1 /* Linker command language support.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
6 This file is part of GLD, the Gnu Linker.
8 GLD is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GLD is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GLD; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, 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 bfd_boolean stripped_excluded_sections
= FALSE
;
58 static lang_output_section_statement_type
*default_common_section
;
59 static bfd_boolean map_option_f
;
60 static bfd_vma print_dot
;
61 static lang_input_statement_type
*first_file
;
62 static const char *current_target
;
63 static const char *output_target
;
64 static lang_statement_list_type statement_list
;
65 static struct lang_phdr
*lang_phdr_list
;
66 static struct bfd_hash_table lang_definedness_table
;
68 /* Forward declarations. */
69 static void exp_init_os (etree_type
*);
70 static void init_map_userdata (bfd
*, asection
*, void *);
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 /* Exported variables. */
89 lang_output_section_statement_type
*abs_output_section
;
90 lang_statement_list_type lang_output_section_statement
;
91 lang_statement_list_type
*stat_ptr
= &statement_list
;
92 lang_statement_list_type file_chain
= { NULL
, NULL
};
93 struct bfd_sym_chain entry_symbol
= { NULL
, NULL
};
94 static const char *entry_symbol_default
= "start";
95 const char *entry_section
= ".text";
96 bfd_boolean entry_from_cmdline
;
97 bfd_boolean lang_has_input_file
= FALSE
;
98 bfd_boolean had_output_filename
= FALSE
;
99 bfd_boolean lang_float_flag
= FALSE
;
100 bfd_boolean delete_output_file_on_failure
= FALSE
;
101 struct lang_nocrossrefs
*nocrossref_list
;
102 static struct unique_sections
*unique_section_list
;
103 static bfd_boolean ldlang_sysrooted_script
= FALSE
;
104 int lang_statement_iteration
= 0;
106 etree_type
*base
; /* Relocation base - or null */
108 /* Return TRUE if the PATTERN argument is a wildcard pattern.
109 Although backslashes are treated specially if a pattern contains
110 wildcards, we do not consider the mere presence of a backslash to
111 be enough to cause the pattern to be treated as a wildcard.
112 That lets us handle DOS filenames more naturally. */
113 #define wildcardp(pattern) (strpbrk ((pattern), "?*[") != NULL)
115 #define new_stat(x, y) \
116 (x##_type *) new_statement (x##_enum, sizeof (x##_type), y)
118 #define outside_section_address(q) \
119 ((q)->output_offset + (q)->output_section->vma)
121 #define outside_symbol_address(q) \
122 ((q)->value + outside_section_address (q->section))
124 #define SECTION_NAME_MAP_LENGTH (16)
127 stat_alloc (size_t size
)
129 return obstack_alloc (&stat_obstack
, size
);
133 unique_section_p (const asection
*sec
)
135 struct unique_sections
*unam
;
138 if (link_info
.relocatable
139 && sec
->owner
!= NULL
140 && bfd_is_group_section (sec
->owner
, sec
))
144 for (unam
= unique_section_list
; unam
; unam
= unam
->next
)
145 if (wildcardp (unam
->name
)
146 ? fnmatch (unam
->name
, secnam
, 0) == 0
147 : strcmp (unam
->name
, secnam
) == 0)
155 /* Generic traversal routines for finding matching sections. */
157 /* Try processing a section against a wildcard. This just calls
158 the callback unless the filename exclusion list is present
159 and excludes the file. It's hardly ever present so this
160 function is very fast. */
163 walk_wild_consider_section (lang_wild_statement_type
*ptr
,
164 lang_input_statement_type
*file
,
166 struct wildcard_list
*sec
,
170 bfd_boolean skip
= FALSE
;
171 struct name_list
*list_tmp
;
173 /* Don't process sections from files which were
175 for (list_tmp
= sec
->spec
.exclude_name_list
;
177 list_tmp
= list_tmp
->next
)
179 bfd_boolean is_wildcard
= wildcardp (list_tmp
->name
);
181 skip
= fnmatch (list_tmp
->name
, file
->filename
, 0) == 0;
183 skip
= strcmp (list_tmp
->name
, file
->filename
) == 0;
185 /* If this file is part of an archive, and the archive is
186 excluded, exclude this file. */
187 if (! skip
&& file
->the_bfd
!= NULL
188 && file
->the_bfd
->my_archive
!= NULL
189 && file
->the_bfd
->my_archive
->filename
!= NULL
)
192 skip
= fnmatch (list_tmp
->name
,
193 file
->the_bfd
->my_archive
->filename
,
196 skip
= strcmp (list_tmp
->name
,
197 file
->the_bfd
->my_archive
->filename
) == 0;
205 (*callback
) (ptr
, sec
, s
, file
, data
);
208 /* Lowest common denominator routine that can handle everything correctly,
212 walk_wild_section_general (lang_wild_statement_type
*ptr
,
213 lang_input_statement_type
*file
,
218 struct wildcard_list
*sec
;
220 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
222 sec
= ptr
->section_list
;
224 (*callback
) (ptr
, sec
, s
, file
, data
);
228 bfd_boolean skip
= FALSE
;
230 if (sec
->spec
.name
!= NULL
)
232 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
234 if (wildcardp (sec
->spec
.name
))
235 skip
= fnmatch (sec
->spec
.name
, sname
, 0) != 0;
237 skip
= strcmp (sec
->spec
.name
, sname
) != 0;
241 walk_wild_consider_section (ptr
, file
, s
, sec
, callback
, data
);
248 /* Routines to find a single section given its name. If there's more
249 than one section with that name, we report that. */
253 asection
*found_section
;
254 bfd_boolean multiple_sections_found
;
255 } section_iterator_callback_data
;
258 section_iterator_callback (bfd
*bfd ATTRIBUTE_UNUSED
, asection
*s
, void *data
)
260 section_iterator_callback_data
*d
= data
;
262 if (d
->found_section
!= NULL
)
264 d
->multiple_sections_found
= TRUE
;
268 d
->found_section
= s
;
273 find_section (lang_input_statement_type
*file
,
274 struct wildcard_list
*sec
,
275 bfd_boolean
*multiple_sections_found
)
277 section_iterator_callback_data cb_data
= { NULL
, FALSE
};
279 bfd_get_section_by_name_if (file
->the_bfd
, sec
->spec
.name
,
280 section_iterator_callback
, &cb_data
);
281 *multiple_sections_found
= cb_data
.multiple_sections_found
;
282 return cb_data
.found_section
;
285 /* Code for handling simple wildcards without going through fnmatch,
286 which can be expensive because of charset translations etc. */
288 /* A simple wild is a literal string followed by a single '*',
289 where the literal part is at least 4 characters long. */
292 is_simple_wild (const char *name
)
294 size_t len
= strcspn (name
, "*?[");
295 return len
>= 4 && name
[len
] == '*' && name
[len
+ 1] == '\0';
299 match_simple_wild (const char *pattern
, const char *name
)
301 /* The first four characters of the pattern are guaranteed valid
302 non-wildcard characters. So we can go faster. */
303 if (pattern
[0] != name
[0] || pattern
[1] != name
[1]
304 || pattern
[2] != name
[2] || pattern
[3] != name
[3])
309 while (*pattern
!= '*')
310 if (*name
++ != *pattern
++)
316 /* Specialized, optimized routines for handling different kinds of
320 walk_wild_section_specs1_wild0 (lang_wild_statement_type
*ptr
,
321 lang_input_statement_type
*file
,
325 /* We can just do a hash lookup for the section with the right name.
326 But if that lookup discovers more than one section with the name
327 (should be rare), we fall back to the general algorithm because
328 we would otherwise have to sort the sections to make sure they
329 get processed in the bfd's order. */
330 bfd_boolean multiple_sections_found
;
331 struct wildcard_list
*sec0
= ptr
->handler_data
[0];
332 asection
*s0
= find_section (file
, sec0
, &multiple_sections_found
);
334 if (multiple_sections_found
)
335 walk_wild_section_general (ptr
, file
, callback
, data
);
337 walk_wild_consider_section (ptr
, file
, s0
, sec0
, callback
, data
);
341 walk_wild_section_specs1_wild1 (lang_wild_statement_type
*ptr
,
342 lang_input_statement_type
*file
,
347 struct wildcard_list
*wildsec0
= ptr
->handler_data
[0];
349 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
351 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
352 bfd_boolean skip
= !match_simple_wild (wildsec0
->spec
.name
, sname
);
355 walk_wild_consider_section (ptr
, file
, s
, wildsec0
, callback
, data
);
360 walk_wild_section_specs2_wild1 (lang_wild_statement_type
*ptr
,
361 lang_input_statement_type
*file
,
366 struct wildcard_list
*sec0
= ptr
->handler_data
[0];
367 struct wildcard_list
*wildsec1
= ptr
->handler_data
[1];
368 bfd_boolean multiple_sections_found
;
369 asection
*s0
= find_section (file
, sec0
, &multiple_sections_found
);
371 if (multiple_sections_found
)
373 walk_wild_section_general (ptr
, file
, callback
, data
);
377 /* Note that if the section was not found, s0 is NULL and
378 we'll simply never succeed the s == s0 test below. */
379 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
381 /* Recall that in this code path, a section cannot satisfy more
382 than one spec, so if s == s0 then it cannot match
385 walk_wild_consider_section (ptr
, file
, s
, sec0
, callback
, data
);
388 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
389 bfd_boolean skip
= !match_simple_wild (wildsec1
->spec
.name
, sname
);
392 walk_wild_consider_section (ptr
, file
, s
, wildsec1
, callback
,
399 walk_wild_section_specs3_wild2 (lang_wild_statement_type
*ptr
,
400 lang_input_statement_type
*file
,
405 struct wildcard_list
*sec0
= ptr
->handler_data
[0];
406 struct wildcard_list
*wildsec1
= ptr
->handler_data
[1];
407 struct wildcard_list
*wildsec2
= ptr
->handler_data
[2];
408 bfd_boolean multiple_sections_found
;
409 asection
*s0
= find_section (file
, sec0
, &multiple_sections_found
);
411 if (multiple_sections_found
)
413 walk_wild_section_general (ptr
, file
, callback
, data
);
417 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
420 walk_wild_consider_section (ptr
, file
, s
, sec0
, callback
, data
);
423 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
424 bfd_boolean skip
= !match_simple_wild (wildsec1
->spec
.name
, sname
);
427 walk_wild_consider_section (ptr
, file
, s
, wildsec1
, callback
, data
);
430 skip
= !match_simple_wild (wildsec2
->spec
.name
, sname
);
432 walk_wild_consider_section (ptr
, file
, s
, wildsec2
, callback
,
440 walk_wild_section_specs4_wild2 (lang_wild_statement_type
*ptr
,
441 lang_input_statement_type
*file
,
446 struct wildcard_list
*sec0
= ptr
->handler_data
[0];
447 struct wildcard_list
*sec1
= ptr
->handler_data
[1];
448 struct wildcard_list
*wildsec2
= ptr
->handler_data
[2];
449 struct wildcard_list
*wildsec3
= ptr
->handler_data
[3];
450 bfd_boolean multiple_sections_found
;
451 asection
*s0
= find_section (file
, sec0
, &multiple_sections_found
), *s1
;
453 if (multiple_sections_found
)
455 walk_wild_section_general (ptr
, file
, callback
, data
);
459 s1
= find_section (file
, sec1
, &multiple_sections_found
);
460 if (multiple_sections_found
)
462 walk_wild_section_general (ptr
, file
, callback
, data
);
466 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
469 walk_wild_consider_section (ptr
, file
, s
, sec0
, callback
, data
);
472 walk_wild_consider_section (ptr
, file
, s
, sec1
, callback
, data
);
475 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
476 bfd_boolean skip
= !match_simple_wild (wildsec2
->spec
.name
,
480 walk_wild_consider_section (ptr
, file
, s
, wildsec2
, callback
,
484 skip
= !match_simple_wild (wildsec3
->spec
.name
, sname
);
486 walk_wild_consider_section (ptr
, file
, s
, wildsec3
,
494 walk_wild_section (lang_wild_statement_type
*ptr
,
495 lang_input_statement_type
*file
,
499 if (file
->just_syms_flag
)
502 (*ptr
->walk_wild_section_handler
) (ptr
, file
, callback
, data
);
505 /* Returns TRUE when name1 is a wildcard spec that might match
506 something name2 can match. We're conservative: we return FALSE
507 only if the prefixes of name1 and name2 are different up to the
508 first wildcard character. */
511 wild_spec_can_overlap (const char *name1
, const char *name2
)
513 size_t prefix1_len
= strcspn (name1
, "?*[");
514 size_t prefix2_len
= strcspn (name2
, "?*[");
515 size_t min_prefix_len
;
517 /* Note that if there is no wildcard character, then we treat the
518 terminating 0 as part of the prefix. Thus ".text" won't match
519 ".text." or ".text.*", for example. */
520 if (name1
[prefix1_len
] == '\0')
522 if (name2
[prefix2_len
] == '\0')
525 min_prefix_len
= prefix1_len
< prefix2_len
? prefix1_len
: prefix2_len
;
527 return memcmp (name1
, name2
, min_prefix_len
) == 0;
530 /* Select specialized code to handle various kinds of wildcard
534 analyze_walk_wild_section_handler (lang_wild_statement_type
*ptr
)
537 int wild_name_count
= 0;
538 struct wildcard_list
*sec
;
542 ptr
->walk_wild_section_handler
= walk_wild_section_general
;
544 /* Count how many wildcard_specs there are, and how many of those
545 actually use wildcards in the name. Also, bail out if any of the
546 wildcard names are NULL. (Can this actually happen?
547 walk_wild_section used to test for it.) And bail out if any
548 of the wildcards are more complex than a simple string
549 ending in a single '*'. */
550 for (sec
= ptr
->section_list
; sec
!= NULL
; sec
= sec
->next
)
553 if (sec
->spec
.name
== NULL
)
555 if (wildcardp (sec
->spec
.name
))
558 if (!is_simple_wild (sec
->spec
.name
))
563 /* The zero-spec case would be easy to optimize but it doesn't
564 happen in practice. Likewise, more than 4 specs doesn't
565 happen in practice. */
566 if (sec_count
== 0 || sec_count
> 4)
569 /* Check that no two specs can match the same section. */
570 for (sec
= ptr
->section_list
; sec
!= NULL
; sec
= sec
->next
)
572 struct wildcard_list
*sec2
;
573 for (sec2
= sec
->next
; sec2
!= NULL
; sec2
= sec2
->next
)
575 if (wild_spec_can_overlap (sec
->spec
.name
, sec2
->spec
.name
))
580 signature
= (sec_count
<< 8) + wild_name_count
;
584 ptr
->walk_wild_section_handler
= walk_wild_section_specs1_wild0
;
587 ptr
->walk_wild_section_handler
= walk_wild_section_specs1_wild1
;
590 ptr
->walk_wild_section_handler
= walk_wild_section_specs2_wild1
;
593 ptr
->walk_wild_section_handler
= walk_wild_section_specs3_wild2
;
596 ptr
->walk_wild_section_handler
= walk_wild_section_specs4_wild2
;
602 /* Now fill the data array with pointers to the specs, first the
603 specs with non-wildcard names, then the specs with wildcard
604 names. It's OK to process the specs in different order from the
605 given order, because we've already determined that no section
606 will match more than one spec. */
608 for (sec
= ptr
->section_list
; sec
!= NULL
; sec
= sec
->next
)
609 if (!wildcardp (sec
->spec
.name
))
610 ptr
->handler_data
[data_counter
++] = sec
;
611 for (sec
= ptr
->section_list
; sec
!= NULL
; sec
= sec
->next
)
612 if (wildcardp (sec
->spec
.name
))
613 ptr
->handler_data
[data_counter
++] = sec
;
616 /* Handle a wild statement for a single file F. */
619 walk_wild_file (lang_wild_statement_type
*s
,
620 lang_input_statement_type
*f
,
624 if (f
->the_bfd
== NULL
625 || ! bfd_check_format (f
->the_bfd
, bfd_archive
))
626 walk_wild_section (s
, f
, callback
, data
);
631 /* This is an archive file. We must map each member of the
632 archive separately. */
633 member
= bfd_openr_next_archived_file (f
->the_bfd
, NULL
);
634 while (member
!= NULL
)
636 /* When lookup_name is called, it will call the add_symbols
637 entry point for the archive. For each element of the
638 archive which is included, BFD will call ldlang_add_file,
639 which will set the usrdata field of the member to the
640 lang_input_statement. */
641 if (member
->usrdata
!= NULL
)
643 walk_wild_section (s
, member
->usrdata
, callback
, data
);
646 member
= bfd_openr_next_archived_file (f
->the_bfd
, member
);
652 walk_wild (lang_wild_statement_type
*s
, callback_t callback
, void *data
)
654 const char *file_spec
= s
->filename
;
656 if (file_spec
== NULL
)
658 /* Perform the iteration over all files in the list. */
659 LANG_FOR_EACH_INPUT_STATEMENT (f
)
661 walk_wild_file (s
, f
, callback
, data
);
664 else if (wildcardp (file_spec
))
666 LANG_FOR_EACH_INPUT_STATEMENT (f
)
668 if (fnmatch (file_spec
, f
->filename
, FNM_FILE_NAME
) == 0)
669 walk_wild_file (s
, f
, callback
, data
);
674 lang_input_statement_type
*f
;
676 /* Perform the iteration over a single file. */
677 f
= lookup_name (file_spec
);
679 walk_wild_file (s
, f
, callback
, data
);
683 /* lang_for_each_statement walks the parse tree and calls the provided
684 function for each node. */
687 lang_for_each_statement_worker (void (*func
) (lang_statement_union_type
*),
688 lang_statement_union_type
*s
)
690 for (; s
!= NULL
; s
= s
->header
.next
)
694 switch (s
->header
.type
)
696 case lang_constructors_statement_enum
:
697 lang_for_each_statement_worker (func
, constructor_list
.head
);
699 case lang_output_section_statement_enum
:
700 lang_for_each_statement_worker
701 (func
, s
->output_section_statement
.children
.head
);
703 case lang_wild_statement_enum
:
704 lang_for_each_statement_worker (func
,
705 s
->wild_statement
.children
.head
);
707 case lang_group_statement_enum
:
708 lang_for_each_statement_worker (func
,
709 s
->group_statement
.children
.head
);
711 case lang_data_statement_enum
:
712 case lang_reloc_statement_enum
:
713 case lang_object_symbols_statement_enum
:
714 case lang_output_statement_enum
:
715 case lang_target_statement_enum
:
716 case lang_input_section_enum
:
717 case lang_input_statement_enum
:
718 case lang_assignment_statement_enum
:
719 case lang_padding_statement_enum
:
720 case lang_address_statement_enum
:
721 case lang_fill_statement_enum
:
731 lang_for_each_statement (void (*func
) (lang_statement_union_type
*))
733 lang_for_each_statement_worker (func
, statement_list
.head
);
736 /*----------------------------------------------------------------------*/
739 lang_list_init (lang_statement_list_type
*list
)
742 list
->tail
= &list
->head
;
745 /* Build a new statement node for the parse tree. */
747 static lang_statement_union_type
*
748 new_statement (enum statement_enum type
,
750 lang_statement_list_type
*list
)
752 lang_statement_union_type
*new;
754 new = stat_alloc (size
);
755 new->header
.type
= type
;
756 new->header
.next
= NULL
;
757 lang_statement_append (list
, new, &new->header
.next
);
761 /* Build a new input file node for the language. There are several
762 ways in which we treat an input file, eg, we only look at symbols,
763 or prefix it with a -l etc.
765 We can be supplied with requests for input files more than once;
766 they may, for example be split over several lines like foo.o(.text)
767 foo.o(.data) etc, so when asked for a file we check that we haven't
768 got it already so we don't duplicate the bfd. */
770 static lang_input_statement_type
*
771 new_afile (const char *name
,
772 lang_input_file_enum_type file_type
,
774 bfd_boolean add_to_list
)
776 lang_input_statement_type
*p
;
779 p
= new_stat (lang_input_statement
, stat_ptr
);
782 p
= stat_alloc (sizeof (lang_input_statement_type
));
783 p
->header
.next
= NULL
;
786 lang_has_input_file
= TRUE
;
788 p
->sysrooted
= FALSE
;
791 case lang_input_file_is_symbols_only_enum
:
793 p
->is_archive
= FALSE
;
795 p
->local_sym_name
= name
;
796 p
->just_syms_flag
= TRUE
;
797 p
->search_dirs_flag
= FALSE
;
799 case lang_input_file_is_fake_enum
:
801 p
->is_archive
= FALSE
;
803 p
->local_sym_name
= name
;
804 p
->just_syms_flag
= FALSE
;
805 p
->search_dirs_flag
= FALSE
;
807 case lang_input_file_is_l_enum
:
808 p
->is_archive
= TRUE
;
811 p
->local_sym_name
= concat ("-l", name
, NULL
);
812 p
->just_syms_flag
= FALSE
;
813 p
->search_dirs_flag
= TRUE
;
815 case lang_input_file_is_marker_enum
:
817 p
->is_archive
= FALSE
;
819 p
->local_sym_name
= name
;
820 p
->just_syms_flag
= FALSE
;
821 p
->search_dirs_flag
= TRUE
;
823 case lang_input_file_is_search_file_enum
:
824 p
->sysrooted
= ldlang_sysrooted_script
;
826 p
->is_archive
= FALSE
;
828 p
->local_sym_name
= name
;
829 p
->just_syms_flag
= FALSE
;
830 p
->search_dirs_flag
= TRUE
;
832 case lang_input_file_is_file_enum
:
834 p
->is_archive
= FALSE
;
836 p
->local_sym_name
= name
;
837 p
->just_syms_flag
= FALSE
;
838 p
->search_dirs_flag
= FALSE
;
845 p
->next_real_file
= NULL
;
848 p
->dynamic
= config
.dynamic_link
;
849 p
->add_needed
= add_needed
;
850 p
->as_needed
= as_needed
;
851 p
->whole_archive
= whole_archive
;
853 lang_statement_append (&input_file_chain
,
854 (lang_statement_union_type
*) p
,
859 lang_input_statement_type
*
860 lang_add_input_file (const char *name
,
861 lang_input_file_enum_type file_type
,
864 lang_has_input_file
= TRUE
;
865 return new_afile (name
, file_type
, target
, TRUE
);
868 /* Build enough state so that the parser can build its tree. */
873 obstack_begin (&stat_obstack
, 1000);
875 stat_ptr
= &statement_list
;
877 lang_list_init (stat_ptr
);
879 lang_list_init (&input_file_chain
);
880 lang_list_init (&lang_output_section_statement
);
881 lang_list_init (&file_chain
);
882 first_file
= lang_add_input_file (NULL
, lang_input_file_is_marker_enum
,
885 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME
);
887 abs_output_section
->bfd_section
= bfd_abs_section_ptr
;
889 /* The value "3" is ad-hoc, somewhat related to the expected number of
890 DEFINED expressions in a linker script. For most default linker
891 scripts, there are none. Why a hash table then? Well, it's somewhat
892 simpler to re-use working machinery than using a linked list in terms
893 of code-complexity here in ld, besides the initialization which just
894 looks like other code here. */
895 if (!bfd_hash_table_init_n (&lang_definedness_table
,
896 lang_definedness_newfunc
, 3))
897 einfo (_("%P%F: out of memory during initialization"));
899 /* Callers of exp_fold_tree need to increment this. */
900 lang_statement_iteration
= 0;
903 /*----------------------------------------------------------------------
904 A region is an area of memory declared with the
905 MEMORY { name:org=exp, len=exp ... }
908 We maintain a list of all the regions here.
910 If no regions are specified in the script, then the default is used
911 which is created when looked up to be the entire data space.
