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