public static void SetupUserMode(Addr tssAddr)
{
KernelMessage.WriteLine("Setup GDT UserMode");
if (KConfig.UseTaskStateSegment)
{
TssAddr = tssAddr;
TssTable = (TaskStateSegmentTable *)tssAddr;
TssTable->Clear();
TssTable->AdressOfEntries = TssAddr + TaskStateSegmentTable.StructSize;
}
if (KConfig.UseTaskStateSegment)
{
// 9 - TSS
Tss = AddTSS();
//tss->esp0 = kernelStackPointer;
Tss->SS0 = 0x10;
Tss->Trace_bitmap = 0xdfff;
KernelMessage.WriteLine("Addr of tss: {0:X8}", (uint)Tss);
var tssEntry = DescriptorTableEntry.CreateTSS(Tss);
tssEntry.PriviligeRing = 0;
tssEntry.TSS_AVL = true;
tssEntry.Present = true;
GdtTable->AddEntry(tssEntry);
}
Flush();
if (KConfig.UseTaskStateSegment)
{
KernelMessage.WriteLine("LoadTaskRegister...");
//LoadTaskRegister();
//Debug, for breakpoint
//clockTicks++;
//DebugFunction1();
}
KernelMessage.WriteLine("Done");
}
public static void SetupUserMode(Addr tssAddr)
{
KernelMessage.WriteLine("Setup GDT UserMode");
if (KConfig.UseTaskStateSegment)
{
TssAddr = tssAddr;
TssTable = (TaskStateSegmentTable *)tssAddr;
TssTable->Clear();
TssTable->AdressOfEntries = TssAddr + TaskStateSegmentTable.StructSize;
}
//code segment
var codeEntry = DescriptorTableEntry.CreateCode(0, 0xFFFFFFFF);
codeEntry.CodeSegment_Readable = true;
codeEntry.PriviligeRing = 3;
codeEntry.Present = true;
codeEntry.AddressMode = DescriptorTableEntry.EAddressMode.Bits32;
codeEntry.CodeSegment_Confirming = false;
GdtTable->AddEntry(codeEntry);
//data segment
var dataEntry = DescriptorTableEntry.CreateData(0, 0xFFFFFFFF);
dataEntry.DataSegment_Writable = true;
dataEntry.PriviligeRing = 3;
dataEntry.Present = true;
dataEntry.AddressMode = DescriptorTableEntry.EAddressMode.Bits32;
GdtTable->AddEntry(dataEntry);
if (KConfig.UseTaskStateSegment)
{
//TSS
Tss = AddTSS();
//tss->esp0 = kernelStackPointer;
Tss->SS0 = 0x10;
Tss->Trace_bitmap = 0xdfff;
KernelMessage.WriteLine("Addr of tss: {0:X8}", (uint)Tss);
var tssEntry = DescriptorTableEntry.CreateTSS(Tss);
tssEntry.PriviligeRing = 0;
tssEntry.TSS_AVL = true;
tssEntry.Present = true;
GdtTable->AddEntry(tssEntry);
}
Flush();
if (KConfig.UseTaskStateSegment)
{
KernelMessage.WriteLine("LoadTaskRegister...");
//LoadTaskRegister();
//Debug, for breakpoint
//clockTicks++;
//DebugFunction1();
}
KernelMessage.WriteLine("Done");
}