913 If create is true we are creating a region inside a MEMORY block.
914 In this case it is probably an error to create a region that has
915 already been created. If we are not inside a MEMORY block it is
916 dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION)
917 and so we issue a warning. */
919 static lang_memory_region_type
*lang_memory_region_list
;
920 static lang_memory_region_type
**lang_memory_region_list_tail
921 = &lang_memory_region_list
;
923 lang_memory_region_type
*
924 lang_memory_region_lookup (const char *const name
, bfd_boolean create
)
926 lang_memory_region_type
*p
;
927 lang_memory_region_type
*new;
929 /* NAME is NULL for LMA memspecs if no region was specified. */
933 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
934 if (strcmp (p
->name
, name
) == 0)
937 einfo (_("%P:%S: warning: redeclaration of memory region '%s'\n"),
942 if (!create
&& strcmp (name
, DEFAULT_MEMORY_REGION
))
943 einfo (_("%P:%S: warning: memory region %s not declared\n"), name
);
945 new = stat_alloc (sizeof (lang_memory_region_type
));
947 new->name
= xstrdup (name
);
950 *lang_memory_region_list_tail
= new;
951 lang_memory_region_list_tail
= &new->next
;
955 new->length
= ~(bfd_size_type
) 0;
957 new->had_full_message
= FALSE
;
962 static lang_memory_region_type
*
963 lang_memory_default (asection
*section
)
965 lang_memory_region_type
*p
;
967 flagword sec_flags
= section
->flags
;
969 /* Override SEC_DATA to mean a writable section. */
970 if ((sec_flags
& (SEC_ALLOC
| SEC_READONLY
| SEC_CODE
)) == SEC_ALLOC
)
971 sec_flags
|= SEC_DATA
;
973 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
975 if ((p
->flags
& sec_flags
) != 0
976 && (p
->not_flags
& sec_flags
) == 0)
981 return lang_memory_region_lookup (DEFAULT_MEMORY_REGION
, FALSE
);
984 static lang_output_section_statement_type
*
985 lang_output_section_find_1 (const char *const name
, int constraint
)
987 lang_output_section_statement_type
*lookup
;
989 for (lookup
= &lang_output_section_statement
.head
->output_section_statement
;
991 lookup
= lookup
->next
)
993 if (strcmp (name
, lookup
->name
) == 0
994 && lookup
->constraint
!= -1
996 || (constraint
== lookup
->constraint
997 && constraint
!= SPECIAL
)))
1003 lang_output_section_statement_type
*
1004 lang_output_section_find (const char *const name
)
1006 return lang_output_section_find_1 (name
, 0);
1009 static lang_output_section_statement_type
*
1010 lang_output_section_statement_lookup_1 (const char *const name
, int constraint
)
1012 lang_output_section_statement_type
*lookup
;
1014 lookup
= lang_output_section_find_1 (name
, constraint
);
1017 lookup
= new_stat (lang_output_section_statement
, stat_ptr
);
1018 lookup
->region
= NULL
;
1019 lookup
->lma_region
= NULL
;
1021 lookup
->block_value
= 1;
1022 lookup
->name
= name
;
1024 lookup
->next
= NULL
;
1025 lookup
->bfd_section
= NULL
;
1026 lookup
->processed
= 0;
1027 lookup
->constraint
= constraint
;
1028 lookup
->ignored
= FALSE
;
1029 lookup
->sectype
= normal_section
;
1030 lookup
->addr_tree
= NULL
;
1031 lang_list_init (&lookup
->children
);
1033 lookup
->memspec
= NULL
;
1035 lookup
->subsection_alignment
= -1;
1036 lookup
->section_alignment
= -1;
1037 lookup
->load_base
= NULL
;
1038 lookup
->update_dot_tree
= NULL
;
1039 lookup
->phdrs
= NULL
;
1041 lang_statement_append (&lang_output_section_statement
,
1042 (lang_statement_union_type
*) lookup
,
1043 (lang_statement_union_type
**) &lookup
->next
);
1048 lang_output_section_statement_type
*
1049 lang_output_section_statement_lookup (const char *const name
)
1051 return lang_output_section_statement_lookup_1 (name
, 0);
1054 /* A variant of lang_output_section_find used by place_orphan.
1055 Returns the output statement that should precede a new output
1056 statement for SEC. If an exact match is found on certain flags,
1059 lang_output_section_statement_type
*
1060 lang_output_section_find_by_flags (const asection
*sec
,
1061 lang_output_section_statement_type
**exact
)
1063 lang_output_section_statement_type
*first
, *look
, *found
;
1066 /* We know the first statement on this list is *ABS*. May as well
1068 first
= &lang_output_section_statement
.head
->output_section_statement
;
1069 first
= first
->next
;
1071 /* First try for an exact match. */
1073 for (look
= first
; look
; look
= look
->next
)
1075 flags
= look
->flags
;
1076 if (look
->bfd_section
!= NULL
)
1077 flags
= look
->bfd_section
->flags
;
1078 flags
^= sec
->flags
;
1079 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1080 | SEC_CODE
| SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1089 if (sec
->flags
& SEC_CODE
)
1091 /* Try for a rw code section. */
1092 for (look
= first
; look
; look
= look
->next
)
1094 flags
= look
->flags
;
1095 if (look
->bfd_section
!= NULL
)
1096 flags
= look
->bfd_section
->flags
;
1097 flags
^= sec
->flags
;
1098 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1099 | SEC_CODE
| SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1105 if (sec
->flags
& (SEC_READONLY
| SEC_THREAD_LOCAL
))
1107 /* .rodata can go after .text, .sdata2 after .rodata. */
1108 for (look
= first
; look
; look
= look
->next
)
1110 flags
= look
->flags
;
1111 if (look
->bfd_section
!= NULL
)
1112 flags
= look
->bfd_section
->flags
;
1113 flags
^= sec
->flags
;
1114 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1116 && !(look
->flags
& (SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1122 if (sec
->flags
& SEC_SMALL_DATA
)
1124 /* .sdata goes after .data, .sbss after .sdata. */
1125 for (look
= first
; look
; look
= look
->next
)
1127 flags
= look
->flags
;
1128 if (look
->bfd_section
!= NULL
)
1129 flags
= look
->bfd_section
->flags
;
1130 flags
^= sec
->flags
;
1131 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1132 | SEC_THREAD_LOCAL
))
1133 || ((look
->flags
& SEC_SMALL_DATA
)
1134 && !(sec
->flags
& SEC_HAS_CONTENTS
)))
1140 if (sec
->flags
& SEC_HAS_CONTENTS
)
1142 /* .data goes after .rodata. */
1143 for (look
= first
; look
; look
= look
->next
)
1145 flags
= look
->flags
;
1146 if (look
->bfd_section
!= NULL
)
1147 flags
= look
->bfd_section
->flags
;
1148 flags
^= sec
->flags
;
1149 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1150 | SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1156 /* .bss goes last. */
1157 for (look
= first
; look
; look
= look
->next
)
1159 flags
= look
->flags
;
1160 if (look
->bfd_section
!= NULL
)
1161 flags
= look
->bfd_section
->flags
;
1162 flags
^= sec
->flags
;
1163 if (!(flags
& SEC_ALLOC
))
1170 /* Find the last output section before given output statement.
1171 Used by place_orphan. */
1174 output_prev_sec_find (lang_output_section_statement_type
*os
)
1176 asection
*s
= (asection
*) NULL
;
1177 lang_output_section_statement_type
*lookup
;
1179 for (lookup
= &lang_output_section_statement
.head
->output_section_statement
;
1181 lookup
= lookup
->next
)
1183 if (lookup
->constraint
== -1)
1188 if (lookup
->bfd_section
!= NULL
&& lookup
->bfd_section
->owner
!= NULL
)
1189 s
= lookup
->bfd_section
;
1195 lang_output_section_statement_type
*
1196 lang_insert_orphan (lang_input_statement_type
*file
,
1198 const char *secname
,
1199 lang_output_section_statement_type
*after
,
1200 struct orphan_save
*place
,
1201 etree_type
*address
,
1202 lang_statement_list_type
*add_child
)
1204 lang_statement_list_type
*old
;
1205 lang_statement_list_type add
;
1207 etree_type
*load_base
;
1208 lang_output_section_statement_type
*os
;
1209 lang_output_section_statement_type
**os_tail
;
1211 /* Start building a list of statements for this section.
1212 First save the current statement pointer. */
1215 /* If we have found an appropriate place for the output section
1216 statements for this orphan, add them to our own private list,
1217 inserting them later into the global statement list. */
1221 lang_list_init (stat_ptr
);
1225 if (config
.build_constructors
)
1227 /* If the name of the section is representable in C, then create
1228 symbols to mark the start and the end of the section. */
1229 for (ps
= secname
; *ps
!= '\0'; ps
++)
1230 if (! ISALNUM ((unsigned char) *ps
) && *ps
!= '_')
1235 etree_type
*e_align
;
1237 symname
= (char *) xmalloc (ps
- secname
+ sizeof "__start_" + 1);
1238 symname
[0] = bfd_get_symbol_leading_char (output_bfd
);
1239 sprintf (symname
+ (symname
[0] != 0), "__start_%s", secname
);
1240 e_align
= exp_unop (ALIGN_K
,
1241 exp_intop ((bfd_vma
) 1 << s
->alignment_power
));
1242 lang_add_assignment (exp_assop ('=', ".", e_align
));
1243 lang_add_assignment (exp_assop ('=', symname
,
1244 exp_nameop (NAME
, ".")));
1248 if (link_info
.relocatable
|| (s
->flags
& (SEC_LOAD
| SEC_ALLOC
)) == 0)
1249 address
= exp_intop (0);
1252 if (after
!= NULL
&& after
->load_base
!= NULL
)
1254 etree_type
*lma_from_vma
;
1255 lma_from_vma
= exp_binop ('-', after
->load_base
,
1256 exp_nameop (ADDR
, after
->name
));
1257 load_base
= exp_binop ('+', lma_from_vma
,
1258 exp_nameop (ADDR
, secname
));
1261 os_tail
= ((lang_output_section_statement_type
**)
1262 lang_output_section_statement
.tail
);
1263 os
= lang_enter_output_section_statement (secname
, address
, 0, NULL
, NULL
,
1266 if (add_child
== NULL
)
1267 add_child
= &os
->children
;
1268 lang_add_section (add_child
, s
, os
, file
);
1270 lang_leave_output_section_statement (0, "*default*", NULL
, NULL
);
1272 if (config
.build_constructors
&& *ps
== '\0')
1276 /* lang_leave_ouput_section_statement resets stat_ptr.
1277 Put stat_ptr back where we want it. */
1281 symname
= (char *) xmalloc (ps
- secname
+ sizeof "__stop_" + 1);
1282 symname
[0] = bfd_get_symbol_leading_char (output_bfd
);
1283 sprintf (symname
+ (symname
[0] != 0), "__stop_%s", secname
);
1284 lang_add_assignment (exp_assop ('=', symname
,
1285 exp_nameop (NAME
, ".")));
1288 /* Restore the global list pointer. */
1292 if (after
!= NULL
&& os
->bfd_section
!= NULL
)
1294 asection
*snew
, *as
;
1296 snew
= os
->bfd_section
;
1298 /* Shuffle the bfd section list to make the output file look
1299 neater. This is really only cosmetic. */
1300 if (place
->section
== NULL
1301 && after
!= (&lang_output_section_statement
.head
1302 ->output_section_statement
))
1304 asection
*bfd_section
= after
->bfd_section
;
1306 /* If the output statement hasn't been used to place any input
1307 sections (and thus doesn't have an output bfd_section),
1308 look for the closest prior output statement having an
1310 if (bfd_section
== NULL
)
1311 bfd_section
= output_prev_sec_find (after
);
1313 if (bfd_section
!= NULL
&& bfd_section
!= snew
)
1314 place
->section
= &bfd_section
->next
;
1317 if (place
->section
== NULL
)
1318 place
->section
= &output_bfd
->sections
;
1320 as
= *place
->section
;
1321 if (as
!= snew
&& as
->prev
!= snew
)
1323 /* Unlink the section. */
1324 bfd_section_list_remove (output_bfd
, snew
);
1326 /* Now tack it back on in the right place. */
1327 bfd_section_list_insert_before (output_bfd
, as
, snew
);
1330 /* Save the end of this list. Further ophans of this type will
1331 follow the one we've just added. */
1332 place
->section
= &snew
->next
;
1334 /* The following is non-cosmetic. We try to put the output
1335 statements in some sort of reasonable order here, because they
1336 determine the final load addresses of the orphan sections.
1337 In addition, placing output statements in the wrong order may
1338 require extra segments. For instance, given a typical
1339 situation of all read-only sections placed in one segment and
1340 following that a segment containing all the read-write
1341 sections, we wouldn't want to place an orphan read/write
1342 section before or amongst the read-only ones. */
1343 if (add
.head
!= NULL
)
1345 lang_output_section_statement_type
*newly_added_os
;
1347 if (place
->stmt
== NULL
)
1349 lang_statement_union_type
**where
;
1350 lang_statement_union_type
**assign
= NULL
;
1352 /* Look for a suitable place for the new statement list.
1353 The idea is to skip over anything that might be inside
1354 a SECTIONS {} statement in a script, before we find
1355 another output_section_statement. Assignments to "dot"
1356 before an output section statement are assumed to
1358 for (where
= &after
->header
.next
;
1360 where
= &(*where
)->header
.next
)
1362 switch ((*where
)->header
.type
)
1364 case lang_assignment_statement_enum
:
1367 lang_assignment_statement_type
*ass
;
1368 ass
= &(*where
)->assignment_statement
;
1369 if (ass
->exp
->type
.node_class
!= etree_assert
1370 && ass
->exp
->assign
.dst
[0] == '.'
1371 && ass
->exp
->assign
.dst
[1] == 0)
1375 case lang_wild_statement_enum
:
1376 case lang_input_section_enum
:
1377 case lang_object_symbols_statement_enum
:
1378 case lang_fill_statement_enum
:
1379 case lang_data_statement_enum
:
1380 case lang_reloc_statement_enum
:
1381 case lang_padding_statement_enum
:
1382 case lang_constructors_statement_enum
:
1385 case lang_output_section_statement_enum
:
1388 case lang_input_statement_enum
:
1389 case lang_address_statement_enum
:
1390 case lang_target_statement_enum
:
1391 case lang_output_statement_enum
:
1392 case lang_group_statement_enum
:
1393 case lang_afile_asection_pair_statement_enum
:
1402 place
->os_tail
= &after
->next
;
1406 /* Put it after the last orphan statement we added. */
1407 *add
.tail
= *place
->stmt
;
1408 *place
->stmt
= add
.head
;
1411 /* Fix the global list pointer if we happened to tack our
1412 new list at the tail. */
1413 if (*old
->tail
== add
.head
)
1414 old
->tail
= add
.tail
;
1416 /* Save the end of this list. */
1417 place
->stmt
= add
.tail
;
1419 /* Do the same for the list of output section statements. */
1420 newly_added_os
= *os_tail
;
1422 newly_added_os
->next
= *place
->os_tail
;
1423 *place
->os_tail
= newly_added_os
;
1424 place
->os_tail
= &newly_added_os
->next
;
1426 /* Fixing the global list pointer here is a little different.
1427 We added to the list in lang_enter_output_section_statement,
1428 trimmed off the new output_section_statment above when
1429 assigning *os_tail = NULL, but possibly added it back in
1430 the same place when assigning *place->os_tail. */
1431 if (*os_tail
== NULL
)
1432 lang_output_section_statement
.tail
1433 = (lang_statement_union_type
**) os_tail
;
1440 lang_map_flags (flagword flag
)
1442 if (flag
& SEC_ALLOC
)
1445 if (flag
& SEC_CODE
)
1448 if (flag
& SEC_READONLY
)
1451 if (flag
& SEC_DATA
)
1454 if (flag
& SEC_LOAD
)
1461 lang_memory_region_type
*m
;
1464 minfo (_("\nMemory Configuration\n\n"));
1465 fprintf (config
.map_file
, "%-16s %-18s %-18s %s\n",
1466 _("Name"), _("Origin"), _("Length"), _("Attributes"));
1468 for (m
= lang_memory_region_list
; m
!= NULL
; m
= m
->next
)
1473 fprintf (config
.map_file
, "%-16s ", m
->name
);
1475 sprintf_vma (buf
, m
->origin
);
1476 minfo ("0x%s ", buf
);
1484 minfo ("0x%V", m
->length
);
1485 if (m
->flags
|| m
->not_flags
)
1493 lang_map_flags (m
->flags
);
1499 lang_map_flags (m
->not_flags
);
1506 fprintf (config
.map_file
, _("\nLinker script and memory map\n\n"));
1508 if (! command_line
.reduce_memory_overheads
)
1510 obstack_begin (&map_obstack
, 1000);
1511 for (p
= link_info
.input_bfds
; p
!= (bfd
*) NULL
; p
= p
->link_next
)
1512 bfd_map_over_sections (p
, init_map_userdata
, 0);
1513 bfd_link_hash_traverse (link_info
.hash
, sort_def_symbol
, 0);
1515 print_statements ();
1519 init_map_userdata (abfd
, sec
, data
)
1520 bfd
*abfd ATTRIBUTE_UNUSED
;
1522 void *data ATTRIBUTE_UNUSED
;
1524 fat_section_userdata_type
*new_data
1525 = ((fat_section_userdata_type
*) (stat_alloc
1526 (sizeof (fat_section_userdata_type
))));
1528 ASSERT (get_userdata (sec
) == NULL
);
1529 get_userdata (sec
) = new_data
;
1530 new_data
->map_symbol_def_tail
= &new_data
->map_symbol_def_head
;
1534 sort_def_symbol (hash_entry
, info
)
1535 struct bfd_link_hash_entry
*hash_entry
;
1536 void *info ATTRIBUTE_UNUSED
;
1538 if (hash_entry
->type
== bfd_link_hash_defined
1539 || hash_entry
->type
== bfd_link_hash_defweak
)
1541 struct fat_user_section_struct
*ud
;
1542 struct map_symbol_def
*def
;
1544 ud
= get_userdata (hash_entry
->u
.def
.section
);
1547 /* ??? What do we have to do to initialize this beforehand? */
1548 /* The first time we get here is bfd_abs_section... */
1549 init_map_userdata (0, hash_entry
->u
.def
.section
, 0);
1550 ud
= get_userdata (hash_entry
->u
.def
.section
);
1552 else if (!ud
->map_symbol_def_tail
)
1553 ud
->map_symbol_def_tail
= &ud
->map_symbol_def_head
;
1555 def
= obstack_alloc (&map_obstack
, sizeof *def
);
1556 def
->entry
= hash_entry
;
1557 *(ud
->map_symbol_def_tail
) = def
;
1558 ud
->map_symbol_def_tail
= &def
->next
;
1563 /* Initialize an output section. */
1566 init_os (lang_output_section_statement_type
*s
)
1568 if (s
->bfd_section
!= NULL
)
1571 if (strcmp (s
->name
, DISCARD_SECTION_NAME
) == 0)
1572 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME
);
1574 s
->bfd_section
= bfd_get_section_by_name (output_bfd
, s
->name
);
1575 if (s
->bfd_section
== NULL
)
1576 s
->bfd_section
= bfd_make_section (output_bfd
, s
->name
);
1577 if (s
->bfd_section
== NULL
)
1579 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
1580 output_bfd
->xvec
->name
, s
->name
);
1582 s
->bfd_section
->output_section
= s
->bfd_section
;
1584 /* We initialize an output sections output offset to minus its own
1585 vma to allow us to output a section through itself. */
1586 s
->bfd_section
->output_offset
= 0;
1587 if (!command_line
.reduce_memory_overheads
)
1589 fat_section_userdata_type
*new
1590 = stat_alloc (sizeof (fat_section_userdata_type
));
1591 memset (new, 0, sizeof (fat_section_userdata_type
));
1592 get_userdata (s
->bfd_section
) = new;
1596 /* If there is a base address, make sure that any sections it might
1597 mention are initialized. */
1598 if (s
->addr_tree
!= NULL
)
1599 exp_init_os (s
->addr_tree
);
1601 if (s
->load_base
!= NULL
)
1602 exp_init_os (s
->load_base
);
1605 /* Make sure that all output sections mentioned in an expression are
1609 exp_init_os (etree_type
*exp
)
1611 switch (exp
->type
.node_class
)
1614 exp_init_os (exp
->assign
.src
);
1618 exp_init_os (exp
->binary
.lhs
);
1619 exp_init_os (exp
->binary
.rhs
);
1623 exp_init_os (exp
->trinary
.cond
);
1624 exp_init_os (exp
->trinary
.lhs
);
1625 exp_init_os (exp
->trinary
.rhs
);
1629 exp_init_os (exp
->assert_s
.child
);
1633 exp_init_os (exp
->unary
.child
);
1637 switch (exp
->type
.node_code
)
1643 lang_output_section_statement_type
*os
;
1645 os
= lang_output_section_find (exp
->name
.name
);
1646 if (os
!= NULL
&& os
->bfd_section
== NULL
)
1658 section_already_linked (bfd
*abfd
, asection
*sec
, void *data
)
1660 lang_input_statement_type
*entry
= data
;
1662 /* If we are only reading symbols from this object, then we want to
1663 discard all sections. */
1664 if (entry
->just_syms_flag
)
1666 bfd_link_just_syms (abfd
, sec
, &link_info
);
1670 if (!(abfd
->flags
& DYNAMIC
))
1671 bfd_section_already_linked (abfd
, sec
);
1674 /* The wild routines.
