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 #include <linux/socket.h>
  14 #include <linux/if.h>
  15 #include <linux/fs.h>
  16 #include <linux/aio_abi.h>      /* for aio_context_t */
  17
  18 #include <asm/compat.h>
  19 #include <asm/siginfo.h>
  20 #include <asm/signal.h>
  21
  22 #ifndef COMPAT_USE_64BIT_TIME
  23 #define COMPAT_USE_64BIT_TIME 0
  24 #endif
  25
  26 #ifndef __SC_DELOUSE
  27 #define __SC_DELOUSE(t,v) ((t)(unsigned long)(v))
  28 #endif
  29
  30 #define __SC_CCAST1(t1, a1)      __SC_DELOUSE(t1,a1)
  31 #define __SC_CCAST2(t2, a2, ...) __SC_DELOUSE(t2,a2), __SC_CCAST1(__VA_ARGS__)
  32 #define __SC_CCAST3(t3, a3, ...) __SC_DELOUSE(t3,a3), __SC_CCAST2(__VA_ARGS__)
  33 #define __SC_CCAST4(t4, a4, ...) __SC_DELOUSE(t4,a4), __SC_CCAST3(__VA_ARGS__)
  34 #define __SC_CCAST5(t5, a5, ...) __SC_DELOUSE(t5,a5), __SC_CCAST4(__VA_ARGS__)
  35 #define __SC_CCAST6(t6, a6, ...) __SC_DELOUSE(t6,a6), __SC_CCAST5(__VA_ARGS__)
  36 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
  37         COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
  38 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
  39         COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
  40 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
  41         COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
  42 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
  43         COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
  44 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
  45         COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
  46 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
  47         COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
  48
  49 #ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
  50
  51 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
  52         asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__));    \
  53         static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__));     \
  54         asmlinkage long compat_SyS##name(__SC_LONG##x(__VA_ARGS__))     \
  55         {                                                               \
  56                 return (long) C_SYSC##name(__SC_CCAST##x(__VA_ARGS__)); \
  57         }                                                               \
  58         SYSCALL_ALIAS(compat_sys##name, compat_SyS##name);              \
  59         static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__))
  60
  61 #else /* CONFIG_HAVE_SYSCALL_WRAPPERS */
  62
  63 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
  64         asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__))
  65
  66 #endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */
  67
  68 #ifndef compat_user_stack_pointer
  69 #define compat_user_stack_pointer() current_user_stack_pointer()
  70 #endif
  71 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
  72 typedef struct compat_sigaltstack {
  73         compat_uptr_t                   ss_sp;
  74         int                             ss_flags;
  75         compat_size_t                   ss_size;
  76 } compat_stack_t;
  77 #endif
  78
  79 #define compat_jiffies_to_clock_t(x)    \
  80                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  81
  82 typedef __compat_uid32_t        compat_uid_t;
  83 typedef __compat_gid32_t        compat_gid_t;
  84
  85 struct compat_sel_arg_struct;
  86 struct rusage;
  87
  88 struct compat_itimerspec {
  89         struct compat_timespec it_interval;
  90         struct compat_timespec it_value;
  91 };
  92
  93 struct compat_utimbuf {
  94         compat_time_t           actime;
  95         compat_time_t           modtime;
  96 };
  97
  98 struct compat_itimerval {
  99         struct compat_timeval   it_interval;
 100         struct compat_timeval   it_value;
 101 };
 102
 103 struct compat_tms {
 104         compat_clock_t          tms_utime;
 105         compat_clock_t          tms_stime;
 106         compat_clock_t          tms_cutime;
 107         compat_clock_t          tms_cstime;
 108 };
 109
 110 struct compat_timex {
 111         compat_uint_t modes;
 112         compat_long_t offset;
 113         compat_long_t freq;
 114         compat_long_t maxerror;
 115         compat_long_t esterror;
 116         compat_int_t status;
 117         compat_long_t constant;
 118         compat_long_t precision;
 119         compat_long_t tolerance;
 120         struct compat_timeval time;
 121         compat_long_t tick;
 122         compat_long_t ppsfreq;
 123         compat_long_t jitter;
 124         compat_int_t shift;
 125         compat_long_t stabil;
 126         compat_long_t jitcnt;
 127         compat_long_t calcnt;
 128         compat_long_t errcnt;
 129         compat_long_t stbcnt;
 130         compat_int_t tai;
 131
 132         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 133         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 134         compat_int_t:32; compat_int_t:32; compat_int_t:32;
 135 };
 136
 137 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
 138
 139 typedef struct {
 140         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
 141 } compat_sigset_t;
 142
 143 struct compat_sigaction {
 144 #ifndef __ARCH_HAS_ODD_SIGACTION
 145         compat_uptr_t                   sa_handler;
 146         compat_ulong_t                  sa_flags;
 147 #else
 148         compat_ulong_t                  sa_flags;
 149         compat_uptr_t                   sa_handler;
 150 #endif
 151 #ifdef __ARCH_HAS_SA_RESTORER
 152         compat_uptr_t                   sa_restorer;
 153 #endif
 154         compat_sigset_t                 sa_mask __packed;
 155 };
 156
 157 /*
 158  * These functions operate strictly on struct compat_time*
 159  */
 160 extern int get_compat_timespec(struct timespec *,
 161                                const struct compat_timespec __user *);
 162 extern int put_compat_timespec(const struct timespec *,
 163                                struct compat_timespec __user *);
 164 extern int get_compat_timeval(struct timeval *,
 165                               const struct compat_timeval __user *);
 166 extern int put_compat_timeval(const struct timeval *,
 167                               struct compat_timeval __user *);
 168 /*
 169  * These functions operate on 32- or 64-bit specs depending on
 170  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments and the
 171  * naming as compat_get/put_ rather than get/put_compat_.
 172  */
 173 extern int compat_get_timespec(struct timespec *, const void __user *);
 174 extern int compat_put_timespec(const struct timespec *, void __user *);
 175 extern int compat_get_timeval(struct timeval *, const void __user *);
 176 extern int compat_put_timeval(const struct timeval *, void __user *);
 177
 178 struct compat_iovec {
 179         compat_uptr_t   iov_base;
 180         compat_size_t   iov_len;
 181 };
 182
 183 struct compat_rlimit {
 184         compat_ulong_t  rlim_cur;
 185         compat_ulong_t  rlim_max;
 186 };
 187
 188 struct compat_rusage {
 189         struct compat_timeval ru_utime;
 190         struct compat_timeval ru_stime;
 191         compat_long_t   ru_maxrss;
 192         compat_long_t   ru_ixrss;
 193         compat_long_t   ru_idrss;
 194         compat_long_t   ru_isrss;
 195         compat_long_t   ru_minflt;
 196         compat_long_t   ru_majflt;
 197         compat_long_t   ru_nswap;
 198         compat_long_t   ru_inblock;
 199         compat_long_t   ru_oublock;
 200         compat_long_t   ru_msgsnd;
 201         compat_long_t   ru_msgrcv;
 202         compat_long_t   ru_nsignals;
 203         compat_long_t   ru_nvcsw;
 204         compat_long_t   ru_nivcsw;
 205 };
 206
 207 extern int put_compat_rusage(const struct rusage *,
 208                              struct compat_rusage __user *);
 209
 210 struct compat_siginfo;
 211
 212 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 213                 struct compat_siginfo __user *, int,
 214                 struct compat_rusage __user *);
 215
 216 struct compat_dirent {
 217         u32             d_ino;
 218         compat_off_t    d_off;
 219         u16             d_reclen;
 220         char            d_name[256];
 221 };
 222
 223 struct compat_ustat {
 224         compat_daddr_t          f_tfree;
 225         compat_ino_t            f_tinode;
 226         char                    f_fname[6];
 227         char                    f_fpack[6];
 228 };
 229
 230 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 231
 232 typedef struct compat_sigevent {
 233         compat_sigval_t sigev_value;
 234         compat_int_t sigev_signo;
 235         compat_int_t sigev_notify;
 236         union {
 237                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 238                 compat_int_t _tid;
 239
 240                 struct {
 241                         compat_uptr_t _function;
 242                         compat_uptr_t _attribute;
 243                 } _sigev_thread;
 244         } _sigev_un;
 245 } compat_sigevent_t;
 246
 247 struct compat_ifmap {
 248         compat_ulong_t mem_start;
 249         compat_ulong_t mem_end;
 250         unsigned short base_addr;
 251         unsigned char irq;
 252         unsigned char dma;
 253         unsigned char port;
 254 };
 255
 256 struct compat_if_settings {
 257         unsigned int type;      /* Type of physical device or protocol */
 258         unsigned int size;      /* Size of the data allocated by the caller */
 259         compat_uptr_t ifs_ifsu; /* union of pointers */
 260 };
 261
 262 struct compat_ifreq {
 263         union {
 264                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 265         } ifr_ifrn;
 266         union {
 267                 struct  sockaddr ifru_addr;
 268                 struct  sockaddr ifru_dstaddr;
 269                 struct  sockaddr ifru_broadaddr;
 270                 struct  sockaddr ifru_netmask;
 271                 struct  sockaddr ifru_hwaddr;
 272                 short   ifru_flags;
 273                 compat_int_t    ifru_ivalue;
 274                 compat_int_t    ifru_mtu;
 275                 struct  compat_ifmap ifru_map;
 276                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
 277                 char    ifru_newname[IFNAMSIZ];
 278                 compat_caddr_t  ifru_data;
 279                 struct  compat_if_settings ifru_settings;
 280         } ifr_ifru;
 281 };
 282
 283 struct compat_ifconf {
 284         compat_int_t    ifc_len;                /* size of buffer */
 285         compat_caddr_t  ifcbuf;
 286 };
 287
 288 struct compat_robust_list {
 289         compat_uptr_t                   next;
 290 };
 291
 292 struct compat_robust_list_head {
 293         struct compat_robust_list       list;
 294         compat_long_t                   futex_offset;
 295         compat_uptr_t                   list_op_pending;
 296 };
 297
 298 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 299 struct compat_old_sigaction {
 300         compat_uptr_t                   sa_handler;
 301         compat_old_sigset_t             sa_mask;
 302         compat_ulong_t                  sa_flags;
