compat: Make compat_alloc_user_space() incorporate the access_ok()
[linux-2.6.git] / arch / s390 / include / asm / compat.h
1 #ifndef _ASM_S390X_COMPAT_H
2 #define _ASM_S390X_COMPAT_H
3 /*
4  * Architecture specific compatibility types
5  */
6 #include <linux/types.h>
7 #include <linux/sched.h>
8 #include <linux/thread_info.h>
9
10 #define PSW32_MASK_PER          0x40000000UL
11 #define PSW32_MASK_DAT          0x04000000UL
12 #define PSW32_MASK_IO           0x02000000UL
13 #define PSW32_MASK_EXT          0x01000000UL
14 #define PSW32_MASK_KEY          0x00F00000UL
15 #define PSW32_MASK_MCHECK       0x00040000UL
16 #define PSW32_MASK_WAIT         0x00020000UL
17 #define PSW32_MASK_PSTATE       0x00010000UL
18 #define PSW32_MASK_ASC          0x0000C000UL
19 #define PSW32_MASK_CC           0x00003000UL
20 #define PSW32_MASK_PM           0x00000f00UL
21
22 #define PSW32_ADDR_AMODE31      0x80000000UL
23 #define PSW32_ADDR_INSN         0x7FFFFFFFUL
24
25 #define PSW32_BASE_BITS         0x00080000UL
26
27 #define PSW32_ASC_PRIMARY       0x00000000UL
28 #define PSW32_ASC_ACCREG        0x00004000UL
29 #define PSW32_ASC_SECONDARY     0x00008000UL
30 #define PSW32_ASC_HOME          0x0000C000UL
31
32 #define PSW32_MASK_MERGE(CURRENT,NEW) \
33         (((CURRENT) & ~(PSW32_MASK_CC|PSW32_MASK_PM)) | \
34          ((NEW) & (PSW32_MASK_CC|PSW32_MASK_PM)))
35
36 extern long psw32_user_bits;
37
38 #define COMPAT_USER_HZ          100
39 #define COMPAT_UTS_MACHINE      "s390\0\0\0\0"
40
41 typedef u32             compat_size_t;
42 typedef s32             compat_ssize_t;
43 typedef s32             compat_time_t;
44 typedef s32             compat_clock_t;
45 typedef s32             compat_pid_t;
46 typedef u16             __compat_uid_t;
47 typedef u16             __compat_gid_t;
48 typedef u32             __compat_uid32_t;
49 typedef u32             __compat_gid32_t;
50 typedef u16             compat_mode_t;
51 typedef u32             compat_ino_t;
52 typedef u16             compat_dev_t;
53 typedef s32             compat_off_t;
54 typedef s64             compat_loff_t;
55 typedef u16             compat_nlink_t;
56 typedef u16             compat_ipc_pid_t;
57 typedef s32             compat_daddr_t;
58 typedef u32             compat_caddr_t;
59 typedef __kernel_fsid_t compat_fsid_t;
60 typedef s32             compat_key_t;
61 typedef s32             compat_timer_t;
62
63 typedef s32             compat_int_t;
64 typedef s32             compat_long_t;
65 typedef s64             compat_s64;
66 typedef u32             compat_uint_t;
67 typedef u32             compat_ulong_t;
68 typedef u64             compat_u64;
69
70 struct compat_timespec {
71         compat_time_t   tv_sec;
72         s32             tv_nsec;
73 };
74
75 struct compat_timeval {
76         compat_time_t   tv_sec;
77         s32             tv_usec;
78 };
79
80 struct compat_stat {
81         compat_dev_t    st_dev;
82         u16             __pad1;
83         compat_ino_t    st_ino;
84         compat_mode_t   st_mode;
85         compat_nlink_t  st_nlink;
86         __compat_uid_t  st_uid;
87         __compat_gid_t  st_gid;
88         compat_dev_t    st_rdev;
89         u16             __pad2;
90         u32             st_size;
91         u32             st_blksize;
92         u32             st_blocks;
93         u32             st_atime;
94         u32             st_atime_nsec;
95         u32             st_mtime;
96         u32             st_mtime_nsec;
97         u32             st_ctime;
98         u32             st_ctime_nsec;
99         u32             __unused4;
100         u32             __unused5;
101 };
102
103 struct compat_flock {
104         short           l_type;
105         short           l_whence;
106         compat_off_t    l_start;
107         compat_off_t    l_len;
108         compat_pid_t    l_pid;
109 };
110
111 #define F_GETLK64       12
112 #define F_SETLK64       13
113 #define F_SETLKW64      14    
114
115 struct compat_flock64 {
116         short           l_type;
