Ryujinx/Ryujinx.HLE/HOS/Tamper/CodeEmitters/ReadOrWriteStaticRegister.cs
Caian Benedicto 0c1ea1212a
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
2021-03-27 15:12:05 +01:00

48 lines
1.7 KiB
C#

using Ryujinx.HLE.HOS.Tamper.Operations;
namespace Ryujinx.HLE.HOS.Tamper.CodeEmitters
{
/// <summary>
/// Code type 0xC3 reads or writes a static register with a given register.
/// NOTE: Registers are saved and restored to a different set of registers than the ones used
/// for the other opcodes (Static Registers).
/// </summary>
class ReadOrWriteStaticRegister
{
private const int StaticRegisterIndex = 5;
private const int RegisterIndex = 7;
private const byte FirstWriteRegister = 0x80;
private const int StaticRegisterSize = 2;
public static void Emit(byte[] instruction, CompilationContext context)
{
// C3000XXx
// XX: Static register index, 0x00 to 0x7F for reading or 0x80 to 0xFF for writing.
// x: Register index.
ulong staticRegisterIndex = InstructionHelper.GetImmediate(instruction, StaticRegisterIndex, StaticRegisterSize);
Register register = context.GetRegister(instruction[RegisterIndex]);
IOperand sourceRegister;
IOperand destinationRegister;
if (staticRegisterIndex < FirstWriteRegister)
{
// Read from static register.
sourceRegister = context.GetStaticRegister((byte)staticRegisterIndex);
destinationRegister = register;
}
else
{
// Write to static register.
sourceRegister = register;
destinationRegister = context.GetStaticRegister((byte)(staticRegisterIndex - FirstWriteRegister));
}
context.CurrentOperations.Add(new OpMov<ulong>(destinationRegister, sourceRegister));
}
}
}