1 /* Linker command language support.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 Free Software Foundation, Inc.
6 This file is part of GLD, the Gnu Linker.
8 GLD is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GLD is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GLD; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 #include "libiberty.h"
26 #include "safe-ctype.h"
44 static lang_statement_union_type *new_statement
45 PARAMS ((enum statement_enum, size_t, lang_statement_list_type *));
48 static struct obstack stat_obstack;
50 #define obstack_chunk_alloc xmalloc
51 #define obstack_chunk_free free
52 static const char *startup_file;
53 static lang_statement_list_type input_file_chain;
54 static boolean placed_commons = false;
55 static lang_output_section_statement_type *default_common_section;
56 static boolean map_option_f;
57 static bfd_vma print_dot;
58 static lang_input_statement_type *first_file;
59 static const char *current_target;
60 static const char *output_target;
61 static lang_statement_list_type statement_list;
62 static struct lang_phdr *lang_phdr_list;
64 static void lang_for_each_statement_worker
65 PARAMS ((void (*) (lang_statement_union_type *),
66 lang_statement_union_type *));
67 static lang_input_statement_type *new_afile
68 PARAMS ((const char *, lang_input_file_enum_type, const char *, boolean));
69 static lang_memory_region_type *lang_memory_default PARAMS ((asection *));
70 static void lang_map_flags PARAMS ((flagword));
71 static void init_os PARAMS ((lang_output_section_statement_type *));
72 static void exp_init_os PARAMS ((etree_type *));
73 static void section_already_linked PARAMS ((bfd *, asection *, PTR));
74 static struct bfd_hash_entry *already_linked_newfunc
75 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
76 static void already_linked_table_init PARAMS ((void));
77 static void already_linked_table_free PARAMS ((void));
78 static boolean wildcardp PARAMS ((const char *));
79 static lang_statement_union_type *wild_sort
80 PARAMS ((lang_wild_statement_type *, struct wildcard_list *,
81 lang_input_statement_type *, asection *));
82 static void output_section_callback
83 PARAMS ((lang_wild_statement_type *, struct wildcard_list *, asection *,
84 lang_input_statement_type *, PTR));
85 static lang_input_statement_type *lookup_name PARAMS ((const char *));
86 static boolean load_symbols
87 PARAMS ((lang_input_statement_type *, lang_statement_list_type *));
89 PARAMS ((lang_wild_statement_type *,
90 const char *, lang_output_section_statement_type *));
91 static bfd *open_output PARAMS ((const char *));
92 static void ldlang_open_output PARAMS ((lang_statement_union_type *));
93 static void open_input_bfds PARAMS ((lang_statement_union_type *, boolean));
94 static void lang_reasonable_defaults PARAMS ((void));
95 static void insert_undefined PARAMS ((const char *));
96 static void lang_place_undefineds PARAMS ((void));
97 static void map_input_to_output_sections
98 PARAMS ((lang_statement_union_type *, const char *,
99 lang_output_section_statement_type *));
100 static void print_output_section_statement
101 PARAMS ((lang_output_section_statement_type *));
102 static void print_assignment
103 PARAMS ((lang_assignment_statement_type *,
104 lang_output_section_statement_type *));
105 static void print_input_statement PARAMS ((lang_input_statement_type *));
106 static boolean print_one_symbol PARAMS ((struct bfd_link_hash_entry *, PTR));
107 static void print_input_section PARAMS ((lang_input_section_type *));
108 static void print_fill_statement PARAMS ((lang_fill_statement_type *));
109 static void print_data_statement PARAMS ((lang_data_statement_type *));
110 static void print_address_statement PARAMS ((lang_address_statement_type *));
111 static void print_reloc_statement PARAMS ((lang_reloc_statement_type *));
112 static void print_padding_statement PARAMS ((lang_padding_statement_type *));
113 static void print_wild_statement
114 PARAMS ((lang_wild_statement_type *, lang_output_section_statement_type *));
115 static void print_group
116 PARAMS ((lang_group_statement_type *, lang_output_section_statement_type *));
117 static void print_statement
118 PARAMS ((lang_statement_union_type *, lang_output_section_statement_type *));
119 static void print_statement_list
120 PARAMS ((lang_statement_union_type *, lang_output_section_statement_type *));
121 static void print_statements PARAMS ((void));
122 static void insert_pad
123 PARAMS ((lang_statement_union_type **, fill_type *,
124 unsigned int, asection *, bfd_vma));
125 static bfd_vma size_input_section
126 PARAMS ((lang_statement_union_type **, lang_output_section_statement_type *,
127 fill_type *, bfd_vma));
128 static void lang_finish PARAMS ((void));
129 static void ignore_bfd_errors PARAMS ((const char *, ...));
130 static void lang_check PARAMS ((void));
131 static void lang_common PARAMS ((void));
132 static boolean lang_one_common PARAMS ((struct bfd_link_hash_entry *, PTR));
133 static void lang_place_orphans PARAMS ((void));
134 static int topower PARAMS ((int));
135 static void lang_set_startof PARAMS ((void));
136 static void gc_section_callback
137 PARAMS ((lang_wild_statement_type *, struct wildcard_list *, asection *,
138 lang_input_statement_type *, PTR));
139 static void lang_get_regions PARAMS ((struct memory_region_struct **,
140 struct memory_region_struct **,
141 const char *, const char *, int));
142 static void lang_record_phdrs PARAMS ((void));
143 static void lang_gc_wild PARAMS ((lang_wild_statement_type *));
144 static void lang_gc_sections_1 PARAMS ((lang_statement_union_type *));
145 static void lang_gc_sections PARAMS ((void));
146 static int lang_vers_match_lang_c
147 PARAMS ((struct bfd_elf_version_expr *, const char *));
148 static int lang_vers_match_lang_cplusplus
149 PARAMS ((struct bfd_elf_version_expr *, const char *));
150 static int lang_vers_match_lang_java
151 PARAMS ((struct bfd_elf_version_expr *, const char *));
152 static void lang_do_version_exports_section PARAMS ((void));
153 static void lang_check_section_addresses PARAMS ((void));
154 static void os_region_check
155 PARAMS ((lang_output_section_statement_type *,
156 struct memory_region_struct *, etree_type *, bfd_vma));
157 static bfd_vma lang_size_sections_1
158 PARAMS ((lang_statement_union_type *, lang_output_section_statement_type *,
159 lang_statement_union_type **, fill_type *, bfd_vma, boolean *));
161 typedef void (*callback_t) PARAMS ((lang_wild_statement_type *,
162 struct wildcard_list *,
164 lang_input_statement_type *,
166 static void walk_wild
167 PARAMS ((lang_wild_statement_type *, callback_t, PTR));
168 static void walk_wild_section
169 PARAMS ((lang_wild_statement_type *, lang_input_statement_type *,
171 static void walk_wild_file
172 PARAMS ((lang_wild_statement_type *, lang_input_statement_type *,
175 static int get_target PARAMS ((const bfd_target *, PTR));
176 static void stricpy PARAMS ((char *, char *));
177 static void strcut PARAMS ((char *, char *));
178 static int name_compare PARAMS ((char *, char *));
179 static int closest_target_match PARAMS ((const bfd_target *, PTR));
180 static char * get_first_input_target PARAMS ((void));
183 lang_output_section_statement_type *abs_output_section;
184 lang_statement_list_type lang_output_section_statement;
185 lang_statement_list_type *stat_ptr = &statement_list;
186 lang_statement_list_type file_chain = { NULL, NULL };
187 struct bfd_sym_chain entry_symbol = { NULL, NULL };
188 const char *entry_section = ".text";
189 boolean entry_from_cmdline;
190 boolean lang_has_input_file = false;
191 boolean had_output_filename = false;
192 boolean lang_float_flag = false;
193 boolean delete_output_file_on_failure = false;
194 struct lang_nocrossrefs *nocrossref_list;
195 struct unique_sections *unique_section_list;
197 etree_type *base; /* Relocation base - or null */
199 #if defined (__STDC__) || defined (ALMOST_STDC)
200 #define cat(a,b) a##b
202 #define cat(a,b) a/**/b
205 /* Don't beautify the line below with "innocent" whitespace, it breaks
206 the K&R C preprocessor! */
207 #define new_stat(x, y) \
208 (cat (x,_type)*) new_statement (cat (x,_enum), sizeof (cat (x,_type)), y)
210 #define outside_section_address(q) \
211 ((q)->output_offset + (q)->output_section->vma)
213 #define outside_symbol_address(q) \
214 ((q)->value + outside_section_address (q->section))
216 #define SECTION_NAME_MAP_LENGTH (16)
222 return obstack_alloc (&stat_obstack, size);
226 unique_section_p (secnam)
229 struct unique_sections *unam;
231 for (unam = unique_section_list; unam; unam = unam->next)
232 if (wildcardp (unam->name)
233 ? fnmatch (unam->name, secnam, 0) == 0
234 : strcmp (unam->name, secnam) == 0)
242 /* Generic traversal routines for finding matching sections. */
245 walk_wild_section (ptr, file, callback, data)
246 lang_wild_statement_type *ptr;
247 lang_input_statement_type *file;
253 if (file->just_syms_flag)
256 for (s = file->the_bfd->sections; s != NULL; s = s->next)
258 struct wildcard_list *sec;
260 sec = ptr->section_list;
262 (*callback) (ptr, sec, s, file, data);
266 boolean skip = false;
267 struct name_list *list_tmp;
269 /* Don't process sections from files which were
271 for (list_tmp = sec->spec.exclude_name_list;
273 list_tmp = list_tmp->next)
275 if (wildcardp (list_tmp->name))
276 skip = fnmatch (list_tmp->name, file->filename, 0) == 0;
278 skip = strcmp (list_tmp->name, file->filename) == 0;
280 /* If this file is part of an archive, and the archive is
281 excluded, exclude this file. */
282 if (! skip && file->the_bfd != NULL
283 && file->the_bfd->my_archive != NULL
284 && file->the_bfd->my_archive->filename != NULL)
286 if (wildcardp (list_tmp->name))
287 skip = fnmatch (list_tmp->name,
288 file->the_bfd->my_archive->filename,
291 skip = strcmp (list_tmp->name,
292 file->the_bfd->my_archive->filename) == 0;
299 if (!skip && sec->spec.name != NULL)
301 const char *sname = bfd_get_section_name (file->the_bfd, s);
303 if (wildcardp (sec->spec.name))
304 skip = fnmatch (sec->spec.name, sname, 0) != 0;
306 skip = strcmp (sec->spec.name, sname) != 0;
310 (*callback) (ptr, sec, s, file, data);
317 /* Handle a wild statement for a single file F. */
320 walk_wild_file (s, f, callback, data)
321 lang_wild_statement_type *s;
322 lang_input_statement_type *f;
326 if (f->the_bfd == NULL
327 || ! bfd_check_format (f->the_bfd, bfd_archive))
328 walk_wild_section (s, f, callback, data);
333 /* This is an archive file. We must map each member of the
334 archive separately. */
335 member = bfd_openr_next_archived_file (f->the_bfd, (bfd *) NULL);
336 while (member != NULL)
338 /* When lookup_name is called, it will call the add_symbols
339 entry point for the archive. For each element of the
340 archive which is included, BFD will call ldlang_add_file,
341 which will set the usrdata field of the member to the
342 lang_input_statement. */
343 if (member->usrdata != NULL)
345 walk_wild_section (s,
346 (lang_input_statement_type *) member->usrdata,
350 member = bfd_openr_next_archived_file (f->the_bfd, member);
356 walk_wild (s, callback, data)
357 lang_wild_statement_type *s;
361 const char *file_spec = s->filename;
363 if (file_spec == NULL)
365 /* Perform the iteration over all files in the list. */
366 LANG_FOR_EACH_INPUT_STATEMENT (f)
368 walk_wild_file (s, f, callback, data);
371 else if (wildcardp (file_spec))
373 LANG_FOR_EACH_INPUT_STATEMENT (f)
375 if (fnmatch (file_spec, f->filename, FNM_FILE_NAME) == 0)
376 walk_wild_file (s, f, callback, data);
381 lang_input_statement_type *f;
383 /* Perform the iteration over a single file. */
384 f = lookup_name (file_spec);
386 walk_wild_file (s, f, callback, data);
390 /* lang_for_each_statement walks the parse tree and calls the provided
391 function for each node. */
394 lang_for_each_statement_worker (func, s)
395 void (*func) PARAMS ((lang_statement_union_type *));
396 lang_statement_union_type *s;
398 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
402 switch (s->header.type)
404 case lang_constructors_statement_enum:
405 lang_for_each_statement_worker (func, constructor_list.head);
407 case lang_output_section_statement_enum:
408 lang_for_each_statement_worker
410 s->output_section_statement.children.head);
412 case lang_wild_statement_enum:
413 lang_for_each_statement_worker
415 s->wild_statement.children.head);
417 case lang_group_statement_enum:
418 lang_for_each_statement_worker (func,
419 s->group_statement.children.head);
421 case lang_data_statement_enum:
422 case lang_reloc_statement_enum:
423 case lang_object_symbols_statement_enum:
424 case lang_output_statement_enum:
425 case lang_target_statement_enum:
426 case lang_input_section_enum:
427 case lang_input_statement_enum:
428 case lang_assignment_statement_enum:
429 case lang_padding_statement_enum:
430 case lang_address_statement_enum:
431 case lang_fill_statement_enum:
441 lang_for_each_statement (func)
442 void (*func) PARAMS ((lang_statement_union_type *));
444 lang_for_each_statement_worker (func, statement_list.head);
447 /*----------------------------------------------------------------------*/
450 lang_list_init (list)
451 lang_statement_list_type *list;
453 list->head = (lang_statement_union_type *) NULL;
454 list->tail = &list->head;
457 /* Build a new statement node for the parse tree. */
459 static lang_statement_union_type *
460 new_statement (type, size, list)
461 enum statement_enum type;
463 lang_statement_list_type *list;
465 lang_statement_union_type *new = (lang_statement_union_type *)
468 new->header.type = type;
469 new->header.next = (lang_statement_union_type *) NULL;
470 lang_statement_append (list, new, &new->header.next);
474 /* Build a new input file node for the language. There are several
475 ways in which we treat an input file, eg, we only look at symbols,
476 or prefix it with a -l etc.
478 We can be supplied with requests for input files more than once;
479 they may, for example be split over serveral lines like foo.o(.text)
480 foo.o(.data) etc, so when asked for a file we check that we haven't
481 got it already so we don't duplicate the bfd. */
483 static lang_input_statement_type *
484 new_afile (name, file_type, target, add_to_list)
486 lang_input_file_enum_type file_type;
490 lang_input_statement_type *p;
493 p = new_stat (lang_input_statement, stat_ptr);
496 p = ((lang_input_statement_type *)
497 stat_alloc (sizeof (lang_input_statement_type)));
498 p->header.next = NULL;
501 lang_has_input_file = true;
505 case lang_input_file_is_symbols_only_enum:
507 p->is_archive = false;
509 p->local_sym_name = name;
510 p->just_syms_flag = true;
511 p->search_dirs_flag = false;
513 case lang_input_file_is_fake_enum:
515 p->is_archive = false;
517 p->local_sym_name = name;
518 p->just_syms_flag = false;
519 p->search_dirs_flag = false;
521 case lang_input_file_is_l_enum:
522 p->is_archive = true;
525 p->local_sym_name = concat ("-l", name, (const char *) NULL);
526 p->just_syms_flag = false;
527 p->search_dirs_flag = true;
529 case lang_input_file_is_marker_enum:
531 p->is_archive = false;
533 p->local_sym_name = name;
534 p->just_syms_flag = false;
535 p->search_dirs_flag = true;
537 case lang_input_file_is_search_file_enum:
539 p->is_archive = false;
541 p->local_sym_name = name;
542 p->just_syms_flag = false;
543 p->search_dirs_flag = true;
545 case lang_input_file_is_file_enum:
547 p->is_archive = false;
549 p->local_sym_name = name;
550 p->just_syms_flag = false;
551 p->search_dirs_flag = false;
556 p->the_bfd = (bfd *) NULL;
557 p->asymbols = (asymbol **) NULL;
558 p->next_real_file = (lang_statement_union_type *) NULL;
559 p->next = (lang_statement_union_type *) NULL;
561 p->dynamic = config.dynamic_link;
562 p->whole_archive = whole_archive;
564 lang_statement_append (&input_file_chain,
565 (lang_statement_union_type *) p,
570 lang_input_statement_type *
571 lang_add_input_file (name, file_type, target)
573 lang_input_file_enum_type file_type;
576 lang_has_input_file = true;
577 return new_afile (name, file_type, target, true);
580 /* Build enough state so that the parser can build its tree. */
585 obstack_begin (&stat_obstack, 1000);
587 stat_ptr = &statement_list;
589 lang_list_init (stat_ptr);
591 lang_list_init (&input_file_chain);
592 lang_list_init (&lang_output_section_statement);
593 lang_list_init (&file_chain);
594 first_file = lang_add_input_file ((char *) NULL,
595 lang_input_file_is_marker_enum,
598 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME);
600 abs_output_section->bfd_section = bfd_abs_section_ptr;
604 /*----------------------------------------------------------------------
605 A region is an area of memory declared with the
606 MEMORY { name:org=exp, len=exp ... }
609 We maintain a list of all the regions here.
611 If no regions are specified in the script, then the default is used
612 which is created when looked up to be the entire data space. */
614 static lang_memory_region_type *lang_memory_region_list;
615 static lang_memory_region_type **lang_memory_region_list_tail = &lang_memory_region_list;
617 lang_memory_region_type *
618 lang_memory_region_lookup (name)
619 const char *const name;
621 lang_memory_region_type *p;
623 /* NAME is NULL for LMA memspecs if no region was specified. */
627 for (p = lang_memory_region_list;
628 p != (lang_memory_region_type *) NULL;
631 if (strcmp (p->name, name) == 0)
638 /* This code used to always use the first region in the list as the
639 default region. I changed it to instead use a region
640 encompassing all of memory as the default region. This permits
641 NOLOAD sections to work reasonably without requiring a region.
642 People should specify what region they mean, if they really want
644 if (strcmp (name, "*default*") == 0)
646 if (lang_memory_region_list != (lang_memory_region_type *) NULL)
648 return lang_memory_region_list;
654 lang_memory_region_type *new =
655 (lang_memory_region_type *) stat_alloc (sizeof (lang_memory_region_type));
657 new->name = xstrdup (name);
658 new->next = (lang_memory_region_type *) NULL;
660 *lang_memory_region_list_tail = new;
661 lang_memory_region_list_tail = &new->next;
665 new->length = ~(bfd_size_type) 0;
667 new->had_full_message = false;
673 static lang_memory_region_type *
674 lang_memory_default (section)
677 lang_memory_region_type *p;
679 flagword sec_flags = section->flags;
681 /* Override SEC_DATA to mean a writable section. */
682 if ((sec_flags & (SEC_ALLOC | SEC_READONLY | SEC_CODE)) == SEC_ALLOC)
683 sec_flags |= SEC_DATA;
685 for (p = lang_memory_region_list;
686 p != (lang_memory_region_type *) NULL;
689 if ((p->flags & sec_flags) != 0
690 && (p->not_flags & sec_flags) == 0)
695 return lang_memory_region_lookup ("*default*");
698 lang_output_section_statement_type *
699 lang_output_section_find (name)
700 const char *const name;
702 lang_statement_union_type *u;
703 lang_output_section_statement_type *lookup;
705 for (u = lang_output_section_statement.head;
706 u != (lang_statement_union_type *) NULL;
709 lookup = &u->output_section_statement;
710 if (strcmp (name, lookup->name) == 0)
715 return (lang_output_section_statement_type *) NULL;
718 lang_output_section_statement_type *
719 lang_output_section_statement_lookup (name)
720 const char *const name;
722 lang_output_section_statement_type *lookup;
724 lookup = lang_output_section_find (name);
725 if (lookup == (lang_output_section_statement_type *) NULL)
728 lookup = (lang_output_section_statement_type *)
729 new_stat (lang_output_section_statement, stat_ptr);
730 lookup->region = (lang_memory_region_type *) NULL;
731 lookup->lma_region = (lang_memory_region_type *) NULL;
732 lookup->fill = (fill_type *) 0;
733 lookup->block_value = 1;
736 lookup->next = (lang_statement_union_type *) NULL;
737 lookup->bfd_section = (asection *) NULL;
738 lookup->processed = false;
739 lookup->sectype = normal_section;
740 lookup->addr_tree = (etree_type *) NULL;
741 lang_list_init (&lookup->children);
743 lookup->memspec = (const char *) NULL;
745 lookup->subsection_alignment = -1;
746 lookup->section_alignment = -1;
747 lookup->load_base = (union etree_union *) NULL;
748 lookup->update_dot_tree = NULL;
749 lookup->phdrs = NULL;
751 lang_statement_append (&lang_output_section_statement,
752 (lang_statement_union_type *) lookup,
759 lang_map_flags (flag)
762 if (flag & SEC_ALLOC)
768 if (flag & SEC_READONLY)
781 lang_memory_region_type *m;
783 minfo (_("\nMemory Configuration\n\n"));
784 fprintf (config.map_file, "%-16s %-18s %-18s %s\n",
785 _("Name"), _("Origin"), _("Length"), _("Attributes"));
787 for (m = lang_memory_region_list;
788 m != (lang_memory_region_type *) NULL;
794 fprintf (config.map_file, "%-16s ", m->name);
796 sprintf_vma (buf, m->origin);
797 minfo ("0x%s ", buf);
805 minfo ("0x%V", m->length);
806 if (m->flags || m->not_flags)
814 lang_map_flags (m->flags);
820 lang_map_flags (m->not_flags);
827 fprintf (config.map_file, _("\nLinker script and memory map\n\n"));
832 /* Initialize an output section. */
836 lang_output_section_statement_type *s;
838 section_userdata_type *new;
840 if (s->bfd_section != NULL)
843 if (strcmp (s->name, DISCARD_SECTION_NAME) == 0)
844 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME);
846 new = ((section_userdata_type *)
847 stat_alloc (sizeof (section_userdata_type)));
849 s->bfd_section = bfd_get_section_by_name (output_bfd, s->name);
850 if (s->bfd_section == (asection *) NULL)
851 s->bfd_section = bfd_make_section (output_bfd, s->name);
852 if (s->bfd_section == (asection *) NULL)
854 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
855 output_bfd->xvec->name, s->name);
857 s->bfd_section->output_section = s->bfd_section;
859 /* We initialize an output sections output offset to minus its own
860 vma to allow us to output a section through itself. */
861 s->bfd_section->output_offset = 0;
862 get_userdata (s->bfd_section) = (PTR) new;
864 /* If there is a base address, make sure that any sections it might
865 mention are initialized. */
866 if (s->addr_tree != NULL)
867 exp_init_os (s->addr_tree);
870 /* Make sure that all output sections mentioned in an expression are
877 switch (exp->type.node_class)
880 exp_init_os (exp->assign.src);
884 exp_init_os (exp->binary.lhs);
885 exp_init_os (exp->binary.rhs);
889 exp_init_os (exp->trinary.cond);
890 exp_init_os (exp->trinary.lhs);
891 exp_init_os (exp->trinary.rhs);
895 exp_init_os (exp->unary.child);
899 switch (exp->type.node_code)
905 lang_output_section_statement_type *os;
907 os = lang_output_section_find (exp->name.name);
908 if (os != NULL && os->bfd_section == NULL)
919 /* Sections marked with the SEC_LINK_ONCE flag should only be linked
920 once into the output. This routine checks each section, and
921 arrange to discard it if a section of the same name has already
922 been linked. If the section has COMDAT information, then it uses
923 that to decide whether the section should be included. This code
924 assumes that all relevant sections have the SEC_LINK_ONCE flag set;
925 that is, it does not depend solely upon the section name.
926 section_already_linked is called via bfd_map_over_sections. */
928 /* This is the shape of the elements inside the already_linked hash
929 table. It maps a name onto a list of already_linked elements with
930 the same name. It's possible to get more than one element in a
931 list if the COMDAT sections have different names. */
933 struct already_linked_hash_entry
935 struct bfd_hash_entry root;
936 struct already_linked *entry;
939 struct already_linked
941 struct already_linked *next;
945 /* The hash table. */
947 static struct bfd_hash_table already_linked_table;
950 section_already_linked (abfd, sec, data)
955 lang_input_statement_type *entry = (lang_input_statement_type *) data;
958 struct already_linked *l;
959 struct already_linked_hash_entry *already_linked_list;
961 /* If we are only reading symbols from this object, then we want to
962 discard all sections. */
963 if (entry->just_syms_flag)
965 bfd_link_just_syms (sec, &link_info);
969 flags = bfd_get_section_flags (abfd, sec);
971 if ((flags & SEC_LINK_ONCE) == 0)
974 /* FIXME: When doing a relocatable link, we may have trouble
975 copying relocations in other sections that refer to local symbols
976 in the section being discarded. Those relocations will have to
977 be converted somehow; as of this writing I'm not sure that any of
978 the backends handle that correctly.
980 It is tempting to instead not discard link once sections when
981 doing a relocatable link (technically, they should be discarded
982 whenever we are building constructors). However, that fails,
983 because the linker winds up combining all the link once sections
984 into a single large link once section, which defeats the purpose
985 of having link once sections in the first place.
987 Also, not merging link once sections in a relocatable link
988 causes trouble for MIPS ELF, which relies on link once semantics
989 to handle the .reginfo section correctly. */
991 name = bfd_get_section_name (abfd, sec);
993 already_linked_list =
994 ((struct already_linked_hash_entry *)
995 bfd_hash_lookup (&already_linked_table, name, true, false));
997 for (l = already_linked_list->entry; l != NULL; l = l->next)
999 if (sec->comdat == NULL
1000 || l->sec->comdat == NULL
1001 || strcmp (sec->comdat->name, l->sec->comdat->name) == 0)
1003 /* The section has already been linked. See if we should
1005 switch (flags & SEC_LINK_DUPLICATES)
1010 case SEC_LINK_DUPLICATES_DISCARD:
1013 case SEC_LINK_DUPLICATES_ONE_ONLY:
1014 if (sec->comdat == NULL)
1015 einfo (_("%P: %B: warning: ignoring duplicate section `%s'\n"),
1018 einfo (_("%P: %B: warning: ignoring duplicate `%s' section symbol `%s'\n"),
1019 abfd, name, sec->comdat->name);
1022 case SEC_LINK_DUPLICATES_SAME_CONTENTS:
1023 /* FIXME: We should really dig out the contents of both
1024 sections and memcmp them. The COFF/PE spec says that
1025 the Microsoft linker does not implement this
1026 correctly, so I'm not going to bother doing it
1029 case SEC_LINK_DUPLICATES_SAME_SIZE:
1030 if (bfd_section_size (abfd, sec)
1031 != bfd_section_size (l->sec->owner, l->sec))
1032 einfo (_("%P: %B: warning: duplicate section `%s' has different size\n"),
1037 /* Set the output_section field so that lang_add_section
1038 does not create a lang_input_section structure for this
1040 sec->output_section = bfd_abs_section_ptr;
1042 if (flags & SEC_GROUP)
1043 bfd_discard_group (abfd, sec);
1049 /* This is the first section with this name. Record it. Allocate
1050 the memory from the same obstack as the hash table is kept in. */
1052 l = ((struct already_linked *)
1053 bfd_hash_allocate (&already_linked_table, sizeof *l));
1056 l->next = already_linked_list->entry;
1057 already_linked_list->entry = l;
1060 /* Support routines for the hash table used by section_already_linked,
1061 initialize the table, fill in an entry and remove the table. */
1063 static struct bfd_hash_entry *
1064 already_linked_newfunc (entry, table, string)
1065 struct bfd_hash_entry *entry ATTRIBUTE_UNUSED;
1066 struct bfd_hash_table *table;
1067 const char *string ATTRIBUTE_UNUSED;
1069 struct already_linked_hash_entry *ret =
1070 bfd_hash_allocate (table, sizeof (struct already_linked_hash_entry));
1074 return (struct bfd_hash_entry *) ret;
1078 already_linked_table_init ()
1080 if (! bfd_hash_table_init_n (&already_linked_table,
1081 already_linked_newfunc,
1083 einfo (_("%P%F: Failed to create hash table\n"));
1087 already_linked_table_free ()
1089 bfd_hash_table_free (&already_linked_table);
1092 /* The wild routines.
1094 These expand statements like *(.text) and foo.o to a list of
1095 explicit actions, like foo.o(.text), bar.o(.text) and
1096 foo.o(.text, .data). */
1098 /* Return true if the PATTERN argument is a wildcard pattern.
1099 Although backslashes are treated specially if a pattern contains
1100 wildcards, we do not consider the mere presence of a backslash to
1101 be enough to cause the pattern to be treated as a wildcard.
1102 That lets us handle DOS filenames more naturally. */
1106 const char *pattern;
1110 for (s = pattern; *s != '\0'; ++s)
1118 /* Add SECTION to the output section OUTPUT. Do this by creating a
1119 lang_input_section statement which is placed at PTR. FILE is the
1120 input file which holds SECTION. */
1123 lang_add_section (ptr, section, output, file)
1124 lang_statement_list_type *ptr;
1126 lang_output_section_statement_type *output;
1127 lang_input_statement_type *file;
1132 flags = bfd_get_section_flags (section->owner, section);
1136 /* If we are doing a final link, discard sections marked with
1138 if (! link_info.relocateable
1139 && (flags & SEC_EXCLUDE) != 0)
1142 /* Discard input sections which are assigned to a section named
1143 DISCARD_SECTION_NAME. */
1144 if (strcmp (output->name, DISCARD_SECTION_NAME) == 0)
1147 /* Discard debugging sections if we are stripping debugging
1149 if ((link_info.strip == strip_debugger || link_info.strip == strip_all)
1150 && (flags & SEC_DEBUGGING) != 0)
1155 if (section->output_section == NULL)
1157 /* This prevents future calls from assigning this section. */
1158 section->output_section = bfd_abs_section_ptr;
1163 if (section->output_section == NULL)
1166 lang_input_section_type *new;
1169 if (output->bfd_section == NULL)
1172 first = ! output->bfd_section->linker_has_input;
1173 output->bfd_section->linker_has_input = 1;
1175 /* Add a section reference to the list. */
1176 new = new_stat (lang_input_section, ptr);
1178 new->section = section;
1180 section->output_section = output->bfd_section;
1182 flags = section->flags;
1184 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1185 to an output section, because we want to be able to include a
1186 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1187 section (I don't know why we want to do this, but we do).
