|
@@ -45,91 +45,8 @@
|
|
|
|
|
|
asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_sycall);
|
|
|
|
|
|
-/*
|
|
|
- * Atomically swap in the new signal mask, and wait for a signal.
|
|
|
- */
|
|
|
-asmlinkage int
|
|
|
-sys_sigsuspend(old_sigset_t mask, struct pt_regs *regs)
|
|
|
-{
|
|
|
- sigset_t saveset;
|
|
|
-
|
|
|
- mask &= _BLOCKABLE;
|
|
|
- spin_lock_irq(¤t->sighand->siglock);
|
|
|
- saveset = current->blocked;
|
|
|
- siginitset(¤t->blocked, mask);
|
|
|
- recalc_sigpending();
|
|
|
- spin_unlock_irq(¤t->sighand->siglock);
|
|
|
-
|
|
|
- regs->r3 = -EINTR;
|
|
|
- while (1) {
|
|
|
- current->state = TASK_INTERRUPTIBLE;
|
|
|
- schedule();
|
|
|
- if (do_signal(regs, &saveset, 1))
|
|
|
- return -EINTR;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-asmlinkage int
|
|
|
-sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize,
|
|
|
- struct pt_regs *regs)
|
|
|
-{
|
|
|
- sigset_t saveset, newset;
|
|
|
-
|
|
|
- /* XXX: Don't preclude handling different sized sigset_t's. */
|
|
|
- if (sigsetsize != sizeof(sigset_t))
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- 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->r3 = -EINTR;
|
|
|
- while (1) {
|
|
|
- current->state = TASK_INTERRUPTIBLE;
|
|
|
- schedule();
|
|
|
- if (do_signal(regs, &saveset, 1))
|
|
|
- return -EINTR;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-asmlinkage int
|
|
|
-sys_sigaction(int sig, const struct old_sigaction *act,
|
|
|
- struct old_sigaction *oact)
|
|
|
-{
|
|
|
- struct k_sigaction new_ka, old_ka;
|
|
|
- int ret;
|
|
|
-
|
|
|
- if (act) {
|
|
|
- old_sigset_t mask;
|
|
|
- if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
|
|
|
- __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
|
|
|
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
|
|
|
- return -EFAULT;
|
|
|
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
|
|
|
- __get_user(mask, &act->sa_mask);
|
|
|
- siginitset(&new_ka.sa.sa_mask, mask);
|
|
|
- }
|
|
|
|
|
|
- ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
|
|
|
-
|
|
|
- if (!ret && oact) {
|
|
|
- if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
|
|
|
- __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
|
|
|
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
|
|
|
- return -EFAULT;
|
|
|
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
|
|
|
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
|
|
|
- }
|
|
|
-
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-asmlinkage int
|
|
|
+asmlinkage long
|
|
|
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
|
|
|
struct pt_regs *regs)
|
|
|
{
|
|
@@ -139,7 +56,6 @@ sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
|
|
|
/*
|
|
|
* Do a signal return; undo the signal stack.
|
|
|
*/
|
|
|
-
|
|
|
struct sigframe {
|
|
|
struct sigcontext sc;
|
|
|
unsigned long extramask[_NSIG_WORDS-1];
|
|
@@ -176,40 +92,7 @@ static int restore_sigcontext(struct pt_regs *regs,
|
|
|
return err;
|
|
|
}
|
|
|
|
|
|
-asmlinkage int sys_sigreturn(struct pt_regs *regs)
|
|
|
-{
|
|
|
- struct sigframe *frame =
|
|
|
- (struct sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE);
|
|
|
-
|
|
|
- sigset_t set;
|
|
|
- int rval;
|
|
|
-
|
|
|
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
|
|
|
- goto badframe;
|
|
|
-
|
|
|
- if (__get_user(set.sig[0], &frame->sc.oldmask)
|
|
|
- || (_NSIG_WORDS > 1
|
|
|
- && __copy_from_user(&set.sig[1], &frame->extramask,
|
|
|
- sizeof(frame->extramask))))
|
|
|
- goto badframe;
|
|
|
-
|
|
|
- sigdelsetmask(&set, ~_BLOCKABLE);
|
|
|
-
|
|
|
- spin_lock_irq(¤t->sighand->siglock);
|
|
|
- current->blocked = set;
|
|
|
- recalc_sigpending();
|
|
|
- spin_unlock_irq(¤t->sighand->siglock);
|
|
|
-
|
|
|
- if (restore_sigcontext(regs, &frame->sc, &rval))
|
|
|
- goto badframe;
|
|
|
- return rval;
|
|
|
-
|
|
|
-badframe:
|
|
|
- force_sig(SIGSEGV, current);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
|
|
|
+asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
|
|
|
{
|
|
|
struct rt_sigframe __user *frame =
|
|
|
(struct rt_sigframe __user *)(regs->r1 + STATE_SAVE_ARG_SPACE);
|
|
@@ -324,21 +207,17 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
|
|
|
/* Set up to return from userspace. If provided, use a stub
|
|
|
already in userspace. */
|
|
|
/* minus 8 is offset to cater for "rtsd r15,8" */
|
|
|
- if (ka->sa.sa_flags & SA_RESTORER) {
|
|
|
- regs->r15 = ((unsigned long)ka->sa.sa_restorer)-8;
|
|
|
- } else {
|
|
|
- /* addi r12, r0, __NR_sigreturn */
|
|
|
- err |= __put_user(0x31800000 | __NR_rt_sigreturn ,
|
|
|
- frame->tramp + 0);
|
|
|
- /* brki r14, 0x8 */
|
|
|
- err |= __put_user(0xb9cc0008, frame->tramp + 1);
|
|
|
-
|
|
|
- /* Return from sighandler will jump to the tramp.
