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Implement a new JIT for Arm devices (#6057)

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* Implement a new JIT for Arm devices

* Auto-format

* Make a lot of Assembler members read-only

* More read-only

* Fix more warnings

* ObjectDisposedException.ThrowIf

* New JIT cache for platforms that enforce W^X, currently unused

* Remove unused using

* Fix assert

* Pass memory manager type around

* Safe memory manager mode support + other improvements

* Actual safe memory manager mode masking support

* PR feedback
This commit is contained in:
gdkchan
2024-01-20 11:11:28 -03:00
committed by GitHub
parent 331c07807f
commit 427b7d06b5
135 changed files with 43322 additions and 24 deletions
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29
src/ARMeilleure/Translation/TranslatorStubs.cs
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@ -1,3 +1,4 @@
using ARMeilleure.Common;
using ARMeilleure.Instructions;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.State;
@ -14,11 +15,11 @@ namespace ARMeilleure.Translation
/// </summary>
class TranslatorStubs : IDisposable
{
private static readonly Lazy<IntPtr> _slowDispatchStub = new(GenerateSlowDispatchStub, isThreadSafe: true);
private readonly Lazy<IntPtr> _slowDispatchStub;
private bool _disposed;
private readonly Translator _translator;
private readonly AddressTable<ulong> _functionTable;
private readonly Lazy<IntPtr> _dispatchStub;
private readonly Lazy<DispatcherFunction> _dispatchLoop;
private readonly Lazy<WrapperFunction> _contextWrapper;
@ -83,13 +84,14 @@ namespace ARMeilleure.Translation
/// Initializes a new instance of the <see cref="TranslatorStubs"/> class with the specified
/// <see cref="Translator"/> instance.
/// </summary>
/// <param name="translator"><see cref="Translator"/> instance to use</param>
/// <param name="functionTable">Function table used to store pointers to the functions that the guest code will call</param>
/// <exception cref="ArgumentNullException"><paramref name="translator"/> is null</exception>
public TranslatorStubs(Translator translator)
public TranslatorStubs(AddressTable<ulong> functionTable)
{
ArgumentNullException.ThrowIfNull(translator);
ArgumentNullException.ThrowIfNull(functionTable);
_translator = translator;
_functionTable = functionTable;
_slowDispatchStub = new(GenerateSlowDispatchStub, isThreadSafe: true);
_dispatchStub = new(GenerateDispatchStub, isThreadSafe: true);
_dispatchLoop = new(GenerateDispatchLoop, isThreadSafe: true);
_contextWrapper = new(GenerateContextWrapper, isThreadSafe: true);
@ -151,15 +153,15 @@ namespace ARMeilleure.Translation
context.Add(nativeContext, Const((ulong)NativeContext.GetDispatchAddressOffset())));
// Check if guest address is within range of the AddressTable.
Operand masked = context.BitwiseAnd(guestAddress, Const(~_translator.FunctionTable.Mask));
Operand masked = context.BitwiseAnd(guestAddress, Const(~_functionTable.Mask));
context.BranchIfTrue(lblFallback, masked);
Operand index = default;
Operand page = Const((long)_translator.FunctionTable.Base);
Operand page = Const((long)_functionTable.Base);
for (int i = 0; i < _translator.FunctionTable.Levels.Length; i++)
for (int i = 0; i < _functionTable.Levels.Length; i++)
{
ref var level = ref _translator.FunctionTable.Levels[i];
ref var level = ref _functionTable.Levels[i];
// level.Mask is not used directly because it is more often bigger than 32-bits, so it will not
// be encoded as an immediate on x86's bitwise and operation.
@ -167,7 +169,7 @@ namespace ARMeilleure.Translation
index = context.BitwiseAnd(context.ShiftRightUI(guestAddress, Const(level.Index)), mask);
if (i < _translator.FunctionTable.Levels.Length - 1)
if (i < _functionTable.Levels.Length - 1)
{
page = context.Load(OperandType.I64, context.Add(page, context.ShiftLeft(index, Const(3))));
context.BranchIfFalse(lblFallback, page);
@ -196,7 +198,7 @@ namespace ARMeilleure.Translation
/// Generates a <see cref="SlowDispatchStub"/>.
/// </summary>
/// <returns>Generated <see cref="SlowDispatchStub"/></returns>
private static IntPtr GenerateSlowDispatchStub()
private IntPtr GenerateSlowDispatchStub()
{
var context = new EmitterContext();
@ -205,8 +207,7 @@ namespace ARMeilleure.Translation
Operand guestAddress = context.Load(OperandType.I64,
context.Add(nativeContext, Const((ulong)NativeContext.GetDispatchAddressOffset())));
MethodInfo getFuncAddress = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFunctionAddress));
Operand hostAddress = context.Call(getFuncAddress, guestAddress);
Operand hostAddress = context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFunctionAddress)), guestAddress);
context.Tailcall(hostAddress, nativeContext);
var cfg = context.GetControlFlowGraph();