1188 build_link_order in ldwrite.c handles this case by turning
1189 the embedded SEC_NEVER_LOAD section into a fill. */
1191 flags &= ~ SEC_NEVER_LOAD;
1193 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1194 already been processed. One reason to do this is that on pe
1195 format targets, .text$foo sections go into .text and it's odd
1196 to see .text with SEC_LINK_ONCE set. */
1198 if (! link_info.relocateable)
1199 flags &= ~ (SEC_LINK_ONCE | SEC_LINK_DUPLICATES);
1201 /* If this is not the first input section, and the SEC_READONLY
1202 flag is not currently set, then don't set it just because the
1203 input section has it set. */
1205 if (! first && (section->output_section->flags & SEC_READONLY) == 0)
1206 flags &= ~ SEC_READONLY;
1208 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1210 && ((section->output_section->flags & (SEC_MERGE | SEC_STRINGS))
1211 != (flags & (SEC_MERGE | SEC_STRINGS))
1212 || ((flags & SEC_MERGE)
1213 && section->output_section->entsize != section->entsize)))
1215 section->output_section->flags &= ~ (SEC_MERGE | SEC_STRINGS);
1216 flags &= ~ (SEC_MERGE | SEC_STRINGS);
1219 /* For now make .tbss normal section. */
1220 if (flags & SEC_THREAD_LOCAL)
1223 section->output_section->flags |= flags;
1225 if (flags & SEC_MERGE)
1226 section->output_section->entsize = section->entsize;
1228 /* If SEC_READONLY is not set in the input section, then clear
1229 it from the output section. */
1230 if ((section->flags & SEC_READONLY) == 0)
1231 section->output_section->flags &= ~SEC_READONLY;
1233 switch (output->sectype)
1235 case normal_section:
1240 case overlay_section:
1241 output->bfd_section->flags &= ~SEC_ALLOC;
1243 case noload_section:
1244 output->bfd_section->flags &= ~SEC_LOAD;
1245 output->bfd_section->flags |= SEC_NEVER_LOAD;
1249 /* Copy over SEC_SMALL_DATA. */
1250 if (section->flags & SEC_SMALL_DATA)
1251 section->output_section->flags |= SEC_SMALL_DATA;
1253 if (section->alignment_power > output->bfd_section->alignment_power)
1254 output->bfd_section->alignment_power = section->alignment_power;
1256 /* If supplied an aligment, then force it. */
1257 if (output->section_alignment != -1)
1258 output->bfd_section->alignment_power = output->section_alignment;
1260 if (section->flags & SEC_BLOCK)
1262 section->output_section->flags |= SEC_BLOCK;
1263 /* FIXME: This value should really be obtained from the bfd... */
1264 output->block_value = 128;
1269 /* Handle wildcard sorting. This returns the lang_input_section which
1270 should follow the one we are going to create for SECTION and FILE,
1271 based on the sorting requirements of WILD. It returns NULL if the
1272 new section should just go at the end of the current list. */
1274 static lang_statement_union_type *
1275 wild_sort (wild, sec, file, section)
1276 lang_wild_statement_type *wild;
1277 struct wildcard_list *sec;
1278 lang_input_statement_type *file;
1281 const char *section_name;
1282 lang_statement_union_type *l;
1284 if (!wild->filenames_sorted && (sec == NULL || !sec->spec.sorted))
1287 section_name = bfd_get_section_name (file->the_bfd, section);
1288 for (l = wild->children.head; l != NULL; l = l->header.next)
1290 lang_input_section_type *ls;
1292 if (l->header.type != lang_input_section_enum)
1294 ls = &l->input_section;
1296 /* Sorting by filename takes precedence over sorting by section
1299 if (wild->filenames_sorted)
1301 const char *fn, *ln;
1305 /* The PE support for the .idata section as generated by
1306 dlltool assumes that files will be sorted by the name of
1307 the archive and then the name of the file within the
1310 if (file->the_bfd != NULL
1311 && bfd_my_archive (file->the_bfd) != NULL)
1313 fn = bfd_get_filename (bfd_my_archive (file->the_bfd));
1318 fn = file->filename;
1322 if (ls->ifile->the_bfd != NULL
1323 && bfd_my_archive (ls->ifile->the_bfd) != NULL)
1325 ln = bfd_get_filename (bfd_my_archive (ls->ifile->the_bfd));
1330 ln = ls->ifile->filename;
1334 i = strcmp (fn, ln);
1343 fn = file->filename;
1345 ln = ls->ifile->filename;
1347 i = strcmp (fn, ln);
1355 /* Here either the files are not sorted by name, or we are
1356 looking at the sections for this file. */
1358 if (sec != NULL && sec->spec.sorted)
1360 if (strcmp (section_name,
1361 bfd_get_section_name (ls->ifile->the_bfd,
1371 /* Expand a wild statement for a particular FILE. SECTION may be
1372 NULL, in which case it is a wild card. */
1375 output_section_callback (ptr, sec, section, file, output)
1376 lang_wild_statement_type *ptr;
1377 struct wildcard_list *sec;
1379 lang_input_statement_type *file;
1382 lang_statement_union_type *before;
1384 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1385 if (unique_section_p (bfd_get_section_name (file->the_bfd, section)))
1388 /* If the wild pattern was marked KEEP, the member sections
1389 should be as well. */
1390 if (ptr->keep_sections)
1391 section->flags |= SEC_KEEP;
1393 before = wild_sort (ptr, sec, file, section);
1395 /* Here BEFORE points to the lang_input_section which
1396 should follow the one we are about to add. If BEFORE
1397 is NULL, then the section should just go at the end
1398 of the current list. */
1401 lang_add_section (&ptr->children, section,
1402 (lang_output_section_statement_type *) output,
1406 lang_statement_list_type list;
1407 lang_statement_union_type **pp;
1409 lang_list_init (&list);
1410 lang_add_section (&list, section,
1411 (lang_output_section_statement_type *) output,
1414 /* If we are discarding the section, LIST.HEAD will
1416 if (list.head != NULL)
1418 ASSERT (list.head->header.next == NULL);
1420 for (pp = &ptr->children.head;
1422 pp = &(*pp)->header.next)
1423 ASSERT (*pp != NULL);
1425 list.head->header.next = *pp;
1431 /* This is passed a file name which must have been seen already and
1432 added to the statement tree. We will see if it has been opened
1433 already and had its symbols read. If not then we'll read it. */
1435 static lang_input_statement_type *
1439 lang_input_statement_type *search;
1441 for (search = (lang_input_statement_type *) input_file_chain.head;
1442 search != (lang_input_statement_type *) NULL;
1443 search = (lang_input_statement_type *) search->next_real_file)
1445 if (search->filename == (char *) NULL && name == (char *) NULL)
1447 if (search->filename != (char *) NULL
1448 && name != (char *) NULL
1449 && strcmp (search->filename, name) == 0)
1453 if (search == (lang_input_statement_type *) NULL)
1454 search = new_afile (name, lang_input_file_is_file_enum, default_target,
1457 /* If we have already added this file, or this file is not real
1458 (FIXME: can that ever actually happen?) or the name is NULL
1459 (FIXME: can that ever actually happen?) don't add this file. */
1462 || search->filename == (const char *) NULL)
1465 if (! load_symbols (search, (lang_statement_list_type *) NULL))
1471 /* Get the symbols for an input file. */
1474 load_symbols (entry, place)
1475 lang_input_statement_type *entry;
1476 lang_statement_list_type *place;
1483 ldfile_open_file (entry);
1485 if (! bfd_check_format (entry->the_bfd, bfd_archive)
1486 && ! bfd_check_format_matches (entry->the_bfd, bfd_object, &matching))
1489 lang_statement_list_type *hold;
1490 boolean bad_load = true;
1492 err = bfd_get_error ();
1494 /* See if the emulation has some special knowledge. */
1495 if (ldemul_unrecognized_file (entry))
1498 if (err == bfd_error_file_ambiguously_recognized)
1502 einfo (_("%B: file not recognized: %E\n"), entry->the_bfd);
1503 einfo (_("%B: matching formats:"), entry->the_bfd);
1504 for (p = matching; *p != NULL; p++)
1508 else if (err != bfd_error_file_not_recognized
1510 einfo (_("%F%B: file not recognized: %E\n"), entry->the_bfd);
1514 bfd_close (entry->the_bfd);
1515 entry->the_bfd = NULL;
1517 /* Try to interpret the file as a linker script. */
1518 ldfile_open_command_file (entry->filename);
1523 ldfile_assumed_script = true;
1524 parser_input = input_script;
1526 ldfile_assumed_script = false;
1533 if (ldemul_recognized_file (entry))
1536 /* We don't call ldlang_add_file for an archive. Instead, the
1537 add_symbols entry point will call ldlang_add_file, via the
1538 add_archive_element callback, for each element of the archive
1540 switch (bfd_get_format (entry->the_bfd))
1546 ldlang_add_file (entry);
1547 if (trace_files || trace_file_tries)
1548 info_msg ("%I\n", entry);
1552 if (entry->whole_archive)
1555 boolean loaded = true;
1559 member = bfd_openr_next_archived_file (entry->the_bfd, member);
1564 if (! bfd_check_format (member, bfd_object))
1566 einfo (_("%F%B: member %B in archive is not an object\n"),
1567 entry->the_bfd, member);
1571 if (! ((*link_info.callbacks->add_archive_element)
1572 (&link_info, member, "--whole-archive")))
1575 if (! bfd_link_add_symbols (member, &link_info))
1577 einfo (_("%F%B: could not read symbols: %E\n"), member);
1582 entry->loaded = loaded;
1588 if (bfd_link_add_symbols (entry->the_bfd, &link_info))
1589 entry->loaded = true;
1591 einfo (_("%F%B: could not read symbols: %E\n"), entry->the_bfd);
1593 return entry->loaded;
1596 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
1597 may be NULL, indicating that it is a wildcard. Separate
1598 lang_input_section statements are created for each part of the
1599 expansion; they are added after the wild statement S. OUTPUT is
1600 the output section. */
1603 wild (s, target, output)
1604 lang_wild_statement_type *s;
1605 const char *target ATTRIBUTE_UNUSED;
1606 lang_output_section_statement_type *output;
1608 struct wildcard_list *sec;
1610 walk_wild (s, output_section_callback, (PTR) output);
1612 for (sec = s->section_list; sec != NULL; sec = sec->next)
1614 if (default_common_section != NULL)
1616 if (sec->spec.name != NULL && strcmp (sec->spec.name, "COMMON") == 0)
1618 /* Remember the section that common is going to in case we
1619 later get something which doesn't know where to put it. */
1620 default_common_section = output;
1625 /* Return true iff target is the sought target. */
1628 get_target (target, data)
1629 const bfd_target *target;
1632 const char *sought = (const char *) data;
1634 return strcmp (target->name, sought) == 0;
1637 /* Like strcpy() but convert to lower case as well. */
1646 while ((c = *src++) != 0)
1647 *dest++ = TOLOWER (c);
1652 /* Remove the first occurance of needle (if any) in haystack
1656 strcut (haystack, needle)
1660 haystack = strstr (haystack, needle);
1666 for (src = haystack + strlen (needle); *src;)
1667 *haystack++ = *src++;
1673 /* Compare two target format name strings.
1674 Return a value indicating how "similar" they are. */
1677 name_compare (first, second)
1685 copy1 = xmalloc (strlen (first) + 1);
1686 copy2 = xmalloc (strlen (second) + 1);
1688 /* Convert the names to lower case. */
1689 stricpy (copy1, first);
1690 stricpy (copy2, second);
1692 /* Remove and endian strings from the name. */
1693 strcut (copy1, "big");
1694 strcut (copy1, "little");
1695 strcut (copy2, "big");
1696 strcut (copy2, "little");
1698 /* Return a value based on how many characters match,
1699 starting from the beginning. If both strings are
1700 the same then return 10 * their length. */
1701 for (result = 0; copy1[result] == copy2[result]; result++)
1702 if (copy1[result] == 0)
1714 /* Set by closest_target_match() below. */
1715 static const bfd_target *winner;
1717 /* Scan all the valid bfd targets looking for one that has the endianness
1718 requirement that was specified on the command line, and is the nearest
1719 match to the original output target. */
1722 closest_target_match (target, data)
1723 const bfd_target *target;
1726 const bfd_target *original = (const bfd_target *) data;
1728 if (command_line.endian == ENDIAN_BIG
1729 && target->byteorder != BFD_ENDIAN_BIG)
1732 if (command_line.endian == ENDIAN_LITTLE
1733 && target->byteorder != BFD_ENDIAN_LITTLE)
1736 /* Must be the same flavour. */
1737 if (target->flavour != original->flavour)
1740 /* If we have not found a potential winner yet, then record this one. */
1747 /* Oh dear, we now have two potential candidates for a successful match.
1748 Compare their names and choose the better one. */
1749 if (name_compare (target->name, original->name)
1750 > name_compare (winner->name, original->name))
1753 /* Keep on searching until wqe have checked them all. */
1757 /* Return the BFD target format of the first input file. */
1760 get_first_input_target ()
1762 char *target = NULL;
1764 LANG_FOR_EACH_INPUT_STATEMENT (s)
1766 if (s->header.type == lang_input_statement_enum
1769 ldfile_open_file (s);
1771 if (s->the_bfd != NULL
1772 && bfd_check_format (s->the_bfd, bfd_object))
1774 target = bfd_get_target (s->the_bfd);
1785 /* Open the output file. */
1793 /* Has the user told us which output format to use? */
1794 if (output_target == (char *) NULL)
1796 /* No - has the current target been set to something other than
1798 if (current_target != default_target)
1799 output_target = current_target;
1801 /* No - can we determine the format of the first input file? */
1804 output_target = get_first_input_target ();
1806 /* Failed - use the default output target. */
1807 if (output_target == NULL)
1808 output_target = default_target;
1812 /* Has the user requested a particular endianness on the command
1814 if (command_line.endian != ENDIAN_UNSET)
1816 const bfd_target *target;
1817 enum bfd_endian desired_endian;
1819 /* Get the chosen target. */
1820 target = bfd_search_for_target (get_target, (PTR) output_target);
1822 /* If the target is not supported, we cannot do anything. */
1825 if (command_line.endian == ENDIAN_BIG)
1826 desired_endian = BFD_ENDIAN_BIG;
1828 desired_endian = BFD_ENDIAN_LITTLE;
1830 /* See if the target has the wrong endianness. This should
1831 not happen if the linker script has provided big and
1832 little endian alternatives, but some scrips don't do
1834 if (target->byteorder != desired_endian)
1836 /* If it does, then see if the target provides
1837 an alternative with the correct endianness. */
1838 if (target->alternative_target != NULL
1839 && (target->alternative_target->byteorder == desired_endian))
1840 output_target = target->alternative_target->name;
1843 /* Try to find a target as similar as possible to
1844 the default target, but which has the desired
1845 endian characteristic. */
1846 (void) bfd_search_for_target (closest_target_match,
1849 /* Oh dear - we could not find any targets that
1850 satisfy our requirements. */
1852 einfo (_("%P: warning: could not find any targets that match endianness requirement\n"));
1854 output_target = winner->name;
1860 output = bfd_openw (name, output_target);
1862 if (output == (bfd *) NULL)
1864 if (bfd_get_error () == bfd_error_invalid_target)
1865 einfo (_("%P%F: target %s not found\n"), output_target);
1867 einfo (_("%P%F: cannot open output file %s: %E\n"), name);
1870 delete_output_file_on_failure = true;
1873 output->flags |= D_PAGED;
1876 if (! bfd_set_format (output, bfd_object))
1877 einfo (_("%P%F:%s: can not make object file: %E\n"), name);
1878 if (! bfd_set_arch_mach (output,
1879 ldfile_output_architecture,
1880 ldfile_output_machine))
1881 einfo (_("%P%F:%s: can not set architecture: %E\n"), name);
1883 link_info.hash = bfd_link_hash_table_create (output);
1884 if (link_info.hash == (struct bfd_link_hash_table *) NULL)
1885 einfo (_("%P%F: can not create link hash table: %E\n"));
1887 bfd_set_gp_size (output, g_switch_value);
1892 ldlang_open_output (statement)
1893 lang_statement_union_type *statement;
1895 switch (statement->header.type)
1897 case lang_output_statement_enum:
1898 ASSERT (output_bfd == (bfd *) NULL);
1899 output_bfd = open_output (statement->output_statement.name);
1900 ldemul_set_output_arch ();
1901 if (config.magic_demand_paged && !link_info.relocateable)
1902 output_bfd->flags |= D_PAGED;
1904 output_bfd->flags &= ~D_PAGED;
1905 if (config.text_read_only)
1906 output_bfd->flags |= WP_TEXT;
1908 output_bfd->flags &= ~WP_TEXT;
1909 if (link_info.traditional_format)
1910 output_bfd->flags |= BFD_TRADITIONAL_FORMAT;
1912 output_bfd->flags &= ~BFD_TRADITIONAL_FORMAT;
1915 case lang_target_statement_enum:
1916 current_target = statement->target_statement.target;
1923 /* Open all the input files. */
1926 open_input_bfds (s, force)
1927 lang_statement_union_type *s;
1930 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
1932 switch (s->header.type)
1934 case lang_constructors_statement_enum:
1935 open_input_bfds (constructor_list.head, force);
1937 case lang_output_section_statement_enum:
1938 open_input_bfds (s->output_section_statement.children.head, force);
1940 case lang_wild_statement_enum:
1941 /* Maybe we should load the file's symbols. */
1942 if (s->wild_statement.filename
1943 && ! wildcardp (s->wild_statement.filename))
1944 (void) lookup_name (s->wild_statement.filename);
1945 open_input_bfds (s->wild_statement.children.head, force);
1947 case lang_group_statement_enum:
1949 struct bfd_link_hash_entry *undefs;
1951 /* We must continually search the entries in the group
1952 until no new symbols are added to the list of undefined
1957 undefs = link_info.hash->undefs_tail;
1958 open_input_bfds (s->group_statement.children.head, true);
1960 while (undefs != link_info.hash->undefs_tail);
1963 case lang_target_statement_enum:
1964 current_target = s->target_statement.target;
1966 case lang_input_statement_enum:
1967 if (s->input_statement.real)
1969 lang_statement_list_type add;
1971 s->input_statement.target = current_target;
1973 /* If we are being called from within a group, and this
1974 is an archive which has already been searched, then
1975 force it to be researched unless the whole archive
1976 has been loaded already. */
1978 && !s->input_statement.whole_archive
1979 && s->input_statement.loaded
1980 && bfd_check_format (s->input_statement.the_bfd,
1982 s->input_statement.loaded = false;
1984 lang_list_init (&add);
1986 if (! load_symbols (&s->input_statement, &add))
1987 config.make_executable = false;
1989 if (add.head != NULL)
1991 *add.tail = s->header.next;
1992 s->header.next = add.head;
2002 /* If there are [COMMONS] statements, put a wild one into the bss
2006 lang_reasonable_defaults ()
2009 lang_output_section_statement_lookup (".text");
2010 lang_output_section_statement_lookup (".data");
2012 default_common_section = lang_output_section_statement_lookup (".bss");
2014 if (placed_commons == false)
2016 lang_wild_statement_type *new =
2017 new_stat (lang_wild_statement,
2018 &default_common_section->children);
2020 new->section_name = "COMMON";
2021 new->filename = (char *) NULL;
2022 lang_list_init (&new->children);
2027 /* Add the supplied name to the symbol table as an undefined reference.
