Create symbols that map out the local stack-frame for the function. More...

#include <coreaction.hh>

Inheritance diagram for ghidra::ActionRestructureVarnode:

Public Member Functions
	ActionRestructureVarnode (const string &g)
	Constructor.

virtual void	reset (Funcdata &data)
	Reset the Action for a new function. More...

virtual Action *	clone (const ActionGroupList &grouplist) const
	Clone the Action. More...

virtual int4	apply (Funcdata &data)
	Make a single attempt to apply this Action. More...

Public Member Functions inherited from ghidra::Action
	Action (uint4 f, const string &nm, const string &g)
	Base constructor for an Action. More...

virtual	~Action (void)
	Destructor.

virtual void	printStatistics (ostream &s) const
	Dump statistics to stream. More...

int4	perform (Funcdata &data)
	Perform this action (if necessary) More...

bool	setBreakPoint (uint4 tp, const string &specify)
	Set a breakpoint on this action. More...

virtual void	clearBreakPoints (void)
	Clear all breakpoints set on this Action.

bool	setWarning (bool val, const string &specify)
	Set a warning on this action. More...

bool	disableRule (const string &specify)
	Disable a specific Rule within this. More...

bool	enableRule (const string &specify)
	Enable a specific Rule within this. More...

const string &	getName (void) const
	Get the Action's name.

const string &	getGroup (void) const
	Get the Action's group.

uint4	getStatus (void) const
	Get the current status of this Action.

uint4	getNumTests (void)
	Get the number of times apply() was invoked.

uint4	getNumApply (void)

virtual void	resetStats (void)
	Reset all the counts to zero. More...

virtual int4	print (ostream &s, int4 num, int4 depth) const
	Print a description of this Action to stream. More...

virtual void	printState (ostream &s) const
	Print status to stream. More...

virtual Action *	getSubAction (const string &specify)
	Retrieve a specific sub-action by name. More...

virtual Rule *	getSubRule (const string &specify)
	Retrieve a specific sub-rule by name. More...

Static Private Member Functions
static void	protectSwitchPathIndirects (PcodeOp *op)
	Protect path to the given switch from INDIRECT collapse. More...

static void	protectSwitchPaths (Funcdata &data)
	Look for switches and protect path of switch variable. More...

Private Attributes
int4	numpass
	Number of passes performed for this function.

Additional Inherited Members
Public Types inherited from ghidra::Action
enum	ruleflags { rule_repeatapply = 4, rule_onceperfunc = 8, rule_oneactperfunc = 16, rule_debug = 32, rule_warnings_on = 64, rule_warnings_given = 128 }
	Boolean behavior properties governing this particular Action. More...

enum	statusflags { status_start =1, status_breakstarthit =2, status_repeat =4, status_mid =8, status_end =16, status_actionbreak =32 }
	Boolean properties describing the status of an action. More...

enum	breakflags { break_start = 1, tmpbreak_start = 2, break_action = 4, tmpbreak_action = 8 }
	Break points associated with an Action. More...

Protected Member Functions inherited from ghidra::Action
void	issueWarning (Architecture *glb)
	Warn that this Action has applied. More...

bool	checkStartBreak (void)
	Check start breakpoint. More...

bool	checkActionBreak (void)
	Check action breakpoint. More...

void	turnOnWarnings (void)
	Enable warnings for this Action.

void	turnOffWarnings (void)
	Disable warnings for this Action.

Protected Attributes inherited from ghidra::Action
int4	lcount
	Changes not including last call to apply()

int4	count
	Number of changes made by this action so far.

uint4	status
	Current status.

uint4	breakpoint
	Breakpoint properties.

uint4	flags
	Behavior properties.

uint4	count_tests
	Number of times apply() has been called.

uint4	count_apply
	Number of times apply() made changes.

string	name
	Name of the action.

string	basegroup
	Base group this action belongs to.

Detailed Description

Create symbols that map out the local stack-frame for the function.

This produces on intermediate view of symbols on the stack.

Member Function Documentation

◆ apply()

int4 ghidra::ActionRestructureVarnode::apply ( Funcdata & data )

virtual

Make a single attempt to apply this Action.

This is the main entry point for applying changes to a function that are specific to this Action. The method can inspect whatever it wants to decide if the Action does or does not apply. Changes are indicated by incrementing the count field.

Parameters

data	is the function to inspect/modify

Returns: 0 for a complete application, -1 for a partial completion (due to breakpoint)

Implements ghidra::Action.

References ghidra::Funcdata::getArch(), ghidra::Funcdata::getScopeLocal(), ghidra::Funcdata::isJumptableRecoveryOn(), ghidra::ScopeInternal::printEntries(), ghidra::ScopeLocal::restructureVarnode(), and ghidra::Funcdata::syncVarnodesWithSymbols().

◆ clone()

virtual Action* ghidra::ActionRestructureVarnode::clone ( const ActionGroupList & grouplist ) const

inlinevirtual

Clone the Action.

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

Parameters

grouplist is the list of groups being cloned

Returns: the cloned Action or NULL

Implements ghidra::Action.

References ghidra::ActionStart::apply(), ghidra::ActionGroupList::contains(), and ghidra::Action::getGroup().

◆ protectSwitchPathIndirects()

void ghidra::ActionRestructureVarnode::protectSwitchPathIndirects ( PcodeOp * op )

staticprivate

Protect path to the given switch from INDIRECT collapse.

Test if the path to the given BRANCHIND originates from a constant but passes through INDIRECT operations. This indicates that the switch value is produced indirectly, so we mark these INDIRECT operations as not collapsible, to guarantee that the indirect value is not lost during analysis.

Parameters

op	is the given BRANCHIND op

References ghidra::PcodeOp::binary, ghidra::PcodeOp::code(), ghidra::CPUI_INDIRECT, ghidra::CPUI_LOAD, ghidra::Varnode::getDef(), ghidra::PcodeOp::getEvalType(), ghidra::PcodeOp::getIn(), ghidra::Varnode::isConstant(), ghidra::Varnode::isWritten(), ghidra::PcodeOp::numInput(), ghidra::PcodeOp::ternary, and ghidra::PcodeOp::unary.

◆ protectSwitchPaths()

void ghidra::ActionRestructureVarnode::protectSwitchPaths ( Funcdata & data )

staticprivate

Look for switches and protect path of switch variable.

Run through BRANCHIND ops, treat them as switches and protect the data-flow path to the destination variable

Parameters

data	is the function to examine

References ghidra::PcodeOp::code(), ghidra::CPUI_BRANCHIND, and ghidra::Funcdata::getBasicBlocks().

◆ reset()

virtual void ghidra::ActionRestructureVarnode::reset ( Funcdata & data )

inlinevirtual

Reset the Action for a new function.

Parameters

data	is the new function this Action may affect

Reimplemented from ghidra::Action.

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

coreaction.hh
coreaction.cc

Public Member Functions

Static Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ apply()

◆ clone()

◆ protectSwitchPathIndirects()

◆ protectSwitchPaths()

◆ reset()