Description

Defines RISC operators for the TaintSemantics domain.

These RISC operators depend on functionality introduced into the SValue class hierarchy at the TaintSemantics::SValue level. Therefore, the prototypical value supplied to the constructor or present in the supplied state object must have a dynamic type which is a TaintSemantics::SValue.

Each RISC operator should return a newly allocated semantic value so that the caller can adjust taintedness for the result without affecting any of the inputs. For example, a no-op that returns its argument should be implemented like this:

BaseSemantics::SValuePtr noop(const BaseSemantics::SValuePtr &arg) {
    return arg->copy();     //correct
    return arg;             //incorrect
}

Definition at line 231 of file TaintSemantics.h.

#include <Rose/BinaryAnalysis/InstructionSemantics/TaintSemantics.h>

Inheritance diagram for Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators:

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Collaboration diagram for Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators:

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Public Types
using	Super = SymbolicSemantics::RiscOperators
	Base type.

using	Ptr = RiscOperatorsPtr
	Shared-ownership pointer.

Public Types inherited from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators
using	Super = BaseSemantics::RiscOperators
	Base type.

using	Ptr = RiscOperatorsPtr
	Shared-ownership pointer.

Public Types inherited from Rose::BinaryAnalysis::InstructionSemantics::BaseSemantics::RiscOperators
enum class	IteStatus { NEITHER , A , B , BOTH }
	Status for iteWithStatus operation. More...

using	Ptr = RiscOperatorsPtr
	Shared-ownership pointer.

Public Member Functions
virtual BaseSemantics::RiscOperatorsPtr	create (const BaseSemantics::SValuePtr &protoval, const SmtSolverPtr &solver=SmtSolverPtr()) const override
	Virtual allocating constructor.

virtual BaseSemantics::RiscOperatorsPtr	create (const BaseSemantics::StatePtr &, const SmtSolverPtr &solver=SmtSolverPtr()) const override
	Virtual allocating constructor.

virtual BaseSemantics::SValuePtr	and_ (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Computes bit-wise AND of two values.

virtual BaseSemantics::SValuePtr	or_ (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Computes bit-wise OR of two values.

virtual BaseSemantics::SValuePtr	xor_ (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Computes bit-wise XOR of two values.

virtual BaseSemantics::SValuePtr	invert (const BaseSemantics::SValuePtr &a_) override
	One's complement.

virtual BaseSemantics::SValuePtr	extract (const BaseSemantics::SValuePtr &a_, size_t begin_bit, size_t end_bit) override
	Extracts bits from a value.

virtual BaseSemantics::SValuePtr	concat (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Concatenates the bits of two values.

virtual BaseSemantics::SValuePtr	leastSignificantSetBit (const BaseSemantics::SValuePtr &a_) override
	Returns position of least significant set bit; zero when no bits are set.

virtual BaseSemantics::SValuePtr	mostSignificantSetBit (const BaseSemantics::SValuePtr &a_) override
	Returns position of most significant set bit; zero when no bits are set.

virtual BaseSemantics::SValuePtr	rotateLeft (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) override
	Rotate bits to the left.

virtual BaseSemantics::SValuePtr	rotateRight (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) override
	Rotate bits to the right.

virtual BaseSemantics::SValuePtr	shiftLeft (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) override
	Returns arg shifted left.

virtual BaseSemantics::SValuePtr	shiftRight (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) override
	Returns arg shifted right logically (no sign bit).

virtual BaseSemantics::SValuePtr	shiftRightArithmetic (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) override
	Returns arg shifted right arithmetically (with sign bit).

virtual BaseSemantics::SValuePtr	equalToZero (const BaseSemantics::SValuePtr &a_) override
	Determines whether a value is equal to zero.

virtual BaseSemantics::SValuePtr	iteWithStatus (const BaseSemantics::SValuePtr &sel_, const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_, IteStatus &) override
	If-then-else with status.

virtual BaseSemantics::SValuePtr	unsignedExtend (const BaseSemantics::SValuePtr &a_, size_t new_width) override
	Extend (or shrink) operand `a` so it is `nbits` wide by adding or removing high-order bits.

