/**
- * Copyright: Copyright Digital Mars 2010-2018.
- * License: $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
- * Authors: Jacob Carlborg
+ * This file describes the format of Mach-O object files.
+ *
+ * D header file for `mach-o/loader.h` from the macOS 10.15 SDK.
+ *
+ * Copyright: Copyright Digital Mars 2010-2019.
+ * License: $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ * Authors: Jacob Carlborg
* Version: Initial created: Feb 20, 2010-2018
- * Source: $(DRUNTIMESRC core/sys/darwin/mach/_loade.d)
+ * Source: $(DRUNTIMESRC core/sys/darwin/mach/_loader.d)
*/
module core.sys.darwin.mach.loader;
+import core.stdc.config;
+
version (CoreDdoc)
{
- /// Represents the header of a Mach-O file for 32-bit architecture.
+ /**
+ * The 32-bit mach header appears at the very beginning of the object file
+ * for 32-bit architectures.
+ */
struct mach_header
{
- /// The mach magic number identifier.
+ /// Mach magic number identifier.
uint magic;
- /// CPU specifier.
+ /// Cpu specifier.
int cputype;
/// Machine specifier.
int cpusubtype;
- /// The type of the file.
+ /// Type of file.
uint filetype;
/// Number of load commands.
uint flags;
}
- /// Represents the header of a Mach-O file for 64-bit architecture.
+ /// Constant for the magic field of the mach_header (32-bit architectures)
+ enum
+ {
+ /// The mach magic number
+ MH_MAGIC,
+
+ /// NXSwapInt(MH_MAGIC)
+ MH_CIGAM
+ }
+
+ /**
+ * The 64-bit mach header appears at the very beginning of object files for
+ * 64-bit architectures.
+ */
struct mach_header_64
{
- /// The mach magic number identifier.
+ /// Mach magic number identifier.
uint magic;
- /// CPU specifier.
+ /// Cpu specifier.
int cputype;
/// Machine specifier.
int cpusubtype;
- /// The type of the file.
+ /// Type of file.
uint filetype;
/// Number of load commands.
uint reserved;
}
- ///
- enum MH_MAGIC : uint;
+ /// Constant for the magic field of the mach_header_64 (64-bit architectures)
+ enum
+ {
+ /// The 64-bit mach magic number.
+ MH_MAGIC_64,
- ///
- enum MH_CIGAM : uint;
+ /// NXSwapInt(MH_MAGIC_64).
+ MH_CIGAM_64
+ }
- ///
- enum MH_MAGIC_64 : uint;
+ /**
+ * The layout of the file depends on the filetype. For all but the MH_OBJECT
+ * file type the segments are padded out and aligned on a segment alignment
+ * boundary for efficient demand pageing. The MH_EXECUTE, MH_FVMLIB,
+ * MH_DYLIB, MH_DYLINKER and MH_BUNDLE file types also have the headers
+ * included as part of their first segment.
+ *
+ * The file type MH_OBJECT is a compact format intended as output of the
+ * assembler and input (and possibly output) of the link editor (the .o
+ * format). All sections are in one unnamed segment with no segment padding.
+ * This format is used as an executable format when the file is so small the
+ * segment padding greatly increases its size.
+ *
+ * The file type MH_PRELOAD is an executable format intended for things that
+ * are not executed under the kernel (proms, stand alones, kernels, etc).
+ * The format can be executed under the kernel but may demand paged it and
+ * not preload it before execution.
+ *
+ * A core file is in MH_CORE format and can be any in an arbitrary legal
+ * Mach-O file.
+ *
+ * Constants for the filetype field of the mach_header
+ */
+ enum
+ {
+ /// Relocatable object file.
+ MH_OBJECT,
- ///
- enum MH_CIGAM_64 : uint;
+ /// Demand paged executable file.
+ MH_EXECUTE,
- ///
- enum SEG_PAGEZERO : string;
+ /// Fixed VM shared library file.
+ MH_FVMLIB,
- ///
- enum SEG_TEXT : string;
+ /// Core file.
+ MH_CORE,
- ///
- enum SECT_TEXT : string;
+ /// Preloaded executable file.
+ MH_PRELOAD,
- ///
- enum SECT_FVMLIB_INIT0 : string;
+ /// Dynamically bound shared library.
+ MH_DYLIB,
- ///
- enum SECT_FVMLIB_INIT1 : string;
+ /// Dynamic link editor.
+ MH_DYLINKER,
- ///
- enum SEG_DATA : string;
+ /// Dynamically bound bundle file.
+ MH_BUNDLE,
- ///
- enum SECT_DATA : string;
+ /// Shared library stub for static linking only, no section contents.
+ MH_DYLIB_STUB,
- ///
- enum SECT_BSS : string;
+ /// Companion file with only debug sections.
+ MH_DSYM,
- ///
- enum SECT_COMMON : string;
+ /// X86_64 kexts.
+ MH_KEXT_BUNDLE
+ }
- ///
- enum SEG_OBJC : string;
- ///
- enum SECT_OBJC_SYMBOLS : string;
+ /// Constants for the flags field of the mach_header
+ enum
+ {
+ /// The object file has no undefined references.
+ MH_NOUNDEFS,
- ///
- enum SECT_OBJC_MODULES : string;
+ /**
+ * The object file is the output of an incremental link against a base
+ * file and can't be link edited again.
+ */
+ MH_INCRLINK,
- ///
- enum SECT_OBJC_STRINGS : string;
+ /**
+ * The object file is input for the dynamic linker and can't be
+ * statically link edited again.
+ */
+ MH_DYLDLINK,
- ///
- enum SECT_OBJC_REFS : string;
+ /**
+ * The object file's undefined references are bound by the dynamic
+ * linker when loaded.
+ */
+ MH_BINDATLOAD,
+
+ /// The file has its dynamic undefined references prebound.
+ MH_PREBOUND,
- ///
- enum SEG_ICON : string;
+ /// The file has its read-only and read-write segments split.
+ MH_SPLIT_SEGS,
- ///
- enum SECT_ICON_HEADER : string;
+ /**
+ * The shared library init routine is to be run lazily via catching
+ * memory faults to its writeable segments (obsolete).
+ */
+ MH_LAZY_INIT,
- ///
- enum SECT_ICON_TIFF : string;
+ /// The image is using two-level name space bindings.
+ MH_TWOLEVEL,
- ///
- enum SEG_LINKEDIT : string;
+ /// The executable is forcing all images to use flat name space bindings.
+ MH_FORCE_FLAT,
+
+ /**
+ * This umbrella guarantees no multiple definitions of symbols in its
+ * sub-images so the two-level namespace hints can always be used.
+ */
+ MH_NOMULTIDEFS,
+
+ /// Do not have dyld notify the prebinding agent about this executable.
+ MH_NOFIXPREBINDING,
+
+ /**
+ * The binary is not prebound but can have its prebinding redone. only
+ * used when MH_PREBOUND is not set.
+ */
+ MH_PREBINDABLE,
+
+ /**
+ * 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_ALLMODSBOUND,
+
+ /**
+ * Safe to divide up the sections into sub-sections via symbols for dead
+ * code stripping.
+ */
+ MH_SUBSECTIONS_VIA_SYMBOLS,
+
+ /// The binary has been canonicalized via the unprebind operation.
+ MH_CANONICAL,
+
+ /// The final linked image contains external weak symbols.
+ MH_WEAK_DEFINES,
+
+ /// The final linked image uses weak symbols.
+ MH_BINDS_TO_WEAK,
+
+
+
+ /**
+ * When this bit is set, all stacks in the task will be given stack
+ * execution privilege. Only used in MH_EXECUTE filetypes.
+ */
+ MH_ALLOW_STACK_EXECUTION,
+
+ /**
+ * When this bit is set, the binary declares it is safe for use in
+ * processes with uid zero.
+ */
+ MH_ROOT_SAFE,
+
+
+
+ /**
+ * When this bit is set, the binary declares it is safe for use in
+ * processes when issetugid() is true.
+ */
+ MH_SETUID_SAFE,
+
+
+
+ /**
+ * 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_NO_REEXPORTED_DYLIBS,
+
+ /**
+ * When this bit is set, the OS will load the main executable at a
+ * random address. Only used in MH_EXECUTE filetypes.
+ */
+ MH_PIE,
+
+ /**
+ * 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_DEAD_STRIPPABLE_DYLIB,
+
+ /// Contains a section of type S_THREAD_LOCAL_VARIABLES.
+ MH_HAS_TLV_DESCRIPTORS,
+
+
+
+ /**
+ * 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.
+ */
+ MH_NO_HEAP_EXECUTION,
+
+
+
+ /// The code was linked for use in an application extension..
+ MH_APP_EXTENSION_SAFE,
+
+
+
+ /**
+ * The external symbols listed in the nlist symbol table do not include
+ * all the symbols listed in the dyld info.
+ */
+ MH_NLIST_OUTOFSYNC_WITH_DYLDINFO,
+
+ /**
+ * Allow LC_MIN_VERSION_MACOS and LC_BUILD_VERSION load commands with
+ * the platforms macOS, iOSMac, iOSSimulator, tvOSSimulator and
+ * watchOSSimulator.
+ */
+ MH_SIM_SUPPORT,
+
+ /**
+ * Only for use on dylibs. When this bit is set, the dylib is part of
+ * the dyld shared cache, rather than loose in the filesystem.
+ */
+ MH_DYLIB_IN_CACHE
+ }
+
+ /**
+ * The load commands directly follow the mach_header. The total size of all
+ * of the commands is given by the sizeofcmds field in the mach_header. All
+ * load commands must have as their first two fields cmd and cmdsize. The
+ * cmd field is filled in with a constant for that command type. Each
+ * command type has a structure specifically for it. The cmdsize field is
+ * the size in bytes of the particular load command structure plus anything
+ * that follows it that is a part of the load command
+ * (i.e. section structures, strings, etc.). To advance to the next load
+ * command the cmdsize can be added to the offset or pointer of the current
+ * load command. The cmdsize for 32-bit architectures MUST be a multiple of
+ * 4 bytes and for 64-bit architectures MUST be a multiple of 8 bytes
+ * (these are forever the maximum alignment of any load commands). The
+ * padded bytes must be zero. All tables in the object file must also
+ * follow these rules so the file can be memory mapped. Otherwise the
+ * pointers to these tables will not work well or at all on some machines.
+ * With all padding zeroed like objects will compare byte for byte.
+ */
+ struct load_command
+ {
+ /// Type of load command.
+ uint cmd;
+
+ /// Total size of command in bytes.
+ uint cmdsize;
+ }
+
+ /**
+ * After MacOS X 10.1 when a new load command is added that is required to
+ * be understood by the dynamic linker for the image to execute properly the
+ * LC_REQ_DYLD bit will be or'ed into the load command constant. If the
+ * dynamic linker sees such a load command it it does not understand will
+ * issue a "unknown load command required for execution" error and refuse to
+ * use the image. Other load commands without this bit that are not
+ * understood will simply be ignored.
+ */
+ enum LC_REQ_DYLD;
+
+ /// Constants for the cmd field of all load commands, the type.
+ enum
+ {
+ /// Segment of this file to be mapped.
+ LC_SEGMENT,
+
+ /// Link-edit stab symbol table info.
+ LC_SYMTAB,
+
+ /// Link-edit gdb symbol table info (obsolete).
+ LC_SYMSEG,
+
+ /// Thread.
+ LC_THREAD,
+
+ /// Unix thread (includes a stack).
+ LC_UNIXTHREAD,
+
+ /// Load a specified fixed VM shared library.
+ LC_LOADFVMLIB,
+
+ /// Fixed VM shared library identification.
+ LC_IDFVMLIB,
+
+ /// Object identification info (obsolete).
+ LC_IDENT,
+
+ /// Fixed VM file inclusion (internal use).
+ LC_FVMFILE,
+
+ /// Prepage command (internal use).
+ LC_PREPAGE,
+
+ /// Dynamic link-edit symbol table info.
+ LC_DYSYMTAB,
+
+ /// Load a dynamically linked shared library.
+ LC_LOAD_DYLIB,
+
+ /// Dynamically linked shared lib ident.
+ LC_ID_DYLIB,
+
+ /// Load a dynamic linker.
+ LC_LOAD_DYLINKER,
+
+ /// Dynamic linker identification.
+ LC_ID_DYLINKER,
+
+ /// Modules prebound for a dynamically linked shared library.
+ LC_PREBOUND_DYLIB,
+
+ /// Image routines.
+ LC_ROUTINES,
+
+ /// Sub framework.
+ LC_SUB_FRAMEWORK,
+
+ /// Sub umbrella.
+ LC_SUB_UMBRELLA,
+
+ /// Sub client.
+ LC_SUB_CLIENT,
+
+ /// Sub library.
