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