1 /* ldlang.h - linker command language support
2 Copyright 1991, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
4 This file is part of GLD, the Gnu Linker.
6 GLD is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 1, or (at your option)
11 GLD is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GLD; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 lang_input_file_is_l_enum
,
26 lang_input_file_is_symbols_only_enum
,
27 lang_input_file_is_marker_enum
,
28 lang_input_file_is_fake_enum
,
29 lang_input_file_is_search_file_enum
,
30 lang_input_file_is_file_enum
31 } lang_input_file_enum_type
;
33 typedef unsigned int fill_type
;
34 typedef struct statement_list
36 union lang_statement_union
*head
;
37 union lang_statement_union
**tail
;
38 } lang_statement_list_type
;
41 typedef struct memory_region_struct
44 struct memory_region_struct
*next
;
48 bfd_size_type old_length
;
50 boolean had_full_message
;
51 } lang_memory_region_type
;
53 typedef struct lang_statement_header_struct
55 union lang_statement_union
*next
;
58 lang_output_section_statement_enum
,
59 lang_assignment_statement_enum
,
60 lang_input_statement_enum
,
61 lang_address_statement_enum
,
62 lang_wild_statement_enum
,
63 lang_input_section_enum
,
64 lang_object_symbols_statement_enum
,
65 lang_fill_statement_enum
,
66 lang_data_statement_enum
,
67 lang_reloc_statement_enum
,
68 lang_target_statement_enum
,
69 lang_output_statement_enum
,
70 lang_padding_statement_enum
,
71 lang_group_statement_enum
,
73 lang_afile_asection_pair_statement_enum
,
74 lang_constructors_statement_enum
76 } lang_statement_header_type
;
81 lang_statement_header_type header
;
82 union etree_union
*exp
;
83 } lang_assignment_statement_type
;
86 typedef struct lang_target_statement_struct
88 lang_statement_header_type header
;
90 } lang_target_statement_type
;
93 typedef struct lang_output_statement_struct
95 lang_statement_header_type header
;
97 } lang_output_statement_type
;
99 /* Section types specified in a linker script. */
111 /* This structure holds a list of program headers describing segments
112 in which this section should be placed. */
114 struct lang_output_section_phdr_list
116 struct lang_output_section_phdr_list
*next
;
121 typedef struct lang_output_section_statement_struct
123 lang_statement_header_type header
;
124 union etree_union
*addr_tree
;
125 lang_statement_list_type children
;
127 union lang_statement_union
*next
;
132 asection
*bfd_section
;
133 int flags
; /* Or together of all input sections */
134 enum section_type sectype
;
135 struct memory_region_struct
*region
;
139 int subsection_alignment
; /* alignment of components */
140 int section_alignment
; /* alignment of start of section */
142 union etree_union
*load_base
;
144 struct lang_output_section_phdr_list
*phdrs
;
145 } lang_output_section_statement_type
;
150 lang_statement_header_type header
;
151 } lang_common_statement_type
;
155 lang_statement_header_type header
;
156 } lang_object_symbols_statement_type
;
160 lang_statement_header_type header
;
163 asection
*output_section
;
164 } lang_fill_statement_type
;
168 lang_statement_header_type header
;
170 union etree_union
*exp
;
172 asection
*output_section
;
174 } lang_data_statement_type
;
176 /* Generate a reloc in the output file. */
180 lang_statement_header_type header
;
182 /* Reloc to generate. */
183 bfd_reloc_code_real_type reloc
;
185 /* Reloc howto structure. */
186 reloc_howto_type
*howto
;
188 /* Section to generate reloc against. Exactly one of section and
189 name must be NULL. */
192 /* Name of symbol to generate reloc against. Exactly one of section
193 and name must be NULL. */
196 /* Expression for addend. */
197 union etree_union
*addend_exp
;
199 /* Resolved addend. */
200 bfd_vma addend_value
;
202 /* Output section where reloc should be performed. */
203 asection
*output_section
;
205 /* VMA within output section. */
207 } lang_reloc_statement_type
;
209 typedef struct lang_input_statement_struct
211 lang_statement_header_type header
;
212 /* Name of this file. */
213 const char *filename
;
214 /* Name to use for the symbol giving address of text start */
215 /* Usually the same as filename, but for a file spec'd with -l
216 this is the -l switch itself rather than the filename. */
217 const char *local_sym_name
;
222 file_ptr passive_position
;
224 /* Symbol table of the file. */
226 unsigned int symbol_count
;
228 /* Point to the next file - whatever it is, wanders up and down
231 union lang_statement_union
*next
;
232 /* Point to the next file, but skips archive contents */
233 union lang_statement_union
*next_real_file
;
237 /* 1 means search a set of directories for this file. */
238 boolean search_dirs_flag
;
240 /* 1 means this is base file of incremental load.
241 Do not load this file's text or data.
242 Also default text_start to after this file's bss. */
244 boolean just_syms_flag
;
246 /* Whether to search for this entry as a dynamic archive. */
249 /* Whether to include the entire contents of an archive. */
250 boolean whole_archive
;
254 /* unsigned int globals_in_this_file;*/
257 } lang_input_statement_type
;
261 lang_statement_header_type header
;
263 lang_input_statement_type
*ifile
;
265 } lang_input_section_type
;
270 lang_statement_header_type header
;
272 union lang_statement_union
*file
;
273 } lang_afile_asection_pair_statement_type
;
275 typedef struct lang_wild_statement_struct
277 lang_statement_header_type header
;
278 const char *section_name
;
279 const char *filename
;
280 lang_statement_list_type children
;
281 } lang_wild_statement_type
;
283 typedef struct lang_address_statement_struct
285 lang_statement_header_type header
;
286 const char *section_name
;
287 union etree_union
*address
;
288 } lang_address_statement_type
;
292 lang_statement_header_type header
;
293 bfd_vma output_offset
;
295 asection
*output_section
;
297 } lang_padding_statement_type
;
299 /* A group statement collects a set of libraries together. The
300 libraries are searched multiple times, until no new undefined
301 symbols are found. The effect is to search a group of libraries as
302 though they were a single library. */
306 lang_statement_header_type header
;
307 lang_statement_list_type children
;
308 } lang_group_statement_type
;
310 typedef union lang_statement_union
312 lang_statement_header_type header
;
313 union lang_statement_union
*next
;
314 lang_wild_statement_type wild_statement
;
315 lang_data_statement_type data_statement
;
316 lang_reloc_statement_type reloc_statement
;
317 lang_address_statement_type address_statement
;
318 lang_output_section_statement_type output_section_statement
;
319 lang_afile_asection_pair_statement_type afile_asection_pair_statement
;
320 lang_assignment_statement_type assignment_statement
;
321 lang_input_statement_type input_statement
;
322 lang_target_statement_type target_statement
;
323 lang_output_statement_type output_statement
;
324 lang_input_section_type input_section
;
325 lang_common_statement_type common_statement
;
326 lang_object_symbols_statement_type object_symbols_statement
;
327 lang_fill_statement_type fill_statement
;
328 lang_padding_statement_type padding_statement
;
329 lang_group_statement_type group_statement
;
330 } lang_statement_union_type
;
332 /* This structure holds information about a program header, from the
333 PHDRS command in the linker script. */
337 struct lang_phdr
*next
;
346 /* This structure is used to hold a list of sections which may not
347 cross reference each other. */
349 struct lang_nocrossref
351 struct lang_nocrossref
*next
;
355 /* The list of nocrossref lists. */
357 struct lang_nocrossrefs
359 struct lang_nocrossrefs
*next
;
360 struct lang_nocrossref
*list
;
363 extern struct lang_nocrossrefs
*nocrossref_list
;
365 extern lang_output_section_statement_type
*abs_output_section
;
366 extern boolean lang_has_input_file
;
367 extern etree_type
*base
;
368 extern lang_statement_list_type
*stat_ptr
;
369 extern boolean delete_output_file_on_failure
;
371 extern const char *entry_symbol
;
372 extern boolean entry_from_cmdline
;
374 extern void lang_init
PARAMS ((void));
375 extern struct memory_region_struct
*lang_memory_region_lookup
376 PARAMS ((const char *const));
377 extern void lang_map
PARAMS ((void));
378 extern void lang_set_flags
PARAMS ((int *, const char *));
379 extern void lang_add_output
PARAMS ((const char *, int from_script
));
380 extern void lang_enter_output_section_statement
381 PARAMS ((const char *output_section_statement_name
,
382 etree_type
* address_exp
,
383 enum section_type sectype
