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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)
{
return source switch
{
// Memory address is relative to the code start.
MemoryRegion.NSO => context.ExeAddress,
// Memory address is relative to the heap.
MemoryRegion.Heap => context.HeapAddress,
// Memory address is relative to the alias region.
MemoryRegion.Alias => context.AliasAddress,
// Memory address is relative to the asrl region, which matches the code region.
MemoryRegion.Asrl => context.AslrAddress,
_ => 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(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(offsetImmediate);
Value<ulong> finalAddressValue = new(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(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(offsetImmediate);
Value<ulong> finalOffsetValue = new(0);
EmitAdd(finalOffsetValue, offsetRegister, offsetImmediateValue, context);
Value<ulong> finalAddressValue = new(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);
}
}
}
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