Convert a LOAD or STORE to the first element of a structure to a PTRSUB. More...
Public Member Functions | |
| RuleStructOffset0 (const string &g) | |
| Constructor. | |
| virtual Rule * | clone (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... | |
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
Convert a LOAD or STORE to the first element of a structure to a PTRSUB.
Data-type propagation may indicate we have a pointer to a structure, but we really need a pointer to the first element of the structure. We can tell this is happening if we load or store too little data from the pointer, interpreting it as a pointer to the structure. This Rule then applies a PTRSUB(,0) to the pointer to drill down to the first component.
Member Function Documentation
◆ applyOp()
Attempt to apply this Rule.
This method contains the main logic for applying the Rule. It must use a given PcodeOp as the point at which the Rule applies. If it does apply, changes are made directly to the function and 1 (non-zero) is returned, otherwise 0 is returned.
Reimplemented from ghidra::Rule.
References ghidra::AddrSpace::addressToByteInt(), ghidra::AddTreeState::baseType, ghidra::PcodeOp::code(), ghidra::CPUI_LOAD, ghidra::CPUI_PTRSUB, ghidra::CPUI_STORE, ghidra::AddTreeState::ct, ghidra::PcodeOp::getIn(), ghidra::Datatype::getMetatype(), ghidra::PcodeOp::getOut(), ghidra::TypePointerRel::getParent(), ghidra::TypePointerRel::getPointerOffset(), ghidra::Varnode::getSize(), ghidra::Datatype::getSize(), ghidra::Datatype::getSubType(), ghidra::Varnode::getType(), ghidra::Varnode::getTypeReadFacing(), ghidra::TypePointer::getWordSize(), ghidra::Funcdata::hasTypeRecoveryStarted(), ghidra::Funcdata::inheritResolution(), ghidra::Datatype::isFormalPointerRel(), ghidra::Datatype::needsResolution(), ghidra::Funcdata::newConstant(), ghidra::Funcdata::newOpBefore(), ghidra::AddTreeState::offset, ghidra::Funcdata::opSetInput(), ghidra::PcodeOp::setStopTypePropagation(), ghidra::TYPE_ARRAY, ghidra::TYPE_PTR, and ghidra::TYPE_STRUCT.
◆ clone()
|
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
-
grouplist is the list of groups being cloned
- Returns
- the cloned Rule or NULL
Implements ghidra::Rule.
References ghidra::ActionGroupList::contains(), and ghidra::AddTreeState::data.
◆ getOpList()
|
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
-
oplist is the array to populate
Reimplemented from ghidra::Rule.
References ghidra::CPUI_LOAD, and ghidra::CPUI_STORE.
The documentation for this class was generated from the following files:
- ruleaction.hh
- ruleaction.cc