+ LC_SUB_LIBRARY,
+
+ /// Two-level namespace lookup hints.
+ LC_TWOLEVEL_HINTS,
+
+ /// Prebind checksum.
+ LC_PREBIND_CKSUM
+ }
+
+ /**
+ * Load a dynamically linked shared library that is allowed to be missing
+ * (all symbols are weak imported).
+ */
///
- enum SEG_UNIXSTACK : string;
+ enum LC_LOAD_WEAK_DYLIB;
///
- enum SEG_IMPORT : string;
+ enum
+ {
+ /// 64-bit segment of this file to be mapped.
+ LC_SEGMENT_64,
+
+ /// 64-bit image routines.
+ LC_ROUTINES_64,
+
+ /// The uuid.
+ LC_UUID,
+
+ /// Runpath additions.
+ LC_RPATH,
+
+ /// Local of code signature.
+ LC_CODE_SIGNATURE,
+
+ /// Local of info to split segments.
+ LC_SEGMENT_SPLIT_INFO,
+
+ /// Load and re-export dylib.
+ LC_REEXPORT_DYLIB,
+
+ /// Delay load of dylib until first use.
+ LC_LAZY_LOAD_DYLIB,
+
+ /// Encrypted segment information.
+ LC_ENCRYPTION_INFO,
+
+ /// Compressed dyld information.
+ LC_DYLD_INFO,
+
+ /// Compressed dyld information only.
+ LC_DYLD_INFO_ONLY,
+
+ /// Load upward dylib.
+ LC_LOAD_UPWARD_DYLIB,
+
+ /// Build for MacOSX min OS version.
+ LC_VERSION_MIN_MACOSX,
+
+ /// Build for iPhoneOS min OS version.
+ LC_VERSION_MIN_IPHONEOS,
+
+ /// Compressed table of function start addresses.
+ LC_FUNCTION_STARTS,
+
+ /// String for dyld to treat like environment variable.
+ LC_DYLD_ENVIRONMENT,
+
+ /// Replacement for LC_UNIXTHREAD.
+ LC_MAIN,
+
+ /// Table of non-instructions in __text.
+ LC_DATA_IN_CODE,
+
+ /// Source version used to build binary.
+ LC_SOURCE_VERSION,
+
+ /// Code signing DRs copied from linked dylibs.
+ LC_DYLIB_CODE_SIGN_DRS,
+
+ /// 64-bit encrypted segment information.
+ LC_ENCRYPTION_INFO_64,
+
+ /// Linker options in MH_OBJECT files.
+ LC_LINKER_OPTION,
+
+ /// Optimization hints in MH_OBJECT files.
+ LC_LINKER_OPTIMIZATION_HINT,
+
+ /// Build for AppleTV min OS version.
+ LC_VERSION_MIN_TVOS,
+
+ /// Build for Watch min OS version.
+ LC_VERSION_MIN_WATCHOS,
+
+ /// Arbitrary data included within a Mach-O file.
+ LC_NOTE,
+
+ /// Build for platform min OS version.
+ LC_BUILD_VERSION,
+
+ /// Used with linkedit_data_command, payload is trie.
+ LC_DYLD_EXPORTS_TRIE,
+
+ /// Used with linkedit_data_command.
+ LC_DYLD_CHAINED_FIXUPS
+ }
+
- /// Represents a segment command in a Mach-O file for 32-bit architecture.
+ /**
+ * A variable length string in a load command is represented by an lc_str
+ * union. The strings are stored just after the load command structure and
+ * the offset is from the start of the load command structure. The size
+ * of the string is reflected in the cmdsize field of the load command.
+ * Once again any padded bytes to bring the cmdsize field to a multiple
+ * of 4 bytes must be zero.
+ */
+ union lc_str
+ {
+ /// Offset to the string.
+ uint offset;
+
+ /// Pointer to the string (only available on non 64 bit platforms).
+ char* ptr;
+ }
+
+ /**
+ * The segment load command indicates that a part of this file is to be
+ * mapped into the task's address space. The size of this segment in memory,
+ * vmsize, maybe equal to or larger than the amount to map from this file,
+ * filesize. The file is mapped starting at fileoff to the beginning of
+ * the segment in memory, vmaddr. The rest of the memory of the segment,
+ * if any, is allocated zero fill on demand. The segment's maximum virtual
+ * memory protection and initial virtual memory protection are specified
+ * by the maxprot and initprot fields. If the segment has sections then the
+ * section structures directly follow the segment command and their size is
+ * reflected in cmdsize.
+ */
struct segment_command
{
- /// Type of load command, i.e. `LC_SEGMENT`.
+ /// LC_SEGMENT.
uint cmd;
- /// The size of this segment, includes size of section structs.
+ /// Includes sizeof section structs.
uint cmdsize;
- /// The name of this segment.
- char[16] segname = 0;
+ /// Segment name.
+ char[16] segname;
/// Memory address of this segment.
uint vmaddr;
/// Initial VM protection.
int initprot;
- /// Number of sections in this segment.
+ /// Number of sections in segment.
uint nsects;
/// Flags.
uint flags;
}
- /// Represents a segment command in a Mach-O file for 64-bit architecture.
+ /*
+ * The 64-bit segment load command indicates that a part of this file is to
+ * be mapped into a 64-bit task's address space. If the 64-bit segment has
+ * sections then section_64 structures directly follow the 64-bit segment
+ * command and their size is reflected in cmdsize.
+ */
struct segment_command_64
{
- /// Type of load command, i.e. `LC_SEGMENT`.
+ /// LC_SEGMENT_64.
uint cmd;
- /// The size of this segment, includes size of section structs.
+ /// Includes sizeof section_64 structs.
uint cmdsize;
- /// The name of this segment.
- char[16] segname = 0;
+ /// Segment name.
+ char[16] segname;
/// Memory address of this segment.
- long vmaddr;
+ ulong vmaddr;
/// Memory size of this segment.
- long vmsize;
+ ulong vmsize;
/// File offset of this segment.
- long fileoff;
+ ulong fileoff;
/// Amount to map from the file.
- long filesize;
+ ulong filesize;
/// Maximum VM protection.
int maxprot;
/// Initial VM protection.
int initprot;
- /// Number of sections in this segment.
+ /// Number of sections in segment.
uint nsects;
/// Flags.
uint flags;
}
- /// Represents a section in a Mach-O file for 32-bit architecture.
+ /// Constants for the flags field of the segment_command.
+ enum
+ {
+ /**
+ * 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_HIGHVM,
+
+ /**
+ * This segment is the VM that is allocated by a fixed VM library,
+ * for overlap checking in the link editor.
+ */
+ SG_FVMLIB,
+
+ /**
+ * This segment has nothing that was relocated in it and nothing
+ * relocated to it, that is it maybe safely replaced without relocation.
+ */
+ SG_NORELOC,
+
+ /**
+ * 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.
+ */
+ SG_PROTECTED_VERSION_1,
+
+ /// This segment is made read-only after fixups.
+ SG_READ_ONLY
+ }
+
+
+ /**
+ * A segment is made up of zero or more sections. Non-MH_OBJECT files have
+ * all of their segments with the proper sections in each, and padded to the
+ * specified segment alignment when produced by the link editor. The first
+ * segment of a MH_EXECUTE and MH_FVMLIB format file contains the
+ * mach_header and load commands of the object file before its first
+ * section. The zero fill sections are always last in their segment
+ * (in all formats). This allows the zeroroed segment padding to be mapped
+ * into memory where zero fill sections might be. The gigabyte zero fill
+ * sections, those with the section type S_GB_ZEROFILL, can only be in a
+ * segment with sections of this type. These segments are then placed after
+ * all other segments.
+ *
+ * The MH_OBJECT format has all of its sections in one segment for
+ * compactness. There is no padding to a specified segment boundary and the
+ * mach_header and load commands are not part of the segment.
+ *
+ * Sections with the same section name, sectname, going into the same
+ * segment, segname, are combined by the link editor. The resulting section,
+ * is aligned to the maximum alignment of the combined sections and is the
+ * new section's alignment. The combined sections are aligned to their
+ * original alignment in the combined section. Any padded bytes to get the
+ * specified alignment are zeroed.
+ *
+ * The format of the relocation entries referenced by the reloff and nreloc
+ * fields of the section structure for mach object files is described in the
+ * header file <reloc.h>.
+ */
struct section
{
- /// The name of this this section.
- char[16] sectname = 0;
+ /// Name of this section.
+ char[16] sectname;
- /// The name of the segment this section belongs to.
- char[16] segname = 0;
+ /// Segment this section goes in.
+ char[16] segname;
- /// The memory address of this section.
+ /// Memory address of this section.
uint addr;
- /// The size of this section in bytes.
+ /// Size in bytes of this section.
uint size;
- /// The file offset of this section.
+ /// File offset of this section.
uint offset;
- /// The alignment (power of two) of this section.
+ /// Section alignment (power of 2).
uint align_;
- /// The file offset of the relocation entries.
+ /// File offset of relocation entries.
uint reloff;
- /// The number of relocation entries.
+ /// Number of relocation entries.
uint nreloc;
- /// Flags, section type and attributes.
+ /// Flags (section type and attributes).
uint flags;
- /// Reserved.
+ /// Reserved (for offset or index).
uint reserved1;
- /// Reserved.
+ /// Reserved (for count or sizeof).
uint reserved2;
}
- /// Represents a section in a Mach-O file for 64-bit architecture.
+ ///
struct section_64
{
- /// The name of this this section.
- char[16] sectname = 0;
+ /// Name of this section.
+ char[16] sectname;
- /// The name of the segment this section belongs to.
- char[16] segname = 0;
+ /// Segment this section goes in.
+ char[16] segname;
- /// The memory address of this section.
+ /// Memory address of this section.
ulong addr;
- /// The size of this section in bytes.
+ /// Size in bytes of this section.
ulong size;
- /// The file offset of this section.
+ /// File offset of this section.
uint offset;
- /// The alignment (power of two) of this section.
+ /// Section alignment (power of 2).
uint align_;
- /// The file offset of the relocation entries.
+ /// File offset of relocation entries.
uint reloff;
- /// The number of relocation entries.
+ /// Number of relocation entries.
uint nreloc;
- /// Flags, section type and attributes.
+ /// Flags (section type and attributes).
uint flags;
- /// Reserved.
+ /// Reserved (for offset or index).
uint reserved1;
- /// Reserved.
+ /// Reserved (for count or sizeof).
uint reserved2;
/// Reserved.
uint reserved3;
}
-}
-else version (OSX)
- version = Darwin;
-else version (iOS)
- version = Darwin;
-else version (TVOS)
- version = Darwin;
-else version (WatchOS)
- version = Darwin;
+ /**
+ * The flags field of a section structure is separated into two parts a section
+ * type and section attributes. The section types are mutually exclusive (it
+ * can only have one type) but the section attributes are not (it may have more
+ * than one attribute).
+ */
+ enum
+ {
+ /// 256 section types.
+ SECTION_TYPE,
-version (Darwin):
-extern (C):
+ /// 24 section attributes.
+ SECTION_ATTRIBUTES
+ }
-struct mach_header
-{
- uint magic;
- int cputype;
- int cpusubtype;
- uint filetype;
- uint ncmds;
- uint sizeofcmds;
- uint flags;
-}
+ /// Constants for the type of a section.
+ enum
+ {
+ /// Regular section.
+ S_REGULAR,
-struct mach_header_64
-{
- uint magic;
- int cputype;
- int cpusubtype;
- uint filetype;
- uint ncmds;
- uint sizeofcmds;
- uint flags;
- uint reserved;
-}
+ /// Zero fill on demand section.
+ S_ZEROFILL,
-enum uint MH_MAGIC = 0xfeedface;
-enum uint MH_CIGAM = 0xcefaedfe;
-enum uint MH_MAGIC_64 = 0xfeedfacf;
-enum uint MH_CIGAM_64 = 0xcffaedfe;
-
-enum SEG_PAGEZERO = "__PAGEZERO";
-enum SEG_TEXT = "__TEXT";
-enum SECT_TEXT = "__text";
-enum SECT_FVMLIB_INIT0 = "__fvmlib_init0";
-enum SECT_FVMLIB_INIT1 = "__fvmlib_init1";
-enum SEG_DATA = "__DATA";
-enum SECT_DATA = "__data";
-enum SECT_BSS = "__bss";
-enum SECT_COMMON = "__common";
-enum SEG_OBJC = "__OBJC";
-enum SECT_OBJC_SYMBOLS = "__symbol_table";
-enum SECT_OBJC_MODULES = "__module_info";
-enum SECT_OBJC_STRINGS = "__selector_strs";
-enum SECT_OBJC_REFS = "__selector_refs";
-enum SEG_ICON = "__ICON";
-enum SECT_ICON_HEADER = "__header";
-enum SECT_ICON_TIFF = "__tiff";
-enum SEG_LINKEDIT = "__LINKEDIT";
-enum SEG_UNIXSTACK = "__UNIXSTACK";
-enum SEG_IMPORT = "__IMPORT";
+ /// Section with only literal C strings.
