arch/mips/include/asm/compat-signal.h

   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
  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
  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 */