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Rev 2927 Rev 3535
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 *
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 *
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 * THREAD is locked and interrupts are disabled.
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 * THREAD is locked and interrupts are disabled.
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 */
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 */
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void before_thread_runs_arch(void)
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void before_thread_runs_arch(void)
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{
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{
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    CPU->arch.tss->esp0 = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE -
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    uintptr_t kstk = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE -
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        SP_DELTA];
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        SP_DELTA];
- 
 
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- 
 
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    /* Set kernel stack for CP3 -> CPL0 switch via SYSENTER */
- 
 
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    write_msr(IA32_MSR_SYSENTER_ESP, kstk);
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- 
 
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    /* Set kernel stack for CPL3 -> CPL0 switch via interrupt */
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    CPU->arch.tss->esp0 = kstk;
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    CPU->arch.tss->ss0 = selector(KDATA_DES);
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    CPU->arch.tss->ss0 = selector(KDATA_DES);
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    /* Set up TLS in GS register */
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    /* Set up TLS in GS register */
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    set_tls_desc(THREAD->arch.tls);
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    set_tls_desc(THREAD->arch.tls);
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