public void StackReturn(DataType dt)
{
var stg = new StackArgumentStorage(stackOffset, dt);
stackOffset += Align(dt.Size, stackAlignment);
this.Return = stg;
}
public void StackParam(DataType dt)
{
var stg = new StackArgumentStorage(stackOffset, dt);
stackOffset += Align(dt.Size, stackAlignment);
Parameters.Add(stg);
}
public override bool Equals(object obj)
{
StackArgumentStorage sas = obj as StackArgumentStorage;
if (sas == null)
{
return(false);
}
return(StackOffset == sas.StackOffset);
}
public Identifier FindStackArgument(int offset, int size)
{
foreach (Identifier id in identifiers)
{
StackArgumentStorage s = id.Storage as StackArgumentStorage;
if (s != null && s.StackOffset == offset && id.DataType.Size == size)
{
return(id);
}
}
return(null);
}
public Expression VisitStackArgumentStorage(StackArgumentStorage stack)
{
if (ensureVariables)
{
return(frame.EnsureStackVariable(
stack.StackOffset - (site.StackDepthOnEntry + sigCallee.ReturnAddressOnStack),
stack.DataType));
}
else
{
return(arch.CreateStackAccess(frame, stack.StackOffset, stack.DataType));
}
}
public override int OffsetOf(Storage stgSub)
{
StackArgumentStorage arg = stgSub as StackArgumentStorage;
if (arg == null)
{
return(-1);
}
if (arg.StackOffset >= StackOffset && arg.StackOffset + arg.DataType.Size <= StackOffset + DataType.Size)
{
return((arg.StackOffset - StackOffset) * DataType.BitsPerByte);
}
return(-1);
}
/// <summary>
/// Returns the number of bytes the stack arguments consume on the stack.
/// </summary>
/// <returns></returns>
public int GetStackArgumentSpace()
{
int cbMax = 0;
foreach (Identifier id in identifiers)
{
StackArgumentStorage sa = id.Storage as StackArgumentStorage;
if (sa == null)
{
continue;
}
cbMax = Math.Max(cbMax, sa.StackOffset + sa.DataType.Size);
}
return(cbMax);
}
public Expression VisitStackArgumentStorage(StackArgumentStorage stack)
{
if (ensureVariables)
{
return(binder.EnsureStackVariable(
stack.StackOffset - site.StackDepthOnEntry,
stack.DataType));
}
else
{
return(arch.CreateStackAccess(
binder,
stack.StackOffset - site.SizeOfReturnAddressOnStack,
stack.DataType));
}
}
/// <summary>
/// The offset of a variable from the return address, as seen from a caller.
/// </summary>
/// <param name="var"></param>
/// <returns></returns>
public int ExternalOffset(Identifier id)
{
if (id == null)
{
return(0);
}
StackArgumentStorage stVar = id.Storage as StackArgumentStorage;
if (stVar != null)
{
return(stVar.StackOffset);
}
FpuStackStorage fstVar = id.Storage as FpuStackStorage;
if (fstVar != null)
{
return(fstVar.FpuStackOffset);
}
throw new ArgumentOutOfRangeException("var", "Variable must be an argument.");
}
Identifier StorageVisitor <Identifier> .VisitStackArgumentStorage(StackArgumentStorage stack)
{
throw new NotImplementedException();
}