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

Andi Kleen wrote:

On Sunday 27 August 2006 19:20, Jeremy Fitzhardinge wrote:

Andi Kleen wrote:

+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.

Not so much a bug as a misfeature. They changed the meaning of "movw"and "movl" on segment registers between versions.


Either way, just "mov" should work.

	-hpa

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References:
- [PATCH RFC 0/6] Implement per-processor data areas for i386.
  - From: Jeremy Fitzhardinge <[email protected]>
- Re: [PATCH RFC 3/6] Use %gs as the PDA base-segment in the kernel.
  - From: Andi Kleen <[email protected]>
- Re: [PATCH RFC 3/6] Use %gs as the PDA base-segment in the kernel.
  - From: Jeremy Fitzhardinge <[email protected]>
- Re: [PATCH RFC 3/6] Use %gs as the PDA base-segment in the kernel.
  - From: Andi Kleen <[email protected]>

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