case lang_group_statement_enum:
2240 struct bfd_link_hash_entry *undefs;
2242 /* We must continually search the entries in the group
2243 until no new symbols are added to the list of undefined
2248 undefs = link_info.hash->undefs_tail;
2249 open_input_bfds (s->group_statement.children.head, TRUE);
2251 while (undefs != link_info.hash->undefs_tail);
2254 case lang_target_statement_enum:
2255 current_target = s->target_statement.target;
2257 case lang_input_statement_enum:
2258 if (s->input_statement.real)
2260 lang_statement_list_type add;
2262 s->input_statement.target = current_target;
2264 /* If we are being called from within a group, and this
2265 is an archive which has already been searched, then
2266 force it to be researched unless the whole archive
2267 has been loaded already. */
2269 && !s->input_statement.whole_archive
2270 && s->input_statement.loaded
2271 && bfd_check_format (s->input_statement.the_bfd,
2273 s->input_statement.loaded = FALSE;
2275 lang_list_init (&add);
2277 if (! load_symbols (&s->input_statement, &add))
2278 config.make_executable = FALSE;
2280 if (add.head != NULL)
2282 *add.tail = s->header.next;
2283 s->header.next = add.head;
2293 /* Add a symbol to a hash of symbols used in DEFINED (NAME) expressions. */
2296 lang_track_definedness (const char *name)
2298 if (bfd_hash_lookup (&lang_definedness_table, name, TRUE, FALSE) == NULL)
2299 einfo (_("%P%F: bfd_hash_lookup failed creating symbol %s\n"), name);
2302 /* New-function for the definedness hash table. */
2304 static struct bfd_hash_entry *
2305 lang_definedness_newfunc (struct bfd_hash_entry *entry,
2306 struct bfd_hash_table *table ATTRIBUTE_UNUSED,
2307 const char *name ATTRIBUTE_UNUSED)
2309 struct lang_definedness_hash_entry *ret
2310 = (struct lang_definedness_hash_entry *) entry;
2313 ret = (struct lang_definedness_hash_entry *)
2314 bfd_hash_allocate (table, sizeof (struct lang_definedness_hash_entry));
2317 einfo (_("%P%F: bfd_hash_allocate failed creating symbol %s\n"), name);
2319 ret->iteration = -1;
2323 /* Return the iteration when the definition of NAME was last updated. A
2324 value of -1 means that the symbol is not defined in the linker script
2325 or the command line, but may be defined in the linker symbol table. */
2328 lang_symbol_definition_iteration (const char *name)
2330 struct lang_definedness_hash_entry *defentry
2331 = (struct lang_definedness_hash_entry *)
2332 bfd_hash_lookup (&lang_definedness_table, name, FALSE, FALSE);
2334 /* We've already created this one on the presence of DEFINED in the
2335 script, so it can't be NULL unless something is borked elsewhere in
2337 if (defentry == NULL)
2340 return defentry->iteration;
2343 /* Update the definedness state of NAME. */
2346 lang_update_definedness (const char *name, struct bfd_link_hash_entry *h)
2348 struct lang_definedness_hash_entry *defentry
2349 = (struct lang_definedness_hash_entry *)
2350 bfd_hash_lookup (&lang_definedness_table, name, FALSE, FALSE);
2352 /* We don't keep track of symbols not tested with DEFINED. */
2353 if (defentry == NULL)
2356 /* If the symbol was already defined, and not from an earlier statement
2357 iteration, don't update the definedness iteration, because that'd
2358 make the symbol seem defined in the linker script at this point, and
2359 it wasn't; it was defined in some object. If we do anyway, DEFINED
2360 would start to yield false before this point and the construct "sym =
2361 DEFINED (sym) ? sym : X;" would change sym to X despite being defined
2363 if (h->type != bfd_link_hash_undefined
2364 && h->type != bfd_link_hash_common
2365 && h->type != bfd_link_hash_new
2366 && defentry->iteration == -1)
2369 defentry->iteration = lang_statement_iteration;
2372 /* Add the supplied name to the symbol table as an undefined reference.
2373 This is a two step process as the symbol table doesn't even exist at
2374 the time the ld command line is processed. First we put the name
2375 on a list, then, once the output file has been opened, transfer the
2376 name to the symbol table. */
2378 typedef struct bfd_sym_chain ldlang_undef_chain_list_type;
2380 #define ldlang_undef_chain_list_head entry_symbol.next
2383 ldlang_add_undef (const char *const name)
2385 ldlang_undef_chain_list_type *new =
2386 stat_alloc (sizeof (ldlang_undef_chain_list_type));
2388 new->next = ldlang_undef_chain_list_head;
2389 ldlang_undef_chain_list_head = new;
2391 new->name = xstrdup (name);
2393 if (output_bfd != NULL)
2394 insert_undefined (new->name);
2397 /* Insert NAME as undefined in the symbol table. */
2400 insert_undefined (const char *name)
2402 struct bfd_link_hash_entry *h;
2404 h = bfd_link_hash_lookup (link_info.hash, name, TRUE, FALSE, TRUE);
2406 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2407 if (h->type == bfd_link_hash_new)
2409 h->type = bfd_link_hash_undefined;
2410 h->u.undef.abfd = NULL;
2411 bfd_link_add_undef (link_info.hash, h);
2415 /* Run through the list of undefineds created above and place them
2416 into the linker hash table as undefined symbols belonging to the
2420 lang_place_undefineds (void)
2422 ldlang_undef_chain_list_type *ptr;
2424 for (ptr = ldlang_undef_chain_list_head; ptr != NULL; ptr = ptr->next)
2425 insert_undefined (ptr->name);
2428 /* Check for all readonly or some readwrite sections. */
2431 check_input_sections
2432 (lang_statement_union_type *s,
2433 lang_output_section_statement_type *output_section_statement)
2435 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
2437 switch (s->header.type)
2439 case lang_wild_statement_enum:
2440 walk_wild (&s->wild_statement, check_section_callback,
2441 output_section_statement);
2442 if (! output_section_statement->all_input_readonly)
2445 case lang_constructors_statement_enum:
2446 check_input_sections (constructor_list.head,
2447 output_section_statement);
2448 if (! output_section_statement->all_input_readonly)
2451 case lang_group_statement_enum:
2452 check_input_sections (s->group_statement.children.head,
2453 output_section_statement);
2454 if (! output_section_statement->all_input_readonly)
2463 /* Update wildcard statements if needed. */
2466 update_wild_statements (lang_statement_union_type *s)
2468 struct wildcard_list *sec;
2470 switch (sort_section)
2480 for (; s != NULL; s = s->header.next)
2482 switch (s->header.type)
2487 case lang_wild_statement_enum:
2488 sec = s->wild_statement.section_list;
2491 switch (sec->spec.sorted)
2494 sec->spec.sorted = sort_section;
2497 if (sort_section == by_alignment)
2498 sec->spec.sorted = by_name_alignment;
2501 if (sort_section == by_name)
2502 sec->spec.sorted = by_alignment_name;
2510 case lang_constructors_statement_enum:
2511 update_wild_statements (constructor_list.head);
2514 case lang_output_section_statement_enum:
2515 update_wild_statements
2516 (s->output_section_statement.children.head);
2519 case lang_group_statement_enum:
2520 update_wild_statements (s->group_statement.children.head);
2528 /* Open input files and attach to output sections. */
2531 map_input_to_output_sections
2532 (lang_statement_union_type *s, const char *target,
2533 lang_output_section_statement_type *os)
2535 for (; s != NULL; s = s->header.next)
2537 switch (s->header.type)
2539 case lang_wild_statement_enum:
2540 wild (&s->wild_statement, target, os);
2542 case lang_constructors_statement_enum:
2543 map_input_to_output_sections (constructor_list.head,
2547 case lang_output_section_statement_enum:
2548 if (s->output_section_statement.constraint)
2550 if (s->output_section_statement.constraint == -1)
2552 s->output_section_statement.all_input_readonly = TRUE;
2553 check_input_sections (s->output_section_statement.children.head,
2554 &s->output_section_statement);
2555 if ((s->output_section_statement.all_input_readonly
2556 && s->output_section_statement.constraint == ONLY_IF_RW)
2557 || (!s->output_section_statement.all_input_readonly
2558 && s->output_section_statement.constraint == ONLY_IF_RO))
2560 s->output_section_statement.constraint = -1;
2565 map_input_to_output_sections (s->output_section_statement.children.head,
2567 &s->output_section_statement);
2569 case lang_output_statement_enum:
2571 case lang_target_statement_enum:
2572 target = s->target_statement.target;
2574 case lang_group_statement_enum:
2575 map_input_to_output_sections (s->group_statement.children.head,
2579 case lang_data_statement_enum:
2580 /* Make sure that any sections mentioned in the expression
2582 exp_init_os (s->data_statement.exp);
2583 if (os != NULL && os->bfd_section == NULL)
2585 /* The output section gets contents, and then we inspect for
2586 any flags set in the input script which override any ALLOC. */
2587 os->bfd_section->flags |= SEC_HAS_CONTENTS;
2588 if (!(os->flags & SEC_NEVER_LOAD))
2589 os->bfd_section->flags |= SEC_ALLOC | SEC_LOAD;
2591 case lang_fill_statement_enum:
2592 case lang_input_section_enum:
2593 case lang_object_symbols_statement_enum:
2594 case lang_reloc_statement_enum:
2595 case lang_padding_statement_enum:
2596 case lang_input_statement_enum:
2597 if (os != NULL && os->bfd_section == NULL)
2600 case lang_assignment_statement_enum:
2601 if (os != NULL && os->bfd_section == NULL)
2604 /* Make sure that any sections mentioned in the assignment
2606 exp_init_os (s->assignment_statement.exp);
2608 case lang_afile_asection_pair_statement_enum:
2611 case lang_address_statement_enum:
2612 /* Mark the specified section with the supplied address.
