1110 static void setup_ksp_vsid(struct task_struct *p, unsigned long sp)  in setup_ksp_vsid()  argument
1117 		sp_vsid = get_kernel_vsid(sp, MMU_SEGSIZE_1T)  in setup_ksp_vsid()
1120 		sp_vsid = get_kernel_vsid(sp, MMU_SEGSIZE_256M)  in setup_ksp_vsid()
1141 	unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;  in copy_thread()  local
1144 	sp -= sizeof(struct pt_regs);  in copy_thread()
1145 	childregs = (struct pt_regs *) sp;  in copy_thread()
1150 		childregs->gpr[1] = sp + sizeof(struct pt_regs);  in copy_thread()
1182 	sp -= STACK_FRAME_OVERHEAD;  in copy_thread()
1192 	((unsigned long *)sp)[0] = 0;  in copy_thread()
1193 	sp -= sizeof(struct pt_regs);  in copy_thread()
1194 	kregs = (struct pt_regs *) sp;  in copy_thread()
1195 	sp -= STACK_FRAME_OVERHEAD;  in copy_thread()
1196 	p->thread.ksp = sp;  in copy_thread()
1210 	setup_ksp_vsid(p, sp);  in copy_thread()
1227 void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)  in start_thread()  argument
1247 	regs->gpr[1] = sp;  in start_thread()
1475 static inline int valid_irq_stack(unsigned long sp, struct task_struct *p,  in valid_irq_stack()  argument
1487 		if (sp >= stack_page + sizeof(struct thread_struct)  in valid_irq_stack()
1488 		    && sp <= stack_page + THREAD_SIZE - nbytes)  in valid_irq_stack()
1492 		if (sp >= stack_page + sizeof(struct thread_struct)  in valid_irq_stack()
1493 		    && sp <= stack_page + THREAD_SIZE - nbytes)  in valid_irq_stack()
1499 int validate_sp(unsigned long sp, struct task_struct *p,  in validate_sp()  argument
1504 	if (sp >= stack_page + sizeof(struct thread_struct)  in validate_sp()
1505 	    && sp <= stack_page + THREAD_SIZE - nbytes)  in validate_sp()
1508 	return valid_irq_stack(sp, p, nbytes);  in validate_sp()
1515 	unsigned long ip, sp;  in get_wchan()  local
1521 	sp = p->thread.ksp;  in get_wchan()
1522 	if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD))  in get_wchan()
1526 		sp = *(unsigned long *)sp;  in get_wchan()
1527 		if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD))  in get_wchan()
1530 			ip = ((unsigned long *)sp)[STACK_FRAME_LR_SAVE];  in get_wchan()
1542 	unsigned long sp, ip, lr, newsp;  in show_stack()  local
1551 	sp = (unsigned long) stack;  in show_stack()
1554 	if (sp == 0) {  in show_stack()
1556 			sp = current_stack_pointer();  in show_stack()
1558 			sp = tsk->thread.ksp;  in show_stack()
1564 		if (!validate_sp(sp, tsk, STACK_FRAME_OVERHEAD))  in show_stack()
1567 		stack = (unsigned long *) sp;  in show_stack()
1571 			printk("["REG"] ["REG"] %pS", sp, ip, (void *)ip);  in show_stack()
1589 		if (validate_sp(sp, tsk, STACK_INT_FRAME_SIZE)  in show_stack()
1592 				(sp + STACK_FRAME_OVERHEAD);  in show_stack()
1599 		sp = newsp;  in show_stack()
1631 unsigned long arch_align_stack(unsigned long sp)  in arch_align_stack()  argument
1634 		sp -= get_random_int() & ~PAGE_MASK;  in arch_align_stack()
1635 	return sp & ~0xf;  in arch_align_stack()