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
.next
= NULL
;
789 lang_has_input_file
= TRUE
;
791 p
->sysrooted
= FALSE
;
794 case lang_input_file_is_symbols_only_enum
:
796 p
->is_archive
= FALSE
;
798 p
->local_sym_name
= name
;
799 p
->just_syms_flag
= TRUE
;
800 p
->search_dirs_flag
= FALSE
;
802 case lang_input_file_is_fake_enum
:
804 p
->is_archive
= FALSE
;
806 p
->local_sym_name
= name
;
807 p
->just_syms_flag
= FALSE
;
808 p
->search_dirs_flag
= FALSE
;
810 case lang_input_file_is_l_enum
:
811 p
->is_archive
= TRUE
;
814 p
->local_sym_name
= concat ("-l", name
, NULL
);
815 p
->just_syms_flag
= FALSE
;
816 p
->search_dirs_flag
= TRUE
;
818 case lang_input_file_is_marker_enum
:
820 p
->is_archive
= FALSE
;
822 p
->local_sym_name
= name
;
823 p
->just_syms_flag
= FALSE
;
824 p
->search_dirs_flag
= TRUE
;
826 case lang_input_file_is_search_file_enum
:
827 p
->sysrooted
= ldlang_sysrooted_script
;
829 p
->is_archive
= FALSE
;
831 p
->local_sym_name
= name
;
832 p
->just_syms_flag
= FALSE
;
833 p
->search_dirs_flag
= TRUE
;
835 case lang_input_file_is_file_enum
:
837 p
->is_archive
= FALSE
;
839 p
->local_sym_name
= name
;
840 p
->just_syms_flag
= FALSE
;
841 p
->search_dirs_flag
= FALSE
;
848 p
->next_real_file
= NULL
;
851 p
->dynamic
= config
.dynamic_link
;
852 p
->add_needed
= add_needed
;
853 p
->as_needed
= as_needed
;
854 p
->whole_archive
= whole_archive
;
856 lang_statement_append (&input_file_chain
,
857 (lang_statement_union_type
*) p
,
862 lang_input_statement_type
*
863 lang_add_input_file (const char *name
,
864 lang_input_file_enum_type file_type
,
867 lang_has_input_file
= TRUE
;
868 return new_afile (name
, file_type
, target
, TRUE
);
871 /* Build enough state so that the parser can build its tree. */
876 obstack_begin (&stat_obstack
, 1000);
878 stat_ptr
= &statement_list
;
880 lang_list_init (stat_ptr
);
882 lang_list_init (&input_file_chain
);
883 lang_list_init (&lang_output_section_statement
);
884 lang_list_init (&file_chain
);
885 first_file
= lang_add_input_file (NULL
, lang_input_file_is_marker_enum
,
888 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME
);
890 abs_output_section
->bfd_section
= bfd_abs_section_ptr
;
892 /* The value "3" is ad-hoc, somewhat related to the expected number of
893 DEFINED expressions in a linker script. For most default linker
894 scripts, there are none. Why a hash table then? Well, it's somewhat
895 simpler to re-use working machinery than using a linked list in terms
896 of code-complexity here in ld, besides the initialization which just
897 looks like other code here. */
898 if (!bfd_hash_table_init_n (&lang_definedness_table
,
899 lang_definedness_newfunc
, 3))
900 einfo (_("%P%F: out of memory during initialization"));
903 /*----------------------------------------------------------------------
904 A region is an area of memory declared with the
905 MEMORY { name:org=exp, len=exp ... }
908 We maintain a list of all the regions here.
910 If no regions are specified in the script, then the default is used
911 which is created when looked up to be the entire data space.
913 If create is true we are creating a region inside a MEMORY block.
914 In this case it is probably an error to create a region that has
915 already been created. If we are not inside a MEMORY block it is
916 dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION)
917 and so we issue a warning. */
919 static lang_memory_region_type
*lang_memory_region_list
;
920 static lang_memory_region_type
**lang_memory_region_list_tail
921 = &lang_memory_region_list
;
923 lang_memory_region_type
*
924 lang_memory_region_lookup (const char *const name
, bfd_boolean create
)
926 lang_memory_region_type
*p
;
927 lang_memory_region_type
*new;
929 /* NAME is NULL for LMA memspecs if no region was specified. */
933 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
934 if (strcmp (p
->name
, name
) == 0)
937 einfo (_("%P:%S: warning: redeclaration of memory region '%s'\n"),
942 if (!create
&& strcmp (name
, DEFAULT_MEMORY_REGION
))
943 einfo (_("%P:%S: warning: memory region %s not declared\n"), name
);
945 new = stat_alloc (sizeof (lang_memory_region_type
));
947 new->name
= xstrdup (name
);
950 *lang_memory_region_list_tail
= new;
951 lang_memory_region_list_tail
= &new->next
;
955 new->length
= ~(bfd_size_type
) 0;
957 new->had_full_message
= FALSE
;
962 static lang_memory_region_type
*
963 lang_memory_default (asection
*section
)
965 lang_memory_region_type
*p
;
967 flagword sec_flags
= section
->flags
;
969 /* Override SEC_DATA to mean a writable section. */
970 if ((sec_flags
& (SEC_ALLOC
| SEC_READONLY
| SEC_CODE
)) == SEC_ALLOC
)
971 sec_flags
|= SEC_DATA
;
973 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
975 if ((p
->flags
& sec_flags
) != 0
976 && (p
->not_flags
& sec_flags
) == 0)
981 return lang_memory_region_lookup (DEFAULT_MEMORY_REGION
, FALSE
);
984 static lang_output_section_statement_type
*
985 lang_output_section_find_1 (const char *const name
, int constraint
)
987 lang_output_section_statement_type
*lookup
;
989 for (lookup
= &lang_output_section_statement
.head
->output_section_statement
;
991 lookup
= lookup
->next
)
993 if (strcmp (name
, lookup
->name
) == 0
994 && lookup
->constraint
!= -1
996 || (constraint
== lookup
->constraint
997 && constraint
!= SPECIAL
)))
1003 lang_output_section_statement_type
*
1004 lang_output_section_find (const char *const name
)
1006 return lang_output_section_find_1 (name
, 0);
1009 static lang_output_section_statement_type
*
1010 lang_output_section_statement_lookup_1 (const char *const name
, int constraint
)
1012 lang_output_section_statement_type
*lookup
;
1013 lang_output_section_statement_type
**nextp
;
1015 lookup
= lang_output_section_find_1 (name
, constraint
);
1018 lookup
= new_stat (lang_output_section_statement
, stat_ptr
);
1019 lookup
->region
= NULL
;
1020 lookup
->lma_region
= NULL
;
1022 lookup
->block_value
= 1;
1023 lookup
->name
= name
;
1025 lookup
->next
= NULL
;
1026 lookup
->bfd_section
= NULL
;
1027 lookup
->processed
= 0;
1028 lookup
->constraint
= constraint
;
1029 lookup
->ignored
= FALSE
;
1030 lookup
->sectype
= normal_section
;
1031 lookup
->addr_tree
= NULL
;
1032 lang_list_init (&lookup
->children
);
1034 lookup
->memspec
= NULL
;
1036 lookup
->subsection_alignment
= -1;
1037 lookup
->section_alignment
= -1;
1038 lookup
->load_base
= NULL
;
1039 lookup
->update_dot_tree
= NULL
;
1040 lookup
->phdrs
= NULL
;
1042 /* GCC's strict aliasing rules prevent us from just casting the
1043 address, so we store the pointer in a variable and cast that
1045 nextp
= &lookup
->next
;
1046 lang_statement_append (&lang_output_section_statement
,
1047 (lang_statement_union_type
*) lookup
,
1048 (lang_statement_union_type
**) nextp
);
1053 lang_output_section_statement_type
*
1054 lang_output_section_statement_lookup (const char *const name
)
1056 return lang_output_section_statement_lookup_1 (name
, 0);
1059 /* A variant of lang_output_section_find used by place_orphan.
1060 Returns the output statement that should precede a new output
1061 statement for SEC. If an exact match is found on certain flags,
1064 lang_output_section_statement_type
*
1065 lang_output_section_find_by_flags (const asection
*sec
,
1066 lang_output_section_statement_type
**exact
)
1068 lang_output_section_statement_type
*first
, *look
, *found
;
1071 /* We know the first statement on this list is *ABS*. May as well
1073 first
= &lang_output_section_statement
.head
->output_section_statement
;
1074 first
= first
->next
;
1076 /* First try for an exact match. */
1078 for (look
= first
; look
; look
= look
->next
)
1080 flags
= look
->flags
;
1081 if (look
->bfd_section
!= NULL
)
1082 flags
= look
->bfd_section
->flags
;
1083 flags
^= sec
->flags
;
1084 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1085 | SEC_CODE
| SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1094 if (sec
->flags
& SEC_CODE
)
1096 /* Try for a rw code section. */
1097 for (look
= first
; look
; look
= look
->next
)
1099 flags
= look
->flags
;
1100 if (look
->bfd_section
!= NULL
)
1101 flags
= look
->bfd_section
->flags
;
1102 flags
^= sec
->flags
;
1103 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1104 | SEC_CODE
| SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1110 if (sec
->flags
& (SEC_READONLY
| SEC_THREAD_LOCAL
))
1112 /* .rodata can go after .text, .sdata2 after .rodata. */
1113 for (look
= first
; look
; look
= look
->next
)
1115 flags
= look
->flags
;
1116 if (look
->bfd_section
!= NULL
)
1117 flags
= look
->bfd_section
->flags
;
1118 flags
^= sec
->flags
;
1119 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1121 && !(look
->flags
& (SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1127 if (sec
->flags
& SEC_SMALL_DATA
)
1129 /* .sdata goes after .data, .sbss after .sdata. */
1130 for (look
= first
; look
; look
= look
->next
)
1132 flags
= look
->flags
;
1133 if (look
->bfd_section
!= NULL
)
1134 flags
= look
->bfd_section
->flags
;
1135 flags
^= sec
->flags
;
1136 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1137 | SEC_THREAD_LOCAL
))
1138 || ((look
->flags
& SEC_SMALL_DATA
)
1139 && !(sec
->flags
& SEC_HAS_CONTENTS
)))
1145 if (sec
->flags
& SEC_HAS_CONTENTS
)
1147 /* .data goes after .rodata. */
1148 for (look
= first
; look
; look
= look
->next
)
1150 flags
= look
->flags
;
1151 if (look
->bfd_section
!= NULL
)
1152 flags
= look
->bfd_section
->flags
;
1153 flags
^= sec
->flags
;
1154 if (!(flags
& (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
1155 | SEC_SMALL_DATA
| SEC_THREAD_LOCAL
)))
1161 /* .bss goes last. */
1162 for (look
= first
; look
; look
= look
->next
)
1164 flags
= look
->flags
;
1165 if (look
->bfd_section
!= NULL
)
1166 flags
= look
->bfd_section
->flags
;
1167 flags
^= sec
->flags
;
1168 if (!(flags
& SEC_ALLOC
))
1175 /* Find the last output section before given output statement.
1176 Used by place_orphan. */
1179 output_prev_sec_find (lang_output_section_statement_type
*os
)
1181 asection
*s
= (asection
*) NULL
;
1182 lang_output_section_statement_type
*lookup
;
1184 for (lookup
= &lang_output_section_statement
.head
->output_section_statement
;
1186 lookup
= lookup
->next
)
1188 if (lookup
->constraint
== -1)
1193 if (lookup
->bfd_section
!= NULL
&& lookup
->bfd_section
->owner
!= NULL
)
1194 s
= lookup
->bfd_section
;
1200 lang_output_section_statement_type
*
1201 lang_insert_orphan (lang_input_statement_type
*file
,
1203 const char *secname
,
1204 lang_output_section_statement_type
*after
,
1205 struct orphan_save
*place
,
1206 etree_type
*address
,
1207 lang_statement_list_type
*add_child
)
1209 lang_statement_list_type
*old
;
1210 lang_statement_list_type add
;
1212 etree_type
*load_base
;
1213 lang_output_section_statement_type
*os
;
1214 lang_output_section_statement_type
**os_tail
;
1216 /* Start building a list of statements for this section.
1217 First save the current statement pointer. */
1220 /* If we have found an appropriate place for the output section
1221 statements for this orphan, add them to our own private list,
1222 inserting them later into the global statement list. */
1226 lang_list_init (stat_ptr
);
1230 if (config
.build_constructors
)
1232 /* If the name of the section is representable in C, then create
1233 symbols to mark the start and the end of the section. */
1234 for (ps
= secname
; *ps
!= '\0'; ps
++)
1235 if (! ISALNUM ((unsigned char) *ps
) && *ps
!= '_')
1240 etree_type
*e_align
;
1242 symname
= (char *) xmalloc (ps
- secname
+ sizeof "__start_" + 1);
1243 symname
[0] = bfd_get_symbol_leading_char (output_bfd
);
1244 sprintf (symname
+ (symname
[0] != 0), "__start_%s", secname
);
1245 e_align
= exp_unop (ALIGN_K
,
1246 exp_intop ((bfd_vma
) 1 << s
->alignment_power
));
1247 lang_add_assignment (exp_assop ('=', ".", e_align
));
1248 lang_add_assignment (exp_assop ('=', symname
,
1249 exp_nameop (NAME
, ".")));
1253 if (link_info
.relocatable
|| (s
->flags
& (SEC_LOAD
| SEC_ALLOC
)) == 0)
1254 address
= exp_intop (0);
1257 if (after
!= NULL
&& after
->load_base
!= NULL
)
1259 etree_type
*lma_from_vma
;
1260 lma_from_vma
= exp_binop ('-', after
->load_base
,
1261 exp_nameop (ADDR
, after
->name
));
1262 load_base
= exp_binop ('+', lma_from_vma
,
1263 exp_nameop (ADDR
, secname
));
1266 os_tail
= ((lang_output_section_statement_type
**)
1267 lang_output_section_statement
.tail
);
1268 os
= lang_enter_output_section_statement (secname
, address
, 0, NULL
, NULL
,
1271 if (add_child
== NULL
)
1272 add_child
= &os
->children
;
1273 lang_add_section (add_child
, s
, os
, file
);
1275 lang_leave_output_section_statement (0, "*default*", NULL
, NULL
);
1277 if (config
.build_constructors
&& *ps
== '\0')
1281 /* lang_leave_ouput_section_statement resets stat_ptr.
1282 Put stat_ptr back where we want it. */
1286 symname
= (char *) xmalloc (ps
- secname
+ sizeof "__stop_" + 1);
1287 symname
[0] = bfd_get_symbol_leading_char (output_bfd
);
1288 sprintf (symname
+ (symname
[0] != 0), "__stop_%s", secname
);
1289 lang_add_assignment (exp_assop ('=', symname
,
1290 exp_nameop (NAME
, ".")));
1293 /* Restore the global list pointer. */
1297 if (after
!= NULL
&& os
->bfd_section
!= NULL
)
1299 asection
*snew
, *as
;
1301 snew
= os
->bfd_section
;
1303 /* Shuffle the bfd section list to make the output file look
1304 neater. This is really only cosmetic. */
1305 if (place
->section
== NULL
1306 && after
!= (&lang_output_section_statement
.head
1307 ->output_section_statement
))
1309 asection
*bfd_section
= after
->bfd_section
;
1311 /* If the output statement hasn't been used to place any input
1312 sections (and thus doesn't have an output bfd_section),
1313 look for the closest prior output statement having an
1315 if (bfd_section
== NULL
)
1316 bfd_section
= output_prev_sec_find (after
);
1318 if (bfd_section
!= NULL
&& bfd_section
!= snew
)
1319 place
->section
= &bfd_section
->next
;
1322 if (place
->section
== NULL
)
1323 place
->section
= &output_bfd
->sections
;
1325 as
= *place
->section
;
1326 if (as
!= snew
&& as
->prev
!= snew
)
1328 /* Unlink the section. */
1329 bfd_section_list_remove (output_bfd
, snew
);
1331 /* Now tack it back on in the right place. */
1332 bfd_section_list_insert_before (output_bfd
, as
, snew
);
1335 /* Save the end of this list. Further ophans of this type will
1336 follow the one we've just added. */
1337 place
->section
= &snew
->next
;
1339 /* The following is non-cosmetic. We try to put the output
1340 statements in some sort of reasonable order here, because they
1341 determine the final load addresses of the orphan sections.
1342 In addition, placing output statements in the wrong order may
1343 require extra segments. For instance, given a typical
1344 situation of all read-only sections placed in one segment and
1345 following that a segment containing all the read-write
1346 sections, we wouldn't want to place an orphan read/write
1347 section before or amongst the read-only ones. */
1348 if (add
.head
!= NULL
)
1350 lang_output_section_statement_type
*newly_added_os
;
1352 if (place
->stmt
== NULL
)
1354 lang_statement_union_type
**where
;
1355 lang_statement_union_type
**assign
= NULL
;
1357 /* Look for a suitable place for the new statement list.
1358 The idea is to skip over anything that might be inside
1359 a SECTIONS {} statement in a script, before we find
1360 another output_section_statement. Assignments to "dot"
1361 before an output section statement are assumed to
1363 for (where
= &after
->header
.next
;
1365 where
= &(*where
)->header
.next
)
1367 switch ((*where
)->header
.type
)
1369 case lang_assignment_statement_enum
:
1372 lang_assignment_statement_type
*ass
;
1373 ass
= &(*where
)->assignment_statement
;
1374 if (ass
->exp
->type
.node_class
!= etree_assert
1375 && ass
->exp
->assign
.dst
[0] == '.'
1376 && ass
->exp
->assign
.dst
[1] == 0)
1380 case lang_wild_statement_enum
:
1381 case lang_input_section_enum
:
1382 case lang_object_symbols_statement_enum
:
1383 case lang_fill_statement_enum
:
1384 case lang_data_statement_enum
:
1385 case lang_reloc_statement_enum
:
1386 case lang_padding_statement_enum
:
1387 case lang_constructors_statement_enum
:
1390 case lang_output_section_statement_enum
:
1393 case lang_input_statement_enum
:
1394 case lang_address_statement_enum
:
1395 case lang_target_statement_enum
:
1396 case lang_output_statement_enum
:
1397 case lang_group_statement_enum
:
1398 case lang_afile_asection_pair_statement_enum
:
1407 place
->os_tail
= &after
->next
;
1411 /* Put it after the last orphan statement we added. */
1412 *add
.tail
= *place
->stmt
;
1413 *place
->stmt
= add
.head
;
1416 /* Fix the global list pointer if we happened to tack our
1417 new list at the tail. */
1418 if (*old
->tail
== add
.head
)
1419 old
->tail
= add
.tail
;
1421 /* Save the end of this list. */
1422 place
->stmt
= add
.tail
;
1424 /* Do the same for the list of output section statements. */
1425 newly_added_os
= *os_tail
;
1427 newly_added_os
->next
= *place
->os_tail
;
1428 *place
->os_tail
= newly_added_os
;
1429 place
->os_tail
= &newly_added_os
->next
;
1431 /* Fixing the global list pointer here is a little different.
