LXR linux/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
  13static 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
  29static 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 */
  58