arch/s390/include/asm/compat.h

   1 #ifndef _ASM_S390X_COMPAT_H
   2 #define _ASM_S390X_COMPAT_H
   3 /*
   4  * Architecture specific compatibility types
   5  */
   6 #include <linux/types.h>
   7 #include <linux/sched.h>
   8 #include <linux/sched/task_stack.h>
   9 #include <linux/thread_info.h>
  10
  11 #define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64))
  12
  13 #define __SC_DELOUSE(t,v) ({ \
  14         BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
  15         (t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
  16 })
  17
  18 #define PSW32_MASK_PER          0x40000000UL
  19 #define PSW32_MASK_DAT          0x04000000UL
  20 #define PSW32_MASK_IO           0x02000000UL
  21 #define PSW32_MASK_EXT          0x01000000UL
  22 #define PSW32_MASK_KEY          0x00F00000UL
  23 #define PSW32_MASK_BASE         0x00080000UL    /* Always one */
  24 #define PSW32_MASK_MCHECK       0x00040000UL
  25 #define PSW32_MASK_WAIT         0x00020000UL
  26 #define PSW32_MASK_PSTATE       0x00010000UL
  27 #define PSW32_MASK_ASC          0x0000C000UL
  28 #define PSW32_MASK_CC           0x00003000UL
  29 #define PSW32_MASK_PM           0x00000f00UL
  30 #define PSW32_MASK_RI           0x00000080UL
  31
  32 #define PSW32_MASK_USER         0x0000FF00UL
  33
  34 #define PSW32_ADDR_AMODE        0x80000000UL
  35 #define PSW32_ADDR_INSN         0x7FFFFFFFUL
  36
  37 #define PSW32_DEFAULT_KEY       (((u32) PAGE_DEFAULT_ACC) << 20)
  38
  39 #define PSW32_ASC_PRIMARY       0x00000000UL
  40 #define PSW32_ASC_ACCREG        0x00004000UL
  41 #define PSW32_ASC_SECONDARY     0x00008000UL
  42 #define PSW32_ASC_HOME          0x0000C000UL
  43
  44 #define PSW32_USER_BITS (PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | \
  45                          PSW32_DEFAULT_KEY | PSW32_MASK_BASE | \
  46                          PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \
  47                          PSW32_ASC_PRIMARY)
  48
  49 #define COMPAT_USER_HZ          100
  50 #define COMPAT_UTS_MACHINE      "s390\0\0\0\0"
  51
  52 typedef u32             compat_size_t;
  53 typedef s32             compat_ssize_t;
  54 typedef s32             compat_time_t;
  55 typedef s32             compat_clock_t;
  56 typedef s32             compat_pid_t;
  57 typedef u16             __compat_uid_t;
  58 typedef u16             __compat_gid_t;
  59 typedef u32             __compat_uid32_t;
  60 typedef u32             __compat_gid32_t;
  61 typedef u16             compat_mode_t;
  62 typedef u32             compat_ino_t;
  63 typedef u16             compat_dev_t;
  64 typedef s32             compat_off_t;
  65 typedef s64             compat_loff_t;
  66 typedef u16             compat_nlink_t;
  67 typedef u16             compat_ipc_pid_t;
  68 typedef s32             compat_daddr_t;
  69 typedef u32             compat_caddr_t;
  70 typedef __kernel_fsid_t compat_fsid_t;
  71 typedef s32             compat_key_t;
  72 typedef s32             compat_timer_t;
  73
  74 typedef s32             compat_int_t;
  75 typedef s32             compat_long_t;
  76 typedef s64             compat_s64;
  77 typedef u32             compat_uint_t;
  78 typedef u32             compat_ulong_t;
  79 typedef u64             compat_u64;
  80 typedef u32             compat_uptr_t;
  81
  82 typedef struct {
  83         u32 mask;
  84         u32 addr;
  85 } __aligned(8) psw_compat_t;
  86
  87 typedef struct {
  88         psw_compat_t psw;
  89         u32 gprs[NUM_GPRS];
  90         u32 acrs[NUM_ACRS];
  91         u32 orig_gpr2;
  92 } s390_compat_regs;
  93
  94 typedef struct {
  95         u32 gprs_high[NUM_GPRS];
  96 } s390_compat_regs_high;
  97
  98 struct compat_timespec {
  99         compat_time_t   tv_sec;
 100         s32             tv_nsec;
 101 };
 102
 103 struct compat_timeval {
 104         compat_time_t   tv_sec;
 105         s32             tv_usec;
 106 };
 107
 108 struct compat_stat {
 109         compat_dev_t    st_dev;
 110         u16             __pad1;
 111         compat_ino_t    st_ino;
 112         compat_mode_t   st_mode;
 113         compat_nlink_t  st_nlink;
 114         __compat_uid_t  st_uid;
 115         __compat_gid_t  st_gid;
 116         compat_dev_t    st_rdev;
 117         u16             __pad2;
 118         u32             st_size;
 119         u32             st_blksize;
 120         u32             st_blocks;
 121         u32             st_atime;
 122         u32             st_atime_nsec;
