1 /* Linker command language support.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 Free Software Foundation, Inc.
6 This file is part of GLD, the Gnu Linker.
8 GLD is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GLD is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GLD; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 #include "libiberty.h"
26 #include "safe-ctype.h"
45 #define offsetof(TYPE, MEMBER) ((size_t) & (((TYPE*) 0)->MEMBER))
48 /* Locals variables. */
49 static struct obstack stat_obstack
;
50 static struct obstack map_obstack
;
52 #define obstack_chunk_alloc xmalloc
53 #define obstack_chunk_free free
54 static const char *startup_file
;
55 static lang_statement_list_type input_file_chain
;
56 static bfd_boolean placed_commons
= FALSE
;
57 static lang_output_section_statement_type
*default_common_section
;
58 static bfd_boolean map_option_f
;
59 static bfd_vma print_dot
;
60 static lang_input_statement_type
*first_file
;
61 static const char *current_target
;
62 static const char *output_target
;
63 static lang_statement_list_type statement_list
;
64 static struct lang_phdr
*lang_phdr_list
;
65 static struct bfd_hash_table lang_definedness_table
;
67 /* Forward declarations. */
68 static void exp_init_os (etree_type
*);
69 static void init_map_userdata (bfd
*, asection
*, void *);
70 static bfd_boolean
wildcardp (const char *);
71 static lang_input_statement_type
*lookup_name (const char *);
72 static bfd_boolean
load_symbols (lang_input_statement_type
*,
73 lang_statement_list_type
*);
74 static struct bfd_hash_entry
*lang_definedness_newfunc
75 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
76 static void insert_undefined (const char *);
77 static void print_all_symbols (asection
*);
78 static bfd_boolean
sort_def_symbol (struct bfd_link_hash_entry
*, void *);
79 static void print_statement (lang_statement_union_type
*,
80 lang_output_section_statement_type
*);
81 static void print_statement_list (lang_statement_union_type
*,
82 lang_output_section_statement_type
*);
83 static void print_statements (void);
84 static bfd_boolean
lang_one_common (struct bfd_link_hash_entry
*, void *);
85 static void lang_record_phdrs (void);
86 static void lang_do_version_exports_section (void);
88 typedef void (*callback_t
) (lang_wild_statement_type
*, struct wildcard_list
*,
89 asection
*, lang_input_statement_type
*, void *);
91 /* Exported variables. */
92 lang_output_section_statement_type
*abs_output_section
;
93 lang_statement_list_type lang_output_section_statement
;
94 lang_statement_list_type
*stat_ptr
= &statement_list
;
95 lang_statement_list_type file_chain
= { NULL
, NULL
};
96 struct bfd_sym_chain entry_symbol
= { NULL
, NULL
};
97 const char *entry_section
= ".text";
98 bfd_boolean entry_from_cmdline
;
99 bfd_boolean lang_has_input_file
= FALSE
;
100 bfd_boolean had_output_filename
= FALSE
;
101 bfd_boolean lang_float_flag
= FALSE
;
102 bfd_boolean delete_output_file_on_failure
= FALSE
;
103 struct lang_nocrossrefs
*nocrossref_list
;
104 struct unique_sections
*unique_section_list
;
105 static bfd_boolean ldlang_sysrooted_script
= FALSE
;
106 int lang_statement_iteration
= 0;
108 etree_type
*base
; /* Relocation base - or null */
110 #define new_stat(x, y) \
111 (x##_type *) new_statement (x##_enum, sizeof (x##_type), y)
113 #define outside_section_address(q) \
114 ((q)->output_offset + (q)->output_section->vma)
116 #define outside_symbol_address(q) \
117 ((q)->value + outside_section_address (q->section))
119 #define SECTION_NAME_MAP_LENGTH (16)
122 stat_alloc (size_t size
)
124 return obstack_alloc (&stat_obstack
, size
);
128 unique_section_p (const asection
*sec
)
130 struct unique_sections
*unam
;
133 if (link_info
.relocatable
134 && sec
->owner
!= NULL
135 && bfd_is_group_section (sec
->owner
, sec
))
139 for (unam
= unique_section_list
; unam
; unam
= unam
->next
)
140 if (wildcardp (unam
->name
)
141 ? fnmatch (unam
->name
, secnam
, 0) == 0
142 : strcmp (unam
->name
, secnam
) == 0)
150 /* Generic traversal routines for finding matching sections. */
153 walk_wild_section (lang_wild_statement_type
*ptr
,
154 lang_input_statement_type
*file
,
160 if (file
->just_syms_flag
)
163 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
165 struct wildcard_list
*sec
;
167 sec
= ptr
->section_list
;
169 (*callback
) (ptr
, sec
, s
, file
, data
);
173 bfd_boolean skip
= FALSE
;
174 struct name_list
*list_tmp
;
176 /* Don't process sections from files which were
178 for (list_tmp
= sec
->spec
.exclude_name_list
;
180 list_tmp
= list_tmp
->next
)
182 if (wildcardp (list_tmp
->name
))
183 skip
= fnmatch (list_tmp
->name
, file
->filename
, 0) == 0;
185 skip
= strcmp (list_tmp
->name
, file
->filename
) == 0;
187 /* If this file is part of an archive, and the archive is
188 excluded, exclude this file. */
189 if (! skip
&& file
->the_bfd
!= NULL
190 && file
->the_bfd
->my_archive
!= NULL
191 && file
->the_bfd
->my_archive
->filename
!= NULL
)
193 if (wildcardp (list_tmp
->name
))
194 skip
= fnmatch (list_tmp
->name
,
195 file
->the_bfd
->my_archive
->filename
,
198 skip
= strcmp (list_tmp
->name
,
199 file
->the_bfd
->my_archive
->filename
) == 0;
206 if (!skip
&& sec
->spec
.name
!= NULL
)
208 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
210 if (wildcardp (sec
->spec
.name
))
211 skip
= fnmatch (sec
->spec
.name
, sname
, 0) != 0;
213 skip
= strcmp (sec
->spec
.name
, sname
) != 0;
217 (*callback
) (ptr
, sec
, s
, file
, data
);
224 /* Handle a wild statement for a single file F. */
227 walk_wild_file (lang_wild_statement_type
*s
,
228 lang_input_statement_type
*f
,
232 if (f
->the_bfd
== NULL
233 || ! bfd_check_format (f
->the_bfd
, bfd_archive
))
234 walk_wild_section (s
, f
, callback
, data
);
239 /* This is an archive file. We must map each member of the
240 archive separately. */
241 member
= bfd_openr_next_archived_file (f
->the_bfd
, NULL
);
242 while (member
!= NULL
)
244 /* When lookup_name is called, it will call the add_symbols
245 entry point for the archive. For each element of the
246 archive which is included, BFD will call ldlang_add_file,
247 which will set the usrdata field of the member to the
248 lang_input_statement. */
249 if (member
->usrdata
!= NULL
)
251 walk_wild_section (s
, member
->usrdata
, callback
, data
);
254 member
= bfd_openr_next_archived_file (f
->the_bfd
, member
);
260 walk_wild (lang_wild_statement_type
*s
, callback_t callback
, void *data
)
262 const char *file_spec
= s
->filename
;
264 if (file_spec
== NULL
)
266 /* Perform the iteration over all files in the list. */
267 LANG_FOR_EACH_INPUT_STATEMENT (f
)
269 walk_wild_file (s
, f
, callback
, data
);
272 else if (wildcardp (file_spec
))
274 LANG_FOR_EACH_INPUT_STATEMENT (f
)
276 if (fnmatch (file_spec
, f
->filename
, FNM_FILE_NAME
) == 0)
277 walk_wild_file (s
, f
, callback
, data
);
282 lang_input_statement_type
*f
;
284 /* Perform the iteration over a single file. */
285 f
= lookup_name (file_spec
);
287 walk_wild_file (s
, f
, callback
, data
);
291 /* lang_for_each_statement walks the parse tree and calls the provided
292 function for each node. */
295 lang_for_each_statement_worker (void (*func
) (lang_statement_union_type
*),
296 lang_statement_union_type
*s
)
298 for (; s
!= NULL
; s
= s
->header
.next
)
302 switch (s
->header
.type
)
304 case lang_constructors_statement_enum
:
305 lang_for_each_statement_worker (func
, constructor_list
.head
);
307 case lang_output_section_statement_enum
:
308 lang_for_each_statement_worker
309 (func
, s
->output_section_statement
.children
.head
);
311 case lang_wild_statement_enum
:
312 lang_for_each_statement_worker (func
,
313 s
->wild_statement
.children
.head
);
315 case lang_group_statement_enum
:
316 lang_for_each_statement_worker (func
,
317 s
->group_statement
.children
.head
);
319 case lang_data_statement_enum
:
320 case lang_reloc_statement_enum
:
321 case lang_object_symbols_statement_enum
:
322 case lang_output_statement_enum
:
323 case lang_target_statement_enum
:
324 case lang_input_section_enum
:
325 case lang_input_statement_enum
:
326 case lang_assignment_statement_enum
:
327 case lang_padding_statement_enum
:
328 case lang_address_statement_enum
:
329 case lang_fill_statement_enum
:
339 lang_for_each_statement (void (*func
) (lang_statement_union_type
*))
341 lang_for_each_statement_worker (func
, statement_list
.head
);
344 /*----------------------------------------------------------------------*/
347 lang_list_init (lang_statement_list_type
*list
)
350 list
->tail
= &list
->head
;
353 /* Build a new statement node for the parse tree. */
355 static lang_statement_union_type
*
356 new_statement (enum statement_enum type
,
358 lang_statement_list_type
*list
)
360 lang_statement_union_type
*new;
362 new = stat_alloc (size
);
363 new->header
.type
= type
;
364 new->header
.next
= NULL
;
365 lang_statement_append (list
, new, &new->header
.next
);
369 /* Build a new input file node for the language. There are several
370 ways in which we treat an input file, eg, we only look at symbols,
371 or prefix it with a -l etc.
373 We can be supplied with requests for input files more than once;
374 they may, for example be split over several lines like foo.o(.text)
375 foo.o(.data) etc, so when asked for a file we check that we haven't
376 got it already so we don't duplicate the bfd. */
378 static lang_input_statement_type
*
379 new_afile (const char *name
,
380 lang_input_file_enum_type file_type
,
382 bfd_boolean add_to_list
)
384 lang_input_statement_type
*p
;
387 p
= new_stat (lang_input_statement
, stat_ptr
);
390 p
= stat_alloc (sizeof (lang_input_statement_type
));
391 p
->header
.next
= NULL
;
394 lang_has_input_file
= TRUE
;
396 p
->sysrooted
= FALSE
;
399 case lang_input_file_is_symbols_only_enum
:
401 p
->is_archive
= FALSE
;
403 p
->local_sym_name
= name
;
404 p
->just_syms_flag
= TRUE
;
405 p
->search_dirs_flag
= FALSE
;
407 case lang_input_file_is_fake_enum
:
409 p
->is_archive
= FALSE
;
411 p
->local_sym_name
= name
;
412 p
->just_syms_flag
= FALSE
;
413 p
->search_dirs_flag
= FALSE
;
415 case lang_input_file_is_l_enum
:
416 p
->is_archive
= TRUE
;
419 p
->local_sym_name
= concat ("-l", name
, NULL
);
420 p
->just_syms_flag
= FALSE
;
421 p
->search_dirs_flag
= TRUE
;
423 case lang_input_file_is_marker_enum
:
425 p
->is_archive
= FALSE
;
427 p
->local_sym_name
= name
;
428 p
->just_syms_flag
= FALSE
;
429 p
->search_dirs_flag
= TRUE
;
431 case lang_input_file_is_search_file_enum
:
432 p
->sysrooted
= ldlang_sysrooted_script
;
434 p
->is_archive
= FALSE
;
436 p
->local_sym_name
= name
;
437 p
->just_syms_flag
= FALSE
;
438 p
->search_dirs_flag
= TRUE
;
440 case lang_input_file_is_file_enum
:
442 p
->is_archive
= FALSE
;
444 p
->local_sym_name
= name
;
445 p
->just_syms_flag
= FALSE
;
446 p
->search_dirs_flag
= FALSE
;
453 p
->next_real_file
= NULL
;
456 p
->dynamic
= config
.dynamic_link
;
457 p
->add_needed
= add_needed
;
458 p
->as_needed
= as_needed
;
459 p
->whole_archive
= whole_archive
;
461 lang_statement_append (&input_file_chain
,
462 (lang_statement_union_type
*) p
,
467 lang_input_statement_type
*
468 lang_add_input_file (const char *name
,
469 lang_input_file_enum_type file_type
,
472 lang_has_input_file
= TRUE
;
473 return new_afile (name
, file_type
, target
, TRUE
);
476 /* Build enough state so that the parser can build its tree. */
481 obstack_begin (&stat_obstack
, 1000);
483 stat_ptr
= &statement_list
;
485 lang_list_init (stat_ptr
);
487 lang_list_init (&input_file_chain
);
488 lang_list_init (&lang_output_section_statement
);
489 lang_list_init (&file_chain
);
490 first_file
= lang_add_input_file (NULL
, lang_input_file_is_marker_enum
,
493 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME
);
495 abs_output_section
->bfd_section
= bfd_abs_section_ptr
;
497 /* The value "3" is ad-hoc, somewhat related to the expected number of
498 DEFINED expressions in a linker script. For most default linker
499 scripts, there are none. Why a hash table then? Well, it's somewhat
500 simpler to re-use working machinery than using a linked list in terms
501 of code-complexity here in ld, besides the initialization which just
502 looks like other code here. */
503 if (bfd_hash_table_init_n (&lang_definedness_table
,
504 lang_definedness_newfunc
, 3) != TRUE
)
505 einfo (_("%P%F: out of memory during initialization"));
507 /* Callers of exp_fold_tree need to increment this. */
508 lang_statement_iteration
= 0;
511 /*----------------------------------------------------------------------
512 A region is an area of memory declared with the
513 MEMORY { name:org=exp, len=exp ... }
516 We maintain a list of all the regions here.
518 If no regions are specified in the script, then the default is used
519 which is created when looked up to be the entire data space.
521 If create is true we are creating a region inside a MEMORY block.
522 In this case it is probably an error to create a region that has
523 already been created. If we are not inside a MEMORY block it is
524 dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION)
525 and so we issue a warning. */
527 static lang_memory_region_type
*lang_memory_region_list
;
528 static lang_memory_region_type
**lang_memory_region_list_tail
529 = &lang_memory_region_list
;
531 lang_memory_region_type
*
532 lang_memory_region_lookup (const char *const name
, bfd_boolean create
)
534 lang_memory_region_type
*p
;
535 lang_memory_region_type
*new;
537 /* NAME is NULL for LMA memspecs if no region was specified. */
541 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
542 if (strcmp (p
->name
, name
) == 0)
