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 #ifndef LC_UUID
  34 #define LC_UUID         0x1b
  35 struct uuid_command {
  36     uint32_t    cmd;            /* LC_UUID */
  37     uint32_t    cmdsize;        /* sizeof(struct uuid_command) */
  38     uint8_t     uuid[16];       /* the 128-bit uuid */
  39 };
  40 #endif
  41
  42 #ifndef S_16BYTE_LITERALS
  43         #define S_16BYTE_LITERALS 0xE
  44 #endif
  45
  46
  47 #include "FileAbstraction.hpp"
  48 #include "Architectures.hpp"
  49
  50 // utility to pair together a cpu-type and cpu-sub-type
  51 struct ArchPair
  52 {
  53         uint32_t        arch;
  54         uint32_t        subtype;
  55
  56         ArchPair(uint32_t cputype, uint32_t cpusubtype) : arch(cputype), subtype(cpusubtype) {}
  57
  58         bool operator<(const ArchPair& other) const {
  59                 if ( this->arch != other.arch )
  60                         return (this->arch < other.arch);
  61                 return (this->subtype < other.subtype);
  62         }
  63 };
  64
  65
  66 //
  67 // This abstraction layer makes every mach-o file look like a 64-bit mach-o file with native endianness
  68 //
  69
  70 //
  71 // mach-o load command
  72 //
  73 template <typename P>
  74 class macho_load_command {
  75 public:
  76         uint32_t                cmd() const                                             INLINE { return E::get32(command.cmd); }
  77         void                    set_cmd(uint32_t value)                 INLINE { E::set32(command.cmd, value); }
  78
  79         uint32_t                cmdsize() const                                 INLINE { return E::get32(command.cmdsize); }
  80         void                    set_cmdsize(uint32_t value)             INLINE { E::set32(command.cmdsize, value); }
  81
  82         typedef typename P::E           E;
  83 private:
  84         load_command    command;
  85 };
  86
  87
  88 //
  89 // mach-o segment load command
  90 //
  91 template <typename P> struct macho_segment_content {};
  92 template <> struct macho_segment_content<Pointer32<BigEndian> >    { segment_command    fields; enum { CMD = LC_SEGMENT         }; };
  93 template <> struct macho_segment_content<Pointer64<BigEndian> >    { segment_command_64 fields; enum { CMD = LC_SEGMENT_64      }; };
  94 template <> struct macho_segment_content<Pointer32<LittleEndian> > { segment_command    fields; enum { CMD = LC_SEGMENT         }; };
  95 template <> struct macho_segment_content<Pointer64<LittleEndian> > { segment_command_64 fields; enum { CMD = LC_SEGMENT_64      }; };
  96
  97 template <typename P>
  98 class macho_segment_command {
  99 public:
 100         uint32_t                cmd() const                                             INLINE { return E::get32(segment.fields.cmd); }
 101         void                    set_cmd(uint32_t value)                 INLINE { E::set32(segment.fields.cmd, value); }
 102
 103         uint32_t                cmdsize() const                                 INLINE { return E::get32(segment.fields.cmdsize); }
 104         void                    set_cmdsize(uint32_t value)             INLINE { E::set32(segment.fields.cmdsize, value); }
 105
 106         const char*             segname() const                                 INLINE { return segment.fields.segname; }
 107         void                    set_segname(const char* value)  INLINE { strncpy(segment.fields.segname, value, 16); }
 108
 109         uint64_t                vmaddr() const                                  INLINE { return P::getP(segment.fields.vmaddr); }
 110         void                    set_vmaddr(uint64_t value)              INLINE { P::setP(segment.fields.vmaddr, value); }
 111
 112         uint64_t                vmsize() const                                  INLINE { return P::getP(segment.fields.vmsize); }
 113         void                    set_vmsize(uint64_t value)              INLINE { P::setP(segment.fields.vmsize, value); }
 114
 115         uint64_t                fileoff() const                                 INLINE { return P::getP(segment.fields.fileoff); }
 116         void                    set_fileoff(uint64_t value)             INLINE { P::setP(segment.fields.fileoff, value); }
 117
 118         uint64_t                filesize() const                                INLINE { return P::getP(segment.fields.filesize); }
 119         void                    set_filesize(uint64_t value)    INLINE { P::setP(segment.fields.filesize, value); }
 120
 121         uint32_t                maxprot() const                                 INLINE { return E::get32(segment.fields.maxprot); }
 122         void                    set_maxprot(uint32_t value)             INLINE { E::set32((uint32_t&)segment.fields.maxprot, value); }
 123
 124         uint32_t                initprot() const                                INLINE { return E::get32(segment.fields.initprot); }
 125         void                    set_initprot(uint32_t value)    INLINE { E::set32((uint32_t&)segment.fields.initprot, value); }
 126
 127         uint32_t                nsects() const                                  INLINE { return E::get32(segment.fields.nsects); }
 128         void                    set_nsects(uint32_t value)              INLINE { E::set32(segment.fields.nsects, value); }
 129
 130         uint32_t                flags() const                                   INLINE { return E::get32(segment.fields.flags); }
 131         void                    set_flags(uint32_t value)               INLINE { E::set32(segment.fields.flags, value); }
 132
 133         enum {
 134                 CMD = macho_segment_content<P>::CMD
 135         };
 136
 137         typedef typename P::E           E;
 138 private:
 139         macho_segment_content<P>        segment;
 140 };
 141
 142
 143 //
 144 // mach-o section
 145 //
 146 template <typename P> struct macho_section_content {};
 147 template <> struct macho_section_content<Pointer32<BigEndian> >    { section    fields; };
 148 template <> struct macho_section_content<Pointer64<BigEndian> >    { section_64 fields; };
