ld/ldlang.h

   1 /* ldlang.h - linker command language support
   2    Copyright (C) 1991-2021 Free Software Foundation, Inc.
   3
   4    This file is part of the GNU Binutils.
   5
   6    This program 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 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program 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 this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21 #ifndef LDLANG_H
  22 #define LDLANG_H
  23
  24 #define DEFAULT_MEMORY_REGION   "*default*"
  25
  26 #define SECTION_NAME_MAP_LENGTH (16)
  27
  28 typedef enum
  29 {
  30   lang_input_file_is_l_enum,
  31   lang_input_file_is_symbols_only_enum,
  32   lang_input_file_is_marker_enum,
  33   lang_input_file_is_fake_enum,
  34   lang_input_file_is_search_file_enum,
  35   lang_input_file_is_file_enum
  36 } lang_input_file_enum_type;
  37
  38 struct _fill_type
  39 {
  40   size_t size;
  41   unsigned char data[1];
  42 };
  43
  44 typedef struct statement_list
  45 {
  46   union lang_statement_union *  head;
  47   union lang_statement_union ** tail;
  48 } lang_statement_list_type;
  49
  50 typedef struct memory_region_name_struct
  51 {
  52   const char * name;
  53   struct memory_region_name_struct * next;
  54 } lang_memory_region_name;
  55
  56 typedef struct memory_region_struct
  57 {
  58   lang_memory_region_name name_list;
  59   struct memory_region_struct *next;
  60   union etree_union *origin_exp;
  61   bfd_vma origin;
  62   bfd_size_type length;
  63   union etree_union *length_exp;
  64   bfd_vma current;
  65   union lang_statement_union *last_os;
  66   flagword flags;
  67   flagword not_flags;
  68   bool had_full_message;
  69 } lang_memory_region_type;
  70
  71 enum statement_enum
  72 {
  73   lang_address_statement_enum,
  74   lang_assignment_statement_enum,
  75   lang_data_statement_enum,
  76   lang_fill_statement_enum,
  77   lang_group_statement_enum,
  78   lang_input_section_enum,
  79   lang_input_statement_enum,
  80   lang_insert_statement_enum,
  81   lang_output_section_statement_enum,
  82   lang_output_statement_enum,
  83   lang_padding_statement_enum,
  84   lang_reloc_statement_enum,
  85   lang_target_statement_enum,
  86   lang_wild_statement_enum,
  87   lang_constructors_statement_enum,
  88   lang_object_symbols_statement_enum
  89 };
  90
  91 typedef struct lang_statement_header_struct
  92 {
  93   /* Next pointer for statement_list statement list.  */
  94   union lang_statement_union *next;
  95   enum statement_enum type;
  96 } lang_statement_header_type;
  97
  98 typedef struct
  99 {
 100   lang_statement_header_type header;
 101   union etree_union *exp;
 102 } lang_assignment_statement_type;
 103
 104 typedef struct lang_target_statement_struct
 105 {
 106   lang_statement_header_type header;
 107   const char *target;
 108 } lang_target_statement_type;
 109
 110 typedef struct lang_output_statement_struct
 111 {
 112   lang_statement_header_type header;
 113   const char *name;
 114 } lang_output_statement_type;
 115
 116 /* Section types specified in a linker script.  */
 117
 118 enum section_type
 119 {
 120   normal_section,
 121   first_overlay_section,
 122   overlay_section,
 123   noload_section,
 124   noalloc_section
 125 };
 126
 127 /* This structure holds a list of program headers describing
 128    segments in which this section should be placed.  */
 129
 130 typedef struct lang_output_section_phdr_list
 131 {
 132   struct lang_output_section_phdr_list *next;
 133   const char *name;
 134   bool used;
 135 } lang_output_section_phdr_list;
 136
 137 typedef struct lang_output_section_statement_struct
 138 {
 139   lang_statement_header_type header;
 140   lang_statement_list_type children;
 141   struct lang_output_section_statement_struct *next;
 142   struct lang_output_section_statement_struct *prev;
 143   const char *name;
 144   asection *bfd_section;
 145   lang_memory_region_type *region;
 146   lang_memory_region_type *lma_region;
 147   fill_type *fill;
 148   union etree_union *addr_tree;
 149   union etree_union *load_base;
 150   union etree_union *section_alignment;
 151   union etree_union *subsection_alignment;
 152
 153   /* If non-null, an expression to evaluate after setting the section's
 154      size.  The expression is evaluated inside REGION (above) with '.'