545 einfo (_("%P:%S: warning: redeclaration of memory region '%s'\n"),
551 /* This code used to always use the first region in the list as the
552 default region. I changed it to instead use a region
553 encompassing all of memory as the default region. This permits
554 NOLOAD sections to work reasonably without requiring a region.
555 People should specify what region they mean, if they really want
557 if (strcmp (name
, DEFAULT_MEMORY_REGION
) == 0)
559 if (lang_memory_region_list
!= NULL
)
560 return lang_memory_region_list
;
564 if (!create
&& strcmp (name
, DEFAULT_MEMORY_REGION
))
565 einfo (_("%P:%S: warning: memory region %s not declared\n"), name
);
567 new = stat_alloc (sizeof (lang_memory_region_type
));
569 new->name
= xstrdup (name
);
572 *lang_memory_region_list_tail
= new;
573 lang_memory_region_list_tail
= &new->next
;
577 new->length
= ~(bfd_size_type
) 0;
579 new->had_full_message
= FALSE
;
584 static lang_memory_region_type
*
585 lang_memory_default (asection
*section
)
587 lang_memory_region_type
*p
;
589 flagword sec_flags
= section
->flags
;
591 /* Override SEC_DATA to mean a writable section. */
592 if ((sec_flags
& (SEC_ALLOC
| SEC_READONLY
| SEC_CODE
)) == SEC_ALLOC
)
593 sec_flags
|= SEC_DATA
;
595 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
597 if ((p
->flags
& sec_flags
) != 0
598 && (p
->not_flags
& sec_flags
) == 0)
603 return lang_memory_region_lookup (DEFAULT_MEMORY_REGION
, FALSE
);
606 static lang_output_section_statement_type
*
607 lang_output_section_find_1 (const char *const name
, int constraint
)
609 lang_statement_union_type
*u
;
610 lang_output_section_statement_type
*lookup
;
612 for (u
= lang_output_section_statement
.head
; u
!= NULL
; u
= lookup
->next
)
614 lookup
= &u
->output_section_statement
;
615 if (strcmp (name
, lookup
->name
) == 0
616 && lookup
->constraint
!= -1
617 && (constraint
== 0 || constraint
== lookup
->constraint
))
623 lang_output_section_statement_type
*
624 lang_output_section_find (const char *const name
)
626 return lang_output_section_find_1 (name
, 0);
629 static lang_output_section_statement_type
*
630 lang_output_section_statement_lookup_1 (const char *const name
, int constraint
)
632 lang_output_section_statement_type
*lookup
;
634 lookup
= lang_output_section_find_1 (name
, constraint
);
637 lookup
= new_stat (lang_output_section_statement
, stat_ptr
);
638 lookup
->region
= NULL
;
639 lookup
->lma_region
= NULL
;
641 lookup
->block_value
= 1;
645 lookup
->bfd_section
= NULL
;
646 lookup
->processed
= 0;
647 lookup
->constraint
= constraint
;
648 lookup
->sectype
= normal_section
;
649 lookup
->addr_tree
= NULL
;
650 lang_list_init (&lookup
->children
);
652 lookup
->memspec
= NULL
;
654 lookup
->subsection_alignment
= -1;
655 lookup
->section_alignment
= -1;
656 lookup
->load_base
= NULL
;
657 lookup
->update_dot_tree
= NULL
;
658 lookup
->phdrs
= NULL
;
660 lang_statement_append (&lang_output_section_statement
,
661 (lang_statement_union_type
*) lookup
,
667 lang_output_section_statement_type
*
668 lang_output_section_statement_lookup (const char *const name
)
670 return lang_output_section_statement_lookup_1 (name
, 0);
674 lang_map_flags (flagword flag
)
676 if (flag
& SEC_ALLOC
)
682 if (flag
& SEC_READONLY
)
695 lang_memory_region_type
*m
;
698 minfo (_("\nMemory Configuration\n\n"));
699 fprintf (config
.map_file
, "%-16s %-18s %-18s %s\n",
700 _("Name"), _("Origin"), _("Length"), _("Attributes"));
702 for (m
= lang_memory_region_list
; m
!= NULL
; m
= m
->next
)
707 fprintf (config
.map_file
, "%-16s ", m
->name
);
709 sprintf_vma (buf
, m
->origin
);
710 minfo ("0x%s ", buf
);
718 minfo ("0x%V", m
->length
);
719 if (m
->flags
|| m
->not_flags
)
727 lang_map_flags (m
->flags
);
733 lang_map_flags (m
->not_flags
);
740 fprintf (config
.map_file
, _("\nLinker script and memory map\n\n"));
742 if (! command_line
.reduce_memory_overheads
)
744 obstack_begin (&map_obstack
, 1000);
745 for (p
= link_info
.input_bfds
; p
!= (bfd
*) NULL
; p
= p
->link_next
)
746 bfd_map_over_sections (p
, init_map_userdata
, 0);
747 bfd_link_hash_traverse (link_info
.hash
, sort_def_symbol
, 0);
753 init_map_userdata (abfd
, sec
, data
)
754 bfd
*abfd ATTRIBUTE_UNUSED
;
756 void *data ATTRIBUTE_UNUSED
;
758 fat_section_userdata_type
*new_data
759 = ((fat_section_userdata_type
*) (stat_alloc
760 (sizeof (fat_section_userdata_type
))));
762 ASSERT (get_userdata (sec
) == NULL
);
763 get_userdata (sec
) = new_data
;
764 new_data
->map_symbol_def_tail
= &new_data
->map_symbol_def_head
;
768 sort_def_symbol (hash_entry
, info
)
769 struct bfd_link_hash_entry
*hash_entry
;
770 void *info ATTRIBUTE_UNUSED
;
772 if (hash_entry
->type
== bfd_link_hash_defined
773 || hash_entry
->type
== bfd_link_hash_defweak
)
775 struct fat_user_section_struct
*ud
;
776 struct map_symbol_def
*def
;
778 ud
= get_userdata (hash_entry
->u
.def
.section
);
781 /* ??? What do we have to do to initialize this beforehand? */
782 /* The first time we get here is bfd_abs_section... */
783 init_map_userdata (0, hash_entry
->u
.def
.section
, 0);
784 ud
= get_userdata (hash_entry
->u
.def
.section
);
786 else if (!ud
->map_symbol_def_tail
)
787 ud
->map_symbol_def_tail
= &ud
->map_symbol_def_head
;
789 def
= obstack_alloc (&map_obstack
, sizeof *def
);
790 def
->entry
= hash_entry
;
791 *(ud
->map_symbol_def_tail
) = def
;
792 ud
->map_symbol_def_tail
= &def
->next
;
797 /* Initialize an output section. */
800 init_os (lang_output_section_statement_type
*s
)
802 lean_section_userdata_type
*new;
804 if (s
->bfd_section
!= NULL
)
807 if (strcmp (s
->name
, DISCARD_SECTION_NAME
) == 0)
808 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME
);
810 new = stat_alloc (SECTION_USERDATA_SIZE
);
811 memset (new, 0, SECTION_USERDATA_SIZE
);
813 s
->bfd_section
= bfd_get_section_by_name (output_bfd
, s
->name
);
814 if (s
->bfd_section
== NULL
)
815 s
->bfd_section
= bfd_make_section (output_bfd
, s
->name
);
816 if (s
->bfd_section
== NULL
)
818 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
819 output_bfd
->xvec
->name
, s
->name
);
821 s
->bfd_section
->output_section
= s
->bfd_section
;
823 /* We initialize an output sections output offset to minus its own
824 vma to allow us to output a section through itself. */
825 s
->bfd_section
->output_offset
= 0;
826 get_userdata (s
->bfd_section
) = new;
828 /* If there is a base address, make sure that any sections it might
829 mention are initialized. */
830 if (s
->addr_tree
!= NULL
)
831 exp_init_os (s
->addr_tree
);
833 if (s
->load_base
!= NULL
)
834 exp_init_os (s
->load_base
);
837 /* Make sure that all output sections mentioned in an expression are
841 exp_init_os (etree_type
*exp
)
843 switch (exp
->type
.node_class
)
846 exp_init_os (exp
->assign
.src
);
850 exp_init_os (exp
->binary
.lhs
);
851 exp_init_os (exp
->binary
.rhs
);
855 exp_init_os (exp
->trinary
.cond
);
856 exp_init_os (exp
->trinary
.lhs
);
857 exp_init_os (exp
->trinary
.rhs
);
861 exp_init_os (exp
->assert_s
.child
);
865 exp_init_os (exp
->unary
.child
);
869 switch (exp
->type
.node_code
)
875 lang_output_section_statement_type
*os
;
877 os
= lang_output_section_find (exp
->name
.name
);
878 if (os
!= NULL
&& os
->bfd_section
== NULL
)
889 /* Sections marked with the SEC_LINK_ONCE flag should only be linked
890 once into the output. This routine checks each section, and
891 arrange to discard it if a section of the same name has already
892 been linked. If the section has COMDAT information, then it uses
893 that to decide whether the section should be included. This code
894 assumes that all relevant sections have the SEC_LINK_ONCE flag set;
895 that is, it does not depend solely upon the section name.
896 section_already_linked is called via bfd_map_over_sections. */
898 /* This is the shape of the elements inside the already_linked hash
899 table. It maps a name onto a list of already_linked elements with
900 the same name. It's possible to get more than one element in a
901 list if the COMDAT sections have different names. */
903 struct already_linked_hash_entry
905 struct bfd_hash_entry root
;
906 struct already_linked
*entry
;
909 struct already_linked
911 struct already_linked
*next
;
915 /* The hash table. */
917 static struct bfd_hash_table already_linked_table
;
920 section_already_linked (bfd
*abfd
, asection
*sec
, void *data
)
922 lang_input_statement_type
*entry
= data
;
925 struct already_linked
*l
;
926 struct already_linked_hash_entry
*already_linked_list
;
928 /* If we are only reading symbols from this object, then we want to
929 discard all sections. */
930 if (entry
->just_syms_flag
)
932 bfd_link_just_syms (sec
, &link_info
);
937 if ((flags
& SEC_LINK_ONCE
) == 0)
940 /* FIXME: When doing a relocatable link, we may have trouble
941 copying relocations in other sections that refer to local symbols
942 in the section being discarded. Those relocations will have to
943 be converted somehow; as of this writing I'm not sure that any of
944 the backends handle that correctly.
946 It is tempting to instead not discard link once sections when
947 doing a relocatable link (technically, they should be discarded
948 whenever we are building constructors). However, that fails,
949 because the linker winds up combining all the link once sections
950 into a single large link once section, which defeats the purpose
951 of having link once sections in the first place.
953 Also, not merging link once sections in a relocatable link
954 causes trouble for MIPS ELF, which relies on link once semantics
955 to handle the .reginfo section correctly. */
957 name
= bfd_get_section_name (abfd
, sec
);
959 already_linked_list
=
960 ((struct already_linked_hash_entry
*)
961 bfd_hash_lookup (&already_linked_table
, name
, TRUE
, FALSE
));
963 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
965 if (sec
->comdat
== NULL
966 || l
->sec
->comdat
== NULL
967 || strcmp (sec
->comdat
->name
, l
->sec
->comdat
->name
) == 0)
969 /* The section has already been linked. See if we should
971 switch (flags
& SEC_LINK_DUPLICATES
)
976 case SEC_LINK_DUPLICATES_DISCARD
:
979 case SEC_LINK_DUPLICATES_ONE_ONLY
:
980 if (sec
->comdat
== NULL
)
981 einfo (_("%P: %B: warning: ignoring duplicate section `%s'\n"),
984 einfo (_("%P: %B: warning: ignoring duplicate `%s'"
985 " section symbol `%s'\n"),
986 abfd
, name
, sec
->comdat
->name
);
989 case SEC_LINK_DUPLICATES_SAME_CONTENTS
:
990 /* FIXME: We should really dig out the contents of both
991 sections and memcmp them. The COFF/PE spec says that
992 the Microsoft linker does not implement this
993 correctly, so I'm not going to bother doing it
996 case SEC_LINK_DUPLICATES_SAME_SIZE
:
997 if (sec
->size
!= l
->sec
->size
)
998 einfo (_("%P: %B: warning: duplicate section `%s'"
999 " has different size\n"),
1004 /* Set the output_section field so that lang_add_section
1005 does not create a lang_input_section structure for this
1006 section. Since there might be a symbol in the section
1007 being discarded, we must retain a pointer to the section
1008 which we are really going to use. */
1009 sec
->output_section
= bfd_abs_section_ptr
;
1010 sec
->kept_section
= l
->sec
;
1012 if (flags
& SEC_GROUP
)
1013 bfd_discard_group (abfd
, sec
);
1019 /* This is the first section with this name. Record it. Allocate
1020 the memory from the same obstack as the hash table is kept in. */
1022 l
= bfd_hash_allocate (&already_linked_table
, sizeof *l
);
1025 l
->next
= already_linked_list
->entry
;
1026 already_linked_list
->entry
= l
;
1029 /* Support routines for the hash table used by section_already_linked,
1030 initialize the table, fill in an entry and remove the table. */
1032 static struct bfd_hash_entry
*
1033 already_linked_newfunc (struct bfd_hash_entry
*entry ATTRIBUTE_UNUSED
,
1034 struct bfd_hash_table
*table
,
1035 const char *string ATTRIBUTE_UNUSED
)
1037 struct already_linked_hash_entry
*ret
=
1038 bfd_hash_allocate (table
, sizeof (struct already_linked_hash_entry
));
1046 already_linked_table_init (void)
1048 if (! bfd_hash_table_init_n (&already_linked_table
,
1049 already_linked_newfunc
,
1051 einfo (_("%P%F: Failed to create hash table\n"));
1055 already_linked_table_free (void)
1057 bfd_hash_table_free (&already_linked_table
);
1060 /* The wild routines.
1062 These expand statements like *(.text) and foo.o to a list of
1063 explicit actions, like foo.o(.text), bar.o(.text) and
1064 foo.o(.text, .data). */
1066 /* Return TRUE if the PATTERN argument is a wildcard pattern.
1067 Although backslashes are treated specially if a pattern contains
1068 wildcards, we do not consider the mere presence of a backslash to
1069 be enough to cause the pattern to be treated as a wildcard.
1070 That lets us handle DOS filenames more naturally. */
1073 wildcardp (const char *pattern
)
1077 for (s
= pattern
; *s
!= '\0'; ++s
)
1085 /* Add SECTION to the output section OUTPUT. Do this by creating a
1086 lang_input_section statement which is placed at PTR. FILE is the
1087 input file which holds SECTION. */
1090 lang_add_section (lang_statement_list_type
*ptr
,
1092 lang_output_section_statement_type
*output
,
1093 lang_input_statement_type
*file
)
1095 flagword flags
= section
->flags
;
1096 bfd_boolean discard
;
1098 /* Discard sections marked with SEC_EXCLUDE. */
1099 discard
= (flags
& SEC_EXCLUDE
) != 0;
1101 /* Discard input sections which are assigned to a section named
1102 DISCARD_SECTION_NAME. */
1103 if (strcmp (output
->name
, DISCARD_SECTION_NAME
) == 0)
1106 /* Discard debugging sections if we are stripping debugging
1108 if ((link_info
.strip
== strip_debugger
|| link_info
.strip
== strip_all
)
1109 && (flags
& SEC_DEBUGGING
) != 0)
1114 if (section
->output_section
== NULL
)
1116 /* This prevents future calls from assigning this section. */
1117 section
->output_section
= bfd_abs_section_ptr
;
1122 if (section
->output_section
== NULL
)
1125 lang_input_section_type
*new;
1128 if (output
->bfd_section
== NULL
)
1131 first
= ! output
->bfd_section
->linker_has_input
;
1132 output
->bfd_section
->linker_has_input
= 1;
1134 /* Add a section reference to the list. */
1135 new = new_stat (lang_input_section
, ptr
);
1137 new->section
= section
;
1139 section
->output_section
= output
->bfd_section
;
1141 flags
= section
->flags
;
1143 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1144 to an output section, because we want to be able to include a
1145 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1146 section (I don't know why we want to do this, but we do).
1147 build_link_order in ldwrite.c handles this case by turning
1148 the embedded SEC_NEVER_LOAD section into a fill. */
1150 flags
&= ~ SEC_NEVER_LOAD
;
1152 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1153 already been processed. One reason to do this is that on pe
1154 format targets, .text$foo sections go into .text and it's odd
1155 to see .text with SEC_LINK_ONCE set. */
1157 if (! link_info
.relocatable
)
1158 flags
&= ~ (SEC_LINK_ONCE
| SEC_LINK_DUPLICATES
);
1160 /* If this is not the first input section, and the SEC_READONLY
1161 flag is not currently set, then don't set it just because the
1162 input section has it set. */
1164 if (! first
&& (section
->output_section
->flags
& SEC_READONLY
) == 0)
1165 flags
&= ~ SEC_READONLY
;
1167 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1169 && ((section
->output_section
->flags
& (SEC_MERGE
| SEC_STRINGS
))
1170 != (flags
& (SEC_MERGE
| SEC_STRINGS
))
1171 || ((flags
& SEC_MERGE
)
1172 && section
->output_section
->entsize
!= section
->entsize
)))
1174 section
->output_section
->flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1175 flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1178 section
->output_section
->flags
|= flags
;
1180 if (flags
& SEC_MERGE
)
1181 section
->output_section
->entsize
= section
->entsize
;
1183 /* If SEC_READONLY is not set in the input section, then clear
1184 it from the output section. */
1185 if ((section
->flags
& SEC_READONLY
) == 0)
1186 section
->output_section
->flags
&= ~SEC_READONLY
;
1188 switch (output
->sectype
)
1190 case normal_section
:
1195 case overlay_section
:
1196 output
->bfd_section
->flags
&= ~SEC_ALLOC
;
1198 case noload_section
:
1199 output
->bfd_section
->flags
&= ~SEC_LOAD
;
1200 output
->bfd_section
->flags
|= SEC_NEVER_LOAD
;
1204 /* Copy over SEC_SMALL_DATA. */
1205 if (section
->flags
& SEC_SMALL_DATA
)
1206 section
->output_section
->flags
|= SEC_SMALL_DATA
;
1208 if (section
->alignment_power
> output
->bfd_section
->alignment_power
)
1209 output
->bfd_section
->alignment_power
= section
->alignment_power
;
1211 /* If supplied an alignment, then force it. */
1212 if (output
->section_alignment
!= -1)
1213 output
->bfd_section
->alignment_power
= output
->section_alignment
;
1215 if (section
->flags
& SEC_BLOCK
)
1217 section
->output_section
->flags
|= SEC_BLOCK
;
1218 /* FIXME: This value should really be obtained from the bfd... */
1219 output
->block_value
= 128;
1224 /* Handle wildcard sorting. This returns the lang_input_section which
1225 should follow the one we are going to create for SECTION and FILE,
1226 based on the sorting requirements of WILD. It returns NULL if the
1227 new section should just go at the end of the current list. */
1229 static lang_statement_union_type
*
1230 wild_sort (lang_wild_statement_type
*wild
,
1231 struct wildcard_list
*sec
,
1232 lang_input_statement_type
*file
,
1235 const char *section_name
;
1236 lang_statement_union_type
*l
;
1238 if (!wild
->filenames_sorted
&& (sec
== NULL
|| !sec
->spec
.sorted
))
1241 section_name
= bfd_get_section_name (file
->the_bfd
, section
);
1242 for (l
= wild
->children
.head
; l
!= NULL
; l
= l
->header
.next
)
1244 lang_input_section_type
*ls
;
1246 if (l
->header
.type
!= lang_input_section_enum
)
1248 ls
= &l
->input_section
;
1250 /* Sorting by filename takes precedence over sorting by section
1253 if (wild
->filenames_sorted
)
1255 const char *fn
, *ln
;
1259 /* The PE support for the .idata section as generated by
1260 dlltool assumes that files will be sorted by the name of
1261 the archive and then the name of the file within the
1264 if (file
->the_bfd
!= NULL
1265 && bfd_my_archive (file
->the_bfd
) != NULL
)
1267 fn
= bfd_get_filename (bfd_my_archive (file
->the_bfd
));
1272 fn
= file
->filename
;
1276 if (ls
->ifile
->the_bfd
!= NULL
1277 && bfd_my_archive (ls
->ifile
->the_bfd
) != NULL
)
1279 ln
= bfd_get_filename (bfd_my_archive (ls
->ifile
->the_bfd
));
1284 ln
= ls
->ifile
->filename
;
1288 i
= strcmp (fn
, ln
);
1297 fn
= file
->filename
;
1299 ln
= ls
