Description
Defines RISC operators for the MultiSemantics domain.
Invoking a RISC operation in the MultiSemantics domain causes the same operation to be invoked for each of its subdomains provided all arguments are valid in those subdomains (i.e., SValue::is_valid() returns true).
Definition at line 243 of file MultiSemantics2.h.
#include <MultiSemantics2.h>
Classes | |
| class | Cursor |
| Iterates over valid subdomains whose inputs are valid. More... | |
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 size_t | add_subdomain (const BaseSemantics::RiscOperatorsPtr &subdomain, const std::string &name, bool activate=true) |
| Add a subdomain to this MultiSemantics domain. More... | |
| virtual Formatter & | get_formatter () |
| Returns a formatter containing the names of the subdomains. More... | |
| virtual size_t | nsubdomains () const |
| Returns the number of subdomains added to this MultiDomain. More... | |
| virtual BaseSemantics::RiscOperatorsPtr | get_subdomain (size_t idx) const |
| Returns the RiscOperators for a subdomain. More... | |
| virtual bool | is_active (size_t idx) const |
| Returns true if a subdomain is active. More... | |
| virtual void | clear_active (size_t idx) |
| Makes a subdomain inactive. More... | |
| virtual void | set_active (size_t idx, bool status) |
| Makes a subdomain active or inactive. More... | |
| virtual void | before (size_t idx) |
| Called before each subdomain RISC operation. More... | |
| virtual void | after (size_t idx) |
| Called after each subdomain RISC operation. More... | |
| virtual SValuePtr | svalue_empty (size_t nbits) |
| Convenience function for SValue::create_empty(). More... | |
| virtual void | print (std::ostream &o, BaseSemantics::Formatter &) const ROSE_OVERRIDE |
| Print multi-line output for this object. | |
| virtual void | startInstruction (SgAsmInstruction *insn) ROSE_OVERRIDE |
| Called at the beginning of every instruction. More... | |
| virtual void | finishInstruction (SgAsmInstruction *insn) ROSE_OVERRIDE |
| Called at the end of every instruction. More... | |
| virtual BaseSemantics::SValuePtr | undefined_ (size_t nbits) ROSE_OVERRIDE |
| Returns a new undefined value. More... | |
| virtual BaseSemantics::SValuePtr | unspecified_ (size_t nbits) ROSE_OVERRIDE |
| virtual BaseSemantics::SValuePtr | number_ (size_t nbits, uint64_t value) ROSE_OVERRIDE |
| Returns a number of the specified bit width. More... | |
| virtual BaseSemantics::SValuePtr | boolean_ (bool) ROSE_OVERRIDE |
| Returns a Boolean value. More... | |
| virtual BaseSemantics::SValuePtr | bottom_ (size_t nbits) ROSE_OVERRIDE |
| Returns a data-flow bottom value. More... | |
| virtual BaseSemantics::SValuePtr | filterCallTarget (const BaseSemantics::SValuePtr &) ROSE_OVERRIDE |
| Invoked to filter call targets. More... | |
| virtual BaseSemantics::SValuePtr | filterReturnTarget (const BaseSemantics::SValuePtr &) ROSE_OVERRIDE |
| Invoked to filter return targets. More... | |
| virtual BaseSemantics::SValuePtr | filterIndirectJumpTarget (const BaseSemantics::SValuePtr &) ROSE_OVERRIDE |
| Invoked to filter indirect jumps. More... | |
| virtual BaseSemantics::SValuePtr | and_ (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &b) ROSE_OVERRIDE |
| Computes bit-wise AND of two values. More... | |
| virtual BaseSemantics::SValuePtr | or_ (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &b) ROSE_OVERRIDE |
| Computes bit-wise OR of two values. More... | |
| virtual BaseSemantics::SValuePtr | xor_ (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &b) ROSE_OVERRIDE |
| Computes bit-wise XOR of two values. More... | |
| virtual BaseSemantics::SValuePtr | invert (const BaseSemantics::SValuePtr &a) ROSE_OVERRIDE |
| One's complement. More... | |
| virtual BaseSemantics::SValuePtr | extract (const BaseSemantics::SValuePtr &a, size_t begin_bit, size_t end_bit) ROSE_OVERRIDE |
| Extracts bits from a value. More... | |
| virtual BaseSemantics::SValuePtr | concat (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &b) ROSE_OVERRIDE |
| Concatenates the bits of two values. More... | |
| virtual BaseSemantics::SValuePtr | leastSignificantSetBit (const BaseSemantics::SValuePtr &a) ROSE_OVERRIDE |
| Returns position of least significant set bit; zero when no bits are set. More... | |
| virtual BaseSemantics::SValuePtr | mostSignificantSetBit (const BaseSemantics::SValuePtr &a) ROSE_OVERRIDE |
| Returns position of most significant set bit; zero when no bits are set. More... | |
| virtual BaseSemantics::SValuePtr | rotateLeft (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &nbits) ROSE_OVERRIDE |
| Rotate bits to the left. More... | |
| virtual BaseSemantics::SValuePtr | rotateRight (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &nbits) ROSE_OVERRIDE |
| Rotate bits to the right. More... | |
| virtual BaseSemantics::SValuePtr | shiftLeft (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &nbits) ROSE_OVERRIDE |
| Returns arg shifted left. More... | |
| virtual BaseSemantics::SValuePtr | shiftRight (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &nbits) ROSE_OVERRIDE |
| Returns arg shifted right logically (no sign bit). More... | |
| virtual BaseSemantics::SValuePtr | shiftRightArithmetic (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &nbits) ROSE_OVERRIDE |
| Returns arg shifted right arithmetically (with sign bit). More... | |
| virtual BaseSemantics::SValuePtr | equalToZero (const BaseSemantics::SValuePtr &a) ROSE_OVERRIDE |
| Determines whether a value is equal to zero. More... | |
| virtual BaseSemantics::SValuePtr | ite (const BaseSemantics::SValuePtr &cond, const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &b) ROSE_OVERRIDE |
| If-then-else. More... | |
| virtual BaseSemantics::SValuePtr | unsignedExtend (const BaseSemantics::SValuePtr &a, size_t new_width) ROSE_OVERRIDE |
Extend (or shrink) operand a so it is nbits wide by adding or removing high-order bits. More... | |
| virtual BaseSemantics::SValuePtr | signExtend (const BaseSemantics::SValuePtr &a, size_t new_width) ROSE_OVERRIDE |
| Sign extends a value. More... | |
| virtual BaseSemantics::SValuePtr | add (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &b) ROSE_OVERRIDE |
| Adds two integers of equal size. More... | |
| virtual BaseSemantics::SValuePtr | addWithCarries (const BaseSemantics::SValuePtr &a, const BaseSemantics::SValuePtr &b, const BaseSemantics::SValuePtr &c, BaseSemantics::SValuePtr &carry_out) ROSE_OVERRIDE |
| Add two values of equal size and a carry bit. 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 &, SgAsmFloatType *) ROSE_OVERRIDE |
| Construct a floating-point value from an integer value. More... | |
| virtual BaseSemantics::SValuePtr | fpToInteger (const BaseSemantics::SValuePtr &, SgAsmFloatType *, const BaseSemantics::SValuePtr &) ROSE_OVERRIDE |
| Construct an integer value from a floating-point value. More... | |
| virtual BaseSemantics::SValuePtr | fpConvert (const BaseSemantics::SValuePtr &, SgAsmFloatType *, SgAsmFloatType *) ROSE_OVERRIDE |
| Convert from one floating-point type to another. More... | |
| virtual BaseSemantics::SValuePtr | fpIsNan (const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Whether a floating-point value is a special not-a-number bit pattern. More... | |
| virtual BaseSemantics::SValuePtr | fpIsDenormalized (const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Whether a floating-point value is denormalized. More... | |
| virtual BaseSemantics::SValuePtr | fpIsZero (const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Whether a floating-point value is equal to zero. More... | |
| virtual BaseSemantics::SValuePtr | fpIsInfinity (const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Whether a floating-point value is infinity. More... | |
| virtual BaseSemantics::SValuePtr | fpSign (const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Sign of floating-point value. More... | |
| virtual BaseSemantics::SValuePtr | fpEffectiveExponent (const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Exponent of floating-point value. More... | |
| virtual BaseSemantics::SValuePtr | fpAdd (const BaseSemantics::SValuePtr &, const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Add two floating-point values. More... | |
| virtual BaseSemantics::SValuePtr | fpSubtract (const BaseSemantics::SValuePtr &, const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Subtract one floating-point value from another. More... | |
| virtual BaseSemantics::SValuePtr | fpMultiply (const BaseSemantics::SValuePtr &, const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Multiply two floating-point values. More... | |
| virtual BaseSemantics::SValuePtr | fpDivide (const BaseSemantics::SValuePtr &, const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Divide one floating-point value by another. More... | |
