1 /*
2  * Copyright (c) 1999-2010 Apple Inc.  All Rights Reserved.
3  *
4  * @APPLE_LICENSE_HEADER_START@
5  * 
6  * This file contains Original Code and/or Modifications of Original Code
7  * as defined in and that are subject to the Apple Public Source License
8  * Version 2.0 (the 'License'). You may not use this file except in
9  * compliance with the License. Please obtain a copy of the License at
10  * http://www.opensource.apple.com/apsl/ and read it before using this
11  * file.
12  * 
13  * The Original Code and all software distributed under the License are
14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18  * Please see the License for the specific language governing rights and
19  * limitations under the License.
20  * 
21  * @APPLE_LICENSE_HEADER_END@
22  */
23 
24 
25 #ifndef __MACH_H
26 #define __MACH_H
27 
28 #define MH_OBJECT       0x1
29 #define MH_EXECUTE      0x2 
30 #define MH_FVMLIB       0x3 
31 #define MH_CORE         0x4 
32 #define MH_PRELOAD      0x5 
33 #define MH_DYLIB        0x6 
34 #define MH_DYLINKER     0x7 
35 #define MH_BUNDLE       0x8 
36 #define MH_DYLIB_STUB   0x9 
37 #define MH_NOUNDEFS     0x1 
38 #define MH_INCRLINK     0x2 
39 #define MH_DYLDLINK     0x4 
40 #define MH_BINDATLOAD   0x8 
41 #define MH_PREBOUND     0x10
42 #define MH_SPLIT_SEGS   0x20
43 #define MH_LAZY_INIT    0x40
44 #define MH_TWOLEVEL     0x80
45 #define MH_FORCE_FLAT   0x100           
46 #define MH_NOMULTIDEFS  0x200           
47 #define MH_NOFIXPREBINDING 0x400        
48 #define MH_PREBINDABLE  0x800           
49 #define MH_ALLMODSBOUND 0x1000          
50 #define MH_SUBSECTIONS_VIA_SYMBOLS 0x2000
51 #define MH_CANONICAL    0x4000
52 #define MH_WEAK_DEFINES 0x8000
53 #define MH_BINDS_TO_WEAK 0x10000
54 #define MH_ALLOW_STACK_EXECUTION 0x20000
55 
56 #define LC_REQ_DYLD 0x80000000
57 
58 #define LC_SEGMENT      0x1
59 #define LC_SYMTAB       0x2
60 #define LC_SYMSEG       0x3
61 #define LC_THREAD       0x4
62 #define LC_UNIXTHREAD   0x5
63 #define LC_LOADFVMLIB   0x6
64 #define LC_IDFVMLIB     0x7
65 #define LC_IDENT        0x8
66 #define LC_FVMFILE      0x9
67 #define LC_PREPAGE      0xa
68 #define LC_DYSYMTAB     0xb
69 #define LC_LOAD_DYLIB   0xc
70 #define LC_ID_DYLIB     0xd
71 #define LC_LOAD_DYLINKER 0xe
72 #define LC_ID_DYLINKER  0xf
73 #define LC_PREBOUND_DYLIB 0x10
74 #define LC_ROUTINES     0x11   
75 #define LC_SUB_FRAMEWORK 0x12  
76 #define LC_SUB_UMBRELLA 0x13   
77 #define LC_SUB_CLIENT   0x14   
78 #define LC_SUB_LIBRARY  0x15   
79 #define LC_TWOLEVEL_HINTS 0x16 
80 #define LC_PREBIND_CKSUM  0x17 
81 
82 #define LC_LOAD_WEAK_DYLIB (0x18 | LC_REQ_DYLD)
83 
84 #define SG_HIGHVM       0x1
85 #define SG_FVMLIB       0x2
86 #define SG_NORELOC      0x4
87 #define SG_PROTECTED_VERSION_1  0x8
88 
89 #define SECTION_TYPE             0x000000ff
90 #define SECTION_ATTRIBUTES       0xffffff00
91 
92 #define S_REGULAR               0x0
93 #define S_ZEROFILL              0x1
94 #define S_CSTRING_LITERALS      0x2
95 #define S_4BYTE_LITERALS        0x3
96 #define S_8BYTE_LITERALS        0x4
97 #define S_LITERAL_POINTERS      0x5
98 
99 #define S_NON_LAZY_SYMBOL_POINTERS      0x6
