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Code Issues Releases Activity

Implemented SBB instruction handlers for the x86 disassembler

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bird_egop
2025-04-17 21:49:44 +03:00
parent a62812f71c
commit 33dc0b0fa2
6 changed files with 406 additions and 1 deletions
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22
X86Disassembler/X86/Handlers/InstructionHandlerFactory.cs
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@ -100,9 +100,20 @@ public class InstructionHandlerFactory
/// </summary>
private void RegisterSbbHandlers()
{
// SBB immediate handlers
// SBB immediate handlers for 8-bit operands
_handlers.Add(new SbbImmFromRm8Handler(_decoder)); // SBB r/m8, imm8 (opcode 80 /3)
_handlers.Add(new SbbAlImmHandler(_decoder)); // SBB AL, imm8 (opcode 1C)
// SBB immediate handlers for 16-bit operands (with 0x66 prefix)
_handlers.Add(new SbbImmFromRm16Handler(_decoder)); // SBB r/m16, imm16 (opcode 81 /3 with 0x66 prefix)
_handlers.Add(new SbbImmFromRm16SignExtendedHandler(_decoder)); // SBB r/m16, imm8 (opcode 83 /3 with 0x66 prefix)
// SBB immediate handlers for 32-bit operands
_handlers.Add(new SbbImmFromRm32Handler(_decoder)); // SBB r/m32, imm32 (opcode 81 /3)
_handlers.Add(new SbbImmFromRm32SignExtendedHandler(_decoder)); // SBB r/m32, imm8 (opcode 83 /3)
// SBB accumulator handlers
_handlers.Add(new SbbAccumulatorImmHandler(_decoder)); // SBB AX/EAX, imm16/32 (opcode 1D)
}
/// <summary>
@ -140,6 +151,15 @@ public class InstructionHandlerFactory
// Add Return handlers
_handlers.Add(new RetHandler(_decoder));
_handlers.Add(new RetImmHandler(_decoder));
// Add Far Return handlers
// 16-bit handlers with operand size prefix (must come first)
_handlers.Add(new Retf16Handler(_decoder)); // RETF (16-bit) (opcode 0xCB with 0x66 prefix)
_handlers.Add(new RetfImm16Handler(_decoder)); // RETF imm16 (16-bit) (opcode 0xCA with 0x66 prefix)
// 32-bit handlers (default)
_handlers.Add(new RetfHandler(_decoder)); // RETF (32-bit) (opcode 0xCB)
_handlers.Add(new RetfImmHandler(_decoder)); // RETF imm16 (32-bit) (opcode 0xCA)
}
/// <summary>