 303         compat_uptr_t                   sa_restorer;
 304 };
 305 #endif
 306
 307 struct compat_statfs;
 308 struct compat_statfs64;
 309 struct compat_old_linux_dirent;
 310 struct compat_linux_dirent;
 311 struct linux_dirent64;
 312 struct compat_msghdr;
 313 struct compat_mmsghdr;
 314 struct compat_sysinfo;
 315 struct compat_sysctl_args;
 316 struct compat_kexec_segment;
 317 struct compat_mq_attr;
 318 struct compat_msgbuf;
 319
 320 extern void compat_exit_robust_list(struct task_struct *curr);
 321
 322 asmlinkage long
 323 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 324                            compat_size_t len);
 325 asmlinkage long
 326 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 327                            compat_size_t __user *len_ptr);
 328
 329 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
 330 long compat_sys_semctl(int first, int second, int third, void __user *uptr);
 331 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
 332 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 333                 int version, void __user *uptr);
 334 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 335                 void __user *uptr);
 336 #else
 337 long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 338 long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
 339                 compat_ssize_t msgsz, int msgflg);
 340 long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
 341                 compat_ssize_t msgsz, long msgtyp, int msgflg);
 342 long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
 343 #endif
 344 long compat_sys_msgctl(int first, int second, void __user *uptr);
 345 long compat_sys_shmctl(int first, int second, void __user *uptr);
 346 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 347                 unsigned nsems, const struct compat_timespec __user *timeout);
 348 asmlinkage long compat_sys_keyctl(u32 option,
 349                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 350 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 351
 352 asmlinkage ssize_t compat_sys_readv(unsigned long fd,
 353                 const struct compat_iovec __user *vec, unsigned long vlen);
 354 asmlinkage ssize_t compat_sys_writev(unsigned long fd,
 355                 const struct compat_iovec __user *vec, unsigned long vlen);
 356 asmlinkage ssize_t compat_sys_preadv(unsigned long fd,
 357                 const struct compat_iovec __user *vec,
 358                 unsigned long vlen, u32 pos_low, u32 pos_high);
 359 asmlinkage ssize_t compat_sys_pwritev(unsigned long fd,
 360                 const struct compat_iovec __user *vec,
 361                 unsigned long vlen, u32 pos_low, u32 pos_high);
 362 asmlinkage long comat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 363
 364 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
 365                      const compat_uptr_t __user *envp);
 366
 367 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 368                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 369                 struct compat_timeval __user *tvp);
 370
 371 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
 372
 373 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 374                                  compat_uint_t __user *stat_addr, int options,
 375                                  struct compat_rusage __user *ru);
 376
 377 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 378
 379 #define BITS_TO_COMPAT_LONGS(bits) \
 380         (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 381
 382 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 383                        unsigned long bitmap_size);
 384 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 385                        unsigned long bitmap_size);
 386 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 387 int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
 388 int get_compat_sigevent(struct sigevent *event,
 389                 const struct compat_sigevent __user *u_event);
 390 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
 391                                   struct compat_siginfo __user *uinfo);
 392 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 393 asmlinkage long compat_sys_sigaction(int sig,
 394                                    const struct compat_old_sigaction __user *act,
 395                                    struct compat_old_sigaction __user *oact);
 396 #endif
 397
 398 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 399                                         struct compat_timeval *rhs)
 400 {
 401         if (lhs->tv_sec < rhs->tv_sec)
 402                 return -1;
 403         if (lhs->tv_sec > rhs->tv_sec)
 404                 return 1;
 405         return lhs->tv_usec - rhs->tv_usec;
 406 }
 407
 408 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 409                                         struct compat_timespec *rhs)
 410 {
 411         if (lhs->tv_sec < rhs->tv_sec)
 412                 return -1;
 413         if (lhs->tv_sec > rhs->tv_sec)
 414                 return 1;
 415         return lhs->tv_nsec - rhs->tv_nsec;
 416 }
 417
 418 extern int get_compat_itimerspec(struct itimerspec *dst,
 419                                  const struct compat_itimerspec __user *src);
 420 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 421                                  const struct itimerspec *src);
 422
 423 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 424                 struct timezone __user *tz);
 425 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 426                 struct timezone __user *tz);
 427
 428 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 429
 430 extern int compat_printk(const char *fmt, ...);
 431 extern void sigset_from_compat(sigset_t *set, const compat_sigset_t *compat);
 432 extern void sigset_to_compat(compat_sigset_t *compat, const sigset_t *set);
 433
 434 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 435                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 436                 const compat_ulong_t __user *new_nodes);
 437
 438 extern int compat_ptrace_request(struct task_struct *child,
 439                                  compat_long_t request,
 440                                  compat_ulong_t addr, compat_ulong_t data);
 441
 442 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 443                                compat_ulong_t addr, compat_ulong_t data);
 444 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 445                                   compat_long_t addr, compat_long_t data);
 446
 447 /*
 448  * epoll (fs/eventpoll.c) compat bits follow ...
 449  */
 450 struct epoll_event;
 451 #define compat_epoll_event      epoll_event
 452 asmlinkage long compat_sys_epoll_pwait(int epfd,
 453                         struct compat_epoll_event __user *events,
 454                         int maxevents, int timeout,
 455                         const compat_sigset_t __user *sigmask,
 456                         compat_size_t sigsetsize);
 457
 458 asmlinkage long compat_sys_utime(const char __user *filename,
 459                                  struct compat_utimbuf __user *t);
 460 asmlinkage long compat_sys_utimensat(unsigned int dfd,
 461                                      const char __user *filename,
 462                                      struct compat_timespec __user *t,
 463                                      int flags);
 464
 465 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
 466 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
 467 asmlinkage long compat_sys_signalfd(int ufd,
 468                                     const compat_sigset_t __user *sigmask,
 469                                     compat_size_t sigsetsize);
 470 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 471                                    const struct compat_itimerspec __user *utmr,
 472                                    struct compat_itimerspec __user *otmr);
 473 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 474                                    struct compat_itimerspec __user *otmr);
 475
 476 asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page,
 477                                       __u32 __user *pages,
 478                                       const int __user *nodes,
 479                                       int __user *status,
 480                                       int flags);
 481 asmlinkage long compat_sys_futimesat(unsigned int dfd,
 482                                      const char __user *filename,
 483                                      struct compat_timeval __user *t);
 484 asmlinkage long compat_sys_utimes(const char __user *filename,
 485                                   struct compat_timeval __user *t);
 486 asmlinkage long compat_sys_newstat(const char __user *filename,
 487                                    struct compat_stat __user *statbuf);
 488 asmlinkage long compat_sys_newlstat(const char __user *filename,
 489                                     struct compat_stat __user *statbuf);
 490 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
 491                                       const char __user *filename,
 492                                       struct compat_stat __user *statbuf,
 493                                       int flag);
 494 asmlinkage long compat_sys_newfstat(unsigned int fd,
 495                                     struct compat_stat __user *statbuf);
 496 asmlinkage long compat_sys_statfs(const char __user *pathname,
 497                                   struct compat_statfs __user *buf);
 498 asmlinkage long compat_sys_fstatfs(unsigned int fd,
 499                                    struct compat_statfs __user *buf);
 500 asmlinkage long compat_sys_statfs64(const char __user *pathname,
 501                                     compat_size_t sz,
 502                                     struct compat_statfs64 __user *buf);
 503 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
 504                                      struct compat_statfs64 __user *buf);
 505 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
 506                                    unsigned long arg);
 507 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
 508                                  unsigned long arg);
 509 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
 510 asmlinkage long compat_sys_io_getevents(aio_context_t ctx_id,
 511                                         unsigned long min_nr,
 512                                         unsigned long nr,
 513                                         struct io_event __user *events,
 514                                         struct compat_timespec __user *timeout);
 515 asmlinkage long compat_sys_io_submit(aio_context_t ctx_id, int nr,
 516                                      u32 __user *iocb);
 517 asmlinkage long compat_sys_mount(const char __user *dev_name,
 518                                  const char __user *dir_name,
 519                                  const char __user *type, unsigned long flags,
 520                                  const void __user *data);
 521 asmlinkage long compat_sys_old_readdir(unsigned int fd,
