bfd/mach-o.h

   1 /* Mach-O support for BFD.
   2    Copyright (C) 1999-2014 Free Software Foundation, Inc.
   3
   4    This file is part of BFD, the Binary File Descriptor library.
   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 _BFD_MACH_O_H_
  22 #define _BFD_MACH_O_H_
  23
  24 #include "bfd.h"
  25 #include "mach-o/loader.h"
  26
  27 typedef struct bfd_mach_o_header
  28 {
  29   unsigned long magic;
  30   unsigned long cputype;
  31   unsigned long cpusubtype;
  32   unsigned long filetype;
  33   unsigned long ncmds;
  34   unsigned long sizeofcmds;
  35   unsigned long flags;
  36   unsigned int reserved;
  37   /* Version 1: 32 bits, version 2: 64 bits.  */
  38   unsigned int version;
  39   enum bfd_endian byteorder;
  40 }
  41 bfd_mach_o_header;
  42
  43 typedef struct bfd_mach_o_asymbol
  44 {
  45   /* The actual symbol which the rest of BFD works with.  */
  46   asymbol symbol;
  47
  48   /* Mach-O symbol fields.  */
  49   unsigned char n_type;
  50   unsigned char n_sect;
  51   unsigned short n_desc;
  52 }
  53 bfd_mach_o_asymbol;
  54
  55 #define BFD_MACH_O_SEGNAME_SIZE 16
  56 #define BFD_MACH_O_SECTNAME_SIZE 16
  57
  58 typedef struct bfd_mach_o_section
  59 {
  60   /* Fields present in the file.  */
  61   char sectname[BFD_MACH_O_SECTNAME_SIZE + 1];  /* Always NUL padded.  */
  62   char segname[BFD_MACH_O_SEGNAME_SIZE + 1];
  63   bfd_vma addr;
  64   bfd_vma size;
  65   bfd_vma offset;
  66   unsigned long align;
  67   bfd_vma reloff;
  68   unsigned long nreloc;
  69   unsigned long flags;
  70   unsigned long reserved1;
  71   unsigned long reserved2;
  72   unsigned long reserved3;
  73
  74   /* Corresponding bfd section.  */
  75   asection *bfdsection;
  76
  77   /* An array holding the indirect symbols for this section.
  78      NULL values indicate local symbols.
  79      The number of symbols is determined from the section size and type.  */
  80
  81   bfd_mach_o_asymbol **indirect_syms;
  82
  83   /* Simply linked list.  */
  84   struct bfd_mach_o_section *next;
  85 }
  86 bfd_mach_o_section;
  87
  88 typedef struct bfd_mach_o_segment_command
  89 {
  90   char segname[BFD_MACH_O_SEGNAME_SIZE + 1];
  91   bfd_vma vmaddr;
  92   bfd_vma vmsize;
  93   bfd_vma fileoff;
  94   unsigned long filesize;
  95   unsigned long maxprot;        /* Maximum permitted protection.  */
  96   unsigned long initprot;       /* Initial protection.  */
  97   unsigned long nsects;
  98   unsigned long flags;
  99
 100   /* Linked list of sections.  */
 101   bfd_mach_o_section *sect_head;
 102   bfd_mach_o_section *sect_tail;
 103 }
 104 bfd_mach_o_segment_command;
 105
 106 /* Protection flags.  */
 107 #define BFD_MACH_O_PROT_READ    0x01
 108 #define BFD_MACH_O_PROT_WRITE   0x02
 109 #define BFD_MACH_O_PROT_EXECUTE 0x04
 110
 111 /* Expanded internal representation of a relocation entry.  */
 112 typedef struct bfd_mach_o_reloc_info
 113 {
 114   bfd_vma r_address;
 115   bfd_vma r_value;
 116   unsigned int r_scattered : 1;
 117   unsigned int r_type : 4;
 118   unsigned int r_pcrel : 1;
 119   unsigned int r_length : 2;
 120   unsigned int r_extern : 1;
 121 }
 122 bfd_mach_o_reloc_info;
 123
 124 /* The symbol table is sorted like this:
 125  (1) local.
