Package ghidra.program.disassemble

Class 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.

    • 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 - if failed to modifiy context across specified range (e.g., instruction exists).

      • 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.
        start - start of address range to search
        end - end of address range to search
        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.
        Parameters:
        register - program register
        addr - program address
        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.
        start - start of address range to search
        end - end of address range to search
        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 - thrown if context change not permitted over specified range (e.g., instructions exist)

      • 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.
        Parameters:
        address - program address
        Returns:
        disassembly context register value