bfd/mach-o.h

   1 /* Mach-O support for BFD.
   2    Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008, 2009, 2011,
   3    2012
   4    Free Software Foundation, Inc.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #ifndef _BFD_MACH_O_H_
  24 #define _BFD_MACH_O_H_
  25
  26 #include "sysdep.h"
  27 #include "bfd.h"
  28 #include "mach-o/loader.h"
  29
  30 typedef struct bfd_mach_o_header
  31 {
  32   unsigned long magic;
  33   unsigned long cputype;
  34   unsigned long cpusubtype;
  35   unsigned long filetype;
  36   unsigned long ncmds;
  37   unsigned long sizeofcmds;
  38   unsigned long flags;
  39   unsigned int reserved;
  40   /* Version 1: 32 bits, version 2: 64 bits.  */
  41   unsigned int version;
  42   enum bfd_endian byteorder;
  43 }
  44 bfd_mach_o_header;
  45
  46 typedef struct bfd_mach_o_asymbol
  47 {
  48   /* The actual symbol which the rest of BFD works with.  */
  49   asymbol symbol;
  50
  51   /* Mach-O symbol fields.  */
  52   unsigned char n_type;
  53   unsigned char n_sect;
  54   unsigned short n_desc;
  55 }
  56 bfd_mach_o_asymbol;
  57
  58 #define BFD_MACH_O_SEGNAME_SIZE 16
  59 #define BFD_MACH_O_SECTNAME_SIZE 16
  60
  61 typedef struct bfd_mach_o_section
  62 {
  63   /* Fields present in the file.  */
  64   char sectname[BFD_MACH_O_SECTNAME_SIZE + 1];  /* Always NUL padded.  */
  65   char segname[BFD_MACH_O_SEGNAME_SIZE + 1];
  66   bfd_vma addr;
  67   bfd_vma size;
  68   bfd_vma offset;
  69   unsigned long align;
  70   bfd_vma reloff;
  71   unsigned long nreloc;
  72   unsigned long flags;
  73   unsigned long reserved1;
  74   unsigned long reserved2;
  75   unsigned long reserved3;
  76
  77   /* Corresponding bfd section.  */
  78   asection *bfdsection;
  79
  80   /* An array holding the indirect symbols for this section.
  81      NULL values indicate local symbols.
  82      The number of symbols is determined from the section size and type.  */
  83
  84   bfd_mach_o_asymbol **indirect_syms;
  85
  86   /* Simply linked list.  */
  87   struct bfd_mach_o_section *next;
  88 }
  89 bfd_mach_o_section;
  90
  91 typedef struct bfd_mach_o_segment_command
  92 {
  93   char segname[BFD_MACH_O_SEGNAME_SIZE + 1];
  94   bfd_vma vmaddr;
  95   bfd_vma vmsize;
  96   bfd_vma fileoff;
  97   unsigned long filesize;
  98   unsigned long maxprot;        /* Maximum permitted protection.  */
  99   unsigned long initprot;       /* Initial protection.  */
 100   unsigned long nsects;
 101   unsigned long flags;
 102
 103   /* Linked list of sections.  */
 104   bfd_mach_o_section *sect_head;
 105   bfd_mach_o_section *sect_tail;
 106 }
 107 bfd_mach_o_segment_command;
 108
 109 /* Protection flags.  */
 110 #define BFD_MACH_O_PROT_READ    0x01
 111 #define BFD_MACH_O_PROT_WRITE   0x02
 112 #define BFD_MACH_O_PROT_EXECUTE 0x04
 113
 114 /* Expanded internal representation of a relocation entry.  */
 115 typedef struct bfd_mach_o_reloc_info
 116 {
 117   bfd_vma r_address;
 118   bfd_vma r_value;
 119   unsigned int r_scattered : 1;
 120   unsigned int r_type : 4;
 121   unsigned int r_pcrel : 1;
 122   unsigned int r_length : 2;
 123   unsigned int r_extern : 1;
 124 }
 125 bfd_mach_o_reloc_info;
 126
 127 /* The symbol table is sorted like this:
 128  (1) local.
