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 */ 59