bfd/mach-o.h

   1 /* Mach-O support for BFD.
   2    Copyright (C) 1999-2017 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 #include "mach-o/external.h"
  27
  28 #ifdef __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 typedef struct bfd_mach_o_header
  33 {
  34   unsigned long magic;
  35   unsigned long cputype;
  36   unsigned long cpusubtype;
  37   unsigned long filetype;
  38   unsigned long ncmds;
  39   unsigned long sizeofcmds;
  40   unsigned long flags;
  41   unsigned int reserved;
  42   /* Version 1: 32 bits, version 2: 64 bits.  */
  43   unsigned int version;
  44   enum bfd_endian byteorder;
  45 }
  46 bfd_mach_o_header;
  47
  48 typedef struct bfd_mach_o_asymbol
  49 {
  50   /* The actual symbol which the rest of BFD works with.  */
  51   asymbol symbol;
  52
  53   /* Mach-O symbol fields.  */
  54   unsigned char n_type;
  55   unsigned char n_sect;
  56   unsigned short n_desc;
  57 }
  58 bfd_mach_o_asymbol;
  59
  60 #define BFD_MACH_O_SEGNAME_SIZE 16
  61 #define BFD_MACH_O_SECTNAME_SIZE 16
  62
  63 typedef struct bfd_mach_o_section
  64 {
  65   /* Fields present in the file.  */
  66   char sectname[BFD_MACH_O_SECTNAME_SIZE + 1];  /* Always NUL padded.  */
  67   char segname[BFD_MACH_O_SEGNAME_SIZE + 1];
  68   bfd_vma addr;
  69   bfd_vma size;
  70   bfd_vma offset;
  71   unsigned long align;
  72   bfd_vma reloff;
  73   unsigned long nreloc;
  74   unsigned long flags;
  75   unsigned long reserved1;
  76   unsigned long reserved2;
  77   unsigned long reserved3;
  78
  79   /* Corresponding bfd section.  */
  80   asection *bfdsection;
  81
  82   /* An array holding the indirect symbols for this section.
  83      NULL values indicate local symbols.
  84      The number of symbols is determined from the section size and type.  */
  85
  86   bfd_mach_o_asymbol **indirect_syms;
  87
  88   /* Simply linked list.  */
  89   struct bfd_mach_o_section *next;
  90 }
  91 bfd_mach_o_section;
  92
  93 typedef struct bfd_mach_o_segment_command
  94 {
  95   char segname[BFD_MACH_O_SEGNAME_SIZE + 1];
  96   bfd_vma vmaddr;
  97   bfd_vma vmsize;
  98   bfd_vma fileoff;
  99   unsigned long filesize;
 100   unsigned long maxprot;        /* Maximum permitted protection.  */
 101   unsigned long initprot;       /* Initial protection.  */
 102   unsigned long nsects;
 103   unsigned long flags;
 104
 105   /* Linked list of sections.  */
 106   bfd_mach_o_section *sect_head;
 107   bfd_mach_o_section *sect_tail;
 108 }
 109 bfd_mach_o_segment_command;
 110
 111 /* Protection flags.  */
 112 #define BFD_MACH_O_PROT_READ    0x01
 113 #define BFD_MACH_O_PROT_WRITE   0x02
 114 #define BFD_MACH_O_PROT_EXECUTE 0x04
 115
 116 /* Expanded internal representation of a relocation entry.  */
 117 typedef struct bfd_mach_o_reloc_info
 118 {
 119   bfd_vma r_address;
 120   bfd_vma r_value;
 121   unsigned int r_scattered : 1;
 122   unsigned int r_type : 4;
 123   unsigned int r_pcrel : 1;
 124   unsigned int r_length : 2;
 125   unsigned int r_extern : 1;
 126 }
 127 bfd_mach_o_reloc_info;
 128
 129 /* The symbol table is sorted like this:
 130  (1) local.
 131         (otherwise in order of generation)
 132  (2) external defined
 133         (sorted by name)
 134  (3) external undefined / common
 135         (sorted by name)
 136 */
 137
 138 typedef struct bfd_mach_o_symtab_command
 139 {
 140   unsigned int symoff;
 141   unsigned int nsyms;
 142   unsigned int stroff;
 143   unsigned int strsize;
 144   bfd_mach_o_asymbol *symbols;
 145   char *strtab;
 146 }
 147 bfd_mach_o_symtab_command;
 148
 149 /* This is the second set of the symbolic information which is used to support
 150    the data structures for the dynamically link editor.