100 #define S_LAZY_SYMBOL_POINTERS          0x7
101 #define S_SYMBOL_STUBS                  0x8
102 #define S_MOD_INIT_FUNC_POINTERS        0x9
103 #define S_MOD_TERM_FUNC_POINTERS        0xa
104 #define S_COALESCED                     0xb
105 #define S_GB_ZEROFILL                   0xc
106 #define S_INTERPOSING                   0xd
107 
108 #define SECTION_ATTRIBUTES_USR   0xff000000
109 #define S_ATTR_PURE_INSTRUCTIONS 0x80000000
110 #define S_ATTR_NO_TOC            0x40000000
111 #define S_ATTR_STRIP_STATIC_SYMS 0x20000000
112 #define S_ATTR_NO_DEAD_STRIP     0x10000000
113 #define S_ATTR_LIVE_SUPPORT      0x08000000
114 #define S_ATTR_SELF_MODIFYING_CODE 0x04000000
115 #define SECTION_ATTRIBUTES_SYS   0x00ffff00
116 #define S_ATTR_SOME_INSTRUCTIONS 0x00000400
117 #define S_ATTR_EXT_RELOC         0x00000200
118 #define S_ATTR_LOC_RELOC         0x00000100                                           
119 
120 #define SEG_PAGEZERO    "__PAGEZERO"
121 #define SEG_TEXT        "__TEXT"
122 #define SECT_TEXT       "__text"
123 #define SECT_FVMLIB_INIT0 "__fvmlib_init0"
124 #define SECT_FVMLIB_INIT1 "__fvmlib_init1"
125 #define SEG_DATA        "__DATA"
126 #define SECT_DATA       "__data"
127 #define SECT_BSS        "__bss"
128 #define SECT_COMMON     "__common"
129 #define SEG_OBJC        "__OBJC"
130 #define SECT_OBJC_SYMBOLS "__symbol_table"
131 #define SECT_OBJC_MODULES "__module_info"
132 #define SECT_OBJC_STRINGS "__selector_strs"
133 #define SECT_OBJC_REFS "__selector_refs"
134 #define SEG_ICON         "__ICON"
135 #define SECT_ICON_HEADER "__header"
136 #define SECT_ICON_TIFF   "__tiff"
137 #define SEG_LINKEDIT    "__LINKEDIT"
138 #define SEG_UNIXSTACK   "__UNIXSTACK"
139 #define SEG_IMPORT      "__IMPORT"
140 
141 /*
142  * Capability bits used in the definition of cpu_type.
143  */
144 #define CPU_ARCH_MASK   0xff000000              /* mask for architecture bits */
145 #define CPU_ARCH_ABI64  0x01000000              /* 64 bit ABI */
146 
147 #define CPU_TYPE_ANY		((cpu_type_t) -1)
148 
149 #define CPU_TYPE_VAX		((cpu_type_t) 1)
150 /* skip				((cpu_type_t) 2)	*/
151 /* skip				((cpu_type_t) 3)	*/
152 /* skip				((cpu_type_t) 4)	*/
153 /* skip				((cpu_type_t) 5)	*/
154 #define	CPU_TYPE_MC680x0	((cpu_type_t) 6)
155 #define CPU_TYPE_X86		((cpu_type_t) 7)
156 #define CPU_TYPE_I386		CPU_TYPE_X86		/* compatibility */
157 #define	CPU_TYPE_X86_64		(CPU_TYPE_X86 | CPU_ARCH_ABI64)
158 
159 /* skip CPU_TYPE_MIPS		((cpu_type_t) 8)	*/
160 /* skip 			((cpu_type_t) 9)	*/
161 #define CPU_TYPE_MC98000	((cpu_type_t) 10)
162 #define CPU_TYPE_HPPA           ((cpu_type_t) 11)
163 #define CPU_TYPE_ARM		((cpu_type_t) 12)
164 #define CPU_TYPE_MC88000	((cpu_type_t) 13)
165 #define CPU_TYPE_SPARC		((cpu_type_t) 14)
166 #define CPU_TYPE_I860		((cpu_type_t) 15)
167 /* skip	CPU_TYPE_ALPHA		((cpu_type_t) 16)	*/
168 /* skip				((cpu_type_t) 17)	*/
169 #define CPU_TYPE_POWERPC		((cpu_type_t) 18)
170 #define CPU_TYPE_POWERPC64		(CPU_TYPE_POWERPC | CPU_ARCH_ABI64)
171 
172 /*
173  *	Machine subtypes (these are defined here, instead of in a machine
174  *	dependent directory, so that any program can get all definitions
175  *	regardless of where is it compiled).