2614 If this section was actually a segment marker, then the
2615 directive is ignored if the linker script explicitly
2616 processed the segment marker. Originally, the linker
2617 treated segment directives (like -Ttext on the
2618 command-line) as section directives. We honor the
2619 section directive semantics for backwards compatibilty;
2620 linker scripts that do not specifically check for
2621 SEGMENT_START automatically get the old semantics. */
2622 if (!s->address_statement.segment
2623 || !s->address_statement.segment->used)
2625 lang_output_section_statement_type *aos
2626 = (lang_output_section_statement_lookup
2627 (s->address_statement.section_name));
2629 if (aos->bfd_section == NULL)
2631 aos->addr_tree = s->address_statement.address;
2638 /* An output section might have been removed after its statement was
2639 added. For example, ldemul_before_allocation can remove dynamic
2640 sections if they turn out to be not needed. Clean them up here. */
2643 strip_excluded_output_sections (void)
2645 lang_output_section_statement_type *os;
2647 for (os = &lang_output_section_statement.head->output_section_statement;
2653 if (os->constraint == -1)
2655 s = os->bfd_section;
2656 if (s != NULL && (s->flags & SEC_EXCLUDE) != 0)
2660 os->bfd_section = NULL;
2662 for (p = &output_bfd->sections; *p; p = &(*p)->next)
2665 bfd_section_list_remove (output_bfd, p);
2666 output_bfd->section_count--;
2674 print_output_section_statement
2675 (lang_output_section_statement_type *output_section_statement)
2677 asection *section = output_section_statement->bfd_section;
2680 if (output_section_statement != abs_output_section)
2682 minfo ("\n%s", output_section_statement->name);
2684 if (section != NULL)
2686 print_dot = section->vma;
2688 len = strlen (output_section_statement->name);
2689 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2694 while (len < SECTION_NAME_MAP_LENGTH)
2700 minfo ("0x%V %W", section->vma, section->size);
2702 if (output_section_statement->load_base != NULL)
2706 addr = exp_get_abs_int (output_section_statement->load_base, 0,
2707 "load base", lang_final_phase_enum);
2708 minfo (_(" load address 0x%V"), addr);
2715 print_statement_list (output_section_statement->children.head,
2716 output_section_statement);
2720 print_assignment (lang_assignment_statement_type *assignment,
2721 lang_output_section_statement_type *output_section)
2726 etree_value_type result;
2728 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2731 if (assignment->exp->type.node_class == etree_assert)
2734 tree = assignment->exp->assert_s.child;
2738 const char *dst = assignment->exp->assign.dst;
2739 is_dot = dst[0] == '.' && dst[1] == 0;
2740 tree = assignment->exp->assign.src;
2743 result = exp_fold_tree (tree, output_section, lang_final_phase_enum,
2744 print_dot, &print_dot);
2749 value = result.value + result.section->bfd_section->vma;
2751 minfo ("0x%V", value);
2764 exp_print_tree (assignment->exp);
2769 print_input_statement (lang_input_statement_type *statm)
2771 if (statm->filename != NULL)
2773 fprintf (config.map_file, "LOAD %s\n", statm->filename);
2777 /* Print all symbols defined in a particular section. This is called
2778 via bfd_link_hash_traverse, or by print_all_symbols. */
2781 print_one_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr)
2783 asection *sec = ptr;
2785 if ((hash_entry->type == bfd_link_hash_defined
2786 || hash_entry->type == bfd_link_hash_defweak)
2787 && sec == hash_entry->u.def.section)
2791 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2794 (hash_entry->u.def.value
2795 + hash_entry->u.def.section->output_offset
2796 + hash_entry->u.def.section->output_section->vma));
2798 minfo (" %T\n", hash_entry->root.string);
2805 print_all_symbols (sec)
2808 struct fat_user_section_struct *ud = get_userdata (sec);
2809 struct map_symbol_def *def;
2814 *ud->map_symbol_def_tail = 0;
2815 for (def = ud->map_symbol_def_head; def; def = def->next)
2816 print_one_symbol (def->entry, sec);
2819 /* Print information about an input section to the map file. */
2822 print_input_section (lang_input_section_type *in)
2824 asection *i = in->section;
2825 bfd_size_type size = i->size;
2834 minfo ("%s", i->name);
2836 len = 1 + strlen (i->name);
2837 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2842 while (len < SECTION_NAME_MAP_LENGTH)
2848 if (i->output_section != NULL && (i->flags & SEC_EXCLUDE) == 0)
2849 addr = i->output_section->vma + i->output_offset;
2856 minfo ("0x%V %W %B\n", addr, TO_ADDR (size), i->owner);
2858 if (size != i->rawsize && i->rawsize != 0)
2860 len = SECTION_NAME_MAP_LENGTH + 3;
2872 minfo (_("%W (size before relaxing)\n"), i->rawsize);
2875 if (i->output_section != NULL && (i->flags & SEC_EXCLUDE) == 0)
2877 if (command_line.reduce_memory_overheads)
2878 bfd_link_hash_traverse (link_info.hash, print_one_symbol, i);
2880 print_all_symbols (i);
2882 print_dot = addr + TO_ADDR (size);
2888 print_fill_statement (lang_fill_statement_type *fill)
2892 fputs (" FILL mask 0x", config.map_file);
2893 for (p = fill->fill->data, size = fill->fill->size; size != 0; p++, size--)
2894 fprintf (config.map_file, "%02x", *p);
2895 fputs ("\n", config.map_file);
2899 print_data_statement (lang_data_statement_type *data)
2907 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2910 addr = data->output_vma;
2911 if (data->output_section != NULL)
2912 addr += data->output_section->vma;
2940 minfo ("0x%V %W %s 0x%v", addr, size, name, data->value);
2942 if (data->exp->type.node_class != etree_value)
2945 exp_print_tree (data->exp);
2950 print_dot = addr + TO_ADDR (size);
2953 /* Print an address statement. These are generated by options like
2957 print_address_statement (lang_address_statement_type *address)
2959 minfo (_("Address of section %s set to "), address->section_name);
2960 exp_print_tree (address->address);
2964 /* Print a reloc statement. */
2967 print_reloc_statement (lang_reloc_statement_type *reloc)
2974 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2977 addr = reloc->output_vma;
2978 if (reloc->output_section != NULL)
2979 addr += reloc->output_section->vma;
2981 size = bfd_get_reloc_size (reloc->howto);
2983 minfo ("0x%V %W RELOC %s ", addr, size, reloc->howto->name);
2985 if (reloc->name != NULL)
2986 minfo ("%s+", reloc->name);
2988 minfo ("%s+", reloc->section->name);
2990 exp_print_tree (reloc->addend_exp);
2994 print_dot = addr + TO_ADDR (size);
2998 print_padding_statement (lang_padding_statement_type *s)
3006 len = sizeof " *fill*" - 1;
3007 while (len < SECTION_NAME_MAP_LENGTH)
3013 addr = s->output_offset;
3014 if (s->output_section != NULL)
3015 addr += s->output_section->vma;
3016 minfo ("0x%V %W ", addr, (bfd_vma) s->size);
3018 if (s->fill->size != 0)
3022 for (p = s->fill->data, size = s->fill->size; size != 0; p++, size--)
3023 fprintf (config.map_file, "%02x", *p);
3028 print_dot = addr + TO_ADDR (s->size);
3032 print_wild_statement (lang_wild_statement_type *w,
3033 lang_output_section_statement_type *os)
3035 struct wildcard_list *sec;
3039 if (w->filenames_sorted)
3041 if (w->filename != NULL)
3042 minfo ("%s", w->filename);
3045 if (w->filenames_sorted)
3049 for (sec = w->section_list; sec; sec = sec->next)
3051 if (sec->spec.sorted)
3053 if (sec->spec.exclude_name_list != NULL)
3056 minfo ("EXCLUDE_FILE(%s", sec->spec.exclude_name_list->name);
3057 for (tmp = sec->spec.exclude_name_list->next; tmp; tmp = tmp->next)
3058 minfo (" %s", tmp->name);
3061 if (sec->spec.name != NULL)
3062 minfo ("%s", sec->spec.name);
3065 if (sec->spec.sorted)
3074 print_statement_list (w->children.head, os);
3077 /* Print a group statement. */
3080 print_group (lang_group_statement_type *s,
3081 lang_output_section_statement_type *os)
3083 fprintf (config.map_file, "START GROUP\n");
3084 print_statement_list (s->children.head, os);
3085 fprintf (config.map_file, "END GROUP\n");
3088 /* Print the list of statements in S.
3089 This can be called for any statement type. */
3092 print_statement_list (lang_statement_union_type *s,
3093 lang_output_section_statement_type *os)
3097 print_statement (s, os);
3102 /* Print the first statement in statement list S.
3103 This can be called for any statement type. */
3106 print_statement (lang_statement_union_type *s,
3107 lang_output_section_statement_type *os)
3109 switch (s->header.type)
3112 fprintf (config.map_file, _("Fail with %d\n"), s->header.type);
3115 case lang_constructors_statement_enum:
3116 if (constructor_list.head != NULL)
3118 if (constructors_sorted)
3119 minfo (" SORT (CONSTRUCTORS)\n");
3121 minfo (" CONSTRUCTORS\n");
3122 print_statement_list (constructor_list.head, os);
3125 case lang_wild_statement_enum:
3126 print_wild_statement (&s->wild_statement, os);
3128 case lang_address_statement_enum:
3129 print_address_statement (&s->address_statement);
3131 case lang_object_symbols_statement_enum:
3132 minfo (" CREATE_OBJECT_SYMBOLS\n");
3134 case lang_fill_statement_enum:
3135 print_fill_statement (&s->fill_statement);
3137 case lang_data_statement_enum:
3138 print_data_statement (&s->data_statement);
3140 case lang_reloc_statement_enum:
3141 print_reloc_statement (&s->reloc_statement);
3143 case lang_input_section_enum:
3144 print_input_section (&s->input_section);
3146 case lang_padding_statement_enum:
3147 print_padding_statement (&s->padding_statement);
3149 case lang_output_section_statement_enum:
3150 print_output_section_statement (&s->output_section_statement);
3152 case lang_assignment_statement_enum:
3153 print_assignment (&s->assignment_statement, os);
3155 case lang_target_statement_enum:
3156 fprintf (config.map_file, "TARGET(%s)\n", s->target_statement.target);
3158 case lang_output_statement_enum:
3159 minfo ("OUTPUT(%s", s->output_statement.name);
3160 if (output_target != NULL)
3161 minfo (" %s", output_target);
3164 case lang_input_statement_enum:
3165 print_input_statement (&s->input_statement);
3167 case lang_group_statement_enum:
3168 print_group (&s->group_statement, os);
3170 case lang_afile_asection_pair_statement_enum:
3177 print_statements (void)
3179 print_statement_list (statement_list.head, abs_output_section);
3182 /* Print the first N statements in statement list S to STDERR.
