bfd/mach-o.h

   1 /* Mach-O support for BFD.
   2    Copyright (C) 1999-2018 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 /* Target platforms.  */
 117 #define BFD_MACH_O_PLATFORM_MACOS    1
 118 #define BFD_MACH_O_PLATFORM_IOS      2
 119 #define BFD_MACH_O_PLATFORM_TVOS     3
 120 #define BFD_MACH_O_PLATFORM_WATCHOS  4
 121 #define BFD_MACH_O_PLATFORM_BRIDGEOS 5
 122
 123 /* Build tools.  */
 124 #define BFD_MACH_O_TOOL_CLANG 1
 125 #define BFD_MACH_O_TOOL_SWIFT 2
 126 #define BFD_MACH_O_TOOL_LD    3
 127
 128 /* Expanded internal representation of a relocation entry.  */
 129 typedef struct bfd_mach_o_reloc_info
 130 {
 131   bfd_vma r_address;
 132   bfd_vma r_value;
 133   unsigned int r_scattered : 1;
 134   unsigned int r_type : 4;
 135   unsigned int r_pcrel : 1;
 136   unsigned int r_length : 2;
 137   unsigned int r_extern : 1;
 138 }
 139 bfd_mach_o_reloc_info;
 140
 141 /* The symbol table is sorted like this:
 142  (1) local.
 143         (otherwise in order of generation)
 144  (2) external defined
 145         (sorted by name)
 146  (3) external undefined / common
 147         (sorted by name)
 148 */
 149
 150 typedef struct bfd_mach_o_symtab_command
 151 {
 152   unsigned int symoff;
 153   unsigned int nsyms;
 154   unsigned int stroff;
 155   unsigned int strsize;
 156   bfd_mach_o_asymbol *symbols;
 157   char *strtab;
 158 }
 159 bfd_mach_o_symtab_command;
 160
 161 /* This is the second set of the symbolic information which is used to support
 162    the data structures for the dynamically link editor.
 163
 164    The original set of symbolic information in the symtab_command which contains
 165    the symbol and string tables must also be present when this load command is
 166    present.  When this load command is present the symbol table is organized
 167    into three groups of symbols:
 168        local symbols (static and debugging symbols) - grouped by module
 169        defined external symbols - grouped by module (sorted by name if not lib)
 170        undefined external symbols (sorted by name)
 171    In this load command there are offsets and counts to each of the three groups
 172    of symbols.
 173
 174    This load command contains a the offsets and sizes of the following new
 175    symbolic information tables:
 176        table of contents
 177        module table
 178        reference symbol table
 179        indirect symbol table
 180    The first three tables above (the table of contents, module table and
 181    reference symbol table) are only present if the file is a dynamically linked
 182    shared library.  For executable and object modules, which are files
 183    containing only one module, the information that would be in these three
 184    tables is determined as follows:
 185        table of contents - the defined external symbols are sorted by name
 186        module table - the file contains only one module so everything in the
 187                       file is part of the module.
