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 typedef u32             compat_uptr_t;
  42
  43 struct compat_timespec {
  44         compat_time_t   tv_sec;
  45         s32             tv_nsec;
  46 };
  47
  48 struct compat_timeval {
  49         compat_time_t   tv_sec;
  50         s32             tv_usec;
  51 };
  52
  53 struct compat_stat {
  54         compat_dev_t    st_dev;
  55         compat_ino_t    st_ino;
  56         compat_mode_t   st_mode;
  57         compat_nlink_t  st_nlink;
  58         __compat_uid32_t        st_uid;
  59         __compat_gid32_t        st_gid;
  60         compat_dev_t    st_rdev;
  61         compat_off_t    st_size;
  62         compat_off_t    st_blksize;
  63         compat_off_t    st_blocks;
  64         compat_time_t   st_atime;
  65         u32             st_atime_nsec;
  66         compat_time_t   st_mtime;
  67         u32             st_mtime_nsec;
  68         compat_time_t   st_ctime;
  69         u32             st_ctime_nsec;
  70         u32             __unused4[2];
  71 };
  72
  73 struct compat_flock {
  74         short           l_type;
  75         short           l_whence;
  76         compat_off_t    l_start;
  77         compat_off_t    l_len;
  78         compat_pid_t    l_pid;
  79 };
  80
  81 #define F_GETLK64       12      /*  using 'struct flock64' */
  82 #define F_SETLK64       13
  83 #define F_SETLKW64      14
  84
  85 struct compat_flock64 {
  86         short           l_type;
  87         short           l_whence;
  88         compat_loff_t   l_start;
  89         compat_loff_t   l_len;
  90         compat_pid_t    l_pid;
  91 };
  92
  93 struct compat_statfs {
  94         int             f_type;
  95         int             f_bsize;
  96         int             f_blocks;
  97         int             f_bfree;
  98         int             f_bavail;
  99         int             f_files;
 100         int             f_ffree;
 101         compat_fsid_t   f_fsid;
 102         int             f_namelen;      /* SunOS ignores this field. */
 103         int             f_frsize;
 104         int             f_flags;
 105         int             f_spare[4];
 106 };
 107
 108 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
 109 #define COMPAT_RLIM_INFINITY            0xffffffff
 110
 111 typedef u32             compat_old_sigset_t;
 112
 113 #define _COMPAT_NSIG            64
 114 #define _COMPAT_NSIG_BPW        32
 115
 116 typedef u32             compat_sigset_word;
 117
 118 typedef union compat_sigval {
 119         compat_int_t    sival_int;
 120         compat_uptr_t   sival_ptr;
 121 } compat_sigval_t;
 122
 123 #define SI_PAD_SIZE32   (128/sizeof(int) - 3)
 124
 125 typedef struct compat_siginfo {
 126         int si_signo;
 127         int si_errno;
 128         int si_code;
 129
 130         union {
 131                 int _pad[SI_PAD_SIZE32];
 132
 133                 /* kill() */
 134                 struct {
 135                         compat_pid_t _pid;              /* sender's pid */
 136                         __compat_uid_t _uid;            /* sender's uid */
 137                 } _kill;
 138
 139                 /* POSIX.1b timers */
 140                 struct {
 141                         compat_timer_t _tid;            /* timer id */
 142                         int _overrun;                   /* overrun count */
 143                         compat_sigval_t _sigval;        /* same as below */
 144                         int _sys_private;       /* not to be passed to user */
 145                 } _timer;
 146
 147                 /* POSIX.1b signals */
 148                 struct {
 149                         compat_pid_t _pid;              /* sender's pid */
 150                         __compat_uid_t _uid;            /* sender's uid */
 151                         compat_sigval_t _sigval;
 152                 } _rt;
 153
 154                 /* SIGCHLD */
 155                 struct {
 156                         compat_pid_t _pid;              /* which child */
 157                         __compat_uid_t _uid;            /* sender's uid */
 158                         int _status;                    /* exit code */
 159                         compat_clock_t _utime;
 160                         compat_clock_t _stime;
 161                 } _sigchld;
 162
 163                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
 164                 struct {
 165                         unsigned int _addr; /* faulting insn/memory ref. */
 166                 } _sigfault;
 167
 168                 /* SIGPOLL */
 169                 struct {
 170                         int _band;      /* POLL_IN, POLL_OUT, POLL_MSG */
 171                         int _fd;
 172                 } _sigpoll;
 173         } _sifields;
 174 } compat_siginfo_t;
 175
 176 #define COMPAT_OFF_T_MAX        0x7fffffff
 177 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 178
 179 /*
 180  * A pointer passed in from user mode. This should not
 181  * be used for syscall parameters, just declare them
 182  * as pointers because the syscall entry code will have
 183  * appropriately converted them already.
