Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5c49574f authored by Al Viro's avatar Al Viro
Browse files

new helper: restore_altstack() 



to be used by rt_sigreturn instances

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 031b6566

include/linux/signal.h

+2 −0
Original line number Diff line number Diff line
@@ -385,4 +385,6 @@ int unhandled_signal(struct task_struct *tsk, int sig); 


void signals_init(void);



int restore_altstack(const stack_t __user *);



#endif /* _LINUX_SIGNAL_H */

kernel/signal.c

+7 −0
Original line number Diff line number Diff line
@@ -3103,6 +3103,13 @@ out: 
	return error;

}



int restore_altstack(const stack_t __user *uss)

{

	int err = do_sigaltstack(uss, NULL, current_user_stack_pointer());

	/* squash all but EFAULT for now */

	return err == -EFAULT ? err : 0;

}



#ifdef __ARCH_WANT_SYS_SIGPENDING



/**