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GP-3424 Near/far pointer data-type propagation

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This commit is contained in:
caheckman 2023-05-05 14:58:49 -04:00
parent 007cfacd6c
commit 3c08b44a1e
21 changed files with 403 additions and 292 deletions
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14
Ghidra/Features/Decompiler/src/decompile/cpp/unionresolve.cc
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@ -232,7 +232,7 @@ Datatype *ScoreUnionFields::derefPointer(Datatype *ct,Varnode *vn,int4 &score)
if (ct->getMetatype() == TYPE_PTR) {
Datatype *ptrto = ((TypePointer *)ct)->getPtrTo();
while(ptrto != (Datatype *)0 && ptrto->getSize() > vn->getSize()) {
uintb newoff;
int8 newoff;
ptrto = ptrto->getSubType(0, &newoff);
}
if (ptrto != (Datatype *)0 && ptrto->getSize() == vn->getSize()) {
@ -429,8 +429,8 @@ void ScoreUnionFields::scoreTrialDown(const Trial &trial,bool lastLevel)
Varnode *vn = trial.op->getIn(1-trial.inslot);
if (vn->isConstant()) {
TypePointer *baseType = (TypePointer *)trial.fitType;
uintb off = vn->getOffset();
uintb parOff;
int8 off = vn->getOffset();
int8 parOff;
TypePointer *par;
resType = baseType->downChain(off,par,parOff,trial.array,typegrp);
if (resType != (Datatype*)0)
@ -860,16 +860,16 @@ Datatype *ScoreUnionFields::scoreTruncation(Datatype *ct,Varnode *vn,int4 offset
}
}
else {
uintb off = offset;
score = 10; // If we can find a size match for the truncation
while(ct != (Datatype*)0 && (off != 0 || ct->getSize() != vn->getSize())) {
int8 curOff = offset;
while(ct != (Datatype*)0 && (curOff != 0 || ct->getSize() != vn->getSize())) {
if (ct->getMetatype() == TYPE_INT || ct->getMetatype() == TYPE_UINT) {
if (ct->getSize() >= vn->getSize() + off) {
if (ct->getSize() >= vn->getSize() + curOff) {
score = 1; // Size doesn't match, but still possibly a reasonable operation
break;
}
}
ct = ct->getSubType(off,&off);
ct = ct->getSubType(curOff,&curOff);
}
if (ct == (Datatype *)0)
score = -10;