 129         (otherwise in order of generation)
 130  (2) external defined
 131         (sorted by name)
 132  (3) external undefined / common
 133         (sorted by name)
 134 */
 135
 136 typedef struct bfd_mach_o_symtab_command
 137 {
 138   unsigned int symoff;
 139   unsigned int nsyms;
 140   unsigned int stroff;
 141   unsigned int strsize;
 142   bfd_mach_o_asymbol *symbols;
 143   char *strtab;
 144 }
 145 bfd_mach_o_symtab_command;
 146
 147 /* This is the second set of the symbolic information which is used to support
 148    the data structures for the dynamically link editor.
 149
 150    The original set of symbolic information in the symtab_command which contains
 151    the symbol and string tables must also be present when this load command is
 152    present.  When this load command is present the symbol table is organized
 153    into three groups of symbols:
 154        local symbols (static and debugging symbols) - grouped by module
 155        defined external symbols - grouped by module (sorted by name if not lib)
 156        undefined external symbols (sorted by name)
 157    In this load command there are offsets and counts to each of the three groups
 158    of symbols.
 159
 160    This load command contains a the offsets and sizes of the following new
 161    symbolic information tables:
 162        table of contents
 163        module table
 164        reference symbol table
 165        indirect symbol table
 166    The first three tables above (the table of contents, module table and
 167    reference symbol table) are only present if the file is a dynamically linked
 168    shared library.  For executable and object modules, which are files
 169    containing only one module, the information that would be in these three
 170    tables is determined as follows:
 171        table of contents - the defined external symbols are sorted by name
 172        module table - the file contains only one module so everything in the
 173                       file is part of the module.
 174        reference symbol table - is the defined and undefined external symbols
 175
 176    For dynamically linked shared library files this load command also contains
 177    offsets and sizes to the pool of relocation entries for all sections
 178    separated into two groups:
 179        external relocation entries
 180        local relocation entries
 181    For executable and object modules the relocation entries continue to hang
 182    off the section structures.  */
 183
 184 typedef struct bfd_mach_o_dylib_module
 185 {
 186   /* Index into the string table indicating the name of the module.  */
 187   unsigned long module_name_idx;
 188   char *module_name;
 189
 190   /* Index into the symbol table of the first defined external symbol provided
 191      by the module.  */
 192   unsigned long iextdefsym;
 193
 194   /* Number of external symbols provided by this module.  */
 195   unsigned long nextdefsym;
 196
 197   /* Index into the external reference table of the first entry
 198      provided by this module.  */
 199   unsigned long irefsym;
 200
 201   /* Number of external reference entries provided by this module.  */
 202   unsigned long nrefsym;
 203
 204   /* Index into the symbol table of the first local symbol provided by this
 205      module.  */
 206   unsigned long ilocalsym;
 207
 208   /* Number of local symbols provided by this module.  */
 209   unsigned long nlocalsym;
 210
 211   /* Index into the external relocation table of the first entry provided
 212      by this module.  */
 213   unsigned long iextrel;
 214
 215   /* Number of external relocation entries provided by this module.  */
 216   unsigned long nextrel;
 217
 218   /* Index in the module initialization section to the pointers for this
 219      module.  */
 220   unsigned short iinit;
 221
 222   /* Index in the module termination section to the pointers for this
 223      module.  */
 224   unsigned short iterm;
 225
 226   /* Number of pointers in the module initialization for this module.  */
 227   unsigned short ninit;
 228
 229   /* Number of pointers in the module termination for this module.  */
 230   unsigned short nterm;
 231
 232   /* Number of data byte for this module that are used in the __module_info
 233      section of the __OBJC segment.  */
 234   unsigned long objc_module_info_size;
 235
 236   /* Statically linked address of the start of the data for this module
 237      in the __module_info section of the __OBJC_segment.  */
 238   bfd_vma objc_module_info_addr;
 239 }
 240 bfd_mach_o_dylib_module;
 241
 242 typedef struct bfd_mach_o_dylib_table_of_content
 243 {
 244   /* Index into the symbol table to the defined external symbol.  */
 245   unsigned long symbol_index;
 246
 247   /* Index into the module table to the module for this entry.  */
 248   unsigned long module_index;
 249 }
 250 bfd_mach_o_dylib_table_of_content;
 251
 252 typedef struct bfd_mach_o_dylib_reference
 253 {
 254   /* Index into the symbol table for the symbol being referenced.  */
 255   unsigned long isym;
 256
 257   /* Type of the reference being made (use REFERENCE_FLAGS constants).  */
 258   unsigned long flags;
 259 }
 260 bfd_mach_o_dylib_reference;
 261 #define BFD_MACH_O_REFERENCE_SIZE 4
 262
 263 typedef struct bfd_mach_o_dysymtab_command
 264 {
 265   /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
 266      are grouped into the following three groups:
 267        local symbols (further grouped by the module they are from)
 268        defined external symbols (further grouped by the module they are from)
 269        undefined symbols
 270
 271      The local symbols are used only for debugging.  The dynamic binding
 272      process may have to use them to indicate to the debugger the local
 273      symbols for a module that is being bound.
 274
 275      The last two groups are used by the dynamic binding process to do the
 276      binding (indirectly through the module table and the reference symbol
 277      table when this is a dynamically linked shared library file).  */
 278
 279   unsigned long ilocalsym;    /* Index to local symbols.  */
 280   unsigned long nlocalsym;    /* Number of local symbols.  */
 281   unsigned long iextdefsym;   /* Index to externally defined symbols.  */
 282   unsigned long nextdefsym;   /* Number of externally defined symbols.  */
 283   unsigned long iundefsym;    /* Index to undefined symbols.  */
 284   unsigned long nundefsym;    /* Number of undefined symbols.  */
 285
 286   /* For the for the dynamic binding process to find which module a symbol
 287      is defined in the table of contents is used (analogous to the ranlib
 288      structure in an archive) which maps defined external symbols to modules
 289      they are defined in.  This exists only in a dynamically linked shared
 290      library file.  For executable and object modules the defined external
 291      symbols are sorted by name and is use as the table of contents.  */
 292
 293   unsigned long tocoff;       /* File offset to table of contents.  */
 294   unsigned long ntoc;         /* Number of entries in table of contents.  */
 295
 296   /* To support dynamic binding of "modules" (whole object files) the symbol
 297      table must reflect the modules that the file was created from.  This is
 298      done by having a module table that has indexes and counts into the merged
 299      tables for each module.  The module structure that these two entries
 300      refer to is described below.  This exists only in a dynamically linked
 301      shared library file.  For executable and object modules the file only
 302      contains one module so everything in the file belongs to the module.  */
 303
 304   unsigned long modtaboff;    /* File offset to module table.  */
 305   unsigned long nmodtab;      /* Number of module table entries.  */
 306
 307   /* To support dynamic module binding the module structure for each module
 308      indicates the external references (defined and undefined) each module
 309      makes.  For each module there is an offset and a count into the
 310      reference symbol table for the symbols that the module references.
 311      This exists only in a dynamically linked shared library file.  For
 312      executable and object modules the defined external symbols and the
 313      undefined external symbols indicates the external references.  */
 314
 315   unsigned long extrefsymoff;  /* Offset to referenced symbol table.  */
 316   unsigned long nextrefsyms;   /* Number of referenced symbol table entries.  */
 317
 318   /* The sections that contain "symbol pointers" and "routine stubs" have
 319      indexes and (implied counts based on the size of the section and fixed
 320      size of the entry) into the "indirect symbol" table for each pointer
 321      and stub.  For every section of these two types the index into the
 322      indirect symbol table is stored in the section header in the field
 323      reserved1.  An indirect symbol table entry is simply a 32bit index into
 324      the symbol table to the symbol that the pointer or stub is referring to.
 325      The indirect symbol table is ordered to match the entries in the section.  */
 326
 327   unsigned long indirectsymoff; /* File offset to the indirect symbol table.  */
 328   unsigned long nindirectsyms;  /* Number of indirect symbol table entries.  */
 329
 330   /* To support relocating an individual module in a library file quickly the
 331      external relocation entries for each module in the library need to be
 332      accessed efficiently.  Since the relocation entries can't be accessed
 333      through the section headers for a library file they are separated into
 334      groups of local and external entries further grouped by module.  In this
 335      case the presents of this load command who's extreloff, nextrel,
 336      locreloff and nlocrel fields are non-zero indicates that the relocation
 337      entries of non-merged sections are not referenced through the section
 338      structures (and the reloff and nreloc fields in the section headers are
 339      set to zero).
 340
 341      Since the relocation entries are not accessed through the section headers
 342      this requires the r_address field to be something other than a section
 343      offset to identify the item to be relocated.  In this case r_address is
 344      set to the offset from the vmaddr of the first LC_SEGMENT command.
 345
 346      The relocation entries are grouped by module and the module table
 347      entries have indexes and counts into them for the group of external
 348      relocation entries for that the module.
 349
 350      For sections that are merged across modules there must not be any
 351      remaining external relocation entries for them (for merged sections
 352      remaining relocation entries must be local).  */
 353
 354   unsigned long extreloff;    /* Offset to external relocation entries.  */
 355   unsigned long nextrel;      /* Number of external relocation entries.  */
 356
 357   /* All the local relocation entries are grouped together (they are not
 358      grouped by their module since they are only used if the object is moved
 359      from it statically link edited address).  */
 360
 361   unsigned long locreloff;    /* Offset to local relocation entries.  */
 362   unsigned long nlocrel;      /* Number of local relocation entries.  */
 363
 364   bfd_mach_o_dylib_module *dylib_module;
 365   bfd_mach_o_dylib_table_of_content *dylib_toc;
 366   unsigned int *indirect_syms;
 367   bfd_mach_o_dylib_reference *ext_refs;
 368 }
 369 bfd_mach_o_dysymtab_command;
 370
 371 /* An indirect symbol table entry is simply a 32bit index into the symbol table
 372    to the symbol that the pointer or stub is refering to.  Unless it is for a
 373    non-lazy symbol pointer section for a defined symbol which strip(1) has
 374    removed.  In which case it has the value INDIRECT_SYMBOL_LOCAL.  If the
 375    symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that.  */
 376
 377 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
 378 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS   0x40000000
 379 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE  4
 380
 381 /* For LC_THREAD or LC_UNIXTHREAD.  */
 382
 383 typedef struct bfd_mach_o_thread_flavour
 384 {
 385   unsigned long flavour;
 386   unsigned long offset;
 387   unsigned long size;
 388 }
 389 bfd_mach_o_thread_flavour;
 390
 391 typedef struct bfd_mach_o_thread_command
 392 {
 393   unsigned long nflavours;
 394   bfd_mach_o_thread_flavour *flavours;
 395   asection *section;
 396 }
 397 bfd_mach_o_thread_command;
 398
 399 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER.  */
 400
 401 typedef struct bfd_mach_o_dylinker_command
 402 {
 403   unsigned long name_offset;         /* Offset to library's path name.  */
 404   unsigned long name_len;            /* Offset to library's path name.  */
 405   char *name_str;
 406 }
 407 bfd_mach_o_dylinker_command;
 408
 409 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
 410    or LC_REEXPORT_DYLIB.  */
 411
 412 typedef struct bfd_mach_o_dylib_command
 413 {
 414   unsigned long name_offset;           /* Offset to library's path name.  */
 415   unsigned long name_len;              /* Offset to library's path name.  */
 416   unsigned long timestamp;             /* Library's build time stamp.  */
 417   unsigned long current_version;       /* Library's current version number.  */
 418   unsigned long compatibility_version; /* Library's compatibility vers number.  */
 419   char *name_str;
 420 }
 421 bfd_mach_o_dylib_command;
 422
 423 /* For LC_PREBOUND_DYLIB.  */
 424
 425 typedef struct bfd_mach_o_prebound_dylib_command
 426 {
 427   unsigned long name;                /* Library's path name.  */
 428   unsigned long nmodules;            /* Number of modules in library.  */
 429   unsigned long linked_modules;      /* Bit vector of linked modules.  */
 430 }
 431 bfd_mach_o_prebound_dylib_command;
 432
 433 /* For LC_UUID.  */
 434
 435 typedef struct bfd_mach_o_uuid_command
 436 {
 437   unsigned char uuid[16];
 438 }
 439 bfd_mach_o_uuid_command;
 440
 441 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO.  */
 442
 443 typedef struct bfd_mach_o_linkedit_command
 444 {
 445   unsigned long dataoff;
 446   unsigned long datasize;
 447 }
 448 bfd_mach_o_linkedit_command;
 449
 450 typedef struct bfd_mach_o_str_command
 451 {
 452   unsigned long stroff;
 453   unsigned long str_len;
 454   char *str;
 455 }
 456 bfd_mach_o_str_command;
 457
 458 typedef struct bfd_mach_o_fvmlib_command
 459 {
 460   unsigned int name_offset;
 461   unsigned int name_len;
 462   char *name_str;
 463   unsigned int minor_version;
 464   unsigned int header_addr;
 465 }
 466 bfd_mach_o_fvmlib_command;
 467
 468 typedef struct bfd_mach_o_dyld_info_command
 469 {
 470   /* File offset and size to rebase info.  */
 471   unsigned int rebase_off;
 472   unsigned int rebase_size;
 473
 474   /* File offset and size of binding info.  */
 475   unsigned int bind_off;
 476   unsigned int bind_size;
 477
 478   /* File offset and size of weak binding info.  */
 479   unsigned int weak_bind_off;
 480   unsigned int weak_bind_size;
 481
 482   /* File offset and size of lazy binding info.  */
 483   unsigned int lazy_bind_off;
 484   unsigned int lazy_bind_size;
 485
 486   /* File offset and size of export info.  */
 487   unsigned int export_off;
 488   unsigned int export_size;
 489 }
 490 bfd_mach_o_dyld_info_command;
 491
 492 typedef struct bfd_mach_o_version_min_command
 493 {
 494   unsigned char rel;
 495   unsigned char maj;
 496   unsigned char min;
 497   unsigned int reserved;
 498 }
 499 bfd_mach_o_version_min_command;
 500
 501 typedef struct bfd_mach_o_encryption_info_command
 502 {
 503   unsigned int cryptoff;
 504   unsigned int cryptsize;
 505   unsigned int cryptid;
 506 }
 507 bfd_mach_o_encryption_info_command;
 508
 509 typedef struct bfd_mach_o_load_command
 510 {
 511   bfd_mach_o_load_command_type type;
 512   bfd_boolean type_required;
 513   unsigned int offset;
 514   unsigned int len;
 515   union
 516   {
 517     bfd_mach_o_segment_command segment;
 518     bfd_mach_o_symtab_command symtab;
 519     bfd_mach_o_dysymtab_command dysymtab;
 520     bfd_mach_o_thread_command thread;
 521     bfd_mach_o_dylib_command dylib;
 522     bfd_mach_o_dylinker_command dylinker;
 523     bfd_mach_o_prebound_dylib_command prebound_dylib;
 524     bfd_mach_o_uuid_command uuid;
 525     bfd_mach_o_linkedit_command linkedit;
 526     bfd_mach_o_str_command str;
 527     bfd_mach_o_dyld_info_command dyld_info;
 528     bfd_mach_o_version_min_command version_min;
 529     bfd_mach_o_encryption_info_command encryption_info;
 530     bfd_mach_o_fvmlib_command fvmlib;
 531   }
 532   command;
 533 }
 534 bfd_mach_o_load_command;
 535
 536 typedef struct mach_o_data_struct
 537 {
 538   /* Mach-O header.  */
 539   bfd_mach_o_header header;
 540   /* Array of load commands (length is given by header.ncmds).  */
 541   bfd_mach_o_load_command *commands;
 542
 543   /* Flatten array of sections.  The array is 0-based.  */
 544   unsigned long nsects;
 545   bfd_mach_o_section **sections;
 546
 547   /* Used while writing: current length of the output file.  This is used
 548      to allocate space in the file.  */
 549   ufile_ptr filelen;
 550
 551   /* As symtab is referenced by other load command, it is handy to have
 552      a direct access to it.  Although it is not clearly stated, only one symtab
 553      is expected.  */
 554   bfd_mach_o_symtab_command *symtab;
 555   bfd_mach_o_dysymtab_command *dysymtab;
 556
 557   /* A place to stash dwarf2 info for this bfd.  */
 558   void *dwarf2_find_line_info;
 559
 560   /* BFD of .dSYM file. */
 561   bfd *dsym_bfd;
 562
 563   /* Cache of dynamic relocs. */
 564   arelent *dyn_reloc_cache;
 565 }
 566 bfd_mach_o_data_struct;
 567
 568 typedef struct bfd_mach_o_xlat_name
 569 {
 570   const char *name;
 571   unsigned long val;
 572 }
 573 bfd_mach_o_xlat_name;
 574
 575 /* Target specific routines.  */
 576
 577 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
 578 #define bfd_mach_o_get_backend_data(abfd) \
 579   ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
 580
 581 /* Get the Mach-O header for section SEC.  */
 582 #define bfd_mach_o_get_mach_o_section(sec) \
 583   ((bfd_mach_o_section *)(sec)->used_by_bfd)
 584
 585 bfd_boolean bfd_mach_o_valid (bfd *);
 586 bfd_boolean bfd_mach_o_mkobject_init (bfd *);
 587 const bfd_target *bfd_mach_o_object_p (bfd *);
 588 const bfd_target *bfd_mach_o_core_p (bfd *);
 589 const bfd_target *bfd_mach_o_archive_p (bfd *);
 590 bfd *bfd_mach_o_openr_next_archived_file (bfd *, bfd *);
 591 bfd_boolean bfd_mach_o_set_arch_mach (bfd *, enum bfd_architecture,
 592                                       unsigned long);
 593 int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
 594 bfd_boolean bfd_mach_o_new_section_hook (bfd *, asection *);
 595 bfd_boolean bfd_mach_o_write_contents (bfd *);
 596 bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *,
 597                                                      bfd *, asymbol *);
 598 bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
 599                                                       bfd *, asection *);
 600 bfd_boolean bfd_mach_o_bfd_copy_private_bfd_data (bfd *, bfd *);
 601 bfd_boolean bfd_mach_o_bfd_set_private_flags (bfd *, flagword);
 602 long bfd_mach_o_get_symtab_upper_bound (bfd *);
 603 long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
 604 long bfd_mach_o_get_synthetic_symtab (bfd *, long, asymbol **, long,
 605                                       asymbol **, asymbol **ret);
 606 long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *);
 607 long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **);
 608 long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *);
 609 long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **);
 610 asymbol *bfd_mach_o_make_empty_symbol (bfd *);
 611 void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
 612 void bfd_mach_o_print_symbol (bfd *, PTR, asymbol *, bfd_print_symbol_type);
 613 int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *);
 614 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type);
 615 int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *);
 616 char *bfd_mach_o_core_file_failing_command (bfd *);
 617 int bfd_mach_o_core_file_failing_signal (bfd *);
 618 bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *);
 619 bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *);
 620 const bfd_target *bfd_mach_o_header_p (bfd *, bfd_mach_o_filetype,
 621                                        bfd_mach_o_cpu_type);
 622 bfd_boolean bfd_mach_o_build_commands (bfd *);
 623 bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
 624                                              file_ptr, bfd_size_type);
 625 unsigned int bfd_mach_o_version (bfd *);
 626
 627 unsigned int bfd_mach_o_get_section_type_from_name (bfd *, const char *);
 628 unsigned int bfd_mach_o_get_section_attribute_from_name (const char *);
 629
 630 void bfd_mach_o_convert_section_name_to_bfd (bfd *, const char *, const char *,
 631                                              const char **, flagword *);
 632 bfd_boolean bfd_mach_o_find_nearest_line (bfd *, asection *, asymbol **,
 633                                           bfd_vma, const char **,
 634                                           const char **, unsigned int *);
 635 bfd_boolean bfd_mach_o_close_and_cleanup (bfd *);
 636 bfd_boolean bfd_mach_o_free_cached_info (bfd *);
 637
 638 unsigned int bfd_mach_o_section_get_nbr_indirect (bfd *, bfd_mach_o_section *);
 639 unsigned int bfd_mach_o_section_get_entry_size (bfd *, bfd_mach_o_section *);
 640 bfd_boolean bfd_mach_o_read_symtab_symbols (bfd *);
 641 bfd_boolean bfd_mach_o_read_symtab_strtab (bfd *abfd);
 642
 643 /* A placeholder in case we need to suppress emitting the dysymtab for some
 644    reason (e.g. compatibility with older system versions).  */
 645 #define bfd_mach_o_should_emit_dysymtab(x) TRUE
 646
 647 extern const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[];
 648 extern const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[];
 649
 650 extern const bfd_target mach_o_fat_vec;
 651
 652 /* Interfaces between BFD names and Mach-O names.  */
 653
 654 typedef struct mach_o_section_name_xlat
 655 {
 656   const char *bfd_name;
 657   const char *mach_o_name;
 658   flagword bfd_flags;
 659   unsigned int macho_sectype;
 660   unsigned int macho_secattr;
 661   unsigned int sectalign;
 662 } mach_o_section_name_xlat;
 663
 664 typedef struct mach_o_segment_name_xlat
 665 {
 666   const char *segname;
 667   const mach_o_section_name_xlat *sections;
 668 } mach_o_segment_name_xlat;
 669
 670 const mach_o_section_name_xlat *
 671 bfd_mach_o_section_data_for_mach_sect (bfd *, const char *, const char *);
 672 const mach_o_section_name_xlat *
 673 bfd_mach_o_section_data_for_bfd_name (bfd *, const char *, const char **);
 674
 675 typedef struct bfd_mach_o_backend_data
 676 {
 677   enum bfd_architecture arch;
 678   bfd_boolean (*_bfd_mach_o_swap_reloc_in)(arelent *, bfd_mach_o_reloc_info *);
 679   bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
 680   bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
 681                                           void *, char *);
 682   const mach_o_segment_name_xlat *segsec_names_xlat;
 683   bfd_boolean (*bfd_mach_o_section_type_valid_for_target) (unsigned long);
 684 }
 685 bfd_mach_o_backend_data;
 686
 687 /* Values used in symbol.udata.i, to signal that the mach-o-specific data in the
 688    symbol are not yet set, or need validation (where this is possible).  */
 689
 690 #define SYM_MACHO_FIELDS_UNSET ((bfd_vma) -1)
 691 #define SYM_MACHO_FIELDS_NOT_VALIDATED ((bfd_vma) -2)
 692
 693 #endif /* _BFD_MACH_O_H_ */