#include <asm/processor.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
-#include <asm/arch/ptrace.h>
-#include <asm/arch/hwregs/cpu_vect.h>
+#include <arch/ptrace.h>
+#include <arch/hwregs/cpu_vect.h>
extern unsigned long cris_signal_return_page;
unsigned char retcode[8]; /* Trampoline code. */
};
-int do_signal(int restart, sigset_t *oldset, struct pt_regs *regs);
+void do_signal(int restart, struct pt_regs *regs);
void keep_debug_flags(unsigned long oldccs, unsigned long oldspc,
struct pt_regs *regs);
/*
sys_sigsuspend(old_sigset_t mask, long r11, long r12, long r13, long mof,
long srp, struct pt_regs *regs)
{
- sigset_t saveset;
-
mask &= _BLOCKABLE;
-
spin_lock_irq(¤t->sighand->siglock);
-
- saveset = current->blocked;
-
+ current->saved_sigmask = current->blocked;
siginitset(¤t->blocked, mask);
-
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
-
- regs->r10 = -EINTR;
-
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
-
- if (do_signal(0, &saveset, regs)) {
- /*
- * This point is reached twice: once to call
- * the signal handler, then again to return
- * from the sigsuspend system call. When
- * calling the signal handler, R10 hold the
- * signal number as set by do_signal(). The
- * sigsuspend call will always return with
- * the restored value above; -EINTR.
- */
- return regs->r10;
- }
- }
-}
-
-/* Define some dummy arguments to be able to reach the regs argument. */
-int
-sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize, long r12, long r13,
- long mof, long srp, struct pt_regs *regs)
-{
- sigset_t saveset;
- sigset_t newset;
-
- 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->r10 = -EINTR;
-
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
-
- if (do_signal(0, &saveset, regs)) {
- /* See comment in function above. */
- return regs->r10;
- }
- }
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ set_thread_flag(TIF_RESTORE_SIGMASK);
+ return -ERESTARTNOHAND;
}
int
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, rdusp()) == -EFAULT)
- goto badframe;
+ goto badframe;
keep_debug_flags(oldccs, oldspc, regs);
* which performs the syscall sigreturn(), or a provided user-mode
* trampoline.
*/
-static void
+static int
setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
struct pt_regs * regs)
{
/* Actually move the USP to reflect the stacked frame. */
wrusp((unsigned long)frame);
- return;
+ return 0;
give_sigsegv:
if (sig == SIGSEGV)
ka->sa.sa_handler = SIG_DFL;
force_sig(SIGSEGV, current);
+ return -EFAULT;
}
-static void
+static int
setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs * regs)
{
/* Actually move the usp to reflect the stacked frame. */
wrusp((unsigned long)frame);
- return;
+ return 0;
give_sigsegv:
if (sig == SIGSEGV)
ka->sa.sa_handler = SIG_DFL;
force_sig(SIGSEGV, current);
+ return -EFAULT;
}
/* Invoke a singal handler to, well, handle the signal. */
-static inline void
+static inline int
handle_signal(int canrestart, unsigned long sig,
siginfo_t *info, struct k_sigaction *ka,
sigset_t *oldset, struct pt_regs * regs)
{
+ int ret;
+
/* Check if this got called from a system call. */
if (canrestart) {
/* If so, check system call restarting. */
/* 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);
+ ret = setup_frame(sig, ka, oldset, regs);
if (ka->sa.sa_flags & SA_ONESHOT)
ka->sa.sa_handler = SIG_DFL;
- spin_lock_irq(¤t->sighand->siglock);
- sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(¤t->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
+ if (ret == 0) {
+ spin_lock_irq(¤t->sighand->siglock);
+ sigorsets(¤t->blocked, ¤t->blocked,
+ &ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
+ sigaddset(¤t->blocked, sig);
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+ }
+
+ return ret;
}
/*
* we can use user_mode(regs) to see if we came directly from kernel or user
* mode below.
*/
-int
-do_signal(int canrestart, sigset_t *oldset, struct pt_regs *regs)
+void
+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
* without doing anything.
*/
if (!user_mode(regs))
- return 1;
+ return;
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = ¤t->saved_sigmask;
+ else
oldset = ¤t->blocked;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
- /* Deliver the signal. */
- handle_signal(canrestart, signr, &info, &ka, oldset, regs);
- return 1;
+ /* 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);
+ }
+
+ return;
}
/* Got here from a system call? */
}
}
- 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, ¤t->saved_sigmask, NULL);
+ }
}
asmlinkage void
projects / linux-2.6-omap-h63xx.git / blobdiff