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1 | /* ldlang.h - linker command language support |
2 | Copyright 1991, 92, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GLD, the Gnu Linker. | |
5 | ||
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) | |
9 | any later version. | |
10 | ||
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. | |
15 | ||
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 the Free | |
18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
20 | ||
21 | #ifndef LDLANG_H | |
22 | #define LDLANG_H | |
23 | ||
24 | typedef enum | |
25 | { | |
26 | lang_input_file_is_l_enum, | |
27 | lang_input_file_is_symbols_only_enum, | |
28 | lang_input_file_is_marker_enum, | |
29 | lang_input_file_is_fake_enum, | |
30 | lang_input_file_is_search_file_enum, | |
31 | lang_input_file_is_file_enum | |
32 | } lang_input_file_enum_type; | |
33 | ||
34 | typedef unsigned int fill_type; | |
35 | typedef struct statement_list | |
36 | { | |
37 | union lang_statement_union *head; | |
38 | union lang_statement_union **tail; | |
39 | } lang_statement_list_type; | |
40 | ||
41 | ||
42 | typedef struct memory_region_struct | |
43 | { | |
44 | char *name; | |
45 | struct memory_region_struct *next; | |
46 | bfd_vma origin; | |
47 | bfd_size_type length; | |
48 | bfd_vma current; | |
49 | bfd_size_type old_length; | |
50 | flagword flags; | |
51 | flagword not_flags; | |
52 | boolean had_full_message; | |
53 | } lang_memory_region_type ; | |
54 | ||
55 | typedef struct lang_statement_header_struct | |
56 | { | |
57 | union lang_statement_union *next; | |
58 | enum statement_enum | |
59 | { | |
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, | |
74 | ||
75 | lang_afile_asection_pair_statement_enum, | |
76 | lang_constructors_statement_enum | |
77 | } type; | |
78 | } lang_statement_header_type; | |
79 | ||
80 | ||
81 | typedef struct | |
82 | { | |
83 | lang_statement_header_type header; | |
84 | union etree_union *exp; | |
85 | } lang_assignment_statement_type; | |
86 | ||
87 | ||
88 | typedef struct lang_target_statement_struct | |
89 | { | |
90 | lang_statement_header_type header; | |
91 | const char *target; | |
92 | } lang_target_statement_type; | |
93 | ||
94 | ||
95 | typedef struct lang_output_statement_struct | |
96 | { | |
97 | lang_statement_header_type header; | |
98 | const char *name; | |
99 | } lang_output_statement_type; | |
100 | ||
101 | /* Section types specified in a linker script. */ | |
102 | ||
103 | enum section_type | |
104 | { | |
105 | normal_section, | |
106 | dsect_section, | |
107 | copy_section, | |
108 | noload_section, | |
109 | info_section, | |
110 | overlay_section | |
111 | }; | |
112 | ||
113 | /* This structure holds a list of program headers describing segments | |
114 | in which this section should be placed. */ | |
115 | ||
116 | struct lang_output_section_phdr_list | |
117 | { | |
118 | struct lang_output_section_phdr_list *next; | |
119 | const char *name; | |
120 | boolean used; | |
121 | }; | |
122 | ||
123 | typedef struct lang_output_section_statement_struct | |
124 | { | |
125 | lang_statement_header_type header; | |
126 | union etree_union *addr_tree; | |
127 | lang_statement_list_type children; | |
128 | const char *memspec; | |
129 | union lang_statement_union *next; | |
130 | const char *name; | |
131 | ||
132 | boolean processed; | |
133 | ||
134 | asection *bfd_section; | |
135 | flagword flags; /* Or together of all input sections */ | |
136 | enum section_type sectype; | |
137 | struct memory_region_struct *region; | |
138 | size_t block_value; | |
139 | fill_type fill; | |
140 | ||
141 | int subsection_alignment; /* alignment of components */ | |
142 | int section_alignment; /* alignment of start of section */ | |
143 | ||
144 | union etree_union *load_base; | |
145 | ||
146 | struct lang_output_section_phdr_list *phdrs; | |
147 | } lang_output_section_statement_type; | |
148 | ||
149 | ||
150 | typedef struct | |
151 | { | |
152 | lang_statement_header_type header; | |
153 | } lang_common_statement_type; | |
154 | ||
155 | typedef struct | |
156 | { | |
157 | lang_statement_header_type header; | |
158 | } lang_object_symbols_statement_type; | |
159 | ||
160 | typedef struct | |
161 | { | |
162 | lang_statement_header_type header; | |
163 | fill_type fill; | |
164 | int size; | |
165 | asection *output_section; | |
166 | } lang_fill_statement_type; | |
167 | ||
168 | typedef struct | |
169 | { | |