117         short           l_whence;
118         compat_loff_t   l_start;
119         compat_loff_t   l_len;
120         compat_pid_t    l_pid;
121 };
122
123 struct compat_statfs {
124         s32             f_type;
125         s32             f_bsize;
126         s32             f_blocks;
127         s32             f_bfree;
128         s32             f_bavail;
129         s32             f_files;
130         s32             f_ffree;
131         compat_fsid_t   f_fsid;
132         s32             f_namelen;
133         s32             f_frsize;
134         s32             f_spare[6];
135 };
136
137 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
138 #define COMPAT_RLIM_INFINITY            0xffffffff
139
140 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
141
142 #define _COMPAT_NSIG            64
143 #define _COMPAT_NSIG_BPW        32
144
145 typedef u32             compat_sigset_word;
146
147 #define COMPAT_OFF_T_MAX        0x7fffffff
148 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
149
150 /*
151  * A pointer passed in from user mode. This should not
152  * be used for syscall parameters, just declare them
153  * as pointers because the syscall entry code will have
154  * appropriately converted them already.
155  */
156 typedef u32             compat_uptr_t;
157
158 static inline void __user *compat_ptr(compat_uptr_t uptr)
159 {
160         return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
161 }
162
163 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
164 {
165         return (u32)(unsigned long)uptr;
166 }
167
168 #ifdef CONFIG_COMPAT
169
170 static inline int is_compat_task(void)
171 {
172         return test_thread_flag(TIF_31BIT);
173 }
174
175 #else
176
177 static inline int is_compat_task(void)
178 {
179         return 0;
180 }
181
182 #endif
183
184 static inline void __user *arch_compat_alloc_user_space(long len)
185 {
186         unsigned long stack;
187
188         stack = KSTK_ESP(current);
189         if (is_compat_task())
190                 stack &= 0x7fffffffUL;
191         return (void __user *) (stack - len);
192 }
193
194 struct compat_ipc64_perm {
195         compat_key_t key;
196         __compat_uid32_t uid;
197         __compat_gid32_t gid;
198         __compat_uid32_t cuid;
199         __compat_gid32_t cgid;
200         compat_mode_t mode;
201         unsigned short __pad1;
202         unsigned short seq;
203         unsigned short __pad2;
204         unsigned int __unused1;
205         unsigned int __unused2;
206 };
207
208 struct compat_semid64_ds {
209         struct compat_ipc64_perm sem_perm;
210         compat_time_t  sem_otime;
211         compat_ulong_t __pad1;
212         compat_time_t  sem_ctime;
213         compat_ulong_t __pad2;
214         compat_ulong_t sem_nsems;
215         compat_ulong_t __unused1;
216         compat_ulong_t __unused2;
217 };
218
219 struct compat_msqid64_ds {
220         struct compat_ipc64_perm msg_perm;
221         compat_time_t   msg_stime;
222         compat_ulong_t __pad1;
223         compat_time_t   msg_rtime;
224         compat_ulong_t __pad2;
225         compat_time_t   msg_ctime;
226         compat_ulong_t __pad3;
227         compat_ulong_t msg_cbytes;
228         compat_ulong_t msg_qnum;
229         compat_ulong_t msg_qbytes;
230         compat_pid_t   msg_lspid;
231         compat_pid_t   msg_lrpid;
232         compat_ulong_t __unused1;
233         compat_ulong_t __unused2;
234 };
235
236 struct compat_shmid64_ds {
237         struct compat_ipc64_perm shm_perm;
238         compat_size_t  shm_segsz;
239         compat_time_t  shm_atime;
240         compat_ulong_t __pad1;
241         compat_time_t  shm_dtime;
242         compat_ulong_t __pad2;
243         compat_time_t  shm_ctime;
244         compat_ulong_t __pad3;
245         compat_pid_t   shm_cpid;
246         compat_pid_t   shm_lpid;
247         compat_ulong_t shm_nattch;
248         compat_ulong_t __unused1;
249         compat_ulong_t __unused2;
250 };
251 #endif /* _ASM_S390X_COMPAT_H */