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 1, 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;
35 typedef unsigned int fill_type;
37 typedef struct statement_list {
38 union lang_statement_union *head;
39 union lang_statement_union **tail;
40 } lang_statement_list_type;
42 typedef struct memory_region_struct {
44 struct memory_region_struct *next;
48 bfd_size_type old_length;
51 boolean had_full_message;
52 } lang_memory_region_type;
54 typedef struct lang_statement_header_struct {
55 union lang_statement_union *next;
57 lang_output_section_statement_enum,
58 lang_assignment_statement_enum,
59 lang_input_statement_enum,
60 lang_address_statement_enum,
61 lang_wild_statement_enum,
62 lang_input_section_enum,
63 lang_object_symbols_statement_enum,
64 lang_fill_statement_enum,
65 lang_data_statement_enum,
66 lang_reloc_statement_enum,
67 lang_target_statement_enum,
68 lang_output_statement_enum,
69 lang_padding_statement_enum,
70 lang_group_statement_enum,
72 lang_afile_asection_pair_statement_enum,
73 lang_constructors_statement_enum
75 } lang_statement_header_type;
78 lang_statement_header_type header;
79 union etree_union *exp;
80 } lang_assignment_statement_type;
82 typedef struct lang_target_statement_struct {
83 lang_statement_header_type header;
85 } lang_target_statement_type;
87 typedef struct lang_output_statement_struct {
88 lang_statement_header_type header;
90 } lang_output_statement_type;
92 /* Section types specified in a linker script. */
103 /* This structure holds a list of program headers describing segments
104 in which this section should be placed. */
106 struct lang_output_section_phdr_list {
107 struct lang_output_section_phdr_list *next;
112 typedef struct lang_output_section_statement_struct {
113 lang_statement_header_type header;
114 union etree_union *addr_tree;
115 lang_statement_list_type children;
117 union lang_statement_union *next;
122 asection *bfd_section;
123 flagword flags; /* Or together of all input sections */
124 enum section_type sectype;
125 struct memory_region_struct *region;
126 struct memory_region_struct *lma_region;
130 int subsection_alignment; /* alignment of components */
131 int section_alignment; /* alignment of start of section */
133 union etree_union *load_base;
135 struct lang_output_section_phdr_list *phdrs;
136 } lang_output_section_statement_type;
139 lang_statement_header_type header;
140 } lang_common_statement_type;
143 lang_statement_header_type header;
144 } lang_object_symbols_statement_type;
147 lang_statement_header_type header;
150 asection *output_section;
151 } lang_fill_statement_type;
154 lang_statement_header_type header;
156 union etree_union *exp;
158 asection *output_section;
160 } lang_data_statement_type;
162 /* Generate a reloc in the output file. */
165 lang_statement_header_type header;
167 /* Reloc to generate. */
168 bfd_reloc_code_real_type reloc;
170 /* Reloc howto structure. */
171 reloc_howto_type *howto;
173 /* Section to generate reloc against. Exactly one of section and
174 name must be NULL. */
177 /* Name of symbol to generate reloc against. Exactly one of section
178 and name must be NULL. */
181 /* Expression for addend. */
182 union etree_union *addend_exp;
184 /* Resolved addend. */
185 bfd_vma addend_value;
187 /* Output section where reloc should be performed. */
188 asection *output_section;
190 /* VMA within output section. */
192 } lang_reloc_statement_type;
194 typedef struct lang_input_statement_struct {
195 lang_statement_header_type header;
196 /* Name of this file. */
197 const char *filename;
198 /* Name to use for the symbol giving address of text start */
199 /* Usually the same as filename, but for a file spec'd with -l
200 this is the -l switch itself rather than the filename. */
201 const char *local_sym_name;
206 file_ptr passive_position;
208 /* Symbol table of the file. */
210 unsigned int symbol_count;
212 /* Point to the next file - whatever it is, wanders up and down
215 union lang_statement_union *next;
216 /* Point to the next file, but skips archive contents */
217 union lang_statement_union *next_real_file;
221 /* 1 means search a set of directories for this file. */
222 boolean search_dirs_flag;
224 /* 1 means this is base file of incremental load.
