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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[thirdparty/kernel/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
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/uaccess.h>
21 #include <linux/unistd.h>
22
23 #include <asm/compat.h>
24 #include <asm/siginfo.h>
25 #include <asm/signal.h>
26
27 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
28 /*
29 * It may be useful for an architecture to override the definitions of the
30 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
31 * to use a different calling convention for syscalls. To allow for that,
32 + the prototypes for the compat_sys_*() functions below will *not* be included
33 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
34 */
35 #include <asm/syscall_wrapper.h>
36 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
37
38 #ifndef COMPAT_USE_64BIT_TIME
39 #define COMPAT_USE_64BIT_TIME 0
40 #endif
41
42 #ifndef __SC_DELOUSE
43 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
44 #endif
45
46 #ifndef COMPAT_SYSCALL_DEFINE0
47 #define COMPAT_SYSCALL_DEFINE0(name) \
48 asmlinkage long compat_sys_##name(void); \
49 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
50 asmlinkage long compat_sys_##name(void)
51 #endif /* COMPAT_SYSCALL_DEFINE0 */
52
53 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
54 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
55 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
56 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
57 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
58 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
59 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
60 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
61 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
62 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
63 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
64 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
65
66 /*
67 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
68 * sign-extends 32-bit ints to longs whenever needed. The actual work is
69 * done within __do_compat_sys_*().
70 */
71 #ifndef COMPAT_SYSCALL_DEFINEx
72 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
73 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
74 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
75 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
76 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
77 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
78 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
79 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
80 { \
81 return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
82 } \
83 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
84 #endif /* COMPAT_SYSCALL_DEFINEx */
85
86 #ifndef compat_user_stack_pointer
87 #define compat_user_stack_pointer() current_user_stack_pointer()
88 #endif
89 #ifndef compat_sigaltstack /* we'll need that for MIPS */
90 typedef struct compat_sigaltstack {
91 compat_uptr_t ss_sp;
92 int ss_flags;
93 compat_size_t ss_size;
94 } compat_stack_t;
95 #endif
96
97 #define compat_jiffies_to_clock_t(x) \
98 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
99
100 typedef __compat_uid32_t compat_uid_t;
101 typedef __compat_gid32_t compat_gid_t;
102
103 typedef compat_ulong_t compat_aio_context_t;
104
105 struct compat_sel_arg_struct;
106 struct rusage;
107
108 struct compat_itimerspec {
109 struct compat_timespec it_interval;
110 struct compat_timespec it_value;
111 };
112
113 struct compat_utimbuf {
114 compat_time_t actime;
115 compat_time_t modtime;
116 };
117
118 struct compat_itimerval {
119 struct compat_timeval it_interval;
120 struct compat_timeval it_value;
121 };
122
123 struct itimerval;
124 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
125 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
126
127 struct compat_tms {
128 compat_clock_t tms_utime;
129 compat_clock_t tms_stime;
130 compat_clock_t tms_cutime;
131 compat_clock_t tms_cstime;
132 };
133
134 struct compat_timex {
135 compat_uint_t modes;
136 compat_long_t offset;
137 compat_long_t freq;
138 compat_long_t maxerror;
139 compat_long_t esterror;
140 compat_int_t status;
141 compat_long_t constant;
142 compat_long_t precision;
143 compat_long_t tolerance;
144 struct compat_timeval time;
145 compat_long_t tick;
146 compat_long_t ppsfreq;
147 compat_long_t jitter;
148 compat_int_t shift;
149 compat_long_t stabil;
150 compat_long_t jitcnt;
151 compat_long_t calcnt;
152 compat_long_t errcnt;
153 compat_long_t stbcnt;
154 compat_int_t tai;
155
156 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
157 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
158 compat_int_t:32; compat_int_t:32; compat_int_t:32;
159 };
160
161 struct timex;
162 int compat_get_timex(struct timex *, const struct compat_timex __user *);
