mirror of
https://github.com/NationalSecurityAgency/ghidra.git
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506 lines
20 KiB
C++
506 lines
20 KiB
C++
/* ###
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* IP: GHIDRA
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/// \file opbehavior.hh
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/// \brief Classes for describing the behavior of individual p-code operations
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#ifndef __CPUI_OPBEHAVIOR__
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#define __CPUI_OPBEHAVIOR__
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#include "error.hh"
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#include "opcodes.hh"
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class Translate; // Forward declaration
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/// This exception is thrown when emulation evaluation of an operator fails for some reason.
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/// This can be thrown for either forward or reverse emulation
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struct EvaluationError : public LowlevelError {
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EvaluationError(const string &s) : LowlevelError(s) {} ///< Initialize the error with an explanatory string
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};
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/// \brief Class encapsulating the action/behavior of specific pcode opcodes
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///
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/// At the lowest level, a pcode op is one of a small set of opcodes that
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/// operate on varnodes (address space, offset, size). Classes derived from
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/// this base class encapsulate this basic behavior for each possible opcode.
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/// These classes describe the most basic behaviors and include:
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/// * uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb int2)
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/// * uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1)
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/// * uintb recoverInputBinary(int4 slot,int4 sizeout,uintb out,int4 sizein,uintb in)
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/// * uintb recoverInputUnary(int4 sizeout,uintb out,int4 sizein)
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class OpBehavior {
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OpCode opcode; ///< the internal enumeration for pcode types
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bool isunary; ///< true= use unary interfaces, false = use binary
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bool isspecial; ///< Is op not a normal unary or binary op
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public:
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OpBehavior(OpCode opc,bool isun); ///< A behavior constructor
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OpBehavior(OpCode opc,bool isun,bool isspec); ///< A special behavior constructor
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virtual ~OpBehavior(void) {}
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/// \brief Get the opcode for this pcode operation
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OpCode getOpcode(void) const;
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/// \brief Check if this is a special operator
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bool isSpecial(void) const;
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/// \brief Check if operator is unary
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bool isUnary(void) const;
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/// \brief Emulate the unary op-code on an input value
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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/// \brief Emulate the binary op-code on input values
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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/// \brief Reverse the binary op-code operation, recovering an input value
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virtual uintb recoverInputBinary(int4 slot,int4 sizeout,uintb out,int4 sizein,uintb in) const;
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/// \brief Reverse the unary op-code operation, recovering the input value
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virtual uintb recoverInputUnary(int4 sizeout,uintb out,int4 sizein) const;
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static void registerInstructions(vector<OpBehavior *> &inst,const Translate *trans); ///< Build all pcode behaviors
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};
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/// This kind of OpBehavior is associated with a particular opcode and is either unary or binary
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/// \param opc is the opcode of the behavior
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/// \param isun is \b true if the behavior is unary, \b false if binary
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inline OpBehavior::OpBehavior(OpCode opc,bool isun)
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{
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opcode = opc;
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isunary = isun;
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isspecial = false;
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}
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/// This kind of OpBehavior can be set to \b special, if it neither unary or binary.
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/// \param opc is the opcode of the behavior
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/// \param isun is \b true if the behavior is unary
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/// \param isspec is \b true if the behavior is neither unary or binary
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inline OpBehavior::OpBehavior(OpCode opc,bool isun,bool isspec)
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{
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opcode = opc;
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isunary = isun;
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isspecial = isspec;
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}
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/// There is an internal enumeration value for each type of pcode operation.
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/// This routine returns that value.
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/// \return the opcode value
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inline OpCode OpBehavior::getOpcode(void) const {
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return opcode;
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}
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/// If this function returns false, the operation is a normal unary or binary operation
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/// which can be evaluated calling evaluateBinary() or evaluateUnary().
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/// Otherwise, the operation requires special handling to emulate properly
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inline bool OpBehavior::isSpecial(void) const {
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return isspecial;
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}
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/// The operated can either be evaluated as unary or binary
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/// \return \b true if the operator is unary
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inline bool OpBehavior::isUnary(void) const {
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return isunary;
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}
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// A class for each opcode
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/// CPUI_COPY behavior
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class OpBehaviorCopy : public OpBehavior {
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public:
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OpBehaviorCopy(void) : OpBehavior(CPUI_COPY,true) {} ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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virtual uintb recoverInputUnary(int4 sizeout,uintb out,int4 sizein) const;
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};
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/// CPUI_INT_EQUAL behavior
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class OpBehaviorEqual : public OpBehavior {
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public:
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OpBehaviorEqual(void) : OpBehavior(CPUI_INT_EQUAL,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_NOTEQUAL behavior
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class OpBehaviorNotEqual : public OpBehavior {
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public:
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OpBehaviorNotEqual(void) : OpBehavior(CPUI_INT_NOTEQUAL,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_SLESS behavior
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class OpBehaviorIntSless : public OpBehavior {
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public:
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OpBehaviorIntSless(void) : OpBehavior(CPUI_INT_SLESS,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_SLESSEQUAL behavior
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class OpBehaviorIntSlessEqual : public OpBehavior {
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public:
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OpBehaviorIntSlessEqual(void) : OpBehavior(CPUI_INT_SLESSEQUAL,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_LESS behavior
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class OpBehaviorIntLess : public OpBehavior {
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public:
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OpBehaviorIntLess(void) : OpBehavior(CPUI_INT_LESS,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_LESSEQUAL behavior
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class OpBehaviorIntLessEqual : public OpBehavior {
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public:
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OpBehaviorIntLessEqual(void): OpBehavior(CPUI_INT_LESSEQUAL,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_ZEXT behavior
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class OpBehaviorIntZext : public OpBehavior {
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public:
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OpBehaviorIntZext(void): OpBehavior(CPUI_INT_ZEXT,true) {} ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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virtual uintb recoverInputUnary(int4 sizeout,uintb out,int4 sizein) const;
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};
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/// CPUI_INT_SEXT behavior
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class OpBehaviorIntSext : public OpBehavior {
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public:
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OpBehaviorIntSext(void): OpBehavior(CPUI_INT_SEXT,true) {} ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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virtual uintb recoverInputUnary(int4 sizeout,uintb out,int4 sizein) const;
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};
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/// CPUI_INT_ADD behavior
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class OpBehaviorIntAdd : public OpBehavior {
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public:
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OpBehaviorIntAdd(void): OpBehavior(CPUI_INT_ADD,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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virtual uintb recoverInputBinary(int4 slot,int4 sizeout,uintb out,int4 sizein,uintb in) const;
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};
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/// CPUI_INT_SUB behavior
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class OpBehaviorIntSub : public OpBehavior {
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public:
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OpBehaviorIntSub(void): OpBehavior(CPUI_INT_SUB,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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virtual uintb recoverInputBinary(int4 slot,int4 sizeout,uintb out,int4 sizein,uintb in) const;
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};
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/// CPUI_INT_CARRY behavior
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class OpBehaviorIntCarry : public OpBehavior {
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public:
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OpBehaviorIntCarry(void): OpBehavior(CPUI_INT_CARRY,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_SCARRY behavior
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class OpBehaviorIntScarry : public OpBehavior {
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public:
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OpBehaviorIntScarry(void): OpBehavior(CPUI_INT_SCARRY,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_SBORROW behavior
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class OpBehaviorIntSborrow : public OpBehavior {
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public:
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OpBehaviorIntSborrow(void): OpBehavior(CPUI_INT_SBORROW,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_2COMP behavior
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class OpBehaviorInt2Comp : public OpBehavior {
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public:
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OpBehaviorInt2Comp(void): OpBehavior(CPUI_INT_2COMP,true) {} ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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};
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/// CPUI_INT_NEGATE behavior
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class OpBehaviorIntNegate : public OpBehavior {
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public:
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OpBehaviorIntNegate(void): OpBehavior(CPUI_INT_NEGATE,true) {} ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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};
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/// CPUI_INT_XOR behavior
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class OpBehaviorIntXor : public OpBehavior {
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public:
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OpBehaviorIntXor(void): OpBehavior(CPUI_INT_XOR,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_AND behavior
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class OpBehaviorIntAnd : public OpBehavior {
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public:
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OpBehaviorIntAnd(void): OpBehavior(CPUI_INT_AND,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_OR behavior
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class OpBehaviorIntOr : public OpBehavior {
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public:
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OpBehaviorIntOr(void): OpBehavior(CPUI_INT_OR,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_LEFT behavior
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class OpBehaviorIntLeft : public OpBehavior {
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public:
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OpBehaviorIntLeft(void): OpBehavior(CPUI_INT_LEFT,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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virtual uintb recoverInputBinary(int4 slot,int4 sizeout,uintb out,int4 sizein,uintb in) const;
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};
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/// CPUI_INT_RIGHT behavior
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class OpBehaviorIntRight : public OpBehavior {
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public:
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OpBehaviorIntRight(void): OpBehavior(CPUI_INT_RIGHT,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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virtual uintb recoverInputBinary(int4 slot,int4 sizeout,uintb out,int4 sizein,uintb in) const;
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};
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/// CPUI_INT_SRIGHT behavior
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class OpBehaviorIntSright : public OpBehavior {
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public:
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OpBehaviorIntSright(void): OpBehavior(CPUI_INT_SRIGHT,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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virtual uintb recoverInputBinary(int4 slot,int4 sizeout,uintb out,int4 sizein,uintb in) const;
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};
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/// CPUI_INT_MULT behavior
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class OpBehaviorIntMult : public OpBehavior {
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public:
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OpBehaviorIntMult(void): OpBehavior(CPUI_INT_MULT,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_DIV behavior
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class OpBehaviorIntDiv : public OpBehavior {
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public:
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OpBehaviorIntDiv(void): OpBehavior(CPUI_INT_DIV,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_SDIV behavior
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class OpBehaviorIntSdiv : public OpBehavior {
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public:
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OpBehaviorIntSdiv(void): OpBehavior(CPUI_INT_SDIV,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_REM behavior
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class OpBehaviorIntRem : public OpBehavior {
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public:
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OpBehaviorIntRem(void): OpBehavior(CPUI_INT_REM,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_INT_SREM behavior
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class OpBehaviorIntSrem : public OpBehavior {
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public:
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OpBehaviorIntSrem(void): OpBehavior(CPUI_INT_SREM,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_BOOL_NEGATE behavior
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class OpBehaviorBoolNegate : public OpBehavior {
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public:
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OpBehaviorBoolNegate(void): OpBehavior(CPUI_BOOL_NEGATE,true) {} ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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};
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/// CPUI_BOOL_XOR behavior
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class OpBehaviorBoolXor : public OpBehavior {
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public:
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OpBehaviorBoolXor(void): OpBehavior(CPUI_BOOL_XOR,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_BOOL_AND behavior
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class OpBehaviorBoolAnd : public OpBehavior {
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public:
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OpBehaviorBoolAnd(void): OpBehavior(CPUI_BOOL_AND,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_BOOL_OR behavior
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class OpBehaviorBoolOr : public OpBehavior {
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public:
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OpBehaviorBoolOr(void): OpBehavior(CPUI_BOOL_OR,false) {} ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_FLOAT_EQUAL behavior
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class OpBehaviorFloatEqual : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatEqual(const Translate *trans): OpBehavior(CPUI_FLOAT_EQUAL,false) { translate = trans; } ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_FLOAT_NOTEQUAL behavior
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class OpBehaviorFloatNotEqual : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatNotEqual(const Translate *trans): OpBehavior(CPUI_FLOAT_NOTEQUAL,false) { translate = trans; } ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_FLOAT_LESS behavior
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class OpBehaviorFloatLess : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatLess(const Translate *trans) : OpBehavior(CPUI_FLOAT_LESS,false) { translate = trans; } ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_FLOAT_LESSEQUAL behavior