2028 This is a two step process as the symbol table doesn't even exist at
2029 the time the ld command line is processed. First we put the name
2030 on a list, then, once the output file has been opened, transfer the
2031 name to the symbol table. */
2033 typedef struct bfd_sym_chain ldlang_undef_chain_list_type;
2035 #define ldlang_undef_chain_list_head entry_symbol.next
2038 ldlang_add_undef (name)
2039 const char *const name;
2041 ldlang_undef_chain_list_type *new =
2042 ((ldlang_undef_chain_list_type *)
2043 stat_alloc (sizeof (ldlang_undef_chain_list_type)));
2045 new->next = ldlang_undef_chain_list_head;
2046 ldlang_undef_chain_list_head = new;
2048 new->name = xstrdup (name);
2050 if (output_bfd != NULL)
2051 insert_undefined (new->name);
2054 /* Insert NAME as undefined in the symbol table. */
2057 insert_undefined (name)
2060 struct bfd_link_hash_entry *h;
2062 h = bfd_link_hash_lookup (link_info.hash, name, true, false, true);
2063 if (h == (struct bfd_link_hash_entry *) NULL)
2064 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2065 if (h->type == bfd_link_hash_new)
2067 h->type = bfd_link_hash_undefined;
2068 h->u.undef.abfd = NULL;
2069 bfd_link_add_undef (link_info.hash, h);
2073 /* Run through the list of undefineds created above and place them
2074 into the linker hash table as undefined symbols belonging to the
2078 lang_place_undefineds ()
2080 ldlang_undef_chain_list_type *ptr;
2082 for (ptr = ldlang_undef_chain_list_head;
2083 ptr != (ldlang_undef_chain_list_type *) NULL;
2086 insert_undefined (ptr->name);
2090 /* Open input files and attatch to output sections. */
2093 map_input_to_output_sections (s, target, output_section_statement)
2094 lang_statement_union_type *s;
2096 lang_output_section_statement_type *output_section_statement;
2098 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
2100 switch (s->header.type)
2102 case lang_wild_statement_enum:
2103 wild (&s->wild_statement, target, output_section_statement);
2105 case lang_constructors_statement_enum:
2106 map_input_to_output_sections (constructor_list.head,
2108 output_section_statement);
2110 case lang_output_section_statement_enum:
2111 map_input_to_output_sections (s->output_section_statement.children.head,
2113 &s->output_section_statement);
2115 case lang_output_statement_enum:
2117 case lang_target_statement_enum:
2118 target = s->target_statement.target;
2120 case lang_group_statement_enum:
2121 map_input_to_output_sections (s->group_statement.children.head,
2123 output_section_statement);
2125 case lang_fill_statement_enum:
2126 case lang_input_section_enum:
2127 case lang_object_symbols_statement_enum:
2128 case lang_data_statement_enum:
2129 case lang_reloc_statement_enum:
2130 case lang_padding_statement_enum:
2131 case lang_input_statement_enum:
2132 if (output_section_statement != NULL
2133 && output_section_statement->bfd_section == NULL)
2134 init_os (output_section_statement);
2136 case lang_assignment_statement_enum:
2137 if (output_section_statement != NULL
2138 && output_section_statement->bfd_section == NULL)
2139 init_os (output_section_statement);
2141 /* Make sure that any sections mentioned in the assignment
2143 exp_init_os (s->assignment_statement.exp);
2145 case lang_afile_asection_pair_statement_enum:
2148 case lang_address_statement_enum:
2149 /* Mark the specified section with the supplied address. */
2151 lang_output_section_statement_type *os =
2152 lang_output_section_statement_lookup
2153 (s->address_statement.section_name);
2155 if (os->bfd_section == NULL)
2157 os->addr_tree = s->address_statement.address;
2165 print_output_section_statement (output_section_statement)
2166 lang_output_section_statement_type *output_section_statement;
2168 asection *section = output_section_statement->bfd_section;
2171 if (output_section_statement != abs_output_section)
2173 minfo ("\n%s", output_section_statement->name);
2175 if (section != NULL)
2177 print_dot = section->vma;
2179 len = strlen (output_section_statement->name);
2180 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2185 while (len < SECTION_NAME_MAP_LENGTH)
2191 minfo ("0x%V %W", section->vma, section->_raw_size);
2193 if (output_section_statement->load_base != NULL)
2197 addr = exp_get_abs_int (output_section_statement->load_base, 0,
2198 "load base", lang_final_phase_enum);
2199 minfo (_(" load address 0x%V"), addr);
2206 print_statement_list (output_section_statement->children.head,
2207 output_section_statement);
2211 print_assignment (assignment, output_section)
2212 lang_assignment_statement_type *assignment;
2213 lang_output_section_statement_type *output_section;
2216 etree_value_type result;
2218 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2221 result = exp_fold_tree (assignment->exp->assign.src, output_section,
2222 lang_final_phase_enum, print_dot, &print_dot);
2228 value = result.value + result.section->bfd_section->vma;
2229 dst = assignment->exp->assign.dst;
2231 minfo ("0x%V", value);
2232 if (dst[0] == '.' && dst[1] == 0)
2245 exp_print_tree (assignment->exp);
2251 print_input_statement (statm)
2252 lang_input_statement_type *statm;
2254 if (statm->filename != (char *) NULL)
2256 fprintf (config.map_file, "LOAD %s\n", statm->filename);
2260 /* Print all symbols defined in a particular section. This is called
2261 via bfd_link_hash_traverse. */
2264 print_one_symbol (hash_entry, ptr)
2265 struct bfd_link_hash_entry *hash_entry;
2268 asection *sec = (asection *) ptr;
2270 if ((hash_entry->type == bfd_link_hash_defined
2271 || hash_entry->type == bfd_link_hash_defweak)
2272 && sec == hash_entry->u.def.section)
2276 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2279 (hash_entry->u.def.value
2280 + hash_entry->u.def.section->output_offset
2281 + hash_entry->u.def.section->output_section->vma));
2283 minfo (" %T\n", hash_entry->root.string);
2289 /* Print information about an input section to the map file. */
2292 print_input_section (in)
2293 lang_input_section_type *in;
2295 asection *i = in->section;
2296 bfd_size_type size = i->_cooked_size != 0 ? i->_cooked_size : i->_raw_size;
2297 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2298 ldfile_output_machine);
2303 minfo ("%s", i->name);
2305 if (i->output_section != NULL)
2309 len = 1 + strlen (i->name);
2310 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2315 while (len < SECTION_NAME_MAP_LENGTH)
2321 minfo ("0x%V %W %B\n",
2322 i->output_section->vma + i->output_offset, size / opb,
2325 if (i->_cooked_size != 0 && i->_cooked_size != i->_raw_size)
2327 len = SECTION_NAME_MAP_LENGTH + 3;
2339 minfo (_("%W (size before relaxing)\n"), i->_raw_size);
2342 bfd_link_hash_traverse (link_info.hash, print_one_symbol, (PTR) i);
2344 print_dot = i->output_section->vma + i->output_offset + size / opb;
2350 print_fill_statement (fill)
2351 lang_fill_statement_type *fill;
2355 fputs (" FILL mask 0x", config.map_file);
2356 for (p = fill->fill->data, size = fill->fill->size; size != 0; p++, size--)
2357 fprintf (config.map_file, "%02x", *p);
2358 fputs ("\n", config.map_file);
2362 print_data_statement (data)
2363 lang_data_statement_type *data;
2369 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2370 ldfile_output_machine);
2372 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2375 addr = data->output_vma;
2376 if (data->output_section != NULL)
2377 addr += data->output_section->vma;
2405 minfo ("0x%V %W %s 0x%v", addr, size, name, data->value);
2407 if (data->exp->type.node_class != etree_value)
2410 exp_print_tree (data->exp);
2415 print_dot = addr + size / opb;
2419 /* Print an address statement. These are generated by options like
2423 print_address_statement (address)
2424 lang_address_statement_type *address;
2426 minfo (_("Address of section %s set to "), address->section_name);
2427 exp_print_tree (address->address);
2431 /* Print a reloc statement. */
2434 print_reloc_statement (reloc)
2435 lang_reloc_statement_type *reloc;
2440 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2441 ldfile_output_machine);
2443 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2446 addr = reloc->output_vma;
2447 if (reloc->output_section != NULL)
2448 addr += reloc->output_section->vma;
2450 size = bfd_get_reloc_size (reloc->howto);
2452 minfo ("0x%V %W RELOC %s ", addr, size, reloc->howto->name);
2454 if (reloc->name != NULL)
2455 minfo ("%s+", reloc->name);
2457 minfo ("%s+", reloc->section->name);
2459 exp_print_tree (reloc->addend_exp);
2463 print_dot = addr + size / opb;
2467 print_padding_statement (s)
2468 lang_padding_statement_type *s;
2472 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2473 ldfile_output_machine);
2477 len = sizeof " *fill*" - 1;
2478 while (len < SECTION_NAME_MAP_LENGTH)
2484 addr = s->output_offset;
2485 if (s->output_section != NULL)
2486 addr += s->output_section->vma;
2487 minfo ("0x%V %W ", addr, s->size);
2489 if (s->fill->size != 0)
2493 for (p = s->fill->data, size = s->fill->size; size != 0; p++, size--)
2494 fprintf (config.map_file, "%02x", *p);
2499 print_dot = addr + s->size / opb;
2503 print_wild_statement (w, os)
2504 lang_wild_statement_type *w;
2505 lang_output_section_statement_type *os;
2507 struct wildcard_list *sec;
2511 if (w->filenames_sorted)
2513 if (w->filename != NULL)
2514 minfo ("%s", w->filename);
2517 if (w->filenames_sorted)
2521 for (sec = w->section_list; sec; sec = sec->next)
2523 if (sec->spec.sorted)
2525 if (sec->spec.exclude_name_list != NULL)
2528 minfo ("EXCLUDE_FILE ( %s", sec->spec.exclude_name_list->name);
2529 for (tmp = sec->spec.exclude_name_list->next; tmp; tmp = tmp->next)
2530 minfo (", %s", tmp->name);
2533 if (sec->spec.name != NULL)
2534 minfo ("%s", sec->spec.name);
2537 if (sec->spec.sorted)
2544 print_statement_list (w->children.head, os);
2547 /* Print a group statement. */
2551 lang_group_statement_type *s;
2552 lang_output_section_statement_type *os;
2554 fprintf (config.map_file, "START GROUP\n");
2555 print_statement_list (s->children.head, os);
2556 fprintf (config.map_file, "END GROUP\n");
2559 /* Print the list of statements in S.
2560 This can be called for any statement type. */
2563 print_statement_list (s, os)
2564 lang_statement_union_type *s;
2565 lang_output_section_statement_type *os;
2569 print_statement (s, os);
2574 /* Print the first statement in statement list S.
2575 This can be called for any statement type. */
2578 print_statement (s, os)
2579 lang_statement_union_type *s;
2580 lang_output_section_statement_type *os;
2582 switch (s->header.type)
2585 fprintf (config.map_file, _("Fail with %d\n"), s->header.type);
2588 case lang_constructors_statement_enum:
2589 if (constructor_list.head != NULL)
2591 if (constructors_sorted)
2592 minfo (" SORT (CONSTRUCTORS)\n");
2594 minfo (" CONSTRUCTORS\n");
2595 print_statement_list (constructor_list.head, os);
2598 case lang_wild_statement_enum:
2599 print_wild_statement (&s->wild_statement, os);
2601 case lang_address_statement_enum:
2602 print_address_statement (&s->address_statement);
2604 case lang_object_symbols_statement_enum:
2605 minfo (" CREATE_OBJECT_SYMBOLS\n");
2607 case lang_fill_statement_enum:
2608 print_fill_statement (&s->fill_statement);
2610 case lang_data_statement_enum:
2611 print_data_statement (&s->data_statement);
2613 case lang_reloc_statement_enum:
2614 print_reloc_statement (&s->reloc_statement);
2616 case lang_input_section_enum:
2617 print_input_section (&s->input_section);
2619 case lang_padding_statement_enum:
2620 print_padding_statement (&s->padding_statement);
2622 case lang_output_section_statement_enum:
2623 print_output_section_statement (&s->output_section_statement);
2625 case lang_assignment_statement_enum:
2626 print_assignment (&s->assignment_statement, os);
2628 case lang_target_statement_enum:
2629 fprintf (config.map_file, "TARGET(%s)\n", s->target_statement.target);
2631 case lang_output_statement_enum:
2632 minfo ("OUTPUT(%s", s->output_statement.name);
2633 if (output_target != NULL)
2634 minfo (" %s", output_target);
2637 case lang_input_statement_enum:
2638 print_input_statement (&s->input_statement);
2640 case lang_group_statement_enum:
2641 print_group (&s->group_statement, os);
2643 case lang_afile_asection_pair_statement_enum:
2652 print_statement_list (statement_list.head, abs_output_section);
2655 /* Print the first N statements in statement list S to STDERR.
