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GP-2627 TypePartialStruct

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This commit is contained in:
caheckman 2023-03-14 13:25:39 -04:00
parent cc35d57933
commit 2591c17f22
15 changed files with 636 additions and 433 deletions
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22
Ghidra/Features/Decompiler/src/decompile/cpp/funcdata_varnode.cc
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@ -869,24 +869,6 @@ bool Funcdata::syncVarnodesWithSymbols(const ScopeLocal *lm,bool updateDatatypes
return updateoccurred;
}
/// If the Varnode is a partial of a Symbol with a \e union data-type component, we assign
/// a partial union data-type (TypePartialUnion) to the Varnode, so that facing resolutions
/// can be provided.
/// \param vn is the given Varnode
/// \return the partial data-type or null
Datatype *Funcdata::checkSymbolType(Varnode *vn)
{
if (vn->isTypeLock()) return vn->getType();
SymbolEntry *entry = vn->getSymbolEntry();
Symbol *sym = entry->getSymbol();
Datatype *curType = sym->getType();
if (curType->getSize() == vn->getSize())
return (Datatype *)0;
int4 curOff = (vn->getAddr().getOffset() - entry->getAddr().getOffset()) + entry->getOffset();
return glb->types->getExactPiece(curType, curOff, vn->getSize());
}
/// A Varnode overlaps the given SymbolEntry. Make sure the Varnode is part of the variable
/// underlying the Symbol. If not, remap things so that the Varnode maps to a distinct Symbol.
/// In either case, attach the appropriate Symbol to the Varnode
@ -1037,9 +1019,11 @@ void Funcdata::linkProtoPartial(Varnode *vn)
Varnode *rootVn = PieceNode::findRoot(vn);
if (rootVn == vn) return;
Varnode *nameRep = rootVn->getHigh()->getNameRepresentative();
HighVariable *rootHigh = rootVn->getHigh();
Varnode *nameRep = rootHigh->getNameRepresentative();
Symbol *sym = linkSymbol(nameRep);
if (sym == (Symbol *)0) return;
rootHigh->establishGroupSymbolOffset();
SymbolEntry *entry = sym->getFirstWholeMap();
vn->setSymbolEntry(entry);
}