From 00579927e43bf55ee06ae02933c1e755fb4120eb Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Wed, 28 Nov 2018 20:18:09 -0200
Subject: Better process implementation (#491)

* Initial implementation of KProcess

* Some improvements to the memory manager, implement back guest stack trace printing

* Better GetInfo implementation, improve checking in some places with information from process capabilities

* Allow the cpu to read/write from the correct memory locations for accesses crossing a page boundary

* Change long -> ulong for address/size on memory related methods to avoid unnecessary casts

* Attempt at implementing ldr:ro with new KProcess

* Allow BSS with size 0 on ldr:ro

* Add checking for memory block slab heap usage, return errors if full, exit gracefully

* Use KMemoryBlockSize const from KMemoryManager

* Allow all methods to read from non-contiguous locations

* Fix for TransactParcelAuto

* Address PR feedback, additionally fix some small issues related to the KIP loader and implement SVCs GetProcessId, GetProcessList, GetSystemInfo, CreatePort and ManageNamedPort

* Fix wrong check for source pages count from page list on MapPhysicalMemory

* Fix some issues with UnloadNro on ldr:ro
---
 Ryujinx.HLE/HOS/Kernel/KernelTransfer.cs | 71 ++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 Ryujinx.HLE/HOS/Kernel/KernelTransfer.cs

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

diff --git a/Ryujinx.HLE/HOS/Kernel/KernelTransfer.cs b/Ryujinx.HLE/HOS/Kernel/KernelTransfer.cs
new file mode 100644
index 00000000..a3fabeae
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Kernel/KernelTransfer.cs
@@ -0,0 +1,71 @@
+using ChocolArm64.Memory;
+
+namespace Ryujinx.HLE.HOS.Kernel
+{
+    static class KernelTransfer
+    {
+        public static bool UserToKernelInt32(Horizon System, long Address, out int Value)
+        {
+            KProcess CurrentProcess = System.Scheduler.GetCurrentProcess();
+
+            if (CurrentProcess.CpuMemory.IsMapped(Address) &&
+                CurrentProcess.CpuMemory.IsMapped(Address + 3))
+            {
+                Value = CurrentProcess.CpuMemory.ReadInt32(Address);
+
+                return true;
+            }
+
+            Value = 0;
+
+            return false;
+        }
+
+        public static bool UserToKernelString(Horizon System, long Address, int Size, out string Value)
+        {
+            KProcess CurrentProcess = System.Scheduler.GetCurrentProcess();
+
+            if (CurrentProcess.CpuMemory.IsMapped(Address) &&
+                CurrentProcess.CpuMemory.IsMapped(Address + Size - 1))
+            {
+                Value = MemoryHelper.ReadAsciiString(CurrentProcess.CpuMemory, Address, Size);
+
+                return true;
+            }
+
+            Value = null;
+
+            return false;
+        }
+
+        public static bool KernelToUserInt32(Horizon System, long Address, int Value)
+        {
+            KProcess CurrentProcess = System.Scheduler.GetCurrentProcess();
+
+            if (CurrentProcess.CpuMemory.IsMapped(Address) &&
+                CurrentProcess.CpuMemory.IsMapped(Address + 3))
+            {
+                CurrentProcess.CpuMemory.WriteInt32ToSharedAddr(Address, Value);
+
+                return true;
+            }
+
+            return false;
+        }
+
+        public static bool KernelToUserInt64(Horizon System, long Address, long Value)
+        {
+            KProcess CurrentProcess = System.Scheduler.GetCurrentProcess();
+
+            if (CurrentProcess.CpuMemory.IsMapped(Address) &&
+                CurrentProcess.CpuMemory.IsMapped(Address + 7))
+            {
+                CurrentProcess.CpuMemory.WriteInt64(Address, Value);
+
+                return true;
+            }
+
+            return false;
+        }
+    }
+}
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