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Code Issues Activity

Updated instruction handlers to use Type and StructuredOperands instead of Mnemonic and Operands

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This commit is contained in:
bird_egop
2025-04-14 22:08:50 +03:00
parent c516e063e7
commit 685eeda03d
136 changed files with 3694 additions and 2584 deletions
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44
X86Disassembler/X86/Handlers/Xor/XorImmWithRm8Handler.cs
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@@ -1,3 +1,5 @@
using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.Xor;
/// <summary>
@@ -8,11 +10,9 @@ public class XorImmWithRm8Handler : InstructionHandler
/// <summary>
/// Initializes a new instance of the XorImmWithRm8Handler class
/// </summary>
/// <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 XorImmWithRm8Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
public XorImmWithRm8Handler(InstructionDecoder decoder)
: base(decoder)
{
}
@@ -30,7 +30,7 @@ public class XorImmWithRm8Handler : InstructionHandler
if (!Decoder.CanReadByte())
return false;
byte modRM = CodeBuffer[Decoder.GetPosition()];
byte modRM = Decoder.PeakByte();
byte reg = (byte)((modRM & 0x38) >> 3);
return reg == 6; // 6 = XOR
@@ -44,8 +44,8 @@ public class XorImmWithRm8Handler : InstructionHandler
/// <returns>True if the instruction was successfully decoded</returns>
public override bool Decode(byte opcode, Instruction instruction)
{
// Set the mnemonic
instruction.Mnemonic = "xor";
// Set the instruction type
instruction.Type = InstructionType.Xor;
if (!Decoder.CanReadByte())
{
@@ -53,19 +53,13 @@ public class XorImmWithRm8Handler : InstructionHandler
}
// Read the ModR/M byte
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
// For XOR r/m8, imm8 (0x80 /6):
// - The r/m field with mod specifies the destination operand (register or memory)
// - The immediate value is the source operand
var (mod, reg, rm, destinationOperand) = ModRMDecoder.ReadModRM();
// If mod == 3, then the r/m field specifies a register
if (mod == 3)
{
// Get the r/m register name (8-bit)
destOperand = ModRMDecoder.GetRegisterName(rm, 8);
}
else
{
// Replace "dword ptr" with "byte ptr" to indicate 8-bit operation
destOperand = destOperand.Replace("dword ptr", "byte ptr");
}
// Adjust the operand size to 8-bit
destinationOperand.Size = 8;
// Read the immediate value
if (!Decoder.CanReadByte())
@@ -76,11 +70,15 @@ public class XorImmWithRm8Handler : InstructionHandler
// Read the immediate value
byte imm8 = Decoder.ReadByte();
// Format the immediate value
string immStr = $"0x{imm8:X2}";
// Create the source immediate operand
var sourceOperand = OperandFactory.CreateImmediateOperand(imm8, 8);
// Set the operands
instruction.Operands = $"{destOperand}, {immStr}";
// Set the structured operands
instruction.StructuredOperands =
[
destinationOperand,
sourceOperand
];
return true;
}