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,
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  19  * Please see the License for the specific language governing rights and
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  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 #ifndef CPU_SUBTYPE_ARM_V5TEJ
  47         #define CPU_SUBTYPE_ARM_V5TEJ           ((cpu_subtype_t) 7)
  48 #endif
  49 #ifndef CPU_SUBTYPE_ARM_XSCALE
  50         #define CPU_SUBTYPE_ARM_XSCALE          ((cpu_subtype_t) 8)
  51 #endif
  52 #ifndef CPU_SUBTYPE_ARM_V7
  53         #define CPU_SUBTYPE_ARM_V7                      ((cpu_subtype_t) 9)
  54 #endif
  55
  56 #ifndef LC_LOAD_UPWARD_DYLIB
  57         #define LC_LOAD_UPWARD_DYLIB (0x23|LC_REQ_DYLD) /* load of dylib whose initializers run later */
  58 #endif
  59
  60 #ifndef EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER
  61         #define EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER 0x10
  62 #endif
  63 #ifndef EXPORT_SYMBOL_FLAGS_REEXPORT
  64         #define EXPORT_SYMBOL_FLAGS_REEXPORT 0x08
  65 #endif
  66
  67
  68 #include "FileAbstraction.hpp"
  69 #include "Architectures.hpp"
  70
  71 // utility to pair together a cpu-type and cpu-sub-type
  72 struct ArchPair
  73 {
  74         uint32_t        arch;
  75         uint32_t        subtype;
  76
  77         ArchPair(uint32_t cputype, uint32_t cpusubtype) : arch(cputype), subtype(cpusubtype) {}
  78
  79         bool operator<(const ArchPair& other) const {
  80                 if ( this->arch != other.arch )
  81                         return (this->arch < other.arch);
  82                 return (this->subtype < other.subtype);
  83         }
  84 };
  85
  86
  87 //
  88 // This abstraction layer makes every mach-o file look like a 64-bit mach-o file with native endianness
  89 //
  90
  91 //
  92 // mach-o load command
  93 //
  94 template <typename P>
  95 class macho_load_command {
  96 public:
  97         uint32_t                cmd() const                                             INLINE { return E::get32(command.cmd); }
  98         void                    set_cmd(uint32_t value)                 INLINE { E::set32(command.cmd, value); }
  99
 100         uint32_t                cmdsize() const                                 INLINE { return E::get32(command.cmdsize); }
 101         void                    set_cmdsize(uint32_t value)             INLINE { E::set32(command.cmdsize, value); }
 102
 103         typedef typename P::E           E;
 104 private:
 105         load_command    command;
 106 };
 107
 108
 109 //
 110 // mach-o segment load command
 111 //
 112 template <typename P> struct macho_segment_content {};
 113 template <> struct macho_segment_content<Pointer32<BigEndian> >    { segment_command    fields; enum { CMD = LC_SEGMENT         }; };
 114 template <> struct macho_segment_content<Pointer64<BigEndian> >    { segment_command_64 fields; enum { CMD = LC_SEGMENT_64      }; };
 115 template <> struct macho_segment_content<Pointer32<LittleEndian> > { segment_command    fields; enum { CMD = LC_SEGMENT         }; };
 116 template <> struct macho_segment_content<Pointer64<LittleEndian> > { segment_command_64 fields; enum { CMD = LC_SEGMENT_64      }; };
 117
 118 template <typename P>
 119 class macho_segment_command {
 120 public:
 121         uint32_t                cmd() const                                             INLINE { return E::get32(segment.fields.cmd); }
 122         void                    set_cmd(uint32_t value)                 INLINE { E::set32(segment.fields.cmd, value); }
 123
 124         uint32_t                cmdsize() const                                 INLINE { return E::get32(segment.fields.cmdsize); }
 125         void                    set_cmdsize(uint32_t value)             INLINE { E::set32(segment.fields.cmdsize, value); }
 126
 127         const char*             segname() const                                 INLINE { return segment.fields.segname; }
 128         void                    set_segname(const char* value)  INLINE { strncpy(segment.fields.segname, value, 16); }
 129
 130         uint64_t                vmaddr() const                                  INLINE { return P::getP(segment.fields.vmaddr); }
 131         void                    set_vmaddr(uint64_t value)              INLINE { P::setP(segment.fields.vmaddr, value); }
 132
 133         uint64_t                vmsize() const                                  INLINE { return P::getP(segment.fields.vmsize); }
 134         void                    set_vmsize(uint64_t value)              INLINE { P::setP(segment.fields.vmsize, value); }
 135
 136         uint64_t                fileoff() const                                 INLINE { return P::getP(segment.fields.fileoff); }
 137         void                    set_fileoff(uint64_t value)             INLINE { P::setP(segment.fields.fileoff, value); }
 138
 139         uint64_t                filesize() const                                INLINE { return P::getP(segment.fields.filesize); }
 140         void                    set_filesize(uint64_t value)    INLINE { P::setP(segment.fields.filesize, value); }
 141
 142         uint32_t                maxprot() const                                 INLINE { return E::get32(segment.fields.maxprot); }
 143         void                    set_maxprot(uint32_t value)             INLINE { E::set32((uint32_t&)segment.fields.maxprot, value); }
 144
 145         uint32_t                initprot() const                                INLINE { return E::get32(segment.fields.initprot); }
 146         void                    set_initprot(uint32_t value)    INLINE { E::set32((uint32_t&)segment.fields.initprot, value); }
 147
 148         uint32_t                nsects() const                                  INLINE { return E::get32(segment.fields.nsects); }
 149         void                    set_nsects(uint32_t value)              INLINE { E::set32(segment.fields.nsects, value); }
 150
 151         uint32_t                flags() const                                   INLINE { return E::get32(segment.fields.flags); }
 152         void                    set_flags(uint32_t value)               INLINE { E::set32(segment.fields.flags, value); }
