ld/ldlang.h

   1 /* ldlang.h - linker command language support
   2    Copyright (C) 1991-2022 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_matcher_enum,
  80   lang_input_statement_enum,
  81   lang_insert_statement_enum,
  82   lang_output_section_statement_enum,
  83   lang_output_statement_enum,
  84   lang_padding_statement_enum,
  85   lang_reloc_statement_enum,
  86   lang_target_statement_enum,
  87   lang_wild_statement_enum,
  88   lang_constructors_statement_enum,
  89   lang_object_symbols_statement_enum
  90 };
  91
  92 typedef struct lang_statement_header_struct
  93 {
  94   /* Next pointer for statement_list statement list.  */
  95   union lang_statement_union *next;
  96   enum statement_enum type;
  97 } lang_statement_header_type;
  98
  99 typedef struct
 100 {
 101   lang_statement_header_type header;
 102   union etree_union *exp;
 103 } lang_assignment_statement_type;
 104
 105 typedef struct lang_target_statement_struct
 106 {
 107   lang_statement_header_type header;
 108   const char *target;
 109 } lang_target_statement_type;
 110
 111 typedef struct lang_output_statement_struct
 112 {
 113   lang_statement_header_type header;
 114   const char *name;
 115 } lang_output_statement_type;
 116
 117 /* Section types specified in a linker script.  */
 118
 119 enum section_type
 120 {
 121   normal_section,
 122   first_overlay_section,
 123   overlay_section,
 124   noload_section,
 125   noalloc_section,
 126   type_section,
 127   readonly_section,
 128   typed_readonly_section
 129 };
 130
 131 /* This structure holds a list of program headers describing
 132    segments in which this section should be placed.  */
 133
 134 typedef struct lang_output_section_phdr_list
 135 {
 136   struct lang_output_section_phdr_list *next;
 137   const char *name;
 138   bool used;
 139 } lang_output_section_phdr_list;
 140
 141 typedef struct lang_output_section_statement_struct
 142 {
 143   lang_statement_header_type header;
 144   lang_statement_list_type children;
 145   struct lang_output_section_statement_struct *next;
 146   struct lang_output_section_statement_struct *prev;
 147   const char *name;
 148   asection *bfd_section;
 149   lang_memory_region_type *region;
 150   lang_memory_region_type *lma_region;
 151   fill_type *fill;
 152   union etree_union *addr_tree;
 153   union etree_union *load_base;
 154   union etree_union *section_alignment;
 155   union etree_union *subsection_alignment;
 156
 157   /* If non-null, an expression to evaluate after setting the section's
 158      size.  The expression is evaluated inside REGION (above) with '.'
 159      set to the end of the section.  Used in the last overlay section
 160      to move '.' past all the overlaid sections.  */
 161   union etree_union *update_dot_tree;
 162
 163   lang_output_section_phdr_list *phdrs;
 164
 165   /* Used by ELF SHF_LINK_ORDER sorting.  */
 166   void *data;
 167
 168   unsigned int block_value;
 169   int constraint;
 170   flagword flags;
 171   enum section_type sectype;
 172   etree_type *sectype_value;
 173   unsigned int processed_vma : 1;
 174   unsigned int processed_lma : 1;
 175   unsigned int all_input_readonly : 1;
 176   /* If this section should be ignored.  */
 177   unsigned int ignored : 1;
 178   /* If this section should update "dot".  Prevents section being ignored.  */
 179   unsigned int update_dot : 1;
 180   /* If this section is after assignment to _end.  */
 181   unsigned int after_end : 1;
 182   /* If this section uses the alignment of its input sections.  */
 183   unsigned int align_lma_with_input : 1;
 184   /* If script has duplicate output section statements of the same name
 185      create duplicate output sections.  */
 186   unsigned int dup_output : 1;
 187 } lang_output_section_statement_type;
 188
 189 typedef struct
 190 {
 191   lang_statement_header_type header;
 192   fill_type *fill;
 193   int size;
 194   asection *output_section;
 195 } lang_fill_statement_type;
 196
 197 typedef struct
 198 {
 199   lang_statement_header_type header;
 200   unsigned int type;
 201   union etree_union *exp;
 202   bfd_vma value;
 203   asection *output_section;
 204   bfd_vma output_offset;
 205 } lang_data_statement_type;
 206
 207 /* Generate a reloc in the output file.  */
 208
 209 typedef struct
 210 {
 211   lang_statement_header_type header;
 212
 213   /* Reloc to generate.  */
 214   bfd_reloc_code_real_type reloc;
 215
 216   /* Reloc howto structure.  */
 217   reloc_howto_type *howto;
 218
 219   /* Section to generate reloc against.
 220      Exactly one of section and name must be NULL.  */
 221   asection *section;
 222
 223   /* Name of symbol to generate reloc against.
 224      Exactly one of section and name must be NULL.  */
 225   const char *name;
 226
 227   /* Expression for addend.  */
 228   union etree_union *addend_exp;
 229
 230   /* Resolved addend.  */
 231   bfd_vma addend_value;
 232
 233   /* Output section where reloc should be performed.  */
 234   asection *output_section;
 235
 236   /* Offset within output section.  */
 237   bfd_vma output_offset;
 238 } lang_reloc_statement_type;
 239
 240 struct lang_input_statement_flags
 241 {
 242   /* 1 means this file was specified in a -l option.  */
 243   unsigned int maybe_archive : 1;
 244
 245   /* 1 means this file was specified in a -l:namespec option.  */
 246   unsigned int full_name_provided : 1;
 247
 248   /* 1 means search a set of directories for this file.  */
 249   unsigned int search_dirs : 1;
 250
 251   /* 1 means this was found when processing a script in the sysroot.  */
 252   unsigned int sysrooted : 1;
 253
 254   /* 1 means this is base file of incremental load.
 255      Do not load this file's text or data.
 256      Also default text_start to after this file's bss.  */
 257   unsigned int just_syms : 1;
 258
 259   /* Whether to search for this entry as a dynamic archive.  */
 260   unsigned int dynamic : 1;
 261
 262   /* Set if a DT_NEEDED tag should be added not just for the dynamic library
 263      explicitly given by this entry but also for any dynamic libraries in
 264      this entry's needed list.  */
 265   unsigned int add_DT_NEEDED_for_dynamic : 1;
 266
 267   /* Set if this entry should cause a DT_NEEDED tag only when some
 268      regular file references its symbols (ie. --as-needed is in effect).  */
 269   unsigned int add_DT_NEEDED_for_regular : 1;
 270
 271   /* Whether to include the entire contents of an archive.  */
 272   unsigned int whole_archive : 1;
 273
 274   /* Set when bfd opening is successful.  */
 275   unsigned int loaded : 1;
 276
 277   unsigned int real : 1;
 278
 279   /* Set if the file does not exist.  */
 280   unsigned int missing_file : 1;
 281
 282   /* Set if reloading an archive or --as-needed lib.  */
 283   unsigned int reload : 1;
 284
 285 #if BFD_SUPPORTS_PLUGINS
 286   /* Set if the file was claimed by a plugin.  */
 287   unsigned int claimed : 1;
 288
 289   /* Set if the file was claimed from an archive.  */
 290   unsigned int claim_archive : 1;
 291
 292   /* Set if added by the lto plugin add_input_file callback.  */
 293   unsigned int lto_output : 1;
 294 #endif /* BFD_SUPPORTS_PLUGINS */
 295
 296   /* Head of list of pushed flags.  */
 297   struct lang_input_statement_flags *pushed;
 298 };
 299
 300 typedef struct lang_input_statement_struct
 301 {
 302   lang_statement_header_type header;
 303   /* Name of this file.  */
 304   const char *filename;
 305   /* Name to use for the symbol giving address of text start.
 306      Usually the same as filename, but for a file spec'd with
 307      -l this is the -l switch itself rather than the filename.  */
 308   const char *local_sym_name;
 309   /* Name to use when sorting.  */
 310   const char *sort_key;
 311   /* Extra search path. Used to find a file relative to the
 312      directory of the current linker script.  */
 313   const char *extra_search_path;
 314
 315   bfd *the_bfd;
 316
 317   ctf_archive_t *the_ctf;
 318
 319   struct flag_info *section_flag_list;
 320
 321   /* Next pointer for file_chain statement list.  */
 322   struct lang_input_statement_struct *next;
 323
 324   /* Next pointer for input_file_chain statement list.  */
 325   struct lang_input_statement_struct *next_real_file;
 326
 327   const char *target;
 328
 329   struct lang_input_statement_flags flags;
 330 } lang_input_statement_type;
 331
 332 typedef struct
 333 {
 334   lang_statement_header_type header;
 335   asection *section;
 336   void *pattern;
 337 } lang_input_section_type;
 338
 339 typedef struct
 340 {
 341   lang_statement_header_type header;
 342   asection *section;
 343   void *pattern;
 344   lang_input_statement_type *input_stmt;
 345 } lang_input_matcher_type;
 346
 347 struct map_symbol_def {
 348   struct bfd_link_hash_entry *entry;
 349   struct map_symbol_def *next;
 350 };
 351
 352 /* For input sections, when writing a map file: head / tail of a linked
 353    list of hash table entries for symbols defined in this section.  */
 354 typedef struct input_section_userdata_struct
 355 {
 356   struct map_symbol_def *map_symbol_def_head;
 357   struct map_symbol_def **map_symbol_def_tail;
 358   unsigned long map_symbol_def_count;
 359 } input_section_userdata_type;
 360
 361 static inline bool
 362 bfd_input_just_syms (const bfd *abfd)
 363 {
 364   lang_input_statement_type *is = bfd_usrdata (abfd);
 365   return is != NULL && is->flags.just_syms;
 366 }
 367
 368 typedef struct lang_wild_statement_struct lang_wild_statement_type;
 369
 370 typedef void (*callback_t) (lang_wild_statement_type *, struct wildcard_list *,
 371                             asection *, lang_input_statement_type *, void *);
 372
 373 typedef void (*walk_wild_section_handler_t) (lang_wild_statement_type *,
 374                                              lang_input_statement_type *,
 375                                              callback_t callback,
 376                                              void *data);
 377
 378 typedef bool (*lang_match_sec_type_func) (bfd *, const asection *,
 379                                           bfd *, const asection *);
 380
 381 /* Binary search tree structure to efficiently sort sections by
 382    name.  */
 383 typedef struct lang_section_bst
 384 {
 385   asection *section;
 386   void *pattern;
 387   struct lang_section_bst *left;
 388   struct lang_section_bst *right;
 389 } lang_section_bst_type;
 390
 391 struct lang_wild_statement_struct
 392 {
 393   lang_statement_header_type header;
 394   const char *filename;
 395   bool filenames_sorted;
 396   bool any_specs_sorted;
 397   struct wildcard_list *section_list;
 398   bool keep_sections;
 399   lang_statement_list_type children;
 400   struct name_list *exclude_name_list;
 401   lang_statement_list_type matching_sections;
 402
 403   lang_section_bst_type *tree, **rightmost;
 404   struct flag_info *section_flag_list;
 405 };
 406
 407 typedef struct lang_address_statement_struct
 408 {
 409   lang_statement_header_type header;
 410   const char *section_name;
 411   union etree_union *address;
 412   const segment_type *segment;
 413 } lang_address_statement_type;
 414
 415 typedef struct
 416 {
 417   lang_statement_header_type header;
 418   bfd_vma output_offset;
 419   bfd_size_type size;
 420   asection *output_section;
 421   fill_type *fill;
 422 } lang_padding_statement_type;
 423
 424 /* A group statement collects a set of libraries together.  The
 425    libraries are searched multiple times, until no new undefined
 426    symbols are found.  The effect is to search a group of libraries as
 427    though they were a single library.  */
 428
 429 typedef struct
 430 {
 431   lang_statement_header_type header;
 432   lang_statement_list_type children;
 433 } lang_group_statement_type;
 434
 435 typedef struct
 436 {
 437   lang_statement_header_type header;
 438   const char *where;
 439   bool is_before;
 440 } lang_insert_statement_type;
 441
 442 typedef union lang_statement_union
 443 {
 444   lang_statement_header_type header;
 445   lang_address_statement_type address_statement;
 446   lang_assignment_statement_type assignment_statement;
 447   lang_data_statement_type data_statement;
 448   lang_fill_statement_type fill_statement;
 449   lang_group_statement_type group_statement;
 450   lang_input_section_type input_section;
 451   lang_input_matcher_type input_matcher;
 452   lang_input_statement_type input_statement;
 453   lang_insert_statement_type insert_statement;
 454   lang_output_section_statement_type output_section_statement;
 455   lang_output_statement_type output_statement;
 456   lang_padding_statement_type padding_statement;
 457   lang_reloc_statement_type reloc_statement;
 458   lang_target_statement_type target_statement;
 459   lang_wild_statement_type wild_statement;
 460 } lang_statement_union_type;
 461
 462 /* This structure holds information about a program header, from the
 463    PHDRS command in the linker script.  */
 464
 465 struct lang_phdr
 466 {
 467   struct lang_phdr *next;
 468   const char *name;
 469   unsigned long type;
 470   bool filehdr;
 471   bool phdrs;
 472   etree_type *at;
 473   etree_type *flags;
 474 };
 475
 476 /* This structure is used to hold a list of sections which may not
 477    cross reference each other.  */
 478
 479 typedef struct lang_nocrossref
 480 {
 481   struct lang_nocrossref *next;
 482   const char *name;
 483 } lang_nocrossref_type;
 484
 485 /* The list of nocrossref lists.  */
 486
 487 struct lang_nocrossrefs
 488 {
 489   struct lang_nocrossrefs *next;
 490   lang_nocrossref_type *list;
 491   bool onlyfirst;
 492 };
 493
 494 /* This structure is used to hold a list of input section names which
 495    will not match an output section in the linker script.  */
 496
 497 struct unique_sections
 498 {
 499   struct unique_sections *next;
 500   const char *name;
 501 };
 502
 503 /* Used by place_orphan to keep track of orphan sections and statements.  */
 504
 505 struct orphan_save
 506 {
 507   const char *name;
 508   flagword flags;
 509   lang_output_section_statement_type *os;
 510   asection **section;
 511   lang_statement_union_type **stmt;
 512   lang_output_section_statement_type **os_tail;
 513 };
 514
 515 struct asneeded_minfo
 516 {
 517   struct asneeded_minfo *next;
 518   const char *soname;
 519   bfd *ref;
 520   const char *name;
 521 };
 522
 523 extern struct lang_phdr *lang_phdr_list;
 524 extern struct lang_nocrossrefs *nocrossref_list;
 525 extern const char *output_target;
 526 extern lang_output_section_statement_type *abs_output_section;
 527 extern lang_statement_list_type lang_os_list;
 528 extern struct lang_input_statement_flags input_flags;
 529 extern bool lang_has_input_file;
 530 extern lang_statement_list_type statement_list;
 531 extern lang_statement_list_type *stat_ptr;
 532 extern bool delete_output_file_on_failure;
 533
 534 extern struct bfd_sym_chain entry_symbol;
 535 extern const char *entry_section;
 536 extern bool entry_from_cmdline;
 537 extern lang_statement_list_type file_chain;
 538 extern lang_statement_list_type input_file_chain;
 539
 540 extern struct bfd_elf_dynamic_list **current_dynamic_list_p;
 541
 542 extern int lang_statement_iteration;
 543 extern struct asneeded_minfo **asneeded_list_tail;
 544
 545 extern void (*output_bfd_hash_table_free_fn) (struct bfd_link_hash_table *);
 546
 547 extern void lang_init
 548   (void);
 549 extern void lang_finish
 550   (void);
 551 extern lang_memory_region_type * lang_memory_region_lookup
 552   (const char * const, bool);
 553 extern void lang_memory_region_alias
 554   (const char *, const char *);
 555 extern void lang_map
 556   (void);
 557 extern void lang_set_flags
 558   (lang_memory_region_type *, const char *, int);
 559 extern void lang_add_output
 560   (const char *, int from_script);
 561 extern lang_output_section_statement_type *lang_enter_output_section_statement
 562   (const char *, etree_type *, enum section_type, etree_type *, etree_type *,
 563    etree_type *, etree_type *, int, int);
 564 extern void lang_final
 565   (void);
 566 extern void lang_relax_sections
 567   (bool);
 568 extern void lang_process
 569   (void);
 570 extern void lang_section_start
 571   (const char *, union etree_union *, const segment_type *);
 572 extern void lang_add_entry
 573   (const char *, bool);
 574 extern void lang_default_entry
 575   (const char *);
 576 extern void lang_add_target
 577   (const char *);
 578 extern void lang_add_wild
 579   (struct wildcard_spec *, struct wildcard_list *, bool);
 580 extern void lang_add_map
 581   (const char *);
 582 extern void lang_add_fill
 583   (fill_type *);
 584 extern lang_assignment_statement_type *lang_add_assignment
 585   (union etree_union *);
 586 extern void lang_add_attribute
 587   (enum statement_enum);
 588 extern void lang_startup
 589   (const char *);
 590 extern void lang_float
 591   (bool);
 592 extern void lang_leave_output_section_statement
 593   (fill_type *, const char *, lang_output_section_phdr_list *,
 594    const char *);
 595 extern void lang_for_each_input_file
 596   (void (*dothis) (lang_input_statement_type *));
 597 extern void lang_for_each_file
 598   (void (*dothis) (lang_input_statement_type *));
 599 extern void lang_reset_memory_regions
 600   (void);
 601 extern void lang_do_assignments
 602   (lang_phase_type);
 603 extern asection *section_for_dot
 604   (void);
 605
 606 #define LANG_FOR_EACH_INPUT_STATEMENT(statement)                        \
 607   lang_input_statement_type *statement;                                 \
 608   for (statement = (lang_input_statement_type *) file_chain.head;       \
 609        statement != NULL;                                               \
 610        statement = statement->next)
 611
 612 #define lang_output_section_find(NAME) \
 613   lang_output_section_statement_lookup (NAME, 0, 0)
 614
 615 extern void lang_process
 616   (void);
 617 extern void ldlang_add_file
 618   (lang_input_statement_type *);
 619 extern lang_output_section_statement_type *lang_output_section_find_by_flags
 620   (const asection *, flagword, lang_output_section_statement_type **,
 621    lang_match_sec_type_func);
 622 extern lang_output_section_statement_type *lang_insert_orphan
 623   (asection *, const char *, int, lang_output_section_statement_type *,
 624    struct orphan_save *, etree_type *, lang_statement_list_type *);
 625 extern lang_input_statement_type *lang_add_input_file
 626   (const char *, lang_input_file_enum_type, const char *);
 627 extern void lang_add_keepsyms_file
 628   (const char *);
 629 extern lang_output_section_statement_type *lang_output_section_get
 630   (const asection *);
 631 extern lang_output_section_statement_type *lang_output_section_statement_lookup
 632   (const char *, int, int);
 633 extern lang_output_section_statement_type *next_matching_output_section_statement
 634   (lang_output_section_statement_type *, int);
 635 extern void ldlang_add_undef
 636   (const char *const, bool);
