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 COMPAT_SYSCALL_DEFINE1(name, ...) \
  31         COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
  32 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
  33         COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
  34 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
  35         COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
  36 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
  37         COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
  38 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
  39         COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
  40 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
  41         COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
  42
  43 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
  44         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))\
  45                 __attribute__((alias(__stringify(compat_SyS##name))));  \
  46         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
  47         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__));\
  48         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
  49         {                                                               \
  50                 return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
  51         }                                                               \
  52         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
  53
  54 #ifndef compat_user_stack_pointer
  55 #define compat_user_stack_pointer() current_user_stack_pointer()
  56 #endif
  57 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
  58 typedef struct compat_sigaltstack {
  59         compat_uptr_t                   ss_sp;
  60         int                             ss_flags;
  61         compat_size_t                   ss_size;
  62 } compat_stack_t;
  63 #endif
  64
  65 #define compat_jiffies_to_clock_t(x)    \
  66                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  67
  68 typedef __compat_uid32_t        compat_uid_t;
  69 typedef __compat_gid32_t        compat_gid_t;
  70
  71 struct compat_sel_arg_struct;
  72 struct rusage;
  73
  74 struct compat_itimerspec {
  75         struct compat_timespec it_interval;
  76         struct compat_timespec it_value;
  77 };
  78
  79 struct compat_utimbuf {
  80         compat_time_t           actime;
  81         compat_time_t           modtime;
  82 };
  83
  84 struct compat_itimerval {
  85         struct compat_timeval   it_interval;
  86         struct compat_timeval   it_value;
  87 };
  88
  89 struct compat_tms {
  90         compat_clock_t          tms_utime;
  91         compat_clock_t          tms_stime;
  92         compat_clock_t          tms_cutime;
  93         compat_clock_t          tms_cstime;
  94 };
  95
  96 struct compat_timex {
  97         compat_uint_t modes;
  98         compat_long_t offset;
  99         compat_long_t freq;
 100         compat_long_t maxerror;
 101         compat_long_t esterror;
 102         compat_int_t status;
 103         compat_long_t constant;
 104         compat_long_t precision;
 105         compat_long_t tolerance;
 106         struct compat_timeval time;
 107         compat_long_t tick;
 108         compat_long_t ppsfreq;
 109         compat_long_t jitter;
 110         compat_int_t shift;
 111         compat_long_t stabil;
 112         compat_long_t jitcnt;
 113         compat_long_t calcnt;
 114         compat_long_t errcnt;
 115         compat_long_t stbcnt;
 116         compat_int_t tai;
 117
 118         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 119         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 120         compat_int_t:32; compat_int_t:32; compat_int_t:32;
 121 };
 122
 123 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
 124
 125 typedef struct {
 126         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
 127 } compat_sigset_t;
 128
 129 struct compat_sigaction {
 130 #ifndef __ARCH_HAS_IRIX_SIGACTION
 131         compat_uptr_t                   sa_handler;
 132         compat_ulong_t                  sa_flags;
 133 #else
 134         compat_uint_t                   sa_flags;
 135         compat_uptr_t                   sa_handler;
 136 #endif
 137 #ifdef __ARCH_HAS_SA_RESTORER
 138         compat_uptr_t                   sa_restorer;
 139 #endif
 140         compat_sigset_t                 sa_mask __packed;
 141 };
 142
 143 /*
 144  * These functions operate strictly on struct compat_time*
 145  */
 146 extern int get_compat_timespec(struct timespec *,
 147                                const struct compat_timespec __user *);
 148 extern int put_compat_timespec(const struct timespec *,
 149                                struct compat_timespec __user *);
 150 extern int get_compat_timeval(struct timeval *,
 151                               const struct compat_timeval __user *);
 152 extern int put_compat_timeval(const struct timeval *,
 153                               struct compat_timeval __user *);
 154 /*
 155  * These functions operate on 32- or 64-bit specs depending on
 156  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments and the
 157  * naming as compat_get/put_ rather than get/put_compat_.
