#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>
+// FIXME: Replace all uses of this function with getStructOrErr.
+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;
}
-static uint32_t
-getSegmentLoadCommandNumSections(const MachOObjectFile *O,
- const MachOObjectFile::LoadCommandInfo &L) {
- if (O->is64Bit()) {
- MachO::segment_command_64 S = O->getSegment64LoadCommand(L);
- return S.nsects;
- }
- MachO::segment_command S = O->getSegmentLoadCommand(L);
- return S.nsects;
+template <typename T>
+static ErrorOr<T> getStructOrErr(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())
+ return object_error::parse_failed;
+
+ T Cmd;
+ memcpy(&Cmd, P, sizeof(T));
+ if (O->isLittleEndian() != sys::IsLittleEndianHost)
+ MachO::swapStruct(Cmd);
+ return Cmd;
}
static const char *
return O->getHeader().cputype;
}
-static void printRelocationTargetName(const MachOObjectFile *O,
- const MachO::any_relocation_info &RE,
- raw_string_ostream &fmt) {
- bool IsScattered = O->isRelocationScattered(RE);
-
- // Target of a scattered relocation is an address. In the interest of
- // generating pretty output, scan through the symbol table looking for a
- // symbol that aligns with that address. If we find one, print it.
- // Otherwise, we just print the hex address of the target.
- if (IsScattered) {
- uint32_t Val = O->getPlainRelocationSymbolNum(RE);
-
- for (const SymbolRef &Symbol : O->symbols()) {
- std::error_code ec;
- uint64_t Addr;
- StringRef Name;
-
- if ((ec = Symbol.getAddress(Addr)))
- report_fatal_error(ec.message());
- if (Addr != Val)
- continue;
- if ((ec = Symbol.getName(Name)))
- report_fatal_error(ec.message());
- fmt << Name;
- return;
- }
-
- // If we couldn't find a symbol that this relocation refers to, try
- // 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());
- if (Addr != Val)
- continue;
- if ((ec = Section.getName(Name)))
- report_fatal_error(ec.message());
- fmt << Name;
- return;
- }
-
- fmt << format("0x%x", Val);
- return;
- }
-
- StringRef S;
- bool isExtern = O->getPlainRelocationExternal(RE);
- uint64_t Val = O->getPlainRelocationSymbolNum(RE);
-
- if (isExtern) {
- symbol_iterator SI = O->symbol_begin();
- advance(SI, Val);
- SI->getName(S);
- } else {
- section_iterator SI = O->section_begin();
- // Adjust for the fact that sections are 1-indexed.
- advance(SI, Val - 1);
- SI->getName(S);
- }
-
- fmt << S;
-}
-
static uint32_t
getPlainRelocationAddress(const MachO::any_relocation_info &RE) {
return RE.r_word0;
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()) {
return Sect.flags;
}
-MachOObjectFile::MachOObjectFile(std::unique_ptr<MemoryBuffer> Object,
- bool IsLittleEndian, bool Is64bits,
- std::error_code &EC)
- : ObjectFile(getMachOType(IsLittleEndian, Is64bits), std::move(Object)),
+static ErrorOr<MachOObjectFile::LoadCommandInfo>
+getLoadCommandInfo(const MachOObjectFile *Obj, const char *Ptr) {
+ auto CmdOrErr = getStructOrErr<MachO::load_command>(Obj, Ptr);
+ if (!CmdOrErr)
+ return CmdOrErr.getError();
+ if (CmdOrErr->cmdsize < 8)
+ return object_error::macho_small_load_command;
+ MachOObjectFile::LoadCommandInfo Load;
+ Load.Ptr = Ptr;
+ Load.C = CmdOrErr.get();
+ return Load;
+}
+
+static ErrorOr<MachOObjectFile::LoadCommandInfo>
+getFirstLoadCommandInfo(const MachOObjectFile *Obj) {
+ unsigned HeaderSize = Obj->is64Bit() ? sizeof(MachO::mach_header_64)
+ : sizeof(MachO::mach_header);
+ return getLoadCommandInfo(Obj, getPtr(Obj, HeaderSize));
+}
+
+static ErrorOr<MachOObjectFile::LoadCommandInfo>
+getNextLoadCommandInfo(const MachOObjectFile *Obj,
+ const MachOObjectFile::LoadCommandInfo &L) {
+ return getLoadCommandInfo(Obj, L.Ptr + L.C.cmdsize);
+}
+
+template <typename T>
+static void parseHeader(const MachOObjectFile *Obj, T &Header,
+ std::error_code &EC) {
+ auto HeaderOrErr = getStructOrErr<T>(Obj, getPtr(Obj, 0));
+ if (HeaderOrErr)
+ Header = HeaderOrErr.get();
+ else
+ EC = HeaderOrErr.getError();
+}
+
+// Parses LC_SEGMENT or LC_SEGMENT_64 load command, adds addresses of all
+// sections to \param Sections, and optionally sets
+// \param IsPageZeroSegment to true.
+template <typename SegmentCmd>
+static std::error_code parseSegmentLoadCommand(
+ const MachOObjectFile *Obj, const MachOObjectFile::LoadCommandInfo &Load,
+ SmallVectorImpl<const char *> &Sections, bool &IsPageZeroSegment) {
+ const unsigned SegmentLoadSize = sizeof(SegmentCmd);
+ if (Load.C.cmdsize < SegmentLoadSize)
+ return object_error::macho_load_segment_too_small;
+ auto SegOrErr = getStructOrErr<SegmentCmd>(Obj, Load.Ptr);
+ if (!SegOrErr)
+ return SegOrErr.getError();
+ SegmentCmd S = SegOrErr.get();
+ const unsigned SectionSize =
+ Obj->is64Bit() ? sizeof(MachO::section_64) : sizeof(MachO::section);
+ if (S.nsects > std::numeric_limits<uint32_t>::max() / SectionSize ||
+ S.nsects * SectionSize > Load.C.cmdsize - SegmentLoadSize)
+ return object_error::macho_load_segment_too_many_sections;
+ for (unsigned J = 0; J < S.nsects; ++J) {
+ const char *Sec = getSectionPtr(Obj, Load, J);
+ Sections.push_back(Sec);
+ }
+ IsPageZeroSegment |= StringRef("__PAGEZERO").equals(S.segname);
+ return std::error_code();
+}
+
+MachOObjectFile::MachOObjectFile(MemoryBufferRef Object, bool IsLittleEndian,
+ bool Is64bits, std::error_code &EC)
+ : ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object),
SymtabLoadCmd(nullptr), DysymtabLoadCmd(nullptr),
- DataInCodeLoadCmd(nullptr) {
- uint32_t LoadCommandCount = this->getHeader().ncmds;
- MachO::LoadCommandType SegmentLoadType = is64Bit() ?
- MachO::LC_SEGMENT_64 : MachO::LC_SEGMENT;
+ DataInCodeLoadCmd(nullptr), LinkOptHintsLoadCmd(nullptr),
+ DyldInfoLoadCmd(nullptr), UuidLoadCmd(nullptr),
+ HasPageZeroSegment(false) {
+ if (is64Bit())
+ parseHeader(this, Header64, EC);
+ else
+ parseHeader(this, Header, EC);
+ if (EC)
+ return;
+
+ uint32_t LoadCommandCount = getHeader().ncmds;
+ if (LoadCommandCount == 0)
+ return;
- MachOObjectFile::LoadCommandInfo Load = getFirstLoadCommandInfo();
- for (unsigned I = 0; ; ++I) {
+ auto LoadOrErr = getFirstLoadCommandInfo(this);
+ if (!LoadOrErr) {
+ EC = LoadOrErr.getError();
+ return;
+ }
+ LoadCommandInfo Load = LoadOrErr.get();
+ for (unsigned I = 0; I < LoadCommandCount; ++I) {
+ LoadCommands.push_back(Load);
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 == SegmentLoadType) {
- uint32_t NumSections = getSegmentLoadCommandNumSections(this, Load);
- for (unsigned J = 0; J < NumSections; ++J) {
- const char *Sec = getSectionPtr(this, Load, J);
- Sections.push_back(Sec);
+ } 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 == MachO::LC_SEGMENT_64) {
+ if ((EC = parseSegmentLoadCommand<MachO::segment_command_64>(
+ this, Load, Sections, HasPageZeroSegment)))
+ return;
+ } else if (Load.C.cmd == MachO::LC_SEGMENT) {
+ if ((EC = parseSegmentLoadCommand<MachO::segment_command>(
+ this, Load, Sections, HasPageZeroSegment)))
+ return;
} 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 ||
Load.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
Libraries.push_back(Load.Ptr);
}
-
- if (I == LoadCommandCount - 1)
- break;
- else
- Load = getNextLoadCommandInfo(Load);
+ if (I < LoadCommandCount - 1) {
+ auto LoadOrErr = getNextLoadCommandInfo(this, Load);
+ if (!LoadOrErr) {
+ EC = LoadOrErr.getError();
+ return;
+ }
+ Load = LoadOrErr.get();
+ }
}
+ assert(LoadCommands.size() == LoadCommandCount);
}
void MachOObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
Symb.p += SymbolTableEntrySize;
}
-std::error_code MachOObjectFile::getSymbolName(DataRefImpl Symb,
- StringRef &Res) const {
+ErrorOr<StringRef> MachOObjectFile::getSymbolName(DataRefImpl Symb) const {
StringRef StringTable = getStringTableData();
MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
const char *Start = &StringTable.data()[Entry.n_strx];
- Res = StringRef(Start);
- return object_error::success;
+ if (Start < getData().begin() || Start >= getData().end())
+ report_fatal_error(
+ "Symbol name entry points before beginning or past end of file.");
+ return StringRef(Start);
+}
+
+unsigned MachOObjectFile::getSectionType(SectionRef Sec) const {
+ DataRefImpl DRI = Sec.getRawDataRefImpl();
+ uint32_t Flags = getSectionFlags(this, DRI);
+ return Flags & MachO::SECTION_TYPE;
+}
+
+uint64_t MachOObjectFile::getNValue(DataRefImpl Sym) const {
