public override Stream RequestCodeStream()
{
LinkerStream stream = base.RequestCodeStream() as LinkerStream;
VirtualMemoryStream vms = (VirtualMemoryStream)stream.BaseStream;
if (address == IntPtr.Zero)
{
address = new IntPtr(vms.Base.ToInt64() + vms.Position);
}
return(stream);
}
/// <summary>
/// Allocates a stream of the specified size from the section.
/// </summary>
/// <param name="size">The size.</param>
/// <param name="alignment">The alignment.</param>
/// <returns></returns>
public Stream Allocate(int size, int alignment)
{
Stream stream = this.stream;
if (stream == null)
{
// Request 4Mb of memory
VirtualMemoryStream vms = new VirtualMemoryStream(global::Mosa.Internal.Runtime.MemoryPageManager, 1024 * 1024 * 4);
// Save the stream for further references
this.stream = stream = vms;
base.VirtualAddress = vms.Base;
}
if (size != 0 && size > (stream.Length - stream.Position))
throw new OutOfMemoryException(@"Not enough space in section to allocate symbol.");
return stream;
}
/// <summary>
/// Allocates a stream of the specified size from the section.
/// </summary>
/// <param name="size">The size.</param>
/// <param name="alignment">The alignment.</param>
/// <returns></returns>
public Stream Allocate(int size, int alignment)
{
Stream stream = this.stream;
if (null == stream)
{
// Request 64K of memory
VirtualMemoryStream vms = new VirtualMemoryStream(global::Mosa.Vm.Runtime.MemoryPageManager, 16 * 4096);
// Save the stream for further references
this.stream = stream = vms;
base.VirtualAddress = vms.Base;
}
if (size != 0 && size > (stream.Length - stream.Position))
throw new OutOfMemoryException(@"Not enough space in section to allocate symbol.");
return stream;
}
/// <summary>
/// Allocates a symbol of the given name in the specified section.
/// </summary>
/// <param name="name">The name of the symbol.</param>
/// <param name="section">The executable section to allocate from.</param>
/// <param name="size">The number of bytes to allocate. If zero, indicates an unknown amount of memory is required.</param>
/// <param name="alignment">The alignment. A value of zero indicates the use of a default alignment for the section.</param>
/// <returns>
/// A stream, which can be used to populate the section.
/// </returns>
public override Stream Allocate(string name, SectionKind section, int size, int alignment)
{
LinkerStream stream = (LinkerStream)base.Allocate(name, section, size, alignment);
try
{
VirtualMemoryStream vms = (VirtualMemoryStream)stream.BaseStream;
LinkerSymbol symbol = GetSymbol(name);
symbol.VirtualAddress = new IntPtr(vms.Base.ToInt64() + vms.Position);
Trace.WriteLine("Symbol " + name + " located at 0x" + symbol.VirtualAddress.ToInt32().ToString("x08"));
}
catch
{
stream.Dispose();
throw;
}
return(stream);
}