launch-cache/MachOFileAbstraction.hpp

   1 /* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
   4  *
   5  * @APPLE_LICENSE_HEADER_START@
   6  *
   7  * This file contains Original Code and/or Modifications of Original Code
   8  * as defined in and that are subject to the Apple Public Source License
   9  * Version 2.0 (the 'License'). You may not use this file except in
  10  * compliance with the License. Please obtain a copy of the License at
  11  * http://www.opensource.apple.com/apsl/ and read it before using this
  12  * file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  19  * Please see the License for the specific language governing rights and
  20  * limitations under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23 */
  24 #ifndef __MACH_O_FILE_ABSTRACTION__
  25 #define __MACH_O_FILE_ABSTRACTION__
  26
  27 #include <mach-o/loader.h>
  28 #include <mach-o/nlist.h>
  29 #include <mach-o/reloc.h>
  30 #include <mach/machine.h>
  31
  32 // suport older versions of mach-o/loader.h
  33
  34
  35
  36 #define ARM64_RELOC_UNSIGNED            0 // for pointers
  37
  38
  39
  40
  41 #define DYLD_CACHE_ADJ_V2_FORMAT                                0x7F
  42
  43 #define DYLD_CACHE_ADJ_V2_POINTER_32                    0x01
  44 #define DYLD_CACHE_ADJ_V2_POINTER_64                    0x02
  45 #define DYLD_CACHE_ADJ_V2_DELTA_32                          0x03
  46 #define DYLD_CACHE_ADJ_V2_DELTA_64                          0x04
  47 #define DYLD_CACHE_ADJ_V2_ARM64_ADRP                    0x05
  48 #define DYLD_CACHE_ADJ_V2_ARM64_OFF12                   0x06
  49 #define DYLD_CACHE_ADJ_V2_ARM64_BR26                    0x07
  50 #define DYLD_CACHE_ADJ_V2_ARM_MOVW_MOVT                 0x08
  51 #define DYLD_CACHE_ADJ_V2_ARM_BR24                              0x09
  52 #define DYLD_CACHE_ADJ_V2_THUMB_MOVW_MOVT               0x0A
  53 #define DYLD_CACHE_ADJ_V2_THUMB_BR22                    0x0B
  54 #define DYLD_CACHE_ADJ_V2_IMAGE_OFF_32                  0x0C
  55
  56
  57 #include "FileAbstraction.hpp"
  58 #include "Architectures.hpp"
  59
  60 // utility to pair together a cpu-type and cpu-sub-type
  61 struct ArchPair
  62 {
  63         uint32_t        arch;
  64         uint32_t        subtype;
  65
  66         ArchPair(uint32_t cputype, uint32_t cpusubtype) : arch(cputype), subtype(cpusubtype) {}
  67
  68         bool operator<(const ArchPair& other) const {
  69                 if ( this->arch != other.arch )
  70                         return (this->arch < other.arch);
  71                 return (this->subtype < other.subtype);
  72         }
  73
  74         bool operator==(const ArchPair& other) const {
  75         return this->arch == other.arch  &&  this->subtype == other.subtype;
  76         }
  77 };
  78
  79
  80 //
  81 // This abstraction layer makes every mach-o file look like a 64-bit mach-o file with native endianness
  82 //
  83
  84 //
  85 // mach-o load command
  86 //
  87 template <typename P>
  88 class macho_load_command {
  89 public:
  90         uint32_t                cmd() const                                             INLINE { return E::get32(command.cmd); }
  91         void                    set_cmd(uint32_t value)                 INLINE { E::set32(command.cmd, value); }
  92
  93         uint32_t                cmdsize() const                                 INLINE { return E::get32(command.cmdsize); }
  94         void                    set_cmdsize(uint32_t value)             INLINE { E::set32(command.cmdsize, value); }
  95
  96         typedef typename P::E           E;
  97 private:
  98         load_command    command;
  99 };
 100
 101
 102 //
 103 // mach-o segment load command
 104 //
 105 template <typename P> struct macho_segment_content {};
 106 template <> struct macho_segment_content<Pointer32<BigEndian> >    { segment_command    fields; enum { CMD = LC_SEGMENT         }; };
 107 template <> struct macho_segment_content<Pointer64<BigEndian> >    { segment_command_64 fields; enum { CMD = LC_SEGMENT_64      }; };
 108 template <> struct macho_segment_content<Pointer32<LittleEndian> > { segment_command    fields; enum { CMD = LC_SEGMENT         }; };
 109 template <> struct macho_segment_content<Pointer64<LittleEndian> > { segment_command_64 fields; enum { CMD = LC_SEGMENT_64      }; };
 110
 111 template <typename P>
 112 class macho_segment_command {
 113 public:
 114         uint32_t                cmd() const                                             INLINE { return E::get32(segment.fields.cmd); }
 115         void                    set_cmd(uint32_t value)                 INLINE { E::set32(segment.fields.cmd, value); }
 116
 117         uint32_t                cmdsize() const                                 INLINE { return E::get32(segment.fields.cmdsize); }
 118         void                    set_cmdsize(uint32_t value)             INLINE { E::set32(segment.fields.cmdsize, value); }
 119
 120         const char*             segname() const                                 INLINE { return segment.fields.segname; }
 121         void                    set_segname(const char* value)  INLINE { strncpy(segment.fields.segname, value, 16); }
 122
 123         uint64_t                vmaddr() const                                  INLINE { return P::getP(segment.fields.vmaddr); }
 124         void                    set_vmaddr(uint64_t value)              INLINE { P::setP(segment.fields.vmaddr, value); }
 125
 126         uint64_t                vmsize() const                                  INLINE { return P::getP(segment.fields.vmsize); }
 127         void                    set_vmsize(uint64_t value)              INLINE { P::setP(segment.fields.vmsize, value); }
 128
 129         uint64_t                fileoff() const                                 INLINE { return P::getP(segment.fields.fileoff); }
 130         void                    set_fileoff(uint64_t value)             INLINE { P::setP(segment.fields.fileoff, value); }
 131
 132         uint64_t                filesize() const                                INLINE { return P::getP(segment.fields.filesize); }
 133         void                    set_filesize(uint64_t value)    INLINE { P::setP(segment.fields.filesize, value); }
 134
 135         uint32_t                maxprot() const                                 INLINE { return E::get32(segment.fields.maxprot); }
 136         void                    set_maxprot(uint32_t value)             INLINE { E::set32((uint32_t&)segment.fields.maxprot, value); }
 137
 138         uint32_t                initprot() const                                INLINE { return E::get32(segment.fields.initprot); }
 139         void                    set_initprot(uint32_t value)    INLINE { E::set32((uint32_t&)segment.fields.initprot, value); }
 140
 141         uint32_t                nsects() const                                  INLINE { return E::get32(segment.fields.nsects); }
 142         void                    set_nsects(uint32_t value)              INLINE { E::set32(segment.fields.nsects, value); }
 143
 144         uint32_t                flags() const                                   INLINE { return E::get32(segment.fields.flags); }
 145         void                    set_flags(uint32_t value)               INLINE { E::set32(segment.fields.flags, value); }
 146
 147         enum {
 148                 CMD = macho_segment_content<P>::CMD
 149         };
 150
 151         typedef typename P::E           E;
 152 private:
 153         macho_segment_content<P>        segment;
 154 };
 155
 156
 157 //
 158 // mach-o section
 159 //
 160 template <typename P> struct macho_section_content {};
 161 template <> struct macho_section_content<Pointer32<BigEndian> >    { section    fields; };
 162 template <> struct macho_section_content<Pointer64<BigEndian> >    { section_64 fields; };
 163 template <> struct macho_section_content<Pointer32<LittleEndian> > { section    fields; };
 164 template <> struct macho_section_content<Pointer64<LittleEndian> > { section_64 fields; };
 165
 166 template <typename P>
 167 class macho_section {
 168 public:
 169         const char*             sectname() const                                INLINE { return section.fields.sectname; }
 170         void                    set_sectname(const char* value) INLINE { strncpy(section.fields.sectname, value, 16); }
 171
 172         const char*             segname() const                                 INLINE { return section.fields.segname; }
 173         void                    set_segname(const char* value)  INLINE { strncpy(section.fields.segname, value, 16); }
 174
 175         uint64_t                addr() const                                    INLINE { return P::getP(section.fields.addr); }
 176         void                    set_addr(uint64_t value)                INLINE { P::setP(section.fields.addr, value); }
 177
 178         uint64_t                size() const                                    INLINE { return P::getP(section.fields.size); }
 179         void                    set_size(uint64_t value)                INLINE { P::setP(section.fields.size, value); }
 180
 181         uint32_t                offset() const                                  INLINE { return E::get32(section.fields.offset); }
 182         void                    set_offset(uint32_t value)              INLINE { E::set32(section.fields.offset, value); }
 183
 184         uint32_t                align() const                                   INLINE { return E::get32(section.fields.align); }
 185         void                    set_align(uint32_t value)               INLINE { E::set32(section.fields.align, value); }
 186
 187         uint32_t                reloff() const                                  INLINE { return E::get32(section.fields.reloff); }
 188         void                    set_reloff(uint32_t value)              INLINE { E::set32(section.fields.reloff, value); }
 189
 190         uint32_t                nreloc() const                                  INLINE { return E::get32(section.fields.nreloc); }
 191         void                    set_nreloc(uint32_t value)              INLINE { E::set32(section.fields.nreloc, value); }
 192
 193         uint32_t                flags() const                                   INLINE { return E::get32(section.fields.flags); }
 194         void                    set_flags(uint32_t value)               INLINE { E::set32(section.fields.flags, value); }
 195
 196         uint32_t                reserved1() const                               INLINE { return E::get32(section.fields.reserved1); }
 197         void                    set_reserved1(uint32_t value)   INLINE { E::set32(section.fields.reserved1, value); }
 198
 199         uint32_t                reserved2() const                               INLINE { return E::get32(section.fields.reserved2); }
 200         void                    set_reserved2(uint32_t value)   INLINE { E::set32(section.fields.reserved2, value); }
 201
 202         typedef typename P::E           E;
 203 private:
 204         macho_section_content<P>        section;
 205 };
 206
 207
 208 //
 209 // mach-o dylib load command
 210 //
 211 template <typename P>
 212 class macho_dylib_command {
 213 public:
 214         uint32_t                cmd() const                                                                     INLINE { return E::get32(fields.cmd); }
 215         void                    set_cmd(uint32_t value)                                         INLINE { E::set32(fields.cmd, value); }
 216
 217         uint32_t                cmdsize() const                                                         INLINE { return E::get32(fields.cmdsize); }
 218         void                    set_cmdsize(uint32_t value)                                     INLINE { E::set32(fields.cmdsize, value); }
 219
 220         uint32_t                name_offset() const                                                     INLINE { return E::get32(fields.dylib.name.offset); }
 221         void                    set_name_offset(uint32_t value)                         INLINE { E::set32(fields.dylib.name.offset, value);  }
 222
 223         uint32_t                timestamp() const                                                       INLINE { return E::get32(fields.dylib.timestamp); }
 224         void                    set_timestamp(uint32_t value)                           INLINE { E::set32(fields.dylib.timestamp, value); }
 225
 226         uint32_t                current_version() const                                         INLINE { return E::get32(fields.dylib.current_version); }
 227         void                    set_current_version(uint32_t value)                     INLINE { E::set32(fields.dylib.current_version, value); }
 228
