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 #include <linux/types.h>
   9
  10 #ifdef CONFIG_COMPAT
  11
  12 #include <linux/stat.h>
  13 #include <linux/param.h>        /* for HZ */
  14 #include <linux/sem.h>
  15 #include <linux/socket.h>
  16 #include <linux/if.h>
  17 #include <linux/fs.h>
  18 #include <linux/aio_abi.h>      /* for aio_context_t */
  19 #include <linux/unistd.h>
  20
  21 #include <asm/compat.h>
  22 #include <asm/siginfo.h>
  23 #include <asm/signal.h>
  24
  25 #ifndef COMPAT_USE_64BIT_TIME
  26 #define COMPAT_USE_64BIT_TIME 0
  27 #endif
  28
  29 #ifndef __SC_DELOUSE
  30 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
  31 #endif
  32
  33 #define COMPAT_SYSCALL_DEFINE0(name) \
  34         asmlinkage long compat_sys_##name(void)
  35
  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 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
  50         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))\
  51                 __attribute__((alias(__stringify(compat_SyS##name))));  \
  52         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
  53         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__));\
  54         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
  55         {                                                               \
  56                 return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
  57         }                                                               \
  58         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
  59
  60 #ifndef compat_user_stack_pointer
  61 #define compat_user_stack_pointer() current_user_stack_pointer()
  62 #endif
  63 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
  64 typedef struct compat_sigaltstack {
  65         compat_uptr_t                   ss_sp;
  66         int                             ss_flags;
  67         compat_size_t                   ss_size;
  68 } compat_stack_t;
  69 #endif
  70
  71 #define compat_jiffies_to_clock_t(x)    \
  72                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  73
  74 typedef __compat_uid32_t        compat_uid_t;
  75 typedef __compat_gid32_t        compat_gid_t;
  76
  77 typedef compat_ulong_t          compat_aio_context_t;
  78
  79 struct compat_sel_arg_struct;
  80 struct rusage;
  81
  82 struct compat_itimerspec {
  83         struct compat_timespec it_interval;
  84         struct compat_timespec it_value;
  85 };
  86
  87 struct compat_utimbuf {
  88         compat_time_t           actime;
  89         compat_time_t           modtime;
  90 };
  91
  92 struct compat_itimerval {
  93         struct compat_timeval   it_interval;
  94         struct compat_timeval   it_value;
  95 };
  96
  97 struct itimerval;
  98 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
  99 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
 100
 101 struct compat_tms {
 102         compat_clock_t          tms_utime;
 103         compat_clock_t          tms_stime;
 104         compat_clock_t          tms_cutime;
 105         compat_clock_t          tms_cstime;
 106 };
 107
 108 struct compat_timex {
 109         compat_uint_t modes;
 110         compat_long_t offset;
 111         compat_long_t freq;
 112         compat_long_t maxerror;
 113         compat_long_t esterror;
 114         compat_int_t status;
 115         compat_long_t constant;
 116         compat_long_t precision;
 117         compat_long_t tolerance;
 118         struct compat_timeval time;
 119         compat_long_t tick;
 120         compat_long_t ppsfreq;
 121         compat_long_t jitter;
 122         compat_int_t shift;
 123         compat_long_t stabil;
 124         compat_long_t jitcnt;
 125         compat_long_t calcnt;
 126         compat_long_t errcnt;
 127         compat_long_t stbcnt;
 128         compat_int_t tai;
 129
 130         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 131         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 132         compat_int_t:32; compat_int_t:32; compat_int_t:32;
 133 };
 134
 135 struct timex;
 136 int compat_get_timex(struct timex *, const struct compat_timex __user *);
 137 int compat_put_timex(struct compat_timex __user *, const struct timex *);
 138
 139 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
 140
 141 typedef struct {
 142         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
 143 } compat_sigset_t;
 144
 145 struct compat_sigaction {
 146 #ifndef __ARCH_HAS_IRIX_SIGACTION
 147         compat_uptr_t                   sa_handler;
 148         compat_ulong_t                  sa_flags;
 149 #else
 150         compat_uint_t                   sa_flags;
 151         compat_uptr_t                   sa_handler;
 152 #endif
 153 #ifdef __ARCH_HAS_SA_RESTORER
 154         compat_uptr_t                   sa_restorer;
 155 #endif
 156         compat_sigset_t                 sa_mask __packed;
 157 };
 158
 159 /*
 160  * These functions operate on 32- or 64-bit specs depending on
 161  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
 162  */
 163 extern int compat_get_timespec(struct timespec *, const void __user *);
 164 extern int compat_put_timespec(const struct timespec *, void __user *);
 165 extern int compat_get_timeval(struct timeval *, const void __user *);
 166 extern int compat_put_timeval(const struct timeval *, void __user *);
 167 extern int compat_get_timespec64(struct timespec64 *, const void __user *);
 168 extern int compat_put_timespec64(const struct timespec64 *, void __user *);
 169 extern int get_compat_itimerspec64(struct itimerspec64 *its,
 170                         const struct compat_itimerspec __user *uits);
 171 extern int put_compat_itimerspec64(const struct itimerspec64 *its,
 172                         struct compat_itimerspec __user *uits);
 173
 174 struct compat_iovec {
 175         compat_uptr_t   iov_base;
 176         compat_size_t   iov_len;
 177 };
 178
 179 struct compat_rlimit {
 180         compat_ulong_t  rlim_cur;
 181         compat_ulong_t  rlim_max;
 182 };
 183
 184 struct compat_rusage {
 185         struct compat_timeval ru_utime;
 186         struct compat_timeval ru_stime;
 187         compat_long_t   ru_maxrss;
 188         compat_long_t   ru_ixrss;
 189         compat_long_t   ru_idrss;
 190         compat_long_t   ru_isrss;
 191         compat_long_t   ru_minflt;
 192         compat_long_t   ru_majflt;
 193         compat_long_t   ru_nswap;
 194         compat_long_t   ru_inblock;
 195         compat_long_t   ru_oublock;
 196         compat_long_t   ru_msgsnd;
 197         compat_long_t   ru_msgrcv;
 198         compat_long_t   ru_nsignals;
 199         compat_long_t   ru_nvcsw;
 200         compat_long_t   ru_nivcsw;
 201 };
 202
 203 extern int put_compat_rusage(const struct rusage *,
 204                              struct compat_rusage __user *);
 205
 206 struct compat_siginfo;
 207
 208 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 209                 struct compat_siginfo __user *, int,
 210                 struct compat_rusage __user *);
 211
 212 struct compat_dirent {
 213         u32             d_ino;
 214         compat_off_t    d_off;
 215         u16             d_reclen;
 216         char            d_name[256];
 217 };
 218
 219 struct compat_ustat {
 220         compat_daddr_t          f_tfree;
 221         compat_ino_t            f_tinode;
 222         char                    f_fname[6];
 223         char                    f_fpack[6];
 224 };
 225
 226 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 227
 228 typedef struct compat_sigevent {
 229         compat_sigval_t sigev_value;
 230         compat_int_t sigev_signo;
 231         compat_int_t sigev_notify;
 232         union {
 233                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 234                 compat_int_t _tid;
 235
 236                 struct {
 237                         compat_uptr_t _function;
 238                         compat_uptr_t _attribute;
 239                 } _sigev_thread;
 240         } _sigev_un;
 241 } compat_sigevent_t;
 242
 243 struct compat_ifmap {
 244         compat_ulong_t mem_start;
 245         compat_ulong_t mem_end;
 246         unsigned short base_addr;
 247         unsigned char irq;
 248         unsigned char dma;
 249         unsigned char port;
 250 };
 251
 252 struct compat_if_settings {
 253         unsigned int type;      /* Type of physical device or protocol */
 254         unsigned int size;      /* Size of the data allocated by the caller */
 255         compat_uptr_t ifs_ifsu; /* union of pointers */
 256 };
 257
 258 struct compat_ifreq {
 259         union {
 260                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 261         } ifr_ifrn;
 262         union {
 263                 struct  sockaddr ifru_addr;
 264                 struct  sockaddr ifru_dstaddr;
 265                 struct  sockaddr ifru_broadaddr;
 266                 struct  sockaddr ifru_netmask;
 267                 struct  sockaddr ifru_hwaddr;
 268                 short   ifru_flags;
 269                 compat_int_t    ifru_ivalue;
 270                 compat_int_t    ifru_mtu;
 271                 struct  compat_ifmap ifru_map;
 272                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
 273                 char    ifru_newname[IFNAMSIZ];
 274                 compat_caddr_t  ifru_data;
 275                 struct  compat_if_settings ifru_settings;
 276         } ifr_ifru;
 277 };
 278
 279 struct compat_ifconf {
 280         compat_int_t    ifc_len;                /* size of buffer */
 281         compat_caddr_t  ifcbuf;
 282 };
 283
 284 struct compat_robust_list {
 285         compat_uptr_t                   next;
 286 };
 287
 288 struct compat_robust_list_head {
 289         struct compat_robust_list       list;
 290         compat_long_t                   futex_offset;
 291         compat_uptr_t                   list_op_pending;
 292 };
 293
 294 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 295 struct compat_old_sigaction {
 296         compat_uptr_t                   sa_handler;
 297         compat_old_sigset_t             sa_mask;
 298         compat_ulong_t                  sa_flags;
 299         compat_uptr_t                   sa_restorer;
 300 };
 301 #endif
 302
 303 struct compat_keyctl_kdf_params {
 304         compat_uptr_t hashname;
 305         compat_uptr_t otherinfo;
 306         __u32 otherinfolen;
 307         __u32 __spare[8];
 308 };
 309
 310 struct compat_statfs;
 311 struct compat_statfs64;
 312 struct compat_old_linux_dirent;
 313 struct compat_linux_dirent;
 314 struct linux_dirent64;
 315 struct compat_msghdr;
 316 struct compat_mmsghdr;
 317 struct compat_sysinfo;
 318 struct compat_sysctl_args;
 319 struct compat_kexec_segment;
 320 struct compat_mq_attr;
 321 struct compat_msgbuf;
 322
 323 extern void compat_exit_robust_list(struct task_struct *curr);
 324
 325 asmlinkage long
 326 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 327                            compat_size_t len);
 328 asmlinkage long
 329 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 330                            compat_size_t __user *len_ptr);
 331
 332 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
 333 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
 334 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 335 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
 336                 compat_ssize_t msgsz, int msgflg);
 337 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
 338                 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
 339 long compat_sys_msgctl(int first, int second, void __user *uptr);
 340 long compat_sys_shmctl(int first, int second, void __user *uptr);
 341 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 342                 unsigned nsems, const struct compat_timespec __user *timeout);
 343 asmlinkage long compat_sys_keyctl(u32 option,
 344                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 345 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 346
 347 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
 348                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 349 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
 350                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 351 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
 352                 const struct compat_iovec __user *vec,
 353                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 354 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
 355                 const struct compat_iovec __user *vec,
 356                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 357 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
 358                 const struct compat_iovec __user *vec,
 359                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
 360 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
 361                 const struct compat_iovec __user *vec,
 362                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
 363
 364 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
 365 asmlinkage long compat_sys_preadv64(unsigned long fd,
 366                 const struct compat_iovec __user *vec,
 367                 unsigned long vlen, loff_t pos);
 368 #endif
 369
 370 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
 371 asmlinkage long compat_sys_pwritev64(unsigned long fd,
 372                 const struct compat_iovec __user *vec,
 373                 unsigned long vlen, loff_t pos);
 374 #endif
 375
 376 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
 377 asmlinkage long  compat_sys_readv64v2(unsigned long fd,
 378                 const struct compat_iovec __user *vec,
 379                 unsigned long vlen, loff_t pos, rwf_t flags);
 380 #endif
 381
 382 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
 383 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
 384                 const struct compat_iovec __user *vec,
 385                 unsigned long vlen, loff_t pos, rwf_t flags);
 386 #endif
 387
 388 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 389
 390 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
 391                      const compat_uptr_t __user *envp);
 392 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
 393                      const compat_uptr_t __user *argv,
 394                      const compat_uptr_t __user *envp, int flags);
 395
 396 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 397                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 398                 struct compat_timeval __user *tvp);
 399
 400 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
 401
 402 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 403                                  compat_uint_t __user *stat_addr, int options,
 404                                  struct compat_rusage __user *ru);
 405
 406 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 407
 408 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
 409
 410 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 411                        unsigned long bitmap_size);
 412 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 413                        unsigned long bitmap_size);
 414 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 415 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
 416 int get_compat_sigevent(struct sigevent *event,
 417                 const struct compat_sigevent __user *u_event);
 418 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
 419                                   struct compat_siginfo __user *uinfo);
 420 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 421 asmlinkage long compat_sys_sigaction(int sig,
 422                                    const struct compat_old_sigaction __user *act,
 423                                    struct compat_old_sigaction __user *oact);
 424 #endif
 425
 426 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 427                                         struct compat_timeval *rhs)
 428 {
 429         if (lhs->tv_sec < rhs->tv_sec)
 430                 return -1;
 431         if (lhs->tv_sec > rhs->tv_sec)
 432                 return 1;
 433         return lhs->tv_usec - rhs->tv_usec;
 434 }
 435
 436 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 437                                         struct compat_timespec *rhs)
 438 {
 439         if (lhs->tv_sec < rhs->tv_sec)
 440                 return -1;
 441         if (lhs->tv_sec > rhs->tv_sec)
 442                 return 1;
 443         return lhs->tv_nsec - rhs->tv_nsec;
 444 }
 445
 446 extern int get_compat_itimerspec(struct itimerspec *dst,
 447                                  const struct compat_itimerspec __user *src);
 448 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 449                                  const struct itimerspec *src);
 450
 451 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 452                 struct timezone __user *tz);
 453 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 454                 struct timezone __user *tz);
 455
 456 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 457
 458 extern void sigset_from_compat(sigset_t *set, const compat_sigset_t *compat);
 459 extern void sigset_to_compat(compat_sigset_t *compat, const sigset_t *set);
 460
 461 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 462                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 463                 const compat_ulong_t __user *new_nodes);
 464
 465 extern int compat_ptrace_request(struct task_struct *child,
 466                                  compat_long_t request,
 467                                  compat_ulong_t addr, compat_ulong_t data);
 468
 469 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 470                                compat_ulong_t addr, compat_ulong_t data);
