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 /* GCC's strict aliasing rules prevent us from just casting the
916 address, so we store the pointer in a variable and cast that
918 nextp
= &ret
->os
.next
;
919 lang_statement_append (&lang_output_section_statement
,
920 (lang_statement_union_type
*) &ret
->os
,
921 (lang_statement_union_type
**) nextp
);
926 output_statement_table_init (void)
928 if (! bfd_hash_table_init_n (&output_statement_table
,
929 output_statement_newfunc
, 61))
930 einfo (_("%P%F: can not create hash table: %E\n"));
934 output_statement_table_free (void)
936 bfd_hash_table_free (&output_statement_table
);
939 /* Build enough state so that the parser can build its tree. */
944 obstack_begin (&stat_obstack
, 1000);
946 stat_ptr
= &statement_list
;
948 output_statement_table_init ();
950 lang_list_init (stat_ptr
);
952 lang_list_init (&input_file_chain
);
953 lang_list_init (&lang_output_section_statement
);
954 lang_list_init (&file_chain
);
955 first_file
= lang_add_input_file (NULL
, lang_input_file_is_marker_enum
,
958 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME
);
960 abs_output_section
->bfd_section
= bfd_abs_section_ptr
;
962 /* The value "3" is ad-hoc, somewhat related to the expected number of
963 DEFINED expressions in a linker script. For most default linker
964 scripts, there are none. Why a hash table then? Well, it's somewhat
965 simpler to re-use working machinery than using a linked list in terms
966 of code-complexity here in ld, besides the initialization which just
967 looks like other code here. */
968 if (!bfd_hash_table_init_n (&lang_definedness_table
,
969 lang_definedness_newfunc
, 3))
970 einfo (_("%P%F: can not create hash table: %E\n"));
976 output_statement_table_free ();
979 /*----------------------------------------------------------------------
980 A region is an area of memory declared with the
981 MEMORY { name:org=exp, len=exp ... }
984 We maintain a list of all the regions here.
986 If no regions are specified in the script, then the default is used
987 which is created when looked up to be the entire data space.
989 If create is true we are creating a region inside a MEMORY block.
990 In this case it is probably an error to create a region that has
991 already been created. If we are not inside a MEMORY block it is
992 dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION)
993 and so we issue a warning. */
995 static lang_memory_region_type
*lang_memory_region_list
;
996 static lang_memory_region_type
**lang_memory_region_list_tail
997 = &lang_memory_region_list
;
999 lang_memory_region_type
*
1000 lang_memory_region_lookup (const char *const name
, bfd_boolean create
)
1002 lang_memory_region_type
*p
;
1003 lang_memory_region_type
*new;
1005 /* NAME is NULL for LMA memspecs if no region was specified. */
1009 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
1010 if (strcmp (p
->name
, name
) == 0)
1013 einfo (_("%P:%S: warning: redeclaration of memory region '%s'\n"),
1018 if (!create
&& strcmp (name
, DEFAULT_MEMORY_REGION
))
1019 einfo (_("%P:%S: warning: memory region %s not declared\n"), name
);
1021 new = stat_alloc (sizeof (lang_memory_region_type
));
1023 new->name
= xstrdup (name
);
1026 *lang_memory_region_list_tail
= new;
1027 lang_memory_region_list_tail
= &new->next
;
1031 new->length
= ~(bfd_size_type
) 0;
1033 new->had_full_message
= FALSE
;
1038 static lang_memory_region_type
*
1039 lang_memory_default (asection
*section
)
1041 lang_memory_region_type
*p
;
1043 flagword sec_flags
= section
->flags
;
1045 /* Override SEC_DATA to mean a writable section. */
1046 if ((sec_flags
& (SEC_ALLOC
| SEC_READONLY
| SEC_CODE
)) == SEC_ALLOC
)
1047 sec_flags
|= SEC_DATA
;
1049 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
1051 if ((p
->flags
& sec_flags
) != 0
1052 && (p
->not_flags
& sec_flags
) == 0)
1057 return lang_memory_region_lookup (DEFAULT_MEMORY_REGION
, FALSE
);
1060 lang_output_section_statement_type
*
1061 lang_output_section_find (const char *const name
)
1063 struct output_statement_hash_entry
*entry
;
1066 entry
= ((struct output_statement_hash_entry
*)
1067 bfd_hash_lookup (&output_statement_table
, name
, FALSE
, FALSE
));
1071 hash
= entry
->root
.hash
;
1074 if (entry
->os
.constraint
!= -1)
1076 entry
= (struct output_statement_hash_entry
*) entry
->root
.next
;
1078 while (entry
!= NULL
1079 && entry
->root
.hash
== hash
1080 && strcmp (name
, entry
->os
.name
) == 0);
1085 static lang_output_section_statement_type
*
1086 lang_output_section_statement_lookup_1 (const char *const name
, int constraint
)
1088 struct output_statement_hash_entry
*entry
;
1089 struct output_statement_hash_entry
*last_ent
;
1092 entry
= ((struct output_statement_hash_entry
*)
1093 bfd_hash_lookup (&output_statement_table
, name
, TRUE
, FALSE
));
1096 einfo (_("%P%F: failed creating section `%s': %E\n"), name
);
1100 if (entry
->os
.name
!= NULL
)
1102 /* We have a section of this name, but it might not have the correct
1104 hash
= entry
->root
.hash
;
1107 if (entry
->os
.constraint
!= -1
1109 || (constraint
== entry
->os
.constraint
1110 && constraint
!= SPECIAL
)))
1113 entry
= (struct output_statement_hash_entry
*) entry
->root
.next
;
1115 while (entry
!= NULL
1116 && entry
->root
.hash
== hash
1117 && strcmp (name
, entry
->os
.name
) == 0);
1119 entry
= ((struct output_statement_hash_entry
*)
1120 output_statement_newfunc (NULL
, &output_statement_table
, name
));
1123 einfo (_("%P%F: failed creating section `%s': %E\n"), name
);
1126 entry
->root
= last_ent
->root
;
1127 last_ent
->root
.next
= &entry
->root
;
1130 entry
->os
.name
= name
;
1131 entry
->os
.constraint
= constraint
;
1135 lang_output_section_statement_type
*
1136 lang_output_section_statement_lookup (const char *const name
)
1138 return lang_output_section_statement_lookup_1 (name
, 0);
1141 /* A variant of lang_output_section_find used by place_orphan.
1142 Returns the output statement that should precede a new output
1143 statement for SEC. If an exact match is found on certain flags,
1146 lang_output_section_statement_type
*
1147 lang_output_section_find_by_flags (const asection
*sec
,
1148 lang_output_section_statement_type
**exact
,
1149 lang_match_sec_type_func match_type
)
1151 lang_output_section_statement_type
*first
, *look
, *found
;
1154 /* We know the first statement on this list is *ABS*. May as well
1156 first
= &lang_output_section_statement
.head
->output_section_statement
;
1157 first
= first
->next
;
1159 /* First try for an exact match. */
1161 for (look
= first
; look
; look
= look
->next
)
1163 flags
= look
->flags
;
1164 if (look
->bfd_section
!= NULL
)
1166 flags
= look
->bfd_section
->flags
;
1167 if (match_type
&& !match_type (output_bfd
, look
->bfd_section
,
1171 flags
^= sec
->flags
;
1172 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1173 | SEC_CODE
| SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1183 if (sec
->flags
& SEC_CODE
)
1185 /* Try for a rw code section. */
1186 for (look
= first
; look
; look
= look
->next
)
1188 flags
= look
->flags
;
1189 if (look
->bfd_section
!= NULL
)
1191 flags
= look
->bfd_section
->flags
;
1192 if (match_type
&& !match_type (output_bfd
, look
->bfd_section
,
1196 flags
^= sec
->flags
;
1197 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1198 | SEC_CODE
| SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1202 else if (sec
->flags
& (SEC_READONLY
| SEC_THREAD_LOCAL
))
1204 /* .rodata can go after .text, .sdata2 after .rodata. */
1205 for (look
= first
; look
; look
= look
->next
)
1207 flags
= look
->flags
;
1208 if (look
->bfd_section
!= NULL
)
1210 flags
= look
->bfd_section
->flags
;
1211 if (match_type
&& !match_type (output_bfd
, look
->bfd_section
,
1215 flags
^= sec
->flags
;
1216 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1218 && !(look
->flags
& (SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1222 else if (sec
->flags
& SEC_SMALL_DATA
)
1224 /* .sdata goes after .data, .sbss after .sdata. */
1225 for (look
= first
; look
; look
= look
->next
)
1227 flags
= look
->flags
;
1228 if (look
->bfd_section
!= NULL
)
1230 flags
= look
->bfd_section
->flags
;
1231 if (match_type
&& !match_type (output_bfd
, look
->bfd_section
,
1235 flags
^= sec
->flags
;
1236 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1237 | SEC_THREAD_LOCAL
))
1238 || ((look
->flags
& SEC_SMALL_DATA
)
1239 && !(sec
->flags
& SEC_HAS_CONTENTS
)))
1243 else if (sec
->flags
& SEC_HAS_CONTENTS
)
1245 /* .data goes after .rodata. */
1246 for (look
= first
; look
; look
= look
->next
)
1248 flags
= look
->flags
;
1249 if (look
->bfd_section
!= NULL
)
1251 flags
= look
->bfd_section
->flags
;
1252 if (match_type
&& !match_type (output_bfd
, look
->bfd_section
,
1256 flags
^= sec
->flags
;
1257 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1258 | SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1264 /* .bss goes last. */
1265 for (look
= first
; look
; look
= look
->next
)
1267 flags
= look
->flags
;
1268 if (look
->bfd_section
!= NULL
)
1270 flags
= look
->bfd_section
->flags
;
1271 if (match_type
&& !match_type (output_bfd
, look
->bfd_section
,
1275 flags
^= sec
->flags
;
1276 if (!(flags
& SEC_ALLOC
))
1281 if (found
|| !match_type
)
1284 return lang_output_section_find_by_flags (sec
, NULL
, NULL
);
1287 /* Find the last output section before given output statement.
1288 Used by place_orphan. */
1291 output_prev_sec_find (lang_output_section_statement_type
*os
)
1293 asection
*s
= (asection
*) NULL
;
1294 lang_output_section_statement_type
*lookup
;
1296 for (lookup
= &lang_output_section_statement
.head
->output_section_statement
;
1298 lookup
= lookup
->next
)
1300 if (lookup
->constraint
== -1)
1305 if (lookup
->bfd_section
!= NULL
&& lookup
->bfd_section
->owner
!= NULL
)
1306 s
= lookup
->bfd_section
;
1312 lang_output_section_statement_type
*
1313 lang_insert_orphan (asection
*s
,
1314 const char *secname
,
1315 lang_output_section_statement_type
*after
,
1316 struct orphan_save
*place
,
1317 etree_type
*address
,
1318 lang_statement_list_type
*add_child
)
1320 lang_statement_list_type
*old
;
1321 lang_statement_list_type add
;
1323 etree_type
*load_base
;
1324 lang_output_section_statement_type
*os
;
1325 lang_output_section_statement_type
**os_tail
;
1327 /* Start building a list of statements for this section.
1328 First save the current statement pointer. */
1331 /* If we have found an appropriate place for the output section
1332 statements for this orphan, add them to our own private list,
1333 inserting them later into the global statement list. */
1337 lang_list_init (stat_ptr
);
1341 if (config
.build_constructors
)
1343 /* If the name of the section is representable in C, then create
1344 symbols to mark the start and the end of the section. */
1345 for (ps
= secname
; *ps
!= '\0'; ps
++)
1346 if (! ISALNUM ((unsigned char) *ps
) && *ps
!= '_')
1351 etree_type
*e_align
;
1353 symname
= (char *) xmalloc (ps
- secname
+ sizeof "__start_" + 1);
1354 symname
[0] = bfd_get_symbol_leading_char (output_bfd
);
1355 sprintf (symname
+ (symname
[0] != 0), "__start_%s", secname
);
1356 e_align
= exp_unop (ALIGN_K
,
1357 exp_intop ((bfd_vma
) 1 << s
->alignment_power
));
1358 lang_add_assignment (exp_assop ('=', ".", e_align
));
1359 lang_add_assignment (exp_assop ('=', symname
,
1360 exp_nameop (NAME
, ".")));
1364 if (link_info
.relocatable
|| (s
->flags
& (SEC_LOAD
| SEC_ALLOC
)) == 0)
1365 address
= exp_intop (0);
1368 if (after
!= NULL
&& after
->load_base
!= NULL
)
1370 etree_type
*lma_from_vma
;
1371 lma_from_vma
= exp_binop ('-', after
->load_base
,
1372 exp_nameop (ADDR
, after
->name
));
1373 load_base
= exp_binop ('+', lma_from_vma
,
1374 exp_nameop (ADDR
, secname
));
1377 os_tail
= ((lang_output_section_statement_type
**)
1378 lang_output_section_statement
.tail
);
1379 os
= lang_enter_output_section_statement (secname
, address
, 0, NULL
, NULL
,
1382 if (add_child
== NULL
)
1383 add_child
= &os
->children
;
1384 lang_add_section (add_child
, s
, os
);
1386 lang_leave_output_section_statement (0, "*default*", NULL
, NULL
);
1388 if (config
.build_constructors
&& *ps
== '\0')
1392 /* lang_leave_ouput_section_statement resets stat_ptr.
1393 Put stat_ptr back where we want it. */
1397 symname
= (char *) xmalloc (ps
- secname
+ sizeof "__stop_" + 1);
1398 symname
[0] = bfd_get_symbol_leading_char (output_bfd
);
1399 sprintf (symname
+ (symname
[0] != 0), "__stop_%s", secname
);
1400 lang_add_assignment (exp_assop ('=', symname
,
1401 exp_nameop (NAME
, ".")));
1404 /* Restore the global list pointer. */
1408 if (after
!= NULL
&& os
->bfd_section
!= NULL
)
1410 asection
*snew
, *as
;
1412 snew
= os
->bfd_section
;
1414 /* Shuffle the bfd section list to make the output file look
1415 neater. This is really only cosmetic. */
1416 if (place
->section
== NULL
1417 && after
!= (&lang_output_section_statement
.head
1418 ->output_section_statement
))
1420 asection
*bfd_section
= after
->bfd_section
;
1422 /* If the output statement hasn't been used to place any input
1423 sections (and thus doesn't have an output bfd_section),
1424 look for the closest prior output statement having an
1426 if (bfd_section
== NULL
)
1427 bfd_section
= output_prev_sec_find (after
);
1429 if (bfd_section
!= NULL
&& bfd_section
!= snew
)
1430 place
->section
= &bfd_section
->next
;
1433 if (place
->section
== NULL
)
1434 place
->section
= &output_bfd
->sections
;
1436 as
= *place
->section
;
1437 if (as
!= snew
&& as
->prev
!= snew
)
1439 /* Unlink the section. */
1440 bfd_section_list_remove (output_bfd
, snew
);
1442 /* Now tack it back on in the right place. */
1443 bfd_section_list_insert_before (output_bfd
, as
, snew
);
1446 /* Save the end of this list. Further ophans of this type will
1447 follow the one we've just added. */
1448 place
->section
= &snew
->next
;
1450 /* The following is non-cosmetic. We try to put the output
1451 statements in some sort of reasonable order here, because they
1452 determine the final load addresses of the orphan sections.
1453 In addition, placing output statements in the wrong order may
1454 require extra segments. For instance, given a typical
1455 situation of all read-only sections placed in one segment and
1456 following that a segment containing all the read-write
1457 sections, we wouldn't want to place an orphan read/write
1458 section before or amongst the read-only ones. */
1459 if (add
.head
!= NULL
)
1461 lang_output_section_statement_type
*newly_added_os
;
1463 if (place
->stmt
== NULL
)
1465 lang_statement_union_type
**where
;
1466 lang_statement_union_type
**assign
= NULL
;
1467 bfd_boolean ignore_first
;
1469 /* Look for a suitable place for the new statement list.
1470 The idea is to skip over anything that might be inside
1471 a SECTIONS {} statement in a script, before we find
1472 another output_section_statement. Assignments to "dot"
1473 before an output section statement are assumed to
1474 belong to it. An exception to this rule is made for
1475 the first assignment to dot, otherwise we might put an
1476 orphan before . = . + SIZEOF_HEADERS or similar
1477 assignments that set the initial address. */
1479 ignore_first
= after
== (&lang_output_section_statement
.head
1480 ->output_section_statement
);
1481 for (where
= &after
->header
.next
;
1483 where
= &(*where
)->header
.next
)
1485 switch ((*where
)->header
.type
)
1487 case lang_assignment_statement_enum
:
1490 lang_assignment_statement_type
*ass
;
1491 ass
= &(*where
)->assignment_statement
;
1492 if (ass
->exp
->type
.node_class
!= etree_assert
1493 && ass
->exp
->assign
.dst
[0] == '.'
1494 && ass
->exp
->assign
.dst
[1] == 0
1498 ignore_first
= FALSE
;
1500 case lang_wild_statement_enum
:
1501 case lang_input_section_enum
:
1502 case lang_object_symbols_statement_enum
:
1503 case lang_fill_statement_enum
:
1504 case lang_data_statement_enum
:
1505 case lang_reloc_statement_enum
:
1506 case lang_padding_statement_enum
:
1507 case lang_constructors_statement_enum
:
1510 case lang_output_section_statement_enum
:
1513 case lang_input_statement_enum
:
1514 case lang_address_statement_enum
:
1515 case lang_target_statement_enum
:
1516 case lang_output_statement_enum
:
1517 case lang_group_statement_enum
:
1518 case lang_afile_asection_pair_statement_enum
:
1527 place
->os_tail
= &after
->next
;
1531 /* Put it after the last orphan statement we added. */
1532 *add
.tail
= *place
->stmt
;
1533 *place
->stmt
= add
.head
;
1536 /* Fix the global list pointer if we happened to tack our
1537 new list at the tail. */
1538 if (*old
->tail
== add
.head
)
1539 old
->tail
= add
.tail
;
1541 /* Save the end of this list. */
1542 place
->stmt
= add
.tail
;
1544 /* Do the same for the list of output section statements. */
1545 newly_added_os
= *os_tail
;
1547 newly_added_os
->next
= *place
->os_tail
;
1548 *place
->os_tail
= newly_added_os
;
1549 place
->os_tail
= &newly_added_os
->next
;
1551 /* Fixing the global list pointer here is a little different.
1552 We added to the list in lang_enter_output_section_statement,
1553 trimmed off the new output_section_statment above when
1554 assigning *os_tail = NULL, but possibly added it back in
1555 the same place when assigning *place->os_tail. */
1556 if (*os_tail
== NULL
)
1557 lang_output_section_statement
.tail
1558 = (lang_statement_union_type
**) os_tail
;
1565 lang_map_flags (flagword flag
)
1567 if (flag
& SEC_ALLOC
)
1570 if (flag
& SEC_CODE
)
1573 if (flag
& SEC_READONLY
)
1576 if (flag
& SEC_DATA
)
1579 if (flag
& SEC_LOAD
)
1586 lang_memory_region_type
*m
;
1589 minfo (_("\nMemory Configuration\n\n"));
1590 fprintf (config
.map_file
, "%-16s %-18s %-18s %s\n",
1591 _("Name"), _("Origin"), _("Length"), _("Attributes"));
1593 for (m
= lang_memory_region_list
; m
!= NULL
; m
= m
->next
)
1598 fprintf (config
.map_file
, "%-16s ", m
->name
);
1600 sprintf_vma (buf
, m
->origin
);
1601 minfo ("0x%s ", buf
);
1609 minfo ("0x%V", m
->length
);
1610 if (m
->flags
|| m
->not_flags
)
1618 lang_map_flags (m
->flags
);
1624 lang_map_flags (m
->not_flags
);
1631 fprintf (config
.map_file
, _("\nLinker script and memory map\n\n"));
1633 if (! command_line
.reduce_memory_overheads
)
1635 obstack_begin (&map_obstack
, 1000);
1636 for (p
= link_info
.input_bfds
; p
!= (bfd
*) NULL
; p
= p
->link_next
)
1637 bfd_map_over_sections (p
, init_map_userdata
, 0);
1638 bfd_link_hash_traverse (link_info
.hash
, sort_def_symbol
, 0);
1640 print_statements ();
1644 init_map_userdata (abfd
, sec
, data
)
1645 bfd
*abfd ATTRIBUTE_UNUSED
;
1647 void *data ATTRIBUTE_UNUSED
;
1649 fat_section_userdata_type
*new_data
1650 = ((fat_section_userdata_type
*) (stat_alloc
1651 (sizeof (fat_section_userdata_type
))));
1653 ASSERT (get_userdata (sec
) == NULL
);
1654 get_userdata (sec
) = new_data
;
1655 new_data
->map_symbol_def_tail
= &new_data
->map_symbol_def_head
;
1659 sort_def_symbol (hash_entry
, info
)
1660 struct bfd_link_hash_entry
*hash_entry
;
1661 void *info ATTRIBUTE_UNUSED
;
1663 if (hash_entry
->type
== bfd_link_hash_defined
1664 || hash_entry
->type
== bfd_link_hash_defweak
)
1666 struct fat_user_section_struct
*ud
;
1667 struct map_symbol_def
*def
;
1669 ud
= get_userdata (hash_entry
->u
.def
.section
);
1672 /* ??? What do we have to do to initialize this beforehand? */
1673 /* The first time we get here is bfd_abs_section... */
1674 init_map_userdata (0, hash_entry
->u
.def
.section
, 0);
1675 ud
= get_userdata (hash_entry
->u
.def
.section
);
1677 else if (!ud
->map_symbol_def_tail
)
1678 ud
->map_symbol_def_tail
= &ud
->map_symbol_def_head
;
1680 def
= obstack_alloc (&map_obstack
, sizeof *def
);
1681 def
->entry
= hash_entry
;
1682 *(ud
->map_symbol_def_tail
) = def
;
1683 ud
->map_symbol_def_tail
= &def
->next
;
1688 /* Initialize an output section. */
1691 init_os (lang_output_section_statement_type
*s
, asection
*isec
)
1693 if (s
->bfd_section
!= NULL
)
1696 if (strcmp (s
->name
, DISCARD_SECTION_NAME
) == 0)
1697 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME
);
1699 s
->bfd_section
= bfd_get_section_by_name (output_bfd
, s
->name
);
1700 if (s
->bfd_section
== NULL
)
1701 s
->bfd_section
= bfd_make_section (output_bfd
, s
->name
);
1702 if (s
->bfd_section
== NULL
)
1704 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
1705 output_bfd
->xvec
->name
, s
->name
);
1707 s
->bfd_section
->output_section
= s
->bfd_section
;
1708 s
->bfd_section
->output_offset
= 0;
1709 if (!command_line
.reduce_memory_overheads
)
1711 fat_section_userdata_type
*new
1712 = stat_alloc (sizeof (fat_section_userdata_type
));
1713 memset (new, 0, sizeof (fat_section_userdata_type
));
1714 get_userdata (s
->bfd_section
) = new;
1718 /* If there is a base address, make sure that any sections it might
1719 mention are initialized. */
1720 if (s
->addr_tree
!= NULL
)
1721 exp_init_os (s
->addr_tree
);
1723 if (s
->load_base
!= NULL
)
1724 exp_init_os (s
->load_base
);
1726 /* If supplied an alignment, set it. */
1727 if (s
->section_alignment
!= -1)
1728 s
->bfd_section
->alignment_power
= s
->section_alignment
;
1731 bfd_init_private_section_data (isec
->owner
, isec
,
1732 output_bfd
, s
->bfd_section
,
1736 /* Make sure that all output sections mentioned in an expression are
1740 exp_init_os (etree_type
*exp
)
1742 switch (exp
->type
.node_class
)
1746 exp_init_os (exp
->assign
.src
);
1750 exp_init_os (exp
->binary
.lhs
);
1751 exp_init_os (exp
->binary
.rhs
);
1755 exp_init_os (exp
->trinary
.cond
);
1756 exp_init_os (exp
->trinary
.lhs
);
1757 exp_init_os (exp
->trinary
.rhs
);
1761 exp_init_os (exp
->assert_s
.child
);
1765 exp_init_os (exp
->unary
.child
);
1769 switch (exp
->type
.node_code
)
1775 lang_output_section_statement_type
*os
;
1777 os
= lang_output_section_find (exp
->name
.name
);
1778 if (os
!= NULL
&& os
->bfd_section
== NULL
)
1790 section_already_linked (bfd
*abfd
, asection
*sec
, void *data
)
1792 lang_input_statement_type
*entry
= data
;
1794 /* If we are only reading symbols from this object, then we want to
1795 discard all sections. */
1796 if (entry
->just_syms_flag
)
1798 bfd_link_just_syms (abfd
, sec
, &link_info
);
1802 if (!(abfd
->flags
& DYNAMIC
))
1803 bfd_section_already_linked (abfd
, sec
);
1806 /* The wild routines.
1808 These expand statements like *(.text) and foo.o to a list of
1809 explicit actions, like foo.o(.text), bar.o(.text) and
1810 foo.o(.text, .data). */
1812 /* Add SECTION to the output section OUTPUT. Do this by creating a
1813 lang_input_section statement which is placed at PTR. FILE is the
1814 input file which holds SECTION. */
1817 lang_add_section (lang_statement_list_type
*ptr
,
1819 lang_output_section_statement_type
*output
)
1821 flagword flags
= section
->flags
;
1822 bfd_boolean discard
;
1824 /* Discard sections marked with SEC_EXCLUDE. */
1825 discard
= (flags
& SEC_EXCLUDE
) != 0;
1827 /* Discard input sections which are assigned to a section named
1828 DISCARD_SECTION_NAME. */
1829 if (strcmp (output
->name
, DISCARD_SECTION_NAME
) == 0)
1832 /* Discard debugging sections if we are stripping debugging
1834 if ((link_info
.strip
== strip_debugger
|| link_info
.strip
== strip_all
)
1835 && (flags
& SEC_DEBUGGING
) != 0)
1840 if (section
->output_section
== NULL
)
1842 /* This prevents future calls from assigning this section. */
1843 section
->output_section
= bfd_abs_section_ptr
;
1848 if (section
->output_section
== NULL
)
1851 lang_input_section_type
*new;
1854 if (output
->bfd_section
== NULL
)
1855 init_os (output
, section
);
1857 first
= ! output
->bfd_section
->linker_has_input
;
1858 output
->bfd_section
->linker_has_input
= 1;
1860 if (!link_info
.relocatable
1861 && !stripped_excluded_sections
)
1863 asection
*s
= output
->bfd_section
->map_tail
.s
;
1864 output
->bfd_section
->map_tail
.s
= section
;
1865 section
->map_head
.s
= NULL
;
1866 section
->map_tail
.s
= s
;
1868 s
->map_head
.s
= section
;
1870 output
->bfd_section
->map_head
.s
= section
;
1873 /* Add a section reference to the list. */
1874 new = new_stat (lang_input_section
, ptr
);
1876 new->section
= section
;
1877 section
->output_section
= output
->bfd_section
;
1879 flags
= section
->flags
;
1881 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1882 to an output section, because we want to be able to include a
1883 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1884 section (I don't know why we want to do this, but we do).
1885 build_link_order in ldwrite.c handles this case by turning
1886 the embedded SEC_NEVER_LOAD section into a fill. */
1888 flags
&= ~ SEC_NEVER_LOAD
;
1890 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1891 already been processed. One reason to do this is that on pe
1892 format targets, .text$foo sections go into .text and it's odd
1893 to see .text with SEC_LINK_ONCE set. */
1895 if (! link_info
.relocatable
)
1896 flags
&= ~ (SEC_LINK_ONCE
| SEC_LINK_DUPLICATES
);
1898 /* If this is not the first input section, and the SEC_READONLY
1899 flag is not currently set, then don't set it just because the
1900 input section has it set. */
1902 if (! first
&& (output
->bfd_section
->flags
& SEC_READONLY
) == 0)
1903 flags
&= ~ SEC_READONLY
;
1905 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1907 && ((output
->bfd_section
->flags
& (SEC_MERGE
| SEC_STRINGS
))
1908 != (flags
& (SEC_MERGE
| SEC_STRINGS
))
1909 || ((flags
& SEC_MERGE
)
1910 && output
->bfd_section
->entsize
!= section
->entsize
)))
1912 output
->bfd_section
->flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1913 flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1916 output
->bfd_section
->flags
|= flags
;
1918 if (flags
& SEC_MERGE
)
1919 output
->bfd_section
->entsize
= section
->entsize
;
1921 /* If SEC_READONLY is not set in the input section, then clear
1922 it from the output section. */
1923 if ((section
->flags
& SEC_READONLY
) == 0)
1924 output
->bfd_section
->flags
&= ~SEC_READONLY
;
1926 switch (output
->sectype
)
1928 case normal_section
:
1933 case overlay_section
:
1934 output
->bfd_section
->flags
&= ~SEC_ALLOC
;
1936 case noload_section
:
1937 output
->bfd_section
->flags
&= ~SEC_LOAD
;
1938 output
->bfd_section
->flags
|= SEC_NEVER_LOAD
;
1942 /* Copy over SEC_SMALL_DATA. */
1943 if (section
->flags
& SEC_SMALL_DATA
)
1944 output
->bfd_section
->flags
|= SEC_SMALL_DATA
;
1946 if (section
->alignment_power
> output
->bfd_section
->alignment_power
)
1947 output
->bfd_section
->alignment_power
= section
->alignment_power
;
1949 if (bfd_get_arch (section
->owner
) == bfd_arch_tic54x
1950 && (section
->flags
& SEC_TIC54X_BLOCK
) != 0)
1952 output
->bfd_section
->flags
|= SEC_TIC54X_BLOCK
;
1953 /* FIXME: This value should really be obtained from the bfd... */
1954 output
->block_value
= 128;
1959 /* Compare sections ASEC and BSEC according to SORT. */
1962 compare_section (sort_type sort
, asection
*asec
, asection
*bsec
)
1971 case by_alignment_name
:
1972 ret
= (bfd_section_alignment (bsec
->owner
, bsec
)
1973 - bfd_section_alignment (asec
->owner
, asec
));
1979 ret
= strcmp (bfd_get_section_name (asec
->owner
, asec
),
1980 bfd_get_section_name (bsec
->owner
, bsec
));
1983 case by_name_alignment
:
1984 ret
= strcmp (bfd_get_section_name (asec
->owner
, asec
),
1985 bfd_get_section_name (bsec
->owner
, bsec
));
1991 ret
= (bfd_section_alignment (bsec
->owner
, bsec
)
1992 - bfd_section_alignment (asec
->owner
, asec
));
1999 /* Handle wildcard sorting. This returns the lang_input_section which
2000 should follow the one we are going to create for SECTION and FILE,
2001 based on the sorting requirements of WILD. It returns NULL if the
2002 new section should just go at the end of the current list. */
2004 static lang_statement_union_type
*
2005 wild_sort (lang_wild_statement_type
*wild
,
2006 struct wildcard_list
*sec
,
2007 lang_input_statement_type
*file
,
2010 const char *section_name
;
2011 lang_statement_union_type
*l
;
2013 if (!wild
->filenames_sorted
2014 && (sec
== NULL
|| sec
->spec
.sorted
== none
))
2017 section_name
= bfd_get_section_name (file
->the_bfd
, section
);
2018 for (l
= wild
->children
.head
; l
!= NULL
; l
= l
->header
.next
)
2020 lang_input_section_type
*ls
;
2022 if (l
->header
.type
!= lang_input_section_enum
)
2024 ls
= &l
->input_section
;
2026 /* Sorting by filename takes precedence over sorting by section
2029 if (wild
->filenames_sorted
)
2031 const char *fn
, *ln
;
2035 /* The PE support for the .idata section as generated by
2036 dlltool assumes that files will be sorted by the name of
2037 the archive and then the name of the file within the
2040 if (file
->the_bfd
!= NULL
2041 && bfd_my_archive (file
->the_bfd
) != NULL
)
2043 fn
= bfd_get_filename (bfd_my_archive (file
->the_bfd
));
2048 fn
= file
->filename
;
2052 if (bfd_my_archive (ls
->section
->owner
) != NULL
)
2054 ln
= bfd_get_filename (bfd_my_archive (ls
->section
->owner
));
2059 ln
= ls
->section
->owner
->filename
;
2063 i
= strcmp (fn
, ln
);
2072 fn
= file
->filename
;
2074 ln
= ls
->section
->owner
->filename
;
2076 i
= strcmp (fn
, ln
);
2084 /* Here either the files are not sorted by name, or we are
2085 looking at the sections for this file. */
2087 if (sec
!= NULL
&& sec
->spec
.sorted
!= none
)
2088 if (compare_section (sec
->spec
.sorted
, section
, ls
->section
) < 0)
2095 /* Expand a wild statement for a particular FILE. SECTION may be
2096 NULL, in which case it is a wild card. */
2099 output_section_callback (lang_wild_statement_type
*ptr
,
2100 struct wildcard_list
*sec
,
2102 lang_input_statement_type
*file
,
2105 lang_statement_union_type
*before
;
2107 /* Exclude sections that match UNIQUE_SECTION_LIST. */
2108 if (unique_section_p (section
))
2111 before
= wild_sort (ptr
, sec
, file
, section
);
2113 /* Here BEFORE points to the lang_input_section which
2114 should follow the one we are about to add. If BEFORE
2115 is NULL, then the section should just go at the end
2116 of the current list. */
2119 lang_add_section (&ptr
->children
, section
,
2120 (lang_output_section_statement_type
*) output
);
2123 lang_statement_list_type list
;
2124 lang_statement_union_type
**pp
;
2126 lang_list_init (&list
);
2127 lang_add_section (&list
, section
,
2128 (lang_output_section_statement_type
*) output
);
2130 /* If we are discarding the section, LIST.HEAD will
2132 if (list
.head
!= NULL
)
2134 ASSERT (list
.head
->header
.next
== NULL
);
2136 for (pp
= &ptr
->children
.head
;
2138 pp
= &(*pp
)->header
.next
)
2139 ASSERT (*pp
!= NULL
);
2141 list
.head
->header
.next
= *pp
;
2147 /* Check if all sections in a wild statement for a particular FILE
2151 check_section_callback (lang_wild_statement_type
*ptr ATTRIBUTE_UNUSED
,
2152 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
2154 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
2157 /* Exclude sections that match UNIQUE_SECTION_LIST. */
2158 if (unique_section_p (section
))
2161 if (section
->output_section
== NULL
&& (section
->flags
& SEC_READONLY
) == 0)
2162 ((lang_output_section_statement_type
*) data
)->all_input_readonly
= FALSE
;
2165 /* This is passed a file name which must have been seen already and
2166 added to the statement tree. We will see if it has been opened
2167 already and had its symbols read. If not then we'll read it. */
2169 static lang_input_statement_type
*
2170 lookup_name (const char *name
)
2172 lang_input_statement_type
*search
;
2174 for (search
= (lang_input_statement_type
*) input_file_chain
.head
;
2176 search
= (lang_input_statement_type
*) search
->next_real_file
)
2178 /* Use the local_sym_name as the name of the file that has
2179 already been loaded as filename might have been transformed
2180 via the search directory lookup mechanism. */
2181 const char * filename
= search
->local_sym_name
;
2183 if (filename
== NULL
&& name
== NULL
)
2185 if (filename
!= NULL
2187 && strcmp (filename
, name
) == 0)
2192 search
= new_afile (name
, lang_input_file_is_search_file_enum
,
2193 default_target
, FALSE
);
2195 /* If we have already added this file, or this file is not real
2196 (FIXME: can that ever actually happen?) or the name is NULL
2197 (FIXME: can that ever actually happen?) don't add this file. */
2200 || search
->filename
== NULL
)
2203 if (! load_symbols (search
, NULL
))
2209 /* Save LIST as a list of libraries whose symbols should not be exported. */
2214 struct excluded_lib
*next
;
2216 static struct excluded_lib
*excluded_libs
;
2219 add_excluded_libs (const char *list
)
2221 const char *p
= list
, *end
;
2225 struct excluded_lib
*entry
;
2226 end
= strpbrk (p
, ",:");
2228 end
= p
+ strlen (p
);
2229 entry
= xmalloc (sizeof (*entry
));
2230 entry
->next
= excluded_libs
;
2231 entry
->name
= xmalloc (end
- p
+ 1);
2232 memcpy (entry
->name
, p
, end
- p
);
2233 entry
->name
[end
- p
] = '\0';
2234 excluded_libs
= entry
;
2242 check_excluded_libs (bfd
*abfd
)
2244 struct excluded_lib
*lib
= excluded_libs
;
2248 int len
= strlen (lib
->name
);
2249 const char *filename
= lbasename (abfd
->filename
);
2251 if (strcmp (lib
->name
, "ALL") == 0)
2253 abfd
->no_export
= TRUE
;
2257 if (strncmp (lib
->name
, filename
, len
) == 0
2258 && (filename
[len
] == '\0'
2259 || (filename
[len
] == '.' && filename
[len
+ 1] == 'a'
2260 && filename
[len
+ 2] == '\0')))
2262 abfd
->no_export
= TRUE
;
2270 /* Get the symbols for an input file. */
2273 load_symbols (lang_input_statement_type
*entry
,
2274 lang_statement_list_type
*place
)
2281 ldfile_open_file (entry
);
2283 if (! bfd_check_format (entry
->the_bfd
, bfd_archive
)
2284 && ! bfd_check_format_matches (entry
->the_bfd
, bfd_object
, &matching
))
2287 lang_statement_list_type
*hold
;
2288 bfd_boolean bad_load
= TRUE
;
2289 bfd_boolean save_ldlang_sysrooted_script
;
2291 err
= bfd_get_error ();
2293 /* See if the emulation has some special knowledge. */
2294 if (ldemul_unrecognized_file (entry
))
2297 if (err
== bfd_error_file_ambiguously_recognized
)
2301 einfo (_("%B: file not recognized: %E\n"), entry
->the_bfd
);
2302 einfo (_("%B: matching formats:"), entry
->the_bfd
);
2303 for (p
= matching
; *p
!= NULL
; p
++)
2307 else if (err
!= bfd_error_file_not_recognized
2309 einfo (_("%F%B: file not recognized: %E\n"), entry
->the_bfd
);
2313 bfd_close (entry
->the_bfd
);
2314 entry
->the_bfd
= NULL
;
2316 /* Try to interpret the file as a linker script. */
2317 ldfile_open_command_file (entry
->filename
);
2321 save_ldlang_sysrooted_script
= ldlang_sysrooted_script
;
2322 ldlang_sysrooted_script
= entry
->sysrooted
;
2324 ldfile_assumed_script
= TRUE
;
2325 parser_input
= input_script
;
2326 /* We want to use the same -Bdynamic/-Bstatic as the one for
2328 config
.dynamic_link
= entry
->dynamic
;
2330 ldfile_assumed_script
= FALSE
;
2332 ldlang_sysrooted_script
= save_ldlang_sysrooted_script
;
2338 if (ldemul_recognized_file (entry
))
2341 /* We don't call ldlang_add_file for an archive. Instead, the
2342 add_symbols entry point will call ldlang_add_file, via the
2343 add_archive_element callback, for each element of the archive
2345 switch (bfd_get_format (entry
->the_bfd
))
2351 ldlang_add_file (entry
);
2352 if (trace_files
|| trace_file_tries
)
2353 info_msg ("%I\n", entry
);
2357 check_excluded_libs (entry
->the_bfd
);
2359 if (entry
->whole_archive
)
2362 bfd_boolean loaded
= TRUE
;
2366 member
= bfd_openr_next_archived_file (entry
->the_bfd
, member
);
2371 if (! bfd_check_format (member
, bfd_object
))
2373 einfo (_("%F%B: member %B in archive is not an object\n"),
2374 entry
->the_bfd
, member
);
2378 if (! ((*link_info
.callbacks
->add_archive_element
)
2379 (&link_info
, member
, "--whole-archive")))
2382 if (! bfd_link_add_symbols (member
, &link_info
))
2384 einfo (_("%F%B: could not read symbols: %E\n"), member
);
2389 entry
->loaded
= loaded
;
2395 if (bfd_link_add_symbols (entry
->the_bfd
, &link_info
))
2396 entry
->loaded
= TRUE
;
2398 einfo (_("%F%B: could not read symbols: %E\n"), entry
->the_bfd
);
2400 return entry
->loaded
;
2403 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
2404 may be NULL, indicating that it is a wildcard. Separate
2405 lang_input_section statements are created for each part of the
2406 expansion; they are added after the wild statement S. OUTPUT is
2407 the output section. */
2410 wild (lang_wild_statement_type
*s
,
2411 const char *target ATTRIBUTE_UNUSED
,
2412 lang_output_section_statement_type
*output
)
2414 struct wildcard_list
*sec
;
2416 walk_wild (s
, output_section_callback
, output
);
2418 for (sec
= s
->section_list
; sec
!= NULL
; sec
= sec
->next
)
2420 if (default_common_section
!= NULL
)
2422 if (sec
->spec
.name
!= NULL
&& strcmp (sec
->spec
.name
, "COMMON") == 0)
2424 /* Remember the section that common is going to in case we
2425 later get something which doesn't know where to put it. */
2426 default_common_section
= output
;
2431 /* Return TRUE iff target is the sought target. */
2434 get_target (const bfd_target
*target
, void *data
)
2436 const char *sought
= data
;
2438 return strcmp (target
->name
, sought
) == 0;
2441 /* Like strcpy() but convert to lower case as well. */
2444 stricpy (char *dest
, char *src
)
2448 while ((c
= *src
++) != 0)
2449 *dest
++ = TOLOWER (c
);
2454 /* Remove the first occurrence of needle (if any) in haystack
2458 strcut (char *haystack
, char *needle
)
2460 haystack
= strstr (haystack
, needle
);
2466 for (src
= haystack
+ strlen (needle
); *src
;)
2467 *haystack
++ = *src
++;
2473 /* Compare two target format name strings.