 184  */
 185
 186 static inline void __user *compat_ptr(compat_uptr_t uptr)
 187 {
 188         return (void __user *)(unsigned long)uptr;
 189 }
 190
 191 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 192 {
 193         return (u32)(unsigned long)uptr;
 194 }
 195
 196 static inline void __user *arch_compat_alloc_user_space(long len)
 197 {
 198         struct pt_regs *regs = current->thread.regs;
 199         unsigned long usp = regs->gpr[1];
 200
 201         /*
 202          * We can't access below the stack pointer in the 32bit ABI and
 203          * can access 288 bytes in the 64bit big-endian ABI,
 204          * or 512 bytes with the new ELFv2 little-endian ABI.
 205          */
 206         if (!is_32bit_task())
 207                 usp -= USER_REDZONE_SIZE;
 208
 209         return (void __user *) (usp - len);
 210 }
 211
 212 /*
 213  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
 214  * it we may as well define it.
 215  */
 216 struct compat_ipc64_perm {
 217         compat_key_t key;
 218         __compat_uid_t uid;
 219         __compat_gid_t gid;
 220         __compat_uid_t cuid;
 221         __compat_gid_t cgid;
 222         compat_mode_t mode;
 223         unsigned int seq;
 224         unsigned int __pad2;
 225         unsigned long __unused1;        /* yes they really are 64bit pads */
 226         unsigned long __unused2;
 227 };
 228
 229 struct compat_semid64_ds {
 230         struct compat_ipc64_perm sem_perm;
 231         unsigned int __unused1;
 232         compat_time_t sem_otime;
 233         unsigned int __unused2;
 234         compat_time_t sem_ctime;
 235         compat_ulong_t sem_nsems;
 236         compat_ulong_t __unused3;
 237         compat_ulong_t __unused4;
 238 };
 239
 240 struct compat_msqid64_ds {
 241         struct compat_ipc64_perm msg_perm;
 242         unsigned int __unused1;
 243         compat_time_t msg_stime;
 244         unsigned int __unused2;
 245         compat_time_t msg_rtime;
 246         unsigned int __unused3;
 247         compat_time_t msg_ctime;
 248         compat_ulong_t msg_cbytes;
 249         compat_ulong_t msg_qnum;
 250         compat_ulong_t msg_qbytes;
 251         compat_pid_t msg_lspid;
 252         compat_pid_t msg_lrpid;
 253         compat_ulong_t __unused4;
 254         compat_ulong_t __unused5;
 255 };
 256
 257 struct compat_shmid64_ds {
 258         struct compat_ipc64_perm shm_perm;
 259         unsigned int __unused1;
 260         compat_time_t shm_atime;
 261         unsigned int __unused2;
 262         compat_time_t shm_dtime;
 263         unsigned int __unused3;
 264         compat_time_t shm_ctime;
 265         unsigned int __unused4;
 266         compat_size_t shm_segsz;
 267         compat_pid_t shm_cpid;
 268         compat_pid_t shm_lpid;
 269         compat_ulong_t shm_nattch;
 270         compat_ulong_t __unused5;
 271         compat_ulong_t __unused6;
 272 };
 273
 274 static inline int is_compat_task(void)
 275 {
 276         return is_32bit_task();
 277 }
 278
 279 #endif /* __KERNEL__ */
 280 #endif /* _ASM_POWERPC_COMPAT_H */