#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/DataExtractor.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Host.h"
+#include "llvm/Support/LEB128.h"
+#include "llvm/Support/MachO.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <cctype>
};
}
-template<typename T>
+template <typename T>
static T getStruct(const MachOObjectFile *O, const char *P) {
+ // Don't read before the beginning or past the end of the file
+ if (P < O->getData().begin() || P + sizeof(T) > O->getData().end())
+ report_fatal_error("Malformed MachO file.");
+
T Cmd;
memcpy(&Cmd, P, sizeof(T));
if (O->isLittleEndian() != sys::IsLittleEndianHost)
return Cmd;
}
+template <typename SegmentCmd>
+static uint32_t getSegmentLoadCommandNumSections(const SegmentCmd &S,
+ uint32_t Cmdsize) {
+ const unsigned SectionSize = sizeof(SegmentCmd);
+ if (S.nsects > std::numeric_limits<uint32_t>::max() / SectionSize ||
+ S.nsects * SectionSize > Cmdsize - sizeof(S))
+ report_fatal_error(
+ "Number of sections too large for size of load command.");
+ return S.nsects;
+}
+
static uint32_t
getSegmentLoadCommandNumSections(const MachOObjectFile *O,
const MachOObjectFile::LoadCommandInfo &L) {
+ if (O->is64Bit())
+ return getSegmentLoadCommandNumSections(O->getSegment64LoadCommand(L),
+ L.C.cmdsize);
+
+ return getSegmentLoadCommandNumSections(O->getSegmentLoadCommand(L),
+ L.C.cmdsize);
+}
+
+static bool isPageZeroSegment(const MachOObjectFile *O,
+ const MachOObjectFile::LoadCommandInfo &L) {
if (O->is64Bit()) {
MachO::segment_command_64 S = O->getSegment64LoadCommand(L);
- return S.nsects;
+ return StringRef("__PAGEZERO").equals(S.segname);
}
MachO::segment_command S = O->getSegmentLoadCommand(L);
- return S.nsects;
+ return StringRef("__PAGEZERO").equals(S.segname);
}
+
static const char *
getSectionPtr(const MachOObjectFile *O, MachOObjectFile::LoadCommandInfo L,
unsigned Sec) {
// to find a section beginning instead.
for (const SectionRef &Section : O->sections()) {
std::error_code ec;
- uint64_t Addr;
- StringRef Name;
- if ((ec = Section.getAddress(Addr)))
- report_fatal_error(ec.message());
+ StringRef Name;
+ uint64_t Addr = Section.getAddress();
if (Addr != Val)
continue;
if ((ec = Section.getName(Name)))
return RE.r_word1 & 0xf;
}
-static unsigned
-getScatteredRelocationType(const MachO::any_relocation_info &RE) {
- return (RE.r_word0 >> 24) & 0xf;
-}
-
static uint32_t getSectionFlags(const MachOObjectFile *O,
DataRefImpl Sec) {
if (O->is64Bit()) {
bool Is64bits, std::error_code &EC)
: ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object),
SymtabLoadCmd(nullptr), DysymtabLoadCmd(nullptr),
- DataInCodeLoadCmd(nullptr) {
+ DataInCodeLoadCmd(nullptr), LinkOptHintsLoadCmd(nullptr),
+ DyldInfoLoadCmd(nullptr), UuidLoadCmd(nullptr),
+ HasPageZeroSegment(false) {
uint32_t LoadCommandCount = this->getHeader().ncmds;
+ if (LoadCommandCount == 0)
+ return;
+
MachO::LoadCommandType SegmentLoadType = is64Bit() ?
MachO::LC_SEGMENT_64 : MachO::LC_SEGMENT;
MachOObjectFile::LoadCommandInfo Load = getFirstLoadCommandInfo();
for (unsigned I = 0; ; ++I) {
if (Load.C.cmd == MachO::LC_SYMTAB) {
- assert(!SymtabLoadCmd && "Multiple symbol tables");
+ // Multiple symbol tables
+ if (SymtabLoadCmd) {
+ EC = object_error::parse_failed;
+ return;
+ }
SymtabLoadCmd = Load.Ptr;
} else if (Load.C.cmd == MachO::LC_DYSYMTAB) {
- assert(!DysymtabLoadCmd && "Multiple dynamic symbol tables");
+ // Multiple dynamic symbol tables
+ if (DysymtabLoadCmd) {
+ EC = object_error::parse_failed;
+ return;
+ }
DysymtabLoadCmd = Load.Ptr;
} else if (Load.C.cmd == MachO::LC_DATA_IN_CODE) {
- assert(!DataInCodeLoadCmd && "Multiple data in code tables");
+ // Multiple data in code tables
+ if (DataInCodeLoadCmd) {
+ EC = object_error::parse_failed;
+ return;
+ }
DataInCodeLoadCmd = Load.Ptr;
+ } else if (Load.C.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT) {
+ // Multiple linker optimization hint tables
+ if (LinkOptHintsLoadCmd) {
+ EC = object_error::parse_failed;
+ return;
+ }
+ LinkOptHintsLoadCmd = Load.Ptr;
+ } else if (Load.C.cmd == MachO::LC_DYLD_INFO ||
+ Load.C.cmd == MachO::LC_DYLD_INFO_ONLY) {
+ // Multiple dyldinfo load commands
+ if (DyldInfoLoadCmd) {
+ EC = object_error::parse_failed;
+ return;
+ }
+ DyldInfoLoadCmd = Load.Ptr;
+ } else if (Load.C.cmd == MachO::LC_UUID) {
+ // Multiple UUID load commands
+ if (UuidLoadCmd) {
+ EC = object_error::parse_failed;
+ return;
+ }
+ UuidLoadCmd = Load.Ptr;
} else if (Load.C.cmd == SegmentLoadType) {
+ const unsigned SegmentLoadSize = this->is64Bit()
+ ? sizeof(MachO::segment_command_64)
+ : sizeof(MachO::segment_command);
+ if (Load.C.cmdsize < SegmentLoadSize)
+ report_fatal_error("Segment load command size is too small.");
+
uint32_t NumSections = getSegmentLoadCommandNumSections(this, Load);
for (unsigned J = 0; J < NumSections; ++J) {
const char *Sec = getSectionPtr(this, Load, J);
Sections.push_back(Sec);
}
+ if (isPageZeroSegment(this, Load))
+ HasPageZeroSegment = true;
} else if (Load.C.cmd == MachO::LC_LOAD_DYLIB ||
Load.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||
Load.C.cmd == MachO::LC_LAZY_LOAD_DYLIB ||
StringRef StringTable = getStringTableData();
MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
const char *Start = &StringTable.data()[Entry.n_strx];
+ if (Start < getData().begin() || Start >= getData().end())
+ report_fatal_error(
+ "Symbol name entry points before beginning or past end of file.");
Res = StringRef(Start);
return object_error::success;
}
+unsigned MachOObjectFile::getSectionType(SectionRef Sec) const {
+ DataRefImpl DRI = Sec.getRawDataRefImpl();
+ uint32_t Flags = getSectionFlags(this, DRI);
+ return Flags & MachO::SECTION_TYPE;
+}
+
// getIndirectName() returns the name of the alias'ed symbol who's string table
// index is in the n_value field.
