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/Triple.h"
18 #include "llvm/Support/DataExtractor.h"
19 #include "llvm/Support/Format.h"
20 #include "llvm/Support/Host.h"
21 #include "llvm/Support/MemoryBuffer.h"
22 #include "llvm/Support/raw_ostream.h"
28 using namespace object;
47 static void SwapStruct(T &Value);
50 void SwapStruct(MachO::any_relocation_info &H) {
51 sys::swapByteOrder(H.r_word0);
52 sys::swapByteOrder(H.r_word1);
56 void SwapStruct(MachO::load_command &L) {
57 sys::swapByteOrder(L.cmd);
58 sys::swapByteOrder(L.cmdsize);
62 void SwapStruct(nlist_base &S) {
63 sys::swapByteOrder(S.n_strx);
64 sys::swapByteOrder(S.n_desc);
68 void SwapStruct(MachO::section &S) {
69 sys::swapByteOrder(S.addr);
70 sys::swapByteOrder(S.size);
71 sys::swapByteOrder(S.offset);
72 sys::swapByteOrder(S.align);
73 sys::swapByteOrder(S.reloff);
74 sys::swapByteOrder(S.nreloc);
75 sys::swapByteOrder(S.flags);
76 sys::swapByteOrder(S.reserved1);
77 sys::swapByteOrder(S.reserved2);
81 void SwapStruct(MachO::section_64 &S) {
82 sys::swapByteOrder(S.addr);
83 sys::swapByteOrder(S.size);
84 sys::swapByteOrder(S.offset);
85 sys::swapByteOrder(S.align);
86 sys::swapByteOrder(S.reloff);
87 sys::swapByteOrder(S.nreloc);
88 sys::swapByteOrder(S.flags);
89 sys::swapByteOrder(S.reserved1);
90 sys::swapByteOrder(S.reserved2);
91 sys::swapByteOrder(S.reserved3);
95 void SwapStruct(MachO::nlist &S) {
96 sys::swapByteOrder(S.n_strx);
97 sys::swapByteOrder(S.n_desc);
98 sys::swapByteOrder(S.n_value);
102 void SwapStruct(MachO::nlist_64 &S) {
103 sys::swapByteOrder(S.n_strx);
104 sys::swapByteOrder(S.n_desc);
105 sys::swapByteOrder(S.n_value);
109 void SwapStruct(MachO::mach_header &H) {
110 sys::swapByteOrder(H.magic);
111 sys::swapByteOrder(H.cputype);
112 sys::swapByteOrder(H.cpusubtype);
113 sys::swapByteOrder(H.filetype);
114 sys::swapByteOrder(H.ncmds);
115 sys::swapByteOrder(H.sizeofcmds);
116 sys::swapByteOrder(H.flags);
120 void SwapStruct(MachO::mach_header_64 &H) {
121 sys::swapByteOrder(H.magic);
122 sys::swapByteOrder(H.cputype);
123 sys::swapByteOrder(H.cpusubtype);
124 sys::swapByteOrder(H.filetype);
125 sys::swapByteOrder(H.ncmds);
126 sys::swapByteOrder(H.sizeofcmds);
127 sys::swapByteOrder(H.flags);
128 sys::swapByteOrder(H.reserved);
132 void SwapStruct(MachO::symtab_command &C) {
133 sys::swapByteOrder(C.cmd);
134 sys::swapByteOrder(C.cmdsize);
135 sys::swapByteOrder(C.symoff);
136 sys::swapByteOrder(C.nsyms);
137 sys::swapByteOrder(C.stroff);
138 sys::swapByteOrder(C.strsize);
142 void SwapStruct(MachO::dysymtab_command &C) {
143 sys::swapByteOrder(C.cmd);
144 sys::swapByteOrder(C.cmdsize);
145 sys::swapByteOrder(C.ilocalsym);
146 sys::swapByteOrder(C.nlocalsym);
147 sys::swapByteOrder(C.iextdefsym);
148 sys::swapByteOrder(C.nextdefsym);
149 sys::swapByteOrder(C.iundefsym);
150 sys::swapByteOrder(C.nundefsym);
151 sys::swapByteOrder(C.tocoff);
152 sys::swapByteOrder(C.ntoc);
153 sys::swapByteOrder(C.modtaboff);
154 sys::swapByteOrder(C.nmodtab);
155 sys::swapByteOrder(C.extrefsymoff);
156 sys::swapByteOrder(C.nextrefsyms);
157 sys::swapByteOrder(C.indirectsymoff);
158 sys::swapByteOrder(C.nindirectsyms);
159 sys::swapByteOrder(C.extreloff);
160 sys::swapByteOrder(C.nextrel);
161 sys::swapByteOrder(C.locreloff);
162 sys::swapByteOrder(C.nlocrel);
166 void SwapStruct(MachO::linkedit_data_command &C) {
167 sys::swapByteOrder(C.cmd);
168 sys::swapByteOrder(C.cmdsize);
169 sys::swapByteOrder(C.dataoff);
170 sys::swapByteOrder(C.datasize);
174 void SwapStruct(MachO::segment_command &C) {
175 sys::swapByteOrder(C.cmd);
176 sys::swapByteOrder(C.cmdsize);
177 sys::swapByteOrder(C.vmaddr);
178 sys::swapByteOrder(C.vmsize);
179 sys::swapByteOrder(C.fileoff);
180 sys::swapByteOrder(C.filesize);
181 sys::swapByteOrder(C.maxprot);
182 sys::swapByteOrder(C.initprot);
183 sys::swapByteOrder(C.nsects);
184 sys::swapByteOrder(C.flags);
188 void SwapStruct(MachO::segment_command_64 &C) {
189 sys::swapByteOrder(C.cmd);
190 sys::swapByteOrder(C.cmdsize);
191 sys::swapByteOrder(C.vmaddr);
192 sys::swapByteOrder(C.vmsize);
193 sys::swapByteOrder(C.fileoff);
194 sys::swapByteOrder(C.filesize);
195 sys::swapByteOrder(C.maxprot);
196 sys::swapByteOrder(C.initprot);
197 sys::swapByteOrder(C.nsects);
198 sys::swapByteOrder(C.flags);
202 void SwapStruct(uint32_t &C) {
203 sys::swapByteOrder(C);
207 void SwapStruct(MachO::linker_options_command &C) {
208 sys::swapByteOrder(C.cmd);
209 sys::swapByteOrder(C.cmdsize);
210 sys::swapByteOrder(C.count);
214 void SwapStruct(MachO::version_min_command&C) {
215 sys::swapByteOrder(C.cmd);
216 sys::swapByteOrder(C.cmdsize);
217 sys::swapByteOrder(C.version);
218 sys::swapByteOrder(C.reserved);
222 void SwapStruct(MachO::dylib_command&C) {
223 sys::swapByteOrder(C.cmd);
224 sys::swapByteOrder(C.cmdsize);
225 sys::swapByteOrder(C.dylib.name);
226 sys::swapByteOrder(C.dylib.timestamp);
227 sys::swapByteOrder(C.dylib.current_version);
228 sys::swapByteOrder(C.dylib.compatibility_version);
232 void SwapStruct(MachO::data_in_code_entry &C) {
233 sys::swapByteOrder(C.offset);
234 sys::swapByteOrder(C.length);
235 sys::swapByteOrder(C.kind);
239 T getStruct(const MachOObjectFile *O, const char *P) {
241 memcpy(&Cmd, P, sizeof(T));
242 if (O->isLittleEndian() != sys::IsLittleEndianHost)
248 getSegmentLoadCommandNumSections(const MachOObjectFile *O,
249 const MachOObjectFile::LoadCommandInfo &L) {
251 MachO::segment_command_64 S = O->getSegment64LoadCommand(L);
254 MachO::segment_command S = O->getSegmentLoadCommand(L);
259 getSectionPtr(const MachOObjectFile *O, MachOObjectFile::LoadCommandInfo L,
261 uintptr_t CommandAddr = reinterpret_cast<uintptr_t>(L.Ptr);
263 bool Is64 = O->is64Bit();
264 unsigned SegmentLoadSize = Is64 ? sizeof(MachO::segment_command_64) :
265 sizeof(MachO::segment_command);
266 unsigned SectionSize = Is64 ? sizeof(MachO::section_64) :
267 sizeof(MachO::section);
269 uintptr_t SectionAddr = CommandAddr + SegmentLoadSize + Sec * SectionSize;
270 return reinterpret_cast<const char*>(SectionAddr);
273 static const char *getPtr(const MachOObjectFile *O, size_t Offset) {
274 return O->getData().substr(Offset, 1).data();
278 getSymbolTableEntryBase(const MachOObjectFile *O, DataRefImpl DRI) {
279 const char *P = reinterpret_cast<const char *>(DRI.p);
280 return getStruct<nlist_base>(O, P);
283 static StringRef parseSegmentOrSectionName(const char *P) {
287 // Not null terminated, so this is a 16 char string.
