emulateutil.hh

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/* ###
 * IP: GHIDRA
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef __CPUI_EMUTREE__
#define __CPUI_EMUTREE__

#include "emulate.hh"
#include "op.hh"

class EmulatePcodeOp : public Emulate {
protected:
  Architecture *glb;        
  PcodeOp *currentOp;       
  PcodeOp *lastOp;      

  virtual uintb getLoadImageValue(AddrSpace *spc,uintb offset,int4 sz) const;
  virtual void executeUnary(void);
  virtual void executeBinary(void);
  virtual void executeLoad(void);
  virtual void executeStore(void);
//  virtual void executeBranch(void)=0;
  virtual bool executeCbranch(void);
//  virtual void executeBranchind(void)=0;
//  virtual void executeCall(void)=0;
//  virtual void executeCallind(void)=0;
//  virtual void executeCallother(void)=0;
  virtual void executeMultiequal(void);
  virtual void executeIndirect(void);
  virtual void executeSegmentOp(void);
  virtual void executeCpoolRef(void);
  virtual void executeNew(void);
//  virtual void fallthruOp(void)=0;
public:
  EmulatePcodeOp(Architecture *g);      

  void setCurrentOp(PcodeOp *op) { currentOp = op; currentBehave = op->getOpcode()->getBehavior(); }
  virtual Address getExecuteAddress(void) const { return currentOp->getAddr(); }

  virtual void setVarnodeValue(Varnode *vn,uintb val)=0;

  virtual uintb getVarnodeValue(Varnode *vn) const=0;
};

class EmulateSnippet : public Emulate {
  Architecture *glb;            
  vector<PcodeOpRaw *> opList;      
  vector<VarnodeData *> varList;    
  map<uintb,uintb> tempValues;      
  PcodeOpRaw *currentOp;        
  int4 pos;             

  uintb getLoadImageValue(AddrSpace *spc,uintb offset,int4 sz) const;
  virtual void executeUnary(void);
  virtual void executeBinary(void);
  virtual void executeLoad(void);
  virtual void executeStore(void);
  virtual void executeBranch(void);
  virtual bool executeCbranch(void);
  virtual void executeBranchind(void);
  virtual void executeCall(void);
  virtual void executeCallind(void);
  virtual void executeCallother(void);
  virtual void executeMultiequal(void);
  virtual void executeIndirect(void);
  virtual void executeSegmentOp(void);
  virtual void executeCpoolRef(void);
  virtual void executeNew(void);
  virtual void fallthruOp(void);
public:
  EmulateSnippet(Architecture *g) { glb = g; pos = 0; currentOp = (PcodeOpRaw *)0; }    
  virtual ~EmulateSnippet(void);                            
  virtual void setExecuteAddress(const Address &addr) { setCurrentOp(0); }
  virtual Address getExecuteAddress(void) const { return currentOp->getAddr(); }
  Architecture *getArch(void) const { return glb; }             

  void resetMemory(void) { tempValues.clear(); setCurrentOp(0); emu_halted = false; }

  PcodeEmit *buildEmitter(const vector<OpBehavior *> &inst,uintb uniqReserve);
  bool checkForLegalCode(void) const;

  void setCurrentOp(int4 i) { pos = i; currentOp = opList[i]; currentBehave = currentOp->getBehavior(); }

  void setVarnodeValue(uintb offset,uintb val) { tempValues[offset] = val; }
  uintb getVarnodeValue(VarnodeData *vn) const;
  uintb getTempValue(uintb offset) const;
};

#endif