arch/s390/include/asm/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_S390X_COMPAT_H
   3 #define _ASM_S390X_COMPAT_H
   4 /*
   5  * Architecture specific compatibility types
   6  */
   7 #include <linux/types.h>
   8 #include <linux/sched.h>
   9 #include <linux/sched/task_stack.h>
  10 #include <linux/thread_info.h>
  11
  12 #define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p( \
  13                                 typeof(0?(__force t)0:0ULL), u64))
  14
  15 #define __SC_DELOUSE(t,v) ({ \
  16         BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
  17         (__force t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
  18 })
  19
  20 #define PSW32_MASK_PER          0x40000000UL
  21 #define PSW32_MASK_DAT          0x04000000UL
  22 #define PSW32_MASK_IO           0x02000000UL
  23 #define PSW32_MASK_EXT          0x01000000UL
  24 #define PSW32_MASK_KEY          0x00F00000UL
  25 #define PSW32_MASK_BASE         0x00080000UL    /* Always one */
  26 #define PSW32_MASK_MCHECK       0x00040000UL
  27 #define PSW32_MASK_WAIT         0x00020000UL
  28 #define PSW32_MASK_PSTATE       0x00010000UL
  29 #define PSW32_MASK_ASC          0x0000C000UL
  30 #define PSW32_MASK_CC           0x00003000UL
  31 #define PSW32_MASK_PM           0x00000f00UL
  32 #define PSW32_MASK_RI           0x00000080UL
  33
  34 #define PSW32_MASK_USER         0x0000FF00UL
  35
  36 #define PSW32_ADDR_AMODE        0x80000000UL
  37 #define PSW32_ADDR_INSN         0x7FFFFFFFUL
  38
  39 #define PSW32_DEFAULT_KEY       (((u32) PAGE_DEFAULT_ACC) << 20)
  40
  41 #define PSW32_ASC_PRIMARY       0x00000000UL
  42 #define PSW32_ASC_ACCREG        0x00004000UL
  43 #define PSW32_ASC_SECONDARY     0x00008000UL
  44 #define PSW32_ASC_HOME          0x0000C000UL
  45
  46 #define PSW32_USER_BITS (PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | \
  47                          PSW32_DEFAULT_KEY | PSW32_MASK_BASE | \
  48                          PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \
  49                          PSW32_ASC_PRIMARY)
  50
  51 #define COMPAT_USER_HZ          100
  52 #define COMPAT_UTS_MACHINE      "s390\0\0\0\0"
  53
  54 typedef u32             compat_size_t;
  55 typedef s32             compat_ssize_t;
  56 typedef s32             compat_time_t;
  57 typedef s32             compat_clock_t;
  58 typedef s32             compat_pid_t;
  59 typedef u16             __compat_uid_t;
  60 typedef u16             __compat_gid_t;
  61 typedef u32             __compat_uid32_t;
  62 typedef u32             __compat_gid32_t;
  63 typedef u16             compat_mode_t;
  64 typedef u32             compat_ino_t;
  65 typedef u16             compat_dev_t;
  66 typedef s32             compat_off_t;
  67 typedef s64             compat_loff_t;
  68 typedef u16             compat_nlink_t;
  69 typedef u16             compat_ipc_pid_t;
  70 typedef s32             compat_daddr_t;
  71 typedef u32             compat_caddr_t;
  72 typedef __kernel_fsid_t compat_fsid_t;
  73 typedef s32             compat_key_t;
  74 typedef s32             compat_timer_t;
  75
  76 typedef s32             compat_int_t;
  77 typedef s32             compat_long_t;
  78 typedef s64             compat_s64;
  79 typedef u32             compat_uint_t;
  80 typedef u32             compat_ulong_t;
  81 typedef u64             compat_u64;
  82 typedef u32             compat_uptr_t;
  83
  84 typedef struct {
  85         u32 mask;
  86         u32 addr;
  87 } __aligned(8) psw_compat_t;
  88
  89 typedef struct {
  90         psw_compat_t psw;
  91         u32 gprs[NUM_GPRS];
  92         u32 acrs[NUM_ACRS];
  93         u32 orig_gpr2;
  94 } s390_compat_regs;
  95
  96 typedef struct {
  97         u32 gprs_high[NUM_GPRS];
  98 } s390_compat_regs_high;
  99
 100 struct compat_timespec {
 101         compat_time_t   tv_sec;
 102         s32             tv_nsec;
 103 };
 104
 105 struct compat_timeval {
 106         compat_time_t   tv_sec;
 107         s32             tv_usec;
 108 };
 109
 110 struct compat_stat {
 111         compat_dev_t    st_dev;
 112         u16             __pad1;
 113         compat_ino_t    st_ino;
 114         compat_mode_t   st_mode;
 115         compat_nlink_t  st_nlink;
 116         __compat_uid_t  st_uid;
 117         __compat_gid_t  st_gid;
 118         compat_dev_t    st_rdev;
 119         u16             __pad2;
 120         u32             st_size;
 121         u32             st_blksize;
 122         u32             st_blocks;