std::error_code MachOObjectFile::getIndirectName(DataRefImpl Symb,
EndOffset = Value;
}
if (!EndOffset) {
- uint64_t Size;
DataRefImpl Sec;
Sec.d.a = SectionIndex-1;
- getSectionSize(Sec, Size);
- getSectionAddress(Sec, EndOffset);
+ uint64_t Size = getSectionSize(Sec);
+ EndOffset = getSectionAddress(Sec);
EndOffset += Size;
}
Result = EndOffset - BeginOffset;
if (Value && Value != UnknownAddressOrSize)
Result |= SymbolRef::SF_Common;
}
+
+ if (!(MachOType & MachO::N_PEXT))
+ Result |= SymbolRef::SF_Exported;
}
if (MachOFlags & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
return object_error::success;
}
-std::error_code MachOObjectFile::getSectionAddress(DataRefImpl Sec,
- uint64_t &Res) const {
- if (is64Bit()) {
- MachO::section_64 Sect = getSection64(Sec);
- Res = Sect.addr;
- } else {
- MachO::section Sect = getSection(Sec);
- Res = Sect.addr;
- }
- return object_error::success;
+uint64_t MachOObjectFile::getSectionAddress(DataRefImpl Sec) const {
+ if (is64Bit())
+ return getSection64(Sec).addr;
+ return getSection(Sec).addr;
}
-std::error_code MachOObjectFile::getSectionSize(DataRefImpl Sec,
- uint64_t &Res) const {
- if (is64Bit()) {
- MachO::section_64 Sect = getSection64(Sec);
- Res = Sect.size;
- } else {
- MachO::section Sect = getSection(Sec);
- Res = Sect.size;
- }
-
- return object_error::success;
+uint64_t MachOObjectFile::getSectionSize(DataRefImpl Sec) const {
+ if (is64Bit())
+ return getSection64(Sec).size;
+ return getSection(Sec).size;
}
std::error_code MachOObjectFile::getSectionContents(DataRefImpl Sec,
return object_error::success;
}
-std::error_code MachOObjectFile::getSectionAlignment(DataRefImpl Sec,
- uint64_t &Res) const {
+uint64_t MachOObjectFile::getSectionAlignment(DataRefImpl Sec) const {
uint32_t Align;
if (is64Bit()) {
MachO::section_64 Sect = getSection64(Sec);
Align = Sect.align;
}
- Res = uint64_t(1) << Align;
- return object_error::success;
+ return uint64_t(1) << Align;
}
-std::error_code MachOObjectFile::isSectionText(DataRefImpl Sec,
- bool &Res) const {
+bool MachOObjectFile::isSectionText(DataRefImpl Sec) const {
uint32_t Flags = getSectionFlags(this, Sec);
- Res = Flags & MachO::S_ATTR_PURE_INSTRUCTIONS;
- return object_error::success;
+ return Flags & MachO::S_ATTR_PURE_INSTRUCTIONS;
}
-std::error_code MachOObjectFile::isSectionData(DataRefImpl Sec,
- bool &Result) const {
+bool MachOObjectFile::isSectionData(DataRefImpl Sec) const {
uint32_t Flags = getSectionFlags(this, Sec);
unsigned SectionType = Flags & MachO::SECTION_TYPE;
- Result = !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
- !(SectionType == MachO::S_ZEROFILL ||
- SectionType == MachO::S_GB_ZEROFILL);
- return object_error::success;
+ return !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
+ !(SectionType == MachO::S_ZEROFILL ||
+ SectionType == MachO::S_GB_ZEROFILL);
}
-std::error_code MachOObjectFile::isSectionBSS(DataRefImpl Sec,
- bool &Result) const {
+bool MachOObjectFile::isSectionBSS(DataRefImpl Sec) const {
uint32_t Flags = getSectionFlags(this, Sec);
unsigned SectionType = Flags & MachO::SECTION_TYPE;
- Result = !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
- (SectionType == MachO::S_ZEROFILL ||
- SectionType == MachO::S_GB_ZEROFILL);
- return object_error::success;
+ return !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
+ (SectionType == MachO::S_ZEROFILL ||
+ SectionType == MachO::S_GB_ZEROFILL);
}
-std::error_code
-MachOObjectFile::isSectionRequiredForExecution(DataRefImpl Sec,
- bool &Result) const {
+bool MachOObjectFile::isSectionVirtual(DataRefImpl Sec) const {
// FIXME: Unimplemented.
- Result = true;
- return object_error::success;
+ return false;
}
-std::error_code MachOObjectFile::isSectionVirtual(DataRefImpl Sec,
- bool &Result) const {
- // FIXME: Unimplemented.
- Result = false;
- return object_error::success;
-}
-
-std::error_code MachOObjectFile::isSectionZeroInit(DataRefImpl Sec,
- bool &Res) const {
- uint32_t Flags = getSectionFlags(this, Sec);
- unsigned SectionType = Flags & MachO::SECTION_TYPE;
- Res = SectionType == MachO::S_ZEROFILL ||
- SectionType == MachO::S_GB_ZEROFILL;
- return object_error::success;
-}
-
-std::error_code MachOObjectFile::isSectionReadOnlyData(DataRefImpl Sec,
- bool &Result) const {
- // Consider using the code from isSectionText to look for __const sections.
- // Alternately, emit S_ATTR_PURE_INSTRUCTIONS and/or S_ATTR_SOME_INSTRUCTIONS
- // to use section attributes to distinguish code from data.
-
- // FIXME: Unimplemented.
