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 #define COMPAT_UTS_MACHINE      "mips\0\0\0"
  13
  14 typedef u32             compat_size_t;
  15 typedef s32             compat_ssize_t;
  16 typedef s32             compat_time_t;
  17 typedef s32             compat_clock_t;
  18 typedef s32             compat_suseconds_t;
  19
  20 typedef s32             compat_pid_t;
  21 typedef s32             __compat_uid_t;
  22 typedef s32             __compat_gid_t;
  23 typedef __compat_uid_t  __compat_uid32_t;
  24 typedef __compat_gid_t  __compat_gid32_t;
  25 typedef u32             compat_mode_t;
  26 typedef u32             compat_ino_t;
  27 typedef u32             compat_dev_t;
  28 typedef s32             compat_off_t;
  29 typedef s64             compat_loff_t;
  30 typedef u32             compat_nlink_t;
  31 typedef s32             compat_ipc_pid_t;
  32 typedef s32             compat_daddr_t;
  33 typedef s32             compat_caddr_t;
  34 typedef struct {
  35         s32     val[2];
  36 } compat_fsid_t;
  37 typedef s32             compat_timer_t;
  38 typedef s32             compat_key_t;
  39
  40 typedef s32             compat_int_t;
  41 typedef s32             compat_long_t;
  42 typedef s64             compat_s64;
  43 typedef u32             compat_uint_t;
  44 typedef u32             compat_ulong_t;
  45 typedef u64             compat_u64;
  46 typedef u32             compat_uptr_t;
  47
  48 struct compat_timespec {
  49         compat_time_t   tv_sec;
  50         s32             tv_nsec;
  51 };
  52
  53 struct compat_timeval {
  54         compat_time_t   tv_sec;
  55         s32             tv_usec;
  56 };
  57
  58 struct compat_stat {
  59         compat_dev_t    st_dev;
  60         s32             st_pad1[3];
  61         compat_ino_t    st_ino;
  62         compat_mode_t   st_mode;
  63         compat_nlink_t  st_nlink;
  64         __compat_uid_t  st_uid;
  65         __compat_gid_t  st_gid;
  66         compat_dev_t    st_rdev;
  67         s32             st_pad2[2];
  68         compat_off_t    st_size;
  69         s32             st_pad3;
  70         compat_time_t   st_atime;
  71         s32             st_atime_nsec;
  72         compat_time_t   st_mtime;
  73         s32             st_mtime_nsec;
  74         compat_time_t   st_ctime;
  75         s32             st_ctime_nsec;
  76         s32             st_blksize;
  77         s32             st_blocks;
  78         s32             st_pad4[14];
  79 };
  80
  81 struct compat_flock {
  82         short           l_type;
  83         short           l_whence;
  84         compat_off_t    l_start;
  85         compat_off_t    l_len;
  86         s32             l_sysid;
  87         compat_pid_t    l_pid;
  88         short           __unused;
  89         s32             pad[4];
  90 };
  91
  92 #define F_GETLK64       33
  93 #define F_SETLK64       34
  94 #define F_SETLKW64      35
  95
  96 struct compat_flock64 {
  97         short           l_type;
  98         short           l_whence;
  99         compat_loff_t   l_start;
 100         compat_loff_t   l_len;
 101         compat_pid_t    l_pid;
 102 };
 103
 104 struct compat_statfs {
 105         int             f_type;
 106         int             f_bsize;
 107         int             f_frsize;
 108         int             f_blocks;
 109         int             f_bfree;
 110         int             f_files;
 111         int             f_ffree;
 112         int             f_bavail;
 113         compat_fsid_t   f_fsid;
 114         int             f_namelen;
 115         int             f_flags;
 116         int             f_spare[5];
 117 };
 118
 119 #define COMPAT_RLIM_INFINITY    0x7fffffffUL
 120
 121 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 122
 123 #define _COMPAT_NSIG            128             /* Don't ask !$@#% ...  */
 124 #define _COMPAT_NSIG_BPW        32
 125
 126 typedef u32             compat_sigset_word;
 127
 128 typedef union compat_sigval {
 129         compat_int_t    sival_int;
 130         compat_uptr_t   sival_ptr;
 131 } compat_sigval_t;
 132
 133 /* Can't use the generic version because si_code and si_errno are swapped */
 134
 135 #define SI_PAD_SIZE32   (128/sizeof(int) - 3)
 136
 137 typedef struct compat_siginfo {
 138         int si_signo;
 139         int si_code;
 140         int si_errno;
 141
 142         union {
 143                 int _pad[128 / sizeof(int) - 3];
 144
 145                 /* kill() */
 146                 struct {
 147                         compat_pid_t _pid;      /* sender's pid */
 148                         __compat_uid32_t _uid;  /* sender's uid */
 149                 } _kill;
 150
 151                 /* POSIX.1b timers */
 152                 struct {
 153                         compat_timer_t _tid;    /* timer id */
 154                         int _overrun;           /* overrun count */
 155                         compat_sigval_t _sigval;        /* same as below */
 156                 } _timer;
 157
 158                 /* POSIX.1b signals */
 159                 struct {
 160                         compat_pid_t _pid;      /* sender's pid */
 161                         __compat_uid32_t _uid;  /* sender's uid */
 162                         compat_sigval_t _sigval;
 163                 } _rt;
 164
 165                 /* SIGCHLD */