 229         uint32_t                compatibility_version() const                           INLINE { return E::get32(fields.dylib.compatibility_version); }
 230         void                    set_compatibility_version(uint32_t value)       INLINE { E::set32(fields.dylib.compatibility_version, value); }
 231
 232         const char*             name() const                                                            INLINE { return (const char*)&fields + name_offset(); }
 233         void                    set_name_offset()                                                       INLINE { set_name_offset(sizeof(fields)); }
 234
 235         typedef typename P::E           E;
 236 private:
 237         dylib_command   fields;
 238 };
 239
 240
 241 //
 242 // mach-o dylinker load command
 243 //
 244 template <typename P>
 245 class macho_dylinker_command {
 246 public:
 247         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 248         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 249
 250         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 251         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 252
 253         uint32_t                name_offset() const                                     INLINE { return E::get32(fields.name.offset); }
 254         void                    set_name_offset(uint32_t value)         INLINE { E::set32(fields.name.offset, value);  }
 255
 256         const char*             name() const                                            INLINE { return (const char*)&fields + name_offset(); }
 257         void                    set_name_offset()                                       INLINE { set_name_offset(sizeof(fields)); }
 258
 259         typedef typename P::E           E;
 260 private:
 261         dylinker_command        fields;
 262 };
 263
 264
 265 //
 266 // mach-o sub_framework load command
 267 //
 268 template <typename P>
 269 class macho_sub_framework_command {
 270 public:
 271         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 272         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 273
 274         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 275         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 276
 277         uint32_t                umbrella_offset() const                         INLINE { return E::get32(fields.umbrella.offset); }
 278         void                    set_umbrella_offset(uint32_t value)     INLINE { E::set32(fields.umbrella.offset, value);  }
 279
 280         const char*             umbrella() const                                        INLINE { return (const char*)&fields + umbrella_offset(); }
 281         void                    set_umbrella_offset()                           INLINE { set_umbrella_offset(sizeof(fields)); }
 282
 283         typedef typename P::E           E;
 284 private:
 285         sub_framework_command   fields;
 286 };
 287
 288
 289 //
 290 // mach-o sub_client load command
 291 //
 292 template <typename P>
 293 class macho_sub_client_command {
 294 public:
 295         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 296         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 297
 298         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 299         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 300
 301         uint32_t                client_offset() const                           INLINE { return E::get32(fields.client.offset); }
 302         void                    set_client_offset(uint32_t value)       INLINE { E::set32(fields.client.offset, value);  }
 303
 304         const char*             client() const                                          INLINE { return (const char*)&fields + client_offset(); }
 305         void                    set_client_offset()                                     INLINE { set_client_offset(sizeof(fields)); }
 306
 307         typedef typename P::E           E;
 308 private:
 309         sub_client_command      fields;
 310 };
 311
 312
 313 //
 314 // mach-o sub_umbrella load command
 315 //
 316 template <typename P>
 317 class macho_sub_umbrella_command {
 318 public:
 319         uint32_t                cmd() const                                                             INLINE { return E::get32(fields.cmd); }
 320         void                    set_cmd(uint32_t value)                                 INLINE { E::set32(fields.cmd, value); }
 321
 322         uint32_t                cmdsize() const                                                 INLINE { return E::get32(fields.cmdsize); }
 323         void                    set_cmdsize(uint32_t value)                             INLINE { E::set32(fields.cmdsize, value); }
 324
 325         uint32_t                sub_umbrella_offset() const                             INLINE { return E::get32(fields.sub_umbrella.offset); }
 326         void                    set_sub_umbrella_offset(uint32_t value) INLINE { E::set32(fields.sub_umbrella.offset, value);  }
 327
 328         const char*             sub_umbrella() const                                    INLINE { return (const char*)&fields + sub_umbrella_offset(); }
 329         void                    set_sub_umbrella_offset()                               INLINE { set_sub_umbrella_offset(sizeof(fields)); }
 330
 331         typedef typename P::E           E;
 332 private:
 333         sub_umbrella_command    fields;
 334 };
 335
 336
 337 //
 338 // mach-o sub_library load command
 339 //
 340 template <typename P>
 341 class macho_sub_library_command {
 342 public:
 343         uint32_t                cmd() const                                                             INLINE { return E::get32(fields.cmd); }
 344         void                    set_cmd(uint32_t value)                                 INLINE { E::set32(fields.cmd, value); }
 345
 346         uint32_t                cmdsize() const                                                 INLINE { return E::get32(fields.cmdsize); }
 347         void                    set_cmdsize(uint32_t value)                             INLINE { E::set32(fields.cmdsize, value); }
 348
 349         uint32_t                sub_library_offset() const                              INLINE { return E::get32(fields.sub_library.offset); }
 350         void                    set_sub_library_offset(uint32_t value)  INLINE { E::set32(fields.sub_library.offset, value);  }
 351
 352         const char*             sub_library() const                                             INLINE { return (const char*)&fields + sub_library_offset(); }
 353         void                    set_sub_library_offset()                                INLINE { set_sub_library_offset(sizeof(fields)); }
 354
 355         typedef typename P::E           E;
 356 private:
 357         sub_library_command     fields;
 358 };
 359
 360
 361 //
 362 // mach-o uuid load command
 363 //
 364 template <typename P>
 365 class macho_uuid_command {
 366 public:
 367         uint32_t                cmd() const                                                             INLINE { return E::get32(fields.cmd); }
 368         void                    set_cmd(uint32_t value)                                 INLINE { E::set32(fields.cmd, value); }
 369
 370         uint32_t                cmdsize() const                                                 INLINE { return E::get32(fields.cmdsize); }
 371         void                    set_cmdsize(uint32_t value)                             INLINE { E::set32(fields.cmdsize, value); }
 372
 373         const uint8_t*  uuid() const                                                    INLINE { return fields.uuid; }
 374         void                    set_uuid(uint8_t value[16])                             INLINE { memcpy(&fields.uuid, value, 16); }
 375
 376         typedef typename P::E           E;
 377 private:
 378         uuid_command    fields;
 379 };
 380
 381
 382 //
 383 // mach-o routines load command
 384 //
 385 template <typename P> struct macho_routines_content {};
 386 template <> struct macho_routines_content<Pointer32<BigEndian> >    { routines_command          fields; enum { CMD = LC_ROUTINES        }; };
 387 template <> struct macho_routines_content<Pointer64<BigEndian> >        { routines_command_64   fields; enum { CMD = LC_ROUTINES_64     }; };
 388 template <> struct macho_routines_content<Pointer32<LittleEndian> > { routines_command          fields; enum { CMD = LC_ROUTINES        }; };
 389 template <> struct macho_routines_content<Pointer64<LittleEndian> > { routines_command_64       fields; enum { CMD = LC_ROUTINES_64     }; };
 390
 391 template <typename P>
 392 class macho_routines_command {
 393 public:
 394         uint32_t                cmd() const                                                     INLINE { return E::get32(routines.fields.cmd); }
 395         void                    set_cmd(uint32_t value)                         INLINE { E::set32(routines.fields.cmd, value); }
 396
 397         uint32_t                cmdsize() const                                         INLINE { return E::get32(routines.fields.cmdsize); }
 398         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(routines.fields.cmdsize, value); }
 399
 400         uint64_t                init_address() const                            INLINE { return P::getP(routines.fields.init_address); }
 401         void                    set_init_address(uint64_t value)        INLINE { P::setP(routines.fields.init_address, value); }
 402
 403         uint64_t                init_module() const                                     INLINE { return P::getP(routines.fields.init_module); }
 404         void                    set_init_module(uint64_t value)         INLINE { P::setP(routines.fields.init_module, value); }
 405
 406         uint64_t                reserved1() const                                       INLINE { return P::getP(routines.fields.reserved1); }
 407         void                    set_reserved1(uint64_t value)           INLINE { P::setP(routines.fields.reserved1, value); }
 408
 409         uint64_t                reserved2() const                                       INLINE { return P::getP(routines.fields.reserved2); }
 410         void                    set_reserved2(uint64_t value)           INLINE { P::setP(routines.fields.reserved2, value); }
 411
 412         uint64_t                reserved3() const                                       INLINE { return P::getP(routines.fields.reserved3); }
 413         void                    set_reserved3(uint64_t value)           INLINE { P::setP(routines.fields.reserved3, value); }
 414
 415         uint64_t                reserved4() const                                       INLINE { return P::getP(routines.fields.reserved4); }
 416         void                    set_reserved4(uint64_t value)           INLINE { P::setP(routines.fields.reserved4, value); }
 417
 418         uint64_t                reserved5() const                                       INLINE { return P::getP(routines.fields.reserved5); }
 419         void                    set_reserved5(uint64_t value)           INLINE { P::setP(routines.fields.reserved5, value); }
 420
 421         uint64_t                reserved6() const                                       INLINE { return P::getP(routines.fields.reserved6); }
 422         void                    set_reserved6(uint64_t value)           INLINE { P::setP(routines.fields.reserved6, value); }
 423
 424         typedef typename P::E           E;
 425         enum {
 426                 CMD = macho_routines_content<P>::CMD
 427         };
 428 private:
 429         macho_routines_content<P>       routines;
 430 };
 431
 432
 433 //
 434 // mach-o symbol table load command
 435 //
 436 template <typename P>
 437 class macho_symtab_command {
 438 public:
 439         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 440         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 441
 442         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 443         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 444
 445         uint32_t                symoff() const                          INLINE { return E::get32(fields.symoff); }
 446         void                    set_symoff(uint32_t value)      INLINE { E::set32(fields.symoff, value);  }
 447
 448         uint32_t                nsyms() const                           INLINE { return E::get32(fields.nsyms); }
 449         void                    set_nsyms(uint32_t value)       INLINE { E::set32(fields.nsyms, value);  }
 450
 451         uint32_t                stroff() const                          INLINE { return E::get32(fields.stroff); }
 452         void                    set_stroff(uint32_t value)      INLINE { E::set32(fields.stroff, value);  }
 453
 454         uint32_t                strsize() const                         INLINE { return E::get32(fields.strsize); }