225 Do not load this file's text or data.
226 Also default text_start to after this file's bss. */
228 boolean just_syms_flag;
230 /* Whether to search for this entry as a dynamic archive. */
233 /* Whether to include the entire contents of an archive. */
234 boolean whole_archive;
239 unsigned int globals_in_this_file;
243 } lang_input_statement_type;
246 lang_statement_header_type header;
248 lang_input_statement_type *ifile;
250 } lang_input_section_type;
253 lang_statement_header_type header;
255 union lang_statement_union *file;
256 } lang_afile_asection_pair_statement_type;
258 typedef struct lang_wild_statement_struct {
259 lang_statement_header_type header;
260 const char *filename;
261 boolean filenames_sorted;
262 struct wildcard_list *section_list;
263 boolean keep_sections;
264 lang_statement_list_type children;
265 } lang_wild_statement_type;
267 typedef struct lang_address_statement_struct {
268 lang_statement_header_type header;
269 const char *section_name;
270 union etree_union *address;
271 } lang_address_statement_type;
274 lang_statement_header_type header;
275 bfd_vma output_offset;
277 asection *output_section;
279 } lang_padding_statement_type;
281 /* A group statement collects a set of libraries together. The
282 libraries are searched multiple times, until no new undefined
283 symbols are found. The effect is to search a group of libraries as
284 though they were a single library. */
287 lang_statement_header_type header;
288 lang_statement_list_type children;
289 } lang_group_statement_type;
291 typedef union lang_statement_union {
292 lang_statement_header_type header;
293 lang_wild_statement_type wild_statement;
294 lang_data_statement_type data_statement;
295 lang_reloc_statement_type reloc_statement;
296 lang_address_statement_type address_statement;
297 lang_output_section_statement_type output_section_statement;
298 lang_afile_asection_pair_statement_type afile_asection_pair_statement;
299 lang_assignment_statement_type assignment_statement;
300 lang_input_statement_type input_statement;
301 lang_target_statement_type target_statement;
302 lang_output_statement_type output_statement;
303 lang_input_section_type input_section;
304 lang_common_statement_type common_statement;
305 lang_object_symbols_statement_type object_symbols_statement;
306 lang_fill_statement_type fill_statement;
307 lang_padding_statement_type padding_statement;
308 lang_group_statement_type group_statement;
309 } lang_statement_union_type;
311 /* This structure holds information about a program header, from the
312 PHDRS command in the linker script. */
315 struct lang_phdr *next;
324 /* This structure is used to hold a list of sections which may not
325 cross reference each other. */
327 struct lang_nocrossref {
328 struct lang_nocrossref *next;
332 /* The list of nocrossref lists. */
334 struct lang_nocrossrefs {
335 struct lang_nocrossrefs *next;
336 struct lang_nocrossref *list;
339 extern struct lang_nocrossrefs *nocrossref_list;
341 /* This structure is used to hold a list of input section names which
342 will not match an output section in the linker script. */
344 struct unique_sections {
345 struct unique_sections *next;
349 extern struct unique_sections *unique_section_list;
351 extern lang_output_section_statement_type *abs_output_section;
352 extern lang_statement_list_type lang_output_section_statement;
353 extern boolean lang_has_input_file;
354 extern etree_type *base;
355 extern lang_statement_list_type *stat_ptr;
356 extern boolean delete_output_file_on_failure;
358 extern const char *entry_symbol;
359 extern boolean entry_from_cmdline;
360 extern lang_statement_list_type file_chain;
362 extern void lang_init PARAMS ((void));
363 extern struct memory_region_struct *lang_memory_region_lookup
364 PARAMS ((const char *const));
365 extern struct memory_region_struct *lang_memory_region_default
366 PARAMS ((asection *));
367 extern void lang_map PARAMS ((void));
368 extern void lang_set_flags PARAMS ((lang_memory_region_type *, const char *,
370 extern void lang_add_output PARAMS ((const char *, int from_script));
371 extern lang_output_section_statement_type *lang_enter_output_section_statement
372 PARAMS ((const char *output_section_statement_name,
373 etree_type * address_exp,
374 enum section_type sectype,
377 etree_type *subalign,
379 extern void lang_final PARAMS ((void));
380 extern void lang_process PARAMS ((void));
381 extern void lang_section_start PARAMS ((const char *, union etree_union *));
382 extern void lang_add_entry PARAMS ((const char *, boolean));