 637 extern void ldlang_add_require_defined
 638   (const char *const);
 639 extern void lang_add_output_format
 640   (const char *, const char *, const char *, int);
 641 extern void lang_list_init
 642   (lang_statement_list_type *);
 643 extern void push_stat_ptr
 644   (lang_statement_list_type *);
 645 extern void pop_stat_ptr
 646   (void);
 647 extern void lang_add_data
 648   (int type, union etree_union *);
 649 extern void lang_add_reloc
 650   (bfd_reloc_code_real_type, reloc_howto_type *, asection *, const char *,
 651    union etree_union *);
 652 extern void lang_for_each_statement
 653   (void (*) (lang_statement_union_type *));
 654 extern void lang_for_each_statement_worker
 655   (void (*) (lang_statement_union_type *), lang_statement_union_type *);
 656 extern void *stat_alloc
 657   (size_t);
 658 extern void strip_excluded_output_sections
 659   (void);
 660 extern void lang_clear_os_map
 661   (void);
 662 extern void dprint_statement
 663   (lang_statement_union_type *, int);
 664 extern void lang_size_sections
 665   (bool *, bool);
 666 extern void one_lang_size_sections_pass
 667   (bool *, bool);
 668 extern void lang_add_insert
 669   (const char *, int);
 670 extern void lang_enter_group
 671   (void);
 672 extern void lang_leave_group
 673   (void);
 674 extern void lang_add_section
 675   (lang_statement_list_type *, asection *, struct wildcard_list *,
 676    struct flag_info *, lang_output_section_statement_type *);
 677 extern void lang_new_phdr
 678   (const char *, etree_type *, bool, bool, etree_type *,
 679    etree_type *);
 680 extern void lang_add_nocrossref
 681   (lang_nocrossref_type *);
 682 extern void lang_add_nocrossref_to
 683   (lang_nocrossref_type *);
 684 extern void lang_enter_overlay
 685   (etree_type *, etree_type *);
 686 extern void lang_enter_overlay_section
 687   (const char *);
 688 extern void lang_leave_overlay_section
 689   (fill_type *, lang_output_section_phdr_list *);
 690 extern void lang_leave_overlay
 691   (etree_type *, int, fill_type *, const char *,
 692    lang_output_section_phdr_list *, const char *);
 693
 694 extern struct bfd_elf_version_expr *lang_new_vers_pattern
 695   (struct bfd_elf_version_expr *, const char *, const char *, bool);
 696 extern struct bfd_elf_version_tree *lang_new_vers_node
 697   (struct bfd_elf_version_expr *, struct bfd_elf_version_expr *);
 698 extern struct bfd_elf_version_deps *lang_add_vers_depend
 699   (struct bfd_elf_version_deps *, const char *);
 700 extern void lang_register_vers_node
 701   (const char *, struct bfd_elf_version_tree *, struct bfd_elf_version_deps *);
 702 extern void lang_append_dynamic_list (struct bfd_elf_dynamic_list **,
 703                                       struct bfd_elf_version_expr *);
 704 extern void lang_append_dynamic_list_cpp_typeinfo (void);
 705 extern void lang_append_dynamic_list_cpp_new (void);
 706 extern void lang_add_unique
 707   (const char *);
 708 extern const char *lang_get_output_target
 709   (void);
 710 extern void add_excluded_libs (const char *);
 711 extern bool load_symbols
 712   (lang_input_statement_type *, lang_statement_list_type *);
 713
 714 struct elf_sym_strtab;
 715 struct elf_strtab_hash;
 716 extern void ldlang_ctf_acquire_strings
 717   (struct elf_strtab_hash *);
 718 extern void ldlang_ctf_new_dynsym
 719   (int symidx, struct elf_internal_sym *);
 720 extern void ldlang_write_ctf_late
 721   (void);
 722 extern bool
 723 ldlang_override_segment_assignment
 724   (struct bfd_link_info *, bfd *, asection *, asection *, bool);
 725
 726 extern void
 727 lang_ld_feature (char *);
 728
 729 extern void
 730 lang_print_memory_usage (void);
 731
 732 extern void
 733 lang_add_gc_name (const char *);
 734
 735 extern bool
 736 print_one_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr);
 737
 738 #endif