1676 These expand statements like *(.text) and foo.o to a list of
1677 explicit actions, like foo.o(.text), bar.o(.text) and
1678 foo.o(.text, .data). */
1680 /* Add SECTION to the output section OUTPUT. Do this by creating a
1681 lang_input_section statement which is placed at PTR. FILE is the
1682 input file which holds SECTION. */
1685 lang_add_section (lang_statement_list_type
*ptr
,
1687 lang_output_section_statement_type
*output
,
1688 lang_input_statement_type
*file
)
1690 flagword flags
= section
->flags
;
1691 bfd_boolean discard
;
1693 /* Discard sections marked with SEC_EXCLUDE. */
1694 discard
= (flags
& SEC_EXCLUDE
) != 0;
1696 /* Discard input sections which are assigned to a section named
1697 DISCARD_SECTION_NAME. */
1698 if (strcmp (output
->name
, DISCARD_SECTION_NAME
) == 0)
1701 /* Discard debugging sections if we are stripping debugging
1703 if ((link_info
.strip
== strip_debugger
|| link_info
.strip
== strip_all
)
1704 && (flags
& SEC_DEBUGGING
) != 0)
1709 if (section
->output_section
== NULL
)
1711 /* This prevents future calls from assigning this section. */
1712 section
->output_section
= bfd_abs_section_ptr
;
1717 if (section
->output_section
== NULL
)
1720 lang_input_section_type
*new;
1723 if (output
->bfd_section
== NULL
)
1726 first
= ! output
->bfd_section
->linker_has_input
;
1727 output
->bfd_section
->linker_has_input
= 1;
1729 if (!link_info
.relocatable
1730 && !stripped_excluded_sections
)
1732 asection
*s
= output
->bfd_section
->map_tail
.s
;
1733 output
->bfd_section
->map_tail
.s
= section
;
1734 section
->map_head
.s
= NULL
;
1735 section
->map_tail
.s
= s
;
1737 s
->map_head
.s
= section
;
1739 output
->bfd_section
->map_head
.s
= section
;
1742 /* Add a section reference to the list. */
1743 new = new_stat (lang_input_section
, ptr
);
1745 new->section
= section
;
1747 section
->output_section
= output
->bfd_section
;
1749 flags
= section
->flags
;
1751 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1752 to an output section, because we want to be able to include a
1753 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1754 section (I don't know why we want to do this, but we do).
1755 build_link_order in ldwrite.c handles this case by turning
1756 the embedded SEC_NEVER_LOAD section into a fill. */
1758 flags
&= ~ SEC_NEVER_LOAD
;
1760 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1761 already been processed. One reason to do this is that on pe
1762 format targets, .text$foo sections go into .text and it's odd
1763 to see .text with SEC_LINK_ONCE set. */
1765 if (! link_info
.relocatable
)
1766 flags
&= ~ (SEC_LINK_ONCE
| SEC_LINK_DUPLICATES
);
1768 /* If this is not the first input section, and the SEC_READONLY
1769 flag is not currently set, then don't set it just because the
1770 input section has it set. */
1772 if (! first
&& (output
->bfd_section
->flags
& SEC_READONLY
) == 0)
1773 flags
&= ~ SEC_READONLY
;
1775 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1777 && ((output
->bfd_section
->flags
& (SEC_MERGE
| SEC_STRINGS
))
1778 != (flags
& (SEC_MERGE
| SEC_STRINGS
))
1779 || ((flags
& SEC_MERGE
)
1780 && output
->bfd_section
->entsize
!= section
->entsize
)))
1782 output
->bfd_section
->flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1783 flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1786 output
->bfd_section
->flags
|= flags
;
1788 if (flags
& SEC_MERGE
)
1789 output
->bfd_section
->entsize
= section
->entsize
;
1791 /* If SEC_READONLY is not set in the input section, then clear
1792 it from the output section. */
1793 if ((section
->flags
& SEC_READONLY
) == 0)
1794 output
->bfd_section
->flags
&= ~SEC_READONLY
;
1796 switch (output
->sectype
)
1798 case normal_section
:
1803 case overlay_section
:
1804 output
->bfd_section
->flags
&= ~SEC_ALLOC
;
1806 case noload_section
:
1807 output
->bfd_section
->flags
&= ~SEC_LOAD
;
1808 output
->bfd_section
->flags
|= SEC_NEVER_LOAD
;
1812 /* Copy over SEC_SMALL_DATA. */
1813 if (section
->flags
& SEC_SMALL_DATA
)
1814 output
->bfd_section
->flags
|= SEC_SMALL_DATA
;
1816 if (section
->alignment_power
> output
->bfd_section
->alignment_power
)
1817 output
->bfd_section
->alignment_power
= section
->alignment_power
;
1819 /* If supplied an alignment, then force it. */
1820 if (output
->section_alignment
!= -1)
1821 output
->bfd_section
->alignment_power
= output
->section_alignment
;
1823 if (bfd_get_arch (section
->owner
) == bfd_arch_tic54x
1824 && (section
->flags
& SEC_TIC54X_BLOCK
) != 0)
1826 output
->bfd_section
->flags
|= SEC_TIC54X_BLOCK
;
1827 /* FIXME: This value should really be obtained from the bfd... */
1828 output
->block_value
= 128;
1833 /* Compare sections ASEC and BSEC according to SORT. */
1836 compare_section (sort_type sort
, asection
*asec
, asection
*bsec
)
1845 case by_alignment_name
:
1846 ret
= (bfd_section_alignment (bsec
->owner
, bsec
)
1847 - bfd_section_alignment (asec
->owner
, asec
));
1853 ret
= strcmp (bfd_get_section_name (asec
->owner
, asec
),
1854 bfd_get_section_name (bsec
->owner
, bsec
));
1857 case by_name_alignment
:
1858 ret
= strcmp (bfd_get_section_name (asec
->owner
, asec
),
1859 bfd_get_section_name (bsec
->owner
, bsec
));
1865 ret
= (bfd_section_alignment (bsec
->owner
, bsec
)
1866 - bfd_section_alignment (asec
->owner
, asec
));
1873 /* Handle wildcard sorting. This returns the lang_input_section which
1874 should follow the one we are going to create for SECTION and FILE,
1875 based on the sorting requirements of WILD. It returns NULL if the
1876 new section should just go at the end of the current list. */
1878 static lang_statement_union_type
*
1879 wild_sort (lang_wild_statement_type
*wild
,
1880 struct wildcard_list
*sec
,
1881 lang_input_statement_type
*file
,
1884 const char *section_name
;
1885 lang_statement_union_type
*l
;
1887 if (!wild
->filenames_sorted
1888 && (sec
== NULL
|| sec
->spec
.sorted
== none
))
1891 section_name
= bfd_get_section_name (file
->the_bfd
, section
);
1892 for (l
= wild
->children
.head
; l
!= NULL
; l
= l
->header
.next
)
1894 lang_input_section_type
*ls
;
1896 if (l
->header
.type
!= lang_input_section_enum
)
1898 ls
= &l
->input_section
;
1900 /* Sorting by filename takes precedence over sorting by section
1903 if (wild
->filenames_sorted
)
1905 const char *fn
, *ln
;
1909 /* The PE support for the .idata section as generated by
1910 dlltool assumes that files will be sorted by the name of
1911 the archive and then the name of the file within the
1914 if (file
->the_bfd
!= NULL
1915 && bfd_my_archive (file
->the_bfd
) != NULL
)
1917 fn
= bfd_get_filename (bfd_my_archive (file
->the_bfd
));
1922 fn
= file
->filename
;
1926 if (ls
->ifile
->the_bfd
!= NULL
1927 && bfd_my_archive (ls
->ifile
->the_bfd
) != NULL
)
1929 ln
= bfd_get_filename (bfd_my_archive (ls
->ifile
->the_bfd
));
1934 ln
= ls
->ifile
->filename
;
1938 i
= strcmp (fn
, ln
);
1947 fn
= file
->filename
;
1949 ln
= ls
->ifile
->filename
;
1951 i
= strcmp (fn
, ln
);
1959 /* Here either the files are not sorted by name, or we are
1960 looking at the sections for this file. */
1962 if (sec
!= NULL
&& sec
->spec
.sorted
!= none
)
1964 if (compare_section (sec
->spec
.sorted
, section
,
1973 /* Expand a wild statement for a particular FILE. SECTION may be
1974 NULL, in which case it is a wild card. */
1977 output_section_callback (lang_wild_statement_type
*ptr
,
1978 struct wildcard_list
*sec
,
1980 lang_input_statement_type
*file
,
1983 lang_statement_union_type
*before
;
1985 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1986 if (unique_section_p (section
))
1989 before
= wild_sort (ptr
, sec
, file
, section
);
1991 /* Here BEFORE points to the lang_input_section which
1992 should follow the one we are about to add. If BEFORE
1993 is NULL, then the section should just go at the end
1994 of the current list. */
1997 lang_add_section (&ptr
->children
, section
,
1998 (lang_output_section_statement_type
*) output
,
2002 lang_statement_list_type list
;
2003 lang_statement_union_type
**pp
;
2005 lang_list_init (&list
);
2006 lang_add_section (&list
, section
,
2007 (lang_output_section_statement_type
*) output
,
2010 /* If we are discarding the section, LIST.HEAD will
2012 if (list
.head
!= NULL
)
2014 ASSERT (list
.head
->header
.next
== NULL
);
2016 for (pp
= &ptr
->children
.head
;
2018 pp
= &(*pp
)->header
.next
)
2019 ASSERT (*pp
!= NULL
);
2021 list
.head
->header
.next
= *pp
;
2027 /* Check if all sections in a wild statement for a particular FILE
2031 check_section_callback (lang_wild_statement_type
*ptr ATTRIBUTE_UNUSED
,
2032 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
2034 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
2037 /* Exclude sections that match UNIQUE_SECTION_LIST. */
2038 if (unique_section_p (section
))
2041 if (section
->output_section
== NULL
&& (section
->flags
& SEC_READONLY
) == 0)
2042 ((lang_output_section_statement_type
*) data
)->all_input_readonly
= FALSE
;
2045 /* This is passed a file name which must have been seen already and
2046 added to the statement tree. We will see if it has been opened
2047 already and had its symbols read. If not then we'll read it. */
2049 static lang_input_statement_type
*
2050 lookup_name (const char *name
)
2052 lang_input_statement_type
*search
;
2054 for (search
= (lang_input_statement_type
*) input_file_chain
.head
;
2056 search
= (lang_input_statement_type
*) search
->next_real_file
)
2058 /* Use the local_sym_name as the name of the file that has
2059 already been loaded as filename might have been transformed
2060 via the search directory lookup mechanism. */
2061 const char * filename
= search
->local_sym_name
;
2063 if (filename
== NULL
&& name
== NULL
)
2065 if (filename
!= NULL
2067 && strcmp (filename
, name
) == 0)
2072 search
= new_afile (name
, lang_input_file_is_search_file_enum
,
2073 default_target
, FALSE
);
2075 /* If we have already added this file, or this file is not real
2076 (FIXME: can that ever actually happen?) or the name is NULL
2077 (FIXME: can that ever actually happen?) don't add this file. */
2080 || search
->filename
== NULL
)
2083 if (! load_symbols (search
, NULL
))
2089 /* Save LIST as a list of libraries whose symbols should not be exported. */
2094 struct excluded_lib
*next
;
2096 static struct excluded_lib
*excluded_libs
;
2099 add_excluded_libs (const char *list
)
2101 const char *p
= list
, *end
;
2105 struct excluded_lib
*entry
;
2106 end
= strpbrk (p
, ",:");
2108 end
= p
+ strlen (p
);
2109 entry
= xmalloc (sizeof (*entry
));
2110 entry
->next
= excluded_libs
;
2111 entry
->name
= xmalloc (end
- p
+ 1);
2112 memcpy (entry
->name
, p
, end
- p
);
2113 entry
->name
[end
- p
] = '\0';
2114 excluded_libs
= entry
;
2122 check_excluded_libs (bfd
*abfd
)
2124 struct excluded_lib
*lib
= excluded_libs
;
2128 int len
= strlen (lib
->name
);
2129 const char *filename
= lbasename (abfd
->filename
);
2131 if (strcmp (lib
->name
, "ALL") == 0)
2133 abfd
->no_export
= TRUE
;
2137 if (strncmp (lib
->name
, filename
, len
) == 0
2138 && (filename
[len
] == '\0'
2139 || (filename
[len
] == '.' && filename
[len
+ 1] == 'a'
2140 && filename
[len
+ 2] == '\0')))
2142 abfd
->no_export
= TRUE
;
2150 /* Get the symbols for an input file. */
2153 load_symbols (lang_input_statement_type
*entry
,
2154 lang_statement_list_type
*place
)
2161 ldfile_open_file (entry
);
2163 if (! bfd_check_format (entry
->the_bfd
, bfd_archive
)
2164 && ! bfd_check_format_matches (entry
->the_bfd
, bfd_object
, &matching
))
2167 lang_statement_list_type
*hold
;
2168 bfd_boolean bad_load
= TRUE
;
2169 bfd_boolean save_ldlang_sysrooted_script
;
2171 err
= bfd_get_error ();
2173 /* See if the emulation has some special knowledge. */
2174 if (ldemul_unrecognized_file (entry
))
2177 if (err
== bfd_error_file_ambiguously_recognized
)
2181 einfo (_("%B: file not recognized: %E\n"), entry
->the_bfd
);
2182 einfo (_("%B: matching formats:"), entry
->the_bfd
);
2183 for (p
= matching
; *p
!= NULL
; p
++)
2187 else if (err
!= bfd_error_file_not_recognized
2189 einfo (_("%F%B: file not recognized: %E\n"), entry
->the_bfd
);
2193 bfd_close (entry
->the_bfd
);
2194 entry
->the_bfd
= NULL
;
2196 /* Try to interpret the file as a linker script. */
2197 ldfile_open_command_file (entry
->filename
);
2201 save_ldlang_sysrooted_script
= ldlang_sysrooted_script
;
2202 ldlang_sysrooted_script
= entry
->sysrooted
;
2204 ldfile_assumed_script
= TRUE
;
2205 parser_input
= input_script
;
2206 /* We want to use the same -Bdynamic/-Bstatic as the one for
2208 config
.dynamic_link
= entry
->dynamic
;
2210 ldfile_assumed_script
= FALSE
;
2212 ldlang_sysrooted_script
= save_ldlang_sysrooted_script
;
2218 if (ldemul_recognized_file (entry
))
2221 /* We don't call ldlang_add_file for an archive. Instead, the
2222 add_symbols entry point will call ldlang_add_file, via the
2223 add_archive_element callback, for each element of the archive
2225 switch (bfd_get_format (entry
->the_bfd
))
2231 ldlang_add_file (entry
);
2232 if (trace_files
|| trace_file_tries
)
2233 info_msg ("%I\n", entry
);
2237 check_excluded_libs (entry
->the_bfd
);
2239 if (entry
->whole_archive
)
2242 bfd_boolean loaded
= TRUE
;
2246 member
= bfd_openr_next_archived_file (entry
->the_bfd
, member
);
2251 if (! bfd_check_format (member
, bfd_object
))
2253 einfo (_("%F%B: member %B in archive is not an object\n"),
2254 entry
->the_bfd
, member
);
2258 if (! ((*link_info
.callbacks
->add_archive_element
)
2259 (&link_info
, member
, "--whole-archive")))
2262 if (! bfd_link_add_symbols (member
, &link_info
))
2264 einfo (_("%F%B: could not read symbols: %E\n"), member
);
2269 entry
->loaded
= loaded
;
2275 if (bfd_link_add_symbols (entry
->the_bfd
, &link_info
))
2276 entry
->loaded
= TRUE
;
2278 einfo (_("%F%B: could not read symbols: %E\n"), entry
->the_bfd
);
2280 return entry
->loaded
;
2283 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
2284 may be NULL, indicating that it is a wildcard. Separate
2285 lang_input_section statements are created for each part of the
2286 expansion; they are added after the wild statement S. OUTPUT is
2287 the output section. */
2290 wild (lang_wild_statement_type
*s
,
2291 const char *target ATTRIBUTE_UNUSED
,
2292 lang_output_section_statement_type
*output
)
2294 struct wildcard_list
*sec
;
2296 walk_wild (s
, output_section_callback
, output
);
2298 for (sec
= s
->section_list
; sec
!= NULL
; sec
= sec
->next
)
2300 if (default_common_section
!= NULL
)
2302 if (sec
->spec
.name
!= NULL
&& strcmp (sec
->spec
.name
, "COMMON") == 0)
2304 /* Remember the section that common is going to in case we
2305 later get something which doesn't know where to put it. */
2306 default_common_section
= output
;
2311 /* Return TRUE iff target is the sought target. */
2314 get_target (const bfd_target
*target
, void *data
)
2316 const char *sought
= data
;
2318 return strcmp (target
->name
, sought
) == 0;
2321 /* Like strcpy() but convert to lower case as well. */
2324 stricpy (char *dest
, char *src
)
2328 while ((c
= *src
++) != 0)
2329 *dest
++ = TOLOWER (c
);
2334 /* Remove the first occurrence of needle (if any) in haystack
2338 strcut (char *haystack
, char *needle
)
2340 haystack
= strstr (haystack
, needle
);
2346 for (src
= haystack
+ strlen (needle
); *src
;)
2347 *haystack
++ = *src
++;
2353 /* Compare two target format name strings.
2354 Return a value indicating how "similar" they are. */
2357 name_compare (char *first
, char *second
)
2363 copy1
= xmalloc (strlen (first
) + 1);
2364 copy2
= xmalloc (strlen (second
) + 1);
2366 /* Convert the names to lower case. */
2367 stricpy (copy1
, first
);
2368 stricpy (copy2
, second
);
2370 /* Remove size and endian strings from the name. */
2371 strcut (copy1
, "big");
2372 strcut (copy1
, "little");
2373 strcut (copy2
, "big");
2374 strcut (copy2
, "little");
2376 /* Return a value based on how many characters match,
2377 starting from the beginning. If both strings are
2378 the same then return 10 * their length. */
2379 for (result
= 0; copy1
[result
] == copy2
[result
]; result
++)
2380 if (copy1
[result
] == 0)
2392 /* Set by closest_target_match() below. */
2393 static const bfd_target
*winner
;
2395 /* Scan all the valid bfd targets looking for one that has the endianness
2396 requirement that was specified on the command line, and is the nearest
2397 match to the original output target. */
2400 closest_target_match (const bfd_target
*target
, void *data
)
2402 const bfd_target
*original
= data
;
2404 if (command_line
.endian
== ENDIAN_BIG
2405 && target
->byteorder
!= BFD_ENDIAN_BIG
)
2408 if (command_line
.endian
== ENDIAN_LITTLE
2409 && target
->byteorder
!= BFD_ENDIAN_LITTLE
)
2412 /* Must be the same flavour. */
2413 if (target
->flavour
!= original
->flavour
)
2416 /* If we have not found a potential winner yet, then record this one. */
2423 /* Oh dear, we now have two potential candidates for a successful match.
