41 lines
1.2 KiB
C#
41 lines
1.2 KiB
C#
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//////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// This file defines an architecture-neutral encapsulation of the state which is saved
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// during a thread context switch.
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using System;
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using System.Runtime.InteropServices;
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using System.Runtime.CompilerServices;
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namespace Microsoft.Singularity.Isal.Arm
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{
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// DispatchStack is a small per-cpu stack allocated to be used as the shadowed
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// sp in exception modes. Its sole purpose is to save enough state to get
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// us back to normal execution mode.
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// The code in Interrupt.asm assumes that r4 is at offset 0 and
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[AccessedByRuntime("referenced in asm", AllFields = true)]
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[CLSCompliant(false)]
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[StructLayout(LayoutKind.Sequential)]
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public struct DispatchStack
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{
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private uint r4;
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private uint sp; // aka r13
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public unsafe UIntPtr StackBegin
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{
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[NoHeapAllocation]
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get {
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fixed (uint *p = &r4) {
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return (UIntPtr) p;
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}
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}
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}
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}
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};
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