bfd/mach-o.h

   1 /* Mach-O support for BFD.
   2    Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008, 2009
   3    Free Software Foundation, Inc.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #ifndef _BFD_MACH_O_H_
  23 #define _BFD_MACH_O_H_
  24
  25 #include "bfd.h"
  26
  27 /* Symbol n_type values.  */
  28 #define BFD_MACH_O_N_STAB  0xe0 /* If any of these bits set, a symbolic debugging entry.  */
  29 #define BFD_MACH_O_N_PEXT  0x10 /* Private external symbol bit.  */
  30 #define BFD_MACH_O_N_TYPE  0x0e /* Mask for the type bits.  */
  31 #define BFD_MACH_O_N_EXT   0x01 /* External symbol bit, set for external symbols.  */
  32 #define BFD_MACH_O_N_UNDF  0x00 /* Undefined, n_sect == NO_SECT.  */
  33 #define BFD_MACH_O_N_ABS   0x02 /* Absolute, n_sect == NO_SECT.  */
  34 #define BFD_MACH_O_N_INDR  0x0a /* Indirect.  */
  35 #define BFD_MACH_O_N_PBUD  0x0c /* Prebound undefined (defined in a dylib).  */
  36 #define BFD_MACH_O_N_SECT  0x0e /* Defined in section number n_sect.  */
  37
  38 #define BFD_MACH_O_NO_SECT 0    /* Symbol not in any section of the image.  */
  39
  40 /* Symbol n_desc reference flags.  */
  41 #define BFD_MACH_O_REFERENCE_MASK                               0x0f
  42 #define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_NON_LAZY            0x00
  43 #define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_LAZY                0x01
  44 #define BFD_MACH_O_REFERENCE_FLAG_DEFINED                       0x02
  45 #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_DEFINED               0x03
  46 #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY    0x04
  47 #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY        0x05
  48
  49 #define BFD_MACH_O_REFERENCED_DYNAMICALLY                       0x10
  50 #define BFD_MACH_O_N_DESC_DISCARDED                             0x20
  51 #define BFD_MACH_O_N_NO_DEAD_STRIP                              0x20
  52 #define BFD_MACH_O_N_WEAK_REF                                   0x40
  53 #define BFD_MACH_O_N_WEAK_DEF                                   0x80
  54
  55 typedef enum bfd_mach_o_mach_header_magic
  56 {
  57   BFD_MACH_O_MH_MAGIC    = 0xfeedface,
  58   BFD_MACH_O_MH_CIGAM    = 0xcefaedfe,
  59   BFD_MACH_O_MH_MAGIC_64 = 0xfeedfacf,
  60   BFD_MACH_O_MH_CIGAM_64 = 0xcffaedfe
  61 }
  62 bfd_mach_o_mach_header_magic;
  63
  64 typedef enum bfd_mach_o_ppc_thread_flavour
  65 {
  66   BFD_MACH_O_PPC_THREAD_STATE      = 1,
  67   BFD_MACH_O_PPC_FLOAT_STATE       = 2,
  68   BFD_MACH_O_PPC_EXCEPTION_STATE   = 3,
  69   BFD_MACH_O_PPC_VECTOR_STATE      = 4,
  70   BFD_MACH_O_PPC_THREAD_STATE64    = 5,
  71   BFD_MACH_O_PPC_EXCEPTION_STATE64 = 6,
  72   BFD_MACH_O_PPC_THREAD_STATE_NONE = 7
  73 }
  74 bfd_mach_o_ppc_thread_flavour;
  75
  76 /* Defined in <mach/i386/thread_status.h> */
  77 typedef enum bfd_mach_o_i386_thread_flavour
  78 {
  79   BFD_MACH_O_x86_THREAD_STATE32    = 1,
  80   BFD_MACH_O_x86_FLOAT_STATE32     = 2,
  81   BFD_MACH_O_x86_EXCEPTION_STATE32 = 3,
  82   BFD_MACH_O_x86_THREAD_STATE64    = 4,
  83   BFD_MACH_O_x86_FLOAT_STATE64     = 5,
  84   BFD_MACH_O_x86_EXCEPTION_STATE64 = 6,
  85   BFD_MACH_O_x86_THREAD_STATE      = 7,
  86   BFD_MACH_O_x86_FLOAT_STATE       = 8,
  87   BFD_MACH_O_x86_EXCEPTION_STATE   = 9,
  88   BFD_MACH_O_x86_DEBUG_STATE32     = 10,
  89   BFD_MACH_O_x86_DEBUG_STATE64     = 11,
  90   BFD_MACH_O_x86_DEBUG_STATE       = 12,
  91   BFD_MACH_O_x86_THREAD_STATE_NONE = 13
  92 }
  93 bfd_mach_o_i386_thread_flavour;
  94
  95 #define BFD_MACH_O_LC_REQ_DYLD 0x80000000
  96
  97 typedef enum bfd_mach_o_load_command_type
  98 {
  99   BFD_MACH_O_LC_SEGMENT = 0x1,          /* File segment to be mapped.  */
 100   BFD_MACH_O_LC_SYMTAB = 0x2,           /* Link-edit stab symbol table info (obsolete).  */
 101   BFD_MACH_O_LC_SYMSEG = 0x3,           /* Link-edit gdb symbol table info.  */
 102   BFD_MACH_O_LC_THREAD = 0x4,           /* Thread.  */
 103   BFD_MACH_O_LC_UNIXTHREAD = 0x5,       /* UNIX thread (includes a stack).  */
