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authorAnton Arapov <anton@redhat.com>2012-08-07 11:21:50 +0200
committerAnton Arapov <anton@redhat.com>2012-08-07 12:52:25 +0200
commit1d44b6f3fcf6058fb7c960b7558766967e8028f7 (patch)
tree53d88547c973ba048d233091a3f91f3173ad01df /arch/frv/kernel/signal.c
parentd91eda5d7b0383e6a0c83e0146ff141ff3b1355b (diff)
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fedora kernel: 222b075b3ff0d9e88aa9353e3c80667756ed7361v3.5.0-4
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/frv/kernel/signal.c')
-rw-r--r--arch/frv/kernel/signal.c102
1 files changed, 21 insertions, 81 deletions
diff --git a/arch/frv/kernel/signal.c b/arch/frv/kernel/signal.c
index bab01298b58..864c2f0d497 100644
--- a/arch/frv/kernel/signal.c
+++ b/arch/frv/kernel/signal.c
@@ -28,8 +28,6 @@
#define DEBUG_SIG 0
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
struct fdpic_func_descriptor {
unsigned long text;
unsigned long GOT;
@@ -40,17 +38,9 @@ struct fdpic_func_descriptor {
*/
asmlinkage int sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- current->saved_sigmask = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ sigset_t blocked;
+ siginitset(&blocked, mask);
+ return sigsuspend(&blocked);
}
asmlinkage int sys_sigaction(int sig,
@@ -64,10 +54,10 @@ asmlinkage int sys_sigaction(int sig,
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))
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
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);
}
@@ -76,10 +66,10 @@ asmlinkage int sys_sigaction(int sig,
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))
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
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;
@@ -157,11 +147,7 @@ asmlinkage int sys_sigreturn(void)
__copy_from_user(&set.sig[1], &frame->extramask, sizeof(frame->extramask)))
goto badframe;
- sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(&frame->sc, &gr8))
goto badframe;
@@ -183,11 +169,7 @@ asmlinkage int sys_rt_sigreturn(void)
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
- sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(&frame->uc.uc_mcontext, &gr8))
goto badframe;
@@ -440,9 +422,10 @@ give_sigsegv:
/*
* OK, we're invoking a handler
*/
-static int handle_signal(unsigned long sig, siginfo_t *info,
- struct k_sigaction *ka, sigset_t *oldset)
+static void handle_signal(unsigned long sig, siginfo_t *info,
+ struct k_sigaction *ka)
{
+ sigset_t *oldset = sigmask_to_save();
int ret;
/* Are we from a system call? */
@@ -474,18 +457,11 @@ static int handle_signal(unsigned long sig, siginfo_t *info,
else
ret = setup_frame(sig, ka, oldset);
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked,
- &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
-
- return ret;
+ if (ret)
+ return;
+ signal_delivered(sig, info, ka, __frame,
+ test_thread_flag(TIF_SINGLESTEP));
} /* end handle_signal() */
/*****************************************************************************/
@@ -498,44 +474,14 @@ static void do_signal(void)
{
struct k_sigaction ka;
siginfo_t info;
- sigset_t *oldset;
int signr;
- /*
- * We want the common case to go fast, which
- * is why we may in certain cases get here from
- * kernel mode. Just return without doing anything
- * if so.
- */
- if (!user_mode(__frame))
- return;
-
- if (try_to_freeze())
- goto no_signal;
-
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- oldset = &current->saved_sigmask;
- else
- oldset = &current->blocked;
-
signr = get_signal_to_deliver(&info, &ka, __frame, NULL);
if (signr > 0) {
- if (handle_signal(signr, &info, &ka, oldset) == 0) {
- /* 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);
-
- tracehook_signal_handler(signr, &info, &ka, __frame,
- test_thread_flag(TIF_SINGLESTEP));
- }
-
+ handle_signal(signr, &info, &ka);
return;
}
-no_signal:
/* Did we come from a system call? */
if (__frame->syscallno != -1) {
/* Restart the system call - no handlers present */
@@ -557,11 +503,7 @@ no_signal:
/* 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);
- }
-
+ restore_saved_sigmask();
} /* end do_signal() */
/*****************************************************************************/
@@ -576,15 +518,13 @@ asmlinkage void do_notify_resume(__u32 thread_info_flags)
clear_thread_flag(TIF_SINGLESTEP);
/* deal with pending signal delivery */
- if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+ if (thread_info_flags & _TIF_SIGPENDING)
do_signal();
/* deal with notification on about to resume userspace execution */
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(__frame);
- if (current->replacement_session_keyring)
- key_replace_session_keyring();
}
} /* end do_notify_resume() */