Package ghidra.program.model.listing

Interface ProgramContext

All Known Implementing Classes:
AbstractProgramContext, AbstractStoredProgramContext, Disassembler.DisassemblerProgramContext, OldProgramContextDB, ProgramContextImpl, ProgramRegisterContextDB
public interface ProgramContext
Interface to define a processor register context over the address space.

  • Method Details

    • hasNonFlowingContext

      boolean hasNonFlowingContext()
      Returns:
      true if one or more non-flowing context registers fields have been defined within the base processor context register.

    • getFlowValue

      RegisterValue getFlowValue(RegisterValue value)
      Modify register value to eliminate non-flowing bits
      Parameters:
      value - register value to be modified
      Returns:
      value suitable for flowing

    • getNonFlowValue

      RegisterValue getNonFlowValue(RegisterValue value)
      Modify register value to only include non-flowing bits
      Parameters:
      value - register value to be modified
      Returns:
      new value or null

    • getRegister

      Register getRegister(String name)
      Get a Register object given the name of a register
      Parameters:
      name - the name of the register.
      Returns:
      The register with the given name or null if no register has that name.

    • getRegisters

      List<Register> getRegisters()
      Get all the register descriptions defined for this program context.
      Returns:
      unmodifiable list of defined register descriptions

    • getRegistersWithValues

      Register[] getRegistersWithValues()
      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

      BigInteger getValue(Register register, Address address, boolean signed)
      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

      RegisterValue getRegisterValue(Register register, Address address)
      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

      void setRegisterValue(Address start, Address end, RegisterValue value) throws ContextChangeException
      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
      Throws:
      ContextChangeException - if failed to modifiy context across specified range (e.g., instruction exists).

    • getNonDefaultValue

      RegisterValue getNonDefaultValue(Register register, Address address)
      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

      void setValue(Register register, Address start, Address end, BigInteger value) throws ContextChangeException
      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

      AddressRangeIterator getRegisterValueAddressRanges(Register register)
      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

      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. 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

      AddressRange getRegisterValueRangeContaining(Register register, Address addr)
      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

      AddressRangeIterator getDefaultRegisterValueAddressRanges(Register register)
      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

      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. 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.

    • getContextRegisters

      List<Register> getContextRegisters()
      Gets the registers for this context that are used for processor context states.
      Returns:
      all processor context registers

    • remove

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

    • getRegisterNames

      List<String> getRegisterNames()
      Get an alphabetical sorted unmodifiable list of original register names (including context registers). Names correspond to orignal register name and not aliases which may be defined.
      Returns:
      alphabetical sorted unmodifiable list of original register names.

    • hasValueOverRange

      boolean hasValueOverRange(Register reg, BigInteger value, AddressSetView addrSet)
      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

      RegisterValue getDefaultValue(Register register, Address address)
      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.

    • getBaseContextRegister

      Register getBaseContextRegister()
      Returns the base context register.
      Returns:
      the base context register.

    • getDefaultDisassemblyContext

      RegisterValue getDefaultDisassemblyContext()
      Returns:
      Get the current default disassembly context to be used when initiating disassmbly

    • setDefaultDisassemblyContext

      void setDefaultDisassemblyContext(RegisterValue value)
      Set the initial disassembly context to be used when initiating disassmbly
      Parameters:
      value - context register value

    • getDisassemblyContext

      RegisterValue getDisassemblyContext(Address address)
      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