Control the cloning of PcodeOps from within a basic block into another block. More...

#include <funcdata.hh>

Collaboration diagram for ghidra::CloneBlockOps:

Classes
struct	ClonePair
	Helper class for pairing a p-code op with its clone. More...

Public Member Functions
	CloneBlockOps (Funcdata &fd)
	Constructor.

void	cloneBlock (BlockBasic b, BlockBasic bprime, int4 inedge)
	Clone all p-code ops from a block into its copy.

Varnode *	cloneExpression (vector< PcodeOp * > &ops, PcodeOp *followOp)
	Clone p-code ops in an expression.

Private Member Functions
PcodeOp *	buildOpClone (PcodeOp *op)
	Produce a skeleton copy of the given PcodeOp.

void	buildVarnodeOutput (PcodeOp origOp, PcodeOp cloneOp)
	Clone the output Varnode of the given op onto its clone.

void	patchInputs (int4 inedge)
	Set the input Varnodes of all cloned ops.

Private Attributes
Funcdata &	data

vector< ClonePair >	cloneList
	List of cloned ops.

map< PcodeOp , PcodeOp >	origToClone
	Map from original p-code op to its clone.

Detailed Description

Control the cloning of PcodeOps from within a basic block into another block.

Used for splitting control-flow at a merge point. Can duplicate either a whole basic block, or an expression subset within a basic block.

Member Function Documentation

◆ buildOpClone()

PcodeOp * ghidra::CloneBlockOps::buildOpClone ( PcodeOp * op )

private

Produce a skeleton copy of the given PcodeOp.

Make a basic clone of the p-code op copying its basic control-flow properties. In the case of a branch, the p-code op is not cloned and null is returned.

Parameters

op	is the given PcodeOp

Returns: the cloned op or null

References ghidra::PcodeOp::addlflags, ghidra::PcodeOp::badinstruction, ghidra::PcodeOp::calculated_bool, cloneList, ghidra::PcodeOp::code(), ghidra::CPUI_BRANCH, ghidra::PcodeOp::flags, ghidra::PcodeOp::getAddr(), ghidra::PcodeOp::halt, ghidra::PcodeOp::incidental_copy, ghidra::PcodeOp::indirect_creation, ghidra::PcodeOp::indirect_store, ghidra::PcodeOp::is_cpool_transformed, ghidra::PcodeOp::isBranch(), ghidra::PcodeOp::missing, ghidra::Funcdata::newOp(), ghidra::PcodeOp::no_indirect_collapse, ghidra::PcodeOp::nocollapse, ghidra::PcodeOp::nonprinting, ghidra::PcodeOp::noreturn, ghidra::PcodeOp::numInput(), ghidra::Funcdata::opSetOpcode(), origToClone, ghidra::PcodeOp::ptrflow, ghidra::PcodeOp::setAdditionalFlag(), ghidra::PcodeOp::setFlag(), ghidra::PcodeOp::special_print, ghidra::PcodeOp::special_prop, ghidra::PcodeOp::startbasic, ghidra::PcodeOp::startmark, ghidra::PcodeOp::stop_type_propagation, ghidra::PcodeOp::store_unmapped, and ghidra::PcodeOp::unimplemented.

Referenced by cloneBlock(), and cloneExpression().

◆ buildVarnodeOutput()

void ghidra::CloneBlockOps::buildVarnodeOutput	(	PcodeOp *	origOp,
		PcodeOp *	cloneOp
	)

private

Clone the output Varnode of the given op onto its clone.

Make a basic clone of the Varnode and its flags. The clone is created as an output of a previously cloned PcodeOp.

Parameters

op	is the given op whose output should be cloned
newop	is the cloned version

References ghidra::Varnode::addlflags, ghidra::Varnode::addrforce, ghidra::Varnode::addrtied, ghidra::Varnode::externref, ghidra::Varnode::getAddr(), ghidra::Varnode::getFlags(), ghidra::PcodeOp::getOut(), ghidra::Varnode::getSize(), ghidra::Varnode::incidental_copy, ghidra::Varnode::indirect_creation, ghidra::Funcdata::newVarnodeOut(), ghidra::Varnode::nolocalalias, ghidra::Varnode::persist, ghidra::Varnode::precishi, ghidra::Varnode::precislo, ghidra::Varnode::ptrflow, ghidra::Varnode::readonly, ghidra::Varnode::return_address, ghidra::Varnode::setFlags(), ghidra::Varnode::spacebase, ghidra::Varnode::stack_store, ghidra::Varnode::volatil, and ghidra::Varnode::writemask.

Referenced by cloneBlock(), and cloneExpression().

◆ cloneBlock()

void ghidra::CloneBlockOps::cloneBlock	(	BlockBasic *	b,
		BlockBasic *	bprime,
		int4	inedge
	)

Clone all p-code ops from a block into its copy.

P-code in a basic block is cloned into the split version of the block.

Parameters

b	is the original basic block
bprime	is the cloned block
inedge	is the incoming edge index that was split on

References ghidra::BlockBasic::beginOp(), buildOpClone(), buildVarnodeOutput(), ghidra::BlockBasic::endOp(), ghidra::Funcdata::opInsertEnd(), and patchInputs().

Referenced by ghidra::Funcdata::nodeSplit().

◆ cloneExpression()

Varnode * ghidra::CloneBlockOps::cloneExpression	(	vector< PcodeOp * > &	ops,
		PcodeOp *	followOp
	)

Clone p-code ops in an expression.

P-code in the list is cloned right before the given followOp.

Parameters

ops	is the list of ops to clone
followOp	is the point where the cloned ops are inserted

Returns: the output Varnode of the last cloned op

References buildOpClone(), buildVarnodeOutput(), cloneList, ghidra::PcodeOp::getOut(), ghidra::Funcdata::opInsertBefore(), and patchInputs().

Referenced by ghidra::RuleConditionalMove::constructBool().

◆ patchInputs()

void ghidra::CloneBlockOps::patchInputs ( int4 inedge )

private

Set the input Varnodes of all cloned ops.

Map Varnodes that are inputs for PcodeOps in the original basic block to the input slots of the cloned ops. Constants and code ref Varnodes need to be duplicated, other Varnodes are shared between the ops. This routine also pulls an input Varnode out of original MULTIEQUAL ops and adds it back to the cloned MULTIEQUAL ops.

Parameters

inedge is the incoming edge index that was split on

References cloneList, ghidra::PcodeOp::code(), ghidra::CPUI_COPY, ghidra::CPUI_INDIRECT, ghidra::CPUI_MULTIEQUAL, ghidra::Varnode::getAddr(), ghidra::Varnode::getDef(), ghidra::PcodeOp::getIn(), ghidra::Varnode::isAnnotation(), ghidra::PcodeOp::isCall(), ghidra::Varnode::isConstant(), ghidra::Varnode::isFree(), ghidra::Varnode::isWritten(), ghidra::Funcdata::newCodeRef(), ghidra::PcodeOp::numInput(), ghidra::Funcdata::opRemoveInput(), ghidra::Funcdata::opSetInput(), ghidra::Funcdata::opSetOpcode(), origToClone, and ghidra::PcodeOp::setNumInputs().

Referenced by cloneBlock(), and cloneExpression().

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

/builds/appsec/reveng-binrw/ghidraplusplus/src/dec/funcdata.hh
/builds/appsec/reveng-binrw/ghidraplusplus/src/dec/funcdata_block.cc

Classes

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Member Function Documentation

◆ buildOpClone()

◆ buildVarnodeOutput()

◆ cloneBlock()

◆ cloneExpression()

◆ patchInputs()