 126         (otherwise in order of generation)
 127  (2) external defined
 128         (sorted by name)
 129  (3) external undefined / common
 130         (sorted by name)
 131 */
 132
 133 typedef struct bfd_mach_o_symtab_command
 134 {
 135   unsigned int symoff;
 136   unsigned int nsyms;
 137   unsigned int stroff;
 138   unsigned int strsize;
 139   bfd_mach_o_asymbol *symbols;
 140   char *strtab;
 141 }
 142 bfd_mach_o_symtab_command;
 143
 144 /* This is the second set of the symbolic information which is used to support
 145    the data structures for the dynamically link editor.
 146
 147    The original set of symbolic information in the symtab_command which contains
 148    the symbol and string tables must also be present when this load command is
 149    present.  When this load command is present the symbol table is organized
 150    into three groups of symbols:
 151        local symbols (static and debugging symbols) - grouped by module
 152        defined external symbols - grouped by module (sorted by name if not lib)
 153        undefined external symbols (sorted by name)
 154    In this load command there are offsets and counts to each of the three groups
 155    of symbols.
 156
 157    This load command contains a the offsets and sizes of the following new
 158    symbolic information tables:
 159        table of contents
 160        module table
 161        reference symbol table
 162        indirect symbol table
 163    The first three tables above (the table of contents, module table and
 164    reference symbol table) are only present if the file is a dynamically linked
 165    shared library.  For executable and object modules, which are files
 166    containing only one module, the information that would be in these three
 167    tables is determined as follows:
 168        table of contents - the defined external symbols are sorted by name
 169        module table - the file contains only one module so everything in the
 170                       file is part of the module.
 171        reference symbol table - is the defined and undefined external symbols
 172
 173    For dynamically linked shared library files this load command also contains
 174    offsets and sizes to the pool of relocation entries for all sections
 175    separated into two groups:
 176        external relocation entries
 177        local relocation entries
 178    For executable and object modules the relocation entries continue to hang
 179    off the section structures.  */
 180
 181 typedef struct bfd_mach_o_dylib_module
 182 {
 183   /* Index into the string table indicating the name of the module.  */
 184   unsigned long module_name_idx;
 185   char *module_name;
 186
 187   /* Index into the symbol table of the first defined external symbol provided
 188      by the module.  */
 189   unsigned long iextdefsym;
 190
 191   /* Number of external symbols provided by this module.  */
 192   unsigned long nextdefsym;
 193
 194   /* Index into the external reference table of the first entry
 195      provided by this module.  */
 196   unsigned long irefsym;
 197
 198   /* Number of external reference entries provided by this module.  */
 199   unsigned long nrefsym;
 200
 201   /* Index into the symbol table of the first local symbol provided by this
 202      module.  */
 203   unsigned long ilocalsym;
 204
 205   /* Number of local symbols provided by this module.  */
 206   unsigned long nlocalsym;
 207
 208   /* Index into the external relocation table of the first entry provided
 209      by this module.  */
 210   unsigned long iextrel;
 211
 212   /* Number of external relocation entries provided by this module.  */
 213   unsigned long nextrel;
 214
 215   /* Index in the module initialization section to the pointers for this
 216      module.  */
 217   unsigned short iinit;
 218
 219   /* Index in the module termination section to the pointers for this
 220      module.  */
 221   unsigned short iterm;
 222
 223   /* Number of pointers in the module initialization for this module.  */
 224   unsigned short ninit;
 225
 226   /* Number of pointers in the module termination for this module.  */
 227   unsigned short nterm;
 228
 229   /* Number of data byte for this module that are used in the __module_info
 230      section of the __OBJC segment.  */
 231   unsigned long objc_module_info_size;
 232
 233   /* Statically linked address of the start of the data for this module
 234      in the __module_info section of the __OBJC_segment.  */
 235   bfd_vma objc_module_info_addr;
 236 }
 237 bfd_mach_o_dylib_module;
 238
 239 typedef struct bfd_mach_o_dylib_table_of_content
 240 {
 241   /* Index into the symbol table to the defined external symbol.  */
 242   unsigned long symbol_index;
 243
 244   /* Index into the module table to the module for this entry.  */
 245   unsigned long module_index;
 246 }
 247 bfd_mach_o_dylib_table_of_content;
 248
 249 typedef struct bfd_mach_o_dylib_reference
 250 {
 251   /* Index into the symbol table for the symbol being referenced.  */
 252   unsigned long isym;
 253
 254   /* Type of the reference being made (use REFERENCE_FLAGS constants).  */
 255   unsigned long flags;
 256 }
 257 bfd_mach_o_dylib_reference;
 258 #define BFD_MACH_O_REFERENCE_SIZE 4
 259
 260 typedef struct bfd_mach_o_dysymtab_command
 261 {
 262   /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
 263      are grouped into the following three groups:
 264        local symbols (further grouped by the module they are from)
 265        defined external symbols (further grouped by the module they are from)
 266        undefined symbols
 267
 268      The local symbols are used only for debugging.  The dynamic binding
 269      process may have to use them to indicate to the debugger the local
 270      symbols for a module that is being bound.
 271
 272      The last two groups are used by the dynamic binding process to do the
 273      binding (indirectly through the module table and the reference symbol
 274      table when this is a dynamically linked shared library file).  */
 275
 276   unsigned long ilocalsym;    /* Index to local symbols.  */
 277   unsigned long nlocalsym;    /* Number of local symbols.  */
 278   unsigned long iextdefsym;   /* Index to externally defined symbols.  */
 279   unsigned long nextdefsym;   /* Number of externally defined symbols.  */
 280   unsigned long iundefsym;    /* Index to undefined symbols.  */
 281   unsigned long nundefsym;    /* Number of undefined symbols.  */
 282
 283   /* For the for the dynamic binding process to find which module a symbol
 284      is defined in the table of contents is used (analogous to the ranlib
 285      structure in an archive) which maps defined external symbols to modules
 286      they are defined in.  This exists only in a dynamically linked shared
 287      library file.  For executable and object modules the defined external
 288      symbols are sorted by name and is use as the table of contents.  */
 289
 290   unsigned long tocoff;       /* File offset to table of contents.  */
 291   unsigned long ntoc;         /* Number of entries in table of contents.  */
 292
 293   /* To support dynamic binding of "modules" (whole object files) the symbol
 294      table must reflect the modules that the file was created from.  This is
 295      done by having a module table that has indexes and counts into the merged
 296      tables for each module.  The module structure that these two entries
 297      refer to is described below.  This exists only in a dynamically linked
 298      shared library file.  For executable and object modules the file only
 299      contains one module so everything in the file belongs to the module.  */
 300
 301   unsigned long modtaboff;    /* File offset to module table.  */
 302   unsigned long nmodtab;      /* Number of module table entries.  */
 303
 304   /* To support dynamic module binding the module structure for each module
 305      indicates the external references (defined and undefined) each module
 306      makes.  For each module there is an offset and a count into the
 307      reference symbol table for the symbols that the module references.
 308      This exists only in a dynamically linked shared library file.  For
 309      executable and object modules the defined external symbols and the
 310      undefined external symbols indicates the external references.  */
 311
 312   unsigned long extrefsymoff;  /* Offset to referenced symbol table.  */
 313   unsigned long nextrefsyms;   /* Number of referenced symbol table entries.  */
 314
 315   /* The sections that contain "symbol pointers" and "routine stubs" have
 316      indexes and (implied counts based on the size of the section and fixed
 317      size of the entry) into the "indirect symbol" table for each pointer
 318      and stub.  For every section of these two types the index into the
 319      indirect symbol table is stored in the section header in the field
 320      reserved1.  An indirect symbol table entry is simply a 32bit index into
 321      the symbol table to the symbol that the pointer or stub is referring to.
