Space for storing internal PcodeOp pointers as addresses. More...

#include <op.hh>

Inheritance diagram for IopSpace:

Public Member Functions
	IopSpace (AddrSpaceManager m, const Translate t, const string &nm, int4 ind)

virtual void	saveXmlAttributes (ostream &s, uintb offset) const
	Save an address as XML. More...

virtual void	saveXmlAttributes (ostream &s, uintb offset, int4 size) const
	Save an address and size as XML. More...

virtual void	printRaw (ostream &s, uintb offset) const
	Write an address in this space to a stream. More...

virtual void	saveXml (ostream &s) const
	Write the details of this space as XML. More...

virtual void	restoreXml (const Element *el)
	Recover the details of this space from XML. More...

Public Member Functions inherited from AddrSpace
	AddrSpace (AddrSpaceManager m, const Translate t, spacetype tp, const string &nm, uint4 size, uint4 ws, int4 ind, uint4 fl, int4 dl)

	AddrSpace (AddrSpaceManager m, const Translate t, spacetype tp)
	For use with restoreXml. More...

virtual	~AddrSpace (void)
	The address space destructor.

const string &	getName (void) const
	Get the name. More...

AddrSpaceManager *	getManager (void) const
	Get the space manager. More...

const Translate *	getTrans (void) const
	Get the processor translator. More...

spacetype	getType (void) const
	Get the type of space. More...

int4	getDelay (void) const
	Get number of heritage passes being delayed. More...

int4	getDeadcodeDelay (void) const
	Get number of passes before deadcode removal is allowed. More...

int4	getIndex (void) const
	Get the integer identifier. More...

uint4	getWordSize (void) const
	Get the addressable unit size. More...

uint4	getAddrSize (void) const
	Get the size of the space. More...

uintb	getHighest (void) const
	Get the highest byte-scaled address. More...

uintb	getPointerLowerBound (void) const
	Get lower bound for assuming an offset is a pointer. More...

uintb	getPointerUpperBound (void) const
	Get upper bound for assuming an offset is a pointer. More...

int4	getMinimumPtrSize (void) const
	Get the minimum pointer size for this space. More...

uintb	wrapOffset (uintb off) const
	Wrap -off- to the offset that fits into this space. More...

char	getShortcut (void) const
	Get the shortcut character. More...

bool	isHeritaged (void) const
	Return true if dataflow has been traced. More...

bool	doesDeadcode (void) const
	Return true if dead code analysis should be done on this space. More...

bool	hasPhysical (void) const
	Return true if data is physically stored in this. More...

bool	isBigEndian (void) const
	Return true if values in this space are big endian. More...

bool	isReverseJustified (void) const
	Return true if alignment justification does not match endianness. More...

bool	isOverlay (void) const
	Return true if this is an overlay space.

bool	isOverlayBase (void) const
	Return true if other spaces overlay this space.

bool	isOtherSpace (void) const
	Return true if this is the other address space.

bool	isTruncated (void) const
	Return true if this space is truncated from its original size. More...

bool	hasNearPointers (void) const
	Return true if near (truncated) pointers into this space are possible.

void	printOffset (ostream &s, uintb offset) const
	Write an address offset to a stream. More...

virtual int4	numSpacebase (void) const
	Number of base registers associated with this space. More...

virtual const VarnodeData &	getSpacebase (int4 i) const
	Get a base register that creates this virtual space. More...

virtual const VarnodeData &	getSpacebaseFull (int4 i) const
	Return original spacebase register before truncation. More...

virtual bool	stackGrowsNegative (void) const
	Return true if a stack in this space grows negative. More...

virtual AddrSpace *	getContain (void) const
	Return this space's containing space (if any) More...

virtual uintb	restoreXmlAttributes (const Element *el, uint4 &size) const
	Recover an offset and size. More...

virtual uintb	read (const string &s, int4 &size) const
	Read in an address (and possible size) from a string. More...

Additional Inherited Members
Public Types inherited from AddrSpace
enum	{ big_endian = 1, heritaged = 2, does_deadcode = 4, programspecific = 8, reverse_justification = 16, overlay = 32, overlaybase = 64, truncated = 128, hasphysical = 256, is_otherspace = 512, has_nearpointers = 0x400 }

enum	{ constant_space_index = 0, other_space_index = 1 }

Static Public Member Functions inherited from AddrSpace
static uintb	addressToByte (uintb val, uint4 ws)
	Scale from addressable units to byte units. More...

static uintb	byteToAddress (uintb val, uint4 ws)
	Scale from byte units to addressable units. More...

static int4	addressToByteInt (int4 val, uint4 ws)
	Scale int4 from addressable units to byte units. More...

static int4	byteToAddressInt (int4 val, uint4 ws)
	Scale int4 from byte units to addressable units. More...

static bool	compareByIndex (const AddrSpace a, const AddrSpace b)
	Compare two spaces by their index. More...

Protected Member Functions inherited from AddrSpace
void	calcScaleMask (void)
	Calculate scale and mask. More...

void	setFlags (uint4 fl)
	Set a cached attribute. More...

void	clearFlags (uint4 fl)
	Clear a cached attribute. More...

void	saveBasicAttributes (ostream &s) const
	Write the XML attributes of this space. More...

void	truncateSpace (uint4 newsize)

Protected Attributes inherited from AddrSpace
string	name
	Name of this space.

uint4	addressSize
	Size of an address into this space in bytes.

uint4	wordsize
	Size of unit being addressed (1=byte)

int4	minimumPointerSize
	Smallest size of a pointer into this space (in bytes)

int4	index
	An integer identifier for the space.

int4	delay
	Delay in heritaging this space.

int4	deadcodedelay
	Delay before deadcode removal is allowed on this space.

Detailed Description

Space for storing internal PcodeOp pointers as addresses.

It is convenient and efficient to replace the formally encoded branch target addresses with a pointer to the actual PcodeOp being branched to. This special iop space allows a PcodeOp pointer to be encoded as an address so it can be stored as part of an input varnode, in place of the target address, in a branching operation. The pointer is encoded as an offset within the fspec space.

Constructor & Destructor Documentation

IopSpace::IopSpace	(	AddrSpaceManager *	m,
		const Translate *	t,
		const string &	nm,
		int4	ind
	)

Constructor for the iop space. There is only one such space, and it is considered internal to the model, i.e. the Translate engine should never generate addresses in this space.

Parameters

m	is the associated address space manager
t	is the associated processor translator
nm	is the name of the space (always iop)
ind	is the associated index

References AddrSpace::big_endian, AddrSpace::clearFlags(), AddrSpace::does_deadcode, AddrSpace::heritaged, and AddrSpace::setFlags().

Member Function Documentation

void IopSpace::printRaw	(	ostream &	s,
		uintb	offset
	)		const

virtual

Write an address in this space to a stream.

This is a printing method for the debugging routines. It prints taking into account the wordsize, adding a "+n" if the offset is not on-cut with wordsize. It also returns the expected/typical size of values from this space.

Parameters

s	is the stream being written
offset	is the offset to be printed

Reimplemented from AddrSpace.

References FlowBlock::getOut(), PcodeOp::getParent(), PcodeOp::getSeqNum(), Address::getShortcut(), BlockBasic::getStart(), PcodeOp::isBranch(), PcodeOp::isFallthruTrue(), Address::printRaw(), and FlowBlock::sizeOut().

Referenced by saveXmlAttributes().

void IopSpace::restoreXml ( const Element * el )

virtual

Recover the details of this space from XML.

Walk a parsed XML tag and recover all the properties defining this space. The processor translator, trans, and the type must already be filled in.

Parameters

el	is the parsed XML tag

Reimplemented from AddrSpace.

Referenced by saveXmlAttributes().

void IopSpace::saveXml ( ostream & s ) const

virtual

Write the details of this space as XML.

Write a tag fully describing the details of this space suitable for later recovery via restoreXml.

Parameters

s	is the stream being written

Reimplemented from AddrSpace.

Referenced by PcodeOp::getOpName(), and saveXmlAttributes().

virtual void IopSpace::saveXmlAttributes	(	ostream &	s,
		uintb	offset
	)		const

inlinevirtual

Save an address as XML.

Write the main XML attributes for an address within this space The caller provides only the offset, and this routine fills in other details pertaining to this particular space.

Parameters

s	is the stream to write to
offset	is the offset of the address

Reimplemented from AddrSpace.

virtual void IopSpace::saveXmlAttributes	(	ostream &	s,
		uintb	offset,
		int4	size
	)		const

inlinevirtual

Save an address and size as XML.

Write the main XML attributes of an address with this space and a size. The caller provides the offset and size, and other details about this particular space are filled in.

Parameters

s	is the stream to write to
offset	is the offset of the address
size	is the size of the memory location

Reimplemented from AddrSpace.

References printRaw(), restoreXml(), and saveXml().

The documentation for this class was generated from the following files:

op.hh
op.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation