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Debugging RuleSless2Zero

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This commit is contained in:
caheckman 2019-07-24 10:24:56 -04:00
parent 6e44b809b9
commit b0a54473df
1 changed files with 30 additions and 30 deletions
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60
Ghidra/Features/Decompiler/src/decompile/cpp/ruleaction.cc
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@ -5280,37 +5280,37 @@ int4 RuleSLess2Zero::applyOp(PcodeOp *op,Funcdata &data)
} }
} }
else if (lvn->getOffset() == calc_mask(lvn->getSize())) { else if (lvn->getOffset() == calc_mask(lvn->getSize())) {
if (op->code() == CPUI_INT_SLESS) { multop = rvn->getDef();
multop = rvn->getDef(); Varnode *hibit = getHiBit(multop);
Varnode *hibit = getHiBit(multop); if (hibit != (Varnode *) 0) { // Test for -1 s< (hi ^ lo)
if (hibit != (Varnode *)0) { // Test for -1 s< (hi ^ lo) if (hibit->isConstant())
if (hibit->isConstant()) data.opSetInput(op, data.newConstant(hibit->getSize(), hibit->getOffset()), 1);
data.opSetInput(op,data.newConstant(hibit->getSize(),hibit->getOffset()),1); else
else data.opSetInput(op, hibit, 1);
data.opSetInput(op,hibit,1); data.opSetOpcode(op, CPUI_INT_EQUAL);
data.opSetOpcode(op,CPUI_INT_EQUAL); data.opSetInput(op, data.newConstant(hibit->getSize(), 0), 0);
data.opSetInput(op,data.newConstant(hibit->getSize(),0),0); return 1;
return 1; }
} else if (multop->code() == CPUI_SUBPIECE) {
else if (multop->code() == CPUI_SUBPIECE) { avn = multop->getIn(0);
avn = multop->getIn(0); if (avn->isFree())
if (avn->isFree()) return 0; return 0;
if (avn->getSize() + (int4)multop->getIn(1)->getOffset() == rvn->getSize()) { if (rvn->getSize() + (int4) multop->getIn(1)->getOffset() == avn->getSize()) {
// We have -1 s< SUB( avn, #hi ) // We have -1 s< SUB( avn, #hi )
data.opSetInput(op,avn,1); data.opSetInput(op, avn, 1);
data.opSetInput(op,data.newConstant(avn->getSize(),calc_mask(avn->getSize())),0); data.opSetInput(op, data.newConstant(avn->getSize(), calc_mask(avn->getSize())), 0);
return 1;
}
}
else if (multop->code() == CPUI_INT_NEGATE) {
// We have -1 s< ~avn
avn = multop->getIn(0);
if (avn->isFree()) return 0;
data.opSetInput(op,avn,0);
data.opSetInput(op,data.newConstant(avn->getSize(),0),1);
return 1; return 1;
} }
} }
else if (multop->code() == CPUI_INT_NEGATE) {
// We have -1 s< ~avn
avn = multop->getIn(0);
if (avn->isFree())
return 0;
data.opSetInput(op, avn, 0);
data.opSetInput(op, data.newConstant(avn->getSize(), 0), 1);
return 1;
}
} }
} }
else if (rvn->isConstant()) { else if (rvn->isConstant()) {
@ -5327,7 +5327,7 @@ int4 RuleSLess2Zero::applyOp(PcodeOp *op,Funcdata &data)
data.opSetInput(op,rvn,0); data.opSetInput(op,rvn,0);
return 1; return 1;
} }
else if (op->code() == CPUI_INT_SLESS) { else {
Varnode *hibit = getHiBit(multop); Varnode *hibit = getHiBit(multop);
if (hibit != (Varnode *)0) { // Test for (hi ^ lo) s< 0 if (hibit != (Varnode *)0) { // Test for (hi ^ lo) s< 0
if (hibit->isConstant()) if (hibit->isConstant())
@ -5340,7 +5340,7 @@ int4 RuleSLess2Zero::applyOp(PcodeOp *op,Funcdata &data)
else if (multop->code() == CPUI_SUBPIECE) { else if (multop->code() == CPUI_SUBPIECE) {
avn = multop->getIn(0); avn = multop->getIn(0);
if (avn->isFree()) return 0; if (avn->isFree()) return 0;
if (avn->getSize() + (int4)multop->getIn(1)->getOffset() == lvn->getSize()) { if (lvn->getSize() + (int4)multop->getIn(1)->getOffset() == avn->getSize()) {
// We have SUB( avn, #hi ) s< 0 // We have SUB( avn, #hi ) s< 0
data.opSetInput(op,avn,0); data.opSetInput(op,avn,0);
data.opSetInput(op,data.newConstant(avn->getSize(),0),1); data.opSetInput(op,data.newConstant(avn->getSize(),0),1);