+ if (is64Bit()) {
+ MachO::nlist_64 Entry = getSymbol64TableEntry(Sym);
+ return Entry.n_value;
+ }
+ MachO::nlist Entry = getSymbolTableEntry(Sym);
+ return Entry.n_value;
}
// getIndirectName() returns the name of the alias'ed symbol who's string table
std::error_code MachOObjectFile::getIndirectName(DataRefImpl Symb,
StringRef &Res) const {
StringRef StringTable = getStringTableData();
- uint64_t NValue;
- if (is64Bit()) {
- MachO::nlist_64 Entry = getSymbol64TableEntry(Symb);
- NValue = Entry.n_value;
- if ((Entry.n_type & MachO::N_TYPE) != MachO::N_INDR)
- return object_error::parse_failed;
- } else {
- MachO::nlist Entry = getSymbolTableEntry(Symb);
- NValue = Entry.n_value;
- if ((Entry.n_type & MachO::N_TYPE) != MachO::N_INDR)
- return object_error::parse_failed;
- }
+ MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
+ if ((Entry.n_type & MachO::N_TYPE) != MachO::N_INDR)
+ return object_error::parse_failed;
+ uint64_t NValue = getNValue(Symb);
if (NValue >= StringTable.size())
return object_error::parse_failed;
const char *Start = &StringTable.data()[NValue];
Res = StringRef(Start);
- return object_error::success;
+ return std::error_code();
}
-std::error_code MachOObjectFile::getSymbolAddress(DataRefImpl Symb,
- uint64_t &Res) const {
- if (is64Bit()) {
- MachO::nlist_64 Entry = getSymbol64TableEntry(Symb);
- if ((Entry.n_type & MachO::N_TYPE) == MachO::N_UNDF &&
- Entry.n_value == 0)
- Res = UnknownAddressOrSize;
- else
- Res = Entry.n_value;
- } else {
- MachO::nlist Entry = getSymbolTableEntry(Symb);
- if ((Entry.n_type & MachO::N_TYPE) == MachO::N_UNDF &&
- Entry.n_value == 0)
- Res = UnknownAddressOrSize;
- else
- Res = Entry.n_value;
- }
- return object_error::success;
+uint64_t MachOObjectFile::getSymbolValueImpl(DataRefImpl Sym) const {
+ return getNValue(Sym);
}
-std::error_code MachOObjectFile::getSymbolAlignment(DataRefImpl DRI,
- uint32_t &Result) const {
+ErrorOr<uint64_t> MachOObjectFile::getSymbolAddress(DataRefImpl Sym) const {
+ return getSymbolValue(Sym);
+}
+
+uint32_t MachOObjectFile::getSymbolAlignment(DataRefImpl DRI) const {
uint32_t flags = getSymbolFlags(DRI);
if (flags & SymbolRef::SF_Common) {
MachO::nlist_base Entry = getSymbolTableEntryBase(this, DRI);
- Result = 1 << MachO::GET_COMM_ALIGN(Entry.n_desc);
- } else {
- Result = 0;
+ return 1 << MachO::GET_COMM_ALIGN(Entry.n_desc);
}
- return object_error::success;
+ return 0;
}
-std::error_code MachOObjectFile::getSymbolSize(DataRefImpl DRI,
- uint64_t &Result) const {
- uint64_t BeginOffset;
- uint64_t EndOffset = 0;
- uint8_t SectionIndex;
-
- MachO::nlist_base Entry = getSymbolTableEntryBase(this, DRI);
- uint64_t Value;
- getSymbolAddress(DRI, Value);
- if (Value == UnknownAddressOrSize) {
- Result = UnknownAddressOrSize;
- return object_error::success;
- }
-
- BeginOffset = Value;
-
- SectionIndex = Entry.n_sect;
- if (!SectionIndex) {
- uint32_t flags = getSymbolFlags(DRI);
- if (flags & SymbolRef::SF_Common)
- Result = Value;
- else
- Result = UnknownAddressOrSize;
- return object_error::success;
- }
- // Unfortunately symbols are unsorted so we need to touch all
- // symbols from load command
- for (const SymbolRef &Symbol : symbols()) {
- DataRefImpl DRI = Symbol.getRawDataRefImpl();
- Entry = getSymbolTableEntryBase(this, DRI);
- getSymbolAddress(DRI, Value);
- if (Value == UnknownAddressOrSize)
- continue;
- if (Entry.n_sect == SectionIndex && Value > BeginOffset)
- if (!EndOffset || Value < EndOffset)
- EndOffset = Value;
- }
- if (!EndOffset) {
- uint64_t Size;
- DataRefImpl Sec;
- Sec.d.a = SectionIndex-1;
- getSectionSize(Sec, Size);
- getSectionAddress(Sec, EndOffset);
- EndOffset += Size;
- }
- Result = EndOffset - BeginOffset;
- return object_error::success;
+uint64_t MachOObjectFile::getCommonSymbolSizeImpl(DataRefImpl DRI) const {
+ return getNValue(DRI);
}
-std::error_code MachOObjectFile::getSymbolType(DataRefImpl Symb,
- SymbolRef::Type &Res) const {
+SymbolRef::Type MachOObjectFile::getSymbolType(DataRefImpl Symb) const {
MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
uint8_t n_type = Entry.n_type;
- Res = SymbolRef::ST_Other;
-
// If this is a STAB debugging symbol, we can do nothing more.
