#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/ELF.h"
#include "llvm/ADT/Triple.h"
+#include "llvm/Object/ELF.h"
+#include "JITRegistrar.h"
using namespace llvm;
using namespace llvm::object;
+namespace {
+
+template<support::endianness target_endianness, bool is64Bits>
+class DyldELFObject : public ELFObjectFile<target_endianness, is64Bits> {
+ LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
+
+ typedef Elf_Shdr_Impl<target_endianness, is64Bits> Elf_Shdr;
+ typedef Elf_Sym_Impl<target_endianness, is64Bits> Elf_Sym;
+ typedef Elf_Rel_Impl<target_endianness, is64Bits, false> Elf_Rel;
+ typedef Elf_Rel_Impl<target_endianness, is64Bits, true> Elf_Rela;
+
+ typedef typename ELFObjectFile<target_endianness, is64Bits>::
+ Elf_Ehdr Elf_Ehdr;
+
+ typedef typename ELFDataTypeTypedefHelper<
+ target_endianness, is64Bits>::value_type addr_type;
+
+protected:
+ // This duplicates the 'Data' member in the 'Binary' base class
+ // but it is necessary to workaround a bug in gcc 4.2
+ MemoryBuffer *InputData;
+
+public:
+ DyldELFObject(MemoryBuffer *Object, error_code &ec);
+
+ void updateSectionAddress(const SectionRef &Sec, uint64_t Addr);
+ void updateSymbolAddress(const SymbolRef &Sym, uint64_t Addr);
+
+ const MemoryBuffer& getBuffer() const { return *InputData; }
+
+ // Methods for type inquiry through isa, cast, and dyn_cast
+ static inline bool classof(const Binary *v) {
+ return (isa<ELFObjectFile<target_endianness, is64Bits> >(v)
+ && classof(cast<ELFObjectFile<target_endianness, is64Bits> >(v)));
+ }
+ static inline bool classof(
+ const ELFObjectFile<target_endianness, is64Bits> *v) {
+ return v->isDyldType();
+ }
+ static inline bool classof(const DyldELFObject *v) {
+ return true;
+ }
+};
+
+template<support::endianness target_endianness, bool is64Bits>
+class ELFObjectImage : public ObjectImage {
+ protected:
+ DyldELFObject<target_endianness, is64Bits> *DyldObj;
+ bool Registered;
+
+ public:
+ ELFObjectImage(DyldELFObject<target_endianness, is64Bits> *Obj)
+ : ObjectImage(Obj),
+ DyldObj(Obj),
+ Registered(false) {}
+
+ virtual ~ELFObjectImage() {
+ if (Registered)
+ deregisterWithDebugger();
+ }
+
+ // Subclasses can override these methods to update the image with loaded
+ // addresses for sections and common symbols
+ virtual void updateSectionAddress(const SectionRef &Sec, uint64_t Addr)
+ {
+ DyldObj->updateSectionAddress(Sec, Addr);
+ }
+
+ virtual void updateSymbolAddress(const SymbolRef &Sym, uint64_t Addr)
+ {
+ DyldObj->updateSymbolAddress(Sym, Addr);
+ }
+
+ virtual void registerWithDebugger()
+ {
+ JITRegistrar::getGDBRegistrar().registerObject(DyldObj->getBuffer());
+ Registered = true;
+ }
+ virtual void deregisterWithDebugger()
+ {
+ JITRegistrar::getGDBRegistrar().deregisterObject(DyldObj->getBuffer());
+ }
+};
+
+template<support::endianness target_endianness, bool is64Bits>
+DyldELFObject<target_endianness, is64Bits>::DyldELFObject(MemoryBuffer *Object,
+ error_code &ec)
+ : ELFObjectFile<target_endianness, is64Bits>(Object, ec),
+ InputData(Object) {
+ this->isDyldELFObject = true;
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+void DyldELFObject<target_endianness, is64Bits>::updateSectionAddress(
+ const SectionRef &Sec,
+ uint64_t Addr) {
+ DataRefImpl ShdrRef = Sec.getRawDataRefImpl();
+ Elf_Shdr *shdr = const_cast<Elf_Shdr*>(
+ reinterpret_cast<const Elf_Shdr *>(ShdrRef.p));
+
+ // This assumes the address passed in matches the target address bitness
+ // The template-based type cast handles everything else.
+ shdr->sh_addr = static_cast<addr_type>(Addr);
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+void DyldELFObject<target_endianness, is64Bits>::updateSymbolAddress(
+ const SymbolRef &SymRef,
+ uint64_t Addr) {
+
+ Elf_Sym *sym = const_cast<Elf_Sym*>(
+ ELFObjectFile<target_endianness, is64Bits>::
+ getSymbol(SymRef.getRawDataRefImpl()));
+
+ // This assumes the address passed in matches the target address bitness
+ // The template-based type cast handles everything else.
