compat.h revision bebfa1013eee1d91b3242e5801cc8fbdfaf148ec 
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
17#define compat_jiffies_to_clock_t(x)	\
18		(((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
19
20typedef __compat_uid32_t	compat_uid_t;
21typedef __compat_gid32_t	compat_gid_t;
22
23struct rusage;
24
25struct compat_itimerspec {
26	struct compat_timespec it_interval;
27	struct compat_timespec it_value;
28};
29
30struct compat_utimbuf {
31	compat_time_t		actime;
32	compat_time_t		modtime;
33};
34
35struct compat_itimerval {
36	struct compat_timeval	it_interval;
37	struct compat_timeval	it_value;
38};
39
40struct compat_tms {
41	compat_clock_t		tms_utime;
42	compat_clock_t		tms_stime;
43	compat_clock_t		tms_cutime;
44	compat_clock_t		tms_cstime;
45};
46
47struct compat_timex {
48	compat_uint_t modes;
49	compat_long_t offset;
50	compat_long_t freq;
51	compat_long_t maxerror;
52	compat_long_t esterror;
53	compat_int_t status;
54	compat_long_t constant;
55	compat_long_t precision;
56	compat_long_t tolerance;
57	struct compat_timeval time;
58	compat_long_t tick;
59	compat_long_t ppsfreq;
60	compat_long_t jitter;
61	compat_int_t shift;
62	compat_long_t stabil;
63	compat_long_t jitcnt;
64	compat_long_t calcnt;
65	compat_long_t errcnt;
66	compat_long_t stbcnt;
67
68	compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
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};
72
73#define _COMPAT_NSIG_WORDS	(_COMPAT_NSIG / _COMPAT_NSIG_BPW)
74
75typedef struct {
76	compat_sigset_word	sig[_COMPAT_NSIG_WORDS];
77} compat_sigset_t;
78
79extern int cp_compat_stat(struct kstat *, struct compat_stat __user *);
80extern int get_compat_timespec(struct timespec *, const struct compat_timespec __user *);
81extern int put_compat_timespec(const struct timespec *, struct compat_timespec __user *);
82
83struct compat_iovec {
84	compat_uptr_t	iov_base;
85	compat_size_t	iov_len;
86};
87
88struct compat_rlimit {
89	compat_ulong_t	rlim_cur;
90	compat_ulong_t	rlim_max;
91};
92
93struct compat_rusage {
94	struct compat_timeval ru_utime;
95	struct compat_timeval ru_stime;
96	compat_long_t	ru_maxrss;
97	compat_long_t	ru_ixrss;
98	compat_long_t	ru_idrss;
99	compat_long_t	ru_isrss;
100	compat_long_t	ru_minflt;
101	compat_long_t	ru_majflt;
102	compat_long_t	ru_nswap;
103	compat_long_t	ru_inblock;
104	compat_long_t	ru_oublock;
105	compat_long_t	ru_msgsnd;
106	compat_long_t	ru_msgrcv;
107	compat_long_t	ru_nsignals;
108	compat_long_t	ru_nvcsw;
109	compat_long_t	ru_nivcsw;
110};
111
112extern int put_compat_rusage(const struct rusage *, struct compat_rusage __user *);
113
114struct compat_siginfo;
115
116extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
117		struct compat_siginfo __user *, int,
118		struct compat_rusage __user *);
119
120struct compat_dirent {
121	u32		d_ino;
122	compat_off_t	d_off;
123	u16		d_reclen;
124	char		d_name[256];
125};
126
127typedef union compat_sigval {
128	compat_int_t	sival_int;
129	compat_uptr_t	sival_ptr;
130} compat_sigval_t;
131
132#define COMPAT_SIGEV_PAD_SIZE	((SIGEV_MAX_SIZE/sizeof(int)) - 3)
133
134typedef struct compat_sigevent {
135	compat_sigval_t sigev_value;
136	compat_int_t sigev_signo;
137	compat_int_t sigev_notify;
138	union {
139		compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
140		compat_int_t _tid;
141
142		struct {
143			compat_uptr_t _function;
144			compat_uptr_t _attribute;
145		} _sigev_thread;
146	} _sigev_un;
147} compat_sigevent_t;
148
149struct compat_robust_list {
150	compat_uptr_t			next;
151};
152
153struct compat_robust_list_head {
154	struct compat_robust_list	list;
155	compat_long_t			futex_offset;
156	compat_uptr_t			list_op_pending;
157};
158
159extern void compat_exit_robust_list(struct task_struct *curr);
160
161asmlinkage long
162compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
163			   compat_size_t len);
164asmlinkage long
165compat_sys_get_robust_list(int pid, compat_uptr_t *head_ptr,
166			   compat_size_t __user *len_ptr);
167
168long compat_sys_semctl(int first, int second, int third, void __user *uptr);
169long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
170long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
171		int version, void __user *uptr);
172long compat_sys_msgctl(int first, int second, void __user *uptr);
173long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
174		void __user *uptr);
175long compat_sys_shmctl(int first, int second, void __user *uptr);
176long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
177		unsigned nsems, const struct compat_timespec __user *timeout);
178asmlinkage long compat_sys_keyctl(u32 option,
179			      u32 arg2, u32 arg3, u32 arg4, u32 arg5);
180
181asmlinkage ssize_t compat_sys_readv(unsigned long fd,
182		const struct compat_iovec __user *vec, unsigned long vlen);
183asmlinkage ssize_t compat_sys_writev(unsigned long fd,
184		const struct compat_iovec __user *vec, unsigned long vlen);
185
186int compat_do_execve(char * filename, compat_uptr_t __user *argv,
187	        compat_uptr_t __user *envp, struct pt_regs * regs);
188
189asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
190		compat_ulong_t __user *outp, compat_ulong_t __user *exp,
191		struct compat_timeval __user *tvp);
192
193#define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
194
195#define BITS_TO_COMPAT_LONGS(bits) \
196	(((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
197
198long compat_get_bitmap(unsigned long *mask, compat_ulong_t __user *umask,
199		       unsigned long bitmap_size);
200long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
201		       unsigned long bitmap_size);
202int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
203int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
204int get_compat_sigevent(struct sigevent *event,
205		const struct compat_sigevent __user *u_event);
206
207static inline int compat_timeval_compare(struct compat_timeval *lhs,
208					struct compat_timeval *rhs)
209{
210	if (lhs->tv_sec < rhs->tv_sec)
211		return -1;
212	if (lhs->tv_sec > rhs->tv_sec)
213		return 1;
214	return lhs->tv_usec - rhs->tv_usec;
215}
216
217static inline int compat_timespec_compare(struct compat_timespec *lhs,
218					struct compat_timespec *rhs)
219{
220	if (lhs->tv_sec < rhs->tv_sec)
221		return -1;
222	if (lhs->tv_sec > rhs->tv_sec)
223		return 1;
224	return lhs->tv_nsec - rhs->tv_nsec;
225}
226
227asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
228
229extern int compat_printk(const char *fmt, ...);
230
231#endif /* CONFIG_COMPAT */
232#endif /* _LINUX_COMPAT_H */
233