 322      The indirect symbol table is ordered to match the entries in the section.  */
 323
 324   unsigned long indirectsymoff; /* File offset to the indirect symbol table.  */
 325   unsigned long nindirectsyms;  /* Number of indirect symbol table entries.  */
 326
 327   /* To support relocating an individual module in a library file quickly the
 328      external relocation entries for each module in the library need to be
 329      accessed efficiently.  Since the relocation entries can't be accessed
 330      through the section headers for a library file they are separated into
 331      groups of local and external entries further grouped by module.  In this
 332      case the presents of this load command who's extreloff, nextrel,
 333      locreloff and nlocrel fields are non-zero indicates that the relocation
 334      entries of non-merged sections are not referenced through the section
 335      structures (and the reloff and nreloc fields in the section headers are
 336      set to zero).
 337
 338      Since the relocation entries are not accessed through the section headers
 339      this requires the r_address field to be something other than a section
 340      offset to identify the item to be relocated.  In this case r_address is
 341      set to the offset from the vmaddr of the first LC_SEGMENT command.
 342
 343      The relocation entries are grouped by module and the module table
 344      entries have indexes and counts into them for the group of external
 345      relocation entries for that the module.
 346
 347      For sections that are merged across modules there must not be any
 348      remaining external relocation entries for them (for merged sections
 349      remaining relocation entries must be local).  */
 350
 351   unsigned long extreloff;    /* Offset to external relocation entries.  */
 352   unsigned long nextrel;      /* Number of external relocation entries.  */
 353
 354   /* All the local relocation entries are grouped together (they are not
 355      grouped by their module since they are only used if the object is moved
 356      from it statically link edited address).  */
 357
 358   unsigned long locreloff;    /* Offset to local relocation entries.  */
 359   unsigned long nlocrel;      /* Number of local relocation entries.  */
 360
 361   bfd_mach_o_dylib_module *dylib_module;
 362   bfd_mach_o_dylib_table_of_content *dylib_toc;
 363   unsigned int *indirect_syms;
 364   bfd_mach_o_dylib_reference *ext_refs;
 365 }
 366 bfd_mach_o_dysymtab_command;
 367
 368 /* An indirect symbol table entry is simply a 32bit index into the symbol table
 369    to the symbol that the pointer or stub is refering to.  Unless it is for a
 370    non-lazy symbol pointer section for a defined symbol which strip(1) has
 371    removed.  In which case it has the value INDIRECT_SYMBOL_LOCAL.  If the
 372    symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that.  */
 373
 374 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
 375 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS   0x40000000
 376 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE  4
 377
 378 /* For LC_THREAD or LC_UNIXTHREAD.  */
 379
 380 typedef struct bfd_mach_o_thread_flavour
 381 {
 382   unsigned long flavour;
 383   unsigned long offset;
 384   unsigned long size;
 385 }
 386 bfd_mach_o_thread_flavour;
 387
 388 typedef struct bfd_mach_o_thread_command
 389 {
 390   unsigned long nflavours;
 391   bfd_mach_o_thread_flavour *flavours;
 392   asection *section;
 393 }
 394 bfd_mach_o_thread_command;
 395
 396 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER.  */
 397
 398 typedef struct bfd_mach_o_dylinker_command
 399 {
 400   unsigned long name_offset;         /* Offset to library's path name.  */
 401   unsigned long name_len;            /* Offset to library's path name.  */
