//
//===----------------------------------------------------------------------===//
+#include "llvm/Object/MachO.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Object/MachOFormat.h"
-#include "llvm/Object/MachOObject.h"
-#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Format.h"
#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/MachO.h"
-
#include <cctype>
#include <cstring>
#include <limits>
using namespace object;
namespace llvm {
+namespace object {
-typedef MachOObject::LoadCommandInfo LoadCommandInfo;
-
-class MachOObjectFile : public ObjectFile {
-public:
- MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO, error_code &ec)
- : ObjectFile(Binary::isMachO, Object, ec),
+MachOObjectFile::MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO,
+ error_code &ec)
+ : ObjectFile(Binary::ID_MachO, Object, ec),
MachOObj(MOO),
- RegisteredStringTable(std::numeric_limits<uint32_t>::max()) {}
-
- virtual symbol_iterator begin_symbols() const;
- virtual symbol_iterator end_symbols() const;
- virtual section_iterator begin_sections() const;
- virtual section_iterator end_sections() const;
-
- virtual uint8_t getBytesInAddress() const;
- virtual StringRef getFileFormatName() const;
- virtual unsigned getArch() const;
-
-protected:
- virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
- virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
- virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
- virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
- virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
- virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const;
-
- virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
- virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
- virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
- virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
- virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
- virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
-
-private:
- MachOObject *MachOObj;
- mutable uint32_t RegisteredStringTable;
-
- void moveToNextSection(DataRefImpl &DRI) const;
- void getSymbolTableEntry(DataRefImpl DRI,
- InMemoryStruct<macho::SymbolTableEntry> &Res) const;
- void moveToNextSymbol(DataRefImpl &DRI) const;
- void getSection(DataRefImpl DRI, InMemoryStruct<macho::Section> &Res) const;
- void getSection64(DataRefImpl DRI,
- InMemoryStruct<macho::Section64> &Res) const;
-};
+ RegisteredStringTable(std::numeric_limits<uint32_t>::max()) {
+ DataRefImpl DRI;
+ moveToNextSection(DRI);
+ uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
+ while (DRI.d.a < LoadCommandCount) {
+ Sections.push_back(DRI);
+ DRI.d.b++;
+ moveToNextSection(DRI);
+ }
+}
+
ObjectFile *ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer) {
error_code ec;
MachOObject *MachOObj = MachOObject::LoadFromBuffer(Buffer, &Err);
if (!MachOObj)
return NULL;
- return new MachOObjectFile(Buffer, MachOObj, ec);
+ // MachOObject takes ownership of the Buffer we passed to it, and
+ // MachOObjectFile does, too, so we need to make sure they don't get the
+ // same object. A MemoryBuffer is cheap (it's just a reference to memory,
+ // not a copy of the memory itself), so just make a new copy here for
+ // the MachOObjectFile.
+ MemoryBuffer *NewBuffer =
+ MemoryBuffer::getMemBuffer(Buffer->getBuffer(),
+ Buffer->getBufferIdentifier(), false);
+ return new MachOObjectFile(NewBuffer, MachOObj, ec);
}
/*===-- Symbols -----------------------------------------------------------===*/
Res);
}
+void MachOObjectFile::getSymbol64TableEntry(DataRefImpl DRI,
+ InMemoryStruct<macho::Symbol64TableEntry> &Res) const {
+ InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
+ LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
+ MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
+
+ if (RegisteredStringTable != DRI.d.a) {
+ MachOObj->RegisterStringTable(*SymtabLoadCmd);
+ RegisteredStringTable = DRI.d.a;
+ }
+
+ MachOObj->ReadSymbol64TableEntry(SymtabLoadCmd->SymbolTableOffset, DRI.d.b,
+ Res);
+}
+
error_code MachOObjectFile::getSymbolNext(DataRefImpl DRI,
SymbolRef &Result) const {
error_code MachOObjectFile::getSymbolName(DataRefImpl DRI,
StringRef &Result) const {
- InMemoryStruct<macho::SymbolTableEntry> Entry;
- getSymbolTableEntry(DRI, Entry);
- Result = MachOObj->getStringAtIndex(Entry->StringIndex);
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(DRI, Entry);