 166                 struct {
 167                         compat_pid_t _pid;      /* which child */
 168                         __compat_uid32_t _uid;  /* sender's uid */
 169                         int _status;            /* exit code */
 170                         compat_clock_t _utime;
 171                         compat_clock_t _stime;
 172                 } _sigchld;
 173
 174                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
 175                 struct {
 176                         compat_uptr_t _addr;    /* faulting insn/memory ref. */
 177 #ifdef __ARCH_SI_TRAPNO
 178                         int _trapno;    /* TRAP # which caused the signal */
 179 #endif
 180                         short _addr_lsb; /* LSB of the reported address */
 181                         struct {
 182                                 compat_uptr_t _lower;
 183                                 compat_uptr_t _upper;
 184                         } _addr_bnd;
 185                 } _sigfault;
 186
 187                 /* SIGPOLL */
 188                 struct {
 189                         compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
 190                         int _fd;
 191                 } _sigpoll;
 192
 193                 struct {
 194                         compat_uptr_t _call_addr; /* calling insn */
 195                         int _syscall;   /* triggering system call number */
 196                         compat_uint_t _arch;    /* AUDIT_ARCH_* of syscall */
 197                 } _sigsys;
 198         } _sifields;
 199 } compat_siginfo_t;
 200
 201 #define COMPAT_OFF_T_MAX        0x7fffffff
 202 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 203
 204 /*
 205  * A pointer passed in from user mode. This should not
 206  * be used for syscall parameters, just declare them
 207  * as pointers because the syscall entry code will have
 208  * appropriately converted them already.
 209  */
 210
 211 static inline void __user *compat_ptr(compat_uptr_t uptr)
 212 {
 213         /* cast to a __user pointer via "unsigned long" makes sparse happy */
 214         return (void __user *)(unsigned long)(long)uptr;
 215 }
 216
 217 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 218 {
 219         return (u32)(unsigned long)uptr;
 220 }
 221
 222 static inline void __user *arch_compat_alloc_user_space(long len)
 223 {
 224         struct pt_regs *regs = (struct pt_regs *)
 225                 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
 226
 227         return (void __user *) (regs->regs[29] - len);
 228 }
 229
 230 struct compat_ipc64_perm {
 231         compat_key_t key;
 232         __compat_uid32_t uid;
 233         __compat_gid32_t gid;
 234         __compat_uid32_t cuid;
 235         __compat_gid32_t cgid;
 236         compat_mode_t mode;
 237         unsigned short seq;
 238         unsigned short __pad2;
 239         compat_ulong_t __unused1;
 240         compat_ulong_t __unused2;
 241 };
 242
 243 struct compat_semid64_ds {
 244         struct compat_ipc64_perm sem_perm;
 245         compat_time_t   sem_otime;
 246         compat_time_t   sem_ctime;
 247         compat_ulong_t  sem_nsems;
 248         compat_ulong_t  __unused1;
 249         compat_ulong_t  __unused2;
 250 };
 251
 252 struct compat_msqid64_ds {
 253         struct compat_ipc64_perm msg_perm;
 254 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 255         compat_ulong_t  __unused1;
 256 #endif
 257         compat_time_t   msg_stime;
 258 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 259         compat_ulong_t  __unused1;
 260 #endif
 261 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 262         compat_ulong_t  __unused2;
 263 #endif
 264         compat_time_t   msg_rtime;
 265 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 266         compat_ulong_t  __unused2;
 267 #endif
 268 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 269         compat_ulong_t  __unused3;
 270 #endif
 271         compat_time_t   msg_ctime;
 272 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 273         compat_ulong_t  __unused3;
 274 #endif
 275         compat_ulong_t  msg_cbytes;
 276         compat_ulong_t  msg_qnum;
 277         compat_ulong_t  msg_qbytes;
 278         compat_pid_t    msg_lspid;
 279         compat_pid_t    msg_lrpid;
 280         compat_ulong_t  __unused4;
 281         compat_ulong_t  __unused5;
 282 };
 283
 284 struct compat_shmid64_ds {
 285         struct compat_ipc64_perm shm_perm;
 286         compat_size_t   shm_segsz;
 287         compat_time_t   shm_atime;
 288         compat_time_t   shm_dtime;
 289         compat_time_t   shm_ctime;
 290         compat_pid_t    shm_cpid;
 291         compat_pid_t    shm_lpid;
 292         compat_ulong_t  shm_nattch;
 293         compat_ulong_t  __unused1;
 294         compat_ulong_t  __unused2;
 295 };
 296
 297 /* MIPS has unusual order of fields in stack_t */
 298 typedef struct compat_sigaltstack {
 299         compat_uptr_t                   ss_sp;
 300         compat_size_t                   ss_size;
 301         int                             ss_flags;
 302 } compat_stack_t;
 303 #define compat_sigaltstack compat_sigaltstack
 304
 305 static inline int is_compat_task(void)
 306 {
 307         return test_thread_flag(TIF_32BIT_ADDR);
 308 }
 309
 310 #endif /* _ASM_COMPAT_H */