1 //===- MachOObjectFile.cpp - Mach-O object file binding ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the MachOObjectFile class, which binds the MachOObject
11 // class to the generic ObjectFile wrapper.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Object/MachO.h"
16 #include "llvm/ADT/STLExtras.h"
17 #include "llvm/ADT/StringSwitch.h"
18 #include "llvm/ADT/Triple.h"
19 #include "llvm/Support/DataExtractor.h"
20 #include "llvm/Support/Debug.h"
21 #include "llvm/Support/Format.h"
22 #include "llvm/Support/Host.h"
23 #include "llvm/Support/LEB128.h"
24 #include "llvm/Support/MachO.h"
25 #include "llvm/Support/MemoryBuffer.h"
26 #include "llvm/Support/raw_ostream.h"
32 using namespace object;
41 // FIXME: Replace all uses of this function with getStructOrErr.
43 static T getStruct(const MachOObjectFile *O, const char *P) {
44 // Don't read before the beginning or past the end of the file
45 if (P < O->getData().begin() || P + sizeof(T) > O->getData().end())
46 report_fatal_error("Malformed MachO file.");
49 memcpy(&Cmd, P, sizeof(T));
50 if (O->isLittleEndian() != sys::IsLittleEndianHost)
51 MachO::swapStruct(Cmd);
56 static ErrorOr<T> getStructOrErr(const MachOObjectFile *O, const char *P) {
57 // Don't read before the beginning or past the end of the file
58 if (P < O->getData().begin() || P + sizeof(T) > O->getData().end())
59 return object_error::parse_failed;
62 memcpy(&Cmd, P, sizeof(T));
63 if (O->isLittleEndian() != sys::IsLittleEndianHost)
64 MachO::swapStruct(Cmd);
69 getSectionPtr(const MachOObjectFile *O, MachOObjectFile::LoadCommandInfo L,
71 uintptr_t CommandAddr = reinterpret_cast<uintptr_t>(L.Ptr);
73 bool Is64 = O->is64Bit();
74 unsigned SegmentLoadSize = Is64 ? sizeof(MachO::segment_command_64) :
75 sizeof(MachO::segment_command);
76 unsigned SectionSize = Is64 ? sizeof(MachO::section_64) :
77 sizeof(MachO::section);
79 uintptr_t SectionAddr = CommandAddr + SegmentLoadSize + Sec * SectionSize;
80 return reinterpret_cast<const char*>(SectionAddr);
83 static const char *getPtr(const MachOObjectFile *O, size_t Offset) {
84 return O->getData().substr(Offset, 1).data();
87 static MachO::nlist_base
88 getSymbolTableEntryBase(const MachOObjectFile *O, DataRefImpl DRI) {
89 const char *P = reinterpret_cast<const char *>(DRI.p);
90 return getStruct<MachO::nlist_base>(O, P);
93 static StringRef parseSegmentOrSectionName(const char *P) {
97 // Not null terminated, so this is a 16 char string.
98 return StringRef(P, 16);
101 // Helper to advance a section or symbol iterator multiple increments at a time.
103 static void advance(T &it, size_t Val) {
108 static unsigned getCPUType(const MachOObjectFile *O) {
109 return O->getHeader().cputype;
113 getPlainRelocationAddress(const MachO::any_relocation_info &RE) {
118 getScatteredRelocationAddress(const MachO::any_relocation_info &RE) {
119 return RE.r_word0 & 0xffffff;
122 static bool getPlainRelocationPCRel(const MachOObjectFile *O,
123 const MachO::any_relocation_info &RE) {
124 if (O->isLittleEndian())
125 return (RE.r_word1 >> 24) & 1;
126 return (RE.r_word1 >> 7) & 1;
130 getScatteredRelocationPCRel(const MachOObjectFile *O,
131 const MachO::any_relocation_info &RE) {
132 return (RE.r_word0 >> 30) & 1;
135 static unsigned getPlainRelocationLength(const MachOObjectFile *O,
136 const MachO::any_relocation_info &RE) {
137 if (O->isLittleEndian())
138 return (RE.r_word1 >> 25) & 3;
139 return (RE.r_word1 >> 5) & 3;
143 getScatteredRelocationLength(const MachO::any_relocation_info &RE) {
144 return (RE.r_word0 >> 28) & 3;
147 static unsigned getPlainRelocationType(const MachOObjectFile *O,
148 const MachO::any_relocation_info &RE) {
149 if (O->isLittleEndian())
150 return RE.r_word1 >> 28;
151 return RE.r_word1 & 0xf;
154 static uint32_t getSectionFlags(const MachOObjectFile *O,
157 MachO::section_64 Sect = O->getSection64(Sec);
160 MachO::section Sect = O->getSection(Sec);
164 static ErrorOr<MachOObjectFile::LoadCommandInfo>
165 getLoadCommandInfo(const MachOObjectFile *Obj, const char *Ptr) {
166 auto CmdOrErr = getStructOrErr<MachO::load_command>(Obj, Ptr);
168 return CmdOrErr.getError();
169 if (CmdOrErr->cmdsize < 8)
170 return object_error::macho_small_load_command;
171 MachOObjectFile::LoadCommandInfo Load;
173 Load.C = CmdOrErr.get();
177 static ErrorOr<MachOObjectFile::LoadCommandInfo>
178 getFirstLoadCommandInfo(const MachOObjectFile *Obj) {
179 unsigned HeaderSize = Obj->is64Bit() ? sizeof(MachO::mach_header_64)
180 : sizeof(MachO::mach_header);
181 return getLoadCommandInfo(Obj, getPtr(Obj, HeaderSize));
184 static ErrorOr<MachOObjectFile::LoadCommandInfo>
185 getNextLoadCommandInfo(const MachOObjectFile *Obj,
186 const MachOObjectFile::LoadCommandInfo &L) {
187 return getLoadCommandInfo(Obj, L.Ptr + L.C.cmdsize);
190 template <typename T>
191 static void parseHeader(const MachOObjectFile *Obj, T &Header,
192 std::error_code &EC) {
193 auto HeaderOrErr = getStructOrErr<T>(Obj, getPtr(Obj, 0));
195 Header = HeaderOrErr.get();
197 EC = HeaderOrErr.getError();
200 // Parses LC_SEGMENT or LC_SEGMENT_64 load command, adds addresses of all
201 // sections to \param Sections, and optionally sets
202 // \param IsPageZeroSegment to true.
203 template <typename SegmentCmd>
204 static std::error_code parseSegmentLoadCommand(
205 const MachOObjectFile *Obj, const MachOObjectFile::LoadCommandInfo &Load,
206 SmallVectorImpl<const char *> &Sections, bool &IsPageZeroSegment) {
207 const unsigned SegmentLoadSize = sizeof(SegmentCmd);
208 if (Load.C.cmdsize < SegmentLoadSize)
209 return object_error::macho_load_segment_too_small;
210 auto SegOrErr = getStructOrErr<SegmentCmd>(Obj, Load.Ptr);
212 return SegOrErr.getError();
213 SegmentCmd S = SegOrErr.get();
214 const unsigned SectionSize =
215 Obj->is64Bit() ? sizeof(MachO::section_64) : sizeof(MachO::section);
216 if (S.nsects > std::numeric_limits<uint32_t>::max() / SectionSize ||
217 S.nsects * SectionSize > Load.C.cmdsize - SegmentLoadSize)
218 return object_error::macho_load_segment_too_many_sections;
219 for (unsigned J = 0; J < S.nsects; ++J) {
220 const char *Sec = getSectionPtr(Obj, Load, J);
221 Sections.push_back(Sec);
223 IsPageZeroSegment |= StringRef("__PAGEZERO").equals(S.segname);
224 return std::error_code();
227 MachOObjectFile::MachOObjectFile(MemoryBufferRef Object, bool IsLittleEndian,
228 bool Is64bits, std::error_code &EC)
229 : ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object),
230 SymtabLoadCmd(nullptr), DysymtabLoadCmd(nullptr),
231 DataInCodeLoadCmd(nullptr), LinkOptHintsLoadCmd(nullptr),
232 DyldInfoLoadCmd(nullptr), UuidLoadCmd(nullptr),
233 HasPageZeroSegment(false) {
235 parseHeader(this, Header64, EC);
237 parseHeader(this, Header, EC);
241 uint32_t LoadCommandCount = getHeader().ncmds;
242 if (LoadCommandCount == 0)
245 auto LoadOrErr = getFirstLoadCommandInfo(this);
247 EC = LoadOrErr.getError();
250 LoadCommandInfo Load = LoadOrErr.get();
251 for (unsigned I = 0; I < LoadCommandCount; ++I) {
252 LoadCommands.push_back(Load);
253 if (Load.C.cmd == MachO::LC_SYMTAB) {
254 // Multiple symbol tables
256 EC = object_error::parse_failed;
259 SymtabLoadCmd = Load.Ptr;
260 } else if (Load.C.cmd == MachO::LC_DYSYMTAB) {
261 // Multiple dynamic symbol tables
262 if (DysymtabLoadCmd) {
263 EC = object_error::parse_failed;
266 DysymtabLoadCmd = Load.Ptr;
267 } else if (Load.C.cmd == MachO::LC_DATA_IN_CODE) {
268 // Multiple data in code tables
269 if (DataInCodeLoadCmd) {
270 EC = object_error::parse_failed;
273 DataInCodeLoadCmd = Load.Ptr;
274 } else if (Load.C.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT) {
275 // Multiple linker optimization hint tables
276 if (LinkOptHintsLoadCmd) {
277 EC = object_error::parse_failed;
280 LinkOptHintsLoadCmd = Load.Ptr;
281 } else if (Load.C.cmd == MachO::LC_DYLD_INFO ||
282 Load.C.cmd == MachO::LC_DYLD_INFO_ONLY) {
283 // Multiple dyldinfo load commands
284 if (DyldInfoLoadCmd) {
285 EC = object_error::parse_failed;
288 DyldInfoLoadCmd = Load.Ptr;
289 } else if (Load.C.cmd == MachO::LC_UUID) {
290 // Multiple UUID load commands
292 EC = object_error::parse_failed;
295 UuidLoadCmd = Load.Ptr;
296 } else if (Load.C.cmd == MachO::LC_SEGMENT_64) {
297 if ((EC = parseSegmentLoadCommand<MachO::segment_command_64>(
298 this, Load, Sections, HasPageZeroSegment)))
300 } else if (Load.C.cmd == MachO::LC_SEGMENT) {
301 if ((EC = parseSegmentLoadCommand<MachO::segment_command>(
302 this, Load, Sections, HasPageZeroSegment)))
304 } else if (Load.C.cmd == MachO::LC_LOAD_DYLIB ||
305 Load.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||
306 Load.C.cmd == MachO::LC_LAZY_LOAD_DYLIB ||
307 Load.C.cmd == MachO::LC_REEXPORT_DYLIB ||
308 Load.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
309 Libraries.push_back(Load.Ptr);
311 if (I < LoadCommandCount - 1) {
312 auto LoadOrErr = getNextLoadCommandInfo(this, Load);
314 EC = LoadOrErr.getError();
317 Load = LoadOrErr.get();
320 assert(LoadCommands.size() == LoadCommandCount);
323 void MachOObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
324 unsigned SymbolTableEntrySize = is64Bit() ?
325 sizeof(MachO::nlist_64) :
326 sizeof(MachO::nlist);
327 Symb.p += SymbolTableEntrySize;
330 ErrorOr<StringRef> MachOObjectFile::getSymbolName(DataRefImpl Symb) const {
331 StringRef StringTable = getStringTableData();
332 MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
333 const char *Start = &StringTable.data()[Entry.n_strx];
334 if (Start < getData().begin() || Start >= getData().end())
336 "Symbol name entry points before beginning or past end of file.");
337 return StringRef(Start);
340 unsigned MachOObjectFile::getSectionType(SectionRef Sec) const {
341 DataRefImpl DRI = Sec.getRawDataRefImpl();
342 uint32_t Flags = getSectionFlags(this, DRI);
343 return Flags & MachO::SECTION_TYPE;
346 uint64_t MachOObjectFile::getNValue(DataRefImpl Sym) const {
348 MachO::nlist_64 Entry = getSymbol64TableEntry(Sym);
349 return Entry.n_value;
351 MachO::nlist Entry = getSymbolTableEntry(Sym);
352 return Entry.n_value;
355 // getIndirectName() returns the name of the alias'ed symbol who's string table
356 // index is in the n_value field.
357 std::error_code MachOObjectFile::getIndirectName(DataRefImpl Symb,
358 StringRef &Res) const {
359 StringRef StringTable = getStringTableData();
360 MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
361 if ((Entry.n_type & MachO::N_TYPE) != MachO::N_INDR)
362 return object_error::parse_failed;
363 uint64_t NValue = getNValue(Symb);
364 if (NValue >= StringTable.size())
365 return object_error::parse_failed;
366 const char *Start = &StringTable.data()[NValue];
367 Res = StringRef(Start);
368 return std::error_code();
371 uint64_t MachOObjectFile::getSymbolValueImpl(DataRefImpl Sym) const {
372 return getNValue(Sym);
375 ErrorOr<uint64_t> MachOObjectFile::getSymbolAddress(DataRefImpl Sym) const {
376 return getSymbolValue(Sym);
379 uint32_t MachOObjectFile::getSymbolAlignment(DataRefImpl DRI) const {
380 uint32_t flags = getSymbolFlags(DRI);
381 if (flags & SymbolRef::SF_Common) {
382 MachO::nlist_base Entry = getSymbolTableEntryBase(this, DRI);
383 return 1 << MachO::GET_COMM_ALIGN(Entry.n_desc);
388 uint64_t MachOObjectFile::getCommonSymbolSizeImpl(DataRefImpl DRI) const {
389 return getNValue(DRI);
392 SymbolRef::Type MachOObjectFile::getSymbolType(DataRefImpl Symb) const {
393 MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
394 uint8_t n_type = Entry.n_type;
396 // If this is a STAB debugging symbol, we can do nothing more.
397 if (n_type & MachO::N_STAB)
398 return SymbolRef::ST_Debug;
400 switch (n_type & MachO::N_TYPE) {
402 return SymbolRef::ST_Unknown;
404 return SymbolRef::ST_Function;
406 return SymbolRef::ST_Other;
409 uint32_t MachOObjectFile::getSymbolFlags(DataRefImpl DRI) const {
410 MachO::nlist_base Entry = getSymbolTableEntryBase(this, DRI);
412 uint8_t MachOType = Entry.n_type;
413 uint16_t MachOFlags = Entry.n_desc;
415 uint32_t Result = SymbolRef::SF_None;
417 if ((MachOType & MachO::N_TYPE) == MachO::N_INDR)
418 Result |= SymbolRef::SF_Indirect;
420 if (MachOType & MachO::N_STAB)
421 Result |= SymbolRef::SF_FormatSpecific;
423 if (MachOType & MachO::N_EXT) {
424 Result |= SymbolRef::SF_Global;
425 if ((MachOType & MachO::N_TYPE) == MachO::N_UNDF) {
427 Result |= SymbolRef::SF_Common;
429 Result |= SymbolRef::SF_Undefined;
432 if (!(MachOType & MachO::N_PEXT))
433 Result |= SymbolRef::SF_Exported;
436 if (MachOFlags & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
437 Result |= SymbolRef::SF_Weak;
439 if (MachOFlags & (MachO::N_ARM_THUMB_DEF))
440 Result |= SymbolRef::SF_Thumb;
442 if ((MachOType & MachO::N_TYPE) == MachO::N_ABS)
443 Result |= SymbolRef::SF_Absolute;
448 ErrorOr<section_iterator>
449 MachOObjectFile::getSymbolSection(DataRefImpl Symb) const {
450 MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
451 uint8_t index = Entry.n_sect;
454 return section_end();
457 if (DRI.d.a >= Sections.size())
458 report_fatal_error("getSymbolSection: Invalid section index.");
459 return section_iterator(SectionRef(DRI, this));
462 unsigned MachOObjectFile::getSymbolSectionID(SymbolRef Sym) const {
463 MachO::nlist_base Entry =
464 getSymbolTableEntryBase(this, Sym.getRawDataRefImpl());
465 return Entry.n_sect - 1;
468 void MachOObjectFile::moveSectionNext(DataRefImpl &Sec) const {
472 std::error_code MachOObjectFile::getSectionName(DataRefImpl Sec,
473 StringRef &Result) const {
474 ArrayRef<char> Raw = getSectionRawName(Sec);
475 Result = parseSegmentOrSectionName(Raw.data());
476 return std::error_code();
479 uint64_t MachOObjectFile::getSectionAddress(DataRefImpl Sec) const {
481 return getSection64(Sec).addr;
482 return getSection(Sec).addr;
485 uint64_t MachOObjectFile::getSectionSize(DataRefImpl Sec) const {
487 return getSection64(Sec).size;
488 return getSection(Sec).size;
491 std::error_code MachOObjectFile::getSectionContents(DataRefImpl Sec,
492 StringRef &Res) const {
497 MachO::section_64 Sect = getSection64(Sec);
498 Offset = Sect.offset;
501 MachO::section Sect = getSection(Sec);
502 Offset = Sect.offset;
506 Res = this->getData().substr(Offset, Size);
507 return std::error_code();
510 uint64_t MachOObjectFile::getSectionAlignment(DataRefImpl Sec) const {
513 MachO::section_64 Sect = getSection64(Sec);
516 MachO::section Sect = getSection(Sec);
520 return uint64_t(1) << Align;
523 bool MachOObjectFile::isSectionText(DataRefImpl Sec) const {
524 uint32_t Flags = getSectionFlags(this, Sec);
525 return Flags & MachO::S_ATTR_PURE_INSTRUCTIONS;
528 bool MachOObjectFile::isSectionData(DataRefImpl Sec) const {
529 uint32_t Flags = getSectionFlags(this, Sec);
530 unsigned SectionType = Flags & MachO::SECTION_TYPE;
531 return !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
532 !(SectionType == MachO::S_ZEROFILL ||
533 SectionType == MachO::S_GB_ZEROFILL);
536 bool MachOObjectFile::isSectionBSS(DataRefImpl Sec) const {
537 uint32_t Flags = getSectionFlags(this, Sec);
538 unsigned SectionType = Flags & MachO::SECTION_TYPE;
539 return !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
540 (SectionType == MachO::S_ZEROFILL ||
541 SectionType == MachO::S_GB_ZEROFILL);
544 unsigned MachOObjectFile::getSectionID(SectionRef Sec) const {
545 return Sec.getRawDataRefImpl().d.a;
548 bool MachOObjectFile::isSectionVirtual(DataRefImpl Sec) const {
549 // FIXME: Unimplemented.
553 relocation_iterator MachOObjectFile::section_rel_begin(DataRefImpl Sec) const {
557 return relocation_iterator(RelocationRef(Ret, this));
561 MachOObjectFile::section_rel_end(DataRefImpl Sec) const {
564 MachO::section_64 Sect = getSection64(Sec);
567 MachO::section Sect = getSection(Sec);
574 return relocation_iterator(RelocationRef(Ret, this));
577 void MachOObjectFile::moveRelocationNext(DataRefImpl &Rel) const {
581 uint64_t MachOObjectFile::getRelocationOffset(DataRefImpl Rel) const {
582 assert(getHeader().filetype == MachO::MH_OBJECT &&
583 "Only implemented for MH_OBJECT");
584 MachO::any_relocation_info RE = getRelocation(Rel);
585 return getAnyRelocationAddress(RE);
589 MachOObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
590 MachO::any_relocation_info RE = getRelocation(Rel);
591 if (isRelocationScattered(RE))
594 uint32_t SymbolIdx = getPlainRelocationSymbolNum(RE);
595 bool isExtern = getPlainRelocationExternal(RE);
599 MachO::symtab_command S = getSymtabLoadCommand();
600 unsigned SymbolTableEntrySize = is64Bit() ?
601 sizeof(MachO::nlist_64) :
602 sizeof(MachO::nlist);
603 uint64_t Offset = S.symoff + SymbolIdx * SymbolTableEntrySize;
605 Sym.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
606 return symbol_iterator(SymbolRef(Sym, this));
610 MachOObjectFile::getRelocationSection(DataRefImpl Rel) const {
611 return section_iterator(getAnyRelocationSection(getRelocation(Rel)));
614 uint64_t MachOObjectFile::getRelocationType(DataRefImpl Rel) const {
615 MachO::any_relocation_info RE = getRelocation(Rel);
616 return getAnyRelocationType(RE);
619 void MachOObjectFile::getRelocationTypeName(
620 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
622 uint64_t RType = getRelocationType(Rel);
624 unsigned Arch = this->getArch();
628 static const char *const Table[] = {
629 "GENERIC_RELOC_VANILLA",
630 "GENERIC_RELOC_PAIR",
631 "GENERIC_RELOC_SECTDIFF",
632 "GENERIC_RELOC_PB_LA_PTR",
633 "GENERIC_RELOC_LOCAL_SECTDIFF",
634 "GENERIC_RELOC_TLV" };
642 case Triple::x86_64: {
643 static const char *const Table[] = {
644 "X86_64_RELOC_UNSIGNED",
645 "X86_64_RELOC_SIGNED",
646 "X86_64_RELOC_BRANCH",
647 "X86_64_RELOC_GOT_LOAD",
649 "X86_64_RELOC_SUBTRACTOR",
650 "X86_64_RELOC_SIGNED_1",
651 "X86_64_RELOC_SIGNED_2",
652 "X86_64_RELOC_SIGNED_4",
653 "X86_64_RELOC_TLV" };
662 static const char *const Table[] = {
665 "ARM_RELOC_SECTDIFF",
666 "ARM_RELOC_LOCAL_SECTDIFF",
667 "ARM_RELOC_PB_LA_PTR",
669 "ARM_THUMB_RELOC_BR22",
670 "ARM_THUMB_32BIT_BRANCH",
672 "ARM_RELOC_HALF_SECTDIFF" };
680 case Triple::aarch64: {
681 static const char *const Table[] = {
682 "ARM64_RELOC_UNSIGNED", "ARM64_RELOC_SUBTRACTOR",
683 "ARM64_RELOC_BRANCH26", "ARM64_RELOC_PAGE21",
684 "ARM64_RELOC_PAGEOFF12", "ARM64_RELOC_GOT_LOAD_PAGE21",
685 "ARM64_RELOC_GOT_LOAD_PAGEOFF12", "ARM64_RELOC_POINTER_TO_GOT",
686 "ARM64_RELOC_TLVP_LOAD_PAGE21", "ARM64_RELOC_TLVP_LOAD_PAGEOFF12",
690 if (RType >= array_lengthof(Table))
697 static const char *const Table[] = {
706 "PPC_RELOC_SECTDIFF",
707 "PPC_RELOC_PB_LA_PTR",
708 "PPC_RELOC_HI16_SECTDIFF",
709 "PPC_RELOC_LO16_SECTDIFF",
710 "PPC_RELOC_HA16_SECTDIFF",
712 "PPC_RELOC_LO14_SECTDIFF",
713 "PPC_RELOC_LOCAL_SECTDIFF" };
721 case Triple::UnknownArch:
725 Result.append(res.begin(), res.end());
728 uint8_t MachOObjectFile::getRelocationLength(DataRefImpl Rel) const {
729 MachO::any_relocation_info RE = getRelocation(Rel);
730 return getAnyRelocationLength(RE);
734 // guessLibraryShortName() is passed a name of a dynamic library and returns a
735 // guess on what the short name is. Then name is returned as a substring of the
736 // StringRef Name passed in. The name of the dynamic library is recognized as
737 // a framework if it has one of the two following forms:
738 // Foo.framework/Versions/A/Foo
740 // Where A and Foo can be any string. And may contain a trailing suffix
741 // starting with an underbar. If the Name is recognized as a framework then
742 // isFramework is set to true else it is set to false. If the Name has a
743 // suffix then Suffix is set to the substring in Name that contains the suffix
744 // else it is set to a NULL StringRef.
746 // The Name of the dynamic library is recognized as a library name if it has
747 // one of the two following forms:
750 // The library may have a suffix trailing the name Foo of the form:
751 // libFoo_profile.A.dylib
752 // libFoo_profile.dylib
754 // The Name of the dynamic library is also recognized as a library name if it
755 // has the following form:
758 // If the Name of the dynamic library is none of the forms above then a NULL
759 // StringRef is returned.
761 StringRef MachOObjectFile::guessLibraryShortName(StringRef Name,
764 StringRef Foo, F, DotFramework, V, Dylib, Lib, Dot, Qtx;
765 size_t a, b, c, d, Idx;
768 Suffix = StringRef();
770 // Pull off the last component and make Foo point to it
772 if (a == Name.npos || a == 0)
774 Foo = Name.slice(a+1, Name.npos);
776 // Look for a suffix starting with a '_'
777 Idx = Foo.rfind('_');
778 if (Idx != Foo.npos && Foo.size() >= 2) {
779 Suffix = Foo.slice(Idx, Foo.npos);
780 Foo = Foo.slice(0, Idx);
783 // First look for the form Foo.framework/Foo
784 b = Name.rfind('/', a);
789 F = Name.slice(Idx, Idx + Foo.size());
790 DotFramework = Name.slice(Idx + Foo.size(),
791 Idx + Foo.size() + sizeof(".framework/")-1);
792 if (F == Foo && DotFramework == ".framework/") {
797 // Next look for the form Foo.framework/Versions/A/Foo
800 c = Name.rfind('/', b);
801 if (c == Name.npos || c == 0)
803 V = Name.slice(c+1, Name.npos);
804 if (!V.startswith("Versions/"))
806 d = Name.rfind('/', c);
811 F = Name.slice(Idx, Idx + Foo.size());
812 DotFramework = Name.slice(Idx + Foo.size(),
813 Idx + Foo.size() + sizeof(".framework/")-1);
814 if (F == Foo && DotFramework == ".framework/") {
820 // pull off the suffix after the "." and make a point to it
822 if (a == Name.npos || a == 0)
824 Dylib = Name.slice(a, Name.npos);
825 if (Dylib != ".dylib")
828 // First pull off the version letter for the form Foo.A.dylib if any.
830 Dot = Name.slice(a-2, a-1);
835 b = Name.rfind('/', a);
840 // ignore any suffix after an underbar like Foo_profile.A.dylib
841 Idx = Name.find('_', b);
842 if (Idx != Name.npos && Idx != b) {
843 Lib = Name.slice(b, Idx);
844 Suffix = Name.slice(Idx, a);
847 Lib = Name.slice(b, a);
848 // There are incorrect library names of the form:
849 // libATS.A_profile.dylib so check for these.
850 if (Lib.size() >= 3) {
851 Dot = Lib.slice(Lib.size()-2, Lib.size()-1);
853 Lib = Lib.slice(0, Lib.size()-2);
858 Qtx = Name.slice(a, Name.npos);
861 b = Name.rfind('/', a);
863 Lib = Name.slice(0, a);
865 Lib = Name.slice(b+1, a);
866 // There are library names of the form: QT.A.qtx so check for these.
867 if (Lib.size() >= 3) {
868 Dot = Lib.slice(Lib.size()-2, Lib.size()-1);
870 Lib = Lib.slice(0, Lib.size()-2);
875 // getLibraryShortNameByIndex() is used to get the short name of the library
876 // for an undefined symbol in a linked Mach-O binary that was linked with the
877 // normal two-level namespace default (that is MH_TWOLEVEL in the header).
878 // It is passed the index (0 - based) of the library as translated from
879 // GET_LIBRARY_ORDINAL (1 - based).
880 std::error_code MachOObjectFile::getLibraryShortNameByIndex(unsigned Index,
881 StringRef &Res) const {
882 if (Index >= Libraries.size())
883 return object_error::parse_failed;
885 // If the cache of LibrariesShortNames is not built up do that first for
886 // all the Libraries.
887 if (LibrariesShortNames.size() == 0) {
888 for (unsigned i = 0; i < Libraries.size(); i++) {
889 MachO::dylib_command D =
890 getStruct<MachO::dylib_command>(this, Libraries[i]);
891 if (D.dylib.name >= D.cmdsize)
892 return object_error::parse_failed;
893 const char *P = (const char *)(Libraries[i]) + D.dylib.name;
894 StringRef Name = StringRef(P);
895 if (D.dylib.name+Name.size() >= D.cmdsize)
896 return object_error::parse_failed;
899 StringRef shortName = guessLibraryShortName(Name, isFramework, Suffix);
900 if (shortName.empty())
901 LibrariesShortNames.push_back(Name);
903 LibrariesShortNames.push_back(shortName);
907 Res = LibrariesShortNames[Index];
908 return std::error_code();
912 MachOObjectFile::getRelocationRelocatedSection(relocation_iterator Rel) const {
914 Sec.d.a = Rel->getRawDataRefImpl().d.a;
915 return section_iterator(SectionRef(Sec, this));
918 basic_symbol_iterator MachOObjectFile::symbol_begin_impl() const {
919 return getSymbolByIndex(0);
922 basic_symbol_iterator MachOObjectFile::symbol_end_impl() const {
925 return basic_symbol_iterator(SymbolRef(DRI, this));
927 MachO::symtab_command Symtab = getSymtabLoadCommand();
928 unsigned SymbolTableEntrySize = is64Bit() ?
929 sizeof(MachO::nlist_64) :
930 sizeof(MachO::nlist);
931 unsigned Offset = Symtab.symoff +
932 Symtab.nsyms * SymbolTableEntrySize;
933 DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
934 return basic_symbol_iterator(SymbolRef(DRI, this));
937 basic_symbol_iterator MachOObjectFile::getSymbolByIndex(unsigned Index) const {
940 return basic_symbol_iterator(SymbolRef(DRI, this));
942 MachO::symtab_command Symtab = getSymtabLoadCommand();
943 if (Index >= Symtab.nsyms)
944 report_fatal_error("Requested symbol index is out of range.");
945 unsigned SymbolTableEntrySize =
946 is64Bit() ? sizeof(MachO::nlist_64) : sizeof(MachO::nlist);
947 DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Symtab.symoff));
948 DRI.p += Index * SymbolTableEntrySize;
949 return basic_symbol_iterator(SymbolRef(DRI, this));
952 section_iterator MachOObjectFile::section_begin() const {
954 return section_iterator(SectionRef(DRI, this));
957 section_iterator MachOObjectFile::section_end() const {
959 DRI.d.a = Sections.size();
960 return section_iterator(SectionRef(DRI, this));
963 uint8_t MachOObjectFile::getBytesInAddress() const {
964 return is64Bit() ? 8 : 4;
967 StringRef MachOObjectFile::getFileFormatName() const {
968 unsigned CPUType = getCPUType(this);
971 case llvm::MachO::CPU_TYPE_I386:
972 return "Mach-O 32-bit i386";
973 case llvm::MachO::CPU_TYPE_ARM:
975 case llvm::MachO::CPU_TYPE_POWERPC:
976 return "Mach-O 32-bit ppc";
978 return "Mach-O 32-bit unknown";
983 case llvm::MachO::CPU_TYPE_X86_64:
984 return "Mach-O 64-bit x86-64";
985 case llvm::MachO::CPU_TYPE_ARM64:
986 return "Mach-O arm64";
987 case llvm::MachO::CPU_TYPE_POWERPC64:
988 return "Mach-O 64-bit ppc64";
990 return "Mach-O 64-bit unknown";
994 Triple::ArchType MachOObjectFile::getArch(uint32_t CPUType) {
996 case llvm::MachO::CPU_TYPE_I386:
998 case llvm::MachO::CPU_TYPE_X86_64:
999 return Triple::x86_64;
1000 case llvm::MachO::CPU_TYPE_ARM:
1002 case llvm::MachO::CPU_TYPE_ARM64:
1003 return Triple::aarch64;
1004 case llvm::MachO::CPU_TYPE_POWERPC:
1006 case llvm::MachO::CPU_TYPE_POWERPC64:
1007 return Triple::ppc64;
1009 return Triple::UnknownArch;
1013 Triple MachOObjectFile::getArch(uint32_t CPUType, uint32_t CPUSubType,
1014 const char **McpuDefault) {
1016 *McpuDefault = nullptr;
1019 case MachO::CPU_TYPE_I386:
1020 switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
1021 case MachO::CPU_SUBTYPE_I386_ALL:
1022 return Triple("i386-apple-darwin");
1026 case MachO::CPU_TYPE_X86_64:
1027 switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
1028 case MachO::CPU_SUBTYPE_X86_64_ALL:
1029 return Triple("x86_64-apple-darwin");
1030 case MachO::CPU_SUBTYPE_X86_64_H:
1031 return Triple("x86_64h-apple-darwin");
1035 case MachO::CPU_TYPE_ARM:
1036 switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
1037 case MachO::CPU_SUBTYPE_ARM_V4T:
1038 return Triple("armv4t-apple-darwin");
1039 case MachO::CPU_SUBTYPE_ARM_V5TEJ:
1040 return Triple("armv5e-apple-darwin");
1041 case MachO::CPU_SUBTYPE_ARM_XSCALE:
1042 return Triple("xscale-apple-darwin");
1043 case MachO::CPU_SUBTYPE_ARM_V6:
1044 return Triple("armv6-apple-darwin");
1045 case MachO::CPU_SUBTYPE_ARM_V6M:
1047 *McpuDefault = "cortex-m0";
1048 return Triple("armv6m-apple-darwin");
1049 case MachO::CPU_SUBTYPE_ARM_V7:
1050 return Triple("armv7-apple-darwin");
1051 case MachO::CPU_SUBTYPE_ARM_V7EM:
1053 *McpuDefault = "cortex-m4";
1054 return Triple("armv7em-apple-darwin");
1055 case MachO::CPU_SUBTYPE_ARM_V7K:
1056 return Triple("armv7k-apple-darwin");
1057 case MachO::CPU_SUBTYPE_ARM_V7M:
1059 *McpuDefault = "cortex-m3";
1060 return Triple("armv7m-apple-darwin");
1061 case MachO::CPU_SUBTYPE_ARM_V7S:
1062 return Triple("armv7s-apple-darwin");
1066 case MachO::CPU_TYPE_ARM64:
1067 switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
1068 case MachO::CPU_SUBTYPE_ARM64_ALL:
1069 return Triple("arm64-apple-darwin");
1073 case MachO::CPU_TYPE_POWERPC:
1074 switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
1075 case MachO::CPU_SUBTYPE_POWERPC_ALL:
1076 return Triple("ppc-apple-darwin");
1080 case MachO::CPU_TYPE_POWERPC64:
1081 switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
1082 case MachO::CPU_SUBTYPE_POWERPC_ALL:
1083 return Triple("ppc64-apple-darwin");
1092 Triple MachOObjectFile::getThumbArch(uint32_t CPUType, uint32_t CPUSubType,
1093 const char **McpuDefault) {
1095 *McpuDefault = nullptr;
1098 case MachO::CPU_TYPE_ARM:
1099 switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
1100 case MachO::CPU_SUBTYPE_ARM_V4T:
1101 return Triple("thumbv4t-apple-darwin");
1102 case MachO::CPU_SUBTYPE_ARM_V5TEJ:
1103 return Triple("thumbv5e-apple-darwin");
1104 case MachO::CPU_SUBTYPE_ARM_XSCALE:
1105 return Triple("xscale-apple-darwin");
1106 case MachO::CPU_SUBTYPE_ARM_V6:
1107 return Triple("thumbv6-apple-darwin");
1108 case MachO::CPU_SUBTYPE_ARM_V6M:
1110 *McpuDefault = "cortex-m0";
1111 return Triple("thumbv6m-apple-darwin");
1112 case MachO::CPU_SUBTYPE_ARM_V7:
1113 return Triple("thumbv7-apple-darwin");
1114 case MachO::CPU_SUBTYPE_ARM_V7EM:
1116 *McpuDefault = "cortex-m4";
1117 return Triple("thumbv7em-apple-darwin");
1118 case MachO::CPU_SUBTYPE_ARM_V7K:
1119 return Triple("thumbv7k-apple-darwin");
1120 case MachO::CPU_SUBTYPE_ARM_V7M:
1122 *McpuDefault = "cortex-m3";
1123 return Triple("thumbv7m-apple-darwin");
1124 case MachO::CPU_SUBTYPE_ARM_V7S:
1125 return Triple("thumbv7s-apple-darwin");
1134 Triple MachOObjectFile::getArch(uint32_t CPUType, uint32_t CPUSubType,
1135 const char **McpuDefault,
1136 Triple *ThumbTriple) {
1137 Triple T = MachOObjectFile::getArch(CPUType, CPUSubType, McpuDefault);
1138 *ThumbTriple = MachOObjectFile::getThumbArch(CPUType, CPUSubType,
1143 Triple MachOObjectFile::getHostArch() {
1144 return Triple(sys::getDefaultTargetTriple());
1147 bool MachOObjectFile::isValidArch(StringRef ArchFlag) {
1148 return StringSwitch<bool>(ArchFlag)
1150 .Case("x86_64", true)
1151 .Case("x86_64h", true)
1152 .Case("armv4t", true)
1154 .Case("armv5e", true)
1155 .Case("armv6", true)
1156 .Case("armv6m", true)
1157 .Case("armv7", true)
1158 .Case("armv7em", true)
1159 .Case("armv7k", true)
1160 .Case("armv7m", true)
1161 .Case("armv7s", true)
1162 .Case("arm64", true)
1164 .Case("ppc64", true)
1168 unsigned MachOObjectFile::getArch() const {
1169 return getArch(getCPUType(this));
1172 Triple MachOObjectFile::getArch(const char **McpuDefault,
1173 Triple *ThumbTriple) const {
1174 *ThumbTriple = getThumbArch(Header.cputype, Header.cpusubtype, McpuDefault);
1175 return getArch(Header.cputype, Header.cpusubtype, McpuDefault);
1178 relocation_iterator MachOObjectFile::section_rel_begin(unsigned Index) const {
1181 return section_rel_begin(DRI);
1184 relocation_iterator MachOObjectFile::section_rel_end(unsigned Index) const {
1187 return section_rel_end(DRI);
1190 dice_iterator MachOObjectFile::begin_dices() const {
1192 if (!DataInCodeLoadCmd)
1193 return dice_iterator(DiceRef(DRI, this));
1195 MachO::linkedit_data_command DicLC = getDataInCodeLoadCommand();
1196 DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, DicLC.dataoff));
1197 return dice_iterator(DiceRef(DRI, this));
1200 dice_iterator MachOObjectFile::end_dices() const {
1202 if (!DataInCodeLoadCmd)
1203 return dice_iterator(DiceRef(DRI, this));
1205 MachO::linkedit_data_command DicLC = getDataInCodeLoadCommand();
1206 unsigned Offset = DicLC.dataoff + DicLC.datasize;
1207 DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
1208 return dice_iterator(DiceRef(DRI, this));
1211 ExportEntry::ExportEntry(ArrayRef<uint8_t> T)
1212 : Trie(T), Malformed(false), Done(false) { }
1214 void ExportEntry::moveToFirst() {
1216 pushDownUntilBottom();
1219 void ExportEntry::moveToEnd() {
1224 bool ExportEntry::operator==(const ExportEntry &Other) const {
1225 // Common case, one at end, other iterating from begin.
1226 if (Done || Other.Done)
1227 return (Done == Other.Done);
1228 // Not equal if different stack sizes.
1229 if (Stack.size() != Other.Stack.size())
1231 // Not equal if different cumulative strings.
1232 if (!CumulativeString.equals(Other.CumulativeString))
1234 // Equal if all nodes in both stacks match.
1235 for (unsigned i=0; i < Stack.size(); ++i) {
1236 if (Stack[i].Start != Other.Stack[i].Start)
1242 uint64_t ExportEntry::readULEB128(const uint8_t *&Ptr) {
1244 uint64_t Result = decodeULEB128(Ptr, &Count);
1246 if (Ptr > Trie.end()) {
1253 StringRef ExportEntry::name() const {
1254 return CumulativeString;
1257 uint64_t ExportEntry::flags() const {
1258 return Stack.back().Flags;
1261 uint64_t ExportEntry::address() const {
1262 return Stack.back().Address;
1265 uint64_t ExportEntry::other() const {
1266 return Stack.back().Other;
1269 StringRef ExportEntry::otherName() const {
1270 const char* ImportName = Stack.back().ImportName;
1272 return StringRef(ImportName);
1276 uint32_t ExportEntry::nodeOffset() const {
1277 return Stack.back().Start - Trie.begin();
1280 ExportEntry::NodeState::NodeState(const uint8_t *Ptr)
1281 : Start(Ptr), Current(Ptr), Flags(0), Address(0), Other(0),
1282 ImportName(nullptr), ChildCount(0), NextChildIndex(0),
1283 ParentStringLength(0), IsExportNode(false) {
1286 void ExportEntry::pushNode(uint64_t offset) {
1287 const uint8_t *Ptr = Trie.begin() + offset;
1288 NodeState State(Ptr);
1289 uint64_t ExportInfoSize = readULEB128(State.Current);
1290 State.IsExportNode = (ExportInfoSize != 0);
1291 const uint8_t* Children = State.Current + ExportInfoSize;
1292 if (State.IsExportNode) {
1293 State.Flags = readULEB128(State.Current);
1294 if (State.Flags & MachO::EXPORT_SYMBOL_FLAGS_REEXPORT) {
1296 State.Other = readULEB128(State.Current); // dylib ordinal
1297 State.ImportName = reinterpret_cast<const char*>(State.Current);
1299 State.Address = readULEB128(State.Current);
1300 if (State.Flags & MachO::EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER)
1301 State.Other = readULEB128(State.Current);
1304 State.ChildCount = *Children;
1305 State.Current = Children + 1;
1306 State.NextChildIndex = 0;
1307 State.ParentStringLength = CumulativeString.size();
1308 Stack.push_back(State);
1311 void ExportEntry::pushDownUntilBottom() {
1312 while (Stack.back().NextChildIndex < Stack.back().ChildCount) {
1313 NodeState &Top = Stack.back();
1314 CumulativeString.resize(Top.ParentStringLength);
1315 for (;*Top.Current != 0; Top.Current++) {
1316 char C = *Top.Current;
1317 CumulativeString.push_back(C);
1320 uint64_t childNodeIndex = readULEB128(Top.Current);
1321 Top.NextChildIndex += 1;
1322 pushNode(childNodeIndex);
1324 if (!Stack.back().IsExportNode) {
1330 // We have a trie data structure and need a way to walk it that is compatible
1331 // with the C++ iterator model. The solution is a non-recursive depth first
1332 // traversal where the iterator contains a stack of parent nodes along with a
1333 // string that is the accumulation of all edge strings along the parent chain
1336 // There is one "export" node for each exported symbol. But because some
1337 // symbols may be a prefix of another symbol (e.g. _dup and _dup2), an export
1338 // node may have child nodes too.
1340 // The algorithm for moveNext() is to keep moving down the leftmost unvisited
1341 // child until hitting a node with no children (which is an export node or
1342 // else the trie is malformed). On the way down, each node is pushed on the
1343 // stack ivar. If there is no more ways down, it pops up one and tries to go
1344 // down a sibling path until a childless node is reached.
1345 void ExportEntry::moveNext() {
1346 if (Stack.empty() || !Stack.back().IsExportNode) {
1353 while (!Stack.empty()) {
1354 NodeState &Top = Stack.back();
1355 if (Top.NextChildIndex < Top.ChildCount) {
1356 pushDownUntilBottom();
1357 // Now at the next export node.
1360 if (Top.IsExportNode) {
1361 // This node has no children but is itself an export node.
1362 CumulativeString.resize(Top.ParentStringLength);
1371 iterator_range<export_iterator>
1372 MachOObjectFile::exports(ArrayRef<uint8_t> Trie) {
1373 ExportEntry Start(Trie);
1374 if (Trie.size() == 0)
1377 Start.moveToFirst();
1379 ExportEntry Finish(Trie);
1382 return iterator_range<export_iterator>(export_iterator(Start),
1383 export_iterator(Finish));
1386 iterator_range<export_iterator> MachOObjectFile::exports() const {
1387 return exports(getDyldInfoExportsTrie());
1391 MachORebaseEntry::MachORebaseEntry(ArrayRef<uint8_t> Bytes, bool is64Bit)
1392 : Opcodes(Bytes), Ptr(Bytes.begin()), SegmentOffset(0), SegmentIndex(0),
1393 RemainingLoopCount(0), AdvanceAmount(0), RebaseType(0),
1394 PointerSize(is64Bit ? 8 : 4), Malformed(false), Done(false) {}
1396 void MachORebaseEntry::moveToFirst() {
1397 Ptr = Opcodes.begin();
1401 void MachORebaseEntry::moveToEnd() {
1402 Ptr = Opcodes.end();
1403 RemainingLoopCount = 0;
1407 void MachORebaseEntry::moveNext() {
1408 // If in the middle of some loop, move to next rebasing in loop.
1409 SegmentOffset += AdvanceAmount;
1410 if (RemainingLoopCount) {
1411 --RemainingLoopCount;
1414 if (Ptr == Opcodes.end()) {
1419 while (More && !Malformed) {
1420 // Parse next opcode and set up next loop.
