public override void Process(Compiler compiler, MethodData methodData, Instruction instruction)
{
// Get .ctor method from operand and get the class associated with it
MethodReference ctor = instruction.Operand as MethodReference;
TypeReference type = ctor.DeclaringType;
// If the object type is native, we ignore the IL object and don't emit a NEWOBJ
// After that, we call the .CTOR which will be in runtime
// The .CTOR in runtime will also initialize this object
if(Util.IsNativeType(type))
{
// Create call to .CTOR
Instruction call = Instruction.Create(OpCodes.Call, ctor);
compiler.HandleInstruction(call, methodData);
return;
}
// Write opcode and class ID
int classID = compiler.GetTypeDataFromType(type.Resolve()).Id;
methodData.AddInstruction(instruction.OpCode.Value);
methodData.AddInstruction(classID);
// Write CALL to .ctor
// Count one extra parameter for the "this" object
MethodDefinition methodDef = ctor.Resolve();
int ctorID = compiler.GetMethodID(methodDef);
if (ctorID == -1)
ctorID = compiler.ProcessMethod(methodDef);
methodData.AddInstruction(ctorID);
methodData.AddInstruction(ctor.Parameters.Count);
}
public override void Process(Compiler compiler, MethodData methodData, Instruction instruction)
{
// Get destination
MethodReference destinationRef = instruction.Operand as MethodReference;
string methodName = Util.GetFriendlyMethodName(destinationRef);
// Check if it's a special method that should be caught here
if (methodName == "ILVM_Asm_Execute2")
{
// IL code at this point will look like this
// LOAD STRING "<assembly code>"
// LOAD REGS
// CALL ASM.EXECUTE
// So we must check if two instructions before this the assembly code is loaded
// else we need to throw an error
Instruction ldstr = instruction.Previous.Previous;
if (ldstr.OpCode != OpCodes.Ldstr)
{
throw new Exception("Assembly code needs to be directly in the call");
}
else
{
// Prepare assembler
string code = ldstr.Operand as string;
Assembler asm = compiler.Assembler;
int offset = asm.GetOffset();
// Since this is used as a "method" we need to place a return at the end
asm.HandleCode(code);
asm.HandleInstruction("ret");
int codeSize = asm.GetOffset() - offset;
// Write instruction followed by asm offset and asm size
methodData.AddInstruction(Ops.OP_RUNTIME_ASM);
methodData.AddInstruction(offset);
methodData.AddInstruction(codeSize);
}
return;
}
// If it's implemented in runtime, emit a special seperate instruction for this
if (compiler.IsRuntimeMethod(methodName))
{
// Write instruction followed by the runtime method ID
methodData.AddInstruction(Ops.OP_RUNTIME_CALL);
methodData.AddInstruction(compiler.GetRuntimeMethodID(methodName));
}
else
{
// Get definition from reference
MethodDefinition destination = destinationRef.Resolve();
// Lookup the method, if it isn't processed yet, process it
int methodId = compiler.GetMethodID(destination);
if (methodId == -1)
methodId = compiler.ProcessMethod(destination);
// If the method is not static, we pass "this" as argument, so we count 1 parameter extra
int paramCount = destinationRef.Parameters.Count;
if (!destination.IsStatic)
paramCount++;
// Write instruction followed by the method ID
methodData.AddInstruction(instruction.OpCode.Value);
methodData.AddInstruction(methodId);
methodData.AddInstruction(paramCount);
}
}