 158  */
 159 extern int compat_get_timespec(struct timespec *, const void __user *);
 160 extern int compat_put_timespec(const struct timespec *, void __user *);
 161 extern int compat_get_timeval(struct timeval *, const void __user *);
 162 extern int compat_put_timeval(const struct timeval *, void __user *);
 163
 164 struct compat_iovec {
 165         compat_uptr_t   iov_base;
 166         compat_size_t   iov_len;
 167 };
 168
 169 struct compat_rlimit {
 170         compat_ulong_t  rlim_cur;
 171         compat_ulong_t  rlim_max;
 172 };
 173
 174 struct compat_rusage {
 175         struct compat_timeval ru_utime;
 176         struct compat_timeval ru_stime;
 177         compat_long_t   ru_maxrss;
 178         compat_long_t   ru_ixrss;
 179         compat_long_t   ru_idrss;
 180         compat_long_t   ru_isrss;
 181         compat_long_t   ru_minflt;
 182         compat_long_t   ru_majflt;
 183         compat_long_t   ru_nswap;
 184         compat_long_t   ru_inblock;
 185         compat_long_t   ru_oublock;
 186         compat_long_t   ru_msgsnd;
 187         compat_long_t   ru_msgrcv;
 188         compat_long_t   ru_nsignals;
 189         compat_long_t   ru_nvcsw;
 190         compat_long_t   ru_nivcsw;
 191 };
 192
 193 extern int put_compat_rusage(const struct rusage *,
 194                              struct compat_rusage __user *);
 195
 196 struct compat_siginfo;
 197
 198 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 199                 struct compat_siginfo __user *, int,
 200                 struct compat_rusage __user *);
 201
 202 struct compat_dirent {
 203         u32             d_ino;
 204         compat_off_t    d_off;
 205         u16             d_reclen;
 206         char            d_name[256];
 207 };
 208
 209 struct compat_ustat {
 210         compat_daddr_t          f_tfree;
 211         compat_ino_t            f_tinode;
 212         char                    f_fname[6];
 213         char                    f_fpack[6];
 214 };
 215
 216 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 217
 218 typedef struct compat_sigevent {
 219         compat_sigval_t sigev_value;
 220         compat_int_t sigev_signo;
 221         compat_int_t sigev_notify;
 222         union {
 223                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 224                 compat_int_t _tid;
 225
 226                 struct {
 227                         compat_uptr_t _function;
 228                         compat_uptr_t _attribute;
 229                 } _sigev_thread;
 230         } _sigev_un;
 231 } compat_sigevent_t;
 232
 233 struct compat_ifmap {
 234         compat_ulong_t mem_start;
 235         compat_ulong_t mem_end;
 236         unsigned short base_addr;
 237         unsigned char irq;
 238         unsigned char dma;
 239         unsigned char port;
 240 };
 241
 242 struct compat_if_settings {
 243         unsigned int type;      /* Type of physical device or protocol */
 244         unsigned int size;      /* Size of the data allocated by the caller */
 245         compat_uptr_t ifs_ifsu; /* union of pointers */
 246 };
 247
 248 struct compat_ifreq {
 249         union {
 250                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 251         } ifr_ifrn;
 252         union {
 253                 struct  sockaddr ifru_addr;
 254                 struct  sockaddr ifru_dstaddr;
 255                 struct  sockaddr ifru_broadaddr;
 256                 struct  sockaddr ifru_netmask;
 257                 struct  sockaddr ifru_hwaddr;
 258                 short   ifru_flags;
 259                 compat_int_t    ifru_ivalue;
 260                 compat_int_t    ifru_mtu;
 261                 struct  compat_ifmap ifru_map;
 262                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
 263                 char    ifru_newname[IFNAMSIZ];
 264                 compat_caddr_t  ifru_data;
 265                 struct  compat_if_settings ifru_settings;
 266         } ifr_ifru;
 267 };
 268
 269 struct compat_ifconf {
 270         compat_int_t    ifc_len;                /* size of buffer */
 271         compat_caddr_t  ifcbuf;
 272 };
 273
 274 struct compat_robust_list {
 275         compat_uptr_t                   next;
 276 };
 277
 278 struct compat_robust_list_head {
 279         struct compat_robust_list       list;
 280         compat_long_t                   futex_offset;
 281         compat_uptr_t                   list_op_pending;
 282 };
 283
 284 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 285 struct compat_old_sigaction {
 286         compat_uptr_t                   sa_handler;
 287         compat_old_sigset_t             sa_mask;
 288         compat_ulong_t                  sa_flags;
 289         compat_uptr_t                   sa_restorer;
 290 };
 291 #endif
 292
 293 struct compat_statfs;
 294 struct compat_statfs64;
 295 struct compat_old_linux_dirent;
 296 struct compat_linux_dirent;
 297 struct linux_dirent64;
 298 struct compat_msghdr;
 299 struct compat_mmsghdr;
 300 struct compat_sysinfo;
 301 struct compat_sysctl_args;
 302 struct compat_kexec_segment;
 303 struct compat_mq_attr;
 304 struct compat_msgbuf;
 305
 306 extern void compat_exit_robust_list(struct task_struct *curr);
 307
 308 asmlinkage long
 309 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 310                            compat_size_t len);
 311 asmlinkage long
 312 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 313                            compat_size_t __user *len_ptr);
 314
 315 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
 316 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
 317 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 318 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
 319                 compat_ssize_t msgsz, int msgflg);
 320 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
 321                 compat_ssize_t msgsz, long msgtyp, int msgflg);
 322 long compat_sys_msgctl(int first, int second, void __user *uptr);
 323 long compat_sys_shmctl(int first, int second, void __user *uptr);
 324 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 325                 unsigned nsems, const struct compat_timespec __user *timeout);
 326 asmlinkage long compat_sys_keyctl(u32 option,
 327                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 328 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 329
 330 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
 331                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 332 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
 333                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 334 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
 335                 const struct compat_iovec __user *vec,
 336                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 337 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
 338                 const struct compat_iovec __user *vec,
 339                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 340 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 341
 342 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
 343                      const compat_uptr_t __user *envp);
 344
 345 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 346                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 347                 struct compat_timeval __user *tvp);
 348
 349 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
 350
 351 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 352                                  compat_uint_t __user *stat_addr, int options,
 353                                  struct compat_rusage __user *ru);
 354
 355 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 356
 357 #define BITS_TO_COMPAT_LONGS(bits) \
 358         (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 359
 360 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 361                        unsigned long bitmap_size);
 362 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 363                        unsigned long bitmap_size);
 364 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 365 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
 366 int get_compat_sigevent(struct sigevent *event,
 367                 const struct compat_sigevent __user *u_event);
 368 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
 369                                   struct compat_siginfo __user *uinfo);
 370 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 371 asmlinkage long compat_sys_sigaction(int sig,
 372                                    const struct compat_old_sigaction __user *act,
 373                                    struct compat_old_sigaction __user *oact);
 374 #endif
 375
 376 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 377                                         struct compat_timeval *rhs)
 378 {
 379         if (lhs->tv_sec < rhs->tv_sec)
 380                 return -1;
 381         if (lhs->tv_sec > rhs->tv_sec)
 382                 return 1;
 383         return lhs->tv_usec - rhs->tv_usec;
 384 }
 385
 386 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 387                                         struct compat_timespec *rhs)
 388 {
 389         if (lhs->tv_sec < rhs->tv_sec)
 390                 return -1;
 391         if (lhs->tv_sec > rhs->tv_sec)
 392                 return 1;
 393         return lhs->tv_nsec - rhs->tv_nsec;
 394 }
 395
 396 extern int get_compat_itimerspec(struct itimerspec *dst,
 397                                  const struct compat_itimerspec __user *src);
 398 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 399                                  const struct itimerspec *src);
 400
 401 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 402                 struct timezone __user *tz);
 403 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 404                 struct timezone __user *tz);
 405
 406 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 407
 408 extern int compat_printk(const char *fmt, ...);
 409 extern void sigset_from_compat(sigset_t *set, const compat_sigset_t *compat);
 410 extern void sigset_to_compat(compat_sigset_t *compat, const sigset_t *set);
 411
 412 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 413                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 414                 const compat_ulong_t __user *new_nodes);
 415
 416 extern int compat_ptrace_request(struct task_struct *child,
 417                                  compat_long_t request,
 418                                  compat_ulong_t addr, compat_ulong_t data);
 419
 420 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 421                                compat_ulong_t addr, compat_ulong_t data);
 422 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 423                                   compat_long_t addr, compat_long_t data);
 424
 425 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
 426 /*
 427  * epoll (fs/eventpoll.c) compat bits follow ...
 428  */
 429 struct epoll_event;     /* fortunately, this one is fixed-layout */
 430 asmlinkage long compat_sys_epoll_pwait(int epfd,
 431                         struct epoll_event __user *events,
 432                         int maxevents, int timeout,
 433                         const compat_sigset_t __user *sigmask,
 434                         compat_size_t sigsetsize);
 435
 436 asmlinkage long compat_sys_utime(const char __user *filename,
 437                                  struct compat_utimbuf __user *t);
 438 asmlinkage long compat_sys_utimensat(unsigned int dfd,
 439                                      const char __user *filename,
 440                                      struct compat_timespec __user *t,
 441                                      int flags);
 442
 443 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
 444 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
 445 asmlinkage long compat_sys_signalfd(int ufd,
 446                                     const compat_sigset_t __user *sigmask,
 447                                     compat_size_t sigsetsize);
 448 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 449                                    const struct compat_itimerspec __user *utmr,
 450                                    struct compat_itimerspec __user *otmr);
 451 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 452                                    struct compat_itimerspec __user *otmr);
 453
 454 asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page,
 455                                       __u32 __user *pages,
 456                                       const int __user *nodes,
 457                                       int __user *status,
 458                                       int flags);
 459 asmlinkage long compat_sys_futimesat(unsigned int dfd,
 460                                      const char __user *filename,
 461                                      struct compat_timeval __user *t);
 462 asmlinkage long compat_sys_utimes(const char __user *filename,
 463                                   struct compat_timeval __user *t);
 464 asmlinkage long compat_sys_newstat(const char __user *filename,
 465                                    struct compat_stat __user *statbuf);
 466 asmlinkage long compat_sys_newlstat(const char __user *filename,
 467                                     struct compat_stat __user *statbuf);
 468 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
 469                                       const char __user *filename,
 470                                       struct compat_stat __user *statbuf,
 471                                       int flag);
 472 asmlinkage long compat_sys_newfstat(unsigned int fd,
 473                                     struct compat_stat __user *statbuf);
 474 asmlinkage long compat_sys_statfs(const char __user *pathname,
 475                                   struct compat_statfs __user *buf);
 476 asmlinkage long compat_sys_fstatfs(unsigned int fd,
 477                                    struct compat_statfs __user *buf);
 478 asmlinkage long compat_sys_statfs64(const char __user *pathname,
 479                                     compat_size_t sz,
 480                                     struct compat_statfs64 __user *buf);
 481 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
 482                                      struct compat_statfs64 __user *buf);
 483 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
 484                                    unsigned long arg);
 485 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
 486                                  unsigned long arg);
 487 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
 488 asmlinkage long compat_sys_io_getevents(aio_context_t ctx_id,
 489                                         unsigned long min_nr,
 490                                         unsigned long nr,
 491                                         struct io_event __user *events,
 492                                         struct compat_timespec __user *timeout);
 493 asmlinkage long compat_sys_io_submit(aio_context_t ctx_id, int nr,
 494                                      u32 __user *iocb);
 495 asmlinkage long compat_sys_mount(const char __user *dev_name,
 496                                  const char __user *dir_name,
 497                                  const char __user *type, unsigned long flags,
 498                                  const void __user *data);
 499 asmlinkage long compat_sys_old_readdir(unsigned int fd,
 500                                        struct compat_old_linux_dirent __user *,
 501                                        unsigned int count);
 502 asmlinkage long compat_sys_getdents(unsigned int fd,
 503                                     struct compat_linux_dirent __user *dirent,
 504                                     unsigned int count);
 505 asmlinkage long compat_sys_getdents64(unsigned int fd,
 506                                       struct linux_dirent64 __user *dirent,
 507                                       unsigned int count);
 508 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
 509                                     unsigned int nr_segs, unsigned int flags);
 510 asmlinkage long compat_sys_open(const char __user *filename, int flags,
 511                                 umode_t mode);
 512 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
 513                                   int flags, umode_t mode);
