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 #define COMPAT_UTS_MACHINE      "ppc\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 u32             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 s16             compat_nlink_t;
  28 typedef u16             compat_ipc_pid_t;
  29 typedef s32             compat_daddr_t;
  30 typedef u32             compat_caddr_t;
  31 typedef __kernel_fsid_t compat_fsid_t;
  32 typedef s32             compat_key_t;
  33 typedef s32             compat_timer_t;
  34
  35 typedef s32             compat_int_t;
  36 typedef s32             compat_long_t;
  37 typedef s64             compat_s64;
  38 typedef u32             compat_uint_t;
  39 typedef u32             compat_ulong_t;
  40 typedef u64             compat_u64;
  41
  42 struct compat_timespec {
  43         compat_time_t   tv_sec;
  44         s32             tv_nsec;
  45 };
  46
  47 struct compat_timeval {
  48         compat_time_t   tv_sec;
  49         s32             tv_usec;
  50 };
  51
  52 struct compat_stat {
  53         compat_dev_t    st_dev;
  54         compat_ino_t    st_ino;
  55         compat_mode_t   st_mode;
  56         compat_nlink_t  st_nlink;
  57         __compat_uid32_t        st_uid;
  58         __compat_gid32_t        st_gid;
  59         compat_dev_t    st_rdev;
  60         compat_off_t    st_size;
  61         compat_off_t    st_blksize;
  62         compat_off_t    st_blocks;
  63         compat_time_t   st_atime;
  64         u32             st_atime_nsec;
  65         compat_time_t   st_mtime;
  66         u32             st_mtime_nsec;
  67         compat_time_t   st_ctime;
  68         u32             st_ctime_nsec;
  69         u32             __unused4[2];
  70 };
  71
  72 struct compat_flock {
  73         short           l_type;
  74         short           l_whence;
  75         compat_off_t    l_start;
  76         compat_off_t    l_len;
  77         compat_pid_t    l_pid;
  78 };
  79
  80 #define F_GETLK64       12      /*  using 'struct flock64' */
  81 #define F_SETLK64       13
  82 #define F_SETLKW64      14
  83
  84 struct compat_flock64 {
  85         short           l_type;
  86         short           l_whence;
  87         compat_loff_t   l_start;
  88         compat_loff_t   l_len;
  89         compat_pid_t    l_pid;
  90 };
  91
  92 struct compat_statfs {
  93         int             f_type;
  94         int             f_bsize;
  95         int             f_blocks;
  96         int             f_bfree;
  97         int             f_bavail;
  98         int             f_files;
  99         int             f_ffree;
 100         compat_fsid_t   f_fsid;
 101         int             f_namelen;      /* SunOS ignores this field. */
 102         int             f_frsize;
 103         int             f_spare[5];
 104 };
 105
 106 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
 107 #define COMPAT_RLIM_INFINITY            0xffffffff
 108
 109 typedef u32             compat_old_sigset_t;
 110
 111 #define _COMPAT_NSIG            64
 112 #define _COMPAT_NSIG_BPW        32
 113
 114 typedef u32             compat_sigset_word;
 115
 116 #define COMPAT_OFF_T_MAX        0x7fffffff
 117 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 118
 119 /*
 120  * A pointer passed in from user mode. This should not
 121  * be used for syscall parameters, just declare them
 122  * as pointers because the syscall entry code will have
 123  * appropriately converted them already.
 124  */
 125 typedef u32             compat_uptr_t;
 126
 127 static inline void __user *compat_ptr(compat_uptr_t uptr)
 128 {
 129         return (void __user *)(unsigned long)uptr;
 130 }
 131
 132 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 133 {
 134         return (u32)(unsigned long)uptr;
 135 }
 136
 137 static inline void __user *arch_compat_alloc_user_space(long len)
 138 {
 139         struct pt_regs *regs = current->thread.regs;
 140         unsigned long usp = regs->gpr[1];
 141
 142         /*
 143          * We can't access below the stack pointer in the 32bit ABI and
 144          * can access 288 bytes in the 64bit ABI
 145          */
 146         if (!is_32bit_task())
 147                 usp -= 288;
 148
 149         return (void __user *) (usp - len);
 150 }
 151
 152 /*
 153  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
 154  * it we may as well define it.
 155  */
 156 struct compat_ipc64_perm {
 157         compat_key_t key;
 158         __compat_uid_t uid;
 159         __compat_gid_t gid;
 160         __compat_uid_t cuid;
 161         __compat_gid_t cgid;
 162         compat_mode_t mode;
 163         unsigned int seq;
 164         unsigned int __pad2;
 165         unsigned long __unused1;        /* yes they really are 64bit pads */
 166         unsigned long __unused2;
 167 };
 168
 169 struct compat_semid64_ds {
 170         struct compat_ipc64_perm sem_perm;
 171         unsigned int __unused1;
 172         compat_time_t sem_otime;
 173         unsigned int __unused2;
 174         compat_time_t sem_ctime;
 175         compat_ulong_t sem_nsems;
 176         compat_ulong_t __unused3;
 177         compat_ulong_t __unused4;
 178 };
 179
 180 struct compat_msqid64_ds {
 181         struct compat_ipc64_perm msg_perm;
 182         unsigned int __unused1;
 183         compat_time_t msg_stime;
 184         unsigned int __unused2;
 185         compat_time_t msg_rtime;
 186         unsigned int __unused3;
 187         compat_time_t msg_ctime;
 188         compat_ulong_t msg_cbytes;
 189         compat_ulong_t msg_qnum;
 190         compat_ulong_t msg_qbytes;
 191         compat_pid_t msg_lspid;
 192         compat_pid_t msg_lrpid;
 193         compat_ulong_t __unused4;
 194         compat_ulong_t __unused5;
 195 };
 196
 197 struct compat_shmid64_ds {
 198         struct compat_ipc64_perm shm_perm;
 199         unsigned int __unused1;
 200         compat_time_t shm_atime;
 201         unsigned int __unused2;
 202         compat_time_t shm_dtime;
 203         unsigned int __unused3;
 204         compat_time_t shm_ctime;
 205         unsigned int __unused4;
 206         compat_size_t shm_segsz;
 207         compat_pid_t shm_cpid;
 208         compat_pid_t shm_lpid;
 209         compat_ulong_t shm_nattch;
 210         compat_ulong_t __unused5;
 211         compat_ulong_t __unused6;
 212 };
 213
 214 static inline int is_compat_task(void)
 215 {
 216         return is_32bit_task();
 217 }
 218
 219 #endif /* __KERNEL__ */
 220 #endif /* _ASM_POWERPC_COMPAT_H */