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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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41
X86Disassembler/X86/Handlers/Test/TestRegMemHandler.cs
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@ -11,11 +11,11 @@ public class TestRegMemHandler : 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 TestRegMemHandler(byte[] codeBuffer, InstructionDecoder decoder, int length)
public TestRegMemHandler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
{
}
/// <summary>
/// Checks if this handler can decode the given opcode
/// </summary>
@ -25,7 +25,7 @@ public class TestRegMemHandler : InstructionHandler
{
return opcode == 0x85;
}
/// <summary>
/// Decodes a TEST r/m32, r32 instruction
/// </summary>
@ -36,30 +36,24 @@ public class TestRegMemHandler : InstructionHandler
{
// Set the mnemonic
instruction.Mnemonic = "test";
int position = Decoder.GetPosition();
if (position >= Length)
{
return false;
}
// Read the ModR/M byte
byte modRM = CodeBuffer[position++];
Decoder.SetPosition(position);
// Extract the fields from the ModR/M byte
byte mod = (byte)((modRM & 0xC0) >> 6);
byte reg = (byte)((modRM & 0x38) >> 3);
byte rm = (byte)(modRM & 0x07);
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
// For direct register addressing (mod == 3), the r/m field specifies a register
if (mod == 3)
{
// Get the register names
string rmReg = GetRegister32(rm);
string regReg = GetRegister32(reg);
string rmReg = ModRMDecoder.GetRegisterName(rm, 32);
string regReg = ModRMDecoder.GetRegisterName(reg, 32);
// Set the operands (TEST r/m32, r32)
// In x86 assembly, the TEST instruction has the operand order r/m32, r32
// According to Ghidra and standard x86 assembly convention, it should be TEST ECX,EAX
@ -68,16 +62,13 @@ public class TestRegMemHandler : InstructionHandler
}
else
{
// Decode the memory operand
string memOperand = ModRMDecoder.DecodeModRM(mod, rm, false);
// Get the register name
string regReg = GetRegister32(reg);
string regReg = ModRMDecoder.GetRegisterName(reg, 32);
// Set the operands (TEST r/m32, r32)
instruction.Operands = $"{memOperand}, {regReg}";
instruction.Operands = $"{destOperand}, {regReg}";
}
return true;
}
}
}