include/linux/compat.h

   1 #ifndef _LINUX_COMPAT_H
   2 #define _LINUX_COMPAT_H
   3 /*
   4  * These are the type definitions for the architecture specific
   5  * syscall compatibility layer.
   6  */
   7
   8 #ifdef CONFIG_COMPAT
   9
  10 #include <linux/stat.h>
  11 #include <linux/param.h>        /* for HZ */
  12 #include <linux/sem.h>
  13
  14 #include <asm/compat.h>
  15 #include <asm/siginfo.h>
  16 #include <asm/signal.h>
  17
  18 #define compat_jiffies_to_clock_t(x)    \
  19                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  20
  21 typedef __compat_uid32_t        compat_uid_t;
  22 typedef __compat_gid32_t        compat_gid_t;
  23
  24 struct rusage;
  25
  26 struct compat_itimerspec {
  27         struct compat_timespec it_interval;
  28         struct compat_timespec it_value;
  29 };
  30
  31 struct compat_utimbuf {
  32         compat_time_t           actime;
  33         compat_time_t           modtime;
  34 };
  35
  36 struct compat_itimerval {
  37         struct compat_timeval   it_interval;
  38         struct compat_timeval   it_value;
  39 };
  40
  41 struct compat_tms {
  42         compat_clock_t          tms_utime;
  43         compat_clock_t          tms_stime;
  44         compat_clock_t          tms_cutime;
  45         compat_clock_t          tms_cstime;
  46 };
  47
  48 struct compat_timex {
  49         compat_uint_t modes;
  50         compat_long_t offset;
  51         compat_long_t freq;
  52         compat_long_t maxerror;
  53         compat_long_t esterror;
  54         compat_int_t status;
  55         compat_long_t constant;
  56         compat_long_t precision;
  57         compat_long_t tolerance;
  58         struct compat_timeval time;
  59         compat_long_t tick;
  60         compat_long_t ppsfreq;
  61         compat_long_t jitter;
  62         compat_int_t shift;
  63         compat_long_t stabil;
  64         compat_long_t jitcnt;
  65         compat_long_t calcnt;
  66         compat_long_t errcnt;
  67         compat_long_t stbcnt;
  68
  69         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  70         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  71         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  72 };
  73
  74 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
  75
  76 typedef struct {
  77         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
  78 } compat_sigset_t;
  79
  80 extern int cp_compat_stat(struct kstat *, struct compat_stat __user *);
  81 extern int get_compat_timespec(struct timespec *, const struct compat_timespec __user *);
  82 extern int put_compat_timespec(const struct timespec *, struct compat_timespec __user *);
  83
  84 struct compat_iovec {
  85         compat_uptr_t   iov_base;
  86         compat_size_t   iov_len;
  87 };
  88
  89 struct compat_rlimit {
  90         compat_ulong_t  rlim_cur;
  91         compat_ulong_t  rlim_max;
  92 };
  93
  94 struct compat_rusage {
  95         struct compat_timeval ru_utime;
  96         struct compat_timeval ru_stime;
  97         compat_long_t   ru_maxrss;
  98         compat_long_t   ru_ixrss;
  99         compat_long_t   ru_idrss;
 100         compat_long_t   ru_isrss;
 101         compat_long_t   ru_minflt;
 102         compat_long_t   ru_majflt;
 103         compat_long_t   ru_nswap;
 104         compat_long_t   ru_inblock;
 105         compat_long_t   ru_oublock;
 106         compat_long_t   ru_msgsnd;
 107         compat_long_t   ru_msgrcv;
 108         compat_long_t   ru_nsignals;
 109         compat_long_t   ru_nvcsw;
 110         compat_long_t   ru_nivcsw;
 111 };
 112
 113 extern int put_compat_rusage(const struct rusage *, struct compat_rusage __user *);
 114
 115 struct compat_siginfo;
 116
 117 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 118                 struct compat_siginfo __user *, int,
 119                 struct compat_rusage __user *);
 120
 121 struct compat_dirent {
 122         u32             d_ino;
 123         compat_off_t    d_off;
 124         u16             d_reclen;
 125         char            d_name[256];
 126 };
 127
 128 typedef union compat_sigval {
 129         compat_int_t    sival_int;
 130         compat_uptr_t   sival_ptr;
 131 } compat_sigval_t;
 132
 133 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 134
 135 typedef struct compat_sigevent {
 136         compat_sigval_t sigev_value;
 137         compat_int_t sigev_signo;
 138         compat_int_t sigev_notify;
 139         union {
 140                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 141                 compat_int_t _tid;
 142
 143                 struct {
 144                         compat_uptr_t _function;
 145                         compat_uptr_t _attribute;
 146                 } _sigev_thread;
 147         } _sigev_un;
 148 } compat_sigevent_t;
 149
 150 struct compat_robust_list {
 151         compat_uptr_t                   next;
 152 };
 153
 154 struct compat_robust_list_head {
 155         struct compat_robust_list       list;
 156         compat_long_t                   futex_offset;
 157         compat_uptr_t                   list_op_pending;
