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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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27
X86Disassembler/X86/Handlers/ArithmeticUnary/DivRm32Handler.cs
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@ -1,3 +1,5 @@
using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.ArithmeticUnary;
/// <summary>
@ -8,11 +10,9 @@ public class DivRm32Handler : InstructionHandler
/// <summary>
/// Initializes a new instance of the DivRm32Handler 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 DivRm32Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
public DivRm32Handler(InstructionDecoder decoder)
: base(decoder)
{
}
@ -27,11 +27,10 @@ public class DivRm32Handler : InstructionHandler
return false;
// Check if the reg field of the ModR/M byte is 6 (DIV)
int position = Decoder.GetPosition();
if (!Decoder.CanReadByte())
return false;
byte modRM = CodeBuffer[position];
byte modRM = Decoder.PeakByte();
byte reg = (byte) ((modRM & 0x38) >> 3);
return reg == 6; // 6 = DIV
@ -45,8 +44,8 @@ public class DivRm32Handler : InstructionHandler
/// <returns>True if the instruction was successfully decoded</returns>
public override bool Decode(byte opcode, Instruction instruction)
{
// Set the mnemonic
instruction.Mnemonic = "div";
// Set the instruction type
instruction.Type = InstructionType.Div;
if (!Decoder.CanReadByte())
{
@ -54,10 +53,16 @@ public class DivRm32Handler : InstructionHandler
}
// Read the ModR/M byte
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
// For DIV r/m32 (0xF7 /6):
// - The r/m field with mod specifies the operand (register or memory)
var (mod, reg, rm, operand) = ModRMDecoder.ReadModRM();
// Set the operands
instruction.Operands = destOperand;
// Set the structured operands
// DIV has only one operand
instruction.StructuredOperands =
[
operand
];
return true;
}

27
X86Disassembler/X86/Handlers/ArithmeticUnary/IdivRm32Handler.cs
View File

@ -1,3 +1,5 @@
using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.ArithmeticUnary;
/// <summary>
@ -8,11 +10,9 @@ public class IdivRm32Handler : InstructionHandler
/// <summary>
/// Initializes a new instance of the IdivRm32Handler 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 IdivRm32Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
public IdivRm32Handler(InstructionDecoder decoder)
: base(decoder)
{
}
@ -27,11 +27,10 @@ public class IdivRm32Handler : InstructionHandler
return false;
// Check if the reg field of the ModR/M byte is 7 (IDIV)
int position = Decoder.GetPosition();
if (!Decoder.CanReadByte())
return false;
byte modRM = CodeBuffer[position];
byte modRM = Decoder.PeakByte();
byte reg = (byte) ((modRM & 0x38) >> 3);
return reg == 7; // 7 = IDIV
@ -45,8 +44,8 @@ public class IdivRm32Handler : InstructionHandler
/// <returns>True if the instruction was successfully decoded</returns>
public override bool Decode(byte opcode, Instruction instruction)
{
// Set the mnemonic
instruction.Mnemonic = "idiv";
// Set the instruction type
instruction.Type = InstructionType.IDiv;
if (!Decoder.CanReadByte())
{
@ -54,10 +53,16 @@ public class IdivRm32Handler : InstructionHandler
}
// Read the ModR/M byte
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
// For IDIV r/m32 (0xF7 /7):
// - The r/m field with mod specifies the operand (register or memory)
var (mod, reg, rm, operand) = ModRMDecoder.ReadModRM();
// Set the operands
instruction.Operands = destOperand;
// Set the structured operands
// IDIV has only one operand
instruction.StructuredOperands =
[
operand
];
return true;
}

26
X86Disassembler/X86/Handlers/ArithmeticUnary/ImulRm32Handler.cs
View File

@ -1,3 +1,5 @@
using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.ArithmeticUnary;
/// <summary>
@ -8,11 +10,9 @@ public class ImulRm32Handler : InstructionHandler
/// <summary>
/// Initializes a new instance of the ImulRm32Handler 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 ImulRm32Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
public ImulRm32Handler(InstructionDecoder decoder)
: base(decoder)
{
}
@ -27,11 +27,10 @@ public class ImulRm32Handler : InstructionHandler
return false;
// Check if the reg field of the ModR/M byte is 5 (IMUL)
int position = Decoder.GetPosition();
if (!Decoder.CanReadByte())
return false;
byte modRM = CodeBuffer[position];
byte modRM = Decoder.PeakByte();
byte reg = (byte) ((modRM & 0x38) >> 3);
return reg == 5; // 5 = IMUL
@ -45,8 +44,8 @@ public class ImulRm32Handler : InstructionHandler
/// <returns>True if the instruction was successfully decoded</returns>
public override bool Decode(byte opcode, Instruction instruction)
{
// Set the mnemonic
instruction.Mnemonic = "imul";
// Set the instruction type
instruction.Type = InstructionType.IMul;
if (!Decoder.CanReadByte())
{
@ -54,10 +53,13 @@ public class ImulRm32Handler : InstructionHandler
}
// Read the ModR/M byte
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
// Set the operands
instruction.Operands = destOperand;
var (mod, reg, rm, operand) = ModRMDecoder.ReadModRM();
// Set the structured operands
instruction.StructuredOperands =
[
operand
];
return true;
}