176  */
177 
178 /*
179  * Capability bits used in the definition of cpu_subtype.
180  */
181 #define CPU_SUBTYPE_MASK	0xff000000	/* mask for feature flags */
182 #define CPU_SUBTYPE_LIB64	0x80000000	/* 64 bit libraries */
183 
184 
185 /*
186  *	Object files that are hand-crafted to run on any
187  *	implementation of an architecture are tagged with
188  *	CPU_SUBTYPE_MULTIPLE.  This functions essentially the same as
189  *	the "ALL" subtype of an architecture except that it allows us
190  *	to easily find object files that may need to be modified
191  *	whenever a new implementation of an architecture comes out.
192  *
193  *	It is the responsibility of the implementor to make sure the
194  *	software handles unsupported implementations elegantly.
195  */
196 #define	CPU_SUBTYPE_MULTIPLE		((cpu_subtype_t) -1)
197 #define CPU_SUBTYPE_LITTLE_ENDIAN	((cpu_subtype_t) 0)
198 #define CPU_SUBTYPE_BIG_ENDIAN		((cpu_subtype_t) 1)
199 
200 /*
201  *     Machine threadtypes.
202  *     This is none - not defined - for most machine types/subtypes.
203  */
204 #define CPU_THREADTYPE_NONE		((cpu_threadtype_t) 0)
205 
206 /*
207  *	VAX subtypes (these do *not* necessary conform to the actual cpu
208  *	ID assigned by DEC available via the SID register).
209  */
210 
211 #define	CPU_SUBTYPE_VAX_ALL	((cpu_subtype_t) 0) 
212 #define CPU_SUBTYPE_VAX780	((cpu_subtype_t) 1)
213 #define CPU_SUBTYPE_VAX785	((cpu_subtype_t) 2)
214 #define CPU_SUBTYPE_VAX750	((cpu_subtype_t) 3)
215 #define CPU_SUBTYPE_VAX730	((cpu_subtype_t) 4)
216 #define CPU_SUBTYPE_UVAXI	((cpu_subtype_t) 5)
217 #define CPU_SUBTYPE_UVAXII	((cpu_subtype_t) 6)
218 #define CPU_SUBTYPE_VAX8200	((cpu_subtype_t) 7)
219 #define CPU_SUBTYPE_VAX8500	((cpu_subtype_t) 8)
220 #define CPU_SUBTYPE_VAX8600	((cpu_subtype_t) 9)
221 #define CPU_SUBTYPE_VAX8650	((cpu_subtype_t) 10)
222 #define CPU_SUBTYPE_VAX8800	((cpu_subtype_t) 11)
223 #define CPU_SUBTYPE_UVAXIII	((cpu_subtype_t) 12)
224 
225 /*
226  * 	680x0 subtypes
227  *
228  * The subtype definitions here are unusual for historical reasons.
229  * NeXT used to consider 68030 code as generic 68000 code.  For
230  * backwards compatability:
231  * 
232  *	CPU_SUBTYPE_MC68030 symbol has been preserved for source code
233  *	compatability.