->ifile
->filename
;
1301 i
= strcmp (fn
, ln
);
1309 /* Here either the files are not sorted by name, or we are
1310 looking at the sections for this file. */
1312 if (sec
!= NULL
&& sec
->spec
.sorted
)
1314 if (strcmp (section_name
,
1315 bfd_get_section_name (ls
->ifile
->the_bfd
,
1325 /* Expand a wild statement for a particular FILE. SECTION may be
1326 NULL, in which case it is a wild card. */
1329 output_section_callback (lang_wild_statement_type
*ptr
,
1330 struct wildcard_list
*sec
,
1332 lang_input_statement_type
*file
,
1335 lang_statement_union_type
*before
;
1337 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1338 if (unique_section_p (section
))
1341 before
= wild_sort (ptr
, sec
, file
, section
);
1343 /* Here BEFORE points to the lang_input_section which
1344 should follow the one we are about to add. If BEFORE
1345 is NULL, then the section should just go at the end
1346 of the current list. */
1349 lang_add_section (&ptr
->children
, section
,
1350 (lang_output_section_statement_type
*) output
,
1354 lang_statement_list_type list
;
1355 lang_statement_union_type
**pp
;
1357 lang_list_init (&list
);
1358 lang_add_section (&list
, section
,
1359 (lang_output_section_statement_type
*) output
,
1362 /* If we are discarding the section, LIST.HEAD will
1364 if (list
.head
!= NULL
)
1366 ASSERT (list
.head
->header
.next
== NULL
);
1368 for (pp
= &ptr
->children
.head
;
1370 pp
= &(*pp
)->header
.next
)
1371 ASSERT (*pp
!= NULL
);
1373 list
.head
->header
.next
= *pp
;
1379 /* Check if all sections in a wild statement for a particular FILE
1383 check_section_callback (lang_wild_statement_type
*ptr ATTRIBUTE_UNUSED
,
1384 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
1386 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
1389 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1390 if (unique_section_p (section
))
1393 if (section
->output_section
== NULL
&& (section
->flags
& SEC_READONLY
) == 0)
1394 ((lang_output_section_statement_type
*) data
)->all_input_readonly
= FALSE
;
1397 /* This is passed a file name which must have been seen already and
1398 added to the statement tree. We will see if it has been opened
1399 already and had its symbols read. If not then we'll read it. */
1401 static lang_input_statement_type
*
1402 lookup_name (const char *name
)
1404 lang_input_statement_type
*search
;
1406 for (search
= (lang_input_statement_type
*) input_file_chain
.head
;
1408 search
= (lang_input_statement_type
*) search
->next_real_file
)
1410 /* Use the local_sym_name as the name of the file that has
1411 already been loaded as filename might have been transformed
1412 via the search directory lookup mechanism. */
1413 const char * filename
= search
->local_sym_name
;
1415 if (filename
== NULL
&& name
== NULL
)
1417 if (filename
!= NULL
1419 && strcmp (filename
, name
) == 0)
1424 search
= new_afile (name
, lang_input_file_is_search_file_enum
,
1425 default_target
, FALSE
);
1427 /* If we have already added this file, or this file is not real
1428 (FIXME: can that ever actually happen?) or the name is NULL
1429 (FIXME: can that ever actually happen?) don't add this file. */
1432 || search
->filename
== NULL
)
1435 if (! load_symbols (search
, NULL
))
1441 /* Get the symbols for an input file. */
1444 load_symbols (lang_input_statement_type
*entry
,
1445 lang_statement_list_type
*place
)
1452 ldfile_open_file (entry
);
1454 if (! bfd_check_format (entry
->the_bfd
, bfd_archive
)
1455 && ! bfd_check_format_matches (entry
->the_bfd
, bfd_object
, &matching
))
1458 lang_statement_list_type
*hold
;
1459 bfd_boolean bad_load
= TRUE
;
1460 bfd_boolean save_ldlang_sysrooted_script
;
1462 err
= bfd_get_error ();
1464 /* See if the emulation has some special knowledge. */
1465 if (ldemul_unrecognized_file (entry
))
1468 if (err
== bfd_error_file_ambiguously_recognized
)
1472 einfo (_("%B: file not recognized: %E\n"), entry
->the_bfd
);
1473 einfo (_("%B: matching formats:"), entry
->the_bfd
);
1474 for (p
= matching
; *p
!= NULL
; p
++)
1478 else if (err
!= bfd_error_file_not_recognized
1480 einfo (_("%F%B: file not recognized: %E\n"), entry
->the_bfd
);
1484 bfd_close (entry
->the_bfd
);
1485 entry
->the_bfd
= NULL
;
1487 /* Try to interpret the file as a linker script. */
1488 ldfile_open_command_file (entry
->filename
);
1492 save_ldlang_sysrooted_script
= ldlang_sysrooted_script
;
1493 ldlang_sysrooted_script
= entry
->sysrooted
;
1495 ldfile_assumed_script
= TRUE
;
1496 parser_input
= input_script
;
1498 ldfile_assumed_script
= FALSE
;
1500 ldlang_sysrooted_script
= save_ldlang_sysrooted_script
;
1506 if (ldemul_recognized_file (entry
))
1509 /* We don't call ldlang_add_file for an archive. Instead, the
1510 add_symbols entry point will call ldlang_add_file, via the
1511 add_archive_element callback, for each element of the archive
1513 switch (bfd_get_format (entry
->the_bfd
))
1519 ldlang_add_file (entry
);
1520 if (trace_files
|| trace_file_tries
)
1521 info_msg ("%I\n", entry
);
1525 if (entry
->whole_archive
)
1528 bfd_boolean loaded
= TRUE
;
1532 member
= bfd_openr_next_archived_file (entry
->the_bfd
, member
);
1537 if (! bfd_check_format (member
, bfd_object
))
1539 einfo (_("%F%B: member %B in archive is not an object\n"),
1540 entry
->the_bfd
, member
);
1544 if (! ((*link_info
.callbacks
->add_archive_element
)
1545 (&link_info
, member
, "--whole-archive")))
1548 if (! bfd_link_add_symbols (member
, &link_info
))
1550 einfo (_("%F%B: could not read symbols: %E\n"), member
);
1555 entry
->loaded
= loaded
;
1561 if (bfd_link_add_symbols (entry
->the_bfd
, &link_info
))
1562 entry
->loaded
= TRUE
;
1564 einfo (_("%F%B: could not read symbols: %E\n"), entry
->the_bfd
);
1566 return entry
->loaded
;
1569 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
1570 may be NULL, indicating that it is a wildcard. Separate
1571 lang_input_section statements are created for each part of the
1572 expansion; they are added after the wild statement S. OUTPUT is
1573 the output section. */
1576 wild (lang_wild_statement_type
*s
,
1577 const char *target ATTRIBUTE_UNUSED
,
1578 lang_output_section_statement_type
*output
)
1580 struct wildcard_list
*sec
;
1582 walk_wild (s
, output_section_callback
, output
);
1584 for (sec
= s
->section_list
; sec
!= NULL
; sec
= sec
->next
)
1586 if (default_common_section
!= NULL
)
1588 if (sec
->spec
.name
!= NULL
&& strcmp (sec
->spec
.name
, "COMMON") == 0)
1590 /* Remember the section that common is going to in case we
1591 later get something which doesn't know where to put it. */
1592 default_common_section
= output
;
1597 /* Return TRUE iff target is the sought target. */
1600 get_target (const bfd_target
*target
, void *data
)
1602 const char *sought
= data
;
1604 return strcmp (target
->name
, sought
) == 0;
1607 /* Like strcpy() but convert to lower case as well. */
1610 stricpy (char *dest
, char *src
)
1614 while ((c
= *src
++) != 0)
1615 *dest
++ = TOLOWER (c
);
1620 /* Remove the first occurrence of needle (if any) in haystack
1624 strcut (char *haystack
, char *needle
)
1626 haystack
= strstr (haystack
, needle
);
1632 for (src
= haystack
+ strlen (needle
); *src
;)
1633 *haystack
++ = *src
++;
1639 /* Compare two target format name strings.
1640 Return a value indicating how "similar" they are. */
1643 name_compare (char *first
, char *second
)
1649 copy1
= xmalloc (strlen (first
) + 1);
1650 copy2
= xmalloc (strlen (second
) + 1);
1652 /* Convert the names to lower case. */
1653 stricpy (copy1
, first
);
1654 stricpy (copy2
, second
);
1656 /* Remove size and endian strings from the name. */
1657 strcut (copy1
, "big");
1658 strcut (copy1
, "little");
1659 strcut (copy2
, "big");
1660 strcut (copy2
, "little");
1662 /* Return a value based on how many characters match,
1663 starting from the beginning. If both strings are
1664 the same then return 10 * their length. */
1665 for (result
= 0; copy1
[result
] == copy2
[result
]; result
++)
1666 if (copy1
[result
] == 0)
1678 /* Set by closest_target_match() below. */
1679 static const bfd_target
*winner
;
1681 /* Scan all the valid bfd targets looking for one that has the endianness
1682 requirement that was specified on the command line, and is the nearest
1683 match to the original output target. */
1686 closest_target_match (const bfd_target
*target
, void *data
)
1688 const bfd_target
*original
= data
;
1690 if (command_line
.endian
== ENDIAN_BIG
1691 && target
->byteorder
!= BFD_ENDIAN_BIG
)
1694 if (command_line
.endian
== ENDIAN_LITTLE
1695 && target
->byteorder
!= BFD_ENDIAN_LITTLE
)
1698 /* Must be the same flavour. */
1699 if (target
->flavour
!= original
->flavour
)
1702 /* If we have not found a potential winner yet, then record this one. */
1709 /* Oh dear, we now have two potential candidates for a successful match.
1710 Compare their names and choose the better one. */
1711 if (name_compare (target
->name
, original
->name
)
1712 > name_compare (winner
->name
, original
->name
))
1715 /* Keep on searching until wqe have checked them all. */
1719 /* Return the BFD target format of the first input file. */
1722 get_first_input_target (void)
1724 char *target
= NULL
;
1726 LANG_FOR_EACH_INPUT_STATEMENT (s
)
1728 if (s
->header
.type
== lang_input_statement_enum
1731 ldfile_open_file (s
);
1733 if (s
->the_bfd
!= NULL
1734 && bfd_check_format (s
->the_bfd
, bfd_object
))
1736 target
= bfd_get_target (s
->the_bfd
);
1748 lang_get_output_target (void)
1752 /* Has the user told us which output format to use? */
1753 if (output_target
!= NULL
)
1754 return output_target
;
1756 /* No - has the current target been set to something other than
1758 if (current_target
!= default_target
)
1759 return current_target
;
1761 /* No - can we determine the format of the first input file? */
1762 target
= get_first_input_target ();
1766 /* Failed - use the default output target. */
1767 return default_target
;
1770 /* Open the output file. */
1773 open_output (const char *name
)
1777 output_target
= lang_get_output_target ();
1779 /* Has the user requested a particular endianness on the command
1781 if (command_line
.endian
!= ENDIAN_UNSET
)
1783 const bfd_target
*target
;
1784 enum bfd_endian desired_endian
;
1786 /* Get the chosen target. */
1787 target
= bfd_search_for_target (get_target
, (void *) output_target
);
1789 /* If the target is not supported, we cannot do anything. */
1792 if (command_line
.endian
== ENDIAN_BIG
)
1793 desired_endian
= BFD_ENDIAN_BIG
;
1795 desired_endian
= BFD_ENDIAN_LITTLE
;
1797 /* See if the target has the wrong endianness. This should
1798 not happen if the linker script has provided big and
1799 little endian alternatives, but some scrips don't do
1801 if (target
->byteorder
!= desired_endian
)
1803 /* If it does, then see if the target provides
1804 an alternative with the correct endianness. */
1805 if (target
->alternative_target
!= NULL
1806 && (target
->alternative_target
->byteorder
== desired_endian
))
1807 output_target
= target
->alternative_target
->name
;
1810 /* Try to find a target as similar as possible to
1811 the default target, but which has the desired
1812 endian characteristic. */
1813 bfd_search_for_target (closest_target_match
,
1816 /* Oh dear - we could not find any targets that
1817 satisfy our requirements. */
1819 einfo (_("%P: warning: could not find any targets"
1820 " that match endianness requirement\n"));
1822 output_target
= winner
->name
;
1828 output
= bfd_openw (name
, output_target
);
1832 if (bfd_get_error () == bfd_error_invalid_target
)
1833 einfo (_("%P%F: target %s not found\n"), output_target
);
1835 einfo (_("%P%F: cannot open output file %s: %E\n"), name
);
1838 delete_output_file_on_failure
= TRUE
;
1841 output
->flags
|= D_PAGED
;
1844 if (! bfd_set_format (output
, bfd_object
))
1845 einfo (_("%P%F:%s: can not make object file: %E\n"), name
);
1846 if (! bfd_set_arch_mach (output
,
1847 ldfile_output_architecture
,
1848 ldfile_output_machine
))
1849 einfo (_("%P%F:%s: can not set architecture: %E\n"), name
);
1851 link_info
.hash
= bfd_link_hash_table_create (output
);
1852 if (link_info
.hash
== NULL
)
1853 einfo (_("%P%F: can not create link hash table: %E\n"));
1855 bfd_set_gp_size (output
, g_switch_value
);
1860 ldlang_open_output (lang_statement_union_type
*statement
)
1862 switch (statement
->header
.type
)
1864 case lang_output_statement_enum
:
1865 ASSERT (output_bfd
== NULL
);
1866 output_bfd
= open_output (statement
->output_statement
.name
);
1867 ldemul_set_output_arch ();
1868 if (config
.magic_demand_paged
&& !link_info
.relocatable
)
1869 output_bfd
->flags
|= D_PAGED
;
1871 output_bfd
->flags
&= ~D_PAGED
;
1872 if (config
.text_read_only
)
1873 output_bfd
->flags
|= WP_TEXT
;
1875 output_bfd
->flags
&= ~WP_TEXT
;
1876 if (link_info
.traditional_format
)
1877 output_bfd
->flags
|= BFD_TRADITIONAL_FORMAT
;
1879 output_bfd
->flags
&= ~BFD_TRADITIONAL_FORMAT
;
1882 case lang_target_statement_enum
:
1883 current_target
= statement
->target_statement
.target
;
1890 /* Convert between addresses in bytes and sizes in octets.
1891 For currently supported targets, octets_per_byte is always a power
1892 of two, so we can use shifts. */
1893 #define TO_ADDR(X) ((X) >> opb_shift)
1894 #define TO_SIZE(X) ((X) << opb_shift)
1896 /* Support the above. */
1897 static unsigned int opb_shift
= 0;
1902 unsigned x
= bfd_arch_mach_octets_per_byte (ldfile_output_architecture
,
1903 ldfile_output_machine
);
1906 while ((x
& 1) == 0)
1914 /* Open all the input files. */
1917 open_input_bfds (lang_statement_union_type
*s
, bfd_boolean force
)
1919 for (; s
!= NULL
; s
= s
->header
.next
)
1921 switch (s
->header
.type
)
1923 case lang_constructors_statement_enum
:
1924 open_input_bfds (constructor_list
.head
, force
);
1926 case lang_output_section_statement_enum
:
1927 open_input_bfds (s
->output_section_statement
.children
.head
, force
);
1929 case lang_wild_statement_enum
:
1930 /* Maybe we should load the file's symbols. */
1931 if (s
->wild_statement
.filename
1932 && ! wildcardp (s
->wild_statement
.filename
))
1933 lookup_name (s
->wild_statement
.filename
);
1934 open_input_bfds (s
->wild_statement
.children
.head
, force
);
1936 case lang_group_statement_enum
:
1938 struct bfd_link_hash_entry
*undefs
;
1940 /* We must continually search the entries in the group
1941 until no new symbols are added to the list of undefined
1946 undefs
= link_info
.hash
->undefs_tail
;
1947 open_input_bfds (s
->group_statement
.children
.head
, TRUE
);
1949 while (undefs
!= link_info
.hash
->undefs_tail
);
1952 case lang_target_statement_enum
:
1953 current_target
= s
->target_statement
.target
;
1955 case lang_input_statement_enum
:
1956 if (s
->input_statement
.real
)
1958 lang_statement_list_type add
;
1960 s
->input_statement
.target
= current_target
;
1962 /* If we are being called from within a group, and this
1963 is an archive which has already been searched, then
1964 force it to be researched unless the whole archive
1965 has been loaded already. */
1967 && !s
->input_statement
.whole_archive
1968 && s
->input_statement
.loaded
1969 && bfd_check_format (s
->input_statement
.the_bfd
,
1971 s
->input_statement
.loaded
= FALSE
;
1973 lang_list_init (&add
);
1975 if (! load_symbols (&s
->input_statement
, &add
))
1976 config
.make_executable
= FALSE
;
1978 if (add
.head
!= NULL
)
1980 *add
.tail
= s
->header
.next
;
1981 s
->header
.next
= add
.head
;
1991 /* If there are [COMMONS] statements, put a wild one into the bss
1995 lang_reasonable_defaults (void)
1998 lang_output_section_statement_lookup (".text");
1999 lang_output_section_statement_lookup (".data");
2001 default_common_section
= lang_output_section_statement_lookup (".bss");
2003 if (!placed_commons
)
2005 lang_wild_statement_type
*new =
2006 new_stat (lang_wild_statement
,
2007 &default_common_section
->children
);
2009 new->section_name
= "COMMON";
2010 new->filename
= NULL
;
2011 lang_list_init (&new->children
);
2016 /* Add a symbol to a hash of symbols used in DEFINED (NAME) expressions. */
2019 lang_track_definedness (const char *name
)
2021 if (bfd_hash_lookup (&lang_definedness_table
, name
, TRUE
, FALSE
) == NULL
)
2022 einfo (_("%P%F: bfd_hash_lookup failed creating symbol %s\n"), name
);
2025 /* New-function for the definedness hash table. */
2027 static struct bfd_hash_entry
*
2028 lang_definedness_newfunc (struct bfd_hash_entry
*entry
,
2029 struct bfd_hash_table
*table ATTRIBUTE_UNUSED
,
2030 const char *name ATTRIBUTE_UNUSED
)
2032 struct lang_definedness_hash_entry
*ret
2033 = (struct lang_definedness_hash_entry
*) entry
;
2036 ret
= (struct lang_definedness_hash_entry
*)
2037 bfd_hash_allocate (table
, sizeof (struct lang_definedness_hash_entry
));
2040 einfo (_("%P%F: bfd_hash_allocate failed creating symbol %s\n"), name
);
2042 ret
->iteration
= -1;
2046 /* Return the iteration when the definition of NAME was last updated. A
2047 value of -1 means that the symbol is not defined in the linker script
2048 or the command line, but may be defined in the linker symbol table. */
2051 lang_symbol_definition_iteration (const char *name
)
2053 struct lang_definedness_hash_entry
*defentry
2054 = (struct lang_definedness_hash_entry
*)
2055 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2057 /* We've already created this one on the presence of DEFINED in the
2058 script, so it can't be NULL unless something is borked elsewhere in
2060 if (defentry
== NULL
)
2063 return defentry
->iteration
;
2066 /* Update the definedness state of NAME. */
2069 lang_update_definedness (const char *name
, struct bfd_link_hash_entry
*h
)
2071 struct lang_definedness_hash_entry
*defentry
2072 = (struct lang_definedness_hash_entry
*)
2073 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2075 /* We don't keep track of symbols not tested with DEFINED. */
2076 if (defentry
== NULL
)
2079 /* If the symbol was already defined, and not from an earlier statement
2080 iteration, don't update the definedness iteration, because that'd
2081 make the symbol seem defined in the linker script at this point, and
2082 it wasn't; it was defined in some object. If we do anyway, DEFINED
2083 would start to yield false before this point and the construct "sym =
2084 DEFINED (sym) ? sym : X;" would change sym to X despite being defined
2086 if (h
->type
!= bfd_link_hash_undefined
2087 && h
->type
!= bfd_link_hash_common
2088 && h
->type
!= bfd_link_hash_new
2089 && defentry
->iteration
== -1)
2092 defentry
->iteration
= lang_statement_iteration
;
2095 /* Add the supplied name to the symbol table as an undefined reference.