2656 If N == 0, nothing is printed.
2657 If N < 0, the entire list is printed.
2658 Intended to be called from GDB. */
2661 dprint_statement (s, n)
2662 lang_statement_union_type *s;
2665 FILE *map_save = config.map_file;
2667 config.map_file = stderr;
2670 print_statement_list (s, abs_output_section);
2673 while (s && --n >= 0)
2675 print_statement (s, abs_output_section);
2680 config.map_file = map_save;
2684 insert_pad (ptr, fill, alignment_needed, output_section, dot)
2685 lang_statement_union_type **ptr;
2687 unsigned int alignment_needed;
2688 asection *output_section;
2691 static fill_type zero_fill = { 1, { 0 } };
2692 lang_statement_union_type *pad;
2694 pad = ((lang_statement_union_type *)
2695 ((char *) ptr - offsetof (lang_statement_union_type, header.next)));
2696 if (ptr != &statement_list.head
2697 && pad->header.type == lang_padding_statement_enum
2698 && pad->padding_statement.output_section == output_section)
2700 /* Use the existing pad statement. The above test on output
2701 section is probably redundant, but it doesn't hurt to check. */
2705 /* Make a new padding statement, linked into existing chain. */
2706 pad = ((lang_statement_union_type *)
2707 stat_alloc (sizeof (lang_padding_statement_type)));
2708 pad->header.next = *ptr;
2710 pad->header.type = lang_padding_statement_enum;
2711 pad->padding_statement.output_section = output_section;
2712 if (fill == (fill_type *) 0)
2714 pad->padding_statement.fill = fill;
2716 pad->padding_statement.output_offset = dot - output_section->vma;
2717 pad->padding_statement.size = alignment_needed;
2718 output_section->_raw_size += alignment_needed;
2721 /* Work out how much this section will move the dot point. */
2724 size_input_section (this_ptr, output_section_statement, fill, dot)
2725 lang_statement_union_type **this_ptr;
2726 lang_output_section_statement_type *output_section_statement;
2730 lang_input_section_type *is = &((*this_ptr)->input_section);
2731 asection *i = is->section;
2733 if (is->ifile->just_syms_flag == false)
2735 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2736 ldfile_output_machine);
2737 unsigned int alignment_needed;
2740 /* Align this section first to the input sections requirement,
2741 then to the output section's requirement. If this alignment
2742 is greater than any seen before, then record it too. Perform
2743 the alignment by inserting a magic 'padding' statement. */
2745 if (output_section_statement->subsection_alignment != -1)
2746 i->alignment_power = output_section_statement->subsection_alignment;
2748 o = output_section_statement->bfd_section;
2749 if (o->alignment_power < i->alignment_power)
2750 o->alignment_power = i->alignment_power;
2752 alignment_needed = align_power (dot, i->alignment_power) - dot;
2754 if (alignment_needed != 0)
2756 insert_pad (this_ptr, fill, alignment_needed * opb, o, dot);
2757 dot += alignment_needed;
2760 /* Remember where in the output section this input section goes. */
2762 i->output_offset = dot - o->vma;
2764 /* Mark how big the output section must be to contain this now. */
2765 if (i->_cooked_size != 0)
2766 dot += i->_cooked_size / opb;
2768 dot += i->_raw_size / opb;
2769 o->_raw_size = (dot - o->vma) * opb;
2773 i->output_offset = i->vma - output_section_statement->bfd_section->vma;
2779 #define IGNORE_SECTION(bfd, s) \
2780 (((bfd_get_section_flags (bfd, s) & (SEC_ALLOC | SEC_LOAD)) \
2781 != (SEC_ALLOC | SEC_LOAD)) \
2782 || bfd_section_size (bfd, s) == 0)
2784 /* Check to see if any allocated sections overlap with other allocated
2785 sections. This can happen when the linker script specifically specifies
2786 the output section addresses of the two sections. */
2789 lang_check_section_addresses ()
2792 unsigned opb = bfd_octets_per_byte (output_bfd);
2794 /* Scan all sections in the output list. */
2795 for (s = output_bfd->sections; s != NULL; s = s->next)
2799 /* Ignore sections which are not loaded or which have no contents. */
2800 if (IGNORE_SECTION (output_bfd, s))
2803 /* Once we reach section 's' stop our seach. This prevents two
2804 warning messages from being produced, one for 'section A overlaps
2805 section B' and one for 'section B overlaps section A'. */
2806 for (os = output_bfd->sections; os != s; os = os->next)
2813 /* Only consider loadable sections with real contents. */
2814 if (IGNORE_SECTION (output_bfd, os))
2817 /* We must check the sections' LMA addresses not their
2818 VMA addresses because overlay sections can have
2819 overlapping VMAs but they must have distinct LMAs. */
2820 s_start = bfd_section_lma (output_bfd, s);
2821 os_start = bfd_section_lma (output_bfd, os);
2822 s_end = s_start + bfd_section_size (output_bfd, s) / opb - 1;
2823 os_end = os_start + bfd_section_size (output_bfd, os) / opb - 1;
2825 /* Look for an overlap. */
2826 if ((s_end < os_start) || (s_start > os_end))
2830 _("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
2831 s->name, s_start, s_end, os->name, os_start, os_end);
2833 /* Once we have found one overlap for this section,
2834 stop looking for others. */
2840 /* Make sure the new address is within the region. We explicitly permit the
2841 current address to be at the exact end of the region when the address is
2842 non-zero, in case the region is at the end of addressable memory and the
2843 calculation wraps around. */
2846 os_region_check (os, region, tree, base)
2847 lang_output_section_statement_type *os;
2848 struct memory_region_struct *region;
2852 if ((region->current < region->origin
2853 || (region->current - region->origin > region->length))
2854 && ((region->current != region->origin + region->length)
2857 if (tree != (etree_type *) NULL)
2859 einfo (_("%X%P: address 0x%v of %B section %s is not within region %s\n"),
2861 os->bfd_section->owner,
2862 os->bfd_section->name,
2867 einfo (_("%X%P: region %s is full (%B section %s)\n"),
2869 os->bfd_section->owner,
2870 os->bfd_section->name);
2872 /* Reset the region pointer. */
2873 region->current = region->origin;
2877 /* Set the sizes for all the output sections. */
2880 lang_size_sections_1 (s, output_section_statement, prev, fill, dot, relax)
2881 lang_statement_union_type *s;
2882 lang_output_section_statement_type *output_section_statement;
2883 lang_statement_union_type **prev;
2888 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2889 ldfile_output_machine);
2891 /* Size up the sections from their constituent parts. */
2892 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
2894 switch (s->header.type)
2896 case lang_output_section_statement_enum:
2899 lang_output_section_statement_type *os;
2901 os = &s->output_section_statement;
2902 if (os->bfd_section == NULL)
2903 /* This section was never actually created. */
2906 /* The section might have been removed after its statement was
2907 added. For example, ldemul_before_allocation can remove
2908 dynamic sections if they turn out not to be needed. */
2909 if (!link_info.relocateable
2910 && (bfd_get_section_flags (output_bfd, os->bfd_section)
2911 & SEC_EXCLUDE) != 0)
2914 /* If this is a COFF shared library section, use the size and
2915 address from the input section. FIXME: This is COFF
2916 specific; it would be cleaner if there were some other way
2917 to do this, but nothing simple comes to mind. */
2918 if ((os->bfd_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
2922 if (os->children.head == NULL
2923 || os->children.head->header.next != NULL
2924 || os->children.head->header.type != lang_input_section_enum)
2925 einfo (_("%P%X: Internal error on COFF shared library section %s\n"),
2928 input = os->children.head->input_section.section;
2929 bfd_set_section_vma (os->bfd_section->owner,
2931 bfd_section_vma (input->owner, input));
2932 os->bfd_section->_raw_size = input->_raw_size;
2936 if (bfd_is_abs_section (os->bfd_section))
2938 /* No matter what happens, an abs section starts at zero. */
2939 ASSERT (os->bfd_section->vma == 0);
2943 if (os->addr_tree == (etree_type *) NULL)
2945 /* No address specified for this section, get one
2946 from the region specification. */
2947 if (os->region == (lang_memory_region_type *) NULL
2948 || (((bfd_get_section_flags (output_bfd, os->bfd_section)
2949 & (SEC_ALLOC | SEC_LOAD)) != 0)
2950 && os->region->name[0] == '*'
2951 && strcmp (os->region->name, "*default*") == 0))
2953 os->region = lang_memory_default (os->bfd_section);
2956 /* If a loadable section is using the default memory
2957 region, and some non default memory regions were
2958 defined, issue a warning. */
2959 if ((bfd_get_section_flags (output_bfd, os->bfd_section)
2960 & (SEC_ALLOC | SEC_LOAD)) != 0
2961 && (bfd_get_section_flags (output_bfd, os->bfd_section)
2962 & SEC_NEVER_LOAD) == 0
2963 && ! link_info.relocateable
2964 && strcmp (os->region->name, "*default*") == 0
2965 && lang_memory_region_list != NULL
2966 && (strcmp (lang_memory_region_list->name,
2968 || lang_memory_region_list->next != NULL))
2969 einfo (_("%P: warning: no memory region specified for section `%s'\n"),
2970 bfd_get_section_name (output_bfd,
2973 dot = os->region->current;
2975 if (os->section_alignment == -1)
2980 dot = align_power (dot,
2981 os->bfd_section->alignment_power);
2983 if (dot != olddot && config.warn_section_align)
2984 einfo (_("%P: warning: changing start of section %s by %u bytes\n"),
2985 os->name, (unsigned int) (dot - olddot));
2992 r = exp_fold_tree (os->addr_tree,
2994 lang_allocating_phase_enum,
2996 if (r.valid_p == false)
2998 einfo (_("%F%S: non constant address expression for section %s\n"),
3001 dot = r.value + r.section->bfd_section->vma;
3004 /* The section starts here.
3005 First, align to what the section needs. */
3007 if (os->section_alignment != -1)
3008 dot = align_power (dot, os->section_alignment);
3010 bfd_set_section_vma (0, os->bfd_section, dot);
3012 os->bfd_section->output_offset = 0;
3015 lang_size_sections_1 (os->children.head, os, &os->children.head,
3016 os->fill, dot, relax);
3018 /* Put the section within the requested block size, or
3019 align at the block boundary. */
3020 after = ALIGN_N (os->bfd_section->vma
3021 + os->bfd_section->_raw_size / opb,
3022 /* The coercion here is important, see ld.h. */
3023 (bfd_vma) os->block_value);
3025 if (bfd_is_abs_section (os->bfd_section))
3026 ASSERT (after == os->bfd_section->vma);
3027 else if ((os->bfd_section->flags & SEC_HAS_CONTENTS) == 0
3028 && (os->bfd_section->flags & SEC_THREAD_LOCAL))
3029 os->bfd_section->_raw_size = 0;
3031 os->bfd_section->_raw_size =
3032 (after - os->bfd_section->vma) * opb;
3034 dot = os->bfd_section->vma + os->bfd_section->_raw_size / opb;
3035 os->processed = true;
3037 if (os->update_dot_tree != 0)
3038 exp_fold_tree (os->update_dot_tree, abs_output_section,
3039 lang_allocating_phase_enum, dot, &dot);
3041 /* Update dot in the region ?
3042 We only do this if the section is going to be allocated,
3043 since unallocated sections do not contribute to the region's
3044 overall size in memory.
3046 If the SEC_NEVER_LOAD bit is not set, it will affect the
3047 addresses of sections after it. We have to update
3049 if (os->region != (lang_memory_region_type *) NULL
3050 && ((bfd_get_section_flags (output_bfd, os->bfd_section)
3051 & SEC_NEVER_LOAD) == 0
3052 || (bfd_get_section_flags (output_bfd, os->bfd_section)
3053 & (SEC_ALLOC | SEC_LOAD))))
3055 os->region->current = dot;
3057 /* Make sure the new address is within the region. */
3058 os_region_check (os, os->region, os->addr_tree,
3059 os->bfd_section->vma);
3061 /* If there's no load address specified, use the run
3062 region as the load region. */
3063 if (os->lma_region == NULL && os->load_base == NULL)
3064 os->lma_region = os->region;
3066 if (os->lma_region != NULL && os->lma_region != os->region)
3068 /* Set load_base, which will be handled later. */
3069 os->load_base = exp_intop (os->lma_region->current);
3070 os->lma_region->current +=
3071 os->bfd_section->_raw_size / opb;
3072 os_region_check (os, os->lma_region, NULL,
3073 os->bfd_section->lma);
3079 case lang_constructors_statement_enum:
3080 dot = lang_size_sections_1 (constructor_list.head,
3081 output_section_statement,
3082 &s->wild_statement.children.head,
3086 case lang_data_statement_enum:
3088 unsigned int size = 0;
3090 s->data_statement.output_vma =
3091 dot - output_section_statement->bfd_section->vma;
3092 s->data_statement.output_section =
3093 output_section_statement->bfd_section;
3095 switch (s->data_statement.type)
3116 output_section_statement->bfd_section->_raw_size += size;
3117 /* The output section gets contents, and then we inspect for
3118 any flags set in the input script which override any ALLOC. */
3119 output_section_statement->bfd_section->flags |= SEC_HAS_CONTENTS;
3120 if (!(output_section_statement->flags & SEC_NEVER_LOAD))
3122 output_section_statement->bfd_section->flags |=
3123 SEC_ALLOC | SEC_LOAD;
3128 case lang_reloc_statement_enum:
3132 s->reloc_statement.output_vma =
3133 dot - output_section_statement->bfd_section->vma;
3134 s->reloc_statement.output_section =
3135 output_section_statement->bfd_section;
3136 size = bfd_get_reloc_size (s->reloc_statement.howto);
3138 output_section_statement->bfd_section->_raw_size += size;
3142 case lang_wild_statement_enum:
3144 dot = lang_size_sections_1 (s->wild_statement.children.head,
3145 output_section_statement,
3146 &s->wild_statement.children.head,
3151 case lang_object_symbols_statement_enum:
3152 link_info.create_object_symbols_section =
3153 output_section_statement->bfd_section;
3155 case lang_output_statement_enum:
3156 case lang_target_statement_enum:
3158 case lang_input_section_enum:
3162 i = (*prev)->input_section.section;
3165 if (i->_cooked_size == 0)
3166 i->_cooked_size = i->_raw_size;
3172 if (! bfd_relax_section (i->owner, i, &link_info, &again))
3173 einfo (_("%P%F: can't relax section: %E\n"));
3177 dot = size_input_section (prev, output_section_statement,
3178 output_section_statement->fill, dot);
3181 case lang_input_statement_enum:
3183 case lang_fill_statement_enum:
3184 s->fill_statement.output_section =
3185 output_section_statement->bfd_section;
3187 fill = s->fill_statement.fill;
3189 case lang_assignment_statement_enum:
3191 bfd_vma newdot = dot;
3193 exp_fold_tree (s->assignment_statement.exp,
3194 output_section_statement,
3195 lang_allocating_phase_enum,
3201 if (output_section_statement == abs_output_section)
3203 /* If we don't have an output section, then just adjust
3204 the default memory address. */
3205 lang_memory_region_lookup ("*default*")->current = newdot;
3209 /* Insert a pad after this statement. We can't
3210 put the pad before when relaxing, in case the
3211 assignment references dot. */
3212 insert_pad (&s->header.next, fill, (newdot - dot) * opb,
3213 output_section_statement->bfd_section, dot);
3215 /* Don't neuter the pad below when relaxing. */
3224 case lang_padding_statement_enum:
3225 /* If this is the first time lang_size_sections is called,
3226 we won't have any padding statements. If this is the
