Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[muen/linux.git] / 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 #include <linux/compat_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         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));       \
76         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))        \
77                 __attribute__((alias(__stringify(__se_compat_sys##name))));     \
78         ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO);                         \
79         static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
80         asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));  \
81         asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))   \
82         {                                                                       \
83                 return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
84         }                                                                       \
85         static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
86 #endif /* COMPAT_SYSCALL_DEFINEx */
87
88 #ifdef CONFIG_COMPAT
89
90 #ifndef compat_user_stack_pointer
91 #define compat_user_stack_pointer() current_user_stack_pointer()
92 #endif
93 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
94 typedef struct compat_sigaltstack {
95         compat_uptr_t                   ss_sp;
96         int                             ss_flags;
97         compat_size_t                   ss_size;
98 } compat_stack_t;
99 #endif
100
101 #define compat_jiffies_to_clock_t(x)    \
102                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
103
104 typedef __compat_uid32_t        compat_uid_t;
105 typedef __compat_gid32_t        compat_gid_t;
106
107 typedef compat_ulong_t          compat_aio_context_t;
108
109 struct compat_sel_arg_struct;
110 struct rusage;
111
112 struct compat_itimerspec {
113         struct compat_timespec it_interval;
114         struct compat_timespec it_value;
115 };
116
117 struct compat_utimbuf {
118         compat_time_t           actime;
119         compat_time_t           modtime;
120 };
121
122 struct compat_itimerval {
123         struct compat_timeval   it_interval;
124         struct compat_timeval   it_value;
125 };
126
127 struct itimerval;
128 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
129 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
130
131 struct compat_tms {
132         compat_clock_t          tms_utime;
133         compat_clock_t          tms_stime;
134         compat_clock_t          tms_cutime;
135         compat_clock_t          tms_cstime;
136 };
137
138 struct compat_timex {
139         compat_uint_t modes;
140         compat_long_t offset;
141         compat_long_t freq;
142         compat_long_t maxerror;
143         compat_long_t esterror;
144         compat_int_t status;
145         compat_long_t constant;
146         compat_long_t precision;
147         compat_long_t tolerance;
148         struct compat_timeval time;
149         compat_long_t tick;
150         compat_long_t ppsfreq;
151         compat_long_t jitter;
152         compat_int_t shift;
153         compat_long_t stabil;
154         compat_long_t jitcnt;
155         compat_long_t calcnt;
156         compat_long_t errcnt;
157         compat_long_t stbcnt;
158         compat_int_t tai;
159
160         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
161         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
162         compat_int_t:32; compat_int_t:32; compat_int_t:32;
163 };
164
165 struct timex;
166 int compat_get_timex(struct timex *, const struct compat_timex __user *);
167 int compat_put_timex(struct compat_timex __user *, const struct timex *);
168
169 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
170
171 typedef struct {
172         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
173 } compat_sigset_t;
174
175 struct compat_sigaction {
176 #ifndef __ARCH_HAS_IRIX_SIGACTION
177         compat_uptr_t                   sa_handler;
178         compat_ulong_t                  sa_flags;
179 #else
180         compat_uint_t                   sa_flags;
181         compat_uptr_t                   sa_handler;
182 #endif
183 #ifdef __ARCH_HAS_SA_RESTORER
184         compat_uptr_t                   sa_restorer;
185 #endif
186         compat_sigset_t                 sa_mask __packed;
187 };
188
189 typedef union compat_sigval {
190         compat_int_t    sival_int;
191         compat_uptr_t   sival_ptr;
192 } compat_sigval_t;
193
194 typedef struct compat_siginfo {
195         int si_signo;
196 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
197         int si_errno;
198         int si_code;
199 #else
200         int si_code;
201         int si_errno;
202 #endif
203
204         union {
205                 int _pad[128/sizeof(int) - 3];
206
207                 /* kill() */
208                 struct {
209                         compat_pid_t _pid;      /* sender's pid */
210                         __compat_uid32_t _uid;  /* sender's uid */
211                 } _kill;
212
213                 /* POSIX.1b timers */
214                 struct {
215                         compat_timer_t _tid;    /* timer id */
216                         int _overrun;           /* overrun count */
217                         compat_sigval_t _sigval;        /* same as below */
218                 } _timer;
219
220                 /* POSIX.1b signals */
221                 struct {
222                         compat_pid_t _pid;      /* sender's pid */
223                         __compat_uid32_t _uid;  /* sender's uid */
224                         compat_sigval_t _sigval;
225                 } _rt;
226
227                 /* SIGCHLD */
228                 struct {
229                         compat_pid_t _pid;      /* which child */
230                         __compat_uid32_t _uid;  /* sender's uid */
231                         int _status;            /* exit code */
232                         compat_clock_t _utime;
233                         compat_clock_t _stime;
234                 } _sigchld;
235
236 #ifdef CONFIG_X86_X32_ABI
237                 /* SIGCHLD (x32 version) */
238                 struct {
239                         compat_pid_t _pid;      /* which child */
240                         __compat_uid32_t _uid;  /* sender's uid */
241                         int _status;            /* exit code */
242                         compat_s64 _utime;
243                         compat_s64 _stime;
244                 } _sigchld_x32;
245 #endif
246
247                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
248                 struct {
249                         compat_uptr_t _addr;    /* faulting insn/memory ref. */
250 #ifdef __ARCH_SI_TRAPNO
251                         int _trapno;    /* TRAP # which caused the signal */
252 #endif
253 #define __COMPAT_ADDR_BND_PKEY_PAD  (__alignof__(compat_uptr_t) < sizeof(short) ? \
254                                      sizeof(short) : __alignof__(compat_uptr_t))
255                         union {
256                                 /*
257                                  * used when si_code=BUS_MCEERR_AR or
258                                  * used when si_code=BUS_MCEERR_AO
259                                  */
260                                 short int _addr_lsb;    /* Valid LSB of the reported address. */
261                                 /* used when si_code=SEGV_BNDERR */
262                                 struct {
263                                         char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
264                                         compat_uptr_t _lower;
265                                         compat_uptr_t _upper;
266                                 } _addr_bnd;
267                                 /* used when si_code=SEGV_PKUERR */
268                                 struct {
269                                         char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
270                                         u32 _pkey;
271                                 } _addr_pkey;
272                         };
273                 } _sigfault;
274
275                 /* SIGPOLL */
276                 struct {
277                         compat_long_t _band;    /* POLL_IN, POLL_OUT, POLL_MSG */
278                         int _fd;
279                 } _sigpoll;
280
281                 struct {
282                         compat_uptr_t _call_addr; /* calling user insn */
283                         int _syscall;   /* triggering system call number */
284                         unsigned int _arch;     /* AUDIT_ARCH_* of syscall */
285                 } _sigsys;
286         } _sifields;
287 } compat_siginfo_t;
288
289 /*
290  * These functions operate on 32- or 64-bit specs depending on
291  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
292  */
293 extern int compat_get_timespec(struct timespec *, const void __user *);
294 extern int compat_put_timespec(const struct timespec *, void __user *);
295 extern int compat_get_timeval(struct timeval *, const void __user *);
296 extern int compat_put_timeval(const struct timeval *, void __user *);
297 extern int get_compat_itimerspec64(struct itimerspec64 *its,
298                         const struct compat_itimerspec __user *uits);
299 extern int put_compat_itimerspec64(const struct itimerspec64 *its,
300                         struct compat_itimerspec __user *uits);
301
302 struct compat_iovec {
303         compat_uptr_t   iov_base;
304         compat_size_t   iov_len;
305 };
306
307 struct compat_rlimit {
308         compat_ulong_t  rlim_cur;
309         compat_ulong_t  rlim_max;
310 };
311
312 struct compat_rusage {
313         struct compat_timeval ru_utime;
314         struct compat_timeval ru_stime;
315         compat_long_t   ru_maxrss;
316         compat_long_t   ru_ixrss;
317         compat_long_t   ru_idrss;
318         compat_long_t   ru_isrss;
319         compat_long_t   ru_minflt;
320         compat_long_t   ru_majflt;
321         compat_long_t   ru_nswap;
322         compat_long_t   ru_inblock;
323         compat_long_t   ru_oublock;
324         compat_long_t   ru_msgsnd;
325         compat_long_t   ru_msgrcv;
326         compat_long_t   ru_nsignals;
327         compat_long_t   ru_nvcsw;
328         compat_long_t   ru_nivcsw;
329 };
330
331 extern int put_compat_rusage(const struct rusage *,
332                              struct compat_rusage __user *);
333
334 struct compat_siginfo;
335 struct __compat_aio_sigset;
336
337 struct compat_dirent {
338         u32             d_ino;
339         compat_off_t    d_off;
340         u16             d_reclen;
341         char            d_name[256];
342 };
343
344 struct compat_ustat {
345         compat_daddr_t          f_tfree;
346         compat_ino_t            f_tinode;
347         char                    f_fname[6];
348         char                    f_fpack[6];
349 };
350
351 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
352
353 typedef struct compat_sigevent {
354         compat_sigval_t sigev_value;
355         compat_int_t sigev_signo;
356         compat_int_t sigev_notify;
357         union {
358                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
359                 compat_int_t _tid;
360
361                 struct {
362                         compat_uptr_t _function;
363                         compat_uptr_t _attribute;
364                 } _sigev_thread;
365         } _sigev_un;
366 } compat_sigevent_t;
367
368 struct compat_ifmap {
369         compat_ulong_t mem_start;
370         compat_ulong_t mem_end;
371         unsigned short base_addr;
372         unsigned char irq;
373         unsigned char dma;
374         unsigned char port;
375 };
376
377 struct compat_if_settings {
378         unsigned int type;      /* Type of physical device or protocol */
379         unsigned int size;      /* Size of the data allocated by the caller */
380         compat_uptr_t ifs_ifsu; /* union of pointers */
381 };
382
383 struct compat_ifreq {
384         union {
385                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
386         } ifr_ifrn;
387         union {
388                 struct  sockaddr ifru_addr;
389                 struct  sockaddr ifru_dstaddr;
390                 struct  sockaddr ifru_broadaddr;
391                 struct  sockaddr ifru_netmask;
392                 struct  sockaddr ifru_hwaddr;
393                 short   ifru_flags;
394                 compat_int_t    ifru_ivalue;
395                 compat_int_t    ifru_mtu;
396                 struct  compat_ifmap ifru_map;
397                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
398                 char    ifru_newname[IFNAMSIZ];
399                 compat_caddr_t  ifru_data;
400                 struct  compat_if_settings ifru_settings;
401         } ifr_ifru;
402 };
403
404 struct compat_ifconf {
405         compat_int_t    ifc_len;                /* size of buffer */
406         compat_caddr_t  ifcbuf;
407 };
408
409 struct compat_robust_list {
410         compat_uptr_t                   next;
411 };
412
413 struct compat_robust_list_head {
414         struct compat_robust_list       list;
415         compat_long_t                   futex_offset;
416         compat_uptr_t                   list_op_pending;
417 };
418
419 #ifdef CONFIG_COMPAT_OLD_SIGACTION
420 struct compat_old_sigaction {
421         compat_uptr_t                   sa_handler;
422         compat_old_sigset_t             sa_mask;
423         compat_ulong_t                  sa_flags;
424         compat_uptr_t                   sa_restorer;
425 };
426 #endif
427
428 struct compat_keyctl_kdf_params {
429         compat_uptr_t hashname;
430         compat_uptr_t otherinfo;
431         __u32 otherinfolen;
432         __u32 __spare[8];
433 };
434
435 struct compat_statfs;
436 struct compat_statfs64;
437 struct compat_old_linux_dirent;
438 struct compat_linux_dirent;
439 struct linux_dirent64;
440 struct compat_msghdr;
441 struct compat_mmsghdr;
442 struct compat_sysinfo;
443 struct compat_sysctl_args;
444 struct compat_kexec_segment;
445 struct compat_mq_attr;
446 struct compat_msgbuf;
447
448 extern void compat_exit_robust_list(struct task_struct *curr);
449
450 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
451
452 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
453
454 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
455                        unsigned long bitmap_size);
456 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
457                        unsigned long bitmap_size);
458 int copy_siginfo_from_user32(siginfo_t *to, const struct compat_siginfo __user *from);
459 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
460 int get_compat_sigevent(struct sigevent *event,
461                 const struct compat_sigevent __user *u_event);
462
463 static inline int compat_timeval_compare(struct compat_timeval *lhs,
464                                         struct compat_timeval *rhs)
465 {
466         if (lhs->tv_sec < rhs->tv_sec)
467                 return -1;
468         if (lhs->tv_sec > rhs->tv_sec)
469                 return 1;
470         return lhs->tv_usec - rhs->tv_usec;
471 }
472
473 static inline int compat_timespec_compare(struct compat_timespec *lhs,
474                                         struct compat_timespec *rhs)
475 {
476         if (lhs->tv_sec < rhs->tv_sec)
477                 return -1;
478         if (lhs->tv_sec > rhs->tv_sec)
479                 return 1;
480         return lhs->tv_nsec - rhs->tv_nsec;
481 }
482
483 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
484
485 /*
486  * Defined inline such that size can be compile time constant, which avoids
487  * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
488  */
489 static inline int
490 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
491                   unsigned int size)
492 {
493         /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
494 #ifdef __BIG_ENDIAN
495         compat_sigset_t v;
496         switch (_NSIG_WORDS) {
497         case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
498         case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
499         case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
500         case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
501         }
502         return copy_to_user(compat, &v, size) ? -EFAULT : 0;
503 #else
504         return copy_to_user(compat, set, size) ? -EFAULT : 0;
505 #endif
506 }
507
508 extern int compat_ptrace_request(struct task_struct *child,
509                                  compat_long_t request,
510                                  compat_ulong_t addr, compat_ulong_t data);
511
512 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
513                                compat_ulong_t addr, compat_ulong_t data);
514
515 struct epoll_event;     /* fortunately, this one is fixed-layout */
516
517 extern ssize_t compat_rw_copy_check_uvector(int type,
518                 const struct compat_iovec __user *uvector,
519                 unsigned long nr_segs,
520                 unsigned long fast_segs, struct iovec *fast_pointer,
521                 struct iovec **ret_pointer);
522
523 extern void __user *compat_alloc_user_space(unsigned long len);
524
525 int compat_restore_altstack(const compat_stack_t __user *uss);
526 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
527 #define compat_save_altstack_ex(uss, sp) do { \
528         compat_stack_t __user *__uss = uss; \
529         struct task_struct *t = current; \
530         put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
531         put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
532         put_user_ex(t->sas_ss_size, &__uss->ss_size); \
533         if (t->sas_ss_flags & SS_AUTODISARM) \
534                 sas_ss_reset(t); \
535 } while (0);
536
537 /*
538  * These syscall function prototypes are kept in the same order as
539  * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
540  * go below.
541  *
542  * Please note that these prototypes here are only provided for information
543  * purposes, for static analysis, and for linking from the syscall table.
544  * These functions should not be called elsewhere from kernel code.
545  *
546  * As the syscall calling convention may be different from the default
547  * for architectures overriding the syscall calling convention, do not
548  * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
549  */
550 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
551 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
552 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
553                                      u32 __user *iocb);
554 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
555                                         compat_long_t min_nr,
556                                         compat_long_t nr,
557                                         struct io_event __user *events,
558                                         struct compat_timespec __user *timeout);
559 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
560                                         compat_long_t min_nr,
561                                         compat_long_t nr,
562                                         struct io_event __user *events,
563                                         struct compat_timespec __user *timeout,
564                                         const struct __compat_aio_sigset __user *usig);
565
566 /* fs/cookies.c */
567 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
568
569 /* fs/eventpoll.c */
570 asmlinkage long compat_sys_epoll_pwait(int epfd,
571                         struct epoll_event __user *events,
572                         int maxevents, int timeout,
573                         const compat_sigset_t __user *sigmask,
574                         compat_size_t sigsetsize);
575
576 /* fs/fcntl.c */
577 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
578                                  compat_ulong_t arg);
579 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
580                                    compat_ulong_t arg);
581
582 /* fs/ioctl.c */
583 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
584                                  compat_ulong_t arg);
585
586 /* fs/namespace.c */
587 asmlinkage long compat_sys_mount(const char __user *dev_name,
588                                  const char __user *dir_name,
589                                  const char __user *type, compat_ulong_t flags,
590                                  const void __user *data);
591
592 /* fs/open.c */
593 asmlinkage long compat_sys_statfs(const char __user *pathname,
594                                   struct compat_statfs __user *buf);
595 asmlinkage long compat_sys_statfs64(const char __user *pathname,
596                                     compat_size_t sz,
597                                     struct compat_statfs64 __user *buf);
598 asmlinkage long compat_sys_fstatfs(unsigned int fd,
599                                    struct compat_statfs __user *buf);
600 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
601                                      struct compat_statfs64 __user *buf);
602 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
603 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
604 /* No generic prototype for truncate64, ftruncate64, fallocate */
605 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
606                                   int flags, umode_t mode);
607
608 /* fs/readdir.c */
609 asmlinkage long compat_sys_getdents(unsigned int fd,
610                                     struct compat_linux_dirent __user *dirent,
611                                     unsigned int count);
612
613 /* fs/read_write.c */
614 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
615 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
616                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
617 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
618                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
619 /* No generic prototype for pread64 and pwrite64 */
620 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
621                 const struct compat_iovec __user *vec,
622                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
623 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
624                 const struct compat_iovec __user *vec,
625                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
626 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
627 asmlinkage long compat_sys_preadv64(unsigned long fd,
628                 const struct compat_iovec __user *vec,
629                 unsigned long vlen, loff_t pos);
630 #endif
631
632 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
633 asmlinkage long compat_sys_pwritev64(unsigned long fd,
634                 const struct compat_iovec __user *vec,
635                 unsigned long vlen, loff_t pos);
636 #endif
637
638 /* fs/sendfile.c */
639 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
640                                     compat_off_t __user *offset, compat_size_t count);
641 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
642                                     compat_loff_t __user *offset, compat_size_t count);
643
644 /* fs/select.c */
645 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
646                                     compat_ulong_t __user *outp,
647                                     compat_ulong_t __user *exp,
648                                     struct compat_timespec __user *tsp,
649                                     void __user *sig);
650 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
651                                  unsigned int nfds,
652                                  struct compat_timespec __user *tsp,
653                                  const compat_sigset_t __user *sigmask,
654                                  compat_size_t sigsetsize);
655
656 /* fs/signalfd.c */
657 asmlinkage long compat_sys_signalfd4(int ufd,
658                                      const compat_sigset_t __user *sigmask,
659                                      compat_size_t sigsetsize, int flags);
660
661 /* fs/splice.c */
662 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
