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

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* 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
This commit is contained in:
Caian Benedicto 2021-03-27 11:12:05 -03:00 • committed by GitHub
parent a5d5ca0635
commit 0c1ea1212a
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71 changed files with 2793 additions and 5 deletions
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Ryujinx.HLE/HOS/Tamper/CodeEmitters/StoreConstantToMemory.cs Normal file
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using Ryujinx.HLE.Exceptions;
using Ryujinx.HLE.HOS.Tamper.Operations;
namespace Ryujinx.HLE.HOS.Tamper.CodeEmitters
{
/// <summary>
/// Code type 6 allows writing a fixed value to a memory address specified by a register.
/// </summary>
class StoreConstantToMemory
{
private const int OperationWidthIndex = 1;
private const int AddressRegisterIndex = 3;
private const int IncrementAddressRegisterIndex = 4;
private const int UseOffsetRegisterIndex = 5;
private const int OffsetRegisterIndex = 6;
private const int ValueImmediateIndex = 8;
private const int ValueImmediateSize = 16;
public static void Emit(byte[] instruction, CompilationContext context)
{
// 6T0RIor0 VVVVVVVV VVVVVVVV
// T: Width of memory write(1, 2, 4, or 8 bytes).
// R: Register used as base memory address.
// I: Increment register flag(0 = do not increment R, 1 = increment R by T).
// o: Offset register enable flag(0 = do not add r to address, 1 = add r to address).
// r: Register used as offset when o is 1.
// V: Value to write to memory.
byte operationWidth = instruction[OperationWidthIndex];
Register sourceRegister = context.GetRegister(instruction[AddressRegisterIndex]);
byte incrementAddressRegister = instruction[IncrementAddressRegisterIndex];
byte useOffsetRegister = instruction[UseOffsetRegisterIndex];
ulong immediate = InstructionHelper.GetImmediate(instruction, ValueImmediateIndex, ValueImmediateSize);
Value<ulong> storeValue = new Value<ulong>(immediate);
Pointer destinationMemory;
switch (useOffsetRegister)
{
case 0:
// Don't offset the address register by another register.
destinationMemory = MemoryHelper.EmitPointer(sourceRegister, context);
break;
case 1:
// Replace the source address by the sum of the base and offset registers.
Register offsetRegister = context.GetRegister(instruction[OffsetRegisterIndex]);
destinationMemory = MemoryHelper.EmitPointer(sourceRegister, offsetRegister, context);
break;
default:
throw new TamperCompilationException($"Invalid offset mode {useOffsetRegister} in Atmosphere cheat");
}
InstructionHelper.EmitMov(operationWidth, context, destinationMemory, storeValue);
switch (incrementAddressRegister)
{
case 0:
// Don't increment the address register by operationWidth.
break;
case 1:
// Increment the address register by operationWidth.
IOperand increment = new Value<ulong>(operationWidth);
context.CurrentOperations.Add(new OpAdd<ulong>(sourceRegister, sourceRegister, increment));
break;
default:
throw new TamperCompilationException($"Invalid increment mode {incrementAddressRegister} in Atmosphere cheat");
}
}
}
}