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 lang_place_undefineds PARAMS ((void));
96 static void map_input_to_output_sections
97 PARAMS ((lang_statement_union_type *, const char *,
98 lang_output_section_statement_type *));
99 static void print_output_section_statement
100 PARAMS ((lang_output_section_statement_type *));
101 static void print_assignment
102 PARAMS ((lang_assignment_statement_type *,
103 lang_output_section_statement_type *));
104 static void print_input_statement PARAMS ((lang_input_statement_type *));
105 static boolean print_one_symbol PARAMS ((struct bfd_link_hash_entry *, PTR));
106 static void print_input_section PARAMS ((lang_input_section_type *));
107 static void print_fill_statement PARAMS ((lang_fill_statement_type *));
108 static void print_data_statement PARAMS ((lang_data_statement_type *));
109 static void print_address_statement PARAMS ((lang_address_statement_type *));
110 static void print_reloc_statement PARAMS ((lang_reloc_statement_type *));
111 static void print_padding_statement PARAMS ((lang_padding_statement_type *));
112 static void print_wild_statement
113 PARAMS ((lang_wild_statement_type *, lang_output_section_statement_type *));
114 static void print_group
115 PARAMS ((lang_group_statement_type *, lang_output_section_statement_type *));
116 static void print_statement
117 PARAMS ((lang_statement_union_type *, lang_output_section_statement_type *));
118 static void print_statement_list
119 PARAMS ((lang_statement_union_type *, lang_output_section_statement_type *));
120 static void print_statements PARAMS ((void));
121 static void insert_pad
122 PARAMS ((lang_statement_union_type **, fill_type,
123 unsigned int, asection *, bfd_vma));
124 static bfd_vma size_input_section
125 PARAMS ((lang_statement_union_type **, lang_output_section_statement_type *,
126 fill_type, bfd_vma));
127 static void lang_finish PARAMS ((void));
128 static void ignore_bfd_errors PARAMS ((const char *, ...));
129 static void lang_check PARAMS ((void));
130 static void lang_common PARAMS ((void));
131 static boolean lang_one_common PARAMS ((struct bfd_link_hash_entry *, PTR));
132 static void lang_place_orphans PARAMS ((void));
133 static int topower PARAMS ((int));
134 static void lang_set_startof PARAMS ((void));
135 static void reset_memory_regions 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_record_phdrs PARAMS ((void));
140 static void lang_gc_wild PARAMS ((lang_wild_statement_type *));
141 static void lang_gc_sections_1 PARAMS ((lang_statement_union_type *));
142 static void lang_gc_sections PARAMS ((void));
143 static int lang_vers_match_lang_c
144 PARAMS ((struct bfd_elf_version_expr *, const char *));
145 static int lang_vers_match_lang_cplusplus
146 PARAMS ((struct bfd_elf_version_expr *, const char *));
147 static int lang_vers_match_lang_java
148 PARAMS ((struct bfd_elf_version_expr *, const char *));
149 static void lang_do_version_exports_section PARAMS ((void));
150 static void lang_check_section_addresses PARAMS ((void));
151 static void os_region_check
152 PARAMS ((lang_output_section_statement_type *,
153 struct memory_region_struct *, etree_type *, bfd_vma));
155 typedef void (*callback_t) PARAMS ((lang_wild_statement_type *,
156 struct wildcard_list *,
158 lang_input_statement_type *,
160 static void walk_wild
161 PARAMS ((lang_wild_statement_type *, callback_t, PTR));
162 static void walk_wild_section
163 PARAMS ((lang_wild_statement_type *, lang_input_statement_type *,
165 static void walk_wild_file
166 PARAMS ((lang_wild_statement_type *, lang_input_statement_type *,
169 static int get_target PARAMS ((const bfd_target *, PTR));
170 static void stricpy PARAMS ((char *, char *));
171 static void strcut PARAMS ((char *, char *));
172 static int name_compare PARAMS ((char *, char *));
173 static int closest_target_match PARAMS ((const bfd_target *, PTR));
174 static char * get_first_input_target PARAMS ((void));
177 lang_output_section_statement_type *abs_output_section;
178 lang_statement_list_type lang_output_section_statement;
179 lang_statement_list_type *stat_ptr = &statement_list;
180 lang_statement_list_type file_chain = { NULL, NULL };
181 const char *entry_symbol = NULL;
182 boolean entry_from_cmdline;
183 boolean lang_has_input_file = false;
184 boolean had_output_filename = false;
185 boolean lang_float_flag = false;
186 boolean delete_output_file_on_failure = false;
187 struct lang_nocrossrefs *nocrossref_list;
188 struct unique_sections *unique_section_list;
190 etree_type *base; /* Relocation base - or null */
192 #if defined (__STDC__) || defined (ALMOST_STDC)
193 #define cat(a,b) a##b
195 #define cat(a,b) a/**/b
198 /* Don't beautify the line below with "innocent" whitespace, it breaks
199 the K&R C preprocessor! */
200 #define new_stat(x, y) \
201 (cat (x,_type)*) new_statement (cat (x,_enum), sizeof (cat (x,_type)), y)
203 #define outside_section_address(q) \
204 ((q)->output_offset + (q)->output_section->vma)
206 #define outside_symbol_address(q) \
207 ((q)->value + outside_section_address (q->section))
209 #define SECTION_NAME_MAP_LENGTH (16)
215 return obstack_alloc (&stat_obstack, size);
219 unique_section_p (secnam)
222 struct unique_sections *unam;
224 for (unam = unique_section_list; unam; unam = unam->next)
225 if (wildcardp (unam->name)
226 ? fnmatch (unam->name, secnam, 0) == 0
227 : strcmp (unam->name, secnam) == 0)
235 /* Generic traversal routines for finding matching sections. */
238 walk_wild_section (ptr, file, callback, data)
239 lang_wild_statement_type *ptr;
240 lang_input_statement_type *file;
246 if (file->just_syms_flag)
249 for (s = file->the_bfd->sections; s != NULL; s = s->next)
251 struct wildcard_list *sec;
253 sec = ptr->section_list;
255 (*callback) (ptr, sec, s, file, data);
259 boolean skip = false;
260 struct name_list *list_tmp;
262 /* Don't process sections from files which were
264 for (list_tmp = sec->spec.exclude_name_list;
266 list_tmp = list_tmp->next)
268 if (wildcardp (list_tmp->name))
269 skip = fnmatch (list_tmp->name, file->filename, 0) == 0;
271 skip = strcmp (list_tmp->name, file->filename) == 0;
277 if (!skip && sec->spec.name != NULL)
279 const char *sname = bfd_get_section_name (file->the_bfd, s);
281 if (wildcardp (sec->spec.name))
282 skip = fnmatch (sec->spec.name, sname, 0) != 0;
284 skip = strcmp (sec->spec.name, sname) != 0;
288 (*callback) (ptr, sec, s, file, data);
295 /* Handle a wild statement for a single file F. */
298 walk_wild_file (s, f, callback, data)
299 lang_wild_statement_type *s;
300 lang_input_statement_type *f;
304 if (f->the_bfd == NULL
305 || ! bfd_check_format (f->the_bfd, bfd_archive))
306 walk_wild_section (s, f, callback, data);
311 /* This is an archive file. We must map each member of the
312 archive separately. */
313 member = bfd_openr_next_archived_file (f->the_bfd, (bfd *) NULL);
314 while (member != NULL)
316 /* When lookup_name is called, it will call the add_symbols
317 entry point for the archive. For each element of the
318 archive which is included, BFD will call ldlang_add_file,
319 which will set the usrdata field of the member to the
320 lang_input_statement. */
321 if (member->usrdata != NULL)
323 walk_wild_section (s,
324 (lang_input_statement_type *) member->usrdata,
328 member = bfd_openr_next_archived_file (f->the_bfd, member);
334 walk_wild (s, callback, data)
335 lang_wild_statement_type *s;
339 const char *file_spec = s->filename;
341 if (file_spec == NULL)
343 /* Perform the iteration over all files in the list. */
344 LANG_FOR_EACH_INPUT_STATEMENT (f)
346 walk_wild_file (s, f, callback, data);
349 else if (wildcardp (file_spec))
351 LANG_FOR_EACH_INPUT_STATEMENT (f)
353 if (fnmatch (file_spec, f->filename, FNM_FILE_NAME) == 0)
354 walk_wild_file (s, f, callback, data);
359 lang_input_statement_type *f;
361 /* Perform the iteration over a single file. */
362 f = lookup_name (file_spec);
364 walk_wild_file (s, f, callback, data);
368 /* lang_for_each_statement walks the parse tree and calls the provided
369 function for each node. */
372 lang_for_each_statement_worker (func, s)
373 void (*func) PARAMS ((lang_statement_union_type *));
374 lang_statement_union_type *s;
376 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
380 switch (s->header.type)
382 case lang_constructors_statement_enum:
383 lang_for_each_statement_worker (func, constructor_list.head);
385 case lang_output_section_statement_enum:
386 lang_for_each_statement_worker
388 s->output_section_statement.children.head);
390 case lang_wild_statement_enum:
391 lang_for_each_statement_worker
393 s->wild_statement.children.head);
395 case lang_group_statement_enum:
396 lang_for_each_statement_worker (func,
397 s->group_statement.children.head);
399 case lang_data_statement_enum:
400 case lang_reloc_statement_enum:
401 case lang_object_symbols_statement_enum:
402 case lang_output_statement_enum:
403 case lang_target_statement_enum:
404 case lang_input_section_enum:
405 case lang_input_statement_enum:
406 case lang_assignment_statement_enum:
407 case lang_padding_statement_enum:
408 case lang_address_statement_enum:
409 case lang_fill_statement_enum:
419 lang_for_each_statement (func)
420 void (*func) PARAMS ((lang_statement_union_type *));
422 lang_for_each_statement_worker (func, statement_list.head);
425 /*----------------------------------------------------------------------*/
428 lang_list_init (list)
429 lang_statement_list_type *list;
431 list->head = (lang_statement_union_type *) NULL;
432 list->tail = &list->head;
435 /* Build a new statement node for the parse tree. */
437 static lang_statement_union_type *
438 new_statement (type, size, list)
439 enum statement_enum type;
441 lang_statement_list_type *list;
443 lang_statement_union_type *new = (lang_statement_union_type *)
446 new->header.type = type;
447 new->header.next = (lang_statement_union_type *) NULL;
448 lang_statement_append (list, new, &new->header.next);
452 /* Build a new input file node for the language. There are several
453 ways in which we treat an input file, eg, we only look at symbols,
454 or prefix it with a -l etc.
456 We can be supplied with requests for input files more than once;
457 they may, for example be split over serveral lines like foo.o(.text)
458 foo.o(.data) etc, so when asked for a file we check that we haven't
459 got it already so we don't duplicate the bfd. */
461 static lang_input_statement_type *
462 new_afile (name, file_type, target, add_to_list)
464 lang_input_file_enum_type file_type;
468 lang_input_statement_type *p;
471 p = new_stat (lang_input_statement, stat_ptr);
474 p = ((lang_input_statement_type *)
475 stat_alloc (sizeof (lang_input_statement_type)));
476 p->header.next = NULL;
479 lang_has_input_file = true;
483 case lang_input_file_is_symbols_only_enum:
485 p->is_archive = false;
487 p->local_sym_name = name;
488 p->just_syms_flag = true;
489 p->search_dirs_flag = false;
491 case lang_input_file_is_fake_enum:
493 p->is_archive = false;
495 p->local_sym_name = name;
496 p->just_syms_flag = false;
497 p->search_dirs_flag = false;
499 case lang_input_file_is_l_enum:
500 p->is_archive = true;
503 p->local_sym_name = concat ("-l", name, (const char *) NULL);
504 p->just_syms_flag = false;
505 p->search_dirs_flag = true;
507 case lang_input_file_is_marker_enum:
509 p->is_archive = false;
511 p->local_sym_name = name;
512 p->just_syms_flag = false;
513 p->search_dirs_flag = true;
515 case lang_input_file_is_search_file_enum:
517 p->is_archive = false;
519 p->local_sym_name = name;
520 p->just_syms_flag = false;
521 p->search_dirs_flag = true;
523 case lang_input_file_is_file_enum:
525 p->is_archive = false;
527 p->local_sym_name = name;
528 p->just_syms_flag = false;
529 p->search_dirs_flag = false;
534 p->the_bfd = (bfd *) NULL;
535 p->asymbols = (asymbol **) NULL;
536 p->next_real_file = (lang_statement_union_type *) NULL;
537 p->next = (lang_statement_union_type *) NULL;
539 p->dynamic = config.dynamic_link;
540 p->whole_archive = whole_archive;
542 lang_statement_append (&input_file_chain,
543 (lang_statement_union_type *) p,
548 lang_input_statement_type *
549 lang_add_input_file (name, file_type, target)
551 lang_input_file_enum_type file_type;
554 lang_has_input_file = true;
555 return new_afile (name, file_type, target, true);
558 /* Build enough state so that the parser can build its tree. */
563 obstack_begin (&stat_obstack, 1000);
565 stat_ptr = &statement_list;
567 lang_list_init (stat_ptr);
569 lang_list_init (&input_file_chain);
570 lang_list_init (&lang_output_section_statement);
571 lang_list_init (&file_chain);
572 first_file = lang_add_input_file ((char *) NULL,
573 lang_input_file_is_marker_enum,
576 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME);
578 abs_output_section->bfd_section = bfd_abs_section_ptr;
582 /*----------------------------------------------------------------------
583 A region is an area of memory declared with the
584 MEMORY { name:org=exp, len=exp ... }
587 We maintain a list of all the regions here.
589 If no regions are specified in the script, then the default is used
590 which is created when looked up to be the entire data space. */
592 static lang_memory_region_type *lang_memory_region_list;
593 static lang_memory_region_type **lang_memory_region_list_tail = &lang_memory_region_list;
595 lang_memory_region_type *
596 lang_memory_region_lookup (name)
597 const char *const name;
599 lang_memory_region_type *p;
601 for (p = lang_memory_region_list;
602 p != (lang_memory_region_type *) NULL;
605 if (strcmp (p->name, name) == 0)
