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[mirror_ubuntu-bionic-kernel.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
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 extern void compat_exit_robust_list(struct task_struct *curr);
328
329 asmlinkage long
330 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
331 compat_size_t len);
332 asmlinkage long
333 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
334 compat_size_t __user *len_ptr);
335
336 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
337 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
338 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
339 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
340 compat_ssize_t msgsz, int msgflg);
341 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
342 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
343 long compat_sys_msgctl(int first, int second, void __user *uptr);
344 long compat_sys_shmctl(int first, int second, void __user *uptr);
345 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
346 unsigned nsems, const struct compat_timespec __user *timeout);
347 asmlinkage long compat_sys_keyctl(u32 option,
348 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
349 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
350
351 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
352 const struct compat_iovec __user *vec, compat_ulong_t vlen);
353 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
354 const struct compat_iovec __user *vec, compat_ulong_t vlen);
355 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
356 const struct compat_iovec __user *vec,
357 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
358 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
359 const struct compat_iovec __user *vec,
360 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
361 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
362 const struct compat_iovec __user *vec,
363 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
364 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
365 const struct compat_iovec __user *vec,
366 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
367
368 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
369 asmlinkage long compat_sys_preadv64(unsigned long fd,
370 const struct compat_iovec __user *vec,
371 unsigned long vlen, loff_t pos);
372 #endif
373
374 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
375 asmlinkage long compat_sys_pwritev64(unsigned long fd,
376 const struct compat_iovec __user *vec,
377 unsigned long vlen, loff_t pos);
378 #endif
379
380 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
381 asmlinkage long compat_sys_readv64v2(unsigned long fd,
382 const struct compat_iovec __user *vec,
383 unsigned long vlen, loff_t pos, rwf_t flags);
384 #endif
385
386 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
387 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
388 const struct compat_iovec __user *vec,
389 unsigned long vlen, loff_t pos, rwf_t flags);
390 #endif
391
392 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
393
394 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
395 const compat_uptr_t __user *envp);
396 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
397 const compat_uptr_t __user *argv,
398 const compat_uptr_t __user *envp, int flags);
399
400 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
401 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
402 struct compat_timeval __user *tvp);
403
404 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
405
406 asmlinkage long compat_sys_wait4(compat_pid_t pid,
407 compat_uint_t __user *stat_addr, int options,
408 struct compat_rusage __user *ru);
409
410 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
411
412 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
413
414 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
415 unsigned long bitmap_size);
416 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
417 unsigned long bitmap_size);
418 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
419 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
420 int get_compat_sigevent(struct sigevent *event,
421 const struct compat_sigevent __user *u_event);
422 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
423 struct compat_siginfo __user *uinfo);
424 #ifdef CONFIG_COMPAT_OLD_SIGACTION
425 asmlinkage long compat_sys_sigaction(int sig,
426 const struct compat_old_sigaction __user *act,
427 struct compat_old_sigaction __user *oact);
428 #endif
429
430 static inline int compat_timeval_compare(struct compat_timeval *lhs,
431 struct compat_timeval *rhs)
432 {
433 if (lhs->tv_sec < rhs->tv_sec)
434 return -1;
435 if (lhs->tv_sec > rhs->tv_sec)
436 return 1;
437 return lhs->tv_usec - rhs->tv_usec;
438 }
439
440 static inline int compat_timespec_compare(struct compat_timespec *lhs,
441 struct compat_timespec *rhs)
442 {
443 if (lhs->tv_sec < rhs->tv_sec)
444 return -1;
445 if (lhs->tv_sec > rhs->tv_sec)
446 return 1;
447 return lhs->tv_nsec - rhs->tv_nsec;
448 }
449
450 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
451 struct timezone __user *tz);
452 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
453 struct timezone __user *tz);
454
455 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
456
457 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
458 extern int put_compat_sigset(compat_sigset_t __user *compat,
459 const sigset_t *set, unsigned int size);
460
461 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
462 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
463 const compat_ulong_t __user *new_nodes);
464
465 extern int compat_ptrace_request(struct task_struct *child,
466 compat_long_t request,
467 compat_ulong_t addr, compat_ulong_t data);
468
469 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
470 compat_ulong_t addr, compat_ulong_t data);
471 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
472 compat_long_t addr, compat_long_t data);
473
474 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
475 /*
476 * epoll (fs/eventpoll.c) compat bits follow ...
