An active container for a set of p-code operations that can be injected into data-flow. More...

#include <pcodeinject.hh>

Inheritance diagram for InjectPayload:

Public Types
enum	{ CALLFIXUP_TYPE = 1, CALLOTHERFIXUP_TYPE = 2, CALLMECHANISM_TYPE = 3, EXECUTABLEPCODE_TYPE = 4 }

Public Member Functions
	InjectPayload (const string &nm, int4 tp)
	Construct for use with restoreXml.

int4	getParamShift (void) const
	Get the number of parameters shifted.

bool	isDynamic (void) const
	Return true if p-code in the injection is generated dynamically.

int4	sizeInput (void) const
	Return the number of input parameters.

int4	sizeOutput (void) const
	Return the number of output parameters.

InjectParameter &	getInput (int4 i)
	Get the i-th input parameter.

InjectParameter &	getOutput (int4 i)
	Get the i-th output parameter.

virtual	~InjectPayload (void)
	Destructor.

virtual void	inject (InjectContext &context, PcodeEmit &emit) const =0

virtual void	restoreXml (const Element *el)
	Restore this payload from an XML stream. More...

virtual void	printTemplate (ostream &s) const =0
	Print the p-code ops of the injection to a stream (for debugging)

string	getName (void) const
	Return the name of the injection.

int4	getType (void) const
	Return the type of injection (CALLFIXUP_TYPE, CALLOTHERFIXUP_TYPE, etc.)

virtual string	getSource (void) const =0
	Return a string describing the source of the injection (.cspec, prototype model, etc.)

Protected Member Functions
void	orderParameters (void)
	Assign an index to parameters. More...

Static Protected Member Functions
static void	readParameter (const Element *el, string &name, uint4 &size)
	Read in an <input> or <output> XML tag describing an injection parameter. More...

Protected Attributes
string	name
	Formal name of the payload.

int4	type
	Type of this payload: CALLFIXUP_TYPE, CALLOTHERFIXUP_TYPE, etc.

bool	dynamic
	True if the injection is generated dynamically.

int4	paramshift
	Number of parameters shifted in the original call.

vector< InjectParameter >	inputlist
	List of input parameters to this payload.

vector< InjectParameter >	output
	List of output parameters.

Detailed Description

An active container for a set of p-code operations that can be injected into data-flow.

This is an abstract base class. Derived classes manage details of how the p-code is stored. The methods provide access to the input/output parameter information, and the main injection is performed with inject().

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enumerator
CALLFIXUP_TYPE	Injection that replaces a CALL.
CALLOTHERFIXUP_TYPE	Injection that replaces a user-defined p-code op, CALLOTHER.
CALLMECHANISM_TYPE	Injection to patch up data-flow around the caller/callee boundary.
EXECUTABLEPCODE_TYPE	Injection running as a stand-alone p-code script.

Member Function Documentation

◆ inject()

virtual void InjectPayload::inject	(	InjectContext &	context,
		PcodeEmit &	emit
	)		const

pure virtual

Perform the injection of this payload into data-flow.

P-code operations representing this payload are copied into the controlling analysis context. The provided PcodeEmit object dictates exactly where the PcodeOp and Varnode objects are inserted and to what container. An InjectContext object specifies how placeholder elements become concrete Varnodes in the appropriate context.

Parameters

context	is the provided InjectConject object
emit	is the provovided PcodeEmit object

Implemented in ExecutablePcodeGhidra, and InjectPayloadGhidra.

Referenced by ExecutablePcode::build(), FlowInfo::doInjection(), and Funcdata::doLiveInject().

◆ orderParameters()

void InjectPayload::orderParameters ( void )

protected

Assign an index to parameters.

Input and output parameters are assigned a unique index.

References inputlist, and output.

Referenced by restoreXml().

◆ readParameter()

void InjectPayload::readParameter	(	const Element *	el,
		string &	name,
		uint4 &	size
	)

staticprotected

Read in an <input> or <output> XML tag describing an injection parameter.

Parameters

el	is the XML element
name	is used to pass back the parameter name
size	is used to pass back the parameter size

References name.

Referenced by restoreXml().

◆ restoreXml()

void InjectPayload::restoreXml ( const Element * el )

virtual

Restore this payload from an XML stream.

The base class version of this method restores from a <pcode> tag. Derived classes may restore from a parent tag and then invoke the base class method.

Parameters