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ryujinx-fork/Ryujinx.HLE/HOS/Tamper/MemoryHelper.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

89 lines
3.7 KiB
C#

using Ryujinx.HLE.Exceptions;
using Ryujinx.HLE.HOS.Tamper.Operations;
namespace Ryujinx.HLE.HOS.Tamper
{
class MemoryHelper
{
public static ulong GetAddressShift(MemoryRegion source, CompilationContext context)
{
switch (source)
{
case MemoryRegion.NSO:
// Memory address is relative to the code start.
return context.ExeAddress;
case MemoryRegion.Heap:
// Memory address is relative to the heap.
return context.HeapAddress;
default:
throw new TamperCompilationException($"Invalid memory source {source} in Atmosphere cheat");
}
}
private static void EmitAdd(Value<ulong> finalValue, IOperand firstOperand, IOperand secondOperand, CompilationContext context)
{
context.CurrentOperations.Add(new OpAdd<ulong>(finalValue, firstOperand, secondOperand));
}
public static Pointer EmitPointer(ulong addressImmediate, CompilationContext context)
{
Value<ulong> addressImmediateValue = new Value<ulong>(addressImmediate);
return new Pointer(addressImmediateValue, context.Process);
}
public static Pointer EmitPointer(Register addressRegister, CompilationContext context)
{
return new Pointer(addressRegister, context.Process);
}
public static Pointer EmitPointer(Register addressRegister, ulong offsetImmediate, CompilationContext context)
{
Value<ulong> offsetImmediateValue = new Value<ulong>(offsetImmediate);
Value<ulong> finalAddressValue = new Value<ulong>(0);
EmitAdd(finalAddressValue, addressRegister, offsetImmediateValue, context);
return new Pointer(finalAddressValue, context.Process);
}
public static Pointer EmitPointer(Register addressRegister, Register offsetRegister, CompilationContext context)
{
Value<ulong> finalAddressValue = new Value<ulong>(0);
EmitAdd(finalAddressValue, addressRegister, offsetRegister, context);
return new Pointer(finalAddressValue, context.Process);
}
public static Pointer EmitPointer(Register addressRegister, Register offsetRegister, ulong offsetImmediate, CompilationContext context)
{
Value<ulong> offsetImmediateValue = new Value<ulong>(offsetImmediate);
Value<ulong> finalOffsetValue = new Value<ulong>(0);
EmitAdd(finalOffsetValue, offsetRegister, offsetImmediateValue, context);
Value<ulong> finalAddressValue = new Value<ulong>(0);
EmitAdd(finalAddressValue, addressRegister, finalOffsetValue, context);
return new Pointer(finalAddressValue, context.Process);
}
public static Pointer EmitPointer(MemoryRegion memoryRegion, ulong offsetImmediate, CompilationContext context)
{
offsetImmediate += GetAddressShift(memoryRegion, context);
return EmitPointer(offsetImmediate, context);
}
public static Pointer EmitPointer(MemoryRegion memoryRegion, Register offsetRegister, CompilationContext context)
{
ulong offsetImmediate = GetAddressShift(memoryRegion, context);
return EmitPointer(offsetRegister, offsetImmediate, context);
}
public static Pointer EmitPointer(MemoryRegion memoryRegion, Register offsetRegister, ulong offsetImmediate, CompilationContext context)
{
offsetImmediate += GetAddressShift(memoryRegion, context);
return EmitPointer(offsetRegister, offsetImmediate, context);
}
}
}