 188        reference symbol table - is the defined and undefined external symbols
 189
 190    For dynamically linked shared library files this load command also contains
 191    offsets and sizes to the pool of relocation entries for all sections
 192    separated into two groups:
 193        external relocation entries
 194        local relocation entries
 195    For executable and object modules the relocation entries continue to hang
 196    off the section structures.  */
 197
 198 typedef struct bfd_mach_o_dylib_module
 199 {
 200   /* Index into the string table indicating the name of the module.  */
 201   unsigned long module_name_idx;
 202   char *module_name;
 203
 204   /* Index into the symbol table of the first defined external symbol provided
 205      by the module.  */
 206   unsigned long iextdefsym;
 207
 208   /* Number of external symbols provided by this module.  */
 209   unsigned long nextdefsym;
 210
 211   /* Index into the external reference table of the first entry
 212      provided by this module.  */
 213   unsigned long irefsym;
 214
 215   /* Number of external reference entries provided by this module.  */
 216   unsigned long nrefsym;
 217
 218   /* Index into the symbol table of the first local symbol provided by this
 219      module.  */
 220   unsigned long ilocalsym;
 221
 222   /* Number of local symbols provided by this module.  */
 223   unsigned long nlocalsym;
 224
 225   /* Index into the external relocation table of the first entry provided
 226      by this module.  */
 227   unsigned long iextrel;
 228
 229   /* Number of external relocation entries provided by this module.  */
 230   unsigned long nextrel;
 231
 232   /* Index in the module initialization section to the pointers for this
 233      module.  */
 234   unsigned short iinit;
 235
 236   /* Index in the module termination section to the pointers for this
 237      module.  */
 238   unsigned short iterm;
 239
 240   /* Number of pointers in the module initialization for this module.  */
 241   unsigned short ninit;
 242
 243   /* Number of pointers in the module termination for this module.  */
 244   unsigned short nterm;
 245
 246   /* Number of data byte for this module that are used in the __module_info
 247      section of the __OBJC segment.  */
 248   unsigned long objc_module_info_size;
 249
 250   /* Statically linked address of the start of the data for this module
 251      in the __module_info section of the __OBJC_segment.  */
 252   bfd_vma objc_module_info_addr;
 253 }
 254 bfd_mach_o_dylib_module;
 255
 256 typedef struct bfd_mach_o_dylib_table_of_content
 257 {
 258   /* Index into the symbol table to the defined external symbol.  */
 259   unsigned long symbol_index;
 260
 261   /* Index into the module table to the module for this entry.  */
 262   unsigned long module_index;
 263 }
 264 bfd_mach_o_dylib_table_of_content;
 265
 266 typedef struct bfd_mach_o_dylib_reference
 267 {
 268   /* Index into the symbol table for the symbol being referenced.  */
 269   unsigned long isym;
 270
 271   /* Type of the reference being made (use REFERENCE_FLAGS constants).  */
 272   unsigned long flags;
 273 }
 274 bfd_mach_o_dylib_reference;
 275 #define BFD_MACH_O_REFERENCE_SIZE 4
 276
 277 typedef struct bfd_mach_o_dysymtab_command
 278 {
 279   /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
 280      are grouped into the following three groups:
 281        local symbols (further grouped by the module they are from)
 282        defined external symbols (further grouped by the module they are from)
 283        undefined symbols
 284
 285      The local symbols are used only for debugging.  The dynamic binding
 286      process may have to use them to indicate to the debugger the local
 287      symbols for a module that is being bound.
 288
 289      The last two groups are used by the dynamic binding process to do the
 290      binding (indirectly through the module table and the reference symbol
 291      table when this is a dynamically linked shared library file).  */
 292
 293   unsigned long ilocalsym;    /* Index to local symbols.  */
 294   unsigned long nlocalsym;    /* Number of local symbols.  */
 295   unsigned long iextdefsym;   /* Index to externally defined symbols.  */
 296   unsigned long nextdefsym;   /* Number of externally defined symbols.  */
 297   unsigned long iundefsym;    /* Index to undefined symbols.  */
 298   unsigned long nundefsym;    /* Number of undefined symbols.  */
 299
 300   /* For the for the dynamic binding process to find which module a symbol
 301      is defined in the table of contents is used (analogous to the ranlib
 302      structure in an archive) which maps defined external symbols to modules
 303      they are defined in.  This exists only in a dynamically linked shared
 304      library file.  For executable and object modules the defined external
 305      symbols are sorted by name and is use as the table of contents.  */
 306
 307   unsigned long tocoff;       /* File offset to table of contents.  */
 308   unsigned long ntoc;         /* Number of entries in table of contents.  */
 309
 310   /* To support dynamic binding of "modules" (whole object files) the symbol
 311      table must reflect the modules that the file was created from.  This is
 312      done by having a module table that has indexes and counts into the merged
 313      tables for each module.  The module structure that these two entries
 314      refer to is described below.  This exists only in a dynamically linked
 315      shared library file.  For executable and object modules the file only
 316      contains one module so everything in the file belongs to the module.  */
 317
 318   unsigned long modtaboff;    /* File offset to module table.  */
 319   unsigned long nmodtab;      /* Number of module table entries.  */
 320
 321   /* To support dynamic module binding the module structure for each module
 322      indicates the external references (defined and undefined) each module
 323      makes.  For each module there is an offset and a count into the
 324      reference symbol table for the symbols that the module references.
 325      This exists only in a dynamically linked shared library file.  For
 326      executable and object modules the defined external symbols and the
 327      undefined external symbols indicates the external references.  */
 328
 329   unsigned long extrefsymoff;  /* Offset to referenced symbol table.  */
 330   unsigned long nextrefsyms;   /* Number of referenced symbol table entries.  */
 331
 332   /* The sections that contain "symbol pointers" and "routine stubs" have
 333      indexes and (implied counts based on the size of the section and fixed
 334      size of the entry) into the "indirect symbol" table for each pointer
 335      and stub.  For every section of these two types the index into the
 336      indirect symbol table is stored in the section header in the field
 337      reserved1.  An indirect symbol table entry is simply a 32bit index into
 338      the symbol table to the symbol that the pointer or stub is referring to.
 339      The indirect symbol table is ordered to match the entries in the section.  */
 340
 341   unsigned long indirectsymoff; /* File offset to the indirect symbol table.  */
 342   unsigned long nindirectsyms;  /* Number of indirect symbol table entries.  */
 343
 344   /* To support relocating an individual module in a library file quickly the
 345      external relocation entries for each module in the library need to be
 346      accessed efficiently.  Since the relocation entries can't be accessed
 347      through the section headers for a library file they are separated into
 348      groups of local and external entries further grouped by module.  In this
 349      case the presents of this load command who's extreloff, nextrel,
 350      locreloff and nlocrel fields are non-zero indicates that the relocation
 351      entries of non-merged sections are not referenced through the section
 352      structures (and the reloff and nreloc fields in the section headers are
 353      set to zero).
 354
 355      Since the relocation entries are not accessed through the section headers
 356      this requires the r_address field to be something other than a section
 357      offset to identify the item to be relocated.  In this case r_address is
 358      set to the offset from the vmaddr of the first LC_SEGMENT command.
 359
 360      The relocation entries are grouped by module and the module table
 361      entries have indexes and counts into them for the group of external
 362      relocation entries for that the module.
 363
 364      For sections that are merged across modules there must not be any
 365      remaining external relocation entries for them (for merged sections
 366      remaining relocation entries must be local).  */
 367
 368   unsigned long extreloff;    /* Offset to external relocation entries.  */
 369   unsigned long nextrel;      /* Number of external relocation entries.  */
 370
 371   /* All the local relocation entries are grouped together (they are not
 372      grouped by their module since they are only used if the object is moved
 373      from it statically link edited address).  */
 374
 375   unsigned long locreloff;    /* Offset to local relocation entries.  */
 376   unsigned long nlocrel;      /* Number of local relocation entries.  */
 377
 378   bfd_mach_o_dylib_module *dylib_module;
 379   bfd_mach_o_dylib_table_of_content *dylib_toc;
 380   unsigned int *indirect_syms;
 381   bfd_mach_o_dylib_reference *ext_refs;
 382 }
 383 bfd_mach_o_dysymtab_command;
 384
 385 /* An indirect symbol table entry is simply a 32bit index into the symbol table
 386    to the symbol that the pointer or stub is refering to.  Unless it is for a
 387    non-lazy symbol pointer section for a defined symbol which strip(1) has
 388    removed.  In which case it has the value INDIRECT_SYMBOL_LOCAL.  If the
 389    symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that.  */
 390
 391 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
 392 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS   0x40000000
 393 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE  4
 394
 395 /* For LC_TWOLEVEL_HINTS.  */
 396
 397 typedef struct bfd_mach_o_twolevel_hints_command
 398 {
 399   /* Offset to the hint table.  */
 400   unsigned int offset;
 401
 402   /* Number of entries in the table.  */
 403   unsigned int nhints;
 404 }
 405 bfd_mach_o_twolevel_hints_command;
 406
 407 /* For LC_PREBIND_CKSUM.  */
 408
 409 typedef struct bfd_mach_o_prebind_cksum_command
 410 {
 411   /* Checksum or zero.  */
 412   unsigned int cksum;
 413 }
 414 bfd_mach_o_prebind_cksum_command;
 415
 416 /* For LC_THREAD or LC_UNIXTHREAD.  */
 417
 418 typedef struct bfd_mach_o_thread_flavour
 419 {
 420   unsigned long flavour;
 421   unsigned long offset;
 422   unsigned long size;
 423 }
 424 bfd_mach_o_thread_flavour;
 425
 426 typedef struct bfd_mach_o_thread_command
 427 {
 428   unsigned long nflavours;
 429   bfd_mach_o_thread_flavour *flavours;
 430   asection *section;
 431 }
 432 bfd_mach_o_thread_command;
 433
 434 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER.  */
 435
 436 typedef struct bfd_mach_o_dylinker_command
 437 {
 438   unsigned int name_offset;         /* Offset to library's path name.  */
 439   char *name_str;
 440 }
 441 bfd_mach_o_dylinker_command;
 442
 443 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
 444    or LC_REEXPORT_DYLIB.  */
 445
 446 typedef struct bfd_mach_o_dylib_command
 447 {
 448   unsigned int name_offset;            /* Offset to library's path name.  */
 449   unsigned long timestamp;             /* Library's build time stamp.  */
 450   unsigned long current_version;       /* Library's current version number.  */
 451   unsigned long compatibility_version; /* Library's compatibility vers number.  */
 452   char *name_str;
 453 }
 454 bfd_mach_o_dylib_command;
 455
 456 /* For LC_PREBOUND_DYLIB.  */
 457
 458 typedef struct bfd_mach_o_prebound_dylib_command
 459 {
 460   unsigned int name_offset;           /* Library's path name.  */
 461   unsigned int nmodules;              /* Number of modules in library.  */
 462   unsigned int linked_modules_offset; /* Bit vector of linked modules.  */
 463
 464   char *name_str;
 465   unsigned char *linked_modules;
 466 }
 467 bfd_mach_o_prebound_dylib_command;
 468
 469 /* For LC_UUID.  */
 470
 471 typedef struct bfd_mach_o_uuid_command
 472 {
 473   unsigned char uuid[16];
 474 }
 475 bfd_mach_o_uuid_command;
 476
 477 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO.  */
 478
 479 typedef struct bfd_mach_o_linkedit_command
 480 {
 481   unsigned long dataoff;
 482   unsigned long datasize;
 483 }
 484 bfd_mach_o_linkedit_command;
 485
 486 typedef struct bfd_mach_o_str_command
 487 {
 488   unsigned long stroff;
 489   unsigned long str_len;
 490   char *str;
 491 }
 492 bfd_mach_o_str_command;
 493
 494 typedef struct bfd_mach_o_fvmlib_command
 495 {
 496   unsigned int name_offset;
 497   char *name_str;
 498   unsigned int minor_version;
 499   unsigned int header_addr;
 500 }
 501 bfd_mach_o_fvmlib_command;
 502
 503 typedef struct bfd_mach_o_dyld_info_command
 504 {
 505   /* File offset and size to rebase info.  */
 506   unsigned int rebase_off;
 507   unsigned int rebase_size;
 508   unsigned char *rebase_content;
 509
 510   /* File offset and size of binding info.  */
 511   unsigned int bind_off;
 512   unsigned int bind_size;
 513   unsigned char *bind_content;
 514
 515   /* File offset and size of weak binding info.  */
