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GP-3307 Stack strings

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caheckman 2024-04-16 22:24:34 +00:00
parent 9b6ba66aa0
commit 5604178194
37 changed files with 1653 additions and 419 deletions
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15
Ghidra/Features/Decompiler/src/decompile/cpp/op.cc
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@ -756,9 +756,9 @@ int4 PcodeOp::compareOrder(const PcodeOp *bop) const
/// whether a Varnode is a leaf of this tree.
/// \param rootVn is the given root of the CONCAT tree
/// \param vn is the Varnode to test as a leaf
/// \param typeOffset is byte offset of the test Varnode within fully concatenated value
/// \param relOffset is byte offset of the test Varnode within fully concatenated value (rooted at \b rootVn)
/// \return \b true is the test Varnode is a leaf of the tree
bool PieceNode::isLeaf(Varnode *rootVn,Varnode *vn,int4 typeOffset)
bool PieceNode::isLeaf(Varnode *rootVn,Varnode *vn,int4 relOffset)
{
if (vn->isMapped() && rootVn->getSymbolEntry() != vn->getSymbolEntry()) {
@ -770,7 +770,7 @@ bool PieceNode::isLeaf(Varnode *rootVn,Varnode *vn,int4 typeOffset)
PcodeOp *op = vn->loneDescend();
if (op == (PcodeOp *)0) return true;
if (vn->isAddrTied()) {
Address addr = rootVn->getAddr() + typeOffset;
Address addr = rootVn->getAddr() + relOffset;
if (vn->getAddr() != addr) return true;
}
return false;
@ -820,17 +820,18 @@ Varnode *PieceNode::findRoot(Varnode *vn)
/// \param stack holds the markup for each node of the tree
/// \param rootVn is the given root of the tree
/// \param op is the current PIECE op to explore as part of the tree
/// \param baseOffset is the offset associated with the output of the current PIECE op
void PieceNode::gatherPieces(vector<PieceNode> &stack,Varnode *rootVn,PcodeOp *op,int4 baseOffset)
/// \param baseOffset is the offset associated with the output of the current PIECE op wihtin the data-type
/// \param rootOffset is the offset of the \b rootVn within the data-type
void PieceNode::gatherPieces(vector<PieceNode> &stack,Varnode *rootVn,PcodeOp *op,int4 baseOffset,int4 rootOffset)
{
for(int4 i=0;i<2;++i) {
Varnode *vn = op->getIn(i);
int4 offset = (rootVn->getSpace()->isBigEndian() == (i==1)) ? baseOffset + op->getIn(1-i)->getSize() : baseOffset;
bool res = isLeaf(rootVn,vn,offset);
bool res = isLeaf(rootVn,vn,offset-rootOffset);
stack.emplace_back(op,i,offset,res);
if (!res)
gatherPieces(stack,rootVn,vn->getDef(),offset);
gatherPieces(stack,rootVn,vn->getDef(),offset,rootOffset);
}
}