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
;
105 /* Functions that traverse the linker script and might evaluate
106 DEFINED() need to increment this. */
107 int lang_statement_iteration
= 0;
109 etree_type
*base
; /* Relocation base - or null */
111 /* Return TRUE if the PATTERN argument is a wildcard pattern.
112 Although backslashes are treated specially if a pattern contains
113 wildcards, we do not consider the mere presence of a backslash to
114 be enough to cause the pattern to be treated as a wildcard.
115 That lets us handle DOS filenames more naturally. */
116 #define wildcardp(pattern) (strpbrk ((pattern), "?*[") != NULL)
118 #define new_stat(x, y) \
119 (x##_type *) new_statement (x##_enum, sizeof (x##_type), y)
121 #define outside_section_address(q) \
122 ((q)->output_offset + (q)->output_section->vma)
124 #define outside_symbol_address(q) \
125 ((q)->value + outside_section_address (q->section))
127 #define SECTION_NAME_MAP_LENGTH (16)
130 stat_alloc (size_t size
)
132 return obstack_alloc (&stat_obstack
, size
);
136 unique_section_p (const asection
*sec
)
138 struct unique_sections
*unam
;
141 if (link_info
.relocatable
142 && sec
->owner
!= NULL
143 && bfd_is_group_section (sec
->owner
, sec
))
147 for (unam
= unique_section_list
; unam
; unam
= unam
->next
)
148 if (wildcardp (unam
->name
)
149 ? fnmatch (unam
->name
, secnam
, 0) == 0
150 : strcmp (unam
->name
, secnam
) == 0)
158 /* Generic traversal routines for finding matching sections. */
160 /* Try processing a section against a wildcard. This just calls
161 the callback unless the filename exclusion list is present
162 and excludes the file. It's hardly ever present so this
163 function is very fast. */
166 walk_wild_consider_section (lang_wild_statement_type
*ptr
,
167 lang_input_statement_type
*file
,
169 struct wildcard_list
*sec
,
173 bfd_boolean skip
= FALSE
;
174 struct name_list
*list_tmp
;
176 /* Don't process sections from files which were
178 for (list_tmp
= sec
->spec
.exclude_name_list
;
180 list_tmp
= list_tmp
->next
)
182 bfd_boolean is_wildcard
= wildcardp (list_tmp
->name
);
184 skip
= fnmatch (list_tmp
->name
, file
->filename
, 0) == 0;
186 skip
= strcmp (list_tmp
->name
, file
->filename
) == 0;
188 /* If this file is part of an archive, and the archive is
189 excluded, exclude this file. */
190 if (! skip
&& file
->the_bfd
!= NULL
191 && file
->the_bfd
->my_archive
!= NULL
192 && file
->the_bfd
->my_archive
->filename
!= NULL
)
195 skip
= fnmatch (list_tmp
->name
,
196 file
->the_bfd
->my_archive
->filename
,
199 skip
= strcmp (list_tmp
->name
,
200 file
->the_bfd
->my_archive
->filename
) == 0;
208 (*callback
) (ptr
, sec
, s
, file
, data
);
211 /* Lowest common denominator routine that can handle everything correctly,
215 walk_wild_section_general (lang_wild_statement_type
*ptr
,
216 lang_input_statement_type
*file
,
221 struct wildcard_list
*sec
;
223 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
225 sec
= ptr
->section_list
;
227 (*callback
) (ptr
, sec
, s
, file
, data
);
231 bfd_boolean skip
= FALSE
;
233 if (sec
->spec
.name
!= NULL
)
235 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
237 if (wildcardp (sec
->spec
.name
))
238 skip
= fnmatch (sec
->spec
.name
, sname
, 0) != 0;
240 skip
= strcmp (sec
->spec
.name
, sname
) != 0;
244 walk_wild_consider_section (ptr
, file
, s
, sec
, callback
, data
);
251 /* Routines to find a single section given its name. If there's more
252 than one section with that name, we report that. */
256 asection
*found_section
;
257 bfd_boolean multiple_sections_found
;
258 } section_iterator_callback_data
;
261 section_iterator_callback (bfd
*bfd ATTRIBUTE_UNUSED
, asection
*s
, void *data
)
263 section_iterator_callback_data
*d
= data
;
265 if (d
->found_section
!= NULL
)
267 d
->multiple_sections_found
= TRUE
;
271 d
->found_section
= s
;
276 find_section (lang_input_statement_type
*file
,
277 struct wildcard_list
*sec
,
278 bfd_boolean
*multiple_sections_found
)
280 section_iterator_callback_data cb_data
= { NULL
, FALSE
};
282 bfd_get_section_by_name_if (file
->the_bfd
, sec
->spec
.name
,
283 section_iterator_callback
, &cb_data
);
284 *multiple_sections_found
= cb_data
.multiple_sections_found
;
285 return cb_data
.found_section
;
288 /* Code for handling simple wildcards without going through fnmatch,
289 which can be expensive because of charset translations etc. */
291 /* A simple wild is a literal string followed by a single '*',
292 where the literal part is at least 4 characters long. */
295 is_simple_wild (const char *name
)
297 size_t len
= strcspn (name
, "*?[");
298 return len
>= 4 && name
[len
] == '*' && name
[len
+ 1] == '\0';
302 match_simple_wild (const char *pattern
, const char *name
)
304 /* The first four characters of the pattern are guaranteed valid
305 non-wildcard characters. So we can go faster. */
306 if (pattern
[0] != name
[0] || pattern
[1] != name
[1]
307 || pattern
[2] != name
[2] || pattern
[3] != name
[3])
312 while (*pattern
!= '*')
313 if (*name
++ != *pattern
++)
319 /* Specialized, optimized routines for handling different kinds of
323 walk_wild_section_specs1_wild0 (lang_wild_statement_type
*ptr
,
324 lang_input_statement_type
*file
,
328 /* We can just do a hash lookup for the section with the right name.
329 But if that lookup discovers more than one section with the name
330 (should be rare), we fall back to the general algorithm because
331 we would otherwise have to sort the sections to make sure they
332 get processed in the bfd's order. */
333 bfd_boolean multiple_sections_found
;
334 struct wildcard_list
*sec0
= ptr
->handler_data
[0];
335 asection
*s0
= find_section (file
, sec0
, &multiple_sections_found
);
337 if (multiple_sections_found
)
338 walk_wild_section_general (ptr
, file
, callback
, data
);
340 walk_wild_consider_section (ptr
, file
, s0
, sec0
, callback
, data
);
344 walk_wild_section_specs1_wild1 (lang_wild_statement_type
*ptr
,
345 lang_input_statement_type
*file
,
350 struct wildcard_list
*wildsec0
= ptr
->handler_data
[0];
352 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
354 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
355 bfd_boolean skip
= !match_simple_wild (wildsec0
->spec
.name
, sname
);
358 walk_wild_consider_section (ptr
, file
, s
, wildsec0
, callback
, data
);
363 walk_wild_section_specs2_wild1 (lang_wild_statement_type
*ptr
,
364 lang_input_statement_type
*file
,
369 struct wildcard_list
*sec0
= ptr
->handler_data
[0];
370 struct wildcard_list
*wildsec1
= ptr
->handler_data
[1];
371 bfd_boolean multiple_sections_found
;
372 asection
*s0
= find_section (file
, sec0
, &multiple_sections_found
);
374 if (multiple_sections_found
)
376 walk_wild_section_general (ptr
, file
, callback
, data
);
380 /* Note that if the section was not found, s0 is NULL and
381 we'll simply never succeed the s == s0 test below. */
382 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
384 /* Recall that in this code path, a section cannot satisfy more
385 than one spec, so if s == s0 then it cannot match
388 walk_wild_consider_section (ptr
, file
, s
, sec0
, callback
, data
);
391 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
392 bfd_boolean skip
= !match_simple_wild (wildsec1
->spec
.name
, sname
);
395 walk_wild_consider_section (ptr
, file
, s
, wildsec1
, callback
,
402 walk_wild_section_specs3_wild2 (lang_wild_statement_type
*ptr
,
403 lang_input_statement_type
*file
,
408 struct wildcard_list
*sec0
= ptr
->handler_data
[0];
409 struct wildcard_list
*wildsec1
= ptr
->handler_data
[1];
410 struct wildcard_list
*wildsec2
= ptr
->handler_data
[2];
411 bfd_boolean multiple_sections_found
;
412 asection
*s0
= find_section (file
, sec0
, &multiple_sections_found
);
414 if (multiple_sections_found
)
416 walk_wild_section_general (ptr
, file
, callback
, data
);
420 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
423 walk_wild_consider_section (ptr
, file
, s
, sec0
, callback
, data
);
426 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
427 bfd_boolean skip
= !match_simple_wild (wildsec1
->spec
.name
, sname
);
430 walk_wild_consider_section (ptr
, file
, s
, wildsec1
, callback
, data
);
433 skip
= !match_simple_wild (wildsec2
->spec
.name
, sname
);
435 walk_wild_consider_section (ptr
, file
, s
, wildsec2
, callback
,
443 walk_wild_section_specs4_wild2 (lang_wild_statement_type
*ptr
,
444 lang_input_statement_type
*file
,
449 struct wildcard_list
*sec0
= ptr
->handler_data
[0];
450 struct wildcard_list
*sec1
= ptr
->handler_data
[1];
451 struct wildcard_list
*wildsec2
= ptr
->handler_data
[2];
452 struct wildcard_list
*wildsec3
= ptr
->handler_data
[3];
453 bfd_boolean multiple_sections_found
;
454 asection
*s0
= find_section (file
, sec0
, &multiple_sections_found
), *s1
;
456 if (multiple_sections_found
)
458 walk_wild_section_general (ptr
, file
, callback
, data
);
462 s1
= find_section (file
, sec1
, &multiple_sections_found
);
463 if (multiple_sections_found
)
465 walk_wild_section_general (ptr
, file
, callback
, data
);
469 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
472 walk_wild_consider_section (ptr
, file
, s
, sec0
, callback
, data
);
475 walk_wild_consider_section (ptr
, file
, s
, sec1
, callback
, data
);
478 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
479 bfd_boolean skip
= !match_simple_wild (wildsec2
->spec
.name
,
483 walk_wild_consider_section (ptr
, file
, s
, wildsec2
, callback
,
487 skip
= !match_simple_wild (wildsec3
->spec
.name
, sname
);
489 walk_wild_consider_section (ptr
, file
, s
, wildsec3
,
497 walk_wild_section (lang_wild_statement_type
*ptr
,
498 lang_input_statement_type
*file
,
502 if (file
->just_syms_flag
)
505 (*ptr
->walk_wild_section_handler
) (ptr
, file
, callback
, data
);
508 /* Returns TRUE when name1 is a wildcard spec that might match
509 something name2 can match. We're conservative: we return FALSE
510 only if the prefixes of name1 and name2 are different up to the
511 first wildcard character. */
514 wild_spec_can_overlap (const char *name1
, const char *name2
)
516 size_t prefix1_len
= strcspn (name1
, "?*[");
517 size_t prefix2_len
= strcspn (name2
, "?*[");
518 size_t min_prefix_len
;
520 /* Note that if there is no wildcard character, then we treat the
521 terminating 0 as part of the prefix. Thus ".text" won't match
522 ".text." or ".text.*", for example. */
523 if (name1
[prefix1_len
] == '\0')
525 if (name2
[prefix2_len
] == '\0')
528 min_prefix_len
= prefix1_len
< prefix2_len
? prefix1_len
: prefix2_len
;
530 return memcmp (name1
, name2
, min_prefix_len
) == 0;
533 /* Select specialized code to handle various kinds of wildcard
537 analyze_walk_wild_section_handler (lang_wild_statement_type
*ptr
)
540 int wild_name_count
= 0;
541 struct wildcard_list
*sec
;
545 ptr
->walk_wild_section_handler
= walk_wild_section_general
;
547 /* Count how many wildcard_specs there are, and how many of those
548 actually use wildcards in the name. Also, bail out if any of the
549 wildcard names are NULL. (Can this actually happen?
550 walk_wild_section used to test for it.) And bail out if any
551 of the wildcards are more complex than a simple string
552 ending in a single '*'. */
553 for (sec
= ptr
->section_list
; sec
!= NULL
; sec
= sec
->next
)
556 if (sec
->spec
.name
== NULL
)
558 if (wildcardp (sec
->spec
.name
))
561 if (!is_simple_wild (sec
->spec
.name
))
566 /* The zero-spec case would be easy to optimize but it doesn't
567 happen in practice. Likewise, more than 4 specs doesn't
568 happen in practice. */
569 if (sec_count
== 0 || sec_count
> 4)
572 /* Check that no two specs can match the same section. */
573 for (sec
= ptr
->section_list
; sec
!= NULL
; sec
= sec
->next
)
575 struct wildcard_list
*sec2
;
576 for (sec2
= sec
->next
; sec2
!= NULL
; sec2
= sec2
->next
)
578 if (wild_spec_can_overlap (sec
->spec
.name
, sec2
->spec
.name
))
583 signature
= (sec_count
<< 8) + wild_name_count
;
587 ptr
->walk_wild_section_handler
= walk_wild_section_specs1_wild0
;
590 ptr
->walk_wild_section_handler
= walk_wild_section_specs1_wild1
;
593 ptr
->walk_wild_section_handler
= walk_wild_section_specs2_wild1
;
596 ptr
->walk_wild_section_handler
= walk_wild_section_specs3_wild2
;
599 ptr
->walk_wild_section_handler
= walk_wild_section_specs4_wild2
;
605 /* Now fill the data array with pointers to the specs, first the
606 specs with non-wildcard names, then the specs with wildcard
607 names. It's OK to process the specs in different order from the
608 given order, because we've already determined that no section
609 will match more than one spec. */
611 for (sec
= ptr
->section_list
; sec
!= NULL
; sec
= sec
->next
)
612 if (!wildcardp (sec
->spec
.name
))
613 ptr
->handler_data
[data_counter
++] = sec
;
614 for (sec
= ptr
->section_list
; sec
!= NULL
; sec
= sec
->next
)
615 if (wildcardp (sec
->spec
.name
))
616 ptr
->handler_data
[data_counter
++] = sec
;
619 /* Handle a wild statement for a single file F. */
622 walk_wild_file (lang_wild_statement_type
*s
,
623 lang_input_statement_type
*f
,
627 if (f
->the_bfd
== NULL
628 || ! bfd_check_format (f
->the_bfd
, bfd_archive
))
629 walk_wild_section (s
, f
, callback
, data
);
634 /* This is an archive file. We must map each member of the
635 archive separately. */
636 member
= bfd_openr_next_archived_file (f
->the_bfd
, NULL
);
637 while (member
!= NULL
)
639 /* When lookup_name is called, it will call the add_symbols
640 entry point for the archive. For each element of the
641 archive which is included, BFD will call ldlang_add_file,
642 which will set the usrdata field of the member to the
643 lang_input_statement. */
644 if (member
->usrdata
!= NULL
)
646 walk_wild_section (s
, member
->usrdata
, callback
, data
);
649 member
= bfd_openr_next_archived_file (f
->the_bfd
, member
);
655 walk_wild (lang_wild_statement_type
*s
, callback_t callback
, void *data
)
657 const char *file_spec
= s
->filename
;
659 if (file_spec
== NULL
)
661 /* Perform the iteration over all files in the list. */
662 LANG_FOR_EACH_INPUT_STATEMENT (f
)
664 walk_wild_file (s
, f
, callback
, data
);
667 else if (wildcardp (file_spec
))
669 LANG_FOR_EACH_INPUT_STATEMENT (f
)
671 if (fnmatch (file_spec
, f
->filename
, FNM_FILE_NAME
) == 0)
672 walk_wild_file (s
, f
, callback
, data
);
677 lang_input_statement_type
*f
;
679 /* Perform the iteration over a single file. */
680 f
= lookup_name (file_spec
);
682 walk_wild_file (s
, f
, callback
, data
);
686 /* lang_for_each_statement walks the parse tree and calls the provided
687 function for each node. */
690 lang_for_each_statement_worker (void (*func
) (lang_statement_union_type
*),
691 lang_statement_union_type
*s
)
693 for (; s
!= NULL
; s
= s
->header
.next
)
697 switch (s
->header
.type
)
699 case lang_constructors_statement_enum
:
700 lang_for_each_statement_worker (func
, constructor_list
.head
);
702 case lang_output_section_statement_enum
:
703 lang_for_each_statement_worker
704 (func
, s
->output_section_statement
.children
.head
);
706 case lang_wild_statement_enum
:
707 lang_for_each_statement_worker (func
,
708 s
->wild_statement
.children
.head
);
710 case lang_group_statement_enum
:
711 lang_for_each_statement_worker (func
,
712 s
->group_statement
.children
.head
);
714 case lang_data_statement_enum
:
715 case lang_reloc_statement_enum
:
716 case lang_object_symbols_statement_enum
:
717 case lang_output_statement_enum
:
718 case lang_target_statement_enum
:
719 case lang_input_section_enum
:
720 case lang_input_statement_enum
:
721 case lang_assignment_statement_enum
:
722 case lang_padding_statement_enum
:
723 case lang_address_statement_enum
:
724 case lang_fill_statement_enum
:
734 lang_for_each_statement (void (*func
) (lang_statement_union_type
*))
736 lang_for_each_statement_worker (func
, statement_list
.head
);
739 /*----------------------------------------------------------------------*/
742 lang_list_init (lang_statement_list_type
*list
)
745 list
->tail
= &list
->head
;
748 /* Build a new statement node for the parse tree. */
750 static lang_statement_union_type
*
751 new_statement (enum statement_enum type
,
753 lang_statement_list_type
*list
)
755 lang_statement_union_type
*new;
757 new = stat_alloc (size
);
758 new->header
.type
= type
;
759 new->header
.next
= NULL
;
760 lang_statement_append (list
, new, &new->header
.next
);
764 /* Build a new input file node for the language. There are several
765 ways in which we treat an input file, eg, we only look at symbols,
766 or prefix it with a -l etc.
768 We can be supplied with requests for input files more than once;
769 they may, for example be split over several lines like foo.o(.text)
770 foo.o(.data) etc, so when asked for a file we check that we haven't
771 got it already so we don't duplicate the bfd. */
773 static lang_input_statement_type
*
774 new_afile (const char *name
,
775 lang_input_file_enum_type file_type
,
777 bfd_boolean add_to_list
)
779 lang_input_statement_type
*p
;
782 p
= new_stat (lang_input_statement
, stat_ptr
);
785 p
= stat_alloc (sizeof (lang_input_statement_type
));
786 p
->header
.type
= lang_input_statement_enum
;
787 p
->header
.next
= NULL
;
790 lang_has_input_file
= TRUE
;
792 p
->sysrooted
= FALSE
;
795 case lang_input_file_is_symbols_only_enum
:
797 p
->is_archive
= FALSE
;
799 p
->local_sym_name
= name
;
800 p
->just_syms_flag
= TRUE
;
801 p
->search_dirs_flag
= FALSE
;
803 case lang_input_file_is_fake_enum
:
805 p
->is_archive
= FALSE
;
807 p
->local_sym_name
= name
;
808 p
->just_syms_flag
= FALSE
;
809 p
->search_dirs_flag
= FALSE
;
811 case lang_input_file_is_l_enum
:
812 p
->is_archive
= TRUE
;
815 p
->local_sym_name
= concat ("-l", name
, NULL
);
816 p
->just_syms_flag
= FALSE
;
817 p
->search_dirs_flag
= TRUE
;
819 case lang_input_file_is_marker_enum
:
821 p
->is_archive
= FALSE
;
823 p
->local_sym_name
= name
;
824 p
->just_syms_flag
= FALSE
;
825 p
->search_dirs_flag
= TRUE
;
827 case lang_input_file_is_search_file_enum
:
828 p
->sysrooted
= ldlang_sysrooted_script
;
830 p
->is_archive
= FALSE
;
832 p
->local_sym_name
= name
;
833 p
->just_syms_flag
= FALSE
;
834 p
->search_dirs_flag
= TRUE
;
836 case lang_input_file_is_file_enum
:
838 p
->is_archive
= FALSE
;
840 p
->local_sym_name
= name
;
841 p
->just_syms_flag
= FALSE
;
842 p
->search_dirs_flag
= FALSE
;
849 p
->next_real_file
= NULL
;
852 p
->dynamic
= config
.dynamic_link
;
853 p
->add_needed
= add_needed
;
854 p
->as_needed
= as_needed
;
855 p
->whole_archive
= whole_archive
;
857 lang_statement_append (&input_file_chain
,
858 (lang_statement_union_type
*) p
,
863 lang_input_statement_type
*
864 lang_add_input_file (const char *name
,
865 lang_input_file_enum_type file_type
,
868 lang_has_input_file
= TRUE
;
869 return new_afile (name
, file_type
, target
, TRUE
);
872 struct output_statement_hash_entry
874 struct bfd_hash_entry root
;
875 lang_output_section_statement_type os
;
878 /* The hash table. */
880 static struct bfd_hash_table output_statement_table
;
882 /* Support routines for the hash table used by lang_output_section_find,
883 initialize the table, fill in an entry and remove the table. */
885 static struct bfd_hash_entry
*
886 output_statement_newfunc (struct bfd_hash_entry
*entry
,
887 struct bfd_hash_table
*table
,
890 lang_output_section_statement_type
**nextp
;
891 struct output_statement_hash_entry
*ret
;
895 entry
= bfd_hash_allocate (table
, sizeof (*ret
));
900 entry
= bfd_hash_newfunc (entry
, table
, string
);
904 ret
= (struct output_statement_hash_entry
*) entry
;
905 memset (&ret
->os
, 0, sizeof (ret
->os
));
906 ret
->os
.header
.type
= lang_output_section_statement_enum
;
907 ret
->os
.subsection_alignment
= -1;
908 ret
->os
.section_alignment
= -1;
909 ret
->os
.block_value
= 1;
910 lang_list_init (&ret
->os
.children
);
911 lang_statement_append (stat_ptr
,
912 (lang_statement_union_type
*) &ret
->os
,
913 &ret
->os
.header
.next
);
915 ret
->os
.prev
= &((*lang_output_section_statement
.tail
)
916 ->output_section_statement
);
917 /* GCC's strict aliasing rules prevent us from just casting the
918 address, so we store the pointer in a variable and cast that
920 nextp
= &ret
->os
.next
;
921 lang_statement_append (&lang_output_section_statement
,
922 (lang_statement_union_type
*) &ret
->os
,
923 (lang_statement_union_type
**) nextp
);
928 output_statement_table_init (void)
930 if (! bfd_hash_table_init_n (&output_statement_table
,
931 output_statement_newfunc
, 61))
932 einfo (_("%P%F: can not create hash table: %E\n"));
936 output_statement_table_free (void)
938 bfd_hash_table_free (&output_statement_table
);
941 /* Build enough state so that the parser can build its tree. */
946 obstack_begin (&stat_obstack
, 1000);
948 stat_ptr
= &statement_list
;
950 output_statement_table_init ();
952 lang_list_init (stat_ptr
);
954 lang_list_init (&input_file_chain
);
955 lang_list_init (&lang_output_section_statement
);
956 lang_list_init (&file_chain
);
957 first_file
= lang_add_input_file (NULL
, lang_input_file_is_marker_enum
,
960 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME
);
962 abs_output_section
->bfd_section
= bfd_abs_section_ptr
;
964 /* The value "3" is ad-hoc, somewhat related to the expected number of
965 DEFINED expressions in a linker script. For most default linker
966 scripts, there are none. Why a hash table then? Well, it's somewhat
967 simpler to re-use working machinery than using a linked list in terms
968 of code-complexity here in ld, besides the initialization which just
969 looks like other code here. */
970 if (!bfd_hash_table_init_n (&lang_definedness_table
,
971 lang_definedness_newfunc
, 3))
972 einfo (_("%P%F: can not create hash table: %E\n"));
978 output_statement_table_free ();
981 /*----------------------------------------------------------------------
982 A region is an area of memory declared with the
983 MEMORY { name:org=exp, len=exp ... }
986 We maintain a list of all the regions here.
988 If no regions are specified in the script, then the default is used
989 which is created when looked up to be the entire data space.
