1 /* Linker command language support.
2 Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000
3 Free Software Foundation, Inc.
5 This file is part of GLD, the Gnu Linker.
7 GLD is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GLD is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GLD; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
24 #include "libiberty.h"
44 static lang_statement_union_type *new_statement PARAMS ((enum statement_enum,
46 lang_statement_list_type*));
50 static struct obstack stat_obstack;
52 #define obstack_chunk_alloc xmalloc
53 #define obstack_chunk_free free
54 static CONST char *startup_file;
55 static lang_statement_list_type input_file_chain;
56 static boolean placed_commons = false;
57 static lang_output_section_statement_type *default_common_section;
58 static boolean map_option_f;
59 static bfd_vma print_dot;
60 static lang_input_statement_type *first_file;
61 static lang_statement_list_type lang_output_section_statement;
62 static CONST char *current_target;
63 static CONST char *output_target;
64 static lang_statement_list_type statement_list;
65 static struct lang_phdr *lang_phdr_list;
67 static void lang_for_each_statement_worker
68 PARAMS ((void (*func) (lang_statement_union_type *),
69 lang_statement_union_type *s));
70 static lang_input_statement_type *new_afile
71 PARAMS ((const char *name, lang_input_file_enum_type file_type,
72 const char *target, boolean add_to_list));
73 static void init_os PARAMS ((lang_output_section_statement_type *s));
74 static void exp_init_os PARAMS ((etree_type *));
75 static void section_already_linked PARAMS ((bfd *, asection *, PTR));
76 static struct bfd_hash_entry *already_linked_newfunc
77 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *,
79 static void already_linked_table_init PARAMS ((void));
80 static void already_linked_table_free PARAMS ((void));
81 static boolean wildcardp PARAMS ((const char *));
82 static lang_statement_union_type *wild_sort
83 PARAMS ((lang_wild_statement_type *, lang_input_statement_type *,
85 static lang_input_statement_type *lookup_name PARAMS ((const char *name));
86 static void load_symbols PARAMS ((lang_input_statement_type *entry,
87 lang_statement_list_type *));
88 static void wild PARAMS ((lang_wild_statement_type *s,
89 const char *section, const char *file,
91 lang_output_section_statement_type *output));
92 static bfd *open_output PARAMS ((const char *name));
93 static void ldlang_open_output PARAMS ((lang_statement_union_type *statement));
94 static void open_input_bfds
95 PARAMS ((lang_statement_union_type *statement, boolean));
96 static void lang_reasonable_defaults PARAMS ((void));
97 static void lang_place_undefineds PARAMS ((void));
98 static void map_input_to_output_sections
99 PARAMS ((lang_statement_union_type *s,
101 lang_output_section_statement_type *output_section_statement));
102 static void print_output_section_statement
103 PARAMS ((lang_output_section_statement_type *output_section_statement));
104 static void print_assignment
105 PARAMS ((lang_assignment_statement_type *assignment,
106 lang_output_section_statement_type *output_section));
107 static void print_input_statement PARAMS ((lang_input_statement_type *statm));
108 static boolean print_one_symbol PARAMS ((struct bfd_link_hash_entry *, PTR));
109 static void print_input_section PARAMS ((lang_input_section_type *in));
110 static void print_fill_statement PARAMS ((lang_fill_statement_type *fill));
111 static void print_data_statement PARAMS ((lang_data_statement_type *data));
112 static void print_address_statement PARAMS ((lang_address_statement_type *));
113 static void print_reloc_statement PARAMS ((lang_reloc_statement_type *reloc));
114 static void print_padding_statement PARAMS ((lang_padding_statement_type *s));
115 static void print_wild_statement
116 PARAMS ((lang_wild_statement_type *w,
117 lang_output_section_statement_type *os));
118 static void print_group
119 PARAMS ((lang_group_statement_type *, lang_output_section_statement_type *));
120 static void print_statement PARAMS ((lang_statement_union_type *s,
121 lang_output_section_statement_type *os));
122 static void print_statement_list PARAMS ((lang_statement_union_type *s,
123 lang_output_section_statement_type *os));
124 static void print_statements PARAMS ((void));
125 static bfd_vma insert_pad PARAMS ((lang_statement_union_type **this_ptr,
126 fill_type fill, unsigned int power,
127 asection *output_section_statement,
129 static bfd_vma size_input_section
130 PARAMS ((lang_statement_union_type **this_ptr,
131 lang_output_section_statement_type *output_section_statement,
132 fill_type fill, bfd_vma dot, boolean relax));
133 static void lang_finish PARAMS ((void));
134 static void ignore_bfd_errors PARAMS ((const char *, ...));
135 static void lang_check PARAMS ((void));
136 static void lang_common PARAMS ((void));
137 static boolean lang_one_common PARAMS ((struct bfd_link_hash_entry *, PTR));
138 static void lang_place_orphans PARAMS ((void));
139 static int topower PARAMS ((int));
140 static void lang_set_startof PARAMS ((void));
141 static void reset_memory_regions PARAMS ((void));
142 static void lang_record_phdrs PARAMS ((void));
143 static void lang_gc_wild
144 PARAMS ((lang_wild_statement_type *, const char *, const char *));
145 static void lang_gc_sections_1 PARAMS ((lang_statement_union_type *));
146 static void lang_gc_sections PARAMS ((void));
147 static void lang_do_version_exports_section PARAMS ((void));
148 static void lang_check_section_addresses PARAMS ((void));
150 typedef void (*callback_t) PARAMS ((lang_wild_statement_type *,
151 asection *, lang_input_statement_type *,
153 static void walk_wild_section
154 PARAMS ((lang_wild_statement_type *, const char *,
155 lang_input_statement_type *, callback_t, void *));
156 static void walk_wild_file
157 PARAMS ((lang_wild_statement_type *, const char *,
158 lang_input_statement_type *, callback_t, void *));
160 static int get_target PARAMS ((const bfd_target *, void *));
161 static void stricpy PARAMS ((char *, char *));
162 static void strcut PARAMS ((char *, char *));
163 static int name_compare PARAMS ((char *, char *));
164 static int closest_target_match PARAMS ((const bfd_target *, void *));
165 static char * get_first_input_target PARAMS ((void));
168 lang_output_section_statement_type *abs_output_section;
169 lang_statement_list_type *stat_ptr = &statement_list;
170 lang_statement_list_type file_chain = { NULL, NULL };
171 const char *entry_symbol = NULL;
172 boolean entry_from_cmdline;
173 boolean lang_has_input_file = false;
174 boolean had_output_filename = false;
175 boolean lang_float_flag = false;
176 boolean delete_output_file_on_failure = false;
177 struct lang_nocrossrefs *nocrossref_list;
179 etree_type *base; /* Relocation base - or null */
182 #if defined(__STDC__) || defined(ALMOST_STDC)
183 #define cat(a,b) a##b
185 #define cat(a,b) a/**/b
188 #define new_stat(x,y) (cat(x,_type)*) new_statement(cat(x,_enum), sizeof(cat(x,_type)),y)
190 #define outside_section_address(q) ( (q)->output_offset + (q)->output_section->vma)
192 #define outside_symbol_address(q) ((q)->value + outside_section_address(q->section))
194 #define SECTION_NAME_MAP_LENGTH (16)
200 return obstack_alloc (&stat_obstack, size);
203 /*----------------------------------------------------------------------
204 Generic traversal routines for finding matching sections.
208 walk_wild_section (ptr, section, file, callback, data)
209 lang_wild_statement_type *ptr;
211 lang_input_statement_type *file;
215 /* Don't process sections from files which were excluded. */
216 if (ptr->exclude_filename_list != NULL)
218 struct name_list *list_tmp;
219 for (list_tmp = ptr->exclude_filename_list; list_tmp; list_tmp = list_tmp->next)
223 if (wildcardp (list_tmp->name))
224 match = fnmatch (list_tmp->name, file->filename, 0) == 0 ? true : false;
226 match = strcmp (list_tmp->name, file->filename) == 0 ? true : false;
233 if (file->just_syms_flag == false)
235 register asection *s;
241 wildcard = wildcardp (section);
243 for (s = file->the_bfd->sections; s != NULL; s = s->next)
253 name = bfd_get_section_name (file->the_bfd, s);
255 match = fnmatch (section, name, 0) == 0 ? true : false;
257 match = strcmp (section, name) == 0 ? true : false;
261 (*callback) (ptr, s, file, data);
266 /* Handle a wild statement for a single file F. */
269 walk_wild_file (s, section, f, callback, data)
270 lang_wild_statement_type *s;
272 lang_input_statement_type *f;
276 if (f->the_bfd == NULL
277 || ! bfd_check_format (f->the_bfd, bfd_archive))
278 walk_wild_section (s, section, f, callback, data);
283 /* This is an archive file. We must map each member of the
284 archive separately. */
285 member = bfd_openr_next_archived_file (f->the_bfd, (bfd *) NULL);
286 while (member != NULL)
288 /* When lookup_name is called, it will call the add_symbols
289 entry point for the archive. For each element of the
290 archive which is included, BFD will call ldlang_add_file,
291 which will set the usrdata field of the member to the
292 lang_input_statement. */
293 if (member->usrdata != NULL)
295 walk_wild_section (s, section,
296 (lang_input_statement_type *) member->usrdata,
300 member = bfd_openr_next_archived_file (f->the_bfd, member);
306 walk_wild (s, section, file, callback, data)
307 lang_wild_statement_type *s;
313 if (file == (char *) NULL)
315 /* Perform the iteration over all files in the list. */
316 LANG_FOR_EACH_INPUT_STATEMENT (f)
318 walk_wild_file (s, section, f, callback, data);
321 else if (wildcardp (file))
323 LANG_FOR_EACH_INPUT_STATEMENT (f)
325 if (fnmatch (file, f->filename, FNM_FILE_NAME) == 0)
326 walk_wild_file (s, section, f, callback, data);
331 lang_input_statement_type *f;
333 /* Perform the iteration over a single file. */
334 f = lookup_name (file);
335 walk_wild_file (s, section, f, callback, data);
339 /*----------------------------------------------------------------------
340 lang_for_each_statement walks the parse tree and calls the provided
341 function for each node
345 lang_for_each_statement_worker (func, s)
346 void (*func) PARAMS ((lang_statement_union_type *));
347 lang_statement_union_type *s;
349 for (; s != (lang_statement_union_type *) NULL; s = s->next)
353 switch (s->header.type)
355 case lang_constructors_statement_enum:
356 lang_for_each_statement_worker (func, constructor_list.head);
358 case lang_output_section_statement_enum:
359 lang_for_each_statement_worker
361 s->output_section_statement.children.head);
363 case lang_wild_statement_enum:
364 lang_for_each_statement_worker
366 s->wild_statement.children.head);
368 case lang_group_statement_enum:
369 lang_for_each_statement_worker (func,
370 s->group_statement.children.head);
372 case lang_data_statement_enum:
373 case lang_reloc_statement_enum:
374 case lang_object_symbols_statement_enum:
375 case lang_output_statement_enum:
376 case lang_target_statement_enum:
377 case lang_input_section_enum:
378 case lang_input_statement_enum:
379 case lang_assignment_statement_enum:
380 case lang_padding_statement_enum:
381 case lang_address_statement_enum:
382 case lang_fill_statement_enum:
392 lang_for_each_statement (func)
393 void (*func) PARAMS ((lang_statement_union_type *));
395 lang_for_each_statement_worker (func,
396 statement_list.head);
399 /*----------------------------------------------------------------------*/
401 lang_list_init (list)
402 lang_statement_list_type *list;
404 list->head = (lang_statement_union_type *) NULL;
405 list->tail = &list->head;
408 /*----------------------------------------------------------------------
410 build a new statement node for the parse tree
415 lang_statement_union_type *
416 new_statement (type, size, list)
417 enum statement_enum type;
419 lang_statement_list_type * list;
421 lang_statement_union_type *new = (lang_statement_union_type *)
424 new->header.type = type;
425 new->header.next = (lang_statement_union_type *) NULL;
426 lang_statement_append (list, new, &new->header.next);
431 Build a new input file node for the language. There are several ways
432 in which we treat an input file, eg, we only look at symbols, or
433 prefix it with a -l etc.
435 We can be supplied with requests for input files more than once;
436 they may, for example be split over serveral lines like foo.o(.text)
437 foo.o(.data) etc, so when asked for a file we check that we havn't
438 got it already so we don't duplicate the bfd.