+ Result = MachOObj->getStringAtIndex(Entry->StringIndex);
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(DRI, Entry);
+ Result = MachOObj->getStringAtIndex(Entry->StringIndex);
+ }
+ return object_error::success;
+}
+
+error_code MachOObjectFile::getSymbolFileOffset(DataRefImpl DRI,
+ uint64_t &Result) const {
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(DRI, Entry);
+ Result = Entry->Value;
+ if (Entry->SectionIndex) {
+ InMemoryStruct<macho::Section64> Section;
+ getSection64(Sections[Entry->SectionIndex-1], Section);
+ Result += Section->Offset - Section->Address;
+ }
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(DRI, Entry);
+ Result = Entry->Value;
+ if (Entry->SectionIndex) {
+ InMemoryStruct<macho::Section> Section;
+ getSection(Sections[Entry->SectionIndex-1], Section);
+ Result += Section->Offset - Section->Address;
+ }
+ }
+
return object_error::success;
}
error_code MachOObjectFile::getSymbolAddress(DataRefImpl DRI,
uint64_t &Result) const {
- InMemoryStruct<macho::SymbolTableEntry> Entry;
- getSymbolTableEntry(DRI, Entry);
- Result = Entry->Value;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(DRI, Entry);
+ Result = Entry->Value;
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(DRI, Entry);
+ Result = Entry->Value;
+ }
return object_error::success;
}
error_code MachOObjectFile::getSymbolSize(DataRefImpl DRI,
uint64_t &Result) const {
- Result = UnknownAddressOrSize;
+ uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
+ uint64_t BeginOffset;
+ uint64_t EndOffset = 0;
+ uint8_t SectionIndex;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(DRI, Entry);
+ BeginOffset = Entry->Value;
+ SectionIndex = Entry->SectionIndex;
+ if (!SectionIndex) {
+ uint32_t flags = SymbolRef::SF_None;
+ getSymbolFlags(DRI, flags);
+ if (flags & SymbolRef::SF_Common)
+ Result = Entry->Value;
+ else
+ Result = UnknownAddressOrSize;
+ return object_error::success;
+ }
+ // Unfortunately symbols are unsorted so we need to touch all
+ // symbols from load command
+ DRI.d.b = 0;
+ uint32_t Command = DRI.d.a;
+ while (Command == DRI.d.a) {
+ moveToNextSymbol(DRI);
+ if (DRI.d.a < LoadCommandCount) {
+ getSymbol64TableEntry(DRI, Entry);
+ if (Entry->SectionIndex == SectionIndex && Entry->Value > BeginOffset)
+ if (!EndOffset || Entry->Value < EndOffset)
+ EndOffset = Entry->Value;
+ }
+ DRI.d.b++;
+ }
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(DRI, Entry);
+ BeginOffset = Entry->Value;
+ SectionIndex = Entry->SectionIndex;
+ if (!SectionIndex) {
+ uint32_t flags = SymbolRef::SF_None;
+ getSymbolFlags(DRI, flags);
+ if (flags & SymbolRef::SF_Common)
+ Result = Entry->Value;
+ else
+ Result = UnknownAddressOrSize;
+ return object_error::success;
+ }
+ // Unfortunately symbols are unsorted so we need to touch all
+ // symbols from load command
+ DRI.d.b = 0;
+ uint32_t Command = DRI.d.a;
+ while (Command == DRI.d.a) {
+ moveToNextSymbol(DRI);
+ if (DRI.d.a < LoadCommandCount) {
+ getSymbolTableEntry(DRI, Entry);
+ if (Entry->SectionIndex == SectionIndex && Entry->Value > BeginOffset)
+ if (!EndOffset || Entry->Value < EndOffset)
+ EndOffset = Entry->Value;
+ }
+ DRI.d.b++;
+ }
+ }
+ if (!EndOffset) {
+ uint64_t Size;
+ getSectionSize(Sections[SectionIndex-1], Size);
+ getSectionAddress(Sections[SectionIndex-1], EndOffset);
+ EndOffset += Size;
+ }
+ Result = EndOffset - BeginOffset;
return object_error::success;
}
error_code MachOObjectFile::getSymbolNMTypeChar(DataRefImpl DRI,
char &Result) const {
- InMemoryStruct<macho::SymbolTableEntry> Entry;
- getSymbolTableEntry(DRI, Entry);
+ uint8_t Type, Flags;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(DRI, Entry);
+ Type = Entry->Type;
+ Flags = Entry->Flags;
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(DRI, Entry);
+ Type = Entry->Type;
+ Flags = Entry->Flags;
+ }
char Char;
- switch (Entry->Type & macho::STF_TypeMask) {
+ switch (Type & macho::STF_TypeMask) {
case macho::STT_Undefined:
Char = 'u';
break;
break;
}
- if (Entry->Flags & (macho::STF_External | macho::STF_PrivateExtern))
+ if (Flags & (macho::STF_External | macho::STF_PrivateExtern))
Char = toupper(Char);
Result = Char;
return object_error::success;
}
-error_code MachOObjectFile::isSymbolInternal(DataRefImpl DRI,
- bool &Result) const {
- InMemoryStruct<macho::SymbolTableEntry> Entry;
- getSymbolTableEntry(DRI, Entry);