1432 We added to the list in lang_enter_output_section_statement,
1433 trimmed off the new output_section_statment above when
1434 assigning *os_tail = NULL, but possibly added it back in
1435 the same place when assigning *place->os_tail. */
1436 if (*os_tail
== NULL
)
1437 lang_output_section_statement
.tail
1438 = (lang_statement_union_type
**) os_tail
;
1445 lang_map_flags (flagword flag
)
1447 if (flag
& SEC_ALLOC
)
1450 if (flag
& SEC_CODE
)
1453 if (flag
& SEC_READONLY
)
1456 if (flag
& SEC_DATA
)
1459 if (flag
& SEC_LOAD
)
1466 lang_memory_region_type
*m
;
1469 minfo (_("\nMemory Configuration\n\n"));
1470 fprintf (config
.map_file
, "%-16s %-18s %-18s %s\n",
1471 _("Name"), _("Origin"), _("Length"), _("Attributes"));
1473 for (m
= lang_memory_region_list
; m
!= NULL
; m
= m
->next
)
1478 fprintf (config
.map_file
, "%-16s ", m
->name
);
1480 sprintf_vma (buf
, m
->origin
);
1481 minfo ("0x%s ", buf
);
1489 minfo ("0x%V", m
->length
);
1490 if (m
->flags
|| m
->not_flags
)
1498 lang_map_flags (m
->flags
);
1504 lang_map_flags (m
->not_flags
);
1511 fprintf (config
.map_file
, _("\nLinker script and memory map\n\n"));
1513 if (! command_line
.reduce_memory_overheads
)
1515 obstack_begin (&map_obstack
, 1000);
1516 for (p
= link_info
.input_bfds
; p
!= (bfd
*) NULL
; p
= p
->link_next
)
1517 bfd_map_over_sections (p
, init_map_userdata
, 0);
1518 bfd_link_hash_traverse (link_info
.hash
, sort_def_symbol
, 0);
1520 print_statements ();
1524 init_map_userdata (abfd
, sec
, data
)
1525 bfd
*abfd ATTRIBUTE_UNUSED
;
1527 void *data ATTRIBUTE_UNUSED
;
1529 fat_section_userdata_type
*new_data
1530 = ((fat_section_userdata_type
*) (stat_alloc
1531 (sizeof (fat_section_userdata_type
))));
1533 ASSERT (get_userdata (sec
) == NULL
);
1534 get_userdata (sec
) = new_data
;
1535 new_data
->map_symbol_def_tail
= &new_data
->map_symbol_def_head
;
1539 sort_def_symbol (hash_entry
, info
)
1540 struct bfd_link_hash_entry
*hash_entry
;
1541 void *info ATTRIBUTE_UNUSED
;
1543 if (hash_entry
->type
== bfd_link_hash_defined
1544 || hash_entry
->type
== bfd_link_hash_defweak
)
1546 struct fat_user_section_struct
*ud
;
1547 struct map_symbol_def
*def
;
1549 ud
= get_userdata (hash_entry
->u
.def
.section
);
1552 /* ??? What do we have to do to initialize this beforehand? */
1553 /* The first time we get here is bfd_abs_section... */
1554 init_map_userdata (0, hash_entry
->u
.def
.section
, 0);
1555 ud
= get_userdata (hash_entry
->u
.def
.section
);
1557 else if (!ud
->map_symbol_def_tail
)
1558 ud
->map_symbol_def_tail
= &ud
->map_symbol_def_head
;
1560 def
= obstack_alloc (&map_obstack
, sizeof *def
);
1561 def
->entry
= hash_entry
;
1562 *(ud
->map_symbol_def_tail
) = def
;
1563 ud
->map_symbol_def_tail
= &def
->next
;
1568 /* Initialize an output section. */
1571 init_os (lang_output_section_statement_type
*s
)
1573 if (s
->bfd_section
!= NULL
)
1576 if (strcmp (s
->name
, DISCARD_SECTION_NAME
) == 0)
1577 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME
);
1579 s
->bfd_section
= bfd_get_section_by_name (output_bfd
, s
->name
);
1580 if (s
->bfd_section
== NULL
)
1581 s
->bfd_section
= bfd_make_section (output_bfd
, s
->name
);
1582 if (s
->bfd_section
== NULL
)
1584 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
1585 output_bfd
->xvec
->name
, s
->name
);
1587 s
->bfd_section
->output_section
= s
->bfd_section
;
1589 /* We initialize an output sections output offset to minus its own
1590 vma to allow us to output a section through itself. */
1591 s
->bfd_section
->output_offset
= 0;
1592 if (!command_line
.reduce_memory_overheads
)
1594 fat_section_userdata_type
*new
1595 = stat_alloc (sizeof (fat_section_userdata_type
));
1596 memset (new, 0, sizeof (fat_section_userdata_type
));
1597 get_userdata (s
->bfd_section
) = new;
1601 /* If there is a base address, make sure that any sections it might
1602 mention are initialized. */
1603 if (s
->addr_tree
!= NULL
)
1604 exp_init_os (s
->addr_tree
);
1606 if (s
->load_base
!= NULL
)
1607 exp_init_os (s
->load_base
);
1610 /* Make sure that all output sections mentioned in an expression are
1614 exp_init_os (etree_type
*exp
)
1616 switch (exp
->type
.node_class
)
1620 exp_init_os (exp
->assign
.src
);
1624 exp_init_os (exp
->binary
.lhs
);
1625 exp_init_os (exp
->binary
.rhs
);
1629 exp_init_os (exp
->trinary
.cond
);
1630 exp_init_os (exp
->trinary
.lhs
);
1631 exp_init_os (exp
->trinary
.rhs
);
1635 exp_init_os (exp
->assert_s
.child
);
1639 exp_init_os (exp
->unary
.child
);
1643 switch (exp
->type
.node_code
)
1649 lang_output_section_statement_type
*os
;
1651 os
= lang_output_section_find (exp
->name
.name
);
1652 if (os
!= NULL
&& os
->bfd_section
== NULL
)
1664 section_already_linked (bfd
*abfd
, asection
*sec
, void *data
)
1666 lang_input_statement_type
*entry
= data
;
1668 /* If we are only reading symbols from this object, then we want to
1669 discard all sections. */
1670 if (entry
->just_syms_flag
)
1672 bfd_link_just_syms (abfd
, sec
, &link_info
);
1676 if (!(abfd
->flags
& DYNAMIC
))
1677 bfd_section_already_linked (abfd
, sec
);
1680 /* The wild routines.
1682 These expand statements like *(.text) and foo.o to a list of
1683 explicit actions, like foo.o(.text), bar.o(.text) and
1684 foo.o(.text, .data). */
1686 /* Add SECTION to the output section OUTPUT. Do this by creating a
1687 lang_input_section statement which is placed at PTR. FILE is the
1688 input file which holds SECTION. */
1691 lang_add_section (lang_statement_list_type
*ptr
,
1693 lang_output_section_statement_type
*output
,
1694 lang_input_statement_type
*file
)
1696 flagword flags
= section
->flags
;
1697 bfd_boolean discard
;
1699 /* Discard sections marked with SEC_EXCLUDE. */
1700 discard
= (flags
& SEC_EXCLUDE
) != 0;
1702 /* Discard input sections which are assigned to a section named
1703 DISCARD_SECTION_NAME. */
1704 if (strcmp (output
->name
, DISCARD_SECTION_NAME
) == 0)
1707 /* Discard debugging sections if we are stripping debugging
1709 if ((link_info
.strip
== strip_debugger
|| link_info
.strip
== strip_all
)
1710 && (flags
& SEC_DEBUGGING
) != 0)
1715 if (section
->output_section
== NULL
)
1717 /* This prevents future calls from assigning this section. */
1718 section
->output_section
= bfd_abs_section_ptr
;
1723 if (section
->output_section
== NULL
)
1726 lang_input_section_type
*new;
1729 if (output
->bfd_section
== NULL
)
1732 first
= ! output
->bfd_section
->linker_has_input
;
1733 output
->bfd_section
->linker_has_input
= 1;
1735 if (!link_info
.relocatable
1736 && !stripped_excluded_sections
)
1738 asection
*s
= output
->bfd_section
->map_tail
.s
;
1739 output
->bfd_section
->map_tail
.s
= section
;
1740 section
->map_head
.s
= NULL
;
1741 section
->map_tail
.s
= s
;
1743 s
->map_head
.s
= section
;
1745 output
->bfd_section
->map_head
.s
= section
;
1748 /* Add a section reference to the list. */
1749 new = new_stat (lang_input_section
, ptr
);
1751 new->section
= section
;
1753 section
->output_section
= output
->bfd_section
;
1755 flags
= section
->flags
;
1757 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1758 to an output section, because we want to be able to include a
1759 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1760 section (I don't know why we want to do this, but we do).
1761 build_link_order in ldwrite.c handles this case by turning
1762 the embedded SEC_NEVER_LOAD section into a fill. */
1764 flags
&= ~ SEC_NEVER_LOAD
;
1766 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1767 already been processed. One reason to do this is that on pe
1768 format targets, .text$foo sections go into .text and it's odd
1769 to see .text with SEC_LINK_ONCE set. */
1771 if (! link_info
.relocatable
)
1772 flags
&= ~ (SEC_LINK_ONCE
| SEC_LINK_DUPLICATES
);
1774 /* If this is not the first input section, and the SEC_READONLY
1775 flag is not currently set, then don't set it just because the
1776 input section has it set. */
1778 if (! first
&& (output
->bfd_section
->flags
& SEC_READONLY
) == 0)
1779 flags
&= ~ SEC_READONLY
;
1781 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1783 && ((output
->bfd_section
->flags
& (SEC_MERGE
| SEC_STRINGS
))
1784 != (flags
& (SEC_MERGE
| SEC_STRINGS
))
1785 || ((flags
& SEC_MERGE
)
1786 && output
->bfd_section
->entsize
!= section
->entsize
)))
1788 output
->bfd_section
->flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1789 flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1792 output
->bfd_section
->flags
|= flags
;
1794 if (flags
& SEC_MERGE
)
1795 output
->bfd_section
->entsize
= section
->entsize
;
1797 /* If SEC_READONLY is not set in the input section, then clear
1798 it from the output section. */
1799 if ((section
->flags
& SEC_READONLY
) == 0)
1800 output
->bfd_section
->flags
&= ~SEC_READONLY
;
1802 switch (output
->sectype
)
1804 case normal_section
:
1809 case overlay_section
:
1810 output
->bfd_section
->flags
&= ~SEC_ALLOC
;
1812 case noload_section
:
1813 output
->bfd_section
->flags
&= ~SEC_LOAD
;
1814 output
->bfd_section
->flags
|= SEC_NEVER_LOAD
;
1818 /* Copy over SEC_SMALL_DATA. */
1819 if (section
->flags
& SEC_SMALL_DATA
)
1820 output
->bfd_section
->flags
|= SEC_SMALL_DATA
;
1822 if (section
->alignment_power
> output
->bfd_section
->alignment_power
)
1823 output
->bfd_section
->alignment_power
= section
->alignment_power
;
1825 /* If supplied an alignment, then force it. */
1826 if (output
->section_alignment
!= -1)
1827 output
->bfd_section
->alignment_power
= output
->section_alignment
;
1829 if (bfd_get_arch (section
->owner
) == bfd_arch_tic54x
1830 && (section
->flags
& SEC_TIC54X_BLOCK
) != 0)
1832 output
->bfd_section
->flags
|= SEC_TIC54X_BLOCK
;
1833 /* FIXME: This value should really be obtained from the bfd... */
1834 output
->block_value
= 128;
1839 /* Compare sections ASEC and BSEC according to SORT. */
1842 compare_section (sort_type sort
, asection
*asec
, asection
*bsec
)
1851 case by_alignment_name
:
1852 ret
= (bfd_section_alignment (bsec
->owner
, bsec
)
1853 - bfd_section_alignment (asec
->owner
, asec
));
1859 ret
= strcmp (bfd_get_section_name (asec
->owner
, asec
),
1860 bfd_get_section_name (bsec
->owner
, bsec
));
1863 case by_name_alignment
:
1864 ret
= strcmp (bfd_get_section_name (asec
->owner
, asec
),
1865 bfd_get_section_name (bsec
->owner
, bsec
));
1871 ret
= (bfd_section_alignment (bsec
->owner
, bsec
)
1872 - bfd_section_alignment (asec
->owner
, asec
));
1879 /* Handle wildcard sorting. This returns the lang_input_section which
1880 should follow the one we are going to create for SECTION and FILE,
1881 based on the sorting requirements of WILD. It returns NULL if the
1882 new section should just go at the end of the current list. */
1884 static lang_statement_union_type
*
1885 wild_sort (lang_wild_statement_type
*wild
,
1886 struct wildcard_list
*sec
,
1887 lang_input_statement_type
*file
,
1890 const char *section_name
;
1891 lang_statement_union_type
*l
;
1893 if (!wild
->filenames_sorted
1894 && (sec
== NULL
|| sec
->spec
.sorted
== none
))
1897 section_name
= bfd_get_section_name (file
->the_bfd
, section
);
1898 for (l
= wild
->children
.head
; l
!= NULL
; l
= l
->header
.next
)
1900 lang_input_section_type
*ls
;
1902 if (l
->header
.type
!= lang_input_section_enum
)
1904 ls
= &l
->input_section
;
1906 /* Sorting by filename takes precedence over sorting by section
1909 if (wild
->filenames_sorted
)
1911 const char *fn
, *ln
;
1915 /* The PE support for the .idata section as generated by
1916 dlltool assumes that files will be sorted by the name of
1917 the archive and then the name of the file within the
1920 if (file
->the_bfd
!= NULL
1921 && bfd_my_archive (file
->the_bfd
) != NULL
)
1923 fn
= bfd_get_filename (bfd_my_archive (file
->the_bfd
));
1928 fn
= file
->filename
;
1932 if (ls
->ifile
->the_bfd
!= NULL
1933 && bfd_my_archive (ls
->ifile
->the_bfd
) != NULL
)
1935 ln
= bfd_get_filename (bfd_my_archive (ls
->ifile
->the_bfd
));
1940 ln
= ls
->ifile
->filename
;
1944 i
= strcmp (fn
, ln
);
1953 fn
= file
->filename
;
1955 ln
= ls
->ifile
->filename
;
1957 i
= strcmp (fn
, ln
);
1965 /* Here either the files are not sorted by name, or we are
1966 looking at the sections for this file. */
1968 if (sec
!= NULL
&& sec
->spec
.sorted
!= none
)
1969 if (compare_section (sec
->spec
.sorted
, section
, ls
->section
) < 0)
1976 /* Expand a wild statement for a particular FILE. SECTION may be
1977 NULL, in which case it is a wild card. */
1980 output_section_callback (lang_wild_statement_type
*ptr
,
1981 struct wildcard_list
*sec
,
1983 lang_input_statement_type
*file
,
1986 lang_statement_union_type
*before
;
1988 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1989 if (unique_section_p (section
))
1992 before
= wild_sort (ptr
, sec
, file
, section
);
1994 /* Here BEFORE points to the lang_input_section which
1995 should follow the one we are about to add. If BEFORE
1996 is NULL, then the section should just go at the end
1997 of the current list. */
2000 lang_add_section (&ptr
->children
, section
,
2001 (lang_output_section_statement_type
*) output
,
2005 lang_statement_list_type list
;
2006 lang_statement_union_type
**pp
;
2008 lang_list_init (&list
);
2009 lang_add_section (&list
, section
,
2010 (lang_output_section_statement_type
*) output
,
2013 /* If we are discarding the section, LIST.HEAD will
2015 if (list
.head
!= NULL
)
2017 ASSERT (list
.head
->header
.next
== NULL
);
2019 for (pp
= &ptr
->children
.head
;
2021 pp
= &(*pp
)->header
.next
)
2022 ASSERT (*pp
!= NULL
);
2024 list
.head
->header
.next
= *pp
;
2030 /* Check if all sections in a wild statement for a particular FILE
2034 check_section_callback (lang_wild_statement_type
*ptr ATTRIBUTE_UNUSED
,
2035 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
2037 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
2040 /* Exclude sections that match UNIQUE_SECTION_LIST. */
2041 if (unique_section_p (section
))
2044 if (section
->output_section
== NULL
&& (section
->flags
& SEC_READONLY
) == 0)
2045 ((lang_output_section_statement_type
*) data
)->all_input_readonly
= FALSE
;
2048 /* This is passed a file name which must have been seen already and
2049 added to the statement tree. We will see if it has been opened
2050 already and had its symbols read. If not then we'll read it. */
2052 static lang_input_statement_type
*
2053 lookup_name (const char *name
)
2055 lang_input_statement_type
*search
;
2057 for (search
= (lang_input_statement_type
*) input_file_chain
.head
;
2059 search
= (lang_input_statement_type
*) search
->next_real_file
)
2061 /* Use the local_sym_name as the name of the file that has
2062 already been loaded as filename might have been transformed
2063 via the search directory lookup mechanism. */
2064 const char * filename
= search
->local_sym_name
;
2066 if (filename
== NULL
&& name
== NULL
)
2068 if (filename
!= NULL
2070 && strcmp (filename
, name
) == 0)
2075 search
= new_afile (name
, lang_input_file_is_search_file_enum
,
2076 default_target
, FALSE
);
2078 /* If we have already added this file, or this file is not real
2079 (FIXME: can that ever actually happen?) or the name is NULL
2080 (FIXME: can that ever actually happen?) don't add this file. */
2083 || search
->filename
== NULL
)
2086 if (! load_symbols (search
, NULL
))
2092 /* Save LIST as a list of libraries whose symbols should not be exported. */
2097 struct excluded_lib
*next
;
2099 static struct excluded_lib
*excluded_libs
;
2102 add_excluded_libs (const char *list
)
2104 const char *p
= list
, *end
;
2108 struct excluded_lib
*entry
;
2109 end
= strpbrk (p
, ",:");
2111 end
= p
+ strlen (p
);
2112 entry
= xmalloc (sizeof (*entry
));
2113 entry
->next
= excluded_libs
;
2114 entry
->name
= xmalloc (end
- p
+ 1);
2115 memcpy (entry
->name
, p
, end
- p
);
2116 entry
->name
[end
- p
] = '\0';
2117 excluded_libs
= entry
;
2125 check_excluded_libs (bfd
*abfd
)
2127 struct excluded_lib
*lib
= excluded_libs
;
2131 int len
= strlen (lib
->name
);
2132 const char *filename
= lbasename (abfd
->filename
);
2134 if (strcmp (lib
->name
, "ALL") == 0)
2136 abfd
->no_export
= TRUE
;
2140 if (strncmp (lib
->name
, filename
, len
) == 0
2141 && (filename
[len
] == '\0'
2142 || (filename
[len
] == '.' && filename
[len
+ 1] == 'a'
2143 && filename
[len
+ 2] == '\0')))
2145 abfd
->no_export
= TRUE
;
2153 /* Get the symbols for an input file. */
2156 load_symbols (lang_input_statement_type
*entry
,
2157 lang_statement_list_type
*place
)
2164 ldfile_open_file (entry
);
2166 if (! bfd_check_format (entry
->the_bfd
, bfd_archive
)
2167 && ! bfd_check_format_matches (entry
->the_bfd
, bfd_object
, &matching
))
2170 lang_statement_list_type
*hold
;
2171 bfd_boolean bad_load
= TRUE
;
2172 bfd_boolean save_ldlang_sysrooted_script
;
2174 err
= bfd_get_error ();
2176 /* See if the emulation has some special knowledge. */
2177 if (ldemul_unrecognized_file (entry
))
2180 if (err
== bfd_error_file_ambiguously_recognized
)
2184 einfo (_("%B: file not recognized: %E\n"), entry
->the_bfd
);
2185 einfo (_("%B: matching formats:"), entry
->the_bfd
);
2186 for (p
= matching
; *p
!= NULL
; p
++)
2190 else if (err
!= bfd_error_file_not_recognized
2192 einfo (_("%F%B: file not recognized: %E\n"), entry
->the_bfd
);
2196 bfd_close (entry
->the_bfd
);
2197 entry
->the_bfd
= NULL
;
2199 /* Try to interpret the file as a linker script. */
2200 ldfile_open_command_file (entry
->filename
);
2204 save_ldlang_sysrooted_script
= ldlang_sysrooted_script
;
2205 ldlang_sysrooted_script
= entry
->sysrooted
;
2207 ldfile_assumed_script
= TRUE
;
2208 parser_input
= input_script
;
2209 /* We want to use the same -Bdynamic/-Bstatic as the one for
2211 config
.dynamic_link
= entry
->dynamic
;
2213 ldfile_assumed_script
= FALSE
;
2215 ldlang_sysrooted_script
= save_ldlang_sysrooted_script
;
2221 if (ldemul_recognized_file (entry
))
2224 /* We don't call ldlang_add_file for an archive. Instead, the
2225 add_symbols entry point will call ldlang_add_file, via the
2226 add_archive_element callback, for each element of the archive
2228 switch (bfd_get_format (entry
->the_bfd
))
2234 ldlang_add_file (entry
);
2235 if (trace_files
|| trace_file_tries
)
2236 info_msg ("%I\n", entry
);
2240 check_excluded_libs (entry
->the_bfd
);
2242 if (entry
->whole_archive
)
2245 bfd_boolean loaded
= TRUE
;
2249 member
= bfd_openr_next_archived_file (entry
->the_bfd
, member
);
2254 if (! bfd_check_format (member
, bfd_object
))
2256 einfo (_("%F%B: member %B in archive is not an object\n"),
2257 entry
->the_bfd
, member
);
2261 if (! ((*link_info
.callbacks
->add_archive_element
)
2262 (&link_info
, member
, "--whole-archive")))
2265 if (! bfd_link_add_symbols (member
, &link_info
))
2267 einfo (_("%F%B: could not read symbols: %E\n"), member
);
2272 entry
->loaded
= loaded
;
2278 if (bfd_link_add_symbols (entry
->the_bfd
, &link_info
))
2279 entry
->loaded
= TRUE
;
2281 einfo (_("%F%B: could not read symbols: %E\n"), entry
->the_bfd
);
2283 return entry
->loaded
;
2286 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
2287 may be NULL, indicating that it is a wildcard. Separate
2288 lang_input_section statements are created for each part of the
2289 expansion; they are added after the wild statement S. OUTPUT is
2290 the output section. */
2293 wild (lang_wild_statement_type
*s
,
2294 const char *target ATTRIBUTE_UNUSED
,
2295 lang_output_section_statement_type
*output
)
2297 struct wildcard_list
*sec
;
2299 walk_wild (s
, output_section_callback
, output
);
2301 for (sec
= s
->section_list
; sec
!= NULL
; sec
= sec
->next
)
2303 if (default_common_section
!= NULL
)
2305 if (sec
->spec
.name
!= NULL
&& strcmp (sec
->spec
.name
, "COMMON") == 0)
2307 /* Remember the section that common is going to in case we
2308 later get something which doesn't know where to put it. */
2309 default_common_section
= output
;
2314 /* Return TRUE iff target is the sought target. */
2317 get_target (const bfd_target
*target
, void *data
)
2319 const char *sought
= data
;
2321 return strcmp (target
->name
, sought
) == 0;
2324 /* Like strcpy() but convert to lower case as well. */
2327 stricpy (char *dest
, char *src
)
2331 while ((c
= *src
++) != 0)
2332 *dest
++ = TOLOWER (c
);
2337 /* Remove the first occurrence of needle (if any) in haystack
2341 strcut (char *haystack
, char *needle
)
2343 haystack
= strstr (haystack
, needle
);
2349 for (src
= haystack
+ strlen (needle
); *src
;)
2350 *haystack
++ = *src
++;
2356 /* Compare two target format name strings.