,
386 etree_type
*subalign
,
388 extern void lang_final
PARAMS ((void));
389 extern void lang_process
PARAMS ((void));
390 extern void lang_section_start
PARAMS ((const char *, union etree_union
*));
391 extern void lang_add_entry
PARAMS ((const char *, boolean
));
392 extern void lang_add_target
PARAMS ((const char *));
393 extern void lang_add_wild
PARAMS ((const char *const , const char *const));
394 extern void lang_add_map
PARAMS ((const char *));
395 extern void lang_add_fill
PARAMS ((int));
396 extern void lang_add_assignment
PARAMS ((union etree_union
*));
397 extern void lang_add_attribute
PARAMS ((enum statement_enum
));
398 extern void lang_startup
PARAMS ((const char *));
399 extern void lang_float
PARAMS ((enum bfd_boolean
));
400 extern void lang_leave_output_section_statement
PARAMS ((bfd_vma
,
402 extern void lang_abs_symbol_at_end_of
PARAMS ((const char *, const char *));
403 extern void lang_abs_symbol_at_beginning_of
PARAMS ((const char *,
405 extern void lang_statement_append
PARAMS ((struct statement_list
*,
406 union lang_statement_union
*,
407 union lang_statement_union
**));
408 extern void lang_for_each_input_file
409 PARAMS ((void (*dothis
) (lang_input_statement_type
*)));
410 extern void lang_for_each_file
411 PARAMS ((void (*dothis
) (lang_input_statement_type
*)));
412 extern bfd_vma lang_do_assignments
413 PARAMS ((lang_statement_union_type
* s
,
414 lang_output_section_statement_type
*output_section_statement
,
418 #define LANG_FOR_EACH_INPUT_STATEMENT(statement) \
419 extern lang_statement_list_type file_chain; \
420 lang_input_statement_type *statement; \
421 for (statement = (lang_input_statement_type *)file_chain.head;\
422 statement != (lang_input_statement_type *)NULL; \
423 statement = (lang_input_statement_type *)statement->next)\
425 extern void lang_process
PARAMS ((void));
426 extern void ldlang_add_file
PARAMS ((lang_input_statement_type
*));
427 extern lang_output_section_statement_type
*lang_output_section_find
428 PARAMS ((const char * const));
429 extern lang_input_statement_type
*lang_add_input_file
430 PARAMS ((const char *name
, lang_input_file_enum_type file_type
,
431 const char *target
));
432 extern void lang_add_keepsyms_file
PARAMS ((const char *filename
));
433 extern lang_output_section_statement_type
*
434 lang_output_section_statement_lookup
PARAMS ((const char * const name
));
435 extern void ldlang_add_undef
PARAMS ((const char *const name
));
436 extern void lang_add_output_format
PARAMS ((const char *, const char *,
437 const char *, int from_script
));
438 extern void lang_list_init
PARAMS ((lang_statement_list_type
*));
439 extern void lang_add_data
PARAMS ((int type
, union etree_union
*));
440 extern void lang_add_reloc
441 PARAMS ((bfd_reloc_code_real_type reloc
, reloc_howto_type
*howto
,
442 asection
*section
, const char *name
, union etree_union
*addend
));
443 extern void lang_for_each_statement
444 PARAMS ((void (*func
) (lang_statement_union_type
*)));
445 extern PTR stat_alloc
PARAMS ((size_t size
));
446 extern bfd_vma lang_size_sections
447 PARAMS ((lang_statement_union_type
*s
,
448 lang_output_section_statement_type
*output_section_statement
,
449 lang_statement_union_type
**prev
, fill_type fill
,
450 bfd_vma dot
, boolean relax
));
451 extern void lang_enter_group
PARAMS ((void));
452 extern void lang_leave_group
PARAMS ((void));
453 extern void wild_doit
454 PARAMS ((lang_statement_list_type
*ptr
, asection
*section
,
455 lang_output_section_statement_type
*output
,
456 lang_input_statement_type
*file
));
457 extern void lang_new_phdr
458 PARAMS ((const char *, etree_type
*, boolean
, boolean
, etree_type
*,
460 extern void lang_section_in_phdr
PARAMS ((const char *));
461 extern void lang_add_nocrossref
PARAMS ((struct lang_nocrossref
*));