+ S_CSTRING_LITERALS,
-struct segment_command
-{
- uint cmd;
- uint cmdsize;
- char[16] segname = 0;
- uint vmaddr;
- uint vmsize;
- uint fileoff;
- uint filesize;
- int maxprot;
- int initprot;
- uint nsects;
- uint flags;
-}
+ /// Section with only 4 byte literals.
+ S_4BYTE_LITERALS,
-struct segment_command_64
-{
- uint cmd;
- uint cmdsize;
- char[16] segname = 0;
- long vmaddr;
- long vmsize;
- long fileoff;
- long filesize;
- int maxprot;
- int initprot;
- uint nsects;
- uint flags;
-}
+ /// Section with only 8 byte literals.
+ S_8BYTE_LITERALS,
-struct section
-{
- char[16] sectname = 0;
- char[16] segname = 0;
- uint addr;
- uint size;
- uint offset;
- uint align_;
- uint reloff;
- uint nreloc;
- uint flags;
- uint reserved1;
- uint reserved2;
-}
+ /// Section with only pointers to literals.
+ S_LITERAL_POINTERS,
+
+ /**
+ * Section with only non-lazy symbol pointers.
+ *
+ * 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,
+
+ /// Section with only lazy symbol pointers.
+ S_LAZY_SYMBOL_POINTERS,
+
+ /// Section with only symbol stubs, byte size of stub in the reserved2 field.
+ S_SYMBOL_STUBS,
+
+ /// Section with only function pointers for initialization.
+ S_MOD_INIT_FUNC_POINTERS,
+
+ /// Section with only function pointers for termination.
+ S_MOD_TERM_FUNC_POINTERS,
+
+ /// Section contains symbols that are to be coalesced.
+ S_COALESCED,
+
+ /// Zero fill on demand section (that can be larger than 4 gigabytes).
+ S_GB_ZEROFILL,
+
+ /// Section with only pairs of function pointers for interposing.
+ S_INTERPOSING,
+
+ /// Section with only 16 byte literals.
+ S_16BYTE_LITERALS,
+
+ /// Section contains DTrace Object Format.
+ S_DTRACE_DOF,
+
+ /// Section with only lazy symbol pointers to lazy loaded dylibs.
+ S_LAZY_DYLIB_SYMBOL_POINTERS,
+
+
+
+ // Section types to support thread local variables.
+
+ /// Template of initial values for TLVs.
+ S_THREAD_LOCAL_REGULAR,
+
+ /// Template of initial values for TLVs.
+ S_THREAD_LOCAL_ZEROFILL,
+
+ /// TLV descriptors.
+ S_THREAD_LOCAL_VARIABLES,
+
+ /// Pointers to TLV descriptors.
+ S_THREAD_LOCAL_VARIABLE_POINTERS,
+
+ /// Functions to call to initialize TLV values.
+ S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
+
+ /// 32-bit offsets to initializers.
+ S_INIT_FUNC_OFFSETS
+ }
+
+ /**
+ * Constants for the section attributes part of the flags field of a section
+ * structure.
+ */
+ enum
+ {
+ /// User setable attributes.
+ SECTION_ATTRIBUTES_USR,
+
+ /// Section contains only true machine instructions.
+ S_ATTR_PURE_INSTRUCTIONS,
+
+ /// Section contains coalesced symbols that are not to be in a ranlib table of contents.
+ S_ATTR_NO_TOC,
+
+ /// Ok to strip static symbols in this section in files with the MH_DYLDLINK flag.
+ S_ATTR_STRIP_STATIC_SYMS,
+
+ /// No dead stripping.
+ S_ATTR_NO_DEAD_STRIP,
+
+ /// Blocks are live if they reference live blocks.
+ S_ATTR_LIVE_SUPPORT,
+
+ /// Used with i386 code stubs written on by dyld.
+ S_ATTR_SELF_MODIFYING_CODE,
+
+ /**
+ * A debug section.
+ *
+ * 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,
+
+ /// System setable attributes.
+ SECTION_ATTRIBUTES_SYS,
+
+ /// Section contains some machine instructions.
+ S_ATTR_SOME_INSTRUCTIONS,
+
+ /// Section has external relocation entries.
+ S_ATTR_EXT_RELOC,
+
+ /// Section has local relocation entries.
+ S_ATTR_LOC_RELOC
+ }
+
+ /**
+ * The names of segments and sections in them are mostly meaningless to the
+ * link-editor. But there are few things to support traditional UNIX
+ * executables that require the link-editor and assembler to use some names
+ * agreed upon by convention.
+ *
+ * The initial protection of the "__TEXT" segment has write protection
+ * turned off (not writeable).
+ *
+ * The link-editor will allocate common symbols at the end of the "__common"
+ * section in the "__DATA" segment. It will create the section and segment
+ * if needed.
+ *
+ * The currently known segment names and the section names in those segments.
+ */
+ enum
+ {
+ /**
+ * The pagezero segment which has no protections and catches NULL
+ * references for MH_EXECUTE files.
+ */
+ SEG_PAGEZERO,
+
+
+
+ /// The tradition UNIX text segment.
+ SEG_TEXT,
+
+ /// The real text part of the text section no headers, and no padding.
+ SECT_TEXT,
+
+ /// The fvmlib initialization section.
+ SECT_FVMLIB_INIT0,
+
+ /// The section following the fvmlib initialization section.
+ SECT_FVMLIB_INIT1,
+
+
+
+ /// The tradition UNIX data segment.
+ SEG_DATA,
+
+ /// The real initialized data section no padding, no bss overlap.
+ SECT_DATA,
+
+ /// The real uninitialized data section no padding.
+ SECT_BSS,
+
+ /// The section common symbols are allocated in by the link editor.
+ SECT_COMMON,
-struct section_64
-{
- char[16] sectname = 0;
- char[16] segname = 0;
- ulong addr;
- ulong size;
- uint offset;
- uint align_;
- uint reloff;
- uint nreloc;
- uint flags;
- uint reserved1;
- uint reserved2;
- uint reserved3;
-}
+
+ /// Objective-C runtime segment.
+ SEG_OBJC,
+
+ /// Symbol table.
+ SECT_OBJC_SYMBOLS,
+
+ /// Module information.
+ SECT_OBJC_MODULES,
+
+ /// String table.
+ SECT_OBJC_STRINGS,
+
+ /// String table.
+ SECT_OBJC_REFS,
+
+
+
+ /// The icon segment.
+ SEG_ICON,
+
+ /// The icon headers.
+ SECT_ICON_HEADER,
+
+ /// The icons in tiff format.
+ SECT_ICON_TIFF,
+
+
+
+ /**
+ * The segment containing all structs created and maintained by the link
+ * editor. Created with -seglinkedit option to ld(1) for MH_EXECUTE and
+ * FVMLIB file types only.
+ */
+ SEG_LINKEDIT,
+
+
+ /// The unix stack segment.
+ SEG_UNIXSTACK,
+
+
+ /**
+ * The segment for the self (dyld) modifing code stubs that has read,
+ * write and execute permissions.
+ */
+ SEG_IMPORT
+ }
+
+ /**
+ * Fixed virtual memory shared libraries are identified by two things. The
+ * target pathname (the name of the library as found for execution), and the
+ * minor version number. The address of where the headers are loaded is in
+ * header_addr. (THIS IS OBSOLETE and no longer supported).
+ */
+ struct fvmlib
+ {
+ /// Library's target pathname.
+ lc_str name;
+
+ /// Library's minor version number.
+ uint minor_version;
+
+ /// Library's header address.
+ uint header_addr;
+ }
+
+ /**
+ * A fixed virtual shared library (filetype == MH_FVMLIB in the mach header)
+ * contains a fvmlib_command (cmd == LC_IDFVMLIB) to identify the library.
+ * An object that uses a fixed virtual shared library also contains a
+ * fvmlib_command (cmd == LC_LOADFVMLIB) for each library it uses.
+ * (THIS IS OBSOLETE and no longer supported).
+ */
+ struct fvmlib_command
+ {
+ /// LC_IDFVMLIB or LC_LOADFVMLIB.
+ uint cmd;
+
+ /// Includes pathname string.
+ uint cmdsize;
+
+ /// The library identification.
+ fvmlib fvmlib_;
+ }
+
+ /**
+ * Dynamically linked shared libraries are identified by two things. The
+ * pathname (the name of the library as found for execution), and the
+ * compatibility version number. The pathname must match and the
+ * compatibility number in the user of the library must be greater than or
+ * equal to the library being used. The time stamp is used to record the
+ * time a library was built and copied into user so it can be use to
+ * determined if the library used at runtime is exactly the same as used to
+ * built the program.
+ */
+ struct dylib
+ {
+ /// Library's path name.
+ lc_str name;
+
+ /// Library's build time stamp.
+ uint timestamp;
+
+ /// Library's current version number.
+ uint current_version;
+
+ /// Library's compatibility version number.
+ uint compatibility_version;
+ }
+
+ /**
+ * A dynamically linked shared library
+ * (filetype == MH_DYLIB in the mach header) contains a dylib_command
+ * (cmd == LC_ID_DYLIB) to identify the library. An object that uses a
+ * dynamically linked shared library also contains a dylib_command
+ * (cmd == LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, or LC_REEXPORT_DYLIB) for each
+ * library it uses.
+ */
+ struct dylib_command
+ {
+ /// LC_ID_DYLIB, LC_LOAD_{,WEAK_}DYLIB, LC_REEXPORT_DYLIB.
+ uint cmd;
+
+ /// Includes pathname string.
+ uint cmdsize;
+
+ /// The library identification.
+ dylib dylib_;
+ }
+
+ /**
+ * A dynamically linked shared library may be a subframework of an umbrella
+ * framework. If so it will be linked with "-umbrella umbrella_name" where
+ * Where "umbrella_name" is the name of the umbrella framework. A
+ * subframework can only be linked against by its umbrella framework or
+ * other subframeworks that are part of the same umbrella framework.
+ * Otherwise the static link editor produces an error and states to link
+ * against the umbrella framework. The name of the umbrella framework for
+ * subframeworks is recorded in the following structure.
+ */
+ struct sub_framework_command
+ {
+ /// LC_SUB_FRAMEWORK.
+ uint cmd;
+
+ /// Includes umbrella string.
+ uint cmdsize;
+
+ /// The umbrella framework name.
+ lc_str umbrella;
+ }
+
+ /**
+ * For dynamically linked shared libraries that are subframework of an
+ * umbrella framework they can allow clients other than the umbrella
+ * framework or other subframeworks in the same umbrella framework. To do
+ * this the subframework is built with "-allowable_client client_name" and
+ * an LC_SUB_CLIENT load command is created for each -allowable_client flag.
+ * The client_name is usually a framework name. It can also be a name used
+ * for bundles clients where the bundle is built with
+ * "-client_name client_name".
+ */
+ struct sub_client_command
+ {
+ /// LC_SUB_CLIENT.
+ uint cmd;
+
+ /// Includes client string.
+ uint cmdsize;
+
+ /// The client name.
+ lc_str client;
+ }
+
+ /**
+ * A dynamically linked shared library may be a sub_umbrella of an umbrella
+ * framework. If so it will be linked with "-sub_umbrella umbrella_name"
+ * where "umbrella_name" is the name of the sub_umbrella framework. When
+ * statically linking when -twolevel_namespace is in effect a twolevel
+ * namespace umbrella framework will only cause its subframeworks and those
+ * frameworks listed as sub_umbrella frameworks to be implicited linked in.
+ * Any other dependent dynamic libraries will not be linked it when
+ * -twolevel_namespace is in effect. The primary library recorded by the
+ * static linker when resolving a symbol in these libraries will be the
+ * umbrella framework. Zero or more sub_umbrella frameworks may be use by an
+ * umbrella framework. The name of a sub_umbrella framework is recorded in
+ * the following structure.
+ */
+ struct sub_umbrella_command
+ {
+ /// LC_SUB_UMBRELLA.
+ uint cmd;
+
+ /// Includes sub_umbrella string.
+ uint cmdsize;
+
+ /// The sub_umbrella framework name.
+ lc_str sub_umbrella;
+ }
+
+ /**
+ * A dynamically linked shared library may be a sub_library of another
+ * shared library. If so it will be linked with "-sub_library library_name"
+ * where "library_name" is the name of the sub_library shared library. When
+ * statically linking when -twolevel_namespace is in effect a twolevel
+ * namespace shared library will only cause its subframeworks and those
+ * frameworks listed as sub_umbrella frameworks and libraries listed as
+ * sub_libraries to be implicited linked in. Any other dependent dynamic
+ * libraries will not be linked it when -twolevel_namespace is in effect.
