compat.h revision 032d82d9065dec0e26718eca376c2029e4bd0595 
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
14#include <asm/compat.h>
15#include <asm/siginfo.h>
16#include <asm/signal.h>
17
18#define compat_jiffies_to_clock_t(x)	\
19		(((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
20
21typedef __compat_uid32_t	compat_uid_t;
22typedef __compat_gid32_t	compat_gid_t;
23
24struct rusage;
25
26struct compat_itimerspec {
27	struct compat_timespec it_interval;
28	struct compat_timespec it_value;
29};
30
31struct compat_utimbuf {
32	compat_time_t		actime;
33	compat_time_t		modtime;
34};
35
36struct compat_itimerval {
37	struct compat_timeval	it_interval;
38	struct compat_timeval	it_value;
39};
40
41struct compat_tms {
42	compat_clock_t		tms_utime;
43	compat_clock_t		tms_stime;
44	compat_clock_t		tms_cutime;
45	compat_clock_t		tms_cstime;
46};
47
48struct compat_timex {
49	compat_uint_t modes;
50	compat_long_t offset;
51	compat_long_t freq;
52	compat_long_t maxerror;
53	compat_long_t esterror;
54	compat_int_t status;
55	compat_long_t constant;
56	compat_long_t precision;
57	compat_long_t tolerance;
58	struct compat_timeval time;
59	compat_long_t tick;
60	compat_long_t ppsfreq;
61	compat_long_t jitter;
62	compat_int_t shift;
63	compat_long_t stabil;
64	compat_long_t jitcnt;
65	compat_long_t calcnt;
66	compat_long_t errcnt;
67	compat_long_t stbcnt;
68
69	compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
70	compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
71	compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
72};
73
74#define _COMPAT_NSIG_WORDS	(_COMPAT_NSIG / _COMPAT_NSIG_BPW)
75
76typedef struct {
77	compat_sigset_word	sig[_COMPAT_NSIG_WORDS];
78} compat_sigset_t;
79
80extern int cp_compat_stat(struct kstat *, struct compat_stat __user *);
81extern int get_compat_timespec(struct timespec *, const struct compat_timespec __user *);
82extern int put_compat_timespec(const struct timespec *, struct compat_timespec __user *);
83
84struct compat_iovec {
85	compat_uptr_t	iov_base;
86	compat_size_t	iov_len;
87};
88
89struct compat_rlimit {
90	compat_ulong_t	rlim_cur;
91	compat_ulong_t	rlim_max;
92};
93
94struct compat_rusage {
95	struct compat_timeval ru_utime;
96	struct compat_timeval ru_stime;
97	compat_long_t	ru_maxrss;
98	compat_long_t	ru_ixrss;
99	compat_long_t	ru_idrss;
100	compat_long_t	ru_isrss;
101	compat_long_t	ru_minflt;
102	compat_long_t	ru_majflt;
103	compat_long_t	ru_nswap;
104	compat_long_t	ru_inblock;
105	compat_long_t	ru_oublock;
106	compat_long_t	ru_msgsnd;
107	compat_long_t	ru_msgrcv;
108	compat_long_t	ru_nsignals;
109	compat_long_t	ru_nvcsw;
110	compat_long_t	ru_nivcsw;
111};
112
113extern int put_compat_rusage(const struct rusage *, struct compat_rusage __user *);
114
115struct compat_siginfo;
116
117extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
118		struct compat_siginfo __user *, int,
119		struct compat_rusage __user *);
120
121struct compat_dirent {
122	u32		d_ino;
123	compat_off_t	d_off;
124	u16		d_reclen;
125	char		d_name[256];
126};
127
128typedef union compat_sigval {
129	compat_int_t	sival_int;
130	compat_uptr_t	sival_ptr;
131} compat_sigval_t;
132
133#define COMPAT_SIGEV_PAD_SIZE	((SIGEV_MAX_SIZE/sizeof(int)) - 3)
134
135typedef struct compat_sigevent {
136	compat_sigval_t sigev_value;
137	compat_int_t sigev_signo;
138	compat_int_t sigev_notify;
139	union {
140		compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
141		compat_int_t _tid;
142
143		struct {
144			compat_uptr_t _function;
145			compat_uptr_t _attribute;
146		} _sigev_thread;
147	} _sigev_un;
148} compat_sigevent_t;
149
150struct compat_robust_list {
151	compat_uptr_t			next;
152};
153
154struct compat_robust_list_head {
155	struct compat_robust_list	list;
156	compat_long_t			futex_offset;
157	compat_uptr_t			list_op_pending;
158};
159
160extern void compat_exit_robust_list(struct task_struct *curr);
161
162asmlinkage long
163compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
164			   compat_size_t len);
165asmlinkage long
166compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
167			   compat_size_t __user *len_ptr);
168
169long compat_sys_semctl(int first, int second, int third, void __user *uptr);
