Re: [PATCH RFC 3/6] Use %gs as the PDA base-segment in the kernel.

Jan Engelhardt
2006-08-27T20:09:07Z

>> >> +1: movw GS(%esp), %gs
>> >
>> > movl is recommended in 32bit mode
>>
>> arch/i386/kernel/entry.S: Assembler messages:
>> arch/i386/kernel/entry.S:334: Error: suffix or operands invalid for `mov'
>
>Looks like a gas bug to me.

So the suffixing (MOVW vs MOVL) does not depend on the source operand?
%gs is only 16 bit wide so MOVW seems reasonable. If the destination
operand was a 32 bit location, something like MOVZX would be needed, would
not it?

Jan Engelhardt
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