TransformVar Class Reference

Placeholder node for Varnode that will exist after a transform is applied to a function. More...

#include <transform.hh>

Public Types
enum	{   piece = 1, preexisting = 2, normal_temp = 3, piece_temp = 4,   constant = 5, constant_iop = 6 }
	Types of replacement Varnodes. More...
enum	{ split_terminator = 1, input_duplicate = 2 }
	Flags for a TransformVar. More...

Public Member Functions
Varnode *	getOriginal (void) const
	Get the original Varnode this placeholder models.
TransformOp *	getDef (void) const
	Get the operator that defines this placeholder variable.

Private Member Functions
void	createReplacement (Funcdata *fd)
	Create the new/modified variable this placeholder represents. More...
void	initialize (uint4 tp, Varnode *v, int4 bits, int4 bytes, uintb value)
	Initialize this variable from raw data. More...

Private Attributes
Varnode *	vn
	Original big Varnode of which this is a component.
Varnode *	replacement
	The new explicit lane Varnode.
uint4	type
	Type of new Varnode.
uint4	flags
	Boolean properties of the placeholder.
int4	byteSize
	Size of the lane Varnode in bytes.
int4	bitSize
	Size of the logical value in bits.
uintb	val
	Value of constant or (bit) position within the original big Varnode.
TransformOp *	def
	Defining op for new Varnode.

Friends
class	TransformManager
class	TransformOp

Detailed Description

Placeholder node for Varnode that will exist after a transform is applied to a function.

Member Enumeration Documentation

anonymous enum

Types of replacement Varnodes.

Enumerator
piece	New Varnode is a piece of an original Varnode.
preexisting	Varnode preexisted in the original data-flow.
normal_temp	A new temporary (unique space) Varnode.
piece_temp	A temporary representing a piece of an original Varnode.
constant	A new constant Varnode.
constant_iop	Special iop constant encoding a PcodeOp reference.

anonymous enum

Flags for a TransformVar.

Enumerator
split_terminator	The last (most significant piece) of a split array.
input_duplicate	This is a piece of an input that has already been visited.

Member Function Documentation

void TransformVar::createReplacement ( Funcdata *  fd )

private

Create the new/modified variable this placeholder represents.

Create the Varnode object (constant, unique, vector piece) described by the given placeholder. If the Varnode is an output, assume the op already exists and create the Varnode as an output. Set the replacement field with the new Varnode.

Parameters

fd	is the function in which to create the replacement

References constant, constant_iop, Funcdata::getArch(), AddrSpaceManager::getIopSpace(), PcodeOp::getOpFromConst(), Funcdata::newConstant(), Funcdata::newUnique(), Funcdata::newUniqueOut(), Funcdata::newVarnode(), Funcdata::newVarnodeIop(), Funcdata::newVarnodeOut(), normal_temp, piece, piece_temp, preexisting, Address::renormalize(), and Funcdata::transferVarnodeProperties().

Referenced by TransformManager::createVarnodes().

void TransformVar::initialize ( uint4  tp, Varnode *  v, int4  bits, int4  bytes, uintb  value  )

inlineprivate

Initialize this variable from raw data.

Parameters

tp	is the type of variable to create
v	is the underlying Varnode of which this is a piece (may be null)
bits	is the number of bits in the variable
bytes	is the number of bytes in the variable
value	is the associated value

References bitSize, byteSize, def, flags, replacement, type, val, and vn.

Referenced by TransformManager::newConstant(), TransformManager::newIop(), TransformManager::newPiece(), TransformManager::newPreexistingVarnode(), TransformManager::newSplit(), and TransformManager::newUnique().

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

• transform.hh
• transform.cc