170long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
171long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
172		int version, void __user *uptr);
173long compat_sys_msgctl(int first, int second, void __user *uptr);
174long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
175		void __user *uptr);
176long compat_sys_shmctl(int first, int second, void __user *uptr);
177long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
178		unsigned nsems, const struct compat_timespec __user *timeout);
179asmlinkage long compat_sys_keyctl(u32 option,
180			      u32 arg2, u32 arg3, u32 arg4, u32 arg5);
181
182asmlinkage ssize_t compat_sys_readv(unsigned long fd,
183		const struct compat_iovec __user *vec, unsigned long vlen);
184asmlinkage ssize_t compat_sys_writev(unsigned long fd,
185		const struct compat_iovec __user *vec, unsigned long vlen);
186
187int compat_do_execve(char * filename, compat_uptr_t __user *argv,
188	        compat_uptr_t __user *envp, struct pt_regs * regs);
189
190asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
191		compat_ulong_t __user *outp, compat_ulong_t __user *exp,
192		struct compat_timeval __user *tvp);
193
194asmlinkage long compat_sys_wait4(compat_pid_t pid,
195				 compat_uint_t *stat_addr, int options,
196				 struct compat_rusage *ru);
197
198#define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
199
200#define BITS_TO_COMPAT_LONGS(bits) \
201	(((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
202
203long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
204		       unsigned long bitmap_size);
205long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
206		       unsigned long bitmap_size);
207int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
208int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
209int get_compat_sigevent(struct sigevent *event,
210		const struct compat_sigevent __user *u_event);
211
212static inline int compat_timeval_compare(struct compat_timeval *lhs,
213					struct compat_timeval *rhs)
214{
215	if (lhs->tv_sec < rhs->tv_sec)
216		return -1;
217	if (lhs->tv_sec > rhs->tv_sec)
218		return 1;
219	return lhs->tv_usec - rhs->tv_usec;
220}
221
222static inline int compat_timespec_compare(struct compat_timespec *lhs,
223					struct compat_timespec *rhs)
224{
225	if (lhs->tv_sec < rhs->tv_sec)
226		return -1;
227	if (lhs->tv_sec > rhs->tv_sec)
228		return 1;
229	return lhs->tv_nsec - rhs->tv_nsec;
230}
231
232extern int get_compat_itimerspec(struct itimerspec *dst,
233				 const struct compat_itimerspec __user *src);
234extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
235				 const struct itimerspec *src);
236
237asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
238
239extern int compat_printk(const char *fmt, ...);
240extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
241
242asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
243		compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
244		const compat_ulong_t __user *new_nodes);
245
246extern int compat_ptrace_request(struct task_struct *child,
247				 compat_long_t request,
248				 compat_ulong_t addr, compat_ulong_t data);
249
250/*
251 * epoll (fs/eventpoll.c) compat bits follow ...
252 */
253#ifndef CONFIG_HAS_COMPAT_EPOLL_EVENT
254struct epoll_event;
255#define compat_epoll_event	epoll_event
256#else
257asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd,
258			struct compat_epoll_event __user *event);
259asmlinkage long compat_sys_epoll_wait(int epfd,
260			struct compat_epoll_event __user *events,
261			int maxevents, int timeout);
262#endif
263asmlinkage long compat_sys_epoll_pwait(int epfd,
264			struct compat_epoll_event __user *events,
265			int maxevents, int timeout,
266			const compat_sigset_t __user *sigmask,
267			compat_size_t sigsetsize);
268
269asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename,
270				struct compat_timespec __user *t, int flags);
271
272asmlinkage long compat_sys_signalfd(int ufd,
273				const compat_sigset_t __user *sigmask,
274                                compat_size_t sigsetsize);
275asmlinkage long compat_sys_timerfd(int ufd, int clockid, int flags,
276				const struct compat_itimerspec __user *utmr);
277
278#endif /* CONFIG_COMPAT */
279#endif /* _LINUX_COMPAT_H */
280