+ * The primary library recorded by the static linker when resolving a symbol
+ * in these libraries will be the umbrella framework (or dynamic library).
+ * Zero or more sub_library shared libraries may be use by an umbrella
+ * framework or (or dynamic library). The name of a sub_library framework is
+ * recorded in the following structure. For example
+ * /usr/lib/libobjc_profile.A.dylib would be recorded as "libobjc".
+ */
+ struct sub_library_command
+ {
+ /// LC_SUB_LIBRARY.
+ uint cmd;
+
+ /// Includes sub_library string.
+ uint cmdsize;
+
+ /// The sub_library name.
+ lc_str sub_library;
+ }
+
+ /**
+ * A program (filetype == MH_EXECUTE) that is
+ * prebound to its dynamic libraries has one of these for each library that
+ * the static linker used in prebinding. It contains a bit vector for the
+ * modules in the library. The bits indicate which modules are bound (1) and
+ * which are not (0) from the library. The bit for module 0 is the low bit
+ * of the first byte. So the bit for the Nth module is:
+ * (linked_modules[N/8] >> N%8) & 1
+ */
+ struct prebound_dylib_command
+ {
+ /// LC_PREBOUND_DYLIB.
+ uint cmd;
+
+ /// Includes strings.
+ uint cmdsize;
+
+ /// Library's path name.
+ lc_str name;
+
+ /// Number of modules in library.
+ uint nmodules;
+
+ /// Bit vector of linked modules.
+ lc_str linked_modules;
+ }
+
+ /**
+ * A program that uses a dynamic linker contains a dylinker_command to
+ * identify the name of the dynamic linker (LC_LOAD_DYLINKER). And a dynamic
+ * linker contains a dylinker_command to identify the dynamic linker
+ * (LC_ID_DYLINKER). A file can have at most one of these.
+ * This struct is also used for the LC_DYLD_ENVIRONMENT load command and
+ * contains string for dyld to treat like environment variable.
+ */
+ struct dylinker_command
+ {
+ /// LC_ID_DYLINKER, LC_LOAD_DYLINKER or LC_DYLD_ENVIRONMENT.
+ uint cmd;
+
+ /// Includes pathname string.
+ uint cmdsize;
+
+ /// Dynamic linker's path name.
+ lc_str name;
+ }
+
+ /**
+ * Thread commands contain machine-specific data structures suitable for
+ * use in the thread state primitives. The machine specific data structures
+ * follow the struct thread_command as follows.
+ * Each flavor of machine specific data structure is preceded by an uint32_t
+ * constant for the flavor of that data structure, an uint32_t that is the
+ * count of uint32_t's of the size of the state data structure and then
+ * the state data structure follows. This triple may be repeated for many
+ * flavors. The constants for the flavors, counts and state data structure
+ * definitions are expected to be in the header file <machine/thread_status.h>.
+ * These machine specific data structures sizes must be multiples of
+ * 4 bytes. The cmdsize reflects the total size of the thread_command
+ * and all of the sizes of the constants for the flavors, counts and state
+ * data structures.
+ *
+ * For executable objects that are unix processes there will be one
+ * thread_command (cmd == LC_UNIXTHREAD) created for it by the link-editor.
+ * This is the same as a LC_THREAD, except that a stack is automatically
+ * created (based on the shell's limit for the stack size). Command
+ * arguments and environment variables are copied onto that stack.
+ */
+ struct thread_command
+ {
+ /// LC_THREAD or LC_UNIXTHREAD.
+ uint cmd;
+
+ /// Total size of this command.
+ uint cmdsize;
+ }
+
+ /**
+ * The routines command contains the address of the dynamic shared library
+ * initialization routine and an index into the module table for the module
+ * that defines the routine. Before any modules are used from the library
+ * the dynamic linker fully binds the module that defines the initialization
+ * routine and then calls it. This gets called before any module
+ * initialization routines (used for C++ static constructors) in the library.
+ */
+ struct routines_command
+ {
+ /// LC_ROUTINES.
+ uint cmd;
+
+ /// Total size of this command.
+ uint cmdsize;
+
+ /// Address of initialization routine.
+ uint init_address;
+
+ /// Index into the module table that.
+ uint init_module;
+
+ // the init routine is defined in
+
+ ///
+ uint reserved1;
+
+ ///
+ uint reserved2;
+
+ ///
+ uint reserved3;
+
+ ///
+ uint reserved4;
+
+ ///
+ uint reserved5;
+
+ ///
+ uint reserved6;
+ }
+
+ /// The 64-bit routines command. Same use as above.
+ struct routines_command_64
+ {
+ /// LC_ROUTINES_64.
+ uint cmd;
+
+ /// Total size of this command.
+ uint cmdsize;
+
+ /// Address of initialization routine.
+ ulong init_address;
+
+ /// Index into the module table that.
+ ulong init_module;
+
+ /* the init routine is defined in */
+
+ ///
+ ulong reserved1;
+
+ ///
+ ulong reserved2;
+
+ ///
+ ulong reserved3;
+
+ ///
+ ulong reserved4;
+
+ ///
+ ulong reserved5;
+
+ ///
+ ulong reserved6;
+ }
+
+ /**
+ * The symtab_command contains the offsets and sizes of the link-edit 4.3BSD
+ * "stab" style symbol table information as described in the header files
+ * <nlist.h> and <stab.h>.
+ */
+ struct symtab_command
+ {
+ /// LC_SYMTAB.
+ uint cmd;
+
+ /// Sizeof(struct symtab_command).
+ uint cmdsize;
+
+ /// Symbol table offset.
+ uint symoff;
+
+ /// Number of symbol table entries.
+ uint nsyms;
+
+ /// String table offset.
+ uint stroff;
+
+ /// String table size in bytes.
+ uint strsize;
+ }
+
+ /**
+ * This is the second set of the symbolic information which is used to
+ * support the data structures for the dynamically link editor.
+ *
+ * The original set of symbolic information in the symtab_command which contains
+ * the symbol and string tables must also be present when this load command is
+ * present. When this load command is present the symbol table is organized
+ * into three groups of symbols:
+ * * local symbols (static and debugging symbols) - grouped by module
+ * * defined external symbols - grouped by module (sorted by name if not lib)
+ * * undefined external symbols (sorted by name if MH_BINDATLOAD is not set,
+ * and in order the were seen by the static
+ * linker if MH_BINDATLOAD is set)
+ *
+ * In this load command there are offsets and counts to each of the three
+ * groups of symbols.
+ *
+ * This load command contains a the offsets and sizes of the following new
+ * symbolic information tables:
+ * * table of contents
+ * * module table
+ * * reference symbol table
+ * * indirect symbol table
+ *
+ * The first three tables above (the table of contents, module table and
+ * reference symbol table) are only present if the file is a dynamically
+ * linked shared library. For executable and object modules, which are files
+ * containing only one module, the information that would be in these three
+ * tables is determined as follows:
+ * * table of contents - the defined external symbols are sorted by name
+ * * module table - the file contains only one module so everything in the
+ * file is part of the module.
+ * * reference symbol table - is the defined and undefined external symbols
+ *
+ * For dynamically linked shared library files this load command also
+ * contains offsets and sizes to the pool of relocation entries for all
+ * sections separated into two groups:
+ * * external relocation entries
+ * * local relocation entries
+ *
+ * For executable and object modules the relocation entries continue to hang
+ * off the section structures.
+ */
+ struct dysymtab_command
+ {
+ /// LC_DYSYMTAB.
+ uint cmd;
+
+ /// sizeof(struct dysymtab_command).
+ uint cmdsize;
+
+ /**
+ * Index to local symbols.
+ *
+ * The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
+ * are grouped into the following three groups:
+ * * local symbols (further grouped by the module they are from)
+ * * defined external symbols (further grouped by the module they are from)
+ * * undefined symbols
+ *
+ * The local symbols are used only for debugging. The dynamic binding
+ * process may have to use them to indicate to the debugger the local
+ * symbols for a module that is being bound.
+ *
+ * The last two groups are used by the dynamic binding process to do the
+ * binding (indirectly through the module table and the reference symbol
+ * table when this is a dynamically linked shared library file).
+ */
+ uint ilocalsym;
+
+ /// Number of local symbols.
+ uint nlocalsym;
+
+
+
+ /// Index to externally defined symbols.
+ uint iextdefsym;
+
+ /// Number of externally defined symbols.
+ uint nextdefsym;
+
+
+
+ /// Index to undefined symbols.
+ uint iundefsym;
+
+ /// Number of undefined symbols.
+ uint nundefsym;
+
+ /**
+ * File offset to table of contents.
+ *
+ * For the for the dynamic binding process to find which module a symbol
+ * is defined in the table of contents is used (analogous to the ranlib
+ * structure in an archive) which maps defined external symbols to
+ * modules they are defined in. This exists only in a dynamically linked
+ * shared library file. For executable and object modules the defined
+ * external symbols are sorted by name and is use as the table of
+ * contents.
+ */
+ uint tocoff;
+
+ /// Number of entries in table of contents.
+ uint ntoc;
+
+ /**
+ * File offset to module table.
+ *
+ * To support dynamic binding of "modules" (whole object files) the
+ * symbol table must reflect the modules that the file was created from.
+ * This is done by having a module table that has indexes and counts
+ * into the merged tables for each module. The module structure that
+ * these two entries refer to is described below. This exists only in a
+ * dynamically linked shared library file. For executable and object
+ * modules the file only contains one module so everything in the file
+ * belongs to the module.
+ */
+ uint modtaboff;
+
+ /// Number of module table entries.
+ uint nmodtab;
+
+ /**
+ * Offset to referenced symbol table.
+ *
+ * To support dynamic module binding the module structure for each
+ * module indicates the external references (defined and undefined) each
+ * module makes. For each module there is an offset and a count into the
+ * reference symbol table for the symbols that the module references.
+ * This exists only in a dynamically linked shared library file. For
+ * executable and object modules the defined external symbols and the
+ * undefined external symbols indicates the external references.
+ */
+ uint extrefsymoff;
+
+ /// Number of referenced symbol table entries.
+ uint nextrefsyms;
+
+ /**
+ * File offset to the indirect symbol table.
+ *
+ * The sections that contain "symbol pointers" and "routine stubs" have
+ * indexes and (implied counts based on the size of the section and
+ * fixed size of the entry) into the "indirect symbol" table for each
+ * pointer and stub. For every section of these two types the index into
+ * the indirect symbol table is stored in the section header in the
+ * field reserved1. An indirect symbol table entry is simply a 32bit
+ * index into the symbol table to the symbol that the pointer or stub is
+ * referring to. The indirect symbol table is ordered to match the
+ * entries in the section.
+ */
+ uint indirectsymoff;
+
+ /// Number of indirect symbol table entries.
+ uint nindirectsyms;
+
+ /**
+ * Offset to external relocation entries-
+ *
+ * To support relocating an individual module in a library file quickly
+ * the external relocation entries for each module in the library need
+ * to be accessed efficiently. Since the relocation entries can't be
+ * accessed through the section headers for a library file they are
+ * separated into groups of local and external entries further grouped
+ * by module. In this case the presents of this load command who's
+ * extreloff, nextrel, locreloff and nlocrel fields are non-zero
+ * indicates that the relocation entries of non-merged sections are not
+ * referenced through the section structures (and the reloff and nreloc
+ * fields in the section headers are set to zero).
+ *
+ * Since the relocation entries are not accessed through the section
+ * headers this requires the r_address field to be something other than
+ * a section offset to identify the item to be relocated. In this case
+ * r_address is set to the offset from the vmaddr of the first
+ * LC_SEGMENT command. For MH_SPLIT_SEGS images r_address is set to the
+ * offset from thevmaddr of the first read-write LC_SEGMENT command.
+ *
+ * The relocation entries are grouped by module and the module table
+ * entries have indexes and counts into them for the group of external
+ * relocation entries for that the module.
+ *
+ * For sections that are merged across modules there must not be any
+ * remaining external relocation entries for them (for merged sections
+ * remaining relocation entries must be local).
+ */
+ uint extreloff;
+
+ /// Number of external relocation entries.
+ uint nextrel;
+
+ /**
+ * Offset to local relocation entries.
+ *
+ * All the local relocation entries are grouped together (they are not
+ * grouped by their module since they are only used if the object is
+ * moved from it statically link edited address).
+ */
+ uint locreloff;
+
+ /// Number of local relocation entries.
+ uint nlocrel;
+ }
+
+ /**
+ * An indirect symbol table entry is simply a 32bit index into the symbol
+ * table to the symbol that the pointer or stub is referring to. Unless it
+ * is for a non-lazy symbol pointer section for a defined symbol which
+ * strip(1) as removed. In which case it has the value
+ * INDIRECT_SYMBOL_LOCAL. If the symbol was also absolute
+ * INDIRECT_SYMBOL_ABS is or'ed with that.