234  *
235  *	CPU_SUBTYPE_MC680x0_ALL has been defined to be the same
236  *	subtype as CPU_SUBTYPE_MC68030 for binary comatability.
237  *
238  *	CPU_SUBTYPE_MC68030_ONLY has been added to allow new object
239  *	files to be tagged as containing 68030-specific instructions.
240  */
241 
242 #define	CPU_SUBTYPE_MC680x0_ALL		((cpu_subtype_t) 1)
243 #define CPU_SUBTYPE_MC68030		((cpu_subtype_t) 1) /* compat */
244 #define CPU_SUBTYPE_MC68040		((cpu_subtype_t) 2) 
245 #define	CPU_SUBTYPE_MC68030_ONLY	((cpu_subtype_t) 3)
246 
247 /*
248  *	I386 subtypes
249  */
250 
251 #define CPU_SUBTYPE_INTEL(f, m)	((cpu_subtype_t) (f) + ((m) << 4))
252 
253 #define	CPU_SUBTYPE_I386_ALL			CPU_SUBTYPE_INTEL(3, 0)
254 #define CPU_SUBTYPE_386					CPU_SUBTYPE_INTEL(3, 0)
255 #define CPU_SUBTYPE_486					CPU_SUBTYPE_INTEL(4, 0)
256 #define CPU_SUBTYPE_486SX				CPU_SUBTYPE_INTEL(4, 8)	// 8 << 4 = 128
257 #define CPU_SUBTYPE_586					CPU_SUBTYPE_INTEL(5, 0)
258 #define CPU_SUBTYPE_PENT	CPU_SUBTYPE_INTEL(5, 0)
259 #define CPU_SUBTYPE_PENTPRO	CPU_SUBTYPE_INTEL(6, 1)
260 #define CPU_SUBTYPE_PENTII_M3	CPU_SUBTYPE_INTEL(6, 3)
261 #define CPU_SUBTYPE_PENTII_M5	CPU_SUBTYPE_INTEL(6, 5)
262 #define CPU_SUBTYPE_CELERON				CPU_SUBTYPE_INTEL(7, 6)
263 #define CPU_SUBTYPE_CELERON_MOBILE		CPU_SUBTYPE_INTEL(7, 7)
264 #define CPU_SUBTYPE_PENTIUM_3			CPU_SUBTYPE_INTEL(8, 0)
265 #define CPU_SUBTYPE_PENTIUM_3_M			CPU_SUBTYPE_INTEL(8, 1)
266 #define CPU_SUBTYPE_PENTIUM_3_XEON		CPU_SUBTYPE_INTEL(8, 2)
267 #define CPU_SUBTYPE_PENTIUM_M			CPU_SUBTYPE_INTEL(9, 0)
268 #define CPU_SUBTYPE_PENTIUM_4			CPU_SUBTYPE_INTEL(10, 0)
269 #define CPU_SUBTYPE_PENTIUM_4_M			CPU_SUBTYPE_INTEL(10, 1)
270 #define CPU_SUBTYPE_ITANIUM				CPU_SUBTYPE_INTEL(11, 0)
271 #define CPU_SUBTYPE_ITANIUM_2			CPU_SUBTYPE_INTEL(11, 1)
272 #define CPU_SUBTYPE_XEON				CPU_SUBTYPE_INTEL(12, 0)
273 #define CPU_SUBTYPE_XEON_MP				CPU_SUBTYPE_INTEL(12, 1)
274 
275 #define CPU_SUBTYPE_INTEL_FAMILY(x)	((x) & 15)
276 #define CPU_SUBTYPE_INTEL_FAMILY_MAX	15
277 
278 #define CPU_SUBTYPE_INTEL_MODEL(x)	((x) >> 4)
279 #define CPU_SUBTYPE_INTEL_MODEL_ALL	0
280 
281 /*
282  *	X86 subtypes.