2474 Return a value indicating how "similar" they are. */
2477 name_compare (char *first
, char *second
)
2483 copy1
= xmalloc (strlen (first
) + 1);
2484 copy2
= xmalloc (strlen (second
) + 1);
2486 /* Convert the names to lower case. */
2487 stricpy (copy1
, first
);
2488 stricpy (copy2
, second
);
2490 /* Remove size and endian strings from the name. */
2491 strcut (copy1
, "big");
2492 strcut (copy1
, "little");
2493 strcut (copy2
, "big");
2494 strcut (copy2
, "little");
2496 /* Return a value based on how many characters match,
2497 starting from the beginning. If both strings are
2498 the same then return 10 * their length. */
2499 for (result
= 0; copy1
[result
] == copy2
[result
]; result
++)
2500 if (copy1
[result
] == 0)
2512 /* Set by closest_target_match() below. */
2513 static const bfd_target
*winner
;
2515 /* Scan all the valid bfd targets looking for one that has the endianness
2516 requirement that was specified on the command line, and is the nearest
2517 match to the original output target. */
2520 closest_target_match (const bfd_target
*target
, void *data
)
2522 const bfd_target
*original
= data
;
2524 if (command_line
.endian
== ENDIAN_BIG
2525 && target
->byteorder
!= BFD_ENDIAN_BIG
)
2528 if (command_line
.endian
== ENDIAN_LITTLE
2529 && target
->byteorder
!= BFD_ENDIAN_LITTLE
)
2532 /* Must be the same flavour. */
2533 if (target
->flavour
!= original
->flavour
)
2536 /* If we have not found a potential winner yet, then record this one. */
2543 /* Oh dear, we now have two potential candidates for a successful match.
2544 Compare their names and choose the better one. */
2545 if (name_compare (target
->name
, original
->name
)
2546 > name_compare (winner
->name
, original
->name
))
2549 /* Keep on searching until wqe have checked them all. */
2553 /* Return the BFD target format of the first input file. */
2556 get_first_input_target (void)
2558 char *target
= NULL
;
2560 LANG_FOR_EACH_INPUT_STATEMENT (s
)
2562 if (s
->header
.type
== lang_input_statement_enum
2565 ldfile_open_file (s
);
2567 if (s
->the_bfd
!= NULL
2568 && bfd_check_format (s
->the_bfd
, bfd_object
))
2570 target
= bfd_get_target (s
->the_bfd
);
2582 lang_get_output_target (void)
2586 /* Has the user told us which output format to use? */
2587 if (output_target
!= NULL
)
2588 return output_target
;
2590 /* No - has the current target been set to something other than
2592 if (current_target
!= default_target
)
2593 return current_target
;
2595 /* No - can we determine the format of the first input file? */
2596 target
= get_first_input_target ();
2600 /* Failed - use the default output target. */
2601 return default_target
;
2604 /* Open the output file. */
2607 open_output (const char *name
)
2611 output_target
= lang_get_output_target ();
2613 /* Has the user requested a particular endianness on the command
2615 if (command_line
.endian
!= ENDIAN_UNSET
)
2617 const bfd_target
*target
;
2618 enum bfd_endian desired_endian
;
2620 /* Get the chosen target. */
2621 target
= bfd_search_for_target (get_target
, (void *) output_target
);
2623 /* If the target is not supported, we cannot do anything. */
2626 if (command_line
.endian
== ENDIAN_BIG
)
2627 desired_endian
= BFD_ENDIAN_BIG
;
2629 desired_endian
= BFD_ENDIAN_LITTLE
;
2631 /* See if the target has the wrong endianness. This should
2632 not happen if the linker script has provided big and
2633 little endian alternatives, but some scrips don't do
2635 if (target
->byteorder
!= desired_endian
)
2637 /* If it does, then see if the target provides
2638 an alternative with the correct endianness. */
2639 if (target
->alternative_target
!= NULL
2640 && (target
->alternative_target
->byteorder
== desired_endian
))
2641 output_target
= target
->alternative_target
->name
;
2644 /* Try to find a target as similar as possible to
2645 the default target, but which has the desired
2646 endian characteristic. */
2647 bfd_search_for_target (closest_target_match
,
2650 /* Oh dear - we could not find any targets that
2651 satisfy our requirements. */
2653 einfo (_("%P: warning: could not find any targets"
2654 " that match endianness requirement\n"));
2656 output_target
= winner
->name
;
2662 output
= bfd_openw (name
, output_target
);
2666 if (bfd_get_error () == bfd_error_invalid_target
)
2667 einfo (_("%P%F: target %s not found\n"), output_target
);
2669 einfo (_("%P%F: cannot open output file %s: %E\n"), name
);
2672 delete_output_file_on_failure
= TRUE
;
2674 if (! bfd_set_format (output
, bfd_object
))
2675 einfo (_("%P%F:%s: can not make object file: %E\n"), name
);
2676 if (! bfd_set_arch_mach (output
,
2677 ldfile_output_architecture
,
2678 ldfile_output_machine
))
2679 einfo (_("%P%F:%s: can not set architecture: %E\n"), name
);
2681 link_info
.hash
= bfd_link_hash_table_create (output
);
2682 if (link_info
.hash
== NULL
)
2683 einfo (_("%P%F: can not create hash table: %E\n"));
2685 bfd_set_gp_size (output
, g_switch_value
);
2690 ldlang_open_output (lang_statement_union_type
*statement
)
2692 switch (statement
->header
.type
)
2694 case lang_output_statement_enum
:
2695 ASSERT (output_bfd
== NULL
);
2696 output_bfd
= open_output (statement
->output_statement
.name
);
2697 ldemul_set_output_arch ();
2698 if (config
.magic_demand_paged
&& !link_info
.relocatable
)
2699 output_bfd
->flags
|= D_PAGED
;
2701 output_bfd
->flags
&= ~D_PAGED
;
2702 if (config
.text_read_only
)
2703 output_bfd
->flags
|= WP_TEXT
;
2705 output_bfd
->flags
&= ~WP_TEXT
;
2706 if (link_info
.traditional_format
)
2707 output_bfd
->flags
|= BFD_TRADITIONAL_FORMAT
;
2709 output_bfd
->flags
&= ~BFD_TRADITIONAL_FORMAT
;
2712 case lang_target_statement_enum
:
2713 current_target
= statement
->target_statement
.target
;
2720 /* Convert between addresses in bytes and sizes in octets.
2721 For currently supported targets, octets_per_byte is always a power
2722 of two, so we can use shifts. */
2723 #define TO_ADDR(X) ((X) >> opb_shift)
2724 #define TO_SIZE(X) ((X) << opb_shift)
2726 /* Support the above. */
2727 static unsigned int opb_shift
= 0;
2732 unsigned x
= bfd_arch_mach_octets_per_byte (ldfile_output_architecture
,
2733 ldfile_output_machine
);
2736 while ((x
& 1) == 0)
2744 /* Open all the input files. */
2747 open_input_bfds (lang_statement_union_type
*s
, bfd_boolean force
)
2749 for (; s
!= NULL
; s
= s
->header
.next
)
2751 switch (s
->header
.type
)
2753 case lang_constructors_statement_enum
:
2754 open_input_bfds (constructor_list
.head
, force
);
2756 case lang_output_section_statement_enum
:
2757 open_input_bfds (s
->output_section_statement
.children
.head
, force
);
2759 case lang_wild_statement_enum
:
2760 /* Maybe we should load the file's symbols. */
2761 if (s
->wild_statement
.filename
2762 && ! wildcardp (s
->wild_statement
.filename
))
2763 lookup_name (s
->wild_statement
.filename
);
2764 open_input_bfds (s
->wild_statement
.children
.head
, force
);
2766 case lang_group_statement_enum
:
2768 struct bfd_link_hash_entry
*undefs
;
2770 /* We must continually search the entries in the group
2771 until no new symbols are added to the list of undefined
2776 undefs
= link_info
.hash
->undefs_tail
;
2777 open_input_bfds (s
->group_statement
.children
.head
, TRUE
);
2779 while (undefs
!= link_info
.hash
->undefs_tail
);
2782 case lang_target_statement_enum
:
2783 current_target
= s
->target_statement
.target
;
2785 case lang_input_statement_enum
:
2786 if (s
->input_statement
.real
)
2788 lang_statement_list_type add
;
2790 s
->input_statement
.target
= current_target
;
2792 /* If we are being called from within a group, and this
2793 is an archive which has already been searched, then
2794 force it to be researched unless the whole archive
2795 has been loaded already. */
2797 && !s
->input_statement
.whole_archive
2798 && s
->input_statement
.loaded
2799 && bfd_check_format (s
->input_statement
.the_bfd
,
2801 s
->input_statement
.loaded
= FALSE
;
2803 lang_list_init (&add
);
2805 if (! load_symbols (&s
->input_statement
, &add
))
2806 config
.make_executable
= FALSE
;
2808 if (add
.head
!= NULL
)
2810 *add
.tail
= s
->header
.next
;
2811 s
->header
.next
= add
.head
;
2821 /* Add a symbol to a hash of symbols used in DEFINED (NAME) expressions. */
2824 lang_track_definedness (const char *name
)
2826 if (bfd_hash_lookup (&lang_definedness_table
, name
, TRUE
, FALSE
) == NULL
)
2827 einfo (_("%P%F: bfd_hash_lookup failed creating symbol %s\n"), name
);
2830 /* New-function for the definedness hash table. */
2832 static struct bfd_hash_entry
*
2833 lang_definedness_newfunc (struct bfd_hash_entry
*entry
,
2834 struct bfd_hash_table
*table ATTRIBUTE_UNUSED
,
2835 const char *name ATTRIBUTE_UNUSED
)
2837 struct lang_definedness_hash_entry
*ret
2838 = (struct lang_definedness_hash_entry
*) entry
;
2841 ret
= (struct lang_definedness_hash_entry
*)
2842 bfd_hash_allocate (table
, sizeof (struct lang_definedness_hash_entry
));
2845 einfo (_("%P%F: bfd_hash_allocate failed creating symbol %s\n"), name
);
2847 ret
->iteration
= -1;
2851 /* Return the iteration when the definition of NAME was last updated. A
2852 value of -1 means that the symbol is not defined in the linker script
2853 or the command line, but may be defined in the linker symbol table. */
2856 lang_symbol_definition_iteration (const char *name
)
2858 struct lang_definedness_hash_entry
*defentry
2859 = (struct lang_definedness_hash_entry
*)
2860 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2862 /* We've already created this one on the presence of DEFINED in the
2863 script, so it can't be NULL unless something is borked elsewhere in
2865 if (defentry
== NULL
)
2868 return defentry
->iteration
;
2871 /* Update the definedness state of NAME. */
2874 lang_update_definedness (const char *name
, struct bfd_link_hash_entry
*h
)
2876 struct lang_definedness_hash_entry
*defentry
2877 = (struct lang_definedness_hash_entry
*)
2878 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2880 /* We don't keep track of symbols not tested with DEFINED. */
2881 if (defentry
== NULL
)
2884 /* If the symbol was already defined, and not from an earlier statement
2885 iteration, don't update the definedness iteration, because that'd
2886 make the symbol seem defined in the linker script at this point, and
2887 it wasn't; it was defined in some object. If we do anyway, DEFINED
2888 would start to yield false before this point and the construct "sym =
2889 DEFINED (sym) ? sym : X;" would change sym to X despite being defined
2891 if (h
->type
!= bfd_link_hash_undefined
2892 && h
->type
!= bfd_link_hash_common
2893 && h
->type
!= bfd_link_hash_new
2894 && defentry
->iteration
== -1)
2897 defentry
->iteration
= lang_statement_iteration
;
2900 /* Add the supplied name to the symbol table as an undefined reference.
2901 This is a two step process as the symbol table doesn't even exist at
2902 the time the ld command line is processed. First we put the name
2903 on a list, then, once the output file has been opened, transfer the
2904 name to the symbol table. */
2906 typedef struct bfd_sym_chain ldlang_undef_chain_list_type
;
2908 #define ldlang_undef_chain_list_head entry_symbol.next
2911 ldlang_add_undef (const char *const name
)
2913 ldlang_undef_chain_list_type
*new =
2914 stat_alloc (sizeof (ldlang_undef_chain_list_type
));
2916 new->next
= ldlang_undef_chain_list_head
;
2917 ldlang_undef_chain_list_head
= new;
2919 new->name
= xstrdup (name
);
2921 if (output_bfd
!= NULL
)
2922 insert_undefined (new->name
);
2925 /* Insert NAME as undefined in the symbol table. */
2928 insert_undefined (const char *name
)
2930 struct bfd_link_hash_entry
*h
;
2932 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, FALSE
, TRUE
);
2934 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2935 if (h
->type
== bfd_link_hash_new
)
2937 h
->type
= bfd_link_hash_undefined
;
2938 h
->u
.undef
.abfd
= NULL
;
2939 bfd_link_add_undef (link_info
.hash
, h
);
2943 /* Run through the list of undefineds created above and place them
2944 into the linker hash table as undefined symbols belonging to the
2948 lang_place_undefineds (void)
2950 ldlang_undef_chain_list_type
*ptr
;
2952 for (ptr
= ldlang_undef_chain_list_head
; ptr
!= NULL
; ptr
= ptr
->next
)
2953 insert_undefined (ptr
->name
);
2956 /* Check for all readonly or some readwrite sections. */
2959 check_input_sections
2960 (lang_statement_union_type
*s
,
2961 lang_output_section_statement_type
*output_section_statement
)
2963 for (; s
!= (lang_statement_union_type
*) NULL
; s
= s
->header
.next
)
2965 switch (s
->header
.type
)
2967 case lang_wild_statement_enum
:
2968 walk_wild (&s
->wild_statement
, check_section_callback
,
2969 output_section_statement
);
2970 if (! output_section_statement
->all_input_readonly
)
2973 case lang_constructors_statement_enum
:
2974 check_input_sections (constructor_list
.head
,
2975 output_section_statement
);
2976 if (! output_section_statement
->all_input_readonly
)
2979 case lang_group_statement_enum
:
2980 check_input_sections (s
->group_statement
.children
.head
,
2981 output_section_statement
);
2982 if (! output_section_statement
->all_input_readonly
)
2991 /* Update wildcard statements if needed. */
2994 update_wild_statements (lang_statement_union_type
*s
)
2996 struct wildcard_list
*sec
;
2998 switch (sort_section
)
3008 for (; s
!= NULL
; s
= s
->header
.next
)
3010 switch (s
->header
.type
)
3015 case lang_wild_statement_enum
:
3016 sec
= s
->wild_statement
.section_list
;
3019 switch (sec
->spec
.sorted
)
3022 sec
->spec
.sorted
= sort_section
;
3025 if (sort_section
== by_alignment
)
3026 sec
->spec
.sorted
= by_name_alignment
;
3029 if (sort_section
== by_name
)
3030 sec
->spec
.sorted
= by_alignment_name
;
3038 case lang_constructors_statement_enum
:
3039 update_wild_statements (constructor_list
.head
);
3042 case lang_output_section_statement_enum
:
3043 update_wild_statements
3044 (s
->output_section_statement
.children
.head
);
3047 case lang_group_statement_enum
:
3048 update_wild_statements (s
->group_statement
.children
.head
);
3056 /* Open input files and attach to output sections. */
3059 map_input_to_output_sections
3060 (lang_statement_union_type
*s
, const char *target
,
3061 lang_output_section_statement_type
*os
)
3063 for (; s
!= NULL
; s
= s
->header
.next
)
3065 switch (s
->header
.type
)
3067 case lang_wild_statement_enum
:
3068 wild (&s
->wild_statement
, target
, os
);
3070 case lang_constructors_statement_enum
:
3071 map_input_to_output_sections (constructor_list
.head
,
3075 case lang_output_section_statement_enum
:
3076 if (s
->output_section_statement
.constraint
)
3078 if (s
->output_section_statement
.constraint
!= ONLY_IF_RW
3079 && s
->output_section_statement
.constraint
!= ONLY_IF_RO
)
3081 s
->output_section_statement
.all_input_readonly
= TRUE
;
3082 check_input_sections (s
->output_section_statement
.children
.head
,
3083 &s
->output_section_statement
);
3084 if ((s
->output_section_statement
.all_input_readonly
3085 && s
->output_section_statement
.constraint
== ONLY_IF_RW
)
3086 || (!s
->output_section_statement
.all_input_readonly
3087 && s
->output_section_statement
.constraint
== ONLY_IF_RO
))
3089 s
->output_section_statement
.constraint
= -1;
3094 map_input_to_output_sections (s
->output_section_statement
.children
.head
,
3096 &s
->output_section_statement
);
3098 case lang_output_statement_enum
:
3100 case lang_target_statement_enum
:
3101 target
= s
->target_statement
.target
;
3103 case lang_group_statement_enum
:
3104 map_input_to_output_sections (s
->group_statement
.children
.head
,
3108 case lang_data_statement_enum
:
3109 /* Make sure that any sections mentioned in the expression
3111 exp_init_os (s
->data_statement
.exp
);
3112 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3114 /* The output section gets contents, and then we inspect for
3115 any flags set in the input script which override any ALLOC. */
3116 os
->bfd_section
->flags
|= SEC_HAS_CONTENTS
;
3117 if (!(os
->flags
& SEC_NEVER_LOAD
))
3118 os
->bfd_section
->flags
|= SEC_ALLOC
| SEC_LOAD
;
3120 case lang_fill_statement_enum
:
3121 case lang_input_section_enum
:
3122 case lang_object_symbols_statement_enum
:
3123 case lang_reloc_statement_enum
:
3124 case lang_padding_statement_enum
:
3125 case lang_input_statement_enum
:
3126 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3129 case lang_assignment_statement_enum
:
3130 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3133 /* Make sure that any sections mentioned in the assignment
3135 exp_init_os (s
->assignment_statement
.exp
);
3137 case lang_afile_asection_pair_statement_enum
:
3140 case lang_address_statement_enum
:
3141 /* Mark the specified section with the supplied address.
