1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_COMPAT_SIGNAL_H
3 #define __ASM_COMPAT_SIGNAL_H
4
5 #include <linux/bug.h>
6 #include <linux/compat.h>
7 #include <linux/compiler.h>
8
9 #include <asm/signal.h>
10 #include <asm/siginfo.h>
11
12 #include <linux/uaccess.h>
13
__copy_conv_sigset_to_user(compat_sigset_t __user * d,const sigset_t * s)14 static inline int __copy_conv_sigset_to_user(compat_sigset_t __user *d,
15 const sigset_t *s)
16 {
17 int err;
18
19 BUG_ON(sizeof(*d) != sizeof(*s));
20 BUG_ON(_NSIG_WORDS != 2);
21
22 err = __put_user(s->sig[0], &d->sig[0]);
23 err |= __put_user(s->sig[0] >> 32, &d->sig[1]);
24 err |= __put_user(s->sig[1], &d->sig[2]);
25 err |= __put_user(s->sig[1] >> 32, &d->sig[3]);
26
27 return err;
28 }
29
__copy_conv_sigset_from_user(sigset_t * d,const compat_sigset_t __user * s)30 static inline int __copy_conv_sigset_from_user(sigset_t *d,
31 const compat_sigset_t __user *s)
32 {
33 int err;
34 union sigset_u {
35 sigset_t s;
36 compat_sigset_t c;
37 } *u = (union sigset_u *) d;
38
39 BUG_ON(sizeof(*d) != sizeof(*s));
40 BUG_ON(_NSIG_WORDS != 2);
41
42 #ifdef CONFIG_CPU_BIG_ENDIAN
43 err = __get_user(u->c.sig[1], &s->sig[0]);
44 err |= __get_user(u->c.sig[0], &s->sig[1]);
45 err |= __get_user(u->c.sig[3], &s->sig[2]);
46 err |= __get_user(u->c.sig[2], &s->sig[3]);
47 #endif
48 #ifdef CONFIG_CPU_LITTLE_ENDIAN
49 err = __get_user(u->c.sig[0], &s->sig[0]);
50 err |= __get_user(u->c.sig[1], &s->sig[1]);
51 err |= __get_user(u->c.sig[2], &s->sig[2]);
52 err |= __get_user(u->c.sig[3], &s->sig[3]);
53 #endif
54
55 return err;
56 }
57
58 #endif /* __ASM_COMPAT_SIGNAL_H */
59