 158 };
 159
 160 extern void compat_exit_robust_list(struct task_struct *curr);
 161
 162 asmlinkage long
 163 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 164                            compat_size_t len);
 165 asmlinkage long
 166 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 167                            compat_size_t __user *len_ptr);
 168
 169 long compat_sys_semctl(int first, int second, int third, void __user *uptr);
 170 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
 171 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 172                 int version, void __user *uptr);
 173 long compat_sys_msgctl(int first, int second, void __user *uptr);
 174 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 175                 void __user *uptr);
 176 long compat_sys_shmctl(int first, int second, void __user *uptr);
 177 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 178                 unsigned nsems, const struct compat_timespec __user *timeout);
 179 asmlinkage long compat_sys_keyctl(u32 option,
 180                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 181
 182 asmlinkage ssize_t compat_sys_readv(unsigned long fd,
 183                 const struct compat_iovec __user *vec, unsigned long vlen);
 184 asmlinkage ssize_t compat_sys_writev(unsigned long fd,
 185                 const struct compat_iovec __user *vec, unsigned long vlen);
 186
 187 int compat_do_execve(char * filename, compat_uptr_t __user *argv,
 188                 compat_uptr_t __user *envp, struct pt_regs * regs);
 189
 190 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 191                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 192                 struct compat_timeval __user *tvp);
 193
 194 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 195
 196 #define BITS_TO_COMPAT_LONGS(bits) \
 197         (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 198
 199 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 200                        unsigned long bitmap_size);
 201 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 202                        unsigned long bitmap_size);
 203 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 204 int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
 205 int get_compat_sigevent(struct sigevent *event,
 206                 const struct compat_sigevent __user *u_event);
 207
 208 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 209                                         struct compat_timeval *rhs)
 210 {
 211         if (lhs->tv_sec < rhs->tv_sec)
 212                 return -1;
 213         if (lhs->tv_sec > rhs->tv_sec)
 214                 return 1;
 215         return lhs->tv_usec - rhs->tv_usec;
 216 }
 217
 218 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 219                                         struct compat_timespec *rhs)
 220 {
 221         if (lhs->tv_sec < rhs->tv_sec)
 222                 return -1;
 223         if (lhs->tv_sec > rhs->tv_sec)
 224                 return 1;
 225         return lhs->tv_nsec - rhs->tv_nsec;
 226 }
 227
 228 extern int get_compat_itimerspec(struct itimerspec *dst,
 229                                  const struct compat_itimerspec __user *src);
 230 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 231                                  const struct itimerspec *src);
 232
 233 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 234
 235 extern int compat_printk(const char *fmt, ...);
 236 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
 237
 238 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 239                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 240                 const compat_ulong_t __user *new_nodes);
 241
 242 /*
 243  * epoll (fs/eventpoll.c) compat bits follow ...
 244  */
 245 #ifndef CONFIG_HAS_COMPAT_EPOLL_EVENT
 246 struct epoll_event;
 247 #define compat_epoll_event      epoll_event
 248 #else
 249 asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd,
 250                         struct compat_epoll_event __user *event);
 251 asmlinkage long compat_sys_epoll_wait(int epfd,
 252                         struct compat_epoll_event __user *events,
 253                         int maxevents, int timeout);
 254 #endif
 255 asmlinkage long compat_sys_epoll_pwait(int epfd,
 256                         struct compat_epoll_event __user *events,
 257                         int maxevents, int timeout,
 258                         const compat_sigset_t __user *sigmask,
 259                         compat_size_t sigsetsize);
 260
 261 asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename,
 262                                 struct compat_timespec __user *t, int flags);
 263
 264 asmlinkage long compat_sys_signalfd(int ufd,
 265                                 const compat_sigset_t __user *sigmask,
 266                                 compat_size_t sigsetsize);
 267 asmlinkage long compat_sys_timerfd(int ufd, int clockid, int flags,
 268                                 const struct compat_itimerspec __user *utmr);
 269
 270 #endif /* CONFIG_COMPAT */
 271 #endif /* _LINUX_COMPAT_H */