 516   unsigned int weak_bind_off;
 517   unsigned int weak_bind_size;
 518   unsigned char *weak_bind_content;
 519
 520   /* File offset and size of lazy binding info.  */
 521   unsigned int lazy_bind_off;
 522   unsigned int lazy_bind_size;
 523   unsigned char *lazy_bind_content;
 524
 525   /* File offset and size of export info.  */
 526   unsigned int export_off;
 527   unsigned int export_size;
 528   unsigned char *export_content;
 529 }
 530 bfd_mach_o_dyld_info_command;
 531
 532 typedef struct bfd_mach_o_version_min_command
 533 {
 534   uint32_t version;
 535   uint32_t sdk;
 536 }
 537 bfd_mach_o_version_min_command;
 538
 539 typedef struct bfd_mach_o_encryption_info_command
 540 {
 541   unsigned int cryptoff;
 542   unsigned int cryptsize;
 543   unsigned int cryptid;
 544 }
 545 bfd_mach_o_encryption_info_command;
 546
 547 typedef struct bfd_mach_o_main_command
 548 {
 549   bfd_uint64_t entryoff;
 550   bfd_uint64_t stacksize;
 551 }
 552 bfd_mach_o_main_command;
 553
 554 typedef struct bfd_mach_o_source_version_command
 555 {
 556   unsigned int a;
 557   unsigned short b;
 558   unsigned short c;
 559   unsigned short d;
 560   unsigned short e;
 561 }
 562 bfd_mach_o_source_version_command;
 563
 564 typedef struct bfd_mach_o_note_command
 565 {
 566   char data_owner[16];
 567   bfd_uint64_t offset;
 568   bfd_uint64_t size;
 569 }
 570 bfd_mach_o_note_command;
 571
 572 typedef struct bfd_mach_o_build_version_tool
 573 {
 574   uint32_t tool;
 575   uint32_t version;
 576 }
 577 bfd_mach_o_build_version_tool;
 578
 579 typedef struct bfd_mach_o_build_version_command
 580 {
 581   uint32_t platform;
 582   uint32_t minos;
 583   uint32_t sdk;
 584   uint32_t ntools;
 585 }
 586 bfd_mach_o_build_version_command;
 587
 588 typedef struct bfd_mach_o_load_command
 589 {
 590   /* Next command in the single linked list.  */
 591   struct bfd_mach_o_load_command *next;
 592
 593   /* Type and required flag.  */
 594   bfd_mach_o_load_command_type type;
 595   bfd_boolean type_required;
 596
 597   /* Offset and length in the file.  */
 598   unsigned int offset;
 599   unsigned int len;
 600
 601   union
 602   {
 603     bfd_mach_o_segment_command segment;
 604     bfd_mach_o_symtab_command symtab;
 605     bfd_mach_o_dysymtab_command dysymtab;
 606     bfd_mach_o_thread_command thread;
 607     bfd_mach_o_dylib_command dylib;
 608     bfd_mach_o_dylinker_command dylinker;
 609     bfd_mach_o_prebound_dylib_command prebound_dylib;
 610     bfd_mach_o_prebind_cksum_command prebind_cksum;
 611     bfd_mach_o_twolevel_hints_command twolevel_hints;
 612     bfd_mach_o_uuid_command uuid;
 613     bfd_mach_o_linkedit_command linkedit;
 614     bfd_mach_o_str_command str;
 615     bfd_mach_o_dyld_info_command dyld_info;
 616     bfd_mach_o_version_min_command version_min;
 617     bfd_mach_o_encryption_info_command encryption_info;
 618     bfd_mach_o_fvmlib_command fvmlib;
 619     bfd_mach_o_main_command main;
 620     bfd_mach_o_source_version_command source_version;
 621     bfd_mach_o_note_command note;
 622     bfd_mach_o_build_version_command build_version;
 623   } command;
 624 }
 625 bfd_mach_o_load_command;
 626
 627 typedef struct mach_o_data_struct
 628 {
 629   /* Mach-O header.  */
 630   bfd_mach_o_header header;
 631
 632   /* File offset of the header.  Usually this is 0.  */
 633   file_ptr hdr_offset;
 634
 635   /* Array of load commands (length is given by header.ncmds).  */
 636   bfd_mach_o_load_command *first_command;
 637   bfd_mach_o_load_command *last_command;
 638
 639   /* Flatten array of sections.  The array is 0-based.  */
 640   unsigned long nsects;
 641   bfd_mach_o_section **sections;
 642
 643   /* Used while writing: current length of the output file.  This is used
 644      to allocate space in the file.  */
 645   ufile_ptr filelen;
 646
 647   /* As symtab is referenced by other load command, it is handy to have
 648      a direct access to it.  Although it is not clearly stated, only one symtab
 649      is expected.  */
 650   bfd_mach_o_symtab_command *symtab;
 651   bfd_mach_o_dysymtab_command *dysymtab;
 652
 653   /* A place to stash dwarf2 info for this bfd.  */
 654   void *dwarf2_find_line_info;
 655
 656   /* BFD of .dSYM file.  */
 657   bfd *dsym_bfd;
 658
 659   /* Cache of dynamic relocs.  */
 660   arelent *dyn_reloc_cache;
 661 }
 662 bfd_mach_o_data_struct;
 663
 664 typedef struct bfd_mach_o_xlat_name
 665 {
 666   const char *name;
 667   unsigned long val;
 668 }
 669 bfd_mach_o_xlat_name;
 670
 671 /* Target specific routines.  */
 672
 673 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
 674 #define bfd_mach_o_get_backend_data(abfd) \
 675   ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
 676
 677 /* Get the Mach-O header for section SEC.  */
 678 #define bfd_mach_o_get_mach_o_section(sec) \
 679   ((bfd_mach_o_section *)(sec)->used_by_bfd)
 680
 681 bfd_boolean bfd_mach_o_valid (bfd *);
 682 bfd_boolean bfd_mach_o_mkobject_init (bfd *);
 683 const bfd_target *bfd_mach_o_object_p (bfd *);
 684 const bfd_target *bfd_mach_o_core_p (bfd *);
 685 const bfd_target *bfd_mach_o_fat_archive_p (bfd *);
 686 bfd *bfd_mach_o_fat_openr_next_archived_file (bfd *, bfd *);
 687 bfd_boolean bfd_mach_o_set_arch_mach (bfd *, enum bfd_architecture,
 688                                       unsigned long);
 689 int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
 690 bfd_boolean bfd_mach_o_new_section_hook (bfd *, asection *);
 691 bfd_boolean bfd_mach_o_write_contents (bfd *);
 692 bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *,
 693                                                      bfd *, asymbol *);
 694 bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
 695                                                       bfd *, asection *);
 696 bfd_boolean bfd_mach_o_bfd_copy_private_header_data (bfd *, bfd *);
 697 bfd_boolean bfd_mach_o_bfd_set_private_flags (bfd *, flagword);
 698 bfd_boolean bfd_mach_o_bfd_print_private_bfd_data (bfd *, void *);
 699 long bfd_mach_o_get_symtab_upper_bound (bfd *);
 700 long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
 701 long bfd_mach_o_get_synthetic_symtab (bfd *, long, asymbol **, long,
 702                                       asymbol **, asymbol **ret);
 703 long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *);
 704 long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **);
 705 long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *);
 706 long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **);
 707 asymbol *bfd_mach_o_make_empty_symbol (bfd *);
 708 void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
 709 void bfd_mach_o_print_symbol (bfd *, void *, asymbol *, bfd_print_symbol_type);
 710 int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *);
 711 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type);
 712 int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *);
 713 char *bfd_mach_o_core_file_failing_command (bfd *);
 714 int bfd_mach_o_core_file_failing_signal (bfd *);
 715 bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *);
 716 bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *);
 717 const bfd_target *bfd_mach_o_header_p (bfd *, file_ptr, bfd_mach_o_filetype,
 718                                        bfd_mach_o_cpu_type);
 719 bfd_boolean bfd_mach_o_build_commands (bfd *);
 720 bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
 721                                              file_ptr, bfd_size_type);