991 If create is true we are creating a region inside a MEMORY block.
992 In this case it is probably an error to create a region that has
993 already been created. If we are not inside a MEMORY block it is
994 dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION)
995 and so we issue a warning. */
997 static lang_memory_region_type
*lang_memory_region_list
;
998 static lang_memory_region_type
**lang_memory_region_list_tail
999 = &lang_memory_region_list
;
1001 lang_memory_region_type
*
1002 lang_memory_region_lookup (const char *const name
, bfd_boolean create
)
1004 lang_memory_region_type
*p
;
1005 lang_memory_region_type
*new;
1007 /* NAME is NULL for LMA memspecs if no region was specified. */
1011 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
1012 if (strcmp (p
->name
, name
) == 0)
1015 einfo (_("%P:%S: warning: redeclaration of memory region '%s'\n"),
1020 if (!create
&& strcmp (name
, DEFAULT_MEMORY_REGION
))
1021 einfo (_("%P:%S: warning: memory region %s not declared\n"), name
);
1023 new = stat_alloc (sizeof (lang_memory_region_type
));
1025 new->name
= xstrdup (name
);
1028 *lang_memory_region_list_tail
= new;
1029 lang_memory_region_list_tail
= &new->next
;
1033 new->length
= ~(bfd_size_type
) 0;
1035 new->had_full_message
= FALSE
;
1040 static lang_memory_region_type
*
1041 lang_memory_default (asection
*section
)
1043 lang_memory_region_type
*p
;
1045 flagword sec_flags
= section
->flags
;
1047 /* Override SEC_DATA to mean a writable section. */
1048 if ((sec_flags
& (SEC_ALLOC
| SEC_READONLY
| SEC_CODE
)) == SEC_ALLOC
)
1049 sec_flags
|= SEC_DATA
;
1051 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
1053 if ((p
->flags
& sec_flags
) != 0
1054 && (p
->not_flags
& sec_flags
) == 0)
1059 return lang_memory_region_lookup (DEFAULT_MEMORY_REGION
, FALSE
);
1062 lang_output_section_statement_type
*
1063 lang_output_section_find (const char *const name
)
1065 struct output_statement_hash_entry
*entry
;
1068 entry
= ((struct output_statement_hash_entry
*)
1069 bfd_hash_lookup (&output_statement_table
, name
, FALSE
, FALSE
));
1073 hash
= entry
->root
.hash
;
1076 if (entry
->os
.constraint
!= -1)
1078 entry
= (struct output_statement_hash_entry
*) entry
->root
.next
;
1080 while (entry
!= NULL
1081 && entry
->root
.hash
== hash
1082 && strcmp (name
, entry
->os
.name
) == 0);
1087 static lang_output_section_statement_type
*
1088 lang_output_section_statement_lookup_1 (const char *const name
, int constraint
)
1090 struct output_statement_hash_entry
*entry
;
1091 struct output_statement_hash_entry
*last_ent
;
1094 entry
= ((struct output_statement_hash_entry
*)
1095 bfd_hash_lookup (&output_statement_table
, name
, TRUE
, FALSE
));
1098 einfo (_("%P%F: failed creating section `%s': %E\n"), name
);
1102 if (entry
->os
.name
!= NULL
)
1104 /* We have a section of this name, but it might not have the correct
1106 hash
= entry
->root
.hash
;
1109 if (entry
->os
.constraint
!= -1
1111 || (constraint
== entry
->os
.constraint
1112 && constraint
!= SPECIAL
)))
1115 entry
= (struct output_statement_hash_entry
*) entry
->root
.next
;
1117 while (entry
!= NULL
1118 && entry
->root
.hash
== hash
1119 && strcmp (name
, entry
->os
.name
) == 0);
1121 entry
= ((struct output_statement_hash_entry
*)
1122 output_statement_newfunc (NULL
, &output_statement_table
, name
));
1125 einfo (_("%P%F: failed creating section `%s': %E\n"), name
);
1128 entry
->root
= last_ent
->root
;
1129 last_ent
->root
.next
= &entry
->root
;
1132 entry
->os
.name
= name
;
1133 entry
->os
.constraint
= constraint
;
1137 lang_output_section_statement_type
*
1138 lang_output_section_statement_lookup (const char *const name
)
1140 return lang_output_section_statement_lookup_1 (name
, 0);
1143 /* A variant of lang_output_section_find used by place_orphan.
1144 Returns the output statement that should precede a new output
1145 statement for SEC. If an exact match is found on certain flags,
1148 lang_output_section_statement_type
*
1149 lang_output_section_find_by_flags (const asection
*sec
,
1150 lang_output_section_statement_type
**exact
)
1152 lang_output_section_statement_type
*first
, *look
, *found
;
1155 /* We know the first statement on this list is *ABS*. May as well
1157 first
= &lang_output_section_statement
.head
->output_section_statement
;
1158 first
= first
->next
;
1160 /* First try for an exact match. */
1162 for (look
= first
; look
; look
= look
->next
)
1164 flags
= look
->flags
;
1165 if (look
->bfd_section
!= NULL
)
1167 flags
= look
->bfd_section
->flags
;
1168 if (!bfd_match_sections_by_type (output_bfd
,
1173 flags
^= sec
->flags
;
1174 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1175 | SEC_CODE
| SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1184 if (sec
->flags
& SEC_CODE
)
1186 /* Try for a rw code section. */
1187 for (look
= first
; look
; look
= look
->next
)
1189 flags
= look
->flags
;
1190 if (look
->bfd_section
!= NULL
)
1192 flags
= look
->bfd_section
->flags
;
1193 if (!bfd_match_sections_by_type (output_bfd
,
1198 flags
^= sec
->flags
;
1199 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1200 | SEC_CODE
| SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1206 if (sec
->flags
& (SEC_READONLY
| SEC_THREAD_LOCAL
))
1208 /* .rodata can go after .text, .sdata2 after .rodata. */
1209 for (look
= first
; look
; look
= look
->next
)
1211 flags
= look
->flags
;
1212 if (look
->bfd_section
!= NULL
)
1214 flags
= look
->bfd_section
->flags
;
1215 if (!bfd_match_sections_by_type (output_bfd
,
1220 flags
^= sec
->flags
;
1221 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1223 && !(look
->flags
& (SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1229 if (sec
->flags
& SEC_SMALL_DATA
)
1231 /* .sdata goes after .data, .sbss after .sdata. */
1232 for (look
= first
; look
; look
= look
->next
)
1234 flags
= look
->flags
;
1235 if (look
->bfd_section
!= NULL
)
1237 flags
= look
->bfd_section
->flags
;
1238 if (!bfd_match_sections_by_type (output_bfd
,
1243 flags
^= sec
->flags
;
1244 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1245 | SEC_THREAD_LOCAL
))
1246 || ((look
->flags
& SEC_SMALL_DATA
)
1247 && !(sec
->flags
& SEC_HAS_CONTENTS
)))
1253 if (sec
->flags
& SEC_HAS_CONTENTS
)
1255 /* .data goes after .rodata. */
1256 for (look
= first
; look
; look
= look
->next
)
1258 flags
= look
->flags
;
1259 if (look
->bfd_section
!= NULL
)
1261 flags
= look
->bfd_section
->flags
;
1262 if (!bfd_match_sections_by_type (output_bfd
,
1267 flags
^= sec
->flags
;
1268 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1269 | SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1275 /* .bss goes last. */
1276 for (look
= first
; look
; look
= look
->next
)
1278 flags
= look
->flags
;
1279 if (look
->bfd_section
!= NULL
)
1281 flags
= look
->bfd_section
->flags
;
1282 if (!bfd_match_sections_by_type (output_bfd
,
1287 flags
^= sec
->flags
;
1288 if (!(flags
& SEC_ALLOC
))
1295 /* Find the last output section before given output statement.
1296 Used by place_orphan. */
1299 output_prev_sec_find (lang_output_section_statement_type
*os
)
1301 lang_output_section_statement_type
*lookup
;
1303 for (lookup
= os
->prev
; lookup
!= NULL
; lookup
= lookup
->prev
)
1305 if (lookup
->constraint
== -1)
1308 if (lookup
->bfd_section
!= NULL
&& lookup
->bfd_section
->owner
!= NULL
)
1309 return lookup
->bfd_section
;
1315 lang_output_section_statement_type
*
1316 lang_insert_orphan (asection
*s
,
1317 const char *secname
,
1318 lang_output_section_statement_type
*after
,
1319 struct orphan_save
*place
,
1320 etree_type
*address
,
1321 lang_statement_list_type
*add_child
)
1323 lang_statement_list_type
*old
;
1324 lang_statement_list_type add
;
1326 etree_type
*load_base
;
1327 lang_output_section_statement_type
*os
;
1328 lang_output_section_statement_type
**os_tail
;
1330 /* Start building a list of statements for this section.
1331 First save the current statement pointer. */
1334 /* If we have found an appropriate place for the output section
1335 statements for this orphan, add them to our own private list,
1336 inserting them later into the global statement list. */
1340 lang_list_init (stat_ptr
);
1344 if (config
.build_constructors
)
1346 /* If the name of the section is representable in C, then create
1347 symbols to mark the start and the end of the section. */
1348 for (ps
= secname
; *ps
!= '\0'; ps
++)
1349 if (! ISALNUM ((unsigned char) *ps
) && *ps
!= '_')
1354 etree_type
*e_align
;
1356 symname
= (char *) xmalloc (ps
- secname
+ sizeof "__start_" + 1);
1357 symname
[0] = bfd_get_symbol_leading_char (output_bfd
);
1358 sprintf (symname
+ (symname
[0] != 0), "__start_%s", secname
);
1359 e_align
= exp_unop (ALIGN_K
,
1360 exp_intop ((bfd_vma
) 1 << s
->alignment_power
));
1361 lang_add_assignment (exp_assop ('=', ".", e_align
));
1362 lang_add_assignment (exp_assop ('=', symname
,
1363 exp_nameop (NAME
, ".")));
1367 if (link_info
.relocatable
|| (s
->flags
& (SEC_LOAD
| SEC_ALLOC
)) == 0)
1368 address
= exp_intop (0);
1371 if (after
!= NULL
&& after
->load_base
!= NULL
)
1373 etree_type
*lma_from_vma
;
1374 lma_from_vma
= exp_binop ('-', after
->load_base
,
1375 exp_nameop (ADDR
, after
->name
));
1376 load_base
= exp_binop ('+', lma_from_vma
,
1377 exp_nameop (ADDR
, secname
));
1380 os_tail
= ((lang_output_section_statement_type
**)
1381 lang_output_section_statement
.tail
);
1382 os
= lang_enter_output_section_statement (secname
, address
, 0, NULL
, NULL
,
1385 if (add_child
== NULL
)
1386 add_child
= &os
->children
;
1387 lang_add_section (add_child
, s
, os
);
1389 lang_leave_output_section_statement (0, "*default*", NULL
, NULL
);
1391 if (config
.build_constructors
&& *ps
== '\0')
1395 /* lang_leave_ouput_section_statement resets stat_ptr.
1396 Put stat_ptr back where we want it. */
1400 symname
= (char *) xmalloc (ps
- secname
+ sizeof "__stop_" + 1);
1401 symname
[0] = bfd_get_symbol_leading_char (output_bfd
);
1402 sprintf (symname
+ (symname
[0] != 0), "__stop_%s", secname
);
1403 lang_add_assignment (exp_assop ('=', symname
,
1404 exp_nameop (NAME
, ".")));
1407 /* Restore the global list pointer. */
1411 if (after
!= NULL
&& os
->bfd_section
!= NULL
)
1413 asection
*snew
, *as
;
1415 snew
= os
->bfd_section
;
1417 /* Shuffle the bfd section list to make the output file look
1418 neater. This is really only cosmetic. */
1419 if (place
->section
== NULL
1420 && after
!= (&lang_output_section_statement
.head
1421 ->output_section_statement
))
1423 asection
*bfd_section
= after
->bfd_section
;
1425 /* If the output statement hasn't been used to place any input
1426 sections (and thus doesn't have an output bfd_section),
1427 look for the closest prior output statement having an
1429 if (bfd_section
== NULL
)
1430 bfd_section
= output_prev_sec_find (after
);
1432 if (bfd_section
!= NULL
&& bfd_section
!= snew
)
1433 place
->section
= &bfd_section
->next
;
1436 if (place
->section
== NULL
)
1437 place
->section
= &output_bfd
->sections
;
1439 as
= *place
->section
;
1440 if (as
!= snew
&& as
->prev
!= snew
)
1442 /* Unlink the section. */
1443 bfd_section_list_remove (output_bfd
, snew
);
1445 /* Now tack it back on in the right place. */
1446 bfd_section_list_insert_before (output_bfd
, as
, snew
);
1449 /* Save the end of this list. Further ophans of this type will
1450 follow the one we've just added. */
1451 place
->section
= &snew
->next
;
1453 /* The following is non-cosmetic. We try to put the output
1454 statements in some sort of reasonable order here, because they
1455 determine the final load addresses of the orphan sections.
1456 In addition, placing output statements in the wrong order may
1457 require extra segments. For instance, given a typical
1458 situation of all read-only sections placed in one segment and
1459 following that a segment containing all the read-write
1460 sections, we wouldn't want to place an orphan read/write
1461 section before or amongst the read-only ones. */
1462 if (add
.head
!= NULL
)
1464 lang_output_section_statement_type
*newly_added_os
;
1466 if (place
->stmt
== NULL
)
1468 lang_statement_union_type
**where
;
1469 lang_statement_union_type
**assign
= NULL
;
1471 /* Look for a suitable place for the new statement list.
1472 The idea is to skip over anything that might be inside
1473 a SECTIONS {} statement in a script, before we find
1474 another output_section_statement. Assignments to "dot"
1475 before an output section statement are assumed to
1477 for (where
= &after
->header
.next
;
1479 where
= &(*where
)->header
.next
)
1481 switch ((*where
)->header
.type
)
1483 case lang_assignment_statement_enum
:
1486 lang_assignment_statement_type
*ass
;
1487 ass
= &(*where
)->assignment_statement
;
1488 if (ass
->exp
->type
.node_class
!= etree_assert
1489 && ass
->exp
->assign
.dst
[0] == '.'
1490 && ass
->exp
->assign
.dst
[1] == 0)
1494 case lang_wild_statement_enum
:
1495 case lang_input_section_enum
:
1496 case lang_object_symbols_statement_enum
:
1497 case lang_fill_statement_enum
:
1498 case lang_data_statement_enum
:
1499 case lang_reloc_statement_enum
:
1500 case lang_padding_statement_enum
:
1501 case lang_constructors_statement_enum
:
1504 case lang_output_section_statement_enum
:
1507 case lang_input_statement_enum
:
1508 case lang_address_statement_enum
:
1509 case lang_target_statement_enum
:
1510 case lang_output_statement_enum
:
1511 case lang_group_statement_enum
:
1512 case lang_afile_asection_pair_statement_enum
:
1521 place
->os_tail
= &after
->next
;
1525 /* Put it after the last orphan statement we added. */
1526 *add
.tail
= *place
->stmt
;
1527 *place
->stmt
= add
.head
;
1530 /* Fix the global list pointer if we happened to tack our
1531 new list at the tail. */
1532 if (*old
->tail
== add
.head
)
1533 old
->tail
= add
.tail
;
1535 /* Save the end of this list. */
1536 place
->stmt
= add
.tail
;
1538 /* Do the same for the list of output section statements. */
1539 newly_added_os
= *os_tail
;
1541 newly_added_os
->next
= *place
->os_tail
;
1542 *place
->os_tail
= newly_added_os
;
1543 place
->os_tail
= &newly_added_os
->next
;
1545 /* Fixing the global list pointer here is a little different.
1546 We added to the list in lang_enter_output_section_statement,
1547 trimmed off the new output_section_statment above when
1548 assigning *os_tail = NULL, but possibly added it back in
1549 the same place when assigning *place->os_tail. */
1550 if (*os_tail
== NULL
)
1551 lang_output_section_statement
.tail
1552 = (lang_statement_union_type
**) os_tail
;
1559 lang_map_flags (flagword flag
)
1561 if (flag
& SEC_ALLOC
)
1564 if (flag
& SEC_CODE
)
1567 if (flag
& SEC_READONLY
)
1570 if (flag
& SEC_DATA
)
1573 if (flag
& SEC_LOAD
)
1580 lang_memory_region_type
*m
;
1583 minfo (_("\nMemory Configuration\n\n"));
1584 fprintf (config
.map_file
, "%-16s %-18s %-18s %s\n",
1585 _("Name"), _("Origin"), _("Length"), _("Attributes"));
1587 for (m
= lang_memory_region_list
; m
!= NULL
; m
= m
->next
)
1592 fprintf (config
.map_file
, "%-16s ", m
->name
);
1594 sprintf_vma (buf
, m
->origin
);
1595 minfo ("0x%s ", buf
);
1603 minfo ("0x%V", m
->length
);
1604 if (m
->flags
|| m
->not_flags
)
1612 lang_map_flags (m
->flags
);
1618 lang_map_flags (m
->not_flags
);
1625 fprintf (config
.map_file
, _("\nLinker script and memory map\n\n"));
1627 if (! command_line
.reduce_memory_overheads
)
1629 obstack_begin (&map_obstack
, 1000);
1630 for (p
= link_info
.input_bfds
; p
!= (bfd
*) NULL
; p
= p
->link_next
)
1631 bfd_map_over_sections (p
, init_map_userdata
, 0);
1632 bfd_link_hash_traverse (link_info
.hash
, sort_def_symbol
, 0);
1634 print_statements ();
1638 init_map_userdata (abfd
, sec
, data
)
1639 bfd
*abfd ATTRIBUTE_UNUSED
;
1641 void *data ATTRIBUTE_UNUSED
;
1643 fat_section_userdata_type
*new_data
1644 = ((fat_section_userdata_type
*) (stat_alloc
1645 (sizeof (fat_section_userdata_type
))));
1647 ASSERT (get_userdata (sec
) == NULL
);
1648 get_userdata (sec
) = new_data
;
1649 new_data
->map_symbol_def_tail
= &new_data
->map_symbol_def_head
;
1653 sort_def_symbol (hash_entry
, info
)
1654 struct bfd_link_hash_entry
*hash_entry
;
1655 void *info ATTRIBUTE_UNUSED
;
1657 if (hash_entry
->type
== bfd_link_hash_defined
1658 || hash_entry
->type
== bfd_link_hash_defweak
)
1660 struct fat_user_section_struct
*ud
;
1661 struct map_symbol_def
*def
;
1663 ud
= get_userdata (hash_entry
->u
.def
.section
);
1666 /* ??? What do we have to do to initialize this beforehand? */
1667 /* The first time we get here is bfd_abs_section... */
1668 init_map_userdata (0, hash_entry
->u
.def
.section
, 0);
1669 ud
= get_userdata (hash_entry
->u
.def
.section
);
1671 else if (!ud
->map_symbol_def_tail
)
1672 ud
->map_symbol_def_tail
= &ud
->map_symbol_def_head
;
1674 def
= obstack_alloc (&map_obstack
, sizeof *def
);
1675 def
->entry
= hash_entry
;
1676 *(ud
->map_symbol_def_tail
) = def
;
1677 ud
->map_symbol_def_tail
= &def
->next
;
1682 /* Initialize an output section. */
1685 init_os (lang_output_section_statement_type
*s
, asection
*isec
)
1687 if (s
->bfd_section
!= NULL
)
1690 if (strcmp (s
->name
, DISCARD_SECTION_NAME
) == 0)
1691 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME
);
1693 s
->bfd_section
= bfd_get_section_by_name (output_bfd
, s
->name
);
1694 if (s
->bfd_section
== NULL
)
1695 s
->bfd_section
= bfd_make_section (output_bfd
, s
->name
);
1696 if (s
->bfd_section
== NULL
)
1698 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
1699 output_bfd
->xvec
->name
, s
->name
);
1701 s
->bfd_section
->output_section
= s
->bfd_section
;
1702 s
->bfd_section
->output_offset
= 0;
1703 if (!command_line
.reduce_memory_overheads
)
1705 fat_section_userdata_type
*new
1706 = stat_alloc (sizeof (fat_section_userdata_type
));
1707 memset (new, 0, sizeof (fat_section_userdata_type
));
1708 get_userdata (s
->bfd_section
) = new;
1712 /* If there is a base address, make sure that any sections it might
1713 mention are initialized. */
1714 if (s
->addr_tree
!= NULL
)
1715 exp_init_os (s
->addr_tree
);
1717 if (s
->load_base
!= NULL
)
1718 exp_init_os (s
->load_base
);
1720 /* If supplied an alignment, set it. */
1721 if (s
->section_alignment
!= -1)
1722 s
->bfd_section
->alignment_power
= s
->section_alignment
;
1725 bfd_init_private_section_data (isec
->owner
, isec
,
1726 output_bfd
, s
->bfd_section
,
1730 /* Make sure that all output sections mentioned in an expression are
1734 exp_init_os (etree_type
*exp
)
1736 switch (exp
->type
.node_class
)
1740 exp_init_os (exp
->assign
.src
);
1744 exp_init_os (exp
->binary
.lhs
);
1745 exp_init_os (exp
->binary
.rhs
);
1749 exp_init_os (exp
->trinary
.cond
);
1750 exp_init_os (exp
->trinary
.lhs
);
1751 exp_init_os (exp
->trinary
.rhs
);
1755 exp_init_os (exp
->assert_s
.child
);
1759 exp_init_os (exp
->unary
.child
);
1763 switch (exp
->type
.node_code
)
1769 lang_output_section_statement_type
*os
;
1771 os
= lang_output_section_find (exp
->name
.name
);
1772 if (os
!= NULL
&& os
->bfd_section
== NULL
)
1784 section_already_linked (bfd
*abfd
, asection
*sec
, void *data
)
1786 lang_input_statement_type
*entry
= data
;
1788 /* If we are only reading symbols from this object, then we want to
1789 discard all sections. */
1790 if (entry
->just_syms_flag
)
1792 bfd_link_just_syms (abfd
, sec
, &link_info
);
1796 if (!(abfd
->flags
& DYNAMIC
))
1797 bfd_section_already_linked (abfd
, sec
);
1800 /* The wild routines.
1802 These expand statements like *(.text) and foo.o to a list of
1803 explicit actions, like foo.o(.text), bar.o(.text) and
1804 foo.o(.text, .data). */
1806 /* Add SECTION to the output section OUTPUT. Do this by creating a
1807 lang_input_section statement which is placed at PTR. FILE is the
1808 input file which holds SECTION. */
1811 lang_add_section (lang_statement_list_type
*ptr
,
1813 lang_output_section_statement_type
*output
)
1815 flagword flags
= section
->flags
;
1816 bfd_boolean discard
;
1818 /* Discard sections marked with SEC_EXCLUDE. */
1819 discard
= (flags
& SEC_EXCLUDE
) != 0;
1821 /* Discard input sections which are assigned to a section named
1822 DISCARD_SECTION_NAME. */
1823 if (strcmp (output
->name
, DISCARD_SECTION_NAME
) == 0)
1826 /* Discard debugging sections if we are stripping debugging
1828 if ((link_info
.strip
== strip_debugger
|| link_info
.strip
== strip_all
)
1829 && (flags
& SEC_DEBUGGING
) != 0)
1834 if (section
->output_section
== NULL
)
1836 /* This prevents future calls from assigning this section. */
1837 section
->output_section
= bfd_abs_section_ptr
;
1842 if (section
->output_section
== NULL
)
1845 lang_input_section_type
*new;
1848 if (output
->bfd_section
== NULL
)
1849 init_os (output
, section
);
1851 first
= ! output
->bfd_section
->linker_has_input
;
1852 output
->bfd_section
->linker_has_input
= 1;
1854 if (!link_info
.relocatable
1855 && !stripped_excluded_sections
)
1857 asection
*s
= output
->bfd_section
->map_tail
.s
;
1858 output
->bfd_section
->map_tail
.s
= section
;
1859 section
->map_head
.s
= NULL
;
1860 section
->map_tail
.s
= s
;
1862 s
->map_head
.s
= section
;
1864 output
->bfd_section
->map_head
.s
= section
;
1867 /* Add a section reference to the list. */
1868 new = new_stat (lang_input_section
, ptr
);
1870 new->section
= section
;
1871 section
->output_section
= output
->bfd_section
;
1873 flags
= section
->flags
;
1875 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1876 to an output section, because we want to be able to include a
1877 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1878 section (I don't know why we want to do this, but we do).
1879 build_link_order in ldwrite.c handles this case by turning
1880 the embedded SEC_NEVER_LOAD section into a fill. */
1882 flags
&= ~ SEC_NEVER_LOAD
;
1884 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1885 already been processed. One reason to do this is that on pe
1886 format targets, .text$foo sections go into .text and it's odd
1887 to see .text with SEC_LINK_ONCE set. */
1889 if (! link_info
.relocatable
)
1890 flags
&= ~ (SEC_LINK_ONCE
| SEC_LINK_DUPLICATES
);
1892 /* If this is not the first input section, and the SEC_READONLY
1893 flag is not currently set, then don't set it just because the
1894 input section has it set. */
1896 if (! first
&& (output
->bfd_section
->flags
& SEC_READONLY
) == 0)
1897 flags
&= ~ SEC_READONLY
;
1899 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1901 && ((output
->bfd_section
->flags
& (SEC_MERGE
| SEC_STRINGS
))
1902 != (flags
& (SEC_MERGE
| SEC_STRINGS
))
1903 || ((flags
& SEC_MERGE
)
1904 && output
->bfd_section
->entsize
!= section
->entsize
)))
1906 output
->bfd_section
->flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1907 flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1910 output
->bfd_section
->flags
|= flags
;
1912 if (flags
& SEC_MERGE
)
1913 output
->bfd_section
->entsize
= section
->entsize
;
1915 /* If SEC_READONLY is not set in the input section, then clear
1916 it from the output section. */
1917 if ((section
->flags
& SEC_READONLY
) == 0)
1918 output
->bfd_section
->flags
&= ~SEC_READONLY
;
1920 switch (output
->sectype
)
1922 case normal_section
:
1927 case overlay_section
:
1928 output
->bfd_section
->flags
&= ~SEC_ALLOC
;
1930 case noload_section
:
1931 output
->bfd_section
->flags
&= ~SEC_LOAD
;
1932 output
->bfd_section
->flags
|= SEC_NEVER_LOAD
;
1936 /* Copy over SEC_SMALL_DATA. */
1937 if (section
->flags
& SEC_SMALL_DATA
)
1938 output
->bfd_section
->flags
|= SEC_SMALL_DATA
;
1940 if (section
->alignment_power
> output
->bfd_section
->alignment_power
)
1941 output
->bfd_section
->alignment_power
= section
->alignment_power
;
1943 if (bfd_get_arch (section
->owner
) == bfd_arch_tic54x
1944 && (section
->flags
& SEC_TIC54X_BLOCK
) != 0)
1946 output
->bfd_section
->flags
|= SEC_TIC54X_BLOCK
;
1947 /* FIXME: This value should really be obtained from the bfd... */
1948 output
->block_value
= 128;
1953 /* Compare sections ASEC and BSEC according to SORT. */
1956 compare_section (sort_type sort
, asection
*asec
, asection
*bsec
)
1965 case by_alignment_name
:
1966 ret
= (bfd_section_alignment (bsec
->owner
, bsec
)
1967 - bfd_section_alignment (asec
->owner
, asec
));
1973 ret
= strcmp (bfd_get_section_name (asec
->owner
, asec
),
1974 bfd_get_section_name (bsec
->owner
, bsec
));
1977 case by_name_alignment
:
1978 ret
= strcmp (bfd_get_section_name (asec
->owner
, asec
),
1979 bfd_get_section_name (bsec
->owner
, bsec
));
1985 ret
= (bfd_section_alignment (bsec
->owner
, bsec
)
1986 - bfd_section_alignment (asec
->owner
, asec
));
1993 /* Handle wildcard sorting. This returns the lang_input_section which
1994 should follow the one we are going to create for SECTION and FILE,
1995 based on the sorting requirements of WILD. It returns NULL if the
1996 new section should just go at the end of the current list. */
1998 static lang_statement_union_type
*
1999 wild_sort (lang_wild_statement_type
*wild
,
2000 struct wildcard_list
*sec
,
2001 lang_input_statement_type
*file
,
2004 const char *section_name
;
2005 lang_statement_union_type
*l
;
2007 if (!wild
->filenames_sorted
2008 && (sec
== NULL
|| sec
->spec
.sorted
== none
))
2011 section_name
= bfd_get_section_name (file
->the_bfd
, section
);
2012 for (l
= wild
->children
.head
; l
!= NULL
; l
= l
->header
.next
)
2014 lang_input_section_type
*ls
;
2016 if (l
->header
.type
!= lang_input_section_enum
)
2018 ls
= &l
->input_section
;
2020 /* Sorting by filename takes precedence over sorting by section
2023 if (wild
->filenames_sorted
)
2025 const char *fn
, *ln
;
2029 /* The PE support for the .idata section as generated by
2030 dlltool assumes that files will be sorted by the name of
2031 the archive and then the name of the file within the
2034 if (file
->the_bfd
!= NULL
2035 && bfd_my_archive (file
->the_bfd
) != NULL
)
2037 fn
= bfd_get_filename (bfd_my_archive (file
->the_bfd
));
2042 fn
= file
->filename
;
2046 if (bfd_my_archive (ls
->section
->owner
) != NULL
)
2048 ln
= bfd_get_filename (bfd_my_archive (ls
->section
->owner
));
2053 ln
= ls
->section
->owner
->filename
;
2057 i
= strcmp (fn
, ln
);
2066 fn
= file
->filename
;
2068 ln
= ls
->section
->owner
->filename
;
2070 i
= strcmp (fn
, ln
);
2078 /* Here either the files are not sorted by name, or we are
2079 looking at the sections for this file. */
2081 if (sec
!= NULL
&& sec
->spec
.sorted
!= none
)
2082 if (compare_section (sec
->spec
.sorted
, section
, ls
->section
) < 0)
2089 /* Expand a wild statement for a particular FILE. SECTION may be
2090 NULL, in which case it is a wild card. */
2093 output_section_callback (lang_wild_statement_type
*ptr
,
2094 struct wildcard_list
*sec
,
2096 lang_input_statement_type
*file
,
2099 lang_statement_union_type
*before
;
2101 /* Exclude sections that match UNIQUE_SECTION_LIST. */
2102 if (unique_section_p (section
))
2105 before
= wild_sort (ptr
, sec
, file
, section
);
2107 /* Here BEFORE points to the lang_input_section which
2108 should follow the one we are about to add. If BEFORE
2109 is NULL, then the section should just go at the end
2110 of the current list. */
2113 lang_add_section (&ptr
->children
, section
,
2114 (lang_output_section_statement_type
*) output
);
2117 lang_statement_list_type list
;
2118 lang_statement_union_type
**pp
;
2120 lang_list_init (&list
);
2121 lang_add_section (&list
, section
,
2122 (lang_output_section_statement_type
*) output
);
2124 /* If we are discarding the section, LIST.HEAD will
2126 if (list
.head
!= NULL
)
2128 ASSERT (list
.head
->header
.next
== NULL
);
2130 for (pp
= &ptr
->children
.head
;
2132 pp
= &(*pp
)->header
.next
)
2133 ASSERT (*pp
!= NULL
);
2135 list
.head
->header
.next
= *pp
;
2141 /* Check if all sections in a wild statement for a particular FILE
2145 check_section_callback (lang_wild_statement_type
*ptr ATTRIBUTE_UNUSED
,
2146 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
2148 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
2151 /* Exclude sections that match UNIQUE_SECTION_LIST. */
2152 if (unique_section_p (section
))
2155 if (section
->output_section
== NULL
&& (section
->flags
& SEC_READONLY
) == 0)
2156 ((lang_output_section_statement_type
*) data
)->all_input_readonly
= FALSE
;
2159 /* This is passed a file name which must have been seen already and
2160 added to the statement tree. We will see if it has been opened
2161 already and had its symbols read. If not then we'll read it. */
2163 static lang_input_statement_type
*
2164 lookup_name (const char *name
)
2166 lang_input_statement_type
*search
;
2168 for (search
= (lang_input_statement_type
*) input_file_chain
.head
;
2170 search
= (lang_input_statement_type
*) search
->next_real_file
)
2172 /* Use the local_sym_name as the name of the file that has
2173 already been loaded as filename might have been transformed
2174 via the search directory lookup mechanism. */
2175 const char * filename
= search
->local_sym_name
;
2177 if (filename
== NULL
&& name
== NULL
)
2179 if (filename
!= NULL
2181 && strcmp (filename
, name
) == 0)
2186 search
= new_afile (name
, lang_input_file_is_search_file_enum
,
2187 default_target
, FALSE
);
2189 /* If we have already added this file, or this file is not real
2190 (FIXME: can that ever actually happen?) or the name is NULL
2191 (FIXME: can that ever actually happen?) don't add this file. */
2194 || search
->filename
== NULL
)
2197 if (! load_symbols (search
, NULL
))
2203 /* Save LIST as a list of libraries whose symbols should not be exported. */
2208 struct excluded_lib
*next
;
2210 static struct excluded_lib
*excluded_libs
;
2213 add_excluded_libs (const char *list
)
2215 const char *p
= list
, *end
;
2219 struct excluded_lib
*entry
;
2220 end
= strpbrk (p
, ",:");
2222 end
= p
+ strlen (p
);
2223 entry
= xmalloc (sizeof (*entry
));
2224 entry
->next
= excluded_libs
;
2225 entry
->name
= xmalloc (end
- p
+ 1);
2226 memcpy (entry
->name
, p
, end
- p
);
2227 entry
->name
[end
- p
] = '\0';
2228 excluded_libs
= entry
;
2236 check_excluded_libs (bfd
*abfd
)
2238 struct excluded_lib
*lib
= excluded_libs
;
2242 int len
= strlen (lib
->name
);
2243 const char *filename
= lbasename (abfd
->filename
);
2245 if (strcmp (lib
->name
, "ALL") == 0)
2247 abfd
->no_export
= TRUE
;
2251 if (strncmp (lib
->name
, filename
, len
) == 0
2252 && (filename
[len
] == '\0'
2253 || (filename
[len
] == '.' && filename
[len
+ 1] == 'a'
2254 && filename
[len
+ 2] == '\0')))
2256 abfd
->no_export
= TRUE
;
2264 /* Get the symbols for an input file. */
2267 load_symbols (lang_input_statement_type
*entry
,
2268 lang_statement_list_type
*place
)
2275 ldfile_open_file (entry
);
2277 if (! bfd_check_format (entry
->the_bfd
, bfd_archive
)
2278 && ! bfd_check_format_matches (entry
->the_bfd
, bfd_object
, &matching
))
2281 lang_statement_list_type
*hold
;
2282 bfd_boolean bad_load
= TRUE
;
2283 bfd_boolean save_ldlang_sysrooted_script
;
2285 err
= bfd_get_error ();
2287 /* See if the emulation has some special knowledge. */
2288 if (ldemul_unrecognized_file (entry
))
2291 if (err
== bfd_error_file_ambiguously_recognized
)
2295 einfo (_("%B: file not recognized: %E\n"), entry
->the_bfd
);
2296 einfo (_("%B: matching formats:"), entry
->the_bfd
);
2297 for (p
= matching
; *p
!= NULL
; p
++)
2301 else if (err
!= bfd_error_file_not_recognized
2303 einfo (_("%F%B: file not recognized: %E\n"), entry
->the_bfd
);
2307 bfd_close (entry
->the_bfd
);
2308 entry
->the_bfd
= NULL
;
2310 /* Try to interpret the file as a linker script. */
2311 ldfile_open_command_file (entry
->filename
);
2315 save_ldlang_sysrooted_script
= ldlang_sysrooted_script
;
2316 ldlang_sysrooted_script
= entry
->sysrooted
;
2318 ldfile_assumed_script
= TRUE
;
2319 parser_input
= input_script
;
2320 /* We want to use the same -Bdynamic/-Bstatic as the one for
2322 config
.dynamic_link
= entry
->dynamic
;
2324 ldfile_assumed_script
= FALSE
;
2326 ldlang_sysrooted_script
= save_ldlang_sysrooted_script
;
2332 if (ldemul_recognized_file (entry
))
2335 /* We don't call ldlang_add_file for an archive. Instead, the
2336 add_symbols entry point will call ldlang_add_file, via the
2337 add_archive_element callback, for each element of the archive
2339 switch (bfd_get_format (entry
->the_bfd
))
2345 ldlang_add_file (entry
);
2346 if (trace_files
|| trace_file_tries
)
2347 info_msg ("%I\n", entry
);
2351 check_excluded_libs (entry
->the_bfd
);
2353 if (entry
->whole_archive
)
2356 bfd_boolean loaded
= TRUE
;
2360 member
= bfd_openr_next_archived_file (entry
->the_bfd
, member
);
2365 if (! bfd_check_format (member
, bfd_object
))
2367 einfo (_("%F%B: member %B in archive is not an object\n"),
2368 entry
->the_bfd
, member
);
2372 if (! ((*link_info
.callbacks
->add_archive_element
)
2373 (&link_info
, member
, "--whole-archive")))
2376 if (! bfd_link_add_symbols (member
, &link_info
))
2378 einfo (_("%F%B: could not read symbols: %E\n"), member
);
2383 entry
->loaded
= loaded
;
2389 if (bfd_link_add_symbols (entry
->the_bfd
, &link_info
))
2390 entry
->loaded
= TRUE
;
2392 einfo (_("%F%B: could not read symbols: %E\n"), entry
->the_bfd
);
2394 return entry
->loaded
;
2397 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
2398 may be NULL, indicating that it is a wildcard. Separate
2399 lang_input_section statements are created for each part of the
2400 expansion; they are added after the wild statement S. OUTPUT is
2401 the output section. */
2404 wild (lang_wild_statement_type
*s
,
2405 const char *target ATTRIBUTE_UNUSED
,
2406 lang_output_section_statement_type
*output
)
2408 struct wildcard_list
*sec
;
2410 walk_wild (s
, output_section_callback
, output
);
2412 for (sec
= s
->section_list
; sec
!= NULL
; sec
= sec
->next
)
2414 if (default_common_section
!= NULL
)
2416 if (sec
->spec
.name
!= NULL
&& strcmp (sec
->spec
.name
, "COMMON") == 0)
2418 /* Remember the section that common is going to in case we
2419 later get something which doesn't know where to put it. */
2420 default_common_section
= output
;
2425 /* Return TRUE iff target is the sought target. */
2428 get_target (const bfd_target
*target
, void *data
)
2430 const char *sought
= data
;
2432 return strcmp (target
->name
, sought
) == 0;
2435 /* Like strcpy() but convert to lower case as well. */
2438 stricpy (char *dest
, char *src
)
2442 while ((c
= *src
++) != 0)
2443 *dest
++ = TOLOWER (c
);
2448 /* Remove the first occurrence of needle (if any) in haystack
2452 strcut (char *haystack
, char *needle
)
2454 haystack
= strstr (haystack
, needle
);
2460 for (src
= haystack
+ strlen (needle
); *src
;)
2461 *haystack
++ = *src
++;
2467 /* Compare two target format name strings.
2468 Return a value indicating how "similar" they are. */
2471 name_compare (char *first
, char *second
)
2477 copy1
= xmalloc (strlen (first
) + 1);
2478 copy2
= xmalloc (strlen (second
) + 1);
2480 /* Convert the names to lower case. */
2481 stricpy (copy1
, first
);
2482 stricpy (copy2
, second
);
2484 /* Remove size and endian strings from the name. */
2485 strcut (copy1
, "big");
2486 strcut (copy1
, "little");
2487 strcut (copy2
, "big");
2488 strcut (copy2
, "little");
2490 /* Return a value based on how many characters match,
2491 starting from the beginning. If both strings are
2492 the same then return 10 * their length. */
2493 for (result
= 0; copy1
[result
] == copy2
[result
]; result
++)
2494 if (copy1
[result
] == 0)
2506 /* Set by closest_target_match() below. */
2507 static const bfd_target
*winner
;
2509 /* Scan all the valid bfd targets looking for one that has the endianness
2510 requirement that was specified on the command line, and is the nearest
2511 match to the original output target. */
2514 closest_target_match (const bfd_target
*target
, void *data
)
2516 const bfd_target
*original
= data
;
2518 if (command_line
.endian
== ENDIAN_BIG
2519 && target
->byteorder
!= BFD_ENDIAN_BIG
)
2522 if (command_line
.endian
== ENDIAN_LITTLE
2523 && target
->byteorder
!= BFD_ENDIAN_LITTLE
)
2526 /* Must be the same flavour. */
2527 if (target
->flavour
!= original
->flavour
)
2530 /* If we have not found a potential winner yet, then record this one. */
2537 /* Oh dear, we now have two potential candidates for a successful match.
2538 Compare their names and choose the better one. */
2539 if (name_compare (target
->name
, original
->name
)
2540 > name_compare (winner
->name
, original
->name
))
2543 /* Keep on searching until wqe have checked them all. */
2547 /* Return the BFD target format of the first input file. */
2550 get_first_input_target (void)
2552 char *target
= NULL
;
2554 LANG_FOR_EACH_INPUT_STATEMENT (s
)
2556 if (s
->header
.type
== lang_input_statement_enum
2559 ldfile_open_file (s
);
2561 if (s
->the_bfd
!= NULL
2562 && bfd_check_format (s
->the_bfd
, bfd_object
))
2564 target
= bfd_get_target (s
->the_bfd
);
2576 lang_get_output_target (void)
2580 /* Has the user told us which output format to use? */
2581 if (output_target
!= NULL
)
2582 return output_target
;
2584 /* No - has the current target been set to something other than
2586 if (current_target
!= default_target
)
2587 return current_target
;
2589 /* No - can we determine the format of the first input file? */
2590 target
= get_first_input_target ();
2594 /* Failed - use the default output target. */
2595 return default_target
;
2598 /* Open the output file. */
2601 open_output (const char *name
)
2605 output_target
= lang_get_output_target ();
2607 /* Has the user requested a particular endianness on the command
2609 if (command_line
.endian
!= ENDIAN_UNSET
)
2611 const bfd_target
*target
;
2612 enum bfd_endian desired_endian
;
2614 /* Get the chosen target. */
2615 target
= bfd_search_for_target (get_target
, (void *) output_target
);
2617 /* If the target is not supported, we cannot do anything. */
2620 if (command_line
.endian
== ENDIAN_BIG
)
2621 desired_endian
= BFD_ENDIAN_BIG
;
2623 desired_endian
= BFD_ENDIAN_LITTLE
;
2625 /* See if the target has the wrong endianness. This should
2626 not happen if the linker script has provided big and
2627 little endian alternatives, but some scrips don't do
2629 if (target
->byteorder
!= desired_endian
)
2631 /* If it does, then see if the target provides
2632 an alternative with the correct endianness. */
2633 if (target
->alternative_target
!= NULL
2634 && (target
->alternative_target
->byteorder
== desired_endian
))
2635 output_target
= target
->alternative_target
->name
;
2638 /* Try to find a target as similar as possible to
2639 the default target, but which has the desired
2640 endian characteristic. */
2641 bfd_search_for_target (closest_target_match
,
2644 /* Oh dear - we could not find any targets that
2645 satisfy our requirements. */
2647 einfo (_("%P: warning: could not find any targets"
2648 " that match endianness requirement\n"));
2650 output_target
= winner
->name
;
2656 output
= bfd_openw (name
, output_target
);
2660 if (bfd_get_error () == bfd_error_invalid_target
)
2661 einfo (_("%P%F: target %s not found\n"), output_target
);
2663 einfo (_("%P%F: cannot open output file %s: %E\n"), name
);
2666 delete_output_file_on_failure
= TRUE
;
2668 if (! bfd_set_format (output
, bfd_object
))
2669 einfo (_("%P%F:%s: can not make object file: %E\n"), name
);
2670 if (! bfd_set_arch_mach (output
,
2671 ldfile_output_architecture
,
2672 ldfile_output_machine
))
2673 einfo (_("%P%F:%s: can not set architecture: %E\n"), name
);
2675 link_info
.hash
= bfd_link_hash_table_create (output
);
2676 if (link_info
.hash
== NULL
)
2677 einfo (_("%P%F: can not create hash table: %E\n"));
2679 bfd_set_gp_size (output
, g_switch_value
);
2684 ldlang_open_output (lang_statement_union_type
*statement
)
2686 switch (statement
->header
.type
)
2688 case lang_output_statement_enum
:
2689 ASSERT (output_bfd
== NULL
);
2690 output_bfd
= open_output (statement
->output_statement
.name
);
2691 ldemul_set_output_arch ();
2692 if (config
.magic_demand_paged
&& !link_info
.relocatable
)
2693 output_bfd
->flags
|= D_PAGED
;
2695 output_bfd
->flags
&= ~D_PAGED
;
2696 if (config
.text_read_only
)
2697 output_bfd
->flags
|= WP_TEXT
;
2699 output_bfd
->flags
&= ~WP_TEXT
;
2700 if (link_info
.traditional_format
)
2701 output_bfd
->flags
|= BFD_TRADITIONAL_FORMAT
;
2703 output_bfd
->flags
&= ~BFD_TRADITIONAL_FORMAT
;
2706 case lang_target_statement_enum
:
2707 current_target
= statement
->target_statement
.target
;
2714 /* Convert between addresses in bytes and sizes in octets.
2715 For currently supported targets, octets_per_byte is always a power
2716 of two, so we can use shifts. */
2717 #define TO_ADDR(X) ((X) >> opb_shift)
2718 #define TO_SIZE(X) ((X) << opb_shift)
2720 /* Support the above. */
2721 static unsigned int opb_shift
= 0;
2726 unsigned x
= bfd_arch_mach_octets_per_byte (ldfile_output_architecture
,
2727 ldfile_output_machine
);
2730 while ((x
& 1) == 0)
2738 /* Open all the input files. */
2741 open_input_bfds (lang_statement_union_type
*s
, bfd_boolean force
)
2743 for (; s
!= NULL
; s
= s
->header
.next
)
2745 switch (s
->header
.type
)
2747 case lang_constructors_statement_enum
:
2748 open_input_bfds (constructor_list
.head
, force
);
2750 case lang_output_section_statement_enum
:
2751 open_input_bfds (s
->output_section_statement
.children
.head
, force
);
2753 case lang_wild_statement_enum
:
2754 /* Maybe we should load the file's symbols. */
2755 if (s
->wild_statement
.filename
2756 && ! wildcardp (s
->wild_statement
.filename
))
2757 lookup_name (s
->wild_statement
.filename
);
2758 open_input_bfds (s
->wild_statement
.children
.head
, force
);
2760 case lang_group_statement_enum
:
2762 struct bfd_link_hash_entry
*undefs
;
2764 /* We must continually search the entries in the group
2765 until no new symbols are added to the list of undefined
2770 undefs
= link_info
.hash
->undefs_tail
;
2771 open_input_bfds (s
->group_statement
.children
.head
, TRUE
);
2773 while (undefs
!= link_info
.hash
->undefs_tail
);
2776 case lang_target_statement_enum
:
2777 current_target
= s
->target_statement
.target
;
2779 case lang_input_statement_enum
:
2780 if (s
->input_statement
.real
)
2782 lang_statement_list_type add
;
2784 s
->input_statement
.target
= current_target
;
2786 /* If we are being called from within a group, and this
2787 is an archive which has already been searched, then
2788 force it to be researched unless the whole archive
2789 has been loaded already. */
2791 && !s
->input_statement
.whole_archive
2792 && s
->input_statement
.loaded
2793 && bfd_check_format (s
->input_statement
.the_bfd
,
2795 s
->input_statement
.loaded
= FALSE
;
2797 lang_list_init (&add
);
2799 if (! load_symbols (&s
->input_statement
, &add
))
2800 config
.make_executable
= FALSE
;
2802 if (add
.head
!= NULL
)
2804 *add
.tail
= s
->header
.next
;
2805 s
->header
.next
= add
.head
;
2815 /* Add a symbol to a hash of symbols used in DEFINED (NAME) expressions. */
2818 lang_track_definedness (const char *name
)
2820 if (bfd_hash_lookup (&lang_definedness_table
, name
, TRUE
, FALSE
) == NULL
)
2821 einfo (_("%P%F: bfd_hash_lookup failed creating symbol %s\n"), name
);
2824 /* New-function for the definedness hash table. */
2826 static struct bfd_hash_entry
*
2827 lang_definedness_newfunc (struct bfd_hash_entry
*entry
,
2828 struct bfd_hash_table
*table ATTRIBUTE_UNUSED
,
2829 const char *name ATTRIBUTE_UNUSED
)
2831 struct lang_definedness_hash_entry
*ret
2832 = (struct lang_definedness_hash_entry
*) entry
;
2835 ret
= (struct lang_definedness_hash_entry
*)
2836 bfd_hash_allocate (table
, sizeof (struct lang_definedness_hash_entry
));
2839 einfo (_("%P%F: bfd_hash_allocate failed creating symbol %s\n"), name
);
2841 ret
->iteration
= -1;
2845 /* Return the iteration when the definition of NAME was last updated. A
2846 value of -1 means that the symbol is not defined in the linker script
2847 or the command line, but may be defined in the linker symbol table. */
2850 lang_symbol_definition_iteration (const char *name
)
2852 struct lang_definedness_hash_entry
*defentry
2853 = (struct lang_definedness_hash_entry
*)
2854 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2856 /* We've already created this one on the presence of DEFINED in the
2857 script, so it can't be NULL unless something is borked elsewhere in
2859 if (defentry
== NULL
)
2862 return defentry
->iteration
;
2865 /* Update the definedness state of NAME. */
2868 lang_update_definedness (const char *name
, struct bfd_link_hash_entry
*h
)
2870 struct lang_definedness_hash_entry
*defentry
2871 = (struct lang_definedness_hash_entry
*)
2872 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2874 /* We don't keep track of symbols not tested with DEFINED. */
2875 if (defentry
== NULL
)
2878 /* If the symbol was already defined, and not from an earlier statement
2879 iteration, don't update the definedness iteration, because that'd
2880 make the symbol seem defined in the linker script at this point, and
2881 it wasn't; it was defined in some object. If we do anyway, DEFINED
2882 would start to yield false before this point and the construct "sym =
2883 DEFINED (sym) ? sym : X;" would change sym to X despite being defined
2885 if (h
->type
!= bfd_link_hash_undefined
2886 && h
->type
!= bfd_link_hash_common
2887 && h
->type
!= bfd_link_hash_new
2888 && defentry
->iteration
== -1)
2891 defentry
->iteration
= lang_statement_iteration
;
2894 /* Add the supplied name to the symbol table as an undefined reference.
2895 This is a two step process as the symbol table doesn't even exist at
2896 the time the ld command line is processed. First we put the name
2897 on a list, then, once the output file has been opened, transfer the
2898 name to the symbol table. */
2900 typedef struct bfd_sym_chain ldlang_undef_chain_list_type
;
2902 #define ldlang_undef_chain_list_head entry_symbol.next
2905 ldlang_add_undef (const char *const name
)
2907 ldlang_undef_chain_list_type
*new =
2908 stat_alloc (sizeof (ldlang_undef_chain_list_type
));
2910 new->next
= ldlang_undef_chain_list_head
;
2911 ldlang_undef_chain_list_head
= new;
2913 new->name
= xstrdup (name
);
2915 if (output_bfd
!= NULL
)
2916 insert_undefined (new->name
);
2919 /* Insert NAME as undefined in the symbol table. */
2922 insert_undefined (const char *name
)
2924 struct bfd_link_hash_entry
*h
;
2926 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, FALSE
, TRUE
);
2928 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2929 if (h
->type
== bfd_link_hash_new
)
2931 h
->type
= bfd_link_hash_undefined
;
2932 h
->u
.undef
.abfd
= NULL
;
2933 bfd_link_add_undef (link_info
.hash
, h
);
2937 /* Run through the list of undefineds created above and place them
2938 into the linker hash table as undefined symbols belonging to the
2942 lang_place_undefineds (void)
2944 ldlang_undef_chain_list_type
*ptr
;
2946 for (ptr
= ldlang_undef_chain_list_head
; ptr
!= NULL
; ptr
= ptr
->next
)
2947 insert_undefined (ptr
->name
);
2950 /* Check for all readonly or some readwrite sections. */
2953 check_input_sections
2954 (lang_statement_union_type
*s
,
2955 lang_output_section_statement_type
*output_section_statement
)
2957 for (; s
!= (lang_statement_union_type
*) NULL
; s
= s
->header
.next
)
2959 switch (s
->header
.type
)
2961 case lang_wild_statement_enum
:
2962 walk_wild (&s
->wild_statement
, check_section_callback
,
2963 output_section_statement
);
2964 if (! output_section_statement
->all_input_readonly
)
2967 case lang_constructors_statement_enum
:
2968 check_input_sections (constructor_list
.head
,
2969 output_section_statement
);
2970 if (! output_section_statement
->all_input_readonly
)
2973 case lang_group_statement_enum
:
2974 check_input_sections (s
->group_statement
.children
.head
,
2975 output_section_statement
);
2976 if (! output_section_statement
->all_input_readonly
)
2985 /* Update wildcard statements if needed. */
2988 update_wild_statements (lang_statement_union_type
*s
)
2990 struct wildcard_list
*sec
;
2992 switch (sort_section
)
3002 for (; s
!= NULL
; s
= s
->header
.next
)
3004 switch (s
->header
.type
)
3009 case lang_wild_statement_enum
:
3010 sec
= s
->wild_statement
.section_list
;
3013 switch (sec
->spec
.sorted
)
3016 sec
->spec
.sorted
= sort_section
;
3019 if (sort_section
== by_alignment
)
3020 sec
->spec
.sorted
= by_name_alignment
;
3023 if (sort_section
== by_name
)
3024 sec
->spec
.sorted
= by_alignment_name
;
3032 case lang_constructors_statement_enum
:
3033 update_wild_statements (constructor_list
.head
);
3036 case lang_output_section_statement_enum
:
3037 update_wild_statements
3038 (s
->output_section_statement
.children
.head
);
3041 case lang_group_statement_enum
:
3042 update_wild_statements (s
->group_statement
.children
.head
);
3050 /* Open input files and attach to output sections. */
3053 map_input_to_output_sections
3054 (lang_statement_union_type
*s
, const char *target
,
3055 lang_output_section_statement_type
*os
)
3057 for (; s
!= NULL
; s
= s
->header
.next
)
3059 switch (s
->header
.type
)
3061 case lang_wild_statement_enum
:
3062 wild (&s
->wild_statement
, target
, os
);
3064 case lang_constructors_statement_enum
:
3065 map_input_to_output_sections (constructor_list
.head
,
3069 case lang_output_section_statement_enum
:
3070 if (s
->output_section_statement
.constraint
)
3072 if (s
->output_section_statement
.constraint
!= ONLY_IF_RW
3073 && s
->output_section_statement
.constraint
!= ONLY_IF_RO
)
3075 s
->output_section_statement
.all_input_readonly
= TRUE
;
3076 check_input_sections (s
->output_section_statement
.children
.head
,
3077 &s
->output_section_statement
);
3078 if ((s
->output_section_statement
.all_input_readonly
3079 && s
->output_section_statement
.constraint
== ONLY_IF_RW
)
3080 || (!s
->output_section_statement
.all_input_readonly
3081 && s
->output_section_statement
.constraint
== ONLY_IF_RO
))
3083 s
->output_section_statement
.constraint
= -1;
3088 map_input_to_output_sections (s
->output_section_statement
.children
.head
,
3090 &s
->output_section_statement
);
3092 case lang_output_statement_enum
:
3094 case lang_target_statement_enum
:
3095 target
= s
->target_statement
.target
;
3097 case lang_group_statement_enum
:
3098 map_input_to_output_sections (s
->group_statement
.children
.head
,
3102 case lang_data_statement_enum
:
3103 /* Make sure that any sections mentioned in the expression
3105 exp_init_os (s
->data_statement
.exp
);
3106 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3108 /* The output section gets contents, and then we inspect for
3109 any flags set in the input script which override any ALLOC. */
3110 os
->bfd_section
->flags
|= SEC_HAS_CONTENTS
;
3111 if (!(os
->flags
& SEC_NEVER_LOAD
))
3112 os
->bfd_section
->flags
|= SEC_ALLOC
| SEC_LOAD
;
3114 case lang_fill_statement_enum
:
3115 case lang_input_section_enum
:
3116 case lang_object_symbols_statement_enum
:
3117 case lang_reloc_statement_enum
:
3118 case lang_padding_statement_enum
:
3119 case lang_input_statement_enum
:
3120 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3123 case lang_assignment_statement_enum
:
3124 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3127 /* Make sure that any sections mentioned in the assignment
3129 exp_init_os (s
->assignment_statement
.exp
);
3131 case lang_afile_asection_pair_statement_enum
:
3134 case lang_address_statement_enum
:
3135 /* Mark the specified section with the supplied address.