 123         u32             st_mtime;
 124         u32             st_mtime_nsec;
 125         u32             st_ctime;
 126         u32             st_ctime_nsec;
 127         u32             __unused4;
 128         u32             __unused5;
 129 };
 130
 131 struct compat_flock {
 132         short           l_type;
 133         short           l_whence;
 134         compat_off_t    l_start;
 135         compat_off_t    l_len;
 136         compat_pid_t    l_pid;
 137 };
 138
 139 #define F_GETLK64       12
 140 #define F_SETLK64       13
 141 #define F_SETLKW64      14
 142
 143 struct compat_flock64 {
 144         short           l_type;
 145         short           l_whence;
 146         compat_loff_t   l_start;
 147         compat_loff_t   l_len;
 148         compat_pid_t    l_pid;
 149 };
 150
 151 struct compat_statfs {
 152         u32             f_type;
 153         u32             f_bsize;
 154         u32             f_blocks;
 155         u32             f_bfree;
 156         u32             f_bavail;
 157         u32             f_files;
 158         u32             f_ffree;
 159         compat_fsid_t   f_fsid;
 160         u32             f_namelen;
 161         u32             f_frsize;
 162         u32             f_flags;
 163         u32             f_spare[4];
 164 };
 165
 166 struct compat_statfs64 {
 167         u32             f_type;
 168         u32             f_bsize;
 169         u64             f_blocks;
 170         u64             f_bfree;
 171         u64             f_bavail;
 172         u64             f_files;
 173         u64             f_ffree;
 174         compat_fsid_t   f_fsid;
 175         u32             f_namelen;
 176         u32             f_frsize;
 177         u32             f_flags;
 178         u32             f_spare[4];
 179 };
 180
 181 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
 182 #define COMPAT_RLIM_INFINITY            0xffffffff
 183
 184 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 185
 186 #define _COMPAT_NSIG            64
 187 #define _COMPAT_NSIG_BPW        32
 188
 189 typedef u32             compat_sigset_word;
 190
 191 typedef union compat_sigval {
 192         compat_int_t    sival_int;
 193         compat_uptr_t   sival_ptr;
 194 } compat_sigval_t;
 195
 196 typedef struct compat_siginfo {
 197         int     si_signo;
 198         int     si_errno;
 199         int     si_code;
 200
 201         union {
 202                 int _pad[128/sizeof(int) - 3];
 203
 204                 /* kill() */
 205                 struct {
 206                         pid_t   _pid;   /* sender's pid */
 207                         uid_t   _uid;   /* sender's uid */
 208                 } _kill;
 209
 210                 /* POSIX.1b timers */
 211                 struct {
 212                         compat_timer_t _tid;            /* timer id */
 213                         int _overrun;                   /* overrun count */
 214                         compat_sigval_t _sigval;        /* same as below */
 215                         int _sys_private;       /* not to be passed to user */
 216                 } _timer;
 217
 218                 /* POSIX.1b signals */
 219                 struct {
 220                         pid_t                   _pid;   /* sender's pid */
 221                         uid_t                   _uid;   /* sender's uid */
 222                         compat_sigval_t         _sigval;
 223                 } _rt;
 224
 225                 /* SIGCHLD */
 226                 struct {
 227                         pid_t                   _pid;   /* which child */
 228                         uid_t                   _uid;   /* sender's uid */
 229                         int                     _status;/* exit code */
 230                         compat_clock_t          _utime;
 231                         compat_clock_t          _stime;
 232                 } _sigchld;
 233
 234                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
 235                 struct {
 236                         __u32   _addr;  /* faulting insn/memory ref. - pointer */
 237                 } _sigfault;
 238
 239                 /* SIGPOLL */
 240                 struct {
 241                         int     _band;  /* POLL_IN, POLL_OUT, POLL_MSG */
 242                         int     _fd;
 243                 } _sigpoll;
 244         } _sifields;
 245 } compat_siginfo_t;
 246
 247 /*
 248  * How these fields are to be accessed.
