private LinkerSymbol CreateMethodDefinition(MosaMethod method)
{
// Emit method name
var methodNameSymbol = EmitStringWithLength(method.FullName + Metadata.NameString, method.FullName);
// Emit method table
var methodTableSymbol = Linker.CreateSymbol(method.FullName + Metadata.MethodDefinition, SectionKind.ROData, TypeLayout.NativePointerAlignment, 0);
var writer1 = new EndianAwareBinaryWriter(methodTableSymbol.Stream, Architecture.Endianness);
// 1. Pointer to Name
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, methodTableSymbol, (int)writer1.Position, 0, methodNameSymbol, 0);
writer1.WriteZeroBytes(TypeLayout.NativePointerSize);
// 2. Pointer to Custom Attributes
if (method.CustomAttributes.Count > 0)
{
var customAttributeListSymbol = CreateCustomAttributesTable(method);
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, methodTableSymbol, (int)writer1.Position, 0, customAttributeListSymbol, 0);
}
writer1.WriteZeroBytes(TypeLayout.NativePointerSize);
// 3. Attributes
writer1.Write((uint)method.MethodAttributes, TypeLayout.NativePointerSize);
// 4. Local Stack Size (16 Bits) && Parameter Stack Size (16 Bits)
int value = TypeLayout.GetMethodStackSize(method) | (TypeLayout.GetMethodParameterStackSize(method) << 16);
writer1.Write(value, TypeLayout.NativePointerSize);
// 5. Pointer to Method
if (!method.IsAbstract)
{
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, methodTableSymbol, (int)writer1.Position, 0, method.FullName, SectionKind.Text, 0);
}
writer1.WriteZeroBytes(TypeLayout.NativePointerSize);
// 6. Pointer to return type
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, methodTableSymbol, (int)writer1.Position, 0, method.Signature.ReturnType.FullName + Metadata.TypeDefinition, SectionKind.ROData, 0);
writer1.WriteZeroBytes(TypeLayout.NativePointerSize);
// 7. Pointer to Exception Handler Table
if (method.ExceptionHandlers.Count != 0)
{
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, methodTableSymbol, (int)writer1.Position, 0, method.FullName + Metadata.ProtectedRegionTable, SectionKind.ROData, 0);
}
writer1.WriteZeroBytes(TypeLayout.NativePointerSize);
// 8. Pointer to GC Tracking information
// TODO: This has yet to be designed.
writer1.WriteZeroBytes(TypeLayout.NativePointerSize);
// 9. Number of Parameters
writer1.Write((uint)method.Signature.Parameters.Count, TypeLayout.NativePointerSize);
// 10. Pointers to Parameter Definitions
foreach (var parameter in method.Signature.Parameters)
{
// Create definition and get the symbol
var parameterDefinitionSymbol = CreateParameterDefinition(parameter);
// Link
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, methodTableSymbol, (int)writer1.Position, 0, parameterDefinitionSymbol, 0);
writer1.WriteZeroBytes(TypeLayout.NativePointerSize);
}
// Return methodTableSymbol for linker usage
return(methodTableSymbol);
}