288 return StringRef(P, 16);
291 // Helper to advance a section or symbol iterator multiple increments at a time.
293 static void advance(T &it, size_t Val) {
298 static unsigned getCPUType(const MachOObjectFile *O) {
299 return O->getHeader().cputype;
302 static void printRelocationTargetName(const MachOObjectFile *O,
303 const MachO::any_relocation_info &RE,
304 raw_string_ostream &fmt) {
305 bool IsScattered = O->isRelocationScattered(RE);
307 // Target of a scattered relocation is an address. In the interest of
308 // generating pretty output, scan through the symbol table looking for a
309 // symbol that aligns with that address. If we find one, print it.
310 // Otherwise, we just print the hex address of the target.
312 uint32_t Val = O->getPlainRelocationSymbolNum(RE);
314 for (const SymbolRef &Symbol : O->symbols()) {
319 if ((ec = Symbol.getAddress(Addr)))
320 report_fatal_error(ec.message());
323 if ((ec = Symbol.getName(Name)))
324 report_fatal_error(ec.message());
329 // If we couldn't find a symbol that this relocation refers to, try
330 // to find a section beginning instead.
331 for (const SectionRef &Section : O->sections()) {
336 if ((ec = Section.getAddress(Addr)))
337 report_fatal_error(ec.message());
340 if ((ec = Section.getName(Name)))
341 report_fatal_error(ec.message());
346 fmt << format("0x%x", Val);
351 bool isExtern = O->getPlainRelocationExternal(RE);
352 uint64_t Val = O->getPlainRelocationSymbolNum(RE);
355 symbol_iterator SI = O->symbol_begin();
359 section_iterator SI = O->section_begin();
360 // Adjust for the fact that sections are 1-indexed.
361 advance(SI, Val - 1);
369 getPlainRelocationAddress(const MachO::any_relocation_info &RE) {
374 getScatteredRelocationAddress(const MachO::any_relocation_info &RE) {
375 return RE.r_word0 & 0xffffff;
378 static bool getPlainRelocationPCRel(const MachOObjectFile *O,
379 const MachO::any_relocation_info &RE) {
380 if (O->isLittleEndian())
381 return (RE.r_word1 >> 24) & 1;
382 return (RE.r_word1 >> 7) & 1;
386 getScatteredRelocationPCRel(const MachOObjectFile *O,
387 const MachO::any_relocation_info &RE) {
388 return (RE.r_word0 >> 30) & 1;
391 static unsigned getPlainRelocationLength(const MachOObjectFile *O,
392 const MachO::any_relocation_info &RE) {
393 if (O->isLittleEndian())
394 return (RE.r_word1 >> 25) & 3;
395 return (RE.r_word1 >> 5) & 3;
399 getScatteredRelocationLength(const MachO::any_relocation_info &RE) {
400 return (RE.r_word0 >> 28) & 3;
403 static unsigned getPlainRelocationType(const MachOObjectFile *O,
404 const MachO::any_relocation_info &RE) {
405 if (O->isLittleEndian())
406 return RE.r_word1 >> 28;
407 return RE.r_word1 & 0xf;
411 getScatteredRelocationType(const MachO::any_relocation_info &RE) {
412 return (RE.r_word0 >> 24) & 0xf;
415 static uint32_t getSectionFlags(const MachOObjectFile *O,
418 MachO::section_64 Sect = O->getSection64(Sec);
421 MachO::section Sect = O->getSection(Sec);
425 MachOObjectFile::MachOObjectFile(MemoryBuffer *Object, bool IsLittleEndian,
426 bool Is64bits, std::error_code &EC,
428 : ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object, BufferOwned),
429 SymtabLoadCmd(nullptr), DysymtabLoadCmd(nullptr),
430 DataInCodeLoadCmd(nullptr) {
431 uint32_t LoadCommandCount = this->getHeader().ncmds;
432 MachO::LoadCommandType SegmentLoadType = is64Bit() ?
433 MachO::LC_SEGMENT_64 : MachO::LC_SEGMENT;
435 MachOObjectFile::LoadCommandInfo Load = getFirstLoadCommandInfo();
436 for (unsigned I = 0; ; ++I) {
437 if (Load.C.cmd == MachO::LC_SYMTAB) {
438 assert(!SymtabLoadCmd && "Multiple symbol tables");
439 SymtabLoadCmd = Load.Ptr;
440 } else if (Load.C.cmd == MachO::LC_DYSYMTAB) {
441 assert(!DysymtabLoadCmd && "Multiple dynamic symbol tables");
442 DysymtabLoadCmd = Load.Ptr;
443 } else if (Load.C.cmd == MachO::LC_DATA_IN_CODE) {
444 assert(!DataInCodeLoadCmd && "Multiple data in code tables");
445 DataInCodeLoadCmd = Load.Ptr;
446 } else if (Load.C.cmd == SegmentLoadType) {
447 uint32_t NumSections = getSegmentLoadCommandNumSections(this, Load);
448 for (unsigned J = 0; J < NumSections; ++J) {
449 const char *Sec = getSectionPtr(this, Load, J);
450 Sections.push_back(Sec);
452 } else if (Load.C.cmd == MachO::LC_LOAD_DYLIB ||
453 Load.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||
454 Load.C.cmd == MachO::LC_LAZY_LOAD_DYLIB ||
455 Load.C.cmd == MachO::LC_REEXPORT_DYLIB ||
456 Load.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
457 Libraries.push_back(Load.Ptr);
460 if (I == LoadCommandCount - 1)
463 Load = getNextLoadCommandInfo(Load);
467 void MachOObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
468 unsigned SymbolTableEntrySize = is64Bit() ?
469 sizeof(MachO::nlist_64) :
470 sizeof(MachO::nlist);
471 Symb.p += SymbolTableEntrySize;
474 std::error_code MachOObjectFile::getSymbolName(DataRefImpl Symb,
475 StringRef &Res) const {
476 StringRef StringTable = getStringTableData();
477 nlist_base Entry = getSymbolTableEntryBase(this, Symb);
478 const char *Start = &StringTable.data()[Entry.n_strx];
479 Res = StringRef(Start);
480 return object_error::success;
483 // getIndirectName() returns the name of the alias'ed symbol who's string table
484 // index is in the n_value field.