1421 uint8_t Byte = *Ptr++;
1422 uint8_t ImmValue = Byte & MachO::REBASE_IMMEDIATE_MASK;
1423 uint8_t Opcode = Byte & MachO::REBASE_OPCODE_MASK;
1425 case MachO::REBASE_OPCODE_DONE:
1429 DEBUG_WITH_TYPE("mach-o-rebase", llvm::dbgs() << "REBASE_OPCODE_DONE\n");
1431 case MachO::REBASE_OPCODE_SET_TYPE_IMM:
1432 RebaseType = ImmValue;
1435 llvm::dbgs() << "REBASE_OPCODE_SET_TYPE_IMM: "
1436 << "RebaseType=" << (int) RebaseType << "\n");
1438 case MachO::REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB:
1439 SegmentIndex = ImmValue;
1440 SegmentOffset = readULEB128();
1443 llvm::dbgs() << "REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: "
1444 << "SegmentIndex=" << SegmentIndex << ", "
1445 << format("SegmentOffset=0x%06X", SegmentOffset)
1448 case MachO::REBASE_OPCODE_ADD_ADDR_ULEB:
1449 SegmentOffset += readULEB128();
1450 DEBUG_WITH_TYPE("mach-o-rebase",
1451 llvm::dbgs() << "REBASE_OPCODE_ADD_ADDR_ULEB: "
1452 << format("SegmentOffset=0x%06X",
1453 SegmentOffset) << "\n");
1455 case MachO::REBASE_OPCODE_ADD_ADDR_IMM_SCALED:
1456 SegmentOffset += ImmValue * PointerSize;
1457 DEBUG_WITH_TYPE("mach-o-rebase",
1458 llvm::dbgs() << "REBASE_OPCODE_ADD_ADDR_IMM_SCALED: "
1459 << format("SegmentOffset=0x%06X",
1460 SegmentOffset) << "\n");
1462 case MachO::REBASE_OPCODE_DO_REBASE_IMM_TIMES:
1463 AdvanceAmount = PointerSize;
1464 RemainingLoopCount = ImmValue - 1;
1467 llvm::dbgs() << "REBASE_OPCODE_DO_REBASE_IMM_TIMES: "
1468 << format("SegmentOffset=0x%06X", SegmentOffset)
1469 << ", AdvanceAmount=" << AdvanceAmount
1470 << ", RemainingLoopCount=" << RemainingLoopCount
1473 case MachO::REBASE_OPCODE_DO_REBASE_ULEB_TIMES:
1474 AdvanceAmount = PointerSize;
1475 RemainingLoopCount = readULEB128() - 1;
1478 llvm::dbgs() << "REBASE_OPCODE_DO_REBASE_ULEB_TIMES: "
1479 << format("SegmentOffset=0x%06X", SegmentOffset)
1480 << ", AdvanceAmount=" << AdvanceAmount
1481 << ", RemainingLoopCount=" << RemainingLoopCount
1484 case MachO::REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB:
1485 AdvanceAmount = readULEB128() + PointerSize;
1486 RemainingLoopCount = 0;
1489 llvm::dbgs() << "REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB: "
1490 << format("SegmentOffset=0x%06X", SegmentOffset)
1491 << ", AdvanceAmount=" << AdvanceAmount
1492 << ", RemainingLoopCount=" << RemainingLoopCount
1495 case MachO::REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB:
1496 RemainingLoopCount = readULEB128() - 1;
1497 AdvanceAmount = readULEB128() + PointerSize;
1500 llvm::dbgs() << "REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB: "
1501 << format("SegmentOffset=0x%06X", SegmentOffset)
1502 << ", AdvanceAmount=" << AdvanceAmount
1503 << ", RemainingLoopCount=" << RemainingLoopCount
1512 uint64_t MachORebaseEntry::readULEB128() {
1514 uint64_t Result = decodeULEB128(Ptr, &Count);
1516 if (Ptr > Opcodes.end()) {
1517 Ptr = Opcodes.end();
1523 uint32_t MachORebaseEntry::segmentIndex() const { return SegmentIndex; }
1525 uint64_t MachORebaseEntry::segmentOffset() const { return SegmentOffset; }
1527 StringRef MachORebaseEntry::typeName() const {
1528 switch (RebaseType) {
1529 case MachO::REBASE_TYPE_POINTER:
1531 case MachO::REBASE_TYPE_TEXT_ABSOLUTE32:
1532 return "text abs32";
1533 case MachO::REBASE_TYPE_TEXT_PCREL32:
1534 return "text rel32";
1539 bool MachORebaseEntry::operator==(const MachORebaseEntry &Other) const {
1540 assert(Opcodes == Other.Opcodes && "compare iterators of different files");
1541 return (Ptr == Other.Ptr) &&
1542 (RemainingLoopCount == Other.RemainingLoopCount) &&
1543 (Done == Other.Done);
1546 iterator_range<rebase_iterator>
1547 MachOObjectFile::rebaseTable(ArrayRef<uint8_t> Opcodes, bool is64) {
1548 MachORebaseEntry Start(Opcodes, is64);
1549 Start.moveToFirst();
1551 MachORebaseEntry Finish(Opcodes, is64);
1554 return iterator_range<rebase_iterator>(rebase_iterator(Start),
1555 rebase_iterator(Finish));
1558 iterator_range<rebase_iterator> MachOObjectFile::rebaseTable() const {
1559 return rebaseTable(getDyldInfoRebaseOpcodes(), is64Bit());
1563 MachOBindEntry::MachOBindEntry(ArrayRef<uint8_t> Bytes, bool is64Bit,
1565 : Opcodes(Bytes), Ptr(Bytes.begin()), SegmentOffset(0), SegmentIndex(0),
1566 Ordinal(0), Flags(0), Addend(0), RemainingLoopCount(0), AdvanceAmount(0),
1567 BindType(0), PointerSize(is64Bit ? 8 : 4),
1568 TableKind(BK), Malformed(false), Done(false) {}
1570 void MachOBindEntry::moveToFirst() {
1571 Ptr = Opcodes.begin();
1575 void MachOBindEntry::moveToEnd() {
1576 Ptr = Opcodes.end();
1577 RemainingLoopCount = 0;
1581 void MachOBindEntry::moveNext() {
1582 // If in the middle of some loop, move to next binding in loop.
1583 SegmentOffset += AdvanceAmount;
1584 if (RemainingLoopCount) {
1585 --RemainingLoopCount;
1588 if (Ptr == Opcodes.end()) {
1593 while (More && !Malformed) {
1594 // Parse next opcode and set up next loop.
1595 uint8_t Byte = *Ptr++;
1596 uint8_t ImmValue = Byte & MachO::BIND_IMMEDIATE_MASK;
1597 uint8_t Opcode = Byte & MachO::BIND_OPCODE_MASK;
1598 int8_t SignExtended;
1599 const uint8_t *SymStart;
1601 case MachO::BIND_OPCODE_DONE:
1602 if (TableKind == Kind::Lazy) {
1603 // Lazying bindings have a DONE opcode between entries. Need to ignore
1604 // it to advance to next entry. But need not if this is last entry.
1605 bool NotLastEntry = false;
1606 for (const uint8_t *P = Ptr; P < Opcodes.end(); ++P) {
1608 NotLastEntry = true;
1617 DEBUG_WITH_TYPE("mach-o-bind", llvm::dbgs() << "BIND_OPCODE_DONE\n");
1619 case MachO::BIND_OPCODE_SET_DYLIB_ORDINAL_IMM:
1623 llvm::dbgs() << "BIND_OPCODE_SET_DYLIB_ORDINAL_IMM: "
1624 << "Ordinal=" << Ordinal << "\n");
1626 case MachO::BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB:
1627 Ordinal = readULEB128();
1630 llvm::dbgs() << "BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB: "
1631 << "Ordinal=" << Ordinal << "\n");
1633 case MachO::BIND_OPCODE_SET_DYLIB_SPECIAL_IMM:
1635 SignExtended = MachO::BIND_OPCODE_MASK | ImmValue;
1636 Ordinal = SignExtended;
1641 llvm::dbgs() << "BIND_OPCODE_SET_DYLIB_SPECIAL_IMM: "
1642 << "Ordinal=" << Ordinal << "\n");
1644 case MachO::BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM:
1650 SymbolName = StringRef(reinterpret_cast<const char*>(SymStart),
1655 llvm::dbgs() << "BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM: "
1656 << "SymbolName=" << SymbolName << "\n");
1657 if (TableKind == Kind::Weak) {
1658 if (ImmValue & MachO::BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION)
1662 case MachO::BIND_OPCODE_SET_TYPE_IMM:
1663 BindType = ImmValue;
1666 llvm::dbgs() << "BIND_OPCODE_SET_TYPE_IMM: "
1667 << "BindType=" << (int)BindType << "\n");
1669 case MachO::BIND_OPCODE_SET_ADDEND_SLEB:
1670 Addend = readSLEB128();
1671 if (TableKind == Kind::Lazy)
1675 llvm::dbgs() << "BIND_OPCODE_SET_ADDEND_SLEB: "
1676 << "Addend=" << Addend << "\n");
1678 case MachO::BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB:
1679 SegmentIndex = ImmValue;
1680 SegmentOffset = readULEB128();
1683 llvm::dbgs() << "BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: "
1684 << "SegmentIndex=" << SegmentIndex << ", "
1685 << format("SegmentOffset=0x%06X", SegmentOffset)
1688 case MachO::BIND_OPCODE_ADD_ADDR_ULEB:
1689 SegmentOffset += readULEB128();
1690 DEBUG_WITH_TYPE("mach-o-bind",
1691 llvm::dbgs() << "BIND_OPCODE_ADD_ADDR_ULEB: "
1692 << format("SegmentOffset=0x%06X",
1693 SegmentOffset) << "\n");
1695 case MachO::BIND_OPCODE_DO_BIND:
1696 AdvanceAmount = PointerSize;
1697 RemainingLoopCount = 0;
1698 DEBUG_WITH_TYPE("mach-o-bind",
1699 llvm::dbgs() << "BIND_OPCODE_DO_BIND: "
1700 << format("SegmentOffset=0x%06X",
1701 SegmentOffset) << "\n");
1703 case MachO::BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB:
1704 AdvanceAmount = readULEB128() + PointerSize;
1705 RemainingLoopCount = 0;
1706 if (TableKind == Kind::Lazy)
1710 llvm::dbgs() << "BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB: "
1711 << format("SegmentOffset=0x%06X", SegmentOffset)
1712 << ", AdvanceAmount=" << AdvanceAmount
1713 << ", RemainingLoopCount=" << RemainingLoopCount
1716 case MachO::BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED:
1717 AdvanceAmount = ImmValue * PointerSize + PointerSize;
1718 RemainingLoopCount = 0;
1719 if (TableKind == Kind::Lazy)
1721 DEBUG_WITH_TYPE("mach-o-bind",
1723 << "BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED: "
1724 << format("SegmentOffset=0x%06X",
1725 SegmentOffset) << "\n");
1727 case MachO::BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB:
1728 RemainingLoopCount = readULEB128() - 1;
1729 AdvanceAmount = readULEB128() + PointerSize;
1730 if (TableKind == Kind::Lazy)
1734 llvm::dbgs() << "BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB: "
1735 << format("SegmentOffset=0x%06X", SegmentOffset)
1736 << ", AdvanceAmount=" << AdvanceAmount
1737 << ", RemainingLoopCount=" << RemainingLoopCount
1746 uint64_t MachOBindEntry::readULEB128() {
1748 uint64_t Result = decodeULEB128(Ptr, &Count);
1750 if (Ptr > Opcodes.end()) {
1751 Ptr = Opcodes.end();
1757 int64_t MachOBindEntry::readSLEB128() {
1759 int64_t Result = decodeSLEB128(Ptr, &Count);
1761 if (Ptr > Opcodes.end()) {
1762 Ptr = Opcodes.end();
1769 uint32_t MachOBindEntry::segmentIndex() const { return SegmentIndex; }
1771 uint64_t MachOBindEntry::segmentOffset() const { return SegmentOffset; }
1773 StringRef MachOBindEntry::typeName() const {
1775 case MachO::BIND_TYPE_POINTER:
1777 case MachO::BIND_TYPE_TEXT_ABSOLUTE32:
1778 return "text abs32";
1779 case MachO::BIND_TYPE_TEXT_PCREL32:
1780 return "text rel32";
1785 StringRef MachOBindEntry::symbolName() const { return SymbolName; }
1787 int64_t MachOBindEntry::addend() const { return Addend; }
1789 uint32_t MachOBindEntry::flags() const { return Flags; }
1791 int MachOBindEntry::ordinal() const { return Ordinal; }
1793 bool MachOBindEntry::operator==(const MachOBindEntry &Other) const {
1794 assert(Opcodes == Other.Opcodes && "compare iterators of different files");
1795 return (Ptr == Other.Ptr) &&
1796 (RemainingLoopCount == Other.RemainingLoopCount) &&
1797 (Done == Other.Done);
1800 iterator_range<bind_iterator>
1801 MachOObjectFile::bindTable(ArrayRef<uint8_t> Opcodes, bool is64,
1802 MachOBindEntry::Kind BKind) {
1803 MachOBindEntry Start(Opcodes, is64, BKind);
1804 Start.moveToFirst();
1806 MachOBindEntry Finish(Opcodes, is64, BKind);
1809 return iterator_range<bind_iterator>(bind_iterator(Start),
1810 bind_iterator(Finish));
1813 iterator_range<bind_iterator> MachOObjectFile::bindTable() const {
1814 return bindTable(getDyldInfoBindOpcodes(), is64Bit(),
1815 MachOBindEntry::Kind::Regular);
1818 iterator_range<bind_iterator> MachOObjectFile::lazyBindTable() const {
1819 return bindTable(getDyldInfoLazyBindOpcodes(), is64Bit(),
1820 MachOBindEntry::Kind::Lazy);
1823 iterator_range<bind_iterator> MachOObjectFile::weakBindTable() const {
1824 return bindTable(getDyldInfoWeakBindOpcodes(), is64Bit(),
1825 MachOBindEntry::Kind::Weak);
1828 MachOObjectFile::load_command_iterator
1829 MachOObjectFile::begin_load_commands() const {
1830 return LoadCommands.begin();
1833 MachOObjectFile::load_command_iterator
1834 MachOObjectFile::end_load_commands() const {
1835 return LoadCommands.end();
1838 iterator_range<MachOObjectFile::load_command_iterator>
1839 MachOObjectFile::load_commands() const {
1840 return iterator_range<load_command_iterator>(begin_load_commands(),
1841 end_load_commands());
1845 MachOObjectFile::getSectionFinalSegmentName(DataRefImpl Sec) const {
1846 ArrayRef<char> Raw = getSectionRawFinalSegmentName(Sec);
1847 return parseSegmentOrSectionName(Raw.data());
1851 MachOObjectFile::getSectionRawName(DataRefImpl Sec) const {
1852 assert(Sec.d.a < Sections.size() && "Should have detected this earlier");
1853 const section_base *Base =
1854 reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
1855 return makeArrayRef(Base->sectname);
1859 MachOObjectFile::getSectionRawFinalSegmentName(DataRefImpl Sec) const {
1860 assert(Sec.d.a < Sections.size() && "Should have detected this earlier");
1861 const section_base *Base =
1862 reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
1863 return makeArrayRef(Base->segname);
1867 MachOObjectFile::isRelocationScattered(const MachO::any_relocation_info &RE)
1869 if (getCPUType(this) == MachO::CPU_TYPE_X86_64)
1871 return getPlainRelocationAddress(RE) & MachO::R_SCATTERED;
1874 unsigned MachOObjectFile::getPlainRelocationSymbolNum(
1875 const MachO::any_relocation_info &RE) const {
1876 if (isLittleEndian())
1877 return RE.r_word1 & 0xffffff;
1878 return RE.r_word1 >> 8;
1881 bool MachOObjectFile::getPlainRelocationExternal(
1882 const MachO::any_relocation_info &RE) const {
1883 if (isLittleEndian())
1884 return (RE.r_word1 >> 27) & 1;
1885 return (RE.r_word1 >> 4) & 1;
1888 bool MachOObjectFile::getScatteredRelocationScattered(
1889 const MachO::any_relocation_info &RE) const {
1890 return RE.r_word0 >> 31;
1893 uint32_t MachOObjectFile::getScatteredRelocationValue(
1894 const MachO::any_relocation_info &RE) const {
1898 uint32_t MachOObjectFile::getScatteredRelocationType(
1899 const MachO::any_relocation_info &RE) const {
1900 return (RE.r_word0 >> 24) & 0xf;
1903 unsigned MachOObjectFile::getAnyRelocationAddress(
1904 const MachO::any_relocation_info &RE) const {
1905 if (isRelocationScattered(RE))
1906 return getScatteredRelocationAddress(RE);
1907 return getPlainRelocationAddress(RE);
1910 unsigned MachOObjectFile::getAnyRelocationPCRel(
1911 const MachO::any_relocation_info &RE) const {
1912 if (isRelocationScattered(RE))
1913 return getScatteredRelocationPCRel(this, RE);
1914 return getPlainRelocationPCRel(this, RE);
1917 unsigned MachOObjectFile::getAnyRelocationLength(
1918 const MachO::any_relocation_info &RE) const {
1919 if (isRelocationScattered(RE))
1920 return getScatteredRelocationLength(RE);
1921 return getPlainRelocationLength(this, RE);
1925 MachOObjectFile::getAnyRelocationType(
1926 const MachO::any_relocation_info &RE) const {
1927 if (isRelocationScattered(RE))
1928 return getScatteredRelocationType(RE);
1929 return getPlainRelocationType(this, RE);
1933 MachOObjectFile::getAnyRelocationSection(
1934 const MachO::any_relocation_info &RE) const {
1935 if (isRelocationScattered(RE) || getPlainRelocationExternal(RE))
1936 return *section_end();
1937 unsigned SecNum = getPlainRelocationSymbolNum(RE);
1938 if (SecNum == MachO::R_ABS || SecNum > Sections.size())
1939 return *section_end();
1941 DRI.d.a = SecNum - 1;
1942 return SectionRef(DRI, this);
1945 MachO::section MachOObjectFile::getSection(DataRefImpl DRI) const {
1946 assert(DRI.d.a < Sections.size() && "Should have detected this earlier");
1947 return getStruct<MachO::section>(this, Sections[DRI.d.a]);
1950 MachO::section_64 MachOObjectFile::getSection64(DataRefImpl DRI) const {
1951 assert(DRI.d.a < Sections.size() && "Should have detected this earlier");
1952 return getStruct<MachO::section_64>(this, Sections[DRI.d.a]);
1955 MachO::section MachOObjectFile::getSection(const LoadCommandInfo &L,
1956 unsigned Index) const {
1957 const char *Sec = getSectionPtr(this, L, Index);
1958 return getStruct<MachO::section>(this, Sec);
1961 MachO::section_64 MachOObjectFile::getSection64(const LoadCommandInfo &L,
1962 unsigned Index) const {
1963 const char *Sec = getSectionPtr(this, L, Index);
1964 return getStruct<MachO::section_64>(this, Sec);
1968 MachOObjectFile::getSymbolTableEntry(DataRefImpl DRI) const {
1969 const char *P = reinterpret_cast<const char *>(DRI.p);
1970 return getStruct<MachO::nlist>(this, P);
1974 MachOObjectFile::getSymbol64TableEntry(DataRefImpl DRI) const {
1975 const char *P = reinterpret_cast<const char *>(DRI.p);
1976 return getStruct<MachO::nlist_64>(this, P);
1979 MachO::linkedit_data_command
1980 MachOObjectFile::getLinkeditDataLoadCommand(const LoadCommandInfo &L) const {
1981 return getStruct<MachO::linkedit_data_command>(this, L.Ptr);
1984 MachO::segment_command
1985 MachOObjectFile::getSegmentLoadCommand(const LoadCommandInfo &L) const {
1986 return getStruct<MachO::segment_command>(this, L.Ptr);
1989 MachO::segment_command_64
1990 MachOObjectFile::getSegment64LoadCommand(const LoadCommandInfo &L) const {
1991 return getStruct<MachO::segment_command_64>(this, L.Ptr);
1994 MachO::linker_option_command
1995 MachOObjectFile::getLinkerOptionLoadCommand(const LoadCommandInfo &L) const {
1996 return getStruct<MachO::linker_option_command>(this, L.Ptr);
1999 MachO::version_min_command
2000 MachOObjectFile::getVersionMinLoadCommand(const LoadCommandInfo &L) const {
2001 return getStruct<MachO::version_min_command>(this, L.Ptr);
2004 MachO::dylib_command
2005 MachOObjectFile::getDylibIDLoadCommand(const LoadCommandInfo &L) const {
2006 return getStruct<MachO::dylib_command>(this, L.Ptr);
2009 MachO::dyld_info_command
2010 MachOObjectFile::getDyldInfoLoadCommand(const LoadCommandInfo &L) const {
2011 return getStruct<MachO::dyld_info_command>(this, L.Ptr);
2014 MachO::dylinker_command
2015 MachOObjectFile::getDylinkerCommand(const LoadCommandInfo &L) const {
2016 return getStruct<MachO::dylinker_command>(this, L.Ptr);
2020 MachOObjectFile::getUuidCommand(const LoadCommandInfo &L) const {
2021 return getStruct<MachO::uuid_command>(this, L.Ptr);
2024 MachO::rpath_command
2025 MachOObjectFile::getRpathCommand(const LoadCommandInfo &L) const {
2026 return getStruct<MachO::rpath_command>(this, L.Ptr);
2029 MachO::source_version_command
2030 MachOObjectFile::getSourceVersionCommand(const LoadCommandInfo &L) const {
2031 return getStruct<MachO::source_version_command>(this, L.Ptr);
2034 MachO::entry_point_command
2035 MachOObjectFile::getEntryPointCommand(const LoadCommandInfo &L) const {
2036 return getStruct<MachO::entry_point_command>(this, L.Ptr);
2039 MachO::encryption_info_command
2040 MachOObjectFile::getEncryptionInfoCommand(const LoadCommandInfo &L) const {
2041 return getStruct<MachO::encryption_info_command>(this, L.Ptr);
2044 MachO::encryption_info_command_64
2045 MachOObjectFile::getEncryptionInfoCommand64(const LoadCommandInfo &L) const {
2046 return getStruct<MachO::encryption_info_command_64>(this, L.Ptr);
2049 MachO::sub_framework_command
2050 MachOObjectFile::getSubFrameworkCommand(const LoadCommandInfo &L) const {
2051 return getStruct<MachO::sub_framework_command>(this, L.Ptr);
2054 MachO::sub_umbrella_command
2055 MachOObjectFile::getSubUmbrellaCommand(const LoadCommandInfo &L) const {
2056 return getStruct<MachO::sub_umbrella_command>(this, L.Ptr);
2059 MachO::sub_library_command
2060 MachOObjectFile::getSubLibraryCommand(const LoadCommandInfo &L) const {
2061 return getStruct<MachO::sub_library_command>(this, L.Ptr);
2064 MachO::sub_client_command
2065 MachOObjectFile::getSubClientCommand(const LoadCommandInfo &L) const {
2066 return getStruct<MachO::sub_client_command>(this, L.Ptr);
2069 MachO::routines_command
2070 MachOObjectFile::getRoutinesCommand(const LoadCommandInfo &L) const {
2071 return getStruct<MachO::routines_command>(this, L.Ptr);
2074 MachO::routines_command_64
2075 MachOObjectFile::getRoutinesCommand64(const LoadCommandInfo &L) const {
2076 return getStruct<MachO::routines_command_64>(this, L.Ptr);
2079 MachO::thread_command
2080 MachOObjectFile::getThreadCommand(const LoadCommandInfo &L) const {
2081 return getStruct<MachO::thread_command>(this, L.Ptr);
2084 MachO::any_relocation_info
2085 MachOObjectFile::getRelocation(DataRefImpl Rel) const {
2090 MachO::section_64 Sect = getSection64(Sec);
2091 Offset = Sect.reloff;
2093 MachO::section Sect = getSection(Sec);
2094 Offset = Sect.reloff;
2097 auto P = reinterpret_cast<const MachO::any_relocation_info *>(
2098 getPtr(this, Offset)) + Rel.d.b;
2099 return getStruct<MachO::any_relocation_info>(
2100 this, reinterpret_cast<const char *>(P));
2103 MachO::data_in_code_entry
2104 MachOObjectFile::getDice(DataRefImpl Rel) const {
2105 const char *P = reinterpret_cast<const char *>(Rel.p);
2106 return getStruct<MachO::data_in_code_entry>(this, P);
2109 const MachO::mach_header &MachOObjectFile::getHeader() const {
2113 const MachO::mach_header_64 &MachOObjectFile::getHeader64() const {
2118 uint32_t MachOObjectFile::getIndirectSymbolTableEntry(
2119 const MachO::dysymtab_command &DLC,
2120 unsigned Index) const {
2121 uint64_t Offset = DLC.indirectsymoff + Index * sizeof(uint32_t);
2122 return getStruct<uint32_t>(this, getPtr(this, Offset));
2125 MachO::data_in_code_entry
2126 MachOObjectFile::getDataInCodeTableEntry(uint32_t DataOffset,
2127 unsigned Index) const {
2128 uint64_t Offset = DataOffset + Index * sizeof(MachO::data_in_code_entry);
2129 return getStruct<MachO::data_in_code_entry>(this, getPtr(this, Offset));
2132 MachO::symtab_command MachOObjectFile::getSymtabLoadCommand() const {
2134 return getStruct<MachO::symtab_command>(this, SymtabLoadCmd);
2136 // If there is no SymtabLoadCmd return a load command with zero'ed fields.
2137 MachO::symtab_command Cmd;
2138 Cmd.cmd = MachO::LC_SYMTAB;
2139 Cmd.cmdsize = sizeof(MachO::symtab_command);
2147 MachO::dysymtab_command MachOObjectFile::getDysymtabLoadCommand() const {
2148 if (DysymtabLoadCmd)
2149 return getStruct<MachO::dysymtab_command>(this, DysymtabLoadCmd);
2151 // If there is no DysymtabLoadCmd return a load command with zero'ed fields.
2152 MachO::dysymtab_command Cmd;
2153 Cmd.cmd = MachO::LC_DYSYMTAB;
2154 Cmd.cmdsize = sizeof(MachO::dysymtab_command);
2165 Cmd.extrefsymoff = 0;
2166 Cmd.nextrefsyms = 0;
2167 Cmd.indirectsymoff = 0;
2168 Cmd.nindirectsyms = 0;
2176 MachO::linkedit_data_command
2177 MachOObjectFile::getDataInCodeLoadCommand() const {
2178 if (DataInCodeLoadCmd)
2179 return getStruct<MachO::linkedit_data_command>(this, DataInCodeLoadCmd);
2181 // If there is no DataInCodeLoadCmd return a load command with zero'ed fields.
2182 MachO::linkedit_data_command Cmd;
2183 Cmd.cmd = MachO::LC_DATA_IN_CODE;
2184 Cmd.cmdsize = sizeof(MachO::linkedit_data_command);
2190 MachO::linkedit_data_command
2191 MachOObjectFile::getLinkOptHintsLoadCommand() const {
2192 if (LinkOptHintsLoadCmd)
2193 return getStruct<MachO::linkedit_data_command>(this, LinkOptHintsLoadCmd);
2195 // If there is no LinkOptHintsLoadCmd return a load command with zero'ed
2197 MachO::linkedit_data_command Cmd;
2198 Cmd.cmd = MachO::LC_LINKER_OPTIMIZATION_HINT;
2199 Cmd.cmdsize = sizeof(MachO::linkedit_data_command);
2205 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoRebaseOpcodes() const {
2206 if (!DyldInfoLoadCmd)
2207 return ArrayRef<uint8_t>();
2209 MachO::dyld_info_command DyldInfo
2210 = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
2211 const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
2212 getPtr(this, DyldInfo.rebase_off));
2213 return ArrayRef<uint8_t>(Ptr, DyldInfo.rebase_size);
2216 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoBindOpcodes() const {
2217 if (!DyldInfoLoadCmd)
2218 return ArrayRef<uint8_t>();
2220 MachO::dyld_info_command DyldInfo
2221 = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
2222 const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
2223 getPtr(this, DyldInfo.bind_off));
2224 return ArrayRef<uint8_t>(Ptr, DyldInfo.bind_size);
2227 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoWeakBindOpcodes() const {
2228 if (!DyldInfoLoadCmd)
2229 return ArrayRef<uint8_t>();
2231 MachO::dyld_info_command DyldInfo
2232 = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
2233 const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
2234 getPtr(this, DyldInfo.weak_bind_off));
2235 return ArrayRef<uint8_t>(Ptr, DyldInfo.weak_bind_size);
2238 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoLazyBindOpcodes() const {
2239 if (!DyldInfoLoadCmd)
2240 return ArrayRef<uint8_t>();
2242 MachO::dyld_info_command DyldInfo
2243 = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
2244 const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
2245 getPtr(this, DyldInfo.lazy_bind_off));
2246 return ArrayRef<uint8_t>(Ptr, DyldInfo.lazy_bind_size);
2249 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoExportsTrie() const {
2250 if (!DyldInfoLoadCmd)
2251 return ArrayRef<uint8_t>();
2253 MachO::dyld_info_command DyldInfo
2254 = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
2255 const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
2256 getPtr(this, DyldInfo.export_off));
2257 return ArrayRef<uint8_t>(Ptr, DyldInfo.export_size);
2260 ArrayRef<uint8_t> MachOObjectFile::getUuid() const {
2262 return ArrayRef<uint8_t>();
2263 // Returning a pointer is fine as uuid doesn't need endian swapping.
2264 const char *Ptr = UuidLoadCmd + offsetof(MachO::uuid_command, uuid);
2265 return ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(Ptr), 16);
2268 StringRef MachOObjectFile::getStringTableData() const {
2269 MachO::symtab_command S = getSymtabLoadCommand();
2270 return getData().substr(S.stroff, S.strsize);
2273 bool MachOObjectFile::is64Bit() const {
2274 return getType() == getMachOType(false, true) ||
2275 getType() == getMachOType(true, true);
2278 void MachOObjectFile::ReadULEB128s(uint64_t Index,
2279 SmallVectorImpl<uint64_t> &Out) const {
2280 DataExtractor extractor(ObjectFile::getData(), true, 0);
2282 uint32_t offset = Index;
2284 while (uint64_t delta = extractor.getULEB128(&offset)) {
2286 Out.push_back(data);
2290 bool MachOObjectFile::isRelocatableObject() const {
2291 return getHeader().filetype == MachO::MH_OBJECT;
2294 ErrorOr<std::unique_ptr<MachOObjectFile>>
2295 ObjectFile::createMachOObjectFile(MemoryBufferRef Buffer) {
2296 StringRef Magic = Buffer.getBuffer().slice(0, 4);
2298 std::unique_ptr<MachOObjectFile> Ret;
2299 if (Magic == "\xFE\xED\xFA\xCE")
2300 Ret.reset(new MachOObjectFile(Buffer, false, false, EC));
2301 else if (Magic == "\xCE\xFA\xED\xFE")
2302 Ret.reset(new MachOObjectFile(Buffer, true, false, EC));
2303 else if (Magic == "\xFE\xED\xFA\xCF")
2304 Ret.reset(new MachOObjectFile(Buffer, false, true, EC));
2305 else if (Magic == "\xCF\xFA\xED\xFE")
2306 Ret.reset(new MachOObjectFile(Buffer, true, true, EC));
2308 return object_error::parse_failed;
2312 return std::move(Ret);