 402   char *name_str;
 403 }
 404 bfd_mach_o_dylinker_command;
 405
 406 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
 407    or LC_REEXPORT_DYLIB.  */
 408
 409 typedef struct bfd_mach_o_dylib_command
 410 {
 411   unsigned long name_offset;           /* Offset to library's path name.  */
 412   unsigned long name_len;              /* Offset to library's path name.  */
 413   unsigned long timestamp;             /* Library's build time stamp.  */
 414   unsigned long current_version;       /* Library's current version number.  */
 415   unsigned long compatibility_version; /* Library's compatibility vers number.  */
 416   char *name_str;
 417 }
 418 bfd_mach_o_dylib_command;
 419
 420 /* For LC_PREBOUND_DYLIB.  */
 421
 422 typedef struct bfd_mach_o_prebound_dylib_command
 423 {
 424   unsigned long name;                /* Library's path name.  */
 425   unsigned long nmodules;            /* Number of modules in library.  */
 426   unsigned long linked_modules;      /* Bit vector of linked modules.  */
 427 }
 428 bfd_mach_o_prebound_dylib_command;
 429
 430 /* For LC_UUID.  */
 431
 432 typedef struct bfd_mach_o_uuid_command
 433 {
 434   unsigned char uuid[16];
 435 }
 436 bfd_mach_o_uuid_command;
 437
 438 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO.  */
 439
 440 typedef struct bfd_mach_o_linkedit_command
 441 {
 442   unsigned long dataoff;
 443   unsigned long datasize;
 444 }
 445 bfd_mach_o_linkedit_command;
 446
 447 typedef struct bfd_mach_o_str_command
 448 {
 449   unsigned long stroff;
 450   unsigned long str_len;
 451   char *str;
 452 }
 453 bfd_mach_o_str_command;
 454
 455 typedef struct bfd_mach_o_fvmlib_command
 456 {
 457   unsigned int name_offset;
 458   unsigned int name_len;
 459   char *name_str;
 460   unsigned int minor_version;
 461   unsigned int header_addr;
 462 }
 463 bfd_mach_o_fvmlib_command;
 464
 465 typedef struct bfd_mach_o_dyld_info_command
 466 {
 467   /* File offset and size to rebase info.  */
 468   unsigned int rebase_off;
 469   unsigned int rebase_size;
 470
 471   /* File offset and size of binding info.  */
 472   unsigned int bind_off;
 473   unsigned int bind_size;
 474
 475   /* File offset and size of weak binding info.  */
 476   unsigned int weak_bind_off;
 477   unsigned int weak_bind_size;
 478
 479   /* File offset and size of lazy binding info.  */
 480   unsigned int lazy_bind_off;
 481   unsigned int lazy_bind_size;
 482
 483   /* File offset and size of export info.  */
 484   unsigned int export_off;
 485   unsigned int export_size;
 486 }
 487 bfd_mach_o_dyld_info_command;
 488
 489 typedef struct bfd_mach_o_version_min_command
 490 {
 491   unsigned char rel;
 492   unsigned char maj;
 493   unsigned char min;
 494   unsigned int reserved;
 495 }
 496 bfd_mach_o_version_min_command;
 497
 498 typedef struct bfd_mach_o_encryption_info_command
 499 {
 500   unsigned int cryptoff;
 501   unsigned int cryptsize;
 502   unsigned int cryptid;
 503 }
 504 bfd_mach_o_encryption_info_command;
 505
 506 typedef struct bfd_mach_o_main_command
 507 {
 508   bfd_uint64_t entryoff;
 509   bfd_uint64_t stacksize;
 510 }
 511 bfd_mach_o_main_command;
 512
 513 typedef struct bfd_mach_o_source_version_command
 514 {
 515   unsigned int a;
 516   unsigned short b;
 517   unsigned short c;
 518   unsigned short d;
 519   unsigned short e;
 520 }
 521 bfd_mach_o_source_version_command;
 522
 523 typedef struct bfd_mach_o_load_command
 524 {
 525   bfd_mach_o_load_command_type type;
 526   bfd_boolean type_required;
 527   unsigned int offset;
 528   unsigned int len;
 529   union
 530   {
 531     bfd_mach_o_segment_command segment;
 532     bfd_mach_o_symtab_command symtab;
 533     bfd_mach_o_dysymtab_command dysymtab;
 534     bfd_mach_o_thread_command thread;
 535     bfd_mach_o_dylib_command dylib;