 514 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
 515                                              struct file_handle __user *handle,
 516                                              int flags);
 517 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
 518 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
 519 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
 520                                     compat_ulong_t __user *outp,
 521                                     compat_ulong_t __user *exp,
 522                                     struct compat_timespec __user *tsp,
 523                                     void __user *sig);
 524 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
 525                                  unsigned int nfds,
 526                                  struct compat_timespec __user *tsp,
 527                                  const compat_sigset_t __user *sigmask,
 528                                  compat_size_t sigsetsize);
 529 asmlinkage long compat_sys_signalfd4(int ufd,
 530                                      const compat_sigset_t __user *sigmask,
 531                                      compat_size_t sigsetsize, int flags);
 532 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
 533                                          compat_ulong_t __user *nmask,
 534                                          compat_ulong_t maxnode,
 535                                          compat_ulong_t addr,
 536                                          compat_ulong_t flags);
 537 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
 538                                          compat_ulong_t maxnode);
 539 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
 540                                  compat_ulong_t mode,
 541                                  compat_ulong_t __user *nmask,
 542                                  compat_ulong_t maxnode, compat_ulong_t flags);
 543
 544 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 545                                       char __user *optval, unsigned int optlen);
 546 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
 547                                    unsigned flags);
 548 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 549                                     unsigned vlen, unsigned int flags);
 550 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
 551                                    unsigned int flags);
 552 asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len,
 553                                 unsigned flags);
 554 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
 555                             unsigned flags, struct sockaddr __user *addr,
 556                             int __user *addrlen);
 557 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 558                                     unsigned vlen, unsigned int flags,
 559                                     struct compat_timespec __user *timeout);
 560 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
 561                                      struct compat_timespec __user *rmtp);
 562 asmlinkage long compat_sys_getitimer(int which,
 563                                      struct compat_itimerval __user *it);
 564 asmlinkage long compat_sys_setitimer(int which,
 565                                      struct compat_itimerval __user *in,
 566                                      struct compat_itimerval __user *out);
 567 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
 568 asmlinkage long compat_sys_setrlimit(unsigned int resource,
 569                                      struct compat_rlimit __user *rlim);
 570 asmlinkage long compat_sys_getrlimit(unsigned int resource,
 571                                      struct compat_rlimit __user *rlim);
 572 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
 573 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 574                                      unsigned int len,
 575                                      compat_ulong_t __user *user_mask_ptr);
 576 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
 577                                      unsigned int len,
 578                                      compat_ulong_t __user *user_mask_ptr);
 579 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
 580                         struct compat_sigevent __user *timer_event_spec,
 581                         timer_t __user *created_timer_id);
 582 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
 583                                          struct compat_itimerspec __user *new,
 584                                          struct compat_itimerspec __user *old);
 585 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
 586                                  struct compat_itimerspec __user *setting);
 587 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
 588                                          struct compat_timespec __user *tp);
 589 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
 590                                          struct compat_timespec __user *tp);
 591 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
 592                                          struct compat_timex __user *tp);
 593 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
 594                                         struct compat_timespec __user *tp);
 595 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