- Result = false;
- return object_error::success;
-}
-
-std::error_code MachOObjectFile::sectionContainsSymbol(DataRefImpl Sec,
- DataRefImpl Symb,
- bool &Result) const {
+bool MachOObjectFile::sectionContainsSymbol(DataRefImpl Sec,
+ DataRefImpl Symb) const {
SymbolRef::Type ST;
this->getSymbolType(Symb, ST);
- if (ST == SymbolRef::ST_Unknown) {
- Result = false;
- return object_error::success;
- }
+ if (ST == SymbolRef::ST_Unknown)
+ return false;
- uint64_t SectBegin, SectEnd;
- getSectionAddress(Sec, SectBegin);
- getSectionSize(Sec, SectEnd);
+ uint64_t SectBegin = getSectionAddress(Sec);
+ uint64_t SectEnd = getSectionSize(Sec);
SectEnd += SectBegin;
uint64_t SymAddr;
getSymbolAddress(Symb, SymAddr);
- Result = (SymAddr >= SectBegin) && (SymAddr < SectEnd);
-
- return object_error::success;
+ return (SymAddr >= SectBegin) && (SymAddr < SectEnd);
}
relocation_iterator MachOObjectFile::section_rel_begin(DataRefImpl Sec) const {
DataRefImpl Sec;
Sec.d.a = Rel.d.a;
- uint64_t SecAddress;
- getSectionAddress(Sec, SecAddress);
+ uint64_t SecAddress = getSectionAddress(Sec);
Res = SecAddress + Offset;
return object_error::success;
}
// It is passed the index (0 - based) of the library as translated from
// GET_LIBRARY_ORDINAL (1 - based).
std::error_code MachOObjectFile::getLibraryShortNameByIndex(unsigned Index,
- StringRef &Res) {
+ StringRef &Res) const {
if (Index >= Libraries.size())
return object_error::parse_failed;
- MachO::dylib_command D =
- getStruct<MachO::dylib_command>(this, Libraries[Index]);
- if (D.dylib.name >= D.cmdsize)
- return object_error::parse_failed;
-
// If the cache of LibrariesShortNames is not built up do that first for
// all the Libraries.
if (LibrariesShortNames.size() == 0) {
for (unsigned i = 0; i < Libraries.size(); i++) {
MachO::dylib_command D =
getStruct<MachO::dylib_command>(this, Libraries[i]);
- if (D.dylib.name >= D.cmdsize) {
- LibrariesShortNames.push_back(StringRef());
- continue;
- }
+ if (D.dylib.name >= D.cmdsize)
+ return object_error::parse_failed;
const char *P = (const char *)(Libraries[i]) + D.dylib.name;
StringRef Name = StringRef(P);
+ if (D.dylib.name+Name.size() >= D.cmdsize)
+ return object_error::parse_failed;
StringRef Suffix;
bool isFramework;
StringRef shortName = guessLibraryShortName(Name, isFramework, Suffix);
- if (shortName == StringRef())
+ if (shortName.empty())
LibrariesShortNames.push_back(Name);
else
LibrariesShortNames.push_back(shortName);
return basic_symbol_iterator(SymbolRef(DRI, this));
MachO::symtab_command Symtab = getSymtabLoadCommand();
- assert(Index < Symtab.nsyms && "Requested symbol index is out of range.");
+ if (Index >= Symtab.nsyms)
+ report_fatal_error("Requested symbol index is out of range.");
unsigned SymbolTableEntrySize =
is64Bit() ? sizeof(MachO::nlist_64) : sizeof(MachO::nlist);
DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Symtab.symoff));
case llvm::MachO::CPU_TYPE_POWERPC:
return "Mach-O 32-bit ppc";
default:
- assert((CPUType & llvm::MachO::CPU_ARCH_ABI64) == 0 &&
- "64-bit object file when we're not 64-bit?");
return "Mach-O 32-bit unknown";
}
}
- // Make sure the cpu type has the correct mask.
- assert((CPUType & llvm::MachO::CPU_ARCH_ABI64)
- == llvm::MachO::CPU_ARCH_ABI64 &&
- "32-bit object file when we're 64-bit?");
-
switch (CPUType) {
case llvm::MachO::CPU_TYPE_X86_64:
return "Mach-O 64-bit x86-64";
return dice_iterator(DiceRef(DRI, this));
}
+ExportEntry::ExportEntry(ArrayRef<uint8_t> T)
+ : Trie(T), Malformed(false), Done(false) { }
+
+void ExportEntry::moveToFirst() {
+ pushNode(0);
+ pushDownUntilBottom();
+}
+
+void ExportEntry::moveToEnd() {
+ Stack.clear();
+ Done = true;
+}
+
+bool ExportEntry::operator==(const ExportEntry &Other) const {
+ // Common case, one at end, other iterating from begin.
+ if (Done || Other.Done)
+ return (Done == Other.Done);
+ // Not equal if different stack sizes.
+ if (Stack.size() != Other.Stack.size())
+ return false;
+ // Not equal if different cumulative strings.
+ if (!CumulativeString.str().equals(Other.CumulativeString.str()))
+ return false;
+ // Equal if all nodes in both stacks match.
