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TOMOYO Linux Cross Reference
Linux/include/linux/compat.h

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Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 #include <linux/time.h>
 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/uaccess.h>
 20 #include <linux/unistd.h>
 21 
 22 #include <asm/compat.h>
 23 
 24 #ifdef CONFIG_COMPAT
 25 #include <asm/siginfo.h>
 26 #include <asm/signal.h>
 27 #endif
 28 
 29 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
 30 /*
 31  * It may be useful for an architecture to override the definitions of the
 32  * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
 33  * to use a different calling convention for syscalls. To allow for that,
 34  + the prototypes for the compat_sys_*() functions below will *not* be included
 35  * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
 36  */
 37 #include <asm/syscall_wrapper.h>
 38 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
 39 
 40 #ifndef COMPAT_USE_64BIT_TIME
 41 #define COMPAT_USE_64BIT_TIME 0
 42 #endif
 43 
 44 #ifndef __SC_DELOUSE
 45 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
 46 #endif
 47 
 48 #ifndef COMPAT_SYSCALL_DEFINE0
 49 #define COMPAT_SYSCALL_DEFINE0(name) \
 50         asmlinkage long compat_sys_##name(void); \
 51         ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
 52         asmlinkage long compat_sys_##name(void)
 53 #endif /* COMPAT_SYSCALL_DEFINE0 */
 54 
 55 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
 56         COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
 57 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
 58         COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
 59 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
 60         COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
 61 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
 62         COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
 63 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
 64         COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
 65 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
 66         COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
 67 
 68 /*
 69  * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
 70  * sign-extends 32-bit ints to longs whenever needed. The actual work is
 71  * done within __do_compat_sys_*().
 72  */
 73 #ifndef COMPAT_SYSCALL_DEFINEx
 74 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                                    \
 75         __diag_push();                                                          \
 76         __diag_ignore(GCC, 8, "-Wattribute-alias",                              \
 77                       "Type aliasing is used to sanitize syscall arguments");\
 78         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));       \
 79         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))        \
 80                 __attribute__((alias(__stringify(__se_compat_sys##name))));     \
 81         ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO);                         \
 82         static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
 83         asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));  \
 84         asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))   \
 85         {                                                                       \
 86                 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
 87                 __MAP(x,__SC_TEST,__VA_ARGS__);                                 \
 88                 return ret;                                                     \
 89         }                                                                       \
 90         __diag_pop();                                                           \
 91         static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
 92 #endif /* COMPAT_SYSCALL_DEFINEx */
 93 
 94 #ifdef CONFIG_COMPAT
 95 
 96 #ifndef compat_user_stack_pointer
 97 #define compat_user_stack_pointer() current_user_stack_pointer()
 98 #endif
 99 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
100 typedef struct compat_sigaltstack {
101         compat_uptr_t                   ss_sp;
102         int                             ss_flags;
103         compat_size_t                   ss_size;
104 } compat_stack_t;
105 #endif
106 #ifndef COMPAT_MINSIGSTKSZ
107 #define COMPAT_MINSIGSTKSZ      MINSIGSTKSZ
108 #endif
109 
110 #define compat_jiffies_to_clock_t(x)    \
111                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
112 
113 typedef __compat_uid32_t        compat_uid_t;
114 typedef __compat_gid32_t        compat_gid_t;
115 
116 struct compat_sel_arg_struct;
117 struct rusage;
118 
119 struct compat_itimerval {
120         struct old_timeval32    it_interval;
121         struct old_timeval32    it_value;
122 };
123 
124 struct itimerval;
125 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
126 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
127 
128 struct compat_tms {
129         compat_clock_t          tms_utime;
130         compat_clock_t          tms_stime;
131         compat_clock_t          tms_cutime;
132         compat_clock_t          tms_cstime;
133 };
134 
135 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
136 
137 typedef struct {
138         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
139 } compat_sigset_t;
140 
141 int set_compat_user_sigmask(const compat_sigset_t __user *umask,
142                             size_t sigsetsize);
143 
144 struct compat_sigaction {
145 #ifndef __ARCH_HAS_IRIX_SIGACTION
146         compat_uptr_t                   sa_handler;
147         compat_ulong_t                  sa_flags;
148 #else
149         compat_uint_t                   sa_flags;
150         compat_uptr_t                   sa_handler;
151 #endif
152 #ifdef __ARCH_HAS_SA_RESTORER
153         compat_uptr_t                   sa_restorer;
154 #endif
155         compat_sigset_t                 sa_mask __packed;
156 };
157 
158 typedef union compat_sigval {
159         compat_int_t    sival_int;
160         compat_uptr_t   sival_ptr;
161 } compat_sigval_t;
162 
163 typedef struct compat_siginfo {
164         int si_signo;
165 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
166         int si_errno;
167         int si_code;
168 #else
169         int si_code;
170         int si_errno;
171 #endif
172 
173         union {
174                 int _pad[128/sizeof(int) - 3];
175 
176                 /* kill() */
177                 struct {
178                         compat_pid_t _pid;      /* sender's pid */
179                         __compat_uid32_t _uid;  /* sender's uid */
180                 } _kill;
181 
182                 /* POSIX.1b timers */
183                 struct {
184                         compat_timer_t _tid;    /* timer id */
185                         int _overrun;           /* overrun count */
186                         compat_sigval_t _sigval;        /* same as below */
187                 } _timer;
188 
189                 /* POSIX.1b signals */
190                 struct {
191                         compat_pid_t _pid;      /* sender's pid */
192                         __compat_uid32_t _uid;  /* sender's uid */
193                         compat_sigval_t _sigval;
194                 } _rt;
195 
196                 /* SIGCHLD */
197                 struct {
198                         compat_pid_t _pid;      /* which child */
199                         __compat_uid32_t _uid;  /* sender's uid */
200                         int _status;            /* exit code */
201                         compat_clock_t _utime;
202                         compat_clock_t _stime;
203                 } _sigchld;
204 
205 #ifdef CONFIG_X86_X32_ABI
206                 /* SIGCHLD (x32 version) */
207                 struct {
208                         compat_pid_t _pid;      /* which child */
209                         __compat_uid32_t _uid;  /* sender's uid */
210                         int _status;            /* exit code */
211                         compat_s64 _utime;
212                         compat_s64 _stime;
213                 } _sigchld_x32;
214 #endif
215 
216                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
217                 struct {
218                         compat_uptr_t _addr;    /* faulting insn/memory ref. */
219 #ifdef __ARCH_SI_TRAPNO
220                         int _trapno;    /* TRAP # which caused the signal */
221 #endif
222 #define __COMPAT_ADDR_BND_PKEY_PAD  (__alignof__(compat_uptr_t) < sizeof(short) ? \
223                                      sizeof(short) : __alignof__(compat_uptr_t))
224                         union {
225                                 /*
226                                  * used when si_code=BUS_MCEERR_AR or
227                                  * used when si_code=BUS_MCEERR_AO
228                                  */
229                                 short int _addr_lsb;    /* Valid LSB of the reported address. */
230                                 /* used when si_code=SEGV_BNDERR */
231                                 struct {
232                                         char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
233                                         compat_uptr_t _lower;
234                                         compat_uptr_t _upper;
235                                 } _addr_bnd;
236                                 /* used when si_code=SEGV_PKUERR */
237                                 struct {
238                                         char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
239                                         u32 _pkey;
240                                 } _addr_pkey;
241                         };
242                 } _sigfault;
243 
244                 /* SIGPOLL */
245                 struct {
246                         compat_long_t _band;    /* POLL_IN, POLL_OUT, POLL_MSG */
247                         int _fd;
248                 } _sigpoll;
249 
250                 struct {
251                         compat_uptr_t _call_addr; /* calling user insn */
252                         int _syscall;   /* triggering system call number */
253                         unsigned int _arch;     /* AUDIT_ARCH_* of syscall */
254                 } _sigsys;
255         } _sifields;
256 } compat_siginfo_t;
257 
258 /*
259  * These functions operate on 32- or 64-bit specs depending on
260  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
261  */
262 extern int compat_get_timespec(struct timespec *, const void __user *);
263 extern int compat_put_timespec(const struct timespec *, void __user *);
264 extern int compat_get_timeval(struct timeval *, const void __user *);
265 extern int compat_put_timeval(const struct timeval *, void __user *);
266 
267 struct compat_iovec {
268         compat_uptr_t   iov_base;
269         compat_size_t   iov_len;
270 };
271 
272 struct compat_rlimit {
273         compat_ulong_t  rlim_cur;
274         compat_ulong_t  rlim_max;
275 };
276 
277 struct compat_rusage {
278         struct old_timeval32 ru_utime;
279         struct old_timeval32 ru_stime;
280         compat_long_t   ru_maxrss;
281         compat_long_t   ru_ixrss;
282         compat_long_t   ru_idrss;
283         compat_long_t   ru_isrss;
284         compat_long_t   ru_minflt;
285         compat_long_t   ru_majflt;
286         compat_long_t   ru_nswap;
287         compat_long_t   ru_inblock;
288         compat_long_t   ru_oublock;
289         compat_long_t   ru_msgsnd;
290         compat_long_t   ru_msgrcv;
291         compat_long_t   ru_nsignals;
292         compat_long_t   ru_nvcsw;
293         compat_long_t   ru_nivcsw;
294 };
295 
296 extern int put_compat_rusage(const struct rusage *,
297                              struct compat_rusage __user *);
298 
299 struct compat_siginfo;
300 struct __compat_aio_sigset;
301 
302 struct compat_dirent {
303         u32             d_ino;
304         compat_off_t    d_off;
305         u16             d_reclen;
306         char            d_name[256];
307 };
308 
309 struct compat_ustat {
310         compat_daddr_t          f_tfree;
311         compat_ino_t            f_tinode;
312         char                    f_fname[6];
313         char                    f_fpack[6];
314 };
315 
316 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
317 
318 typedef struct compat_sigevent {
319         compat_sigval_t sigev_value;
320         compat_int_t sigev_signo;
321         compat_int_t sigev_notify;
322         union {
323                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
324                 compat_int_t _tid;
325 
326                 struct {
327                         compat_uptr_t _function;
328                         compat_uptr_t _attribute;
329                 } _sigev_thread;
330         } _sigev_un;
331 } compat_sigevent_t;
332 
333 struct compat_ifmap {
334         compat_ulong_t mem_start;
335         compat_ulong_t mem_end;
336         unsigned short base_addr;
337         unsigned char irq;
338         unsigned char dma;
339         unsigned char port;
340 };
341 
342 struct compat_if_settings {
343         unsigned int type;      /* Type of physical device or protocol */
344         unsigned int size;      /* Size of the data allocated by the caller */
345         compat_uptr_t ifs_ifsu; /* union of pointers */
346 };
347 
348 struct compat_ifreq {
349         union {
350                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
351         } ifr_ifrn;
352         union {
353                 struct  sockaddr ifru_addr;
354                 struct  sockaddr ifru_dstaddr;
355                 struct  sockaddr ifru_broadaddr;
356                 struct  sockaddr ifru_netmask;
357                 struct  sockaddr ifru_hwaddr;
358                 short   ifru_flags;
359                 compat_int_t    ifru_ivalue;
360                 compat_int_t    ifru_mtu;
361                 struct  compat_ifmap ifru_map;
362                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
363                 char    ifru_newname[IFNAMSIZ];
364                 compat_caddr_t  ifru_data;
365                 struct  compat_if_settings ifru_settings;
366         } ifr_ifru;
367 };
368 
369 struct compat_ifconf {
370         compat_int_t    ifc_len;                /* size of buffer */
371         compat_caddr_t  ifcbuf;
372 };
373 
374 struct compat_robust_list {
375         compat_uptr_t                   next;
376 };
377 
378 struct compat_robust_list_head {
379         struct compat_robust_list       list;
380         compat_long_t                   futex_offset;
381         compat_uptr_t                   list_op_pending;
382 };
383 
384 #ifdef CONFIG_COMPAT_OLD_SIGACTION
385 struct compat_old_sigaction {
386         compat_uptr_t                   sa_handler;
387         compat_old_sigset_t             sa_mask;
388         compat_ulong_t                  sa_flags;
389         compat_uptr_t                   sa_restorer;
390 };
391 #endif
392 
393 struct compat_keyctl_kdf_params {
394         compat_uptr_t hashname;
395         compat_uptr_t otherinfo;
396         __u32 otherinfolen;
397         __u32 __spare[8];
398 };
399 
400 struct compat_statfs;
401 struct compat_statfs64;
402 struct compat_old_linux_dirent;
403 struct compat_linux_dirent;
404 struct linux_dirent64;
405 struct compat_msghdr;
406 struct compat_mmsghdr;
407 struct compat_sysinfo;
408 struct compat_sysctl_args;
409 struct compat_kexec_segment;
410 struct compat_mq_attr;
411 struct compat_msgbuf;
412 
413 extern void compat_exit_robust_list(struct task_struct *curr);
414 
415 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
416 
417 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
418 
419 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
420                        unsigned long bitmap_size);
421 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
422                        unsigned long bitmap_size);
423 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
424 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
425 int get_compat_sigevent(struct sigevent *event,
426                 const struct compat_sigevent __user *u_event);
427 
428 static inline int old_timeval32_compare(struct old_timeval32 *lhs,
429                                         struct old_timeval32 *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 old_timespec32_compare(struct old_timespec32 *lhs,
439                                         struct old_timespec32 *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 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
449 
450 /*
451  * Defined inline such that size can be compile time constant, which avoids
452  * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
453  */
454 static inline int
455 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
456                   unsigned int size)
457 {
458         /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
459 #ifdef __BIG_ENDIAN
460         compat_sigset_t v;
461         switch (_NSIG_WORDS) {
462         case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
463                 /* fall through */
464         case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
465                 /* fall through */
466         case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
467                 /* fall through */
468         case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
469         }
470         return copy_to_user(compat, &v, size) ? -EFAULT : 0;
471 #else
472         return copy_to_user(compat, set, size) ? -EFAULT : 0;
473 #endif
474 }
475 
476 extern int compat_ptrace_request(struct task_struct *child,
477                                  compat_long_t request,
478                                  compat_ulong_t addr, compat_ulong_t data);
479 
480 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
481                                compat_ulong_t addr, compat_ulong_t data);
482 
483 struct epoll_event;     /* fortunately, this one is fixed-layout */
484 
485 extern ssize_t compat_rw_copy_check_uvector(int type,
486                 const struct compat_iovec __user *uvector,
487                 unsigned long nr_segs,
488                 unsigned long fast_segs, struct iovec *fast_pointer,
489                 struct iovec **ret_pointer);
490 
491 extern void __user *compat_alloc_user_space(unsigned long len);
492 
493 int compat_restore_altstack(const compat_stack_t __user *uss);
494 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
495 #define compat_save_altstack_ex(uss, sp) do { \
496         compat_stack_t __user *__uss = uss; \
497         struct task_struct *t = current; \
498         put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
499         put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
500         put_user_ex(t->sas_ss_size, &__uss->ss_size); \
501         if (t->sas_ss_flags & SS_AUTODISARM) \
502                 sas_ss_reset(t); \
503 } while (0);
504 
505 /*
506  * These syscall function prototypes are kept in the same order as
507  * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
508  * go below.
509  *
510  * Please note that these prototypes here are only provided for information
511  * purposes, for static analysis, and for linking from the syscall table.
512  * These functions should not be called elsewhere from kernel code.
513  *
514  * As the syscall calling convention may be different from the default
515  * for architectures overriding the syscall calling convention, do not
516  * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
517  */
518 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
519 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
520 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
521                                      u32 __user *iocb);
522 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
523                                         compat_long_t min_nr,
524                                         compat_long_t nr,
525                                         struct io_event __user *events,
526                                         struct old_timespec32 __user *timeout,
527                                         const struct __compat_aio_sigset __user *usig);
528 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
529                                         compat_long_t min_nr,
530                                         compat_long_t nr,
531                                         struct io_event __user *events,
532                                         struct __kernel_timespec __user *timeout,
533                                         const struct __compat_aio_sigset __user *usig);
534 
535 /* fs/cookies.c */
536 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
537 
538 /* fs/eventpoll.c */
539 asmlinkage long compat_sys_epoll_pwait(int epfd,
540                         struct epoll_event __user *events,
541                         int maxevents, int timeout,
542                         const compat_sigset_t __user *sigmask,
543                         compat_size_t sigsetsize);
544 
545 /* fs/fcntl.c */
546 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
547                                  compat_ulong_t arg);
548 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
549                                    compat_ulong_t arg);
550 
551 /* fs/ioctl.c */
552 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
553                                  compat_ulong_t arg);
554 
555 /* fs/namespace.c */
556 asmlinkage long compat_sys_mount(const char __user *dev_name,
557                                  const char __user *dir_name,
558                                  const char __user *type, compat_ulong_t flags,
559                                  const void __user *data);
560 
561 /* fs/open.c */
562 asmlinkage long compat_sys_statfs(const char __user *pathname,
563                                   struct compat_statfs __user *buf);
564 asmlinkage long compat_sys_statfs64(const char __user *pathname,
565                                     compat_size_t sz,
566                                     struct compat_statfs64 __user *buf);
567 asmlinkage long compat_sys_fstatfs(unsigned int fd,
568                                    struct compat_statfs __user *buf);
569 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
570                                      struct compat_statfs64 __user *buf);
571 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
572 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
573 /* No generic prototype for truncate64, ftruncate64, fallocate */
574 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
575                                   int flags, umode_t mode);
576 
577 /* fs/readdir.c */
578 asmlinkage long compat_sys_getdents(unsigned int fd,
579                                     struct compat_linux_dirent __user *dirent,
580                                     unsigned int count);
581 
582 /* fs/read_write.c */
583 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
584 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
585                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
586 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
587                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
588 /* No generic prototype for pread64 and pwrite64 */
589 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
590                 const struct compat_iovec __user *vec,
591                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
592 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
593                 const struct compat_iovec __user *vec,
594                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
595 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
596 asmlinkage long compat_sys_preadv64(unsigned long fd,
597                 const struct compat_iovec __user *vec,
598                 unsigned long vlen, loff_t pos);
599 #endif
600 
601 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
602 asmlinkage long compat_sys_pwritev64(unsigned long fd,
603                 const struct compat_iovec __user *vec,
604                 unsigned long vlen, loff_t pos);
605 #endif
606 
607 /* fs/sendfile.c */
608 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
609                                     compat_off_t __user *offset, compat_size_t count);
610 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
611                                     compat_loff_t __user *offset, compat_size_t count);
612 
613 /* fs/select.c */
614 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
615                                     compat_ulong_t __user *outp,
616                                     compat_ulong_t __user *exp,
617                                     struct old_timespec32 __user *tsp,
618                                     void __user *sig);
619 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
620                                     compat_ulong_t __user *outp,
621                                     compat_ulong_t __user *exp,
622                                     struct __kernel_timespec __user *tsp,
623                                     void __user *sig);
624 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
625                                  unsigned int nfds,
626                                  struct old_timespec32 __user *tsp,
627                                  const compat_sigset_t __user *sigmask,
628                                  compat_size_t sigsetsize);
629 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
630                                  unsigned int nfds,
631                                  struct __kernel_timespec __user *tsp,
632                                  const compat_sigset_t __user *sigmask,
633                                  compat_size_t sigsetsize);
634 
635 /* fs/signalfd.c */
636 asmlinkage long compat_sys_signalfd4(int ufd,
637                                      const compat_sigset_t __user *sigmask,
638                                      compat_size_t sigsetsize, int flags);
639 
640 /* fs/splice.c */
641 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
642                                     unsigned int nr_segs, unsigned int flags);
643 
644 /* fs/stat.c */
645 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
646                                       const char __user *filename,
647                                       struct compat_stat __user *statbuf,
648                                       int flag);
649 asmlinkage long compat_sys_newfstat(unsigned int fd,
650                                     struct compat_stat __user *statbuf);
651 
652 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
653 
654 /* kernel/exit.c */
655 asmlinkage long compat_sys_waitid(int, compat_pid_t,
656                 struct compat_siginfo __user *, int,
657                 struct compat_rusage __user *);
658 
659 
660 
661 /* kernel/futex.c */
662 asmlinkage long
663 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
664                            compat_size_t len);
665 asmlinkage long
666 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
667                            compat_size_t __user *len_ptr);
668 
669 /* kernel/itimer.c */
670 asmlinkage long compat_sys_getitimer(int which,
671                                      struct compat_itimerval __user *it);
672 asmlinkage long compat_sys_setitimer(int which,
673                                      struct compat_itimerval __user *in,
674                                      struct compat_itimerval __user *out);
675 
676 /* kernel/kexec.c */
677 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
678                                       compat_ulong_t nr_segments,
679                                       struct compat_kexec_segment __user *,
680                                       compat_ulong_t flags);
681 
682 /* kernel/posix-timers.c */
683 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
684                         struct compat_sigevent __user *timer_event_spec,
685                         timer_t __user *created_timer_id);
686 
687 /* kernel/ptrace.c */
688 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
689                                   compat_long_t addr, compat_long_t data);
690 
691 /* kernel/sched/core.c */
692 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
693                                      unsigned int len,
694                                      compat_ulong_t __user *user_mask_ptr);
695 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
696                                      unsigned int len,
697                                      compat_ulong_t __user *user_mask_ptr);
698 
699 /* kernel/signal.c */
700 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
701                                        compat_stack_t __user *uoss_ptr);
702 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
703                                          compat_size_t sigsetsize);
704 #ifndef CONFIG_ODD_RT_SIGACTION
705 asmlinkage long compat_sys_rt_sigaction(int,
706                                  const struct compat_sigaction __user *,
707                                  struct compat_sigaction __user *,
708                                  compat_size_t);
709 #endif
710 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
711                                           compat_sigset_t __user *oset,
712                                           compat_size_t sigsetsize);
713 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
714                                          compat_size_t sigsetsize);
715 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
716                 struct compat_siginfo __user *uinfo,
717                 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
718 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
719                 struct compat_siginfo __user *uinfo,
720                 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
721 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
722                                 struct compat_siginfo __user *uinfo);
723 /* No generic prototype for rt_sigreturn */
724 
725 /* kernel/sys.c */
726 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
727 asmlinkage long compat_sys_getrlimit(unsigned int resource,
728                                      struct compat_rlimit __user *rlim);
729 asmlinkage long compat_sys_setrlimit(unsigned int resource,
730                                      struct compat_rlimit __user *rlim);
731 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
732 
733 /* kernel/time.c */
734 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
735                 struct timezone __user *tz);
736 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
737                 struct timezone __user *tz);
738 
739 /* kernel/timer.c */
740 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
741 
742 /* ipc/mqueue.c */
743 asmlinkage long compat_sys_mq_open(const char __user *u_name,
744                         int oflag, compat_mode_t mode,
745                         struct compat_mq_attr __user *u_attr);
746 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
747                         const struct compat_sigevent __user *u_notification);
748 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
749                         const struct compat_mq_attr __user *u_mqstat,
750                         struct compat_mq_attr __user *u_omqstat);
751 
752 /* ipc/msg.c */
753 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
754 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
755                 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
756 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
757                 compat_ssize_t msgsz, int msgflg);
758 
759 /* ipc/sem.c */
760 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
761 
762 /* ipc/shm.c */
763 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
764 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
765 
766 /* net/socket.c */
767 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
768                             unsigned flags, struct sockaddr __user *addr,
769                             int __user *addrlen);
770 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
771                                       char __user *optval, unsigned int optlen);
772 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
773                                       char __user *optval, int __user *optlen);
774 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
775                                    unsigned flags);
776 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
777                                    unsigned int flags);
778 
779 /* mm/filemap.c: No generic prototype for readahead */
780 
781 /* security/keys/keyctl.c */
782 asmlinkage long compat_sys_keyctl(u32 option,
783                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
784 
785 /* arch/example/kernel/sys_example.c */
786 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
787                      const compat_uptr_t __user *envp);
788 
789 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
790 
791 /* mm/, CONFIG_MMU only */
792 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
793                                  compat_ulong_t mode,
794                                  compat_ulong_t __user *nmask,
795                                  compat_ulong_t maxnode, compat_ulong_t flags);
796 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
797                                          compat_ulong_t __user *nmask,
798                                          compat_ulong_t maxnode,
799                                          compat_ulong_t addr,
800                                          compat_ulong_t flags);
801 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
802                                          compat_ulong_t maxnode);
803 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
804                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
805                 const compat_ulong_t __user *new_nodes);
806 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
807                                       __u32 __user *pages,
808                                       const int __user *nodes,
809                                       int __user *status,
810                                       int flags);
811 
812 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
813                                         compat_pid_t pid, int sig,
814                                         struct compat_siginfo __user *uinfo);
815 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
816                                     unsigned vlen, unsigned int flags,
817                                     struct __kernel_timespec __user *timeout);
818 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
819                                     unsigned vlen, unsigned int flags,
820                                     struct old_timespec32 __user *timeout);
821 asmlinkage long compat_sys_wait4(compat_pid_t pid,
822                                  compat_uint_t __user *stat_addr, int options,
823                                  struct compat_rusage __user *ru);
824 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
825                                             int, const char __user *);
826 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
827                                              struct file_handle __user *handle,
828                                              int flags);
829 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
830                                     unsigned vlen, unsigned int flags);
831 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
832                 const struct compat_iovec __user *lvec,
833                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
834                 compat_ulong_t riovcnt, compat_ulong_t flags);
835 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
836                 const struct compat_iovec __user *lvec,
837                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
838                 compat_ulong_t riovcnt, compat_ulong_t flags);
839 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
840                      const compat_uptr_t __user *argv,
841                      const compat_uptr_t __user *envp, int flags);
842 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
843                 const struct compat_iovec __user *vec,
844                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
845 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
846                 const struct compat_iovec __user *vec,
847                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
848 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
849 asmlinkage long  compat_sys_readv64v2(unsigned long fd,
850                 const struct compat_iovec __user *vec,
851                 unsigned long vlen, loff_t pos, rwf_t flags);
852 #endif
853 
854 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
855 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
856                 const struct compat_iovec __user *vec,
857                 unsigned long vlen, loff_t pos, rwf_t flags);
858 #endif
859 
860 
861 /*
862  * Deprecated system calls which are still defined in
863  * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
864  */
865 
866 /* __ARCH_WANT_SYSCALL_NO_AT */
867 asmlinkage long compat_sys_open(const char __user *filename, int flags,
868                                 umode_t mode);
869 
870 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
871 asmlinkage long compat_sys_signalfd(int ufd,
872                                     const compat_sigset_t __user *sigmask,
873                                     compat_size_t sigsetsize);
874 
875 /* __ARCH_WANT_SYSCALL_OFF_T */
876 asmlinkage long compat_sys_newstat(const char __user *filename,
877                                    struct compat_stat __user *statbuf);
878 asmlinkage long compat_sys_newlstat(const char __user *filename,
879                                     struct compat_stat __user *statbuf);
880 
881 /* __ARCH_WANT_SYSCALL_DEPRECATED */
882 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
883                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
884                 struct old_timeval32 __user *tvp);
885 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
886 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
887                                 unsigned flags);
888 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
889 
890 /* obsolete: fs/readdir.c */
891 asmlinkage long compat_sys_old_readdir(unsigned int fd,
892                                        struct compat_old_linux_dirent __user *,
893                                        unsigned int count);
894 
895 /* obsolete: fs/select.c */
896 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
897 
898 /* obsolete: ipc */
899 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
900 
901 /* obsolete: kernel/signal.c */
902 #ifdef __ARCH_WANT_SYS_SIGPENDING
903 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
904 #endif
905 
906 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
907 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
908                                        compat_old_sigset_t __user *oset);
909 #endif
910 #ifdef CONFIG_COMPAT_OLD_SIGACTION
911 asmlinkage long compat_sys_sigaction(int sig,
912                                    const struct compat_old_sigaction __user *act,
913                                    struct compat_old_sigaction __user *oact);
914 #endif
915 
916 /* obsolete: net/socket.c */
917 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
918 
919 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
920 
921 
922 /*
923  * For most but not all architectures, "am I in a compat syscall?" and
924  * "am I a compat task?" are the same question.  For architectures on which
925  * they aren't the same question, arch code can override in_compat_syscall.
926  */
927 
928 #ifndef in_compat_syscall
929 static inline bool in_compat_syscall(void) { return is_compat_task(); }
930 #endif
931 
932 /**
933  * ns_to_old_timeval32 - Compat version of ns_to_timeval
934  * @nsec:       the nanoseconds value to be converted
935  *
936  * Returns the old_timeval32 representation of the nsec parameter.
937  */
938 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
939 {
940         struct timeval tv;
941         struct old_timeval32 ctv;
942 
943         tv = ns_to_timeval(nsec);
944         ctv.tv_sec = tv.tv_sec;
945         ctv.tv_usec = tv.tv_usec;
946 
947         return ctv;
948 }
949 
950 /*
951  * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
952  * directly.  Instead, use one of the functions which work equivalently, such
953  * as the kcompat_sys_xyzyyz() functions prototyped below.
954  */
955 
956 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
957                      struct compat_statfs64 __user * buf);
958 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
959                           struct compat_statfs64 __user * buf);
960 
961 #else /* !CONFIG_COMPAT */
962 
963 #define is_compat_task() (0)
964 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
965 #define in_compat_syscall in_compat_syscall
966 static inline bool in_compat_syscall(void) { return false; }
967 
968 #endif /* CONFIG_COMPAT */
969 
970 #endif /* _LINUX_COMPAT_H */
971 

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