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IDT

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This commit is contained in:
kudzu_cp 2011-07-14 20:22:46 +00:00
parent 5d145c351a
commit 008bd31e4e
1 changed files with 9 additions and 12 deletions
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21
source2/IL2CPU/Cosmos.IL2CPU.X86/CosmosAssembler.cs
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@ -87,8 +87,8 @@ namespace Cosmos.IL2CPU.X86 {
return xResult;
}
byte mGdCode;
byte mGdData;
UInt16 mGdCode;
UInt16 mGdData;
public void CreateGDT() {
new Comment(this, "BEGIN - Create GDT");
var xGDT = new List<byte>();
@ -103,7 +103,6 @@ namespace Cosmos.IL2CPU.X86 {
xGDT.AddRange(GdtDescriptor(0x00000000, 0xFFFFFFFF, false));
DataMembers.Add(new DataMember("_NATIVE_GDT_Contents", xGDT.ToArray()));
new Comment("Tell CPU about GDT");
var xGdtPtr = new UInt16[3];
// Size of GDT Table - 1
@ -120,12 +119,12 @@ namespace Cosmos.IL2CPU.X86 {
new Lgdt { DestinationReg = Registers.EAX, DestinationIsIndirect = true };
new Comment("Set data segments");
new Move { DestinationReg = Registers.AX, SourceValue = mGdData };
new Move { DestinationReg = Registers.DS, SourceReg = Registers.AX };
new Move { DestinationReg = Registers.ES, SourceReg = Registers.AX };
new Move { DestinationReg = Registers.FS, SourceReg = Registers.AX };
new Move { DestinationReg = Registers.GS, SourceReg = Registers.AX };
new Move { DestinationReg = Registers.SS, SourceReg = Registers.AX };
new Move { DestinationReg = Registers.EAX, SourceValue = mGdData };
new Move { DestinationReg = Registers.DS, SourceReg = Registers.EAX };
new Move { DestinationReg = Registers.ES, SourceReg = Registers.EAX };
new Move { DestinationReg = Registers.FS, SourceReg = Registers.EAX };
new Move { DestinationReg = Registers.GS, SourceReg = Registers.EAX };
new Move { DestinationReg = Registers.SS, SourceReg = Registers.EAX };
new Comment("Force reload of code segment");
new JumpToSegment { Segment = mGdCode, DestinationLabel = "Boot_FlushCsGDT" };
@ -144,9 +143,7 @@ namespace Cosmos.IL2CPU.X86 {
new Move { DestinationRef = xIDT, DestinationIsIndirect = true, DestinationDisplacement = xOffset + 7, SourceReg = Registers.AH };
// Code Segment
//TODO: Selectors are 16 bit, convert it to 16 bit but also check GDT settings first (prob just old code)
new Move { DestinationRef = xIDT, DestinationIsIndirect = true, DestinationDisplacement = xOffset + 2, SourceValue = mGdCode, Size = 8 };
new Move { DestinationRef = xIDT, DestinationIsIndirect = true, DestinationDisplacement = xOffset + 3, SourceValue = 0x00, Size = 8 };
new Move { DestinationRef = xIDT, DestinationIsIndirect = true, DestinationDisplacement = xOffset + 2, SourceValue = mGdCode, Size = 16 };
// Reserved
new Move { DestinationRef = xIDT, DestinationIsIndirect = true, DestinationDisplacement = xOffset + 4, SourceValue = 0x00, Size = 8 };