compat.h revision 48b25c43e6eebb6c0edf72935e8720385beca76b 
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#ifdef CONFIG_COMPAT
9
10#include <linux/stat.h>
11#include <linux/param.h>	/* for HZ */
12#include <linux/sem.h>
13#include <linux/socket.h>
14#include <linux/if.h>
15#include <linux/fs.h>
16#include <linux/aio_abi.h>	/* for aio_context_t */
17
18#include <asm/compat.h>
19#include <asm/siginfo.h>
20#include <asm/signal.h>
21
22#define compat_jiffies_to_clock_t(x)	\
23		(((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
24
25typedef __compat_uid32_t	compat_uid_t;
26typedef __compat_gid32_t	compat_gid_t;
27
28struct compat_sel_arg_struct;
29struct rusage;
30
31struct compat_itimerspec {
32	struct compat_timespec it_interval;
33	struct compat_timespec it_value;
34};
35
36struct compat_utimbuf {
37	compat_time_t		actime;
38	compat_time_t		modtime;
39};
40
41struct compat_itimerval {
42	struct compat_timeval	it_interval;
43	struct compat_timeval	it_value;
44};
45
46struct compat_tms {
47	compat_clock_t		tms_utime;
48	compat_clock_t		tms_stime;
49	compat_clock_t		tms_cutime;
50	compat_clock_t		tms_cstime;
51};
52
53struct compat_timex {
54	compat_uint_t modes;
55	compat_long_t offset;
56	compat_long_t freq;
57	compat_long_t maxerror;
58	compat_long_t esterror;
59	compat_int_t status;
60	compat_long_t constant;
61	compat_long_t precision;
62	compat_long_t tolerance;
63	struct compat_timeval time;
64	compat_long_t tick;
65	compat_long_t ppsfreq;
66	compat_long_t jitter;
67	compat_int_t shift;
68	compat_long_t stabil;
69	compat_long_t jitcnt;
70	compat_long_t calcnt;
71	compat_long_t errcnt;
72	compat_long_t stbcnt;
73	compat_int_t tai;
74
75	compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
76	compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
77	compat_int_t:32; compat_int_t:32; compat_int_t:32;
78};
79
80#define _COMPAT_NSIG_WORDS	(_COMPAT_NSIG / _COMPAT_NSIG_BPW)
81
82typedef struct {
83	compat_sigset_word	sig[_COMPAT_NSIG_WORDS];
84} compat_sigset_t;
85
86extern int get_compat_timespec(struct timespec *,
87			       const struct compat_timespec __user *);
88extern int put_compat_timespec(const struct timespec *,
89			       struct compat_timespec __user *);
90
91struct compat_iovec {
92	compat_uptr_t	iov_base;
93	compat_size_t	iov_len;
94};
95
96struct compat_rlimit {
97	compat_ulong_t	rlim_cur;
98	compat_ulong_t	rlim_max;
99};
100
101struct compat_rusage {
102	struct compat_timeval ru_utime;
103	struct compat_timeval ru_stime;
104	compat_long_t	ru_maxrss;
105	compat_long_t	ru_ixrss;
106	compat_long_t	ru_idrss;
107	compat_long_t	ru_isrss;
108	compat_long_t	ru_minflt;
109	compat_long_t	ru_majflt;
110	compat_long_t	ru_nswap;
111	compat_long_t	ru_inblock;
112	compat_long_t	ru_oublock;
113	compat_long_t	ru_msgsnd;
114	compat_long_t	ru_msgrcv;
115	compat_long_t	ru_nsignals;
116	compat_long_t	ru_nvcsw;
117	compat_long_t	ru_nivcsw;
118};
119
120extern int put_compat_rusage(const struct rusage *,
121			     struct compat_rusage __user *);
122
123struct compat_siginfo;
124
125extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
126		struct compat_siginfo __user *, int,
127		struct compat_rusage __user *);
128
129struct compat_dirent {
130	u32		d_ino;
131	compat_off_t	d_off;
132	u16		d_reclen;
133	char		d_name[256];
134};
135
136struct compat_ustat {
137	compat_daddr_t		f_tfree;
138	compat_ino_t		f_tinode;
139	char			f_fname[6];
140	char			f_fpack[6];
141};
142
143typedef union compat_sigval {
144	compat_int_t	sival_int;
145	compat_uptr_t	sival_ptr;
146} compat_sigval_t;
147