485 std::error_code MachOObjectFile::getIndirectName(DataRefImpl Symb,
486 StringRef &Res) const {
487 StringRef StringTable = getStringTableData();
490 MachO::nlist_64 Entry = getSymbol64TableEntry(Symb);
491 NValue = Entry.n_value;
492 if ((Entry.n_type & MachO::N_TYPE) != MachO::N_INDR)
493 return object_error::parse_failed;
495 MachO::nlist Entry = getSymbolTableEntry(Symb);
496 NValue = Entry.n_value;
497 if ((Entry.n_type & MachO::N_TYPE) != MachO::N_INDR)
498 return object_error::parse_failed;
500 if (NValue >= StringTable.size())
501 return object_error::parse_failed;
502 const char *Start = &StringTable.data()[NValue];
503 Res = StringRef(Start);
504 return object_error::success;
507 std::error_code MachOObjectFile::getSymbolAddress(DataRefImpl Symb,
508 uint64_t &Res) const {
510 MachO::nlist_64 Entry = getSymbol64TableEntry(Symb);
511 if ((Entry.n_type & MachO::N_TYPE) == MachO::N_UNDF &&
513 Res = UnknownAddressOrSize;
517 MachO::nlist Entry = getSymbolTableEntry(Symb);
518 if ((Entry.n_type & MachO::N_TYPE) == MachO::N_UNDF &&
520 Res = UnknownAddressOrSize;
524 return object_error::success;
527 std::error_code MachOObjectFile::getSymbolAlignment(DataRefImpl DRI,
528 uint32_t &Result) const {
529 uint32_t flags = getSymbolFlags(DRI);
530 if (flags & SymbolRef::SF_Common) {
531 nlist_base Entry = getSymbolTableEntryBase(this, DRI);
532 Result = 1 << MachO::GET_COMM_ALIGN(Entry.n_desc);
536 return object_error::success;
539 std::error_code MachOObjectFile::getSymbolSize(DataRefImpl DRI,
540 uint64_t &Result) const {
541 uint64_t BeginOffset;
542 uint64_t EndOffset = 0;
543 uint8_t SectionIndex;
545 nlist_base Entry = getSymbolTableEntryBase(this, DRI);
547 getSymbolAddress(DRI, Value);
548 if (Value == UnknownAddressOrSize) {
549 Result = UnknownAddressOrSize;
550 return object_error::success;
555 SectionIndex = Entry.n_sect;
557 uint32_t flags = getSymbolFlags(DRI);
558 if (flags & SymbolRef::SF_Common)
561 Result = UnknownAddressOrSize;
562 return object_error::success;
564 // Unfortunately symbols are unsorted so we need to touch all
565 // symbols from load command
566 for (const SymbolRef &Symbol : symbols()) {
567 DataRefImpl DRI = Symbol.getRawDataRefImpl();
568 Entry = getSymbolTableEntryBase(this, DRI);
569 getSymbolAddress(DRI, Value);
570 if (Value == UnknownAddressOrSize)
572 if (Entry.n_sect == SectionIndex && Value > BeginOffset)
573 if (!EndOffset || Value < EndOffset)
579 Sec.d.a = SectionIndex-1;
580 getSectionSize(Sec, Size);
581 getSectionAddress(Sec, EndOffset);
584 Result = EndOffset - BeginOffset;
585 return object_error::success;
588 std::error_code MachOObjectFile::getSymbolType(DataRefImpl Symb,
589 SymbolRef::Type &Res) const {
590 nlist_base Entry = getSymbolTableEntryBase(this, Symb);
591 uint8_t n_type = Entry.n_type;
593 Res = SymbolRef::ST_Other;
595 // If this is a STAB debugging symbol, we can do nothing more.
596 if (n_type & MachO::N_STAB) {
597 Res = SymbolRef::ST_Debug;
598 return object_error::success;
601 switch (n_type & MachO::N_TYPE) {
603 Res = SymbolRef::ST_Unknown;
606 Res = SymbolRef::ST_Function;
609 return object_error::success;
612 uint32_t MachOObjectFile::getSymbolFlags(DataRefImpl DRI) const {
613 nlist_base Entry = getSymbolTableEntryBase(this, DRI);
615 uint8_t MachOType = Entry.n_type;
616 uint16_t MachOFlags = Entry.n_desc;
618 uint32_t Result = SymbolRef::SF_None;
620 if ((MachOType & MachO::N_TYPE) == MachO::N_UNDF)
621 Result |= SymbolRef::SF_Undefined;
623 if ((MachOType & MachO::N_TYPE) == MachO::N_INDR)
624 Result |= SymbolRef::SF_Indirect;
626 if (MachOType & MachO::N_STAB)
627 Result |= SymbolRef::SF_FormatSpecific;
629 if (MachOType & MachO::N_EXT) {
630 Result |= SymbolRef::SF_Global;
631 if ((MachOType & MachO::N_TYPE) == MachO::N_UNDF) {
633 getSymbolAddress(DRI, Value);
634 if (Value && Value != UnknownAddressOrSize)
635 Result |= SymbolRef::SF_Common;
639 if (MachOFlags & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
640 Result |= SymbolRef::SF_Weak;
642 if ((MachOType & MachO::N_TYPE) == MachO::N_ABS)
643 Result |= SymbolRef::SF_Absolute;
648 std::error_code MachOObjectFile::getSymbolSection(DataRefImpl Symb,
649 section_iterator &Res) const {
650 nlist_base Entry = getSymbolTableEntryBase(this, Symb);
651 uint8_t index = Entry.n_sect;
658 Res = section_iterator(SectionRef(DRI, this));
661 return object_error::success;
664 void MachOObjectFile::moveSectionNext(DataRefImpl &Sec) const {
668 std::error_code MachOObjectFile::getSectionName(DataRefImpl Sec,
669 StringRef &Result) const {
670 ArrayRef<char> Raw = getSectionRawName(Sec);
671 Result = parseSegmentOrSectionName(Raw.data());
672 return object_error::success;
675 std::error_code MachOObjectFile::getSectionAddress(DataRefImpl Sec,
676 uint64_t &Res) const {
678 MachO::section_64 Sect = getSection64(Sec);
681 MachO::section Sect = getSection(Sec);
684 return object_error::success;
687 std::error_code MachOObjectFile::getSectionSize(DataRefImpl Sec,
688 uint64_t &Res) const {
690 MachO::section_64 Sect = getSection64(Sec);
693 MachO::section Sect = getSection(Sec);
697 return object_error::success;
700 std::error_code MachOObjectFile::getSectionContents(DataRefImpl Sec,
701 StringRef &Res) const {
706 MachO::section_64 Sect = getSection64(Sec);
707 Offset = Sect.offset;
710 MachO::section Sect = getSection(Sec);
711 Offset = Sect.offset;
715 Res = this->getData().substr(Offset, Size);
716 return object_error::success;
719 std::error_code MachOObjectFile::getSectionAlignment(DataRefImpl Sec,
720 uint64_t &Res) const {
723 MachO::section_64 Sect = getSection64(Sec);
726 MachO::section Sect = getSection(Sec);
730 Res = uint64_t(1) << Align;
731 return object_error::success;
734 std::error_code MachOObjectFile::isSectionText(DataRefImpl Sec,
736 uint32_t Flags = getSectionFlags(this, Sec);
737 Res = Flags & MachO::S_ATTR_PURE_INSTRUCTIONS;
738 return object_error::success;
741 std::error_code MachOObjectFile::isSectionData(DataRefImpl Sec,
742 bool &Result) const {
743 uint32_t Flags = getSectionFlags(this, Sec);
744 unsigned SectionType = Flags & MachO::SECTION_TYPE;
745 Result = !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
746 !(SectionType == MachO::S_ZEROFILL ||
747 SectionType == MachO::S_GB_ZEROFILL);
748 return object_error::success;
751 std::error_code MachOObjectFile::isSectionBSS(DataRefImpl Sec,
752 bool &Result) const {
753 uint32_t Flags = getSectionFlags(this, Sec);
754 unsigned SectionType = Flags & MachO::SECTION_TYPE;
755 Result = !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
756 (SectionType == MachO::S_ZEROFILL ||
757 SectionType == MachO::S_GB_ZEROFILL);
758 return object_error::success;
762 MachOObjectFile::isSectionRequiredForExecution(DataRefImpl Sec,
763 bool &Result) const {
764 // FIXME: Unimplemented.
