private static void CreatePrologueAndEpilogueBlocks(InstructionSet instructionSet, BasicBlocks basicBlocks)
{
// Create the prologue block
var context = instructionSet.CreateNewBlock(basicBlocks, BasicBlock.PrologueLabel);
// Add a jump instruction to the first block from the prologue
context.AppendInstruction(IRInstruction.Jmp);
context.SetBranch(0);
var prologue = context.BasicBlock;
basicBlocks.AddHeaderBlock(prologue);
// Create the epilogue block
context = instructionSet.CreateNewBlock(basicBlocks, BasicBlock.EpilogueLabel);
var epilogue = context.BasicBlock;
}
/// <summary>
/// Creates the ISR methods.
/// </summary>
private void CreateExceptionVector()
{
var type = TypeSystem.GetTypeByName("Mosa.Kernel.x86", "IDT");
if (type == null)
return;
var method = type.FindMethodByName("ExceptionHandlerType");
if (method == null)
return;
Operand exceptionMethod = Operand.CreateSymbolFromMethod(TypeSystem, method);
Operand esp = Operand.CreateCPURegister(TypeSystem.BuiltIn.I4, GeneralPurposeRegister.ESP);
BasicBlocks basicBlocks = new BasicBlocks();
InstructionSet instructionSet = new InstructionSet(25);
Context ctx = instructionSet.CreateNewBlock(basicBlocks);
basicBlocks.AddHeaderBlock(ctx.BasicBlock);
// TODO - setup stack for call to the managed exception handler
//1.
//2.
//3. Call the managed exception handler
ctx.AppendInstruction(X86.Call, null, exceptionMethod);
var vectorMethod = Compiler.CreateLinkerMethod("ExceptionVector");
Compiler.CompileMethod(vectorMethod, basicBlocks, instructionSet);
}
protected override void Run()
{
var typeInitializer = Compiler.Pipeline.FindFirst<TypeInitializerSchedulerStage>().TypeInitializerMethod;
var basicBlocks = new BasicBlocks();
var instructionSet = new InstructionSet(25);
var context = instructionSet.CreateNewBlock(basicBlocks);
basicBlocks.AddHeaderBlock(context.BasicBlock);
var entryPoint = Operand.CreateSymbolFromMethod(TypeSystem, typeInitializer);
context.AppendInstruction(IRInstruction.Call, null, entryPoint);
context.MosaMethod = typeInitializer;
var method = Compiler.CreateLinkerMethod(StartUpName);
Compiler.CompileMethod(method, basicBlocks, instructionSet);
Linker.EntryPoint = Linker.GetSymbol(method.FullName, SectionKind.Text);
}
/// <summary>
/// Creates the interrupt service routine (ISR) methods.
/// </summary>
private void CreateInterruptVectors()
{
var type = TypeSystem.GetTypeByName("Mosa.Kernel.x86", "IDT");
if (type == null)
return;
var method = type.FindMethodByName("ProcessInterrupt");
if (method == null)
return;
Operand interrupt = Operand.CreateSymbolFromMethod(TypeSystem, method);
Operand esp = Operand.CreateCPURegister(TypeSystem.BuiltIn.I4, GeneralPurposeRegister.ESP);
for (int i = 0; i <= 255; i++)
{
BasicBlocks basicBlocks = new BasicBlocks();
InstructionSet instructionSet = new InstructionSet(25);
Context ctx = instructionSet.CreateNewBlock(basicBlocks);
basicBlocks.AddHeaderBlock(ctx.BasicBlock);
ctx.AppendInstruction(X86.Cli);
if (i <= 7 || i >= 16 | i == 9) // For IRQ 8, 10, 11, 12, 13, 14 the cpu will automatically pushed the error code
ctx.AppendInstruction(X86.Push, null, Operand.CreateConstantUnsignedInt(TypeSystem, 0));
ctx.AppendInstruction(X86.Push, null, Operand.CreateConstantUnsignedInt(TypeSystem, (uint)i));
ctx.AppendInstruction(X86.Pushad);
ctx.AppendInstruction(X86.Call, null, interrupt);
ctx.AppendInstruction(X86.Popad);
ctx.AppendInstruction(X86.Add, esp, esp, Operand.CreateConstantUnsignedInt(TypeSystem, 8));
ctx.AppendInstruction(X86.Sti);
ctx.AppendInstruction(X86.IRetd);
var interruptMethod = Compiler.CreateLinkerMethod("InterruptISR" + i.ToString());
Compiler.CompileMethod(interruptMethod, basicBlocks, instructionSet);
}
}
protected override void Run()
{
if (multibootMethod == null)
{
multibootHeader = Linker.CreateSymbol(MultibootHeaderSymbolName, SectionKind.Text, 1, 0x30);
multibootMethod = Compiler.CreateLinkerMethod("MultibootInit");
Linker.EntryPoint = Linker.GetSymbol(multibootMethod.FullName, SectionKind.Text);
WriteMultibootHeader();
return;
}
var typeInitializerSchedulerStage = Compiler.Pipeline.FindFirst<TypeInitializerSchedulerStage>();
var ecx = Operand.CreateCPURegister(TypeSystem.BuiltIn.I4, GeneralPurposeRegister.ECX);
var eax = Operand.CreateCPURegister(TypeSystem.BuiltIn.I4, GeneralPurposeRegister.EAX);
var ebx = Operand.CreateCPURegister(TypeSystem.BuiltIn.I4, GeneralPurposeRegister.EBX);
var ebp = Operand.CreateCPURegister(TypeSystem.BuiltIn.I4, GeneralPurposeRegister.EBP);
var basicBlocks = new BasicBlocks();
var instructionSet = new InstructionSet(25);
var ctx = instructionSet.CreateNewBlock(basicBlocks);
basicBlocks.AddHeaderBlock(ctx.BasicBlock);
// set sentinal on the stack to indicate the start of the stack
var zero = Operand.CreateConstant(TypeSystem.BuiltIn.I4, 0);
ctx.AppendInstruction(X86.Mov, Operand.CreateMemoryAddress(TypeSystem.BuiltIn.I4, ebp, 0), zero);
// store multiboot registers eax and ebx at 0x200000 and 0x200004 respectively
ctx.AppendInstruction(X86.Mov, ecx, Operand.CreateConstantSignedInt(TypeSystem, 0x200000));
ctx.AppendInstruction(X86.Mov, Operand.CreateMemoryAddress(TypeSystem.BuiltIn.I4, ecx, 0), eax);
ctx.AppendInstruction(X86.Mov, Operand.CreateMemoryAddress(TypeSystem.BuiltIn.I4, ecx, 4), ebx);
// call type initializer
var entryPoint = Operand.CreateSymbolFromMethod(TypeSystem, typeInitializerSchedulerStage.TypeInitializerMethod);
ctx.AppendInstruction(X86.Call, null, entryPoint);
// should never get here
ctx.AppendInstruction(X86.Ret);
Compiler.CompileMethod(multibootMethod, basicBlocks, instructionSet);
}
protected override void Run()
{
if (multibootMethod == null)
{
multibootMethod = Compiler.CreateLinkerMethod("MultibootInit");
WriteMultibootHeader();
return;
}
var typeInitializerSchedulerStage = Compiler.Pipeline.FindFirst<TypeInitializerSchedulerStage>();
var ecx = Operand.CreateCPURegister(TypeSystem.BuiltIn.I4, GeneralPurposeRegister.ECX);
var eax = Operand.CreateCPURegister(TypeSystem.BuiltIn.I4, GeneralPurposeRegister.EAX);
var ebx = Operand.CreateCPURegister(TypeSystem.BuiltIn.I4, GeneralPurposeRegister.EBX);
var basicBlocks = new BasicBlocks();
var instructionSet = new InstructionSet(25);
var ctx = instructionSet.CreateNewBlock(basicBlocks);
basicBlocks.AddHeaderBlock(ctx.BasicBlock);
ctx.AppendInstruction(X86.Mov, ecx, Operand.CreateConstantSignedInt(TypeSystem, 0x200000));
ctx.AppendInstruction(X86.Mov, Operand.CreateMemoryAddress(TypeSystem.BuiltIn.I4, ecx, 0), eax);
ctx.AppendInstruction(X86.Mov, Operand.CreateMemoryAddress(TypeSystem.BuiltIn.I4, ecx, 4), ebx);
var entryPoint = Operand.CreateSymbolFromMethod(TypeSystem, typeInitializerSchedulerStage.TypeInitializerMethod);
ctx.AppendInstruction(X86.Call, null, entryPoint);
ctx.AppendInstruction(X86.Ret);
Compiler.CompileMethod(multibootMethod, basicBlocks, instructionSet);
Linker.EntryPoint = Linker.GetSymbol(multibootMethod.FullName);
}