Description
Null register state.
This register state does not store any values. Read operations always return (new) undefined values.
Definition at line 157 of file NullSemantics.h.
#include <Rose/BinaryAnalysis/InstructionSemantics2/NullSemantics.h>
Public Types | |
| using | Super = BaseSemantics::RegisterState |
| Base type. More... | |
| using | Ptr = RegisterStatePtr |
| Shared-ownership pointer. More... | |
 Public Types inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState | |
| using | Ptr = RegisterStatePtr |
| Shared-ownership pointer for a RegisterState object. More... | |
Public Member Functions | |
| virtual BaseSemantics::RegisterStatePtr | create (const BaseSemantics::SValuePtr &protoval, const RegisterDictionary *regdict) const override |
| Virtual constructor. More... | |
| virtual BaseSemantics::RegisterStatePtr | clone () const override |
| Make a copy of this register state. More... | |
| virtual bool | merge (const BaseSemantics::RegisterStatePtr &other_, BaseSemantics::RiscOperators *) override |
| Merge register states for data flow analysis. More... | |
| virtual void | clear () override |
| Removes stored values from the register state. More... | |
| virtual void | zero () override |
| Set all registers to the zero. More... | |
| virtual BaseSemantics::SValuePtr | readRegister (RegisterDescriptor reg, const BaseSemantics::SValuePtr &dflt, BaseSemantics::RiscOperators *ops) override |
| Read a value from a register. More... | |
| virtual BaseSemantics::SValuePtr | peekRegister (RegisterDescriptor reg, const BaseSemantics::SValuePtr &dflt, BaseSemantics::RiscOperators *ops) override |
| Read a register without side effects. More... | |
| virtual void | writeRegister (RegisterDescriptor reg, const BaseSemantics::SValuePtr &value, BaseSemantics::RiscOperators *ops) override |
| Write a value to a register. More... | |
| virtual void | hash (Combinatorics::Hasher &, BaseSemantics::RiscOperators *) const override |
| Hash the register state. More... | |
| virtual void | print (std::ostream &, BaseSemantics::Formatter &) const override |
| Print the register contents. More... | |
| Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState | |
| SValuePtr | protoval () const |
| Return the protoval. More... | |
| const RegisterDictionary * | get_register_dictionary () const ROSE_DEPRECATED("use registerDictionary property") |
| void | set_register_dictionary (const RegisterDictionary *rd) ROSE_DEPRECATED("use registerDictionary property") |
| MergerPtr | merger () const |
| Property: Merger. More... | |
| void | merger (const MergerPtr &m) |
| Property: Merger. More... | |
| const RegisterDictionary * | registerDictionary () const |
| Property: Register dictionary. More... | |
| void | registerDictionary (const RegisterDictionary *rd) |
| Property: Register dictionary. More... | |
| void | print (std::ostream &stream, const std::string prefix="") const |
| Print the register contents. More... | |
| WithFormatter | with_format (Formatter &fmt) |
| Used for printing register states with formatting. More... | |
| WithFormatter | operator+ (Formatter &fmt) |
| Used for printing register states with formatting. More... | |
| WithFormatter | operator+ (const std::string &linePrefix) |
| Used for printing register states with formatting. More... | |
Static Public Member Functions | |
| static RegisterStatePtr | instance (const BaseSemantics::SValuePtr &protoval, const RegisterDictionary *regdict) |
| static RegisterStatePtr | promote (const BaseSemantics::RegisterStatePtr &from) |
| Static Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState | |
| static RegisterStatePtr | promote (const RegisterStatePtr &x) |
Protected Member Functions | |
| RegisterState (const RegisterState &other) | |
| RegisterState (const BaseSemantics::SValuePtr &protoval, const RegisterDictionary *regdict) | |
| Protected Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState | |
| RegisterState (const SValuePtr &protoval, const RegisterDictionary *regdict) | |
Additional Inherited Members | |
| Protected Attributes inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState | |
| const RegisterDictionary * | regdict |
| Registers that are able to be stored by this state. More... | |
Member Typedef Documentation
| using Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::RegisterState::Super = BaseSemantics::RegisterState |
Base type.
Definition at line 160 of file NullSemantics.h.
| using Rose::BinaryAnalysis::InstructionSemantics2::NullSemantics::RegisterState::Ptr = RegisterStatePtr |
Shared-ownership pointer.
Definition at line 163 of file NullSemantics.h.
Member Function Documentation
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inlineoverridevirtual |
Virtual constructor.
The protoval argument must be a non-null pointer to a semantic value which will be used only to create additional instances of the value via its virtual constructors. The prototypical value is normally of the same type for all parts of a semantic analysis. The register state must be compatible with the rest of the binary analysis objects in use.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 177 of file NullSemantics.h.
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inlineoverridevirtual |
Make a copy of this register state.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 182 of file NullSemantics.h.
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inlineoverridevirtual |
Merge register states for data flow analysis.
Merges the other state into this state, returning true if this state changed.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 192 of file NullSemantics.h.
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inlineoverridevirtual |
Removes stored values from the register state.
Depending on the register state implementation, this could either store new, distinct undefined values in each register, or it could simply erase all information about stored values leaving the register state truly empty. For instance RegisterStateGeneric, which uses variable length arrays to store information about a dynamically changing set of registers, clears its arrays to zero length.
Register states can also be initialized by clearing them or by explicitly writing new values into each desired register (or both). See RegisterStateGeneric::initialize_nonoverlapping for one way to initialize that register state.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 196 of file NullSemantics.h.
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inlineoverridevirtual |
Set all registers to the zero.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 197 of file NullSemantics.h.
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inlineoverridevirtual |
Read a value from a register.
The register descriptor, reg, not only describes which register, but also which bits of that register (e.g., "al", "ah", "ax", "eax", and "rax" are all the same hardware register on an amd64, but refer to different parts of that register). The RISC operations are provided so that they can be used to extract the correct bits from a wider hardware register if necessary.
The dflt value is written into the register state if the register was not defined in the state. By doing this, a subsequent read of the same register will return the same value. Some register states cannot distinguish between a register that was never accessed and a register that was only read, in which case dflt is not used since all registers are already initialized.
See RiscOperators::readRegister for more details.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 200 of file NullSemantics.h.
References Rose::BinaryAnalysis::RegisterDescriptor::nBits(), and Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState::protoval().
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inlineoverridevirtual |
Read a register without side effects.
This is similar to readRegister except it doesn't modify the register state in any way.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 206 of file NullSemantics.h.
References Rose::BinaryAnalysis::RegisterDescriptor::nBits(), and Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState::protoval().
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inlineoverridevirtual |
Write a value to a register.
The register descriptor, reg, not only describes which register, but also which bits of that register (e.g., "al", "ah", "ax", "eax", and "rax" are all the same hardware register on an amd64, but refer to different parts of that register). The RISC operations are provided so that they can be used to insert the value bits into a wider the hardware register if necessary. See RiscOperators::readRegister for more details.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 211 of file NullSemantics.h.
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inlineoverridevirtual |
Hash the register state.
Hashes the register state by appending its data to the specified hasher.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 214 of file NullSemantics.h.
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inlineoverridevirtual |
Print the register contents.
This emits one line per register and contains the register name and its value.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::RegisterState.
Definition at line 216 of file NullSemantics.h.
The documentation for this class was generated from the following file:
