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-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp235
1 files changed, 156 insertions, 79 deletions
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
index 58fb51557c93..21893d2909ed 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
@@ -12,35 +12,49 @@
//===----------------------------------------------------------------------===//
#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::LoadedObjectInfo {
+public:
+ LoadedMachOObjectInfo(RuntimeDyldImpl &RTDyld, unsigned BeginIdx,
+ unsigned EndIdx)
+ : RuntimeDyld::LoadedObjectInfo(RTDyld, BeginIdx, EndIdx) {}
+
+ OwningBinary<ObjectFile>
+ getObjectForDebug(const ObjectFile &Obj) const override {
+ return OwningBinary<ObjectFile>();
+ }
+};
+
+}
+
namespace llvm {
-uint64_t RuntimeDyldMachO::decodeAddend(uint8_t *LocalAddress, unsigned NumBytes,
- uint32_t RelType) const {
- uint64_t Addend = 0;
- memcpy(&Addend, LocalAddress, NumBytes);
- return Addend;
+int64_t RuntimeDyldMachO::memcpyAddend(const RelocationEntry &RE) const {
+ unsigned NumBytes = 1 << RE.Size;
+ uint8_t *Src = Sections[RE.SectionID].Address + RE.Offset;
+
+ return static_cast<int64_t>(readBytesUnaligned(Src, NumBytes));
}
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;
@@ -50,38 +64,32 @@ RelocationValueRef RuntimeDyldMachO::getRelocationValueRef(
symbol_iterator Symbol = RI->getSymbol();
StringRef TargetName;
Symbol->getName(TargetName);
- SymbolTableMap::const_iterator SI = Symbols.find(TargetName.data());
- if (SI != Symbols.end()) {
+ SymbolTableMap::const_iterator SI =
+ GlobalSymbolTable.find(TargetName.data());
+ if (SI != GlobalSymbolTable.end()) {
Value.SectionID = SI->second.first;
- Value.Addend = SI->second.second + RE.Addend;
+ Value.Offset = SI->second.second + 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;
+ 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 relocation_iterator &RI) {
+ 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());
@@ -89,8 +97,7 @@ void RuntimeDyldMachO::makeValueAddendPCRel(RelocationValueRef &Value,
if (IsPCRel) {
uint64_t RelocAddr = 0;
RI->getAddress(RelocAddr);
- unsigned RelocSize = Obj.getAnyRelocationLength(RelInfo);
- Value.Addend += RelocAddr + (1ULL << RelocSize);
+ Value.Offset += RelocAddr + OffsetToNextPC;
}
}
@@ -102,80 +109,142 @@ void RuntimeDyldMachO::dumpRelocationToResolve(const RelocationEntry &RE,
dbgs() << "resolveRelocation Section: " << RE.SectionID
<< " LocalAddress: " << format("%p", LocalAddress)
- << " FinalAddress: " << format("%p", FinalAddress)
- << " Value: " << format("%p", Value) << " Addend: " << RE.Addend
+ << " FinalAddress: " << format("0x%016" PRIx64, FinalAddress)
+ << " Value: " << format("0x%016" PRIx64, Value) << " Addend: " << RE.Addend
<< " isPCRel: " << RE.IsPCRel << " MachoType: " << RE.RelType
<< " Size: " << (1 << RE.Size) << "\n";
}
-bool RuntimeDyldMachO::writeBytesUnaligned(uint8_t *Addr, uint64_t Value,
- unsigned Size) {
- for (unsigned i = 0; i < Size; ++i) {
- *Addr++ = (uint8_t)Value;
- Value >>= 8;
+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 false;
+ return SE;
}
-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;
+
+// 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();
+template <typename Impl>
+void RuntimeDyldMachOCRTPBase<Impl>::finalizeLoad(const ObjectFile &ObjImg,
+ ObjSectionToIDMap &SectionMap) {
+ unsigned EHFrameSID = RTDYLD_INVALID_SECTION_ID;
+ unsigned TextSID = RTDYLD_INVALID_SECTION_ID;
+ unsigned ExceptTabSID = RTDYLD_INVALID_SECTION_ID;
+ ObjSectionToIDMap::iterator i, e;
+
+ for (i = SectionMap.begin(), e = SectionMap.end(); i != e; ++i) {
+ const SectionRef &Section = i->first;
+ StringRef Name;
+ Section.getName(Name);
+ if (Name == "__eh_frame")
+ EHFrameSID = i->second;
+ else if (Name == "__text")
+ TextSID = i->second;
+ else if (Name == "__gcc_except_tab")
+ ExceptTabSID = i->second;
+ else
+ impl().finalizeSection(ObjImg, i->second, Section);
+ }
+ UnregisteredEHFrameSections.push_back(
+ EHFrameRelatedSections(EHFrameSID, TextSID, ExceptTabSID));
}
-static unsigned char *processFDE(unsigned char *P, intptr_t DeltaForText,
- intptr_t DeltaForEH) {
+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 = A->ObjAddress - 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;
@@ -190,8 +259,8 @@ void RuntimeDyldMachO::registerEHFrames() {
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);
@@ -208,16 +277,24 @@ void RuntimeDyldMachO::registerEHFrames() {
}
std::unique_ptr<RuntimeDyldMachO>
-llvm::RuntimeDyldMachO::create(Triple::ArchType Arch, RTDyldMemoryManager *MM) {
+RuntimeDyldMachO::create(Triple::ArchType Arch, RTDyldMemoryManager *MM) {
switch (Arch) {
default:
llvm_unreachable("Unsupported target for RuntimeDyldMachO.");
break;
case Triple::arm: return make_unique<RuntimeDyldMachOARM>(MM);
- case Triple::arm64: return make_unique<RuntimeDyldMachOAArch64>(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);
}
}
+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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