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GP-2767 Structured pieces

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This commit is contained in:
caheckman 2022-10-27 16:43:58 -04:00
parent b707c2ea6b
commit 535ac7c08d
29 changed files with 834 additions and 210 deletions
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46
Ghidra/Features/Decompiler/src/decompile/cpp/variable.cc
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@ -24,8 +24,9 @@ AttributeId ATTRIB_SYMREF = AttributeId("symref",68);
ElementId ELEM_HIGH = ElementId("high",82);
/// Compare by offset within the group, then by size.
/// \param op2 is the other piece to compare with \b this
/// \return \b true if \b this should be ordered before the other piece
/// \param a is the first piece to compare
/// \param b is the other piece to compare
/// \return \b true if \b a should be ordered before the \b b
bool VariableGroup::PieceCompareByOffset::operator()(const VariablePiece *a,const VariablePiece *b) const
{
@ -145,7 +146,7 @@ void VariablePiece::adjustOffset(int4 amt)
}
/// If there are no remaining references to the old VariableGroup it is deleted.
/// \param newGropu is the new VariableGroup to transfer \b this to
/// \param newGroup is the new VariableGroup to transfer \b this to
void VariablePiece::transferGroup(VariableGroup *newGroup)
{
@ -227,15 +228,26 @@ void HighVariable::setSymbol(Varnode *vn) const
}
}
symbol = entry->getSymbol();
if (entry->isDynamic()) // Dynamic symbols match whole variable
if (vn->isProtoPartial()) {
Varnode *rootVn = PieceNode::findRoot(vn);
if (rootVn == vn)
throw LowlevelError("Partial varnode does not match symbol");
symboloffset = vn->getAddr().overlap(0,rootVn->getAddr(),rootVn->getSize());
SymbolEntry *entry = rootVn->getSymbolEntry();
if (entry != (SymbolEntry *)0)
symboloffset += entry->getOffset();
}
else if (entry->isDynamic()) // Dynamic symbols (that aren't partials) match whole variable
symboloffset = -1;
else if (symbol->getCategory() == Symbol::equate)
symboloffset = -1; // For equates, we don't care about size
else if (symbol->getType()->getSize() == vn->getSize() &&
entry->getAddr() == vn->getAddr() && !entry->isPiece())
symboloffset = -1; // A matching entry
else
else {
symboloffset = vn->getAddr().overlap(0,entry->getAddr(),symbol->getType()->getSize()) + entry->getOffset();
}
highflags &= ~((uint4)symboldirty); // We are no longer dirty
}
@ -455,6 +467,21 @@ Varnode *HighVariable::getNameRepresentative(void) const
return nameRepresentative;
}
/// Find the first member that is either address tied or marked as a proto partial.
/// \return a member Varnode acting as partial storage or null if none exist
Varnode *HighVariable::getPartial(void) const
{
int4 i;
for(i=0;i<inst.size();++i) {
Varnode *vn = inst[i];
if (vn->isAddrTied() || vn->isProtoPartial())
return vn;
}
return (Varnode *)0;
}
/// Search for the given Varnode and cut it out of the list, marking all properties as \e dirty.
/// \param vn is the given Varnode member to remove
void HighVariable::remove(Varnode *vn)
@ -726,6 +753,15 @@ int4 HighVariable::instanceIndex(const Varnode *vn) const
return -1;
}
/// \param op2 is the other HighVariable to compare with \b this
/// \return \b true if they are in the same group
bool HighVariable::sameGroup(const HighVariable *op2) const
{
if (piece == (VariablePiece *)0 || op2->piece == (VariablePiece *)0) return false;
return (piece->getGroup() == op2->piece->getGroup());
}
/// \param encoder is the stream encoder
void HighVariable::encode(Encoder &encoder) const