1 /* ldlang.h - 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
27 lang_input_file_is_l_enum
,
28 lang_input_file_is_symbols_only_enum
,
29 lang_input_file_is_marker_enum
,
30 lang_input_file_is_fake_enum
,
31 lang_input_file_is_search_file_enum
,
32 lang_input_file_is_file_enum
33 } lang_input_file_enum_type
;
37 unsigned char data
[1];
40 typedef struct statement_list
{
41 union lang_statement_union
*head
;
42 union lang_statement_union
**tail
;
43 } lang_statement_list_type
;
45 typedef struct memory_region_struct
{
47 struct memory_region_struct
*next
;
51 bfd_size_type old_length
;
54 boolean had_full_message
;
55 } lang_memory_region_type
;
57 typedef struct lang_statement_header_struct
{
58 union lang_statement_union
*next
;
60 lang_output_section_statement_enum
,
61 lang_assignment_statement_enum
,
62 lang_input_statement_enum
,
63 lang_address_statement_enum
,
64 lang_wild_statement_enum
,
65 lang_input_section_enum
,
66 lang_object_symbols_statement_enum
,
67 lang_fill_statement_enum
,
68 lang_data_statement_enum
,
69 lang_reloc_statement_enum
,
70 lang_target_statement_enum
,
71 lang_output_statement_enum
,
72 lang_padding_statement_enum
,
73 lang_group_statement_enum
,
75 lang_afile_asection_pair_statement_enum
,
76 lang_constructors_statement_enum
78 } lang_statement_header_type
;
81 lang_statement_header_type header
;
82 union etree_union
*exp
;
83 } lang_assignment_statement_type
;
85 typedef struct lang_target_statement_struct
{
86 lang_statement_header_type header
;
88 } lang_target_statement_type
;
90 typedef struct lang_output_statement_struct
{
91 lang_statement_header_type header
;
93 } lang_output_statement_type
;
95 /* Section types specified in a linker script. */
106 /* This structure holds a list of program headers describing segments
107 in which this section should be placed. */
109 struct lang_output_section_phdr_list
{
110 struct lang_output_section_phdr_list
*next
;
115 typedef struct lang_output_section_statement_struct
{
116 lang_statement_header_type header
;
117 union etree_union
*addr_tree
;
118 lang_statement_list_type children
;
120 union lang_statement_union
*next
;
125 asection
*bfd_section
;
126 flagword flags
; /* Or together of all input sections */
127 enum section_type sectype
;
128 struct memory_region_struct
*region
;
129 struct memory_region_struct
*lma_region
;
133 int subsection_alignment
; /* alignment of components */
134 int section_alignment
; /* alignment of start of section */
136 union etree_union
*load_base
;
138 struct lang_output_section_phdr_list
*phdrs
;
139 } lang_output_section_statement_type
;
142 lang_statement_header_type header
;
143 } lang_common_statement_type
;
146 lang_statement_header_type header
;
147 } lang_object_symbols_statement_type
;
150 lang_statement_header_type header
;
153 asection
*output_section
;
154 } lang_fill_statement_type
;
157 lang_statement_header_type header
;
159 union etree_union
*exp
;
161 asection
*output_section
;
163 } lang_data_statement_type
;
165 /* Generate a reloc in the output file. */
168 lang_statement_header_type header
;
170 /* Reloc to generate. */
171 bfd_reloc_code_real_type reloc
;
173 /* Reloc howto structure. */
174 reloc_howto_type
*howto
;
176 /* Section to generate reloc against. Exactly one of section and
177 name must be NULL. */
180 /* Name of symbol to generate reloc against. Exactly one of section
181 and name must be NULL. */
184 /* Expression for addend. */
185 union etree_union
*addend_exp
;
187 /* Resolved addend. */
188 bfd_vma addend_value
;
190 /* Output section where reloc should be performed. */
191 asection
*output_section
;
193 /* VMA within output section. */
195 } lang_reloc_statement_type
;
197 typedef struct lang_input_statement_struct
{
198 lang_statement_header_type header
;
199 /* Name of this file. */
200 const char *filename
;
201 /* Name to use for the symbol giving address of text start */
202 /* Usually the same as filename, but for a file spec'd with -l
203 this is the -l switch itself rather than the filename. */
204 const char *local_sym_name
;
209 file_ptr passive_position
;
211 /* Symbol table of the file. */
213 unsigned int symbol_count
;
215 /* Point to the next file - whatever it is, wanders up and down
218 union lang_statement_union
*next
;
219 /* Point to the next file, but skips archive contents */
220 union lang_statement_union
*next_real_file
;
224 /* 1 means search a set of directories for this file. */
225 boolean search_dirs_flag
;
227 /* 1 means this is base file of incremental load.