163 int compat_put_timex(struct compat_timex __user *, const struct timex *);
164
165 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
166
167 typedef struct {
168 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
169 } compat_sigset_t;
170
171 struct compat_sigaction {
172 #ifndef __ARCH_HAS_IRIX_SIGACTION
173 compat_uptr_t sa_handler;
174 compat_ulong_t sa_flags;
175 #else
176 compat_uint_t sa_flags;
177 compat_uptr_t sa_handler;
178 #endif
179 #ifdef __ARCH_HAS_SA_RESTORER
180 compat_uptr_t sa_restorer;
181 #endif
182 compat_sigset_t sa_mask __packed;
183 };
184
185 typedef union compat_sigval {
186 compat_int_t sival_int;
187 compat_uptr_t sival_ptr;
188 } compat_sigval_t;
189
190 typedef struct compat_siginfo {
191 int si_signo;
192 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
193 int si_errno;
194 int si_code;
195 #else
196 int si_code;
197 int si_errno;
198 #endif
199
200 union {
201 int _pad[128/sizeof(int) - 3];
202
203 /* kill() */
204 struct {
205 compat_pid_t _pid; /* sender's pid */
206 __compat_uid32_t _uid; /* sender's uid */
207 } _kill;
208
209 /* POSIX.1b timers */
210 struct {
211 compat_timer_t _tid; /* timer id */
212 int _overrun; /* overrun count */
213 compat_sigval_t _sigval; /* same as below */
214 } _timer;
215
216 /* POSIX.1b signals */
217 struct {
218 compat_pid_t _pid; /* sender's pid */
219 __compat_uid32_t _uid; /* sender's uid */
220 compat_sigval_t _sigval;
221 } _rt;
222
223 /* SIGCHLD */
224 struct {
225 compat_pid_t _pid; /* which child */
226 __compat_uid32_t _uid; /* sender's uid */
227 int _status; /* exit code */
228 compat_clock_t _utime;
229 compat_clock_t _stime;
230 } _sigchld;
231
232 #ifdef CONFIG_X86_X32_ABI
233 /* SIGCHLD (x32 version) */
234 struct {
235 compat_pid_t _pid; /* which child */
236 __compat_uid32_t _uid; /* sender's uid */
237 int _status; /* exit code */
238 compat_s64 _utime;
239 compat_s64 _stime;
240 } _sigchld_x32;
241 #endif
242
243 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
244 struct {
245 compat_uptr_t _addr; /* faulting insn/memory ref. */
246 #ifdef __ARCH_SI_TRAPNO
247 int _trapno; /* TRAP # which caused the signal */
248 #endif
249 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
250 sizeof(short) : __alignof__(compat_uptr_t))
251 union {
252 /*
253 * used when si_code=BUS_MCEERR_AR or
254 * used when si_code=BUS_MCEERR_AO
255 */
256 short int _addr_lsb; /* Valid LSB of the reported address. */
257 /* used when si_code=SEGV_BNDERR */
258 struct {
259 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
260 compat_uptr_t _lower;
261 compat_uptr_t _upper;
262 } _addr_bnd;
263 /* used when si_code=SEGV_PKUERR */
264 struct {
265 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
266 u32 _pkey;
267 } _addr_pkey;
268 };
269 } _sigfault;
270
271 /* SIGPOLL */
272 struct {
273 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
274 int _fd;
275 } _sigpoll;
276
277 struct {
278 compat_uptr_t _call_addr; /* calling user insn */
279 int _syscall; /* triggering system call number */
280 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
281 } _sigsys;
282 } _sifields;
283 } compat_siginfo_t;
284
285 /*
286 * These functions operate on 32- or 64-bit specs depending on
287 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
288 */
289 extern int compat_get_timespec(struct timespec *, const void __user *);
290 extern int compat_put_timespec(const struct timespec *, void __user *);
291 extern int compat_get_timeval(struct timeval *, const void __user *);
292 extern int compat_put_timeval(const struct timeval *, void __user *);
293 extern int compat_get_timespec64(struct timespec64 *, const void __user *);
294 extern int compat_put_timespec64(const struct timespec64 *, void __user *);
295 extern int get_compat_itimerspec64(struct itimerspec64 *its,
296 const struct compat_itimerspec __user *uits);
297 extern int put_compat_itimerspec64(const struct itimerspec64 *its,
298 struct compat_itimerspec __user *uits);
299
300 struct compat_iovec {
301 compat_uptr_t iov_base;
302 compat_size_t iov_len;
303 };
304
305 struct compat_rlimit {
306 compat_ulong_t rlim_cur;
307 compat_ulong_t rlim_max;
308 };
309
310 struct compat_rusage {
311 struct compat_timeval ru_utime;
312 struct compat_timeval ru_stime;
313 compat_long_t ru_maxrss;
314 compat_long_t ru_ixrss;
315 compat_long_t ru_idrss;
316 compat_long_t ru_isrss;
317 compat_long_t ru_minflt;
318 compat_long_t ru_majflt;
319 compat_long_t ru_nswap;
320 compat_long_t ru_inblock;
321 compat_long_t ru_oublock;
322 compat_long_t ru_msgsnd;
323 compat_long_t ru_msgrcv;
324 compat_long_t ru_nsignals;
325 compat_long_t ru_nvcsw;
326 compat_long_t ru_nivcsw;
327 };
328
329 extern int put_compat_rusage(const struct rusage *,
330 struct compat_rusage __user *);
331
332 struct compat_siginfo;
333
334 struct compat_dirent {
335 u32 d_ino;
336 compat_off_t d_off;
337 u16 d_reclen;
338 char d_name[256];
339 };
340
341 struct compat_ustat {
342 compat_daddr_t f_tfree;
343 compat_ino_t f_tinode;
344 char f_fname[6];
345 char f_fpack[6];
346 };
347
348 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
349
350 typedef struct compat_sigevent {
351 compat_sigval_t sigev_value;
352 compat_int_t sigev_signo;
353 compat_int_t sigev_notify;
354 union {
355 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
356 compat_int_t _tid;
357
358 struct {
359 compat_uptr_t _function;
360 compat_uptr_t _attribute;
361 } _sigev_thread;
362 } _sigev_un;
363 } compat_sigevent_t;
364
365 struct compat_ifmap {
366 compat_ulong_t mem_start;
367 compat_ulong_t mem_end;
368 unsigned short base_addr;
369 unsigned char irq;
370 unsigned char dma;
371 unsigned char port;
372 };
373
374 struct compat_if_settings {
375 unsigned int type; /* Type of physical device or protocol */
376 unsigned int size; /* Size of the data allocated by the caller */
377 compat_uptr_t ifs_ifsu; /* union of pointers */
378 };
379
380 struct compat_ifreq {
381 union {
382 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
383 } ifr_ifrn;
384 union {
385 struct sockaddr ifru_addr;
386 struct sockaddr ifru_dstaddr;
387 struct sockaddr ifru_broadaddr;
388 struct sockaddr ifru_netmask;
389 struct sockaddr ifru_hwaddr;
390 short ifru_flags;
391 compat_int_t ifru_ivalue;
392 compat_int_t ifru_mtu;
393 struct compat_ifmap ifru_map;
394 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
395 char ifru_newname[IFNAMSIZ];
396 compat_caddr_t ifru_data;
397 struct compat_if_settings ifru_settings;
398 } ifr_ifru;
399 };
400
401 struct compat_ifconf {
402 compat_int_t ifc_len; /* size of buffer */
403 compat_caddr_t ifcbuf;
404 };
405
406 struct compat_robust_list {
407 compat_uptr_t next;
408 };
409
410 struct compat_robust_list_head {
411 struct compat_robust_list list;
412 compat_long_t futex_offset;
413 compat_uptr_t list_op_pending;
414 };
415
416 #ifdef CONFIG_COMPAT_OLD_SIGACTION
417 struct compat_old_sigaction {
418 compat_uptr_t sa_handler;
419 compat_old_sigset_t sa_mask;
420 compat_ulong_t sa_flags;
421 compat_uptr_t sa_restorer;
422 };
423 #endif
424
425 struct compat_keyctl_kdf_params {
426 compat_uptr_t hashname;
427 compat_uptr_t otherinfo;
428 __u32 otherinfolen;
429 __u32 __spare[8];
430 };
431
432 struct compat_statfs;
433 struct compat_statfs64;
434 struct compat_old_linux_dirent;
435 struct compat_linux_dirent;
436 struct linux_dirent64;
437 struct compat_msghdr;
438 struct compat_mmsghdr;
439 struct compat_sysinfo;
440 struct compat_sysctl_args;
441 struct compat_kexec_segment;
442 struct compat_mq_attr;
443 struct compat_msgbuf;
444
445 extern void compat_exit_robust_list(struct task_struct *curr);
446
447 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
448
449 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
450
451 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
452 unsigned long bitmap_size);
453 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
454 unsigned long bitmap_size);
455 int copy_siginfo_from_user32(siginfo_t *to, const struct compat_siginfo __user *from);
456 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
457 int get_compat_sigevent(struct sigevent *event,
458 const struct compat_sigevent __user *u_event);
459
460 static inline int compat_timeval_compare(struct compat_timeval *lhs,
461 struct compat_timeval *rhs)
462 {
463 if (lhs->tv_sec < rhs->tv_sec)
464 return -1;
465 if (lhs->tv_sec > rhs->tv_sec)
466 return 1;
467 return lhs->tv_usec - rhs->tv_usec;
468 }
469
470 static inline int compat_timespec_compare(struct compat_timespec *lhs,
471 struct compat_timespec *rhs)
472 {
473 if (lhs->tv_sec < rhs->tv_sec)
474 return -1;
475 if (lhs->tv_sec > rhs->tv_sec)
476 return 1;
477 return lhs->tv_nsec - rhs->tv_nsec;
478 }
479
480 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
481
482 /*
483 * Defined inline such that size can be compile time constant, which avoids
484 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
485 */
486 static inline int
487 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
488 unsigned int size)
489 {
490 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
491 #ifdef __BIG_ENDIAN
492 compat_sigset_t v;
493 switch (_NSIG_WORDS) {
494 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
495 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
496 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
497 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
498 }
499 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
500 #else
501 return copy_to_user(compat, set, size) ? -EFAULT : 0;
502 #endif
503 }
504
505 extern int compat_ptrace_request(struct task_struct *child,
506 compat_long_t request,
507 compat_ulong_t addr, compat_ulong_t data);
508
509 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
510 compat_ulong_t addr, compat_ulong_t data);
511
