Implement IRoInterface (#445)

* Implement IRoInterface

This is required by Super Mario Party.
This commit also adds MapProcessCodeMemory and UnmapProcessCodeMemory functions in KMemoryManager. Those two calls might not reflect what the SVC of the same names do.

* Fix some code style issues

* Use MakeError to clarify error code

* Add NRR and NRO constants

* Fix some codestyle issues

* Fix InvalidMemoryState error code

1 files changed, 36 insertions, 8 deletions

diff --git a/Ryujinx.HLE/Loaders/Executable.cs b/Ryujinx.HLE/Loaders/Executable.cs
index a9850e4a..3c63af14 100644
--- a/Ryujinx.HLE/Loaders/Executable.cs
+++ b/Ryujinx.HLE/Loaders/Executable.cs
@@ -49,21 +49,49 @@ namespace Ryujinx.HLE.Loaders
             long DataPosition = ImageBase + (uint)Exe.DataOffset;
 
             long TextSize = (uint)IntUtils.AlignUp(Exe.Text.Length, KMemoryManager.PageSize);
-            long ROSize   = (uint)IntUtils.AlignUp(Exe.RO.Length,   KMemoryManager.PageSize);
+            long ROSize   = (uint)IntUtils.AlignUp(Exe.RO.Length, KMemoryManager.PageSize);
             long DataSize = (uint)IntUtils.AlignUp(Exe.Data.Length, KMemoryManager.PageSize);
+            long BssSize  = (uint)IntUtils.AlignUp(Exe.BssSize, KMemoryManager.PageSize);
 
-            long DataAndBssSize = (uint)IntUtils.AlignUp(Exe.BssSize, KMemoryManager.PageSize) + DataSize;
+            long DataAndBssSize = BssSize + DataSize;
 
             ImageEnd = DataPosition + DataAndBssSize;
 
-            MemoryManager.HleMapProcessCode(TextPosition, TextSize + ROSize + DataAndBssSize);
+            if (Exe.SourceAddress == 0)
+            {
+                MemoryManager.HleMapProcessCode(TextPosition, TextSize + ROSize + DataAndBssSize);
+
+                MemoryManager.SetProcessMemoryPermission(ROPosition, ROSize, MemoryPermission.Read);
+                MemoryManager.SetProcessMemoryPermission(DataPosition, DataAndBssSize, MemoryPermission.ReadAndWrite);
 
-            MemoryManager.SetProcessMemoryPermission(ROPosition,   ROSize,         MemoryPermission.Read);
-            MemoryManager.SetProcessMemoryPermission(DataPosition, DataAndBssSize, MemoryPermission.ReadAndWrite);
+                Memory.WriteBytes(TextPosition, Exe.Text);
+                Memory.WriteBytes(ROPosition, Exe.RO);
+                Memory.WriteBytes(DataPosition, Exe.Data);
+            }
+            else
+            {
+                long Result = MemoryManager.MapProcessCodeMemory(TextPosition, Exe.SourceAddress, TextSize + ROSize + DataSize);
+
+                if (Result != 0)
+                {
+                    throw new InvalidOperationException();
+                }
 
-            Memory.WriteBytes(TextPosition, Exe.Text);
-            Memory.WriteBytes(ROPosition,   Exe.RO);
-            Memory.WriteBytes(DataPosition, Exe.Data);
+                MemoryManager.SetProcessMemoryPermission(ROPosition, ROSize, MemoryPermission.Read);
+                MemoryManager.SetProcessMemoryPermission(DataPosition, DataSize, MemoryPermission.ReadAndWrite);
+
+                if (Exe.BssAddress != 0 && Exe.BssSize != 0)
+                {
+                    Result = MemoryManager.MapProcessCodeMemory(DataPosition + DataSize, Exe.BssAddress, BssSize);
+
+                    if (Result != 0)
+                    {
+                        throw new InvalidOperationException();
+                    }
+
+                    MemoryManager.SetProcessMemoryPermission(DataPosition + DataSize, BssSize, MemoryPermission.ReadAndWrite);
+                }
+            }
 
             if (Exe.Mod0Offset == 0)
             {