- Result = Entry->Flags & macho::STF_StabsEntryMask;
+error_code MachOObjectFile::getSymbolFlags(DataRefImpl DRI,
+ uint32_t &Result) const {
+ uint16_t MachOFlags;
+ uint8_t MachOType;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(DRI, Entry);
+ MachOFlags = Entry->Flags;
+ MachOType = Entry->Type;
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(DRI, Entry);
+ MachOFlags = Entry->Flags;
+ MachOType = Entry->Type;
+ }
+
+ // TODO: Correctly set SF_ThreadLocal
+ Result = SymbolRef::SF_None;
+
+ if ((MachOType & MachO::NlistMaskType) == MachO::NListTypeUndefined)
+ Result |= SymbolRef::SF_Undefined;
+
+ if (MachOFlags & macho::STF_StabsEntryMask)
+ Result |= SymbolRef::SF_FormatSpecific;
+
+ if (MachOType & MachO::NlistMaskExternal) {
+ Result |= SymbolRef::SF_Global;
+ if ((MachOType & MachO::NlistMaskType) == MachO::NListTypeUndefined)
+ Result |= SymbolRef::SF_Common;
+ }
+
+ if (MachOFlags & (MachO::NListDescWeakRef | MachO::NListDescWeakDef))
+ Result |= SymbolRef::SF_Weak;
+
+ if ((MachOType & MachO::NlistMaskType) == MachO::NListTypeAbsolute)
+ Result |= SymbolRef::SF_Absolute;
+
+ return object_error::success;
+}
+
+error_code MachOObjectFile::getSymbolSection(DataRefImpl Symb,
+ section_iterator &Res) const {
+ uint8_t index;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(Symb, Entry);
+ index = Entry->SectionIndex;
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(Symb, Entry);
+ index = Entry->SectionIndex;
+ }
+
+ if (index == 0)
+ Res = end_sections();
+ else
+ Res = section_iterator(SectionRef(Sections[index-1], this));
+
return object_error::success;
}
-ObjectFile::symbol_iterator MachOObjectFile::begin_symbols() const {
+error_code MachOObjectFile::getSymbolType(DataRefImpl Symb,
+ SymbolRef::Type &Res) const {
+ uint8_t n_type;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(Symb, Entry);
+ n_type = Entry->Type;
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(Symb, Entry);
+ n_type = Entry->Type;
+ }
+ Res = SymbolRef::ST_Other;
+
+ // If this is a STAB debugging symbol, we can do nothing more.
+ if (n_type & MachO::NlistMaskStab) {
+ Res = SymbolRef::ST_Debug;
+ return object_error::success;
+ }
+
+ switch (n_type & MachO::NlistMaskType) {
+ case MachO::NListTypeUndefined :
+ Res = SymbolRef::ST_Unknown;
+ break;
+ case MachO::NListTypeSection :
+ Res = SymbolRef::ST_Function;
+ break;
+ }
+ return object_error::success;
+}
+
+error_code MachOObjectFile::getSymbolValue(DataRefImpl Symb,
+ uint64_t &Val) const {
+ report_fatal_error("getSymbolValue unimplemented in MachOObjectFile");
+}
+
+symbol_iterator MachOObjectFile::begin_symbols() const {
// DRI.d.a = segment number; DRI.d.b = symbol index.
DataRefImpl DRI;
- DRI.d.a = DRI.d.b = 0;
moveToNextSymbol(DRI);
return symbol_iterator(SymbolRef(DRI, this));
}
-ObjectFile::symbol_iterator MachOObjectFile::end_symbols() const {
+symbol_iterator MachOObjectFile::end_symbols() const {
DataRefImpl DRI;
DRI.d.a = MachOObj->getHeader().NumLoadCommands;
- DRI.d.b = 0;
return symbol_iterator(SymbolRef(DRI, this));
}
+symbol_iterator MachOObjectFile::begin_dynamic_symbols() const {
+ // TODO: implement
+ report_fatal_error("Dynamic symbols unimplemented in MachOObjectFile");
+}
+
+symbol_iterator MachOObjectFile::end_dynamic_symbols() const {
+ // TODO: implement
+ report_fatal_error("Dynamic symbols unimplemented in MachOObjectFile");
+}
+
+library_iterator MachOObjectFile::begin_libraries_needed() const {
+ // TODO: implement
+ report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
+}
+
+library_iterator MachOObjectFile::end_libraries_needed() const {
+ // TODO: implement
+ report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
+}
+
+StringRef MachOObjectFile::getLoadName() const {
+ // TODO: Implement
+ report_fatal_error("get_load_name() unimplemented in MachOObjectFile");
+}
/*===-- Sections ----------------------------------------------------------===*/
MachOObj->ReadSection(LCI, DRI.d.b, Res);
}
+std::size_t MachOObjectFile::getSectionIndex(DataRefImpl Sec) const {
+ SectionList::const_iterator loc =
+ std::find(Sections.begin(), Sections.end(), Sec);
+ assert(loc != Sections.end() && "Sec is not a valid section!");
+ return std::distance(Sections.begin(), loc);
+}
+
void
MachOObjectFile::getSection64(DataRefImpl DRI,
InMemoryStruct<macho::Section64> &Res) const {
StringRef &Result) const {
// FIXME: thread safety.