+ sym->st_value = static_cast<addr_type>(Addr);
+}
+
+} // namespace
+
+
namespace llvm {
+ObjectImage *RuntimeDyldELF::createObjectImage(
+ const MemoryBuffer *ConstInputBuffer) {
+ MemoryBuffer *InputBuffer = const_cast<MemoryBuffer*>(ConstInputBuffer);
+ std::pair<unsigned char, unsigned char> Ident = getElfArchType(InputBuffer);
+ error_code ec;
+
+ if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB) {
+ DyldELFObject<support::little, false> *Obj =
+ new DyldELFObject<support::little, false>(InputBuffer, ec);
+ return new ELFObjectImage<support::little, false>(Obj);
+ }
+ else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB) {
+ DyldELFObject<support::big, false> *Obj =
+ new DyldELFObject<support::big, false>(InputBuffer, ec);
+ return new ELFObjectImage<support::big, false>(Obj);
+ }
+ else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB) {
+ DyldELFObject<support::big, true> *Obj =
+ new DyldELFObject<support::big, true>(InputBuffer, ec);
+ return new ELFObjectImage<support::big, true>(Obj);
+ }
+ else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) {
+ DyldELFObject<support::little, true> *Obj =
+ new DyldELFObject<support::little, true>(InputBuffer, ec);
+ return new ELFObjectImage<support::little, true>(Obj);
+ }
+ else
+ llvm_unreachable("Unexpected ELF format");
+}
+
+void RuntimeDyldELF::handleObjectLoaded(ObjectImage *Obj)
+{
+ Obj->registerWithDebugger();
+ // Save the loaded object. It will deregister itself when deleted
+ LoadedObject = Obj;
+}
+
+RuntimeDyldELF::~RuntimeDyldELF() {
+ if (LoadedObject)
+ delete LoadedObject;
+}
void RuntimeDyldELF::resolveX86_64Relocation(uint8_t *LocalAddress,
uint64_t FinalAddress,
switch (Type) {
case ELF::R_386_32: {
uint32_t *Target = (uint32_t*)(LocalAddress);
- *Target = Value + Addend;
+ uint32_t Placeholder = *Target;
+ *Target = Placeholder + Value + Addend;
break;
}
case ELF::R_386_PC32: {
}
}
-void RuntimeDyldELF::
-processRelocationRef(const ObjRelocationInfo &Rel, const ObjectFile &Obj,
- ObjSectionToIDMap &ObjSectionToID,
- LocalSymbolMap &Symbols, StubMap &Stubs) {
+void RuntimeDyldELF::processRelocationRef(const ObjRelocationInfo &Rel,
+ ObjectImage &Obj,
+ ObjSectionToIDMap &ObjSectionToID,
+ LocalSymbolMap &Symbols,
+ StubMap &Stubs) {
uint32_t RelType = (uint32_t)(Rel.Type & 0xffffffffL);
intptr_t Addend = (intptr_t)Rel.AdditionalInfo;
<< " TargetName: " << TargetName
<< "\n");
// First look the symbol in object file symbols.
- LocalSymbolMap::iterator it = Symbols.find(TargetName.data());
- if (it != Symbols.end()) {
- Value.SectionID = it->second.first;
- Value.Addend = it->second.second;
+ LocalSymbolMap::iterator lsi = Symbols.find(TargetName.data());
+ if (lsi != Symbols.end()) {
+ Value.SectionID = lsi->second.first;
+ Value.Addend = lsi->second.second;
} else {
// Second look the symbol in global symbol table.
- StringMap<SymbolLoc>::iterator itS = SymbolTable.find(TargetName.data());
- if (itS != SymbolTable.end()) {
- Value.SectionID = itS->second.first;
- Value.Addend = itS->second.second;
+ StringMap<SymbolLoc>::iterator gsi = SymbolTable.find(TargetName.data());
+ if (gsi != SymbolTable.end()) {
+ Value.SectionID = gsi->second.first;
+ Value.Addend = gsi->second.second;
} else {
SymbolRef::Type SymType;
Symbol.getType(SymType);
// TODO: Now ELF SymbolRef::ST_Debug = STT_SECTION, it's not obviously
// and can be changed by another developers. Maybe best way is add
// a new symbol type ST_Section to SymbolRef and use it.
- section_iterator sIt = Obj.end_sections();
- Symbol.getSection(sIt);
- if (sIt == Obj.end_sections())
+ section_iterator si = Obj.end_sections();
+ Symbol.getSection(si);
+ if (si == Obj.end_sections())
llvm_unreachable("Symbol section not found, bad object file format!");
DEBUG(dbgs() << "\t\tThis is section symbol\n");
- Value.SectionID = findOrEmitSection((*sIt), true, ObjSectionToID);
+ Value.SectionID = findOrEmitSection(Obj, (*si), true, ObjSectionToID);
Value.Addend = Addend;
break;
}
uint8_t *Target = Section.Address + Rel.Offset;
// Look up for existing stub.
- StubMap::const_iterator stubIt = Stubs.find(Value);
- if (stubIt != Stubs.end()) {
+ StubMap::const_iterator i = Stubs.find(Value);
+ if (i != Stubs.end()) {
resolveRelocation(Target, Section.LoadAddress, (uint64_t)Section.Address +
- stubIt->second, RelType, 0);
+ i->second, RelType, 0);
DEBUG(dbgs() << " Stub function found\n");
} else {
// Create a new stub function.
projects / oota-llvm.git / blobdiff