Mac OS X ABI Mach-O File(Mach-O.rfi):
Class: Executable and Object, Status: Almost Complete, Last change: 13.09.2016 11:12:18

data
  0 ulong magic /* mach magic number identifier */

%$IF magic=0xfeedface;
const
  mode64=0;
  revbytes=0;
set byteorder norm
descr ('Mac OS X ABI 32-bit Mach-O File, byte order LSB.')
%$ELSIF magic=0xcefaedfe;
const
  mode64=0;
  revbytes=1;
set byteorder rev
descr ('Mac OS X ABI 32-bit Mach-O File, byte order MSB.')
%$ELSIF magic=0xfeedfacf;
const
  mode64=1;
  revbytes=0;
set byteorder norm
descr ('Mac OS X ABI 64-bit Mach-O File, byte order LSB.')
%$ELSIF magic=0xcffaedfe;
const
  mode64=1;
  revbytes=1;
set byteorder rev
descr ('Mac OS X ABI 64-bit Mach-O File, byte order MSB.')
%$ELSE
assert 0; //fail
%$END
descr (NL,
  'Info Src: Mac OS X ABI Mach-O File Format Reference.',NL,
  'Info Src: /usr/include/mach-o/loader.h',NL,
  'Info Src: machoview',NL)

type bit
bit1 num+(1)
bit2 num+(2)
bit3 num+(3)
bit4 num+(4)
bit8 num+(8)

type

int32_t num-(4)
uint32_t num+(4)
uint24_t num+(3)
int16_t num-(2)
uint16_t num+(2)
uint8_t num+(1)
uint64_t struc
 %$IF revbytes;
  uint32_t hi
  uint32_t lo
 %$ELSE
  uint32_t lo
  uint32_t hi
 %$END
ends:displ=(HEX(@.hi),HEX(@.lo,8))

%$IF mode64;
native_uint_t uint64_t
%$ELSE
native_uint_t uint32_t
%$END

//Start from mach/machine.h

cpu_type_machine_t enum uint24_t(
  ANY=0xFFFFFF,
  VAX=1,
  MC680x0=6,
  X86=7,
  MIPS=8, //skip
  MC98000=10,
  HPPA=11,
  ARM=12, //skip
  MC88000=13,
  SPARC=14,
  I860=15,
  ALPHA=16, //skip
  POWERPC=18
) 
cpu_type_capability_t set 8 of (ABI64)

cpu_type_t struc
 %$IF revbytes;
  cpu_type_capability_t caps
  cpu_type_machine_t machine
 %$ELSE
  cpu_type_machine_t machine
  cpu_type_capability_t caps
 %$END
ends

cpu_ANY_subtype_t enum uint32_t (
  MULTIPLE=0xFFFFFFFF,
  LITTLE_ENDIAN=0,
  BIG_ENDIAN=1
)

cpu_VAX_subtype_t enum uint32_t (
  VAX_ALL=0,
  VAX780=1,
  VAX785=2,
  VAX750=3,
  VAX730=4,
  UVAXI=5,
  UVAXII=6,
  VAX8200=7,
  VAX8500=8,
  VAX8600=9,
  VAX8650=10,
  VAX8800=11,
  UVAXIII=12
)

/*
 *         680x0 subtypes
 *
 * The subtype definitions here are unusual for historical reasons.
 * NeXT used to consider 68030 code as generic 68000 code.  For
 * backwards compatability:
 *
 *        CPU_SUBTYPE_MC68030 symbol has been preserved for source code
 *        compatability.
 *
 *        CPU_SUBTYPE_MC680x0_ALL has been defined to be the same
 *        subtype as CPU_SUBTYPE_MC68030 for binary comatability.
 *
 *        CPU_SUBTYPE_MC68030_ONLY has been added to allow new object
 *        files to be tagged as containing 68030-specific instructions.
 */

cpu_MC680x0_subtype_t enum uint32_t (
  MC68030=1, /* compat */
  MC68040=2,
  MC68030_ONLY=3
)

