Re: [PATCH] x86_64: Reload CS when startup_64 is used.

Andi Kleen <[email protected]> writes:

> On Tue, 22 Aug 2006 02:37:44 -0600
> [email protected] (Eric W. Biederman) wrote:
>
>> 
>> In long mode the %cs is largely a relic.  However there are a few cases
>> like lret 
>
> You mean iret?

Yes, sorry.

>
>> +	 * jump.  In addition we need to ensure %cs is set so we make this
>> +	 * a far return.	
>>  	 */
>>  	movq	initial_code(%rip),%rax
>> -	jmp	*%rax
>> +	pushq	$__KERNEL_CS
>> +	pushq	%rax
>> +	lretq
>
> Ok merged thanks
>
> -Andi
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---

• References:
  • [PATCH][RFC] x86_64: Reload CS when startup_64 is used.
    • From: Magnus Damm <[email protected]>
  • Re: [PATCH][RFC] x86_64: Reload CS when startup_64 is used.
    • From: Magnus Damm <[email protected]>
  • Re: [PATCH][RFC] x86_64: Reload CS when startup_64 is used.
    • From: [email protected] (Eric W. Biederman)
  • Re: [PATCH][RFC] x86_64: Reload CS when startup_64 is used.
    • From: Andi Kleen <[email protected]>
  • [PATCH] x86_64: Reload CS when startup_64 is used.
    • From: [email protected] (Eric W. Biederman)
  • Re: [PATCH] x86_64: Reload CS when startup_64 is used.
    • From: Andi Kleen <[email protected]>

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