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authorTrond Myklebust <Trond.Myklebust@netapp.com>2007-02-13 22:02:32 -0800
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-02-13 22:02:32 -0800
commitac98695d6c1508b724f246f38ce57fb4e3cec356 (patch)
tree189969a3689b9b83eaf39314a7942cc781ff836b /include/asm-mips/compat-signal.h
parentd9bc125caf592b7d081021f32ce5b717efdf70c8 (diff)
parent93bbad8fe13a25dcf7f3bc628a71d1a7642ae61b (diff)
Merge branch 'master' of /home/trondmy/kernel/linux-2.6/
Diffstat (limited to 'include/asm-mips/compat-signal.h')
-rw-r--r--include/asm-mips/compat-signal.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/include/asm-mips/compat-signal.h b/include/asm-mips/compat-signal.h
new file mode 100644
index 00000000000..672077084aa
--- /dev/null
+++ b/include/asm-mips/compat-signal.h
@@ -0,0 +1,55 @@
+#ifndef __ASM_COMPAT_SIGNAL_H
+#define __ASM_COMPAT_SIGNAL_H
+
+#include <linux/bug.h>
+#include <linux/compat.h>
+#include <linux/compiler.h>
+
+static inline int __copy_conv_sigset_to_user(compat_sigset_t __user *d,
+ const sigset_t *s)
+{
+ int err;
+
+ BUG_ON(sizeof(*d) != sizeof(*s));
+ BUG_ON(_NSIG_WORDS != 2);
+
+ err = __put_user(s->sig[0], &d->sig[0]);
+ err |= __put_user(s->sig[0] >> 32, &d->sig[1]);
+ err |= __put_user(s->sig[1], &d->sig[2]);
+ err |= __put_user(s->sig[1] >> 32, &d->sig[3]);
+
+ return err;
+}
+
+static inline int __copy_conv_sigset_from_user(sigset_t *d,
+ const compat_sigset_t __user *s)
+{
+ int err;
+ union sigset_u {
+ sigset_t s;
+ compat_sigset_t c;
+ } *u = (union sigset_u *) d;
+
+ BUG_ON(sizeof(*d) != sizeof(*s));
+ BUG_ON(_NSIG_WORDS != 2);
+
+ if (unlikely(!access_ok(VERIFY_READ, d, sizeof(*d))))
+ return -EFAULT;
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ err = __get_user(u->c.sig[1], &s->sig[0]);
+ err |= __get_user(u->c.sig[0], &s->sig[1]);
+ err |= __get_user(u->c.sig[3], &s->sig[2]);
+ err |= __get_user(u->c.sig[2], &s->sig[3]);
+#endif
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+ err = __get_user(u->c.sig[0], &s->sig[0]);
+ err |= __get_user(u->c.sig[1], &s->sig[1]);
+ err |= __get_user(u->c.sig[2], &s->sig[2]);
+ err |= __get_user(u->c.sig[3], &s->sig[3]);
+#endif
+
+ return err;
+}
+
+#endif /* __ASM_COMPAT_SIGNAL_H */