 104   BFD_MACH_O_LC_LOADFVMLIB = 0x6,       /* Load a fixed VM shared library.  */
 105   BFD_MACH_O_LC_IDFVMLIB = 0x7,         /* Fixed VM shared library id.  */
 106   BFD_MACH_O_LC_IDENT = 0x8,            /* Object identification information (obsolete).  */
 107   BFD_MACH_O_LC_FVMFILE = 0x9,          /* Fixed VM file inclusion.  */
 108   BFD_MACH_O_LC_PREPAGE = 0xa,          /* Prepage command (internal use).  */
 109   BFD_MACH_O_LC_DYSYMTAB = 0xb,         /* Dynamic link-edit symbol table info.  */
 110   BFD_MACH_O_LC_LOAD_DYLIB = 0xc,       /* Load a dynamically linked shared library.  */
 111   BFD_MACH_O_LC_ID_DYLIB = 0xd,         /* Dynamically linked shared lib identification.  */
 112   BFD_MACH_O_LC_LOAD_DYLINKER = 0xe,    /* Load a dynamic linker.  */
 113   BFD_MACH_O_LC_ID_DYLINKER = 0xf,      /* Dynamic linker identification.  */
 114   BFD_MACH_O_LC_PREBOUND_DYLIB = 0x10,  /* Modules prebound for a dynamically.  */
 115   BFD_MACH_O_LC_ROUTINES = 0x11,        /* Image routines.  */
 116   BFD_MACH_O_LC_SUB_FRAMEWORK = 0x12,   /* Sub framework.  */
 117   BFD_MACH_O_LC_SUB_UMBRELLA = 0x13,    /* Sub umbrella.  */
 118   BFD_MACH_O_LC_SUB_CLIENT = 0x14,      /* Sub client.  */
 119   BFD_MACH_O_LC_SUB_LIBRARY = 0x15,     /* Sub library.  */
 120   BFD_MACH_O_LC_TWOLEVEL_HINTS = 0x16,  /* Two-level namespace lookup hints.  */
 121   BFD_MACH_O_LC_PREBIND_CKSUM = 0x17,   /* Prebind checksum.  */
 122   /* Load a dynamically linked shared library that is allowed to be
 123        missing (weak).  */
 124   BFD_MACH_O_LC_LOAD_WEAK_DYLIB = 0x18,
 125   BFD_MACH_O_LC_SEGMENT_64 = 0x19,      /* 64-bit segment of this file to be
 126                                            mapped.  */
 127   BFD_MACH_O_LC_ROUTINES_64 = 0x1a,     /* Address of the dyld init routine
 128                                            in a dylib.  */
 129   BFD_MACH_O_LC_UUID = 0x1b,            /* 128-bit UUID of the executable.  */
 130   BFD_MACH_O_LC_RPATH = 0x1c,           /* Run path addiions.  */
 131   BFD_MACH_O_LC_CODE_SIGNATURE = 0x1d,  /* Local of code signature.  */
 132   BFD_MACH_O_LC_SEGMENT_SPLIT_INFO = 0x1e, /* Local of info to split seg.  */
 133   BFD_MACH_O_LC_REEXPORT_DYLIB = 0x1f,  /* Load and re-export lib.  */
 134   BFD_MACH_O_LC_LAZY_LOAD_DYLIB = 0x20, /* Delay load of lib until use.  */
 135   BFD_MACH_O_LC_ENCRYPTION_INFO = 0x21, /* Encrypted segment info.  */
 136   BFD_MACH_O_LC_DYLD_INFO = 0x22        /* Compressed dyld information.  */
 137 }
 138 bfd_mach_o_load_command_type;
 139
 140 #define BFD_MACH_O_CPU_IS64BIT 0x1000000
 141
 142 typedef enum bfd_mach_o_cpu_type
 143 {
 144   BFD_MACH_O_CPU_TYPE_VAX = 1,
 145   BFD_MACH_O_CPU_TYPE_MC680x0 = 6,
 146   BFD_MACH_O_CPU_TYPE_I386 = 7,
 147   BFD_MACH_O_CPU_TYPE_MIPS = 8,
 148   BFD_MACH_O_CPU_TYPE_MC98000 = 10,
 149   BFD_MACH_O_CPU_TYPE_HPPA = 11,
 150   BFD_MACH_O_CPU_TYPE_ARM = 12,
 151   BFD_MACH_O_CPU_TYPE_MC88000 = 13,
 152   BFD_MACH_O_CPU_TYPE_SPARC = 14,
 153   BFD_MACH_O_CPU_TYPE_I860 = 15,
 154   BFD_MACH_O_CPU_TYPE_ALPHA = 16,
 155   BFD_MACH_O_CPU_TYPE_POWERPC = 18,
 156   BFD_MACH_O_CPU_TYPE_POWERPC_64 = (BFD_MACH_O_CPU_TYPE_POWERPC | BFD_MACH_O_CPU_IS64BIT),
 157   BFD_MACH_O_CPU_TYPE_X86_64 = (BFD_MACH_O_CPU_TYPE_I386 | BFD_MACH_O_CPU_IS64BIT)
 158 }
 159 bfd_mach_o_cpu_type;
 160
 161 typedef enum bfd_mach_o_cpu_subtype
 162 {
 163   BFD_MACH_O_CPU_SUBTYPE_X86_ALL = 3
 164 }
 165 bfd_mach_o_cpu_subtype;
 166
 167 typedef enum bfd_mach_o_filetype
 168 {
 169   BFD_MACH_O_MH_OBJECT      = 0x01,
 170   BFD_MACH_O_MH_EXECUTE     = 0x02,
 171   BFD_MACH_O_MH_FVMLIB      = 0x03,
 172   BFD_MACH_O_MH_CORE        = 0x04,
 173   BFD_MACH_O_MH_PRELOAD     = 0x05,
 174   BFD_MACH_O_MH_DYLIB       = 0x06,
 175   BFD_MACH_O_MH_DYLINKER    = 0x07,
 176   BFD_MACH_O_MH_BUNDLE      = 0x08,
 177   BFD_MACH_O_MH_DYLIB_STUB  = 0x09,
 178   BFD_MACH_O_MH_DSYM        = 0x0a,
 179   BFD_MACH_O_MH_KEXT_BUNDLE = 0x0b
 180 }
 181 bfd_mach_o_filetype;
 182
 183 typedef enum bfd_mach_o_header_flags
 184 {