612 /* This code used to always use the first region in the list as the
613 default region. I changed it to instead use a region
614 encompassing all of memory as the default region. This permits
615 NOLOAD sections to work reasonably without requiring a region.
616 People should specify what region they mean, if they really want
618 if (strcmp (name, "*default*") == 0)
620 if (lang_memory_region_list != (lang_memory_region_type *) NULL)
622 return lang_memory_region_list;
628 lang_memory_region_type *new =
629 (lang_memory_region_type *) stat_alloc (sizeof (lang_memory_region_type));
631 new->name = xstrdup (name);
632 new->next = (lang_memory_region_type *) NULL;
634 *lang_memory_region_list_tail = new;
635 lang_memory_region_list_tail = &new->next;
639 new->length = ~(bfd_size_type) 0;
641 new->had_full_message = false;
647 static lang_memory_region_type *
648 lang_memory_default (section)
651 lang_memory_region_type *p;
653 flagword sec_flags = section->flags;
655 /* Override SEC_DATA to mean a writable section. */
656 if ((sec_flags & (SEC_ALLOC | SEC_READONLY | SEC_CODE)) == SEC_ALLOC)
657 sec_flags |= SEC_DATA;
659 for (p = lang_memory_region_list;
660 p != (lang_memory_region_type *) NULL;
663 if ((p->flags & sec_flags) != 0
664 && (p->not_flags & sec_flags) == 0)
669 return lang_memory_region_lookup ("*default*");
672 lang_output_section_statement_type *
673 lang_output_section_find (name)
674 const char *const name;
676 lang_statement_union_type *u;
677 lang_output_section_statement_type *lookup;
679 for (u = lang_output_section_statement.head;
680 u != (lang_statement_union_type *) NULL;
683 lookup = &u->output_section_statement;
684 if (strcmp (name, lookup->name) == 0)
689 return (lang_output_section_statement_type *) NULL;
692 lang_output_section_statement_type *
693 lang_output_section_statement_lookup (name)
694 const char *const name;
696 lang_output_section_statement_type *lookup;
698 lookup = lang_output_section_find (name);
699 if (lookup == (lang_output_section_statement_type *) NULL)
702 lookup = (lang_output_section_statement_type *)
703 new_stat (lang_output_section_statement, stat_ptr);
704 lookup->region = (lang_memory_region_type *) NULL;
705 lookup->lma_region = (lang_memory_region_type *) NULL;
707 lookup->block_value = 1;
710 lookup->next = (lang_statement_union_type *) NULL;
711 lookup->bfd_section = (asection *) NULL;
712 lookup->processed = false;
713 lookup->sectype = normal_section;
714 lookup->addr_tree = (etree_type *) NULL;
715 lang_list_init (&lookup->children);
717 lookup->memspec = (const char *) NULL;
719 lookup->subsection_alignment = -1;
720 lookup->section_alignment = -1;
721 lookup->load_base = (union etree_union *) NULL;
722 lookup->phdrs = NULL;
724 lang_statement_append (&lang_output_section_statement,
725 (lang_statement_union_type *) lookup,
732 lang_map_flags (flag)
735 if (flag & SEC_ALLOC)
741 if (flag & SEC_READONLY)
754 lang_memory_region_type *m;
756 minfo (_("\nMemory Configuration\n\n"));
757 fprintf (config.map_file, "%-16s %-18s %-18s %s\n",
758 _("Name"), _("Origin"), _("Length"), _("Attributes"));
760 for (m = lang_memory_region_list;
761 m != (lang_memory_region_type *) NULL;
767 fprintf (config.map_file, "%-16s ", m->name);
769 sprintf_vma (buf, m->origin);
770 minfo ("0x%s ", buf);
778 minfo ("0x%V", m->length);
779 if (m->flags || m->not_flags)
787 lang_map_flags (m->flags);
793 lang_map_flags (m->not_flags);
800 fprintf (config.map_file, _("\nLinker script and memory map\n\n"));
805 /* Initialize an output section. */
809 lang_output_section_statement_type *s;
811 section_userdata_type *new;
813 if (s->bfd_section != NULL)
816 if (strcmp (s->name, DISCARD_SECTION_NAME) == 0)
817 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME);
819 new = ((section_userdata_type *)
820 stat_alloc (sizeof (section_userdata_type)));
822 s->bfd_section = bfd_get_section_by_name (output_bfd, s->name);
823 if (s->bfd_section == (asection *) NULL)
824 s->bfd_section = bfd_make_section (output_bfd, s->name);
825 if (s->bfd_section == (asection *) NULL)
827 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
828 output_bfd->xvec->name, s->name);
830 s->bfd_section->output_section = s->bfd_section;
832 /* We initialize an output sections output offset to minus its own
833 vma to allow us to output a section through itself. */
834 s->bfd_section->output_offset = 0;
835 get_userdata (s->bfd_section) = (PTR) new;
837 /* If there is a base address, make sure that any sections it might
838 mention are initialized. */
839 if (s->addr_tree != NULL)
840 exp_init_os (s->addr_tree);
843 /* Make sure that all output sections mentioned in an expression are
850 switch (exp->type.node_class)
853 exp_init_os (exp->assign.src);
857 exp_init_os (exp->binary.lhs);
858 exp_init_os (exp->binary.rhs);
862 exp_init_os (exp->trinary.cond);
863 exp_init_os (exp->trinary.lhs);
864 exp_init_os (exp->trinary.rhs);
868 exp_init_os (exp->unary.child);
872 switch (exp->type.node_code)
878 lang_output_section_statement_type *os;
880 os = lang_output_section_find (exp->name.name);
881 if (os != NULL && os->bfd_section == NULL)
892 /* Sections marked with the SEC_LINK_ONCE flag should only be linked
893 once into the output. This routine checks each section, and
894 arrange to discard it if a section of the same name has already
895 been linked. If the section has COMDAT information, then it uses
896 that to decide whether the section should be included. This code
897 assumes that all relevant sections have the SEC_LINK_ONCE flag set;
898 that is, it does not depend solely upon the section name.
899 section_already_linked is called via bfd_map_over_sections. */
901 /* This is the shape of the elements inside the already_linked hash
902 table. It maps a name onto a list of already_linked elements with
903 the same name. It's possible to get more than one element in a
904 list if the COMDAT sections have different names. */
906 struct already_linked_hash_entry
908 struct bfd_hash_entry root;
909 struct already_linked *entry;
912 struct already_linked
914 struct already_linked *next;
918 /* The hash table. */
920 static struct bfd_hash_table already_linked_table;
923 section_already_linked (abfd, sec, data)
928 lang_input_statement_type *entry = (lang_input_statement_type *) data;
931 struct already_linked *l;
932 struct already_linked_hash_entry *already_linked_list;
934 /* If we are only reading symbols from this object, then we want to
935 discard all sections. */
936 if (entry->just_syms_flag)
938 sec->output_section = bfd_abs_section_ptr;
939 sec->output_offset = sec->vma;
943 flags = bfd_get_section_flags (abfd, sec);
945 if ((flags & SEC_LINK_ONCE) == 0)
948 /* FIXME: When doing a relocatable link, we may have trouble
949 copying relocations in other sections that refer to local symbols
950 in the section being discarded. Those relocations will have to
951 be converted somehow; as of this writing I'm not sure that any of
952 the backends handle that correctly.
954 It is tempting to instead not discard link once sections when
955 doing a relocatable link (technically, they should be discarded
956 whenever we are building constructors). However, that fails,
957 because the linker winds up combining all the link once sections
958 into a single large link once section, which defeats the purpose
959 of having link once sections in the first place.
961 Also, not merging link once sections in a relocatable link
962 causes trouble for MIPS ELF, which relies in link once semantics
963 to handle the .reginfo section correctly. */
965 name = bfd_get_section_name (abfd, sec);
967 already_linked_list =
968 ((struct already_linked_hash_entry *)
969 bfd_hash_lookup (&already_linked_table, name, true, false));
971 for (l = already_linked_list->entry; l != NULL; l = l->next)
973 if (sec->comdat == NULL
974 || l->sec->comdat == NULL
975 || strcmp (sec->comdat->name, l->sec->comdat->name) == 0)
977 /* The section has already been linked. See if we should
979 switch (flags & SEC_LINK_DUPLICATES)
984 case SEC_LINK_DUPLICATES_DISCARD:
987 case SEC_LINK_DUPLICATES_ONE_ONLY:
988 if (sec->comdat == NULL)
989 einfo (_("%P: %B: warning: ignoring duplicate section `%s'\n"),
992 einfo (_("%P: %B: warning: ignoring duplicate `%s' section symbol `%s'\n"),
993 abfd, name, sec->comdat->name);
996 case SEC_LINK_DUPLICATES_SAME_CONTENTS:
997 /* FIXME: We should really dig out the contents of both
998 sections and memcmp them. The COFF/PE spec says that
999 the Microsoft linker does not implement this
1000 correctly, so I'm not going to bother doing it
1003 case SEC_LINK_DUPLICATES_SAME_SIZE:
1004 if (bfd_section_size (abfd, sec)
1005 != bfd_section_size (l->sec->owner, l->sec))
1006 einfo (_("%P: %B: warning: duplicate section `%s' has different size\n"),
1011 /* Set the output_section field so that lang_add_section
1012 does not create a lang_input_section structure for this
1014 sec->output_section = bfd_abs_section_ptr;
1020 /* This is the first section with this name. Record it. Allocate
1021 the memory from the same obstack as the hash table is kept in. */
1023 l = ((struct already_linked *)
1024 bfd_hash_allocate (&already_linked_table, sizeof *l));
1027 l->next = already_linked_list->entry;
1028 already_linked_list->entry = l;
1031 /* Support routines for the hash table used by section_already_linked,
1032 initialize the table, fill in an entry and remove the table. */
1034 static struct bfd_hash_entry *
1035 already_linked_newfunc (entry, table, string)
1036 struct bfd_hash_entry *entry ATTRIBUTE_UNUSED;
1037 struct bfd_hash_table *table;
1038 const char *string ATTRIBUTE_UNUSED;
1040 struct already_linked_hash_entry *ret =
1041 bfd_hash_allocate (table, sizeof (struct already_linked_hash_entry));
1045 return (struct bfd_hash_entry *) ret;
1049 already_linked_table_init ()
1051 if (! bfd_hash_table_init_n (&already_linked_table,
1052 already_linked_newfunc,
1054 einfo (_("%P%F: Failed to create hash table\n"));
1058 already_linked_table_free ()
1060 bfd_hash_table_free (&already_linked_table);
1063 /* The wild routines.
1065 These expand statements like *(.text) and foo.o to a list of
1066 explicit actions, like foo.o(.text), bar.o(.text) and
1067 foo.o(.text, .data). */
1069 /* Return true if the PATTERN argument is a wildcard pattern.
1070 Although backslashes are treated specially if a pattern contains
1071 wildcards, we do not consider the mere presence of a backslash to
1072 be enough to cause the pattern to be treated as a wildcard.
1073 That lets us handle DOS filenames more naturally. */
1077 const char *pattern;
1081 for (s = pattern; *s != '\0'; ++s)
1089 /* Add SECTION to the output section OUTPUT. Do this by creating a
1090 lang_input_section statement which is placed at PTR. FILE is the
1091 input file which holds SECTION. */
1094 lang_add_section (ptr, section, output, file)
1095 lang_statement_list_type *ptr;
1097 lang_output_section_statement_type *output;
1098 lang_input_statement_type *file;
1103 flags = bfd_get_section_flags (section->owner, section);
1107 /* If we are doing a final link, discard sections marked with
1109 if (! link_info.relocateable
1110 && (flags & SEC_EXCLUDE) != 0)
1113 /* Discard input sections which are assigned to a section named
1114 DISCARD_SECTION_NAME. */
1115 if (strcmp (output->name, DISCARD_SECTION_NAME) == 0)
1118 /* Discard debugging sections if we are stripping debugging
1120 if ((link_info.strip == strip_debugger || link_info.strip == strip_all)
1121 && (flags & SEC_DEBUGGING) != 0)
1126 if (section->output_section == NULL)
1128 /* This prevents future calls from assigning this section. */
1129 section->output_section = bfd_abs_section_ptr;
1134 if (section->output_section == NULL)
1137 lang_input_section_type *new;
1140 if (output->bfd_section == NULL)
1143 first = ! output->bfd_section->linker_has_input;
1144 output->bfd_section->linker_has_input = 1;
1146 /* Add a section reference to the list. */
1147 new = new_stat (lang_input_section, ptr);
1149 new->section = section;
1151 section->output_section = output->bfd_section;
1153 flags = section->flags;
1155 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1156 to an output section, because we want to be able to include a
1157 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1158 section (I don't know why we want to do this, but we do).
