forked from Mirror/Ryujinx
0c1ea1212a
* 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
45 lines
2 KiB
C#
45 lines
2 KiB
C#
using Ryujinx.HLE.HOS.Tamper.Conditions;
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namespace Ryujinx.HLE.HOS.Tamper.CodeEmitters
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{
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/// <summary>
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/// Code type 1 performs a comparison of the contents of memory to a static value.
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/// If the condition is not met, all instructions until the appropriate conditional block terminator
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/// are skipped.
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/// </summary>
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class MemoryConditional
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{
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private const int OperationWidthIndex = 1;
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private const int MemoryRegionIndex = 2;
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private const int ComparisonTypeIndex = 3;
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private const int OffsetImmediateIndex = 6;
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private const int ValueImmediateIndex = 16;
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private const int OffsetImmediateSize = 10;
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private const int ValueImmediateSize4 = 8;
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private const int ValueImmediateSize8 = 16;
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public static ICondition Emit(byte[] instruction, CompilationContext context)
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{
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// 1TMC00AA AAAAAAAA VVVVVVVV (VVVVVVVV)
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// T: Width of memory write (1, 2, 4, or 8 bytes).
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// M: Memory region to write to (0 = Main NSO, 1 = Heap).
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// C: Condition to use, see below.
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// A: Immediate offset to use from memory region base.
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// V: Value to compare to.
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byte operationWidth = instruction[OperationWidthIndex];
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MemoryRegion memoryRegion = (MemoryRegion)instruction[MemoryRegionIndex];
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Comparison comparison = (Comparison)instruction[ComparisonTypeIndex];
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ulong address = InstructionHelper.GetImmediate(instruction, OffsetImmediateIndex, OffsetImmediateSize);
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Pointer sourceMemory = MemoryHelper.EmitPointer(memoryRegion, address, context);
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int valueSize = operationWidth <= 4 ? ValueImmediateSize4 : ValueImmediateSize8;
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ulong value = InstructionHelper.GetImmediate(instruction, ValueImmediateIndex, valueSize);
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Value<ulong> compareToValue = new Value<ulong>(value);
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return InstructionHelper.CreateCondition(comparison, operationWidth, sourceMemory, compareToValue);
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}
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}
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}
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