2096 This is a two step process as the symbol table doesn't even exist at
2097 the time the ld command line is processed. First we put the name
2098 on a list, then, once the output file has been opened, transfer the
2099 name to the symbol table. */
2101 typedef struct bfd_sym_chain ldlang_undef_chain_list_type
;
2103 #define ldlang_undef_chain_list_head entry_symbol.next
2106 ldlang_add_undef (const char *const name
)
2108 ldlang_undef_chain_list_type
*new =
2109 stat_alloc (sizeof (ldlang_undef_chain_list_type
));
2111 new->next
= ldlang_undef_chain_list_head
;
2112 ldlang_undef_chain_list_head
= new;
2114 new->name
= xstrdup (name
);
2116 if (output_bfd
!= NULL
)
2117 insert_undefined (new->name
);
2120 /* Insert NAME as undefined in the symbol table. */
2123 insert_undefined (const char *name
)
2125 struct bfd_link_hash_entry
*h
;
2127 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, FALSE
, TRUE
);
2129 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2130 if (h
->type
== bfd_link_hash_new
)
2132 h
->type
= bfd_link_hash_undefined
;
2133 h
->u
.undef
.abfd
= NULL
;
2134 bfd_link_add_undef (link_info
.hash
, h
);
2138 /* Run through the list of undefineds created above and place them
2139 into the linker hash table as undefined symbols belonging to the
2143 lang_place_undefineds (void)
2145 ldlang_undef_chain_list_type
*ptr
;
2147 for (ptr
= ldlang_undef_chain_list_head
; ptr
!= NULL
; ptr
= ptr
->next
)
2148 insert_undefined (ptr
->name
);
2151 /* Check for all readonly or some readwrite sections. */
2154 check_input_sections
2155 (lang_statement_union_type
*s
,
2156 lang_output_section_statement_type
*output_section_statement
)
2158 for (; s
!= (lang_statement_union_type
*) NULL
; s
= s
->header
.next
)
2160 switch (s
->header
.type
)
2162 case lang_wild_statement_enum
:
2163 walk_wild (&s
->wild_statement
, check_section_callback
,
2164 output_section_statement
);
2165 if (! output_section_statement
->all_input_readonly
)
2168 case lang_constructors_statement_enum
:
2169 check_input_sections (constructor_list
.head
,
2170 output_section_statement
);
2171 if (! output_section_statement
->all_input_readonly
)
2174 case lang_group_statement_enum
:
2175 check_input_sections (s
->group_statement
.children
.head
,
2176 output_section_statement
);
2177 if (! output_section_statement
->all_input_readonly
)
2186 /* Open input files and attach to output sections. */
2189 map_input_to_output_sections
2190 (lang_statement_union_type
*s
, const char *target
,
2191 lang_output_section_statement_type
*output_section_statement
)
2193 for (; s
!= NULL
; s
= s
->header
.next
)
2195 switch (s
->header
.type
)
2197 case lang_wild_statement_enum
:
2198 wild (&s
->wild_statement
, target
, output_section_statement
);
2200 case lang_constructors_statement_enum
:
2201 map_input_to_output_sections (constructor_list
.head
,
2203 output_section_statement
);
2205 case lang_output_section_statement_enum
:
2206 if (s
->output_section_statement
.constraint
)
2208 if (s
->output_section_statement
.constraint
== -1)
2210 s
->output_section_statement
.all_input_readonly
= TRUE
;
2211 check_input_sections (s
->output_section_statement
.children
.head
,
2212 &s
->output_section_statement
);
2213 if ((s
->output_section_statement
.all_input_readonly
2214 && s
->output_section_statement
.constraint
== ONLY_IF_RW
)
2215 || (!s
->output_section_statement
.all_input_readonly
2216 && s
->output_section_statement
.constraint
== ONLY_IF_RO
))
2218 s
->output_section_statement
.constraint
= -1;
2223 map_input_to_output_sections (s
->output_section_statement
.children
.head
,
2225 &s
->output_section_statement
);
2227 case lang_output_statement_enum
:
2229 case lang_target_statement_enum
:
2230 target
= s
->target_statement
.target
;
2232 case lang_group_statement_enum
:
2233 map_input_to_output_sections (s
->group_statement
.children
.head
,
2235 output_section_statement
);
2237 case lang_data_statement_enum
:
2238 /* Make sure that any sections mentioned in the expression
2240 exp_init_os (s
->data_statement
.exp
);
2242 case lang_fill_statement_enum
:
2243 case lang_input_section_enum
:
2244 case lang_object_symbols_statement_enum
:
2245 case lang_reloc_statement_enum
:
2246 case lang_padding_statement_enum
:
2247 case lang_input_statement_enum
:
2248 if (output_section_statement
!= NULL
2249 && output_section_statement
->bfd_section
== NULL
)
2250 init_os (output_section_statement
);
2252 case lang_assignment_statement_enum
:
2253 if (output_section_statement
!= NULL
2254 && output_section_statement
->bfd_section
== NULL
)
2255 init_os (output_section_statement
);
2257 /* Make sure that any sections mentioned in the assignment
2259 exp_init_os (s
->assignment_statement
.exp
);
2261 case lang_afile_asection_pair_statement_enum
:
2264 case lang_address_statement_enum
:
2265 /* Mark the specified section with the supplied address. */
2267 lang_output_section_statement_type
*os
=
2268 lang_output_section_statement_lookup
2269 (s
->address_statement
.section_name
);
2271 if (os
->bfd_section
== NULL
)
2273 os
->addr_tree
= s
->address_statement
.address
;
2280 /* An output section might have been removed after its statement was
2281 added. For example, ldemul_before_allocation can remove dynamic
2282 sections if they turn out to be not needed. Clean them up here. */
2285 strip_excluded_output_sections (void)
2287 lang_statement_union_type
*u
;
2289 for (u
= lang_output_section_statement
.head
;
2291 u
= u
->output_section_statement
.next
)
2293 lang_output_section_statement_type
*os
;
2296 os
= &u
->output_section_statement
;
2297 if (os
->constraint
== -1)
2299 s
= os
->bfd_section
;
2300 if (s
!= NULL
&& (s
->flags
& SEC_EXCLUDE
) != 0)
2304 os
->bfd_section
= NULL
;
2306 for (p
= &output_bfd
->sections
; *p
; p
= &(*p
)->next
)
2309 bfd_section_list_remove (output_bfd
, p
);
2310 output_bfd
->section_count
--;
2318 print_output_section_statement
2319 (lang_output_section_statement_type
*output_section_statement
)
2321 asection
*section
= output_section_statement
->bfd_section
;
2324 if (output_section_statement
!= abs_output_section
)
2326 minfo ("\n%s", output_section_statement
->name
);
2328 if (section
!= NULL
)
2330 print_dot
= section
->vma
;
2332 len
= strlen (output_section_statement
->name
);
2333 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
2338 while (len
< SECTION_NAME_MAP_LENGTH
)
2344 minfo ("0x%V %W", section
->vma
, section
->size
);
2346 if (output_section_statement
->load_base
!= NULL
)
2350 addr
= exp_get_abs_int (output_section_statement
->load_base
, 0,
2351 "load base", lang_final_phase_enum
);
2352 minfo (_(" load address 0x%V"), addr
);
2359 print_statement_list (output_section_statement
->children
.head
,
2360 output_section_statement
);
2364 print_assignment (lang_assignment_statement_type
*assignment
,
2365 lang_output_section_statement_type
*output_section
)
2368 etree_value_type result
;
2370 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
2373 result
= exp_fold_tree (assignment
->exp
->assign
.src
, output_section
,
2374 lang_final_phase_enum
, print_dot
, &print_dot
);
2380 value
= result
.value
+ result
.section
->bfd_section
->vma
;
2381 dst
= assignment
->exp
->assign
.dst
;
2383 minfo ("0x%V", value
);
2384 if (dst
[0] == '.' && dst
[1] == 0)
2397 exp_print_tree (assignment
->exp
);
2403 print_input_statement (lang_input_statement_type
*statm
)
2405 if (statm
->filename
!= NULL
)
2407 fprintf (config
.map_file
, "LOAD %s\n", statm
->filename
);
2411 /* Print all symbols defined in a particular section. This is called
2412 via bfd_link_hash_traverse, or by print_all_symbols. */
2415 print_one_symbol (struct bfd_link_hash_entry
*hash_entry
, void *ptr
)
2417 asection
*sec
= ptr
;
2419 if ((hash_entry
->type
== bfd_link_hash_defined
2420 || hash_entry
->type
== bfd_link_hash_defweak
)
2421 && sec
== hash_entry
->u
.def
.section
)
2425 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
2428 (hash_entry
->u
.def
.value
2429 + hash_entry
->u
.def
.section
->output_offset
2430 + hash_entry
->u
.def
.section
->output_section
->vma
));
2432 minfo (" %T\n", hash_entry
->root
.string
);
2439 print_all_symbols (sec
)
2442 struct fat_user_section_struct
*ud
= get_userdata (sec
);
2443 struct map_symbol_def
*def
;
2445 *ud
->map_symbol_def_tail
= 0;
2446 for (def
= ud
->map_symbol_def_head
; def
; def
= def
->next
)
2447 print_one_symbol (def
->entry
, sec
);
2450 /* Print information about an input section to the map file. */
2453 print_input_section (lang_input_section_type
*in
)
2455 asection
*i
= in
->section
;
2456 bfd_size_type size
= i
->size
;
2465 minfo ("%s", i
->name
);
2467 len
= 1 + strlen (i
->name
);
2468 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
2473 while (len
< SECTION_NAME_MAP_LENGTH
)
2479 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
2480 addr
= i
->output_section
->vma
+ i
->output_offset
;
2487 minfo ("0x%V %W %B\n", addr
, TO_ADDR (size
), i
->owner
);
2489 if (size
!= i
->rawsize
&& i
->rawsize
!= 0)
2491 len
= SECTION_NAME_MAP_LENGTH
+ 3;
2503 minfo (_("%W (size before relaxing)\n"), i
->rawsize
);
2506 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
2508 if (command_line
.reduce_memory_overheads
)
2509 bfd_link_hash_traverse (link_info
.hash
, print_one_symbol
, i
);
2511 print_all_symbols (i
);
2513 print_dot
= addr
+ TO_ADDR (size
);
2519 print_fill_statement (lang_fill_statement_type
*fill
)
2523 fputs (" FILL mask 0x", config
.map_file
);
2524 for (p
= fill
->fill
->data
, size
= fill
->fill
->size
; size
!= 0; p
++, size
--)
2525 fprintf (config
.map_file
, "%02x", *p
);
2526 fputs ("\n", config
.map_file
);
2530 print_data_statement (lang_data_statement_type
*data
)
2538 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
2541 addr
= data
->output_vma
;
2542 if (data
->output_section
!= NULL
)
2543 addr
+= data
->output_section
->vma
;
2571 minfo ("0x%V %W %s 0x%v", addr
, size
, name
, data
->value
);
2573 if (data
->exp
->type
.node_class
!= etree_value
)
2576 exp_print_tree (data
->exp
);
2581 print_dot
= addr
+ TO_ADDR (size
);
2584 /* Print an address statement. These are generated by options like
2588 print_address_statement (lang_address_statement_type
*address
)
2590 minfo (_("Address of section %s set to "), address
->section_name
);
2591 exp_print_tree (address
->address
);
2595 /* Print a reloc statement. */
2598 print_reloc_statement (lang_reloc_statement_type
*reloc
)
2605 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
2608 addr
= reloc
->output_vma
;
2609 if (reloc
->output_section
!= NULL
)
2610 addr
+= reloc
->output_section
->vma
;
2612 size
= bfd_get_reloc_size (reloc
->howto
);
2614 minfo ("0x%V %W RELOC %s ", addr
, size
, reloc
->howto
->name
);
2616 if (reloc
->name
!= NULL
)
2617 minfo ("%s+", reloc
->name
);
2619 minfo ("%s+", reloc
->section
->name
);
2621 exp_print_tree (reloc
->addend_exp
);
2625 print_dot
= addr
+ TO_ADDR (size
);
2629 print_padding_statement (lang_padding_statement_type
*s
)
2637 len
= sizeof " *fill*" - 1;
2638 while (len
< SECTION_NAME_MAP_LENGTH
)
2644 addr
= s
->output_offset
;
2645 if (s
->output_section
!= NULL
)
2646 addr
+= s
->output_section
->vma
;
2647 minfo ("0x%V %W ", addr
, (bfd_vma
) s
->size
);
2649 if (s
->fill
->size
!= 0)
2653 for (p
= s
->fill
->data
, size
= s
->fill
->size
; size
!= 0; p
++, size
--)
2654 fprintf (config
.map_file
, "%02x", *p
);
2659 print_dot
= addr
+ TO_ADDR (s
->size
);
2663 print_wild_statement (lang_wild_statement_type
*w
,
2664 lang_output_section_statement_type
*os
)
2666 struct wildcard_list
*sec
;
2670 if (w
->filenames_sorted
)
2672 if (w
->filename
!= NULL
)
2673 minfo ("%s", w
->filename
);
2676 if (w
->filenames_sorted
)
2680 for (sec
= w
->section_list
; sec
; sec
= sec
->next
)
2682 if (sec
->spec
.sorted
)
2684 if (sec
->spec
.exclude_name_list
!= NULL
)
2687 minfo ("EXCLUDE_FILE(%s", sec
->spec
.exclude_name_list
->name
);
2688 for (tmp
= sec
->spec
.exclude_name_list
->next
; tmp
; tmp
= tmp
->next
)
2689 minfo (" %s", tmp
->name
);
2692 if (sec
->spec
.name
!= NULL
)
2693 minfo ("%s", sec
->spec
.name
);
2696 if (sec
->spec
.sorted
)
2705 print_statement_list (w
->children
.head
, os
);
2708 /* Print a group statement. */
2711 print_group (lang_group_statement_type
*s
,
2712 lang_output_section_statement_type
*os
)
2714 fprintf (config
.map_file
, "START GROUP\n");
2715 print_statement_list (s
->children
.head
, os
);
2716 fprintf (config
.map_file
, "END GROUP\n");
2719 /* Print the list of statements in S.
2720 This can be called for any statement type. */
2723 print_statement_list (lang_statement_union_type
*s
,
2724 lang_output_section_statement_type
*os
)
2728 print_statement (s
, os
);
2733 /* Print the first statement in statement list S.
2734 This can be called for any statement type. */
2737 print_statement (lang_statement_union_type
*s
,
2738 lang_output_section_statement_type
*os
)
2740 switch (s
->header
.type
)
2743 fprintf (config
.map_file
, _("Fail with %d\n"), s
->header
.type
);
2746 case lang_constructors_statement_enum
:
2747 if (constructor_list
.head
!= NULL
)
2749 if (constructors_sorted
)
2750 minfo (" SORT (CONSTRUCTORS)\n");
2752 minfo (" CONSTRUCTORS\n");
2753 print_statement_list (constructor_list
.head
, os
);
2756 case lang_wild_statement_enum
:
2757 print_wild_statement (&s
->wild_statement
, os
);
2759 case lang_address_statement_enum
:
2760 print_address_statement (&s
->address_statement
);
2762 case lang_object_symbols_statement_enum
:
2763 minfo (" CREATE_OBJECT_SYMBOLS\n");
2765 case lang_fill_statement_enum
:
2766 print_fill_statement (&s
->fill_statement
);
2768 case lang_data_statement_enum
:
2769 print_data_statement (&s
->data_statement
);
2771 case lang_reloc_statement_enum
:
2772 print_reloc_statement (&s
->reloc_statement
);
2774 case lang_input_section_enum
:
2775 print_input_section (&s
->input_section
);
2777 case lang_padding_statement_enum
:
2778 print_padding_statement (&s
->padding_statement
);
2780 case lang_output_section_statement_enum
:
2781 print_output_section_statement (&s
->output_section_statement
);
2783 case lang_assignment_statement_enum
:
2784 print_assignment (&s
->assignment_statement
, os
);
2786 case lang_target_statement_enum
:
2787 fprintf (config
.map_file
, "TARGET(%s)\n", s
->target_statement
.target
);
2789 case lang_output_statement_enum
:
2790 minfo ("OUTPUT(%s", s
->output_statement
.name
);
2791 if (output_target
!= NULL
)
2792 minfo (" %s", output_target
);
2795 case lang_input_statement_enum
:
2796 print_input_statement (&s
->input_statement
);
2798 case lang_group_statement_enum
:
2799 print_group (&s
->group_statement
, os
);
2801 case lang_afile_asection_pair_statement_enum
:
2808 print_statements (void)
2810 print_statement_list (statement_list
.head
, abs_output_section
);
2813 /* Print the first N statements in statement list S to STDERR.
2814 If N == 0, nothing is printed.
2815 If N < 0, the entire list is printed.
2816 Intended to be called from GDB. */
2819 dprint_statement (lang_statement_union_type
*s
, int n
)
2821 FILE *map_save
= config
.map_file
;
2823 config
.map_file
= stderr
;
2826 print_statement_list (s
, abs_output_section
);
2829 while (s
&& --n
>= 0)
2831 print_statement (s
, abs_output_section
);
2836 config
.map_file
= map_save
;
2840 insert_pad (lang_statement_union_type
**ptr
,
2842 unsigned int alignment_needed
,
2843 asection
*output_section
,
2846 static fill_type zero_fill
= { 1, { 0 } };
2847 lang_statement_union_type
*pad
;
2849 pad
= ((lang_statement_union_type
*)
2850 ((char *) ptr
- offsetof (lang_statement_union_type
, header
.next
)));
2851 if (ptr
!= &statement_list
.head
2852 && pad
->header
.type
== lang_padding_statement_enum
2853 && pad
->padding_statement
.output_section
== output_section
)
2855 /* Use the existing pad statement. The above test on output
2856 section is probably redundant, but it doesn't hurt to check. */
2860 /* Make a new padding statement, linked into existing chain. */
2861 pad
= stat_alloc (sizeof (lang_padding_statement_type
));
2862 pad
->header
.next
= *ptr
;
2864 pad
->header
.type
= lang_padding_statement_enum
;
2865 pad
->padding_statement
.output_section
= output_section
;
2868 pad
->padding_statement
.fill
= fill
;
2870 pad
->padding_statement
.output_offset
= dot
- output_section
->vma
;
2871 pad
->padding_statement
.size
= alignment_needed
;
2872 output_section
->size
+= alignment_needed
;
2875 /* Work out how much this section will move the dot point. */
2879 (lang_statement_union_type
**this_ptr
,
2880 lang_output_section_statement_type
*output_section_statement
,
2884 lang_input_section_type
*is
= &((*this_ptr
)->input_section
);
2885 asection
*i
= is
->section
;
2887 if (!is
->ifile
->just_syms_flag
&& (i
->flags
& SEC_EXCLUDE
) == 0)
2889 unsigned int alignment_needed
;
2892 /* Align this section first to the input sections requirement,
2893 then to the output section's requirement. If this alignment
2894 is greater than any seen before, then record it too. Perform
2895 the alignment by inserting a magic 'padding' statement. */
2897 if (output_section_statement
->subsection_alignment
!= -1)
2898 i
->alignment_power
= output_section_statement
->subsection_alignment
;
2900 o
= output_section_statement
->bfd_section
;
2901 if (o
->alignment_power
< i
->alignment_power
)
2902 o
->alignment_power
= i
->alignment_power
;
2904 alignment_needed
= align_power (dot
, i
->alignment_power
) - dot
;
2906 if (alignment_needed
!= 0)
2908 insert_pad (this_ptr
, fill
, TO_SIZE (alignment_needed
), o
, dot
);
2909 dot
+= alignment_needed
;
2912 /* Remember where in the output section this input section goes. */
2914 i
->output_offset
= dot
- o
->vma
;
2916 /* Mark how big the output section must be to contain this now. */
2917 dot
+= TO_ADDR (i
->size
);
2918 o
->size
= TO_SIZE (dot
- o
->vma
);
2922 i
->output_offset
= i
->vma
- output_section_statement
->bfd_section
->vma
;
2928 #define IGNORE_SECTION(s) \
2929 (((s->flags & SEC_THREAD_LOCAL) != 0 \
2930 ? (s->flags & (SEC_LOAD | SEC_NEVER_LOAD)) != SEC_LOAD \
2931 : (s->flags & (SEC_ALLOC | SEC_NEVER_LOAD)) != SEC_ALLOC) \
2934 /* Check to see if any allocated sections overlap with other allocated
2935 sections. This can happen when the linker script specifically specifies
2936 the output section addresses of the two sections. */
2939 lang_check_section_addresses (void)
2943 /* Scan all sections in the output list. */
2944 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
2948 /* Ignore sections which are not loaded or which have no contents. */
2949 if (IGNORE_SECTION (s
))
2952 /* Once we reach section 's' stop our seach. This prevents two
2953 warning messages from being produced, one for 'section A overlaps
2954 section B' and one for 'section B overlaps section A'. */
2955 for (os
= output_bfd
->sections
; os
!= s
; os
= os
->next
)
2962 /* Only consider loadable sections with real contents. */
2963 if (IGNORE_SECTION (os
))
2966 /* We must check the sections' LMA addresses not their
2967 VMA addresses because overlay sections can have
2968 overlapping VMAs but they must have distinct LMAs. */
2969 s_start
= bfd_section_lma (output_bfd
, s
);
2970 os_start
= bfd_section_lma (output_bfd
, os
);
2971 s_end
= s_start
+ TO_ADDR (s
->size
) - 1;
2972 os_end
= os_start
+ TO_ADDR (os
->size
) - 1;
2974 /* Look for an overlap. */
2975 if ((s_end
< os_start
) || (s_start
> os_end
))
2979 _("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
2980 s
->name
, s_start
, s_end
, os
->name
, os_start
, os_end
);
2982 /* Once we have found one overlap for this section,
2983 stop looking for others. */
2989 /* Make sure the new address is within the region. We explicitly permit the
2990 current address to be at the exact end of the region when the address is
2991 non-zero, in case the region is at the end of addressable memory and the
2992 calculation wraps around. */
2995 os_region_check (lang_output_section_statement_type
*os
,
2996 lang_memory_region_type
*region
,
3000 if ((region
->current
< region
->origin
3001 || (region
->current
- region
->origin
> region
->length
))
3002 && ((region
->current
!= region
->origin
+ region
->length
)
3007 einfo (_("%X%P: address 0x%v of %B section %s"
3008 " is not within region %s\n"),
3010 os
->bfd_section
->owner
,
3011 os
->bfd_section
->name
,
3016 einfo (_("%X%P: region %s is full (%B section %s)\n"),
3018 os
->bfd_section
->owner
,
3019 os
->bfd_section
->name
);
3021 /* Reset the region pointer. */
3022 region
->current
= region
->origin
;
3026 /* Set the sizes for all the output sections. */
3029 lang_size_sections_1
3030 (lang_statement_union_type
*s
,
3031 lang_output_section_statement_type
*output_section_statement
,
3032 lang_statement_union_type
**prev
,
3036 bfd_boolean check_regions
)
3038 /* Size up the sections from their constituent parts. */
3039 for (; s
!= NULL
; s
= s
->header
.next
)
3041 switch (s
->header
.type
)
3043 case lang_output_section_statement_enum
:
3046 lang_output_section_statement_type
*os
;
3048 os
= &s
->output_section_statement
;
3049 if (os
->bfd_section
== NULL
)
3050 /* This section was never actually created. */
3053 /* If this is a COFF shared library section, use the size and
3054 address from the input section. FIXME: This is COFF
3055 specific; it would be cleaner if there were some other way
3056 to do this, but nothing simple comes to mind. */
3057 if ((os
->bfd_section
->flags
& SEC_COFF_SHARED_LIBRARY
) != 0)
3061 if (os
->children
.head
== NULL
3062 || os
->children
.head
->header
.next
!= NULL
3063 || (os
->children
.head
->header
.type
3064 != lang_input_section_enum
))
3065 einfo (_("%P%X: Internal error on COFF shared library"
3066 " section %s\n"), os
->name
);
3068 input
= os
->children
.head
->input_section
.section
;
3069 bfd_set_section_vma (os
->bfd_section
->owner
,
3071 bfd_section_vma (input
->owner
, input
));
3072 os
->bfd_section
->size
= input
->size
;
3076 if (bfd_is_abs_section (os
->bfd_section
))
3078 /* No matter what happens, an abs section starts at zero. */
3079 ASSERT (os
->bfd_section
->vma
== 0);
3083 if (os
->addr_tree
== NULL
)
3085 /* No address specified for this section, get one
3086 from the region specification. */
3087 if (os
->region
== NULL
3088 || ((os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))
3089 && os
->region
->name
[0] == '*'
3090 && strcmp (os
->region
->name
,
3091 DEFAULT_MEMORY_REGION
) == 0))
3093 os
->region
= lang_memory_default (os
->bfd_section
);
3096 /* If a loadable section is using the default memory
3097 region, and some non default memory regions were
3098 defined, issue an error message. */
3099 if (!IGNORE_SECTION (os
->bfd_section
)
3100 && ! link_info
.relocatable
3102 && strcmp (os
->region
->name
,
3103 DEFAULT_MEMORY_REGION
) == 0
3104 && lang_memory_region_list
!= NULL
3105 && (strcmp (lang_memory_region_list
->name
,
3106 DEFAULT_MEMORY_REGION
) != 0
3107 || lang_memory_region_list
->next
!= NULL
))
3109 /* By default this is an error rather than just a
3110 warning because if we allocate the section to the
3111 default memory region we can end up creating an
3112 excessively large binary, or even seg faulting when
3113 attempting to perform a negative seek. See
3114 sources.redhat.com/ml/binutils/2003-04/msg00423.html
3115 for an example of this. This behaviour can be
3116 overridden by the using the --no-check-sections
3118 if (command_line
.check_section_addresses
)
3119 einfo (_("%P%F: error: no memory region specified"
3120 " for loadable section `%s'\n"),
3121 bfd_get_section_name (output_bfd
,
3124 einfo (_("%P: warning: no memory region specified"
3125 " for loadable section `%s'\n"),
3126 bfd_get_section_name (output_bfd
,
3130 dot
= os
->region
->current
;
3132 if (os
->section_alignment
== -1)
3137 dot
= align_power (dot
,
3138 os
->bfd_section
->alignment_power
);
3140 if (dot
!= olddot
&& config
.warn_section_align
)
3141 einfo (_("%P: warning: changing start of section"
3142 " %s by %u bytes\n"),
3143 os
->name
, (unsigned int) (dot
- olddot
));
3151 r
= exp_fold_tree (os
->addr_tree
,
3153 lang_allocating_phase_enum
,
3158 einfo (_("%F%S: non constant or forward reference"
3159 " address expression for section %s\n"),
3162 dot
= r
.value
+ r
.section
->bfd_section
->vma
;
3165 /* The section starts here.
3166 First, align to what the section needs. */
3168 if (os
->section_alignment
!= -1)
3169 dot
= align_power (dot
, os
->section_alignment
);
3171 bfd_set_section_vma (0, os
->bfd_section
, dot
);
3173 os
->bfd_section
->output_offset
= 0;
3176 lang_size_sections_1 (os
->children
.head
, os
, &os
->children
.head
,
3177 os
->fill
, dot
, relax
, check_regions
);
3179 /* Put the section within the requested block size, or
3180 align at the block boundary. */
3181 after
= ((os
->bfd_section
->vma
3182 + TO_ADDR (os
->bfd_section
->size
)
3183 + os
->block_value
- 1)
3184 & - (bfd_vma
) os
->block_value
);
3186 if (bfd_is_abs_section (os
->bfd_section
))
3187 ASSERT (after
== os
->bfd_section
->vma
);
3189 os
->bfd_section
->size
3190 = TO_SIZE (after
- os
->bfd_section
->vma
);
3192 dot
= os
->bfd_section
->vma
;
3193 /* .tbss sections effectively have zero size. */
3194 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
3195 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
3196 || link_info
.relocatable
)
3197 dot
+= TO_ADDR (os
->bfd_section
->size
);
3201 if (os
->update_dot_tree
!= 0)
3202 exp_fold_tree (os
->update_dot_tree
, abs_output_section
,
3203 lang_allocating_phase_enum
, dot
, &dot
);
3205 /* Update dot in the region ?
3206 We only do this if the section is going to be allocated,
3207 since unallocated sections do not contribute to the region's
3208 overall size in memory.
3210 If the SEC_NEVER_LOAD bit is not set, it will affect the
3211 addresses of sections after it. We have to update
3213 if (os
->region
!= NULL
3214 && ((os
->bfd_section
->flags
& SEC_NEVER_LOAD
) == 0
3215 || (os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))))
3217 os
->region
->current
= dot
;
3220 /* Make sure the new address is within the region. */
3221 os_region_check (os
, os
->region
, os
->addr_tree
,
3222 os
->bfd_section
->vma
);
3224 /* If there's no load address specified, use the run
3225 region as the load region. */
3226 if (os
->lma_region
== NULL
&& os
->load_base
== NULL
)
3227 os
->lma_region
= os
->region
;
3229 if (os
->lma_region
!= NULL
&& os
->lma_region
!= os
->region
)
3231 /* Set load_base, which will be handled later. */
3232 os
->load_base
= exp_intop (os
->lma_region
->current
);
3233 os
->lma_region
->current
+=
3234 TO_ADDR (os
->bfd_section
->size
);
3236 os_region_check (os
, os
->lma_region
, NULL
,
3237 os
->bfd_section
->lma
);
3243 case lang_constructors_statement_enum
:
3244 dot
= lang_size_sections_1 (constructor_list
.head
,
3245 output_section_statement
,
3246 &s
->wild_statement
.children
.head
,
3247 fill
, dot
, relax
, check_regions
);
3250 case lang_data_statement_enum
:
3252 unsigned int size
= 0;
3254 s
->data_statement
.output_vma
=
3255 dot
- output_section_statement
->bfd_section
->vma
;
3256 s
->data_statement
.output_section
=
3257 output_section_statement
->bfd_section
;
3259 /* We might refer to provided symbols in the expression, and
3260 need to mark them as needed. */
3261 exp_fold_tree (s
->data_statement
.exp
, abs_output_section
,
3262 lang_allocating_phase_enum
, dot
, &dot
);
3264 switch (s
->data_statement
.type
)
3282 if (size
< TO_SIZE ((unsigned) 1))
3283 size
= TO_SIZE ((unsigned) 1);
3284 dot
+= TO_ADDR (size
);
3285 output_section_statement
->bfd_section
->size
+= size
;
3286 /* The output section gets contents, and then we inspect for
3287 any flags set in the input script which override any ALLOC. */
3288 output_section_statement
->bfd_section
->flags
|= SEC_HAS_CONTENTS
;
3289 if (!(output_section_statement
->flags
& SEC_NEVER_LOAD
))
3291 output_section_statement
->bfd_section
->flags
|=
3292 SEC_ALLOC
| SEC_LOAD
;
3297 case lang_reloc_statement_enum
:
3301 s
->reloc_statement
.output_vma
=
3302 dot
- output_section_statement
->bfd_section
->vma
;
3303 s
->reloc_statement
.output_section
=
3304 output_section_statement
->bfd_section
;
3305 size
= bfd_get_reloc_size (s
->reloc_statement
.howto
);
3306 dot
+= TO_ADDR (size
);
3307 output_section_statement
->bfd_section
->size
+= size
;
3311 case lang_wild_statement_enum
:
3313 dot
= lang_size_sections_1 (s
->wild_statement
.children
.head
,
3314 output_section_statement
,
3315 &s
->wild_statement
.children
.head
,
3316 fill
, dot
, relax
, check_regions
);
3320 case lang_object_symbols_statement_enum
:
3321 link_info
.create_object_symbols_section
=
3322 output_section_statement
->bfd_section
;
3324 case lang_output_statement_enum
:
3325 case lang_target_statement_enum
:
3327 case lang_input_section_enum
:
3331 i
= (*prev
)->input_section
.section
;
3336 if (! bfd_relax_section (i
->owner
, i
, &link_info
, &again
))
3337 einfo (_("%P%F: can't relax section: %E\n"));
3341 dot
= size_input_section (prev
, output_section_statement
,
3342 output_section_statement
->fill
, dot
);
3345 case lang_input_statement_enum
:
3347 case lang_fill_statement_enum
:
3348 s
->fill_statement
.output_section
=
3349 output_section_statement
->bfd_section
;
3351 fill
= s
->fill_statement
.fill
;
3353 case lang_assignment_statement_enum
:
3355 bfd_vma newdot
= dot
;
3357 exp_fold_tree (s
->assignment_statement
.exp
,
3358 output_section_statement
,
3359 lang_allocating_phase_enum
,
3365 if (output_section_statement
== abs_output_section
)
3367 /* If we don't have an output section, then just adjust
3368 the default memory address. */
3369 lang_memory_region_lookup (DEFAULT_MEMORY_REGION
,
3370 FALSE
)->current
= newdot
;
3374 /* Insert a pad after this statement. We can't
3375 put the pad before when relaxing, in case the
3376 assignment references dot. */
3377 insert_pad (&s
->header
.next
, fill
, TO_SIZE (newdot
- dot
),
3378 output_section_statement
->bfd_section
, dot
);
3380 /* Don't neuter the pad below when relaxing. */
3384 /* If dot is advanced, this implies that the section should
3385 have space allocated to it, unless the user has explicitly
3386 stated that the section should never be loaded. */
3387 if (!(output_section_statement
->flags
3388 & (SEC_NEVER_LOAD
| SEC_ALLOC
)))
3389 output_section_statement
->bfd_section
->flags
|= SEC_ALLOC
;
3396 case lang_padding_statement_enum
:
3397 /* If this is the first time lang_size_sections is called,
3398 we won't have any padding statements. If this is the
3399 second or later passes when relaxing, we should allow
3400 padding to shrink. If padding is needed on this pass, it
3401 will be added back in. */
3402 s
->padding_statement
.size
= 0;
3404 /* Make sure output_offset is valid. If relaxation shrinks
3405 the section and this pad isn't needed, it's possible to
3406 have output_offset larger than the final size of the
3407 section. bfd_set_section_contents will complain even for
3408 a pad size of zero. */
3409 s
->padding_statement
.output_offset
3410 = dot
- output_section_statement
->bfd_section
->vma
;
3413 case lang_group_statement_enum
:
3414 dot
= lang_size_sections_1 (s
->group_statement
.children
.head
,
3415 output_section_statement
,
3416 &s
->group_statement
.children
.head
,
3417 fill
, dot
, relax
, check_regions
);
3424 /* We can only get here when relaxing is turned on. */
3425 case lang_address_statement_enum
:
3428 prev
= &s
->header
.next
;
3435 (lang_statement_union_type
*s
,
3436 lang_output_section_statement_type
*output_section_statement
,
3437 lang_statement_union_type
**prev
,
3441 bfd_boolean check_regions
)
3445 /* Callers of exp_fold_tree need to increment this. */
3446 lang_statement_iteration
++;
3448 exp_data_seg
.phase
= exp_dataseg_none
;
3449 result
= lang_size_sections_1 (s
, output_section_statement
, prev
, fill
,
3450 dot
, relax
, check_regions
);
3451 if (exp_data_seg
.phase
== exp_dataseg_end_seen
3452 && link_info
.relro
&& exp_data_seg
.relro_end
)
3454 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END pair was seen, try
3455 to put exp_data_seg.relro on a (common) page boundary. */
3457 exp_data_seg
.phase
= exp_dataseg_relro_adjust
;
3458 result
= lang_size_sections_1 (s
, output_section_statement
, prev
, fill
,
3459 dot
, relax
, check_regions
);
3460 link_info
.relro_start
= exp_data_seg
.base
;
3461 link_info
.relro_end
= exp_data_seg
.relro_end
;
3463 else if (exp_data_seg
.phase
== exp_dataseg_end_seen
)
3465 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether
3466 a page could be saved in the data segment. */
3467 bfd_vma first
, last
;
3469 first
= -exp_data_seg
.base