148#define COMPAT_SIGEV_PAD_SIZE	((SIGEV_MAX_SIZE/sizeof(int)) - 3)
149
150typedef struct compat_sigevent {
151	compat_sigval_t sigev_value;
152	compat_int_t sigev_signo;
153	compat_int_t sigev_notify;
154	union {
155		compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
156		compat_int_t _tid;
157
158		struct {
159			compat_uptr_t _function;
160			compat_uptr_t _attribute;
161		} _sigev_thread;
162	} _sigev_un;
163} compat_sigevent_t;
164
165struct compat_ifmap {
166	compat_ulong_t mem_start;
167	compat_ulong_t mem_end;
168	unsigned short base_addr;
169	unsigned char irq;
170	unsigned char dma;
171	unsigned char port;
172};
173
174struct compat_if_settings {
175	unsigned int type;	/* Type of physical device or protocol */
176	unsigned int size;	/* Size of the data allocated by the caller */
177	compat_uptr_t ifs_ifsu;	/* union of pointers */
178};
179
180struct compat_ifreq {
181	union {
182		char	ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
183	} ifr_ifrn;
184	union {
185		struct	sockaddr ifru_addr;
186		struct	sockaddr ifru_dstaddr;
187		struct	sockaddr ifru_broadaddr;
188		struct	sockaddr ifru_netmask;
189		struct	sockaddr ifru_hwaddr;
190		short	ifru_flags;
191		compat_int_t	ifru_ivalue;
192		compat_int_t	ifru_mtu;
193		struct	compat_ifmap ifru_map;
194		char	ifru_slave[IFNAMSIZ];   /* Just fits the size */
195		char	ifru_newname[IFNAMSIZ];
196		compat_caddr_t	ifru_data;
197		struct	compat_if_settings ifru_settings;
198	} ifr_ifru;
199};
200
201struct compat_ifconf {
202	compat_int_t	ifc_len;                /* size of buffer */
203	compat_caddr_t  ifcbuf;
204};
205
206struct compat_robust_list {
207	compat_uptr_t			next;
208};
209
210struct compat_robust_list_head {
211	struct compat_robust_list	list;
212	compat_long_t			futex_offset;
213	compat_uptr_t			list_op_pending;
214};
215
216struct compat_statfs;
217struct compat_statfs64;
218struct compat_old_linux_dirent;
219struct compat_linux_dirent;
220struct linux_dirent64;
221struct compat_msghdr;
222struct compat_mmsghdr;
223struct compat_sysinfo;
224struct compat_sysctl_args;
225struct compat_kexec_segment;
226struct compat_mq_attr;
227struct compat_msgbuf;
228
229extern void compat_exit_robust_list(struct task_struct *curr);
230
231asmlinkage long
232compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
233			   compat_size_t len);
234asmlinkage long
235compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
236			   compat_size_t __user *len_ptr);
237
238#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
239long compat_sys_semctl(int first, int second, int third, void __user *uptr);
240long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
241long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
242		int version, void __user *uptr);
243long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
244		void __user *uptr);
245#else
246long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
247long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
248		size_t msgsz, int msgflg);
249long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
250		size_t msgsz, long msgtyp, int msgflg);
251long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
252#endif
253long compat_sys_msgctl(int first, int second, void __user *uptr);
254long compat_sys_shmctl(int first, int second, void __user *uptr);
255long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
256		unsigned nsems, const struct compat_timespec __user *timeout);
257asmlinkage long compat_sys_keyctl(u32 option,
258			      u32 arg2, u32 arg3, u32 arg4, u32 arg5);
259asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
260
261asmlinkage ssize_t compat_sys_readv(unsigned long fd,
262		const struct compat_iovec __user *vec, unsigned long vlen);
263asmlinkage ssize_t compat_sys_writev(unsigned long fd,
264		const struct compat_iovec __user *vec, unsigned long vlen);
265asmlinkage ssize_t compat_sys_preadv(unsigned long fd,
266		const struct compat_iovec __user *vec,
267		unsigned long vlen, u32 pos_low, u32 pos_high);
268asmlinkage ssize_t compat_sys_pwritev(unsigned long fd,
269		const struct compat_iovec __user *vec,
270		unsigned long vlen, u32 pos_low, u32 pos_high);
271
272int compat_do_execve(char *filename, compat_uptr_t __user *argv,
273		     compat_uptr_t __user *envp, struct pt_regs *regs);
274
275asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
276		compat_ulong_t __user *outp, compat_ulong_t __user *exp,
277		struct compat_timeval __user *tvp);
278
279asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
280
281asmlinkage long compat_sys_wait4(compat_pid_t pid,
282				 compat_uint_t __user *stat_addr, int options,
283				 struct compat_rusage __user *ru);
284
285#define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
286
287#define BITS_TO_COMPAT_LONGS(bits) \
288	(((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
289
290long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
291		       unsigned long bitmap_size);
292long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
293		       unsigned long bitmap_size);
294int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
295int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
296int get_compat_sigevent(struct sigevent *event,
297		const struct compat_sigevent __user *u_event);
298long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
299				  struct compat_siginfo __user *uinfo);
300
301static inline int compat_timeval_compare(struct compat_timeval *lhs,
302					struct compat_timeval *rhs)
303{
304	if (lhs->tv_sec < rhs->tv_sec)
305		return -1;
306	if (lhs->tv_sec > rhs->tv_sec)
307		return 1;
308	return lhs->tv_usec - rhs->tv_usec;
309}
310
311static inline int compat_timespec_compare(struct compat_timespec *lhs,
312					struct compat_timespec *rhs)
313{
314	if (lhs->tv_sec < rhs->tv_sec)
315		return -1;
316	if (lhs->tv_sec > rhs->tv_sec)
317		return 1;
318	return lhs->tv_nsec - rhs->tv_nsec;
319}
320
321extern int get_compat_itimerspec(struct itimerspec *dst,
322				 const struct compat_itimerspec __user *src);
323extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
324				 const struct itimerspec *src);
325
326asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
327		struct timezone __user *tz);
328asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
329		struct timezone __user *tz);
330
331asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
332
333extern int compat_printk(const char *fmt, ...);
334extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
335
336asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
337		compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
338		const compat_ulong_t __user *new_nodes);
339
340extern int compat_ptrace_request(struct task_struct *child,
341				 compat_long_t request,
342				 compat_ulong_t addr, compat_ulong_t data);
343
344extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
345			       compat_ulong_t addr, compat_ulong_t data);
346asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
347				  compat_long_t addr, compat_long_t data);
348
349/*
350 * epoll (fs/eventpoll.c) compat bits follow ...
351 */
352struct epoll_event;
353#define compat_epoll_event	epoll_event
354asmlinkage long compat_sys_epoll_pwait(int epfd,
355			struct compat_epoll_event __user *events,
356			int maxevents, int timeout,
357			const compat_sigset_t __user *sigmask,
358			compat_size_t sigsetsize);
359
360asmlinkage long compat_sys_utime(const char __user *filename,
361				 struct compat_utimbuf __user *t);
362asmlinkage long compat_sys_utimensat(unsigned int dfd,
363				     const char __user *filename,
364				     struct compat_timespec __user *t,
365				     int flags);
366
367asmlinkage long compat_sys_time(compat_time_t __user *tloc);
368asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
369asmlinkage long compat_sys_signalfd(int ufd,
370				    const compat_sigset_t __user *sigmask,
371				    compat_size_t sigsetsize);
372asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
373				   const struct compat_itimerspec __user *utmr,
374				   struct compat_itimerspec __user *otmr);
375asmlinkage long compat_sys_timerfd_gettime(int ufd,
376				   struct compat_itimerspec __user *otmr);
377
378asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page,
379				      __u32 __user *pages,
380				      const int __user *nodes,
381				      int __user *status,
382				      int flags);
383asmlinkage long compat_sys_futimesat(unsigned int dfd,
384				     const char __user *filename,
385				     struct compat_timeval __user *t);
386asmlinkage long compat_sys_utimes(const char __user *filename,
387				  struct compat_timeval __user *t);
388asmlinkage long compat_sys_newstat(const char __user *filename,
389				   struct compat_stat __user *statbuf);
390asmlinkage long compat_sys_newlstat(const char __user *filename,
391				    struct compat_stat __user *statbuf);
392asmlinkage long compat_sys_newfstatat(unsigned int dfd,
393				      const char __user *filename,
394				      struct compat_stat __user *statbuf,
395				      int flag);
396asmlinkage long compat_sys_newfstat(unsigned int fd,
397				    struct compat_stat __user *statbuf);
398asmlinkage long compat_sys_statfs(const char __user *pathname,
399				  struct compat_statfs __user *buf);
400asmlinkage long compat_sys_fstatfs(unsigned int fd,
401				   struct compat_statfs __user *buf);
402asmlinkage long compat_sys_statfs64(const char __user *pathname,
403				    compat_size_t sz,
404				    struct compat_statfs64 __user *buf);
405asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
406				     struct compat_statfs64 __user *buf);
407asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
408				   unsigned long arg);
409asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
410				 unsigned long arg);
411asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
412asmlinkage long compat_sys_io_getevents(aio_context_t ctx_id,
413					unsigned long min_nr,
414					unsigned long nr,
415					struct io_event __user *events,
416					struct compat_timespec __user *timeout);
417asmlinkage long compat_sys_io_submit(aio_context_t ctx_id, int nr,
418				     u32 __user *iocb);
419asmlinkage long compat_sys_mount(const char __user *dev_name,
420				 const char __user *dir_name,
421				 const char __user *type, unsigned long flags,
422				 const void __user *data);
423asmlinkage long compat_sys_old_readdir(unsigned int fd,
424				       struct compat_old_linux_dirent __user *,
425				       unsigned int count);
426asmlinkage long compat_sys_getdents(unsigned int fd,
427				    struct compat_linux_dirent __user *dirent,
428				    unsigned int count);
429asmlinkage long compat_sys_getdents64(unsigned int fd,
430				      struct linux_dirent64 __user *dirent,
431				      unsigned int count);
432asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
433				    unsigned int nr_segs, unsigned int flags);
434asmlinkage long compat_sys_open(const char __user *filename, int flags,
435				umode_t mode);
436asmlinkage long compat_sys_openat(unsigned int dfd, const char __user *filename,
437				  int flags, umode_t mode);
438asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
439					     struct file_handle __user *handle,
440					     int flags);
441asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
442				    compat_ulong_t __user *outp,
443				    compat_ulong_t __user *exp,
444				    struct compat_timespec __user *tsp,
445				    void __user *sig);
446asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
447				 unsigned int nfds,
448				 struct compat_timespec __user *tsp,
449				 const compat_sigset_t __user *sigmask,
450				 compat_size_t sigsetsize);
451asmlinkage long compat_sys_signalfd4(int ufd,
452				     const compat_sigset_t __user *sigmask,
453				     compat_size_t sigsetsize, int flags);
454asmlinkage long compat_sys_get_mempolicy(int __user *policy,
455					 compat_ulong_t __user *nmask,
456					 compat_ulong_t maxnode,
457					 compat_ulong_t addr,
458					 compat_ulong_t flags);
459asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
460					 compat_ulong_t maxnode);
461asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
462				 compat_ulong_t mode,
463				 compat_ulong_t __user *nmask,
464				 compat_ulong_t maxnode, compat_ulong_t flags);
465
466asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
467				      char __user *optval, unsigned int optlen);
468asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
469				   unsigned flags);
470asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
471				    unsigned vlen, unsigned int flags);
472asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
473				   unsigned int flags);
474asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len,
475				unsigned flags);
476asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
477			    unsigned flags, struct sockaddr __user *addr,
478			    int __user *addrlen);
479asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
480				    unsigned vlen, unsigned int flags,
481				    struct compat_timespec __user *timeout);
482asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
483				     struct compat_timespec __user *rmtp);
484asmlinkage long compat_sys_getitimer(int which,
485				     struct compat_itimerval __user *it);
486asmlinkage long compat_sys_setitimer(int which,
487				     struct compat_itimerval __user *in,
488				     struct compat_itimerval __user *out);
489asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
490asmlinkage long compat_sys_setrlimit(unsigned int resource,
491				     struct compat_rlimit __user *rlim);
492asmlinkage long compat_sys_getrlimit(unsigned int resource,
493				     struct compat_rlimit __user *rlim);
494asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
495asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
496				     unsigned int len,
497				     compat_ulong_t __user *user_mask_ptr);
498asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
499				     unsigned int len,
500				     compat_ulong_t __user *user_mask_ptr);
501asmlinkage long compat_sys_timer_create(clockid_t which_clock,
502			struct compat_sigevent __user *timer_event_spec,
503			timer_t __user *created_timer_id);
504asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
505					 struct compat_itimerspec __user *new,
506					 struct compat_itimerspec __user *old);
507asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
508				 struct compat_itimerspec __user *setting);
509asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
510					 struct compat_timespec __user *tp);
511asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
512					 struct compat_timespec __user *tp);
513asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
514					 struct compat_timex __user *tp);
515asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
516					struct compat_timespec __user *tp);
517asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
518					   struct compat_timespec __user *rqtp,
519					   struct compat_timespec __user *rmtp);
520asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
521		struct compat_siginfo __user *uinfo,
522		struct compat_timespec __user *uts, compat_size_t sigsetsize);
523asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
524					 compat_size_t sigsetsize);
525asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
526asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
527				 unsigned long arg);
528asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
529		struct compat_timespec __user *utime, u32 __user *uaddr2,
530		u32 val3);
531asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
532				      char __user *optval, int __user *optlen);
533asmlinkage long compat_sys_kexec_load(unsigned long entry,
534				      unsigned long nr_segments,
535				      struct compat_kexec_segment __user *,
536				      unsigned long flags);
537asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
538			const struct compat_mq_attr __user *u_mqstat,
539			struct compat_mq_attr __user *u_omqstat);
540asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
541			const struct compat_sigevent __user *u_notification);
542asmlinkage long compat_sys_mq_open(const char __user *u_name,
543			int oflag, compat_mode_t mode,
544			struct compat_mq_attr __user *u_attr);
545asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
546			const char __user *u_msg_ptr,
547			size_t msg_len, unsigned int msg_prio,
548			const struct compat_timespec __user *u_abs_timeout);
549asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
550			char __user *u_msg_ptr,
551			size_t msg_len, unsigned int __user *u_msg_prio,
552			const struct compat_timespec __user *u_abs_timeout);
553asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
554asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
555
556extern ssize_t compat_rw_copy_check_uvector(int type,
557		const struct compat_iovec __user *uvector,
558		unsigned long nr_segs,
559		unsigned long fast_segs, struct iovec *fast_pointer,
560		struct iovec **ret_pointer,
561		int check_access);
562
563extern void __user *compat_alloc_user_space(unsigned long len);
564
565asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
566		const struct compat_iovec __user *lvec,
567		unsigned long liovcnt, const struct compat_iovec __user *rvec,
568		unsigned long riovcnt, unsigned long flags);
569asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
570		const struct compat_iovec __user *lvec,
571		unsigned long liovcnt, const struct compat_iovec __user *rvec,
572		unsigned long riovcnt, unsigned long flags);
573
574#else
575
576#define is_compat_task() (0)
577
578#endif /* CONFIG_COMPAT */
579#endif /* _LINUX_COMPAT_H */
580