cpu_X86_subtype_t enum uint32_t (
  ALL=0,
  I386=0x03,
  I486=0x04,
  I486SX=0x84,
  PENT=0x05,
  PENTPRO=0x16,
  PENTII_M3=0x36,
  PENTII_M5=0x56,
  CELERON=0x67,
  CELERON_MOBILE=0x77,
  PENTIUM_3=0x08,
  PENTIUM_3_M=0x18,
  PENTIUM_3_XEON=0x28,
  PENTIUM_M=0x09,
  PENTIUM_4=0x0A,
  PENTIUM_4_M=0x1A,
  ITANIUM=0x0B,
  ITANIUM_2=0x1B,
  XEON=0x0C,
  XEON_MP=0x1C
)

cpu_MIPS_subtype_t enum uint32_t (
  MIPS_ALL=0,
  MIPS_R2300=1,
  MIPS_R2600=2,
  MIPS_R2800=3,
  MIPS_R2000a=4,        /* pmax */
  MIPS_R2000=5,
  MIPS_R3000a=6,        /* 3max */
  MIPS_R3000=7
)

cpu_MC98000_subtype_t enum uint32_t (
  ALL=0,
  MC98601=1
)

/*
 *        HPPA subtypes for Hewlett-Packard HP-PA family of
 *        risc processors. Port by NeXT to 700 series.
 */

cpu_HPPA_subtype_t enum uint32_t (
  HPPA_7100        =0, /* compat */
  HPPA_7100LC        =1
)

cpu_MC88000_subtype_t enum uint32_t (
  MC88000_ALL=0,
  MC88100=1,
  MC88110=2
)

cpu_SPARC_subtype_t enum uint32_t (
  ALL=0
)

/*
 *        I860 subtypes
 */
cpu_I860_subtype_t enum uint32_t (
  I860_ALL=0,
  I860_860=1
)

cpu_PowerPC_subtype_t enum uint32_t (
  POWERPC_ALL=0,
  POWERPC_601=1,
  POWERPC_602=2,
  POWERPC_603=3,
  POWERPC_603e=4,
  POWERPC_603ev=5,
  POWERPC_604=6,
  POWERPC_604e=7,
  POWERPC_620=8,
  POWERPC_750=9,
  POWERPC_7400=10,
  POWERPC_7450=11,
  POWERPC_970=100
 )

cpu_subtype_t(T) case @:T of
 cpu_type_machine_t.ANY: cpu_ANY_subtype_t
 cpu_type_machine_t.VAX: cpu_VAX_subtype_t
 cpu_type_machine_t.MC680x0: cpu_MC680x0_subtype_t
 cpu_type_machine_t.X86: cpu_X86_subtype_t
 cpu_type_machine_t.MIPS: cpu_MIPS_subtype_t
 cpu_type_machine_t.MC98000: cpu_MC98000_subtype_t
 cpu_type_machine_t.HPPA: cpu_HPPA_subtype_t
// cpu_type_machine_t.ARM: cpu_ARM_subtype_t
 cpu_type_machine_t.MC88000: cpu_MC88000_subtype_t
 cpu_type_machine_t.SPARC: cpu_SPARC_subtype_t
 cpu_type_machine_t.I860: cpu_I860_subtype_t
// cpu_type_machine_t.ALPHA: cpu_ALPHA_subtype_t
 cpu_type_machine_t.POWERPC: cpu_PowerPC_subtype_t
else uint32_t
endc

//End from mach/machine.h

uuid_t array[16]of uint8_t

/* Constants for the filetype field of the mach_header */
filetype_t enum uint32_t(
  MH_OBJECT = 0x1,  /* relocatable object file */
  MH_EXECUTE = 0x2, /* demand paged executable file */
  MH_FVMLIB = 0x3, /* fixed VM shared library file */
  MH_CORE = 0x4, /* core file */
  MH_PRELOAD = 0x5, /* preloaded executable file */
  MH_DYLIB = 0x6, /* dynamically bound shared library */
  MH_DYLINKER = 0x7, /* dynamic link editor */
  MH_BUNDLE = 0x8, /* dynamically bound bundle file */
  MH_DYLIB_STUB = 0x9, /* shared library stub for static */
                       /*  linking only, no section contents */
  MH_DSYM = 0xa, /* companion file with only debug sections */
  MH_KEXT_BUNDLE = 0xb /* x86_64 kexts */
)