512 struct epoll_event; /* fortunately, this one is fixed-layout */
513
514 extern ssize_t compat_rw_copy_check_uvector(int type,
515 const struct compat_iovec __user *uvector,
516 unsigned long nr_segs,
517 unsigned long fast_segs, struct iovec *fast_pointer,
518 struct iovec **ret_pointer);
519
520 extern void __user *compat_alloc_user_space(unsigned long len);
521
522 int compat_restore_altstack(const compat_stack_t __user *uss);
523 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
524 #define compat_save_altstack_ex(uss, sp) do { \
525 compat_stack_t __user *__uss = uss; \
526 struct task_struct *t = current; \
527 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
528 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
529 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
530 if (t->sas_ss_flags & SS_AUTODISARM) \
531 sas_ss_reset(t); \
532 } while (0);
533
534 /*
535 * These syscall function prototypes are kept in the same order as
536 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
537 * go below.
538 *
539 * Please note that these prototypes here are only provided for information
540 * purposes, for static analysis, and for linking from the syscall table.
541 * These functions should not be called elsewhere from kernel code.
542 *
543 * As the syscall calling convention may be different from the default
544 * for architectures overriding the syscall calling convention, do not
545 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
546 */
547 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
548 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
549 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
550 u32 __user *iocb);
551 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
552 compat_long_t min_nr,
553 compat_long_t nr,
554 struct io_event __user *events,
555 struct compat_timespec __user *timeout);
556
557 /* fs/cookies.c */
558 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
559
560 /* fs/eventpoll.c */
561 asmlinkage long compat_sys_epoll_pwait(int epfd,
562 struct epoll_event __user *events,
563 int maxevents, int timeout,
564 const compat_sigset_t __user *sigmask,
565 compat_size_t sigsetsize);
566
567 /* fs/fcntl.c */
568 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
569 compat_ulong_t arg);
570 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
571 compat_ulong_t arg);
572
573 /* fs/ioctl.c */
574 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
575 compat_ulong_t arg);
576
577 /* fs/namespace.c */
578 asmlinkage long compat_sys_mount(const char __user *dev_name,
579 const char __user *dir_name,
580 const char __user *type, compat_ulong_t flags,
581 const void __user *data);
582
583 /* fs/open.c */
584 asmlinkage long compat_sys_statfs(const char __user *pathname,
585 struct compat_statfs __user *buf);
586 asmlinkage long compat_sys_statfs64(const char __user *pathname,
587 compat_size_t sz,
588 struct compat_statfs64 __user *buf);
589 asmlinkage long compat_sys_fstatfs(unsigned int fd,
590 struct compat_statfs __user *buf);
591 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
592 struct compat_statfs64 __user *buf);
593 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
594 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
595 /* No generic prototype for truncate64, ftruncate64, fallocate */
596 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
597 int flags, umode_t mode);
598
599 /* fs/readdir.c */
600 asmlinkage long compat_sys_getdents(unsigned int fd,
601 struct compat_linux_dirent __user *dirent,
602 unsigned int count);
603
604 /* fs/read_write.c */
605 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
606 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
607 const struct compat_iovec __user *vec, compat_ulong_t vlen);
608 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
609 const struct compat_iovec __user *vec, compat_ulong_t vlen);
610 /* No generic prototype for pread64 and pwrite64 */
611 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
612 const struct compat_iovec __user *vec,
613 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
614 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
615 const struct compat_iovec __user *vec,
616 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
617 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
618 asmlinkage long compat_sys_preadv64(unsigned long fd,
619 const struct compat_iovec __user *vec,
620 unsigned long vlen, loff_t pos);
621 #endif
622
623 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
624 asmlinkage long compat_sys_pwritev64(unsigned long fd,
625 const struct compat_iovec __user *vec,
626 unsigned long vlen, loff_t pos);
627 #endif
628
629 /* fs/sendfile.c */
630 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
631 compat_off_t __user *offset, compat_size_t count);
632 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
