//===----------------------------------------------------------------------===//
#include "RuntimeDyldMachO.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringRef.h"
-
-#include "Targets/RuntimeDyldMachOARM.h"
#include "Targets/RuntimeDyldMachOAArch64.h"
+#include "Targets/RuntimeDyldMachOARM.h"
#include "Targets/RuntimeDyldMachOI386.h"
#include "Targets/RuntimeDyldMachOX86_64.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringRef.h"
using namespace llvm;
using namespace llvm::object;
#define DEBUG_TYPE "dyld"
+namespace {
+
+class LoadedMachOObjectInfo
+ : public RuntimeDyld::LoadedObjectInfoHelper<LoadedMachOObjectInfo> {
+public:
+ LoadedMachOObjectInfo(RuntimeDyldImpl &RTDyld, unsigned BeginIdx,
+ unsigned EndIdx)
+ : LoadedObjectInfoHelper(RTDyld, BeginIdx, EndIdx) {}
+
+ OwningBinary<ObjectFile>
+ getObjectForDebug(const ObjectFile &Obj) const override {
+ return OwningBinary<ObjectFile>();
+ }
+};
+
+}
+
namespace llvm {
int64_t RuntimeDyldMachO::memcpyAddend(const RelocationEntry &RE) const {
}
RelocationValueRef RuntimeDyldMachO::getRelocationValueRef(
- ObjectImage &ObjImg, const relocation_iterator &RI,
- const RelocationEntry &RE, ObjSectionToIDMap &ObjSectionToID,
- const SymbolTableMap &Symbols) {
+ const ObjectFile &BaseTObj, const relocation_iterator &RI,
+ const RelocationEntry &RE, ObjSectionToIDMap &ObjSectionToID) {
const MachOObjectFile &Obj =
- static_cast<const MachOObjectFile &>(*ObjImg.getObjectFile());
+ static_cast<const MachOObjectFile &>(BaseTObj);
MachO::any_relocation_info RelInfo =
Obj.getRelocation(RI->getRawDataRefImpl());
RelocationValueRef Value;
symbol_iterator Symbol = RI->getSymbol();
StringRef TargetName;
Symbol->getName(TargetName);
- SymbolTableMap::const_iterator SI = Symbols.find(TargetName.data());
- if (SI != Symbols.end()) {
- Value.SectionID = SI->second.first;
- Value.Addend = SI->second.second + RE.Addend;
+ RTDyldSymbolTable::const_iterator SI =
+ GlobalSymbolTable.find(TargetName.data());
+ if (SI != GlobalSymbolTable.end()) {
+ const auto &SymInfo = SI->second;
+ Value.SectionID = SymInfo.getSectionID();
+ Value.Offset = SymInfo.getOffset() + RE.Addend;
} else {
- SI = GlobalSymbolTable.find(TargetName.data());
- if (SI != GlobalSymbolTable.end()) {
- Value.SectionID = SI->second.first;
- Value.Addend = SI->second.second + RE.Addend;
- } else {
- Value.SymbolName = TargetName.data();
- Value.Addend = RE.Addend;
- }
+ Value.SymbolName = TargetName.data();
+ Value.Offset = RE.Addend;
}
} else {
- SectionRef Sec = Obj.getRelocationSection(RelInfo);
- bool IsCode = false;
- Sec.isText(IsCode);
- Value.SectionID = findOrEmitSection(ObjImg, Sec, IsCode, ObjSectionToID);
- uint64_t Addr;
- Sec.getAddress(Addr);
- Value.Addend = RE.Addend - Addr;
+ SectionRef Sec = Obj.getAnyRelocationSection(RelInfo);
+ bool IsCode = Sec.isText();
+ Value.SectionID = findOrEmitSection(Obj, Sec, IsCode, ObjSectionToID);
+ uint64_t Addr = Sec.getAddress();
+ Value.Offset = RE.Addend - Addr;
}
return Value;
}
void RuntimeDyldMachO::makeValueAddendPCRel(RelocationValueRef &Value,
- ObjectImage &ObjImg,
+ const ObjectFile &BaseTObj,
const relocation_iterator &RI,
unsigned OffsetToNextPC) {
const MachOObjectFile &Obj =
- static_cast<const MachOObjectFile &>(*ObjImg.getObjectFile());
+ static_cast<const MachOObjectFile &>(BaseTObj);
MachO::any_relocation_info RelInfo =
Obj.getRelocation(RI->getRawDataRefImpl());
if (IsPCRel) {
uint64_t RelocAddr = 0;
RI->getAddress(RelocAddr);
- Value.Addend += RelocAddr + OffsetToNextPC;
+ Value.Offset += RelocAddr + OffsetToNextPC;
}
}
<< " Size: " << (1 << RE.Size) << "\n";
}
-bool
-RuntimeDyldMachO::isCompatibleFormat(const ObjectBuffer *InputBuffer) const {
- if (InputBuffer->getBufferSize() < 4)
- return false;
- StringRef Magic(InputBuffer->getBufferStart(), 4);
- if (Magic == "\xFE\xED\xFA\xCE")
- return true;
- if (Magic == "\xCE\xFA\xED\xFE")
- return true;
- if (Magic == "\xFE\xED\xFA\xCF")
- return true;
- if (Magic == "\xCF\xFA\xED\xFE")
- return true;
- return false;
+section_iterator
+RuntimeDyldMachO::getSectionByAddress(const MachOObjectFile &Obj,
+ uint64_t Addr) {
+ section_iterator SI = Obj.section_begin();
+ section_iterator SE = Obj.section_end();
+
+ for (; SI != SE; ++SI) {
+ uint64_t SAddr = SI->getAddress();
+ uint64_t SSize = SI->getSize();
+ if ((Addr >= SAddr) && (Addr < SAddr + SSize))
+ return SI;
+ }
+
+ return SE;
+}
+
+
+// Populate __pointers section.
+void RuntimeDyldMachO::populateIndirectSymbolPointersSection(
+ const MachOObjectFile &Obj,
+ const SectionRef &PTSection,
+ unsigned PTSectionID) {
+ assert(!Obj.is64Bit() &&
+ "Pointer table section not supported in 64-bit MachO.");
+
+ MachO::dysymtab_command DySymTabCmd = Obj.getDysymtabLoadCommand();
+ MachO::section Sec32 = Obj.getSection(PTSection.getRawDataRefImpl());
+ uint32_t PTSectionSize = Sec32.size;
+ unsigned FirstIndirectSymbol = Sec32.reserved1;
+ const unsigned PTEntrySize = 4;
+ unsigned NumPTEntries = PTSectionSize / PTEntrySize;
+ unsigned PTEntryOffset = 0;
+
+ assert((PTSectionSize % PTEntrySize) == 0 &&
+ "Pointers section does not contain a whole number of stubs?");
+
+ DEBUG(dbgs() << "Populating pointer table section "
+ << Sections[PTSectionID].Name
+ << ", Section ID " << PTSectionID << ", "
+ << NumPTEntries << " entries, " << PTEntrySize
+ << " bytes each:\n");
+
+ for (unsigned i = 0; i < NumPTEntries; ++i) {
+ unsigned SymbolIndex =
+ Obj.getIndirectSymbolTableEntry(DySymTabCmd, FirstIndirectSymbol + i);
+ symbol_iterator SI = Obj.getSymbolByIndex(SymbolIndex);
+ StringRef IndirectSymbolName;
+ SI->getName(IndirectSymbolName);
+ DEBUG(dbgs() << " " << IndirectSymbolName << ": index " << SymbolIndex
+ << ", PT offset: " << PTEntryOffset << "\n");