2424 Compare their names and choose the better one. */
2425 if (name_compare (target
->name
, original
->name
)
2426 > name_compare (winner
->name
, original
->name
))
2429 /* Keep on searching until wqe have checked them all. */
2433 /* Return the BFD target format of the first input file. */
2436 get_first_input_target (void)
2438 char *target
= NULL
;
2440 LANG_FOR_EACH_INPUT_STATEMENT (s
)
2442 if (s
->header
.type
== lang_input_statement_enum
2445 ldfile_open_file (s
);
2447 if (s
->the_bfd
!= NULL
2448 && bfd_check_format (s
->the_bfd
, bfd_object
))
2450 target
= bfd_get_target (s
->the_bfd
);
2462 lang_get_output_target (void)
2466 /* Has the user told us which output format to use? */
2467 if (output_target
!= NULL
)
2468 return output_target
;
2470 /* No - has the current target been set to something other than
2472 if (current_target
!= default_target
)
2473 return current_target
;
2475 /* No - can we determine the format of the first input file? */
2476 target
= get_first_input_target ();
2480 /* Failed - use the default output target. */
2481 return default_target
;
2484 /* Open the output file. */
2487 open_output (const char *name
)
2491 output_target
= lang_get_output_target ();
2493 /* Has the user requested a particular endianness on the command
2495 if (command_line
.endian
!= ENDIAN_UNSET
)
2497 const bfd_target
*target
;
2498 enum bfd_endian desired_endian
;
2500 /* Get the chosen target. */
2501 target
= bfd_search_for_target (get_target
, (void *) output_target
);
2503 /* If the target is not supported, we cannot do anything. */
2506 if (command_line
.endian
== ENDIAN_BIG
)
2507 desired_endian
= BFD_ENDIAN_BIG
;
2509 desired_endian
= BFD_ENDIAN_LITTLE
;
2511 /* See if the target has the wrong endianness. This should
2512 not happen if the linker script has provided big and
2513 little endian alternatives, but some scrips don't do
2515 if (target
->byteorder
!= desired_endian
)
2517 /* If it does, then see if the target provides
2518 an alternative with the correct endianness. */
2519 if (target
->alternative_target
!= NULL
2520 && (target
->alternative_target
->byteorder
== desired_endian
))
2521 output_target
= target
->alternative_target
->name
;
2524 /* Try to find a target as similar as possible to
2525 the default target, but which has the desired
2526 endian characteristic. */
2527 bfd_search_for_target (closest_target_match
,
2530 /* Oh dear - we could not find any targets that
2531 satisfy our requirements. */
2533 einfo (_("%P: warning: could not find any targets"
2534 " that match endianness requirement\n"));
2536 output_target
= winner
->name
;
2542 output
= bfd_openw (name
, output_target
);
2546 if (bfd_get_error () == bfd_error_invalid_target
)
2547 einfo (_("%P%F: target %s not found\n"), output_target
);
2549 einfo (_("%P%F: cannot open output file %s: %E\n"), name
);
2552 delete_output_file_on_failure
= TRUE
;
2554 if (! bfd_set_format (output
, bfd_object
))
2555 einfo (_("%P%F:%s: can not make object file: %E\n"), name
);
2556 if (! bfd_set_arch_mach (output
,
2557 ldfile_output_architecture
,
2558 ldfile_output_machine
))
2559 einfo (_("%P%F:%s: can not set architecture: %E\n"), name
);
2561 link_info
.hash
= bfd_link_hash_table_create (output
);
2562 if (link_info
.hash
== NULL
)
2563 einfo (_("%P%F: can not create link hash table: %E\n"));
2565 bfd_set_gp_size (output
, g_switch_value
);
2570 ldlang_open_output (lang_statement_union_type
*statement
)
2572 switch (statement
->header
.type
)
2574 case lang_output_statement_enum
:
2575 ASSERT (output_bfd
== NULL
);
2576 output_bfd
= open_output (statement
->output_statement
.name
);
2577 ldemul_set_output_arch ();
2578 if (config
.magic_demand_paged
&& !link_info
.relocatable
)
2579 output_bfd
->flags
|= D_PAGED
;
2581 output_bfd
->flags
&= ~D_PAGED
;
2582 if (config
.text_read_only
)
2583 output_bfd
->flags
|= WP_TEXT
;
2585 output_bfd
->flags
&= ~WP_TEXT
;
2586 if (link_info
.traditional_format
)
2587 output_bfd
->flags
|= BFD_TRADITIONAL_FORMAT
;
2589 output_bfd
->flags
&= ~BFD_TRADITIONAL_FORMAT
;
2592 case lang_target_statement_enum
:
2593 current_target
= statement
->target_statement
.target
;
2600 /* Convert between addresses in bytes and sizes in octets.
2601 For currently supported targets, octets_per_byte is always a power
2602 of two, so we can use shifts. */
2603 #define TO_ADDR(X) ((X) >> opb_shift)
2604 #define TO_SIZE(X) ((X) << opb_shift)
2606 /* Support the above. */
2607 static unsigned int opb_shift
= 0;
2612 unsigned x
= bfd_arch_mach_octets_per_byte (ldfile_output_architecture
,
2613 ldfile_output_machine
);
2616 while ((x
& 1) == 0)
2624 /* Open all the input files. */
2627 open_input_bfds (lang_statement_union_type
*s
, bfd_boolean force
)
2629 for (; s
!= NULL
; s
= s
->header
.next
)
2631 switch (s
->header
.type
)
2633 case lang_constructors_statement_enum
:
2634 open_input_bfds (constructor_list
.head
, force
);
2636 case lang_output_section_statement_enum
:
2637 open_input_bfds (s
->output_section_statement
.children
.head
, force
);
2639 case lang_wild_statement_enum
:
2640 /* Maybe we should load the file's symbols. */
2641 if (s
->wild_statement
.filename
2642 && ! wildcardp (s
->wild_statement
.filename
))
2643 lookup_name (s
->wild_statement
.filename
);
2644 open_input_bfds (s
->wild_statement
.children
.head
, force
);
2646 case lang_group_statement_enum
:
2648 struct bfd_link_hash_entry
*undefs
;
2650 /* We must continually search the entries in the group
2651 until no new symbols are added to the list of undefined
2656 undefs
= link_info
.hash
->undefs_tail
;
2657 open_input_bfds (s
->group_statement
.children
.head
, TRUE
);
2659 while (undefs
!= link_info
.hash
->undefs_tail
);
2662 case lang_target_statement_enum
:
2663 current_target
= s
->target_statement
.target
;
2665 case lang_input_statement_enum
:
2666 if (s
->input_statement
.real
)
2668 lang_statement_list_type add
;
2670 s
->input_statement
.target
= current_target
;
2672 /* If we are being called from within a group, and this
2673 is an archive which has already been searched, then
2674 force it to be researched unless the whole archive
2675 has been loaded already. */
2677 && !s
->input_statement
.whole_archive
2678 && s
->input_statement
.loaded
2679 && bfd_check_format (s
->input_statement
.the_bfd
,
2681 s
->input_statement
.loaded
= FALSE
;
2683 lang_list_init (&add
);
2685 if (! load_symbols (&s
->input_statement
, &add
))
2686 config
.make_executable
= FALSE
;
2688 if (add
.head
!= NULL
)
2690 *add
.tail
= s
->header
.next
;
2691 s
->header
.next
= add
.head
;
2701 /* Add a symbol to a hash of symbols used in DEFINED (NAME) expressions. */
2704 lang_track_definedness (const char *name
)
2706 if (bfd_hash_lookup (&lang_definedness_table
, name
, TRUE
, FALSE
) == NULL
)
2707 einfo (_("%P%F: bfd_hash_lookup failed creating symbol %s\n"), name
);
2710 /* New-function for the definedness hash table. */
2712 static struct bfd_hash_entry
*
2713 lang_definedness_newfunc (struct bfd_hash_entry
*entry
,
2714 struct bfd_hash_table
*table ATTRIBUTE_UNUSED
,
2715 const char *name ATTRIBUTE_UNUSED
)
2717 struct lang_definedness_hash_entry
*ret
2718 = (struct lang_definedness_hash_entry
*) entry
;
2721 ret
= (struct lang_definedness_hash_entry
*)
2722 bfd_hash_allocate (table
, sizeof (struct lang_definedness_hash_entry
));
2725 einfo (_("%P%F: bfd_hash_allocate failed creating symbol %s\n"), name
);
2727 ret
->iteration
= -1;
2731 /* Return the iteration when the definition of NAME was last updated. A
2732 value of -1 means that the symbol is not defined in the linker script
2733 or the command line, but may be defined in the linker symbol table. */
2736 lang_symbol_definition_iteration (const char *name
)
2738 struct lang_definedness_hash_entry
*defentry
2739 = (struct lang_definedness_hash_entry
*)
2740 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2742 /* We've already created this one on the presence of DEFINED in the
2743 script, so it can't be NULL unless something is borked elsewhere in
2745 if (defentry
== NULL
)
2748 return defentry
->iteration
;
2751 /* Update the definedness state of NAME. */
2754 lang_update_definedness (const char *name
, struct bfd_link_hash_entry
*h
)
2756 struct lang_definedness_hash_entry
*defentry
2757 = (struct lang_definedness_hash_entry
*)
2758 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2760 /* We don't keep track of symbols not tested with DEFINED. */
2761 if (defentry
== NULL
)
2764 /* If the symbol was already defined, and not from an earlier statement
2765 iteration, don't update the definedness iteration, because that'd
2766 make the symbol seem defined in the linker script at this point, and
2767 it wasn't; it was defined in some object. If we do anyway, DEFINED
2768 would start to yield false before this point and the construct "sym =
2769 DEFINED (sym) ? sym : X;" would change sym to X despite being defined
2771 if (h
->type
!= bfd_link_hash_undefined
2772 && h
->type
!= bfd_link_hash_common
2773 && h
->type
!= bfd_link_hash_new
2774 && defentry
->iteration
== -1)
2777 defentry
->iteration
= lang_statement_iteration
;
2780 /* Add the supplied name to the symbol table as an undefined reference.
2781 This is a two step process as the symbol table doesn't even exist at
2782 the time the ld command line is processed. First we put the name
2783 on a list, then, once the output file has been opened, transfer the
2784 name to the symbol table. */
2786 typedef struct bfd_sym_chain ldlang_undef_chain_list_type
;
2788 #define ldlang_undef_chain_list_head entry_symbol.next
2791 ldlang_add_undef (const char *const name
)
2793 ldlang_undef_chain_list_type
*new =
2794 stat_alloc (sizeof (ldlang_undef_chain_list_type
));
2796 new->next
= ldlang_undef_chain_list_head
;
2797 ldlang_undef_chain_list_head
= new;
2799 new->name
= xstrdup (name
);
2801 if (output_bfd
!= NULL
)
2802 insert_undefined (new->name
);
2805 /* Insert NAME as undefined in the symbol table. */
2808 insert_undefined (const char *name
)
2810 struct bfd_link_hash_entry
*h
;
2812 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, FALSE
, TRUE
);
2814 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2815 if (h
->type
== bfd_link_hash_new
)
2817 h
->type
= bfd_link_hash_undefined
;
2818 h
->u
.undef
.abfd
= NULL
;
2819 bfd_link_add_undef (link_info
.hash
, h
);
2823 /* Run through the list of undefineds created above and place them
2824 into the linker hash table as undefined symbols belonging to the
2828 lang_place_undefineds (void)
2830 ldlang_undef_chain_list_type
*ptr
;
2832 for (ptr
= ldlang_undef_chain_list_head
; ptr
!= NULL
; ptr
= ptr
->next
)
2833 insert_undefined (ptr
->name
);
2836 /* Check for all readonly or some readwrite sections. */
2839 check_input_sections
2840 (lang_statement_union_type
*s
,
2841 lang_output_section_statement_type
*output_section_statement
)
2843 for (; s
!= (lang_statement_union_type
*) NULL
; s
= s
->header
.next
)
2845 switch (s
->header
.type
)
2847 case lang_wild_statement_enum
:
2848 walk_wild (&s
->wild_statement
, check_section_callback
,
2849 output_section_statement
);
2850 if (! output_section_statement
->all_input_readonly
)
2853 case lang_constructors_statement_enum
:
2854 check_input_sections (constructor_list
.head
,
2855 output_section_statement
);
2856 if (! output_section_statement
->all_input_readonly
)
2859 case lang_group_statement_enum
:
2860 check_input_sections (s
->group_statement
.children
.head
,
2861 output_section_statement
);
2862 if (! output_section_statement
->all_input_readonly
)
2871 /* Update wildcard statements if needed. */
2874 update_wild_statements (lang_statement_union_type
*s
)
2876 struct wildcard_list
*sec
;
2878 switch (sort_section
)
2888 for (; s
!= NULL
; s
= s
->header
.next
)
2890 switch (s
->header
.type
)
2895 case lang_wild_statement_enum
:
2896 sec
= s
->wild_statement
.section_list
;
2899 switch (sec
->spec
.sorted
)
2902 sec
->spec
.sorted
= sort_section
;
2905 if (sort_section
== by_alignment
)
2906 sec
->spec
.sorted
= by_name_alignment
;
2909 if (sort_section
== by_name
)
2910 sec
->spec
.sorted
= by_alignment_name
;
2918 case lang_constructors_statement_enum
:
2919 update_wild_statements (constructor_list
.head
);
2922 case lang_output_section_statement_enum
:
2923 update_wild_statements
2924 (s
->output_section_statement
.children
.head
);
2927 case lang_group_statement_enum
:
2928 update_wild_statements (s
->group_statement
.children
.head
);
2936 /* Open input files and attach to output sections. */
2939 map_input_to_output_sections
2940 (lang_statement_union_type
*s
, const char *target
,
2941 lang_output_section_statement_type
*os
)
2943 for (; s
!= NULL
; s
= s
->header
.next
)
2945 switch (s
->header
.type
)
2947 case lang_wild_statement_enum
:
2948 wild (&s
->wild_statement
, target
, os
);
2950 case lang_constructors_statement_enum
:
2951 map_input_to_output_sections (constructor_list
.head
,
2955 case lang_output_section_statement_enum
:
2956 if (s
->output_section_statement
.constraint
)
2958 if (s
->output_section_statement
.constraint
!= ONLY_IF_RW
2959 && s
->output_section_statement
.constraint
!= ONLY_IF_RO
)
2961 s
->output_section_statement
.all_input_readonly
= TRUE
;
2962 check_input_sections (s
->output_section_statement
.children
.head
,
2963 &s
->output_section_statement
);
2964 if ((s
->output_section_statement
.all_input_readonly
2965 && s
->output_section_statement
.constraint
== ONLY_IF_RW
)
2966 || (!s
->output_section_statement
.all_input_readonly
2967 && s
->output_section_statement
.constraint
== ONLY_IF_RO
))
2969 s
->output_section_statement
.constraint
= -1;
2974 map_input_to_output_sections (s
->output_section_statement
.children
.head
,
2976 &s
->output_section_statement
);
2978 case lang_output_statement_enum
:
2980 case lang_target_statement_enum
:
2981 target
= s
->target_statement
.target
;
2983 case lang_group_statement_enum
:
2984 map_input_to_output_sections (s
->group_statement
.children
.head
,
2988 case lang_data_statement_enum
:
2989 /* Make sure that any sections mentioned in the expression
2991 exp_init_os (s
->data_statement
.exp
);
2992 if (os
!= NULL
&& os
->bfd_section
== NULL
)
2994 /* The output section gets contents, and then we inspect for
2995 any flags set in the input script which override any ALLOC. */
2996 os
->bfd_section
->flags
|= SEC_HAS_CONTENTS
;
2997 if (!(os
->flags
& SEC_NEVER_LOAD
))
2998 os
->bfd_section
->flags
|= SEC_ALLOC
| SEC_LOAD
;
3000 case lang_fill_statement_enum
:
3001 case lang_input_section_enum
:
3002 case lang_object_symbols_statement_enum
:
3003 case lang_reloc_statement_enum
:
3004 case lang_padding_statement_enum
:
3005 case lang_input_statement_enum
:
3006 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3009 case lang_assignment_statement_enum
:
3010 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3013 /* Make sure that any sections mentioned in the assignment
3015 exp_init_os (s
->assignment_statement
.exp
);
3017 case lang_afile_asection_pair_statement_enum
:
3020 case lang_address_statement_enum
:
3021 /* Mark the specified section with the supplied address.