+ for (unsigned i=0; i < Stack.size(); ++i) {
+ if (Stack[i].Start != Other.Stack[i].Start)
+ return false;
+ }
+ return true;
+}
+
+uint64_t ExportEntry::readULEB128(const uint8_t *&Ptr) {
+ unsigned Count;
+ uint64_t Result = decodeULEB128(Ptr, &Count);
+ Ptr += Count;
+ if (Ptr > Trie.end()) {
+ Ptr = Trie.end();
+ Malformed = true;
+ }
+ return Result;
+}
+
+StringRef ExportEntry::name() const {
+ return CumulativeString.str();
+}
+
+uint64_t ExportEntry::flags() const {
+ return Stack.back().Flags;
+}
+
+uint64_t ExportEntry::address() const {
+ return Stack.back().Address;
+}
+
+uint64_t ExportEntry::other() const {
+ return Stack.back().Other;
+}
+
+StringRef ExportEntry::otherName() const {
+ const char* ImportName = Stack.back().ImportName;
+ if (ImportName)
+ return StringRef(ImportName);
+ return StringRef();
+}
+
+uint32_t ExportEntry::nodeOffset() const {
+ return Stack.back().Start - Trie.begin();
+}
+
+ExportEntry::NodeState::NodeState(const uint8_t *Ptr)
+ : Start(Ptr), Current(Ptr), Flags(0), Address(0), Other(0),
+ ImportName(nullptr), ChildCount(0), NextChildIndex(0),
+ ParentStringLength(0), IsExportNode(false) {
+}
+
+void ExportEntry::pushNode(uint64_t offset) {
+ const uint8_t *Ptr = Trie.begin() + offset;
+ NodeState State(Ptr);
+ uint64_t ExportInfoSize = readULEB128(State.Current);
+ State.IsExportNode = (ExportInfoSize != 0);
+ const uint8_t* Children = State.Current + ExportInfoSize;
+ if (State.IsExportNode) {
+ State.Flags = readULEB128(State.Current);
+ if (State.Flags & MachO::EXPORT_SYMBOL_FLAGS_REEXPORT) {
+ State.Address = 0;
+ State.Other = readULEB128(State.Current); // dylib ordinal
+ State.ImportName = reinterpret_cast<const char*>(State.Current);
+ } else {
+ State.Address = readULEB128(State.Current);
+ if (State.Flags & MachO::EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER)
+ State.Other = readULEB128(State.Current);
+ }
+ }
+ State.ChildCount = *Children;
+ State.Current = Children + 1;
+ State.NextChildIndex = 0;
+ State.ParentStringLength = CumulativeString.size();
+ Stack.push_back(State);
+}
+
+void ExportEntry::pushDownUntilBottom() {
+ while (Stack.back().NextChildIndex < Stack.back().ChildCount) {
+ NodeState &Top = Stack.back();
+ CumulativeString.resize(Top.ParentStringLength);
+ for (;*Top.Current != 0; Top.Current++) {
+ char C = *Top.Current;
+ CumulativeString.push_back(C);
+ }
+ Top.Current += 1;
+ uint64_t childNodeIndex = readULEB128(Top.Current);
+ Top.NextChildIndex += 1;
+ pushNode(childNodeIndex);
+ }
+ if (!Stack.back().IsExportNode) {
+ Malformed = true;
+ moveToEnd();
+ }
+}
+
+// We have a trie data structure and need a way to walk it that is compatible
+// with the C++ iterator model. The solution is a non-recursive depth first
+// traversal where the iterator contains a stack of parent nodes along with a
+// string that is the accumulation of all edge strings along the parent chain
+// to this point.
+//
+// There is one "export" node for each exported symbol. But because some
+// symbols may be a prefix of another symbol (e.g. _dup and _dup2), an export
+// node may have child nodes too.
+//
+// The algorithm for moveNext() is to keep moving down the leftmost unvisited
+// child until hitting a node with no children (which is an export node or
+// else the trie is malformed). On the way down, each node is pushed on the
+// stack ivar. If there is no more ways down, it pops up one and tries to go
+// down a sibling path until a childless node is reached.
+void ExportEntry::moveNext() {
+ if (Stack.empty() || !Stack.back().IsExportNode) {
+ Malformed = true;
+ moveToEnd();
+ return;
+ }
+
+ Stack.pop_back();
+ while (!Stack.empty()) {
+ NodeState &Top = Stack.back();
+ if (Top.NextChildIndex < Top.ChildCount) {
+ pushDownUntilBottom();
+ // Now at the next export node.
+ return;
+ } else {
+ if (Top.IsExportNode) {
+ // This node has no children but is itself an export node.
+ CumulativeString.resize(Top.ParentStringLength);
+ return;
+ }
+ Stack.pop_back();
+ }
+ }
+ Done = true;
+}
+
+iterator_range<export_iterator>
+MachOObjectFile::exports(ArrayRef<uint8_t> Trie) {
+ ExportEntry Start(Trie);
+ if (Trie.size() == 0)
+ Start.moveToEnd();
+ else
+ Start.moveToFirst();
+
+ ExportEntry Finish(Trie);
+ Finish.moveToEnd();
+
+ return iterator_range<export_iterator>(export_iterator(Start),
+ export_iterator(Finish));
+}
+
+iterator_range<export_iterator> MachOObjectFile::exports() const {
+ return exports(getDyldInfoExportsTrie());
+}
+
+
+MachORebaseEntry::MachORebaseEntry(ArrayRef<uint8_t> Bytes, bool is64Bit)
+ : Opcodes(Bytes), Ptr(Bytes.begin()), SegmentOffset(0), SegmentIndex(0),
+ RemainingLoopCount(0), AdvanceAmount(0), RebaseType(0),
+ PointerSize(is64Bit ? 8 : 4), Malformed(false), Done(false) {}
+
+void MachORebaseEntry::moveToFirst() {
+ Ptr = Opcodes.begin();
+ moveNext();
+}
+
+void MachORebaseEntry::moveToEnd() {
+ Ptr = Opcodes.end();
+ RemainingLoopCount = 0;
+ Done = true;
+}
+
+void MachORebaseEntry::moveNext() {
+ // If in the middle of some loop, move to next rebasing in loop.
+ SegmentOffset += AdvanceAmount;
+ if (RemainingLoopCount) {
+ --RemainingLoopCount;
+ return;
+ }
+ if (Ptr == Opcodes.end()) {
+ Done = true;
+ return;
+ }
+ bool More = true;
+ while (More && !Malformed) {
+ // Parse next opcode and set up next loop.
+ uint8_t Byte = *Ptr++;
+ uint8_t ImmValue = Byte & MachO::REBASE_IMMEDIATE_MASK;
+ uint8_t Opcode = Byte & MachO::REBASE_OPCODE_MASK;
+ switch (Opcode) {
+ case MachO::REBASE_OPCODE_DONE:
+ More = false;
+ Done = true;
+ moveToEnd();
+ DEBUG_WITH_TYPE("mach-o-rebase", llvm::dbgs() << "REBASE_OPCODE_DONE\n");
+ break;
+ case MachO::REBASE_OPCODE_SET_TYPE_IMM:
+ RebaseType = ImmValue;
+ DEBUG_WITH_TYPE(
+ "mach-o-rebase",
+ llvm::dbgs() << "REBASE_OPCODE_SET_TYPE_IMM: "
+ << "RebaseType=" << (int) RebaseType << "\n");
+ break;
+ case MachO::REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB:
+ SegmentIndex = ImmValue;
+ SegmentOffset = readULEB128();
+ DEBUG_WITH_TYPE(
+ "mach-o-rebase",
+ llvm::dbgs() << "REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: "
+ << "SegmentIndex=" << SegmentIndex << ", "
+ << format("SegmentOffset=0x%06X", SegmentOffset)
+ << "\n");
+ break;
+ case MachO::REBASE_OPCODE_ADD_ADDR_ULEB:
+ SegmentOffset += readULEB128();
+ DEBUG_WITH_TYPE("mach-o-rebase",
+ llvm::dbgs() << "REBASE_OPCODE_ADD_ADDR_ULEB: "
+ << format("SegmentOffset=0x%06X",
+ SegmentOffset) << "\n");
+ break;
+ case MachO::REBASE_OPCODE_ADD_ADDR_IMM_SCALED:
+ SegmentOffset += ImmValue * PointerSize;
+ DEBUG_WITH_TYPE("mach-o-rebase",
+ llvm::dbgs() << "REBASE_OPCODE_ADD_ADDR_IMM_SCALED: "
+ << format("SegmentOffset=0x%06X",
+ SegmentOffset) << "\n");
+ break;
+ case MachO::REBASE_OPCODE_DO_REBASE_IMM_TIMES:
+ AdvanceAmount = PointerSize;
+ RemainingLoopCount = ImmValue - 1;
+ DEBUG_WITH_TYPE(
+ "mach-o-rebase",
+ llvm::dbgs() << "REBASE_OPCODE_DO_REBASE_IMM_TIMES: "
+ << format("SegmentOffset=0x%06X", SegmentOffset)
+ << ", AdvanceAmount=" << AdvanceAmount
+ << ", RemainingLoopCount=" << RemainingLoopCount
+ << "\n");
+ return;
+ case MachO::REBASE_OPCODE_DO_REBASE_ULEB_TIMES:
+ AdvanceAmount = PointerSize;
+ RemainingLoopCount = readULEB128() - 1;
+ DEBUG_WITH_TYPE(
+ "mach-o-rebase",
+ llvm::dbgs() << "REBASE_OPCODE_DO_REBASE_ULEB_TIMES: "
+ << format("SegmentOffset=0x%06X", SegmentOffset)
+ << ", AdvanceAmount=" << AdvanceAmount
+ << ", RemainingLoopCount=" << RemainingLoopCount
+ << "\n");
+ return;
+ case MachO::REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB:
+ AdvanceAmount = readULEB128() + PointerSize;
+ RemainingLoopCount = 0;
+ DEBUG_WITH_TYPE(
+ "mach-o-rebase",
+ llvm::dbgs() << "REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB: "
+ << format("SegmentOffset=0x%06X", SegmentOffset)
+ << ", AdvanceAmount=" << AdvanceAmount
+ << ", RemainingLoopCount=" << RemainingLoopCount
+ << "\n");
+ return;
+ case MachO::REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB:
+ RemainingLoopCount = readULEB128() - 1;
+ AdvanceAmount = readULEB128() + PointerSize;
+ DEBUG_WITH_TYPE(
+ "mach-o-rebase",
+ llvm::dbgs() << "REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB: "
+ << format("SegmentOffset=0x%06X", SegmentOffset)
+ << ", AdvanceAmount=" << AdvanceAmount
+ << ", RemainingLoopCount=" << RemainingLoopCount
+ << "\n");
+ return;
+ default:
+ Malformed = true;
+ }
+ }
+}
+
+uint64_t MachORebaseEntry::readULEB128() {
+ unsigned Count;
+ uint64_t Result = decodeULEB128(Ptr, &Count);
+ Ptr += Count;
+ if (Ptr > Opcodes.end()) {
+ Ptr = Opcodes.end();
+ Malformed = true;
+ }
+ return Result;
+}
+
+uint32_t MachORebaseEntry::segmentIndex() const { return SegmentIndex; }
+
+uint64_t MachORebaseEntry::segmentOffset() const { return SegmentOffset; }
+
+StringRef MachORebaseEntry::typeName() const {
+ switch (RebaseType) {
+ case MachO::REBASE_TYPE_POINTER:
+ return "pointer";
+ case MachO::REBASE_TYPE_TEXT_ABSOLUTE32:
+ return "text abs32";
+ case MachO::REBASE_TYPE_TEXT_PCREL32:
+ return "text rel32";
+ }
+ return "unknown";
+}
+
+bool MachORebaseEntry::operator==(const MachORebaseEntry &Other) const {
+ assert(Opcodes == Other.Opcodes && "compare iterators of different files");
+ return (Ptr == Other.Ptr) &&
+ (RemainingLoopCount == Other.RemainingLoopCount) &&
+ (Done == Other.Done);
+}
+
+iterator_range<rebase_iterator>
+MachOObjectFile::rebaseTable(ArrayRef<uint8_t> Opcodes, bool is64) {
+ MachORebaseEntry Start(Opcodes, is64);
+ Start.moveToFirst();
+
+ MachORebaseEntry Finish(Opcodes, is64);
+ Finish.moveToEnd();
+
+ return iterator_range<rebase_iterator>(rebase_iterator(Start),
+ rebase_iterator(Finish));
+}
+
+iterator_range<rebase_iterator> MachOObjectFile::rebaseTable() const {
+ return rebaseTable(getDyldInfoRebaseOpcodes(), is64Bit());
+}
+
+
+MachOBindEntry::MachOBindEntry(ArrayRef<uint8_t> Bytes, bool is64Bit,
+ Kind BK)
+ : Opcodes(Bytes), Ptr(Bytes.begin()), SegmentOffset(0), SegmentIndex(0),
+ Ordinal(0), Flags(0), Addend(0), RemainingLoopCount(0), AdvanceAmount(0),
+ BindType(0), PointerSize(is64Bit ? 8 : 4),
+ TableKind(BK), Malformed(false), Done(false) {}
+
+void MachOBindEntry::moveToFirst() {
+ Ptr = Opcodes.begin();
+ moveNext();
+}
+
+void MachOBindEntry::moveToEnd() {
+ Ptr = Opcodes.end();
+ RemainingLoopCount = 0;
+ Done = true;
+}
+
+void MachOBindEntry::moveNext() {
+ // If in the middle of some loop, move to next binding in loop.
+ SegmentOffset += AdvanceAmount;
+ if (RemainingLoopCount) {
+ --RemainingLoopCount;
+ return;
+ }
+ if (Ptr == Opcodes.end()) {
+ Done = true;
+ return;
+ }
+ bool More = true;
+ while (More && !Malformed) {
+ // Parse next opcode and set up next loop.