 153
 154         enum {
 155                 CMD = macho_segment_content<P>::CMD
 156         };
 157
 158         typedef typename P::E           E;
 159 private:
 160         macho_segment_content<P>        segment;
 161 };
 162
 163
 164 //
 165 // mach-o section
 166 //
 167 template <typename P> struct macho_section_content {};
 168 template <> struct macho_section_content<Pointer32<BigEndian> >    { section    fields; };
 169 template <> struct macho_section_content<Pointer64<BigEndian> >    { section_64 fields; };
 170 template <> struct macho_section_content<Pointer32<LittleEndian> > { section    fields; };
 171 template <> struct macho_section_content<Pointer64<LittleEndian> > { section_64 fields; };
 172
 173 template <typename P>
 174 class macho_section {
 175 public:
 176         const char*             sectname() const                                INLINE { return section.fields.sectname; }
 177         void                    set_sectname(const char* value) INLINE { strncpy(section.fields.sectname, value, 16); }
 178
 179         const char*             segname() const                                 INLINE { return section.fields.segname; }
 180         void                    set_segname(const char* value)  INLINE { strncpy(section.fields.segname, value, 16); }
 181
 182         uint64_t                addr() const                                    INLINE { return P::getP(section.fields.addr); }
 183         void                    set_addr(uint64_t value)                INLINE { P::setP(section.fields.addr, value); }
 184
 185         uint64_t                size() const                                    INLINE { return P::getP(section.fields.size); }
 186         void                    set_size(uint64_t value)                INLINE { P::setP(section.fields.size, value); }
 187
 188         uint32_t                offset() const                                  INLINE { return E::get32(section.fields.offset); }
 189         void                    set_offset(uint32_t value)              INLINE { E::set32(section.fields.offset, value); }
 190
 191         uint32_t                align() const                                   INLINE { return E::get32(section.fields.align); }
 192         void                    set_align(uint32_t value)               INLINE { E::set32(section.fields.align, value); }
 193
 194         uint32_t                reloff() const                                  INLINE { return E::get32(section.fields.reloff); }
 195         void                    set_reloff(uint32_t value)              INLINE { E::set32(section.fields.reloff, value); }
 196
 197         uint32_t                nreloc() const                                  INLINE { return E::get32(section.fields.nreloc); }
 198         void                    set_nreloc(uint32_t value)              INLINE { E::set32(section.fields.nreloc, value); }
 199
 200         uint32_t                flags() const                                   INLINE { return E::get32(section.fields.flags); }
 201         void                    set_flags(uint32_t value)               INLINE { E::set32(section.fields.flags, value); }
 202
 203         uint32_t                reserved1() const                               INLINE { return E::get32(section.fields.reserved1); }
 204         void                    set_reserved1(uint32_t value)   INLINE { E::set32(section.fields.reserved1, value); }
 205
 206         uint32_t                reserved2() const                               INLINE { return E::get32(section.fields.reserved2); }
 207         void                    set_reserved2(uint32_t value)   INLINE { E::set32(section.fields.reserved2, value); }
 208
 209         typedef typename P::E           E;
 210 private:
 211         macho_section_content<P>        section;
 212 };
 213
 214
 215 //
 216 // mach-o dylib load command
 217 //
 218 template <typename P>
 219 class macho_dylib_command {
 220 public:
 221         uint32_t                cmd() const                                                                     INLINE { return E::get32(fields.cmd); }
 222         void                    set_cmd(uint32_t value)                                         INLINE { E::set32(fields.cmd, value); }
 223
 224         uint32_t                cmdsize() const                                                         INLINE { return E::get32(fields.cmdsize); }
 225         void                    set_cmdsize(uint32_t value)                                     INLINE { E::set32(fields.cmdsize, value); }
 226
 227         uint32_t                name_offset() const                                                     INLINE { return E::get32(fields.dylib.name.offset); }
 228         void                    set_name_offset(uint32_t value)                         INLINE { E::set32(fields.dylib.name.offset, value);  }
 229
 230         uint32_t                timestamp() const                                                       INLINE { return E::get32(fields.dylib.timestamp); }
 231         void                    set_timestamp(uint32_t value)                           INLINE { E::set32(fields.dylib.timestamp, value); }
 232
 233         uint32_t                current_version() const                                         INLINE { return E::get32(fields.dylib.current_version); }
 234         void                    set_current_version(uint32_t value)                     INLINE { E::set32(fields.dylib.current_version, value); }
 235
 236         uint32_t                compatibility_version() const                           INLINE { return E::get32(fields.dylib.compatibility_version); }
 237         void                    set_compatibility_version(uint32_t value)       INLINE { E::set32(fields.dylib.compatibility_version, value); }
 238
 239         const char*             name() const                                                            INLINE { return (const char*)&fields + name_offset(); }
 240         void                    set_name_offset()                                                       INLINE { set_name_offset(sizeof(fields)); }
 241
 242         typedef typename P::E           E;
 243 private:
 244         dylib_command   fields;
 245 };
 246
 247
 248 //
 249 // mach-o dylinker load command
 250 //
 251 template <typename P>
 252 class macho_dylinker_command {
 253 public:
 254         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 255         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 256
 257         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 258         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 259
 260         uint32_t                name_offset() const                                     INLINE { return E::get32(fields.name.offset); }
 261         void                    set_name_offset(uint32_t value)         INLINE { E::set32(fields.name.offset, value);  }
 262
 263         const char*             name() const                                            INLINE { return (const char*)&fields + name_offset(); }
 264         void                    set_name_offset()                                       INLINE { set_name_offset(sizeof(fields)); }
 265
 266         typedef typename P::E           E;
 267 private:
 268         dylinker_command        fields;
 269 };
 270
 271
 272 //
 273 // mach-o sub_framework load command
 274 //
 275 template <typename P>
 276 class macho_sub_framework_command {
 277 public:
 278         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 279         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 280
 281         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 282         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 283
 284         uint32_t                umbrella_offset() const                         INLINE { return E::get32(fields.umbrella.offset); }
 285         void                    set_umbrella_offset(uint32_t value)     INLINE { E::set32(fields.umbrella.offset, value);  }
 286
 287         const char*             umbrella() const                                        INLINE { return (const char*)&fields + umbrella_offset(); }
 288         void                    set_umbrella_offset()                           INLINE { set_umbrella_offset(sizeof(fields)); }
 289
 290         typedef typename P::E           E;
 291 private:
 292         sub_framework_command   fields;
 293 };
 294
 295
 296 //
 297 // mach-o sub_client load command
 298 //
 299 template <typename P>
 300 class macho_sub_client_command {
 301 public:
 302         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 303         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 304
 305         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 306         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 307
 308         uint32_t                client_offset() const                           INLINE { return E::get32(fields.client.offset); }
 309         void                    set_client_offset(uint32_t value)       INLINE { E::set32(fields.client.offset, value);  }
 310
 311         const char*             client() const                                          INLINE { return (const char*)&fields + client_offset(); }
 312         void                    set_client_offset()                                     INLINE { set_client_offset(sizeof(fields)); }
 313
 314         typedef typename P::E           E;
 315 private:
 316         sub_client_command      fields;
 317 };
 318
 319
 320 //
 321 // mach-o sub_umbrella load command
 322 //
 323 template <typename P>
 324 class macho_sub_umbrella_command {
 325 public:
 326         uint32_t                cmd() const                                                             INLINE { return E::get32(fields.cmd); }
 327         void                    set_cmd(uint32_t value)                                 INLINE { E::set32(fields.cmd, value); }
 328
 329         uint32_t                cmdsize() const                                                 INLINE { return E::get32(fields.cmdsize); }
 330         void                    set_cmdsize(uint32_t value)                             INLINE { E::set32(fields.cmdsize, value); }
 331
 332         uint32_t                sub_umbrella_offset() const                             INLINE { return E::get32(fields.sub_umbrella.offset); }
 333         void                    set_sub_umbrella_offset(uint32_t value) INLINE { E::set32(fields.sub_umbrella.offset, value);  }
 334
 335         const char*             sub_umbrella() const                                    INLINE { return (const char*)&fields + sub_umbrella_offset(); }
 336         void                    set_sub_umbrella_offset()                               INLINE { set_sub_umbrella_offset(sizeof(fields)); }
 337
 338         typedef typename P::E           E;
 339 private:
 340         sub_umbrella_command    fields;
 341 };
 342
 343
 344 //
 345 // mach-o sub_library load command
 346 //
 347 template <typename P>
 348 class macho_sub_library_command {
 349 public:
 350         uint32_t                cmd() const                                                             INLINE { return E::get32(fields.cmd); }
 351         void                    set_cmd(uint32_t value)                                 INLINE { E::set32(fields.cmd, value); }
 352
 353         uint32_t                cmdsize() const                                                 INLINE { return E::get32(fields.cmdsize); }
 354         void                    set_cmdsize(uint32_t value)                             INLINE { E::set32(fields.cmdsize, value); }
 355
 356         uint32_t                sub_library_offset() const                              INLINE { return E::get32(fields.sub_library.offset); }
 357         void                    set_sub_library_offset(uint32_t value)  INLINE { E::set32(fields.sub_library.offset, value);  }
 358
 359         const char*             sub_library() const                                             INLINE { return (const char*)&fields + sub_library_offset(); }
 360         void                    set_sub_library_offset()                                INLINE { set_sub_library_offset(sizeof(fields)); }
 361
 362         typedef typename P::E           E;
 363 private:
 364         sub_library_command     fields;
 365 };
 366
 367
 368 //
 369 // mach-o uuid load command
 370 //
 371 template <typename P>
 372 class macho_uuid_command {
 373 public:
 374         uint32_t                cmd() const                                                             INLINE { return E::get32(fields.cmd); }
 375         void                    set_cmd(uint32_t value)                                 INLINE { E::set32(fields.cmd, value); }
 376
 377         uint32_t                cmdsize() const                                                 INLINE { return E::get32(fields.cmdsize); }
 378         void                    set_cmdsize(uint32_t value)                             INLINE { E::set32(fields.cmdsize, value); }
 379
 380         const uint8_t*  uuid() const                                                    INLINE { return fields.uuid; }
 381         void                    set_uuid(uint8_t value[16])                             INLINE { memcpy(&fields.uuid, value, 16); }
 382
 383         typedef typename P::E           E;
 384 private:
 385         uuid_command    fields;
 386 };
 387
 388
 389 //
 390 // mach-o routines load command
 391 //
 392 template <typename P> struct macho_routines_content {};
 393 template <> struct macho_routines_content<Pointer32<BigEndian> >    { routines_command          fields; enum { CMD = LC_ROUTINES        }; };
 394 template <> struct macho_routines_content<Pointer64<BigEndian> >        { routines_command_64   fields; enum { CMD = LC_ROUTINES_64     }; };
 395 template <> struct macho_routines_content<Pointer32<LittleEndian> > { routines_command          fields; enum { CMD = LC_ROUTINES        }; };
 396 template <> struct macho_routines_content<Pointer64<LittleEndian> > { routines_command_64       fields; enum { CMD = LC_ROUTINES_64     }; };
 397
 398 template <typename P>
 399 class macho_routines_command {
 400 public:
 401         uint32_t                cmd() const                                                     INLINE { return E::get32(routines.fields.cmd); }
 402         void                    set_cmd(uint32_t value)                         INLINE { E::set32(routines.fields.cmd, value); }
 403
 404         uint32_t                cmdsize() const                                         INLINE { return E::get32(routines.fields.cmdsize); }
 405         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(routines.fields.cmdsize, value); }
 406
 407         uint64_t                init_address() const                            INLINE { return P::getP(routines.fields.init_address); }
 408         void                    set_init_address(uint64_t value)        INLINE { P::setP(routines.fields.init_address, value); }
 409
 410         uint64_t                init_module() const                                     INLINE { return P::getP(routines.fields.init_module); }
 411         void                    set_init_module(uint64_t value)         INLINE { P::setP(routines.fields.init_module, value); }
 412
 413         uint64_t                reserved1() const                                       INLINE { return P::getP(routines.fields.reserved1); }
 414         void                    set_reserved1(uint64_t value)           INLINE { P::setP(routines.fields.reserved1, value); }
 415
 416         uint64_t                reserved2() const                                       INLINE { return P::getP(routines.fields.reserved2); }
 417         void                    set_reserved2(uint64_t value)           INLINE { P::setP(routines.fields.reserved2, value); }
 418
 419         uint64_t                reserved3() const                                       INLINE { return P::getP(routines.fields.reserved3); }
 420         void                    set_reserved3(uint64_t value)           INLINE { P::setP(routines.fields.reserved3, value); }
 421
 422         uint64_t                reserved4() const                                       INLINE { return P::getP(routines.fields.reserved4); }
 423         void                    set_reserved4(uint64_t value)           INLINE { P::setP(routines.fields.reserved4, value); }
 424
 425         uint64_t                reserved5() const                                       INLINE { return P::getP(routines.fields.reserved5); }
 426         void                    set_reserved5(uint64_t value)           INLINE { P::setP(routines.fields.reserved5, value); }
 427
 428         uint64_t                reserved6() const                                       INLINE { return P::getP(routines.fields.reserved6); }
 429         void                    set_reserved6(uint64_t value)           INLINE { P::setP(routines.fields.reserved6, value); }
 430
 431         typedef typename P::E           E;
 432         enum {
 433                 CMD = macho_routines_content<P>::CMD
 434         };
 435 private:
 436         macho_routines_content<P>       routines;
 437 };
 438
 439
 440 //
 441 // mach-o symbol table load command
 442 //
 443 template <typename P>
 444 class macho_symtab_command {
 445 public:
 446         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 447         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 448
 449         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 450         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 451
 452         uint32_t                symoff() const                          INLINE { return E::get32(fields.symoff); }
 453         void                    set_symoff(uint32_t value)      INLINE { E::set32(fields.symoff, value);  }
 454
 455         uint32_t                nsyms() const                           INLINE { return E::get32(fields.nsyms); }
 456         void                    set_nsyms(uint32_t value)       INLINE { E::set32(fields.nsyms, value);  }
 457
 458         uint32_t                stroff() const                          INLINE { return E::get32(fields.stroff); }
 459         void                    set_stroff(uint32_t value)      INLINE { E::set32(fields.stroff, value);  }
 460
 461         uint32_t                strsize() const                         INLINE { return E::get32(fields.strsize); }
 462         void                    set_strsize(uint32_t value)     INLINE { E::set32(fields.strsize, value);  }
 463
 464
 465         typedef typename P::E           E;
 466 private:
 467         symtab_command  fields;
 468 };
 469
 470
 471 //
 472 // mach-o dynamic symbol table load command
 473 //
 474 template <typename P>
 475 class macho_dysymtab_command {
 476 public:
 477         uint32_t                cmd() const                                                     INLINE { return E::get32(fields.cmd); }
 478         void                    set_cmd(uint32_t value)                         INLINE { E::set32(fields.cmd, value); }
 479
 480         uint32_t                cmdsize() const                                         INLINE { return E::get32(fields.cmdsize); }
 481         void                    set_cmdsize(uint32_t value)                     INLINE { E::set32(fields.cmdsize, value); }
 482
 483         uint32_t                ilocalsym() const                                       INLINE { return E::get32(fields.ilocalsym); }
 484         void                    set_ilocalsym(uint32_t value)           INLINE { E::set32(fields.ilocalsym, value);  }
 485
 486         uint32_t                nlocalsym() const                                       INLINE { return E::get32(fields.nlocalsym); }
 487         void                    set_nlocalsym(uint32_t value)           INLINE { E::set32(fields.nlocalsym, value);  }
 488
 489         uint32_t                iextdefsym() const                                      INLINE { return E::get32(fields.iextdefsym); }
 490         void                    set_iextdefsym(uint32_t value)          INLINE { E::set32(fields.iextdefsym, value);  }
 491
 492         uint32_t                nextdefsym() const                                      INLINE { return E::get32(fields.nextdefsym); }
 493         void                    set_nextdefsym(uint32_t value)          INLINE { E::set32(fields.nextdefsym, value);  }
 494
 495         uint32_t                iundefsym() const                                       INLINE { return E::get32(fields.iundefsym); }
 496         void                    set_iundefsym(uint32_t value)           INLINE { E::set32(fields.iundefsym, value);  }
 497
 498         uint32_t                nundefsym() const                                       INLINE { return E::get32(fields.nundefsym); }
 499         void                    set_nundefsym(uint32_t value)           INLINE { E::set32(fields.nundefsym, value);  }
 500
 501         uint32_t                tocoff() const                                          INLINE { return E::get32(fields.tocoff); }
 502         void                    set_tocoff(uint32_t value)                      INLINE { E::set32(fields.tocoff, value);  }
 503
 504         uint32_t                ntoc() const                                            INLINE { return E::get32(fields.ntoc); }
 505         void                    set_ntoc(uint32_t value)                        INLINE { E::set32(fields.ntoc, value);  }
 506
 507         uint32_t                modtaboff() const                                       INLINE { return E::get32(fields.modtaboff); }
 508         void                    set_modtaboff(uint32_t value)           INLINE { E::set32(fields.modtaboff, value);  }
 509
 510         uint32_t                nmodtab() const                                         INLINE { return E::get32(fields.nmodtab); }
 511         void                    set_nmodtab(uint32_t value)                     INLINE { E::set32(fields.nmodtab, value);  }
 512
 513         uint32_t                extrefsymoff() const                            INLINE { return E::get32(fields.extrefsymoff); }
 514         void                    set_extrefsymoff(uint32_t value)        INLINE { E::set32(fields.extrefsymoff, value);  }
 515
 516         uint32_t                nextrefsyms() const                                     INLINE { return E::get32(fields.nextrefsyms); }
 517         void                    set_nextrefsyms(uint32_t value)         INLINE { E::set32(fields.nextrefsyms, value);  }
 518
 519         uint32_t                indirectsymoff() const                          INLINE { return E::get32(fields.indirectsymoff); }
 520         void                    set_indirectsymoff(uint32_t value)      INLINE { E::set32(fields.indirectsymoff, value);  }
 521
 522         uint32_t                nindirectsyms() const                           INLINE { return E::get32(fields.nindirectsyms); }
 523         void                    set_nindirectsyms(uint32_t value)       INLINE { E::set32(fields.nindirectsyms, value);  }
 524
 525         uint32_t                extreloff() const                                       INLINE { return E::get32(fields.extreloff); }
 526         void                    set_extreloff(uint32_t value)           INLINE { E::set32(fields.extreloff, value);  }
 527
 528         uint32_t                nextrel() const                                         INLINE { return E::get32(fields.nextrel); }
 529         void                    set_nextrel(uint32_t value)                     INLINE { E::set32(fields.nextrel, value);  }
 530
 531         uint32_t                locreloff() const                                       INLINE { return E::get32(fields.locreloff); }
 532         void                    set_locreloff(uint32_t value)           INLINE { E::set32(fields.locreloff, value);  }
 533
 534         uint32_t                nlocrel() const                                         INLINE { return E::get32(fields.nlocrel); }
 535         void                    set_nlocrel(uint32_t value)                     INLINE { E::set32(fields.nlocrel, value);  }
 536
 537         typedef typename P::E           E;
 538 private:
 539         dysymtab_command        fields;
 540 };
 541
 542
 543 //
 544 // mach-o two-level hints load command
 545 //
 546 template <typename P>
 547 class macho_twolevel_hints_command {
 548 public:
 549         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 550         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 551
 552         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 553         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 554
 555         uint32_t                offset() const                          INLINE { return E::get32(fields.offset); }
 556         void                    set_offset(uint32_t value)      INLINE { E::set32(fields.offset, value);  }
