bfd/mach-o.h

   1 /* Mach-O support for BFD.
   2    Copyright (C) 1999-2015 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 #ifdef __cplusplus
  28 extern "C" {
  29 #endif
  30
  31 typedef struct bfd_mach_o_header
  32 {
  33   unsigned long magic;
  34   unsigned long cputype;
  35   unsigned long cpusubtype;
  36   unsigned long filetype;
  37   unsigned long ncmds;
  38   unsigned long sizeofcmds;
  39   unsigned long flags;
  40   unsigned int reserved;
  41   /* Version 1: 32 bits, version 2: 64 bits.  */
  42   unsigned int version;
  43   enum bfd_endian byteorder;
  44 }
  45 bfd_mach_o_header;
  46
  47 typedef struct bfd_mach_o_asymbol
  48 {
  49   /* The actual symbol which the rest of BFD works with.  */
  50   asymbol symbol;
  51
  52   /* Mach-O symbol fields.  */
  53   unsigned char n_type;
  54   unsigned char n_sect;
  55   unsigned short n_desc;
  56 }
  57 bfd_mach_o_asymbol;
  58
  59 #define BFD_MACH_O_SEGNAME_SIZE 16
  60 #define BFD_MACH_O_SECTNAME_SIZE 16
  61
  62 typedef struct bfd_mach_o_section
  63 {
  64   /* Fields present in the file.  */
  65   char sectname[BFD_MACH_O_SECTNAME_SIZE + 1];  /* Always NUL padded.  */
  66   char segname[BFD_MACH_O_SEGNAME_SIZE + 1];
  67   bfd_vma addr;
  68   bfd_vma size;
  69   bfd_vma offset;
  70   unsigned long align;
  71   bfd_vma reloff;
  72   unsigned long nreloc;
  73   unsigned long flags;
  74   unsigned long reserved1;
  75   unsigned long reserved2;
  76   unsigned long reserved3;
  77
  78   /* Corresponding bfd section.  */
  79   asection *bfdsection;
  80
  81   /* An array holding the indirect symbols for this section.
  82      NULL values indicate local symbols.
  83      The number of symbols is determined from the section size and type.  */
  84
  85   bfd_mach_o_asymbol **indirect_syms;
  86
  87   /* Simply linked list.  */
  88   struct bfd_mach_o_section *next;
  89 }
  90 bfd_mach_o_section;
  91
  92 typedef struct bfd_mach_o_segment_command
  93 {
  94   char segname[BFD_MACH_O_SEGNAME_SIZE + 1];
  95   bfd_vma vmaddr;
  96   bfd_vma vmsize;
  97   bfd_vma fileoff;
  98   unsigned long filesize;
  99   unsigned long maxprot;        /* Maximum permitted protection.  */
 100   unsigned long initprot;       /* Initial protection.  */
 101   unsigned long nsects;
 102   unsigned long flags;
 103
 104   /* Linked list of sections.  */
 105   bfd_mach_o_section *sect_head;
 106   bfd_mach_o_section *sect_tail;
 107 }
 108 bfd_mach_o_segment_command;
 109
 110 /* Protection flags.  */
 111 #define BFD_MACH_O_PROT_READ    0x01
 112 #define BFD_MACH_O_PROT_WRITE   0x02
 113 #define BFD_MACH_O_PROT_EXECUTE 0x04
 114
 115 /* Expanded internal representation of a relocation entry.  */
 116 typedef struct bfd_mach_o_reloc_info
 117 {
 118   bfd_vma r_address;
 119   bfd_vma r_value;
 120   unsigned int r_scattered : 1;
 121   unsigned int r_type : 4;
 122   unsigned int r_pcrel : 1;
 123   unsigned int r_length : 2;
 124   unsigned int r_extern : 1;
 125 }
 126 bfd_mach_o_reloc_info;
 127
 128 /* The symbol table is sorted like this:
 129  (1) local.