 185   BFD_MACH_O_MH_NOUNDEFS                = 0x000001,
 186   BFD_MACH_O_MH_INCRLINK                = 0x000002,
 187   BFD_MACH_O_MH_DYLDLINK                = 0x000004,
 188   BFD_MACH_O_MH_BINDATLOAD              = 0x000008,
 189   BFD_MACH_O_MH_PREBOUND                = 0x000010,
 190   BFD_MACH_O_MH_SPLIT_SEGS              = 0x000020,
 191   BFD_MACH_O_MH_LAZY_INIT               = 0x000040,
 192   BFD_MACH_O_MH_TWOLEVEL                = 0x000080,
 193   BFD_MACH_O_MH_FORCE_FLAT              = 0x000100,
 194   BFD_MACH_O_MH_NOMULTIDEFS             = 0x000200,
 195   BFD_MACH_O_MH_NOFIXPREBINDING         = 0x000400,
 196   BFD_MACH_O_MH_PREBINDABLE             = 0x000800,
 197   BFD_MACH_O_MH_ALLMODSBOUND            = 0x001000,
 198   BFD_MACH_O_MH_SUBSECTIONS_VIA_SYMBOLS = 0x002000,
 199   BFD_MACH_O_MH_CANONICAL               = 0x004000,
 200   BFD_MACH_O_MH_WEAK_DEFINES            = 0x008000,
 201   BFD_MACH_O_MH_BINDS_TO_WEAK           = 0x010000,
 202   BFD_MACH_O_MH_ALLOW_STACK_EXECUTION   = 0x020000,
 203   BFD_MACH_O_MH_ROOT_SAFE               = 0x040000,
 204   BFD_MACH_O_MH_SETUID_SAFE             = 0x080000,
 205   BFD_MACH_O_MH_NO_REEXPORTED_DYLIBS    = 0x100000,
 206   BFD_MACH_O_MH_PIE                     = 0x200000
 207 }
 208 bfd_mach_o_header_flags;
 209
 210 /* Constants for the type of a section.  */
 211
 212 typedef enum bfd_mach_o_section_type
 213 {
 214   /* Regular section.  */
 215   BFD_MACH_O_S_REGULAR = 0x0,
 216
 217   /* Zero fill on demand section.  */
 218   BFD_MACH_O_S_ZEROFILL = 0x1,
 219
 220   /* Section with only literal C strings.  */
 221   BFD_MACH_O_S_CSTRING_LITERALS = 0x2,
 222
 223   /* Section with only 4 byte literals.  */
 224   BFD_MACH_O_S_4BYTE_LITERALS = 0x3,
 225
 226   /* Section with only 8 byte literals.  */
 227   BFD_MACH_O_S_8BYTE_LITERALS = 0x4,
 228
 229   /* Section with only pointers to literals.  */
 230   BFD_MACH_O_S_LITERAL_POINTERS = 0x5,
 231
 232   /* For the two types of symbol pointers sections and the symbol stubs
 233      section they have indirect symbol table entries.  For each of the
 234      entries in the section the indirect symbol table entries, in
 235      corresponding order in the indirect symbol table, start at the index
 236      stored in the reserved1 field of the section structure.  Since the
 237      indirect symbol table entries correspond to the entries in the
 238      section the number of indirect symbol table entries is inferred from
 239      the size of the section divided by the size of the entries in the
 240      section.  For symbol pointers sections the size of the entries in
 241      the section is 4 bytes and for symbol stubs sections the byte size
 242      of the stubs is stored in the reserved2 field of the section
 243      structure.  */
 244
 245   /* Section with only non-lazy symbol pointers.  */
 246   BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS = 0x6,
 247
 248   /* Section with only lazy symbol pointers.  */
 249   BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7,
 250
 251   /* Section with only symbol stubs, byte size of stub in the reserved2
 252      field.  */
 253   BFD_MACH_O_S_SYMBOL_STUBS = 0x8,
 254
 255   /* Section with only function pointers for initialization.  */
 256   BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9,
 257
 258   /* Section with only function pointers for termination.  */
 259   BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS = 0xa,
 260
 261   /* Section contains symbols that are coalesced by the linkers.  */
 262   BFD_MACH_O_S_COALESCED = 0xb,
 263
 264   /* Zero fill on demand section (possibly larger than 4 GB).  */
 265   BFD_MACH_O_S_GB_ZEROFILL = 0xc,
 266
 267   /* Section with only pairs of function pointers for interposing.  */
 268   BFD_MACH_O_S_INTERPOSING = 0xd,
 269
 270   /* Section with only 16 byte literals.  */
 271   BFD_MACH_O_S_16BYTE_LITERALS = 0xe,
 272
 273   /* Section contains DTrace Object Format.  */
 274   BFD_MACH_O_S_DTRACE_DOF = 0xf,
 275
 276   /* Section with only lazy symbol pointers to lazy loaded dylibs.  */