3023 If this section was actually a segment marker, then the
3024 directive is ignored if the linker script explicitly
3025 processed the segment marker. Originally, the linker
3026 treated segment directives (like -Ttext on the
3027 command-line) as section directives. We honor the
3028 section directive semantics for backwards compatibilty;
3029 linker scripts that do not specifically check for
3030 SEGMENT_START automatically get the old semantics. */
3031 if (!s
->address_statement
.segment
3032 || !s
->address_statement
.segment
->used
)
3034 lang_output_section_statement_type
*aos
3035 = (lang_output_section_statement_lookup
3036 (s
->address_statement
.section_name
));
3038 if (aos
->bfd_section
== NULL
)
3040 aos
->addr_tree
= s
->address_statement
.address
;
3047 /* Worker function for lang_mark_used_section. Recursiveness goes
3051 lang_mark_used_section_1
3052 (lang_statement_union_type
*s
,
3053 lang_output_section_statement_type
*output_section_statement
)
3055 for (; s
!= NULL
; s
= s
->header
.next
)
3057 switch (s
->header
.type
)
3059 case lang_constructors_statement_enum
:
3062 case lang_output_section_statement_enum
:
3064 lang_output_section_statement_type
*os
;
3066 os
= &(s
->output_section_statement
);
3067 if (os
->bfd_section
!= NULL
)
3068 lang_mark_used_section_1 (os
->children
.head
, os
);
3071 case lang_wild_statement_enum
:
3072 lang_mark_used_section_1 (s
->wild_statement
.children
.head
,
3073 output_section_statement
);
3077 case lang_object_symbols_statement_enum
:
3078 case lang_output_statement_enum
:
3079 case lang_target_statement_enum
:
3081 case lang_data_statement_enum
:
3082 exp_mark_used_section (s
->data_statement
.exp
,
3083 bfd_abs_section_ptr
);
3086 case lang_reloc_statement_enum
:
3089 case lang_input_section_enum
:
3092 case lang_input_statement_enum
:
3094 case lang_fill_statement_enum
:
3096 case lang_assignment_statement_enum
:
3097 exp_mark_used_section (s
->assignment_statement
.exp
,
3098 output_section_statement
->bfd_section
);
3100 case lang_padding_statement_enum
:
3103 case lang_group_statement_enum
:
3104 lang_mark_used_section_1 (s
->group_statement
.children
.head
,
3105 output_section_statement
);
3111 case lang_address_statement_enum
:
3118 lang_mark_used_section (void)
3120 unsigned int gc_sections
= link_info
.gc_sections
;
3122 /* Callers of exp_fold_tree need to increment this. */
3123 lang_statement_iteration
++;
3124 lang_mark_used_section_1 (statement_list
.head
, abs_output_section
);
3126 link_info
.gc_sections
= 0;
3127 bfd_gc_sections (output_bfd
, &link_info
);
3128 link_info
.gc_sections
= gc_sections
;
3131 /* An output section might have been removed after its statement was
3132 added. For example, ldemul_before_allocation can remove dynamic
3133 sections if they turn out to be not needed. Clean them up here. */
3136 strip_excluded_output_sections (void)
3138 lang_output_section_statement_type
*os
;
3140 lang_mark_used_section ();
3142 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
3146 asection
*output_section
;
3147 bfd_boolean exclude
;
3149 if (os
->constraint
== -1)
3152 output_section
= os
->bfd_section
;
3153 if (output_section
== NULL
)
3157 if (output_section
->map_head
.s
!= NULL
)
3161 for (s
= output_section
->map_head
.s
; s
!= NULL
;
3163 if ((s
->flags
& SEC_EXCLUDE
) == 0)
3166 output_section
->map_head
.link_order
= NULL
;
3167 output_section
->map_tail
.link_order
= NULL
;
3174 || (output_section
->linker_has_input
== 0
3175 && ((output_section
->flags
3176 & (SEC_KEEP
| SEC_HAS_CONTENTS
)) == 0)))
3179 os
->bfd_section
= NULL
;
3181 /* We don't set bfd_section to NULL since bfd_section of the
3182 * removed output section statement may still be used. */
3184 if (!bfd_section_removed_from_list (output_bfd
,
3187 bfd_section_list_remove (output_bfd
, output_section
);
3188 output_bfd
->section_count
--;
3193 /* Stop future calls to lang_add_section from messing with map_head
3194 and map_tail link_order fields. */
3195 stripped_excluded_sections
= TRUE
;
3199 print_output_section_statement
3200 (lang_output_section_statement_type
*output_section_statement
)
3202 asection
*section
= output_section_statement
->bfd_section
;
3205 if (output_section_statement
!= abs_output_section
)
3207 minfo ("\n%s", output_section_statement
->name
);
3209 if (section
!= NULL
)
3211 print_dot
= section
->vma
;
3213 len
= strlen (output_section_statement
->name
);
3214 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
3219 while (len
< SECTION_NAME_MAP_LENGTH
)
3225 minfo ("0x%V %W", section
->vma
, section
->size
);
3227 if (output_section_statement
->load_base
!= NULL
)
3231 addr
= exp_get_abs_int (output_section_statement
->load_base
, 0,
3232 "load base", lang_final_phase_enum
);
3233 minfo (_(" load address 0x%V"), addr
);
3240 print_statement_list (output_section_statement
->children
.head
,
3241 output_section_statement
);
3244 /* Scan for the use of the destination in the right hand side
3245 of an expression. In such cases we will not compute the
3246 correct expression, since the value of DST that is used on
3247 the right hand side will be its final value, not its value
3248 just before this expression is evaluated. */
3251 scan_for_self_assignment (const char * dst
, etree_type
* rhs
)
3253 if (rhs
== NULL
|| dst
== NULL
)
3256 switch (rhs
->type
.node_class
)
3259 return scan_for_self_assignment (dst
, rhs
->binary
.lhs
)
3260 || scan_for_self_assignment (dst
, rhs
->binary
.rhs
);
3263 return scan_for_self_assignment (dst
, rhs
->trinary
.lhs
)
3264 || scan_for_self_assignment (dst
, rhs
->trinary
.rhs
);
3267 case etree_provided
:
3269 if (strcmp (dst
, rhs
->assign
.dst
) == 0)
3271 return scan_for_self_assignment (dst
, rhs
->assign
.src
);
3274 return scan_for_self_assignment (dst
, rhs
->unary
.child
);
3278 return strcmp (dst
, rhs
->value
.str
) == 0;
3283 return strcmp (dst
, rhs
->name
.name
) == 0;
3295 print_assignment (lang_assignment_statement_type
*assignment
,
3296 lang_output_section_statement_type
*output_section
)
3300 bfd_boolean computation_is_valid
= TRUE
;
3302 etree_value_type result
;
3304 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3307 if (assignment
->exp
->type
.node_class
== etree_assert
)
3310 tree
= assignment
->exp
->assert_s
.child
;
3311 computation_is_valid
= TRUE
;
3315 const char *dst
= assignment
->exp
->assign
.dst
;
3317 is_dot
= (dst
[0] == '.' && dst
[1] == 0);
3318 tree
= assignment
->exp
->assign
.src
;
3319 computation_is_valid
= is_dot
|| (scan_for_self_assignment (dst
, tree
) == FALSE
);
3322 result
= exp_fold_tree (tree
, output_section
->bfd_section
,
3323 lang_final_phase_enum
, print_dot
, &print_dot
);
3328 if (computation_is_valid
)
3330 value
= result
.value
;
3333 value
+= result
.section
->vma
;
3335 minfo ("0x%V", value
);
3341 struct bfd_link_hash_entry
*h
;
3343 h
= bfd_link_hash_lookup (link_info
.hash
, assignment
->exp
->assign
.dst
,
3344 FALSE
, FALSE
, TRUE
);
3347 value
= h
->u
.def
.value
;
3350 value
+= result
.section
->vma
;
3352 minfo ("[0x%V]", value
);
3355 minfo ("[unresolved]");
3367 exp_print_tree (assignment
->exp
);
3372 print_input_statement (lang_input_statement_type
*statm
)
3374 if (statm
->filename
!= NULL
)
3376 fprintf (config
.map_file
, "LOAD %s\n", statm
->filename
);
3380 /* Print all symbols defined in a particular section. This is called
3381 via bfd_link_hash_traverse, or by print_all_symbols. */
3384 print_one_symbol (struct bfd_link_hash_entry
*hash_entry
, void *ptr
)
3386 asection
*sec
= ptr
;
3388 if ((hash_entry
->type
== bfd_link_hash_defined
3389 || hash_entry
->type
== bfd_link_hash_defweak
)
3390 && sec
== hash_entry
->u
.def
.section
)
3394 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3397 (hash_entry
->u
.def
.value
3398 + hash_entry
->u
.def
.section
->output_offset
3399 + hash_entry
->u
.def
.section
->output_section
->vma
));
3401 minfo (" %T\n", hash_entry
->root
.string
);
3408 print_all_symbols (sec
)
3411 struct fat_user_section_struct
*ud
= get_userdata (sec
);
3412 struct map_symbol_def
*def
;
3417 *ud
->map_symbol_def_tail
= 0;
3418 for (def
= ud
->map_symbol_def_head
; def
; def
= def
->next
)
3419 print_one_symbol (def
->entry
, sec
);
3422 /* Print information about an input section to the map file. */
3425 print_input_section (lang_input_section_type
*in
)
3427 asection
*i
= in
->section
;
3428 bfd_size_type size
= i
->size
;
3437 minfo ("%s", i
->name
);
3439 len
= 1 + strlen (i
->name
);
3440 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
3445 while (len
< SECTION_NAME_MAP_LENGTH
)
3451 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3452 addr
= i
->output_section
->vma
+ i
->output_offset
;
3459 minfo ("0x%V %W %B\n", addr
, TO_ADDR (size
), i
->owner
);
3461 if (size
!= i
->rawsize
&& i
->rawsize
!= 0)
3463 len
= SECTION_NAME_MAP_LENGTH
+ 3;
3475 minfo (_("%W (size before relaxing)\n"), i
->rawsize
);
3478 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3480 if (command_line
.reduce_memory_overheads
)
3481 bfd_link_hash_traverse (link_info
.hash
, print_one_symbol
, i
);
3483 print_all_symbols (i
);
3485 print_dot
= addr
+ TO_ADDR (size
);
3491 print_fill_statement (lang_fill_statement_type
*fill
)
3495 fputs (" FILL mask 0x", config
.map_file
);
3496 for (p
= fill
->fill
->data
, size
= fill
->fill
->size
; size
!= 0; p
++, size
--)
3497 fprintf (config
.map_file
, "%02x", *p
);
3498 fputs ("\n", config
.map_file
);
3502 print_data_statement (lang_data_statement_type
*data
)
3510 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3513 addr
= data
->output_vma
;
3514 if (data
->output_section
!= NULL
)
3515 addr
+= data
->output_section
->vma
;
3543 minfo ("0x%V %W %s 0x%v", addr
, size
, name
, data
->value
);
3545 if (data
->exp
->type
.node_class
!= etree_value
)
3548 exp_print_tree (data
->exp
);
3553 print_dot
= addr
+ TO_ADDR (size
);
3556 /* Print an address statement. These are generated by options like
3560 print_address_statement (lang_address_statement_type
*address
)
3562 minfo (_("Address of section %s set to "), address
->section_name
);
3563 exp_print_tree (address
->address
);
3567 /* Print a reloc statement. */
3570 print_reloc_statement (lang_reloc_statement_type
*reloc
)
3577 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3580 addr
= reloc
->output_vma
;
3581 if (reloc
->output_section
!= NULL
)
3582 addr
+= reloc
->output_section
->vma
;
3584 size
= bfd_get_reloc_size (reloc
->howto
);
3586 minfo ("0x%V %W RELOC %s ", addr
, size
, reloc
->howto
->name
);
3588 if (reloc
->name
!= NULL
)
3589 minfo ("%s+", reloc
->name
);
3591 minfo ("%s+", reloc
->section
->name
);
3593 exp_print_tree (reloc
->addend_exp
);
3597 print_dot
= addr
+ TO_ADDR (size
);
3601 print_padding_statement (lang_padding_statement_type
*s
)
3609 len
= sizeof " *fill*" - 1;
3610 while (len
< SECTION_NAME_MAP_LENGTH
)
3616 addr
= s
->output_offset
;
3617 if (s
->output_section
!= NULL
)
3618 addr
+= s
->output_section
->vma
;
3619 minfo ("0x%V %W ", addr
, (bfd_vma
) s
->size
);
3621 if (s
->fill
->size
!= 0)
3625 for (p
= s
->fill
->data
, size
= s
->fill
->size
; size
!= 0; p
++, size
--)
3626 fprintf (config
.map_file
, "%02x", *p
);
3631 print_dot
= addr
+ TO_ADDR (s
->size
);
3635 print_wild_statement (lang_wild_statement_type
*w
,
3636 lang_output_section_statement_type
*os
)
3638 struct wildcard_list
*sec
;
3642 if (w
->filenames_sorted
)
3644 if (w
->filename
!= NULL
)
3645 minfo ("%s", w
->filename
);
3648 if (w
->filenames_sorted
)
3652 for (sec
= w
->section_list
; sec
; sec
= sec
->next
)
3654 if (sec
->spec
.sorted
)
3656 if (sec
->spec
.exclude_name_list
!= NULL
)
3659 minfo ("EXCLUDE_FILE(%s", sec
->spec
.exclude_name_list
->name
);
3660 for (tmp
= sec
->spec
.exclude_name_list
->next
; tmp
; tmp
= tmp
->next
)
3661 minfo (" %s", tmp
->name
);
3664 if (sec
->spec
.name
!= NULL
)
3665 minfo ("%s", sec
->spec
.name
);
3668 if (sec
->spec
.sorted
)
3677 print_statement_list (w
->children
.head
, os
);
3680 /* Print a group statement. */
3683 print_group (lang_group_statement_type
*s
,
3684 lang_output_section_statement_type
*os
)
3686 fprintf (config
.map_file
, "START GROUP\n");
3687 print_statement_list (s
->children
.head
, os
);
3688 fprintf (config
.map_file
, "END GROUP\n");
3691 /* Print the list of statements in S.
3692 This can be called for any statement type. */
3695 print_statement_list (lang_statement_union_type
*s
,
3696 lang_output_section_statement_type
*os
)
3700 print_statement (s
, os
);
3705 /* Print the first statement in statement list S.
3706 This can be called for any statement type. */
3709 print_statement (lang_statement_union_type
*s
,
3710 lang_output_section_statement_type
*os
)
3712 switch (s
->header
.type
)
3715 fprintf (config
.map_file
, _("Fail with %d\n"), s
->header
.type
);
3718 case lang_constructors_statement_enum
:
3719 if (constructor_list
.head
!= NULL
)
3721 if (constructors_sorted
)
3722 minfo (" SORT (CONSTRUCTORS)\n");
3724 minfo (" CONSTRUCTORS\n");
3725 print_statement_list (constructor_list
.head
, os
);
3728 case lang_wild_statement_enum
:
3729 print_wild_statement (&s
->wild_statement
, os
);
3731 case lang_address_statement_enum
:
3732 print_address_statement (&s
->address_statement
);
3734 case lang_object_symbols_statement_enum
:
3735 minfo (" CREATE_OBJECT_SYMBOLS\n");
3737 case lang_fill_statement_enum
:
3738 print_fill_statement (&s
->fill_statement
);
3740 case lang_data_statement_enum
:
3741 print_data_statement (&s
->data_statement
);
3743 case lang_reloc_statement_enum
:
3744 print_reloc_statement (&s
->reloc_statement
);
3746 case lang_input_section_enum
:
3747 print_input_section (&s
->input_section
);
3749 case lang_padding_statement_enum
:
3750 print_padding_statement (&s
->padding_statement
);
3752 case lang_output_section_statement_enum
:
3753 print_output_section_statement (&s
->output_section_statement
);
3755 case lang_assignment_statement_enum
:
3756 print_assignment (&s
->assignment_statement
, os
);
3758 case lang_target_statement_enum
:
3759 fprintf (config
.map_file
, "TARGET(%s)\n", s
->target_statement
.target
);
3761 case lang_output_statement_enum
:
3762 minfo ("OUTPUT(%s", s
->output_statement
.name
);
3763 if (output_target
!= NULL
)
3764 minfo (" %s", output_target
);
3767 case lang_input_statement_enum
:
3768 print_input_statement (&s
->input_statement
);
3770 case lang_group_statement_enum
:
3771 print_group (&s
->group_statement
, os
);
3773 case lang_afile_asection_pair_statement_enum
:
3780 print_statements (void)
3782 print_statement_list (statement_list
.head
, abs_output_section
);
3785 /* Print the first N statements in statement list S to STDERR.
3786 If N == 0, nothing is printed.
3787 If N < 0, the entire list is printed.
3788 Intended to be called from GDB. */
3791 dprint_statement (lang_statement_union_type
*s
, int n
)
3793 FILE *map_save
= config
.map_file
;
3795 config
.map_file
= stderr
;
3798 print_statement_list (s
, abs_output_section
);
3801 while (s
&& --n
>= 0)
3803 print_statement (s
, abs_output_section
);
3808 config
.map_file
= map_save
;
3812 insert_pad (lang_statement_union_type
**ptr
,
3814 unsigned int alignment_needed
,
3815 asection
*output_section
,
3818 static fill_type zero_fill
= { 1, { 0 } };
3819 lang_statement_union_type
*pad
;
3821 pad
= ((lang_statement_union_type
*)
3822 ((char *) ptr
- offsetof (lang_statement_union_type
, header
.next
)));
3823 if (ptr
!= &statement_list
.head
3824 && pad
->header
.type
== lang_padding_statement_enum
3825 && pad
->padding_statement
.output_section
== output_section
)
3827 /* Use the existing pad statement. The above test on output
3828 section is probably redundant, but it doesn't hurt to check. */
3832 /* Make a new padding statement, linked into existing chain. */
3833 pad
= stat_alloc (sizeof (lang_padding_statement_type
));
3834 pad
->header
.next
= *ptr
;
3836 pad
->header
.type
= lang_padding_statement_enum
;
3837 pad
->padding_statement
.output_section
= output_section
;
3840 pad
->padding_statement
.fill
= fill
;
3842 pad
->padding_statement
.output_offset
= dot
- output_section
->vma
;
3843 pad
->padding_statement
.size
= alignment_needed
;
3844 output_section
->size
+= alignment_needed
;
3847 /* Work out how much this section will move the dot point. */
3851 (lang_statement_union_type
**this_ptr
,
3852 lang_output_section_statement_type
*output_section_statement
,
3856 lang_input_section_type
*is
= &((*this_ptr
)->input_section
);
3857 asection
*i
= is
->section
;
3859 if (!is
->ifile
->just_syms_flag
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3861 unsigned int alignment_needed
;
3864 /* Align this section first to the input sections requirement,
3865 then to the output section's requirement. If this alignment
3866 is greater than any seen before, then record it too. Perform
3867 the alignment by inserting a magic 'padding' statement. */
3869 if (output_section_statement
->subsection_alignment
!= -1)
3870 i
->alignment_power
= output_section_statement
->subsection_alignment
;
3872 o
= output_section_statement
->bfd_section
;
3873 if (o
->alignment_power
< i
->alignment_power
)
3874 o
->alignment_power
= i
->alignment_power
;
3876 alignment_needed
= align_power (dot
, i
->alignment_power
) - dot
;
3878 if (alignment_needed
!= 0)
3880 insert_pad (this_ptr
, fill
, TO_SIZE (alignment_needed
), o
, dot
);
3881 dot
+= alignment_needed
;
3884 /* Remember where in the output section this input section goes. */
3886 i
->output_offset
= dot
- o
->vma
;
3888 /* Mark how big the output section must be to contain this now. */
3889 dot
+= TO_ADDR (i
->size
);
3890 o
->size
= TO_SIZE (dot
- o
->vma
);
3894 i
->output_offset
= i
->vma
- output_section_statement
->bfd_section
->vma
;
3901 sort_sections_by_lma (const void *arg1
, const void *arg2
)
3903 const asection
*sec1
= *(const asection
**) arg1
;
3904 const asection
*sec2
= *(const asection
**) arg2
;
3906 if (bfd_section_lma (sec1
->owner
, sec1
)
3907 < bfd_section_lma (sec2
->owner
, sec2
))
3909 else if (bfd_section_lma (sec1
->owner
, sec1
)
3910 > bfd_section_lma (sec2
->owner
, sec2
))
3916 #define IGNORE_SECTION(s) \
3917 ((s->flags & SEC_NEVER_LOAD) != 0 \
3918 || (s->flags & SEC_ALLOC) == 0 \
3919 || ((s->flags & SEC_THREAD_LOCAL) != 0 \
3920 && (s->flags & SEC_LOAD) == 0))
3922 /* Check to see if any allocated sections overlap with other allocated
3923 sections. This can happen if a linker script specifies the output
3924 section addresses of the two sections. */
3927 lang_check_section_addresses (void)
3930 asection
**sections
, **spp
;
3938 if (bfd_count_sections (output_bfd
) <= 1)
3941 amt
= bfd_count_sections (output_bfd
) * sizeof (asection
*);
3942 sections
= xmalloc (amt
);
3944 /* Scan all sections in the output list. */
3946 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
3948 /* Only consider loadable sections with real contents. */
3949 if (IGNORE_SECTION (s
) || s
->size
== 0)
3952 sections
[count
] = s
;
3959 qsort (sections
, (size_t) count
, sizeof (asection
*),
3960 sort_sections_by_lma
);
3964 s_start
= bfd_section_lma (output_bfd
, s
);
3965 s_end
= s_start
+ TO_ADDR (s
->size
) - 1;
3966 for (count
--; count
; count
--)
3968 /* We must check the sections' LMA addresses not their VMA
3969 addresses because overlay sections can have overlapping VMAs
3970 but they must have distinct LMAs. */
3975 s_start
= bfd_section_lma (output_bfd
, s
);
3976 s_end
= s_start
+ TO_ADDR (s
->size
) - 1;
3978 /* Look for an overlap. */
3979 if (s_end
>= os_start
&& s_start
<= os_end
)
3980 einfo (_("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
3981 s
->name
, s_start
, s_end
, os
->name
, os_start
, os_end
);
3987 /* Make sure the new address is within the region. We explicitly permit the
3988 current address to be at the exact end of the region when the address is
3989 non-zero, in case the region is at the end of addressable memory and the
3990 calculation wraps around. */
3993 os_region_check (lang_output_section_statement_type
*os
,
3994 lang_memory_region_type
*region
,
3998 if ((region
->current
< region
->origin
3999 || (region
->current
- region
->origin
> region
->length
))
4000 && ((region
->current
!= region
->origin
+ region
->length
)
4005 einfo (_("%X%P: address 0x%v of %B section %s"
4006 " is not within region %s\n"),
4008 os
->bfd_section
->owner
,
4009 os
->bfd_section
->name
,
4014 einfo (_("%X%P: region %s is full (%B section %s)\n"),
4016 os
->bfd_section
->owner
,
4017 os
->bfd_section
->name
);
4019 /* Reset the region pointer. */
4020 region
->current
= region
->origin
;
4024 /* Set the sizes for all the output sections. */
4027 lang_size_sections_1
4028 (lang_statement_union_type
*s
,
4029 lang_output_section_statement_type
*output_section_statement
,
4030 lang_statement_union_type
**prev
,
4034 bfd_boolean check_regions
)
4036 /* Size up the sections from their constituent parts. */
4037 for (; s
!= NULL
; s
= s
->header
.next
)
4039 switch (s
->header
.type
)
4041 case lang_output_section_statement_enum
:
4044 lang_output_section_statement_type
*os
;
4046 os
= &s
->output_section_statement
;
4047 if (os
->bfd_section
== NULL
|| os
->ignored
)
4048 /* This section was removed or never actually created. */
4051 /* If this is a COFF shared library section, use the size and
4052 address from the input section. FIXME: This is COFF
4053 specific; it would be cleaner if there were some other way
4054 to do this, but nothing simple comes to mind. */
4055 if ((bfd_get_flavour (output_bfd
) == bfd_target_ecoff_flavour
4056 || bfd_get_flavour (output_bfd
) == bfd_target_coff_flavour
)
4057 && (os
->bfd_section
->flags
& SEC_COFF_SHARED_LIBRARY
) != 0)
4061 if (os
->children
.head
== NULL
4062 || os
->children
.head
->header
.next
!= NULL
4063 || (os
->children
.head
->header
.type
4064 != lang_input_section_enum
))
4065 einfo (_("%P%X: Internal error on COFF shared library"
4066 " section %s\n"), os
->name
);
4068 input
= os
->children
.head
->input_section
.section
;
4069 bfd_set_section_vma (os
->bfd_section
->owner
,
4071 bfd_section_vma (input
->owner
, input
));
4072 os
->bfd_section
->size
= input
->size
;
4076 if (bfd_is_abs_section (os
->bfd_section
))
4078 /* No matter what happens, an abs section starts at zero. */
4079 ASSERT (os
->bfd_section
->vma
== 0);
4083 if (os
->addr_tree
== NULL
)
4085 /* No address specified for this section, get one
4086 from the region specification. */
4087 if (os
->region
== NULL
4088 || ((os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))
4089 && os
->region
->name
[0] == '*'
4090 && strcmp (os
->region
->name
,
4091 DEFAULT_MEMORY_REGION
) == 0))
4093 os
->region
= lang_memory_default (os
->bfd_section
);
4096 /* If a loadable section is using the default memory
4097 region, and some non default memory regions were
4098 defined, issue an error message. */
4099 if (!IGNORE_SECTION (os
->bfd_section
)
4100 && ! link_info
.relocatable
4102 && strcmp (os
->region
->name
,
4103 DEFAULT_MEMORY_REGION
) == 0
4104 && lang_memory_region_list
!= NULL
4105 && (strcmp (lang_memory_region_list
->name
,
4106 DEFAULT_MEMORY_REGION
) != 0
4107 || lang_memory_region_list
->next
!= NULL
))
4109 /* By default this is an error rather than just a
4110 warning because if we allocate the section to the
4111 default memory region we can end up creating an
4112 excessively large binary, or even seg faulting when
4113 attempting to perform a negative seek. See
4114 sources.redhat.com/ml/binutils/2003-04/msg00423.html
4115 for an example of this. This behaviour can be
4116 overridden by the using the --no-check-sections
4118 if (command_line
.check_section_addresses
)
4119 einfo (_("%P%F: error: no memory region specified"
4120 " for loadable section `%s'\n"),
4121 bfd_get_section_name (output_bfd
,
4124 einfo (_("%P: warning: no memory region specified"
4125 " for loadable section `%s'\n"),
4126 bfd_get_section_name (output_bfd
,
4130 dot
= os
->region
->current
;
4132 if (os
->section_alignment
== -1)
4137 dot
= align_power (dot
,
4138 os
->bfd_section
->alignment_power
);
4140 if (dot
!= olddot
&& config
.warn_section_align
)
4141 einfo (_("%P: warning: changing start of section"
4142 " %s by %u bytes\n"),
4143 os
->name
, (unsigned int) (dot
- olddot
));
4151 r
= exp_fold_tree (os
->addr_tree
,
4152 bfd_abs_section_ptr
,
4153 lang_allocating_phase_enum
,
4158 einfo (_("%F%S: non constant or forward reference"
4159 " address expression for section %s\n"),
4162 dot
= r
.value
+ r
.section
->vma
;
4165 /* The section starts here.
