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Ryujinx/Ryujinx.Memory/WindowsShared/WindowsApi.cs
gdkchan 95017b8c66
Support memory aliasing (#2954)
* Back to the origins: Make memory manager take guest PA rather than host address once again

* Direct mapping with alias support on Windows

* Fixes and remove more of the emulated shared memory

* Linux support

* Make shared and transfer memory not depend on SharedMemoryStorage

* More efficient view mapping on Windows (no more restricted to 4KB pages at a time)

* Handle potential access violations caused by partial unmap

* Implement host mapping using shared memory on Linux

* Add new GetPhysicalAddressChecked method, used to ensure the virtual address is mapped before address translation

Also align GetRef behaviour with software memory manager

* We don't need a mirrorable memory block for software memory manager mode

* Disable memory aliasing tests while we don't have shared memory support on Mac

* Shared memory & SIGBUS handler for macOS

* Fix typo + nits + re-enable memory tests

* Set MAP_JIT_DARWIN on x86 Mac too

* Add back the address space mirror

* Only set MAP_JIT_DARWIN if we are mapping as executable

* Disable aliasing tests again (still fails on Mac)

* Fix UnmapView4KB (by not casting size to int)

* Use ref counting on memory blocks to delay closing the shared memory handle until all blocks using it are disposed

* Address PR feedback

* Make RO hold a reference to the guest process memory manager to avoid early disposal

Co-authored-by: nastys <nastys@users.noreply.github.com>
2022-05-02 20:30:02 -03:00

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3.5 KiB
C#

using System;
using System.Runtime.InteropServices;
namespace Ryujinx.Memory.WindowsShared
{
static class WindowsApi
{
public static readonly IntPtr InvalidHandleValue = new IntPtr(-1);
public static readonly IntPtr CurrentProcessHandle = new IntPtr(-1);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern IntPtr VirtualAlloc(
IntPtr lpAddress,
IntPtr dwSize,
AllocationType flAllocationType,
MemoryProtection flProtect);
[DllImport("KernelBase.dll", SetLastError = true)]
public static extern IntPtr VirtualAlloc2(
IntPtr process,
IntPtr lpAddress,
IntPtr dwSize,
AllocationType flAllocationType,
MemoryProtection flProtect,
IntPtr extendedParameters,
ulong parameterCount);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool VirtualProtect(
IntPtr lpAddress,
IntPtr dwSize,
MemoryProtection flNewProtect,
out MemoryProtection lpflOldProtect);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool VirtualFree(IntPtr lpAddress, IntPtr dwSize, AllocationType dwFreeType);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern IntPtr CreateFileMapping(
IntPtr hFile,
IntPtr lpFileMappingAttributes,
FileMapProtection flProtect,
uint dwMaximumSizeHigh,
uint dwMaximumSizeLow,
[MarshalAs(UnmanagedType.LPWStr)] string lpName);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool CloseHandle(IntPtr hObject);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern IntPtr MapViewOfFile(
IntPtr hFileMappingObject,
uint dwDesiredAccess,
uint dwFileOffsetHigh,
uint dwFileOffsetLow,
IntPtr dwNumberOfBytesToMap);
[DllImport("KernelBase.dll", SetLastError = true)]
public static extern IntPtr MapViewOfFile3(
IntPtr hFileMappingObject,
IntPtr process,
IntPtr baseAddress,
ulong offset,
IntPtr dwNumberOfBytesToMap,
ulong allocationType,
MemoryProtection dwDesiredAccess,
IntPtr extendedParameters,
ulong parameterCount);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool UnmapViewOfFile(IntPtr lpBaseAddress);
[DllImport("KernelBase.dll", SetLastError = true)]
public static extern bool UnmapViewOfFile2(IntPtr process, IntPtr lpBaseAddress, ulong unmapFlags);
[DllImport("kernel32.dll")]
public static extern uint GetLastError();
public static MemoryProtection GetProtection(MemoryPermission permission)
{
return permission switch
{
MemoryPermission.None => MemoryProtection.NoAccess,
MemoryPermission.Read => MemoryProtection.ReadOnly,
MemoryPermission.ReadAndWrite => MemoryProtection.ReadWrite,
MemoryPermission.ReadAndExecute => MemoryProtection.ExecuteRead,
MemoryPermission.ReadWriteExecute => MemoryProtection.ExecuteReadWrite,
MemoryPermission.Execute => MemoryProtection.Execute,
_ => throw new MemoryProtectionException(permission)
};
}
}
}