1 //===-- RuntimeDyld.h - Run-time dynamic linker for MC-JIT ------*- 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 // Interface for the runtime dynamic linker facilities of the MC-JIT. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_EXECUTIONENGINE_RUNTIMEDYLD_H 15 #define LLVM_EXECUTIONENGINE_RUNTIMEDYLD_H 16 17 #include "llvm/ADT/StringRef.h" 18 #include "llvm/ExecutionEngine/ObjectBuffer.h" 19 #include "llvm/ExecutionEngine/RTDyldMemoryManager.h" 20 #include "llvm/Support/Memory.h" 21 22 namespace llvm { 23 24 class RuntimeDyldImpl; 25 class ObjectImage; 26 27 class RuntimeDyld { 28 RuntimeDyld(const RuntimeDyld &) LLVM_DELETED_FUNCTION; 29 void operator=(const RuntimeDyld &) LLVM_DELETED_FUNCTION; 30 31 // RuntimeDyldImpl is the actual class. RuntimeDyld is just the public 32 // interface. 33 RuntimeDyldImpl *Dyld; 34 RTDyldMemoryManager *MM; 35 protected: 36 // Change the address associated with a section when resolving relocations. 37 // Any relocations already associated with the symbol will be re-resolved. 38 void reassignSectionAddress(unsigned SectionID, uint64_t Addr); 39 public: 40 RuntimeDyld(RTDyldMemoryManager *); 41 ~RuntimeDyld(); 42 43 /// Prepare the object contained in the input buffer for execution. 44 /// Ownership of the input buffer is transferred to the ObjectImage 45 /// instance returned from this function if successful. In the case of load 46 /// failure, the input buffer will be deleted. 47 ObjectImage *loadObject(ObjectBuffer *InputBuffer); 48 49 /// Get the address of our local copy of the symbol. This may or may not 50 /// be the address used for relocation (clients can copy the data around 51 /// and resolve relocatons based on where they put it). 52 void *getSymbolAddress(StringRef Name); 53 54 /// Get the address of the target copy of the symbol. This is the address 55 /// used for relocation. 56 uint64_t getSymbolLoadAddress(StringRef Name); 57 58 /// Resolve the relocations for all symbols we currently know about. 59 void resolveRelocations(); 60 61 /// Map a section to its target address space value. 62 /// Map the address of a JIT section as returned from the memory manager 63 /// to the address in the target process as the running code will see it. 64 /// This is the address which will be used for relocation resolution. 65 void mapSectionAddress(const void *LocalAddress, uint64_t TargetAddress); 66 67 StringRef getErrorString(); 68 69 StringRef getEHFrameSection(); 70 }; 71 72 } // end namespace llvm 73 74 #endif 75
