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Code Issues Releases 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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42
X86Disassembler/X86/Handlers/Sub/SubImmFromRm8Handler.cs
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@ -1,3 +1,5 @@
using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.Sub;
/// <summary>
@ -8,11 +10,9 @@ public class SubImmFromRm8Handler : InstructionHandler
/// <summary>
/// Initializes a new instance of the SubImmFromRm8Handler 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 SubImmFromRm8Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
public SubImmFromRm8Handler(InstructionDecoder decoder)
: base(decoder)
{
}
@ -30,7 +30,7 @@ public class SubImmFromRm8Handler : InstructionHandler
if (!Decoder.CanReadByte())
return false;
byte modRM = CodeBuffer[Decoder.GetPosition()];
byte modRM = Decoder.PeakByte();
byte reg = (byte) ((modRM & 0x38) >> 3);
return reg == 5; // 5 = SUB
@ -44,11 +44,14 @@ public class SubImmFromRm8Handler : InstructionHandler
/// <returns>True if the instruction was successfully decoded</returns>
public override bool Decode(byte opcode, Instruction instruction)
{
// Set the mnemonic
instruction.Mnemonic = "sub";
// Set the instruction type
instruction.Type = InstructionType.Sub;
// Extract the fields from the ModR/M byte
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
var (mod, reg, rm, destinationOperand) = ModRMDecoder.ReadModRM();
// Ensure the destination operand has the correct size (8-bit)
destinationOperand.Size = 8;
// Read the immediate byte
if (!Decoder.CanReadByte())
@ -57,19 +60,16 @@ public class SubImmFromRm8Handler : InstructionHandler
}
byte imm8 = Decoder.ReadByte();
// Set the instruction information
// For mod == 3, the operand is a register
if (mod == 3)
{
string rmRegName = ModRMDecoder.GetRegisterName(rm, 8);
instruction.Operands = $"{rmRegName}, 0x{imm8:X2}";
}
else // Memory operand
{
// Get the memory operand string
instruction.Operands = $"byte ptr {destOperand}, 0x{imm8:X2}";
}
// Create the source immediate operand
var sourceOperand = OperandFactory.CreateImmediateOperand(imm8, 8);
// Set the structured operands
instruction.StructuredOperands =
[
destinationOperand,
sourceOperand
];
return true;
}