1 //===-- RuntimeDyld.h - Run-time dynamic linker for MC-JIT ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Interface for the runtime dynamic linker facilities of the MC-JIT.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_RUNTIME_DYLD_H
15 #define LLVM_RUNTIME_DYLD_H
17 #include "llvm/ADT/StringRef.h"
18 #include "llvm/Support/Memory.h"
22 class RuntimeDyldImpl;
25 // RuntimeDyld clients often want to handle the memory management of
26 // what gets placed where. For JIT clients, this is an abstraction layer
27 // over the JITMemoryManager, which references objects by their source
28 // representations in LLVM IR.
29 // FIXME: As the RuntimeDyld fills out, additional routines will be needed
30 // for the varying types of objects to be allocated.
31 class RTDyldMemoryManager {
32 RTDyldMemoryManager(const RTDyldMemoryManager&); // DO NOT IMPLEMENT
33 void operator=(const RTDyldMemoryManager&); // DO NOT IMPLEMENT
35 RTDyldMemoryManager() {}
37 // Allocate ActualSize bytes, or more, for the named function. Return
38 // a pointer to the allocated memory and update Size to reflect how much
39 // memory was acutally allocated.
40 virtual uint64_t startFunctionBody(const char *Name, uintptr_t &Size) = 0;
42 // Mark the end of the function, including how much of the allocated
43 // memory was actually used.
44 virtual void endFunctionBody(const char *Name, uint64_t FunctionStart,
45 uint64_t FunctionEnd) = 0;
49 RuntimeDyld(const RuntimeDyld &); // DO NOT IMPLEMENT
50 void operator=(const RuntimeDyld &); // DO NOT IMPLEMENT
52 // RuntimeDyldImpl is the actual class. RuntimeDyld is just the public
54 RuntimeDyldImpl *Dyld;
56 RuntimeDyld(RTDyldMemoryManager*);
59 bool loadObject(MemoryBuffer *InputBuffer);
60 uint64_t getSymbolAddress(StringRef Name);
61 void reassignSymbolAddress(StringRef Name, uint64_t Addr);
62 // FIXME: Should be parameterized to get the memory block associated with
63 // a particular loaded object.
64 sys::MemoryBlock getMemoryBlock();
65 StringRef getErrorString();
68 } // end namespace llvm