Linux Kernel  3.7.1
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compat-signal.h
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1 #ifndef __ASM_COMPAT_SIGNAL_H
2 #define __ASM_COMPAT_SIGNAL_H
3 
4 #include <linux/bug.h>
5 #include <linux/compat.h>
6 #include <linux/compiler.h>
7 
8 #include <asm/signal.h>
9 #include <asm/siginfo.h>
10 
11 #include <asm/uaccess.h>
12 
13 static inline int __copy_conv_sigset_to_user(compat_sigset_t __user *d,
14  const sigset_t *s)
15 {
16  int err;
17 
18  BUG_ON(sizeof(*d) != sizeof(*s));
19  BUG_ON(_NSIG_WORDS != 2);
20 
21  err = __put_user(s->sig[0], &d->sig[0]);
22  err |= __put_user(s->sig[0] >> 32, &d->sig[1]);
23  err |= __put_user(s->sig[1], &d->sig[2]);
24  err |= __put_user(s->sig[1] >> 32, &d->sig[3]);
25 
26  return err;
27 }
28 
29 static inline int __copy_conv_sigset_from_user(sigset_t *d,
30  const compat_sigset_t __user *s)
31 {
32  int err;
33  union sigset_u {
34  sigset_t s;
35  compat_sigset_t c;
36  } *u = (union sigset_u *) d;
37 
38  BUG_ON(sizeof(*d) != sizeof(*s));
39  BUG_ON(_NSIG_WORDS != 2);
40 
41 #ifdef CONFIG_CPU_BIG_ENDIAN
42  err = __get_user(u->c.sig[1], &s->sig[0]);
43  err |= __get_user(u->c.sig[0], &s->sig[1]);
44  err |= __get_user(u->c.sig[3], &s->sig[2]);
45  err |= __get_user(u->c.sig[2], &s->sig[3]);
46 #endif
47 #ifdef CONFIG_CPU_LITTLE_ENDIAN
48  err = __get_user(u->c.sig[0], &s->sig[0]);
49  err |= __get_user(u->c.sig[1], &s->sig[1]);
50  err |= __get_user(u->c.sig[2], &s->sig[2]);
51  err |= __get_user(u->c.sig[3], &s->sig[3]);
52 #endif
53 
54  return err;
55 }
56 
57 #endif /* __ASM_COMPAT_SIGNAL_H */