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Code Issues Releases Wiki Activity

GP-3783 Check for same VariableGroup before assigning partial Symbol

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This commit is contained in:
caheckman 2023-08-25 15:33:47 +00:00
parent cb3d780fb8
commit 17eb87ebf7
3 changed files with 18 additions and 6 deletions
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10
Ghidra/Features/Decompiler/src/decompile/cpp/double.cc
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@ -285,7 +285,8 @@ bool SplitVarnode::findWholeSplitToPieces(void)
}
if (subhi->code() != CPUI_SUBPIECE) return false;
if (subhi->getIn(1)->getOffset() != wholesize - hi->getSize()) return false;
whole = subhi->getIn(0);
Varnode *putativeWhole = subhi->getIn(0);
if (putativeWhole->getSize() != wholesize) return false;
if (!lo->isWritten()) return false;
PcodeOp *sublo = lo->getDef();
if (sublo->code() == CPUI_COPY) { // Go thru one level of copy, if the piece is addrtied
@ -294,14 +295,11 @@ bool SplitVarnode::findWholeSplitToPieces(void)
sublo = otherlo->getDef();
}
if (sublo->code() != CPUI_SUBPIECE) return false;
Varnode *res = sublo->getIn(0);
if (whole == (Varnode*)0)
whole = res;
else if (whole != res)
if (putativeWhole != sublo->getIn(0))
return false; // Doesn't match between pieces
if (sublo->getIn(1)->getOffset() != 0)
return false;
if (whole == (Varnode*)0) return false;
whole = putativeWhole;
}
if (whole->isWritten()) {