170 | lang_statement_header_type header; | |
171 | unsigned int type; | |
172 | union etree_union *exp; | |
173 | bfd_vma value; | |
174 | asection *output_section; | |
175 | bfd_vma output_vma; | |
176 | } lang_data_statement_type; | |
177 | ||
178 | /* Generate a reloc in the output file. */ | |
179 | ||
180 | typedef struct | |
181 | { | |
182 | lang_statement_header_type header; | |
183 | ||
184 | /* Reloc to generate. */ | |
185 | bfd_reloc_code_real_type reloc; | |
186 | ||
187 | /* Reloc howto structure. */ | |
188 | reloc_howto_type *howto; | |
189 | ||
190 | /* Section to generate reloc against. Exactly one of section and | |
191 | name must be NULL. */ | |
192 | asection *section; | |
193 | ||
194 | /* Name of symbol to generate reloc against. Exactly one of section | |
195 | and name must be NULL. */ | |
196 | const char *name; | |
197 | ||
198 | /* Expression for addend. */ | |
199 | union etree_union *addend_exp; | |
200 | ||
201 | /* Resolved addend. */ | |
202 | bfd_vma addend_value; | |
203 | ||
204 | /* Output section where reloc should be performed. */ | |
205 | asection *output_section; | |
206 | ||
207 | /* VMA within output section. */ | |
208 | bfd_vma output_vma; | |
209 | } lang_reloc_statement_type; | |
210 | ||
211 | typedef struct lang_input_statement_struct | |
212 | { | |
213 | lang_statement_header_type header; | |
214 | /* Name of this file. */ | |
215 | const char *filename; | |
216 | /* Name to use for the symbol giving address of text start */ | |
217 | /* Usually the same as filename, but for a file spec'd with -l | |
218 | this is the -l switch itself rather than the filename. */ | |
219 | const char *local_sym_name; | |
220 | ||
221 | bfd *the_bfd; | |
222 | ||
223 | boolean closed; | |
224 | file_ptr passive_position; | |
225 | ||
226 | /* Symbol table of the file. */ | |
227 | asymbol **asymbols; | |
228 | unsigned int symbol_count; | |
229 | ||
230 | /* Point to the next file - whatever it is, wanders up and down | |
231 | archives */ | |
232 | ||
233 | union lang_statement_union *next; | |
234 | /* Point to the next file, but skips archive contents */ | |
235 | union lang_statement_union *next_real_file; | |
236 | ||
237 | boolean is_archive; | |
238 | ||
239 | /* 1 means search a set of directories for this file. */ | |
240 | boolean search_dirs_flag; | |
241 | ||
242 | /* 1 means this is base file of incremental load. | |
243 | Do not load this file's text or data. | |
244 | Also default text_start to after this file's bss. */ | |
245 | ||
246 | boolean just_syms_flag; | |
247 | ||
248 | /* Whether to search for this entry as a dynamic archive. */ | |
249 | boolean dynamic; | |
250 | ||
251 | /* Whether to include the entire contents of an archive. */ | |
252 | boolean whole_archive; | |
253 | ||
254 | boolean loaded; | |
255 | ||
256 | /* unsigned int globals_in_this_file;*/ | |
257 | const char *target; | |
258 | boolean real; | |
259 | } lang_input_statement_type; | |
260 | ||
261 | typedef struct | |
262 | { | |
263 | lang_statement_header_type header; | |
264 | asection *section; | |
265 | lang_input_statement_type *ifile; | |
266 | ||
267 | } lang_input_section_type; | |
268 | ||
269 | ||
270 | typedef struct | |
271 | { | |
272 | lang_statement_header_type header; | |
273 | asection *section; | |
274 | union lang_statement_union *file; | |
275 | } lang_afile_asection_pair_statement_type; | |
276 | ||
277 | typedef struct lang_wild_statement_struct | |
278 | { | |
279 | lang_statement_header_type header; | |
280 | const char *section_name; | |
281 | boolean sections_sorted; | |
282 | const char *filename; | |
283 | boolean filenames_sorted; | |
284 | boolean keep_sections; | |
285 | const char *exclude_filename; | |
286 | lang_statement_list_type children; | |
287 | } lang_wild_statement_type; | |
288 | ||
289 | typedef struct lang_address_statement_struct | |
290 | { | |
291 | lang_statement_header_type header; | |
292 | const char *section_name; | |
293 | union etree_union *address; | |
294 | } lang_address_statement_type; | |
295 | ||
296 | typedef struct | |
297 | { | |
298 | lang_statement_header_type header; | |
299 | bfd_vma output_offset; | |
300 | size_t size; | |
301 | asection *output_section; | |
302 | fill_type fill; | |
303 | } lang_padding_statement_type; | |
304 | ||
305 | /* A group statement collects a set of libraries together. The | |
306 | libraries are searched multiple times, until no new undefined | |
