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authorAlexey Dobriyan <adobriyan@openvz.org>2007-01-23 19:03:17 +0300
committerTony Luck <tony.luck@intel.com>2007-05-08 14:51:59 -0700
commit4a177cbf84f827cf9f1d6cfa5264fafd3cc33ce0 (patch)
treeef04ada4e2b708ee965081cd905026c9156863d3 /arch/ia64/kernel/signal.c
parent690def21414fa43fac1b8053fd952c0366c476de (diff)
[IA64] Add TIF_RESTORE_SIGMASK
Preparation for pselect and ppoll. ia32 compat code not tested. :-( Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/signal.c')
-rw-r--r--arch/ia64/kernel/signal.c71
1 files changed, 23 insertions, 48 deletions
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index 77f8b49c788..034b81d62bb 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -41,47 +41,6 @@
# define GET_SIGSET(k,u) __get_user((k)->sig[0], &(u)->sig[0])
#endif
-long
-ia64_rt_sigsuspend (sigset_t __user *uset, size_t sigsetsize, struct sigscratch *scr)
-{
- sigset_t oldset, set;
-
- /* XXX: Don't preclude handling different sized sigset_t's. */
- if (sigsetsize != sizeof(sigset_t))
- return -EINVAL;
-
- if (!access_ok(VERIFY_READ, uset, sigsetsize))
- return -EFAULT;
-
- if (GET_SIGSET(&set, uset))
- return -EFAULT;
-
- sigdelsetmask(&set, ~_BLOCKABLE);
-
- spin_lock_irq(&current->sighand->siglock);
- {
- oldset = current->blocked;
- current->blocked = set;
- recalc_sigpending();
- }
- spin_unlock_irq(&current->sighand->siglock);
-
- /*
- * The return below usually returns to the signal handler. We need to
- * pre-set the correct error code here to ensure that the right values
- * get saved in sigcontext by ia64_do_signal.
- */
- scr->pt.r8 = EINTR;
- scr->pt.r10 = -1;
-
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (ia64_do_signal(&oldset, scr, 1))
- return -EINTR;
- }
-}
-
asmlinkage long
sys_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, long arg2,
long arg3, long arg4, long arg5, long arg6, long arg7,
@@ -478,10 +437,11 @@ handle_signal (unsigned long sig, struct k_sigaction *ka, siginfo_t *info, sigse
* Note that `init' is a special process: it doesn't get signals it doesn't want to
* handle. Thus you cannot kill init even with a SIGKILL even by mistake.
*/
-long
-ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
+void
+ia64_do_signal (struct sigscratch *scr, long in_syscall)
{
struct k_sigaction ka;
+ sigset_t *oldset;
siginfo_t info;
long restart = in_syscall;
long errno = scr->pt.r8;
@@ -493,9 +453,11 @@ ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
* doing anything if so.
*/
if (!user_mode(&scr->pt))
- return 0;
+ return;
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else
oldset = &current->blocked;
/*
@@ -558,8 +520,15 @@ ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
* Whee! Actually deliver the signal. If the delivery failed, we need to
* continue to iterate in this loop so we can deliver the SIGSEGV...
*/
- if (handle_signal(signr, &ka, &info, oldset, scr))
- return 1;
+ if (handle_signal(signr, &ka, &info, oldset, scr)) {
+ /* 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 TIF_RESTORE_SIGMASK flag */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ return;
+ }
}
/* Did we come from a system call? */
@@ -585,5 +554,11 @@ ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
}
}
}
- return 0;
+
+ /* if there's no signal to deliver, we just put the saved sigmask
+ * back */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+ }
}