+ */
+ enum
+ {
+ ///
+ INDIRECT_SYMBOL_LOCAL,
+
+ ///
+ INDIRECT_SYMBOL_ABS
+ }
+
+ /// A table of contents entry.
+ struct dylib_table_of_contents
+ {
+ /// The defined external symbol (index into the symbol table).
+ uint symbol_index;
+
+ /// Index into the module table this symbol is defined in.
+ uint module_index;
+ }
+
+ /// A module table entry.
+ struct dylib_module
+ {
+ /// The module name (index into string table).
+ uint module_name;
+
+
+
+ /// Index into externally defined symbols.
+ uint iextdefsym;
+
+ /// Number of externally defined symbols.
+ uint nextdefsym;
+
+ /// Index into reference symbol table.
+ uint irefsym;
+
+ /// Number of reference symbol table entries.
+ uint nrefsym;
+
+ /// Index into symbols for local symbols.
+ uint ilocalsym;
+
+ /// Number of local symbols.
+ uint nlocalsym;
+
+
+
+ /// Index into external relocation entries.
+ uint iextrel;
+
+ /// Number of external relocation entries.
+ uint nextrel;
+
+
+
+ /**
+ * Low 16 bits are the index into the init section, high 16 bits are the
+ * index into the term section.
+ */
+ uint iinit_iterm;
+
+ /**
+ * Low 16 bits are the number of init section entries, high 16 bits are
+ * the number of term section entries.
+ */
+ uint ninit_nterm;
+
+
+
+ /**
+ * The (__OBJC,__module_info) section.
+ *
+ * For this module address of the start of.
+ */
+ uint objc_module_info_addr;
+
+ /**
+ * The (__OBJC,__module_info) section.
+ *
+ * For this module size of.
+ */
+ uint objc_module_info_size;
+ }
+
+ /// A 64-bit module table entry.
+ struct dylib_module_64
+ {
+ /// The module name (index into string table).
+ uint module_name;
+
+
+
+ /// Index into externally defined symbols.
+ uint iextdefsym;
+
+ /// Number of externally defined symbols.
+ uint nextdefsym;
+
+ /// Index into reference symbol table.
+ uint irefsym;
+
+ /// Number of reference symbol table entries.
+ uint nrefsym;
+
+ /// Index into symbols for local symbols.
+ uint ilocalsym;
+
+ /// Number of local symbols.
+ uint nlocalsym;
+
+
+
+ /// Index into external relocation entries.
+ uint iextrel;
+
+ /// Number of external relocation entries.
+ uint nextrel;
+
+
+
+ /**
+ * Low 16 bits are the index into the init section, high 16 bits are the
+ * index into the term section.
+ */
+ uint iinit_iterm;
+
+ /**
+ * Low 16 bits are the number of init section entries, high 16 bits are
+ * the number of term section entries.
+ */
+ uint ninit_nterm;
+
+
+
+ /**
+ * The (__OBJC,__module_info) section.
+ *
+ * For this module size of.
+ */
+ uint objc_module_info_size;
+
+ /**
+ * The (__OBJC,__module_info) section.
+ *
+ * For this module address of the start of.
+ */
+ ulong objc_module_info_addr;
+ }
+
+ /**
+ * The entries in the reference symbol table are used when loading the
+ * module (both by the static and dynamic link editors) and if the module is
+ * unloaded or replaced. Therefore all external symbols
+ * (defined and undefined) are listed in the module's reference table. The
+ * flags describe the type of reference that is being made. The constants
+ * for the flags are defined in <mach-o/nlist.h> as they are also used for
+ * symbol table entries.
+ */
+ struct dylib_reference
+ {
+ /// Index into the symbol table.
+ @property uint isym() const pure nothrow @nogc @safe;
+
+ /// ditto
+ @property void isym(uint v) @safe pure nothrow @nogc;
+
+ /// Flags to indicate the type of reference.
+ @property uint flags() const pure nothrow @nogc @safe;
+
+ /// ditto
+ @property void flags(uint v) pure nothrow @nogc @safe;
+ }
+
+ /**
+ * The twolevel_hints_command contains the offset and number of hints in the
+ * two-level namespace lookup hints table.
+ */
+ struct twolevel_hints_command
+ {
+ /// LC_TWOLEVEL_HINTS.
+ uint cmd;
+
+ /// Sizeof(struct twolevel_hints_command).
+ uint cmdsize;
+
+ /// Offset to the hint table.
+ uint offset;
+
+ /// Number of hints in the hint table.
+ uint nhints;
+ }
+
+ /**
+ * The entries in the two-level namespace lookup hints table are
+ * twolevel_hint structs. These provide hints to the dynamic link editor
+ * where to start looking for an undefined symbol in a two-level namespace
+ * image. The isub_image field is an index into the sub-images
+ * (sub-frameworks and sub-umbrellas list) that made up the two-level image
+ * that the undefined symbol was found in when it was built by the static
+ * link editor. If isub-image is 0 the the symbol is expected to be defined
+ * in library and not in the sub-images. If isub-image is non-zero it is an
+ * index into the array of sub-images for the umbrella with the first index
+ * in the sub-images being 1. The array of sub-images is the ordered list of
+ * sub-images of the umbrella that would be searched for a symbol that has
+ * the umbrella recorded as its primary library. The table of contents index
+ * is an index into the library's table of contents. This is used as the
+ * starting point of the binary search or a directed linear search.
+ */
+ struct twolevel_hint
+ {
+ /// Index into the sub images.
+ @property uint isub_image() const pure nothrow @nogc @safe;
+
+ /// ditto
+ @property void isub_image(uint v) pure nothrow @nogc @safe;
+
+ /// Index into the table of contents.
+ @property uint itoc() const pure nothrow @nogc @safe;
+
+ /// ditto
+ @property void itoc(uint v) pure nothrow @nogc @safe;
+ }
+
+ /**
+ * The prebind_cksum_command contains the value of the original check sum
+ * for prebound files or zero. When a prebound file is first created or
+ * modified for other than updating its prebinding information the value of
+ * the check sum is set to zero. When the file has it prebinding re-done and
+ * if the value of the check sum is zero the original check sum is
+ * calculated and stored in cksum field of this load command in the output
+ * file. If when the prebinding is re-done and the cksum field is non-zero
+ * it is left unchanged from the input file.
+ */
+ struct prebind_cksum_command
+ {
+ /// LC_PREBIND_CKSUM.
+ uint cmd;
+
+ /// Sizeof(struct prebind_cksum_command).
+ uint cmdsize;
+
+ /// The check sum or zero.
+ uint cksum;
+ }
+
+ /**
+ * The uuid load command contains a single 128-bit unique random number that
+ * identifies an object produced by the static link editor.
+ */
+ struct uuid_command
+ {
+ /// LC_UUID.
+ uint cmd;
+
+ /// Sizeof(struct uuid_command).
+ uint cmdsize;
+
+ /// The 128-bit uuid.
+ ubyte[16] uuid;
+ }
+
+ /**
+ * The rpath_command contains a path which at runtime should be added to
+ * the current run path used to find @rpath prefixed dylibs.
+ */
+ struct rpath_command
+ {
+ /// LC_RPATH.
+ uint cmd;
+
+ /// Includes string.
+ uint cmdsize;
+
+ /// Path to add to run path.
+ lc_str path;
+ }
+
+ /**
+ * The linkedit_data_command contains the offsets and sizes of a blob
+ * of data in the __LINKEDIT segment.
+ */
+ struct linkedit_data_command
+ {
+ /**
+ * LC_CODE_SIGNATURE, LC_SEGMENT_SPLIT_INFO, LC_FUNCTION_STARTS,
+ * LC_DATA_IN_CODE, LC_DYLIB_CODE_SIGN_DRS,
+ * LC_LINKER_OPTIMIZATION_HINT, LC_DYLD_EXPORTS_TRIE or
+ * LC_DYLD_CHAINED_FIXUPS.
+ */
+ uint cmd;
+
+ /// Sizeof(struct linkedit_data_command).
+ uint cmdsize;
+
+ /// File offset of data in __LINKEDIT segment.
+ uint dataoff;
+
+ /// File size of data in __LINKEDIT segment.
+ uint datasize;
+
+ }
+
+ /**
+ * The encryption_info_command contains the file offset and size of an
+ * of an encrypted segment.
+ */
+ struct encryption_info_command
+ {
+ /// LC_ENCRYPTION_INFO.
+ uint cmd;
+
+ /// Sizeof(struct encryption_info_command).
+ uint cmdsize;
+
+ /// File offset of encrypted range.
+ uint cryptoff;
+
+ /// File size of encrypted range.
+ uint cryptsize;
+
+ /// Which encryption system, 0 means not-encrypted yet.
+ uint cryptid;
+ }
+
+ /**
+ * The encryption_info_command_64 contains the file offset and size of an
+ * of an encrypted segment (for use in x86_64 targets).
+ */
+ struct encryption_info_command_64
+ {
+ /// LC_ENCRYPTION_INFO_64.
+ uint cmd;
+
+ /// Sizeof(struct encryption_info_command_64).
+ uint cmdsize;
+
+ /// File offset of encrypted range.
+ uint cryptoff;
+
+ /// File size of encrypted range.
+ uint cryptsize;
+
+ /// Which encryption system, 0 means not-encrypted yet.
+ uint cryptid;
+
+ /// Padding to make this struct's size a multiple of 8 bytes.
+ uint pad;
+ }
+
+ /**
+ * The version_min_command contains the min OS version on which this
+ * binary was built to run.
+ */
+ struct version_min_command
+ {
+ /**
+ * LC_VERSION_MIN_MACOSX or LC_VERSION_MIN_IPHONEOS or
+ * LC_VERSION_MIN_WATCHOS or LC_VERSION_MIN_TVOS.
+ */
+ uint cmd;
+
+ /// Sizeof(struct min_version_command).
+ uint cmdsize;
+
+ /// X.Y.Z is encoded in nibbles xxxx.yy.zz.
+ uint version_;
+
+ /// X.Y.Z is encoded in nibbles xxxx.yy.zz.
+ uint sdk;
+ }
+
+ /**
+ * The build_version_command contains the min OS version on which this
+ * binary was built to run for its platform. The list of known platforms and
+ * tool values following it.
+ */
+ struct build_version_command
+ {
+ /// LC_BUILD_VERSION.
+ uint cmd;
+
+ /**
+ * Sizeof(struct build_version_command) plus ntools
+ * sizeof(struct build_tool_version).
+ */
+ uint cmdsize;
+
+ /// Platform.
+ uint platform;
+
+ /// X.Y.Z is encoded in nibbles xxxx.yy.zz.
+ uint minos;
+
+ /// X.Y.Z is encoded in nibbles xxxx.yy.zz.
+ uint sdk;
+
+ /// Number of tool entries following this.
+ uint ntools;
+
+ }
+
+ ///
+ struct build_tool_version
+ {
+ /// Enum for the tool.
+ uint tool;
+
+ /// Version number of the tool.
+ uint version_;
+ }
+
+ /// Known values for the platform field above.
+ enum
+ {
+ ///
+ PLATFORM_MACOS,
+
+ ///
+ PLATFORM_IOS,
+
+ ///
+ PLATFORM_TVOS,
+
+ ///
+ PLATFORM_WATCHOS,
+
+ ///
+ PLATFORM_BRIDGEOS,
+
+ ///
+ PLATFORM_UIKITFORMAC,
+
+ ///
+ PLATFORM_IOSSIMULATOR,
+
+ ///
+ PLATFORM_TVOSSIMULATOR,
+
+ ///
+ PLATFORM_WATCHOSSIMULATOR,
+
+ ///
+ PLATFORM_DRIVERKIT
+ }
+
+
+ /// Known values for the tool field above.
+ enum
+ {
+ ///
+ TOOL_CLANG,
+
+ ///
+ TOOL_SWIFT,
+
+ ///
+ TOOL_LD
+ }
+
+ /**
+ * The dyld_info_command contains the file offsets and sizes of
+ * the new compressed form of the information dyld needs to
+ * load the image. This information is used by dyld on Mac OS X
+ * 10.6 and later. All information pointed to by this command
+ * is encoded using byte streams, so no endian swapping is needed
+ * to interpret it.
+ */
+ struct dyld_info_command
+ {
+ /// LC_DYLD_INFO or LC_DYLD_INFO_ONLY.
+ uint cmd;
+
+ /// Sizeof(struct dyld_info_command).
+ uint cmdsize;
+
+
+
+ /**
+ * File offset to rebase info.
+ *
+ * Dyld rebases an image whenever dyld loads it at an address different
+ * from its preferred address. The rebase information is a stream
+ * of byte sized opcodes whose symbolic names start with REBASE_OPCODE_.
