dmnt: implement debug log opcode

stratosphere/dmnt/source/dmnt_cheat_vm.hpp

@@ -49,6 +49,9 @@ enum CheatVmOpcodeType : u32 {
     /* This is a meta entry, and not a real opcode. */
     /* This is to facilitate multi-nybble instruction decoding. */
     CheatVmOpcodeType_DoubleExtendedWidth = 0xF0,
+    
+    /* Double-extended width opcodes. */
+    CheatVmOpcodeType_DebugLog = 0xFFF,
 };
 
 enum MemoryAccessType : u32 {
@@ -106,6 +109,14 @@ enum SaveRestoreRegisterOpType : u32 {
     SaveRestoreRegisterOpType_ClearRegs = 3,
 };
 
+enum DebugLogValueType : u32 {
+    DebugLogValueType_MemoryRelAddr = 0,
+    DebugLogValueType_MemoryOfsReg = 1,
+    DebugLogValueType_RegisterRelAddr = 2,
+    DebugLogValueType_RegisterOfsReg = 3,
+    DebugLogValueType_RegisterValue = 4,
+};
+
 union VmInt {
     u8  bit8;
     u16 bit16;
@@ -215,6 +226,17 @@ struct SaveRestoreRegisterMaskOpcode {
     bool should_operate[0x10];
 };
 
+struct DebugLogOpcode {
+    u32 bit_width;
+    u32 log_id;
+    DebugLogValueType val_type;
+    MemoryAccessType mem_type;
+    u32 addr_reg_index;
+    u32 val_reg_index;
+    u32 ofs_reg_index;
+    u64 rel_address;
+};
+
 struct CheatVmOpcode {
     CheatVmOpcodeType opcode;
     bool begin_conditional_block;
@@ -233,6 +255,7 @@ struct CheatVmOpcode {
         BeginRegisterConditionalOpcode begin_reg_cond;
         SaveRestoreRegisterOpcode save_restore_reg;
         SaveRestoreRegisterMaskOpcode save_restore_regmask;
+        DebugLogOpcode debug_log;
     };
 };
 
@@ -254,6 +277,9 @@ class DmntCheatVm {
         void SkipConditionalBlock();
         void ResetState();
         
+        /* For implementing the DebugLog opcode. */
+        void DebugLog(u32 log_id, u64 value);
+        
         /* For debugging. These will be IFDEF'd out normally. */
         void OpenDebugLogFile();
         void CloseDebugLogFile();