+ uint8_t Byte = *Ptr++;
+ uint8_t ImmValue = Byte & MachO::BIND_IMMEDIATE_MASK;
+ uint8_t Opcode = Byte & MachO::BIND_OPCODE_MASK;
+ int8_t SignExtended;
+ const uint8_t *SymStart;
+ switch (Opcode) {
+ case MachO::BIND_OPCODE_DONE:
+ if (TableKind == Kind::Lazy) {
+ // Lazying bindings have a DONE opcode between entries. Need to ignore
+ // it to advance to next entry. But need not if this is last entry.
+ bool NotLastEntry = false;
+ for (const uint8_t *P = Ptr; P < Opcodes.end(); ++P) {
+ if (*P) {
+ NotLastEntry = true;
+ }
+ }
+ if (NotLastEntry)
+ break;
+ }
+ More = false;
+ Done = true;
+ moveToEnd();
+ DEBUG_WITH_TYPE("mach-o-bind", llvm::dbgs() << "BIND_OPCODE_DONE\n");
+ break;
+ case MachO::BIND_OPCODE_SET_DYLIB_ORDINAL_IMM:
+ Ordinal = ImmValue;
+ DEBUG_WITH_TYPE(
+ "mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_SET_DYLIB_ORDINAL_IMM: "
+ << "Ordinal=" << Ordinal << "\n");
+ break;
+ case MachO::BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB:
+ Ordinal = readULEB128();
+ DEBUG_WITH_TYPE(
+ "mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB: "
+ << "Ordinal=" << Ordinal << "\n");
+ break;
+ case MachO::BIND_OPCODE_SET_DYLIB_SPECIAL_IMM:
+ if (ImmValue) {
+ SignExtended = MachO::BIND_OPCODE_MASK | ImmValue;
+ Ordinal = SignExtended;
+ } else
+ Ordinal = 0;
+ DEBUG_WITH_TYPE(
+ "mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_SET_DYLIB_SPECIAL_IMM: "
+ << "Ordinal=" << Ordinal << "\n");
+ break;
+ case MachO::BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM:
+ Flags = ImmValue;
+ SymStart = Ptr;
+ while (*Ptr) {
+ ++Ptr;
+ }
+ SymbolName = StringRef(reinterpret_cast<const char*>(SymStart),
+ Ptr-SymStart);
+ ++Ptr;
+ DEBUG_WITH_TYPE(
+ "mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM: "
+ << "SymbolName=" << SymbolName << "\n");
+ if (TableKind == Kind::Weak) {
+ if (ImmValue & MachO::BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION)
+ return;
+ }
+ break;
+ case MachO::BIND_OPCODE_SET_TYPE_IMM:
+ BindType = ImmValue;
+ DEBUG_WITH_TYPE(
+ "mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_SET_TYPE_IMM: "
+ << "BindType=" << (int)BindType << "\n");
+ break;
+ case MachO::BIND_OPCODE_SET_ADDEND_SLEB:
+ Addend = readSLEB128();
+ if (TableKind == Kind::Lazy)
+ Malformed = true;
+ DEBUG_WITH_TYPE(
+ "mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_SET_ADDEND_SLEB: "
+ << "Addend=" << Addend << "\n");
+ break;
+ case MachO::BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB:
+ SegmentIndex = ImmValue;
+ SegmentOffset = readULEB128();
+ DEBUG_WITH_TYPE(
+ "mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: "
+ << "SegmentIndex=" << SegmentIndex << ", "
+ << format("SegmentOffset=0x%06X", SegmentOffset)
+ << "\n");
+ break;
+ case MachO::BIND_OPCODE_ADD_ADDR_ULEB:
+ SegmentOffset += readULEB128();
+ DEBUG_WITH_TYPE("mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_ADD_ADDR_ULEB: "
+ << format("SegmentOffset=0x%06X",
+ SegmentOffset) << "\n");
+ break;
+ case MachO::BIND_OPCODE_DO_BIND:
+ AdvanceAmount = PointerSize;
+ RemainingLoopCount = 0;
+ DEBUG_WITH_TYPE("mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_DO_BIND: "
+ << format("SegmentOffset=0x%06X",
+ SegmentOffset) << "\n");
+ return;
+ case MachO::BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB:
+ AdvanceAmount = readULEB128() + PointerSize;
+ RemainingLoopCount = 0;
+ if (TableKind == Kind::Lazy)
+ Malformed = true;
+ DEBUG_WITH_TYPE(
+ "mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB: "
+ << format("SegmentOffset=0x%06X", SegmentOffset)
+ << ", AdvanceAmount=" << AdvanceAmount
+ << ", RemainingLoopCount=" << RemainingLoopCount
+ << "\n");
+ return;
+ case MachO::BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED:
+ AdvanceAmount = ImmValue * PointerSize + PointerSize;
+ RemainingLoopCount = 0;
+ if (TableKind == Kind::Lazy)
+ Malformed = true;
+ DEBUG_WITH_TYPE("mach-o-bind",
+ llvm::dbgs()
+ << "BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED: "
+ << format("SegmentOffset=0x%06X",
+ SegmentOffset) << "\n");
+ return;
+ case MachO::BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB:
+ RemainingLoopCount = readULEB128() - 1;
+ AdvanceAmount = readULEB128() + PointerSize;
+ if (TableKind == Kind::Lazy)
+ Malformed = true;
+ DEBUG_WITH_TYPE(
+ "mach-o-bind",
+ llvm::dbgs() << "BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB: "
+ << format("SegmentOffset=0x%06X", SegmentOffset)
+ << ", AdvanceAmount=" << AdvanceAmount
+ << ", RemainingLoopCount=" << RemainingLoopCount
+ << "\n");
+ return;
+ default:
+ Malformed = true;
+ }
+ }
+}
+
+uint64_t MachOBindEntry::readULEB128() {
+ unsigned Count;
+ uint64_t Result = decodeULEB128(Ptr, &Count);
+ Ptr += Count;
+ if (Ptr > Opcodes.end()) {
+ Ptr = Opcodes.end();
+ Malformed = true;
+ }
+ return Result;
+}
+
+int64_t MachOBindEntry::readSLEB128() {
+ unsigned Count;
+ int64_t Result = decodeSLEB128(Ptr, &Count);
+ Ptr += Count;
+ if (Ptr > Opcodes.end()) {
+ Ptr = Opcodes.end();
+ Malformed = true;
+ }
+ return Result;
+}
+
+
+uint32_t MachOBindEntry::segmentIndex() const { return SegmentIndex; }
+
+uint64_t MachOBindEntry::segmentOffset() const { return SegmentOffset; }
+
+StringRef MachOBindEntry::typeName() const {
+ switch (BindType) {
+ case MachO::BIND_TYPE_POINTER:
+ return "pointer";
+ case MachO::BIND_TYPE_TEXT_ABSOLUTE32:
+ return "text abs32";
+ case MachO::BIND_TYPE_TEXT_PCREL32:
+ return "text rel32";
+ }
+ return "unknown";
+}
+
+StringRef MachOBindEntry::symbolName() const { return SymbolName; }
+
+int64_t MachOBindEntry::addend() const { return Addend; }
+
+uint32_t MachOBindEntry::flags() const { return Flags; }
+
+int MachOBindEntry::ordinal() const { return Ordinal; }
+
+bool MachOBindEntry::operator==(const MachOBindEntry &Other) const {
+ assert(Opcodes == Other.Opcodes && "compare iterators of different files");
+ return (Ptr == Other.Ptr) &&
+ (RemainingLoopCount == Other.RemainingLoopCount) &&
+ (Done == Other.Done);
+}
+
+iterator_range<bind_iterator>