 455         void                    set_strsize(uint32_t value)     INLINE { E::set32(fields.strsize, value);  }
 456
 457
 458         typedef typename P::E           E;
 459 private:
 460         symtab_command  fields;
 461 };
 462
 463
 464 //
 465 // mach-o dynamic symbol table load command
 466 //
 467 template <typename P>
 468 class macho_dysymtab_command {
 469 public:
 470         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 471         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 472
 473         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 474         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 475
 476         uint32_t                ilocalsym() const                                       INLINE { return E::get32(fields.ilocalsym); }
 477         void                    set_ilocalsym(uint32_t value)           INLINE { E::set32(fields.ilocalsym, value);  }
 478
 479         uint32_t                nlocalsym() const                                       INLINE { return E::get32(fields.nlocalsym); }
 480         void                    set_nlocalsym(uint32_t value)           INLINE { E::set32(fields.nlocalsym, value);  }
 481
 482         uint32_t                iextdefsym() const                                      INLINE { return E::get32(fields.iextdefsym); }
 483         void                    set_iextdefsym(uint32_t value)          INLINE { E::set32(fields.iextdefsym, value);  }
 484
 485         uint32_t                nextdefsym() const                                      INLINE { return E::get32(fields.nextdefsym); }
 486         void                    set_nextdefsym(uint32_t value)          INLINE { E::set32(fields.nextdefsym, value);  }
 487
 488         uint32_t                iundefsym() const                                       INLINE { return E::get32(fields.iundefsym); }
 489         void                    set_iundefsym(uint32_t value)           INLINE { E::set32(fields.iundefsym, value);  }
 490
 491         uint32_t                nundefsym() const                                       INLINE { return E::get32(fields.nundefsym); }
 492         void                    set_nundefsym(uint32_t value)           INLINE { E::set32(fields.nundefsym, value);  }
 493
 494         uint32_t                tocoff() const                                          INLINE { return E::get32(fields.tocoff); }
 495         void                    set_tocoff(uint32_t value)                      INLINE { E::set32(fields.tocoff, value);  }
 496
 497         uint32_t                ntoc() const                                            INLINE { return E::get32(fields.ntoc); }
 498         void                    set_ntoc(uint32_t value)                        INLINE { E::set32(fields.ntoc, value);  }
 499
 500         uint32_t                modtaboff() const                                       INLINE { return E::get32(fields.modtaboff); }
 501         void                    set_modtaboff(uint32_t value)           INLINE { E::set32(fields.modtaboff, value);  }
 502
 503         uint32_t                nmodtab() const                                         INLINE { return E::get32(fields.nmodtab); }
 504         void                    set_nmodtab(uint32_t value)                     INLINE { E::set32(fields.nmodtab, value);  }
 505
 506         uint32_t                extrefsymoff() const                            INLINE { return E::get32(fields.extrefsymoff); }
 507         void                    set_extrefsymoff(uint32_t value)        INLINE { E::set32(fields.extrefsymoff, value);  }
 508
 509         uint32_t                nextrefsyms() const                                     INLINE { return E::get32(fields.nextrefsyms); }
 510         void                    set_nextrefsyms(uint32_t value)         INLINE { E::set32(fields.nextrefsyms, value);  }
 511
 512         uint32_t                indirectsymoff() const                          INLINE { return E::get32(fields.indirectsymoff); }
 513         void                    set_indirectsymoff(uint32_t value)      INLINE { E::set32(fields.indirectsymoff, value);  }
 514
 515         uint32_t                nindirectsyms() const                           INLINE { return E::get32(fields.nindirectsyms); }
 516         void                    set_nindirectsyms(uint32_t value)       INLINE { E::set32(fields.nindirectsyms, value);  }
 517
 518         uint32_t                extreloff() const                                       INLINE { return E::get32(fields.extreloff); }
 519         void                    set_extreloff(uint32_t value)           INLINE { E::set32(fields.extreloff, value);  }
 520
 521         uint32_t                nextrel() const                                         INLINE { return E::get32(fields.nextrel); }
 522         void                    set_nextrel(uint32_t value)                     INLINE { E::set32(fields.nextrel, value);  }
 523
 524         uint32_t                locreloff() const                                       INLINE { return E::get32(fields.locreloff); }
 525         void                    set_locreloff(uint32_t value)           INLINE { E::set32(fields.locreloff, value);  }
 526
 527         uint32_t                nlocrel() const                                         INLINE { return E::get32(fields.nlocrel); }
 528         void                    set_nlocrel(uint32_t value)                     INLINE { E::set32(fields.nlocrel, value);  }
 529
 530         typedef typename P::E           E;
 531 private:
 532         dysymtab_command        fields;
 533 };
 534
 535
 536 //
 537 // mach-o two-level hints load command
 538 //
 539 template <typename P>
 540 class macho_twolevel_hints_command {
 541 public:
 542         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 543         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 544
 545         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 546         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 547
 548         uint32_t                offset() const                          INLINE { return E::get32(fields.offset); }
 549         void                    set_offset(uint32_t value)      INLINE { E::set32(fields.offset, value);  }
 550
 551         uint32_t                nhints() const                          INLINE { return E::get32(fields.nhints); }