 155      set to the end of the section.  Used in the last overlay section
 156      to move '.' past all the overlaid sections.  */
 157   union etree_union *update_dot_tree;
 158
 159   lang_output_section_phdr_list *phdrs;
 160
 161   /* Used by ELF SHF_LINK_ORDER sorting.  */
 162   void *data;
 163
 164   unsigned int block_value;
 165   int constraint;
 166   flagword flags;
 167   enum section_type sectype;
 168   unsigned int processed_vma : 1;
 169   unsigned int processed_lma : 1;
 170   unsigned int all_input_readonly : 1;
 171   /* If this section should be ignored.  */
 172   unsigned int ignored : 1;
 173   /* If this section should update "dot".  Prevents section being ignored.  */
 174   unsigned int update_dot : 1;
 175   /* If this section is after assignment to _end.  */
 176   unsigned int after_end : 1;
 177   /* If this section uses the alignment of its input sections.  */
 178   unsigned int align_lma_with_input : 1;
 179   /* If script has duplicate output section statements of the same name
 180      create duplicate output sections.  */
 181   unsigned int dup_output : 1;
 182 } lang_output_section_statement_type;
 183
 184 typedef struct
 185 {
 186   lang_statement_header_type header;
 187   fill_type *fill;
 188   int size;
 189   asection *output_section;
 190 } lang_fill_statement_type;
 191
 192 typedef struct
 193 {
 194   lang_statement_header_type header;
 195   unsigned int type;
 196   union etree_union *exp;
 197   bfd_vma value;
 198   asection *output_section;
 199   bfd_vma output_offset;
 200 } lang_data_statement_type;
 201
 202 /* Generate a reloc in the output file.  */
 203
 204 typedef struct
 205 {
 206   lang_statement_header_type header;
 207
 208   /* Reloc to generate.  */
 209   bfd_reloc_code_real_type reloc;
 210
 211   /* Reloc howto structure.  */
 212   reloc_howto_type *howto;
 213
 214   /* Section to generate reloc against.
 215      Exactly one of section and name must be NULL.  */
 216   asection *section;
 217
 218   /* Name of symbol to generate reloc against.
 219      Exactly one of section and name must be NULL.  */
 220   const char *name;
 221
 222   /* Expression for addend.  */
 223   union etree_union *addend_exp;
 224
 225   /* Resolved addend.  */
 226   bfd_vma addend_value;
 227
 228   /* Output section where reloc should be performed.  */
 229   asection *output_section;
 230
 231   /* Offset within output section.  */
 232   bfd_vma output_offset;
 233 } lang_reloc_statement_type;
 234
 235 struct lang_input_statement_flags
 236 {
 237   /* 1 means this file was specified in a -l option.  */
 238   unsigned int maybe_archive : 1;
 239
 240   /* 1 means this file was specified in a -l:namespec option.  */
 241   unsigned int full_name_provided : 1;
 242
 243   /* 1 means search a set of directories for this file.  */
 244   unsigned int search_dirs : 1;
 245
 246   /* 1 means this was found when processing a script in the sysroot.  */
 247   unsigned int sysrooted : 1;
 248
 249   /* 1 means this is base file of incremental load.