virtual BaseSemantics::SValuePtr	signExtend (const BaseSemantics::SValuePtr &a_, size_t new_width) override
	Sign extends a value.

virtual BaseSemantics::SValuePtr	add (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Adds two integers of equal size.

virtual BaseSemantics::SValuePtr	addWithCarries (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_, const BaseSemantics::SValuePtr &c_, BaseSemantics::SValuePtr &carry_out) override
	Add two values of equal size and a carry bit.

virtual BaseSemantics::SValuePtr	negate (const BaseSemantics::SValuePtr &a_) override
	Two's complement.

virtual BaseSemantics::SValuePtr	signedDivide (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Divides two signed values.

virtual BaseSemantics::SValuePtr	signedModulo (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Calculates modulo with signed values.

virtual BaseSemantics::SValuePtr	signedMultiply (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Multiplies two signed values.

virtual BaseSemantics::SValuePtr	unsignedDivide (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Divides two unsigned values.

virtual BaseSemantics::SValuePtr	unsignedModulo (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Calculates modulo with unsigned values.

virtual BaseSemantics::SValuePtr	unsignedMultiply (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) override
	Multiply two unsigned values.

virtual BaseSemantics::SValuePtr	fpConvert (const BaseSemantics::SValuePtr &a, SgAsmFloatType aType, SgAsmFloatType retType) override
	Convert from one floating-point type to another.

virtual BaseSemantics::SValuePtr	reinterpret (const BaseSemantics::SValuePtr &, SgAsmType *) override
	Reinterpret an expression as a different type.

Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators
virtual BaseSemantics::SValuePtr	boolean_ (bool b) override
	Returns a Boolean value.

virtual BaseSemantics::SValuePtr	number_ (size_t nbits, uint64_t value) override
	Returns a number of the specified bit width.

SValuePtr	svalueExpr (const ExprPtr &expr, const InsnSet &defs=InsnSet())

bool	getset_omit_cur_insn (bool b)

virtual void	substitute (const SValuePtr &from, const SValuePtr &to)
	Substitute all occurrences of `from` with `to` in the current state.

virtual BaseSemantics::SValuePtr	filterResult (const BaseSemantics::SValuePtr &)
	Filters results from RISC operators.

virtual SymbolicExpression::Type	sgTypeToSymbolicType (SgAsmType *)
	Convert a SgAsmType to a symbolic type.

virtual void	interrupt (int majr, int minr) override
	Unconditionally raise an interrupt.

virtual BaseSemantics::SValuePtr	readRegister (RegisterDescriptor reg, const BaseSemantics::SValuePtr &dflt) override
	Reads a value from a register.

virtual BaseSemantics::SValuePtr	peekRegister (RegisterDescriptor reg, const BaseSemantics::SValuePtr &dflt) override
	Obtain a register value without side effects.

virtual void	writeRegister (RegisterDescriptor reg, const BaseSemantics::SValuePtr &a_) override
	Writes a value to a register.

virtual BaseSemantics::SValuePtr	readMemory (RegisterDescriptor segreg, const BaseSemantics::SValuePtr &addr, const BaseSemantics::SValuePtr &dflt, const BaseSemantics::SValuePtr &cond) override
	Reads a value from memory.

virtual BaseSemantics::SValuePtr	peekMemory (RegisterDescriptor segreg, const BaseSemantics::SValuePtr &addr, const BaseSemantics::SValuePtr &dflt) override
	Read memory without side effects.

virtual void	writeMemory (RegisterDescriptor segreg, const BaseSemantics::SValuePtr &addr, const BaseSemantics::SValuePtr &data, const BaseSemantics::SValuePtr &cond) override
	Writes a value to memory.

BaseSemantics::SValuePtr	readOrPeekMemory (RegisterDescriptor segreg, const BaseSemantics::SValuePtr &addr, const BaseSemantics::SValuePtr &dflt, AllowSideEffects::Flag)

void	computingDefiners (DefinersMode m)
	Property: Track which instructions define a semantic value.