+ * Conceptually the rebase information is a table of tuples:
+ * <seg-index, seg-offset, type>
+ * The opcodes are a compressed way to encode the table by only
+ * encoding when a column changes. In addition simple patterns
+ * like "every n'th offset for m times" can be encoded in a few
+ * bytes.
+ */
+ uint rebase_off;
+
+ /// Size of rebase info.
+ uint rebase_size;
+
+
+
+ /**
+ * File offset to binding info.
+ *
+ * Dyld binds an image during the loading process, if the image
+ * requires any pointers to be initialized to symbols in other images.
+ * The bind information is a stream of byte sized
+ * opcodes whose symbolic names start with BIND_OPCODE_.
+ * Conceptually the bind information is a table of tuples:
+ * <seg-index, seg-offset, type, symbol-library-ordinal, symbol-name, addend>
+ * The opcodes are a compressed way to encode the table by only
+ * encoding when a column changes. In addition simple patterns
+ * like for runs of pointers initialzed to the same value can be
+ * encoded in a few bytes.
+ */
+ uint bind_off;
+
+ /// Size of binding info.
+ uint bind_size;
+
+
+
+ /**
+ * File offset to weak binding info.
+ *
+ * Some C++ programs require dyld to unique symbols so that all
+ * images in the process use the same copy of some code/data.
+ * This step is done after binding. The content of the weak_bind
+ * info is an opcode stream like the bind_info. But it is sorted
+ * alphabetically by symbol name. This enable dyld to walk
+ * all images with weak binding information in order and look
+ * for collisions. If there are no collisions, dyld does
+ * no updating. That means that some fixups are also encoded
+ * in the bind_info. For instance, all calls to "operator new"
+ * are first bound to libstdc++.dylib using the information
+ * in bind_info. Then if some image overrides operator new
+ * that is detected when the weak_bind information is processed
+ * and the call to operator new is then rebound.
+ */
+ uint weak_bind_off;
+
+ /// Size of weak binding info.
+ uint weak_bind_size;
+
+
+
+ /**
+ * File offset to lazy binding info.
+ *
+ * Some uses of external symbols do not need to be bound immediately.
+ * Instead they can be lazily bound on first use. The lazy_bind
+ * are contains a stream of BIND opcodes to bind all lazy symbols.
+ * Normal use is that dyld ignores the lazy_bind section when
+ * loading an image. Instead the static linker arranged for the
+ * lazy pointer to initially point to a helper function which
+ * pushes the offset into the lazy_bind area for the symbol
+ * needing to be bound, then jumps to dyld which simply adds
+ * the offset to lazy_bind_off to get the information on what
+ * to bind.
+ */
+ uint lazy_bind_off;
+
+ /// Size of lazy binding infs.
+ uint lazy_bind_size;
+
+
+
+ /**
+ * File offset to lazy binding info.
+ *
+ * The symbols exported by a dylib are encoded in a trie. This
+ * is a compact representation that factors out common prefixes.
+ * It also reduces LINKEDIT pages in RAM because it encodes all
+ * information (name, address, flags) in one small, contiguous range.
+ * The export area is a stream of nodes. The first node sequentially
+ * is the start node for the trie.
+ *
+ * Nodes for a symbol start with a uleb128 that is the length of
+ * the exported symbol information for the string so far.
+ * If there is no exported symbol, the node starts with a zero byte.
+ * If there is exported info, it follows the length.
+ *
+ * First is a uleb128 containing flags. Normally, it is followed by
+ * a uleb128 encoded offset which is location of the content named
+ * by the symbol from the mach_header for the image. If the flags
+ * is EXPORT_SYMBOL_FLAGS_REEXPORT, then following the flags is
+ * a uleb128 encoded library ordinal, then a zero terminated
+ * UTF8 string. If the string is zero length, then the symbol
+ * is re-export from the specified dylib with the same name.
+ * If the flags is EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER, then following
+ * the flags is two uleb128s: the stub offset and the resolver offset.
+ * The stub is used by non-lazy pointers. The resolver is used
+ * by lazy pointers and must be called to get the actual address to use.
+ *
+ * After the optional exported symbol information is a byte of
+ * how many edges (0-255) that this node has leaving it,
+ * followed by each edge.
+ * Each edge is a zero terminated UTF8 of the addition chars
+ * in the symbol, followed by a uleb128 offset for the node that
+ * edge points to.
+ *
+ */
+ uint export_off;
+
+ /// Size of lazy binding infs.
+ uint export_size;
+ }
+
+ /// The following are used to encode rebasing information.
+ enum
+ {
+ ///
+ REBASE_TYPE_POINTER,
+
+ ///
+ REBASE_TYPE_TEXT_ABSOLUTE32,
+
+ ///
+ REBASE_TYPE_TEXT_PCREL32,
+
+
+
+ ///
+ REBASE_OPCODE_MASK,
+
+ ///
+ REBASE_IMMEDIATE_MASK,
+
+ ///
+ REBASE_OPCODE_DONE,
+
+ ///
+ REBASE_OPCODE_SET_TYPE_IMM,
+
+ ///
+ REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB,
+
+ ///
+ REBASE_OPCODE_ADD_ADDR_ULEB,
+
+ ///
+ REBASE_OPCODE_ADD_ADDR_IMM_SCALED,
+
+ ///
+ REBASE_OPCODE_DO_REBASE_IMM_TIMES,
+
+ ///
+ REBASE_OPCODE_DO_REBASE_ULEB_TIMES,
+
+ ///
+ REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB,
+
+ ///
+ REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB
+ }
+
+
+ /// The following are used to encode binding information.
+ enum
+ {
+ ///
+ BIND_TYPE_POINTER,
+
+ ///
+ BIND_TYPE_TEXT_ABSOLUTE32,
+
+ ///
+ BIND_TYPE_TEXT_PCREL32,
+
+
+
+ ///
+ BIND_SPECIAL_DYLIB_SELF,
+
+ ///
+ BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE,
+
+ ///
+ BIND_SPECIAL_DYLIB_FLAT_LOOKUP,
+
+ ///
+ BIND_SPECIAL_DYLIB_WEAK_LOOKUP,
+
+
+
+ ///
+ BIND_SYMBOL_FLAGS_WEAK_IMPORT,
+
+ ///
+ BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION,
+
+
+
+ ///
+ BIND_OPCODE_MASK,
+
+ ///
+ BIND_IMMEDIATE_MASK,
+
+ ///
+ BIND_OPCODE_DONE,
+
+ ///
+ BIND_OPCODE_SET_DYLIB_ORDINAL_IMM,
+
+ ///
+ BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB,
+
+ ///
+ BIND_OPCODE_SET_DYLIB_SPECIAL_IMM,
+
+ ///
+ BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM,
+
+ ///
+ BIND_OPCODE_SET_TYPE_IMM,
+
+ ///
+ BIND_OPCODE_SET_ADDEND_SLEB,
+
+ ///
+ BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB,
+
+ ///
+ BIND_OPCODE_ADD_ADDR_ULEB,
+
+ ///
+ BIND_OPCODE_DO_BIND,
+
+ ///
+ BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB,
+
+ ///
+ BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED,
+
+ ///
+ BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB,
+
+ ///
+ BIND_OPCODE_THREADED,
+
+ ///
+ BIND_SUBOPCODE_THREADED_SET_BIND_ORDINAL_TABLE_SIZE_ULEB,
+
+ ///
+ BIND_SUBOPCODE_THREADED_APPLY
+ }
+
+ /**
+ * The following are used on the flags byte of a terminal node
+ * in the export information.
+ */
+ enum
+ {
+
+ ///
+ EXPORT_SYMBOL_FLAGS_KIND_MASK,
+
+ ///
+ EXPORT_SYMBOL_FLAGS_KIND_REGULAR,
+
+ ///
+ EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL,
+
+ ///
+ EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE,
+
+ ///
+ EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION,
+
+ ///
+ EXPORT_SYMBOL_FLAGS_REEXPORT,
+
+ ///
+ EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER,
+
+ }
+
+
+ /*
+ * The linker_option_command contains linker options embedded in object files.
+ */
+ struct linker_option_command
+ {
+ /// LC_LINKER_OPTION only used in MH_OBJECT filetypes.
+ uint cmd;
+
+ ///
+ uint cmdsize;
+
+ /**
+ * Number of strings concatenation of zero terminated UTF8 strings.
+ * Zero filled at end to align.
+ */
+ uint count;
+ }
+
+ /**
+ * The symseg_command contains the offset and size of the GNU style
+ * symbol table information as described in the header file <symseg.h>.
+ * The symbol roots of the symbol segments must also be aligned properly
+ * in the file. So the requirement of keeping the offsets aligned to a
+ * multiple of a 4 bytes translates to the length field of the symbol
+ * roots also being a multiple of a long. Also the padding must again be
+ * zeroed. (THIS IS OBSOLETE and no longer supported).
+ */
+ struct symseg_command
+ {
+ /// LC_SYMSEG.
+ uint cmd;
+
+ /// Sizeof(struct symseg_command).
+ uint cmdsize;
+
+ /// Symbol segment offset.
+ uint offset;
+
+ /// Symbol segment size in bytes.
+ uint size;
+ }
+
+ /**
+ * The ident_command contains a free format string table following the
+ * ident_command structure. The strings are null terminated and the size of
+ * the command is padded out with zero bytes to a multiple of 4 bytes/
+ * (THIS IS OBSOLETE and no longer supported).
+ */
+ struct ident_command
+ {
+ /// LC_IDENT.
+ uint cmd;
+
+ /// Strings that follow this command.
+ uint cmdsize;
+ }
+
+ /**
+ * The fvmfile_command contains a reference to a file to be loaded at the
+ * specified virtual address. (Presently, this command is reserved for
+ * internal use. The kernel ignores this command when loading a program into
+ * memory).
+ */
+ struct fvmfile_command
+ {
+ /// LC_FVMFILE.
+ uint cmd;
+
+ /// Includes pathname string.
+ uint cmdsize;
+
+ /// Files pathname.
+ lc_str name;
+
+ /// Files virtual address.
+ uint header_addr;
+ }
+
+ /**
+ * The entry_point_command is a replacement for thread_command.
+ * It is used for main executables to specify the location (file offset)
+ * of main(). If -stack_size was used at link time, the stacksize
+ * field will contain the stack size need for the main thread.
+ */
+ struct entry_point_command
+ {
+ /// LC_MAIN only used in MH_EXECUTE filetypes.
+ uint cmd;
+
+ /// 24.
+ uint cmdsize;
+
+ /// File (__TEXT) offset of main().
+ ulong entryoff;
+
+ /// If not zero, initial stack size.
+ ulong stacksize;
+ }
+
+ /**
+ * The source_version_command is an optional load command containing
+ * the version of the sources used to build the binary.
+ */
+ struct source_version_command
+ {
+ /// LC_SOURCE_VERSION.
+ uint cmd;
+
+ /// 16.
+ uint cmdsize;
+
+ /// A.B.C.D.E packed as a24.b10.c10.d10.e10.
+ ulong version_;
+ }
+
+ /**
+ * The LC_DATA_IN_CODE load commands uses a linkedit_data_command
+ * to point to an array of data_in_code_entry entries. Each entry
+ * describes a range of data in a code section.
+ */
+ struct data_in_code_entry
+ {
+ /// From mach_header to start of data range.
+ uint offset;
+
+ /// Number of bytes in data range.
+ ushort length;
+
+ /// A DICE_KIND_* value.
+ ushort kind;
+ }
+
+ ///
+ enum
+ {
+ ///
+ DICE_KIND_DATA,
+
+ ///
+ DICE_KIND_JUMP_TABLE8,
+
+ ///
+ DICE_KIND_JUMP_TABLE16,
+
+ ///
+ DICE_KIND_JUMP_TABLE32,
+
+ ///
+ DICE_KIND_ABS_JUMP_TABLE32
+ }
+
+ /**
+ * Sections of type S_THREAD_LOCAL_VARIABLES contain an array
+ * of tlv_descriptor structures.
+ */
+ struct tlv_descriptor
+ {
+ ///
+ void* function (tlv_descriptor*) thunk;
+
+ ///
+ c_ulong key;
+
+ ///
+ c_ulong offset;
+ }
+
+ /**
+ * LC_NOTE commands describe a region of arbitrary data included in a Mach-O
+ * file. Its initial use is to record extra data in MH_CORE files.
+ */
+ struct note_command
+ {
+ /// LC_NOTE.
+ uint cmd;
+
+ /// Sizeof(struct note_command).
+ uint cmdsize;
+
+ /// Owner name for this LC_NOTE.
+ char[16] data_owner;
+
+ /// File offset of this data.
+ ulong offset;
+
+ /// Length of data region.
