3091 do_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, unsigned long sp)  in do_sigaltstack()  argument
3100 	if (uss) {  in do_sigaltstack()
3106 		if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))  in do_sigaltstack()
3108 		error = __get_user(ss_sp, &uss->ss_sp) |  in do_sigaltstack()
3109 			__get_user(ss_flags, &uss->ss_flags) |  in do_sigaltstack()
3110 			__get_user(ss_size, &uss->ss_size);  in do_sigaltstack()
3155 SYSCALL_DEFINE2(sigaltstack,const stack_t __user *,uss, stack_t __user *,uoss)  in SYSCALL_DEFINE2()  argument
3157 	return do_sigaltstack(uss, uoss, current_user_stack_pointer());  in SYSCALL_DEFINE2()
3160 int restore_altstack(const stack_t __user *uss)  in restore_altstack()  argument
3162 	int err = do_sigaltstack(uss, NULL, current_user_stack_pointer());  in restore_altstack()
3167 int __save_altstack(stack_t __user *uss, unsigned long sp)  in __save_altstack()  argument
3170 	return  __put_user((void __user *)t->sas_ss_sp, &uss->ss_sp) |  in __save_altstack()
3171 		__put_user(sas_ss_flags(sp), &uss->ss_flags) |  in __save_altstack()
3172 		__put_user(t->sas_ss_size, &uss->ss_size);  in __save_altstack()
3180 	stack_t uss, uoss;  in COMPAT_SYSCALL_DEFINE2()  local
3187 		memset(&uss, 0, sizeof(stack_t));  in COMPAT_SYSCALL_DEFINE2()
3190 		uss.ss_sp = compat_ptr(uss32.ss_sp);  in COMPAT_SYSCALL_DEFINE2()
3191 		uss.ss_flags = uss32.ss_flags;  in COMPAT_SYSCALL_DEFINE2()
3192 		uss.ss_size = uss32.ss_size;  in COMPAT_SYSCALL_DEFINE2()
3196 	ret = do_sigaltstack((stack_t __force __user *) (uss_ptr ? &uss : NULL),  in COMPAT_SYSCALL_DEFINE2()
3210 int compat_restore_altstack(const compat_stack_t __user *uss)  in compat_restore_altstack()  argument
3212 	int err = compat_sys_sigaltstack(uss, NULL);  in compat_restore_altstack()
3217 int __compat_save_altstack(compat_stack_t __user *uss, unsigned long sp)  in __compat_save_altstack()  argument
3220 	return  __put_user(ptr_to_compat((void __user *)t->sas_ss_sp), &uss->ss_sp) |  in __compat_save_altstack()
3221 		__put_user(sas_ss_flags(sp), &uss->ss_flags) |  in __compat_save_altstack()
3222 		__put_user(t->sas_ss_size, &uss->ss_size);  in __compat_save_altstack()