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[SOFT386]
Implement far jumps. svn path=/branches/ntvdm/; revision=60679
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@ -5690,10 +5690,63 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeJmp)
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SOFT386_OPCODE_HANDLER(Soft386OpcodeJmpAbs)
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SOFT386_OPCODE_HANDLER(Soft386OpcodeJmpAbs)
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{
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{
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// TODO: NOT IMPLEMENTED
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USHORT Segment = 0;
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UNIMPLEMENTED;
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ULONG Offset = 0;
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BOOLEAN Size = State->SegmentRegs[SOFT386_REG_CS].Size;
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/* Make sure this is the right instruction */
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ASSERT(Opcode == 0xEA);
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if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
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{
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/* The OPSIZE prefix toggles the size */
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Size = !Size;
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}
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if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
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{
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/* Invalid prefix */
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Soft386Exception(State, SOFT386_EXCEPTION_UD);
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return FALSE;
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return FALSE;
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}
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/* Fetch the offset */
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if (Size)
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{
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if (!Soft386FetchDword(State, &Offset))
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{
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/* Exception occurred */
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return FALSE;
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}
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}
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else
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{
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if (!Soft386FetchWord(State, (PUSHORT)&Offset))
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{
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/* Exception occurred */
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return FALSE;
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}
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}
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/* Fetch the segment */
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if (!Soft386FetchWord(State, &Segment))
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{
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/* Exception occurred */
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return FALSE;
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}
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/* Load the new CS */
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if (!Soft386LoadSegment(State, SOFT386_REG_CS, Segment))
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{
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/* Exception occurred */
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return FALSE;
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}
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/* Load new (E)IP */
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if (Size) State->InstPtr.Long = Offset;
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else State->InstPtr.LowWord = LOWORD(Offset);
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return TRUE;
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}
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}
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SOFT386_OPCODE_HANDLER(Soft386OpcodeMovAlOffset)
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SOFT386_OPCODE_HANDLER(Soft386OpcodeMovAlOffset)
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