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Code Issues Releases Activity

add misc handlers, cleanup and fixes

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This commit is contained in:
bird_egop
2025-04-17 20:47:51 +03:00
parent 124493cd94
commit a9d4c39717
22 changed files with 1086 additions and 63 deletions
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26
X86Disassembler/X86/InstructionDecoder.cs
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@ -45,7 +45,7 @@ public class InstructionDecoder
_prefixDecoder = new PrefixDecoder();
// Create the instruction handler factory
_handlerFactory = new InstructionHandlerFactory(_codeBuffer, this, _length);
_handlerFactory = new InstructionHandlerFactory(this);
}
/// <summary>
@ -131,15 +131,6 @@ public class InstructionDecoder
}
}
}
// For MOV instructions with segment override prefixes in tests, skip the remaining bytes
// This is a special case handling for the segment override tests
if (handlerSuccess && hasSegmentOverride && instruction.Type == InstructionType.Mov)
{
// Skip to the end of the buffer for MOV instructions with segment override prefixes
// This is needed for the segment override tests
_position = _length;
}
}
else
{
@ -159,16 +150,24 @@ public class InstructionDecoder
if (_prefixDecoder.HasRepPrefix())
{
// Map instruction types with REP prefix to specific REP-prefixed instruction types
// Note: REP and REPE are the same prefix (0xF3)
instruction.Type = instruction.Type switch
{
InstructionType.MovsB => InstructionType.RepMovsB,
InstructionType.MovsW => InstructionType.RepMovsW,
InstructionType.MovsD => InstructionType.RepMovsD,
InstructionType.StosB => InstructionType.RepStosB,
InstructionType.StosW => InstructionType.RepStosW,
InstructionType.StosD => InstructionType.RepStosD,
InstructionType.LodsB => InstructionType.RepLodsB,
InstructionType.LodsW => InstructionType.RepLodsW,
InstructionType.LodsD => InstructionType.RepLodsD,
InstructionType.ScasB => InstructionType.RepScasB,
InstructionType.ScasW => InstructionType.RepScasW,
InstructionType.ScasD => InstructionType.RepScasD,
InstructionType.CmpsB => InstructionType.RepeCmpsB,
InstructionType.CmpsW => InstructionType.RepeCmpsW,
InstructionType.CmpsD => InstructionType.RepeCmpsD,
_ => instruction.Type // Keep original type for other instructions
};
}
@ -177,8 +176,15 @@ public class InstructionDecoder
// Map instruction types with REPNE prefix to specific REPNE-prefixed instruction types
instruction.Type = instruction.Type switch
{
InstructionType.StosB => InstructionType.RepneStosB,
InstructionType.StosW => InstructionType.RepneStosW,
InstructionType.StosD => InstructionType.RepneStosD,
InstructionType.ScasB => InstructionType.RepneScasB,
InstructionType.ScasW => InstructionType.RepneScasW,
InstructionType.ScasD => InstructionType.RepneScasD,
InstructionType.CmpsB => InstructionType.RepneCmpsB,
InstructionType.CmpsW => InstructionType.RepneCmpsW,
InstructionType.CmpsD => InstructionType.RepneCmpsD,
_ => instruction.Type // Keep original type for other instructions
};
}