3227 second or later passes when relaxing, we should allow
3228 padding to shrink. If padding is needed on this pass, it
3229 will be added back in. */
3230 s->padding_statement.size = 0;
3232 /* Make sure output_offset is valid. If relaxation shrinks
3233 the section and this pad isn't needed, it's possible to
3234 have output_offset larger than the final size of the
3235 section. bfd_set_section_contents will complain even for
3236 a pad size of zero. */
3237 s->padding_statement.output_offset
3238 = dot - output_section_statement->bfd_section->vma;
3241 case lang_group_statement_enum:
3242 dot = lang_size_sections_1 (s->group_statement.children.head,
3243 output_section_statement,
3244 &s->group_statement.children.head,
3252 /* We can only get here when relaxing is turned on. */
3253 case lang_address_statement_enum:
3256 prev = &s->header.next;
3262 lang_size_sections (s, output_section_statement, prev, fill, dot, relax)
3263 lang_statement_union_type *s;
3264 lang_output_section_statement_type *output_section_statement;
3265 lang_statement_union_type **prev;
3272 exp_data_seg.phase = exp_dataseg_none;
3273 result = lang_size_sections_1 (s, output_section_statement, prev, fill,
3275 if (exp_data_seg.phase == exp_dataseg_end_seen)
3277 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether
3278 a page could be saved in the data segment. */
3279 bfd_vma first, last;
3281 first = -exp_data_seg.base & (exp_data_seg.pagesize - 1);
3282 last = exp_data_seg.end & (exp_data_seg.pagesize - 1);
3284 && ((exp_data_seg.base & ~(exp_data_seg.pagesize - 1))
3285 != (exp_data_seg.end & ~(exp_data_seg.pagesize - 1)))
3286 && first + last <= exp_data_seg.pagesize)
3288 exp_data_seg.phase = exp_dataseg_adjust;
3289 result = lang_size_sections_1 (s, output_section_statement, prev,
3298 lang_do_assignments (s, output_section_statement, fill, dot)
3299 lang_statement_union_type *s;
3300 lang_output_section_statement_type *output_section_statement;
3304 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
3305 ldfile_output_machine);
3307 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
3309 switch (s->header.type)
3311 case lang_constructors_statement_enum:
3312 dot = lang_do_assignments (constructor_list.head,
3313 output_section_statement,
3318 case lang_output_section_statement_enum:
3320 lang_output_section_statement_type *os;
3322 os = &(s->output_section_statement);
3323 if (os->bfd_section != NULL)
3325 dot = os->bfd_section->vma;
3326 (void) lang_do_assignments (os->children.head, os,
3328 dot = os->bfd_section->vma + os->bfd_section->_raw_size / opb;
3333 /* If nothing has been placed into the output section then
3334 it won't have a bfd_section. */
3335 if (os->bfd_section)
3337 os->bfd_section->lma
3338 = exp_get_abs_int (os->load_base, 0, "load base",
3339 lang_final_phase_enum);
3344 case lang_wild_statement_enum:
3346 dot = lang_do_assignments (s->wild_statement.children.head,
3347 output_section_statement,
3352 case lang_object_symbols_statement_enum:
3353 case lang_output_statement_enum:
3354 case lang_target_statement_enum:
3356 case lang_common_statement_enum:
3359 case lang_data_statement_enum:
3361 etree_value_type value;
3363 value = exp_fold_tree (s->data_statement.exp,
3365 lang_final_phase_enum, dot, &dot);
3366 s->data_statement.value = value.value;
3367 if (value.valid_p == false)
3368 einfo (_("%F%P: invalid data statement\n"));
3372 switch (s->data_statement.type)
3396 case lang_reloc_statement_enum:
3398 etree_value_type value;
3400 value = exp_fold_tree (s->reloc_statement.addend_exp,
3402 lang_final_phase_enum, dot, &dot);
3403 s->reloc_statement.addend_value = value.value;
3404 if (value.valid_p == false)
3405 einfo (_("%F%P: invalid reloc statement\n"));
3407 dot += bfd_get_reloc_size (s->reloc_statement.howto) / opb;
3410 case lang_input_section_enum:
3412 asection *in = s->input_section.section;
3414 if (in->_cooked_size != 0)
3415 dot += in->_cooked_size / opb;
3417 dot += in->_raw_size / opb;
3421 case lang_input_statement_enum:
3423 case lang_fill_statement_enum:
3424 fill = s->fill_statement.fill;
3426 case lang_assignment_statement_enum:
3428 exp_fold_tree (s->assignment_statement.exp,
3429 output_section_statement,
3430 lang_final_phase_enum,
3436 case lang_padding_statement_enum:
3437 dot += s->padding_statement.size / opb;
3440 case lang_group_statement_enum:
3441 dot = lang_do_assignments (s->group_statement.children.head,
3442 output_section_statement,
3450 case lang_address_statement_enum:
3458 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
3459 operator .startof. (section_name), it produces an undefined symbol
3460 .startof.section_name. Similarly, when it sees
3461 .sizeof. (section_name), it produces an undefined symbol
3462 .sizeof.section_name. For all the output sections, we look for
3463 such symbols, and set them to the correct value. */
3470 if (link_info.relocateable)
3473 for (s = output_bfd->sections; s != NULL; s = s->next)
3475 const char *secname;
3477 struct bfd_link_hash_entry *h;
3479 secname = bfd_get_section_name (output_bfd, s);
3480 buf = xmalloc (10 + strlen (secname));
3482 sprintf (buf, ".startof.%s", secname);
3483 h = bfd_link_hash_lookup (link_info.hash, buf, false, false, true);
3484 if (h != NULL && h->type == bfd_link_hash_undefined)
3486 h->type = bfd_link_hash_defined;
3487 h->u.def.value = bfd_get_section_vma (output_bfd, s);
3488 h->u.def.section = bfd_abs_section_ptr;
3491 sprintf (buf, ".sizeof.%s", secname);
3492 h = bfd_link_hash_lookup (link_info.hash, buf, false, false, true);
3493 if (h != NULL && h->type == bfd_link_hash_undefined)
3497 opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
3498 ldfile_output_machine);
3499 h->type = bfd_link_hash_defined;
3500 if (s->_cooked_size != 0)
3501 h->u.def.value = s->_cooked_size / opb;
3503 h->u.def.value = s->_raw_size / opb;
3504 h->u.def.section = bfd_abs_section_ptr;
3514 struct bfd_link_hash_entry *h;
3517 if (link_info.relocateable || link_info.shared)
3522 if (entry_symbol.name == (const char *) NULL)
3524 /* No entry has been specified. Look for start, but don't warn
3525 if we don't find it. */
3526 entry_symbol.name = "start";
3530 h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
3531 false, false, true);
3532 if (h != (struct bfd_link_hash_entry *) NULL
3533 && (h->type == bfd_link_hash_defined
3534 || h->type == bfd_link_hash_defweak)
3535 && h->u.def.section->output_section != NULL)
3539 val = (h->u.def.value
3540 + bfd_get_section_vma (output_bfd,
3541 h->u.def.section->output_section)
3542 + h->u.def.section->output_offset);
3543 if (! bfd_set_start_address (output_bfd, val))
3544 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol.name);
3551 /* We couldn't find the entry symbol. Try parsing it as a
3553 val = bfd_scan_vma (entry_symbol.name, &send, 0);
3556 if (! bfd_set_start_address (output_bfd, val))
3557 einfo (_("%P%F: can't set start address\n"));
3563 /* Can't find the entry symbol, and it's not a number. Use
3564 the first address in the text section. */
3565 ts = bfd_get_section_by_name (output_bfd, entry_section);
3566 if (ts != (asection *) NULL)
3569 einfo (_("%P: warning: cannot find entry symbol %s; defaulting to %V\n"),
3571 bfd_get_section_vma (output_bfd, ts));
3572 if (! bfd_set_start_address (output_bfd,
3573 bfd_get_section_vma (output_bfd,
3575 einfo (_("%P%F: can't set start address\n"));
3580 einfo (_("%P: warning: cannot find entry symbol %s; not setting start address\n"),
3587 /* This is a small function used when we want to ignore errors from
3591 #ifdef ANSI_PROTOTYPES
3592 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED, ...)
3594 ignore_bfd_errors (s)
3595 const char *s ATTRIBUTE_UNUSED;
3598 /* Don't do anything. */
3601 /* Check that the architecture of all the input files is compatible
3602 with the output file. Also call the backend to let it do any
3603 other checking that is needed. */
3608 lang_statement_union_type *file;
3610 const bfd_arch_info_type *compatible;
3612 for (file = file_chain.head;
3613 file != (lang_statement_union_type *) NULL;
3614 file = file->input_statement.next)
3616 input_bfd = file->input_statement.the_bfd;
3617 compatible = bfd_arch_get_compatible (input_bfd, output_bfd);
3619 /* In general it is not possible to perform a relocatable
3620 link between differing object formats when the input
3621 file has relocations, because the relocations in the
3622 input format may not have equivalent representations in
3623 the output format (and besides BFD does not translate
3624 relocs for other link purposes than a final link). */
3625 if ((link_info.relocateable || link_info.emitrelocations)
3626 && (compatible == NULL
3627 || bfd_get_flavour (input_bfd) != bfd_get_flavour (output_bfd))
3628 && (bfd_get_file_flags (input_bfd) & HAS_RELOC) != 0)
3630 einfo (_("%P%F: Relocatable linking with relocations from format %s (%B) to format %s (%B) is not supported\n"),
3631 bfd_get_target (input_bfd), input_bfd,
3632 bfd_get_target (output_bfd), output_bfd);
3633 /* einfo with %F exits. */
3636 if (compatible == NULL)
3638 if (command_line.warn_mismatch)
3639 einfo (_("%P: warning: %s architecture of input file `%B' is incompatible with %s output\n"),
3640 bfd_printable_name (input_bfd), input_bfd,
3641 bfd_printable_name (output_bfd));
3643 else if (bfd_count_sections (input_bfd))
3645 /* If the input bfd has no contents, it shouldn't set the
3646 private data of the output bfd. */
3648 bfd_error_handler_type pfn = NULL;
3650 /* If we aren't supposed to warn about mismatched input
3651 files, temporarily set the BFD error handler to a
3652 function which will do nothing. We still want to call
3653 bfd_merge_private_bfd_data, since it may set up
3654 information which is needed in the output file. */
3655 if (! command_line.warn_mismatch)
3656 pfn = bfd_set_error_handler (ignore_bfd_errors);
3657 if (! bfd_merge_private_bfd_data (input_bfd, output_bfd))
3659 if (command_line.warn_mismatch)
3660 einfo (_("%E%X: failed to merge target specific data of file %B\n"),
3663 if (! command_line.warn_mismatch)
3664 bfd_set_error_handler (pfn);
3669 /* Look through all the global common symbols and attach them to the
3670 correct section. The -sort-common command line switch may be used
3671 to roughly sort the entries by size. */
3676 if (command_line.inhibit_common_definition)
3678 if (link_info.relocateable
3679 && ! command_line.force_common_definition)
3682 if (! config.sort_common)
3683 bfd_link_hash_traverse (link_info.hash, lang_one_common, (PTR) NULL);
3688 for (power = 4; power >= 0; power--)
3689 bfd_link_hash_traverse (link_info.hash, lang_one_common,
3694 /* Place one common symbol in the correct section. */
3697 lang_one_common (h, info)
3698 struct bfd_link_hash_entry *h;
3701 unsigned int power_of_two;
3704 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
3705 ldfile_output_machine);
3707 if (h->type != bfd_link_hash_common)
3711 power_of_two = h->u.c.p->alignment_power;
3713 if (config.sort_common
3714 && power_of_two < (unsigned int) *(int *) info)
3717 section = h->u.c.p->section;
3719 /* Increase the size of the section. */
3720 section->_cooked_size = ALIGN_N ((section->_cooked_size + opb - 1) / opb,
3721 (bfd_size_type) (1 << power_of_two)) * opb;
3723 /* Adjust the alignment if necessary. */
3724 if (power_of_two > section->alignment_power)
3725 section->alignment_power = power_of_two;
3727 /* Change the symbol from common to defined. */
3728 h->type = bfd_link_hash_defined;
3729 h->u.def.section = section;
3730 h->u.def.value = section->_cooked_size;
3732 /* Increase the size of the section. */
3733 section->_cooked_size += size;
3735 /* Make sure the section is allocated in memory, and make sure that
3736 it is no longer a common section. */
3737 section->flags |= SEC_ALLOC;
3738 section->flags &= ~SEC_IS_COMMON;
3740 if (config.map_file != NULL)
3742 static boolean header_printed;
3747 if (! header_printed)
3749 minfo (_("\nAllocating common symbols\n"));
3750 minfo (_("Common symbol size file\n\n"));
3751 header_printed = true;
3754 name = demangle (h->root.string);
3756 len = strlen (name);
3771 if (size <= 0xffffffff)
3772 sprintf (buf, "%lx", (unsigned long) size);
3774 sprintf_vma (buf, size);
3784 minfo ("%B\n", section->owner);
3790 /* Run through the input files and ensure that every input section has
3791 somewhere to go. If one is found without a destination then create
3792 an input request and place it into the statement tree. */
3795 lang_place_orphans ()
3797 LANG_FOR_EACH_INPUT_STATEMENT (file)
3801 for (s = file->the_bfd->sections;
3802 s != (asection *) NULL;
3805 if (s->output_section == (asection *) NULL)
3807 /* This section of the file is not attatched, root
3808 around for a sensible place for it to go. */
3810 if (file->just_syms_flag)
3814 else if (strcmp (s->name, "COMMON") == 0)
3816 /* This is a lonely common section which must have
3817 come from an archive. We attach to the section
3818 with the wildcard. */
3819 if (! link_info.relocateable
3820 || command_line.force_common_definition)
3822 if (default_common_section == NULL)
3825 /* This message happens when using the
3826 svr3.ifile linker script, so I have
3828 info_msg (_("%P: no [COMMON] command, defaulting to .bss\n"));
3830 default_common_section =
3831 lang_output_section_statement_lookup (".bss");
3834 lang_add_section (&default_common_section->children, s,
3835 default_common_section, file);
3838 else if (ldemul_place_orphan (file, s))
3842 lang_output_section_statement_type *os;
3844 os = lang_output_section_statement_lookup (s->name);
3845 lang_add_section (&os->children, s, os, file);
3853 lang_set_flags (ptr, flags, invert)
3854 lang_memory_region_type *ptr;
3858 flagword *ptr_flags;
3860 ptr_flags = invert ? &ptr->not_flags : &ptr->flags;
3866 *ptr_flags |= SEC_ALLOC;
3870 *ptr_flags |= SEC_READONLY;
3874 *ptr_flags |= SEC_DATA;
3878 *ptr_flags |= SEC_CODE;
3883 *ptr_flags |= SEC_LOAD;
3887 einfo (_("%P%F: invalid syntax in flags\n"));
3894 /* Call a function on each input file. This function will be called
3895 on an archive, but not on the elements. */
3898 lang_for_each_input_file (func)
3899 void (*func) PARAMS ((lang_input_statement_type *));
3901 lang_input_statement_type *f;
3903 for (f = (lang_input_statement_type *) input_file_chain.head;
3905 f = (lang_input_statement_type *) f->next_real_file)
3909 /* Call a function on each file. The function will be called on all
3910 the elements of an archive which are included in the link, but will
3911 not be called on the archive file itself. */
3914 lang_for_each_file (func)
3915 void (*func) PARAMS ((lang_input_statement_type *));
3917 LANG_FOR_EACH_INPUT_STATEMENT (f)
3928 lang_for_each_input_section (func)
3929 void (*func) PARAMS ((bfd *ab, asection *as));
3931 LANG_FOR_EACH_INPUT_STATEMENT (f)
3935 for (s = f->the_bfd->sections;
3936 s != (asection *) NULL;
3939 func (f->the_bfd, s);
3947 ldlang_add_file (entry)