441 static lang_input_statement_type *
442 new_afile (name, file_type, target, add_to_list)
444 lang_input_file_enum_type file_type;
448 lang_input_statement_type *p;
451 p = new_stat (lang_input_statement, stat_ptr);
454 p = ((lang_input_statement_type *)
455 stat_alloc (sizeof (lang_input_statement_type)));
456 p->header.next = NULL;
459 lang_has_input_file = true;
463 case lang_input_file_is_symbols_only_enum:
465 p->is_archive = false;
467 p->local_sym_name = name;
468 p->just_syms_flag = true;
469 p->search_dirs_flag = false;
471 case lang_input_file_is_fake_enum:
473 p->is_archive = false;
475 p->local_sym_name = name;
476 p->just_syms_flag = false;
477 p->search_dirs_flag = false;
479 case lang_input_file_is_l_enum:
480 p->is_archive = true;
483 p->local_sym_name = concat ("-l", name, (const char *) NULL);
484 p->just_syms_flag = false;
485 p->search_dirs_flag = true;
487 case lang_input_file_is_marker_enum:
489 p->is_archive = false;
491 p->local_sym_name = name;
492 p->just_syms_flag = false;
493 p->search_dirs_flag = true;
495 case lang_input_file_is_search_file_enum:
497 p->is_archive = false;
499 p->local_sym_name = name;
500 p->just_syms_flag = false;
501 p->search_dirs_flag = true;
503 case lang_input_file_is_file_enum:
505 p->is_archive = false;
507 p->local_sym_name = name;
508 p->just_syms_flag = false;
509 p->search_dirs_flag = false;
514 p->the_bfd = (bfd *) NULL;
515 p->asymbols = (asymbol **) NULL;
516 p->next_real_file = (lang_statement_union_type *) NULL;
517 p->next = (lang_statement_union_type *) NULL;
519 p->dynamic = config.dynamic_link;
520 p->whole_archive = whole_archive;
522 lang_statement_append (&input_file_chain,
523 (lang_statement_union_type *) p,
528 lang_input_statement_type *
529 lang_add_input_file (name, file_type, target)
531 lang_input_file_enum_type file_type;
534 lang_has_input_file = true;
535 return new_afile (name, file_type, target, true);
538 /* Build enough state so that the parser can build its tree */
542 obstack_begin (&stat_obstack, 1000);
544 stat_ptr = &statement_list;
546 lang_list_init (stat_ptr);
548 lang_list_init (&input_file_chain);
549 lang_list_init (&lang_output_section_statement);
550 lang_list_init (&file_chain);
551 first_file = lang_add_input_file ((char *) NULL,
552 lang_input_file_is_marker_enum,
554 abs_output_section = lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME);
556 abs_output_section->bfd_section = bfd_abs_section_ptr;
560 /*----------------------------------------------------------------------
561 A region is an area of memory declared with the
562 MEMORY { name:org=exp, len=exp ... }
565 We maintain a list of all the regions here
567 If no regions are specified in the script, then the default is used
568 which is created when looked up to be the entire data space
571 static lang_memory_region_type *lang_memory_region_list;
572 static lang_memory_region_type **lang_memory_region_list_tail = &lang_memory_region_list;
574 lang_memory_region_type *
575 lang_memory_region_lookup (name)
576 CONST char *CONST name;
578 lang_memory_region_type *p;
580 for (p = lang_memory_region_list;
581 p != (lang_memory_region_type *) NULL;
584 if (strcmp (p->name, name) == 0)
591 /* This code used to always use the first region in the list as the
592 default region. I changed it to instead use a region
593 encompassing all of memory as the default region. This permits
594 NOLOAD sections to work reasonably without requiring a region.
595 People should specify what region they mean, if they really want
597 if (strcmp (name, "*default*") == 0)
599 if (lang_memory_region_list != (lang_memory_region_type *) NULL)
601 return lang_memory_region_list;
607 lang_memory_region_type *new =
608 (lang_memory_region_type *) stat_alloc (sizeof (lang_memory_region_type));
610 new->name = buystring (name);
611 new->next = (lang_memory_region_type *) NULL;
613 *lang_memory_region_list_tail = new;
614 lang_memory_region_list_tail = &new->next;
618 new->length = ~(bfd_size_type)0;
620 new->had_full_message = false;
627 lang_memory_region_type *
628 lang_memory_default (section)
631 lang_memory_region_type *p;
633 flagword sec_flags = section->flags;
635 /* Override SEC_DATA to mean a writable section. */
636 if ((sec_flags & (SEC_ALLOC | SEC_READONLY | SEC_CODE)) == SEC_ALLOC)
637 sec_flags |= SEC_DATA;
639 for (p = lang_memory_region_list;
640 p != (lang_memory_region_type *) NULL;
643 if ((p->flags & sec_flags) != 0
644 && (p->not_flags & sec_flags) == 0)
649 return lang_memory_region_lookup ("*default*");
652 lang_output_section_statement_type *
653 lang_output_section_find (name)
654 CONST char *CONST name;
656 lang_statement_union_type *u;
657 lang_output_section_statement_type *lookup;
659 for (u = lang_output_section_statement.head;
660 u != (lang_statement_union_type *) NULL;
663 lookup = &u->output_section_statement;
664 if (strcmp (name, lookup->name) == 0)
669 return (lang_output_section_statement_type *) NULL;
672 lang_output_section_statement_type *
673 lang_output_section_statement_lookup (name)
674 CONST char *CONST name;
676 lang_output_section_statement_type *lookup;
678 lookup = lang_output_section_find (name);
679 if (lookup == (lang_output_section_statement_type *) NULL)
682 lookup = (lang_output_section_statement_type *)
683 new_stat (lang_output_section_statement, stat_ptr);
684 lookup->region = (lang_memory_region_type *) NULL;
686 lookup->block_value = 1;
689 lookup->next = (lang_statement_union_type *) NULL;
690 lookup->bfd_section = (asection *) NULL;
691 lookup->processed = false;
692 lookup->sectype = normal_section;
693 lookup->addr_tree = (etree_type *) NULL;
694 lang_list_init (&lookup->children);
696 lookup->memspec = (CONST char *) NULL;
698 lookup->subsection_alignment = -1;
699 lookup->section_alignment = -1;
700 lookup->load_base = (union etree_union *) NULL;
701 lookup->phdrs = NULL;
703 lang_statement_append (&lang_output_section_statement,
704 (lang_statement_union_type *) lookup,
711 lang_map_flags (flag)
714 if (flag & SEC_ALLOC)
720 if (flag & SEC_READONLY)
733 lang_memory_region_type *m;
735 minfo (_("\nMemory Configuration\n\n"));
736 fprintf (config.map_file, "%-16s %-18s %-18s %s\n",
737 _("Name"), _("Origin"), _("Length"), _("Attributes"));
739 for (m = lang_memory_region_list;
740 m != (lang_memory_region_type *) NULL;
746 fprintf (config.map_file, "%-16s ", m->name);
748 sprintf_vma (buf, m->origin);
749 minfo ("0x%s ", buf);
757 minfo ("0x%V", m->length);
758 if (m->flags || m->not_flags)
766 lang_map_flags (m->flags);
772 lang_map_flags (m->not_flags);
779 fprintf (config.map_file, _("\nLinker script and memory map\n\n"));
784 /* Initialize an output section. */
788 lang_output_section_statement_type *s;
790 section_userdata_type *new;
792 if (s->bfd_section != NULL)
795 if (strcmp (s->name, DISCARD_SECTION_NAME) == 0)
796 einfo (_("%P%F: Illegal use of `%s' section"), DISCARD_SECTION_NAME);
798 new = ((section_userdata_type *)
799 stat_alloc (sizeof (section_userdata_type)));
801 s->bfd_section = bfd_get_section_by_name (output_bfd, s->name);
802 if (s->bfd_section == (asection *) NULL)
803 s->bfd_section = bfd_make_section (output_bfd, s->name);
804 if (s->bfd_section == (asection *) NULL)
806 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
807 output_bfd->xvec->name, s->name);
809 s->bfd_section->output_section = s->bfd_section;
811 /* We initialize an output sections output offset to minus its own */
812 /* vma to allow us to output a section through itself */
813 s->bfd_section->output_offset = 0;
814 get_userdata (s->bfd_section) = (PTR) new;
816 /* If there is a base address, make sure that any sections it might
817 mention are initialized. */
818 if (s->addr_tree != NULL)
819 exp_init_os (s->addr_tree);
822 /* Make sure that all output sections mentioned in an expression are
829 switch (exp->type.node_class)
832 exp_init_os (exp->assign.src);
836 exp_init_os (exp->binary.lhs);
837 exp_init_os (exp->binary.rhs);
841 exp_init_os (exp->trinary.cond);
842 exp_init_os (exp->trinary.lhs);
843 exp_init_os (exp->trinary.rhs);
847 exp_init_os (exp->unary.child);
851 switch (exp->type.node_code)
857 lang_output_section_statement_type *os;
859 os = lang_output_section_find (exp->name.name);
860 if (os != NULL && os->bfd_section == NULL)
871 /* Sections marked with the SEC_LINK_ONCE flag should only be linked
872 once into the output. This routine checks each section, and
873 arrange to discard it if a section of the same name has already
874 been linked. If the section has COMDAT information, then it uses
875 that to decide whether the section should be included. This code
876 assumes that all relevant sections have the SEC_LINK_ONCE flag set;
877 that is, it does not depend solely upon the section name.
878 section_already_linked is called via bfd_map_over_sections. */
880 /* This is the shape of the elements inside the already_linked hash
881 table. It maps a name onto a list of already_linked elements with
882 the same name. It's possible to get more than one element in a
883 list if the COMDAT sections have different names. */
885 struct already_linked_hash_entry
887 struct bfd_hash_entry root;
888 struct already_linked *entry;
891 struct already_linked
893 struct already_linked *next;
897 /* The hash table. */
899 static struct bfd_hash_table already_linked_table;
903 section_already_linked (abfd, sec, data)
908 lang_input_statement_type *entry = (lang_input_statement_type *) data;
911 struct already_linked *l;
912 struct already_linked_hash_entry *already_linked_list;
914 /* If we are only reading symbols from this object, then we want to
915 discard all sections. */
916 if (entry->just_syms_flag)
918 sec->output_section = bfd_abs_section_ptr;
919 sec->output_offset = sec->vma;
923 flags = bfd_get_section_flags (abfd, sec);
925 if ((flags & SEC_LINK_ONCE) == 0)
928 /* FIXME: When doing a relocateable link, we may have trouble
929 copying relocations in other sections that refer to local symbols
930 in the section being discarded. Those relocations will have to
931 be converted somehow; as of this writing I'm not sure that any of
932 the backends handle that correctly.
934 It is tempting to instead not discard link once sections when
935 doing a relocateable link (technically, they should be discarded
936 whenever we are building constructors). However, that fails,
937 because the linker winds up combining all the link once sections
938 into a single large link once section, which defeats the purpose
939 of having link once sections in the first place.
941 Also, not merging link once sections in a relocateable link
942 causes trouble for MIPS ELF, which relies in link once semantics
943 to handle the .reginfo section correctly. */
945 name = bfd_get_section_name (abfd, sec);
947 already_linked_list =
948 ((struct already_linked_hash_entry *)
949 bfd_hash_lookup (&already_linked_table, name, true, false));
951 for (l = already_linked_list->entry; l != NULL; l = l->next)
953 if (sec->comdat == NULL
954 || l->sec->comdat == NULL
955 || strcmp (sec->comdat->name, l->sec->comdat->name) == 0)
957 /* The section has already been linked. See if we should
959 switch (flags & SEC_LINK_DUPLICATES)
964 case SEC_LINK_DUPLICATES_DISCARD:
967 case SEC_LINK_DUPLICATES_ONE_ONLY:
968 if (sec->comdat == NULL)
969 einfo (_("%P: %B: warning: ignoring duplicate section `%s'\n"),
972 einfo (_("%P: %B: warning: ignoring duplicate `%s' section symbol `%s'\n"),
973 abfd, name, sec->comdat->name);
976 case SEC_LINK_DUPLICATES_SAME_CONTENTS:
977 /* FIXME: We should really dig out the contents of both
978 sections and memcmp them. The COFF/PE spec says that
979 the Microsoft linker does not implement this
980 correctly, so I'm not going to bother doing it
983 case SEC_LINK_DUPLICATES_SAME_SIZE:
984 if (bfd_section_size (abfd, sec)
985 != bfd_section_size (l->sec->owner, l->sec))
986 einfo (_("%P: %B: warning: duplicate section `%s' has different size\n"),
991 /* Set the output_section field so that wild_doit does not
992 create a lang_input_section structure for this section.
993 Since there might be a symbol in the section being
994 discarded, we must retain a pointer to the section which
995 we are really going to use. */
996 sec->output_section = bfd_abs_section_ptr;
997 if (sec->comdat != NULL)
998 sec->comdat->sec = l->sec;
1004 /* This is the first section with this name. Record it. Allocate
1005 the memory from the same obstack as the hash table is kept in. */
1007 l = ((struct already_linked *)
1008 bfd_hash_allocate (&already_linked_table, sizeof *l));
1011 l->next = already_linked_list->entry;
1012 already_linked_list->entry = l;
1015 /* Support routines for the hash table used by section_already_linked,
1016 initialize the table, fill in an entry and remove the table. */
1018 static struct bfd_hash_entry *
1019 already_linked_newfunc (entry, table, string)
1020 struct bfd_hash_entry *entry ATTRIBUTE_UNUSED;
1021 struct bfd_hash_table *table;
1022 const char *string ATTRIBUTE_UNUSED;
1024 struct already_linked_hash_entry *ret =
1025 bfd_hash_allocate (table, sizeof (struct already_linked_hash_entry));
1029 return (struct bfd_hash_entry *) ret;
1033 already_linked_table_init ()
1035 if (! bfd_hash_table_init_n (&already_linked_table,
1036 already_linked_newfunc,
1038 einfo (_("%P%F: Failed to create hash table\n"));
1042 already_linked_table_free ()
1044 bfd_hash_table_free (&already_linked_table);
1047 /* The wild routines.
1049 These expand statements like *(.text) and foo.o to a list of
1050 explicit actions, like foo.o(.text), bar.o(.text) and
1051 foo.o(.text, .data). */
1053 /* Return true if the PATTERN argument is a wildcard pattern.
1054 Although backslashes are treated specially if a pattern contains
1055 wildcards, we do not consider the mere presence of a backslash to
1056 be enough to cause the the pattern to be treated as a wildcard.
1057 That lets us handle DOS filenames more naturally. */
1061 const char *pattern;
1065 for (s = pattern; *s != '\0'; ++s)
1073 /* Add SECTION to the output section OUTPUT. Do this by creating a
1074 lang_input_section statement which is placed at PTR. FILE is the
1075 input file which holds SECTION. */
1078 wild_doit (ptr, section, output, file)
1079 lang_statement_list_type *ptr;
1081 lang_output_section_statement_type *output;
1082 lang_input_statement_type *file;
1087 flags = bfd_get_section_flags (section->owner, section);
1091 /* If we are doing a final link, discard sections marked with
1093 if (! link_info.relocateable
1094 && (flags & SEC_EXCLUDE) != 0)
1097 /* Discard input sections which are assigned to a section named
1098 DISCARD_SECTION_NAME. */
1099 if (strcmp (output->name, DISCARD_SECTION_NAME) == 0)
1102 /* Discard debugging sections if we are stripping debugging
1104 if ((link_info.strip == strip_debugger || link_info.strip == strip_all)
1105 && (flags & SEC_DEBUGGING) != 0)
1110 if (section->output_section == NULL)
1112 /* This prevents future calls from assigning this section. */
1113 section->output_section = bfd_abs_section_ptr;
1118 if (section->output_section == NULL)
1121 lang_input_section_type *new;
1124 if (output->bfd_section == NULL)
1132 /* Add a section reference to the list */
1133 new = new_stat (lang_input_section, ptr);
1135 new->section = section;
1137 section->output_section = output->bfd_section;
1139 flags = section->flags;
1141 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1142 to an output section, because we want to be able to include a
1143 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1144 section (I don't know why we want to do this, but we do).
1145 build_link_order in ldwrite.c handles this case by turning
1146 the embedded SEC_NEVER_LOAD section into a fill. */
1148 flags &= ~ SEC_NEVER_LOAD;
1150 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1151 already been processed. One reason to do this is that on pe
1152 format targets, .text$foo sections go into .text and it's odd
1153 to see .text with SEC_LINK_ONCE set. */
1155 if (! link_info.relocateable)
1156 flags &= ~ (SEC_LINK_ONCE | SEC_LINK_DUPLICATES);
1158 /* If this is not the first input section, and the SEC_READONLY
1159 flag is not currently set, then don't set it just because the
1160 input section has it set. */
1162 if (! first && (section->output_section->flags & SEC_READONLY) == 0)
1163 flags &= ~ SEC_READONLY;
1165 section->output_section->flags |= flags;
1167 /* If SEC_READONLY is not set in the input section, then clear
1168 it from the output section. */
1169 if ((section->flags & SEC_READONLY) == 0)
1170 section->output_section->flags &= ~SEC_READONLY;
1172 switch (output->sectype)
1174 case normal_section:
1179 case overlay_section:
1180 output->bfd_section->flags &= ~SEC_ALLOC;
1182 case noload_section:
1183 output->bfd_section->flags &= ~SEC_LOAD;
1184 output->bfd_section->flags |= SEC_NEVER_LOAD;
1188 /* Copy over SEC_SMALL_DATA. */
1189 if (section->flags & SEC_SMALL_DATA)
1190 section->output_section->flags |= SEC_SMALL_DATA;
1192 if (section->alignment_power > output->bfd_section->alignment_power)
1193 output->bfd_section->alignment_power = section->alignment_power;
1195 /* If supplied an aligment, then force it. */
1196 if (output->section_alignment != -1)
1197 output->bfd_section->alignment_power = output->section_alignment;
1201 /* Handle wildcard sorting. This returns the lang_input_section which
1202 should follow the one we are going to create for SECTION and FILE,
1203 based on the sorting requirements of WILD. It returns NULL if the
1204 new section should just go at the end of the current list. */
1206 static lang_statement_union_type *
1207 wild_sort (wild, file, section)
1208 lang_wild_statement_type *wild;
1209 lang_input_statement_type *file;
1212 const char *section_name;
1213 lang_statement_union_type *l;
1215 if (! wild->filenames_sorted && ! wild->sections_sorted)
1218 section_name = bfd_get_section_name (file->the_bfd, section);
1219 for (l = wild->children.head; l != NULL; l = l->next)
1221 lang_input_section_type *ls;
1223 if (l->header.type != lang_input_section_enum)
1225 ls = &l->input_section;
1227 /* Sorting by filename takes precedence over sorting by section
1230 if (wild->filenames_sorted)
1232 const char *fn, *ln;
1236 /* The PE support for the .idata section as generated by
1237 dlltool assumes that files will be sorted by the name of
1238 the archive and then the name of the file within the
1241 if (file->the_bfd != NULL
1242 && bfd_my_archive (file->the_bfd) != NULL)
1244 fn = bfd_get_filename (bfd_my_archive (file->the_bfd));
1249 fn = file->filename;
1253 if (ls->ifile->the_bfd != NULL
1254 && bfd_my_archive (ls->ifile->the_bfd) != NULL)
1256 ln = bfd_get_filename (bfd_my_archive (ls->ifile->the_bfd));
1261 ln = ls->ifile->filename;
1265 i = strcmp (fn, ln);
1274 fn = file->filename;
1276 ln = ls->ifile->filename;
1278 i = strcmp (fn, ln);
1286 /* Here either the files are not sorted by name, or we are
1287 looking at the sections for this file. */
1289 if (wild->sections_sorted)
1291 if (strcmp (section_name,
1292 bfd_get_section_name (ls->ifile->the_bfd,
1302 /* Expand a wild statement for a particular FILE. SECTION may be
1303 NULL, in which case it is a wild card. */
1306 output_section_callback (ptr, section, file, output)
1307 lang_wild_statement_type *ptr;
1309 lang_input_statement_type *file;
1312 lang_statement_union_type *before;
1314 /* If the wild pattern was marked KEEP, the member sections
1315 should be as well. */
1316 if (ptr->keep_sections)
1317 section->flags |= SEC_KEEP;
1319 before = wild_sort (ptr, file, section);
1321 /* Here BEFORE points to the lang_input_section which
1322 should follow the one we are about to add. If BEFORE
1323 is NULL, then the section should just go at the end
1324 of the current list. */
1327 wild_doit (&ptr->children, section,
1328 (lang_output_section_statement_type *) output,
1332 lang_statement_list_type list;
1333 lang_statement_union_type **pp;
1335 lang_list_init (&list);
1336 wild_doit (&list, section,
1337 (lang_output_section_statement_type *) output,
1340 /* If we are discarding the section, LIST.HEAD will
1342 if (list.head != NULL)
1344 ASSERT (list.head->next == NULL);
1346 for (pp = &ptr->children.head;
1349 ASSERT (*pp != NULL);
1351 list.head->next = *pp;
1357 /* This is passed a file name which must have been seen already and
1358 added to the statement tree. We will see if it has been opened
1359 already and had its symbols read. If not then we'll read it. */
1361 static lang_input_statement_type *
1365 lang_input_statement_type *search;
1367 for (search = (lang_input_statement_type *) input_file_chain.head;
1368 search != (lang_input_statement_type *) NULL;
1369 search = (lang_input_statement_type *) search->next_real_file)
1371 if (search->filename == (char *) NULL && name == (char *) NULL)
1373 if (search->filename != (char *) NULL
1374 && name != (char *) NULL
1375 && strcmp (search->filename, name) == 0)
1379 if (search == (lang_input_statement_type *) NULL)
1380 search = new_afile (name, lang_input_file_is_file_enum, default_target,
1383 /* If we have already added this file, or this file is not real
1384 (FIXME: can that ever actually happen?) or the name is NULL
1385 (FIXME: can that ever actually happen?) don't add this file. */
1388 || search->filename == (const char *) NULL)
1391 load_symbols (search, (lang_statement_list_type *) NULL);
1396 /* Get the symbols for an input file. */
1399 load_symbols (entry, place)
1400 lang_input_statement_type *entry;
1401 lang_statement_list_type *place;
1408 ldfile_open_file (entry);
1410 if (! bfd_check_format (entry->the_bfd, bfd_archive)
1411 && ! bfd_check_format_matches (entry->the_bfd, bfd_object, &matching))
1414 lang_statement_list_type *hold;
1416 err = bfd_get_error ();
1417 if (err == bfd_error_file_ambiguously_recognized)
1421 einfo (_("%B: file not recognized: %E\n"), entry->the_bfd);
1422 einfo (_("%B: matching formats:"), entry->the_bfd);
1423 for (p = matching; *p != NULL; p++)
1427 else if (err != bfd_error_file_not_recognized
1429 einfo (_("%F%B: file not recognized: %E\n"), entry->the_bfd);
1431 bfd_close (entry->the_bfd);
1432 entry->the_bfd = NULL;
1434 /* See if the emulation has some special knowledge. */
1436 if (ldemul_unrecognized_file (entry))
1439 /* Try to interpret the file as a linker script. */
1441 ldfile_open_command_file (entry->filename);
1446 ldfile_assumed_script = true;
1447 parser_input = input_script;
1449 ldfile_assumed_script = false;
1456 if (ldemul_recognized_file (entry))
1459 /* We don't call ldlang_add_file for an archive. Instead, the
1460 add_symbols entry point will call ldlang_add_file, via the
1461 add_archive_element callback, for each element of the archive
1463 switch (bfd_get_format (entry->the_bfd))
1469 ldlang_add_file (entry);
1470 if (trace_files || trace_file_tries)
1471 info_msg ("%I\n", entry);
1475 if (entry->whole_archive)
1477 bfd *member = bfd_openr_next_archived_file (entry->the_bfd,
1479 while (member != NULL)
1481 if (! bfd_check_format (member, bfd_object))
1482 einfo (_("%F%B: object %B in archive is not object\n"),
1483 entry->the_bfd, member);
1484 if (! ((*link_info.callbacks->add_archive_element)
1485 (&link_info, member, "--whole-archive")))
1487 if (! bfd_link_add_symbols (member, &link_info))
1488 einfo (_("%F%B: could not read symbols: %E\n"), member);
1489 member = bfd_openr_next_archived_file (entry->the_bfd,
1493 entry->loaded = true;
1499 if (! bfd_link_add_symbols (entry->the_bfd, &link_info))
1500 einfo (_("%F%B: could not read symbols: %E\n"), entry->the_bfd);
1502 entry->loaded = true;
1507 /* Handle a wild statement. SECTION or FILE or both may be NULL,
1508 indicating that it is a wildcard. Separate lang_input_section
1509 statements are created for each part of the expansion; they are
1510 added after the wild statement S. OUTPUT is the output section. */
1513 wild (s, section, file, target, output)
1514 lang_wild_statement_type *s;
1515 const char *section;
1517 const char *target ATTRIBUTE_UNUSED;
1518 lang_output_section_statement_type *output;
1520 walk_wild (s, section, file, output_section_callback, (void *) output);
1522 if (section != (char *) NULL
1523 && strcmp (section, "COMMON") == 0
1524 && default_common_section == NULL)
1526 /* Remember the section that common is going to in case we later
1527 get something which doesn't know where to put it. */
1528 default_common_section = output;
1532 /* Return true iff target is the sought target. */
1534 get_target (target, data)
1535 const bfd_target * target;
1538 const char * sought = (const char *) data;
1540 return strcmp (target->name, sought) == 0;
1543 /* Like strcpy() but convert to lower case as well. */
1551 while ((c = * src ++) != 0)
1553 if (isupper ((unsigned char) c))
1562 /* Remove the first occurance of needle (if any) in haystack
1565 strcut (haystack, needle)
1569 haystack = strstr (haystack, needle);
1575 for (src = haystack + strlen (needle); * src;)
1576 * haystack ++ = * src ++;
1582 /* Compare two target format name strings.
1583 Return a value indicating how "similar" they are. */
1585 name_compare (first, second)
1593 copy1 = xmalloc (strlen (first) + 1);
1594 copy2 = xmalloc (strlen (second) + 1);
1596 /* Convert the names to lower case. */
1597 stricpy (copy1, first);
1598 stricpy (copy2, second);
1600 /* Remove and endian strings from the name. */
1601 strcut (copy1, "big");
1602 strcut (copy1, "little");
1603 strcut (copy2, "big");
1604 strcut (copy2, "little");
1606 /* Return a value based on how many characters match,
1607 starting from the beginning. If both strings are
1608 the same then return 10 * their length. */
1609 for (result = 0; copy1 [result] == copy2 [result]; result ++)
1610 if (copy1 [result] == 0)
1622 /* Set by closest_target_match() below. */
1623 static const bfd_target * winner;
1625 /* Scan all the valid bfd targets looking for one that has the endianness
1626 requirement that was specified on the command line, and is the nearest
1627 match to the original output target. */
1629 closest_target_match (target, data)
1630 const bfd_target * target;
1633 const bfd_target * original = (const bfd_target *) data;
1635 if (command_line.endian == ENDIAN_BIG && target->byteorder != BFD_ENDIAN_BIG)
1638 if (command_line.endian == ENDIAN_LITTLE && target->byteorder != BFD_ENDIAN_LITTLE)
1641 /* Must be the same flavour. */
1642 if (target->flavour != original->flavour)
1645 /* If we have not found a potential winner yet, then record this one. */
1652 /* Oh dear, we now have two potential candidates for a successful match.
1653 Compare their names and choose the better one. */
1654 if (name_compare (target->name, original->name) > name_compare (winner->name, original->name))
1657 /* Keep on searching until wqe have checked them all. */
1661 /* Return the BFD target format of the first input file. */
1663 get_first_input_target ()
1665 char * target = NULL;
1667 LANG_FOR_EACH_INPUT_STATEMENT (s)
1669 if (s->header.type == lang_input_statement_enum
1672 ldfile_open_file (s);
1674 if (s->the_bfd != NULL
1675 && bfd_check_format (s->the_bfd, bfd_object))
1677 target = bfd_get_target (s->the_bfd);
1688 /* Open the output file. */
1696 /* Has the user told us which output format to use ? */
1697 if (output_target == (char *) NULL)
1699 /* No - has the current target been set to something other than the default ? */
1700 if (current_target != default_target)
1701 output_target = current_target;
1703 /* No - can we determine the format of the first input file ? */
1706 output_target = get_first_input_target ();
1708 /* Failed - use the default output target. */
1709 if (output_target == NULL)
1710 output_target = default_target;
1714 /* Has the user requested a particular endianness on the command line ? */
1715 if (command_line.endian != ENDIAN_UNSET)
1717 const bfd_target * target;
1718 enum bfd_endian desired_endian;
1720 /* Get the chosen target. */
1721 target = bfd_search_for_target (get_target, (void *) output_target);
1723 if (command_line.endian == ENDIAN_BIG)
1724 desired_endian = BFD_ENDIAN_BIG;
1726 desired_endian = BFD_ENDIAN_LITTLE;
1728 /* See if the target has the wrong endianness. This should not happen
1729 if the linker script has provided big and little endian alternatives,
1730 but some scrips don't do this. */
1731 if (target->byteorder != desired_endian)
1733 /* If it does, then see if the target provides
1734 an alternative with the correct endianness. */
1735 if (target->alternative_target != NULL
1736 && (target->alternative_target->byteorder == desired_endian))
1737 output_target = target->alternative_target->name;
1740 /* Try to find a target as similar as possible to the default
1741 target, but which has the desired endian characteristic. */
1742 (void) bfd_search_for_target (closest_target_match, (void *) target);
1744 /* Oh dear - we could not find any targets that satisfy our requirements. */
1746 einfo (_("%P: warning: could not find any targets that match endianness requirement\n"));
1748 output_target = winner->name;
1753 output = bfd_openw (name, output_target);
1755 if (output == (bfd *) NULL)
1757 if (bfd_get_error () == bfd_error_invalid_target)
1758 einfo (_("%P%F: target %s not found\n"), output_target);
1760 einfo (_("%P%F: cannot open output file %s: %E\n"), name);
1763 delete_output_file_on_failure = true;
1765 /* output->flags |= D_PAGED;*/
1767 if (! bfd_set_format (output, bfd_object))
1768 einfo (_("%P%F:%s: can not make object file: %E\n"), name);
1769 if (! bfd_set_arch_mach (output,
1770 ldfile_output_architecture,
1771 ldfile_output_machine))
1772 einfo (_("%P%F:%s: can not set architecture: %E\n"), name);
1774 link_info.hash = bfd_link_hash_table_create (output);
1775 if (link_info.hash == (struct bfd_link_hash_table *) NULL)
1776 einfo (_("%P%F: can not create link hash table: %E\n"));
1778 bfd_set_gp_size (output, g_switch_value);
1783 ldlang_open_output (statement)
1784 lang_statement_union_type * statement;
1786 switch (statement->header.type)
1788 case lang_output_statement_enum:
1789 ASSERT (output_bfd == (bfd *) NULL);
1790 output_bfd = open_output (statement->output_statement.name);
1791 ldemul_set_output_arch ();
1792 if (config.magic_demand_paged && !link_info.relocateable)
1793 output_bfd->flags |= D_PAGED;
1795 output_bfd->flags &= ~D_PAGED;
1796 if (config.text_read_only)
1797 output_bfd->flags |= WP_TEXT;
1799 output_bfd->flags &= ~WP_TEXT;
1800 if (link_info.traditional_format)
1801 output_bfd->flags |= BFD_TRADITIONAL_FORMAT;
1803 output_bfd->flags &= ~BFD_TRADITIONAL_FORMAT;
1806 case lang_target_statement_enum:
1807 current_target = statement->target_statement.target;
1814 /* Open all the input files. */
1817 open_input_bfds (s, force)
1818 lang_statement_union_type *s;
1821 for (; s != (lang_statement_union_type *) NULL; s = s->next)
1823 switch (s->header.type)
1825 case lang_constructors_statement_enum:
1826 open_input_bfds (constructor_list.head, force);
1828 case lang_output_section_statement_enum:
1829 open_input_bfds (s->output_section_statement.children.head, force);
1831 case lang_wild_statement_enum:
1832 /* Maybe we should load the file's symbols */
1833 if (s->wild_statement.filename
1834 && ! wildcardp (s->wild_statement.filename))
1835 (void) lookup_name (s->wild_statement.filename);
1836 open_input_bfds (s->wild_statement.children.head, force);
1838 case lang_group_statement_enum:
1840 struct bfd_link_hash_entry *undefs;
1842 /* We must continually search the entries in the group
1843 until no new symbols are added to the list of undefined
1848 undefs = link_info.hash->undefs_tail;
1849 open_input_bfds (s->group_statement.children.head, true);
1851 while (undefs != link_info.hash->undefs_tail);
1854 case lang_target_statement_enum:
1855 current_target = s->target_statement.target;
1857 case lang_input_statement_enum:
1858 if (s->input_statement.real)
1860 lang_statement_list_type add;
1862 s->input_statement.target = current_target;
1864 /* If we are being called from within a group, and this
1865 is an archive which has already been searched, then
1866 force it to be researched. */
1868 && s->input_statement.loaded
1869 && bfd_check_format (s->input_statement.the_bfd,
1871 s->input_statement.loaded = false;
1873 lang_list_init (&add);
1875 load_symbols (&s->input_statement, &add);
1877 if (add.head != NULL)
1879 *add.tail = s->next;
1890 /* If there are [COMMONS] statements, put a wild one into the bss section */
1893 lang_reasonable_defaults ()
1896 lang_output_section_statement_lookup (".text");
1897 lang_output_section_statement_lookup (".data");
1899 default_common_section =
1900 lang_output_section_statement_lookup (".bss");
1903 if (placed_commons == false)
1905 lang_wild_statement_type *new =
1906 new_stat (lang_wild_statement,
1907 &default_common_section->children);
1909 new->section_name = "COMMON";
1910 new->filename = (char *) NULL;
1911 lang_list_init (&new->children);