/* Constants for the flags field of the mach_header */
fileflags_t set 32 of (
  MH_NOUNDEFS ^ 0x1, /* the object file has no undefined references */
  MH_INCRLINK ^ 0x2, /* the object file is the output of an
                      incremental link against a base file
                      and can't be link edited again */
  MH_DYLDLINK ^ 0x4, /* the object file is input for the
                      dynamic linker and can't be staticly
                      link edited again */
  MH_BINDATLOAD ^ 0x8, /* the object file's undefined
                         references are bound by the dynamic
                         linker when loaded. */
  MH_PREBOUND ^ 0x10, /* the file has its dynamic undefined
                         references prebound. */
  MH_SPLIT_SEGS ^ 0x20, /* the file has its read-only and
                         read-write segments split */
  MH_LAZY_INIT ^ 0x40, /* the shared library init routine is
                         to be run lazily via catching memory
                         faults to its writeable segments
                        (obsolete) */
  MH_TWOLEVEL ^ 0x80, /* the image is using two-level name space bindings */
  MH_FORCE_FLAT ^ 0x100, /* the executable is forcing all images
                          to use flat name space bindings */
  MH_NOMULTIDEFS ^ 0x200, /* this umbrella guarantees no multiple
                           defintions of symbols in its
                           sub-images so the two-level namespace
                           hints can always be used. */
  MH_NOFIXPREBINDING ^ 0x400, /* do not have dyld notify the
                             prebinding agent about this executable */
  MH_PREBINDABLE ^ 0x800, /* the binary is not prebound but can
                            have its prebinding redone. only used
                            when MH_PREBOUND is not set. */
  MH_ALLMODSBOUND ^ 0x1000, /* indicates that this binary binds to
                            all two-level namespace modules of
                            its dependent libraries. only used
                            when MH_PREBINDABLE and MH_TWOLEVEL
                            are both set. */
  MH_SUBSECTIONS_VIA_SYMBOLS ^ 0x2000, /* safe to divide up the sections into
                                         sub-sections via symbols for dead
                                         code stripping */
  MH_CANONICAL ^ 0x4000, /* the binary has been canonicalized
                           via the unprebind operation */
  MH_WEAK_DEFINES ^ 0x8000, /* the final linked image contains
                             external weak symbols */
  MH_BINDS_TO_WEAK ^ 0x10000, /* the final linked image uses weak symbols */
  MH_ALLOW_STACK_EXECUTION ^ 0x20000, /* When this bit is set, all stacks
                               in the task will be given stack
                               execution privilege.  Only used in
                               MH_EXECUTE filetypes. */
  MH_ROOT_SAFE ^ 0x40000, /* When this bit is set, the binary
                           declares it is safe for use in
                           processes with uid zero */
  MH_SETUID_SAFE ^ 0x80000, /* When this bit is set, the binary
                            declares it is safe for use in
                            processes when issetugid() is true */

  MH_NO_REEXPORTED_DYLIBS ^ 0x100000, /* When this bit is set on a dylib,
                                      the static linker does not need to
                                      examine dependent dylibs to see
                                      if any are re-exported */
  MH_PIE ^ 0x200000, /* When this bit is set, the OS will
                     load the main executable at a
                     random address. Only used in MH_EXECUTE filetypes. */
  MH_DEAD_STRIPPABLE_DYLIB ^ 0x400000, /* Only for use on dylibs.  When
                          linking against a dylib that has this bit set, the static linker
                          will automatically not create a LC_LOAD_DYLIB load command to the
                          dylib if no symbols are being referenced from the dylib. */
  MH_HAS_TLV_DESCRIPTORS ^ 0x800000, /* Contains a section of type
                          S_THREAD_LOCAL_VARIABLES */