3183 If N == 0, nothing is printed.
3184 If N < 0, the entire list is printed.
3185 Intended to be called from GDB. */
3188 dprint_statement (lang_statement_union_type *s, int n)
3190 FILE *map_save = config.map_file;
3192 config.map_file = stderr;
3195 print_statement_list (s, abs_output_section);
3198 while (s && --n >= 0)
3200 print_statement (s, abs_output_section);
3205 config.map_file = map_save;
3209 insert_pad (lang_statement_union_type **ptr,
3211 unsigned int alignment_needed,
3212 asection *output_section,
3215 static fill_type zero_fill = { 1, { 0 } };
3216 lang_statement_union_type *pad;
3218 pad = ((lang_statement_union_type *)
3219 ((char *) ptr - offsetof (lang_statement_union_type, header.next)));
3220 if (ptr != &statement_list.head
3221 && pad->header.type == lang_padding_statement_enum
3222 && pad->padding_statement.output_section == output_section)
3224 /* Use the existing pad statement. The above test on output
3225 section is probably redundant, but it doesn't hurt to check. */
3229 /* Make a new padding statement, linked into existing chain. */
3230 pad = stat_alloc (sizeof (lang_padding_statement_type));
3231 pad->header.next = *ptr;
3233 pad->header.type = lang_padding_statement_enum;
3234 pad->padding_statement.output_section = output_section;
3237 pad->padding_statement.fill = fill;
3239 pad->padding_statement.output_offset = dot - output_section->vma;
3240 pad->padding_statement.size = alignment_needed;
3241 output_section->size += alignment_needed;
3244 /* Work out how much this section will move the dot point. */
3248 (lang_statement_union_type **this_ptr,
3249 lang_output_section_statement_type *output_section_statement,
3253 lang_input_section_type *is = &((*this_ptr)->input_section);
3254 asection *i = is->section;
3256 if (!is->ifile->just_syms_flag && (i->flags & SEC_EXCLUDE) == 0)
3258 unsigned int alignment_needed;
3261 /* Align this section first to the input sections requirement,
3262 then to the output section's requirement. If this alignment
3263 is greater than any seen before, then record it too. Perform
3264 the alignment by inserting a magic 'padding' statement. */
3266 if (output_section_statement->subsection_alignment != -1)
3267 i->alignment_power = output_section_statement->subsection_alignment;
3269 o = output_section_statement->bfd_section;
3270 if (o->alignment_power < i->alignment_power)
3271 o->alignment_power = i->alignment_power;
3273 alignment_needed = align_power (dot, i->alignment_power) - dot;
3275 if (alignment_needed != 0)
3277 insert_pad (this_ptr, fill, TO_SIZE (alignment_needed), o, dot);
3278 dot += alignment_needed;
3281 /* Remember where in the output section this input section goes. */
3283 i->output_offset = dot - o->vma;
3285 /* Mark how big the output section must be to contain this now. */
3286 dot += TO_ADDR (i->size);
3287 o->size = TO_SIZE (dot - o->vma);
3291 i->output_offset = i->vma - output_section_statement->bfd_section->vma;
3297 #define IGNORE_SECTION(s) \
3298 ((s->flags & SEC_NEVER_LOAD) != 0 \
3299 || (s->flags & SEC_ALLOC) == 0 \
3300 || ((s->flags & SEC_THREAD_LOCAL) != 0 \
3301 && (s->flags & SEC_LOAD) == 0) \
3304 /* Check to see if any allocated sections overlap with other allocated
3305 sections. This can happen if a linker script specifies the output
3306 section addresses of the two sections. */
3309 lang_check_section_addresses (void)
3313 /* Scan all sections in the output list. */
3314 for (s = output_bfd->sections; s != NULL; s = s->next)
3318 /* Ignore sections which are not loaded or which have no contents. */
3319 if (IGNORE_SECTION (s))
3322 /* Once we reach section 's' stop our seach. This prevents two
3323 warning messages from being produced, one for 'section A overlaps
3324 section B' and one for 'section B overlaps section A'. */
3325 for (os = output_bfd->sections; os != s; os = os->next)
3332 /* Only consider loadable sections with real contents. */
3333 if (IGNORE_SECTION (os))
3336 /* We must check the sections' LMA addresses not their
3337 VMA addresses because overlay sections can have
3338 overlapping VMAs but they must have distinct LMAs. */
3339 s_start = bfd_section_lma (output_bfd, s);
3340 os_start = bfd_section_lma (output_bfd, os);
3341 s_end = s_start + TO_ADDR (s->size) - 1;
3342 os_end = os_start + TO_ADDR (os->size) - 1;
3344 /* Look for an overlap. */
3345 if ((s_end < os_start) || (s_start > os_end))
3349 _("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
3350 s->name, s_start, s_end, os->name, os_start, os_end);
3352 /* Once we have found one overlap for this section,
3353 stop looking for others. */
3359 /* Make sure the new address is within the region. We explicitly permit the
3360 current address to be at the exact end of the region when the address is
3361 non-zero, in case the region is at the end of addressable memory and the
3362 calculation wraps around. */
3365 os_region_check (lang_output_section_statement_type *os,
3366 lang_memory_region_type *region,
3370 if ((region->current < region->origin
3371 || (region->current - region->origin > region->length))
3372 && ((region->current != region->origin + region->length)
3377 einfo (_("%X%P: address 0x%v of %B section %s"
3378 " is not within region %s\n"),
3380 os->bfd_section->owner,
3381 os->bfd_section->name,
3386 einfo (_("%X%P: region %s is full (%B section %s)\n"),
3388 os->bfd_section->owner,
3389 os->bfd_section->name);
3391 /* Reset the region pointer. */
3392 region->current = region->origin;
3396 /* Set the sizes for all the output sections. */
3399 lang_size_sections_1
3400 (lang_statement_union_type *s,
3401 lang_output_section_statement_type *output_section_statement,
3402 lang_statement_union_type **prev,
3406 bfd_boolean check_regions)
3408 /* Size up the sections from their constituent parts. */
3409 for (; s != NULL; s = s->header.next)
3411 switch (s->header.type)
3413 case lang_output_section_statement_enum:
3416 lang_output_section_statement_type *os;
3418 os = &s->output_section_statement;
3419 if (os->bfd_section == NULL)
3420 /* This section was never actually created. */
3423 /* If this is a COFF shared library section, use the size and
3424 address from the input section. FIXME: This is COFF
3425 specific; it would be cleaner if there were some other way
3426 to do this, but nothing simple comes to mind. */
3427 if ((os->bfd_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
3431 if (os->children.head == NULL
3432 || os->children.head->header.next != NULL
3433 || (os->children.head->header.type
3434 != lang_input_section_enum))
3435 einfo (_("%P%X: Internal error on COFF shared library"
3436 " section %s\n"), os->name);
3438 input = os->children.head->input_section.section;
3439 bfd_set_section_vma (os->bfd_section->owner,
3441 bfd_section_vma (input->owner, input));
3442 os->bfd_section->size = input->size;
3446 if (bfd_is_abs_section (os->bfd_section))
3448 /* No matter what happens, an abs section starts at zero. */
3449 ASSERT (os->bfd_section->vma == 0);
3453 if (os->addr_tree == NULL)
3455 /* No address specified for this section, get one
3456 from the region specification. */
3457 if (os->region == NULL
3458 || ((os->bfd_section->flags & (SEC_ALLOC | SEC_LOAD))
3459 && os->region->name[0] == '*'
3460 && strcmp (os->region->name,
3461 DEFAULT_MEMORY_REGION) == 0))
3463 os->region = lang_memory_default (os->bfd_section);
3466 /* If a loadable section is using the default memory
3467 region, and some non default memory regions were
3468 defined, issue an error message. */
3469 if (!IGNORE_SECTION (os->bfd_section)
3470 && ! link_info.relocatable
3472 && strcmp (os->region->name,
3473 DEFAULT_MEMORY_REGION) == 0
3474 && lang_memory_region_list != NULL
3475 && (strcmp (lang_memory_region_list->name,
3476 DEFAULT_MEMORY_REGION) != 0
3477 || lang_memory_region_list->next != NULL))
3479 /* By default this is an error rather than just a
3480 warning because if we allocate the section to the
3481 default memory region we can end up creating an
3482 excessively large binary, or even seg faulting when
3483 attempting to perform a negative seek. See
3484 sources.redhat.com/ml/binutils/2003-04/msg00423.html
3485 for an example of this. This behaviour can be
3486 overridden by the using the --no-check-sections
3488 if (command_line.check_section_addresses)
3489 einfo (_("%P%F: error: no memory region specified"
3490 " for loadable section `%s'\n"),
3491 bfd_get_section_name (output_bfd,
3494 einfo (_("%P: warning: no memory region specified"
3495 " for loadable section `%s'\n"),
3496 bfd_get_section_name (output_bfd,
3500 dot = os->region->current;
3502 if (os->section_alignment == -1)
3507 dot = align_power (dot,
3508 os->bfd_section->alignment_power);
3510 if (dot != olddot && config.warn_section_align)
3511 einfo (_("%P: warning: changing start of section"
3512 " %s by %u bytes\n"),
3513 os->name, (unsigned int) (dot - olddot));
3521 r = exp_fold_tree (os->addr_tree,
3523 lang_allocating_phase_enum,
3528 einfo (_("%F%S: non constant or forward reference"
3529 " address expression for section %s\n"),
3532 dot = r.value + r.section->bfd_section->vma;
3535 /* The section starts here.
3536 First, align to what the section needs. */
3538 if (os->section_alignment != -1)
3539 dot = align_power (dot, os->section_alignment);
3541 bfd_set_section_vma (0, os->bfd_section, dot);
3543 os->bfd_section->output_offset = 0;
3546 lang_size_sections_1 (os->children.head, os, &os->children.head,
3547 os->fill, dot, relax, check_regions);
3549 /* Put the section within the requested block size, or
3550 align at the block boundary. */
3551 after = ((os->bfd_section->vma
3552 + TO_ADDR (os->bfd_section->size)
3553 + os->block_value - 1)
3554 & - (bfd_vma) os->block_value);
3556 if (bfd_is_abs_section (os->bfd_section))
3557 ASSERT (after == os->bfd_section->vma);
3559 os->bfd_section->size
3560 = TO_SIZE (after - os->bfd_section->vma);
3562 dot = os->bfd_section->vma;
3563 /* .tbss sections effectively have zero size. */
3564 if ((os->bfd_section->flags & SEC_HAS_CONTENTS) != 0
3565 || (os->bfd_section->flags & SEC_THREAD_LOCAL) == 0
3566 || link_info.relocatable)
3567 dot += TO_ADDR (os->bfd_section->size);
3571 if (os->update_dot_tree != 0)
3572 exp_fold_tree (os->update_dot_tree, abs_output_section,
3573 lang_allocating_phase_enum, dot, &dot);
3575 /* Update dot in the region ?
3576 We only do this if the section is going to be allocated,
3577 since unallocated sections do not contribute to the region's
3578 overall size in memory.
