Package ghidra.program.disassemble

Class Disassembler.DisassemblerProgramContext

java.lang.Object

ghidra.program.util.AbstractProgramContext

ghidra.program.disassemble.Disassembler.DisassemblerProgramContext

All Implemented Interfaces:

DefaultProgramContext, ProgramContext

Enclosing class:

Disassembler

protected class Disassembler.DisassemblerProgramContext
extends AbstractProgramContext

DisassemblerProgramContext is used as a proxy program context due to the delayed nature of laying down instructions and their associated context state. This is used to track context not yet committed for use by the DisassemblerContext in place of the true program context.

Field Summary

Fields inherited from class ghidra.program.util.AbstractProgramContext

baseContextRegister, defaultDisassemblyContext, registerNameMap, registers

Method Summary

Modifier and Type	Method	Description
AddressRangeIterator	getDefaultRegisterValueAddressRanges(Register register)	Returns an AddressRangeIterator over all addresses that have an associated default value for the given register.
AddressRangeIterator	getDefaultRegisterValueAddressRanges(Register register, Address start, Address end)	Returns an AddressRangeIterator over all addresses that have an associated default value within the given range for the given register.
RegisterValue	getDefaultValue(Register register, Address address)	Returns the default value of a register at a given address.
RegisterValue	getDisassemblyContext(Address address)	Get the disassembly context for a specified address.
RegisterValue	getNonDefaultValue(Register register, Address address)	Returns the (non-default)value assigned to a register at a given address.
Register[]	getRegistersWithValues()	Returns an array of all registers that at least one value associated with an address.
RegisterValue	getRegisterValue(Register register, Address address)	Returns a register value and mask for the given register.
AddressRangeIterator	getRegisterValueAddressRanges(Register register)	Returns an AddressRangeIterator over all addresses that have an associated value for the given register.
AddressRangeIterator	getRegisterValueAddressRanges(Register register, Address start, Address end)	Returns an AddressRangeIterator over all addresses that have an associated value within the given range for the given register.
AddressRange	getRegisterValueRangeContaining(Register register, Address addr)	Returns the bounding address-range containing addr and the the same RegisterValue throughout.
java.math.BigInteger	getValue(Register register, Address address, boolean signed)	Returns the value assigned to a register at a given address.
boolean	hasValueOverRange(Register reg, java.math.BigInteger value, AddressSetView addrSet)	Returns true if the given register has the value over the addressSet
void	remove(Address start, Address end, Register register)	Remove (unset) the register values for a given address range.
void	setDefaultValue(RegisterValue registerValue, Address start, Address end)	Associates a default value with the given register over the given range.
void	setRegisterValue(Address start, Address end, RegisterValue value)	Sets the register context over the given range to the given value.
void	setValue(Register register, Address start, Address end, java.math.BigInteger value)	Associates a value with a register over a given address range.

Methods inherited from class ghidra.program.util.AbstractProgramContext

getBaseContextRegister, getDefaultDisassemblyContext, getFlowValue, getNonFlowValue, getProcessorStateRegisters, getRegister, getRegisterNames, getRegisters, hasNonFlowingContext, initNameMap, setDefaultDisassemblyContext

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getRegistersWithValues

public Register[] getRegistersWithValues()

Description copied from interface: ProgramContext

Returns an array of all registers that at least one value associated with an address.

Returns:

a array of all registers that at least one value associated with an address.

getValue

public java.math.BigInteger getValue(Register register,
                                     Address address,
                                     boolean signed)

Description copied from interface: ProgramContext

Returns the value assigned to a register at a given address. This method will return any default value assigned to the register at the given address if no explicit value has been set at that address.

Parameters:

register - the register for which to get its value.

address - the address at which to get a value.

signed - if true, interprets the fix-bit size register value as a signed value.

Returns:

a BigInteger object containing the value of the registe at the given address or null if no value has been assigned.

getRegisterValue

public RegisterValue getRegisterValue(Register register,
                                      Address address)

Description copied from interface: ProgramContext

Returns a register value and mask for the given register.

Parameters:

register - the register

address - the address of the value

Returns:

a register value and mask for the given register

setRegisterValue

public void setRegisterValue(Address start,
                             Address end,
                             RegisterValue value)

Description copied from interface: ProgramContext

Sets the register context over the given range to the given value.

Parameters:

start - the start address to set values

end - the end address to set values

value - the actual values to store at address

getNonDefaultValue

public RegisterValue getNonDefaultValue(Register register,
                                        Address address)

Description copied from interface: ProgramContext

Returns the (non-default)value assigned to a register at a given address.