 277   BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10
 278 }
 279 bfd_mach_o_section_type;
 280
 281 /* The flags field of a section structure is separated into two parts a section
 282    type and section attributes.  The section types are mutually exclusive (it
 283    can only have one type) but the section attributes are not (it may have more
 284    than one attribute).  */
 285
 286 #define BFD_MACH_O_SECTION_TYPE_MASK        0x000000ff
 287
 288 /* Constants for the section attributes part of the flags field of a section
 289    structure.  */
 290 #define BFD_MACH_O_SECTION_ATTRIBUTES_MASK  0xffffff00
 291 /* System setable attributes.  */
 292 #define BFD_MACH_O_SECTION_ATTRIBUTES_SYS   0x00ffff00
 293 /* User attributes.  */
 294 #define BFD_MACH_O_SECTION_ATTRIBUTES_USR   0xff000000
 295
 296 typedef enum bfd_mach_o_section_attribute
 297 {
 298   /* Section has local relocation entries.  */
 299   BFD_MACH_O_S_ATTR_LOC_RELOC         = 0x00000100,
 300
 301   /* Section has external relocation entries.  */
 302   BFD_MACH_O_S_ATTR_EXT_RELOC         = 0x00000200,
 303
 304   /* Section contains some machine instructions.  */
 305   BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS = 0x00000400,
 306
 307   /* A debug section.  */
 308   BFD_MACH_O_S_ATTR_DEBUG             = 0x02000000,
 309
 310   /* Used with i386 stubs.  */
 311   BFD_MACH_O_S_SELF_MODIFYING_CODE    = 0x04000000,
 312
 313   /* Blocks are live if they reference live blocks.  */
 314   BFD_MACH_O_S_ATTR_LIVE_SUPPORT      = 0x08000000,
 315
 316   /* No dead stripping.  */
 317   BFD_MACH_O_S_ATTR_NO_DEAD_STRIP     = 0x10000000,
 318
 319   /* Section symbols can be stripped in files with MH_DYLDLINK flag.  */
 320   BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS = 0x20000000,
 321
 322   /* Section contains coalesced symbols that are not to be in the TOC of an
 323      archive.  */
 324   BFD_MACH_O_S_ATTR_NO_TOC            = 0x40000000,
 325
 326   /* Section contains only true machine instructions.  */
 327   BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS = 0x80000000
 328 }
 329 bfd_mach_o_section_attribute;
 330
 331 typedef struct bfd_mach_o_header
 332 {
 333   unsigned long magic;
 334   unsigned long cputype;
 335   unsigned long cpusubtype;
 336   unsigned long filetype;
 337   unsigned long ncmds;
 338   unsigned long sizeofcmds;
 339   unsigned long flags;
 340   unsigned int reserved;
 341   /* Version 1: 32 bits, version 2: 64 bits.  */
 342   unsigned int version;
 343   enum bfd_endian byteorder;
 344 }
 345 bfd_mach_o_header;
 346
 347 #define BFD_MACH_O_HEADER_SIZE 28
 348 #define BFD_MACH_O_HEADER_64_SIZE 32
 349
 350 typedef struct bfd_mach_o_section
 351 {
 352   asection *bfdsection;
 353   char sectname[16 + 1];
 354   char segname[16 + 1];
 355   bfd_vma addr;
 356   bfd_vma size;
 357   bfd_vma offset;
 358   unsigned long align;
 359   bfd_vma reloff;
 360   unsigned long nreloc;
 361   unsigned long flags;
 362   unsigned long reserved1;
 363   unsigned long reserved2;
 364   unsigned long reserved3;
 365 }
 366 bfd_mach_o_section;
 367 #define BFD_MACH_O_SECTION_SIZE 68
 368 #define BFD_MACH_O_SECTION_64_SIZE 80
 369
 370 typedef struct bfd_mach_o_segment_command
 371 {
 372   char segname[16 + 1];
 373   bfd_vma vmaddr;
 374   bfd_vma vmsize;
 375   bfd_vma fileoff;
 376   unsigned long filesize;
 377   unsigned long maxprot;        /* Maximum permitted protection.  */
 378   unsigned long initprot;       /* Initial protection.  */
 379   unsigned long nsects;
 380   unsigned long flags;
 381   bfd_mach_o_section *sections;
 382 }
 383 bfd_mach_o_segment_command;
 384 #define BFD_MACH_O_LC_SEGMENT_SIZE 56
 385 #define BFD_MACH_O_LC_SEGMENT_64_SIZE 72
 386
 387 /* Protection flags.  */
 388 #define BFD_MACH_O_PROT_READ    0x01
 389 #define BFD_MACH_O_PROT_WRITE   0x02
 390 #define BFD_MACH_O_PROT_EXECUTE 0x04
 391
 392 /* Generic relocation types (used by i386).  */
 393 #define BFD_MACH_O_GENERIC_RELOC_VANILLA        0
 394 #define BFD_MACH_O_GENERIC_RELOC_PAIR           1
 395 #define BFD_MACH_O_GENERIC_RELOC_SECTDIFF       2
 396 #define BFD_MACH_O_GENERIC_RELOC_PB_LA_PTR      3
 397 #define BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF 4
 398
 399 /* Size of a relocation entry.  */
 400 #define BFD_MACH_O_RELENT_SIZE 8
 401
 402 /* Fields for a normal (non-scattered) entry.  */
 403 #define BFD_MACH_O_R_PCREL              0x01000000
 404 #define BFD_MACH_O_GET_R_LENGTH(s)      (((s) >> 25) & 0x3)
 405 #define BFD_MACH_O_R_EXTERN             0x08000000
 406 #define BFD_MACH_O_GET_R_TYPE(s)        (((s) >> 28) & 0x0f)
 407 #define BFD_MACH_O_GET_R_SYMBOLNUM(s)   ((s) & 0x00ffffff)
 408 #define BFD_MACH_O_SET_R_LENGTH(l)      (((l) & 0x3) << 25)
 409 #define BFD_MACH_O_SET_R_TYPE(t)        (((t) & 0xf) << 28)
 410 #define BFD_MACH_O_SET_R_SYMBOLNUM(s)   ((s) & 0x00ffffff)
 411
 412 /* Fields for a scattered entry.  */
 413 #define BFD_MACH_O_SR_SCATTERED         0x80000000
 414 #define BFD_MACH_O_SR_PCREL             0x40000000
 415 #define BFD_MACH_O_GET_SR_LENGTH(s)     (((s) >> 28) & 0x3)
 416 #define BFD_MACH_O_GET_SR_TYPE(s)       (((s) >> 24) & 0x0f)
 417 #define BFD_MACH_O_GET_SR_ADDRESS(s)    ((s) & 0x00ffffff)
 418 #define BFD_MACH_O_SET_SR_LENGTH(l)     (((l) & 0x3) << 28)
 419 #define BFD_MACH_O_SET_SR_TYPE(t)       (((t) & 0xf) << 24)
 420 #define BFD_MACH_O_SET_SR_ADDRESS(s)    ((s) & 0x00ffffff)
 421
 422 /* Expanded internal representation of a relocation entry.  */
 423 typedef struct bfd_mach_o_reloc_info
 424 {
 425   bfd_vma r_address;
 426   bfd_vma r_value;
 427   unsigned int r_scattered : 1;
 428   unsigned int r_type : 4;
 429   unsigned int r_pcrel : 1;
 430   unsigned int r_length : 2;
 431   unsigned int r_extern : 1;
 432 }
 433 bfd_mach_o_reloc_info;
 434
 435 typedef struct bfd_mach_o_asymbol
 436 {
 437   /* The actual symbol which the rest of BFD works with.  */
 438   asymbol symbol;
 439
 440   /* Fields from Mach-O symbol.  */
 441   unsigned char n_type;
 442   unsigned char n_sect;
 443   unsigned short n_desc;
 444 }
 445 bfd_mach_o_asymbol;
 446 #define BFD_MACH_O_NLIST_SIZE 12
 447 #define BFD_MACH_O_NLIST_64_SIZE 16
 448
 449 typedef struct bfd_mach_o_symtab_command
 450 {
 451   unsigned int symoff;
 452   unsigned int nsyms;
 453   unsigned int stroff;
 454   unsigned int strsize;
 455   bfd_mach_o_asymbol *symbols;
 456   char *strtab;
 457 }
 458 bfd_mach_o_symtab_command;
 459
 460 /* This is the second set of the symbolic information which is used to support
 461    the data structures for the dynamically link editor.
 462
 463    The original set of symbolic information in the symtab_command which contains
 464    the symbol and string tables must also be present when this load command is
 465    present.  When this load command is present the symbol table is organized
 466    into three groups of symbols:
 467        local symbols (static and debugging symbols) - grouped by module
 468        defined external symbols - grouped by module (sorted by name if not lib)
 469        undefined external symbols (sorted by name)
 470    In this load command there are offsets and counts to each of the three groups
 471    of symbols.
 472
 473    This load command contains a the offsets and sizes of the following new
 474    symbolic information tables:
 475        table of contents
 476        module table
 477        reference symbol table
 478        indirect symbol table
 479    The first three tables above (the table of contents, module table and
 480    reference symbol table) are only present if the file is a dynamically linked
 481    shared library.  For executable and object modules, which are files
 482    containing only one module, the information that would be in these three
 483    tables is determined as follows:
 484        table of contents - the defined external symbols are sorted by name
 485        module table - the file contains only one module so everything in the
 486                       file is part of the module.
