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Linux/arch/powerpc/include/asm/compat.h

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  1 #ifndef _ASM_POWERPC_COMPAT_H
  2 #define _ASM_POWERPC_COMPAT_H
  3 #ifdef __KERNEL__
  4 /*
  5  * Architecture specific compatibility types
  6  */
  7 #include <linux/types.h>
  8 #include <linux/sched.h>
  9 
 10 #define COMPAT_USER_HZ          100
 11 #ifdef __BIG_ENDIAN__
 12 #define COMPAT_UTS_MACHINE      "ppc\0\0"
 13 #else
 14 #define COMPAT_UTS_MACHINE      "ppcle\0\0"
 15 #endif
 16 
 17 typedef u32             compat_size_t;
 18 typedef s32             compat_ssize_t;
 19 typedef s32             compat_time_t;
 20 typedef s32             compat_clock_t;
 21 typedef s32             compat_pid_t;
 22 typedef u32             __compat_uid_t;
 23 typedef u32             __compat_gid_t;
 24 typedef u32             __compat_uid32_t;
 25 typedef u32             __compat_gid32_t;
 26 typedef u32             compat_mode_t;
 27 typedef u32             compat_ino_t;
 28 typedef u32             compat_dev_t;
 29 typedef s32             compat_off_t;
 30 typedef s64             compat_loff_t;
 31 typedef s16             compat_nlink_t;
 32 typedef u16             compat_ipc_pid_t;
 33 typedef s32             compat_daddr_t;
 34 typedef u32             compat_caddr_t;
 35 typedef __kernel_fsid_t compat_fsid_t;
 36 typedef s32             compat_key_t;
 37 typedef s32             compat_timer_t;
 38 
 39 typedef s32             compat_int_t;
 40 typedef s32             compat_long_t;
 41 typedef s64             compat_s64;
 42 typedef u32             compat_uint_t;
 43 typedef u32             compat_ulong_t;
 44 typedef u64             compat_u64;
 45 typedef u32             compat_uptr_t;
 46 
 47 struct compat_timespec {
 48         compat_time_t   tv_sec;
 49         s32             tv_nsec;
 50 };
 51 
 52 struct compat_timeval {
 53         compat_time_t   tv_sec;
 54         s32             tv_usec;
 55 };
 56 
 57 struct compat_stat {
 58         compat_dev_t    st_dev;
 59         compat_ino_t    st_ino;
 60         compat_mode_t   st_mode;
 61         compat_nlink_t  st_nlink;
 62         __compat_uid32_t        st_uid;
 63         __compat_gid32_t        st_gid;
 64         compat_dev_t    st_rdev;
 65         compat_off_t    st_size;
 66         compat_off_t    st_blksize;
 67         compat_off_t    st_blocks;
 68         compat_time_t   st_atime;
 69         u32             st_atime_nsec;
 70         compat_time_t   st_mtime;
 71         u32             st_mtime_nsec;
 72         compat_time_t   st_ctime;
 73         u32             st_ctime_nsec;
 74         u32             __unused4[2];
 75 };
 76 
 77 struct compat_flock {
 78         short           l_type;
 79         short           l_whence;
 80         compat_off_t    l_start;
 81         compat_off_t    l_len;
 82         compat_pid_t    l_pid;
 83 };
 84 
 85 #define F_GETLK64       12      /*  using 'struct flock64' */
 86 #define F_SETLK64       13
 87 #define F_SETLKW64      14
 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         int             f_type;
 99         int             f_bsize;
100         int             f_blocks;
101         int             f_bfree;
102         int             f_bavail;
103         int             f_files;
104         int             f_ffree;
105         compat_fsid_t   f_fsid;
106         int             f_namelen;      /* SunOS ignores this field. */
107         int             f_frsize;
108         int             f_flags;
109         int             f_spare[4];
110 };
111 
112 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
113 #define COMPAT_RLIM_INFINITY            0xffffffff
114 
115 typedef u32             compat_old_sigset_t;
116 
117 #define _COMPAT_NSIG            64
118 #define _COMPAT_NSIG_BPW        32
119 
120 typedef u32             compat_sigset_word;
121 
122 typedef union compat_sigval {
123         compat_int_t    sival_int;
124         compat_uptr_t   sival_ptr;
125 } compat_sigval_t;
126 
127 #define SI_PAD_SIZE32   (128/sizeof(int) - 3)
128 
129 typedef struct compat_siginfo {
130         int si_signo;
131         int si_errno;
132         int si_code;
133 
134         union {
135                 int _pad[SI_PAD_SIZE32];
136 
137                 /* kill() */
138                 struct {
139                         compat_pid_t _pid;              /* sender's pid */
140                         __compat_uid_t _uid;            /* sender's uid */
141                 } _kill;
142 
143                 /* POSIX.1b timers */
144                 struct {
145                         compat_timer_t _tid;            /* timer id */
146                         int _overrun;                   /* overrun count */
147                         compat_sigval_t _sigval;        /* same as below */
148                         int _sys_private;       /* not to be passed to user */
149                 } _timer;
150 