3137 If this section was actually a segment marker, then the
3138 directive is ignored if the linker script explicitly
3139 processed the segment marker. Originally, the linker
3140 treated segment directives (like -Ttext on the
3141 command-line) as section directives. We honor the
3142 section directive semantics for backwards compatibilty;
3143 linker scripts that do not specifically check for
3144 SEGMENT_START automatically get the old semantics. */
3145 if (!s
->address_statement
.segment
3146 || !s
->address_statement
.segment
->used
)
3148 lang_output_section_statement_type
*aos
3149 = (lang_output_section_statement_lookup
3150 (s
->address_statement
.section_name
));
3152 if (aos
->bfd_section
== NULL
)
3153 init_os (aos
, NULL
);
3154 aos
->addr_tree
= s
->address_statement
.address
;
3161 /* An output section might have been removed after its statement was
3162 added. For example, ldemul_before_allocation can remove dynamic
3163 sections if they turn out to be not needed. Clean them up here. */
3166 strip_excluded_output_sections (void)
3168 lang_output_section_statement_type
*os
;
3170 /* Run lang_size_sections (if not already done). */
3171 if (expld
.phase
!= lang_mark_phase_enum
)
3173 expld
.phase
= lang_mark_phase_enum
;
3174 expld
.dataseg
.phase
= exp_dataseg_none
;
3175 one_lang_size_sections_pass (NULL
, FALSE
);
3176 lang_reset_memory_regions ();
3179 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
3183 asection
*output_section
;
3184 bfd_boolean exclude
;
3186 if (os
->constraint
== -1)
3189 output_section
= os
->bfd_section
;
3190 if (output_section
== NULL
)
3193 exclude
= (output_section
->rawsize
== 0
3194 && (output_section
->flags
& SEC_KEEP
) == 0
3195 && !bfd_section_removed_from_list (output_bfd
,
3198 /* Some sections have not yet been sized, notably .gnu.version,
3199 .dynsym, .dynstr and .hash. These all have SEC_LINKER_CREATED
3200 input sections, so don't drop output sections that have such
3201 input sections unless they are also marked SEC_EXCLUDE. */
3202 if (exclude
&& output_section
->map_head
.s
!= NULL
)
3206 for (s
= output_section
->map_head
.s
; s
!= NULL
; s
= s
->map_head
.s
)
3207 if ((s
->flags
& SEC_LINKER_CREATED
) != 0
3208 && (s
->flags
& SEC_EXCLUDE
) == 0)
3215 /* TODO: Don't just junk map_head.s, turn them into link_orders. */
3216 output_section
->map_head
.link_order
= NULL
;
3217 output_section
->map_tail
.link_order
= NULL
;
3221 /* We don't set bfd_section to NULL since bfd_section of the
3222 removed output section statement may still be used. */
3224 output_section
->flags
|= SEC_EXCLUDE
;
3225 bfd_section_list_remove (output_bfd
, output_section
);
3226 output_bfd
->section_count
--;
3230 /* Stop future calls to lang_add_section from messing with map_head
3231 and map_tail link_order fields. */
3232 stripped_excluded_sections
= TRUE
;
3236 print_output_section_statement
3237 (lang_output_section_statement_type
*output_section_statement
)
3239 asection
*section
= output_section_statement
->bfd_section
;
3242 if (output_section_statement
!= abs_output_section
)
3244 minfo ("\n%s", output_section_statement
->name
);
3246 if (section
!= NULL
)
3248 print_dot
= section
->vma
;
3250 len
= strlen (output_section_statement
->name
);
3251 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
3256 while (len
< SECTION_NAME_MAP_LENGTH
)
3262 minfo ("0x%V %W", section
->vma
, section
->size
);
3264 if (output_section_statement
->load_base
!= NULL
)
3268 addr
= exp_get_abs_int (output_section_statement
->load_base
, 0,
3270 minfo (_(" load address 0x%V"), addr
);
3277 print_statement_list (output_section_statement
->children
.head
,
3278 output_section_statement
);
3281 /* Scan for the use of the destination in the right hand side
3282 of an expression. In such cases we will not compute the
3283 correct expression, since the value of DST that is used on
3284 the right hand side will be its final value, not its value
3285 just before this expression is evaluated. */
3288 scan_for_self_assignment (const char * dst
, etree_type
* rhs
)
3290 if (rhs
== NULL
|| dst
== NULL
)
3293 switch (rhs
->type
.node_class
)
3296 return scan_for_self_assignment (dst
, rhs
->binary
.lhs
)
3297 || scan_for_self_assignment (dst
, rhs
->binary
.rhs
);
3300 return scan_for_self_assignment (dst
, rhs
->trinary
.lhs
)
3301 || scan_for_self_assignment (dst
, rhs
->trinary
.rhs
);
3304 case etree_provided
:
3306 if (strcmp (dst
, rhs
->assign
.dst
) == 0)
3308 return scan_for_self_assignment (dst
, rhs
->assign
.src
);
3311 return scan_for_self_assignment (dst
, rhs
->unary
.child
);
3315 return strcmp (dst
, rhs
->value
.str
) == 0;
3320 return strcmp (dst
, rhs
->name
.name
) == 0;
3332 print_assignment (lang_assignment_statement_type
*assignment
,
3333 lang_output_section_statement_type
*output_section
)
3337 bfd_boolean computation_is_valid
= TRUE
;
3340 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3343 if (assignment
->exp
->type
.node_class
== etree_assert
)
3346 tree
= assignment
->exp
->assert_s
.child
;
3347 computation_is_valid
= TRUE
;
3351 const char *dst
= assignment
->exp
->assign
.dst
;
3353 is_dot
= (dst
[0] == '.' && dst
[1] == 0);
3354 tree
= assignment
->exp
->assign
.src
;
3355 computation_is_valid
= is_dot
|| (scan_for_self_assignment (dst
, tree
) == FALSE
);
3358 exp_fold_tree (tree
, output_section
->bfd_section
, &print_dot
);
3359 if (expld
.result
.valid_p
)
3363 if (computation_is_valid
)
3365 value
= expld
.result
.value
;
3367 if (expld
.result
.section
)
3368 value
+= expld
.result
.section
->vma
;
3370 minfo ("0x%V", value
);
3376 struct bfd_link_hash_entry
*h
;
3378 h
= bfd_link_hash_lookup (link_info
.hash
, assignment
->exp
->assign
.dst
,
3379 FALSE
, FALSE
, TRUE
);
3382 value
= h
->u
.def
.value
;
3384 if (expld
.result
.section
)
3385 value
+= expld
.result
.section
->vma
;
3387 minfo ("[0x%V]", value
);
3390 minfo ("[unresolved]");
3402 exp_print_tree (assignment
->exp
);
3407 print_input_statement (lang_input_statement_type
*statm
)
3409 if (statm
->filename
!= NULL
)
3411 fprintf (config
.map_file
, "LOAD %s\n", statm
->filename
);
3415 /* Print all symbols defined in a particular section. This is called
3416 via bfd_link_hash_traverse, or by print_all_symbols. */
3419 print_one_symbol (struct bfd_link_hash_entry
*hash_entry
, void *ptr
)
3421 asection
*sec
= ptr
;
3423 if ((hash_entry
->type
== bfd_link_hash_defined
3424 || hash_entry
->type
== bfd_link_hash_defweak
)
3425 && sec
== hash_entry
->u
.def
.section
)
3429 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3432 (hash_entry
->u
.def
.value
3433 + hash_entry
->u
.def
.section
->output_offset
3434 + hash_entry
->u
.def
.section
->output_section
->vma
));
3436 minfo (" %T\n", hash_entry
->root
.string
);
3443 print_all_symbols (sec
)
3446 struct fat_user_section_struct
*ud
= get_userdata (sec
);
3447 struct map_symbol_def
*def
;
3452 *ud
->map_symbol_def_tail
= 0;
3453 for (def
= ud
->map_symbol_def_head
; def
; def
= def
->next
)
3454 print_one_symbol (def
->entry
, sec
);
3457 /* Print information about an input section to the map file. */
3460 print_input_section (lang_input_section_type
*in
)
3462 asection
*i
= in
->section
;
3463 bfd_size_type size
= i
->size
;
3472 minfo ("%s", i
->name
);
3474 len
= 1 + strlen (i
->name
);
3475 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
3480 while (len
< SECTION_NAME_MAP_LENGTH
)
3486 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3487 addr
= i
->output_section
->vma
+ i
->output_offset
;
3494 minfo ("0x%V %W %B\n", addr
, TO_ADDR (size
), i
->owner
);
3496 if (size
!= i
->rawsize
&& i
->rawsize
!= 0)
3498 len
= SECTION_NAME_MAP_LENGTH
+ 3;
3510 minfo (_("%W (size before relaxing)\n"), i
->rawsize
);
3513 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3515 if (command_line
.reduce_memory_overheads
)
3516 bfd_link_hash_traverse (link_info
.hash
, print_one_symbol
, i
);
3518 print_all_symbols (i
);
3520 print_dot
= addr
+ TO_ADDR (size
);
3526 print_fill_statement (lang_fill_statement_type
*fill
)
3530 fputs (" FILL mask 0x", config
.map_file
);
3531 for (p
= fill
->fill
->data
, size
= fill
->fill
->size
; size
!= 0; p
++, size
--)
3532 fprintf (config
.map_file
, "%02x", *p
);
3533 fputs ("\n", config
.map_file
);
3537 print_data_statement (lang_data_statement_type
*data
)
3545 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3548 addr
= data
->output_offset
;
3549 if (data
->output_section
!= NULL
)
3550 addr
+= data
->output_section
->vma
;
3578 minfo ("0x%V %W %s 0x%v", addr
, size
, name
, data
->value
);
3580 if (data
->exp
->type
.node_class
!= etree_value
)
3583 exp_print_tree (data
->exp
);
3588 print_dot
= addr
+ TO_ADDR (size
);
3591 /* Print an address statement. These are generated by options like
3595 print_address_statement (lang_address_statement_type
*address
)
3597 minfo (_("Address of section %s set to "), address
->section_name
);
3598 exp_print_tree (address
->address
);
3602 /* Print a reloc statement. */
3605 print_reloc_statement (lang_reloc_statement_type
*reloc
)
3612 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3615 addr
= reloc
->output_offset
;
3616 if (reloc
->output_section
!= NULL
)
3617 addr
+= reloc
->output_section
->vma
;
3619 size
= bfd_get_reloc_size (reloc
->howto
);
3621 minfo ("0x%V %W RELOC %s ", addr
, size
, reloc
->howto
->name
);
3623 if (reloc
->name
!= NULL
)
3624 minfo ("%s+", reloc
->name
);
3626 minfo ("%s+", reloc
->section
->name
);
3628 exp_print_tree (reloc
->addend_exp
);
3632 print_dot
= addr
+ TO_ADDR (size
);
3636 print_padding_statement (lang_padding_statement_type
*s
)
3644 len
= sizeof " *fill*" - 1;
3645 while (len
< SECTION_NAME_MAP_LENGTH
)
3651 addr
= s
->output_offset
;
3652 if (s
->output_section
!= NULL
)
3653 addr
+= s
->output_section
->vma
;
3654 minfo ("0x%V %W ", addr
, (bfd_vma
) s
->size
);
3656 if (s
->fill
->size
!= 0)
3660 for (p
= s
->fill
->data
, size
= s
->fill
->size
; size
!= 0; p
++, size
--)
3661 fprintf (config
.map_file
, "%02x", *p
);
3666 print_dot
= addr
+ TO_ADDR (s
->size
);
3670 print_wild_statement (lang_wild_statement_type
*w
,
3671 lang_output_section_statement_type
*os
)
3673 struct wildcard_list
*sec
;
3677 if (w
->filenames_sorted
)
3679 if (w
->filename
!= NULL
)
3680 minfo ("%s", w
->filename
);
3683 if (w
->filenames_sorted
)
3687 for (sec
= w
->section_list
; sec
; sec
= sec
->next
)
3689 if (sec
->spec
.sorted
)
3691 if (sec
->spec
.exclude_name_list
!= NULL
)
3694 minfo ("EXCLUDE_FILE(%s", sec
->spec
.exclude_name_list
->name
);
3695 for (tmp
= sec
->spec
.exclude_name_list
->next
; tmp
; tmp
= tmp
->next
)
3696 minfo (" %s", tmp
->name
);
3699 if (sec
->spec
.name
!= NULL
)
3700 minfo ("%s", sec
->spec
.name
);
3703 if (sec
->spec
.sorted
)
3712 print_statement_list (w
->children
.head
, os
);
3715 /* Print a group statement. */
3718 print_group (lang_group_statement_type
*s
,
3719 lang_output_section_statement_type
*os
)
3721 fprintf (config
.map_file
, "START GROUP\n");
3722 print_statement_list (s
->children
.head
, os
);
3723 fprintf (config
.map_file
, "END GROUP\n");
3726 /* Print the list of statements in S.
3727 This can be called for any statement type. */
3730 print_statement_list (lang_statement_union_type
*s
,
3731 lang_output_section_statement_type
*os
)
3735 print_statement (s
, os
);
3740 /* Print the first statement in statement list S.
3741 This can be called for any statement type. */
3744 print_statement (lang_statement_union_type
*s
,
3745 lang_output_section_statement_type
*os
)
3747 switch (s
->header
.type
)
3750 fprintf (config
.map_file
, _("Fail with %d\n"), s
->header
.type
);
3753 case lang_constructors_statement_enum
:
3754 if (constructor_list
.head
!= NULL
)
3756 if (constructors_sorted
)
3757 minfo (" SORT (CONSTRUCTORS)\n");
3759 minfo (" CONSTRUCTORS\n");
3760 print_statement_list (constructor_list
.head
, os
);
3763 case lang_wild_statement_enum
:
3764 print_wild_statement (&s
->wild_statement
, os
);
3766 case lang_address_statement_enum
:
3767 print_address_statement (&s
->address_statement
);
3769 case lang_object_symbols_statement_enum
:
3770 minfo (" CREATE_OBJECT_SYMBOLS\n");
3772 case lang_fill_statement_enum
:
3773 print_fill_statement (&s
->fill_statement
);
3775 case lang_data_statement_enum
:
3776 print_data_statement (&s
->data_statement
);
3778 case lang_reloc_statement_enum
:
3779 print_reloc_statement (&s
->reloc_statement
);
3781 case lang_input_section_enum
:
3782 print_input_section (&s
->input_section
);
3784 case lang_padding_statement_enum
:
3785 print_padding_statement (&s
->padding_statement
);
3787 case lang_output_section_statement_enum
:
3788 print_output_section_statement (&s
->output_section_statement
);
3790 case lang_assignment_statement_enum
:
3791 print_assignment (&s
->assignment_statement
, os
);
3793 case lang_target_statement_enum
:
3794 fprintf (config
.map_file
, "TARGET(%s)\n", s
->target_statement
.target
);
3796 case lang_output_statement_enum
:
3797 minfo ("OUTPUT(%s", s
->output_statement
.name
);
3798 if (output_target
!= NULL
)
3799 minfo (" %s", output_target
);
3802 case lang_input_statement_enum
:
3803 print_input_statement (&s
->input_statement
);
3805 case lang_group_statement_enum
:
3806 print_group (&s
->group_statement
, os
);
3808 case lang_afile_asection_pair_statement_enum
:
3815 print_statements (void)
3817 print_statement_list (statement_list
.head
, abs_output_section
);
3820 /* Print the first N statements in statement list S to STDERR.
3821 If N == 0, nothing is printed.
3822 If N < 0, the entire list is printed.
3823 Intended to be called from GDB. */
3826 dprint_statement (lang_statement_union_type
*s
, int n
)
3828 FILE *map_save
= config
.map_file
;
3830 config
.map_file
= stderr
;
3833 print_statement_list (s
, abs_output_section
);
3836 while (s
&& --n
>= 0)
3838 print_statement (s
, abs_output_section
);
3843 config
.map_file
= map_save
;
3847 insert_pad (lang_statement_union_type
**ptr
,
3849 unsigned int alignment_needed
,
3850 asection
*output_section
,
3853 static fill_type zero_fill
= { 1, { 0 } };
3854 lang_statement_union_type
*pad
= NULL
;
3856 if (ptr
!= &statement_list
.head
)
3857 pad
= ((lang_statement_union_type
*)
3858 ((char *) ptr
- offsetof (lang_statement_union_type
, header
.next
)));
3860 && pad
->header
.type
== lang_padding_statement_enum
3861 && pad
->padding_statement
.output_section
== output_section
)
3863 /* Use the existing pad statement. */
3865 else if ((pad
= *ptr
) != NULL
3866 && pad
->header
.type
== lang_padding_statement_enum
3867 && pad
->padding_statement
.output_section
== output_section
)
3869 /* Use the existing pad statement. */
3873 /* Make a new padding statement, linked into existing chain. */
3874 pad
= stat_alloc (sizeof (lang_padding_statement_type
));
3875 pad
->header
.next
= *ptr
;
3877 pad
->header
.type
= lang_padding_statement_enum
;
3878 pad
->padding_statement
.output_section
= output_section
;
3881 pad
->padding_statement
.fill
= fill
;
3883 pad
->padding_statement
.output_offset
= dot
- output_section
->vma
;
3884 pad
->padding_statement
.size
= alignment_needed
;
3885 output_section
->size
+= alignment_needed
;
3888 /* Work out how much this section will move the dot point. */
3892 (lang_statement_union_type
**this_ptr
,
3893 lang_output_section_statement_type
*output_section_statement
,
3897 lang_input_section_type
*is
= &((*this_ptr
)->input_section
);
3898 asection
*i
= is
->section
;
3900 if (!((lang_input_statement_type
*) i
->owner
->usrdata
)->just_syms_flag
3901 && (i
->flags
& SEC_EXCLUDE
) == 0)
3903 unsigned int alignment_needed
;
3906 /* Align this section first to the input sections requirement,
3907 then to the output section's requirement. If this alignment
3908 is greater than any seen before, then record it too. Perform
3909 the alignment by inserting a magic 'padding' statement. */
3911 if (output_section_statement
->subsection_alignment
!= -1)
3912 i
->alignment_power
= output_section_statement
->subsection_alignment
;
3914 o
= output_section_statement
->bfd_section
;
3915 if (o
->alignment_power
< i
->alignment_power
)
3916 o
->alignment_power
= i
->alignment_power
;
3918 alignment_needed
= align_power (dot
, i
->alignment_power
) - dot
;
3920 if (alignment_needed
!= 0)
3922 insert_pad (this_ptr
, fill
, TO_SIZE (alignment_needed
), o
, dot
);
3923 dot
+= alignment_needed
;
3926 /* Remember where in the output section this input section goes. */
3928 i
->output_offset
= dot
- o
->vma
;
3930 /* Mark how big the output section must be to contain this now. */
3931 dot
+= TO_ADDR (i
->size
);
3932 o
->size
= TO_SIZE (dot
- o
->vma
);
3936 i
->output_offset
= i
->vma
- output_section_statement
->bfd_section
->vma
;
3943 sort_sections_by_lma (const void *arg1
, const void *arg2
)
3945 const asection
*sec1
= *(const asection
**) arg1
;
3946 const asection
*sec2
= *(const asection
**) arg2
;
3948 if (bfd_section_lma (sec1
->owner
, sec1
)
3949 < bfd_section_lma (sec2
->owner
, sec2
))
3951 else if (bfd_section_lma (sec1
->owner
, sec1
)
3952 > bfd_section_lma (sec2
->owner
, sec2
))
3958 #define IGNORE_SECTION(s) \
3959 ((s->flags & SEC_NEVER_LOAD) != 0 \
3960 || (s->flags & SEC_ALLOC) == 0 \
3961 || ((s->flags & SEC_THREAD_LOCAL) != 0 \
3962 && (s->flags & SEC_LOAD) == 0))
3964 /* Check to see if any allocated sections overlap with other allocated
3965 sections. This can happen if a linker script specifies the output
3966 section addresses of the two sections. */
3969 lang_check_section_addresses (void)
3972 asection
**sections
, **spp
;
3980 if (bfd_count_sections (output_bfd
) <= 1)
3983 amt
= bfd_count_sections (output_bfd
) * sizeof (asection
*);
3984 sections
= xmalloc (amt
);
3986 /* Scan all sections in the output list. */
3988 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
3990 /* Only consider loadable sections with real contents. */
3991 if (IGNORE_SECTION (s
) || s
->size
== 0)
3994 sections
[count
] = s
;
4001 qsort (sections
, (size_t) count
, sizeof (asection
*),
4002 sort_sections_by_lma
);
4006 s_start
= bfd_section_lma (output_bfd
, s
);
4007 s_end
= s_start
+ TO_ADDR (s
->size
) - 1;
4008 for (count
--; count
; count
--)
4010 /* We must check the sections' LMA addresses not their VMA
4011 addresses because overlay sections can have overlapping VMAs
4012 but they must have distinct LMAs. */
4017 s_start
= bfd_section_lma (output_bfd
, s
);
4018 s_end
= s_start
+ TO_ADDR (s
->size
) - 1;
4020 /* Look for an overlap. */
4021 if (s_end
>= os_start
&& s_start
<= os_end
)
4022 einfo (_("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
4023 s
->name
, s_start
, s_end
, os
->name
, os_start
, os_end
);
4029 /* Make sure the new address is within the region. We explicitly permit the
4030 current address to be at the exact end of the region when the address is
4031 non-zero, in case the region is at the end of addressable memory and the
4032 calculation wraps around. */
4035 os_region_check (lang_output_section_statement_type
*os
,
4036 lang_memory_region_type
*region
,
4040 if ((region
->current
< region
->origin
4041 || (region
->current
- region
->origin
> region
->length
))
4042 && ((region
->current
!= region
->origin
+ region
->length
)
4047 einfo (_("%X%P: address 0x%v of %B section %s"
4048 " is not within region %s\n"),
4050 os
->bfd_section
->owner
,
4051 os
->bfd_section
->name
,
4056 einfo (_("%X%P: region %s is full (%B section %s)\n"),
4058 os
->bfd_section
->owner
,
4059 os
->bfd_section
->name
);
4061 /* Reset the region pointer. */
4062 region
->current
= region
->origin
;
4066 /* Set the sizes for all the output sections. */
4069 lang_size_sections_1
4070 (lang_statement_union_type
*s
,
4071 lang_output_section_statement_type
*output_section_statement
,
4072 lang_statement_union_type
**prev
,
4076 bfd_boolean check_regions
)
4078 /* Size up the sections from their constituent parts. */
4079 for (; s
!= NULL
; s
= s
->header
.next
)
4081 switch (s
->header
.type
)
4083 case lang_output_section_statement_enum
:
4085 bfd_vma newdot
, after
;
4086 lang_output_section_statement_type
*os
;
4088 os
= &s
->output_section_statement
;
4089 if (os
->addr_tree
!= NULL
)
4091 os
->processed
= FALSE
;
4092 exp_fold_tree (os
->addr_tree
, bfd_abs_section_ptr
, &dot
);
4094 if (!expld
.result
.valid_p
4095 && expld
.phase
!= lang_mark_phase_enum
)
4096 einfo (_("%F%S: non constant or forward reference"
4097 " address expression for section %s\n"),
4100 dot
= expld
.result
.value
+ expld
.result
.section
->vma
;
4103 if (os
->bfd_section
== NULL
)
4104 /* This section was removed or never actually created. */
4107 /* If this is a COFF shared library section, use the size and
4108 address from the input section. FIXME: This is COFF
4109 specific; it would be cleaner if there were some other way
4110 to do this, but nothing simple comes to mind. */
4111 if ((bfd_get_flavour (output_bfd
) == bfd_target_ecoff_flavour
4112 || bfd_get_flavour (output_bfd
) == bfd_target_coff_flavour
)
4113 && (os
->bfd_section
->flags
& SEC_COFF_SHARED_LIBRARY
) != 0)
4117 if (os
->children
.head
== NULL
4118 || os
->children
.head
->header
.next
!= NULL
4119 || (os
->children
.head
->header
.type
4120 != lang_input_section_enum
))
4121 einfo (_("%P%X: Internal error on COFF shared library"
4122 " section %s\n"), os
->name
);
4124 input
= os
->children
.head
->input_section
.section
;
4125 bfd_set_section_vma (os
->bfd_section
->owner
,
4127 bfd_section_vma (input
->owner
, input
));
4128 os
->bfd_section
->size
= input
->size
;
4133 if (bfd_is_abs_section (os
->bfd_section
))
4135 /* No matter what happens, an abs section starts at zero. */
4136 ASSERT (os
->bfd_section
->vma
== 0);
4142 if (os
->addr_tree
== NULL
)
4144 /* No address specified for this section, get one
4145 from the region specification. */
4146 if (os
->region
== NULL
4147 || ((os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))
4148 && os
->region
->name
[0] == '*'
4149 && strcmp (os
->region
->name
,
4150 DEFAULT_MEMORY_REGION
) == 0))
4152 os
->region
= lang_memory_default (os
->bfd_section
);
4155 /* If a loadable section is using the default memory
4156 region, and some non default memory regions were
4157 defined, issue an error message. */
4158 if (!IGNORE_SECTION (os
->bfd_section
)
4159 && ! link_info
.relocatable
4161 && strcmp (os
->region
->name
,
4162 DEFAULT_MEMORY_REGION
) == 0
4163 && lang_memory_region_list
!= NULL
4164 && (strcmp (lang_memory_region_list
->name
,
4165 DEFAULT_MEMORY_REGION
) != 0
4166 || lang_memory_region_list
->next
!= NULL
)
4167 && expld
.phase
!= lang_mark_phase_enum
)
4169 /* By default this is an error rather than just a
4170 warning because if we allocate the section to the
4171 default memory region we can end up creating an
4172 excessively large binary, or even seg faulting when
4173 attempting to perform a negative seek. See
4174 sources.redhat.com/ml/binutils/2003-04/msg00423.html
4175 for an example of this. This behaviour can be
4176 overridden by the using the --no-check-sections
4178 if (command_line
.check_section_addresses
)
4179 einfo (_("%P%F: error: no memory region specified"
4180 " for loadable section `%s'\n"),
4181 bfd_get_section_name (output_bfd
,
4184 einfo (_("%P: warning: no memory region specified"
4185 " for loadable section `%s'\n"),
4186 bfd_get_section_name (output_bfd
,
4190 newdot
= os
->region
->current
;
4191 align
= os
->bfd_section
->alignment_power
;
4194 align
= os
->section_alignment
;
4196 /* Align to what the section needs. */
4199 bfd_vma savedot
= newdot
;
4200 newdot
= align_power (newdot
, align
);
4202 if (newdot
!= savedot
4203 && (config
.warn_section_align
4204 || os
->addr_tree
!= NULL
)
4205 && expld
.phase
!= lang_mark_phase_enum
)
4206 einfo (_("%P: warning: changing start of section"
4207 " %s by %lu bytes\n"),
4208 os
->name
, (unsigned long) (newdot
- savedot
));
4211 bfd_set_section_vma (0, os
->bfd_section
, newdot
);
4213 os
->bfd_section
->output_offset
= 0;
4216 lang_size_sections_1 (os
->children
.head
, os
, &os
->children
.head
,
4217 os
->fill
, newdot
, relax
, check_regions
);
4219 os
->processed
= TRUE
;
4221 if (bfd_is_abs_section (os
->bfd_section
) || os
->ignored
)
4223 ASSERT (os
->bfd_section
->size
== 0);
4227 dot
= os
->bfd_section
->vma
;
4229 /* Put the section within the requested block size, or
4230 align at the block boundary. */
4232 + TO_ADDR (os
->bfd_section
->size
)
4233 + os
->block_value
- 1)
4234 & - (bfd_vma
) os
->block_value
);
4236 os
->bfd_section
->size
= TO_SIZE (after
- os
->bfd_section
->vma
);
4238 /* .tbss sections effectively have zero size. */
4239 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
4240 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
4241 || link_info
.relocatable
)
4242 dot
+= TO_ADDR (os
->bfd_section
->size
);
4244 if (os
->update_dot_tree
!= 0)
4245 exp_fold_tree (os
->update_dot_tree
, bfd_abs_section_ptr
, &dot
);
4247 /* Update dot in the region ?