1159 build_link_order in ldwrite.c handles this case by turning
1160 the embedded SEC_NEVER_LOAD section into a fill. */
1162 flags &= ~ SEC_NEVER_LOAD;
1164 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1165 already been processed. One reason to do this is that on pe
1166 format targets, .text$foo sections go into .text and it's odd
1167 to see .text with SEC_LINK_ONCE set. */
1169 if (! link_info.relocateable)
1170 flags &= ~ (SEC_LINK_ONCE | SEC_LINK_DUPLICATES);
1172 /* If this is not the first input section, and the SEC_READONLY
1173 flag is not currently set, then don't set it just because the
1174 input section has it set. */
1176 if (! first && (section->output_section->flags & SEC_READONLY) == 0)
1177 flags &= ~ SEC_READONLY;
1179 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1181 && ((section->output_section->flags & (SEC_MERGE | SEC_STRINGS))
1182 != (flags & (SEC_MERGE | SEC_STRINGS))
1183 || ((flags & SEC_MERGE)
1184 && section->output_section->entsize != section->entsize)))
1186 section->output_section->flags &= ~ (SEC_MERGE | SEC_STRINGS);
1187 flags &= ~ (SEC_MERGE | SEC_STRINGS);
1190 section->output_section->flags |= flags;
1192 if (flags & SEC_MERGE)
1193 section->output_section->entsize = section->entsize;
1195 /* If SEC_READONLY is not set in the input section, then clear
1196 it from the output section. */
1197 if ((section->flags & SEC_READONLY) == 0)
1198 section->output_section->flags &= ~SEC_READONLY;
1200 switch (output->sectype)
1202 case normal_section:
1207 case overlay_section:
1208 output->bfd_section->flags &= ~SEC_ALLOC;
1210 case noload_section:
1211 output->bfd_section->flags &= ~SEC_LOAD;
1212 output->bfd_section->flags |= SEC_NEVER_LOAD;
1216 /* Copy over SEC_SMALL_DATA. */
1217 if (section->flags & SEC_SMALL_DATA)
1218 section->output_section->flags |= SEC_SMALL_DATA;
1220 if (section->alignment_power > output->bfd_section->alignment_power)
1221 output->bfd_section->alignment_power = section->alignment_power;
1223 /* If supplied an aligment, then force it. */
1224 if (output->section_alignment != -1)
1225 output->bfd_section->alignment_power = output->section_alignment;
1227 if (section->flags & SEC_BLOCK)
1229 section->output_section->flags |= SEC_BLOCK;
1230 /* FIXME: This value should really be obtained from the bfd... */
1231 output->block_value = 128;
1236 /* Handle wildcard sorting. This returns the lang_input_section which
1237 should follow the one we are going to create for SECTION and FILE,
1238 based on the sorting requirements of WILD. It returns NULL if the
1239 new section should just go at the end of the current list. */
1241 static lang_statement_union_type *
1242 wild_sort (wild, sec, file, section)
1243 lang_wild_statement_type *wild;
1244 struct wildcard_list *sec;
1245 lang_input_statement_type *file;
1248 const char *section_name;
1249 lang_statement_union_type *l;
1251 if (!wild->filenames_sorted && (sec == NULL || !sec->spec.sorted))
1254 section_name = bfd_get_section_name (file->the_bfd, section);
1255 for (l = wild->children.head; l != NULL; l = l->header.next)
1257 lang_input_section_type *ls;
1259 if (l->header.type != lang_input_section_enum)
1261 ls = &l->input_section;
1263 /* Sorting by filename takes precedence over sorting by section
1266 if (wild->filenames_sorted)
1268 const char *fn, *ln;
1272 /* The PE support for the .idata section as generated by
1273 dlltool assumes that files will be sorted by the name of
1274 the archive and then the name of the file within the
1277 if (file->the_bfd != NULL
1278 && bfd_my_archive (file->the_bfd) != NULL)
1280 fn = bfd_get_filename (bfd_my_archive (file->the_bfd));
1285 fn = file->filename;
1289 if (ls->ifile->the_bfd != NULL
1290 && bfd_my_archive (ls->ifile->the_bfd) != NULL)
1292 ln = bfd_get_filename (bfd_my_archive (ls->ifile->the_bfd));
1297 ln = ls->ifile->filename;
1301 i = strcmp (fn, ln);
1310 fn = file->filename;
1312 ln = ls->ifile->filename;
1314 i = strcmp (fn, ln);
1322 /* Here either the files are not sorted by name, or we are
1323 looking at the sections for this file. */
1325 if (sec != NULL && sec->spec.sorted)
1327 if (strcmp (section_name,
1328 bfd_get_section_name (ls->ifile->the_bfd,
1338 /* Expand a wild statement for a particular FILE. SECTION may be
1339 NULL, in which case it is a wild card. */
1342 output_section_callback (ptr, sec, section, file, output)
1343 lang_wild_statement_type *ptr;
1344 struct wildcard_list *sec;
1346 lang_input_statement_type *file;
1349 lang_statement_union_type *before;
1351 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1352 if (unique_section_p (bfd_get_section_name (file->the_bfd, section)))
1355 /* If the wild pattern was marked KEEP, the member sections
1356 should be as well. */
1357 if (ptr->keep_sections)
1358 section->flags |= SEC_KEEP;
1360 before = wild_sort (ptr, sec, file, section);
1362 /* Here BEFORE points to the lang_input_section which
1363 should follow the one we are about to add. If BEFORE
1364 is NULL, then the section should just go at the end
1365 of the current list. */
1368 lang_add_section (&ptr->children, section,
1369 (lang_output_section_statement_type *) output,
1373 lang_statement_list_type list;
1374 lang_statement_union_type **pp;
1376 lang_list_init (&list);
1377 lang_add_section (&list, section,
1378 (lang_output_section_statement_type *) output,
1381 /* If we are discarding the section, LIST.HEAD will
1383 if (list.head != NULL)
1385 ASSERT (list.head->header.next == NULL);
1387 for (pp = &ptr->children.head;
1389 pp = &(*pp)->header.next)
1390 ASSERT (*pp != NULL);
1392 list.head->header.next = *pp;
1398 /* This is passed a file name which must have been seen already and
1399 added to the statement tree. We will see if it has been opened
1400 already and had its symbols read. If not then we'll read it. */
1402 static lang_input_statement_type *
1406 lang_input_statement_type *search;
1408 for (search = (lang_input_statement_type *) input_file_chain.head;
1409 search != (lang_input_statement_type *) NULL;
1410 search = (lang_input_statement_type *) search->next_real_file)
1412 if (search->filename == (char *) NULL && name == (char *) NULL)
1414 if (search->filename != (char *) NULL
1415 && name != (char *) NULL
1416 && strcmp (search->filename, name) == 0)
1420 if (search == (lang_input_statement_type *) NULL)
1421 search = new_afile (name, lang_input_file_is_file_enum, default_target,
1424 /* If we have already added this file, or this file is not real
1425 (FIXME: can that ever actually happen?) or the name is NULL
1426 (FIXME: can that ever actually happen?) don't add this file. */
1429 || search->filename == (const char *) NULL)
1432 if (! load_symbols (search, (lang_statement_list_type *) NULL))
1438 /* Get the symbols for an input file. */
1441 load_symbols (entry, place)
1442 lang_input_statement_type *entry;
1443 lang_statement_list_type *place;
1450 ldfile_open_file (entry);
1452 if (! bfd_check_format (entry->the_bfd, bfd_archive)
1453 && ! bfd_check_format_matches (entry->the_bfd, bfd_object, &matching))
1456 lang_statement_list_type *hold;
1457 boolean bad_load = true;
1459 err = bfd_get_error ();
1461 /* See if the emulation has some special knowledge. */
1462 if (ldemul_unrecognized_file (entry))
1465 if (err == bfd_error_file_ambiguously_recognized)
1469 einfo (_("%B: file not recognized: %E\n"), entry->the_bfd);
1470 einfo (_("%B: matching formats:"), entry->the_bfd);
1471 for (p = matching; *p != NULL; p++)
1475 else if (err != bfd_error_file_not_recognized
1477 einfo (_("%F%B: file not recognized: %E\n"), entry->the_bfd);
1481 bfd_close (entry->the_bfd);
1482 entry->the_bfd = NULL;
1484 /* Try to interpret the file as a linker script. */
1485 ldfile_open_command_file (entry->filename);
1490 ldfile_assumed_script = true;
1491 parser_input = input_script;
1493 ldfile_assumed_script = false;
1500 if (ldemul_recognized_file (entry))
1503 /* We don't call ldlang_add_file for an archive. Instead, the
1504 add_symbols entry point will call ldlang_add_file, via the
1505 add_archive_element callback, for each element of the archive
1507 switch (bfd_get_format (entry->the_bfd))
1513 ldlang_add_file (entry);
1514 if (trace_files || trace_file_tries)
1515 info_msg ("%I\n", entry);
1519 if (entry->whole_archive)
1521 bfd * member = NULL;
1522 boolean loaded = true;
1526 member = bfd_openr_next_archived_file (entry->the_bfd, member);
1531 if (! bfd_check_format (member, bfd_object))
1533 einfo (_("%F%B: member %B in archive is not an object\n"),
1534 entry->the_bfd, member);
1538 if (! ((*link_info.callbacks->add_archive_element)
1539 (&link_info, member, "--whole-archive")))
1542 if (! bfd_link_add_symbols (member, &link_info))
1544 einfo (_("%F%B: could not read symbols: %E\n"), member);
1549 entry->loaded = loaded;
1555 if (bfd_link_add_symbols (entry->the_bfd, &link_info))
1556 entry->loaded = true;
1558 einfo (_("%F%B: could not read symbols: %E\n"), entry->the_bfd);
1560 return entry->loaded;
1563 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
1564 may be NULL, indicating that it is a wildcard. Separate
1565 lang_input_section statements are created for each part of the
1566 expansion; they are added after the wild statement S. OUTPUT is
1567 the output section. */
1570 wild (s, target, output)
1571 lang_wild_statement_type *s;
1572 const char *target ATTRIBUTE_UNUSED;
1573 lang_output_section_statement_type *output;
1575 struct wildcard_list *sec;
1577 walk_wild (s, output_section_callback, (PTR) output);
1579 for (sec = s->section_list; sec != NULL; sec = sec->next)
1581 if (default_common_section != NULL)
1583 if (sec->spec.name != NULL && strcmp (sec->spec.name, "COMMON") == 0)
1585 /* Remember the section that common is going to in case we
1586 later get something which doesn't know where to put it. */
1587 default_common_section = output;
1592 /* Return true iff target is the sought target. */
1595 get_target (target, data)
1596 const bfd_target *target;
1599 const char *sought = (const char *) data;
1601 return strcmp (target->name, sought) == 0;
1604 /* Like strcpy() but convert to lower case as well. */
1613 while ((c = *src++) != 0)
1614 *dest++ = TOLOWER (c);
1619 /* Remove the first occurance of needle (if any) in haystack
1623 strcut (haystack, needle)
1627 haystack = strstr (haystack, needle);
1633 for (src = haystack + strlen (needle); *src;)
1634 *haystack++ = *src++;
1640 /* Compare two target format name strings.
1641 Return a value indicating how "similar" they are. */
1644 name_compare (first, second)
1652 copy1 = xmalloc (strlen (first) + 1);
1653 copy2 = xmalloc (strlen (second) + 1);
1655 /* Convert the names to lower case. */
1656 stricpy (copy1, first);
1657 stricpy (copy2, second);
1659 /* Remove and endian strings from the name. */
1660 strcut (copy1, "big");
1661 strcut (copy1, "little");
1662 strcut (copy2, "big");
1663 strcut (copy2, "little");
1665 /* Return a value based on how many characters match,
1666 starting from the beginning. If both strings are
1667 the same then return 10 * their length. */
1668 for (result = 0; copy1[result] == copy2[result]; result++)
1669 if (copy1[result] == 0)
1681 /* Set by closest_target_match() below. */
1682 static const bfd_target *winner;
1684 /* Scan all the valid bfd targets looking for one that has the endianness
1685 requirement that was specified on the command line, and is the nearest
1686 match to the original output target. */
1689 closest_target_match (target, data)
1690 const bfd_target *target;
1693 const bfd_target *original = (const bfd_target *) data;
1695 if (command_line.endian == ENDIAN_BIG
1696 && target->byteorder != BFD_ENDIAN_BIG)
1699 if (command_line.endian == ENDIAN_LITTLE
1700 && target->byteorder != BFD_ENDIAN_LITTLE)
1703 /* Must be the same flavour. */
1704 if (target->flavour != original->flavour)
1707 /* If we have not found a potential winner yet, then record this one. */
1714 /* Oh dear, we now have two potential candidates for a successful match.
1715 Compare their names and choose the better one. */
1716 if (name_compare (target->name, original->name)
1717 > name_compare (winner->name, original->name))
1720 /* Keep on searching until wqe have checked them all. */
1724 /* Return the BFD target format of the first input file. */
1727 get_first_input_target ()
1729 char *target = NULL;
1731 LANG_FOR_EACH_INPUT_STATEMENT (s)
1733 if (s->header.type == lang_input_statement_enum
1736 ldfile_open_file (s);
1738 if (s->the_bfd != NULL
1739 && bfd_check_format (s->the_bfd, bfd_object))
1741 target = bfd_get_target (s->the_bfd);
1752 /* Open the output file. */
1760 /* Has the user told us which output format to use? */
1761 if (output_target == (char *) NULL)
1763 /* No - has the current target been set to something other than
1765 if (current_target != default_target)
1766 output_target = current_target;
1768 /* No - can we determine the format of the first input file? */
1771 output_target = get_first_input_target ();
1773 /* Failed - use the default output target. */
1774 if (output_target == NULL)
1775 output_target = default_target;
1779 /* Has the user requested a particular endianness on the command
1781 if (command_line.endian != ENDIAN_UNSET)
1783 const bfd_target *target;
1784 enum bfd_endian desired_endian;
1786 /* Get the chosen target. */
1787 target = bfd_search_for_target (get_target, (PTR) output_target);
1789 /* If the target is not supported, we cannot do anything. */
1792 if (command_line.endian == ENDIAN_BIG)
1793 desired_endian = BFD_ENDIAN_BIG;
1795 desired_endian = BFD_ENDIAN_LITTLE;
1797 /* See if the target has the wrong endianness. This should
1798 not happen if the linker script has provided big and
1799 little endian alternatives, but some scrips don't do
1801 if (target->byteorder != desired_endian)
1803 /* If it does, then see if the target provides
1804 an alternative with the correct endianness. */
1805 if (target->alternative_target != NULL
1806 && (target->alternative_target->byteorder == desired_endian))
1807 output_target = target->alternative_target->name;
1810 /* Try to find a target as similar as possible to
1811 the default target, but which has the desired
1812 endian characteristic. */
1813 (void) bfd_search_for_target (closest_target_match,
1816 /* Oh dear - we could not find any targets that
1817 satisfy our requirements. */
1819 einfo (_("%P: warning: could not find any targets that match endianness requirement\n"));
1821 output_target = winner->name;
1827 output = bfd_openw (name, output_target);
1829 if (output == (bfd *) NULL)
1831 if (bfd_get_error () == bfd_error_invalid_target)
1832 einfo (_("%P%F: target %s not found\n"), output_target);
1834 einfo (_("%P%F: cannot open output file %s: %E\n"), name);
1837 delete_output_file_on_failure = true;
1840 output->flags |= D_PAGED;
1843 if (! bfd_set_format (output, bfd_object))
1844 einfo (_("%P%F:%s: can not make object file: %E\n"), name);
1845 if (! bfd_set_arch_mach (output,
1846 ldfile_output_architecture,
1847 ldfile_output_machine))
1848 einfo (_("%P%F:%s: can not set architecture: %E\n"), name);
1850 link_info.hash = bfd_link_hash_table_create (output);
1851 if (link_info.hash == (struct bfd_link_hash_table *) NULL)
1852 einfo (_("%P%F: can not create link hash table: %E\n"));
1854 bfd_set_gp_size (output, g_switch_value);
1859 ldlang_open_output (statement)
1860 lang_statement_union_type *statement;
1862 switch (statement->header.type)
1864 case lang_output_statement_enum:
1865 ASSERT (output_bfd == (bfd *) NULL);
1866 output_bfd = open_output (statement->output_statement.name);
1867 ldemul_set_output_arch ();
1868 if (config.magic_demand_paged && !link_info.relocateable)
1869 output_bfd->flags |= D_PAGED;
1871 output_bfd->flags &= ~D_PAGED;
1872 if (config.text_read_only)
1873 output_bfd->flags |= WP_TEXT;
1875 output_bfd->flags &= ~WP_TEXT;
1876 if (link_info.traditional_format)
1877 output_bfd->flags |= BFD_TRADITIONAL_FORMAT;
1879 output_bfd->flags &= ~BFD_TRADITIONAL_FORMAT;
1882 case lang_target_statement_enum:
1883 current_target = statement->target_statement.target;
1890 /* Open all the input files. */
1893 open_input_bfds (s, force)
1894 lang_statement_union_type *s;
1897 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
1899 switch (s->header.type)
1901 case lang_constructors_statement_enum:
1902 open_input_bfds (constructor_list.head, force);
1904 case lang_output_section_statement_enum:
1905 open_input_bfds (s->output_section_statement.children.head, force);
1907 case lang_wild_statement_enum:
1908 /* Maybe we should load the file's symbols. */
1909 if (s->wild_statement.filename
1910 && ! wildcardp (s->wild_statement.filename))
1911 (void) lookup_name (s->wild_statement.filename);
1912 open_input_bfds (s->wild_statement.children.head, force);
1914 case lang_group_statement_enum:
1916 struct bfd_link_hash_entry *undefs;
1918 /* We must continually search the entries in the group
1919 until no new symbols are added to the list of undefined
1924 undefs = link_info.hash->undefs_tail;
1925 open_input_bfds (s->group_statement.children.head, true);
1927 while (undefs != link_info.hash->undefs_tail);
1930 case lang_target_statement_enum:
1931 current_target = s->target_statement.target;
1933 case lang_input_statement_enum:
1934 if (s->input_statement.real)
1936 lang_statement_list_type add;
1938 s->input_statement.target = current_target;
1940 /* If we are being called from within a group, and this
1941 is an archive which has already been searched, then
1942 force it to be researched unless the whole archive
1943 has been loaded already. */
1945 && !s->input_statement.whole_archive
1946 && s->input_statement.loaded
1947 && bfd_check_format (s->input_statement.the_bfd,
1949 s->input_statement.loaded = false;
1951 lang_list_init (&add);
1953 if (! load_symbols (&s->input_statement, &add))
1954 config.make_executable = false;
1956 if (add.head != NULL)
1958 *add.tail = s->header.next;
1959 s->header.next = add.head;
1969 /* If there are [COMMONS] statements, put a wild one into the bss
1973 lang_reasonable_defaults ()
1976 lang_output_section_statement_lookup (".text");
1977 lang_output_section_statement_lookup (".data");
1979 default_common_section = lang_output_section_statement_lookup (".bss");
1981 if (placed_commons == false)
1983 lang_wild_statement_type *new =
1984 new_stat (lang_wild_statement,
1985 &default_common_section->children);
1987 new->section_name = "COMMON";
1988 new->filename = (char *) NULL;
1989 lang_list_init (&new->children);
1994 /* Add the supplied name to the symbol table as an undefined reference.