3948 lang_input_statement_type *entry;
3952 lang_statement_append (&file_chain,
3953 (lang_statement_union_type *) entry,
3956 /* The BFD linker needs to have a list of all input BFDs involved in
3958 ASSERT (entry->the_bfd->link_next == (bfd *) NULL);
3959 ASSERT (entry->the_bfd != output_bfd);
3960 for (pp = &link_info.input_bfds;
3961 *pp != (bfd *) NULL;
3962 pp = &(*pp)->link_next)
3964 *pp = entry->the_bfd;
3965 entry->the_bfd->usrdata = (PTR) entry;
3966 bfd_set_gp_size (entry->the_bfd, g_switch_value);
3968 /* Look through the sections and check for any which should not be
3969 included in the link. We need to do this now, so that we can
3970 notice when the backend linker tries to report multiple
3971 definition errors for symbols which are in sections we aren't
3972 going to link. FIXME: It might be better to entirely ignore
3973 symbols which are defined in sections which are going to be
3974 discarded. This would require modifying the backend linker for
3975 each backend which might set the SEC_LINK_ONCE flag. If we do
3976 this, we should probably handle SEC_EXCLUDE in the same way. */
3978 bfd_map_over_sections (entry->the_bfd, section_already_linked, (PTR) entry);
3982 lang_add_output (name, from_script)
3986 /* Make -o on command line override OUTPUT in script. */
3987 if (had_output_filename == false || !from_script)
3989 output_filename = name;
3990 had_output_filename = true;
3994 static lang_output_section_statement_type *current_section;
4006 for (l = 0; l < 32; l++)
4008 if (i >= (unsigned int) x)
4016 lang_output_section_statement_type *
4017 lang_enter_output_section_statement (output_section_statement_name,
4018 address_exp, sectype, block_value,
4019 align, subalign, ebase)
4020 const char *output_section_statement_name;
4021 etree_type *address_exp;
4022 enum section_type sectype;
4023 bfd_vma block_value;
4025 etree_type *subalign;
4028 lang_output_section_statement_type *os;
4032 lang_output_section_statement_lookup (output_section_statement_name);
4034 /* Add this statement to tree. */
4036 add_statement (lang_output_section_statement_enum,
4037 output_section_statement);
4039 /* Make next things chain into subchain of this. */
4041 if (os->addr_tree == (etree_type *) NULL)
4043 os->addr_tree = address_exp;
4045 os->sectype = sectype;
4046 if (sectype != noload_section)
4047 os->flags = SEC_NO_FLAGS;
4049 os->flags = SEC_NEVER_LOAD;
4050 os->block_value = block_value ? block_value : 1;
4051 stat_ptr = &os->children;
4053 os->subsection_alignment =
4054 topower (exp_get_value_int (subalign, -1, "subsection alignment", 0));
4055 os->section_alignment =
4056 topower (exp_get_value_int (align, -1, "section alignment", 0));
4058 os->load_base = ebase;
4065 lang_output_statement_type *new =
4066 new_stat (lang_output_statement, stat_ptr);
4068 new->name = output_filename;
4071 /* Reset the current counters in the regions. */
4074 lang_reset_memory_regions ()
4076 lang_memory_region_type *p = lang_memory_region_list;
4079 for (p = lang_memory_region_list;
4080 p != (lang_memory_region_type *) NULL;
4083 p->old_length = (bfd_size_type) (p->current - p->origin);
4084 p->current = p->origin;
4087 for (o = output_bfd->sections; o != NULL; o = o->next)
4091 /* If the wild pattern was marked KEEP, the member sections
4092 should be as well. */
4095 gc_section_callback (ptr, sec, section, file, data)
4096 lang_wild_statement_type *ptr;
4097 struct wildcard_list *sec ATTRIBUTE_UNUSED;
4099 lang_input_statement_type *file ATTRIBUTE_UNUSED;
4100 PTR data ATTRIBUTE_UNUSED;
4102 if (ptr->keep_sections)
4103 section->flags |= SEC_KEEP;
4106 /* Handle a wild statement, marking it against GC. */
4110 lang_wild_statement_type *s;
4112 walk_wild (s, gc_section_callback, NULL);
4115 /* Iterate over sections marking them against GC. */
4118 lang_gc_sections_1 (s)
4119 lang_statement_union_type *s;
4121 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
4123 switch (s->header.type)
4125 case lang_wild_statement_enum:
4126 lang_gc_wild (&s->wild_statement);
4128 case lang_constructors_statement_enum:
4129 lang_gc_sections_1 (constructor_list.head);
4131 case lang_output_section_statement_enum:
4132 lang_gc_sections_1 (s->output_section_statement.children.head);
4134 case lang_group_statement_enum:
4135 lang_gc_sections_1 (s->group_statement.children.head);
4146 struct bfd_link_hash_entry *h;
4147 ldlang_undef_chain_list_type *ulist;
4149 /* Keep all sections so marked in the link script. */
4151 lang_gc_sections_1 (statement_list.head);
4153 /* Keep all sections containing symbols undefined on the command-line,
4154 and the section containing the entry symbol. */
4156 for (ulist = link_info.gc_sym_list; ulist; ulist = ulist->next)
4158 h = bfd_link_hash_lookup (link_info.hash, ulist->name,
4159 false, false, false);
4161 if (h != (struct bfd_link_hash_entry *) NULL
4162 && (h->type == bfd_link_hash_defined
4163 || h->type == bfd_link_hash_defweak)
4164 && ! bfd_is_abs_section (h->u.def.section))
4166 h->u.def.section->flags |= SEC_KEEP;
4170 bfd_gc_sections (output_bfd, &link_info);
4176 lang_reasonable_defaults ();
4177 current_target = default_target;
4179 /* Open the output file. */
4180 lang_for_each_statement (ldlang_open_output);
4182 ldemul_create_output_section_statements ();
4184 /* Add to the hash table all undefineds on the command line. */
4185 lang_place_undefineds ();
4187 already_linked_table_init ();
4189 /* Create a bfd for each input file. */
4190 current_target = default_target;
4191 open_input_bfds (statement_list.head, false);
4193 link_info.gc_sym_list = &entry_symbol;
4194 if (entry_symbol.name == NULL)
4195 link_info.gc_sym_list = ldlang_undef_chain_list_head;
4197 ldemul_after_open ();
4199 already_linked_table_free ();
4201 /* Make sure that we're not mixing architectures. We call this
4202 after all the input files have been opened, but before we do any
4203 other processing, so that any operations merge_private_bfd_data
4204 does on the output file will be known during the rest of the
4208 /* Handle .exports instead of a version script if we're told to do so. */
4209 if (command_line.version_exports_section)
4210 lang_do_version_exports_section ();
4212 /* Build all sets based on the information gathered from the input
4214 ldctor_build_sets ();
4216 /* Remove unreferenced sections if asked to. */
4217 if (command_line.gc_sections)
4218 lang_gc_sections ();
4220 /* If there were any SEC_MERGE sections, finish their merging, so that
4221 section sizes can be computed. This has to be done after GC of sections,
4222 so that GCed sections are not merged, but before assigning output
4223 sections, since removing whole input sections is hard then. */
4224 bfd_merge_sections (output_bfd, &link_info);
4226 /* Size up the common data. */
4229 /* Run through the contours of the script and attach input sections
4230 to the correct output sections. */
4231 map_input_to_output_sections (statement_list.head, (char *) NULL,
4232 (lang_output_section_statement_type *) NULL);
4234 /* Find any sections not attached explicitly and handle them. */
4235 lang_place_orphans ();
4237 if (! link_info.relocateable)
4239 /* Look for a text section and set the readonly attribute in it. */
4240 asection *found = bfd_get_section_by_name (output_bfd, ".text");
4242 if (found != (asection *) NULL)
4244 if (config.text_read_only)
4245 found->flags |= SEC_READONLY;
4247 found->flags &= ~SEC_READONLY;
4251 /* Do anything special before sizing sections. This is where ELF
4252 and other back-ends size dynamic sections. */
4253 ldemul_before_allocation ();
4255 /* We must record the program headers before we try to fix the
4256 section positions, since they will affect SIZEOF_HEADERS. */
4257 lang_record_phdrs ();
4259 /* Size up the sections. */
4260 lang_size_sections (statement_list.head,
4262 &statement_list.head, 0, (bfd_vma) 0, NULL);
4264 /* Now run around and relax if we can. */
4265 if (command_line.relax)
4267 /* Keep relaxing until bfd_relax_section gives up. */
4268 boolean relax_again;
4272 lang_reset_memory_regions ();
4274 relax_again = false;
4276 /* Note: pe-dll.c does something like this also. If you find
4277 you need to change this code, you probably need to change
4278 pe-dll.c also. DJ */
4280 /* Do all the assignments with our current guesses as to
4282 lang_do_assignments (statement_list.head,
4284 (fill_type *) 0, (bfd_vma) 0);
4286 /* Perform another relax pass - this time we know where the
4287 globals are, so can make a better guess. */
4288 lang_size_sections (statement_list.head,
4290 &statement_list.head, 0, (bfd_vma) 0,
4293 while (relax_again);
4296 /* See if anything special should be done now we know how big
4298 ldemul_after_allocation ();
4300 /* Fix any .startof. or .sizeof. symbols. */
4301 lang_set_startof ();
4303 /* Do all the assignments, now that we know the final resting places
4304 of all the symbols. */
4306 lang_do_assignments (statement_list.head,
4308 (fill_type *) 0, (bfd_vma) 0);
4310 /* Make sure that the section addresses make sense. */
4311 if (! link_info.relocateable
4312 && command_line.check_section_addresses)
4313 lang_check_section_addresses ();
4321 /* EXPORTED TO YACC */
4324 lang_add_wild (filespec, section_list, keep_sections)
4325 struct wildcard_spec *filespec;
4326 struct wildcard_list *section_list;
4327 boolean keep_sections;
4329 struct wildcard_list *curr, *next;
4330 lang_wild_statement_type *new;
4332 /* Reverse the list as the parser puts it back to front. */
4333 for (curr = section_list, section_list = NULL;
4335 section_list = curr, curr = next)
4337 if (curr->spec.name != NULL && strcmp (curr->spec.name, "COMMON") == 0)
4338 placed_commons = true;
4341 curr->next = section_list;
4344 if (filespec != NULL && filespec->name != NULL)
4346 if (strcmp (filespec->name, "*") == 0)
4347 filespec->name = NULL;
4348 else if (! wildcardp (filespec->name))
4349 lang_has_input_file = true;
4352 new = new_stat (lang_wild_statement, stat_ptr);
4353 new->filename = NULL;
4354 new->filenames_sorted = false;
4355 if (filespec != NULL)
4357 new->filename = filespec->name;
4358 new->filenames_sorted = filespec->sorted;
4360 new->section_list = section_list;
4361 new->keep_sections = keep_sections;
4362 lang_list_init (&new->children);
4366 lang_section_start (name, address)
4368 etree_type *address;
4370 lang_address_statement_type *ad;
4372 ad = new_stat (lang_address_statement, stat_ptr);
4373 ad->section_name = name;
4374 ad->address = address;
4377 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
4378 because of a -e argument on the command line, or zero if this is
4379 called by ENTRY in a linker script. Command line arguments take
4383 lang_add_entry (name, cmdline)
4387 if (entry_symbol.name == NULL
4389 || ! entry_from_cmdline)
4391 entry_symbol.name = name;
4392 entry_from_cmdline = cmdline;
4397 lang_add_target (name)
4400 lang_target_statement_type *new = new_stat (lang_target_statement,
4416 map_option_f = true;
4424 lang_add_fill (fill)
4427 lang_fill_statement_type *new = new_stat (lang_fill_statement,
4434 lang_add_data (type, exp)
4436 union etree_union *exp;
4439 lang_data_statement_type *new = new_stat (lang_data_statement,
4447 /* Create a new reloc statement. RELOC is the BFD relocation type to
4448 generate. HOWTO is the corresponding howto structure (we could
4449 look this up, but the caller has already done so). SECTION is the
4450 section to generate a reloc against, or NAME is the name of the
4451 symbol to generate a reloc against. Exactly one of SECTION and
4452 NAME must be NULL. ADDEND is an expression for the addend. */
4455 lang_add_reloc (reloc, howto, section, name, addend)
4456 bfd_reloc_code_real_type reloc;
4457 reloc_howto_type *howto;
4460 union etree_union *addend;
4462 lang_reloc_statement_type *p = new_stat (lang_reloc_statement, stat_ptr);
4466 p->section = section;
4468 p->addend_exp = addend;
4470 p->addend_value = 0;
4471 p->output_section = NULL;
4475 lang_assignment_statement_type *
4476 lang_add_assignment (exp)
4479 lang_assignment_statement_type *new = new_stat (lang_assignment_statement,
4487 lang_add_attribute (attribute)
4488 enum statement_enum attribute;
4490 new_statement (attribute, sizeof (lang_statement_union_type), stat_ptr);
4497 if (startup_file != (char *) NULL)
4499 einfo (_("%P%Fmultiple STARTUP files\n"));
4501 first_file->filename = name;
4502 first_file->local_sym_name = name;
4503 first_file->real = true;
4505 startup_file = name;
4512 lang_float_flag = maybe;
4516 /* Work out the load- and run-time regions from a script statement, and
4517 store them in *LMA_REGION and *REGION respectively.
4519 MEMSPEC is the name of the run-time region, or "*default*" if the
4520 statement didn't specify one. LMA_MEMSPEC is the name of the
4521 load-time region, or null if the statement didn't specify one.
4522 HAVE_LMA_P is true if the statement had an explicit load address.
4524 It is an error to specify both a load region and a load address. */
4527 lang_get_regions (region, lma_region, memspec, lma_memspec, have_lma_p)
4528 struct memory_region_struct **region, **lma_region;
4529 const char *memspec, *lma_memspec;
4532 *lma_region = lang_memory_region_lookup (lma_memspec);
4534 /* If no runtime region has been given, but the load region has
4535 been, use the load region. */
4536 if (lma_memspec != 0 && strcmp (memspec, "*default*") == 0)
4537 *region = *lma_region;
4539 *region = lang_memory_region_lookup (memspec);
4541 if (have_lma_p && lma_memspec != 0)
4542 einfo (_("%X%P:%S: section has both a load address and a load region\n"));
4546 lang_leave_output_section_statement (fill, memspec, phdrs, lma_memspec)
4548 const char *memspec;
4549 struct lang_output_section_phdr_list *phdrs;
4550 const char *lma_memspec;
4552 lang_get_regions (¤t_section->region,
4553 ¤t_section->lma_region,
4554 memspec, lma_memspec,
4555 current_section->load_base != 0);
4556 current_section->fill = fill;
4557 current_section->phdrs = phdrs;
4558 stat_ptr = &statement_list;
4561 /* Create an absolute symbol with the given name with the value of the
4562 address of first byte of the section named.
4564 If the symbol already exists, then do nothing. */
4567 lang_abs_symbol_at_beginning_of (secname, name)
4568 const char *secname;
4571 struct bfd_link_hash_entry *h;
4573 h = bfd_link_hash_lookup (link_info.hash, name, true, true, true);
4574 if (h == (struct bfd_link_hash_entry *) NULL)
4575 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4577 if (h->type == bfd_link_hash_new
4578 || h->type == bfd_link_hash_undefined)
4582 h->type = bfd_link_hash_defined;
4584 sec = bfd_get_section_by_name (output_bfd, secname);
4585 if (sec == (asection *) NULL)
4588 h->u.def.value = bfd_get_section_vma (output_bfd, sec);
4590 h->u.def.section = bfd_abs_section_ptr;
4594 /* Create an absolute symbol with the given name with the value of the
4595 address of the first byte after the end of the section named.