283  */
284 
285 #define CPU_SUBTYPE_X86_ALL		((cpu_subtype_t)3)
286 #define CPU_SUBTYPE_X86_64_ALL		((cpu_subtype_t)3)
287 #define CPU_SUBTYPE_X86_ARCH1		((cpu_subtype_t)4)
288 
289 
290 #define CPU_THREADTYPE_INTEL_HTT	((cpu_threadtype_t) 1)
291 
292 /*
293  *	Mips subtypes.
294  */
295 
296 #define	CPU_SUBTYPE_MIPS_ALL	((cpu_subtype_t) 0)
297 #define CPU_SUBTYPE_MIPS_R2300	((cpu_subtype_t) 1)
298 #define CPU_SUBTYPE_MIPS_R2600	((cpu_subtype_t) 2)
299 #define CPU_SUBTYPE_MIPS_R2800	((cpu_subtype_t) 3)
300 #define CPU_SUBTYPE_MIPS_R2000a	((cpu_subtype_t) 4)	/* pmax */
301 #define CPU_SUBTYPE_MIPS_R2000	((cpu_subtype_t) 5)
302 #define CPU_SUBTYPE_MIPS_R3000a	((cpu_subtype_t) 6)	/* 3max */
303 #define CPU_SUBTYPE_MIPS_R3000	((cpu_subtype_t) 7)
304 
305 /*
306  *	MC98000 (PowerPC) subtypes
307  */
308 #define	CPU_SUBTYPE_MC98000_ALL	((cpu_subtype_t) 0)
309 #define CPU_SUBTYPE_MC98601	((cpu_subtype_t) 1)
310 
311 /*
312  *	HPPA subtypes for Hewlett-Packard HP-PA family of
313  *	risc processors. Port by NeXT to 700 series. 
314  */
315 
316 #define	CPU_SUBTYPE_HPPA_ALL		((cpu_subtype_t) 0)
317 #define CPU_SUBTYPE_HPPA_7100		((cpu_subtype_t) 0) /* compat */
318 #define CPU_SUBTYPE_HPPA_7100LC		((cpu_subtype_t) 1)
319 
320 /*
321  *	MC88000 subtypes.
322  */
323 #define	CPU_SUBTYPE_MC88000_ALL	((cpu_subtype_t) 0)
324 #define CPU_SUBTYPE_MC88100	((cpu_subtype_t) 1)
325 #define CPU_SUBTYPE_MC88110	((cpu_subtype_t) 2)
326 
327 /*
328  *	SPARC subtypes
329  */
330 #define	CPU_SUBTYPE_SPARC_ALL		((cpu_subtype_t) 0)
331 
332 /*
333  *	I860 subtypes
334  */
335 #define CPU_SUBTYPE_I860_ALL	((cpu_subtype_t) 0)
336 #define CPU_SUBTYPE_I860_860	((cpu_subtype_t) 1)
337 
338 /*
339  *	PowerPC subtypes
340  */
341 #define CPU_SUBTYPE_POWERPC_ALL		((cpu_subtype_t) 0)
342 #define CPU_SUBTYPE_POWERPC_601		((cpu_subtype_t) 1)
343 #define CPU_SUBTYPE_POWERPC_602		((cpu_subtype_t) 2)
344 #define CPU_SUBTYPE_POWERPC_603		((cpu_subtype_t) 3)
345 #define CPU_SUBTYPE_POWERPC_603e	((cpu_subtype_t) 4)
346 #define CPU_SUBTYPE_POWERPC_603ev	((cpu_subtype_t) 5)
347 #define CPU_SUBTYPE_POWERPC_604		((cpu_subtype_t) 6)
348 #define CPU_SUBTYPE_POWERPC_604e	((cpu_subtype_t) 7)
349 #define CPU_SUBTYPE_POWERPC_620		((cpu_subtype_t) 8)
350 #define CPU_SUBTYPE_POWERPC_750		((cpu_subtype_t) 9)
351 #define CPU_SUBTYPE_POWERPC_7400	((cpu_subtype_t) 10)
352 #define CPU_SUBTYPE_POWERPC_7450	((cpu_subtype_t) 11)
353 #define CPU_SUBTYPE_POWERPC_970		((cpu_subtype_t) 100)
354 
355 /*
356  *	ARM subtypes
357  */
358 #define CPU_SUBTYPE_ARM_ALL             ((cpu_subtype_t) 0)
359 #define CPU_SUBTYPE_ARM_V4T             ((cpu_subtype_t) 5)
360 #define CPU_SUBTYPE_ARM_V6              ((cpu_subtype_t) 6)
361 #define CPU_SUBTYPE_ARM_V5TEJ           ((cpu_subtype_t) 7)
362 #define CPU_SUBTYPE_ARM_XSCALE		((cpu_subtype_t) 8)
363 #define CPU_SUBTYPE_ARM_V7		((cpu_subtype_t) 9)
364 
365 
366 typedef int vm_prot_t;
367 typedef int cpu_type_t;
368 typedef int cpu_subtype_t;
369 typedef int cpu_threadtype_t;
