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252b5132 | 1 | /* ldlang.h - linker command language support |
aa8804e4 ILT |
2 | Copyright 1991, 92, 93, 94, 95, 96, 97, 98, 1999 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | |
5 | This file is part of GLD, the Gnu Linker. | |
6 | ||
7 | GLD is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 1, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GLD is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GLD; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #ifndef LDLANG_H | |
23 | #define LDLANG_H | |
24 | ||
25 | typedef enum | |
26 | { | |
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; | |
34 | ||
35 | typedef unsigned int fill_type; | |
36 | typedef struct statement_list | |
37 | { | |
38 | union lang_statement_union *head; | |
39 | union lang_statement_union **tail; | |
40 | } lang_statement_list_type; | |
41 | ||
42 | ||
43 | typedef struct memory_region_struct | |
44 | { | |
45 | char *name; | |
46 | struct memory_region_struct *next; | |
47 | bfd_vma origin; | |
48 | bfd_size_type length; | |
49 | bfd_vma current; | |
50 | bfd_size_type old_length; | |
51 | flagword flags; | |
52 | flagword not_flags; | |
53 | boolean had_full_message; | |
54 | } lang_memory_region_type ; | |
55 | ||
56 | typedef struct lang_statement_header_struct | |
57 | { | |
58 | union lang_statement_union *next; | |
59 | enum statement_enum | |
60 | { | |
61 | lang_output_section_statement_enum, | |
62 | lang_assignment_statement_enum, | |
63 | lang_input_statement_enum, | |
64 | lang_address_statement_enum, | |
65 | lang_wild_statement_enum, | |
66 | lang_input_section_enum, | |
67 | lang_object_symbols_statement_enum, | |
68 | lang_fill_statement_enum, | |
69 | lang_data_statement_enum, | |
70 | lang_reloc_statement_enum, | |
71 | lang_target_statement_enum, | |
72 | lang_output_statement_enum, | |
73 | lang_padding_statement_enum, | |
74 | lang_group_statement_enum, | |
75 | ||
76 | lang_afile_asection_pair_statement_enum, | |
77 | lang_constructors_statement_enum | |
78 | } type; | |
79 | } lang_statement_header_type; | |
80 | ||
81 | ||
82 | typedef struct | |
83 | { | |
84 | lang_statement_header_type header; | |
85 | union etree_union *exp; | |
86 | } lang_assignment_statement_type; | |
87 | ||
88 | ||
89 | typedef struct lang_target_statement_struct | |
90 | { | |
91 | lang_statement_header_type header; | |
92 | const char *target; | |
93 | } lang_target_statement_type; | |
94 | ||
95 | ||
96 | typedef struct lang_output_statement_struct | |
97 | { | |
98 | lang_statement_header_type header; | |
99 | const char *name; | |
100 | } lang_output_statement_type; | |
101 | ||
102 | /* Section types specified in a linker script. */ | |
103 | ||
104 | enum section_type | |
105 | { | |
106 | normal_section, | |
107 | dsect_section, | |
108 | copy_section, | |
109 | noload_section, | |
110 | info_section, | |
111 | overlay_section | |
112 | }; | |
113 | ||
114 | /* This structure holds a list of program headers describing segments | |
115 | in which this section should be placed. */ | |
116 | ||
117 | struct lang_output_section_phdr_list | |
118 | { | |
119 | struct lang_output_section_phdr_list *next; | |
120 | const char *name; | |
121 | boolean used; | |
122 | }; | |
123 | ||
124 | typedef struct lang_output_section_statement_struct | |
125 | { | |
126 | lang_statement_header_type header; | |
127 | union etree_union *addr_tree; | |
128 | lang_statement_list_type children; | |
129 | const char *memspec; | |
130 | union lang_statement_union *next; | |
131 | const char *name; | |
132 | ||
133 | boolean processed; | |
134 | ||
135 | asection *bfd_section; | |
136 | flagword flags; /* Or together of all input sections */ | |
137 | enum section_type sectype; | |
138 | struct memory_region_struct *region; | |
139 | size_t block_value; | |
140 | fill_type fill; | |
141 | ||
142 | int subsection_alignment; /* alignment of components */ | |
143 | int section_alignment; /* alignment of start of section */ | |
144 | ||
145 | union etree_union *load_base; | |
146 | ||
147 | struct lang_output_section_phdr_list *phdrs; | |
148 | } lang_output_section_statement_type; | |
149 | ||
150 | ||
151 | typedef struct | |
152 | { | |
153 | lang_statement_header_type header; | |
154 | } lang_common_statement_type; | |
155 | ||
156 | typedef struct | |
157 | { | |
158 | lang_statement_header_type header; | |
159 | } lang_object_symbols_statement_type; | |
160 | ||
161 | typedef struct | |
162 | { | |
163 | lang_statement_header_type header; | |
164 | fill_type fill; | |
165 | int size; | |
166 | asection *output_section; | |
167 | } lang_fill_statement_type; | |
168 | ||
169 | typedef struct | |
170 | { | |
171 | lang_statement_header_type header; | |
172 | unsigned int type; | |
173 | union etree_union *exp; | |
174 | bfd_vma value; | |
175 | asection *output_section; | |
176 | bfd_vma output_vma; | |
177 | } lang_data_statement_type; | |
178 | ||
179 | /* Generate a reloc in the output file. */ | |
180 | ||
181 | typedef struct | |
182 | { | |
183 | lang_statement_header_type header; | |
184 | ||
185 | /* Reloc to generate. */ | |
186 | bfd_reloc_code_real_type reloc; | |
187 | ||
188 | /* Reloc howto structure. */ | |
189 | reloc_howto_type *howto; | |
190 | ||
191 | /* Section to generate reloc against. Exactly one of section and | |
192 | name must be NULL. */ | |
193 | asection *section; | |
194 | ||
195 | /* Name of symbol to generate reloc against. Exactly one of section | |
196 | and name must be NULL. */ | |
197 | const char *name; | |
198 | ||
199 | /* Expression for addend. */ | |
200 | union etree_union *addend_exp; | |
201 | ||
202 | /* Resolved addend. */ | |
203 | bfd_vma addend_value; | |
204 | ||
205 | /* Output section where reloc should be performed. */ | |
206 | asection *output_section; | |
207 | ||
208 | /* VMA within output section. */ | |
209 | bfd_vma output_vma; | |
210 | } lang_reloc_statement_type; | |
211 | ||
212 | typedef struct lang_input_statement_struct | |
213 | { | |
214 | lang_statement_header_type header; | |
215 | /* Name of this file. */ | |
216 | const char *filename; | |
217 | /* Name to use for the symbol giving address of text start */ | |
218 | /* Usually the same as filename, but for a file spec'd with -l | |
219 | this is the -l switch itself rather than the filename. */ | |
220 | const char *local_sym_name; | |
221 | ||
222 | bfd *the_bfd; | |
223 | ||
224 | boolean closed; | |
225 | file_ptr passive_position; | |
226 | ||
227 | /* Symbol table of the file. */ | |
228 | asymbol **asymbols; | |
229 | unsigned int symbol_count; | |
230 | ||
231 | /* Point to the next file - whatever it is, wanders up and down | |
232 | archives */ | |
233 | ||
234 | union lang_statement_union *next; | |
235 | /* Point to the next file, but skips archive contents */ | |
236 | union lang_statement_union *next_real_file; | |
237 | ||
238 | boolean is_archive; | |
239 | ||
240 | /* 1 means search a set of directories for this file. */ | |
241 | boolean search_dirs_flag; | |
242 | ||
243 | /* 1 means this is base file of incremental load. | |
244 | Do not load this file's text or data. | |
245 | Also default text_start to after this file's bss. */ | |
246 | ||
247 | boolean just_syms_flag; | |
248 | ||
249 | /* Whether to search for this entry as a dynamic archive. */ | |
250 | boolean dynamic; | |
251 | ||
252 | /* Whether to include the entire contents of an archive. */ | |
253 | boolean whole_archive; | |
254 | ||
255 | boolean loaded; | |
256 | ||
257 | /* unsigned int globals_in_this_file;*/ | |
258 | const char *target; | |
259 | boolean real; | |
260 | } lang_input_statement_type; | |
261 | ||
262 | typedef struct | |
263 | { | |
264 | lang_statement_header_type header; | |
265 | asection *section; | |
266 | lang_input_statement_type *ifile; | |
267 | ||
268 | } lang_input_section_type; | |
269 | ||
270 | ||
271 | typedef struct | |
272 | { | |
273 | lang_statement_header_type header; | |
274 | asection *section; | |
275 | union lang_statement_union *file; | |
276 | } lang_afile_asection_pair_statement_type; | |
277 | ||
278 | typedef struct lang_wild_statement_struct | |
279 | { | |
280 | lang_statement_header_type header; | |
281 | const char *section_name; | |
282 | boolean sections_sorted; | |
283 | const char *filename; | |
284 | boolean filenames_sorted; | |
285 | boolean keep_sections; | |
286 | const char *exclude_filename; | |
287 | lang_statement_list_type children; | |
288 | } lang_wild_statement_type; | |
289 | ||
290 | typedef struct lang_address_statement_struct | |
291 | { | |
292 | lang_statement_header_type header; | |
293 | const char *section_name; | |
294 | union etree_union *address; | |
295 | } lang_address_statement_type; | |
296 | ||
297 | typedef struct | |
298 | { | |
299 | lang_statement_header_type header; | |
300 | bfd_vma output_offset; | |
301 | size_t size; | |
302 | asection *output_section; | |
303 | fill_type fill; | |
304 | } lang_padding_statement_type; | |
305 | ||
306 | /* A group statement collects a set of libraries together. The | |
307 | libraries are searched multiple times, until no new undefined | |
308 | symbols are found. The effect is to search a group of libraries as | |
309 | though they were a single library. */ | |
310 | ||
311 | typedef struct | |
312 | { | |
313 | lang_statement_header_type header; | |
314 | lang_statement_list_type children; | |
315 | } lang_group_statement_type; | |
316 | ||
317 | typedef union lang_statement_union | |
318 | { | |
319 | lang_statement_header_type header; | |
320 | union lang_statement_union *next; | |
321 | lang_wild_statement_type wild_statement; | |
322 | lang_data_statement_type data_statement; | |
323 | lang_reloc_statement_type reloc_statement; | |
324 | lang_address_statement_type address_statement; | |
325 | lang_output_section_statement_type output_section_statement; | |
326 | lang_afile_asection_pair_statement_type afile_asection_pair_statement; | |
327 | lang_assignment_statement_type assignment_statement; | |
328 | lang_input_statement_type input_statement; | |
329 | lang_target_statement_type target_statement; | |
330 | lang_output_statement_type output_statement; | |
331 | lang_input_section_type input_section; | |
332 | lang_common_statement_type common_statement; | |
333 | lang_object_symbols_statement_type object_symbols_statement; | |
334 | lang_fill_statement_type fill_statement; | |
335 | lang_padding_statement_type padding_statement; | |
336 | lang_group_statement_type group_statement; | |
337 | } lang_statement_union_type; | |
338 | ||
339 | /* This structure holds information about a program header, from the | |
340 | PHDRS command in the linker script. */ | |
341 | ||
342 | struct lang_phdr | |
343 | { | |
344 | struct lang_phdr *next; | |
345 | const char *name; | |
346 | unsigned long type; | |
347 | boolean filehdr; | |
348 | boolean phdrs; | |
349 | etree_type *at; | |
350 | etree_type *flags; | |
351 | }; | |
352 | ||
353 | /* This structure is used to hold a list of sections which may not | |
354 | cross reference each other. */ | |
355 | ||
356 | struct lang_nocrossref | |
357 | { | |
358 | struct lang_nocrossref *next; | |
359 | const char *name; | |
360 | }; | |
361 | ||
362 | /* The list of nocrossref lists. */ | |
363 | ||
364 | struct lang_nocrossrefs | |
365 | { | |
366 | struct lang_nocrossrefs *next; | |
367 | struct lang_nocrossref *list; | |
368 | }; | |
369 | ||
370 | extern struct lang_nocrossrefs *nocrossref_list; | |
371 | ||
372 | extern lang_output_section_statement_type *abs_output_section; | |
373 | extern boolean lang_has_input_file; | |
374 | extern etree_type *base; | |
375 | extern lang_statement_list_type *stat_ptr; | |
376 | extern boolean delete_output_file_on_failure; | |
377 | ||
378 | extern const char *entry_symbol; | |
379 | extern boolean entry_from_cmdline; | |
380 | ||
381 | extern void lang_init PARAMS ((void)); | |
382 | extern struct memory_region_struct *lang_memory_region_lookup | |
383 | PARAMS ((const char *const)); | |
384 | extern struct memory_region_struct *lang_memory_region_default | |
385 | PARAMS ((asection *)); | |
386 | extern void lang_map PARAMS ((void)); | |
aa8804e4 ILT |
387 | extern void lang_set_flags PARAMS ((lang_memory_region_type *, const char *, |
388 | int)); | |
252b5132 RH |
389 | extern void lang_add_output PARAMS ((const char *, int from_script)); |
390 | extern void lang_enter_output_section_statement | |
391 | PARAMS ((const char *output_section_statement_name, | |
392 | etree_type * address_exp, | |
393 | enum section_type sectype, | |
394 | bfd_vma block_value, | |
395 | etree_type *align, | |
396 | etree_type *subalign, | |
397 | etree_type *)); | |
398 | extern void lang_final PARAMS ((void)); | |
399 | extern void lang_process PARAMS ((void)); | |
400 | extern void lang_section_start PARAMS ((const char *, union etree_union *)); | |
401 | extern void lang_add_entry PARAMS ((const char *, boolean)); | |
402 | extern void lang_add_target PARAMS ((const char *)); | |
403 | extern void lang_add_wild | |
404 | PARAMS ((const char *, boolean, const char *, boolean, boolean, const char *)); | |
405 | extern void lang_add_map PARAMS ((const char *)); | |
406 | extern void lang_add_fill PARAMS ((int)); | |
407 | extern lang_assignment_statement_type * lang_add_assignment PARAMS ((union etree_union *)); | |
408 | extern void lang_add_attribute PARAMS ((enum statement_enum)); | |
409 | extern void lang_startup PARAMS ((const char *)); | |
410 | extern void lang_float PARAMS ((enum bfd_boolean)); | |
411 | extern void lang_leave_output_section_statement | |
412 | PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *)); | |
413 | extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *)); | |
414 | extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *, | |
415 | const char *)); | |
416 | extern void lang_statement_append PARAMS ((struct statement_list *, | |
417 | union lang_statement_union *, | |
418 | union lang_statement_union **)); | |
419 | extern void lang_for_each_input_file | |
420 | PARAMS ((void (*dothis) (lang_input_statement_type *))); | |
421 | extern void lang_for_each_file | |
422 | PARAMS ((void (*dothis) (lang_input_statement_type *))); | |
423 | extern bfd_vma lang_do_assignments | |
424 | PARAMS ((lang_statement_union_type * s, | |
425 | lang_output_section_statement_type *output_section_statement, | |
426 | fill_type fill, | |
427 | bfd_vma dot)); | |
428 | ||
429 | #define LANG_FOR_EACH_INPUT_STATEMENT(statement) \ | |
430 | extern lang_statement_list_type file_chain; \ | |
431 | lang_input_statement_type *statement; \ | |
432 | for (statement = (lang_input_statement_type *)file_chain.head;\ | |
433 | statement != (lang_input_statement_type *)NULL; \ | |
434 | statement = (lang_input_statement_type *)statement->next)\ | |
435 | ||
436 | extern void lang_process PARAMS ((void)); | |
437 | extern void ldlang_add_file PARAMS ((lang_input_statement_type *)); | |
438 | extern lang_output_section_statement_type *lang_output_section_find | |
439 | PARAMS ((const char * const)); | |
440 | extern lang_input_statement_type *lang_add_input_file | |
441 | PARAMS ((const char *name, lang_input_file_enum_type file_type, | |
442 | const char *target)); | |
443 | extern void lang_add_keepsyms_file PARAMS ((const char *filename)); | |
444 | extern lang_output_section_statement_type * | |
445 | lang_output_section_statement_lookup PARAMS ((const char * const name)); | |
446 | extern void ldlang_add_undef PARAMS ((const char *const name)); | |
447 | extern void lang_add_output_format PARAMS ((const char *, const char *, | |
448 | const char *, int from_script)); | |
449 | extern void lang_list_init PARAMS ((lang_statement_list_type*)); | |
450 | extern void lang_add_data PARAMS ((int type, union etree_union *)); | |
451 | extern void lang_add_reloc | |
452 | PARAMS ((bfd_reloc_code_real_type reloc, reloc_howto_type *howto, | |
453 | asection *section, const char *name, union etree_union *addend)); | |
454 | extern void lang_for_each_statement | |
455 | PARAMS ((void (*func) (lang_statement_union_type *))); | |
456 | extern PTR stat_alloc PARAMS ((size_t size)); | |
457 | extern void dprint_statement PARAMS ((lang_statement_union_type *, int)); | |
458 | extern bfd_vma lang_size_sections | |
459 | PARAMS ((lang_statement_union_type *s, | |
460 | lang_output_section_statement_type *output_section_statement, | |
461 | lang_statement_union_type **prev, fill_type fill, | |
462 | bfd_vma dot, boolean relax)); | |
463 | extern void lang_enter_group PARAMS ((void)); | |
464 | extern void lang_leave_group PARAMS ((void)); | |
465 | extern void wild_doit | |
466 | PARAMS ((lang_statement_list_type *ptr, asection *section, | |
467 | lang_output_section_statement_type *output, | |
468 | lang_input_statement_type *file)); | |
469 | extern void lang_new_phdr | |
470 | PARAMS ((const char *, etree_type *, boolean, boolean, etree_type *, | |
471 | etree_type *)); | |
472 | extern void lang_add_nocrossref PARAMS ((struct lang_nocrossref *)); | |
473 | extern void lang_enter_overlay PARAMS ((etree_type *, etree_type *, int)); | |
474 | extern void lang_enter_overlay_section PARAMS ((const char *)); | |
475 | extern void lang_leave_overlay_section | |
476 | PARAMS ((bfd_vma, struct lang_output_section_phdr_list *)); | |
477 | extern void lang_leave_overlay | |
478 | PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *)); | |
479 | ||
480 | extern struct bfd_elf_version_tree *lang_elf_version_info; | |
481 | ||
482 | extern struct bfd_elf_version_expr *lang_new_vers_regex | |
483 | PARAMS ((struct bfd_elf_version_expr *, const char *, const char *)); | |
484 | extern struct bfd_elf_version_tree *lang_new_vers_node | |
485 | PARAMS ((struct bfd_elf_version_expr *, struct bfd_elf_version_expr *)); | |
486 | extern struct bfd_elf_version_deps *lang_add_vers_depend | |
487 | PARAMS ((struct bfd_elf_version_deps *, const char *)); | |
488 | extern void lang_register_vers_node | |
489 | PARAMS ((const char *, struct bfd_elf_version_tree *, | |
490 | struct bfd_elf_version_deps *)); | |
491 | ||
492 | #endif |