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GP-3688 RuleSubNormal shouldn't apply to double precision SUBPIECE

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caheckman 2023-08-01 23:13:22 +00:00
parent 87be0574fc
commit ff76fdb730
1 changed files with 3 additions and 1 deletions
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4
Ghidra/Features/Decompiler/src/decompile/cpp/ruleaction.cc
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@ -7227,11 +7227,13 @@ int4 RuleSubNormal::applyOp(PcodeOp *op,Funcdata &data)
if (!shiftop->getIn(1)->isConstant()) return 0;
Varnode *a = shiftop->getIn(0);
if (a->isFree()) return 0;
Varnode *outvn = op->getOut();
if (outvn->isPrecisHi() || outvn->isPrecisLo()) return 0;
int4 n = shiftop->getIn(1)->getOffset();
int4 c = op->getIn(1)->getOffset();
int4 k = (n/8);
int4 insize = a->getSize();
int4 outsize = op->getOut()->getSize();
int4 outsize = outvn->getSize();
// Total shift + outsize must be greater equal to size of input
if ((n+8*c+8*outsize < 8*insize)&&(n != k*8)) return 0;