1706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach//===- RemoteTarget.cpp - LLVM Remote process JIT execution --------------===// 2706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// 3706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// The LLVM Compiler Infrastructure 4706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// 5706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// This file is distributed under the University of Illinois Open Source 6706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// License. See LICENSE.TXT for details. 7706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// 8706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach//===----------------------------------------------------------------------===// 9706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// 10706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// Implementation of the RemoteTarget class which executes JITed code in a 11706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// separate address range from where it was built. 12706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach// 13706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach//===----------------------------------------------------------------------===// 14706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach 15706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach#include "RemoteTarget.h" 16dbf545719a22bf03403c1d0137ae0f5726f36de3Craig Topper#include "llvm/ADT/StringRef.h" 17dbf545719a22bf03403c1d0137ae0f5726f36de3Craig Topper#include "llvm/Support/DataTypes.h" 18dbf545719a22bf03403c1d0137ae0f5726f36de3Craig Topper#include "llvm/Support/Memory.h" 19706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach#include <stdlib.h> 20706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach#include <string> 21706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbachusing namespace llvm; 22706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach 23706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbachbool RemoteTarget::allocateSpace(size_t Size, unsigned Alignment, 24706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach uint64_t &Address) { 25706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach sys::MemoryBlock *Prev = Allocations.size() ? &Allocations.back() : NULL; 26706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach sys::MemoryBlock Mem = sys::Memory::AllocateRWX(Size, Prev, &ErrorMsg); 27706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach if (Mem.base() == NULL) 28706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach return true; 29706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach if ((uintptr_t)Mem.base() % Alignment) { 30706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach ErrorMsg = "unable to allocate sufficiently aligned memory"; 31706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach return true; 32706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach } 33706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach Address = reinterpret_cast<uint64_t>(Mem.base()); 34706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach return false; 35706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach} 36706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach 37706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbachbool RemoteTarget::loadData(uint64_t Address, const void *Data, size_t Size) { 38706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach memcpy ((void*)Address, Data, Size); 39706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach return false; 40706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach} 41706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach 42706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbachbool RemoteTarget::loadCode(uint64_t Address, const void *Data, size_t Size) { 43706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach memcpy ((void*)Address, Data, Size); 442932284f045005bc3ed850f9c42524fadf3ae3d8Andrew Kaylor sys::MemoryBlock Mem((void*)Address, Size); 452932284f045005bc3ed850f9c42524fadf3ae3d8Andrew Kaylor sys::Memory::setExecutable(Mem, &ErrorMsg); 46706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach return false; 47706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach} 48706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach 49706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbachbool RemoteTarget::executeCode(uint64_t Address, int &RetVal) { 50706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach int (*fn)(void) = (int(*)(void))Address; 51706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach RetVal = fn(); 52706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach return false; 53706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach} 54706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach 55706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbachvoid RemoteTarget::create() { 56706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach} 57706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach 58706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbachvoid RemoteTarget::stop() { 59706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach for (unsigned i = 0, e = Allocations.size(); i != e; ++i) 60706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach sys::Memory::ReleaseRWX(Allocations[i]); 61706f03a35db7029b2dbd2925552eb0d0472dcbb4Jim Grosbach} 62