Rewrite SVC handler using source generators rather than IL emit (#3371)

* Implement syscall handlers using a source generator

* Copy FlushProcessDataCache implementation to Syscall since it was only implemented on Syscall32

* Fix wrong argument order in some syscalls

* Delete old Reflection.Emit based syscall handling code

* Improvements to the code generation

* ControlCodeMemory address and size is always 64-bit

1 files changed, 54 insertions, 0 deletions

diff --git a/Ryujinx.Horizon.Generators/Kernel/SyscallSyntaxReceiver.cs b/Ryujinx.Horizon.Generators/Kernel/SyscallSyntaxReceiver.cs
new file mode 100644
index 00000000..e2e8e1d3
--- /dev/null
+++ b/Ryujinx.Horizon.Generators/Kernel/SyscallSyntaxReceiver.cs
@@ -0,0 +1,54 @@
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Ryujinx.Horizon.Generators.Kernel
+{
+    class SyscallSyntaxReceiver : ISyntaxReceiver
+    {
+        public List<MethodDeclarationSyntax> SvcImplementations { get; }
+
+        public SyscallSyntaxReceiver()
+        {
+            SvcImplementations = new List<MethodDeclarationSyntax>();
+        }
+
+        public void OnVisitSyntaxNode(SyntaxNode syntaxNode)
+        {
+            if (syntaxNode is ClassDeclarationSyntax classDeclaration && classDeclaration.AttributeLists.Count != 0)
+            {
+                foreach (var attributeList in classDeclaration.AttributeLists)
+                {
+                    if (attributeList.Attributes.Any(x => x.Name.GetText().ToString() == "SvcImpl"))
+                    {
+                        foreach (var memberDeclaration in classDeclaration.Members)
+                        {
+                            if (memberDeclaration is MethodDeclarationSyntax methodDeclaration)
+                            {
+                                VisitMethod(methodDeclaration);
+                            }
+                        }
+
+                        break;
+                    }
+                }
+            }
+        }
+
+        private void VisitMethod(MethodDeclarationSyntax methodDeclaration)
+        {
+            if (methodDeclaration.AttributeLists.Count != 0)
+            {
+                foreach (var attributeList in methodDeclaration.AttributeLists)
+                {
+                    if (attributeList.Attributes.Any(x => x.Name.GetText().ToString() == "Svc"))
+                    {
+                        SvcImplementations.Add(methodDeclaration);
+                        break;
+                    }
+                }
+            }
+        }
+    }
+}