151                 /* POSIX.1b signals */
152                 struct {
153                         compat_pid_t _pid;              /* sender's pid */
154                         __compat_uid_t _uid;            /* sender's uid */
155                         compat_sigval_t _sigval;
156                 } _rt;
157 
158                 /* SIGCHLD */
159                 struct {
160                         compat_pid_t _pid;              /* which child */
161                         __compat_uid_t _uid;            /* sender's uid */
162                         int _status;                    /* exit code */
163                         compat_clock_t _utime;
164                         compat_clock_t _stime;
165                 } _sigchld;
166 
167                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
168                 struct {
169                         unsigned int _addr; /* faulting insn/memory ref. */
170                 } _sigfault;
171 
172                 /* SIGPOLL */
173                 struct {
174                         int _band;      /* POLL_IN, POLL_OUT, POLL_MSG */
175                         int _fd;
176                 } _sigpoll;
177 
178                 /* SIGSYS */
179                 struct {
180                         unsigned int _call_addr; /* calling insn */
181                         int _syscall;            /* triggering system call number */
182                         unsigned int _arch;      /* AUDIT_ARCH_* of syscall */
183                 } _sigsys;
184         } _sifields;
185 } compat_siginfo_t;
186 
187 #define COMPAT_OFF_T_MAX        0x7fffffff
188 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
189 
190 /*
191  * A pointer passed in from user mode. This should not
192  * be used for syscall parameters, just declare them
193  * as pointers because the syscall entry code will have
194  * appropriately converted them already.
195  */
196 
197 static inline void __user *compat_ptr(compat_uptr_t uptr)
198 {
199         return (void __user *)(unsigned long)uptr;
200 }
201 
202 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
203 {
204         return (u32)(unsigned long)uptr;
205 }
206 
207 static inline void __user *arch_compat_alloc_user_space(long len)
208 {
209         struct pt_regs *regs = current->thread.regs;
210         unsigned long usp = regs->gpr[1];
211 
212         /*
213          * We can't access below the stack pointer in the 32bit ABI and
214          * can access 288 bytes in the 64bit big-endian ABI,
215          * or 512 bytes with the new ELFv2 little-endian ABI.
216          */
217         if (!is_32bit_task())
218                 usp -= USER_REDZONE_SIZE;
219 
220         return (void __user *) (usp - len);
221 }
222 
223 /*
224  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
225  * it we may as well define it.
226  */
227 struct compat_ipc64_perm {
228         compat_key_t key;
229         __compat_uid_t uid;
230         __compat_gid_t gid;
231         __compat_uid_t cuid;
232         __compat_gid_t cgid;
233         compat_mode_t mode;
234         unsigned int seq;
235         unsigned int __pad2;
236         unsigned long __unused1;        /* yes they really are 64bit pads */
237         unsigned long __unused2;
238 };
239 
240 struct compat_semid64_ds {
241         struct compat_ipc64_perm sem_perm;
242         unsigned int __unused1;
243         compat_time_t sem_otime;
244         unsigned int __unused2;
245         compat_time_t sem_ctime;
246         compat_ulong_t sem_nsems;
247         compat_ulong_t __unused3;
248         compat_ulong_t __unused4;
249 };
250 
251 struct compat_msqid64_ds {
252         struct compat_ipc64_perm msg_perm;
253         unsigned int __unused1;
254         compat_time_t msg_stime;
255         unsigned int __unused2;
256         compat_time_t msg_rtime;
257         unsigned int __unused3;
258         compat_time_t msg_ctime;
259         compat_ulong_t msg_cbytes;
260         compat_ulong_t msg_qnum;
261         compat_ulong_t msg_qbytes;
262         compat_pid_t msg_lspid;
263         compat_pid_t msg_lrpid;
264         compat_ulong_t __unused4;
265         compat_ulong_t __unused5;
266 };
267 
268 struct compat_shmid64_ds {
269         struct compat_ipc64_perm shm_perm;
270         unsigned int __unused1;
271         compat_time_t shm_atime;
272         unsigned int __unused2;
273         compat_time_t shm_dtime;
274         unsigned int __unused3;
275         compat_time_t shm_ctime;
276         unsigned int __unused4;
277         compat_size_t shm_segsz;
278         compat_pid_t shm_cpid;
279         compat_pid_t shm_lpid;
280         compat_ulong_t shm_nattch;
281         compat_ulong_t __unused5;
282         compat_ulong_t __unused6;
283 };
284 
285 static inline int is_compat_task(void)
286 {
287         return is_32bit_task();
288 }
289 
290 #endif /* __KERNEL__ */
291 #endif /* _ASM_POWERPC_COMPAT_H */
292 

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