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Diffstat (limited to 'arch/h8300/kernel/signal.c')
-rw-r--r--arch/h8300/kernel/signal.c122
1 files changed, 39 insertions, 83 deletions
diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c
index af842c369d2..d4b0555d290 100644
--- a/arch/h8300/kernel/signal.c
+++ b/arch/h8300/kernel/signal.c
@@ -49,60 +49,15 @@
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
-
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
-asmlinkage int do_sigsuspend(struct pt_regs *regs)
-{
- old_sigset_t mask = regs->er3;
- sigset_t saveset;
-
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- saveset = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- regs->er0 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(regs, &saveset))
- return -EINTR;
- }
-}
-
asmlinkage int
-do_rt_sigsuspend(struct pt_regs *regs)
+sys_sigsuspend(int unused1, int unused2, old_sigset_t mask)
{
- sigset_t *unewset = (sigset_t *)regs->er1;
- size_t sigsetsize = (size_t)regs->er2;
- 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(&current->sighand->siglock);
- saveset = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- regs->er0 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(regs, &saveset))
- return -EINTR;
- }
+ sigset_t blocked;
+ siginitset(&blocked, mask);
+ return sigsuspend(&blocked);
}
asmlinkage int
@@ -116,10 +71,10 @@ sys_sigaction(int sig, const struct old_sigaction *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))
+ __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);
}
@@ -128,10 +83,10 @@ sys_sigaction(int sig, const struct old_sigaction *act,
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;
@@ -232,10 +187,7 @@ asmlinkage int do_sigreturn(unsigned long __unused,...)
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(regs, &frame->sc, &er0))
goto badframe;
@@ -260,10 +212,7 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused,...)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_unlock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_lock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &er0))
goto badframe;
@@ -314,7 +263,7 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
return (void *)((usp - frame_size) & -8UL);
}
-static void setup_frame (int sig, struct k_sigaction *ka,
+static int setup_frame (int sig, struct k_sigaction *ka,
sigset_t *set, struct pt_regs *regs)
{
struct sigframe *frame;
@@ -375,13 +324,14 @@ static void setup_frame (int sig, struct k_sigaction *ka,
regs->er1 = (unsigned long)&(frame->sc);
regs->er5 = current->mm->start_data; /* GOT base */
- return;
+ return 0;
give_sigsegv:
force_sigsegv(sig, current);
+ return -EFAULT;
}
-static void setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
+static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
struct rt_sigframe *frame;
@@ -450,10 +400,11 @@ static void setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
regs->er2 = (unsigned long)&frame->uc;
regs->er5 = current->mm->start_data; /* GOT base */
- return;
+ return 0;
give_sigsegv:
force_sigsegv(sig, current);
+ return -EFAULT;
}
/*
@@ -463,6 +414,7 @@ static void
handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
sigset_t *oldset, struct pt_regs * regs)
{
+ int ret;
/* are we from a system call? */
if (regs->orig_er0 >= 0) {
switch (regs->er0) {
@@ -485,16 +437,14 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
/* set up the stack frame */
if (ka->sa.sa_flags & SA_SIGINFO)
- setup_rt_frame(sig, ka, info, oldset, regs);
+ ret = setup_rt_frame(sig, ka, info, oldset, regs);
else
- setup_frame(sig, ka, oldset, regs);
-
- 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);
+ ret = setup_frame(sig, ka, oldset, regs);
+
+ if (!ret) {
+ block_sigmask(ka, sig);
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ }
}
/*
@@ -502,11 +452,12 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset)
+statis void do_signal(struct pt_regs *regs)
{
siginfo_t info;
int signr;
struct k_sigaction ka;
+ sigset_t *oldset;
/*
* We want the common case to go fast, which
@@ -515,21 +466,23 @@ asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset)
* if so.
*/
if ((regs->ccr & 0x10))
- return 1;
+ return;
if (try_to_freeze())
goto no_signal;
current->thread.esp0 = (unsigned long) regs;
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else
oldset = &current->blocked;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
/* Whee! Actually deliver the signal. */
handle_signal(signr, &info, &ka, oldset, regs);
- return 1;
+ return;
}
no_signal:
/* Did we come from a system call? */
@@ -546,13 +499,16 @@ asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset)
regs->pc -= 2;
}
}
- return 0;
+
+ /* If there's no signal to deliver, we just restore the saved mask. */
+ if (test_and_clear_thread_flag(TIF_RESTORE_SIGMASK))
+ set_current_blocked(&current->saved_sigmask);
}
asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags)
{
- if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
- do_signal(regs, NULL);
+ if (thread_info_flags & _TIF_SIGPENDING)
+ do_signal(regs);
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);