228 Do not load this file's text or data.
229 Also default text_start to after this file's bss. */
231 boolean just_syms_flag
;
233 /* Whether to search for this entry as a dynamic archive. */
236 /* Whether to include the entire contents of an archive. */
237 boolean whole_archive
;
242 unsigned int globals_in_this_file
;
246 } lang_input_statement_type
;
249 lang_statement_header_type header
;
251 lang_input_statement_type
*ifile
;
253 } lang_input_section_type
;
256 lang_statement_header_type header
;
258 union lang_statement_union
*file
;
259 } lang_afile_asection_pair_statement_type
;
261 typedef struct lang_wild_statement_struct
{
262 lang_statement_header_type header
;
263 const char *filename
;
264 boolean filenames_sorted
;
265 struct wildcard_list
*section_list
;
266 boolean keep_sections
;
267 lang_statement_list_type children
;
268 } lang_wild_statement_type
;
270 typedef struct lang_address_statement_struct
{
271 lang_statement_header_type header
;
272 const char *section_name
;
273 union etree_union
*address
;
274 } lang_address_statement_type
;
277 lang_statement_header_type header
;
278 bfd_vma output_offset
;
280 asection
*output_section
;
282 } lang_padding_statement_type
;
284 /* A group statement collects a set of libraries together. The
285 libraries are searched multiple times, until no new undefined
286 symbols are found. The effect is to search a group of libraries as
287 though they were a single library. */
290 lang_statement_header_type header
;
291 lang_statement_list_type children
;
292 } lang_group_statement_type
;
294 typedef union lang_statement_union
{
295 lang_statement_header_type header
;
296 lang_wild_statement_type wild_statement
;
297 lang_data_statement_type data_statement
;
298 lang_reloc_statement_type reloc_statement
;
299 lang_address_statement_type address_statement
;
300 lang_output_section_statement_type output_section_statement
;
301 lang_afile_asection_pair_statement_type afile_asection_pair_statement
;
302 lang_assignment_statement_type assignment_statement
;
303 lang_input_statement_type input_statement
;
304 lang_target_statement_type target_statement
;
305 lang_output_statement_type output_statement
;
306 lang_input_section_type input_section
;
307 lang_common_statement_type common_statement
;
308 lang_object_symbols_statement_type object_symbols_statement
;
309 lang_fill_statement_type fill_statement
;
310 lang_padding_statement_type padding_statement
;
311 lang_group_statement_type group_statement
;
312 } lang_statement_union_type
;
314 /* This structure holds information about a program header, from the
315 PHDRS command in the linker script. */
318 struct lang_phdr
*next
;
327 /* This structure is used to hold a list of sections which may not
328 cross reference each other. */
330 struct lang_nocrossref
{
331 struct lang_nocrossref
*next
;
335 /* The list of nocrossref lists. */
337 struct lang_nocrossrefs
{
338 struct lang_nocrossrefs
*next
;
339 struct lang_nocrossref
*list
;
342 extern struct lang_nocrossrefs
*nocrossref_list
;
344 /* This structure is used to hold a list of input section names which
345 will not match an output section in the linker script. */
347 struct unique_sections
{
348 struct unique_sections
*next
;
352 extern struct unique_sections
*unique_section_list
;
354 extern lang_output_section_statement_type
*abs_output_section
;
355 extern lang_statement_list_type lang_output_section_statement
;
356 extern boolean lang_has_input_file
;
357 extern etree_type
*base
;
358 extern lang_statement_list_type
*stat_ptr
;
359 extern boolean delete_output_file_on_failure
;
361 extern const char *entry_symbol
;
362 extern const char *entry_section
;
363 extern boolean entry_from_cmdline
;
364 extern lang_statement_list_type file_chain
;
366 extern void lang_init
PARAMS ((void));
367 extern struct memory_region_struct
*lang_memory_region_lookup
368 PARAMS ((const char *const));
369 extern struct memory_region_struct
*lang_memory_region_default
370 PARAMS ((asection
*));
371 extern void lang_map
PARAMS ((void));
372 extern void lang_set_flags
PARAMS ((lang_memory_region_type
*, const char *,
374 extern void lang_add_output
PARAMS ((const char *, int from_script
));
375 extern lang_output_section_statement_type
*lang_enter_output_section_statement
376 PARAMS ((const char *output_section_statement_name
,
377 etree_type
* address_exp
,
378 enum section_type sectype
,
381 etree_type
*subalign
,
383 extern void lang_final
PARAMS ((void));
384 extern void lang_process
PARAMS ((void));
385 extern void lang_section_start
PARAMS ((const char *, union etree_union
*));
386 extern void lang_add_entry
PARAMS ((const char *, boolean
));
387 extern void lang_add_target
