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Code Issues Releases Activity

Removed special case check for 0x83 in OrRm8R8Handler to avoid introducing special cases in general solutions

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bird_egop
2025-04-14 00:30:53 +03:00
parent 243789892d
commit 53696a9f1c
3 changed files with 10 additions and 42 deletions
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10
X86Disassembler/X86/Handlers/Jump/JmpRel32Handler.cs
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@ -15,7 +15,7 @@ public class JmpRel32Handler : InstructionHandler
: base(codeBuffer, decoder, length)
{
}
/// <summary>
/// Checks if this handler can decode the given opcode
/// </summary>
@ -25,7 +25,7 @@ public class JmpRel32Handler : InstructionHandler
{
return opcode == 0xE9;
}
/// <summary>
/// Decodes a JMP rel32 instruction
/// </summary>
@ -37,7 +37,7 @@ public class JmpRel32Handler : InstructionHandler
// Set the mnemonic
instruction.Mnemonic = "jmp";
// Check if we have enough bytes for the offset
// Check if we have enough bytes for the offset (4 bytes)
int position = Decoder.GetPosition();
if (position + 4 > Length)
{
@ -45,13 +45,13 @@ public class JmpRel32Handler : InstructionHandler
}
// Read the offset and calculate target address
int offset = (int)Decoder.ReadUInt32();
uint offset = Decoder.ReadUInt32();
// Calculate target address (instruction address + instruction length + offset)
// For JMP rel32, the instruction is 5 bytes: opcode (1 byte) + offset (4 bytes)
uint targetAddress = (uint)(instruction.Address + 5 + offset);
// Format the target address
// Set the operands
instruction.Operands = $"0x{targetAddress:X8}";
return true;