766 return object_error::success;
769 std::error_code MachOObjectFile::isSectionVirtual(DataRefImpl Sec,
770 bool &Result) const {
771 // FIXME: Unimplemented.
773 return object_error::success;
776 std::error_code MachOObjectFile::isSectionZeroInit(DataRefImpl Sec,
778 uint32_t Flags = getSectionFlags(this, Sec);
779 unsigned SectionType = Flags & MachO::SECTION_TYPE;
780 Res = SectionType == MachO::S_ZEROFILL ||
781 SectionType == MachO::S_GB_ZEROFILL;
782 return object_error::success;
785 std::error_code MachOObjectFile::isSectionReadOnlyData(DataRefImpl Sec,
786 bool &Result) const {
787 // Consider using the code from isSectionText to look for __const sections.
788 // Alternately, emit S_ATTR_PURE_INSTRUCTIONS and/or S_ATTR_SOME_INSTRUCTIONS
789 // to use section attributes to distinguish code from data.
791 // FIXME: Unimplemented.
793 return object_error::success;
796 std::error_code MachOObjectFile::sectionContainsSymbol(DataRefImpl Sec,
798 bool &Result) const {
800 this->getSymbolType(Symb, ST);
801 if (ST == SymbolRef::ST_Unknown) {
803 return object_error::success;
806 uint64_t SectBegin, SectEnd;
807 getSectionAddress(Sec, SectBegin);
808 getSectionSize(Sec, SectEnd);
809 SectEnd += SectBegin;
812 getSymbolAddress(Symb, SymAddr);
813 Result = (SymAddr >= SectBegin) && (SymAddr < SectEnd);
815 return object_error::success;
818 relocation_iterator MachOObjectFile::section_rel_begin(DataRefImpl Sec) const {
822 return relocation_iterator(RelocationRef(Ret, this));
826 MachOObjectFile::section_rel_end(DataRefImpl Sec) const {
829 MachO::section_64 Sect = getSection64(Sec);
832 MachO::section Sect = getSection(Sec);
839 return relocation_iterator(RelocationRef(Ret, this));
842 void MachOObjectFile::moveRelocationNext(DataRefImpl &Rel) const {
846 std::error_code MachOObjectFile::getRelocationAddress(DataRefImpl Rel,
847 uint64_t &Res) const {
849 getRelocationOffset(Rel, Offset);
854 getSectionAddress(Sec, SecAddress);
855 Res = SecAddress + Offset;
856 return object_error::success;
859 std::error_code MachOObjectFile::getRelocationOffset(DataRefImpl Rel,
860 uint64_t &Res) const {
861 assert(getHeader().filetype == MachO::MH_OBJECT &&
862 "Only implemented for MH_OBJECT");
863 MachO::any_relocation_info RE = getRelocation(Rel);
864 Res = getAnyRelocationAddress(RE);
865 return object_error::success;
869 MachOObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
870 MachO::any_relocation_info RE = getRelocation(Rel);
871 uint32_t SymbolIdx = getPlainRelocationSymbolNum(RE);
872 bool isExtern = getPlainRelocationExternal(RE);
876 MachO::symtab_command S = getSymtabLoadCommand();
877 unsigned SymbolTableEntrySize = is64Bit() ?
878 sizeof(MachO::nlist_64) :
879 sizeof(MachO::nlist);
880 uint64_t Offset = S.symoff + SymbolIdx * SymbolTableEntrySize;
882 Sym.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
883 return symbol_iterator(SymbolRef(Sym, this));
886 std::error_code MachOObjectFile::getRelocationType(DataRefImpl Rel,
887 uint64_t &Res) const {
888 MachO::any_relocation_info RE = getRelocation(Rel);
889 Res = getAnyRelocationType(RE);
890 return object_error::success;
894 MachOObjectFile::getRelocationTypeName(DataRefImpl Rel,
895 SmallVectorImpl<char> &Result) const {
898 getRelocationType(Rel, RType);
900 unsigned Arch = this->getArch();
904 static const char *const Table[] = {
905 "GENERIC_RELOC_VANILLA",
906 "GENERIC_RELOC_PAIR",
907 "GENERIC_RELOC_SECTDIFF",
908 "GENERIC_RELOC_PB_LA_PTR",
909 "GENERIC_RELOC_LOCAL_SECTDIFF",
910 "GENERIC_RELOC_TLV" };
918 case Triple::x86_64: {
919 static const char *const Table[] = {
920 "X86_64_RELOC_UNSIGNED",
921 "X86_64_RELOC_SIGNED",
922 "X86_64_RELOC_BRANCH",
923 "X86_64_RELOC_GOT_LOAD",
925 "X86_64_RELOC_SUBTRACTOR",
926 "X86_64_RELOC_SIGNED_1",
927 "X86_64_RELOC_SIGNED_2",
928 "X86_64_RELOC_SIGNED_4",
929 "X86_64_RELOC_TLV" };
938 static const char *const Table[] = {
941 "ARM_RELOC_SECTDIFF",
942 "ARM_RELOC_LOCAL_SECTDIFF",
943 "ARM_RELOC_PB_LA_PTR",
945 "ARM_THUMB_RELOC_BR22",
946 "ARM_THUMB_32BIT_BRANCH",
948 "ARM_RELOC_HALF_SECTDIFF" };
957 case Triple::aarch64: {
958 static const char *const Table[] = {
959 "ARM64_RELOC_UNSIGNED", "ARM64_RELOC_SUBTRACTOR",
960 "ARM64_RELOC_BRANCH26", "ARM64_RELOC_PAGE21",
961 "ARM64_RELOC_PAGEOFF12", "ARM64_RELOC_GOT_LOAD_PAGE21",
962 "ARM64_RELOC_GOT_LOAD_PAGEOFF12", "ARM64_RELOC_POINTER_TO_GOT",
963 "ARM64_RELOC_TLVP_LOAD_PAGE21", "ARM64_RELOC_TLVP_LOAD_PAGEOFF12",
967 if (RType >= array_lengthof(Table))
974 static const char *const Table[] = {
983 "PPC_RELOC_SECTDIFF",
984 "PPC_RELOC_PB_LA_PTR",
985 "PPC_RELOC_HI16_SECTDIFF",
986 "PPC_RELOC_LO16_SECTDIFF",
987 "PPC_RELOC_HA16_SECTDIFF",
989 "PPC_RELOC_LO14_SECTDIFF",
990 "PPC_RELOC_LOCAL_SECTDIFF" };
998 case Triple::UnknownArch:
1002 Result.append(res.begin(), res.end());
1003 return object_error::success;
1007 MachOObjectFile::getRelocationValueString(DataRefImpl Rel,
1008 SmallVectorImpl<char> &Result) const {
1009 MachO::any_relocation_info RE = getRelocation(Rel);
1011 unsigned Arch = this->getArch();
1014 raw_string_ostream fmt(fmtbuf);
1015 unsigned Type = this->getAnyRelocationType(RE);
1016 bool IsPCRel = this->getAnyRelocationPCRel(RE);
1018 // Determine any addends that should be displayed with the relocation.
1019 // These require decoding the relocation type, which is triple-specific.
1021 // X86_64 has entirely custom relocation types.
1022 if (Arch == Triple::x86_64) {
1023 bool isPCRel = getAnyRelocationPCRel(RE);
1026 case MachO::X86_64_RELOC_GOT_LOAD:
1027 case MachO::X86_64_RELOC_GOT: {
1028 printRelocationTargetName(this, RE, fmt);
1030 if (isPCRel) fmt << "PCREL";
1033 case MachO::X86_64_RELOC_SUBTRACTOR: {
1034 DataRefImpl RelNext = Rel;
1035 moveRelocationNext(RelNext);
1036 MachO::any_relocation_info RENext = getRelocation(RelNext);
1038 // X86_64_RELOC_SUBTRACTOR must be followed by a relocation of type
1039 // X86_64_RELOC_UNSIGNED.
1040 // NOTE: Scattered relocations don't exist on x86_64.
1041 unsigned RType = getAnyRelocationType(RENext);
1042 if (RType != MachO::X86_64_RELOC_UNSIGNED)
1043 report_fatal_error("Expected X86_64_RELOC_UNSIGNED after "
1044 "X86_64_RELOC_SUBTRACTOR.");
1046 // The X86_64_RELOC_UNSIGNED contains the minuend symbol;
1047 // X86_64_RELOC_SUBTRACTOR contains the subtrahend.
1048 printRelocationTargetName(this, RENext, fmt);
1050 printRelocationTargetName(this, RE, fmt);
1053 case MachO::X86_64_RELOC_TLV:
1054 printRelocationTargetName(this, RE, fmt);
1056 if (isPCRel) fmt << "P";
1058 case MachO::X86_64_RELOC_SIGNED_1:
1059 printRelocationTargetName(this, RE, fmt);
1062 case MachO::X86_64_RELOC_SIGNED_2:
1063 printRelocationTargetName(this, RE, fmt);
1066 case MachO::X86_64_RELOC_SIGNED_4:
1067 printRelocationTargetName(this, RE, fmt);
1071 printRelocationTargetName(this, RE, fmt);
1074 // X86 and ARM share some relocation types in common.
1075 } else if (Arch == Triple::x86 || Arch == Triple::arm ||
1076 Arch == Triple::ppc) {
1077 // Generic relocation types...
1079 case MachO::GENERIC_RELOC_PAIR: // prints no info
1080 return object_error::success;
1081 case MachO::GENERIC_RELOC_SECTDIFF: {
1082 DataRefImpl RelNext = Rel;
1083 moveRelocationNext(RelNext);
1084 MachO::any_relocation_info RENext = getRelocation(RelNext);
1086 // X86 sect diff's must be followed by a relocation of type
1087 // GENERIC_RELOC_PAIR.
1088 unsigned RType = getAnyRelocationType(RENext);
1090 if (RType != MachO::GENERIC_RELOC_PAIR)
1091 report_fatal_error("Expected GENERIC_RELOC_PAIR after "
1092 "GENERIC_RELOC_SECTDIFF.");
1094 printRelocationTargetName(this, RE, fmt);
1096 printRelocationTargetName(this, RENext, fmt);
1101 if (Arch == Triple::x86 || Arch == Triple::ppc) {
1103 case MachO::GENERIC_RELOC_LOCAL_SECTDIFF: {
1104 DataRefImpl RelNext = Rel;
1105 moveRelocationNext(RelNext);
1106 MachO::any_relocation_info RENext = getRelocation(RelNext);
1108 // X86 sect diff's must be followed by a relocation of type
1109 // GENERIC_RELOC_PAIR.
1110 unsigned RType = getAnyRelocationType(RENext);
1111 if (RType != MachO::GENERIC_RELOC_PAIR)
1112 report_fatal_error("Expected GENERIC_RELOC_PAIR after "
1113 "GENERIC_RELOC_LOCAL_SECTDIFF.");
1115 printRelocationTargetName(this, RE, fmt);
1117 printRelocationTargetName(this, RENext, fmt);
1120 case MachO::GENERIC_RELOC_TLV: {
1121 printRelocationTargetName(this, RE, fmt);
1123 if (IsPCRel) fmt << "P";
1127 printRelocationTargetName(this, RE, fmt);
1129 } else { // ARM-specific relocations
1131 case MachO::ARM_RELOC_HALF:
1132 case MachO::ARM_RELOC_HALF_SECTDIFF: {
1133 // Half relocations steal a bit from the length field to encode
1134 // whether this is an upper16 or a lower16 relocation.
1135 bool isUpper = getAnyRelocationLength(RE) >> 1;
1138 fmt << ":upper16:(";
1140 fmt << ":lower16:(";
1141 printRelocationTargetName(this, RE, fmt);
1143 DataRefImpl RelNext = Rel;
1144 moveRelocationNext(RelNext);
1145 MachO::any_relocation_info RENext = getRelocation(RelNext);
1147 // ARM half relocs must be followed by a relocation of type
1149 unsigned RType = getAnyRelocationType(RENext);
1150 if (RType != MachO::ARM_RELOC_PAIR)
1151 report_fatal_error("Expected ARM_RELOC_PAIR after "
1154 // NOTE: The half of the target virtual address is stashed in the
1155 // address field of the secondary relocation, but we can't reverse
1156 // engineer the constant offset from it without decoding the movw/movt
1157 // instruction to find the other half in its immediate field.
1159 // ARM_RELOC_HALF_SECTDIFF encodes the second section in the
1160 // symbol/section pointer of the follow-on relocation.
1161 if (Type == MachO::ARM_RELOC_HALF_SECTDIFF) {
1163 printRelocationTargetName(this, RENext, fmt);
1170 printRelocationTargetName(this, RE, fmt);
1175 printRelocationTargetName(this, RE, fmt);
1178 Result.append(fmtbuf.begin(), fmtbuf.end());
1179 return object_error::success;
1182 std::error_code MachOObjectFile::getRelocationHidden(DataRefImpl Rel,
1183 bool &Result) const {
1184 unsigned Arch = getArch();
1186 getRelocationType(Rel, Type);
1190 // On arches that use the generic relocations, GENERIC_RELOC_PAIR
1191 // is always hidden.
1192 if (Arch == Triple::x86 || Arch == Triple::arm || Arch == Triple::ppc) {
1193 if (Type == MachO::GENERIC_RELOC_PAIR) Result = true;
1194 } else if (Arch == Triple::x86_64) {
1195 // On x86_64, X86_64_RELOC_UNSIGNED is hidden only when it follows
1196 // an X86_64_RELOC_SUBTRACTOR.
