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