From 0644db02ad5d800fee4a3f7caad3cd0c8f5fbcdc Mon Sep 17 00:00:00 2001
From: Mary <me@thog.eu>
Date: Wed, 23 Jun 2021 21:52:11 +0200
Subject: kernel: Implement MapTransferMemory and UnmapTransferMemory (#2386)

Based on my reversing of kernel 12.0.0
---
 Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs | 86 ++++++++++++++++++++++++
 1 file changed, 86 insertions(+)

(limited to 'Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs')

diff --git a/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs b/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
index b3e202b3..d65a373d 100644
--- a/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
+++ b/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
@@ -1095,6 +1095,92 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
             return result;
         }
 
+        public KernelResult MapTransferMemory(int handle, ulong address, ulong size, KMemoryPermission permission)
+        {
+            if (!PageAligned(address))
+            {
+                return KernelResult.InvalidAddress;
+            }
+
+            if (!PageAligned(size) || size == 0)
+            {
+                return KernelResult.InvalidSize;
+            }
+
+            if (address + size <= address)
+            {
+                return KernelResult.InvalidMemState;
+            }
+
+            if (permission > KMemoryPermission.ReadAndWrite || permission == KMemoryPermission.Write)
+            {
+                return KernelResult.InvalidPermission;
+            }
+
+            KProcess currentProcess = KernelStatic.GetCurrentProcess();
+
+            KTransferMemory transferMemory = currentProcess.HandleTable.GetObject<KTransferMemory>(handle);
+
+            if (transferMemory == null)
+            {
+                return KernelResult.InvalidHandle;
+            }
+
+            if (currentProcess.MemoryManager.IsInvalidRegion(address, size) ||
+                currentProcess.MemoryManager.InsideHeapRegion(address, size) ||
+                currentProcess.MemoryManager.InsideAliasRegion(address, size))
+            {
+                return KernelResult.InvalidMemRange;
+            }
+
+            return transferMemory.MapIntoProcess(
+                currentProcess.MemoryManager,
+                address,
+                size,
+                currentProcess,
+                permission);
+        }
+
+        public KernelResult UnmapTransferMemory(int handle, ulong address, ulong size)
+        {
+            if (!PageAligned(address))
+            {
+                return KernelResult.InvalidAddress;
+            }
+
+            if (!PageAligned(size) || size == 0)
+            {
+                return KernelResult.InvalidSize;
+            }
+
+            if (address + size <= address)
+            {
+                return KernelResult.InvalidMemState;
+            }
+
+            KProcess currentProcess = KernelStatic.GetCurrentProcess();
+
+            KTransferMemory transferMemory = currentProcess.HandleTable.GetObject<KTransferMemory>(handle);
+
+            if (transferMemory == null)
+            {
+                return KernelResult.InvalidHandle;
+            }
+
+            if (currentProcess.MemoryManager.IsInvalidRegion(address, size) ||
+                currentProcess.MemoryManager.InsideHeapRegion(address, size) ||
+                currentProcess.MemoryManager.InsideAliasRegion(address, size))
+            {
+                return KernelResult.InvalidMemRange;
+            }
+
+            return transferMemory.UnmapFromProcess(
+                currentProcess.MemoryManager,
+                address,
+                size,
+                currentProcess);
+        }
+
         public KernelResult MapPhysicalMemory(ulong address, ulong size)
         {
             if (!PageAligned(address))
-- 
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