 552         void                    set_nhints(uint32_t value)      INLINE { E::set32(fields.nhints, value);  }
 553
 554         typedef typename P::E           E;
 555 private:
 556         twolevel_hints_command  fields;
 557 };
 558
 559
 560 //
 561 // mach-o threads load command
 562 //
 563 template <typename P>
 564 class macho_thread_command {
 565 public:
 566         uint32_t                cmd() const                                                                                     INLINE { return E::get32(fields.cmd); }
 567         void                    set_cmd(uint32_t value)                                                         INLINE { E::set32(fields.cmd, value); }
 568
 569         uint32_t                cmdsize() const                                                                         INLINE { return E::get32(fields.cmdsize); }
 570         void                    set_cmdsize(uint32_t value)                                                     INLINE { E::set32(fields.cmdsize, value); }
 571
 572         uint32_t                flavor() const                                                                          INLINE { return E::get32(fields_flavor); }
 573         void                    set_flavor(uint32_t value)                                                      INLINE { E::set32(fields_flavor, value);  }
 574
 575         uint32_t                count() const                                                                           INLINE { return E::get32(fields_count); }
 576         void                    set_count(uint32_t value)                                                       INLINE { E::set32(fields_count, value);  }
 577
 578         uint64_t                thread_register(uint32_t index) const                           INLINE { return P::getP(thread_registers[index]); }
 579         void                    set_thread_register(uint32_t index, uint64_t value)     INLINE { P::setP(thread_registers[index], value); }
 580
 581         typedef typename P::E           E;
 582         typedef typename P::uint_t      pint_t;
 583 private:
 584         struct thread_command   fields;
 585         uint32_t                                fields_flavor;
 586         uint32_t                                fields_count;
 587         pint_t                                  thread_registers[1];
 588 };
 589
 590
 591 //
 592 // mach-o misc data
 593 //
 594 template <typename P>
 595 class macho_linkedit_data_command {
 596 public:
 597         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 598         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 599
 600         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 601         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 602
 603         uint32_t                dataoff() const                         INLINE { return E::get32(fields.dataoff); }
 604         void                    set_dataoff(uint32_t value)     INLINE { E::set32(fields.dataoff, value);  }
 605
 606         uint32_t                datasize() const                        INLINE { return E::get32(fields.datasize); }
 607         void                    set_datasize(uint32_t value)INLINE { E::set32(fields.datasize, value);  }
 608
 609
 610         typedef typename P::E           E;
 611 private:
 612         linkedit_data_command   fields;
 613 };
 614
 615
 616 //
 617 // mach-o symbol table entry
 618 //
 619 template <typename P> struct macho_nlist_content {};
 620 template <> struct macho_nlist_content<Pointer32<BigEndian> >    { struct nlist         fields; };
 621 template <> struct macho_nlist_content<Pointer64<BigEndian> >    { struct nlist_64      fields; };
 622 template <> struct macho_nlist_content<Pointer32<LittleEndian> > { struct nlist         fields; };
 623 template <> struct macho_nlist_content<Pointer64<LittleEndian> > { struct nlist_64      fields; };
 624
 625 template <typename P>
 626 class macho_nlist {
 627 public:
 628         uint32_t                n_strx() const                                  INLINE { return E::get32(entry.fields.n_un.n_strx); }
 629         void                    set_n_strx(uint32_t value)              INLINE { E::set32((uint32_t&)entry.fields.n_un.n_strx, value); }
 630
 631         uint8_t                 n_type() const                                  INLINE { return entry.fields.n_type; }
 632         void                    set_n_type(uint8_t value)               INLINE { entry.fields.n_type = value; }
 633
 634         uint8_t                 n_sect() const                                  INLINE { return entry.fields.n_sect; }
 635         void                    set_n_sect(uint8_t value)               INLINE { entry.fields.n_sect = value; }
 636
 637         uint16_t                n_desc() const                                  INLINE { return E::get16(entry.fields.n_desc); }
 638         void                    set_n_desc(uint16_t value)              INLINE { E::set16((uint16_t&)entry.fields.n_desc, value); }
 639
 640         uint64_t                n_value() const                                 INLINE { return P::getP(entry.fields.n_value); }
 641         void                    set_n_value(uint64_t value)             INLINE { P::setP(entry.fields.n_value, value); }
 642
 643         typedef typename P::E           E;
 644 private:
 645         macho_nlist_content<P>  entry;
 646 };
 647
 648
 649
 650 //
 651 // mach-o relocation info
 652 //
 653 template <typename P>
 654 class macho_relocation_info {
 655 public:
 656         uint32_t                r_address() const                               INLINE { return E::get32(address); }
 657         void                    set_r_address(uint32_t value)   INLINE { E::set32(address, value); }
 658
 659         uint32_t                r_symbolnum() const                             INLINE { return E::getBits(other, 0, 24); }
 660         void                    set_r_symbolnum(uint32_t value) INLINE { E::setBits(other, value, 0, 24); }
 661
 662         bool                    r_pcrel() const                                 INLINE { return E::getBits(other, 24, 1); }
 663         void                    set_r_pcrel(bool value)                 INLINE { E::setBits(other, value, 24, 1); }
 664
 665         uint8_t                 r_length() const                                INLINE { return E::getBits(other, 25, 2); }
 666         void                    set_r_length(uint8_t value)             INLINE { E::setBits(other, value, 25, 2); }
 667
 668         bool                    r_extern() const                                INLINE { return E::getBits(other, 27, 1); }
 669         void                    set_r_extern(bool value)                INLINE { E::setBits(other, value, 27, 1); }
 670
 671         uint8_t                 r_type() const                                  INLINE { return E::getBits(other, 28, 4); }
 672         void                    set_r_type(uint8_t value)               INLINE { E::setBits(other, value, 28, 4); }
 673
 674         void                    set_r_length()                                  INLINE { set_r_length((sizeof(typename P::uint_t)==8) ? 3 : 2); }
 675
 676         typedef typename P::E           E;
 677 private:
 678         uint32_t                address;
 679         uint32_t                other;
 680 };
 681
 682
 683 //
 684 // mach-o scattered relocation info
 685 // The bit fields are always in big-endian order (see mach-o/reloc.h)
 686 //
 687 template <typename P>
 688 class macho_scattered_relocation_info {
 689 public:
 690         bool                    r_scattered() const                     INLINE { return BigEndian::getBitsRaw(E::get32(other), 0, 1); }
 691         void                    set_r_scattered(bool x)         INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 0, 1);  E::set32(other, temp); }
 692
 693         bool                    r_pcrel() const                         INLINE { return BigEndian::getBitsRaw(E::get32(other), 1, 1); }
 694         void                    set_r_pcrel(bool x)                     INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 1, 1);  E::set32(other, temp); }
 695
 696         uint8_t                 r_length() const                        INLINE { return BigEndian::getBitsRaw(E::get32(other), 2, 2); }
 697         void                    set_r_length(uint8_t x)         INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 2, 2);  E::set32(other, temp); }
 698
 699         uint8_t                 r_type() const                          INLINE { return BigEndian::getBitsRaw(E::get32(other), 4, 4); }
 700         void                    set_r_type(uint8_t x)           INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 4, 4);  E::set32(other, temp); }
 701
 702         uint32_t                r_address() const                       INLINE { return BigEndian::getBitsRaw(E::get32(other), 8, 24); }
 703         void                    set_r_address(uint32_t x)       INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 8, 24);  E::set32(other, temp); }
 704
 705         uint32_t                r_value() const                         INLINE { return E::get32(value); }
 706         void                    set_r_value(uint32_t x)         INLINE { E::set32(value, x); }
 707
 708         uint32_t                r_other() const                         INLINE { return other; }
 709
 710         typedef typename P::E           E;
 711 private:
 712         uint32_t                other;
 713         uint32_t                value;
 714 };
 715
 716
 717 //
 718 // mach-o file header
 719 //
 720 template <typename P> struct macho_header_content {};
 721 template <> struct macho_header_content<Pointer32<BigEndian> >    { mach_header         fields; };
 722 template <> struct macho_header_content<Pointer64<BigEndian> >    { mach_header_64      fields; };
 723 template <> struct macho_header_content<Pointer32<LittleEndian> > { mach_header         fields; };
 724 template <> struct macho_header_content<Pointer64<LittleEndian> > { mach_header_64      fields; };
 725
 726 template <typename P>
 727 class macho_header {
 728 public:
 729         uint32_t                magic() const                                   INLINE { return E::get32(header.fields.magic); }
 730         void                    set_magic(uint32_t value)               INLINE { E::set32(header.fields.magic, value); }
 731
 732         uint32_t                cputype() const                                 INLINE { return E::get32(header.fields.cputype); }
 733         void                    set_cputype(uint32_t value)             INLINE { E::set32((uint32_t&)header.fields.cputype, value); }
 734
 735         uint32_t                cpusubtype() const                              INLINE { return E::get32(header.fields.cpusubtype); }
 736         void                    set_cpusubtype(uint32_t value)  INLINE { E::set32((uint32_t&)header.fields.cpusubtype, value); }
 737
 738         uint32_t                filetype() const                                INLINE { return E::get32(header.fields.filetype); }
 739         void                    set_filetype(uint32_t value)    INLINE { E::set32(header.fields.filetype, value); }
 740
 741         uint32_t                ncmds() const                                   INLINE { return E::get32(header.fields.ncmds); }
 742         void                    set_ncmds(uint32_t value)               INLINE { E::set32(header.fields.ncmds, value); }
 743
 744         uint32_t                sizeofcmds() const                              INLINE { return E::get32(header.fields.sizeofcmds); }
 745         void                    set_sizeofcmds(uint32_t value)  INLINE { E::set32(header.fields.sizeofcmds, value); }
 746
 747         uint32_t                flags() const                                   INLINE { return E::get32(header.fields.flags); }
 748         void                    set_flags(uint32_t value)               INLINE { E::set32(header.fields.flags, value); }
 749
 750         uint32_t                reserved() const                                INLINE { return E::get32(header.fields.reserved); }
 751         void                    set_reserved(uint32_t value)    INLINE { E::set32(header.fields.reserved, value); }
 752
 753     const macho_segment_command<P>* getSegment(const char *segname) const
 754     {
 755         const macho_load_command<P>* cmds = (macho_load_command<P>*)((uint8_t*)this + sizeof(macho_header<P>));
 756         uint32_t cmd_count = this->ncmds();
 757         const macho_load_command<P>* cmd = cmds;
 758         for (uint32_t i = 0; i < cmd_count; ++i) {
 759             if ( cmd->cmd() == macho_segment_command<P>::CMD ) {
 760                 const macho_segment_command<P>* segcmd = (macho_segment_command<P>*)cmd;
 761                 if (0 == strncmp(segname, segcmd->segname(), 16)) {
 762                     return segcmd;
 763               }
 764             }
 765             cmd = (macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize());
 766         }
 767         return NULL;
 768     }
 769
 770     const macho_section<P>* getSection(const char *segname, const char *sectname) const
 771     {
 772        const  macho_segment_command<P>* segcmd = getSegment(segname);
 773         if (!segcmd) return NULL;
 774
 775         const macho_section<P>* sectcmd = (macho_section<P>*)(segcmd+1);
 776         uint32_t section_count = segcmd->nsects();
 777         for (uint32_t j = 0; j < section_count; ++j) {
 778             if (0 == ::strncmp(sectcmd[j].sectname(), sectname, 16)) {
 779                 return sectcmd+j;
 780             }
 781         }
 782
 783         if (strcmp(segname, "__DATA") == 0) {
 784                         if (const macho_section<P>* dataConst = getSection("__DATA_CONST", sectname))
 785                 return dataConst;
 786             if (const macho_section<P>* dataDirty = getSection("__DATA_DIRTY", sectname))
 787                 return dataDirty;
 788         }
 789         return NULL;
 790     }
 791
 792     const macho_load_command<P>* getLoadCommand(int query) const
 793     {
 794         const macho_load_command<P>* cmds = (macho_load_command<P>*)((uint8_t*)this + sizeof(macho_header<P>));
 795         uint32_t cmd_count = this->ncmds();
 796         const macho_load_command<P>* cmd = cmds;
 797         for (uint32_t i = 0; i < cmd_count; ++i) {
 798             if ( cmd->cmd() == query ) {
 799                 return cmd;
 800             }
 801             cmd = (macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize());
 802         }
 803         return NULL;
 804     }
 805
 806         typedef typename P::E           E;
 807 private:
 808         macho_header_content<P> header;
 809 };
 810
 811
 812
 813 //
 814 // compressed dyld info load command
 815 //
 816 template <typename P>
 817 class macho_dyld_info_command {
 818 public:
 819         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 820         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 821
 822         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 823         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 824
 825         uint32_t                rebase_off() const                              INLINE { return E::get32(fields.rebase_off); }
 826         void                    set_rebase_off(uint32_t value)  INLINE { E::set32(fields.rebase_off, value);  }
 827
 828         uint32_t                rebase_size() const                             INLINE { return E::get32(fields.rebase_size); }
 829         void                    set_rebase_size(uint32_t value) INLINE { E::set32(fields.rebase_size, value);  }
 830
 831         uint32_t                bind_off() const                                INLINE { return E::get32(fields.bind_off); }
 832         void                    set_bind_off(uint32_t value)    INLINE { E::set32(fields.bind_off, value);  }
 833
 834         uint32_t                bind_size() const                               INLINE { return E::get32(fields.bind_size); }
 835         void                    set_bind_size(uint32_t value)   INLINE { E::set32(fields.bind_size, value);  }
 836
 837         uint32_t                weak_bind_off() const                           INLINE { return E::get32(fields.weak_bind_off); }
 838         void                    set_weak_bind_off(uint32_t value)       INLINE { E::set32(fields.weak_bind_off, value);  }
 839
 840         uint32_t                weak_bind_size() const                          INLINE { return E::get32(fields.weak_bind_size); }
 841         void                    set_weak_bind_size(uint32_t value)      INLINE { E::set32(fields.weak_bind_size, value);  }
 842
 843         uint32_t                lazy_bind_off() const                           INLINE { return E::get32(fields.lazy_bind_off); }
 844         void                    set_lazy_bind_off(uint32_t value)       INLINE { E::set32(fields.lazy_bind_off, value);  }
 845
 846         uint32_t                lazy_bind_size() const                          INLINE { return E::get32(fields.lazy_bind_size); }
 847         void                    set_lazy_bind_size(uint32_t value)      INLINE { E::set32(fields.lazy_bind_size, value);  }
 848
 849         uint32_t                export_off() const                              INLINE { return E::get32(fields.export_off); }
 850         void                    set_export_off(uint32_t value)  INLINE { E::set32(fields.export_off, value);  }
 851
 852         uint32_t                export_size() const                             INLINE { return E::get32(fields.export_size); }
 853         void                    set_export_size(uint32_t value) INLINE { E::set32(fields.export_size, value);  }
 854
 855
 856         typedef typename P::E           E;
 857 private:
 858         dyld_info_command       fields;
 859 };
 860
 861 #ifndef NO_ULEB
 862 inline uint64_t read_uleb128(const uint8_t*& p, const uint8_t* end) {
 863         uint64_t result = 0;
 864         int              bit = 0;
 865         do {
 866                 if (p == end)
 867                         throw "malformed uleb128 extends beyond trie";
 868
 869                 uint64_t slice = *p & 0x7f;
 870
 871                 if (bit >= 64 || slice << bit >> bit != slice)
 872                         throw "uleb128 too big for 64-bits";
 873                 else {
 874                         result |= (slice << bit);
 875                         bit += 7;
 876                 }
 877         }
 878         while (*p++ & 0x80);
 879         return result;
 880 }
 881
 882
 883 inline int64_t read_sleb128(const uint8_t*& p, const uint8_t* end)
 884 {
 885         int64_t result = 0;
 886         int bit = 0;
 887         uint8_t byte;
 888         do {
 889                 if (p == end)
 890                         throw "malformed sleb128";
 891                 byte = *p++;
 892                 result |= (((int64_t)(byte & 0x7f)) << bit);
 893                 bit += 7;
 894         } while (byte & 0x80);
 895         // sign extend negative numbers
 896         if ( (byte & 0x40) != 0 )
 897                 result |= (~0ULL) << bit;
 898         return result;
 899 }
 900
 901 #endif
 902
 903
 904 #endif  // __MACH_O_FILE_ABSTRACTION__
 905
 906