383 extern void lang_add_target PARAMS ((const char *));
384 extern void lang_add_wild
385 PARAMS ((struct wildcard_spec *, struct wildcard_list *, boolean));
386 extern void lang_add_map PARAMS ((const char *));
387 extern void lang_add_fill PARAMS ((int));
388 extern lang_assignment_statement_type * lang_add_assignment PARAMS ((union etree_union *));
389 extern void lang_add_attribute PARAMS ((enum statement_enum));
390 extern void lang_startup PARAMS ((const char *));
391 extern void lang_float PARAMS ((enum bfd_boolean));
392 extern void lang_leave_output_section_statement
393 PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *,
395 extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *));
396 extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *,
398 extern void lang_statement_append PARAMS ((struct statement_list *,
399 union lang_statement_union *,
400 union lang_statement_union **));
401 extern void lang_for_each_input_file
402 PARAMS ((void (*dothis) (lang_input_statement_type *)));
403 extern void lang_for_each_file
404 PARAMS ((void (*dothis) (lang_input_statement_type *)));
405 extern bfd_vma lang_do_assignments
406 PARAMS ((lang_statement_union_type * s,
407 lang_output_section_statement_type *output_section_statement,
411 #define LANG_FOR_EACH_INPUT_STATEMENT(statement) \
412 lang_input_statement_type *statement; \
413 for (statement = (lang_input_statement_type *)file_chain.head;\
414 statement != (lang_input_statement_type *)NULL; \
415 statement = (lang_input_statement_type *)statement->next)\
417 extern void lang_process PARAMS ((void));
418 extern void ldlang_add_file PARAMS ((lang_input_statement_type *));
419 extern lang_output_section_statement_type *lang_output_section_find
420 PARAMS ((const char * const));
421 extern lang_input_statement_type *lang_add_input_file
422 PARAMS ((const char *name, lang_input_file_enum_type file_type,
423 const char *target));
424 extern void lang_add_keepsyms_file PARAMS ((const char *filename));
425 extern lang_output_section_statement_type *
426 lang_output_section_statement_lookup PARAMS ((const char * const name));
427 extern void ldlang_add_undef PARAMS ((const char *const name));
428 extern void lang_add_output_format PARAMS ((const char *, const char *,
429 const char *, int from_script));
430 extern void lang_list_init PARAMS ((lang_statement_list_type*));
431 extern void lang_add_data PARAMS ((int type, union etree_union *));
432 extern void lang_add_reloc
433 PARAMS ((bfd_reloc_code_real_type reloc, reloc_howto_type *howto,
434 asection *section, const char *name, union etree_union *addend));
435 extern void lang_for_each_statement
436 PARAMS ((void (*func) (lang_statement_union_type *)));
437 extern PTR stat_alloc PARAMS ((size_t size));
438 extern void dprint_statement PARAMS ((lang_statement_union_type *, int));
439 extern bfd_vma lang_size_sections
440 PARAMS ((lang_statement_union_type *s,
441 lang_output_section_statement_type *output_section_statement,
442 lang_statement_union_type **prev, fill_type fill,
443 bfd_vma dot, boolean *relax));
444 extern void lang_enter_group PARAMS ((void));
445 extern void lang_leave_group PARAMS ((void));
446 extern void lang_add_section
447 PARAMS ((lang_statement_list_type *ptr, asection *section,
448 lang_output_section_statement_type *output,
449 lang_input_statement_type *file));
450 extern void lang_new_phdr
451 PARAMS ((const char *, etree_type *, boolean, boolean, etree_type *,
453 extern void lang_add_nocrossref PARAMS ((struct lang_nocrossref *));
454 extern void lang_enter_overlay PARAMS ((etree_type *, etree_type *, int));
455 extern void lang_enter_overlay_section PARAMS ((const char *));
456 extern void lang_leave_overlay_section
457 PARAMS ((bfd_vma, struct lang_output_section_phdr_list *));
458 extern void lang_leave_overlay
459 PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *,
462 extern struct bfd_elf_version_tree *lang_elf_version_info;
464 extern struct bfd_elf_version_expr *lang_new_vers_regex
465 PARAMS ((struct bfd_elf_version_expr *, const char *, const char *));
466 extern struct bfd_elf_version_tree *lang_new_vers_node
467 PARAMS ((struct bfd_elf_version_expr *, struct bfd_elf_version_expr *));
468 extern struct bfd_elf_version_deps *lang_add_vers_depend
469 PARAMS ((struct bfd_elf_version_deps *, const char *));
470 extern void lang_register_vers_node
471 PARAMS ((const char *, struct bfd_elf_version_tree *,
472 struct bfd_elf_version_deps *));
473 boolean unique_section_p PARAMS ((const char *));
474 extern void lang_add_unique PARAMS ((const char *));