  MH_NO_HEAP_EXECUTION ^ 0x1000000 /* When this bit is set, the OS will
                                 run the main executable with
                                 a non-executable heap even on
                                 platforms (e.g. i386) that don't
                                 require it. Only used in MH_EXECUTE filetypes. */
)


const
  LC_REQ_DYLD = 0x80000000;

type
/* Constants for the cmd field of all load commands, the type */
load_cmd_t enum uint32_t (
  LC_SEGMENT = 0x1, /* segment of this file to be mapped */
  LC_SYMTAB = 0x2, /* link-edit stab symbol table info */
  LC_SYMSEG = 0x3, /* link-edit gdb symbol table info (obsolete) */
  LC_THREAD = 0x4, /* thread */
  LC_UNIXTHREAD = 0x5, /* unix thread (includes a stack) */
  LC_LOADFVMLIB = 0x6, /* load a specified fixed VM shared library */
  LC_IDFVMLIB = 0x7, /* fixed VM shared library identification */
  LC_IDENT = 0x8, /* object identification info (obsolete) */
  LC_FVMFILE = 0x9, /* fixed VM file inclusion (internal use) */
  LC_PREPAGE = 0xa, /* prepage command (internal use) */
  LC_DYSYMTAB = 0xb, /* dynamic link-edit symbol table info */
  LC_LOAD_DYLIB = 0xc, /* load a dynamically linked shared library */
  LC_ID_DYLIB = 0xd, /* dynamically linked shared lib ident */
  LC_LOAD_DYLINKER = 0xe, /* load a dynamic linker */
  LC_ID_DYLINKER = 0xf, /* dynamic linker identification */
  LC_PREBOUND_DYLIB = 0x10, /* modules prebound for a dynamically */
  /*  linked shared library */
  LC_ROUTINES = 0x11, /* image routines */
  LC_SUB_FRAMEWORK = 0x12, /* sub framework */
  LC_SUB_UMBRELLA = 0x13, /* sub umbrella */
  LC_SUB_CLIENT = 0x14, /* sub client */
  LC_SUB_LIBRARY = 0x15, /* sub library */
  LC_TWOLEVEL_HINTS = 0x16, /* two-level namespace lookup hints */
  LC_PREBIND_CKSUM = 0x17, /* prebind checksum */

/*
 * load a dynamically linked shared library that is allowed to be missing
 * (all symbols are weak imported).
 */
  LC_LOAD_WEAK_DYLIB = (0x18 or LC_REQ_DYLD),

  LC_SEGMENT_64 = 0x19, /* 64-bit segment of this file to be
                                   mapped */
  LC_ROUTINES_64 = 0x1a, /* 64-bit image routines */
  LC_UUID = 0x1b, /* the uuid */
  LC_RPATH = (0x1c or LC_REQ_DYLD), /* runpath additions */
  LC_CODE_SIGNATURE = 0x1d, /* local of code signature */
  LC_SEGMENT_SPLIT_INFO = 0x1e, /* local of info to split segments */
  LC_REEXPORT_DYLIB = (0x1f or LC_REQ_DYLD), /* load and re-export dylib */
  LC_LAZY_LOAD_DYLIB = 0x20, /* delay load of dylib until first use */
  LC_ENCRYPTION_INFO = 0x21, /* encrypted segment information */
  LC_DYLD_INFO = 0x22, /* compressed dyld information */
  LC_DYLD_INFO_ONLY = (0x22 or LC_REQ_DYLD), /* compressed dyld information only */
  LC_LOAD_UPWARD_DYLIB = (0x23 or LC_REQ_DYLD), /* load upward dylib */
  LC_VERSION_MIN_MACOSX = 0x24, /* build for MacOSX min OS version */
  LC_VERSION_MIN_IPHONEOS = 0x25, /* build for iPhoneOS min OS version */
  LC_FUNCTION_STARTS = 0x26 /* compressed table of function start addresses */
)

segname_t array[16]of char,<0;

size_t uint32_t
vm_prot_t uint32_t

/* Constants for the flags field of the segment_command */
segcmd_flags_t set 32 of (
  SG_HIGHVM ^ 0x1, /* the file contents for this segment is for
                    the high part of the VM space, the low part
                    is zero filled (for stacks in core files) */
  SG_FVMLIB ^ 0x2, /* this segment is the VM that is allocated by
                    a fixed VM library, for overlap checking in
                    the link editor */
  SG_NORELOC ^ 0x4, /* this segment has nothing that was relocated
                    in it and nothing relocated to it, that is
                    it maybe safely replaced without relocation*/
  SG_PROTECTED_VERSION_1 ^ 0x8 /* This segment is protected.  If the
                    segment starts at file offset 0, the
                    first page of the segment is not
                    protected.  All other pages of the
                    segment are protected. */
)


type bit

relocation_flags struc
 %$IF revbytes;
  bit4 r_type
  bit1 r_extern
  bit2 r_length //0 => 1 byte, 1 => 2-byte address, 2 => 4-byte address, 3 => 4 bytes (PPC_RELOC_BR14 r_type).
  bit1 r_pcrel //PC relative address
 %$ELSE
  bit1 r_pcrel //PC relative address
  bit2 r_length //0 => 1 byte, 1 => 2-byte address, 2 => 4-byte address, 3 => 4 bytes (PPC_RELOC_BR14 r_type).
  bit1 r_extern
  bit4 r_type
 %$END
ends       

scattered_relocation_flags struc
 %$IF revbytes;
  bit1 r_scattered //==1
  bit1 r_pcrel //PC relative address
  bit2 r_length //0 => 1 byte, 1 => 2-byte address, 2 => 4-byte address, 3 => 4 bytes (PPC_RELOC_BR14 r_type).
  bit4 r_type
 %$ELSE
  bit4 r_type
  bit2 r_length //0 => 1 byte, 1 => 2-byte address, 2 => 4-byte address, 3 => 4 bytes (PPC_RELOC_BR14 r_type).
  bit1 r_pcrel //PC relative address
  bit1 r_scattered //==1
 %$END
ends

type

scattered_relocation_info struc
 %$IF revbytes;
  scattered_relocation_flags f
  uint24_t r_address
 %$ELSE
  uint24_t r_address
  scattered_relocation_flags f
 %$END
  uint32_t/*int32_t*/ r_value
ends:assert[@.f.r_scattered]

simple_relocation_info struc
  uint32_t/*int32_t*/ r_address
  uint24_t r_symbolnum
  relocation_flags f
ends

relocation_info try
  scattered: scattered_relocation_info
  simple: simple_relocation_info
endt

relocation_data(N) array[@:N]of relocation_info
prelocation_data(N) ^relocation_data(@:N) near=uint32_t

/* Constants for the type of a section */

section_type enum uint8_t (
  S_REGULAR = 0x0, /* regular section */
  S_ZEROFILL = 0x1, /* zero fill on demand section */
  S_CSTRING_LITERALS = 0x2, /* section with only literal C strings*/
  S_4BYTE_LITERALS = 0x3, /* section with only 4 byte literals */
  S_8BYTE_LITERALS = 0x4, /* section with only 8 byte literals */
  S_LITERAL_POINTERS = 0x5, /* section with only pointers to */
                            /*  literals */
/*
 * For the two types of symbol pointers sections and the symbol stubs section
 * they have indirect symbol table entries.  For each of the entries in the
 * section the indirect symbol table entries, in corresponding order in the
 * indirect symbol table, start at the index stored in the reserved1 field
 * of the section structure.  Since the indirect symbol table entries
 * correspond to the entries in the section the number of indirect symbol table
 * entries is inferred from the size of the section divided by the size of the
 * entries in the section.  For symbol pointers sections the size of the entries
 * in the section is 4 bytes and for symbol stubs sections the byte size of the
 * stubs is stored in the reserved2 field of the section structure.
 */
  S_NON_LAZY_SYMBOL_POINTERS = 0x6, /* section with only non-lazy
                                                   symbol pointers */
  S_LAZY_SYMBOL_POINTERS = 0x7, /* section with only lazy symbol
                                                   pointers */
  S_SYMBOL_STUBS = 0x8, /* section with only symbol
                                                   stubs, byte size of stub in
                                                   the reserved2 field */
  S_MOD_INIT_FUNC_POINTERS = 0x9, /* section with only function
                                                   pointers for initialization*/
  S_MOD_TERM_FUNC_POINTERS = 0xa, /* section with only function
                                                   pointers for termination */
  S_COALESCED = 0xb, /* section contains symbols that
                                                   are to be coalesced */
  S_GB_ZEROFILL = 0xc, /* zero fill on demand section
                                                   (that can be larger than 4
                                                   gigabytes) */
  S_INTERPOSING = 0xd, /* section with only pairs of
                                                   function pointers for
                                                   interposing */
  S_16BYTE_LITERALS = 0xe, /* section with only 16 byte
                                                   literals */
  S_DTRACE_DOF = 0xf, /* section contains
                                                   DTrace Object Format */
  S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10, /* section with only lazy
                                                   symbol pointers to lazy
                                                   loaded dylibs */
/*
 * Section types to support thread local variables
 */
  S_THREAD_LOCAL_REGULAR = 0x11, /* template of initial
                                                          values for TLVs */
  S_THREAD_LOCAL_ZEROFILL = 0x12, /* template of initial
                                                          values for TLVs */
  S_THREAD_LOCAL_VARIABLES = 0x13, /* TLV descriptors */
  S_THREAD_LOCAL_VARIABLE_POINTERS = 0x14, /* pointers to TLV
                                                          descriptors */
  S_THREAD_LOCAL_INIT_FUNCTION_POINTERS = 0x15 /* functions to call
                                                          to initialize TLV
                                                          values */
)


/*
 * Constants for the section attributes part of the flags field of a section
 * structure.
 */

section_usr_attr set 8 of ( /* User setable attributes */
  S_ATTR_PURE_INSTRUCTIONS ^ 0x80, /* section contains only true
                                   machine instructions */
  S_ATTR_NO_TOC ^ 0x40, /* section contains coalesced
                        symbols that are not to be
                        in a ranlib table of contents */
  S_ATTR_STRIP_STATIC_SYMS ^ 0x20, /* ok to strip static symbols
                        in this section in files with the MH_DYLDLINK flag */
  S_ATTR_NO_DEAD_STRIP ^ 0x10, /* no dead stripping */
  S_ATTR_LIVE_SUPPORT ^ 0x08, /* blocks are live if they reference live blocks */
  S_ATTR_SELF_MODIFYING_CODE ^ 0x04, /* Used with i386 code stubs
                         written on by dyld */
/*
 * If a segment contains any sections marked with S_ATTR_DEBUG then all
 * sections in that segment must have this attribute.  No section other than
 * a section marked with this attribute may reference the contents of this
 * section.  A section with this attribute may contain no symbols and must have
 * a section type S_REGULAR.  The static linker will not copy section contents
 * from sections with this attribute into its output file.  These sections
 * generally contain DWARF debugging info.
 */
  S_ATTR_DEBUG ^ 0x02 /* a debug section */
) 

section_sys_attr set 16 of ( /* system setable attributes */
  S_ATTR_SOME_INSTRUCTIONS ^ 0x0004, /* section contains some machine instructions */
  S_ATTR_EXT_RELOC ^ 0x0002, /* section has external relocation entries */
  S_ATTR_LOC_RELOC ^ 0x0001  /* section has local relocation entries */
)

section_flags struc
 %$IF revbytes;
  section_usr_attr usr_attr
  section_sys_attr sys_attr
  section_type t
 %$ELSE
  section_type t
  section_sys_attr sys_attr
  section_usr_attr usr_attr
 %$END
ends       

section_data(Sz,Addr) raw[@:Sz] at @:Addr;:displ=('[',Hex(@:Addr),']',@)
psection_data(Sz,Addr) ^section_data(@:Sz,@:Addr) near=uint32_t

