#ifndef LLVM_RUNTIME_DYLD_IMPL_H
#define LLVM_RUNTIME_DYLD_IMPL_H
-#include "ObjectImage.h"
-#include "llvm/ExecutionEngine/RuntimeDyld.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/Triple.h"
+#include "llvm/ExecutionEngine/ObjectImage.h"
+#include "llvm/ExecutionEngine/RuntimeDyld.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/SwapByteOrder.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/system_error.h"
#include <map>
namespace llvm {
-class MemoryBuffer;
+class ObjectBuffer;
class Twine;
/// linker.
class SectionEntry {
public:
+ /// Name - section name.
+ StringRef Name;
+
/// Address - address in the linker's memory where the section resides.
uint8_t *Address;
- /// Size - section size.
+ /// Size - section size. Doesn't include the stubs.
size_t Size;
/// LoadAddress - the address of the section in the target process's memory.
/// for calculating relocations in some object formats (like MachO).
uintptr_t ObjAddress;
- SectionEntry(uint8_t *address, size_t size, uintptr_t stubOffset,
+ SectionEntry(StringRef name, uint8_t *address, size_t size,
uintptr_t objAddress)
- : Address(address), Size(size), LoadAddress((uintptr_t)address),
- StubOffset(stubOffset), ObjAddress(objAddress) {}
+ : Name(name), Address(address), Size(size), LoadAddress((uintptr_t)address),
+ StubOffset(size), ObjAddress(objAddress) {}
};
/// RelocationEntry - used to represent relocations internally in the dynamic
/// used to make a relocation section relative instead of symbol relative.
intptr_t Addend;
+ /// True if this is a PCRel relocation (MachO specific).
+ bool IsPCRel;
+
+ /// The size of this relocation (MachO specific).
+ unsigned Size;
+
RelocationEntry(unsigned id, uint64_t offset, uint32_t type, int64_t addend)
- : SectionID(id), Offset(offset), RelType(type), Addend(addend) {}
-};
+ : SectionID(id), Offset(offset), RelType(type), Addend(addend),
+ IsPCRel(false), Size(0) {}
-/// ObjRelocationInfo - relocation information as read from the object file.
-/// Used to pass around data taken from object::RelocationRef, together with
-/// the section to which the relocation points (represented by a SectionID).
-class ObjRelocationInfo {
-public:
- unsigned SectionID;
- uint64_t Offset;
- SymbolRef Symbol;
- uint64_t Type;
- int64_t AdditionalInfo;
+ RelocationEntry(unsigned id, uint64_t offset, uint32_t type, int64_t addend,
+ bool IsPCRel, unsigned Size)
+ : SectionID(id), Offset(offset), RelType(type), Addend(addend),
+ IsPCRel(IsPCRel), Size(Size) {}
};
class RelocationValueRef {
typedef StringMap<SymbolLoc> SymbolTableMap;
SymbolTableMap GlobalSymbolTable;
- // Keep a map of common symbols to their sizes
- typedef std::map<SymbolRef, unsigned> CommonSymbolMap;
+ // Pair representing the size and alignment requirement for a common symbol.
+ typedef std::pair<unsigned, unsigned> CommonSymbolInfo;
+ // Keep a map of common symbols to their info pairs
+ typedef std::map<SymbolRef, CommonSymbolInfo> CommonSymbolMap;
// For each symbol, keep a list of relocations based on it. Anytime
// its address is reassigned (the JIT re-compiled the function, e.g.),
// in the relocation list where it's stored.
typedef SmallVector<RelocationEntry, 64> RelocationList;
// Relocations to sections already loaded. Indexed by SectionID which is the
- // source of the address. The target where the address will be writen is
+ // source of the address. The target where the address will be written is
// SectionID/Offset in the relocation itself.
