Description

Defines RISC operators for the ConcreteSemantics domain.

These RISC operators depend on functionality introduced into the SValue class hierarchy at the ConcreteSemantics::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 ConcreteSemantics::SValue (or subclass).

Each RISC operator should return a newly allocated semantic value rather than trying to re-use an existing one. This will allow the caller to change the value stored there without affecting any of the input arguments. 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 334 of file ConcreteSemantics2.h.

#include <ConcreteSemantics2.h>

Inheritance diagram for Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators:

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Collaboration diagram for Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators:

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

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

virtual void	interrupt (int majr, int minr) ROSE_OVERRIDE
	Invoked for instructions that cause an interrupt. More...

virtual BaseSemantics::SValuePtr	and_ (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	or_ (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	xor_ (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	invert (const BaseSemantics::SValuePtr &a_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	extract (const BaseSemantics::SValuePtr &a_, size_t begin_bit, size_t end_bit) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	concat (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	leastSignificantSetBit (const BaseSemantics::SValuePtr &a_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	mostSignificantSetBit (const BaseSemantics::SValuePtr &a_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	rotateLeft (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	rotateRight (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	shiftLeft (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	shiftRight (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	shiftRightArithmetic (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &sa_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	equalToZero (const BaseSemantics::SValuePtr &a_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	ite (const BaseSemantics::SValuePtr &sel_, const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	unsignedExtend (const BaseSemantics::SValuePtr &a_, size_t new_width) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	signExtend (const BaseSemantics::SValuePtr &a_, size_t new_width) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	add (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_) ROSE_OVERRIDE

virtual BaseSemantics::SValuePtr	addWithCarries (const BaseSemantics::SValuePtr &a_, const BaseSemantics::SValuePtr &b_, const BaseSemantics::SValuePtr &c_, BaseSemantics::SValuePtr &carry_out) ROSE_OVERRIDE
	Used for printing RISC operators with formatting. More...

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

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

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

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

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

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

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

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

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

virtual BaseSemantics::SValuePtr	fpAdd (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &b, SgAsmFloatType *) ROSE_OVERRIDE
	Add two floating-point values. More...

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

virtual BaseSemantics::SValuePtr	fpMultiply (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &b, SgAsmFloatType *) ROSE_OVERRIDE
	Multiply two floating-point values. More...

virtual BaseSemantics::SValuePtr	fpRoundTowardZero (const BaseSemantics::SValuePtr &a, SgAsmFloatType *) ROSE_OVERRIDE
	Round toward zero. More...

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

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

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

Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators
virtual SValuePtr	protoval () const
	Property: Prototypical semantic value. More...

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

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

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

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

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

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

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

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

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

virtual SValuePtr	reinterpret (const SValuePtr &a, SgAsmType *retType)
	Reinterpret an expression as a different type. More...

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

virtual void	writeRegister (RegisterDescriptor reg, const SValuePtr &a)
	Writes a value to a register. More...

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

virtual SValuePtr	peekRegister (RegisterDescriptor, const SValuePtr &dflt)
	Obtain a register value without side effects. More...

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

Static Public Member Functions
static RiscOperatorsPtr	instance (const RegisterDictionary *regdict, const SmtSolverPtr &solver=SmtSolverPtr())
	Instantiates a new RiscOperators object and configures it to use semantic values and states that are defaults for ConcreteSemantics. More...

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

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

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

Static Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators
static RiscOperatorsPtr	promote (const RiscOperatorsPtr &x)

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

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

SValuePtr	svalue_number (size_t nbits, uint64_t value)

SValuePtr	svalue_number (const Sawyer::Container::BitVector &)

SValuePtr	svalue_boolean (bool b)

SValuePtr	svalue_zero (size_t nbits)

BaseSemantics::SValuePtr	readOrPeekMemory (RegisterDescriptor segreg, const BaseSemantics::SValuePtr &address, const BaseSemantics::SValuePtr &dflt, bool allowSideEffects)

double	exprToDouble (const BaseSemantics::SValuePtr &expr, SgAsmFloatType *)

BaseSemantics::SValuePtr	doubleToExpr (double d, SgAsmFloatType *)

Protected Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators
	RiscOperators (const SValuePtr &protoval, const SmtSolverPtr &solver=SmtSolverPtr())

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

Additional Inherited Members
Public Types inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators
typedef RiscOperatorsPtr	Ptr
	Shared-ownership pointer for a RiscOperators object. More...

Member Function Documentation

static RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::instance	(	const RegisterDictionary *	regdict,
		const SmtSolverPtr &	solver = `SmtSolverPtr()`
	)

inlinestatic

Instantiates a new RiscOperators object and configures it to use semantic values and states that are defaults for ConcreteSemantics.

Definition at line 355 of file ConcreteSemantics2.h.

References Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::SValue::instance(), Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::MemoryState::instance(), and Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterStateGeneric::instance().

Referenced by create().

static RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::instance	(	const BaseSemantics::SValuePtr &	protoval,
		const SmtSolverPtr &	solver = `SmtSolverPtr()`
	)

inlinestatic

Instantiates a new RiscOperators object with specified prototypical values.

An SMT solver may be specified as the second argument because the base class expects one, but it is not used for ConcreteSemantics. See SmtSolver for details.

Definition at line 366 of file ConcreteSemantics2.h.

static RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::instance	(	const BaseSemantics::StatePtr &	state,
		const SmtSolverPtr &	solver = `SmtSolverPtr()`
	)

inlinestatic

Instantiates a new RiscOperators object with specified state.

An SMT solver may be specified as the second argument because the base class expects one, but it is not used for concrete semantics. See solver for details.

Definition at line 372 of file ConcreteSemantics2.h.

virtual BaseSemantics::RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::create	(	const BaseSemantics::SValuePtr &	protoval,
		const SmtSolverPtr &	solver = `SmtSolverPtr()`
	)		const

inlinevirtual

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).

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

Reimplemented in Rose::BinaryAnalysis::InstructionSemantics2::NativeSemantics::RiscOperators.

Definition at line 379 of file ConcreteSemantics2.h.

References instance().

virtual BaseSemantics::RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::create	(	const BaseSemantics::StatePtr &	state,
		const SmtSolverPtr &	solver = `SmtSolverPtr()`
	)		const

inlinevirtual

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).

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

Definition at line 384 of file ConcreteSemantics2.h.

References instance().

static RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::promote ( const BaseSemantics::RiscOperatorsPtr & x )

inlinestatic

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

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

Definition at line 394 of file ConcreteSemantics2.h.

virtual void Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::interrupt	(	int	,
		int
	)

virtual

Invoked for instructions that cause an interrupt.

The major and minor numbers are architecture specific. For instance, an x86 INT instruction uses major number zero and the minor number is the interrupt number (e.g., 0x80 for Linux system calls), while an x86 SYSENTER instruction uses major number one. The minr operand for INT3 is -3 to distinguish it from the one-argument "INT 3" instruction which has slightly different semantics.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::addWithCarries	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b,
		const BaseSemantics::SValuePtr &	c,
		BaseSemantics::SValuePtr &	carry_out
	)

virtual

Used for printing RISC operators with formatting.

The usual way to use this is:

RiscOperatorsPtr obj = ...;
Formatter fmt = ...;
std::cout <<"The value is: " <<(*obj+fmt) <<"\n";

Since specifying a line prefix string for indentation purposes is such a common use case, the indentation can be given instead of a format, as in the following code that indents the prefixes each line of the expression with four spaces.

    std::cout <<"Machine state:\n" <<*(obj + "    ");
   @code
   @{ */
WithFormatter with_format(Formatter &fmt) { return WithFormatter(shared_from_this(), fmt); }
WithFormatter operator+(Formatter &fmt) { return with_format(fmt); }
WithFormatter operator+(const std::string &linePrefix);
virtual size_t nInsns() const { return nInsns_; }
virtual void nInsns(size_t n) { nInsns_ = n; }
virtual SgAsmInstruction* currentInstruction() const {
    return currentInsn_;
}
virtual void startInstruction(SgAsmInstruction *insn);
virtual void finishInstruction(SgAsmInstruction *insn);
//                                  Value Construction Operations
// The trailing underscores are necessary for for undefined_() on some machines, so we just add one to the end of all the
// virtual constructors for consistency.
virtual SValuePtr undefined_(size_t nbits);
virtual SValuePtr unspecified_(size_t nbits);
virtual SValuePtr number_(size_t nbits, uint64_t value);
virtual SValuePtr boolean_(bool value);
virtual SValuePtr bottom_(size_t nbits);
//                                  x86-specific Operations (FIXME)
virtual SValuePtr filterCallTarget(const SValuePtr &a);
virtual SValuePtr filterReturnTarget(const SValuePtr &a);
virtual SValuePtr filterIndirectJumpTarget(const SValuePtr &a);
virtual void hlt() {}
virtual void cpuid() {}
virtual SValuePtr rdtsc() { return unspecified_(64); }
//                                  Boolean Operations
virtual SValuePtr and_(const SValuePtr &a, const SValuePtr &b) = 0;
virtual SValuePtr or_(const SValuePtr &a, const SValuePtr &b) = 0;
virtual SValuePtr xor_(const SValuePtr &a, const SValuePtr &b) = 0;
virtual SValuePtr invert(const SValuePtr &a) = 0;
virtual SValuePtr extract(const SValuePtr &a, size_t begin_bit, size_t end_bit) = 0;
virtual SValuePtr concat(const SValuePtr &lowBits, const SValuePtr &highBits) = 0;
virtual std::pair<SValuePtr /*low*/, SValuePtr /*high*/> split(const SValuePtr &a, size_t splitPoint);
virtual SValuePtr leastSignificantSetBit(const SValuePtr &a) = 0;
virtual SValuePtr mostSignificantSetBit(const SValuePtr &a) = 0;
virtual SValuePtr rotateLeft(const SValuePtr &a, const SValuePtr &nbits) = 0;
virtual SValuePtr rotateRight(const SValuePtr &a, const SValuePtr &nbits) = 0;
virtual SValuePtr shiftLeft(const SValuePtr &a, const SValuePtr &nbits) = 0;
virtual SValuePtr shiftRight(const SValuePtr &a, const SValuePtr &nbits) = 0;
virtual SValuePtr shiftRightArithmetic(const SValuePtr &a, const SValuePtr &nbits) = 0;
//                                  Comparison Operations
virtual SValuePtr equalToZero(const SValuePtr &a) = 0;
virtual SValuePtr ite(const SValuePtr &cond, const SValuePtr &a, const SValuePtr &b) = 0;
virtual SValuePtr isEqual(const SValuePtr &a, const SValuePtr &b);
virtual SValuePtr isNotEqual(const SValuePtr &a, const SValuePtr &b);
virtual SValuePtr isUnsignedLessThan(const SValuePtr &a, const SValuePtr &b);
virtual SValuePtr isUnsignedLessThanOrEqual(const SValuePtr &a, const SValuePtr &b);
virtual SValuePtr isUnsignedGreaterThan(const SValuePtr &a, const SValuePtr &b);
virtual SValuePtr isUnsignedGreaterThanOrEqual(const SValuePtr &a, const SValuePtr &b);
virtual SValuePtr isSignedLessThan(const SValuePtr &a, const SValuePtr &b);
virtual SValuePtr isSignedLessThanOrEqual(const SValuePtr &a, const SValuePtr &b);
virtual SValuePtr isSignedGreaterThan(const SValuePtr &a, const SValuePtr &b);
virtual SValuePtr isSignedGreaterThanOrEqual(const SValuePtr &a, const SValuePtr &b);
//                                  Integer Arithmetic Operations
virtual SValuePtr unsignedExtend(const SValuePtr &a, size_t new_width);
virtual SValuePtr signExtend(const SValuePtr &a, size_t new_width) = 0;
virtual SValuePtr add(const SValuePtr &a, const SValuePtr &b) = 0;
virtual SValuePtr addCarry(const SValuePtr &a, const SValuePtr &b,
                           SValuePtr &carryOut /*out*/, SValuePtr &overflowed /*out*/);
virtual SValuePtr subtract(const SValuePtr &minuend, const SValuePtr &subtrahend);
virtual SValuePtr subtractCarry(const SValuePtr &minuend, const SValuePtr &subtrahend,
                                SValuePtr &carryOut /*out*/, SValuePtr &overflowed /*out*/);

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.

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::negate ( const BaseSemantics::SValuePtr & a )

virtual

Two's complement.

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

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::signedDivide	(	const BaseSemantics::SValuePtr &	dividend,
		const BaseSemantics::SValuePtr &	divisor
	)

virtual

Divides two signed values.

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

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::signedModulo	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

virtual

Calculates modulo with signed values.

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

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::signedMultiply	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

virtual

Multiplies two signed values.