+MachOObjectFile::bindTable(ArrayRef<uint8_t> Opcodes, bool is64,
+ MachOBindEntry::Kind BKind) {
+ MachOBindEntry Start(Opcodes, is64, BKind);
+ Start.moveToFirst();
+
+ MachOBindEntry Finish(Opcodes, is64, BKind);
+ Finish.moveToEnd();
+
+ return iterator_range<bind_iterator>(bind_iterator(Start),
+ bind_iterator(Finish));
+}
+
+iterator_range<bind_iterator> MachOObjectFile::bindTable() const {
+ return bindTable(getDyldInfoBindOpcodes(), is64Bit(),
+ MachOBindEntry::Kind::Regular);
+}
+
+iterator_range<bind_iterator> MachOObjectFile::lazyBindTable() const {
+ return bindTable(getDyldInfoLazyBindOpcodes(), is64Bit(),
+ MachOBindEntry::Kind::Lazy);
+}
+
+iterator_range<bind_iterator> MachOObjectFile::weakBindTable() const {
+ return bindTable(getDyldInfoWeakBindOpcodes(), is64Bit(),
+ MachOBindEntry::Kind::Weak);
+}
+
StringRef
MachOObjectFile::getSectionFinalSegmentName(DataRefImpl Sec) const {
ArrayRef<char> Raw = getSectionRawFinalSegmentName(Sec);
ArrayRef<char>
MachOObjectFile::getSectionRawName(DataRefImpl Sec) const {
+ if (Sec.d.a >= Sections.size())
+ report_fatal_error("getSectionRawName: Invalid section index");
const section_base *Base =
reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
return makeArrayRef(Base->sectname);
ArrayRef<char>
MachOObjectFile::getSectionRawFinalSegmentName(DataRefImpl Sec) const {
+ if (Sec.d.a >= Sections.size())
+ report_fatal_error("getSectionRawFinalSegmentName: Invalid section index");
const section_base *Base =
reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
return makeArrayRef(Base->segname);
return RE.r_word1;
}
+uint32_t MachOObjectFile::getScatteredRelocationType(
+ const MachO::any_relocation_info &RE) const {
+ return (RE.r_word0 >> 24) & 0xf;
+}
+
unsigned MachOObjectFile::getAnyRelocationAddress(
const MachO::any_relocation_info &RE) const {
if (isRelocationScattered(RE))
sizeof(MachO::mach_header);
Load.Ptr = getPtr(this, HeaderSize);
Load.C = getStruct<MachO::load_command>(this, Load.Ptr);
+ if (Load.C.cmdsize < 8)
+ report_fatal_error("Load command with size < 8 bytes.");
return Load;
}
MachOObjectFile::LoadCommandInfo Next;
Next.Ptr = L.Ptr + L.C.cmdsize;
Next.C = getStruct<MachO::load_command>(this, Next.Ptr);
+ if (Next.C.cmdsize < 8)
+ report_fatal_error("Load command with size < 8 bytes.");
return Next;
}
MachO::section MachOObjectFile::getSection(DataRefImpl DRI) const {
+ // TODO: What if Sections.size() == 0?
+ if (DRI.d.a >= Sections.size())
+ report_fatal_error("getSection: Invalid section index.");
return getStruct<MachO::section>(this, Sections[DRI.d.a]);
}
MachO::section_64 MachOObjectFile::getSection64(DataRefImpl DRI) const {
+ // TODO: What if Sections.size() == 0?
+ if (DRI.d.a >= Sections.size())
+ report_fatal_error("getSection64: Invalid section index.");
return getStruct<MachO::section_64>(this, Sections[DRI.d.a]);
}
return getStruct<MachO::segment_command_64>(this, L.Ptr);
}
-MachO::linker_options_command
-MachOObjectFile::getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const {
- return getStruct<MachO::linker_options_command>(this, L.Ptr);
+MachO::linker_option_command
+MachOObjectFile::getLinkerOptionLoadCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::linker_option_command>(this, L.Ptr);
}
MachO::version_min_command
return getStruct<MachO::dylib_command>(this, L.Ptr);
}
+MachO::dyld_info_command
+MachOObjectFile::getDyldInfoLoadCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::dyld_info_command>(this, L.Ptr);
+}
+
+MachO::dylinker_command
+MachOObjectFile::getDylinkerCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::dylinker_command>(this, L.Ptr);
+}
+
+MachO::uuid_command
+MachOObjectFile::getUuidCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::uuid_command>(this, L.Ptr);
+}
+
+MachO::rpath_command
+MachOObjectFile::getRpathCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::rpath_command>(this, L.Ptr);
+}
+
+MachO::source_version_command
+MachOObjectFile::getSourceVersionCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::source_version_command>(this, L.Ptr);
+}
+
+MachO::entry_point_command
+MachOObjectFile::getEntryPointCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::entry_point_command>(this, L.Ptr);
+}
+
+MachO::encryption_info_command
+MachOObjectFile::getEncryptionInfoCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::encryption_info_command>(this, L.Ptr);
+}
+
+MachO::encryption_info_command_64
+MachOObjectFile::getEncryptionInfoCommand64(const LoadCommandInfo &L) const {
+ return getStruct<MachO::encryption_info_command_64>(this, L.Ptr);
+}
+
+MachO::sub_framework_command
+MachOObjectFile::getSubFrameworkCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::sub_framework_command>(this, L.Ptr);
+}
+
+MachO::sub_umbrella_command
+MachOObjectFile::getSubUmbrellaCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::sub_umbrella_command>(this, L.Ptr);
+}
+
+MachO::sub_library_command
+MachOObjectFile::getSubLibraryCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::sub_library_command>(this, L.Ptr);
+}
+
+MachO::sub_client_command
+MachOObjectFile::getSubClientCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::sub_client_command>(this, L.Ptr);
+}
+
+MachO::routines_command
+MachOObjectFile::getRoutinesCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::routines_command>(this, L.Ptr);
+}
+
+MachO::routines_command_64
+MachOObjectFile::getRoutinesCommand64(const LoadCommandInfo &L) const {
+ return getStruct<MachO::routines_command_64>(this, L.Ptr);
+}
+
+MachO::thread_command
+MachOObjectFile::getThreadCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::thread_command>(this, L.Ptr);
+}
MachO::any_relocation_info
MachOObjectFile::getRelocation(DataRefImpl Rel) const {
}
MachO::symtab_command MachOObjectFile::getSymtabLoadCommand() const {
- return getStruct<MachO::symtab_command>(this, SymtabLoadCmd);
+ if (SymtabLoadCmd)
+ return getStruct<MachO::symtab_command>(this, SymtabLoadCmd);
+
+ // If there is no SymtabLoadCmd return a load command with zero'ed fields.
