Package ghidra.program.model.address

Class OverlayAddressSpace

java.lang.Object
ghidra.program.model.address.OverlayAddressSpace
All Implemented Interfaces:
AddressSpace, Comparable<AddressSpace>
Direct Known Subclasses:
ProgramOverlayAddressSpace
public abstract class OverlayAddressSpace extends Object

  • Field Details

    • OV_SEPARATER

      public static final String OV_SEPARATER
      See Also:

    • minOffset

      protected final long minOffset

    • maxOffset

      protected long maxOffset

    • minAddress

      protected final Address minAddress

    • maxAddress

      protected Address maxAddress

    • spaceSize

      protected long spaceSize

    • spaceID

      protected final int spaceID

  • Constructor Details

    • OverlayAddressSpace

      public OverlayAddressSpace(AddressSpace baseSpace, int unique, String orderedKey)
      Construction an overlay address space instance.
      Parameters:
      baseSpace - base overlayed address space
      unique - unique index/sequence number
      orderedKey - unique ordered key which should generally match overlay name unless already used (e.g., on a renamed overlay space). This associated value should not be changed for a given address factory instance.

  • Method Details

    • getOrderedKey

      public String getOrderedKey()
      Get the ordered key assigned to this overlay address space instance This value is used when performing equals(Object) and Comparable.compareTo(AddressSpace) operations.

      If this value does not have its optimal value (i.e., same as address space name), the associated AddressFactory should report a stale overlay condition.

      Returns:
      instance ordered key

    • getAddress

      public Address getAddress(String addrString, boolean caseSensitive) throws AddressFormatException
      Description copied from interface: AddressSpace
      Parses the String into an address within this address space.
      Specified by:
      getAddress in interface AddressSpace
      Parameters:
      addrString - the string to parse as an address.
      caseSensitive - specifies if addressSpace names must match case.
      Returns:
      an address if the string parsed successfully or null if the AddressSpace specified in the addrString is not this space.
      Throws:
      AddressFormatException - if the string cannot be parsed or the parsed offset is larger than the size for this space.

    • subtract

      public long subtract(Address addr1, Address addr2)
      Description copied from interface: AddressSpace
      Calculates the displacement between addr1 and addr2 (addr1 - addr2)
      Specified by:
      subtract in interface AddressSpace
      Parameters:
      addr1 - the address to subtract from.
      addr2 - the address to subtract.
      Returns:
      the difference. (addr1.offset - addr2.offset).

    • isOverlaySpace

      public boolean isOverlaySpace()
      Description copied from interface: AddressSpace
      Returns true if this addressSpace is an OverlayAddressSpace
      Specified by:
      isOverlaySpace in interface AddressSpace

    • getOverlayedSpace

      public AddressSpace getOverlayedSpace()
      Get the overlayed (i.e., underlying) base space associated with this overlay space.
      Returns:
      overlayed base space.

    • getPhysicalSpace

      public AddressSpace getPhysicalSpace()
      Description copied from interface: AddressSpace
      Returns the physical space associated with an address space. There is always exactly one physical space associated with an address space (it may be its own physical space).
      Specified by:
      getPhysicalSpace in interface AddressSpace
      Returns:
      the associated physical space.

    • hasMappedRegisters

      public boolean hasMappedRegisters()
      Description copied from interface: AddressSpace
      Returns true if this space has registers that are mapped into it. This means that registers could actually have pointers to them.
      Specified by:
      hasMappedRegisters in interface AddressSpace
      Returns:
      true if this space has any registers mapped in it.

    • contains

      public abstract boolean contains(long offset)
      Determine if the specified offset is contained within a defined region of this overlay space.
      Parameters:
      offset - unsigned address offset
      Returns:
      true if contained within defined region otherwise false

    • getOverlayAddressSet

      public abstract AddressSetView getOverlayAddressSet()
      Get the AddressSet which corresponds to overlayed physical region which corresponds to the defined overlay regions within the overlay (i.e., overlay blocks).
      Returns:
      defined regions within the overlay. All addresses are overlay addresses.

    • getAddressInThisSpaceOnly

      public Address getAddressInThisSpaceOnly(long offset)
      Description copied from interface: AddressSpace
      Get a byte address from this address space. Don't allow overlay spaces to remap the address into a base space when the address is not contained in the bounds of the overlay region.
      Parameters:
      offset - the byte offset for the new address.
      Returns:
      an address if the offset is valid.

    • getAddress

      public Address getAddress(long offset)
      Description copied from interface: AddressSpace
      Returns a new address in this space with the given byte offset. NOTE: This method is the same as invoking getAddress(long byteOffset, false).
      Parameters:
      offset - the byte offset for the new address.
      Returns:
      address with given byte offset

    • getUncheckedAddress

      protected Address getUncheckedAddress(long offset)
      Instantiates an address within this space. No offset validation should be performed.
      Parameters:
      offset - address offset
      Returns:
      requested unchecked address

    • getOverlayAddress

      public Address getOverlayAddress(Address addr)
      No overlay translation necessary, this is a base addressSpace. (non-Javadoc)
      Specified by:
      getOverlayAddress in interface AddressSpace
      Parameters:
      addr - address possibly falling within this overlay space.
      Returns:
      an address relative to this overlay
      See Also:

    • translateAddress

      public Address translateAddress(Address addr)
      If the given address is outside the overlay block, then the address is tranlated to an address in the base space with the same offset, otherwise (if the address exists in the overlay block), it is returned
      Parameters:
      addr - the address to translate to the base space if it is outside the overlay block
      Returns:
      either the given address if it is contained in the overlay memory block or an address in the base space with the same offset as the given address.

    • translateAddress

      public Address translateAddress(Address addr, boolean forceTranslation)
      Tranlated an overlay-space address (addr, which may exceed the bounds of the overlay space) to an address in the base space with the same offset. If forceTranslation is false and addr is contained within the overlay-space the original addr is returned.
      Parameters:
      addr - the address to translate to the base space
      forceTranslation - if true addr will be translated even if addr falls within the bounds of this overlay-space.
      Returns:
      either the given address if it is contained in the overlay memory block or an address in the base space with the same offset as the given address.

    • getBaseSpaceID

      public int getBaseSpaceID()
      Returns:
      the ID of the address space underlying this space

    • toString

      public String toString()

    • equals

      public final boolean equals(Object obj)

    • hasSignedOffset

      public boolean hasSignedOffset()
      Description copied from interface: AddressSpace
      Returns true if space uses signed offset
      Specified by:
      hasSignedOffset in interface AddressSpace

    • getSize

      public int getSize()
      Description copied from interface: AddressSpace
      Returns the number of bits that are used to form the address. Thus the maximum offset for this address space will be 2^size-1.
      Specified by:
      getSize in interface AddressSpace

    • getAddressableUnitSize

      public int getAddressableUnitSize()
      Description copied from interface: AddressSpace
      Returns the number of data bytes which correspond to each addressable location within this space (i.e., word-size in bytes). NOTE: When transforming a byte-offset to an addressable word offset the method AddressSpace.getAddressableWordOffset(long) should be used instead of simple division. When transforming an addressable word-offset to a byte-offset simple multiplication may be used. Neither of these transformations perform address space bounds checking. 
         byteOffset = wordOffset * addressUnitSize
   wordOffset = getAddressableWordOffset(byteOffset)
      Specified by:
      getAddressableUnitSize in interface AddressSpace

    • getAddressableWordOffset

      public long getAddressableWordOffset(long byteOffset)
      Description copied from interface: AddressSpace
      Get the addressable memory word offset which corresponds to the specified memory byte offset. This method handles some of the issues of unsigned math when stuck using Java's signed long primitives. No space bounds checking is performed.
      Specified by:
      getAddressableWordOffset in interface AddressSpace
      Parameters:
      byteOffset - memory byte offset
      Returns:
      addressable memory word offset

    • getPointerSize

      public int getPointerSize()
      Description copied from interface: AddressSpace
      Returns the absolute size of a pointer into this space (in bytes).
      Specified by:
      getPointerSize in interface AddressSpace
      See Also:

    • getType

      public int getType()
      Description copied from interface: AddressSpace
      Returns the type of this address space
      Specified by:
      getType in interface AddressSpace

    • getUnique

      public int getUnique()
      Returns the unique id value for this space.
      Specified by:
      getUnique in interface AddressSpace

    • getAddress

      public final Address getAddress(String addrString) throws AddressFormatException
      Description copied from interface: AddressSpace
      Parses the String into an address within this address space.
      Specified by:
      getAddress in interface AddressSpace
      Parameters:
      addrString - the string to parse as an address.
      Returns:
      an address if the string parsed successfully or null if the AddressSpace specified in the addrString is not this space.
      Throws:
      AddressFormatException - if the string cannot be parsed or the parsed offset is larger than the size for this space.

    • getAddress

      public Address getAddress(long offset, boolean isAddressableWordOffset) throws AddressOutOfBoundsException
      Description copied from interface: AddressSpace
      Returns a new address in this space with the given offset. NOTE: for those spaces with an addressable unit size other than 1, the address returned may not correspond to an addressable unit/word boundary if a byte-offset is specified.
      Specified by:
      getAddress in interface AddressSpace
      Parameters:
      offset - the offset for the new address.
      isAddressableWordOffset - if true the specified offset is an addressable unit/word offset, otherwise offset is a byte offset. See AddressSpace.getAddressableUnitSize() to understand the distinction (i.e., wordOffset = byteOffset * addressableUnitSize).
      Returns:
      address with given offset
      Throws:
      AddressOutOfBoundsException - if the offset is less than 0 or greater than the max offset allowed for this space.

    • getTruncatedAddress

      public Address getTruncatedAddress(long offset, boolean isAddressableWordOffset)
      Description copied from interface: AddressSpace
      Returns a new address in this space with the given offset. The specified offset will be truncated within the space and will not throw an exception. NOTE: for those spaces with an addressable unit size other than 1, the address returned may not correspond to a word boundary (addressable unit) if a byte-offset is specified.
      Specified by:
      getTruncatedAddress in interface AddressSpace
      Parameters:
      offset - the offset for the new address.
      isAddressableWordOffset - if true the specified offset is an addressable unit/word offset, otherwise offset is a byte offset. See AddressSpace.getAddressableUnitSize() to understand the distinction (i.e., wordOffset = byteOffset * addressableUnitSize).
      Returns:
      address with given byte offset truncated to the physical space size

    • subtractWrap

      public Address subtractWrap(Address addr, long displacement)
      Description copied from interface: AddressSpace
      Creates a new address by subtracting displacement from addr's offset.
      Specified by:
      subtractWrap in interface AddressSpace
      Parameters:
      addr - the original address. The new address will wrap in a manner that depends on the address space. For a generic address space this will wrap at the extents of the address space. For a segmented address space it will wrap at the extents of the segment.
      displacement - the displacement to subtract.
      Returns:
      a new address created by subtracting the displacement from addr.offset.

    • subtractWrapSpace

      public Address subtractWrapSpace(Address addr, long displacement)
      Description copied from interface: AddressSpace
      Creates a new address by subtracting the displacement from the given address. If the offset is greater than the max offset of the address space, the high order bits are masked off, making the address wrap. For non-segmented addresses this will be the same as subtractWrap(). For segmented addresses, the address will wrap when the 20 bit (oxfffff) offset is exceeded, as opposed to when the segment offset is exceeded.
      Specified by:
      subtractWrapSpace in interface AddressSpace
      Parameters:
      addr - the address to subtract the displacement from.
      displacement - the displacement to subtract.
      Returns:
      The new Address formed by subtracting the displacement from the specified address.

    • subtractNoWrap

      public Address subtractNoWrap(Address addr, long displacement) throws AddressOverflowException
      Description copied from interface: AddressSpace
      Creates a new address by subtracting displacement from addr's offset. The new offset will NOT wrap!
      Specified by:
      subtractNoWrap in interface AddressSpace
      Parameters:
      addr - the original address
      displacement - the displacement to subtract.
      Returns:
      The new address created by subtracting displacement from addr.offset.
      Throws:
      AddressOverflowException - if the subtraction would cause a wrap,

    • subtract

      public Address subtract(Address addr, long displacement)
      Description copied from interface: AddressSpace
      Creates a new address (possibly in a new space) by subtracting the given displacement from the given address.
      Specified by:
      subtract in interface AddressSpace
      Parameters:
      addr - original address being subtracted from
      displacement - amount to subtract
      Returns:
      the new address

    • addWrap

      public Address addWrap(Address addr, long displacement)
      Description copied from interface: AddressSpace
      Creates a new address by adding displacement to the given address. The resulting address may wrap. The new address will wrap in a manner that depends on the address space. For a generic address space this will wrap at the extents of the address space. For a segmented address space it will wrap at the extents of the segment.
      Specified by:
      addWrap in interface AddressSpace
      Parameters:
      addr - the original address.
      displacement - the displacement to add.
      Returns:
      the new address created by adding displacement to addr.offset.

    • addWrapSpace

      public Address addWrapSpace(Address addr, long displacement)
      Description copied from interface: AddressSpace
      Creates a new address by adding the displacement to the given address. If the offset is greater than the max offset of the address space, the high order bits are masked off, making the address wrap. For non-segmented addresses this will be the same as addWrap(). For segmented addresses, the address will wrap when the 20 bit (oxfffff) offset is exceeded, as opposed to when the segment offset is exceeded.
      Specified by:
      addWrapSpace in interface AddressSpace
      Parameters:
      addr - the address to add the displacement to.
      displacement - the displacement to add.
      Returns:
      The new Address formed by adding the displacement to the specified addresst.

    • addNoWrap

      public Address addNoWrap(Address addr, long displacement) throws AddressOverflowException
      Description copied from interface: AddressSpace
      Creates a new address by adding displacement to the given address. The new address will NOT wrap!
      Specified by:
      addNoWrap in interface AddressSpace
      Parameters:
      addr - the original address.
      displacement - the displacement to add.
      Returns:
      The new address created by adding displacement to addr.offset.
      Throws:
      AddressOverflowException - if the addition would cause a wrap,

    • addNoWrap

      public Address addNoWrap(GenericAddress addr, BigInteger displacement) throws AddressOverflowException
      Description copied from interface: AddressSpace
      Creates a new address by adding displacement to the given address. The new address will NOT wrap!
      Specified by:
      addNoWrap in interface AddressSpace
      Parameters:
      addr - the original address.
      displacement - the displacement to add.
      Returns:
      The new address created by adding displacement to addr.offset.
      Throws:
      AddressOverflowException - if the addition would cause a wrap,

    • add

      public Address add(Address addr, long displacement) throws AddressOutOfBoundsException
      Description copied from interface: AddressSpace
      Creates a new address (possibly in a new space) by adding the given displacement from the given address.
      Specified by:
      add in interface AddressSpace
      Parameters:
      addr - original address being subtracted from
      displacement - amount to subtract
      Returns:
      the new address
      Throws:
      AddressOutOfBoundsException - if the result does not correspond to any address.

    • isValidRange

      public boolean isValidRange(long byteOffset, long length)
      Description copied from interface: AddressSpace
      Check the specified address range for validity within this space. Segmented spaces will restrict a range to a single segment.
      Specified by:
      isValidRange in interface AddressSpace
      Parameters:
      byteOffset -
      length -
      Returns:
      true if range is valid for this space

    • isSuccessor

      public boolean isSuccessor(Address addr1, Address addr2)
      Description copied from interface: AddressSpace
      Tests whether addr2 immediately follows addr1.
      Specified by:
      isSuccessor in interface AddressSpace
      Parameters:
      addr1 - the first address.
      addr2 - the second address.

    • getMaxAddress

      public Address getMaxAddress()
      Description copied from interface: AddressSpace
      Get the maximum address allowed for this AddressSpace. NOTE: Use of this method to identify the region associated with an overlay memory block within its overlay address space is no longer supported. Defined regions of an overlay space may now be determined using getOverlayAddressSet().
      Specified by:
      getMaxAddress in interface AddressSpace
      Returns:
      maximum address of this address space.

    • getMinAddress

      public Address getMinAddress()
      Description copied from interface: AddressSpace
      Get the minimum address allowed for this AddressSpace. For a memory space the returned address will have an offset of 0 within this address space. NOTE: Use of this method to identify the region associated with an overlay memory block within its overlay address space is no longer supported. Defined regions of an overlay space may now be determined using getOverlayAddressSet().
      Specified by:
      getMinAddress in interface AddressSpace
      Returns:
      minimum address of this address space.

