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  1. /* Mach-O support for BFD.
  2.    Copyright 2011, 2012
  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 _MACH_O_LOADER_H
  23. #define _MACH_O_LOADER_H
  24.  
  25. /* Constants for header. */
  26.  
  27. typedef enum bfd_mach_o_mach_header_magic
  28. {
  29.   BFD_MACH_O_MH_MAGIC    = 0xfeedface,
  30.   BFD_MACH_O_MH_CIGAM    = 0xcefaedfe,
  31.   BFD_MACH_O_MH_MAGIC_64 = 0xfeedfacf,
  32.   BFD_MACH_O_MH_CIGAM_64 = 0xcffaedfe
  33. }
  34. bfd_mach_o_mach_header_magic;
  35.  
  36. #define BFD_MACH_O_CPU_IS64BIT 0x1000000
  37.  
  38. typedef enum bfd_mach_o_cpu_type
  39. {
  40.   BFD_MACH_O_CPU_TYPE_VAX = 1,
  41.   BFD_MACH_O_CPU_TYPE_MC680x0 = 6,
  42.   BFD_MACH_O_CPU_TYPE_I386 = 7,
  43.   BFD_MACH_O_CPU_TYPE_MIPS = 8,
  44.   BFD_MACH_O_CPU_TYPE_MC98000 = 10,
  45.   BFD_MACH_O_CPU_TYPE_HPPA = 11,
  46.   BFD_MACH_O_CPU_TYPE_ARM = 12,
  47.   BFD_MACH_O_CPU_TYPE_MC88000 = 13,
  48.   BFD_MACH_O_CPU_TYPE_SPARC = 14,
  49.   BFD_MACH_O_CPU_TYPE_I860 = 15,
  50.   BFD_MACH_O_CPU_TYPE_ALPHA = 16,
  51.   BFD_MACH_O_CPU_TYPE_POWERPC = 18,
  52.   BFD_MACH_O_CPU_TYPE_POWERPC_64 = (BFD_MACH_O_CPU_TYPE_POWERPC | BFD_MACH_O_CPU_IS64BIT),
  53.   BFD_MACH_O_CPU_TYPE_X86_64 = (BFD_MACH_O_CPU_TYPE_I386 | BFD_MACH_O_CPU_IS64BIT)
  54. }
  55. bfd_mach_o_cpu_type;
  56.  
  57. typedef enum bfd_mach_o_cpu_subtype
  58. {
  59.   /* i386.  */
  60.   BFD_MACH_O_CPU_SUBTYPE_X86_ALL = 3,
  61.  
  62.   /* arm.  */
  63.   BFD_MACH_O_CPU_SUBTYPE_ARM_ALL = 0,
  64.   BFD_MACH_O_CPU_SUBTYPE_ARM_V4T = 5,
  65.   BFD_MACH_O_CPU_SUBTYPE_ARM_V6 = 6,
  66.   BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ = 7,
  67.   BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE = 8,
  68.   BFD_MACH_O_CPU_SUBTYPE_ARM_V7 = 9
  69. }
  70. bfd_mach_o_cpu_subtype;
  71.  
  72. typedef enum bfd_mach_o_filetype
  73. {
  74.   BFD_MACH_O_MH_OBJECT      = 0x01,
  75.   BFD_MACH_O_MH_EXECUTE     = 0x02,
  76.   BFD_MACH_O_MH_FVMLIB      = 0x03,
  77.   BFD_MACH_O_MH_CORE        = 0x04,
  78.   BFD_MACH_O_MH_PRELOAD     = 0x05,
  79.   BFD_MACH_O_MH_DYLIB       = 0x06,
  80.   BFD_MACH_O_MH_DYLINKER    = 0x07,
  81.   BFD_MACH_O_MH_BUNDLE      = 0x08,
  82.   BFD_MACH_O_MH_DYLIB_STUB  = 0x09,
  83.   BFD_MACH_O_MH_DSYM        = 0x0a,
  84.   BFD_MACH_O_MH_KEXT_BUNDLE = 0x0b
  85. }
  86. bfd_mach_o_filetype;
  87.  
  88. typedef enum bfd_mach_o_header_flags
  89. {
  90.   BFD_MACH_O_MH_NOUNDEFS                = 0x0000001,
  91.   BFD_MACH_O_MH_INCRLINK                = 0x0000002,
  92.   BFD_MACH_O_MH_DYLDLINK                = 0x0000004,
  93.   BFD_MACH_O_MH_BINDATLOAD              = 0x0000008,
  94.   BFD_MACH_O_MH_PREBOUND                = 0x0000010,
  95.   BFD_MACH_O_MH_SPLIT_SEGS              = 0x0000020,
  96.   BFD_MACH_O_MH_LAZY_INIT               = 0x0000040,
  97.   BFD_MACH_O_MH_TWOLEVEL                = 0x0000080,
  98.   BFD_MACH_O_MH_FORCE_FLAT              = 0x0000100,
  99.   BFD_MACH_O_MH_NOMULTIDEFS             = 0x0000200,
  100.   BFD_MACH_O_MH_NOFIXPREBINDING         = 0x0000400,
  101.   BFD_MACH_O_MH_PREBINDABLE             = 0x0000800,
  102.   BFD_MACH_O_MH_ALLMODSBOUND            = 0x0001000,
  103.   BFD_MACH_O_MH_SUBSECTIONS_VIA_SYMBOLS = 0x0002000,
  104.   BFD_MACH_O_MH_CANONICAL               = 0x0004000,
  105.   BFD_MACH_O_MH_WEAK_DEFINES            = 0x0008000,
  106.   BFD_MACH_O_MH_BINDS_TO_WEAK           = 0x0010000,
  107.   BFD_MACH_O_MH_ALLOW_STACK_EXECUTION   = 0x0020000,
  108.   BFD_MACH_O_MH_ROOT_SAFE               = 0x0040000,
  109.   BFD_MACH_O_MH_SETUID_SAFE             = 0x0080000,
  110.   BFD_MACH_O_MH_NO_REEXPORTED_DYLIBS    = 0x0100000,
  111.   BFD_MACH_O_MH_PIE                     = 0x0200000,
  112.   BFD_MACH_O_MH_DEAD_STRIPPABLE_DYLIB   = 0x0400000,
  113.   BFD_MACH_O_MH_HAS_TLV_DESCRIPTORS     = 0x0800000,
  114.   BFD_MACH_O_MH_NO_HEAP_EXECUTION       = 0x1000000
  115. }
  116. bfd_mach_o_header_flags;
  118. /* Load command constants.  */
  119. #define BFD_MACH_O_LC_REQ_DYLD 0x80000000
  120.  
  121. typedef enum bfd_mach_o_load_command_type
  122. {
  123.   BFD_MACH_O_LC_SEGMENT = 0x1,          /* File segment to be mapped.  */
  124.   BFD_MACH_O_LC_SYMTAB = 0x2,           /* Link-edit stab symbol table info (obsolete).  */
  125.   BFD_MACH_O_LC_SYMSEG = 0x3,           /* Link-edit gdb symbol table info.  */
  126.   BFD_MACH_O_LC_THREAD = 0x4,           /* Thread.  */
  127.   BFD_MACH_O_LC_UNIXTHREAD = 0x5,       /* UNIX thread (includes a stack).  */
  128.   BFD_MACH_O_LC_LOADFVMLIB = 0x6,       /* Load a fixed VM shared library.  */
  129.   BFD_MACH_O_LC_IDFVMLIB = 0x7,         /* Fixed VM shared library id.  */
  130.   BFD_MACH_O_LC_IDENT = 0x8,            /* Object identification information (obsolete).  */
  131.   BFD_MACH_O_LC_FVMFILE = 0x9,          /* Fixed VM file inclusion.  */
  132.   BFD_MACH_O_LC_PREPAGE = 0xa,          /* Prepage command (internal use).  */
  133.   BFD_MACH_O_LC_DYSYMTAB = 0xb,         /* Dynamic link-edit symbol table info.  */
  134.   BFD_MACH_O_LC_LOAD_DYLIB = 0xc,       /* Load a dynamically linked shared library.  */
  135.   BFD_MACH_O_LC_ID_DYLIB = 0xd,         /* Dynamically linked shared lib identification.  */
  136.   BFD_MACH_O_LC_LOAD_DYLINKER = 0xe,    /* Load a dynamic linker.  */
  137.   BFD_MACH_O_LC_ID_DYLINKER = 0xf,      /* Dynamic linker identification.  */
  138.   BFD_MACH_O_LC_PREBOUND_DYLIB = 0x10,  /* Modules prebound for a dynamically.  */
  139.   BFD_MACH_O_LC_ROUTINES = 0x11,        /* Image routines.  */
  140.   BFD_MACH_O_LC_SUB_FRAMEWORK = 0x12,   /* Sub framework.  */
  141.   BFD_MACH_O_LC_SUB_UMBRELLA = 0x13,    /* Sub umbrella.  */
  142.   BFD_MACH_O_LC_SUB_CLIENT = 0x14,      /* Sub client.  */
  143.   BFD_MACH_O_LC_SUB_LIBRARY = 0x15,     /* Sub library.  */
  144.   BFD_MACH_O_LC_TWOLEVEL_HINTS = 0x16,  /* Two-level namespace lookup hints.  */
  145.   BFD_MACH_O_LC_PREBIND_CKSUM = 0x17,   /* Prebind checksum.  */
  146.   /* Load a dynamically linked shared library that is allowed to be
  147.        missing (weak).  */
  148.   BFD_MACH_O_LC_LOAD_WEAK_DYLIB = 0x18,
  149.   BFD_MACH_O_LC_SEGMENT_64 = 0x19,      /* 64-bit segment of this file to be
  150.                                            mapped.  */
  151.   BFD_MACH_O_LC_ROUTINES_64 = 0x1a,     /* Address of the dyld init routine
  152.                                            in a dylib.  */
  153.   BFD_MACH_O_LC_UUID = 0x1b,            /* 128-bit UUID of the executable.  */
  154.   BFD_MACH_O_LC_RPATH = 0x1c,           /* Run path addiions.  */
  155.   BFD_MACH_O_LC_CODE_SIGNATURE = 0x1d,  /* Local of code signature.  */
  156.   BFD_MACH_O_LC_SEGMENT_SPLIT_INFO = 0x1e, /* Local of info to split seg.  */
  157.   BFD_MACH_O_LC_REEXPORT_DYLIB = 0x1f,  /* Load and re-export lib.  */
  158.   BFD_MACH_O_LC_LAZY_LOAD_DYLIB = 0x20, /* Delay load of lib until use.  */
  159.   BFD_MACH_O_LC_ENCRYPTION_INFO = 0x21, /* Encrypted segment info.  */
  160.   BFD_MACH_O_LC_DYLD_INFO = 0x22,       /* Compressed dyld information.  */
  161.   BFD_MACH_O_LC_LOAD_UPWARD_DYLIB = 0x23, /* Load upward dylib.  */
  162.   BFD_MACH_O_LC_VERSION_MIN_MACOSX = 0x24,   /* Minimal MacOSX version.  */
  163.   BFD_MACH_O_LC_VERSION_MIN_IPHONEOS = 0x25, /* Minimal IOS version.  */
  164.   BFD_MACH_O_LC_FUNCTION_STARTS = 0x26,  /* Compressed table of func start.  */
  165.   BFD_MACH_O_LC_DYLD_ENVIRONMENT = 0x27, /* Env variable string for dyld.  */
  166.   BFD_MACH_O_LC_MAIN = 0x28,             /* Entry point.  */
  167.   BFD_MACH_O_LC_DATA_IN_CODE = 0x29,     /* Table of non-instructions.  */
  168.   BFD_MACH_O_LC_SOURCE_VERSION = 0x2a,   /* Source version.  */
  169.   BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS = 0x2b /* DRs from dylibs.  */
  170. }
  171. bfd_mach_o_load_command_type;
  173. /* Section constants.  */
  174. /* Constants for the type of a section.  */
  175.  
  176. typedef enum bfd_mach_o_section_type
  177. {
  178.   /* Regular section.  */
  179.   BFD_MACH_O_S_REGULAR = 0x0,
  180.  
  181.   /* Zero fill on demand section.  */
  182.   BFD_MACH_O_S_ZEROFILL = 0x1,
  183.  
  184.   /* Section with only literal C strings.  */
  185.   BFD_MACH_O_S_CSTRING_LITERALS = 0x2,
  186.  
  187.   /* Section with only 4 byte literals.  */
  188.   BFD_MACH_O_S_4BYTE_LITERALS = 0x3,
  189.  
  190.   /* Section with only 8 byte literals.  */
  191.   BFD_MACH_O_S_8BYTE_LITERALS = 0x4,
  192.  
  193.   /* Section with only pointers to literals.  */
  194.   BFD_MACH_O_S_LITERAL_POINTERS = 0x5,
  195.  
  196.   /* For the two types of symbol pointers sections and the symbol stubs
  197.      section they have indirect symbol table entries.  For each of the
  198.      entries in the section the indirect symbol table entries, in
  199.      corresponding order in the indirect symbol table, start at the index
  200.      stored in the reserved1 field of the section structure.  Since the
  201.      indirect symbol table entries correspond to the entries in the
  202.      section the number of indirect symbol table entries is inferred from
  203.      the size of the section divided by the size of the entries in the
  204.      section.  For symbol pointers sections the size of the entries in
  205.      the section is 4 bytes and for symbol stubs sections the byte size
  206.      of the stubs is stored in the reserved2 field of the section
  207.      structure.  */
  208.  
  209.   /* Section with only non-lazy symbol pointers.  */
  210.   BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS = 0x6,
  211.  
  212.   /* Section with only lazy symbol pointers.  */
  213.   BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7,
  214.  
  215.   /* Section with only symbol stubs, byte size of stub in the reserved2
  216.      field.  */
  217.   BFD_MACH_O_S_SYMBOL_STUBS = 0x8,
  218.  
  219.   /* Section with only function pointers for initialization.  */
  220.   BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9,
  221.  
  222.   /* Section with only function pointers for termination.  */
  223.   BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS = 0xa,
  224.  
  225.   /* Section contains symbols that are coalesced by the linkers.  */
  226.   BFD_MACH_O_S_COALESCED = 0xb,
  227.  
  228.   /* Zero fill on demand section (possibly larger than 4 GB).  */
  229.   BFD_MACH_O_S_GB_ZEROFILL = 0xc,
  230.  
  231.   /* Section with only pairs of function pointers for interposing.  */
  232.   BFD_MACH_O_S_INTERPOSING = 0xd,
  233.  
  234.   /* Section with only 16 byte literals.  */
  235.   BFD_MACH_O_S_16BYTE_LITERALS = 0xe,
  236.  
  237.   /* Section contains DTrace Object Format.  */
  238.   BFD_MACH_O_S_DTRACE_DOF = 0xf,
  239.  
  240.   /* Section with only lazy symbol pointers to lazy loaded dylibs.  */
  241.   BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10
  242. }
  243. bfd_mach_o_section_type;
  244.  
  245. /* The flags field of a section structure is separated into two parts a section
  246.    type and section attributes.  The section types are mutually exclusive (it
  247.    can only have one type) but the section attributes are not (it may have more
  248.    than one attribute).  */
  249.  