4166 First, align to what the section needs. */
4168 if (os
->section_alignment
!= -1)
4169 dot
= align_power (dot
, os
->section_alignment
);
4171 bfd_set_section_vma (0, os
->bfd_section
, dot
);
4173 os
->bfd_section
->output_offset
= 0;
4176 lang_size_sections_1 (os
->children
.head
, os
, &os
->children
.head
,
4177 os
->fill
, dot
, relax
, check_regions
);
4179 /* Put the section within the requested block size, or
4180 align at the block boundary. */
4181 after
= ((os
->bfd_section
->vma
4182 + TO_ADDR (os
->bfd_section
->size
)
4183 + os
->block_value
- 1)
4184 & - (bfd_vma
) os
->block_value
);
4186 if (bfd_is_abs_section (os
->bfd_section
))
4187 ASSERT (after
== os
->bfd_section
->vma
);
4189 os
->bfd_section
->size
4190 = TO_SIZE (after
- os
->bfd_section
->vma
);
4192 dot
= os
->bfd_section
->vma
;
4193 /* .tbss sections effectively have zero size. */
4194 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
4195 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
4196 || link_info
.relocatable
)
4197 dot
+= TO_ADDR (os
->bfd_section
->size
);
4201 if (os
->update_dot_tree
!= 0)
4202 exp_fold_tree (os
->update_dot_tree
, bfd_abs_section_ptr
,
4203 lang_allocating_phase_enum
, dot
, &dot
);
4205 /* Update dot in the region ?
4206 We only do this if the section is going to be allocated,
4207 since unallocated sections do not contribute to the region's
4208 overall size in memory.
4210 If the SEC_NEVER_LOAD bit is not set, it will affect the
4211 addresses of sections after it. We have to update
4213 if (os
->region
!= NULL
4214 && ((os
->bfd_section
->flags
& SEC_NEVER_LOAD
) == 0
4215 || (os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))))
4217 os
->region
->current
= dot
;
4220 /* Make sure the new address is within the region. */
4221 os_region_check (os
, os
->region
, os
->addr_tree
,
4222 os
->bfd_section
->vma
);
4224 /* If there's no load address specified, use the run
4225 region as the load region. */
4226 if (os
->lma_region
== NULL
&& os
->load_base
== NULL
)
4227 os
->lma_region
= os
->region
;
4229 if (os
->lma_region
!= NULL
&& os
->lma_region
!= os
->region
)
4231 /* Set load_base, which will be handled later. */
4232 os
->load_base
= exp_intop (os
->lma_region
->current
);
4233 os
->lma_region
->current
+=
4234 TO_ADDR (os
->bfd_section
->size
);
4236 os_region_check (os
, os
->lma_region
, NULL
,
4237 os
->bfd_section
->lma
);
4243 case lang_constructors_statement_enum
:
4244 dot
= lang_size_sections_1 (constructor_list
.head
,
4245 output_section_statement
,
4246 &s
->wild_statement
.children
.head
,
4247 fill
, dot
, relax
, check_regions
);
4250 case lang_data_statement_enum
:
4252 unsigned int size
= 0;
4254 s
->data_statement
.output_vma
=
4255 dot
- output_section_statement
->bfd_section
->vma
;
4256 s
->data_statement
.output_section
=
4257 output_section_statement
->bfd_section
;
4259 /* We might refer to provided symbols in the expression, and
4260 need to mark them as needed. */
4261 exp_fold_tree (s
->data_statement
.exp
, bfd_abs_section_ptr
,
4262 lang_allocating_phase_enum
, dot
, &dot
);
4264 switch (s
->data_statement
.type
)
4282 if (size
< TO_SIZE ((unsigned) 1))
4283 size
= TO_SIZE ((unsigned) 1);
4284 dot
+= TO_ADDR (size
);
4285 output_section_statement
->bfd_section
->size
+= size
;
4289 case lang_reloc_statement_enum
:
4293 s
->reloc_statement
.output_vma
=
4294 dot
- output_section_statement
->bfd_section
->vma
;
4295 s
->reloc_statement
.output_section
=
4296 output_section_statement
->bfd_section
;
4297 size
= bfd_get_reloc_size (s
->reloc_statement
.howto
);
4298 dot
+= TO_ADDR (size
);
4299 output_section_statement
->bfd_section
->size
+= size
;
4303 case lang_wild_statement_enum
:
4305 dot
= lang_size_sections_1 (s
->wild_statement
.children
.head
,
4306 output_section_statement
,
4307 &s
->wild_statement
.children
.head
,
4308 fill
, dot
, relax
, check_regions
);
4312 case lang_object_symbols_statement_enum
:
4313 link_info
.create_object_symbols_section
=
4314 output_section_statement
->bfd_section
;
4316 case lang_output_statement_enum
:
4317 case lang_target_statement_enum
:
4319 case lang_input_section_enum
:
4323 i
= (*prev
)->input_section
.section
;
4328 if (! bfd_relax_section (i
->owner
, i
, &link_info
, &again
))
4329 einfo (_("%P%F: can't relax section: %E\n"));
4333 dot
= size_input_section (prev
, output_section_statement
,
4334 output_section_statement
->fill
, dot
);
4337 case lang_input_statement_enum
:
4339 case lang_fill_statement_enum
:
4340 s
->fill_statement
.output_section
=
4341 output_section_statement
->bfd_section
;
4343 fill
= s
->fill_statement
.fill
;
4345 case lang_assignment_statement_enum
:
4347 bfd_vma newdot
= dot
;
4349 exp_fold_tree (s
->assignment_statement
.exp
,
4350 output_section_statement
->bfd_section
,
4351 lang_allocating_phase_enum
,
4357 if (output_section_statement
== abs_output_section
)
4359 /* If we don't have an output section, then just adjust
4360 the default memory address. */
4361 lang_memory_region_lookup (DEFAULT_MEMORY_REGION
,
4362 FALSE
)->current
= newdot
;
4366 /* Insert a pad after this statement. We can't
4367 put the pad before when relaxing, in case the
4368 assignment references dot. */
4369 insert_pad (&s
->header
.next
, fill
, TO_SIZE (newdot
- dot
),
4370 output_section_statement
->bfd_section
, dot
);
4372 /* Don't neuter the pad below when relaxing. */
4376 /* If dot is advanced, this implies that the section should
4377 have space allocated to it, unless the user has explicitly
4378 stated that the section should never be loaded. */
4379 if (!(output_section_statement
->flags
4380 & (SEC_NEVER_LOAD
| SEC_ALLOC
)))
4381 output_section_statement
->bfd_section
->flags
|= SEC_ALLOC
;
4388 case lang_padding_statement_enum
:
4389 /* If this is the first time lang_size_sections is called,
4390 we won't have any padding statements. If this is the
4391 second or later passes when relaxing, we should allow
4392 padding to shrink. If padding is needed on this pass, it
4393 will be added back in. */
4394 s
->padding_statement
.size
= 0;
4396 /* Make sure output_offset is valid. If relaxation shrinks
4397 the section and this pad isn't needed, it's possible to
4398 have output_offset larger than the final size of the
4399 section. bfd_set_section_contents will complain even for
4400 a pad size of zero. */
4401 s
->padding_statement
.output_offset
4402 = dot
- output_section_statement
->bfd_section
->vma
;
4405 case lang_group_statement_enum
:
4406 dot
= lang_size_sections_1 (s
->group_statement
.children
.head
,
4407 output_section_statement
,
4408 &s
->group_statement
.children
.head
,
4409 fill
, dot
, relax
, check_regions
);
4416 /* We can only get here when relaxing is turned on. */
4417 case lang_address_statement_enum
:
4420 prev
= &s
->header
.next
;
4427 (lang_statement_union_type
*s
,
4428 lang_output_section_statement_type
*output_section_statement
,
4429 lang_statement_union_type
**prev
,
4433 bfd_boolean check_regions
)
4437 /* Callers of exp_fold_tree need to increment this. */
4438 lang_statement_iteration
++;
4440 exp_data_seg
.phase
= exp_dataseg_none
;
4441 result
= lang_size_sections_1 (s
, output_section_statement
, prev
, fill
,
4442 dot
, relax
, check_regions
);
4443 if (exp_data_seg
.phase
== exp_dataseg_end_seen
4444 && link_info
.relro
&& exp_data_seg
.relro_end
)
4446 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END pair was seen, try
4447 to put exp_data_seg.relro on a (common) page boundary. */
4448 bfd_vma old_min_base
, relro_end
, maxpage
;
4450 exp_data_seg
.phase
= exp_dataseg_relro_adjust
;
4451 old_min_base
= exp_data_seg
.min_base
;
4452 maxpage
= exp_data_seg
.maxpagesize
;
4453 exp_data_seg
.base
+= (-exp_data_seg
.relro_end
4454 & (exp_data_seg
.pagesize
- 1));
4455 /* Compute the expected PT_GNU_RELRO segment end. */
4456 relro_end
= (exp_data_seg
.relro_end
+ exp_data_seg
.pagesize
- 1)
4457 & ~(exp_data_seg
.pagesize
- 1);
4458 if (old_min_base
+ maxpage
< exp_data_seg
.base
)
4460 exp_data_seg
.base
-= maxpage
;
4461 relro_end
-= maxpage
;
4463 result
= lang_size_sections_1 (s
, output_section_statement
, prev
, fill
,
4464 dot
, relax
, check_regions
);
4465 if (exp_data_seg
.relro_end
> relro_end
)
4467 /* The alignment of sections between DATA_SEGMENT_ALIGN
4468 and DATA_SEGMENT_RELRO_END caused huge padding to be
4469 inserted at DATA_SEGMENT_RELRO_END. Try some other base. */
4471 unsigned int max_alignment_power
= 0;
4473 /* Find maximum alignment power of sections between
4474 DATA_SEGMENT_ALIGN and DATA_SEGMENT_RELRO_END. */
4475 for (sec
= output_bfd
->sections
; sec
; sec
= sec
->next
)
4476 if (sec
->vma
>= exp_data_seg
.base
4477 && sec
->vma
< exp_data_seg
.relro_end
4478 && sec
->alignment_power
> max_alignment_power
)
4479 max_alignment_power
= sec
->alignment_power
;
4481 if (((bfd_vma
) 1 << max_alignment_power
) < exp_data_seg
.pagesize
)
4483 if (exp_data_seg
.base
- (1 << max_alignment_power
)
4485 exp_data_seg
.base
+= exp_data_seg
.pagesize
;
4486 exp_data_seg
.base
-= (1 << max_alignment_power
);
4487 result
= lang_size_sections_1 (s
, output_section_statement
,
4488 prev
, fill
, dot
, relax
,
4492 link_info
.relro_start
= exp_data_seg
.base
;
4493 link_info
.relro_end
= exp_data_seg
.relro_end
;
4495 else if (exp_data_seg
.phase
== exp_dataseg_end_seen
)
4497 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether
4498 a page could be saved in the data segment. */
4499 bfd_vma first
, last
;
4501 first
= -exp_data_seg
.base
& (exp_data_seg
.pagesize
- 1);
4502 last
= exp_data_seg
.end
& (exp_data_seg
.pagesize
- 1);
4504 && ((exp_data_seg
.base
& ~(exp_data_seg
.pagesize
- 1))
4505 != (exp_data_seg
.end
& ~(exp_data_seg
.pagesize
- 1)))
4506 && first
+ last
<= exp_data_seg
.pagesize
)
4508 exp_data_seg
.phase
= exp_dataseg_adjust
;
4509 lang_statement_iteration
++;
4510 result
= lang_size_sections_1 (s
, output_section_statement
, prev
,
4511 fill
, dot
, relax
, check_regions
);
4518 /* Worker function for lang_do_assignments. Recursiveness goes here. */
4521 lang_do_assignments_1
4522 (lang_statement_union_type
*s
,
4523 lang_output_section_statement_type
*output_section_statement
,
4527 for (; s
!= NULL
; s
= s
->header
.next
)
4529 switch (s
->header
.type
)
4531 case lang_constructors_statement_enum
:
4532 dot
= lang_do_assignments_1 (constructor_list
.head
,
4533 output_section_statement
,
4538 case lang_output_section_statement_enum
:
4540 lang_output_section_statement_type
*os
;
4542 os
= &(s
->output_section_statement
);
4543 if (os
->bfd_section
!= NULL
&& !os
->ignored
)
4545 dot
= os
->bfd_section
->vma
;
4546 lang_do_assignments_1 (os
->children
.head
, os
, os
->fill
, dot
);
4547 /* .tbss sections effectively have zero size. */
4548 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
4549 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
4550 || link_info
.relocatable
)
4551 dot
+= TO_ADDR (os
->bfd_section
->size
);
4555 /* If nothing has been placed into the output section then
4556 it won't have a bfd_section. */
4557 if (os
->bfd_section
&& !os
->ignored
)
4559 os
->bfd_section
->lma
4560 = exp_get_abs_int (os
->load_base
, 0, "load base",
4561 lang_final_phase_enum
);
4566 case lang_wild_statement_enum
:
4568 dot
= lang_do_assignments_1 (s
->wild_statement
.children
.head
,
4569 output_section_statement
,
4574 case lang_object_symbols_statement_enum
:
4575 case lang_output_statement_enum
:
4576 case lang_target_statement_enum
:
4578 case lang_data_statement_enum
:
4580 etree_value_type value
;
4582 value
= exp_fold_tree (s
->data_statement
.exp
,
4583 bfd_abs_section_ptr
,
4584 lang_final_phase_enum
, dot
, &dot
);
4586 einfo (_("%F%P: invalid data statement\n"));
4587 s
->data_statement
.value
4588 = value
.value
+ value
.section
->vma
;
4592 switch (s
->data_statement
.type
)
4610 if (size
< TO_SIZE ((unsigned) 1))
4611 size
= TO_SIZE ((unsigned) 1);
4612 dot
+= TO_ADDR (size
);
4616 case lang_reloc_statement_enum
:
4618 etree_value_type value
;
4620 value
= exp_fold_tree (s
->reloc_statement
.addend_exp
,
4621 bfd_abs_section_ptr
,
4622 lang_final_phase_enum
, dot
, &dot
);
4623 s
->reloc_statement
.addend_value
= value
.value
;
4625 einfo (_("%F%P: invalid reloc statement\n"));
4627 dot
+= TO_ADDR (bfd_get_reloc_size (s
->reloc_statement
.howto
));
4630 case lang_input_section_enum
:
4632 asection
*in
= s
->input_section
.section
;
4634 if ((in
->flags
& SEC_EXCLUDE
) == 0)
4635 dot
+= TO_ADDR (in
->size
);
4639 case lang_input_statement_enum
:
4641 case lang_fill_statement_enum
:
4642 fill
= s
->fill_statement
.fill
;
4644 case lang_assignment_statement_enum
:
4646 exp_fold_tree (s
->assignment_statement
.exp
,
4647 output_section_statement
->bfd_section
,
4648 lang_final_phase_enum
,
4654 case lang_padding_statement_enum
:
4655 dot
+= TO_ADDR (s
->padding_statement
.size
);
4658 case lang_group_statement_enum
:
4659 dot
= lang_do_assignments_1 (s
->group_statement
.children
.head
,
4660 output_section_statement
,
4668 case lang_address_statement_enum
:
4678 (lang_statement_union_type
*s
,
4679 lang_output_section_statement_type
*output_section_statement
,
4683 /* Callers of exp_fold_tree need to increment this. */
4684 lang_statement_iteration
++;
4685 lang_do_assignments_1 (s
, output_section_statement
, fill
, dot
);
4688 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
4689 operator .startof. (section_name), it produces an undefined symbol
4690 .startof.section_name. Similarly, when it sees
4691 .sizeof. (section_name), it produces an undefined symbol
4692 .sizeof.section_name. For all the output sections, we look for
4693 such symbols, and set them to the correct value. */
4696 lang_set_startof (void)
4700 if (link_info
.relocatable
)
4703 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
4705 const char *secname
;
4707 struct bfd_link_hash_entry
*h
;
4709 secname
= bfd_get_section_name (output_bfd
, s
);
4710 buf
= xmalloc (10 + strlen (secname
));
4712 sprintf (buf
, ".startof.%s", secname
);
4713 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
4714 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
4716 h
->type
= bfd_link_hash_defined
;
4717 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, s
);
4718 h
->u
.def
.section
= bfd_abs_section_ptr
;
4721 sprintf (buf
, ".sizeof.%s", secname
);
4722 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
4723 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
4725 h
->type
= bfd_link_hash_defined
;
4726 h
->u
.def
.value
= TO_ADDR (s
->size
);
4727 h
->u
.def
.section
= bfd_abs_section_ptr
;
4737 struct bfd_link_hash_entry
*h
;
4740 if (link_info
.relocatable
|| link_info
.shared
)
4745 if (entry_symbol
.name
== NULL
)
4747 /* No entry has been specified. Look for the default entry, but
4748 don't warn if we don't find it. */
4749 entry_symbol
.name
= entry_symbol_default
;
4753 h
= bfd_link_hash_lookup (link_info
.hash
, entry_symbol
.name
,
4754 FALSE
, FALSE
, TRUE
);
4756 && (h
->type
== bfd_link_hash_defined
4757 || h
->type
== bfd_link_hash_defweak
)
4758 && h
->u
.def
.section
->output_section
!= NULL
)
4762 val
= (h
->u
.def
.value
4763 + bfd_get_section_vma (output_bfd
,
4764 h
->u
.def
.section
->output_section
)
4765 + h
->u
.def
.section
->output_offset
);
4766 if (! bfd_set_start_address (output_bfd
, val
))
4767 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol
.name
);
4774 /* We couldn't find the entry symbol. Try parsing it as a
4776 val
= bfd_scan_vma (entry_symbol
.name
, &send
, 0);
4779 if (! bfd_set_start_address (output_bfd
, val
))
4780 einfo (_("%P%F: can't set start address\n"));
4786 /* Can't find the entry symbol, and it's not a number. Use
4787 the first address in the text section. */
4788 ts
= bfd_get_section_by_name (output_bfd
, entry_section
);
4792 einfo (_("%P: warning: cannot find entry symbol %s;"
4793 " defaulting to %V\n"),
4795 bfd_get_section_vma (output_bfd
, ts
));
4796 if (! bfd_set_start_address (output_bfd
,
4797 bfd_get_section_vma (output_bfd
,
4799 einfo (_("%P%F: can't set start address\n"));
4804 einfo (_("%P: warning: cannot find entry symbol %s;"
4805 " not setting start address\n"),
4811 /* Don't bfd_hash_table_free (&lang_definedness_table);
4812 map file output may result in a call of lang_track_definedness. */
4815 /* This is a small function used when we want to ignore errors from
4819 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED
, ...)
