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以linux 2.6.34版本为例, 以X86_64为例

声明：

DECLARE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss);

初始化：

void __cpuinit cpu_init(void){	struct tss_struct *t;		cpu = stack_smp_processor_id();	t = &per_cpu(init_tss, cpu);		me = current;		*	 * Initialize the per-CPU GDT with the boot GDT,	 * and set up the GDT descriptor:	 */	switch_to_new_gdt(cpu);	loadsegment(fs, 0);	load_idt((const struct desc_ptr *)&idt_descr);	memset(me->thread.tls_array, 0, GDT_ENTRY_TLS_ENTRIES * 8);		load_sp0(t, &current->thread);	set_tss_desc(cpu, t);	load_TR_desc();	load_LDT(&init_mm.context);}

进程切换的时候

__notrace_funcgraph struct task_struct *__switch_to(struct task_struct *prev_p, struct task_struct *next_p){	struct thread_struct *prev = &prev_p->thread;	struct thread_struct *next = &next_p->thread;	int cpu = smp_processor_id();	struct tss_struct *tss = &per_cpu(init_tss, cpu);		/*	 * Reload esp0, LDT and the page table pointer:	 */	load_sp0(tss, next);}

Linux内核TSS的使用

linux内核修炼之利用内核栈切换进程