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-rw-r--r--lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp13
-rw-r--r--lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h21
-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp97
-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp107
-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h8
-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h27
-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp483
-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h60
8 files changed, 567 insertions, 249 deletions
diff --git a/lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp b/lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp
index 1d0e9b3..8546571 100644
--- a/lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp
@@ -45,7 +45,7 @@ extern "C" {
// We put information about the JITed function in this global, which the
// debugger reads. Make sure to specify the version statically, because the
// debugger checks the version before we can set it during runtime.
- struct jit_descriptor __jit_debug_descriptor = { 1, 0, 0, 0 };
+ struct jit_descriptor __jit_debug_descriptor = { 1, 0, nullptr, nullptr };
// Debuggers puts a breakpoint in this function.
LLVM_ATTRIBUTE_NOINLINE void __jit_debug_register_code() {
@@ -108,10 +108,10 @@ void NotifyDebugger(jit_code_entry* JITCodeEntry) {
__jit_debug_descriptor.action_flag = JIT_REGISTER_FN;
// Insert this entry at the head of the list.
- JITCodeEntry->prev_entry = NULL;
+ JITCodeEntry->prev_entry = nullptr;
jit_code_entry* NextEntry = __jit_debug_descriptor.first_entry;
JITCodeEntry->next_entry = NextEntry;
- if (NextEntry != NULL) {
+ if (NextEntry) {
NextEntry->prev_entry = JITCodeEntry;
}
__jit_debug_descriptor.first_entry = JITCodeEntry;
@@ -142,11 +142,10 @@ void GDBJITRegistrar::registerObject(const ObjectBuffer &Object) {
"Second attempt to perform debug registration.");
jit_code_entry* JITCodeEntry = new jit_code_entry();
- if (JITCodeEntry == 0) {
+ if (!JITCodeEntry) {
llvm::report_fatal_error(
"Allocation failed when registering a JIT entry!\n");
- }
- else {
+ } else {
JITCodeEntry->symfile_addr = Buffer;
JITCodeEntry->symfile_size = Size;
@@ -198,7 +197,7 @@ void GDBJITRegistrar::deregisterObjectInternal(
}
delete JITCodeEntry;
- JITCodeEntry = NULL;
+ JITCodeEntry = nullptr;
}
llvm::ManagedStatic<GDBJITRegistrar> TheRegistrar;
diff --git a/lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h b/lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h
index 3693c69..4917b93 100644
--- a/lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h
+++ b/lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h
@@ -18,6 +18,8 @@
#include "llvm/ExecutionEngine/ObjectImage.h"
#include "llvm/Object/ObjectFile.h"
+#include <memory>
+
namespace llvm {
namespace object {
@@ -30,13 +32,13 @@ class ObjectImageCommon : public ObjectImage {
void anchor() override;
protected:
- object::ObjectFile *ObjFile;
+ std::unique_ptr<object::ObjectFile> ObjFile;
// This form of the constructor allows subclasses to use
// format-specific subclasses of ObjectFile directly
- ObjectImageCommon(ObjectBuffer *Input, object::ObjectFile *Obj)
+ ObjectImageCommon(ObjectBuffer *Input, std::unique_ptr<object::ObjectFile> Obj)
: ObjectImage(Input), // saves Input as Buffer and takes ownership
- ObjFile(Obj)
+ ObjFile(std::move(Obj))
{
}
@@ -44,12 +46,13 @@ public:
ObjectImageCommon(ObjectBuffer* Input)
: ObjectImage(Input) // saves Input as Buffer and takes ownership
{
- ObjFile =
- object::ObjectFile::createObjectFile(Buffer->getMemBuffer()).get();
+ // FIXME: error checking? createObjectFile returns an ErrorOr<ObjectFile*>
+ // and should probably be checked for failure.
+ ObjFile.reset(object::ObjectFile::createObjectFile(Buffer->getMemBuffer()).get());
}
- ObjectImageCommon(object::ObjectFile* Input)
- : ObjectImage(NULL), ObjFile(Input) {}
- virtual ~ObjectImageCommon() { delete ObjFile; }
+ ObjectImageCommon(std::unique_ptr<object::ObjectFile> Input)
+ : ObjectImage(nullptr), ObjFile(std::move(Input)) {}
+ virtual ~ObjectImageCommon() { }
object::symbol_iterator begin_symbols() const override
{ return ObjFile->symbol_begin(); }
@@ -66,7 +69,7 @@ public:
StringRef getData() const override { return ObjFile->getData(); }
- object::ObjectFile* getObjectFile() const override { return ObjFile; }
+ object::ObjectFile* getObjectFile() const override { return ObjFile.get(); }
// Subclasses can override these methods to update the image with loaded
// addresses for sections and common symbols
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
index 986d3a0..c1eb0fd 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
@@ -11,7 +11,6 @@
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "dyld"
#include "llvm/ExecutionEngine/RuntimeDyld.h"
#include "JITRegistrar.h"
#include "ObjectImageCommon.h"
@@ -25,6 +24,8 @@
using namespace llvm;
using namespace llvm::object;
+#define DEBUG_TYPE "dyld"
+
// Empty out-of-line virtual destructor as the key function.
RuntimeDyldImpl::~RuntimeDyldImpl() {}
@@ -72,12 +73,40 @@ void RuntimeDyldImpl::mapSectionAddress(const void *LocalAddress,
llvm_unreachable("Attempting to remap address of unknown section!");
}
+static error_code getOffset(const SymbolRef &Sym, uint64_t &Result) {
+ uint64_t Address;
+ if (error_code EC = Sym.getAddress(Address))
+ return EC;
+
+ if (Address == UnknownAddressOrSize) {
+ Result = UnknownAddressOrSize;
+ return object_error::success;
+ }
+
+ const ObjectFile *Obj = Sym.getObject();
+ section_iterator SecI(Obj->section_begin());
+ if (error_code EC = Sym.getSection(SecI))
+ return EC;
+
+ if (SecI == Obj->section_end()) {
+ Result = UnknownAddressOrSize;
+ return object_error::success;
+ }
+
+ uint64_t SectionAddress;
+ if (error_code EC = SecI->getAddress(SectionAddress))
+ return EC;
+
+ Result = Address - SectionAddress;
+ return object_error::success;
+}
+
ObjectImage *RuntimeDyldImpl::loadObject(ObjectImage *InputObject) {
MutexGuard locked(lock);
std::unique_ptr<ObjectImage> Obj(InputObject);
if (!Obj)
- return NULL;
+ return nullptr;
// Save information about our target
Arch = (Triple::ArchType)Obj->getArch();
@@ -115,36 +144,33 @@ ObjectImage *RuntimeDyldImpl::loadObject(ObjectImage *InputObject) {
bool IsCommon = Flags & SymbolRef::SF_Common;
if (IsCommon) {
// Add the common symbols to a list. We'll allocate them all below.