1995 Remove items from the chain as we open input bfds. */
1996 typedef struct ldlang_undef_chain_list
1998 struct ldlang_undef_chain_list *next;
2000 } ldlang_undef_chain_list_type;
2002 static ldlang_undef_chain_list_type *ldlang_undef_chain_list_head;
2005 ldlang_add_undef (name)
2006 const char *const name;
2008 ldlang_undef_chain_list_type *new =
2009 ((ldlang_undef_chain_list_type *)
2010 stat_alloc (sizeof (ldlang_undef_chain_list_type)));
2012 new->next = ldlang_undef_chain_list_head;
2013 ldlang_undef_chain_list_head = new;
2015 new->name = xstrdup (name);
2018 /* Run through the list of undefineds created above and place them
2019 into the linker hash table as undefined symbols belonging to the
2023 lang_place_undefineds ()
2025 ldlang_undef_chain_list_type *ptr;
2027 for (ptr = ldlang_undef_chain_list_head;
2028 ptr != (ldlang_undef_chain_list_type *) NULL;
2031 struct bfd_link_hash_entry *h;
2033 h = bfd_link_hash_lookup (link_info.hash, ptr->name, true, false, true);
2034 if (h == (struct bfd_link_hash_entry *) NULL)
2035 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2036 if (h->type == bfd_link_hash_new)
2038 h->type = bfd_link_hash_undefined;
2039 h->u.undef.abfd = NULL;
2040 bfd_link_add_undef (link_info.hash, h);
2045 /* Open input files and attatch to output sections. */
2048 map_input_to_output_sections (s, target, output_section_statement)
2049 lang_statement_union_type *s;
2051 lang_output_section_statement_type *output_section_statement;
2053 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
2055 switch (s->header.type)
2057 case lang_wild_statement_enum:
2058 wild (&s->wild_statement, target, output_section_statement);
2060 case lang_constructors_statement_enum:
2061 map_input_to_output_sections (constructor_list.head,
2063 output_section_statement);
2065 case lang_output_section_statement_enum:
2066 map_input_to_output_sections (s->output_section_statement.children.head,
2068 &s->output_section_statement);
2070 case lang_output_statement_enum:
2072 case lang_target_statement_enum:
2073 target = s->target_statement.target;
2075 case lang_group_statement_enum:
2076 map_input_to_output_sections (s->group_statement.children.head,
2078 output_section_statement);
2080 case lang_fill_statement_enum:
2081 case lang_input_section_enum:
2082 case lang_object_symbols_statement_enum:
2083 case lang_data_statement_enum:
2084 case lang_reloc_statement_enum:
2085 case lang_padding_statement_enum:
2086 case lang_input_statement_enum:
2087 if (output_section_statement != NULL
2088 && output_section_statement->bfd_section == NULL)
2089 init_os (output_section_statement);
2091 case lang_assignment_statement_enum:
2092 if (output_section_statement != NULL
2093 && output_section_statement->bfd_section == NULL)
2094 init_os (output_section_statement);
2096 /* Make sure that any sections mentioned in the assignment
2098 exp_init_os (s->assignment_statement.exp);
2100 case lang_afile_asection_pair_statement_enum:
2103 case lang_address_statement_enum:
2104 /* Mark the specified section with the supplied address. */
2106 lang_output_section_statement_type *os =
2107 lang_output_section_statement_lookup
2108 (s->address_statement.section_name);
2110 if (os->bfd_section == NULL)
2112 os->addr_tree = s->address_statement.address;
2120 print_output_section_statement (output_section_statement)
2121 lang_output_section_statement_type *output_section_statement;
2123 asection *section = output_section_statement->bfd_section;
2126 if (output_section_statement != abs_output_section)
2128 minfo ("\n%s", output_section_statement->name);
2130 if (section != NULL)
2132 print_dot = section->vma;
2134 len = strlen (output_section_statement->name);
2135 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2140 while (len < SECTION_NAME_MAP_LENGTH)
2146 minfo ("0x%V %W", section->vma, section->_raw_size);
2148 if (output_section_statement->load_base != NULL)
2152 addr = exp_get_abs_int (output_section_statement->load_base, 0,
2153 "load base", lang_final_phase_enum);
2154 minfo (_(" load address 0x%V"), addr);
2161 print_statement_list (output_section_statement->children.head,
2162 output_section_statement);
2166 print_assignment (assignment, output_section)
2167 lang_assignment_statement_type *assignment;
2168 lang_output_section_statement_type *output_section;
2171 etree_value_type result;
2173 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2176 result = exp_fold_tree (assignment->exp->assign.src, output_section,
2177 lang_final_phase_enum, print_dot, &print_dot);
2179 minfo ("0x%V", result.value + result.section->bfd_section->vma);
2190 exp_print_tree (assignment->exp);
2196 print_input_statement (statm)
2197 lang_input_statement_type *statm;
2199 if (statm->filename != (char *) NULL)
2201 fprintf (config.map_file, "LOAD %s\n", statm->filename);
2205 /* Print all symbols defined in a particular section. This is called
2206 via bfd_link_hash_traverse. */
2209 print_one_symbol (hash_entry, ptr)
2210 struct bfd_link_hash_entry *hash_entry;
2213 asection *sec = (asection *) ptr;
2215 if ((hash_entry->type == bfd_link_hash_defined
2216 || hash_entry->type == bfd_link_hash_defweak)
2217 && sec == hash_entry->u.def.section)
2221 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2224 (hash_entry->u.def.value
2225 + hash_entry->u.def.section->output_offset
2226 + hash_entry->u.def.section->output_section->vma));
2228 minfo (" %T\n", hash_entry->root.string);
2234 /* Print information about an input section to the map file. */
2237 print_input_section (in)
2238 lang_input_section_type *in;
2240 asection *i = in->section;
2241 bfd_size_type size = i->_cooked_size != 0 ? i->_cooked_size : i->_raw_size;
2242 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2243 ldfile_output_machine);
2248 minfo ("%s", i->name);
2250 if (i->output_section != NULL)
2254 len = 1 + strlen (i->name);
2255 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2260 while (len < SECTION_NAME_MAP_LENGTH)
2266 minfo ("0x%V %W %B\n",
2267 i->output_section->vma + i->output_offset, size / opb,
2270 if (i->_cooked_size != 0 && i->_cooked_size != i->_raw_size)
2272 len = SECTION_NAME_MAP_LENGTH + 3;
2284 minfo (_("%W (size before relaxing)\n"), i->_raw_size);
2287 bfd_link_hash_traverse (link_info.hash, print_one_symbol, (PTR) i);
2289 print_dot = i->output_section->vma + i->output_offset + size / opb;
2295 print_fill_statement (fill)
2296 lang_fill_statement_type *fill;
2298 fprintf (config.map_file, " FILL mask 0x%x\n", fill->fill);
2302 print_data_statement (data)
2303 lang_data_statement_type *data;
2309 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2310 ldfile_output_machine);
2312 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2315 addr = data->output_vma;
2316 if (data->output_section != NULL)
2317 addr += data->output_section->vma;
2345 minfo ("0x%V %W %s 0x%v", addr, size, name, data->value);
2347 if (data->exp->type.node_class != etree_value)
2350 exp_print_tree (data->exp);
2355 print_dot = addr + size / opb;
2359 /* Print an address statement. These are generated by options like
2363 print_address_statement (address)
2364 lang_address_statement_type *address;
2366 minfo (_("Address of section %s set to "), address->section_name);
2367 exp_print_tree (address->address);
2371 /* Print a reloc statement. */
2374 print_reloc_statement (reloc)
2375 lang_reloc_statement_type *reloc;
2380 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2381 ldfile_output_machine);
2383 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2386 addr = reloc->output_vma;
2387 if (reloc->output_section != NULL)
2388 addr += reloc->output_section->vma;
2390 size = bfd_get_reloc_size (reloc->howto);
2392 minfo ("0x%V %W RELOC %s ", addr, size, reloc->howto->name);
2394 if (reloc->name != NULL)
2395 minfo ("%s+", reloc->name);
2397 minfo ("%s+", reloc->section->name);
2399 exp_print_tree (reloc->addend_exp);
2403 print_dot = addr + size / opb;
2407 print_padding_statement (s)
2408 lang_padding_statement_type *s;
2412 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2413 ldfile_output_machine);
2417 len = sizeof " *fill*" - 1;
2418 while (len < SECTION_NAME_MAP_LENGTH)
2424 addr = s->output_offset;
2425 if (s->output_section != NULL)
2426 addr += s->output_section->vma;
2427 minfo ("0x%V %W", addr, s->size);
2430 minfo (" %u", s->fill);
2434 print_dot = addr + s->size / opb;
2438 print_wild_statement (w, os)
2439 lang_wild_statement_type *w;
2440 lang_output_section_statement_type *os;
2442 struct wildcard_list *sec;
2446 if (w->filenames_sorted)
2448 if (w->filename != NULL)
2449 minfo ("%s", w->filename);
2452 if (w->filenames_sorted)
2456 for (sec = w->section_list; sec; sec = sec->next)
2458 if (sec->spec.sorted)
2460 if (sec->spec.exclude_name_list != NULL)
2463 minfo ("EXCLUDE_FILE ( %s", sec->spec.exclude_name_list->name);
2464 for (tmp = sec->spec.exclude_name_list->next; tmp; tmp = tmp->next)
2465 minfo (", %s", tmp->name);
2468 if (sec->spec.name != NULL)
2469 minfo ("%s", sec->spec.name);
2472 if (sec->spec.sorted)
2479 print_statement_list (w->children.head, os);
2482 /* Print a group statement. */
2486 lang_group_statement_type *s;
2487 lang_output_section_statement_type *os;
2489 fprintf (config.map_file, "START GROUP\n");
2490 print_statement_list (s->children.head, os);
2491 fprintf (config.map_file, "END GROUP\n");
2494 /* Print the list of statements in S.
2495 This can be called for any statement type. */
2498 print_statement_list (s, os)
2499 lang_statement_union_type *s;
2500 lang_output_section_statement_type *os;
2504 print_statement (s, os);
2509 /* Print the first statement in statement list S.
2510 This can be called for any statement type. */
2513 print_statement (s, os)
2514 lang_statement_union_type *s;
2515 lang_output_section_statement_type *os;
2517 switch (s->header.type)
2520 fprintf (config.map_file, _("Fail with %d\n"), s->header.type);
2523 case lang_constructors_statement_enum:
2524 if (constructor_list.head != NULL)
2526 if (constructors_sorted)
2527 minfo (" SORT (CONSTRUCTORS)\n");
2529 minfo (" CONSTRUCTORS\n");
2530 print_statement_list (constructor_list.head, os);
2533 case lang_wild_statement_enum:
2534 print_wild_statement (&s->wild_statement, os);
2536 case lang_address_statement_enum:
2537 print_address_statement (&s->address_statement);
2539 case lang_object_symbols_statement_enum:
2540 minfo (" CREATE_OBJECT_SYMBOLS\n");
2542 case lang_fill_statement_enum:
2543 print_fill_statement (&s->fill_statement);
2545 case lang_data_statement_enum:
2546 print_data_statement (&s->data_statement);
2548 case lang_reloc_statement_enum:
2549 print_reloc_statement (&s->reloc_statement);
2551 case lang_input_section_enum:
2552 print_input_section (&s->input_section);
2554 case lang_padding_statement_enum:
2555 print_padding_statement (&s->padding_statement);
2557 case lang_output_section_statement_enum:
2558 print_output_section_statement (&s->output_section_statement);
2560 case lang_assignment_statement_enum:
2561 print_assignment (&s->assignment_statement, os);
2563 case lang_target_statement_enum:
2564 fprintf (config.map_file, "TARGET(%s)\n", s->target_statement.target);
2566 case lang_output_statement_enum:
2567 minfo ("OUTPUT(%s", s->output_statement.name);
2568 if (output_target != NULL)
2569 minfo (" %s", output_target);
2572 case lang_input_statement_enum:
2573 print_input_statement (&s->input_statement);
2575 case lang_group_statement_enum:
2576 print_group (&s->group_statement, os);
2578 case lang_afile_asection_pair_statement_enum:
2587 print_statement_list (statement_list.head, abs_output_section);
2590 /* Print the first N statements in statement list S to STDERR.