2357 Return a value indicating how "similar" they are. */
2360 name_compare (char *first
, char *second
)
2366 copy1
= xmalloc (strlen (first
) + 1);
2367 copy2
= xmalloc (strlen (second
) + 1);
2369 /* Convert the names to lower case. */
2370 stricpy (copy1
, first
);
2371 stricpy (copy2
, second
);
2373 /* Remove size and endian strings from the name. */
2374 strcut (copy1
, "big");
2375 strcut (copy1
, "little");
2376 strcut (copy2
, "big");
2377 strcut (copy2
, "little");
2379 /* Return a value based on how many characters match,
2380 starting from the beginning. If both strings are
2381 the same then return 10 * their length. */
2382 for (result
= 0; copy1
[result
] == copy2
[result
]; result
++)
2383 if (copy1
[result
] == 0)
2395 /* Set by closest_target_match() below. */
2396 static const bfd_target
*winner
;
2398 /* Scan all the valid bfd targets looking for one that has the endianness
2399 requirement that was specified on the command line, and is the nearest
2400 match to the original output target. */
2403 closest_target_match (const bfd_target
*target
, void *data
)
2405 const bfd_target
*original
= data
;
2407 if (command_line
.endian
== ENDIAN_BIG
2408 && target
->byteorder
!= BFD_ENDIAN_BIG
)
2411 if (command_line
.endian
== ENDIAN_LITTLE
2412 && target
->byteorder
!= BFD_ENDIAN_LITTLE
)
2415 /* Must be the same flavour. */
2416 if (target
->flavour
!= original
->flavour
)
2419 /* If we have not found a potential winner yet, then record this one. */
2426 /* Oh dear, we now have two potential candidates for a successful match.
2427 Compare their names and choose the better one. */
2428 if (name_compare (target
->name
, original
->name
)
2429 > name_compare (winner
->name
, original
->name
))
2432 /* Keep on searching until wqe have checked them all. */
2436 /* Return the BFD target format of the first input file. */
2439 get_first_input_target (void)
2441 char *target
= NULL
;
2443 LANG_FOR_EACH_INPUT_STATEMENT (s
)
2445 if (s
->header
.type
== lang_input_statement_enum
2448 ldfile_open_file (s
);
2450 if (s
->the_bfd
!= NULL
2451 && bfd_check_format (s
->the_bfd
, bfd_object
))
2453 target
= bfd_get_target (s
->the_bfd
);
2465 lang_get_output_target (void)
2469 /* Has the user told us which output format to use? */
2470 if (output_target
!= NULL
)
2471 return output_target
;
2473 /* No - has the current target been set to something other than
2475 if (current_target
!= default_target
)
2476 return current_target
;
2478 /* No - can we determine the format of the first input file? */
2479 target
= get_first_input_target ();
2483 /* Failed - use the default output target. */
2484 return default_target
;
2487 /* Open the output file. */
2490 open_output (const char *name
)
2494 output_target
= lang_get_output_target ();
2496 /* Has the user requested a particular endianness on the command
2498 if (command_line
.endian
!= ENDIAN_UNSET
)
2500 const bfd_target
*target
;
2501 enum bfd_endian desired_endian
;
2503 /* Get the chosen target. */
2504 target
= bfd_search_for_target (get_target
, (void *) output_target
);
2506 /* If the target is not supported, we cannot do anything. */
2509 if (command_line
.endian
== ENDIAN_BIG
)
2510 desired_endian
= BFD_ENDIAN_BIG
;
2512 desired_endian
= BFD_ENDIAN_LITTLE
;
2514 /* See if the target has the wrong endianness. This should
2515 not happen if the linker script has provided big and
2516 little endian alternatives, but some scrips don't do
2518 if (target
->byteorder
!= desired_endian
)
2520 /* If it does, then see if the target provides
2521 an alternative with the correct endianness. */
2522 if (target
->alternative_target
!= NULL
2523 && (target
->alternative_target
->byteorder
== desired_endian
))
2524 output_target
= target
->alternative_target
->name
;
2527 /* Try to find a target as similar as possible to
2528 the default target, but which has the desired
2529 endian characteristic. */
2530 bfd_search_for_target (closest_target_match
,
2533 /* Oh dear - we could not find any targets that
2534 satisfy our requirements. */
2536 einfo (_("%P: warning: could not find any targets"
2537 " that match endianness requirement\n"));
2539 output_target
= winner
->name
;
2545 output
= bfd_openw (name
, output_target
);
2549 if (bfd_get_error () == bfd_error_invalid_target
)
2550 einfo (_("%P%F: target %s not found\n"), output_target
);
2552 einfo (_("%P%F: cannot open output file %s: %E\n"), name
);
2555 delete_output_file_on_failure
= TRUE
;
2557 if (! bfd_set_format (output
, bfd_object
))
2558 einfo (_("%P%F:%s: can not make object file: %E\n"), name
);
2559 if (! bfd_set_arch_mach (output
,
2560 ldfile_output_architecture
,
2561 ldfile_output_machine
))
2562 einfo (_("%P%F:%s: can not set architecture: %E\n"), name
);
2564 link_info
.hash
= bfd_link_hash_table_create (output
);
2565 if (link_info
.hash
== NULL
)
2566 einfo (_("%P%F: can not create link hash table: %E\n"));
2568 bfd_set_gp_size (output
, g_switch_value
);
2573 ldlang_open_output (lang_statement_union_type
*statement
)
2575 switch (statement
->header
.type
)
2577 case lang_output_statement_enum
:
2578 ASSERT (output_bfd
== NULL
);
2579 output_bfd
= open_output (statement
->output_statement
.name
);
2580 ldemul_set_output_arch ();
2581 if (config
.magic_demand_paged
&& !link_info
.relocatable
)
2582 output_bfd
->flags
|= D_PAGED
;
2584 output_bfd
->flags
&= ~D_PAGED
;
2585 if (config
.text_read_only
)
2586 output_bfd
->flags
|= WP_TEXT
;
2588 output_bfd
->flags
&= ~WP_TEXT
;
2589 if (link_info
.traditional_format
)
2590 output_bfd
->flags
|= BFD_TRADITIONAL_FORMAT
;
2592 output_bfd
->flags
&= ~BFD_TRADITIONAL_FORMAT
;
2595 case lang_target_statement_enum
:
2596 current_target
= statement
->target_statement
.target
;
2603 /* Convert between addresses in bytes and sizes in octets.
2604 For currently supported targets, octets_per_byte is always a power
2605 of two, so we can use shifts. */
2606 #define TO_ADDR(X) ((X) >> opb_shift)
2607 #define TO_SIZE(X) ((X) << opb_shift)
2609 /* Support the above. */
2610 static unsigned int opb_shift
= 0;
2615 unsigned x
= bfd_arch_mach_octets_per_byte (ldfile_output_architecture
,
2616 ldfile_output_machine
);
2619 while ((x
& 1) == 0)
2627 /* Open all the input files. */
2630 open_input_bfds (lang_statement_union_type
*s
, bfd_boolean force
)
2632 for (; s
!= NULL
; s
= s
->header
.next
)
2634 switch (s
->header
.type
)
2636 case lang_constructors_statement_enum
:
2637 open_input_bfds (constructor_list
.head
, force
);
2639 case lang_output_section_statement_enum
:
2640 open_input_bfds (s
->output_section_statement
.children
.head
, force
);
2642 case lang_wild_statement_enum
:
2643 /* Maybe we should load the file's symbols. */
2644 if (s
->wild_statement
.filename
2645 && ! wildcardp (s
->wild_statement
.filename
))
2646 lookup_name (s
->wild_statement
.filename
);
2647 open_input_bfds (s
->wild_statement
.children
.head
, force
);
2649 case lang_group_statement_enum
:
2651 struct bfd_link_hash_entry
*undefs
;
2653 /* We must continually search the entries in the group
2654 until no new symbols are added to the list of undefined
2659 undefs
= link_info
.hash
->undefs_tail
;
2660 open_input_bfds (s
->group_statement
.children
.head
, TRUE
);
2662 while (undefs
!= link_info
.hash
->undefs_tail
);
2665 case lang_target_statement_enum
:
2666 current_target
= s
->target_statement
.target
;
2668 case lang_input_statement_enum
:
2669 if (s
->input_statement
.real
)
2671 lang_statement_list_type add
;
2673 s
->input_statement
.target
= current_target
;
2675 /* If we are being called from within a group, and this
2676 is an archive which has already been searched, then
2677 force it to be researched unless the whole archive
2678 has been loaded already. */
2680 && !s
->input_statement
.whole_archive
2681 && s
->input_statement
.loaded
2682 && bfd_check_format (s
->input_statement
.the_bfd
,
2684 s
->input_statement
.loaded
= FALSE
;
2686 lang_list_init (&add
);
2688 if (! load_symbols (&s
->input_statement
, &add
))
2689 config
.make_executable
= FALSE
;
2691 if (add
.head
!= NULL
)
2693 *add
.tail
= s
->header
.next
;
2694 s
->header
.next
= add
.head
;
2704 /* Add a symbol to a hash of symbols used in DEFINED (NAME) expressions. */
2707 lang_track_definedness (const char *name
)
2709 if (bfd_hash_lookup (&lang_definedness_table
, name
, TRUE
, FALSE
) == NULL
)
2710 einfo (_("%P%F: bfd_hash_lookup failed creating symbol %s\n"), name
);
2713 /* New-function for the definedness hash table. */
2715 static struct bfd_hash_entry
*
2716 lang_definedness_newfunc (struct bfd_hash_entry
*entry
,
2717 struct bfd_hash_table
*table ATTRIBUTE_UNUSED
,
2718 const char *name ATTRIBUTE_UNUSED
)
2720 struct lang_definedness_hash_entry
*ret
2721 = (struct lang_definedness_hash_entry
*) entry
;
2724 ret
= (struct lang_definedness_hash_entry
*)
2725 bfd_hash_allocate (table
, sizeof (struct lang_definedness_hash_entry
));
2728 einfo (_("%P%F: bfd_hash_allocate failed creating symbol %s\n"), name
);
2730 ret
->iteration
= -1;
2734 /* Return the iteration when the definition of NAME was last updated. A
2735 value of -1 means that the symbol is not defined in the linker script
2736 or the command line, but may be defined in the linker symbol table. */
2739 lang_symbol_definition_iteration (const char *name
)
2741 struct lang_definedness_hash_entry
*defentry
2742 = (struct lang_definedness_hash_entry
*)
2743 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2745 /* We've already created this one on the presence of DEFINED in the
2746 script, so it can't be NULL unless something is borked elsewhere in
2748 if (defentry
== NULL
)
2751 return defentry
->iteration
;
2754 /* Update the definedness state of NAME. */
2757 lang_update_definedness (const char *name
, struct bfd_link_hash_entry
*h
)
2759 struct lang_definedness_hash_entry
*defentry
2760 = (struct lang_definedness_hash_entry
*)
2761 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
2763 /* We don't keep track of symbols not tested with DEFINED. */
2764 if (defentry
== NULL
)
2767 /* If the symbol was already defined, and not from an earlier statement
2768 iteration, don't update the definedness iteration, because that'd
2769 make the symbol seem defined in the linker script at this point, and
2770 it wasn't; it was defined in some object. If we do anyway, DEFINED
2771 would start to yield false before this point and the construct "sym =
2772 DEFINED (sym) ? sym : X;" would change sym to X despite being defined
2774 if (h
->type
!= bfd_link_hash_undefined
2775 && h
->type
!= bfd_link_hash_common
2776 && h
->type
!= bfd_link_hash_new
2777 && defentry
->iteration
== -1)
2780 defentry
->iteration
= lang_statement_iteration
;
2783 /* Add the supplied name to the symbol table as an undefined reference.
