taglinefilesource code
esp0139include/linux/sched.hunsigned long  esp0;
esp0168kernel/fork.cp->tss.esp0 = p->kernel_stack_page + PAGE_SIZE;
esp057kernel/ptrace.cstack = (unsigned char *)task->tss.esp0;
esp073kernel/ptrace.cstack = (unsigned char *) task->tss.esp0;
esp0139kernel/sys.cstack = current->tss.esp0;
esp0140kernel/sys.ccurrent->tss.esp0 = current->saved_kernel_stack;
esp0188kernel/sys.ccurrent->saved_kernel_stack = current->tss.esp0;
esp0189kernel/sys.ccurrent->tss.esp0 = (unsigned long) pt_regs;