| 1 | /* ldlang.h - linker command language support |
| 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 3 | 2001 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GLD, the Gnu Linker. |
| 7 | |
| 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) |
| 11 | any later version. |
| 12 | |
| 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. |
| 17 | |
| 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 |
| 21 | 02111-1307, USA. */ |
| 22 | |
| 23 | #ifndef LDLANG_H |
| 24 | #define LDLANG_H |
| 25 | |
| 26 | typedef enum { |
| 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 | |
| 37 | typedef struct statement_list { |
| 38 | union lang_statement_union *head; |
| 39 | union lang_statement_union **tail; |
| 40 | } lang_statement_list_type; |
| 41 | |
| 42 | typedef struct memory_region_struct { |
| 43 | char *name; |
| 44 | struct memory_region_struct *next; |
| 45 | bfd_vma origin; |
| 46 | bfd_size_type length; |
| 47 | bfd_vma current; |
| 48 | bfd_size_type old_length; |
| 49 | flagword flags; |
| 50 | flagword not_flags; |
| 51 | boolean had_full_message; |
| 52 | } lang_memory_region_type; |
| 53 | |
| 54 | typedef struct lang_statement_header_struct { |
| 55 | union lang_statement_union *next; |
| 56 | enum statement_enum { |
| 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, |
| 71 | |
| 72 | lang_afile_asection_pair_statement_enum, |
| 73 | lang_constructors_statement_enum |
| 74 | } type; |
| 75 | } lang_statement_header_type; |
| 76 | |
| 77 | typedef struct { |
| 78 | lang_statement_header_type header; |
| 79 | union etree_union *exp; |
| 80 | } lang_assignment_statement_type; |
| 81 | |
| 82 | typedef struct lang_target_statement_struct { |
| 83 | lang_statement_header_type header; |
| 84 | const char *target; |
| 85 | } lang_target_statement_type; |
| 86 | |
| 87 | typedef struct lang_output_statement_struct { |
| 88 | lang_statement_header_type header; |
| 89 | const char *name; |
| 90 | } lang_output_statement_type; |
| 91 | |
| 92 | /* Section types specified in a linker script. */ |
| 93 | |
| 94 | enum section_type { |
| 95 | normal_section, |
| 96 | dsect_section, |
| 97 | copy_section, |
| 98 | noload_section, |
| 99 | info_section, |
| 100 | overlay_section |
| 101 | }; |
| 102 | |
| 103 | /* This structure holds a list of program headers describing segments |
| 104 | in which this section should be placed. */ |
| 105 | |
| 106 | struct lang_output_section_phdr_list { |
| 107 | struct lang_output_section_phdr_list *next; |
| 108 | const char *name; |
| 109 | boolean used; |
| 110 | }; |
| 111 | |
| 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; |
| 116 | const char *memspec; |
| 117 | union lang_statement_union *next; |
| 118 | const char *name; |
| 119 | |
| 120 | boolean processed; |
| 121 | |
| 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; |
| 127 | size_t block_value; |
| 128 | fill_type fill; |
| 129 | |
| 130 | int subsection_alignment; /* alignment of components */ |
| 131 | int section_alignment; /* alignment of start of section */ |
| 132 | |
| 133 | union etree_union *load_base; |
| 134 | |
| 135 | struct lang_output_section_phdr_list *phdrs; |
| 136 | } lang_output_section_statement_type; |
| 137 | |
| 138 | typedef struct { |
| 139 | lang_statement_header_type header; |
| 140 | } lang_common_statement_type; |
| 141 | |
| 142 | typedef struct { |
| 143 | lang_statement_header_type header; |
| 144 | } lang_object_symbols_statement_type; |
| 145 | |
| 146 | typedef struct { |
| 147 | lang_statement_header_type header; |
| 148 | fill_type fill; |
| 149 | int size; |
| 150 | asection *output_section; |
| 151 | } lang_fill_statement_type; |
| 152 | |
| 153 | typedef struct { |
| 154 | lang_statement_header_type header; |
| 155 | unsigned int type; |
| 156 | union etree_union *exp; |
| 157 | bfd_vma value; |
| 158 | asection *output_section; |
| 159 | bfd_vma output_vma; |
| 160 | } lang_data_statement_type; |
| 161 | |
| 162 | /* Generate a reloc in the output file. */ |