- uint32_t Align;
- Check(I->getAlignment(Align));
- uint64_t Size = 0;
- Check(I->getSize(Size));
- CommonSize += Size + Align;
- CommonSymbols[*I] = CommonSymbolInfo(Size, Align);
+ if (!GlobalSymbolTable.count(Name)) {
+ uint32_t Align;
+ Check(I->getAlignment(Align));
+ 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;
+ uint64_t SectOffset;
StringRef SectionData;
bool IsCode;
section_iterator SI = Obj->end_sections();
- Check(I->getFileOffset(FileOffset));
+ Check(getOffset(*I, SectOffset));
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 *)Obj->getData().data() + (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));
+ DEBUG(dbgs() << "\tOffset: " << format("%p", (uintptr_t)SectOffset)
+ << " flags: " << Flags << " SID: " << SectionID);
GlobalSymbolTable[Name] = SymbolLoc(SectionID, SectOffset);
}
}
@@ -153,7 +179,7 @@ ObjectImage *RuntimeDyldImpl::loadObject(ObjectImage *InputObject) {
// Allocate common symbols
if (CommonSize != 0)
- emitCommonSymbols(*Obj, CommonSymbols, CommonSize, LocalSymbols);
+ emitCommonSymbols(*Obj, CommonSymbols, CommonSize, GlobalSymbolTable);
// Parse and process relocations
DEBUG(dbgs() << "Parse relocations:\n");
@@ -163,7 +189,10 @@ ObjectImage *RuntimeDyldImpl::loadObject(ObjectImage *InputObject) {
StubMap Stubs;
section_iterator RelocatedSection = SI->getRelocatedSection();
- if (SI->relocation_empty() && !ProcessAllSections)
+ relocation_iterator I = SI->relocation_begin();
+ relocation_iterator E = SI->relocation_end();
+
+ if (I == E && !ProcessAllSections)
continue;
bool IsCode = false;
@@ -172,14 +201,13 @@ ObjectImage *RuntimeDyldImpl::loadObject(ObjectImage *InputObject) {
findOrEmitSection(*Obj, *RelocatedSection, IsCode, LocalSections);
DEBUG(dbgs() << "\tSectionID: " << SectionID << "\n");
- for (relocation_iterator I = SI->relocation_begin(),
- E = SI->relocation_end(); I != E;)
+ for (; I != E;)
I = processRelocationRef(SectionID, I, *Obj, LocalSections, LocalSymbols,
Stubs);
}
// Give the subclasses a chance to tie-up any loose ends.
- finalizeLoad(LocalSections);
+ finalizeLoad(*Obj, LocalSections);
return Obj.release();
}
@@ -400,7 +428,7 @@ unsigned RuntimeDyldImpl::emitSection(ObjectImage &Obj,
uintptr_t Allocate;
unsigned SectionID = Sections.size();
uint8_t *Addr;
- const char *pData = 0;
+ const char *pData = nullptr;
// Some sections, such as debug info, don't need to be loaded for execution.
// Leave those where they are.
@@ -441,7 +469,7 @@ unsigned RuntimeDyldImpl::emitSection(ObjectImage &Obj,
// to handle later processing (and by 'handle' I mean don't do anything
// with these sections).
Allocate = 0;
- Addr = 0;
+ Addr = nullptr;
DEBUG(dbgs() << "emitSection SectionID: " << SectionID << " Name: " << Name
<< " obj addr: " << format("%p", data.data()) << " new addr: 0"
<< " DataSize: " << DataSize << " StubBufSize: " << StubBufSize
@@ -490,7 +518,8 @@ void RuntimeDyldImpl::addRelocationForSymbol(const RelocationEntry &RE,
}
uint8_t *RuntimeDyldImpl::createStubFunction(uint8_t *Addr) {
- if (Arch == Triple::aarch64 || Arch == Triple::aarch64_be) {
+ if (Arch == Triple::aarch64 || Arch == Triple::aarch64_be ||
+ Arch == Triple::arm64 || Arch == Triple::arm64_be) {
// This stub has to be able to access the full address space,
// since symbol lookup won't necessarily find a handy, in-range,
// PLT stub for functions which could be anywhere.
@@ -560,6 +589,8 @@ uint8_t *RuntimeDyldImpl::createStubFunction(uint8_t *Addr) {
*Addr = 0xFF; // jmp
*(Addr+1) = 0x25; // rip
// 32-bit PC-relative address of the GOT entry will be stored at Addr+2
+ } else if (Arch == Triple::x86) {
+ *Addr = 0xE9; // 32-bit pc-relative jump.
}
return Addr;
}
@@ -586,7 +617,7 @@ void RuntimeDyldImpl::resolveRelocationList(const RelocationList &Relocs,
for (unsigned i = 0, e = Relocs.size(); i != e; ++i) {
const RelocationEntry &RE = Relocs[i];
// Ignore relocations for sections that were not loaded
- if (Sections[RE.SectionID].Address == 0)
+ if (Sections[RE.SectionID].Address == nullptr)
continue;
resolveRelocation(RE, Value);
}
@@ -651,7 +682,7 @@ RuntimeDyld::RuntimeDyld(RTDyldMemoryManager *mm) {
// 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;
+ Dyld = nullptr;
MM = mm;
ProcessAllSections = false;
}
@@ -672,21 +703,23 @@ createRuntimeDyldMachO(RTDyldMemoryManager *MM, bool ProcessAllSections) {
return Dyld;
}
-ObjectImage *RuntimeDyld::loadObject(ObjectFile *InputObject) {
+ObjectImage *RuntimeDyld::loadObject(std::unique_ptr<ObjectFile> InputObject) {
std::unique_ptr<ObjectImage> InputImage;
+ ObjectFile &Obj = *InputObject;
+
if (InputObject->isELF()) {
- InputImage.reset(RuntimeDyldELF::createObjectImageFromFile(InputObject));
+ InputImage.reset(RuntimeDyldELF::createObjectImageFromFile(std::move(InputObject)));
if (!Dyld)
Dyld = createRuntimeDyldELF(MM, ProcessAllSections).release();
} else if (InputObject->isMachO()) {
- InputImage.reset(RuntimeDyldMachO::createObjectImageFromFile(InputObject));
+ InputImage.reset(RuntimeDyldMachO::createObjectImageFromFile(std::move(InputObject)));
if (!Dyld)
Dyld = createRuntimeDyldMachO(MM, ProcessAllSections).release();
} else
report_fatal_error("Incompatible object format!");
- if (!Dyld->isCompatibleFile(InputObject))
+ if (!Dyld->isCompatibleFile(&Obj))
report_fatal_error("Incompatible object format!");
Dyld->loadObject(InputImage.get());
@@ -740,7 +773,7 @@ ObjectImage *RuntimeDyld::loadObject(ObjectBuffer *InputBuffer) {
void *RuntimeDyld::getSymbolAddress(StringRef Name) {
if (!Dyld)
- return NULL;
+ return nullptr;
return Dyld->getSymbolAddress(Name);
}
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
index 3204b81..6ba24b9 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
@@ -11,7 +11,6 @@
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "dyld"
#include "RuntimeDyldELF.h"
#include "JITRegistrar.h"
#include "ObjectImageCommon.h"
@@ -29,6 +28,8 @@
using namespace llvm;
using namespace llvm::object;
+#define DEBUG_TYPE "dyld"
+
namespace {
static inline error_code check(error_code Err) {
@@ -50,7 +51,12 @@ template <class ELFT> class DyldELFObject : public ELFObjectFile<ELFT> {
typedef typename ELFDataTypeTypedefHelper<ELFT>::value_type addr_type;
+ std::unique_ptr<ObjectFile> UnderlyingFile;
+
public:
+ DyldELFObject(std::unique_ptr<ObjectFile> UnderlyingFile,
+ MemoryBuffer *Wrapper, error_code &ec);
+
DyldELFObject(MemoryBuffer *Wrapper, error_code &ec);
void updateSectionAddress(const SectionRef &Sec, uint64_t Addr);
@@ -67,13 +73,11 @@ public:
};
template <class ELFT> class ELFObjectImage : public ObjectImageCommon {
-protected:
- DyldELFObject<ELFT> *DyldObj;
bool Registered;