- if (n_type & MachO::N_STAB) {
- Res = SymbolRef::ST_Debug;
- return object_error::success;
- }
+ if (n_type & MachO::N_STAB)
+ return SymbolRef::ST_Debug;
switch (n_type & MachO::N_TYPE) {
case MachO::N_UNDF :
- Res = SymbolRef::ST_Unknown;
- break;
+ return SymbolRef::ST_Unknown;
case MachO::N_SECT :
- Res = SymbolRef::ST_Function;
- break;
+ section_iterator Sec = *getSymbolSection(Symb);
+ if (Sec->isData() || Sec->isBSS())
+ return SymbolRef::ST_Data;
+ return SymbolRef::ST_Function;
}
- return object_error::success;
+ return SymbolRef::ST_Other;
}
uint32_t MachOObjectFile::getSymbolFlags(DataRefImpl DRI) const {
uint32_t Result = SymbolRef::SF_None;
- if ((MachOType & MachO::N_TYPE) == MachO::N_UNDF)
- Result |= SymbolRef::SF_Undefined;
-
if ((MachOType & MachO::N_TYPE) == MachO::N_INDR)
Result |= SymbolRef::SF_Indirect;
if (MachOType & MachO::N_EXT) {
Result |= SymbolRef::SF_Global;
if ((MachOType & MachO::N_TYPE) == MachO::N_UNDF) {
- uint64_t Value;
- getSymbolAddress(DRI, Value);
- if (Value && Value != UnknownAddressOrSize)
+ if (getNValue(DRI))
Result |= SymbolRef::SF_Common;
+ else
+ Result |= SymbolRef::SF_Undefined;
}
+
+ if (!(MachOType & MachO::N_PEXT))
+ Result |= SymbolRef::SF_Exported;
}
if (MachOFlags & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
Result |= SymbolRef::SF_Weak;
+ if (MachOFlags & (MachO::N_ARM_THUMB_DEF))
+ Result |= SymbolRef::SF_Thumb;
+
if ((MachOType & MachO::N_TYPE) == MachO::N_ABS)
Result |= SymbolRef::SF_Absolute;
return Result;
}
-std::error_code MachOObjectFile::getSymbolSection(DataRefImpl Symb,
- section_iterator &Res) const {
+ErrorOr<section_iterator>
+MachOObjectFile::getSymbolSection(DataRefImpl Symb) const {
MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
uint8_t index = Entry.n_sect;
- if (index == 0) {
- Res = section_end();
- } else {
- DataRefImpl DRI;
- DRI.d.a = index - 1;
- Res = section_iterator(SectionRef(DRI, this));
- }
+ if (index == 0)
+ return section_end();
+ DataRefImpl DRI;
+ DRI.d.a = index - 1;
+ if (DRI.d.a >= Sections.size())
+ report_fatal_error("getSymbolSection: Invalid section index.");
+ return section_iterator(SectionRef(DRI, this));
+}
- return object_error::success;
+unsigned MachOObjectFile::getSymbolSectionID(SymbolRef Sym) const {
+ MachO::nlist_base Entry =
+ getSymbolTableEntryBase(this, Sym.getRawDataRefImpl());
+ return Entry.n_sect - 1;
}
void MachOObjectFile::moveSectionNext(DataRefImpl &Sec) const {
StringRef &Result) const {
ArrayRef<char> Raw = getSectionRawName(Sec);
Result = parseSegmentOrSectionName(Raw.data());
- return object_error::success;
+ return std::error_code();
}
-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 {
+uint64_t MachOObjectFile::getSectionSize(DataRefImpl Sec) const {
+ // In the case if a malformed Mach-O file where the section offset is past
+ // the end of the file or some part of the section size is past the end of
+ // the file return a size of zero or a size that covers the rest of the file
+ // but does not extend past the end of the file.
+ uint32_t SectOffset, SectType;
+ uint64_t SectSize;
+
if (is64Bit()) {
MachO::section_64 Sect = getSection64(Sec);
- Res = Sect.size;
+ SectOffset = Sect.offset;
+ SectSize = Sect.size;
+ SectType = Sect.flags & MachO::SECTION_TYPE;
} else {
MachO::section Sect = getSection(Sec);
- Res = Sect.size;
+ SectOffset = Sect.offset;
+ SectSize = Sect.size;
+ SectType = Sect.flags & MachO::SECTION_TYPE;
}
-
- return object_error::success;
+ if (SectType == MachO::S_ZEROFILL || SectType == MachO::S_GB_ZEROFILL)
+ return SectSize;
+ uint64_t FileSize = getData().size();
+ if (SectOffset > FileSize)
+ return 0;
+ if (FileSize - SectOffset < SectSize)
+ return FileSize - SectOffset;
+ return SectSize;
}
std::error_code MachOObjectFile::getSectionContents(DataRefImpl Sec,
}
Res = this->getData().substr(Offset, Size);
- return object_error::success;
+ return std::error_code();
}
-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 {
- // FIXME: Unimplemented.
- Result = true;
- return object_error::success;
+unsigned MachOObjectFile::getSectionID(SectionRef Sec) const {
+ return Sec.getRawDataRefImpl().d.a;
}
-std::error_code MachOObjectFile::isSectionVirtual(DataRefImpl Sec,
- bool &Result) const {
+bool MachOObjectFile::isSectionVirtual(DataRefImpl Sec) 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 {
- SymbolRef::Type ST;
- this->getSymbolType(Symb, ST);
- if (ST == SymbolRef::ST_Unknown) {
- Result = false;
- return object_error::success;
- }
-
- uint64_t SectBegin, SectEnd;
- getSectionAddress(Sec, SectBegin);
- getSectionSize(Sec, SectEnd);
- SectEnd += SectBegin;
-
- uint64_t SymAddr;
- getSymbolAddress(Symb, SymAddr);
- Result = (SymAddr >= SectBegin) && (SymAddr < SectEnd);
-
- return object_error::success;
+ return false;
}
relocation_iterator MachOObjectFile::section_rel_begin(DataRefImpl Sec) const {
++Rel.d.b;
}
-std::error_code MachOObjectFile::getRelocationAddress(DataRefImpl Rel,
- uint64_t &Res) const {
- uint64_t Offset;
- getRelocationOffset(Rel, Offset);
-
- DataRefImpl Sec;
- Sec.d.a = Rel.d.a;
- uint64_t SecAddress;
- getSectionAddress(Sec, SecAddress);
- Res = SecAddress + Offset;
- return object_error::success;
-}
-
-std::error_code MachOObjectFile::getRelocationOffset(DataRefImpl Rel,
- uint64_t &Res) const {
+uint64_t MachOObjectFile::getRelocationOffset(DataRefImpl Rel) const {
assert(getHeader().filetype == MachO::MH_OBJECT &&
"Only implemented for MH_OBJECT");
MachO::any_relocation_info RE = getRelocation(Rel);
- Res = getAnyRelocationAddress(RE);
- return object_error::success;
+ return getAnyRelocationAddress(RE);
}
symbol_iterator
return symbol_iterator(SymbolRef(Sym, this));
}
-std::error_code MachOObjectFile::getRelocationType(DataRefImpl Rel,
- uint64_t &Res) const {
+section_iterator
+MachOObjectFile::getRelocationSection(DataRefImpl Rel) const {
+ return section_iterator(getAnyRelocationSection(getRelocation(Rel)));
+}
+
+uint64_t MachOObjectFile::getRelocationType(DataRefImpl Rel) const {
MachO::any_relocation_info RE = getRelocation(Rel);
- Res = getAnyRelocationType(RE);
- return object_error::success;
+ return getAnyRelocationType(RE);
}
-std::error_code
-MachOObjectFile::getRelocationTypeName(DataRefImpl Rel,
- SmallVectorImpl<char> &Result) const {
+void MachOObjectFile::getRelocationTypeName(
+ DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
StringRef res;
- uint64_t RType;
- getRelocationType(Rel, RType);
+ uint64_t RType = getRelocationType(Rel);
unsigned Arch = this->getArch();
break;
}
Result.append(res.begin(), res.end());
- return object_error::success;
}
-std::error_code
-MachOObjectFile::getRelocationValueString(DataRefImpl Rel,
- SmallVectorImpl<char> &Result) const {
+uint8_t MachOObjectFile::getRelocationLength(DataRefImpl Rel) const {
MachO::any_relocation_info RE = getRelocation(Rel);
-
- unsigned Arch = this->getArch();
-
- std::string fmtbuf;
- raw_string_ostream fmt(fmtbuf);
- unsigned Type = this->getAnyRelocationType(RE);
- bool IsPCRel = this->getAnyRelocationPCRel(RE);
-
- // Determine any addends that should be displayed with the relocation.
- // These require decoding the relocation type, which is triple-specific.
-
- // X86_64 has entirely custom relocation types.
- if (Arch == Triple::x86_64) {
- bool isPCRel = getAnyRelocationPCRel(RE);
-
- switch (Type) {
- case MachO::X86_64_RELOC_GOT_LOAD:
- case MachO::X86_64_RELOC_GOT: {
- printRelocationTargetName(this, RE, fmt);
- fmt << "@GOT";
- if (isPCRel) fmt << "PCREL";
- break;
- }
- case MachO::X86_64_RELOC_SUBTRACTOR: {
- DataRefImpl RelNext = Rel;
- moveRelocationNext(RelNext);
- MachO::any_relocation_info RENext = getRelocation(RelNext);
-
- // X86_64_RELOC_SUBTRACTOR must be followed by a relocation of type
- // X86_64_RELOC_UNSIGNED.
- // NOTE: Scattered relocations don't exist on x86_64.
- unsigned RType = getAnyRelocationType(RENext);
- if (RType != MachO::X86_64_RELOC_UNSIGNED)
- report_fatal_error("Expected X86_64_RELOC_UNSIGNED after "
- "X86_64_RELOC_SUBTRACTOR.");
-
- // The X86_64_RELOC_UNSIGNED contains the minuend symbol;
- // X86_64_RELOC_SUBTRACTOR contains the subtrahend.
- printRelocationTargetName(this, RENext, fmt);
- fmt << "-";
- printRelocationTargetName(this, RE, fmt);
- break;
- }
- case MachO::X86_64_RELOC_TLV:
- printRelocationTargetName(this, RE, fmt);
- fmt << "@TLV";
- if (isPCRel) fmt << "P";
- break;
- case MachO::X86_64_RELOC_SIGNED_1:
- printRelocationTargetName(this, RE, fmt);
- fmt << "-1";
- break;
- case MachO::X86_64_RELOC_SIGNED_2:
- printRelocationTargetName(this, RE, fmt);
- fmt << "-2";
- break;
- case MachO::X86_64_RELOC_SIGNED_4:
- printRelocationTargetName(this, RE, fmt);
- fmt << "-4";
- break;
- default:
- printRelocationTargetName(this, RE, fmt);
- break;
- }
- // X86 and ARM share some relocation types in common.
- } else if (Arch == Triple::x86 || Arch == Triple::arm ||
- Arch == Triple::ppc) {
- // Generic relocation types...
- switch (Type) {
- case MachO::GENERIC_RELOC_PAIR: // prints no info
- return object_error::success;
- case MachO::GENERIC_RELOC_SECTDIFF: {
- DataRefImpl RelNext = Rel;
- moveRelocationNext(RelNext);
- MachO::any_relocation_info RENext = getRelocation(RelNext);
-
- // X86 sect diff's must be followed by a relocation of type
- // GENERIC_RELOC_PAIR.
- unsigned RType = getAnyRelocationType(RENext);
-
- if (RType != MachO::GENERIC_RELOC_PAIR)
- report_fatal_error("Expected GENERIC_RELOC_PAIR after "
- "GENERIC_RELOC_SECTDIFF.");
-
- printRelocationTargetName(this, RE, fmt);
- fmt << "-";
- printRelocationTargetName(this, RENext, fmt);
- break;
- }
- }
-
- if (Arch == Triple::x86 || Arch == Triple::ppc) {
- switch (Type) {
- case MachO::GENERIC_RELOC_LOCAL_SECTDIFF: {
- DataRefImpl RelNext = Rel;
- moveRelocationNext(RelNext);
- MachO::any_relocation_info RENext = getRelocation(RelNext);
-
- // X86 sect diff's must be followed by a relocation of type
- // GENERIC_RELOC_PAIR.
- unsigned RType = getAnyRelocationType(RENext);
- if (RType != MachO::GENERIC_RELOC_PAIR)
- report_fatal_error("Expected GENERIC_RELOC_PAIR after "
- "GENERIC_RELOC_LOCAL_SECTDIFF.");
-
- printRelocationTargetName(this, RE, fmt);
- fmt << "-";
- printRelocationTargetName(this, RENext, fmt);
- break;
- }
- case MachO::GENERIC_RELOC_TLV: {
- printRelocationTargetName(this, RE, fmt);
- fmt << "@TLV";
- if (IsPCRel) fmt << "P";
- break;
- }
- default:
- printRelocationTargetName(this, RE, fmt);
- }
- } else { // ARM-specific relocations
- switch (Type) {
- case MachO::ARM_RELOC_HALF:
- case MachO::ARM_RELOC_HALF_SECTDIFF: {
- // Half relocations steal a bit from the length field to encode
- // whether this is an upper16 or a lower16 relocation.
- bool isUpper = getAnyRelocationLength(RE) >> 1;
-
- if (isUpper)
- fmt << ":upper16:(";
- else
- fmt << ":lower16:(";
- printRelocationTargetName(this, RE, fmt);
-
- DataRefImpl RelNext = Rel;
- moveRelocationNext(RelNext);
- MachO::any_relocation_info RENext = getRelocation(RelNext);
-
- // ARM half relocs must be followed by a relocation of type
- // ARM_RELOC_PAIR.
- unsigned RType = getAnyRelocationType(RENext);
- if (RType != MachO::ARM_RELOC_PAIR)
- report_fatal_error("Expected ARM_RELOC_PAIR after "
- "ARM_RELOC_HALF");
-
- // NOTE: The half of the target virtual address is stashed in the
- // address field of the secondary relocation, but we can't reverse
- // engineer the constant offset from it without decoding the movw/movt
- // instruction to find the other half in its immediate field.
-
- // ARM_RELOC_HALF_SECTDIFF encodes the second section in the
- // symbol/section pointer of the follow-on relocation.
- if (Type == MachO::ARM_RELOC_HALF_SECTDIFF) {
- fmt << "-";
- printRelocationTargetName(this, RENext, fmt);
- }
-
- fmt << ")";
- break;
- }
- default: {
- printRelocationTargetName(this, RE, fmt);
- }
- }
- }
- } else
- printRelocationTargetName(this, RE, fmt);
-
- fmt.flush();
- Result.append(fmtbuf.begin(), fmtbuf.end());
- return object_error::success;
-}
-
-std::error_code MachOObjectFile::getRelocationHidden(DataRefImpl Rel,
- bool &Result) const {
- unsigned Arch = getArch();
- uint64_t Type;
- getRelocationType(Rel, Type);
-
- Result = false;
-
- // On arches that use the generic relocations, GENERIC_RELOC_PAIR
- // is always hidden.
- if (Arch == Triple::x86 || Arch == Triple::arm || Arch == Triple::ppc) {
- if (Type == MachO::GENERIC_RELOC_PAIR) Result = true;
- } else if (Arch == Triple::x86_64) {
- // On x86_64, X86_64_RELOC_UNSIGNED is hidden only when it follows
- // an X86_64_RELOC_SUBTRACTOR.
- if (Type == MachO::X86_64_RELOC_UNSIGNED && Rel.d.a > 0) {
- DataRefImpl RelPrev = Rel;
- RelPrev.d.a--;
- uint64_t PrevType;
- getRelocationType(RelPrev, PrevType);
- if (PrevType == MachO::X86_64_RELOC_SUBTRACTOR)
- Result = true;
- }
- }
-
- return object_error::success;
-}
-
-std::error_code MachOObjectFile::getLibraryNext(DataRefImpl LibData,
- LibraryRef &Res) const {
- report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
-}
-
-std::error_code MachOObjectFile::getLibraryPath(DataRefImpl LibData,
- StringRef &Res) const {
- report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
+ return getAnyRelocationLength(RE);
}
//
// 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);
}
Res = LibrariesShortNames[Index];
- return object_error::success;
+ return std::error_code();
+}
+
+section_iterator
+MachOObjectFile::getRelocationRelocatedSection(relocation_iterator Rel) const {
+ DataRefImpl Sec;
+ Sec.d.a = Rel->getRawDataRefImpl().d.a;
+ return section_iterator(SectionRef(Sec, this));
}
basic_symbol_iterator MachOObjectFile::symbol_begin_impl() const {
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));
return section_iterator(SectionRef(DRI, this));
}
-library_iterator MachOObjectFile::needed_library_begin() const {
- // TODO: implement
- report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
-}
-
-library_iterator MachOObjectFile::needed_library_end() const {
- // TODO: implement
- report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
-}
-
uint8_t MachOObjectFile::getBytesInAddress() const {
return is64Bit() ? 8 : 4;
}
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";
}
}
-Triple MachOObjectFile::getArch(uint32_t CPUType, uint32_t CPUSubType) {
+Triple MachOObjectFile::getArch(uint32_t CPUType, uint32_t CPUSubType,
+ const char **McpuDefault) {
+ if (McpuDefault)
+ *McpuDefault = nullptr;
+
switch (CPUType) {
case MachO::CPU_TYPE_I386:
switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
case MachO::CPU_SUBTYPE_ARM_V6:
return Triple("armv6-apple-darwin");
case MachO::CPU_SUBTYPE_ARM_V6M:
+ if (McpuDefault)
+ *McpuDefault = "cortex-m0";
return Triple("armv6m-apple-darwin");
case MachO::CPU_SUBTYPE_ARM_V7:
return Triple("armv7-apple-darwin");
case MachO::CPU_SUBTYPE_ARM_V7EM:
+ if (McpuDefault)
+ *McpuDefault = "cortex-m4";
return Triple("armv7em-apple-darwin");
case MachO::CPU_SUBTYPE_ARM_V7K:
return Triple("armv7k-apple-darwin");
case MachO::CPU_SUBTYPE_ARM_V7M:
+ if (McpuDefault)
+ *McpuDefault = "cortex-m3";
return Triple("armv7m-apple-darwin");
case MachO::CPU_SUBTYPE_ARM_V7S:
return Triple("armv7s-apple-darwin");
}
}
+Triple MachOObjectFile::getThumbArch(uint32_t CPUType, uint32_t CPUSubType,
+ const char **McpuDefault) {
+ if (McpuDefault)
+ *McpuDefault = nullptr;
+
+ switch (CPUType) {
+ case MachO::CPU_TYPE_ARM:
+ switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
+ case MachO::CPU_SUBTYPE_ARM_V4T:
+ return Triple("thumbv4t-apple-darwin");
+ case MachO::CPU_SUBTYPE_ARM_V5TEJ:
+ return Triple("thumbv5e-apple-darwin");
+ case MachO::CPU_SUBTYPE_ARM_XSCALE:
+ return Triple("xscale-apple-darwin");
+ case MachO::CPU_SUBTYPE_ARM_V6:
+ return Triple("thumbv6-apple-darwin");
+ case MachO::CPU_SUBTYPE_ARM_V6M:
+ if (McpuDefault)
+ *McpuDefault = "cortex-m0";
+ return Triple("thumbv6m-apple-darwin");
+ case MachO::CPU_SUBTYPE_ARM_V7:
+ return Triple("thumbv7-apple-darwin");
+ case MachO::CPU_SUBTYPE_ARM_V7EM:
+ if (McpuDefault)
+ *McpuDefault = "cortex-m4";
+ return Triple("thumbv7em-apple-darwin");
+ case MachO::CPU_SUBTYPE_ARM_V7K:
+ return Triple("thumbv7k-apple-darwin");
+ case MachO::CPU_SUBTYPE_ARM_V7M:
+ if (McpuDefault)
+ *McpuDefault = "cortex-m3";
+ return Triple("thumbv7m-apple-darwin");
+ case MachO::CPU_SUBTYPE_ARM_V7S:
+ return Triple("thumbv7s-apple-darwin");
+ default:
+ return Triple();
+ }
+ default:
+ return Triple();
+ }
+}
+
+Triple MachOObjectFile::getArch(uint32_t CPUType, uint32_t CPUSubType,
+ const char **McpuDefault, Triple *ThumbTriple) {
+ Triple T = MachOObjectFile::getArch(CPUType, CPUSubType, McpuDefault);
+ *ThumbTriple = MachOObjectFile::getThumbArch(CPUType, CPUSubType,
+ McpuDefault);
+ return T;
+}
+
Triple MachOObjectFile::getHostArch() {
return Triple(sys::getDefaultTargetTriple());
}
.Case("armv5e", true)
.Case("armv6", true)
.Case("armv6m", true)
+ .Case("armv7", true)
.Case("armv7em", true)
.Case("armv7k", true)
.Case("armv7m", true)
return getArch(getCPUType(this));
}
-StringRef MachOObjectFile::getLoadName() const {
- // TODO: Implement
- report_fatal_error("get_load_name() unimplemented in MachOObjectFile");
+Triple MachOObjectFile::getArch(const char **McpuDefault,
+ Triple *ThumbTriple) const {
+ *ThumbTriple = getThumbArch(Header.cputype, Header.cpusubtype, McpuDefault);
+ return getArch(Header.cputype, Header.cpusubtype, McpuDefault);
}
relocation_iterator MachOObjectFile::section_rel_begin(unsigned Index) const {
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.equals(Other.CumulativeString))
+ 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;
+}
+
+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 make_range(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 make_range(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 make_range(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);
+}
+
+MachOObjectFile::load_command_iterator
+MachOObjectFile::begin_load_commands() const {
+ return LoadCommands.begin();
+}
+
+MachOObjectFile::load_command_iterator
+MachOObjectFile::end_load_commands() const {
+ return LoadCommands.end();
+}
+
+iterator_range<MachOObjectFile::load_command_iterator>
+MachOObjectFile::load_commands() const {
+ return make_range(begin_load_commands(), end_load_commands());
+}
+
StringRef
MachOObjectFile::getSectionFinalSegmentName(DataRefImpl Sec) const {
ArrayRef<char> Raw = getSectionRawFinalSegmentName(Sec);
ArrayRef<char>
MachOObjectFile::getSectionRawName(DataRefImpl Sec) const {
+ assert(Sec.d.a < Sections.size() && "Should have detected this earlier");
const section_base *Base =
reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
- return ArrayRef<char>(Base->sectname);
+ return makeArrayRef(Base->sectname);
}
ArrayRef<char>
MachOObjectFile::getSectionRawFinalSegmentName(DataRefImpl Sec) const {
+ assert(Sec.d.a < Sections.size() && "Should have detected this earlier");
const section_base *Base =
reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
- return ArrayRef<char>(Base->segname);
+ return makeArrayRef(Base->segname);
}
bool
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))
}
SectionRef
-MachOObjectFile::getRelocationSection(
+MachOObjectFile::getAnyRelocationSection(
const MachO::any_relocation_info &RE) const {