2591 If N == 0, nothing is printed.
2592 If N < 0, the entire list is printed.
2593 Intended to be called from GDB. */
2596 dprint_statement (s, n)
2597 lang_statement_union_type *s;
2600 FILE *map_save = config.map_file;
2602 config.map_file = stderr;
2605 print_statement_list (s, abs_output_section);
2608 while (s && --n >= 0)
2610 print_statement (s, abs_output_section);
2615 config.map_file = map_save;
2619 insert_pad (ptr, fill, alignment_needed, output_section, dot)
2620 lang_statement_union_type **ptr;
2622 unsigned int alignment_needed;
2623 asection *output_section;
2626 lang_statement_union_type *pad;
2628 pad = ((lang_statement_union_type *)
2629 ((char *) ptr - offsetof (lang_statement_union_type, header.next)));
2630 if (ptr != &statement_list.head
2631 && pad->header.type == lang_padding_statement_enum
2632 && pad->padding_statement.output_section == output_section)
2634 /* Use the existing pad statement. The above test on output
2635 section is probably redundant, but it doesn't hurt to check. */
2639 /* Make a new padding statement, linked into existing chain. */
2640 pad = ((lang_statement_union_type *)
2641 stat_alloc (sizeof (lang_padding_statement_type)));
2642 pad->header.next = *ptr;
2644 pad->header.type = lang_padding_statement_enum;
2645 pad->padding_statement.output_section = output_section;
2646 pad->padding_statement.fill = fill;
2648 pad->padding_statement.output_offset = dot - output_section->vma;
2649 pad->padding_statement.size = alignment_needed;
2650 output_section->_raw_size += alignment_needed;
2653 /* Work out how much this section will move the dot point. */
2656 size_input_section (this_ptr, output_section_statement, fill, dot)
2657 lang_statement_union_type **this_ptr;
2658 lang_output_section_statement_type *output_section_statement;
2662 lang_input_section_type *is = &((*this_ptr)->input_section);
2663 asection *i = is->section;
2665 if (is->ifile->just_syms_flag == false)
2667 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2668 ldfile_output_machine);
2669 unsigned int alignment_needed;
2672 /* Align this section first to the input sections requirement,
2673 then to the output section's requirement. If this alignment
2674 is greater than any seen before, then record it too. Perform
2675 the alignment by inserting a magic 'padding' statement. */
2677 if (output_section_statement->subsection_alignment != -1)
2678 i->alignment_power = output_section_statement->subsection_alignment;
2680 o = output_section_statement->bfd_section;
2681 if (o->alignment_power < i->alignment_power)
2682 o->alignment_power = i->alignment_power;
2684 alignment_needed = align_power (dot, i->alignment_power) - dot;
2686 if (alignment_needed != 0)
2688 insert_pad (this_ptr, fill, alignment_needed * opb, o, dot);
2689 dot += alignment_needed;
2692 /* Remember where in the output section this input section goes. */
2694 i->output_offset = dot - o->vma;
2696 /* Mark how big the output section must be to contain this now. */
2697 if (i->_cooked_size != 0)
2698 dot += i->_cooked_size / opb;
2700 dot += i->_raw_size / opb;
2701 o->_raw_size = (dot - o->vma) * opb;
2705 i->output_offset = i->vma - output_section_statement->bfd_section->vma;
2711 #define IGNORE_SECTION(bfd, s) \
2712 (((bfd_get_section_flags (bfd, s) & (SEC_ALLOC | SEC_LOAD)) \
2713 != (SEC_ALLOC | SEC_LOAD)) \
2714 || bfd_section_size (bfd, s) == 0)
2716 /* Check to see if any allocated sections overlap with other allocated
2717 sections. This can happen when the linker script specifically specifies
2718 the output section addresses of the two sections. */
2721 lang_check_section_addresses ()
2724 unsigned opb = bfd_octets_per_byte (output_bfd);
2726 /* Scan all sections in the output list. */
2727 for (s = output_bfd->sections; s != NULL; s = s->next)
2731 /* Ignore sections which are not loaded or which have no contents. */
2732 if (IGNORE_SECTION (output_bfd, s))
2735 /* Once we reach section 's' stop our seach. This prevents two
2736 warning messages from being produced, one for 'section A overlaps
2737 section B' and one for 'section B overlaps section A'. */
2738 for (os = output_bfd->sections; os != s; os = os->next)
2745 /* Only consider loadable sections with real contents. */
2746 if (IGNORE_SECTION (output_bfd, os))
2749 /* We must check the sections' LMA addresses not their
2750 VMA addresses because overlay sections can have
2751 overlapping VMAs but they must have distinct LMAs. */
2752 s_start = bfd_section_lma (output_bfd, s);
2753 os_start = bfd_section_lma (output_bfd, os);
2754 s_end = s_start + bfd_section_size (output_bfd, s) / opb - 1;
2755 os_end = os_start + bfd_section_size (output_bfd, os) / opb - 1;
2757 /* Look for an overlap. */
2758 if ((s_end < os_start) || (s_start > os_end))
2762 _("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
2763 s->name, s_start, s_end, os->name, os_start, os_end);
2765 /* Once we have found one overlap for this section,
2766 stop looking for others. */
2772 /* Make sure the new address is within the region. We explicitly permit the
2773 current address to be at the exact end of the region when the address is
2774 non-zero, in case the region is at the end of addressable memory and the
2775 calculation wraps around. */
2778 os_region_check (os, region, tree, base)
2779 lang_output_section_statement_type *os;
2780 struct memory_region_struct *region;
2784 if ((region->current < region->origin
2785 || (region->current - region->origin > region->length))
2786 && ((region->current != region->origin + region->length)
2789 if (tree != (etree_type *) NULL)
2791 einfo (_("%X%P: address 0x%v of %B section %s is not within region %s\n"),
2793 os->bfd_section->owner,
2794 os->bfd_section->name,
2799 einfo (_("%X%P: region %s is full (%B section %s)\n"),
2801 os->bfd_section->owner,
2802 os->bfd_section->name);
2804 /* Reset the region pointer. */
2805 region->current = region->origin;
2809 /* Set the sizes for all the output sections. */
2812 lang_size_sections (s, output_section_statement, prev, fill, dot, relax)
2813 lang_statement_union_type *s;
2814 lang_output_section_statement_type *output_section_statement;
2815 lang_statement_union_type **prev;
2820 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
2821 ldfile_output_machine);
2823 /* Size up the sections from their constituent parts. */
2824 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
2826 switch (s->header.type)
2828 case lang_output_section_statement_enum:
2831 lang_output_section_statement_type *os;
2833 os = &s->output_section_statement;
2834 if (os->bfd_section == NULL)
2835 /* This section was never actually created. */
2838 /* If this is a COFF shared library section, use the size and
2839 address from the input section. FIXME: This is COFF
2840 specific; it would be cleaner if there were some other way
2841 to do this, but nothing simple comes to mind. */
2842 if ((os->bfd_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
2846 if (os->children.head == NULL
2847 || os->children.head->header.next != NULL
2848 || os->children.head->header.type != lang_input_section_enum)
2849 einfo (_("%P%X: Internal error on COFF shared library section %s\n"),
2852 input = os->children.head->input_section.section;
2853 bfd_set_section_vma (os->bfd_section->owner,
2855 bfd_section_vma (input->owner, input));
2856 os->bfd_section->_raw_size = input->_raw_size;
2860 if (bfd_is_abs_section (os->bfd_section))
2862 /* No matter what happens, an abs section starts at zero. */
2863 ASSERT (os->bfd_section->vma == 0);
2867 if (os->addr_tree == (etree_type *) NULL)
2869 /* No address specified for this section, get one
2870 from the region specification. */
2871 if (os->region == (lang_memory_region_type *) NULL
2872 || (((bfd_get_section_flags (output_bfd, os->bfd_section)
2873 & (SEC_ALLOC | SEC_LOAD)) != 0)
2874 && os->region->name[0] == '*'
2875 && strcmp (os->region->name, "*default*") == 0))
2877 os->region = lang_memory_default (os->bfd_section);
2880 /* If a loadable section is using the default memory
2881 region, and some non default memory regions were
2882 defined, issue a warning. */
2883 if ((bfd_get_section_flags (output_bfd, os->bfd_section)
2884 & (SEC_ALLOC | SEC_LOAD)) != 0
2885 && ! link_info.relocateable
2886 && strcmp (os->region->name, "*default*") == 0
2887 && lang_memory_region_list != NULL
2888 && (strcmp (lang_memory_region_list->name,
2890 || lang_memory_region_list->next != NULL))
2891 einfo (_("%P: warning: no memory region specified for section `%s'\n"),
2892 bfd_get_section_name (output_bfd,
2895 dot = os->region->current;
2897 if (os->section_alignment == -1)
2902 dot = align_power (dot,
2903 os->bfd_section->alignment_power);
2905 if (dot != olddot && config.warn_section_align)
2906 einfo (_("%P: warning: changing start of section %s by %u bytes\n"),
2907 os->name, (unsigned int) (dot - olddot));
2914 r = exp_fold_tree (os->addr_tree,
2916 lang_allocating_phase_enum,
2918 if (r.valid_p == false)
2920 einfo (_("%F%S: non constant address expression for section %s\n"),
2923 dot = r.value + r.section->bfd_section->vma;
2926 /* The section starts here.
2927 First, align to what the section needs. */
2929 if (os->section_alignment != -1)
2930 dot = align_power (dot, os->section_alignment);
2932 bfd_set_section_vma (0, os->bfd_section, dot);
2934 os->bfd_section->output_offset = 0;
2937 lang_size_sections (os->children.head, os, &os->children.head,
2938 os->fill, dot, relax);
2940 /* Put the section within the requested block size, or
2941 align at the block boundary. */
2942 after = ALIGN_N (os->bfd_section->vma
2943 + os->bfd_section->_raw_size / opb,
2944 /* The coercion here is important, see ld.h. */
2945 (bfd_vma) os->block_value);
2947 if (bfd_is_abs_section (os->bfd_section))
2948 ASSERT (after == os->bfd_section->vma);
2950 os->bfd_section->_raw_size =
2951 (after - os->bfd_section->vma) * opb;
2952 dot = os->bfd_section->vma + os->bfd_section->_raw_size / opb;
2953 os->processed = true;
2955 /* Update dot in the region ?
2956 We only do this if the section is going to be allocated,
2957 since unallocated sections do not contribute to the region's
2958 overall size in memory.
2960 If the SEC_NEVER_LOAD bit is not set, it will affect the
2961 addresses of sections after it. We have to update
2963 if (os->region != (lang_memory_region_type *) NULL
2964 && ((bfd_get_section_flags (output_bfd, os->bfd_section)
2965 & SEC_NEVER_LOAD) == 0
2966 || (bfd_get_section_flags (output_bfd, os->bfd_section)
2967 & (SEC_ALLOC | SEC_LOAD))))
2969 os->region->current = dot;
2971 /* Make sure the new address is within the region. */
2972 os_region_check (os, os->region, os->addr_tree,
2973 os->bfd_section->vma);
2975 /* If there's no load address specified, use the run
2976 region as the load region. */
2977 if (os->lma_region == NULL && os->load_base == NULL)
2978 os->lma_region = os->region;
2980 if (os->lma_region != NULL)
2982 if (os->load_base != NULL)
2984 einfo (_("%X%P: use an absolute load address or a load memory region, not both\n"));
2988 /* Don't allocate twice. */
2989 if (os->lma_region != os->region)
2991 /* Set load_base, which will be handled later. */
2993 exp_intop (os->lma_region->current);
2994 os->lma_region->current +=
2995 os->bfd_section->_raw_size / opb;
2996 os_region_check (os, os->lma_region, NULL,
2997 os->bfd_section->lma);
3005 case lang_constructors_statement_enum:
3006 dot = lang_size_sections (constructor_list.head,
3007 output_section_statement,
3008 &s->wild_statement.children.head,
3012 case lang_data_statement_enum:
3014 unsigned int size = 0;
3016 s->data_statement.output_vma =
3017 dot - output_section_statement->bfd_section->vma;
3018 s->data_statement.output_section =
3019 output_section_statement->bfd_section;
3021 switch (s->data_statement.type)
3042 output_section_statement->bfd_section->_raw_size += size;
3043 /* The output section gets contents, and then we inspect for
3044 any flags set in the input script which override any ALLOC. */
3045 output_section_statement->bfd_section->flags |= SEC_HAS_CONTENTS;
3046 if (!(output_section_statement->flags & SEC_NEVER_LOAD))
3048 output_section_statement->bfd_section->flags |=
3049 SEC_ALLOC | SEC_LOAD;
3054 case lang_reloc_statement_enum:
3058 s->reloc_statement.output_vma =
3059 dot - output_section_statement->bfd_section->vma;
3060 s->reloc_statement.output_section =
3061 output_section_statement->bfd_section;
3062 size = bfd_get_reloc_size (s->reloc_statement.howto);
3064 output_section_statement->bfd_section->_raw_size += size;
3068 case lang_wild_statement_enum:
3070 dot = lang_size_sections (s->wild_statement.children.head,
3071 output_section_statement,
3072 &s->wild_statement.children.head,
3077 case lang_object_symbols_statement_enum:
3078 link_info.create_object_symbols_section =
3079 output_section_statement->bfd_section;
3081 case lang_output_statement_enum:
3082 case lang_target_statement_enum:
3084 case lang_input_section_enum:
3088 i = (*prev)->input_section.section;
3091 if (i->_cooked_size == 0)
3092 i->_cooked_size = i->_raw_size;
3098 if (! bfd_relax_section (i->owner, i, &link_info, &again))
3099 einfo (_("%P%F: can't relax section: %E\n"));
3103 dot = size_input_section (prev, output_section_statement,
3104 output_section_statement->fill, dot);
3107 case lang_input_statement_enum:
3109 case lang_fill_statement_enum:
3110 s->fill_statement.output_section =
3111 output_section_statement->bfd_section;
3113 fill = s->fill_statement.fill;
3115 case lang_assignment_statement_enum:
3117 bfd_vma newdot = dot;
3119 exp_fold_tree (s->assignment_statement.exp,
3120 output_section_statement,
3121 lang_allocating_phase_enum,
3127 if (output_section_statement == abs_output_section)
3129 /* If we don't have an output section, then just adjust
3130 the default memory address. */
3131 lang_memory_region_lookup ("*default*")->current = newdot;
3135 /* Insert a pad after this statement. We can't
3136 put the pad before when relaxing, in case the
3137 assignment references dot. */
3138 insert_pad (&s->header.next, fill, (newdot - dot) * opb,
3139 output_section_statement->bfd_section, dot);
3141 /* Don't neuter the pad below when relaxing. */
3150 case lang_padding_statement_enum:
3151 /* If this is the first time lang_size_sections is called,
3152 we won't have any padding statements. If this is the
3153 second or later passes when relaxing, we should allow
3154 padding to shrink. If padding is needed on this pass, it
3155 will be added back in. */
3156 s->padding_statement.size = 0;
3158 /* Make sure output_offset is valid. If relaxation shrinks
3159 the section and this pad isn't needed, it's possible to
3160 have output_offset larger than the final size of the
3161 section. bfd_set_section_contents will complain even for
3162 a pad size of zero. */
3163 s->padding_statement.output_offset
3164 = dot - output_section_statement->bfd_section->vma;
3167 case lang_group_statement_enum:
3168 dot = lang_size_sections (s->group_statement.children.head,
3169 output_section_statement,
3170 &s->group_statement.children.head,
3178 /* We can only get here when relaxing is turned on. */
3179 case lang_address_statement_enum:
3182 prev = &s->header.next;
3188 lang_do_assignments (s, output_section_statement, fill, dot)
3189 lang_statement_union_type *s;
3190 lang_output_section_statement_type *output_section_statement;
3194 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
3195 ldfile_output_machine);
3197 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
3199 switch (s->header.type)
3201 case lang_constructors_statement_enum:
3202 dot = lang_do_assignments (constructor_list.head,
3203 output_section_statement,
3208 case lang_output_section_statement_enum:
3210 lang_output_section_statement_type *os;
3212 os = &(s->output_section_statement);
3213 if (os->bfd_section != NULL)
3215 dot = os->bfd_section->vma;
3216 (void) lang_do_assignments (os->children.head, os,
3218 dot = os->bfd_section->vma + os->bfd_section->_raw_size / opb;
3223 /* If nothing has been placed into the output section then
3224 it won't have a bfd_section. */
3225 if (os->bfd_section)
3227 os->bfd_section->lma
3228 = exp_get_abs_int (os->load_base, 0, "load base",
3229 lang_final_phase_enum);
3234 case lang_wild_statement_enum:
3236 dot = lang_do_assignments (s->wild_statement.children.head,
3237 output_section_statement,
3242 case lang_object_symbols_statement_enum:
3243 case lang_output_statement_enum:
3244 case lang_target_statement_enum:
3246 case lang_common_statement_enum:
3249 case lang_data_statement_enum:
3251 etree_value_type value;
3253 value = exp_fold_tree (s->data_statement.exp,
3255 lang_final_phase_enum, dot, &dot);
3256 s->data_statement.value = value.value;
3257 if (value.valid_p == false)
3258 einfo (_("%F%P: invalid data statement\n"));
3262 switch (s->data_statement.type)
3286 case lang_reloc_statement_enum:
3288 etree_value_type value;
3290 value = exp_fold_tree (s->reloc_statement.addend_exp,
3292 lang_final_phase_enum, dot, &dot);
3293 s->reloc_statement.addend_value = value.value;
3294 if (value.valid_p == false)
3295 einfo (_("%F%P: invalid reloc statement\n"));
3297 dot += bfd_get_reloc_size (s->reloc_statement.howto) / opb;
3300 case lang_input_section_enum:
3302 asection *in = s->input_section.section;
3304 if (in->_cooked_size != 0)
3305 dot += in->_cooked_size / opb;
3307 dot += in->_raw_size / opb;
3311 case lang_input_statement_enum:
3313 case lang_fill_statement_enum:
3314 fill = s->fill_statement.fill;
3316 case lang_assignment_statement_enum:
3318 exp_fold_tree (s->assignment_statement.exp,
3319 output_section_statement,
3320 lang_final_phase_enum,
3326 case lang_padding_statement_enum:
3327 dot += s->padding_statement.size / opb;
3330 case lang_group_statement_enum:
3331 dot = lang_do_assignments (s->group_statement.children.head,
3332 output_section_statement,
3340 case lang_address_statement_enum:
3348 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
3349 operator .startof. (section_name), it produces an undefined symbol
3350 .startof.section_name. Similarly, when it sees
3351 .sizeof. (section_name), it produces an undefined symbol
3352 .sizeof.section_name. For all the output sections, we look for
3353 such symbols, and set them to the correct value. */
3360 if (link_info.relocateable)
3363 for (s = output_bfd->sections; s != NULL; s = s->next)
3365 const char *secname;
3367 struct bfd_link_hash_entry *h;
3369 secname = bfd_get_section_name (output_bfd, s);
3370 buf = xmalloc (10 + strlen (secname));
3372 sprintf (buf, ".startof.%s", secname);
3373 h = bfd_link_hash_lookup (link_info.hash, buf, false, false, true);
3374 if (h != NULL && h->type == bfd_link_hash_undefined)
3376 h->type = bfd_link_hash_defined;
3377 h->u.def.value = bfd_get_section_vma (output_bfd, s);
3378 h->u.def.section = bfd_abs_section_ptr;
3381 sprintf (buf, ".sizeof.%s", secname);
3382 h = bfd_link_hash_lookup (link_info.hash, buf, false, false, true);
3383 if (h != NULL && h->type == bfd_link_hash_undefined)
3387 opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
3388 ldfile_output_machine);
3389 h->type = bfd_link_hash_defined;
3390 if (s->_cooked_size != 0)
3391 h->u.def.value = s->_cooked_size / opb;
3393 h->u.def.value = s->_raw_size / opb;
3394 h->u.def.section = bfd_abs_section_ptr;
3404 struct bfd_link_hash_entry *h;
3407 if (link_info.relocateable || link_info.shared)
3412 if (entry_symbol == (char *) NULL)
3414 /* No entry has been specified. Look for start, but don't warn
3415 if we don't find it. */
3416 entry_symbol = "start";
3420 h = bfd_link_hash_lookup (link_info.hash, entry_symbol, false, false, true);
3421 if (h != (struct bfd_link_hash_entry *) NULL
3422 && (h->type == bfd_link_hash_defined
3423 || h->type == bfd_link_hash_defweak)
3424 && h->u.def.section->output_section != NULL)
3428 val = (h->u.def.value
3429 + bfd_get_section_vma (output_bfd,
3430 h->u.def.section->output_section)
3431 + h->u.def.section->output_offset);
3432 if (! bfd_set_start_address (output_bfd, val))
3433 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol);
3440 /* We couldn't find the entry symbol. Try parsing it as a
3442 val = bfd_scan_vma (entry_symbol, &send, 0);
3445 if (! bfd_set_start_address (output_bfd, val))
3446 einfo (_("%P%F: can't set start address\n"));
3452 /* Can't find the entry symbol, and it's not a number. Use
3453 the first address in the text section. */
3454 ts = bfd_get_section_by_name (output_bfd, ".text");
3455 if (ts != (asection *) NULL)
3458 einfo (_("%P: warning: cannot find entry symbol %s; defaulting to %V\n"),
3459 entry_symbol, bfd_get_section_vma (output_bfd, ts));
3460 if (! bfd_set_start_address (output_bfd,
3461 bfd_get_section_vma (output_bfd,
3463 einfo (_("%P%F: can't set start address\n"));
3468 einfo (_("%P: warning: cannot find entry symbol %s; not setting start address\n"),
3475 /* This is a small function used when we want to ignore errors from
3479 #ifdef ANSI_PROTOTYPES
3480 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED, ...)
3482 ignore_bfd_errors (s)
3483 const char *s ATTRIBUTE_UNUSED;
3486 /* Don't do anything. */
3489 /* Check that the architecture of all the input files is compatible
3490 with the output file. Also call the backend to let it do any
3491 other checking that is needed. */
3496 lang_statement_union_type *file;
3498 const bfd_arch_info_type *compatible;
3500 for (file = file_chain.head;
3501 file != (lang_statement_union_type *) NULL;
3502 file = file->input_statement.next)
3504 input_bfd = file->input_statement.the_bfd;
3505 compatible = bfd_arch_get_compatible (input_bfd,
3507 if (compatible == NULL)
3509 if (command_line.warn_mismatch)
3510 einfo (_("%P: warning: %s architecture of input file `%B' is incompatible with %s output\n"),
3511 bfd_printable_name (input_bfd), input_bfd,
3512 bfd_printable_name (output_bfd));
3514 else if (link_info.relocateable
3515 /* In general it is not possible to perform a relocatable
3516 link between differing object formats when the input
3517 file has relocations, because the relocations in the
3518 input format may not have equivalent representations in
3519 the output format (and besides BFD does not translate
3520 relocs for other link purposes than a final link). */
3521 && bfd_get_flavour (input_bfd) != bfd_get_flavour (output_bfd)
3522 && (bfd_get_file_flags (input_bfd) & HAS_RELOC) != 0)
3523 einfo (_("%P%F: Relocatable linking with relocations from format %s (%B) to format %s (%B) is not supported\n"),
3524 bfd_get_target (input_bfd), input_bfd,
3525 bfd_get_target (output_bfd), output_bfd);
3526 else if (bfd_count_sections (input_bfd))
3528 /* If the input bfd has no contents, it shouldn't set the
3529 private data of the output bfd. */
3531 bfd_error_handler_type pfn = NULL;
3533 /* If we aren't supposed to warn about mismatched input
3534 files, temporarily set the BFD error handler to a
3535 function which will do nothing. We still want to call
3536 bfd_merge_private_bfd_data, since it may set up
3537 information which is needed in the output file. */
3538 if (! command_line.warn_mismatch)
3539 pfn = bfd_set_error_handler (ignore_bfd_errors);
3540 if (! bfd_merge_private_bfd_data (input_bfd, output_bfd))
3542 if (command_line.warn_mismatch)
3543 einfo (_("%E%X: failed to merge target specific data of file %B\n"),
3546 if (! command_line.warn_mismatch)
3547 bfd_set_error_handler (pfn);
3552 /* Look through all the global common symbols and attach them to the
3553 correct section. The -sort-common command line switch may be used
3554 to roughly sort the entries by size. */
3559 if (command_line.inhibit_common_definition)
3561 if (link_info.relocateable
3562 && ! command_line.force_common_definition)
3565 if (! config.sort_common)
3566 bfd_link_hash_traverse (link_info.hash, lang_one_common, (PTR) NULL);
3571 for (power = 4; power >= 0; power--)
3572 bfd_link_hash_traverse (link_info.hash, lang_one_common,
3577 /* Place one common symbol in the correct section. */
3580 lang_one_common (h, info)
3581 struct bfd_link_hash_entry *h;
3584 unsigned int power_of_two;
3587 unsigned opb = bfd_arch_mach_octets_per_byte (ldfile_output_architecture,
3588 ldfile_output_machine);
3590 if (h->type != bfd_link_hash_common)
3594 power_of_two = h->u.c.p->alignment_power;
3596 if (config.sort_common
3597 && power_of_two < (unsigned int) *(int *) info)
3600 section = h->u.c.p->section;
3602 /* Increase the size of the section. */
3603 section->_cooked_size = ALIGN_N ((section->_cooked_size + opb - 1) / opb,
3604 (bfd_size_type) (1 << power_of_two)) * opb;
3606 /* Adjust the alignment if necessary. */
3607 if (power_of_two > section->alignment_power)
3608 section->alignment_power = power_of_two;
3610 /* Change the symbol from common to defined. */
3611 h->type = bfd_link_hash_defined;
3612 h->u.def.section = section;
3613 h->u.def.value = section->_cooked_size;
3615 /* Increase the size of the section. */
3616 section->_cooked_size += size;
3618 /* Make sure the section is allocated in memory, and make sure that
3619 it is no longer a common section. */
3620 section->flags |= SEC_ALLOC;
3621 section->flags &= ~SEC_IS_COMMON;
3623 if (config.map_file != NULL)
3625 static boolean header_printed;
3630 if (! header_printed)
3632 minfo (_("\nAllocating common symbols\n"));
3633 minfo (_("Common symbol size file\n\n"));
3634 header_printed = true;
3637 name = demangle (h->root.string);
3639 len = strlen (name);
3654 if (size <= 0xffffffff)
3655 sprintf (buf, "%lx", (unsigned long) size);
3657 sprintf_vma (buf, size);
3667 minfo ("%B\n", section->owner);
3673 /* Run through the input files and ensure that every input section has
3674 somewhere to go. If one is found without a destination then create
3675 an input request and place it into the statement tree. */
3678 lang_place_orphans ()
3680 LANG_FOR_EACH_INPUT_STATEMENT (file)
3684 for (s = file->the_bfd->sections;
3685 s != (asection *) NULL;
3688 if (s->output_section == (asection *) NULL)
3690 /* This section of the file is not attatched, root
3691 around for a sensible place for it to go. */
3693 if (file->just_syms_flag)
3695 /* We are only retrieving symbol values from this
3696 file. We want the symbols to act as though the
3697 values in the file are absolute. */
3698 s->output_section = bfd_abs_section_ptr;
3699 s->output_offset = s->vma;
3701 else if (strcmp (s->name, "COMMON") == 0)
3703 /* This is a lonely common section which must have
3704 come from an archive. We attach to the section
3705 with the wildcard. */
3706 if (! link_info.relocateable
3707 || command_line.force_common_definition)
3709 if (default_common_section == NULL)
3712 /* This message happens when using the
3713 svr3.ifile linker script, so I have
3715 info_msg (_("%P: no [COMMON] command, defaulting to .bss\n"));
3717 default_common_section =
3718 lang_output_section_statement_lookup (".bss");
3721 lang_add_section (&default_common_section->children, s,
3722 default_common_section, file);
3725 else if (ldemul_place_orphan (file, s))
3729 lang_output_section_statement_type *os;
3731 os = lang_output_section_statement_lookup (s->name);
3732 lang_add_section (&os->children, s, os, file);
3740 lang_set_flags (ptr, flags, invert)
3741 lang_memory_region_type *ptr;
3745 flagword *ptr_flags;
3747 ptr_flags = invert ? &ptr->not_flags : &ptr->flags;
3753 *ptr_flags |= SEC_ALLOC;
3757 *ptr_flags |= SEC_READONLY;
3761 *ptr_flags |= SEC_DATA;
3765 *ptr_flags |= SEC_CODE;
3770 *ptr_flags |= SEC_LOAD;
3774 einfo (_("%P%F: invalid syntax in flags\n"));
3781 /* Call a function on each input file. This function will be called
3782 on an archive, but not on the elements. */
3785 lang_for_each_input_file (func)
3786 void (*func) PARAMS ((lang_input_statement_type *));
3788 lang_input_statement_type *f;
3790 for (f = (lang_input_statement_type *) input_file_chain.head;
3792 f = (lang_input_statement_type *) f->next_real_file)
3796 /* Call a function on each file. The function will be called on all
3797 the elements of an archive which are included in the link, but will
3798 not be called on the archive file itself. */
3801 lang_for_each_file (func)
3802 void (*func) PARAMS ((lang_input_statement_type *));
3804 LANG_FOR_EACH_INPUT_STATEMENT (f)
3815 lang_for_each_input_section (func)
3816 void (*func) PARAMS ((bfd *ab, asection *as));
3818 LANG_FOR_EACH_INPUT_STATEMENT (f)
3822 for (s = f->the_bfd->sections;
3823 s != (asection *) NULL;
3826 func (f->the_bfd, s);
3834 ldlang_add_file (entry)
3835 lang_input_statement_type *entry;
3839 lang_statement_append (&file_chain,
3840 (lang_statement_union_type *) entry,
3843 /* The BFD linker needs to have a list of all input BFDs involved in
3845 ASSERT (entry->the_bfd->link_next == (bfd *) NULL);
3846 ASSERT (entry->the_bfd != output_bfd);
3847 for (pp = &link_info.input_bfds;
3848 *pp != (bfd *) NULL;
3849 pp = &(*pp)->link_next)
3851 *pp = entry->the_bfd;
3852 entry->the_bfd->usrdata = (PTR) entry;
3853 bfd_set_gp_size (entry->the_bfd, g_switch_value);
3855 /* Look through the sections and check for any which should not be
3856 included in the link. We need to do this now, so that we can
3857 notice when the backend linker tries to report multiple
3858 definition errors for symbols which are in sections we aren't
3859 going to link. FIXME: It might be better to entirely ignore
3860 symbols which are defined in sections which are going to be
3861 discarded. This would require modifying the backend linker for
3862 each backend which might set the SEC_LINK_ONCE flag. If we do
3863 this, we should probably handle SEC_EXCLUDE in the same way. */
3865 bfd_map_over_sections (entry->the_bfd, section_already_linked, (PTR) entry);
3869 lang_add_output (name, from_script)
3873 /* Make -o on command line override OUTPUT in script. */
3874 if (had_output_filename == false || !from_script)
3876 output_filename = name;
3877 had_output_filename = true;
3881 static lang_output_section_statement_type *current_section;
3893 for (l = 0; l < 32; l++)
3895 if (i >= (unsigned int) x)
3903 lang_output_section_statement_type *
3904 lang_enter_output_section_statement (output_section_statement_name,
3905 address_exp, sectype, block_value,
3906 align, subalign, ebase)
3907 const char *output_section_statement_name;
3908 etree_type *address_exp;
3909 enum section_type sectype;
3910 bfd_vma block_value;
3912 etree_type *subalign;
3915 lang_output_section_statement_type *os;
3919 lang_output_section_statement_lookup (output_section_statement_name);
3921 /* Add this statement to tree. */
3923 add_statement (lang_output_section_statement_enum,
3924 output_section_statement);
3926 /* Make next things chain into subchain of this. */
3928 if (os->addr_tree == (etree_type *) NULL)
3930 os->addr_tree = address_exp;
3932 os->sectype = sectype;
3933 if (sectype != noload_section)
3934 os->flags = SEC_NO_FLAGS;
3936 os->flags = SEC_NEVER_LOAD;
3937 os->block_value = block_value ? block_value : 1;
3938 stat_ptr = &os->children;
3940 os->subsection_alignment =
3941 topower (exp_get_value_int (subalign, -1, "subsection alignment", 0));
3942 os->section_alignment =
3943 topower (exp_get_value_int (align, -1, "section alignment", 0));
3945 os->load_base = ebase;
3952 lang_output_statement_type *new =
3953 new_stat (lang_output_statement, stat_ptr);
3955 new->name = output_filename;
3958 /* Reset the current counters in the regions. */
3961 reset_memory_regions ()
3963 lang_memory_region_type *p = lang_memory_region_list;
3966 for (p = lang_memory_region_list;
3967 p != (lang_memory_region_type *) NULL;
3970 p->old_length = (bfd_size_type) (p->current - p->origin);
3971 p->current = p->origin;
3974 for (o = output_bfd->sections; o != NULL; o = o->next)
3978 /* If the wild pattern was marked KEEP, the member sections
3979 should be as well. */
3982 gc_section_callback (ptr, sec, section, file, data)
3983 lang_wild_statement_type *ptr;
3984 struct wildcard_list *sec ATTRIBUTE_UNUSED;
3986 lang_input_statement_type *file ATTRIBUTE_UNUSED;
3987 PTR data ATTRIBUTE_UNUSED;
3989 if (ptr->keep_sections)
3990 section->flags |= SEC_KEEP;
3993 /* Handle a wild statement, marking it against GC. */
3997 lang_wild_statement_type *s;
3999 walk_wild (s, gc_section_callback, NULL);
4002 /* Iterate over sections marking them against GC. */
4005 lang_gc_sections_1 (s)
4006 lang_statement_union_type *s;
4008 for (; s != (lang_statement_union_type *) NULL; s = s->header.next)
4010 switch (s->header.type)
4012 case lang_wild_statement_enum:
4013 lang_gc_wild (&s->wild_statement);
4015 case lang_constructors_statement_enum:
4016 lang_gc_sections_1 (constructor_list.head);
4018 case lang_output_section_statement_enum:
4019 lang_gc_sections_1 (s->output_section_statement.children.head);
4021 case lang_group_statement_enum:
4022 lang_gc_sections_1 (s->group_statement.children.head);
4033 struct bfd_link_hash_entry *h;
4034 ldlang_undef_chain_list_type *ulist, fake_list_start;
4036 /* Keep all sections so marked in the link script. */
4038 lang_gc_sections_1 (statement_list.head);
4040 /* Keep all sections containing symbols undefined on the command-line.