4597 If the symbol already exists, then do nothing. */
4600 lang_abs_symbol_at_end_of (secname, name)
4601 const char *secname;
4604 struct bfd_link_hash_entry *h;
4606 h = bfd_link_hash_lookup (link_info.hash, name, true, true, true);
4607 if (h == (struct bfd_link_hash_entry *) NULL)
4608 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4610 if (h->type == bfd_link_hash_new
4611 || h->type == bfd_link_hash_undefined)
4615 h->type = bfd_link_hash_defined;
4617 sec = bfd_get_section_by_name (output_bfd, secname);
4618 if (sec == (asection *) NULL)
4621 h->u.def.value = (bfd_get_section_vma (output_bfd, sec)
4622 + bfd_section_size (output_bfd, sec) /
4623 bfd_octets_per_byte (output_bfd));
4625 h->u.def.section = bfd_abs_section_ptr;
4630 lang_statement_append (list, element, field)
4631 lang_statement_list_type *list;
4632 lang_statement_union_type *element;
4633 lang_statement_union_type **field;
4635 *(list->tail) = element;
4639 /* Set the output format type. -oformat overrides scripts. */
4642 lang_add_output_format (format, big, little, from_script)
4648 if (output_target == NULL || !from_script)
4650 if (command_line.endian == ENDIAN_BIG
4653 else if (command_line.endian == ENDIAN_LITTLE
4657 output_target = format;
4661 /* Enter a group. This creates a new lang_group_statement, and sets
4662 stat_ptr to build new statements within the group. */
4667 lang_group_statement_type *g;
4669 g = new_stat (lang_group_statement, stat_ptr);
4670 lang_list_init (&g->children);
4671 stat_ptr = &g->children;
4674 /* Leave a group. This just resets stat_ptr to start writing to the
4675 regular list of statements again. Note that this will not work if
4676 groups can occur inside anything else which can adjust stat_ptr,
4677 but currently they can't. */
4682 stat_ptr = &statement_list;
4685 /* Add a new program header. This is called for each entry in a PHDRS
4686 command in a linker script. */
4689 lang_new_phdr (name, type, filehdr, phdrs, at, flags)
4697 struct lang_phdr *n, **pp;
4699 n = (struct lang_phdr *) stat_alloc (sizeof (struct lang_phdr));
4702 n->type = exp_get_value_int (type, 0, "program header type",
4703 lang_final_phase_enum);
4704 n->filehdr = filehdr;
4709 for (pp = &lang_phdr_list; *pp != NULL; pp = &(*pp)->next)
4714 /* Record the program header information in the output BFD. FIXME: We
4715 should not be calling an ELF specific function here. */
4718 lang_record_phdrs ()
4722 struct lang_output_section_phdr_list *last;
4723 struct lang_phdr *l;
4724 lang_statement_union_type *u;
4727 secs = (asection **) xmalloc (alc * sizeof (asection *));
4729 for (l = lang_phdr_list; l != NULL; l = l->next)
4736 for (u = lang_output_section_statement.head;
4738 u = u->output_section_statement.next)
4740 lang_output_section_statement_type *os;
4741 struct lang_output_section_phdr_list *pl;
4743 os = &u->output_section_statement;
4750 if (os->sectype == noload_section
4751 || os->bfd_section == NULL
4752 || (os->bfd_section->flags & SEC_ALLOC) == 0)
4757 if (os->bfd_section == NULL)
4760 for (; pl != NULL; pl = pl->next)
4762 if (strcmp (pl->name, l->name) == 0)
4767 secs = ((asection **)
4768 xrealloc (secs, alc * sizeof (asection *)));
4770 secs[c] = os->bfd_section;
4777 if (l->flags == NULL)
4780 flags = exp_get_vma (l->flags, 0, "phdr flags",
4781 lang_final_phase_enum);
4786 at = exp_get_vma (l->at, 0, "phdr load address",
4787 lang_final_phase_enum);
4789 if (! bfd_record_phdr (output_bfd, l->type,
4790 l->flags != NULL, flags, l->at != NULL,
4791 at, l->filehdr, l->phdrs, c, secs))
4792 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
4797 /* Make sure all the phdr assignments succeeded. */
4798 for (u = lang_output_section_statement.head;
4800 u = u->output_section_statement.next)
4802 struct lang_output_section_phdr_list *pl;
4804 if (u->output_section_statement.bfd_section == NULL)
4807 for (pl = u->output_section_statement.phdrs;
4810 if (! pl->used && strcmp (pl->name, "NONE") != 0)
4811 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
4812 u->output_section_statement.name, pl->name);
4816 /* Record a list of sections which may not be cross referenced. */
4819 lang_add_nocrossref (l)
4820 struct lang_nocrossref *l;
4822 struct lang_nocrossrefs *n;
4824 n = (struct lang_nocrossrefs *) xmalloc (sizeof *n);
4825 n->next = nocrossref_list;
4827 nocrossref_list = n;
4829 /* Set notice_all so that we get informed about all symbols. */
4830 link_info.notice_all = true;
4833 /* Overlay handling. We handle overlays with some static variables. */
4835 /* The overlay virtual address. */
4836 static etree_type *overlay_vma;
4838 /* An expression for the maximum section size seen so far. */
4839 static etree_type *overlay_max;
4841 /* A list of all the sections in this overlay. */
4843 struct overlay_list {
4844 struct overlay_list *next;
4845 lang_output_section_statement_type *os;
4848 static struct overlay_list *overlay_list;
4850 /* Start handling an overlay. */
4853 lang_enter_overlay (vma_expr)
4854 etree_type *vma_expr;
4856 /* The grammar should prevent nested overlays from occurring. */
4857 ASSERT (overlay_vma == NULL && overlay_max == NULL);
4859 overlay_vma = vma_expr;
4862 /* Start a section in an overlay. We handle this by calling
4863 lang_enter_output_section_statement with the correct VMA.
4864 lang_leave_overlay sets up the LMA and memory regions. */
4867 lang_enter_overlay_section (name)
4870 struct overlay_list *n;
4873 lang_enter_output_section_statement (name, overlay_vma, normal_section,
4876 /* If this is the first section, then base the VMA of future
4877 sections on this one. This will work correctly even if `.' is
4878 used in the addresses. */
4879 if (overlay_list == NULL)
4880 overlay_vma = exp_nameop (ADDR, name);
4882 /* Remember the section. */
4883 n = (struct overlay_list *) xmalloc (sizeof *n);
4884 n->os = current_section;
4885 n->next = overlay_list;
4888 size = exp_nameop (SIZEOF, name);
4890 /* Arrange to work out the maximum section end address. */
4891 if (overlay_max == NULL)
4894 overlay_max = exp_binop (MAX_K, overlay_max, size);
4897 /* Finish a section in an overlay. There isn't any special to do
4901 lang_leave_overlay_section (fill, phdrs)
4903 struct lang_output_section_phdr_list *phdrs;
4910 name = current_section->name;
4912 /* For now, assume that "*default*" is the run-time memory region and
4913 that no load-time region has been specified. It doesn't really
4914 matter what we say here, since lang_leave_overlay will override it. */
4915 lang_leave_output_section_statement (fill, "*default*", phdrs, 0);
4917 /* Define the magic symbols. */
4919 clean = xmalloc (strlen (name) + 1);
4921 for (s1 = name; *s1 != '\0'; s1++)
4922 if (ISALNUM (*s1) || *s1 == '_')
4926 buf = xmalloc (strlen (clean) + sizeof "__load_start_");
4927 sprintf (buf, "__load_start_%s", clean);
4928 lang_add_assignment (exp_assop ('=', buf,
4929 exp_nameop (LOADADDR, name)));
4931 buf = xmalloc (strlen (clean) + sizeof "__load_stop_");
4932 sprintf (buf, "__load_stop_%s", clean);
4933 lang_add_assignment (exp_assop ('=', buf,
4935 exp_nameop (LOADADDR, name),
4936 exp_nameop (SIZEOF, name))));
4941 /* Finish an overlay. If there are any overlay wide settings, this
4942 looks through all the sections in the overlay and sets them. */
4945 lang_leave_overlay (lma_expr, nocrossrefs, fill, memspec, phdrs, lma_memspec)
4946 etree_type *lma_expr;
4949 const char *memspec;
4950 struct lang_output_section_phdr_list *phdrs;
4951 const char *lma_memspec;
4953 lang_memory_region_type *region;
4954 lang_memory_region_type *lma_region;
4955 struct overlay_list *l;
4956 struct lang_nocrossref *nocrossref;
4958 lang_get_regions (®ion, &lma_region,
4959 memspec, lma_memspec,
4964 /* After setting the size of the last section, set '.' to end of the
4966 if (overlay_list != NULL)
4967 overlay_list->os->update_dot_tree
4968 = exp_assop ('=', ".", exp_binop ('+', overlay_vma, overlay_max));
4973 struct overlay_list *next;
4975 if (fill != (fill_type *) 0 && l->os->fill == (fill_type *) 0)
4978 l->os->region = region;
4979 l->os->lma_region = lma_region;
4981 /* The first section has the load address specified in the
4982 OVERLAY statement. The rest are worked out from that.
4983 The base address is not needed (and should be null) if
4984 an LMA region was specified. */
4986 l->os->load_base = lma_expr;
4987 else if (lma_region == 0)
4988 l->os->load_base = exp_binop ('+',
4989 exp_nameop (LOADADDR, l->next->os->name),
4990 exp_nameop (SIZEOF, l->next->os->name));
4992 if (phdrs != NULL && l->os->phdrs == NULL)
4993 l->os->phdrs = phdrs;
4997 struct lang_nocrossref *nc;
4999 nc = (struct lang_nocrossref *) xmalloc (sizeof *nc);
5000 nc->name = l->os->name;
5001 nc->next = nocrossref;
5010 if (nocrossref != NULL)
5011 lang_add_nocrossref (nocrossref);
5014 overlay_list = NULL;
5018 /* Version handling. This is only useful for ELF. */
5020 /* This global variable holds the version tree that we build. */
5022 struct bfd_elf_version_tree *lang_elf_version_info;
5025 lang_vers_match_lang_c (expr, sym)
5026 struct bfd_elf_version_expr *expr;
5029 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
5031 return fnmatch (expr->pattern, sym, 0) == 0;
5035 lang_vers_match_lang_cplusplus (expr, sym)
5036 struct bfd_elf_version_expr *expr;
5042 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
5045 alt_sym = cplus_demangle (sym, /* DMGL_NO_TPARAMS */ 0);
5048 /* cplus_demangle (also) returns NULL when it is not a C++ symbol.
5049 Should we early out false in this case? */
5050 result = fnmatch (expr->pattern, sym, 0) == 0;
5054 result = fnmatch (expr->pattern, alt_sym, 0) == 0;
5062 lang_vers_match_lang_java (expr, sym)
5063 struct bfd_elf_version_expr *expr;
5069 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
5072 alt_sym = cplus_demangle (sym, DMGL_JAVA);
5075 /* cplus_demangle (also) returns NULL when it is not a Java symbol.
5076 Should we early out false in this case? */
5077 result = fnmatch (expr->pattern, sym, 0) == 0;
5081 result = fnmatch (expr->pattern, alt_sym, 0) == 0;
5088 /* This is called for each variable name or match expression. */
5090 struct bfd_elf_version_expr *
5091 lang_new_vers_pattern (orig, new, lang)
5092 struct bfd_elf_version_expr *orig;
5096 struct bfd_elf_version_expr *ret;
5098 ret = (struct bfd_elf_version_expr *) xmalloc (sizeof *ret);
5102 if (lang == NULL || strcasecmp (lang, "C") == 0)
5103 ret->match = lang_vers_match_lang_c;
5104 else if (strcasecmp (lang, "C++") == 0)
5105 ret->match = lang_vers_match_lang_cplusplus;
5106 else if (strcasecmp (lang, "Java") == 0)
5107 ret->match = lang_vers_match_lang_java;
5110 einfo (_("%X%P: unknown language `%s' in version information\n"),
5112 ret->match = lang_vers_match_lang_c;
5115 return ldemul_new_vers_pattern (ret);
5118 /* This is called for each set of variable names and match
5121 struct bfd_elf_version_tree *
5122 lang_new_vers_node (globals, locals)
5123 struct bfd_elf_version_expr *globals;
5124 struct bfd_elf_version_expr *locals;
5126 struct bfd_elf_version_tree *ret;
5128 ret = (struct bfd_elf_version_tree *) xmalloc (sizeof *ret);
5132 ret->globals = globals;
5133 ret->locals = locals;
5135 ret->name_indx = (unsigned int) -1;
5140 /* This static variable keeps track of version indices. */
5142 static int version_index;
5144 /* This is called when we know the name and dependencies of the
5148 lang_register_vers_node (name, version, deps)
5150 struct bfd_elf_version_tree *version;
5151 struct bfd_elf_version_deps *deps;
5153 struct bfd_elf_version_tree *t, **pp;
5154 struct bfd_elf_version_expr *e1;
5159 if ((name[0] == '\0' && lang_elf_version_info != NULL)
5160 || (lang_elf_version_info && lang_elf_version_info->name[0] == '\0'))
5162 einfo (_("%X%P: anonymous version tag cannot be combined with other version tags\n"));
5166 /* Make sure this node has a unique name. */
5167 for (t = lang_elf_version_info; t != NULL; t = t->next)
5168 if (strcmp (t->name, name) == 0)
5169 einfo (_("%X%P: duplicate version tag `%s'\n"), name);
5171 /* Check the global and local match names, and make sure there
5172 aren't any duplicates. */
5174 for (e1 = version->globals; e1 != NULL; e1 = e1->next)
5176 for (t = lang_elf_version_info; t != NULL; t = t->next)
5178 struct bfd_elf_version_expr *e2;
5180 for (e2 = t->locals; e2 != NULL; e2 = e2->next)
5181 if (strcmp (e1->pattern, e2->pattern) == 0)
5182 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5187 for (e1 = version->locals; e1 != NULL; e1 = e1->next)
5189 for (t = lang_elf_version_info; t != NULL; t = t->next)
5191 struct bfd_elf_version_expr *e2;
5193 for (e2 = t->globals; e2 != NULL; e2 = e2->next)
5194 if (strcmp (e1->pattern, e2->pattern) == 0)
5195 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5200 version->deps = deps;
5201 version->name = name;
5202 if (name[0] != '\0')
5205 version->vernum = version_index;
5208 version->vernum = 0;
5210 for (pp = &lang_elf_version_info; *pp != NULL; pp = &(*pp)->next)
5215 /* This is called when we see a version dependency. */
5217 struct bfd_elf_version_deps *
5218 lang_add_vers_depend (list, name)
5219 struct bfd_elf_version_deps *list;
5222 struct bfd_elf_version_deps *ret;
5223 struct bfd_elf_version_tree *t;
5225 ret = (struct bfd_elf_version_deps *) xmalloc (sizeof *ret);
5228 for (t = lang_elf_version_info; t != NULL; t = t->next)
5230 if (strcmp (t->name, name) == 0)
5232 ret->version_needed = t;
5237 einfo (_("%X%P: unable to find version dependency `%s'\n"), name);
5243 lang_do_version_exports_section ()
5245 struct bfd_elf_version_expr *greg = NULL, *lreg;
5247 LANG_FOR_EACH_INPUT_STATEMENT (is)
5249 asection *sec = bfd_get_section_by_name (is->the_bfd, ".exports");
5256 len = bfd_section_size (is->the_bfd, sec);
5257 contents = xmalloc (len);
5258 if (!bfd_get_section_contents (is->the_bfd, sec, contents, 0, len))
5259 einfo (_("%X%P: unable to read .exports section contents\n"), sec);
5262 while (p < contents + len)
5264 greg = lang_new_vers_pattern (greg, p, NULL);
5265 p = strchr (p, '\0') + 1;
5268 /* Do not free the contents, as we used them creating the regex. */
5270 /* Do not include this section in the link. */
5271 bfd_set_section_flags (is->the_bfd, sec,
5272 bfd_get_section_flags (is->the_bfd, sec) | SEC_EXCLUDE);
5275 lreg = lang_new_vers_pattern (NULL, "*", NULL);
5276 lang_register_vers_node (command_line.version_exports_section,
5277 lang_new_vers_node (greg, lreg), NULL);
5281 lang_add_unique (name)
5284 struct unique_sections *ent;
5286 for (ent = unique_section_list; ent; ent = ent->next)
5287 if (strcmp (ent->name, name) == 0)
5290 ent = (struct unique_sections *) xmalloc (sizeof *ent);
5291 ent->name = xstrdup (name);
5292 ent->next = unique_section_list;
5293 unique_section_list = ent;