 596                                            struct compat_timespec __user *rqtp,
 597                                            struct compat_timespec __user *rmtp);
 598 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
 599                 struct compat_siginfo __user *uinfo,
 600                 struct compat_timespec __user *uts, compat_size_t sigsetsize);
 601 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
 602                                          compat_size_t sigsetsize);
 603 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
 604                                           compat_sigset_t __user *oset,
 605                                           compat_size_t sigsetsize);
 606 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
 607                                          compat_size_t sigsetsize);
 608 #ifndef CONFIG_ODD_RT_SIGACTION
 609 asmlinkage long compat_sys_rt_sigaction(int,
 610                                  const struct compat_sigaction __user *,
 611                                  struct compat_sigaction __user *,
 612                                  compat_size_t);
 613 #endif
 614 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
 615                                 struct compat_siginfo __user *uinfo);
 616 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 617 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
 618                                  unsigned long arg);
 619 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 620                 struct compat_timespec __user *utime, u32 __user *uaddr2,
 621                 u32 val3);
 622 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 623                                       char __user *optval, int __user *optlen);
 624 asmlinkage long compat_sys_kexec_load(unsigned long entry,
 625                                       unsigned long nr_segments,
 626                                       struct compat_kexec_segment __user *,
 627                                       unsigned long flags);
 628 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
 629                         const struct compat_mq_attr __user *u_mqstat,
 630                         struct compat_mq_attr __user *u_omqstat);
 631 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 632                         const struct compat_sigevent __user *u_notification);
 633 asmlinkage long compat_sys_mq_open(const char __user *u_name,
 634                         int oflag, compat_mode_t mode,
 635                         struct compat_mq_attr __user *u_attr);
 636 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 637                         const char __user *u_msg_ptr,
 638                         size_t msg_len, unsigned int msg_prio,
 639                         const struct compat_timespec __user *u_abs_timeout);
 640 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 641                         char __user *u_msg_ptr,
 642                         size_t msg_len, unsigned int __user *u_msg_prio,
 643                         const struct compat_timespec __user *u_abs_timeout);
 644 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
 645 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
 646
 647 extern ssize_t compat_rw_copy_check_uvector(int type,
 648                 const struct compat_iovec __user *uvector,
 649                 unsigned long nr_segs,
 650                 unsigned long fast_segs, struct iovec *fast_pointer,
 651                 struct iovec **ret_pointer);
 652
 653 extern void __user *compat_alloc_user_space(unsigned long len);
 654
 655 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
 656                 const struct compat_iovec __user *lvec,
 657                 unsigned long liovcnt, const struct compat_iovec __user *rvec,
 658                 unsigned long riovcnt, unsigned long flags);
 659 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 660                 const struct compat_iovec __user *lvec,
 661                 unsigned long liovcnt, const struct compat_iovec __user *rvec,
 662                 unsigned long riovcnt, unsigned long flags);
 663
 664 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 665                                     compat_off_t __user *offset, compat_size_t count);
 666 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 667                                     compat_loff_t __user *offset, compat_size_t count);
 668 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
 669                                        compat_stack_t __user *uoss_ptr);
 670
 671 int compat_restore_altstack(const compat_stack_t __user *uss);
 672 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 673 #define compat_save_altstack_ex(uss, sp) do { \
 674         compat_stack_t __user *__uss = uss; \
 675         struct task_struct *t = current; \
 676         put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
 677         put_user_ex(sas_ss_flags(sp), &__uss->ss_flags); \
 678         put_user_ex(t->sas_ss_size, &__uss->ss_size); \
 679 } while (0);
 680
 681 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
 682                                                  struct compat_timespec __user *interval);
 683
 684 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
 685                                             int, const char __user *);
 686 #else
 687
 688 #define is_compat_task() (0)
 689
 690 #endif /* CONFIG_COMPAT */
 691 #endif /* _LINUX_COMPAT_H */