 123         u32             st_atime;
 124         u32             st_atime_nsec;
 125         u32             st_mtime;
 126         u32             st_mtime_nsec;
 127         u32             st_ctime;
 128         u32             st_ctime_nsec;
 129         u32             __unused4;
 130         u32             __unused5;
 131 };
 132
 133 struct compat_flock {
 134         short           l_type;
 135         short           l_whence;
 136         compat_off_t    l_start;
 137         compat_off_t    l_len;
 138         compat_pid_t    l_pid;
 139 };
 140
 141 #define F_GETLK64       12
 142 #define F_SETLK64       13
 143 #define F_SETLKW64      14
 144
 145 struct compat_flock64 {
 146         short           l_type;
 147         short           l_whence;
 148         compat_loff_t   l_start;
 149         compat_loff_t   l_len;
 150         compat_pid_t    l_pid;
 151 };
 152
 153 struct compat_statfs {
 154         u32             f_type;
 155         u32             f_bsize;
 156         u32             f_blocks;
 157         u32             f_bfree;
 158         u32             f_bavail;
 159         u32             f_files;
 160         u32             f_ffree;
 161         compat_fsid_t   f_fsid;
 162         u32             f_namelen;
 163         u32             f_frsize;
 164         u32             f_flags;
 165         u32             f_spare[4];
 166 };
 167
 168 struct compat_statfs64 {
 169         u32             f_type;
 170         u32             f_bsize;
 171         u64             f_blocks;
 172         u64             f_bfree;
 173         u64             f_bavail;
 174         u64             f_files;
 175         u64             f_ffree;
 176         compat_fsid_t   f_fsid;
 177         u32             f_namelen;
 178         u32             f_frsize;
 179         u32             f_flags;
 180         u32             f_spare[4];
 181 };
 182
 183 #define COMPAT_RLIM_INFINITY            0xffffffff
 184
 185 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 186
 187 #define _COMPAT_NSIG            64
 188 #define _COMPAT_NSIG_BPW        32
 189
 190 typedef u32             compat_sigset_word;
 191
 192 typedef union compat_sigval {
 193         compat_int_t    sival_int;
 194         compat_uptr_t   sival_ptr;
 195 } compat_sigval_t;
 196
 197 typedef struct compat_siginfo {
 198         int     si_signo;
 199         int     si_errno;
 200         int     si_code;
 201
 202         union {
 203                 int _pad[128/sizeof(int) - 3];
 204
 205                 /* kill() */
 206                 struct {
 207                         pid_t   _pid;   /* sender's pid */
 208                         uid_t   _uid;   /* sender's uid */
 209                 } _kill;
 210
 211                 /* POSIX.1b timers */
 212                 struct {
 213                         compat_timer_t _tid;            /* timer id */
 214                         int _overrun;                   /* overrun count */
 215                         compat_sigval_t _sigval;        /* same as below */
 216                         int _sys_private;       /* not to be passed to user */
 217                 } _timer;
 218
 219                 /* POSIX.1b signals */
 220                 struct {
 221                         pid_t                   _pid;   /* sender's pid */
 222                         uid_t                   _uid;   /* sender's uid */
 223                         compat_sigval_t         _sigval;
 224                 } _rt;
 225
 226                 /* SIGCHLD */
 227                 struct {
 228                         pid_t                   _pid;   /* which child */
 229                         uid_t                   _uid;   /* sender's uid */
 230                         int                     _status;/* exit code */
 231                         compat_clock_t          _utime;
 232                         compat_clock_t          _stime;
 233                 } _sigchld;
 234
 235                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
 236                 struct {
 237                         __u32   _addr;  /* faulting insn/memory ref. - pointer */
 238                 } _sigfault;
 239
 240                 /* SIGPOLL */
 241                 struct {
 242                         int     _band;  /* POLL_IN, POLL_OUT, POLL_MSG */
 243                         int     _fd;
 244                 } _sigpoll;
 245         } _sifields;
 246 } compat_siginfo_t;
 247
 248 /*
 249  * How these fields are to be accessed.