public:
- ELFObjectImage(ObjectBuffer *Input, DyldELFObject<ELFT> *Obj)
- : ObjectImageCommon(Input, Obj), DyldObj(Obj), Registered(false) {}
+ ELFObjectImage(ObjectBuffer *Input, std::unique_ptr<DyldELFObject<ELFT>> Obj)
+ : ObjectImageCommon(Input, std::move(Obj)), Registered(false) {}
virtual ~ELFObjectImage() {
if (Registered)
@@ -83,11 +87,13 @@ public:
// Subclasses can override these methods to update the image with loaded
// addresses for sections and common symbols
void updateSectionAddress(const SectionRef &Sec, uint64_t Addr) override {
- DyldObj->updateSectionAddress(Sec, Addr);
+ static_cast<DyldELFObject<ELFT>*>(getObjectFile())
+ ->updateSectionAddress(Sec, Addr);
}
void updateSymbolAddress(const SymbolRef &Sym, uint64_t Addr) override {
- DyldObj->updateSymbolAddress(Sym, Addr);
+ static_cast<DyldELFObject<ELFT>*>(getObjectFile())
+ ->updateSymbolAddress(Sym, Addr);
}
void registerWithDebugger() override {
@@ -109,6 +115,14 @@ DyldELFObject<ELFT>::DyldELFObject(MemoryBuffer *Wrapper, error_code &ec)
}
template <class ELFT>
+DyldELFObject<ELFT>::DyldELFObject(std::unique_ptr<ObjectFile> UnderlyingFile,
+ MemoryBuffer *Wrapper, error_code &ec)
+ : ELFObjectFile<ELFT>(Wrapper, ec),
+ UnderlyingFile(std::move(UnderlyingFile)) {
+ this->isDyldELFObject = true;
+}
+
+template <class ELFT>
void DyldELFObject<ELFT>::updateSectionAddress(const SectionRef &Sec,
uint64_t Addr) {
DataRefImpl ShdrRef = Sec.getRawDataRefImpl();
@@ -164,30 +178,36 @@ void RuntimeDyldELF::deregisterEHFrames() {
}
ObjectImage *
-RuntimeDyldELF::createObjectImageFromFile(object::ObjectFile *ObjFile) {
+RuntimeDyldELF::createObjectImageFromFile(std::unique_ptr<object::ObjectFile> ObjFile) {
if (!ObjFile)
- return NULL;
+ return nullptr;
error_code ec;
MemoryBuffer *Buffer =
MemoryBuffer::getMemBuffer(ObjFile->getData(), "", false);
if (ObjFile->getBytesInAddress() == 4 && ObjFile->isLittleEndian()) {
- DyldELFObject<ELFType<support::little, 2, false>> *Obj =
- new DyldELFObject<ELFType<support::little, 2, false>>(Buffer, ec);
- return new ELFObjectImage<ELFType<support::little, 2, false>>(NULL, Obj);
+ auto Obj =
+ llvm::make_unique<DyldELFObject<ELFType<support::little, 2, false>>>(
+ std::move(ObjFile), Buffer, ec);
+ return new ELFObjectImage<ELFType<support::little, 2, false>>(
+ nullptr, std::move(Obj));
} else if (ObjFile->getBytesInAddress() == 4 && !ObjFile->isLittleEndian()) {
- DyldELFObject<ELFType<support::big, 2, false>> *Obj =
- new DyldELFObject<ELFType<support::big, 2, false>>(Buffer, ec);
- return new ELFObjectImage<ELFType<support::big, 2, false>>(NULL, Obj);
+ auto Obj =
+ llvm::make_unique<DyldELFObject<ELFType<support::big, 2, false>>>(
+ std::move(ObjFile), Buffer, ec);
+ return new ELFObjectImage<ELFType<support::big, 2, false>>(nullptr, std::move(Obj));
} else if (ObjFile->getBytesInAddress() == 8 && !ObjFile->isLittleEndian()) {
- DyldELFObject<ELFType<support::big, 2, true>> *Obj =
- new DyldELFObject<ELFType<support::big, 2, true>>(Buffer, ec);
- return new ELFObjectImage<ELFType<support::big, 2, true>>(NULL, Obj);
+ auto Obj = llvm::make_unique<DyldELFObject<ELFType<support::big, 2, true>>>(
+ std::move(ObjFile), Buffer, ec);
+ return new ELFObjectImage<ELFType<support::big, 2, true>>(nullptr,
+ std::move(Obj));
} else if (ObjFile->getBytesInAddress() == 8 && ObjFile->isLittleEndian()) {
- DyldELFObject<ELFType<support::little, 2, true>> *Obj =
- new DyldELFObject<ELFType<support::little, 2, true>>(Buffer, ec);
- return new ELFObjectImage<ELFType<support::little, 2, true>>(NULL, Obj);
+ auto Obj =
+ llvm::make_unique<DyldELFObject<ELFType<support::little, 2, true>>>(
+ std::move(ObjFile), Buffer, ec);
+ return new ELFObjectImage<ELFType<support::little, 2, true>>(
+ nullptr, std::move(Obj));
} else
llvm_unreachable("Unexpected ELF format");
}
@@ -201,28 +221,29 @@ ObjectImage *RuntimeDyldELF::createObjectImage(ObjectBuffer *Buffer) {
error_code ec;
if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB) {
- DyldELFObject<ELFType<support::little, 4, false>> *Obj =
- new DyldELFObject<ELFType<support::little, 4, false>>(
+ auto Obj =
+ llvm::make_unique<DyldELFObject<ELFType<support::little, 4, false>>>(
Buffer->getMemBuffer(), ec);
- return new ELFObjectImage<ELFType<support::little, 4, false>>(Buffer, Obj);
+ return new ELFObjectImage<ELFType<support::little, 4, false>>(
+ Buffer, std::move(Obj));
} else if (Ident.first == ELF::ELFCLASS32 &&
Ident.second == ELF::ELFDATA2MSB) {
- DyldELFObject<ELFType<support::big, 4, false>> *Obj =
- new DyldELFObject<ELFType<support::big, 4, false>>(
+ auto Obj =
+ llvm::make_unique<DyldELFObject<ELFType<support::big, 4, false>>>(
Buffer->getMemBuffer(), ec);
- return new ELFObjectImage<ELFType<support::big, 4, false>>(Buffer, Obj);
+ return new ELFObjectImage<ELFType<support::big, 4, false>>(Buffer,
+ std::move(Obj));
} else if (Ident.first == ELF::ELFCLASS64 &&
Ident.second == ELF::ELFDATA2MSB) {
- DyldELFObject<ELFType<support::big, 8, true>> *Obj =
- new DyldELFObject<ELFType<support::big, 8, true>>(
- Buffer->getMemBuffer(), ec);
- return new ELFObjectImage<ELFType<support::big, 8, true>>(Buffer, Obj);
+ auto Obj = llvm::make_unique<DyldELFObject<ELFType<support::big, 8, true>>>(
+ Buffer->getMemBuffer(), ec);
+ return new ELFObjectImage<ELFType<support::big, 8, true>>(Buffer, std::move(Obj));
} else if (Ident.first == ELF::ELFCLASS64 &&
Ident.second == ELF::ELFDATA2LSB) {
- DyldELFObject<ELFType<support::little, 8, true>> *Obj =
- new DyldELFObject<ELFType<support::little, 8, true>>(
+ auto Obj =
+ llvm::make_unique<DyldELFObject<ELFType<support::little, 8, true>>>(
Buffer->getMemBuffer(), ec);
- return new ELFObjectImage<ELFType<support::little, 8, true>>(Buffer, Obj);
+ return new ELFObjectImage<ELFType<support::little, 8, true>>(Buffer, std::move(Obj));
} else
llvm_unreachable("Unexpected ELF format");
}
@@ -845,6 +866,8 @@ void RuntimeDyldELF::resolveRelocation(const SectionEntry &Section,
break;
case Triple::aarch64:
case Triple::aarch64_be:
+ case Triple::arm64:
+ case Triple::arm64_be:
resolveAArch64Relocation(Section, Offset, Value, Type, Addend);
break;
case Triple::arm: // Fall through.
@@ -950,7 +973,8 @@ relocation_iterator RuntimeDyldELF::processRelocationRef(
DEBUG(dbgs() << "\t\tSectionID: " << SectionID << " Offset: " << Offset
<< "\n");
- if (Arch == Triple::aarch64 &&
+ if ((Arch == Triple::aarch64 || Arch == Triple::aarch64_be ||
+ Arch == Triple::arm64 || Arch == Triple::arm64_be) &&
(RelType == ELF::R_AARCH64_CALL26 || RelType == ELF::R_AARCH64_JUMP26)) {
// This is an AArch64 branch relocation, need to use a stub function.
DEBUG(dbgs() << "\t\tThis is an AArch64 branch relocation.");
@@ -1151,7 +1175,7 @@ relocation_iterator RuntimeDyldELF::processRelocationRef(
// Extra check to avoid relocation againt empty symbols (usually
// the R_PPC64_TOC).
if (SymType != SymbolRef::ST_Unknown && TargetName.empty())
- Value.SymbolName = NULL;
+ Value.SymbolName = nullptr;
if (Value.SymbolName)
addRelocationForSymbol(RE, Value.SymbolName);
@@ -1283,7 +1307,8 @@ void RuntimeDyldELF::updateGOTEntries(StringRef Name, uint64_t Addr) {
for (it = GOTs.begin(); it != end; ++it) {
GOTRelocations &GOTEntries = it->second;
for (int i = 0, e = GOTEntries.size(); i != e; ++i) {
- if (GOTEntries[i].SymbolName != 0 && GOTEntries[i].SymbolName == Name) {
+ if (GOTEntries[i].SymbolName != nullptr &&
+ GOTEntries[i].SymbolName == Name) {
GOTEntries[i].Offset = Addr;
}
}
@@ -1297,6 +1322,9 @@ size_t RuntimeDyldELF::getGOTEntrySize() {
switch (Arch) {
case Triple::x86_64:
case Triple::aarch64:
+ case Triple::aarch64_be:
+ case Triple::arm64:
+ case Triple::arm64_be:
case Triple::ppc64:
case Triple::ppc64le:
case Triple::systemz:
@@ -1331,7 +1359,7 @@ uint64_t RuntimeDyldELF::findGOTEntry(uint64_t LoadAddress, uint64_t Offset) {
// Find the matching entry in our vector.
uint64_t SymbolOffset = 0;
for (int i = 0, e = GOTEntries.size(); i != e; ++i) {
- if (GOTEntries[i].SymbolName == 0) {
+ if (!GOTEntries[i].SymbolName) {
if (getSectionLoadAddress(GOTEntries[i].SectionID) == LoadAddress &&
GOTEntries[i].Offset == Offset) {
GOTIndex = i;
@@ -1369,7 +1397,8 @@ uint64_t RuntimeDyldELF::findGOTEntry(uint64_t LoadAddress, uint64_t Offset) {
return 0;
}
-void RuntimeDyldELF::finalizeLoad(ObjSectionToIDMap &SectionMap) {
+void RuntimeDyldELF::finalizeLoad(ObjectImage &ObjImg,
+ ObjSectionToIDMap &SectionMap) {
// If necessary, allocate the global offset table
if (MemMgr) {
// Allocate the GOT if necessary
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h
index 27db5cd..a526073 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h
@@ -59,7 +59,8 @@ class RuntimeDyldELF : public RuntimeDyldImpl {
uint64_t Value, uint32_t Type, int64_t Addend);
unsigned getMaxStubSize() override {
- if (Arch == Triple::aarch64)
+ if (Arch == Triple::aarch64 || Arch == Triple::arm64 ||
+ Arch == Triple::aarch64_be || Arch == Triple::arm64_be)
return 20; // movz; movk; movk; movk; br
if (Arch == Triple::arm || Arch == Triple::thumb)
return 8; // 32-bit instruction and 32-bit address
@@ -115,11 +116,12 @@ public:
bool isCompatibleFile(const object::ObjectFile *Buffer) const override;
void registerEHFrames() override;
void deregisterEHFrames() override;
- void finalizeLoad(ObjSectionToIDMap &SectionMap) override;
+ void finalizeLoad(ObjectImage &ObjImg,
+ ObjSectionToIDMap &SectionMap) override;
virtual ~RuntimeDyldELF();
static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer);
- static ObjectImage *createObjectImageFromFile(object::ObjectFile *Obj);
+ static ObjectImage *createObjectImageFromFile(std::unique_ptr<object::ObjectFile> Obj);
};
} // end namespace llvm
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index c153ee1..412cf20 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -90,9 +90,17 @@ public:
/// used to make a relocation section relative instead of symbol relative.
int64_t Addend;
+ struct SectionPair {
+ uint32_t SectionA;
+ uint32_t SectionB;
+ };
+
/// SymOffset - Section offset of the relocation entry's symbol (used for GOT
/// lookup).
- uint64_t SymOffset;
+ union {
+ uint64_t SymOffset;
+ SectionPair Sections;
+ };
/// True if this is a PCRel relocation (MachO specific).
bool IsPCRel;
@@ -113,6 +121,16 @@ public:
bool IsPCRel, unsigned Size)
: SectionID(id), Offset(offset), RelType(type), Addend(addend),
SymOffset(0), IsPCRel(IsPCRel), Size(Size) {}
+
+ RelocationEntry(unsigned id, uint64_t offset, uint32_t type, int64_t addend,
+ unsigned SectionA, uint64_t SectionAOffset, unsigned SectionB,
+ uint64_t SectionBOffset, bool IsPCRel, unsigned Size)
+ : SectionID(id), Offset(offset), RelType(type),
+ Addend(SectionAOffset - SectionBOffset + addend), IsPCRel(IsPCRel),
+ Size(Size) {
+ Sections.SectionA = SectionA;
+ Sections.SectionB = SectionB;
+ }
};
class RelocationValueRef {
@@ -121,7 +139,8 @@ public:
uint64_t Offset;
int64_t Addend;
const char *SymbolName;
- RelocationValueRef() : SectionID(0), Offset(0), Addend(0), SymbolName(0) {}
+ RelocationValueRef() : SectionID(0), Offset(0), Addend(0),
+ SymbolName(nullptr) {}
inline bool operator==(const RelocationValueRef &Other) const {
return SectionID == Other.SectionID && Offset == Other.Offset &&
@@ -335,7 +354,7 @@ public:
// Work in progress.
SymbolTableMap::const_iterator pos = GlobalSymbolTable.find(Name);
if (pos == GlobalSymbolTable.end())
- return 0;
+ return nullptr;
SymbolLoc Loc = pos->second;
return getSectionAddress(Loc.first) + Loc.second;
}
@@ -372,7 +391,7 @@ public:
virtual void deregisterEHFrames();
- virtual void finalizeLoad(ObjSectionToIDMap &SectionMap) {}
+ virtual void finalizeLoad(ObjectImage &ObjImg, ObjSectionToIDMap &SectionMap) {}
};
} // end namespace llvm
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
index 7eae9c2..2b425fb 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
@@ -11,17 +11,20 @@
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "dyld"
#include "RuntimeDyldMachO.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
using namespace llvm;
using namespace llvm::object;
+#define DEBUG_TYPE "dyld"
+
namespace llvm {
static unsigned char *processFDE(unsigned char *P, intptr_t DeltaForText,
intptr_t DeltaForEH) {
+ DEBUG(dbgs() << "Processing FDE: Delta for text: " << DeltaForText
+ << ", Delta for EH: " << DeltaForEH << "\n");
uint32_t Length = *((uint32_t *)P);
P += 4;
unsigned char *Ret = P + Length;
@@ -66,7 +69,7 @@ void RuntimeDyldMachO::registerEHFrames() {
continue;
SectionEntry *Text = &Sections[SectionInfo.TextSID];
SectionEntry *EHFrame = &Sections[SectionInfo.EHFrameSID];
- SectionEntry *ExceptTab = NULL;
+ SectionEntry *ExceptTab = nullptr;
if (SectionInfo.ExceptTabSID != RTDYLD_INVALID_SECTION_ID)
ExceptTab = &Sections[SectionInfo.ExceptTabSID];
@@ -87,7 +90,8 @@ void RuntimeDyldMachO::registerEHFrames() {
UnregisteredEHFrameSections.clear();
}
-void RuntimeDyldMachO::finalizeLoad(ObjSectionToIDMap &SectionMap) {
+void RuntimeDyldMachO::finalizeLoad(ObjectImage &ObjImg,
+ ObjSectionToIDMap &SectionMap) {
unsigned EHFrameSID = RTDYLD_INVALID_SECTION_ID;
unsigned TextSID = RTDYLD_INVALID_SECTION_ID;
unsigned ExceptTabSID = RTDYLD_INVALID_SECTION_ID;
@@ -102,6 +106,12 @@ void RuntimeDyldMachO::finalizeLoad(ObjSectionToIDMap &SectionMap) {
TextSID = i->second;
else if (Name == "__gcc_except_tab")
ExceptTabSID = i->second;
+ else if (Name == "__jump_table")
+ populateJumpTable(cast<MachOObjectFile>(*ObjImg.getObjectFile()),
+ Section, i->second);
+ else if (Name == "__pointers")
+ populatePointersSection(cast<MachOObjectFile>(*ObjImg.getObjectFile()),
+ Section, i->second);
}
UnregisteredEHFrameSections.push_back(
EHFrameRelatedSections(EHFrameSID, TextSID, ExceptTabSID));
@@ -129,91 +139,87 @@ void RuntimeDyldMachO::finalizeLoad(ObjSectionToIDMap &SectionMap) {
// symbol in the target address space.
