1 //===- RemoteTarget.cpp - LLVM Remote process JIT execution --------------===// 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 // Implementation of the RemoteTarget class which executes JITed code in a 11 // separate address range from where it was built. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "RemoteTarget.h" 16 #include "llvm/ADT/StringRef.h" 17 #include "llvm/Support/DataTypes.h" 18 #include "llvm/Support/Memory.h" 19 #include <stdlib.h> 20 #include <string> 21 using namespace llvm; 22 23 bool RemoteTarget::allocateSpace(size_t Size, unsigned Alignment, 24 uint64_t &Address) { 25 sys::MemoryBlock *Prev = Allocations.size() ? &Allocations.back() : NULL; 26 sys::MemoryBlock Mem = sys::Memory::AllocateRWX(Size, Prev, &ErrorMsg); 27 if (Mem.base() == NULL) 28 return true; 29 if ((uintptr_t)Mem.base() % Alignment) { 30 ErrorMsg = "unable to allocate sufficiently aligned memory"; 31 return true; 32 } 33 Address = reinterpret_cast<uint64_t>(Mem.base()); 34 return false; 35 } 36 37 bool RemoteTarget::loadData(uint64_t Address, const void *Data, size_t Size) { 38 memcpy ((void*)Address, Data, Size); 39 return false; 40 } 41 42 bool RemoteTarget::loadCode(uint64_t Address, const void *Data, size_t Size) { 43 memcpy ((void*)Address, Data, Size); 44 sys::MemoryBlock Mem((void*)Address, Size); 45 sys::Memory::setExecutable(Mem, &ErrorMsg); 46 return false; 47 } 48 49 bool RemoteTarget::executeCode(uint64_t Address, int &RetVal) { 50 int (*fn)(void) = (int(*)(void))Address; 51 RetVal = fn(); 52 return false; 53 } 54 55 void RemoteTarget::create() { 56 } 57 58 void RemoteTarget::stop() { 59 for (unsigned i = 0, e = Allocations.size(); i != e; ++i) 60 sys::Memory::ReleaseRWX(Allocations[i]); 61 } 62