 471 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 472                                   compat_long_t addr, compat_long_t data);
 473
 474 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
 475 /*
 476  * epoll (fs/eventpoll.c) compat bits follow ...
 477  */
 478 struct epoll_event;     /* fortunately, this one is fixed-layout */
 479 asmlinkage long compat_sys_epoll_pwait(int epfd,
 480                         struct epoll_event __user *events,
 481                         int maxevents, int timeout,
 482                         const compat_sigset_t __user *sigmask,
 483                         compat_size_t sigsetsize);
 484
 485 asmlinkage long compat_sys_utime(const char __user *filename,
 486                                  struct compat_utimbuf __user *t);
 487 asmlinkage long compat_sys_utimensat(unsigned int dfd,
 488                                      const char __user *filename,
 489                                      struct compat_timespec __user *t,
 490                                      int flags);
 491
 492 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
 493 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
 494 asmlinkage long compat_sys_signalfd(int ufd,
 495                                     const compat_sigset_t __user *sigmask,
 496                                     compat_size_t sigsetsize);
 497 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 498                                    const struct compat_itimerspec __user *utmr,
 499                                    struct compat_itimerspec __user *otmr);
 500 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 501                                    struct compat_itimerspec __user *otmr);
 502
 503 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
 504                                       __u32 __user *pages,
 505                                       const int __user *nodes,
 506                                       int __user *status,
 507                                       int flags);
 508 asmlinkage long compat_sys_futimesat(unsigned int dfd,
 509                                      const char __user *filename,
 510                                      struct compat_timeval __user *t);
 511 asmlinkage long compat_sys_utimes(const char __user *filename,
 512                                   struct compat_timeval __user *t);
 513 asmlinkage long compat_sys_newstat(const char __user *filename,
 514                                    struct compat_stat __user *statbuf);
 515 asmlinkage long compat_sys_newlstat(const char __user *filename,
 516                                     struct compat_stat __user *statbuf);
 517 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
 518                                       const char __user *filename,
 519                                       struct compat_stat __user *statbuf,
 520                                       int flag);
 521 asmlinkage long compat_sys_newfstat(unsigned int fd,
 522                                     struct compat_stat __user *statbuf);
 523 asmlinkage long compat_sys_statfs(const char __user *pathname,
 524                                   struct compat_statfs __user *buf);
 525 asmlinkage long compat_sys_fstatfs(unsigned int fd,
 526                                    struct compat_statfs __user *buf);
 527 asmlinkage long compat_sys_statfs64(const char __user *pathname,
 528                                     compat_size_t sz,
 529                                     struct compat_statfs64 __user *buf);
 530 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
 531                                      struct compat_statfs64 __user *buf);
 532 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
 533                                    compat_ulong_t arg);
 534 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
 535                                  compat_ulong_t arg);
 536 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
 537 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
 538                                         compat_long_t min_nr,
 539                                         compat_long_t nr,
 540                                         struct io_event __user *events,
 541                                         struct compat_timespec __user *timeout);
 542 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
 543                                      u32 __user *iocb);
 544 asmlinkage long compat_sys_mount(const char __user *dev_name,
 545                                  const char __user *dir_name,
 546                                  const char __user *type, compat_ulong_t flags,
 547                                  const void __user *data);
 548 asmlinkage long compat_sys_old_readdir(unsigned int fd,
 549                                        struct compat_old_linux_dirent __user *,
 550                                        unsigned int count);
 551 asmlinkage long compat_sys_getdents(unsigned int fd,
 552                                     struct compat_linux_dirent __user *dirent,
 553                                     unsigned int count);
 554 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
 555                                     unsigned int nr_segs, unsigned int flags);
 556 asmlinkage long compat_sys_open(const char __user *filename, int flags,
 557                                 umode_t mode);
 558 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
 559                                   int flags, umode_t mode);
 560 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
 561                                              struct file_handle __user *handle,
 562                                              int flags);
 563 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
 564 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
 565 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
 566                                     compat_ulong_t __user *outp,
 567                                     compat_ulong_t __user *exp,
 568                                     struct compat_timespec __user *tsp,
 569                                     void __user *sig);
 570 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
 571                                  unsigned int nfds,
 572                                  struct compat_timespec __user *tsp,
 573                                  const compat_sigset_t __user *sigmask,
 574                                  compat_size_t sigsetsize);
 575 asmlinkage long compat_sys_signalfd4(int ufd,
 576                                      const compat_sigset_t __user *sigmask,
 577                                      compat_size_t sigsetsize, int flags);
 578 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
 579                                          compat_ulong_t __user *nmask,
 580                                          compat_ulong_t maxnode,
 581                                          compat_ulong_t addr,
 582                                          compat_ulong_t flags);
 583 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
 584                                          compat_ulong_t maxnode);
 585 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
 586                                  compat_ulong_t mode,
 587                                  compat_ulong_t __user *nmask,
 588                                  compat_ulong_t maxnode, compat_ulong_t flags);
 589
 590 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 591                                       char __user *optval, unsigned int optlen);
 592 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
 593                                    unsigned flags);
 594 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 595                                     unsigned vlen, unsigned int flags);
 596 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
 597                                    unsigned int flags);
 598 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
 599                                 unsigned flags);
 600 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
 601                             unsigned flags, struct sockaddr __user *addr,
 602                             int __user *addrlen);
 603 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 604                                     unsigned vlen, unsigned int flags,
 605                                     struct compat_timespec __user *timeout);
 606 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
 607                                      struct compat_timespec __user *rmtp);
 608 asmlinkage long compat_sys_getitimer(int which,
 609                                      struct compat_itimerval __user *it);
 610 asmlinkage long compat_sys_setitimer(int which,
 611                                      struct compat_itimerval __user *in,
 612                                      struct compat_itimerval __user *out);
 613 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
 614 asmlinkage long compat_sys_setrlimit(unsigned int resource,
 615                                      struct compat_rlimit __user *rlim);
 616 asmlinkage long compat_sys_getrlimit(unsigned int resource,
 617                                      struct compat_rlimit __user *rlim);
 618 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
 619 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 620                                      unsigned int len,
 621                                      compat_ulong_t __user *user_mask_ptr);
 622 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
 623                                      unsigned int len,
 624                                      compat_ulong_t __user *user_mask_ptr);
 625 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
 626                         struct compat_sigevent __user *timer_event_spec,
 627                         timer_t __user *created_timer_id);
 628 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
 629                                          struct compat_itimerspec __user *new,
 630                                          struct compat_itimerspec __user *old);
 631 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
 632                                  struct compat_itimerspec __user *setting);
 633 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
 634                                          struct compat_timespec __user *tp);
 635 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
 636                                          struct compat_timespec __user *tp);
 637 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
 638                                          struct compat_timex __user *tp);
 639 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
 640                                         struct compat_timespec __user *tp);
 641 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
 642                                            struct compat_timespec __user *rqtp,
 643                                            struct compat_timespec __user *rmtp);
 644 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
 645                 struct compat_siginfo __user *uinfo,
 646                 struct compat_timespec __user *uts, compat_size_t sigsetsize);
 647 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
 648                                          compat_size_t sigsetsize);
 649 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
 650                                           compat_sigset_t __user *oset,
 651                                           compat_size_t sigsetsize);
 652 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
 653                                          compat_size_t sigsetsize);
 654 #ifndef CONFIG_ODD_RT_SIGACTION
 655 asmlinkage long compat_sys_rt_sigaction(int,
 656                                  const struct compat_sigaction __user *,
 657                                  struct compat_sigaction __user *,
 658                                  compat_size_t);
 659 #endif
 660 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
 661                                 struct compat_siginfo __user *uinfo);
 662 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 663 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
 664                                  compat_ulong_t arg);
 665 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 666                 struct compat_timespec __user *utime, u32 __user *uaddr2,
 667                 u32 val3);
 668 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 669                                       char __user *optval, int __user *optlen);
 670 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
 671                                       compat_ulong_t nr_segments,
 672                                       struct compat_kexec_segment __user *,
 673                                       compat_ulong_t flags);
 674 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
 675                         const struct compat_mq_attr __user *u_mqstat,
 676                         struct compat_mq_attr __user *u_omqstat);
 677 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 678                         const struct compat_sigevent __user *u_notification);
 679 asmlinkage long compat_sys_mq_open(const char __user *u_name,
 680                         int oflag, compat_mode_t mode,
 681                         struct compat_mq_attr __user *u_attr);
 682 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 683                         const char __user *u_msg_ptr,
 684                         compat_size_t msg_len, unsigned int msg_prio,
 685                         const struct compat_timespec __user *u_abs_timeout);
 686 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 687                         char __user *u_msg_ptr,
 688                         compat_size_t msg_len, unsigned int __user *u_msg_prio,
 689                         const struct compat_timespec __user *u_abs_timeout);
 690 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
 691 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
 692
 693 extern ssize_t compat_rw_copy_check_uvector(int type,
 694                 const struct compat_iovec __user *uvector,
 695                 unsigned long nr_segs,
 696                 unsigned long fast_segs, struct iovec *fast_pointer,
 697                 struct iovec **ret_pointer);
 698
 699 extern void __user *compat_alloc_user_space(unsigned long len);
 700
 701 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
 702                 const struct compat_iovec __user *lvec,
 703                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 704                 compat_ulong_t riovcnt, compat_ulong_t flags);
 705 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 706                 const struct compat_iovec __user *lvec,
 707                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 708                 compat_ulong_t riovcnt, compat_ulong_t flags);
 709
 710 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 711                                     compat_off_t __user *offset, compat_size_t count);
 712 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 713                                     compat_loff_t __user *offset, compat_size_t count);
 714 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
 715                                        compat_stack_t __user *uoss_ptr);
 716
 717 #ifdef __ARCH_WANT_SYS_SIGPENDING
 718 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
 719 #endif
 720
 721 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
 722 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
 723                                        compat_old_sigset_t __user *oset);
 724 #endif
 725
 726 int compat_restore_altstack(const compat_stack_t __user *uss);
 727 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 728 #define compat_save_altstack_ex(uss, sp) do { \
 729         compat_stack_t __user *__uss = uss; \
 730         struct task_struct *t = current; \
 731         put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
 732         put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
 733         put_user_ex(t->sas_ss_size, &__uss->ss_size); \
 734         if (t->sas_ss_flags & SS_AUTODISARM) \
 735                 sas_ss_reset(t); \
 736 } while (0);
 737
 738 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
 739                                                  struct compat_timespec __user *interval);
 740
 741 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
 742                                             int, const char __user *);
 743
 744 asmlinkage long compat_sys_arch_prctl(int option, unsigned long arg2);
 745
 746 /*
 747  * For most but not all architectures, "am I in a compat syscall?" and
 748  * "am I a compat task?" are the same question.  For architectures on which
 749  * they aren't the same question, arch code can override in_compat_syscall.
 750  */
 751
 752 #ifndef in_compat_syscall
 753 static inline bool in_compat_syscall(void) { return is_compat_task(); }
 754 #endif
 755
 756 /**
 757  * ns_to_compat_timeval - Compat version of ns_to_timeval
 758  * @nsec:       the nanoseconds value to be converted
 759  *
 760  * Returns the compat_timeval representation of the nsec parameter.
 761  */
 762 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
 763 {
 764         struct timeval tv;
 765         struct compat_timeval ctv;
 766
 767         tv = ns_to_timeval(nsec);
 768         ctv.tv_sec = tv.tv_sec;
 769         ctv.tv_usec = tv.tv_usec;
 770
 771         return ctv;
 772 }
 773
 774 #else /* !CONFIG_COMPAT */
 775
 776 #define is_compat_task() (0)
 777 static inline bool in_compat_syscall(void) { return false; }
 778
 779 #endif /* CONFIG_COMPAT */
 780
 781 #endif /* _LINUX_COMPAT_H */