 487        reference symbol table - is the defined and undefined external symbols
 488
 489    For dynamically linked shared library files this load command also contains
 490    offsets and sizes to the pool of relocation entries for all sections
 491    separated into two groups:
 492        external relocation entries
 493        local relocation entries
 494    For executable and object modules the relocation entries continue to hang
 495    off the section structures.  */
 496
 497 typedef struct bfd_mach_o_dylib_module
 498 {
 499   /* Index into the string table indicating the name of the module.  */
 500   unsigned long module_name_idx;
 501   char *module_name;
 502
 503   /* Index into the symbol table of the first defined external symbol provided
 504      by the module.  */
 505   unsigned long iextdefsym;
 506
 507   /* Number of external symbols provided by this module.  */
 508   unsigned long nextdefsym;
 509
 510   /* Index into the external reference table of the first entry
 511      provided by this module.  */
 512   unsigned long irefsym;
 513
 514   /* Number of external reference entries provided by this module.  */
 515   unsigned long nrefsym;
 516
 517   /* Index into the symbol table of the first local symbol provided by this
 518      module.  */
 519   unsigned long ilocalsym;
 520
 521   /* Number of local symbols provided by this module.  */
 522   unsigned long nlocalsym;
 523
 524   /* Index into the external relocation table of the first entry provided
 525      by this module.  */
 526   unsigned long iextrel;
 527
 528   /* Number of external relocation entries provided by this module.  */
 529   unsigned long nextrel;
 530
 531   /* Index in the module initialization section to the pointers for this
 532      module.  */
 533   unsigned short iinit;
 534
 535   /* Index in the module termination section to the pointers for this
 536      module.  */
 537   unsigned short iterm;
 538
 539   /* Number of pointers in the module initialization for this module.  */
 540   unsigned short ninit;
 541
 542   /* Number of pointers in the module termination for this module.  */
 543   unsigned short nterm;
 544
 545   /* Number of data byte for this module that are used in the __module_info
 546      section of the __OBJC segment.  */
 547   unsigned long objc_module_info_size;
 548
 549   /* Statically linked address of the start of the data for this module
 550      in the __module_info section of the __OBJC_segment.  */
 551   bfd_vma objc_module_info_addr;
 552 }
 553 bfd_mach_o_dylib_module;
 554 #define BFD_MACH_O_DYLIB_MODULE_SIZE 52
 555 #define BFD_MACH_O_DYLIB_MODULE_64_SIZE 56
 556
 557 typedef struct bfd_mach_o_dylib_table_of_content
 558 {
 559   /* Index into the symbol table to the defined external symbol.  */
 560   unsigned long symbol_index;
 561
 562   /* Index into the module table to the module for this entry.  */
 563   unsigned long module_index;
 564 }
 565 bfd_mach_o_dylib_table_of_content;
 566 #define BFD_MACH_O_TABLE_OF_CONTENT_SIZE 8
 567
 568 typedef struct bfd_mach_o_dylib_reference
 569 {
 570   /* Index into the symbol table for the symbol being referenced.  */
 571   unsigned long isym;
 572
 573   /* Type of the reference being made (use REFERENCE_FLAGS constants).  */
 574   unsigned long flags;
 575 }
 576 bfd_mach_o_dylib_reference;
 577 #define BFD_MACH_O_REFERENCE_SIZE 4
 578
 579 typedef struct bfd_mach_o_dysymtab_command
 580 {
 581   /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
 582      are grouped into the following three groups:
 583        local symbols (further grouped by the module they are from)
 584        defined external symbols (further grouped by the module they are from)
 585        undefined symbols
 586
 587      The local symbols are used only for debugging.  The dynamic binding
 588      process may have to use them to indicate to the debugger the local
 589      symbols for a module that is being bound.
 590
 591      The last two groups are used by the dynamic binding process to do the
 592      binding (indirectly through the module table and the reference symbol
 593      table when this is a dynamically linked shared library file).  */
 594
 595   unsigned long ilocalsym;    /* Index to local symbols.  */
 596   unsigned long nlocalsym;    /* Number of local symbols.  */
 597   unsigned long iextdefsym;   /* Index to externally defined symbols.  */
 598   unsigned long nextdefsym;   /* Number of externally defined symbols.  */
 599   unsigned long iundefsym;    /* Index to undefined symbols.  */
 600   unsigned long nundefsym;    /* Number of undefined symbols.  */
 601
 602   /* For the for the dynamic binding process to find which module a symbol
 603      is defined in the table of contents is used (analogous to the ranlib
 604      structure in an archive) which maps defined external symbols to modules
 605      they are defined in.  This exists only in a dynamically linked shared
 606      library file.  For executable and object modules the defined external
 607      symbols are sorted by name and is use as the table of contents.  */
 608
 609   unsigned long tocoff;       /* File offset to table of contents.  */
 610   unsigned long ntoc;         /* Number of entries in table of contents.  */
 611
 612   /* To support dynamic binding of "modules" (whole object files) the symbol
 613      table must reflect the modules that the file was created from.  This is
 614      done by having a module table that has indexes and counts into the merged
 615      tables for each module.  The module structure that these two entries
 616      refer to is described below.  This exists only in a dynamically linked
 617      shared library file.  For executable and object modules the file only
 618      contains one module so everything in the file belongs to the module.  */
 619
 620   unsigned long modtaboff;    /* File offset to module table.  */
 621   unsigned long nmodtab;      /* Number of module table entries.  */
 622
 623   /* To support dynamic module binding the module structure for each module
 624      indicates the external references (defined and undefined) each module
 625      makes.  For each module there is an offset and a count into the
 626      reference symbol table for the symbols that the module references.
 627      This exists only in a dynamically linked shared library file.  For
 628      executable and object modules the defined external symbols and the
 629      undefined external symbols indicates the external references.  */
 630
 631   unsigned long extrefsymoff;  /* Offset to referenced symbol table.  */
 632   unsigned long nextrefsyms;   /* Number of referenced symbol table entries.  */
 633
 634   /* The sections that contain "symbol pointers" and "routine stubs" have
 635      indexes and (implied counts based on the size of the section and fixed
 636      size of the entry) into the "indirect symbol" table for each pointer
 637      and stub.  For every section of these two types the index into the
 638      indirect symbol table is stored in the section header in the field
 639      reserved1.  An indirect symbol table entry is simply a 32bit index into
 640      the symbol table to the symbol that the pointer or stub is referring to.
 641      The indirect symbol table is ordered to match the entries in the section.  */
 642
 643   unsigned long indirectsymoff; /* File offset to the indirect symbol table.  */
 644   unsigned long nindirectsyms;  /* Number of indirect symbol table entries.  */
 645
 646   /* To support relocating an individual module in a library file quickly the
 647      external relocation entries for each module in the library need to be
 648      accessed efficiently.  Since the relocation entries can't be accessed
 649      through the section headers for a library file they are separated into
 650      groups of local and external entries further grouped by module.  In this
 651      case the presents of this load command who's extreloff, nextrel,
 652      locreloff and nlocrel fields are non-zero indicates that the relocation
 653      entries of non-merged sections are not referenced through the section
 654      structures (and the reloff and nreloc fields in the section headers are
 655      set to zero).
 656
 657      Since the relocation entries are not accessed through the section headers
 658      this requires the r_address field to be something other than a section
 659      offset to identify the item to be relocated.  In this case r_address is
 660      set to the offset from the vmaddr of the first LC_SEGMENT command.
 661
 662      The relocation entries are grouped by module and the module table
 663      entries have indexes and counts into them for the group of external
 664      relocation entries for that the module.
 665
 666      For sections that are merged across modules there must not be any
 667      remaining external relocation entries for them (for merged sections
 668      remaining relocation entries must be local).  */
 669
 670   unsigned long extreloff;    /* Offset to external relocation entries.  */
 671   unsigned long nextrel;      /* Number of external relocation entries.  */
 672
 673   /* All the local relocation entries are grouped together (they are not
 674      grouped by their module since they are only used if the object is moved
 675      from it statically link edited address).  */
 676
 677   unsigned long locreloff;    /* Offset to local relocation entries.  */
 678   unsigned long nlocrel;      /* Number of local relocation entries.  */
 679
 680   bfd_mach_o_dylib_module *dylib_module;
 681   bfd_mach_o_dylib_table_of_content *dylib_toc;
 682   unsigned int *indirect_syms;
 683   bfd_mach_o_dylib_reference *ext_refs;
 684 }
 685 bfd_mach_o_dysymtab_command;
 686
 687 /* An indirect symbol table entry is simply a 32bit index into the symbol table
 688    to the symbol that the pointer or stub is refering to.  Unless it is for a
 689    non-lazy symbol pointer section for a defined symbol which strip(1) has
 690    removed.  In which case it has the value INDIRECT_SYMBOL_LOCAL.  If the
 691    symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that.  */
 692
 693 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
 694 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS   0x40000000
 695 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE  4
 696
 697 /* For LC_THREAD or LC_UNIXTHREAD.  */
 698
 699 typedef struct bfd_mach_o_thread_flavour
 700 {
 701   unsigned long flavour;
 702   unsigned long offset;
 703   unsigned long size;
 704 }
 705 bfd_mach_o_thread_flavour;
 706
 707 typedef struct bfd_mach_o_thread_command
 708 {
 709   unsigned long nflavours;
 710   bfd_mach_o_thread_flavour *flavours;
 711   asection *section;
 712 }
 713 bfd_mach_o_thread_command;
 714
 715 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER.  */
 716
 717 typedef struct bfd_mach_o_dylinker_command
 718 {
 719   unsigned long name_offset;         /* Offset to library's path name.  */
 720   unsigned long name_len;            /* Offset to library's path name.  */
 721   char *name_str;
 722 }
 723 bfd_mach_o_dylinker_command;
 724
 725 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
 726    or LC_REEXPORT_DYLIB.  */
 727
 728 typedef struct bfd_mach_o_dylib_command
 729 {
 730   unsigned long name_offset;           /* Offset to library's path name.  */
 731   unsigned long name_len;              /* Offset to library's path name.  */
 732   unsigned long timestamp;             /* Library's build time stamp.  */
 733   unsigned long current_version;       /* Library's current version number.  */
 734   unsigned long compatibility_version; /* Library's compatibility vers number.  */
 735   char *name_str;
 736 }
 737 bfd_mach_o_dylib_command;
 738
 739 /* For LC_PREBOUND_DYLIB.  */
 740
 741 typedef struct bfd_mach_o_prebound_dylib_command
 742 {
 743   unsigned long name;                /* Library's path name.  */
 744   unsigned long nmodules;            /* Number of modules in library.  */
 745   unsigned long linked_modules;      /* Bit vector of linked modules.  */
 746 }
 747 bfd_mach_o_prebound_dylib_command;
 748
 749 /* For LC_UUID.  */
 750
 751 typedef struct bfd_mach_o_uuid_command
 752 {
 753   unsigned char uuid[16];
 754   asection *section;
 755 }
 756 bfd_mach_o_uuid_command;
 757
 758 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO.  */
 759
 760 typedef struct bfd_mach_o_linkedit_command
 761 {
 762   unsigned long dataoff;
 763   unsigned long datasize;
 764 }
 765 bfd_mach_o_linkedit_command;
 766
 767 typedef struct bfd_mach_o_str_command
 768 {
 769   unsigned long stroff;
 770   unsigned long str_len;
 771   char *str;
 772 }
 773 bfd_mach_o_str_command;
 774
 775 typedef struct bfd_mach_o_dyld_info_command