DenseMap<unsigned, RelocationList> Relocations;
Triple::ArchType Arch;
inline unsigned getMaxStubSize() {
+ if (Arch == Triple::aarch64)
+ return 20; // movz; movk; movk; movk; br
if (Arch == Triple::arm || Arch == Triple::thumb)
return 8; // 32-bit instruction and 32-bit address
+ else if (Arch == Triple::mipsel || Arch == Triple::mips)
+ return 16;
+ else if (Arch == Triple::ppc64)
+ return 44;
+ else if (Arch == Triple::x86_64)
+ return 8; // GOT
+ else if (Arch == Triple::systemz)
+ return 16;
else
return 0;
}
+ inline unsigned getStubAlignment() {
+ if (Arch == Triple::systemz)
+ return 8;
+ else
+ return 1;
+ }
+
bool HasError;
std::string ErrorStr;
return true;
}
+ uint64_t getSectionLoadAddress(unsigned SectionID) {
+ return Sections[SectionID].LoadAddress;
+ }
+
uint8_t *getSectionAddress(unsigned SectionID) {
return (uint8_t*)Sections[SectionID].Address;
}
+ void writeInt16BE(uint8_t *Addr, uint16_t Value) {
+ if (sys::IsLittleEndianHost)
+ Value = sys::SwapByteOrder(Value);
+ *Addr = (Value >> 8) & 0xFF;
+ *(Addr+1) = Value & 0xFF;
+ }
+
+ void writeInt32BE(uint8_t *Addr, uint32_t Value) {
+ if (sys::IsLittleEndianHost)
+ Value = sys::SwapByteOrder(Value);
+ *Addr = (Value >> 24) & 0xFF;
+ *(Addr+1) = (Value >> 16) & 0xFF;
+ *(Addr+2) = (Value >> 8) & 0xFF;
+ *(Addr+3) = Value & 0xFF;
+ }
+
+ void writeInt64BE(uint8_t *Addr, uint64_t Value) {
+ if (sys::IsLittleEndianHost)
+ Value = sys::SwapByteOrder(Value);
+ *Addr = (Value >> 56) & 0xFF;
+ *(Addr+1) = (Value >> 48) & 0xFF;
+ *(Addr+2) = (Value >> 40) & 0xFF;
+ *(Addr+3) = (Value >> 32) & 0xFF;
+ *(Addr+4) = (Value >> 24) & 0xFF;
+ *(Addr+5) = (Value >> 16) & 0xFF;
+ *(Addr+6) = (Value >> 8) & 0xFF;
+ *(Addr+7) = Value & 0xFF;
+ }
+
/// \brief Given the common symbols discovered in the object file, emit a
/// new section for them and update the symbol mappings in the object and
/// symbol table.
/// \brief Resolves relocations from Relocs list with address from Value.
void resolveRelocationList(const RelocationList &Relocs, uint64_t Value);
- void resolveRelocationEntry(const RelocationEntry &RE, uint64_t Value);
/// \brief A object file specific relocation resolver
- /// \param Address Address to apply the relocation action
+ /// \param RE The relocation to be resolved
/// \param Value Target symbol address to apply the relocation action
- /// \param Type object file specific relocation type
- /// \param Addend A constant addend used to compute the value to be stored
- /// into the relocatable field
- virtual void resolveRelocation(uint8_t *LocalAddress,
- uint64_t FinalAddress,
- uint64_t Value,
- uint32_t Type,
- int64_t Addend) = 0;
+ virtual void resolveRelocation(const RelocationEntry &RE, uint64_t Value) = 0;
/// \brief Parses the object file relocation and stores it to Relocations
/// or SymbolRelocations (this depends on the object file type).
- virtual void processRelocationRef(const ObjRelocationInfo &Rel,
+ virtual void processRelocationRef(unsigned SectionID,
+ RelocationRef RelI,
ObjectImage &Obj,
ObjSectionToIDMap &ObjSectionToID,
const SymbolTableMap &Symbols,
/// \brief Resolve relocations to external symbols.
void resolveExternalSymbols();
- virtual ObjectImage *createObjectImage(const MemoryBuffer *InputBuffer);
- virtual void handleObjectLoaded(ObjectImage *Obj)
- {
- // Subclasses may choose to retain this image if they have a use for it
- delete Obj;
- }
-
+ virtual ObjectImage *createObjectImage(ObjectBuffer *InputBuffer);
public:
RuntimeDyldImpl(RTDyldMemoryManager *mm) : MemMgr(mm), HasError(false) {}
virtual ~RuntimeDyldImpl();
- bool loadObject(const MemoryBuffer *InputBuffer);
+ ObjectImage *loadObject(ObjectBuffer *InputBuffer);
void *getSymbolAddress(StringRef Name) {
// FIXME: Just look up as a function for now. Overly simple of course.
return getSectionAddress(Loc.first) + Loc.second;
}
+ uint64_t getSymbolLoadAddress(StringRef Name) {
+ // FIXME: Just look up as a function for now. Overly simple of course.
+ // Work in progress.
+ if (GlobalSymbolTable.find(Name) == GlobalSymbolTable.end())
+ return 0;
+ SymbolLoc Loc = GlobalSymbolTable.lookup(Name);
+ return getSectionLoadAddress(Loc.first) + Loc.second;
+ }
+
void resolveRelocations();
void reassignSectionAddress(unsigned SectionID, uint64_t Addr);
- void mapSectionAddress(void *LocalAddress, uint64_t TargetAddress);
+ void mapSectionAddress(const void *LocalAddress, uint64_t TargetAddress);
// Is the linker in an error state?
bool hasError() { return HasError; }
// Get the error message.
StringRef getErrorString() { return ErrorStr; }
- virtual bool isCompatibleFormat(const MemoryBuffer *InputBuffer) const = 0;
+ virtual bool isCompatibleFormat(const ObjectBuffer *Buffer) const = 0;
+ virtual StringRef getEHFrameSection();
};
} // end namespace llvm
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