1918 Add the supplied name to the symbol table as an undefined reference.
1919 Remove items from the chain as we open input bfds
1921 typedef struct ldlang_undef_chain_list
1923 struct ldlang_undef_chain_list *next;
1925 } ldlang_undef_chain_list_type;
1927 static ldlang_undef_chain_list_type *ldlang_undef_chain_list_head;
1930 ldlang_add_undef (name)
1931 CONST char *CONST name;
1933 ldlang_undef_chain_list_type *new =
1934 ((ldlang_undef_chain_list_type *)
1935 stat_alloc (sizeof (ldlang_undef_chain_list_type)));
1937 new->next = ldlang_undef_chain_list_head;
1938 ldlang_undef_chain_list_head = new;
1940 new->name = buystring (name);
1943 /* Run through the list of undefineds created above and place them
1944 into the linker hash table as undefined symbols belonging to the
1948 lang_place_undefineds ()
1950 ldlang_undef_chain_list_type *ptr;
1952 for (ptr = ldlang_undef_chain_list_head;
1953 ptr != (ldlang_undef_chain_list_type *) NULL;
1956 struct bfd_link_hash_entry *h;
1958 h = bfd_link_hash_lookup (link_info.hash, ptr->name, true, false, true);
1959 if (h == (struct bfd_link_hash_entry *) NULL)
1960 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
1961 if (h->type == bfd_link_hash_new)
1963 h->type = bfd_link_hash_undefined;
1964 h->u.undef.abfd = NULL;
1965 bfd_link_add_undef (link_info.hash, h);
1970 /* Open input files and attatch to output sections */
1972 map_input_to_output_sections (s, target, output_section_statement)
1973 lang_statement_union_type * s;
1975 lang_output_section_statement_type * output_section_statement;
1977 for (; s != (lang_statement_union_type *) NULL; s = s->next)
1979 switch (s->header.type)
1983 case lang_wild_statement_enum:
1984 wild (&s->wild_statement, s->wild_statement.section_name,
1985 s->wild_statement.filename, target,
1986 output_section_statement);
1989 case lang_constructors_statement_enum:
1990 map_input_to_output_sections (constructor_list.head,
1992 output_section_statement);
1994 case lang_output_section_statement_enum:
1995 map_input_to_output_sections (s->output_section_statement.children.head,
1997 &s->output_section_statement);
1999 case lang_output_statement_enum:
2001 case lang_target_statement_enum:
2002 target = s->target_statement.target;
2004 case lang_group_statement_enum:
2005 map_input_to_output_sections (s->group_statement.children.head,
2007 output_section_statement);
2009 case lang_fill_statement_enum:
2010 case lang_input_section_enum:
2011 case lang_object_symbols_statement_enum:
2012 case lang_data_statement_enum:
2013 case lang_reloc_statement_enum:
2014 case lang_padding_statement_enum:
2015 case lang_input_statement_enum:
2016 if (output_section_statement != NULL
2017 && output_section_statement->bfd_section == NULL)
2018 init_os (output_section_statement);
2020 case lang_assignment_statement_enum:
2021 if (output_section_statement != NULL
2022 && output_section_statement->bfd_section == NULL)
2023 init_os (output_section_statement);
2025 /* Make sure that any sections mentioned in the assignment
2027 exp_init_os (s->assignment_statement.exp);
2029 case lang_afile_asection_pair_statement_enum:
2032 case lang_address_statement_enum:
2033 /* Mark the specified section with the supplied address */
2035 lang_output_section_statement_type *os =
2036 lang_output_section_statement_lookup
2037 (s->address_statement.section_name);
2039 if (os->bfd_section == NULL)
2041 os->addr_tree = s->address_statement.address;
2049 print_output_section_statement (output_section_statement)
2050 lang_output_section_statement_type * output_section_statement;
2052 asection *section = output_section_statement->bfd_section;
2055 if (output_section_statement != abs_output_section)
2057 minfo ("\n%s", output_section_statement->name);
2059 if (section != NULL)
2061 print_dot = section->vma;
2063 len = strlen (output_section_statement->name);
2064 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2069 while (len < SECTION_NAME_MAP_LENGTH)
2075 minfo ("0x%V %W", section->vma, section->_raw_size);
2077 if (output_section_statement->load_base != NULL)
2081 addr = exp_get_abs_int (output_section_statement->load_base, 0,
2082 "load base", lang_final_phase_enum);
2083 minfo (_(" load address 0x%V"), addr);
2090 print_statement_list (output_section_statement->children.head,
2091 output_section_statement);
2095 print_assignment (assignment, output_section)
2096 lang_assignment_statement_type * assignment;
2097 lang_output_section_statement_type * output_section;
2100 etree_value_type result;
2102 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2105 result = exp_fold_tree (assignment->exp->assign.src, output_section,
2106 lang_final_phase_enum, print_dot, &print_dot);
2108 minfo ("0x%V", result.value + result.section->bfd_section->vma);
2119 exp_print_tree (assignment->exp);
2125 print_input_statement (statm)
2126 lang_input_statement_type * statm;
2128 if (statm->filename != (char *) NULL)
2130 fprintf (config.map_file, "LOAD %s\n", statm->filename);
2134 /* Print all symbols defined in a particular section. This is called
2135 via bfd_link_hash_traverse. */
2138 print_one_symbol (hash_entry, ptr)
2139 struct bfd_link_hash_entry *hash_entry;
2142 asection *sec = (asection *) ptr;
2144 if ((hash_entry->type == bfd_link_hash_defined
2145 || hash_entry->type == bfd_link_hash_defweak)
2146 && sec == hash_entry->u.def.section)
2150 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2153 (hash_entry->u.def.value
2154 + hash_entry->u.def.section->output_offset
2155 + hash_entry->u.def.section->output_section->vma));
2157 minfo (" %T\n", hash_entry->root.string);
2163 /* Print information about an input section to the map file. */
2166 print_input_section (in)
2167 lang_input_section_type * in;
2169 asection *i = in->section;
2170 bfd_size_type size = i->_cooked_size != 0 ? i->_cooked_size : i->_raw_size;
2176 minfo ("%s", i->name);
2178 if (i->output_section != NULL)
2182 len = 1 + strlen (i->name);
2183 if (len >= SECTION_NAME_MAP_LENGTH - 1)
2188 while (len < SECTION_NAME_MAP_LENGTH)
2194 minfo ("0x%V %W %B\n",
2195 i->output_section->vma + i->output_offset, size,
2198 if (i->_cooked_size != 0 && i->_cooked_size != i->_raw_size)
2200 len = SECTION_NAME_MAP_LENGTH + 3;
2212 minfo (_("%W (size before relaxing)\n"), i->_raw_size);
2215 bfd_link_hash_traverse (link_info.hash, print_one_symbol, (PTR) i);
2217 print_dot = i->output_section->vma + i->output_offset + size;
2223 print_fill_statement (fill)
2224 lang_fill_statement_type * fill;
2226 fprintf (config.map_file, " FILL mask 0x%x\n", fill->fill);
2230 print_data_statement (data)
2231 lang_data_statement_type * data;
2238 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2241 addr = data->output_vma;
2242 if (data->output_section != NULL)
2243 addr += data->output_section->vma;
2271 minfo ("0x%V %W %s 0x%v", addr, size, name, data->value);
2273 if (data->exp->type.node_class != etree_value)
2276 exp_print_tree (data->exp);
2281 print_dot = addr + size;
2284 /* Print an address statement. These are generated by options like
2288 print_address_statement (address)
2289 lang_address_statement_type *address;
2291 minfo (_("Address of section %s set to "), address->section_name);
2292 exp_print_tree (address->address);
2296 /* Print a reloc statement. */
2299 print_reloc_statement (reloc)
2300 lang_reloc_statement_type *reloc;
2306 for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
2309 addr = reloc->output_vma;
2310 if (reloc->output_section != NULL)
2311 addr += reloc->output_section->vma;
2313 size = bfd_get_reloc_size (reloc->howto);
2315 minfo ("0x%V %W RELOC %s ", addr, size, reloc->howto->name);
2317 if (reloc->name != NULL)
2318 minfo ("%s+", reloc->name);
2320 minfo ("%s+", reloc->section->name);
2322 exp_print_tree (reloc->addend_exp);
2326 print_dot = addr + size;
2330 print_padding_statement (s)
2331 lang_padding_statement_type *s;
2338 len = sizeof " *fill*" - 1;
2339 while (len < SECTION_NAME_MAP_LENGTH)
2345 addr = s->output_offset;
2346 if (s->output_section != NULL)
2347 addr += s->output_section->vma;
2348 minfo ("0x%V %W", addr, s->size);
2351 minfo (" %u", s->fill);
2355 print_dot = addr + s->size;
2359 print_wild_statement (w, os)
2360 lang_wild_statement_type * w;
2361 lang_output_section_statement_type * os;
2365 if (w->filenames_sorted)
2367 if (w->exclude_filename_list != NULL)
2370 minfo ("EXCLUDE_FILE ( %s", w->exclude_filename_list->name);
2371 for (tmp=w->exclude_filename_list->next; tmp; tmp = tmp->next)
2372 minfo (", %s", tmp->name);
2375 if (w->filename != NULL)
2376 minfo ("%s", w->filename);
2379 if (w->filenames_sorted)
2383 if (w->sections_sorted)
2385 if (w->section_name != NULL)
2386 minfo ("%s", w->section_name);
2389 if (w->sections_sorted)
2395 print_statement_list (w->children.head, os);
2398 /* Print a group statement. */
2402 lang_group_statement_type *s;
2403 lang_output_section_statement_type *os;
2405 fprintf (config.map_file, "START GROUP\n");
2406 print_statement_list (s->children.head, os);
2407 fprintf (config.map_file, "END GROUP\n");
2410 /* Print the list of statements in S.
2411 This can be called for any statement type. */
2414 print_statement_list (s, os)
2415 lang_statement_union_type *s;
2416 lang_output_section_statement_type *os;
2420 print_statement (s, os);
2425 /* Print the first statement in statement list S.
2426 This can be called for any statement type. */
2429 print_statement (s, os)
2430 lang_statement_union_type *s;
2431 lang_output_section_statement_type *os;
2433 switch (s->header.type)
2436 fprintf (config.map_file, _("Fail with %d\n"), s->header.type);
2439 case lang_constructors_statement_enum:
2440 if (constructor_list.head != NULL)
2442 if (constructors_sorted)
2443 minfo (" SORT (CONSTRUCTORS)\n");
2445 minfo (" CONSTRUCTORS\n");
2446 print_statement_list (constructor_list.head, os);
2449 case lang_wild_statement_enum:
2450 print_wild_statement (&s->wild_statement, os);
2452 case lang_address_statement_enum:
2453 print_address_statement (&s->address_statement);
2455 case lang_object_symbols_statement_enum:
2456 minfo (" CREATE_OBJECT_SYMBOLS\n");
2458 case lang_fill_statement_enum:
2459 print_fill_statement (&s->fill_statement);
2461 case lang_data_statement_enum:
2462 print_data_statement (&s->data_statement);
2464 case lang_reloc_statement_enum:
2465 print_reloc_statement (&s->reloc_statement);
2467 case lang_input_section_enum:
2468 print_input_section (&s->input_section);
2470 case lang_padding_statement_enum:
2471 print_padding_statement (&s->padding_statement);
2473 case lang_output_section_statement_enum:
2474 print_output_section_statement (&s->output_section_statement);
2476 case lang_assignment_statement_enum:
2477 print_assignment (&s->assignment_statement, os);
2479 case lang_target_statement_enum:
2480 fprintf (config.map_file, "TARGET(%s)\n", s->target_statement.target);
2482 case lang_output_statement_enum:
2483 minfo ("OUTPUT(%s", s->output_statement.name);
2484 if (output_target != NULL)
2485 minfo (" %s", output_target);
2488 case lang_input_statement_enum:
2489 print_input_statement (&s->input_statement);
2491 case lang_group_statement_enum:
2492 print_group (&s->group_statement, os);
2494 case lang_afile_asection_pair_statement_enum:
2503 print_statement_list (statement_list.head, abs_output_section);
2506 /* Print the first N statements in statement list S to STDERR.