4821 /* Don't do anything. */
4824 /* Check that the architecture of all the input files is compatible
4825 with the output file. Also call the backend to let it do any
4826 other checking that is needed. */
4831 lang_statement_union_type
*file
;
4833 const bfd_arch_info_type
*compatible
;
4835 for (file
= file_chain
.head
; file
!= NULL
; file
= file
->input_statement
.next
)
4837 input_bfd
= file
->input_statement
.the_bfd
;
4839 = bfd_arch_get_compatible (input_bfd
, output_bfd
,
4840 command_line
.accept_unknown_input_arch
);
4842 /* In general it is not possible to perform a relocatable
4843 link between differing object formats when the input
4844 file has relocations, because the relocations in the
4845 input format may not have equivalent representations in
4846 the output format (and besides BFD does not translate
4847 relocs for other link purposes than a final link). */
4848 if ((link_info
.relocatable
|| link_info
.emitrelocations
)
4849 && (compatible
== NULL
4850 || bfd_get_flavour (input_bfd
) != bfd_get_flavour (output_bfd
))
4851 && (bfd_get_file_flags (input_bfd
) & HAS_RELOC
) != 0)
4853 einfo (_("%P%F: Relocatable linking with relocations from"
4854 " format %s (%B) to format %s (%B) is not supported\n"),
4855 bfd_get_target (input_bfd
), input_bfd
,
4856 bfd_get_target (output_bfd
), output_bfd
);
4857 /* einfo with %F exits. */
4860 if (compatible
== NULL
)
4862 if (command_line
.warn_mismatch
)
4863 einfo (_("%P: warning: %s architecture of input file `%B'"
4864 " is incompatible with %s output\n"),
4865 bfd_printable_name (input_bfd
), input_bfd
,
4866 bfd_printable_name (output_bfd
));
4868 else if (bfd_count_sections (input_bfd
))
4870 /* If the input bfd has no contents, it shouldn't set the
4871 private data of the output bfd. */
4873 bfd_error_handler_type pfn
= NULL
;
4875 /* If we aren't supposed to warn about mismatched input
4876 files, temporarily set the BFD error handler to a
4877 function which will do nothing. We still want to call
4878 bfd_merge_private_bfd_data, since it may set up
4879 information which is needed in the output file. */
4880 if (! command_line
.warn_mismatch
)
4881 pfn
= bfd_set_error_handler (ignore_bfd_errors
);
4882 if (! bfd_merge_private_bfd_data (input_bfd
, output_bfd
))
4884 if (command_line
.warn_mismatch
)
4885 einfo (_("%P%X: failed to merge target specific data"
4886 " of file %B\n"), input_bfd
);
4888 if (! command_line
.warn_mismatch
)
4889 bfd_set_error_handler (pfn
);
4894 /* Look through all the global common symbols and attach them to the
4895 correct section. The -sort-common command line switch may be used
4896 to roughly sort the entries by size. */
4901 if (command_line
.inhibit_common_definition
)
4903 if (link_info
.relocatable
4904 && ! command_line
.force_common_definition
)
4907 if (! config
.sort_common
)
4908 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, NULL
);
4913 for (power
= 4; power
>= 0; power
--)
4914 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, &power
);
4918 /* Place one common symbol in the correct section. */
4921 lang_one_common (struct bfd_link_hash_entry
*h
, void *info
)
4923 unsigned int power_of_two
;
4927 if (h
->type
!= bfd_link_hash_common
)
4931 power_of_two
= h
->u
.c
.p
->alignment_power
;
4933 if (config
.sort_common
4934 && power_of_two
< (unsigned int) *(int *) info
)
4937 section
= h
->u
.c
.p
->section
;
4939 /* Increase the size of the section to align the common sym. */
4940 section
->size
+= ((bfd_vma
) 1 << (power_of_two
+ opb_shift
)) - 1;
4941 section
->size
&= (- (bfd_vma
) 1 << (power_of_two
+ opb_shift
));
4943 /* Adjust the alignment if necessary. */
4944 if (power_of_two
> section
->alignment_power
)
4945 section
->alignment_power
= power_of_two
;
4947 /* Change the symbol from common to defined. */
4948 h
->type
= bfd_link_hash_defined
;
4949 h
->u
.def
.section
= section
;
4950 h
->u
.def
.value
= section
->size
;
4952 /* Increase the size of the section. */
4953 section
->size
+= size
;
4955 /* Make sure the section is allocated in memory, and make sure that
4956 it is no longer a common section. */
4957 section
->flags
|= SEC_ALLOC
;
4958 section
->flags
&= ~SEC_IS_COMMON
;
4960 if (config
.map_file
!= NULL
)
4962 static bfd_boolean header_printed
;
4967 if (! header_printed
)
4969 minfo (_("\nAllocating common symbols\n"));
4970 minfo (_("Common symbol size file\n\n"));
4971 header_printed
= TRUE
;
4974 name
= demangle (h
->root
.string
);
4976 len
= strlen (name
);
4991 if (size
<= 0xffffffff)
4992 sprintf (buf
, "%lx", (unsigned long) size
);
4994 sprintf_vma (buf
, size
);
5004 minfo ("%B\n", section
->owner
);
5010 /* Run through the input files and ensure that every input section has
5011 somewhere to go. If one is found without a destination then create
5012 an input request and place it into the statement tree. */
5015 lang_place_orphans (void)
5017 LANG_FOR_EACH_INPUT_STATEMENT (file
)
5021 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
5023 if (s
->output_section
== NULL
)
5025 /* This section of the file is not attached, root
5026 around for a sensible place for it to go. */
5028 if (file
->just_syms_flag
)
5029 bfd_link_just_syms (file
->the_bfd
, s
, &link_info
);
5030 else if ((s
->flags
& SEC_EXCLUDE
) != 0)
5031 s
->output_section
= bfd_abs_section_ptr
;
5032 else if (strcmp (s
->name
, "COMMON") == 0)
5034 /* This is a lonely common section which must have
5035 come from an archive. We attach to the section
5036 with the wildcard. */
5037 if (! link_info
.relocatable
5038 || command_line
.force_common_definition
)
5040 if (default_common_section
== NULL
)
5042 default_common_section
=
5043 lang_output_section_statement_lookup (".bss");
5046 lang_add_section (&default_common_section
->children
, s
,
5047 default_common_section
, file
);
5050 else if (ldemul_place_orphan (file
, s
))
5054 lang_output_section_statement_type
*os
;
5056 os
= lang_output_section_statement_lookup (s
->name
);
5057 lang_add_section (&os
->children
, s
, os
, file
);
5065 lang_set_flags (lang_memory_region_type
*ptr
, const char *flags
, int invert
)
5067 flagword
*ptr_flags
;
5069 ptr_flags
= invert
? &ptr
->not_flags
: &ptr
->flags
;
5075 *ptr_flags
|= SEC_ALLOC
;
5079 *ptr_flags
|= SEC_READONLY
;
5083 *ptr_flags
|= SEC_DATA
;
5087 *ptr_flags
|= SEC_CODE
;
5092 *ptr_flags
|= SEC_LOAD
;
5096 einfo (_("%P%F: invalid syntax in flags\n"));
5103 /* Call a function on each input file. This function will be called
5104 on an archive, but not on the elements. */
5107 lang_for_each_input_file (void (*func
) (lang_input_statement_type
*))
5109 lang_input_statement_type
*f
;
5111 for (f
= (lang_input_statement_type
*) input_file_chain
.head
;
5113 f
= (lang_input_statement_type
*) f
->next_real_file
)
5117 /* Call a function on each file. The function will be called on all
5118 the elements of an archive which are included in the link, but will
5119 not be called on the archive file itself. */
5122 lang_for_each_file (void (*func
) (lang_input_statement_type
*))
5124 LANG_FOR_EACH_INPUT_STATEMENT (f
)
5131 ldlang_add_file (lang_input_statement_type
*entry
)
5135 lang_statement_append (&file_chain
,
5136 (lang_statement_union_type
*) entry
,
5139 /* The BFD linker needs to have a list of all input BFDs involved in
5141 ASSERT (entry
->the_bfd
->link_next
== NULL
);
5142 ASSERT (entry
->the_bfd
!= output_bfd
);
5143 for (pp
= &link_info
.input_bfds
; *pp
!= NULL
; pp
= &(*pp
)->link_next
)
5145 *pp
= entry
->the_bfd
;
5146 entry
->the_bfd
->usrdata
= entry
;
5147 bfd_set_gp_size (entry
->the_bfd
, g_switch_value
);
5149 /* Look through the sections and check for any which should not be
5150 included in the link. We need to do this now, so that we can
5151 notice when the backend linker tries to report multiple
5152 definition errors for symbols which are in sections we aren't
5153 going to link. FIXME: It might be better to entirely ignore
5154 symbols which are defined in sections which are going to be
5155 discarded. This would require modifying the backend linker for
5156 each backend which might set the SEC_LINK_ONCE flag. If we do
5157 this, we should probably handle SEC_EXCLUDE in the same way. */
5159 bfd_map_over_sections (entry
->the_bfd
, section_already_linked
, entry
);
5163 lang_add_output (const char *name
, int from_script
)
5165 /* Make -o on command line override OUTPUT in script. */
5166 if (!had_output_filename
|| !from_script
)
5168 output_filename
= name
;
5169 had_output_filename
= TRUE
;
5173 static lang_output_section_statement_type
*current_section
;
5184 for (l
= 0; l
< 32; l
++)
5186 if (i
>= (unsigned int) x
)
5194 lang_output_section_statement_type
*
5195 lang_enter_output_section_statement (const char *output_section_statement_name
,
5196 etree_type
*address_exp
,
5197 enum section_type sectype
,
5199 etree_type
*subalign
,
5203 lang_output_section_statement_type
*os
;
5207 lang_output_section_statement_lookup_1 (output_section_statement_name
,
5210 /* Make next things chain into subchain of this. */
5212 if (os
->addr_tree
== NULL
)
5214 os
->addr_tree
= address_exp
;
5216 os
->sectype
= sectype
;
5217 if (sectype
!= noload_section
)
5218 os
->flags
= SEC_NO_FLAGS
;
5220 os
->flags
= SEC_NEVER_LOAD
;
5221 os
->block_value
= 1;
5222 stat_ptr
= &os
->children
;
5224 os
->subsection_alignment
=
5225 topower (exp_get_value_int (subalign
, -1, "subsection alignment", 0));
5226 os
->section_alignment
=
5227 topower (exp_get_value_int (align
, -1, "section alignment", 0));
5229 os
->load_base
= ebase
;
5236 lang_output_statement_type
*new =
5237 new_stat (lang_output_statement
, stat_ptr
);
5239 new->name
= output_filename
;
5242 /* Reset the current counters in the regions. */
5245 lang_reset_memory_regions (void)
5247 lang_memory_region_type
*p
= lang_memory_region_list
;
5250 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
5252 p
->old_length
= (bfd_size_type
) (p
->current
- p
->origin
);
5253 p
->current
= p
->origin
;
5256 for (o
= output_bfd
->sections
; o
!= NULL
; o
= o
->next
)
5258 /* Save the last size for possible use by bfd_relax_section. */
5259 o
->rawsize
= o
->size
;
5264 /* Worker for lang_gc_sections_1. */
5267 gc_section_callback (lang_wild_statement_type
*ptr
,
5268 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
5270 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
5271 void *data ATTRIBUTE_UNUSED
)
5273 /* If the wild pattern was marked KEEP, the member sections
5274 should be as well. */
5275 if (ptr
->keep_sections
)
5276 section
->flags
|= SEC_KEEP
;
5279 /* Iterate over sections marking them against GC. */
5282 lang_gc_sections_1 (lang_statement_union_type
*s
)
5284 for (; s
!= NULL
; s
= s
->header
.next
)
5286 switch (s
->header
.type
)
5288 case lang_wild_statement_enum
:
5289 walk_wild (&s
->wild_statement
, gc_section_callback
, NULL
);
5291 case lang_constructors_statement_enum
:
5292 lang_gc_sections_1 (constructor_list
.head
);
5294 case lang_output_section_statement_enum
:
5295 lang_gc_sections_1 (s
->output_section_statement
.children
.head
);
5297 case lang_group_statement_enum
:
5298 lang_gc_sections_1 (s
->group_statement
.children
.head
);
5307 lang_gc_sections (void)
5309 struct bfd_link_hash_entry
*h
;
5310 ldlang_undef_chain_list_type
*ulist
;
5312 /* Keep all sections so marked in the link script. */
5314 lang_gc_sections_1 (statement_list
.head
);
5316 /* Keep all sections containing symbols undefined on the command-line,
5317 and the section containing the entry symbol. */
5319 for (ulist
= link_info
.gc_sym_list
; ulist
; ulist
= ulist
->next
)
5321 h
= bfd_link_hash_lookup (link_info
.hash
, ulist
->name
,
5322 FALSE
, FALSE
, FALSE
);
5325 && (h
->type
== bfd_link_hash_defined
5326 || h
->type
== bfd_link_hash_defweak
)
5327 && ! bfd_is_abs_section (h
->u
.def
.section
))
5329 h
->u
.def
.section
->flags
|= SEC_KEEP
;
5333 /* SEC_EXCLUDE is ignored when doing a relocatable link, except in
5334 the special case of debug info. (See bfd/stabs.c)
5335 Twiddle the flag here, to simplify later linker code. */
5336 if (link_info
.relocatable
)
5338 LANG_FOR_EACH_INPUT_STATEMENT (f
)
5341 for (sec
= f
->the_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5342 if ((sec
->flags
& SEC_DEBUGGING
) == 0)
5343 sec
->flags
&= ~SEC_EXCLUDE
;
5347 if (link_info
.gc_sections
)
5348 bfd_gc_sections (output_bfd
, &link_info
);
5354 current_target
= default_target
;
5356 /* Open the output file. */
5357 lang_for_each_statement (ldlang_open_output
);
5360 ldemul_create_output_section_statements ();
5362 /* Add to the hash table all undefineds on the command line. */
5363 lang_place_undefineds ();
5365 if (!bfd_section_already_linked_table_init ())
5366 einfo (_("%P%F: Failed to create hash table\n"));
5368 /* Create a bfd for each input file. */
5369 current_target
= default_target
;
5370 open_input_bfds (statement_list
.head
, FALSE
);
5372 link_info
.gc_sym_list
= &entry_symbol
;
5373 if (entry_symbol
.name
== NULL
)
5374 link_info
.gc_sym_list
= ldlang_undef_chain_list_head
;
5376 ldemul_after_open ();
5378 bfd_section_already_linked_table_free ();
5380 /* Make sure that we're not mixing architectures. We call this
5381 after all the input files have been opened, but before we do any
5382 other processing, so that any operations merge_private_bfd_data
5383 does on the output file will be known during the rest of the
5387 /* Handle .exports instead of a version script if we're told to do so. */
5388 if (command_line
.version_exports_section
)
5389 lang_do_version_exports_section ();
5391 /* Build all sets based on the information gathered from the input
5393 ldctor_build_sets ();
5395 /* Remove unreferenced sections if asked to. */
5396 lang_gc_sections ();
5398 /* Size up the common data. */
5401 /* Update wild statements. */
5402 update_wild_statements (statement_list
.head
);
5404 /* Run through the contours of the script and attach input sections
5405 to the correct output sections. */
5406 map_input_to_output_sections (statement_list
.head
, NULL
, NULL
);
5408 /* Find any sections not attached explicitly and handle them. */
5409 lang_place_orphans ();
5411 if (! link_info
.relocatable
)
5415 /* Merge SEC_MERGE sections. This has to be done after GC of
5416 sections, so that GCed sections are not merged, but before
5417 assigning dynamic symbols, since removing whole input sections
5419 bfd_merge_sections (output_bfd
, &link_info
);
5421 /* Look for a text section and set the readonly attribute in it. */
5422 found
= bfd_get_section_by_name (output_bfd
, ".text");
5426 if (config
.text_read_only
)
5427 found
->flags
|= SEC_READONLY
;
5429 found
->flags
&= ~SEC_READONLY
;
5433 /* Do anything special before sizing sections. This is where ELF
5434 and other back-ends size dynamic sections. */
5435 ldemul_before_allocation ();
5437 /* We must record the program headers before we try to fix the
5438 section positions, since they will affect SIZEOF_HEADERS. */
5439 lang_record_phdrs ();
5441 /* Size up the sections. */
5442 lang_size_sections (statement_list
.head
, abs_output_section
,
5443 &statement_list
.head
, 0, 0, NULL
,
5444 command_line
.relax
? FALSE
: TRUE
);
5446 /* Now run around and relax if we can. */
5447 if (command_line
.relax
)
5449 /* Keep relaxing until bfd_relax_section gives up. */
5450 bfd_boolean relax_again
;
5454 relax_again
= FALSE
;
5456 /* Note: pe-dll.c does something like this also. If you find
5457 you need to change this code, you probably need to change
5458 pe-dll.c also. DJ */
5460 /* Do all the assignments with our current guesses as to
5462 lang_do_assignments (statement_list
.head
, abs_output_section
,
5465 /* We must do this after lang_do_assignments, because it uses
5467 lang_reset_memory_regions ();
5469 /* Perform another relax pass - this time we know where the
5470 globals are, so can make a better guess. */
5471 lang_size_sections (statement_list
.head
, abs_output_section
,
5472 &statement_list
.head
, 0, 0, &relax_again
, FALSE
);
5474 /* If the normal relax is done and the relax finalize pass
5475 is not performed yet, we perform another relax pass. */
5476 if (!relax_again
&& link_info
.need_relax_finalize
)
5478 link_info
.need_relax_finalize
= FALSE
;
5482 while (relax_again
);
5484 /* Final extra sizing to report errors. */
5485 lang_do_assignments (statement_list
.head
, abs_output_section
, NULL
, 0);
5486 lang_reset_memory_regions ();
5487 lang_size_sections (statement_list
.head
, abs_output_section
,
5488 &statement_list
.head
, 0, 0, NULL
, TRUE
);
5491 /* See if anything special should be done now we know how big
5493 ldemul_after_allocation ();
5495 /* Fix any .startof. or .sizeof. symbols. */
5496 lang_set_startof ();
5498 /* Do all the assignments, now that we know the final resting places
5499 of all the symbols. */
5501 lang_do_assignments (statement_list
.head
, abs_output_section
, NULL
, 0);
5503 /* Make sure that the section addresses make sense. */
5504 if (! link_info
.relocatable
5505 && command_line
.check_section_addresses
)
5506 lang_check_section_addresses ();
5513 /* EXPORTED TO YACC */
5516 lang_add_wild (struct wildcard_spec
*filespec
,
5517 struct wildcard_list
*section_list
,
5518 bfd_boolean keep_sections
)
5520 struct wildcard_list
*curr
, *next
;
5521 lang_wild_statement_type
*new;
5523 /* Reverse the list as the parser puts it back to front. */
5524 for (curr
= section_list
, section_list
= NULL
;
5526 section_list
= curr
, curr
= next
)
5528 if (curr
->spec
.name
!= NULL
&& strcmp (curr
->spec
.name
, "COMMON") == 0)
5529 placed_commons
= TRUE
;
5532 curr
->next
= section_list
;
5535 if (filespec
!= NULL
&& filespec
->name
!= NULL
)
5537 if (strcmp (filespec
->name
, "*") == 0)
5538 filespec
->name
= NULL
;
5539 else if (! wildcardp (filespec
->name
))
5540 lang_has_input_file
= TRUE
;
5543 new = new_stat (lang_wild_statement
, stat_ptr
);
5544 new->filename
= NULL
;
5545 new->filenames_sorted
= FALSE
;
5546 if (filespec
!= NULL
)
5548 new->filename
= filespec
->name
;
5549 new->filenames_sorted
= filespec
->sorted
== by_name
;
5551 new->section_list
= section_list
;
5552 new->keep_sections
= keep_sections
;
5553 lang_list_init (&new->children
);
5554 analyze_walk_wild_section_handler (new);
5558 lang_section_start (const char *name
, etree_type
*address
,
5559 const segment_type
*segment
)
5561 lang_address_statement_type
*ad
;
5563 ad
= new_stat (lang_address_statement
, stat_ptr
);
5564 ad
->section_name
= name
;
5565 ad
->address
= address
;
5566 ad
->segment
= segment
;
5569 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
5570 because of a -e argument on the command line, or zero if this is
5571 called by ENTRY in a linker script. Command line arguments take
5575 lang_add_entry (const char *name
, bfd_boolean cmdline
)
5577 if (entry_symbol
.name
== NULL
5579 || ! entry_from_cmdline
)
5581 entry_symbol
.name
= name
;
5582 entry_from_cmdline
= cmdline
;
5586 /* Set the default start symbol to NAME. .em files should use this,
5587 not lang_add_entry, to override the use of "start" if neither the
5588 linker script nor the command line specifies an entry point. NAME
5589 must be permanently allocated. */
5591 lang_default_entry (const char *name
)
5593 entry_symbol_default
= name
;
5597 lang_add_target (const char *name
)
5599 lang_target_statement_type
*new = new_stat (lang_target_statement
,
5607 lang_add_map (const char *name
)
5614 map_option_f
= TRUE
;
5622 lang_add_fill (fill_type
*fill
)
5624 lang_fill_statement_type
*new = new_stat (lang_fill_statement
,
5631 lang_add_data (int type
, union etree_union
*exp
)
5634 lang_data_statement_type
*new = new_stat (lang_data_statement
,
5642 /* Create a new reloc statement. RELOC is the BFD relocation type to
5643 generate. HOWTO is the corresponding howto structure (we could
5644 look this up, but the caller has already done so). SECTION is the
5645 section to generate a reloc against, or NAME is the name of the
5646 symbol to generate a reloc against. Exactly one of SECTION and
5647 NAME must be NULL. ADDEND is an expression for the addend. */
5650 lang_add_reloc (bfd_reloc_code_real_type reloc
,
5651 reloc_howto_type
*howto
,
5654 union etree_union
*addend
)
5656 lang_reloc_statement_type
*p
= new_stat (lang_reloc_statement
, stat_ptr
);
5660 p
->section
= section
;
5662 p
->addend_exp
= addend
;
5664 p
->addend_value
= 0;
5665 p
->output_section
= NULL
;
5669 lang_assignment_statement_type
*
5670 lang_add_assignment (etree_type
*exp
)
5672 lang_assignment_statement_type
*new = new_stat (lang_assignment_statement
,
5680 lang_add_attribute (enum statement_enum attribute
)
5682 new_statement (attribute
, sizeof (lang_statement_union_type
), stat_ptr
);
5686 lang_startup (const char *name
)
5688 if (startup_file
!= NULL
)
5690 einfo (_("%P%Fmultiple STARTUP files\n"));
5692 first_file
->filename
= name
;
5693 first_file
->local_sym_name
= name
;
5694 first_file
->real
= TRUE
;
5696 startup_file
= name
;
5700 lang_float (bfd_boolean maybe
)
5702 lang_float_flag
= maybe
;
5706 /* Work out the load- and run-time regions from a script statement, and
5707 store them in *LMA_REGION and *REGION respectively.
5709 MEMSPEC is the name of the run-time region, or the value of
5710 DEFAULT_MEMORY_REGION if the statement didn't specify one.
5711 LMA_MEMSPEC is the name of the load-time region, or null if the
5712 statement didn't specify one.HAVE_LMA_P is TRUE if the statement
5713 had an explicit load address.
5715 It is an error to specify both a load region and a load address. */
5718 lang_get_regions (lang_memory_region_type
**region
,
5719 lang_memory_region_type
**lma_region
,
5720 const char *memspec
,
5721 const char *lma_memspec
,
5722 bfd_boolean have_lma
,
5723 bfd_boolean have_vma
)
5725 *lma_region
= lang_memory_region_lookup (lma_memspec
, FALSE
);
5727 /* If no runtime region or VMA has been specified, but the load region
5728 has been specified, then use the load region for the runtime region
5730 if (lma_memspec
!= NULL
5732 && strcmp (memspec
, DEFAULT_MEMORY_REGION
) == 0)
5733 *region
= *lma_region
;
5735 *region
= lang_memory_region_lookup (memspec
, FALSE
);
5737 if (have_lma
&& lma_memspec
!= 0)
5738 einfo (_("%X%P:%S: section has both a load address and a load region\n"));
5742 lang_leave_output_section_statement (fill_type
*fill
, const char *memspec
,
5743 lang_output_section_phdr_list
*phdrs
,
5744 const char *lma_memspec
)
5746 lang_get_regions (¤t_section
->region
,
5747 ¤t_section
->lma_region
,
5748 memspec
, lma_memspec
,
5749 current_section
->load_base
!= NULL
,
5750 current_section
->addr_tree
!= NULL
);
5751 current_section
->fill
= fill
;
5752 current_section
->phdrs
= phdrs
;
5753 stat_ptr
= &statement_list
;
5756 /* Create an absolute symbol with the given name with the value of the
5757 address of first byte of the section named.
