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diff --git a/contrib/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp b/contrib/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
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+++ b/contrib/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
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+//===-- RuntimeDyld.cpp - Run-time dynamic linker for MC-JIT ----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implementation of the MC-JIT runtime dynamic linker.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "dyld"
+#include "llvm/ExecutionEngine/RuntimeDyld.h"
+#include "ObjectImageCommon.h"
+#include "RuntimeDyldELF.h"
+#include "RuntimeDyldImpl.h"
+#include "RuntimeDyldMachO.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/Path.h"
+
+using namespace llvm;
+using namespace llvm::object;
+
+// Empty out-of-line virtual destructor as the key function.
+RTDyldMemoryManager::~RTDyldMemoryManager() {}
+RuntimeDyldImpl::~RuntimeDyldImpl() {}
+
+namespace llvm {
+
+// Resolve the relocations for all symbols we currently know about.
+void RuntimeDyldImpl::resolveRelocations() {
+ // First, resolve relocations associated with external symbols.
+ resolveExternalSymbols();
+
+ // Just iterate over the sections we have and resolve all the relocations
+ // in them. Gross overkill, but it gets the job done.
+ for (int i = 0, e = Sections.size(); i != e; ++i) {
+ uint64_t Addr = Sections[i].LoadAddress;
+ DEBUG(dbgs() << "Resolving relocations Section #" << i
+ << "\t" << format("%p", (uint8_t *)Addr)
+ << "\n");
+ resolveRelocationList(Relocations[i], Addr);
+ }
+}
+
+void RuntimeDyldImpl::mapSectionAddress(const void *LocalAddress,
+ uint64_t TargetAddress) {
+ for (unsigned i = 0, e = Sections.size(); i != e; ++i) {
+ if (Sections[i].Address == LocalAddress) {
+ reassignSectionAddress(i, TargetAddress);
+ return;
+ }
+ }
+ llvm_unreachable("Attempting to remap address of unknown section!");
+}
+
+// Subclasses can implement this method to create specialized image instances.
+// The caller owns the pointer that is returned.
+ObjectImage *RuntimeDyldImpl::createObjectImage(ObjectBuffer *InputBuffer) {
+ return new ObjectImageCommon(InputBuffer);
+}
+
+ObjectImage *RuntimeDyldImpl::loadObject(ObjectBuffer *InputBuffer) {
+ OwningPtr<ObjectImage> obj(createObjectImage(InputBuffer));
+ if (!obj)
+ report_fatal_error("Unable to create object image from memory buffer!");
+
+ Arch = (Triple::ArchType)obj->getArch();
+
+ // Symbols found in this object
+ StringMap<SymbolLoc> LocalSymbols;
+ // Used sections from the object file
+ ObjSectionToIDMap LocalSections;
+
+ // Common symbols requiring allocation, with their sizes and alignments
+ CommonSymbolMap CommonSymbols;
+ // Maximum required total memory to allocate all common symbols
+ uint64_t CommonSize = 0;
+
+ error_code err;
+ // Parse symbols
+ DEBUG(dbgs() << "Parse symbols:\n");
+ for (symbol_iterator i = obj->begin_symbols(), e = obj->end_symbols();
+ i != e; i.increment(err)) {
+ Check(err);
+ object::SymbolRef::Type SymType;
+ StringRef Name;
+ Check(i->getType(SymType));
+ Check(i->getName(Name));
+
+ uint32_t flags;
+ Check(i->getFlags(flags));
+
+ bool isCommon = flags & SymbolRef::SF_Common;
+ if (isCommon) {
+ // Add the common symbols to a list. We'll allocate them all below.
+ uint64_t Align = getCommonSymbolAlignment(*i);
+ uint64_t Size = 0;
+ Check(i->getSize(Size));
+ CommonSize += Size + Align;
+ CommonSymbols[*i] = CommonSymbolInfo(Size, Align);
+ } else {
+ if (SymType == object::SymbolRef::ST_Function ||
+ SymType == object::SymbolRef::ST_Data ||
+ SymType == object::SymbolRef::ST_Unknown) {
+ uint64_t FileOffset;
+ StringRef SectionData;
+ bool IsCode;
+ section_iterator si = obj->end_sections();
+ Check(i->getFileOffset(FileOffset));
+ Check(i->getSection(si));
+ if (si == obj->end_sections()) continue;
+ Check(si->getContents(SectionData));
+ Check(si->isText(IsCode));
+ const uint8_t* SymPtr = (const uint8_t*)InputBuffer->getBufferStart() +
+ (uintptr_t)FileOffset;
+ uintptr_t SectOffset = (uintptr_t)(SymPtr -
+ (const uint8_t*)SectionData.begin());
+ unsigned SectionID = findOrEmitSection(*obj, *si, IsCode, LocalSections);
+ LocalSymbols[Name.data()] = SymbolLoc(SectionID, SectOffset);
+ DEBUG(dbgs() << "\tFileOffset: " << format("%p", (uintptr_t)FileOffset)
+ << " flags: " << flags
+ << " SID: " << SectionID
+ << " Offset: " << format("%p", SectOffset));
+ GlobalSymbolTable[Name] = SymbolLoc(SectionID, SectOffset);
+ }
+ }
+ DEBUG(dbgs() << "\tType: " << SymType << " Name: " << Name << "\n");
+ }
+
+ // Allocate common symbols
+ if (CommonSize != 0)
+ emitCommonSymbols(*obj, CommonSymbols, CommonSize, LocalSymbols);
+
+ // Parse and process relocations
+ DEBUG(dbgs() << "Parse relocations:\n");
+ for (section_iterator si = obj->begin_sections(),
+ se = obj->end_sections(); si != se; si.increment(err)) {
+ Check(err);
+ bool isFirstRelocation = true;
+ unsigned SectionID = 0;
+ StubMap Stubs;
+
+ for (relocation_iterator i = si->begin_relocations(),
+ e = si->end_relocations(); i != e; i.increment(err)) {
+ Check(err);
+
+ // If it's the first relocation in this section, find its SectionID
+ if (isFirstRelocation) {
+ SectionID = findOrEmitSection(*obj, *si, true, LocalSections);
+ DEBUG(dbgs() << "\tSectionID: " << SectionID << "\n");
+ isFirstRelocation = false;
+ }
+
+ ObjRelocationInfo RI;
+ RI.SectionID = SectionID;
+ Check(i->getAdditionalInfo(RI.AdditionalInfo));
+ Check(i->getOffset(RI.Offset));
+ Check(i->getSymbol(RI.Symbol));
+ Check(i->getType(RI.Type));
+
+ DEBUG(dbgs() << "\t\tAddend: " << RI.AdditionalInfo
+ << " Offset: " << format("%p", (uintptr_t)RI.Offset)
+ << " Type: " << (uint32_t)(RI.Type & 0xffffffffL)
+ << "\n");
+ processRelocationRef(RI, *obj, LocalSections, LocalSymbols, Stubs);
+ }
+ }
+
+ return obj.take();
+}
+
+void RuntimeDyldImpl::emitCommonSymbols(ObjectImage &Obj,
+ const CommonSymbolMap &CommonSymbols,
+ uint64_t TotalSize,
+ SymbolTableMap &SymbolTable) {
+ // Allocate memory for the section
+ unsigned SectionID = Sections.size();
+ uint8_t *Addr = MemMgr->allocateDataSection(TotalSize, sizeof(void*),
+ SectionID, false);
+ if (!Addr)
+ report_fatal_error("Unable to allocate memory for common symbols!");
+ uint64_t Offset = 0;
+ Sections.push_back(SectionEntry(StringRef(), Addr, TotalSize, TotalSize, 0));
+ memset(Addr, 0, TotalSize);
+
+ DEBUG(dbgs() << "emitCommonSection SectionID: " << SectionID
+ << " new addr: " << format("%p", Addr)
+ << " DataSize: " << TotalSize
+ << "\n");
+
+ // Assign the address of each symbol
+ for (CommonSymbolMap::const_iterator it = CommonSymbols.begin(),
+ itEnd = CommonSymbols.end(); it != itEnd; it++) {
+ uint64_t Size = it->second.first;
+ uint64_t Align = it->second.second;
+ StringRef Name;
+ it->first.getName(Name);
+ if (Align) {
+ // This symbol has an alignment requirement.
+ uint64_t AlignOffset = OffsetToAlignment((uint64_t)Addr, Align);
+ Addr += AlignOffset;
+ Offset += AlignOffset;
+ DEBUG(dbgs() << "Allocating common symbol " << Name << " address " <<
+ format("%p\n", Addr));
+ }
+ Obj.updateSymbolAddress(it->first, (uint64_t)Addr);
+ SymbolTable[Name.data()] = SymbolLoc(SectionID, Offset);
+ Offset += Size;
+ Addr += Size;
+ }
+}
+
+unsigned RuntimeDyldImpl::emitSection(ObjectImage &Obj,
+ const SectionRef &Section,
+ bool IsCode) {
+
+ unsigned StubBufSize = 0,
+ StubSize = getMaxStubSize();
+ error_code err;
+ if (StubSize > 0) {
+ for (relocation_iterator i = Section.begin_relocations(),
+ e = Section.end_relocations(); i != e; i.increment(err), Check(err))
+ StubBufSize += StubSize;
+ }
+ StringRef data;
+ uint64_t Alignment64;
+ Check(Section.getContents(data));
+ Check(Section.getAlignment(Alignment64));
+
+ unsigned Alignment = (unsigned)Alignment64 & 0xffffffffL;
+ bool IsRequired;
+ bool IsVirtual;
+ bool IsZeroInit;
+ bool IsReadOnly;
+ uint64_t DataSize;
+ StringRef Name;
+ Check(Section.isRequiredForExecution(IsRequired));
+ Check(Section.isVirtual(IsVirtual));
+ Check(Section.isZeroInit(IsZeroInit));
+ Check(Section.isReadOnlyData(IsReadOnly));
+ Check(Section.getSize(DataSize));
+ Check(Section.getName(Name));
+
+ unsigned Allocate;
+ unsigned SectionID = Sections.size();
+ uint8_t *Addr;
+ const char *pData = 0;
+
+ // Some sections, such as debug info, don't need to be loaded for execution.
+ // Leave those where they are.
+ if (IsRequired) {
+ Allocate = DataSize + StubBufSize;
+ Addr = IsCode
+ ? MemMgr->allocateCodeSection(Allocate, Alignment, SectionID)
+ : MemMgr->allocateDataSection(Allocate, Alignment, SectionID, IsReadOnly);
+ if (!Addr)
+ report_fatal_error("Unable to allocate section memory!");
+
+ // Virtual sections have no data in the object image, so leave pData = 0
+ if (!IsVirtual)
+ pData = data.data();
+
+ // Zero-initialize or copy the data from the image
+ if (IsZeroInit || IsVirtual)
+ memset(Addr, 0, DataSize);
+ else
+ memcpy(Addr, pData, DataSize);
+
+ DEBUG(dbgs() << "emitSection SectionID: " << SectionID
+ << " Name: " << Name
+ << " obj addr: " << format("%p", pData)
+ << " new addr: " << format("%p", Addr)
+ << " DataSize: " << DataSize
+ << " StubBufSize: " << StubBufSize
+ << " Allocate: " << Allocate
+ << "\n");
+ Obj.updateSectionAddress(Section, (uint64_t)Addr);
+ }
+ else {
+ // Even if we didn't load the section, we need to record an entry for it
+ // to handle later processing (and by 'handle' I mean don't do anything
+ // with these sections).
+ Allocate = 0;
+ Addr = 0;
+ DEBUG(dbgs() << "emitSection SectionID: " << SectionID
+ << " Name: " << Name
+ << " obj addr: " << format("%p", data.data())
+ << " new addr: 0"
+ << " DataSize: " << DataSize
+ << " StubBufSize: " << StubBufSize
+ << " Allocate: " << Allocate
+ << "\n");
+ }
+
+ Sections.push_back(SectionEntry(Name, Addr, Allocate, DataSize,
+ (uintptr_t)pData));
+ return SectionID;
+}
+
+unsigned RuntimeDyldImpl::findOrEmitSection(ObjectImage &Obj,
+ const SectionRef &Section,
+ bool IsCode,
+ ObjSectionToIDMap &LocalSections) {
+
+ unsigned SectionID = 0;
+ ObjSectionToIDMap::iterator i = LocalSections.find(Section);
+ if (i != LocalSections.end())
+ SectionID = i->second;
+ else {
+ SectionID = emitSection(Obj, Section, IsCode);
+ LocalSections[Section] = SectionID;
+ }
+ return SectionID;
+}
+
+void RuntimeDyldImpl::addRelocationForSection(const RelocationEntry &RE,
+ unsigned SectionID) {
+ Relocations[SectionID].push_back(RE);
+}
+
+void RuntimeDyldImpl::addRelocationForSymbol(const RelocationEntry &RE,
+ StringRef SymbolName) {
+ // Relocation by symbol. If the symbol is found in the global symbol table,
+ // create an appropriate section relocation. Otherwise, add it to
+ // ExternalSymbolRelocations.
+ SymbolTableMap::const_iterator Loc =
+ GlobalSymbolTable.find(SymbolName);
+ if (Loc == GlobalSymbolTable.end()) {
+ ExternalSymbolRelocations[SymbolName].push_back(RE);
+ } else {
+ // Copy the RE since we want to modify its addend.
+ RelocationEntry RECopy = RE;
+ RECopy.Addend += Loc->second.second;
+ Relocations[Loc->second.first].push_back(RECopy);
+ }
+}
+
+uint8_t *RuntimeDyldImpl::createStubFunction(uint8_t *Addr) {
+ if (Arch == Triple::arm) {
+ // TODO: There is only ARM far stub now. We should add the Thumb stub,
+ // and stubs for branches Thumb - ARM and ARM - Thumb.
+ uint32_t *StubAddr = (uint32_t*)Addr;
+ *StubAddr = 0xe51ff004; // ldr pc,<label>
+ return (uint8_t*)++StubAddr;
+ } else if (Arch == Triple::mipsel || Arch == Triple::mips) {
+ uint32_t *StubAddr = (uint32_t*)Addr;
+ // 0: 3c190000 lui t9,%hi(addr).
+ // 4: 27390000 addiu t9,t9,%lo(addr).
+ // 8: 03200008 jr t9.
+ // c: 00000000 nop.
+ const unsigned LuiT9Instr = 0x3c190000, AdduiT9Instr = 0x27390000;
+ const unsigned JrT9Instr = 0x03200008, NopInstr = 0x0;
+
+ *StubAddr = LuiT9Instr;
+ StubAddr++;
+ *StubAddr = AdduiT9Instr;
+ StubAddr++;
+ *StubAddr = JrT9Instr;
+ StubAddr++;
+ *StubAddr = NopInstr;
+ return Addr;
+ } else if (Arch == Triple::ppc64) {
+ // PowerPC64 stub: the address points to a function descriptor
+ // instead of the function itself. Load the function address
+ // on r11 and sets it to control register. Also loads the function
+ // TOC in r2 and environment pointer to r11.
+ writeInt32BE(Addr, 0x3D800000); // lis r12, highest(addr)
+ writeInt32BE(Addr+4, 0x618C0000); // ori r12, higher(addr)
+ writeInt32BE(Addr+8, 0x798C07C6); // sldi r12, r12, 32
+ writeInt32BE(Addr+12, 0x658C0000); // oris r12, r12, h(addr)
+ writeInt32BE(Addr+16, 0x618C0000); // ori r12, r12, l(addr)
+ writeInt32BE(Addr+20, 0xF8410028); // std r2, 40(r1)
+ writeInt32BE(Addr+24, 0xE96C0000); // ld r11, 0(r12)
+ writeInt32BE(Addr+28, 0xE84C0008); // ld r2, 0(r12)
+ writeInt32BE(Addr+32, 0x7D6903A6); // mtctr r11
+ writeInt32BE(Addr+36, 0xE96C0010); // ld r11, 16(r2)
+ writeInt32BE(Addr+40, 0x4E800420); // bctr
+
+ return Addr;
+ }
+ return Addr;
+}
+
+// Assign an address to a symbol name and resolve all the relocations
+// associated with it.
+void RuntimeDyldImpl::reassignSectionAddress(unsigned SectionID,
+ uint64_t Addr) {
+ // The address to use for relocation resolution is not
+ // the address of the local section buffer. We must be doing
+ // a remote execution environment of some sort. Relocations can't
+ // be applied until all the sections have been moved. The client must
+ // trigger this with a call to MCJIT::finalize() or
+ // RuntimeDyld::resolveRelocations().
+ //
+ // Addr is a uint64_t because we can't assume the pointer width
+ // of the target is the same as that of the host. Just use a generic
+ // "big enough" type.
+ Sections[SectionID].LoadAddress = Addr;
+}
+
+void RuntimeDyldImpl::resolveRelocationEntry(const RelocationEntry &RE,
+ uint64_t Value) {
+ // Ignore relocations for sections that were not loaded
+ if (Sections[RE.SectionID].Address != 0) {
+ DEBUG(dbgs() << "\tSectionID: " << RE.SectionID
+ << " + " << RE.Offset << " ("
+ << format("%p", Sections[RE.SectionID].Address + RE.Offset) << ")"
+ << " RelType: " << RE.RelType
+ << " Addend: " << RE.Addend
+ << "\n");
+
+ resolveRelocation(Sections[RE.SectionID], RE.Offset,
+ Value, RE.RelType, RE.Addend);
+ }
+}
+
+void RuntimeDyldImpl::resolveRelocationList(const RelocationList &Relocs,
+ uint64_t Value) {
+ for (unsigned i = 0, e = Relocs.size(); i != e; ++i) {
+ resolveRelocationEntry(Relocs[i], Value);
+ }
+}
+
+void RuntimeDyldImpl::resolveExternalSymbols() {
+ StringMap<RelocationList>::iterator i = ExternalSymbolRelocations.begin(),
+ e = ExternalSymbolRelocations.end();
+ for (; i != e; i++) {
+ StringRef Name = i->first();
+ RelocationList &Relocs = i->second;
+ SymbolTableMap::const_iterator Loc = GlobalSymbolTable.find(Name);
+ if (Loc == GlobalSymbolTable.end()) {
+ if (Name.size() == 0) {
+ // This is an absolute symbol, use an address of zero.
