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Adjustments to STORE casting

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This commit is contained in:
caheckman 2019-11-04 11:15:52 -05:00
parent 9a3ab38631
commit a700c52275
1 changed files with 29 additions and 9 deletions
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38
Ghidra/Features/Decompiler/src/decompile/cpp/typeop.cc
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@ -427,17 +427,37 @@ TypeOpStore::TypeOpStore(TypeFactory *t) : TypeOp(t,CPUI_STORE,"store")
Datatype *TypeOpStore::getInputCast(const PcodeOp *op,int4 slot,const CastStrategy *castStrategy) const
{
if (slot!=1) return (Datatype *)0;
Datatype *reqtype = op->getIn(2)->getHigh()->getType(); // Cast storage pointer to match what's being stored
Datatype *curtype = op->getIn(1)->getHigh()->getType();
if (slot==0) return (Datatype *)0;
const Varnode *pointerVn = op->getIn(1);
Datatype *pointerType = pointerVn->getHigh()->getType();
Datatype *valueType = op->getIn(2)->getHigh()->getType();
AddrSpace *spc = Address::getSpaceFromConst(op->getIn(0)->getAddr());
if (curtype->getMetatype() == TYPE_PTR)
curtype = ((TypePointer *)curtype)->getPtrTo();
int4 destSize;
if (pointerType->getMetatype() == TYPE_PTR) {
pointerType = ((TypePointer *)pointerType)->getPtrTo();
destSize = pointerType->getSize();
}
else
return tlst->getTypePointer(op->getIn(1)->getSize(),reqtype,spc->getWordSize());
reqtype = castStrategy->castStandard(reqtype,curtype,false,true);
if (reqtype == (Datatype *)0) return reqtype;
return tlst->getTypePointer(op->getIn(1)->getSize(),reqtype,spc->getWordSize());
destSize = -1;
if (destSize != valueType->getSize()) {
if (slot == 1)
return tlst->getTypePointer(pointerVn->getSize(),valueType,spc->getWordSize());
else
return (Datatype *)0;
}
if (slot == 1) {
if (pointerVn->isWritten() && pointerVn->getDef()->code() == CPUI_CAST) {
if (pointerVn->isImplied() && pointerVn->loneDescend() == op) {
// CAST is already in place, test if it is casting to the right type
Datatype *newType = tlst->getTypePointer(pointerVn->getSize(), valueType, spc->getWordSize());
if (pointerVn->getHigh()->getType() != newType)
return newType;
}
}
return (Datatype *)0;
}
// If we reach here, cast the value, not the pointer
return castStrategy->castStandard(pointerType,valueType,false,true);
}
void TypeOpStore::printRaw(ostream &s,const PcodeOp *op)