DefinersMode	computingDefiners () const
	Property: Track which instructions define a semantic value.

void	computingMemoryWriters (WritersMode m)
	Property: Track which instructions write to each memory location.

WritersMode	computingMemoryWriters () const
	Property: Track which instructions write to each memory location.

void	computingRegisterWriters (WritersMode m)
	Property: Track latest writer to each register.

WritersMode	computingRegisterWriters () const
	Property: Track latest writer to each register.

void	trimThreshold (uint64_t n)
	Property: Maximum size of expressions.

uint64_t	trimThreshold () const
	Property: Maximum size of expressions.

size_t	nTrimmed () const
	Property: Number of symbolic expressions trimmed.

void	nTrimmed (size_t n)
	Property: Number of symbolic expressions trimmed.

bool	reinterpretMemoryReads () const
	Property: Reinterpret data as unsigned integers when reading from memory or registers.

void	reinterpretMemoryReads (bool b)
	Property: Reinterpret data as unsigned integers when reading from memory or registers.

bool	reinterpretRegisterReads () const
	Property: Reinterpret data as unsigned integers when reading from memory or registers.

void	reinterpretRegisterReads (bool b)
	Property: Reinterpret data as unsigned integers when reading from memory or registers.

Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics::BaseSemantics::RiscOperators
virtual SValuePtr	protoval () const
	Property: Prototypical semantic value.

virtual void	hash (Combinatorics::Hasher &)
	Compute hash of current state.

virtual void	startInstruction (SgAsmInstruction *insn)
	Called at the beginning of every instruction.

virtual void	finishInstruction (SgAsmInstruction *insn)
	Called at the end of every instruction.

virtual void	comment (const std::string &)
	Inject a line comment into debugging streams.

virtual SValuePtr	bottom_ (size_t nbits)
	Returns a data-flow bottom value.

virtual SValuePtr	filterCallTarget (const SValuePtr &a)
	Invoked to filter call targets.

virtual SValuePtr	filterReturnTarget (const SValuePtr &a)
	Invoked to filter return targets.

virtual SValuePtr	filterIndirectJumpTarget (const SValuePtr &a)
	Invoked to filter indirect jumps.

virtual void	hlt ()
	Invoked for the x86 HLT instruction.

virtual void	cpuid ()
	Invoked for the x86 CPUID instruction.

virtual SValuePtr	rdtsc ()
	Invoked for the x86 RDTSC instruction.

virtual std::pair< SValuePtr, SValuePtr >	split (const SValuePtr &a, size_t splitPoint)
	Split a value into two narrower values.

virtual SValuePtr	countLeadingZeros (const SValuePtr &a)
	Count leading zero bits.

virtual SValuePtr	countLeadingOnes (const SValuePtr &a)
	Count leading one bits.

virtual SValuePtr	reverseElmts (const SValuePtr &a, size_t elmtNBits)
	Reverse parts of a value.

virtual SValuePtr	ite (const SValuePtr &cond, const SValuePtr &a, const SValuePtr &b) final
	If-then-else.

virtual SValuePtr	addCarry (const SValuePtr &a, const SValuePtr &b, SValuePtr &carryOut, SValuePtr &overflowed)
	Adds two integers of equal size and carry.

virtual SValuePtr	subtract (const SValuePtr &minuend, const SValuePtr &subtrahend)
	Subtract one value from another.

virtual SValuePtr	subtractCarry (const SValuePtr &minuend, const SValuePtr &subtrahend, SValuePtr &carryOut, SValuePtr &overflowed)
	Subtract one value from another and carry.

virtual void	interrupt (const SValuePtr &majr, const SValuePtr &minr, const SValuePtr &raise)
	Invoked for instructions that cause an interrupt.

virtual void	raiseInterrupt (unsigned majorNumber, unsigned minorNumber, const SValuePtr &raise)
	Conditionally raise an interrupt.

virtual SValuePtr	fpFromInteger (const SValuePtr &intValue, SgAsmFloatType *fpType)
	Construct a floating-point value from an integer value.

virtual SValuePtr	fpToInteger (const SValuePtr &fpValue, SgAsmFloatType *fpType, const SValuePtr &dflt)
	Construct an integer value from a floating-point value.

virtual SValuePtr	fpIsNan (const SValuePtr &fpValue, SgAsmFloatType *fpType)
	Whether a floating-point value is a special not-a-number bit pattern.

virtual SValuePtr	fpIsDenormalized (const SValuePtr &fpValue, SgAsmFloatType *fpType)
	Whether a floating-point value is denormalized.

virtual SValuePtr	fpIsZero (const SValuePtr &fpValue, SgAsmFloatType *fpType)
	Whether a floating-point value is equal to zero.

virtual SValuePtr	fpIsInfinity (const SValuePtr &fpValue, SgAsmFloatType *fpType)
	Whether a floating-point value is infinity.

virtual SValuePtr	fpSign (const SValuePtr &fpValue, SgAsmFloatType *fpType)
	Sign of floating-point value.

virtual SValuePtr	fpEffectiveExponent (const SValuePtr &fpValue, SgAsmFloatType *fpType)
	Exponent of floating-point value.

virtual SValuePtr	fpAdd (const SValuePtr &a, const SValuePtr &b, SgAsmFloatType *fpType)
	Add two floating-point values.

virtual SValuePtr	fpSubtract (const SValuePtr &a, const SValuePtr &b, SgAsmFloatType *fpType)
	Subtract one floating-point value from another.

virtual SValuePtr	fpMultiply (const SValuePtr &a, const SValuePtr &b, SgAsmFloatType *fpType)
	Multiply two floating-point values.

virtual SValuePtr	fpDivide (const SValuePtr &a, const SValuePtr &b, SgAsmFloatType *fpType)
	Divide one floating-point value by another.

virtual SValuePtr	fpSquareRoot (const SValuePtr &a, SgAsmFloatType *fpType)
	Square root.

virtual SValuePtr	fpRoundTowardZero (const SValuePtr &a, SgAsmFloatType *fpType)
	Round toward zero.

virtual SValuePtr	convert (const SValuePtr &a, SgAsmType srcType, SgAsmType dstType)
	Convert value from one type to another.

virtual SmtSolverPtr	solver () const
	Property: Satisfiability module theory (SMT) solver.

virtual void	solver (const SmtSolverPtr &s)
	Property: Satisfiability module theory (SMT) solver.

const HotPatch &	hotPatch () const
	Property: Post-instruction hot patches.

HotPatch &	hotPatch ()
	Property: Post-instruction hot patches.

void	hotPatch (const HotPatch &hp)
	Property: Post-instruction hot patches.

virtual StatePtr	currentState () const
	Property: Current semantic state.

virtual void	currentState (const StatePtr &s)
	Property: Current semantic state.

virtual StatePtr	initialState () const
	Property: Optional lazily updated initial state.

virtual void	initialState (const StatePtr &s)
	Property: Optional lazily updated initial state.

virtual const std::string &	name () const
	Property: Name used for debugging.

virtual void	name (const std::string &s)
	Property: Name used for debugging.

void	print (std::ostream &stream, const std::string prefix="") const
	Print multi-line output for this object.

virtual void	print (std::ostream &stream, Formatter &fmt) const
	Print multi-line output for this object.

WithFormatter	with_format (Formatter &fmt)
	Used for printing RISC operators with formatting.

WithFormatter	operator+ (Formatter &fmt)
	Used for printing RISC operators with formatting.

WithFormatter	operator+ (const std::string &linePrefix)
	Used for printing RISC operators with formatting.

virtual size_t	nInsns () const
	Property: Number of instructions processed.

virtual void	nInsns (size_t n)
	Property: Number of instructions processed.

virtual SgAsmInstruction *	currentInstruction () const
	Property: Current instruction.

virtual void	currentInstruction (SgAsmInstruction *insn)
	Property: Current instruction.

virtual bool	isNoopRead () const
	Property: No-op read.

virtual void	isNoopRead (bool b)
	Property: No-op read.

virtual SValuePtr	undefined_ (size_t nbits)
	Returns a new undefined value.

virtual SValuePtr	unspecified_ (size_t nbits)
	Returns a new undefined value.

virtual SValuePtr	concatLoHi (const SValuePtr &lowBits, const SValuePtr &highBits)
	Aliases for concatenation.

virtual SValuePtr	concatHiLo (const SValuePtr &highBits, const SValuePtr &lowBits)
	Aliases for concatenation.

virtual SValuePtr	isEqual (const SValuePtr &a, const SValuePtr &b)
	Equality comparison.

virtual SValuePtr	isNotEqual (const SValuePtr &a, const SValuePtr &b)
	Equality comparison.

virtual SValuePtr	isUnsignedLessThan (const SValuePtr &a, const SValuePtr &b)
	Comparison for unsigned values.

virtual SValuePtr	isUnsignedLessThanOrEqual (const SValuePtr &a, const SValuePtr &b)
	Comparison for unsigned values.

virtual SValuePtr	isUnsignedGreaterThan (const SValuePtr &a, const SValuePtr &b)
	Comparison for unsigned values.

virtual SValuePtr	isUnsignedGreaterThanOrEqual (const SValuePtr &a, const SValuePtr &b)
	Comparison for unsigned values.

virtual SValuePtr	isSignedLessThan (const SValuePtr &a, const SValuePtr &b)
	Comparison for signed values.

virtual SValuePtr	isSignedLessThanOrEqual (const SValuePtr &a, const SValuePtr &b)
	Comparison for signed values.

virtual SValuePtr	isSignedGreaterThan (const SValuePtr &a, const SValuePtr &b)
	Comparison for signed values.

virtual SValuePtr	isSignedGreaterThanOrEqual (const SValuePtr &a, const SValuePtr &b)
	Comparison for signed values.

virtual SValuePtr	readRegister (RegisterDescriptor reg)
	Reads a value from a register.

SValuePtr	peekRegister (RegisterDescriptor reg)
	Obtain a register value without side effects.

Static Public Member Functions
static RiscOperatorsPtr	instanceFromRegisters (const RegisterDictionaryPtr &, const SmtSolverPtr &solver=SmtSolverPtr())
	Instantiates a new RiscOperators object and configures it to use semantic values and states that are defaults for TaintSemantics.

static RiscOperatorsPtr	instanceFromProtoval (const BaseSemantics::SValuePtr &protoval, const SmtSolverPtr &solver=SmtSolverPtr())
	Instantiates a new RiscOperators object with specified prototypical values.

static RiscOperatorsPtr	instanceFromState (const BaseSemantics::StatePtr &, const SmtSolverPtr &solver=SmtSolverPtr())
	Instantiates a new RiscOperators object with specified state.

static RiscOperatorsPtr	promote (const BaseSemantics::RiscOperatorsPtr &)
	Run-time promotion of a base RiscOperators pointer to symbolic operators.

Static Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators
static RiscOperatorsPtr	instanceFromRegisters (const RegisterDictionaryPtr &, const SmtSolverPtr &solver=SmtSolverPtr())
	Instantiates a new RiscOperators object and configures it to use semantic values and states that are defaults for SymbolicSemantics.

static RiscOperatorsPtr	instanceFromProtoval (const BaseSemantics::SValuePtr &protoval, const SmtSolverPtr &solver=SmtSolverPtr())
	Instantiates a new RiscOperators object with specified prototypical values.

static RiscOperatorsPtr	instanceFromState (const BaseSemantics::StatePtr &, const SmtSolverPtr &solver=SmtSolverPtr())
	Instantiates a new RiscOperators object with specified state.

static RiscOperatorsPtr	promote (const BaseSemantics::RiscOperatorsPtr &)
	Run-time promotion of a base RiscOperators pointer to symbolic operators.

static SgAsmFloatType *	sgIsIeee754 (SgAsmType *)
	Tests whether a SgAsmType is an IEEE-754 floating-point type.

Static Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics::BaseSemantics::RiscOperators
static RiscOperatorsPtr	promote (const RiscOperatorsPtr &x)

Protected Member Functions
	RiscOperators (const BaseSemantics::SValuePtr &protoval, const SmtSolverPtr &)

	RiscOperators (const BaseSemantics::StatePtr &, const SmtSolverPtr &)

Protected Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators
	RiscOperators (const BaseSemantics::SValuePtr &protoval, const SmtSolverPtr &solver)

	RiscOperators (const BaseSemantics::StatePtr &state, const SmtSolverPtr &solver)

SValuePtr	svalueUndefined (size_t nbits)

SValuePtr	svalueBottom (size_t nbits)

SValuePtr	svalueUnspecified (size_t nbits)

SValuePtr	svalueNumber (size_t nbits, uint64_t value)

SValuePtr	svalueBoolean (bool b)

Protected Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics::BaseSemantics::RiscOperators
	RiscOperators (const SValuePtr &protoval, const SmtSolverPtr &solver=SmtSolverPtr())

	RiscOperators (const StatePtr &state, const SmtSolverPtr &solver=SmtSolverPtr())

Additional Inherited Members
Protected Attributes inherited from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators
bool	omit_cur_insn

DefinersMode	computingDefiners_

WritersMode	computingMemoryWriters_

WritersMode	computingRegisterWriters_

uint64_t	trimThreshold_

bool	reinterpretMemoryReads_

bool	reinterpretRegisterReads_

size_t	nTrimmed_ = 0

Member Typedef Documentation

◆ Super

using Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::Super = SymbolicSemantics::RiscOperators

Base type.

Definition at line 234 of file TaintSemantics.h.

◆ Ptr

using Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::Ptr = RiscOperatorsPtr

Shared-ownership pointer.

Definition at line 237 of file TaintSemantics.h.

Constructor & Destructor Documentation

◆ ~RiscOperators()

Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::~RiscOperators ( )

virtual

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

Member Function Documentation

◆ instanceFromProtoval()

static RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::instanceFromProtoval	(	const BaseSemantics::SValuePtr &	protoval,
		const SmtSolverPtr &	solver = `SmtSolverPtr()`
	)

static

Instantiates a new RiscOperators object with specified prototypical values.

An SMT solver may be specified as the second argument for convenience. See solver for details.

◆ instanceFromState()

static RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::instanceFromState	(	const BaseSemantics::StatePtr &	,
		const SmtSolverPtr &	solver = `SmtSolverPtr()`
	)

static

Instantiates a new RiscOperators object with specified state.

An SMT solver may be specified as the second argument for convenience. See solver for details.

◆ create() [1/2]

virtual BaseSemantics::RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::create	(	const BaseSemantics::SValuePtr &	protoval,
		const SmtSolverPtr &	solver = `SmtSolverPtr()`
	)		const

overridevirtual

Virtual allocating constructor.

The protoval is a prototypical semantic value that is used as a factory to create additional values as necessary via its virtual constructors. The state upon which the RISC operations operate must be set by modifying the currentState property. An optional SMT solver may be specified (see solver).

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ create() [2/2]

virtual BaseSemantics::RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::create	(	const BaseSemantics::StatePtr &	state,
		const SmtSolverPtr &	solver = `SmtSolverPtr()`
	)		const

overridevirtual

Virtual allocating constructor.

The supplied state is that upon which the RISC operations operate and is also used to define the prototypical semantic value. Other states can be supplied by setting currentState. The prototypical semantic value is used as a factory to create additional values as necessary via its virtual constructors. An optional SMT solver may be specified (see solver).

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ promote()

static RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::promote ( const BaseSemantics::RiscOperatorsPtr & )

static

Run-time promotion of a base RiscOperators pointer to symbolic operators.

This is a checked conversion–it will fail if x does not point to a SymbolicSemantics::RiscOperators object.

◆ and_()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::and_	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

overridevirtual

Computes bit-wise AND of two values.

The operands must both have the same width; the result must be the same width as the operands.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ or_()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::or_	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

overridevirtual

Computes bit-wise OR of two values.

The operands a and b must have the same width; the return value width will be the same as a and b.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ xor_()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::xor_	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

overridevirtual

Computes bit-wise XOR of two values.

The operands a and b must have the same width; the result will be the same width as a and b.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ invert()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::invert ( const BaseSemantics::SValuePtr & a )

overridevirtual

One's complement.

The result will be the same size as the operand.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ extract()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::extract	(	const BaseSemantics::SValuePtr &	a,
		size_t	begin_bit,
		size_t	end_bit
	)

overridevirtual

Extracts bits from a value.

The specified bits from begin_bit (inclusive) through end_bit (exclusive) are copied into the low-order bits of the return value (other bits in the return value are cleared). The least significant bit is number zero. The begin_bit and end_bit values must be valid for the width of a.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ concat()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::concat	(	const BaseSemantics::SValuePtr &	lowBits,
		const BaseSemantics::SValuePtr &	highBits
	)

overridevirtual

Concatenates the bits of two values.

The bits of lowBits and highBits are concatenated so that the result has lowBits in the low-order bits and highBits in the high order bits. The width of the return value is the sum of the widths of lowBits and highBits.

Note that the order of arguments for this method is the reverse of the SymbolicExpression concatenation function.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ leastSignificantSetBit()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::leastSignificantSetBit ( const BaseSemantics::SValuePtr & a )

overridevirtual

Returns position of least significant set bit; zero when no bits are set.

The return value will have the same width as the operand, although this can be safely truncated to the log-base-2 + 1 width.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ mostSignificantSetBit()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::mostSignificantSetBit ( const BaseSemantics::SValuePtr & a )

overridevirtual

Returns position of most significant set bit; zero when no bits are set.

The return value will have the same width as the operand, although this can be safely truncated to the log-base-2 + 1 width.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ rotateLeft()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::rotateLeft	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	nbits
	)

overridevirtual

Rotate bits to the left.

The return value will have the same width as operand a. The nbits is interpreted as unsigned. The behavior is modulo the width of a regardless of whether the implementation makes that a special case or handles it naturally.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ rotateRight()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::rotateRight	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	nbits
	)

overridevirtual

Rotate bits to the right.

The return value will have the same width as operand a. The nbits is interpreted as unsigned. The behavior is modulo the width of a regardless of whether the implementation makes that a special case or handles it naturally.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ shiftLeft()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::shiftLeft	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	nbits
	)

overridevirtual

Returns arg shifted left.

The return value will have the same width as operand a. The nbits is interpreted as unsigned. New bits shifted into the value are zero. If nbits is equal to or larger than the width of a then the result is zero.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ shiftRight()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::shiftRight	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	nbits
	)

overridevirtual

Returns arg shifted right logically (no sign bit).

The return value will have the same width as operand a. The nbits is interpreted as unsigned. New bits shifted into the value are zero. If nbits is equal to or larger than the width of a then the result is zero.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ shiftRightArithmetic()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::shiftRightArithmetic	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	nbits
	)

overridevirtual

Returns arg shifted right arithmetically (with sign bit).

The return value will have the same width as operand a. The nbits is interpreted as unsigned. New bits shifted into the value are the same as the most significant bit (the "sign bit"). If nbits is equal to or larger than the width of a then the result has all bits cleared or all bits set depending on whether the most significant bit was originally clear or set.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ equalToZero()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::equalToZero ( const BaseSemantics::SValuePtr & a )

overridevirtual

Determines whether a value is equal to zero.

Returns true, false, or undefined (in the semantic domain) depending on whether argument is zero.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ iteWithStatus()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::iteWithStatus	(	const BaseSemantics::SValuePtr &	cond,
		const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b,
		IteStatus &	status
	)

overridevirtual

If-then-else with status.

Returns operand a if cond is true, operand b if cond is false, or some other value if the condition is unknown. The condition must be one bit wide; the widths of a and b must be equal; the return value width will be the same as a and b.

The status is an output that indicates how the main return value was determined.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ unsignedExtend()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::unsignedExtend	(	const BaseSemantics::SValuePtr &	a,
		size_t	new_width
	)

overridevirtual

Extend (or shrink) operand a so it is nbits wide by adding or removing high-order bits.

Added bits are always zeros. The result will be the specified new_width.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ signExtend()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::signExtend	(	const BaseSemantics::SValuePtr &	a,
		size_t	new_width
	)

overridevirtual

Sign extends a value.