27
X86Disassembler/X86/Handlers/ArithmeticUnary/MulRm32Handler.cs
View File

@ -1,3 +1,5 @@
using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.ArithmeticUnary;
/// <summary>
@ -8,11 +10,9 @@ public class MulRm32Handler : InstructionHandler
/// <summary>
/// Initializes a new instance of the MulRm32Handler 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 MulRm32Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
public MulRm32Handler(InstructionDecoder decoder)
: base(decoder)
{
}
@ -27,11 +27,10 @@ public class MulRm32Handler : InstructionHandler
return false;
// Check if the reg field of the ModR/M byte is 4 (MUL)
int position = Decoder.GetPosition();
if (!Decoder.CanReadByte())
return false;
byte modRM = CodeBuffer[position];
byte modRM = Decoder.PeakByte();
byte reg = (byte) ((modRM & 0x38) >> 3);
return reg == 4; // 4 = MUL
@ -45,8 +44,8 @@ public class MulRm32Handler : InstructionHandler
/// <returns>True if the instruction was successfully decoded</returns>
public override bool Decode(byte opcode, Instruction instruction)
{
// Set the mnemonic
instruction.Mnemonic = "mul";
// Set the instruction type
instruction.Type = InstructionType.Mul;
if (!Decoder.CanReadByte())
{
@ -54,10 +53,16 @@ public class MulRm32Handler : InstructionHandler
}
// Read the ModR/M byte
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
// For MUL r/m32 (0xF7 /4):
// - The r/m field with mod specifies the operand (register or memory)
var (mod, reg, rm, operand) = ModRMDecoder.ReadModRM();
// Set the operands
instruction.Operands = destOperand;
// Set the structured operands
// MUL has only one operand
instruction.StructuredOperands =
[
operand
];
return true;
}

27
X86Disassembler/X86/Handlers/ArithmeticUnary/NegRm32Handler.cs
View File

@ -1,3 +1,5 @@
using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.ArithmeticUnary;
/// <summary>
@ -8,11 +10,9 @@ public class NegRm32Handler : InstructionHandler
/// <summary>
/// Initializes a new instance of the NegRm32Handler 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 NegRm32Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
public NegRm32Handler(InstructionDecoder decoder)
: base(decoder)
{
}
@ -27,11 +27,10 @@ public class NegRm32Handler : InstructionHandler
return false;
// Check if the reg field of the ModR/M byte is 3 (NEG)
int position = Decoder.GetPosition();
if (!Decoder.CanReadByte())
return false;
byte modRM = CodeBuffer[position];
byte modRM = Decoder.PeakByte();
byte reg = (byte) ((modRM & 0x38) >> 3);
return reg == 3; // 3 = NEG
@ -45,8 +44,8 @@ public class NegRm32Handler : InstructionHandler
/// <returns>True if the instruction was successfully decoded</returns>
public override bool Decode(byte opcode, Instruction instruction)
{
// Set the mnemonic
instruction.Mnemonic = "neg";
// Set the instruction type
instruction.Type = InstructionType.Neg;
if (!Decoder.CanReadByte())
{
@ -54,10 +53,16 @@ public class NegRm32Handler : InstructionHandler
}
// Read the ModR/M byte
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
// For NEG r/m32 (0xF7 /3):
// - The r/m field with mod specifies the operand (register or memory)
var (mod, reg, rm, operand) = ModRMDecoder.ReadModRM();
// Set the operands
instruction.Operands = destOperand;
// Set the structured operands
// NEG has only one operand
instruction.StructuredOperands =
[
operand
];
return true;
}

35
X86Disassembler/X86/Handlers/ArithmeticUnary/NotRm32Handler.cs
View File

@ -1,3 +1,5 @@
using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.ArithmeticUnary;
/// <summary>
@ -8,11 +10,9 @@ public class NotRm32Handler : InstructionHandler
/// <summary>
/// Initializes a new instance of the NotRm32Handler 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 NotRm32Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
: base(codeBuffer, decoder, length)
public NotRm32Handler(InstructionDecoder decoder)
: base(decoder)
{
}
@ -28,11 +28,10 @@ public class NotRm32Handler : InstructionHandler
return false;
// Check if the reg field of the ModR/M byte is 2 (NOT)
int position = Decoder.GetPosition();
if (!Decoder.CanReadByte())
return false;
byte modRM = CodeBuffer[position];
byte modRM = Decoder.PeakByte();
byte reg = (byte) ((modRM & 0x38) >> 3);
return reg == 2; // 2 = NOT
@ -46,13 +45,18 @@ public class NotRm32Handler : InstructionHandler
/// <returns>True if the instruction was successfully decoded</returns>
public override bool Decode(byte opcode, Instruction instruction)
{
// Set the instruction type
instruction.Type = InstructionType.Not;
if (!Decoder.CanReadByte())
{
return false;
}
// Read the ModR/M byte
var (mod, reg, rm, destOperand) = ModRMDecoder.ReadModRM();
// For NOT r/m32 (0xF7 /2):
// - The r/m field with mod specifies the operand (register or memory)
var (mod, reg, rm, operand) = ModRMDecoder.ReadModRM();
// Verify this is a NOT instruction
if (reg != RegisterIndex.C)
@ -60,17 +64,12 @@ public class NotRm32Handler : InstructionHandler
return false;
}
// Set the mnemonic
instruction.Mnemonic = "not";
// For direct register addressing (mod == 3), the r/m field specifies a register
if (mod == 3)
{
destOperand = ModRMDecoder.GetRegisterName(rm, 32);
}
// Set the operands
instruction.Operands = destOperand;
// Set the structured operands
// NOT has only one operand
instruction.StructuredOperands =
[
operand
];
return true;
}