| 163 | |
| 164 | typedef struct { |
| 165 | lang_statement_header_type header; |
| 166 | |
| 167 | /* Reloc to generate. */ |
| 168 | bfd_reloc_code_real_type reloc; |
| 169 | |
| 170 | /* Reloc howto structure. */ |
| 171 | reloc_howto_type *howto; |
| 172 | |
| 173 | /* Section to generate reloc against. Exactly one of section and |
| 174 | name must be NULL. */ |
| 175 | asection *section; |
| 176 | |
| 177 | /* Name of symbol to generate reloc against. Exactly one of section |
| 178 | and name must be NULL. */ |
| 179 | const char *name; |
| 180 | |
| 181 | /* Expression for addend. */ |
| 182 | union etree_union *addend_exp; |
| 183 | |
| 184 | /* Resolved addend. */ |
| 185 | bfd_vma addend_value; |
| 186 | |
| 187 | /* Output section where reloc should be performed. */ |
| 188 | asection *output_section; |
| 189 | |
| 190 | /* VMA within output section. */ |
| 191 | bfd_vma output_vma; |
| 192 | } lang_reloc_statement_type; |
| 193 | |
| 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; |
| 202 | |
| 203 | bfd *the_bfd; |
| 204 | |
| 205 | boolean closed; |
| 206 | file_ptr passive_position; |
| 207 | |
| 208 | /* Symbol table of the file. */ |
| 209 | asymbol **asymbols; |
| 210 | unsigned int symbol_count; |
| 211 | |
| 212 | /* Point to the next file - whatever it is, wanders up and down |
| 213 | archives */ |
| 214 | |
| 215 | union lang_statement_union *next; |
| 216 | /* Point to the next file, but skips archive contents */ |
| 217 | union lang_statement_union *next_real_file; |
| 218 | |
| 219 | boolean is_archive; |
| 220 | |
| 221 | /* 1 means search a set of directories for this file. */ |
| 222 | boolean search_dirs_flag; |
| 223 | |
| 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. */ |
| 227 | |
| 228 | boolean just_syms_flag; |
| 229 | |
| 230 | /* Whether to search for this entry as a dynamic archive. */ |
| 231 | boolean dynamic; |
| 232 | |
| 233 | /* Whether to include the entire contents of an archive. */ |
| 234 | boolean whole_archive; |
| 235 | |
| 236 | boolean loaded; |
| 237 | |
| 238 | #if 0 |
| 239 | unsigned int globals_in_this_file; |
| 240 | #endif |
| 241 | const char *target; |
| 242 | boolean real; |
| 243 | } lang_input_statement_type; |
| 244 | |
| 245 | typedef struct { |
| 246 | lang_statement_header_type header; |
| 247 | asection *section; |
| 248 | lang_input_statement_type *ifile; |
| 249 | |
| 250 | } lang_input_section_type; |
| 251 | |
| 252 | typedef struct { |
| 253 | lang_statement_header_type header; |
| 254 | asection *section; |
| 255 | union lang_statement_union *file; |
| 256 | } lang_afile_asection_pair_statement_type; |
| 257 | |
| 258 | typedef struct lang_wild_statement_struct { |
| 259 | lang_statement_header_type header; |
| 260 | const char *section_name; |
| 261 | boolean sections_sorted; |
| 262 | const char *filename; |
| 263 | boolean filenames_sorted; |
| 264 | boolean keep_sections; |
| 265 | struct name_list *exclude_filename_list; |
| 266 | lang_statement_list_type children; |
| 267 | } lang_wild_statement_type; |
| 268 | |
| 269 | typedef struct lang_address_statement_struct { |
| 270 | lang_statement_header_type header; |
| 271 | const char *section_name; |
| 272 | union etree_union *address; |
| 273 | } lang_address_statement_type; |
| 274 | |
| 275 | typedef struct { |
| 276 | lang_statement_header_type header; |
| 277 | bfd_vma output_offset; |
| 278 | size_t size; |
| 279 | asection *output_section; |
| 280 | fill_type fill; |
| 281 | } lang_padding_statement_type; |
| 282 | |
| 283 | /* A group statement collects a set of libraries together. The |
| 284 | libraries are searched multiple times, until no new undefined |
| 285 | symbols are found. The effect is to search a group of libraries as |
| 286 | though they were a single library. */ |
| 287 | |
| 288 | typedef struct { |
| 289 | lang_statement_header_type header; |
| 290 | lang_statement_list_type children; |
| 291 | } lang_group_statement_type; |
| 292 | |
| 293 | typedef union lang_statement_union { |
| 294 | lang_statement_header_type header; |
| 295 | union lang_statement_union *next; |
| 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; |
| 313 | |
| 314 | /* This structure holds information about a program header, from the |
| 315 | PHDRS command in the linker script. */ |
| 316 | |
| 317 | struct lang_phdr { |
| 318 | struct lang_phdr *next; |
| 319 | const char *name; |
| 320 | unsigned long type; |
| 321 | boolean filehdr; |
| 322 | boolean phdrs; |
| 323 | etree_type *at; |
| 324 | etree_type *flags; |
| 325 | }; |
| 326 | |
| 327 | /* This structure is used to hold a list of sections which may not |
| 328 | cross reference each other. */ |
| 329 | |
| 330 | struct lang_nocrossref { |
| 331 | struct lang_nocrossref *next; |
| 332 | const char *name; |
| 333 | }; |
| 334 | |
| 335 | /* The list of nocrossref lists. */ |
| 336 | |
| 337 | struct lang_nocrossrefs { |
| 338 | struct lang_nocrossrefs *next; |
| 339 | struct lang_nocrossref *list; |
| 340 | }; |
| 341 | |
| 342 | extern struct lang_nocrossrefs *nocrossref_list; |
| 343 | |
| 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. */ |
| 346 | |
| 347 | struct unique_sections { |
| 348 | struct unique_sections *next; |
| 349 | const char *name; |
| 350 | }; |
| 351 | |
| 352 | extern struct unique_sections *unique_section_list; |
| 353 | |
| 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; |
| 360 | |
| 361 | extern const char *entry_symbol; |
| 362 | extern boolean entry_from_cmdline; |
| 363 | extern lang_statement_list_type file_chain; |
| 364 | |
| 365 | extern void lang_init PARAMS ((void)); |
| 366 | extern struct memory_region_struct *lang_memory_region_lookup |
| 367 | PARAMS ((const char *const)); |
| 368 | extern struct memory_region_struct *lang_memory_region_default |
| 369 | PARAMS ((asection *)); |
| 370 | extern void lang_map PARAMS ((void)); |
| 371 | extern void lang_set_flags PARAMS ((lang_memory_region_type *, const char *, |
| 372 | int)); |
| 373 | extern void lang_add_output PARAMS ((const char *, int from_script)); |
| 374 | extern lang_output_section_statement_type *lang_enter_output_section_statement |
| 375 | PARAMS ((const char *output_section_statement_name, |
| 376 | etree_type * address_exp, |
| 377 | enum section_type sectype, |
| 378 | bfd_vma block_value, |
| 379 | etree_type *align, |
| 380 | etree_type *subalign, |
| 381 | etree_type *)); |
| 382 | extern void lang_final PARAMS ((void)); |
| 383 | extern void lang_process PARAMS ((void)); |
| 384 | extern void lang_section_start PARAMS ((const char *, union etree_union *)); |
| 385 | extern void lang_add_entry PARAMS ((const char *, boolean)); |
| 386 | extern void lang_add_target PARAMS ((const char *)); |
| 387 | extern void lang_add_wild |
| 388 | PARAMS ((const char *, boolean, const char *, boolean, boolean, name_list *)); |
| 389 | extern void lang_add_map PARAMS ((const char *)); |
| 390 | extern void lang_add_fill PARAMS ((int)); |
| 391 | extern lang_assignment_statement_type * lang_add_assignment PARAMS ((union etree_union *)); |
| 392 | extern void lang_add_attribute PARAMS ((enum statement_enum)); |
| 393 | extern void lang_startup PARAMS ((const char *)); |
| 394 | extern void lang_float PARAMS ((enum bfd_boolean)); |
| 395 | extern void lang_leave_output_section_statement |
| 396 | PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *, |
| 397 | const char *)); |
| 398 | extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *)); |
| 399 | extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *, |
| 400 | const char *)); |
| 401 | extern void lang_statement_append PARAMS ((struct statement_list *, |
| 402 | union lang_statement_union *, |
| 403 | union lang_statement_union **)); |
| 404 | extern void lang_for_each_input_file |
| 405 | PARAMS ((void (*dothis) (lang_input_statement_type *))); |
| 406 | extern void lang_for_each_file |
| 407 | PARAMS ((void (*dothis) (lang_input_statement_type *))); |