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

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::unsignedDivide	(	const BaseSemantics::SValuePtr &	dividend,
		const BaseSemantics::SValuePtr &	divisor
	)

virtual

Divides two unsigned values.

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

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::unsignedModulo	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

virtual

Calculates modulo with unsigned values.

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

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::unsignedMultiply	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b
	)

virtual

Multiply two unsigned values.

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

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::fpFromInteger	(	const BaseSemantics::SValuePtr &	intValue,
		SgAsmFloatType *	fpType
	)

virtual

Construct a floating-point value from an integer value.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::fpToInteger	(	const BaseSemantics::SValuePtr &	fpValue,
		SgAsmFloatType *	fpType,
		const BaseSemantics::SValuePtr &	dflt
	)

virtual

Construct an integer value from a floating-point value.

The bits of fpValue are interpreted according to the fpType and converted to a signed integer value that fits in integerWidth bits. This is done by truncating the fractional part of the floating point number, thus rounding toward zero. If fpValue is not a number then dflt is returned.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::fpAdd	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b,
		SgAsmFloatType *	fpType
	)

virtual

Add two floating-point values.

Adds two floating-point values that have the same type and returns the sum in the same type.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::fpSubtract	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b,
		SgAsmFloatType *	fpType
	)

virtual

Subtract one floating-point value from another.

Subtracts b from a and returns the difference. All three floating-point values have the same type. The default implementation is in terms of negate and add.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::fpMultiply	(	const BaseSemantics::SValuePtr &	a,
		const BaseSemantics::SValuePtr &	b,
		SgAsmFloatType *	fpType
	)

virtual

Multiply two floating-point values.

Multiplies two floating-point values and returns the product. All three values have the same type.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::fpRoundTowardZero	(	const BaseSemantics::SValuePtr &	a,
		SgAsmFloatType *	fpType
	)

virtual

Round toward zero.

Truncate the fractional part of the floating point number.

Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::readMemory	(	RegisterDescriptor	segreg,
		const BaseSemantics::SValuePtr &	addr,
		const BaseSemantics::SValuePtr &	dflt,
		const BaseSemantics::SValuePtr &	cond
	)

virtual

Reads a value from memory.

The implementation (in subclasses) will typically delegate much of the work to the current state's readMemory method.

A MemoryState will implement storage for memory locations and might impose certain restrictions, such as "all memory values must be eight bits". However, the readMemory should not have these constraints so that it can be called from a variety of Dispatcher subclass (e.g., the DispatcherX86 class assumes that readMemory is capable of reading 32-bit values from little-endian memory). The designers of the MemoryState, State, and RiscOperators should collaborate to decide which layer (RiscOperators, State, or MemoryState) is reponsible for combining individual memory locations into larger values. A RiscOperators object is passed along the chain of delegations for this purpose. The RiscOperators might also contain other data that's important during the process, such as an SMT solver.

The segreg argument is an optional segment register. Most architectures have a flat virtual address space and will pass a default-constructed register descriptor whose is_valid() method returns false.

The cond argument is a Boolean value that indicates whether this is a true read operation. If cond can be proven to be false then the read is a no-op and returns an arbitrary value.

The dflt argument determines the size of the value to be read. This argument is also passed along to the lower layers so that they can, if they desire, use it to initialize memory that has never been read or written before.

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::peekMemory	(	RegisterDescriptor	segreg,
		const BaseSemantics::SValuePtr &	addr,
		const BaseSemantics::SValuePtr &	dflt
	)

virtual

Read memory without side effects.

This is a lower-level operation than readMemory in that it doesn't cause any side effects in the memory state. In all other respects, it's similar to readMemory.

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

virtual void Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::writeMemory	(	RegisterDescriptor	segreg,
		const BaseSemantics::SValuePtr &	addr,
		const BaseSemantics::SValuePtr &	data,
		const BaseSemantics::SValuePtr &	cond
	)

virtual

Writes a value to memory.

The implementation (in subclasses) will typically delegate much of the work to the current state's writeMemory method.

The segreg argument is an optional segment register. Most architectures have a flat virtual address space and will pass a default-constructed register descriptor whose is_valid() method returns false.

The cond argument is a Boolean value that indicates whether this is a true write operation. If cond can be proved to be false then writeMemory is a no-op.

Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.

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

ConcreteSemantics2.h

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