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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 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
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    CPU->arch.tss->esp0 = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
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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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