4248 We only do this if the section is going to be allocated,
4249 since unallocated sections do not contribute to the region's
4250 overall size in memory.
4252 If the SEC_NEVER_LOAD bit is not set, it will affect the
4253 addresses of sections after it. We have to update
4255 if (os
->region
!= NULL
4256 && ((os
->bfd_section
->flags
& SEC_NEVER_LOAD
) == 0
4257 || (os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))))
4259 os
->region
->current
= dot
;
4262 /* Make sure the new address is within the region. */
4263 os_region_check (os
, os
->region
, os
->addr_tree
,
4264 os
->bfd_section
->vma
);
4266 /* If there's no load address specified, use the run
4267 region as the load region. */
4268 if (os
->lma_region
== NULL
&& os
->load_base
== NULL
)
4269 os
->lma_region
= os
->region
;
4271 if (os
->lma_region
!= NULL
&& os
->lma_region
!= os
->region
)
4273 /* Set load_base, which will be handled later. */
4274 os
->load_base
= exp_intop (os
->lma_region
->current
);
4275 os
->lma_region
->current
+=
4276 TO_ADDR (os
->bfd_section
->size
);
4278 os_region_check (os
, os
->lma_region
, NULL
,
4279 os
->bfd_section
->lma
);
4285 case lang_constructors_statement_enum
:
4286 dot
= lang_size_sections_1 (constructor_list
.head
,
4287 output_section_statement
,
4288 &s
->wild_statement
.children
.head
,
4289 fill
, dot
, relax
, check_regions
);
4292 case lang_data_statement_enum
:
4294 unsigned int size
= 0;
4296 s
->data_statement
.output_offset
=
4297 dot
- output_section_statement
->bfd_section
->vma
;
4298 s
->data_statement
.output_section
=
4299 output_section_statement
->bfd_section
;
4301 /* We might refer to provided symbols in the expression, and
4302 need to mark them as needed. */
4303 exp_fold_tree (s
->data_statement
.exp
, bfd_abs_section_ptr
, &dot
);
4305 switch (s
->data_statement
.type
)
4323 if (size
< TO_SIZE ((unsigned) 1))
4324 size
= TO_SIZE ((unsigned) 1);
4325 dot
+= TO_ADDR (size
);
4326 output_section_statement
->bfd_section
->size
+= size
;
4330 case lang_reloc_statement_enum
:
4334 s
->reloc_statement
.output_offset
=
4335 dot
- output_section_statement
->bfd_section
->vma
;
4336 s
->reloc_statement
.output_section
=
4337 output_section_statement
->bfd_section
;
4338 size
= bfd_get_reloc_size (s
->reloc_statement
.howto
);
4339 dot
+= TO_ADDR (size
);
4340 output_section_statement
->bfd_section
->size
+= size
;
4344 case lang_wild_statement_enum
:
4345 dot
= lang_size_sections_1 (s
->wild_statement
.children
.head
,
4346 output_section_statement
,
4347 &s
->wild_statement
.children
.head
,
4348 fill
, dot
, relax
, check_regions
);
4351 case lang_object_symbols_statement_enum
:
4352 link_info
.create_object_symbols_section
=
4353 output_section_statement
->bfd_section
;
4356 case lang_output_statement_enum
:
4357 case lang_target_statement_enum
:
4360 case lang_input_section_enum
:
4364 i
= (*prev
)->input_section
.section
;
4369 if (! bfd_relax_section (i
->owner
, i
, &link_info
, &again
))
4370 einfo (_("%P%F: can't relax section: %E\n"));
4374 dot
= size_input_section (prev
, output_section_statement
,
4375 output_section_statement
->fill
, dot
);
4379 case lang_input_statement_enum
:
4382 case lang_fill_statement_enum
:
4383 s
->fill_statement
.output_section
=
4384 output_section_statement
->bfd_section
;
4386 fill
= s
->fill_statement
.fill
;
4389 case lang_assignment_statement_enum
:
4391 bfd_vma newdot
= dot
;
4393 exp_fold_tree (s
->assignment_statement
.exp
,
4394 output_section_statement
->bfd_section
,
4397 if (newdot
!= dot
&& !output_section_statement
->ignored
)
4399 if (output_section_statement
== abs_output_section
)
4401 /* If we don't have an output section, then just adjust
4402 the default memory address. */
4403 lang_memory_region_lookup (DEFAULT_MEMORY_REGION
,
4404 FALSE
)->current
= newdot
;
4408 /* Insert a pad after this statement. We can't
4409 put the pad before when relaxing, in case the
4410 assignment references dot. */
4411 insert_pad (&s
->header
.next
, fill
, TO_SIZE (newdot
- dot
),
4412 output_section_statement
->bfd_section
, dot
);
4414 /* Don't neuter the pad below when relaxing. */
4417 /* If dot is advanced, this implies that the section
4418 should have space allocated to it, unless the
4419 user has explicitly stated that the section
4420 should never be loaded. */
4421 if (!(output_section_statement
->flags
4422 & (SEC_NEVER_LOAD
| SEC_ALLOC
)))
4423 output_section_statement
->bfd_section
->flags
|= SEC_ALLOC
;
4430 case lang_padding_statement_enum
:
4431 /* If this is the first time lang_size_sections is called,
4432 we won't have any padding statements. If this is the
4433 second or later passes when relaxing, we should allow
4434 padding to shrink. If padding is needed on this pass, it
4435 will be added back in. */
4436 s
->padding_statement
.size
= 0;
4438 /* Make sure output_offset is valid. If relaxation shrinks
4439 the section and this pad isn't needed, it's possible to
4440 have output_offset larger than the final size of the
4441 section. bfd_set_section_contents will complain even for
4442 a pad size of zero. */
4443 s
->padding_statement
.output_offset
4444 = dot
- output_section_statement
->bfd_section
->vma
;
4447 case lang_group_statement_enum
:
4448 dot
= lang_size_sections_1 (s
->group_statement
.children
.head
,
4449 output_section_statement
,
4450 &s
->group_statement
.children
.head
,
4451 fill
, dot
, relax
, check_regions
);
4458 /* We can only get here when relaxing is turned on. */
4459 case lang_address_statement_enum
:
4462 prev
= &s
->header
.next
;
4468 one_lang_size_sections_pass (bfd_boolean
*relax
, bfd_boolean check_regions
)
4470 lang_statement_iteration
++;
4471 lang_size_sections_1 (statement_list
.head
, abs_output_section
,
4472 &statement_list
.head
, 0, 0, relax
, check_regions
);
4476 lang_size_sections (bfd_boolean
*relax
, bfd_boolean check_regions
)
4478 expld
.phase
= lang_allocating_phase_enum
;
4479 expld
.dataseg
.phase
= exp_dataseg_none
;
4481 one_lang_size_sections_pass (relax
, check_regions
);
4482 if (expld
.dataseg
.phase
== exp_dataseg_end_seen
4483 && link_info
.relro
&& expld
.dataseg
.relro_end
)
4485 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END pair was seen, try
4486 to put expld.dataseg.relro on a (common) page boundary. */
4487 bfd_vma old_min_base
, relro_end
, maxpage
;
4489 expld
.dataseg
.phase
= exp_dataseg_relro_adjust
;
4490 old_min_base
= expld
.dataseg
.min_base
;
4491 maxpage
= expld
.dataseg
.maxpagesize
;
4492 expld
.dataseg
.base
+= (-expld
.dataseg
.relro_end
4493 & (expld
.dataseg
.pagesize
- 1));
4494 /* Compute the expected PT_GNU_RELRO segment end. */
4495 relro_end
= (expld
.dataseg
.relro_end
+ expld
.dataseg
.pagesize
- 1)
4496 & ~(expld
.dataseg
.pagesize
- 1);
4497 if (old_min_base
+ maxpage
< expld
.dataseg
.base
)
4499 expld
.dataseg
.base
-= maxpage
;
4500 relro_end
-= maxpage
;
4502 one_lang_size_sections_pass (relax
, check_regions
);
4503 if (expld
.dataseg
.relro_end
> relro_end
)
4505 /* The alignment of sections between DATA_SEGMENT_ALIGN
4506 and DATA_SEGMENT_RELRO_END caused huge padding to be
4507 inserted at DATA_SEGMENT_RELRO_END. Try some other base. */
4509 unsigned int max_alignment_power
= 0;
4511 /* Find maximum alignment power of sections between
4512 DATA_SEGMENT_ALIGN and DATA_SEGMENT_RELRO_END. */
4513 for (sec
= output_bfd
->sections
; sec
; sec
= sec
->next
)
4514 if (sec
->vma
>= expld
.dataseg
.base
4515 && sec
->vma
< expld
.dataseg
.relro_end
4516 && sec
->alignment_power
> max_alignment_power
)
4517 max_alignment_power
= sec
->alignment_power
;
4519 if (((bfd_vma
) 1 << max_alignment_power
) < expld
.dataseg
.pagesize
)
4521 if (expld
.dataseg
.base
- (1 << max_alignment_power
)
4523 expld
.dataseg
.base
+= expld
.dataseg
.pagesize
;
4524 expld
.dataseg
.base
-= (1 << max_alignment_power
);
4525 one_lang_size_sections_pass (relax
, check_regions
);
4528 link_info
.relro_start
= expld
.dataseg
.base
;
4529 link_info
.relro_end
= expld
.dataseg
.relro_end
;
4531 else if (expld
.dataseg
.phase
== exp_dataseg_end_seen
)
4533 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether
4534 a page could be saved in the data segment. */
4535 bfd_vma first
, last
;
4537 first
= -expld
.dataseg
.base
& (expld
.dataseg
.pagesize
- 1);
4538 last
= expld
.dataseg
.end
& (expld
.dataseg
.pagesize
- 1);
4540 && ((expld
.dataseg
.base
& ~(expld
.dataseg
.pagesize
- 1))
4541 != (expld
.dataseg
.end
& ~(expld
.dataseg
.pagesize
- 1)))
4542 && first
+ last
<= expld
.dataseg
.pagesize
)
4544 expld
.dataseg
.phase
= exp_dataseg_adjust
;
4545 one_lang_size_sections_pass (relax
, check_regions
);
4549 expld
.phase
= lang_final_phase_enum
;
4552 /* Worker function for lang_do_assignments. Recursiveness goes here. */
4555 lang_do_assignments_1
4556 (lang_statement_union_type
*s
,
4557 lang_output_section_statement_type
*output_section_statement
,
4561 for (; s
!= NULL
; s
= s
->header
.next
)
4563 switch (s
->header
.type
)
4565 case lang_constructors_statement_enum
:
4566 dot
= lang_do_assignments_1 (constructor_list
.head
,
4567 output_section_statement
,
4572 case lang_output_section_statement_enum
:
4574 lang_output_section_statement_type
*os
;
4576 os
= &(s
->output_section_statement
);
4577 if (os
->bfd_section
!= NULL
&& !os
->ignored
)
4579 dot
= os
->bfd_section
->vma
;
4580 lang_do_assignments_1 (os
->children
.head
, os
, os
->fill
, dot
);
4581 /* .tbss sections effectively have zero size. */
4582 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
4583 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
4584 || link_info
.relocatable
)
4585 dot
+= TO_ADDR (os
->bfd_section
->size
);
4589 /* If nothing has been placed into the output section then
4590 it won't have a bfd_section. */
4591 if (os
->bfd_section
&& !os
->ignored
)
4593 os
->bfd_section
->lma
4594 = exp_get_abs_int (os
->load_base
, 0, "load base");
4600 case lang_wild_statement_enum
:
4602 dot
= lang_do_assignments_1 (s
->wild_statement
.children
.head
,
4603 output_section_statement
,
4607 case lang_object_symbols_statement_enum
:
4608 case lang_output_statement_enum
:
4609 case lang_target_statement_enum
:
4612 case lang_data_statement_enum
:
4613 exp_fold_tree (s
->data_statement
.exp
, bfd_abs_section_ptr
, &dot
);
4614 if (expld
.result
.valid_p
)
4615 s
->data_statement
.value
= (expld
.result
.value
4616 + expld
.result
.section
->vma
);
4618 einfo (_("%F%P: invalid data statement\n"));
4621 switch (s
->data_statement
.type
)
4639 if (size
< TO_SIZE ((unsigned) 1))
4640 size
= TO_SIZE ((unsigned) 1);
4641 dot
+= TO_ADDR (size
);
4645 case lang_reloc_statement_enum
:
4646 exp_fold_tree (s
->reloc_statement
.addend_exp
,
4647 bfd_abs_section_ptr
, &dot
);
4648 if (expld
.result
.valid_p
)
4649 s
->reloc_statement
.addend_value
= expld
.result
.value
;
4651 einfo (_("%F%P: invalid reloc statement\n"));
4652 dot
+= TO_ADDR (bfd_get_reloc_size (s
->reloc_statement
.howto
));
4655 case lang_input_section_enum
:
4657 asection
*in
= s
->input_section
.section
;
4659 if ((in
->flags
& SEC_EXCLUDE
) == 0)
4660 dot
+= TO_ADDR (in
->size
);
4664 case lang_input_statement_enum
:
4667 case lang_fill_statement_enum
:
4668 fill
= s
->fill_statement
.fill
;
4671 case lang_assignment_statement_enum
:
4672 exp_fold_tree (s
->assignment_statement
.exp
,
4673 output_section_statement
->bfd_section
,
4677 case lang_padding_statement_enum
:
4678 dot
+= TO_ADDR (s
->padding_statement
.size
);
4681 case lang_group_statement_enum
:
4682 dot
= lang_do_assignments_1 (s
->group_statement
.children
.head
,
4683 output_section_statement
,
4691 case lang_address_statement_enum
:
4699 lang_do_assignments (void)
4701 lang_statement_iteration
++;
4702 lang_do_assignments_1 (statement_list
.head
, abs_output_section
, NULL
, 0);
4705 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
4706 operator .startof. (section_name), it produces an undefined symbol
4707 .startof.section_name. Similarly, when it sees
4708 .sizeof. (section_name), it produces an undefined symbol
4709 .sizeof.section_name. For all the output sections, we look for
4710 such symbols, and set them to the correct value. */
4713 lang_set_startof (void)
4717 if (link_info
.relocatable
)
4720 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
4722 const char *secname
;
4724 struct bfd_link_hash_entry
*h
;
4726 secname
= bfd_get_section_name (output_bfd
, s
);
4727 buf
= xmalloc (10 + strlen (secname
));
4729 sprintf (buf
, ".startof.%s", secname
);
4730 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
4731 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
4733 h
->type
= bfd_link_hash_defined
;
4734 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, s
);
4735 h
->u
.def
.section
= bfd_abs_section_ptr
;
4738 sprintf (buf
, ".sizeof.%s", secname
);
4739 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
4740 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
4742 h
->type
= bfd_link_hash_defined
;
4743 h
->u
.def
.value
= TO_ADDR (s
->size
);
4744 h
->u
.def
.section
= bfd_abs_section_ptr
;
4754 struct bfd_link_hash_entry
*h
;
4757 if (link_info
.relocatable
|| link_info
.shared
)
4762 if (entry_symbol
.name
== NULL
)
4764 /* No entry has been specified. Look for the default entry, but
4765 don't warn if we don't find it. */
4766 entry_symbol
.name
= entry_symbol_default
;
4770 h
= bfd_link_hash_lookup (link_info
.hash
, entry_symbol
.name
,
4771 FALSE
, FALSE
, TRUE
);
4773 && (h
->type
== bfd_link_hash_defined
4774 || h
->type
== bfd_link_hash_defweak
)
4775 && h
->u
.def
.section
->output_section
!= NULL
)
4779 val
= (h
->u
.def
.value
4780 + bfd_get_section_vma (output_bfd
,
4781 h
->u
.def
.section
->output_section
)
4782 + h
->u
.def
.section
->output_offset
);
4783 if (! bfd_set_start_address (output_bfd
, val
))
4784 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol
.name
);
4791 /* We couldn't find the entry symbol. Try parsing it as a
4793 val
= bfd_scan_vma (entry_symbol
.name
, &send
, 0);
4796 if (! bfd_set_start_address (output_bfd
, val
))
4797 einfo (_("%P%F: can't set start address\n"));
4803 /* Can't find the entry symbol, and it's not a number. Use
4804 the first address in the text section. */
4805 ts
= bfd_get_section_by_name (output_bfd
, entry_section
);
4809 einfo (_("%P: warning: cannot find entry symbol %s;"
4810 " defaulting to %V\n"),
4812 bfd_get_section_vma (output_bfd
, ts
));
4813 if (! bfd_set_start_address (output_bfd
,
4814 bfd_get_section_vma (output_bfd
,
4816 einfo (_("%P%F: can't set start address\n"));
4821 einfo (_("%P: warning: cannot find entry symbol %s;"
4822 " not setting start address\n"),
4828 /* Don't bfd_hash_table_free (&lang_definedness_table);
4829 map file output may result in a call of lang_track_definedness. */
4832 /* This is a small function used when we want to ignore errors from
4836 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED
, ...)