370 
371 #define FAT_MAGIC	0xcafebabe
372 #define FAT_CIGAM	0xbebafeca
373 
374 #define MH_MAGIC        0xfeedface
375 #define MH_CIGAM        0xcefaedfe
376 #define MH_MAGIC_64 	0xfeedfacf /* the 64-bit mach magic number */
377 #define MH_CIGAM_64 	0xcffaedfe /* NXSwapInt(MH_MAGIC_64) */
378 
379 struct fat_header {
380 	uint32_t	magic;
381 	uint32_t	nfat_arch;
382 };
383 
384 struct fat_arch {
385 	cpu_type_t	cputype;
386 	cpu_subtype_t	cpusubtype;
387 	uint32_t	offset;
388 	uint32_t	size;
389 	uint32_t	align;
390 };
391 
392 struct mach_header_magic {
393 	uint32_t        magic;
394 };
395 
396 struct mach_header {
397 	uint32_t        magic;
398 	cpu_type_t      cputype;
399 	cpu_subtype_t   cpusubtype;
400 	uint32_t        filetype;
401 	uint32_t        ncmds;
402 	uint32_t        sizeofcmds;
403 	uint32_t        flags;
404 };
405 
406 struct mach_header_64 {
407         uint32_t        magic;          /* mach magic number identifier */
408         cpu_type_t      cputype;        /* cpu specifier */
409         cpu_subtype_t   cpusubtype;     /* machine specifier */
410         uint32_t        filetype;       /* type of file */
411         uint32_t        ncmds;          /* number of load commands */
412         uint32_t        sizeofcmds;     /* the size of all the load commands */
413         uint32_t        flags;          /* flags */
414         uint32_t        reserved;       /* reserved */
415 };
416 
417 struct load_command {
418 	uint32_t cmd;
419 	uint32_t cmdsize;
420 };
421 
422 struct segment_command {
423 	uint32_t        cmd;
424 	uint32_t        cmdsize;
425 	char            segname[16];
426 	uint32_t        vmaddr;
427 	uint32_t        vmsize;
428 	uint32_t        fileoff;
429 	uint32_t        filesize;
430 	vm_prot_t       maxprot;
431 	vm_prot_t       initprot;
432 	uint32_t        nsects;
433 	uint32_t        flags;
434 };
435 
436 struct segment_command_64 { /* for 64-bit architectures */
437         uint32_t        cmd;            /* LC_SEGMENT_64 */
438         uint32_t        cmdsize;        /* includes sizeof section_64 structs */
439         char            segname[16];    /* segment name */
440         uint64_t        vmaddr;         /* memory address of this segment */
441         uint64_t        vmsize;         /* memory size of this segment */
442         uint64_t        fileoff;        /* file offset of this segment */
443         uint64_t        filesize;       /* amount to map from the file */
444         vm_prot_t       maxprot;        /* maximum VM protection */
445         vm_prot_t       initprot;       /* initial VM protection */
446         uint32_t        nsects;         /* number of sections in segment */
447         uint32_t        flags;          /* flags */
448 };
449 
450 struct section {
451 	char            sectname[16];
452 	char            segname[16];
453 	uint32_t        addr;
454 	uint32_t        size;
455 	uint32_t        offset;
456 	uint32_t        align;
457 	uint32_t        reloff;
458 	uint32_t        nreloc;
459 	uint32_t        flags;
460 	uint32_t        reserved1;
461 	uint32_t        reserved2;
462 };
463 
464 struct section_64 { /* for 64-bit architectures */
465         char            sectname[16];   /* name of this section */
466         char            segname[16];    /* segment this section goes in */
467         uint64_t        addr;           /* memory address of this section */
468         uint64_t        size;           /* size in bytes of this section */
469         uint32_t        offset;         /* file offset of this section */
470         uint32_t        align;          /* section alignment (power of 2) */
471         uint32_t        reloff;         /* file offset of relocation entries */
472         uint32_t        nreloc;         /* number of relocation entries */
473         uint32_t        flags;          /* flags (section type and attributes)*/
474         uint32_t        reserved1;      /* reserved (for offset or index) */
475         uint32_t        reserved2;      /* reserved (for count or sizeof) */
476         uint32_t        reserved3;      /* reserved */
477 };
478 
479 union lc_str {
480 	uint32_t        offset;
481 #ifndef __LP64__
482 	char            *ptr;
483 #endif 
484 };
485 
486 struct symtab_command {
487 	uint32_t	cmd;
488 	uint32_t	cmdsize;
489 	uint32_t	symoff;
490 	uint32_t	nsyms;
491 	uint32_t	stroff;
492 	uint32_t	strsize;
493 };
494 
495 struct dylib {
496 	union lc_str  name;
497 	uint32_t timestamp;
498 	uint32_t current_version;
499 	uint32_t compatibility_version;
500 };
501 
502 struct dylib_command {
503 	uint32_t        cmd;
504 	uint32_t        cmdsize;
505 	struct dylib    dylib;
506 };
507 
508 struct dylinker_command {
509 	uint32_t        cmd;
510 	uint32_t        cmdsize;
511 	union lc_str    name;
512 };
513 
514 struct dysymtab_command {
515 	uint32_t cmd;
516 	uint32_t cmdsize;
517 	uint32_t ilocalsym;
518 	uint32_t nlocalsym;
519 	uint32_t iextdefsym;
520 	uint32_t nextdefsym;
521 	uint32_t iundefsym;
522 	uint32_t nundefsym;
523 	uint32_t tocoff;
524 	uint32_t ntoc;
525 	uint32_t modtaboff;
526 	uint32_t nmodtab;
527 	uint32_t extrefsymoff;
528 	uint32_t nextrefsyms;
529 	uint32_t indirectsymoff;
530 	uint32_t nindirectsyms;
531 	uint32_t extreloff;
532 	uint32_t nextrel;
533 	uint32_t locreloff;
534 	uint32_t nlocrel;
535 };
536 
537 struct dylib_table_of_contents {
538 	uint32_t symbol_index;
539 	uint32_t module_index;
540 };	
541 
542 struct dylib_module {
543 	uint32_t module_name;
544 	uint32_t iextdefsym;
545 	uint32_t nextdefsym;
546 	uint32_t irefsym;
547 	uint32_t nrefsym;
548 	uint32_t ilocalsym;
549 	uint32_t nlocalsym;
550 	uint32_t iextrel;
551 	uint32_t nextrel;
552 	uint32_t iinit_iterm;
553 	uint32_t ninit_nterm;
554 	uint32_t objc_module_info_addr;
555 	uint32_t objc_module_info_size;
556 };
557 
558 struct twolevel_hints_command {
559 	uint32_t cmd;
560 	uint32_t cmdsize;
561 	uint32_t offset;
562 	uint32_t nhints;
563 };
564 
565 
566 #endif