section struc /* for 32-bit architectures */
  segname_t sectname /* name of this section */
  segname_t segname /* segment this section goes in */
  size_t addr /* memory address of this section */
  size_t size /* size in bytes of this section */
  psection_data offset /* file offset of this section */
  uint32_t align /* section alignment (power of 2) */
  prelocation_data reloff /* file offset of relocation entries */
  uint32_t nreloc /* number of relocation entries */
  section_flags flags /* flags (section type and attributes)*/
  uint32_t reserved1 /* reserved (for offset or index) */
  uint32_t reserved2 /* reserved (for count or sizeof) */
 %$IF mode64;
  uint32_t reserved3 /* reserved */
 %$END
ends:[@.reloff:N=@.nreloc,@.offset:Sz=@.size,@.offset:Addr=@.offset-@.addr]:autoname=(@.segname,'.',@.sectname)


segment_command struc /* for 32-bit architectures */
  segname_t segname /* segment name */
  size_t        vmaddr /* memory address of this segment */
  size_t        vmsize /* memory size of this segment */
  size_t        fileoff /* file offset of this segment */
  size_t        filesize /* amount to map from the file */
  vm_prot_t        maxprot /* maximum VM protection */
  vm_prot_t        initprot /* initial VM protection */
  uint32_t        nsects /* number of sections in segment */
  segcmd_flags_t flags /* flags */
  array[@.nsects] of section sects
ends

dylib struc
    uint32_t name_ofs /* library's path name */
    uint32_t timestamp /* library's build time stamp */
    uint32_t current_version /* library's current version number */
    uint32_t compatibility_version /* library's compatibility vers number*/
    raw[@.name_ofs-0x18] rest
    pchar lc_str
ends

cmd_str struc
    uint32_t name_ofs /* library's path name */
    raw[@.name_ofs-0xC] rest
    pchar lc_str
ends  

type bit
n_type_tb enum bit3 (
  N_UNDF=0x0, //The symbol is undefined. Undefined symbols are symbols referenced in this module
              //but defined in a different module. The n_sect field is set to NO_SECT.
  N_ABS=0x1,  //The symbol is absolute. The linker does not change the value of an absolute symbol.
              //The n_sect field is set to NO_SECT.
  N_SECT=0x7, //The symbol is defined in the section number given in n_sect.
  N_PBUD=0x6, //The symbol is undefined and the image is using a prebound value for the symbol.
              //The n_sect field is set to NO_SECT.
  N_INDR=0x5  //The symbol is defined to be the same as another symbol. The n_value field is an
              //index into the string table specifying the name of the other symbol.
)

n_type_bt0 struc
 %$IF revbytes;
  bit3 stab
  bit1 N_PEXT
  n_type_tb T
  bit1 N_EXT
 %$ELSE
  bit1 N_EXT
  n_type_tb T
  bit1 N_PEXT
  bit3 stab
 %$END
ends

n_desc_ref_kind_t enum bit4 (
  UNDEFINED_NON_LAZY=0x0, //This symbol is a reference to an external non-lazy (data) symbol.
  UNDEFINED_LAZY=0x1, //This symbol is a reference to an external lazy symbol.that is, to a function call.
  DEFINED=0x2, //This symbol is defined in this module.
  PRIVATE_DEFINED=0x3, //This symbol is defined in this module and is visible only to modules within this shared library.
  PRIVATE_UNDEFINED_NON_LAZY=0x4, //This symbol is defined in another module in this file,
        //is a non-lazy (data) symbol, and is visible only to modules within this shared library.
  PRIVATE_UNDEFINED_LAZY=0x5  //This symbol is defined in another module in this file,
        //is a lazy (function) symbol, and is visible only to modules within this shared library.
)

n_desc_ref_flags_t set 4 of (
  REFERENCED_DYNAMICALLY ^ 0x1,//Must be set for any defined symbol that is referenced by
         //dynamic-loader APIs (such as dlsym and NSLookupSymbolInImage)
  N_NO_DEAD_STRIP ^ 0x2, //When set in a relocatable object file (file type MH_OBJECT) on a defined
         //symbol, indicates to the static linker to never dead-strip the symbol.
  N_WEAK_REF ^ 0x4, //Indicates that this undefined symbol is a weak reference. If the dynamic linker
         //cannot find a definition for this symbol, it sets the address of this symbol to 0.
  N_WEAK_DEF ^ 0x8 //Indicates that this symbol is a weak definition. If the static linker or the
         //dynamic linker finds another (non-weak) definition for this symbol, the weak definition is ignored.
)

n_desc_t struc
 %$IF revbytes;
  bit8 nLib //for MH_TWOLEVEL in mach_header
  n_desc_ref_flags_t ref_f
  n_desc_ref_kind_t ref_kind
 %$ELSE
  n_desc_ref_kind_t ref_kind
  n_desc_ref_flags_t ref_f
  bit8 nLib //for MH_TWOLEVEL in mach_header
 %$END
ends

const
  LLVMDemangle = 1; //For Delphi XE4+ .o files

%$IF LLVMDemangle;
include LLVMDemangle.rfi
type
  TSymbolName TLLVMMangledOrNotName
%$ELSE
type
  TSymbolName PChar
%$END

type

//n_type_t0 n_type_bt0()

stab_t byte():assert[@ and 0xe0<>0]

//n_type_t n_type_t0
n_type_t try
 stab: stab_t
 t: n_type_bt0
endt

p_strx_t(base) ^TSymbolName nil=0 near=uint32_t REF=@:base+@; :displ=(@^,'{',@,'}')

nlist(stroff) struc
  p_strx_t(@:stroff)/*int32_t*/ n_strx
  n_type_t n_type
  uint8_t n_sect
  n_desc_t/*int16_t*/ n_desc
  native_uint_t n_value
ends

nlist_tbl(N,stroff) array[@:N]of nlist(@:stroff)
p_nlist_tbl(N,stroff) ^nlist_tbl(@:N,@:stroff) near=uint32_t

str_tbl_t void//show the strings instead raw[@:Sz]//at 0;
p_str_tbl_t(Sz) ^str_tbl_t near=uint32_t

symtab_command struc
  p_nlist_tbl symoff
  uint32_t nsyms
  p_str_tbl_t stroff
  uint32_t strsize
ends:[@.symoff:N=@.nsyms, @.symoff:stroff=@.stroff, @.stroff:Sz=@.strsize]

dysymtab_command struc
  uint32_t ilocalsym
  uint32_t nlocalsym
  uint32_t iextdefsym
  uint32_t nextdefsym
  uint32_t iundefsym
  uint32_t nundefsym
  uint32_t tocoff
  uint32_t ntoc
  uint32_t modtaboff
  uint32_t nmodtab
  uint32_t extrefsymoff
  uint32_t nextrefsyms
  uint32_t indirectsymoff
  uint32_t nindirectsyms
  uint32_t extreloff
  uint32_t nextrel
  uint32_t locreloff
  uint32_t nlocrel
ends


load_command struc
  load_cmd_t cmd     /* type of load command */
  uint32_t cmdsize /* total size of command in bytes */
  case @.cmd of
   LC_UUID: uuid_t
   LC_SEGMENT: segment_command
   LC_LOAD_DYLIB: dylib
   LC_LOAD_DYLINKER: cmd_str
   LC_SUB_UMBRELLA,LC_SUB_CLIENT: cmd_str
   LC_SYMTAB: symtab_command
   LC_DYSYMTAB: dysymtab_command
  endc Data
  raw[] rest
ends:[@:Size=@.cmdsize]


mach_header struc
  cpu_type_t        cputype /* cpu specifier */
  cpu_subtype_t(@.cputype)   cpusubtype /* machine specifier */
  filetype_t        filetype /* type of file */
  uint32_t        ncmds /* number of load commands */
  uint32_t        sizeofcmds /* the size of all the load commands */
  fileflags_t        flags /* flags */
 %$IF mode64;
  uint32_t        reserved; /* reserved */
 %$END
  array[@.ncmds]of load_command cmds
ends:assert[@.cmds:Size=@.sizeofcmds]


data
0x4 mach_header hdr

assert hdr:assert;


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