arch/powerpc/include/asm/compat.h

   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
  12 typedef u32             compat_size_t;
  13 typedef s32             compat_ssize_t;
  14 typedef s32             compat_time_t;
  15 typedef s32             compat_clock_t;
  16 typedef s32             compat_pid_t;
  17 typedef u32             __compat_uid_t;
  18 typedef u32             __compat_gid_t;
  19 typedef u32             __compat_uid32_t;
  20 typedef u32             __compat_gid32_t;
  21 typedef u32             compat_mode_t;
  22 typedef u32             compat_ino_t;
  23 typedef u32             compat_dev_t;
  24 typedef s32             compat_off_t;
  25 typedef s64             compat_loff_t;
  26 typedef s16             compat_nlink_t;
  27 typedef u16             compat_ipc_pid_t;
  28 typedef s32             compat_daddr_t;
  29 typedef u32             compat_caddr_t;
  30 typedef __kernel_fsid_t compat_fsid_t;
  31 typedef s32             compat_key_t;
  32 typedef s32             compat_timer_t;
  33
  34 typedef s32             compat_int_t;
  35 typedef s32             compat_long_t;
  36 typedef s64             compat_s64;
  37 typedef u32             compat_uint_t;
  38 typedef u32             compat_ulong_t;
  39 typedef u64             compat_u64;
  40
  41 struct compat_timespec {
  42         compat_time_t   tv_sec;
  43         s32             tv_nsec;
  44 };
  45
  46 struct compat_timeval {
  47         compat_time_t   tv_sec;
  48         s32             tv_usec;
  49 };
  50
  51 struct compat_stat {
  52         compat_dev_t    st_dev;
  53         compat_ino_t    st_ino;
  54         compat_mode_t   st_mode;
  55         compat_nlink_t  st_nlink;
  56         __compat_uid32_t        st_uid;
  57         __compat_gid32_t        st_gid;
  58         compat_dev_t    st_rdev;
  59         compat_off_t    st_size;
  60         compat_off_t    st_blksize;
  61         compat_off_t    st_blocks;
  62         compat_time_t   st_atime;
  63         u32             st_atime_nsec;
  64         compat_time_t   st_mtime;
  65         u32             st_mtime_nsec;
  66         compat_time_t   st_ctime;
  67         u32             st_ctime_nsec;
  68         u32             __unused4[2];
  69 };
  70
  71 struct compat_flock {
  72         short           l_type;
  73         short           l_whence;
  74         compat_off_t    l_start;
  75         compat_off_t    l_len;
  76         compat_pid_t    l_pid;
  77 };
  78
  79 #define F_GETLK64       12      /*  using 'struct flock64' */
  80 #define F_SETLK64       13
  81 #define F_SETLKW64      14
  82
  83 struct compat_flock64 {
  84         short           l_type;
  85         short           l_whence;
  86         compat_loff_t   l_start;
  87         compat_loff_t   l_len;
  88         compat_pid_t    l_pid;
  89 };
  90
  91 struct compat_statfs {
  92         int             f_type;
  93         int             f_bsize;
  94         int             f_blocks;
  95         int             f_bfree;
  96         int             f_bavail;
  97         int             f_files;
  98         int             f_ffree;
  99         compat_fsid_t   f_fsid;
 100         int             f_namelen;      /* SunOS ignores this field. */
 101         int             f_frsize;
 102         int             f_spare[5];
 103 };
 104
 105 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
 106 #define COMPAT_RLIM_INFINITY            0xffffffff
 107
 108 typedef u32             compat_old_sigset_t;
 109
 110 #define _COMPAT_NSIG            64
 111 #define _COMPAT_NSIG_BPW        32
 112
 113 typedef u32             compat_sigset_word;
 114
 115 #define COMPAT_OFF_T_MAX        0x7fffffff
 116 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 117
 118 /*
 119  * A pointer passed in from user mode. This should not
 120  * be used for syscall parameters, just declare them
 121  * as pointers because the syscall entry code will have
 122  * appropriately converted them already.
 123  */
 124 typedef u32             compat_uptr_t;
 125
 126 static inline void __user *compat_ptr(compat_uptr_t uptr)
 127 {
 128         return (void __user *)(unsigned long)uptr;
 129 }
 130
 131 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 132 {
 133         return (u32)(unsigned long)uptr;
 134 }
 135
 136 static inline void __user *compat_alloc_user_space(long len)
 137 {
 138         struct pt_regs *regs = current->thread.regs;
 139         unsigned long usp = regs->gpr[1];
 140
 141         /*
 142          * We cant access below the stack pointer in the 32bit ABI and
 143          * can access 288 bytes in the 64bit ABI
 144          */
 145         if (!(test_thread_flag(TIF_32BIT)))
 146                 usp -= 288;
 147
 148         return (void __user *) (usp - len);
 149 }
 150
 151 /*
 152  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
 153  * it we may as well define it.
 154  */
 155 struct compat_ipc64_perm {
 156         compat_key_t key;
 157         __compat_uid_t uid;
 158         __compat_gid_t gid;
 159         __compat_uid_t cuid;
 160         __compat_gid_t cgid;
 161         compat_mode_t mode;
 162         unsigned int seq;
 163         unsigned int __pad2;
 164         unsigned long __unused1;        /* yes they really are 64bit pads */
 165         unsigned long __unused2;
 166 };
 167
 168 struct compat_semid64_ds {
 169         struct compat_ipc64_perm sem_perm;
 170         unsigned int __unused1;
 171         compat_time_t sem_otime;
 172         unsigned int __unused2;
 173         compat_time_t sem_ctime;
 174         compat_ulong_t sem_nsems;
 175         compat_ulong_t __unused3;
 176         compat_ulong_t __unused4;
 177 };
 178
 179 struct compat_msqid64_ds {
 180         struct compat_ipc64_perm msg_perm;
 181         unsigned int __unused1;
 182         compat_time_t msg_stime;
 183         unsigned int __unused2;
 184         compat_time_t msg_rtime;
 185         unsigned int __unused3;
 186         compat_time_t msg_ctime;
 187         compat_ulong_t msg_cbytes;
 188         compat_ulong_t msg_qnum;
 189         compat_ulong_t msg_qbytes;
 190         compat_pid_t msg_lspid;
 191         compat_pid_t msg_lrpid;
 192         compat_ulong_t __unused4;
 193         compat_ulong_t __unused5;
 194 };
 195
 196 struct compat_shmid64_ds {
 197         struct compat_ipc64_perm shm_perm;
 198         unsigned int __unused1;
 199         compat_time_t shm_atime;
 200         unsigned int __unused2;
 201         compat_time_t shm_dtime;
 202         unsigned int __unused3;
 203         compat_time_t shm_ctime;
 204         unsigned int __unused4;
 205         compat_size_t shm_segsz;
 206         compat_pid_t shm_cpid;
 207         compat_pid_t shm_lpid;
 208         compat_ulong_t shm_nattch;
 209         compat_ulong_t __unused5;
 210         compat_ulong_t __unused6;
 211 };
 212
 213 static inline int is_compat_task(void)
 214 {
 215         return test_thread_flag(TIF_32BIT);
 216 }
 217
 218 #endif /* __KERNEL__ */
 219 #endif /* _ASM_POWERPC_COMPAT_H */