Pull SUBPIECE back through MULTIEQUAL. More...

Inheritance 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

Referenced by applyOp(), and RulePullsubIndirect::applyOp().

◆ 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.

References acceptableSize(), buildSubpiece(), calc_mask(), CPUI_INT_SEXT, CPUI_INT_ZEXT, CPUI_MULTIEQUAL, findSubpiece(), minMaxUse(), Funcdata::newOp(), Funcdata::newVarnodeOut(), Funcdata::opInsertBegin(), Funcdata::opSetAllInput(), Funcdata::opSetOpcode(), Address::renormalize(), and replaceDescendants().

◆ 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

References CPUI_SUBPIECE, VarnodeData::getAddr(), AddrSpace::isBigEndian(), Funcdata::newConstant(), Funcdata::newOp(), Funcdata::newUniqueOut(), Funcdata::newVarnodeOut(), Funcdata::opInsertAfter(), Funcdata::opInsertBegin(), Funcdata::opSetInput(), Funcdata::opSetOpcode(), Address::renormalize(), VarnodeData::size, and VarnodeData::space.

Referenced by applyOp(), and RulePullsubIndirect::applyOp().

◆ 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.

References ActionGroupList::contains().

◆ 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

References CPUI_SUBPIECE.

Referenced by applyOp(), and RulePullsubIndirect::applyOp().

◆ 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.

References CPUI_SUBPIECE.

◆ 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

References CPUI_SUBPIECE.

Referenced by applyOp(), and RulePullsubIndirect::applyOp().

◆ 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

References CPUI_COPY, CPUI_SUBPIECE, Funcdata::newConstant(), Funcdata::opRemoveInput(), Funcdata::opSetInput(), and Funcdata::opSetOpcode().

Referenced by applyOp(), and RulePullsubIndirect::applyOp().

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

ruleaction.hh
ruleaction.cc

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ acceptableSize()

◆ applyOp()

◆ buildSubpiece()

◆ clone()

◆ findSubpiece()

◆ getOpList()

◆ minMaxUse()

◆ replaceDescendants()