 522                                        struct compat_old_linux_dirent __user *,
 523                                        unsigned int count);
 524 asmlinkage long compat_sys_getdents(unsigned int fd,
 525                                     struct compat_linux_dirent __user *dirent,
 526                                     unsigned int count);
 527 asmlinkage long compat_sys_getdents64(unsigned int fd,
 528                                       struct linux_dirent64 __user *dirent,
 529                                       unsigned int count);
 530 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
 531                                     unsigned int nr_segs, unsigned int flags);
 532 asmlinkage long compat_sys_open(const char __user *filename, int flags,
 533                                 umode_t mode);
 534 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
 535                                   int flags, umode_t mode);
 536 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
 537                                              struct file_handle __user *handle,
 538                                              int flags);
 539 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
 540 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
 541 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
 542                                     compat_ulong_t __user *outp,
 543                                     compat_ulong_t __user *exp,
 544                                     struct compat_timespec __user *tsp,
 545                                     void __user *sig);
 546 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
 547                                  unsigned int nfds,
 548                                  struct compat_timespec __user *tsp,
 549                                  const compat_sigset_t __user *sigmask,
 550                                  compat_size_t sigsetsize);
 551 asmlinkage long compat_sys_signalfd4(int ufd,
 552                                      const compat_sigset_t __user *sigmask,
 553                                      compat_size_t sigsetsize, int flags);
 554 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
 555                                          compat_ulong_t __user *nmask,
 556                                          compat_ulong_t maxnode,
 557                                          compat_ulong_t addr,
 558                                          compat_ulong_t flags);
 559 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
 560                                          compat_ulong_t maxnode);
 561 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
 562                                  compat_ulong_t mode,
 563                                  compat_ulong_t __user *nmask,
 564                                  compat_ulong_t maxnode, compat_ulong_t flags);
 565
 566 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 567                                       char __user *optval, unsigned int optlen);
 568 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
 569                                    unsigned flags);
 570 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 571                                     unsigned vlen, unsigned int flags);
 572 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
 573                                    unsigned int flags);
 574 asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len,
 575                                 unsigned flags);
 576 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
 577                             unsigned flags, struct sockaddr __user *addr,
 578                             int __user *addrlen);
 579 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 580                                     unsigned vlen, unsigned int flags,
 581                                     struct compat_timespec __user *timeout);
 582 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
 583                                      struct compat_timespec __user *rmtp);
 584 asmlinkage long compat_sys_getitimer(int which,
 585                                      struct compat_itimerval __user *it);
 586 asmlinkage long compat_sys_setitimer(int which,
 587                                      struct compat_itimerval __user *in,
 588                                      struct compat_itimerval __user *out);
 589 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
 590 asmlinkage long compat_sys_setrlimit(unsigned int resource,
 591                                      struct compat_rlimit __user *rlim);
 592 asmlinkage long compat_sys_getrlimit(unsigned int resource,
 593                                      struct compat_rlimit __user *rlim);
 594 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
 595 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 596                                      unsigned int len,
 597                                      compat_ulong_t __user *user_mask_ptr);
 598 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
 599                                      unsigned int len,
 600                                      compat_ulong_t __user *user_mask_ptr);
 601 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
 602                         struct compat_sigevent __user *timer_event_spec,
 603                         timer_t __user *created_timer_id);
 604 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
 605                                          struct compat_itimerspec __user *new,
 606                                          struct compat_itimerspec __user *old);
