3145 do_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, unsigned long sp)  in do_sigaltstack()  argument
3154 	if (uss) {  in do_sigaltstack()
3160 		if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))  in do_sigaltstack()
3162 		error = __get_user(ss_sp, &uss->ss_sp) |  in do_sigaltstack()
3163 			__get_user(ss_flags, &uss->ss_flags) |  in do_sigaltstack()
3164 			__get_user(ss_size, &uss->ss_size);  in do_sigaltstack()
3209 SYSCALL_DEFINE2(sigaltstack,const stack_t __user *,uss, stack_t __user *,uoss)  in SYSCALL_DEFINE2()  argument
3211 	return do_sigaltstack(uss, uoss, current_user_stack_pointer());  in SYSCALL_DEFINE2()
3214 int restore_altstack(const stack_t __user *uss)  in restore_altstack()  argument
3216 	int err = do_sigaltstack(uss, NULL, current_user_stack_pointer());  in restore_altstack()
3221 int __save_altstack(stack_t __user *uss, unsigned long sp)  in __save_altstack()  argument
3224 	return  __put_user((void __user *)t->sas_ss_sp, &uss->ss_sp) |  in __save_altstack()
3225 		__put_user(sas_ss_flags(sp), &uss->ss_flags) |  in __save_altstack()
3226 		__put_user(t->sas_ss_size, &uss->ss_size);  in __save_altstack()
3234 	stack_t uss, uoss;  in COMPAT_SYSCALL_DEFINE2()  local
3241 		memset(&uss, 0, sizeof(stack_t));  in COMPAT_SYSCALL_DEFINE2()
3244 		uss.ss_sp = compat_ptr(uss32.ss_sp);  in COMPAT_SYSCALL_DEFINE2()
3245 		uss.ss_flags = uss32.ss_flags;  in COMPAT_SYSCALL_DEFINE2()
3246 		uss.ss_size = uss32.ss_size;  in COMPAT_SYSCALL_DEFINE2()
3250 	ret = do_sigaltstack((stack_t __force __user *) (uss_ptr ? &uss : NULL),  in COMPAT_SYSCALL_DEFINE2()
3264 int compat_restore_altstack(const compat_stack_t __user *uss)  in compat_restore_altstack()  argument
3266 	int err = compat_sys_sigaltstack(uss, NULL);  in compat_restore_altstack()
3271 int __compat_save_altstack(compat_stack_t __user *uss, unsigned long sp)  in __compat_save_altstack()  argument
3274 	return  __put_user(ptr_to_compat((void __user *)t->sas_ss_sp), &uss->ss_sp) |  in __compat_save_altstack()
3275 		__put_user(sas_ss_flags(sp), &uss->ss_flags) |  in __compat_save_altstack()
3276 		__put_user(t->sas_ss_size, &uss->ss_size);  in __compat_save_altstack()