86fd0643c2
* Implement support for page sizes > 4KB * Check and work around more alignment issues * Was not meant to change this * Use MemoryBlock.GetPageSize() value for signal handler code * Do not take the path for private allocations if host supports 4KB pages * Add Flags attribute on MemoryMapFlags * Fix dirty region size with 16kb pages Would accidentally report a size that was too high (generally 16k instead of 4k, uploading 4x as much data) Co-authored-by: riperiperi <rhy3756547@hotmail.com>
75 lines
No EOL
2.4 KiB
C#
75 lines
No EOL
2.4 KiB
C#
using Ryujinx.Common;
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using Ryujinx.HLE.HOS.Kernel.Common;
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using Ryujinx.HLE.HOS.Kernel.Process;
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using Ryujinx.Horizon.Common;
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using Ryujinx.Memory;
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namespace Ryujinx.HLE.HOS.Kernel.Memory
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{
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class KSharedMemory : KAutoObject
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{
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private readonly KPageList _pageList;
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private readonly ulong _ownerPid;
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private readonly KMemoryPermission _ownerPermission;
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private readonly KMemoryPermission _userPermission;
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public KSharedMemory(
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KernelContext context,
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SharedMemoryStorage storage,
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ulong ownerPid,
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KMemoryPermission ownerPermission,
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KMemoryPermission userPermission) : base(context)
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{
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_pageList = storage.GetPageList();
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_ownerPid = ownerPid;
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_ownerPermission = ownerPermission;
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_userPermission = userPermission;
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}
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public Result MapIntoProcess(
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KPageTableBase memoryManager,
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ulong address,
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ulong size,
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KProcess process,
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KMemoryPermission permission)
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{
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if (_pageList.GetPagesCount() != BitUtils.DivRoundUp<ulong>(size, KPageTableBase.PageSize))
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{
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return KernelResult.InvalidSize;
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}
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KMemoryPermission expectedPermission = process.Pid == _ownerPid
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? _ownerPermission
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: _userPermission;
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if (permission != expectedPermission)
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{
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return KernelResult.InvalidPermission;
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}
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// On platforms with page size > 4 KB, this can fail due to the address not being page aligned,
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// we can return an error to force the application to retry with a different address.
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try
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{
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return memoryManager.MapPages(address, _pageList, MemoryState.SharedMemory, permission);
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}
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catch (InvalidMemoryRegionException)
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{
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return KernelResult.InvalidMemState;
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}
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}
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public Result UnmapFromProcess(KPageTableBase memoryManager, ulong address, ulong size, KProcess process)
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{
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if (_pageList.GetPagesCount() != BitUtils.DivRoundUp<ulong>(size, KPageTableBase.PageSize))
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{
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return KernelResult.InvalidSize;
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}
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return memoryManager.UnmapPages(address, _pageList, MemoryState.SharedMemory);
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}
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}
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} |