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| author | David Woodhouse <dwmw2@infradead.org> | 2006-01-18 17:43:57 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-18 19:20:29 -0800 |
| commit | 150256d8aadb3a337c31efa9e175cbd25bf06b06 (patch) | |
| tree | 8cd7e2a0bc6af23984682c5ea3ca687809580c5a /kernel | |
| parent | a60fc5190a31d98508ea6a76f74217f4104e74b7 (diff) | |
| download | linux-150256d8aadb3a337c31efa9e175cbd25bf06b06.tar.bz2 | |
[PATCH] Generic sys_rt_sigsuspend()
The TIF_RESTORE_SIGMASK flag allows us to have a generic implementation of
sys_rt_sigsuspend() instead of duplicating it for each architecture. This
provides such an implementation and makes arch/powerpc use it.
It also tidies up the ppc32 sys_sigsuspend() to use TIF_RESTORE_SIGMASK.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/compat.c | 28 | ||||
| -rw-r--r-- | kernel/signal.c | 26 |
2 files changed, 54 insertions, 0 deletions
diff --git a/kernel/compat.c b/kernel/compat.c index 256e5d9f0647..1867290c37e3 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -871,3 +871,31 @@ asmlinkage long compat_sys_stime(compat_time_t __user *tptr) } #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ + +#ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND +asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) +{ + sigset_t newset; + compat_sigset_t newset32; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) + return -EFAULT; + sigset_from_compat(&newset, &newset32); + sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); + + spin_lock_irq(¤t->sighand->siglock); + current->saved_sigmask = current->blocked; + current->blocked = newset; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + current->state = TASK_INTERRUPTIBLE; + schedule(); + set_thread_flag(TIF_RESTORE_SIGMASK); + return -ERESTARTNOHAND; +} +#endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ diff --git a/kernel/signal.c b/kernel/signal.c index 5dafbd36d62e..d3efafd8109a 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2721,6 +2721,32 @@ sys_pause(void) #endif +#ifdef __ARCH_WANT_SYS_RT_SIGSUSPEND +asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize) +{ + sigset_t 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, sigmask(SIGKILL)|sigmask(SIGSTOP)); + + spin_lock_irq(¤t->sighand->siglock); + current->saved_sigmask = current->blocked; + current->blocked = newset; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + current->state = TASK_INTERRUPTIBLE; + schedule(); + set_thread_flag(TIF_RESTORE_SIGMASK); + return -ERESTARTNOHAND; +} +#endif /* __ARCH_WANT_SYS_RT_SIGSUSPEND */ + void __init signals_init(void) { sigqueue_cachep = |