3580 If the SEC_NEVER_LOAD bit is not set, it will affect the
3581 addresses of sections after it. We have to update
3583 if (os->region != NULL
3584 && ((os->bfd_section->flags & SEC_NEVER_LOAD) == 0
3585 || (os->bfd_section->flags & (SEC_ALLOC | SEC_LOAD))))
3587 os->region->current = dot;
3590 /* Make sure the new address is within the region. */
3591 os_region_check (os, os->region, os->addr_tree,
3592 os->bfd_section->vma);
3594 /* If there's no load address specified, use the run
3595 region as the load region. */
3596 if (os->lma_region == NULL && os->load_base == NULL)
3597 os->lma_region = os->region;
3599 if (os->lma_region != NULL && os->lma_region != os->region)
3601 /* Set load_base, which will be handled later. */
3602 os->load_base = exp_intop (os->lma_region->current);
3603 os->lma_region->current +=
3604 TO_ADDR (os->bfd_section->size);
3606 os_region_check (os, os->lma_region, NULL,
3607 os->bfd_section->lma);
3613 case lang_constructors_statement_enum:
3614 dot = lang_size_sections_1 (constructor_list.head,
3615 output_section_statement,
3616 &s->wild_statement.children.head,
3617 fill, dot, relax, check_regions);
3620 case lang_data_statement_enum:
3622 unsigned int size = 0;
3624 s->data_statement.output_vma =
3625 dot - output_section_statement->bfd_section->vma;
3626 s->data_statement.output_section =
3627 output_section_statement->bfd_section;
3629 /* We might refer to provided symbols in the expression, and
3630 need to mark them as needed. */
3631 exp_fold_tree (s->data_statement.exp, abs_output_section,
3632 lang_allocating_phase_enum, dot, &dot);
3634 switch (s->data_statement.type)
3652 if (size < TO_SIZE ((unsigned) 1))
3653 size = TO_SIZE ((unsigned) 1);
3654 dot += TO_ADDR (size);
3655 output_section_statement->bfd_section->size += size;
3659 case lang_reloc_statement_enum:
3663 s->reloc_statement.output_vma =
3664 dot - output_section_statement->bfd_section->vma;
3665 s->reloc_statement.output_section =
3666 output_section_statement->bfd_section;
3667 size = bfd_get_reloc_size (s->reloc_statement.howto);
3668 dot += TO_ADDR (size);
3669 output_section_statement->bfd_section->size += size;
3673 case lang_wild_statement_enum:
3675 dot = lang_size_sections_1 (s->wild_statement.children.head,
3676 output_section_statement,
3677 &s->wild_statement.children.head,
3678 fill, dot, relax, check_regions);
3682 case lang_object_symbols_statement_enum:
3683 link_info.create_object_symbols_section =
3684 output_section_statement->bfd_section;
3686 case lang_output_statement_enum:
3687 case lang_target_statement_enum:
3689 case lang_input_section_enum:
3693 i = (*prev)->input_section.section;
3698 if (! bfd_relax_section (i->owner, i, &link_info, &again))
3699 einfo (_("%P%F: can't relax section: %E\n"));
3703 dot = size_input_section (prev, output_section_statement,
3704 output_section_statement->fill, dot);
3707 case lang_input_statement_enum:
3709 case lang_fill_statement_enum:
3710 s->fill_statement.output_section =
3711 output_section_statement->bfd_section;
3713 fill = s->fill_statement.fill;
3715 case lang_assignment_statement_enum:
3717 bfd_vma newdot = dot;
3719 exp_fold_tree (s->assignment_statement.exp,
3720 output_section_statement,
3721 lang_allocating_phase_enum,
3727 if (output_section_statement == abs_output_section)
3729 /* If we don't have an output section, then just adjust
3730 the default memory address. */
3731 lang_memory_region_lookup (DEFAULT_MEMORY_REGION,
3732 FALSE)->current = newdot;
3736 /* Insert a pad after this statement. We can't
3737 put the pad before when relaxing, in case the
3738 assignment references dot. */
3739 insert_pad (&s->header.next, fill, TO_SIZE (newdot - dot),
3740 output_section_statement->bfd_section, dot);
3742 /* Don't neuter the pad below when relaxing. */
3746 /* If dot is advanced, this implies that the section should
3747 have space allocated to it, unless the user has explicitly
3748 stated that the section should never be loaded. */
3749 if (!(output_section_statement->flags
3750 & (SEC_NEVER_LOAD | SEC_ALLOC)))
3751 output_section_statement->bfd_section->flags |= SEC_ALLOC;
3758 case lang_padding_statement_enum:
3759 /* If this is the first time lang_size_sections is called,
3760 we won't have any padding statements. If this is the
3761 second or later passes when relaxing, we should allow
3762 padding to shrink. If padding is needed on this pass, it
3763 will be added back in. */
3764 s->padding_statement.size = 0;
3766 /* Make sure output_offset is valid. If relaxation shrinks
3767 the section and this pad isn't needed, it's possible to
3768 have output_offset larger than the final size of the
3769 section. bfd_set_section_contents will complain even for
3770 a pad size of zero. */
3771 s->padding_statement.output_offset
3772 = dot - output_section_statement->bfd_section->vma;
3775 case lang_group_statement_enum:
3776 dot = lang_size_sections_1 (s->group_statement.children.head,
3777 output_section_statement,
3778 &s->group_statement.children.head,
3779 fill, dot, relax, check_regions);
3786 /* We can only get here when relaxing is turned on. */
3787 case lang_address_statement_enum:
3790 prev = &s->header.next;
3797 (lang_statement_union_type *s,
3798 lang_output_section_statement_type *output_section_statement,
3799 lang_statement_union_type **prev,
3803 bfd_boolean check_regions)
3807 /* Callers of exp_fold_tree need to increment this. */
3808 lang_statement_iteration++;
3810 exp_data_seg.phase = exp_dataseg_none;
3811 result = lang_size_sections_1 (s, output_section_statement, prev, fill,
3812 dot, relax, check_regions);
3813 if (exp_data_seg.phase == exp_dataseg_end_seen
3814 && link_info.relro && exp_data_seg.relro_end)
3816 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END pair was seen, try
3817 to put exp_data_seg.relro on a (common) page boundary. */
3818 bfd_vma old_min_base, relro_end, maxpage;
3820 exp_data_seg.phase = exp_dataseg_relro_adjust;
3821 old_min_base = exp_data_seg.min_base;
3822 maxpage = exp_data_seg.maxpagesize;
3823 exp_data_seg.base += (-exp_data_seg.relro_end
3824 & (exp_data_seg.pagesize - 1));
3825 /* Compute the expected PT_GNU_RELRO segment end. */
3826 relro_end = (exp_data_seg.relro_end + exp_data_seg.pagesize - 1)
3827 & ~(exp_data_seg.pagesize - 1);
3828 if (old_min_base + maxpage < exp_data_seg.base)
3830 exp_data_seg.base -= maxpage;
3831 relro_end -= maxpage;
3833 result = lang_size_sections_1 (s, output_section_statement, prev, fill,
3834 dot, relax, check_regions);
3835 if (exp_data_seg.relro_end > relro_end)
3837 /* The alignment of sections between DATA_SEGMENT_ALIGN
3838 and DATA_SEGMENT_RELRO_END caused huge padding to be
3839 inserted at DATA_SEGMENT_RELRO_END. Try some other base. */
3841 unsigned int max_alignment_power = 0;
3843 /* Find maximum alignment power of sections between
3844 DATA_SEGMENT_ALIGN and DATA_SEGMENT_RELRO_END. */
3845 for (sec = output_bfd->sections; sec; sec = sec->next)
3846 if (sec->vma >= exp_data_seg.base
3847 && sec->vma < exp_data_seg.relro_end
3848 && sec->alignment_power > max_alignment_power)
3849 max_alignment_power = sec->alignment_power;
3851 if (((bfd_vma) 1 << max_alignment_power) < exp_data_seg.pagesize)
3853 if (exp_data_seg.base - (1 << max_alignment_power)
3855 exp_data_seg.base += exp_data_seg.pagesize;
3856 exp_data_seg.base -= (1 << max_alignment_power);
3857 result = lang_size_sections_1 (s, output_section_statement,
3858 prev, fill, dot, relax,
3862 link_info.relro_start = exp_data_seg.base;
3863 link_info.relro_end = exp_data_seg.relro_end;
3865 else if (exp_data_seg.phase == exp_dataseg_end_seen)
3867 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether
3868 a page could be saved in the data segment. */
3869 bfd_vma first, last;
3871 first = -exp_data_seg.base & (exp_data_seg.pagesize - 1);
3872 last = exp_data_seg.end & (exp_data_seg.pagesize - 1);
3874 && ((exp_data_seg.base & ~(exp_data_seg.pagesize - 1))
3875 != (exp_data_seg.end & ~(exp_data_seg.pagesize - 1)))
3876 && first + last <= exp_data_seg.pagesize)
3878 exp_data_seg.phase = exp_dataseg_adjust;
3879 lang_statement_iteration++;
3880 result = lang_size_sections_1 (s, output_section_statement, prev,
3881 fill, dot, relax, check_regions);
3888 /* Worker function for lang_do_assignments. Recursiveness goes here. */
3891 lang_do_assignments_1
3892 (lang_statement_union_type *s,
3893 lang_output_section_statement_type *output_section_statement,
3897 for (; s != NULL; s = s->header.next)
3899 switch (s->header.type)
3901 case lang_constructors_statement_enum:
3902 dot = lang_do_assignments_1 (constructor_list.head,
3903 output_section_statement,
3908 case lang_output_section_statement_enum:
3910 lang_output_section_statement_type *os;
3912 os = &(s->output_section_statement);
3913 if (os->bfd_section != NULL)
3915 dot = os->bfd_section->vma;
3916 lang_do_assignments_1 (os->children.head, os, os->fill, dot);
3917 /* .tbss sections effectively have zero size. */
3918 if ((os->bfd_section->flags & SEC_HAS_CONTENTS) != 0
3919 || (os->bfd_section->flags & SEC_THREAD_LOCAL) == 0
3920 || link_info.relocatable)
3921 dot += TO_ADDR (os->bfd_section->size);
3925 /* If nothing has been placed into the output section then
3926 it won't have a bfd_section. */
3927 if (os->bfd_section)
3929 os->bfd_section->lma
3930 = exp_get_abs_int (os->load_base, 0, "load base",
3931 lang_final_phase_enum);
3936 case lang_wild_statement_enum:
3938 dot = lang_do_assignments_1 (s->wild_statement.children.head,
3939 output_section_statement,
3944 case lang_object_symbols_statement_enum:
3945 case lang_output_statement_enum:
3946 case lang_target_statement_enum:
3948 case lang_data_statement_enum:
3950 etree_value_type value;
3952 value = exp_fold_tree (s->data_statement.exp,
3954 lang_final_phase_enum, dot, &dot);
3956 einfo (_("%F%P: invalid data statement\n"));
3957 s->data_statement.value
3958 = value.value + value.section->bfd_section->vma;
3962 switch (s->data_statement.type)
3980 if (size < TO_SIZE ((unsigned) 1))
3981 size = TO_SIZE ((unsigned) 1);
3982 dot += TO_ADDR (size);
3986 case lang_reloc_statement_enum:
3988 etree_value_type value;
3990 value = exp_fold_tree (s->reloc_statement.addend_exp,
3992 lang_final_phase_enum, dot, &dot);
3993 s->reloc_statement.addend_value = value.value;
3995 einfo (_("%F%P: invalid reloc statement\n"));
3997 dot += TO_ADDR (bfd_get_reloc_size (s->reloc_statement.howto));
4000 case lang_input_section_enum:
4002 asection *in = s->input_section.section;
4004 if ((in->flags & SEC_EXCLUDE) == 0)
4005 dot += TO_ADDR (in->size);
4009 case lang_input_statement_enum:
4011 case lang_fill_statement_enum:
4012 fill = s->fill_statement.fill;
4014 case lang_assignment_statement_enum:
4016 exp_fold_tree (s->assignment_statement.exp,
4017 output_section_statement,
4018 lang_final_phase_enum,
4024 case lang_padding_statement_enum:
4025 dot += TO_ADDR (s->padding_statement.size);
4028 case lang_group_statement_enum:
4029 dot = lang_do_assignments_1 (s->group_statement.children.head,
4030 output_section_statement,
4038 case lang_address_statement_enum:
4048 (lang_statement_union_type *s,
4049 lang_output_section_statement_type *output_section_statement,
4053 /* Callers of exp_fold_tree need to increment this. */
4054 lang_statement_iteration++;
4055 lang_do_assignments_1 (s, output_section_statement, fill, dot);
4058 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
4059 operator .startof. (section_name), it produces an undefined symbol
4060 .startof.section_name. Similarly, when it sees
4061 .sizeof. (section_name), it produces an undefined symbol
4062 .sizeof.section_name. For all the output sections, we look for
4063 such symbols, and set them to the correct value. */
4066 lang_set_startof (void)
4070 if (link_info.relocatable)
4073 for (s = output_bfd->sections; s != NULL; s = s->next)
4075 const char *secname;
4077 struct bfd_link_hash_entry *h;
4079 secname = bfd_get_section_name (output_bfd, s);
4080 buf = xmalloc (10 + strlen (secname));
4082 sprintf (buf, ".startof.%s", secname);
4083 h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE, TRUE);
4084 if (h != NULL && h->type == bfd_link_hash_undefined)
4086 h->type = bfd_link_hash_defined;
4087 h->u.def.value = bfd_get_section_vma (output_bfd, s);
4088 h->u.def.section = bfd_abs_section_ptr;
4091 sprintf (buf, ".sizeof.%s", secname);
4092 h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE, TRUE);
4093 if (h != NULL && h->type == bfd_link_hash_undefined)
4095 h->type = bfd_link_hash_defined;
4096 h->u.def.value = TO_ADDR (s->size);
4097 h->u.def.section = bfd_abs_section_ptr;
4107 struct bfd_link_hash_entry *h;
4110 if (link_info.relocatable || link_info.shared)
4115 if (entry_symbol.name == NULL)
4117 /* No entry has been specified. Look for start, but don't warn
4118 if we don't find it. */
4119 entry_symbol.name = "start";
4123 h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
4124 FALSE, FALSE, TRUE);
4126 && (h->type == bfd_link_hash_defined
4127 || h->type == bfd_link_hash_defweak)
4128 && h->u.def.section->output_section != NULL)
4132 val = (h->u.def.value
4133 + bfd_get_section_vma (output_bfd,
4134 h->u.def.section->output_section)
4135 + h->u.def.section->output_offset);
4136 if (! bfd_set_start_address (output_bfd, val))
4137 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol.name);
4144 /* We couldn't find the entry symbol. Try parsing it as a
4146 val = bfd_scan_vma (entry_symbol.name, &send, 0);
4149 if (! bfd_set_start_address (output_bfd, val))
4150 einfo (_("%P%F: can't set start address\n"));
4156 /* Can't find the entry symbol, and it's not a number. Use
4157 the first address in the text section. */
4158 ts = bfd_get_section_by_name (output_bfd, entry_section);
4162 einfo (_("%P: warning: cannot find entry symbol %s;"
4163 " defaulting to %V\n"),
4165 bfd_get_section_vma (output_bfd, ts));
4166 if (! bfd_set_start_address (output_bfd,
4167 bfd_get_section_vma (output_bfd,
4169 einfo (_("%P%F: can't set start address\n"));
4174 einfo (_("%P: warning: cannot find entry symbol %s;"
4175 " not setting start address\n"),
4181 /* Don't bfd_hash_table_free (&lang_definedness_table);
4182 map file output may result in a call of lang_track_definedness. */
4185 /* This is a small function used when we want to ignore errors from
4189 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED, ...)