1197 if (Type == MachO::X86_64_RELOC_UNSIGNED && Rel.d.a > 0) {
1198 DataRefImpl RelPrev = Rel;
1201 getRelocationType(RelPrev, PrevType);
1202 if (PrevType == MachO::X86_64_RELOC_SUBTRACTOR)
1207 return object_error::success;
1210 std::error_code MachOObjectFile::getLibraryNext(DataRefImpl LibData,
1211 LibraryRef &Res) const {
1212 report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
1215 std::error_code MachOObjectFile::getLibraryPath(DataRefImpl LibData,
1216 StringRef &Res) const {
1217 report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
1221 // guessLibraryShortName() is passed a name of a dynamic library and returns a
1222 // guess on what the short name is. Then name is returned as a substring of the
1223 // StringRef Name passed in. The name of the dynamic library is recognized as
1224 // a framework if it has one of the two following forms:
1225 // Foo.framework/Versions/A/Foo
1226 // Foo.framework/Foo
1227 // Where A and Foo can be any string. And may contain a trailing suffix
1228 // starting with an underbar. If the Name is recognized as a framework then
1229 // isFramework is set to true else it is set to false. If the Name has a
1230 // suffix then Suffix is set to the substring in Name that contains the suffix
1231 // else it is set to a NULL StringRef.
1233 // The Name of the dynamic library is recognized as a library name if it has
1234 // one of the two following forms:
1237 // The library may have a suffix trailing the name Foo of the form:
1238 // libFoo_profile.A.dylib
1239 // libFoo_profile.dylib
1241 // The Name of the dynamic library is also recognized as a library name if it
1242 // has the following form:
1245 // If the Name of the dynamic library is none of the forms above then a NULL
1246 // StringRef is returned.
1248 StringRef MachOObjectFile::guessLibraryShortName(StringRef Name,
1250 StringRef &Suffix) {
1251 StringRef Foo, F, DotFramework, V, Dylib, Lib, Dot, Qtx;
1252 size_t a, b, c, d, Idx;
1254 isFramework = false;
1255 Suffix = StringRef();
1257 // Pull off the last component and make Foo point to it
1258 a = Name.rfind('/');
1259 if (a == Name.npos || a == 0)
1261 Foo = Name.slice(a+1, Name.npos);
1263 // Look for a suffix starting with a '_'
1264 Idx = Foo.rfind('_');
1265 if (Idx != Foo.npos && Foo.size() >= 2) {
1266 Suffix = Foo.slice(Idx, Foo.npos);
1267 Foo = Foo.slice(0, Idx);
1270 // First look for the form Foo.framework/Foo
1271 b = Name.rfind('/', a);
1276 F = Name.slice(Idx, Idx + Foo.size());
1277 DotFramework = Name.slice(Idx + Foo.size(),
1278 Idx + Foo.size() + sizeof(".framework/")-1);
1279 if (F == Foo && DotFramework == ".framework/") {
1284 // Next look for the form Foo.framework/Versions/A/Foo
1287 c = Name.rfind('/', b);
1288 if (c == Name.npos || c == 0)
1290 V = Name.slice(c+1, Name.npos);
1291 if (!V.startswith("Versions/"))
1293 d = Name.rfind('/', c);
1298 F = Name.slice(Idx, Idx + Foo.size());
1299 DotFramework = Name.slice(Idx + Foo.size(),
1300 Idx + Foo.size() + sizeof(".framework/")-1);
1301 if (F == Foo && DotFramework == ".framework/") {
1307 // pull off the suffix after the "." and make a point to it
1308 a = Name.rfind('.');
1309 if (a == Name.npos || a == 0)
1311 Dylib = Name.slice(a, Name.npos);
1312 if (Dylib != ".dylib")
1315 // First pull off the version letter for the form Foo.A.dylib if any.
1317 Dot = Name.slice(a-2, a-1);
1322 b = Name.rfind('/', a);
1327 // ignore any suffix after an underbar like Foo_profile.A.dylib
1328 Idx = Name.find('_', b);
1329 if (Idx != Name.npos && Idx != b) {
1330 Lib = Name.slice(b, Idx);
1331 Suffix = Name.slice(Idx, a);
1334 Lib = Name.slice(b, a);
1335 // There are incorrect library names of the form:
1336 // libATS.A_profile.dylib so check for these.
1337 if (Lib.size() >= 3) {
1338 Dot = Lib.slice(Lib.size()-2, Lib.size()-1);
1340 Lib = Lib.slice(0, Lib.size()-2);
1345 Qtx = Name.slice(a, Name.npos);
1348 b = Name.rfind('/', a);
1350 Lib = Name.slice(0, a);
1352 Lib = Name.slice(b+1, a);
1353 // There are library names of the form: QT.A.qtx so check for these.
1354 if (Lib.size() >= 3) {
1355 Dot = Lib.slice(Lib.size()-2, Lib.size()-1);
1357 Lib = Lib.slice(0, Lib.size()-2);
1362 // getLibraryShortNameByIndex() is used to get the short name of the library
1363 // for an undefined symbol in a linked Mach-O binary that was linked with the
1364 // normal two-level namespace default (that is MH_TWOLEVEL in the header).
1365 // It is passed the index (0 - based) of the library as translated from
1366 // GET_LIBRARY_ORDINAL (1 - based).
1367 std::error_code MachOObjectFile::getLibraryShortNameByIndex(unsigned Index,
1369 if (Index >= Libraries.size())
1370 return object_error::parse_failed;
1372 MachO::dylib_command D =
1373 getStruct<MachO::dylib_command>(this, Libraries[Index]);
1374 if (D.dylib.name >= D.cmdsize)
1375 return object_error::parse_failed;
1377 // If the cache of LibrariesShortNames is not built up do that first for
1378 // all the Libraries.
1379 if (LibrariesShortNames.size() == 0) {
1380 for (unsigned i = 0; i < Libraries.size(); i++) {
1381 MachO::dylib_command D =
1382 getStruct<MachO::dylib_command>(this, Libraries[i]);
1383 if (D.dylib.name >= D.cmdsize) {
1384 LibrariesShortNames.push_back(StringRef());
1387 const char *P = (const char *)(Libraries[i]) + D.dylib.name;
1388 StringRef Name = StringRef(P);
1391 StringRef shortName = guessLibraryShortName(Name, isFramework, Suffix);
1392 if (shortName == StringRef())
1393 LibrariesShortNames.push_back(Name);
1395 LibrariesShortNames.push_back(shortName);
1399 Res = LibrariesShortNames[Index];
1400 return object_error::success;
1403 basic_symbol_iterator MachOObjectFile::symbol_begin_impl() const {
1404 return getSymbolByIndex(0);
1407 basic_symbol_iterator MachOObjectFile::symbol_end_impl() const {
1410 return basic_symbol_iterator(SymbolRef(DRI, this));
1412 MachO::symtab_command Symtab = getSymtabLoadCommand();
1413 unsigned SymbolTableEntrySize = is64Bit() ?
1414 sizeof(MachO::nlist_64) :
1415 sizeof(MachO::nlist);
1416 unsigned Offset = Symtab.symoff +
1417 Symtab.nsyms * SymbolTableEntrySize;
1418 DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
1419 return basic_symbol_iterator(SymbolRef(DRI, this));
1422 basic_symbol_iterator MachOObjectFile::getSymbolByIndex(unsigned Index) const {
1425 return basic_symbol_iterator(SymbolRef(DRI, this));
1427 MachO::symtab_command Symtab = getSymtabLoadCommand();
1428 assert(Index < Symtab.nsyms && "Requested symbol index is out of range.");
1429 unsigned SymbolTableEntrySize =
1430 is64Bit() ? sizeof(MachO::nlist_64) : sizeof(MachO::nlist);
1431 DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Symtab.symoff));
1432 DRI.p += Index * SymbolTableEntrySize;
1433 return basic_symbol_iterator(SymbolRef(DRI, this));
1436 section_iterator MachOObjectFile::section_begin() const {
1438 return section_iterator(SectionRef(DRI, this));
1441 section_iterator MachOObjectFile::section_end() const {
1443 DRI.d.a = Sections.size();
1444 return section_iterator(SectionRef(DRI, this));
1447 library_iterator MachOObjectFile::needed_library_begin() const {
1449 report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
1452 library_iterator MachOObjectFile::needed_library_end() const {
1454 report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
1457 uint8_t MachOObjectFile::getBytesInAddress() const {
1458 return is64Bit() ? 8 : 4;
1461 StringRef MachOObjectFile::getFileFormatName() const {
1462 unsigned CPUType = getCPUType(this);
1465 case llvm::MachO::CPU_TYPE_I386:
1466 return "Mach-O 32-bit i386";
1467 case llvm::MachO::CPU_TYPE_ARM:
1468 return "Mach-O arm";
1469 case llvm::MachO::CPU_TYPE_POWERPC:
1470 return "Mach-O 32-bit ppc";
1472 assert((CPUType & llvm::MachO::CPU_ARCH_ABI64) == 0 &&
1473 "64-bit object file when we're not 64-bit?");
1474 return "Mach-O 32-bit unknown";
1478 // Make sure the cpu type has the correct mask.
1479 assert((CPUType & llvm::MachO::CPU_ARCH_ABI64)
1480 == llvm::MachO::CPU_ARCH_ABI64 &&
1481 "32-bit object file when we're 64-bit?");
1484 case llvm::MachO::CPU_TYPE_X86_64:
1485 return "Mach-O 64-bit x86-64";
1486 case llvm::MachO::CPU_TYPE_ARM64:
1487 return "Mach-O arm64";
1488 case llvm::MachO::CPU_TYPE_POWERPC64:
1489 return "Mach-O 64-bit ppc64";
1491 return "Mach-O 64-bit unknown";
1495 Triple::ArchType MachOObjectFile::getArch(uint32_t CPUType) {
1497 case llvm::MachO::CPU_TYPE_I386:
1499 case llvm::MachO::CPU_TYPE_X86_64:
1500 return Triple::x86_64;
1501 case llvm::MachO::CPU_TYPE_ARM:
1503 case llvm::MachO::CPU_TYPE_ARM64:
1504 return Triple::arm64;
1505 case llvm::MachO::CPU_TYPE_POWERPC:
1507 case llvm::MachO::CPU_TYPE_POWERPC64:
1508 return Triple::ppc64;
1510 return Triple::UnknownArch;
1514 unsigned MachOObjectFile::getArch() const {
1515 return getArch(getCPUType(this));
1518 StringRef MachOObjectFile::getLoadName() const {
1520 report_fatal_error("get_load_name() unimplemented in MachOObjectFile");
1523 relocation_iterator MachOObjectFile::section_rel_begin(unsigned Index) const {
1526 return section_rel_begin(DRI);
1529 relocation_iterator MachOObjectFile::section_rel_end(unsigned Index) const {
1532 return section_rel_end(DRI);
1535 dice_iterator MachOObjectFile::begin_dices() const {
1537 if (!DataInCodeLoadCmd)
1538 return dice_iterator(DiceRef(DRI, this));
1540 MachO::linkedit_data_command DicLC = getDataInCodeLoadCommand();
1541 DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, DicLC.dataoff));
1542 return dice_iterator(DiceRef(DRI, this));
1545 dice_iterator MachOObjectFile::end_dices() const {
1547 if (!DataInCodeLoadCmd)
1548 return dice_iterator(DiceRef(DRI, this));
1550 MachO::linkedit_data_command DicLC = getDataInCodeLoadCommand();
1551 unsigned Offset = DicLC.dataoff + DicLC.datasize;
1552 DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
1553 return dice_iterator(DiceRef(DRI, this));
1557 MachOObjectFile::getSectionFinalSegmentName(DataRefImpl Sec) const {
1558 ArrayRef<char> Raw = getSectionRawFinalSegmentName(Sec);
1559 return parseSegmentOrSectionName(Raw.data());
1563 MachOObjectFile::getSectionRawName(DataRefImpl Sec) const {
1564 const section_base *Base =
1565 reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
1566 return ArrayRef<char>(Base->sectname);
1570 MachOObjectFile::getSectionRawFinalSegmentName(DataRefImpl Sec) const {
1571 const section_base *Base =
1572 reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
1573 return ArrayRef<char>(Base->segname);
1577 MachOObjectFile::isRelocationScattered(const MachO::any_relocation_info &RE)
1579 if (getCPUType(this) == MachO::CPU_TYPE_X86_64)
1581 return getPlainRelocationAddress(RE) & MachO::R_SCATTERED;
1584 unsigned MachOObjectFile::getPlainRelocationSymbolNum(
1585 const MachO::any_relocation_info &RE) const {
1586 if (isLittleEndian())
1587 return RE.r_word1 & 0xffffff;
1588 return RE.r_word1 >> 8;
1591 bool MachOObjectFile::getPlainRelocationExternal(
1592 const MachO::any_relocation_info &RE) const {
1593 if (isLittleEndian())
1594 return (RE.r_word1 >> 27) & 1;
1595 return (RE.r_word1 >> 4) & 1;
1598 bool MachOObjectFile::getScatteredRelocationScattered(
1599 const MachO::any_relocation_info &RE) const {
1600 return RE.r_word0 >> 31;
1603 uint32_t MachOObjectFile::getScatteredRelocationValue(
1604 const MachO::any_relocation_info &RE) const {
1608 unsigned MachOObjectFile::getAnyRelocationAddress(
1609 const MachO::any_relocation_info &RE) const {
1610 if (isRelocationScattered(RE))
1611 return getScatteredRelocationAddress(RE);
1612 return getPlainRelocationAddress(RE);
1615 unsigned MachOObjectFile::getAnyRelocationPCRel(
1616 const MachO::any_relocation_info &RE) const {
1617 if (isRelocationScattered(RE))
1618 return getScatteredRelocationPCRel(this, RE);
1619 return getPlainRelocationPCRel(this, RE);
1622 unsigned MachOObjectFile::getAnyRelocationLength(
1623 const MachO::any_relocation_info &RE) const {
1624 if (isRelocationScattered(RE))
1625 return getScatteredRelocationLength(RE);
1626 return getPlainRelocationLength(this, RE);
1630 MachOObjectFile::getAnyRelocationType(
1631 const MachO::any_relocation_info &RE) const {
1632 if (isRelocationScattered(RE))
1633 return getScatteredRelocationType(RE);
1634 return getPlainRelocationType(this, RE);
1638 MachOObjectFile::getRelocationSection(
1639 const MachO::any_relocation_info &RE) const {
1640 if (isRelocationScattered(RE) || getPlainRelocationExternal(RE))
1641 return *section_end();
1642 unsigned SecNum = getPlainRelocationSymbolNum(RE) - 1;
1645 return SectionRef(DRI, this);
1648 MachOObjectFile::LoadCommandInfo
1649 MachOObjectFile::getFirstLoadCommandInfo() const {
1650 MachOObjectFile::LoadCommandInfo Load;
1652 unsigned HeaderSize = is64Bit() ? sizeof(MachO::mach_header_64) :
1653 sizeof(MachO::mach_header);
1654 Load.Ptr = getPtr(this, HeaderSize);
1655 Load.C = getStruct<MachO::load_command>(this, Load.Ptr);
1659 MachOObjectFile::LoadCommandInfo
1660 MachOObjectFile::getNextLoadCommandInfo(const LoadCommandInfo &L) const {
1661 MachOObjectFile::LoadCommandInfo Next;
1662 Next.Ptr = L.Ptr + L.C.cmdsize;
1663 Next.C = getStruct<MachO::load_command>(this, Next.Ptr);
1667 MachO::section MachOObjectFile::getSection(DataRefImpl DRI) const {
1668 return getStruct<MachO::section>(this, Sections[DRI.d.a]);
1671 MachO::section_64 MachOObjectFile::getSection64(DataRefImpl DRI) const {
1672 return getStruct<MachO::section_64>(this, Sections[DRI.d.a]);
1675 MachO::section MachOObjectFile::getSection(const LoadCommandInfo &L,
1676 unsigned Index) const {
1677 const char *Sec = getSectionPtr(this, L, Index);
1678 return getStruct<MachO::section>(this, Sec);
1681 MachO::section_64 MachOObjectFile::getSection64(const LoadCommandInfo &L,
1682 unsigned Index) const {
1683 const char *Sec = getSectionPtr(this, L, Index);
1684 return getStruct<MachO::section_64>(this, Sec);
1688 MachOObjectFile::getSymbolTableEntry(DataRefImpl DRI) const {
1689 const char *P = reinterpret_cast<const char *>(DRI.p);
1690 return getStruct<MachO::nlist>(this, P);
1694 MachOObjectFile::getSymbol64TableEntry(DataRefImpl DRI) const {
1695 const char *P = reinterpret_cast<const char *>(DRI.p);
1696 return getStruct<MachO::nlist_64>(this, P);
1699 MachO::linkedit_data_command
1700 MachOObjectFile::getLinkeditDataLoadCommand(const LoadCommandInfo &L) const {
1701 return getStruct<MachO::linkedit_data_command>(this, L.Ptr);
1704 MachO::segment_command
1705 MachOObjectFile::getSegmentLoadCommand(const LoadCommandInfo &L) const {
1706 return getStruct<MachO::segment_command>(this, L.Ptr);
1709 MachO::segment_command_64
1710 MachOObjectFile::getSegment64LoadCommand(const LoadCommandInfo &L) const {
1711 return getStruct<MachO::segment_command_64>(this, L.Ptr);
1714 MachO::linker_options_command
1715 MachOObjectFile::getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const {
1716 return getStruct<MachO::linker_options_command>(this, L.Ptr);
1719 MachO::version_min_command
1720 MachOObjectFile::getVersionMinLoadCommand(const LoadCommandInfo &L) const {
1721 return getStruct<MachO::version_min_command>(this, L.Ptr);
1724 MachO::any_relocation_info
1725 MachOObjectFile::getRelocation(DataRefImpl Rel) const {
1730 MachO::section_64 Sect = getSection64(Sec);
1731 Offset = Sect.reloff;
1733 MachO::section Sect = getSection(Sec);
1734 Offset = Sect.reloff;
1737 auto P = reinterpret_cast<const MachO::any_relocation_info *>(
1738 getPtr(this, Offset)) + Rel.d.b;
1739 return getStruct<MachO::any_relocation_info>(
1740 this, reinterpret_cast<const char *>(P));
1743 MachO::data_in_code_entry
1744 MachOObjectFile::getDice(DataRefImpl Rel) const {
1745 const char *P = reinterpret_cast<const char *>(Rel.p);
1746 return getStruct<MachO::data_in_code_entry>(this, P);
1749 MachO::mach_header MachOObjectFile::getHeader() const {
1750 return getStruct<MachO::mach_header>(this, getPtr(this, 0));
1753 MachO::mach_header_64 MachOObjectFile::getHeader64() const {
1754 return getStruct<MachO::mach_header_64>(this, getPtr(this, 0));
1757 uint32_t MachOObjectFile::getIndirectSymbolTableEntry(
1758 const MachO::dysymtab_command &DLC,
1759 unsigned Index) const {
1760 uint64_t Offset = DLC.indirectsymoff + Index * sizeof(uint32_t);
1761 return getStruct<uint32_t>(this, getPtr(this, Offset));
1764 MachO::data_in_code_entry
1765 MachOObjectFile::getDataInCodeTableEntry(uint32_t DataOffset,
1766 unsigned Index) const {
1767 uint64_t Offset = DataOffset + Index * sizeof(MachO::data_in_code_entry);
1768 return getStruct<MachO::data_in_code_entry>(this, getPtr(this, Offset));
1771 MachO::symtab_command MachOObjectFile::getSymtabLoadCommand() const {
1772 return getStruct<MachO::symtab_command>(this, SymtabLoadCmd);
1775 MachO::dysymtab_command MachOObjectFile::getDysymtabLoadCommand() const {
1776 return getStruct<MachO::dysymtab_command>(this, DysymtabLoadCmd);
1779 MachO::linkedit_data_command
1780 MachOObjectFile::getDataInCodeLoadCommand() const {
1781 if (DataInCodeLoadCmd)
1782 return getStruct<MachO::linkedit_data_command>(this, DataInCodeLoadCmd);
1784 // If there is no DataInCodeLoadCmd return a load command with zero'ed fields.
1785 MachO::linkedit_data_command Cmd;
1786 Cmd.cmd = MachO::LC_DATA_IN_CODE;
1787 Cmd.cmdsize = sizeof(MachO::linkedit_data_command);
1793 StringRef MachOObjectFile::getStringTableData() const {
1794 MachO::symtab_command S = getSymtabLoadCommand();
1795 return getData().substr(S.stroff, S.strsize);
1798 bool MachOObjectFile::is64Bit() const {
1799 return getType() == getMachOType(false, true) ||
1800 getType() == getMachOType(true, true);
1803 void MachOObjectFile::ReadULEB128s(uint64_t Index,
1804 SmallVectorImpl<uint64_t> &Out) const {
1805 DataExtractor extractor(ObjectFile::getData(), true, 0);
1807 uint32_t offset = Index;
1809 while (uint64_t delta = extractor.getULEB128(&offset)) {
1811 Out.push_back(data);
1815 ErrorOr<ObjectFile *> ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer,
1817 StringRef Magic = Buffer->getBuffer().slice(0, 4);
1819 std::unique_ptr<MachOObjectFile> Ret;
1820 if (Magic == "\xFE\xED\xFA\xCE")
1821 Ret.reset(new MachOObjectFile(Buffer, false, false, EC, BufferOwned));
1822 else if (Magic == "\xCE\xFA\xED\xFE")
1823 Ret.reset(new MachOObjectFile(Buffer, true, false, EC, BufferOwned));
1824 else if (Magic == "\xFE\xED\xFA\xCF")
1825 Ret.reset(new MachOObjectFile(Buffer, false, true, EC, BufferOwned));
1826 else if (Magic == "\xCF\xFA\xED\xFE")
1827 Ret.reset(new MachOObjectFile(Buffer, true, true, EC, BufferOwned));
1830 return object_error::parse_failed;
1835 return Ret.release();
1838 } // end namespace object
1839 } // end namespace llvm