Revert r153694. It was causing failures in the buildbots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153701 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 21 insertions, 147 deletions

diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index d6430a91c2..28e99be9ab 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -15,125 +15,45 @@
 #define LLVM_RUNTIME_DYLD_IMPL_H
 
 #include "llvm/ExecutionEngine/RuntimeDyld.h"
-#include "llvm/Object/ObjectFile.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
 #include "llvm/Support/Memory.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/system_error.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/ADT/Triple.h"
-#include <map>
-#include "llvm/Support/Format.h"
 
 using namespace llvm;
-using namespace llvm::object;
 
 namespace llvm {
-
-class SectionEntry {
-public:
-  uint8_t* Address;
-  size_t Size;
-  uint64_t LoadAddress;   // For each section, the address it will be
-                          // considered to live at for relocations. The same
-                          // as the pointer to the above memory block for
-                          // hosted JITs.
-  uintptr_t StubOffset;   // It's used for architecturies with stub
-                          // functions for far relocations like ARM.
-  uintptr_t ObjAddress;   // Section address in object file. It's use for
-                          // calculate MachO relocation addend
-  SectionEntry(uint8_t* address, size_t size, uintptr_t stubOffset,
-               uintptr_t objAddress)
-    : Address(address), Size(size), LoadAddress((uintptr_t)address),
-      StubOffset(stubOffset), ObjAddress(objAddress) {}
-};
-
-class RelocationEntry {
-public:
-  unsigned    SectionID;  // Section the relocation is contained in.
-  uintptr_t   Offset;     // Offset into the section for the relocation.
-  uint32_t    Data;       // Relocatino data. Including type of relocation
-                          // and another flags and parameners from
-  intptr_t    Addend;     // Addend encoded in the instruction itself, if any,
-                          // plus the offset into the source section for
-                          // the symbol once the relocation is resolvable.
-  RelocationEntry(unsigned id, uint64_t offset, uint32_t data, int64_t addend)
-    : SectionID(id), Offset(offset), Data(data), Addend(addend) {}
-};
-
-// Raw relocation data from object file
-class ObjRelocationInfo {
-public:
-  unsigned  SectionID;
-  uint64_t  Offset;
-  SymbolRef Symbol;
-  uint64_t  Type;
-  int64_t   AdditionalInfo;
-};
-
-class RelocationValueRef {
-public:
-  unsigned  SectionID;
-  intptr_t  Addend;
-  const char *SymbolName;
-  RelocationValueRef(): SectionID(0), Addend(0), SymbolName(0) {}
-
-  inline bool operator==(const RelocationValueRef &Other) const {
-    return std::memcmp(this, &Other, sizeof(RelocationValueRef)) == 0;
-  }
-  inline bool operator <(const RelocationValueRef &Other) const {
-    return std::memcmp(this, &Other, sizeof(RelocationValueRef)) < 0;
-  }
-};
-
 class RuntimeDyldImpl {
 protected:
+  unsigned CPUType;
+  unsigned CPUSubtype;
+
   // The MemoryManager to load objects into.
   RTDyldMemoryManager *MemMgr;
 
-  // A list of emmitted sections.
-  typedef SmallVector<SectionEntry, 64> SectionList;
-  SectionList Sections;
+  // For each section, we have a MemoryBlock of it's data.
+  // Indexed by SectionID.
+  SmallVector<sys::MemoryBlock, 32> Sections;
+  // For each section, the address it will be considered to live at for
+  // relocations. The same as the pointer to the above memory block for hosted
+  // JITs. Indexed by SectionID.
+  SmallVector<uint64_t, 32> SectionLoadAddress;
 
-  // Keep a map of sections from object file to the SectionID which
-  // references it.
-  typedef std::map<SectionRef, unsigned> ObjSectionToIDMap;
+  // Keep a map of starting local address to the SectionID which references it.
+  // Lookup function for when we assign virtual addresses.
+  DenseMap<void *, unsigned> SectionLocalMemToID;
 
   // Master symbol table. As modules are loaded and external symbols are
   // resolved, their addresses are stored here as a SectionID/Offset pair.
-  typedef std::pair<unsigned, uintptr_t> SymbolLoc;
+  typedef std::pair<unsigned, uint64_t> SymbolLoc;
   StringMap<SymbolLoc> SymbolTable;
-  typedef DenseMap<const char*, SymbolLoc> LocalSymbolMap;
-
-  // For each symbol, keep a list of relocations based on it. Anytime
-  // its address is reassigned (the JIT re-compiled the function, e.g.),
-  // the relocations get re-resolved.
-  // The symbol (or section) the relocation is sourced from is the Key
-  // 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
-  // SectionID/Offset in the relocation itself.
-  DenseMap<unsigned, RelocationList> Relocations;
-  // Relocations to external symbols that are not yet resolved.
-  // Indexed by symbol name.
-  StringMap<RelocationList> SymbolRelocations;
-
-  typedef std::map<RelocationValueRef, uintptr_t> StubMap;
-
-  Triple::ArchType Arch;
-
-  inline unsigned getMaxStubSize() {
-    if (Arch == Triple::arm || Arch == Triple::thumb)
-      return 8; // 32-bit instruction and 32-bit address
-    else
-      return 0;
-  }
 
   bool HasError;
   std::string ErrorStr;
@@ -146,62 +66,17 @@ protected:
   }
 
   uint8_t *getSectionAddress(unsigned SectionID) {
-    return (uint8_t*)Sections[SectionID].Address;
+    return (uint8_t*)Sections[SectionID].base();
   }
+  void extractFunction(StringRef Name, uint8_t *StartAddress,
+                       uint8_t *EndAddress);
 
-  /// \brief Emits section data from the object file to the MemoryManager.
-  /// \param IsCode if it's true then allocateCodeSection() will be
-  ///        used for emmits, else allocateDataSection() will be used.
-  /// \return SectionID.
-  unsigned emitSection(const SectionRef &Section, bool IsCode);
-
-  /// \brief Find Section in LocalSections. If the secton is not found - emit
-  ///        it and store in LocalSections.
-  /// \param IsCode if it's true then allocateCodeSection() will be
-  ///        used for emmits, else allocateDataSection() will be used.
-  /// \return SectionID.
-  unsigned findOrEmitSection(const SectionRef &Section, bool IsCode,
-                             ObjSectionToIDMap &LocalSections);
-
-  /// \brief If Value.SymbolName is NULL then store relocation to the
-  ///        Relocations, else store it in the SymbolRelocations.
-  void AddRelocation(const RelocationValueRef &Value, unsigned SectionID,
-                     uintptr_t Offset, uint32_t RelType);
-
-  /// \brief Emits long jump instruction to Addr.
-  /// \return Pointer to the memory area for emitting target address.
-  uint8_t* createStubFunction(uint8_t *Addr);
-
-  /// \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 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;
-
-  /// \brief Parses the object file relocation and store it to Relocations
-  ///        or SymbolRelocations. Its depend from object file type.
-  virtual void processRelocationRef(const ObjRelocationInfo &Rel,
-                                    const ObjectFile &Obj,
-                                    ObjSectionToIDMap &ObjSectionToID,
-                                    LocalSymbolMap &Symbols, StubMap &Stubs) = 0;
-
-  void resolveSymbols();
 public:
   RuntimeDyldImpl(RTDyldMemoryManager *mm) : MemMgr(mm), HasError(false) {}
 
   virtual ~RuntimeDyldImpl();
 
-  bool loadObject(const MemoryBuffer *InputBuffer);
+  virtual bool loadObject(MemoryBuffer *InputBuffer) = 0;
 
   void *getSymbolAddress(StringRef Name) {
     // FIXME: Just look up as a function for now. Overly simple of course.
@@ -212,9 +87,9 @@ public:
     return getSectionAddress(Loc.first) + Loc.second;
   }
 
-  void resolveRelocations();
+  virtual void resolveRelocations();
 
-  void reassignSectionAddress(unsigned SectionID, uint64_t Addr);
+  virtual void reassignSectionAddress(unsigned SectionID, uint64_t Addr) = 0;
 
   void mapSectionAddress(void *LocalAddress, uint64_t TargetAddress);
 
@@ -228,7 +103,6 @@ public:
   StringRef getErrorString() { return ErrorStr; }
 
   virtual bool isCompatibleFormat(const MemoryBuffer *InputBuffer) const = 0;
-
 };
 
 } // end namespace llvm