ld/ldlang.h

   1 /* ldlang.h - linker command language support
   2    Copyright (C) 1991-2020 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   bfd_boolean 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   bfd_boolean 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   unsigned int block_value;
 162   int constraint;
 163   flagword flags;
 164   enum section_type sectype;
 165   unsigned int processed_vma : 1;
 166   unsigned int processed_lma : 1;
 167   unsigned int all_input_readonly : 1;
 168   /* If this section should be ignored.  */
 169   unsigned int ignored : 1;
 170   /* If this section should update "dot".  Prevents section being ignored.  */
 171   unsigned int update_dot : 1;
 172   /* If this section is after assignment to _end.  */
 173   unsigned int after_end : 1;
 174   /* If this section uses the alignment of its input sections.  */
 175   unsigned int align_lma_with_input : 1;
 176 } lang_output_section_statement_type;
 177
 178 typedef struct
 179 {
 180   lang_statement_header_type header;
 181   fill_type *fill;
 182   int size;
 183   asection *output_section;
 184 } lang_fill_statement_type;
 185
 186 typedef struct
 187 {
 188   lang_statement_header_type header;
 189   unsigned int type;
 190   union etree_union *exp;
 191   bfd_vma value;
 192   asection *output_section;
 193   bfd_vma output_offset;
 194 } lang_data_statement_type;
 195
 196 /* Generate a reloc in the output file.  */
 197
 198 typedef struct
 199 {
 200   lang_statement_header_type header;
 201
 202   /* Reloc to generate.  */
 203   bfd_reloc_code_real_type reloc;
 204
 205   /* Reloc howto structure.  */
 206   reloc_howto_type *howto;
 207
 208   /* Section to generate reloc against.
 209      Exactly one of section and name must be NULL.  */
 210   asection *section;
 211
 212   /* Name of symbol to generate reloc against.
 213      Exactly one of section and name must be NULL.  */
 214   const char *name;
 215
 216   /* Expression for addend.  */
 217   union etree_union *addend_exp;
 218
 219   /* Resolved addend.  */
 220   bfd_vma addend_value;
 221
 222   /* Output section where reloc should be performed.  */
 223   asection *output_section;
 224
 225   /* Offset within output section.  */
 226   bfd_vma output_offset;
 227 } lang_reloc_statement_type;
 228
 229 struct lang_input_statement_flags
 230 {
 231   /* 1 means this file was specified in a -l option.  */
 232   unsigned int maybe_archive : 1;
 233
 234   /* 1 means this file was specified in a -l:namespec option.  */
 235   unsigned int full_name_provided : 1;
 236
 237   /* 1 means search a set of directories for this file.  */
 238   unsigned int search_dirs : 1;
 239
 240   /* 1 means this was found when processing a script in the sysroot.  */
 241   unsigned int sysrooted : 1;
 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   unsigned int just_syms : 1;
 247
 248   /* Whether to search for this entry as a dynamic archive.  */
 249   unsigned int dynamic : 1;
 250
 251   /* Set if a DT_NEEDED tag should be added not just for the dynamic library
 252      explicitly given by this entry but also for any dynamic libraries in
 253      this entry's needed list.  */
 254   unsigned int add_DT_NEEDED_for_dynamic : 1;
 255
 256   /* Set if this entry should cause a DT_NEEDED tag only when some
 257      regular file references its symbols (ie. --as-needed is in effect).  */
 258   unsigned int add_DT_NEEDED_for_regular : 1;
 259
 260   /* Whether to include the entire contents of an archive.  */
 261   unsigned int whole_archive : 1;
 262
 263   /* Set when bfd opening is successful.  */
 264   unsigned int loaded : 1;
 265
 266   unsigned int real : 1;
 267
 268   /* Set if the file does not exist.  */
 269   unsigned int missing_file : 1;
 270
 271   /* Set if reloading an archive or --as-needed lib.  */
 272   unsigned int reload : 1;
 273
 274 #if BFD_SUPPORTS_PLUGINS
 275   /* Set if the file was claimed by a plugin.  */
 276   unsigned int claimed : 1;
 277
 278   /* Set if the file was claimed from an archive.  */
 279   unsigned int claim_archive : 1;
 280
 281   /* Set if added by the lto plugin add_input_file callback.  */
 282   unsigned int lto_output : 1;
 283 #endif /* BFD_SUPPORTS_PLUGINS */
 284
 285   /* Head of list of pushed flags.  */
 286   struct lang_input_statement_flags *pushed;
 287 };
 288
 289 typedef struct lang_input_statement_struct
 290 {
 291   lang_statement_header_type header;
 292   /* Name of this file.  */
 293   const char *filename;
 294   /* Name to use for the symbol giving address of text start.
 295      Usually the same as filename, but for a file spec'd with
 296      -l this is the -l switch itself rather than the filename.  */
 297   const char *local_sym_name;
 298   /* Extra search path. Used to find a file relative to the
 299      directory of the current linker script.  */
 300   const char *extra_search_path;
 301
 302   bfd *the_bfd;
 303
 304   ctf_archive_t *the_ctf;
 305
 306   struct flag_info *section_flag_list;
 307
 308   /* Next pointer for file_chain statement list.  */
 309   struct lang_input_statement_struct *next;
 310
 311   /* Next pointer for input_file_chain statement list.  */
 312   struct lang_input_statement_struct *next_real_file;
 313
 314   const char *target;
 315
 316   struct lang_input_statement_flags flags;
 317 } lang_input_statement_type;
 318
 319 typedef struct
 320 {
 321   lang_statement_header_type header;
 322   asection *section;
 323 } lang_input_section_type;
 324
 325 struct map_symbol_def {
 326   struct bfd_link_hash_entry *entry;
 327   struct map_symbol_def *next;
 328 };
 329
 330 /* For input sections, when writing a map file: head / tail of a linked
 331    list of hash table entries for symbols defined in this section.  */
 332 typedef struct input_section_userdata_struct
 333 {
 334   struct map_symbol_def *map_symbol_def_head;
 335   struct map_symbol_def **map_symbol_def_tail;
 336   unsigned long map_symbol_def_count;
 337 } input_section_userdata_type;
 338
 339 static inline bfd_boolean
 340 bfd_input_just_syms (const bfd *abfd)
 341 {
 342   lang_input_statement_type *is = bfd_usrdata (abfd);
 343   return is != NULL && is->flags.just_syms;
 344 }
 345
 346 typedef struct lang_wild_statement_struct lang_wild_statement_type;
 347
 348 typedef void (*callback_t) (lang_wild_statement_type *, struct wildcard_list *,
 349                             asection *, struct flag_info *,
 350                             lang_input_statement_type *, void *);
 351
 352 typedef void (*walk_wild_section_handler_t) (lang_wild_statement_type *,
 353                                              lang_input_statement_type *,
 354                                              callback_t callback,
 355                                              void *data);
 356
 357 typedef bfd_boolean (*lang_match_sec_type_func) (bfd *, const asection *,
 358                                                  bfd *, const asection *);
 359
 360 /* Binary search tree structure to efficiently sort sections by
 361    name.  */
 362 typedef struct lang_section_bst
 363 {
 364   asection *section;
 365   struct lang_section_bst *left;
 366   struct lang_section_bst *right;
 367 } lang_section_bst_type;
 368
 369 struct lang_wild_statement_struct
 370 {
 371   lang_statement_header_type header;
 372   const char *filename;
 373   bfd_boolean filenames_sorted;
 374   struct wildcard_list *section_list;
 375   bfd_boolean keep_sections;
 376   lang_statement_list_type children;
 377   struct name_list *exclude_name_list;
 378
 379   walk_wild_section_handler_t walk_wild_section_handler;
 380   struct wildcard_list *handler_data[4];
 381   lang_section_bst_type *tree;
 382   struct flag_info *section_flag_list;
 383 };
 384
 385 typedef struct lang_address_statement_struct
 386 {
 387   lang_statement_header_type header;
 388   const char *section_name;
 389   union etree_union *address;
 390   const segment_type *segment;
 391 } lang_address_statement_type;
 392
 393 typedef struct
 394 {
 395   lang_statement_header_type header;
 396   bfd_vma output_offset;
 397   bfd_size_type size;
 398   asection *output_section;
 399   fill_type *fill;
 400 } lang_padding_statement_type;
 401
 402 /* A group statement collects a set of libraries together.  The
 403    libraries are searched multiple times, until no new undefined
 404    symbols are found.  The effect is to search a group of libraries as
 405    though they were a single library.  */
 406
 407 typedef struct
 408 {
 409   lang_statement_header_type header;
 410   lang_statement_list_type children;
 411 } lang_group_statement_type;
 412
 413 typedef struct
 414 {
 415   lang_statement_header_type header;
 416   const char *where;
 417   bfd_boolean is_before;
 418 } lang_insert_statement_type;
 419
 420 typedef union lang_statement_union
 421 {
 422   lang_statement_header_type header;
 423   lang_address_statement_type address_statement;
 424   lang_assignment_statement_type assignment_statement;
 425   lang_data_statement_type data_statement;
 426   lang_fill_statement_type fill_statement;
 427   lang_group_statement_type group_statement;
 428   lang_input_section_type input_section;
 429   lang_input_statement_type input_statement;
 430   lang_insert_statement_type insert_statement;
 431   lang_output_section_statement_type output_section_statement;
 432   lang_output_statement_type output_statement;
 433   lang_padding_statement_type padding_statement;
 434   lang_reloc_statement_type reloc_statement;
 435   lang_target_statement_type target_statement;
 436   lang_wild_statement_type wild_statement;
 437 } lang_statement_union_type;
 438
 439 /* This structure holds information about a program header, from the
 440    PHDRS command in the linker script.  */
 441
 442 struct lang_phdr
 443 {
 444   struct lang_phdr *next;
 445   const char *name;
 446   unsigned long type;
 447   bfd_boolean filehdr;
 448   bfd_boolean phdrs;
 449   etree_type *at;
 450   etree_type *flags;
 451 };
 452
 453 /* This structure is used to hold a list of sections which may not
 454    cross reference each other.  */
 455
 456 typedef struct lang_nocrossref
 457 {
 458   struct lang_nocrossref *next;
 459   const char *name;
 460 } lang_nocrossref_type;
 461
 462 /* The list of nocrossref lists.  */
 463
 464 struct lang_nocrossrefs
 465 {
 466   struct lang_nocrossrefs *next;
 467   lang_nocrossref_type *list;
 468   bfd_boolean onlyfirst;
 469 };
 470
 471 /* This structure is used to hold a list of input section names which
 472    will not match an output section in the linker script.  */
 473
 474 struct unique_sections
 475 {
 476   struct unique_sections *next;
 477   const char *name;
 478 };
 479
 480 /* Used by place_orphan to keep track of orphan sections and statements.  */
 481
 482 struct orphan_save
 483 {
 484   const char *name;
 485   flagword flags;
 486   lang_output_section_statement_type *os;
 487   asection **section;
 488   lang_statement_union_type **stmt;
 489   lang_output_section_statement_type **os_tail;
 490 };
 491
 492 struct asneeded_minfo
 493 {
 494   struct asneeded_minfo *next;
 495   const char *soname;
 496   bfd *ref;
 497   const char *name;
 498 };
 499
 500 extern struct lang_phdr *lang_phdr_list;
 501 extern struct lang_nocrossrefs *nocrossref_list;
 502 extern const char *output_target;
 503 extern lang_output_section_statement_type *abs_output_section;
 504 extern lang_statement_list_type lang_os_list;
 505 extern struct lang_input_statement_flags input_flags;
 506 extern bfd_boolean lang_has_input_file;
 507 extern lang_statement_list_type *stat_ptr;
 508 extern bfd_boolean delete_output_file_on_failure;
 509
 510 extern struct bfd_sym_chain entry_symbol;
 511 extern const char *entry_section;
 512 extern bfd_boolean entry_from_cmdline;
 513 extern lang_statement_list_type file_chain;
 514 extern lang_statement_list_type input_file_chain;
 515
 516 extern struct bfd_elf_dynamic_list **current_dynamic_list_p;
 517
 518 extern int lang_statement_iteration;
 519 extern struct asneeded_minfo **asneeded_list_tail;
 520
 521 extern void (*output_bfd_hash_table_free_fn) (struct bfd_link_hash_table *);
 522
 523 extern void lang_init
 524   (void);
 525 extern void lang_finish
 526   (void);
 527 extern lang_memory_region_type * lang_memory_region_lookup
 528   (const char * const, bfd_boolean);
 529 extern void lang_memory_region_alias
 530   (const char *, const char *);
 531 extern void lang_map
 532   (void);
 533 extern void lang_set_flags
 534   (lang_memory_region_type *, const char *, int);
 535 extern void lang_add_output
 536   (const char *, int from_script);
 537 extern lang_output_section_statement_type *lang_enter_output_section_statement
 538   (const char *, etree_type *, enum section_type, etree_type *, etree_type *,
 539    etree_type *, int, int);
 540 extern void lang_final
 541   (void);
 542 extern void lang_relax_sections
 543   (bfd_boolean);
 544 extern void lang_process
 545   (void);
 546 extern void lang_section_start
 547   (const char *, union etree_union *, const segment_type *);
 548 extern void lang_add_entry
 549   (const char *, bfd_boolean);
 550 extern void lang_default_entry
 551   (const char *);
 552 extern void lang_add_target
 553   (const char *);
 554 extern void lang_add_wild
 555   (struct wildcard_spec *, struct wildcard_list *, bfd_boolean);
 556 extern void lang_add_map
 557   (const char *);
 558 extern void lang_add_fill
 559   (fill_type *);
 560 extern lang_assignment_statement_type *lang_add_assignment
 561   (union etree_union *);
 562 extern void lang_add_attribute
 563   (enum statement_enum);
 564 extern void lang_add_assignment_internal
 565   (lang_statement_list_type *, etree_type *);
 566 extern void lang_add_newdot
 567   (lang_statement_list_type *, bfd_vma);
 568 extern void lang_startup
 569   (const char *);
 570 extern void lang_float
 571   (bfd_boolean);
 572 extern void lang_leave_output_section_statement
 573   (fill_type *, const char *, lang_output_section_phdr_list *,
 574    const char *);
 575 extern void lang_for_each_input_file
 576   (void (*dothis) (lang_input_statement_type *));
 577 extern void lang_for_each_file
 578   (void (*dothis) (lang_input_statement_type *));
 579 extern void lang_reset_memory_regions
 580   (void);
 581 extern void lang_do_assignments
 582   (lang_phase_type);
 583 extern asection *section_for_dot
 584   (void);
 585
 586 #define LANG_FOR_EACH_INPUT_STATEMENT(statement)                        \
 587   lang_input_statement_type *statement;                                 \
 588   for (statement = (lang_input_statement_type *) file_chain.head;       \
 589        statement != NULL;                                               \
 590        statement = statement->next)
 591
 592 #define lang_output_section_find(NAME) \
 593   lang_output_section_statement_lookup (NAME, 0, FALSE)
 594
 595 extern void lang_process
 596   (void);
 597 extern void ldlang_add_file
 598   (lang_input_statement_type *);
 599 extern lang_output_section_statement_type *lang_output_section_find_by_flags
 600   (const asection *, flagword, lang_output_section_statement_type **,
 601    lang_match_sec_type_func);
 602 extern lang_output_section_statement_type *lang_insert_orphan
 603   (asection *, const char *, int, lang_output_section_statement_type *,
 604    struct orphan_save *, etree_type *, lang_statement_list_type *);
 605 extern lang_input_statement_type *lang_add_input_file
 606   (const char *, lang_input_file_enum_type, const char *);
 607 extern void lang_add_keepsyms_file
 608   (const char *);
 609 extern lang_output_section_statement_type *lang_output_section_get
 610   (const asection *);
 611 extern lang_output_section_statement_type *lang_output_section_statement_lookup
 612   (const char *, int, bfd_boolean);
 613 extern lang_output_section_statement_type *next_matching_output_section_statement
 614   (lang_output_section_statement_type *, int);
 615 extern void ldlang_add_undef
 616   (const char *const, bfd_boolean);
 617 extern void ldlang_add_require_defined
 618   (const char *const);
 619 extern void lang_add_output_format
 620   (const char *, const char *, const char *, int);
 621 extern void lang_list_init
 622   (lang_statement_list_type *);
 623 extern void push_stat_ptr
 624   (lang_statement_list_type *);
 625 extern void pop_stat_ptr
 626   (void);
 627 extern void lang_add_data
 628   (int type, union etree_union *);
 629 extern void lang_add_reloc
 630   (bfd_reloc_code_real_type, reloc_howto_type *, asection *, const char *,
 631    union etree_union *);
 632 extern void lang_for_each_statement
 633   (void (*) (lang_statement_union_type *));
 634 extern void lang_for_each_statement_worker
 635   (void (*) (lang_statement_union_type *), lang_statement_union_type *);
 636 extern void *stat_alloc
 637   (size_t);
 638 extern void strip_excluded_output_sections
 639   (void);
 640 extern void lang_clear_os_map
 641   (void);
 642 extern void dprint_statement
 643   (lang_statement_union_type *, int);
 644 extern void lang_size_sections
 645   (bfd_boolean *, bfd_boolean);
 646 extern void one_lang_size_sections_pass
 647   (bfd_boolean *, bfd_boolean);
 648 extern void lang_add_insert
 649   (const char *, int);
 650 extern void lang_enter_group
 651   (void);
 652 extern void lang_leave_group
 653   (void);
 654 extern void lang_add_section
 655   (lang_statement_list_type *, asection *,
 656    struct flag_info *, lang_output_section_statement_type *);
 657 extern void lang_new_phdr
 658   (const char *, etree_type *, bfd_boolean, bfd_boolean, etree_type *,
 659    etree_type *);
 660 extern void lang_add_nocrossref
 661   (lang_nocrossref_type *);
 662 extern void lang_add_nocrossref_to
 663   (lang_nocrossref_type *);
 664 extern void lang_enter_overlay
 665   (etree_type *, etree_type *);
 666 extern void lang_enter_overlay_section
 667   (const char *);
 668 extern void lang_leave_overlay_section
 669   (fill_type *, lang_output_section_phdr_list *);
 670 extern void lang_leave_overlay
 671   (etree_type *, int, fill_type *, const char *,
 672    lang_output_section_phdr_list *, const char *);
 673
 674 extern struct bfd_elf_version_expr *lang_new_vers_pattern
 675   (struct bfd_elf_version_expr *, const char *, const char *, bfd_boolean);
 676 extern struct bfd_elf_version_tree *lang_new_vers_node
 677   (struct bfd_elf_version_expr *, struct bfd_elf_version_expr *);
 678 extern struct bfd_elf_version_deps *lang_add_vers_depend
 679   (struct bfd_elf_version_deps *, const char *);
 680 extern void lang_register_vers_node
 681   (const char *, struct bfd_elf_version_tree *, struct bfd_elf_version_deps *);
 682 extern void lang_append_dynamic_list (struct bfd_elf_dynamic_list **,
 683                                       struct bfd_elf_version_expr *);
 684 extern void lang_append_dynamic_list_cpp_typeinfo (void);
 685 extern void lang_append_dynamic_list_cpp_new (void);
 686 extern void lang_add_unique
 687   (const char *);
 688 extern const char *lang_get_output_target
 689   (void);
 690 extern void add_excluded_libs (const char *);
 691 extern bfd_boolean load_symbols
 692   (lang_input_statement_type *, lang_statement_list_type *);
 693
 694 struct elf_sym_strtab;
 695 struct elf_strtab_hash;
 696 extern void ldlang_ctf_apply_strsym
 697   (struct elf_sym_strtab *, bfd_size_type, struct elf_strtab_hash *);
 698 extern void ldlang_write_ctf_late
 699   (void);
 700 extern bfd_boolean
 701 ldlang_override_segment_assignment
 702   (struct bfd_link_info *, bfd *, asection *, asection *, bfd_boolean);
 703
 704 extern void
 705 lang_ld_feature (char *);
 706
 707 extern void
 708 lang_print_memory_usage (void);
 709
 710 extern void
 711 lang_add_gc_name (const char *);
 712
 713 extern bfd_boolean
 714 print_one_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr);
 715
 716 #endif