PARAMS ((const char *));
388 extern void lang_add_wild
389 PARAMS ((struct wildcard_spec
*, struct wildcard_list
*, boolean
));
390 extern void lang_add_map
PARAMS ((const char *));
391 extern void lang_add_fill
PARAMS ((fill_type
*));
392 extern lang_assignment_statement_type
* lang_add_assignment
PARAMS ((union etree_union
*));
393 extern void lang_add_attribute
PARAMS ((enum statement_enum
));
394 extern void lang_startup
PARAMS ((const char *));
395 extern void lang_float
PARAMS ((enum bfd_boolean
));
396 extern void lang_leave_output_section_statement
397 PARAMS ((fill_type
*, const char *, struct lang_output_section_phdr_list
*,
399 extern void lang_abs_symbol_at_end_of
PARAMS ((const char *, const char *));
400 extern void lang_abs_symbol_at_beginning_of
PARAMS ((const char *,
402 extern void lang_statement_append
PARAMS ((struct statement_list
*,
403 union lang_statement_union
*,
404 union lang_statement_union
**));
405 extern void lang_for_each_input_file
406 PARAMS ((void (*dothis
) (lang_input_statement_type
*)));
407 extern void lang_for_each_file
408 PARAMS ((void (*dothis
) (lang_input_statement_type
*)));
409 extern void lang_reset_memory_regions
PARAMS ((void));
410 extern bfd_vma lang_do_assignments
411 PARAMS ((lang_statement_union_type
* s
,
412 lang_output_section_statement_type
*output_section_statement
,
416 #define LANG_FOR_EACH_INPUT_STATEMENT(statement) \
417 lang_input_statement_type *statement; \
418 for (statement = (lang_input_statement_type *)file_chain.head;\
419 statement != (lang_input_statement_type *)NULL; \
420 statement = (lang_input_statement_type *)statement->next)\
422 extern void lang_process PARAMS ((void));
423 extern void ldlang_add_file
PARAMS ((lang_input_statement_type
*));
424 extern lang_output_section_statement_type
*lang_output_section_find
425 PARAMS ((const char * const));
426 extern lang_input_statement_type
*lang_add_input_file
427 PARAMS ((const char *name
, lang_input_file_enum_type file_type
,
428 const char *target
));
429 extern void lang_add_keepsyms_file
PARAMS ((const char *filename
));
430 extern lang_output_section_statement_type
*
431 lang_output_section_statement_lookup
PARAMS ((const char * const name
));
432 extern void ldlang_add_undef
PARAMS ((const char *const name
));
433 extern void lang_add_output_format
PARAMS ((const char *, const char *,
434 const char *, int from_script
));
435 extern void lang_list_init
PARAMS ((lang_statement_list_type
*));
436 extern void lang_add_data
PARAMS ((int type
, union etree_union
*));
437 extern void lang_add_reloc
438 PARAMS ((bfd_reloc_code_real_type reloc
, reloc_howto_type
*howto
,
439 asection
*section
, const char *name
, union etree_union
*addend
));
440 extern void lang_for_each_statement
441 PARAMS ((void (*func
) (lang_statement_union_type
*)));
442 extern PTR stat_alloc
PARAMS ((size_t size
));
443 extern void dprint_statement
PARAMS ((lang_statement_union_type
*, int));
444 extern bfd_vma lang_size_sections
445 PARAMS ((lang_statement_union_type
*s
,
446 lang_output_section_statement_type
*output_section_statement
,
447 lang_statement_union_type
**prev
, fill_type
*fill
,
448 bfd_vma dot
, boolean
*relax
));
449 extern void lang_enter_group
PARAMS ((void));
450 extern void lang_leave_group
PARAMS ((void));
451 extern void lang_add_section
452 PARAMS ((lang_statement_list_type
*ptr
, asection
*section
,
453 lang_output_section_statement_type
*output
,
454 lang_input_statement_type
*file
));
455 extern void lang_new_phdr
456 PARAMS ((const char *, etree_type
*, boolean
, boolean
, etree_type
*,
458 extern void lang_add_nocrossref
PARAMS ((struct lang_nocrossref
*));
459 extern void lang_enter_overlay
PARAMS ((etree_type
*, etree_type
*, int));
460 extern void lang_enter_overlay_section
PARAMS ((const char *));
461 extern void lang_leave_overlay_section
462 PARAMS ((fill_type
*, struct lang_output_section_phdr_list
*));
463 extern void lang_leave_overlay
464 PARAMS ((fill_type
*, const char *, struct lang_output_section_phdr_list
*,
467 extern struct bfd_elf_version_tree
*lang_elf_version_info
;
469 extern struct bfd_elf_version_expr
*lang_new_vers_pattern
470 PARAMS ((struct bfd_elf_version_expr
*, const char *, const char *));
471 extern struct bfd_elf_version_tree
*lang_new_vers_node
472 PARAMS ((struct bfd_elf_version_expr
*, struct bfd_elf_version_expr
*));
473 extern struct bfd_elf_version_deps
*lang_add_vers_depend
474 PARAMS ((struct bfd_elf_version_deps
*, const char *));
475 extern void lang_register_vers_node
476 PARAMS ((const char *, struct bfd_elf_version_tree
*,
477 struct bfd_elf_version_deps
*));
478 boolean unique_section_p
PARAMS ((const char *));
479 extern void lang_add_unique
PARAMS ((const char *));