2507 If N == 0, nothing is printed.
2508 If N < 0, the entire list is printed.
2509 Intended to be called from GDB. */
2512 dprint_statement (s, n)
2513 lang_statement_union_type * s;
2516 FILE *map_save = config.map_file;
2518 config.map_file = stderr;
2521 print_statement_list (s, abs_output_section);
2524 while (s && --n >= 0)
2526 print_statement (s, abs_output_section);
2531 config.map_file = map_save;
2535 insert_pad (this_ptr, fill, power, output_section_statement, dot)
2536 lang_statement_union_type ** this_ptr;
2539 asection * output_section_statement;
2542 /* Align this section first to the
2543 input sections requirement, then
2544 to the output section's requirement.
2545 If this alignment is > than any seen before,
2546 then record it too. Perform the alignment by
2547 inserting a magic 'padding' statement.
2550 unsigned int alignment_needed = align_power (dot, power) - dot;
2552 if (alignment_needed != 0)
2554 lang_statement_union_type *new =
2555 ((lang_statement_union_type *)
2556 stat_alloc (sizeof (lang_padding_statement_type)));
2558 /* Link into existing chain */
2559 new->header.next = *this_ptr;
2561 new->header.type = lang_padding_statement_enum;
2562 new->padding_statement.output_section = output_section_statement;
2563 new->padding_statement.output_offset =
2564 dot - output_section_statement->vma;
2565 new->padding_statement.fill = fill;
2566 new->padding_statement.size = alignment_needed;
2570 /* Remember the most restrictive alignment */
2571 if (power > output_section_statement->alignment_power)
2573 output_section_statement->alignment_power = power;
2575 output_section_statement->_raw_size += alignment_needed;
2576 return alignment_needed + dot;
2580 /* Work out how much this section will move the dot point */
2582 size_input_section (this_ptr, output_section_statement, fill, dot, relax)
2583 lang_statement_union_type ** this_ptr;
2584 lang_output_section_statement_type * output_section_statement;
2587 boolean relax ATTRIBUTE_UNUSED;
2589 lang_input_section_type *is = &((*this_ptr)->input_section);
2590 asection *i = is->section;
2592 if (is->ifile->just_syms_flag == false)
2594 if (output_section_statement->subsection_alignment != -1)
2595 i->alignment_power =
2596 output_section_statement->subsection_alignment;
2598 dot = insert_pad (this_ptr, fill, i->alignment_power,
2599 output_section_statement->bfd_section, dot);
2601 /* Remember where in the output section this input section goes */
2603 i->output_offset = dot - output_section_statement->bfd_section->vma;
2605 /* Mark how big the output section must be to contain this now
2607 if (i->_cooked_size != 0)
2608 dot += i->_cooked_size;
2610 dot += i->_raw_size;
2611 output_section_statement->bfd_section->_raw_size = dot - output_section_statement->bfd_section->vma;
2615 i->output_offset = i->vma - output_section_statement->bfd_section->vma;
2621 #define IGNORE_SECTION(bfd, s) \
2622 (((bfd_get_section_flags (bfd, s) & (SEC_ALLOC | SEC_LOAD)) != (SEC_ALLOC | SEC_LOAD)) \
2623 || bfd_section_size (bfd, s) == 0)
2625 /* Check to see if any allocated sections overlap with other allocated
2626 sections. This can happen when the linker script specifically specifies
2627 the output section addresses of the two sections. */
2629 lang_check_section_addresses ()
2633 /* Scan all sections in the output list. */
2634 for (s = output_bfd->sections; s != NULL; s = s->next)
2638 /* Ignore sections which are not loaded or which have no contents. */
2639 if (IGNORE_SECTION (output_bfd, s))
2642 /* Once we reach section 's' stop our seach. This prevents two
2643 warning messages from being produced, one for 'section A overlaps
2644 section B' and one for 'section B overlaps section A'. */
2645 for (os = output_bfd->sections; os != s; os = os->next)
2652 /* Only consider loadable sections with real contents. */
2653 if (IGNORE_SECTION (output_bfd, os))
2656 /* We must check the sections' LMA addresses not their
2657 VMA addresses because overlay sections can have
2658 overlapping VMAs but they must have distinct LMAs. */
2659 s_start = bfd_section_lma (output_bfd, s);
2660 os_start = bfd_section_lma (output_bfd, os);
2661 s_end = s_start + bfd_section_size (output_bfd, s) - 1;
2662 os_end = os_start + bfd_section_size (output_bfd, os) - 1;
2664 /* Look for an overlap. */
2665 if ((s_end < os_start) || (s_start > os_end))
2669 _("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
2670 s->name, s_start, s_end, os->name, os_start, os_end);
2672 /* Once we have found one overlap for this section,
2673 stop looking for others. */
2679 /* This variable indicates whether bfd_relax_section should be called
2682 static boolean relax_again;
2684 /* Set the sizes for all the output sections. */
2687 lang_size_sections (s, output_section_statement, prev, fill, dot, relax)
2688 lang_statement_union_type * s;
2689 lang_output_section_statement_type * output_section_statement;
2690 lang_statement_union_type ** prev;
2695 /* Size up the sections from their constituent parts. */
2696 for (; s != (lang_statement_union_type *) NULL; s = s->next)
2698 switch (s->header.type)
2700 case lang_output_section_statement_enum:
2703 lang_output_section_statement_type *os = &s->output_section_statement;
2705 if (os->bfd_section == NULL)
2706 /* This section was never actually created. */
2709 /* If this is a COFF shared library section, use the size and
2710 address from the input section. FIXME: This is COFF
2711 specific; it would be cleaner if there were some other way
2712 to do this, but nothing simple comes to mind. */
2713 if ((os->bfd_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
2717 if (os->children.head == NULL
2718 || os->children.head->next != NULL
2719 || os->children.head->header.type != lang_input_section_enum)
2720 einfo (_("%P%X: Internal error on COFF shared library section %s\n"),
2723 input = os->children.head->input_section.section;
2724 bfd_set_section_vma (os->bfd_section->owner,
2726 bfd_section_vma (input->owner, input));
2727 os->bfd_section->_raw_size = input->_raw_size;
2731 if (bfd_is_abs_section (os->bfd_section))
2733 /* No matter what happens, an abs section starts at zero. */
2734 ASSERT (os->bfd_section->vma == 0);
2738 if (os->addr_tree == (etree_type *) NULL)
2740 /* No address specified for this section, get one
2741 from the region specification. */
2742 if (os->region == (lang_memory_region_type *) NULL
2743 || (((bfd_get_section_flags (output_bfd, os->bfd_section)
2744 & (SEC_ALLOC | SEC_LOAD)) != 0)
2745 && os->region->name[0] == '*'
2746 && strcmp (os->region->name, "*default*") == 0))
2748 os->region = lang_memory_default (os->bfd_section);
2751 /* If a loadable section is using the default memory
2752 region, and some non default memory regions were
2753 defined, issue a warning. */
2754 if ((bfd_get_section_flags (output_bfd, os->bfd_section)
2755 & (SEC_ALLOC | SEC_LOAD)) != 0
2756 && ! link_info.relocateable
2757 && strcmp (os->region->name, "*default*") == 0
2758 && lang_memory_region_list != NULL
2759 && (strcmp (lang_memory_region_list->name, "*default*") != 0
2760 || lang_memory_region_list->next != NULL))
2761 einfo (_("%P: warning: no memory region specified for section `%s'\n"),
2762 bfd_get_section_name (output_bfd, os->bfd_section));
2764 dot = os->region->current;
2766 if (os->section_alignment == -1)
2771 dot = align_power (dot, os->bfd_section->alignment_power);
2773 if (dot != olddot && config.warn_section_align)
2774 einfo (_("%P: warning: changing start of section %s by %u bytes\n"),
2775 os->name, (unsigned int) (dot - olddot));
2782 r = exp_fold_tree (os->addr_tree,
2784 lang_allocating_phase_enum,
2786 if (r.valid_p == false)
2788 einfo (_("%F%S: non constant address expression for section %s\n"),
2791 dot = r.value + r.section->bfd_section->vma;
2794 /* The section starts here.
2795 First, align to what the section needs. */
2797 if (os->section_alignment != -1)
2798 dot = align_power (dot, os->section_alignment);
2800 bfd_set_section_vma (0, os->bfd_section, dot);
2802 os->bfd_section->output_offset = 0;
2805 (void) lang_size_sections (os->children.head, os, &os->children.head,
2806 os->fill, dot, relax);
2808 /* Ignore the size of the input sections, use the vma and size to
2811 after = ALIGN_N (os->bfd_section->vma +
2812 os->bfd_section->_raw_size,
2813 /* The coercion here is important, see ld.h. */
2814 (bfd_vma) os->block_value);
2816 if (bfd_is_abs_section (os->bfd_section))
2817 ASSERT (after == os->bfd_section->vma);
2819 os->bfd_section->_raw_size = after - os->bfd_section->vma;
2820 dot = os->bfd_section->vma + os->bfd_section->_raw_size;
2821 os->processed = true;
2823 /* Update dot in the region ?
2824 We only do this if the section is going to be allocated,
2825 since unallocated sections do not contribute to the region's
2826 overall size in memory.
2828 If the SEC_NEVER_LOAD bit is not set, it will affect the
2829 addresses of sections after it. We have to update
2831 if (os->region != (lang_memory_region_type *) NULL
2832 && ((bfd_get_section_flags (output_bfd, os->bfd_section)
2833 & SEC_NEVER_LOAD) == 0
2834 || (bfd_get_section_flags (output_bfd, os->bfd_section)
2835 & (SEC_ALLOC | SEC_LOAD))))
2837 os->region->current = dot;
2839 /* Make sure the new address is within the region. We
2840 explicitly permit the current address to be at the
2841 exact end of the region when the VMA is non-zero,
2842 in case the region is at the end of addressable
2843 memory and the calculation wraps around. */
2844 if ((os->region->current < os->region->origin
2845 || (os->region->current - os->region->origin
2846 > os->region->length))
2847 && ((os->region->current
2848 != os->region->origin + os->region->length)
2849 || os->bfd_section->vma == 0))
2852 if (os->addr_tree != (etree_type *) NULL)
2854 einfo (_("%X%P: address 0x%v of %B section %s is not within region %s\n"),
2855 os->region->current,
2856 os->bfd_section->owner,
2857 os->bfd_section->name,
2862 einfo (_("%X%P: region %s is full (%B section %s)\n"),
2864 os->bfd_section->owner,
2865 os->bfd_section->name);
2867 /* Reset the region pointer. */
2868 os->region->current = os->region->origin;
2874 case lang_constructors_statement_enum:
2875 dot = lang_size_sections (constructor_list.head,
2876 output_section_statement,
2877 &s->wild_statement.children.head,
2882 case lang_data_statement_enum:
2884 unsigned int size = 0;
2886 s->data_statement.output_vma = dot - output_section_statement->bfd_section->vma;
2887 s->data_statement.output_section =
2888 output_section_statement->bfd_section;
2890 switch (s->data_statement.type)
2908 output_section_statement->bfd_section->_raw_size += size;
2909 /* The output section gets contents, and then we inspect for
2910 any flags set in the input script which override any ALLOC. */
2911 output_section_statement->bfd_section->flags |= SEC_HAS_CONTENTS;
2912 if (!(output_section_statement->flags & SEC_NEVER_LOAD)) {
2913 output_section_statement->bfd_section->flags |= SEC_ALLOC | SEC_LOAD;
2918 case lang_reloc_statement_enum:
2922 s->reloc_statement.output_vma =
2923 dot - output_section_statement->bfd_section->vma;
2924 s->reloc_statement.output_section =
2925 output_section_statement->bfd_section;
2926 size = bfd_get_reloc_size (s->reloc_statement.howto);
2928 output_section_statement->bfd_section->_raw_size += size;
2932 case lang_wild_statement_enum:
2934 dot = lang_size_sections (s->wild_statement.children.head,
2935 output_section_statement,
2936 &s->wild_statement.children.head,
2942 case lang_object_symbols_statement_enum:
2943 link_info.create_object_symbols_section =
2944 output_section_statement->bfd_section;
2946 case lang_output_statement_enum:
2947 case lang_target_statement_enum:
2949 case lang_input_section_enum:
2953 i = (*prev)->input_section.section;
