compat: Make compat_alloc_user_space() incorporate the access_ok()
[linux-2.6.git] / arch / parisc / include / asm / compat.h
1 #ifndef _ASM_PARISC_COMPAT_H
2 #define _ASM_PARISC_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 COMPAT_USER_HZ          100
11 #define COMPAT_UTS_MACHINE      "parisc\0\0"
12
13 typedef u32     compat_size_t;
14 typedef s32     compat_ssize_t;
15 typedef s32     compat_time_t;
16 typedef s32     compat_clock_t;
17 typedef s32     compat_pid_t;
18 typedef u32     __compat_uid_t;
19 typedef u32     __compat_gid_t;
20 typedef u32     __compat_uid32_t;
21 typedef u32     __compat_gid32_t;
22 typedef u16     compat_mode_t;
23 typedef u32     compat_ino_t;
24 typedef u32     compat_dev_t;
25 typedef s32     compat_off_t;
26 typedef s64     compat_loff_t;
27 typedef u16     compat_nlink_t;
28 typedef u16     compat_ipc_pid_t;
29 typedef s32     compat_daddr_t;
30 typedef u32     compat_caddr_t;
31 typedef s32     compat_timer_t;
32
33 typedef s32     compat_int_t;
34 typedef s32     compat_long_t;
35 typedef s64     compat_s64;
36 typedef u32     compat_uint_t;
37 typedef u32     compat_ulong_t;
38 typedef u64     compat_u64;
39
40 struct compat_timespec {
41         compat_time_t           tv_sec;
42         s32                     tv_nsec;
43 };
44
45 struct compat_timeval {
46         compat_time_t           tv_sec;
47         s32                     tv_usec;
48 };
49
50 struct compat_stat {
51         compat_dev_t            st_dev; /* dev_t is 32 bits on parisc */
52         compat_ino_t            st_ino; /* 32 bits */
53         compat_mode_t           st_mode;        /* 16 bits */
54         compat_nlink_t          st_nlink;       /* 16 bits */
55         u16                     st_reserved1;   /* old st_uid */
56         u16                     st_reserved2;   /* old st_gid */
57         compat_dev_t            st_rdev;
58         compat_off_t            st_size;
59         compat_time_t           st_atime;
60         u32                     st_atime_nsec;
61         compat_time_t           st_mtime;
62         u32                     st_mtime_nsec;
63         compat_time_t           st_ctime;
64         u32                     st_ctime_nsec;
65         s32                     st_blksize;
66         s32                     st_blocks;
67         u32                     __unused1;      /* ACL stuff */
68         compat_dev_t            __unused2;      /* network */
69         compat_ino_t            __unused3;      /* network */
70         u32                     __unused4;      /* cnodes */
71         u16                     __unused5;      /* netsite */
72         short                   st_fstype;
73         compat_dev_t            st_realdev;
74         u16                     st_basemode;
75         u16                     st_spareshort;
76         __compat_uid32_t        st_uid;
77         __compat_gid32_t        st_gid;
78         u32                     st_spare4[3];
79 };
80
81 struct compat_flock {
82         short                   l_type;
83         short                   l_whence;
84         compat_off_t            l_start;
85         compat_off_t            l_len;
86         compat_pid_t            l_pid;
87 };
88
89 struct compat_flock64 {
90         short                   l_type;
91         short                   l_whence;
92         compat_loff_t           l_start;
93         compat_loff_t           l_len;
94         compat_pid_t            l_pid;
95 };
96
97 struct compat_statfs {
98         s32             f_type;
99         s32             f_bsize;
100         s32             f_blocks;
101         s32             f_bfree;
102         s32             f_bavail;
103         s32             f_files;
104         s32             f_ffree;
105         __kernel_fsid_t f_fsid;
106         s32             f_namelen;
107         s32             f_frsize;
108         s32             f_spare[5];
109 };
110
111 struct compat_sigcontext {
112         compat_int_t sc_flags;
113         compat_int_t sc_gr[32]; /* PSW in sc_gr[0] */
114         u64 sc_fr[32];
115         compat_int_t sc_iasq[2];
116         compat_int_t sc_iaoq[2];
117         compat_int_t sc_sar; /* cr11 */
118 };
119
120 #define COMPAT_RLIM_INFINITY 0xffffffff
121
122 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
123
124 #define _COMPAT_NSIG            64
125 #define _COMPAT_NSIG_BPW        32
126
127 typedef u32             compat_sigset_word;
128
129 #define COMPAT_OFF_T_MAX        0x7fffffff
130 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
131
132 /*
133  * A pointer passed in from user mode. This should not
134  * be used for syscall parameters, just declare them
135  * as pointers because the syscall entry code will have
136  * appropriately converted them already.
137  */
138 typedef u32             compat_uptr_t;
139
140 static inline void __user *compat_ptr(compat_uptr_t uptr)
141 {
142         return (void __user *)(unsigned long)uptr;
143 }
144
145 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
146 {
147         return (u32)(unsigned long)uptr;
148 }
149
150 static __inline__ void __user *arch_compat_alloc_user_space(long len)
151 {
152         struct pt_regs *regs = &current->thread.regs;
153         return (void __user *)regs->gr[30];
154 }
155
156 static inline int __is_compat_task(struct task_struct *t)
157 {
158         return test_ti_thread_flag(task_thread_info(t), TIF_32BIT);
159 }
160
161 static inline int is_compat_task(void)
162 {
163         return __is_compat_task(current);
164 }
165
166 #endif /* _ASM_PARISC_COMPAT_H */