2784 This is a two step process as the symbol table doesn't even exist at
2785 the time the ld command line is processed. First we put the name
2786 on a list, then, once the output file has been opened, transfer the
2787 name to the symbol table. */
2789 typedef struct bfd_sym_chain ldlang_undef_chain_list_type
;
2791 #define ldlang_undef_chain_list_head entry_symbol.next
2794 ldlang_add_undef (const char *const name
)
2796 ldlang_undef_chain_list_type
*new =
2797 stat_alloc (sizeof (ldlang_undef_chain_list_type
));
2799 new->next
= ldlang_undef_chain_list_head
;
2800 ldlang_undef_chain_list_head
= new;
2802 new->name
= xstrdup (name
);
2804 if (output_bfd
!= NULL
)
2805 insert_undefined (new->name
);
2808 /* Insert NAME as undefined in the symbol table. */
2811 insert_undefined (const char *name
)
2813 struct bfd_link_hash_entry
*h
;
2815 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, FALSE
, TRUE
);
2817 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2818 if (h
->type
== bfd_link_hash_new
)
2820 h
->type
= bfd_link_hash_undefined
;
2821 h
->u
.undef
.abfd
= NULL
;
2822 bfd_link_add_undef (link_info
.hash
, h
);
2826 /* Run through the list of undefineds created above and place them
2827 into the linker hash table as undefined symbols belonging to the
2831 lang_place_undefineds (void)
2833 ldlang_undef_chain_list_type
*ptr
;
2835 for (ptr
= ldlang_undef_chain_list_head
; ptr
!= NULL
; ptr
= ptr
->next
)
2836 insert_undefined (ptr
->name
);
2839 /* Check for all readonly or some readwrite sections. */
2842 check_input_sections
2843 (lang_statement_union_type
*s
,
2844 lang_output_section_statement_type
*output_section_statement
)
2846 for (; s
!= (lang_statement_union_type
*) NULL
; s
= s
->header
.next
)
2848 switch (s
->header
.type
)
2850 case lang_wild_statement_enum
:
2851 walk_wild (&s
->wild_statement
, check_section_callback
,
2852 output_section_statement
);
2853 if (! output_section_statement
->all_input_readonly
)
2856 case lang_constructors_statement_enum
:
2857 check_input_sections (constructor_list
.head
,
2858 output_section_statement
);
2859 if (! output_section_statement
->all_input_readonly
)
2862 case lang_group_statement_enum
:
2863 check_input_sections (s
->group_statement
.children
.head
,
2864 output_section_statement
);
2865 if (! output_section_statement
->all_input_readonly
)
2874 /* Update wildcard statements if needed. */
2877 update_wild_statements (lang_statement_union_type
*s
)
2879 struct wildcard_list
*sec
;
2881 switch (sort_section
)
2891 for (; s
!= NULL
; s
= s
->header
.next
)
2893 switch (s
->header
.type
)
2898 case lang_wild_statement_enum
:
2899 sec
= s
->wild_statement
.section_list
;
2902 switch (sec
->spec
.sorted
)
2905 sec
->spec
.sorted
= sort_section
;
2908 if (sort_section
== by_alignment
)
2909 sec
->spec
.sorted
= by_name_alignment
;
2912 if (sort_section
== by_name
)
2913 sec
->spec
.sorted
= by_alignment_name
;
2921 case lang_constructors_statement_enum
:
2922 update_wild_statements (constructor_list
.head
);
2925 case lang_output_section_statement_enum
:
2926 update_wild_statements
2927 (s
->output_section_statement
.children
.head
);
2930 case lang_group_statement_enum
:
2931 update_wild_statements (s
->group_statement
.children
.head
);
2939 /* Open input files and attach to output sections. */
2942 map_input_to_output_sections
2943 (lang_statement_union_type
*s
, const char *target
,
2944 lang_output_section_statement_type
*os
)
2946 for (; s
!= NULL
; s
= s
->header
.next
)
2948 switch (s
->header
.type
)
2950 case lang_wild_statement_enum
:
2951 wild (&s
->wild_statement
, target
, os
);
2953 case lang_constructors_statement_enum
:
2954 map_input_to_output_sections (constructor_list
.head
,
2958 case lang_output_section_statement_enum
:
2959 if (s
->output_section_statement
.constraint
)
2961 if (s
->output_section_statement
.constraint
!= ONLY_IF_RW
2962 && s
->output_section_statement
.constraint
!= ONLY_IF_RO
)
2964 s
->output_section_statement
.all_input_readonly
= TRUE
;
2965 check_input_sections (s
->output_section_statement
.children
.head
,
2966 &s
->output_section_statement
);
2967 if ((s
->output_section_statement
.all_input_readonly
2968 && s
->output_section_statement
.constraint
== ONLY_IF_RW
)
2969 || (!s
->output_section_statement
.all_input_readonly
2970 && s
->output_section_statement
.constraint
== ONLY_IF_RO
))
2972 s
->output_section_statement
.constraint
= -1;
2977 map_input_to_output_sections (s
->output_section_statement
.children
.head
,
2979 &s
->output_section_statement
);
2981 case lang_output_statement_enum
:
2983 case lang_target_statement_enum
:
2984 target
= s
->target_statement
.target
;
2986 case lang_group_statement_enum
:
2987 map_input_to_output_sections (s
->group_statement
.children
.head
,
2991 case lang_data_statement_enum
:
2992 /* Make sure that any sections mentioned in the expression
2994 exp_init_os (s
->data_statement
.exp
);
2995 if (os
!= NULL
&& os
->bfd_section
== NULL
)
2997 /* The output section gets contents, and then we inspect for
2998 any flags set in the input script which override any ALLOC. */
2999 os
->bfd_section
->flags
|= SEC_HAS_CONTENTS
;
3000 if (!(os
->flags
& SEC_NEVER_LOAD
))
3001 os
->bfd_section
->flags
|= SEC_ALLOC
| SEC_LOAD
;
3003 case lang_fill_statement_enum
:
3004 case lang_input_section_enum
:
3005 case lang_object_symbols_statement_enum
:
3006 case lang_reloc_statement_enum
:
3007 case lang_padding_statement_enum
:
3008 case lang_input_statement_enum
:
3009 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3012 case lang_assignment_statement_enum
:
3013 if (os
!= NULL
&& os
->bfd_section
== NULL
)
3016 /* Make sure that any sections mentioned in the assignment
3018 exp_init_os (s
->assignment_statement
.exp
);
3020 case lang_afile_asection_pair_statement_enum
:
3023 case lang_address_statement_enum
:
3024 /* Mark the specified section with the supplied address.
3026 If this section was actually a segment marker, then the
3027 directive is ignored if the linker script explicitly
3028 processed the segment marker. Originally, the linker
3029 treated segment directives (like -Ttext on the
3030 command-line) as section directives. We honor the
3031 section directive semantics for backwards compatibilty;
3032 linker scripts that do not specifically check for
3033 SEGMENT_START automatically get the old semantics. */
3034 if (!s
->address_statement
.segment
3035 || !s
->address_statement
.segment
->used
)
3037 lang_output_section_statement_type
*aos
3038 = (lang_output_section_statement_lookup
3039 (s
->address_statement
.section_name
));
3041 if (aos
->bfd_section
== NULL
)
3043 aos
->addr_tree
= s
->address_statement
.address
;
3050 /* An output section might have been removed after its statement was
3051 added. For example, ldemul_before_allocation can remove dynamic
3052 sections if they turn out to be not needed. Clean them up here. */
3055 strip_excluded_output_sections (void)
3057 lang_output_section_statement_type
*os
;
3059 /* Run lang_size_sections (if not already done). */
3060 if (expld
.phase
!= lang_mark_phase_enum
)
3062 expld
.phase
= lang_mark_phase_enum
;
3063 expld
.dataseg
.phase
= exp_dataseg_none
;
3064 one_lang_size_sections_pass (NULL
, FALSE
);
3065 lang_reset_memory_regions ();
3068 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
3072 asection
*output_section
;
3073 bfd_boolean exclude
;
3075 if (os
->constraint
== -1)
3078 output_section
= os
->bfd_section
;
3079 if (output_section
== NULL
)
3082 exclude
= (output_section
->rawsize
== 0
3083 && (output_section
->flags
& SEC_KEEP
) == 0
3084 && !bfd_section_removed_from_list (output_bfd
,
3087 /* Some sections have not yet been sized, notably .gnu.version,
3088 .dynsym, .dynstr and .hash. These all have SEC_LINKER_CREATED
3089 input sections, so don't drop output sections that have such
3090 input sections unless they are also marked SEC_EXCLUDE. */
3091 if (exclude
&& output_section
->map_head
.s
!= NULL
)
3095 for (s
= output_section
->map_head
.s
; s
!= NULL
; s
= s
->map_head
.s
)
3096 if ((s
->flags
& SEC_LINKER_CREATED
) != 0
3097 && (s
->flags
& SEC_EXCLUDE
) == 0)
3104 /* TODO: Don't just junk map_head.s, turn them into link_orders. */
3105 output_section
->map_head
.link_order
= NULL
;
3106 output_section
->map_tail
.link_order
= NULL
;
3110 /* We don't set bfd_section to NULL since bfd_section of the
3111 removed output section statement may still be used. */
3113 output_section
->flags
|= SEC_EXCLUDE
;
3114 bfd_section_list_remove (output_bfd
, output_section
);
3115 output_bfd
->section_count
--;
3119 /* Stop future calls to lang_add_section from messing with map_head
3120 and map_tail link_order fields. */
3121 stripped_excluded_sections
= TRUE
;
3125 print_output_section_statement
3126 (lang_output_section_statement_type
*output_section_statement
)
3128 asection
*section
= output_section_statement
->bfd_section
;
3131 if (output_section_statement
!= abs_output_section
)
3133 minfo ("\n%s", output_section_statement
->name
);
3135 if (section
!= NULL
)
3137 print_dot
= section
->vma
;
3139 len
= strlen (output_section_statement
->name
);
3140 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
3145 while (len
< SECTION_NAME_MAP_LENGTH
)
3151 minfo ("0x%V %W", section
->vma
, section
->size
);
3153 if (output_section_statement
->load_base
!= NULL
)
3157 addr
= exp_get_abs_int (output_section_statement
->load_base
, 0,
3159 minfo (_(" load address 0x%V"), addr
);
3166 print_statement_list (output_section_statement
->children
.head
,
3167 output_section_statement
);
3170 /* Scan for the use of the destination in the right hand side
3171 of an expression. In such cases we will not compute the
3172 correct expression, since the value of DST that is used on
3173 the right hand side will be its final value, not its value
3174 just before this expression is evaluated. */
3177 scan_for_self_assignment (const char * dst
, etree_type
* rhs
)
3179 if (rhs
== NULL
|| dst
== NULL
)
3182 switch (rhs
->type
.node_class
)
3185 return scan_for_self_assignment (dst
, rhs
->binary
.lhs
)
3186 || scan_for_self_assignment (dst
, rhs
->binary
.rhs
);
3189 return scan_for_self_assignment (dst
, rhs
->trinary
.lhs
)
3190 || scan_for_self_assignment (dst
, rhs
->trinary
.rhs
);
3193 case etree_provided
:
3195 if (strcmp (dst
, rhs
->assign
.dst
) == 0)
3197 return scan_for_self_assignment (dst
, rhs
->assign
.src
);
3200 return scan_for_self_assignment (dst
, rhs
->unary
.child
);
3204 return strcmp (dst
, rhs
->value
.str
) == 0;
3209 return strcmp (dst
, rhs
->name
.name
) == 0;
3221 print_assignment (lang_assignment_statement_type
*assignment
,
3222 lang_output_section_statement_type
*output_section
)
3226 bfd_boolean computation_is_valid
= TRUE
;
3229 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3232 if (assignment
->exp
->type
.node_class
== etree_assert
)
3235 tree
= assignment
->exp
->assert_s
.child
;
3236 computation_is_valid
= TRUE
;
3240 const char *dst
= assignment
->exp
->assign
.dst
;
3242 is_dot
= (dst
[0] == '.' && dst
[1] == 0);
3243 tree
= assignment
->exp
->assign
.src
;
3244 computation_is_valid
= is_dot
|| (scan_for_self_assignment (dst
, tree
) == FALSE
);
3247 exp_fold_tree (tree
, output_section
->bfd_section
, &print_dot
);
3248 if (expld
.result
.valid_p
)
3252 if (computation_is_valid
)
3254 value
= expld
.result
.value
;
3256 if (expld
.result
.section
)
3257 value
+= expld
.result
.section
->vma
;
3259 minfo ("0x%V", value
);
3265 struct bfd_link_hash_entry
*h
;
3267 h
= bfd_link_hash_lookup (link_info
.hash
, assignment
->exp
->assign
.dst
,
3268 FALSE
, FALSE
, TRUE
);
3271 value
= h
->u
.def
.value
;
3273 if (expld
.result
.section
)
3274 value
+= expld
.result
.section
->vma
;
3276 minfo ("[0x%V]", value
);
3279 minfo ("[unresolved]");
3291 exp_print_tree (assignment
->exp
);
3296 print_input_statement (lang_input_statement_type
*statm
)
3298 if (statm
->filename
!= NULL
)
3300 fprintf (config
.map_file
, "LOAD %s\n", statm
->filename
);
3304 /* Print all symbols defined in a particular section. This is called
3305 via bfd_link_hash_traverse, or by print_all_symbols. */
3308 print_one_symbol (struct bfd_link_hash_entry
*hash_entry
, void *ptr
)
3310 asection
*sec
= ptr
;
3312 if ((hash_entry
->type
== bfd_link_hash_defined
3313 || hash_entry
->type
== bfd_link_hash_defweak
)
3314 && sec
== hash_entry
->u
.def
.section
)
3318 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3321 (hash_entry
->u
.def
.value
3322 + hash_entry
->u
.def
.section
->output_offset
3323 + hash_entry
->u
.def
.section
->output_section
->vma
));
3325 minfo (" %T\n", hash_entry
->root
.string
);
3332 print_all_symbols (sec
)
3335 struct fat_user_section_struct
*ud
= get_userdata (sec
);
3336 struct map_symbol_def
*def
;
3341 *ud
->map_symbol_def_tail
= 0;
3342 for (def
= ud
->map_symbol_def_head
; def
; def
= def
->next
)
3343 print_one_symbol (def
->entry
, sec
);
3346 /* Print information about an input section to the map file. */
3349 print_input_section (lang_input_section_type
*in
)
3351 asection
*i
= in
->section
;
3352 bfd_size_type size
= i
->size
;
3361 minfo ("%s", i
->name
);
3363 len
= 1 + strlen (i
->name
);
3364 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
3369 while (len
< SECTION_NAME_MAP_LENGTH
)
3375 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3376 addr
= i
->output_section
->vma
+ i
->output_offset
;
3383 minfo ("0x%V %W %B\n", addr
, TO_ADDR (size
), i
->owner
);
3385 if (size
!= i
->rawsize
&& i
->rawsize
!= 0)
3387 len
= SECTION_NAME_MAP_LENGTH
+ 3;
3399 minfo (_("%W (size before relaxing)\n"), i
->rawsize
);
3402 if (i
->output_section
!= NULL
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3404 if (command_line
.reduce_memory_overheads
)
3405 bfd_link_hash_traverse (link_info
.hash
, print_one_symbol
, i
);
3407 print_all_symbols (i
);
3409 print_dot
= addr
+ TO_ADDR (size
);
3415 print_fill_statement (lang_fill_statement_type
*fill
)
3419 fputs (" FILL mask 0x", config
.map_file
);
3420 for (p
= fill
->fill
->data
, size
= fill
->fill
->size
; size
!= 0; p
++, size
--)
3421 fprintf (config
.map_file
, "%02x", *p
);
3422 fputs ("\n", config
.map_file
);
3426 print_data_statement (lang_data_statement_type
*data
)
3434 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3437 addr
= data
->output_vma
;
3438 if (data
->output_section
!= NULL
)
3439 addr
+= data
->output_section
->vma
;
3467 minfo ("0x%V %W %s 0x%v", addr
, size
, name
, data
->value
);
3469 if (data
->exp
->type
.node_class
!= etree_value
)
3472 exp_print_tree (data
->exp
);
3477 print_dot
= addr
+ TO_ADDR (size
);
3480 /* Print an address statement. These are generated by options like
3484 print_address_statement (lang_address_statement_type
*address
)
3486 minfo (_("Address of section %s set to "), address
->section_name
);
3487 exp_print_tree (address
->address
);
3491 /* Print a reloc statement. */
3494 print_reloc_statement (lang_reloc_statement_type
*reloc
)
3501 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
3504 addr
= reloc
->output_vma
;
3505 if (reloc
->output_section
!= NULL
)
3506 addr
+= reloc
->output_section
->vma
;
3508 size
= bfd_get_reloc_size (reloc
->howto
);
3510 minfo ("0x%V %W RELOC %s ", addr
, size
, reloc
->howto
->name
);
3512 if (reloc
->name
!= NULL
)
3513 minfo ("%s+", reloc
->name
);
3515 minfo ("%s+", reloc
->section
->name
);
3517 exp_print_tree (reloc
->addend_exp
);
3521 print_dot
= addr
+ TO_ADDR (size
);
3525 print_padding_statement (lang_padding_statement_type
*s
)
3533 len
= sizeof " *fill*" - 1;
3534 while (len
< SECTION_NAME_MAP_LENGTH
)
3540 addr
= s
->output_offset
;
3541 if (s
->output_section
!= NULL
)
3542 addr
+= s
->output_section
->vma
;
3543 minfo ("0x%V %W ", addr
, (bfd_vma
) s
->size
);
3545 if (s
->fill
->size
!= 0)
3549 for (p
= s
->fill
->data
, size
= s
->fill
->size
; size
!= 0; p
++, size
--)
3550 fprintf (config
.map_file
, "%02x", *p
);
3555 print_dot
= addr
+ TO_ADDR (s
->size
);
3559 print_wild_statement (lang_wild_statement_type
*w
,
3560 lang_output_section_statement_type
*os
)
3562 struct wildcard_list
*sec
;
3566 if (w
->filenames_sorted
)
3568 if (w
->filename
!= NULL
)
3569 minfo ("%s", w
->filename
);
3572 if (w
->filenames_sorted
)
3576 for (sec
= w
->section_list
; sec
; sec
= sec
->next
)
3578 if (sec
->spec
.sorted
)
3580 if (sec
->spec
.exclude_name_list
!= NULL
)
3583 minfo ("EXCLUDE_FILE(%s", sec
->spec
.exclude_name_list
->name
);
3584 for (tmp
= sec
->spec
.exclude_name_list
->next
; tmp
; tmp
= tmp
->next
)
3585 minfo (" %s", tmp
->name
);
3588 if (sec
->spec
.name
!= NULL
)
3589 minfo ("%s", sec
->spec
.name
);
3592 if (sec
->spec
.sorted
)
3601 print_statement_list (w
->children
.head
, os
);
3604 /* Print a group statement. */
3607 print_group (lang_group_statement_type
*s
,
3608 lang_output_section_statement_type
*os
)
3610 fprintf (config
.map_file
, "START GROUP\n");
3611 print_statement_list (s
->children
.head
, os
);
3612 fprintf (config
.map_file
, "END GROUP\n");
3615 /* Print the list of statements in S.
3616 This can be called for any statement type. */
3619 print_statement_list (lang_statement_union_type
*s
,
3620 lang_output_section_statement_type
*os
)
3624 print_statement (s
, os
);
3629 /* Print the first statement in statement list S.
3630 This can be called for any statement type. */
3633 print_statement (lang_statement_union_type
*s
,
3634 lang_output_section_statement_type
*os
)
3636 switch (s
->header
.type
)
3639 fprintf (config
.map_file
, _("Fail with %d\n"), s
->header
.type
);
3642 case lang_constructors_statement_enum
:
3643 if (constructor_list
.head
!= NULL
)
3645 if (constructors_sorted
)
3646 minfo (" SORT (CONSTRUCTORS)\n");
3648 minfo (" CONSTRUCTORS\n");
3649 print_statement_list (constructor_list
.head
, os
);
3652 case lang_wild_statement_enum
:
3653 print_wild_statement (&s
->wild_statement
, os
);
3655 case lang_address_statement_enum
:
3656 print_address_statement (&s
->address_statement
);
3658 case lang_object_symbols_statement_enum
:
3659 minfo (" CREATE_OBJECT_SYMBOLS\n");
3661 case lang_fill_statement_enum
:
3662 print_fill_statement (&s
->fill_statement
);
3664 case lang_data_statement_enum
:
3665 print_data_statement (&s
->data_statement
);
3667 case lang_reloc_statement_enum
:
3668 print_reloc_statement (&s
->reloc_statement
);
3670 case lang_input_section_enum
:
3671 print_input_section (&s
->input_section
);
3673 case lang_padding_statement_enum
:
3674 print_padding_statement (&s
->padding_statement
);
3676 case lang_output_section_statement_enum
:
3677 print_output_section_statement (&s
->output_section_statement
);
3679 case lang_assignment_statement_enum
:
3680 print_assignment (&s
->assignment_statement
, os
);
3682 case lang_target_statement_enum
:
3683 fprintf (config
.map_file
, "TARGET(%s)\n", s
->target_statement
.target
);
3685 case lang_output_statement_enum
:
3686 minfo ("OUTPUT(%s", s
->output_statement
.name
);
3687 if (output_target
!= NULL
)
3688 minfo (" %s", output_target
);
3691 case lang_input_statement_enum
:
3692 print_input_statement (&s
->input_statement
);
3694 case lang_group_statement_enum
:
3695 print_group (&s
->group_statement
, os
);
3697 case lang_afile_asection_pair_statement_enum
:
3704 print_statements (void)
3706 print_statement_list (statement_list
.head
, abs_output_section
);
3709 /* Print the first N statements in statement list S to STDERR.
3710 If N == 0, nothing is printed.
3711 If N < 0, the entire list is printed.
3712 Intended to be called from GDB. */
3715 dprint_statement (lang_statement_union_type
*s
, int n
)
3717 FILE *map_save
= config
.map_file
;
3719 config
.map_file
= stderr
;
3722 print_statement_list (s
, abs_output_section
);
3725 while (s
&& --n
>= 0)
3727 print_statement (s
, abs_output_section
);
3732 config
.map_file
= map_save
;
3736 insert_pad (lang_statement_union_type
**ptr
,
3738 unsigned int alignment_needed
,
3739 asection
*output_section
,
3742 static fill_type zero_fill
= { 1, { 0 } };
3743 lang_statement_union_type
*pad
= NULL
;
3745 if (ptr
!= &statement_list
.head
)
3746 pad
= ((lang_statement_union_type
*)
3747 ((char *) ptr
- offsetof (lang_statement_union_type
, header
.next
)));
3749 && pad
->header
.type
== lang_padding_statement_enum
3750 && pad
->padding_statement
.output_section
== output_section
)
3752 /* Use the existing pad statement. */
3754 else if ((pad
= *ptr
) != NULL
3755 && pad
->header
.type
== lang_padding_statement_enum
3756 && pad
->padding_statement
.output_section
== output_section
)
3758 /* Use the existing pad statement. */
3762 /* Make a new padding statement, linked into existing chain. */
3763 pad
= stat_alloc (sizeof (lang_padding_statement_type
));
3764 pad
->header
.next
= *ptr
;
3766 pad
->header
.type
= lang_padding_statement_enum
;
3767 pad
->padding_statement
.output_section
= output_section
;
3770 pad
->padding_statement
.fill
= fill
;
3772 pad
->padding_statement
.output_offset
= dot
- output_section
->vma
;
3773 pad
->padding_statement
.size
= alignment_needed
;
3774 output_section
->size
+= alignment_needed
;
3777 /* Work out how much this section will move the dot point. */
3781 (lang_statement_union_type
**this_ptr
,
3782 lang_output_section_statement_type
*output_section_statement
,
3786 lang_input_section_type
*is
= &((*this_ptr
)->input_section
);
3787 asection
*i
= is
->section
;
3789 if (!is
->ifile
->just_syms_flag
&& (i
->flags
& SEC_EXCLUDE
) == 0)
3791 unsigned int alignment_needed
;
3794 /* Align this section first to the input sections requirement,
3795 then to the output section's requirement. If this alignment
3796 is greater than any seen before, then record it too. Perform
3797 the alignment by inserting a magic 'padding' statement. */
3799 if (output_section_statement
->subsection_alignment
!= -1)
3800 i
->alignment_power
= output_section_statement
->subsection_alignment
;
3802 o
= output_section_statement
->bfd_section
;
3803 if (o
->alignment_power
< i
->alignment_power
)
3804 o
->alignment_power
= i
->alignment_power
;
3806 alignment_needed
= align_power (dot
, i
->alignment_power
) - dot
;
3808 if (alignment_needed
!= 0)
3810 insert_pad (this_ptr
, fill
, TO_SIZE (alignment_needed
), o
, dot
);
3811 dot
+= alignment_needed
;
3814 /* Remember where in the output section this input section goes. */
3816 i
->output_offset
= dot
- o
->vma
;
3818 /* Mark how big the output section must be to contain this now. */
3819 dot
+= TO_ADDR (i
->size
);
3820 o
->size
= TO_SIZE (dot
- o
->vma
);
3824 i
->output_offset
= i
->vma
- output_section_statement
->bfd_section
->vma
;
3831 sort_sections_by_lma (const void *arg1
, const void *arg2
)
3833 const asection
*sec1
= *(const asection
**) arg1
;
3834 const asection
*sec2
= *(const asection
**) arg2
;
3836 if (bfd_section_lma (sec1
->owner
, sec1
)
3837 < bfd_section_lma (sec2
->owner
, sec2
))
3839 else if (bfd_section_lma (sec1
->owner
, sec1
)
3840 > bfd_section_lma (sec2
->owner
, sec2
))
3846 #define IGNORE_SECTION(s) \
3847 ((s->flags & SEC_NEVER_LOAD) != 0 \
3848 || (s->flags & SEC_ALLOC) == 0 \
3849 || ((s->flags & SEC_THREAD_LOCAL) != 0 \
3850 && (s->flags & SEC_LOAD) == 0))
3852 /* Check to see if any allocated sections overlap with other allocated
3853 sections. This can happen if a linker script specifies the output
3854 section addresses of the two sections. */
3857 lang_check_section_addresses (void)
3860 asection
**sections
, **spp
;
3868 if (bfd_count_sections (output_bfd
) <= 1)
3871 amt
= bfd_count_sections (output_bfd
) * sizeof (asection
*);
3872 sections
= xmalloc (amt
);
3874 /* Scan all sections in the output list. */
3876 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
3878 /* Only consider loadable sections with real contents. */
3879 if (IGNORE_SECTION (s
) || s
->size
== 0)
3882 sections
[count
] = s
;
3889 qsort (sections
, (size_t) count
, sizeof (asection
*),
3890 sort_sections_by_lma
);
3894 s_start
= bfd_section_lma (output_bfd
, s
);
3895 s_end
= s_start
+ TO_ADDR (s
->size
) - 1;
3896 for (count
--; count
; count
--)
3898 /* We must check the sections' LMA addresses not their VMA
3899 addresses because overlay sections can have overlapping VMAs
3900 but they must have distinct LMAs. */
3905 s_start
= bfd_section_lma (output_bfd
, s
);
3906 s_end
= s_start
+ TO_ADDR (s
->size
) - 1;
3908 /* Look for an overlap. */
3909 if (s_end
>= os_start
&& s_start
<= os_end
)
3910 einfo (_("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
3911 s
->name
, s_start
, s_end
, os
->name
, os_start
, os_end
);
3917 /* Make sure the new address is within the region. We explicitly permit the
3918 current address to be at the exact end of the region when the address is
3919 non-zero, in case the region is at the end of addressable memory and the
3920 calculation wraps around. */
3923 os_region_check (lang_output_section_statement_type
*os
,
3924 lang_memory_region_type
*region
,
3928 if ((region
->current
< region
->origin
3929 || (region
->current
- region
->origin
> region
->length
))
3930 && ((region
->current
!= region
->origin
+ region
->length
)
3935 einfo (_("%X%P: address 0x%v of %B section %s"
3936 " is not within region %s\n"),
3938 os
->bfd_section
->owner
,
3939 os
->bfd_section
->name
,
3944 einfo (_("%X%P: region %s is full (%B section %s)\n"),
3946 os
->bfd_section
->owner
,
3947 os
->bfd_section
->name
);
3949 /* Reset the region pointer. */
3950 region
->current
= region
->origin
;
3954 /* Set the sizes for all the output sections. */
3957 lang_size_sections_1
3958 (lang_statement_union_type
*s
,
3959 lang_output_section_statement_type
*output_section_statement
,
3960 lang_statement_union_type
**prev
,
3964 bfd_boolean check_regions
)
3966 /* Size up the sections from their constituent parts. */
3967 for (; s
!= NULL
; s
= s
->header
.next
)
3969 switch (s
->header
.type
)
3971 case lang_output_section_statement_enum
:
3973 bfd_vma newdot
, after
;
3974 lang_output_section_statement_type
*os
;
3976 os
= &s
->output_section_statement
;
3977 if (os
->bfd_section
== NULL
)
3978 /* This section was removed or never actually created. */
3981 /* If this is a COFF shared library section, use the size and
3982 address from the input section. FIXME: This is COFF
3983 specific; it would be cleaner if there were some other way
3984 to do this, but nothing simple comes to mind. */
3985 if ((bfd_get_flavour (output_bfd
) == bfd_target_ecoff_flavour
3986 || bfd_get_flavour (output_bfd
) == bfd_target_coff_flavour
)
3987 && (os
->bfd_section
->flags
& SEC_COFF_SHARED_LIBRARY
) != 0)
3991 if (os
->children
.head
== NULL
3992 || os
->children
.head
->header
.next
!= NULL
3993 || (os
->children
.head
->header
.type
3994 != lang_input_section_enum
))
3995 einfo (_("%P%X: Internal error on COFF shared library"
3996 " section %s\n"), os
->name
);
3998 input
= os
->children
.head
->input_section
.section
;
3999 bfd_set_section_vma (os
->bfd_section
->owner
,
4001 bfd_section_vma (input
->owner
, input
));
4002 os
->bfd_section
->size
= input
->size
;
4006 if (bfd_is_abs_section (os
->bfd_section
))
4008 /* No matter what happens, an abs section starts at zero. */
4009 ASSERT (os
->bfd_section
->vma
== 0);
4013 if (os
->addr_tree
== NULL
)
4015 /* No address specified for this section, get one
4016 from the region specification. */
4017 if (os
->region
== NULL
4018 || ((os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))
4019 && os
->region
->name
[0] == '*'
4020 && strcmp (os
->region
->name
,
4021 DEFAULT_MEMORY_REGION
) == 0))
4023 os
->region
= lang_memory_default (os
->bfd_section
);
4026 /* If a loadable section is using the default memory
4027 region, and some non default memory regions were
4028 defined, issue an error message. */
4029 if (!IGNORE_SECTION (os
->bfd_section
)
4030 && ! link_info
.relocatable
4032 && strcmp (os
->region
->name
,
4033 DEFAULT_MEMORY_REGION
) == 0
4034 && lang_memory_region_list
!= NULL
4035 && (strcmp (lang_memory_region_list
->name
,
4036 DEFAULT_MEMORY_REGION
) != 0
4037 || lang_memory_region_list
->next
!= NULL
)
4038 && expld
.phase
!= lang_mark_phase_enum
)
4040 /* By default this is an error rather than just a
4041 warning because if we allocate the section to the
4042 default memory region we can end up creating an
4043 excessively large binary, or even seg faulting when
4044 attempting to perform a negative seek. See
4045 sources.redhat.com/ml/binutils/2003-04/msg00423.html
4046 for an example of this. This behaviour can be
4047 overridden by the using the --no-check-sections
4049 if (command_line
.check_section_addresses
)
4050 einfo (_("%P%F: error: no memory region specified"
4051 " for loadable section `%s'\n"),
4052 bfd_get_section_name (output_bfd
,
4055 einfo (_("%P: warning: no memory region specified"
4056 " for loadable section `%s'\n"),
4057 bfd_get_section_name (output_bfd
,
4061 newdot
= os
->region
->current
;
4063 if (os
->section_alignment
== -1)
4065 bfd_vma savedot
= newdot
;
4066 newdot
= align_power (newdot
,
4067 os
->bfd_section
->alignment_power
);
4069 if (newdot
!= savedot
4070 && config
.warn_section_align
4071 && expld
.phase
!= lang_mark_phase_enum
)
4072 einfo (_("%P: warning: changing start of section"
4073 " %s by %lu bytes\n"),
4074 os
->name
, (unsigned long) (newdot
- savedot
));
4081 exp_fold_tree (os
->addr_tree
, bfd_abs_section_ptr
,
4085 if (!expld
.result
.valid_p
4086 && expld
.phase
!= lang_mark_phase_enum
)
4087 einfo (_("%F%S: non constant or forward reference"
4088 " address expression for section %s\n"),
4091 newdot
= expld
.result
.value
+ expld
.result
.section
->vma
;
4094 /* The section starts here.
4095 First, align to what the section needs. */
4097 if (os
->section_alignment
!= -1)
4098 newdot
= align_power (newdot
, os
->section_alignment
);
4100 bfd_set_section_vma (0, os
->bfd_section
, newdot
);
4102 os
->bfd_section
->output_offset
= 0;
4105 lang_size_sections_1 (os
->children
.head
, os
, &os
->children
.head
,
4106 os
->fill
, newdot
, relax
, check_regions
);
4110 if (bfd_is_abs_section (os
->bfd_section
) || os
->ignored
)
4112 ASSERT (os
->bfd_section
->size
== 0);
4116 dot
= os
->bfd_section
->vma
;
4118 /* Put the section within the requested block size, or
4119 align at the block boundary. */
4121 + TO_ADDR (os
->bfd_section
->size
)
4122 + os
->block_value
- 1)
4123 & - (bfd_vma
) os
->block_value
);
4125 os
->bfd_section
->size
= TO_SIZE (after
- os
->bfd_section
->vma
);
4127 /* .tbss sections effectively have zero size. */
4128 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
4129 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
4130 || link_info
.relocatable
)
4131 dot
+= TO_ADDR (os
->bfd_section
->size
);
4133 if (os
->update_dot_tree
!= 0)
4134 exp_fold_tree (os
->update_dot_tree
, bfd_abs_section_ptr
, &dot
);
4136 /* Update dot in the region ?
4137 We only do this if the section is going to be allocated,
4138 since unallocated sections do not contribute to the region's
4139 overall size in memory.
4141 If the SEC_NEVER_LOAD bit is not set, it will affect the
4142 addresses of sections after it. We have to update
4144 if (os
->region
!= NULL
4145 && ((os
->bfd_section
->flags
& SEC_NEVER_LOAD
) == 0
4146 || (os
->bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
))))
4148 os
->region
->current
= dot
;
4151 /* Make sure the new address is within the region. */
4152 os_region_check (os
, os
->region
, os
->addr_tree
,
4153 os
->bfd_section
->vma
);
4155 /* If there's no load address specified, use the run
4156 region as the load region. */
4157 if (os
->lma_region
== NULL
&& os
->load_base
== NULL
)
4158 os
->lma_region
= os
->region
;
4160 if (os
->lma_region
!= NULL
&& os
->lma_region
!= os
->region
)
4162 /* Set load_base, which will be handled later. */
4163 os
->load_base
= exp_intop (os
->lma_region
->current
);
4164 os
->lma_region
->current
+=
4165 TO_ADDR (os
->bfd_section
->size
);
4167 os_region_check (os
, os
->lma_region
, NULL
,
4168 os
->bfd_section
->lma
);
4174 case lang_constructors_statement_enum
:
4175 dot
= lang_size_sections_1 (constructor_list
.head
,
4176 output_section_statement
,
4177 &s
->wild_statement
.children
.head
,
4178 fill
, dot
, relax
, check_regions
);
4181 case lang_data_statement_enum
:
4183 unsigned int size
= 0;
4185 s
->data_statement
.output_vma
=
4186 dot
- output_section_statement
->bfd_section
->vma
;
4187 s
->data_statement
.output_section
=
4188 output_section_statement
->bfd_section
;
4190 /* We might refer to provided symbols in the expression, and
4191 need to mark them as needed. */
4192 exp_fold_tree (s
->data_statement
.exp
, bfd_abs_section_ptr
, &dot
);
4194 switch (s
->data_statement
.type
)
4212 if (size
< TO_SIZE ((unsigned) 1))
4213 size
= TO_SIZE ((unsigned) 1);
4214 dot
+= TO_ADDR (size
);
4215 output_section_statement
->bfd_section
->size
+= size
;
4219 case lang_reloc_statement_enum
:
4223 s
->reloc_statement
.output_vma
=
4224 dot
- output_section_statement
->bfd_section
->vma
;
4225 s
->reloc_statement
.output_section
=
4226 output_section_statement
->bfd_section
;
4227 size
= bfd_get_reloc_size (s
->reloc_statement
.howto
);
4228 dot
+= TO_ADDR (size
);
4229 output_section_statement
->bfd_section
->size
+= size
;
4233 case lang_wild_statement_enum
:
4234 dot
= lang_size_sections_1 (s
->wild_statement
.children
.head
,
4235 output_section_statement
,
4236 &s
->wild_statement
.children
.head
,
4237 fill
, dot
, relax
, check_regions
);
4240 case lang_object_symbols_statement_enum
:
4241 link_info
.create_object_symbols_section
=
4242 output_section_statement
->bfd_section
;
4245 case lang_output_statement_enum
:
4246 case lang_target_statement_enum
:
4249 case lang_input_section_enum
:
4253 i
= (*prev
)->input_section
.section
;
4258 if (! bfd_relax_section (i
->owner
, i
, &link_info
, &again
))
4259 einfo (_("%P%F: can't relax section: %E\n"));
4263 dot
= size_input_section (prev
, output_section_statement
,
4264 output_section_statement
->fill
, dot
);
4268 case lang_input_statement_enum
:
4271 case lang_fill_statement_enum
:
4272 s
->fill_statement
.output_section
=
4273 output_section_statement
->bfd_section
;
4275 fill
= s
->fill_statement
.fill
;
4278 case lang_assignment_statement_enum
:
4280 bfd_vma newdot
= dot
;
4282 exp_fold_tree (s
->assignment_statement
.exp
,
4283 output_section_statement
->bfd_section
,
4286 if (newdot
!= dot
&& !output_section_statement
->ignored
)
4288 if (output_section_statement
== abs_output_section
)
4290 /* If we don't have an output section, then just adjust
4291 the default memory address. */
4292 lang_memory_region_lookup (DEFAULT_MEMORY_REGION
,
4293 FALSE
)->current
= newdot
;
4297 /* Insert a pad after this statement. We can't
4298 put the pad before when relaxing, in case the
4299 assignment references dot. */
4300 insert_pad (&s
->header
.next
, fill
, TO_SIZE (newdot
- dot
),
4301 output_section_statement
->bfd_section
, dot
);
4303 /* Don't neuter the pad below when relaxing. */
4306 /* If dot is advanced, this implies that the section
4307 should have space allocated to it, unless the
4308 user has explicitly stated that the section
4309 should never be loaded. */
4310 if (!(output_section_statement
->flags
4311 & (SEC_NEVER_LOAD
| SEC_ALLOC
)))
4312 output_section_statement
->bfd_section
->flags
|= SEC_ALLOC
;
4319 case lang_padding_statement_enum
:
4320 /* If this is the first time lang_size_sections is called,
4321 we won't have any padding statements. If this is the
4322 second or later passes when relaxing, we should allow
4323 padding to shrink. If padding is needed on this pass, it
4324 will be added back in. */
4325 s
->padding_statement
.size
= 0;
4327 /* Make sure output_offset is valid. If relaxation shrinks
4328 the section and this pad isn't needed, it's possible to
4329 have output_offset larger than the final size of the
4330 section. bfd_set_section_contents will complain even for
4331 a pad size of zero. */
4332 s
->padding_statement
.output_offset
4333 = dot
- output_section_statement
->bfd_section
->vma
;
4336 case lang_group_statement_enum
:
4337 dot
= lang_size_sections_1 (s
->group_statement
.children
.head
,
4338 output_section_statement
,
4339 &s
->group_statement
.children
.head
,
4340 fill
, dot
, relax
, check_regions
);
4347 /* We can only get here when relaxing is turned on. */
4348 case lang_address_statement_enum
:
4351 prev
= &s
->header
.next
;
4357 one_lang_size_sections_pass (bfd_boolean
*relax
, bfd_boolean check_regions
)
4359 lang_statement_iteration
++;
4360 lang_size_sections_1 (statement_list
.head
, abs_output_section
,
4361 &statement_list
.head
, 0, 0, relax
, check_regions
);
4365 lang_size_sections (bfd_boolean
*relax
, bfd_boolean check_regions
)
4367 expld
.phase
= lang_allocating_phase_enum
;
4368 expld
.dataseg
.phase
= exp_dataseg_none
;
4370 one_lang_size_sections_pass (relax
, check_regions
);
4371 if (expld
.dataseg
.phase
== exp_dataseg_end_seen
4372 && link_info
.relro
&& expld
.dataseg
.relro_end
)
4374 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END pair was seen, try
4375 to put expld.dataseg.relro on a (common) page boundary. */
4376 bfd_vma old_min_base
, relro_end
, maxpage
;
4378 expld
.dataseg
.phase
= exp_dataseg_relro_adjust
;
4379 old_min_base
= expld
.dataseg
.min_base
;
4380 maxpage
= expld
.dataseg
.maxpagesize
;
4381 expld
.dataseg
.base
+= (-expld
.dataseg
.relro_end
4382 & (expld
.dataseg
.pagesize
- 1));
4383 /* Compute the expected PT_GNU_RELRO segment end. */
4384 relro_end
= (expld
.dataseg
.relro_end
+ expld
.dataseg
.pagesize
- 1)
4385 & ~(expld
.dataseg
.pagesize
- 1);
4386 if (old_min_base
+ maxpage
< expld
.dataseg
.base
)
4388 expld
.dataseg
.base
-= maxpage
;
4389 relro_end
-= maxpage
;
4391 one_lang_size_sections_pass (relax
, check_regions
);
4392 if (expld
.dataseg
.relro_end
> relro_end
)
4394 /* The alignment of sections between DATA_SEGMENT_ALIGN
4395 and DATA_SEGMENT_RELRO_END caused huge padding to be
4396 inserted at DATA_SEGMENT_RELRO_END. Try some other base. */
4398 unsigned int max_alignment_power
= 0;
4400 /* Find maximum alignment power of sections between
4401 DATA_SEGMENT_ALIGN and DATA_SEGMENT_RELRO_END. */
4402 for (sec
= output_bfd
->sections
; sec
; sec
= sec
->next
)
4403 if (sec
->vma
>= expld
.dataseg
.base
4404 && sec
->vma
< expld
.dataseg
.relro_end
4405 && sec
->alignment_power
> max_alignment_power
)
4406 max_alignment_power
= sec
->alignment_power
;
4408 if (((bfd_vma
) 1 << max_alignment_power
) < expld
.dataseg
.pagesize
)
4410 if (expld
.dataseg
.base
- (1 << max_alignment_power
)
4412 expld
.dataseg
.base
+= expld
.dataseg
.pagesize
;
4413 expld
.dataseg
.base
-= (1 << max_alignment_power
);
4414 one_lang_size_sections_pass (relax
, check_regions
);
4417 link_info
.relro_start
= expld
.dataseg
.base
;
4418 link_info
.relro_end
= expld
.dataseg
.relro_end
;
4420 else if (expld
.dataseg
.phase
== exp_dataseg_end_seen
)
4422 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether
4423 a page could be saved in the data segment. */
4424 bfd_vma first
, last
;
4426 first
= -expld
.dataseg
.base
& (expld
.dataseg
.pagesize
- 1);
4427 last
= expld
.dataseg
.end
& (expld
.dataseg
.pagesize
- 1);
4429 && ((expld
.dataseg
.base
& ~(expld
.dataseg
.pagesize
- 1))
4430 != (expld
.dataseg
.end
& ~(expld
.dataseg
.pagesize
- 1)))
4431 && first
+ last
<= expld
.dataseg
.pagesize
)
4433 expld
.dataseg
.phase
= exp_dataseg_adjust
;
4434 one_lang_size_sections_pass (relax
, check_regions
);
4438 expld
.phase
= lang_final_phase_enum
;
4441 /* Worker function for lang_do_assignments. Recursiveness goes here. */
4444 lang_do_assignments_1
4445 (lang_statement_union_type
*s
,
4446 lang_output_section_statement_type
*output_section_statement
,
4450 for (; s
!= NULL
; s
= s
->header
.next
)
4452 switch (s
->header
.type
)
4454 case lang_constructors_statement_enum
:
4455 dot
= lang_do_assignments_1 (constructor_list
.head
,
4456 output_section_statement
,
4461 case lang_output_section_statement_enum
:
4463 lang_output_section_statement_type
*os
;
4465 os
= &(s
->output_section_statement
);
4466 if (os
->bfd_section
!= NULL
&& !os
->ignored
)
4468 dot
= os
->bfd_section
->vma
;
4469 lang_do_assignments_1 (os
->children
.head
, os
, os
->fill
, dot
);
4470 /* .tbss sections effectively have zero size. */
4471 if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) != 0
4472 || (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
) == 0
4473 || link_info
.relocatable
)
4474 dot
+= TO_ADDR (os
->bfd_section
->size
);
4478 /* If nothing has been placed into the output section then
4479 it won't have a bfd_section. */
4480 if (os
->bfd_section
&& !os
->ignored
)
4482 os
->bfd_section
->lma
4483 = exp_get_abs_int (os
->load_base
, 0, "load base");
4489 case lang_wild_statement_enum
:
4491 dot
= lang_do_assignments_1 (s
->wild_statement
.children
.head
,
4492 output_section_statement
,
4496 case lang_object_symbols_statement_enum
:
4497 case lang_output_statement_enum
:
4498 case lang_target_statement_enum
:
4501 case lang_data_statement_enum
:
4502 exp_fold_tree (s
->data_statement
.exp
, bfd_abs_section_ptr
, &dot
);
4503 if (expld
.result
.valid_p
)
4504 s
->data_statement
.value
= (expld
.result
.value
4505 + expld
.result
.section
->vma
);
4507 einfo (_("%F%P: invalid data statement\n"));
4510 switch (s
->data_statement
.type
)
4528 if (size
< TO_SIZE ((unsigned) 1))
4529 size
= TO_SIZE ((unsigned) 1);
4530 dot
+= TO_ADDR (size
);
4534 case lang_reloc_statement_enum
:
4535 exp_fold_tree (s
->reloc_statement
.addend_exp
,
4536 bfd_abs_section_ptr
, &dot
);
4537 if (expld
.result
.valid_p
)
4538 s
->reloc_statement
.addend_value
= expld
.result
.value
;
4540 einfo (_("%F%P: invalid reloc statement\n"));
4541 dot
+= TO_ADDR (bfd_get_reloc_size (s
->reloc_statement
.howto
));
4544 case lang_input_section_enum
:
4546 asection
*in
= s
->input_section
.section
;
4548 if ((in
->flags
& SEC_EXCLUDE
) == 0)
4549 dot
+= TO_ADDR (in
->size
);
4553 case lang_input_statement_enum
:
4556 case lang_fill_statement_enum
:
4557 fill
= s
->fill_statement
.fill
;
4560 case lang_assignment_statement_enum
:
4561 exp_fold_tree (s
->assignment_statement
.exp
,
4562 output_section_statement
->bfd_section
,
4566 case lang_padding_statement_enum
:
4567 dot
+= TO_ADDR (s
->padding_statement
.size
);
4570 case lang_group_statement_enum
:
4571 dot
= lang_do_assignments_1 (s
->group_statement
.children
.head
,
4572 output_section_statement
,
4580 case lang_address_statement_enum
:
4588 lang_do_assignments (void)
4590 lang_statement_iteration
++;
4591 lang_do_assignments_1 (statement_list
.head
, abs_output_section
, NULL
, 0);
4594 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
4595 operator .startof. (section_name), it produces an undefined symbol
4596 .startof.section_name. Similarly, when it sees
4597 .sizeof. (section_name), it produces an undefined symbol
4598 .sizeof.section_name. For all the output sections, we look for
4599 such symbols, and set them to the correct value. */
4602 lang_set_startof (void)
4606 if (link_info
.relocatable
)
4609 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
4611 const char *secname
;
4613 struct bfd_link_hash_entry
*h
;
4615 secname
= bfd_get_section_name (output_bfd
, s
);
4616 buf
= xmalloc (10 + strlen (secname
));
4618 sprintf (buf
, ".startof.%s", secname
);
4619 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
4620 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
4622 h
->type
= bfd_link_hash_defined
;
4623 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, s
);
4624 h
->u
.def
.section
= bfd_abs_section_ptr
;
4627 sprintf (buf
, ".sizeof.%s", secname
);
4628 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
4629 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
4631 h
->type
= bfd_link_hash_defined
;
4632 h
->u
.def
.value
= TO_ADDR (s
->size
);
4633 h
->u
.def
.section
= bfd_abs_section_ptr
;
4643 struct bfd_link_hash_entry
*h
;
4646 if (link_info
.relocatable
|| link_info
.shared
)
4651 if (entry_symbol
.name
== NULL
)
4653 /* No entry has been specified. Look for the default entry, but
4654 don't warn if we don't find it. */
4655 entry_symbol
.name
= entry_symbol_default
;
4659 h
= bfd_link_hash_lookup (link_info
.hash
, entry_symbol
.name
,
4660 FALSE
, FALSE
, TRUE
);
4662 && (h
->type
== bfd_link_hash_defined
4663 || h
->type
== bfd_link_hash_defweak
)
4664 && h
->u
.def
.section
->output_section
!= NULL
)
4668 val
= (h
->u
.def
.value
4669 + bfd_get_section_vma (output_bfd
,
4670 h
->u
.def
.section
->output_section
)
4671 + h
->u
.def
.section
->output_offset
);
4672 if (! bfd_set_start_address (output_bfd
, val
))
4673 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol
.name
);
4680 /* We couldn't find the entry symbol. Try parsing it as a
4682 val
= bfd_scan_vma (entry_symbol
.name
, &send
, 0);
4685 if (! bfd_set_start_address (output_bfd
, val
))
4686 einfo (_("%P%F: can't set start address\n"));
4692 /* Can't find the entry symbol, and it's not a number. Use
4693 the first address in the text section. */
4694 ts
= bfd_get_section_by_name (output_bfd
, entry_section
);
4698 einfo (_("%P: warning: cannot find entry symbol %s;"
4699 " defaulting to %V\n"),
4701 bfd_get_section_vma (output_bfd
, ts
));
4702 if (! bfd_set_start_address (output_bfd
,
4703 bfd_get_section_vma (output_bfd
,
4705 einfo (_("%P%F: can't set start address\n"));
4710 einfo (_("%P: warning: cannot find entry symbol %s;"
4711 " not setting start address\n"),
4717 /* Don't bfd_hash_table_free (&lang_definedness_table);
4718 map file output may result in a call of lang_track_definedness. */
4721 /* This is a small function used when we want to ignore errors from
4725 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED
, ...)
4727 /* Don't do anything. */
4730 /* Check that the architecture of all the input files is compatible
4731 with the output file. Also call the backend to let it do any
4732 other checking that is needed. */
4737 lang_statement_union_type
*file
;
4739 const bfd_arch_info_type
*compatible
;
4741 for (file
= file_chain
.head
; file
!= NULL
; file
= file
->input_statement
.next
)
4743 input_bfd
= file
->input_statement
.the_bfd
;
4745 = bfd_arch_get_compatible (input_bfd
, output_bfd
,
4746 command_line
.accept_unknown_input_arch
);
4748 /* In general it is not possible to perform a relocatable
4749 link between differing object formats when the input
4750 file has relocations, because the relocations in the
4751 input format may not have equivalent representations in
4752 the output format (and besides BFD does not translate
4753 relocs for other link purposes than a final link). */
4754 if ((link_info
.relocatable
|| link_info
.emitrelocations
)
4755 && (compatible
== NULL
4756 || bfd_get_flavour (input_bfd
) != bfd_get_flavour (output_bfd
))
4757 && (bfd_get_file_flags (input_bfd
) & HAS_RELOC
) != 0)
4759 einfo (_("%P%F: Relocatable linking with relocations from"
4760 " format %s (%B) to format %s (%B) is not supported\n"),
4761 bfd_get_target (input_bfd
), input_bfd
,
4762 bfd_get_target (output_bfd
), output_bfd
);
4763 /* einfo with %F exits. */
4766 if (compatible
== NULL
)
4768 if (command_line
.warn_mismatch
)
4769 einfo (_("%P: warning: %s architecture of input file `%B'"
4770 " is incompatible with %s output\n"),
4771 bfd_printable_name (input_bfd
), input_bfd
,
4772 bfd_printable_name (output_bfd
));
4774 else if (bfd_count_sections (input_bfd
))
4776 /* If the input bfd has no contents, it shouldn't set the
4777 private data of the output bfd. */
4779 bfd_error_handler_type pfn
= NULL
;
4781 /* If we aren't supposed to warn about mismatched input
4782 files, temporarily set the BFD error handler to a
4783 function which will do nothing. We still want to call
4784 bfd_merge_private_bfd_data, since it may set up
4785 information which is needed in the output file. */
4786 if (! command_line
.warn_mismatch
)
4787 pfn
= bfd_set_error_handler (ignore_bfd_errors
);
4788 if (! bfd_merge_private_bfd_data (input_bfd
, output_bfd
))
4790 if (command_line
.warn_mismatch
)
4791 einfo (_("%P%X: failed to merge target specific data"
4792 " of file %B\n"), input_bfd
);
4794 if (! command_line
.warn_mismatch
)
4795 bfd_set_error_handler (pfn
);
4800 /* Look through all the global common symbols and attach them to the
4801 correct section. The -sort-common command line switch may be used
4802 to roughly sort the entries by size. */
4807 if (command_line
.inhibit_common_definition
)
4809 if (link_info
.relocatable
4810 && ! command_line
.force_common_definition
)
4813 if (! config
.sort_common
)
4814 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, NULL
);
4819 for (power
= 4; power
>= 0; power
--)
4820 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, &power
);
4824 /* Place one common symbol in the correct section. */
4827 lang_one_common (struct bfd_link_hash_entry
*h
, void *info
)
4829 unsigned int power_of_two
;
4833 if (h
->type
!= bfd_link_hash_common
)
4837 power_of_two
= h
->u
.c
.p
->alignment_power
;
4839 if (config
.sort_common
4840 && power_of_two
< (unsigned int) *(int *) info
)
4843 section
= h
->u
.c
.p
->section
;
4845 /* Increase the size of the section to align the common sym. */
4846 section
->size
+= ((bfd_vma
) 1 << (power_of_two
+ opb_shift
)) - 1;
4847 section
->size
&= (- (bfd_vma
) 1 << (power_of_two
+ opb_shift
));
4849 /* Adjust the alignment if necessary. */
4850 if (power_of_two
> section
->alignment_power
)
4851 section
->alignment_power
= power_of_two
;
4853 /* Change the symbol from common to defined. */
4854 h
->type
= bfd_link_hash_defined
;
4855 h
->u
.def
.section
= section
;
4856 h
->u
.def
.value
= section
->size
;
4858 /* Increase the size of the section. */
4859 section
->size
+= size
;
4861 /* Make sure the section is allocated in memory, and make sure that
4862 it is no longer a common section. */
4863 section
->flags
|= SEC_ALLOC
;
4864 section
->flags
&= ~SEC_IS_COMMON
;
4866 if (config
.map_file
!= NULL
)
4868 static bfd_boolean header_printed
;
4873 if (! header_printed
)
4875 minfo (_("\nAllocating common symbols\n"));
4876 minfo (_("Common symbol size file\n\n"));
4877 header_printed
= TRUE
;
4880 name
= demangle (h
->root
.string
);
4882 len
= strlen (name
);
4897 if (size
<= 0xffffffff)
4898 sprintf (buf
, "%lx", (unsigned long) size
);
4900 sprintf_vma (buf
, size
);
4910 minfo ("%B\n", section
->owner
);
4916 /* Run through the input files and ensure that every input section has
4917 somewhere to go. If one is found without a destination then create
4918 an input request and place it into the statement tree. */
4921 lang_place_orphans (void)
4923 LANG_FOR_EACH_INPUT_STATEMENT (file
)
4927 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
4929 if (s
->output_section
== NULL
)
4931 /* This section of the file is not attached, root
4932 around for a sensible place for it to go. */
4934 if (file
->just_syms_flag
)
4935 bfd_link_just_syms (file
->the_bfd
, s
, &link_info
);
4936 else if ((s
->flags
& SEC_EXCLUDE
) != 0)
4937 s
->output_section
= bfd_abs_section_ptr
;
4938 else if (strcmp (s
->name
, "COMMON") == 0)
4940 /* This is a lonely common section which must have
4941 come from an archive. We attach to the section
4942 with the wildcard. */
4943 if (! link_info
.relocatable
4944 || command_line
.force_common_definition
)
4946 if (default_common_section
== NULL
)
4948 default_common_section
=
4949 lang_output_section_statement_lookup (".bss");
4952 lang_add_section (&default_common_section
->children
, s
,
4953 default_common_section
, file
);
4956 else if (ldemul_place_orphan (file
, s
))
4960 lang_output_section_statement_type
*os
;
4962 os
= lang_output_section_statement_lookup (s
->name
);
4963 lang_add_section (&os
->children
, s
, os
, file
);
4971 lang_set_flags (lang_memory_region_type
*ptr
, const char *flags
, int invert
)
4973 flagword
*ptr_flags
;
4975 ptr_flags
= invert
? &ptr
->not_flags
: &ptr
->flags
;
4981 *ptr_flags
|= SEC_ALLOC
;
4985 *ptr_flags
|= SEC_READONLY
;
4989 *ptr_flags
|= SEC_DATA
;
4993 *ptr_flags
|= SEC_CODE
;
4998 *ptr_flags
|= SEC_LOAD
;
5002 einfo (_("%P%F: invalid syntax in flags\n"));
5009 /* Call a function on each input file. This function will be called
5010 on an archive, but not on the elements. */
5013 lang_for_each_input_file (void (*func
) (lang_input_statement_type
*))
5015 lang_input_statement_type
*f
;
5017 for (f
= (lang_input_statement_type
*) input_file_chain
.head
;
5019 f
= (lang_input_statement_type
*) f
->next_real_file
)
5023 /* Call a function on each file. The function will be called on all
5024 the elements of an archive which are included in the link, but will
5025 not be called on the archive file itself. */
5028 lang_for_each_file (void (*func
) (lang_input_statement_type
*))
5030 LANG_FOR_EACH_INPUT_STATEMENT (f
)
5037 ldlang_add_file (lang_input_statement_type
*entry
)
5041 lang_statement_append (&file_chain
,
5042 (lang_statement_union_type
*) entry
,
5045 /* The BFD linker needs to have a list of all input BFDs involved in
5047 ASSERT (entry
->the_bfd
->link_next
== NULL
);
5048 ASSERT (entry
->the_bfd
!= output_bfd
);
5049 for (pp
= &link_info
.input_bfds
; *pp
!= NULL
; pp
= &(*pp
)->link_next
)
5051 *pp
= entry
->the_bfd
;
5052 entry
->the_bfd
->usrdata
= entry
;
5053 bfd_set_gp_size (entry
->the_bfd
, g_switch_value
);
5055 /* Look through the sections and check for any which should not be
5056 included in the link. We need to do this now, so that we can
5057 notice when the backend linker tries to report multiple
5058 definition errors for symbols which are in sections we aren't
5059 going to link. FIXME: It might be better to entirely ignore
5060 symbols which are defined in sections which are going to be
5061 discarded. This would require modifying the backend linker for
5062 each backend which might set the SEC_LINK_ONCE flag. If we do
5063 this, we should probably handle SEC_EXCLUDE in the same way. */
5065 bfd_map_over_sections (entry
->the_bfd
, section_already_linked
, entry
);
5069 lang_add_output (const char *name
, int from_script
)
5071 /* Make -o on command line override OUTPUT in script. */
5072 if (!had_output_filename
|| !from_script
)
5074 output_filename
= name
;
5075 had_output_filename
= TRUE
;
5079 static lang_output_section_statement_type
*current_section
;
5090 for (l
= 0; l
< 32; l
++)
5092 if (i
>= (unsigned int) x
)
5100 lang_output_section_statement_type
*
5101 lang_enter_output_section_statement (const char *output_section_statement_name
,
5102 etree_type
*address_exp
,
5103 enum section_type sectype
,
5105 etree_type
*subalign
,
5109 lang_output_section_statement_type
*os
;
5113 lang_output_section_statement_lookup_1 (output_section_statement_name
,
5116 /* Make next things chain into subchain of this. */
5118 if (os
->addr_tree
== NULL
)
5120 os
->addr_tree
= address_exp
;
5122 os
->sectype
= sectype
;
5123 if (sectype
!= noload_section
)
5124 os
->flags
= SEC_NO_FLAGS
;
5126 os
->flags
= SEC_NEVER_LOAD
;
5127 os
->block_value
= 1;
5128 stat_ptr
= &os
->children
;
5130 os
->subsection_alignment
=
5131 topower (exp_get_value_int (subalign
, -1, "subsection alignment"));
5132 os
->section_alignment
=
5133 topower (exp_get_value_int (align
, -1, "section alignment"));
5135 os
->load_base
= ebase
;
5142 lang_output_statement_type
*new =
5143 new_stat (lang_output_statement
, stat_ptr
);
5145 new->name
= output_filename
;
5148 /* Reset the current counters in the regions. */
5151 lang_reset_memory_regions (void)
5153 lang_memory_region_type
*p
= lang_memory_region_list
;
5155 lang_output_section_statement_type
*os
;
5157 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
5159 p
->old_length
= (bfd_size_type
) (p
->current
- p
->origin
);
5160 p
->current
= p
->origin
;
5163 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5168 for (o
= output_bfd
->sections
; o
!= NULL
; o
= o
->next
)
5170 /* Save the last size for possible use by bfd_relax_section. */
5171 o
->rawsize
= o
->size
;
5176 /* Worker for lang_gc_sections_1. */
5179 gc_section_callback (lang_wild_statement_type
*ptr
,
5180 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
5182 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
5183 void *data ATTRIBUTE_UNUSED
)
5185 /* If the wild pattern was marked KEEP, the member sections
5186 should be as well. */
5187 if (ptr
->keep_sections
)
5188 section
->flags
|= SEC_KEEP
;
5191 /* Iterate over sections marking them against GC. */
5194 lang_gc_sections_1 (lang_statement_union_type
*s
)
5196 for (; s
!= NULL
; s
= s
->header
.next
)
5198 switch (s
->header
.type
)
5200 case lang_wild_statement_enum
:
5201 walk_wild (&s
->wild_statement
, gc_section_callback
, NULL
);
5203 case lang_constructors_statement_enum
:
5204 lang_gc_sections_1 (constructor_list
.head
);
5206 case lang_output_section_statement_enum
:
5207 lang_gc_sections_1 (s
->output_section_statement
.children
.head
);
5209 case lang_group_statement_enum
:
5210 lang_gc_sections_1 (s
->group_statement
.children
.head
);
5219 lang_gc_sections (void)
5221 struct bfd_link_hash_entry
*h
;
5222 ldlang_undef_chain_list_type
*ulist
;
5224 /* Keep all sections so marked in the link script. */
5226 lang_gc_sections_1 (statement_list
.head
);
5228 /* Keep all sections containing symbols undefined on the command-line,
5229 and the section containing the entry symbol. */
5231 for (ulist
= link_info
.gc_sym_list
; ulist
; ulist
= ulist
->next
)
5233 h
= bfd_link_hash_lookup (link_info
.hash
, ulist
->name
,
5234 FALSE
, FALSE
, FALSE
);
5237 && (h
->type
== bfd_link_hash_defined
5238 || h
->type
== bfd_link_hash_defweak
)
5239 && ! bfd_is_abs_section (h
->u
.def
.section
))
5241 h
->u
.def
.section
->flags
|= SEC_KEEP
;
5245 /* SEC_EXCLUDE is ignored when doing a relocatable link, except in
5246 the special case of debug info. (See bfd/stabs.c)
5247 Twiddle the flag here, to simplify later linker code. */
5248 if (link_info
.relocatable
)
5250 LANG_FOR_EACH_INPUT_STATEMENT (f
)
5253 for (sec
= f
->the_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5254 if ((sec
->flags
& SEC_DEBUGGING
) == 0)
5255 sec
->flags
&= ~SEC_EXCLUDE
;
5259 if (link_info
.gc_sections
)
5260 bfd_gc_sections (output_bfd
, &link_info
);
5266 current_target
= default_target
;
5268 /* Open the output file. */
5269 lang_for_each_statement (ldlang_open_output
);
5272 ldemul_create_output_section_statements ();
5274 /* Add to the hash table all undefineds on the command line. */
5275 lang_place_undefineds ();
5277 if (!bfd_section_already_linked_table_init ())
5278 einfo (_("%P%F: Failed to create hash table\n"));
5280 /* Create a bfd for each input file. */
5281 current_target
= default_target
;
5282 open_input_bfds (statement_list
.head
, FALSE
);
5284 link_info
.gc_sym_list
= &entry_symbol
;
5285 if (entry_symbol
.name
== NULL
)
5286 link_info
.gc_sym_list
= ldlang_undef_chain_list_head
;
5288 ldemul_after_open ();
5290 bfd_section_already_linked_table_free ();
5292 /* Make sure that we're not mixing architectures. We call this
5293 after all the input files have been opened, but before we do any
5294 other processing, so that any operations merge_private_bfd_data
5295 does on the output file will be known during the rest of the
5299 /* Handle .exports instead of a version script if we're told to do so. */
5300 if (command_line
.version_exports_section
)
5301 lang_do_version_exports_section ();
5303 /* Build all sets based on the information gathered from the input
5305 ldctor_build_sets ();
5307 /* Remove unreferenced sections if asked to. */
5308 lang_gc_sections ();
5310 /* Size up the common data. */
5313 /* Update wild statements. */
5314 update_wild_statements (statement_list
.head
);
5316 /* Run through the contours of the script and attach input sections
5317 to the correct output sections. */
5318 map_input_to_output_sections (statement_list
.head
, NULL
, NULL
);
5320 /* Find any sections not attached explicitly and handle them. */
5321 lang_place_orphans ();
5323 if (! link_info
.relocatable
)
5327 /* Merge SEC_MERGE sections. This has to be done after GC of
5328 sections, so that GCed sections are not merged, but before
5329 assigning dynamic symbols, since removing whole input sections
5331 bfd_merge_sections (output_bfd
, &link_info
);
5333 /* Look for a text section and set the readonly attribute in it. */
5334 found
= bfd_get_section_by_name (output_bfd
, ".text");
5338 if (config
.text_read_only
)
5339 found
->flags
|= SEC_READONLY
;
5341 found
->flags
&= ~SEC_READONLY
;
5345 /* Do anything special before sizing sections. This is where ELF
5346 and other back-ends size dynamic sections. */
5347 ldemul_before_allocation ();
5349 /* We must record the program headers before we try to fix the
5350 section positions, since they will affect SIZEOF_HEADERS. */
5351 lang_record_phdrs ();
5353 /* Size up the sections. */
5354 lang_size_sections (NULL
, !command_line
.relax
);
5356 /* Now run around and relax if we can. */
5357 if (command_line
.relax
)
5359 /* Keep relaxing until bfd_relax_section gives up. */
5360 bfd_boolean relax_again
;
5364 relax_again
= FALSE
;
5366 /* Note: pe-dll.c does something like this also. If you find
5367 you need to change this code, you probably need to change
5368 pe-dll.c also. DJ */
5370 /* Do all the assignments with our current guesses as to
5372 lang_do_assignments ();
5374 /* We must do this after lang_do_assignments, because it uses
5376 lang_reset_memory_regions ();
5378 /* Perform another relax pass - this time we know where the
5379 globals are, so can make a better guess. */
5380 lang_size_sections (&relax_again
, FALSE
);
5382 /* If the normal relax is done and the relax finalize pass
5383 is not performed yet, we perform another relax pass. */
5384 if (!relax_again
&& link_info
.need_relax_finalize
)
5386 link_info
.need_relax_finalize
= FALSE
;
5390 while (relax_again
);
5392 /* Final extra sizing to report errors. */
5393 lang_do_assignments ();
5394 lang_reset_memory_regions ();
5395 lang_size_sections (NULL
, TRUE
);
5398 /* See if anything special should be done now we know how big
5400 ldemul_after_allocation ();
5402 /* Fix any .startof. or .sizeof. symbols. */
5403 lang_set_startof ();
5405 /* Do all the assignments, now that we know the final resting places
5406 of all the symbols. */
5408 lang_do_assignments ();
5410 /* Make sure that the section addresses make sense. */
5411 if (! link_info
.relocatable
5412 && command_line
.check_section_addresses
)
5413 lang_check_section_addresses ();
5420 /* EXPORTED TO YACC */
5423 lang_add_wild (struct wildcard_spec
*filespec
,
5424 struct wildcard_list
*section_list
,
5425 bfd_boolean keep_sections
)
5427 struct wildcard_list
*curr
, *next
;
5428 lang_wild_statement_type
*new;
5430 /* Reverse the list as the parser puts it back to front. */
5431 for (curr
= section_list
, section_list
= NULL
;
5433 section_list
= curr
, curr
= next
)
5435 if (curr
->spec
.name
!= NULL
&& strcmp (curr
->spec
.name
, "COMMON") == 0)
5436 placed_commons
= TRUE
;
5439 curr
->next
= section_list
;
5442 if (filespec
!= NULL
&& filespec
->name
!= NULL
)
5444 if (strcmp (filespec
->name
, "*") == 0)
5445 filespec
->name
= NULL
;
5446 else if (! wildcardp (filespec
->name
))
5447 lang_has_input_file
= TRUE
;
5450 new = new_stat (lang_wild_statement
, stat_ptr
);
5451 new->filename
= NULL
;
5452 new->filenames_sorted
= FALSE
;
5453 if (filespec
!= NULL
)
5455 new->filename
= filespec
->name
;
5456 new->filenames_sorted
= filespec
->sorted
== by_name
;
5458 new->section_list
= section_list
;
5459 new->keep_sections
= keep_sections
;
5460 lang_list_init (&new->children
);
5461 analyze_walk_wild_section_handler (new);
5465 lang_section_start (const char *name
, etree_type
*address
,
5466 const segment_type
*segment
)
5468 lang_address_statement_type
*ad
;
5470 ad
= new_stat (lang_address_statement
, stat_ptr
);
5471 ad
->section_name
= name
;
5472 ad
->address
= address
;
5473 ad
->segment
= segment
;
5476 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
5477 because of a -e argument on the command line, or zero if this is
5478 called by ENTRY in a linker script. Command line arguments take
5482 lang_add_entry (const char *name
, bfd_boolean cmdline
)
5484 if (entry_symbol
.name
== NULL
5486 || ! entry_from_cmdline
)
5488 entry_symbol
.name
= name
;
5489 entry_from_cmdline
= cmdline
;
5493 /* Set the default start symbol to NAME. .em files should use this,
5494 not lang_add_entry, to override the use of "start" if neither the
5495 linker script nor the command line specifies an entry point. NAME
5496 must be permanently allocated. */
5498 lang_default_entry (const char *name
)
5500 entry_symbol_default
= name
;
5504 lang_add_target (const char *name
)
5506 lang_target_statement_type
*new = new_stat (lang_target_statement
,
5514 lang_add_map (const char *name
)
5521 map_option_f
= TRUE
;
5529 lang_add_fill (fill_type
*fill
)
5531 lang_fill_statement_type
*new = new_stat (lang_fill_statement
,
5538 lang_add_data (int type
, union etree_union
*exp
)
5541 lang_data_statement_type
*new = new_stat (lang_data_statement
,
5549 /* Create a new reloc statement. RELOC is the BFD relocation type to
5550 generate. HOWTO is the corresponding howto structure (we could
5551 look this up, but the caller has already done so). SECTION is the
5552 section to generate a reloc against, or NAME is the name of the
5553 symbol to generate a reloc against. Exactly one of SECTION and
5554 NAME must be NULL. ADDEND is an expression for the addend. */
5557 lang_add_reloc (bfd_reloc_code_real_type reloc
,
5558 reloc_howto_type
*howto
,
5561 union etree_union
*addend
)
5563 lang_reloc_statement_type
*p
= new_stat (lang_reloc_statement
, stat_ptr
);
5567 p
->section
= section
;
5569 p
->addend_exp
= addend
;
5571 p
->addend_value
= 0;
5572 p
->output_section
= NULL
;
5576 lang_assignment_statement_type
*
5577 lang_add_assignment (etree_type
*exp
)
5579 lang_assignment_statement_type
*new = new_stat (lang_assignment_statement
,
5587 lang_add_attribute (enum statement_enum attribute
)
5589 new_statement (attribute
, sizeof (lang_statement_union_type
), stat_ptr
);
5593 lang_startup (const char *name
)
5595 if (startup_file
!= NULL
)
5597 einfo (_("%P%Fmultiple STARTUP files\n"));
5599 first_file
->filename
= name
;
5600 first_file
->local_sym_name
= name
;
5601 first_file
->real
= TRUE
;
5603 startup_file
= name
;
5607 lang_float (bfd_boolean maybe
)
5609 lang_float_flag
= maybe
;
5613 /* Work out the load- and run-time regions from a script statement, and
5614 store them in *LMA_REGION and *REGION respectively.
5616 MEMSPEC is the name of the run-time region, or the value of
5617 DEFAULT_MEMORY_REGION if the statement didn't specify one.
5618 LMA_MEMSPEC is the name of the load-time region, or null if the
5619 statement didn't specify one.HAVE_LMA_P is TRUE if the statement
5620 had an explicit load address.
5622 It is an error to specify both a load region and a load address. */
5625 lang_get_regions (lang_memory_region_type
**region
,
5626 lang_memory_region_type
**lma_region
,
5627 const char *memspec
,
5628 const char *lma_memspec
,
5629 bfd_boolean have_lma
,
5630 bfd_boolean have_vma
)
5632 *lma_region
= lang_memory_region_lookup (lma_memspec
, FALSE
);
5634 /* If no runtime region or VMA has been specified, but the load region
5635 has been specified, then use the load region for the runtime region
5637 if (lma_memspec
!= NULL
5639 && strcmp (memspec
, DEFAULT_MEMORY_REGION
) == 0)
5640 *region
= *lma_region
;
5642 *region
= lang_memory_region_lookup (memspec
, FALSE
);
5644 if (have_lma
&& lma_memspec
!= 0)
5645 einfo (_("%X%P:%S: section has both a load address and a load region\n"));
5649 lang_leave_output_section_statement (fill_type
*fill
, const char *memspec
,
5650 lang_output_section_phdr_list
*phdrs
,
5651 const char *lma_memspec
)
5653 lang_get_regions (¤t_section
->region
,
5654 ¤t_section
->lma_region
,
5655 memspec
, lma_memspec
,
5656 current_section
->load_base
!= NULL
,
5657 current_section
->addr_tree
!= NULL
);
5658 current_section
->fill
= fill
;
5659 current_section
->phdrs
= phdrs
;
5660 stat_ptr
= &statement_list
;
5663 /* Create an absolute symbol with the given name with the value of the
5664 address of first byte of the section named.
5666 If the symbol already exists, then do nothing. */
5669 lang_abs_symbol_at_beginning_of (const char *secname
, const char *name
)
5671 struct bfd_link_hash_entry
*h
;
5673 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
5675 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5677 if (h
->type
== bfd_link_hash_new
5678 || h
->type
== bfd_link_hash_undefined
)
5682 h
->type
= bfd_link_hash_defined
;
5684 sec
= bfd_get_section_by_name (output_bfd
, secname
);
5688 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, sec
);
5690 h
->u
.def
.section
= bfd_abs_section_ptr
;
5694 /* Create an absolute symbol with the given name with the value of the
5695 address of the first byte after the end of the section named.