 722 unsigned int bfd_mach_o_version (bfd *);
 723
 724 unsigned int bfd_mach_o_get_section_type_from_name (bfd *, const char *);
 725 unsigned int bfd_mach_o_get_section_attribute_from_name (const char *);
 726
 727 void bfd_mach_o_convert_section_name_to_bfd (bfd *, const char *, const char *,
 728                                              const char **, flagword *);
 729 bfd_boolean bfd_mach_o_find_nearest_line (bfd *, asymbol **,
 730                                           asection *, bfd_vma,
 731                                           const char **, const char **,
 732                                           unsigned int *, unsigned int *);
 733 #define bfd_mach_o_find_line _bfd_nosymbols_find_line
 734 bfd_boolean bfd_mach_o_close_and_cleanup (bfd *);
 735 bfd_boolean bfd_mach_o_free_cached_info (bfd *);
 736
 737 unsigned int bfd_mach_o_section_get_nbr_indirect (bfd *, bfd_mach_o_section *);
 738 unsigned int bfd_mach_o_section_get_entry_size (bfd *, bfd_mach_o_section *);
 739 bfd_boolean bfd_mach_o_read_symtab_symbols (bfd *);
 740 bfd_boolean bfd_mach_o_read_symtab_strtab (bfd *abfd);
 741
 742 bfd_vma bfd_mach_o_get_base_address (bfd *);
 743
 744 void bfd_mach_o_swap_in_non_scattered_reloc (bfd *, bfd_mach_o_reloc_info *,
 745                                              unsigned char *);
 746 bfd_boolean bfd_mach_o_canonicalize_non_scattered_reloc (bfd *, bfd_mach_o_reloc_info *, arelent *, asymbol **);
 747 bfd_boolean bfd_mach_o_pre_canonicalize_one_reloc (bfd *, struct mach_o_reloc_info_external *, bfd_mach_o_reloc_info *, arelent *, asymbol **);
 748
 749 /* A placeholder in case we need to suppress emitting the dysymtab for some
 750    reason (e.g. compatibility with older system versions).  */
 751 #define bfd_mach_o_should_emit_dysymtab(x) TRUE
 752
 753 extern const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[];
 754 extern const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[];
 755
 756 extern const bfd_target mach_o_fat_vec;
 757
 758 /* Interfaces between BFD names and Mach-O names.  */
 759
 760 typedef struct mach_o_section_name_xlat
 761 {
 762   const char *bfd_name;
 763   const char *mach_o_name;
 764   flagword bfd_flags;
 765   unsigned int macho_sectype;
 766   unsigned int macho_secattr;
 767   unsigned int sectalign;
 768 } mach_o_section_name_xlat;
 769
 770 typedef struct mach_o_segment_name_xlat
 771 {
 772   const char *segname;
 773   const mach_o_section_name_xlat *sections;
 774 } mach_o_segment_name_xlat;
 775
 776 const mach_o_section_name_xlat *
 777 bfd_mach_o_section_data_for_mach_sect (bfd *, const char *, const char *);
 778 const mach_o_section_name_xlat *
 779 bfd_mach_o_section_data_for_bfd_name (bfd *, const char *, const char **);
 780
 781 typedef struct bfd_mach_o_backend_data
 782 {
 783   enum bfd_architecture arch;
 784   bfd_vma page_size;
 785   bfd_boolean (*_bfd_mach_o_canonicalize_one_reloc)
 786   (bfd *, struct mach_o_reloc_info_external *, arelent *, asymbol **, arelent *);
 787   bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
 788   bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
 789                                           void *, char *);
 790   const mach_o_segment_name_xlat *segsec_names_xlat;
 791   bfd_boolean (*bfd_mach_o_section_type_valid_for_target) (unsigned long);
 792 }
 793 bfd_mach_o_backend_data;
 794
 795 /* Values used in symbol.udata.i, to signal that the mach-o-specific data in the
 796    symbol are not yet set, or need validation (where this is possible).  */
 797
 798 #define SYM_MACHO_FIELDS_UNSET ((bfd_vma) -1)
 799 #define SYM_MACHO_FIELDS_NOT_VALIDATED ((bfd_vma) -2)
 800
 801 #ifdef __cplusplus
 802 }
 803 #endif
 804
 805 #endif /* _BFD_MACH_O_H_ */