 149 template <> struct macho_section_content<Pointer32<LittleEndian> > { section    fields; };
 150 template <> struct macho_section_content<Pointer64<LittleEndian> > { section_64 fields; };
 151
 152 template <typename P>
 153 class macho_section {
 154 public:
 155         const char*             sectname() const                                INLINE { return section.fields.sectname; }
 156         void                    set_sectname(const char* value) INLINE { strncpy(section.fields.sectname, value, 16); }
 157
 158         const char*             segname() const                                 INLINE { return section.fields.segname; }
 159         void                    set_segname(const char* value)  INLINE { strncpy(section.fields.segname, value, 16); }
 160
 161         uint64_t                addr() const                                    INLINE { return P::getP(section.fields.addr); }
 162         void                    set_addr(uint64_t value)                INLINE { P::setP(section.fields.addr, value); }
 163
 164         uint64_t                size() const                                    INLINE { return P::getP(section.fields.size); }
 165         void                    set_size(uint64_t value)                INLINE { P::setP(section.fields.size, value); }
 166
 167         uint32_t                offset() const                                  INLINE { return E::get32(section.fields.offset); }
 168         void                    set_offset(uint32_t value)              INLINE { E::set32(section.fields.offset, value); }
 169
 170         uint32_t                align() const                                   INLINE { return E::get32(section.fields.align); }
 171         void                    set_align(uint32_t value)               INLINE { E::set32(section.fields.align, value); }
 172
 173         uint32_t                reloff() const                                  INLINE { return E::get32(section.fields.reloff); }
 174         void                    set_reloff(uint32_t value)              INLINE { E::set32(section.fields.reloff, value); }
 175
 176         uint32_t                nreloc() const                                  INLINE { return E::get32(section.fields.nreloc); }
 177         void                    set_nreloc(uint32_t value)              INLINE { E::set32(section.fields.nreloc, value); }
 178
 179         uint32_t                flags() const                                   INLINE { return E::get32(section.fields.flags); }
 180         void                    set_flags(uint32_t value)               INLINE { E::set32(section.fields.flags, value); }
 181
 182         uint32_t                reserved1() const                               INLINE { return E::get32(section.fields.reserved1); }
 183         void                    set_reserved1(uint32_t value)   INLINE { E::set32(section.fields.reserved1, value); }
 184
 185         uint32_t                reserved2() const                               INLINE { return E::get32(section.fields.reserved2); }
 186         void                    set_reserved2(uint32_t value)   INLINE { E::set32(section.fields.reserved2, value); }
 187
 188         typedef typename P::E           E;
 189 private:
 190         macho_section_content<P>        section;
 191 };
 192
 193
 194 //
 195 // mach-o dylib load command
 196 //
 197 template <typename P>
 198 class macho_dylib_command {
 199 public:
 200         uint32_t                cmd() const                                                                     INLINE { return E::get32(fields.cmd); }
 201         void                    set_cmd(uint32_t value)                                         INLINE { E::set32(fields.cmd, value); }
 202
 203         uint32_t                cmdsize() const                                                         INLINE { return E::get32(fields.cmdsize); }
 204         void                    set_cmdsize(uint32_t value)                                     INLINE { E::set32(fields.cmdsize, value); }
 205
 206         uint32_t                name_offset() const                                                     INLINE { return E::get32(fields.dylib.name.offset); }
 207         void                    set_name_offset(uint32_t value)                         INLINE { E::set32(fields.dylib.name.offset, value);  }
 208
 209         uint32_t                timestamp() const                                                       INLINE { return E::get32(fields.dylib.timestamp); }
 210         void                    set_timestamp(uint32_t value)                           INLINE { E::set32(fields.dylib.timestamp, value); }
 211
 212         uint32_t                current_version() const                                         INLINE { return E::get32(fields.dylib.current_version); }
 213         void                    set_current_version(uint32_t value)                     INLINE { E::set32(fields.dylib.current_version, value); }
 214
 215         uint32_t                compatibility_version() const                           INLINE { return E::get32(fields.dylib.compatibility_version); }
 216         void                    set_compatibility_version(uint32_t value)       INLINE { E::set32(fields.dylib.compatibility_version, value); }
 217
 218         const char*             name() const                                                            INLINE { return (const char*)&fields + name_offset(); }
 219         void                    set_name_offset()                                                       INLINE { set_name_offset(sizeof(fields)); }
 220
 221         typedef typename P::E           E;
 222 private:
 223         dylib_command   fields;
 224 };
 225
 226
 227 //
 228 // mach-o dylinker load command
 229 //
 230 template <typename P>
 231 class macho_dylinker_command {
 232 public:
 233         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 234         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 235
 236         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 237         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 238
