public void X86St_OnBeforeCall_DecrementStackRegister()
{
var arch = new X86ArchitectureFlat32("x86-protected-32");
var state = new X86State(arch);
var esp = CreateId(Registers.esp);
state.SetRegister(Registers.esp, Constant.Word32(-4));
state.OnProcedureEntered();
var site = state.OnBeforeCall(esp, 4);
Assert.AreEqual(4, site.SizeOfReturnAddressOnStack);
Assert.AreEqual("0xFFFFFFFC", state.GetValue(esp).ToString());
}
public void StackUnderflow_ReportError()
{
var arch = new IntelArchitecture(ProcessorMode.Protected32);
string reportedError = null;
var state = new X86State(arch)
{
ErrorListener = (err) => { reportedError = err; }
};
state.OnProcedureEntered();
state.SetRegister(Registers.esp, Constant.Word32(-4)); // Push only 4 bytes
var esp = CreateId(Registers.esp);
var site = state.OnBeforeCall(esp, 4);
state.OnAfterCall(esp, new ProcedureSignature
{
StackDelta = 16, // ...but pop 16 bytes
},
new Reko.Evaluation.ExpressionSimplifier(state)); //$TODO: hm. Move simplification out of state.
Assert.IsNotNull(reportedError);
}