| virtual BaseSemantics::SValuePtr | fpSquareRoot (const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Square root. More... | |
| virtual BaseSemantics::SValuePtr | fpRoundTowardZero (const BaseSemantics::SValuePtr &, SgAsmFloatType *) ROSE_OVERRIDE |
| Round toward zero. More... | |
| virtual BaseSemantics::SValuePtr | readRegister (RegisterDescriptor reg, const BaseSemantics::SValuePtr &dflt) ROSE_OVERRIDE |
| Reads a value from a register. More... | |
| virtual BaseSemantics::SValuePtr | peekRegister (RegisterDescriptor reg, const BaseSemantics::SValuePtr &dflt) ROSE_OVERRIDE |
| Obtain a register value without side effects. More... | |
| virtual void | writeRegister (RegisterDescriptor reg, const BaseSemantics::SValuePtr &a) ROSE_OVERRIDE |
| Writes a value to a register. 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 SgAsmInstruction * | currentInstruction () const |
| Returns current instruction. More... | |
| virtual void | hlt () |
| Invoked for the x86 HLT instruction. More... | |
| virtual void | cpuid () |
| Invoked for the x86 CPUID instruction. More... | |
| virtual SValuePtr | rdtsc () |
| Invoked for the x86 RDTSC instruction. More... | |
| virtual SValuePtr | subtract (const SValuePtr &minuend, const SValuePtr &subtrahend) |
| Subtract one value from another. More... | |
| virtual void | interrupt (int, int) |
| Invoked for instructions that cause an interrupt. 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... | |
| 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. | |
| WithFormatter | with_format (Formatter &fmt) |
| Used for printing RISC operators with formatting. More... | |
| WithFormatter | operator+ (Formatter &fmt) |
| Used for printing RISC operators with formatting. More... | |
| virtual size_t | nInsns () const |
| Property: Number of instructions processed. More... | |
| virtual void | nInsns (size_t n) |
| Property: Number of instructions processed. More... | |
| virtual SValuePtr | isEqual (const SValuePtr &a, const SValuePtr &b) |
| Equality comparison. More... | |
| virtual SValuePtr | isNotEqual (const SValuePtr &a, const SValuePtr &b) |
| Equality comparison. More... | |
| virtual SValuePtr | isUnsignedLessThan (const SValuePtr &a, const SValuePtr &b) |
| Comparison for unsigned values. More... | |
| virtual SValuePtr | isUnsignedLessThanOrEqual (const SValuePtr &a, const SValuePtr &b) |
| Comparison for unsigned values. More... | |
| virtual SValuePtr | isUnsignedGreaterThan (const SValuePtr &a, const SValuePtr &b) |
| Comparison for unsigned values. More... | |
| virtual SValuePtr | isUnsignedGreaterThanOrEqual (const SValuePtr &a, const SValuePtr &b) |
| Comparison for unsigned values. More... | |
| virtual SValuePtr | isSignedLessThan (const SValuePtr &a, const SValuePtr &b) |
| Comparison for signed values. More... | |
| virtual SValuePtr | isSignedLessThanOrEqual (const SValuePtr &a, const SValuePtr &b) |
| Comparison for signed values. More... | |
| virtual SValuePtr | isSignedGreaterThan (const SValuePtr &a, const SValuePtr &b) |
| Comparison for signed values. More... | |
| virtual SValuePtr | isSignedGreaterThanOrEqual (const SValuePtr &a, const SValuePtr &b) |
| Comparison for signed values. More... | |
| virtual SValuePtr | readRegister (RegisterDescriptor reg) |
| Reads a value from a register. More... | |
| SValuePtr | peekRegister (RegisterDescriptor reg) |
| Obtain a register value without side effects. More... | |
Static Public Member Functions | |
| static RiscOperatorsPtr | instance (const RegisterDictionary *regdict) |
| Static allocating constructor. More... | |
| static RiscOperatorsPtr | instance (const BaseSemantics::SValuePtr &protoval, const SmtSolverPtr &solver=SmtSolverPtr()) |
| static RiscOperatorsPtr | instance (const BaseSemantics::StatePtr &state, const SmtSolverPtr &solver=SmtSolverPtr()) |
| static RiscOperatorsPtr | promote (const BaseSemantics::RiscOperatorsPtr &ops) |
| Static Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators | |
| static RiscOperatorsPtr | promote (const RiscOperatorsPtr &x) |
Protected Types | |
| typedef std::vector< BaseSemantics::RiscOperatorsPtr > | Subdomains |
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()) | |
Protected Attributes | |
| Subdomains | subdomains |
| std::vector< bool > | active |
| Formatter | formatter |
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
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inlinestatic |
Static allocating constructor.