 607 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
 608                                  struct compat_itimerspec __user *setting);
 609 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
 610                                          struct compat_timespec __user *tp);
 611 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
 612                                          struct compat_timespec __user *tp);
 613 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
 614                                          struct compat_timex __user *tp);
 615 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
 616                                         struct compat_timespec __user *tp);
 617 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
 618                                            struct compat_timespec __user *rqtp,
 619                                            struct compat_timespec __user *rmtp);
 620 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
 621                 struct compat_siginfo __user *uinfo,
 622                 struct compat_timespec __user *uts, compat_size_t sigsetsize);
 623 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
 624                                          compat_size_t sigsetsize);
 625 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
 626                                           compat_sigset_t __user *oset,
 627                                           compat_size_t sigsetsize);
 628 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
 629                                          compat_size_t sigsetsize);
 630 #ifndef CONFIG_ODD_RT_SIGACTION
 631 asmlinkage long compat_sys_rt_sigaction(int,
 632                                  const struct compat_sigaction __user *,
 633                                  struct compat_sigaction __user *,
 634                                  compat_size_t);
 635 #endif
 636 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
 637                                 struct compat_siginfo __user *uinfo);
 638 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 639 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
 640                                  unsigned long arg);
 641 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 642                 struct compat_timespec __user *utime, u32 __user *uaddr2,
 643                 u32 val3);
 644 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 645                                       char __user *optval, int __user *optlen);
 646 asmlinkage long compat_sys_kexec_load(unsigned long entry,
 647                                       unsigned long nr_segments,
 648                                       struct compat_kexec_segment __user *,
 649                                       unsigned long flags);
 650 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
 651                         const struct compat_mq_attr __user *u_mqstat,
 652                         struct compat_mq_attr __user *u_omqstat);
 653 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 654                         const struct compat_sigevent __user *u_notification);
 655 asmlinkage long compat_sys_mq_open(const char __user *u_name,
 656                         int oflag, compat_mode_t mode,
 657                         struct compat_mq_attr __user *u_attr);
 658 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 659                         const char __user *u_msg_ptr,
 660                         size_t msg_len, unsigned int msg_prio,
 661                         const struct compat_timespec __user *u_abs_timeout);
 662 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 663                         char __user *u_msg_ptr,
 664                         size_t msg_len, unsigned int __user *u_msg_prio,
 665                         const struct compat_timespec __user *u_abs_timeout);
 666 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
 667 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
 668
 669 extern ssize_t compat_rw_copy_check_uvector(int type,
 670                 const struct compat_iovec __user *uvector,
 671                 unsigned long nr_segs,
 672                 unsigned long fast_segs, struct iovec *fast_pointer,
 673                 struct iovec **ret_pointer);
 674
 675 extern void __user *compat_alloc_user_space(unsigned long len);
 676
 677 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
 678                 const struct compat_iovec __user *lvec,
 679                 unsigned long liovcnt, const struct compat_iovec __user *rvec,
 680                 unsigned long riovcnt, unsigned long flags);
 681 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 682                 const struct compat_iovec __user *lvec,
 683                 unsigned long liovcnt, const struct compat_iovec __user *rvec,
 684                 unsigned long riovcnt, unsigned long flags);
 685
 686 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 687                                     compat_off_t __user *offset, compat_size_t count);
 688 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
 689                                        compat_stack_t __user *uoss_ptr);
 690
 691 int compat_restore_altstack(const compat_stack_t __user *uss);
 692 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 693
 694 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
 695                                                  struct compat_timespec __user *interval);
 696
 697 #else
 698
 699 #define is_compat_task() (0)
 700
 701 #endif /* CONFIG_COMPAT */
 702 #endif /* _LINUX_COMPAT_H */