/// <summary>
/// Initializes a new instance of the <see cref="TypeInitializerSchedulerStage"/> class.
/// </summary>
public TypeInitializerSchedulerStage()
{
basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock(BasicBlock.PrologueLabel);
basicBlocks.AddHeaderBlock(block);
context = new Context(block);
}
/// <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);
}
/// <summary>
/// Initializes a new instance of the <see cref="TypeInitializerSchedulerStage"/> class.
/// </summary>
public TypeInitializerSchedulerStage()
{
basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock(BasicBlock.PrologueLabel);
basicBlocks.AddHeaderBlock(block);
context = new Context(block);
}
/// <summary>
/// Initializes a new instance of the <see cref="TypeInitializerSchedulerStage"/> class.
/// </summary>
public TypeInitializerSchedulerStage()
{
basicBlocks = new BasicBlocks();
instructionSet = new InstructionSet(25);
context = instructionSet.CreateNewBlock(basicBlocks);
basicBlocks.AddHeaderBlock(context.BasicBlock);
context.AppendInstruction(IRInstruction.Prologue);
}
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();
Linker.CreateSymbol(MultibootEAX, SectionKind.BSS, Architecture.NativeAlignment, Architecture.NativePointerSize);
Linker.CreateSymbol(MultibootEBX, SectionKind.BSS, Architecture.NativeAlignment, Architecture.NativePointerSize);
return;
}
var typeInitializerSchedulerStage = Compiler.PostCompilePipeline.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 multibootEax = Operand.CreateUnmanagedSymbolPointer(TypeSystem, MultibootEAX);
var multibootEbx = Operand.CreateUnmanagedSymbolPointer(TypeSystem, MultibootEBX);
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var ctx = new Context(block);
// set sentinel 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);
ctx.AppendInstruction(X86.Mov, ecx, multibootEax);
ctx.AppendInstruction(X86.Mov, Operand.CreateMemoryAddress(TypeSystem.BuiltIn.I4, ecx, 0), eax);
ctx.AppendInstruction(X86.Mov, ecx, multibootEbx);
ctx.AppendInstruction(X86.Mov, Operand.CreateMemoryAddress(TypeSystem.BuiltIn.I4, ecx, 0), 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, 0);
}
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 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++)
{
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var ctx = new Context(block);
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.CreateConstant(TypeSystem, 0));
}
ctx.AppendInstruction(X86.Push, null, Operand.CreateConstant(TypeSystem, i));
ctx.AppendInstruction(X86.Pushad);
ctx.AppendInstruction(X86.Push, null, esp);
ctx.AppendInstruction(X86.Call, null, interrupt);
ctx.AppendInstruction(X86.Pop, esp);
ctx.AppendInstruction(X86.Popad);
ctx.AppendInstruction(X86.Add, esp, esp, Operand.CreateConstant(TypeSystem, 8));
ctx.AppendInstruction(X86.Sti);
ctx.AppendInstruction(X86.IRetd);
var interruptMethod = Compiler.CreateLinkerMethod("InterruptISR" + i.ToString());
Compiler.CompileMethod(interruptMethod, basicBlocks, 0);
}
}
protected override void Run()
{
Debug.Assert(setupMethod == null, "SSE setup method already generated!");
setupMethod = Compiler.CreateLinkerMethod("SSEInit");
var eax = Operand.CreateCPURegister(TypeSystem.BuiltIn.U4, GeneralPurposeRegister.EAX);
var cr0 = Operand.CreateCPURegister(TypeSystem.BuiltIn.U4, ControlRegister.CR0);
var cr4 = Operand.CreateCPURegister(TypeSystem.BuiltIn.U4, ControlRegister.CR4);
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var ctx = new Context(block);
/*
* ;enable SSE and the like
* mov eax, cr0
* and ax, 0xFFFB ;clear coprocessor emulation CR0.EM
* or ax, 0x2 ;set coprocessor monitoring CR0.MP
* mov cr0, eax
* mov eax, cr4
* or ax, 3 << 9 ;set CR4.OSFXSR and CR4.OSXMMEXCPT at the same time
* mov cr4, eax
* ret
*/
ctx.AppendInstruction(X86.MovCR, eax, cr0);
ctx.AppendInstruction(X86.And, eax, eax, Operand.CreateConstant(TypeSystem.BuiltIn.U4, 0xFFFB));
ctx.AppendInstruction(X86.Or, eax, eax, Operand.CreateConstant(TypeSystem.BuiltIn.U4, 0x2));
ctx.AppendInstruction(X86.MovCR, cr0, eax);
ctx.AppendInstruction(X86.MovCR, eax, cr4);
ctx.AppendInstruction(X86.Or, eax, eax, Operand.CreateConstant(TypeSystem.BuiltIn.U4, 0x600));
ctx.AppendInstruction(X86.MovCR, cr4, eax);
ctx.AppendInstruction(X86.Ret);
Compiler.CompileMethod(setupMethod, basicBlocks, 0);
var typeInitializerSchedulerStage = Compiler.PostCompilePipeline.FindFirst <TypeInitializerSchedulerStage>();
typeInitializerSchedulerStage.Schedule(setupMethod);
}
private static BasicBlocks CreateBasicBlockInstructionSet()
{
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var context = new Context(block);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
return basicBlocks;
}
private static BasicBlocks CreateBasicBlockInstructionSet()
{
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var context = new Context(block);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
context.AppendInstruction(IRInstruction.Nop);
return(basicBlocks);
}
protected override void Run()
{
var typeInitializer = Compiler.PostCompilePipeline.FindFirst<TypeInitializerSchedulerStage>().TypeInitializerMethod;
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var context = new Context(block);
var entryPoint = Operand.CreateSymbolFromMethod(TypeSystem, typeInitializer);
context.AppendInstruction(IRInstruction.Call, null, entryPoint);
context.InvokeMethod = typeInitializer;
var method = Compiler.CreateLinkerMethod(StartUpName);
Compiler.CompileMethod(method, basicBlocks, 0);
Linker.EntryPoint = Linker.GetSymbol(method.FullName, SectionKind.Text);
}
protected override void Run()
{
Debug.Assert(setupMethod == null, "SSE setup method already generated!");
setupMethod = Compiler.CreateLinkerMethod("SSEInit");
var eax = Operand.CreateCPURegister(TypeSystem.BuiltIn.U4, GeneralPurposeRegister.EAX);
var cr0 = Operand.CreateCPURegister(TypeSystem.BuiltIn.U4, ControlRegister.CR0);
var cr4 = Operand.CreateCPURegister(TypeSystem.BuiltIn.U4, ControlRegister.CR4);
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var ctx = new Context(block);
/*
;enable SSE and the like
mov eax, cr0
and ax, 0xFFFB ;clear coprocessor emulation CR0.EM
or ax, 0x2 ;set coprocessor monitoring CR0.MP
mov cr0, eax
mov eax, cr4
or ax, 3 << 9 ;set CR4.OSFXSR and CR4.OSXMMEXCPT at the same time
mov cr4, eax
ret
*/
ctx.AppendInstruction(X86.MovCR, eax, cr0);
ctx.AppendInstruction(X86.And, eax, eax, Operand.CreateConstant(TypeSystem.BuiltIn.U4, 0xFFFB));
ctx.AppendInstruction(X86.Or, eax, eax, Operand.CreateConstant(TypeSystem.BuiltIn.U4, 0x2));
ctx.AppendInstruction(X86.MovCR, cr0, eax);
ctx.AppendInstruction(X86.MovCR, eax, cr4);
ctx.AppendInstruction(X86.Or, eax, eax, Operand.CreateConstant(TypeSystem.BuiltIn.U4, 0x600));
ctx.AppendInstruction(X86.MovCR, cr4, eax);
ctx.AppendInstruction(X86.Ret);
Compiler.CompileMethod(setupMethod, basicBlocks, 0);
var typeInitializerSchedulerStage = Compiler.PostCompilePipeline.FindFirst<TypeInitializerSchedulerStage>();
typeInitializerSchedulerStage.Schedule(setupMethod);
}
protected override void Run()
{
TypeInitializerSchedulerStage typeInitializerSchedulerStage = Compiler.Pipeline.FindFirst<TypeInitializerSchedulerStage>();
BasicBlocks basicBlocks = new BasicBlocks();
InstructionSet instructionSet = new InstructionSet(25);
Context context = instructionSet.CreateNewBlock(basicBlocks);
basicBlocks.AddHeaderBlock(context.BasicBlock);
Operand entryPoint = Operand.CreateSymbolFromMethod(TypeSystem, typeInitializerSchedulerStage.TypeInitializerMethod);
context.AppendInstruction(IRInstruction.Call, null, entryPoint);
context.MosaMethod = typeInitializerSchedulerStage.TypeInitializerMethod;
//context.AppendInstruction(IRInstruction.Break);
MosaMethod method = Compiler.CreateLinkerMethod(StartUpName);
Compiler.CompileMethod(method, basicBlocks, instructionSet);
Linker.EntryPoint = Linker.GetSymbol(method.FullName);
}
protected override void Run()
{
var typeInitializer = Compiler.PostCompilePipeline.FindFirst <TypeInitializerSchedulerStage>().TypeInitializerMethod;
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var context = new Context(block);
var entryPoint = Operand.CreateSymbolFromMethod(TypeSystem, typeInitializer);
context.AppendInstruction(IRInstruction.Call, null, entryPoint);
context.InvokeMethod = typeInitializer;
var method = Compiler.CreateLinkerMethod(StartUpName);
Compiler.CompileMethod(method, basicBlocks, 0);
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++)
{
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var ctx = new Context(block);
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.CreateConstant(TypeSystem, 0));
ctx.AppendInstruction(X86.Push, null, Operand.CreateConstant(TypeSystem, i));
ctx.AppendInstruction(X86.Pushad);
ctx.AppendInstruction(X86.Push, null, esp);
ctx.AppendInstruction(X86.Call, null, interrupt);
ctx.AppendInstruction(X86.Pop, esp);
ctx.AppendInstruction(X86.Popad);
ctx.AppendInstruction(X86.Add, esp, esp, Operand.CreateConstant(TypeSystem, 8));
ctx.AppendInstruction(X86.Sti);
ctx.AppendInstruction(X86.IRetd);
var interruptMethod = Compiler.CreateLinkerMethod("InterruptISR" + i.ToString());
Compiler.CompileMethod(interruptMethod, basicBlocks, 0);
}
}
private void DecodeProtectedRegionTargets()
{
foreach (var handler in MethodCompiler.Method.ExceptionHandlers)
{
if (handler.TryStart != 0)
{
var block = GetBlockByLabel(handler.TryStart);
}
if (handler.TryEnd != 0)
{
var block = GetBlockByLabel(handler.TryEnd);
}
if (handler.HandlerStart != 0)
{
var block = GetBlockByLabel(handler.HandlerStart);
BasicBlocks.AddHeaderBlock(block);
}
if (handler.FilterOffset != null)
{
var block = GetBlockByLabel(handler.FilterOffset.Value);
BasicBlocks.AddHeaderBlock(block);
}
}
}
private static void CreatePrologueAndEpilogueBlocks(InstructionSet instructionSet, BasicBlocks basicBlocks)
{
// Create the prologue block
Context context = new Context(instructionSet);
// Add a jump instruction to the first block from the prologue
context.AppendInstruction(IRInstruction.Jmp);
context.SetBranch(0);
context.Label = BasicBlock.PrologueLabel;
var prologue = basicBlocks.CreateBlock(BasicBlock.PrologueLabel, context.Index);
basicBlocks.AddHeaderBlock(prologue);
// Create the epilogue block
context = new Context(instructionSet);
// Add null instruction, necessary to generate a block index
context.AppendInstruction(null);
context.Label = BasicBlock.EpilogueLabel;
var epilogue = basicBlocks.CreateBlock(BasicBlock.EpilogueLabel, context.Index);
}
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);
}
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()
{
// No CIL decoding if this is a linker generated method
if (MethodCompiler.Method.IsLinkerGenerated)
{
return;
}
var plugMethod = MethodCompiler.Compiler.PlugSystem.GetPlugMethod(MethodCompiler.Method);
if (plugMethod != null)
{
var plugSymbol = Operand.CreateSymbolFromMethod(TypeSystem, plugMethod);
var context = CreateNewBlockContext(-1);
context.AppendInstruction(IRInstruction.Jmp, null, plugSymbol);
BasicBlocks.AddHeaderBlock(context.Block);
return;
}
if (MethodCompiler.Method.Code.Count == 0)
{
if (DelegatePatcher.PatchDelegate(MethodCompiler))
{
return;
}
MethodCompiler.Stop();
return;
}
MethodCompiler.SetLocalVariables(MethodCompiler.Method.LocalVariables);
// Create the prologue block
var prologue = CreateNewBlock(BasicBlock.PrologueLabel);
BasicBlocks.AddHeaderBlock(prologue);
var jmpNode = new InstructionNode();
jmpNode.Label = BasicBlock.PrologueLabel;
jmpNode.Block = prologue;
prologue.First.Insert(jmpNode);
// Create starting block
var startBlock = CreateNewBlock(0);
jmpNode.SetInstruction(IRInstruction.Jmp, startBlock);
DecodeInstructionTargets();
DecodeProtectedRegionTargets();
/* Decode the instructions */
DecodeInstructions();
foreach (var block in BasicBlocks)
{
if (!block.HasPreviousBlocks && !BasicBlocks.HeadBlocks.Contains(block))
{
// block was targeted (probably by an leave instruction within a protected region)
BasicBlocks.AddHeaderBlock(block);
}
}
// This makes it easier to review --- it's not necessary
BasicBlocks.OrderByLabel();
}
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();
Linker.CreateSymbol(MultibootEAX, SectionKind.BSS, Architecture.NativeAlignment, Architecture.NativePointerSize);
Linker.CreateSymbol(MultibootEBX, SectionKind.BSS, Architecture.NativeAlignment, Architecture.NativePointerSize);
return;
}
var typeInitializerSchedulerStage = Compiler.PostCompilePipeline.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 multibootEax = Operand.CreateUnmanagedSymbolPointer(TypeSystem, MultibootEAX);
var multibootEbx = Operand.CreateUnmanagedSymbolPointer(TypeSystem, MultibootEBX);
var basicBlocks = new BasicBlocks();
var block = basicBlocks.CreateBlock();
basicBlocks.AddHeaderBlock(block);
var ctx = new Context(block);
// set sentinel 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);
ctx.AppendInstruction(X86.Mov, ecx, multibootEax);
ctx.AppendInstruction(X86.Mov, Operand.CreateMemoryAddress(TypeSystem.BuiltIn.I4, ecx, 0), eax);
ctx.AppendInstruction(X86.Mov, ecx, multibootEbx);
ctx.AppendInstruction(X86.Mov, Operand.CreateMemoryAddress(TypeSystem.BuiltIn.I4, ecx, 0), 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, 0);
}