+ MachO::symtab_command Cmd;
+ Cmd.cmd = MachO::LC_SYMTAB;
+ Cmd.cmdsize = sizeof(MachO::symtab_command);
+ Cmd.symoff = 0;
+ Cmd.nsyms = 0;
+ Cmd.stroff = 0;
+ Cmd.strsize = 0;
+ return Cmd;
}
MachO::dysymtab_command MachOObjectFile::getDysymtabLoadCommand() const {
- return getStruct<MachO::dysymtab_command>(this, DysymtabLoadCmd);
+ if (DysymtabLoadCmd)
+ return getStruct<MachO::dysymtab_command>(this, DysymtabLoadCmd);
+
+ // If there is no DysymtabLoadCmd return a load command with zero'ed fields.
+ MachO::dysymtab_command Cmd;
+ Cmd.cmd = MachO::LC_DYSYMTAB;
+ Cmd.cmdsize = sizeof(MachO::dysymtab_command);
+ Cmd.ilocalsym = 0;
+ Cmd.nlocalsym = 0;
+ Cmd.iextdefsym = 0;
+ Cmd.nextdefsym = 0;
+ Cmd.iundefsym = 0;
+ Cmd.nundefsym = 0;
+ Cmd.tocoff = 0;
+ Cmd.ntoc = 0;
+ Cmd.modtaboff = 0;
+ Cmd.nmodtab = 0;
+ Cmd.extrefsymoff = 0;
+ Cmd.nextrefsyms = 0;
+ Cmd.indirectsymoff = 0;
+ Cmd.nindirectsyms = 0;
+ Cmd.extreloff = 0;
+ Cmd.nextrel = 0;
+ Cmd.locreloff = 0;
+ Cmd.nlocrel = 0;
+ return Cmd;
}
MachO::linkedit_data_command
return Cmd;
}
+MachO::linkedit_data_command
+MachOObjectFile::getLinkOptHintsLoadCommand() const {
+ if (LinkOptHintsLoadCmd)
+ return getStruct<MachO::linkedit_data_command>(this, LinkOptHintsLoadCmd);
+
+ // If there is no LinkOptHintsLoadCmd return a load command with zero'ed
+ // fields.
+ MachO::linkedit_data_command Cmd;
+ Cmd.cmd = MachO::LC_LINKER_OPTIMIZATION_HINT;
+ Cmd.cmdsize = sizeof(MachO::linkedit_data_command);
+ Cmd.dataoff = 0;
+ Cmd.datasize = 0;
+ return Cmd;
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getDyldInfoRebaseOpcodes() const {
+ if (!DyldInfoLoadCmd)
+ return ArrayRef<uint8_t>();
+
+ MachO::dyld_info_command DyldInfo
+ = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
+ const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
+ getPtr(this, DyldInfo.rebase_off));
+ return ArrayRef<uint8_t>(Ptr, DyldInfo.rebase_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getDyldInfoBindOpcodes() const {
+ if (!DyldInfoLoadCmd)
+ return ArrayRef<uint8_t>();
+
+ MachO::dyld_info_command DyldInfo
+ = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
+ const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
+ getPtr(this, DyldInfo.bind_off));
+ return ArrayRef<uint8_t>(Ptr, DyldInfo.bind_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getDyldInfoWeakBindOpcodes() const {
+ if (!DyldInfoLoadCmd)
+ return ArrayRef<uint8_t>();
+
+ MachO::dyld_info_command DyldInfo
+ = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
+ const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
+ getPtr(this, DyldInfo.weak_bind_off));
+ return ArrayRef<uint8_t>(Ptr, DyldInfo.weak_bind_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getDyldInfoLazyBindOpcodes() const {
+ if (!DyldInfoLoadCmd)
+ return ArrayRef<uint8_t>();
+
+ MachO::dyld_info_command DyldInfo
+ = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
+ const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
+ getPtr(this, DyldInfo.lazy_bind_off));
+ return ArrayRef<uint8_t>(Ptr, DyldInfo.lazy_bind_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getDyldInfoExportsTrie() const {
+ if (!DyldInfoLoadCmd)
+ return ArrayRef<uint8_t>();
+
+ MachO::dyld_info_command DyldInfo
+ = getStruct<MachO::dyld_info_command>(this, DyldInfoLoadCmd);
+ const uint8_t *Ptr = reinterpret_cast<const uint8_t*>(
+ getPtr(this, DyldInfo.export_off));
+ return ArrayRef<uint8_t>(Ptr, DyldInfo.export_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getUuid() const {
+ if (!UuidLoadCmd)
+ return ArrayRef<uint8_t>();
+ // Returning a pointer is fine as uuid doesn't need endian swapping.
+ const char *Ptr = UuidLoadCmd + offsetof(MachO::uuid_command, uuid);
+ return ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(Ptr), 16);
+}
+
StringRef MachOObjectFile::getStringTableData() const {
MachO::symtab_command S = getSymtabLoadCommand();
return getData().substr(S.stroff, S.strsize);
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