Add the TamperMachine module for runtime mods and cheats (#1928)

* Add initial implementation of the Tamper Machine

* Implement Atmosphere opcodes 0, 4 and 9

* Add missing TamperCompilationException class

* Implement Atmosphere conditional and loop opcodes 1, 2 and 3

* Inplement input conditional opcode 8

* Add register store opcode A

* Implement extended pause/resume opcodes FF0 and FF1

* Implement extended log opcode FFF

* Implement extended register conditional opcode C0

* Refactor TamperProgram to an interface

* Moved Atmosphere classes to a separate subdirectory

* Fix OpProcCtrl class not setting process

* Implement extended register save/restore opcodes C1, C2 and C3

* Refactor code emitters to separate classes

* Supress memory access errors from the Tamper Machine

* Add debug information to tamper register and memory writes

* Add block stack check to Atmosphere Cheat compiler

* Add handheld input support to Tamper Machine

* Fix code styling

* Fix build id and cheat case mismatch

* Fix invalid immediate size selection

* Print build ids of the title

* Prevent Tamper Machine from change code regions

* Remove Atmosphere namespace

* Remove empty cheats from the list

* Prevent code modification without disabling the tampering

* Fix missing addressing mode in LoadRegisterWithMemory

* Fix wrong addressing in RegisterConditional

* Add name to the tamper machine thread

* Fix code styling

1 files changed, 50 insertions, 0 deletions

diff --git a/Ryujinx.HLE/HOS/Tamper/CodeEmitters/EndConditionalBlock.cs b/Ryujinx.HLE/HOS/Tamper/CodeEmitters/EndConditionalBlock.cs
new file mode 100644
index 00000000..4a01992c
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Tamper/CodeEmitters/EndConditionalBlock.cs
@@ -0,0 +1,50 @@
+using Ryujinx.HLE.Exceptions;
+using Ryujinx.HLE.HOS.Tamper.Conditions;
+using Ryujinx.HLE.HOS.Tamper.Operations;
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Tamper.CodeEmitters
+{
+    /// <summary>
+    /// Code type 2 marks the end of a conditional block (started by Code Type 1, Code Type 8 or Code Type C0).
+    /// </summary>
+    class EndConditionalBlock
+    {
+        public static void Emit(byte[] instruction, CompilationContext context)
+        {
+            // 20000000
+
+            // Use the conditional begin instruction stored in the stack.
+            instruction = context.CurrentBlock.BaseInstruction;
+            CodeType codeType = InstructionHelper.GetCodeType(instruction);
+
+            // Pop the current block of operations from the stack so control instructions
+            // for the conditional can be emitted in the upper block.
+            IEnumerable<IOperation> operations = context.CurrentOperations;
+            context.BlockStack.Pop();
+
+            ICondition condition;
+
+            switch (codeType)
+            {
+                case CodeType.BeginMemoryConditionalBlock:
+                    condition = MemoryConditional.Emit(instruction, context);
+                    break;
+                case CodeType.BeginKeypressConditionalBlock:
+                    condition = KeyPressConditional.Emit(instruction, context);
+                    break;
+                case CodeType.BeginRegisterConditionalBlock:
+                    condition = RegisterConditional.Emit(instruction, context);
+                    break;
+                default:
+                    throw new TamperCompilationException($"Conditional end does not match code type {codeType} in Atmosphere cheat");
+            }
+
+            // Create a conditional block with the current operations and nest it in the upper
+            // block of the stack.
+
+            IfBlock block = new IfBlock(condition, operations);
+            context.CurrentOperations.Add(block);
+        }
+    }
+}