Package ghidra.program.model.address
Interface AddressSpace
- All Superinterfaces:
Comparable<AddressSpace>
- All Known Implementing Classes:
GenericAddressSpace
,OverlayAddressSpace
,ProgramOverlayAddressSpace
,ProtectedAddressSpace
,SegmentedAddressSpace
The AddressSpace class is used to represent a unique context for addresses. Programs can
have multiple address spaces and address 0 in one space is not the same as address 0 in
another space.
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Field Summary
Modifier and TypeFieldDescriptionstatic final AddressSpace
A language may only define a single REGISTER space.static final AddressSpace
TheEXTERNAL_SPACE
is used to contain all external locations (i.e., data and functions) defined within a given library namespace.static final AddressSpace
TheHASH_SPACE
provides a 60-bit space for encoding of unique hashcodes.static final int
static final int
static final int
static final int
static final AddressSpace
TheOTHER_SPACE
is used to store data from the original program file that doesn't get loaded into the final memory image and for user-defined spaces.static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final AddressSpace
TheVARIABLE_SPACE
is used to contain all variables and parameters defined within a given namespace (i.e., function). -
Method Summary
Modifier and TypeMethodDescriptionCreates a new address (possibly in a new space) by adding the given displacement from the given address.Creates a new address by adding displacement to the given address.addNoWrap
(GenericAddress addr, BigInteger displacement) Creates a new address by adding displacement to the given address.Creates a new address by adding displacement to the given address.addWrapSpace
(Address addr, long displacement) Creates a new address by adding the displacement to the given address.getAddress
(long byteOffset) Returns a new address in this space with the given byte offset.getAddress
(long offset, boolean isAddressableWordOffset) Returns a new address in this space with the given offset.getAddress
(String addrString) Parses the String into an address within this address space.getAddress
(String addrString, boolean caseSensitive) Parses the String into an address within this address space.int
Returns the number of data bytes which correspond to each addressable location within this space (i.e., word-size in bytes).long
getAddressableWordOffset
(long byteOffset) Get the addressable memory word offset which corresponds to the specified memory byte offset.getAddressInThisSpaceOnly
(long byteOffset) Get a byte address from this address space.Get the maximum address allowed for this AddressSpace.Get the minimum address allowed for this AddressSpace.getName()
Returns the name of this address space.getOverlayAddress
(Address addr) Get an address that is relative to this address space.Returns the physical space associated with an address space.int
Returns the absolute size of a pointer into this space (in bytes).int
getSize()
Returns the number of bits that are used to form the address.int
Get the ID for this spacegetTruncatedAddress
(long offset, boolean isAddressableWordOffset) Returns a new address in this space with the given offset.int
getType()
Returns the type of this address spaceint
Returns the unique index for this address spaceboolean
Returns true if this space has registers that are mapped into it.boolean
Returns true if space uses signed offsetboolean
Returns true if this space in the constant spaceboolean
Returns true if this space in the EXTERNAL_SPACEboolean
Returns true if this space represents a location in the HASH space.boolean
Returns true if this space represents represents a Loaded Memory region (e.g., processor RAM).boolean
Returns true if this space represents a memory address.boolean
Returns true if this space represents represents a Non-Loaded storage region for retaining non-loaded file data (e.g., OTHER)boolean
Returns true if this addressSpace is an OverlayAddressSpaceboolean
Returns true if this space represents a register locationboolean
Returns true if this space represents a stack locationboolean
isSuccessor
(Address addr1, Address addr2) Tests whether addr2 immediately follows addr1.boolean
Returns true if this space in the unique spacestatic boolean
isValidName
(String name) Determine if the specific name is a valid address space name (e.g., allowed overlay space name).boolean
isValidRange
(long byteOffset, long length) Check the specified address range for validity within this space.boolean
Returns true if this space represents a variable locationlong
makeValidOffset
(long offset) Tests if the offset if valid.boolean
Returns true if the address should display its addressSpace name.Creates a new address (possibly in a new space) by subtracting the given displacement from the given address.long
Calculates the displacement between addr1 and addr2 (addr1 - addr2)subtractNoWrap
(Address addr, long displacement) Creates a new address by subtracting displacement from addr's offset.subtractWrap
(Address addr, long displacement) Creates a new address by subtracting displacement from addr's offset.subtractWrapSpace
(Address addr, long displacement) Creates a new address by subtracting the displacement from the given address.long
truncateAddressableWordOffset
(long wordOffset) Truncate the specified addressable unit/word offset within this space to produce a valid offset.long
truncateOffset
(long byteOffset) Truncate the specified byte offset within this space to produce a valid offset.Methods inherited from interface java.lang.Comparable
compareTo
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Field Details
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TYPE_CONSTANT
static final int TYPE_CONSTANT- See Also:
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TYPE_RAM
static final int TYPE_RAM- See Also:
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TYPE_CODE
static final int TYPE_CODE- See Also:
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TYPE_UNIQUE
static final int TYPE_UNIQUE- See Also:
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TYPE_REGISTER
static final int TYPE_REGISTER- See Also:
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TYPE_STACK
static final int TYPE_STACK- See Also:
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TYPE_JOIN
static final int TYPE_JOIN- See Also:
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TYPE_OTHER
static final int TYPE_OTHER- See Also:
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TYPE_SYMBOL
static final int TYPE_SYMBOL- See Also:
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TYPE_EXTERNAL
static final int TYPE_EXTERNAL- See Also:
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TYPE_VARIABLE
static final int TYPE_VARIABLE- See Also:
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TYPE_DELETED
static final int TYPE_DELETED- See Also:
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TYPE_UNKNOWN
static final int TYPE_UNKNOWN- See Also:
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TYPE_NONE
static final int TYPE_NONE- See Also:
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TYPE_IPTR_CONSTANT
static final int TYPE_IPTR_CONSTANT- See Also:
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TYPE_IPTR_INTERNAL
static final int TYPE_IPTR_INTERNAL- See Also:
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TYPE_IPTR_SPACEBASE
static final int TYPE_IPTR_SPACEBASE- See Also:
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ID_SIZE_MASK
static final int ID_SIZE_MASK- See Also:
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ID_SIZE_SHIFT
static final int ID_SIZE_SHIFT- See Also:
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ID_TYPE_MASK
static final int ID_TYPE_MASK- See Also:
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ID_UNIQUE_SHIFT
static final int ID_UNIQUE_SHIFT- See Also:
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OTHER_SPACE
TheOTHER_SPACE
is used to store data from the original program file that doesn't get loaded into the final memory image and for user-defined spaces. -
EXTERNAL_SPACE
TheEXTERNAL_SPACE
is used to contain all external locations (i.e., data and functions) defined within a given library namespace. All external locations within a program are given a unique offset within the EXTERNAL space. -
VARIABLE_SPACE
TheVARIABLE_SPACE
is used to contain all variables and parameters defined within a given namespace (i.e., function). All variables within a program are given a unique offset within the VARIABLE space. -
HASH_SPACE
TheHASH_SPACE
provides a 60-bit space for encoding of unique hashcodes. -
DEFAULT_REGISTER_SPACE
A language may only define a single REGISTER space. If one is not defined, this DEFAULT_REGISTER_SPACE definition will be used.
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Method Details
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getName
String getName()Returns the name of this address space. With the exception ofOverlayAddressSpace
, the name of an address space may not change. -
getSpaceID
int getSpaceID()Get the ID for this space- Returns:
- space ID
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getSize
int getSize()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. -
getAddressableUnitSize
int getAddressableUnitSize()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 methodgetAddressableWordOffset(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)
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getAddressableWordOffset
long getAddressableWordOffset(long byteOffset) 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.- Parameters:
byteOffset
- memory byte offset- Returns:
- addressable memory word offset
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getPointerSize
int getPointerSize()Returns the absolute size of a pointer into this space (in bytes).- See Also:
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getType
int getType()Returns the type of this address space -
getUnique
int getUnique()Returns the unique index for this address space -
getAddress
Parses the String into an address within this address space.- 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.
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getAddress
Parses the String into an address within this address space.- 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.
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getAddress
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:
byteOffset
- the byte offset for the new address.- Returns:
- address with given byte offset
- Throws:
AddressOutOfBoundsException
- if the offset is less than 0 or greater than the max offset allowed for this space.
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getAddress
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.- 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. SeegetAddressableUnitSize()
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.
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getTruncatedAddress
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.- 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. SeegetAddressableUnitSize()
to understand the distinction (i.e., wordOffset = byteOffset * addressableUnitSize).- Returns:
- address with given byte offset truncated to the physical space size
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getAddressInThisSpaceOnly
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:
byteOffset
- the byte offset for the new address.- Returns:
- an address if the offset is valid.
- Throws:
AddressOutOfBoundsException
- if the offset is less than 0 or greater than the max offset allowed for this space.
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truncateOffset
long truncateOffset(long byteOffset) Truncate the specified byte offset within this space to produce a valid offset.- Parameters:
byteOffset
- any byte offset- Returns:
- truncated byte offset
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truncateAddressableWordOffset
long truncateAddressableWordOffset(long wordOffset) Truncate the specified addressable unit/word offset within this space to produce a valid offset.- Parameters:
wordOffset
- any addressable unit/word offset- Returns:
- truncated word offset
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getOverlayAddress
Get an address that is relative to this address space. If this is an overlay space and the address falls within this space, return an address based in this space.- Parameters:
addr
- address possibly falling within this overlay space.- Returns:
- an address relative to this overlay
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subtract
Calculates the displacement between addr1 and addr2 (addr1 - addr2)- Parameters:
addr1
- the address to subtract from.addr2
- the address to subtract.- Returns:
- the difference. (
addr1.offset - addr2.offset
). - Throws:
IllegalArgumentException
- if the two addresses are not in the same address space.
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subtractWrap
Creates a new address by subtracting displacement from addr's offset.- 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.
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subtractWrapSpace
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.- 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.
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subtractNoWrap
Creates a new address by subtracting displacement from addr's offset. The new offset will NOT wrap!- Parameters:
addr
- the original addressdisplacement
- the displacement to subtract.- Returns:
- The new address created by subtracting displacement from addr.offset.
- Throws:
AddressOverflowException
- if the subtraction would cause a wrap,
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subtract
Creates a new address (possibly in a new space) by subtracting the given displacement from the given address.- Parameters:
addr
- original address being subtracted fromdisplacement
- amount to subtract- Returns:
- the new address
- Throws:
AddressOutOfBoundsException
- if the result does not correspond to any address.
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addWrap
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.- Parameters:
addr
- the original address.displacement
- the displacement to add.- Returns:
- the new address created by adding displacement to addr.offset.
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addWrapSpace
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.- 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.
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addNoWrap
Creates a new address by adding displacement to the given address. The new address will NOT wrap!- 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,
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addNoWrap
Creates a new address by adding displacement to the given address. The new address will NOT wrap!- 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,
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add
Creates a new address (possibly in a new space) by adding the given displacement from the given address.- Parameters:
addr
- original address being subtracted fromdisplacement
- amount to subtract- Returns:
- the new address
- Throws:
AddressOutOfBoundsException
- if the result does not correspond to any address.
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isValidRange
boolean isValidRange(long byteOffset, long length) Check the specified address range for validity within this space. Segmented spaces will restrict a range to a single segment.- Parameters:
byteOffset
-length
-- Returns:
- true if range is valid for this space
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isSuccessor
Tests whether addr2 immediately follows addr1.- Parameters:
addr1
- the first address.addr2
- the second address.
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getMaxAddress
Address getMaxAddress()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 usingOverlayAddressSpace.getOverlayAddressSet()
.- Returns:
- maximum address of this address space.
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getMinAddress
Address getMinAddress()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 usingOverlayAddressSpace.getOverlayAddressSet()
.- Returns:
- minimum address of this address space.
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getPhysicalSpace
AddressSpace getPhysicalSpace()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).- Returns:
- the associated physical space.
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makeValidOffset
Tests if the offset if valid. If the space is signed, then it sign extends the offset.- 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
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isMemorySpace
boolean isMemorySpace()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.- See Also:
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isLoadedMemorySpace
boolean isLoadedMemorySpace()Returns true if this space represents represents a Loaded Memory region (e.g., processor RAM). -
isNonLoadedMemorySpace
boolean isNonLoadedMemorySpace()Returns true if this space represents represents a Non-Loaded storage region for retaining non-loaded file data (e.g., OTHER) -
isRegisterSpace
boolean isRegisterSpace()Returns true if this space represents a register location -
isVariableSpace
boolean isVariableSpace()Returns true if this space represents a variable location -
isStackSpace
boolean isStackSpace()Returns true if this space represents a stack location -
isHashSpace
boolean isHashSpace()Returns true if this space represents a location in the HASH space. -
isExternalSpace
boolean isExternalSpace()Returns true if this space in the EXTERNAL_SPACE -
isUniqueSpace
boolean isUniqueSpace()Returns true if this space in the unique space -
isConstantSpace
boolean isConstantSpace()Returns true if this space in the constant space -
hasMappedRegisters
boolean hasMappedRegisters()Returns true if this space has registers that are mapped into it. This means that registers could actually have pointers to them.- Returns:
- true if this space has any registers mapped in it.
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showSpaceName
boolean showSpaceName()Returns true if the address should display its addressSpace name. -
isOverlaySpace
boolean isOverlaySpace()Returns true if this addressSpace is an OverlayAddressSpace -
hasSignedOffset
boolean hasSignedOffset()Returns true if space uses signed offset -
isValidName
Determine if the specific name is a valid address space name (e.g., allowed overlay space name). NOTE: This does not perform any duplicate name checks.- Parameters:
name
- name- Returns:
- true if name is a valid space name.
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