if (isRelocationScattered(RE) || getPlainRelocationExternal(RE))
return *section_end();
- unsigned SecNum = getPlainRelocationSymbolNum(RE) - 1;
+ unsigned SecNum = getPlainRelocationSymbolNum(RE);
+ if (SecNum == MachO::R_ABS || SecNum > Sections.size())
+ return *section_end();
DataRefImpl DRI;
- DRI.d.a = SecNum;
+ DRI.d.a = SecNum - 1;
return SectionRef(DRI, this);
}
-MachOObjectFile::LoadCommandInfo
-MachOObjectFile::getFirstLoadCommandInfo() const {
- MachOObjectFile::LoadCommandInfo Load;
-
- unsigned HeaderSize = is64Bit() ? sizeof(MachO::mach_header_64) :
- sizeof(MachO::mach_header);
- Load.Ptr = getPtr(this, HeaderSize);
- Load.C = getStruct<MachO::load_command>(this, Load.Ptr);
- return Load;
-}
-
-MachOObjectFile::LoadCommandInfo
-MachOObjectFile::getNextLoadCommandInfo(const LoadCommandInfo &L) const {
- MachOObjectFile::LoadCommandInfo Next;
- Next.Ptr = L.Ptr + L.C.cmdsize;
- Next.C = getStruct<MachO::load_command>(this, Next.Ptr);
- return Next;
-}
-
MachO::section MachOObjectFile::getSection(DataRefImpl DRI) const {
+ assert(DRI.d.a < Sections.size() && "Should have detected this earlier");
return getStruct<MachO::section>(this, Sections[DRI.d.a]);
}
MachO::section_64 MachOObjectFile::getSection64(DataRefImpl DRI) const {
+ assert(DRI.d.a < Sections.size() && "Should have detected this earlier");
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 {
return getStruct<MachO::data_in_code_entry>(this, P);
}
-MachO::mach_header MachOObjectFile::getHeader() const {
- return getStruct<MachO::mach_header>(this, getPtr(this, 0));
+const MachO::mach_header &MachOObjectFile::getHeader() const {
+ return Header;
}
-MachO::mach_header_64 MachOObjectFile::getHeader64() const {
- return getStruct<MachO::mach_header_64>(this, getPtr(this, 0));
+const MachO::mach_header_64 &MachOObjectFile::getHeader64() const {
+ assert(is64Bit());
+ return Header64;
}
uint32_t MachOObjectFile::getIndirectSymbolTableEntry(
}
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 None;
+
+ 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 makeArrayRef(Ptr, DyldInfo.rebase_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getDyldInfoBindOpcodes() const {
+ if (!DyldInfoLoadCmd)
+ return None;
+
+ 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 makeArrayRef(Ptr, DyldInfo.bind_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getDyldInfoWeakBindOpcodes() const {
+ if (!DyldInfoLoadCmd)
+ return None;
+
+ 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 makeArrayRef(Ptr, DyldInfo.weak_bind_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getDyldInfoLazyBindOpcodes() const {
+ if (!DyldInfoLoadCmd)
+ return None;
+
+ 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 makeArrayRef(Ptr, DyldInfo.lazy_bind_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getDyldInfoExportsTrie() const {
+ if (!DyldInfoLoadCmd)
+ return None;
+
+ 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 makeArrayRef(Ptr, DyldInfo.export_size);
+}
+
+ArrayRef<uint8_t> MachOObjectFile::getUuid() const {
+ if (!UuidLoadCmd)
+ return None;
+ // Returning a pointer is fine as uuid doesn't need endian swapping.
+ const char *Ptr = UuidLoadCmd + offsetof(MachO::uuid_command, uuid);
+ return makeArrayRef(reinterpret_cast<const uint8_t *>(Ptr), 16);
+}
+
StringRef MachOObjectFile::getStringTableData() const {
MachO::symtab_command S = getSymtabLoadCommand();
return getData().substr(S.stroff, S.strsize);
}
}
+bool MachOObjectFile::isRelocatableObject() const {
+ return getHeader().filetype == MachO::MH_OBJECT;
+}
+
ErrorOr<std::unique_ptr<MachOObjectFile>>
-ObjectFile::createMachOObjectFile(std::unique_ptr<MemoryBuffer> &Buffer) {
- StringRef Magic = Buffer->getBuffer().slice(0, 4);
+ObjectFile::createMachOObjectFile(MemoryBufferRef Buffer) {
+ StringRef Magic = Buffer.getBuffer().slice(0, 4);
std::error_code EC;
std::unique_ptr<MachOObjectFile> Ret;
if (Magic == "\xFE\xED\xFA\xCE")
- Ret.reset(new MachOObjectFile(std::move(Buffer), false, false, EC));
+ Ret.reset(new MachOObjectFile(Buffer, false, false, EC));
else if (Magic == "\xCE\xFA\xED\xFE")
- Ret.reset(new MachOObjectFile(std::move(Buffer), true, false, EC));
+ Ret.reset(new MachOObjectFile(Buffer, true, false, EC));
else if (Magic == "\xFE\xED\xFA\xCF")
- Ret.reset(new MachOObjectFile(std::move(Buffer), false, true, EC));
+ Ret.reset(new MachOObjectFile(Buffer, false, true, EC));
else if (Magic == "\xCF\xFA\xED\xFE")
- Ret.reset(new MachOObjectFile(std::move(Buffer), true, true, EC));
+ Ret.reset(new MachOObjectFile(Buffer, true, true, EC));
else
return object_error::parse_failed;
return EC;
return std::move(Ret);
}
-
projects / oota-llvm.git / blobdiff