include/linux/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_COMPAT_H
   3 #define _LINUX_COMPAT_H
   4 /*
   5  * These are the type definitions for the architecture specific
   6  * syscall compatibility layer.
   7  */
   8
   9 #include <linux/types.h>
  10
  11 #ifdef CONFIG_COMPAT
  12
  13 #include <linux/stat.h>
  14 #include <linux/param.h>        /* for HZ */
  15 #include <linux/sem.h>
  16 #include <linux/socket.h>
  17 #include <linux/if.h>
  18 #include <linux/fs.h>
  19 #include <linux/aio_abi.h>      /* for aio_context_t */
  20 #include <linux/unistd.h>
  21
  22 #include <asm/compat.h>
  23 #include <asm/siginfo.h>
  24 #include <asm/signal.h>
  25
  26 #ifndef COMPAT_USE_64BIT_TIME
  27 #define COMPAT_USE_64BIT_TIME 0
  28 #endif
  29
  30 #ifndef __SC_DELOUSE
  31 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
  32 #endif
  33
  34 #define COMPAT_SYSCALL_DEFINE0(name) \
  35         asmlinkage long compat_sys_##name(void)
  36
  37 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
  38         COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
  39 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
  40         COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
  41 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
  42         COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
  43 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
  44         COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
  45 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
  46         COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
  47 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
  48         COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
  49
  50 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
  51         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))\
  52                 __attribute__((alias(__stringify(compat_SyS##name))));  \
  53         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
  54         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__));\
  55         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
  56         {                                                               \
  57                 return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
  58         }                                                               \
  59         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
  60
  61 #ifndef compat_user_stack_pointer
  62 #define compat_user_stack_pointer() current_user_stack_pointer()
  63 #endif
  64 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
  65 typedef struct compat_sigaltstack {
  66         compat_uptr_t                   ss_sp;
  67         int                             ss_flags;
  68         compat_size_t                   ss_size;
  69 } compat_stack_t;
  70 #endif
  71 #ifndef COMPAT_MINSIGSTKSZ
  72 #define COMPAT_MINSIGSTKSZ      MINSIGSTKSZ
  73 #endif
  74
  75 #define compat_jiffies_to_clock_t(x)    \
  76                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  77
  78 typedef __compat_uid32_t        compat_uid_t;
  79 typedef __compat_gid32_t        compat_gid_t;
  80
  81 typedef compat_ulong_t          compat_aio_context_t;
  82
  83 struct compat_sel_arg_struct;
  84 struct rusage;
  85
  86 struct compat_itimerspec {
  87         struct compat_timespec it_interval;
  88         struct compat_timespec it_value;
  89 };
  90
  91 struct compat_utimbuf {
  92         compat_time_t           actime;
  93         compat_time_t           modtime;
  94 };
  95
  96 struct compat_itimerval {
  97         struct compat_timeval   it_interval;
  98         struct compat_timeval   it_value;
  99 };
 100
 101 struct itimerval;
 102 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
 103 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
 104
 105 struct compat_tms {
 106         compat_clock_t          tms_utime;
 107         compat_clock_t          tms_stime;
 108         compat_clock_t          tms_cutime;
 109         compat_clock_t          tms_cstime;
 110 };
 111
 112 struct compat_timex {
 113         compat_uint_t modes;
 114         compat_long_t offset;
 115         compat_long_t freq;
 116         compat_long_t maxerror;
 117         compat_long_t esterror;
 118         compat_int_t status;
 119         compat_long_t constant;
 120         compat_long_t precision;
 121         compat_long_t tolerance;
 122         struct compat_timeval time;
 123         compat_long_t tick;
 124         compat_long_t ppsfreq;
 125         compat_long_t jitter;
 126         compat_int_t shift;
 127         compat_long_t stabil;
 128         compat_long_t jitcnt;
 129         compat_long_t calcnt;
 130         compat_long_t errcnt;
 131         compat_long_t stbcnt;
 132         compat_int_t tai;
 133
 134         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 135         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 136         compat_int_t:32; compat_int_t:32; compat_int_t:32;
 137 };
 138
 139 struct timex;
 140 int compat_get_timex(struct timex *, const struct compat_timex __user *);
 141 int compat_put_timex(struct compat_timex __user *, const struct timex *);
 142
 143 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
 144
 145 typedef struct {
 146         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
 147 } compat_sigset_t;
 148
 149 struct compat_sigaction {
 150 #ifndef __ARCH_HAS_IRIX_SIGACTION
 151         compat_uptr_t                   sa_handler;
 152         compat_ulong_t                  sa_flags;
 153 #else
 154         compat_uint_t                   sa_flags;
 155         compat_uptr_t                   sa_handler;
 156 #endif
 157 #ifdef __ARCH_HAS_SA_RESTORER
 158         compat_uptr_t                   sa_restorer;
 159 #endif
 160         compat_sigset_t                 sa_mask __packed;
 161 };
 162
 163 /*
 164  * These functions operate on 32- or 64-bit specs depending on
 165  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
 166  */
 167 extern int compat_get_timespec(struct timespec *, const void __user *);
 168 extern int compat_put_timespec(const struct timespec *, void __user *);
 169 extern int compat_get_timeval(struct timeval *, const void __user *);
 170 extern int compat_put_timeval(const struct timeval *, void __user *);
 171 extern int compat_get_timespec64(struct timespec64 *, const void __user *);
 172 extern int compat_put_timespec64(const struct timespec64 *, void __user *);
 173 extern int get_compat_itimerspec64(struct itimerspec64 *its,
 174                         const struct compat_itimerspec __user *uits);
 175 extern int put_compat_itimerspec64(const struct itimerspec64 *its,
 176                         struct compat_itimerspec __user *uits);
 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_keyctl_kdf_params {
 308         compat_uptr_t hashname;
 309         compat_uptr_t otherinfo;
 310         __u32 otherinfolen;
 311         __u32 __spare[8];
 312 };
 313
 314 struct compat_statfs;
 315 struct compat_statfs64;
 316 struct compat_old_linux_dirent;
 317 struct compat_linux_dirent;
 318 struct linux_dirent64;
 319 struct compat_msghdr;
 320 struct compat_mmsghdr;
 321 struct compat_sysinfo;
 322 struct compat_sysctl_args;
 323 struct compat_kexec_segment;
 324 struct compat_mq_attr;
 325 struct compat_msgbuf;
 326
 327 asmlinkage long
 328 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 329                            compat_size_t len);
 330 asmlinkage long
 331 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 332                            compat_size_t __user *len_ptr);
 333
 334 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
 335 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
 336 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 337 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
 338                 compat_ssize_t msgsz, int msgflg);
 339 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
 340                 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
 341 long compat_sys_msgctl(int first, int second, void __user *uptr);
 342 long compat_sys_shmctl(int first, int second, void __user *uptr);
 343 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 344                 unsigned nsems, const struct compat_timespec __user *timeout);
 345 asmlinkage long compat_sys_keyctl(u32 option,
 346                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 347 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 348
 349 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
 350                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 351 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
 352                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 353 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
 354                 const struct compat_iovec __user *vec,
 355                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 356 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
 357                 const struct compat_iovec __user *vec,
 358                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 359 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
 360                 const struct compat_iovec __user *vec,
 361                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
 362 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
 363                 const struct compat_iovec __user *vec,
 364                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
 365
 366 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
 367 asmlinkage long compat_sys_preadv64(unsigned long fd,
 368                 const struct compat_iovec __user *vec,
 369                 unsigned long vlen, loff_t pos);
 370 #endif
 371
 372 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
 373 asmlinkage long compat_sys_pwritev64(unsigned long fd,
 374                 const struct compat_iovec __user *vec,
 375                 unsigned long vlen, loff_t pos);
 376 #endif
 377
 378 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
 379 asmlinkage long  compat_sys_readv64v2(unsigned long fd,
 380                 const struct compat_iovec __user *vec,
 381                 unsigned long vlen, loff_t pos, rwf_t flags);
 382 #endif
 383
 384 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
 385 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
 386                 const struct compat_iovec __user *vec,
 387                 unsigned long vlen, loff_t pos, rwf_t flags);
 388 #endif
 389
 390 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 391
 392 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
 393                      const compat_uptr_t __user *envp);
 394 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
 395                      const compat_uptr_t __user *argv,
 396                      const compat_uptr_t __user *envp, int flags);
 397
 398 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 399                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 400                 struct compat_timeval __user *tvp);
 401
 402 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
 403
 404 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 405                                  compat_uint_t __user *stat_addr, int options,
 406                                  struct compat_rusage __user *ru);
 407
 408 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 409
 410 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
 411
 412 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 413                        unsigned long bitmap_size);
 414 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 415                        unsigned long bitmap_size);
 416 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 417 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
 418 int get_compat_sigevent(struct sigevent *event,
 419                 const struct compat_sigevent __user *u_event);
 420 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
 421                                   struct compat_siginfo __user *uinfo);
 422 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 423 asmlinkage long compat_sys_sigaction(int sig,
 424                                    const struct compat_old_sigaction __user *act,
 425                                    struct compat_old_sigaction __user *oact);
 426 #endif
 427
 428 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 429                                         struct compat_timeval *rhs)
 430 {
 431         if (lhs->tv_sec < rhs->tv_sec)
 432                 return -1;
 433         if (lhs->tv_sec > rhs->tv_sec)
 434                 return 1;
 435         return lhs->tv_usec - rhs->tv_usec;
 436 }
 437
 438 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 439                                         struct compat_timespec *rhs)
 440 {
 441         if (lhs->tv_sec < rhs->tv_sec)
 442                 return -1;
 443         if (lhs->tv_sec > rhs->tv_sec)
 444                 return 1;
 445         return lhs->tv_nsec - rhs->tv_nsec;
 446 }
 447
 448 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 449                 struct timezone __user *tz);
 450 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 451                 struct timezone __user *tz);
 452
 453 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 454
 455 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
 456 extern int put_compat_sigset(compat_sigset_t __user *compat,
 457                              const sigset_t *set, unsigned int size);
 458
 459 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 460                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 461                 const compat_ulong_t __user *new_nodes);
 462
 463 extern int compat_ptrace_request(struct task_struct *child,
 464                                  compat_long_t request,
 465                                  compat_ulong_t addr, compat_ulong_t data);
 466
 467 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 468                                compat_ulong_t addr, compat_ulong_t data);
 469 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 470                                   compat_long_t addr, compat_long_t data);
 471
 472 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
 473 /*
 474  * epoll (fs/eventpoll.c) compat bits follow ...
 475  */
 476 struct epoll_event;     /* fortunately, this one is fixed-layout */
 477 asmlinkage long compat_sys_epoll_pwait(int epfd,
 478                         struct epoll_event __user *events,
 479                         int maxevents, int timeout,
 480                         const compat_sigset_t __user *sigmask,
 481                         compat_size_t sigsetsize);
 482
 483 asmlinkage long compat_sys_utime(const char __user *filename,
 484                                  struct compat_utimbuf __user *t);
 485 asmlinkage long compat_sys_utimensat(unsigned int dfd,
 486                                      const char __user *filename,
 487                                      struct compat_timespec __user *t,
 488                                      int flags);
 489
 490 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
 491 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
 492 asmlinkage long compat_sys_signalfd(int ufd,
 493                                     const compat_sigset_t __user *sigmask,
 494                                     compat_size_t sigsetsize);
 495 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 496                                    const struct compat_itimerspec __user *utmr,
 497                                    struct compat_itimerspec __user *otmr);
 498 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 499                                    struct compat_itimerspec __user *otmr);
 500
 501 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
 502                                       __u32 __user *pages,
 503                                       const int __user *nodes,
 504                                       int __user *status,
 505                                       int flags);
 506 asmlinkage long compat_sys_futimesat(unsigned int dfd,
 507                                      const char __user *filename,
 508                                      struct compat_timeval __user *t);
 509 asmlinkage long compat_sys_utimes(const char __user *filename,
 510                                   struct compat_timeval __user *t);
 511 asmlinkage long compat_sys_newstat(const char __user *filename,
 512                                    struct compat_stat __user *statbuf);
 513 asmlinkage long compat_sys_newlstat(const char __user *filename,
 514                                     struct compat_stat __user *statbuf);
 515 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
 516                                       const char __user *filename,
 517                                       struct compat_stat __user *statbuf,
 518                                       int flag);
 519 asmlinkage long compat_sys_newfstat(unsigned int fd,
 520                                     struct compat_stat __user *statbuf);
 521 asmlinkage long compat_sys_statfs(const char __user *pathname,
 522                                   struct compat_statfs __user *buf);
 523 asmlinkage long compat_sys_fstatfs(unsigned int fd,
 524                                    struct compat_statfs __user *buf);
 525 asmlinkage long compat_sys_statfs64(const char __user *pathname,
 526                                     compat_size_t sz,
 527                                     struct compat_statfs64 __user *buf);
 528 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
 529                                      struct compat_statfs64 __user *buf);
 530 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
 531                                    compat_ulong_t arg);
 532 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
 533                                  compat_ulong_t arg);
 534 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
 535 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
 536                                         compat_long_t min_nr,
 537                                         compat_long_t nr,
 538                                         struct io_event __user *events,
 539                                         struct compat_timespec __user *timeout);
 540 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
 541                                      u32 __user *iocb);
 542 asmlinkage long compat_sys_mount(const char __user *dev_name,
 543                                  const char __user *dir_name,
 544                                  const char __user *type, compat_ulong_t flags,
 545                                  const void __user *data);
 546 asmlinkage long compat_sys_old_readdir(unsigned int fd,
 547                                        struct compat_old_linux_dirent __user *,
 548                                        unsigned int count);
 549 asmlinkage long compat_sys_getdents(unsigned int fd,
 550                                     struct compat_linux_dirent __user *dirent,
 551                                     unsigned int count);
 552 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
 553                                     unsigned int nr_segs, unsigned int flags);
 554 asmlinkage long compat_sys_open(const char __user *filename, int flags,
 555                                 umode_t mode);
 556 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
 557                                   int flags, umode_t mode);
 558 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
 559                                              struct file_handle __user *handle,
 560                                              int flags);
 561 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
 562 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
 563 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
 564                                     compat_ulong_t __user *outp,
 565                                     compat_ulong_t __user *exp,
 566                                     struct compat_timespec __user *tsp,
 567                                     void __user *sig);
 568 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
 569                                  unsigned int nfds,
 570                                  struct compat_timespec __user *tsp,
 571                                  const compat_sigset_t __user *sigmask,
 572                                  compat_size_t sigsetsize);
 573 asmlinkage long compat_sys_signalfd4(int ufd,
 574                                      const compat_sigset_t __user *sigmask,
 575                                      compat_size_t sigsetsize, int flags);
 576 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
 577                                          compat_ulong_t __user *nmask,
 578                                          compat_ulong_t maxnode,
 579                                          compat_ulong_t addr,
 580                                          compat_ulong_t flags);
 581 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
 582                                          compat_ulong_t maxnode);
 583 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
 584                                  compat_ulong_t mode,
 585                                  compat_ulong_t __user *nmask,
 586                                  compat_ulong_t maxnode, compat_ulong_t flags);
 587
 588 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 589                                       char __user *optval, unsigned int optlen);
 590 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
 591                                    unsigned flags);
 592 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 593                                     unsigned vlen, unsigned int flags);
 594 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
 595                                    unsigned int flags);
 596 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
 597                                 unsigned flags);
 598 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
 599                             unsigned flags, struct sockaddr __user *addr,
 600                             int __user *addrlen);
 601 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 602                                     unsigned vlen, unsigned int flags,
 603                                     struct compat_timespec __user *timeout);
 604 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
 605                                      struct compat_timespec __user *rmtp);
 606 asmlinkage long compat_sys_getitimer(int which,
 607                                      struct compat_itimerval __user *it);
 608 asmlinkage long compat_sys_setitimer(int which,
 609                                      struct compat_itimerval __user *in,
 610                                      struct compat_itimerval __user *out);
 611 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
 612 asmlinkage long compat_sys_setrlimit(unsigned int resource,
 613                                      struct compat_rlimit __user *rlim);
 614 asmlinkage long compat_sys_getrlimit(unsigned int resource,
 615                                      struct compat_rlimit __user *rlim);
 616 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
 617 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 618                                      unsigned int len,
 619                                      compat_ulong_t __user *user_mask_ptr);
 620 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
 621                                      unsigned int len,
 622                                      compat_ulong_t __user *user_mask_ptr);
 623 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
 624                         struct compat_sigevent __user *timer_event_spec,
 625                         timer_t __user *created_timer_id);
 626 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
 627                                          struct compat_itimerspec __user *new,
 628                                          struct compat_itimerspec __user *old);
 629 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
 630                                  struct compat_itimerspec __user *setting);
 631 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
 632                                          struct compat_timespec __user *tp);
 633 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
 634                                          struct compat_timespec __user *tp);
 635 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
 636                                          struct compat_timex __user *tp);
 637 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
 638                                         struct compat_timespec __user *tp);
 639 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
 640                                            struct compat_timespec __user *rqtp,
 641                                            struct compat_timespec __user *rmtp);
 642 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
 643                 struct compat_siginfo __user *uinfo,
 644                 struct compat_timespec __user *uts, compat_size_t sigsetsize);
 645 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
 646                                          compat_size_t sigsetsize);
 647 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
 648                                           compat_sigset_t __user *oset,
 649                                           compat_size_t sigsetsize);
 650 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
 651                                          compat_size_t sigsetsize);
 652 #ifndef CONFIG_ODD_RT_SIGACTION
 653 asmlinkage long compat_sys_rt_sigaction(int,
 654                                  const struct compat_sigaction __user *,
 655                                  struct compat_sigaction __user *,
 656                                  compat_size_t);
 657 #endif
 658 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
 659                                 struct compat_siginfo __user *uinfo);
 660 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 661 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
 662                                  compat_ulong_t arg);
 663 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 664                 struct compat_timespec __user *utime, u32 __user *uaddr2,
 665                 u32 val3);
 666 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 667                                       char __user *optval, int __user *optlen);
 668 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
 669                                       compat_ulong_t nr_segments,
 670                                       struct compat_kexec_segment __user *,
 671                                       compat_ulong_t flags);
 672 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
 673                         const struct compat_mq_attr __user *u_mqstat,
 674                         struct compat_mq_attr __user *u_omqstat);
 675 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 676                         const struct compat_sigevent __user *u_notification);
 677 asmlinkage long compat_sys_mq_open(const char __user *u_name,
 678                         int oflag, compat_mode_t mode,
 679                         struct compat_mq_attr __user *u_attr);
 680 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 681                         const char __user *u_msg_ptr,
 682                         compat_size_t msg_len, unsigned int msg_prio,
 683                         const struct compat_timespec __user *u_abs_timeout);
 684 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 685                         char __user *u_msg_ptr,
 686                         compat_size_t msg_len, unsigned int __user *u_msg_prio,
 687                         const struct compat_timespec __user *u_abs_timeout);
 688 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
 689 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
 690
 691 extern ssize_t compat_rw_copy_check_uvector(int type,
 692                 const struct compat_iovec __user *uvector,
 693                 unsigned long nr_segs,
 694                 unsigned long fast_segs, struct iovec *fast_pointer,
 695                 struct iovec **ret_pointer);
 696
 697 extern void __user *compat_alloc_user_space(unsigned long len);
 698
 699 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
 700                 const struct compat_iovec __user *lvec,
 701                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 702                 compat_ulong_t riovcnt, compat_ulong_t flags);
 703 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 704                 const struct compat_iovec __user *lvec,
 705                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 706                 compat_ulong_t riovcnt, compat_ulong_t flags);
 707
 708 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 709                                     compat_off_t __user *offset, compat_size_t count);
 710 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 711                                     compat_loff_t __user *offset, compat_size_t count);
 712 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
 713                                        compat_stack_t __user *uoss_ptr);
 714
 715 #ifdef __ARCH_WANT_SYS_SIGPENDING
 716 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
 717 #endif
 718
 719 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
 720 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
 721                                        compat_old_sigset_t __user *oset);
 722 #endif
 723
 724 int compat_restore_altstack(const compat_stack_t __user *uss);
 725 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 726 #define compat_save_altstack_ex(uss, sp) do { \
 727         compat_stack_t __user *__uss = uss; \
 728         struct task_struct *t = current; \
 729         put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
 730         put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
 731         put_user_ex(t->sas_ss_size, &__uss->ss_size); \
 732         if (t->sas_ss_flags & SS_AUTODISARM) \
 733                 sas_ss_reset(t); \
 734 } while (0);
 735
 736 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
 737                                                  struct compat_timespec __user *interval);
 738
 739 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
 740                                             int, const char __user *);
 741
 742 asmlinkage long compat_sys_arch_prctl(int option, unsigned long arg2);
 743
 744 /*
 745  * For most but not all architectures, "am I in a compat syscall?" and
 746  * "am I a compat task?" are the same question.  For architectures on which
 747  * they aren't the same question, arch code can override in_compat_syscall.
 748  */
 749
 750 #ifndef in_compat_syscall
 751 static inline bool in_compat_syscall(void) { return is_compat_task(); }
 752 #endif
 753
 754 /**
 755  * ns_to_compat_timeval - Compat version of ns_to_timeval
 756  * @nsec:       the nanoseconds value to be converted
 757  *
 758  * Returns the compat_timeval representation of the nsec parameter.
 759  */
 760 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
 761 {
 762         struct timeval tv;
 763         struct compat_timeval ctv;
 764
 765         tv = ns_to_timeval(nsec);
 766         ctv.tv_sec = tv.tv_sec;
 767         ctv.tv_usec = tv.tv_usec;
 768
 769         return ctv;
 770 }
 771
 772 #else /* !CONFIG_COMPAT */
 773
 774 #define is_compat_task() (0)
 775 static inline bool in_compat_syscall(void) { return false; }
 776
 777 #endif /* CONFIG_COMPAT */
 778
 779 #endif /* _LINUX_COMPAT_H */