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This commit is contained in:
Matthijs ter Woord 2016-06-17 13:38:19 -04:00
parent 7a8e62b2eb
commit 47f7e95ccf
1 changed files with 22 additions and 60 deletions
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82
source/Cosmos.Core.Plugs/Assemblers/UpdateIDT.cs
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@ -3,6 +3,7 @@ using System.Reflection;
using Cosmos.Assembler.x86.x87;
using Cosmos.IL2CPU.Plugs;
using XSharp.Compiler;
using static XSharp.Compiler.XSRegisters;
using CPUx86 = Cosmos.Assembler.x86;
using CPUAll = Cosmos.Assembler;
@ -55,53 +56,14 @@ namespace Cosmos.Core.Plugs
continue;
}
XS.Set(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.EAX), "__ISR_Handler_" + i.ToString("X2"));
new CPUx86.Mov
{
DestinationRef = CPUAll.ElementReference.New("_NATIVE_IDT_Contents"),
DestinationIsIndirect = true,
DestinationDisplacement = ((i * 8) + 0),
SourceReg = CPUx86.RegistersEnum.AL
};
new CPUx86.Mov
{
DestinationRef = CPUAll.ElementReference.New("_NATIVE_IDT_Contents"),
DestinationIsIndirect = true,
DestinationDisplacement = ((i * 8) + 1),
SourceReg = CPUx86.RegistersEnum.AH
};
new CPUx86.Mov
{
DestinationRef = CPUAll.ElementReference.New("_NATIVE_IDT_Contents"),
DestinationIsIndirect = true,
DestinationDisplacement = ((i * 8) + 2),
SourceValue = 0x8,
Size = 8
};
new CPUx86.Mov
{
DestinationRef = CPUAll.ElementReference.New("_NATIVE_IDT_Contents"),
DestinationIsIndirect = true,
DestinationDisplacement = ((i * 8) + 5),
SourceValue = 0x8E,
Size = 8
};
XS.ShiftRight(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.EAX), 16);
new CPUx86.Mov
{
DestinationRef = CPUAll.ElementReference.New("_NATIVE_IDT_Contents"),
DestinationIsIndirect = true,
DestinationDisplacement = ((i * 8) + 6),
SourceReg = CPUx86.RegistersEnum.AL
};
new CPUx86.Mov
{
DestinationRef = CPUAll.ElementReference.New("_NATIVE_IDT_Contents"),
DestinationIsIndirect = true,
DestinationDisplacement = ((i * 8) + 7),
SourceReg = CPUx86.RegistersEnum.AH
};
XS.Set(OldToNewRegister(CPUx86.RegistersEnum.EAX), "__ISR_Handler_" + i.ToString("X2"));
XS.Set("_NATIVE_IDT_Contents", AL, destinationDisplacement: (i * 8) + 0);
XS.Set("_NATIVE_IDT_Contents", AH, destinationDisplacement: (i * 8) + 1);
XS.Set("_NATIVE_IDT_Contents", 0x8, destinationDisplacement: (i * 8) + 2, size: RegisterSize.Byte8);
XS.Set("_NATIVE_IDT_Contents", 0x8E, destinationDisplacement: (i * 8) + 5, size: RegisterSize.Byte8);
XS.ShiftRight(OldToNewRegister(CPUx86.RegistersEnum.EAX), 16);
XS.Set("_NATIVE_IDT_Contents", AL, destinationDisplacement: (i * 8) + 6);
XS.Set("_NATIVE_IDT_Contents", AH, destinationDisplacement: (i * 8) + 7);
}
XS.Jump("__AFTER__ALL__ISR__HANDLER__STUBS__");
@ -118,17 +80,17 @@ namespace Cosmos.Core.Plugs
XS.Push((uint)j);
XS.PushAllRegisters();
XS.Sub(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.ESP), 4);
XS.Set(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.EAX), XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.ESP)); // preserve old stack address for passing to interrupt handler
XS.Sub(OldToNewRegister(CPUx86.RegistersEnum.ESP), 4);
XS.Set(OldToNewRegister(CPUx86.RegistersEnum.EAX), OldToNewRegister(CPUx86.RegistersEnum.ESP)); // preserve old stack address for passing to interrupt handler
// store floating point data
XS.And(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.ESP), 0xfffffff0); // fxsave needs to be 16-byte alligned
XS.Sub(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.ESP), 512); // fxsave needs 512 bytes
XS.SSE.FXSave(XSRegisters.ESP, isIndirect: true); // save the registers
XS.Set(XSRegisters.EAX, XSRegisters.ESP, destinationIsIndirect: true);
XS.And(OldToNewRegister(CPUx86.RegistersEnum.ESP), 0xfffffff0); // fxsave needs to be 16-byte alligned
XS.Sub(OldToNewRegister(CPUx86.RegistersEnum.ESP), 512); // fxsave needs 512 bytes
XS.SSE.FXSave(ESP, isIndirect: true); // save the registers
XS.Set(EAX, ESP, destinationIsIndirect: true);
XS.Push(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.EAX)); //
XS.Push(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.EAX)); // pass old stack address (pointer to InterruptContext struct) to the interrupt handler
XS.Push(OldToNewRegister(CPUx86.RegistersEnum.EAX)); //
XS.Push(OldToNewRegister(CPUx86.RegistersEnum.EAX)); // pass old stack address (pointer to InterruptContext struct) to the interrupt handler
XS.JumpToSegment(8, "__ISR_Handler_" + j.ToString("X2") + "_SetCS");
XS.Label("__ISR_Handler_" + j.ToString("X2") + "_SetCS");
@ -138,15 +100,15 @@ namespace Cosmos.Core.Plugs
xHandler = GetMethodDef(typeof(INTs).Assembly, typeof(INTs).FullName, "HandleInterrupt_Default", true);
}
XS.Call(CPUAll.LabelName.Get(xHandler));
XS.Pop(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.EAX));
XS.SSE.FXRestore(XSRegisters.ESP, isIndirect: true);
XS.Pop(OldToNewRegister(CPUx86.RegistersEnum.EAX));
XS.SSE.FXRestore(ESP, isIndirect: true);
XS.Set(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.ESP), XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.EAX)); // this restores the stack for the FX stuff, except the pointer to the FX data
XS.Add(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.ESP), 4); // "pop" the pointer
XS.Set(OldToNewRegister(CPUx86.RegistersEnum.ESP), OldToNewRegister(CPUx86.RegistersEnum.EAX)); // this restores the stack for the FX stuff, except the pointer to the FX data
XS.Add(OldToNewRegister(CPUx86.RegistersEnum.ESP), 4); // "pop" the pointer
XS.PopAllRegisters();
XS.Add(XSRegisters.OldToNewRegister(CPUx86.RegistersEnum.ESP), 8);
XS.Add(OldToNewRegister(CPUx86.RegistersEnum.ESP), 8);
new CPUAll.Label("__ISR_Handler_" + j.ToString("X2") + "_END");
XS.InterruptReturn();
}