2956 if (i->_cooked_size == 0)
2957 i->_cooked_size = i->_raw_size;
2963 if (! bfd_relax_section (i->owner, i, &link_info, &again))
2964 einfo (_("%P%F: can't relax section: %E\n"));
2968 dot = size_input_section (prev,
2969 output_section_statement,
2970 output_section_statement->fill,
2974 case lang_input_statement_enum:
2976 case lang_fill_statement_enum:
2977 s->fill_statement.output_section = output_section_statement->bfd_section;
2979 fill = s->fill_statement.fill;
2981 case lang_assignment_statement_enum:
2983 bfd_vma newdot = dot;
2985 exp_fold_tree (s->assignment_statement.exp,
2986 output_section_statement,
2987 lang_allocating_phase_enum,
2993 /* The assignment changed dot. Insert a pad. */
2994 if (output_section_statement == abs_output_section)
2996 /* If we don't have an output section, then just adjust
2997 the default memory address. */
2998 lang_memory_region_lookup ("*default*")->current = newdot;
3002 lang_statement_union_type *new =
3003 ((lang_statement_union_type *)
3004 stat_alloc (sizeof (lang_padding_statement_type)));
3006 /* Link into existing chain. */
3007 new->header.next = *prev;
3009 new->header.type = lang_padding_statement_enum;
3010 new->padding_statement.output_section =
3011 output_section_statement->bfd_section;
3012 new->padding_statement.output_offset =
3013 dot - output_section_statement->bfd_section->vma;
3014 new->padding_statement.fill = fill;
3015 new->padding_statement.size = newdot - dot;
3016 output_section_statement->bfd_section->_raw_size +=
3017 new->padding_statement.size;
3025 case lang_padding_statement_enum:
3026 /* If we are relaxing, and this is not the first pass, some
3027 padding statements may have been inserted during previous
3028 passes. We may have to move the padding statement to a new
3029 location if dot has a different value at this point in this
3030 pass than it did at this point in the previous pass. */
3031 s->padding_statement.output_offset =
3032 dot - output_section_statement->bfd_section->vma;
3033 dot += s->padding_statement.size;
3034 output_section_statement->bfd_section->_raw_size +=
3035 s->padding_statement.size;
3038 case lang_group_statement_enum:
3039 dot = lang_size_sections (s->group_statement.children.head,
3040 output_section_statement,
3041 &s->group_statement.children.head,
3049 /* This can only get here when relaxing is turned on. */
3051 case lang_address_statement_enum:
3054 prev = &s->header.next;
3060 lang_do_assignments (s, output_section_statement, fill, dot)
3061 lang_statement_union_type * s;
3062 lang_output_section_statement_type * output_section_statement;
3066 for (; s != (lang_statement_union_type *) NULL; s = s->next)
3068 switch (s->header.type)
3070 case lang_constructors_statement_enum:
3071 dot = lang_do_assignments (constructor_list.head,
3072 output_section_statement,
3077 case lang_output_section_statement_enum:
3079 lang_output_section_statement_type *os =
3080 &(s->output_section_statement);
3082 if (os->bfd_section != NULL)
3084 dot = os->bfd_section->vma;
3085 (void) lang_do_assignments (os->children.head, os,
3087 dot = os->bfd_section->vma + os->bfd_section->_raw_size;
3091 /* If nothing has been placed into the output section then
3092 it won't have a bfd_section. */
3093 if (os->bfd_section)
3095 os->bfd_section->lma
3096 = exp_get_abs_int(os->load_base, 0,"load base", lang_final_phase_enum);
3101 case lang_wild_statement_enum:
3103 dot = lang_do_assignments (s->wild_statement.children.head,
3104 output_section_statement,
3109 case lang_object_symbols_statement_enum:
3110 case lang_output_statement_enum:
3111 case lang_target_statement_enum:
3113 case lang_common_statement_enum:
3116 case lang_data_statement_enum:
3118 etree_value_type value;
3120 value = exp_fold_tree (s->data_statement.exp,
3122 lang_final_phase_enum, dot, &dot);
3123 s->data_statement.value = value.value;
3124 if (value.valid_p == false)
3125 einfo (_("%F%P: invalid data statement\n"));
3127 switch (s->data_statement.type)
3145 case lang_reloc_statement_enum:
3147 etree_value_type value;
3149 value = exp_fold_tree (s->reloc_statement.addend_exp,
3151 lang_final_phase_enum, dot, &dot);
3152 s->reloc_statement.addend_value = value.value;
3153 if (value.valid_p == false)
3154 einfo (_("%F%P: invalid reloc statement\n"));
3156 dot += bfd_get_reloc_size (s->reloc_statement.howto);
3159 case lang_input_section_enum:
3161 asection *in = s->input_section.section;
3163 if (in->_cooked_size != 0)
3164 dot += in->_cooked_size;
3166 dot += in->_raw_size;
3170 case lang_input_statement_enum:
3172 case lang_fill_statement_enum:
3173 fill = s->fill_statement.fill;
3175 case lang_assignment_statement_enum:
3177 exp_fold_tree (s->assignment_statement.exp,
3178 output_section_statement,
3179 lang_final_phase_enum,
3185 case lang_padding_statement_enum:
3186 dot += s->padding_statement.size;
3189 case lang_group_statement_enum:
3190 dot = lang_do_assignments (s->group_statement.children.head,
3191 output_section_statement,
3199 case lang_address_statement_enum:
3207 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
3208 operator .startof. (section_name), it produces an undefined symbol
3209 .startof.section_name. Similarly, when it sees
3210 .sizeof. (section_name), it produces an undefined symbol
3211 .sizeof.section_name. For all the output sections, we look for
3212 such symbols, and set them to the correct value. */
3219 if (link_info.relocateable)
3222 for (s = output_bfd->sections; s != NULL; s = s->next)
3224 const char *secname;
3226 struct bfd_link_hash_entry *h;
3228 secname = bfd_get_section_name (output_bfd, s);
3229 buf = xmalloc (10 + strlen (secname));
3231 sprintf (buf, ".startof.%s", secname);
3232 h = bfd_link_hash_lookup (link_info.hash, buf, false, false, true);
3233 if (h != NULL && h->type == bfd_link_hash_undefined)
3235 h->type = bfd_link_hash_defined;
3236 h->u.def.value = bfd_get_section_vma (output_bfd, s);
3237 h->u.def.section = bfd_abs_section_ptr;
3240 sprintf (buf, ".sizeof.%s", secname);
3241 h = bfd_link_hash_lookup (link_info.hash, buf, false, false, true);
3242 if (h != NULL && h->type == bfd_link_hash_undefined)
3244 h->type = bfd_link_hash_defined;
3245 if (s->_cooked_size != 0)
3246 h->u.def.value = s->_cooked_size;
3248 h->u.def.value = s->_raw_size;
3249 h->u.def.section = bfd_abs_section_ptr;
3259 struct bfd_link_hash_entry *h;
3262 if (link_info.relocateable || link_info.shared)
3267 if (entry_symbol == (char *) NULL)
3269 /* No entry has been specified. Look for start, but don't warn
3270 if we don't find it. */
3271 entry_symbol = "start";
3275 h = bfd_link_hash_lookup (link_info.hash, entry_symbol, false, false, true);
3276 if (h != (struct bfd_link_hash_entry *) NULL
3277 && (h->type == bfd_link_hash_defined
3278 || h->type == bfd_link_hash_defweak)
3279 && h->u.def.section->output_section != NULL)
3283 val = (h->u.def.value
3284 + bfd_get_section_vma (output_bfd,
3285 h->u.def.section->output_section)
3286 + h->u.def.section->output_offset);
3287 if (! bfd_set_start_address (output_bfd, val))
3288 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol);
3295 /* We couldn't find the entry symbol. Try parsing it as a
3297 val = bfd_scan_vma (entry_symbol, &send, 0);
3300 if (! bfd_set_start_address (output_bfd, val))
3301 einfo (_("%P%F: can't set start address\n"));
3307 /* Can't find the entry symbol, and it's not a number. Use
3308 the first address in the text section. */
3309 ts = bfd_get_section_by_name (output_bfd, ".text");
3310 if (ts != (asection *) NULL)
3313 einfo (_("%P: warning: cannot find entry symbol %s; defaulting to %V\n"),
3314 entry_symbol, bfd_get_section_vma (output_bfd, ts));
3315 if (! bfd_set_start_address (output_bfd,
3316 bfd_get_section_vma (output_bfd,
3318 einfo (_("%P%F: can't set start address\n"));
3323 einfo (_("%P: warning: cannot find entry symbol %s; not setting start address\n"),
3330 /* This is a small function used when we want to ignore errors from
3334 #ifdef ANSI_PROTOTYPES
3335 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED, ...)
3337 ignore_bfd_errors (s)
3338 const char *s ATTRIBUTE_UNUSED;
3341 /* Don't do anything. */
3344 /* Check that the architecture of all the input files is compatible
3345 with the output file. Also call the backend to let it do any
3346 other checking that is needed. */
3351 lang_statement_union_type *file;
3353 CONST bfd_arch_info_type *compatible;
3355 for (file = file_chain.head;
3356 file != (lang_statement_union_type *) NULL;
3357 file = file->input_statement.next)
3359 input_bfd = file->input_statement.the_bfd;
3360 compatible = bfd_arch_get_compatible (input_bfd,
3362 if (compatible == NULL)
3364 if (command_line.warn_mismatch)
3365 einfo (_("%P: warning: %s architecture of input file `%B' is incompatible with %s output\n"),
3366 bfd_printable_name (input_bfd), input_bfd,
3367 bfd_printable_name (output_bfd));
3371 bfd_error_handler_type pfn = NULL;
3373 /* If we aren't supposed to warn about mismatched input
3374 files, temporarily set the BFD error handler to a
3375 function which will do nothing. We still want to call
3376 bfd_merge_private_bfd_data, since it may set up
3377 information which is needed in the output file. */
3378 if (! command_line.warn_mismatch)
3379 pfn = bfd_set_error_handler (ignore_bfd_errors);
3380 if (! bfd_merge_private_bfd_data (input_bfd, output_bfd))
3382 if (command_line.warn_mismatch)
3383 einfo (_("%E%X: failed to merge target specific data of file %B\n"),
3386 if (! command_line.warn_mismatch)
3387 bfd_set_error_handler (pfn);
3392 /* Look through all the global common symbols and attach them to the
3393 correct section. The -sort-common command line switch may be used
3394 to roughly sort the entries by size. */
3399 if (link_info.relocateable
3400 && ! command_line.force_common_definition)
3403 if (! config.sort_common)
3404 bfd_link_hash_traverse (link_info.hash, lang_one_common, (PTR) NULL);
3409 for (power = 4; power >= 0; power--)
3410 bfd_link_hash_traverse (link_info.hash, lang_one_common,
3415 /* Place one common symbol in the correct section. */
3418 lang_one_common (h, info)
3419 struct bfd_link_hash_entry *h;
3422 unsigned int power_of_two;
3426 if (h->type != bfd_link_hash_common)
3430 power_of_two = h->u.c.p->alignment_power;
3432 if (config.sort_common
3433 && power_of_two < (unsigned int) *(int *) info)
3436 section = h->u.c.p->section;
3438 /* Increase the size of the section. */
3439 section->_cooked_size = ALIGN_N (section->_cooked_size,
3440 (bfd_size_type) (1 << power_of_two));
3442 /* Adjust the alignment if necessary. */
3443 if (power_of_two > section->alignment_power)
3444 section->alignment_power = power_of_two;
3446 /* Change the symbol from common to defined. */
3447 h->type = bfd_link_hash_defined;
3448 h->u.def.section = section;
3449 h->u.def.value = section->_cooked_size;
3451 /* Increase the size of the section. */
3452 section->_cooked_size += size;
3454 /* Make sure the section is allocated in memory, and make sure that
3455 it is no longer a common section. */
3456 section->flags |= SEC_ALLOC;
3457 section->flags &= ~ SEC_IS_COMMON;
3459 if (config.map_file != NULL)
3461 static boolean header_printed;
3466 if (! header_printed)
3468 minfo (_("\nAllocating common symbols\n"));
3469 minfo (_("Common symbol size file\n\n"));
3470 header_printed = true;
3473 name = demangle (h->root.string);
3475 len = strlen (name);
3490 if (size <= 0xffffffff)
3491 sprintf (buf, "%lx", (unsigned long) size);
3493 sprintf_vma (buf, size);
3503 minfo ("%B\n", section->owner);
3510 run through the input files and ensure that every input
3511 section has somewhere to go. If one is found without
3512 a destination then create an input request and place it
3513 into the statement tree.
3517 lang_place_orphans ()
3519 LANG_FOR_EACH_INPUT_STATEMENT (file)
3523 for (s = file->the_bfd->sections;
3524 s != (asection *) NULL;
3527 if (s->output_section == (asection *) NULL)
3529 /* This section of the file is not attatched, root
3530 around for a sensible place for it to go */
3532 if (file->just_syms_flag)
3534 /* We are only retrieving symbol values from this
3535 file. We want the symbols to act as though the
3536 values in the file are absolute. */
3537 s->output_section = bfd_abs_section_ptr;
3538 s->output_offset = s->vma;
3540 else if (strcmp (s->name, "COMMON") == 0)
3542 /* This is a lonely common section which must have
3543 come from an archive. We attach to the section
3544 with the wildcard. */
3545 if (! link_info.relocateable
3546 || command_line.force_common_definition)
3548 if (default_common_section == NULL)
3551 /* This message happens when using the
3552 svr3.ifile linker script, so I have
3554 info_msg (_("%P: no [COMMON] command, defaulting to .bss\n"));
3556 default_common_section =
3557 lang_output_section_statement_lookup (".bss");
3560 wild_doit (&default_common_section->children, s,
3561 default_common_section, file);
3564 else if (ldemul_place_orphan (file, s))
3568 lang_output_section_statement_type *os =
3569 lang_output_section_statement_lookup (s->name);
3571 wild_doit (&os->children, s, os, file);
3580 lang_set_flags (ptr, flags, invert)
3581 lang_memory_region_type *ptr;
3585 flagword *ptr_flags;
3587 ptr_flags = invert ? &ptr->not_flags : &ptr->flags;
3593 *ptr_flags |= SEC_ALLOC;
3597 *ptr_flags |= SEC_READONLY;
3601 *ptr_flags |= SEC_DATA;
3605 *ptr_flags |= SEC_CODE;
3610 *ptr_flags |= SEC_LOAD;
3614 einfo (_("%P%F: invalid syntax in flags\n"));
3621 /* Call a function on each input file. This function will be called
3622 on an archive, but not on the elements. */
3625 lang_for_each_input_file (func)
3626 void (*func) PARAMS ((lang_input_statement_type *));
3628 lang_input_statement_type *f;
3630 for (f = (lang_input_statement_type *) input_file_chain.head;
3632 f = (lang_input_statement_type *) f->next_real_file)
3636 /* Call a function on each file. The function will be called on all
3637 the elements of an archive which are included in the link, but will
3638 not be called on the archive file itself. */
3641 lang_for_each_file (func)
3642 void (*func) PARAMS ((lang_input_statement_type *));
3644 LANG_FOR_EACH_INPUT_STATEMENT (f)
3655 lang_for_each_input_section (func)
3656 void (*func) PARAMS ((bfd * ab, asection * as));
3658 LANG_FOR_EACH_INPUT_STATEMENT (f)
3662 for (s = f->the_bfd->sections;
3663 s != (asection *) NULL;
3666 func (f->the_bfd, s);
3674 ldlang_add_file (entry)
3675 lang_input_statement_type * entry;
3679 lang_statement_append (&file_chain,
3680 (lang_statement_union_type *) entry,
3683 /* The BFD linker needs to have a list of all input BFDs involved in
3685 ASSERT (entry->the_bfd->link_next == (bfd *) NULL);
3686 ASSERT (entry->the_bfd != output_bfd);
3687 for (pp = &link_info.input_bfds;
3688 *pp != (bfd *) NULL;
3689 pp = &(*pp)->link_next)
3691 *pp = entry->the_bfd;
3692 entry->the_bfd->usrdata = (PTR) entry;
3693 bfd_set_gp_size (entry->the_bfd, g_switch_value);
3695 /* Look through the sections and check for any which should not be
3696 included in the link. We need to do this now, so that we can
3697 notice when the backend linker tries to report multiple
3698 definition errors for symbols which are in sections we aren't
3699 going to link. FIXME: It might be better to entirely ignore
3700 symbols which are defined in sections which are going to be
3701 discarded. This would require modifying the backend linker for
3702 each backend which might set the SEC_LINK_ONCE flag. If we do
3703 this, we should probably handle SEC_EXCLUDE in the same way. */
3705 bfd_map_over_sections (entry->the_bfd, section_already_linked, (PTR) entry);
3709 lang_add_output (name, from_script)
3713 /* Make -o on command line override OUTPUT in script. */
3714 if (had_output_filename == false || !from_script)
3716 output_filename = name;
3717 had_output_filename = true;
3722 static lang_output_section_statement_type *current_section;
3734 for (l = 0; l < 32; l++)
3736 if (i >= (unsigned int) x)
3745 lang_enter_output_section_statement (output_section_statement_name,
3746 address_exp, sectype, block_value,
3747 align, subalign, ebase)
3748 const char *output_section_statement_name;
3749 etree_type * address_exp;
3750 enum section_type sectype;
3751 bfd_vma block_value;
3753 etree_type *subalign;
3756 lang_output_section_statement_type *os;
3760 lang_output_section_statement_lookup (output_section_statement_name);
3764 /* Add this statement to tree */
3765 /* add_statement(lang_output_section_statement_enum,
3766 output_section_statement);*/
3767 /* Make next things chain into subchain of this */
3769 if (os->addr_tree ==
3770 (etree_type *) NULL)
3775 os->sectype = sectype;
3776 if (sectype != noload_section)
3777 os->flags = SEC_NO_FLAGS;
3779 os->flags = SEC_NEVER_LOAD;
3780 os->block_value = block_value ? block_value : 1;
3781 stat_ptr = &os->children;
3783 os->subsection_alignment = topower(
3784 exp_get_value_int(subalign, -1,
3785 "subsection alignment",
3787 os->section_alignment = topower(
3788 exp_get_value_int(align, -1,
3789 "section alignment", 0));
3791 os->load_base = ebase;
3798 lang_output_statement_type *new =
3799 new_stat (lang_output_statement, stat_ptr);
3801 new->name = output_filename;
3804 /* Reset the current counters in the regions */
3806 reset_memory_regions ()
3808 lang_memory_region_type *p = lang_memory_region_list;
3810 for (p = lang_memory_region_list;
3811 p != (lang_memory_region_type *) NULL;
3814 p->old_length = (bfd_size_type) (p->current - p->origin);
3815 p->current = p->origin;
3819 /* Expand a wild statement for a particular FILE, marking its sections KEEP
3820 as needed. SECTION may be NULL, in which case it is a wild card. */
3823 gc_section_callback (ptr, section, file, data)
3824 lang_wild_statement_type *ptr;
3826 lang_input_statement_type *file ATTRIBUTE_UNUSED;
3827 void *data ATTRIBUTE_UNUSED;
3829 /* If the wild pattern was marked KEEP, the member sections
3830 should be as well. */
3831 if (ptr->keep_sections)
3832 section->flags |= SEC_KEEP;
3835 /* Handle a wild statement, marking it against GC. SECTION or FILE or both
3836 may be NULL, indicating that it is a wildcard. */
3839 lang_gc_wild (s, section, file)
3840 lang_wild_statement_type *s;
3841 const char *section;
3844 walk_wild (s, section, file, gc_section_callback, NULL);
3847 /* Iterate over sections marking them against GC. */
3850 lang_gc_sections_1 (s)
3851 lang_statement_union_type * s;
3853 for (; s != (lang_statement_union_type *) NULL; s = s->next)
3855 switch (s->header.type)
3857 case lang_wild_statement_enum:
3858 lang_gc_wild (&s->wild_statement,
3859 s->wild_statement.section_name,
3860 s->wild_statement.filename);
3862 case lang_constructors_statement_enum:
3863 lang_gc_sections_1 (constructor_list.head);
3865 case lang_output_section_statement_enum:
3866 lang_gc_sections_1 (s->output_section_statement.children.head);
3868 case lang_group_statement_enum:
3869 lang_gc_sections_1 (s->group_statement.children.head);
3880 struct bfd_link_hash_entry *h;
3881 ldlang_undef_chain_list_type *ulist, fake_list_start;
3883 /* Keep all sections so marked in the link script. */
3885 lang_gc_sections_1 (statement_list.head);
3887 /* Keep all sections containing symbols undefined on the command-line.
3888 Handle the entry symbol at the same time. */
3890 if (entry_symbol != NULL)
3892 fake_list_start.next = ldlang_undef_chain_list_head;
3893 fake_list_start.name = (char *) entry_symbol;
3894 ulist = &fake_list_start;
3897 ulist = ldlang_undef_chain_list_head;
3899 for (; ulist; ulist = ulist->next)
3901 h = bfd_link_hash_lookup (link_info.hash, ulist->name,
3902 false, false, false);
3904 if (h != (struct bfd_link_hash_entry *) NULL
3905 && (h->type == bfd_link_hash_defined
3906 || h->type == bfd_link_hash_defweak)
3907 && ! bfd_is_abs_section (h->u.def.section))
3909 h->u.def.section->flags |= SEC_KEEP;
3913 bfd_gc_sections (output_bfd, &link_info);
3919 lang_reasonable_defaults ();
3920 current_target = default_target;
3922 lang_for_each_statement (ldlang_open_output); /* Open the output file */
3924 ldemul_create_output_section_statements ();
3926 /* Add to the hash table all undefineds on the command line */
3927 lang_place_undefineds ();
3929 already_linked_table_init ();
3931 /* Create a bfd for each input file */
3932 current_target = default_target;
3933 open_input_bfds (statement_list.head, false);
3935 ldemul_after_open ();
3937 already_linked_table_free ();
3939 /* Make sure that we're not mixing architectures. We call this
3940 after all the input files have been opened, but before we do any
3941 other processing, so that any operations merge_private_bfd_data
3942 does on the output file will be known during the rest of the
3946 /* Handle .exports instead of a version script if we're told to do so. */
3947 if (command_line.version_exports_section)
3948 lang_do_version_exports_section ();
3950 /* Build all sets based on the information gathered from the input
3952 ldctor_build_sets ();
3954 /* Remove unreferenced sections if asked to. */
3955 if (command_line.gc_sections)
3956 lang_gc_sections ();
3958 /* Size up the common data */
3961 /* Run through the contours of the script and attach input sections
3962 to the correct output sections
3964 map_input_to_output_sections (statement_list.head, (char *) NULL,
3965 (lang_output_section_statement_type *) NULL);
3968 /* Find any sections not attached explicitly and handle them */
3969 lang_place_orphans ();
3971 ldemul_before_allocation ();
3973 /* We must record the program headers before we try to fix the
3974 section positions, since they will affect SIZEOF_HEADERS. */
3975 lang_record_phdrs ();
3977 /* Now run around and relax if we can */
3978 if (command_line.relax)
3980 /* First time round is a trial run to get the 'worst case'
3981 addresses of the objects if there was no relaxing. */
3982 lang_size_sections (statement_list.head,
3984 &(statement_list.head), 0, (bfd_vma) 0, false);
3986 /* Keep relaxing until bfd_relax_section gives up. */
3989 reset_memory_regions ();
3991 relax_again = false;
3993 /* Note: pe-dll.c does something like this also. If you find
3994 you need to change this code, you probably need to change
3995 pe-dll.c also. DJ */
3997 /* Do all the assignments with our current guesses as to
3999 lang_do_assignments (statement_list.head,
4001 (fill_type) 0, (bfd_vma) 0);
4003 /* Perform another relax pass - this time we know where the
4004 globals are, so can make better guess. */
4005 lang_size_sections (statement_list.head,
4007 &(statement_list.head), 0, (bfd_vma) 0, true);
4009 while (relax_again);
4013 /* Size up the sections. */
4014 lang_size_sections (statement_list.head,
4016 &(statement_list.head), 0, (bfd_vma) 0, false);
4019 /* See if anything special should be done now we know how big
4021 ldemul_after_allocation ();
4023 /* Fix any .startof. or .sizeof. symbols. */
4024 lang_set_startof ();
4026 /* Do all the assignments, now that we know the final restingplaces
4027 of all the symbols */
4029 lang_do_assignments (statement_list.head,
4031 (fill_type) 0, (bfd_vma) 0);
4033 /* Make sure that the section addresses make sense. */
4034 if (! link_info.relocateable
4035 && command_line.check_section_addresses)
4036 lang_check_section_addresses ();
4044 /* EXPORTED TO YACC */
4047 lang_add_wild (section_name, sections_sorted, filename, filenames_sorted,
4048 keep_sections, exclude_filename_list)
4049 const char *const section_name;
4050 boolean sections_sorted;
4051 const char *const filename;
4052 boolean filenames_sorted;
4053 boolean keep_sections;
4054 struct name_list *exclude_filename_list;
4056 lang_wild_statement_type *new = new_stat (lang_wild_statement,
4059 if (section_name != (char *) NULL && strcmp (section_name, "COMMON") == 0)
4061 placed_commons = true;
4063 if (filename != NULL && ! wildcardp (filename))
4065 lang_has_input_file = true;
4067 new->section_name = section_name;
4068 new->sections_sorted = sections_sorted;
4069 new->filename = filename;
4070 new->filenames_sorted = filenames_sorted;
4071 new->keep_sections = keep_sections;
4072 new->exclude_filename_list = exclude_filename_list;
4073 lang_list_init (&new->children);
4077 lang_section_start (name, address)
4079 etree_type * address;
4081 lang_address_statement_type *ad = new_stat (lang_address_statement, stat_ptr);
4083 ad->section_name = name;
4084 ad->address = address;
4087 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
4088 because of a -e argument on the command line, or zero if this is
4089 called by ENTRY in a linker script. Command line arguments take
4093 lang_add_entry (name, cmdline)
4097 if (entry_symbol == NULL
4099 || ! entry_from_cmdline)
4101 entry_symbol = name;
4102 entry_from_cmdline = cmdline;
4107 lang_add_target (name)
4110 lang_target_statement_type *new = new_stat (lang_target_statement,
4126 map_option_f = true;
4137 lang_fill_statement_type *new = new_stat (lang_fill_statement,
4144 lang_add_data (type, exp)
4146 union etree_union *exp;
4149 lang_data_statement_type *new = new_stat (lang_data_statement,
4157 /* Create a new reloc statement. RELOC is the BFD relocation type to
4158 generate. HOWTO is the corresponding howto structure (we could
4159 look this up, but the caller has already done so). SECTION is the
4160 section to generate a reloc against, or NAME is the name of the
4161 symbol to generate a reloc against. Exactly one of SECTION and
4162 NAME must be NULL. ADDEND is an expression for the addend. */
4165 lang_add_reloc (reloc, howto, section, name, addend)
4166 bfd_reloc_code_real_type reloc;
4167 reloc_howto_type *howto;
4170 union etree_union *addend;
4172 lang_reloc_statement_type *p = new_stat (lang_reloc_statement, stat_ptr);
4176 p->section = section;
4178 p->addend_exp = addend;
4180 p->addend_value = 0;
4181 p->output_section = NULL;
4185 lang_assignment_statement_type *
4186 lang_add_assignment (exp)
4189 lang_assignment_statement_type *new = new_stat (lang_assignment_statement,
4197 lang_add_attribute (attribute)
4198 enum statement_enum attribute;
4200 new_statement (attribute, sizeof (lang_statement_union_type), stat_ptr);
4207 if (startup_file != (char *) NULL)
4209 einfo (_("%P%Fmultiple STARTUP files\n"));
4211 first_file->filename = name;
4212 first_file->local_sym_name = name;
4213 first_file->real = true;
4215 startup_file = name;
4222 lang_float_flag = maybe;
4226 lang_leave_output_section_statement (fill, memspec, phdrs)
4228 const char *memspec;
4229 struct lang_output_section_phdr_list *phdrs;
4231 current_section->fill = fill;
4232 current_section->region = lang_memory_region_lookup (memspec);
4233 current_section->phdrs = phdrs;
4234 stat_ptr = &statement_list;
4238 Create an absolute symbol with the given name with the value of the
4239 address of first byte of the section named.
4241 If the symbol already exists, then do nothing.
4244 lang_abs_symbol_at_beginning_of (secname, name)
4245 const char *secname;
4248 struct bfd_link_hash_entry *h;
4250 h = bfd_link_hash_lookup (link_info.hash, name, true, true, true);
4251 if (h == (struct bfd_link_hash_entry *) NULL)
4252 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4254 if (h->type == bfd_link_hash_new
4255 || h->type == bfd_link_hash_undefined)
4259 h->type = bfd_link_hash_defined;
4261 sec = bfd_get_section_by_name (output_bfd, secname);
4262 if (sec == (asection *) NULL)
4265 h->u.def.value = bfd_get_section_vma (output_bfd, sec);
4267 h->u.def.section = bfd_abs_section_ptr;
4272 Create an absolute symbol with the given name with the value of the
4273 address of the first byte after the end of the section named.
4275 If the symbol already exists, then do nothing.
4278 lang_abs_symbol_at_end_of (secname, name)
4279 const char *secname;
4282 struct bfd_link_hash_entry *h;
4284 h = bfd_link_hash_lookup (link_info.hash, name, true, true, true);
4285 if (h == (struct bfd_link_hash_entry *) NULL)
4286 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4288 if (h->type == bfd_link_hash_new
4289 || h->type == bfd_link_hash_undefined)
4293 h->type = bfd_link_hash_defined;
4295 sec = bfd_get_section_by_name (output_bfd, secname);
4296 if (sec == (asection *) NULL)
4299 h->u.def.value = (bfd_get_section_vma (output_bfd, sec)
4300 + bfd_section_size (output_bfd, sec));
4302 h->u.def.section = bfd_abs_section_ptr;
4307 lang_statement_append (list, element, field)
4308 lang_statement_list_type * list;
4309 lang_statement_union_type * element;
4310 lang_statement_union_type ** field;
4312 *(list->tail) = element;
4316 /* Set the output format type. -oformat overrides scripts. */
4319 lang_add_output_format (format, big, little, from_script)
4325 if (output_target == NULL || !from_script)
4327 if (command_line.endian == ENDIAN_BIG
4330 else if (command_line.endian == ENDIAN_LITTLE
4334 output_target = format;
4338 /* Enter a group. This creates a new lang_group_statement, and sets
4339 stat_ptr to build new statements within the group. */
4344 lang_group_statement_type *g;
4346 g = new_stat (lang_group_statement, stat_ptr);
4347 lang_list_init (&g->children);
4348 stat_ptr = &g->children;
4351 /* Leave a group. This just resets stat_ptr to start writing to the
4352 regular list of statements again. Note that this will not work if
4353 groups can occur inside anything else which can adjust stat_ptr,
4354 but currently they can't. */
4359 stat_ptr = &statement_list;
4362 /* Add a new program header. This is called for each entry in a PHDRS
4363 command in a linker script. */
4366 lang_new_phdr (name, type, filehdr, phdrs, at, flags)
4374 struct lang_phdr *n, **pp;
4376 n = (struct lang_phdr *) stat_alloc (sizeof (struct lang_phdr));
4379 n->type = exp_get_value_int (type, 0, "program header type",
4380 lang_final_phase_enum);
4381 n->filehdr = filehdr;
4386 for (pp = &lang_phdr_list; *pp != NULL; pp = &(*pp)->next)
4391 /* Record the program header information in the output BFD. FIXME: We
4392 should not be calling an ELF specific function here. */
4395 lang_record_phdrs ()
4399 struct lang_output_section_phdr_list *last;
4400 struct lang_phdr *l;
4401 lang_statement_union_type *u;
4404 secs = (asection **) xmalloc (alc * sizeof (asection *));
4406 for (l = lang_phdr_list; l != NULL; l = l->next)
4413 for (u = lang_output_section_statement.head;
4415 u = u->output_section_statement.next)
4417 lang_output_section_statement_type *os;
4418 struct lang_output_section_phdr_list *pl;
4420 os = &u->output_section_statement;
4427 if (os->sectype == noload_section
4428 || os->bfd_section == NULL
4429 || (os->bfd_section->flags & SEC_ALLOC) == 0)
4434 if (os->bfd_section == NULL)
4437 for (; pl != NULL; pl = pl->next)
4439 if (strcmp (pl->name, l->name) == 0)
4444 secs = ((asection **)
4445 xrealloc (secs, alc * sizeof (asection *)));
4447 secs[c] = os->bfd_section;
4454 if (l->flags == NULL)
4457 flags = exp_get_vma (l->flags, 0, "phdr flags",
4458 lang_final_phase_enum);
4463 at = exp_get_vma (l->at, 0, "phdr load address",
4464 lang_final_phase_enum);
4466 if (! bfd_record_phdr (output_bfd, l->type,
4467 l->flags == NULL ? false : true,
4469 l->at == NULL ? false : true,
4470 at, l->filehdr, l->phdrs, c, secs))
4471 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
4476 /* Make sure all the phdr assignments succeeded. */
4477 for (u = lang_output_section_statement.head;
4479 u = u->output_section_statement.next)
4481 struct lang_output_section_phdr_list *pl;
4483 if (u->output_section_statement.bfd_section == NULL)
4486 for (pl = u->output_section_statement.phdrs;
4489 if (! pl->used && strcmp (pl->name, "NONE") != 0)
4490 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
4491 u->output_section_statement.name, pl->name);
4495 /* Record a list of sections which may not be cross referenced. */
4498 lang_add_nocrossref (l)
4499 struct lang_nocrossref *l;
4501 struct lang_nocrossrefs *n;
4503 n = (struct lang_nocrossrefs *) xmalloc (sizeof *n);
4504 n->next = nocrossref_list;
4506 nocrossref_list = n;
4508 /* Set notice_all so that we get informed about all symbols. */
4509 link_info.notice_all = true;
4512 /* Overlay handling. We handle overlays with some static variables. */
4514 /* The overlay virtual address. */
4515 static etree_type *overlay_vma;
4517 /* The overlay load address. */
4518 static etree_type *overlay_lma;
4520 /* Whether nocrossrefs is set for this overlay. */
4521 static int overlay_nocrossrefs;
4523 /* An expression for the maximum section size seen so far. */
4524 static etree_type *overlay_max;
4526 /* A list of all the sections in this overlay. */
4530 struct overlay_list *next;
4531 lang_output_section_statement_type *os;
4534 static struct overlay_list *overlay_list;
4536 /* Start handling an overlay. */
4539 lang_enter_overlay (vma_expr, lma_expr, nocrossrefs)
4540 etree_type *vma_expr;
4541 etree_type *lma_expr;
4544 /* The grammar should prevent nested overlays from occurring. */
4545 ASSERT (overlay_vma == NULL
4546 && overlay_lma == NULL
4547 && overlay_list == NULL
4548 && overlay_max == NULL);
4550 overlay_vma = vma_expr;
4551 overlay_lma = lma_expr;
4552 overlay_nocrossrefs = nocrossrefs;
4555 /* Start a section in an overlay. We handle this by calling
4556 lang_enter_output_section_statement with the correct VMA and LMA. */
4559 lang_enter_overlay_section (name)
4562 struct overlay_list *n;
4565 lang_enter_output_section_statement (name, overlay_vma, normal_section,
4566 0, 0, 0, overlay_lma);
4568 /* If this is the first section, then base the VMA and LMA of future
4569 sections on this one. This will work correctly even if `.' is
4570 used in the addresses. */
4571 if (overlay_list == NULL)
4573 overlay_vma = exp_nameop (ADDR, name);
4574 overlay_lma = exp_nameop (LOADADDR, name);
4577 /* Remember the section. */
4578 n = (struct overlay_list *) xmalloc (sizeof *n);
4579 n->os = current_section;
4580 n->next = overlay_list;
4583 size = exp_nameop (SIZEOF, name);
4585 /* Adjust the LMA for the next section. */
4586 overlay_lma = exp_binop ('+', overlay_lma, size);
4588 /* Arrange to work out the maximum section end address. */
4589 if (overlay_max == NULL)
4592 overlay_max = exp_binop (MAX_K, overlay_max, size);
4595 /* Finish a section in an overlay. There isn't any special to do
4599 lang_leave_overlay_section (fill, phdrs)
4601 struct lang_output_section_phdr_list *phdrs;
4608 name = current_section->name;
4610 lang_leave_output_section_statement (fill, "*default*", phdrs);
4612 /* Define the magic symbols. */
4614 clean = xmalloc (strlen (name) + 1);
4616 for (s1 = name; *s1 != '\0'; s1++)
4617 if (isalnum ((unsigned char) *s1) || *s1 == '_')
4621 buf = xmalloc (strlen (clean) + sizeof "__load_start_");
4622 sprintf (buf, "__load_start_%s", clean);
4623 lang_add_assignment (exp_assop ('=', buf,
4624 exp_nameop (LOADADDR, name)));
4626 buf = xmalloc (strlen (clean) + sizeof "__load_stop_");
4627 sprintf (buf, "__load_stop_%s", clean);
4628 lang_add_assignment (exp_assop ('=', buf,
4630 exp_nameop (LOADADDR, name),
4631 exp_nameop (SIZEOF, name))));
4636 /* Finish an overlay. If there are any overlay wide settings, this
4637 looks through all the sections in the overlay and sets them. */
4640 lang_leave_overlay (fill, memspec, phdrs)
4642 const char *memspec;
4643 struct lang_output_section_phdr_list *phdrs;
4645 lang_memory_region_type *region;
4646 struct overlay_list *l;
4647 struct lang_nocrossref *nocrossref;
4649 if (memspec == NULL)
4652 region = lang_memory_region_lookup (memspec);
4659 struct overlay_list *next;
4661 if (fill != 0 && l->os->fill == 0)
4663 if (region != NULL && l->os->region == NULL)
4664 l->os->region = region;
4665 if (phdrs != NULL && l->os->phdrs == NULL)
4666 l->os->phdrs = phdrs;
4668 if (overlay_nocrossrefs)
4670 struct lang_nocrossref *nc;
4672 nc = (struct lang_nocrossref *) xmalloc (sizeof *nc);
4673 nc->name = l->os->name;
4674 nc->next = nocrossref;
4683 if (nocrossref != NULL)
4684 lang_add_nocrossref (nocrossref);
4686 /* Update . for the end of the overlay. */
4687 lang_add_assignment (exp_assop ('=', ".",
4688 exp_binop ('+', overlay_vma, overlay_max)));
4692 overlay_nocrossrefs = 0;
4693 overlay_list = NULL;
4697 /* Version handling. This is only useful for ELF. */
4699 /* This global variable holds the version tree that we build. */
4701 struct bfd_elf_version_tree *lang_elf_version_info;
4704 lang_vers_match_lang_c (expr, sym)
4705 struct bfd_elf_version_expr *expr;
4708 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
4710 return fnmatch (expr->pattern, sym, 0) == 0;
4714 lang_vers_match_lang_cplusplus (expr, sym)
4715 struct bfd_elf_version_expr *expr;
4721 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
4724 alt_sym = cplus_demangle(sym, /* DMGL_NO_TPARAMS */ 0);
4727 /* cplus_demangle (also) returns NULL when it is not a C++ symbol.
4728 Should we early out false in this case? */
4729 result = fnmatch (expr->pattern, sym, 0) == 0;
4733 result = fnmatch (expr->pattern, alt_sym, 0) == 0;
4741 lang_vers_match_lang_java (expr, sym)
4742 struct bfd_elf_version_expr *expr;
4748 if (expr->pattern[0] == '*' && expr->pattern[1] == '\0')
4751 alt_sym = cplus_demangle(sym, DMGL_JAVA);
4754 /* cplus_demangle (also) returns NULL when it is not a Java symbol.
4755 Should we early out false in this case? */
4756 result = fnmatch (expr->pattern, sym, 0) == 0;
4760 result = fnmatch (expr->pattern, alt_sym, 0) == 0;
4767 /* This is called for each variable name or match expression. */
4769 struct bfd_elf_version_expr *
4770 lang_new_vers_regex (orig, new, lang)
4771 struct bfd_elf_version_expr *orig;
4775 struct bfd_elf_version_expr *ret;
4777 ret = (struct bfd_elf_version_expr *) xmalloc (sizeof *ret);
4781 if (lang == NULL || strcasecmp (lang, "C") == 0)
4782 ret->match = lang_vers_match_lang_c;
4783 else if (strcasecmp (lang, "C++") == 0)
4784 ret->match = lang_vers_match_lang_cplusplus;
4785 else if (strcasecmp (lang, "Java") == 0)
4786 ret->match = lang_vers_match_lang_java;
4789 einfo (_("%X%P: unknown language `%s' in version information\n"),
4791 ret->match = lang_vers_match_lang_c;
4797 /* This is called for each set of variable names and match
4800 struct bfd_elf_version_tree *
4801 lang_new_vers_node (globals, locals)
4802 struct bfd_elf_version_expr *globals;
4803 struct bfd_elf_version_expr *locals;
4805 struct bfd_elf_version_tree *ret;
4807 ret = (struct bfd_elf_version_tree *) xmalloc (sizeof *ret);
4811 ret->globals = globals;
4812 ret->locals = locals;
4814 ret->name_indx = (unsigned int) -1;
4819 /* This static variable keeps track of version indices. */
4821 static int version_index;
4823 /* This is called when we know the name and dependencies of the
4827 lang_register_vers_node (name, version, deps)
4829 struct bfd_elf_version_tree *version;
4830 struct bfd_elf_version_deps *deps;
4832 struct bfd_elf_version_tree *t, **pp;
4833 struct bfd_elf_version_expr *e1;
4835 /* Make sure this node has a unique name. */
4836 for (t = lang_elf_version_info; t != NULL; t = t->next)
4837 if (strcmp (t->name, name) == 0)
4838 einfo (_("%X%P: duplicate version tag `%s'\n"), name);
4840 /* Check the global and local match names, and make sure there
4841 aren't any duplicates. */
4843 for (e1 = version->globals; e1 != NULL; e1 = e1->next)
4845 for (t = lang_elf_version_info; t != NULL; t = t->next)
4847 struct bfd_elf_version_expr *e2;
4849 for (e2 = t->locals; e2 != NULL; e2 = e2->next)
4850 if (strcmp (e1->pattern, e2->pattern) == 0)
4851 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
4856 for (e1 = version->locals; e1 != NULL; e1 = e1->next)
4858 for (t = lang_elf_version_info; t != NULL; t = t->next)
4860 struct bfd_elf_version_expr *e2;
4862 for (e2 = t->globals; e2 != NULL; e2 = e2->next)
4863 if (strcmp (e1->pattern, e2->pattern) == 0)
4864 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
4869 version->deps = deps;
4870 version->name = name;
4872 version->vernum = version_index;
4874 for (pp = &lang_elf_version_info; *pp != NULL; pp = &(*pp)->next)
4879 /* This is called when we see a version dependency. */
4881 struct bfd_elf_version_deps *
4882 lang_add_vers_depend (list, name)
4883 struct bfd_elf_version_deps *list;
4886 struct bfd_elf_version_deps *ret;
4887 struct bfd_elf_version_tree *t;
4889 ret = (struct bfd_elf_version_deps *) xmalloc (sizeof *ret);
4892 for (t = lang_elf_version_info; t != NULL; t = t->next)
4894 if (strcmp (t->name, name) == 0)
4896 ret->version_needed = t;
4901 einfo (_("%X%P: unable to find version dependency `%s'\n"), name);
4907 lang_do_version_exports_section ()
4909 struct bfd_elf_version_expr *greg = NULL, *lreg;
4911 LANG_FOR_EACH_INPUT_STATEMENT (is)
4913 asection *sec = bfd_get_section_by_name (is->the_bfd, ".exports");
4920 len = bfd_section_size (is->the_bfd, sec);
4921 contents = xmalloc (len);
4922 if (!bfd_get_section_contents (is->the_bfd, sec, contents, 0, len))
4923 einfo (_("%X%P: unable to read .exports section contents"), sec);
4926 while (p < contents+len)
4928 greg = lang_new_vers_regex (greg, p, NULL);
4929 p = strchr (p, '\0') + 1;
4932 /* Do not free the contents, as we used them creating the regex. */
4934 /* Do not include this section in the link. */
4935 bfd_set_section_flags (is->the_bfd, sec,
4936 bfd_get_section_flags (is->the_bfd, sec) | SEC_EXCLUDE);
4939 lreg = lang_new_vers_regex (NULL, "*", NULL);
4940 lang_register_vers_node (command_line.version_exports_section,
4941 lang_new_vers_node (greg, lreg), NULL);