decompiler  1.0.0
Public Member Functions | Static Public Member Functions | List of all members
ghidra::RuleDivTermAdd Class Reference

Simplify expressions associated with optimized division expressions. More...

Inheritance diagram for ghidra::RuleDivTermAdd:
ghidra::Rule

Public Member Functions

 RuleDivTermAdd (const string &g)
 Constructor.
 
virtual Ruleclone (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 ghidra::Rule
 Rule (const string &g, uint4 fl, const string &nm)
 Construct given group, properties name. More...
 
virtual ~Rule (void)
 Destructor.
 
const string & getName (void) const
 Return the name of this Rule.
 
const string & getGroup (void) const
 Return the group this Rule belongs to.
 
uint4 getNumTests (void)
 Get number of attempted applications.
 
uint4 getNumApply (void)
 Get number of successful applications.
 
void setBreak (uint4 tp)
 Set a breakpoint on this Rule.
 
void clearBreak (uint4 tp)
 Clear a breakpoint on this Rule.
 
void clearBreakPoints (void)
 Clear all breakpoints on this Rule.
 
void turnOnWarnings (void)
 Enable warnings for this Rule.
 
void turnOffWarnings (void)
 Disable warnings for this Rule.
 
bool isDisabled (void) const
 Return true if this Rule is disabled.
 
void setDisable (void)
 Disable this Rule (within its pool)
 
void clearDisable (void)
 Enable this Rule (within its pool)
 
bool checkActionBreak (void)
 Check if an action breakpoint is turned on. More...
 
uint4 getBreakPoint (void) const
 Return breakpoint toggles.
 
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 PcodeOpfindSubshift (PcodeOp *op, int4 &n, OpCode &shiftopc)
 Check for shift form of expression. More...
 

Additional Inherited Members

- Public Types inherited from ghidra::Rule
enum  typeflags { type_disable = 1, rule_debug = 2, warnings_on = 4, warnings_given = 8 }
 Properties associated with a Rule. More...
 

Detailed Description

Simplify expressions associated with optimized division expressions.

The form looks like:

where n = d + b*8, and the left-shift signedness (if it exists) matches the extension signedness.

Member Function Documentation

◆ applyOp()

int4 ghidra::RuleDivTermAdd::applyOp ( PcodeOp op,
Funcdata data 
)
virtual

◆ clone()

virtual Rule* ghidra::RuleDivTermAdd::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
grouplistis the list of groups being cloned
Returns
the cloned Rule or NULL

Implements ghidra::Rule.

References ghidra::ActionGroupList::contains(), and ghidra::AddTreeState::data.

◆ findSubshift()

PcodeOp * ghidra::RuleDivTermAdd::findSubshift ( PcodeOp op,
int4 &  n,
OpCode shiftopc 
)
static

Check for shift form of expression.

Look for the two forms:

  • sub(V,c) or
  • sub(V,c) >> n

Pass back whether a shift was involved and the total truncation in bits: n+c*8

Parameters
opis the root of the expression
nis the reference that will hold the total truncation
shiftopcwill hold the shift OpCode if used, CPUI_MAX otherwise
Returns
the SUBPIECE op if present or NULL otherwise

References ghidra::PcodeOp::code(), ghidra::CPUI_MAX, ghidra::CPUI_SUBPIECE, ghidra::Varnode::getDef(), ghidra::PcodeOp::getIn(), ghidra::Varnode::getOffset(), ghidra::PcodeOp::getOut(), ghidra::Varnode::getSize(), ghidra::Varnode::isConstant(), and ghidra::Varnode::isWritten().

◆ getOpList()

void ghidra::RuleDivTermAdd::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
oplistis the array to populate

Reimplemented from ghidra::Rule.

References ghidra::CPUI_INT_RIGHT, ghidra::CPUI_INT_SRIGHT, and ghidra::CPUI_SUBPIECE.


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