public void BwAndMask()
{
var eax = m.Frame.EnsureRegister(Registers.eax);
var bw = new Backwalker(host, new RtlGoto(m.LoadDw(m.IAdd(eax, 0x10000)), RtlClass.Transfer), expSimp);
Assert.IsFalse(bw.BackwalkInstruction(m.Assign(eax, m.And(eax, 0x7))));
Assert.AreSame(Registers.eax, bw.Index);
Assert.AreEqual(0x10000ul, bw.VectorAddress.ToLinear());
Assert.AreEqual("cmp 8", bw.Operations[0].ToString());
}
public void BwAdd()
{
var eax = m.Frame.EnsureRegister(Registers.eax);
var bw = new Backwalker(
host,
new RtlGoto(m.LoadDw(m.IAdd(eax, 0x10000)), RtlClass.Transfer),
expSimp);
Assert.IsTrue(bw.BackwalkInstruction(m.Assign(eax, m.IAdd(eax, eax))));
Assert.AreSame(Registers.eax, bw.Index);
Assert.AreEqual("* 2", bw.Operations[0].ToString());
Assert.AreEqual(2, bw.Stride);
}
public void BwTempRegister()
{
var v1 = m.Frame.CreateTemporary(PrimitiveType.Word32);
var edi = m.Frame.CreateTemporary(PrimitiveType.Word32);
var esi = m.Frame.EnsureRegister(Registers.esi);
var xfer = new RtlCall(m.LoadDw(m.IAdd(esi, 40)), 4, RtlClass.Transfer);
m.Assign(v1, m.LoadDw(edi));
m.Assign(esi, v1);
var bw = new Backwalker(host, xfer, expSimp);
bool result;
result = bw.BackwalkInstruction(m.Block.Statements[1].Instruction);
result = bw.BackwalkInstruction(m.Block.Statements[0].Instruction);
Assert.IsFalse(result);
Assert.AreEqual("None", bw.Index.ToString());
}
public void BwXorHiwordOfIndex()
{
var bx = m.Frame.EnsureRegister(Registers.bx);
var bl = m.Frame.EnsureRegister(Registers.bl);
var bh = m.Frame.EnsureRegister(Registers.bh);
var bw = new Backwalker(host, new RtlGoto(m.LoadDw(m.IAdd(bx, 0x1000)), RtlClass.Transfer), expSimp);
Assert.IsTrue(bw.BackwalkInstruction(
m.Assign(bh, m.Xor(bh, bh))));
Assert.AreSame(Registers.bl, bw.Index);
Assert.AreEqual("& 255", bw.Operations[0].ToString());
}
public void BwLoadIndexed()
{
var eax = m.Frame.EnsureRegister(Registers.eax);
var edx = m.Frame.EnsureRegister(Registers.edx);
var al = m.Frame.EnsureRegister(Registers.al);
m.Frame.EnsureFlagGroup(Registers.eflags, (uint)(FlagM.SF | FlagM.ZF | FlagM.CF | FlagM.OF), "SCZO", PrimitiveType.Byte);
var bw = new Backwalker(host, new RtlGoto(m.LoadDw(m.IAdd(eax, 0x1000)), RtlClass.Transfer), expSimp);
Assert.IsTrue(bw.BackwalkInstruction(
m.Assign(al, m.LoadB(m.IAdd(edx, 0x1004)))));
Assert.AreSame(Registers.edx, bw.Index);
}
public void BwMaskWithHoles()
{
var eax = m.Frame.EnsureRegister(Registers.eax);
var bw = new Backwalker(host, new RtlGoto(m.LoadDw(m.IAdd(eax, 0x10000)), RtlClass.Transfer), expSimp);
Assert.IsFalse(bw.BackwalkInstruction(m.Assign(eax, m.And(eax, 0x0A))));
Assert.IsNull(bw.Index);
Assert.AreEqual(0, bw.Operations.Count);
}
public void BwComparison()
{
var eax = m.Frame.EnsureRegister(Registers.eax);
var SCZO = m.Frame.EnsureFlagGroup(Registers.eflags, (uint)(FlagM.SF | FlagM.ZF | FlagM.CF | FlagM.OF), "SCZO", PrimitiveType.Byte);
var bw = new Backwalker(host, new RtlGoto(m.LoadDw(m.IAdd(eax, 0x1000)), RtlClass.Transfer), expSimp);
bw.UsedFlagIdentifier = m.Frame.EnsureFlagGroup(Registers.eflags,(uint)FlagM.CF, "C", PrimitiveType.Byte);
Assert.IsFalse(
bw.BackwalkInstruction(
m.Assign(SCZO, new ConditionOf(m.ISub(eax, 3)))),
"Encountering this comparison should terminate the backwalk");
Assert.AreSame(Registers.eax, bw.Index);
Assert.AreEqual("cmp 3", bw.Operations[0].ToString());
}
public void BwJmp()
{
var eax = m.Frame.EnsureRegister(Registers.eax);
var SCZO = m.Frame.EnsureFlagGroup(Registers.eflags, (uint)(FlagM.SF|FlagM.ZF|FlagM.CF|FlagM.OF), "SCZO", PrimitiveType.Byte);
var bw = new Backwalker(host, new RtlGoto(m.LoadDw(m.IAdd(eax, 0x1000)), RtlClass.Transfer), expSimp);
Assert.IsTrue(
bw.BackwalkInstruction(
m.BranchIf(
new TestCondition(ConditionCode.UGT, SCZO),
"Nizze").Instruction));
Assert.AreEqual("branch UGT", bw.Operations[0].ToString());
Assert.AreEqual("SCZO", bw.UsedFlagIdentifier.ToString());
}
