aboutsummaryrefslogtreecommitdiff
path: root/arch/cris/arch-v32/kernel/signal.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/cris/arch-v32/kernel/signal.c')
-rw-r--r--arch/cris/arch-v32/kernel/signal.c148
1 files changed, 17 insertions, 131 deletions
diff --git a/arch/cris/arch-v32/kernel/signal.c b/arch/cris/arch-v32/kernel/signal.c
index ce4ab1a5552..01d1375c900 100644
--- a/arch/cris/arch-v32/kernel/signal.c
+++ b/arch/cris/arch-v32/kernel/signal.c
@@ -24,9 +24,6 @@
extern unsigned long cris_signal_return_page;
-/* Flag to check if a signal is blockable. */
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
/*
* A syscall in CRIS is really a "break 13" instruction, which is 2
* bytes. The registers is manipulated so upon return the instruction
@@ -54,67 +51,6 @@ struct rt_signal_frame {
void do_signal(int restart, struct pt_regs *regs);
void keep_debug_flags(unsigned long oldccs, unsigned long oldspc,
struct pt_regs *regs);
-/*
- * Swap in the new signal mask, and wait for a signal. Define some
- * dummy arguments to be able to reach the regs argument.
- */
-int
-sys_sigsuspend(old_sigset_t mask, long r11, long r12, long r13, long mof,
- long srp, struct pt_regs *regs)
-{
- 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;
-}
-
-int
-sys_sigaction(int signal, const struct old_sigaction *act,
- struct old_sigaction *oact)
-{
- int retval;
- struct k_sigaction newk;
- struct k_sigaction oldk;
-
- if (act) {
- old_sigset_t mask;
-
- if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
- __get_user(newk.sa.sa_handler, &act->sa_handler) ||
- __get_user(newk.sa.sa_restorer, &act->sa_restorer))
- return -EFAULT;
-
- __get_user(newk.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
- siginitset(&newk.sa.sa_mask, mask);
- }
-
- retval = do_sigaction(signal, act ? &newk : NULL, oact ? &oldk : NULL);
-
- if (!retval && oact) {
- if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
- __put_user(oldk.sa.sa_handler, &oact->sa_handler) ||
- __put_user(oldk.sa.sa_restorer, &oact->sa_restorer))
- return -EFAULT;
-
- __put_user(oldk.sa.sa_flags, &oact->sa_flags);
- __put_user(oldk.sa.sa_mask.sig[0], &oact->sa_mask);
- }
-
- return retval;
-}
-
-int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
- return do_sigaltstack(uss, uoss, rdusp());
-}
static int
restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
@@ -146,11 +82,9 @@ badframe:
return 1;
}
-/* Define some dummy arguments to be able to reach the regs argument. */
-asmlinkage int
-sys_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
- struct pt_regs *regs)
+asmlinkage int sys_sigreturn(void)
{
+ struct pt_regs *regs = current_pt_regs();
sigset_t set;
struct signal_frame __user *frame;
unsigned long oldspc = regs->spc;
@@ -175,13 +109,7 @@ sys_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
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(regs, &frame->sc))
goto badframe;
@@ -195,11 +123,9 @@ badframe:
return 0;
}
-/* Define some dummy variables to be able to reach the regs argument. */
-asmlinkage int
-sys_rt_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
- struct pt_regs *regs)
+asmlinkage int sys_rt_sigreturn(void)
{
+ struct pt_regs *regs = current_pt_regs();
sigset_t set;
struct rt_signal_frame __user *frame;
unsigned long oldspc = regs->spc;
@@ -221,18 +147,12 @@ sys_rt_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
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(regs, &frame->uc.uc_mcontext))
goto badframe;
- if (do_sigaltstack(&frame->uc.uc_stack, NULL, rdusp()) == -EFAULT)
+ if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
keep_debug_flags(oldccs, oldspc, regs);
@@ -363,10 +283,7 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
return 0;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
-
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
return -EFAULT;
}
@@ -397,6 +314,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+ err |= __save_altstack(&frame->uc.uc_stack, rdusp());
if (err)
goto give_sigsegv;
@@ -450,19 +368,17 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
return 0;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
-
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
return -EFAULT;
}
/* Invoke a signal handler to, well, handle the signal. */
-static inline int
+static inline void
handle_signal(int canrestart, unsigned long sig,
siginfo_t *info, struct k_sigaction *ka,
- sigset_t *oldset, struct pt_regs * regs)
+ struct pt_regs * regs)
{
+ sigset_t *oldset = sigmask_to_save();
int ret;
/* Check if this got called from a system call. */
@@ -512,20 +428,8 @@ handle_signal(int canrestart, unsigned long sig,
else
ret = setup_frame(sig, ka, oldset, regs);
- if (ka->sa.sa_flags & SA_ONESHOT)
- ka->sa.sa_handler = SIG_DFL;
-
- 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 == 0)
+ signal_delivered(sig, info, ka, regs, 0);
}
/*
@@ -545,7 +449,6 @@ do_signal(int canrestart, struct pt_regs *regs)
int signr;
siginfo_t info;
struct k_sigaction ka;
- sigset_t *oldset;
/*
* The common case should go fast, which is why this point is
@@ -555,25 +458,11 @@ do_signal(int canrestart, struct pt_regs *regs)
if (!user_mode(regs))
return;
- 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. */
- if (handle_signal(canrestart, signr, &info, &ka,
- 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 TIF_RESTORE_SIGMASK flag */
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- clear_thread_flag(TIF_RESTORE_SIGMASK);
- }
-
+ handle_signal(canrestart, signr, &info, &ka, regs);
return;
}
@@ -594,10 +483,7 @@ do_signal(int canrestart, struct pt_regs *regs)
/* 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();
}
asmlinkage void
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 16:06:26 +0000