4838 /* Don't do anything. */
4841 /* Check that the architecture of all the input files is compatible
4842 with the output file. Also call the backend to let it do any
4843 other checking that is needed. */
4848 lang_statement_union_type
*file
;
4850 const bfd_arch_info_type
*compatible
;
4852 for (file
= file_chain
.head
; file
!= NULL
; file
= file
->input_statement
.next
)
4854 input_bfd
= file
->input_statement
.the_bfd
;
4856 = bfd_arch_get_compatible (input_bfd
, output_bfd
,
4857 command_line
.accept_unknown_input_arch
);
4859 /* In general it is not possible to perform a relocatable
4860 link between differing object formats when the input
4861 file has relocations, because the relocations in the
4862 input format may not have equivalent representations in
4863 the output format (and besides BFD does not translate
4864 relocs for other link purposes than a final link). */
4865 if ((link_info
.relocatable
|| link_info
.emitrelocations
)
4866 && (compatible
== NULL
4867 || bfd_get_flavour (input_bfd
) != bfd_get_flavour (output_bfd
))
4868 && (bfd_get_file_flags (input_bfd
) & HAS_RELOC
) != 0)
4870 einfo (_("%P%F: Relocatable linking with relocations from"
4871 " format %s (%B) to format %s (%B) is not supported\n"),
4872 bfd_get_target (input_bfd
), input_bfd
,
4873 bfd_get_target (output_bfd
), output_bfd
);
4874 /* einfo with %F exits. */
4877 if (compatible
== NULL
)
4879 if (command_line
.warn_mismatch
)
4880 einfo (_("%P: warning: %s architecture of input file `%B'"
4881 " is incompatible with %s output\n"),
4882 bfd_printable_name (input_bfd
), input_bfd
,
4883 bfd_printable_name (output_bfd
));
4885 else if (bfd_count_sections (input_bfd
))
4887 /* If the input bfd has no contents, it shouldn't set the
4888 private data of the output bfd. */
4890 bfd_error_handler_type pfn
= NULL
;
4892 /* If we aren't supposed to warn about mismatched input
4893 files, temporarily set the BFD error handler to a
4894 function which will do nothing. We still want to call
4895 bfd_merge_private_bfd_data, since it may set up
4896 information which is needed in the output file. */
4897 if (! command_line
.warn_mismatch
)
4898 pfn
= bfd_set_error_handler (ignore_bfd_errors
);
4899 if (! bfd_merge_private_bfd_data (input_bfd
, output_bfd
))
4901 if (command_line
.warn_mismatch
)
4902 einfo (_("%P%X: failed to merge target specific data"
4903 " of file %B\n"), input_bfd
);
4905 if (! command_line
.warn_mismatch
)
4906 bfd_set_error_handler (pfn
);
4911 /* Look through all the global common symbols and attach them to the
4912 correct section. The -sort-common command line switch may be used
4913 to roughly sort the entries by size. */
4918 if (command_line
.inhibit_common_definition
)
4920 if (link_info
.relocatable
4921 && ! command_line
.force_common_definition
)
4924 if (! config
.sort_common
)
4925 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, NULL
);
4930 for (power
= 4; power
>= 0; power
--)
4931 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, &power
);
4935 /* Place one common symbol in the correct section. */
4938 lang_one_common (struct bfd_link_hash_entry
*h
, void *info
)
4940 unsigned int power_of_two
;
4944 if (h
->type
!= bfd_link_hash_common
)
4948 power_of_two
= h
->u
.c
.p
->alignment_power
;
4950 if (config
.sort_common
4951 && power_of_two
< (unsigned int) *(int *) info
)
4954 section
= h
->u
.c
.p
->section
;
4956 /* Increase the size of the section to align the common sym. */
4957 section
->size
+= ((bfd_vma
) 1 << (power_of_two
+ opb_shift
)) - 1;
4958 section
->size
&= (- (bfd_vma
) 1 << (power_of_two
+ opb_shift
));
4960 /* Adjust the alignment if necessary. */
4961 if (power_of_two
> section
->alignment_power
)
4962 section
->alignment_power
= power_of_two
;
4964 /* Change the symbol from common to defined. */
4965 h
->type
= bfd_link_hash_defined
;
4966 h
->u
.def
.section
= section
;
4967 h
->u
.def
.value
= section
->size
;
4969 /* Increase the size of the section. */
4970 section
->size
+= size
;
4972 /* Make sure the section is allocated in memory, and make sure that
4973 it is no longer a common section. */
4974 section
->flags
|= SEC_ALLOC
;
4975 section
->flags
&= ~SEC_IS_COMMON
;
4977 if (config
.map_file
!= NULL
)
4979 static bfd_boolean header_printed
;
4984 if (! header_printed
)
4986 minfo (_("\nAllocating common symbols\n"));
4987 minfo (_("Common symbol size file\n\n"));
4988 header_printed
= TRUE
;
4991 name
= demangle (h
->root
.string
);
4993 len
= strlen (name
);
5008 if (size
<= 0xffffffff)
5009 sprintf (buf
, "%lx", (unsigned long) size
);
5011 sprintf_vma (buf
, size
);
5021 minfo ("%B\n", section
->owner
);
5027 /* Run through the input files and ensure that every input section has
5028 somewhere to go. If one is found without a destination then create
5029 an input request and place it into the statement tree. */
5032 lang_place_orphans (void)
5034 LANG_FOR_EACH_INPUT_STATEMENT (file
)
5038 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
5040 if (s
->output_section
== NULL
)
5042 /* This section of the file is not attached, root
5043 around for a sensible place for it to go. */
5045 if (file
->just_syms_flag
)
5046 bfd_link_just_syms (file
->the_bfd
, s
, &link_info
);
5047 else if ((s
->flags
& SEC_EXCLUDE
) != 0)
5048 s
->output_section
= bfd_abs_section_ptr
;
5049 else if (strcmp (s
->name
, "COMMON") == 0)
5051 /* This is a lonely common section which must have
5052 come from an archive. We attach to the section
5053 with the wildcard. */
5054 if (! link_info
.relocatable
5055 || command_line
.force_common_definition
)
5057 if (default_common_section
== NULL
)
5059 default_common_section
=
5060 lang_output_section_statement_lookup (".bss");
5063 lang_add_section (&default_common_section
->children
, s
,
5064 default_common_section
);
5067 else if (ldemul_place_orphan (s
))
5071 lang_output_section_statement_type
*os
;
5073 os
= lang_output_section_statement_lookup (s
->name
);
5074 lang_add_section (&os
->children
, s
, os
);
5082 lang_set_flags (lang_memory_region_type
*ptr
, const char *flags
, int invert
)
5084 flagword
*ptr_flags
;
5086 ptr_flags
= invert
? &ptr
->not_flags
: &ptr
->flags
;
5092 *ptr_flags
|= SEC_ALLOC
;
5096 *ptr_flags
|= SEC_READONLY
;
5100 *ptr_flags
|= SEC_DATA
;
5104 *ptr_flags
|= SEC_CODE
;
5109 *ptr_flags
|= SEC_LOAD
;
5113 einfo (_("%P%F: invalid syntax in flags\n"));
5120 /* Call a function on each input file. This function will be called
5121 on an archive, but not on the elements. */
5124 lang_for_each_input_file (void (*func
) (lang_input_statement_type
*))
5126 lang_input_statement_type
*f
;
5128 for (f
= (lang_input_statement_type
*) input_file_chain
.head
;
5130 f
= (lang_input_statement_type
*) f
->next_real_file
)
5134 /* Call a function on each file. The function will be called on all
5135 the elements of an archive which are included in the link, but will
5136 not be called on the archive file itself. */
5139 lang_for_each_file (void (*func
) (lang_input_statement_type
*))
5141 LANG_FOR_EACH_INPUT_STATEMENT (f
)
5148 ldlang_add_file (lang_input_statement_type
*entry
)
5152 lang_statement_append (&file_chain
,
5153 (lang_statement_union_type
*) entry
,
5156 /* The BFD linker needs to have a list of all input BFDs involved in
5158 ASSERT (entry
->the_bfd
->link_next
== NULL
);
5159 ASSERT (entry
->the_bfd
!= output_bfd
);
5160 for (pp
= &link_info
.input_bfds
; *pp
!= NULL
; pp
= &(*pp
)->link_next
)
5162 *pp
= entry
->the_bfd
;
5163 entry
->the_bfd
->usrdata
= entry
;
5164 bfd_set_gp_size (entry
->the_bfd
, g_switch_value
);
5166 /* Look through the sections and check for any which should not be
5167 included in the link. We need to do this now, so that we can
5168 notice when the backend linker tries to report multiple
5169 definition errors for symbols which are in sections we aren't
5170 going to link. FIXME: It might be better to entirely ignore
5171 symbols which are defined in sections which are going to be
5172 discarded. This would require modifying the backend linker for
5173 each backend which might set the SEC_LINK_ONCE flag. If we do
5174 this, we should probably handle SEC_EXCLUDE in the same way. */
5176 bfd_map_over_sections (entry
->the_bfd
, section_already_linked
, entry
);
5180 lang_add_output (const char *name
, int from_script
)
5182 /* Make -o on command line override OUTPUT in script. */
5183 if (!had_output_filename
|| !from_script
)
5185 output_filename
= name
;
5186 had_output_filename
= TRUE
;
5190 static lang_output_section_statement_type
*current_section
;
5201 for (l
= 0; l
< 32; l
++)
5203 if (i
>= (unsigned int) x
)
5211 lang_output_section_statement_type
*
5212 lang_enter_output_section_statement (const char *output_section_statement_name
,
5213 etree_type
*address_exp
,
5214 enum section_type sectype
,
5216 etree_type
*subalign
,
5220 lang_output_section_statement_type
*os
;
5222 os
= lang_output_section_statement_lookup_1 (output_section_statement_name
,
5224 current_section
= os
;
5226 /* Make next things chain into subchain of this. */
5228 if (os
->addr_tree
== NULL
)
5230 os
->addr_tree
= address_exp
;
5232 os
->sectype
= sectype
;
5233 if (sectype
!= noload_section
)
5234 os
->flags
= SEC_NO_FLAGS
;
5236 os
->flags
= SEC_NEVER_LOAD
;
5237 os
->block_value
= 1;
5238 stat_ptr
= &os
->children
;
5240 os
->subsection_alignment
=
5241 topower (exp_get_value_int (subalign
, -1, "subsection alignment"));
5242 os
->section_alignment
=
5243 topower (exp_get_value_int (align
, -1, "section alignment"));
5245 os
->load_base
= ebase
;
5252 lang_output_statement_type
*new;
5254 new = new_stat (lang_output_statement
, stat_ptr
);
5255 new->name
= output_filename
;
5258 /* Reset the current counters in the regions. */
5261 lang_reset_memory_regions (void)
5263 lang_memory_region_type
*p
= lang_memory_region_list
;
5265 lang_output_section_statement_type
*os
;
5267 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
5269 p
->old_length
= (bfd_size_type
) (p
->current
- p
->origin
);
5270 p
->current
= p
->origin
;
5273 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5276 os
->processed
= FALSE
;
5278 for (o
= output_bfd
->sections
; o
!= NULL
; o
= o
->next
)
5280 /* Save the last size for possible use by bfd_relax_section. */
5281 o
->rawsize
= o
->size
;
5286 /* Worker for lang_gc_sections_1. */
5289 gc_section_callback (lang_wild_statement_type
*ptr
,
5290 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
5292 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
5293 void *data ATTRIBUTE_UNUSED
)
5295 /* If the wild pattern was marked KEEP, the member sections
5296 should be as well. */
5297 if (ptr
->keep_sections
)
5298 section
->flags
|= SEC_KEEP
;
5301 /* Iterate over sections marking them against GC. */
5304 lang_gc_sections_1 (lang_statement_union_type
*s
)
5306 for (; s
!= NULL
; s
= s
->header
.next
)
5308 switch (s
->header
.type
)
5310 case lang_wild_statement_enum
:
5311 walk_wild (&s
->wild_statement
, gc_section_callback
, NULL
);
5313 case lang_constructors_statement_enum
:
5314 lang_gc_sections_1 (constructor_list
.head
);
5316 case lang_output_section_statement_enum
:
5317 lang_gc_sections_1 (s
->output_section_statement
.children
.head
);
5319 case lang_group_statement_enum
:
5320 lang_gc_sections_1 (s
->group_statement
.children
.head
);
5329 lang_gc_sections (void)
5331 struct bfd_link_hash_entry
*h
;
5332 ldlang_undef_chain_list_type
*ulist
;
5334 /* Keep all sections so marked in the link script. */
5336 lang_gc_sections_1 (statement_list
.head
);
5338 /* Keep all sections containing symbols undefined on the command-line,
5339 and the section containing the entry symbol. */
5341 for (ulist
= link_info
.gc_sym_list
; ulist
; ulist
= ulist
->next
)
5343 h
= bfd_link_hash_lookup (link_info
.hash
, ulist
->name
,
5344 FALSE
, FALSE
, FALSE
);
5347 && (h
->type
== bfd_link_hash_defined
5348 || h
->type
== bfd_link_hash_defweak
)
5349 && ! bfd_is_abs_section (h
->u
.def
.section
))
5351 h
->u
.def
.section
->flags
|= SEC_KEEP
;
5355 /* SEC_EXCLUDE is ignored when doing a relocatable link, except in
5356 the special case of debug info. (See bfd/stabs.c)
5357 Twiddle the flag here, to simplify later linker code. */
5358 if (link_info
.relocatable
)
5360 LANG_FOR_EACH_INPUT_STATEMENT (f
)
5363 for (sec
= f
->the_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5364 if ((sec
->flags
& SEC_DEBUGGING
) == 0)
5365 sec
->flags
&= ~SEC_EXCLUDE
;
5369 if (link_info
.gc_sections
)
5370 bfd_gc_sections (output_bfd
, &link_info
);
5376 current_target
= default_target
;
5378 /* Open the output file. */
5379 lang_for_each_statement (ldlang_open_output
);
5382 ldemul_create_output_section_statements ();
5384 /* Add to the hash table all undefineds on the command line. */
5385 lang_place_undefineds ();
5387 if (!bfd_section_already_linked_table_init ())
5388 einfo (_("%P%F: Failed to create hash table\n"));
5390 /* Create a bfd for each input file. */
5391 current_target
= default_target
;
5392 open_input_bfds (statement_list
.head
, FALSE
);
5394 link_info
.gc_sym_list
= &entry_symbol
;
5395 if (entry_symbol
.name
== NULL
)
5396 link_info
.gc_sym_list
= ldlang_undef_chain_list_head
;
5398 ldemul_after_open ();
5400 bfd_section_already_linked_table_free ();
5402 /* Make sure that we're not mixing architectures. We call this
5403 after all the input files have been opened, but before we do any
5404 other processing, so that any operations merge_private_bfd_data
5405 does on the output file will be known during the rest of the
5409 /* Handle .exports instead of a version script if we're told to do so. */
5410 if (command_line
.version_exports_section
)
5411 lang_do_version_exports_section ();
5413 /* Build all sets based on the information gathered from the input
5415 ldctor_build_sets ();
5417 /* Remove unreferenced sections if asked to. */
5418 lang_gc_sections ();
5420 /* Size up the common data. */
5423 /* Update wild statements. */
5424 update_wild_statements (statement_list
.head
);
5426 /* Run through the contours of the script and attach input sections
5427 to the correct output sections. */
5428 map_input_to_output_sections (statement_list
.head
, NULL
, NULL
);
5430 /* Find any sections not attached explicitly and handle them. */
5431 lang_place_orphans ();
5433 if (! link_info
.relocatable
)
5437 /* Merge SEC_MERGE sections. This has to be done after GC of
5438 sections, so that GCed sections are not merged, but before
5439 assigning dynamic symbols, since removing whole input sections
5441 bfd_merge_sections (output_bfd
, &link_info
);
5443 /* Look for a text section and set the readonly attribute in it. */
5444 found
= bfd_get_section_by_name (output_bfd
, ".text");
5448 if (config
.text_read_only
)
5449 found
->flags
|= SEC_READONLY
;
5451 found
->flags
&= ~SEC_READONLY
;
5455 /* Do anything special before sizing sections. This is where ELF
5456 and other back-ends size dynamic sections. */
5457 ldemul_before_allocation ();
5459 /* We must record the program headers before we try to fix the
5460 section positions, since they will affect SIZEOF_HEADERS. */
5461 lang_record_phdrs ();
5463 /* Size up the sections. */
5464 lang_size_sections (NULL
, !command_line
.relax
);
5466 /* Now run around and relax if we can. */
5467 if (command_line
.relax
)
5469 /* Keep relaxing until bfd_relax_section gives up. */
5470 bfd_boolean relax_again
;
5474 relax_again
= FALSE
;
5476 /* Note: pe-dll.c does something like this also. If you find
5477 you need to change this code, you probably need to change
5478 pe-dll.c also. DJ */
5480 /* Do all the assignments with our current guesses as to
5482 lang_do_assignments ();
5484 /* We must do this after lang_do_assignments, because it uses
5486 lang_reset_memory_regions ();
5488 /* Perform another relax pass - this time we know where the
5489 globals are, so can make a better guess. */
5490 lang_size_sections (&relax_again
, FALSE
);
5492 /* If the normal relax is done and the relax finalize pass
5493 is not performed yet, we perform another relax pass. */
5494 if (!relax_again
&& link_info
.need_relax_finalize
)
5496 link_info
.need_relax_finalize
= FALSE
;
5500 while (relax_again
);
5502 /* Final extra sizing to report errors. */
5503 lang_do_assignments ();
5504 lang_reset_memory_regions ();
5505 lang_size_sections (NULL
, TRUE
);
5508 /* See if anything special should be done now we know how big
5510 ldemul_after_allocation ();
5512 /* Fix any .startof. or .sizeof. symbols. */
5513 lang_set_startof ();
5515 /* Do all the assignments, now that we know the final resting places
5516 of all the symbols. */
5518 lang_do_assignments ();
5520 /* Make sure that the section addresses make sense. */
5521 if (! link_info
.relocatable
5522 && command_line
.check_section_addresses
)
5523 lang_check_section_addresses ();
5530 /* EXPORTED TO YACC */
5533 lang_add_wild (struct wildcard_spec
*filespec
,
5534 struct wildcard_list
*section_list
,
5535 bfd_boolean keep_sections
)
5537 struct wildcard_list
*curr
, *next
;
5538 lang_wild_statement_type
*new;
5540 /* Reverse the list as the parser puts it back to front. */
5541 for (curr
= section_list
, section_list
= NULL
;
5543 section_list
= curr
, curr
= next
)
5545 if (curr
->spec
.name
!= NULL
&& strcmp (curr
->spec
.name
, "COMMON") == 0)
5546 placed_commons
= TRUE
;
5549 curr
->next
= section_list
;
5552 if (filespec
!= NULL
&& filespec
->name
!= NULL
)
5554 if (strcmp (filespec
->name
, "*") == 0)
5555 filespec
->name
= NULL
;
5556 else if (! wildcardp (filespec
->name
))
5557 lang_has_input_file
= TRUE
;
5560 new = new_stat (lang_wild_statement
, stat_ptr
);
5561 new->filename
= NULL
;
5562 new->filenames_sorted
= FALSE
;
5563 if (filespec
!= NULL
)
5565 new->filename
= filespec
->name
;
5566 new->filenames_sorted
= filespec
->sorted
== by_name
;
5568 new->section_list
= section_list
;
5569 new->keep_sections
= keep_sections
;
5570 lang_list_init (&new->children
);
5571 analyze_walk_wild_section_handler (new);
5575 lang_section_start (const char *name
, etree_type
*address
,
5576 const segment_type
*segment
)
5578 lang_address_statement_type
*ad
;
5580 ad
= new_stat (lang_address_statement
, stat_ptr
);
5581 ad
->section_name
= name
;
5582 ad
->address
= address
;
5583 ad
->segment
= segment
;
5586 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
5587 because of a -e argument on the command line, or zero if this is
5588 called by ENTRY in a linker script. Command line arguments take
5592 lang_add_entry (const char *name
, bfd_boolean cmdline
)
5594 if (entry_symbol
.name
== NULL
5596 || ! entry_from_cmdline
)
5598 entry_symbol
.name
= name
;
5599 entry_from_cmdline
= cmdline
;
5603 /* Set the default start symbol to NAME. .em files should use this,
5604 not lang_add_entry, to override the use of "start" if neither the
5605 linker script nor the command line specifies an entry point. NAME
5606 must be permanently allocated. */
5608 lang_default_entry (const char *name
)
5610 entry_symbol_default
= name
;
5614 lang_add_target (const char *name
)
5616 lang_target_statement_type
*new;
5618 new = new_stat (lang_target_statement
, stat_ptr
);
5623 lang_add_map (const char *name
)
5630 map_option_f
= TRUE
;
5638 lang_add_fill (fill_type
*fill
)
5640 lang_fill_statement_type
*new;
5642 new = new_stat (lang_fill_statement
, stat_ptr
);
5647 lang_add_data (int type
, union etree_union
*exp
)
5649 lang_data_statement_type
*new;
5651 new = new_stat (lang_data_statement
, stat_ptr
);
5656 /* Create a new reloc statement. RELOC is the BFD relocation type to
5657 generate. HOWTO is the corresponding howto structure (we could
5658 look this up, but the caller has already done so). SECTION is the
5659 section to generate a reloc against, or NAME is the name of the
5660 symbol to generate a reloc against. Exactly one of SECTION and
5661 NAME must be NULL. ADDEND is an expression for the addend. */
5664 lang_add_reloc (bfd_reloc_code_real_type reloc
,
5665 reloc_howto_type
*howto
,
5668 union etree_union
*addend
)
5670 lang_reloc_statement_type
*p
= new_stat (lang_reloc_statement
, stat_ptr
);
5674 p
->section
= section
;
5676 p
->addend_exp
= addend
;
5678 p
->addend_value
= 0;
5679 p
->output_section
= NULL
;
5680 p
->output_offset
= 0;
5683 lang_assignment_statement_type
*
5684 lang_add_assignment (etree_type
*exp
)
5686 lang_assignment_statement_type
*new;
5688 new = new_stat (lang_assignment_statement
, stat_ptr
);
5694 lang_add_attribute (enum statement_enum attribute
)
5696 new_statement (attribute
, sizeof (lang_statement_header_type
), stat_ptr
);
5700 lang_startup (const char *name
)
5702 if (startup_file
!= NULL
)
5704 einfo (_("%P%F: multiple STARTUP files\n"));
5706 first_file
->filename
= name
;
5707 first_file
->local_sym_name
= name
;
5708 first_file
->real
= TRUE
;
5710 startup_file
= name
;
5714 lang_float (bfd_boolean maybe
)
5716 lang_float_flag
= maybe
;
5720 /* Work out the load- and run-time regions from a script statement, and
5721 store them in *LMA_REGION and *REGION respectively.
5723 MEMSPEC is the name of the run-time region, or the value of
5724 DEFAULT_MEMORY_REGION if the statement didn't specify one.
5725 LMA_MEMSPEC is the name of the load-time region, or null if the
5726 statement didn't specify one.HAVE_LMA_P is TRUE if the statement
5727 had an explicit load address.
5729 It is an error to specify both a load region and a load address. */
5732 lang_get_regions (lang_memory_region_type
**region
,
5733 lang_memory_region_type
**lma_region
,
5734 const char *memspec
,
5735 const char *lma_memspec
,
5736 bfd_boolean have_lma
,
5737 bfd_boolean have_vma
)
5739 *lma_region
= lang_memory_region_lookup (lma_memspec
, FALSE
);
5741 /* If no runtime region or VMA has been specified, but the load region
5742 has been specified, then use the load region for the runtime region
5744 if (lma_memspec
!= NULL
5746 && strcmp (memspec
, DEFAULT_MEMORY_REGION
) == 0)
5747 *region
= *lma_region
;
5749 *region
= lang_memory_region_lookup (memspec
, FALSE
);
5751 if (have_lma
&& lma_memspec
!= 0)
5752 einfo (_("%X%P:%S: section has both a load address and a load region\n"));
5756 lang_leave_output_section_statement (fill_type
*fill
, const char *memspec
,
5757 lang_output_section_phdr_list
*phdrs
,
5758 const char *lma_memspec
)
5760 lang_get_regions (¤t_section
->region
,
5761 ¤t_section
->lma_region
,
5762 memspec
, lma_memspec
,
5763 current_section
->load_base
!= NULL
,
5764 current_section
->addr_tree
!= NULL
);
5765 current_section
->fill
= fill
;
5766 current_section
->phdrs
= phdrs
;
5767 stat_ptr
= &statement_list
;
5770 /* Create an absolute symbol with the given name with the value of the
5771 address of first byte of the section named.
5773 If the symbol already exists, then do nothing. */
5776 lang_abs_symbol_at_beginning_of (const char *secname
, const char *name
)
5778 struct bfd_link_hash_entry
*h
;
5780 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
5782 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5784 if (h
->type
== bfd_link_hash_new
5785 || h
->type
== bfd_link_hash_undefined
)
5789 h
->type
= bfd_link_hash_defined
;
5791 sec
= bfd_get_section_by_name (output_bfd
, secname
);
5795 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, sec
);
5797 h
->u
.def
.section
= bfd_abs_section_ptr
;
5801 /* Create an absolute symbol with the given name with the value of the
5802 address of the first byte after the end of the section named.
5804 If the symbol already exists, then do nothing. */
5807 lang_abs_symbol_at_end_of (const char *secname
, const char *name
)
5809 struct bfd_link_hash_entry
*h
;
5811 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
5813 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5815 if (h
->type
== bfd_link_hash_new
5816 || h
->type
== bfd_link_hash_undefined
)
5820 h
->type
= bfd_link_hash_defined
;
5822 sec
= bfd_get_section_by_name (output_bfd
, secname
);
5826 h
->u
.def
.value
= (bfd_get_section_vma (output_bfd
, sec
)
5827 + TO_ADDR (sec
->size
));
5829 h
->u
.def
.section
= bfd_abs_section_ptr
;
5834 lang_statement_append (lang_statement_list_type
*list
,
5835 lang_statement_union_type
*element
,
5836 lang_statement_union_type
**field
)
5838 *(list
->tail
) = element
;
5842 /* Set the output format type. -oformat overrides scripts. */
5845 lang_add_output_format (const char *format
,
5850 if (output_target
== NULL
|| !from_script
)
5852 if (command_line
.endian
== ENDIAN_BIG
5855 else if (command_line
.endian
== ENDIAN_LITTLE
5859 output_target
= format
;
5863 /* Enter a group. This creates a new lang_group_statement, and sets
5864 stat_ptr to build new statements within the group. */
5867 lang_enter_group (void)
5869 lang_group_statement_type
*g
;
5871 g
= new_stat (lang_group_statement
, stat_ptr
);
5872 lang_list_init (&g
->children
);
5873 stat_ptr
= &g
->children
;
5876 /* Leave a group. This just resets stat_ptr to start writing to the
5877 regular list of statements again. Note that this will not work if
5878 groups can occur inside anything else which can adjust stat_ptr,
5879 but currently they can't. */
5882 lang_leave_group (void)
5884 stat_ptr
= &statement_list
;
5887 /* Add a new program header. This is called for each entry in a PHDRS
5888 command in a linker script. */
5891 lang_new_phdr (const char *name
,
5893 bfd_boolean filehdr
,
5898 struct lang_phdr
*n
, **pp
;
5900 n
= stat_alloc (sizeof (struct lang_phdr
));
5903 n
->type
= exp_get_value_int (type
, 0, "program header type");
5904 n
->filehdr
= filehdr
;
5909 for (pp
= &lang_phdr_list
; *pp
!= NULL
; pp
= &(*pp
)->next
)
5914 /* Record the program header information in the output BFD. FIXME: We
5915 should not be calling an ELF specific function here. */
5918 lang_record_phdrs (void)
5922 lang_output_section_phdr_list
*last
;
5923 struct lang_phdr
*l
;
5924 lang_output_section_statement_type
*os
;
5927 secs
= xmalloc (alc
* sizeof (asection
*));
5929 for (l
= lang_phdr_list
; l
!= NULL
; l
= l
->next
)
5936 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5940 lang_output_section_phdr_list
*pl
;
5942 if (os
->constraint
== -1)
5950 if (os
->sectype
== noload_section
5951 || os
->bfd_section
== NULL
5952 || (os
->bfd_section
->flags
& SEC_ALLOC
) == 0)
5957 if (os
->bfd_section
== NULL
)
5960 for (; pl
!= NULL
; pl
= pl
->next
)
5962 if (strcmp (pl
->name
, l
->name
) == 0)
5967 secs
= xrealloc (secs
, alc
* sizeof (asection
*));
5969 secs
[c
] = os
->bfd_section
;
5976 if (l
->flags
== NULL
)
5979 flags
= exp_get_vma (l
->flags
, 0, "phdr flags");
5984 at
= exp_get_vma (l
->at
, 0, "phdr load address");
5986 if (! bfd_record_phdr (output_bfd
, l
->type
,
5987 l
->flags
!= NULL
, flags
, l
->at
!= NULL
,
5988 at
, l
->filehdr
, l
->phdrs
, c
, secs
))
5989 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
5994 /* Make sure all the phdr assignments succeeded. */
5995 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5999 lang_output_section_phdr_list
*pl
;
6001 if (os
->constraint
== -1
6002 || os
->bfd_section
== NULL
)
6005 for (pl
= os
->phdrs
;
6008 if (! pl
->used
&& strcmp (pl
->name
, "NONE") != 0)
6009 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
6010 os
->name
, pl
->name
);
6014 /* Record a list of sections which may not be cross referenced. */
6017 lang_add_nocrossref (lang_nocrossref_type
*l
)
6019 struct lang_nocrossrefs
*n
;
6021 n
= xmalloc (sizeof *n
);
6022 n
->next
= nocrossref_list
;
6024 nocrossref_list
= n
;
6026 /* Set notice_all so that we get informed about all symbols. */
6027 link_info
.notice_all
= TRUE
;
6030 /* Overlay handling. We handle overlays with some static variables. */
6032 /* The overlay virtual address. */
6033 static etree_type
*overlay_vma
;
6034 /* And subsection alignment. */
6035 static etree_type
*overlay_subalign
;
6037 /* An expression for the maximum section size seen so far. */
6038 static etree_type
*overlay_max
;
6040 /* A list of all the sections in this overlay. */
6042 struct overlay_list
{
6043 struct overlay_list
*next
;
6044 lang_output_section_statement_type
*os
;
6047 static struct overlay_list
*overlay_list
;
6049 /* Start handling an overlay. */
6052 lang_enter_overlay (etree_type
*vma_expr
, etree_type
*subalign
)
6054 /* The grammar should prevent nested overlays from occurring. */
6055 ASSERT (overlay_vma
== NULL
6056 && overlay_subalign
== NULL
6057 && overlay_max
== NULL
);
6059 overlay_vma
= vma_expr
;
6060 overlay_subalign
= subalign
;
6063 /* Start a section in an overlay. We handle this by calling
6064 lang_enter_output_section_statement with the correct VMA.
6065 lang_leave_overlay sets up the LMA and memory regions. */
6068 lang_enter_overlay_section (const char *name
)
6070 struct overlay_list
*n
;
6073 lang_enter_output_section_statement (name
, overlay_vma
, normal_section
,
6074 0, overlay_subalign
, 0, 0);
6076 /* If this is the first section, then base the VMA of future
6077 sections on this one. This will work correctly even if `.' is
6078 used in the addresses. */
6079 if (overlay_list
== NULL
)
6080 overlay_vma
= exp_nameop (ADDR
, name
);
6082 /* Remember the section. */
6083 n
= xmalloc (sizeof *n
);
6084 n
->os
= current_section
;
6085 n
->next
= overlay_list
;
6088 size
= exp_nameop (SIZEOF
, name
);
6090 /* Arrange to work out the maximum section end address. */
6091 if (overlay_max
== NULL
)
6094 overlay_max
= exp_binop (MAX_K
, overlay_max
, size
);
6097 /* Finish a section in an overlay. There isn't any special to do
6101 lang_leave_overlay_section (fill_type
*fill
,
6102 lang_output_section_phdr_list
*phdrs
)
6109 name
= current_section
->name
;
6111 /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory
6112 region and that no load-time region has been specified. It doesn't
6113 really matter what we say here, since lang_leave_overlay will
6115 lang_leave_output_section_statement (fill
, DEFAULT_MEMORY_REGION
, phdrs
, 0);
6117 /* Define the magic symbols. */
6119 clean
= xmalloc (strlen (name
) + 1);
6121 for (s1
= name
; *s1
!= '\0'; s1
++)
6122 if (ISALNUM (*s1
) || *s1
== '_')
6126 buf
= xmalloc (strlen (clean
) + sizeof "__load_start_");
6127 sprintf (buf
, "__load_start_%s", clean
);
6128 lang_add_assignment (exp_assop ('=', buf
,
6129 exp_nameop (LOADADDR
, name
)));
6131 buf
= xmalloc (strlen (clean
) + sizeof "__load_stop_");
6132 sprintf (buf
, "__load_stop_%s", clean
);
6133 lang_add_assignment (exp_assop ('=', buf
,
6135 exp_nameop (LOADADDR
, name
),
6136 exp_nameop (SIZEOF
, name
))));
6141 /* Finish an overlay. If there are any overlay wide settings, this
6142 looks through all the sections in the overlay and sets them. */
6145 lang_leave_overlay (etree_type
*lma_expr
,
6148 const char *memspec
,
6149 lang_output_section_phdr_list
*phdrs
,
6150 const char *lma_memspec
)
6152 lang_memory_region_type
*region
;
6153 lang_memory_region_type
*lma_region
;
6154 struct overlay_list
*l
;
6155 lang_nocrossref_type
*nocrossref
;
6157 lang_get_regions (®ion
, &lma_region
,
6158 memspec
, lma_memspec
,
6159 lma_expr
!= NULL
, FALSE
);
6163 /* After setting the size of the last section, set '.' to end of the
6165 if (overlay_list
!= NULL
)
6166 overlay_list
->os
->update_dot_tree
6167 = exp_assop ('=', ".", exp_binop ('+', overlay_vma
, overlay_max
));
6172 struct overlay_list
*next
;
6174 if (fill
!= NULL
&& l
->os
->fill
== NULL
)
6177 l
->os
->region
= region
;
6178 l
->os
->lma_region
= lma_region
;
6180 /* The first section has the load address specified in the
6181 OVERLAY statement. The rest are worked out from that.
6182 The base address is not needed (and should be null) if
6183 an LMA region was specified. */
6185 l
->os
->load_base
= lma_expr
;
6186 else if (lma_region
== 0)
6187 l
->os
->load_base
= exp_binop ('+',
6188 exp_nameop (LOADADDR
, l
->next
->os
->name
),
6189 exp_nameop (SIZEOF
, l
->next
->os
->name
));
6191 if (phdrs
!= NULL
&& l
->os
->phdrs
== NULL
)
6192 l
->os
->phdrs
= phdrs
;
6196 lang_nocrossref_type
*nc
;
6198 nc
= xmalloc (sizeof *nc
);
6199 nc
->name
= l
->os
->name
;
6200 nc
->next
= nocrossref
;
6209 if (nocrossref
!= NULL
)
6210 lang_add_nocrossref (nocrossref
);
6213 overlay_list
= NULL
;
6217 /* Version handling. This is only useful for ELF. */
6219 /* This global variable holds the version tree that we build. */
6221 struct bfd_elf_version_tree
*lang_elf_version_info
;
6223 /* If PREV is NULL, return first version pattern matching particular symbol.
6224 If PREV is non-NULL, return first version pattern matching particular
6225 symbol after PREV (previously returned by lang_vers_match). */
6227 static struct bfd_elf_version_expr
*
6228 lang_vers_match (struct bfd_elf_version_expr_head
*head
,
6229 struct bfd_elf_version_expr
*prev
,
6232 const char *cxx_sym
= sym
;
6233 const char *java_sym
= sym
;
6234 struct bfd_elf_version_expr
*expr
= NULL
;
6236 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
6238 cxx_sym
= cplus_demangle (sym
, DMGL_PARAMS
| DMGL_ANSI
);
6242 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
6244 java_sym
= cplus_demangle (sym
, DMGL_JAVA
);
6249 if (head
->htab
&& (prev
== NULL
|| prev
->symbol
))
6251 struct bfd_elf_version_expr e
;
6253 switch (prev
? prev
->mask
: 0)
6256 if (head
->mask
& BFD_ELF_VERSION_C_TYPE
)
6259 expr
= htab_find (head
->htab
, &e
);
6260 while (expr
&& strcmp (expr
->symbol
, sym
) == 0)
6261 if (expr
->mask
== BFD_ELF_VERSION_C_TYPE
)
6267 case BFD_ELF_VERSION_C_TYPE
:
6268 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
6271 expr
= htab_find (head
->htab
, &e
);
6272 while (expr
&& strcmp (expr
->symbol
, cxx_sym
) == 0)
6273 if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
6279 case BFD_ELF_VERSION_CXX_TYPE
:
6280 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
6282 e
.symbol
= java_sym
;
6283 expr
= htab_find (head
->htab
, &e
);
6284 while (expr
&& strcmp (expr
->symbol
, java_sym
) == 0)
6285 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
6296 /* Finally, try the wildcards. */
6297 if (prev
== NULL
|| prev
->symbol
)
6298 expr
= head
->remaining
;
6301 for (; expr
; expr
= expr
->next
)
6308 if (expr
->pattern
[0] == '*' && expr
->pattern
[1] == '\0')
6311 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
6313 else if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
6317 if (fnmatch (expr
->pattern
, s
, 0) == 0)
6323 free ((char *) cxx_sym
);
6324 if (java_sym
!= sym
)
6325 free ((char *) java_sym
);
6329 /* Return NULL if the PATTERN argument is a glob pattern, otherwise,
6330 return a string pointing to the symbol name. */
6333 realsymbol (const char *pattern
)
6336 bfd_boolean changed
= FALSE
, backslash
= FALSE
;
6337 char *s
, *symbol
= xmalloc (strlen (pattern
) + 1);
6339 for (p
= pattern
, s
= symbol
; *p
!= '\0'; ++p
)
6341 /* It is a glob pattern only if there is no preceding
6343 if (! backslash
&& (*p
== '?' || *p
== '*' || *p
== '['))
6351 /* Remove the preceding backslash. */
6358 backslash
= *p
== '\\';
6373 /* This is called for each variable name or match expression. NEW is
6374 the name of the symbol to match, or, if LITERAL_P is FALSE, a glob
6375 pattern to be matched against symbol names. */
6377 struct bfd_elf_version_expr
*
6378 lang_new_vers_pattern (struct bfd_elf_version_expr
*orig
,
6381 bfd_boolean literal_p
)
6383 struct bfd_elf_version_expr
*ret
;
6385 ret
= xmalloc (sizeof *ret
);
6387 ret
->pattern
= literal_p
? NULL
: new;
6390 ret
->symbol
= literal_p
? new : realsymbol (new);
6392 if (lang
== NULL
|| strcasecmp (lang
, "C") == 0)
6393 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
6394 else if (strcasecmp (lang
, "C++") == 0)
6395 ret
->mask
= BFD_ELF_VERSION_CXX_TYPE
;
6396 else if (strcasecmp (lang
, "Java") == 0)
6397 ret
->mask
= BFD_ELF_VERSION_JAVA_TYPE
;
6400 einfo (_("%X%P: unknown language `%s' in version information\n"),
6402 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
6405 return ldemul_new_vers_pattern (ret
);
6408 /* This is called for each set of variable names and match
6411 struct bfd_elf_version_tree
*
6412 lang_new_vers_node (struct bfd_elf_version_expr
*globals
,
6413 struct bfd_elf_version_expr
*locals
)
6415 struct bfd_elf_version_tree
*ret
;
6417 ret
= xcalloc (1, sizeof *ret
);
6418 ret
->globals
.list
= globals
;
6419 ret
->locals
.list
= locals
;
6420 ret
->match
= lang_vers_match
;
6421 ret
->name_indx
= (unsigned int) -1;
6425 /* This static variable keeps track of version indices. */
6427 static int version_index
;
6430 version_expr_head_hash (const void *p
)
6432 const struct bfd_elf_version_expr
*e
= p
;
6434 return htab_hash_string (e
->symbol
);
6438 version_expr_head_eq (const void *p1
, const void *p2
)
6440 const struct bfd_elf_version_expr
*e1
= p1
;
6441 const struct bfd_elf_version_expr
*e2
= p2
;
6443 return strcmp (e1
->symbol
, e2
->symbol
) == 0;
6447 lang_finalize_version_expr_head (struct bfd_elf_version_expr_head
*head
)
6450 struct bfd_elf_version_expr
*e
, *next
;
6451 struct bfd_elf_version_expr
**list_loc
, **remaining_loc
;
6453 for (e
= head
->list
; e
; e
= e
->next
)
6457 head
->mask
|= e
->mask
;
6462 head
->htab
= htab_create (count
* 2, version_expr_head_hash
,
6463 version_expr_head_eq
, NULL
);
6464 list_loc
= &head
->list
;
6465 remaining_loc
= &head
->remaining
;
6466 for (e
= head
->list
; e
; e
= next
)
6472 remaining_loc
= &e
->next
;
6476 void **loc
= htab_find_slot (head
->htab
, e
, INSERT
);
6480 struct bfd_elf_version_expr
*e1
, *last
;
6486 if (e1
->mask
== e
->mask
)
6494 while (e1
&& strcmp (e1
->symbol
, e
->symbol
) == 0);
6498 /* This is a duplicate. */
6499 /* FIXME: Memory leak. Sometimes pattern is not
6500 xmalloced alone, but in larger chunk of memory. */
6501 /* free (e->symbol); */
6506 e
->next
= last
->next
;
6514 list_loc
= &e
->next
;
6518 *remaining_loc
= NULL
;
6519 *list_loc
= head
->remaining
;
6522 head
->remaining
= head
->list
;
6525 /* This is called when we know the name and dependencies of the
6529 lang_register_vers_node (const char *name
,
6530 struct bfd_elf_version_tree
*version
,
6531 struct bfd_elf_version_deps
*deps
)
6533 struct bfd_elf_version_tree
*t
, **pp
;
6534 struct bfd_elf_version_expr
*e1
;
6539 if ((name
[0] == '\0' && lang_elf_version_info
!= NULL
)
6540 || (lang_elf_version_info
&& lang_elf_version_info
->name
[0] == '\0'))
6542 einfo (_("%X%P: anonymous version tag cannot be combined"
6543 " with other version tags\n"));
6548 /* Make sure this node has a unique name. */
6549 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6550 if (strcmp (t
->name
, name
) == 0)
6551 einfo (_("%X%P: duplicate version tag `%s'\n"), name
);
6553 lang_finalize_version_expr_head (&version
->globals
);
6554 lang_finalize_version_expr_head (&version
->locals
);
6556 /* Check the global and local match names, and make sure there
6557 aren't any duplicates. */
6559 for (e1
= version
->globals
.list
; e1
!= NULL
; e1
= e1
->next
)
6561 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6563 struct bfd_elf_version_expr
*e2
;
6565 if (t
->locals
.htab
&& e1
->symbol
)
6567 e2
= htab_find (t
->locals
.htab
, e1
);
6568 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
6570 if (e1
->mask
== e2
->mask
)
6571 einfo (_("%X%P: duplicate expression `%s'"
6572 " in version information\n"), e1
->symbol
);
6576 else if (!e1
->symbol
)
6577 for (e2
= t
->locals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
6578 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
6579 && e1
->mask
== e2
->mask
)
6580 einfo (_("%X%P: duplicate expression `%s'"
6581 " in version information\n"), e1
->pattern
);
6585 for (e1
= version
->locals
.list
; e1
!= NULL
; e1
= e1
->next
)
6587 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6589 struct bfd_elf_version_expr
*e2
;
6591 if (t
->globals
.htab
&& e1
->symbol
)
6593 e2
= htab_find (t
->globals
.htab
, e1
);
6594 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
6596 if (e1
->mask
== e2
->mask
)
6597 einfo (_("%X%P: duplicate expression `%s'"
6598 " in version information\n"),
6603 else if (!e1
->symbol
)
6604 for (e2
= t
->globals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
6605 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
6606 && e1
->mask
== e2
->mask
)
6607 einfo (_("%X%P: duplicate expression `%s'"
6608 " in version information\n"), e1
->pattern
);
6612 version
->deps
= deps
;
6613 version
->name
= name
;
6614 if (name
[0] != '\0')
6617 version
->vernum
= version_index
;
6620 version
->vernum
= 0;
6622 for (pp
= &lang_elf_version_info
; *pp
!= NULL
; pp
= &(*pp
)->next
)
6627 /* This is called when we see a version dependency. */
6629 struct bfd_elf_version_deps
*
6630 lang_add_vers_depend (struct bfd_elf_version_deps
*list
, const char *name
)
6632 struct bfd_elf_version_deps
*ret
;
6633 struct bfd_elf_version_tree
*t
;
6635 ret
= xmalloc (sizeof *ret
);
6638 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6640 if (strcmp (t
->name
, name
) == 0)
6642 ret
->version_needed
= t
;
6647 einfo (_("%X%P: unable to find version dependency `%s'\n"), name
);
6653 lang_do_version_exports_section (void)
6655 struct bfd_elf_version_expr
*greg
= NULL
, *lreg
;
6657 LANG_FOR_EACH_INPUT_STATEMENT (is
)
6659 asection
*sec
= bfd_get_section_by_name (is
->the_bfd
, ".exports");
6667 contents
= xmalloc (len
);
6668 if (!bfd_get_section_contents (is
->the_bfd
, sec
, contents
, 0, len
))
6669 einfo (_("%X%P: unable to read .exports section contents\n"), sec
);
6672 while (p
< contents
+ len
)
6674 greg
= lang_new_vers_pattern (greg
, p
, NULL
, FALSE
);
6675 p
= strchr (p
, '\0') + 1;
6678 /* Do not free the contents, as we used them creating the regex. */
6680 /* Do not include this section in the link. */
6681 sec
->flags
|= SEC_EXCLUDE
;
6684 lreg
= lang_new_vers_pattern (NULL
, "*", NULL
, FALSE
);
6685 lang_register_vers_node (command_line
.version_exports_section
,
6686 lang_new_vers_node (greg
, lreg
), NULL
);
6690 lang_add_unique (const char *name
)
6692 struct unique_sections
*ent
;
6694 for (ent
= unique_section_list
; ent
; ent
= ent
->next
)
6695 if (strcmp (ent
->name
, name
) == 0)
6698 ent
= xmalloc (sizeof *ent
);
6699 ent
->name
= xstrdup (name
);
6700 ent
->next
= unique_section_list
;
6701 unique_section_list
= ent
;