private void EmitFields()
{
writer.WriteLine("[Fields]");
writer.WriteLine("TypeID\tIndex\tFullName\tName\tFieldTypeID\tAddress\tAttributes\tOffset\tDataLength\tDataAddress");
foreach (var type in TypeSystem.AllTypes)
{
if (type.IsModule)
{
continue;
}
int index = 0;
foreach (var field in type.Fields)
{
var symbolName = Metadata.FieldDefinition + field.FullName;
if (!Linker.IsSymbolDefined(symbolName))
{
continue;
}
var symbol = Linker.GetSymbol(symbolName);
//var datasection = (field.Data != null) ? SectionKind.ROData : SectionKind.BSS; // not used yet
writer.WriteLine(
"{0}\t{1}\t{2}\t{3}\t{4}\t{5:x8}\t{6}\t{7}\t{8}\t{9:x8}",
type.ID,
index++,
field.FullName,
field.Name,
field.FieldType.ID,
symbol?.VirtualAddress ?? 0,
(int)field.FieldAttributes,
field.IsStatic && !field.IsLiteral ? 0 : TypeLayout.GetFieldOffset(field), // todo: missing first offset
field.Data?.Length ?? 0,
0 // todo: DataAddress
);
}
}
}
private LinkerSymbol CreateFieldDefinitions(MosaType type)
{
// Emit fields table
var fieldsTableSymbol = Linker.DefineSymbol(Metadata.FieldsTable + type.FullName, SectionKind.ROData, TypeLayout.NativePointerAlignment, 0);
var writer1 = new EndianAwareBinaryWriter(fieldsTableSymbol.Stream, Architecture.Endianness);
// 1. Number of Fields
writer1.Write((uint)type.Fields.Count, TypeLayout.NativePointerSize);
// 2. Pointers to Field Definitions
foreach (var field in type.Fields)
{
// Emit field name
var fieldNameSymbol = EmitStringWithLength(Metadata.NameString + field.FullName, field.Name);
// Emit field definition
var fieldDefSymbol = Linker.DefineSymbol(Metadata.FieldDefinition + field.FullName, SectionKind.ROData, TypeLayout.NativePointerAlignment, 0);
var writer2 = new EndianAwareBinaryWriter(fieldDefSymbol.Stream, Architecture.Endianness);
// 1. Name
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldDefSymbol, writer2.Position, fieldNameSymbol, 0);
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
// 2. Pointer to Custom Attributes
if (field.CustomAttributes.Count > 0)
{
var customAttributesTableSymbol = CreateCustomAttributesTable(field);
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldDefSymbol, writer2.Position, customAttributesTableSymbol, 0);
}
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
// 3. Attributes
writer2.Write((uint)field.FieldAttributes, TypeLayout.NativePointerSize);
// 4. Pointer to Field Type
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldDefSymbol, writer2.Position, Metadata.TypeDefinition + field.FieldType.FullName, 0);
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
// 5 & 6. Offset / Address + Size
if (field.IsStatic && !field.IsLiteral && !type.HasOpenGenericParams)
{
if (Compiler.MethodScanner.IsFieldAccessed(field))
{
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldDefSymbol, writer2.Position, field.FullName, 0);
}
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
writer2.Write(field.Data?.Length ?? 0, TypeLayout.NativePointerSize);
}
else
{
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
writer2.Write(TypeLayout.GetFieldOffset(field), TypeLayout.NativePointerSize);
}
// Add pointer to field list
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldsTableSymbol, writer1.Position, fieldDefSymbol, 0);
writer1.WriteZeroBytes(TypeLayout.NativePointerSize);
}
return(fieldsTableSymbol);
}
private LinkerSymbol CreateFieldDefinitions(MosaType type)
{
// Emit fields table
var fieldsTableSymbol = Linker.CreateSymbol(type.FullName + Metadata.FieldsTable, SectionKind.ROData, TypeLayout.NativePointerAlignment, 0);
var writer1 = new EndianAwareBinaryWriter(fieldsTableSymbol.Stream, Architecture.Endianness);
// 1. Number of Fields
writer1.Write((uint)type.Fields.Count, TypeLayout.NativePointerSize);
// 2. Pointers to Field Definitions
foreach (MosaField field in type.Fields)
{
// Emit field name
var fieldNameSymbol = EmitStringWithLength(field.FullName + Metadata.NameString, field.Name);
// Emit field definition
var fieldDefSymbol = Linker.CreateSymbol(field.FullName + Metadata.FieldDefinition, SectionKind.ROData, TypeLayout.NativePointerAlignment, 0);
var writer2 = new EndianAwareBinaryWriter(fieldDefSymbol.Stream, Architecture.Endianness);
// 1. Name
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldDefSymbol, (int)writer2.Position, 0, fieldNameSymbol, 0);
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
// 2. Pointer to Custom Attributes
if (field.CustomAttributes.Count > 0)
{
var customAttributesTableSymbol = CreateCustomAttributesTable(field);
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldDefSymbol, (int)writer2.Position, 0, customAttributesTableSymbol, 0);
}
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
// 3. Attributes
writer2.Write((uint)field.FieldAttributes, TypeLayout.NativePointerSize);
// 4. Pointer to Field Type
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldDefSymbol, (int)writer2.Position, 0, field.FieldType.FullName + Metadata.TypeDefinition, SectionKind.ROData, 0);
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
// 5 & 6. Offset / Address + Size
if (field.IsStatic && !field.IsLiteral)
{
var section = (field.Data != null) ? SectionKind.ROData : SectionKind.BSS;
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldDefSymbol, (int)writer2.Position, 0, field.FullName, section, 0);
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
writer2.Write((field.Data != null) ? field.Data.Length : 0, TypeLayout.NativePointerSize);
}
else
{
writer2.WriteZeroBytes(TypeLayout.NativePointerSize);
writer2.Write(TypeLayout.GetFieldOffset(field), TypeLayout.NativePointerSize);
}
// Create another symbol with field data if any
if (field.IsStatic)
{
// Assign a memory slot to the static & initialize it, if there's initial data set
// Determine the size of the type & alignment requirements
int size, alignment;
Architecture.GetTypeRequirements(TypeLayout, field.FieldType, out size, out alignment);
size = TypeLayout.GetFieldSize(field);
// The linker section to move this field into
SectionKind section = field.Data != null ? section = SectionKind.ROData : section = SectionKind.BSS;
var symbol = Compiler.Linker.CreateSymbol(field.FullName, section, alignment, size);
if (field.Data != null)
{
symbol.Stream.Write(field.Data, 0, size);
}
}
// Add pointer to field list
Linker.Link(LinkType.AbsoluteAddress, NativePatchType, fieldsTableSymbol, (int)writer1.Position, 0, fieldDefSymbol, 0);
writer1.WriteZeroBytes(TypeLayout.NativePointerSize);
}
// Return fieldsTableSymbol for linker usage
return(fieldsTableSymbol);
}