 130         (otherwise in order of generation)
 131  (2) external defined
 132         (sorted by name)
 133  (3) external undefined / common
 134         (sorted by name)
 135 */
 136
 137 typedef struct bfd_mach_o_symtab_command
 138 {
 139   unsigned int symoff;
 140   unsigned int nsyms;
 141   unsigned int stroff;
 142   unsigned int strsize;
 143   bfd_mach_o_asymbol *symbols;
 144   char *strtab;
 145 }
 146 bfd_mach_o_symtab_command;
 147
 148 /* This is the second set of the symbolic information which is used to support
 149    the data structures for the dynamically link editor.
 150
 151    The original set of symbolic information in the symtab_command which contains
 152    the symbol and string tables must also be present when this load command is
 153    present.  When this load command is present the symbol table is organized
 154    into three groups of symbols:
 155        local symbols (static and debugging symbols) - grouped by module
 156        defined external symbols - grouped by module (sorted by name if not lib)
 157        undefined external symbols (sorted by name)
 158    In this load command there are offsets and counts to each of the three groups
 159    of symbols.
 160
 161    This load command contains a the offsets and sizes of the following new
 162    symbolic information tables:
 163        table of contents
 164        module table
 165        reference symbol table
 166        indirect symbol table
 167    The first three tables above (the table of contents, module table and
 168    reference symbol table) are only present if the file is a dynamically linked
 169    shared library.  For executable and object modules, which are files
 170    containing only one module, the information that would be in these three
 171    tables is determined as follows:
 172        table of contents - the defined external symbols are sorted by name
 173        module table - the file contains only one module so everything in the
 174                       file is part of the module.
 175        reference symbol table - is the defined and undefined external symbols
 176
 177    For dynamically linked shared library files this load command also contains
 178    offsets and sizes to the pool of relocation entries for all sections
 179    separated into two groups:
 180        external relocation entries
 181        local relocation entries
 182    For executable and object modules the relocation entries continue to hang
 183    off the section structures.  */
 184
 185 typedef struct bfd_mach_o_dylib_module
 186 {
 187   /* Index into the string table indicating the name of the module.  */
 188   unsigned long module_name_idx;
 189   char *module_name;
 190
 191   /* Index into the symbol table of the first defined external symbol provided
 192      by the module.  */
 193   unsigned long iextdefsym;
 194
 195   /* Number of external symbols provided by this module.  */
 196   unsigned long nextdefsym;
 197
 198   /* Index into the external reference table of the first entry
 199      provided by this module.  */
 200   unsigned long irefsym;
 201
 202   /* Number of external reference entries provided by this module.  */
 203   unsigned long nrefsym;
 204
 205   /* Index into the symbol table of the first local symbol provided by this
 206      module.  */
 207   unsigned long ilocalsym;
 208
 209   /* Number of local symbols provided by this module.  */
 210   unsigned long nlocalsym;
 211
 212   /* Index into the external relocation table of the first entry provided
 213      by this module.  */
 214   unsigned long iextrel;
 215
 216   /* Number of external relocation entries provided by this module.  */
 217   unsigned long nextrel;
 218
 219   /* Index in the module initialization section to the pointers for this
 220      module.  */
 221   unsigned short iinit;
 222
 223   /* Index in the module termination section to the pointers for this
 224      module.  */
 225   unsigned short iterm;
 226
 227   /* Number of pointers in the module initialization for this module.  */
 228   unsigned short ninit;
 229
 230   /* Number of pointers in the module termination for this module.  */
 231   unsigned short nterm;
 232
 233   /* Number of data byte for this module that are used in the __module_info
 234      section of the __OBJC segment.  */
 235   unsigned long objc_module_info_size;
 236
 237   /* Statically linked address of the start of the data for this module
 238      in the __module_info section of the __OBJC_segment.  */
 239   bfd_vma objc_module_info_addr;
 240 }
 241 bfd_mach_o_dylib_module;
 242
 243 typedef struct bfd_mach_o_dylib_table_of_content
 244 {
 245   /* Index into the symbol table to the defined external symbol.  */
 246   unsigned long symbol_index;
 247
 248   /* Index into the module table to the module for this entry.  */
 249   unsigned long module_index;
 250 }
 251 bfd_mach_o_dylib_table_of_content;
 252
 253 typedef struct bfd_mach_o_dylib_reference
 254 {
 255   /* Index into the symbol table for the symbol being referenced.  */
 256   unsigned long isym;
 257
 258   /* Type of the reference being made (use REFERENCE_FLAGS constants).  */
 259   unsigned long flags;
 260 }
 261 bfd_mach_o_dylib_reference;
 262 #define BFD_MACH_O_REFERENCE_SIZE 4
 263
 264 typedef struct bfd_mach_o_dysymtab_command
 265 {
 266   /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
 267      are grouped into the following three groups:
 268        local symbols (further grouped by the module they are from)
 269        defined external symbols (further grouped by the module they are from)
 270        undefined symbols
 271
 272      The local symbols are used only for debugging.  The dynamic binding
 273      process may have to use them to indicate to the debugger the local
 274      symbols for a module that is being bound.
 275
 276      The last two groups are used by the dynamic binding process to do the
 277      binding (indirectly through the module table and the reference symbol
 278      table when this is a dynamically linked shared library file).  */
 279
 280   unsigned long ilocalsym;    /* Index to local symbols.  */
 281   unsigned long nlocalsym;    /* Number of local symbols.  */
 282   unsigned long iextdefsym;   /* Index to externally defined symbols.  */
 283   unsigned long nextdefsym;   /* Number of externally defined symbols.  */
 284   unsigned long iundefsym;    /* Index to undefined symbols.  */
 285   unsigned long nundefsym;    /* Number of undefined symbols.  */
 286
 287   /* For the for the dynamic binding process to find which module a symbol
 288      is defined in the table of contents is used (analogous to the ranlib
 289      structure in an archive) which maps defined external symbols to modules
 290      they are defined in.  This exists only in a dynamically linked shared
 291      library file.  For executable and object modules the defined external
 292      symbols are sorted by name and is use as the table of contents.  */
 293
 294   unsigned long tocoff;       /* File offset to table of contents.  */
 295   unsigned long ntoc;         /* Number of entries in table of contents.  */
 296
 297   /* To support dynamic binding of "modules" (whole object files) the symbol
 298      table must reflect the modules that the file was created from.  This is
 299      done by having a module table that has indexes and counts into the merged
 300      tables for each module.  The module structure that these two entries
 301      refer to is described below.  This exists only in a dynamically linked
 302      shared library file.  For executable and object modules the file only
 303      contains one module so everything in the file belongs to the module.  */
 304
 305   unsigned long modtaboff;    /* File offset to module table.  */
 306   unsigned long nmodtab;      /* Number of module table entries.  */
 307
 308   /* To support dynamic module binding the module structure for each module
 309      indicates the external references (defined and undefined) each module
 310      makes.  For each module there is an offset and a count into the
 311      reference symbol table for the symbols that the module references.
 312      This exists only in a dynamically linked shared library file.  For
 313      executable and object modules the defined external symbols and the
 314      undefined external symbols indicates the external references.  */
 315
 316   unsigned long extrefsymoff;  /* Offset to referenced symbol table.  */
 317   unsigned long nextrefsyms;   /* Number of referenced symbol table entries.  */
 318
 319   /* The sections that contain "symbol pointers" and "routine stubs" have
 320      indexes and (implied counts based on the size of the section and fixed
 321      size of the entry) into the "indirect symbol" table for each pointer
 322      and stub.  For every section of these two types the index into the
 323      indirect symbol table is stored in the section header in the field
 324      reserved1.  An indirect symbol table entry is simply a 32bit index into
 325      the symbol table to the symbol that the pointer or stub is referring to.
 326      The indirect symbol table is ordered to match the entries in the section.  */
 327
 328   unsigned long indirectsymoff; /* File offset to the indirect symbol table.  */
 329   unsigned long nindirectsyms;  /* Number of indirect symbol table entries.  */
 330
 331   /* To support relocating an individual module in a library file quickly the
 332      external relocation entries for each module in the library need to be
 333      accessed efficiently.  Since the relocation entries can't be accessed
 334      through the section headers for a library file they are separated into
 335      groups of local and external entries further grouped by module.  In this
 336      case the presents of this load command who's extreloff, nextrel,
 337      locreloff and nlocrel fields are non-zero indicates that the relocation
 338      entries of non-merged sections are not referenced through the section
 339      structures (and the reloff and nreloc fields in the section headers are
 340      set to zero).
 341
 342      Since the relocation entries are not accessed through the section headers
 343      this requires the r_address field to be something other than a section
 344      offset to identify the item to be relocated.  In this case r_address is
 345      set to the offset from the vmaddr of the first LC_SEGMENT command.
 346
 347      The relocation entries are grouped by module and the module table
 348      entries have indexes and counts into them for the group of external
 349      relocation entries for that the module.
 350
 351      For sections that are merged across modules there must not be any
 352      remaining external relocation entries for them (for merged sections
 353      remaining relocation entries must be local).  */
 354
 355   unsigned long extreloff;    /* Offset to external relocation entries.  */
 356   unsigned long nextrel;      /* Number of external relocation entries.  */
 357
 358   /* All the local relocation entries are grouped together (they are not
 359      grouped by their module since they are only used if the object is moved
 360      from it statically link edited address).  */
 361
 362   unsigned long locreloff;    /* Offset to local relocation entries.  */
 363   unsigned long nlocrel;      /* Number of local relocation entries.  */
 364
 365   bfd_mach_o_dylib_module *dylib_module;
 366   bfd_mach_o_dylib_table_of_content *dylib_toc;
 367   unsigned int *indirect_syms;
 368   bfd_mach_o_dylib_reference *ext_refs;
 369 }
 370 bfd_mach_o_dysymtab_command;
 371
 372 /* An indirect symbol table entry is simply a 32bit index into the symbol table
 373    to the symbol that the pointer or stub is refering to.  Unless it is for a
 374    non-lazy symbol pointer section for a defined symbol which strip(1) has
 375    removed.  In which case it has the value INDIRECT_SYMBOL_LOCAL.  If the
 376    symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that.  */
 377
 378 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
 379 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS   0x40000000
 380 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE  4
 381
 382 /* For LC_TWOLEVEL_HINTS.  */
 383
 384 typedef struct bfd_mach_o_twolevel_hints_command
 385 {
 386   /* Offset to the hint table.  */
 387   unsigned int offset;
 388
 389   /* Number of entries in the table.  */
 390   unsigned int nhints;
 391 }
 392 bfd_mach_o_twolevel_hints_command;
 393
 394 /* For LC_PREBIND_CKSUM.  */
 395
 396 typedef struct bfd_mach_o_prebind_cksum_command
 397 {
 398   /* Checksum or zero.  */
 399   unsigned int cksum;
 400 }
 401 bfd_mach_o_prebind_cksum_command;
 402
 403 /* For LC_THREAD or LC_UNIXTHREAD.  */
 404
 405 typedef struct bfd_mach_o_thread_flavour
 406 {
 407   unsigned long flavour;
 408   unsigned long offset;
 409   unsigned long size;
 410 }
 411 bfd_mach_o_thread_flavour;
 412
 413 typedef struct bfd_mach_o_thread_command
 414 {
 415   unsigned long nflavours;
 416   bfd_mach_o_thread_flavour *flavours;
 417   asection *section;
 418 }
 419 bfd_mach_o_thread_command;
 420
 421 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER.  */
 422
 423 typedef struct bfd_mach_o_dylinker_command
 424 {
 425   unsigned int name_offset;         /* Offset to library's path name.  */
 426   char *name_str;
 427 }
 428 bfd_mach_o_dylinker_command;
 429
 430 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
 431    or LC_REEXPORT_DYLIB.  */
 432
 433 typedef struct bfd_mach_o_dylib_command
 434 {
 435   unsigned int name_offset;            /* Offset to library's path name.  */
 436   unsigned long timestamp;             /* Library's build time stamp.  */
 437   unsigned long current_version;       /* Library's current version number.  */
 438   unsigned long compatibility_version; /* Library's compatibility vers number.  */
 439   char *name_str;
 440 }
 441 bfd_mach_o_dylib_command;
 442
 443 /* For LC_PREBOUND_DYLIB.  */
 444
 445 typedef struct bfd_mach_o_prebound_dylib_command
 446 {
 447   unsigned int name_offset;           /* Library's path name.  */
 448   unsigned int nmodules;              /* Number of modules in library.  */
 449   unsigned int linked_modules_offset; /* Bit vector of linked modules.  */
 450
 451   char *name_str;
 452   unsigned char *linked_modules;
 453 }
 454 bfd_mach_o_prebound_dylib_command;
 455
 456 /* For LC_UUID.  */
 457
 458 typedef struct bfd_mach_o_uuid_command
 459 {
 460   unsigned char uuid[16];
 461 }
 462 bfd_mach_o_uuid_command;
 463
 464 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO.  */
 465
 466 typedef struct bfd_mach_o_linkedit_command
 467 {
 468   unsigned long dataoff;
 469   unsigned long datasize;
 470 }
 471 bfd_mach_o_linkedit_command;
 472
 473 typedef struct bfd_mach_o_str_command
 474 {
 475   unsigned long stroff;
 476   unsigned long str_len;
 477   char *str;
 478 }
 479 bfd_mach_o_str_command;
 480
 481 typedef struct bfd_mach_o_fvmlib_command
 482 {
 483   unsigned int name_offset;
 484   char *name_str;
 485   unsigned int minor_version;
 486   unsigned int header_addr;
 487 }
 488 bfd_mach_o_fvmlib_command;
 489
 490 typedef struct bfd_mach_o_dyld_info_command
 491 {
 492   /* File offset and size to rebase info.  */
 493   unsigned int rebase_off;
 494   unsigned int rebase_size;
 495   unsigned char *rebase_content;
 496
 497   /* File offset and size of binding info.  */
 498   unsigned int bind_off;
 499   unsigned int bind_size;
 500   unsigned char *bind_content;
 501
 502   /* File offset and size of weak binding info.  */
 503   unsigned int weak_bind_off;
 504   unsigned int weak_bind_size;
 505   unsigned char *weak_bind_content;
 506
 507   /* File offset and size of lazy binding info.  */
 508   unsigned int lazy_bind_off;
 509   unsigned int lazy_bind_size;
 510   unsigned char *lazy_bind_content;
 511
 512   /* File offset and size of export info.  */
 513   unsigned int export_off;
 514   unsigned int export_size;
 515   unsigned char *export_content;
 516 }
 517 bfd_mach_o_dyld_info_command;
 518
 519 typedef struct bfd_mach_o_version_min_command
 520 {
 521   unsigned char rel;
 522   unsigned char maj;
 523   unsigned char min;
 524   unsigned int reserved;
 525 }
 526 bfd_mach_o_version_min_command;
 527
 528 typedef struct bfd_mach_o_encryption_info_command
 529 {
 530   unsigned int cryptoff;
 531   unsigned int cryptsize;
 532   unsigned int cryptid;
 533 }
 534 bfd_mach_o_encryption_info_command;
 535
 536 typedef struct bfd_mach_o_main_command
 537 {
 538   bfd_uint64_t entryoff;
 539   bfd_uint64_t stacksize;
 540 }
 541 bfd_mach_o_main_command;
 542
 543 typedef struct bfd_mach_o_source_version_command
 544 {
 545   unsigned int a;
 546   unsigned short b;
 547   unsigned short c;
 548   unsigned short d;
 549   unsigned short e;
 550 }
 551 bfd_mach_o_source_version_command;
 552
 553 typedef struct bfd_mach_o_load_command
 554 {
 555   /* Next command in the single linked list.  */
 556   struct bfd_mach_o_load_command *next;
 557
 558   /* Type and required flag.  */
 559   bfd_mach_o_load_command_type type;
 560   bfd_boolean type_required;
 561
 562   /* Offset and length in the file.  */
 563   unsigned int offset;
 564   unsigned int len;
 565
 566   union
 567   {
 568     bfd_mach_o_segment_command segment;
 569     bfd_mach_o_symtab_command symtab;
 570     bfd_mach_o_dysymtab_command dysymtab;
 571     bfd_mach_o_thread_command thread;
 572     bfd_mach_o_dylib_command dylib;
 573     bfd_mach_o_dylinker_command dylinker;
 574     bfd_mach_o_prebound_dylib_command prebound_dylib;
 575     bfd_mach_o_prebind_cksum_command prebind_cksum;
 576     bfd_mach_o_twolevel_hints_command twolevel_hints;
 577     bfd_mach_o_uuid_command uuid;
 578     bfd_mach_o_linkedit_command linkedit;
 579     bfd_mach_o_str_command str;
 580     bfd_mach_o_dyld_info_command dyld_info;
 581     bfd_mach_o_version_min_command version_min;
 582     bfd_mach_o_encryption_info_command encryption_info;
 583     bfd_mach_o_fvmlib_command fvmlib;
 584     bfd_mach_o_main_command main;
 585     bfd_mach_o_source_version_command source_version;
 586   } command;
 587 }
 588 bfd_mach_o_load_command;
 589
 590 typedef struct mach_o_data_struct
 591 {
 592   /* Mach-O header.  */
 593   bfd_mach_o_header header;
 594   /* Array of load commands (length is given by header.ncmds).  */
 595   bfd_mach_o_load_command *first_command;
 596   bfd_mach_o_load_command *last_command;
 597
 598   /* Flatten array of sections.  The array is 0-based.  */
 599   unsigned long nsects;
 600   bfd_mach_o_section **sections;
 601
 602   /* Used while writing: current length of the output file.  This is used
 603      to allocate space in the file.  */
 604   ufile_ptr filelen;
 605
 606   /* As symtab is referenced by other load command, it is handy to have
 607      a direct access to it.  Although it is not clearly stated, only one symtab
 608      is expected.  */
 609   bfd_mach_o_symtab_command *symtab;
 610   bfd_mach_o_dysymtab_command *dysymtab;
 611
 612   /* A place to stash dwarf2 info for this bfd.  */
 613   void *dwarf2_find_line_info;
 614
 615   /* BFD of .dSYM file. */
 616   bfd *dsym_bfd;
 617
 618   /* Cache of dynamic relocs. */
 619   arelent *dyn_reloc_cache;
 620 }
 621 bfd_mach_o_data_struct;
 622
 623 typedef struct bfd_mach_o_xlat_name
 624 {
 625   const char *name;
 626   unsigned long val;
 627 }
 628 bfd_mach_o_xlat_name;
 629
 630 /* Target specific routines.  */
 631
 632 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
 633 #define bfd_mach_o_get_backend_data(abfd) \
 634   ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
 635
 636 /* Get the Mach-O header for section SEC.  */
 637 #define bfd_mach_o_get_mach_o_section(sec) \
 638   ((bfd_mach_o_section *)(sec)->used_by_bfd)
 639
 640 bfd_boolean bfd_mach_o_valid (bfd *);
 641 bfd_boolean bfd_mach_o_mkobject_init (bfd *);
 642 const bfd_target *bfd_mach_o_object_p (bfd *);
 643 const bfd_target *bfd_mach_o_core_p (bfd *);
 644 const bfd_target *bfd_mach_o_archive_p (bfd *);
 645 bfd *bfd_mach_o_openr_next_archived_file (bfd *, bfd *);
 646 bfd_boolean bfd_mach_o_set_arch_mach (bfd *, enum bfd_architecture,
 647                                       unsigned long);
 648 int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
 649 bfd_boolean bfd_mach_o_new_section_hook (bfd *, asection *);
 650 bfd_boolean bfd_mach_o_write_contents (bfd *);
 651 bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *,
 652                                                      bfd *, asymbol *);
 653 bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
 654                                                       bfd *, asection *);
 655 bfd_boolean bfd_mach_o_bfd_copy_private_header_data (bfd *, bfd *);
 656 bfd_boolean bfd_mach_o_bfd_set_private_flags (bfd *, flagword);
 657 long bfd_mach_o_get_symtab_upper_bound (bfd *);
 658 long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
 659 long bfd_mach_o_get_synthetic_symtab (bfd *, long, asymbol **, long,
 660                                       asymbol **, asymbol **ret);
 661 long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *);
 662 long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **);
 663 long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *);
 664 long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **);
 665 asymbol *bfd_mach_o_make_empty_symbol (bfd *);
 666 void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
 667 void bfd_mach_o_print_symbol (bfd *, void *, asymbol *, bfd_print_symbol_type);
 668 int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *);
 669 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type);