static char result[34];
- if (is64BitLoadCommand(MachOObj, DRI)) {
+ if (is64BitLoadCommand(MachOObj.get(), DRI)) {
InMemoryStruct<macho::Segment64LoadCommand> SLC;
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
MachOObj->ReadSegment64LoadCommand(LCI, SLC);
InMemoryStruct<macho::Section64> Sect;
MachOObj->ReadSection64(LCI, DRI.d.b, Sect);
- strcpy(result, SLC->Name);
+ strcpy(result, Sect->SegmentName);
strcat(result, ",");
strcat(result, Sect->Name);
} else {
InMemoryStruct<macho::Section> Sect;
MachOObj->ReadSection(LCI, DRI.d.b, Sect);
- strcpy(result, SLC->Name);
+ strcpy(result, Sect->SegmentName);
strcat(result, ",");
strcat(result, Sect->Name);
}
error_code MachOObjectFile::getSectionAddress(DataRefImpl DRI,
uint64_t &Result) const {
- if (is64BitLoadCommand(MachOObj, DRI)) {
+ if (is64BitLoadCommand(MachOObj.get(), DRI)) {
InMemoryStruct<macho::Section64> Sect;
getSection64(DRI, Sect);
Result = Sect->Address;
error_code MachOObjectFile::getSectionSize(DataRefImpl DRI,
uint64_t &Result) const {
- if (is64BitLoadCommand(MachOObj, DRI)) {
+ if (is64BitLoadCommand(MachOObj.get(), DRI)) {
InMemoryStruct<macho::Section64> Sect;
getSection64(DRI, Sect);
Result = Sect->Size;
error_code MachOObjectFile::getSectionContents(DataRefImpl DRI,
StringRef &Result) const {
- if (is64BitLoadCommand(MachOObj, DRI)) {
+ if (is64BitLoadCommand(MachOObj.get(), DRI)) {
InMemoryStruct<macho::Section64> Sect;
getSection64(DRI, Sect);
Result = MachOObj->getData(Sect->Offset, Sect->Size);
return object_error::success;
}
+error_code MachOObjectFile::getSectionAlignment(DataRefImpl DRI,
+ uint64_t &Result) const {
+ if (is64BitLoadCommand(MachOObj.get(), DRI)) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(DRI, Sect);
+ Result = uint64_t(1) << Sect->Align;
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(DRI, Sect);
+ Result = uint64_t(1) << Sect->Align;
+ }
+ return object_error::success;
+}
+
error_code MachOObjectFile::isSectionText(DataRefImpl DRI,
bool &Result) const {
- if (is64BitLoadCommand(MachOObj, DRI)) {
+ if (is64BitLoadCommand(MachOObj.get(), DRI)) {
InMemoryStruct<macho::Section64> Sect;
getSection64(DRI, Sect);
Result = !strcmp(Sect->Name, "__text");
return object_error::success;
}
-ObjectFile::section_iterator MachOObjectFile::begin_sections() const {
+error_code MachOObjectFile::isSectionData(DataRefImpl DRI,
+ bool &Result) const {
+ // FIXME: Unimplemented.
+ Result = false;
+ return object_error::success;
+}
+
+error_code MachOObjectFile::isSectionBSS(DataRefImpl DRI,
+ bool &Result) const {
+ // FIXME: Unimplemented.
+ Result = false;
+ return object_error::success;
+}
+
+error_code MachOObjectFile::isSectionRequiredForExecution(DataRefImpl Sec,
+ bool &Result) const {
+ // FIXME: Unimplemented.
+ Result = true;
+ return object_error::success;
+}
+
+error_code MachOObjectFile::isSectionVirtual(DataRefImpl Sec,
+ bool &Result) const {
+ // FIXME: Unimplemented.