    • compareTo

      public int compareTo(AddressSpace space)
      Specified by:
      compareTo in interface Comparable<AddressSpace>

    • hashCode

      public final int hashCode()
      Overrides:
      hashCode in class Object

    • getSpaceID

      public int getSpaceID()
      Description copied from interface: AddressSpace
      Get the ID for this space
      Specified by:
      getSpaceID in interface AddressSpace
      Returns:
      space ID

    • testAddressSpace

      protected void testAddressSpace(Address addr)

    • showSpaceName

      public boolean showSpaceName()
      Description copied from interface: AddressSpace
      Returns true if the address should display its addressSpace name.
      Specified by:
      showSpaceName in interface AddressSpace

    • makeValidOffset

      public long makeValidOffset(long offset) throws AddressOutOfBoundsException
      Description copied from interface: AddressSpace
      Tests if the offset if valid. If the space is signed, then it sign extends the offset.
      Specified by:
      makeValidOffset in interface AddressSpace
      Parameters:
      offset - the offset to test and/or sign extend
      Returns:
      the valid positive offset or appropriate sign extended offset.
      Throws:
      AddressOutOfBoundsException - if offset is invalid

    • truncateOffset

      public long truncateOffset(long offset)
      Description copied from interface: AddressSpace
      Truncate the specified byte offset within this space to produce a valid offset.
      Specified by:
      truncateOffset in interface AddressSpace
      Parameters:
      offset - any byte offset
      Returns:
      truncated byte offset

    • truncateAddressableWordOffset

      public long truncateAddressableWordOffset(long wordOffset)
      Description copied from interface: AddressSpace
      Truncate the specified addressable unit/word offset within this space to produce a valid offset.
      Specified by:
      truncateAddressableWordOffset in interface AddressSpace
      Parameters:
      wordOffset - any addressable unit/word offset
      Returns:
      truncated word offset

    • isMemorySpace

      public boolean isMemorySpace()
      Description copied from interface: AddressSpace
      Returns true if this space represents a memory address. NOTE: It is important to make the distinction between Loaded and Non-Loaded memory addresses. Program importers may create memory blocks associated with Non-Loaded file content which are not associated with processor defined memory regions. While Loaded file content is placed into memory blocks which are associated with specific memory address spaces defined by the processor language specification.
      Specified by:
      isMemorySpace in interface AddressSpace
      See Also:

    • isLoadedMemorySpace

      public boolean isLoadedMemorySpace()
      Description copied from interface: AddressSpace
      Returns true if this space represents a Loaded Memory region (e.g., processor RAM).
      Specified by:
      isLoadedMemorySpace in interface AddressSpace

    • isNonLoadedMemorySpace

      public boolean isNonLoadedMemorySpace()
      Description copied from interface: AddressSpace
      Returns true if this space represents a Non-Loaded storage region for retaining non-loaded file data (e.g., OTHER)
      Specified by:
      isNonLoadedMemorySpace in interface AddressSpace

    • isHashSpace

      public boolean isHashSpace()
      Description copied from interface: AddressSpace
      Returns true if this space represents a location in the HASH space.
      Specified by:
      isHashSpace in interface AddressSpace

    • isRegisterSpace

      public boolean isRegisterSpace()
      Description copied from interface: AddressSpace
      Returns true if this space represents a register location
      Specified by:
      isRegisterSpace in interface AddressSpace

    • isStackSpace

      public boolean isStackSpace()
      Description copied from interface: AddressSpace
      Returns true if this space represents a stack location
      Specified by:
      isStackSpace in interface AddressSpace

    • isUniqueSpace

      public boolean isUniqueSpace()
      Description copied from interface: AddressSpace
      Returns true if this space in the unique space
      Specified by:
      isUniqueSpace in interface AddressSpace

    • isConstantSpace

      public boolean isConstantSpace()
      Description copied from interface: AddressSpace
      Returns true if this space in the constant space
      Specified by:
      isConstantSpace in interface AddressSpace

    • isVariableSpace

      public boolean isVariableSpace()
      Description copied from interface: AddressSpace
      Returns true if this space represents a variable location
      Specified by:
      isVariableSpace in interface AddressSpace

    • isExternalSpace

      public boolean isExternalSpace()
      Description copied from interface: AddressSpace
      Returns true if this space in the EXTERNAL_SPACE
      Specified by:
      isExternalSpace in interface AddressSpace

    • setShowSpaceName

      public void setShowSpaceName(boolean b)

    • setHasMappedRegisters

      public void setHasMappedRegisters(boolean hasRegisters)
      Tag this memory space as having memory mapped registers
      Parameters:
      hasRegisters - true if it has registers, false otherwise