 776 {
 777   /* File offset and size to rebase info.  */
 778   unsigned int rebase_off;
 779   unsigned int rebase_size;
 780
 781   /* File offset and size of binding info.  */
 782   unsigned int bind_off;
 783   unsigned int bind_size;
 784
 785   /* File offset and size of weak binding info.  */
 786   unsigned int weak_bind_off;
 787   unsigned int weak_bind_size;
 788
 789   /* File offset and size of lazy binding info.  */
 790   unsigned int lazy_bind_off;
 791   unsigned int lazy_bind_size;
 792
 793   /* File offset and size of export info.  */
 794   unsigned int export_off;
 795   unsigned int export_size;
 796 }
 797 bfd_mach_o_dyld_info_command;
 798
 799 typedef struct bfd_mach_o_load_command
 800 {
 801   bfd_mach_o_load_command_type type;
 802   bfd_boolean type_required;
 803   unsigned int offset;
 804   unsigned int len;
 805   union
 806   {
 807     bfd_mach_o_segment_command segment;
 808     bfd_mach_o_symtab_command symtab;
 809     bfd_mach_o_dysymtab_command dysymtab;
 810     bfd_mach_o_thread_command thread;
 811     bfd_mach_o_dylib_command dylib;
 812     bfd_mach_o_dylinker_command dylinker;
 813     bfd_mach_o_prebound_dylib_command prebound_dylib;
 814     bfd_mach_o_uuid_command uuid;
 815     bfd_mach_o_linkedit_command linkedit;
 816     bfd_mach_o_str_command str;
 817     bfd_mach_o_dyld_info_command dyld_info;
 818   }
 819   command;
 820 }
 821 bfd_mach_o_load_command;
 822
 823 typedef struct mach_o_data_struct
 824 {
 825   /* Mach-O header.  */
 826   bfd_mach_o_header header;
 827   /* Array of load commands (length is given by header.ncmds).  */
 828   bfd_mach_o_load_command *commands;
 829
 830   /* Flatten array of sections.  The array is 0-based.  */
 831   unsigned long nsects;
 832   bfd_mach_o_section **sections;
 833
 834   /* Used while writting: current length of the output file.  This is used
 835      to allocate space in the file.  */
 836   ufile_ptr filelen;
 837
 838   /* As symtab is referenced by other load command, it is handy to have
 839      a direct access to it.  Also it is not clearly stated, only one symtab
 840      is expected.  */
 841   bfd_mach_o_symtab_command *symtab;
 842   bfd_mach_o_dysymtab_command *dysymtab;
 843 }
 844 bfd_mach_o_data_struct;
 845
 846 /* Target specific routines.  */
 847 typedef struct bfd_mach_o_backend_data
 848 {
 849   bfd_boolean (*_bfd_mach_o_swap_reloc_in)(arelent *, bfd_mach_o_reloc_info *);
 850   bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
 851   bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
 852                                           void *, char *);
 853 }
 854 bfd_mach_o_backend_data;
 855
 856 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
 857 #define bfd_mach_o_get_backend_data(abfd) \
 858   ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
 859
 860 bfd_boolean bfd_mach_o_valid (bfd *);
 861 int bfd_mach_o_scan_read_dysymtab_symbol (bfd *, bfd_mach_o_dysymtab_command *, bfd_mach_o_symtab_command *, bfd_mach_o_asymbol *, unsigned long);
 862 int bfd_mach_o_scan_start_address (bfd *);
 863 int bfd_mach_o_scan (bfd *, bfd_mach_o_header *, bfd_mach_o_data_struct *);
 864 bfd_boolean bfd_mach_o_mkobject_init (bfd *);
 865 const bfd_target *bfd_mach_o_object_p (bfd *);
 866 const bfd_target *bfd_mach_o_core_p (bfd *);
 867 const bfd_target *bfd_mach_o_archive_p (bfd *);
 868 bfd *bfd_mach_o_openr_next_archived_file (bfd *, bfd *);
 869 int bfd_mach_o_lookup_section (bfd *, asection *, bfd_mach_o_load_command **, bfd_mach_o_section **);
 870 int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
 871 bfd_boolean bfd_mach_o_write_contents (bfd *);
 872 bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *,
 873                                                      bfd *, asymbol *);
 874 bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
 875                                                       bfd *, asection *);
 876 bfd_boolean bfd_mach_o_bfd_copy_private_bfd_data (bfd *, bfd *);
 877 long bfd_mach_o_get_symtab_upper_bound (bfd *);
 878 long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
 879 long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *);
 880 long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **);
 881 long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *);
 882 long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **);
 883 asymbol *bfd_mach_o_make_empty_symbol (bfd *);
 884 void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
 885 void bfd_mach_o_print_symbol (bfd *, PTR, asymbol *, bfd_print_symbol_type);
 886 bfd_boolean bfd_mach_o_bfd_print_private_bfd_data (bfd *, PTR);
 887 int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *);
 888 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type);
 889 int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *);
 890 char *bfd_mach_o_core_file_failing_command (bfd *);
 891 int bfd_mach_o_core_file_failing_signal (bfd *);
 892 bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *);
 893 bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *);
 894 const bfd_target *bfd_mach_o_header_p (bfd *, bfd_mach_o_filetype,
 895                                        bfd_mach_o_cpu_type);
 896 bfd_boolean bfd_mach_o_build_commands (bfd *);
 897 bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
 898                                              file_ptr, bfd_size_type);
 899 unsigned int bfd_mach_o_version (bfd *);
 900
 901 extern const bfd_target mach_o_fat_vec;
 902
 903 #endif /* _BFD_MACH_O_H_ */