lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldCOFFX86_64.h

   1 //===-- RuntimeDyldCOFFX86_64.h --- COFF/X86_64 specific code ---*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // COFF x86_x64 support for MC-JIT runtime dynamic linker.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_TARGETS_RUNTIMEDYLDCOFF86_64_H
  15 #define LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_TARGETS_RUNTIMEDYLDCOFF86_64_H
  16
  17 #include "llvm/Object/COFF.h"
  18 #include "llvm/Support/COFF.h"
  19 #include "../RuntimeDyldCOFF.h"
  20
  21 using namespace llvm;
  22
  23 namespace llvm {
  24
  25 class RuntimeDyldCOFFX86_64 : public RuntimeDyldCOFF {
  26
  27 private:
  28   // When a module is loaded we save the SectionID of the unwind
  29   // sections in a table until we receive a request to register all
  30   // unregisteredEH frame sections with the memory manager.
  31   SmallVector<SID, 2> UnregisteredEHFrameSections;
  32   SmallVector<SID, 2> RegisteredEHFrameSections;
  33
  34 public:
  35   RuntimeDyldCOFFX86_64(RTDyldMemoryManager *MM) : RuntimeDyldCOFF(MM) {}
  36
  37   unsigned getMaxStubSize() override {
  38     return 6; // 2-byte jmp instruction + 32-bit relative address
  39   }
  40
  41   void resolveRelocation(const RelocationEntry &RE, uint64_t Value) override;
  42
  43   relocation_iterator processRelocationRef(unsigned SectionID,
  44                                            relocation_iterator RelI,
  45                                            const ObjectFile &Obj,
  46                                            ObjSectionToIDMap &ObjSectionToID,
  47                                            StubMap &Stubs) override;
  48
  49   unsigned getStubAlignment() override { return 1; }
  50   void registerEHFrames() override;
  51   void deregisterEHFrames() override;
  52   void finalizeLoad(const ObjectFile &Obj,
  53                     ObjSectionToIDMap &SectionMap) override;
  54 };
  55
  56 } // end namespace llvm
  57
  58 #undef DEBUG_TYPE
  59
  60 #endif