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First pass at LaneDivide transformer

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caheckman 2019-10-17 13:06:40 -04:00
parent 5ef7347ca3
commit 31eab44f54
2 changed files with 466 additions and 0 deletions
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28
Ghidra/Features/Decompiler/src/decompile/cpp/subflow.hh
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@ -154,4 +154,32 @@ public:
bool doTrace(void); ///< Trace logical value as far as possible
};
class LaneDivide : public TransformManager {
/// \brief Description of a large Varnode that needs to be traced (in the worklist)
class WorkNode {
friend class LaneDivide;
Varnode *vn; ///< The underlying Varnode with lanes
TransformVar *lanes; ///< Lane placeholders for underyling Varnode
int4 numLanes; ///< Number of lanes in the particular Varnode
int4 skipLanes; ///< Number of lanes to skip in the global description
};
LaneDescription description; ///< Global description of lanes that need to be split
vector<WorkNode> workList; ///< List of Varnodes still left to trace
TransformVar *setReplacement(Varnode *vn,int4 numLanes,int4 skipLanes);
void buildUnaryOp(OpCode opc,PcodeOp *op,TransformVar *inVars,TransformVar *outVars,int4 numLanes);
void buildBinaryOp(OpCode opc,PcodeOp *op,TransformVar *in0Vars,TransformVar *in1Vars,TransformVar *outVars,int4 numLanes);
bool buildPiece(PcodeOp *op,TransformVar *outVars,int4 numLanes,int4 skipLanes);
bool buildMultiequal(PcodeOp *op,TransformVar *outVars,int4 numLanes,int4 skipLanes);
bool buildStore(PcodeOp *op,int4 numLanes,int4 skipLanes);
bool buildLoad(PcodeOp *op,TransformVar *outVars,int4 numLanes,int4 skipLanes);
bool traceForward(TransformVar *rvn,int4 numLanes,int4 skipLanes);
bool traceBackward(TransformVar *rvn,int4 numLanes,int4 skipLanes);
bool processNextWork(void); ///< Process the next Varnode on the work list
public:
LaneDivide(Funcdata *f,Varnode *root,const LaneDescription &desc); ///< Constructor
bool doTrace(void); ///< Trace lanes as far as possible from the root Varnode
};
#endif