+ RelocationEntry RE(PTSectionID, PTEntryOffset,
+ MachO::GENERIC_RELOC_VANILLA, 0, false, 2);
+ addRelocationForSymbol(RE, IndirectSymbolName);
+ PTEntryOffset += PTEntrySize;
+ }
}
-bool RuntimeDyldMachO::isCompatibleFile(const object::ObjectFile *Obj) const {
- return Obj->isMachO();
+bool RuntimeDyldMachO::isCompatibleFile(const object::ObjectFile &Obj) const {
+ return Obj.isMachO();
}
-static unsigned char *processFDE(unsigned char *P, intptr_t DeltaForText,
- intptr_t DeltaForEH) {
+template <typename Impl>
+void RuntimeDyldMachOCRTPBase<Impl>::finalizeLoad(const ObjectFile &Obj,
+ ObjSectionToIDMap &SectionMap) {
+ unsigned EHFrameSID = RTDYLD_INVALID_SECTION_ID;
+ unsigned TextSID = RTDYLD_INVALID_SECTION_ID;
+ unsigned ExceptTabSID = RTDYLD_INVALID_SECTION_ID;
+
+ for (const auto &Section : Obj.sections()) {
+ StringRef Name;
+ Section.getName(Name);
+
+ // Force emission of the __text, __eh_frame, and __gcc_except_tab sections
+ // if they're present. Otherwise call down to the impl to handle other
+ // sections that have already been emitted.
+ if (Name == "__text")
+ TextSID = findOrEmitSection(Obj, Section, true, SectionMap);
+ else if (Name == "__eh_frame")
+ EHFrameSID = findOrEmitSection(Obj, Section, false, SectionMap);
+ else if (Name == "__gcc_except_tab")
+ ExceptTabSID = findOrEmitSection(Obj, Section, true, SectionMap);
+ else {
+ auto I = SectionMap.find(Section);
+ if (I != SectionMap.end())
+ impl().finalizeSection(Obj, I->second, Section);
+ }
+ }
+ UnregisteredEHFrameSections.push_back(
+ EHFrameRelatedSections(EHFrameSID, TextSID, ExceptTabSID));
+}
+
+template <typename Impl>
+unsigned char *RuntimeDyldMachOCRTPBase<Impl>::processFDE(unsigned char *P,
+ int64_t DeltaForText,
+ int64_t DeltaForEH) {
+ typedef typename Impl::TargetPtrT TargetPtrT;
+
DEBUG(dbgs() << "Processing FDE: Delta for text: " << DeltaForText
<< ", Delta for EH: " << DeltaForEH << "\n");
- uint32_t Length = *((uint32_t *)P);
+ uint32_t Length = readBytesUnaligned(P, 4);
P += 4;
unsigned char *Ret = P + Length;
- uint32_t Offset = *((uint32_t *)P);
+ uint32_t Offset = readBytesUnaligned(P, 4);
if (Offset == 0) // is a CIE
return Ret;
P += 4;
- intptr_t FDELocation = *((intptr_t *)P);
- intptr_t NewLocation = FDELocation - DeltaForText;
- *((intptr_t *)P) = NewLocation;
- P += sizeof(intptr_t);
+ TargetPtrT FDELocation = readBytesUnaligned(P, sizeof(TargetPtrT));
+ TargetPtrT NewLocation = FDELocation - DeltaForText;
+ writeBytesUnaligned(NewLocation, P, sizeof(TargetPtrT));
+
+ P += sizeof(TargetPtrT);
// Skip the FDE address range
- P += sizeof(intptr_t);
+ P += sizeof(TargetPtrT);
uint8_t Augmentationsize = *P;
P += 1;
if (Augmentationsize != 0) {
- intptr_t LSDA = *((intptr_t *)P);
- intptr_t NewLSDA = LSDA - DeltaForEH;
- *((intptr_t *)P) = NewLSDA;
+ TargetPtrT LSDA = readBytesUnaligned(P, sizeof(TargetPtrT));