3143 If this section was actually a segment marker, then the
3144 directive is ignored if the linker script explicitly
3145 processed the segment marker. Originally, the linker
3146 treated segment directives (like -Ttext on the
3147 command-line) as section directives. We honor the
3148 section directive semantics for backwards compatibilty;
3149 linker scripts that do not specifically check for
3150 SEGMENT_START automatically get the old semantics. */
3151 if (!s
->address_statement
.segment
3152 || !s
->address_statement
.segment
->used
)
3154 lang_output_section_statement_type
*aos
3155 = (lang_output_section_statement_lookup
3156 (s
->address_statement
.section_name
));
3158 if (aos
->bfd_section
== NULL
)
3159 init_os (aos
, NULL
);
3160 aos
->addr_tree
= s
->address_statement
.address
;
3167 /* An output section might have been removed after its statement was
3168 added. For example, ldemul_before_allocation can remove dynamic
3169 sections if they turn out to be not needed. Clean them up here. */
3172 strip_excluded_output_sections (void)
3174 lang_output_section_statement_type
*os
;
3176 /* Run lang_size_sections (if not already done). */
3177 if (expld
.phase
!= lang_mark_phase_enum
)
3179 expld
.phase
= lang_mark_phase_enum
;
3180 expld
.dataseg
.phase
= exp_dataseg_none
;
3181 one_lang_size_sections_pass (NULL
, FALSE
);
3182 lang_reset_memory_regions ();
3185 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
3189 asection
*output_section
;
3190 bfd_boolean exclude
;
3192 if (os
->constraint
== -1)
3195 output_section
= os
->bfd_section
;
3196 if (output_section
== NULL
)
3199 exclude
= (output_section
->rawsize
== 0
3200 && (output_section
->flags
& SEC_KEEP
) == 0
3201 && !bfd_section_removed_from_list (output_bfd
,
3204 /* Some sections have not yet been sized, notably .gnu.version,
3205 .dynsym, .dynstr and .hash. These all have SEC_LINKER_CREATED
3206 input sections, so don't drop output sections that have such
3207 input sections unless they are also marked SEC_EXCLUDE. */
3208 if (exclude
&& output_section
->map_head
.s
!= NULL
)
3212 for (s
= output_section
->map_head
.s
; s
!= NULL
; s
= s
->map_head
.s
)
3213 if ((s
->flags
& SEC_LINKER_CREATED
) != 0
3214 && (s
->flags
& SEC_EXCLUDE
) == 0)
3221 /* TODO: Don't just junk map_head.s, turn them into link_orders. */
3222 output_section
->map_head
.link_order
= NULL
;
3223 output_section
->map_tail
.link_order
= NULL
;
3227 /* We don't set bfd_section to NULL since bfd_section of the
3228 removed output section statement may still be used. */
3230 output_section
->flags
|= SEC_EXCLUDE
;
3231 bfd_section_list_remove (output_bfd
, output_section
);
3232 output_bfd
->section_count
--;
3236 /* Stop future calls to lang_add_section from messing with map_head
3237 and map_tail link_order fields. */
3238 stripped_excluded_sections
= TRUE
;
3242 print_output_section_statement
3243 (lang_output_section_statement_type
*output_section_statement
)
3245 asection
*section
= output_section_statement
->bfd_section
;
3248 if (output_section_statement
!= abs_output_section
)
3250 minfo ("\n%s", output_section_statement
->name
);
3252 if (section
!= NULL
)
3254 print_dot
= section
->vma
;
3256 len
= strlen (output_section_statement
->name
);
3257 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
3262 while (len
< SECTION_NAME_MAP_LENGTH
)
3268 minfo ("0x%V %W", section
->vma
, section
->size
);
3270 if (output_section_statement
->load_base
!= NULL
)
3274 addr
= exp_get_abs_int (output_section_statement
->load_base
, 0,
3276 minfo (_(" load address 0x%V"), addr
);
3283 print_statement_list (output_section_statement
->children
.head
,
3284 output_section_statement
);
3287 /* Scan for the use of the destination in the right hand side
3288 of an expression. In such cases we will not compute the
3289 correct expression, since the value of DST that is used on
3290 the right hand side will be its final value, not its value
3291 just before this expression is evaluated. */
3294 scan_for_self_assignment (const char * dst
, etree_type
* rhs
)
3296 if (rhs
== NULL
|| dst
== NULL
)
3299 switch (rhs
->type
.node_class
)
3302 return scan_for_self_assignment (dst
, rhs
->binary
.lhs
)
3303 || scan_for_self_assignment (dst
, rhs
->binary
.rhs
);
3306 return scan_for_self_assignment (dst
, rhs
->trinary
.lhs
)
3307 || scan_for_self_assignment (dst
, rhs
->trinary
.rhs
);
3310 case etree_provided
:
3312 if (strcmp (dst
, rhs
->assign
.dst
) == 0)
3314 return scan_for_self_assignment (dst
, rhs
->assign
.src
);
3317 return scan_for_self_assignment (dst
, rhs
->unary
.child
);
3321 return strcmp (dst
, rhs
->value
.str
) == 0;
3326 return strcmp (dst
, rhs
->name
.name
) == 0;
3338 print_assignment (lang_assignment_statement_type
*assignment
,
3339 lang_output_section_statement_type
*output_section
)
3343 bfd_boolean computation_is_valid
= TRUE
;
3346 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3349 if (assignment
->exp
->type
.node_class
== etree_assert
)
3352 tree
= assignment
->exp
->assert_s
.child
;
3353 computation_is_valid
= TRUE
;
3357 const char *dst
= assignment
->exp
->assign
.dst
;
3359 is_dot
= (dst
[0] == '.' && dst
[1] == 0);
3360 tree
= assignment
->exp
->assign
.src
;
3361 computation_is_valid
= is_dot
|| (scan_for_self_assignment (dst
, tree
) == FALSE
);
3364 exp_fold_tree (tree
, output_section
->bfd_section
, &print_dot
);
3365 if (expld
.result
.valid_p
)
3369 if (computation_is_valid
)
3371 value
= expld
.result
.value
;
3373 if (expld
.result
.section
)
3374 value
+= expld
.result
.section
->vma
;
3376 minfo ("0x%V", value
);
3382 struct bfd_link_hash_entry
*h
;
3384 h
= bfd_link_hash_lookup (link_info
.hash
, assignment
->exp
->assign
.dst
,
3385 FALSE
, FALSE
, TRUE
);
3388 value
= h
->u
.def
.value
;
3390 if (expld
.result
.section
)
3391 value
+= expld
.result
.section
->vma
;
3393 minfo ("[0x%V]", value
);
3396 minfo ("[unresolved]");
3408 exp_print_tree (assignment
->exp
);
3413 print_input_statement (lang_input_statement_type
*statm
)
3415 if (statm
->filename
!= NULL
)
3417 fprintf (config
.map_file
, "LOAD %s\n", statm
->filename
);
3421 /* Print all symbols defined in a particular section. This is called
3422 via bfd_link_hash_traverse, or by print_all_symbols. */
3425 print_one_symbol (struct bfd_link_hash_entry
*hash_entry
, void *ptr
)
3427 asection
*sec
= ptr
;
3429 if ((hash_entry
->type
== bfd_link_hash_defined
3430 || hash_entry
->type
== bfd_link_hash_defweak
)
3431 && sec
== hash_entry
->u
.def
.section
)
3435 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3438 (hash_entry
->u
.def
.value
3439 + hash_entry
->u
.def
.section
->output_offset
3440 + hash_entry
->u
.def
.section
->output_section
->vma
));
3442 minfo (" %T\n", hash_entry
->root
.string
);
3449 print_all_symbols (sec
)
3452 struct fat_user_section_struct
*ud
= get_userdata (sec
);
3453 struct map_symbol_def
*def
;
3458 *ud
->map_symbol_def_tail
= 0;
3459 for (def
= ud
->map_symbol_def_head
; def
; def
= def
->next
)
3460 print_one_symbol (def
->entry
, sec
);
3463 /* Print information about an input section to the map file. */
3466 print_input_section (lang_input_section_type
*in
)
3468 asection
*i
= in
->section
;
3469 bfd_size_type size
= i
->size
;
3478 minfo ("%s", i
->name
);
3480 len
= 1 + strlen (i
->name
);
3481 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
3486 while (len
< SECTION_NAME_MAP_LENGTH
)
3492 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3493 addr
= i
->output_section
->vma
+ i
->output_offset
;
3500 minfo ("0x%V %W %B\n", addr
, TO_ADDR (size
), i
->owner
);
3502 if (size
!= i
->rawsize
&& i
->rawsize
!= 0)
3504 len
= SECTION_NAME_MAP_LENGTH
+ 3;
3516 minfo (_("%W (size before relaxing)\n"), i
->rawsize
);
3519 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3521 if (command_line
.reduce_memory_overheads
)
3522 bfd_link_hash_traverse (link_info
.hash
, print_one_symbol
, i
);
3524 print_all_symbols (i
);
3526 print_dot
= addr
+ TO_ADDR (size
);
3532 print_fill_statement (lang_fill_statement_type
*fill
)
3536 fputs (" FILL mask 0x", config
.map_file
);
3537 for (p
= fill
->fill
->data
, size
= fill
->fill
->size
; size
!= 0; p
++, size
--)
3538 fprintf (config
.map_file
, "%02x", *p
);
3539 fputs ("\n", config
.map_file
);
3543 print_data_statement (lang_data_statement_type
*data
)
3551 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3554 addr
= data
->output_offset
;
3555 if (data
->output_section
!= NULL
)
3556 addr
+= data
->output_section
->vma
;
3584 minfo ("0x%V %W %s 0x%v", addr
, size
, name
, data
->value
);
3586 if (data
->exp
->type
.node_class
!= etree_value
)
3589 exp_print_tree (data
->exp
);
3594 print_dot
= addr
+ TO_ADDR (size
);
3597 /* Print an address statement. These are generated by options like
3601 print_address_statement (lang_address_statement_type
*address
)
3603 minfo (_("Address of section %s set to "), address
->section_name
);
3604 exp_print_tree (address
->address
);
3608 /* Print a reloc statement. */
3611 print_reloc_statement (lang_reloc_statement_type
*reloc
)
3618 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3621 addr
= reloc
->output_offset
;
3622 if (reloc
->output_section
!= NULL
)
3623 addr
+= reloc
->output_section
->vma
;
3625 size
= bfd_get_reloc_size (reloc
->howto
);
3627 minfo ("0x%V %W RELOC %s ", addr
, size
, reloc
->howto
->name
);
3629 if (reloc
->name
!= NULL
)
3630 minfo ("%s+", reloc
->name
);
3632 minfo ("%s+", reloc
->section
->name
);
3634 exp_print_tree (reloc
->addend_exp
);
3638 print_dot
= addr
+ TO_ADDR (size
);
3642 print_padding_statement (lang_padding_statement_type
*s
)
3650 len
= sizeof " *fill*" - 1;
3651 while (len
< SECTION_NAME_MAP_LENGTH
)
3657 addr
= s
->output_offset
;
3658 if (s
->output_section
!= NULL
)
3659 addr
+= s
->output_section
->vma
;
3660 minfo ("0x%V %W ", addr
, (bfd_vma
) s
->size
);
3662 if (s
->fill
->size
!= 0)
3666 for (p
= s
->fill
->data
, size
= s
->fill
->size
; size
!= 0; p
++, size
--)
3667 fprintf (config
.map_file
, "%02x", *p
);
3672 print_dot
= addr
+ TO_ADDR (s
->size
);
3676 print_wild_statement (lang_wild_statement_type
*w
,
3677 lang_output_section_statement_type
*os
)
3679 struct wildcard_list
*sec
;
3683 if (w
->filenames_sorted
)
3685 if (w
->filename
!= NULL
)
3686 minfo ("%s", w
->filename
);
3689 if (w
->filenames_sorted
)
3693 for (sec
= w
->section_list
; sec
; sec
= sec
->next
)
3695 if (sec
->spec
.sorted
)
3697 if (sec
->spec
.exclude_name_list
!= NULL
)
3700 minfo ("EXCLUDE_FILE(%s", sec
->spec
.exclude_name_list
->name
);
3701 for (tmp
= sec
->spec
.exclude_name_list
->next
; tmp
; tmp
= tmp
->next
)
3702 minfo (" %s", tmp
->name
);
3705 if (sec
->spec
.name
!= NULL
)
3706 minfo ("%s", sec
->spec
.name
);
3709 if (sec
->spec
.sorted
)
3718 print_statement_list (w
->children
.head
, os
);
3721 /* Print a group statement. */
3724 print_group (lang_group_statement_type
*s
,
3725 lang_output_section_statement_type
*os
)
3727 fprintf (config
.map_file
, "START GROUP\n");
3728 print_statement_list (s
->children
.head
, os
);
3729 fprintf (config
.map_file
, "END GROUP\n");
3732 /* Print the list of statements in S.
3733 This can be called for any statement type. */
3736 print_statement_list (lang_statement_union_type
*s
,
3737 lang_output_section_statement_type
*os
)
3741 print_statement (s
, os
);
3746 /* Print the first statement in statement list S.
3747 This can be called for any statement type. */
3750 print_statement (lang_statement_union_type
*s
,
3751 lang_output_section_statement_type
*os
)
3753 switch (s
->header
.type
)
3756 fprintf (config
.map_file
, _("Fail with %d\n"), s
->header
.type
);
3759 case lang_constructors_statement_enum
:
3760 if (constructor_list
.head
!= NULL
)
3762 if (constructors_sorted
)
3763 minfo (" SORT (CONSTRUCTORS)\n");
3765 minfo (" CONSTRUCTORS\n");
3766 print_statement_list (constructor_list
.head
, os
);
3769 case lang_wild_statement_enum
:
3770 print_wild_statement (&s
->wild_statement
, os
);
3772 case lang_address_statement_enum
:
3773 print_address_statement (&s
->address_statement
);
3775 case lang_object_symbols_statement_enum
:
3776 minfo (" CREATE_OBJECT_SYMBOLS\n");
3778 case lang_fill_statement_enum
:
3779 print_fill_statement (&s
->fill_statement
);
3781 case lang_data_statement_enum
:
3782 print_data_statement (&s
->data_statement
);
3784 case lang_reloc_statement_enum
:
3785 print_reloc_statement (&s
->reloc_statement
);
3787 case lang_input_section_enum
:
3788 print_input_section (&s
->input_section
);
3790 case lang_padding_statement_enum
:
3791 print_padding_statement (&s
->padding_statement
);
3793 case lang_output_section_statement_enum
:
3794 print_output_section_statement (&s
->output_section_statement
);
3796 case lang_assignment_statement_enum
:
3797 print_assignment (&s
->assignment_statement
, os
);
3799 case lang_target_statement_enum
:
3800 fprintf (config
.map_file
, "TARGET(%s)\n", s
->target_statement
.target
);
3802 case lang_output_statement_enum
:
3803 minfo ("OUTPUT(%s", s
->output_statement
.name
);
3804 if (output_target
!= NULL
)
3805 minfo (" %s", output_target
);
3808 case lang_input_statement_enum
:
3809 print_input_statement (&s
->input_statement
);
3811 case lang_group_statement_enum
:
3812 print_group (&s
->group_statement
, os
);
3814 case lang_afile_asection_pair_statement_enum
:
3821 print_statements (void)
3823 print_statement_list (statement_list
.head
, abs_output_section
);
3826 /* Print the first N statements in statement list S to STDERR.
3827 If N == 0, nothing is printed.
3828 If N < 0, the entire list is printed.
3829 Intended to be called from GDB. */
3832 dprint_statement (lang_statement_union_type
*s
, int n
)
3834 FILE *map_save
= config
.map_file
;
3836 config
.map_file
= stderr
;
3839 print_statement_list (s
, abs_output_section
);
3842 while (s
&& --n
>= 0)
3844 print_statement (s
, abs_output_section
);
3849 config
.map_file
= map_save
;
3853 insert_pad (lang_statement_union_type
**ptr
,
3855 unsigned int alignment_needed
,
3856 asection
*output_section
,
3859 static fill_type zero_fill
= { 1, { 0 } };
3860 lang_statement_union_type
*pad
= NULL
;
3862 if (ptr
!= &statement_list
.head
)
3863 pad
= ((lang_statement_union_type
*)
3864 ((char *) ptr
- offsetof (lang_statement_union_type
, header
.next
)));
3866 && pad
->header
.type
== lang_padding_statement_enum
3867 && pad
->padding_statement
.output_section
== output_section
)
3869 /* Use the existing pad statement. */
3871 else if ((pad
= *ptr
) != NULL
3872 && pad
->header
.type
== lang_padding_statement_enum
3873 && pad
->padding_statement
.output_section
== output_section
)
3875 /* Use the existing pad statement. */
3879 /* Make a new padding statement, linked into existing chain. */
3880 pad
= stat_alloc (sizeof (lang_padding_statement_type
));
3881 pad
->header
.next
= *ptr
;
3883 pad
->header
.type
= lang_padding_statement_enum
;
3884 pad
->padding_statement
.output_section
= output_section
;
3887 pad
->padding_statement
.fill
= fill
;
3889 pad
->padding_statement
.output_offset
= dot
- output_section
->vma
;
3890 pad
->padding_statement
.size
= alignment_needed
;
3891 output_section
->size
+= alignment_needed
;
3894 /* Work out how much this section will move the dot point. */
3898 (lang_statement_union_type
**this_ptr
,
3899 lang_output_section_statement_type
*output_section_statement
,
3903 lang_input_section_type
*is
= &((*this_ptr
)->input_section
);
3904 asection
*i
= is
->section
;
3906 if (!((lang_input_statement_type
*) i
->owner
->usrdata
)->just_syms_flag
3907 && (i
->flags
& SEC_EXCLUDE
) == 0)
3909 unsigned int alignment_needed
;
3912 /* Align this section first to the input sections requirement,
3913 then to the output section's requirement. If this alignment
3914 is greater than any seen before, then record it too. Perform
3915 the alignment by inserting a magic 'padding' statement. */
3917 if (output_section_statement
->subsection_alignment
!= -1)
3918 i
->alignment_power
= output_section_statement
->subsection_alignment
;
3920 o
= output_section_statement
->bfd_section
;
3921 if (o
->alignment_power
< i
->alignment_power
)
3922 o
->alignment_power
= i
->alignment_power
;
3924 alignment_needed
= align_power (dot
, i
->alignment_power
) - dot
;
3926 if (alignment_needed
!= 0)
3928 insert_pad (this_ptr
, fill
, TO_SIZE (alignment_needed
), o
, dot
);
3929 dot
+= alignment_needed
;
3932 /* Remember where in the output section this input section goes. */
3934 i
->output_offset
= dot
- o
->vma
;
3936 /* Mark how big the output section must be to contain this now. */
3937 dot
+= TO_ADDR (i
->size
);
3938 o
->size
= TO_SIZE (dot
- o
->vma
);
3942 i
->output_offset
= i
->vma
- output_section_statement
->bfd_section
->vma
;
3949 sort_sections_by_lma (const void *arg1
, const void *arg2
)
3951 const asection
*sec1
= *(const asection
**) arg1
;
3952 const asection
*sec2
= *(const asection
**) arg2
;
3954 if (bfd_section_lma (sec1
->owner
, sec1
)
3955 < bfd_section_lma (sec2
->owner
, sec2
))
3957 else if (bfd_section_lma (sec1
->owner
, sec1
)
3958 > bfd_section_lma (sec2
->owner
, sec2
))
3964 #define IGNORE_SECTION(s) \
3965 ((s->flags & SEC_NEVER_LOAD) != 0 \
3966 || (s->flags & SEC_ALLOC) == 0 \
3967 || ((s->flags & SEC_THREAD_LOCAL) != 0 \
3968 && (s->flags & SEC_LOAD) == 0))
3970 /* Check to see if any allocated sections overlap with other allocated
3971 sections. This can happen if a linker script specifies the output
3972 section addresses of the two sections. */
3975 lang_check_section_addresses (void)
3978 asection
**sections
, **spp
;
3986 if (bfd_count_sections (output_bfd
) <= 1)
3989 amt
= bfd_count_sections (output_bfd
) * sizeof (asection
*);
3990 sections
= xmalloc (amt
);
3992 /* Scan all sections in the output list. */
3994 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
3996 /* Only consider loadable sections with real contents. */
3997 if (IGNORE_SECTION (s
) || s
->size
== 0)
4000 sections
[count
] = s
;
4007 qsort (sections
, (size_t) count
, sizeof (asection
*),
4008 sort_sections_by_lma
);
4012 s_start
= bfd_section_lma (output_bfd
, s
);
4013 s_end
= s_start
+ TO_ADDR (s
->size
) - 1;
4014 for (count
--; count
; count
--)
4016 /* We must check the sections' LMA addresses not their VMA
4017 addresses because overlay sections can have overlapping VMAs
4018 but they must have distinct LMAs. */
4023 s_start
= bfd_section_lma (output_bfd
, s
);
4024 s_end
= s_start
+ TO_ADDR (s
->size
) - 1;
4026 /* Look for an overlap. */
4027 if (s_end
>= os_start
&& s_start
<= os_end
)
4028 einfo (_("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
4029 s
->name
, s_start
, s_end
, os
->name
, os_start
, os_end
);
4035 /* Make sure the new address is within the region. We explicitly permit the
4036 current address to be at the exact end of the region when the address is
4037 non-zero, in case the region is at the end of addressable memory and the
4038 calculation wraps around. */
4041 os_region_check (lang_output_section_statement_type
*os
,
4042 lang_memory_region_type
*region
,
4046 if ((region
->current
< region
->origin
4047 || (region
->current
- region
->origin
> region
->length
))
4048 && ((region
->current
!= region
->origin
+ region
->length
)
4053 einfo (_("%X%P: address 0x%v of %B section %s"
4054 " is not within region %s\n"),
4056 os
->bfd_section
->owner
,
4057 os
->bfd_section
->name
,
4062 einfo (_("%X%P: region %s is full (%B section %s)\n"),
4064 os
->bfd_section
->owner
,
4065 os
->bfd_section
->name
);
4067 /* Reset the region pointer. */
4068 region
->current
= region
->origin
;
4072 /* Set the sizes for all the output sections. */
4075 lang_size_sections_1
4076 (lang_statement_union_type
*s
,
4077 lang_output_section_statement_type
*output_section_statement
,
4078 lang_statement_union_type
**prev
,
4082 bfd_boolean check_regions
)
4084 /* Size up the sections from their constituent parts. */
4085 for (; s
!= NULL
; s
= s
->header
.next
)
4087 switch (s
->header
.type
)
4089 case lang_output_section_statement_enum
:
4091 bfd_vma newdot
, after
;
4092 lang_output_section_statement_type
*os
;
4094 os
= &s
->output_section_statement
;
4095 if (os
->addr_tree
!= NULL
)
4097 os
->processed
= FALSE
;
4098 exp_fold_tree (os
->addr_tree
, bfd_abs_section_ptr
, &dot
);
4100 if (!expld
.result
.valid_p
4101 && expld
.phase
!= lang_mark_phase_enum
)
4102 einfo (_("%F%S: non constant or forward reference"
4103 " address expression for section %s\n"),
4106 dot
= expld
.result
.value
+ expld
.result
.section
->vma
;
4109 if (os
->bfd_section
== NULL
)
4110 /* This section was removed or never actually created. */
4113 /* If this is a COFF shared library section, use the size and
4114 address from the input section. FIXME: This is COFF
4115 specific; it would be cleaner if there were some other way
4116 to do this, but nothing simple comes to mind. */
4117 if ((bfd_get_flavour (output_bfd
) == bfd_target_ecoff_flavour
4118 || bfd_get_flavour (output_bfd
) == bfd_target_coff_flavour
)
4119 && (os
->bfd_section
->flags
& SEC_COFF_SHARED_LIBRARY
) != 0)
4123 if (os
->children
.head
== NULL
4124 || os
->children
.head
->header
.next
!= NULL
4125 || (os
->children
.head
->header
.type
4126 != lang_input_section_enum
))
4127 einfo (_("%P%X: Internal error on COFF shared library"
4128 " section %s\n"), os
->name
);
4130 input
= os
->children
.head
->input_section
.section
;
4131 bfd_set_section_vma (os
->bfd_section
->owner
,
4133 bfd_section_vma (input
->owner
, input
));
4134 os
->bfd_section
->size
= input
->size
;
4139 if (bfd_is_abs_section (os
->bfd_section
))
4141 /* No matter what happens, an abs section starts at zero. */
4142 ASSERT (os
->bfd_section
->vma
== 0);
4148 if (os
->addr_tree
== NULL
)
4150 /* No address specified for this section, get one
4151 from the region specification. */
4152 if (os
->region
== NULL
4153 || ((os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))
4154 && os
->region
->name
[0] == '*'
4155 && strcmp (os
->region
->name
,
4156 DEFAULT_MEMORY_REGION
) == 0))
4158 os
->region
= lang_memory_default (os
->bfd_section
);
4161 /* If a loadable section is using the default memory
4162 region, and some non default memory regions were
4163 defined, issue an error message. */
4164 if (!IGNORE_SECTION (os
->bfd_section
)
4165 && ! link_info
.relocatable
4167 && strcmp (os
->region
->name
,
4168 DEFAULT_MEMORY_REGION
) == 0
4169 && lang_memory_region_list
!= NULL
4170 && (strcmp (lang_memory_region_list
->name
,
4171 DEFAULT_MEMORY_REGION
) != 0
4172 || lang_memory_region_list
->next
!= NULL
)
4173 && expld
.phase
!= lang_mark_phase_enum
)
4175 /* By default this is an error rather than just a
4176 warning because if we allocate the section to the
4177 default memory region we can end up creating an
4178 excessively large binary, or even seg faulting when
4179 attempting to perform a negative seek. See
4180 sources.redhat.com/ml/binutils/2003-04/msg00423.html
4181 for an example of this. This behaviour can be
4182 overridden by the using the --no-check-sections
4184 if (command_line
.check_section_addresses
)
4185 einfo (_("%P%F: error: no memory region specified"
4186 " for loadable section `%s'\n"),
4187 bfd_get_section_name (output_bfd
,
4190 einfo (_("%P: warning: no memory region specified"
4191 " for loadable section `%s'\n"),
4192 bfd_get_section_name (output_bfd
,
4196 newdot
= os
->region
->current
;
4197 align
= os
->bfd_section
->alignment_power
;
4200 align
= os
->section_alignment
;
4202 /* Align to what the section needs. */
4205 bfd_vma savedot
= newdot
;
4206 newdot
= align_power (newdot
, align
);
4208 if (newdot
!= savedot
4209 && (config
.warn_section_align
4210 || os
->addr_tree
!= NULL
)
4211 && expld
.phase
!= lang_mark_phase_enum
)
4212 einfo (_("%P: warning: changing start of section"
4213 " %s by %lu bytes\n"),
4214 os
->name
, (unsigned long) (newdot
- savedot
));
4217 bfd_set_section_vma (0, os
->bfd_section
, newdot
);
4219 os
->bfd_section
->output_offset
= 0;
4222 lang_size_sections_1 (os
->children
.head
, os
, &os
->children
.head
,
4223 os
->fill
, newdot
, relax
, check_regions
);
4225 os
->processed
= TRUE
;
4227 if (bfd_is_abs_section (os
->bfd_section
) || os
->ignored
)
4229 ASSERT (os
->bfd_section
->size
== 0);
4233 dot
= os
->bfd_section
->vma
;
4235 /* Put the section within the requested block size, or
4236 align at the block boundary. */
4238 + TO_ADDR (os
->bfd_section
->size
)
4239 + os
->block_value
- 1)
4240 & - (bfd_vma
) os
->block_value
);
4242 os
->bfd_section
->size
= TO_SIZE (after
- os
->bfd_section
->vma
);
4244 /* .tbss sections effectively have zero size. */
4245 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
4246 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
4247 || link_info
.relocatable
)
4248 dot
+= TO_ADDR (os
->bfd_section
->size
);
4250 if (os
->update_dot_tree
!= 0)
4251 exp_fold_tree (os
->update_dot_tree
, bfd_abs_section_ptr
, &dot
);
4253 /* Update dot in the region ?
4254 We only do this if the section is going to be allocated,
4255 since unallocated sections do not contribute to the region's
4256 overall size in memory.
4258 If the SEC_NEVER_LOAD bit is not set, it will affect the
4259 addresses of sections after it. We have to update
4261 if (os
->region
!= NULL
4262 && ((os
->bfd_section
->flags
& SEC_NEVER_LOAD
) == 0
4263 || (os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))))
4265 os
->region
->current
= dot
;
4268 /* Make sure the new address is within the region. */
4269 os_region_check (os
, os
->region
, os
->addr_tree
,
4270 os
->bfd_section
->vma
);
4272 /* If there's no load address specified, use the run
4273 region as the load region. */
4274 if (os
->lma_region
== NULL
&& os
->load_base
== NULL
)
4275 os
->lma_region
= os
->region
;
4277 if (os
->lma_region
!= NULL
&& os
->lma_region
!= os
->region
)
4279 /* Set load_base, which will be handled later. */
4280 os
->load_base
= exp_intop (os
->lma_region
->current
);
4281 os
->lma_region
->current
+=
4282 TO_ADDR (os
->bfd_section
->size
);
4284 os_region_check (os
, os
->lma_region
, NULL
,
4285 os
->bfd_section
->lma
);
4291 case lang_constructors_statement_enum
:
4292 dot
= lang_size_sections_1 (constructor_list
.head
,
4293 output_section_statement
,
4294 &s
->wild_statement
.children
.head
,
4295 fill
, dot
, relax
, check_regions
);
4298 case lang_data_statement_enum
:
4300 unsigned int size
= 0;
4302 s
->data_statement
.output_offset
=
4303 dot
- output_section_statement
->bfd_section
->vma
;
4304 s
->data_statement
.output_section
=
4305 output_section_statement
->bfd_section
;
4307 /* We might refer to provided symbols in the expression, and
4308 need to mark them as needed. */
4309 exp_fold_tree (s
->data_statement
.exp
, bfd_abs_section_ptr
, &dot
);
4311 switch (s
->data_statement
.type
)
4329 if (size
< TO_SIZE ((unsigned) 1))
4330 size
= TO_SIZE ((unsigned) 1);
4331 dot
+= TO_ADDR (size
);
4332 output_section_statement
->bfd_section
->size
+= size
;
4336 case lang_reloc_statement_enum
:
4340 s
->reloc_statement
.output_offset
=
4341 dot
- output_section_statement
->bfd_section
->vma
;
4342 s
->reloc_statement
.output_section
=
4343 output_section_statement
->bfd_section
;
4344 size
= bfd_get_reloc_size (s
->reloc_statement
.howto
);
4345 dot
+= TO_ADDR (size
);
4346 output_section_statement
->bfd_section
->size
+= size
;
4350 case lang_wild_statement_enum
:
4351 dot
= lang_size_sections_1 (s
->wild_statement
.children
.head
,
4352 output_section_statement
,
4353 &s
->wild_statement
.children
.head
,
4354 fill
, dot
, relax
, check_regions
);
4357 case lang_object_symbols_statement_enum
:
4358 link_info
.create_object_symbols_section
=
4359 output_section_statement
->bfd_section
;
4362 case lang_output_statement_enum
:
4363 case lang_target_statement_enum
:
4366 case lang_input_section_enum
:
4370 i
= (*prev
)->input_section
.section
;
4375 if (! bfd_relax_section (i
->owner
, i
, &link_info
, &again
))
4376 einfo (_("%P%F: can't relax section: %E\n"));
4380 dot
= size_input_section (prev
, output_section_statement
,
4381 output_section_statement
->fill
, dot
);
4385 case lang_input_statement_enum
:
4388 case lang_fill_statement_enum
:
4389 s
->fill_statement
.output_section
=
4390 output_section_statement
->bfd_section
;
4392 fill
= s
->fill_statement
.fill
;
4395 case lang_assignment_statement_enum
:
4397 bfd_vma newdot
= dot
;
4399 exp_fold_tree (s
->assignment_statement
.exp
,
4400 output_section_statement
->bfd_section
,
4403 if (newdot
!= dot
&& !output_section_statement
->ignored
)
4405 if (output_section_statement
== abs_output_section
)
4407 /* If we don't have an output section, then just adjust
4408 the default memory address. */
4409 lang_memory_region_lookup (DEFAULT_MEMORY_REGION
,
4410 FALSE
)->current
= newdot
;
4414 /* Insert a pad after this statement. We can't
4415 put the pad before when relaxing, in case the
4416 assignment references dot. */
4417 insert_pad (&s
->header
.next
, fill
, TO_SIZE (newdot
- dot
),
4418 output_section_statement
->bfd_section
, dot
);
4420 /* Don't neuter the pad below when relaxing. */
4423 /* If dot is advanced, this implies that the section
4424 should have space allocated to it, unless the
4425 user has explicitly stated that the section
4426 should never be loaded. */
4427 if (!(output_section_statement
->flags
4428 & (SEC_NEVER_LOAD
| SEC_ALLOC
)))
4429 output_section_statement
->bfd_section
->flags
|= SEC_ALLOC
;
4436 case lang_padding_statement_enum
:
4437 /* If this is the first time lang_size_sections is called,
4438 we won't have any padding statements. If this is the
4439 second or later passes when relaxing, we should allow
4440 padding to shrink. If padding is needed on this pass, it
4441 will be added back in. */
4442 s
->padding_statement
.size
= 0;
4444 /* Make sure output_offset is valid. If relaxation shrinks
4445 the section and this pad isn't needed, it's possible to
4446 have output_offset larger than the final size of the
4447 section. bfd_set_section_contents will complain even for
4448 a pad size of zero. */
4449 s
->padding_statement
.output_offset
4450 = dot
- output_section_statement
->bfd_section
->vma
;
4453 case lang_group_statement_enum
:
4454 dot
= lang_size_sections_1 (s
->group_statement
.children
.head
,
4455 output_section_statement
,
4456 &s
->group_statement
.children
.head
,
4457 fill
, dot
, relax
, check_regions
);
4464 /* We can only get here when relaxing is turned on. */
4465 case lang_address_statement_enum
:
4468 prev
= &s
->header
.next
;
4474 one_lang_size_sections_pass (bfd_boolean
*relax
, bfd_boolean check_regions
)
4476 lang_statement_iteration
++;
4477 lang_size_sections_1 (statement_list
.head
, abs_output_section
,
4478 &statement_list
.head
, 0, 0, relax
, check_regions
);
4482 lang_size_sections (bfd_boolean
*relax
, bfd_boolean check_regions
)
4484 expld
.phase
= lang_allocating_phase_enum
;
4485 expld
.dataseg
.phase
= exp_dataseg_none
;
4487 one_lang_size_sections_pass (relax
, check_regions
);
4488 if (expld
.dataseg
.phase
== exp_dataseg_end_seen
4489 && link_info
.relro
&& expld
.dataseg
.relro_end
)
4491 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END pair was seen, try
4492 to put expld.dataseg.relro on a (common) page boundary. */
4493 bfd_vma old_min_base
, relro_end
, maxpage
;
4495 expld
.dataseg
.phase
= exp_dataseg_relro_adjust
;
4496 old_min_base
= expld
.dataseg
.min_base
;
4497 maxpage
= expld
.dataseg
.maxpagesize
;
4498 expld
.dataseg
.base
+= (-expld
.dataseg
.relro_end
4499 & (expld
.dataseg
.pagesize
- 1));
4500 /* Compute the expected PT_GNU_RELRO segment end. */
4501 relro_end
= (expld
.dataseg
.relro_end
+ expld
.dataseg
.pagesize
- 1)
4502 & ~(expld
.dataseg
.pagesize
- 1);
4503 if (old_min_base
+ maxpage
< expld
.dataseg
.base
)
4505 expld
.dataseg
.base
-= maxpage
;
4506 relro_end
-= maxpage
;
4508 one_lang_size_sections_pass (relax
, check_regions
);
4509 if (expld
.dataseg
.relro_end
> relro_end
)
4511 /* The alignment of sections between DATA_SEGMENT_ALIGN
4512 and DATA_SEGMENT_RELRO_END caused huge padding to be
4513 inserted at DATA_SEGMENT_RELRO_END. Try some other base. */
4515 unsigned int max_alignment_power
= 0;
4517 /* Find maximum alignment power of sections between
4518 DATA_SEGMENT_ALIGN and DATA_SEGMENT_RELRO_END. */
4519 for (sec
= output_bfd
->sections
; sec
; sec
= sec
->next
)
4520 if (sec
->vma
>= expld
.dataseg
.base
4521 && sec
->vma
< expld
.dataseg
.relro_end
4522 && sec
->alignment_power
> max_alignment_power
)
4523 max_alignment_power
= sec
->alignment_power
;
4525 if (((bfd_vma
) 1 << max_alignment_power
) < expld
.dataseg
.pagesize
)
4527 if (expld
.dataseg
.base
- (1 << max_alignment_power
)
4529 expld
.dataseg
.base
+= expld
.dataseg
.pagesize
;
4530 expld
.dataseg
.base
-= (1 << max_alignment_power
);
4531 one_lang_size_sections_pass (relax
, check_regions
);
4534 link_info
.relro_start
= expld
.dataseg
.base
;
4535 link_info
.relro_end
= expld
.dataseg
.relro_end
;
4537 else if (expld
.dataseg
.phase
== exp_dataseg_end_seen
)
4539 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether
4540 a page could be saved in the data segment. */
4541 bfd_vma first
, last
;
4543 first
= -expld
.dataseg
.base
& (expld
.dataseg
.pagesize
- 1);
4544 last
= expld
.dataseg
.end
& (expld
.dataseg
.pagesize
- 1);
4546 && ((expld
.dataseg
.base
& ~(expld
.dataseg
.pagesize
- 1))
4547 != (expld
.dataseg
.end
& ~(expld
.dataseg
.pagesize
- 1)))
4548 && first
+ last
<= expld
.dataseg
.pagesize
)
4550 expld
.dataseg
.phase
= exp_dataseg_adjust
;
4551 one_lang_size_sections_pass (relax
, check_regions
);
4555 expld
.phase
= lang_final_phase_enum
;
4558 /* Worker function for lang_do_assignments. Recursiveness goes here. */
4561 lang_do_assignments_1
4562 (lang_statement_union_type
*s
,
4563 lang_output_section_statement_type
*output_section_statement
,
4567 for (; s
!= NULL
; s
= s
->header
.next
)
4569 switch (s
->header
.type
)
4571 case lang_constructors_statement_enum
:
4572 dot
= lang_do_assignments_1 (constructor_list
.head
,
4573 output_section_statement
,
4578 case lang_output_section_statement_enum
:
4580 lang_output_section_statement_type
*os
;
4582 os
= &(s
->output_section_statement
);
4583 if (os
->bfd_section
!= NULL
&& !os
->ignored
)
4585 dot
= os
->bfd_section
->vma
;
4586 lang_do_assignments_1 (os
->children
.head
, os
, os
->fill
, dot
);
4587 /* .tbss sections effectively have zero size. */
4588 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
4589 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
4590 || link_info
.relocatable
)
4591 dot
+= TO_ADDR (os
->bfd_section
->size
);
4595 /* If nothing has been placed into the output section then
4596 it won't have a bfd_section. */
4597 if (os
->bfd_section
&& !os
->ignored
)
4599 os
->bfd_section
->lma
4600 = exp_get_abs_int (os
->load_base
, 0, "load base");
4606 case lang_wild_statement_enum
:
4608 dot
= lang_do_assignments_1 (s
->wild_statement
.children
.head
,
4609 output_section_statement
,
4613 case lang_object_symbols_statement_enum
:
4614 case lang_output_statement_enum
:
4615 case lang_target_statement_enum
:
4618 case lang_data_statement_enum
:
4619 exp_fold_tree (s
->data_statement
.exp
, bfd_abs_section_ptr
, &dot
);
4620 if (expld
.result
.valid_p
)
4621 s
->data_statement
.value
= (expld
.result
.value
4622 + expld
.result
.section
->vma
);
4624 einfo (_("%F%P: invalid data statement\n"));
4627 switch (s
->data_statement
.type
)
4645 if (size
< TO_SIZE ((unsigned) 1))
4646 size
= TO_SIZE ((unsigned) 1);
4647 dot
+= TO_ADDR (size
);
4651 case lang_reloc_statement_enum
:
4652 exp_fold_tree (s
->reloc_statement
.addend_exp
,
4653 bfd_abs_section_ptr
, &dot
);
4654 if (expld
.result
.valid_p
)
4655 s
->reloc_statement
.addend_value
= expld
.result
.value
;
4657 einfo (_("%F%P: invalid reloc statement\n"));
4658 dot
+= TO_ADDR (bfd_get_reloc_size (s
->reloc_statement
.howto
));
4661 case lang_input_section_enum
:
4663 asection
*in
= s
->input_section
.section
;
4665 if ((in
->flags
& SEC_EXCLUDE
) == 0)
4666 dot
+= TO_ADDR (in
->size
);
4670 case lang_input_statement_enum
:
4673 case lang_fill_statement_enum
:
4674 fill
= s
->fill_statement
.fill
;
4677 case lang_assignment_statement_enum
:
4678 exp_fold_tree (s
->assignment_statement
.exp
,
4679 output_section_statement
->bfd_section
,
4683 case lang_padding_statement_enum
:
4684 dot
+= TO_ADDR (s
->padding_statement
.size
);
4687 case lang_group_statement_enum
:
4688 dot
= lang_do_assignments_1 (s
->group_statement
.children
.head
,
4689 output_section_statement
,
4697 case lang_address_statement_enum
:
4705 lang_do_assignments (void)
4707 lang_statement_iteration
++;
4708 lang_do_assignments_1 (statement_list
.head
, abs_output_section
, NULL
, 0);
4711 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
4712 operator .startof. (section_name), it produces an undefined symbol
4713 .startof.section_name. Similarly, when it sees
4714 .sizeof. (section_name), it produces an undefined symbol
4715 .sizeof.section_name. For all the output sections, we look for
4716 such symbols, and set them to the correct value. */
4719 lang_set_startof (void)
4723 if (link_info
.relocatable
)
4726 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
4728 const char *secname
;
4730 struct bfd_link_hash_entry
*h
;
4732 secname
= bfd_get_section_name (output_bfd
, s
);
4733 buf
= xmalloc (10 + strlen (secname
));
4735 sprintf (buf
, ".startof.%s", secname
);
4736 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
4737 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
4739 h
->type
= bfd_link_hash_defined
;
4740 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, s
);
4741 h
->u
.def
.section
= bfd_abs_section_ptr
;
4744 sprintf (buf
, ".sizeof.%s", secname
);
4745 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
4746 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
4748 h
->type
= bfd_link_hash_defined
;
4749 h
->u
.def
.value
= TO_ADDR (s
->size
);
4750 h
->u
.def
.section
= bfd_abs_section_ptr
;
4760 struct bfd_link_hash_entry
*h
;
4763 if (link_info
.relocatable
|| link_info
.shared
)
4768 if (entry_symbol
.name
== NULL
)
4770 /* No entry has been specified. Look for the default entry, but
4771 don't warn if we don't find it. */
4772 entry_symbol
.name
= entry_symbol_default
;
4776 h
= bfd_link_hash_lookup (link_info
.hash
, entry_symbol
.name
,
4777 FALSE
, FALSE
, TRUE
);
4779 && (h
->type
== bfd_link_hash_defined
4780 || h
->type
== bfd_link_hash_defweak
)
4781 && h
->u
.def
.section
->output_section
!= NULL
)
4785 val
= (h
->u
.def
.value
4786 + bfd_get_section_vma (output_bfd
,
4787 h
->u
.def
.section
->output_section
)
4788 + h
->u
.def
.section
->output_offset
);
4789 if (! bfd_set_start_address (output_bfd
, val
))
4790 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol
.name
);
4797 /* We couldn't find the entry symbol. Try parsing it as a
4799 val
= bfd_scan_vma (entry_symbol
.name
, &send
, 0);
4802 if (! bfd_set_start_address (output_bfd
, val
))
4803 einfo (_("%P%F: can't set start address\n"));
4809 /* Can't find the entry symbol, and it's not a number. Use
4810 the first address in the text section. */
4811 ts
= bfd_get_section_by_name (output_bfd
, entry_section
);
4815 einfo (_("%P: warning: cannot find entry symbol %s;"
4816 " defaulting to %V\n"),
4818 bfd_get_section_vma (output_bfd
, ts
));
4819 if (! bfd_set_start_address (output_bfd
,
4820 bfd_get_section_vma (output_bfd
,
4822 einfo (_("%P%F: can't set start address\n"));
4827 einfo (_("%P: warning: cannot find entry symbol %s;"
4828 " not setting start address\n"),
4834 /* Don't bfd_hash_table_free (&lang_definedness_table);
4835 map file output may result in a call of lang_track_definedness. */
4838 /* This is a small function used when we want to ignore errors from
4842 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED
, ...)
4844 /* Don't do anything. */
4847 /* Check that the architecture of all the input files is compatible
4848 with the output file. Also call the backend to let it do any
4849 other checking that is needed. */
4854 lang_statement_union_type
*file
;
4856 const bfd_arch_info_type
*compatible
;
4858 for (file
= file_chain
.head
; file
!= NULL
; file
= file
->input_statement
.next
)
4860 input_bfd
= file
->input_statement
.the_bfd
;
4862 = bfd_arch_get_compatible (input_bfd
, output_bfd
,
4863 command_line
.accept_unknown_input_arch
);
4865 /* In general it is not possible to perform a relocatable
4866 link between differing object formats when the input
4867 file has relocations, because the relocations in the
4868 input format may not have equivalent representations in
4869 the output format (and besides BFD does not translate
4870 relocs for other link purposes than a final link). */
4871 if ((link_info
.relocatable
|| link_info
.emitrelocations
)
4872 && (compatible
== NULL
4873 || bfd_get_flavour (input_bfd
) != bfd_get_flavour (output_bfd
))
4874 && (bfd_get_file_flags (input_bfd
) & HAS_RELOC
) != 0)
4876 einfo (_("%P%F: Relocatable linking with relocations from"
4877 " format %s (%B) to format %s (%B) is not supported\n"),
4878 bfd_get_target (input_bfd
), input_bfd
,
4879 bfd_get_target (output_bfd
), output_bfd
);
4880 /* einfo with %F exits. */
4883 if (compatible
== NULL
)
4885 if (command_line
.warn_mismatch
)
4886 einfo (_("%P: warning: %s architecture of input file `%B'"
4887 " is incompatible with %s output\n"),
4888 bfd_printable_name (input_bfd
), input_bfd
,
4889 bfd_printable_name (output_bfd
));
4891 else if (bfd_count_sections (input_bfd
))
4893 /* If the input bfd has no contents, it shouldn't set the
4894 private data of the output bfd. */
4896 bfd_error_handler_type pfn
= NULL
;
4898 /* If we aren't supposed to warn about mismatched input
4899 files, temporarily set the BFD error handler to a
4900 function which will do nothing. We still want to call
4901 bfd_merge_private_bfd_data, since it may set up
4902 information which is needed in the output file. */
4903 if (! command_line
.warn_mismatch
)
4904 pfn
= bfd_set_error_handler (ignore_bfd_errors
);
4905 if (! bfd_merge_private_bfd_data (input_bfd
, output_bfd
))
4907 if (command_line
.warn_mismatch
)
4908 einfo (_("%P%X: failed to merge target specific data"
4909 " of file %B\n"), input_bfd
);
4911 if (! command_line
.warn_mismatch
)
4912 bfd_set_error_handler (pfn
);
4917 /* Look through all the global common symbols and attach them to the
4918 correct section. The -sort-common command line switch may be used
4919 to roughly sort the entries by size. */
4924 if (command_line
.inhibit_common_definition
)
4926 if (link_info
.relocatable
4927 && ! command_line
.force_common_definition
)
4930 if (! config
.sort_common
)
4931 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, NULL
);
4936 for (power
= 4; power
>= 0; power
--)
4937 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, &power
);
4941 /* Place one common symbol in the correct section. */
4944 lang_one_common (struct bfd_link_hash_entry
*h
, void *info
)
4946 unsigned int power_of_two
;
4950 if (h
->type
!= bfd_link_hash_common
)
4954 power_of_two
= h
->u
.c
.p
->alignment_power
;
4956 if (config
.sort_common
4957 && power_of_two
< (unsigned int) *(int *) info
)
4960 section
= h
->u
.c
.p
->section
;
4962 /* Increase the size of the section to align the common sym. */
4963 section
->size
+= ((bfd_vma
) 1 << (power_of_two
+ opb_shift
)) - 1;
4964 section
->size
&= (- (bfd_vma
) 1 << (power_of_two
+ opb_shift
));
4966 /* Adjust the alignment if necessary. */
4967 if (power_of_two
> section
->alignment_power
)
4968 section
->alignment_power
= power_of_two
;
4970 /* Change the symbol from common to defined. */
4971 h
->type
= bfd_link_hash_defined
;
4972 h
->u
.def
.section
= section
;
4973 h
->u
.def
.value
= section
->size
;
4975 /* Increase the size of the section. */
4976 section
->size
+= size
;
4978 /* Make sure the section is allocated in memory, and make sure that
4979 it is no longer a common section. */
4980 section
->flags
|= SEC_ALLOC
;
4981 section
->flags
&= ~SEC_IS_COMMON
;
4983 if (config
.map_file
!= NULL
)
4985 static bfd_boolean header_printed
;
4990 if (! header_printed
)
4992 minfo (_("\nAllocating common symbols\n"));
4993 minfo (_("Common symbol size file\n\n"));
4994 header_printed
= TRUE
;
4997 name
= demangle (h
->root
.string
);
4999 len
= strlen (name
);
5014 if (size
<= 0xffffffff)
5015 sprintf (buf
, "%lx", (unsigned long) size
);
5017 sprintf_vma (buf
, size
);
5027 minfo ("%B\n", section
->owner
);
5033 /* Run through the input files and ensure that every input section has
5034 somewhere to go. If one is found without a destination then create
5035 an input request and place it into the statement tree. */
5038 lang_place_orphans (void)
5040 LANG_FOR_EACH_INPUT_STATEMENT (file
)
5044 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
5046 if (s
->output_section
== NULL
)
5048 /* This section of the file is not attached, root
5049 around for a sensible place for it to go. */
5051 if (file
->just_syms_flag
)
5052 bfd_link_just_syms (file
->the_bfd
, s
, &link_info
);
5053 else if ((s
->flags
& SEC_EXCLUDE
) != 0)
5054 s
->output_section
= bfd_abs_section_ptr
;
5055 else if (strcmp (s
->name
, "COMMON") == 0)
5057 /* This is a lonely common section which must have
5058 come from an archive. We attach to the section
5059 with the wildcard. */
5060 if (! link_info
.relocatable
5061 || command_line
.force_common_definition
)
5063 if (default_common_section
== NULL
)
5065 default_common_section
=
5066 lang_output_section_statement_lookup (".bss");
5069 lang_add_section (&default_common_section
->children
, s
,
5070 default_common_section
);
5073 else if (ldemul_place_orphan (s
))
5077 lang_output_section_statement_type
*os
;
5079 os
= lang_output_section_statement_lookup (s
->name
);
5080 lang_add_section (&os
->children
, s
, os
);
5088 lang_set_flags (lang_memory_region_type
*ptr
, const char *flags
, int invert
)
5090 flagword
*ptr_flags
;
5092 ptr_flags
= invert
? &ptr
->not_flags
: &ptr
->flags
;
5098 *ptr_flags
|= SEC_ALLOC
;
5102 *ptr_flags
|= SEC_READONLY
;
5106 *ptr_flags
|= SEC_DATA
;
5110 *ptr_flags
|= SEC_CODE
;
5115 *ptr_flags
|= SEC_LOAD
;
5119 einfo (_("%P%F: invalid syntax in flags\n"));
5126 /* Call a function on each input file. This function will be called
5127 on an archive, but not on the elements. */
5130 lang_for_each_input_file (void (*func
) (lang_input_statement_type
*))
5132 lang_input_statement_type
*f
;
5134 for (f
= (lang_input_statement_type
*) input_file_chain
.head
;
5136 f
= (lang_input_statement_type
*) f
->next_real_file
)
5140 /* Call a function on each file. The function will be called on all
5141 the elements of an archive which are included in the link, but will
5142 not be called on the archive file itself. */
5145 lang_for_each_file (void (*func
) (lang_input_statement_type
*))
5147 LANG_FOR_EACH_INPUT_STATEMENT (f
)
5154 ldlang_add_file (lang_input_statement_type
*entry
)
5158 lang_statement_append (&file_chain
,
5159 (lang_statement_union_type
*) entry
,
5162 /* The BFD linker needs to have a list of all input BFDs involved in
5164 ASSERT (entry
->the_bfd
->link_next
== NULL
);
5165 ASSERT (entry
->the_bfd
!= output_bfd
);
5166 for (pp
= &link_info
.input_bfds
; *pp
!= NULL
; pp
= &(*pp
)->link_next
)
5168 *pp
= entry
->the_bfd
;
5169 entry
->the_bfd
->usrdata
= entry
;
5170 bfd_set_gp_size (entry
->the_bfd
, g_switch_value
);
5172 /* Look through the sections and check for any which should not be
5173 included in the link. We need to do this now, so that we can
5174 notice when the backend linker tries to report multiple
5175 definition errors for symbols which are in sections we aren't
5176 going to link. FIXME: It might be better to entirely ignore
5177 symbols which are defined in sections which are going to be
5178 discarded. This would require modifying the backend linker for
5179 each backend which might set the SEC_LINK_ONCE flag. If we do
5180 this, we should probably handle SEC_EXCLUDE in the same way. */
5182 bfd_map_over_sections (entry
->the_bfd
, section_already_linked
, entry
);
5186 lang_add_output (const char *name
, int from_script
)
5188 /* Make -o on command line override OUTPUT in script. */
5189 if (!had_output_filename
|| !from_script
)
5191 output_filename
= name
;
5192 had_output_filename
= TRUE
;
5196 static lang_output_section_statement_type
*current_section
;
5207 for (l
= 0; l
< 32; l
++)
5209 if (i
>= (unsigned int) x
)
5217 lang_output_section_statement_type
*
5218 lang_enter_output_section_statement (const char *output_section_statement_name
,
5219 etree_type
*address_exp
,
5220 enum section_type sectype
,
5222 etree_type
*subalign
,
5226 lang_output_section_statement_type
*os
;
5228 os
= lang_output_section_statement_lookup_1 (output_section_statement_name
,
5230 current_section
= os
;
5232 /* Make next things chain into subchain of this. */
5234 if (os
->addr_tree
== NULL
)
5236 os
->addr_tree
= address_exp
;
5238 os
->sectype
= sectype
;
5239 if (sectype
!= noload_section
)
5240 os
->flags
= SEC_NO_FLAGS
;
5242 os
->flags
= SEC_NEVER_LOAD
;
5243 os
->block_value
= 1;
5244 stat_ptr
= &os
->children
;
5246 os
->subsection_alignment
=
5247 topower (exp_get_value_int (subalign
, -1, "subsection alignment"));
5248 os
->section_alignment
=
5249 topower (exp_get_value_int (align
, -1, "section alignment"));
5251 os
->load_base
= ebase
;
5258 lang_output_statement_type
*new;
5260 new = new_stat (lang_output_statement
, stat_ptr
);
5261 new->name
= output_filename
;
5264 /* Reset the current counters in the regions. */
5267 lang_reset_memory_regions (void)
5269 lang_memory_region_type
*p
= lang_memory_region_list
;
5271 lang_output_section_statement_type
*os
;
5273 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
5275 p
->old_length
= (bfd_size_type
) (p
->current
- p
->origin
);
5276 p
->current
= p
->origin
;
5279 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5282 os
->processed
= FALSE
;
5284 for (o
= output_bfd
->sections
; o
!= NULL
; o
= o
->next
)
5286 /* Save the last size for possible use by bfd_relax_section. */
5287 o
->rawsize
= o
->size
;
5292 /* Worker for lang_gc_sections_1. */
5295 gc_section_callback (lang_wild_statement_type
*ptr
,
5296 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
5298 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
5299 void *data ATTRIBUTE_UNUSED
)
5301 /* If the wild pattern was marked KEEP, the member sections
5302 should be as well. */
5303 if (ptr
->keep_sections
)
5304 section
->flags
|= SEC_KEEP
;
5307 /* Iterate over sections marking them against GC. */
5310 lang_gc_sections_1 (lang_statement_union_type
*s
)
5312 for (; s
!= NULL
; s
= s
->header
.next
)
5314 switch (s
->header
.type
)
5316 case lang_wild_statement_enum
:
5317 walk_wild (&s
->wild_statement
, gc_section_callback
, NULL
);
5319 case lang_constructors_statement_enum
:
5320 lang_gc_sections_1 (constructor_list
.head
);
5322 case lang_output_section_statement_enum
:
5323 lang_gc_sections_1 (s
->output_section_statement
.children
.head
);
5325 case lang_group_statement_enum
:
5326 lang_gc_sections_1 (s
->group_statement
.children
.head
);
5335 lang_gc_sections (void)
5337 struct bfd_link_hash_entry
*h
;
5338 ldlang_undef_chain_list_type
*ulist
;
5340 /* Keep all sections so marked in the link script. */
5342 lang_gc_sections_1 (statement_list
.head
);
5344 /* Keep all sections containing symbols undefined on the command-line,
5345 and the section containing the entry symbol. */
5347 for (ulist
= link_info
.gc_sym_list
; ulist
; ulist
= ulist
->next
)
5349 h
= bfd_link_hash_lookup (link_info
.hash
, ulist
->name
,
5350 FALSE
, FALSE
, FALSE
);
5353 && (h
->type
== bfd_link_hash_defined
5354 || h
->type
== bfd_link_hash_defweak
)
5355 && ! bfd_is_abs_section (h
->u
.def
.section
))
5357 h
->u
.def
.section
->flags
|= SEC_KEEP
;
5361 /* SEC_EXCLUDE is ignored when doing a relocatable link, except in
5362 the special case of debug info. (See bfd/stabs.c)
5363 Twiddle the flag here, to simplify later linker code. */
5364 if (link_info
.relocatable
)
5366 LANG_FOR_EACH_INPUT_STATEMENT (f
)
5369 for (sec
= f
->the_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5370 if ((sec
->flags
& SEC_DEBUGGING
) == 0)
5371 sec
->flags
&= ~SEC_EXCLUDE
;
5375 if (link_info
.gc_sections
)
5376 bfd_gc_sections (output_bfd
, &link_info
);
5382 current_target
= default_target
;
5384 /* Open the output file. */
5385 lang_for_each_statement (ldlang_open_output
);
5388 ldemul_create_output_section_statements ();
5390 /* Add to the hash table all undefineds on the command line. */
5391 lang_place_undefineds ();
5393 if (!bfd_section_already_linked_table_init ())
5394 einfo (_("%P%F: Failed to create hash table\n"));
5396 /* Create a bfd for each input file. */
5397 current_target
= default_target
;
5398 open_input_bfds (statement_list
.head
, FALSE
);
5400 link_info
.gc_sym_list
= &entry_symbol
;
5401 if (entry_symbol
.name
== NULL
)
5402 link_info
.gc_sym_list
= ldlang_undef_chain_list_head
;
5404 ldemul_after_open ();
5406 bfd_section_already_linked_table_free ();
5408 /* Make sure that we're not mixing architectures. We call this
5409 after all the input files have been opened, but before we do any
5410 other processing, so that any operations merge_private_bfd_data
5411 does on the output file will be known during the rest of the
5415 /* Handle .exports instead of a version script if we're told to do so. */
5416 if (command_line
.version_exports_section
)
5417 lang_do_version_exports_section ();
5419 /* Build all sets based on the information gathered from the input
5421 ldctor_build_sets ();
5423 /* Remove unreferenced sections if asked to. */
5424 lang_gc_sections ();
5426 /* Size up the common data. */
5429 /* Update wild statements. */
5430 update_wild_statements (statement_list
.head
);
5432 /* Run through the contours of the script and attach input sections
5433 to the correct output sections. */
5434 map_input_to_output_sections (statement_list
.head
, NULL
, NULL
);
5436 /* Find any sections not attached explicitly and handle them. */
5437 lang_place_orphans ();
5439 if (! link_info
.relocatable
)
5443 /* Merge SEC_MERGE sections. This has to be done after GC of
5444 sections, so that GCed sections are not merged, but before
5445 assigning dynamic symbols, since removing whole input sections
5447 bfd_merge_sections (output_bfd
, &link_info
);
5449 /* Look for a text section and set the readonly attribute in it. */
5450 found
= bfd_get_section_by_name (output_bfd
, ".text");
5454 if (config
.text_read_only
)
5455 found
->flags
|= SEC_READONLY
;
5457 found
->flags
&= ~SEC_READONLY
;
5461 /* Do anything special before sizing sections. This is where ELF
5462 and other back-ends size dynamic sections. */
5463 ldemul_before_allocation ();
5465 /* We must record the program headers before we try to fix the
5466 section positions, since they will affect SIZEOF_HEADERS. */
5467 lang_record_phdrs ();
5469 /* Size up the sections. */
5470 lang_size_sections (NULL
, !command_line
.relax
);
5472 /* Now run around and relax if we can. */
5473 if (command_line
.relax
)
5475 /* Keep relaxing until bfd_relax_section gives up. */
5476 bfd_boolean relax_again
;
5480 relax_again
= FALSE
;
5482 /* Note: pe-dll.c does something like this also. If you find
5483 you need to change this code, you probably need to change
5484 pe-dll.c also. DJ */
5486 /* Do all the assignments with our current guesses as to
5488 lang_do_assignments ();
5490 /* We must do this after lang_do_assignments, because it uses
5492 lang_reset_memory_regions ();
5494 /* Perform another relax pass - this time we know where the
5495 globals are, so can make a better guess. */
5496 lang_size_sections (&relax_again
, FALSE
);
5498 /* If the normal relax is done and the relax finalize pass
5499 is not performed yet, we perform another relax pass. */
5500 if (!relax_again
&& link_info
.need_relax_finalize
)
5502 link_info
.need_relax_finalize
= FALSE
;
5506 while (relax_again
);
5508 /* Final extra sizing to report errors. */
5509 lang_do_assignments ();
5510 lang_reset_memory_regions ();
5511 lang_size_sections (NULL
, TRUE
);
5514 /* See if anything special should be done now we know how big
5516 ldemul_after_allocation ();
5518 /* Fix any .startof. or .sizeof. symbols. */
5519 lang_set_startof ();
5521 /* Do all the assignments, now that we know the final resting places
5522 of all the symbols. */
5524 lang_do_assignments ();
5526 /* Make sure that the section addresses make sense. */
5527 if (! link_info
.relocatable
5528 && command_line
.check_section_addresses
)
5529 lang_check_section_addresses ();
5536 /* EXPORTED TO YACC */
5539 lang_add_wild (struct wildcard_spec
*filespec
,
5540 struct wildcard_list
*section_list
,
5541 bfd_boolean keep_sections
)
5543 struct wildcard_list
*curr
, *next
;
5544 lang_wild_statement_type
*new;
5546 /* Reverse the list as the parser puts it back to front. */
5547 for (curr
= section_list
, section_list
= NULL
;
5549 section_list
= curr
, curr
= next
)
5551 if (curr
->spec
.name
!= NULL
&& strcmp (curr
->spec
.name
, "COMMON") == 0)
5552 placed_commons
= TRUE
;
5555 curr
->next
= section_list
;
5558 if (filespec
!= NULL
&& filespec
->name
!= NULL
)
5560 if (strcmp (filespec
->name
, "*") == 0)
5561 filespec
->name
= NULL
;
5562 else if (! wildcardp (filespec
->name
))
5563 lang_has_input_file
= TRUE
;
5566 new = new_stat (lang_wild_statement
, stat_ptr
);
5567 new->filename
= NULL
;
5568 new->filenames_sorted
= FALSE
;
5569 if (filespec
!= NULL
)
5571 new->filename
= filespec
->name
;
5572 new->filenames_sorted
= filespec
->sorted
== by_name
;
5574 new->section_list
= section_list
;
5575 new->keep_sections
= keep_sections
;
5576 lang_list_init (&new->children
);
5577 analyze_walk_wild_section_handler (new);
5581 lang_section_start (const char *name
, etree_type
*address
,
5582 const segment_type
*segment
)
5584 lang_address_statement_type
*ad
;
5586 ad
= new_stat (lang_address_statement
, stat_ptr
);
5587 ad
->section_name
= name
;
5588 ad
->address
= address
;
5589 ad
->segment
= segment
;
5592 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
5593 because of a -e argument on the command line, or zero if this is
5594 called by ENTRY in a linker script. Command line arguments take
5598 lang_add_entry (const char *name
, bfd_boolean cmdline
)
5600 if (entry_symbol
.name
== NULL
5602 || ! entry_from_cmdline
)
5604 entry_symbol
.name
= name
;
5605 entry_from_cmdline
= cmdline
;
5609 /* Set the default start symbol to NAME. .em files should use this,
5610 not lang_add_entry, to override the use of "start" if neither the
5611 linker script nor the command line specifies an entry point. NAME
5612 must be permanently allocated. */
5614 lang_default_entry (const char *name
)
5616 entry_symbol_default
= name
;
5620 lang_add_target (const char *name
)
5622 lang_target_statement_type
*new;
5624 new = new_stat (lang_target_statement
, stat_ptr
);
5629 lang_add_map (const char *name
)
5636 map_option_f
= TRUE
;
5644 lang_add_fill (fill_type
*fill
)
5646 lang_fill_statement_type
*new;
5648 new = new_stat (lang_fill_statement
, stat_ptr
);
5653 lang_add_data (int type
, union etree_union
*exp
)
5655 lang_data_statement_type
*new;
5657 new = new_stat (lang_data_statement
, stat_ptr
);
5662 /* Create a new reloc statement. RELOC is the BFD relocation type to
5663 generate. HOWTO is the corresponding howto structure (we could
5664 look this up, but the caller has already done so). SECTION is the
5665 section to generate a reloc against, or NAME is the name of the
5666 symbol to generate a reloc against. Exactly one of SECTION and
5667 NAME must be NULL. ADDEND is an expression for the addend. */
5670 lang_add_reloc (bfd_reloc_code_real_type reloc
,
5671 reloc_howto_type
*howto
,
5674 union etree_union
*addend
)
5676 lang_reloc_statement_type
*p
= new_stat (lang_reloc_statement
, stat_ptr
);
5680 p
->section
= section
;
5682 p
->addend_exp
= addend
;
5684 p
->addend_value
= 0;
5685 p
->output_section
= NULL
;
5686 p
->output_offset
= 0;
5689 lang_assignment_statement_type
*
5690 lang_add_assignment (etree_type
*exp
)
5692 lang_assignment_statement_type
*new;
5694 new = new_stat (lang_assignment_statement
, stat_ptr
);
5700 lang_add_attribute (enum statement_enum attribute
)
5702 new_statement (attribute
, sizeof (lang_statement_header_type
), stat_ptr
);
5706 lang_startup (const char *name
)
5708 if (startup_file
!= NULL
)
5710 einfo (_("%P%F: multiple STARTUP files\n"));
5712 first_file
->filename
= name
;
5713 first_file
->local_sym_name
= name
;
5714 first_file
->real
= TRUE
;
5716 startup_file
= name
;
5720 lang_float (bfd_boolean maybe
)
5722 lang_float_flag
= maybe
;
5726 /* Work out the load- and run-time regions from a script statement, and
5727 store them in *LMA_REGION and *REGION respectively.
5729 MEMSPEC is the name of the run-time region, or the value of
5730 DEFAULT_MEMORY_REGION if the statement didn't specify one.
5731 LMA_MEMSPEC is the name of the load-time region, or null if the
5732 statement didn't specify one.HAVE_LMA_P is TRUE if the statement
5733 had an explicit load address.
5735 It is an error to specify both a load region and a load address. */
5738 lang_get_regions (lang_memory_region_type
**region
,
5739 lang_memory_region_type
**lma_region
,
5740 const char *memspec
,
5741 const char *lma_memspec
,
5742 bfd_boolean have_lma
,
5743 bfd_boolean have_vma
)
5745 *lma_region
= lang_memory_region_lookup (lma_memspec
, FALSE
);
5747 /* If no runtime region or VMA has been specified, but the load region
5748 has been specified, then use the load region for the runtime region
5750 if (lma_memspec
!= NULL
5752 && strcmp (memspec
, DEFAULT_MEMORY_REGION
) == 0)
5753 *region
= *lma_region
;
5755 *region
= lang_memory_region_lookup (memspec
, FALSE
);
5757 if (have_lma
&& lma_memspec
!= 0)
5758 einfo (_("%X%P:%S: section has both a load address and a load region\n"));
5762 lang_leave_output_section_statement (fill_type
*fill
, const char *memspec
,
5763 lang_output_section_phdr_list
*phdrs
,
5764 const char *lma_memspec
)
5766 lang_get_regions (¤t_section
->region
,
5767 ¤t_section
->lma_region
,
5768 memspec
, lma_memspec
,
5769 current_section
->load_base
!= NULL
,
5770 current_section
->addr_tree
!= NULL
);
5771 current_section
->fill
= fill
;
5772 current_section
->phdrs
= phdrs
;
5773 stat_ptr
= &statement_list
;
5776 /* Create an absolute symbol with the given name with the value of the
5777 address of first byte of the section named.
5779 If the symbol already exists, then do nothing. */
5782 lang_abs_symbol_at_beginning_of (const char *secname
, const char *name
)
5784 struct bfd_link_hash_entry
*h
;
5786 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
5788 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5790 if (h
->type
== bfd_link_hash_new
5791 || h
->type
== bfd_link_hash_undefined
)
5795 h
->type
= bfd_link_hash_defined
;
5797 sec
= bfd_get_section_by_name (output_bfd
, secname
);
5801 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, sec
);
5803 h
->u
.def
.section
= bfd_abs_section_ptr
;
5807 /* Create an absolute symbol with the given name with the value of the
5808 address of the first byte after the end of the section named.
5810 If the symbol already exists, then do nothing. */
5813 lang_abs_symbol_at_end_of (const char *secname
, const char *name
)
5815 struct bfd_link_hash_entry
*h
;
5817 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
5819 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5821 if (h
->type
== bfd_link_hash_new
5822 || h
->type
== bfd_link_hash_undefined
)
5826 h
->type
= bfd_link_hash_defined
;
5828 sec
= bfd_get_section_by_name (output_bfd
, secname
);
5832 h
->u
.def
.value
= (bfd_get_section_vma (output_bfd
, sec
)
5833 + TO_ADDR (sec
->size
));
5835 h
->u
.def
.section
= bfd_abs_section_ptr
;
5840 lang_statement_append (lang_statement_list_type
*list
,
5841 lang_statement_union_type
*element
,
5842 lang_statement_union_type
**field
)
5844 *(list
->tail
) = element
;
5848 /* Set the output format type. -oformat overrides scripts. */
5851 lang_add_output_format (const char *format
,
5856 if (output_target
== NULL
|| !from_script
)
5858 if (command_line
.endian
== ENDIAN_BIG
5861 else if (command_line
.endian
== ENDIAN_LITTLE
5865 output_target
= format
;
5869 /* Enter a group. This creates a new lang_group_statement, and sets
5870 stat_ptr to build new statements within the group. */
5873 lang_enter_group (void)
5875 lang_group_statement_type
*g
;
5877 g
= new_stat (lang_group_statement
, stat_ptr
);
5878 lang_list_init (&g
->children
);
5879 stat_ptr
= &g
->children
;
5882 /* Leave a group. This just resets stat_ptr to start writing to the
5883 regular list of statements again. Note that this will not work if
5884 groups can occur inside anything else which can adjust stat_ptr,
5885 but currently they can't. */
5888 lang_leave_group (void)
5890 stat_ptr
= &statement_list
;
5893 /* Add a new program header. This is called for each entry in a PHDRS
5894 command in a linker script. */
5897 lang_new_phdr (const char *name
,
5899 bfd_boolean filehdr
,
5904 struct lang_phdr
*n
, **pp
;
5906 n
= stat_alloc (sizeof (struct lang_phdr
));
5909 n
->type
= exp_get_value_int (type
, 0, "program header type");
5910 n
->filehdr
= filehdr
;
5915 for (pp
= &lang_phdr_list
; *pp
!= NULL
; pp
= &(*pp
)->next
)
5920 /* Record the program header information in the output BFD. FIXME: We
5921 should not be calling an ELF specific function here. */
5924 lang_record_phdrs (void)
5928 lang_output_section_phdr_list
*last
;
5929 struct lang_phdr
*l
;
5930 lang_output_section_statement_type
*os
;
5933 secs
= xmalloc (alc
* sizeof (asection
*));
5935 for (l
= lang_phdr_list
; l
!= NULL
; l
= l
->next
)
5942 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5946 lang_output_section_phdr_list
*pl
;
5948 if (os
->constraint
== -1)
5956 if (os
->sectype
== noload_section
5957 || os
->bfd_section
== NULL
5958 || (os
->bfd_section
->flags
& SEC_ALLOC
) == 0)
5963 if (os
->bfd_section
== NULL
)
5966 for (; pl
!= NULL
; pl
= pl
->next
)
5968 if (strcmp (pl
->name
, l
->name
) == 0)
5973 secs
= xrealloc (secs
, alc
* sizeof (asection
*));
5975 secs
[c
] = os
->bfd_section
;
5982 if (l
->flags
== NULL
)
5985 flags
= exp_get_vma (l
->flags
, 0, "phdr flags");
5990 at
= exp_get_vma (l
->at
, 0, "phdr load address");
5992 if (! bfd_record_phdr (output_bfd
, l
->type
,
5993 l
->flags
!= NULL
, flags
, l
->at
!= NULL
,
5994 at
, l
->filehdr
, l
->phdrs
, c
, secs
))
5995 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
6000 /* Make sure all the phdr assignments succeeded. */
6001 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
6005 lang_output_section_phdr_list
*pl
;
6007 if (os
->constraint
== -1
6008 || os
->bfd_section
== NULL
)
6011 for (pl
= os
->phdrs
;
6014 if (! pl
->used
&& strcmp (pl
->name
, "NONE") != 0)
6015 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
6016 os
->name
, pl
->name
);
6020 /* Record a list of sections which may not be cross referenced. */
6023 lang_add_nocrossref (lang_nocrossref_type
*l
)
6025 struct lang_nocrossrefs
*n
;
6027 n
= xmalloc (sizeof *n
);
6028 n
->next
= nocrossref_list
;
6030 nocrossref_list
= n
;
6032 /* Set notice_all so that we get informed about all symbols. */
6033 link_info
.notice_all
= TRUE
;
6036 /* Overlay handling. We handle overlays with some static variables. */
6038 /* The overlay virtual address. */
6039 static etree_type
*overlay_vma
;
6040 /* And subsection alignment. */
6041 static etree_type
*overlay_subalign
;
6043 /* An expression for the maximum section size seen so far. */
6044 static etree_type
*overlay_max
;
6046 /* A list of all the sections in this overlay. */
6048 struct overlay_list
{
6049 struct overlay_list
*next
;
6050 lang_output_section_statement_type
*os
;
6053 static struct overlay_list
*overlay_list
;
6055 /* Start handling an overlay. */
6058 lang_enter_overlay (etree_type
*vma_expr
, etree_type
*subalign
)
6060 /* The grammar should prevent nested overlays from occurring. */
6061 ASSERT (overlay_vma
== NULL
6062 && overlay_subalign
== NULL
6063 && overlay_max
== NULL
);
6065 overlay_vma
= vma_expr
;
6066 overlay_subalign
= subalign
;
6069 /* Start a section in an overlay. We handle this by calling
6070 lang_enter_output_section_statement with the correct VMA.
6071 lang_leave_overlay sets up the LMA and memory regions. */
6074 lang_enter_overlay_section (const char *name
)
6076 struct overlay_list
*n
;
6079 lang_enter_output_section_statement (name
, overlay_vma
, normal_section
,
6080 0, overlay_subalign
, 0, 0);
6082 /* If this is the first section, then base the VMA of future
6083 sections on this one. This will work correctly even if `.' is
6084 used in the addresses. */
6085 if (overlay_list
== NULL
)
6086 overlay_vma
= exp_nameop (ADDR
, name
);
6088 /* Remember the section. */
6089 n
= xmalloc (sizeof *n
);
6090 n
->os
= current_section
;
6091 n
->next
= overlay_list
;
6094 size
= exp_nameop (SIZEOF
, name
);
6096 /* Arrange to work out the maximum section end address. */
6097 if (overlay_max
== NULL
)
6100 overlay_max
= exp_binop (MAX_K
, overlay_max
, size
);
6103 /* Finish a section in an overlay. There isn't any special to do
6107 lang_leave_overlay_section (fill_type
*fill
,
6108 lang_output_section_phdr_list
*phdrs
)
6115 name
= current_section
->name
;
6117 /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory
6118 region and that no load-time region has been specified. It doesn't
6119 really matter what we say here, since lang_leave_overlay will
6121 lang_leave_output_section_statement (fill
, DEFAULT_MEMORY_REGION
, phdrs
, 0);
6123 /* Define the magic symbols. */
6125 clean
= xmalloc (strlen (name
) + 1);
6127 for (s1
= name
; *s1
!= '\0'; s1
++)
6128 if (ISALNUM (*s1
) || *s1
== '_')
6132 buf
= xmalloc (strlen (clean
) + sizeof "__load_start_");
6133 sprintf (buf
, "__load_start_%s", clean
);
6134 lang_add_assignment (exp_assop ('=', buf
,
6135 exp_nameop (LOADADDR
, name
)));
6137 buf
= xmalloc (strlen (clean
) + sizeof "__load_stop_");
6138 sprintf (buf
, "__load_stop_%s", clean
);
6139 lang_add_assignment (exp_assop ('=', buf
,
6141 exp_nameop (LOADADDR
, name
),
6142 exp_nameop (SIZEOF
, name
))));
6147 /* Finish an overlay. If there are any overlay wide settings, this
6148 looks through all the sections in the overlay and sets them. */
6151 lang_leave_overlay (etree_type
*lma_expr
,
6154 const char *memspec
,
6155 lang_output_section_phdr_list
*phdrs
,
6156 const char *lma_memspec
)
6158 lang_memory_region_type
*region
;
6159 lang_memory_region_type
*lma_region
;
6160 struct overlay_list
*l
;
6161 lang_nocrossref_type
*nocrossref
;
6163 lang_get_regions (®ion
, &lma_region
,
6164 memspec
, lma_memspec
,
6165 lma_expr
!= NULL
, FALSE
);
6169 /* After setting the size of the last section, set '.' to end of the
6171 if (overlay_list
!= NULL
)
6172 overlay_list
->os
->update_dot_tree
6173 = exp_assop ('=', ".", exp_binop ('+', overlay_vma
, overlay_max
));
6178 struct overlay_list
*next
;
6180 if (fill
!= NULL
&& l
->os
->fill
== NULL
)
6183 l
->os
->region
= region
;
6184 l
->os
->lma_region
= lma_region
;
6186 /* The first section has the load address specified in the
6187 OVERLAY statement. The rest are worked out from that.
6188 The base address is not needed (and should be null) if
6189 an LMA region was specified. */
6191 l
->os
->load_base
= lma_expr
;
6192 else if (lma_region
== 0)
6193 l
->os
->load_base
= exp_binop ('+',
6194 exp_nameop (LOADADDR
, l
->next
->os
->name
),
6195 exp_nameop (SIZEOF
, l
->next
->os
->name
));
6197 if (phdrs
!= NULL
&& l
->os
->phdrs
== NULL
)
6198 l
->os
->phdrs
= phdrs
;
6202 lang_nocrossref_type
*nc
;
6204 nc
= xmalloc (sizeof *nc
);
6205 nc
->name
= l
->os
->name
;
6206 nc
->next
= nocrossref
;
6215 if (nocrossref
!= NULL
)
6216 lang_add_nocrossref (nocrossref
);
6219 overlay_list
= NULL
;
6223 /* Version handling. This is only useful for ELF. */
6225 /* This global variable holds the version tree that we build. */
6227 struct bfd_elf_version_tree
*lang_elf_version_info
;
6229 /* If PREV is NULL, return first version pattern matching particular symbol.
6230 If PREV is non-NULL, return first version pattern matching particular
6231 symbol after PREV (previously returned by lang_vers_match). */
6233 static struct bfd_elf_version_expr
*
6234 lang_vers_match (struct bfd_elf_version_expr_head
*head
,
6235 struct bfd_elf_version_expr
*prev
,
6238 const char *cxx_sym
= sym
;
6239 const char *java_sym
= sym
;
6240 struct bfd_elf_version_expr
*expr
= NULL
;
6242 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
6244 cxx_sym
= cplus_demangle (sym
, DMGL_PARAMS
| DMGL_ANSI
);
6248 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
6250 java_sym
= cplus_demangle (sym
, DMGL_JAVA
);
6255 if (head
->htab
&& (prev
== NULL
|| prev
->symbol
))
6257 struct bfd_elf_version_expr e
;
6259 switch (prev
? prev
->mask
: 0)
6262 if (head
->mask
& BFD_ELF_VERSION_C_TYPE
)
6265 expr
= htab_find (head
->htab
, &e
);
6266 while (expr
&& strcmp (expr
->symbol
, sym
) == 0)
6267 if (expr
->mask
== BFD_ELF_VERSION_C_TYPE
)
6273 case BFD_ELF_VERSION_C_TYPE
:
6274 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
6277 expr
= htab_find (head
->htab
, &e
);
6278 while (expr
&& strcmp (expr
->symbol
, cxx_sym
) == 0)
6279 if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
6285 case BFD_ELF_VERSION_CXX_TYPE
:
6286 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
6288 e
.symbol
= java_sym
;
6289 expr
= htab_find (head
->htab
, &e
);
6290 while (expr
&& strcmp (expr
->symbol
, java_sym
) == 0)
6291 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
6302 /* Finally, try the wildcards. */
6303 if (prev
== NULL
|| prev
->symbol
)
6304 expr
= head
->remaining
;
6307 for (; expr
; expr
= expr
->next
)
6314 if (expr
->pattern
[0] == '*' && expr
->pattern
[1] == '\0')
6317 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
6319 else if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
6323 if (fnmatch (expr
->pattern
, s
, 0) == 0)
6329 free ((char *) cxx_sym
);
6330 if (java_sym
!= sym
)
6331 free ((char *) java_sym
);
6335 /* Return NULL if the PATTERN argument is a glob pattern, otherwise,
6336 return a string pointing to the symbol name. */
6339 realsymbol (const char *pattern
)
6342 bfd_boolean changed
= FALSE
, backslash
= FALSE
;
6343 char *s
, *symbol
= xmalloc (strlen (pattern
) + 1);
6345 for (p
= pattern
, s
= symbol
; *p
!= '\0'; ++p
)
6347 /* It is a glob pattern only if there is no preceding
6349 if (! backslash
&& (*p
== '?' || *p
== '*' || *p
== '['))
6357 /* Remove the preceding backslash. */
6364 backslash
= *p
== '\\';
6379 /* This is called for each variable name or match expression. NEW is
6380 the name of the symbol to match, or, if LITERAL_P is FALSE, a glob
6381 pattern to be matched against symbol names. */
6383 struct bfd_elf_version_expr
*
6384 lang_new_vers_pattern (struct bfd_elf_version_expr
*orig
,
6387 bfd_boolean literal_p
)
6389 struct bfd_elf_version_expr
*ret
;
6391 ret
= xmalloc (sizeof *ret
);
6393 ret
->pattern
= literal_p
? NULL
: new;
6396 ret
->symbol
= literal_p
? new : realsymbol (new);
6398 if (lang
== NULL
|| strcasecmp (lang
, "C") == 0)
6399 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
6400 else if (strcasecmp (lang
, "C++") == 0)
6401 ret
->mask
= BFD_ELF_VERSION_CXX_TYPE
;
6402 else if (strcasecmp (lang
, "Java") == 0)
6403 ret
->mask
= BFD_ELF_VERSION_JAVA_TYPE
;
6406 einfo (_("%X%P: unknown language `%s' in version information\n"),
6408 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
6411 return ldemul_new_vers_pattern (ret
);
6414 /* This is called for each set of variable names and match
6417 struct bfd_elf_version_tree
*
6418 lang_new_vers_node (struct bfd_elf_version_expr
*globals
,
6419 struct bfd_elf_version_expr
*locals
)
6421 struct bfd_elf_version_tree
*ret
;
6423 ret
= xcalloc (1, sizeof *ret
);
6424 ret
->globals
.list
= globals
;
6425 ret
->locals
.list
= locals
;
6426 ret
->match
= lang_vers_match
;
6427 ret
->name_indx
= (unsigned int) -1;
6431 /* This static variable keeps track of version indices. */
6433 static int version_index
;
6436 version_expr_head_hash (const void *p
)
6438 const struct bfd_elf_version_expr
*e
= p
;
6440 return htab_hash_string (e
->symbol
);
6444 version_expr_head_eq (const void *p1
, const void *p2
)
6446 const struct bfd_elf_version_expr
*e1
= p1
;
6447 const struct bfd_elf_version_expr
*e2
= p2
;
6449 return strcmp (e1
->symbol
, e2
->symbol
) == 0;
6453 lang_finalize_version_expr_head (struct bfd_elf_version_expr_head
*head
)
6456 struct bfd_elf_version_expr
*e
, *next
;
6457 struct bfd_elf_version_expr
**list_loc
, **remaining_loc
;
6459 for (e
= head
->list
; e
; e
= e
->next
)
6463 head
->mask
|= e
->mask
;
6468 head
->htab
= htab_create (count
* 2, version_expr_head_hash
,
6469 version_expr_head_eq
, NULL
);
6470 list_loc
= &head
->list
;
6471 remaining_loc
= &head
->remaining
;
6472 for (e
= head
->list
; e
; e
= next
)
6478 remaining_loc
= &e
->next
;
6482 void **loc
= htab_find_slot (head
->htab
, e
, INSERT
);
6486 struct bfd_elf_version_expr
*e1
, *last
;
6492 if (e1
->mask
== e
->mask
)
6500 while (e1
&& strcmp (e1
->symbol
, e
->symbol
) == 0);
6504 /* This is a duplicate. */
6505 /* FIXME: Memory leak. Sometimes pattern is not
6506 xmalloced alone, but in larger chunk of memory. */
6507 /* free (e->symbol); */
6512 e
->next
= last
->next
;
6520 list_loc
= &e
->next
;
6524 *remaining_loc
= NULL
;
6525 *list_loc
= head
->remaining
;
6528 head
->remaining
= head
->list
;
6531 /* This is called when we know the name and dependencies of the
6535 lang_register_vers_node (const char *name
,
6536 struct bfd_elf_version_tree
*version
,
6537 struct bfd_elf_version_deps
*deps
)
6539 struct bfd_elf_version_tree
*t
, **pp
;
6540 struct bfd_elf_version_expr
*e1
;
6545 if ((name
[0] == '\0' && lang_elf_version_info
!= NULL
)
6546 || (lang_elf_version_info
&& lang_elf_version_info
->name
[0] == '\0'))
6548 einfo (_("%X%P: anonymous version tag cannot be combined"
6549 " with other version tags\n"));
6554 /* Make sure this node has a unique name. */
6555 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6556 if (strcmp (t
->name
, name
) == 0)
6557 einfo (_("%X%P: duplicate version tag `%s'\n"), name
);
6559 lang_finalize_version_expr_head (&version
->globals
);
6560 lang_finalize_version_expr_head (&version
->locals
);
6562 /* Check the global and local match names, and make sure there
6563 aren't any duplicates. */
6565 for (e1
= version
->globals
.list
; e1
!= NULL
; e1
= e1
->next
)
6567 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6569 struct bfd_elf_version_expr
*e2
;
6571 if (t
->locals
.htab
&& e1
->symbol
)
6573 e2
= htab_find (t
->locals
.htab
, e1
);
6574 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
6576 if (e1
->mask
== e2
->mask
)
6577 einfo (_("%X%P: duplicate expression `%s'"
6578 " in version information\n"), e1
->symbol
);
6582 else if (!e1
->symbol
)
6583 for (e2
= t
->locals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
6584 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
6585 && e1
->mask
== e2
->mask
)
6586 einfo (_("%X%P: duplicate expression `%s'"
6587 " in version information\n"), e1
->pattern
);
6591 for (e1
= version
->locals
.list
; e1
!= NULL
; e1
= e1
->next
)
6593 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6595 struct bfd_elf_version_expr
*e2
;
6597 if (t
->globals
.htab
&& e1
->symbol
)
6599 e2
= htab_find (t
->globals
.htab
, e1
);
6600 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
6602 if (e1
->mask
== e2
->mask
)
6603 einfo (_("%X%P: duplicate expression `%s'"
6604 " in version information\n"),
6609 else if (!e1
->symbol
)
6610 for (e2
= t
->globals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
6611 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
6612 && e1
->mask
== e2
->mask
)
6613 einfo (_("%X%P: duplicate expression `%s'"
6614 " in version information\n"), e1
->pattern
);
6618 version
->deps
= deps
;
6619 version
->name
= name
;
6620 if (name
[0] != '\0')
6623 version
->vernum
= version_index
;
6626 version
->vernum
= 0;
6628 for (pp
= &lang_elf_version_info
; *pp
!= NULL
; pp
= &(*pp
)->next
)
6633 /* This is called when we see a version dependency. */
6635 struct bfd_elf_version_deps
*
6636 lang_add_vers_depend (struct bfd_elf_version_deps
*list
, const char *name
)
6638 struct bfd_elf_version_deps
*ret
;
6639 struct bfd_elf_version_tree
*t
;
6641 ret
= xmalloc (sizeof *ret
);
6644 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6646 if (strcmp (t
->name
, name
) == 0)
6648 ret
->version_needed
= t
;
6653 einfo (_("%X%P: unable to find version dependency `%s'\n"), name
);
6659 lang_do_version_exports_section (void)
6661 struct bfd_elf_version_expr
*greg
= NULL
, *lreg
;
6663 LANG_FOR_EACH_INPUT_STATEMENT (is
)
6665 asection
*sec
= bfd_get_section_by_name (is
->the_bfd
, ".exports");
6673 contents
= xmalloc (len
);
6674 if (!bfd_get_section_contents (is
->the_bfd
, sec
, contents
, 0, len
))
6675 einfo (_("%X%P: unable to read .exports section contents\n"), sec
);
6678 while (p
< contents
+ len
)
6680 greg
= lang_new_vers_pattern (greg
, p
, NULL
, FALSE
);
6681 p
= strchr (p
, '\0') + 1;
6684 /* Do not free the contents, as we used them creating the regex. */
6686 /* Do not include this section in the link. */
6687 sec
->flags
|= SEC_EXCLUDE
;
6690 lreg
= lang_new_vers_pattern (NULL
, "*", NULL
, FALSE
);
6691 lang_register_vers_node (command_line
.version_exports_section
,
6692 lang_new_vers_node (greg
, lreg
), NULL
);
6696 lang_add_unique (const char *name
)
6698 struct unique_sections
*ent
;
6700 for (ent
= unique_section_list
; ent
; ent
= ent
->next
)
6701 if (strcmp (ent
->name
, name
) == 0)
6704 ent
= xmalloc (sizeof *ent
);
6705 ent
->name
= xstrdup (name
);
6706 ent
->next
= unique_section_list
;
6707 unique_section_list
= ent
;