RulePullsubMulti Class Reference

Pull SUBPIECE back through MULTIEQUAL. More...

Inheritance diagram for RulePullsubMulti:

Collaboration diagram for RulePullsubMulti:

Public Member Functions
virtual Rule *	clone (const ActionGroupList &grouplist) const
	Clone the Rule. More...
virtual void	getOpList (vector< uint4 > &oplist) const
	List of op codes this rule operates on. More...
virtual int4	applyOp (PcodeOp *op, Funcdata &data)
	Attempt to apply this Rule. More...
Public Member Functions inherited from Rule
	Rule (const string &g, uint4 fl, const string &nm)
	Construct given group, properties name. More...
bool	checkActionBreak (void)
	Check if an action breakpoint is turned on. More...
virtual void	reset (Funcdata &data)
	Reset this Rule. More...
virtual void	resetStats (void)
	Reset Rule statistics. More...
virtual void	printStatistics (ostream &s) const
	Print statistics for this Rule. More...

Static Public Member Functions
static void	minMaxUse (Varnode *vn, int4 &maxByte, int4 &minByte)
	Compute minimum and maximum bytes being used. More...
static void	replaceDescendants (Varnode *origVn, Varnode *newVn, int4 maxByte, int4 minByte, Funcdata &data)
static bool	acceptableSize (int4 size)
	Return true if given size is a suitable truncated size. More...
static Varnode *	buildSubpiece (Varnode *basevn, uint4 outsize, uint4 shift, Funcdata &data)
	Build a SUBPIECE of given base Varnode. More...
static Varnode *	findSubpiece (Varnode *basevn, uint4 outsize, uint4 shift)
	Find a predefined SUBPIECE of a base Varnode. More...

Additional Inherited Members
Public Types inherited from Rule
enum	typeflags { type_disable = 1, rule_debug = 2, warnings_on = 4, warnings_given = 8 }
	Properties associated with a Rule. More...

Detailed Description

Pull SUBPIECE back through MULTIEQUAL.

Member Function Documentation

acceptableSize()

bool RulePullsubMulti::acceptableSize ( int4  size )

static

Return true if given size is a suitable truncated size.

Parameters

size	is the given size

Returns

true if it is acceptable

applyOp()

int4 RulePullsubMulti::applyOp ( PcodeOp *  op, Funcdata &  data  )

virtual

Attempt to apply this Rule.

This method contains the main logic for applying the Rule. It must use a given PcodeOp as the point at which the Rule applies. If it does apply, changes are made directly to the function and 1 (non-zero) is returned, otherwise 0 is returned.

Parameters

op	is the given PcodeOp where the Rule may apply
data	is the function to which to apply

Reimplemented from Rule.

buildSubpiece()

Varnode * RulePullsubMulti::buildSubpiece ( Varnode *  basevn, uint4  outsize, uint4  shift, Funcdata &  data  )

static

Build a SUBPIECE of given base Varnode.

The PcodeOp is constructed and inserted near the definition of the base Varnode.

Parameters

basevn	is the given base Varnode
outsize	is the required truncated size in bytes
shift	is the number of least significant bytes to truncate
data	is the function being analyzed

Returns

the output Varnode of the new SUBPIECE

clone()

virtual Rule* RulePullsubMulti::clone ( const ActionGroupList &  grouplist ) const

inlinevirtual

Clone the Rule.

If this Rule is a member of one of the groups in the grouplist, this returns a clone of the Rule, otherwise NULL is returned.

Parameters

grouplist

is the list of groups being cloned

Returns

the cloned Rule or NULL

Implements Rule.

findSubpiece()

Varnode * RulePullsubMulti::findSubpiece ( Varnode *  basevn, uint4  outsize, uint4  shift  )

static

Find a predefined SUBPIECE of a base Varnode.

Given a Varnode and desired dimensions (size and shift), search for a preexisting truncation defined in the same block as the original Varnode or return NULL

Parameters

basevn	is the base Varnode
outsize	is the desired truncation size
shift	if the desired truncation shift

Returns

the truncated Varnode or NULL

getOpList()

void RulePullsubMulti::getOpList ( vector< uint4 > &  oplist ) const

virtual

List of op codes this rule operates on.

Populate the given array with all possible OpCodes this Rule might apply to. By default, this method returns all possible OpCodes

Parameters

oplist

is the array to populate

Reimplemented from Rule.

minMaxUse()

void RulePullsubMulti::minMaxUse ( Varnode *  vn, int4 &  maxByte, int4 &  minByte  )

static

Compute minimum and maximum bytes being used.

For bytes in given Varnode pass back the largest and smallest index (lsb=0) consumed by an immediate descendant.

Parameters

vn	is the given Varnode
maxByte	will hold the index of the maximum byte
minByte	will hold the index of the minimum byte

replaceDescendants()

void RulePullsubMulti::replaceDescendants ( Varnode *  origVn, Varnode *  newVn, int4  maxByte, int4  minByte, Funcdata &  data  )

static

Replace given Varnode with (smaller) newVn in all descendants

If minMaxUse() indicates not all bytes are used, this should always succeed

Parameters

origVn	is the given Varnode
newVn	is the new Varnode to replace with
maxByte	is the maximum byte immediately used in origVn
minByte	is the minimum byte immediately used in origVn
data	is the function being analyzed

---

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

• ruleaction.hh
• ruleaction.cc