 557
 558         uint32_t                nhints() const                          INLINE { return E::get32(fields.nhints); }
 559         void                    set_nhints(uint32_t value)      INLINE { E::set32(fields.nhints, value);  }
 560
 561         typedef typename P::E           E;
 562 private:
 563         twolevel_hints_command  fields;
 564 };
 565
 566
 567 //
 568 // mach-o threads load command
 569 //
 570 template <typename P>
 571 class macho_thread_command {
 572 public:
 573         uint32_t                cmd() const                                                                                     INLINE { return E::get32(fields.cmd); }
 574         void                    set_cmd(uint32_t value)                                                         INLINE { E::set32(fields.cmd, value); }
 575
 576         uint32_t                cmdsize() const                                                                         INLINE { return E::get32(fields.cmdsize); }
 577         void                    set_cmdsize(uint32_t value)                                                     INLINE { E::set32(fields.cmdsize, value); }
 578
 579         uint32_t                flavor() const                                                                          INLINE { return E::get32(fields_flavor); }
 580         void                    set_flavor(uint32_t value)                                                      INLINE { E::set32(fields_flavor, value);  }
 581
 582         uint32_t                count() const                                                                           INLINE { return E::get32(fields_count); }
 583         void                    set_count(uint32_t value)                                                       INLINE { E::set32(fields_count, value);  }
 584
 585         uint64_t                thread_register(uint32_t index) const                           INLINE { return P::getP(thread_registers[index]); }
 586         void                    set_thread_register(uint32_t index, uint64_t value)     INLINE { P::setP(thread_registers[index], value); }
 587
 588         typedef typename P::E           E;
 589         typedef typename P::uint_t      pint_t;
 590 private:
 591         struct thread_command   fields;
 592         uint32_t                                fields_flavor;
 593         uint32_t                                fields_count;
 594         pint_t                                  thread_registers[1];
 595 };
 596
 597
 598 //
 599 // mach-o misc data
 600 //
 601 template <typename P>
 602 class macho_linkedit_data_command {
 603 public:
 604         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 605         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 606
 607         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 608         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 609
 610         uint32_t                dataoff() const                         INLINE { return E::get32(fields.dataoff); }
 611         void                    set_dataoff(uint32_t value)     INLINE { E::set32(fields.dataoff, value);  }
 612
 613         uint32_t                datasize() const                        INLINE { return E::get32(fields.datasize); }
 614         void                    set_datasize(uint32_t value)INLINE { E::set32(fields.datasize, value);  }
 615
 616
 617         typedef typename P::E           E;
 618 private:
 619         linkedit_data_command   fields;
 620 };
 621
 622
 623 //
 624 // mach-o symbol table entry
 625 //
 626 template <typename P> struct macho_nlist_content {};
 627 template <> struct macho_nlist_content<Pointer32<BigEndian> >    { struct nlist         fields; };
 628 template <> struct macho_nlist_content<Pointer64<BigEndian> >    { struct nlist_64      fields; };
 629 template <> struct macho_nlist_content<Pointer32<LittleEndian> > { struct nlist         fields; };
 630 template <> struct macho_nlist_content<Pointer64<LittleEndian> > { struct nlist_64      fields; };
 631
 632 template <typename P>
 633 class macho_nlist {
 634 public:
 635         uint32_t                n_strx() const                                  INLINE { return E::get32(entry.fields.n_un.n_strx); }
 636         void                    set_n_strx(uint32_t value)              INLINE { E::set32((uint32_t&)entry.fields.n_un.n_strx, value); }
 637
 638         uint8_t                 n_type() const                                  INLINE { return entry.fields.n_type; }
 639         void                    set_n_type(uint8_t value)               INLINE { entry.fields.n_type = value; }
 640
 641         uint8_t                 n_sect() const                                  INLINE { return entry.fields.n_sect; }
 642         void                    set_n_sect(uint8_t value)               INLINE { entry.fields.n_sect = value; }
 643
 644         uint16_t                n_desc() const                                  INLINE { return E::get16(entry.fields.n_desc); }
 645         void                    set_n_desc(uint16_t value)              INLINE { E::set16((uint16_t&)entry.fields.n_desc, value); }
 646
 647         uint64_t                n_value() const                                 INLINE { return P::getP(entry.fields.n_value); }
 648         void                    set_n_value(uint64_t value)             INLINE { P::setP(entry.fields.n_value, value); }
 649
 650         typedef typename P::E           E;
 651 private:
 652         macho_nlist_content<P>  entry;
 653 };
 654
 655
 656
 657 //
 658 // mach-o relocation info
 659 //
 660 template <typename P>
 661 class macho_relocation_info {
 662 public:
 663         uint32_t                r_address() const                               INLINE { return E::get32(address); }
 664         void                    set_r_address(uint32_t value)   INLINE { E::set32(address, value); }
 665
 666         uint32_t                r_symbolnum() const                             INLINE { return E::getBits(other, 0, 24); }
 667         void                    set_r_symbolnum(uint32_t value) INLINE { E::setBits(other, value, 0, 24); }
 668
 669         bool                    r_pcrel() const                                 INLINE { return E::getBits(other, 24, 1); }
 670         void                    set_r_pcrel(bool value)                 INLINE { E::setBits(other, value, 24, 1); }
 671
 672         uint8_t                 r_length() const                                INLINE { return E::getBits(other, 25, 2); }
 673         void                    set_r_length(uint8_t value)             INLINE { E::setBits(other, value, 25, 2); }
 674
 675         bool                    r_extern() const                                INLINE { return E::getBits(other, 27, 1); }
 676         void                    set_r_extern(bool value)                INLINE { E::setBits(other, value, 27, 1); }
 677
 678         uint8_t                 r_type() const                                  INLINE { return E::getBits(other, 28, 4); }
 679         void                    set_r_type(uint8_t value)               INLINE { E::setBits(other, value, 28, 4); }
 680
 681         void                    set_r_length()                                  INLINE { set_r_length((sizeof(typename P::uint_t)==8) ? 3 : 2); }
 682
 683         typedef typename P::E           E;
 684 private:
 685         uint32_t                address;
 686         uint32_t                other;
 687 };
 688
 689
 690 //
 691 // mach-o scattered relocation info
 692 // The bit fields are always in big-endian order (see mach-o/reloc.h)
 693 //
 694 template <typename P>
 695 class macho_scattered_relocation_info {
 696 public:
 697         bool                    r_scattered() const                     INLINE { return BigEndian::getBitsRaw(E::get32(other), 0, 1); }
 698         void                    set_r_scattered(bool x)         INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 0, 1);  E::set32(other, temp); }
 699
 700         bool                    r_pcrel() const                         INLINE { return BigEndian::getBitsRaw(E::get32(other), 1, 1); }
 701         void                    set_r_pcrel(bool x)                     INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 1, 1);  E::set32(other, temp); }
 702
 703         uint8_t                 r_length() const                        INLINE { return BigEndian::getBitsRaw(E::get32(other), 2, 2); }
 704         void                    set_r_length(uint8_t x)         INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 2, 2);  E::set32(other, temp); }
 705
 706         uint8_t                 r_type() const                          INLINE { return BigEndian::getBitsRaw(E::get32(other), 4, 4); }
 707         void                    set_r_type(uint8_t x)           INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 4, 4);  E::set32(other, temp); }
 708
 709         uint32_t                r_address() const                       INLINE { return BigEndian::getBitsRaw(E::get32(other), 8, 24); }
 710         void                    set_r_address(uint32_t x)       INLINE { uint32_t temp = E::get32(other); BigEndian::setBitsRaw(temp, x, 8, 24);  E::set32(other, temp); }
 711
 712         uint32_t                r_value() const                         INLINE { return E::get32(value); }
 713         void                    set_r_value(uint32_t x)         INLINE { E::set32(value, x); }
 714
 715         uint32_t                r_other() const                         INLINE { return other; }
 716
 717         typedef typename P::E           E;
 718 private:
 719         uint32_t                other;
 720         uint32_t                value;
 721 };
 722
 723
 724 //
 725 // mach-o file header
 726 //
 727 template <typename P> struct macho_header_content {};
 728 template <> struct macho_header_content<Pointer32<BigEndian> >    { mach_header         fields; };
 729 template <> struct macho_header_content<Pointer64<BigEndian> >    { mach_header_64      fields; };
 730 template <> struct macho_header_content<Pointer32<LittleEndian> > { mach_header         fields; };
 731 template <> struct macho_header_content<Pointer64<LittleEndian> > { mach_header_64      fields; };
 732
 733 template <typename P>
 734 class macho_header {
 735 public:
 736         uint32_t                magic() const                                   INLINE { return E::get32(header.fields.magic); }
 737         void                    set_magic(uint32_t value)               INLINE { E::set32(header.fields.magic, value); }
 738
 739         uint32_t                cputype() const                                 INLINE { return E::get32(header.fields.cputype); }
 740         void                    set_cputype(uint32_t value)             INLINE { E::set32((uint32_t&)header.fields.cputype, value); }
 741
 742         uint32_t                cpusubtype() const                              INLINE { return E::get32(header.fields.cpusubtype); }
 743         void                    set_cpusubtype(uint32_t value)  INLINE { E::set32((uint32_t&)header.fields.cpusubtype, value); }
 744
 745         uint32_t                filetype() const                                INLINE { return E::get32(header.fields.filetype); }
 746         void                    set_filetype(uint32_t value)    INLINE { E::set32(header.fields.filetype, value); }
 747
 748         uint32_t                ncmds() const                                   INLINE { return E::get32(header.fields.ncmds); }
 749         void                    set_ncmds(uint32_t value)               INLINE { E::set32(header.fields.ncmds, value); }
 750
 751         uint32_t                sizeofcmds() const                              INLINE { return E::get32(header.fields.sizeofcmds); }
 752         void                    set_sizeofcmds(uint32_t value)  INLINE { E::set32(header.fields.sizeofcmds, value); }
 753
 754         uint32_t                flags() const                                   INLINE { return E::get32(header.fields.flags); }
 755         void                    set_flags(uint32_t value)               INLINE { E::set32(header.fields.flags, value); }
 756
 757         uint32_t                reserved() const                                INLINE { return E::get32(header.fields.reserved); }
 758         void                    set_reserved(uint32_t value)    INLINE { E::set32(header.fields.reserved, value); }
 759
 760     const macho_segment_command<P>* getSegment(const char *segname) const
 761     {
 762         const macho_load_command<P>* cmds = (macho_load_command<P>*)((uint8_t*)this + sizeof(macho_header<P>));
 763         uint32_t cmd_count = this->ncmds();
 764         const macho_load_command<P>* cmd = cmds;
 765         for (uint32_t i = 0; i < cmd_count; ++i) {
 766             if ( cmd->cmd() == macho_segment_command<P>::CMD ) {
 767                 const macho_segment_command<P>* segcmd = (macho_segment_command<P>*)cmd;
 768                 if (0 == strncmp(segname, segcmd->segname(), 16)) {
 769                     return segcmd;
 770                 }
 771             }
 772             cmd = (macho_load_command<P>*)(((uint8_t*)cmd)+cmd->cmdsize());
 773         }
 774         return NULL;
 775     }
 776
 777     const macho_section<P>* getSection(const char *segname, const char *sectname) const
 778     {
 779        const  macho_segment_command<P>* segcmd = getSegment(segname);
 780         if (!segcmd) return NULL;
 781
 782         const macho_section<P>* sectcmd = (macho_section<P>*)(segcmd+1);
 783         uint32_t section_count = segcmd->nsects();
 784         for (uint32_t j = 0; j < section_count; ++j) {
 785             if (0 == ::strncmp(sectcmd[j].sectname(), sectname, 16)) {
 786                 return sectcmd+j;
 787             }
 788         }
 789
 790         return NULL;
 791     }
 792
 793         typedef typename P::E           E;
 794 private:
 795         macho_header_content<P> header;
 796 };
 797
 798
 799
 800 //
 801 // compressed dyld info load command
 802 //
 803 template <typename P>
 804 class macho_dyld_info_command {
 805 public:
 806         uint32_t                cmd() const                                     INLINE { return E::get32(fields.cmd); }
 807         void                    set_cmd(uint32_t value)         INLINE { E::set32(fields.cmd, value); }
 808
 809         uint32_t                cmdsize() const                         INLINE { return E::get32(fields.cmdsize); }
 810         void                    set_cmdsize(uint32_t value)     INLINE { E::set32(fields.cmdsize, value); }
 811
 812         uint32_t                rebase_off() const                              INLINE { return E::get32(fields.rebase_off); }
 813         void                    set_rebase_off(uint32_t value)  INLINE { E::set32(fields.rebase_off, value);  }
 814
 815         uint32_t                rebase_size() const                             INLINE { return E::get32(fields.rebase_size); }
 816         void                    set_rebase_size(uint32_t value) INLINE { E::set32(fields.rebase_size, value);  }
 817
 818         uint32_t                bind_off() const                                INLINE { return E::get32(fields.bind_off); }
 819         void                    set_bind_off(uint32_t value)    INLINE { E::set32(fields.bind_off, value);  }
 820
 821         uint32_t                bind_size() const                               INLINE { return E::get32(fields.bind_size); }
 822         void                    set_bind_size(uint32_t value)   INLINE { E::set32(fields.bind_size, value);  }
 823
 824         uint32_t                weak_bind_off() const                           INLINE { return E::get32(fields.weak_bind_off); }
 825         void                    set_weak_bind_off(uint32_t value)       INLINE { E::set32(fields.weak_bind_off, value);  }
 826
 827         uint32_t                weak_bind_size() const                          INLINE { return E::get32(fields.weak_bind_size); }
 828         void                    set_weak_bind_size(uint32_t value)      INLINE { E::set32(fields.weak_bind_size, value);  }
 829
 830         uint32_t                lazy_bind_off() const                           INLINE { return E::get32(fields.lazy_bind_off); }
 831         void                    set_lazy_bind_off(uint32_t value)       INLINE { E::set32(fields.lazy_bind_off, value);  }
 832
 833         uint32_t                lazy_bind_size() const                          INLINE { return E::get32(fields.lazy_bind_size); }
 834         void                    set_lazy_bind_size(uint32_t value)      INLINE { E::set32(fields.lazy_bind_size, value);  }
 835
 836         uint32_t                export_off() const                              INLINE { return E::get32(fields.export_off); }
 837         void                    set_export_off(uint32_t value)  INLINE { E::set32(fields.export_off, value);  }
 838
 839         uint32_t                export_size() const                             INLINE { return E::get32(fields.export_size); }
 840         void                    set_export_size(uint32_t value) INLINE { E::set32(fields.export_size, value);  }
 841
 842
 843         typedef typename P::E           E;
 844 private:
 845         dyld_info_command       fields;
 846 };
 847
 848 #ifndef NO_ULEB
 849 inline uint64_t read_uleb128(const uint8_t*& p, const uint8_t* end) {
 850         uint64_t result = 0;
 851         int              bit = 0;
 852         do {
 853                 if (p == end)
 854                         throw "malformed uleb128 extends beyond trie";
 855
 856                 uint64_t slice = *p & 0x7f;
 857
 858                 if (bit >= 64 || slice << bit >> bit != slice)
 859                         throw "uleb128 too big for 64-bits";
 860                 else {
 861                         result |= (slice << bit);
 862                         bit += 7;
 863                 }
 864         }
 865         while (*p++ & 0x80);
 866         return result;
 867 }
 868
 869
 870 static int64_t read_sleb128(const uint8_t*& p, const uint8_t* end)
 871 {
 872         int64_t result = 0;
 873         int bit = 0;
 874         uint8_t byte;
 875         do {
 876                 if (p == end)
 877                         throw "malformed sleb128";
 878                 byte = *p++;
 879                 result |= ((byte & 0x7f) << bit);
 880                 bit += 7;
 881         } while (byte & 0x80);
 882         // sign extend negative numbers
 883         if ( (byte & 0x40) != 0 )
 884                 result |= (-1LL) << bit;
 885         return result;
 886 }
 887
 888 #endif
 889
 890
 891 #endif  // __MACH_O_FILE_ABSTRACTION__
 892
 893