Parameters:

register - the register for which to get its value.

address - the address at which to get a value.

Returns:

a RegisterValue object containing the value of the register at the given address or possibly null if no value has been assigned.

setValue

public void setValue(Register register,
                     Address start,
                     Address end,
                     java.math.BigInteger value)
              throws ContextChangeException

Description copied from interface: ProgramContext

Associates a value with a register over a given address range. Any previous values will be overwritten.

Parameters:

register - the register for which to assign a value.

start - the start address.

end - the end address (inclusive).

value - the value to assign. A value of null will effective clear any existing values.

Throws:

ContextChangeException

getRegisterValueAddressRanges

public AddressRangeIterator getRegisterValueAddressRanges(Register register)

Description copied from interface: ProgramContext

Returns an AddressRangeIterator over all addresses that have an associated value for the given register. Each range returned will have the same value associated with the register for all addresses in that range.

Parameters:

register - the register for which to get set value ranges.

Returns:

An AddressRangeIterator over all address that have values for the given register.

getRegisterValueAddressRanges

public AddressRangeIterator getRegisterValueAddressRanges(Register register,
                                                          Address start,
                                                          Address end)

Description copied from interface: ProgramContext

Returns an AddressRangeIterator over all addresses that have an associated value within the given range for the given register. Each range returned will have the same value associated with the register for all addresses in that range.

Parameters:

register - the register for which to get set value ranges.

Returns:

An AddressRangeIterator over all address within the given range that have values for the given register.

getRegisterValueRangeContaining

public AddressRange getRegisterValueRangeContaining(Register register,
                                                    Address addr)

Description copied from interface: ProgramContext

Returns the bounding address-range containing addr and the the same RegisterValue throughout. The range returned may be limited by other value changes associated with register's base-register.

Returns:

single register-value address-range containing addr

getDefaultRegisterValueAddressRanges

public AddressRangeIterator getDefaultRegisterValueAddressRanges(Register register)

Description copied from interface: ProgramContext

Returns an AddressRangeIterator over all addresses that have an associated default value for the given register. Each range returned will have the same default value associated with the register for all addresses in that range.

Parameters:

register - the register for which to get set default value ranges.

Returns:

An AddressRangeIterator over all address that have default values for the given register.

getDefaultRegisterValueAddressRanges

public AddressRangeIterator getDefaultRegisterValueAddressRanges(Register register,
                                                                 Address start,
                                                                 Address end)

Description copied from interface: ProgramContext

Returns an AddressRangeIterator over all addresses that have an associated default value within the given range for the given register. Each range returned will have the same default value associated with the register for all addresses in that range.

Parameters:

register - the register for which to get default value ranges.

Returns:

An AddressRangeIterator over all address within the given range that have default values for the given register.

setDefaultValue

public void setDefaultValue(RegisterValue registerValue,
                            Address start,
                            Address end)

Description copied from interface: DefaultProgramContext

Associates a default value with the given register over the given range.

Parameters:

registerValue - the register for which to associate a default value.

start - the start address.

end - the end address (inclusive)

remove

public void remove(Address start,
                   Address end,
                   Register register)
            throws ContextChangeException

Description copied from interface: ProgramContext

Remove (unset) the register values for a given address range.

Parameters:

start - starting address.

end - ending adddress.

register - handle to the register to be set.

Throws:

ContextChangeException

hasValueOverRange

public boolean hasValueOverRange(Register reg,
                                 java.math.BigInteger value,
                                 AddressSetView addrSet)

Description copied from interface: ProgramContext

Returns true if the given register has the value over the addressSet

Parameters:

reg - the register whose value is to be tested.

value - the value to test for.

addrSet - the set of addresses to test

Returns:

true if every address in the addrSet has the value.

getDefaultValue

public RegisterValue getDefaultValue(Register register,
                                     Address address)

Description copied from interface: ProgramContext

Returns the default value of a register at a given address.

Parameters:

register - the register for which to get a default value.

address - the address at which to get a default value.

Returns:

the default value of the register at the given address or null if no default value has been assigned.

getDisassemblyContext

public RegisterValue getDisassemblyContext(Address address)

Description copied from interface: ProgramContext

Get the disassembly context for a specified address. This context is formed from the default disassembly context and the context register value stored at the specified address. Those bits specified by the stored context value take precedence.

Returns:

disassembly context register value