1 /* Linker command language support.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 Free Software Foundation, Inc.
6 This file is part of GLD, the Gnu Linker.
8 GLD is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GLD is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GLD; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 #include "libiberty.h"
26 #include "safe-ctype.h"
45 #define offsetof(TYPE, MEMBER) ((size_t) & (((TYPE*) 0)->MEMBER))
48 /* Locals variables. */
49 static struct obstack stat_obstack
;
51 #define obstack_chunk_alloc xmalloc
52 #define obstack_chunk_free free
53 static const char *startup_file
;
54 static lang_statement_list_type input_file_chain
;
55 static bfd_boolean placed_commons
= FALSE
;
56 static lang_output_section_statement_type
*default_common_section
;
57 static bfd_boolean map_option_f
;
58 static bfd_vma print_dot
;
59 static lang_input_statement_type
*first_file
;
60 static const char *current_target
;
61 static const char *output_target
;
62 static lang_statement_list_type statement_list
;
63 static struct lang_phdr
*lang_phdr_list
;
64 static struct bfd_hash_table lang_definedness_table
;
66 /* Forward declarations. */
67 static void exp_init_os (etree_type
*);
68 static bfd_boolean
wildcardp (const char *);
69 static lang_input_statement_type
*lookup_name (const char *);
70 static bfd_boolean
load_symbols (lang_input_statement_type
*,
71 lang_statement_list_type
*);
72 static struct bfd_hash_entry
*lang_definedness_newfunc
73 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
74 static void insert_undefined (const char *);
75 static void print_statement (lang_statement_union_type
*,
76 lang_output_section_statement_type
*);
77 static void print_statement_list (lang_statement_union_type
*,
78 lang_output_section_statement_type
*);
79 static void print_statements (void);
80 static bfd_boolean
lang_one_common (struct bfd_link_hash_entry
*, void *);
81 static void lang_record_phdrs (void);
82 static void lang_do_version_exports_section (void);
84 typedef void (*callback_t
) (lang_wild_statement_type
*, struct wildcard_list
*,
85 asection
*, lang_input_statement_type
*, void *);
87 /* Exported variables. */
88 lang_output_section_statement_type
*abs_output_section
;
89 lang_statement_list_type lang_output_section_statement
;
90 lang_statement_list_type
*stat_ptr
= &statement_list
;
91 lang_statement_list_type file_chain
= { NULL
, NULL
};
92 struct bfd_sym_chain entry_symbol
= { NULL
, NULL
};
93 const char *entry_section
= ".text";
94 bfd_boolean entry_from_cmdline
;
95 bfd_boolean lang_has_input_file
= FALSE
;
96 bfd_boolean had_output_filename
= FALSE
;
97 bfd_boolean lang_float_flag
= FALSE
;
98 bfd_boolean delete_output_file_on_failure
= FALSE
;
99 struct lang_nocrossrefs
*nocrossref_list
;
100 struct unique_sections
*unique_section_list
;
101 static bfd_boolean ldlang_sysrooted_script
= FALSE
;
102 int lang_statement_iteration
= 0;
104 etree_type
*base
; /* Relocation base - or null */
106 #define new_stat(x, y) \
107 (x##_type *) new_statement (x##_enum, sizeof (x##_type), y)
109 #define outside_section_address(q) \
110 ((q)->output_offset + (q)->output_section->vma)
112 #define outside_symbol_address(q) \
113 ((q)->value + outside_section_address (q->section))
115 #define SECTION_NAME_MAP_LENGTH (16)
118 stat_alloc (size_t size
)
120 return obstack_alloc (&stat_obstack
, size
);
124 unique_section_p (const char *secnam
)
126 struct unique_sections
*unam
;
128 for (unam
= unique_section_list
; unam
; unam
= unam
->next
)
129 if (wildcardp (unam
->name
)
130 ? fnmatch (unam
->name
, secnam
, 0) == 0
131 : strcmp (unam
->name
, secnam
) == 0)
139 /* Generic traversal routines for finding matching sections. */
142 walk_wild_section (lang_wild_statement_type
*ptr
,
143 lang_input_statement_type
*file
,
149 if (file
->just_syms_flag
)
152 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
154 struct wildcard_list
*sec
;
156 sec
= ptr
->section_list
;
158 (*callback
) (ptr
, sec
, s
, file
, data
);
162 bfd_boolean skip
= FALSE
;
163 struct name_list
*list_tmp
;
165 /* Don't process sections from files which were
167 for (list_tmp
= sec
->spec
.exclude_name_list
;
169 list_tmp
= list_tmp
->next
)
171 if (wildcardp (list_tmp
->name
))
172 skip
= fnmatch (list_tmp
->name
, file
->filename
, 0) == 0;
174 skip
= strcmp (list_tmp
->name
, file
->filename
) == 0;
176 /* If this file is part of an archive, and the archive is
177 excluded, exclude this file. */
178 if (! skip
&& file
->the_bfd
!= NULL
179 && file
->the_bfd
->my_archive
!= NULL
180 && file
->the_bfd
->my_archive
->filename
!= NULL
)
182 if (wildcardp (list_tmp
->name
))
183 skip
= fnmatch (list_tmp
->name
,
184 file
->the_bfd
->my_archive
->filename
,
187 skip
= strcmp (list_tmp
->name
,
188 file
->the_bfd
->my_archive
->filename
) == 0;
195 if (!skip
&& sec
->spec
.name
!= NULL
)
197 const char *sname
= bfd_get_section_name (file
->the_bfd
, s
);
199 if (wildcardp (sec
->spec
.name
))
200 skip
= fnmatch (sec
->spec
.name
, sname
, 0) != 0;
202 skip
= strcmp (sec
->spec
.name
, sname
) != 0;
206 (*callback
) (ptr
, sec
, s
, file
, data
);
213 /* Handle a wild statement for a single file F. */
216 walk_wild_file (lang_wild_statement_type
*s
,
217 lang_input_statement_type
*f
,
221 if (f
->the_bfd
== NULL
222 || ! bfd_check_format (f
->the_bfd
, bfd_archive
))
223 walk_wild_section (s
, f
, callback
, data
);
228 /* This is an archive file. We must map each member of the
229 archive separately. */
230 member
= bfd_openr_next_archived_file (f
->the_bfd
, NULL
);
231 while (member
!= NULL
)
233 /* When lookup_name is called, it will call the add_symbols
234 entry point for the archive. For each element of the
235 archive which is included, BFD will call ldlang_add_file,
236 which will set the usrdata field of the member to the
237 lang_input_statement. */
238 if (member
->usrdata
!= NULL
)
240 walk_wild_section (s
, member
->usrdata
, callback
, data
);
243 member
= bfd_openr_next_archived_file (f
->the_bfd
, member
);
249 walk_wild (lang_wild_statement_type
*s
, callback_t callback
, void *data
)
251 const char *file_spec
= s
->filename
;
253 if (file_spec
== NULL
)
255 /* Perform the iteration over all files in the list. */
256 LANG_FOR_EACH_INPUT_STATEMENT (f
)
258 walk_wild_file (s
, f
, callback
, data
);
261 else if (wildcardp (file_spec
))
263 LANG_FOR_EACH_INPUT_STATEMENT (f
)
265 if (fnmatch (file_spec
, f
->filename
, FNM_FILE_NAME
) == 0)
266 walk_wild_file (s
, f
, callback
, data
);
271 lang_input_statement_type
*f
;
273 /* Perform the iteration over a single file. */
274 f
= lookup_name (file_spec
);
276 walk_wild_file (s
, f
, callback
, data
);
280 /* lang_for_each_statement walks the parse tree and calls the provided
281 function for each node. */
284 lang_for_each_statement_worker (void (*func
) (lang_statement_union_type
*),
285 lang_statement_union_type
*s
)
287 for (; s
!= NULL
; s
= s
->header
.next
)
291 switch (s
->header
.type
)
293 case lang_constructors_statement_enum
:
294 lang_for_each_statement_worker (func
, constructor_list
.head
);
296 case lang_output_section_statement_enum
:
297 lang_for_each_statement_worker
299 s
->output_section_statement
.children
.head
);
301 case lang_wild_statement_enum
:
302 lang_for_each_statement_worker
304 s
->wild_statement
.children
.head
);
306 case lang_group_statement_enum
:
307 lang_for_each_statement_worker (func
,
308 s
->group_statement
.children
.head
);
310 case lang_data_statement_enum
:
311 case lang_reloc_statement_enum
:
312 case lang_object_symbols_statement_enum
:
313 case lang_output_statement_enum
:
314 case lang_target_statement_enum
:
315 case lang_input_section_enum
:
316 case lang_input_statement_enum
:
317 case lang_assignment_statement_enum
:
318 case lang_padding_statement_enum
:
319 case lang_address_statement_enum
:
320 case lang_fill_statement_enum
:
330 lang_for_each_statement (void (*func
) (lang_statement_union_type
*))
332 lang_for_each_statement_worker (func
, statement_list
.head
);
335 /*----------------------------------------------------------------------*/
338 lang_list_init (lang_statement_list_type
*list
)
341 list
->tail
= &list
->head
;
344 /* Build a new statement node for the parse tree. */
346 static lang_statement_union_type
*
347 new_statement (enum statement_enum type
,
349 lang_statement_list_type
*list
)
351 lang_statement_union_type
*new;
353 new = stat_alloc (size
);
354 new->header
.type
= type
;
355 new->header
.next
= NULL
;
356 lang_statement_append (list
, new, &new->header
.next
);
360 /* Build a new input file node for the language. There are several
361 ways in which we treat an input file, eg, we only look at symbols,
362 or prefix it with a -l etc.
364 We can be supplied with requests for input files more than once;
365 they may, for example be split over several lines like foo.o(.text)
366 foo.o(.data) etc, so when asked for a file we check that we haven't
367 got it already so we don't duplicate the bfd. */
369 static lang_input_statement_type
*
370 new_afile (const char *name
,
371 lang_input_file_enum_type file_type
,
373 bfd_boolean add_to_list
)
375 lang_input_statement_type
*p
;
378 p
= new_stat (lang_input_statement
, stat_ptr
);
381 p
= stat_alloc (sizeof (lang_input_statement_type
));
382 p
->header
.next
= NULL
;
385 lang_has_input_file
= TRUE
;
387 p
->sysrooted
= FALSE
;
390 case lang_input_file_is_symbols_only_enum
:
392 p
->is_archive
= FALSE
;
394 p
->local_sym_name
= name
;
395 p
->just_syms_flag
= TRUE
;
396 p
->search_dirs_flag
= FALSE
;
398 case lang_input_file_is_fake_enum
:
400 p
->is_archive
= FALSE
;
402 p
->local_sym_name
= name
;
403 p
->just_syms_flag
= FALSE
;
404 p
->search_dirs_flag
= FALSE
;
406 case lang_input_file_is_l_enum
:
407 p
->is_archive
= TRUE
;
410 p
->local_sym_name
= concat ("-l", name
, NULL
);
411 p
->just_syms_flag
= FALSE
;
412 p
->search_dirs_flag
= TRUE
;
414 case lang_input_file_is_marker_enum
:
416 p
->is_archive
= FALSE
;
418 p
->local_sym_name
= name
;
419 p
->just_syms_flag
= FALSE
;
420 p
->search_dirs_flag
= TRUE
;
422 case lang_input_file_is_search_file_enum
:
423 p
->sysrooted
= ldlang_sysrooted_script
;
425 p
->is_archive
= FALSE
;
427 p
->local_sym_name
= name
;
428 p
->just_syms_flag
= FALSE
;
429 p
->search_dirs_flag
= TRUE
;
431 case lang_input_file_is_file_enum
:
433 p
->is_archive
= FALSE
;
435 p
->local_sym_name
= name
;
436 p
->just_syms_flag
= FALSE
;
437 p
->search_dirs_flag
= FALSE
;
444 p
->next_real_file
= NULL
;
447 p
->dynamic
= config
.dynamic_link
;
448 p
->whole_archive
= whole_archive
;
450 lang_statement_append (&input_file_chain
,
451 (lang_statement_union_type
*) p
,
456 lang_input_statement_type
*
457 lang_add_input_file (const char *name
,
458 lang_input_file_enum_type file_type
,
461 lang_has_input_file
= TRUE
;
462 return new_afile (name
, file_type
, target
, TRUE
);
465 /* Build enough state so that the parser can build its tree. */
470 obstack_begin (&stat_obstack
, 1000);
472 stat_ptr
= &statement_list
;
474 lang_list_init (stat_ptr
);
476 lang_list_init (&input_file_chain
);
477 lang_list_init (&lang_output_section_statement
);
478 lang_list_init (&file_chain
);
479 first_file
= lang_add_input_file (NULL
, lang_input_file_is_marker_enum
,
482 lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME
);
484 abs_output_section
->bfd_section
= bfd_abs_section_ptr
;
486 /* The value "3" is ad-hoc, somewhat related to the expected number of
487 DEFINED expressions in a linker script. For most default linker
488 scripts, there are none. Why a hash table then? Well, it's somewhat
489 simpler to re-use working machinery than using a linked list in terms
490 of code-complexity here in ld, besides the initialization which just
491 looks like other code here. */
492 if (bfd_hash_table_init_n (&lang_definedness_table
,
493 lang_definedness_newfunc
, 3) != TRUE
)
494 einfo (_("%P%F: out of memory during initialization"));
496 /* Callers of exp_fold_tree need to increment this. */
497 lang_statement_iteration
= 0;
500 /*----------------------------------------------------------------------
501 A region is an area of memory declared with the
502 MEMORY { name:org=exp, len=exp ... }
505 We maintain a list of all the regions here.
507 If no regions are specified in the script, then the default is used
508 which is created when looked up to be the entire data space.
510 If create is true we are creating a region inside a MEMORY block.
511 In this case it is probably an error to create a region that has
512 already been created. If we are not inside a MEMORY block it is
513 dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION)
514 and so we issue a warning. */
516 static lang_memory_region_type
*lang_memory_region_list
;
517 static lang_memory_region_type
**lang_memory_region_list_tail
= &lang_memory_region_list
;
519 lang_memory_region_type
*
520 lang_memory_region_lookup (const char *const name
, bfd_boolean create
)
522 lang_memory_region_type
*p
;
523 lang_memory_region_type
*new;
525 /* NAME is NULL for LMA memspecs if no region was specified. */
529 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
530 if (strcmp (p
->name
, name
) == 0)
533 einfo (_("%P:%S: warning: redeclaration of memory region '%s'\n"), name
);
538 /* This code used to always use the first region in the list as the
539 default region. I changed it to instead use a region
540 encompassing all of memory as the default region. This permits
541 NOLOAD sections to work reasonably without requiring a region.
542 People should specify what region they mean, if they really want
544 if (strcmp (name
, DEFAULT_MEMORY_REGION
) == 0)
546 if (lang_memory_region_list
!= NULL
)
547 return lang_memory_region_list
;
551 if (!create
&& strcmp (name
, DEFAULT_MEMORY_REGION
))
552 einfo (_("%P:%S: warning: memory region %s not declared\n"), name
);
554 new = stat_alloc (sizeof (lang_memory_region_type
));
556 new->name
= xstrdup (name
);
559 *lang_memory_region_list_tail
= new;
560 lang_memory_region_list_tail
= &new->next
;
564 new->length
= ~(bfd_size_type
) 0;
566 new->had_full_message
= FALSE
;
571 static lang_memory_region_type
*
572 lang_memory_default (asection
*section
)
574 lang_memory_region_type
*p
;
576 flagword sec_flags
= section
->flags
;
578 /* Override SEC_DATA to mean a writable section. */
579 if ((sec_flags
& (SEC_ALLOC
| SEC_READONLY
| SEC_CODE
)) == SEC_ALLOC
)
580 sec_flags
|= SEC_DATA
;
582 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
584 if ((p
->flags
& sec_flags
) != 0
585 && (p
->not_flags
& sec_flags
) == 0)
590 return lang_memory_region_lookup (DEFAULT_MEMORY_REGION
, FALSE
);
593 lang_output_section_statement_type
*
594 lang_output_section_find (const char *const name
)
596 lang_statement_union_type
*u
;
597 lang_output_section_statement_type
*lookup
;
599 for (u
= lang_output_section_statement
.head
; u
!= NULL
; u
= lookup
->next
)
601 lookup
= &u
->output_section_statement
;
602 if (strcmp (name
, lookup
->name
) == 0)
608 lang_output_section_statement_type
*
609 lang_output_section_statement_lookup (const char *const name
)
611 lang_output_section_statement_type
*lookup
;
613 lookup
= lang_output_section_find (name
);
616 lookup
= new_stat (lang_output_section_statement
, stat_ptr
);
617 lookup
->region
= NULL
;
618 lookup
->lma_region
= NULL
;
620 lookup
->block_value
= 1;
624 lookup
->bfd_section
= NULL
;
625 lookup
->processed
= 0;
626 lookup
->sectype
= normal_section
;
627 lookup
->addr_tree
= NULL
;
628 lang_list_init (&lookup
->children
);
630 lookup
->memspec
= NULL
;
632 lookup
->subsection_alignment
= -1;
633 lookup
->section_alignment
= -1;
634 lookup
->load_base
= NULL
;
635 lookup
->update_dot_tree
= NULL
;
636 lookup
->phdrs
= NULL
;
638 lang_statement_append (&lang_output_section_statement
,
639 (lang_statement_union_type
*) lookup
,
646 lang_map_flags (flagword flag
)
648 if (flag
& SEC_ALLOC
)
654 if (flag
& SEC_READONLY
)
667 lang_memory_region_type
*m
;
669 minfo (_("\nMemory Configuration\n\n"));
670 fprintf (config
.map_file
, "%-16s %-18s %-18s %s\n",
671 _("Name"), _("Origin"), _("Length"), _("Attributes"));
673 for (m
= lang_memory_region_list
; m
!= NULL
; m
= m
->next
)
678 fprintf (config
.map_file
, "%-16s ", m
->name
);
680 sprintf_vma (buf
, m
->origin
);
681 minfo ("0x%s ", buf
);
689 minfo ("0x%V", m
->length
);
690 if (m
->flags
|| m
->not_flags
)
698 lang_map_flags (m
->flags
);
704 lang_map_flags (m
->not_flags
);
711 fprintf (config
.map_file
, _("\nLinker script and memory map\n\n"));
716 /* Initialize an output section. */
719 init_os (lang_output_section_statement_type
*s
)
721 section_userdata_type
*new;
723 if (s
->bfd_section
!= NULL
)
726 if (strcmp (s
->name
, DISCARD_SECTION_NAME
) == 0)
727 einfo (_("%P%F: Illegal use of `%s' section\n"), DISCARD_SECTION_NAME
);
729 new = stat_alloc (sizeof (section_userdata_type
));
731 s
->bfd_section
= bfd_get_section_by_name (output_bfd
, s
->name
);
732 if (s
->bfd_section
== NULL
)
733 s
->bfd_section
= bfd_make_section (output_bfd
, s
->name
);
734 if (s
->bfd_section
== NULL
)
736 einfo (_("%P%F: output format %s cannot represent section called %s\n"),
737 output_bfd
->xvec
->name
, s
->name
);
739 s
->bfd_section
->output_section
= s
->bfd_section
;
741 /* We initialize an output sections output offset to minus its own
742 vma to allow us to output a section through itself. */
743 s
->bfd_section
->output_offset
= 0;
744 get_userdata (s
->bfd_section
) = new;
746 /* If there is a base address, make sure that any sections it might
747 mention are initialized. */
748 if (s
->addr_tree
!= NULL
)
749 exp_init_os (s
->addr_tree
);
751 if (s
->load_base
!= NULL
)
752 exp_init_os (s
->load_base
);
755 /* Make sure that all output sections mentioned in an expression are
759 exp_init_os (etree_type
*exp
)
761 switch (exp
->type
.node_class
)
764 exp_init_os (exp
->assign
.src
);
768 exp_init_os (exp
->binary
.lhs
);
769 exp_init_os (exp
->binary
.rhs
);
773 exp_init_os (exp
->trinary
.cond
);
774 exp_init_os (exp
->trinary
.lhs
);
775 exp_init_os (exp
->trinary
.rhs
);
779 exp_init_os (exp
->assert_s
.child
);
783 exp_init_os (exp
->unary
.child
);
787 switch (exp
->type
.node_code
)
793 lang_output_section_statement_type
*os
;
795 os
= lang_output_section_find (exp
->name
.name
);
796 if (os
!= NULL
&& os
->bfd_section
== NULL
)
807 /* Sections marked with the SEC_LINK_ONCE flag should only be linked
808 once into the output. This routine checks each section, and
809 arrange to discard it if a section of the same name has already
810 been linked. If the section has COMDAT information, then it uses
811 that to decide whether the section should be included. This code
812 assumes that all relevant sections have the SEC_LINK_ONCE flag set;
813 that is, it does not depend solely upon the section name.
814 section_already_linked is called via bfd_map_over_sections. */
816 /* This is the shape of the elements inside the already_linked hash
817 table. It maps a name onto a list of already_linked elements with
818 the same name. It's possible to get more than one element in a
819 list if the COMDAT sections have different names. */
821 struct already_linked_hash_entry
823 struct bfd_hash_entry root
;
824 struct already_linked
*entry
;
827 struct already_linked
829 struct already_linked
*next
;
833 /* The hash table. */
835 static struct bfd_hash_table already_linked_table
;
838 section_already_linked (bfd
*abfd
, asection
*sec
, void *data
)
840 lang_input_statement_type
*entry
= data
;
843 struct already_linked
*l
;
844 struct already_linked_hash_entry
*already_linked_list
;
846 /* If we are only reading symbols from this object, then we want to
847 discard all sections. */
848 if (entry
->just_syms_flag
)
850 bfd_link_just_syms (sec
, &link_info
);
854 flags
= bfd_get_section_flags (abfd
, sec
);
856 if ((flags
& SEC_LINK_ONCE
) == 0)
859 /* FIXME: When doing a relocatable link, we may have trouble
860 copying relocations in other sections that refer to local symbols
861 in the section being discarded. Those relocations will have to
862 be converted somehow; as of this writing I'm not sure that any of
863 the backends handle that correctly.
865 It is tempting to instead not discard link once sections when
866 doing a relocatable link (technically, they should be discarded
867 whenever we are building constructors). However, that fails,
868 because the linker winds up combining all the link once sections
869 into a single large link once section, which defeats the purpose
870 of having link once sections in the first place.
872 Also, not merging link once sections in a relocatable link
873 causes trouble for MIPS ELF, which relies on link once semantics
874 to handle the .reginfo section correctly. */
876 name
= bfd_get_section_name (abfd
, sec
);
878 already_linked_list
=
879 ((struct already_linked_hash_entry
*)
880 bfd_hash_lookup (&already_linked_table
, name
, TRUE
, FALSE
));
882 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
884 if (sec
->comdat
== NULL
885 || l
->sec
->comdat
== NULL
886 || strcmp (sec
->comdat
->name
, l
->sec
->comdat
->name
) == 0)
888 /* The section has already been linked. See if we should
890 switch (flags
& SEC_LINK_DUPLICATES
)
895 case SEC_LINK_DUPLICATES_DISCARD
:
898 case SEC_LINK_DUPLICATES_ONE_ONLY
:
899 if (sec
->comdat
== NULL
)
900 einfo (_("%P: %B: warning: ignoring duplicate section `%s'\n"),
903 einfo (_("%P: %B: warning: ignoring duplicate `%s' section symbol `%s'\n"),
904 abfd
, name
, sec
->comdat
->name
);
907 case SEC_LINK_DUPLICATES_SAME_CONTENTS
:
908 /* FIXME: We should really dig out the contents of both
909 sections and memcmp them. The COFF/PE spec says that
910 the Microsoft linker does not implement this
911 correctly, so I'm not going to bother doing it
914 case SEC_LINK_DUPLICATES_SAME_SIZE
:
915 if (bfd_section_size (abfd
, sec
)
916 != bfd_section_size (l
->sec
->owner
, l
->sec
))
917 einfo (_("%P: %B: warning: duplicate section `%s' has different size\n"),
922 /* Set the output_section field so that lang_add_section
923 does not create a lang_input_section structure for this
924 section. Since there might be a symbol in the section
925 being discarded, we must retain a pointer to the section
926 which we are really going to use. */
927 sec
->output_section
= bfd_abs_section_ptr
;
928 sec
->kept_section
= l
->sec
;
930 if (flags
& SEC_GROUP
)
931 bfd_discard_group (abfd
, sec
);
937 /* This is the first section with this name. Record it. Allocate
938 the memory from the same obstack as the hash table is kept in. */
940 l
= bfd_hash_allocate (&already_linked_table
, sizeof *l
);
943 l
->next
= already_linked_list
->entry
;
944 already_linked_list
->entry
= l
;
947 /* Support routines for the hash table used by section_already_linked,
948 initialize the table, fill in an entry and remove the table. */
950 static struct bfd_hash_entry
*
951 already_linked_newfunc (struct bfd_hash_entry
*entry ATTRIBUTE_UNUSED
,
952 struct bfd_hash_table
*table
,
953 const char *string ATTRIBUTE_UNUSED
)
955 struct already_linked_hash_entry
*ret
=
956 bfd_hash_allocate (table
, sizeof (struct already_linked_hash_entry
));
964 already_linked_table_init (void)
966 if (! bfd_hash_table_init_n (&already_linked_table
,
967 already_linked_newfunc
,
969 einfo (_("%P%F: Failed to create hash table\n"));
973 already_linked_table_free (void)
975 bfd_hash_table_free (&already_linked_table
);
978 /* The wild routines.
980 These expand statements like *(.text) and foo.o to a list of
981 explicit actions, like foo.o(.text), bar.o(.text) and
982 foo.o(.text, .data). */
984 /* Return TRUE if the PATTERN argument is a wildcard pattern.
985 Although backslashes are treated specially if a pattern contains
986 wildcards, we do not consider the mere presence of a backslash to
987 be enough to cause the pattern to be treated as a wildcard.
988 That lets us handle DOS filenames more naturally. */
991 wildcardp (const char *pattern
)
995 for (s
= pattern
; *s
!= '\0'; ++s
)
1003 /* Add SECTION to the output section OUTPUT. Do this by creating a
1004 lang_input_section statement which is placed at PTR. FILE is the
1005 input file which holds SECTION. */
1008 lang_add_section (lang_statement_list_type
*ptr
,
1010 lang_output_section_statement_type
*output
,
1011 lang_input_statement_type
*file
)
1014 bfd_boolean discard
;
1016 flags
= bfd_get_section_flags (section
->owner
, section
);
1020 /* Discard sections marked with SEC_EXCLUDE if we are doing a final
1021 link. Discard debugging sections marked with SEC_EXCLUDE on a
1022 relocatable link too. */
1023 if ((flags
& SEC_EXCLUDE
) != 0
1024 && ((flags
& SEC_DEBUGGING
) != 0 || !link_info
.relocatable
))
1027 /* Discard input sections which are assigned to a section named
1028 DISCARD_SECTION_NAME. */
1029 if (strcmp (output
->name
, DISCARD_SECTION_NAME
) == 0)
1032 /* Discard debugging sections if we are stripping debugging
1034 if ((link_info
.strip
== strip_debugger
|| link_info
.strip
== strip_all
)
1035 && (flags
& SEC_DEBUGGING
) != 0)
1040 if (section
->output_section
== NULL
)
1042 /* This prevents future calls from assigning this section. */
1043 section
->output_section
= bfd_abs_section_ptr
;
1048 if (section
->output_section
== NULL
)
1051 lang_input_section_type
*new;
1054 if (output
->bfd_section
== NULL
)
1057 first
= ! output
->bfd_section
->linker_has_input
;
1058 output
->bfd_section
->linker_has_input
= 1;
1060 /* Add a section reference to the list. */
1061 new = new_stat (lang_input_section
, ptr
);
1063 new->section
= section
;
1065 section
->output_section
= output
->bfd_section
;
1067 flags
= section
->flags
;
1069 /* We don't copy the SEC_NEVER_LOAD flag from an input section
1070 to an output section, because we want to be able to include a
1071 SEC_NEVER_LOAD section in the middle of an otherwise loaded
1072 section (I don't know why we want to do this, but we do).
1073 build_link_order in ldwrite.c handles this case by turning
1074 the embedded SEC_NEVER_LOAD section into a fill. */
1076 flags
&= ~ SEC_NEVER_LOAD
;
1078 /* If final link, don't copy the SEC_LINK_ONCE flags, they've
1079 already been processed. One reason to do this is that on pe
1080 format targets, .text$foo sections go into .text and it's odd
1081 to see .text with SEC_LINK_ONCE set. */
1083 if (! link_info
.relocatable
)
1084 flags
&= ~ (SEC_LINK_ONCE
| SEC_LINK_DUPLICATES
);
1086 /* If this is not the first input section, and the SEC_READONLY
1087 flag is not currently set, then don't set it just because the
1088 input section has it set. */
1090 if (! first
&& (section
->output_section
->flags
& SEC_READONLY
) == 0)
1091 flags
&= ~ SEC_READONLY
;
1093 /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */
1095 && ((section
->output_section
->flags
& (SEC_MERGE
| SEC_STRINGS
))
1096 != (flags
& (SEC_MERGE
| SEC_STRINGS
))
1097 || ((flags
& SEC_MERGE
)
1098 && section
->output_section
->entsize
!= section
->entsize
)))
1100 section
->output_section
->flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1101 flags
&= ~ (SEC_MERGE
| SEC_STRINGS
);
1104 /* For now make .tbss normal section. */
1105 if ((flags
& SEC_THREAD_LOCAL
) && ! link_info
.relocatable
)
1108 section
->output_section
->flags
|= flags
;
1110 if (flags
& SEC_MERGE
)
1111 section
->output_section
->entsize
= section
->entsize
;
1113 /* If SEC_READONLY is not set in the input section, then clear
1114 it from the output section. */
1115 if ((section
->flags
& SEC_READONLY
) == 0)
1116 section
->output_section
->flags
&= ~SEC_READONLY
;
1118 switch (output
->sectype
)
1120 case normal_section
:
1125 case overlay_section
:
1126 output
->bfd_section
->flags
&= ~SEC_ALLOC
;
1128 case noload_section
:
1129 output
->bfd_section
->flags
&= ~SEC_LOAD
;
1130 output
->bfd_section
->flags
|= SEC_NEVER_LOAD
;
1134 /* Copy over SEC_SMALL_DATA. */
1135 if (section
->flags
& SEC_SMALL_DATA
)
1136 section
->output_section
->flags
|= SEC_SMALL_DATA
;
1138 if (section
->alignment_power
> output
->bfd_section
->alignment_power
)
1139 output
->bfd_section
->alignment_power
= section
->alignment_power
;
1141 /* If supplied an alignment, then force it. */
1142 if (output
->section_alignment
!= -1)
1143 output
->bfd_section
->alignment_power
= output
->section_alignment
;
1145 if (section
->flags
& SEC_BLOCK
)
1147 section
->output_section
->flags
|= SEC_BLOCK
;
1148 /* FIXME: This value should really be obtained from the bfd... */
1149 output
->block_value
= 128;
1154 /* Handle wildcard sorting. This returns the lang_input_section which
1155 should follow the one we are going to create for SECTION and FILE,
1156 based on the sorting requirements of WILD. It returns NULL if the
1157 new section should just go at the end of the current list. */
1159 static lang_statement_union_type
*
1160 wild_sort (lang_wild_statement_type
*wild
,
1161 struct wildcard_list
*sec
,
1162 lang_input_statement_type
*file
,
1165 const char *section_name
;
1166 lang_statement_union_type
*l
;
1168 if (!wild
->filenames_sorted
&& (sec
== NULL
|| !sec
->spec
.sorted
))
1171 section_name
= bfd_get_section_name (file
->the_bfd
, section
);
1172 for (l
= wild
->children
.head
; l
!= NULL
; l
= l
->header
.next
)
1174 lang_input_section_type
*ls
;
1176 if (l
->header
.type
!= lang_input_section_enum
)
1178 ls
= &l
->input_section
;
1180 /* Sorting by filename takes precedence over sorting by section
1183 if (wild
->filenames_sorted
)
1185 const char *fn
, *ln
;
1189 /* The PE support for the .idata section as generated by
1190 dlltool assumes that files will be sorted by the name of
1191 the archive and then the name of the file within the
1194 if (file
->the_bfd
!= NULL
1195 && bfd_my_archive (file
->the_bfd
) != NULL
)
1197 fn
= bfd_get_filename (bfd_my_archive (file
->the_bfd
));
1202 fn
= file
->filename
;
1206 if (ls
->ifile
->the_bfd
!= NULL
1207 && bfd_my_archive (ls
->ifile
->the_bfd
) != NULL
)
1209 ln
= bfd_get_filename (bfd_my_archive (ls
->ifile
->the_bfd
));
1214 ln
= ls
->ifile
->filename
;
1218 i
= strcmp (fn
, ln
);
1227 fn
= file
->filename
;
1229 ln
= ls
->ifile
->filename
;
1231 i
= strcmp (fn
, ln
);
1239 /* Here either the files are not sorted by name, or we are
1240 looking at the sections for this file. */
1242 if (sec
!= NULL
&& sec
->spec
.sorted
)
1244 if (strcmp (section_name
,
1245 bfd_get_section_name (ls
->ifile
->the_bfd
,
1255 /* Expand a wild statement for a particular FILE. SECTION may be
1256 NULL, in which case it is a wild card. */
1259 output_section_callback (lang_wild_statement_type
*ptr
,
1260 struct wildcard_list
*sec
,
1262 lang_input_statement_type
*file
,
1265 lang_statement_union_type
*before
;
1267 /* Exclude sections that match UNIQUE_SECTION_LIST. */
1268 if (unique_section_p (bfd_get_section_name (file
->the_bfd
, section
)))
1271 /* If the wild pattern was marked KEEP, the member sections
1272 should be as well. */
1273 if (ptr
->keep_sections
)
1274 section
->flags
|= SEC_KEEP
;
1276 before
= wild_sort (ptr
, sec
, file
, section
);
1278 /* Here BEFORE points to the lang_input_section which
1279 should follow the one we are about to add. If BEFORE
1280 is NULL, then the section should just go at the end
1281 of the current list. */
1284 lang_add_section (&ptr
->children
, section
,
1285 (lang_output_section_statement_type
*) output
,
1289 lang_statement_list_type list
;
1290 lang_statement_union_type
**pp
;
1292 lang_list_init (&list
);
1293 lang_add_section (&list
, section
,
1294 (lang_output_section_statement_type
*) output
,
1297 /* If we are discarding the section, LIST.HEAD will
1299 if (list
.head
!= NULL
)
1301 ASSERT (list
.head
->header
.next
== NULL
);
1303 for (pp
= &ptr
->children
.head
;
1305 pp
= &(*pp
)->header
.next
)
1306 ASSERT (*pp
!= NULL
);
1308 list
.head
->header
.next
= *pp
;
1314 /* This is passed a file name which must have been seen already and
1315 added to the statement tree. We will see if it has been opened
1316 already and had its symbols read. If not then we'll read it. */
1318 static lang_input_statement_type
*
1319 lookup_name (const char *name
)
1321 lang_input_statement_type
*search
;
1323 for (search
= (lang_input_statement_type
*) input_file_chain
.head
;
1325 search
= (lang_input_statement_type
*) search
->next_real_file
)
1327 /* Use the local_sym_name as the name of the file that has
1328 already been loaded as filename might have been transformed
1329 via the search directory lookup mechanism. */
1330 const char * filename
= search
->local_sym_name
;
1332 if (filename
== NULL
&& name
== NULL
)
1334 if (filename
!= NULL
1336 && strcmp (filename
, name
) == 0)
1341 search
= new_afile (name
, lang_input_file_is_search_file_enum
, default_target
,
1344 /* If we have already added this file, or this file is not real
1345 (FIXME: can that ever actually happen?) or the name is NULL
1346 (FIXME: can that ever actually happen?) don't add this file. */
1349 || search
->filename
== NULL
)
1352 if (! load_symbols (search
, NULL
))
1358 /* Get the symbols for an input file. */
1361 load_symbols (lang_input_statement_type
*entry
,
1362 lang_statement_list_type
*place
)
1369 ldfile_open_file (entry
);
1371 if (! bfd_check_format (entry
->the_bfd
, bfd_archive
)
1372 && ! bfd_check_format_matches (entry
->the_bfd
, bfd_object
, &matching
))
1375 lang_statement_list_type
*hold
;
1376 bfd_boolean bad_load
= TRUE
;
1377 bfd_boolean save_ldlang_sysrooted_script
;
1379 err
= bfd_get_error ();
1381 /* See if the emulation has some special knowledge. */
1382 if (ldemul_unrecognized_file (entry
))
1385 if (err
== bfd_error_file_ambiguously_recognized
)
1389 einfo (_("%B: file not recognized: %E\n"), entry
->the_bfd
);
1390 einfo (_("%B: matching formats:"), entry
->the_bfd
);
1391 for (p
= matching
; *p
!= NULL
; p
++)
1395 else if (err
!= bfd_error_file_not_recognized
1397 einfo (_("%F%B: file not recognized: %E\n"), entry
->the_bfd
);
1401 bfd_close (entry
->the_bfd
);
1402 entry
->the_bfd
= NULL
;
1404 /* Try to interpret the file as a linker script. */
1405 ldfile_open_command_file (entry
->filename
);
1409 save_ldlang_sysrooted_script
= ldlang_sysrooted_script
;
1410 ldlang_sysrooted_script
= entry
->sysrooted
;
1412 ldfile_assumed_script
= TRUE
;
1413 parser_input
= input_script
;
1415 ldfile_assumed_script
= FALSE
;
1417 ldlang_sysrooted_script
= save_ldlang_sysrooted_script
;
1423 if (ldemul_recognized_file (entry
))
1426 /* We don't call ldlang_add_file for an archive. Instead, the
1427 add_symbols entry point will call ldlang_add_file, via the
1428 add_archive_element callback, for each element of the archive
1430 switch (bfd_get_format (entry
->the_bfd
))
1436 ldlang_add_file (entry
);
1437 if (trace_files
|| trace_file_tries
)
1438 info_msg ("%I\n", entry
);
1442 if (entry
->whole_archive
)
1445 bfd_boolean loaded
= TRUE
;
1449 member
= bfd_openr_next_archived_file (entry
->the_bfd
, member
);
1454 if (! bfd_check_format (member
, bfd_object
))
1456 einfo (_("%F%B: member %B in archive is not an object\n"),
1457 entry
->the_bfd
, member
);
1461 if (! ((*link_info
.callbacks
->add_archive_element
)
1462 (&link_info
, member
, "--whole-archive")))
1465 if (! bfd_link_add_symbols (member
, &link_info
))
1467 einfo (_("%F%B: could not read symbols: %E\n"), member
);
1472 entry
->loaded
= loaded
;
1478 if (bfd_link_add_symbols (entry
->the_bfd
, &link_info
))
1479 entry
->loaded
= TRUE
;
1481 einfo (_("%F%B: could not read symbols: %E\n"), entry
->the_bfd
);
1483 return entry
->loaded
;
1486 /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both
1487 may be NULL, indicating that it is a wildcard. Separate
1488 lang_input_section statements are created for each part of the
1489 expansion; they are added after the wild statement S. OUTPUT is
1490 the output section. */
1493 wild (lang_wild_statement_type
*s
,
1494 const char *target ATTRIBUTE_UNUSED
,
1495 lang_output_section_statement_type
*output
)
1497 struct wildcard_list
*sec
;
1499 walk_wild (s
, output_section_callback
, output
);
1501 for (sec
= s
->section_list
; sec
!= NULL
; sec
= sec
->next
)
1503 if (default_common_section
!= NULL
)
1505 if (sec
->spec
.name
!= NULL
&& strcmp (sec
->spec
.name
, "COMMON") == 0)
1507 /* Remember the section that common is going to in case we
1508 later get something which doesn't know where to put it. */
1509 default_common_section
= output
;
1514 /* Return TRUE iff target is the sought target. */
1517 get_target (const bfd_target
*target
, void *data
)
1519 const char *sought
= data
;
1521 return strcmp (target
->name
, sought
) == 0;
1524 /* Like strcpy() but convert to lower case as well. */
1527 stricpy (char *dest
, char *src
)
1531 while ((c
= *src
++) != 0)
1532 *dest
++ = TOLOWER (c
);
1537 /* Remove the first occurrence of needle (if any) in haystack
1541 strcut (char *haystack
, char *needle
)
1543 haystack
= strstr (haystack
, needle
);
1549 for (src
= haystack
+ strlen (needle
); *src
;)
1550 *haystack
++ = *src
++;
1556 /* Compare two target format name strings.
1557 Return a value indicating how "similar" they are. */
1560 name_compare (char *first
, char *second
)
1566 copy1
= xmalloc (strlen (first
) + 1);
1567 copy2
= xmalloc (strlen (second
) + 1);
1569 /* Convert the names to lower case. */
1570 stricpy (copy1
, first
);
1571 stricpy (copy2
, second
);
1573 /* Remove size and endian strings from the name. */
1574 strcut (copy1
, "big");
1575 strcut (copy1
, "little");
1576 strcut (copy2
, "big");
1577 strcut (copy2
, "little");
1579 /* Return a value based on how many characters match,
1580 starting from the beginning. If both strings are
1581 the same then return 10 * their length. */
1582 for (result
= 0; copy1
[result
] == copy2
[result
]; result
++)
1583 if (copy1
[result
] == 0)
1595 /* Set by closest_target_match() below. */
1596 static const bfd_target
*winner
;
1598 /* Scan all the valid bfd targets looking for one that has the endianness
1599 requirement that was specified on the command line, and is the nearest
1600 match to the original output target. */
1603 closest_target_match (const bfd_target
*target
, void *data
)
1605 const bfd_target
*original
= data
;
1607 if (command_line
.endian
== ENDIAN_BIG
1608 && target
->byteorder
!= BFD_ENDIAN_BIG
)
1611 if (command_line
.endian
== ENDIAN_LITTLE
1612 && target
->byteorder
!= BFD_ENDIAN_LITTLE
)
1615 /* Must be the same flavour. */
1616 if (target
->flavour
!= original
->flavour
)
1619 /* If we have not found a potential winner yet, then record this one. */
1626 /* Oh dear, we now have two potential candidates for a successful match.
1627 Compare their names and choose the better one. */
1628 if (name_compare (target
->name
, original
->name
)
1629 > name_compare (winner
->name
, original
->name
))
1632 /* Keep on searching until wqe have checked them all. */
1636 /* Return the BFD target format of the first input file. */
1639 get_first_input_target (void)
1641 char *target
= NULL
;
1643 LANG_FOR_EACH_INPUT_STATEMENT (s
)
1645 if (s
->header
.type
== lang_input_statement_enum
1648 ldfile_open_file (s
);
1650 if (s
->the_bfd
!= NULL
1651 && bfd_check_format (s
->the_bfd
, bfd_object
))
1653 target
= bfd_get_target (s
->the_bfd
);
1665 lang_get_output_target (void)
1669 /* Has the user told us which output format to use? */
1670 if (output_target
!= NULL
)
1671 return output_target
;
1673 /* No - has the current target been set to something other than
1675 if (current_target
!= default_target
)
1676 return current_target
;
1678 /* No - can we determine the format of the first input file? */
1679 target
= get_first_input_target ();
1683 /* Failed - use the default output target. */
1684 return default_target
;
1687 /* Open the output file. */
1690 open_output (const char *name
)
1694 output_target
= lang_get_output_target ();
1696 /* Has the user requested a particular endianness on the command
1698 if (command_line
.endian
!= ENDIAN_UNSET
)
1700 const bfd_target
*target
;
1701 enum bfd_endian desired_endian
;
1703 /* Get the chosen target. */
1704 target
= bfd_search_for_target (get_target
, (void *) output_target
);
1706 /* If the target is not supported, we cannot do anything. */
1709 if (command_line
.endian
== ENDIAN_BIG
)
1710 desired_endian
= BFD_ENDIAN_BIG
;
1712 desired_endian
= BFD_ENDIAN_LITTLE
;
1714 /* See if the target has the wrong endianness. This should
1715 not happen if the linker script has provided big and
1716 little endian alternatives, but some scrips don't do
1718 if (target
->byteorder
!= desired_endian
)
1720 /* If it does, then see if the target provides
1721 an alternative with the correct endianness. */
1722 if (target
->alternative_target
!= NULL
1723 && (target
->alternative_target
->byteorder
== desired_endian
))
1724 output_target
= target
->alternative_target
->name
;
1727 /* Try to find a target as similar as possible to
1728 the default target, but which has the desired
1729 endian characteristic. */
1730 bfd_search_for_target (closest_target_match
,
1733 /* Oh dear - we could not find any targets that
1734 satisfy our requirements. */
1736 einfo (_("%P: warning: could not find any targets that match endianness requirement\n"));
1738 output_target
= winner
->name
;
1744 output
= bfd_openw (name
, output_target
);
1748 if (bfd_get_error () == bfd_error_invalid_target
)
1749 einfo (_("%P%F: target %s not found\n"), output_target
);
1751 einfo (_("%P%F: cannot open output file %s: %E\n"), name
);
1754 delete_output_file_on_failure
= TRUE
;
1757 output
->flags
|= D_PAGED
;
1760 if (! bfd_set_format (output
, bfd_object
))
1761 einfo (_("%P%F:%s: can not make object file: %E\n"), name
);
1762 if (! bfd_set_arch_mach (output
,
1763 ldfile_output_architecture
,
1764 ldfile_output_machine
))
1765 einfo (_("%P%F:%s: can not set architecture: %E\n"), name
);
1767 link_info
.hash
= bfd_link_hash_table_create (output
);
1768 if (link_info
.hash
== NULL
)
1769 einfo (_("%P%F: can not create link hash table: %E\n"));
1771 bfd_set_gp_size (output
, g_switch_value
);
1776 ldlang_open_output (lang_statement_union_type
*statement
)
1778 switch (statement
->header
.type
)
1780 case lang_output_statement_enum
:
1781 ASSERT (output_bfd
== NULL
);
1782 output_bfd
= open_output (statement
->output_statement
.name
);
1783 ldemul_set_output_arch ();
1784 if (config
.magic_demand_paged
&& !link_info
.relocatable
)
1785 output_bfd
->flags
|= D_PAGED
;
1787 output_bfd
->flags
&= ~D_PAGED
;
1788 if (config
.text_read_only
)
1789 output_bfd
->flags
|= WP_TEXT
;
1791 output_bfd
->flags
&= ~WP_TEXT
;
1792 if (link_info
.traditional_format
)
1793 output_bfd
->flags
|= BFD_TRADITIONAL_FORMAT
;
1795 output_bfd
->flags
&= ~BFD_TRADITIONAL_FORMAT
;
1798 case lang_target_statement_enum
:
1799 current_target
= statement
->target_statement
.target
;
1806 /* Convert between addresses in bytes and sizes in octets.
1807 For currently supported targets, octets_per_byte is always a power
1808 of two, so we can use shifts. */
1809 #define TO_ADDR(X) ((X) >> opb_shift)
1810 #define TO_SIZE(X) ((X) << opb_shift)
1812 /* Support the above. */
1813 static unsigned int opb_shift
= 0;
1818 unsigned x
= bfd_arch_mach_octets_per_byte (ldfile_output_architecture
,
1819 ldfile_output_machine
);
1822 while ((x
& 1) == 0)
1830 /* Open all the input files. */
1833 open_input_bfds (lang_statement_union_type
*s
, bfd_boolean force
)
1835 for (; s
!= NULL
; s
= s
->header
.next
)
1837 switch (s
->header
.type
)
1839 case lang_constructors_statement_enum
:
1840 open_input_bfds (constructor_list
.head
, force
);
1842 case lang_output_section_statement_enum
:
1843 open_input_bfds (s
->output_section_statement
.children
.head
, force
);
1845 case lang_wild_statement_enum
:
1846 /* Maybe we should load the file's symbols. */
1847 if (s
->wild_statement
.filename
1848 && ! wildcardp (s
->wild_statement
.filename
))
1849 (void) lookup_name (s
->wild_statement
.filename
);
1850 open_input_bfds (s
->wild_statement
.children
.head
, force
);
1852 case lang_group_statement_enum
:
1854 struct bfd_link_hash_entry
*undefs
;
1856 /* We must continually search the entries in the group
1857 until no new symbols are added to the list of undefined
1862 undefs
= link_info
.hash
->undefs_tail
;
1863 open_input_bfds (s
->group_statement
.children
.head
, TRUE
);
1865 while (undefs
!= link_info
.hash
->undefs_tail
);
1868 case lang_target_statement_enum
:
1869 current_target
= s
->target_statement
.target
;
1871 case lang_input_statement_enum
:
1872 if (s
->input_statement
.real
)
1874 lang_statement_list_type add
;
1876 s
->input_statement
.target
= current_target
;
1878 /* If we are being called from within a group, and this
1879 is an archive which has already been searched, then
1880 force it to be researched unless the whole archive
1881 has been loaded already. */
1883 && !s
->input_statement
.whole_archive
1884 && s
->input_statement
.loaded
1885 && bfd_check_format (s
->input_statement
.the_bfd
,
1887 s
->input_statement
.loaded
= FALSE
;
1889 lang_list_init (&add
);
1891 if (! load_symbols (&s
->input_statement
, &add
))
1892 config
.make_executable
= FALSE
;
1894 if (add
.head
!= NULL
)
1896 *add
.tail
= s
->header
.next
;
1897 s
->header
.next
= add
.head
;
1907 /* If there are [COMMONS] statements, put a wild one into the bss
1911 lang_reasonable_defaults (void)
1914 lang_output_section_statement_lookup (".text");
1915 lang_output_section_statement_lookup (".data");
1917 default_common_section
= lang_output_section_statement_lookup (".bss");
1919 if (!placed_commons
)
1921 lang_wild_statement_type
*new =
1922 new_stat (lang_wild_statement
,
1923 &default_common_section
->children
);
1925 new->section_name
= "COMMON";
1926 new->filename
= NULL
;
1927 lang_list_init (&new->children
);
1932 /* Add a symbol to a hash of symbols used in DEFINED (NAME) expressions. */
1935 lang_track_definedness (const char *name
)
1937 if (bfd_hash_lookup (&lang_definedness_table
, name
, TRUE
, FALSE
) == NULL
)
1938 einfo (_("%P%F: bfd_hash_lookup failed creating symbol %s\n"), name
);
1941 /* New-function for the definedness hash table. */
1943 static struct bfd_hash_entry
*
1944 lang_definedness_newfunc (struct bfd_hash_entry
*entry
,
1945 struct bfd_hash_table
*table ATTRIBUTE_UNUSED
,
1946 const char *name ATTRIBUTE_UNUSED
)
1948 struct lang_definedness_hash_entry
*ret
1949 = (struct lang_definedness_hash_entry
*) entry
;
1952 ret
= (struct lang_definedness_hash_entry
*)
1953 bfd_hash_allocate (table
, sizeof (struct lang_definedness_hash_entry
));
1956 einfo (_("%P%F: bfd_hash_allocate failed creating symbol %s\n"), name
);
1958 ret
->iteration
= -1;
1962 /* Return the iteration when the definition of NAME was last updated. A
1963 value of -1 means that the symbol is not defined in the linker script
1964 or the command line, but may be defined in the linker symbol table. */
1967 lang_symbol_definition_iteration (const char *name
)
1969 struct lang_definedness_hash_entry
*defentry
1970 = (struct lang_definedness_hash_entry
*)
1971 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
1973 /* We've already created this one on the presence of DEFINED in the
1974 script, so it can't be NULL unless something is borked elsewhere in
1976 if (defentry
== NULL
)
1979 return defentry
->iteration
;
1982 /* Update the definedness state of NAME. */
1985 lang_update_definedness (const char *name
, struct bfd_link_hash_entry
*h
)
1987 struct lang_definedness_hash_entry
*defentry
1988 = (struct lang_definedness_hash_entry
*)
1989 bfd_hash_lookup (&lang_definedness_table
, name
, FALSE
, FALSE
);
1991 /* We don't keep track of symbols not tested with DEFINED. */
1992 if (defentry
== NULL
)
1995 /* If the symbol was already defined, and not from an earlier statement
1996 iteration, don't update the definedness iteration, because that'd
1997 make the symbol seem defined in the linker script at this point, and
1998 it wasn't; it was defined in some object. If we do anyway, DEFINED
1999 would start to yield false before this point and the construct "sym =
2000 DEFINED (sym) ? sym : X;" would change sym to X despite being defined
2002 if (h
->type
!= bfd_link_hash_undefined
2003 && h
->type
!= bfd_link_hash_common
2004 && h
->type
!= bfd_link_hash_new
2005 && defentry
->iteration
== -1)
2008 defentry
->iteration
= lang_statement_iteration
;
2011 /* Add the supplied name to the symbol table as an undefined reference.
2012 This is a two step process as the symbol table doesn't even exist at
2013 the time the ld command line is processed. First we put the name
2014 on a list, then, once the output file has been opened, transfer the
2015 name to the symbol table. */
2017 typedef struct bfd_sym_chain ldlang_undef_chain_list_type
;
2019 #define ldlang_undef_chain_list_head entry_symbol.next
2022 ldlang_add_undef (const char *const name
)
2024 ldlang_undef_chain_list_type
*new =
2025 stat_alloc (sizeof (ldlang_undef_chain_list_type
));
2027 new->next
= ldlang_undef_chain_list_head
;
2028 ldlang_undef_chain_list_head
= new;
2030 new->name
= xstrdup (name
);
2032 if (output_bfd
!= NULL
)
2033 insert_undefined (new->name
);
2036 /* Insert NAME as undefined in the symbol table. */
2039 insert_undefined (const char *name
)
2041 struct bfd_link_hash_entry
*h
;
2043 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, FALSE
, TRUE
);
2045 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
2046 if (h
->type
== bfd_link_hash_new
)
2048 h
->type
= bfd_link_hash_undefined
;
2049 h
->u
.undef
.abfd
= NULL
;
2050 bfd_link_add_undef (link_info
.hash
, h
);
2054 /* Run through the list of undefineds created above and place them
2055 into the linker hash table as undefined symbols belonging to the
2059 lang_place_undefineds (void)
2061 ldlang_undef_chain_list_type
*ptr
;
2063 for (ptr
= ldlang_undef_chain_list_head
; ptr
!= NULL
; ptr
= ptr
->next
)
2064 insert_undefined (ptr
->name
);
2067 /* Open input files and attach to output sections. */
2070 map_input_to_output_sections
2071 (lang_statement_union_type
*s
, const char *target
,
2072 lang_output_section_statement_type
*output_section_statement
)
2074 for (; s
!= NULL
; s
= s
->header
.next
)
2076 switch (s
->header
.type
)
2078 case lang_wild_statement_enum
:
2079 wild (&s
->wild_statement
, target
, output_section_statement
);
2081 case lang_constructors_statement_enum
:
2082 map_input_to_output_sections (constructor_list
.head
,
2084 output_section_statement
);
2086 case lang_output_section_statement_enum
:
2087 map_input_to_output_sections (s
->output_section_statement
.children
.head
,
2089 &s
->output_section_statement
);
2091 case lang_output_statement_enum
:
2093 case lang_target_statement_enum
:
2094 target
= s
->target_statement
.target
;
2096 case lang_group_statement_enum
:
2097 map_input_to_output_sections (s
->group_statement
.children
.head
,
2099 output_section_statement
);
2101 case lang_data_statement_enum
:
2102 /* Make sure that any sections mentioned in the expression
2104 exp_init_os (s
->data_statement
.exp
);
2106 case lang_fill_statement_enum
:
2107 case lang_input_section_enum
:
2108 case lang_object_symbols_statement_enum
:
2109 case lang_reloc_statement_enum
:
2110 case lang_padding_statement_enum
:
2111 case lang_input_statement_enum
:
2112 if (output_section_statement
!= NULL
2113 && output_section_statement
->bfd_section
== NULL
)
2114 init_os (output_section_statement
);
2116 case lang_assignment_statement_enum
:
2117 if (output_section_statement
!= NULL
2118 && output_section_statement
->bfd_section
== NULL
)
2119 init_os (output_section_statement
);
2121 /* Make sure that any sections mentioned in the assignment
2123 exp_init_os (s
->assignment_statement
.exp
);
2125 case lang_afile_asection_pair_statement_enum
:
2128 case lang_address_statement_enum
:
2129 /* Mark the specified section with the supplied address. */
2131 lang_output_section_statement_type
*os
=
2132 lang_output_section_statement_lookup
2133 (s
->address_statement
.section_name
);
2135 if (os
->bfd_section
== NULL
)
2137 os
->addr_tree
= s
->address_statement
.address
;
2144 /* An output section might have been removed after its statement was
2145 added. For example, ldemul_before_allocation can remove dynamic
2146 sections if they turn out to be not needed. Clean them up here. */
2149 strip_excluded_output_sections (void)
2151 lang_statement_union_type
*u
;
2153 for (u
= lang_output_section_statement
.head
;
2155 u
= u
->output_section_statement
.next
)
2157 lang_output_section_statement_type
*os
;
2160 os
= &u
->output_section_statement
;
2161 s
= os
->bfd_section
;
2162 if (s
!= NULL
&& (s
->flags
& SEC_EXCLUDE
) != 0)
2166 os
->bfd_section
= NULL
;
2168 for (p
= &output_bfd
->sections
; *p
; p
= &(*p
)->next
)
2171 bfd_section_list_remove (output_bfd
, p
);
2172 output_bfd
->section_count
--;
2180 print_output_section_statement
2181 (lang_output_section_statement_type
*output_section_statement
)
2183 asection
*section
= output_section_statement
->bfd_section
;
2186 if (output_section_statement
!= abs_output_section
)
2188 minfo ("\n%s", output_section_statement
->name
);
2190 if (section
!= NULL
)
2192 print_dot
= section
->vma
;
2194 len
= strlen (output_section_statement
->name
);
2195 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
2200 while (len
< SECTION_NAME_MAP_LENGTH
)
2206 minfo ("0x%V %W", section
->vma
, section
->_raw_size
);
2208 if (output_section_statement
->load_base
!= NULL
)
2212 addr
= exp_get_abs_int (output_section_statement
->load_base
, 0,
2213 "load base", lang_final_phase_enum
);
2214 minfo (_(" load address 0x%V"), addr
);
2221 print_statement_list (output_section_statement
->children
.head
,
2222 output_section_statement
);
2226 print_assignment (lang_assignment_statement_type
*assignment
,
2227 lang_output_section_statement_type
*output_section
)
2230 etree_value_type result
;
2232 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
2235 result
= exp_fold_tree (assignment
->exp
->assign
.src
, output_section
,
2236 lang_final_phase_enum
, print_dot
, &print_dot
);
2242 value
= result
.value
+ result
.section
->bfd_section
->vma
;
2243 dst
= assignment
->exp
->assign
.dst
;
2245 minfo ("0x%V", value
);
2246 if (dst
[0] == '.' && dst
[1] == 0)
2259 exp_print_tree (assignment
->exp
);
2265 print_input_statement (lang_input_statement_type
*statm
)
2267 if (statm
->filename
!= NULL
)
2269 fprintf (config
.map_file
, "LOAD %s\n", statm
->filename
);
2273 /* Print all symbols defined in a particular section. This is called
2274 via bfd_link_hash_traverse. */
2277 print_one_symbol (struct bfd_link_hash_entry
*hash_entry
, void *ptr
)
2279 asection
*sec
= ptr
;
2281 if ((hash_entry
->type
== bfd_link_hash_defined
2282 || hash_entry
->type
== bfd_link_hash_defweak
)
2283 && sec
== hash_entry
->u
.def
.section
)
2287 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
2290 (hash_entry
->u
.def
.value
2291 + hash_entry
->u
.def
.section
->output_offset
2292 + hash_entry
->u
.def
.section
->output_section
->vma
));
2294 minfo (" %T\n", hash_entry
->root
.string
);
2300 /* Print information about an input section to the map file. */
2303 print_input_section (lang_input_section_type
*in
)
2305 asection
*i
= in
->section
;
2306 bfd_size_type size
= i
->_cooked_size
!= 0 ? i
->_cooked_size
: i
->_raw_size
;
2313 minfo ("%s", i
->name
);
2315 if (i
->output_section
!= NULL
)
2319 len
= 1 + strlen (i
->name
);
2320 if (len
>= SECTION_NAME_MAP_LENGTH
- 1)
2325 while (len
< SECTION_NAME_MAP_LENGTH
)
2331 minfo ("0x%V %W %B\n",
2332 i
->output_section
->vma
+ i
->output_offset
, TO_ADDR (size
),
2335 if (i
->_cooked_size
!= 0 && i
->_cooked_size
!= i
->_raw_size
)
2337 len
= SECTION_NAME_MAP_LENGTH
+ 3;
2349 minfo (_("%W (size before relaxing)\n"), i
->_raw_size
);
2352 bfd_link_hash_traverse (link_info
.hash
, print_one_symbol
, i
);
2354 print_dot
= (i
->output_section
->vma
+ i
->output_offset
2361 print_fill_statement (lang_fill_statement_type
*fill
)
2365 fputs (" FILL mask 0x", config
.map_file
);
2366 for (p
= fill
->fill
->data
, size
= fill
->fill
->size
; size
!= 0; p
++, size
--)
2367 fprintf (config
.map_file
, "%02x", *p
);
2368 fputs ("\n", config
.map_file
);
2372 print_data_statement (lang_data_statement_type
*data
)
2380 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
2383 addr
= data
->output_vma
;
2384 if (data
->output_section
!= NULL
)
2385 addr
+= data
->output_section
->vma
;
2413 minfo ("0x%V %W %s 0x%v", addr
, size
, name
, data
->value
);
2415 if (data
->exp
->type
.node_class
!= etree_value
)
2418 exp_print_tree (data
->exp
);
2423 print_dot
= addr
+ TO_ADDR (size
);
2426 /* Print an address statement. These are generated by options like
2430 print_address_statement (lang_address_statement_type
*address
)
2432 minfo (_("Address of section %s set to "), address
->section_name
);
2433 exp_print_tree (address
->address
);
2437 /* Print a reloc statement. */
2440 print_reloc_statement (lang_reloc_statement_type
*reloc
)
2447 for (i
= 0; i
< SECTION_NAME_MAP_LENGTH
; i
++)
2450 addr
= reloc
->output_vma
;
2451 if (reloc
->output_section
!= NULL
)
2452 addr
+= reloc
->output_section
->vma
;
2454 size
= bfd_get_reloc_size (reloc
->howto
);
2456 minfo ("0x%V %W RELOC %s ", addr
, size
, reloc
->howto
->name
);
2458 if (reloc
->name
!= NULL
)
2459 minfo ("%s+", reloc
->name
);
2461 minfo ("%s+", reloc
->section
->name
);
2463 exp_print_tree (reloc
->addend_exp
);
2467 print_dot
= addr
+ TO_ADDR (size
);
2471 print_padding_statement (lang_padding_statement_type
*s
)
2479 len
= sizeof " *fill*" - 1;
2480 while (len
< SECTION_NAME_MAP_LENGTH
)
2486 addr
= s
->output_offset
;
2487 if (s
->output_section
!= NULL
)
2488 addr
+= s
->output_section
->vma
;
2489 minfo ("0x%V %W ", addr
, s
->size
);
2491 if (s
->fill
->size
!= 0)
2495 for (p
= s
->fill
->data
, size
= s
->fill
->size
; size
!= 0; p
++, size
--)
2496 fprintf (config
.map_file
, "%02x", *p
);
2501 print_dot
= addr
+ TO_ADDR (s
->size
);
2505 print_wild_statement (lang_wild_statement_type
*w
,
2506 lang_output_section_statement_type
*os
)
2508 struct wildcard_list
*sec
;
2512 if (w
->filenames_sorted
)
2514 if (w
->filename
!= NULL
)
2515 minfo ("%s", w
->filename
);
2518 if (w
->filenames_sorted
)
2522 for (sec
= w
->section_list
; sec
; sec
= sec
->next
)
2524 if (sec
->spec
.sorted
)
2526 if (sec
->spec
.exclude_name_list
!= NULL
)
2529 minfo ("EXCLUDE_FILE(%s", sec
->spec
.exclude_name_list
->name
);
2530 for (tmp
= sec
->spec
.exclude_name_list
->next
; tmp
; tmp
= tmp
->next
)
2531 minfo (" %s", tmp
->name
);
2534 if (sec
->spec
.name
!= NULL
)
2535 minfo ("%s", sec
->spec
.name
);
2538 if (sec
->spec
.sorted
)
2547 print_statement_list (w
->children
.head
, os
);
2550 /* Print a group statement. */
2553 print_group (lang_group_statement_type
*s
,
2554 lang_output_section_statement_type
*os
)
2556 fprintf (config
.map_file
, "START GROUP\n");
2557 print_statement_list (s
->children
.head
, os
);
2558 fprintf (config
.map_file
, "END GROUP\n");
2561 /* Print the list of statements in S.
2562 This can be called for any statement type. */
2565 print_statement_list (lang_statement_union_type
*s
,
2566 lang_output_section_statement_type
*os
)
2570 print_statement (s
, os
);
2575 /* Print the first statement in statement list S.
2576 This can be called for any statement type. */
2579 print_statement (lang_statement_union_type
*s
,
2580 lang_output_section_statement_type
*os
)
2582 switch (s
->header
.type
)
2585 fprintf (config
.map_file
, _("Fail with %d\n"), s
->header
.type
);
2588 case lang_constructors_statement_enum
:
2589 if (constructor_list
.head
!= NULL
)
2591 if (constructors_sorted
)
2592 minfo (" SORT (CONSTRUCTORS)\n");
2594 minfo (" CONSTRUCTORS\n");
2595 print_statement_list (constructor_list
.head
, os
);
2598 case lang_wild_statement_enum
:
2599 print_wild_statement (&s
->wild_statement
, os
);
2601 case lang_address_statement_enum
:
2602 print_address_statement (&s
->address_statement
);
2604 case lang_object_symbols_statement_enum
:
2605 minfo (" CREATE_OBJECT_SYMBOLS\n");
2607 case lang_fill_statement_enum
:
2608 print_fill_statement (&s
->fill_statement
);
2610 case lang_data_statement_enum
:
2611 print_data_statement (&s
->data_statement
);
2613 case lang_reloc_statement_enum
:
2614 print_reloc_statement (&s
->reloc_statement
);
2616 case lang_input_section_enum
:
2617 print_input_section (&s
->input_section
);
2619 case lang_padding_statement_enum
:
2620 print_padding_statement (&s
->padding_statement
);
2622 case lang_output_section_statement_enum
:
2623 print_output_section_statement (&s
->output_section_statement
);
2625 case lang_assignment_statement_enum
:
2626 print_assignment (&s
->assignment_statement
, os
);
2628 case lang_target_statement_enum
:
2629 fprintf (config
.map_file
, "TARGET(%s)\n", s
->target_statement
.target
);
2631 case lang_output_statement_enum
:
2632 minfo ("OUTPUT(%s", s
->output_statement
.name
);
2633 if (output_target
!= NULL
)
2634 minfo (" %s", output_target
);
2637 case lang_input_statement_enum
:
2638 print_input_statement (&s
->input_statement
);
2640 case lang_group_statement_enum
:
2641 print_group (&s
->group_statement
, os
);
2643 case lang_afile_asection_pair_statement_enum
:
2650 print_statements (void)
2652 print_statement_list (statement_list
.head
, abs_output_section
);
2655 /* Print the first N statements in statement list S to STDERR.
2656 If N == 0, nothing is printed.
2657 If N < 0, the entire list is printed.
2658 Intended to be called from GDB. */
2661 dprint_statement (lang_statement_union_type
*s
, int n
)
2663 FILE *map_save
= config
.map_file
;
2665 config
.map_file
= stderr
;
2668 print_statement_list (s
, abs_output_section
);
2671 while (s
&& --n
>= 0)
2673 print_statement (s
, abs_output_section
);
2678 config
.map_file
= map_save
;
2682 insert_pad (lang_statement_union_type
**ptr
,
2684 unsigned int alignment_needed
,
2685 asection
*output_section
,
2688 static fill_type zero_fill
= { 1, { 0 } };
2689 lang_statement_union_type
*pad
;
2691 pad
= ((lang_statement_union_type
*)
2692 ((char *) ptr
- offsetof (lang_statement_union_type
, header
.next
)));
2693 if (ptr
!= &statement_list
.head
2694 && pad
->header
.type
== lang_padding_statement_enum
2695 && pad
->padding_statement
.output_section
== output_section
)
2697 /* Use the existing pad statement. The above test on output
2698 section is probably redundant, but it doesn't hurt to check. */
2702 /* Make a new padding statement, linked into existing chain. */
2703 pad
= stat_alloc (sizeof (lang_padding_statement_type
));
2704 pad
->header
.next
= *ptr
;
2706 pad
->header
.type
= lang_padding_statement_enum
;
2707 pad
->padding_statement
.output_section
= output_section
;
2710 pad
->padding_statement
.fill
= fill
;
2712 pad
->padding_statement
.output_offset
= dot
- output_section
->vma
;
2713 pad
->padding_statement
.size
= alignment_needed
;
2714 output_section
->_raw_size
+= alignment_needed
;
2717 /* Work out how much this section will move the dot point. */
2720 size_input_section (lang_statement_union_type
**this_ptr
,
2721 lang_output_section_statement_type
*output_section_statement
,
2725 lang_input_section_type
*is
= &((*this_ptr
)->input_section
);
2726 asection
*i
= is
->section
;
2728 if (!is
->ifile
->just_syms_flag
)
2730 unsigned int alignment_needed
;
2733 /* Align this section first to the input sections requirement,
2734 then to the output section's requirement. If this alignment
2735 is greater than any seen before, then record it too. Perform
2736 the alignment by inserting a magic 'padding' statement. */
2738 if (output_section_statement
->subsection_alignment
!= -1)
2739 i
->alignment_power
= output_section_statement
->subsection_alignment
;
2741 o
= output_section_statement
->bfd_section
;
2742 if (o
->alignment_power
< i
->alignment_power
)
2743 o
->alignment_power
= i
->alignment_power
;
2745 alignment_needed
= align_power (dot
, i
->alignment_power
) - dot
;
2747 if (alignment_needed
!= 0)
2749 insert_pad (this_ptr
, fill
, TO_SIZE (alignment_needed
), o
, dot
);
2750 dot
+= alignment_needed
;
2753 /* Remember where in the output section this input section goes. */
2755 i
->output_offset
= dot
- o
->vma
;
2757 /* Mark how big the output section must be to contain this now. */
2758 if (i
->_cooked_size
!= 0)
2759 dot
+= TO_ADDR (i
->_cooked_size
);
2761 dot
+= TO_ADDR (i
->_raw_size
);
2762 o
->_raw_size
= TO_SIZE (dot
- o
->vma
);
2766 i
->output_offset
= i
->vma
- output_section_statement
->bfd_section
->vma
;
2772 #define IGNORE_SECTION(bfd, s) \
2773 (((bfd_get_section_flags (bfd, s) & (SEC_ALLOC | SEC_NEVER_LOAD)) \
2775 || bfd_section_size (bfd, s) == 0)
2777 /* Check to see if any allocated sections overlap with other allocated
2778 sections. This can happen when the linker script specifically specifies
2779 the output section addresses of the two sections. */
2782 lang_check_section_addresses (void)
2786 /* Scan all sections in the output list. */
2787 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
2791 /* Ignore sections which are not loaded or which have no contents. */
2792 if (IGNORE_SECTION (output_bfd
, s
))
2795 /* Once we reach section 's' stop our seach. This prevents two
2796 warning messages from being produced, one for 'section A overlaps
2797 section B' and one for 'section B overlaps section A'. */
2798 for (os
= output_bfd
->sections
; os
!= s
; os
= os
->next
)
2805 /* Only consider loadable sections with real contents. */
2806 if (IGNORE_SECTION (output_bfd
, os
))
2809 /* We must check the sections' LMA addresses not their
2810 VMA addresses because overlay sections can have
2811 overlapping VMAs but they must have distinct LMAs. */
2812 s_start
= bfd_section_lma (output_bfd
, s
);
2813 os_start
= bfd_section_lma (output_bfd
, os
);
2814 s_end
= s_start
+ TO_ADDR (bfd_section_size (output_bfd
, s
)) - 1;
2815 os_end
= os_start
+ TO_ADDR (bfd_section_size (output_bfd
, os
)) - 1;
2817 /* Look for an overlap. */
2818 if ((s_end
< os_start
) || (s_start
> os_end
))
2822 _("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
2823 s
->name
, s_start
, s_end
, os
->name
, os_start
, os_end
);
2825 /* Once we have found one overlap for this section,
2826 stop looking for others. */
2832 /* Make sure the new address is within the region. We explicitly permit the
2833 current address to be at the exact end of the region when the address is
2834 non-zero, in case the region is at the end of addressable memory and the
2835 calculation wraps around. */
2838 os_region_check (lang_output_section_statement_type
*os
,
2839 lang_memory_region_type
*region
,
2843 if ((region
->current
< region
->origin
2844 || (region
->current
- region
->origin
> region
->length
))
2845 && ((region
->current
!= region
->origin
+ region
->length
)
2850 einfo (_("%X%P: address 0x%v of %B section %s is not within region %s\n"),
2852 os
->bfd_section
->owner
,
2853 os
->bfd_section
->name
,
2858 einfo (_("%X%P: region %s is full (%B section %s)\n"),
2860 os
->bfd_section
->owner
,
2861 os
->bfd_section
->name
);
2863 /* Reset the region pointer. */
2864 region
->current
= region
->origin
;
2868 /* Set the sizes for all the output sections. */
2871 lang_size_sections_1
2872 (lang_statement_union_type
*s
,
2873 lang_output_section_statement_type
*output_section_statement
,
2874 lang_statement_union_type
**prev
,
2878 bfd_boolean check_regions
)
2880 /* Size up the sections from their constituent parts. */
2881 for (; s
!= NULL
; s
= s
->header
.next
)
2883 switch (s
->header
.type
)
2885 case lang_output_section_statement_enum
:
2888 lang_output_section_statement_type
*os
;
2890 os
= &s
->output_section_statement
;
2891 if (os
->bfd_section
== NULL
)
2892 /* This section was never actually created. */
2895 /* If this is a COFF shared library section, use the size and
2896 address from the input section. FIXME: This is COFF
2897 specific; it would be cleaner if there were some other way
2898 to do this, but nothing simple comes to mind. */
2899 if ((os
->bfd_section
->flags
& SEC_COFF_SHARED_LIBRARY
) != 0)
2903 if (os
->children
.head
== NULL
2904 || os
->children
.head
->header
.next
!= NULL
2905 || os
->children
.head
->header
.type
!= lang_input_section_enum
)
2906 einfo (_("%P%X: Internal error on COFF shared library section %s\n"),
2909 input
= os
->children
.head
->input_section
.section
;
2910 bfd_set_section_vma (os
->bfd_section
->owner
,
2912 bfd_section_vma (input
->owner
, input
));
2913 os
->bfd_section
->_raw_size
= input
->_raw_size
;
2917 if (bfd_is_abs_section (os
->bfd_section
))
2919 /* No matter what happens, an abs section starts at zero. */
2920 ASSERT (os
->bfd_section
->vma
== 0);
2924 if (os
->addr_tree
== NULL
)
2926 /* No address specified for this section, get one
2927 from the region specification. */
2928 if (os
->region
== NULL
2929 || (((bfd_get_section_flags (output_bfd
, os
->bfd_section
)
2930 & (SEC_ALLOC
| SEC_LOAD
)) != 0)
2931 && os
->region
->name
[0] == '*'
2932 && strcmp (os
->region
->name
, DEFAULT_MEMORY_REGION
) == 0))
2934 os
->region
= lang_memory_default (os
->bfd_section
);
2937 /* If a loadable section is using the default memory
2938 region, and some non default memory regions were
2939 defined, issue an error message. */
2940 if (!IGNORE_SECTION (output_bfd
, os
->bfd_section
)
2941 && ! link_info
.relocatable
2943 && strcmp (os
->region
->name
, DEFAULT_MEMORY_REGION
) == 0
2944 && lang_memory_region_list
!= NULL
2945 && (strcmp (lang_memory_region_list
->name
,
2946 DEFAULT_MEMORY_REGION
) != 0
2947 || lang_memory_region_list
->next
!= NULL
))
2949 /* By default this is an error rather than just a
2950 warning because if we allocate the section to the
2951 default memory region we can end up creating an
2952 excessively large binary, or even seg faulting when
2953 attempting to perform a negative seek. See
2954 http://sources.redhat.com/ml/binutils/2003-04/msg00423.html
2955 for an example of this. This behaviour can be
2956 overridden by the using the --no-check-sections
2958 if (command_line
.check_section_addresses
)
2959 einfo (_("%P%F: error: no memory region specified for loadable section `%s'\n"),
2960 bfd_get_section_name (output_bfd
,
2963 einfo (_("%P: warning: no memory region specified for loadable section `%s'\n"),
2964 bfd_get_section_name (output_bfd
,
2968 dot
= os
->region
->current
;
2970 if (os
->section_alignment
== -1)
2975 dot
= align_power (dot
,
2976 os
->bfd_section
->alignment_power
);
2978 if (dot
!= olddot
&& config
.warn_section_align
)
2979 einfo (_("%P: warning: changing start of section %s by %u bytes\n"),
2980 os
->name
, (unsigned int) (dot
- olddot
));
2988 r
= exp_fold_tree (os
->addr_tree
,
2990 lang_allocating_phase_enum
,
2995 einfo (_("%F%S: non constant or forward reference address expression for section %s\n"),
2998 dot
= r
.value
+ r
.section
->bfd_section
->vma
;
3001 /* The section starts here.
3002 First, align to what the section needs. */
3004 if (os
->section_alignment
!= -1)
3005 dot
= align_power (dot
, os
->section_alignment
);
3007 bfd_set_section_vma (0, os
->bfd_section
, dot
);
3009 os
->bfd_section
->output_offset
= 0;
3012 lang_size_sections_1 (os
->children
.head
, os
, &os
->children
.head
,
3013 os
->fill
, dot
, relax
, check_regions
);
3015 /* Put the section within the requested block size, or
3016 align at the block boundary. */
3017 after
= ((os
->bfd_section
->vma
3018 + TO_ADDR (os
->bfd_section
->_raw_size
)
3019 + os
->block_value
- 1)
3020 & - (bfd_vma
) os
->block_value
);
3022 if (bfd_is_abs_section (os
->bfd_section
))
3023 ASSERT (after
== os
->bfd_section
->vma
);
3024 else if ((os
->bfd_section
->flags
& SEC_HAS_CONTENTS
) == 0
3025 && (os
->bfd_section
->flags
& SEC_THREAD_LOCAL
)
3026 && ! link_info
.relocatable
)
3027 os
->bfd_section
->_raw_size
= 0;
3029 os
->bfd_section
->_raw_size
3030 = TO_SIZE (after
- os
->bfd_section
->vma
);
3032 dot
= os
->bfd_section
->vma
+ TO_ADDR (os
->bfd_section
->_raw_size
);
3035 if (os
->update_dot_tree
!= 0)
3036 exp_fold_tree (os
->update_dot_tree
, abs_output_section
,
3037 lang_allocating_phase_enum
, dot
, &dot
);
3039 /* Update dot in the region ?
3040 We only do this if the section is going to be allocated,
3041 since unallocated sections do not contribute to the region's
3042 overall size in memory.
3044 If the SEC_NEVER_LOAD bit is not set, it will affect the
3045 addresses of sections after it. We have to update
3047 if (os
->region
!= NULL
3048 && ((bfd_get_section_flags (output_bfd
, os
->bfd_section
)
3049 & SEC_NEVER_LOAD
) == 0
3050 || (bfd_get_section_flags (output_bfd
, os
->bfd_section
)
3051 & (SEC_ALLOC
| SEC_LOAD
))))
3053 os
->region
->current
= dot
;
3056 /* Make sure the new address is within the region. */
3057 os_region_check (os
, os
->region
, os
->addr_tree
,
3058 os
->bfd_section
->vma
);
3060 /* If there's no load address specified, use the run
3061 region as the load region. */
3062 if (os
->lma_region
== NULL
&& os
->load_base
== NULL
)
3063 os
->lma_region
= os
->region
;
3065 if (os
->lma_region
!= NULL
&& os
->lma_region
!= os
->region
)
3067 /* Set load_base, which will be handled later. */
3068 os
->load_base
= exp_intop (os
->lma_region
->current
);
3069 os
->lma_region
->current
+=
3070 TO_ADDR (os
->bfd_section
->_raw_size
);
3072 os_region_check (os
, os
->lma_region
, NULL
,
3073 os
->bfd_section
->lma
);
3079 case lang_constructors_statement_enum
:
3080 dot
= lang_size_sections_1 (constructor_list
.head
,
3081 output_section_statement
,
3082 &s
->wild_statement
.children
.head
,
3083 fill
, dot
, relax
, check_regions
);
3086 case lang_data_statement_enum
:
3088 unsigned int size
= 0;
3090 s
->data_statement
.output_vma
=
3091 dot
- output_section_statement
->bfd_section
->vma
;
3092 s
->data_statement
.output_section
=
3093 output_section_statement
->bfd_section
;
3095 /* We might refer to provided symbols in the expression, and
3096 need to mark them as needed. */
3097 exp_fold_tree (s
->data_statement
.exp
, abs_output_section
,
3098 lang_allocating_phase_enum
, dot
, &dot
);
3100 switch (s
->data_statement
.type
)
3118 if (size
< TO_SIZE ((unsigned) 1))
3119 size
= TO_SIZE ((unsigned) 1);
3120 dot
+= TO_ADDR (size
);
3121 output_section_statement
->bfd_section
->_raw_size
+= size
;
3122 /* The output section gets contents, and then we inspect for
3123 any flags set in the input script which override any ALLOC. */
3124 output_section_statement
->bfd_section
->flags
|= SEC_HAS_CONTENTS
;
3125 if (!(output_section_statement
->flags
& SEC_NEVER_LOAD
))
3127 output_section_statement
->bfd_section
->flags
|=
3128 SEC_ALLOC
| SEC_LOAD
;
3133 case lang_reloc_statement_enum
:
3137 s
->reloc_statement
.output_vma
=
3138 dot
- output_section_statement
->bfd_section
->vma
;
3139 s
->reloc_statement
.output_section
=
3140 output_section_statement
->bfd_section
;
3141 size
= bfd_get_reloc_size (s
->reloc_statement
.howto
);
3142 dot
+= TO_ADDR (size
);
3143 output_section_statement
->bfd_section
->_raw_size
+= size
;
3147 case lang_wild_statement_enum
:
3149 dot
= lang_size_sections_1 (s
->wild_statement
.children
.head
,
3150 output_section_statement
,
3151 &s
->wild_statement
.children
.head
,
3152 fill
, dot
, relax
, check_regions
);
3156 case lang_object_symbols_statement_enum
:
3157 link_info
.create_object_symbols_section
=
3158 output_section_statement
->bfd_section
;
3160 case lang_output_statement_enum
:
3161 case lang_target_statement_enum
:
3163 case lang_input_section_enum
:
3167 i
= (*prev
)->input_section
.section
;
3170 if (i
->_cooked_size
== 0)
3171 i
->_cooked_size
= i
->_raw_size
;
3177 if (! bfd_relax_section (i
->owner
, i
, &link_info
, &again
))
3178 einfo (_("%P%F: can't relax section: %E\n"));
3182 dot
= size_input_section (prev
, output_section_statement
,
3183 output_section_statement
->fill
, dot
);
3186 case lang_input_statement_enum
:
3188 case lang_fill_statement_enum
:
3189 s
->fill_statement
.output_section
=
3190 output_section_statement
->bfd_section
;
3192 fill
= s
->fill_statement
.fill
;
3194 case lang_assignment_statement_enum
:
3196 bfd_vma newdot
= dot
;
3198 exp_fold_tree (s
->assignment_statement
.exp
,
3199 output_section_statement
,
3200 lang_allocating_phase_enum
,
3206 if (output_section_statement
== abs_output_section
)
3208 /* If we don't have an output section, then just adjust
3209 the default memory address. */
3210 lang_memory_region_lookup (DEFAULT_MEMORY_REGION
, FALSE
)->current
= newdot
;
3214 /* Insert a pad after this statement. We can't
3215 put the pad before when relaxing, in case the
3216 assignment references dot. */
3217 insert_pad (&s
->header
.next
, fill
, TO_SIZE (newdot
- dot
),
3218 output_section_statement
->bfd_section
, dot
);
3220 /* Don't neuter the pad below when relaxing. */
3224 /* If dot is advanced, this implies that the section should
3225 have space allocated to it, unless the user has explicitly
3226 stated that the section should never be loaded. */
3227 if (!(output_section_statement
->flags
& (SEC_NEVER_LOAD
| SEC_ALLOC
)))
3228 output_section_statement
->bfd_section
->flags
|= SEC_ALLOC
;
3235 case lang_padding_statement_enum
:
3236 /* If this is the first time lang_size_sections is called,
3237 we won't have any padding statements. If this is the
3238 second or later passes when relaxing, we should allow
3239 padding to shrink. If padding is needed on this pass, it
3240 will be added back in. */
3241 s
->padding_statement
.size
= 0;
3243 /* Make sure output_offset is valid. If relaxation shrinks
3244 the section and this pad isn't needed, it's possible to
3245 have output_offset larger than the final size of the
3246 section. bfd_set_section_contents will complain even for
3247 a pad size of zero. */
3248 s
->padding_statement
.output_offset
3249 = dot
- output_section_statement
->bfd_section
->vma
;
3252 case lang_group_statement_enum
:
3253 dot
= lang_size_sections_1 (s
->group_statement
.children
.head
,
3254 output_section_statement
,
3255 &s
->group_statement
.children
.head
,
3256 fill
, dot
, relax
, check_regions
);
3263 /* We can only get here when relaxing is turned on. */
3264 case lang_address_statement_enum
:
3267 prev
= &s
->header
.next
;
3274 (lang_statement_union_type
*s
,
3275 lang_output_section_statement_type
*output_section_statement
,
3276 lang_statement_union_type
**prev
,
3280 bfd_boolean check_regions
)
3285 /* Callers of exp_fold_tree need to increment this. */
3286 lang_statement_iteration
++;
3288 exp_data_seg
.phase
= exp_dataseg_none
;
3289 result
= lang_size_sections_1 (s
, output_section_statement
, prev
, fill
,
3290 dot
, relax
, check_regions
);
3291 if (exp_data_seg
.phase
== exp_dataseg_end_seen
)
3293 /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_END pair was seen, check whether
3294 a page could be saved in the data segment. */
3295 bfd_vma first
, last
;
3297 first
= -exp_data_seg
.base
& (exp_data_seg
.pagesize
- 1);
3298 last
= exp_data_seg
.end
& (exp_data_seg
.pagesize
- 1);
3300 && ((exp_data_seg
.base
& ~(exp_data_seg
.pagesize
- 1))
3301 != (exp_data_seg
.end
& ~(exp_data_seg
.pagesize
- 1)))
3302 && first
+ last
<= exp_data_seg
.pagesize
)
3304 exp_data_seg
.phase
= exp_dataseg_adjust
;
3305 lang_statement_iteration
++;
3306 result
= lang_size_sections_1 (s
, output_section_statement
, prev
,
3307 fill
, dot
, relax
, check_regions
);
3311 /* Some backend relaxers want to refer to the output section size. Give
3312 them a section size that does not change on the next call while they
3313 relax. We can't set this at top because lang_reset_memory_regions
3314 which is called before we get here, sets _raw_size to 0 on relaxing
3316 for (o
= output_bfd
->sections
; o
!= NULL
; o
= o
->next
)
3317 o
->_cooked_size
= o
->_raw_size
;
3322 /* Worker function for lang_do_assignments. Recursiveness goes here. */
3325 lang_do_assignments_1
3326 (lang_statement_union_type
*s
,
3327 lang_output_section_statement_type
*output_section_statement
,
3331 for (; s
!= NULL
; s
= s
->header
.next
)
3333 switch (s
->header
.type
)
3335 case lang_constructors_statement_enum
:
3336 dot
= lang_do_assignments_1 (constructor_list
.head
,
3337 output_section_statement
,
3342 case lang_output_section_statement_enum
:
3344 lang_output_section_statement_type
*os
;
3346 os
= &(s
->output_section_statement
);
3347 if (os
->bfd_section
!= NULL
)
3349 dot
= os
->bfd_section
->vma
;
3350 (void) lang_do_assignments_1 (os
->children
.head
, os
,
3352 dot
= (os
->bfd_section
->vma
3353 + TO_ADDR (os
->bfd_section
->_raw_size
));
3358 /* If nothing has been placed into the output section then
3359 it won't have a bfd_section. */
3360 if (os
->bfd_section
)
3362 os
->bfd_section
->lma
3363 = exp_get_abs_int (os
->load_base
, 0, "load base",
3364 lang_final_phase_enum
);
3369 case lang_wild_statement_enum
:
3371 dot
= lang_do_assignments_1 (s
->wild_statement
.children
.head
,
3372 output_section_statement
,
3377 case lang_object_symbols_statement_enum
:
3378 case lang_output_statement_enum
:
3379 case lang_target_statement_enum
:
3381 case lang_common_statement_enum
:
3384 case lang_data_statement_enum
:
3386 etree_value_type value
;
3388 value
= exp_fold_tree (s
->data_statement
.exp
,
3390 lang_final_phase_enum
, dot
, &dot
);
3392 einfo (_("%F%P: invalid data statement\n"));
3393 s
->data_statement
.value
3394 = value
.value
+ value
.section
->bfd_section
->vma
;
3398 switch (s
->data_statement
.type
)
3416 if (size
< TO_SIZE ((unsigned) 1))
3417 size
= TO_SIZE ((unsigned) 1);
3418 dot
+= TO_ADDR (size
);
3422 case lang_reloc_statement_enum
:
3424 etree_value_type value
;
3426 value
= exp_fold_tree (s
->reloc_statement
.addend_exp
,
3428 lang_final_phase_enum
, dot
, &dot
);
3429 s
->reloc_statement
.addend_value
= value
.value
;
3431 einfo (_("%F%P: invalid reloc statement\n"));
3433 dot
+= TO_ADDR (bfd_get_reloc_size (s
->reloc_statement
.howto
));
3436 case lang_input_section_enum
:
3438 asection
*in
= s
->input_section
.section
;
3440 if (in
->_cooked_size
!= 0)
3441 dot
+= TO_ADDR (in
->_cooked_size
);
3443 dot
+= TO_ADDR (in
->_raw_size
);
3447 case lang_input_statement_enum
:
3449 case lang_fill_statement_enum
:
3450 fill
= s
->fill_statement
.fill
;
3452 case lang_assignment_statement_enum
:
3454 exp_fold_tree (s
->assignment_statement
.exp
,
3455 output_section_statement
,
3456 lang_final_phase_enum
,
3462 case lang_padding_statement_enum
:
3463 dot
+= TO_ADDR (s
->padding_statement
.size
);
3466 case lang_group_statement_enum
:
3467 dot
= lang_do_assignments_1 (s
->group_statement
.children
.head
,
3468 output_section_statement
,
3476 case lang_address_statement_enum
:
3485 lang_do_assignments (lang_statement_union_type
*s
,
3486 lang_output_section_statement_type
*output_section_statement
,
3490 /* Callers of exp_fold_tree need to increment this. */
3491 lang_statement_iteration
++;
3492 lang_do_assignments_1 (s
, output_section_statement
, fill
, dot
);
3495 /* Fix any .startof. or .sizeof. symbols. When the assemblers see the
3496 operator .startof. (section_name), it produces an undefined symbol
3497 .startof.section_name. Similarly, when it sees
3498 .sizeof. (section_name), it produces an undefined symbol
3499 .sizeof.section_name. For all the output sections, we look for
3500 such symbols, and set them to the correct value. */
3503 lang_set_startof (void)
3507 if (link_info
.relocatable
)
3510 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
3512 const char *secname
;
3514 struct bfd_link_hash_entry
*h
;
3516 secname
= bfd_get_section_name (output_bfd
, s
);
3517 buf
= xmalloc (10 + strlen (secname
));
3519 sprintf (buf
, ".startof.%s", secname
);
3520 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
3521 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
3523 h
->type
= bfd_link_hash_defined
;
3524 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, s
);
3525 h
->u
.def
.section
= bfd_abs_section_ptr
;
3528 sprintf (buf
, ".sizeof.%s", secname
);
3529 h
= bfd_link_hash_lookup (link_info
.hash
, buf
, FALSE
, FALSE
, TRUE
);
3530 if (h
!= NULL
&& h
->type
== bfd_link_hash_undefined
)
3532 h
->type
= bfd_link_hash_defined
;
3533 if (s
->_cooked_size
!= 0)
3534 h
->u
.def
.value
= TO_ADDR (s
->_cooked_size
);
3536 h
->u
.def
.value
= TO_ADDR (s
->_raw_size
);
3537 h
->u
.def
.section
= bfd_abs_section_ptr
;
3547 struct bfd_link_hash_entry
*h
;
3550 if (link_info
.relocatable
|| link_info
.shared
)
3555 if (entry_symbol
.name
== NULL
)
3557 /* No entry has been specified. Look for start, but don't warn
3558 if we don't find it. */
3559 entry_symbol
.name
= "start";
3563 h
= bfd_link_hash_lookup (link_info
.hash
, entry_symbol
.name
,
3564 FALSE
, FALSE
, TRUE
);
3566 && (h
->type
== bfd_link_hash_defined
3567 || h
->type
== bfd_link_hash_defweak
)
3568 && h
->u
.def
.section
->output_section
!= NULL
)
3572 val
= (h
->u
.def
.value
3573 + bfd_get_section_vma (output_bfd
,
3574 h
->u
.def
.section
->output_section
)
3575 + h
->u
.def
.section
->output_offset
);
3576 if (! bfd_set_start_address (output_bfd
, val
))
3577 einfo (_("%P%F:%s: can't set start address\n"), entry_symbol
.name
);
3584 /* We couldn't find the entry symbol. Try parsing it as a
3586 val
= bfd_scan_vma (entry_symbol
.name
, &send
, 0);
3589 if (! bfd_set_start_address (output_bfd
, val
))
3590 einfo (_("%P%F: can't set start address\n"));
3596 /* Can't find the entry symbol, and it's not a number. Use
3597 the first address in the text section. */
3598 ts
= bfd_get_section_by_name (output_bfd
, entry_section
);
3602 einfo (_("%P: warning: cannot find entry symbol %s; defaulting to %V\n"),
3604 bfd_get_section_vma (output_bfd
, ts
));
3605 if (! bfd_set_start_address (output_bfd
,
3606 bfd_get_section_vma (output_bfd
,
3608 einfo (_("%P%F: can't set start address\n"));
3613 einfo (_("%P: warning: cannot find entry symbol %s; not setting start address\n"),
3619 bfd_hash_table_free (&lang_definedness_table
);
3622 /* This is a small function used when we want to ignore errors from
3626 ignore_bfd_errors (const char *s ATTRIBUTE_UNUSED
, ...)
3628 /* Don't do anything. */
3631 /* Check that the architecture of all the input files is compatible
3632 with the output file. Also call the backend to let it do any
3633 other checking that is needed. */
3638 lang_statement_union_type
*file
;
3640 const bfd_arch_info_type
*compatible
;
3642 for (file
= file_chain
.head
; file
!= NULL
; file
= file
->input_statement
.next
)
3644 input_bfd
= file
->input_statement
.the_bfd
;
3645 compatible
= bfd_arch_get_compatible (input_bfd
, output_bfd
,
3646 command_line
.accept_unknown_input_arch
);
3648 /* In general it is not possible to perform a relocatable
3649 link between differing object formats when the input
3650 file has relocations, because the relocations in the
3651 input format may not have equivalent representations in
3652 the output format (and besides BFD does not translate
3653 relocs for other link purposes than a final link). */
3654 if ((link_info
.relocatable
|| link_info
.emitrelocations
)
3655 && (compatible
== NULL
3656 || bfd_get_flavour (input_bfd
) != bfd_get_flavour (output_bfd
))
3657 && (bfd_get_file_flags (input_bfd
) & HAS_RELOC
) != 0)
3659 einfo (_("%P%F: Relocatable linking with relocations from format %s (%B) to format %s (%B) is not supported\n"),
3660 bfd_get_target (input_bfd
), input_bfd
,
3661 bfd_get_target (output_bfd
), output_bfd
);
3662 /* einfo with %F exits. */
3665 if (compatible
== NULL
)
3667 if (command_line
.warn_mismatch
)
3668 einfo (_("%P: warning: %s architecture of input file `%B' is incompatible with %s output\n"),
3669 bfd_printable_name (input_bfd
), input_bfd
,
3670 bfd_printable_name (output_bfd
));
3672 else if (bfd_count_sections (input_bfd
))
3674 /* If the input bfd has no contents, it shouldn't set the
3675 private data of the output bfd. */
3677 bfd_error_handler_type pfn
= NULL
;
3679 /* If we aren't supposed to warn about mismatched input
3680 files, temporarily set the BFD error handler to a
3681 function which will do nothing. We still want to call
3682 bfd_merge_private_bfd_data, since it may set up
3683 information which is needed in the output file. */
3684 if (! command_line
.warn_mismatch
)
3685 pfn
= bfd_set_error_handler (ignore_bfd_errors
);
3686 if (! bfd_merge_private_bfd_data (input_bfd
, output_bfd
))
3688 if (command_line
.warn_mismatch
)
3689 einfo (_("%E%X: failed to merge target specific data of file %B\n"),
3692 if (! command_line
.warn_mismatch
)
3693 bfd_set_error_handler (pfn
);
3698 /* Look through all the global common symbols and attach them to the
3699 correct section. The -sort-common command line switch may be used
3700 to roughly sort the entries by size. */
3705 if (command_line
.inhibit_common_definition
)
3707 if (link_info
.relocatable
3708 && ! command_line
.force_common_definition
)
3711 if (! config
.sort_common
)
3712 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, NULL
);
3717 for (power
= 4; power
>= 0; power
--)
3718 bfd_link_hash_traverse (link_info
.hash
, lang_one_common
, &power
);
3722 /* Place one common symbol in the correct section. */
3725 lang_one_common (struct bfd_link_hash_entry
*h
, void *info
)
3727 unsigned int power_of_two
;
3731 if (h
->type
!= bfd_link_hash_common
)
3735 power_of_two
= h
->u
.c
.p
->alignment_power
;
3737 if (config
.sort_common
3738 && power_of_two
< (unsigned int) *(int *) info
)
3741 section
= h
->u
.c
.p
->section
;
3743 /* Increase the size of the section to align the common sym. */
3744 section
->_cooked_size
+= ((bfd_vma
) 1 << (power_of_two
+ opb_shift
)) - 1;
3745 section
->_cooked_size
&= (- (bfd_vma
) 1 << (power_of_two
+ opb_shift
));
3747 /* Adjust the alignment if necessary. */
3748 if (power_of_two
> section
->alignment_power
)
3749 section
->alignment_power
= power_of_two
;
3751 /* Change the symbol from common to defined. */
3752 h
->type
= bfd_link_hash_defined
;
3753 h
->u
.def
.section
= section
;
3754 h
->u
.def
.value
= section
->_cooked_size
;
3756 /* Increase the size of the section. */
3757 section
->_cooked_size
+= size
;
3759 /* Make sure the section is allocated in memory, and make sure that
3760 it is no longer a common section. */
3761 section
->flags
|= SEC_ALLOC
;
3762 section
->flags
&= ~SEC_IS_COMMON
;
3764 if (config
.map_file
!= NULL
)
3766 static bfd_boolean header_printed
;
3771 if (! header_printed
)
3773 minfo (_("\nAllocating common symbols\n"));
3774 minfo (_("Common symbol size file\n\n"));
3775 header_printed
= TRUE
;
3778 name
= demangle (h
->root
.string
);
3780 len
= strlen (name
);
3795 if (size
<= 0xffffffff)
3796 sprintf (buf
, "%lx", (unsigned long) size
);
3798 sprintf_vma (buf
, size
);
3808 minfo ("%B\n", section
->owner
);
3814 /* Run through the input files and ensure that every input section has
3815 somewhere to go. If one is found without a destination then create
3816 an input request and place it into the statement tree. */
3819 lang_place_orphans (void)
3821 LANG_FOR_EACH_INPUT_STATEMENT (file
)
3825 for (s
= file
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
3827 if (s
->output_section
== NULL
)
3829 /* This section of the file is not attached, root
3830 around for a sensible place for it to go. */
3832 if (file
->just_syms_flag
)
3836 else if (strcmp (s
->name
, "COMMON") == 0)
3838 /* This is a lonely common section which must have
3839 come from an archive. We attach to the section
3840 with the wildcard. */
3841 if (! link_info
.relocatable
3842 || command_line
.force_common_definition
)
3844 if (default_common_section
== NULL
)
3847 /* This message happens when using the
3848 svr3.ifile linker script, so I have
3850 info_msg (_("%P: no [COMMON] command, defaulting to .bss\n"));
3852 default_common_section
=
3853 lang_output_section_statement_lookup (".bss");
3856 lang_add_section (&default_common_section
->children
, s
,
3857 default_common_section
, file
);
3860 else if (ldemul_place_orphan (file
, s
))
3864 lang_output_section_statement_type
*os
;
3866 os
= lang_output_section_statement_lookup (s
->name
);
3867 lang_add_section (&os
->children
, s
, os
, file
);
3875 lang_set_flags (lang_memory_region_type
*ptr
, const char *flags
, int invert
)
3877 flagword
*ptr_flags
;
3879 ptr_flags
= invert
? &ptr
->not_flags
: &ptr
->flags
;
3885 *ptr_flags
|= SEC_ALLOC
;
3889 *ptr_flags
|= SEC_READONLY
;
3893 *ptr_flags
|= SEC_DATA
;
3897 *ptr_flags
|= SEC_CODE
;
3902 *ptr_flags
|= SEC_LOAD
;
3906 einfo (_("%P%F: invalid syntax in flags\n"));
3913 /* Call a function on each input file. This function will be called
3914 on an archive, but not on the elements. */
3917 lang_for_each_input_file (void (*func
) (lang_input_statement_type
*))
3919 lang_input_statement_type
*f
;
3921 for (f
= (lang_input_statement_type
*) input_file_chain
.head
;
3923 f
= (lang_input_statement_type
*) f
->next_real_file
)
3927 /* Call a function on each file. The function will be called on all
3928 the elements of an archive which are included in the link, but will
3929 not be called on the archive file itself. */
3932 lang_for_each_file (void (*func
) (lang_input_statement_type
*))
3934 LANG_FOR_EACH_INPUT_STATEMENT (f
)
3945 lang_for_each_input_section (void (*func
) (bfd
*ab
, asection
*as
))
3947 LANG_FOR_EACH_INPUT_STATEMENT (f
)
3951 for (s
= f
->the_bfd
->sections
; s
!= NULL
; s
= s
->next
)
3952 func (f
->the_bfd
, s
);
3959 ldlang_add_file (lang_input_statement_type
*entry
)
3963 lang_statement_append (&file_chain
,
3964 (lang_statement_union_type
*) entry
,
3967 /* The BFD linker needs to have a list of all input BFDs involved in
3969 ASSERT (entry
->the_bfd
->link_next
== NULL
);
3970 ASSERT (entry
->the_bfd
!= output_bfd
);
3971 for (pp
= &link_info
.input_bfds
; *pp
!= NULL
; pp
= &(*pp
)->link_next
)
3973 *pp
= entry
->the_bfd
;
3974 entry
->the_bfd
->usrdata
= entry
;
3975 bfd_set_gp_size (entry
->the_bfd
, g_switch_value
);
3977 /* Look through the sections and check for any which should not be
3978 included in the link. We need to do this now, so that we can
3979 notice when the backend linker tries to report multiple
3980 definition errors for symbols which are in sections we aren't
3981 going to link. FIXME: It might be better to entirely ignore
3982 symbols which are defined in sections which are going to be
3983 discarded. This would require modifying the backend linker for
3984 each backend which might set the SEC_LINK_ONCE flag. If we do
3985 this, we should probably handle SEC_EXCLUDE in the same way. */
3987 bfd_map_over_sections (entry
->the_bfd
, section_already_linked
, entry
);
3991 lang_add_output (const char *name
, int from_script
)
3993 /* Make -o on command line override OUTPUT in script. */
3994 if (!had_output_filename
|| !from_script
)
3996 output_filename
= name
;
3997 had_output_filename
= TRUE
;
4001 static lang_output_section_statement_type
*current_section
;
4012 for (l
= 0; l
< 32; l
++)
4014 if (i
>= (unsigned int) x
)
4022 lang_output_section_statement_type
*
4023 lang_enter_output_section_statement (const char *output_section_statement_name
,
4024 etree_type
*address_exp
,
4025 enum section_type sectype
,
4027 etree_type
*subalign
,
4030 lang_output_section_statement_type
*os
;
4034 lang_output_section_statement_lookup (output_section_statement_name
);
4036 /* Add this statement to tree. */
4038 add_statement (lang_output_section_statement_enum
,
4039 output_section_statement
);
4041 /* Make next things chain into subchain of this. */
4043 if (os
->addr_tree
== NULL
)
4045 os
->addr_tree
= address_exp
;
4047 os
->sectype
= sectype
;
4048 if (sectype
!= noload_section
)
4049 os
->flags
= SEC_NO_FLAGS
;
4051 os
->flags
= SEC_NEVER_LOAD
;
4052 os
->block_value
= 1;
4053 stat_ptr
= &os
->children
;
4055 os
->subsection_alignment
=
4056 topower (exp_get_value_int (subalign
, -1, "subsection alignment", 0));
4057 os
->section_alignment
=
4058 topower (exp_get_value_int (align
, -1, "section alignment", 0));
4060 os
->load_base
= ebase
;
4067 lang_output_statement_type
*new =
4068 new_stat (lang_output_statement
, stat_ptr
);
4070 new->name
= output_filename
;
4073 /* Reset the current counters in the regions. */
4076 lang_reset_memory_regions (void)
4078 lang_memory_region_type
*p
= lang_memory_region_list
;
4081 for (p
= lang_memory_region_list
; p
!= NULL
; p
= p
->next
)
4083 p
->old_length
= (bfd_size_type
) (p
->current
- p
->origin
);
4084 p
->current
= p
->origin
;
4087 for (o
= output_bfd
->sections
; o
!= NULL
; o
= o
->next
)
4091 /* If the wild pattern was marked KEEP, the member sections
4092 should be as well. */
4095 gc_section_callback (lang_wild_statement_type
*ptr
,
4096 struct wildcard_list
*sec ATTRIBUTE_UNUSED
,
4098 lang_input_statement_type
*file ATTRIBUTE_UNUSED
,
4099 void *data ATTRIBUTE_UNUSED
)
4101 if (ptr
->keep_sections
)
4102 section
->flags
|= SEC_KEEP
;
4105 /* Handle a wild statement, marking it against GC. */
