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nice big refactor

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This commit is contained in:
bird_egop
2025-04-13 23:06:52 +03:00
parent 59df064ca4
commit 11a2cfada4
92 changed files with 981 additions and 1509 deletions
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46
X86Disassembler/X86/Handlers/Test/TestImmWithRm32Handler.cs
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@ -11,11 +11,11 @@ public class TestImmWithRm32Handler : InstructionHandler
/// <param name="codeBuffer">The buffer containing the code to decode</param>
/// <param name="decoder">The instruction decoder that owns this handler</param>
/// <param name="length">The length of the buffer</param>
public TestImmWithRm32Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
public TestImmWithRm32Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
{
}
/// <summary>
/// Checks if this handler can decode the given opcode
/// </summary>
@ -27,7 +27,7 @@ public class TestImmWithRm32Handler : InstructionHandler
// The reg field check (for TEST operation) will be done in the Decode method
return opcode == 0xF7;
}
/// <summary>
/// Decodes a TEST r/m32, imm32 instruction
/// </summary>
@ -37,58 +37,44 @@ public class TestImmWithRm32Handler : InstructionHandler
public override bool Decode(byte opcode, Instruction instruction)
{
int position = Decoder.GetPosition();
if (position >= Length)
{
return false;
}
// Read the ModR/M byte
byte modRM = CodeBuffer[position++];
// Extract the fields from the ModR/M byte
byte mod = (byte)((modRM & 0xC0) >> 6);
byte reg = (byte)((modRM & 0x38) >> 3); // Should be 0 for TEST
byte rm = (byte)(modRM & 0x07);
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
// Check if the reg field is 0 (TEST operation)
if (reg != 0)
{
return false; // Not a TEST instruction
}
// Set the mnemonic
instruction.Mnemonic = "test";
Decoder.SetPosition(position);
// Get the operand based on the addressing mode
string destOperand;
// For direct register addressing (mod == 3), the r/m field specifies a register
if (mod == 3)
{
destOperand = GetRegister32(rm);
destOperand = ModRMDecoder.GetRegisterName(rm, 32);
}
else
{
// Use the ModR/M decoder for memory addressing
destOperand = ModRMDecoder.DecodeModRM(mod, rm, false);
}
position = Decoder.GetPosition();
// Read the immediate value
if (position + 3 >= Length)
{
return false;
}
// Read the immediate value using BitConverter
uint imm32 = BitConverter.ToUInt32(CodeBuffer, position);
Decoder.SetPosition(position + 4);
// Set the operands
instruction.Operands = $"{destOperand}, 0x{imm32:X8}";
return true;
}
}
}