633 compat_loff_t __user *offset, compat_size_t count);
634
635 /* fs/select.c */
636 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
637 compat_ulong_t __user *outp,
638 compat_ulong_t __user *exp,
639 struct compat_timespec __user *tsp,
640 void __user *sig);
641 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
642 unsigned int nfds,
643 struct compat_timespec __user *tsp,
644 const compat_sigset_t __user *sigmask,
645 compat_size_t sigsetsize);
646
647 /* fs/signalfd.c */
648 asmlinkage long compat_sys_signalfd4(int ufd,
649 const compat_sigset_t __user *sigmask,
650 compat_size_t sigsetsize, int flags);
651
652 /* fs/splice.c */
653 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
654 unsigned int nr_segs, unsigned int flags);
655
656 /* fs/stat.c */
657 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
658 const char __user *filename,
659 struct compat_stat __user *statbuf,
660 int flag);
661 asmlinkage long compat_sys_newfstat(unsigned int fd,
662 struct compat_stat __user *statbuf);
663
664 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
665
666 /* fs/timerfd.c */
667 asmlinkage long compat_sys_timerfd_gettime(int ufd,
668 struct compat_itimerspec __user *otmr);
669 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
670 const struct compat_itimerspec __user *utmr,
671 struct compat_itimerspec __user *otmr);
672
673 /* fs/utimes.c */
674 asmlinkage long compat_sys_utimensat(unsigned int dfd,
675 const char __user *filename,
676 struct compat_timespec __user *t,
677 int flags);
678
679 /* kernel/exit.c */
680 asmlinkage long compat_sys_waitid(int, compat_pid_t,
681 struct compat_siginfo __user *, int,
682 struct compat_rusage __user *);
683
684
685
686 /* kernel/futex.c */
687 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
688 struct compat_timespec __user *utime, u32 __user *uaddr2,
689 u32 val3);
690 asmlinkage long
691 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
692 compat_size_t len);
693 asmlinkage long
694 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
695 compat_size_t __user *len_ptr);
696
697 /* kernel/hrtimer.c */
698 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
699 struct compat_timespec __user *rmtp);
700
701 /* kernel/itimer.c */
702 asmlinkage long compat_sys_getitimer(int which,
703 struct compat_itimerval __user *it);
704 asmlinkage long compat_sys_setitimer(int which,
705 struct compat_itimerval __user *in,
706 struct compat_itimerval __user *out);
707
708 /* kernel/kexec.c */
709 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
710 compat_ulong_t nr_segments,
711 struct compat_kexec_segment __user *,
712 compat_ulong_t flags);
713
714 /* kernel/posix-timers.c */
715 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
716 struct compat_sigevent __user *timer_event_spec,
717 timer_t __user *created_timer_id);
718 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
719 struct compat_itimerspec __user *setting);
720 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
721 struct compat_itimerspec __user *new,
722 struct compat_itimerspec __user *old);
723 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
724 struct compat_timespec __user *tp);
725 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
726 struct compat_timespec __user *tp);
727 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
728 struct compat_timespec __user *tp);
729 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
730 struct compat_timespec __user *rqtp,
731 struct compat_timespec __user *rmtp);
732
733 /* kernel/ptrace.c */
734 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
735 compat_long_t addr, compat_long_t data);
736
737 /* kernel/sched/core.c */
738 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
739 unsigned int len,
740 compat_ulong_t __user *user_mask_ptr);
741 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
742 unsigned int len,
743 compat_ulong_t __user *user_mask_ptr);
744 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
745 struct compat_timespec __user *interval);
746
747 /* kernel/signal.c */
748 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
749 compat_stack_t __user *uoss_ptr);
750 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
751 compat_size_t sigsetsize);
752 #ifndef CONFIG_ODD_RT_SIGACTION
753 asmlinkage long compat_sys_rt_sigaction(int,
754 const struct compat_sigaction __user *,
755 struct compat_sigaction __user *,
756 compat_size_t);
757 #endif
758 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
759 compat_sigset_t __user *oset,
760 compat_size_t sigsetsize);
761 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
762 compat_size_t sigsetsize);
763 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
764 struct compat_siginfo __user *uinfo,
765 struct compat_timespec __user *uts, compat_size_t sigsetsize);
766 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
767 struct compat_siginfo __user *uinfo);
