79 lines
3.3 KiB
C#
79 lines
3.3 KiB
C#
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using ARMeilleure.Memory;
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using System;
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using System.Runtime.InteropServices;
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namespace ARMeilleure.Translation.Cache
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{
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class JitCacheInvalidation
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{
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private static int[] _invalidationCode = new int[]
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{
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unchecked((int)0xd53b0022), // mrs x2, ctr_el0
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unchecked((int)0xd3504c44), // ubfx x4, x2, #16, #4
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unchecked((int)0x52800083), // mov w3, #0x4
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unchecked((int)0x12000c45), // and w5, w2, #0xf
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unchecked((int)0x1ac42064), // lsl w4, w3, w4
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unchecked((int)0x51000482), // sub w2, w4, #0x1
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unchecked((int)0x8a220002), // bic x2, x0, x2
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unchecked((int)0x1ac52063), // lsl w3, w3, w5
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unchecked((int)0xeb01005f), // cmp x2, x1
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unchecked((int)0x93407c84), // sxtw x4, w4
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unchecked((int)0x540000a2), // b.cs 3c <do_ic_clear>
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unchecked((int)0xd50b7b22), // dc cvau, x2
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unchecked((int)0x8b040042), // add x2, x2, x4
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unchecked((int)0xeb02003f), // cmp x1, x2
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unchecked((int)0x54ffffa8), // b.hi 2c <dc_clear_loop>
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unchecked((int)0xd5033b9f), // dsb ish
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unchecked((int)0x51000462), // sub w2, w3, #0x1
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unchecked((int)0x93407c63), // sxtw x3, w3
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unchecked((int)0x8a220000), // bic x0, x0, x2
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unchecked((int)0xeb00003f), // cmp x1, x0
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unchecked((int)0x540000a9), // b.ls 64 <exit>
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unchecked((int)0xd50b7520), // ic ivau, x0
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unchecked((int)0x8b030000), // add x0, x0, x3
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unchecked((int)0xeb00003f), // cmp x1, x0
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unchecked((int)0x54ffffa8), // b.hi 54 <ic_clear_loop>
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unchecked((int)0xd5033b9f), // dsb ish
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unchecked((int)0xd5033fdf), // isb
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unchecked((int)0xd65f03c0), // ret
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};
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private delegate void InvalidateCache(ulong start, ulong end);
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private InvalidateCache _invalidateCache;
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private ReservedRegion _invalidateCacheCodeRegion;
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private readonly bool _needsInvalidation;
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public JitCacheInvalidation(IJitMemoryAllocator allocator)
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{
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// On macOS, a different path is used to write to the JIT cache, which does the invalidation.
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if (!OperatingSystem.IsMacOS() && RuntimeInformation.ProcessArchitecture == Architecture.Arm64)
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{
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ulong size = (ulong)_invalidationCode.Length * sizeof(int);
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ulong mask = (ulong)ReservedRegion.DefaultGranularity - 1;
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size = (size + mask) & ~mask;
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_invalidateCacheCodeRegion = new ReservedRegion(allocator, size);
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_invalidateCacheCodeRegion.ExpandIfNeeded(size);
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Marshal.Copy(_invalidationCode, 0, _invalidateCacheCodeRegion.Pointer, _invalidationCode.Length);
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_invalidateCacheCodeRegion.Block.MapAsRx(0, size);
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_invalidateCache = Marshal.GetDelegateForFunctionPointer<InvalidateCache>(_invalidateCacheCodeRegion.Pointer);
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_needsInvalidation = true;
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}
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}
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public void Invalidate(IntPtr basePointer, ulong size)
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{
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if (_needsInvalidation)
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{
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_invalidateCache((ulong)basePointer, (ulong)basePointer + size);
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}
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}
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}
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}
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