 536     bfd_mach_o_dylinker_command dylinker;
 537     bfd_mach_o_prebound_dylib_command prebound_dylib;
 538     bfd_mach_o_uuid_command uuid;
 539     bfd_mach_o_linkedit_command linkedit;
 540     bfd_mach_o_str_command str;
 541     bfd_mach_o_dyld_info_command dyld_info;
 542     bfd_mach_o_version_min_command version_min;
 543     bfd_mach_o_encryption_info_command encryption_info;
 544     bfd_mach_o_fvmlib_command fvmlib;
 545     bfd_mach_o_main_command main;
 546     bfd_mach_o_source_version_command source_version;
 547   }
 548   command;
 549 }
 550 bfd_mach_o_load_command;
 551
 552 typedef struct mach_o_data_struct
 553 {
 554   /* Mach-O header.  */
 555   bfd_mach_o_header header;
 556   /* Array of load commands (length is given by header.ncmds).  */
 557   bfd_mach_o_load_command *commands;
 558
 559   /* Flatten array of sections.  The array is 0-based.  */
 560   unsigned long nsects;
 561   bfd_mach_o_section **sections;
 562
 563   /* Used while writing: current length of the output file.  This is used
 564      to allocate space in the file.  */
 565   ufile_ptr filelen;
 566
 567   /* As symtab is referenced by other load command, it is handy to have
 568      a direct access to it.  Although it is not clearly stated, only one symtab
 569      is expected.  */
 570   bfd_mach_o_symtab_command *symtab;
 571   bfd_mach_o_dysymtab_command *dysymtab;
 572
 573   /* A place to stash dwarf2 info for this bfd.  */
 574   void *dwarf2_find_line_info;
 575
 576   /* BFD of .dSYM file. */
 577   bfd *dsym_bfd;
 578
 579   /* Cache of dynamic relocs. */
 580   arelent *dyn_reloc_cache;
 581 }
 582 bfd_mach_o_data_struct;
 583
 584 typedef struct bfd_mach_o_xlat_name
 585 {
 586   const char *name;
 587   unsigned long val;
 588 }
 589 bfd_mach_o_xlat_name;
 590
 591 /* Target specific routines.  */
 592
 593 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
 594 #define bfd_mach_o_get_backend_data(abfd) \
 595   ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
 596
 597 /* Get the Mach-O header for section SEC.  */
 598 #define bfd_mach_o_get_mach_o_section(sec) \
 599   ((bfd_mach_o_section *)(sec)->used_by_bfd)
 600
 601 bfd_boolean bfd_mach_o_valid (bfd *);
 602 bfd_boolean bfd_mach_o_mkobject_init (bfd *);
 603 const bfd_target *bfd_mach_o_object_p (bfd *);
 604 const bfd_target *bfd_mach_o_core_p (bfd *);
 605 const bfd_target *bfd_mach_o_archive_p (bfd *);
 606 bfd *bfd_mach_o_openr_next_archived_file (bfd *, bfd *);
 607 bfd_boolean bfd_mach_o_set_arch_mach (bfd *, enum bfd_architecture,
 608                                       unsigned long);
 609 int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
 610 bfd_boolean bfd_mach_o_new_section_hook (bfd *, asection *);
 611 bfd_boolean bfd_mach_o_write_contents (bfd *);
 612 bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *,
 613                                                      bfd *, asymbol *);
 614 bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
 615                                                       bfd *, asection *);
 616 bfd_boolean bfd_mach_o_bfd_copy_private_bfd_data (bfd *, bfd *);
 617 bfd_boolean bfd_mach_o_bfd_set_private_flags (bfd *, flagword);
 618 long bfd_mach_o_get_symtab_upper_bound (bfd *);
 619 long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
 620 long bfd_mach_o_get_synthetic_symtab (bfd *, long, asymbol **, long,
 621                                       asymbol **, asymbol **ret);
 622 long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *);
 623 long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **);
 624 long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *);
 625 long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **);
 626 asymbol *bfd_mach_o_make_empty_symbol (bfd *);
 627 void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