768 /* No generic prototype for rt_sigreturn */
769
770 /* kernel/sys.c */
771 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
772 asmlinkage long compat_sys_getrlimit(unsigned int resource,
773 struct compat_rlimit __user *rlim);
774 asmlinkage long compat_sys_setrlimit(unsigned int resource,
775 struct compat_rlimit __user *rlim);
776 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
777
778 /* kernel/time.c */
779 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
780 struct timezone __user *tz);
781 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
782 struct timezone __user *tz);
783 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
784
785 /* kernel/timer.c */
786 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
787
788 /* ipc/mqueue.c */
789 asmlinkage long compat_sys_mq_open(const char __user *u_name,
790 int oflag, compat_mode_t mode,
791 struct compat_mq_attr __user *u_attr);
792 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
793 const char __user *u_msg_ptr,
794 compat_size_t msg_len, unsigned int msg_prio,
795 const struct compat_timespec __user *u_abs_timeout);
796 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
797 char __user *u_msg_ptr,
798 compat_size_t msg_len, unsigned int __user *u_msg_prio,
799 const struct compat_timespec __user *u_abs_timeout);
800 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
801 const struct compat_sigevent __user *u_notification);
802 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
803 const struct compat_mq_attr __user *u_mqstat,
804 struct compat_mq_attr __user *u_omqstat);
805
806 /* ipc/msg.c */
807 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
808 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
809 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
810 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
811 compat_ssize_t msgsz, int msgflg);
812
813 /* ipc/sem.c */
814 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
815 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
816 unsigned nsems, const struct compat_timespec __user *timeout);
817
818 /* ipc/shm.c */
819 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
820 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
821
822 /* net/socket.c */
823 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
824 unsigned flags, struct sockaddr __user *addr,
825 int __user *addrlen);
826 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
827 char __user *optval, unsigned int optlen);
828 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
829 char __user *optval, int __user *optlen);
830 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
831 unsigned flags);
832 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
833 unsigned int flags);
834
835 /* mm/filemap.c: No generic prototype for readahead */
836
837 /* security/keys/keyctl.c */
838 asmlinkage long compat_sys_keyctl(u32 option,
839 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
840
841 /* arch/example/kernel/sys_example.c */
842 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
843 const compat_uptr_t __user *envp);
844
845 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
846
847 /* mm/, CONFIG_MMU only */
848 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
849 compat_ulong_t mode,
850 compat_ulong_t __user *nmask,
851 compat_ulong_t maxnode, compat_ulong_t flags);
852 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
853 compat_ulong_t __user *nmask,
854 compat_ulong_t maxnode,
855 compat_ulong_t addr,
856 compat_ulong_t flags);
857 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
858 compat_ulong_t maxnode);
859 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
860 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
861 const compat_ulong_t __user *new_nodes);
862 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
863 __u32 __user *pages,
864 const int __user *nodes,
865 int __user *status,
866 int flags);
867
868 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
869 compat_pid_t pid, int sig,
870 struct compat_siginfo __user *uinfo);
871 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
872 unsigned vlen, unsigned int flags,
873 struct compat_timespec __user *timeout);
874 asmlinkage long compat_sys_wait4(compat_pid_t pid,
875 compat_uint_t __user *stat_addr, int options,
876 struct compat_rusage __user *ru);
877 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
878 int, const char __user *);
879 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
880 struct file_handle __user *handle,
881 int flags);
882 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
883 struct compat_timex __user *tp);
884 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
885 unsigned vlen, unsigned int flags);
886 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
887 const struct compat_iovec __user *lvec,
888 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
