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authorAl Viro <viro@zeniv.linux.org.uk>2013-02-24 01:41:39 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2013-03-03 22:58:46 -0500
commit7d197ed4a68e76000070979563051e08bf6fc0aa (patch)
treead74a62a2808db635a954c571d8b9a59bb4cf43c /fs/signalfd.c
parent2cf0966683430b6468f36ca20515a33ca7f2403c (diff)
downloadlinux-stericsson-7d197ed4a68e76000070979563051e08bf6fc0aa.tar.gz
switch signalfd{,4}() to COMPAT_SYSCALL_DEFINE
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/signalfd.c')
-rw-r--r--fs/signalfd.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/signalfd.c b/fs/signalfd.c
index b53486961735..424b7b65321f 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -30,6 +30,7 @@
#include <linux/signalfd.h>
#include <linux/syscalls.h>
#include <linux/proc_fs.h>
+#include <linux/compat.h>
void signalfd_cleanup(struct sighand_struct *sighand)
{
@@ -311,3 +312,33 @@ SYSCALL_DEFINE3(signalfd, int, ufd, sigset_t __user *, user_mask,
{
return sys_signalfd4(ufd, user_mask, sizemask, 0);
}
+
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE4(signalfd4, int, ufd,
+ const compat_sigset_t __user *,sigmask,
+ compat_size_t, sigsetsize,
+ int, flags)
+{
+ 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_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
+}
+
+COMPAT_SYSCALL_DEFINE3(signalfd, int, ufd,
+ const compat_sigset_t __user *,sigmask,
+ compat_size_t, sigsetsize)
+{
+ return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
+}
+#endif