#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs);
+void ret_from_user_signal(void);
+void ret_from_user_rt_signal(void);
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
-asmlinkage int do_sigsuspend(struct pt_regs *regs)
+asmlinkage int
+sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
{
- old_sigset_t mask = regs->d3;
- sigset_t saveset;
-
mask &= _BLOCKABLE;
spin_lock_irq(¤t->sighand->siglock);
- saveset = current->blocked;
+ current->saved_sigmask = current->blocked;
siginitset(¤t->blocked, mask);
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
- regs->d0 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(&saveset, regs))
- return -EINTR;
- }
-}
-
-asmlinkage int
-do_rt_sigsuspend(struct pt_regs *regs)
-{
- sigset_t *unewset = (sigset_t *)regs->d1;
- size_t sigsetsize = (size_t)regs->d2;
- sigset_t saveset, newset;
-
- /* XXX: Don't preclude handling different sized sigset_t's. */
- if (sigsetsize != sizeof(sigset_t))
- return -EINVAL;
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ set_restore_sigmask();
- if (copy_from_user(&newset, unewset, sizeof(newset)))
- return -EFAULT;
- sigdelsetmask(&newset, ~_BLOCKABLE);
-
- spin_lock_irq(¤t->sighand->siglock);
- saveset = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
-
- regs->d0 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(&saveset, regs))
- return -EINTR;
- }
+ return -ERESTARTNOHAND;
}
asmlinkage int
struct sigcontext context;
int err = 0;
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
/* get previous context */
if (copy_from_user(&context, usc, sizeof(context)))
goto badframe;
unsigned long usp;
int err;
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
err = __get_user(temp, &uc->uc_mcontext.version);
if (temp != MCONTEXT_VERSION)
goto badframe;
return err;
}
-static inline void push_cache (unsigned long vaddr)
-{
-}
-
static inline void *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
{
err |= copy_to_user (&frame->sc, &context, sizeof(context));
/* Set up to return from userspace. */
- err |= __put_user(frame->retcode, &frame->pretcode);
- /* moveq #,d0; trap #0 */
- err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
- (long *)(frame->retcode));
+ err |= __put_user((void *) ret_from_user_signal, &frame->pretcode);
if (err)
goto give_sigsegv;
- push_cache ((unsigned long) &frame->retcode);
-
/* Set up registers for signal handler */
wrusp ((unsigned long) frame);
regs->pc = (unsigned long) ka->sa.sa_handler;
err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
/* Set up to return from userspace. */
- err |= __put_user(frame->retcode, &frame->pretcode);
- /* moveq #,d0; notb d0; trap #0 */
- err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
- (long *)(frame->retcode + 0));
- err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
+ err |= __put_user((void *) ret_from_user_rt_signal, &frame->pretcode);
if (err)
goto give_sigsegv;
- push_cache ((unsigned long) &frame->retcode);
-
/* Set up registers for signal handler */
wrusp ((unsigned long) frame);
regs->pc = (unsigned long) ka->sa.sa_handler;
regs->d0 = -EINTR;
break;
+ case -ERESTART_RESTARTBLOCK:
+ if (!has_handler) {
+ regs->d0 = __NR_restart_syscall;
+ regs->pc -= 2;
+ break;
+ }
+ regs->d0 = -EINTR;
+ break;
+
case -ERESTARTSYS:
if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
regs->d0 = -EINTR;
else
setup_frame(sig, ka, oldset, regs);
- if (ka->sa.sa_flags & SA_ONESHOT)
- ka->sa.sa_handler = SIG_DFL;
-
spin_lock_irq(¤t->sighand->siglock);
sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
if (!(ka->sa.sa_flags & SA_NODEFER))
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
-asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs)
+asmlinkage int do_signal(struct pt_regs *regs)
{
struct k_sigaction ka;
siginfo_t info;
int signr;
+ sigset_t *oldset;
/*
* We want the common case to go fast, which
if (!user_mode(regs))
return 1;
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = ¤t->saved_sigmask;
+ else
oldset = ¤t->blocked;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
/* Whee! Actually deliver the signal. */
handle_signal(signr, &ka, &info, oldset, regs);
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
return 1;
}
/* Restart the system call - no handlers present */
handle_restart(regs, NULL, 0);
}
+
+ /* If there's no signal to deliver, we just restore the saved mask. */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL);
+ }
return 0;
}