 239         uint32_t                name_offset() const                                     INLINE { return E::get32(fields.name.offset); }
 240         void                    set_name_offset(uint32_t value)         INLINE { E::set32(fields.name.offset, value);  }
 241
 242         const char*             name() const                                            INLINE { return (const char*)&fields + name_offset(); }
 243         void                    set_name_offset()                                       INLINE { set_name_offset(sizeof(fields)); }
 244
 245         typedef typename P::E           E;
 246 private:
 247         dylinker_command        fields;
 248 };
 249
 250
 251 //
 252 // mach-o sub_framework load command
 253 //
 254 template <typename P>
 255 class macho_sub_framework_command {
 256 public:
 257         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 258         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 259
 260         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 261         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 262
 263         uint32_t                umbrella_offset() const                         INLINE { return E::get32(fields.umbrella.offset); }
 264         void                    set_umbrella_offset(uint32_t value)     INLINE { E::set32(fields.umbrella.offset, value);  }
 265
 266         const char*             umbrella() const                                        INLINE { return (const char*)&fields + umbrella_offset(); }
 267         void                    set_umbrella_offset()                           INLINE { set_umbrella_offset(sizeof(fields)); }
 268
 269         typedef typename P::E           E;
 270 private:
 271         sub_framework_command   fields;
 272 };
 273
 274
 275 //
 276 // mach-o sub_client load command
 277 //
 278 template <typename P>
 279 class macho_sub_client_command {
 280 public:
 281         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 282         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 283
 284         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 285         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 286
 287         uint32_t                client_offset() const                           INLINE { return E::get32(fields.client.offset); }
 288         void                    set_client_offset(uint32_t value)       INLINE { E::set32(fields.client.offset, value);  }
 289
 290         const char*             client() const                                          INLINE { return (const char*)&fields + client_offset(); }
 291         void                    set_client_offset()                                     INLINE { set_client_offset(sizeof(fields)); }
 292
 293         typedef typename P::E           E;
 294 private:
 295         sub_client_command      fields;
 296 };
 297
 298
 299 //
 300 // mach-o sub_umbrella load command
 301 //
 302 template <typename P>
 303 class macho_sub_umbrella_command {
 304 public:
 305         uint32_t                cmd() const                                                             INLINE { return E::get32(fields.cmd); }
 306         void                    set_cmd(uint32_t value)                                 INLINE { E::set32(fields.cmd, value); }
 307
 308         uint32_t                cmdsize() const                                                 INLINE { return E::get32(fields.cmdsize); }
 309         void                    set_cmdsize(uint32_t value)                             INLINE { E::set32(fields.cmdsize, value); }
 310
 311         uint32_t                sub_umbrella_offset() const                             INLINE { return E::get32(fields.sub_umbrella.offset); }
 312         void                    set_sub_umbrella_offset(uint32_t value) INLINE { E::set32(fields.sub_umbrella.offset, value);  }
 313
 314         const char*             sub_umbrella() const                                    INLINE { return (const char*)&fields + sub_umbrella_offset(); }
 315         void                    set_sub_umbrella_offset()                               INLINE { set_sub_umbrella_offset(sizeof(fields)); }
 316
 317         typedef typename P::E           E;
 318 private:
 319         sub_umbrella_command    fields;
 320 };
 321
 322
 323 //
 324 // mach-o sub_library load command
 325 //
 326 template <typename P>
 327 class macho_sub_library_command {
 328 public:
 329         uint32_t                cmd() const                                                             INLINE { return E::get32(fields.cmd); }
 330         void                    set_cmd(uint32_t value)                                 INLINE { E::set32(fields.cmd, value); }
 331
 332         uint32_t                cmdsize() const                                                 INLINE { return E::get32(fields.cmdsize); }
 333         void                    set_cmdsize(uint32_t value)                             INLINE { E::set32(fields.cmdsize, value); }
 334
 335         uint32_t                sub_library_offset() const                              INLINE { return E::get32(fields.sub_library.offset); }
 336         void                    set_sub_library_offset(uint32_t value)  INLINE { E::set32(fields.sub_library.offset, value);  }
 337
 338         const char*             sub_library() const                                             INLINE { return (const char*)&fields + sub_library_offset(); }
 339         void                    set_sub_library_offset()                                INLINE { set_sub_library_offset(sizeof(fields)); }
 340
 341         typedef typename P::E           E;
 342 private:
 343         sub_library_command     fields;
 344 };
 345
 346
 347 //
 348 // mach-o uuid load command
 349 //
 350 template <typename P>
 351 class macho_uuid_command {
 352 public:
 353         uint32_t                cmd() const                                                             INLINE { return E::get32(fields.cmd); }
 354         void                    set_cmd(uint32_t value)                                 INLINE { E::set32(fields.cmd, value); }
 355
 356         uint32_t                cmdsize() const                                                 INLINE { return E::get32(fields.cmdsize); }
 357         void                    set_cmdsize(uint32_t value)                             INLINE { E::set32(fields.cmdsize, value); }
 358
 359         const uint8_t*  uuid() const                                                    INLINE { return fields.uuid; }
 360         void                    set_uuid(uint8_t value[16])                             INLINE { memcpy(&fields.uuid, value, 16); }
 361
 362         typedef typename P::E           E;
 363 private:
 364         uuid_command    fields;
 365 };
 366
 367
 368 //
 369 // mach-o routines load command
 370 //
 371 template <typename P> struct macho_routines_content {};
 372 template <> struct macho_routines_content<Pointer32<BigEndian> >    { routines_command          fields; enum { CMD = LC_ROUTINES        }; };
 373 template <> struct macho_routines_content<Pointer64<BigEndian> >        { routines_command_64   fields; enum { CMD = LC_ROUTINES_64     }; };
 374 template <> struct macho_routines_content<Pointer32<LittleEndian> > { routines_command          fields; enum { CMD = LC_ROUTINES        }; };
 375 template <> struct macho_routines_content<Pointer64<LittleEndian> > { routines_command_64       fields; enum { CMD = LC_ROUTINES_64     }; };
 376
 377 template <typename P>
 378 class macho_routines_command {
 379 public:
 380         uint32_t                cmd() const                                                     INLINE { return E::get32(routines.fields.cmd); }
 381         void                    set_cmd(uint32_t value)                         INLINE { E::set32(routines.fields.cmd, value); }
 382
 383         uint32_t                cmdsize() const                                         INLINE { return E::get32(routines.fields.cmdsize); }
 384         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(routines.fields.cmdsize, value); }
 385
 386         uint64_t                init_address() const                            INLINE { return P::getP(routines.fields.init_address); }
 387         void                    set_init_address(uint64_t value)        INLINE { P::setP(routines.fields.init_address, value); }
 388
 389         uint64_t                init_module() const                                     INLINE { return P::getP(routines.fields.init_module); }
 390         void                    set_init_module(uint64_t value)         INLINE { P::setP(routines.fields.init_module, value); }
 391
 392         uint64_t                reserved1() const                                       INLINE { return P::getP(routines.fields.reserved1); }
 393         void                    set_reserved1(uint64_t value)           INLINE { P::setP(routines.fields.reserved1, value); }
 394
 395         uint64_t                reserved2() const                                       INLINE { return P::getP(routines.fields.reserved2); }
 396         void                    set_reserved2(uint64_t value)           INLINE { P::setP(routines.fields.reserved2, value); }
 397
 398         uint64_t                reserved3() const                                       INLINE { return P::getP(routines.fields.reserved3); }
 399         void                    set_reserved3(uint64_t value)           INLINE { P::setP(routines.fields.reserved3, value); }
 400
 401         uint64_t                reserved4() const                                       INLINE { return P::getP(routines.fields.reserved4); }
 402         void                    set_reserved4(uint64_t value)           INLINE { P::setP(routines.fields.reserved4, value); }
 403
 404         uint64_t                reserved5() const                                       INLINE { return P::getP(routines.fields.reserved5); }
 405         void                    set_reserved5(uint64_t value)           INLINE { P::setP(routines.fields.reserved5, value); }
 406
 407         uint64_t                reserved6() const                                       INLINE { return P::getP(routines.fields.reserved6); }
 408         void                    set_reserved6(uint64_t value)           INLINE { P::setP(routines.fields.reserved6, value); }
 409
 410         typedef typename P::E           E;
 411         enum {
 412                 CMD = macho_routines_content<P>::CMD
 413         };
 414 private:
 415         macho_routines_content<P>       routines;
 416 };
 417
 418
 419 //
 420 // mach-o symbol table load command
 421 //
 422 template <typename P>
 423 class macho_symtab_command {
 424 public:
 425         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 426         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 427
 428         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 429         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 430
 431         uint32_t                symoff() const                          INLINE { return E::get32(fields.symoff); }
 432         void                    set_symoff(uint32_t value)      INLINE { E::set32(fields.symoff, value);  }
 433
 434         uint32_t                nsyms() const                           INLINE { return E::get32(fields.nsyms); }
 435         void                    set_nsyms(uint32_t value)       INLINE { E::set32(fields.nsyms, value);  }
 436
 437         uint32_t                stroff() const                          INLINE { return E::get32(fields.stroff); }
 438         void                    set_stroff(uint32_t value)      INLINE { E::set32(fields.stroff, value);  }
 439
 440         uint32_t                strsize() const                         INLINE { return E::get32(fields.strsize); }
 441         void                    set_strsize(uint32_t value)     INLINE { E::set32(fields.strsize, value);  }
 442
 443
 444         typedef typename P::E           E;
 445 private:
 446         symtab_command  fields;
 447 };
 448
 449
 450 //
 451 // mach-o dynamic symbol table load command
 452 //
 453 template <typename P>
 454 class macho_dysymtab_command {