307 | symbols are found. The effect is to search a group of libraries as | |
308 | though they were a single library. */ | |
309 | ||
310 | typedef struct | |
311 | { | |
312 | lang_statement_header_type header; | |
313 | lang_statement_list_type children; | |
314 | } lang_group_statement_type; | |
315 | ||
316 | typedef union lang_statement_union | |
317 | { | |
318 | lang_statement_header_type header; | |
319 | union lang_statement_union *next; | |
320 | lang_wild_statement_type wild_statement; | |
321 | lang_data_statement_type data_statement; | |
322 | lang_reloc_statement_type reloc_statement; | |
323 | lang_address_statement_type address_statement; | |
324 | lang_output_section_statement_type output_section_statement; | |
325 | lang_afile_asection_pair_statement_type afile_asection_pair_statement; | |
326 | lang_assignment_statement_type assignment_statement; | |
327 | lang_input_statement_type input_statement; | |
328 | lang_target_statement_type target_statement; | |
329 | lang_output_statement_type output_statement; | |
330 | lang_input_section_type input_section; | |
331 | lang_common_statement_type common_statement; | |
332 | lang_object_symbols_statement_type object_symbols_statement; | |
333 | lang_fill_statement_type fill_statement; | |
334 | lang_padding_statement_type padding_statement; | |
335 | lang_group_statement_type group_statement; | |
336 | } lang_statement_union_type; | |
337 | ||
338 | /* This structure holds information about a program header, from the | |
339 | PHDRS command in the linker script. */ | |
340 | ||
341 | struct lang_phdr | |
342 | { | |
343 | struct lang_phdr *next; | |
344 | const char *name; | |
345 | unsigned long type; | |
346 | boolean filehdr; | |
347 | boolean phdrs; | |
348 | etree_type *at; | |
349 | etree_type *flags; | |
350 | }; | |
351 | ||
352 | /* This structure is used to hold a list of sections which may not | |
353 | cross reference each other. */ | |
354 | ||
355 | struct lang_nocrossref | |
356 | { | |
357 | struct lang_nocrossref *next; | |
358 | const char *name; | |
359 | }; | |
360 | ||
361 | /* The list of nocrossref lists. */ | |
362 | ||
363 | struct lang_nocrossrefs | |
364 | { | |
365 | struct lang_nocrossrefs *next; | |
366 | struct lang_nocrossref *list; | |
367 | }; | |
368 | ||
369 | extern struct lang_nocrossrefs *nocrossref_list; | |
370 | ||
371 | extern lang_output_section_statement_type *abs_output_section; | |
372 | extern boolean lang_has_input_file; | |
373 | extern etree_type *base; | |
374 | extern lang_statement_list_type *stat_ptr; | |
375 | extern boolean delete_output_file_on_failure; | |
376 | ||
377 | extern const char *entry_symbol; | |
378 | extern boolean entry_from_cmdline; | |
379 | ||
380 | extern void lang_init PARAMS ((void)); | |
381 | extern struct memory_region_struct *lang_memory_region_lookup | |
382 | PARAMS ((const char *const)); | |
383 | extern struct memory_region_struct *lang_memory_region_default | |
384 | PARAMS ((asection *)); | |
385 | extern void lang_map PARAMS ((void)); | |
386 | extern void lang_set_flags PARAMS ((lang_memory_region_type *, const char *)); | |
387 | extern void lang_add_output PARAMS ((const char *, int from_script)); | |
388 | extern void lang_enter_output_section_statement | |
389 | PARAMS ((const char *output_section_statement_name, | |
390 | etree_type * address_exp, | |
391 | enum section_type sectype, | |
392 | bfd_vma block_value, | |
393 | etree_type *align, | |
394 | etree_type *subalign, | |
395 | etree_type *)); | |
396 | extern void lang_final PARAMS ((void)); | |
397 | extern void lang_process PARAMS ((void)); | |
398 | extern void lang_section_start PARAMS ((const char *, union etree_union *)); | |
399 | extern void lang_add_entry PARAMS ((const char *, boolean)); | |
400 | extern void lang_add_target PARAMS ((const char *)); | |
401 | extern void lang_add_wild | |
402 | PARAMS ((const char *, boolean, const char *, boolean, boolean, const char *)); | |
403 | extern void lang_add_map PARAMS ((const char *)); | |
404 | extern void lang_add_fill PARAMS ((int)); | |
405 | extern lang_assignment_statement_type * lang_add_assignment PARAMS ((union etree_union *)); | |
406 | extern void lang_add_attribute PARAMS ((enum statement_enum)); | |
407 | extern void lang_startup PARAMS ((const char *)); | |
408 | extern void lang_float PARAMS ((enum bfd_boolean)); | |
409 | extern void lang_leave_output_section_statement | |
410 | PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *)); | |
411 | extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *)); | |
412 | extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *, | |
413 | const char *)); | |
414 | extern void lang_statement_append PARAMS ((struct statement_list *, | |
415 | union lang_statement_union *, | |
416 | union lang_statement_union **)); | |
417 | extern void lang_for_each_input_file | |
418 | PARAMS ((void (*dothis) (lang_input_statement_type *))); | |
419 | extern void lang_for_each_file | |
420 | PARAMS ((void (*dothis) (lang_input_statement_type *))); | |
421 | extern bfd_vma lang_do_assignments | |
422 | PARAMS ((lang_statement_union_type * s, | |
423 | lang_output_section_statement_type *output_section_statement, | |
424 | fill_type fill, | |
425 | bfd_vma dot)); | |
426 | ||
427 | #define LANG_FOR_EACH_INPUT_STATEMENT(statement) \ | |
428 | extern lang_statement_list_type file_chain; \ | |
429 | lang_input_statement_type *statement; \ | |
430 | for (statement = (lang_input_statement_type *)file_chain.head;\ | |
431 | statement != (lang_input_statement_type *)NULL; \ | |
432 | statement = (lang_input_statement_type *)statement->next)\ | |
433 | ||
434 | extern void lang_process PARAMS ((void)); | |
435 | extern void ldlang_add_file PARAMS ((lang_input_statement_type *)); | |
436 | extern lang_output_section_statement_type *lang_output_section_find | |
437 | PARAMS ((const char * const)); | |
438 | extern lang_input_statement_type *lang_add_input_file | |
439 | PARAMS ((const char *name, lang_input_file_enum_type file_type, | |
440 | const char *target)); | |
441 | extern void lang_add_keepsyms_file PARAMS ((const char *filename)); | |
442 | extern lang_output_section_statement_type * | |
443 | lang_output_section_statement_lookup PARAMS ((const char * const name)); | |
444 | extern void ldlang_add_undef PARAMS ((const char *const name)); | |
445 | extern void lang_add_output_format PARAMS ((const char *, const char *, | |
446 | const char *, int from_script)); | |
447 | extern void lang_list_init PARAMS ((lang_statement_list_type*)); | |
448 | extern void lang_add_data PARAMS ((int type, union etree_union *)); | |
449 | extern void lang_add_reloc | |
450 | PARAMS ((bfd_reloc_code_real_type reloc, reloc_howto_type *howto, | |
451 | asection *section, const char *name, union etree_union *addend)); | |
452 | extern void lang_for_each_statement | |
453 | PARAMS ((void (*func) (lang_statement_union_type *))); | |
454 | extern PTR stat_alloc PARAMS ((size_t size)); | |
455 | extern void dprint_statement PARAMS ((lang_statement_union_type *, int)); | |
456 | extern bfd_vma lang_size_sections | |
457 | PARAMS ((lang_statement_union_type *s, | |
458 | lang_output_section_statement_type *output_section_statement, | |
459 | lang_statement_union_type **prev, fill_type fill, | |
460 | bfd_vma dot, boolean relax)); | |
461 | extern void lang_enter_group PARAMS ((void)); | |
462 | extern void lang_leave_group PARAMS ((void)); | |
463 | extern void wild_doit | |
464 | PARAMS ((lang_statement_list_type *ptr, asection *section, | |
465 | lang_output_section_statement_type *output, | |
466 | lang_input_statement_type *file)); | |
467 | extern void lang_new_phdr | |
468 | PARAMS ((const char *, etree_type *, boolean, boolean, etree_type *, | |
469 | etree_type *)); | |
470 | extern void lang_add_nocrossref PARAMS ((struct lang_nocrossref *)); | |
471 | extern void lang_enter_overlay PARAMS ((etree_type *, etree_type *, int)); | |
472 | extern void lang_enter_overlay_section PARAMS ((const char *)); | |
473 | extern void lang_leave_overlay_section | |
474 | PARAMS ((bfd_vma, struct lang_output_section_phdr_list *)); | |
475 | extern void lang_leave_overlay | |
476 | PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *)); | |
477 | ||
478 | extern struct bfd_elf_version_tree *lang_elf_version_info; | |
479 | ||
480 | extern struct bfd_elf_version_expr *lang_new_vers_regex | |
481 | PARAMS ((struct bfd_elf_version_expr *, const char *, const char *)); | |
482 | extern struct bfd_elf_version_tree *lang_new_vers_node | |
483 | PARAMS ((struct bfd_elf_version_expr *, struct bfd_elf_version_expr *)); | |
484 | extern struct bfd_elf_version_deps *lang_add_vers_depend | |
485 | PARAMS ((struct bfd_elf_version_deps *, const char *)); | |
486 | extern void lang_register_vers_node | |
487 | PARAMS ((const char *, struct bfd_elf_version_tree *, | |
488 | struct bfd_elf_version_deps *)); | |
489 | ||
490 | #endif |