|
|
|
- Negative 8 offset because return is rtsd r15, 8 */
|
|
|
- regs->r15 = ((unsigned long)frame->tramp)-8;
|
|
|
-
|
|
|
- __invalidate_cache_sigtramp((unsigned long)frame->tramp);
|
|
|
- }
|
|
|
+ /* addi r12, r0, __NR_sigreturn */
|
|
|
+ err |= __put_user(0x31800000 | __NR_rt_sigreturn ,
|
|
|
+ frame->tramp + 0);
|
|
|
+ /* brki r14, 0x8 */
|
|
|
+ err |= __put_user(0xb9cc0008, frame->tramp + 1);
|
|
|
+
|
|
|
+ /* Return from sighandler will jump to the tramp.
|
|
|
+ Negative 8 offset because return is rtsd r15, 8 */
|
|
|
+ regs->r15 = ((unsigned long)frame->tramp)-8;
|
|
|
+
|
|
|
+ __invalidate_cache_sigtramp((unsigned long)frame->tramp);
|
|
|
|
|
|
if (err)
|
|
|
goto give_sigsegv;
|
|
@@ -405,7 +284,7 @@ do_restart:
|
|
|
* OK, we're invoking a handler
|
|
|
*/
|
|
|
|
|
|
-static void
|
|
|
+static int
|
|
|
handle_signal(unsigned long sig, struct k_sigaction *ka,
|
|
|
siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
|
|
|
{
|
|
@@ -426,6 +305,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
|
|
|
recalc_sigpending();
|
|
|
spin_unlock_irq(¤t->sighand->siglock);
|
|
|
}
|
|
|
+ return 1;
|
|
|
}
|
|
|
|
|
|
/*
|
|
@@ -456,7 +336,9 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall)
|
|
|
if (kernel_mode(regs))
|
|
|
return 1;
|
|
|
|
|
|
- if (!oldset)
|
|
|
+ if (current_thread_info()->status & TS_RESTORE_SIGMASK)
|
|
|
+ oldset = ¤t->saved_sigmask;
|
|
|
+ else
|
|
|
oldset = ¤t->blocked;
|
|
|
|
|
|
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
|
|
@@ -464,13 +346,31 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall)
|
|
|
/* Whee! Actually deliver the signal. */
|
|
|
if (in_syscall)
|
|
|
handle_restart(regs, &ka, 1);
|
|
|
- handle_signal(signr, &ka, &info, oldset, regs);
|
|
|
+ if (handle_signal(signr, &ka, &info, oldset, regs)) {
|
|
|
+ /*
|
|
|
+ * A signal was successfully delivered; the saved
|
|
|
+ * sigmask will have been stored in the signal frame,
|
|
|
+ * and will be restored by sigreturn, so we can simply
|
|
|
+ * clear the TS_RESTORE_SIGMASK flag.
|
|
|
+ */
|
|
|
+ current_thread_info()->status &=
|
|
|
+ ~TS_RESTORE_SIGMASK;
|
|
|
+ }
|
|
|
return 1;
|
|
|
}
|
|
|
|
|
|
if (in_syscall)
|
|
|
handle_restart(regs, NULL, 0);
|
|
|
|
|
|
+ /*
|
|
|
+ * If there's no signal to deliver, we just put the saved sigmask
|
|
|
+ * back.
|
|
|
+ */
|
|
|
+ if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
|
|
|
+ current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
|
|
|
+ sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL);
|
|
|
+ }
|
|
|
+
|
|
|
/* Did we come from a system call? */
|
|
|
return 0;
|
|
|
}
|