| 408 | extern bfd_vma lang_do_assignments |
| 409 | PARAMS ((lang_statement_union_type * s, |
| 410 | lang_output_section_statement_type *output_section_statement, |
| 411 | fill_type fill, |
| 412 | bfd_vma dot)); |
| 413 | |
| 414 | #define LANG_FOR_EACH_INPUT_STATEMENT(statement) \ |
| 415 | lang_input_statement_type *statement; \ |
| 416 | for (statement = (lang_input_statement_type *)file_chain.head;\ |
| 417 | statement != (lang_input_statement_type *)NULL; \ |
| 418 | statement = (lang_input_statement_type *)statement->next)\ |
| 419 | |
| 420 | extern void lang_process PARAMS ((void)); |
| 421 | extern void ldlang_add_file PARAMS ((lang_input_statement_type *)); |
| 422 | extern lang_output_section_statement_type *lang_output_section_find |
| 423 | PARAMS ((const char * const)); |
| 424 | extern lang_input_statement_type *lang_add_input_file |
| 425 | PARAMS ((const char *name, lang_input_file_enum_type file_type, |
| 426 | const char *target)); |
| 427 | extern void lang_add_keepsyms_file PARAMS ((const char *filename)); |
| 428 | extern lang_output_section_statement_type * |
| 429 | lang_output_section_statement_lookup PARAMS ((const char * const name)); |
| 430 | extern void ldlang_add_undef PARAMS ((const char *const name)); |
| 431 | extern void lang_add_output_format PARAMS ((const char *, const char *, |
| 432 | const char *, int from_script)); |
| 433 | extern void lang_list_init PARAMS ((lang_statement_list_type*)); |
| 434 | extern void lang_add_data PARAMS ((int type, union etree_union *)); |
| 435 | extern void lang_add_reloc |
| 436 | PARAMS ((bfd_reloc_code_real_type reloc, reloc_howto_type *howto, |
| 437 | asection *section, const char *name, union etree_union *addend)); |
| 438 | extern void lang_for_each_statement |
| 439 | PARAMS ((void (*func) (lang_statement_union_type *))); |
| 440 | extern PTR stat_alloc PARAMS ((size_t size)); |
| 441 | extern void dprint_statement PARAMS ((lang_statement_union_type *, int)); |
| 442 | extern bfd_vma lang_size_sections |
| 443 | PARAMS ((lang_statement_union_type *s, |
| 444 | lang_output_section_statement_type *output_section_statement, |
| 445 | lang_statement_union_type **prev, fill_type fill, |
| 446 | bfd_vma dot, boolean relax)); |
| 447 | extern void lang_enter_group PARAMS ((void)); |
| 448 | extern void lang_leave_group PARAMS ((void)); |
| 449 | extern void wild_doit |
| 450 | PARAMS ((lang_statement_list_type *ptr, asection *section, |
| 451 | lang_output_section_statement_type *output, |
| 452 | lang_input_statement_type *file)); |
| 453 | extern void lang_new_phdr |
| 454 | PARAMS ((const char *, etree_type *, boolean, boolean, etree_type *, |
| 455 | etree_type *)); |
| 456 | extern void lang_add_nocrossref PARAMS ((struct lang_nocrossref *)); |
| 457 | extern void lang_enter_overlay PARAMS ((etree_type *, etree_type *, int)); |
| 458 | extern void lang_enter_overlay_section PARAMS ((const char *)); |
| 459 | extern void lang_leave_overlay_section |
| 460 | PARAMS ((bfd_vma, struct lang_output_section_phdr_list *)); |
| 461 | extern void lang_leave_overlay |
| 462 | PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *, |
| 463 | const char *)); |
| 464 | |
| 465 | extern struct bfd_elf_version_tree *lang_elf_version_info; |
| 466 | |
| 467 | extern struct bfd_elf_version_expr *lang_new_vers_regex |
| 468 | PARAMS ((struct bfd_elf_version_expr *, const char *, const char *)); |
| 469 | extern struct bfd_elf_version_tree *lang_new_vers_node |
| 470 | PARAMS ((struct bfd_elf_version_expr *, struct bfd_elf_version_expr *)); |
| 471 | extern struct bfd_elf_version_deps *lang_add_vers_depend |
| 472 | PARAMS ((struct bfd_elf_version_deps *, const char *)); |
| 473 | extern void lang_register_vers_node |
| 474 | PARAMS ((const char *, struct bfd_elf_version_tree *, |
| 475 | struct bfd_elf_version_deps *)); |
| 476 | boolean unique_section_p PARAMS ((const char *)); |
| 477 | extern void lang_add_unique PARAMS ((const char *)); |
| 478 | |
| 479 | #endif |