+ DEBUG(dbgs() << "Resolving absolute relocations." << "\n");
+ resolveRelocationList(Relocs, 0);
+ } else {
+ // This is an external symbol, try to get its address from
+ // MemoryManager.
+ uint8_t *Addr = (uint8_t*) MemMgr->getPointerToNamedFunction(Name.data(),
+ true);
+ DEBUG(dbgs() << "Resolving relocations Name: " << Name
+ << "\t" << format("%p", Addr)
+ << "\n");
+ resolveRelocationList(Relocs, (uintptr_t)Addr);
+ }
+ } else {
+ report_fatal_error("Expected external symbol");
+ }
+ }
+}
+
+
+//===----------------------------------------------------------------------===//
+// RuntimeDyld class implementation
+RuntimeDyld::RuntimeDyld(RTDyldMemoryManager *mm) {
+ // FIXME: There's a potential issue lurking here if a single instance of
+ // RuntimeDyld is used to load multiple objects. The current implementation
+ // associates a single memory manager with a RuntimeDyld instance. Even
+ // though the public class spawns a new 'impl' instance for each load,
+ // they share a single memory manager. This can become a problem when page
+ // permissions are applied.
+ Dyld = 0;
+ MM = mm;
+}
+
+RuntimeDyld::~RuntimeDyld() {
+ delete Dyld;
+}
+
+ObjectImage *RuntimeDyld::loadObject(ObjectBuffer *InputBuffer) {
+ if (!Dyld) {
+ sys::LLVMFileType type = sys::IdentifyFileType(
+ InputBuffer->getBufferStart(),
+ static_cast<unsigned>(InputBuffer->getBufferSize()));
+ switch (type) {
+ case sys::ELF_Relocatable_FileType:
+ case sys::ELF_Executable_FileType:
+ case sys::ELF_SharedObject_FileType:
+ case sys::ELF_Core_FileType:
+ Dyld = new RuntimeDyldELF(MM);
+ break;
+ case sys::Mach_O_Object_FileType:
+ case sys::Mach_O_Executable_FileType:
+ case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
+ case sys::Mach_O_Core_FileType:
+ case sys::Mach_O_PreloadExecutable_FileType:
+ case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
+ case sys::Mach_O_DynamicLinker_FileType:
+ case sys::Mach_O_Bundle_FileType:
+ case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
+ case sys::Mach_O_DSYMCompanion_FileType:
+ Dyld = new RuntimeDyldMachO(MM);
+ break;
+ case sys::Unknown_FileType:
+ case sys::Bitcode_FileType:
+ case sys::Archive_FileType:
+ case sys::COFF_FileType:
+ report_fatal_error("Incompatible object format!");
+ }
+ } else {
+ if (!Dyld->isCompatibleFormat(InputBuffer))
+ report_fatal_error("Incompatible object format!");
+ }
+
+ return Dyld->loadObject(InputBuffer);
+}
+
+void *RuntimeDyld::getSymbolAddress(StringRef Name) {
+ return Dyld->getSymbolAddress(Name);
+}
+
+uint64_t RuntimeDyld::getSymbolLoadAddress(StringRef Name) {
+ return Dyld->getSymbolLoadAddress(Name);
+}
+
+void RuntimeDyld::resolveRelocations() {
+ Dyld->resolveRelocations();
+}
+
+void RuntimeDyld::reassignSectionAddress(unsigned SectionID,
+ uint64_t Addr) {
+ Dyld->reassignSectionAddress(SectionID, Addr);
+}
+
+void RuntimeDyld::mapSectionAddress(const void *LocalAddress,
+ uint64_t TargetAddress) {
+ Dyld->mapSectionAddress(LocalAddress, TargetAddress);
+}
+
+StringRef RuntimeDyld::getErrorString() {
+ return Dyld->getErrorString();
+}
+
+} // end namespace llvm
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