 455 public:
 456         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 457         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 458
 459         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 460         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 461
 462         uint32_t                ilocalsym() const                                       INLINE { return E::get32(fields.ilocalsym); }
 463         void                    set_ilocalsym(uint32_t value)           INLINE { E::set32(fields.ilocalsym, value);  }
 464
 465         uint32_t                nlocalsym() const                                       INLINE { return E::get32(fields.nlocalsym); }
 466         void                    set_nlocalsym(uint32_t value)           INLINE { E::set32(fields.nlocalsym, value);  }
 467
 468         uint32_t                iextdefsym() const                                      INLINE { return E::get32(fields.iextdefsym); }
 469         void                    set_iextdefsym(uint32_t value)          INLINE { E::set32(fields.iextdefsym, value);  }
 470
 471         uint32_t                nextdefsym() const                                      INLINE { return E::get32(fields.nextdefsym); }
 472         void                    set_nextdefsym(uint32_t value)          INLINE { E::set32(fields.nextdefsym, value);  }
 473
 474         uint32_t                iundefsym() const                                       INLINE { return E::get32(fields.iundefsym); }
 475         void                    set_iundefsym(uint32_t value)           INLINE { E::set32(fields.iundefsym, value);  }
 476
 477         uint32_t                nundefsym() const                                       INLINE { return E::get32(fields.nundefsym); }
 478         void                    set_nundefsym(uint32_t value)           INLINE { E::set32(fields.nundefsym, value);  }
 479
 480         uint32_t                tocoff() const                                          INLINE { return E::get32(fields.tocoff); }
 481         void                    set_tocoff(uint32_t value)                      INLINE { E::set32(fields.tocoff, value);  }
 482
 483         uint32_t                ntoc() const                                            INLINE { return E::get32(fields.ntoc); }
 484         void                    set_ntoc(uint32_t value)                        INLINE { E::set32(fields.ntoc, value);  }
 485
 486         uint32_t                modtaboff() const                                       INLINE { return E::get32(fields.modtaboff); }
 487         void                    set_modtaboff(uint32_t value)           INLINE { E::set32(fields.modtaboff, value);  }
 488
 489         uint32_t                nmodtab() const                                         INLINE { return E::get32(fields.nmodtab); }
 490         void                    set_nmodtab(uint32_t value)                     INLINE { E::set32(fields.nmodtab, value);  }
 491
 492         uint32_t                extrefsymoff() const                            INLINE { return E::get32(fields.extrefsymoff); }
 493         void                    set_extrefsymoff(uint32_t value)        INLINE { E::set32(fields.extrefsymoff, value);  }
 494
 495         uint32_t                nextrefsyms() const                                     INLINE { return E::get32(fields.nextrefsyms); }
 496         void                    set_nextrefsyms(uint32_t value)         INLINE { E::set32(fields.nextrefsyms, value);  }
 497
 498         uint32_t                indirectsymoff() const                          INLINE { return E::get32(fields.indirectsymoff); }
 499         void                    set_indirectsymoff(uint32_t value)      INLINE { E::set32(fields.indirectsymoff, value);  }
 500
 501         uint32_t                nindirectsyms() const                           INLINE { return E::get32(fields.nindirectsyms); }
 502         void                    set_nindirectsyms(uint32_t value)       INLINE { E::set32(fields.nindirectsyms, value);  }
 503
 504         uint32_t                extreloff() const                                       INLINE { return E::get32(fields.extreloff); }
 505         void                    set_extreloff(uint32_t value)           INLINE { E::set32(fields.extreloff, value);  }
 506
 507         uint32_t                nextrel() const                                         INLINE { return E::get32(fields.nextrel); }
 508         void                    set_nextrel(uint32_t value)                     INLINE { E::set32(fields.nextrel, value);  }
 509
 510         uint32_t                locreloff() const                                       INLINE { return E::get32(fields.locreloff); }
 511         void                    set_locreloff(uint32_t value)           INLINE { E::set32(fields.locreloff, value);  }
 512
 513         uint32_t                nlocrel() const                                         INLINE { return E::get32(fields.nlocrel); }
 514         void                    set_nlocrel(uint32_t value)                     INLINE { E::set32(fields.nlocrel, value);  }
 515
 516         typedef typename P::E           E;
 517 private:
 518         dysymtab_command        fields;
 519 };
 520
 521
 522 //
 523 // mach-o two-level hints load command
 524 //
 525 template <typename P>
 526 class macho_twolevel_hints_command {
 527 public:
 528         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 529         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 530
 531         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 532         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 533
 534         uint32_t                offset() const                          INLINE { return E::get32(fields.offset); }
 535         void                    set_offset(uint32_t value)      INLINE { E::set32(fields.offset, value);  }
 536
 537         uint32_t                nhints() const                          INLINE { return E::get32(fields.nhints); }
 538         void                    set_nhints(uint32_t value)      INLINE { E::set32(fields.nhints, value);  }