4108 lang_gc_wild (lang_wild_statement_type
*s
)
4110 walk_wild (s
, gc_section_callback
, NULL
);
4113 /* Iterate over sections marking them against GC. */
4116 lang_gc_sections_1 (lang_statement_union_type
*s
)
4118 for (; s
!= NULL
; s
= s
->header
.next
)
4120 switch (s
->header
.type
)
4122 case lang_wild_statement_enum
:
4123 lang_gc_wild (&s
->wild_statement
);
4125 case lang_constructors_statement_enum
:
4126 lang_gc_sections_1 (constructor_list
.head
);
4128 case lang_output_section_statement_enum
:
4129 lang_gc_sections_1 (s
->output_section_statement
.children
.head
);
4131 case lang_group_statement_enum
:
4132 lang_gc_sections_1 (s
->group_statement
.children
.head
);
4141 lang_gc_sections (void)
4143 struct bfd_link_hash_entry
*h
;
4144 ldlang_undef_chain_list_type
*ulist
;
4146 /* Keep all sections so marked in the link script. */
4148 lang_gc_sections_1 (statement_list
.head
);
4150 /* Keep all sections containing symbols undefined on the command-line,
4151 and the section containing the entry symbol. */
4153 for (ulist
= link_info
.gc_sym_list
; ulist
; ulist
= ulist
->next
)
4155 h
= bfd_link_hash_lookup (link_info
.hash
, ulist
->name
,
4156 FALSE
, FALSE
, FALSE
);
4159 && (h
->type
== bfd_link_hash_defined
4160 || h
->type
== bfd_link_hash_defweak
)
4161 && ! bfd_is_abs_section (h
->u
.def
.section
))
4163 h
->u
.def
.section
->flags
|= SEC_KEEP
;
4167 bfd_gc_sections (output_bfd
, &link_info
);
4173 lang_reasonable_defaults ();
4174 current_target
= default_target
;
4176 /* Open the output file. */
4177 lang_for_each_statement (ldlang_open_output
);
4180 ldemul_create_output_section_statements ();
4182 /* Add to the hash table all undefineds on the command line. */
4183 lang_place_undefineds ();
4185 already_linked_table_init ();
4187 /* Create a bfd for each input file. */
4188 current_target
= default_target
;
4189 open_input_bfds (statement_list
.head
, FALSE
);
4191 link_info
.gc_sym_list
= &entry_symbol
;
4192 if (entry_symbol
.name
== NULL
)
4193 link_info
.gc_sym_list
= ldlang_undef_chain_list_head
;
4195 ldemul_after_open ();
4197 already_linked_table_free ();
4199 /* Make sure that we're not mixing architectures. We call this
4200 after all the input files have been opened, but before we do any
4201 other processing, so that any operations merge_private_bfd_data
4202 does on the output file will be known during the rest of the
4206 /* Handle .exports instead of a version script if we're told to do so. */
4207 if (command_line
.version_exports_section
)
4208 lang_do_version_exports_section ();
4210 /* Build all sets based on the information gathered from the input
4212 ldctor_build_sets ();
4214 /* Remove unreferenced sections if asked to. */
4215 if (command_line
.gc_sections
)
4216 lang_gc_sections ();
4218 /* If there were any SEC_MERGE sections, finish their merging, so that
4219 section sizes can be computed. This has to be done after GC of sections,
4220 so that GCed sections are not merged, but before assigning output
4221 sections, since removing whole input sections is hard then. */
4222 bfd_merge_sections (output_bfd
, &link_info
);
4224 /* Size up the common data. */
4227 /* Run through the contours of the script and attach input sections
4228 to the correct output sections. */
4229 map_input_to_output_sections (statement_list
.head
, NULL
, NULL
);
4231 /* Find any sections not attached explicitly and handle them. */
4232 lang_place_orphans ();
4234 if (! link_info
.relocatable
)
4236 /* Look for a text section and set the readonly attribute in it. */
4237 asection
*found
= bfd_get_section_by_name (output_bfd
, ".text");
4241 if (config
.text_read_only
)
4242 found
->flags
|= SEC_READONLY
;
4244 found
->flags
&= ~SEC_READONLY
;
4248 /* Do anything special before sizing sections. This is where ELF
4249 and other back-ends size dynamic sections. */
4250 ldemul_before_allocation ();
4252 if (!link_info
.relocatable
)
4253 strip_excluded_output_sections ();
4255 /* We must record the program headers before we try to fix the
4256 section positions, since they will affect SIZEOF_HEADERS. */
4257 lang_record_phdrs ();
4259 /* Size up the sections. */
4260 lang_size_sections (statement_list
.head
, abs_output_section
,
4261 &statement_list
.head
, 0, 0, NULL
,
4262 command_line
.relax
? FALSE
: TRUE
);
4264 /* Now run around and relax if we can. */
4265 if (command_line
.relax
)
4267 /* Keep relaxing until bfd_relax_section gives up. */
4268 bfd_boolean relax_again
;
4272 relax_again
= FALSE
;
4274 /* Note: pe-dll.c does something like this also. If you find
4275 you need to change this code, you probably need to change
4276 pe-dll.c also. DJ */
4278 /* Do all the assignments with our current guesses as to
4280 lang_do_assignments (statement_list
.head
, abs_output_section
,
4283 /* We must do this after lang_do_assignments, because it uses
4285 lang_reset_memory_regions ();
4287 /* Perform another relax pass - this time we know where the
4288 globals are, so can make a better guess. */
4289 lang_size_sections (statement_list
.head
, abs_output_section
,
4290 &statement_list
.head
, 0, 0, &relax_again
, FALSE
);
4292 /* If the normal relax is done and the relax finalize pass
4293 is not performed yet, we perform another relax pass. */
4294 if (!relax_again
&& link_info
.need_relax_finalize
)
4296 link_info
.need_relax_finalize
= FALSE
;
4300 while (relax_again
);
4302 /* Final extra sizing to report errors. */
4303 lang_do_assignments (statement_list
.head
, abs_output_section
, NULL
, 0);
4304 lang_reset_memory_regions ();
4305 lang_size_sections (statement_list
.head
, abs_output_section
,
4306 &statement_list
.head
, 0, 0, NULL
, TRUE
);
4309 /* See if anything special should be done now we know how big
4311 ldemul_after_allocation ();
4313 /* Fix any .startof. or .sizeof. symbols. */
4314 lang_set_startof ();
4316 /* Do all the assignments, now that we know the final resting places
4317 of all the symbols. */
4319 lang_do_assignments (statement_list
.head
, abs_output_section
, NULL
, 0);
4321 /* Make sure that the section addresses make sense. */
4322 if (! link_info
.relocatable
4323 && command_line
.check_section_addresses
)
4324 lang_check_section_addresses ();
4332 /* EXPORTED TO YACC */
4335 lang_add_wild (struct wildcard_spec
*filespec
,
4336 struct wildcard_list
*section_list
,
4337 bfd_boolean keep_sections
)
4339 struct wildcard_list
*curr
, *next
;
4340 lang_wild_statement_type
*new;
4342 /* Reverse the list as the parser puts it back to front. */
4343 for (curr
= section_list
, section_list
= NULL
;
4345 section_list
= curr
, curr
= next
)
4347 if (curr
->spec
.name
!= NULL
&& strcmp (curr
->spec
.name
, "COMMON") == 0)
4348 placed_commons
= TRUE
;
4351 curr
->next
= section_list
;
4354 if (filespec
!= NULL
&& filespec
->name
!= NULL
)
4356 if (strcmp (filespec
->name
, "*") == 0)
4357 filespec
->name
= NULL
;
4358 else if (! wildcardp (filespec
->name
))
4359 lang_has_input_file
= TRUE
;
4362 new = new_stat (lang_wild_statement
, stat_ptr
);
4363 new->filename
= NULL
;
4364 new->filenames_sorted
= FALSE
;
4365 if (filespec
!= NULL
)
4367 new->filename
= filespec
->name
;
4368 new->filenames_sorted
= filespec
->sorted
;
4370 new->section_list
= section_list
;
4371 new->keep_sections
= keep_sections
;
4372 lang_list_init (&new->children
);
4376 lang_section_start (const char *name
, etree_type
*address
)
4378 lang_address_statement_type
*ad
;
4380 ad
= new_stat (lang_address_statement
, stat_ptr
);
4381 ad
->section_name
= name
;
4382 ad
->address
= address
;
4385 /* Set the start symbol to NAME. CMDLINE is nonzero if this is called
4386 because of a -e argument on the command line, or zero if this is
4387 called by ENTRY in a linker script. Command line arguments take
4391 lang_add_entry (const char *name
, bfd_boolean cmdline
)
4393 if (entry_symbol
.name
== NULL
4395 || ! entry_from_cmdline
)
4397 entry_symbol
.name
= name
;
4398 entry_from_cmdline
= cmdline
;
4403 lang_add_target (const char *name
)
4405 lang_target_statement_type
*new = new_stat (lang_target_statement
,
4413 lang_add_map (const char *name
)
4420 map_option_f
= TRUE
;
4428 lang_add_fill (fill_type
*fill
)
4430 lang_fill_statement_type
*new = new_stat (lang_fill_statement
,
4437 lang_add_data (int type
, union etree_union
*exp
)
4440 lang_data_statement_type
*new = new_stat (lang_data_statement
,
4448 /* Create a new reloc statement. RELOC is the BFD relocation type to
4449 generate. HOWTO is the corresponding howto structure (we could
4450 look this up, but the caller has already done so). SECTION is the
4451 section to generate a reloc against, or NAME is the name of the
4452 symbol to generate a reloc against. Exactly one of SECTION and
4453 NAME must be NULL. ADDEND is an expression for the addend. */
4456 lang_add_reloc (bfd_reloc_code_real_type reloc
,
4457 reloc_howto_type
*howto
,
4460 union etree_union
*addend
)
4462 lang_reloc_statement_type
*p
= new_stat (lang_reloc_statement
, stat_ptr
);
4466 p
->section
= section
;
4468 p
->addend_exp
= addend
;
4470 p
->addend_value
= 0;
4471 p
->output_section
= NULL
;
4475 lang_assignment_statement_type
*
4476 lang_add_assignment (etree_type
*exp
)
4478 lang_assignment_statement_type
*new = new_stat (lang_assignment_statement
,
4486 lang_add_attribute (enum statement_enum attribute
)
4488 new_statement (attribute
, sizeof (lang_statement_union_type
), stat_ptr
);
4492 lang_startup (const char *name
)
4494 if (startup_file
!= NULL
)
4496 einfo (_("%P%Fmultiple STARTUP files\n"));
4498 first_file
->filename
= name
;
4499 first_file
->local_sym_name
= name
;
4500 first_file
->real
= TRUE
;
4502 startup_file
= name
;
4506 lang_float (bfd_boolean maybe
)
4508 lang_float_flag
= maybe
;
4512 /* Work out the load- and run-time regions from a script statement, and
4513 store them in *LMA_REGION and *REGION respectively.
4515 MEMSPEC is the name of the run-time region, or the value of
4516 DEFAULT_MEMORY_REGION if the statement didn't specify one.
4517 LMA_MEMSPEC is the name of the load-time region, or null if the
4518 statement didn't specify one.HAVE_LMA_P is TRUE if the statement
4519 had an explicit load address.
4521 It is an error to specify both a load region and a load address. */
4524 lang_get_regions (lang_memory_region_type
**region
,
4525 lang_memory_region_type
**lma_region
,
4526 const char *memspec
,
4527 const char *lma_memspec
,
4528 bfd_boolean have_lma
,
4529 bfd_boolean have_vma
)
4531 *lma_region
= lang_memory_region_lookup (lma_memspec
, FALSE
);
4533 /* If no runtime region or VMA has been specified, but the load region has
4534 been specified, then use the load region for the runtime region as well. */
4535 if (lma_memspec
!= NULL
4537 && strcmp (memspec
, DEFAULT_MEMORY_REGION
) == 0)
4538 *region
= *lma_region
;
4540 *region
= lang_memory_region_lookup (memspec
, FALSE
);
4542 if (have_lma
&& lma_memspec
!= 0)
4543 einfo (_("%X%P:%S: section has both a load address and a load region\n"));
4547 lang_leave_output_section_statement (fill_type
*fill
, const char *memspec
,
4548 lang_output_section_phdr_list
*phdrs
,
4549 const char *lma_memspec
)
4551 lang_get_regions (¤t_section
->region
,
4552 ¤t_section
->lma_region
,
4553 memspec
, lma_memspec
,
4554 current_section
->load_base
!= NULL
,
4555 current_section
->addr_tree
!= NULL
);
4556 current_section
->fill
= fill
;
4557 current_section
->phdrs
= phdrs
;
4558 stat_ptr
= &statement_list
;
4561 /* Create an absolute symbol with the given name with the value of the
4562 address of first byte of the section named.
4564 If the symbol already exists, then do nothing. */
4567 lang_abs_symbol_at_beginning_of (const char *secname
, const char *name
)
4569 struct bfd_link_hash_entry
*h
;
4571 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
4573 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4575 if (h
->type
== bfd_link_hash_new
4576 || h
->type
== bfd_link_hash_undefined
)
4580 h
->type
= bfd_link_hash_defined
;
4582 sec
= bfd_get_section_by_name (output_bfd
, secname
);
4586 h
->u
.def
.value
= bfd_get_section_vma (output_bfd
, sec
);
4588 h
->u
.def
.section
= bfd_abs_section_ptr
;
4592 /* Create an absolute symbol with the given name with the value of the
4593 address of the first byte after the end of the section named.
4595 If the symbol already exists, then do nothing. */
4598 lang_abs_symbol_at_end_of (const char *secname
, const char *name
)
4600 struct bfd_link_hash_entry
*h
;
4602 h
= bfd_link_hash_lookup (link_info
.hash
, name
, TRUE
, TRUE
, TRUE
);
4604 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
4606 if (h
->type
== bfd_link_hash_new
4607 || h
->type
== bfd_link_hash_undefined
)
4611 h
->type
= bfd_link_hash_defined
;
4613 sec
= bfd_get_section_by_name (output_bfd
, secname
);
4617 h
->u
.def
.value
= (bfd_get_section_vma (output_bfd
, sec
)
4618 + TO_ADDR (bfd_section_size (output_bfd
, sec
)));
4620 h
->u
.def
.section
= bfd_abs_section_ptr
;
4625 lang_statement_append (lang_statement_list_type
*list
,
4626 lang_statement_union_type
*element
,
4627 lang_statement_union_type
**field
)
4629 *(list
->tail
) = element
;
4633 /* Set the output format type. -oformat overrides scripts. */
4636 lang_add_output_format (const char *format
,
4641 if (output_target
== NULL
|| !from_script
)
4643 if (command_line
.endian
== ENDIAN_BIG
4646 else if (command_line
.endian
== ENDIAN_LITTLE
4650 output_target
= format
;
4654 /* Enter a group. This creates a new lang_group_statement, and sets
4655 stat_ptr to build new statements within the group. */
4658 lang_enter_group (void)
4660 lang_group_statement_type
*g
;
4662 g
= new_stat (lang_group_statement
, stat_ptr
);
4663 lang_list_init (&g
->children
);
4664 stat_ptr
= &g
->children
;
4667 /* Leave a group. This just resets stat_ptr to start writing to the
4668 regular list of statements again. Note that this will not work if
4669 groups can occur inside anything else which can adjust stat_ptr,
4670 but currently they can't. */
4673 lang_leave_group (void)
4675 stat_ptr
= &statement_list
;
4678 /* Add a new program header. This is called for each entry in a PHDRS
4679 command in a linker script. */
4682 lang_new_phdr (const char *name
,
4684 bfd_boolean filehdr
,
4689 struct lang_phdr
*n
, **pp
;
4691 n
= stat_alloc (sizeof (struct lang_phdr
));
4694 n
->type
= exp_get_value_int (type
, 0, "program header type",
4695 lang_final_phase_enum
);
4696 n
->filehdr
= filehdr
;
4701 for (pp
= &lang_phdr_list
; *pp
!= NULL
; pp
= &(*pp
)->next
)
4706 /* Record the program header information in the output BFD. FIXME: We
4707 should not be calling an ELF specific function here. */
4710 lang_record_phdrs (void)
4714 lang_output_section_phdr_list
*last
;
4715 struct lang_phdr
*l
;
4716 lang_statement_union_type
*u
;
4719 secs
= xmalloc (alc
* sizeof (asection
*));
4721 for (l
= lang_phdr_list
; l
!= NULL
; l
= l
->next
)
4728 for (u
= lang_output_section_statement
.head
;
4730 u
= u
->output_section_statement
.next
)
4732 lang_output_section_statement_type
*os
;
4733 lang_output_section_phdr_list
*pl
;
4735 os
= &u
->output_section_statement
;
4742 if (os
->sectype
== noload_section
4743 || os
->bfd_section
== NULL
4744 || (os
->bfd_section
->flags
& SEC_ALLOC
) == 0)
4749 if (os
->bfd_section
== NULL
)
4752 for (; pl
!= NULL
; pl
= pl
->next
)
4754 if (strcmp (pl
->name
, l
->name
) == 0)
4759 secs
= xrealloc (secs
, alc
* sizeof (asection
*));
4761 secs
[c
] = os
->bfd_section
;
4768 if (l
->flags
== NULL
)
4771 flags
= exp_get_vma (l
->flags
, 0, "phdr flags",
4772 lang_final_phase_enum
);
4777 at
= exp_get_vma (l
->at
, 0, "phdr load address",
4778 lang_final_phase_enum
);
4780 if (! bfd_record_phdr (output_bfd
, l
->type
,
4781 l
->flags
!= NULL
, flags
, l
->at
!= NULL
,
4782 at
, l
->filehdr
, l
->phdrs
, c
, secs
))
4783 einfo (_("%F%P: bfd_record_phdr failed: %E\n"));
4788 /* Make sure all the phdr assignments succeeded. */
4789 for (u
= lang_output_section_statement
.head
;
4791 u
= u
->output_section_statement
.next
)
4793 lang_output_section_phdr_list
*pl
;
4795 if (u
->output_section_statement
.bfd_section
== NULL
)
4798 for (pl
= u
->output_section_statement
.phdrs
;
4801 if (! pl
->used
&& strcmp (pl
->name
, "NONE") != 0)
4802 einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"),
4803 u
->output_section_statement
.name
, pl
->name
);
4807 /* Record a list of sections which may not be cross referenced. */
4810 lang_add_nocrossref (lang_nocrossref_type
*l
)
4812 struct lang_nocrossrefs
*n
;
4814 n
= xmalloc (sizeof *n
);
4815 n
->next
= nocrossref_list
;
4817 nocrossref_list
= n
;
4819 /* Set notice_all so that we get informed about all symbols. */
4820 link_info
.notice_all
= TRUE
;
4823 /* Overlay handling. We handle overlays with some static variables. */
4825 /* The overlay virtual address. */
4826 static etree_type
*overlay_vma
;
4827 /* And subsection alignment. */
4828 static etree_type
*overlay_subalign
;
4830 /* An expression for the maximum section size seen so far. */
4831 static etree_type
*overlay_max
;
4833 /* A list of all the sections in this overlay. */
4835 struct overlay_list
{
4836 struct overlay_list
*next
;
4837 lang_output_section_statement_type
*os
;
4840 static struct overlay_list
*overlay_list
;
4842 /* Start handling an overlay. */
4845 lang_enter_overlay (etree_type
*vma_expr
, etree_type
*subalign
)
4847 /* The grammar should prevent nested overlays from occurring. */
4848 ASSERT (overlay_vma
== NULL
4849 && overlay_subalign
== NULL
4850 && overlay_max
== NULL
);
4852 overlay_vma
= vma_expr
;
4853 overlay_subalign
= subalign
;
4856 /* Start a section in an overlay. We handle this by calling
4857 lang_enter_output_section_statement with the correct VMA.
4858 lang_leave_overlay sets up the LMA and memory regions. */
4861 lang_enter_overlay_section (const char *name
)
4863 struct overlay_list
*n
;
4866 lang_enter_output_section_statement (name
, overlay_vma
, normal_section
,
4867 0, overlay_subalign
, 0);
4869 /* If this is the first section, then base the VMA of future
4870 sections on this one. This will work correctly even if `.' is
4871 used in the addresses. */
4872 if (overlay_list
== NULL
)
4873 overlay_vma
= exp_nameop (ADDR
, name
);
4875 /* Remember the section. */
4876 n
= xmalloc (sizeof *n
);
4877 n
->os
= current_section
;
4878 n
->next
= overlay_list
;
4881 size
= exp_nameop (SIZEOF
, name
);
4883 /* Arrange to work out the maximum section end address. */
4884 if (overlay_max
== NULL
)
4887 overlay_max
= exp_binop (MAX_K
, overlay_max
, size
);
4890 /* Finish a section in an overlay. There isn't any special to do
4894 lang_leave_overlay_section (fill_type
*fill
,
4895 lang_output_section_phdr_list
*phdrs
)
4902 name
= current_section
->name
;
4904 /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory
4905 region and that no load-time region has been specified. It doesn't
4906 really matter what we say here, since lang_leave_overlay will
4908 lang_leave_output_section_statement (fill
, DEFAULT_MEMORY_REGION
, phdrs
, 0);
4910 /* Define the magic symbols. */
4912 clean
= xmalloc (strlen (name
) + 1);
4914 for (s1
= name
; *s1
!= '\0'; s1
++)
4915 if (ISALNUM (*s1
) || *s1
== '_')
4919 buf
= xmalloc (strlen (clean
) + sizeof "__load_start_");
4920 sprintf (buf
, "__load_start_%s", clean
);
4921 lang_add_assignment (exp_assop ('=', buf
,
4922 exp_nameop (LOADADDR
, name
)));
4924 buf
= xmalloc (strlen (clean
) + sizeof "__load_stop_");
4925 sprintf (buf
, "__load_stop_%s", clean
);
4926 lang_add_assignment (exp_assop ('=', buf
,
4928 exp_nameop (LOADADDR
, name
),
4929 exp_nameop (SIZEOF
, name
))));
4934 /* Finish an overlay. If there are any overlay wide settings, this
4935 looks through all the sections in the overlay and sets them. */
4938 lang_leave_overlay (etree_type
*lma_expr
,
4941 const char *memspec
,
4942 lang_output_section_phdr_list
*phdrs
,
4943 const char *lma_memspec
)
4945 lang_memory_region_type
*region
;
4946 lang_memory_region_type
*lma_region
;
4947 struct overlay_list
*l
;
4948 lang_nocrossref_type
*nocrossref
;
4950 lang_get_regions (®ion
, &lma_region
,
4951 memspec
, lma_memspec
,
4952 lma_expr
!= NULL
, FALSE
);
4956 /* After setting the size of the last section, set '.' to end of the
4958 if (overlay_list
!= NULL
)
4959 overlay_list
->os
->update_dot_tree
4960 = exp_assop ('=', ".", exp_binop ('+', overlay_vma
, overlay_max
));
4965 struct overlay_list
*next
;
4967 if (fill
!= NULL
&& l
->os
->fill
== NULL
)
4970 l
->os
->region
= region
;
4971 l
->os
->lma_region
= lma_region
;
4973 /* The first section has the load address specified in the
4974 OVERLAY statement. The rest are worked out from that.
4975 The base address is not needed (and should be null) if
4976 an LMA region was specified. */
4978 l
->os
->load_base
= lma_expr
;
4979 else if (lma_region
== 0)
4980 l
->os
->load_base
= exp_binop ('+',
4981 exp_nameop (LOADADDR
, l
->next
->os
->name
),
4982 exp_nameop (SIZEOF
, l
->next
->os
->name
));
4984 if (phdrs
!= NULL
&& l
->os
->phdrs
== NULL
)
4985 l
->os
->phdrs
= phdrs
;
4989 lang_nocrossref_type
*nc
;
4991 nc
= xmalloc (sizeof *nc
);
4992 nc
->name
= l
->os
->name
;
4993 nc
->next
= nocrossref
;
5002 if (nocrossref
!= NULL
)
5003 lang_add_nocrossref (nocrossref
);
5006 overlay_list
= NULL
;
5010 /* Version handling. This is only useful for ELF. */
5012 /* This global variable holds the version tree that we build. */
5014 struct bfd_elf_version_tree
*lang_elf_version_info
;
5016 /* If PREV is NULL, return first version pattern matching particular symbol.
5017 If PREV is non-NULL, return first version pattern matching particular
5018 symbol after PREV (previously returned by lang_vers_match). */
5020 static struct bfd_elf_version_expr
*
5021 lang_vers_match (struct bfd_elf_version_expr_head
*head
,
5022 struct bfd_elf_version_expr
*prev
,
5025 const char *cxx_sym
= sym
;
5026 const char *java_sym
= sym
;
5027 struct bfd_elf_version_expr
*expr
= NULL
;
5029 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
5031 cxx_sym
= cplus_demangle (sym
, DMGL_PARAMS
| DMGL_ANSI
);
5035 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
5037 java_sym
= cplus_demangle (sym
, DMGL_JAVA
);
5042 if (head
->htab
&& (prev
== NULL
|| prev
->symbol
))
5044 struct bfd_elf_version_expr e
;
5046 switch (prev
? prev
->mask
: 0)
5049 if (head
->mask
& BFD_ELF_VERSION_C_TYPE
)
5052 expr
= htab_find (head
->htab
, &e
);
5053 while (expr
&& strcmp (expr
->symbol
, sym
) == 0)
5054 if (expr
->mask
== BFD_ELF_VERSION_C_TYPE
)
5060 case BFD_ELF_VERSION_C_TYPE
:
5061 if (head
->mask
& BFD_ELF_VERSION_CXX_TYPE
)
5064 expr
= htab_find (head
->htab
, &e
);
5065 while (expr
&& strcmp (expr
->symbol
, cxx_sym
) == 0)
5066 if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
5072 case BFD_ELF_VERSION_CXX_TYPE
:
5073 if (head
->mask
& BFD_ELF_VERSION_JAVA_TYPE
)
5075 e
.symbol
= java_sym
;
5076 expr
= htab_find (head
->htab
, &e
);
5077 while (expr
&& strcmp (expr
->symbol
, java_sym
) == 0)
5078 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
5089 /* Finally, try the wildcards. */
5090 if (prev
== NULL
|| prev
->symbol
)
5091 expr
= head
->remaining
;
5098 if (expr
->pattern
[0] == '*' && expr
->pattern
[1] == '\0')
5101 if (expr
->mask
== BFD_ELF_VERSION_JAVA_TYPE
)
5103 else if (expr
->mask
== BFD_ELF_VERSION_CXX_TYPE
)
5107 if (fnmatch (expr
->pattern
, s
, 0) == 0)
5114 free ((char *) cxx_sym
);
5115 if (java_sym
!= sym
)
5116 free ((char *) java_sym
);
5120 /* Return NULL if the PATTERN argument is a glob pattern, otherwise,
5121 return a string pointing to the symbol name. */
5124 realsymbol (const char *pattern
)
5127 bfd_boolean changed
= FALSE
, backslash
= FALSE
;
5128 char *s
, *symbol
= xmalloc (strlen (pattern
) + 1);
5130 for (p
= pattern
, s
= symbol
; *p
!= '\0'; ++p
)
5132 /* It is a glob pattern only if there is no preceding
5134 if (! backslash
&& (*p
== '?' || *p
== '*' || *p
== '['))
5142 /* Remove the preceding backslash. */
5149 backslash
= *p
== '\\';
5164 /* This is called for each variable name or match expression. */
5166 struct bfd_elf_version_expr
*
5167 lang_new_vers_pattern (struct bfd_elf_version_expr
*orig
,
5171 struct bfd_elf_version_expr
*ret
;
5173 ret
= xmalloc (sizeof *ret
);
5178 ret
->symbol
= realsymbol (new);
5180 if (lang
== NULL
|| strcasecmp (lang
, "C") == 0)
5181 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
5182 else if (strcasecmp (lang
, "C++") == 0)
5183 ret
->mask
= BFD_ELF_VERSION_CXX_TYPE
;
5184 else if (strcasecmp (lang
, "Java") == 0)
5185 ret
->mask
= BFD_ELF_VERSION_JAVA_TYPE
;
5188 einfo (_("%X%P: unknown language `%s' in version information\n"),
5190 ret
->mask
= BFD_ELF_VERSION_C_TYPE
;
5193 return ldemul_new_vers_pattern (ret
);
5196 /* This is called for each set of variable names and match
5199 struct bfd_elf_version_tree
*
5200 lang_new_vers_node (struct bfd_elf_version_expr
*globals
,
5201 struct bfd_elf_version_expr
*locals
)
5203 struct bfd_elf_version_tree
*ret
;
5205 ret
= xcalloc (1, sizeof *ret
);
5206 ret
->globals
.list
= globals
;
5207 ret
->locals
.list
= locals
;
5208 ret
->match
= lang_vers_match
;
5209 ret
->name_indx
= (unsigned int) -1;
5213 /* This static variable keeps track of version indices. */
5215 static int version_index
;
5218 version_expr_head_hash (const void *p
)
5220 const struct bfd_elf_version_expr
*e
= p
;
5222 return htab_hash_string (e
->symbol
);
5226 version_expr_head_eq (const void *p1
, const void *p2
)
5228 const struct bfd_elf_version_expr
*e1
= p1
;
5229 const struct bfd_elf_version_expr
*e2
= p2
;
5231 return strcmp (e1
->symbol
, e2
->symbol
) == 0;
5235 lang_finalize_version_expr_head (struct bfd_elf_version_expr_head
*head
)
5238 struct bfd_elf_version_expr
*e
, *next
;
5239 struct bfd_elf_version_expr
**list_loc
, **remaining_loc
;
5241 for (e
= head
->list
; e
; e
= e
->next
)
5245 head
->mask
|= e
->mask
;
5250 head
->htab
= htab_create (count
* 2, version_expr_head_hash
,
5251 version_expr_head_eq
, NULL
);
5252 list_loc
= &head
->list
;
5253 remaining_loc
= &head
->remaining
;
5254 for (e
= head
->list
; e
; e
= next
)
5260 remaining_loc
= &e
->next
;
5264 void **loc
= htab_find_slot (head
->htab
, e
, INSERT
);
5268 struct bfd_elf_version_expr
*e1
, *last
;
5274 if (e1
->mask
== e
->mask
)
5282 while (e1
&& strcmp (e1
->symbol
, e
->symbol
) == 0);
5286 /* This is a duplicate. */
5287 /* FIXME: Memory leak. Sometimes pattern is not
5288 xmalloced alone, but in larger chunk of memory. */
5289 /* free (e->symbol); */
5294 e
->next
= last
->next
;
5302 list_loc
= &e
->next
;
5306 *remaining_loc
= NULL
;
5307 *list_loc
= head
->remaining
;
5310 head
->remaining
= head
->list
;
5313 /* This is called when we know the name and dependencies of the
5317 lang_register_vers_node (const char *name
,
5318 struct bfd_elf_version_tree
*version
,
5319 struct bfd_elf_version_deps
*deps
)
5321 struct bfd_elf_version_tree
*t
, **pp
;
5322 struct bfd_elf_version_expr
*e1
;
5327 if ((name
[0] == '\0' && lang_elf_version_info
!= NULL
)
5328 || (lang_elf_version_info
&& lang_elf_version_info
->name
[0] == '\0'))
5330 einfo (_("%X%P: anonymous version tag cannot be combined with other version tags\n"));
5335 /* Make sure this node has a unique name. */
5336 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
5337 if (strcmp (t
->name
, name
) == 0)
5338 einfo (_("%X%P: duplicate version tag `%s'\n"), name
);
5340 lang_finalize_version_expr_head (&version
->globals
);
5341 lang_finalize_version_expr_head (&version
->locals
);
5343 /* Check the global and local match names, and make sure there
5344 aren't any duplicates. */
5346 for (e1
= version
->globals
.list
; e1
!= NULL
; e1
= e1
->next
)
5348 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
5350 struct bfd_elf_version_expr
*e2
;
5352 if (t
->locals
.htab
&& e1
->symbol
)
5354 e2
= htab_find (t
->locals
.htab
, e1
);
5355 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
5357 if (e1
->mask
== e2
->mask
)
5358 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5363 else if (!e1
->symbol
)
5364 for (e2
= t
->locals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
5365 if (strcmp (e1
->pattern
, e2
->pattern
) == 0 && e1
->mask
== e2
->mask
)
5366 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5371 for (e1
= version
->locals
.list
; e1
!= NULL
; e1
= e1
->next
)
5373 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
5375 struct bfd_elf_version_expr
*e2
;
5377 if (t
->globals
.htab
&& e1
->symbol
)
5379 e2
= htab_find (t
->globals
.htab
, e1
);
5380 while (e2
&& strcmp (e1
->symbol
, e2
->symbol
) == 0)
5382 if (e1
->mask
== e2
->mask
)
5383 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5388 else if (!e1
->symbol
)
5389 for (e2
= t
->globals
.remaining
; e2
!= NULL
; e2
= e2
->next
)
5390 if (strcmp (e1
->pattern
, e2
->pattern
) == 0 && e1
->mask
== e2
->mask
)
5391 einfo (_("%X%P: duplicate expression `%s' in version information\n"),
5396 version
->deps
= deps
;
5397 version
->name
= name
;
5398 if (name
[0] != '\0')
5401 version
->vernum
= version_index
;
5404 version
->vernum
= 0;
5406 for (pp
= &lang_elf_version_info
; *pp
!= NULL
; pp
= &(*pp
)->next
)
5411 /* This is called when we see a version dependency. */
5413 struct bfd_elf_version_deps
*
5414 lang_add_vers_depend (struct bfd_elf_version_deps
*list
, const char *name
)
5416 struct bfd_elf_version_deps
*ret
;
5417 struct bfd_elf_version_tree
*t
;
5419 ret
= xmalloc (sizeof *ret
);
5422 for (t
= lang_elf_version_info
; t
!= NULL
; t
= t
->next
)
5424 if (strcmp (t
->name
, name
) == 0)
5426 ret
->version_needed
= t
;
5431 einfo (_("%X%P: unable to find version dependency `%s'\n"), name
);
5437 lang_do_version_exports_section (void)
5439 struct bfd_elf_version_expr
*greg
= NULL
, *lreg
;
5441 LANG_FOR_EACH_INPUT_STATEMENT (is
)
5443 asection
*sec
= bfd_get_section_by_name (is
->the_bfd
, ".exports");
5450 len
= bfd_section_size (is
->the_bfd
, sec
);
5451 contents
= xmalloc (len
);
5452 if (!bfd_get_section_contents (is
->the_bfd
, sec
, contents
, 0, len
))
5453 einfo (_("%X%P: unable to read .exports section contents\n"), sec
);
5456 while (p
< contents
+ len
)
5458 greg
= lang_new_vers_pattern (greg
, p
, NULL
);
5459 p
= strchr (p
, '\0') + 1;
5462 /* Do not free the contents, as we used them creating the regex. */
5464 /* Do not include this section in the link. */
5465 bfd_set_section_flags (is
->the_bfd
, sec
,
5466 bfd_get_section_flags (is
->the_bfd
, sec
) | SEC_EXCLUDE
);
5469 lreg
= lang_new_vers_pattern (NULL
, "*", NULL
);
5470 lang_register_vers_node (command_line
.version_exports_section
,
5471 lang_new_vers_node (greg
, lreg
), NULL
);
5475 lang_add_unique (const char *name
)
5477 struct unique_sections
*ent
;
5479 for (ent
= unique_section_list
; ent
; ent
= ent
->next
)
5480 if (strcmp (ent
->name
, name
) == 0)
5483 ent
= xmalloc (sizeof *ent
);
5484 ent
->name
= xstrdup (name
);
5485 ent
->next
= unique_section_list
;
5486 unique_section_list
= ent
;