 151
 152    The original set of symbolic information in the symtab_command which contains
 153    the symbol and string tables must also be present when this load command is
 154    present.  When this load command is present the symbol table is organized
 155    into three groups of symbols:
 156        local symbols (static and debugging symbols) - grouped by module
 157        defined external symbols - grouped by module (sorted by name if not lib)
 158        undefined external symbols (sorted by name)
 159    In this load command there are offsets and counts to each of the three groups
 160    of symbols.
 161
 162    This load command contains a the offsets and sizes of the following new
 163    symbolic information tables:
 164        table of contents
 165        module table
 166        reference symbol table
 167        indirect symbol table
 168    The first three tables above (the table of contents, module table and
 169    reference symbol table) are only present if the file is a dynamically linked
 170    shared library.  For executable and object modules, which are files
 171    containing only one module, the information that would be in these three
 172    tables is determined as follows:
 173        table of contents - the defined external symbols are sorted by name
 174        module table - the file contains only one module so everything in the
 175                       file is part of the module.
 176        reference symbol table - is the defined and undefined external symbols
 177
 178    For dynamically linked shared library files this load command also contains
 179    offsets and sizes to the pool of relocation entries for all sections
 180    separated into two groups:
 181        external relocation entries
 182        local relocation entries
 183    For executable and object modules the relocation entries continue to hang
 184    off the section structures.  */
 185
 186 typedef struct bfd_mach_o_dylib_module
 187 {
 188   /* Index into the string table indicating the name of the module.  */
 189   unsigned long module_name_idx;
 190   char *module_name;
 191
 192   /* Index into the symbol table of the first defined external symbol provided
 193      by the module.  */
 194   unsigned long iextdefsym;
 195
 196   /* Number of external symbols provided by this module.  */
 197   unsigned long nextdefsym;
 198
 199   /* Index into the external reference table of the first entry
 200      provided by this module.  */
 201   unsigned long irefsym;
 202
 203   /* Number of external reference entries provided by this module.  */
 204   unsigned long nrefsym;
 205
 206   /* Index into the symbol table of the first local symbol provided by this
 207      module.  */
 208   unsigned long ilocalsym;
 209
 210   /* Number of local symbols provided by this module.  */
 211   unsigned long nlocalsym;
 212
 213   /* Index into the external relocation table of the first entry provided
 214      by this module.  */
 215   unsigned long iextrel;
 216
 217   /* Number of external relocation entries provided by this module.  */
 218   unsigned long nextrel;
 219
 220   /* Index in the module initialization section to the pointers for this
 221      module.  */
 222   unsigned short iinit;
 223
 224   /* Index in the module termination section to the pointers for this
 225      module.  */
 226   unsigned short iterm;
 227
 228   /* Number of pointers in the module initialization for this module.  */
 229   unsigned short ninit;
 230
 231   /* Number of pointers in the module termination for this module.  */
 232   unsigned short nterm;
 233
 234   /* Number of data byte for this module that are used in the __module_info
 235      section of the __OBJC segment.  */
 236   unsigned long objc_module_info_size;
 237
 238   /* Statically linked address of the start of the data for this module
 239      in the __module_info section of the __OBJC_segment.  */
 240   bfd_vma objc_module_info_addr;
 241 }
 242 bfd_mach_o_dylib_module;
 243
 244 typedef struct bfd_mach_o_dylib_table_of_content
 245 {
 246   /* Index into the symbol table to the defined external symbol.  */
 247   unsigned long symbol_index;
 248
 249   /* Index into the module table to the module for this entry.  */
 250   unsigned long module_index;
 251 }
 252 bfd_mach_o_dylib_table_of_content;
 253
 254 typedef struct bfd_mach_o_dylib_reference
 255 {
 256   /* Index into the symbol table for the symbol being referenced.  */
 257   unsigned long isym;
 258
 259   /* Type of the reference being made (use REFERENCE_FLAGS constants).  */
 260   unsigned long flags;
 261 }
 262 bfd_mach_o_dylib_reference;
 263 #define BFD_MACH_O_REFERENCE_SIZE 4
 264
 265 typedef struct bfd_mach_o_dysymtab_command
 266 {
 267   /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
 268      are grouped into the following three groups:
 269        local symbols (further grouped by the module they are from)
 270        defined external symbols (further grouped by the module they are from)
 271        undefined symbols
 272
 273      The local symbols are used only for debugging.  The dynamic binding
 274      process may have to use them to indicate to the debugger the local
 275      symbols for a module that is being bound.