 249  */
 250 #define si_pid          _sifields._kill._pid
 251 #define si_uid          _sifields._kill._uid
 252 #define si_status       _sifields._sigchld._status
 253 #define si_utime        _sifields._sigchld._utime
 254 #define si_stime        _sifields._sigchld._stime
 255 #define si_value        _sifields._rt._sigval
 256 #define si_int          _sifields._rt._sigval.sival_int
 257 #define si_ptr          _sifields._rt._sigval.sival_ptr
 258 #define si_addr         _sifields._sigfault._addr
 259 #define si_band         _sifields._sigpoll._band
 260 #define si_fd           _sifields._sigpoll._fd
 261 #define si_tid          _sifields._timer._tid
 262 #define si_overrun      _sifields._timer._overrun
 263
 264 #define COMPAT_OFF_T_MAX        0x7fffffff
 265 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 266
 267 /*
 268  * A pointer passed in from user mode. This should not
 269  * be used for syscall parameters, just declare them
 270  * as pointers because the syscall entry code will have
 271  * appropriately converted them already.
 272  */
 273
 274 static inline void __user *compat_ptr(compat_uptr_t uptr)
 275 {
 276         return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
 277 }
 278
 279 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 280 {
 281         return (u32)(unsigned long)uptr;
 282 }
 283
 284 #ifdef CONFIG_COMPAT
 285
 286 static inline int is_compat_task(void)
 287 {
 288         return test_thread_flag(TIF_31BIT);
 289 }
 290
 291 static inline void __user *arch_compat_alloc_user_space(long len)
 292 {
 293         unsigned long stack;
 294
 295         stack = KSTK_ESP(current);
 296         if (is_compat_task())
 297                 stack &= 0x7fffffffUL;
 298         return (void __user *) (stack - len);
 299 }
 300
 301 #endif
 302
 303 struct compat_ipc64_perm {
 304         compat_key_t key;
 305         __compat_uid32_t uid;
 306         __compat_gid32_t gid;
 307         __compat_uid32_t cuid;
 308         __compat_gid32_t cgid;
 309         compat_mode_t mode;
 310         unsigned short __pad1;
 311         unsigned short seq;
 312         unsigned short __pad2;
 313         unsigned int __unused1;
 314         unsigned int __unused2;
 315 };
 316
 317 struct compat_semid64_ds {
 318         struct compat_ipc64_perm sem_perm;
 319         compat_time_t  sem_otime;
 320         compat_ulong_t __pad1;
 321         compat_time_t  sem_ctime;
 322         compat_ulong_t __pad2;
 323         compat_ulong_t sem_nsems;
 324         compat_ulong_t __unused1;
 325         compat_ulong_t __unused2;
 326 };
 327
 328 struct compat_msqid64_ds {
 329         struct compat_ipc64_perm msg_perm;
 330         compat_time_t   msg_stime;
 331         compat_ulong_t __pad1;
 332         compat_time_t   msg_rtime;
 333         compat_ulong_t __pad2;
 334         compat_time_t   msg_ctime;
 335         compat_ulong_t __pad3;
 336         compat_ulong_t msg_cbytes;
 337         compat_ulong_t msg_qnum;
 338         compat_ulong_t msg_qbytes;
 339         compat_pid_t   msg_lspid;
 340         compat_pid_t   msg_lrpid;
 341         compat_ulong_t __unused1;
 342         compat_ulong_t __unused2;
 343 };
 344
 345 struct compat_shmid64_ds {
 346         struct compat_ipc64_perm shm_perm;
 347         compat_size_t  shm_segsz;
 348         compat_time_t  shm_atime;
 349         compat_ulong_t __pad1;
 350         compat_time_t  shm_dtime;
 351         compat_ulong_t __pad2;
 352         compat_time_t  shm_ctime;
 353         compat_ulong_t __pad3;
 354         compat_pid_t   shm_cpid;
 355         compat_pid_t   shm_lpid;
 356         compat_ulong_t shm_nattch;
 357         compat_ulong_t __unused1;
 358         compat_ulong_t __unused2;
 359 };
 360 #endif /* _ASM_S390X_COMPAT_H */