ROSE  0.10.0.0
Public Member Functions | Static Public Member Functions | Protected Member Functions | List of all members
Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::RiscOperators Class Reference

Description

NullSemantics operators always return a new undefined value.

They do, however, check certain preconditions.

Definition at line 274 of file NullSemantics2.h.

#include <NullSemantics2.h>

Inheritance diagram for Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::RiscOperators:
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Collaboration diagram for Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::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 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 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 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 void interrupt (int, int)
 Invoked for instructions that cause an interrupt. More...
 
virtual SValuePtr fpFromInteger (const SValuePtr &intValue, SgAsmFloatType *fpType)
 Construct a floating-point value from an integer value. More...
 
virtual SValuePtr fpToInteger (const SValuePtr &fpValue, SgAsmFloatType *fpType, const SValuePtr &dflt)
 Construct an integer value from a floating-point 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 fpAdd (const SValuePtr &a, const SValuePtr &b, SgAsmFloatType *fpType)
 Add two floating-point values. More...
 
virtual SValuePtr fpSubtract (const SValuePtr &a, const SValuePtr &b, SgAsmFloatType *fpType)
 Subtract one floating-point value from another. More...
 
virtual SValuePtr fpMultiply (const SValuePtr &a, const SValuePtr &b, SgAsmFloatType *fpType)
 Multiply two floating-point values. 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 fpRoundTowardZero (const SValuePtr &a, SgAsmFloatType *fpType)
 Round toward zero. 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 HotPatchhotPatch () const
 Property: Post-instruction hot patches. More...
 
HotPatchhotPatch ()
 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)
 Instantiate a new RiscOperators object and configures it to use semantic values and states that are defaults for NullSemantics. More...
 
static RiscOperatorsPtr instance (const BaseSemantics::SValuePtr &protoval, const SmtSolverPtr &solver=SmtSolverPtr())
 Static allocating constructor. More...
 
static RiscOperatorsPtr instance (const BaseSemantics::StatePtr &state, const SmtSolverPtr &solver=SmtSolverPtr())
 Constructor. 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=SmtSolverPtr())
 
 RiscOperators (const BaseSemantics::StatePtr &state, const SmtSolverPtr &solver=SmtSolverPtr())
 
- 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::NullSemantics::RiscOperators::instance ( const RegisterDictionary regdict)
static

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

Referenced by create().

static RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::RiscOperators::instance ( const BaseSemantics::SValuePtr protoval,
const SmtSolverPtr solver = SmtSolverPtr() 
)
inlinestatic

Static allocating constructor.

See the virtual constructor, create(), for details.

Definition at line 296 of file NullSemantics2.h.

References Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators::solver().

static RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::RiscOperators::instance ( const BaseSemantics::StatePtr state,
const SmtSolverPtr solver = SmtSolverPtr() 
)
inlinestatic

Constructor.

See the virtual constructor, create(), for details.

Definition at line 301 of file NullSemantics2.h.

References Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators::solver().

virtual BaseSemantics::RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::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.

Definition at line 308 of file NullSemantics2.h.

References instance(), and Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators::solver().

virtual BaseSemantics::RiscOperatorsPtr Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::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 313 of file NullSemantics2.h.

References instance(), and Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators::solver().

virtual BaseSemantics::SValuePtr Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::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::NullSemantics::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::NullSemantics::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::NullSemantics::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::NullSemantics::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::NullSemantics::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::NullSemantics::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::NullSemantics::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::NullSemantics::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::NullSemantics::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::NullSemantics::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: