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