  250. #define BFD_MACH_O_SECTION_TYPE_MASK        0x000000ff
  251.  
  252. /* Constants for the section attributes part of the flags field of a section
  253.    structure.  */
  254. #define BFD_MACH_O_SECTION_ATTRIBUTES_MASK  0xffffff00
  255. /* System setable attributes.  */
  256. #define BFD_MACH_O_SECTION_ATTRIBUTES_SYS   0x00ffff00
  257. /* User attributes.  */
  258. #define BFD_MACH_O_SECTION_ATTRIBUTES_USR   0xff000000
  259.  
  260. typedef enum bfd_mach_o_section_attribute
  261. {
  262.   /* Section has no specified attibutes.  */
  263.   BFD_MACH_O_S_ATTR_NONE              = 0,
  264.  
  265.   /* Section has local relocation entries.  */
  266.   BFD_MACH_O_S_ATTR_LOC_RELOC         = 0x00000100,
  267.  
  268.   /* Section has external relocation entries.  */
  269.   BFD_MACH_O_S_ATTR_EXT_RELOC         = 0x00000200,
  270.  
  271.   /* Section contains some machine instructions.  */
  272.   BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS = 0x00000400,
  273.  
  274.   /* A debug section.  */
  275.   BFD_MACH_O_S_ATTR_DEBUG             = 0x02000000,
  276.  
  277.   /* Used with i386 stubs.  */
  278.   BFD_MACH_O_S_SELF_MODIFYING_CODE    = 0x04000000,
  279.  
  280.   /* Blocks are live if they reference live blocks.  */
  281.   BFD_MACH_O_S_ATTR_LIVE_SUPPORT      = 0x08000000,
  282.  
  283.   /* No dead stripping.  */
  284.   BFD_MACH_O_S_ATTR_NO_DEAD_STRIP     = 0x10000000,
  285.  
  286.   /* Section symbols can be stripped in files with MH_DYLDLINK flag.  */
  287.   BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS = 0x20000000,
  288.  
  289.   /* Section contains coalesced symbols that are not to be in the TOC of an
  290.      archive.  */
  291.   BFD_MACH_O_S_ATTR_NO_TOC            = 0x40000000,
  292.  
  293.   /* Section contains only true machine instructions.  */
  294.   BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS = 0x80000000
  295. }
  296. bfd_mach_o_section_attribute;
  298. /* Symbol constants.  */
  299.  
  300. /* Symbol n_type values.  */
  301. #define BFD_MACH_O_N_STAB  0xe0 /* If any of these bits set, a symbolic debugging entry.  */
  302. #define BFD_MACH_O_N_PEXT  0x10 /* Private external symbol bit.  */
  303. #define BFD_MACH_O_N_TYPE  0x0e /* Mask for the type bits.  */
  304. #define BFD_MACH_O_N_EXT   0x01 /* External symbol bit, set for external symbols.  */
  305. #define BFD_MACH_O_N_UNDF  0x00 /* Undefined, n_sect == NO_SECT.  */
  306. #define BFD_MACH_O_N_ABS   0x02 /* Absolute, n_sect == NO_SECT.  */
  307. #define BFD_MACH_O_N_INDR  0x0a /* Indirect.  */
  308. #define BFD_MACH_O_N_PBUD  0x0c /* Prebound undefined (defined in a dylib).  */
  309. #define BFD_MACH_O_N_SECT  0x0e /* Defined in section number n_sect.  */
  310.  
  311. #define BFD_MACH_O_NO_SECT 0    /* Symbol not in any section of the image.  */
  312.  
  313. /* Symbol n_desc reference flags.  */
  314. #define BFD_MACH_O_REFERENCE_MASK                               0x07
  315. #define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_NON_LAZY            0x00
  316. #define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_LAZY                0x01
  317. #define BFD_MACH_O_REFERENCE_FLAG_DEFINED                       0x02
  318. #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_DEFINED               0x03
  319. #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY    0x04
  320. #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY        0x05
  321.  
  322. #define BFD_MACH_O_REFERENCED_DYNAMICALLY                       0x10
  323. #define BFD_MACH_O_N_DESC_DISCARDED                             0x20
  324. #define BFD_MACH_O_N_NO_DEAD_STRIP                              0x20
  325. #define BFD_MACH_O_N_WEAK_REF                                   0x40
  326. #define BFD_MACH_O_N_WEAK_DEF                                   0x80
  327. #define BFD_MACH_O_N_REF_TO_WEAK                                0x80
  328.  
  329. #define BFD_MACH_O_N_ARM_THUMB_DEF                              0x08
  330. #define BFD_MACH_O_N_SYMBOL_RESOLVER                            0x100
  331.  
  332. #define BFD_MACH_O_INDIRECT_SYM_LOCAL                   0x80000000
  333. #define BFD_MACH_O_INDIRECT_SYM_ABS                     0x40000000
  335. /* Constants for DATA_IN_CODE entries.  */
  336. typedef enum bfd_mach_o_data_in_code_entry_kind
  337. {
  338.   BFD_MACH_O_DICE_KIND_DATA         = 0x0001, /* Data */
  339.   BFD_MACH_O_DICE_JUMP_TABLES8      = 0x0002, /* 1 byte jump tables.  */
  340.   BFD_MACH_O_DICE_JUMP_TABLES16     = 0x0003, /* 2 bytes.  */
  341.   BFD_MACH_O_DICE_JUMP_TABLES32     = 0x0004, /* 4 bytes.  */
  342.   BFD_MACH_O_DICE_ABS_JUMP_TABLES32 = 0x0005  /* Absolute jump table.  */
  343. } bfd_mach_o_data_in_code_entry_kind;
  344.  
  345. /* Thread constants.  */
  346.  
  347. typedef enum bfd_mach_o_ppc_thread_flavour
  348. {
  349.   BFD_MACH_O_PPC_THREAD_STATE      = 1,
  350.   BFD_MACH_O_PPC_FLOAT_STATE       = 2,
  351.   BFD_MACH_O_PPC_EXCEPTION_STATE   = 3,
  352.   BFD_MACH_O_PPC_VECTOR_STATE      = 4,
  353.   BFD_MACH_O_PPC_THREAD_STATE64    = 5,
  354.   BFD_MACH_O_PPC_EXCEPTION_STATE64 = 6,
  355.   BFD_MACH_O_PPC_THREAD_STATE_NONE = 7
  356. }
  357. bfd_mach_o_ppc_thread_flavour;
  358.  
  359. /* Defined in <mach/i386/thread_status.h> */
  360. typedef enum bfd_mach_o_i386_thread_flavour
  361. {
  362.   BFD_MACH_O_x86_THREAD_STATE32    = 1,
  363.   BFD_MACH_O_x86_FLOAT_STATE32     = 2,
  364.   BFD_MACH_O_x86_EXCEPTION_STATE32 = 3,
  365.   BFD_MACH_O_x86_THREAD_STATE64    = 4,
  366.   BFD_MACH_O_x86_FLOAT_STATE64     = 5,
  367.   BFD_MACH_O_x86_EXCEPTION_STATE64 = 6,
  368.   BFD_MACH_O_x86_THREAD_STATE      = 7,
  369.   BFD_MACH_O_x86_FLOAT_STATE       = 8,
  370.   BFD_MACH_O_x86_EXCEPTION_STATE   = 9,
  371.   BFD_MACH_O_x86_DEBUG_STATE32     = 10,
  372.   BFD_MACH_O_x86_DEBUG_STATE64     = 11,
  373.   BFD_MACH_O_x86_DEBUG_STATE       = 12,
  374.   BFD_MACH_O_x86_THREAD_STATE_NONE = 13
  375. }
  376. bfd_mach_o_i386_thread_flavour;
  377.  
  378. #endif /* _MACH_O_LOADER_H */
  379.