1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_COMPAT_H
3 #define _LINUX_COMPAT_H
4 /*
5 * These are the type definitions for the architecture specific
6 * syscall compatibility layer.
7 */
8
9 #include <linux/types.h>
10
11 #ifdef CONFIG_COMPAT
12
13 #include <linux/stat.h>
14 #include <linux/param.h> /* for HZ */
15 #include <linux/sem.h>
16 #include <linux/socket.h>
17 #include <linux/if.h>
18 #include <linux/fs.h>
19 #include <linux/aio_abi.h> /* for aio_context_t */
20 #include <linux/unistd.h>
21
22 #include <asm/compat.h>
23 #include <asm/siginfo.h>
24 #include <asm/signal.h>
25
26 #ifndef COMPAT_USE_64BIT_TIME
27 #define COMPAT_USE_64BIT_TIME 0
28 #endif
29
30 #ifndef __SC_DELOUSE
31 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
32 #endif
33
34 #define COMPAT_SYSCALL_DEFINE0(name) \
35 asmlinkage long compat_sys_##name(void)
36
37 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
38 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
39 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
40 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
41 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
42 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
43 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
44 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
45 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
46 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
47 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
48 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
49
50 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
51 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))\
52 __attribute__((alias(__stringify(compat_SyS##name)))); \
53 static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
54 asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__));\
55 asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
56 { \
57 return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
58 } \
59 static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
60
61 #ifndef compat_user_stack_pointer
62 #define compat_user_stack_pointer() current_user_stack_pointer()
63 #endif
64 #ifndef compat_sigaltstack /* we'll need that for MIPS */
65 typedef struct compat_sigaltstack {
66 compat_uptr_t ss_sp;
67 int ss_flags;
68 compat_size_t ss_size;
69 } compat_stack_t;
70 #endif
71 #ifndef COMPAT_MINSIGSTKSZ
72 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
73 #endif
74
75 #define compat_jiffies_to_clock_t(x) \
76 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
77
78 typedef __compat_uid32_t compat_uid_t;
79 typedef __compat_gid32_t compat_gid_t;
80
81 typedef compat_ulong_t compat_aio_context_t;
82
83 struct compat_sel_arg_struct;
84 struct rusage;
85
86 struct compat_itimerspec {
87 struct compat_timespec it_interval;
88 struct compat_timespec it_value;
89 };
90
91 struct compat_utimbuf {
92 compat_time_t actime;
93 compat_time_t modtime;
94 };
95
96 struct compat_itimerval {
97 struct compat_timeval it_interval;
98 struct compat_timeval it_value;
99 };
100
101 struct itimerval;
102 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
103 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
104
105 struct compat_tms {
106 compat_clock_t tms_utime;
107 compat_clock_t tms_stime;
108 compat_clock_t tms_cutime;
109 compat_clock_t tms_cstime;
110 };
111
112 struct compat_timex {
113 compat_uint_t modes;
114 compat_long_t offset;
115 compat_long_t freq;
116 compat_long_t maxerror;
117 compat_long_t esterror;
118 compat_int_t status;
119 compat_long_t constant;
120 compat_long_t precision;
121 compat_long_t tolerance;
122 struct compat_timeval time;
123 compat_long_t tick;
124 compat_long_t ppsfreq;
125 compat_long_t jitter;
126 compat_int_t shift;
127 compat_long_t stabil;
128 compat_long_t jitcnt;
129 compat_long_t calcnt;
130 compat_long_t errcnt;
131 compat_long_t stbcnt;
132 compat_int_t tai;
133
134 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
135 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
136 compat_int_t:32; compat_int_t:32; compat_int_t:32;
137 };
138
139 struct timex;
140 int compat_get_timex(struct timex *, const struct compat_timex __user *);
141 int compat_put_timex(struct compat_timex __user *, const struct timex *);
142
143 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
144
145 typedef struct {
146 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
147 } compat_sigset_t;
148
149 struct compat_sigaction {
150 #ifndef __ARCH_HAS_IRIX_SIGACTION
151 compat_uptr_t sa_handler;
152 compat_ulong_t sa_flags;
153 #else
154 compat_uint_t sa_flags;
155 compat_uptr_t sa_handler;
156 #endif
157 #ifdef __ARCH_HAS_SA_RESTORER
158 compat_uptr_t sa_restorer;
159 #endif
160 compat_sigset_t sa_mask __packed;
161 };
162
163 /*
164 * These functions operate on 32- or 64-bit specs depending on
165 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
166 */
167 extern int compat_get_timespec(struct timespec *, const void __user *);
168 extern int compat_put_timespec(const struct timespec *, void __user *);
169 extern int compat_get_timeval(struct timeval *, const void __user *);
170 extern int compat_put_timeval(const struct timeval *, void __user *);
171 extern int compat_get_timespec64(struct timespec64 *, const void __user *);
172 extern int compat_put_timespec64(const struct timespec64 *, void __user *);
173 extern int get_compat_itimerspec64(struct itimerspec64 *its,
174 const struct compat_itimerspec __user *uits);
175 extern int put_compat_itimerspec64(const struct itimerspec64 *its,
176 struct compat_itimerspec __user *uits);
177
178 struct compat_iovec {
179 compat_uptr_t iov_base;
180 compat_size_t iov_len;
181 };
182
183 struct compat_rlimit {
184 compat_ulong_t rlim_cur;
185 compat_ulong_t rlim_max;
186 };
187
188 struct compat_rusage {
189 struct compat_timeval ru_utime;
190 struct compat_timeval ru_stime;
191 compat_long_t ru_maxrss;
192 compat_long_t ru_ixrss;
193 compat_long_t ru_idrss;
194 compat_long_t ru_isrss;
195 compat_long_t ru_minflt;
196 compat_long_t ru_majflt;
197 compat_long_t ru_nswap;
198 compat_long_t ru_inblock;
199 compat_long_t ru_oublock;
200 compat_long_t ru_msgsnd;
201 compat_long_t ru_msgrcv;
202 compat_long_t ru_nsignals;
203 compat_long_t ru_nvcsw;
204 compat_long_t ru_nivcsw;
205 };
206
207 extern int put_compat_rusage(const struct rusage *,
208 struct compat_rusage __user *);
209
210 struct compat_siginfo;
211
212 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
213 struct compat_siginfo __user *, int,
214 struct compat_rusage __user *);
215
216 struct compat_dirent {
217 u32 d_ino;
218 compat_off_t d_off;
219 u16 d_reclen;
220 char d_name[256];
221 };
222
223 struct compat_ustat {
224 compat_daddr_t f_tfree;
225 compat_ino_t f_tinode;
226 char f_fname[6];
227 char f_fpack[6];
228 };
229
230 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
231
232 typedef struct compat_sigevent {
233 compat_sigval_t sigev_value;
234 compat_int_t sigev_signo;
235 compat_int_t sigev_notify;
236 union {
237 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
238 compat_int_t _tid;
239
240 struct {
241 compat_uptr_t _function;
242 compat_uptr_t _attribute;
243 } _sigev_thread;
244 } _sigev_un;
245 } compat_sigevent_t;
246
247 struct compat_ifmap {
248 compat_ulong_t mem_start;
249 compat_ulong_t mem_end;
250 unsigned short base_addr;
251 unsigned char irq;
252 unsigned char dma;
253 unsigned char port;
254 };
255
256 struct compat_if_settings {
257 unsigned int type; /* Type of physical device or protocol */
258 unsigned int size; /* Size of the data allocated by the caller */
259 compat_uptr_t ifs_ifsu; /* union of pointers */
260 };
261
262 struct compat_ifreq {
263 union {
264 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
265 } ifr_ifrn;
266 union {
267 struct sockaddr ifru_addr;
268 struct sockaddr ifru_dstaddr;
269 struct sockaddr ifru_broadaddr;
270 struct sockaddr ifru_netmask;
271 struct sockaddr ifru_hwaddr;
272 short ifru_flags;
273 compat_int_t ifru_ivalue;
274 compat_int_t ifru_mtu;
275 struct compat_ifmap ifru_map;
276 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
277 char ifru_newname[IFNAMSIZ];
278 compat_caddr_t ifru_data;
279 struct compat_if_settings ifru_settings;
280 } ifr_ifru;
281 };
282
283 struct compat_ifconf {
284 compat_int_t ifc_len; /* size of buffer */
285 compat_caddr_t ifcbuf;
286 };
287
288 struct compat_robust_list {
289 compat_uptr_t next;
290 };
291
292 struct compat_robust_list_head {
293 struct compat_robust_list list;
294 compat_long_t futex_offset;
295 compat_uptr_t list_op_pending;
296 };
297
298 #ifdef CONFIG_COMPAT_OLD_SIGACTION
299 struct compat_old_sigaction {
300 compat_uptr_t sa_handler;
301 compat_old_sigset_t sa_mask;
302 compat_ulong_t sa_flags;
303 compat_uptr_t sa_restorer;
304 };
305 #endif
306
307 struct compat_keyctl_kdf_params {
308 compat_uptr_t hashname;
309 compat_uptr_t otherinfo;
310 __u32 otherinfolen;
311 __u32 __spare[8];
312 };
313
314 struct compat_statfs;
315 struct compat_statfs64;
316 struct compat_old_linux_dirent;
317 struct compat_linux_dirent;
318 struct linux_dirent64;
319 struct compat_msghdr;
320 struct compat_mmsghdr;
321 struct compat_sysinfo;
322 struct compat_sysctl_args;
323 struct compat_kexec_segment;
324 struct compat_mq_attr;
325 struct compat_msgbuf;
326
327 asmlinkage long
328 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
329 compat_size_t len);
330 asmlinkage long
331 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
332 compat_size_t __user *len_ptr);
333
334 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
335 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
336 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
337 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
338 compat_ssize_t msgsz, int msgflg);
339 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
340 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
341 long compat_sys_msgctl(int first, int second, void __user *uptr);
342 long compat_sys_shmctl(int first, int second, void __user *uptr);
343 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
344 unsigned nsems, const struct compat_timespec __user *timeout);
345 asmlinkage long compat_sys_keyctl(u32 option,
346 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
347 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
348
349 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
350 const struct compat_iovec __user *vec, compat_ulong_t vlen);
351 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
352 const struct compat_iovec __user *vec, compat_ulong_t vlen);
353 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
354 const struct compat_iovec __user *vec,
355 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
356 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
357 const struct compat_iovec __user *vec,
358 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
359 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
360 const struct compat_iovec __user *vec,
361 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
362 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
363 const struct compat_iovec __user *vec,
364 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
365
366 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
367 asmlinkage long compat_sys_preadv64(unsigned long fd,
368 const struct compat_iovec __user *vec,
369 unsigned long vlen, loff_t pos);
370 #endif
371
372 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
373 asmlinkage long compat_sys_pwritev64(unsigned long fd,
374 const struct compat_iovec __user *vec,
375 unsigned long vlen, loff_t pos);
376 #endif
377
378 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
379 asmlinkage long compat_sys_readv64v2(unsigned long fd,
380 const struct compat_iovec __user *vec,
381 unsigned long vlen, loff_t pos, rwf_t flags);
382 #endif
383
384 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
385 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
386 const struct compat_iovec __user *vec,
387 unsigned long vlen, loff_t pos, rwf_t flags);
388 #endif
389
390 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
391
392 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
393 const compat_uptr_t __user *envp);
394 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
395 const compat_uptr_t __user *argv,
396 const compat_uptr_t __user *envp, int flags);
397
398 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
399 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
400 struct compat_timeval __user *tvp);
401
402 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
403
404 asmlinkage long compat_sys_wait4(compat_pid_t pid,
405 compat_uint_t __user *stat_addr, int options,
406 struct compat_rusage __user *ru);
407
408 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
409
410 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
411
412 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
413 unsigned long bitmap_size);
414 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
415 unsigned long bitmap_size);
416 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
417 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
418 int get_compat_sigevent(struct sigevent *event,
419 const struct compat_sigevent __user *u_event);
420 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
421 struct compat_siginfo __user *uinfo);
422 #ifdef CONFIG_COMPAT_OLD_SIGACTION
423 asmlinkage long compat_sys_sigaction(int sig,
424 const struct compat_old_sigaction __user *act,
425 struct compat_old_sigaction __user *oact);
426 #endif
427
compat_timeval_compare(struct compat_timeval * lhs,struct compat_timeval * rhs)428 static inline int compat_timeval_compare(struct compat_timeval *lhs,
429 struct compat_timeval *rhs)
430 {
431 if (lhs->tv_sec < rhs->tv_sec)
432 return -1;
433 if (lhs->tv_sec > rhs->tv_sec)
434 return 1;
435 return lhs->tv_usec - rhs->tv_usec;
436 }
437
compat_timespec_compare(struct compat_timespec * lhs,struct compat_timespec * rhs)438 static inline int compat_timespec_compare(struct compat_timespec *lhs,
439 struct compat_timespec *rhs)
440 {
441 if (lhs->tv_sec < rhs->tv_sec)
442 return -1;
443 if (lhs->tv_sec > rhs->tv_sec)
444 return 1;
445 return lhs->tv_nsec - rhs->tv_nsec;
446 }
447
448 extern int get_compat_itimerspec(struct itimerspec *dst,
449 const struct compat_itimerspec __user *src);
450 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
451 const struct itimerspec *src);
452
453 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
454 struct timezone __user *tz);
455 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
456 struct timezone __user *tz);
457
458 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
459
460 extern void sigset_from_compat(sigset_t *set, const compat_sigset_t *compat);
461 extern void sigset_to_compat(compat_sigset_t *compat, const sigset_t *set);
462
463 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
464 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
465 const compat_ulong_t __user *new_nodes);
466
467 extern int compat_ptrace_request(struct task_struct *child,
468 compat_long_t request,
469 compat_ulong_t addr, compat_ulong_t data);
470
471 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
472 compat_ulong_t addr, compat_ulong_t data);
473 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
474 compat_long_t addr, compat_long_t data);
475
476 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
477 /*
478 * epoll (fs/eventpoll.c) compat bits follow ...
479 */
480 struct epoll_event; /* fortunately, this one is fixed-layout */
481 asmlinkage long compat_sys_epoll_pwait(int epfd,
482 struct epoll_event __user *events,
483 int maxevents, int timeout,
484 const compat_sigset_t __user *sigmask,
485 compat_size_t sigsetsize);
486
487 asmlinkage long compat_sys_utime(const char __user *filename,
488 struct compat_utimbuf __user *t);
489 asmlinkage long compat_sys_utimensat(unsigned int dfd,
490 const char __user *filename,
491 struct compat_timespec __user *t,
492 int flags);
493
494 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
495 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
496 asmlinkage long compat_sys_signalfd(int ufd,
497 const compat_sigset_t __user *sigmask,
498 compat_size_t sigsetsize);
499 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
500 const struct compat_itimerspec __user *utmr,
501 struct compat_itimerspec __user *otmr);
502 asmlinkage long compat_sys_timerfd_gettime(int ufd,
503 struct compat_itimerspec __user *otmr);
504
505 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
506 __u32 __user *pages,
507 const int __user *nodes,
508 int __user *status,
509 int flags);
510 asmlinkage long compat_sys_futimesat(unsigned int dfd,
511 const char __user *filename,
512 struct compat_timeval __user *t);
513 asmlinkage long compat_sys_utimes(const char __user *filename,
514 struct compat_timeval __user *t);
515 asmlinkage long compat_sys_newstat(const char __user *filename,
516 struct compat_stat __user *statbuf);
517 asmlinkage long compat_sys_newlstat(const char __user *filename,
518 struct compat_stat __user *statbuf);
519 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
520 const char __user *filename,
521 struct compat_stat __user *statbuf,
522 int flag);
523 asmlinkage long compat_sys_newfstat(unsigned int fd,
524 struct compat_stat __user *statbuf);
525 asmlinkage long compat_sys_statfs(const char __user *pathname,
526 struct compat_statfs __user *buf);
527 asmlinkage long compat_sys_fstatfs(unsigned int fd,
528 struct compat_statfs __user *buf);
529 asmlinkage long compat_sys_statfs64(const char __user *pathname,
530 compat_size_t sz,
531 struct compat_statfs64 __user *buf);
532 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
533 struct compat_statfs64 __user *buf);
534 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
535 compat_ulong_t arg);
536 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
537 compat_ulong_t arg);
538 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
539 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
540 compat_long_t min_nr,
541 compat_long_t nr,
542 struct io_event __user *events,
543 struct compat_timespec __user *timeout);
544 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
545 u32 __user *iocb);
546 asmlinkage long compat_sys_mount(const char __user *dev_name,
547 const char __user *dir_name,
548 const char __user *type, compat_ulong_t flags,
549 const void __user *data);
550 asmlinkage long compat_sys_old_readdir(unsigned int fd,
551 struct compat_old_linux_dirent __user *,
552 unsigned int count);
553 asmlinkage long compat_sys_getdents(unsigned int fd,
554 struct compat_linux_dirent __user *dirent,
555 unsigned int count);
556 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
557 unsigned int nr_segs, unsigned int flags);
558 asmlinkage long compat_sys_open(const char __user *filename, int flags,
559 umode_t mode);
560 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
561 int flags, umode_t mode);
562 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
563 struct file_handle __user *handle,
564 int flags);
565 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
566 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
567 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
568 compat_ulong_t __user *outp,
569 compat_ulong_t __user *exp,
570 struct compat_timespec __user *tsp,
571 void __user *sig);
572 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
573 unsigned int nfds,
574 struct compat_timespec __user *tsp,
575 const compat_sigset_t __user *sigmask,
576 compat_size_t sigsetsize);
577 asmlinkage long compat_sys_signalfd4(int ufd,
578 const compat_sigset_t __user *sigmask,
579 compat_size_t sigsetsize, int flags);
580 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
581 compat_ulong_t __user *nmask,
582 compat_ulong_t maxnode,
583 compat_ulong_t addr,
584 compat_ulong_t flags);
585 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
586 compat_ulong_t maxnode);
587 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
588 compat_ulong_t mode,
589 compat_ulong_t __user *nmask,
590 compat_ulong_t maxnode, compat_ulong_t flags);
591
592 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
593 char __user *optval, unsigned int optlen);
594 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
595 unsigned flags);
596 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
597 unsigned vlen, unsigned int flags);
598 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
599 unsigned int flags);
600 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
601 unsigned flags);
602 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
603 unsigned flags, struct sockaddr __user *addr,
604 int __user *addrlen);
605 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
606 unsigned vlen, unsigned int flags,
607 struct compat_timespec __user *timeout);
608 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
609 struct compat_timespec __user *rmtp);
610 asmlinkage long compat_sys_getitimer(int which,
611 struct compat_itimerval __user *it);
612 asmlinkage long compat_sys_setitimer(int which,
613 struct compat_itimerval __user *in,
614 struct compat_itimerval __user *out);
615 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
616 asmlinkage long compat_sys_setrlimit(unsigned int resource,
617 struct compat_rlimit __user *rlim);
618 asmlinkage long compat_sys_getrlimit(unsigned int resource,
619 struct compat_rlimit __user *rlim);
620 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
621 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
622 unsigned int len,
623 compat_ulong_t __user *user_mask_ptr);
624 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
625 unsigned int len,
626 compat_ulong_t __user *user_mask_ptr);
627 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
628 struct compat_sigevent __user *timer_event_spec,
629 timer_t __user *created_timer_id);
630 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
631 struct compat_itimerspec __user *new,
632 struct compat_itimerspec __user *old);
633 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
634 struct compat_itimerspec __user *setting);
635 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
636 struct compat_timespec __user *tp);
637 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
638 struct compat_timespec __user *tp);
639 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
640 struct compat_timex __user *tp);
641 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
642 struct compat_timespec __user *tp);
643 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
644 struct compat_timespec __user *rqtp,
645 struct compat_timespec __user *rmtp);
646 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
647 struct compat_siginfo __user *uinfo,
648 struct compat_timespec __user *uts, compat_size_t sigsetsize);
649 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
650 compat_size_t sigsetsize);
651 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
652 compat_sigset_t __user *oset,
653 compat_size_t sigsetsize);
654 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
655 compat_size_t sigsetsize);
656 #ifndef CONFIG_ODD_RT_SIGACTION
657 asmlinkage long compat_sys_rt_sigaction(int,
658 const struct compat_sigaction __user *,
659 struct compat_sigaction __user *,
660 compat_size_t);
661 #endif
662 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
663 struct compat_siginfo __user *uinfo);