 539
 540         typedef typename P::E           E;
 541 private:
 542         twolevel_hints_command  fields;
 543 };
 544
 545
 546 //
 547 // mach-o threads load command
 548 //
 549 template <typename P>
 550 class macho_thread_command {
 551 public:
 552         uint32_t                cmd() const                                                                                     INLINE { return E::get32(fields.cmd); }
 553         void                    set_cmd(uint32_t value)                                                         INLINE { E::set32(fields.cmd, value); }
 554
 555         uint32_t                cmdsize() const                                                                         INLINE { return E::get32(fields.cmdsize); }
 556         void                    set_cmdsize(uint32_t value)                                                     INLINE { E::set32(fields.cmdsize, value); }
 557
 558         uint32_t                flavor() const                                                                          INLINE { return E::get32(fields_flavor); }
 559         void                    set_flavor(uint32_t value)                                                      INLINE { E::set32(fields_flavor, value);  }
 560
 561         uint32_t                count() const                                                                           INLINE { return E::get32(fields_count); }
 562         void                    set_count(uint32_t value)                                                       INLINE { E::set32(fields_count, value);  }
 563
 564         uint64_t                thread_register(uint32_t index) const                           INLINE { return P::getP(thread_registers[index]); }
 565         void                    set_thread_register(uint32_t index, uint64_t value)     INLINE { P::setP(thread_registers[index], value); }
 566
 567         typedef typename P::E           E;
 568         typedef typename P::uint_t      pint_t;
 569 private:
 570         struct thread_command   fields;
 571         uint32_t                                fields_flavor;
 572         uint32_t                                fields_count;
 573         pint_t                                  thread_registers[1];
 574 };
 575
 576
 577 //
 578 // mach-o misc data
 579 //
 580 template <typename P>
 581 class macho_linkedit_data_command {
 582 public:
 583         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 584         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 585
 586         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 587         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 588
 589         uint32_t                dataoff() const                         INLINE { return E::get32(fields.dataoff); }
 590         void                    set_dataoff(uint32_t value)     INLINE { E::set32(fields.dataoff, value);  }
 591
 592         uint32_t                datasize() const                        INLINE { return E::get32(fields.datasize); }
 593         void                    set_datasize(uint32_t value)INLINE { E::set32(fields.datasize, value);  }
 594
 595
 596         typedef typename P::E           E;
 597 private:
 598         linkedit_data_command   fields;
 599 };
 600
 601
 602 //
 603 // mach-o symbol table entry
 604 //
 605 template <typename P> struct macho_nlist_content {};
 606 template <> struct macho_nlist_content<Pointer32<BigEndian> >    { struct nlist         fields; };
 607 template <> struct macho_nlist_content<Pointer64<BigEndian> >    { struct nlist_64      fields; };
 608 template <> struct macho_nlist_content<Pointer32<LittleEndian> > { struct nlist         fields; };
 609 template <> struct macho_nlist_content<Pointer64<LittleEndian> > { struct nlist_64      fields; };
 610
 611 template <typename P>
 612 class macho_nlist {
 613 public:
 614         uint32_t                n_strx() const                                  INLINE { return E::get32(entry.fields.n_un.n_strx); }
 615         void                    set_n_strx(uint32_t value)              INLINE { E::set32((uint32_t&)entry.fields.n_un.n_strx, value); }
 616
 617         uint8_t                 n_type() const                                  INLINE { return entry.fields.n_type; }
 618         void                    set_n_type(uint8_t value)               INLINE { entry.fields.n_type = value; }
 619
 620         uint8_t                 n_sect() const                                  INLINE { return entry.fields.n_sect; }
 621         void                    set_n_sect(uint8_t value)               INLINE { entry.fields.n_sect = value; }
 622
 623         uint16_t                n_desc() const                                  INLINE { return E::get16(entry.fields.n_desc); }
 624         void                    set_n_desc(uint16_t value)              INLINE { E::set16((uint16_t&)entry.fields.n_desc, value); }
 625
 626         uint64_t                n_value() const                                 INLINE { return P::getP(entry.fields.n_value); }
 627         void                    set_n_value(uint64_t value)             INLINE { P::setP(entry.fields.n_value, value); }
 628
 629         typedef typename P::E           E;
 630 private:
 631         macho_nlist_content<P>  entry;
 632 };
 633
 634
 635
 636 //
 637 // mach-o relocation info
 638 //
 639 template <typename P>
 640 class macho_relocation_info {
 641 public:
 642         uint32_t                r_address() const                               INLINE { return E::get32(address); }
 643         void                    set_r_address(uint32_t value)   INLINE { E::set32(address, value); }
 644
 645         uint32_t                r_symbolnum() const                             INLINE { return E::getBits(other, 0, 24); }
 646         void                    set_r_symbolnum(uint32_t value) INLINE { E::setBits(other, value, 0, 24); }
 647
 648         bool                    r_pcrel() const                                 INLINE { return E::getBits(other, 24, 1); }
 649         void                    set_r_pcrel(bool value)                 INLINE { E::setBits(other, value, 24, 1); }
