X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FExecutionEngine%2FRuntimeDyld%2FRuntimeDyldMachO.h;h=c8642826d4e7b8c9bce4e80c7f44f89bddc82e19;hb=be406de2251080a4a4c12c5bdec2eb1b92d44347;hp=898b85190e713fb9d74605d9fc3be4e78e661eb9;hpb=0e4fa5ff365fccff46870b7d5d8d4d1d46e77986;p=oota-llvm.git

diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
index 898b85190e7..c8642826d4e 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
@@ -14,57 +14,140 @@
 #ifndef LLVM_RUNTIME_DYLD_MACHO_H
 #define LLVM_RUNTIME_DYLD_MACHO_H
 
-#include "llvm/ADT/IndexedMap.h"
-#include "llvm/Object/MachOObject.h"
-#include "llvm/Support/Format.h"
+#include "ObjectImageCommon.h"
 #include "RuntimeDyldImpl.h"
+#include "llvm/Object/MachO.h"
+#include "llvm/Support/Format.h"
+
+#define DEBUG_TYPE "dyld"
 
 using namespace llvm;
 using namespace llvm::object;
 
-
 namespace llvm {
 class RuntimeDyldMachO : public RuntimeDyldImpl {
 protected:
-  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);
-
-  virtual void processRelocationRef(const ObjRelocationInfo &Rel,
-                                    const ObjectFile &Obj,
-                                    ObjSectionToIDMap &ObjSectionToID,
-                                    LocalSymbolMap &Symbols, StubMap &Stubs);
+  struct SectionOffsetPair {
+    unsigned SectionID;
+    uint64_t Offset;
+  };
+
+  struct EHFrameRelatedSections {
+    EHFrameRelatedSections()
+        : EHFrameSID(RTDYLD_INVALID_SECTION_ID),
+          TextSID(RTDYLD_INVALID_SECTION_ID),
+          ExceptTabSID(RTDYLD_INVALID_SECTION_ID) {}
+    EHFrameRelatedSections(SID EH, SID T, SID Ex)
+        : EHFrameSID(EH), TextSID(T), ExceptTabSID(Ex) {}
+    SID EHFrameSID;
+    SID TextSID;
+    SID ExceptTabSID;
+  };
+
+  // When a module is loaded we save the SectionID of the EH frame section
+  // in a table until we receive a request to register all unregistered
+  // EH frame sections with the memory manager.
+  SmallVector<EHFrameRelatedSections, 2> UnregisteredEHFrameSections;
 
-public:
-  virtual void resolveRelocation(uint8_t *LocalAddress,
-                                 uint64_t FinalAddress,
-                                 uint64_t Value,
-                                 uint32_t Type,
-                                 int64_t Addend);
-                                 
   RuntimeDyldMachO(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) {}
 
-  bool isCompatibleFormat(const MemoryBuffer *InputBuffer) const;
+  /// Parse the given relocation, which must be a non-scattered, and
+  /// return a RelocationEntry representing the information. The 'Addend' field
+  /// will contain the unmodified instruction immediate.
+  RelocationEntry getBasicRelocationEntry(unsigned SectionID, ObjectImage &Obj,
+                                          const relocation_iterator &RI) const;
+
+  /// Construct a RelocationValueRef representing the relocation target.
+  /// For Symbols in known sections, this will return a RelocationValueRef
+  /// representing a (SectionID, Offset) pair.
+  /// For Symbols whose section is not known, this will return a
+  /// (SymbolName, Offset) pair, where the Offset is taken from the instruction
+  /// immediate (held in RE.Addend).
+  /// In both cases the Addend field is *NOT* fixed up to be PC-relative. That
+  /// should be done by the caller where appropriate by calling makePCRel on
+  /// the RelocationValueRef.
+  RelocationValueRef getRelocationValueRef(ObjectImage &ObjImg,
+                                           const relocation_iterator &RI,
+                                           const RelocationEntry &RE,
+                                           ObjSectionToIDMap &ObjSectionToID,
+                                           const SymbolTableMap &Symbols);
+
+  /// Make the RelocationValueRef addend PC-relative.
+  void makeValueAddendPCRel(RelocationValueRef &Value, ObjectImage &ObjImg,
+                            const relocation_iterator &RI);
+
+  /// Dump information about the relocation entry (RE) and resolved value.
+  void dumpRelocationToResolve(const RelocationEntry &RE, uint64_t Value) const;
+
+public:
+  /// Create an ObjectImage from the given ObjectBuffer.
+  static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer) {
+    return new ObjectImageCommon(InputBuffer);
+  }
+
+  /// Create an ObjectImage from the given ObjectFile.
+  static ObjectImage *
+  createObjectImageFromFile(std::unique_ptr<object::ObjectFile> InputObject) {
+    return new ObjectImageCommon(std::move(InputObject));
+  }
+
+  /// Create a RuntimeDyldMachO instance for the given target architecture.
+  static std::unique_ptr<RuntimeDyldMachO> create(Triple::ArchType Arch,
+                                                  RTDyldMemoryManager *mm);
+
+  /// Write the least significant 'Size' bytes in 'Value' out at the address
+  /// pointed to by Addr. Check for overflow.
+  bool writeBytesUnaligned(uint8_t *Addr, uint64_t Value, unsigned Size);
+
+  SectionEntry &getSection(unsigned SectionID) { return Sections[SectionID]; }
+
+  bool isCompatibleFormat(const ObjectBuffer *Buffer) const override;
+  bool isCompatibleFile(const object::ObjectFile *Obj) const override;
+  void registerEHFrames() override;
+};
+
+/// RuntimeDyldMachOTarget - Templated base class for generic MachO linker
+/// algorithms and data structures.
+///
+/// Concrete, target specific sub-classes can be accessed via the impl()
+/// methods. (i.e. the RuntimeDyldMachO hierarchy uses the Curiously
+/// Recurring Template Idiom). Concrete subclasses for each target
+/// can be found in ./Targets.
+template <typename Impl>
+class RuntimeDyldMachOCRTPBase : public RuntimeDyldMachO {
+private:
+  Impl &impl() { return static_cast<Impl &>(*this); }
+  const Impl &impl() const { return static_cast<Impl &>(*this); }
+
+public:
+  RuntimeDyldMachOCRTPBase(RTDyldMemoryManager *mm) : RuntimeDyldMachO(mm) {}
+
+  void finalizeLoad(ObjectImage &ObjImg, ObjSectionToIDMap &SectionMap) {
+    unsigned EHFrameSID = RTDYLD_INVALID_SECTION_ID;
+    unsigned TextSID = RTDYLD_INVALID_SECTION_ID;
+    unsigned ExceptTabSID = RTDYLD_INVALID_SECTION_ID;
+    ObjSectionToIDMap::iterator i, e;
+
+    for (i = SectionMap.begin(), e = SectionMap.end(); i != e; ++i) {
+      const SectionRef &Section = i->first;
+      StringRef Name;
+      Section.getName(Name);
+      if (Name == "__eh_frame")
+        EHFrameSID = i->second;
+      else if (Name == "__text")
+        TextSID = i->second;
+      else if (Name == "__gcc_except_tab")
+        ExceptTabSID = i->second;
+      else
+        impl().finalizeSection(ObjImg, i->second, Section);
+    }
+    UnregisteredEHFrameSections.push_back(
+        EHFrameRelatedSections(EHFrameSID, TextSID, ExceptTabSID));
+  }
 };
 
 } // end namespace llvm
 
+#undef DEBUG_TYPE
+
 #endif