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ryujinx-final/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableHostMapped.cs
Mary b4dc33efc2
kernel: Clear pages allocated with SetHeapSize (#2776)
* kernel: Clear pages allocated with SetHeapSize

Before this commit, all new pages allocated by SetHeapSize were not
cleared by the kernel.

This would cause undefined data to be pass to the userland and possibly
resulting in weird memory corruption.

This commit also add support for custom fill heap and ipc value (that is also
supported by the official kernel)

* Remove dots at the end of KPageTableBase.MapPages new documentation

* Remove unused _stackFillValue
2021-10-24 18:52:59 -03:00

139 lines
4.4 KiB
C#

using Ryujinx.HLE.HOS.Kernel.Common;
using Ryujinx.Memory;
using Ryujinx.Memory.Range;
using System;
using System.Collections.Generic;
using System.Linq;
namespace Ryujinx.HLE.HOS.Kernel.Memory
{
class KPageTableHostMapped : KPageTableBase
{
private const int CopyChunckSize = 0x100000;
private readonly IVirtualMemoryManager _cpuMemory;
public override bool SupportsMemoryAliasing => false;
public KPageTableHostMapped(KernelContext context, IVirtualMemoryManager cpuMemory) : base(context)
{
_cpuMemory = cpuMemory;
}
/// <inheritdoc/>
protected override IEnumerable<HostMemoryRange> GetPhysicalRegions(ulong va, ulong size)
{
return _cpuMemory.GetPhysicalRegions(va, size);
}
/// <inheritdoc/>
protected override ReadOnlySpan<byte> GetSpan(ulong va, int size)
{
return _cpuMemory.GetSpan(va, size);
}
/// <inheritdoc/>
protected override KernelResult MapMemory(ulong src, ulong dst, ulong pagesCount, KMemoryPermission oldSrcPermission, KMemoryPermission newDstPermission)
{
ulong size = pagesCount * PageSize;
_cpuMemory.Map(dst, 0, size);
ulong currentSize = size;
while (currentSize > 0)
{
ulong copySize = Math.Min(currentSize, CopyChunckSize);
_cpuMemory.Write(dst, _cpuMemory.GetSpan(src, (int)copySize));
currentSize -= copySize;
}
return KernelResult.Success;
}
/// <inheritdoc/>
protected override KernelResult UnmapMemory(ulong dst, ulong src, ulong pagesCount, KMemoryPermission oldDstPermission, KMemoryPermission newSrcPermission)
{
ulong size = pagesCount * PageSize;
// TODO: Validation.
ulong currentSize = size;
while (currentSize > 0)
{
ulong copySize = Math.Min(currentSize, CopyChunckSize);
_cpuMemory.Write(src, _cpuMemory.GetSpan(dst, (int)copySize));
currentSize -= copySize;
}
_cpuMemory.Unmap(dst, size);
return KernelResult.Success;
}
/// <inheritdoc/>
protected override KernelResult MapPages(ulong dstVa, ulong pagesCount, ulong srcPa, KMemoryPermission permission, bool shouldFillPages, byte fillValue)
{
_cpuMemory.Map(dstVa, 0, pagesCount * PageSize);
if (shouldFillPages)
{
_cpuMemory.Fill(dstVa, pagesCount * PageSize, fillValue);
}
return KernelResult.Success;
}
/// <inheritdoc/>
protected override KernelResult MapPages(ulong address, KPageList pageList, KMemoryPermission permission, bool shouldFillPages, byte fillValue)
{
ulong pagesCount = pageList.GetPagesCount();
_cpuMemory.Map(address, 0, pagesCount * PageSize);
if (shouldFillPages)
{
_cpuMemory.Fill(address, pagesCount * PageSize, fillValue);
}
return KernelResult.Success;
}
/// <inheritdoc/>
protected override KernelResult MapPages(ulong address, IEnumerable<HostMemoryRange> ranges, KMemoryPermission permission)
{
throw new NotSupportedException();
}
/// <inheritdoc/>
protected override KernelResult Unmap(ulong address, ulong pagesCount)
{
_cpuMemory.Unmap(address, pagesCount * PageSize);
return KernelResult.Success;
}
/// <inheritdoc/>
protected override KernelResult Reprotect(ulong address, ulong pagesCount, KMemoryPermission permission)
{
// TODO.
return KernelResult.Success;
}
/// <inheritdoc/>
protected override KernelResult ReprotectWithAttributes(ulong address, ulong pagesCount, KMemoryPermission permission)
{
// TODO.
return KernelResult.Success;
}
/// <inheritdoc/>
protected override void SignalMemoryTracking(ulong va, ulong size, bool write)
{
_cpuMemory.SignalMemoryTracking(va, size, write);
}
/// <inheritdoc/>
protected override void Write(ulong va, ReadOnlySpan<byte> data)
{
_cpuMemory.Write(va, data);
}
}
}