ghidra::InsertExpression Class Reference

A write to a bitfield stored in an explicit Varnode. More...

#include <expression.hh>

Inheritance diagram for ghidra::InsertExpression:

Public Member Functions
	InsertExpression (const PcodeOp *insert)
	Construct from an INSERT.
Public Member Functions inherited from ghidra::BitFieldExpression
const Varnode *	recoverStructurePointer (const Varnode *vn, int4 offset)
	Recover the Varnode holding the pointer to the parent structure.
bool	isValid (void) const
	Is this a valid bitfield expression.

Static Public Member Functions
static uintb	getRangeMask (const PcodeOp *insert)
	Get a mask representing the INSERTed range of bits.
static uintb	getLSBMask (const PcodeOp *insert)
	Get mask of least significant bits matching INSERT size.
Static Public Member Functions inherited from ghidra::BitFieldExpression
static const TypeBitField *	getPullField (const PcodeOp *pull)
	Get field description corresponding to given ZPULL or SPULL.

Public Attributes
const PcodeOp *	insertOp
	INSERT op.
const Symbol *	symbol
	Structure symbol represented by the INSERT output.
Public Attributes inherited from ghidra::BitFieldExpression
TypeStruct *	theStruct
	Parent structure containing the bitfield.
const TypeBitField *	bitfield
	Formal bitfield description.
int4	byteRangeOffset
	Offset of byte range into encompassStruct.
int4	offsetToBitStruct
	Offset of structure containing bitfield in encompassStruct.

Additional Inherited Members
Protected Member Functions inherited from ghidra::BitFieldExpression
void	getStructures (Datatype *dt, int4 initByteOff, int4 leastBitOff, bool isBigEndian)
	Recover the structure(s) holding the bitfield.

Detailed Description

A write to a bitfield stored in an explicit Varnode.

The INSERT output is expected to be a associated with a (partial) symbol and hold data-type information.

Member Function Documentation

getLSBMask()

uintb ghidra::InsertExpression::getLSBMask ( const PcodeOp *  insert )

static

Get mask of least significant bits matching INSERT size.

Parameters

insert

is the CPUI_INSERT op

Returns

mask with of the least significant bits

References ghidra::PcodeOp::getIn(), and ghidra::Varnode::getOffset().

Referenced by ghidra::RuleInsertAbsorb::absorbAnd().

getRangeMask()

uintb ghidra::InsertExpression::getRangeMask ( const PcodeOp *  insert )

static

Get a mask representing the INSERTed range of bits.

Parameters

insert

is the CPUI_INSERT op

Returns

a mask with a 1 wherever bits are inserted by the op

References ghidra::PcodeOp::getIn(), and ghidra::Varnode::getOffset().

Referenced by ghidra::BitFieldTransform::findOverwrite(), ghidra::BitFieldInsertTransform::verifyLoadStoreOriginalValue(), and ghidra::BitFieldInsertTransform::verifyMappedOriginalValue().

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

• expression.hh
• expression.cc