663                                     unsigned int nr_segs, unsigned int flags);
664
665 /* fs/stat.c */
666 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
667                                       const char __user *filename,
668                                       struct compat_stat __user *statbuf,
669                                       int flag);
670 asmlinkage long compat_sys_newfstat(unsigned int fd,
671                                     struct compat_stat __user *statbuf);
672
673 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
674
675 /* fs/timerfd.c */
676 asmlinkage long compat_sys_timerfd_gettime(int ufd,
677                                    struct compat_itimerspec __user *otmr);
678 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
679                                    const struct compat_itimerspec __user *utmr,
680                                    struct compat_itimerspec __user *otmr);
681
682 /* fs/utimes.c */
683 asmlinkage long compat_sys_utimensat(unsigned int dfd,
684                                      const char __user *filename,
685                                      struct compat_timespec __user *t,
686                                      int flags);
687
688 /* kernel/exit.c */
689 asmlinkage long compat_sys_waitid(int, compat_pid_t,
690                 struct compat_siginfo __user *, int,
691                 struct compat_rusage __user *);
692
693
694
695 /* kernel/futex.c */
696 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
697                 struct compat_timespec __user *utime, u32 __user *uaddr2,
698                 u32 val3);
699 asmlinkage long
700 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
701                            compat_size_t len);
702 asmlinkage long
703 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
704                            compat_size_t __user *len_ptr);
705
706 /* kernel/hrtimer.c */
707 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
708                                      struct compat_timespec __user *rmtp);
709
710 /* kernel/itimer.c */
711 asmlinkage long compat_sys_getitimer(int which,
712                                      struct compat_itimerval __user *it);
713 asmlinkage long compat_sys_setitimer(int which,
714                                      struct compat_itimerval __user *in,
715                                      struct compat_itimerval __user *out);
716
717 /* kernel/kexec.c */
718 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
719                                       compat_ulong_t nr_segments,
720                                       struct compat_kexec_segment __user *,
721                                       compat_ulong_t flags);
722
723 /* kernel/posix-timers.c */
724 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
725                         struct compat_sigevent __user *timer_event_spec,
726                         timer_t __user *created_timer_id);
727 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
728                                  struct compat_itimerspec __user *setting);
729 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
730                                          struct compat_itimerspec __user *new,
731                                          struct compat_itimerspec __user *old);
732 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
733                                          struct compat_timespec __user *tp);
734 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
735                                          struct compat_timespec __user *tp);
736 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
737                                         struct compat_timespec __user *tp);
738 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
739                                            struct compat_timespec __user *rqtp,
740                                            struct compat_timespec __user *rmtp);
741
742 /* kernel/ptrace.c */
743 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
744                                   compat_long_t addr, compat_long_t data);
745
746 /* kernel/sched/core.c */
747 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
748                                      unsigned int len,
749                                      compat_ulong_t __user *user_mask_ptr);
750 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
751                                      unsigned int len,
752                                      compat_ulong_t __user *user_mask_ptr);
753 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
754                                                  struct compat_timespec __user *interval);
755
756 /* kernel/signal.c */
757 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
758                                        compat_stack_t __user *uoss_ptr);
759 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
760                                          compat_size_t sigsetsize);
761 #ifndef CONFIG_ODD_RT_SIGACTION
762 asmlinkage long compat_sys_rt_sigaction(int,
763                                  const struct compat_sigaction __user *,
764                                  struct compat_sigaction __user *,
765                                  compat_size_t);
766 #endif
767 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
768                                           compat_sigset_t __user *oset,
769                                           compat_size_t sigsetsize);
770 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
771                                          compat_size_t sigsetsize);
772 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
773                 struct compat_siginfo __user *uinfo,
774                 struct compat_timespec __user *uts, compat_size_t sigsetsize);
775 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
776                                 struct compat_siginfo __user *uinfo);
777 /* No generic prototype for rt_sigreturn */
778
779 /* kernel/sys.c */
780 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
781 asmlinkage long compat_sys_getrlimit(unsigned int resource,
782                                      struct compat_rlimit __user *rlim);
783 asmlinkage long compat_sys_setrlimit(unsigned int resource,
784                                      struct compat_rlimit __user *rlim);
785 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
786
787 /* kernel/time.c */
788 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
789                 struct timezone __user *tz);
790 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
791                 struct timezone __user *tz);
792 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
793
794 /* kernel/timer.c */
795 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
796
797 /* ipc/mqueue.c */
798 asmlinkage long compat_sys_mq_open(const char __user *u_name,
799                         int oflag, compat_mode_t mode,
800                         struct compat_mq_attr __user *u_attr);
801 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
802                         const char __user *u_msg_ptr,
803                         compat_size_t msg_len, unsigned int msg_prio,
804                         const struct compat_timespec __user *u_abs_timeout);
805 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
806                         char __user *u_msg_ptr,
807                         compat_size_t msg_len, unsigned int __user *u_msg_prio,
808                         const struct compat_timespec __user *u_abs_timeout);
809 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
810                         const struct compat_sigevent __user *u_notification);
811 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
812                         const struct compat_mq_attr __user *u_mqstat,
813                         struct compat_mq_attr __user *u_omqstat);
814
815 /* ipc/msg.c */
816 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
817 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
818                 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
819 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
820                 compat_ssize_t msgsz, int msgflg);
821
822 /* ipc/sem.c */
823 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
824 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
825                 unsigned nsems, const struct compat_timespec __user *timeout);
826
827 /* ipc/shm.c */
828 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
829 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
830
831 /* net/socket.c */
832 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
833                             unsigned flags, struct sockaddr __user *addr,
834                             int __user *addrlen);
835 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
836                                       char __user *optval, unsigned int optlen);
837 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
838                                       char __user *optval, int __user *optlen);
839 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
840                                    unsigned flags);
841 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
842                                    unsigned int flags);
843
844 /* mm/filemap.c: No generic prototype for readahead */
845
846 /* security/keys/keyctl.c */
847 asmlinkage long compat_sys_keyctl(u32 option,
848                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
849
850 /* arch/example/kernel/sys_example.c */
851 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
852                      const compat_uptr_t __user *envp);
853
854 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
855
856 /* mm/, CONFIG_MMU only */
857 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
858                                  compat_ulong_t mode,
859                                  compat_ulong_t __user *nmask,
860                                  compat_ulong_t maxnode, compat_ulong_t flags);
861 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
862                                          compat_ulong_t __user *nmask,
863                                          compat_ulong_t maxnode,
864                                          compat_ulong_t addr,
865                                          compat_ulong_t flags);
866 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
867                                          compat_ulong_t maxnode);
868 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
869                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
870                 const compat_ulong_t __user *new_nodes);
871 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
872                                       __u32 __user *pages,
873                                       const int __user *nodes,
874                                       int __user *status,
875                                       int flags);
876
877 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
878                                         compat_pid_t pid, int sig,
879                                         struct compat_siginfo __user *uinfo);
880 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
881                                     unsigned vlen, unsigned int flags,
882                                     struct compat_timespec __user *timeout);
883 asmlinkage long compat_sys_wait4(compat_pid_t pid,
884                                  compat_uint_t __user *stat_addr, int options,
885                                  struct compat_rusage __user *ru);
886 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
887                                             int, const char __user *);
888 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
889                                              struct file_handle __user *handle,
890                                              int flags);
891 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
892                                          struct compat_timex __user *tp);
893 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
894                                     unsigned vlen, unsigned int flags);
895 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
896                 const struct compat_iovec __user *lvec,
897                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
898                 compat_ulong_t riovcnt, compat_ulong_t flags);
899 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
900                 const struct compat_iovec __user *lvec,
901                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
902                 compat_ulong_t riovcnt, compat_ulong_t flags);
903 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
904                      const compat_uptr_t __user *argv,
905                      const compat_uptr_t __user *envp, int flags);
906 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
907                 const struct compat_iovec __user *vec,
908                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
909 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
910                 const struct compat_iovec __user *vec,
911                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
912 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
913 asmlinkage long  compat_sys_readv64v2(unsigned long fd,
914                 const struct compat_iovec __user *vec,
915                 unsigned long vlen, loff_t pos, rwf_t flags);
916 #endif
917
918 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
919 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
920                 const struct compat_iovec __user *vec,
921                 unsigned long vlen, loff_t pos, rwf_t flags);
922 #endif
923
924
925 /*
926  * Deprecated system calls which are still defined in
927  * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
928  */
929
930 /* __ARCH_WANT_SYSCALL_NO_AT */
931 asmlinkage long compat_sys_open(const char __user *filename, int flags,
932                                 umode_t mode);
933 asmlinkage long compat_sys_utimes(const char __user *filename,
934                                   struct compat_timeval __user *t);
935
936 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
937 asmlinkage long compat_sys_signalfd(int ufd,
938                                     const compat_sigset_t __user *sigmask,
939                                     compat_size_t sigsetsize);
940
941 /* __ARCH_WANT_SYSCALL_OFF_T */
942 asmlinkage long compat_sys_newstat(const char __user *filename,
943                                    struct compat_stat __user *statbuf);
944 asmlinkage long compat_sys_newlstat(const char __user *filename,
945                                     struct compat_stat __user *statbuf);
946
947 /* __ARCH_WANT_SYSCALL_DEPRECATED */
948 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
949 asmlinkage long compat_sys_utime(const char __user *filename,
950                                  struct compat_utimbuf __user *t);
951 asmlinkage long compat_sys_futimesat(unsigned int dfd,
952                                      const char __user *filename,
953                                      struct compat_timeval __user *t);
954 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
955                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
956                 struct compat_timeval __user *tvp);
957 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
958 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
959                                 unsigned flags);
960 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
961
962 /* obsolete: fs/readdir.c */
963 asmlinkage long compat_sys_old_readdir(unsigned int fd,
964                                        struct compat_old_linux_dirent __user *,
965                                        unsigned int count);
966
967 /* obsolete: fs/select.c */
968 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
969
970 /* obsolete: ipc */
971 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
972
973 /* obsolete: kernel/signal.c */
974 #ifdef __ARCH_WANT_SYS_SIGPENDING
975 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
976 #endif
977
978 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
979 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
980                                        compat_old_sigset_t __user *oset);
981 #endif
982 #ifdef CONFIG_COMPAT_OLD_SIGACTION
983 asmlinkage long compat_sys_sigaction(int sig,
984                                    const struct compat_old_sigaction __user *act,
985                                    struct compat_old_sigaction __user *oact);
986 #endif
987
988 /* obsolete: kernel/time/time.c */
989 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
990
991 /* obsolete: net/socket.c */
992 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
993
994 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
995
996
997 /*
998  * For most but not all architectures, "am I in a compat syscall?" and
999  * "am I a compat task?" are the same question.  For architectures on which
1000  * they aren't the same question, arch code can override in_compat_syscall.
1001  */
1002
1003 #ifndef in_compat_syscall
1004 static inline bool in_compat_syscall(void) { return is_compat_task(); }
1005 #endif
1006
1007 /**
1008  * ns_to_compat_timeval - Compat version of ns_to_timeval
1009  * @nsec:       the nanoseconds value to be converted
1010  *
1011  * Returns the compat_timeval representation of the nsec parameter.
1012  */
1013 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
1014 {
1015         struct timeval tv;
1016         struct compat_timeval ctv;
1017
1018         tv = ns_to_timeval(nsec);
1019         ctv.tv_sec = tv.tv_sec;
1020         ctv.tv_usec = tv.tv_usec;
1021
1022         return ctv;
1023 }
1024
1025 #else /* !CONFIG_COMPAT */
1026
1027 #define is_compat_task() (0)
1028 #ifndef in_compat_syscall
1029 static inline bool in_compat_syscall(void) { return false; }
1030 #endif
1031
1032 #endif /* CONFIG_COMPAT */
1033
1034 #endif /* _LINUX_COMPAT_H */