This constructor creates a new MultiDomain RiscOperators object that does't have any subdomains. The subdomains should be added before using this object. The regdict argument is not used in this class and is only present for consistency with other classes and for subclasses.
Definition at line 271 of file MultiSemantics2.h.
References Rose::BinaryAnalysis::InstructionSemantics2::MultiSemantics::SValue::instance().
Referenced by create().
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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 287 of file MultiSemantics2.h.
References instance(), and Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators::solver().
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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 292 of file MultiSemantics2.h.
References instance(), and Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators::solver().
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virtual |
Add a subdomain to this MultiSemantics domain.
Returns the identifier (index) used for this subdomain. The name is optional and used mostly for debugging; it is also added to the formatter and can be used when printing a semantic value. The activate argument indicates whether this subdomain is activated (default is true). Activated subdomains will participate in RISC operations if their arguments are defined. See also, is_active(), set_active(), and clear_active().
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inlinevirtual |
Returns a formatter containing the names of the subdomains.
Definition at line 313 of file MultiSemantics2.h.
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inlinevirtual |
Returns the number of subdomains added to this MultiDomain.
Definition at line 318 of file MultiSemantics2.h.
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virtual |
Returns the RiscOperators for a subdomain.
The idx need not be valid.
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inlinevirtual |
Returns true if a subdomain is active.
Active subdomains participate in MultiSemantics RISC operations, provided all their operands are valid. This method returns false if idx is out of range or the subdomain's RiscOperators are null.
Definition at line 328 of file MultiSemantics2.h.
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inlinevirtual |
Makes a subdomain inactive.
The subdomain's RiscOperators object is not removed or deleted by this method; the subdomain can be made active again at a later time.
Definition at line 334 of file MultiSemantics2.h.
References set_active().
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virtual |
Makes a subdomain active or inactive.
When making a subdomain inactive, its RiscOperators object is not removed or deleted, and it can be reactivated later. An invalid idx is ignored when deactivating; it must refer to a valid subdomain when activating.
Referenced by clear_active().
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inlinevirtual |
Called before each subdomain RISC operation.
The default implementation does nothing, but subclasses can override this to do interesting things. The idx is the index of the subdomain that's about to be called.
Definition at line 345 of file MultiSemantics2.h.
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inlinevirtual |
Called after each subdomain RISC operation.
The default implementation does nothing, but subclasses can override this to do interesting things. The idx is the index of the subdomain that was just called.
Definition at line 349 of file MultiSemantics2.h.
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inlinevirtual |
Convenience function for SValue::create_empty().
Definition at line 352 of file MultiSemantics2.h.
References Rose::BinaryAnalysis::InstructionSemantics2::MultiSemantics::SValue::promote(), and Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators::protoval().
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virtual |
Called at the beginning of every instruction.
This method is invoked every time the translation object begins processing an instruction. Some policies use this to update a pointer to the current instruction.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
Called at the end of every instruction.
This method is invoked whenever the translation object ends processing for an instruction. This is not called if there's an exception during processing.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
Returns a new undefined value.
Uses the prototypical value to virtually construct the new value.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
Returns a number of the specified bit width.
Uses the prototypical value to virtually construct a new value.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
Returns a Boolean value.
Uses the prototypical value to virtually construct a new value.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
Returns a data-flow bottom value.
Uses the prototypical value to virtually construct a new value.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
Invoked to filter call targets.
This method is called whenever the translation object is about to invoke a function call. The target address is passed as an argument and a (new) target should be returned.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
Invoked to filter return targets.
This method is called whenever the translation object is about to return from a function call (such as for the x86 "RET" instruction). The return address is passed as an argument and a (new) return address should be returned.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
Invoked to filter indirect jumps.
This method is called whenever the translation object is about to unconditionally jump to a new address (such as for the x86 "JMP" instruction). The target address is passed as an argument and a (new) target address should be returned.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
One's complement.
The result will be the same size as the operand.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
Concatenates the bits of two values.