889 compat_ulong_t riovcnt, compat_ulong_t flags);
890 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
891 const struct compat_iovec __user *lvec,
892 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
893 compat_ulong_t riovcnt, compat_ulong_t flags);
894 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
895 const compat_uptr_t __user *argv,
896 const compat_uptr_t __user *envp, int flags);
897 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
898 const struct compat_iovec __user *vec,
899 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
900 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
901 const struct compat_iovec __user *vec,
902 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
903 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
904 asmlinkage long compat_sys_readv64v2(unsigned long fd,
905 const struct compat_iovec __user *vec,
906 unsigned long vlen, loff_t pos, rwf_t flags);
907 #endif
908
909 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
910 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
911 const struct compat_iovec __user *vec,
912 unsigned long vlen, loff_t pos, rwf_t flags);
913 #endif
914
915
916 /*
917 * Deprecated system calls which are still defined in
918 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
919 */
920
921 /* __ARCH_WANT_SYSCALL_NO_AT */
922 asmlinkage long compat_sys_open(const char __user *filename, int flags,
923 umode_t mode);
924 asmlinkage long compat_sys_utimes(const char __user *filename,
925 struct compat_timeval __user *t);
926
927 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
928 asmlinkage long compat_sys_signalfd(int ufd,
929 const compat_sigset_t __user *sigmask,
930 compat_size_t sigsetsize);
931
932 /* __ARCH_WANT_SYSCALL_OFF_T */
933 asmlinkage long compat_sys_newstat(const char __user *filename,
934 struct compat_stat __user *statbuf);
935 asmlinkage long compat_sys_newlstat(const char __user *filename,
936 struct compat_stat __user *statbuf);
937
938 /* __ARCH_WANT_SYSCALL_DEPRECATED */
939 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
940 asmlinkage long compat_sys_utime(const char __user *filename,
941 struct compat_utimbuf __user *t);
942 asmlinkage long compat_sys_futimesat(unsigned int dfd,
943 const char __user *filename,
944 struct compat_timeval __user *t);
945 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
946 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
947 struct compat_timeval __user *tvp);
948 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
949 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
950 unsigned flags);
951 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
952
953 /* obsolete: fs/readdir.c */
954 asmlinkage long compat_sys_old_readdir(unsigned int fd,
955 struct compat_old_linux_dirent __user *,
956 unsigned int count);
957
958 /* obsolete: fs/select.c */
959 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
960
961 /* obsolete: ipc */
962 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
963
964 /* obsolete: kernel/signal.c */
965 #ifdef __ARCH_WANT_SYS_SIGPENDING
966 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
967 #endif
968
969 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
970 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
971 compat_old_sigset_t __user *oset);
972 #endif
973 #ifdef CONFIG_COMPAT_OLD_SIGACTION
974 asmlinkage long compat_sys_sigaction(int sig,
975 const struct compat_old_sigaction __user *act,
976 struct compat_old_sigaction __user *oact);
977 #endif
978
979 /* obsolete: kernel/time/time.c */
980 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
981
982 /* obsolete: net/socket.c */
983 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
984
985 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
986
987
988 /*
989 * For most but not all architectures, "am I in a compat syscall?" and
990 * "am I a compat task?" are the same question. For architectures on which
991 * they aren't the same question, arch code can override in_compat_syscall.
992 */
993
994 #ifndef in_compat_syscall
995 static inline bool in_compat_syscall(void) { return is_compat_task(); }
996 #endif
997
998 /**
999 * ns_to_compat_timeval - Compat version of ns_to_timeval
1000 * @nsec: the nanoseconds value to be converted
1001 *
1002 * Returns the compat_timeval representation of the nsec parameter.
1003 */
1004 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
1005 {
1006 struct timeval tv;
1007 struct compat_timeval ctv;
1008
1009 tv = ns_to_timeval(nsec);
1010 ctv.tv_sec = tv.tv_sec;
1011 ctv.tv_usec = tv.tv_usec;
1012
1013 return ctv;
1014 }
1015
1016 #else /* !CONFIG_COMPAT */
1017
1018 #define is_compat_task() (0)
1019 static inline bool in_compat_syscall(void) { return false; }
1020
1021 #endif /* CONFIG_COMPAT */
1022
1023 #endif /* _LINUX_COMPAT_H */
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