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Some adjustments to traceForward to CALLs

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This commit is contained in:
caheckman 2020-02-24 17:10:34 -05:00
parent 6beb631e39
commit 762cda04f4
3 changed files with 44 additions and 8 deletions
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29
Ghidra/Features/Decompiler/src/decompile/cpp/op.cc
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@ -81,6 +81,35 @@ PcodeOp::PcodeOp(int4 s,const SeqNum &sq) : start(sq),inrefs(s)
inrefs[i] = (Varnode *)0;
}
/// \brief Find the slot for a given Varnode, which may be take up multiple input slots
///
/// In the rare case that \b this PcodeOp takes the same Varnode as input multiple times,
/// use the specific descendant iterator producing \b this PcodeOp to work out the corresponding slot.
/// Every slot containing the given Varnode will be produced exactly once over the course of iteration.
/// \param vn is the given Varnode
/// \param firstSlot is the first instance of the Varnode in \b this input list
/// \param iter is the specific descendant iterator producing \b this
/// \return the slot corresponding to the iterator
int4 PcodeOp::getRepeatSlot(const Varnode *vn,int4 firstSlot,list<PcodeOp *>::const_iterator iter) const
{
int4 count = 1;
for(list<PcodeOp *>::const_iterator oiter=vn->beginDescend();oiter != iter;++oiter) {
if ((*oiter) == this)
count += 1;
}
if (count == 1) return firstSlot;
int4 recount = 1;
for(int4 i=firstSlot+1;i<inrefs.size();++i) {
if (inrefs[i] == vn) {
recount += 1;
if (recount == count)
return i;
}
}
return -1;
}
/// Can this be collapsed to a copy op, i.e. are all inputs constants
/// \return \b true if this op can be callapsed
bool PcodeOp::isCollapsible(void) const