 250      Do not load this file's text or data.
 251      Also default text_start to after this file's bss.  */
 252   unsigned int just_syms : 1;
 253
 254   /* Whether to search for this entry as a dynamic archive.  */
 255   unsigned int dynamic : 1;
 256
 257   /* Set if a DT_NEEDED tag should be added not just for the dynamic library
 258      explicitly given by this entry but also for any dynamic libraries in
 259      this entry's needed list.  */
 260   unsigned int add_DT_NEEDED_for_dynamic : 1;
 261
 262   /* Set if this entry should cause a DT_NEEDED tag only when some
 263      regular file references its symbols (ie. --as-needed is in effect).  */
 264   unsigned int add_DT_NEEDED_for_regular : 1;
 265
 266   /* Whether to include the entire contents of an archive.  */
 267   unsigned int whole_archive : 1;
 268
 269   /* Set when bfd opening is successful.  */
 270   unsigned int loaded : 1;
 271
 272   unsigned int real : 1;
 273
 274   /* Set if the file does not exist.  */
 275   unsigned int missing_file : 1;
 276
 277   /* Set if reloading an archive or --as-needed lib.  */
 278   unsigned int reload : 1;
 279
 280 #if BFD_SUPPORTS_PLUGINS
 281   /* Set if the file was claimed by a plugin.  */
 282   unsigned int claimed : 1;
 283
 284   /* Set if the file was claimed from an archive.  */
 285   unsigned int claim_archive : 1;
 286
 287   /* Set if added by the lto plugin add_input_file callback.  */
 288   unsigned int lto_output : 1;
 289 #endif /* BFD_SUPPORTS_PLUGINS */
 290
 291   /* Head of list of pushed flags.  */
 292   struct lang_input_statement_flags *pushed;
 293 };
 294
 295 typedef struct lang_input_statement_struct
 296 {
 297   lang_statement_header_type header;
 298   /* Name of this file.  */
 299   const char *filename;
 300   /* Name to use for the symbol giving address of text start.
 301      Usually the same as filename, but for a file spec'd with
 302      -l this is the -l switch itself rather than the filename.  */
 303   const char *local_sym_name;
 304   /* Extra search path. Used to find a file relative to the
 305      directory of the current linker script.  */
 306   const char *extra_search_path;
 307
 308   bfd *the_bfd;
 309
 310   ctf_archive_t *the_ctf;
 311
 312   struct flag_info *section_flag_list;
 313
 314   /* Next pointer for file_chain statement list.  */
 315   struct lang_input_statement_struct *next;
 316
 317   /* Next pointer for input_file_chain statement list.  */
 318   struct lang_input_statement_struct *next_real_file;
 319
 320   const char *target;
 321
 322   struct lang_input_statement_flags flags;
 323 } lang_input_statement_type;
 324
 325 typedef struct
 326 {
 327   lang_statement_header_type header;
 328   asection *section;
 329   void *pattern;
 330 } lang_input_section_type;
 331
 332 struct map_symbol_def {
 333   struct bfd_link_hash_entry *entry;
 334   struct map_symbol_def *next;
 335 };
 336
 337 /* For input sections, when writing a map file: head / tail of a linked
 338    list of hash table entries for symbols defined in this section.  */
 339 typedef struct input_section_userdata_struct
 340 {
 341   struct map_symbol_def *map_symbol_def_head;
 342   struct map_symbol_def **map_symbol_def_tail;
 343   unsigned long map_symbol_def_count;
 344 } input_section_userdata_type;
 345
 346 static inline bool
 347 bfd_input_just_syms (const bfd *abfd)
 348 {
 349   lang_input_statement_type *is = bfd_usrdata (abfd);
 350   return is != NULL && is->flags.just_syms;
 351 }
 352
 353 typedef struct lang_wild_statement_struct lang_wild_statement_type;
 354
 355 typedef void (*callback_t) (lang_wild_statement_type *, struct wildcard_list *,
 356                             asection *, lang_input_statement_type *, void *);
 357
 358 typedef void (*walk_wild_section_handler_t) (lang_wild_statement_type *,
 359                                              lang_input_statement_type *,
 360                                              callback_t callback,
 361                                              void *data);
 362
 363 typedef bool (*lang_match_sec_type_func) (bfd *, const asection *,
 364                                           bfd *, const asection *);
 365