4041 Handle the entry symbol at the same time. */
4043 if (entry_symbol != NULL)
4045 fake_list_start.next = ldlang_undef_chain_list_head;
4046 fake_list_start.name = (char *) entry_symbol;
4047 ulist = &fake_list_start;
4050 ulist = ldlang_undef_chain_list_head;
4052 for (; ulist; ulist = ulist->next)
4054 h = bfd_link_hash_lookup (link_info.hash, ulist->name,
4055 false, false, false);
4057 if (h != (struct bfd_link_hash_entry *) NULL
4058 && (h->type == bfd_link_hash_defined
4059 || h->type == bfd_link_hash_defweak)
4060 && ! bfd_is_abs_section (h->u.def.section))
4062 h->u.def.section->flags |= SEC_KEEP;
4066 bfd_gc_sections (output_bfd, &link_info);
4072 lang_reasonable_defaults ();
4073 current_target = default_target;
4075 /* Open the output file. */
4076 lang_for_each_statement (ldlang_open_output);
4078 ldemul_create_output_section_statements ();
4080 /* Add to the hash table all undefineds on the command line. */
4081 lang_place_undefineds ();
4083 already_linked_table_init ();
4085 /* Create a bfd for each input file. */
4086 current_target = default_target;
4087 open_input_bfds (statement_list.head, false);
4089 ldemul_after_open ();
4091 already_linked_table_free ();
4093 /* Make sure that we're not mixing architectures. We call this
4094 after all the input files have been opened, but before we do any
4095 other processing, so that any operations merge_private_bfd_data
4096 does on the output file will be known during the rest of the
4100 /* Handle .exports instead of a version script if we're told to do so. */
4101 if (command_line.version_exports_section)
4102 lang_do_version_exports_section ();
4104 /* Build all sets based on the information gathered from the input
4106 ldctor_build_sets ();
4108 /* Remove unreferenced sections if asked to. */
4109 if (command_line.gc_sections)
4110 lang_gc_sections ();
4112 /* If there were any SEC_MERGE sections, finish their merging, so that
4113 section sizes can be computed. This has to be done after GC of sections,
4114 so that GCed sections are not merged, but before assigning output
4115 sections, since removing whole input sections is hard then. */
4116 bfd_merge_sections (output_bfd, &link_info);
4118 /* Size up the common data. */
4121 /* Run through the contours of the script and attach input sections
4122 to the correct output sections. */
4123 map_input_to_output_sections (statement_list.head, (char *) NULL,
4124 (lang_output_section_statement_type *) NULL);
4126 /* Find any sections not attached explicitly and handle them. */
4127 lang_place_orphans ();
4129 ldemul_before_allocation ();
4131 /* We must record the program headers before we try to fix the
4132 section positions, since they will affect SIZEOF_HEADERS. */
4133 lang_record_phdrs ();
4135 /* Size up the sections. */
4136 lang_size_sections (statement_list.head,
4138 &statement_list.head, 0, (bfd_vma) 0, NULL);
4140 /* Now run around and relax if we can. */
4141 if (command_line.relax)
4143 /* Keep relaxing until bfd_relax_section gives up. */
4144 boolean relax_again;
4148 reset_memory_regions ();
4150 relax_again = false;
4152 /* Note: pe-dll.c does something like this also. If you find
4153 you need to change this code, you probably need to change
4154 pe-dll.c also. DJ */
4156 /* Do all the assignments with our current guesses as to
4158 lang_do_assignments (statement_list.head,
4160 (fill_type) 0, (bfd_vma) 0);
4162 /* Perform another relax pass - this time we know where the
4163 globals are, so can make better guess. */
4164 lang_size_sections (statement_list.head,
4166 &(statement_list.head), 0, (bfd_vma) 0,
4169 while (relax_again);
4172 /* See if anything special should be done now we know how big
4174 ldemul_after_allocation ();
4176 /* Fix any .startof. or .sizeof. symbols. */
4177 lang_set_startof ();
4179 /* Do all the assignments, now that we know the final resting places
4180 of all the symbols. */
4182 lang_do_assignments (statement_list.head,
4184 (fill_type) 0, (bfd_vma) 0);
4186 /* Make sure that the section addresses make sense. */
4187 if (! link_info.relocateable
4188 && command_line.check_section_addresses)
4189 lang_check_section_addresses ();
4197 /* EXPORTED TO YACC */
4200 lang_add_wild (filespec, section_list, keep_sections)
4201 struct wildcard_spec *filespec;
4202 struct wildcard_list *section_list;
4203 boolean keep_sections;
4205 struct wildcard_list *curr, *next;
4206 lang_wild_statement_type *new;
4208 /* Reverse the list as the parser puts it back to front. */
4209 for (curr = section_list, section_list = NULL;
4211 section_list = curr, curr = next)
4213 if (curr->spec.name != NULL && strcmp (curr->spec.name, "COMMON") == 0)
4214 placed_commons = true;
4217 curr->next = section_list;
4220 if (filespec != NULL && filespec->name != NULL)
4222 if (strcmp (filespec->name, "*") == 0)
4223 filespec->name = NULL;
4224 else if (! wildcardp (filespec->name))
4225 lang_has_input_file = true;
4228 new = new_stat (lang_wild_statement, stat_ptr);
4229 new->filename = NULL;
4230 new->filenames_sorted = false;
4231 if (filespec != NULL)
4233 new->filename = filespec->name;
4234 new->filenames_sorted = filespec->sorted;
4236 new->section_list = section_list;
4237 new->keep_sections = keep_sections;
4238 lang_list_init (&new->children);
4242 lang_section_start (name, address)
4244 etree_type *address;
4246 lang_address_statement_type *ad;
4248 ad = new_stat (lang_address_statement, stat_ptr);
4249 ad->section_name = name;
4250 ad->address = address;
4253 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
4254 because of a -e argument on the command line, or zero if this is
4255 called by ENTRY in a linker script. Command line arguments take
4259 lang_add_entry (name, cmdline)
4263 if (entry_symbol == NULL
4265 || ! entry_from_cmdline)
4267 entry_symbol = name;
4268 entry_from_cmdline = cmdline;
4273 lang_add_target (name)
4276 lang_target_statement_type *new = new_stat (lang_target_statement,
4292 map_option_f = true;
4303 lang_fill_statement_type *new = new_stat (lang_fill_statement,
4310 lang_add_data (type, exp)
4312 union etree_union *exp;
4315 lang_data_statement_type *new = new_stat (lang_data_statement,
4323 /* Create a new reloc statement. RELOC is the BFD relocation type to
4324 generate. HOWTO is the corresponding howto structure (we could
4325 look this up, but the caller has already done so). SECTION is the
4326 section to generate a reloc against, or NAME is the name of the
4327 symbol to generate a reloc against. Exactly one of SECTION and
4328 NAME must be NULL. ADDEND is an expression for the addend. */
4331 lang_add_reloc (reloc, howto, section, name, addend)
4332 bfd_reloc_code_real_type reloc;
4333 reloc_howto_type *howto;
4336 union etree_union *addend;
4338 lang_reloc_statement_type *p = new_stat (lang_reloc_statement, stat_ptr);
4342 p->section = section;
4344 p->addend_exp = addend;
4346 p->addend_value = 0;
4347 p->output_section = NULL;
4351 lang_assignment_statement_type *
4352 lang_add_assignment (exp)
4355 lang_assignment_statement_type *new = new_stat (lang_assignment_statement,
4363 lang_add_attribute (attribute)
4364 enum statement_enum attribute;
4366 new_statement (attribute, sizeof (lang_statement_union_type), stat_ptr);
4373 if (startup_file != (char *) NULL)
4375 einfo (_("%P%Fmultiple STARTUP files\n"));
4377 first_file->filename = name;
4378 first_file->local_sym_name = name;
4379 first_file->real = true;
4381 startup_file = name;
4388 lang_float_flag = maybe;
4392 lang_leave_output_section_statement (fill, memspec, phdrs, lma_memspec)
4394 const char *memspec;
4395 struct lang_output_section_phdr_list *phdrs;
4396 const char *lma_memspec;
4398 current_section->fill = fill;
4399 current_section->region = lang_memory_region_lookup (memspec);
4400 if (strcmp (lma_memspec, "*default*") != 0)
4402 current_section->lma_region = lang_memory_region_lookup (lma_memspec);
4403 /* If no runtime region has been given, but the load region has
4404 been, use the load region. */
4405 if (strcmp (memspec, "*default*") == 0)
4406 current_section->region = lang_memory_region_lookup (lma_memspec);
4408 current_section->phdrs = phdrs;
4409 stat_ptr = &statement_list;
4412 /* Create an absolute symbol with the given name with the value of the
4413 address of first byte of the section named.
4415 If the symbol already exists, then do nothing. */
4418 lang_abs_symbol_at_beginning_of (secname, name)
4419 const char *secname;
4422 struct bfd_link_hash_entry *h;
4424 h = bfd_link_hash_lookup (link_info.hash, name, true, true, true);
4425 if (h == (struct bfd_link_hash_entry *) NULL)
4426 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4428 if (h->type == bfd_link_hash_new
4429 || h->type == bfd_link_hash_undefined)
4433 h->type = bfd_link_hash_defined;
4435 sec = bfd_get_section_by_name (output_bfd, secname);
4436 if (sec == (asection *) NULL)
4439 h->u.def.value = bfd_get_section_vma (output_bfd, sec);
4441 h->u.def.section = bfd_abs_section_ptr;
4445 /* Create an absolute symbol with the given name with the value of the
4446 address of the first byte after the end of the section named.
