public void Emit(OpcodeEncoder opcode, Operand symbolOperand, int symbolOffset)
{
int pos = (int)codeStream.Position + symbolOffset;
Emit(opcode);
if (symbolOperand.IsLabel)
{
linker.Link(LinkType.AbsoluteAddress, PatchType.I4, MethodName, SectionKind.Text, pos, 0, symbolOperand.Name, SectionKind.ROData, 0);
}
else if (symbolOperand.IsField)
{
var section = symbolOperand.Field.Data != null ? SectionKind.ROData : SectionKind.BSS;
linker.Link(LinkType.AbsoluteAddress, PatchType.I4, MethodName, SectionKind.Text, pos, 0, symbolOperand.Field.FullName, section, (int)symbolOperand.Displacement);
}
else if (symbolOperand.IsSymbol)
{
var section = symbolOperand.Method != null ? SectionKind.Text : SectionKind.ROData;
var symbol = linker.GetSymbol(symbolOperand.Name, section);
if (symbol == null)
{
symbol = linker.FindSymbol(symbolOperand.Name);
}
linker.Link(LinkType.AbsoluteAddress, PatchType.I4, MethodName, SectionKind.Text, pos, 0, symbol, 0);
}
}
/// <summary>
/// Initializes a new instance of <see cref="BaseCodeEmitter" />.
/// </summary>
/// <param name="methodName">Name of the method.</param>
/// <param name="linker">The linker.</param>
/// <param name="codeStream">The stream the machine code is written to.</param>
public void Initialize(string methodName, BaseLinker linker, Stream codeStream)
{
Debug.Assert(codeStream != null);
Debug.Assert(linker != null);
MethodName = methodName;
this.linker = linker;
this.codeStream = codeStream;
// only necessary if method is being recompiled (due to inline optimization, for example)
var symbol = linker.GetSymbol(MethodName, SectionKind.Text);
symbol.RemovePatches();
}
public void Emit(BaseOpcodeEncoder opcode, Operand symbolOperand, int patchOffset, int referenceOffset = 0)
{
int pos = (int)codeStream.Position + patchOffset;
Emit(opcode);
if (symbolOperand.IsLabel)
{
linker.Link(LinkType.AbsoluteAddress, PatchType.I4, SectionKind.Text, MethodName, pos, SectionKind.ROData, symbolOperand.Name, referenceOffset);
}
else if (symbolOperand.IsStaticField)
{
var section = symbolOperand.Field.Data != null ? SectionKind.ROData : SectionKind.BSS;
linker.Link(LinkType.AbsoluteAddress, PatchType.I4, SectionKind.Text, MethodName, pos, section, symbolOperand.Field.FullName, referenceOffset);
}
else if (symbolOperand.IsSymbol)
{
var section = symbolOperand.Method != null ? SectionKind.Text : SectionKind.ROData;
// First try finding the symbol in the expected section
var symbol = linker.FindSymbol(symbolOperand.Name, section);
// If no symbol found, look in all sections
if (symbol == null)
{
symbol = linker.FindSymbol(symbolOperand.Name);
}
// Otherwise create the symbol in the expected section
if (symbol == null)
{
symbol = linker.GetSymbol(symbolOperand.Name, section);
}
linker.Link(LinkType.AbsoluteAddress, PatchType.I4, SectionKind.Text, MethodName, pos, symbol, referenceOffset);
}
}
public static IntPtr GetMethodAddress(MosaMethod method, BaseLinker linker)
{
var symbol = linker.GetSymbol(method.FullName, SectionKind.Text);
return(new IntPtr((long)symbol.VirtualAddress));
}
public static ulong GetMethodAddress(MosaMethod method, BaseLinker linker)
{
var symbol = linker.GetSymbol(method.FullName, SectionKind.Text);
return symbol.VirtualAddress;
}
protected void EmitLink(int position, Operand symbolOperand, int patchOffset, int referenceOffset = 0)
{
position += patchOffset;
if (symbolOperand.IsLabel)
{
linker.Link(LinkType.AbsoluteAddress, PatchType.I4, SectionKind.Text, MethodName, position, SectionKind.ROData, symbolOperand.Name, referenceOffset);
}
else if (symbolOperand.IsStaticField)
{
var section = symbolOperand.Field.Data != null ? SectionKind.ROData : SectionKind.BSS;
linker.Link(LinkType.AbsoluteAddress, PatchType.I4, SectionKind.Text, MethodName, position, section, symbolOperand.Field.FullName, referenceOffset);
}
else if (symbolOperand.IsSymbol)
{
var section = symbolOperand.Method != null ? SectionKind.Text : SectionKind.ROData;
// First try finding the symbol in the expected section
// If no symbol found, look in all sections
// Otherwise create the symbol in the expected section
var symbol = (linker.FindSymbol(symbolOperand.Name, section) ?? linker.FindSymbol(symbolOperand.Name)) ?? linker.GetSymbol(symbolOperand.Name, section);
linker.Link(LinkType.AbsoluteAddress, PatchType.I4, SectionKind.Text, MethodName, position, symbol, referenceOffset);
}
}