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