The result will be the specified new_width, which must be at least as large as the original width.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ add()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::add	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

overridevirtual

Adds two integers of equal size.

The width of a and b must be equal; the return value will have the same width as a and b.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ addWithCarries()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::addWithCarries	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b,
		const BaseSemantics::SValuePtr &	c,
		BaseSemantics::SValuePtr &	carry_out
	)

overridevirtual

Add two values of equal size and a carry bit.

Carry information is returned via carry_out argument. The carry_out value is the tick marks that are written above the first addend when doing long arithmetic like a 2nd grader would do (of course, they'd probably be adding two base-10 numbers). For instance, when adding 00110110 and 11100100:

 '''..'..         <-- carry tick marks: '=carry .=no carry
  00110110
+ 11100100
----------
 100011010

The carry_out value is 11100100.

The width of a and b must be equal; c must have a width of one bit; the return value and carry_out will be the same width as a and b. The carry_out value is allocated herein.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ negate()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::negate ( const BaseSemantics::SValuePtr & a )

overridevirtual

Two's complement.

The return value will have the same width as the operand.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ signedDivide()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::signedDivide	(	const BaseSemantics::SValuePtr &	dividend,
		const BaseSemantics::SValuePtr &	divisor
	)

overridevirtual

Divides two signed values.

The width of the result will be the same as the width of the dividend.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ signedModulo()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::signedModulo	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

overridevirtual

Calculates modulo with signed values.

The width of the result will be the same as the width of operand b.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ signedMultiply()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::signedMultiply	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

overridevirtual

Multiplies two signed values.

The width of the result will be the sum of the widths of a and b.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ unsignedDivide()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::unsignedDivide	(	const BaseSemantics::SValuePtr &	dividend,
		const BaseSemantics::SValuePtr &	divisor
	)

overridevirtual

Divides two unsigned values.

The width of the result is the same as the width of the dividend.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ unsignedModulo()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::unsignedModulo	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

overridevirtual

Calculates modulo with unsigned values.

The width of the result is the same as the width of operand b.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ unsignedMultiply()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::unsignedMultiply	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

overridevirtual

Multiply two unsigned values.

The width of the result is the sum of the widths of a and b.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ fpConvert()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::fpConvert	(	const BaseSemantics::SValuePtr &	a,
		SgAsmFloatType *	aType,
		SgAsmFloatType *	retType
	)

overridevirtual

Convert from one floating-point type to another.

Converts the floating-point value a having type aType to the return value having retType.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

◆ reinterpret()

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics::TaintSemantics::RiscOperators::reinterpret	(	const BaseSemantics::SValuePtr &	a,
		SgAsmType *	retType
	)

overridevirtual

Reinterpret an expression as a different type.

For semantic domains whose values don't carry type information this is a no-op. For other domains, this creates a new value having the same bits as the original value but a new type. The old and new types must be the same size. This is similar to a C++ reinterpret_cast.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics::SymbolicSemantics::RiscOperators.

The documentation for this class was generated from the following file:

TaintSemantics.h

Description

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Member Typedef Documentation

◆ Super

◆ Ptr

Constructor & Destructor Documentation

◆ ~RiscOperators()

Member Function Documentation

◆ instanceFromProtoval()

◆ instanceFromState()

◆ create() [1/2]

◆ create() [2/2]

◆ promote()

◆ and_()

◆ or_()

◆ xor_()

◆ invert()

◆ extract()

◆ concat()

◆ leastSignificantSetBit()

◆ mostSignificantSetBit()

◆ rotateLeft()

◆ rotateRight()

◆ shiftLeft()

◆ shiftRight()

◆ shiftRightArithmetic()

◆ equalToZero()

◆ iteWithStatus()

◆ unsignedExtend()

◆ signExtend()

◆ add()

◆ addWithCarries()

◆ negate()

◆ signedDivide()

◆ signedModulo()

◆ signedMultiply()

◆ unsignedDivide()

◆ unsignedModulo()

◆ unsignedMultiply()

◆ fpConvert()

◆ reinterpret()