 366 /* Binary search tree structure to efficiently sort sections by
 367    name.  */
 368 typedef struct lang_section_bst
 369 {
 370   asection *section;
 371   void *pattern;
 372   struct lang_section_bst *left;
 373   struct lang_section_bst *right;
 374 } lang_section_bst_type;
 375
 376 struct lang_wild_statement_struct
 377 {
 378   lang_statement_header_type header;
 379   const char *filename;
 380   bool filenames_sorted;
 381   struct wildcard_list *section_list;
 382   bool keep_sections;
 383   lang_statement_list_type children;
 384   struct name_list *exclude_name_list;
 385
 386   walk_wild_section_handler_t walk_wild_section_handler;
 387   struct wildcard_list *handler_data[4];
 388   lang_section_bst_type *tree;
 389   struct flag_info *section_flag_list;
 390 };
 391
 392 typedef struct lang_address_statement_struct
 393 {
 394   lang_statement_header_type header;
 395   const char *section_name;
 396   union etree_union *address;
 397   const segment_type *segment;
 398 } lang_address_statement_type;
 399
 400 typedef struct
 401 {
 402   lang_statement_header_type header;
 403   bfd_vma output_offset;
 404   bfd_size_type size;
 405   asection *output_section;
 406   fill_type *fill;
 407 } lang_padding_statement_type;
 408
 409 /* A group statement collects a set of libraries together.  The
 410    libraries are searched multiple times, until no new undefined
 411    symbols are found.  The effect is to search a group of libraries as
 412    though they were a single library.  */
 413
 414 typedef struct
 415 {
 416   lang_statement_header_type header;
 417   lang_statement_list_type children;
 418 } lang_group_statement_type;
 419
 420 typedef struct
 421 {
 422   lang_statement_header_type header;
 423   const char *where;
 424   bool is_before;
 425 } lang_insert_statement_type;
 426
 427 typedef union lang_statement_union
 428 {
 429   lang_statement_header_type header;
 430   lang_address_statement_type address_statement;
 431   lang_assignment_statement_type assignment_statement;
 432   lang_data_statement_type data_statement;
 433   lang_fill_statement_type fill_statement;
 434   lang_group_statement_type group_statement;
 435   lang_input_section_type input_section;
 436   lang_input_statement_type input_statement;
 437   lang_insert_statement_type insert_statement;
 438   lang_output_section_statement_type output_section_statement;
 439   lang_output_statement_type output_statement;
 440   lang_padding_statement_type padding_statement;
 441   lang_reloc_statement_type reloc_statement;
 442   lang_target_statement_type target_statement;
 443   lang_wild_statement_type wild_statement;
 444 } lang_statement_union_type;
 445
 446 /* This structure holds information about a program header, from the
 447    PHDRS command in the linker script.  */
 448
 449 struct lang_phdr
 450 {
 451   struct lang_phdr *next;
 452   const char *name;
 453   unsigned long type;
 454   bool filehdr;
 455   bool phdrs;
 456   etree_type *at;
 457   etree_type *flags;
 458 };
 459
 460 /* This structure is used to hold a list of sections which may not
 461    cross reference each other.  */
 462
 463 typedef struct lang_nocrossref
 464 {
 465   struct lang_nocrossref *next;
 466   const char *name;
 467 } lang_nocrossref_type;
 468
 469 /* The list of nocrossref lists.  */
 470
 471 struct lang_nocrossrefs
 472 {
 473   struct lang_nocrossrefs *next;
 474   lang_nocrossref_type *list;
 475   bool onlyfirst;
 476 };
 477
 478 /* This structure is used to hold a list of input section names which
 479    will not match an output section in the linker script.  */
 480
 481 struct unique_sections
 482 {
 483   struct unique_sections *next;
 484   const char *name;
 485 };
 486
 487 /* Used by place_orphan to keep track of orphan sections and statements.  */
 488
 489 struct orphan_save
 490 {
 491   const char *name;
 492   flagword flags;
 493   lang_output_section_statement_type *os;
 494   asection **section;
 495   lang_statement_union_type **stmt;
 496   lang_output_section_statement_type **os_tail;
 497 };
 498
 499 struct asneeded_minfo
 500 {
 501   struct asneeded_minfo *next;
 502   const char *soname;
 503   bfd *ref;
 504   const char *name;
 505 };
 506
 507 extern struct lang_phdr *lang_phdr_list;
 508 extern struct lang_nocrossrefs *nocrossref_list;
 509 extern const char *output_target;
 510 extern lang_output_section_statement_type *abs_output_section;
 511 extern lang_statement_list_type lang_os_list;
 512 extern struct lang_input_statement_flags input_flags;
 513 extern bool lang_has_input_file;
 514 extern lang_statement_list_type statement_list;
 515 extern lang_statement_list_type *stat_ptr;
 516 extern bool delete_output_file_on_failure;
 517
 518 extern struct bfd_sym_chain entry_symbol;
 519 extern const char *entry_section;
 520 extern bool entry_from_cmdline;
 521 extern lang_statement_list_type file_chain;
 522 extern lang_statement_list_type input_file_chain;
 523
 524 extern struct bfd_elf_dynamic_list **current_dynamic_list_p;
 525
 526 extern int lang_statement_iteration;
 527 extern struct asneeded_minfo **asneeded_list_tail;
 528
 529 extern void (*output_bfd_hash_table_free_fn) (struct bfd_link_hash_table *);
 530
 531 extern void lang_init
 532   (void);
 533 extern void lang_finish
 534   (void);
 535 extern lang_memory_region_type * lang_memory_region_lookup
 536   (const char * const, bool);
 537 extern void lang_memory_region_alias
 538   (const char *, const char *);
 539 extern void lang_map
 540   (void);
 541 extern void lang_set_flags
 542   (lang_memory_region_type *, const char *, int);
 543 extern void lang_add_output
 544   (const char *, int from_script);
 545 extern lang_output_section_statement_type *lang_enter_output_section_statement
 546   (const char *, etree_type *, enum section_type, etree_type *, etree_type *,
 547    etree_type *, int, int);
 548 extern void lang_final
 549   (void);
 550 extern void lang_relax_sections
 551   (bool);
 552 extern void lang_process
 553   (void);
 554 extern void lang_section_start
 555   (const char *, union etree_union *, const segment_type *);
 556 extern void lang_add_entry
 557   (const char *, bool);
 558 extern void lang_default_entry
 559   (const char *);
 560 extern void lang_add_target
 561   (const char *);
 562 extern void lang_add_wild
 563   (struct wildcard_spec *, struct wildcard_list *, bool);
 564 extern void lang_add_map
 565   (const char *);
 566 extern void lang_add_fill
 567   (fill_type *);
 568 extern lang_assignment_statement_type *lang_add_assignment
 569   (union etree_union *);
 570 extern void lang_add_attribute
 571   (enum statement_enum);
 572 extern void lang_startup
 573   (const char *);
 574 extern void lang_float
 575   (bool);
 576 extern void lang_leave_output_section_statement
 577   (fill_type *, const char *, lang_output_section_phdr_list *,
 578    const char *);
 579 extern void lang_for_each_input_file
 580   (void (*dothis) (lang_input_statement_type *));
 581 extern void lang_for_each_file
 582   (void (*dothis) (lang_input_statement_type *));
 583 extern void lang_reset_memory_regions
 584   (void);
 585 extern void lang_do_assignments
 586   (lang_phase_type);
 587 extern asection *section_for_dot
 588   (void);
 589
 590 #define LANG_FOR_EACH_INPUT_STATEMENT(statement)                        \
 591   lang_input_statement_type *statement;                                 \
 592   for (statement = (lang_input_statement_type *) file_chain.head;       \
 593        statement != NULL;                                               \
 594        statement = statement->next)
 595
 596 #define lang_output_section_find(NAME) \
 597   lang_output_section_statement_lookup (NAME, 0, 0)
 598
 599 extern void lang_process
 600   (void);
 601 extern void ldlang_add_file
 602   (lang_input_statement_type *);
 603 extern lang_output_section_statement_type *lang_output_section_find_by_flags
 604   (const asection *, flagword, lang_output_section_statement_type **,
 605    lang_match_sec_type_func);
 606 extern lang_output_section_statement_type *lang_insert_orphan
 607   (asection *, const char *, int, lang_output_section_statement_type *,
 608    struct orphan_save *, etree_type *, lang_statement_list_type *);
 609 extern lang_input_statement_type *lang_add_input_file
 610   (const char *, lang_input_file_enum_type, const char *);
 611 extern void lang_add_keepsyms_file
 612   (const char *);
 613 extern lang_output_section_statement_type *lang_output_section_get
 614   (const asection *);
 615 extern lang_output_section_statement_type *lang_output_section_statement_lookup
 616   (const char *, int, int);
 617 extern lang_output_section_statement_type *next_matching_output_section_statement
 618   (lang_output_section_statement_type *, int);
 619 extern void ldlang_add_undef
 620   (const char *const, bool);
 621 extern void ldlang_add_require_defined
 622   (const char *const);
 623 extern void lang_add_output_format
 624   (const char *, const char *, const char *, int);
 625 extern void lang_list_init
 626   (lang_statement_list_type *);
 627 extern void push_stat_ptr
 628   (lang_statement_list_type *);
 629 extern void pop_stat_ptr
 630   (void);
 631 extern void lang_add_data
 632   (int type, union etree_union *);
 633 extern void lang_add_reloc
 634   (bfd_reloc_code_real_type, reloc_howto_type *, asection *, const char *,
 635    union etree_union *);
 636 extern void lang_for_each_statement
 637   (void (*) (lang_statement_union_type *));
 638 extern void lang_for_each_statement_worker
 639   (void (*) (lang_statement_union_type *), lang_statement_union_type *);
 640 extern void *stat_alloc
 641   (size_t);
 642 extern void strip_excluded_output_sections
 643   (void);
 644 extern void lang_clear_os_map
 645   (void);
 646 extern void dprint_statement
 647   (lang_statement_union_type *, int);
 648 extern void lang_size_sections
 649   (bool *, bool);
 650 extern void one_lang_size_sections_pass
 651   (bool *, bool);
 652 extern void lang_add_insert
 653   (const char *, int);
 654 extern void lang_enter_group
 655   (void);
 656 extern void lang_leave_group
 657   (void);
 658 extern void lang_add_section
 659   (lang_statement_list_type *, asection *, struct wildcard_list *,
 660    struct flag_info *, lang_output_section_statement_type *);
 661 extern void lang_new_phdr
 662   (const char *, etree_type *, bool, bool, etree_type *,
 663    etree_type *);
 664 extern void lang_add_nocrossref
 665   (lang_nocrossref_type *);
 666 extern void lang_add_nocrossref_to
 667   (lang_nocrossref_type *);
 668 extern void lang_enter_overlay
 669   (etree_type *, etree_type *);
 670 extern void lang_enter_overlay_section
 671   (const char *);
 672 extern void lang_leave_overlay_section
 673   (fill_type *, lang_output_section_phdr_list *);
 674 extern void lang_leave_overlay
 675   (etree_type *, int, fill_type *, const char *,
 676    lang_output_section_phdr_list *, const char *);
 677
 678 extern struct bfd_elf_version_expr *lang_new_vers_pattern
 679   (struct bfd_elf_version_expr *, const char *, const char *, bool);
 680 extern struct bfd_elf_version_tree *lang_new_vers_node
 681   (struct bfd_elf_version_expr *, struct bfd_elf_version_expr *);
 682 extern struct bfd_elf_version_deps *lang_add_vers_depend
 683   (struct bfd_elf_version_deps *, const char *);
 684 extern void lang_register_vers_node
 685   (const char *, struct bfd_elf_version_tree *, struct bfd_elf_version_deps *);
 686 extern void lang_append_dynamic_list (struct bfd_elf_dynamic_list **,
 687                                       struct bfd_elf_version_expr *);
 688 extern void lang_append_dynamic_list_cpp_typeinfo (void);
 689 extern void lang_append_dynamic_list_cpp_new (void);
 690 extern void lang_add_unique
 691   (const char *);
 692 extern const char *lang_get_output_target
 693   (void);
 694 extern void add_excluded_libs (const char *);
 695 extern bool load_symbols
 696   (lang_input_statement_type *, lang_statement_list_type *);
 697
 698 struct elf_sym_strtab;
 699 struct elf_strtab_hash;
 700 extern void ldlang_ctf_acquire_strings
 701   (struct elf_strtab_hash *);
 702 extern void ldlang_ctf_new_dynsym
 703   (int symidx, struct elf_internal_sym *);
 704 extern void ldlang_write_ctf_late
 705   (void);
 706 extern bool
 707 ldlang_override_segment_assignment
 708   (struct bfd_link_info *, bfd *, asection *, asection *, bool);
 709
 710 extern void
 711 lang_ld_feature (char *);
 712
 713 extern void
 714 lang_print_memory_usage (void);
 715
 716 extern void
 717 lang_add_gc_name (const char *);
 718
 719 extern bool
 720 print_one_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr);
 721
 722 #endif