 250  */
 251 #define si_pid          _sifields._kill._pid
 252 #define si_uid          _sifields._kill._uid
 253 #define si_status       _sifields._sigchld._status
 254 #define si_utime        _sifields._sigchld._utime
 255 #define si_stime        _sifields._sigchld._stime
 256 #define si_value        _sifields._rt._sigval
 257 #define si_int          _sifields._rt._sigval.sival_int
 258 #define si_ptr          _sifields._rt._sigval.sival_ptr
 259 #define si_addr         _sifields._sigfault._addr
 260 #define si_band         _sifields._sigpoll._band
 261 #define si_fd           _sifields._sigpoll._fd
 262 #define si_tid          _sifields._timer._tid
 263 #define si_overrun      _sifields._timer._overrun
 264
 265 #define COMPAT_OFF_T_MAX        0x7fffffff
 266 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 267
 268 /*
 269  * A pointer passed in from user mode. This should not
 270  * be used for syscall parameters, just declare them
 271  * as pointers because the syscall entry code will have
 272  * appropriately converted them already.
 273  */
 274
 275 static inline void __user *compat_ptr(compat_uptr_t uptr)
 276 {
 277         return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
 278 }
 279
 280 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 281 {
 282         return (u32)(unsigned long)uptr;
 283 }
 284
 285 #ifdef CONFIG_COMPAT
 286
 287 static inline int is_compat_task(void)
 288 {
 289         return test_thread_flag(TIF_31BIT);
 290 }
 291
 292 static inline void __user *arch_compat_alloc_user_space(long len)
 293 {
 294         unsigned long stack;
 295
 296         stack = KSTK_ESP(current);
 297         if (is_compat_task())
 298                 stack &= 0x7fffffffUL;
 299         return (void __user *) (stack - len);
 300 }
 301
 302 #endif
 303
 304 struct compat_ipc64_perm {
 305         compat_key_t key;
 306         __compat_uid32_t uid;
 307         __compat_gid32_t gid;
 308         __compat_uid32_t cuid;
 309         __compat_gid32_t cgid;
 310         compat_mode_t mode;
 311         unsigned short __pad1;
 312         unsigned short seq;
 313         unsigned short __pad2;
 314         unsigned int __unused1;
 315         unsigned int __unused2;
 316 };
 317
 318 struct compat_semid64_ds {
 319         struct compat_ipc64_perm sem_perm;
 320         compat_time_t  sem_otime;
 321         compat_ulong_t __pad1;
 322         compat_time_t  sem_ctime;
 323         compat_ulong_t __pad2;
 324         compat_ulong_t sem_nsems;
 325         compat_ulong_t __unused1;
 326         compat_ulong_t __unused2;
 327 };
 328
 329 struct compat_msqid64_ds {
 330         struct compat_ipc64_perm msg_perm;
 331         compat_time_t   msg_stime;
 332         compat_ulong_t __pad1;
 333         compat_time_t   msg_rtime;
 334         compat_ulong_t __pad2;
 335         compat_time_t   msg_ctime;
 336         compat_ulong_t __pad3;
 337         compat_ulong_t msg_cbytes;
 338         compat_ulong_t msg_qnum;
 339         compat_ulong_t msg_qbytes;
 340         compat_pid_t   msg_lspid;
 341         compat_pid_t   msg_lrpid;
 342         compat_ulong_t __unused1;
 343         compat_ulong_t __unused2;
 344 };
 345
 346 struct compat_shmid64_ds {
 347         struct compat_ipc64_perm shm_perm;
 348         compat_size_t  shm_segsz;
 349         compat_time_t  shm_atime;
 350         compat_ulong_t __pad1;
 351         compat_time_t  shm_dtime;
 352         compat_ulong_t __pad2;
 353         compat_time_t  shm_ctime;
 354         compat_ulong_t __pad3;
 355         compat_pid_t   shm_cpid;
 356         compat_pid_t   shm_lpid;
 357         compat_ulong_t shm_nattch;
 358         compat_ulong_t __unused1;
 359         compat_ulong_t __unused2;
 360 };
 361 #endif /* _ASM_S390X_COMPAT_H */