public override void AssembleNew(Assembler aAssembler, object aMethodInfo)
{
XS.DisableInterrupts();
// bochs magic break
//Exchange(BX, BX);
XS.Halt();
}
protected static void DoNullReferenceCheck(Assembler.Assembler assembler, bool debugEnabled, int stackOffsetToCheck)
{
if (stackOffsetToCheck != SignedAlign(stackOffsetToCheck, 4))
{
throw new Exception("Stack offset not aligned!");
}
if (debugEnabled)
{
if (!CompilerEngine.UseGen3Kernel)
{
XS.Compare(XSRegisters.ESP, 0, destinationDisplacement: (int)stackOffsetToCheck);
XS.Jump(CPU.ConditionalTestEnum.NotEqual, ".AfterNullCheck");
XS.ClearInterruptFlag();
// don't remove the call. It seems pointless, but we need it to retrieve the EIP value
XS.Call(".NullCheck_GetCurrAddress");
XS.Label(".NullCheck_GetCurrAddress");
XS.Pop(XSRegisters.EAX);
new CPU.Mov
{
DestinationRef = ElementReference.New("DebugStub_CallerEIP"),
DestinationIsIndirect = true,
SourceReg = CPU.RegistersEnum.EAX
};
XS.Call("DebugStub_SendNullReferenceOccurred");
}
XS.Halt();
XS.Label(".AfterNullCheck");
}
}
protected static void DoNullReferenceCheck(Assembler assembler, bool debugEnabled, int stackOffsetToCheck)
{
if (stackOffsetToCheck != SignedAlign(stackOffsetToCheck, 4))
{
throw new Exception("Stack offset not aligned!");
}
if (debugEnabled)
{
//if (!CompilerEngine.UseGen3Kernel) {
XS.Compare(XSRegisters.ESP, 0, destinationDisplacement: (int)stackOffsetToCheck);
XS.Jump(CPU.ConditionalTestEnum.NotEqual, ".AfterNullCheck");
XS.ClearInterruptFlag();
// don't remove the call. It seems pointless, but we need it to retrieve the EIP value
XS.Call(".NullCheck_GetCurrAddress");
XS.Label(".NullCheck_GetCurrAddress");
XS.Pop(XSRegisters.EAX);
XS.Set(AsmMarker.Labels[AsmMarker.Type.DebugStub_CallerEIP], XSRegisters.EAX, destinationIsIndirect: true);
XS.Call(AsmMarker.Labels[AsmMarker.Type.DebugStub_SendNullRefEvent]);
//}
XS.Halt();
XS.Label(".AfterNullCheck");
}
}
public override void AssembleNew(Cosmos.Assembler.Assembler aAssembler, object aMethodInfo)
{
new CPUx86.ClrInterruptFlag();
/* Clear all keyboard buffers (output and command buffers) */
new CPUAll.Label(".waitBuffer");
XS.Mov(XSRegisters.DX, 0x64);
XS.InFromDX(XSRegisters.AL);
XS.Test(XSRegisters.AL, 2);
XS.Jump(ConditionalTestEnum.NotEqual, ".waitBuffer");
XS.Mov(XSRegisters.AL, 0xD1);
XS.Mov(XSRegisters.DX, 0x64);
XS.OutToDX(XSRegisters.AL);
new CPUAll.Label(".clearBuffer");
XS.Mov(XSRegisters.DX, 0x64);
XS.InFromDX(XSRegisters.AL);
XS.Test(XSRegisters.AL, 2);
XS.Jump(ConditionalTestEnum.NotEqual, ".clearBuffer");
XS.Mov(XSRegisters.AL, 0xFE);
XS.Mov(XSRegisters.DX, 0x60);
XS.OutToDX(XSRegisters.AL);
new CPUAll.Label(".loop");//failed... halt
XS.Halt();
XS.Jump(".loop");
}
public void Initialize()
{
uint xSig = 0x1BADB002;
DataMembers.Add(new DataIfNotDefined("ELF_COMPILATION"));
DataMembers.Add(new DataMember("MultibootSignature", new uint[]
{
xSig
}));
uint xFlags = 0x10007;
DataMembers.Add(new DataMember("MultibootFlags", xFlags));
DataMembers.Add(new DataMember("MultibootChecksum", (int)(0 - (xFlags + xSig))));
DataMembers.Add(new DataMember("MultibootHeaderAddr", ElementReference.New("MultibootSignature")));
DataMembers.Add(new DataMember("MultibootLoadAddr", ElementReference.New("MultibootSignature")));
DataMembers.Add(new DataMember("MultibootLoadEndAddr", ElementReference.New("_end_code")));
DataMembers.Add(new DataMember("MultibootBSSEndAddr", ElementReference.New("_end_code")));
DataMembers.Add(new DataMember("MultibootEntryAddr", ElementReference.New("Kernel_Start")));
DataMembers.Add(new DataMember("", 0));
DataMembers.Add(new DataMember("", 800, 600, 32));
DataMembers.Add(new DataEndIfDefined());
DataMembers.Add(new DataIfDefined("ELF_COMPILATION"));
xFlags = 0x00007;
DataMembers.Add(new DataMember("MultibootSignature", new uint[]
{
xSig
}));
DataMembers.Add(new DataMember("MultibootFlags", xFlags));
DataMembers.Add(new DataMember("MultibootChecksum", (int)(0 - (xFlags + xSig))));
DataMembers.Add(new DataMember("", 0, 0, 0, 0, 0));
DataMembers.Add(new DataMember("", 0));
DataMembers.Add(new DataMember("", 800, 600, 32));
DataMembers.Add(new DataEndIfDefined());
//graphics info fields
DataMembers.Add(new DataMember("MultibootGraphicsRuntime_VbeModeInfoAddr", 1 << 2));
DataMembers.Add(new DataMember("MultibootGraphicsRuntime_VbeControlInfoAddr", 1 << 0));
DataMembers.Add(new DataMember("MultibootGraphicsRuntime_VbeMode", 0));
// memory
DataMembers.Add(new DataMember("MultiBootInfo_Memory_High", 0));
DataMembers.Add(new DataMember("MultiBootInfo_Memory_Low", 0));
DataMembers.Add(new DataMember("Before_Kernel_Stack", new byte[0x50000]));
DataMembers.Add(new DataMember("Kernel_Stack", new byte[0]));
DataMembers.Add(new DataMember("MultiBootInfo_Structure", new uint[1]));
// constants
DataMembers.Add(new DataMember(@"__uint2double_const", new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x41 }));
DataMembers.Add(new DataMember(@"__ulong2double_const", 0x5F800000));
DataMembers.Add(new DataMember(@"__doublesignbit", 0x8000000000000000));
DataMembers.Add(new DataMember(@"__floatsignbit", 0x80000000));
if (mComPort > 0)
{
new Define("DEBUGSTUB");
}
// This is our first entry point. Multiboot uses this as Cosmos entry point.
new Label("Kernel_Start", isGlobal: true);
XS.Set(XSRegisters.ESP, "Kernel_Stack");
// Displays "Cosmos" in top left. Used to make sure Cosmos is booted in case of hang.
// ie bootloader debugging. This must be the FIRST code, even before setup so we know
// we are being called properly by the bootloader and that if there are problems its
// somwhere in our code, not the bootloader.
WriteDebugVideo("Cosmos pre boot");
// For when using Bochs, causes a break ASAP on entry after initial Cosmos display.
//new LiteralAssemblerCode("xchg bx, bx");
// CLI ASAP
WriteDebugVideo("Clearing interrupts.");
XS.ClearInterruptFlag();
WriteDebugVideo("Begin multiboot info.");
new LiteralAssemblerCode("%ifndef EXCLUDE_MULTIBOOT_MAGIC");
new Comment(this, "MultiBoot compliant loader provides info in registers: ");
new Comment(this, "EBX=multiboot_info ");
new Comment(this, "EAX=0x2BADB002 - check if it's really Multiboot-compliant loader ");
new Comment(this, " ;- copy mb info - some stuff for you ");
new Comment(this, "BEGIN - Multiboot Info");
new Mov
{
DestinationRef = ElementReference.New("MultiBootInfo_Structure"),
DestinationIsIndirect = true,
SourceReg = RegistersEnum.EBX
};
XS.Add(XSRegisters.EBX, 4);
XS.Set(XSRegisters.EAX, XSRegisters.EBX, sourceIsIndirect: true);
new Mov
{
DestinationRef = ElementReference.New("MultiBootInfo_Memory_Low"),
DestinationIsIndirect = true,
SourceReg = RegistersEnum.EAX
};
XS.Add(XSRegisters.EBX, 4);
XS.Set(XSRegisters.EAX, XSRegisters.EBX, sourceIsIndirect: true);
new Mov
{
DestinationRef = ElementReference.New("MultiBootInfo_Memory_High"),
DestinationIsIndirect = true,
SourceReg = RegistersEnum.EAX
};
new Comment(this, "END - Multiboot Info");
new LiteralAssemblerCode("%endif");
WriteDebugVideo("Creating GDT.");
CreateGDT();
WriteDebugVideo("Configuring PIC");
ConfigurePIC();
WriteDebugVideo("Creating IDT.");
CreateIDT();
new Comment("Set graphics fields");
new Mov {
DestinationReg = XSRegisters.EBX, SourceRef = ElementReference.New("MultiBootInfo_Structure"), SourceIsIndirect = true
};
new Mov {
DestinationReg = XSRegisters.EAX, SourceReg = XSRegisters.EBX, SourceIsIndirect = true, SourceDisplacement = 72
};
new Mov {
DestinationRef = ElementReference.New("MultibootGraphicsRuntime_VbeControlInfoAddr"), DestinationIsIndirect = true, SourceReg = XSRegisters.EAX
};
new Mov {
DestinationReg = XSRegisters.EAX, SourceReg = XSRegisters.EBX, SourceIsIndirect = true, SourceDisplacement = 76
};
new Mov {
DestinationRef = ElementReference.New("MultibootGraphicsRuntime_VbeModeInfoAddr"), DestinationIsIndirect = true, SourceReg = XSRegisters.EAX
};
new Mov {
DestinationReg = XSRegisters.EAX, SourceReg = XSRegisters.EBX, SourceIsIndirect = true, SourceDisplacement = 80
};
new Mov {
DestinationRef = ElementReference.New("MultibootGraphicsRuntime_VbeMode"), DestinationIsIndirect = true, SourceReg = XSRegisters.EAX
};
//WriteDebugVideo("Initializing SSE.");
//new Comment(this, "BEGIN - SSE Init");
//// CR4[bit 9]=1, CR4[bit 10]=1, CR0[bit 2]=0, CR0[bit 1]=1
//XS.Mov(XSRegisters.EAX, XSRegisters.Registers.CR4);
//XS.Or(XSRegisters.EAX, 0x100);
//XS.Mov(XSRegisters.CR4, XSRegisters.Registers.EAX);
//XS.Mov(XSRegisters.EAX, XSRegisters.Registers.CR4);
//XS.Or(XSRegisters.EAX, 0x200);
//XS.Mov(XSRegisters.CR4, XSRegisters.Registers.EAX);
//XS.Mov(XSRegisters.EAX, XSRegisters.Registers.CR0);
//XS.And(XSRegisters.EAX, 0xfffffffd);
//XS.Mov(XSRegisters.CR0, XSRegisters.Registers.EAX);
//XS.Mov(XSRegisters.EAX, XSRegisters.Registers.CR0);
//XS.And(XSRegisters.EAX, 1);
//XS.Mov(XSRegisters.CR0, XSRegisters.Registers.EAX);
//new Comment(this, "END - SSE Init");
if (mComPort > 0)
{
WriteDebugVideo("Initializing DebugStub.");
XS.Call(AsmMarker.Labels[AsmMarker.Type.DebugStub_Init]);
}
// Jump to Kernel entry point
WriteDebugVideo("Jumping to kernel.");
XS.Call(EntryPointName);
new Comment(this, "Kernel done - loop till next IRQ");
XS.Label(".loop");
XS.ClearInterruptFlag();
XS.Halt();
XS.Jump(".loop");
if (mComPort > 0)
{
var xGen = new AsmGenerator();
var xGenerateAssembler =
new Action <object>(i =>
{
if (i is StreamReader)
{
var xAsm = xGen.Generate((StreamReader)i);
CurrentInstance.Instructions.AddRange(xAsm.Instructions);
CurrentInstance.DataMembers.AddRange(xAsm.DataMembers);
}
else if (i is string)
{
var xAsm = xGen.Generate((string)i);
CurrentInstance.Instructions.AddRange(xAsm.Instructions);
CurrentInstance.DataMembers.AddRange(xAsm.DataMembers);
}
else
{
throw new Exception("Object type '" + i.ToString() + "' not supported!");
}
});
if (ReadDebugStubFromDisk)
{
foreach (var xFile in Directory.GetFiles(CosmosPaths.DebugStubSrc, "*.xs"))
{
xGenerateAssembler(xFile);
}
}
else
{
foreach (var xManifestName in typeof(ReferenceHelper).Assembly.GetManifestResourceNames())
{
if (!xManifestName.EndsWith(".xs", StringComparison.OrdinalIgnoreCase))
{
continue;
}
using (var xStream = typeof(ReferenceHelper).Assembly.GetManifestResourceStream(xManifestName))
{
using (var xReader = new StreamReader(xStream))
{
xGenerateAssembler(xReader);
}
}
}
}
OnAfterEmitDebugStub();
}
else
{
XS.Label(AsmMarker.Labels[AsmMarker.Type.DebugStub_Step]);
XS.Return();
}
// Start emitting assembly labels
CurrentInstance.EmitAsmLabels = true;
}
public override void AssembleNew(Cosmos.Assembler.Assembler aAssembler, object aMethodInfo)
{
XS.Halt();
}
public void Initialize(bool enableVBE, string VBEResolution)
{
uint xSig = 0xe85250d6;
//Multiboot header
DataMembers.Add(new DataMember("align", "8", true));
DataMembers.Add(new DataMember("MultibootHeader", Array.Empty <byte>()));
DataMembers.Add(new DataMember("MultibootSignature", new uint[] { xSig }));
DataMembers.Add(new DataMember("MultibootArchitecture", 0));
DataMembers.Add(new DataMember("MultibootLenght", "MultibootHeaderEnd - MultibootHeader", typeof(uint)));
DataMembers.Add(new DataMember("MultibootChecksum", "0x100000000 - (0xe85250d6 + 0 + (MultibootHeaderEnd - MultibootHeader))", typeof(uint)));
if (enableVBE)
{
try
{
string[] res = VBEResolution.Split('x');
//Framebuffer Tag
DataMembers.Add(new DataMember("align", "8", true));
DataMembers.Add(new DataMember("MultibootFramebufferTag", Array.Empty <byte>()));
DataMembers.Add(new DataMember("MultibootFramebufferType", (ushort)5));
DataMembers.Add(new DataMember("MultibootFramebufferOptional", (ushort)1));
DataMembers.Add(new DataMember("MultibootFramebufferLenght", "MultibootFramebufferTagEnd - MultibootFramebufferTag", typeof(uint)));
DataMembers.Add(new DataMember("", int.Parse(res[0])));
DataMembers.Add(new DataMember("", int.Parse(res[1])));
DataMembers.Add(new DataMember("", int.Parse(res[2])));
DataMembers.Add(new DataMember("MultibootFramebufferTagEnd", Array.Empty <byte>()));
}
catch
{
Console.WriteLine("VBE Resolution must be this format: 1920x1080x32");
}
}
// memory
DataMembers.Add(new DataMember("align", "8", true));
DataMembers.Add(new DataMember("MultibootMemoryTag", Array.Empty <byte>()));
DataMembers.Add(new DataMember("MultibootMemoryTagType", (ushort)2));
DataMembers.Add(new DataMember("MultibootMemoryTagOptional", (ushort)1));
DataMembers.Add(new DataMember("MultibootMemoryTagLenght", "MultibootMemoryTagEnd - MultibootMemoryTag", typeof(uint)));
DataMembers.Add(new DataMember("MultibootHeaderAddr", ElementReference.New("MultibootSignature")));
DataMembers.Add(new DataMember("MultibootLoadAddr", ElementReference.New("MultibootSignature")));
DataMembers.Add(new DataMember("MultibootLoadEndAddr", ElementReference.New("_end_code")));
DataMembers.Add(new DataMember("MultibootBSSEndAddr", ElementReference.New("_end_code")));
DataMembers.Add(new DataMember("MultibootMemoryTagEnd", Array.Empty <byte>()));
//Entry Address
DataMembers.Add(new DataMember("align", "8", true));
DataMembers.Add(new DataMember("MultibootEntryTag", Array.Empty <byte>()));
DataMembers.Add(new DataMember("MultibootEntryTagType", (ushort)3));
DataMembers.Add(new DataMember("MultibootEntryTagOptional", (ushort)1));
DataMembers.Add(new DataMember("MultibootEntryTagLenght", "MultibootEntryTagEnd - MultibootEntryTag", typeof(uint)));
DataMembers.Add(new DataMember("MultibootEntryAddr", ElementReference.New("Kernel_Start")));
DataMembers.Add(new DataMember("MultibootEntryTagEnd", Array.Empty <byte>()));
//End Tag
DataMembers.Add(new DataMember("align", "8", true));
DataMembers.Add(new DataMember("MultibootEndTag", Array.Empty <byte>()));
DataMembers.Add(new DataMember("MultibootEndTagType", (ushort)0));
DataMembers.Add(new DataMember("MultibootEndTagOptional", (ushort)0));
DataMembers.Add(new DataMember("MultibootEndTagEnd", Array.Empty <byte>()));
DataMembers.Add(new DataMember("MultibootHeaderEnd", Array.Empty <byte>()));
//memory
DataMembers.Add(new DataMember("align", "16", true));
DataMembers.Add(new DataMember("Before_Kernel_Stack", new byte[0x50000]));
DataMembers.Add(new DataMember("align", "16", true));
DataMembers.Add(new DataMember("Kernel_Stack", Array.Empty <byte>()));
DataMembers.Add(new DataMember("MultiBootInfo_Structure", new uint[1]));
// constants
DataMembers.Add(new DataMember("align", "16", true));
DataMembers.Add(new DataMember(@"__uint2double_const", new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x41 }));
DataMembers.Add(new DataMember("align", "16", true));
DataMembers.Add(new DataMember(@"__ulong2double_const", 0x5F800000));
DataMembers.Add(new DataMember("align", "16", true));
DataMembers.Add(new DataMember(@"__doublesignbit", 0x8000000000000000));
DataMembers.Add(new DataMember("align", "16", true));
DataMembers.Add(new DataMember(@"__floatsignbit", 0x80000000));
if (mComPort > 0)
{
new Define("DEBUGSTUB");
}
// This is our first entry point. Multiboot uses this as Cosmos entry point.
new Label("Kernel_Start", isGlobal: true);
XS.Set(ESP, "Kernel_Stack");
// Displays "Cosmos" in top left. Used to make sure Cosmos is booted in case of hang.
// ie bootloader debugging. This must be the FIRST code, even before setup so we know
// we are being called properly by the bootloader and that if there are problems its
// somwhere in our code, not the bootloader.
WriteDebugVideo("Cosmos pre boot");
// For when using Bochs, causes a break ASAP on entry after initial Cosmos display.
//new LiteralAssemblerCode("xchg bx, bx");
// CLI ASAP
WriteDebugVideo("Clearing interrupts.");
XS.ClearInterruptFlag();
WriteDebugVideo("Begin multiboot info.");
new LiteralAssemblerCode("%ifndef EXCLUDE_MULTIBOOT_MAGIC");
new Comment(this, "MultiBoot compliant loader provides info in registers: ");
new Comment(this, "EBX=multiboot_info ");
new Comment(this, "EAX=0x36d76289 - check if it's really Multiboot2-compliant loader ");
new Comment(this, " ;- copy mb info - some stuff for you ");
new Comment(this, "BEGIN - Multiboot Info");
new Mov
{
DestinationRef = ElementReference.New("MultiBootInfo_Structure"),
DestinationIsIndirect = true,
SourceReg = RegistersEnum.EBX
};
XS.Call("SystemVoidCosmosCoreMultiboot2Init");
new Comment(this, "END - Multiboot Info");
new LiteralAssemblerCode("%endif");
WriteDebugVideo("Creating GDT.");
CreateGDT();
WriteDebugVideo("Configuring PIC");
ConfigurePIC();
WriteDebugVideo("Creating IDT.");
CreateIDT();
//WriteDebugVideo("Initializing SSE.");
//new Comment(this, "BEGIN - SSE Init");
//// CR4[bit 9]=1, CR4[bit 10]=1, CR0[bit 2]=0, CR0[bit 1]=1
//XS.Mov(XSRegisters.EAX, XSRegisters.Registers.CR4);
//XS.Or(XSRegisters.EAX, 0x100);
//XS.Mov(XSRegisters.CR4, XSRegisters.Registers.EAX);
//XS.Mov(XSRegisters.EAX, XSRegisters.Registers.CR4);
//XS.Or(XSRegisters.EAX, 0x200);
//XS.Mov(XSRegisters.CR4, XSRegisters.Registers.EAX);
//XS.Mov(XSRegisters.EAX, XSRegisters.Registers.CR0);
//XS.And(XSRegisters.EAX, 0xfffffffd);
//XS.Mov(XSRegisters.CR0, XSRegisters.Registers.EAX);
//XS.Mov(XSRegisters.EAX, XSRegisters.Registers.CR0);
//XS.And(XSRegisters.EAX, 1);
//XS.Mov(XSRegisters.CR0, XSRegisters.Registers.EAX);
//new Comment(this, "END - SSE Init");
if (mComPort > 0)
{
WriteDebugVideo("Initializing DebugStub.");
XS.Call(AsmMarker.Labels[AsmMarker.Type.DebugStub_Init]);
}
//Initiate Memory
WriteDebugVideo("Initiating Memory");
XS.Call(LabelName.Get(GCImplementationRefs.InitRef));
// Jump to Kernel entry point
WriteDebugVideo("Jumping to kernel.");
XS.Call(EntryPointName);
new Comment(this, "Kernel done - loop till next IRQ");
XS.Label(".loop");
XS.ClearInterruptFlag();
XS.Halt();
XS.Jump(".loop");
if (mComPort > 0)
{
var xGen = new AsmGenerator();
void GenerateAssembler(Assembler assembler)
{
CurrentInstance.Instructions.AddRange(assembler.Instructions);
CurrentInstance.DataMembers.AddRange(assembler.DataMembers);
}
if (ReadDebugStubFromDisk)
{
foreach (var xFile in Directory.GetFiles(CosmosPaths.DebugStubSrc, "*.xs"))
{
GenerateAssembler(xGen.Generate(xFile));
}
}
else
{
foreach (var xManifestName in typeof(ReferenceHelper).Assembly.GetManifestResourceNames())
{
if (!xManifestName.EndsWith(".xs", StringComparison.OrdinalIgnoreCase))
{
continue;
}
using (var xStream = typeof(ReferenceHelper).Assembly.GetManifestResourceStream(xManifestName))
{
using (var xReader = new StreamReader(xStream))
{
GenerateAssembler(xGen.Generate(xReader));
}
}
}
}
OnAfterEmitDebugStub();
}
else
{
XS.Label(AsmMarker.Labels[AsmMarker.Type.DebugStub_Step]);
XS.Return();
}
// Start emitting assembly labels
CurrentInstance.EmitAsmLabels = true;
}