5697 If the symbol already exists, then do nothing. */
5700 lang_abs_symbol_at_end_of (const char *secname
, const char *name
)
5702 struct bfd_link_hash_entry
*h
;
5704 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
5706 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
5708 if (h
->type
== bfd_link_hash_new
5709 || h
->type
== bfd_link_hash_undefined
)
5713 h
->type
= bfd_link_hash_defined
;
5715 sec
= bfd_get_section_by_name (output_bfd
, secname
);
5719 h
->u
.def
.value
= (bfd_get_section_vma (output_bfd
, sec
)
5720 + TO_ADDR (sec
->size
));
5722 h
->u
.def
.section
= bfd_abs_section_ptr
;
5727 lang_statement_append (lang_statement_list_type
*list
,
5728 lang_statement_union_type
*element
,
5729 lang_statement_union_type
**field
)
5731 *(list
->tail
) = element
;
5735 /* Set the output format type. -oformat overrides scripts. */
5738 lang_add_output_format (const char *format
,
5743 if (output_target
== NULL
|| !from_script
)
5745 if (command_line
.endian
== ENDIAN_BIG
5748 else if (command_line
.endian
== ENDIAN_LITTLE
5752 output_target
= format
;
5756 /* Enter a group. This creates a new lang_group_statement, and sets
5757 stat_ptr to build new statements within the group. */
5760 lang_enter_group (void)
5762 lang_group_statement_type
*g
;
5764 g
= new_stat (lang_group_statement
, stat_ptr
);
5765 lang_list_init (&g
->children
);
5766 stat_ptr
= &g
->children
;
5769 /* Leave a group. This just resets stat_ptr to start writing to the
5770 regular list of statements again. Note that this will not work if
5771 groups can occur inside anything else which can adjust stat_ptr,
5772 but currently they can't. */
5775 lang_leave_group (void)
5777 stat_ptr
= &statement_list
;
5780 /* Add a new program header. This is called for each entry in a PHDRS
5781 command in a linker script. */
5784 lang_new_phdr (const char *name
,
5786 bfd_boolean filehdr
,
5791 struct lang_phdr
*n
, **pp
;
5793 n
= stat_alloc (sizeof (struct lang_phdr
));
5796 n
->type
= exp_get_value_int (type
, 0, "program header type");
5797 n
->filehdr
= filehdr
;
5802 for (pp
= &lang_phdr_list
; *pp
!= NULL
; pp
= &(*pp
)->next
)
5807 /* Record the program header information in the output BFD. FIXME: We
5808 should not be calling an ELF specific function here. */
5811 lang_record_phdrs (void)
5815 lang_output_section_phdr_list
*last
;
5816 struct lang_phdr
*l
;
5817 lang_output_section_statement_type
*os
;
5820 secs
= xmalloc (alc
* sizeof (asection
*));
5822 for (l
= lang_phdr_list
; l
!= NULL
; l
= l
->next
)
5829 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5833 lang_output_section_phdr_list
*pl
;
5835 if (os
->constraint
== -1)
5843 if (os
->sectype
== noload_section
5844 || os
->bfd_section
== NULL
5845 || (os
->bfd_section
->flags
& SEC_ALLOC
) == 0)
5850 if (os
->bfd_section
== NULL
)
5853 for (; pl
!= NULL
; pl
= pl
->next
)
5855 if (strcmp (pl
->name
, l
->name
) == 0)
5860 secs
= xrealloc (secs
, alc
* sizeof (asection
*));
5862 secs
[c
] = os
->bfd_section
;
5869 if (l
->flags
== NULL
)
5872 flags
= exp_get_vma (l
->flags
, 0, "phdr flags");
5877 at
= exp_get_vma (l
->at
, 0, "phdr load address");
5879 if (! bfd_record_phdr (output_bfd
, l
->type
,
5880 l
->flags
!= NULL
, flags
, l
->at
!= NULL
,
5881 at
, l
->filehdr
, l
->phdrs
, c
, secs
))
5882 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
5887 /* Make sure all the phdr assignments succeeded. */
5888 for (os
= &lang_output_section_statement
.head
->output_section_statement
;
5892 lang_output_section_phdr_list
*pl
;
5894 if (os
->constraint
== -1
5895 || os
->bfd_section
== NULL
)
5898 for (pl
= os
->phdrs
;
5901 if (! pl
->used
&& strcmp (pl
->name
, "NONE") != 0)
5902 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
5903 os
->name
, pl
->name
);
5907 /* Record a list of sections which may not be cross referenced. */
5910 lang_add_nocrossref (lang_nocrossref_type
*l
)
5912 struct lang_nocrossrefs
*n
;
5914 n
= xmalloc (sizeof *n
);
5915 n
->next
= nocrossref_list
;
5917 nocrossref_list
= n
;
5919 /* Set notice_all so that we get informed about all symbols. */
5920 link_info
.notice_all
= TRUE
;
5923 /* Overlay handling. We handle overlays with some static variables. */
5925 /* The overlay virtual address. */
5926 static etree_type
*overlay_vma
;
5927 /* And subsection alignment. */
5928 static etree_type
*overlay_subalign
;
5930 /* An expression for the maximum section size seen so far. */
5931 static etree_type
*overlay_max
;
5933 /* A list of all the sections in this overlay. */
5935 struct overlay_list
{
5936 struct overlay_list
*next
;
5937 lang_output_section_statement_type
*os
;
5940 static struct overlay_list
*overlay_list
;
5942 /* Start handling an overlay. */
5945 lang_enter_overlay (etree_type
*vma_expr
, etree_type
*subalign
)
5947 /* The grammar should prevent nested overlays from occurring. */
5948 ASSERT (overlay_vma
== NULL
5949 && overlay_subalign
== NULL
5950 && overlay_max
== NULL
);
5952 overlay_vma
= vma_expr
;
5953 overlay_subalign
= subalign
;
5956 /* Start a section in an overlay. We handle this by calling
5957 lang_enter_output_section_statement with the correct VMA.
5958 lang_leave_overlay sets up the LMA and memory regions. */
5961 lang_enter_overlay_section (const char *name
)
5963 struct overlay_list
*n
;
5966 lang_enter_output_section_statement (name
, overlay_vma
, normal_section
,
5967 0, overlay_subalign
, 0, 0);
5969 /* If this is the first section, then base the VMA of future
5970 sections on this one. This will work correctly even if `.' is
5971 used in the addresses. */
5972 if (overlay_list
== NULL
)
5973 overlay_vma
= exp_nameop (ADDR
, name
);
5975 /* Remember the section. */
5976 n
= xmalloc (sizeof *n
);
5977 n
->os
= current_section
;
5978 n
->next
= overlay_list
;
5981 size
= exp_nameop (SIZEOF
, name
);
5983 /* Arrange to work out the maximum section end address. */
5984 if (overlay_max
== NULL
)
5987 overlay_max
= exp_binop (MAX_K
, overlay_max
, size
);
5990 /* Finish a section in an overlay. There isn't any special to do
5994 lang_leave_overlay_section (fill_type
*fill
,
5995 lang_output_section_phdr_list
*phdrs
)
6002 name
= current_section
->name
;
6004 /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory
6005 region and that no load-time region has been specified. It doesn't
6006 really matter what we say here, since lang_leave_overlay will
6008 lang_leave_output_section_statement (fill
, DEFAULT_MEMORY_REGION
, phdrs
, 0);
6010 /* Define the magic symbols. */
6012 clean
= xmalloc (strlen (name
) + 1);
6014 for (s1
= name
; *s1
!= '\0'; s1
++)
6015 if (ISALNUM (*s1
) || *s1
== '_')
6019 buf
= xmalloc (strlen (clean
) + sizeof "__load_start_");
6020 sprintf (buf
, "__load_start_%s", clean
);
6021 lang_add_assignment (exp_assop ('=', buf
,
6022 exp_nameop (LOADADDR
, name
)));
6024 buf
= xmalloc (strlen (clean
) + sizeof "__load_stop_");
6025 sprintf (buf
, "__load_stop_%s", clean
);
6026 lang_add_assignment (exp_assop ('=', buf
,
6028 exp_nameop (LOADADDR
, name
),
6029 exp_nameop (SIZEOF
, name
))));
6034 /* Finish an overlay. If there are any overlay wide settings, this
6035 looks through all the sections in the overlay and sets them. */
6038 lang_leave_overlay (etree_type
*lma_expr
,
6041 const char *memspec
,
6042 lang_output_section_phdr_list
*phdrs
,
6043 const char *lma_memspec
)
6045 lang_memory_region_type
*region
;
6046 lang_memory_region_type
*lma_region
;
6047 struct overlay_list
*l
;
6048 lang_nocrossref_type
*nocrossref
;
6050 lang_get_regions (®ion
, &lma_region
,
6051 memspec
, lma_memspec
,
6052 lma_expr
!= NULL
, FALSE
);
6056 /* After setting the size of the last section, set '.' to end of the
6058 if (overlay_list
!= NULL
)
6059 overlay_list
->os
->update_dot_tree
6060 = exp_assop ('=', ".", exp_binop ('+', overlay_vma
, overlay_max
));
6065 struct overlay_list
*next
;
6067 if (fill
!= NULL
&& l
->os
->fill
== NULL
)
6070 l
->os
->region
= region
;
6071 l
->os
->lma_region
= lma_region
;
6073 /* The first section has the load address specified in the
6074 OVERLAY statement. The rest are worked out from that.
6075 The base address is not needed (and should be null) if
6076 an LMA region was specified. */
6078 l
->os
->load_base
= lma_expr
;
6079 else if (lma_region
== 0)
6080 l
->os
->load_base
= exp_binop ('+',
6081 exp_nameop (LOADADDR
, l
->next
->os
->name
),
6082 exp_nameop (SIZEOF
, l
->next
->os
->name
));
6084 if (phdrs
!= NULL
&& l
->os
->phdrs
== NULL
)
6085 l
->os
->phdrs
= phdrs
;
6089 lang_nocrossref_type
*nc
;
6091 nc
= xmalloc (sizeof *nc
);
6092 nc
->name
= l
->os
->name
;
6093 nc
->next
= nocrossref
;
6102 if (nocrossref
!= NULL
)
6103 lang_add_nocrossref (nocrossref
);
6106 overlay_list
= NULL
;
6110 /* Version handling. This is only useful for ELF. */
6112 /* This global variable holds the version tree that we build. */
6114 struct bfd_elf_version_tree
*lang_elf_version_info
;
6116 /* If PREV is NULL, return first version pattern matching particular symbol.
6117 If PREV is non-NULL, return first version pattern matching particular
6118 symbol after PREV (previously returned by lang_vers_match). */
6120 static struct bfd_elf_version_expr
*
6121 lang_vers_match (struct bfd_elf_version_expr_head
*head
,
6122 struct bfd_elf_version_expr
*prev
,
6125 const char *cxx_sym
= sym
;
6126 const char *java_sym
= sym
;
6127 struct bfd_elf_version_expr
*expr
= NULL
;
6129 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
6131 cxx_sym
= cplus_demangle (sym
, DMGL_PARAMS
| DMGL_ANSI
);
6135 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
6137 java_sym
= cplus_demangle (sym
, DMGL_JAVA
);
6142 if (head
->htab
&& (prev
== NULL
|| prev
->symbol
))
6144 struct bfd_elf_version_expr e
;
6146 switch (prev
? prev
->mask
: 0)
6149 if (head
->mask
& BFD_ELF_VERSION_C_TYPE
)
6152 expr
= htab_find (head
->htab
, &e
);
6153 while (expr
&& strcmp (expr
->symbol
, sym
) == 0)
6154 if (expr
->mask
== BFD_ELF_VERSION_C_TYPE
)
6160 case BFD_ELF_VERSION_C_TYPE
:
6161 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
6164 expr
= htab_find (head
->htab
, &e
);
6165 while (expr
&& strcmp (expr
->symbol
, cxx_sym
) == 0)
6166 if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
6172 case BFD_ELF_VERSION_CXX_TYPE
:
6173 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
6175 e
.symbol
= java_sym
;
6176 expr
= htab_find (head
->htab
, &e
);
6177 while (expr
&& strcmp (expr
->symbol
, java_sym
) == 0)
6178 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
6189 /* Finally, try the wildcards. */
6190 if (prev
== NULL
|| prev
->symbol
)
6191 expr
= head
->remaining
;
6198 if (expr
->pattern
[0] == '*' && expr
->pattern
[1] == '\0')
6201 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
6203 else if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
6207 if (fnmatch (expr
->pattern
, s
, 0) == 0)
6214 free ((char *) cxx_sym
);
6215 if (java_sym
!= sym
)
6216 free ((char *) java_sym
);
6220 /* Return NULL if the PATTERN argument is a glob pattern, otherwise,
6221 return a string pointing to the symbol name. */
6224 realsymbol (const char *pattern
)
6227 bfd_boolean changed
= FALSE
, backslash
= FALSE
;
6228 char *s
, *symbol
= xmalloc (strlen (pattern
) + 1);
6230 for (p
= pattern
, s
= symbol
; *p
!= '\0'; ++p
)
6232 /* It is a glob pattern only if there is no preceding
6234 if (! backslash
&& (*p
== '?' || *p
== '*' || *p
== '['))
6242 /* Remove the preceding backslash. */
6249 backslash
= *p
== '\\';
6264 /* This is called for each variable name or match expression. */
6266 struct bfd_elf_version_expr
*
6267 lang_new_vers_pattern (struct bfd_elf_version_expr
*orig
,
6271 struct bfd_elf_version_expr
*ret
;
6273 ret
= xmalloc (sizeof *ret
);
6278 ret
->symbol
= realsymbol (new);
6280 if (lang
== NULL
|| strcasecmp (lang
, "C") == 0)
6281 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
6282 else if (strcasecmp (lang
, "C++") == 0)
6283 ret
->mask
= BFD_ELF_VERSION_CXX_TYPE
;
6284 else if (strcasecmp (lang
, "Java") == 0)
6285 ret
->mask
= BFD_ELF_VERSION_JAVA_TYPE
;
6288 einfo (_("%X%P: unknown language `%s' in version information\n"),
6290 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
6293 return ldemul_new_vers_pattern (ret
);
6296 /* This is called for each set of variable names and match
6299 struct bfd_elf_version_tree
*
6300 lang_new_vers_node (struct bfd_elf_version_expr
*globals
,
6301 struct bfd_elf_version_expr
*locals
)
6303 struct bfd_elf_version_tree
*ret
;
6305 ret
= xcalloc (1, sizeof *ret
);
6306 ret
->globals
.list
= globals
;
6307 ret
->locals
.list
= locals
;
6308 ret
->match
= lang_vers_match
;
6309 ret
->name_indx
= (unsigned int) -1;
6313 /* This static variable keeps track of version indices. */
6315 static int version_index
;
6318 version_expr_head_hash (const void *p
)
6320 const struct bfd_elf_version_expr
*e
= p
;
6322 return htab_hash_string (e
->symbol
);
6326 version_expr_head_eq (const void *p1
, const void *p2
)
6328 const struct bfd_elf_version_expr
*e1
= p1
;
6329 const struct bfd_elf_version_expr
*e2
= p2
;
6331 return strcmp (e1
->symbol
, e2
->symbol
) == 0;
6335 lang_finalize_version_expr_head (struct bfd_elf_version_expr_head
*head
)
6338 struct bfd_elf_version_expr
*e
, *next
;
6339 struct bfd_elf_version_expr
**list_loc
, **remaining_loc
;
6341 for (e
= head
->list
; e
; e
= e
->next
)
6345 head
->mask
|= e
->mask
;
6350 head
->htab
= htab_create (count
* 2, version_expr_head_hash
,
6351 version_expr_head_eq
, NULL
);
6352 list_loc
= &head
->list
;
6353 remaining_loc
= &head
->remaining
;
6354 for (e
= head
->list
; e
; e
= next
)
6360 remaining_loc
= &e
->next
;
6364 void **loc
= htab_find_slot (head
->htab
, e
, INSERT
);
6368 struct bfd_elf_version_expr
*e1
, *last
;
6374 if (e1
->mask
== e
->mask
)
6382 while (e1
&& strcmp (e1
->symbol
, e
->symbol
) == 0);
6386 /* This is a duplicate. */
6387 /* FIXME: Memory leak. Sometimes pattern is not
6388 xmalloced alone, but in larger chunk of memory. */
6389 /* free (e->symbol); */
6394 e
->next
= last
->next
;
6402 list_loc
= &e
->next
;
6406 *remaining_loc
= NULL
;
6407 *list_loc
= head
->remaining
;
6410 head
->remaining
= head
->list
;
6413 /* This is called when we know the name and dependencies of the
6417 lang_register_vers_node (const char *name
,
6418 struct bfd_elf_version_tree
*version
,
6419 struct bfd_elf_version_deps
*deps
)
6421 struct bfd_elf_version_tree
*t
, **pp
;
6422 struct bfd_elf_version_expr
*e1
;
6427 if ((name
[0] == '\0' && lang_elf_version_info
!= NULL
)
6428 || (lang_elf_version_info
&& lang_elf_version_info
->name
[0] == '\0'))
6430 einfo (_("%X%P: anonymous version tag cannot be combined"
6431 " with other version tags\n"));
6436 /* Make sure this node has a unique name. */
6437 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6438 if (strcmp (t
->name
, name
) == 0)
6439 einfo (_("%X%P: duplicate version tag `%s'\n"), name
);
6441 lang_finalize_version_expr_head (&version
->globals
);
6442 lang_finalize_version_expr_head (&version
->locals
);
6444 /* Check the global and local match names, and make sure there
6445 aren't any duplicates. */
6447 for (e1
= version
->globals
.list
; e1
!= NULL
; e1
= e1
->next
)
6449 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6451 struct bfd_elf_version_expr
*e2
;
6453 if (t
->locals
.htab
&& e1
->symbol
)
6455 e2
= htab_find (t
->locals
.htab
, e1
);
6456 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
6458 if (e1
->mask
== e2
->mask
)
6459 einfo (_("%X%P: duplicate expression `%s'"
6460 " in version information\n"), e1
->symbol
);
6464 else if (!e1
->symbol
)
6465 for (e2
= t
->locals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
6466 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
6467 && e1
->mask
== e2
->mask
)
6468 einfo (_("%X%P: duplicate expression `%s'"
6469 " in version information\n"), e1
->pattern
);
6473 for (e1
= version
->locals
.list
; e1
!= NULL
; e1
= e1
->next
)
6475 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6477 struct bfd_elf_version_expr
*e2
;
6479 if (t
->globals
.htab
&& e1
->symbol
)
6481 e2
= htab_find (t
->globals
.htab
, e1
);
6482 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
6484 if (e1
->mask
== e2
->mask
)
6485 einfo (_("%X%P: duplicate expression `%s'"
6486 " in version information\n"),
6491 else if (!e1
->symbol
)
6492 for (e2
= t
->globals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
6493 if (strcmp (e1
->pattern
, e2
->pattern
) == 0
6494 && e1
->mask
== e2
->mask
)
6495 einfo (_("%X%P: duplicate expression `%s'"
6496 " in version information\n"), e1
->pattern
);
6500 version
->deps
= deps
;
6501 version
->name
= name
;
6502 if (name
[0] != '\0')
6505 version
->vernum
= version_index
;
6508 version
->vernum
= 0;
6510 for (pp
= &lang_elf_version_info
; *pp
!= NULL
; pp
= &(*pp
)->next
)
6515 /* This is called when we see a version dependency. */
6517 struct bfd_elf_version_deps
*
6518 lang_add_vers_depend (struct bfd_elf_version_deps
*list
, const char *name
)
6520 struct bfd_elf_version_deps
*ret
;
6521 struct bfd_elf_version_tree
*t
;
6523 ret
= xmalloc (sizeof *ret
);
6526 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
6528 if (strcmp (t
->name
, name
) == 0)
6530 ret
->version_needed
= t
;
6535 einfo (_("%X%P: unable to find version dependency `%s'\n"), name
);
6541 lang_do_version_exports_section (void)
6543 struct bfd_elf_version_expr
*greg
= NULL
, *lreg
;
6545 LANG_FOR_EACH_INPUT_STATEMENT (is
)
6547 asection
*sec
= bfd_get_section_by_name (is
->the_bfd
, ".exports");
6555 contents
= xmalloc (len
);
6556 if (!bfd_get_section_contents (is
->the_bfd
, sec
, contents
, 0, len
))
6557 einfo (_("%X%P: unable to read .exports section contents\n"), sec
);
6560 while (p
< contents
+ len
)
6562 greg
= lang_new_vers_pattern (greg
, p
, NULL
);
6563 p
= strchr (p
, '\0') + 1;
6566 /* Do not free the contents, as we used them creating the regex. */
6568 /* Do not include this section in the link. */
6569 sec
->flags
|= SEC_EXCLUDE
;
6572 lreg
= lang_new_vers_pattern (NULL
, "*", NULL
);
6573 lang_register_vers_node (command_line
.version_exports_section
,
6574 lang_new_vers_node (greg
, lreg
), NULL
);
6578 lang_add_unique (const char *name
)
6580 struct unique_sections
*ent
;
6582 for (ent
= unique_section_list
; ent
; ent
= ent
->next
)
6583 if (strcmp (ent
->name
, name
) == 0)
6586 ent
= xmalloc (sizeof *ent
);
6587 ent
->name
= xstrdup (name
);
6588 ent
->next
= unique_section_list
;
6589 unique_section_list
= ent
;