 650
 651         uint8_t                 r_length() const                                INLINE { return E::getBits(other, 25, 2); }
 652         void                    set_r_length(uint8_t value)             INLINE { E::setBits(other, value, 25, 2); }
 653
 654         bool                    r_extern() const                                INLINE { return E::getBits(other, 27, 1); }
 655         void                    set_r_extern(bool value)                INLINE { E::setBits(other, value, 27, 1); }
 656
 657         uint8_t                 r_type() const                                  INLINE { return E::getBits(other, 28, 4); }
 658         void                    set_r_type(uint8_t value)               INLINE { E::setBits(other, value, 28, 4); }
 659
 660         void                    set_r_length()                                  INLINE { set_r_length((sizeof(typename P::uint_t)==8) ? 3 : 2); }
 661
 662         typedef typename P::E           E;
 663 private:
 664         uint32_t                address;
 665         uint32_t                other;
 666 };
 667
 668
 669 //
 670 // mach-o scattered relocation info
 671 // The bit fields are always in big-endian order (see mach-o/reloc.h)
 672 //
 673 template <typename P>
 674 class macho_scattered_relocation_info {
 675 public:
 676         bool                    r_scattered() const                     INLINE { return BigEndian::getBitsRaw(E::get32(other), 0, 1); }
 677         void                    set_r_scattered(bool x)         INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 0, 1);  E::set32(other, temp); }
 678
 679         bool                    r_pcrel() const                         INLINE { return BigEndian::getBitsRaw(E::get32(other), 1, 1); }
 680         void                    set_r_pcrel(bool x)                     INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 1, 1);  E::set32(other, temp); }
 681
 682         uint8_t                 r_length() const                        INLINE { return BigEndian::getBitsRaw(E::get32(other), 2, 2); }
 683         void                    set_r_length(uint8_t x)         INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 2, 2);  E::set32(other, temp); }
 684
 685         uint8_t                 r_type() const                          INLINE { return BigEndian::getBitsRaw(E::get32(other), 4, 4); }
 686         void                    set_r_type(uint8_t x)           INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 4, 4);  E::set32(other, temp); }
 687
 688         uint32_t                r_address() const                       INLINE { return BigEndian::getBitsRaw(E::get32(other), 8, 24); }
 689         void                    set_r_address(uint32_t x)       INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 8, 24);  E::set32(other, temp); }
 690
 691         uint32_t                r_value() const                         INLINE { return E::get32(value); }
 692         void                    set_r_value(uint32_t x)         INLINE { E::set32(value, x); }
 693
 694         uint32_t                r_other() const                         INLINE { return other; }
 695
 696         typedef typename P::E           E;
 697 private:
 698         uint32_t                other;
 699         uint32_t                value;
 700 };
 701
 702
 703 //
 704 // mach-o file header
 705 //
 706 template <typename P> struct macho_header_content {};
 707 template <> struct macho_header_content<Pointer32<BigEndian> >    { mach_header         fields; };
 708 template <> struct macho_header_content<Pointer64<BigEndian> >    { mach_header_64      fields; };
 709 template <> struct macho_header_content<Pointer32<LittleEndian> > { mach_header         fields; };
 710 template <> struct macho_header_content<Pointer64<LittleEndian> > { mach_header_64      fields; };
 711
 712 template <typename P>
 713 class macho_header {
 714 public:
 715         uint32_t                magic() const                                   INLINE { return E::get32(header.fields.magic); }
 716         void                    set_magic(uint32_t value)               INLINE { E::set32(header.fields.magic, value); }
 717
 718         uint32_t                cputype() const                                 INLINE { return E::get32(header.fields.cputype); }
 719         void                    set_cputype(uint32_t value)             INLINE { E::set32((uint32_t&)header.fields.cputype, value); }
 720
 721         uint32_t                cpusubtype() const                              INLINE { return E::get32(header.fields.cpusubtype); }
 722         void                    set_cpusubtype(uint32_t value)  INLINE { E::set32((uint32_t&)header.fields.cpusubtype, value); }
 723
 724         uint32_t                filetype() const                                INLINE { return E::get32(header.fields.filetype); }
 725         void                    set_filetype(uint32_t value)    INLINE { E::set32(header.fields.filetype, value); }
 726
 727         uint32_t                ncmds() const                                   INLINE { return E::get32(header.fields.ncmds); }
 728         void                    set_ncmds(uint32_t value)               INLINE { E::set32(header.fields.ncmds, value); }
 729
 730         uint32_t                sizeofcmds() const                              INLINE { return E::get32(header.fields.sizeofcmds); }
 731         void                    set_sizeofcmds(uint32_t value)  INLINE { E::set32(header.fields.sizeofcmds, value); }
 732
 733         uint32_t                flags() const                                   INLINE { return E::get32(header.fields.flags); }
 734         void                    set_flags(uint32_t value)               INLINE { E::set32(header.fields.flags, value); }
 735
 736         uint32_t                reserved() const                                INLINE { return E::get32(header.fields.reserved); }
 737         void                    set_reserved(uint32_t value)    INLINE { E::set32(header.fields.reserved, value); }
 738