 670 int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *);
 671 char *bfd_mach_o_core_file_failing_command (bfd *);
 672 int bfd_mach_o_core_file_failing_signal (bfd *);
 673 bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *);
 674 bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *);
 675 const bfd_target *bfd_mach_o_header_p (bfd *, bfd_mach_o_filetype,
 676                                        bfd_mach_o_cpu_type);
 677 bfd_boolean bfd_mach_o_build_commands (bfd *);
 678 bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
 679                                              file_ptr, bfd_size_type);
 680 unsigned int bfd_mach_o_version (bfd *);
 681
 682 unsigned int bfd_mach_o_get_section_type_from_name (bfd *, const char *);
 683 unsigned int bfd_mach_o_get_section_attribute_from_name (const char *);
 684
 685 void bfd_mach_o_convert_section_name_to_bfd (bfd *, const char *, const char *,
 686                                              const char **, flagword *);
 687 bfd_boolean bfd_mach_o_find_nearest_line (bfd *, asymbol **,
 688                                           asection *, bfd_vma,
 689                                           const char **, const char **,
 690                                           unsigned int *, unsigned int *);
 691 #define bfd_mach_o_find_line _bfd_nosymbols_find_line
 692 bfd_boolean bfd_mach_o_close_and_cleanup (bfd *);
 693 bfd_boolean bfd_mach_o_free_cached_info (bfd *);
 694
 695 unsigned int bfd_mach_o_section_get_nbr_indirect (bfd *, bfd_mach_o_section *);
 696 unsigned int bfd_mach_o_section_get_entry_size (bfd *, bfd_mach_o_section *);
 697 bfd_boolean bfd_mach_o_read_symtab_symbols (bfd *);
 698 bfd_boolean bfd_mach_o_read_symtab_strtab (bfd *abfd);
 699
 700 bfd_vma bfd_mach_o_get_base_address (bfd *);
 701
 702 /* A placeholder in case we need to suppress emitting the dysymtab for some
 703    reason (e.g. compatibility with older system versions).  */
 704 #define bfd_mach_o_should_emit_dysymtab(x) TRUE
 705
 706 extern const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[];
 707 extern const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[];
 708
 709 extern const bfd_target mach_o_fat_vec;
 710
 711 /* Interfaces between BFD names and Mach-O names.  */
 712
 713 typedef struct mach_o_section_name_xlat
 714 {
 715   const char *bfd_name;
 716   const char *mach_o_name;
 717   flagword bfd_flags;
 718   unsigned int macho_sectype;
 719   unsigned int macho_secattr;
 720   unsigned int sectalign;
 721 } mach_o_section_name_xlat;
 722
 723 typedef struct mach_o_segment_name_xlat
 724 {
 725   const char *segname;
 726   const mach_o_section_name_xlat *sections;
 727 } mach_o_segment_name_xlat;
 728
 729 const mach_o_section_name_xlat *
 730 bfd_mach_o_section_data_for_mach_sect (bfd *, const char *, const char *);
 731 const mach_o_section_name_xlat *
 732 bfd_mach_o_section_data_for_bfd_name (bfd *, const char *, const char **);
 733
 734 typedef struct bfd_mach_o_backend_data
 735 {
 736   enum bfd_architecture arch;
 737   bfd_vma page_size;
 738   bfd_boolean (*_bfd_mach_o_swap_reloc_in)(arelent *, bfd_mach_o_reloc_info *);
 739   bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
 740   bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
 741                                           void *, char *);
 742   const mach_o_segment_name_xlat *segsec_names_xlat;
 743   bfd_boolean (*bfd_mach_o_section_type_valid_for_target) (unsigned long);
 744 }
 745 bfd_mach_o_backend_data;
 746
 747 /* Values used in symbol.udata.i, to signal that the mach-o-specific data in the
 748    symbol are not yet set, or need validation (where this is possible).  */
 749
 750 #define SYM_MACHO_FIELDS_UNSET ((bfd_vma) -1)
 751 #define SYM_MACHO_FIELDS_NOT_VALIDATED ((bfd_vma) -2)
 752
 753 #ifdef __cplusplus
 754 }
 755 #endif
 756
 757 #endif /* _BFD_MACH_O_H_ */