+ ulong size;
+ }
+}
+
+else version (OSX)
+ version = Darwin;
+else version (iOS)
+ version = Darwin;
+else version (TVOS)
+ version = Darwin;
+else version (WatchOS)
+ version = Darwin;
+
+version (Darwin):
+extern (C):
+
+struct mach_header
+{
+ uint magic;
+ int cputype;
+ int cpusubtype;
+ uint filetype;
+ uint ncmds;
+ uint sizeofcmds;
+ uint flags;
+}
+
+enum
+{
+ MH_MAGIC = 0xfeedface,
+ MH_CIGAM = 0xcefaedfe
+}
+
+struct mach_header_64
+{
+ uint magic;
+ int cputype;
+ int cpusubtype;
+ uint filetype;
+ uint ncmds;
+ uint sizeofcmds;
+ uint flags;
+ uint reserved;
+}
+
+enum
+{
+ MH_MAGIC_64 = 0xfeedfacf,
+ MH_CIGAM_64 = 0xcffaedfe
+}
+
+enum
+{
+ MH_OBJECT = 0x1,
+ MH_EXECUTE = 0x2,
+ MH_FVMLIB = 0x3,
+ MH_CORE = 0x4,
+ MH_PRELOAD = 0x5,
+ MH_DYLIB = 0x6,
+ MH_DYLINKER = 0x7,
+ MH_BUNDLE = 0x8,
+ MH_DYLIB_STUB = 0x9,
+ MH_DSYM = 0xa,
+ MH_KEXT_BUNDLE = 0xb
+}
+
+enum
+{
+ MH_NOUNDEFS = 0x1,
+ MH_INCRLINK = 0x2,
+ MH_DYLDLINK = 0x4,
+ MH_BINDATLOAD = 0x8,
+ MH_PREBOUND = 0x10,
+ MH_SPLIT_SEGS = 0x20,
+ MH_LAZY_INIT = 0x40,
+ MH_TWOLEVEL = 0x80,
+ MH_FORCE_FLAT = 0x100,
+ MH_NOMULTIDEFS = 0x200,
+ MH_NOFIXPREBINDING = 0x400,
+ MH_PREBINDABLE = 0x800,
+ MH_ALLMODSBOUND = 0x1000,
+ MH_SUBSECTIONS_VIA_SYMBOLS = 0x2000,
+ MH_CANONICAL = 0x4000,
+ MH_WEAK_DEFINES = 0x8000,
+ MH_BINDS_TO_WEAK = 0x10000,
+
+ MH_ALLOW_STACK_EXECUTION = 0x20000,
+ MH_ROOT_SAFE = 0x40000,
+
+ MH_SETUID_SAFE = 0x80000,
+ MH_NO_REEXPORTED_DYLIBS = 0x100000,
+ MH_PIE = 0x200000,
+ MH_DEAD_STRIPPABLE_DYLIB = 0x400000,
+ MH_HAS_TLV_DESCRIPTORS = 0x800000,
+
+ MH_NO_HEAP_EXECUTION = 0x1000000,
+
+ MH_APP_EXTENSION_SAFE = 0x02000000,
+
+ MH_NLIST_OUTOFSYNC_WITH_DYLDINFO = 0x04000000,
+
+ MH_SIM_SUPPORT = 0x08000000,
+
+ MH_DYLIB_IN_CACHE = 0x80000000
+}
+
+struct load_command
+{
+ uint cmd;
+ uint cmdsize;
+}
+
+enum LC_REQ_DYLD = 0x80000000;
+
+enum
+{
+ LC_SEGMENT = 0x1,
+ LC_SYMTAB = 0x2,
+ LC_SYMSEG = 0x3,
+ LC_THREAD = 0x4,
+ LC_UNIXTHREAD = 0x5,
+ LC_LOADFVMLIB = 0x6,
+ LC_IDFVMLIB = 0x7,
+ LC_IDENT = 0x8,
+ LC_FVMFILE = 0x9,
+ LC_PREPAGE = 0xa,
+ LC_DYSYMTAB = 0xb,
+ LC_LOAD_DYLIB = 0xc,
+ LC_ID_DYLIB = 0xd,
+ LC_LOAD_DYLINKER = 0xe,
+ LC_ID_DYLINKER = 0xf,
+ LC_PREBOUND_DYLIB = 0x10,
+ LC_ROUTINES = 0x11,
+ LC_SUB_FRAMEWORK = 0x12,
+ LC_SUB_UMBRELLA = 0x13,
+ LC_SUB_CLIENT = 0x14,
+ LC_SUB_LIBRARY = 0x15,
+ LC_TWOLEVEL_HINTS = 0x16,
+ LC_PREBIND_CKSUM = 0x17
+}
+
+enum LC_LOAD_WEAK_DYLIB = 0x18 | LC_REQ_DYLD;
+
+enum
+{
+ LC_SEGMENT_64 = 0x19,
+ LC_ROUTINES_64 = 0x1a,
+ LC_UUID = 0x1b,
+ LC_RPATH = 0x1c | LC_REQ_DYLD,
+ LC_CODE_SIGNATURE = 0x1d,
+ LC_SEGMENT_SPLIT_INFO = 0x1e,
+ LC_REEXPORT_DYLIB = 0x1f | LC_REQ_DYLD,
+ LC_LAZY_LOAD_DYLIB = 0x20,
+ LC_ENCRYPTION_INFO = 0x21,
+ LC_DYLD_INFO = 0x22,
+ LC_DYLD_INFO_ONLY = 0x22 | LC_REQ_DYLD,
+ LC_LOAD_UPWARD_DYLIB = 0x23 | LC_REQ_DYLD,
+ LC_VERSION_MIN_MACOSX = 0x24,
+ LC_VERSION_MIN_IPHONEOS = 0x25,
+ LC_FUNCTION_STARTS = 0x26,
+ LC_DYLD_ENVIRONMENT = 0x27,
+ LC_MAIN = 0x28 | LC_REQ_DYLD,
+ LC_DATA_IN_CODE = 0x29,
+ LC_SOURCE_VERSION = 0x2A,
+ LC_DYLIB_CODE_SIGN_DRS = 0x2B,
+ LC_ENCRYPTION_INFO_64 = 0x2C,
+ LC_LINKER_OPTION = 0x2D,
+ LC_LINKER_OPTIMIZATION_HINT = 0x2E,
+ LC_VERSION_MIN_TVOS = 0x2F,
+ LC_VERSION_MIN_WATCHOS = 0x30,
+ LC_NOTE = 0x31,
+ LC_BUILD_VERSION = 0x32,
+ LC_DYLD_EXPORTS_TRIE = 0x33 | LC_REQ_DYLD,
+ LC_DYLD_CHAINED_FIXUPS = 0x34 | LC_REQ_DYLD
+}
+
+union lc_str
+{
+ uint offset;
+
+ version (D_LP64) {}
+ else
+ char* ptr;
+}
+
+struct segment_command
+{
+ uint cmd;
+ uint cmdsize;
+ char[16] segname = 0;
+ uint vmaddr;
+ uint vmsize;
+ uint fileoff;
+ uint filesize;
+ int maxprot;
+ int initprot;
+ uint nsects;
+ uint flags;
+}
+
+struct segment_command_64
+{
+ uint cmd;
+ uint cmdsize;
+ char[16] segname = 0;
+ ulong vmaddr;
+ ulong vmsize;
+ ulong fileoff;
+ ulong filesize;
+ int maxprot;
+ int initprot;
+ uint nsects;
+ uint flags;
+}
+
+enum
+{
+ SG_HIGHVM = 0x1,
+ SG_FVMLIB = 0x2,
+ SG_NORELOC = 0x4,
+ SG_PROTECTED_VERSION_1 = 0x8,
+ SG_READ_ONLY = 0x10
+}
+
+struct section
+{
+ char[16] sectname = 0;
+ char[16] segname = 0;
+ uint addr;
+ uint size;
+ uint offset;
+ uint align_;
+ uint reloff;
+ uint nreloc;
+ uint flags;
+ uint reserved1;
+ uint reserved2;
+}
+
+struct section_64
+{
+ char[16] sectname = 0;
+ char[16] segname = 0;
+ ulong addr;
+ ulong size;
+ uint offset;
+ uint align_;
+ uint reloff;
+ uint nreloc;
+ uint flags;
+ uint reserved1;
+ uint reserved2;
+ uint reserved3;
+}
+
+
+enum
+{
+ SECTION_TYPE = 0x000000ff,
+ SECTION_ATTRIBUTES = 0xffffff00
+}
+
+enum
+{
+ S_REGULAR = 0x0,
+ S_ZEROFILL = 0x1,
+ S_CSTRING_LITERALS = 0x2,
+ S_4BYTE_LITERALS = 0x3,
+ S_8BYTE_LITERALS = 0x4,
+ S_LITERAL_POINTERS = 0x5,
+ S_NON_LAZY_SYMBOL_POINTERS = 0x6,
+ S_LAZY_SYMBOL_POINTERS = 0x7,
+ S_SYMBOL_STUBS = 0x8,
+ S_MOD_INIT_FUNC_POINTERS = 0x9,
+ S_MOD_TERM_FUNC_POINTERS = 0xa,
+ S_COALESCED = 0xb,
+ S_GB_ZEROFILL = 0xc,
+ S_INTERPOSING = 0xd,
+ S_16BYTE_LITERALS = 0xe,
+ S_DTRACE_DOF = 0xf,
+ S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10,
+
+ S_THREAD_LOCAL_REGULAR = 0x11,
+ S_THREAD_LOCAL_ZEROFILL = 0x12,
+ S_THREAD_LOCAL_VARIABLES = 0x13,
+ S_THREAD_LOCAL_VARIABLE_POINTERS = 0x14,
+ S_THREAD_LOCAL_INIT_FUNCTION_POINTERS = 0x15,
+ S_INIT_FUNC_OFFSETS = 0x16
+}
+
+enum
+{
+ SECTION_ATTRIBUTES_USR = 0xff000000,
+ S_ATTR_PURE_INSTRUCTIONS = 0x80000000,
+ S_ATTR_NO_TOC = 0x40000000,
+ S_ATTR_STRIP_STATIC_SYMS = 0x20000000,
+ S_ATTR_NO_DEAD_STRIP = 0x10000000,
+ S_ATTR_LIVE_SUPPORT = 0x08000000,
+ S_ATTR_SELF_MODIFYING_CODE = 0x04000000,
+ S_ATTR_DEBUG = 0x02000000,
+ SECTION_ATTRIBUTES_SYS = 0x00ffff00,
+ S_ATTR_SOME_INSTRUCTIONS = 0x00000400,
+ S_ATTR_EXT_RELOC = 0x00000200,
+ S_ATTR_LOC_RELOC = 0x00000100
+}
+
+enum
+{
+ SEG_PAGEZERO = "__PAGEZERO",
+
+ SEG_TEXT = "__TEXT",
+ SECT_TEXT = "__text",
+ SECT_FVMLIB_INIT0 = "__fvmlib_init0",
+ SECT_FVMLIB_INIT1 = "__fvmlib_init1",
+
+ SEG_DATA = "__DATA",
+ SECT_DATA = "__data",
+ SECT_BSS = "__bss",
+ SECT_COMMON = "__common",
+
+ SEG_OBJC = "__OBJC",
+ SECT_OBJC_SYMBOLS = "__symbol_table",
+ SECT_OBJC_MODULES = "__module_info",
+ SECT_OBJC_STRINGS = "__selector_strs",
+ SECT_OBJC_REFS = "__selector_refs",
+
+ SEG_ICON = "__ICON",
+ SECT_ICON_HEADER = "__header",
+ SECT_ICON_TIFF = "__tiff",
+
+ SEG_LINKEDIT = "__LINKEDIT",
+
+ SEG_UNIXSTACK = "__UNIXSTACK",
+
+ SEG_IMPORT = "__IMPORT"
+}
+
+struct fvmlib
+{
+ lc_str name;
+ uint minor_version;
+ uint header_addr;
+}
+
+struct fvmlib_command
+{
+ uint cmd;
+ uint cmdsize;
+ fvmlib fvmlib_;
+}
+
+struct dylib
+{
+ lc_str name;
+ uint timestamp;
+ uint current_version;
+ uint compatibility_version;
+}
+
+struct dylib_command
+{
+ uint cmd;
+ uint cmdsize;
+ dylib dylib_;
+}
+
+struct sub_framework_command
+{
+ uint cmd;
+ uint cmdsize;
+ lc_str umbrella;
+}
+
+struct sub_client_command
+{
+ uint cmd;
+ uint cmdsize;
+ lc_str client;
+}
+
+struct sub_umbrella_command
+{
+ uint cmd;
+ uint cmdsize;
+ lc_str sub_umbrella;
+}
+
+struct sub_library_command
+{
+ uint cmd;
+ uint cmdsize;
+ lc_str sub_library;
+}
+
+struct prebound_dylib_command
+{
+ uint cmd;
+ uint cmdsize;
+ lc_str name;
+ uint nmodules;
+ lc_str linked_modules;
+}
+
+struct dylinker_command
+{
+ uint cmd;
+ uint cmdsize;
+ lc_str name;
+}
+
+struct thread_command
+{
+ uint cmd;
+ uint cmdsize;
+}
+
+struct routines_command
+{
+ uint cmd;
+ uint cmdsize;
+ uint init_address;
+ uint init_module;
+ uint reserved1;
+ uint reserved2;
+ uint reserved3;
+ uint reserved4;
+ uint reserved5;
+ uint reserved6;
+}
+
+struct routines_command_64
+{
+ uint cmd;
+ uint cmdsize;
+ ulong init_address;
+ ulong init_module;
+ ulong reserved1;
+ ulong reserved2;
+ ulong reserved3;
+ ulong reserved4;
+ ulong reserved5;
+ ulong reserved6;
+}
+
+struct symtab_command
+{
+ uint cmd;
+ uint cmdsize;
+ uint symoff;
+ uint nsyms;
+ uint stroff;
+ uint strsize;
+}
+
+struct dysymtab_command
+{
+ uint cmd;
+ uint cmdsize;
+
+ uint ilocalsym;
+ uint nlocalsym;
+
+ uint iextdefsym;
+ uint nextdefsym;
+
+ uint iundefsym;
+ uint nundefsym;
+
+ uint tocoff;
+ uint ntoc;
+
+ uint modtaboff;
+ uint nmodtab;
+
+ uint extrefsymoff;
+ uint nextrefsyms;
+
+ uint indirectsymoff;
+ uint nindirectsyms;
+
+ uint extreloff;
+ uint nextrel;
+
+ uint locreloff;
+ uint nlocrel;
+}
+
+enum
+{
+ INDIRECT_SYMBOL_LOCAL = 0x80000000,
+ INDIRECT_SYMBOL_ABS = 0x40000000
+}
+
+struct dylib_table_of_contents
+{
+ uint symbol_index;
+ uint module_index;
+}
+
+struct dylib_module
+{
+ uint module_name;
+
+ uint iextdefsym;
+ uint nextdefsym;
+ uint irefsym;
+ uint nrefsym;
+ uint ilocalsym;
+ uint nlocalsym;
+
+ uint iextrel;
+ uint nextrel;
+
+ uint iinit_iterm;
+ uint ninit_nterm;
+
+ uint objc_module_info_addr;
+ uint objc_module_info_size;
+}
+
+struct dylib_module_64
+{
+ uint module_name;
+
+ uint iextdefsym;
+ uint nextdefsym;
+ uint irefsym;
+ uint nrefsym;
+ uint ilocalsym;
+ uint nlocalsym;
+
+ uint iextrel;
+ uint nextrel;
+
+ uint iinit_iterm;
+ uint ninit_nterm;
+
+ uint objc_module_info_size;
+ ulong objc_module_info_addr;
+}
+
+struct dylib_reference
+{
+ private uint storage;
+
+ @property uint isym()() const pure nothrow @nogc @safe
+ {
+ return cast(uint) ((storage & 16777215U) >> 0U);
+ }
+
+ @property void isym()(uint v) @safe pure nothrow @nogc
+ in
+ {
+ assert(v >= 0U, "Value is smaller than the minimum value of bitfield 'isym'");
+ assert(v <= 16777215U, "Value is greater than the maximum value of bitfield 'isym'");
+ }
+ body
+ {
+ storage = cast(uint) ((storage & (-1 - cast(uint) 16777215U)) |
+ ((cast(uint) v << 0U) & 16777215U));
+ }
+
+ @property uint flags()() const pure nothrow @nogc @safe
+ {
+ return cast(uint) ((storage & 4278190080U) >> 24U);
+ }
+
+ @property void flags()(uint v) pure nothrow @nogc @safe
+ in
+ {
+ assert(v >= 0U, "Value is smaller than the minimum value of bitfield 'flags'");
+ assert(v <= 255U, "Value is greater than the maximum value of bitfield 'flags'");
+ }
+ body
+ {
+ storage = cast(uint) ((storage & (-1 - cast(uint) 4278190080U)) |
+ ((cast(uint) v << 24U) & 4278190080U));
+ }
+}
+
+struct twolevel_hints_command
+{
+ uint cmd;
+ uint cmdsize;
+ uint offset;
+ uint nhints;
+}
+
+struct twolevel_hint
+{
+ private uint storage;
+
+ @property uint isub_image()() const pure nothrow @nogc @safe
+ {
+ return cast(uint) ((storage & 255U) >>0U);
+ }
+
+ @property void isub_image()(uint v) pure nothrow @nogc @safe
+ in
+ {
+ assert(v >= 0U, "Value is smaller than the minimum value of bitfield 'isub_image'");
+ assert(v <= 255U, "Value is greater than the maximum value of bitfield 'isub_image'");
+ }
+ body
+ {
+ storage = cast(uint) ((storage & (-1-cast(uint)255U)) |
+ ((cast(uint) v << 0U) & 255U));
+ }
+
+ @property uint itoc()() const pure nothrow @nogc @safe
+ {
+ return cast(uint) ((storage & 4294967040U) >>8U);
+ }
+
+ @property void itoc()(uint v) pure nothrow @nogc @safe
+ in
+ {
+ assert(v >= 0U, "Value is smaller than the minimum value of bitfield 'itoc'");
+ assert(v <= 16777215U, "Value is greater than the maximum value of bitfield 'itoc'");
+ }
+ body
+ {
+ storage = cast(uint) ((storage & (-1-cast(uint)4294967040U)) |
+ ((cast(uint) v << 8U) & 4294967040U));
+ }
+}
+
+struct prebind_cksum_command
+{
+ uint cmd;
+ uint cmdsize;
+ uint cksum;
+}
+
+struct uuid_command
+{
+ uint cmd;
+ uint cmdsize;
+ ubyte[16] uuid;
+}
+
+struct rpath_command
+{
+ uint cmd;
+ uint cmdsize;
+ lc_str path;
+}
+
+struct linkedit_data_command
+{
+ uint cmd;
+ uint cmdsize;
+ uint dataoff;
+ uint datasize;
+}
+
+struct encryption_info_command
+{
+ uint cmd;
+ uint cmdsize;
+ uint cryptoff;
+ uint cryptsize;
+ uint cryptid;
+}
+
+struct encryption_info_command_64
+{
+ uint cmd;
+ uint cmdsize;
+ uint cryptoff;
+ uint cryptsize;
+ uint cryptid;
+ uint pad;
+}
+
+struct version_min_command
+{
+ uint cmd;
+ uint cmdsize;
+ uint version_;
+ uint sdk;
+}
+
+struct build_version_command
+{
+ uint cmd;
+ uint cmdsize;
+
+ uint platform;
+ uint minos;
+ uint sdk;
+ uint ntools;
+}
+
+struct build_tool_version
+{
+ uint tool;
+ uint version_;
+}
+
+enum
+{
+ PLATFORM_MACOS = 1,
+ PLATFORM_IOS = 2,
+ PLATFORM_TVOS = 3,
+ PLATFORM_WATCHOS = 4,
+ PLATFORM_BRIDGEOS = 5,
+ PLATFORM_UIKITFORMAC = 6,
+ PLATFORM_IOSSIMULATOR = 7,
+ PLATFORM_TVOSSIMULATOR = 8,
+ PLATFORM_WATCHOSSIMULATOR = 9,
+ PLATFORM_DRIVERKIT = 10
+}
+
+enum
+{
+ TOOL_CLANG = 1,
+ TOOL_SWIFT = 2,
+ TOOL_LD = 3
+}
+
+struct dyld_info_command
+{
+ uint cmd;
+ uint cmdsize;
+
+ uint rebase_off;
+ uint rebase_size;
+
+ uint bind_off;
+ uint bind_size;
+
+ uint weak_bind_off;
+ uint weak_bind_size;
+
+ uint lazy_bind_off;
+ uint lazy_bind_size;
+
+ uint export_off;
+ uint export_size;
+}
+
+enum
+{
+ REBASE_TYPE_POINTER = 1,
+ REBASE_TYPE_TEXT_ABSOLUTE32 = 2,
+ REBASE_TYPE_TEXT_PCREL32 = 3,
+
+ REBASE_OPCODE_MASK = 0xF0,
+ REBASE_IMMEDIATE_MASK = 0x0F,
+ REBASE_OPCODE_DONE = 0x00,
+ REBASE_OPCODE_SET_TYPE_IMM = 0x10,
+ REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB = 0x20,
+ REBASE_OPCODE_ADD_ADDR_ULEB = 0x30,
+ REBASE_OPCODE_ADD_ADDR_IMM_SCALED = 0x40,
+ REBASE_OPCODE_DO_REBASE_IMM_TIMES = 0x50,
+ REBASE_OPCODE_DO_REBASE_ULEB_TIMES = 0x60,
+ REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB = 0x70,
+ REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB = 0x80
+}
+
+enum
+{
+ BIND_TYPE_POINTER = 1,
+ BIND_TYPE_TEXT_ABSOLUTE32 = 2,
+ BIND_TYPE_TEXT_PCREL32 = 3,
+
+ BIND_SPECIAL_DYLIB_SELF = 0,
+ BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE = -1,
+ BIND_SPECIAL_DYLIB_FLAT_LOOKUP = -2,
+ BIND_SPECIAL_DYLIB_WEAK_LOOKUP = -3,
+
+ BIND_SYMBOL_FLAGS_WEAK_IMPORT = 0x1,
+ BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION = 0x8,
+
+ BIND_OPCODE_MASK = 0xF0,
+ BIND_IMMEDIATE_MASK = 0x0F,
+ BIND_OPCODE_DONE = 0x00,
+ BIND_OPCODE_SET_DYLIB_ORDINAL_IMM = 0x10,
+ BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB = 0x20,
+ BIND_OPCODE_SET_DYLIB_SPECIAL_IMM = 0x30,
+ BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM = 0x40,
+ BIND_OPCODE_SET_TYPE_IMM = 0x50,
+ BIND_OPCODE_SET_ADDEND_SLEB = 0x60,
+ BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB = 0x70,
+ BIND_OPCODE_ADD_ADDR_ULEB = 0x80,
+ BIND_OPCODE_DO_BIND = 0x90,
+ BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB = 0xA0,
+ BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED = 0xB0,
+ BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB = 0xC0,
+ BIND_OPCODE_THREADED = 0xD0,
+ BIND_SUBOPCODE_THREADED_SET_BIND_ORDINAL_TABLE_SIZE_ULEB = 0x00,
+ BIND_SUBOPCODE_THREADED_APPLY = 0x01
+}
+
+enum
+{
+ EXPORT_SYMBOL_FLAGS_KIND_MASK = 0x03,
+ EXPORT_SYMBOL_FLAGS_KIND_REGULAR = 0x00,
+ EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL = 0x01,
+ EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE = 0x02,
+ EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION = 0x04,
+ EXPORT_SYMBOL_FLAGS_REEXPORT = 0x08,
+ EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER = 0x10
+}
+
+struct linker_option_command
+{
+ uint cmd;
+ uint cmdsize;
+ uint count;
+}
+
+struct symseg_command
+{
+ uint cmd;
+ uint cmdsize;
+ uint offset;
+ uint size;
+}
+
+struct ident_command
+{
+ uint cmd;
+ uint cmdsize;
+}
+
+struct fvmfile_command
+{
+ uint cmd;
+ uint cmdsize;
+ lc_str name;
+ uint header_addr;
+}
+
+struct entry_point_command
+{
+ uint cmd;
+ uint cmdsize;
+ ulong entryoff;
+ ulong stacksize;
+}
+
+struct source_version_command
+{
+ uint cmd;
+ uint cmdsize;
+ ulong version_;
+}
+
+struct data_in_code_entry
+{
+ uint offset;
+ ushort length;
+ ushort kind;
+}
+
+enum
+{
+ DICE_KIND_DATA = 0x0001,
+ DICE_KIND_JUMP_TABLE8 = 0x0002,
+ DICE_KIND_JUMP_TABLE16 = 0x0003,
+ DICE_KIND_JUMP_TABLE32 = 0x0004,
+ DICE_KIND_ABS_JUMP_TABLE32 = 0x0005,
+}
+
+struct tlv_descriptor
+{
+ void* function(tlv_descriptor*) thunk;
+ c_ulong key;
+ c_ulong offset;
+}
+
+struct note_command
+{
+ uint cmd;
+ uint cmdsize;
+ char[16] data_owner = 0;
+ ulong offset;
+ ulong size;
+}
projects / thirdparty / gcc.git / commitdiff
