Re: [PATCH] x86_64: Reload CS when startup_64 is used.
From: Eric W. Biederman
Date: Tue Aug 22 2006 - 05:18:43 EST
Andi Kleen <ak@xxxxxxx> writes:
> On Tue, 22 Aug 2006 02:37:44 -0600
> ebiederm@xxxxxxxxxxxx (Eric W. Biederman) wrote:
>> In long mode the %cs is largely a relic. However there are a few cases
>> like lret
> You mean iret?
>> + * 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
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