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class OpBehaviorFloatLessEqual : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatLessEqual(const Translate *trans) : OpBehavior(CPUI_FLOAT_LESSEQUAL,false) { translate = trans; } ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_FLOAT_NAN behavior
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class OpBehaviorFloatNan : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatNan(const Translate *trans) : OpBehavior(CPUI_FLOAT_NAN,true) { translate = trans; } ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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};
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/// CPUI_FLOAT_ADD behavior
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class OpBehaviorFloatAdd : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatAdd(const Translate *trans) : OpBehavior(CPUI_FLOAT_ADD,false) { translate = trans; } ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_FLOAT_DIV behavior
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class OpBehaviorFloatDiv : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatDiv(const Translate *trans) : OpBehavior(CPUI_FLOAT_DIV,false) { translate = trans; } ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_FLOAT_MULT behavior
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class OpBehaviorFloatMult : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatMult(const Translate *trans) : OpBehavior(CPUI_FLOAT_MULT,false) { translate = trans; } ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_FLOAT_SUB behavior
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class OpBehaviorFloatSub : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatSub(const Translate *trans) : OpBehavior(CPUI_FLOAT_SUB,false) { translate = trans; } ///< Constructor
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virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
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};
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/// CPUI_FLOAT_NEG behavior
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class OpBehaviorFloatNeg : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatNeg(const Translate *trans) : OpBehavior(CPUI_FLOAT_NEG,true) { translate = trans; } ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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};
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/// CPUI_FLOAT_ABS behavior
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class OpBehaviorFloatAbs : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatAbs(const Translate *trans) : OpBehavior(CPUI_FLOAT_ABS,true) { translate = trans; } ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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};
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/// CPUI_FLOAT_SQRT behavior
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class OpBehaviorFloatSqrt : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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public:
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OpBehaviorFloatSqrt(const Translate *trans) : OpBehavior(CPUI_FLOAT_SQRT,true) { translate = trans; } ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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};
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/// CPUI_FLOAT_INT2FLOAT behavior
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class OpBehaviorFloatInt2Float : public OpBehavior {
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const Translate *translate; ///< Translate object for recovering float format
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|
public:
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OpBehaviorFloatInt2Float(const Translate *trans) : OpBehavior(CPUI_FLOAT_INT2FLOAT,true) { translate = trans; } ///< Constructor
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virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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};
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|
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/// CPUI_FLOAT_FLOAT2FLOAT behavior
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class OpBehaviorFloatFloat2Float : public OpBehavior {
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|
const Translate *translate; ///< Translate object for recovering float format
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|
public:
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|
OpBehaviorFloatFloat2Float(const Translate *trans) : OpBehavior(CPUI_FLOAT_FLOAT2FLOAT,true) { translate = trans; } ///< Constructor
|
|
virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
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|
};
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|
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/// CPUI_FLOAT_TRUNC behavior
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|
class OpBehaviorFloatTrunc : public OpBehavior {
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|
const Translate *translate; ///< Translate object for recovering float format
|
|
public:
|
|
OpBehaviorFloatTrunc(const Translate *trans) : OpBehavior(CPUI_FLOAT_TRUNC,true) { translate = trans; } ///< Constructor
|
|
virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
|
|
};
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|
|
|
/// CPUI_FLOAT_CEIL behavior
|
|
class OpBehaviorFloatCeil : public OpBehavior {
|
|
const Translate *translate; ///< Translate object for recovering float format
|
|
public:
|
|
OpBehaviorFloatCeil(const Translate *trans) : OpBehavior(CPUI_FLOAT_CEIL,true) { translate = trans; } ///< Constructor
|
|
virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
|
|
};
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|
|
|
/// CPUI_FLOAT_FLOOR behavior
|
|
class OpBehaviorFloatFloor : public OpBehavior {
|
|
const Translate *translate; ///< Translate object for recovering float format
|
|
public:
|
|
OpBehaviorFloatFloor(const Translate *trans) : OpBehavior(CPUI_FLOAT_FLOOR,true) { translate = trans; } ///< Constructor
|
|
virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
|
|
};
|
|
|
|
/// CPUI_FLOAT_ROUND behavior
|
|
class OpBehaviorFloatRound : public OpBehavior {
|
|
const Translate *translate; ///< Translate object for recovering float format
|
|
public:
|
|
OpBehaviorFloatRound(const Translate *trans) : OpBehavior(CPUI_FLOAT_ROUND,true) { translate = trans; } ///< Constructor
|
|
virtual uintb evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const;
|
|
};
|
|
|
|
/// CPUI_PIECE behavior
|
|
class OpBehaviorPiece : public OpBehavior {
|
|
public:
|
|
OpBehaviorPiece(void) : OpBehavior(CPUI_PIECE,false) {} ///< Constructor
|
|
virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
|
|
};
|
|
|
|
/// CPUI_SUBPIECE behavior
|
|
class OpBehaviorSubpiece : public OpBehavior {
|
|
public:
|
|
OpBehaviorSubpiece(void) : OpBehavior(CPUI_SUBPIECE,false) {} ///< Constructor
|
|
virtual uintb evaluateBinary(int4 sizeout,int4 sizein,uintb in1,uintb in2) const;
|
|
};
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|
|
|
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#endif
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