};
}
+// 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
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);
-}
+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;
-static bool isPageZeroSegment(const MachOObjectFile *O,
- const MachOObjectFile::LoadCommandInfo &L) {
- if (O->is64Bit()) {
- MachO::segment_command_64 S = O->getSegment64LoadCommand(L);
- return StringRef("__PAGEZERO").equals(S.segname);
- }
- MachO::segment_command S = O->getSegmentLoadCommand(L);
- return StringRef("__PAGEZERO").equals(S.segname);
+ T Cmd;
+ memcpy(&Cmd, P, sizeof(T));
+ if (O->isLittleEndian() != sys::IsLittleEndianHost)
+ MachO::swapStruct(Cmd);
+ return Cmd;
}
-
static const char *
getSectionPtr(const MachOObjectFile *O, MachOObjectFile::LoadCommandInfo L,
unsigned Sec) {
return Sect.flags;
}
-static MachOObjectFile::LoadCommandInfo
+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 = getStruct<MachO::load_command>(Obj, Load.Ptr);
- if (Load.C.cmdsize < 8)
- report_fatal_error("Load command with size < 8 bytes.");
+ Load.C = CmdOrErr.get();
return Load;
}
-static MachOObjectFile::LoadCommandInfo
+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 MachOObjectFile::LoadCommandInfo
+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),
DataInCodeLoadCmd(nullptr), LinkOptHintsLoadCmd(nullptr),
DyldInfoLoadCmd(nullptr), UuidLoadCmd(nullptr),
HasPageZeroSegment(false) {
- // Parse header.
if (is64Bit())
- Header64 = getStruct<MachO::mach_header_64>(this, getPtr(this, 0));
+ parseHeader(this, Header64, EC);
else
- // First fields of MachO::mach_header_64 are the same as
- // in MachO::mach_header.
- *reinterpret_cast<MachO::mach_header *>(&this->Header64) =
- getStruct<MachO::mach_header>(this, getPtr(this, 0));
+ parseHeader(this, Header, EC);
+ if (EC)
+ return;
uint32_t LoadCommandCount = getHeader().ncmds;
if (LoadCommandCount == 0)
return;
- MachO::LoadCommandType SegmentLoadType = is64Bit() ?
- MachO::LC_SEGMENT_64 : MachO::LC_SEGMENT;
-
- LoadCommandInfo Load = getFirstLoadCommandInfo(this);
+ 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) {
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_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)
- Load = getNextLoadCommandInfo(this, Load);
+ if (I < LoadCommandCount - 1) {
+ auto LoadOrErr = getNextLoadCommandInfo(this, Load);
+ if (!LoadOrErr) {
+ EC = LoadOrErr.getError();
+ return;
+ }
+ Load = LoadOrErr.get();
+ }
}
assert(LoadCommands.size() == LoadCommandCount);
}
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];
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;
+ return StringRef(Start);
}
unsigned MachOObjectFile::getSectionType(SectionRef Sec) const {
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
// index is in the n_value field.
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);
+}
+
+ErrorOr<uint64_t> MachOObjectFile::getSymbolAddress(DataRefImpl Sym) const {
+ return getSymbolValue(Sym);
}
uint32_t MachOObjectFile::getSymbolAlignment(DataRefImpl DRI) const {
return 0;
}
-uint64_t MachOObjectFile::getSymbolSize(DataRefImpl DRI) const {
- uint64_t Value;
- getSymbolAddress(DRI, Value);
- uint32_t flags = getSymbolFlags(DRI);
- if (flags & SymbolRef::SF_Common)
- return Value;
- return UnknownAddressOrSize;
+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;
+ 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))
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;
- if (DRI.d.a >= Sections.size())
- report_fatal_error("getSymbolSection: Invalid section index.");
- 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();
}
uint64_t MachOObjectFile::getSectionAddress(DataRefImpl Sec) const {
}
Res = this->getData().substr(Offset, Size);
- return object_error::success;
+ return std::error_code();
}
uint64_t MachOObjectFile::getSectionAlignment(DataRefImpl Sec) const {
SectionType == MachO::S_GB_ZEROFILL);
}
+unsigned MachOObjectFile::getSectionID(SectionRef Sec) const {
+ return Sec.getRawDataRefImpl().d.a;
+}
+
bool MachOObjectFile::isSectionVirtual(DataRefImpl Sec) const {
// FIXME: Unimplemented.
return false;
}
-bool MachOObjectFile::sectionContainsSymbol(DataRefImpl Sec,
- DataRefImpl Symb) const {
- SymbolRef::Type ST;
- this->getSymbolType(Symb, ST);
- if (ST == SymbolRef::ST_Unknown)
- return false;
-
- uint64_t SectBegin = getSectionAddress(Sec);
- uint64_t SectEnd = getSectionSize(Sec);
- SectEnd += SectBegin;
-
- uint64_t SymAddr;
- getSymbolAddress(Symb, SymAddr);
- return (SymAddr >= SectBegin) && (SymAddr < SectEnd);
-}
-
relocation_iterator MachOObjectFile::section_rel_begin(DataRefImpl Sec) const {
DataRefImpl Ret;
Ret.d.a = Sec.d.a;
++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);
- 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 section_iterator(getAnyRelocationSection(getRelocation(Rel)));
}
-std::error_code MachOObjectFile::getRelocationType(DataRefImpl Rel,
- uint64_t &Res) const {
+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::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;
}
uint8_t MachOObjectFile::getRelocationLength(DataRefImpl Rel) const {
}
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 {
.Case("armv5e", true)
.Case("armv6", true)
.Case("armv6m", true)
+ .Case("armv7", true)
.Case("armv7em", true)
.Case("armv7k", true)
.Case("armv7m", true)
Triple MachOObjectFile::getArch(const char **McpuDefault,
Triple *ThumbTriple) const {
- const auto &Header = getHeader();
*ThumbTriple = getThumbArch(Header.cputype, Header.cpusubtype, McpuDefault);
return getArch(Header.cputype, Header.cpusubtype, McpuDefault);
}
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);
}
}
const MachO::mach_header &MachOObjectFile::getHeader() const {
- // First fields of MachO::mach_header_64 are the same as
- // in MachO::mach_header.
- return *reinterpret_cast<const MachO::mach_header *>(&this->Header64);
+ return Header;
}
const MachO::mach_header_64 &MachOObjectFile::getHeader64() const {
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