4448 If the symbol already exists, then do nothing. */
4451 lang_abs_symbol_at_end_of (secname, name)
4452 const char *secname;
4455 struct bfd_link_hash_entry *h;
4457 h = bfd_link_hash_lookup (link_info.hash, name, true, true, true);
4458 if (h == (struct bfd_link_hash_entry *) NULL)
4459 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4461 if (h->type == bfd_link_hash_new
4462 || h->type == bfd_link_hash_undefined)
4466 h->type = bfd_link_hash_defined;
4468 sec = bfd_get_section_by_name (output_bfd, secname);
4469 if (sec == (asection *) NULL)
4472 h->u.def.value = (bfd_get_section_vma (output_bfd, sec)
4473 + bfd_section_size (output_bfd, sec) /
4474 bfd_octets_per_byte (output_bfd));
4476 h->u.def.section = bfd_abs_section_ptr;
4481 lang_statement_append (list, element, field)
4482 lang_statement_list_type *list;
4483 lang_statement_union_type *element;
4484 lang_statement_union_type **field;
4486 *(list->tail) = element;
4490 /* Set the output format type. -oformat overrides scripts. */
4493 lang_add_output_format (format, big, little, from_script)
4499 if (output_target == NULL || !from_script)
4501 if (command_line.endian == ENDIAN_BIG
4504 else if (command_line.endian == ENDIAN_LITTLE
4508 output_target = format;
4512 /* Enter a group. This creates a new lang_group_statement, and sets
4513 stat_ptr to build new statements within the group. */
4518 lang_group_statement_type *g;
4520 g = new_stat (lang_group_statement, stat_ptr);
4521 lang_list_init (&g->children);
4522 stat_ptr = &g->children;
4525 /* Leave a group. This just resets stat_ptr to start writing to the
4526 regular list of statements again. Note that this will not work if
4527 groups can occur inside anything else which can adjust stat_ptr,
4528 but currently they can't. */
4533 stat_ptr = &statement_list;
4536 /* Add a new program header. This is called for each entry in a PHDRS
4537 command in a linker script. */
4540 lang_new_phdr (name, type, filehdr, phdrs, at, flags)
4548 struct lang_phdr *n, **pp;
4550 n = (struct lang_phdr *) stat_alloc (sizeof (struct lang_phdr));
4553 n->type = exp_get_value_int (type, 0, "program header type",
4554 lang_final_phase_enum);
4555 n->filehdr = filehdr;
4560 for (pp = &lang_phdr_list; *pp != NULL; pp = &(*pp)->next)
4565 /* Record the program header information in the output BFD. FIXME: We
4566 should not be calling an ELF specific function here. */
4569 lang_record_phdrs ()
4573 struct lang_output_section_phdr_list *last;
4574 struct lang_phdr *l;
4575 lang_statement_union_type *u;
4578 secs = (asection **) xmalloc (alc * sizeof (asection *));
4580 for (l = lang_phdr_list; l != NULL; l = l->next)
4587 for (u = lang_output_section_statement.head;
4589 u = u->output_section_statement.next)
4591 lang_output_section_statement_type *os;
4592 struct lang_output_section_phdr_list *pl;
4594 os = &u->output_section_statement;
4601 if (os->sectype == noload_section
4602 || os->bfd_section == NULL
4603 || (os->bfd_section->flags & SEC_ALLOC) == 0)
4608 if (os->bfd_section == NULL)
4611 for (; pl != NULL; pl = pl->next)
4613 if (strcmp (pl->name, l->name) == 0)
4618 secs = ((asection **)
4619 xrealloc (secs, alc * sizeof (asection *)));
4621 secs[c] = os->bfd_section;
4628 if (l->flags == NULL)
4631 flags = exp_get_vma (l->flags, 0, "phdr flags",
4632 lang_final_phase_enum);
4637 at = exp_get_vma (l->at, 0, "phdr load address",
4638 lang_final_phase_enum);
4640 if (! bfd_record_phdr (output_bfd, l->type,
4641 l->flags != NULL, flags, l->at != NULL,
4642 at, l->filehdr, l->phdrs, c, secs))
4643 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
4648 /* Make sure all the phdr assignments succeeded. */
4649 for (u = lang_output_section_statement.head;
4651 u = u->output_section_statement.next)
4653 struct lang_output_section_phdr_list *pl;
4655 if (u->output_section_statement.bfd_section == NULL)
4658 for (pl = u->output_section_statement.phdrs;
4661 if (! pl->used && strcmp (pl->name, "NONE") != 0)
4662 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
4663 u->output_section_statement.name, pl->name);
4667 /* Record a list of sections which may not be cross referenced. */
4670 lang_add_nocrossref (l)
4671 struct lang_nocrossref *l;
4673 struct lang_nocrossrefs *n;
4675 n = (struct lang_nocrossrefs *) xmalloc (sizeof *n);
4676 n->next = nocrossref_list;
4678 nocrossref_list = n;
4680 /* Set notice_all so that we get informed about all symbols. */
4681 link_info.notice_all = true;
4684 /* Overlay handling. We handle overlays with some static variables. */
4686 /* The overlay virtual address. */
4687 static etree_type *overlay_vma;
4689 /* The overlay load address. */
4690 static etree_type *overlay_lma;
4692 /* Whether nocrossrefs is set for this overlay. */
4693 static int overlay_nocrossrefs;
4695 /* An expression for the maximum section size seen so far. */
4696 static etree_type *overlay_max;
4698 /* A list of all the sections in this overlay. */
4700 struct overlay_list {
4701 struct overlay_list *next;
4702 lang_output_section_statement_type *os;
4705 static struct overlay_list *overlay_list;
4707 /* Start handling an overlay. */
4710 lang_enter_overlay (vma_expr, lma_expr, nocrossrefs)
4711 etree_type *vma_expr;
4712 etree_type *lma_expr;
4715 /* The grammar should prevent nested overlays from occurring. */
4716 ASSERT (overlay_vma == NULL
4717 && overlay_lma == NULL
4718 && overlay_list == NULL
4719 && overlay_max == NULL);
4721 overlay_vma = vma_expr;
4722 overlay_lma = lma_expr;
4723 overlay_nocrossrefs = nocrossrefs;
4726 /* Start a section in an overlay. We handle this by calling
4727 lang_enter_output_section_statement with the correct VMA and LMA. */
4730 lang_enter_overlay_section (name)
4733 struct overlay_list *n;
4736 lang_enter_output_section_statement (name, overlay_vma, normal_section,
4737 0, 0, 0, overlay_lma);
4739 /* If this is the first section, then base the VMA and LMA of future
4740 sections on this one. This will work correctly even if `.' is
4741 used in the addresses. */
4742 if (overlay_list == NULL)
4744 overlay_vma = exp_nameop (ADDR, name);
4745 overlay_lma = exp_nameop (LOADADDR, name);
4748 /* Remember the section. */
4749 n = (struct overlay_list *) xmalloc (sizeof *n);
4750 n->os = current_section;
4751 n->next = overlay_list;
4754 size = exp_nameop (SIZEOF, name);
4756 /* Adjust the LMA for the next section. */
4757 overlay_lma = exp_binop ('+', overlay_lma, size);
4759 /* Arrange to work out the maximum section end address. */
4760 if (overlay_max == NULL)
4763 overlay_max = exp_binop (MAX_K, overlay_max, size);
4766 /* Finish a section in an overlay. There isn't any special to do
4770 lang_leave_overlay_section (fill, phdrs)
4772 struct lang_output_section_phdr_list *phdrs;
4779 name = current_section->name;
4781 lang_leave_output_section_statement (fill, "*default*",
4782 phdrs, "*default*");
4784 /* Define the magic symbols. */
4786 clean = xmalloc (strlen (name) + 1);
4788 for (s1 = name; *s1 != '\0'; s1++)
4789 if (ISALNUM (*s1) || *s1 == '_')
4793 buf = xmalloc (strlen (clean) + sizeof "__load_start_");
4794 sprintf (buf, "__load_start_%s", clean);
4795 lang_add_assignment (exp_assop ('=', buf,
4796 exp_nameop (LOADADDR, name)));
4798 buf = xmalloc (strlen (clean) + sizeof "__load_stop_");
4799 sprintf (buf, "__load_stop_%s", clean);
4800 lang_add_assignment (exp_assop ('=', buf,
4802 exp_nameop (LOADADDR, name),
4803 exp_nameop (SIZEOF, name))));
4808 /* Finish an overlay. If there are any overlay wide settings, this
4809 looks through all the sections in the overlay and sets them. */
4812 lang_leave_overlay (fill, memspec, phdrs, lma_memspec)
4814 const char *memspec;
4815 struct lang_output_section_phdr_list *phdrs;
4816 const char *lma_memspec;
4818 lang_memory_region_type *region;
4819 lang_memory_region_type * default_region;
4820 lang_memory_region_type *lma_region;
4821 struct overlay_list *l;
4822 struct lang_nocrossref *nocrossref;
4824 default_region = lang_memory_region_lookup ("*default*");
4826 if (memspec == NULL)
4829 region = lang_memory_region_lookup (memspec);
4831 if (lma_memspec == NULL)
4834 lma_region = lang_memory_region_lookup (lma_memspec);
4841 struct overlay_list *next;
4843 if (fill != 0 && l->os->fill == 0)
4846 /* Assign a region to the sections, if one has been specified.
4847 Override the assignment of the default section, but not
4849 if (region != NULL &&
4850 (l->os->region == NULL ||
4851 l->os->region == default_region))
4852 l->os->region = region;
4854 /* We only set lma_region for the first overlay section, as
4855 subsequent overlay sections will have load_base set relative
4856 to the first section. Also, don't set lma_region if
4857 load_base is specified. FIXME: There should really be a test
4858 that `AT ( LDADDR )' doesn't conflict with `AT >LMA_REGION'
4859 rather than letting LDADDR simply override LMA_REGION. */
4860 if (lma_region != NULL && l->os->lma_region == NULL
4861 && l->next == NULL && l->os->load_base == NULL)
4862 l->os->lma_region = lma_region;
4864 if (phdrs != NULL && l->os->phdrs == NULL)
4865 l->os->phdrs = phdrs;
4867 if (overlay_nocrossrefs)
4869 struct lang_nocrossref *nc;
4871 nc = (struct lang_nocrossref *) xmalloc (sizeof *nc);
4872 nc->name = l->os->name;
4873 nc->next = nocrossref;
4882 if (nocrossref != NULL)
4883 lang_add_nocrossref (nocrossref);
4885 /* Update . for the end of the overlay. */
4886 lang_add_assignment (exp_assop ('=', ".",
4887 exp_binop ('+', overlay_vma, overlay_max)));
4891 overlay_nocrossrefs = 0;
4892 overlay_list = NULL;
4896 /* Version handling. This is only useful for ELF. */
4898 /* This global variable holds the version tree that we build. */
4900 struct bfd_elf_version_tree *lang_elf_version_info;
4903 lang_vers_match_lang_c (expr, sym)
4904 struct bfd_elf_version_expr *expr;
4907 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
4909 return fnmatch (expr->pattern, sym, 0) == 0;
4913 lang_vers_match_lang_cplusplus (expr, sym)
4914 struct bfd_elf_version_expr *expr;
4920 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
4923 alt_sym = cplus_demangle (sym, /* DMGL_NO_TPARAMS */ 0);
4926 /* cplus_demangle (also) returns NULL when it is not a C++ symbol.
4927 Should we early out false in this case? */
4928 result = fnmatch (expr->pattern, sym, 0) == 0;
4932 result = fnmatch (expr->pattern, alt_sym, 0) == 0;
4940 lang_vers_match_lang_java (expr, sym)
4941 struct bfd_elf_version_expr *expr;
4947 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
4950 alt_sym = cplus_demangle (sym, DMGL_JAVA);
4953 /* cplus_demangle (also) returns NULL when it is not a Java symbol.
4954 Should we early out false in this case? */
4955 result = fnmatch (expr->pattern, sym, 0) == 0;
4959 result = fnmatch (expr->pattern, alt_sym, 0) == 0;
4966 /* This is called for each variable name or match expression. */
4968 struct bfd_elf_version_expr *
4969 lang_new_vers_regex (orig, new, lang)
4970 struct bfd_elf_version_expr *orig;
4974 struct bfd_elf_version_expr *ret;
4976 ret = (struct bfd_elf_version_expr *) xmalloc (sizeof *ret);
4980 if (lang == NULL || strcasecmp (lang, "C") == 0)
4981 ret->match = lang_vers_match_lang_c;
4982 else if (strcasecmp (lang, "C++") == 0)
4983 ret->match = lang_vers_match_lang_cplusplus;
4984 else if (strcasecmp (lang, "Java") == 0)
4985 ret->match = lang_vers_match_lang_java;
4988 einfo (_("%X%P: unknown language `%s' in version information\n"),
4990 ret->match = lang_vers_match_lang_c;
4996 /* This is called for each set of variable names and match
4999 struct bfd_elf_version_tree *
5000 lang_new_vers_node (globals, locals)
5001 struct bfd_elf_version_expr *globals;
5002 struct bfd_elf_version_expr *locals;
5004 struct bfd_elf_version_tree *ret;
5006 ret = (struct bfd_elf_version_tree *) xmalloc (sizeof *ret);
5010 ret->globals = globals;
5011 ret->locals = locals;
5013 ret->name_indx = (unsigned int) -1;
5018 /* This static variable keeps track of version indices. */
5020 static int version_index;
5022 /* This is called when we know the name and dependencies of the
5026 lang_register_vers_node (name, version, deps)
5028 struct bfd_elf_version_tree *version;
5029 struct bfd_elf_version_deps *deps;
5031 struct bfd_elf_version_tree *t, **pp;
5032 struct bfd_elf_version_expr *e1;
5034 /* Make sure this node has a unique name. */
5035 for (t = lang_elf_version_info; t != NULL; t = t->next)
5036 if (strcmp (t->name, name) == 0)
5037 einfo (_("%X%P: duplicate version tag `%s'\n"), name);
5039 /* Check the global and local match names, and make sure there
5040 aren't any duplicates. */
5042 for (e1 = version->globals; e1 != NULL; e1 = e1->next)
5044 for (t = lang_elf_version_info; t != NULL; t = t->next)
5046 struct bfd_elf_version_expr *e2;
5048 for (e2 = t->locals; e2 != NULL; e2 = e2->next)
5049 if (strcmp (e1->pattern, e2->pattern) == 0)
5050 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5055 for (e1 = version->locals; e1 != NULL; e1 = e1->next)
5057 for (t = lang_elf_version_info; t != NULL; t = t->next)
5059 struct bfd_elf_version_expr *e2;
5061 for (e2 = t->globals; e2 != NULL; e2 = e2->next)
5062 if (strcmp (e1->pattern, e2->pattern) == 0)
5063 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5068 version->deps = deps;
5069 version->name = name;
5071 version->vernum = version_index;
5073 for (pp = &lang_elf_version_info; *pp != NULL; pp = &(*pp)->next)
5078 /* This is called when we see a version dependency. */
5080 struct bfd_elf_version_deps *
5081 lang_add_vers_depend (list, name)
5082 struct bfd_elf_version_deps *list;
5085 struct bfd_elf_version_deps *ret;
5086 struct bfd_elf_version_tree *t;
5088 ret = (struct bfd_elf_version_deps *) xmalloc (sizeof *ret);
5091 for (t = lang_elf_version_info; t != NULL; t = t->next)
5093 if (strcmp (t->name, name) == 0)
5095 ret->version_needed = t;
5100 einfo (_("%X%P: unable to find version dependency `%s'\n"), name);
5106 lang_do_version_exports_section ()
5108 struct bfd_elf_version_expr *greg = NULL, *lreg;
5110 LANG_FOR_EACH_INPUT_STATEMENT (is)
5112 asection *sec = bfd_get_section_by_name (is->the_bfd, ".exports");
5119 len = bfd_section_size (is->the_bfd, sec);
5120 contents = xmalloc (len);
5121 if (!bfd_get_section_contents (is->the_bfd, sec, contents, 0, len))
5122 einfo (_("%X%P: unable to read .exports section contents\n"), sec);
5125 while (p < contents + len)
5127 greg = lang_new_vers_regex (greg, p, NULL);
5128 p = strchr (p, '\0') + 1;
5131 /* Do not free the contents, as we used them creating the regex. */
5133 /* Do not include this section in the link. */
5134 bfd_set_section_flags (is->the_bfd, sec,
5135 bfd_get_section_flags (is->the_bfd, sec) | SEC_EXCLUDE);
5138 lreg = lang_new_vers_regex (NULL, "*", NULL);
5139 lang_register_vers_node (command_line.version_exports_section,
5140 lang_new_vers_node (greg, lreg), NULL);
5144 lang_add_unique (name)
5147 struct unique_sections *ent;
5149 for (ent = unique_section_list; ent; ent = ent->next)
5150 if (strcmp (ent->name, name) == 0)
5153 ent = (struct unique_sections *) xmalloc (sizeof *ent);
5154 ent->name = xstrdup (name);
5155 ent->next = unique_section_list;
5156 unique_section_list = ent;