4191 /* Don't do anything. */
4194 /* Check that the architecture of all the input files is compatible
4195 with the output file. Also call the backend to let it do any
4196 other checking that is needed. */
4201 lang_statement_union_type *file;
4203 const bfd_arch_info_type *compatible;
4205 for (file = file_chain.head; file != NULL; file = file->input_statement.next)
4207 input_bfd = file->input_statement.the_bfd;
4209 = bfd_arch_get_compatible (input_bfd, output_bfd,
4210 command_line.accept_unknown_input_arch);
4212 /* In general it is not possible to perform a relocatable
4213 link between differing object formats when the input
4214 file has relocations, because the relocations in the
4215 input format may not have equivalent representations in
4216 the output format (and besides BFD does not translate
4217 relocs for other link purposes than a final link). */
4218 if ((link_info.relocatable || link_info.emitrelocations)
4219 && (compatible == NULL
4220 || bfd_get_flavour (input_bfd) != bfd_get_flavour (output_bfd))
4221 && (bfd_get_file_flags (input_bfd) & HAS_RELOC) != 0)
4223 einfo (_("%P%F: Relocatable linking with relocations from"
4224 " format %s (%B) to format %s (%B) is not supported\n"),
4225 bfd_get_target (input_bfd), input_bfd,
4226 bfd_get_target (output_bfd), output_bfd);
4227 /* einfo with %F exits. */
4230 if (compatible == NULL)
4232 if (command_line.warn_mismatch)
4233 einfo (_("%P: warning: %s architecture of input file `%B'"
4234 " is incompatible with %s output\n"),
4235 bfd_printable_name (input_bfd), input_bfd,
4236 bfd_printable_name (output_bfd));
4238 else if (bfd_count_sections (input_bfd))
4240 /* If the input bfd has no contents, it shouldn't set the
4241 private data of the output bfd. */
4243 bfd_error_handler_type pfn = NULL;
4245 /* If we aren't supposed to warn about mismatched input
4246 files, temporarily set the BFD error handler to a
4247 function which will do nothing. We still want to call
4248 bfd_merge_private_bfd_data, since it may set up
4249 information which is needed in the output file. */
4250 if (! command_line.warn_mismatch)
4251 pfn = bfd_set_error_handler (ignore_bfd_errors);
4252 if (! bfd_merge_private_bfd_data (input_bfd, output_bfd))
4254 if (command_line.warn_mismatch)
4255 einfo (_("%P%X: failed to merge target specific data"
4256 " of file %B\n"), input_bfd);
4258 if (! command_line.warn_mismatch)
4259 bfd_set_error_handler (pfn);
4264 /* Look through all the global common symbols and attach them to the
4265 correct section. The -sort-common command line switch may be used
4266 to roughly sort the entries by size. */
4271 if (command_line.inhibit_common_definition)
4273 if (link_info.relocatable
4274 && ! command_line.force_common_definition)
4277 if (! config.sort_common)
4278 bfd_link_hash_traverse (link_info.hash, lang_one_common, NULL);
4283 for (power = 4; power >= 0; power--)
4284 bfd_link_hash_traverse (link_info.hash, lang_one_common, &power);
4288 /* Place one common symbol in the correct section. */
4291 lang_one_common (struct bfd_link_hash_entry *h, void *info)
4293 unsigned int power_of_two;
4297 if (h->type != bfd_link_hash_common)
4301 power_of_two = h->u.c.p->alignment_power;
4303 if (config.sort_common
4304 && power_of_two < (unsigned int) *(int *) info)
4307 section = h->u.c.p->section;
4309 /* Increase the size of the section to align the common sym. */
4310 section->size += ((bfd_vma) 1 << (power_of_two + opb_shift)) - 1;
4311 section->size &= (- (bfd_vma) 1 << (power_of_two + opb_shift));
4313 /* Adjust the alignment if necessary. */
4314 if (power_of_two > section->alignment_power)
4315 section->alignment_power = power_of_two;
4317 /* Change the symbol from common to defined. */
4318 h->type = bfd_link_hash_defined;
4319 h->u.def.section = section;
4320 h->u.def.value = section->size;
4322 /* Increase the size of the section. */
4323 section->size += size;
4325 /* Make sure the section is allocated in memory, and make sure that
4326 it is no longer a common section. */
4327 section->flags |= SEC_ALLOC;
4328 section->flags &= ~SEC_IS_COMMON;
4330 if (config.map_file != NULL)
4332 static bfd_boolean header_printed;
4337 if (! header_printed)
4339 minfo (_("\nAllocating common symbols\n"));
4340 minfo (_("Common symbol size file\n\n"));
4341 header_printed = TRUE;
4344 name = demangle (h->root.string);
4346 len = strlen (name);
4361 if (size <= 0xffffffff)
4362 sprintf (buf, "%lx", (unsigned long) size);
4364 sprintf_vma (buf, size);
4374 minfo ("%B\n", section->owner);
4380 /* Run through the input files and ensure that every input section has
4381 somewhere to go. If one is found without a destination then create
4382 an input request and place it into the statement tree. */
4385 lang_place_orphans (void)
4387 LANG_FOR_EACH_INPUT_STATEMENT (file)
4391 for (s = file->the_bfd->sections; s != NULL; s = s->next)
4393 if (s->output_section == NULL)
4395 /* This section of the file is not attached, root
4396 around for a sensible place for it to go. */
4398 if (file->just_syms_flag)
4399 bfd_link_just_syms (file->the_bfd, s, &link_info);
4400 else if ((s->flags & SEC_EXCLUDE) != 0)
4401 s->output_section = bfd_abs_section_ptr;
4402 else if (strcmp (s->name, "COMMON") == 0)
4404 /* This is a lonely common section which must have
4405 come from an archive. We attach to the section
4406 with the wildcard. */
4407 if (! link_info.relocatable
4408 || command_line.force_common_definition)
4410 if (default_common_section == NULL)
4412 default_common_section =
4413 lang_output_section_statement_lookup (".bss");
4416 lang_add_section (&default_common_section->children, s,
4417 default_common_section, file);
4420 else if (ldemul_place_orphan (file, s))
4424 lang_output_section_statement_type *os;
4426 os = lang_output_section_statement_lookup (s->name);
4427 lang_add_section (&os->children, s, os, file);
4435 lang_set_flags (lang_memory_region_type *ptr, const char *flags, int invert)
4437 flagword *ptr_flags;
4439 ptr_flags = invert ? &ptr->not_flags : &ptr->flags;
4445 *ptr_flags |= SEC_ALLOC;
4449 *ptr_flags |= SEC_READONLY;
4453 *ptr_flags |= SEC_DATA;
4457 *ptr_flags |= SEC_CODE;
4462 *ptr_flags |= SEC_LOAD;
4466 einfo (_("%P%F: invalid syntax in flags\n"));
4473 /* Call a function on each input file. This function will be called
4474 on an archive, but not on the elements. */
4477 lang_for_each_input_file (void (*func) (lang_input_statement_type *))
4479 lang_input_statement_type *f;
4481 for (f = (lang_input_statement_type *) input_file_chain.head;
4483 f = (lang_input_statement_type *) f->next_real_file)
4487 /* Call a function on each file. The function will be called on all
4488 the elements of an archive which are included in the link, but will
4489 not be called on the archive file itself. */
4492 lang_for_each_file (void (*func) (lang_input_statement_type *))
4494 LANG_FOR_EACH_INPUT_STATEMENT (f)
4501 ldlang_add_file (lang_input_statement_type *entry)
4505 lang_statement_append (&file_chain,
4506 (lang_statement_union_type *) entry,
4509 /* The BFD linker needs to have a list of all input BFDs involved in
4511 ASSERT (entry->the_bfd->link_next == NULL);
4512 ASSERT (entry->the_bfd != output_bfd);
4513 for (pp = &link_info.input_bfds; *pp != NULL; pp = &(*pp)->link_next)
4515 *pp = entry->the_bfd;
4516 entry->the_bfd->usrdata = entry;
4517 bfd_set_gp_size (entry->the_bfd, g_switch_value);
4519 /* Look through the sections and check for any which should not be
4520 included in the link. We need to do this now, so that we can
4521 notice when the backend linker tries to report multiple
4522 definition errors for symbols which are in sections we aren't
4523 going to link. FIXME: It might be better to entirely ignore
4524 symbols which are defined in sections which are going to be
4525 discarded. This would require modifying the backend linker for
4526 each backend which might set the SEC_LINK_ONCE flag. If we do
4527 this, we should probably handle SEC_EXCLUDE in the same way. */
4529 bfd_map_over_sections (entry->the_bfd, section_already_linked, entry);
4533 lang_add_output (const char *name, int from_script)
4535 /* Make -o on command line override OUTPUT in script. */
4536 if (!had_output_filename || !from_script)
4538 output_filename = name;
4539 had_output_filename = TRUE;
4543 static lang_output_section_statement_type *current_section;
4554 for (l = 0; l < 32; l++)
4556 if (i >= (unsigned int) x)
4564 lang_output_section_statement_type *
4565 lang_enter_output_section_statement (const char *output_section_statement_name,
4566 etree_type *address_exp,
4567 enum section_type sectype,
4569 etree_type *subalign,
4573 lang_output_section_statement_type *os;
4577 lang_output_section_statement_lookup_1 (output_section_statement_name,
4580 /* Make next things chain into subchain of this. */
4582 if (os->addr_tree == NULL)
4584 os->addr_tree = address_exp;
4586 os->sectype = sectype;
4587 if (sectype != noload_section)
4588 os->flags = SEC_NO_FLAGS;
4590 os->flags = SEC_NEVER_LOAD;
4591 os->block_value = 1;
4592 stat_ptr = &os->children;
4594 os->subsection_alignment =
4595 topower (exp_get_value_int (subalign, -1, "subsection alignment", 0));
4596 os->section_alignment =
4597 topower (exp_get_value_int (align, -1, "section alignment", 0));
4599 os->load_base = ebase;
4606 lang_output_statement_type *new =
4607 new_stat (lang_output_statement, stat_ptr);
4609 new->name = output_filename;
4612 /* Reset the current counters in the regions. */
4615 lang_reset_memory_regions (void)
4617 lang_memory_region_type *p = lang_memory_region_list;
4620 for (p = lang_memory_region_list; p != NULL; p = p->next)
4622 p->old_length = (bfd_size_type) (p->current - p->origin);
4623 p->current = p->origin;
4626 for (o = output_bfd->sections; o != NULL; o = o->next)
4628 /* Save the last size for possible use by bfd_relax_section. */
4629 o->rawsize = o->size;
4634 /* Worker for lang_gc_sections_1. */
4637 gc_section_callback (lang_wild_statement_type *ptr,
4638 struct wildcard_list *sec ATTRIBUTE_UNUSED,
4640 lang_input_statement_type *file ATTRIBUTE_UNUSED,
4641 void *data ATTRIBUTE_UNUSED)
4643 /* If the wild pattern was marked KEEP, the member sections
4644 should be as well. */
4645 if (ptr->keep_sections)
4646 section->flags |= SEC_KEEP;
4649 /* Iterate over sections marking them against GC. */