 276
 277      The last two groups are used by the dynamic binding process to do the
 278      binding (indirectly through the module table and the reference symbol
 279      table when this is a dynamically linked shared library file).  */
 280
 281   unsigned long ilocalsym;    /* Index to local symbols.  */
 282   unsigned long nlocalsym;    /* Number of local symbols.  */
 283   unsigned long iextdefsym;   /* Index to externally defined symbols.  */
 284   unsigned long nextdefsym;   /* Number of externally defined symbols.  */
 285   unsigned long iundefsym;    /* Index to undefined symbols.  */
 286   unsigned long nundefsym;    /* Number of undefined symbols.  */
 287
 288   /* For the for the dynamic binding process to find which module a symbol
 289      is defined in the table of contents is used (analogous to the ranlib
 290      structure in an archive) which maps defined external symbols to modules
 291      they are defined in.  This exists only in a dynamically linked shared
 292      library file.  For executable and object modules the defined external
 293      symbols are sorted by name and is use as the table of contents.  */
 294
 295   unsigned long tocoff;       /* File offset to table of contents.  */
 296   unsigned long ntoc;         /* Number of entries in table of contents.  */
 297
 298   /* To support dynamic binding of "modules" (whole object files) the symbol
 299      table must reflect the modules that the file was created from.  This is
 300      done by having a module table that has indexes and counts into the merged
 301      tables for each module.  The module structure that these two entries
 302      refer to is described below.  This exists only in a dynamically linked
 303      shared library file.  For executable and object modules the file only
 304      contains one module so everything in the file belongs to the module.  */
 305
 306   unsigned long modtaboff;    /* File offset to module table.  */
 307   unsigned long nmodtab;      /* Number of module table entries.  */
 308
 309   /* To support dynamic module binding the module structure for each module
 310      indicates the external references (defined and undefined) each module
 311      makes.  For each module there is an offset and a count into the
 312      reference symbol table for the symbols that the module references.
 313      This exists only in a dynamically linked shared library file.  For
 314      executable and object modules the defined external symbols and the
 315      undefined external symbols indicates the external references.  */
 316
 317   unsigned long extrefsymoff;  /* Offset to referenced symbol table.  */
 318   unsigned long nextrefsyms;   /* Number of referenced symbol table entries.  */
 319
 320   /* The sections that contain "symbol pointers" and "routine stubs" have
 321      indexes and (implied counts based on the size of the section and fixed
 322      size of the entry) into the "indirect symbol" table for each pointer
 323      and stub.  For every section of these two types the index into the
 324      indirect symbol table is stored in the section header in the field
 325      reserved1.  An indirect symbol table entry is simply a 32bit index into
 326      the symbol table to the symbol that the pointer or stub is referring to.
 327      The indirect symbol table is ordered to match the entries in the section.  */
 328
 329   unsigned long indirectsymoff; /* File offset to the indirect symbol table.  */
 330   unsigned long nindirectsyms;  /* Number of indirect symbol table entries.  */
 331
 332   /* To support relocating an individual module in a library file quickly the
 333      external relocation entries for each module in the library need to be
 334      accessed efficiently.  Since the relocation entries can't be accessed
 335      through the section headers for a library file they are separated into
 336      groups of local and external entries further grouped by module.  In this
 337      case the presents of this load command who's extreloff, nextrel,
 338      locreloff and nlocrel fields are non-zero indicates that the relocation
 339      entries of non-merged sections are not referenced through the section
 340      structures (and the reloff and nreloc fields in the section headers are
 341      set to zero).
 342
 343      Since the relocation entries are not accessed through the section headers
 344      this requires the r_address field to be something other than a section
 345      offset to identify the item to be relocated.  In this case r_address is
 346      set to the offset from the vmaddr of the first LC_SEGMENT command.