+ Result = false;
+ return object_error::success;
+}
+
+error_code MachOObjectFile::isSectionZeroInit(DataRefImpl DRI,
+ bool &Result) const {
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(DRI, Sect);
+ unsigned SectionType = Sect->Flags & MachO::SectionFlagMaskSectionType;
+ Result = (SectionType == MachO::SectionTypeZeroFill ||
+ SectionType == MachO::SectionTypeZeroFillLarge);
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(DRI, Sect);
+ unsigned SectionType = Sect->Flags & MachO::SectionFlagMaskSectionType;
+ Result = (SectionType == MachO::SectionTypeZeroFill ||
+ SectionType == MachO::SectionTypeZeroFillLarge);
+ }
+
+ return object_error::success;
+}
+
+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;
+}
+
+error_code MachOObjectFile::sectionContainsSymbol(DataRefImpl Sec,
+ DataRefImpl Symb,
+ bool &Result) const {
+ SymbolRef::Type ST;
+ 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;
+
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(Symb, Entry);
+ uint64_t SymAddr= Entry->Value;
+ Result = (SymAddr >= SectBegin) && (SymAddr < SectEnd);
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(Symb, Entry);
+ uint64_t SymAddr= Entry->Value;
+ Result = (SymAddr >= SectBegin) && (SymAddr < SectEnd);
+ }
+
+ return object_error::success;
+}
+
+relocation_iterator MachOObjectFile::getSectionRelBegin(DataRefImpl Sec) const {
+ DataRefImpl ret;
+ ret.d.b = getSectionIndex(Sec);
+ return relocation_iterator(RelocationRef(ret, this));
+}
+relocation_iterator MachOObjectFile::getSectionRelEnd(DataRefImpl Sec) const {
+ uint32_t last_reloc;
+ if (is64BitLoadCommand(MachOObj.get(), Sec)) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(Sec, Sect);
+ last_reloc = Sect->NumRelocationTableEntries;
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(Sec, Sect);
+ last_reloc = Sect->NumRelocationTableEntries;
+ }
+ DataRefImpl ret;
+ ret.d.a = last_reloc;
+ ret.d.b = getSectionIndex(Sec);
+ return relocation_iterator(RelocationRef(ret, this));
+}
+
+section_iterator MachOObjectFile::begin_sections() const {
DataRefImpl DRI;
- DRI.d.a = DRI.d.b = 0;
moveToNextSection(DRI);
return section_iterator(SectionRef(DRI, this));
}
-ObjectFile::section_iterator MachOObjectFile::end_sections() const {
+section_iterator MachOObjectFile::end_sections() const {
DataRefImpl DRI;
DRI.d.a = MachOObj->getHeader().NumLoadCommands;
- DRI.d.b = 0;
return section_iterator(SectionRef(DRI, this));
}
+/*===-- Relocations -------------------------------------------------------===*/
+
+void MachOObjectFile::
+getRelocation(DataRefImpl Rel,
+ InMemoryStruct<macho::RelocationEntry> &Res) const {
+ uint32_t relOffset;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(Sections[Rel.d.b], Sect);
+ relOffset = Sect->RelocationTableOffset;
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(Sections[Rel.d.b], Sect);
+ relOffset = Sect->RelocationTableOffset;
+ }
+ MachOObj->ReadRelocationEntry(relOffset, Rel.d.a, Res);
+}
+error_code MachOObjectFile::getRelocationNext(DataRefImpl Rel,
+ RelocationRef &Res) const {
+ ++Rel.d.a;
+ Res = RelocationRef(Rel, this);
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationAddress(DataRefImpl Rel,
+ uint64_t &Res) const {
+ const uint8_t* sectAddress = 0;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(Sections[Rel.d.b], Sect);
+ sectAddress += Sect->Address;
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(Sections[Rel.d.b], Sect);
+ sectAddress += Sect->Address;
+ }
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+ uint64_t RelAddr = 0;
+ if (isScattered)
+ RelAddr = RE->Word0 & 0xFFFFFF;
+ else
+ RelAddr = RE->Word0;
+
+ Res = reinterpret_cast<uintptr_t>(sectAddress + RelAddr);
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationOffset(DataRefImpl Rel,
+ uint64_t &Res) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+ if (isScattered)
+ Res = RE->Word0 & 0xFFFFFF;
+ else
+ Res = RE->Word0;
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationSymbol(DataRefImpl Rel,
+ SymbolRef &Res) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+ uint32_t SymbolIdx = RE->Word1 & 0xffffff;
+ bool isExtern = (RE->Word1 >> 27) & 1;
+
+ DataRefImpl Sym;
+ moveToNextSymbol(Sym);
+ if (isExtern) {
+ for (unsigned i = 0; i < SymbolIdx; i++) {
+ Sym.d.b++;
+ moveToNextSymbol(Sym);
+ assert(Sym.d.a < MachOObj->getHeader().NumLoadCommands &&
+ "Relocation symbol index out of range!");
+ }
+ }
+ Res = SymbolRef(Sym, this);
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationType(DataRefImpl Rel,
+ uint64_t &Res) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+ Res = RE->Word0;
+ Res <<= 32;
+ Res |= RE->Word1;
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationTypeName(DataRefImpl Rel,
+ SmallVectorImpl<char> &Result) const {
+ // TODO: Support scattered relocations.
+ StringRef res;
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+
+ unsigned r_type;
+ if (isScattered)
+ r_type = (RE->Word0 >> 24) & 0xF;
+ else
+ r_type = (RE->Word1 >> 28) & 0xF;
+
+ switch (Arch) {
+ case Triple::x86: {
+ static const char *const Table[] = {
+ "GENERIC_RELOC_VANILLA",
+ "GENERIC_RELOC_PAIR",
+ "GENERIC_RELOC_SECTDIFF",
+ "GENERIC_RELOC_PB_LA_PTR",
+ "GENERIC_RELOC_LOCAL_SECTDIFF",
+ "GENERIC_RELOC_TLV" };
+
+ if (r_type > 6)
+ res = "Unknown";
+ else
+ res = Table[r_type];
+ break;
+ }
+ case Triple::x86_64: {
+ static const char *const Table[] = {
+ "X86_64_RELOC_UNSIGNED",
+ "X86_64_RELOC_SIGNED",
+ "X86_64_RELOC_BRANCH",
+ "X86_64_RELOC_GOT_LOAD",
+ "X86_64_RELOC_GOT",
+ "X86_64_RELOC_SUBTRACTOR",
+ "X86_64_RELOC_SIGNED_1",
+ "X86_64_RELOC_SIGNED_2",
+ "X86_64_RELOC_SIGNED_4",
+ "X86_64_RELOC_TLV" };
+
+ if (r_type > 9)
+ res = "Unknown";
+ else
+ res = Table[r_type];
+ break;
+ }
+ case Triple::arm: {
+ static const char *const Table[] = {
+ "ARM_RELOC_VANILLA",
+ "ARM_RELOC_PAIR",
+ "ARM_RELOC_SECTDIFF",
+ "ARM_RELOC_LOCAL_SECTDIFF",
+ "ARM_RELOC_PB_LA_PTR",
+ "ARM_RELOC_BR24",
+ "ARM_THUMB_RELOC_BR22",
+ "ARM_THUMB_32BIT_BRANCH",
+ "ARM_RELOC_HALF",
+ "ARM_RELOC_HALF_SECTDIFF" };
+
+ if (r_type > 9)
+ res = "Unknown";
+ else
+ res = Table[r_type];
+ break;
+ }
+ case Triple::ppc: {
+ static const char *const Table[] = {
+ "PPC_RELOC_VANILLA",
+ "PPC_RELOC_PAIR",
+ "PPC_RELOC_BR14",
+ "PPC_RELOC_BR24",
+ "PPC_RELOC_HI16",
+ "PPC_RELOC_LO16",
+ "PPC_RELOC_HA16",
+ "PPC_RELOC_LO14",
+ "PPC_RELOC_SECTDIFF",
+ "PPC_RELOC_PB_LA_PTR",
+ "PPC_RELOC_HI16_SECTDIFF",
+ "PPC_RELOC_LO16_SECTDIFF",
+ "PPC_RELOC_HA16_SECTDIFF",
+ "PPC_RELOC_JBSR",
+ "PPC_RELOC_LO14_SECTDIFF",
+ "PPC_RELOC_LOCAL_SECTDIFF" };
+
+ res = Table[r_type];
+ break;
+ }
+ case Triple::UnknownArch:
+ res = "Unknown";
+ break;
+ }
+ Result.append(res.begin(), res.end());
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel,
+ int64_t &Res) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+ bool isExtern = (RE->Word1 >> 27) & 1;
+ Res = 0;
+ if (!isExtern) {
+ const uint8_t* sectAddress = base();
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(Sections[Rel.d.b], Sect);
+ sectAddress += Sect->Offset;
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(Sections[Rel.d.b], Sect);
+ sectAddress += Sect->Offset;
+ }
+ Res = reinterpret_cast<uintptr_t>(sectAddress);
+ }
+ return object_error::success;
+}
+
+// Helper to advance a section or symbol iterator multiple increments at a time.
+template<class T>
+error_code advance(T &it, size_t Val) {
+ error_code ec;
+ while (Val--) {
+ it.increment(ec);
+ }
+ return ec;
+}
+
+template<class T>
+void advanceTo(T &it, size_t Val) {
+ if (error_code ec = advance(it, Val))
+ report_fatal_error(ec.message());
+}
+
+void MachOObjectFile::printRelocationTargetName(
+ InMemoryStruct<macho::RelocationEntry>& RE,
+ raw_string_ostream &fmt) const {
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+
+ // 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 = RE->Word1;
+
+ error_code ec;
+ for (symbol_iterator SI = begin_symbols(), SE = end_symbols(); SI != SE;
+ SI.increment(ec)) {
+ if (ec) report_fatal_error(ec.message());
+
+ uint64_t Addr;
+ StringRef Name;
+
+ if ((ec = SI->getAddress(Addr)))
+ report_fatal_error(ec.message());
+ if (Addr != Val) continue;
+ if ((ec = SI->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 (section_iterator SI = begin_sections(), SE = end_sections(); SI != SE;
+ SI.increment(ec)) {
+ if (ec) report_fatal_error(ec.message());
+
+ uint64_t Addr;
+ StringRef Name;
+
+ if ((ec = SI->getAddress(Addr)))
+ report_fatal_error(ec.message());
+ if (Addr != Val) continue;
+ if ((ec = SI->getName(Name)))
+ report_fatal_error(ec.message());
+ fmt << Name;
+ return;
+ }
+
+ fmt << format("0x%x", Val);
+ return;
+ }
+
+ StringRef S;
+ bool isExtern = (RE->Word1 >> 27) & 1;
+ uint32_t Val = RE->Word1 & 0xFFFFFF;
+
+ if (isExtern) {
+ symbol_iterator SI = begin_symbols();
+ advanceTo(SI, Val);
+ SI->getName(S);
+ } else {
+ section_iterator SI = begin_sections();
+ advanceTo(SI, Val);
+ SI->getName(S);
+ }
+
+ fmt << S;
+}
+
+error_code MachOObjectFile::getRelocationValueString(DataRefImpl Rel,
+ SmallVectorImpl<char> &Result) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+
+ std::string fmtbuf;
+ raw_string_ostream fmt(fmtbuf);
+
+ unsigned Type;
+ if (isScattered)
+ Type = (RE->Word0 >> 24) & 0xF;
+ else
+ Type = (RE->Word1 >> 28) & 0xF;
+
+ bool isPCRel;
+ if (isScattered)
+ isPCRel = ((RE->Word0 >> 30) & 1);
+ else
+ isPCRel = ((RE->Word1 >> 24) & 1);
+
+ // 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 = ((RE->Word1 >> 24) & 1);
+
+ switch (Type) {
+ case macho::RIT_X86_64_GOTLoad: // X86_64_RELOC_GOT_LOAD
+ case macho::RIT_X86_64_GOT: { // X86_64_RELOC_GOT
+ printRelocationTargetName(RE, fmt);
+ fmt << "@GOT";
+ if (isPCRel) fmt << "PCREL";
+ break;
+ }
+ case macho::RIT_X86_64_Subtractor: { // X86_64_RELOC_SUBTRACTOR
+ InMemoryStruct<macho::RelocationEntry> RENext;
+ DataRefImpl RelNext = Rel;
+ RelNext.d.a++;
+ getRelocation(RelNext, RENext);
+
+ // X86_64_SUBTRACTOR must be followed by a relocation of type
+ // X86_64_RELOC_UNSIGNED.
+ // NOTE: Scattered relocations don't exist on x86_64.
+ unsigned RType = (RENext->Word1 >> 28) & 0xF;
+ if (RType != 0)
+ report_fatal_error("Expected X86_64_RELOC_UNSIGNED after "
+ "X86_64_RELOC_SUBTRACTOR.");
+
+ // The X86_64_RELOC_UNSIGNED contains the minuend symbol,
+ // X86_64_SUBTRACTOR contains to the subtrahend.
+ printRelocationTargetName(RENext, fmt);
+ fmt << "-";
+ printRelocationTargetName(RE, fmt);
+ }
+ case macho::RIT_X86_64_TLV:
+ printRelocationTargetName(RE, fmt);
+ fmt << "@TLV";
+ if (isPCRel) fmt << "P";
+ break;
+ case macho::RIT_X86_64_Signed1: // X86_64_RELOC_SIGNED1
+ printRelocationTargetName(RE, fmt);
+ fmt << "-1";
+ break;
+ case macho::RIT_X86_64_Signed2: // X86_64_RELOC_SIGNED2
+ printRelocationTargetName(RE, fmt);
+ fmt << "-2";
+ break;
+ case macho::RIT_X86_64_Signed4: // X86_64_RELOC_SIGNED4
+ printRelocationTargetName(RE, fmt);
+ fmt << "-4";
+ break;
+ default:
+ printRelocationTargetName(RE, fmt);
+ break;
+ }
+ // X86 and ARM share some relocation types in common.
+ } else if (Arch == Triple::x86 || Arch == Triple::arm) {
+ // Generic relocation types...
+ switch (Type) {
+ case macho::RIT_Pair: // GENERIC_RELOC_PAIR - prints no info
+ return object_error::success;
+ case macho::RIT_Difference: { // GENERIC_RELOC_SECTDIFF
+ InMemoryStruct<macho::RelocationEntry> RENext;
+ DataRefImpl RelNext = Rel;
+ RelNext.d.a++;
+ getRelocation(RelNext, RENext);
+
+ // X86 sect diff's must be followed by a relocation of type
+ // GENERIC_RELOC_PAIR.
+ bool isNextScattered = (Arch != Triple::x86_64) &&
+ (RENext->Word0 & macho::RF_Scattered);
+ unsigned RType;
+ if (isNextScattered)
+ RType = (RENext->Word0 >> 24) & 0xF;
+ else
+ RType = (RENext->Word1 >> 28) & 0xF;
+ if (RType != 1)
+ report_fatal_error("Expected GENERIC_RELOC_PAIR after "
+ "GENERIC_RELOC_SECTDIFF.");
+
+ printRelocationTargetName(RE, fmt);
+ fmt << "-";
+ printRelocationTargetName(RENext, fmt);
+ break;
+ }
+ }
+
+ if (Arch == Triple::x86) {
+ // All X86 relocations that need special printing were already
+ // handled in the generic code.