664 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
665 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
666 compat_ulong_t arg);
667 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
668 struct compat_timespec __user *utime, u32 __user *uaddr2,
669 u32 val3);
670 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
671 char __user *optval, int __user *optlen);
672 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
673 compat_ulong_t nr_segments,
674 struct compat_kexec_segment __user *,
675 compat_ulong_t flags);
676 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
677 const struct compat_mq_attr __user *u_mqstat,
678 struct compat_mq_attr __user *u_omqstat);
679 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
680 const struct compat_sigevent __user *u_notification);
681 asmlinkage long compat_sys_mq_open(const char __user *u_name,
682 int oflag, compat_mode_t mode,
683 struct compat_mq_attr __user *u_attr);
684 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
685 const char __user *u_msg_ptr,
686 compat_size_t msg_len, unsigned int msg_prio,
687 const struct compat_timespec __user *u_abs_timeout);
688 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
689 char __user *u_msg_ptr,
690 compat_size_t msg_len, unsigned int __user *u_msg_prio,
691 const struct compat_timespec __user *u_abs_timeout);
692 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
693 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
694
695 extern ssize_t compat_rw_copy_check_uvector(int type,
696 const struct compat_iovec __user *uvector,
697 unsigned long nr_segs,
698 unsigned long fast_segs, struct iovec *fast_pointer,
699 struct iovec **ret_pointer);
700
701 extern void __user *compat_alloc_user_space(unsigned long len);
702
703 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
704 const struct compat_iovec __user *lvec,
705 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
706 compat_ulong_t riovcnt, compat_ulong_t flags);
707 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
708 const struct compat_iovec __user *lvec,
709 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
710 compat_ulong_t riovcnt, compat_ulong_t flags);
711
712 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
713 compat_off_t __user *offset, compat_size_t count);
714 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
715 compat_loff_t __user *offset, compat_size_t count);
716 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
717 compat_stack_t __user *uoss_ptr);
718
719 #ifdef __ARCH_WANT_SYS_SIGPENDING
720 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
721 #endif
722
723 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
724 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
725 compat_old_sigset_t __user *oset);
726 #endif
727
728 int compat_restore_altstack(const compat_stack_t __user *uss);
729 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
730 #define compat_save_altstack_ex(uss, sp) do { \
731 compat_stack_t __user *__uss = uss; \
732 struct task_struct *t = current; \
733 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
734 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
735 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
736 if (t->sas_ss_flags & SS_AUTODISARM) \
737 sas_ss_reset(t); \
738 } while (0);
739
740 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
741 struct compat_timespec __user *interval);
742
743 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
744 int, const char __user *);
745
746 asmlinkage long compat_sys_arch_prctl(int option, unsigned long arg2);
747
748 /*
749 * For most but not all architectures, "am I in a compat syscall?" and
750 * "am I a compat task?" are the same question. For architectures on which
751 * they aren't the same question, arch code can override in_compat_syscall.
752 */
753
754 #ifndef in_compat_syscall
in_compat_syscall(void)755 static inline bool in_compat_syscall(void) { return is_compat_task(); }
756 #endif
757
758 /**
759 * ns_to_compat_timeval - Compat version of ns_to_timeval
760 * @nsec: the nanoseconds value to be converted
761 *
762 * Returns the compat_timeval representation of the nsec parameter.
763 */
ns_to_compat_timeval(s64 nsec)764 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
765 {
766 struct timeval tv;
767 struct compat_timeval ctv;
768
769 tv = ns_to_timeval(nsec);
770 ctv.tv_sec = tv.tv_sec;
771 ctv.tv_usec = tv.tv_usec;
772
773 return ctv;
774 }
775
776 #else /* !CONFIG_COMPAT */
777
778 #define is_compat_task() (0)
in_compat_syscall(void)779 static inline bool in_compat_syscall(void) { return false; }
780
781 #endif /* CONFIG_COMPAT */
782
783 #endif /* _LINUX_COMPAT_H */
784