+ TargetPtrT NewLSDA = LSDA - DeltaForEH;
+ writeBytesUnaligned(NewLSDA, P, sizeof(TargetPtrT));
}
return Ret;
}
-static intptr_t computeDelta(SectionEntry *A, SectionEntry *B) {
- intptr_t ObjDistance = A->ObjAddress - B->ObjAddress;
- intptr_t MemDistance = A->LoadAddress - B->LoadAddress;
+static int64_t computeDelta(SectionEntry *A, SectionEntry *B) {
+ int64_t ObjDistance =
+ static_cast<int64_t>(A->ObjAddress) - static_cast<int64_t>(B->ObjAddress);
+ int64_t MemDistance = A->LoadAddress - B->LoadAddress;
return ObjDistance - MemDistance;
}
-void RuntimeDyldMachO::registerEHFrames() {
+template <typename Impl>
+void RuntimeDyldMachOCRTPBase<Impl>::registerEHFrames() {
- if (!MemMgr)
- return;
for (int i = 0, e = UnregisteredEHFrameSections.size(); i != e; ++i) {
EHFrameRelatedSections &SectionInfo = UnregisteredEHFrameSections[i];
if (SectionInfo.EHFrameSID == RTDYLD_INVALID_SECTION_ID ||
if (SectionInfo.ExceptTabSID != RTDYLD_INVALID_SECTION_ID)
ExceptTab = &Sections[SectionInfo.ExceptTabSID];
- intptr_t DeltaForText = computeDelta(Text, EHFrame);
- intptr_t DeltaForEH = 0;
+ int64_t DeltaForText = computeDelta(Text, EHFrame);
+ int64_t DeltaForEH = 0;
if (ExceptTab)
DeltaForEH = computeDelta(ExceptTab, EHFrame);
P = processFDE(P, DeltaForText, DeltaForEH);
} while (P != End);
- MemMgr->registerEHFrames(EHFrame->Address, EHFrame->LoadAddress,
- EHFrame->Size);
+ MemMgr.registerEHFrames(EHFrame->Address, EHFrame->LoadAddress,
+ EHFrame->Size);
}
UnregisteredEHFrameSections.clear();
}
std::unique_ptr<RuntimeDyldMachO>
-llvm::RuntimeDyldMachO::create(Triple::ArchType Arch, RTDyldMemoryManager *MM) {
+RuntimeDyldMachO::create(Triple::ArchType Arch,
+ RuntimeDyld::MemoryManager &MemMgr,
+ RuntimeDyld::SymbolResolver &Resolver) {
switch (Arch) {
default:
llvm_unreachable("Unsupported target for RuntimeDyldMachO.");
break;
- case Triple::arm: return make_unique<RuntimeDyldMachOARM>(MM);
- case Triple::aarch64: return make_unique<RuntimeDyldMachOAArch64>(MM);
- case Triple::x86: return make_unique<RuntimeDyldMachOI386>(MM);
- case Triple::x86_64: return make_unique<RuntimeDyldMachOX86_64>(MM);
+ case Triple::arm:
+ return make_unique<RuntimeDyldMachOARM>(MemMgr, Resolver);
+ case Triple::aarch64:
+ return make_unique<RuntimeDyldMachOAArch64>(MemMgr, Resolver);
+ case Triple::x86:
+ return make_unique<RuntimeDyldMachOI386>(MemMgr, Resolver);
+ case Triple::x86_64:
+ return make_unique<RuntimeDyldMachOX86_64>(MemMgr, Resolver);
}
}
+std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
+RuntimeDyldMachO::loadObject(const object::ObjectFile &O) {
+ unsigned SectionStartIdx, SectionEndIdx;
+ std::tie(SectionStartIdx, SectionEndIdx) = loadObjectImpl(O);
+ return llvm::make_unique<LoadedMachOObjectInfo>(*this, SectionStartIdx,
+ SectionEndIdx);
+}
+
} // end namespace llvm
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