 347
 348      The relocation entries are grouped by module and the module table
 349      entries have indexes and counts into them for the group of external
 350      relocation entries for that the module.
 351
 352      For sections that are merged across modules there must not be any
 353      remaining external relocation entries for them (for merged sections
 354      remaining relocation entries must be local).  */
 355
 356   unsigned long extreloff;    /* Offset to external relocation entries.  */
 357   unsigned long nextrel;      /* Number of external relocation entries.  */
 358
 359   /* All the local relocation entries are grouped together (they are not
 360      grouped by their module since they are only used if the object is moved
 361      from it statically link edited address).  */
 362
 363   unsigned long locreloff;    /* Offset to local relocation entries.  */
 364   unsigned long nlocrel;      /* Number of local relocation entries.  */
 365
 366   bfd_mach_o_dylib_module *dylib_module;
 367   bfd_mach_o_dylib_table_of_content *dylib_toc;
 368   unsigned int *indirect_syms;
 369   bfd_mach_o_dylib_reference *ext_refs;
 370 }
 371 bfd_mach_o_dysymtab_command;
 372
 373 /* An indirect symbol table entry is simply a 32bit index into the symbol table
 374    to the symbol that the pointer or stub is refering to.  Unless it is for a
 375    non-lazy symbol pointer section for a defined symbol which strip(1) has
 376    removed.  In which case it has the value INDIRECT_SYMBOL_LOCAL.  If the
 377    symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that.  */
 378
 379 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
 380 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS   0x40000000
 381 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE  4
 382
 383 /* For LC_TWOLEVEL_HINTS.  */
 384
 385 typedef struct bfd_mach_o_twolevel_hints_command
 386 {
 387   /* Offset to the hint table.  */
 388   unsigned int offset;
 389
 390   /* Number of entries in the table.  */
 391   unsigned int nhints;
 392 }
 393 bfd_mach_o_twolevel_hints_command;
 394
 395 /* For LC_PREBIND_CKSUM.  */
 396
 397 typedef struct bfd_mach_o_prebind_cksum_command
 398 {
 399   /* Checksum or zero.  */
 400   unsigned int cksum;
 401 }
 402 bfd_mach_o_prebind_cksum_command;
 403
 404 /* For LC_THREAD or LC_UNIXTHREAD.  */
 405
 406 typedef struct bfd_mach_o_thread_flavour
 407 {
 408   unsigned long flavour;
 409   unsigned long offset;
 410   unsigned long size;
 411 }
 412 bfd_mach_o_thread_flavour;
 413
 414 typedef struct bfd_mach_o_thread_command
 415 {
 416   unsigned long nflavours;
 417   bfd_mach_o_thread_flavour *flavours;
 418   asection *section;
 419 }
 420 bfd_mach_o_thread_command;
 421
 422 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER.  */
 423
 424 typedef struct bfd_mach_o_dylinker_command
 425 {
 426   unsigned int name_offset;         /* Offset to library's path name.  */
 427   char *name_str;
 428 }
 429 bfd_mach_o_dylinker_command;
 430
 431 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
 432    or LC_REEXPORT_DYLIB.  */
 433
 434 typedef struct bfd_mach_o_dylib_command
 435 {
 436   unsigned int name_offset;            /* Offset to library's path name.  */
 437   unsigned long timestamp;             /* Library's build time stamp.  */
 438   unsigned long current_version;       /* Library's current version number.  */
 439   unsigned long compatibility_version; /* Library's compatibility vers number.  */
 440   char *name_str;
 441 }
 442 bfd_mach_o_dylib_command;
 443
 444 /* For LC_PREBOUND_DYLIB.  */
 445
 446 typedef struct bfd_mach_o_prebound_dylib_command
 447 {
 448   unsigned int name_offset;           /* Library's path name.  */
 449   unsigned int nmodules;              /* Number of modules in library.  */
 450   unsigned int linked_modules_offset; /* Bit vector of linked modules.  */
 451
 452   char *name_str;
 453   unsigned char *linked_modules;
 454 }
 455 bfd_mach_o_prebound_dylib_command;
 456
 457 /* For LC_UUID.  */
 458
 459 typedef struct bfd_mach_o_uuid_command
 460 {
 461   unsigned char uuid[16];
 462 }
 463 bfd_mach_o_uuid_command;
 464
 465 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO.  */
 466
 467 typedef struct bfd_mach_o_linkedit_command
 468 {
 469   unsigned long dataoff;
 470   unsigned long datasize;
 471 }
 472 bfd_mach_o_linkedit_command;
 473
 474 typedef struct bfd_mach_o_str_command
 475 {
 476   unsigned long stroff;
 477   unsigned long str_len;
 478   char *str;
 479 }
 480 bfd_mach_o_str_command;
 481
 482 typedef struct bfd_mach_o_fvmlib_command
 483 {
 484   unsigned int name_offset;
 485   char *name_str;
 486   unsigned int minor_version;
 487   unsigned int header_addr;
 488 }
 489 bfd_mach_o_fvmlib_command;
 490
 491 typedef struct bfd_mach_o_dyld_info_command
 492 {
 493   /* File offset and size to rebase info.  */
 494   unsigned int rebase_off;
 495   unsigned int rebase_size;
 496   unsigned char *rebase_content;
 497
 498   /* File offset and size of binding info.  */
 499   unsigned int bind_off;
 500   unsigned int bind_size;
 501   unsigned char *bind_content;
 502
 503   /* File offset and size of weak binding info.  */
 504   unsigned int weak_bind_off;
 505   unsigned int weak_bind_size;
 506   unsigned char *weak_bind_content;
 507
 508   /* File offset and size of lazy binding info.  */
 509   unsigned int lazy_bind_off;
 510   unsigned int lazy_bind_size;
 511   unsigned char *lazy_bind_content;
 512
 513   /* File offset and size of export info.  */
 514   unsigned int export_off;
 515   unsigned int export_size;
 516   unsigned char *export_content;
 517 }
 518 bfd_mach_o_dyld_info_command;
 519
 520 typedef struct bfd_mach_o_version_min_command
 521 {
 522   unsigned char rel;
 523   unsigned char maj;
 524   unsigned char min;
 525   unsigned int reserved;
 526 }
 527 bfd_mach_o_version_min_command;
 528
 529 typedef struct bfd_mach_o_encryption_info_command
 530 {
 531   unsigned int cryptoff;
 532   unsigned int cryptsize;
 533   unsigned int cryptid;
 534 }
 535 bfd_mach_o_encryption_info_command;
 536
 537 typedef struct bfd_mach_o_main_command
 538 {
 539   bfd_uint64_t entryoff;
 540   bfd_uint64_t stacksize;
 541 }
 542 bfd_mach_o_main_command;
 543
 544 typedef struct bfd_mach_o_source_version_command
 545 {
 546   unsigned int a;
 547   unsigned short b;
 548   unsigned short c;
 549   unsigned short d;
 550   unsigned short e;
 551 }
 552 bfd_mach_o_source_version_command;
 553
 554 typedef struct bfd_mach_o_load_command
 555 {
 556   /* Next command in the single linked list.  */
 557   struct bfd_mach_o_load_command *next;
 558
 559   /* Type and required flag.  */
 560   bfd_mach_o_load_command_type type;
 561   bfd_boolean type_required;
 562
 563   /* Offset and length in the file.  */
 564   unsigned int offset;
 565   unsigned int len;
 566
 567   union
 568   {
 569     bfd_mach_o_segment_command segment;
 570     bfd_mach_o_symtab_command symtab;
 571     bfd_mach_o_dysymtab_command dysymtab;
 572     bfd_mach_o_thread_command thread;
 573     bfd_mach_o_dylib_command dylib;
 574     bfd_mach_o_dylinker_command dylinker;
 575     bfd_mach_o_prebound_dylib_command prebound_dylib;
 576     bfd_mach_o_prebind_cksum_command prebind_cksum;
 577     bfd_mach_o_twolevel_hints_command twolevel_hints;
 578     bfd_mach_o_uuid_command uuid;
 579     bfd_mach_o_linkedit_command linkedit;
 580     bfd_mach_o_str_command str;
 581     bfd_mach_o_dyld_info_command dyld_info;
 582     bfd_mach_o_version_min_command version_min;
 583     bfd_mach_o_encryption_info_command encryption_info;
 584     bfd_mach_o_fvmlib_command fvmlib;
 585     bfd_mach_o_main_command main;
 586     bfd_mach_o_source_version_command source_version;
 587   } command;
 588 }
 589 bfd_mach_o_load_command;
 590
 591 typedef struct mach_o_data_struct
 592 {
 593   /* Mach-O header.  */