5759 If the symbol already exists, then do nothing. */
5762 lang_abs_symbol_at_beginning_of (const char *secname
, const char *name
)
5764 struct bfd_link_hash_entry
*h
;
5766 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
5768 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5770 if (h
->type
== bfd_link_hash_new
5771 || h
->type
== bfd_link_hash_undefined
)
5775 h
->type
= bfd_link_hash_defined
;
5777 sec
= bfd_get_section_by_name (output_bfd
, secname
);
5781 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, sec
);
5783 h
->u
.def
.section
= bfd_abs_section_ptr
;
5787 /* Create an absolute symbol with the given name with the value of the
5788 address of the first byte after the end of the section named.
5790 If the symbol already exists, then do nothing. */
5793 lang_abs_symbol_at_end_of (const char *secname
, const char *name
)
5795 struct bfd_link_hash_entry
*h
;
5797 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
5799 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5801 if (h
->type
== bfd_link_hash_new
5802 || h
->type
== bfd_link_hash_undefined
)
5806 h
->type
= bfd_link_hash_defined
;
5808 sec
= bfd_get_section_by_name (output_bfd
, secname
);
5812 h
->u
.def
.value
= (bfd_get_section_vma (output_bfd
, sec
)
5813 + TO_ADDR (sec
->size
));
5815 h
->u
.def
.section
= bfd_abs_section_ptr
;
5820 lang_statement_append (lang_statement_list_type
*list
,
5821 lang_statement_union_type
*element
,
5822 lang_statement_union_type
**field
)
5824 *(list
->tail
) = element
;
5828 /* Set the output format type. -oformat overrides scripts. */
5831 lang_add_output_format (const char *format
,
5836 if (output_target
== NULL
|| !from_script
)
5838 if (command_line
.endian
== ENDIAN_BIG
5841 else if (command_line
.endian
== ENDIAN_LITTLE
5845 output_target
= format
;
5849 /* Enter a group. This creates a new lang_group_statement, and sets
5850 stat_ptr to build new statements within the group. */
5853 lang_enter_group (void)
5855 lang_group_statement_type
*g
;
5857 g
= new_stat (lang_group_statement
, stat_ptr
);
5858 lang_list_init (&g
->children
);
5859 stat_ptr
= &g
->children
;
5862 /* Leave a group. This just resets stat_ptr to start writing to the
5863 regular list of statements again. Note that this will not work if
5864 groups can occur inside anything else which can adjust stat_ptr,
5865 but currently they can't. */
5868 lang_leave_group (void)
5870 stat_ptr
= &statement_list
;
5873 /* Add a new program header. This is called for each entry in a PHDRS
5874 command in a linker script. */
5877 lang_new_phdr (const char *name
,
5879 bfd_boolean filehdr
,
5884 struct lang_phdr
*n
, **pp
;
5886 n
= stat_alloc (sizeof (struct lang_phdr
));
5889 n
->type
= exp_get_value_int (type
, 0, "program header type",
5890 lang_final_phase_enum
);
5891 n
->filehdr
= filehdr
;
5896 for (pp
= &lang_phdr_list
; *pp
!= NULL
; pp
= &(*pp
)->next
)
5901 /* Record the program header information in the output BFD. FIXME: We
5902 should not be calling an ELF specific function here. */
5905 lang_record_phdrs (void)
5909 lang_output_section_phdr_list
*last
;
5910 struct lang_phdr
*l
;
5911 lang_output_section_statement_type
*os
;
5914 secs
= xmalloc (alc
* sizeof (asection
*));
5916 for (l
= lang_phdr_list
; l
!= NULL
; l
= l
->next
)
5923 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5927 lang_output_section_phdr_list
*pl
;
5929 if (os
->constraint
== -1)
5937 if (os
->sectype
== noload_section
5938 || os
->bfd_section
== NULL
5939 || (os
->bfd_section
->flags
& SEC_ALLOC
) == 0)
5944 if (os
->bfd_section
== NULL
)
5947 for (; pl
!= NULL
; pl
= pl
->next
)
5949 if (strcmp (pl
->name
, l
->name
) == 0)
5954 secs
= xrealloc (secs
, alc
* sizeof (asection
*));
5956 secs
[c
] = os
->bfd_section
;
5963 if (l
->flags
== NULL
)
5966 flags
= exp_get_vma (l
->flags
, 0, "phdr flags",
5967 lang_final_phase_enum
);
5972 at
= exp_get_vma (l
->at
, 0, "phdr load address",
5973 lang_final_phase_enum
);
5975 if (! bfd_record_phdr (output_bfd
, l
->type
,
5976 l
->flags
!= NULL
, flags
, l
->at
!= NULL
,
5977 at
, l
->filehdr
, l
->phdrs
, c
, secs
))
5978 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
5983 /* Make sure all the phdr assignments succeeded. */
5984 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5988 lang_output_section_phdr_list
*pl
;
5990 if (os
->constraint
== -1
5991 || os
->bfd_section
== NULL
)
5994 for (pl
= os
->phdrs
;
5997 if (! pl
->used
&& strcmp (pl
->name
, "NONE") != 0)
5998 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
5999 os
->name
, pl
->name
);
6003 /* Record a list of sections which may not be cross referenced. */
6006 lang_add_nocrossref (lang_nocrossref_type
*l
)
6008 struct lang_nocrossrefs
*n
;
6010 n
= xmalloc (sizeof *n
);
6011 n
->next
= nocrossref_list
;
6013 nocrossref_list
= n
;
6015 /* Set notice_all so that we get informed about all symbols. */
6016 link_info
.notice_all
= TRUE
;
6019 /* Overlay handling. We handle overlays with some static variables. */
6021 /* The overlay virtual address. */
6022 static etree_type
*overlay_vma
;
6023 /* And subsection alignment. */
6024 static etree_type
*overlay_subalign
;
6026 /* An expression for the maximum section size seen so far. */
6027 static etree_type
*overlay_max
;
6029 /* A list of all the sections in this overlay. */
6031 struct overlay_list
{
6032 struct overlay_list
*next
;
6033 lang_output_section_statement_type
*os
;
6036 static struct overlay_list
*overlay_list
;
6038 /* Start handling an overlay. */
6041 lang_enter_overlay (etree_type
*vma_expr
, etree_type
*subalign
)
6043 /* The grammar should prevent nested overlays from occurring. */
6044 ASSERT (overlay_vma
== NULL
6045 && overlay_subalign
== NULL
6046 && overlay_max
== NULL
);
6048 overlay_vma
= vma_expr
;
6049 overlay_subalign
= subalign
;
6052 /* Start a section in an overlay. We handle this by calling
6053 lang_enter_output_section_statement with the correct VMA.
6054 lang_leave_overlay sets up the LMA and memory regions. */
6057 lang_enter_overlay_section (const char *name
)
6059 struct overlay_list
*n
;
6062 lang_enter_output_section_statement (name
, overlay_vma
, normal_section
,
6063 0, overlay_subalign
, 0, 0);
6065 /* If this is the first section, then base the VMA of future
6066 sections on this one. This will work correctly even if `.' is
6067 used in the addresses. */
6068 if (overlay_list
== NULL
)
6069 overlay_vma
= exp_nameop (ADDR
, name
);
6071 /* Remember the section. */
6072 n
= xmalloc (sizeof *n
);
6073 n
->os
= current_section
;
6074 n
->next
= overlay_list
;
6077 size
= exp_nameop (SIZEOF
, name
);
6079 /* Arrange to work out the maximum section end address. */
6080 if (overlay_max
== NULL
)
6083 overlay_max
= exp_binop (MAX_K
, overlay_max
, size
);
6086 /* Finish a section in an overlay. There isn't any special to do
6090 lang_leave_overlay_section (fill_type
*fill
,
6091 lang_output_section_phdr_list
*phdrs
)
6098 name
= current_section
->name
;
6100 /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory
6101 region and that no load-time region has been specified. It doesn't
6102 really matter what we say here, since lang_leave_overlay will
6104 lang_leave_output_section_statement (fill
, DEFAULT_MEMORY_REGION
, phdrs
, 0);
6106 /* Define the magic symbols. */
6108 clean
= xmalloc (strlen (name
) + 1);
6110 for (s1
= name
; *s1
!= '\0'; s1
++)
6111 if (ISALNUM (*s1
) || *s1
== '_')
6115 buf
= xmalloc (strlen (clean
) + sizeof "__load_start_");
6116 sprintf (buf
, "__load_start_%s", clean
);
6117 lang_add_assignment (exp_assop ('=', buf
,
6118 exp_nameop (LOADADDR
, name
)));
6120 buf
= xmalloc (strlen (clean
) + sizeof "__load_stop_");
6121 sprintf (buf
, "__load_stop_%s", clean
);
6122 lang_add_assignment (exp_assop ('=', buf
,
6124 exp_nameop (LOADADDR
, name
),
6125 exp_nameop (SIZEOF
, name
))));
6130 /* Finish an overlay. If there are any overlay wide settings, this
6131 looks through all the sections in the overlay and sets them. */
6134 lang_leave_overlay (etree_type
*lma_expr
,
6137 const char *memspec
,
6138 lang_output_section_phdr_list
*phdrs
,
6139 const char *lma_memspec
)
6141 lang_memory_region_type
*region
;
6142 lang_memory_region_type
*lma_region
;
6143 struct overlay_list
*l
;
6144 lang_nocrossref_type
*nocrossref
;
6146 lang_get_regions (®ion
, &lma_region
,
6147 memspec
, lma_memspec
,
6148 lma_expr
!= NULL
, FALSE
);
6152 /* After setting the size of the last section, set '.' to end of the
6154 if (overlay_list
!= NULL
)
6155 overlay_list
->os
->update_dot_tree
6156 = exp_assop ('=', ".", exp_binop ('+', overlay_vma
, overlay_max
));
6161 struct overlay_list
*next
;
6163 if (fill
!= NULL
&& l
->os
->fill
== NULL
)
6166 l
->os
->region
= region
;
6167 l
->os
->lma_region
= lma_region
;
6169 /* The first section has the load address specified in the
6170 OVERLAY statement. The rest are worked out from that.
6171 The base address is not needed (and should be null) if
6172 an LMA region was specified. */
6174 l
->os
->load_base
= lma_expr
;
6175 else if (lma_region
== 0)
6176 l
->os
->load_base
= exp_binop ('+',
6177 exp_nameop (LOADADDR
, l
->next
->os
->name
),
6178 exp_nameop (SIZEOF
, l
->next
->os
->name
));
6180 if (phdrs
!= NULL
&& l
->os
->phdrs
== NULL
)
6181 l
->os
->phdrs
= phdrs
;
6185 lang_nocrossref_type
*nc
;
6187 nc
= xmalloc (sizeof *nc
);
6188 nc
->name
= l
->os
->name
;
6189 nc
->next
= nocrossref
;
6198 if (nocrossref
!= NULL
)
6199 lang_add_nocrossref (nocrossref
);
6202 overlay_list
= NULL
;
6206 /* Version handling. This is only useful for ELF. */
6208 /* This global variable holds the version tree that we build. */
6210 struct bfd_elf_version_tree
*lang_elf_version_info
;
6212 /* If PREV is NULL, return first version pattern matching particular symbol.
6213 If PREV is non-NULL, return first version pattern matching particular
6214 symbol after PREV (previously returned by lang_vers_match). */
6216 static struct bfd_elf_version_expr
*
6217 lang_vers_match (struct bfd_elf_version_expr_head
*head
,
6218 struct bfd_elf_version_expr
*prev
,
6221 const char *cxx_sym
= sym
;
6222 const char *java_sym
= sym
;
6223 struct bfd_elf_version_expr
*expr
= NULL
;
6225 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
6227 cxx_sym
= cplus_demangle (sym
, DMGL_PARAMS
| DMGL_ANSI
);
6231 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
6233 java_sym
= cplus_demangle (sym
, DMGL_JAVA
);
6238 if (head
->htab
&& (prev
== NULL
|| prev
->symbol
))
6240 struct bfd_elf_version_expr e
;
6242 switch (prev
? prev
->mask
: 0)
6245 if (head
->mask
& BFD_ELF_VERSION_C_TYPE
)
6248 expr
= htab_find (head
->htab
, &e
);
6249 while (expr
&& strcmp (expr
->symbol
, sym
) == 0)
6250 if (expr
->mask
== BFD_ELF_VERSION_C_TYPE
)
6256 case BFD_ELF_VERSION_C_TYPE
:
6257 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
6260 expr
= htab_find (head
->htab
, &e
);
6261 while (expr
&& strcmp (expr
->symbol
, cxx_sym
) == 0)
6262 if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
6268 case BFD_ELF_VERSION_CXX_TYPE
:
6269 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
6271 e
.symbol
= java_sym
;
6272 expr
= htab_find (head
->htab
, &e
);
6273 while (expr
&& strcmp (expr
->symbol
, java_sym
) == 0)
6274 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
6285 /* Finally, try the wildcards. */
6286 if (prev
== NULL
|| prev
->symbol
)
6287 expr
= head
->remaining
;
6294 if (expr
->pattern
[0] == '*' && expr
->pattern
[1] == '\0')
6297 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
6299 else if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
6303 if (fnmatch (expr
->pattern
, s
, 0) == 0)
6310 free ((char *) cxx_sym
);
6311 if (java_sym
!= sym
)
6312 free ((char *) java_sym
);
6316 /* Return NULL if the PATTERN argument is a glob pattern, otherwise,
6317 return a string pointing to the symbol name. */
6320 realsymbol (const char *pattern
)
6323 bfd_boolean changed
= FALSE
, backslash
= FALSE
;
6324 char *s
, *symbol
= xmalloc (strlen (pattern
) + 1);
6326 for (p
= pattern
, s
= symbol
; *p
!= '\0'; ++p
)
6328 /* It is a glob pattern only if there is no preceding
6330 if (! backslash
&& (*p
== '?' || *p
== '*' || *p
== '['))
6338 /* Remove the preceding backslash. */
6345 backslash
= *p
== '\\';
6360 /* This is called for each variable name or match expression. */
6362 struct bfd_elf_version_expr
*
6363 lang_new_vers_pattern (struct bfd_elf_version_expr
*orig
,
6367 struct bfd_elf_version_expr
*ret
;
6369 ret
= xmalloc (sizeof *ret
);
6374 ret
->symbol
= realsymbol (new);
6376 if (lang
== NULL
|| strcasecmp (lang
, "C") == 0)
6377 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
6378 else if (strcasecmp (lang
, "C++") == 0)
6379 ret
->mask
= BFD_ELF_VERSION_CXX_TYPE
;
6380 else if (strcasecmp (lang
, "Java") == 0)
6381 ret
->mask
= BFD_ELF_VERSION_JAVA_TYPE
;
6384 einfo (_("%X%P: unknown language `%s' in version information\n"),
6386 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
6389 return ldemul_new_vers_pattern (ret
);
6392 /* This is called for each set of variable names and match
6395 struct bfd_elf_version_tree
*
6396 lang_new_vers_node (struct bfd_elf_version_expr
*globals
,
6397 struct bfd_elf_version_expr
*locals
)
6399 struct bfd_elf_version_tree
*ret
;
6401 ret
= xcalloc (1, sizeof *ret
);
6402 ret
->globals
.list
= globals
;
6403 ret
->locals
.list
= locals
;
6404 ret
->match
= lang_vers_match
;
6405 ret
->name_indx
= (unsigned int) -1;
6409 /* This static variable keeps track of version indices. */
6411 static int version_index
;
6414 version_expr_head_hash (const void *p
)
6416 const struct bfd_elf_version_expr
*e
= p
;
6418 return htab_hash_string (e
->symbol
);
6422 version_expr_head_eq (const void *p1
, const void *p2
)
6424 const struct bfd_elf_version_expr
*e1
= p1
;
6425 const struct bfd_elf_version_expr
*e2
= p2
;
6427 return strcmp (e1
->symbol
, e2
->symbol
) == 0;
6431 lang_finalize_version_expr_head (struct bfd_elf_version_expr_head
*head
)
6434 struct bfd_elf_version_expr
*e
, *next
;
6435 struct bfd_elf_version_expr
**list_loc
, **remaining_loc
;
6437 for (e
= head
->list
; e
; e
= e
->next
)
6441 head
->mask
|= e
->mask
;
6446 head
->htab
= htab_create (count
* 2, version_expr_head_hash
,
6447 version_expr_head_eq
, NULL
);
6448 list_loc
= &head
->list
;
6449 remaining_loc
= &head
->remaining
;
6450 for (e
= head
->list
; e
; e
= next
)
6456 remaining_loc
= &e
->next
;
6460 void **loc
= htab_find_slot (head
->htab
, e
, INSERT
);
6464 struct bfd_elf_version_expr
*e1
, *last
;
6470 if (e1
->mask
== e
->mask
)
6478 while (e1
&& strcmp (e1
->symbol
, e
->symbol
) == 0);
6482 /* This is a duplicate. */
6483 /* FIXME: Memory leak. Sometimes pattern is not
6484 xmalloced alone, but in larger chunk of memory. */
6485 /* free (e->symbol); */
6490 e
->next
= last
->next
;
6498 list_loc
= &e
->next
;
6502 *remaining_loc
= NULL
;
6503 *list_loc
= head
->remaining
;
6506 head
->remaining
= head
->list
;
6509 /* This is called when we know the name and dependencies of the
6513 lang_register_vers_node (const char *name
,
6514 struct bfd_elf_version_tree
*version
,
6515 struct bfd_elf_version_deps
*deps
)
6517 struct bfd_elf_version_tree
*t
, **pp
;
6518 struct bfd_elf_version_expr
*e1
;
6523 if ((name
[0] == '\0' && lang_elf_version_info
!= NULL
)
6524 || (lang_elf_version_info
&& lang_elf_version_info
->name
[0] == '\0'))
6526 einfo (_("%X%P: anonymous version tag cannot be combined"
6527 " with other version tags\n"));
6532 /* Make sure this node has a unique name. */
6533 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6534 if (strcmp (t
->name
, name
) == 0)
6535 einfo (_("%X%P: duplicate version tag `%s'\n"), name
);
6537 lang_finalize_version_expr_head (&version
->globals
);
6538 lang_finalize_version_expr_head (&version
->locals
);
6540 /* Check the global and local match names, and make sure there
6541 aren't any duplicates. */
6543 for (e1
= version
->globals
.list
; e1
!= NULL
; e1
= e1
->next
)
6545 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6547 struct bfd_elf_version_expr
*e2
;
6549 if (t
->locals
.htab
&& e1
->symbol
)
6551 e2
= htab_find (t
->locals
.htab
, e1
);
6552 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
6554 if (e1
->mask
== e2
->mask
)
6555 einfo (_("%X%P: duplicate expression `%s'"
6556 " in version information\n"), e1
->symbol
);
6560 else if (!e1
->symbol
)
6561 for (e2
= t
->locals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
6562 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
6563 && e1
->mask
== e2
->mask
)
6564 einfo (_("%X%P: duplicate expression `%s'"
6565 " in version information\n"), e1
->pattern
);
6569 for (e1
= version
->locals
.list
; e1
!= NULL
; e1
= e1
->next
)
6571 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6573 struct bfd_elf_version_expr
*e2
;
6575 if (t
->globals
.htab
&& e1
->symbol
)
6577 e2
= htab_find (t
->globals
.htab
, e1
);
6578 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
6580 if (e1
->mask
== e2
->mask
)
6581 einfo (_("%X%P: duplicate expression `%s'"
6582 " in version information\n"),
6587 else if (!e1
->symbol
)
6588 for (e2
= t
->globals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
6589 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
6590 && e1
->mask
== e2
->mask
)
6591 einfo (_("%X%P: duplicate expression `%s'"
6592 " in version information\n"), e1
->pattern
);
6596 version
->deps
= deps
;
6597 version
->name
= name
;
6598 if (name
[0] != '\0')
6601 version
->vernum
= version_index
;
6604 version
->vernum
= 0;
6606 for (pp
= &lang_elf_version_info
; *pp
!= NULL
; pp
= &(*pp
)->next
)
6611 /* This is called when we see a version dependency. */
6613 struct bfd_elf_version_deps
*
6614 lang_add_vers_depend (struct bfd_elf_version_deps
*list
, const char *name
)
6616 struct bfd_elf_version_deps
*ret
;
6617 struct bfd_elf_version_tree
*t
;
6619 ret
= xmalloc (sizeof *ret
);
6622 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6624 if (strcmp (t
->name
, name
) == 0)
6626 ret
->version_needed
= t
;
6631 einfo (_("%X%P: unable to find version dependency `%s'\n"), name
);
6637 lang_do_version_exports_section (void)
6639 struct bfd_elf_version_expr
*greg
= NULL
, *lreg
;
6641 LANG_FOR_EACH_INPUT_STATEMENT (is
)
6643 asection
*sec
= bfd_get_section_by_name (is
->the_bfd
, ".exports");
6651 contents
= xmalloc (len
);
6652 if (!bfd_get_section_contents (is
->the_bfd
, sec
, contents
, 0, len
))
6653 einfo (_("%X%P: unable to read .exports section contents\n"), sec
);
6656 while (p
< contents
+ len
)
6658 greg
= lang_new_vers_pattern (greg
, p
, NULL
);
6659 p
= strchr (p
, '\0') + 1;
6662 /* Do not free the contents, as we used them creating the regex. */
6664 /* Do not include this section in the link. */
6665 sec
->flags
|= SEC_EXCLUDE
;
6668 lreg
= lang_new_vers_pattern (NULL
, "*", NULL
);
6669 lang_register_vers_node (command_line
.version_exports_section
,
6670 lang_new_vers_node (greg
, lreg
), NULL
);
6674 lang_add_unique (const char *name
)
6676 struct unique_sections
*ent
;
6678 for (ent
= unique_section_list
; ent
; ent
= ent
->next
)
6679 if (strcmp (ent
->name
, name
) == 0)
6682 ent
= xmalloc (sizeof *ent
);
6683 ent
->name
= xstrdup (name
);
6684 ent
->next
= unique_section_list
;
6685 unique_section_list
= ent
;