arch/mips/include/asm/compat.h

   1 #ifndef _ASM_COMPAT_H
   2 #define _ASM_COMPAT_H
   3 /*
   4  * Architecture specific compatibility types
   5  */
   6 #include <linux/thread_info.h>
   7 #include <linux/types.h>
   8 #include <asm/page.h>
   9 #include <asm/ptrace.h>
  10
  11 #define COMPAT_USER_HZ  100
  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_suseconds_t;
  18
  19 typedef s32             compat_pid_t;
  20 typedef s32             __compat_uid_t;
  21 typedef s32             __compat_gid_t;
  22 typedef __compat_uid_t  __compat_uid32_t;
  23 typedef __compat_gid_t  __compat_gid32_t;
  24 typedef u32             compat_mode_t;
  25 typedef u32             compat_ino_t;
  26 typedef u32             compat_dev_t;
  27 typedef s32             compat_off_t;
  28 typedef s64             compat_loff_t;
  29 typedef u32             compat_nlink_t;
  30 typedef s32             compat_ipc_pid_t;
  31 typedef s32             compat_daddr_t;
  32 typedef s32             compat_caddr_t;
  33 typedef struct {
  34         s32     val[2];
  35 } compat_fsid_t;
  36 typedef s32             compat_timer_t;
  37 typedef s32             compat_key_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
  46 struct compat_timespec {
  47         compat_time_t   tv_sec;
  48         s32             tv_nsec;
  49 };
  50
  51 struct compat_timeval {
  52         compat_time_t   tv_sec;
  53         s32             tv_usec;
  54 };
  55
  56 struct compat_stat {
  57         compat_dev_t    st_dev;
  58         s32             st_pad1[3];
  59         compat_ino_t    st_ino;
  60         compat_mode_t   st_mode;
  61         compat_nlink_t  st_nlink;
  62         __compat_uid_t  st_uid;
  63         __compat_gid_t  st_gid;
  64         compat_dev_t    st_rdev;
  65         s32             st_pad2[2];
  66         compat_off_t    st_size;
  67         s32             st_pad3;
  68         compat_time_t   st_atime;
  69         s32             st_atime_nsec;
  70         compat_time_t   st_mtime;
  71         s32             st_mtime_nsec;
  72         compat_time_t   st_ctime;
  73         s32             st_ctime_nsec;
  74         s32             st_blksize;
  75         s32             st_blocks;
  76         s32             st_pad4[14];
  77 };
  78
  79 struct compat_flock {
  80         short           l_type;
  81         short           l_whence;
  82         compat_off_t    l_start;
  83         compat_off_t    l_len;
  84         s32             l_sysid;
  85         compat_pid_t    l_pid;
  86         short           __unused;
  87         s32             pad[4];
  88 };
  89
  90 #define F_GETLK64       33
  91 #define F_SETLK64       34
  92 #define F_SETLKW64      35
  93
  94 struct compat_flock64 {
  95         short           l_type;
  96         short           l_whence;
  97         compat_loff_t   l_start;
  98         compat_loff_t   l_len;
  99         compat_pid_t    l_pid;
 100 };
 101
 102 struct compat_statfs {
 103         int             f_type;
 104         int             f_bsize;
 105         int             f_frsize;
 106         int             f_blocks;
 107         int             f_bfree;
 108         int             f_files;
 109         int             f_ffree;
 110         int             f_bavail;
 111         compat_fsid_t   f_fsid;
 112         int             f_namelen;
 113         int             f_spare[6];
 114 };
 115
 116 #define COMPAT_RLIM_INFINITY    0x7fffffffUL
 117
 118 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 119
 120 #define _COMPAT_NSIG            128             /* Don't ask !$@#% ...  */
 121 #define _COMPAT_NSIG_BPW        32
 122
 123 typedef u32             compat_sigset_word;
 124
 125 #define COMPAT_OFF_T_MAX        0x7fffffff
 126 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 127
 128 /*
 129  * A pointer passed in from user mode. This should not
 130  * be used for syscall parameters, just declare them
 131  * as pointers because the syscall entry code will have
 132  * appropriately converted them already.
 133  */
 134 typedef u32             compat_uptr_t;
 135
 136 static inline void __user *compat_ptr(compat_uptr_t uptr)
 137 {
 138         /* cast to a __user pointer via "unsigned long" makes sparse happy */
 139         return (void __user *)(unsigned long)(long)uptr;
 140 }
 141
 142 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 143 {
 144         return (u32)(unsigned long)uptr;
 145 }
 146
 147 static inline void __user *compat_alloc_user_space(long len)
 148 {
 149         struct pt_regs *regs = (struct pt_regs *)
 150                 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
 151
 152         return (void __user *) (regs->regs[29] - len);
 153 }
 154
 155 struct compat_ipc64_perm {
 156         compat_key_t key;
 157         __compat_uid32_t uid;
 158         __compat_gid32_t gid;
 159         __compat_uid32_t cuid;
 160         __compat_gid32_t cgid;
 161         compat_mode_t mode;
 162         unsigned short seq;
 163         unsigned short __pad2;
 164         compat_ulong_t __unused1;
 165         compat_ulong_t __unused2;
 166 };
 167
 168 struct compat_semid64_ds {
 169         struct compat_ipc64_perm sem_perm;
 170         compat_time_t   sem_otime;
 171         compat_time_t   sem_ctime;
 172         compat_ulong_t  sem_nsems;
 173         compat_ulong_t  __unused1;
 174         compat_ulong_t  __unused2;
 175 };
 176
 177 struct compat_msqid64_ds {
 178         struct compat_ipc64_perm msg_perm;
 179 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 180         compat_ulong_t  __unused1;
 181 #endif
 182         compat_time_t   msg_stime;
 183 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 184         compat_ulong_t  __unused1;
 185 #endif
 186 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 187         compat_ulong_t  __unused2;
 188 #endif
 189         compat_time_t   msg_rtime;
 190 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 191         compat_ulong_t  __unused2;
 192 #endif
 193 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 194         compat_ulong_t  __unused3;
 195 #endif
 196         compat_time_t   msg_ctime;
 197 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 198         compat_ulong_t  __unused3;
 199 #endif
 200         compat_ulong_t  msg_cbytes;
 201         compat_ulong_t  msg_qnum;
 202         compat_ulong_t  msg_qbytes;
 203         compat_pid_t    msg_lspid;
 204         compat_pid_t    msg_lrpid;
 205         compat_ulong_t  __unused4;
 206         compat_ulong_t  __unused5;
 207 };
 208
 209 struct compat_shmid64_ds {
 210         struct compat_ipc64_perm shm_perm;
 211         compat_size_t   shm_segsz;
 212         compat_time_t   shm_atime;
 213         compat_time_t   shm_dtime;
 214         compat_time_t   shm_ctime;
 215         compat_pid_t    shm_cpid;
 216         compat_pid_t    shm_lpid;
 217         compat_ulong_t  shm_nattch;
 218         compat_ulong_t  __unused1;
 219         compat_ulong_t  __unused2;
 220 };
 221
 222 static inline int is_compat_task(void)
 223 {
 224         return test_thread_flag(TIF_32BIT);
 225 }
 226
 227 #endif /* _ASM_COMPAT_H */