4652 lang_gc_sections_1 (lang_statement_union_type *s)
4654 for (; s != NULL; s = s->header.next)
4656 switch (s->header.type)
4658 case lang_wild_statement_enum:
4659 walk_wild (&s->wild_statement, gc_section_callback, NULL);
4661 case lang_constructors_statement_enum:
4662 lang_gc_sections_1 (constructor_list.head);
4664 case lang_output_section_statement_enum:
4665 lang_gc_sections_1 (s->output_section_statement.children.head);
4667 case lang_group_statement_enum:
4668 lang_gc_sections_1 (s->group_statement.children.head);
4677 lang_gc_sections (void)
4679 struct bfd_link_hash_entry *h;
4680 ldlang_undef_chain_list_type *ulist;
4682 /* Keep all sections so marked in the link script. */
4684 lang_gc_sections_1 (statement_list.head);
4686 /* Keep all sections containing symbols undefined on the command-line,
4687 and the section containing the entry symbol. */
4689 for (ulist = link_info.gc_sym_list; ulist; ulist = ulist->next)
4691 h = bfd_link_hash_lookup (link_info.hash, ulist->name,
4692 FALSE, FALSE, FALSE);
4695 && (h->type == bfd_link_hash_defined
4696 || h->type == bfd_link_hash_defweak)
4697 && ! bfd_is_abs_section (h->u.def.section))
4699 h->u.def.section->flags |= SEC_KEEP;
4703 /* SEC_EXCLUDE is ignored when doing a relocatable link, except in
4704 the special case of debug info. (See bfd/stabs.c)
4705 Twiddle the flag here, to simplify later linker code. */
4706 if (link_info.relocatable)
4708 LANG_FOR_EACH_INPUT_STATEMENT (f)
4711 for (sec = f->the_bfd->sections; sec != NULL; sec = sec->next)
4712 if ((sec->flags & SEC_DEBUGGING) == 0)
4713 sec->flags &= ~SEC_EXCLUDE;
4717 if (command_line.gc_sections)
4718 bfd_gc_sections (output_bfd, &link_info);
4724 current_target = default_target;
4726 /* Open the output file. */
4727 lang_for_each_statement (ldlang_open_output);
4730 ldemul_create_output_section_statements ();
4732 /* Add to the hash table all undefineds on the command line. */
4733 lang_place_undefineds ();
4735 if (!bfd_section_already_linked_table_init ())
4736 einfo (_("%P%F: Failed to create hash table\n"));
4738 /* Create a bfd for each input file. */
4739 current_target = default_target;
4740 open_input_bfds (statement_list.head, FALSE);
4742 link_info.gc_sym_list = &entry_symbol;
4743 if (entry_symbol.name == NULL)
4744 link_info.gc_sym_list = ldlang_undef_chain_list_head;
4746 ldemul_after_open ();
4748 bfd_section_already_linked_table_free ();
4750 /* Make sure that we're not mixing architectures. We call this
4751 after all the input files have been opened, but before we do any
4752 other processing, so that any operations merge_private_bfd_data
4753 does on the output file will be known during the rest of the
4757 /* Handle .exports instead of a version script if we're told to do so. */
4758 if (command_line.version_exports_section)
4759 lang_do_version_exports_section ();
4761 /* Build all sets based on the information gathered from the input
4763 ldctor_build_sets ();
4765 /* Remove unreferenced sections if asked to. */
4766 lang_gc_sections ();
4768 /* Size up the common data. */
4771 /* Update wild statements. */
4772 update_wild_statements (statement_list.head);
4774 /* Run through the contours of the script and attach input sections
4775 to the correct output sections. */
4776 map_input_to_output_sections (statement_list.head, NULL, NULL);
4778 /* Find any sections not attached explicitly and handle them. */
4779 lang_place_orphans ();
4781 if (! link_info.relocatable)
4785 /* Merge SEC_MERGE sections. This has to be done after GC of
4786 sections, so that GCed sections are not merged, but before
4787 assigning dynamic symbols, since removing whole input sections
4789 bfd_merge_sections (output_bfd, &link_info);
4791 /* Look for a text section and set the readonly attribute in it. */
4792 found = bfd_get_section_by_name (output_bfd, ".text");
4796 if (config.text_read_only)
4797 found->flags |= SEC_READONLY;
4799 found->flags &= ~SEC_READONLY;
4803 /* Do anything special before sizing sections. This is where ELF
4804 and other back-ends size dynamic sections. */
4805 ldemul_before_allocation ();
4807 if (!link_info.relocatable)
4808 strip_excluded_output_sections ();
4810 /* We must record the program headers before we try to fix the
4811 section positions, since they will affect SIZEOF_HEADERS. */
4812 lang_record_phdrs ();
4814 /* Size up the sections. */
4815 lang_size_sections (statement_list.head, abs_output_section,
4816 &statement_list.head, 0, 0, NULL,
4817 command_line.relax ? FALSE : TRUE);
4819 /* Now run around and relax if we can. */
4820 if (command_line.relax)
4822 /* Keep relaxing until bfd_relax_section gives up. */
4823 bfd_boolean relax_again;
4827 relax_again = FALSE;
4829 /* Note: pe-dll.c does something like this also. If you find
4830 you need to change this code, you probably need to change
4831 pe-dll.c also. DJ */
4833 /* Do all the assignments with our current guesses as to
4835 lang_do_assignments (statement_list.head, abs_output_section,
4838 /* We must do this after lang_do_assignments, because it uses
4840 lang_reset_memory_regions ();
4842 /* Perform another relax pass - this time we know where the
4843 globals are, so can make a better guess. */
4844 lang_size_sections (statement_list.head, abs_output_section,
4845 &statement_list.head, 0, 0, &relax_again, FALSE);
4847 /* If the normal relax is done and the relax finalize pass
4848 is not performed yet, we perform another relax pass. */
4849 if (!relax_again && link_info.need_relax_finalize)
4851 link_info.need_relax_finalize = FALSE;
4855 while (relax_again);
4857 /* Final extra sizing to report errors. */
4858 lang_do_assignments (statement_list.head, abs_output_section, NULL, 0);
4859 lang_reset_memory_regions ();
4860 lang_size_sections (statement_list.head, abs_output_section,
4861 &statement_list.head, 0, 0, NULL, TRUE);
4864 /* See if anything special should be done now we know how big
4866 ldemul_after_allocation ();
4868 /* Fix any .startof. or .sizeof. symbols. */
4869 lang_set_startof ();
4871 /* Do all the assignments, now that we know the final resting places
4872 of all the symbols. */
4874 lang_do_assignments (statement_list.head, abs_output_section, NULL, 0);
4876 /* Make sure that the section addresses make sense. */
4877 if (! link_info.relocatable
4878 && command_line.check_section_addresses)
4879 lang_check_section_addresses ();
4887 /* EXPORTED TO YACC */
4890 lang_add_wild (struct wildcard_spec *filespec,
4891 struct wildcard_list *section_list,
4892 bfd_boolean keep_sections)
4894 struct wildcard_list *curr, *next;
4895 lang_wild_statement_type *new;
4897 /* Reverse the list as the parser puts it back to front. */
4898 for (curr = section_list, section_list = NULL;
4900 section_list = curr, curr = next)
4902 if (curr->spec.name != NULL && strcmp (curr->spec.name, "COMMON") == 0)
4903 placed_commons = TRUE;
4906 curr->next = section_list;
4909 if (filespec != NULL && filespec->name != NULL)
4911 if (strcmp (filespec->name, "*") == 0)
4912 filespec->name = NULL;
4913 else if (! wildcardp (filespec->name))
4914 lang_has_input_file = TRUE;
4917 new = new_stat (lang_wild_statement, stat_ptr);
4918 new->filename = NULL;
4919 new->filenames_sorted = FALSE;
4920 if (filespec != NULL)
4922 new->filename = filespec->name;
4923 new->filenames_sorted = filespec->sorted == by_name;
4925 new->section_list = section_list;
4926 new->keep_sections = keep_sections;
4927 lang_list_init (&new->children);
4931 lang_section_start (const char *name, etree_type *address,
4932 const segment_type *segment)
4934 lang_address_statement_type *ad;
4936 ad = new_stat (lang_address_statement, stat_ptr);
4937 ad->section_name = name;
4938 ad->address = address;
4939 ad->segment = segment;
4942 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
4943 because of a -e argument on the command line, or zero if this is
4944 called by ENTRY in a linker script. Command line arguments take
4948 lang_add_entry (const char *name, bfd_boolean cmdline)
4950 if (entry_symbol.name == NULL
4952 || ! entry_from_cmdline)
4954 entry_symbol.name = name;
4955 entry_from_cmdline = cmdline;
4960 lang_add_target (const char *name)
4962 lang_target_statement_type *new = new_stat (lang_target_statement,
4970 lang_add_map (const char *name)
4977 map_option_f = TRUE;
4985 lang_add_fill (fill_type *fill)
4987 lang_fill_statement_type *new = new_stat (lang_fill_statement,
4994 lang_add_data (int type, union etree_union *exp)
4997 lang_data_statement_type *new = new_stat (lang_data_statement,
5005 /* Create a new reloc statement. RELOC is the BFD relocation type to
5006 generate. HOWTO is the corresponding howto structure (we could
5007 look this up, but the caller has already done so). SECTION is the
5008 section to generate a reloc against, or NAME is the name of the
5009 symbol to generate a reloc against. Exactly one of SECTION and
5010 NAME must be NULL. ADDEND is an expression for the addend. */
5013 lang_add_reloc (bfd_reloc_code_real_type reloc,
5014 reloc_howto_type *howto,
5017 union etree_union *addend)
5019 lang_reloc_statement_type *p = new_stat (lang_reloc_statement, stat_ptr);
5023 p->section = section;
5025 p->addend_exp = addend;
5027 p->addend_value = 0;
5028 p->output_section = NULL;
5032 lang_assignment_statement_type *
5033 lang_add_assignment (etree_type *exp)
5035 lang_assignment_statement_type *new = new_stat (lang_assignment_statement,
5043 lang_add_attribute (enum statement_enum attribute)
5045 new_statement (attribute, sizeof (lang_statement_union_type), stat_ptr);
5049 lang_startup (const char *name)
5051 if (startup_file != NULL)
5053 einfo (_("%P%Fmultiple STARTUP files\n"));
5055 first_file->filename = name;
5056 first_file->local_sym_name = name;
5057 first_file->real = TRUE;
5059 startup_file = name;
5063 lang_float (bfd_boolean maybe)
5065 lang_float_flag = maybe;
5069 /* Work out the load- and run-time regions from a script statement, and
5070 store them in *LMA_REGION and *REGION respectively.
5072 MEMSPEC is the name of the run-time region, or the value of
5073 DEFAULT_MEMORY_REGION if the statement didn't specify one.
5074 LMA_MEMSPEC is the name of the load-time region, or null if the
5075 statement didn't specify one.HAVE_LMA_P is TRUE if the statement
5076 had an explicit load address.