 739     const macho_segment_command<P>* getSegment(const char *segname) const
 740     {
 741         const macho_load_command<P>* const cmds = (macho_load_command<P>*)((uint8_t*)this + sizeof(macho_header<P>));
 742         const uint32_t cmd_count = this->ncmds();
 743         const macho_load_command<P>* cmd = cmds;
 744         for (uint32_t i = 0; i < cmd_count; ++i) {
 745             if ( cmd->cmd() == macho_segment_command<P>::CMD ) {
 746                 const macho_segment_command<P>* segcmd =
 747                     (macho_segment_command<P>*)cmd;
 748                 if (0 == strncmp(segname, segcmd->segname(), 16)) {
 749                     return segcmd;
 750                 }
 751             }
 752             cmd = (const macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize());
 753         }
 754         return NULL;
 755     }
 756
 757     const macho_section<P>* getSection(const char *segname, const char *sectname) const
 758     {
 759         const macho_segment_command<P>* const segcmd = getSegment(segname);
 760         if (!segcmd) return NULL;
 761
 762         const macho_section<P>* sectcmd = (macho_section<P>*)(segcmd+1);
 763         const uint32_t section_count = segcmd->nsects();
 764         for (uint32_t j = 0; j < section_count; ++j) {
 765             if (0 == ::strncmp(sectcmd[j].sectname(), sectname, 16)) {
 766                 return sectcmd+j;
 767             }
 768         }
 769
 770         return NULL;
 771     }
 772
 773         typedef typename P::E           E;
 774 private:
 775         macho_header_content<P> header;
 776 };
 777
 778
 779
 780 //
 781 // compressed dyld info load command
 782 //
 783 template <typename P>
 784 class macho_dyld_info_command {
 785 public:
 786         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 787         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 788
 789         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 790         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 791
 792         uint32_t                rebase_off() const                              INLINE { return E::get32(fields.rebase_off); }
 793         void                    set_rebase_off(uint32_t value)  INLINE { E::set32(fields.rebase_off, value);  }
 794
 795         uint32_t                rebase_size() const                             INLINE { return E::get32(fields.rebase_size); }
 796         void                    set_rebase_size(uint32_t value) INLINE { E::set32(fields.rebase_size, value);  }
 797
 798         uint32_t                bind_off() const                                INLINE { return E::get32(fields.bind_off); }
 799         void                    set_bind_off(uint32_t value)    INLINE { E::set32(fields.bind_off, value);  }
 800
 801         uint32_t                bind_size() const                               INLINE { return E::get32(fields.bind_size); }
 802         void                    set_bind_size(uint32_t value)   INLINE { E::set32(fields.bind_size, value);  }
 803
 804         uint32_t                weak_bind_off() const                           INLINE { return E::get32(fields.weak_bind_off); }
 805         void                    set_weak_bind_off(uint32_t value)       INLINE { E::set32(fields.weak_bind_off, value);  }
 806
 807         uint32_t                weak_bind_size() const                          INLINE { return E::get32(fields.weak_bind_size); }
 808         void                    set_weak_bind_size(uint32_t value)      INLINE { E::set32(fields.weak_bind_size, value);  }
 809
 810         uint32_t                lazy_bind_off() const                           INLINE { return E::get32(fields.lazy_bind_off); }
 811         void                    set_lazy_bind_off(uint32_t value)       INLINE { E::set32(fields.lazy_bind_off, value);  }
 812
 813         uint32_t                lazy_bind_size() const                          INLINE { return E::get32(fields.lazy_bind_size); }
 814         void                    set_lazy_bind_size(uint32_t value)      INLINE { E::set32(fields.lazy_bind_size, value);  }
 815
 816         uint32_t                export_off() const                              INLINE { return E::get32(fields.export_off); }
 817         void                    set_export_off(uint32_t value)  INLINE { E::set32(fields.export_off, value);  }
 818
 819         uint32_t                export_size() const                             INLINE { return E::get32(fields.export_size); }
 820         void                    set_export_size(uint32_t value) INLINE { E::set32(fields.export_size, value);  }
 821
 822
 823         typedef typename P::E           E;
 824 private:
 825         dyld_info_command       fields;
 826 };
 827
 828 #ifndef NO_ULEB
 829 inline uint64_t read_uleb128(const uint8_t*& p, const uint8_t* end) {
 830         uint64_t result = 0;
 831         int              bit = 0;
 832         do {
 833                 if (p == end)
 834                         throw "malformed uleb128 extends beyond trie";
 835
 836                 uint64_t slice = *p & 0x7f;
 837
 838                 if (bit >= 64 || slice << bit >> bit != slice)
 839                         throw "uleb128 too big for 64-bits";
 840                 else {
 841                         result |= (slice << bit);
 842                         bit += 7;
 843                 }
 844         }
 845         while (*p++ & 0x80);
 846         return result;
 847 }
 848
 849
 850 static int64_t read_sleb128(const uint8_t*& p, const uint8_t* end)
 851 {
 852         int64_t result = 0;
 853         int bit = 0;
 854         uint8_t byte;
 855         do {
 856                 if (p == end)
 857                         throw "malformed sleb128";
 858                 byte = *p++;
 859                 result |= ((byte & 0x7f) << bit);
 860                 bit += 7;
 861         } while (byte & 0x80);
 862         // sign extend negative numbers
 863         if ( (byte & 0x40) != 0 )
 864                 result |= (-1LL) << bit;
 865         return result;
 866 }
 867
 868 #endif
 869
 870
 871 #endif  // __MACH_O_FILE_ABSTRACTION__
 872
 873