 628 void bfd_mach_o_print_symbol (bfd *, void *, asymbol *, bfd_print_symbol_type);
 629 int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *);
 630 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type);
 631 int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *);
 632 char *bfd_mach_o_core_file_failing_command (bfd *);
 633 int bfd_mach_o_core_file_failing_signal (bfd *);
 634 bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *);
 635 bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *);
 636 const bfd_target *bfd_mach_o_header_p (bfd *, bfd_mach_o_filetype,
 637                                        bfd_mach_o_cpu_type);
 638 bfd_boolean bfd_mach_o_build_commands (bfd *);
 639 bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
 640                                              file_ptr, bfd_size_type);
 641 unsigned int bfd_mach_o_version (bfd *);
 642
 643 unsigned int bfd_mach_o_get_section_type_from_name (bfd *, const char *);
 644 unsigned int bfd_mach_o_get_section_attribute_from_name (const char *);
 645
 646 void bfd_mach_o_convert_section_name_to_bfd (bfd *, const char *, const char *,
 647                                              const char **, flagword *);
 648 bfd_boolean bfd_mach_o_find_nearest_line (bfd *, asection *, asymbol **,
 649                                           bfd_vma, const char **,
 650                                           const char **, unsigned int *);
 651 bfd_boolean bfd_mach_o_close_and_cleanup (bfd *);
 652 bfd_boolean bfd_mach_o_free_cached_info (bfd *);
 653
 654 unsigned int bfd_mach_o_section_get_nbr_indirect (bfd *, bfd_mach_o_section *);
 655 unsigned int bfd_mach_o_section_get_entry_size (bfd *, bfd_mach_o_section *);
 656 bfd_boolean bfd_mach_o_read_symtab_symbols (bfd *);
 657 bfd_boolean bfd_mach_o_read_symtab_strtab (bfd *abfd);
 658
 659 /* A placeholder in case we need to suppress emitting the dysymtab for some
 660    reason (e.g. compatibility with older system versions).  */
 661 #define bfd_mach_o_should_emit_dysymtab(x) TRUE
 662
 663 extern const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[];
 664 extern const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[];
 665
 666 extern const bfd_target mach_o_fat_vec;
 667
 668 /* Interfaces between BFD names and Mach-O names.  */
 669
 670 typedef struct mach_o_section_name_xlat
 671 {
 672   const char *bfd_name;
 673   const char *mach_o_name;
 674   flagword bfd_flags;
 675   unsigned int macho_sectype;
 676   unsigned int macho_secattr;
 677   unsigned int sectalign;
 678 } mach_o_section_name_xlat;
 679
 680 typedef struct mach_o_segment_name_xlat
 681 {
 682   const char *segname;
 683   const mach_o_section_name_xlat *sections;
 684 } mach_o_segment_name_xlat;
 685
 686 const mach_o_section_name_xlat *
 687 bfd_mach_o_section_data_for_mach_sect (bfd *, const char *, const char *);
 688 const mach_o_section_name_xlat *
 689 bfd_mach_o_section_data_for_bfd_name (bfd *, const char *, const char **);
 690
 691 typedef struct bfd_mach_o_backend_data
 692 {
 693   enum bfd_architecture arch;
 694   bfd_boolean (*_bfd_mach_o_swap_reloc_in)(arelent *, bfd_mach_o_reloc_info *);
 695   bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
 696   bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
 697                                           void *, char *);
 698   const mach_o_segment_name_xlat *segsec_names_xlat;
 699   bfd_boolean (*bfd_mach_o_section_type_valid_for_target) (unsigned long);
 700 }
 701 bfd_mach_o_backend_data;
 702
 703 /* Values used in symbol.udata.i, to signal that the mach-o-specific data in the
 704    symbol are not yet set, or need validation (where this is possible).  */
 705
 706 #define SYM_MACHO_FIELDS_UNSET ((bfd_vma) -1)
 707 #define SYM_MACHO_FIELDS_NOT_VALIDATED ((bfd_vma) -2)
 708
 709 #endif /* _BFD_MACH_O_H_ */