477 */
478 struct epoll_event; /* fortunately, this one is fixed-layout */
479 asmlinkage long compat_sys_epoll_pwait(int epfd,
480 struct epoll_event __user *events,
481 int maxevents, int timeout,
482 const compat_sigset_t __user *sigmask,
483 compat_size_t sigsetsize);
484
485 asmlinkage long compat_sys_utime(const char __user *filename,
486 struct compat_utimbuf __user *t);
487 asmlinkage long compat_sys_utimensat(unsigned int dfd,
488 const char __user *filename,
489 struct compat_timespec __user *t,
490 int flags);
491
492 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
493 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
494 asmlinkage long compat_sys_signalfd(int ufd,
495 const compat_sigset_t __user *sigmask,
496 compat_size_t sigsetsize);
497 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
498 const struct compat_itimerspec __user *utmr,
499 struct compat_itimerspec __user *otmr);
500 asmlinkage long compat_sys_timerfd_gettime(int ufd,
501 struct compat_itimerspec __user *otmr);
502
503 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
504 __u32 __user *pages,
505 const int __user *nodes,
506 int __user *status,
507 int flags);
508 asmlinkage long compat_sys_futimesat(unsigned int dfd,
509 const char __user *filename,
510 struct compat_timeval __user *t);
511 asmlinkage long compat_sys_utimes(const char __user *filename,
512 struct compat_timeval __user *t);
513 asmlinkage long compat_sys_newstat(const char __user *filename,
514 struct compat_stat __user *statbuf);
515 asmlinkage long compat_sys_newlstat(const char __user *filename,
516 struct compat_stat __user *statbuf);
517 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
518 const char __user *filename,
519 struct compat_stat __user *statbuf,
520 int flag);
521 asmlinkage long compat_sys_newfstat(unsigned int fd,
522 struct compat_stat __user *statbuf);
523 asmlinkage long compat_sys_statfs(const char __user *pathname,
524 struct compat_statfs __user *buf);
525 asmlinkage long compat_sys_fstatfs(unsigned int fd,
526 struct compat_statfs __user *buf);
527 asmlinkage long compat_sys_statfs64(const char __user *pathname,
528 compat_size_t sz,
529 struct compat_statfs64 __user *buf);
530 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
531 struct compat_statfs64 __user *buf);
532 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
533 compat_ulong_t arg);
534 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
535 compat_ulong_t arg);
536 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
537 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
538 compat_long_t min_nr,
539 compat_long_t nr,
540 struct io_event __user *events,
541 struct compat_timespec __user *timeout);
542 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
543 u32 __user *iocb);
544 asmlinkage long compat_sys_mount(const char __user *dev_name,
545 const char __user *dir_name,
546 const char __user *type, compat_ulong_t flags,
547 const void __user *data);
548 asmlinkage long compat_sys_old_readdir(unsigned int fd,
549 struct compat_old_linux_dirent __user *,
550 unsigned int count);
551 asmlinkage long compat_sys_getdents(unsigned int fd,
552 struct compat_linux_dirent __user *dirent,
553 unsigned int count);
554 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
555 unsigned int nr_segs, unsigned int flags);
556 asmlinkage long compat_sys_open(const char __user *filename, int flags,
557 umode_t mode);
558 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
559 int flags, umode_t mode);
560 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
561 struct file_handle __user *handle,
562 int flags);
563 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
564 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
565 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
566 compat_ulong_t __user *outp,
567 compat_ulong_t __user *exp,
568 struct compat_timespec __user *tsp,
569 void __user *sig);
570 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
571 unsigned int nfds,
572 struct compat_timespec __user *tsp,
573 const compat_sigset_t __user *sigmask,
574 compat_size_t sigsetsize);
575 asmlinkage long compat_sys_signalfd4(int ufd,
576 const compat_sigset_t __user *sigmask,
577 compat_size_t sigsetsize, int flags);
578 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
579 compat_ulong_t __user *nmask,
580 compat_ulong_t maxnode,
581 compat_ulong_t addr,
582 compat_ulong_t flags);
583 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
584 compat_ulong_t maxnode);
585 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
586 compat_ulong_t mode,
587 compat_ulong_t __user *nmask,
588 compat_ulong_t maxnode, compat_ulong_t flags);
589
590 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
591 char __user *optval, unsigned int optlen);
592 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
593 unsigned flags);
594 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
595 unsigned vlen, unsigned int flags);
596 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
597 unsigned int flags);
598 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
599 unsigned flags);
600 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
601 unsigned flags, struct sockaddr __user *addr,
602 int __user *addrlen);
603 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
604 unsigned vlen, unsigned int flags,
605 struct compat_timespec __user *timeout);
606 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
607 struct compat_timespec __user *rmtp);
608 asmlinkage long compat_sys_getitimer(int which,
609 struct compat_itimerval __user *it);
610 asmlinkage long compat_sys_setitimer(int which,
611 struct compat_itimerval __user *in,
612 struct compat_itimerval __user *out);
613 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
614 asmlinkage long compat_sys_setrlimit(unsigned int resource,
615 struct compat_rlimit __user *rlim);
616 asmlinkage long compat_sys_getrlimit(unsigned int resource,
617 struct compat_rlimit __user *rlim);
618 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
619 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
620 unsigned int len,
621 compat_ulong_t __user *user_mask_ptr);
622 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
623 unsigned int len,
624 compat_ulong_t __user *user_mask_ptr);
625 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
626 struct compat_sigevent __user *timer_event_spec,
627 timer_t __user *created_timer_id);
628 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
629 struct compat_itimerspec __user *new,
630 struct compat_itimerspec __user *old);
631 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
632 struct compat_itimerspec __user *setting);
633 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
634 struct compat_timespec __user *tp);
635 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
636 struct compat_timespec __user *tp);
637 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
638 struct compat_timex __user *tp);
639 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
640 struct compat_timespec __user *tp);
641 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
642 struct compat_timespec __user *rqtp,
643 struct compat_timespec __user *rmtp);
644 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
645 struct compat_siginfo __user *uinfo,
646 struct compat_timespec __user *uts, compat_size_t sigsetsize);
647 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
648 compat_size_t sigsetsize);
649 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
650 compat_sigset_t __user *oset,
651 compat_size_t sigsetsize);
652 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
653 compat_size_t sigsetsize);
654 #ifndef CONFIG_ODD_RT_SIGACTION
655 asmlinkage long compat_sys_rt_sigaction(int,
656 const struct compat_sigaction __user *,
657 struct compat_sigaction __user *,
658 compat_size_t);
659 #endif
660 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
661 struct compat_siginfo __user *uinfo);
662 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
663 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
664 compat_ulong_t arg);
665 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
666 struct compat_timespec __user *utime, u32 __user *uaddr2,
667 u32 val3);
668 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
669 char __user *optval, int __user *optlen);
670 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
671 compat_ulong_t nr_segments,
672 struct compat_kexec_segment __user *,
673 compat_ulong_t flags);
674 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
675 const struct compat_mq_attr __user *u_mqstat,
676 struct compat_mq_attr __user *u_omqstat);
677 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
678 const struct compat_sigevent __user *u_notification);
679 asmlinkage long compat_sys_mq_open(const char __user *u_name,
680 int oflag, compat_mode_t mode,
681 struct compat_mq_attr __user *u_attr);
682 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
683 const char __user *u_msg_ptr,
684 compat_size_t msg_len, unsigned int msg_prio,
685 const struct compat_timespec __user *u_abs_timeout);
686 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
687 char __user *u_msg_ptr,
688 compat_size_t msg_len, unsigned int __user *u_msg_prio,
689 const struct compat_timespec __user *u_abs_timeout);
690 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
691 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
692
693 extern ssize_t compat_rw_copy_check_uvector(int type,
694 const struct compat_iovec __user *uvector,
695 unsigned long nr_segs,
696 unsigned long fast_segs, struct iovec *fast_pointer,
697 struct iovec **ret_pointer);
698
699 extern void __user *compat_alloc_user_space(unsigned long len);
700
701 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
702 const struct compat_iovec __user *lvec,
703 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
704 compat_ulong_t riovcnt, compat_ulong_t flags);
705 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
706 const struct compat_iovec __user *lvec,
707 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
708 compat_ulong_t riovcnt, compat_ulong_t flags);
709
710 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
711 compat_off_t __user *offset, compat_size_t count);
712 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
713 compat_loff_t __user *offset, compat_size_t count);
714 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
715 compat_stack_t __user *uoss_ptr);
716
717 #ifdef __ARCH_WANT_SYS_SIGPENDING
718 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
719 #endif
720
721 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
722 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
723 compat_old_sigset_t __user *oset);
724 #endif
725
726 int compat_restore_altstack(const compat_stack_t __user *uss);
727 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
728 #define compat_save_altstack_ex(uss, sp) do { \
729 compat_stack_t __user *__uss = uss; \
730 struct task_struct *t = current; \
731 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
732 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
733 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
734 if (t->sas_ss_flags & SS_AUTODISARM) \
735 sas_ss_reset(t); \
736 } while (0);
737
738 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
739 struct compat_timespec __user *interval);
740
741 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
742 int, const char __user *);
743
744 asmlinkage long compat_sys_arch_prctl(int option, unsigned long arg2);
745
746 /*
747 * For most but not all architectures, "am I in a compat syscall?" and
748 * "am I a compat task?" are the same question. For architectures on which
749 * they aren't the same question, arch code can override in_compat_syscall.
750 */
751
752 #ifndef in_compat_syscall
753 static inline bool in_compat_syscall(void) { return is_compat_task(); }
754 #endif
755
756 /**
757 * ns_to_compat_timeval - Compat version of ns_to_timeval
758 * @nsec: the nanoseconds value to be converted
759 *
760 * Returns the compat_timeval representation of the nsec parameter.
761 */
762 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
763 {
764 struct timeval tv;
765 struct compat_timeval ctv;
766
767 tv = ns_to_timeval(nsec);
768 ctv.tv_sec = tv.tv_sec;
769 ctv.tv_usec = tv.tv_usec;
770
771 return ctv;
772 }
773
774 #else /* !CONFIG_COMPAT */
775
776 #define is_compat_task() (0)
777 static inline bool in_compat_syscall(void) { return false; }
778
779 #endif /* CONFIG_COMPAT */
780
781 #endif /* _LINUX_COMPAT_H */
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