5078 It is an error to specify both a load region and a load address. */
5081 lang_get_regions (lang_memory_region_type **region,
5082 lang_memory_region_type **lma_region,
5083 const char *memspec,
5084 const char *lma_memspec,
5085 bfd_boolean have_lma,
5086 bfd_boolean have_vma)
5088 *lma_region = lang_memory_region_lookup (lma_memspec, FALSE);
5090 /* If no runtime region or VMA has been specified, but the load region
5091 has been specified, then use the load region for the runtime region
5093 if (lma_memspec != NULL
5095 && strcmp (memspec, DEFAULT_MEMORY_REGION) == 0)
5096 *region = *lma_region;
5098 *region = lang_memory_region_lookup (memspec, FALSE);
5100 if (have_lma && lma_memspec != 0)
5101 einfo (_("%X%P:%S: section has both a load address and a load region\n"));
5105 lang_leave_output_section_statement (fill_type *fill, const char *memspec,
5106 lang_output_section_phdr_list *phdrs,
5107 const char *lma_memspec)
5109 lang_get_regions (¤t_section->region,
5110 ¤t_section->lma_region,
5111 memspec, lma_memspec,
5112 current_section->load_base != NULL,
5113 current_section->addr_tree != NULL);
5114 current_section->fill = fill;
5115 current_section->phdrs = phdrs;
5116 stat_ptr = &statement_list;
5119 /* Create an absolute symbol with the given name with the value of the
5120 address of first byte of the section named.
5122 If the symbol already exists, then do nothing. */
5125 lang_abs_symbol_at_beginning_of (const char *secname, const char *name)
5127 struct bfd_link_hash_entry *h;
5129 h = bfd_link_hash_lookup (link_info.hash, name, TRUE, TRUE, TRUE);
5131 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5133 if (h->type == bfd_link_hash_new
5134 || h->type == bfd_link_hash_undefined)
5138 h->type = bfd_link_hash_defined;
5140 sec = bfd_get_section_by_name (output_bfd, secname);
5144 h->u.def.value = bfd_get_section_vma (output_bfd, sec);
5146 h->u.def.section = bfd_abs_section_ptr;
5150 /* Create an absolute symbol with the given name with the value of the
5151 address of the first byte after the end of the section named.
5153 If the symbol already exists, then do nothing. */
5156 lang_abs_symbol_at_end_of (const char *secname, const char *name)
5158 struct bfd_link_hash_entry *h;
5160 h = bfd_link_hash_lookup (link_info.hash, name, TRUE, TRUE, TRUE);
5162 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5164 if (h->type == bfd_link_hash_new
5165 || h->type == bfd_link_hash_undefined)
5169 h->type = bfd_link_hash_defined;
5171 sec = bfd_get_section_by_name (output_bfd, secname);
5175 h->u.def.value = (bfd_get_section_vma (output_bfd, sec)
5176 + TO_ADDR (sec->size));
5178 h->u.def.section = bfd_abs_section_ptr;
5183 lang_statement_append (lang_statement_list_type *list,
5184 lang_statement_union_type *element,
5185 lang_statement_union_type **field)
5187 *(list->tail) = element;
5191 /* Set the output format type. -oformat overrides scripts. */
5194 lang_add_output_format (const char *format,
5199 if (output_target == NULL || !from_script)
5201 if (command_line.endian == ENDIAN_BIG
5204 else if (command_line.endian == ENDIAN_LITTLE
5208 output_target = format;
5212 /* Enter a group. This creates a new lang_group_statement, and sets
5213 stat_ptr to build new statements within the group. */
5216 lang_enter_group (void)
5218 lang_group_statement_type *g;
5220 g = new_stat (lang_group_statement, stat_ptr);
5221 lang_list_init (&g->children);
5222 stat_ptr = &g->children;
5225 /* Leave a group. This just resets stat_ptr to start writing to the
5226 regular list of statements again. Note that this will not work if
5227 groups can occur inside anything else which can adjust stat_ptr,
5228 but currently they can't. */
5231 lang_leave_group (void)
5233 stat_ptr = &statement_list;
5236 /* Add a new program header. This is called for each entry in a PHDRS
5237 command in a linker script. */
5240 lang_new_phdr (const char *name,
5242 bfd_boolean filehdr,
5247 struct lang_phdr *n, **pp;
5249 n = stat_alloc (sizeof (struct lang_phdr));
5252 n->type = exp_get_value_int (type, 0, "program header type",
5253 lang_final_phase_enum);
5254 n->filehdr = filehdr;
5259 for (pp = &lang_phdr_list; *pp != NULL; pp = &(*pp)->next)
5264 /* Record the program header information in the output BFD. FIXME: We
5265 should not be calling an ELF specific function here. */
5268 lang_record_phdrs (void)
5272 lang_output_section_phdr_list *last;
5273 struct lang_phdr *l;
5274 lang_output_section_statement_type *os;
5277 secs = xmalloc (alc * sizeof (asection *));
5279 for (l = lang_phdr_list; l != NULL; l = l->next)
5286 for (os = &lang_output_section_statement.head->output_section_statement;
5290 lang_output_section_phdr_list *pl;
5292 if (os->constraint == -1)
5300 if (os->sectype == noload_section
5301 || os->bfd_section == NULL
5302 || (os->bfd_section->flags & SEC_ALLOC) == 0)
5307 if (os->bfd_section == NULL)
5310 for (; pl != NULL; pl = pl->next)
5312 if (strcmp (pl->name, l->name) == 0)
5317 secs = xrealloc (secs, alc * sizeof (asection *));
5319 secs[c] = os->bfd_section;
5326 if (l->flags == NULL)
5329 flags = exp_get_vma (l->flags, 0, "phdr flags",
5330 lang_final_phase_enum);
5335 at = exp_get_vma (l->at, 0, "phdr load address",
5336 lang_final_phase_enum);
5338 if (! bfd_record_phdr (output_bfd, l->type,
5339 l->flags != NULL, flags, l->at != NULL,
5340 at, l->filehdr, l->phdrs, c, secs))
5341 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
5346 /* Make sure all the phdr assignments succeeded. */
5347 for (os = &lang_output_section_statement.head->output_section_statement;
5351 lang_output_section_phdr_list *pl;
5353 if (os->constraint == -1
5354 || os->bfd_section == NULL)
5357 for (pl = os->phdrs;
5360 if (! pl->used && strcmp (pl->name, "NONE") != 0)
5361 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
5362 os->name, pl->name);
5366 /* Record a list of sections which may not be cross referenced. */
5369 lang_add_nocrossref (lang_nocrossref_type *l)
5371 struct lang_nocrossrefs *n;
5373 n = xmalloc (sizeof *n);
5374 n->next = nocrossref_list;
5376 nocrossref_list = n;
5378 /* Set notice_all so that we get informed about all symbols. */
5379 link_info.notice_all = TRUE;
5382 /* Overlay handling. We handle overlays with some static variables. */
5384 /* The overlay virtual address. */
5385 static etree_type *overlay_vma;
5386 /* And subsection alignment. */
5387 static etree_type *overlay_subalign;
5389 /* An expression for the maximum section size seen so far. */
5390 static etree_type *overlay_max;
5392 /* A list of all the sections in this overlay. */
5394 struct overlay_list {
5395 struct overlay_list *next;
5396 lang_output_section_statement_type *os;
5399 static struct overlay_list *overlay_list;
5401 /* Start handling an overlay. */
5404 lang_enter_overlay (etree_type *vma_expr, etree_type *subalign)
5406 /* The grammar should prevent nested overlays from occurring. */
5407 ASSERT (overlay_vma == NULL
5408 && overlay_subalign == NULL
5409 && overlay_max == NULL);
5411 overlay_vma = vma_expr;
5412 overlay_subalign = subalign;
5415 /* Start a section in an overlay. We handle this by calling
5416 lang_enter_output_section_statement with the correct VMA.
5417 lang_leave_overlay sets up the LMA and memory regions. */
5420 lang_enter_overlay_section (const char *name)
5422 struct overlay_list *n;
5425 lang_enter_output_section_statement (name, overlay_vma, normal_section,
5426 0, overlay_subalign, 0, 0);
5428 /* If this is the first section, then base the VMA of future
5429 sections on this one. This will work correctly even if `.' is
5430 used in the addresses. */
5431 if (overlay_list == NULL)
5432 overlay_vma = exp_nameop (ADDR, name);
5434 /* Remember the section. */
5435 n = xmalloc (sizeof *n);
5436 n->os = current_section;
5437 n->next = overlay_list;
5440 size = exp_nameop (SIZEOF, name);
5442 /* Arrange to work out the maximum section end address. */
5443 if (overlay_max == NULL)
5446 overlay_max = exp_binop (MAX_K, overlay_max, size);
5449 /* Finish a section in an overlay. There isn't any special to do
5453 lang_leave_overlay_section (fill_type *fill,
5454 lang_output_section_phdr_list *phdrs)
5461 name = current_section->name;
5463 /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory
5464 region and that no load-time region has been specified. It doesn't
5465 really matter what we say here, since lang_leave_overlay will
5467 lang_leave_output_section_statement (fill, DEFAULT_MEMORY_REGION, phdrs, 0);
5469 /* Define the magic symbols. */
5471 clean = xmalloc (strlen (name) + 1);
5473 for (s1 = name; *s1 != '\0'; s1++)
5474 if (ISALNUM (*s1) || *s1 == '_')
5478 buf = xmalloc (strlen (clean) + sizeof "__load_start_");
5479 sprintf (buf, "__load_start_%s", clean);
5480 lang_add_assignment (exp_assop ('=', buf,
5481 exp_nameop (LOADADDR, name)));
5483 buf = xmalloc (strlen (clean) + sizeof "__load_stop_");
5484 sprintf (buf, "__load_stop_%s", clean);
5485 lang_add_assignment (exp_assop ('=', buf,
5487 exp_nameop (LOADADDR, name),
5488 exp_nameop (SIZEOF, name))));
5493 /* Finish an overlay. If there are any overlay wide settings, this
5494 looks through all the sections in the overlay and sets them. */
5497 lang_leave_overlay (etree_type *lma_expr,
5500 const char *memspec,
5501 lang_output_section_phdr_list *phdrs,
5502 const char *lma_memspec)
5504 lang_memory_region_type *region;
5505 lang_memory_region_type *lma_region;
5506 struct overlay_list *l;
5507 lang_nocrossref_type *nocrossref;
5509 lang_get_regions (®ion, &lma_region,
5510 memspec, lma_memspec,
5511 lma_expr != NULL, FALSE);
5515 /* After setting the size of the last section, set '.' to end of the
5517 if (overlay_list != NULL)
5518 overlay_list->os->update_dot_tree
5519 = exp_assop ('=', ".", exp_binop ('+', overlay_vma, overlay_max));
5524 struct overlay_list *next;
5526 if (fill != NULL && l->os->fill == NULL)
5529 l->os->region = region;
5530 l->os->lma_region = lma_region;
5532 /* The first section has the load address specified in the
5533 OVERLAY statement. The rest are worked out from that.
5534 The base address is not needed (and should be null) if
5535 an LMA region was specified. */
5537 l->os->load_base = lma_expr;
5538 else if (lma_region == 0)
5539 l->os->load_base = exp_binop ('+',
5540 exp_nameop (LOADADDR, l->next->os->name),
5541 exp_nameop (SIZEOF, l->next->os->name));
5543 if (phdrs != NULL && l->os->phdrs == NULL)
5544 l->os->phdrs = phdrs;
5548 lang_nocrossref_type *nc;
5550 nc = xmalloc (sizeof *nc);
5551 nc->name = l->os->name;
5552 nc->next = nocrossref;
5561 if (nocrossref != NULL)
5562 lang_add_nocrossref (nocrossref);
5565 overlay_list = NULL;
5569 /* Version handling. This is only useful for ELF. */
5571 /* This global variable holds the version tree that we build. */
5573 struct bfd_elf_version_tree *lang_elf_version_info;
5575 /* If PREV is NULL, return first version pattern matching particular symbol.
5576 If PREV is non-NULL, return first version pattern matching particular
5577 symbol after PREV (previously returned by lang_vers_match). */
5579 static struct bfd_elf_version_expr *
5580 lang_vers_match (struct bfd_elf_version_expr_head *head,
5581 struct bfd_elf_version_expr *prev,
5584 const char *cxx_sym = sym;
5585 const char *java_sym = sym;
5586 struct bfd_elf_version_expr *expr = NULL;
5588 if (head->mask & BFD_ELF_VERSION_CXX_TYPE)
5590 cxx_sym = cplus_demangle (sym, DMGL_PARAMS | DMGL_ANSI);
5594 if (head->mask & BFD_ELF_VERSION_JAVA_TYPE)
5596 java_sym = cplus_demangle (sym, DMGL_JAVA);
5601 if (head->htab && (prev == NULL || prev->symbol))
5603 struct bfd_elf_version_expr e;
5605 switch (prev ? prev->mask : 0)
5608 if (head->mask & BFD_ELF_VERSION_C_TYPE)
5611 expr = htab_find (head->htab, &e);
5612 while (expr && strcmp (expr->symbol, sym) == 0)
5613 if (expr->mask == BFD_ELF_VERSION_C_TYPE)
5619 case BFD_ELF_VERSION_C_TYPE:
5620 if (head->mask & BFD_ELF_VERSION_CXX_TYPE)
5623 expr = htab_find (head->htab, &e);
5624 while (expr && strcmp (expr->symbol, cxx_sym) == 0)
5625 if (expr->mask == BFD_ELF_VERSION_CXX_TYPE)
5631 case BFD_ELF_VERSION_CXX_TYPE:
5632 if (head->mask & BFD_ELF_VERSION_JAVA_TYPE)
5634 e.symbol = java_sym;
5635 expr = htab_find (head->htab, &e);
5636 while (expr && strcmp (expr->symbol, java_sym) == 0)
5637 if (expr->mask == BFD_ELF_VERSION_JAVA_TYPE)
5648 /* Finally, try the wildcards. */
5649 if (prev == NULL || prev->symbol)
5650 expr = head->remaining;
5657 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
5660 if (expr->mask == BFD_ELF_VERSION_JAVA_TYPE)
5662 else if (expr->mask == BFD_ELF_VERSION_CXX_TYPE)
5666 if (fnmatch (expr->pattern, s, 0) == 0)
5673 free ((char *) cxx_sym);
5674 if (java_sym != sym)
5675 free ((char *) java_sym);
5679 /* Return NULL if the PATTERN argument is a glob pattern, otherwise,
5680 return a string pointing to the symbol name. */
5683 realsymbol (const char *pattern)
5686 bfd_boolean changed = FALSE, backslash = FALSE;
5687 char *s, *symbol = xmalloc (strlen (pattern) + 1);
5689 for (p = pattern, s = symbol; *p != '\0'; ++p)
5691 /* It is a glob pattern only if there is no preceding
5693 if (! backslash && (*p == '?' || *p == '*' || *p == '['))
5701 /* Remove the preceding backslash. */
5708 backslash = *p == '\\';
5723 /* This is called for each variable name or match expression. */
5725 struct bfd_elf_version_expr *
5726 lang_new_vers_pattern (struct bfd_elf_version_expr *orig,
5730 struct bfd_elf_version_expr *ret;
5732 ret = xmalloc (sizeof *ret);
5737 ret->symbol = realsymbol (new);
5739 if (lang == NULL || strcasecmp (lang, "C") == 0)
5740 ret->mask = BFD_ELF_VERSION_C_TYPE;
5741 else if (strcasecmp (lang, "C++") == 0)
5742 ret->mask = BFD_ELF_VERSION_CXX_TYPE;
5743 else if (strcasecmp (lang, "Java") == 0)
5744 ret->mask = BFD_ELF_VERSION_JAVA_TYPE;
5747 einfo (_("%X%P: unknown language `%s' in version information\n"),
5749 ret->mask = BFD_ELF_VERSION_C_TYPE;
5752 return ldemul_new_vers_pattern (ret);
5755 /* This is called for each set of variable names and match
5758 struct bfd_elf_version_tree *
5759 lang_new_vers_node (struct bfd_elf_version_expr *globals,
5760 struct bfd_elf_version_expr *locals)
5762 struct bfd_elf_version_tree *ret;
5764 ret = xcalloc (1, sizeof *ret);
5765 ret->globals.list = globals;
5766 ret->locals.list = locals;
5767 ret->match = lang_vers_match;
5768 ret->name_indx = (unsigned int) -1;
5772 /* This static variable keeps track of version indices. */
5774 static int version_index;
5777 version_expr_head_hash (const void *p)
5779 const struct bfd_elf_version_expr *e = p;
5781 return htab_hash_string (e->symbol);
5785 version_expr_head_eq (const void *p1, const void *p2)
5787 const struct bfd_elf_version_expr *e1 = p1;
5788 const struct bfd_elf_version_expr *e2 = p2;
5790 return strcmp (e1->symbol, e2->symbol) == 0;
5794 lang_finalize_version_expr_head (struct bfd_elf_version_expr_head *head)
5797 struct bfd_elf_version_expr *e, *next;
5798 struct bfd_elf_version_expr **list_loc, **remaining_loc;
5800 for (e = head->list; e; e = e->next)
5804 head->mask |= e->mask;
5809 head->htab = htab_create (count * 2, version_expr_head_hash,
5810 version_expr_head_eq, NULL);
5811 list_loc = &head->list;
5812 remaining_loc = &head->remaining;
5813 for (e = head->list; e; e = next)
5819 remaining_loc = &e->next;
5823 void **loc = htab_find_slot (head->htab, e, INSERT);
5827 struct bfd_elf_version_expr *e1, *last;
5833 if (e1->mask == e->mask)
5841 while (e1 && strcmp (e1->symbol, e->symbol) == 0);
5845 /* This is a duplicate. */
5846 /* FIXME: Memory leak. Sometimes pattern is not
5847 xmalloced alone, but in larger chunk of memory. */
5848 /* free (e->symbol); */
5853 e->next = last->next;
5861 list_loc = &e->next;
5865 *remaining_loc = NULL;
5866 *list_loc = head->remaining;
5869 head->remaining = head->list;
5872 /* This is called when we know the name and dependencies of the
5876 lang_register_vers_node (const char *name,
5877 struct bfd_elf_version_tree *version,
5878 struct bfd_elf_version_deps *deps)
5880 struct bfd_elf_version_tree *t, **pp;
5881 struct bfd_elf_version_expr *e1;
5886 if ((name[0] == '\0' && lang_elf_version_info != NULL)
5887 || (lang_elf_version_info && lang_elf_version_info->name[0] == '\0'))
5889 einfo (_("%X%P: anonymous version tag cannot be combined"
5890 " with other version tags\n"));
5895 /* Make sure this node has a unique name. */
5896 for (t = lang_elf_version_info; t != NULL; t = t->next)
5897 if (strcmp (t->name, name) == 0)
5898 einfo (_("%X%P: duplicate version tag `%s'\n"), name);
5900 lang_finalize_version_expr_head (&version->globals);
5901 lang_finalize_version_expr_head (&version->locals);
5903 /* Check the global and local match names, and make sure there
5904 aren't any duplicates. */
5906 for (e1 = version->globals.list; e1 != NULL; e1 = e1->next)
5908 for (t = lang_elf_version_info; t != NULL; t = t->next)
5910 struct bfd_elf_version_expr *e2;
5912 if (t->locals.htab && e1->symbol)
5914 e2 = htab_find (t->locals.htab, e1);
5915 while (e2 && strcmp (e1->symbol, e2->symbol) == 0)
5917 if (e1->mask == e2->mask)
5918 einfo (_("%X%P: duplicate expression `%s'"
5919 " in version information\n"), e1->symbol);
5923 else if (!e1->symbol)
5924 for (e2 = t->locals.remaining; e2 != NULL; e2 = e2->next)
5925 if (strcmp (e1->pattern, e2->pattern) == 0
5926 && e1->mask == e2->mask)
5927 einfo (_("%X%P: duplicate expression `%s'"
5928 " in version information\n"), e1->pattern);
5932 for (e1 = version->locals.list; e1 != NULL; e1 = e1->next)
5934 for (t = lang_elf_version_info; t != NULL; t = t->next)
5936 struct bfd_elf_version_expr *e2;
5938 if (t->globals.htab && e1->symbol)
5940 e2 = htab_find (t->globals.htab, e1);
5941 while (e2 && strcmp (e1->symbol, e2->symbol) == 0)
5943 if (e1->mask == e2->mask)
5944 einfo (_("%X%P: duplicate expression `%s'"
5945 " in version information\n"),
5950 else if (!e1->symbol)
5951 for (e2 = t->globals.remaining; e2 != NULL; e2 = e2->next)
5952 if (strcmp (e1->pattern, e2->pattern) == 0
5953 && e1->mask == e2->mask)
5954 einfo (_("%X%P: duplicate expression `%s'"
5955 " in version information\n"), e1->pattern);
5959 version->deps = deps;
5960 version->name = name;
5961 if (name[0] != '\0')
5964 version->vernum = version_index;
5967 version->vernum = 0;
5969 for (pp = &lang_elf_version_info; *pp != NULL; pp = &(*pp)->next)
5974 /* This is called when we see a version dependency. */
5976 struct bfd_elf_version_deps *
5977 lang_add_vers_depend (struct bfd_elf_version_deps *list, const char *name)
5979 struct bfd_elf_version_deps *ret;
5980 struct bfd_elf_version_tree *t;
5982 ret = xmalloc (sizeof *ret);
5985 for (t = lang_elf_version_info; t != NULL; t = t->next)
5987 if (strcmp (t->name, name) == 0)
5989 ret->version_needed = t;
5994 einfo (_("%X%P: unable to find version dependency `%s'\n"), name);
6000 lang_do_version_exports_section (void)
6002 struct bfd_elf_version_expr *greg = NULL, *lreg;
6004 LANG_FOR_EACH_INPUT_STATEMENT (is)
6006 asection *sec = bfd_get_section_by_name (is->the_bfd, ".exports");
6014 contents = xmalloc (len);
6015 if (!bfd_get_section_contents (is->the_bfd, sec, contents, 0, len))
6016 einfo (_("%X%P: unable to read .exports section contents\n"), sec);
6019 while (p < contents + len)
6021 greg = lang_new_vers_pattern (greg, p, NULL);
6022 p = strchr (p, '\0') + 1;
6025 /* Do not free the contents, as we used them creating the regex. */
6027 /* Do not include this section in the link. */
6028 sec->flags |= SEC_EXCLUDE;
6031 lreg = lang_new_vers_pattern (NULL, "*", NULL);
6032 lang_register_vers_node (command_line.version_exports_section,
6033 lang_new_vers_node (greg, lreg), NULL);
6037 lang_add_unique (const char *name)
6039 struct unique_sections *ent;
6041 for (ent = unique_section_list; ent; ent = ent->next)
6042 if (strcmp (ent->name, name) == 0)
6045 ent = xmalloc (sizeof *ent);
6046 ent->name = xstrdup (name);
6047 ent->next = unique_section_list;
6048 unique_section_list = ent;