+ switch (Type) {
+ case macho::RIT_Generic_LocalDifference:{// GENERIC_RELOC_LOCAL_SECTDIFF
+ InMemoryStruct<macho::RelocationEntry> RENext;
+ DataRefImpl RelNext = Rel;
+ RelNext.d.a++;
+ getRelocation(RelNext, RENext);
+
+ // X86 sect diff's must be followed by a relocation of type
+ // GENERIC_RELOC_PAIR.
+ bool isNextScattered = (Arch != Triple::x86_64) &&
+ (RENext->Word0 & macho::RF_Scattered);
+ unsigned RType;
+ if (isNextScattered)
+ RType = (RENext->Word0 >> 24) & 0xF;
+ else
+ RType = (RENext->Word1 >> 28) & 0xF;
+ if (RType != 1)
+ report_fatal_error("Expected GENERIC_RELOC_PAIR after "
+ "GENERIC_RELOC_LOCAL_SECTDIFF.");
+
+ printRelocationTargetName(RE, fmt);
+ fmt << "-";
+ printRelocationTargetName(RENext, fmt);
+ break;
+ }
+ case macho::RIT_Generic_TLV: {
+ printRelocationTargetName(RE, fmt);
+ fmt << "@TLV";
+ if (isPCRel) fmt << "P";
+ break;
+ }
+ default:
+ printRelocationTargetName(RE, fmt);
+ }
+ } else { // ARM-specific relocations
+ switch (Type) {
+ case macho::RIT_ARM_Half: // ARM_RELOC_HALF
+ case macho::RIT_ARM_HalfDifference: { // 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;
+ if (isScattered)
+ isUpper = (RE->Word0 >> 28) & 1;
+ else
+ isUpper = (RE->Word1 >> 25) & 1;
+
+ if (isUpper)
+ fmt << ":upper16:(";
+ else
+ fmt << ":lower16:(";
+ printRelocationTargetName(RE, fmt);
+
+ InMemoryStruct<macho::RelocationEntry> RENext;
+ DataRefImpl RelNext = Rel;
+ RelNext.d.a++;
+ getRelocation(RelNext, RENext);
+
+ // ARM half relocs must be followed by a relocation of type
+ // ARM_RELOC_PAIR.
+ bool isNextScattered = (Arch != Triple::x86_64) &&
+ (RENext->Word0 & macho::RF_Scattered);
+ unsigned RType;
+ if (isNextScattered)
+ RType = (RENext->Word0 >> 24) & 0xF;
+ else
+ RType = (RENext->Word1 >> 28) & 0xF;
+
+ if (RType != 1)
+ report_fatal_error("Expected ARM_RELOC_PAIR after "
+ "GENERIC_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::RIT_ARM_HalfDifference) {
+ fmt << "-";
+ printRelocationTargetName(RENext, fmt);
+ }
+
+ fmt << ")";
+ break;
+ }
+ default: {
+ printRelocationTargetName(RE, fmt);
+ }
+ }
+ }
+ } else
+ printRelocationTargetName(RE, fmt);
+
+ fmt.flush();
+ Result.append(fmtbuf.begin(), fmtbuf.end());
+ return object_error::success;
+}
+
+error_code MachOObjectFile::getRelocationHidden(DataRefImpl Rel,
+ bool &Result) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+ unsigned Type;
+ if (isScattered)
+ Type = (RE->Word0 >> 24) & 0xF;
+ else
+ Type = (RE->Word1 >> 28) & 0xF;
+
+ Result = false;
+
+ // On arches that use the generic relocations, GENERIC_RELOC_PAIR
+ // is always hidden.
+ if (Arch == Triple::x86 || Arch == Triple::arm) {
+ if (Type == macho::RIT_Pair) Result = true;
+ } else if (Arch == Triple::x86_64) {
+ // On x86_64, X86_64_RELOC_UNSIGNED is hidden only when it follows
+ // an X864_64_RELOC_SUBTRACTOR.
+ if (Type == macho::RIT_X86_64_Unsigned && Rel.d.a > 0) {
+ DataRefImpl RelPrev = Rel;
+ RelPrev.d.a--;
+ InMemoryStruct<macho::RelocationEntry> REPrev;
+ getRelocation(RelPrev, REPrev);
+
+ unsigned PrevType = (REPrev->Word1 >> 28) & 0xF;
+
+ if (PrevType == macho::RIT_X86_64_Subtractor) Result = true;
+ }
+ }
+
+ return object_error::success;
+}
+
+error_code MachOObjectFile::getLibraryNext(DataRefImpl LibData,
+ LibraryRef &Res) const {
+ report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
+}
+
+error_code MachOObjectFile::getLibraryPath(DataRefImpl LibData,
+ StringRef &Res) const {
+ report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
+}
+
+
/*===-- Miscellaneous -----------------------------------------------------===*/
uint8_t MachOObjectFile::getBytesInAddress() const {
}
}
+} // end namespace object
} // end namespace llvm
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projects / oota-llvm.git / blobdiff