 594   bfd_mach_o_header header;
 595
 596   /* File offset of the header.  Usually this is 0.  */
 597   file_ptr hdr_offset;
 598
 599   /* Array of load commands (length is given by header.ncmds).  */
 600   bfd_mach_o_load_command *first_command;
 601   bfd_mach_o_load_command *last_command;
 602
 603   /* Flatten array of sections.  The array is 0-based.  */
 604   unsigned long nsects;
 605   bfd_mach_o_section **sections;
 606
 607   /* Used while writing: current length of the output file.  This is used
 608      to allocate space in the file.  */
 609   ufile_ptr filelen;
 610
 611   /* As symtab is referenced by other load command, it is handy to have
 612      a direct access to it.  Although it is not clearly stated, only one symtab
 613      is expected.  */
 614   bfd_mach_o_symtab_command *symtab;
 615   bfd_mach_o_dysymtab_command *dysymtab;
 616
 617   /* A place to stash dwarf2 info for this bfd.  */
 618   void *dwarf2_find_line_info;
 619
 620   /* BFD of .dSYM file. */
 621   bfd *dsym_bfd;
 622
 623   /* Cache of dynamic relocs. */
 624   arelent *dyn_reloc_cache;
 625 }
 626 bfd_mach_o_data_struct;
 627
 628 typedef struct bfd_mach_o_xlat_name
 629 {
 630   const char *name;
 631   unsigned long val;
 632 }
 633 bfd_mach_o_xlat_name;
 634
 635 /* Target specific routines.  */
 636
 637 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
 638 #define bfd_mach_o_get_backend_data(abfd) \
 639   ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
 640
 641 /* Get the Mach-O header for section SEC.  */
 642 #define bfd_mach_o_get_mach_o_section(sec) \
 643   ((bfd_mach_o_section *)(sec)->used_by_bfd)
 644
 645 bfd_boolean bfd_mach_o_valid (bfd *);
 646 bfd_boolean bfd_mach_o_mkobject_init (bfd *);
 647 const bfd_target *bfd_mach_o_object_p (bfd *);
 648 const bfd_target *bfd_mach_o_core_p (bfd *);
 649 const bfd_target *bfd_mach_o_fat_archive_p (bfd *);
 650 bfd *bfd_mach_o_fat_openr_next_archived_file (bfd *, bfd *);
 651 bfd_boolean bfd_mach_o_set_arch_mach (bfd *, enum bfd_architecture,
 652                                       unsigned long);
 653 int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
 654 bfd_boolean bfd_mach_o_new_section_hook (bfd *, asection *);
 655 bfd_boolean bfd_mach_o_write_contents (bfd *);
 656 bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *,
 657                                                      bfd *, asymbol *);
 658 bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
 659                                                       bfd *, asection *);
 660 bfd_boolean bfd_mach_o_bfd_copy_private_header_data (bfd *, bfd *);
 661 bfd_boolean bfd_mach_o_bfd_set_private_flags (bfd *, flagword);
 662 long bfd_mach_o_get_symtab_upper_bound (bfd *);
 663 long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
 664 long bfd_mach_o_get_synthetic_symtab (bfd *, long, asymbol **, long,
 665                                       asymbol **, asymbol **ret);
 666 long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *);
 667 long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **);
 668 long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *);
 669 long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **);
 670 asymbol *bfd_mach_o_make_empty_symbol (bfd *);
 671 void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
 672 void bfd_mach_o_print_symbol (bfd *, void *, asymbol *, bfd_print_symbol_type);
 673 int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *);
 674 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type);
 675 int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *);
 676 char *bfd_mach_o_core_file_failing_command (bfd *);
 677 int bfd_mach_o_core_file_failing_signal (bfd *);
 678 bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *);
 679 bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *);
 680 const bfd_target *bfd_mach_o_header_p (bfd *, file_ptr, bfd_mach_o_filetype,
 681                                        bfd_mach_o_cpu_type);
 682 bfd_boolean bfd_mach_o_build_commands (bfd *);
 683 bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
 684                                              file_ptr, bfd_size_type);
 685 unsigned int bfd_mach_o_version (bfd *);
 686
 687 unsigned int bfd_mach_o_get_section_type_from_name (bfd *, const char *);
 688 unsigned int bfd_mach_o_get_section_attribute_from_name (const char *);
 689
 690 void bfd_mach_o_convert_section_name_to_bfd (bfd *, const char *, const char *,
 691                                              const char **, flagword *);
 692 bfd_boolean bfd_mach_o_find_nearest_line (bfd *, asymbol **,
 693                                           asection *, bfd_vma,
 694                                           const char **, const char **,
 695                                           unsigned int *, unsigned int *);
 696 #define bfd_mach_o_find_line _bfd_nosymbols_find_line
 697 bfd_boolean bfd_mach_o_close_and_cleanup (bfd *);
 698 bfd_boolean bfd_mach_o_free_cached_info (bfd *);
 699
 700 unsigned int bfd_mach_o_section_get_nbr_indirect (bfd *, bfd_mach_o_section *);
 701 unsigned int bfd_mach_o_section_get_entry_size (bfd *, bfd_mach_o_section *);
 702 bfd_boolean bfd_mach_o_read_symtab_symbols (bfd *);
 703 bfd_boolean bfd_mach_o_read_symtab_strtab (bfd *abfd);
 704
 705 bfd_vma bfd_mach_o_get_base_address (bfd *);
 706
 707 void bfd_mach_o_swap_in_non_scattered_reloc (bfd *, bfd_mach_o_reloc_info *,
 708                                              unsigned char *);
 709 bfd_boolean bfd_mach_o_canonicalize_non_scattered_reloc (bfd *, bfd_mach_o_reloc_info *, arelent *, asymbol **);
 710 bfd_boolean bfd_mach_o_pre_canonicalize_one_reloc (bfd *, struct mach_o_reloc_info_external *, bfd_mach_o_reloc_info *, arelent *, asymbol **);
 711
 712 /* A placeholder in case we need to suppress emitting the dysymtab for some
 713    reason (e.g. compatibility with older system versions).  */
 714 #define bfd_mach_o_should_emit_dysymtab(x) TRUE
 715
 716 extern const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[];
 717 extern const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[];
 718
 719 extern const bfd_target mach_o_fat_vec;
 720
 721 /* Interfaces between BFD names and Mach-O names.  */
 722
 723 typedef struct mach_o_section_name_xlat
 724 {
 725   const char *bfd_name;
 726   const char *mach_o_name;
 727   flagword bfd_flags;
 728   unsigned int macho_sectype;
 729   unsigned int macho_secattr;
 730   unsigned int sectalign;
 731 } mach_o_section_name_xlat;
 732
 733 typedef struct mach_o_segment_name_xlat
 734 {
 735   const char *segname;
 736   const mach_o_section_name_xlat *sections;
 737 } mach_o_segment_name_xlat;
 738
 739 const mach_o_section_name_xlat *
 740 bfd_mach_o_section_data_for_mach_sect (bfd *, const char *, const char *);
 741 const mach_o_section_name_xlat *
 742 bfd_mach_o_section_data_for_bfd_name (bfd *, const char *, const char **);
 743
 744 typedef struct bfd_mach_o_backend_data
 745 {
 746   enum bfd_architecture arch;
 747   bfd_vma page_size;
 748   bfd_boolean (*_bfd_mach_o_canonicalize_one_reloc)
 749   (bfd *, struct mach_o_reloc_info_external *, arelent *, asymbol **, arelent *);
 750   bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
 751   bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
 752                                           void *, char *);
 753   const mach_o_segment_name_xlat *segsec_names_xlat;
 754   bfd_boolean (*bfd_mach_o_section_type_valid_for_target) (unsigned long);
 755 }
 756 bfd_mach_o_backend_data;
 757
 758 /* Values used in symbol.udata.i, to signal that the mach-o-specific data in the
 759    symbol are not yet set, or need validation (where this is possible).  */
 760
 761 #define SYM_MACHO_FIELDS_UNSET ((bfd_vma) -1)
 762 #define SYM_MACHO_FIELDS_NOT_VALIDATED ((bfd_vma) -2)
 763
 764 #ifdef __cplusplus
 765 }
 766 #endif
 767
 768 #endif /* _BFD_MACH_O_H_ */