& (exp_data_seg
.pagesize
- 1);
3470 last
= exp_data_seg
.end
& (exp_data_seg
.pagesize
- 1);
3472 && ((exp_data_seg
.base
& ~(exp_data_seg
.pagesize
- 1))
3473 != (exp_data_seg
.end
& ~(exp_data_seg
.pagesize
- 1)))
3474 && first
+ last
<= exp_data_seg
.pagesize
)
3476 exp_data_seg
.phase
= exp_dataseg_adjust
;
3477 lang_statement_iteration
++;
3478 result
= lang_size_sections_1 (s
, output_section_statement
, prev
,
3479 fill
, dot
, relax
, check_regions
);
3486 /* Worker function for lang_do_assignments. Recursiveness goes here. */
3489 lang_do_assignments_1
3490 (lang_statement_union_type
*s
,
3491 lang_output_section_statement_type
*output_section_statement
,
3495 for (; s
!= NULL
; s
= s
->header
.next
)
3497 switch (s
->header
.type
)
3499 case lang_constructors_statement_enum
:
3500 dot
= lang_do_assignments_1 (constructor_list
.head
,
3501 output_section_statement
,
3506 case lang_output_section_statement_enum
:
3508 lang_output_section_statement_type
*os
;
3510 os
= &(s
->output_section_statement
);
3511 if (os
->bfd_section
!= NULL
)
3513 dot
= os
->bfd_section
->vma
;
3514 lang_do_assignments_1 (os
->children
.head
, os
, os
->fill
, dot
);
3515 /* .tbss sections effectively have zero size. */
3516 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
3517 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
3518 || link_info
.relocatable
)
3519 dot
+= TO_ADDR (os
->bfd_section
->size
);
3523 /* If nothing has been placed into the output section then
3524 it won't have a bfd_section. */
3525 if (os
->bfd_section
)
3527 os
->bfd_section
->lma
3528 = exp_get_abs_int (os
->load_base
, 0, "load base",
3529 lang_final_phase_enum
);
3534 case lang_wild_statement_enum
:
3536 dot
= lang_do_assignments_1 (s
->wild_statement
.children
.head
,
3537 output_section_statement
,
3542 case lang_object_symbols_statement_enum
:
3543 case lang_output_statement_enum
:
3544 case lang_target_statement_enum
:
3546 case lang_common_statement_enum
:
3549 case lang_data_statement_enum
:
3551 etree_value_type value
;
3553 value
= exp_fold_tree (s
->data_statement
.exp
,
3555 lang_final_phase_enum
, dot
, &dot
);
3557 einfo (_("%F%P: invalid data statement\n"));
3558 s
->data_statement
.value
3559 = value
.value
+ value
.section
->bfd_section
->vma
;
3563 switch (s
->data_statement
.type
)
3581 if (size
< TO_SIZE ((unsigned) 1))
3582 size
= TO_SIZE ((unsigned) 1);
3583 dot
+= TO_ADDR (size
);
3587 case lang_reloc_statement_enum
:
3589 etree_value_type value
;
3591 value
= exp_fold_tree (s
->reloc_statement
.addend_exp
,
3593 lang_final_phase_enum
, dot
, &dot
);
3594 s
->reloc_statement
.addend_value
= value
.value
;
3596 einfo (_("%F%P: invalid reloc statement\n"));
3598 dot
+= TO_ADDR (bfd_get_reloc_size (s
->reloc_statement
.howto
));
3601 case lang_input_section_enum
:
3603 asection
*in
= s
->input_section
.section
;
3605 if ((in
->flags
& SEC_EXCLUDE
) == 0)
3606 dot
+= TO_ADDR (in
->size
);
3610 case lang_input_statement_enum
:
3612 case lang_fill_statement_enum
:
3613 fill
= s
->fill_statement
.fill
;
3615 case lang_assignment_statement_enum
:
3617 exp_fold_tree (s
->assignment_statement
.exp
,
3618 output_section_statement
,
3619 lang_final_phase_enum
,
3625 case lang_padding_statement_enum
:
3626 dot
+= TO_ADDR (s
->padding_statement
.size
);
3629 case lang_group_statement_enum
:
3630 dot
= lang_do_assignments_1 (s
->group_statement
.children
.head
,
3631 output_section_statement
,
3639 case lang_address_statement_enum
:
3649 (lang_statement_union_type
*s
,
3650 lang_output_section_statement_type
*output_section_statement
,
3654 /* Callers of exp_fold_tree need to increment this. */
3655 lang_statement_iteration
++;
3656 lang_do_assignments_1 (s
, output_section_statement
, fill
, dot
);
3659 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
3660 operator .startof. (section_name), it produces an undefined symbol
3661 .startof.section_name. Similarly, when it sees
3662 .sizeof. (section_name), it produces an undefined symbol
3663 .sizeof.section_name. For all the output sections, we look for
3664 such symbols, and set them to the correct value. */
3667 lang_set_startof (void)
3671 if (link_info
.relocatable
)
3674 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
3676 const char *secname
;
3678 struct bfd_link_hash_entry
*h
;
3680 secname
= bfd_get_section_name (output_bfd
, s
);
3681 buf
= xmalloc (10 + strlen (secname
));
3683 sprintf (buf
, ".startof.%s", secname
);
3684 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
3685 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
3687 h
->type
= bfd_link_hash_defined
;
3688 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, s
);
3689 h
->u
.def
.section
= bfd_abs_section_ptr
;
3692 sprintf (buf
, ".sizeof.%s", secname
);
3693 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
3694 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
3696 h
->type
= bfd_link_hash_defined
;
3697 h
->u
.def
.value
= TO_ADDR (s
->size
);
3698 h
->u
.def
.section
= bfd_abs_section_ptr
;
3708 struct bfd_link_hash_entry
*h
;
3711 if (link_info
.relocatable
|| link_info
.shared
)
3716 if (entry_symbol
.name
== NULL
)
3718 /* No entry has been specified. Look for start, but don't warn
3719 if we don't find it. */
3720 entry_symbol
.name
= "start";
3724 h
= bfd_link_hash_lookup (link_info
.hash
, entry_symbol
.name
,
3725 FALSE
, FALSE
, TRUE
);
3727 && (h
->type
== bfd_link_hash_defined
3728 || h
->type
== bfd_link_hash_defweak
)
3729 && h
->u
.def
.section
->output_section
!= NULL
)
3733 val
= (h
->u
.def
.value
3734 + bfd_get_section_vma (output_bfd
,
3735 h
->u
.def
.section
->output_section
)
3736 + h
->u
.def
.section
->output_offset
);
3737 if (! bfd_set_start_address (output_bfd
, val
))
3738 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol
.name
);
3745 /* We couldn't find the entry symbol. Try parsing it as a
3747 val
= bfd_scan_vma (entry_symbol
.name
, &send
, 0);
3750 if (! bfd_set_start_address (output_bfd
, val
))
3751 einfo (_("%P%F: can't set start address\n"));
3757 /* Can't find the entry symbol, and it's not a number. Use
3758 the first address in the text section. */
3759 ts
= bfd_get_section_by_name (output_bfd
, entry_section
);
3763 einfo (_("%P: warning: cannot find entry symbol %s;"
3764 " defaulting to %V\n"),
3766 bfd_get_section_vma (output_bfd
, ts
));
3767 if (! bfd_set_start_address (output_bfd
,
3768 bfd_get_section_vma (output_bfd
,
3770 einfo (_("%P%F: can't set start address\n"));
3775 einfo (_("%P: warning: cannot find entry symbol %s;"
3776 " not setting start address\n"),
3782 /* Don't bfd_hash_table_free (&lang_definedness_table);
3783 map file output may result in a call of lang_track_definedness. */
3786 /* This is a small function used when we want to ignore errors from
3790 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED
, ...)
3792 /* Don't do anything. */
3795 /* Check that the architecture of all the input files is compatible
3796 with the output file. Also call the backend to let it do any
3797 other checking that is needed. */
3802 lang_statement_union_type
*file
;
3804 const bfd_arch_info_type
*compatible
;
3806 for (file
= file_chain
.head
; file
!= NULL
; file
= file
->input_statement
.next
)
3808 input_bfd
= file
->input_statement
.the_bfd
;
3810 = bfd_arch_get_compatible (input_bfd
, output_bfd
,
3811 command_line
.accept_unknown_input_arch
);
3813 /* In general it is not possible to perform a relocatable
3814 link between differing object formats when the input
3815 file has relocations, because the relocations in the
3816 input format may not have equivalent representations in
3817 the output format (and besides BFD does not translate
3818 relocs for other link purposes than a final link). */
3819 if ((link_info
.relocatable
|| link_info
.emitrelocations
)
3820 && (compatible
== NULL
3821 || bfd_get_flavour (input_bfd
) != bfd_get_flavour (output_bfd
))
3822 && (bfd_get_file_flags (input_bfd
) & HAS_RELOC
) != 0)
3824 einfo (_("%P%F: Relocatable linking with relocations from"
3825 " format %s (%B) to format %s (%B) is not supported\n"),
3826 bfd_get_target (input_bfd
), input_bfd
,
3827 bfd_get_target (output_bfd
), output_bfd
);
3828 /* einfo with %F exits. */
3831 if (compatible
== NULL
)
3833 if (command_line
.warn_mismatch
)
3834 einfo (_("%P: warning: %s architecture of input file `%B'"
3835 " is incompatible with %s output\n"),
3836 bfd_printable_name (input_bfd
), input_bfd
,
3837 bfd_printable_name (output_bfd
));
3839 else if (bfd_count_sections (input_bfd
))
3841 /* If the input bfd has no contents, it shouldn't set the
3842 private data of the output bfd. */
3844 bfd_error_handler_type pfn
= NULL
;
3846 /* If we aren't supposed to warn about mismatched input
3847 files, temporarily set the BFD error handler to a
3848 function which will do nothing. We still want to call
3849 bfd_merge_private_bfd_data, since it may set up
3850 information which is needed in the output file. */
3851 if (! command_line
.warn_mismatch
)
3852 pfn
= bfd_set_error_handler (ignore_bfd_errors
);
3853 if (! bfd_merge_private_bfd_data (input_bfd
, output_bfd
))
3855 if (command_line
.warn_mismatch
)
3856 einfo (_("%P%X: failed to merge target specific data"
3857 " of file %B\n"), input_bfd
);
3859 if (! command_line
.warn_mismatch
)
3860 bfd_set_error_handler (pfn
);
3865 /* Look through all the global common symbols and attach them to the
3866 correct section. The -sort-common command line switch may be used
3867 to roughly sort the entries by size. */
3872 if (command_line
.inhibit_common_definition
)
3874 if (link_info
.relocatable
3875 && ! command_line
.force_common_definition
)
3878 if (! config
.sort_common
)
3879 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, NULL
);
3884 for (power
= 4; power
>= 0; power
--)
3885 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, &power
);
3889 /* Place one common symbol in the correct section. */
3892 lang_one_common (struct bfd_link_hash_entry
*h
, void *info
)
3894 unsigned int power_of_two
;
3898 if (h
->type
!= bfd_link_hash_common
)
3902 power_of_two
= h
->u
.c
.p
->alignment_power
;
3904 if (config
.sort_common
3905 && power_of_two
< (unsigned int) *(int *) info
)
3908 section
= h
->u
.c
.p
->section
;
3910 /* Increase the size of the section to align the common sym. */
3911 section
->size
+= ((bfd_vma
) 1 << (power_of_two
+ opb_shift
)) - 1;
3912 section
->size
&= (- (bfd_vma
) 1 << (power_of_two
+ opb_shift
));
3914 /* Adjust the alignment if necessary. */
3915 if (power_of_two
> section
->alignment_power
)
3916 section
->alignment_power
= power_of_two
;
3918 /* Change the symbol from common to defined. */
3919 h
->type
= bfd_link_hash_defined
;
3920 h
->u
.def
.section
= section
;
3921 h
->u
.def
.value
= section
->size
;
3923 /* Increase the size of the section. */
3924 section
->size
+= size
;
3926 /* Make sure the section is allocated in memory, and make sure that
3927 it is no longer a common section. */
3928 section
->flags
|= SEC_ALLOC
;
3929 section
->flags
&= ~SEC_IS_COMMON
;
3931 if (config
.map_file
!= NULL
)
3933 static bfd_boolean header_printed
;
3938 if (! header_printed
)
3940 minfo (_("\nAllocating common symbols\n"));
3941 minfo (_("Common symbol size file\n\n"));
3942 header_printed
= TRUE
;
3945 name
= demangle (h
->root
.string
);
3947 len
= strlen (name
);
3962 if (size
<= 0xffffffff)
3963 sprintf (buf
, "%lx", (unsigned long) size
);
3965 sprintf_vma (buf
, size
);
3975 minfo ("%B\n", section
->owner
);
3981 /* Run through the input files and ensure that every input section has
3982 somewhere to go. If one is found without a destination then create
3983 an input request and place it into the statement tree. */
3986 lang_place_orphans (void)
3988 LANG_FOR_EACH_INPUT_STATEMENT (file
)
3992 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
3994 if (s
->output_section
== NULL
)
3996 /* This section of the file is not attached, root
3997 around for a sensible place for it to go. */
3999 if (file
->just_syms_flag
)
4002 if ((s
->flags
& SEC_EXCLUDE
) != 0)
4003 s
->output_section
= bfd_abs_section_ptr
;
4004 else if (strcmp (s
->name
, "COMMON") == 0)
4006 /* This is a lonely common section which must have
4007 come from an archive. We attach to the section
4008 with the wildcard. */
4009 if (! link_info
.relocatable
4010 || command_line
.force_common_definition
)
4012 if (default_common_section
== NULL
)
4015 /* This message happens when using the
4016 svr3.ifile linker script, so I have
4018 info_msg (_("%P: no [COMMON] command,"
4019 " defaulting to .bss\n"));
4021 default_common_section
=
4022 lang_output_section_statement_lookup (".bss");
4025 lang_add_section (&default_common_section
->children
, s
,
4026 default_common_section
, file
);
4029 else if (ldemul_place_orphan (file
, s
))
4033 lang_output_section_statement_type
*os
;
4035 os
= lang_output_section_statement_lookup (s
->name
);
4036 lang_add_section (&os
->children
, s
, os
, file
);
4044 lang_set_flags (lang_memory_region_type
*ptr
, const char *flags
, int invert
)
4046 flagword
*ptr_flags
;
4048 ptr_flags
= invert
? &ptr
->not_flags
: &ptr
->flags
;
4054 *ptr_flags
|= SEC_ALLOC
;
4058 *ptr_flags
|= SEC_READONLY
;
4062 *ptr_flags
|= SEC_DATA
;
4066 *ptr_flags
|= SEC_CODE
;
4071 *ptr_flags
|= SEC_LOAD
;
4075 einfo (_("%P%F: invalid syntax in flags\n"));
4082 /* Call a function on each input file. This function will be called
4083 on an archive, but not on the elements. */
4086 lang_for_each_input_file (void (*func
) (lang_input_statement_type
*))
4088 lang_input_statement_type
*f
;
4090 for (f
= (lang_input_statement_type
*) input_file_chain
.head
;
4092 f
= (lang_input_statement_type
*) f
->next_real_file
)
4096 /* Call a function on each file. The function will be called on all
4097 the elements of an archive which are included in the link, but will
4098 not be called on the archive file itself. */
4101 lang_for_each_file (void (*func
) (lang_input_statement_type
*))
4103 LANG_FOR_EACH_INPUT_STATEMENT (f
)
4110 ldlang_add_file (lang_input_statement_type
*entry
)
4114 lang_statement_append (&file_chain
,
4115 (lang_statement_union_type
*) entry
,
4118 /* The BFD linker needs to have a list of all input BFDs involved in
4120 ASSERT (entry
->the_bfd
->link_next
== NULL
);
4121 ASSERT (entry
->the_bfd
!= output_bfd
);
4122 for (pp
= &link_info
.input_bfds
; *pp
!= NULL
; pp
= &(*pp
)->link_next
)
4124 *pp
= entry
->the_bfd
;
4125 entry
->the_bfd
->usrdata
= entry
;
4126 bfd_set_gp_size (entry
->the_bfd
, g_switch_value
);
4128 /* Look through the sections and check for any which should not be
4129 included in the link. We need to do this now, so that we can
4130 notice when the backend linker tries to report multiple
4131 definition errors for symbols which are in sections we aren't
4132 going to link. FIXME: It might be better to entirely ignore
4133 symbols which are defined in sections which are going to be
4134 discarded. This would require modifying the backend linker for
4135 each backend which might set the SEC_LINK_ONCE flag. If we do
4136 this, we should probably handle SEC_EXCLUDE in the same way. */
4138 bfd_map_over_sections (entry
->the_bfd
, section_already_linked
, entry
);
4142 lang_add_output (const char *name
, int from_script
)
4144 /* Make -o on command line override OUTPUT in script. */
4145 if (!had_output_filename
|| !from_script
)
4147 output_filename
= name
;
4148 had_output_filename
= TRUE
;
4152 static lang_output_section_statement_type
*current_section
;
4163 for (l
= 0; l
< 32; l
++)
4165 if (i
>= (unsigned int) x
)
4173 lang_output_section_statement_type
*
4174 lang_enter_output_section_statement (const char *output_section_statement_name
,
4175 etree_type
*address_exp
,
4176 enum section_type sectype
,
4178 etree_type
*subalign
,
4182 lang_output_section_statement_type
*os
;
4186 lang_output_section_statement_lookup_1 (output_section_statement_name
,
4189 /* Add this statement to tree. */
4191 add_statement (lang_output_section_statement_enum
,
4192 output_section_statement
);
4194 /* Make next things chain into subchain of this. */
4196 if (os
->addr_tree
== NULL
)
4198 os
->addr_tree
= address_exp
;
4200 os
->sectype
= sectype
;
4201 if (sectype
!= noload_section
)
4202 os
->flags
= SEC_NO_FLAGS
;
4204 os
->flags
= SEC_NEVER_LOAD
;
4205 os
->block_value
= 1;
4206 stat_ptr
= &os
->children
;
4208 os
->subsection_alignment
=
4209 topower (exp_get_value_int (subalign
, -1, "subsection alignment", 0));
4210 os
->section_alignment
=
4211 topower (exp_get_value_int (align
, -1, "section alignment", 0));
4213 os
->load_base
= ebase
;
4220 lang_output_statement_type
*new =
4221 new_stat (lang_output_statement
, stat_ptr
);
4223 new->name
= output_filename
;
4226 /* Reset the current counters in the regions. */
4229 lang_reset_memory_regions (void)
4231 lang_memory_region_type
*p
= lang_memory_region_list
;
4234 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
4236 p
->old_length
= (bfd_size_type
) (p
->current
- p
->origin
);
4237 p
->current
= p
->origin
;
4240 for (o
= output_bfd
->sections
; o
!= NULL
; o
= o
->next
)
4242 /* Save the last size for possible use by bfd_relax_section. */
4243 o
->rawsize
= o
->size
;
4248 /* Worker for lang_gc_sections_1. */
4251 gc_section_callback (lang_wild_statement_type
*ptr
,
4252 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
4254 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
4255 void *data ATTRIBUTE_UNUSED
)
4257 /* If the wild pattern was marked KEEP, the member sections
4258 should be as well. */
4259 if (ptr
->keep_sections
)
4260 section
->flags
|= SEC_KEEP
;
4263 /* Iterate over sections marking them against GC. */
4266 lang_gc_sections_1 (lang_statement_union_type
*s
)
4268 for (; s
!= NULL
; s
= s
->header
.next
)
4270 switch (s