The bits of a and b are concatenated so that the result has b in the high-order bits and a in the low order bits. The width of the return value is the sum of the widths of a and b.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
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 regardles of whether the implementation makes that a special case or handles it naturally.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
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 regardles of whether the implementation makes that a special case or handles it naturally.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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virtual |
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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Determines whether a value is equal to zero.
Returns true, false, or undefined (in the semantic domain) depending on whether argument is zero.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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If-then-else.
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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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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::InstructionSemantics2::BaseSemantics::RiscOperators.
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Sign extends a value.
The result will the the specified new_width, which must be at least as large as the original width.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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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.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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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:
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.
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Two's complement.
The return value will have the same width as the operand.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Divides two signed values.
The width of the result will be the same as the width of operand a.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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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.
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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.
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Divides two unsigned values.
The width of the result is the same as the width of operand a.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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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.
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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.
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Construct a floating-point value from an integer value.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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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.
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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::InstructionSemantics2::BaseSemantics::RiscOperators.
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Whether a floating-point value is a special not-a-number bit pattern.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Whether a floating-point value is denormalized.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Whether a floating-point value is equal to zero.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Whether a floating-point value is infinity.
Returns true if the floating point value is plus or minus infinity. Querying the sign bit will return the sign of the infinity.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Sign of floating-point value.
Returns the value of the floating-point sign bit.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Exponent of floating-point value.
Returns the exponent of the floating point value. For normalized values this returns the stored exponent minus the exponent bias. For denormalized numbers this returns the stored exponent minus the exponent bias minus an additional amount to normalize the significand.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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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.
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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.
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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.
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Divide one floating-point value by another.
Computes a divided by b and returns the result. All three floating-point values have the same type.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Square root.
Computes and returns the square root of the specified floating-point value. Both values have the same type.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Round toward zero.
Truncate the fractional part of the floating point number.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
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Reads a value from a register.
The base implementation simply delegates to the current semantic State, which probably delegates to a register state, but subclasses are welcome to override this behavior at any level.
A register state will typically implement storage for hardware registers, but higher layers (the State, RiscOperators, Dispatcher, ...) should not be concerned about the size of the register they're trying to read. For example, a register state for a 32-bit x86 architecture will likely have a storage location for the 32-bit EAX register, but it should be possible to ask readRegister to return the value of AX (the low-order 16-bits). In order to accomplish this, some level of the readRegister delegations needs to invoke extract to obtain the low 16 bits. The RiscOperators object is passed along the delegation path for this purpose. The inverse concat operation will be needed at some level when we ask readRegister to return a value that comes from multiple storage locations in the register state (such as can happen if an x86 register state holds individual status flags and we ask for the 32-bit EFLAGS register).
If the register state can distinguish between a register that has never been accessed and a register that has only been read, then the dflt value is stored into the register the first time it's read. This ensures that reading the register a second time with no intervening write will return the same value as the first read. If a dflt is not provided then one is constructed by invoking undefined_.
There needs to be a certain level of cooperation between the RiscOperators, State, and register state classes to decide which layer should invoke the extract or concat (or whatever other RISC operations might be necessary).
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
Reimplemented in Rose::BinaryAnalysis::InstructionSemantics2::DataFlowSemantics::RiscOperators.
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Obtain a register value without side effects.
This is a lower-level operation than readRegister in that it doesn't cause the register to be marked as having been read. It is typically used in situations where the register is being accessed for analysis purposes rather than as part of an instruction emulation.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
Reimplemented in Rose::BinaryAnalysis::InstructionSemantics2::DataFlowSemantics::RiscOperators.
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Writes a value to a register.
The base implementation simply delegates to the current semantic State, which probably delegates to a register state, but subclasses are welcome to override this behavior at any level.
As with readRegister, writeRegister may need to perform various RISC operations in order to accomplish the task of writing a value to the specified register when the underlying register state doesn't actually store a value for that specific register. The RiscOperations object is passed along for that purpose. See readRegister for more details.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RiscOperators.
Reimplemented in Rose::BinaryAnalysis::InstructionSemantics2::DataFlowSemantics::RiscOperators.
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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 import 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.
Reimplemented in Rose::BinaryAnalysis::InstructionSemantics2::DataFlowSemantics::RiscOperators.
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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.
Reimplemented in Rose::BinaryAnalysis::InstructionSemantics2::DataFlowSemantics::RiscOperators.
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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.
Reimplemented in Rose::BinaryAnalysis::InstructionSemantics2::DataFlowSemantics::RiscOperators.
The documentation for this class was generated from the following file:
