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generic compat_sys_rt_sigprocmask()

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conditional on GENERIC_COMPAT_RT_SIGPROCMASK; by the end of that series
it will become the same thing as COMPAT and conditional will die out.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-12-25 13:32:58 -05:00
parent ad4b65a434
commit 322a56cb1f
4 changed files with 63 additions and 2 deletions
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41
kernel/signal.c
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@ -2613,6 +2613,47 @@ SYSCALL_DEFINE4(rt_sigprocmask, int, how, sigset_t __user *, nset,
return 0;
}
#ifdef CONFIG_COMPAT
#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPROCMASK
COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset,
compat_sigset_t __user *, oset, compat_size_t, sigsetsize)
{
#ifdef __BIG_ENDIAN
sigset_t old_set = current->blocked;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
if (nset) {
compat_sigset_t new32;
sigset_t new_set;
int error;
if (copy_from_user(&new32, nset, sizeof(compat_sigset_t)))
return -EFAULT;
sigset_from_compat(&new_set, &new32);
sigdelsetmask(&new_set, sigmask(SIGKILL)|sigmask(SIGSTOP));
error = sigprocmask(how, &new_set, NULL);
if (error)
return error;
}
if (oset) {
compat_sigset_t old32;
sigset_to_compat(&old32, &old_set);
if (copy_to_user(oset, &old_set, sizeof(sigset_t)))
return -EFAULT;
}
return 0;
#else
return sys_rt_sigprocmask(how, (sigset_t __user *)nset,
(sigset_t __user *)oset, sigsetsize);
#endif
}
#endif
#endif
long do_sigpending(void __user *set, unsigned long sigsetsize)
{
long error = -EINVAL;