->header
.type
)
4272 case lang_wild_statement_enum
:
4273 walk_wild (&s
->wild_statement
, gc_section_callback
, NULL
);
4275 case lang_constructors_statement_enum
:
4276 lang_gc_sections_1 (constructor_list
.head
);
4278 case lang_output_section_statement_enum
:
4279 lang_gc_sections_1 (s
->output_section_statement
.children
.head
);
4281 case lang_group_statement_enum
:
4282 lang_gc_sections_1 (s
->group_statement
.children
.head
);
4291 lang_gc_sections (void)
4293 struct bfd_link_hash_entry
*h
;
4294 ldlang_undef_chain_list_type
*ulist
;
4296 /* Keep all sections so marked in the link script. */
4298 lang_gc_sections_1 (statement_list
.head
);
4300 /* Keep all sections containing symbols undefined on the command-line,
4301 and the section containing the entry symbol. */
4303 for (ulist
= link_info
.gc_sym_list
; ulist
; ulist
= ulist
->next
)
4305 h
= bfd_link_hash_lookup (link_info
.hash
, ulist
->name
,
4306 FALSE
, FALSE
, FALSE
);
4309 && (h
->type
== bfd_link_hash_defined
4310 || h
->type
== bfd_link_hash_defweak
)
4311 && ! bfd_is_abs_section (h
->u
.def
.section
))
4313 h
->u
.def
.section
->flags
|= SEC_KEEP
;
4317 /* SEC_EXCLUDE is ignored when doing a relocatable link, except in
4318 the special case of debug info. (See bfd/stabs.c)
4319 Twiddle the flag here, to simplify later linker code. */
4320 if (link_info
.relocatable
)
4322 LANG_FOR_EACH_INPUT_STATEMENT (f
)
4325 for (sec
= f
->the_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
4326 if ((sec
->flags
& SEC_DEBUGGING
) == 0)
4327 sec
->flags
&= ~SEC_EXCLUDE
;
4331 if (command_line
.gc_sections
)
4332 bfd_gc_sections (output_bfd
, &link_info
);
4338 lang_reasonable_defaults ();
4339 current_target
= default_target
;
4341 /* Open the output file. */
4342 lang_for_each_statement (ldlang_open_output
);
4345 ldemul_create_output_section_statements ();
4347 /* Add to the hash table all undefineds on the command line. */
4348 lang_place_undefineds ();
4350 already_linked_table_init ();
4352 /* Create a bfd for each input file. */
4353 current_target
= default_target
;
4354 open_input_bfds (statement_list
.head
, FALSE
);
4356 link_info
.gc_sym_list
= &entry_symbol
;
4357 if (entry_symbol
.name
== NULL
)
4358 link_info
.gc_sym_list
= ldlang_undef_chain_list_head
;
4360 ldemul_after_open ();
4362 already_linked_table_free ();
4364 /* Make sure that we're not mixing architectures. We call this
4365 after all the input files have been opened, but before we do any
4366 other processing, so that any operations merge_private_bfd_data
4367 does on the output file will be known during the rest of the
4371 /* Handle .exports instead of a version script if we're told to do so. */
4372 if (command_line
.version_exports_section
)
4373 lang_do_version_exports_section ();
4375 /* Build all sets based on the information gathered from the input
4377 ldctor_build_sets ();
4379 /* Remove unreferenced sections if asked to. */
4380 lang_gc_sections ();
4382 /* Size up the common data. */
4385 /* Run through the contours of the script and attach input sections
4386 to the correct output sections. */
4387 map_input_to_output_sections (statement_list
.head
, NULL
, NULL
);
4389 /* Find any sections not attached explicitly and handle them. */
4390 lang_place_orphans ();
4392 if (! link_info
.relocatable
)
4396 /* Merge SEC_MERGE sections. This has to be done after GC of
4397 sections, so that GCed sections are not merged, but before
4398 assigning dynamic symbols, since removing whole input sections
4400 bfd_merge_sections (output_bfd
, &link_info
);
4402 /* Look for a text section and set the readonly attribute in it. */
4403 found
= bfd_get_section_by_name (output_bfd
, ".text");
4407 if (config
.text_read_only
)
4408 found
->flags
|= SEC_READONLY
;
4410 found
->flags
&= ~SEC_READONLY
;
4414 /* Do anything special before sizing sections. This is where ELF
4415 and other back-ends size dynamic sections. */
4416 ldemul_before_allocation ();
4418 if (!link_info
.relocatable
)
4419 strip_excluded_output_sections ();
4421 /* We must record the program headers before we try to fix the
4422 section positions, since they will affect SIZEOF_HEADERS. */
4423 lang_record_phdrs ();
4425 /* Size up the sections. */
4426 lang_size_sections (statement_list
.head
, abs_output_section
,
4427 &statement_list
.head
, 0, 0, NULL
,
4428 command_line
.relax
? FALSE
: TRUE
);
4430 /* Now run around and relax if we can. */
4431 if (command_line
.relax
)
4433 /* Keep relaxing until bfd_relax_section gives up. */
4434 bfd_boolean relax_again
;
4438 relax_again
= FALSE
;
4440 /* Note: pe-dll.c does something like this also. If you find
4441 you need to change this code, you probably need to change
4442 pe-dll.c also. DJ */
4444 /* Do all the assignments with our current guesses as to
4446 lang_do_assignments (statement_list
.head
, abs_output_section
,
4449 /* We must do this after lang_do_assignments, because it uses
4451 lang_reset_memory_regions ();
4453 /* Perform another relax pass - this time we know where the
4454 globals are, so can make a better guess. */
4455 lang_size_sections (statement_list
.head
, abs_output_section
,
4456 &statement_list
.head
, 0, 0, &relax_again
, FALSE
);
4458 /* If the normal relax is done and the relax finalize pass
4459 is not performed yet, we perform another relax pass. */
4460 if (!relax_again
&& link_info
.need_relax_finalize
)
4462 link_info
.need_relax_finalize
= FALSE
;
4466 while (relax_again
);
4468 /* Final extra sizing to report errors. */
4469 lang_do_assignments (statement_list
.head
, abs_output_section
, NULL
, 0);
4470 lang_reset_memory_regions ();
4471 lang_size_sections (statement_list
.head
, abs_output_section
,
4472 &statement_list
.head
, 0, 0, NULL
, TRUE
);
4475 /* See if anything special should be done now we know how big
4477 ldemul_after_allocation ();
4479 /* Fix any .startof. or .sizeof. symbols. */
4480 lang_set_startof ();
4482 /* Do all the assignments, now that we know the final resting places
4483 of all the symbols. */
4485 lang_do_assignments (statement_list
.head
, abs_output_section
, NULL
, 0);
4487 /* Make sure that the section addresses make sense. */
4488 if (! link_info
.relocatable
4489 && command_line
.check_section_addresses
)
4490 lang_check_section_addresses ();
4498 /* EXPORTED TO YACC */
4501 lang_add_wild (struct wildcard_spec
*filespec
,
4502 struct wildcard_list
*section_list
,
4503 bfd_boolean keep_sections
)
4505 struct wildcard_list
*curr
, *next
;
4506 lang_wild_statement_type
*new;
4508 /* Reverse the list as the parser puts it back to front. */
4509 for (curr
= section_list
, section_list
= NULL
;
4511 section_list
= curr
, curr
= next
)
4513 if (curr
->spec
.name
!= NULL
&& strcmp (curr
->spec
.name
, "COMMON") == 0)
4514 placed_commons
= TRUE
;
4517 curr
->next
= section_list
;
4520 if (filespec
!= NULL
&& filespec
->name
!= NULL
)
4522 if (strcmp (filespec
->name
, "*") == 0)
4523 filespec
->name
= NULL
;
4524 else if (! wildcardp (filespec
->name
))
4525 lang_has_input_file
= TRUE
;
4528 new = new_stat (lang_wild_statement
, stat_ptr
);
4529 new->filename
= NULL
;
4530 new->filenames_sorted
= FALSE
;
4531 if (filespec
!= NULL
)
4533 new->filename
= filespec
->name
;
4534 new->filenames_sorted
= filespec
->sorted
;
4536 new->section_list
= section_list
;
4537 new->keep_sections
= keep_sections
;
4538 lang_list_init (&new->children
);
4542 lang_section_start (const char *name
, etree_type
*address
)
4544 lang_address_statement_type
*ad
;
4546 ad
= new_stat (lang_address_statement
, stat_ptr
);
4547 ad
->section_name
= name
;
4548 ad
->address
= address
;
4551 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
4552 because of a -e argument on the command line, or zero if this is
4553 called by ENTRY in a linker script. Command line arguments take
4557 lang_add_entry (const char *name
, bfd_boolean cmdline
)
4559 if (entry_symbol
.name
== NULL
4561 || ! entry_from_cmdline
)
4563 entry_symbol
.name
= name
;
4564 entry_from_cmdline
= cmdline
;
4569 lang_add_target (const char *name
)
4571 lang_target_statement_type
*new = new_stat (lang_target_statement
,
4579 lang_add_map (const char *name
)
4586 map_option_f
= TRUE
;
4594 lang_add_fill (fill_type
*fill
)
4596 lang_fill_statement_type
*new = new_stat (lang_fill_statement
,
4603 lang_add_data (int type
, union etree_union
*exp
)
4606 lang_data_statement_type
*new = new_stat (lang_data_statement
,
4614 /* Create a new reloc statement. RELOC is the BFD relocation type to
4615 generate. HOWTO is the corresponding howto structure (we could
4616 look this up, but the caller has already done so). SECTION is the
4617 section to generate a reloc against, or NAME is the name of the
4618 symbol to generate a reloc against. Exactly one of SECTION and
4619 NAME must be NULL. ADDEND is an expression for the addend. */
4622 lang_add_reloc (bfd_reloc_code_real_type reloc
,
4623 reloc_howto_type
*howto
,
4626 union etree_union
*addend
)
4628 lang_reloc_statement_type
*p
= new_stat (lang_reloc_statement
, stat_ptr
);
4632 p
->section
= section
;
4634 p
->addend_exp
= addend
;
4636 p
->addend_value
= 0;
4637 p
->output_section
= NULL
;
4641 lang_assignment_statement_type
*
4642 lang_add_assignment (etree_type
*exp
)
4644 lang_assignment_statement_type
*new = new_stat (lang_assignment_statement
,
4652 lang_add_attribute (enum statement_enum attribute
)
4654 new_statement (attribute
, sizeof (lang_statement_union_type
), stat_ptr
);
4658 lang_startup (const char *name
)
4660 if (startup_file
!= NULL
)
4662 einfo (_("%P%Fmultiple STARTUP files\n"));
4664 first_file
->filename
= name
;
4665 first_file
->local_sym_name
= name
;
4666 first_file
->real
= TRUE
;
4668 startup_file
= name
;
4672 lang_float (bfd_boolean maybe
)
4674 lang_float_flag
= maybe
;
4678 /* Work out the load- and run-time regions from a script statement, and
4679 store them in *LMA_REGION and *REGION respectively.
4681 MEMSPEC is the name of the run-time region, or the value of
4682 DEFAULT_MEMORY_REGION if the statement didn't specify one.
4683 LMA_MEMSPEC is the name of the load-time region, or null if the
4684 statement didn't specify one.HAVE_LMA_P is TRUE if the statement
4685 had an explicit load address.
4687 It is an error to specify both a load region and a load address. */
4690 lang_get_regions (lang_memory_region_type
**region
,
4691 lang_memory_region_type
**lma_region
,
4692 const char *memspec
,
4693 const char *lma_memspec
,
4694 bfd_boolean have_lma
,
4695 bfd_boolean have_vma
)
4697 *lma_region
= lang_memory_region_lookup (lma_memspec
, FALSE
);
4699 /* If no runtime region or VMA has been specified, but the load region
4700 has been specified, then use the load region for the runtime region
4702 if (lma_memspec
!= NULL
4704 && strcmp (memspec
, DEFAULT_MEMORY_REGION
) == 0)
4705 *region
= *lma_region
;
4707 *region
= lang_memory_region_lookup (memspec
, FALSE
);
4709 if (have_lma
&& lma_memspec
!= 0)
4710 einfo (_("%X%P:%S: section has both a load address and a load region\n"));
4714 lang_leave_output_section_statement (fill_type
*fill
, const char *memspec
,
4715 lang_output_section_phdr_list
*phdrs
,
4716 const char *lma_memspec
)
4718 lang_get_regions (¤t_section
->region
,
4719 ¤t_section
->lma_region
,
4720 memspec
, lma_memspec
,
4721 current_section
->load_base
!= NULL
,
4722 current_section
->addr_tree
!= NULL
);
4723 current_section
->fill
= fill
;
4724 current_section
->phdrs
= phdrs
;
4725 stat_ptr
= &statement_list
;
4728 /* Create an absolute symbol with the given name with the value of the
4729 address of first byte of the section named.
4731 If the symbol already exists, then do nothing. */
4734 lang_abs_symbol_at_beginning_of (const char *secname
, const char *name
)
4736 struct bfd_link_hash_entry
*h
;
4738 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
4740 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4742 if (h
->type
== bfd_link_hash_new
4743 || h
->type
== bfd_link_hash_undefined
)
4747 h
->type
= bfd_link_hash_defined
;
4749 sec
= bfd_get_section_by_name (output_bfd
, secname
);
4753 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, sec
);
4755 h
->u
.def
.section
= bfd_abs_section_ptr
;
4759 /* Create an absolute symbol with the given name with the value of the
4760 address of the first byte after the end of the section named.
4762 If the symbol already exists, then do nothing. */
4765 lang_abs_symbol_at_end_of (const char *secname
, const char *name
)
4767 struct bfd_link_hash_entry
*h
;
4769 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
4771 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4773 if (h
->type
== bfd_link_hash_new
4774 || h
->type
== bfd_link_hash_undefined
)
4778 h
->type
= bfd_link_hash_defined
;
4780 sec
= bfd_get_section_by_name (output_bfd
, secname
);
4784 h
->u
.def
.value
= (bfd_get_section_vma (output_bfd
, sec
)
4785 + TO_ADDR (sec
->size
));
4787 h
->u
.def
.section
= bfd_abs_section_ptr
;
4792 lang_statement_append (lang_statement_list_type
*list
,
4793 lang_statement_union_type
*element
,
4794 lang_statement_union_type
**field
)
4796 *(list
->tail
) = element
;
4800 /* Set the output format type. -oformat overrides scripts. */
4803 lang_add_output_format (const char *format
,
4808 if (output_target
== NULL
|| !from_script
)
4810 if (command_line
.endian
== ENDIAN_BIG
4813 else if (command_line
.endian
== ENDIAN_LITTLE
4817 output_target
= format
;
4821 /* Enter a group. This creates a new lang_group_statement, and sets
4822 stat_ptr to build new statements within the group. */
4825 lang_enter_group (void)
4827 lang_group_statement_type
*g
;
4829 g
= new_stat (lang_group_statement
, stat_ptr
);
4830 lang_list_init (&g
->children
);
4831 stat_ptr
= &g
->children
;
4834 /* Leave a group. This just resets stat_ptr to start writing to the
4835 regular list of statements again. Note that this will not work if
4836 groups can occur inside anything else which can adjust stat_ptr,
4837 but currently they can't. */
4840 lang_leave_group (void)
4842 stat_ptr
= &statement_list
;
4845 /* Add a new program header. This is called for each entry in a PHDRS
4846 command in a linker script. */
4849 lang_new_phdr (const char *name
,
4851 bfd_boolean filehdr
,
4856 struct lang_phdr
*n
, **pp
;
4858 n
= stat_alloc (sizeof (struct lang_phdr
));
4861 n
->type
= exp_get_value_int (type
, 0, "program header type",
4862 lang_final_phase_enum
);
4863 n
->filehdr
= filehdr
;
4868 for (pp
= &lang_phdr_list
; *pp
!= NULL
; pp
= &(*pp
)->next
)
4873 /* Record the program header information in the output BFD. FIXME: We
4874 should not be calling an ELF specific function here. */
4877 lang_record_phdrs (void)
4881 lang_output_section_phdr_list
*last
;
4882 struct lang_phdr
*l
;
4883 lang_statement_union_type
*u
;
4886 secs
= xmalloc (alc
* sizeof (asection
*));
4888 for (l
= lang_phdr_list
; l
!= NULL
; l
= l
->next
)
4895 for (u
= lang_output_section_statement
.head
;
4897 u
= u
->output_section_statement
.next
)
4899 lang_output_section_statement_type
*os
;
4900 lang_output_section_phdr_list
*pl
;
4902 os
= &u
->output_section_statement
;
4903 if (os
->constraint
== -1)
4911 if (os
->sectype
== noload_section
4912 || os
->bfd_section
== NULL
4913 || (os
->bfd_section
->flags
& SEC_ALLOC
) == 0)
4918 if (os
->bfd_section
== NULL
)
4921 for (; pl
!= NULL
; pl
= pl
->next
)
4923 if (strcmp (pl
->name
, l
->name
) == 0)
4928 secs
= xrealloc (secs
, alc
* sizeof (asection
*));
4930 secs
[c
] = os
->bfd_section
;
4937 if (l
->flags
== NULL
)
4940 flags
= exp_get_vma (l
->flags
, 0, "phdr flags",
4941 lang_final_phase_enum
);
4946 at
= exp_get_vma (l
->at
, 0, "phdr load address",
4947 lang_final_phase_enum
);
4949 if (! bfd_record_phdr (output_bfd
, l
->type
,
4950 l
->flags
!= NULL
, flags
, l
->at
!= NULL
,
4951 at
, l
->filehdr
, l
->phdrs
, c
, secs
))
4952 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
4957 /* Make sure all the phdr assignments succeeded. */
4958 for (u
= lang_output_section_statement
.head
;
4960 u
= u
->output_section_statement
.next
)
4962 lang_output_section_phdr_list
*pl
;
4964 if (u
->output_section_statement
.constraint
== -1
4965 || u
->output_section_statement
.bfd_section
== NULL
)
4968 for (pl
= u
->output_section_statement
.phdrs
;
4971 if (! pl
->used
&& strcmp (pl
->name
, "NONE") != 0)
4972 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
4973 u
->output_section_statement
.name
, pl
->name
);
4977 /* Record a list of sections which may not be cross referenced. */
4980 lang_add_nocrossref (lang_nocrossref_type
*l
)
4982 struct lang_nocrossrefs
*n
;
4984 n
= xmalloc (sizeof *n
);
4985 n
->next
= nocrossref_list
;
4987 nocrossref_list
= n
;
4989 /* Set notice_all so that we get informed about all symbols. */
4990 link_info
.notice_all
= TRUE
;
4993 /* Overlay handling. We handle overlays with some static variables. */
4995 /* The overlay virtual address. */
4996 static etree_type
*overlay_vma
;
4997 /* And subsection alignment. */
4998 static etree_type
*overlay_subalign
;
5000 /* An expression for the maximum section size seen so far. */
5001 static etree_type
*overlay_max
;
5003 /* A list of all the sections in this overlay. */
5005 struct overlay_list
{
5006 struct overlay_list
*next
;
5007 lang_output_section_statement_type
*os
;
5010 static struct overlay_list
*overlay_list
;
5012 /* Start handling an overlay. */
5015 lang_enter_overlay (etree_type
*vma_expr
, etree_type
*subalign
)
5017 /* The grammar should prevent nested overlays from occurring. */
5018 ASSERT (overlay_vma
== NULL
5019 && overlay_subalign
== NULL
5020 && overlay_max
== NULL
);
5022 overlay_vma
= vma_expr
;
5023 overlay_subalign
= subalign
;
5026 /* Start a section in an overlay. We handle this by calling
5027 lang_enter_output_section_statement with the correct VMA.
5028 lang_leave_overlay sets up the LMA and memory regions. */
5031 lang_enter_overlay_section (const char *name
)
5033 struct overlay_list
*n
;
5036 lang_enter_output_section_statement (name
, overlay_vma
, normal_section
,
5037 0, overlay_subalign
, 0, 0);
5039 /* If this is the first section, then base the VMA of future
5040 sections on this one. This will work correctly even if `.' is
5041 used in the addresses. */
5042 if (overlay_list
== NULL
)
5043 overlay_vma
= exp_nameop (ADDR
, name
);
5045 /* Remember the section. */
5046 n
= xmalloc (sizeof *n
);
5047 n
->os
= current_section
;
5048 n
->next
= overlay_list
;
5051 size
= exp_nameop (SIZEOF
, name
);
5053 /* Arrange to work out the maximum section end address. */
5054 if (overlay_max
== NULL
)
5057 overlay_max
= exp_binop (MAX_K
, overlay_max
, size
);
5060 /* Finish a section in an overlay. There isn't any special to do
5064 lang_leave_overlay_section (fill_type
*fill
,
5065 lang_output_section_phdr_list
*phdrs
)
5072 name
= current_section
->name
;
5074 /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory
5075 region and that no load-time region has been specified. It doesn't
5076 really matter what we say here, since lang_leave_overlay will
5078 lang_leave_output_section_statement (fill
, DEFAULT_MEMORY_REGION
, phdrs
, 0);
5080 /* Define the magic symbols. */
5082 clean
= xmalloc (strlen (name
) + 1);
5084 for (s1
= name
; *s1
!= '\0'; s1
++)
5085 if (ISALNUM (*s1
) || *s1
== '_')
5089 buf
= xmalloc (strlen (clean
) + sizeof "__load_start_");
5090 sprintf (buf
, "__load_start_%s", clean
);
5091 lang_add_assignment (exp_assop ('=', buf
,
5092 exp_nameop (LOADADDR
, name
)));
5094 buf
= xmalloc (strlen (clean
) + sizeof "__load_stop_");
5095 sprintf (buf
, "__load_stop_%s", clean
);
5096 lang_add_assignment (exp_assop ('=', buf
,
5098 exp_nameop (LOADADDR
, name
),
5099 exp_nameop (SIZEOF
, name
))));
5104 /* Finish an overlay. If there are any overlay wide settings, this
5105 looks through all the sections in the overlay and sets them. */
5108 lang_leave_overlay (etree_type
*lma_expr
,
5111 const char *memspec
,
5112 lang_output_section_phdr_list
*phdrs
,
5113 const char *lma_memspec
)
5115 lang_memory_region_type
*region
;
5116 lang_memory_region_type
*lma_region
;
5117 struct overlay_list
*l
;
5118 lang_nocrossref_type
*nocrossref
;
5120 lang_get_regions (®ion
, &lma_region
,
5121 memspec
, lma_memspec
,
5122 lma_expr
!= NULL
, FALSE
);
5126 /* After setting the size of the last section, set '.' to end of the
5128 if (overlay_list
!= NULL
)
5129 overlay_list
->os
->update_dot_tree
5130 = exp_assop ('=', ".", exp_binop ('+', overlay_vma
, overlay_max
));
5135 struct overlay_list
*next
;
5137 if (fill
!= NULL
&& l
->os
->fill
== NULL
)
5140 l
->os
->region
= region
;
5141 l
->os
->lma_region
= lma_region
;
5143 /* The first section has the load address specified in the
5144 OVERLAY statement. The rest are worked out from that.
5145 The base address is not needed (and should be null) if
5146 an LMA region was specified. */
5148 l
->os
->load_base
= lma_expr
;
5149 else if (lma_region
== 0)
5150 l
->os
->load_base
= exp_binop ('+',
5151 exp_nameop (LOADADDR
, l
->next
->os
->name
),
5152 exp_nameop (SIZEOF
, l
->next
->os
->name
));
5154 if (phdrs
!= NULL
&& l
->os
->phdrs
== NULL
)
5155 l
->os
->phdrs
= phdrs
;
5159 lang_nocrossref_type
*nc
;
5161 nc
= xmalloc (sizeof *nc
);
5162 nc
->name
= l
->os
->name
;
5163 nc
->next
= nocrossref
;
5172 if (nocrossref
!= NULL
)
5173 lang_add_nocrossref (nocrossref
);
5176 overlay_list
= NULL
;
5180 /* Version handling. This is only useful for ELF. */
5182 /* This global variable holds the version tree that we build. */
5184 struct bfd_elf_version_tree
*lang_elf_version_info
;
5186 /* If PREV is NULL, return first version pattern matching particular symbol.
5187 If PREV is non-NULL, return first version pattern matching particular
5188 symbol after PREV (previously returned by lang_vers_match). */
5190 static struct bfd_elf_version_expr
*
5191 lang_vers_match (struct bfd_elf_version_expr_head
*head
,
5192 struct bfd_elf_version_expr
*prev
,
5195 const char *cxx_sym
= sym
;
5196 const char *java_sym
= sym
;
5197 struct bfd_elf_version_expr
*expr
= NULL
;
5199 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
5201 cxx_sym
= cplus_demangle (sym
, DMGL_PARAMS
| DMGL_ANSI
);
5205 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
5207 java_sym
= cplus_demangle (sym
, DMGL_JAVA
);
5212 if (head
->htab
&& (prev
== NULL
|| prev
->symbol
))
5214 struct bfd_elf_version_expr e
;
5216 switch (prev
? prev
->mask
: 0)
5219 if (head
->mask
& BFD_ELF_VERSION_C_TYPE
)
5222 expr
= htab_find (head
->htab
, &e
);
5223 while (expr
&& strcmp (expr
->symbol
, sym
) == 0)
5224 if (expr
->mask
== BFD_ELF_VERSION_C_TYPE
)
5230 case BFD_ELF_VERSION_C_TYPE
:
5231 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
5234 expr
= htab_find (head
->htab
, &e
);
5235 while (expr
&& strcmp (expr
->symbol
, cxx_sym
) == 0)
5236 if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
5242 case BFD_ELF_VERSION_CXX_TYPE
:
5243 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
5245 e
.symbol
= java_sym
;
5246 expr
= htab_find (head
->htab
, &e
);
5247 while (expr
&& strcmp (expr
->symbol
, java_sym
) == 0)
5248 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
5259 /* Finally, try the wildcards. */
5260 if (prev
== NULL
|| prev
->symbol
)
5261 expr
= head
->remaining
;
5268 if (expr
->pattern
[0] == '*' && expr
->pattern
[1] == '\0')
5271 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
5273 else if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
5277 if (fnmatch (expr
->pattern
, s
, 0) == 0)
5284 free ((char *) cxx_sym
);
5285 if (java_sym
!= sym
)
5286 free ((char *) java_sym
);
5290 /* Return NULL if the PATTERN argument is a glob pattern, otherwise,
5291 return a string pointing to the symbol name. */
5294 realsymbol (const char *pattern
)
5297 bfd_boolean changed
= FALSE
, backslash
= FALSE
;
5298 char *s
, *symbol
= xmalloc (strlen (pattern
) + 1);
5300 for (p
= pattern
, s
= symbol
; *p
!= '\0'; ++p
)
5302 /* It is a glob pattern only if there is no preceding
5304 if (! backslash
&& (*p
== '?' || *p
== '*' || *p
== '['))
5312 /* Remove the preceding backslash. */
5319 backslash
= *p
== '\\';
5334 /* This is called for each variable name or match expression. */
5336 struct bfd_elf_version_expr
*
5337 lang_new_vers_pattern (struct bfd_elf_version_expr
*orig
,
5341 struct bfd_elf_version_expr
*ret
;
5343 ret
= xmalloc (sizeof *ret
);
5348 ret
->symbol
= realsymbol (new);
5350 if (lang
== NULL
|| strcasecmp (lang
, "C") == 0)
5351 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
5352 else if (strcasecmp (lang
, "C++") == 0)
5353 ret
->mask
= BFD_ELF_VERSION_CXX_TYPE
;
5354 else if (strcasecmp (lang
, "Java") == 0)
5355 ret
->mask
= BFD_ELF_VERSION_JAVA_TYPE
;
5358 einfo (_("%X%P: unknown language `%s' in version information\n"),
5360 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
5363 return ldemul_new_vers_pattern (ret
);
5366 /* This is called for each set of variable names and match
5369 struct bfd_elf_version_tree
*
5370 lang_new_vers_node (struct bfd_elf_version_expr
*globals
,
5371 struct bfd_elf_version_expr
*locals
)
5373 struct bfd_elf_version_tree
*ret
;
5375 ret
= xcalloc (1, sizeof *ret
);
5376 ret
->globals
.list
= globals
;
5377 ret
->locals
.list
= locals
;
5378 ret
->match
= lang_vers_match
;
5379 ret
->name_indx
= (unsigned int) -1;
5383 /* This static variable keeps track of version indices. */
5385 static int version_index
;
5388 version_expr_head_hash (const void *p
)
5390 const struct bfd_elf_version_expr
*e
= p
;
5392 return htab_hash_string (e
->symbol
);
5396 version_expr_head_eq (const void *p1
, const void *p2
)
5398 const struct bfd_elf_version_expr
*e1
= p1
;
5399 const struct bfd_elf_version_expr
*e2
= p2
;
5401 return strcmp (e1
->symbol
, e2
->symbol
) == 0;
5405 lang_finalize_version_expr_head (struct bfd_elf_version_expr_head
*head
)
5408 struct bfd_elf_version_expr
*e
, *next
;
5409 struct bfd_elf_version_expr
**list_loc
, **remaining_loc
;
5411 for (e
= head
->list
; e
; e
= e
->next
)
5415 head
->mask
|= e
->mask
;
5420 head
->htab
= htab_create (count
* 2, version_expr_head_hash
,
5421 version_expr_head_eq
, NULL
);
5422 list_loc
= &head
->list
;
5423 remaining_loc
= &head
->remaining
;
5424 for (e
= head
->list
; e
; e
= next
)
5430 remaining_loc
= &e
->next
;
5434 void **loc
= htab_find_slot (head
->htab
, e
, INSERT
);
5438 struct bfd_elf_version_expr
*e1
, *last
;
5444 if (e1
->mask
== e
->mask
)
5452 while (e1
&& strcmp (e1
->symbol
, e
->symbol
) == 0);
5456 /* This is a duplicate. */
5457 /* FIXME: Memory leak. Sometimes pattern is not
5458 xmalloced alone, but in larger chunk of memory. */
5459 /* free (e->symbol); */
5464 e
->next
= last
->next
;
5472 list_loc
= &e
->next
;
5476 *remaining_loc
= NULL
;
5477 *list_loc
= head
->remaining
;
5480 head
->remaining
= head
->list
;
5483 /* This is called when we know the name and dependencies of the
5487 lang_register_vers_node (const char *name
,
5488 struct bfd_elf_version_tree
*version
,
5489 struct bfd_elf_version_deps
*deps
)
5491 struct bfd_elf_version_tree
*t
, **pp
;
5492 struct bfd_elf_version_expr
*e1
;
5497 if ((name
[0] == '\0' && lang_elf_version_info
!= NULL
)
5498 || (lang_elf_version_info
&& lang_elf_version_info
->name
[0] == '\0'))
5500 einfo (_("%X%P: anonymous version tag cannot be combined"
5501 " with other version tags\n"));
5506 /* Make sure this node has a unique name. */
5507 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
5508 if (strcmp (t
->name
, name
) == 0)
5509 einfo (_("%X%P: duplicate version tag `%s'\n"), name
);
5511 lang_finalize_version_expr_head (&version
->globals
);
5512 lang_finalize_version_expr_head (&version
->locals
);
5514 /* Check the global and local match names, and make sure there
5515 aren't any duplicates. */
5517 for (e1
= version
->globals
.list
; e1
!= NULL
; e1
= e1
->next
)
5519 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
5521 struct bfd_elf_version_expr
*e2
;
5523 if (t
->locals
.htab
&& e1
->symbol
)
5525 e2
= htab_find (t
->locals
.htab
, e1
);
5526 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
5528 if (e1
->mask
== e2
->mask
)
5529 einfo (_("%X%P: duplicate expression `%s'"
5530 " in version information\n"), e1
->symbol
);
5534 else if (!e1
->symbol
)
5535 for (e2
= t
->locals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
5536 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
5537 && e1
->mask
== e2
->mask
)
5538 einfo (_("%X%P: duplicate expression `%s'"
5539 " in version information\n"), e1
->pattern
);
5543 for (e1
= version
->locals
.list
; e1
!= NULL
; e1
= e1
->next
)
5545 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
5547 struct bfd_elf_version_expr
*e2
;
5549 if (t
->globals
.htab
&& e1
->symbol
)
5551 e2
= htab_find (t
->globals
.htab
, e1
);
5552 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
5554 if (e1
->mask
== e2
->mask
)
5555 einfo (_("%X%P: duplicate expression `%s'"
5556 " in version information\n"),
5561 else if (!e1
->symbol
)
5562 for (e2
= t
->globals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
5563 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
5564 && e1
->mask
== e2
->mask
)
5565 einfo (_("%X%P: duplicate expression `%s'"
5566 " in version information\n"), e1
->pattern
);
5570 version
->deps
= deps
;
5571 version
->name
= name
;
5572 if (name
[0] != '\0')
5575 version
->vernum
= version_index
;
5578 version
->vernum
= 0;
5580 for (pp
= &lang_elf_version_info
; *pp
!= NULL
; pp
= &(*pp
)->next
)
5585 /* This is called when we see a version dependency. */
5587 struct bfd_elf_version_deps
*
5588 lang_add_vers_depend (struct bfd_elf_version_deps
*list
, const char *name
)
5590 struct bfd_elf_version_deps
*ret
;
5591 struct bfd_elf_version_tree
*t
;
5593 ret
= xmalloc (sizeof *ret
);
5596 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
5598 if (strcmp (t
->name
, name
) == 0)
5600 ret
->version_needed
= t
;
5605 einfo (_("%X%P: unable to find version dependency `%s'\n"), name
);
5611 lang_do_version_exports_section (void)
5613 struct bfd_elf_version_expr
*greg
= NULL
, *lreg
;
5615 LANG_FOR_EACH_INPUT_STATEMENT (is
)
5617 asection
*sec
= bfd_get_section_by_name (is
->the_bfd
, ".exports");
5625 contents
= xmalloc (len
);
5626 if (!bfd_get_section_contents (is
->the_bfd
, sec
, contents
, 0, len
))
5627 einfo (_("%X%P: unable to read .exports section contents\n"), sec
);
5630 while (p
< contents
+ len
)
5632 greg
= lang_new_vers_pattern (greg
, p
, NULL
);
5633 p
= strchr (p
, '\0') + 1;
5636 /* Do not free the contents, as we used them creating the regex. */
5638 /* Do not include this section in the link. */
5639 sec
->flags
|= SEC_EXCLUDE
;
5642 lreg
= lang_new_vers_pattern (NULL
, "*", NULL
);
5643 lang_register_vers_node (command_line
.version_exports_section
,
5644 lang_new_vers_node (greg
, lreg
), NULL
);
5648 lang_add_unique (const char *name
)
5650 struct unique_sections
*ent
;
5652 for (ent
= unique_section_list
; ent
; ent
= ent
->next
)
5653 if (strcmp (ent
->name
, name
) == 0)
5656 ent
= xmalloc (sizeof *ent
);
5657 ent
->name
= xstrdup (name
);
5658 ent
->next
= unique_section_list
;
5659 unique_section_list
= ent
;