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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->rsp0 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
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    CPU->arch.tss->rsp0 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
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    /* Syscall support - write thread address to hidden part of gs */
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    /* Syscall support - write thread stack address to hidden part of gs */
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    swapgs();
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    swapgs();
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    write_msr(AMD_MSR_GS,
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    write_msr(AMD_MSR_GS,
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          (__u64)&THREAD->kstack);
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          (__u64)&THREAD->kstack);
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    swapgs();
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    swapgs();
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