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signal/timer/event: signalfd compat code

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This patch implements the necessary compat code for the signalfd system call.

Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Davide Libenzi 2007-05-10 22:23:15 -07:00 committed by Linus Torvalds
parent 2121e24bd8
commit 6d18c92209
1 changed files with 26 additions and 0 deletions
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26
fs/compat.c
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@ -46,6 +46,7 @@
#include <linux/tsacct_kern.h>
#include <linux/security.h>
#include <linux/highmem.h>
#include <linux/signal.h>
#include <linux/poll.h>
#include <linux/mm.h>
#include <linux/eventpoll.h>
@ -2199,3 +2200,28 @@ asmlinkage long compat_sys_epoll_pwait(int epfd,
#endif /* TIF_RESTORE_SIGMASK */
#endif /* CONFIG_EPOLL */
#ifdef CONFIG_SIGNALFD
asmlinkage long compat_sys_signalfd(int ufd,
const compat_sigset_t __user *sigmask,
compat_size_t sigsetsize)
{
compat_sigset_t ss32;
sigset_t tmp;
sigset_t __user *ksigmask;
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
return -EFAULT;
sigset_from_compat(&tmp, &ss32);
ksigmask = compat_alloc_user_space(sizeof(sigset_t));
if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
return -EFAULT;
return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));
}
#endif /* CONFIG_SIGNALFD */