void RuntimeDyldMachO::resolveRelocation(const RelocationEntry &RE,
uint64_t Value) {
- const SectionEntry &Section = Sections[RE.SectionID];
- return resolveRelocation(Section, RE.Offset, Value, RE.RelType, RE.Addend,
- RE.IsPCRel, RE.Size);
-}
-
-void RuntimeDyldMachO::resolveRelocation(const SectionEntry &Section,
- uint64_t Offset, uint64_t Value,
- uint32_t Type, int64_t Addend,
- bool isPCRel, unsigned LogSize) {
- uint8_t *LocalAddress = Section.Address + Offset;
- uint64_t FinalAddress = Section.LoadAddress + Offset;
- unsigned MachoType = Type;
- unsigned Size = 1 << LogSize;
-
- DEBUG(dbgs() << "resolveRelocation LocalAddress: "
- << format("%p", LocalAddress)
- << " FinalAddress: " << format("%p", FinalAddress)
- << " Value: " << format("%p", Value) << " Addend: " << Addend
- << " isPCRel: " << isPCRel << " MachoType: " << MachoType
- << " Size: " << Size << "\n");
+ DEBUG (
+ const SectionEntry &Section = Sections[RE.SectionID];
+ uint8_t* LocalAddress = Section.Address + RE.Offset;
+ uint64_t FinalAddress = Section.LoadAddress + RE.Offset;
+
+ dbgs() << "resolveRelocation Section: " << RE.SectionID
+ << " LocalAddress: " << format("%p", LocalAddress)
+ << " FinalAddress: " << format("%p", FinalAddress)
+ << " Value: " << format("%p", Value)
+ << " Addend: " << RE.Addend
+ << " isPCRel: " << RE.IsPCRel
+ << " MachoType: " << RE.RelType
+ << " Size: " << (1 << RE.Size) << "\n";
+ );
// This just dispatches to the proper target specific routine.
switch (Arch) {
default:
llvm_unreachable("Unsupported CPU type!");
case Triple::x86_64:
- resolveX86_64Relocation(LocalAddress, FinalAddress, (uintptr_t)Value,
- isPCRel, MachoType, Size, Addend);
+ resolveX86_64Relocation(RE, Value);
break;
case Triple::x86:
- resolveI386Relocation(LocalAddress, FinalAddress, (uintptr_t)Value, isPCRel,
- MachoType, Size, Addend);
+ resolveI386Relocation(RE, Value);
break;
case Triple::arm: // Fall through.
case Triple::thumb:
- resolveARMRelocation(LocalAddress, FinalAddress, (uintptr_t)Value, isPCRel,
- MachoType, Size, Addend);
+ resolveARMRelocation(RE, Value);
break;
+ case Triple::aarch64:
case Triple::arm64:
- resolveARM64Relocation(LocalAddress, FinalAddress, (uintptr_t)Value,
- isPCRel, MachoType, Size, Addend);
+ resolveAArch64Relocation(RE, Value);
break;
}
}
-bool RuntimeDyldMachO::resolveI386Relocation(uint8_t *LocalAddress,
- uint64_t FinalAddress,
- uint64_t Value, bool isPCRel,
- unsigned Type, unsigned Size,
- int64_t Addend) {
- if (isPCRel)
- Value -= FinalAddress + 4; // see resolveX86_64Relocation
+bool RuntimeDyldMachO::resolveI386Relocation(const RelocationEntry &RE,
+ uint64_t Value) {
+ const SectionEntry &Section = Sections[RE.SectionID];
+ uint8_t* LocalAddress = Section.Address + RE.Offset;
- switch (Type) {
- default:
- llvm_unreachable("Invalid relocation type!");
- case MachO::GENERIC_RELOC_VANILLA: {
- uint8_t *p = LocalAddress;
- uint64_t ValueToWrite = Value + Addend;
- for (unsigned i = 0; i < Size; ++i) {
- *p++ = (uint8_t)(ValueToWrite & 0xff);
- ValueToWrite >>= 8;
- }
- return false;
+ if (RE.IsPCRel) {
+ uint64_t FinalAddress = Section.LoadAddress + RE.Offset;
+ Value -= FinalAddress + 4; // see MachOX86_64::resolveRelocation.
}
- case MachO::GENERIC_RELOC_SECTDIFF:
- case MachO::GENERIC_RELOC_LOCAL_SECTDIFF:
- case MachO::GENERIC_RELOC_PB_LA_PTR:
- return Error("Relocation type not implemented yet!");
+
+ switch (RE.RelType) {
+ default:
+ llvm_unreachable("Invalid relocation type!");
+ case MachO::GENERIC_RELOC_VANILLA:
+ return applyRelocationValue(LocalAddress, Value + RE.Addend,
+ 1 << RE.Size);
+ case MachO::GENERIC_RELOC_SECTDIFF:
+ case MachO::GENERIC_RELOC_LOCAL_SECTDIFF: {
+ uint64_t SectionABase = Sections[RE.Sections.SectionA].LoadAddress;
+ uint64_t SectionBBase = Sections[RE.Sections.SectionB].LoadAddress;
+ assert((Value == SectionABase || Value == SectionBBase) &&
+ "Unexpected SECTDIFF relocation value.");
+ Value = SectionABase - SectionBBase + RE.Addend;
+ return applyRelocationValue(LocalAddress, Value, 1 << RE.Size);
+ }
+ case MachO::GENERIC_RELOC_PB_LA_PTR:
+ return Error("Relocation type not implemented yet!");
}
}
-bool RuntimeDyldMachO::resolveX86_64Relocation(uint8_t *LocalAddress,
- uint64_t FinalAddress,
- uint64_t Value, bool isPCRel,
- unsigned Type, unsigned Size,
- int64_t Addend) {
+bool RuntimeDyldMachO::resolveX86_64Relocation(const RelocationEntry &RE,
+ uint64_t Value) {
+ const SectionEntry &Section = Sections[RE.SectionID];
+ uint8_t* LocalAddress = Section.Address + RE.Offset;
+
// If the relocation is PC-relative, the value to be encoded is the
// pointer difference.
- if (isPCRel)
+ if (RE.IsPCRel) {
// FIXME: It seems this value needs to be adjusted by 4 for an effective PC
// address. Is that expected? Only for branches, perhaps?
- Value -= FinalAddress + 4;
+ uint64_t FinalAddress = Section.LoadAddress + RE.Offset;
+ Value -= FinalAddress + 4; // see MachOX86_64::resolveRelocation.
+ }
- switch (Type) {
+ switch (RE.RelType) {
default:
llvm_unreachable("Invalid relocation type!");
case MachO::X86_64_RELOC_SIGNED_1:
@@ -221,17 +227,8 @@ bool RuntimeDyldMachO::resolveX86_64Relocation(uint8_t *LocalAddress,
case MachO::X86_64_RELOC_SIGNED_4:
case MachO::X86_64_RELOC_SIGNED:
case MachO::X86_64_RELOC_UNSIGNED:
- case MachO::X86_64_RELOC_BRANCH: {
- Value += Addend;
- // Mask in the target value a byte at a time (we don't have an alignment
- // guarantee for the target address, so this is safest).
- uint8_t *p = (uint8_t *)LocalAddress;
- for (unsigned i = 0; i < Size; ++i) {
- *p++ = (uint8_t)Value;
- Value >>= 8;
- }
- return false;
- }
+ case MachO::X86_64_RELOC_BRANCH:
+ return applyRelocationValue(LocalAddress, Value + RE.Addend, 1 << RE.Size);
case MachO::X86_64_RELOC_GOT_LOAD:
case MachO::X86_64_RELOC_GOT:
case MachO::X86_64_RELOC_SUBTRACTOR:
@@ -240,14 +237,15 @@ bool RuntimeDyldMachO::resolveX86_64Relocation(uint8_t *LocalAddress,
}
}
-bool RuntimeDyldMachO::resolveARMRelocation(uint8_t *LocalAddress,
- uint64_t FinalAddress,
- uint64_t Value, bool isPCRel,
- unsigned Type, unsigned Size,
- int64_t Addend) {
+bool RuntimeDyldMachO::resolveARMRelocation(const RelocationEntry &RE,
+ uint64_t Value) {
+ const SectionEntry &Section = Sections[RE.SectionID];
+ uint8_t* LocalAddress = Section.Address + RE.Offset;
+
// If the relocation is PC-relative, the value to be encoded is the
// pointer difference.
- if (isPCRel) {
+ if (RE.IsPCRel) {
+ uint64_t FinalAddress = Section.LoadAddress + RE.Offset;
Value -= FinalAddress;
// ARM PCRel relocations have an effective-PC offset of two instructions
// (four bytes in Thumb mode, 8 bytes in ARM mode).
@@ -255,19 +253,11 @@ bool RuntimeDyldMachO::resolveARMRelocation(uint8_t *LocalAddress,
Value -= 8;
}
- switch (Type) {
+ switch (RE.RelType) {
default:
llvm_unreachable("Invalid relocation type!");
- case MachO::ARM_RELOC_VANILLA: {
- // Mask in the target value a byte at a time (we don't have an alignment
- // guarantee for the target address, so this is safest).
- uint8_t *p = (uint8_t *)LocalAddress;
- for (unsigned i = 0; i < Size; ++i) {
- *p++ = (uint8_t)Value;
- Value >>= 8;
- }
- break;
- }
+ case MachO::ARM_RELOC_VANILLA:
+ return applyRelocationValue(LocalAddress, Value, 1 << RE.Size);
case MachO::ARM_RELOC_BR24: {
// Mask the value into the target address. We know instructions are
// 32-bit aligned, so we can do it all at once.
@@ -275,13 +265,16 @@ bool RuntimeDyldMachO::resolveARMRelocation(uint8_t *LocalAddress,
// The low two bits of the value are not encoded.
Value >>= 2;
// Mask the value to 24 bits.
- Value &= 0xffffff;
+ uint64_t FinalValue = Value & 0xffffff;
+ // Check for overflow.
+ if (Value != FinalValue)
+ return Error("ARM BR24 relocation out of range.");
// FIXME: If the destination is a Thumb function (and the instruction
// is a non-predicated BL instruction), we need to change it to a BLX
// instruction instead.
// Insert the value into the instruction.
- *p = (*p & ~0xffffff) | Value;
+ *p = (*p & ~0xffffff) | FinalValue;
break;
}
case MachO::ARM_THUMB_RELOC_BR22:
@@ -297,29 +290,23 @@ bool RuntimeDyldMachO::resolveARMRelocation(uint8_t *LocalAddress,
return false;
}
-bool RuntimeDyldMachO::resolveARM64Relocation(uint8_t *LocalAddress,
- uint64_t FinalAddress,
- uint64_t Value, bool isPCRel,
- unsigned Type, unsigned Size,
- int64_t Addend) {
+bool RuntimeDyldMachO::resolveAArch64Relocation(const RelocationEntry &RE,
+ uint64_t Value) {
+ const SectionEntry &Section = Sections[RE.SectionID];
+ uint8_t* LocalAddress = Section.Address + RE.Offset;
+
// If the relocation is PC-relative, the value to be encoded is the
// pointer difference.
- if (isPCRel)
+ if (RE.IsPCRel) {
+ uint64_t FinalAddress = Section.LoadAddress + RE.Offset;
Value -= FinalAddress;
+ }
- switch (Type) {
+ switch (RE.RelType) {
default:
llvm_unreachable("Invalid relocation type!");
- case MachO::ARM64_RELOC_UNSIGNED: {
- // Mask in the target value a byte at a time (we don't have an alignment
- // guarantee for the target address, so this is safest).
- uint8_t *p = (uint8_t *)LocalAddress;
- for (unsigned i = 0; i < Size; ++i) {
- *p++ = (uint8_t)Value;
- Value >>= 8;
- }
- break;
- }
+ case MachO::ARM64_RELOC_UNSIGNED:
+ return applyRelocationValue(LocalAddress, Value, 1 << RE.Size);
case MachO::ARM64_RELOC_BRANCH26: {
// Mask the value into the target address. We know instructions are
// 32-bit aligned, so we can do it all at once.
@@ -327,9 +314,12 @@ bool RuntimeDyldMachO::resolveARM64Relocation(uint8_t *LocalAddress,
// The low two bits of the value are not encoded.
Value >>= 2;
// Mask the value to 26 bits.
- Value &= 0x3ffffff;
+ uint64_t FinalValue = Value & 0x3ffffff;
+ // Check for overflow.
+ if (FinalValue != Value)
+ return Error("ARM64 BRANCH26 relocation out of range.");
// Insert the value into the instruction.
- *p = (*p & ~0x3ffffff) | Value;
+ *p = (*p & ~0x3ffffff) | FinalValue;
break;
}
case MachO::ARM64_RELOC_SUBTRACTOR:
@@ -346,6 +336,198 @@ bool RuntimeDyldMachO::resolveARM64Relocation(uint8_t *LocalAddress,
return false;
}
+void RuntimeDyldMachO::populateJumpTable(MachOObjectFile &Obj,
+ const SectionRef &JTSection,
+ unsigned JTSectionID) {
+ assert(!Obj.is64Bit() &&
+ "__jump_table section not supported in 64-bit MachO.");
+
+ MachO::dysymtab_command DySymTabCmd = Obj.getDysymtabLoadCommand();
+ MachO::section Sec32 = Obj.getSection(JTSection.getRawDataRefImpl());
+ uint32_t JTSectionSize = Sec32.size;
+ unsigned FirstIndirectSymbol = Sec32.reserved1;
+ unsigned JTEntrySize = Sec32.reserved2;
+ unsigned NumJTEntries = JTSectionSize / JTEntrySize;
+ uint8_t* JTSectionAddr = getSectionAddress(JTSectionID);
+ unsigned JTEntryOffset = 0;
+
+ assert((JTSectionSize % JTEntrySize) == 0 &&
+ "Jump-table section does not contain a whole number of stubs?");
+
+ for (unsigned i = 0; i < NumJTEntries; ++i) {
+ unsigned SymbolIndex =
+ Obj.getIndirectSymbolTableEntry(DySymTabCmd, FirstIndirectSymbol + i);
+ symbol_iterator SI = Obj.getSymbolByIndex(SymbolIndex);
+ StringRef IndirectSymbolName;
+ SI->getName(IndirectSymbolName);
+ uint8_t* JTEntryAddr = JTSectionAddr + JTEntryOffset;
+ createStubFunction(JTEntryAddr);
+ RelocationEntry RE(JTSectionID, JTEntryOffset + 1,
+ MachO::GENERIC_RELOC_VANILLA, 0, true, 2);
+ addRelocationForSymbol(RE, IndirectSymbolName);
+ JTEntryOffset += JTEntrySize;
+ }
+}
+
+void RuntimeDyldMachO::populatePointersSection(MachOObjectFile &Obj,
+ const SectionRef &PTSection,
+ unsigned PTSectionID) {
+ assert(!Obj.is64Bit() &&
+ "__pointers 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 __pointers, 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;
+ }
+}
+
+
+section_iterator 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, SSize;
+ SI->getAddress(SAddr);
+ SI->getSize(SSize);
+ if ((Addr >= SAddr) && (Addr < SAddr + SSize))
+ return SI;
+ }
+
+ return SE;
+}
+
+relocation_iterator RuntimeDyldMachO::processSECTDIFFRelocation(
+ unsigned SectionID,
+ relocation_iterator RelI,
+ ObjectImage &Obj,
+ ObjSectionToIDMap &ObjSectionToID) {
+ const MachOObjectFile *MachO =
+ static_cast<const MachOObjectFile*>(Obj.getObjectFile());
+ MachO::any_relocation_info RE =
+ MachO->getRelocation(RelI->getRawDataRefImpl());
+
+ SectionEntry &Section = Sections[SectionID];
+ uint32_t RelocType = MachO->getAnyRelocationType(RE);
+ bool IsPCRel = MachO->getAnyRelocationPCRel(RE);
+ unsigned Size = MachO->getAnyRelocationLength(RE);
+ uint64_t Offset;
+ RelI->getOffset(Offset);
+ uint8_t *LocalAddress = Section.Address + Offset;
+ unsigned NumBytes = 1 << Size;
+ int64_t Addend = 0;
+ memcpy(&Addend, LocalAddress, NumBytes);
+
+ ++RelI;
+ MachO::any_relocation_info RE2 =
+ MachO->getRelocation(RelI->getRawDataRefImpl());
+
+ uint32_t AddrA = MachO->getScatteredRelocationValue(RE);
+ section_iterator SAI = getSectionByAddress(*MachO, AddrA);
+ assert(SAI != MachO->section_end() && "Can't find section for address A");
+ uint64_t SectionABase;
+ SAI->getAddress(SectionABase);
+ uint64_t SectionAOffset = AddrA - SectionABase;
+ SectionRef SectionA = *SAI;
+ bool IsCode;
+ SectionA.isText(IsCode);
+ uint32_t SectionAID = findOrEmitSection(Obj, SectionA, IsCode,
+ ObjSectionToID);
+
+ uint32_t AddrB = MachO->getScatteredRelocationValue(RE2);
+ section_iterator SBI = getSectionByAddress(*MachO, AddrB);
+ assert(SBI != MachO->section_end() && "Can't find section for address B");
+ uint64_t SectionBBase;
+ SBI->getAddress(SectionBBase);
+ uint64_t SectionBOffset = AddrB - SectionBBase;
+ SectionRef SectionB = *SBI;
+ uint32_t SectionBID = findOrEmitSection(Obj, SectionB, IsCode,
+ ObjSectionToID);
+
+ if (Addend != AddrA - AddrB)
+ Error("Unexpected SECTDIFF relocation addend.");
+
+ DEBUG(dbgs() << "Found SECTDIFF: AddrA: " << AddrA << ", AddrB: " << AddrB
+ << ", Addend: " << Addend << ", SectionA ID: "
+ << SectionAID << ", SectionAOffset: " << SectionAOffset
+ << ", SectionB ID: " << SectionBID << ", SectionBOffset: "
+ << SectionBOffset << "\n");
+ RelocationEntry R(SectionID, Offset, RelocType, 0,
+ SectionAID, SectionAOffset, SectionBID, SectionBOffset,
+ IsPCRel, Size);
+
+ addRelocationForSection(R, SectionAID);
+ addRelocationForSection(R, SectionBID);
+
+ return ++RelI;
+}
+
+relocation_iterator RuntimeDyldMachO::processI386ScatteredVANILLA(
+ unsigned SectionID,
+ relocation_iterator RelI,
+ ObjectImage &Obj,
+ ObjSectionToIDMap &ObjSectionToID) {
+ const MachOObjectFile *MachO =
+ static_cast<const MachOObjectFile*>(Obj.getObjectFile());
+ MachO::any_relocation_info RE =
+ MachO->getRelocation(RelI->getRawDataRefImpl());
+
+ SectionEntry &Section = Sections[SectionID];
+ uint32_t RelocType = MachO->getAnyRelocationType(RE);
+ bool IsPCRel = MachO->getAnyRelocationPCRel(RE);
+ unsigned Size = MachO->getAnyRelocationLength(RE);
+ uint64_t Offset;
+ RelI->getOffset(Offset);
+ uint8_t *LocalAddress = Section.Address + Offset;
+ unsigned NumBytes = 1 << Size;
+ int64_t Addend = 0;
+ memcpy(&Addend, LocalAddress, NumBytes);
+
+ unsigned SymbolBaseAddr = MachO->getScatteredRelocationValue(RE);
+ section_iterator TargetSI = getSectionByAddress(*MachO, SymbolBaseAddr);
+ assert(TargetSI != MachO->section_end() && "Can't find section for symbol");
+ uint64_t SectionBaseAddr;
+ TargetSI->getAddress(SectionBaseAddr);
+ SectionRef TargetSection = *TargetSI;
+ bool IsCode;
+ TargetSection.isText(IsCode);
+ uint32_t TargetSectionID = findOrEmitSection(Obj, TargetSection, IsCode,
+ ObjSectionToID);
+
+ Addend -= SectionBaseAddr;
+ RelocationEntry R(SectionID, Offset, RelocType, Addend,
+ IsPCRel, Size);
+
+ addRelocationForSection(R, TargetSectionID);
+
+ return ++RelI;
+}
+
relocation_iterator RuntimeDyldMachO::processRelocationRef(
unsigned SectionID, relocation_iterator RelI, ObjectImage &Obj,
ObjSectionToIDMap &ObjSectionToID, const SymbolTableMap &Symbols,
@@ -358,18 +540,28 @@ relocation_iterator RuntimeDyldMachO::processRelocationRef(
uint32_t RelType = MachO->getAnyRelocationType(RE);
// FIXME: Properly handle scattered relocations.
- // For now, optimistically skip these: they can often be ignored, as
- // the static linker will already have applied the relocation, and it
- // only needs to be reapplied if symbols move relative to one another.
- // Note: This will fail horribly where the relocations *do* need to be
- // applied, but that was already the case.
- if (MachO->isRelocationScattered(RE))
- return ++RelI;
+ // Special case the couple of scattered relocations that we know how
+ // to handle: SECTDIFF relocations, and scattered VANILLA relocations
+ // on I386.
+ // For all other scattered relocations, just bail out and hope for the
+ // best, since the offsets computed by scattered relocations have often
+ // been optimisticaly filled in by the compiler. This will fail
+ // horribly where the relocations *do* need to be applied, but that was
+ // already the case.
+ if (MachO->isRelocationScattered(RE)) {
+ if (RelType == MachO::GENERIC_RELOC_SECTDIFF ||
+ RelType == MachO::GENERIC_RELOC_LOCAL_SECTDIFF)
+ return processSECTDIFFRelocation(SectionID, RelI, Obj, ObjSectionToID);
+ else if (Arch == Triple::x86 && RelType == MachO::GENERIC_RELOC_VANILLA)
+ return processI386ScatteredVANILLA(SectionID, RelI, Obj, ObjSectionToID);
+ else
+ return ++RelI;
+ }
RelocationValueRef Value;
SectionEntry &Section = Sections[SectionID];
- bool isExtern = MachO->getPlainRelocationExternal(RE);
+ bool IsExtern = MachO->getPlainRelocationExternal(RE);
bool IsPCRel = MachO->getAnyRelocationPCRel(RE);
unsigned Size = MachO->getAnyRelocationLength(RE);
uint64_t Offset;
@@ -379,7 +571,7 @@ relocation_iterator RuntimeDyldMachO::processRelocationRef(
uint64_t Addend = 0;
memcpy(&Addend, LocalAddress, NumBytes);
- if (isExtern) {
+ if (IsExtern) {
// Obtain the symbol name which is referenced in the relocation
symbol_iterator Symbol = RelI->getSymbol();
StringRef TargetName;
@@ -401,6 +593,17 @@ relocation_iterator RuntimeDyldMachO::processRelocationRef(
Value.Addend = Addend;
}
}
+
+ // Addends for external, PC-rel relocations on i386 point back to the zero
+ // offset. Calculate the final offset from the relocation target instead.
+ // This allows us to use the same logic for both external and internal
+ // relocations in resolveI386RelocationRef.
+ if (Arch == Triple::x86 && IsPCRel) {
+ uint64_t RelocAddr = 0;
+ RelI->getAddress(RelocAddr);
+ Value.Addend += RelocAddr + 4;
+ }
+
} else {
SectionRef Sec = MachO->getRelocationSection(RE);
bool IsCode = false;
@@ -417,6 +620,10 @@ relocation_iterator RuntimeDyldMachO::processRelocationRef(
RelType == MachO::X86_64_RELOC_GOT_LOAD)) {
assert(IsPCRel);
assert(Size == 2);
+
+ // FIXME: Teach the generic code above not to prematurely conflate
+ // relocation addends and symbol offsets.
+ Value.Addend -= Addend;
StubMap::const_iterator i = Stubs.find(Value);
uint8_t *Addr;
if (i != Stubs.end()) {
@@ -424,41 +631,45 @@ relocation_iterator RuntimeDyldMachO::processRelocationRef(
} else {
Stubs[Value] = Section.StubOffset;
uint8_t *GOTEntry = Section.Address + Section.StubOffset;
- RelocationEntry RE(SectionID, Section.StubOffset,
- MachO::X86_64_RELOC_UNSIGNED, 0, false, 3);
+ RelocationEntry GOTRE(SectionID, Section.StubOffset,
+ MachO::X86_64_RELOC_UNSIGNED, Value.Addend, false,
+ 3);
if (Value.SymbolName)
- addRelocationForSymbol(RE, Value.SymbolName);
+ addRelocationForSymbol(GOTRE, Value.SymbolName);
else
- addRelocationForSection(RE, Value.SectionID);
+ addRelocationForSection(GOTRE, Value.SectionID);
Section.StubOffset += 8;
Addr = GOTEntry;
}
- resolveRelocation(Section, Offset, (uint64_t)Addr,
- MachO::X86_64_RELOC_UNSIGNED, Value.Addend, true, 2);
+ RelocationEntry TargetRE(SectionID, Offset,
+ MachO::X86_64_RELOC_UNSIGNED, Addend, true,
+ 2);
+ resolveRelocation(TargetRE, (uint64_t)Addr);
} else if (Arch == Triple::arm && (RelType & 0xf) == MachO::ARM_RELOC_BR24) {
// This is an ARM branch relocation, need to use a stub function.
// Look up for existing stub.
StubMap::const_iterator i = Stubs.find(Value);
- if (i != Stubs.end())
- resolveRelocation(Section, Offset, (uint64_t)Section.Address + i->second,
- RelType, 0, IsPCRel, Size);
- else {
+ uint8_t *Addr;
+ if (i != Stubs.end()) {
+ Addr = Section.Address + i->second;
+ } else {
// Create a new stub function.
Stubs[Value] = Section.StubOffset;
uint8_t *StubTargetAddr =
createStubFunction(Section.Address + Section.StubOffset);
- RelocationEntry RE(SectionID, StubTargetAddr - Section.Address,
- MachO::GENERIC_RELOC_VANILLA, Value.Addend);
+ RelocationEntry StubRE(SectionID, StubTargetAddr - Section.Address,
+ MachO::GENERIC_RELOC_VANILLA, Value.Addend);
if (Value.SymbolName)
- addRelocationForSymbol(RE, Value.SymbolName);
+ addRelocationForSymbol(StubRE, Value.SymbolName);
else
- addRelocationForSection(RE, Value.SectionID);
- resolveRelocation(Section, Offset,
- (uint64_t)Section.Address + Section.StubOffset, RelType,
- 0, IsPCRel, Size);
+ addRelocationForSection(StubRE, Value.SectionID);
+ Addr = Section.Address + Section.StubOffset;
Section.StubOffset += getMaxStubSize();
}
+ RelocationEntry TargetRE(Value.SectionID, Offset, RelType, 0, IsPCRel,
+ Size);
+ resolveRelocation(TargetRE, (uint64_t)Addr);
} else {
RelocationEntry RE(SectionID, Offset, RelType, Value.Addend, IsPCRel, Size);
if (Value.SymbolName)
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
index 1006176..060eb8c 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
@@ -25,22 +25,31 @@ using namespace llvm::object;
namespace llvm {
class RuntimeDyldMachO : public RuntimeDyldImpl {
- bool resolveI386Relocation(uint8_t *LocalAddress, uint64_t FinalAddress,
- uint64_t Value, bool isPCRel, unsigned Type,
- unsigned Size, int64_t Addend);
- bool resolveX86_64Relocation(uint8_t *LocalAddress, uint64_t FinalAddress,
- uint64_t Value, bool isPCRel, unsigned Type,
- unsigned Size, int64_t Addend);
- bool resolveARMRelocation(uint8_t *LocalAddress, uint64_t FinalAddress,
- uint64_t Value, bool isPCRel, unsigned Type,
- unsigned Size, int64_t Addend);
- bool resolveARM64Relocation(uint8_t *LocalAddress, uint64_t FinalAddress,
- uint64_t Value, bool IsPCRel, unsigned Type,
- unsigned Size, int64_t Addend);
-
- void resolveRelocation(const SectionEntry &Section, uint64_t Offset,
- uint64_t Value, uint32_t Type, int64_t Addend,
- bool isPCRel, unsigned Size);
+private:
+
+ /// Write the least significant 'Size' bytes in 'Value' out at the address
+ /// pointed to by Addr.
+ bool applyRelocationValue(uint8_t *Addr, uint64_t Value, unsigned Size) {
+ for (unsigned i = 0; i < Size; ++i) {
+ *Addr++ = (uint8_t)Value;
+ Value >>= 8;
+ }
+
+ return false;
+ }
+
+ bool resolveI386Relocation(const RelocationEntry &RE, uint64_t Value);
+ bool resolveX86_64Relocation(const RelocationEntry &RE, uint64_t Value);
+ bool resolveARMRelocation(const RelocationEntry &RE, uint64_t Value);
+ bool resolveAArch64Relocation(const RelocationEntry &RE, uint64_t Value);
+
+ // Populate stubs in __jump_table section.
+ void populateJumpTable(MachOObjectFile &Obj, const SectionRef &JTSection,
+ unsigned JTSectionID);
+
+ // Populate __pointers section.
+ void populatePointersSection(MachOObjectFile &Obj, const SectionRef &PTSection,
+ unsigned PTSectionID);
unsigned getMaxStubSize() override {
if (Arch == Triple::arm || Arch == Triple::thumb)
@@ -53,6 +62,18 @@ class RuntimeDyldMachO : public RuntimeDyldImpl {
unsigned getStubAlignment() override { return 1; }
+ relocation_iterator processSECTDIFFRelocation(
+ unsigned SectionID,
+ relocation_iterator RelI,
+ ObjectImage &ObjImg,
+ ObjSectionToIDMap &ObjSectionToID);
+
+ relocation_iterator processI386ScatteredVANILLA(
+ unsigned SectionID,
+ relocation_iterator RelI,
+ ObjectImage &ObjImg,
+ ObjSectionToIDMap &ObjSectionToID);
+
struct EHFrameRelatedSections {
EHFrameRelatedSections()
: EHFrameSID(RTDYLD_INVALID_SECTION_ID),
@@ -81,15 +102,16 @@ public:
bool isCompatibleFormat(const ObjectBuffer *Buffer) const override;
bool isCompatibleFile(const object::ObjectFile *Obj) const override;
void registerEHFrames() override;
- void finalizeLoad(ObjSectionToIDMap &SectionMap) override;
+ void finalizeLoad(ObjectImage &ObjImg,
+ ObjSectionToIDMap &SectionMap) override;
static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer) {
return new ObjectImageCommon(InputBuffer);
}
static ObjectImage *
- createObjectImageFromFile(object::ObjectFile *InputObject) {
- return new ObjectImageCommon(InputObject);
+ createObjectImageFromFile(std::unique_ptr<object::ObjectFile> InputObject) {
+ return new ObjectImageCommon(std::move(InputObject));
}
};
generated by cgit v1.1 at 2024-06-07 19:37:43 +0000