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

   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 */