arch/arm64/include/asm/compat.h

   1 /*
   2  * Copyright (C) 2012 ARM Ltd.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 #ifndef __ASM_COMPAT_H
  17 #define __ASM_COMPAT_H
  18 #ifdef __KERNEL__
  19 #ifdef CONFIG_COMPAT
  20
  21 /*
  22  * Architecture specific compatibility types
  23  */
  24 #include <linux/types.h>
  25 #include <linux/sched.h>
  26
  27 #define COMPAT_USER_HZ          100
  28 #define COMPAT_UTS_MACHINE      "armv8l\0\0"
  29
  30 typedef u32             compat_size_t;
  31 typedef s32             compat_ssize_t;
  32 typedef s32             compat_time_t;
  33 typedef s32             compat_clock_t;
  34 typedef s32             compat_pid_t;
  35 typedef u32             __compat_uid_t;
  36 typedef u32             __compat_gid_t;
  37 typedef u32             __compat_uid32_t;
  38 typedef u32             __compat_gid32_t;
  39 typedef u32             compat_mode_t;
  40 typedef u32             compat_ino_t;
  41 typedef u32             compat_dev_t;
  42 typedef s32             compat_off_t;
  43 typedef s64             compat_loff_t;
  44 typedef s16             compat_nlink_t;
  45 typedef u16             compat_ipc_pid_t;
  46 typedef s32             compat_daddr_t;
  47 typedef u32             compat_caddr_t;
  48 typedef __kernel_fsid_t compat_fsid_t;
  49 typedef s32             compat_key_t;
  50 typedef s32             compat_timer_t;
  51
  52 typedef s32             compat_int_t;
  53 typedef s32             compat_long_t;
  54 typedef s64             compat_s64;
  55 typedef u32             compat_uint_t;
  56 typedef u32             compat_ulong_t;
  57 typedef u64             compat_u64;
  58 typedef u32             compat_uptr_t;
  59
  60 struct compat_timespec {
  61         compat_time_t   tv_sec;
  62         s32             tv_nsec;
  63 };
  64
  65 struct compat_timeval {
  66         compat_time_t   tv_sec;
  67         s32             tv_usec;
  68 };
  69
  70 struct compat_stat {
  71         compat_dev_t    st_dev;
  72         compat_ino_t    st_ino;
  73         compat_mode_t   st_mode;
  74         compat_nlink_t  st_nlink;
  75         __compat_uid32_t        st_uid;
  76         __compat_gid32_t        st_gid;
  77         compat_dev_t    st_rdev;
  78         compat_off_t    st_size;
  79         compat_off_t    st_blksize;
  80         compat_off_t    st_blocks;
  81         compat_time_t   st_atime;
  82         u32             st_atime_nsec;
  83         compat_time_t   st_mtime;
  84         u32             st_mtime_nsec;
  85         compat_time_t   st_ctime;
  86         u32             st_ctime_nsec;
  87         u32             __unused4[2];
  88 };
  89
  90 struct compat_flock {
  91         short           l_type;
  92         short           l_whence;
  93         compat_off_t    l_start;
  94         compat_off_t    l_len;
  95         compat_pid_t    l_pid;
  96 };
  97
  98 #define F_GETLK64       12      /*  using 'struct flock64' */
  99 #define F_SETLK64       13
 100 #define F_SETLKW64      14
 101
 102 struct compat_flock64 {
 103         short           l_type;
 104         short           l_whence;
 105         compat_loff_t   l_start;
 106         compat_loff_t   l_len;
 107         compat_pid_t    l_pid;
 108 };
 109
 110 struct compat_statfs {
 111         int             f_type;
 112         int             f_bsize;
 113         int             f_blocks;
 114         int             f_bfree;
 115         int             f_bavail;
 116         int             f_files;
 117         int             f_ffree;
 118         compat_fsid_t   f_fsid;
 119         int             f_namelen;      /* SunOS ignores this field. */
 120         int             f_frsize;
 121         int             f_flags;
 122         int             f_spare[4];
 123 };
 124
 125 #define COMPAT_RLIM_INFINITY            0xffffffff
 126
 127 typedef u32             compat_old_sigset_t;
 128
 129 #define _COMPAT_NSIG            64
 130 #define _COMPAT_NSIG_BPW        32
 131
 132 typedef u32             compat_sigset_word;
 133
 134 typedef union compat_sigval {
 135         compat_int_t    sival_int;
 136         compat_uptr_t   sival_ptr;
 137 } compat_sigval_t;
 138
 139 typedef struct compat_siginfo {
 140         int si_signo;
 141         int si_errno;
 142         int si_code;
 143
 144         union {
 145                 /* The padding is the same size as AArch64. */
 146                 int _pad[128/sizeof(int) - 3];
 147
 148                 /* kill() */
 149                 struct {
 150                         compat_pid_t _pid;      /* sender's pid */
 151                         __compat_uid32_t _uid;  /* sender's uid */
 152                 } _kill;
 153
 154                 /* POSIX.1b timers */
 155                 struct {
 156                         compat_timer_t _tid;    /* timer id */
 157                         int _overrun;           /* overrun count */
 158                         compat_sigval_t _sigval;        /* same as below */
 159                         int _sys_private;       /* not to be passed to user */
 160                 } _timer;
 161
 162                 /* POSIX.1b signals */
 163                 struct {
 164                         compat_pid_t _pid;      /* sender's pid */
 165                         __compat_uid32_t _uid;  /* sender's uid */
 166                         compat_sigval_t _sigval;
 167                 } _rt;
 168
 169                 /* SIGCHLD */
 170                 struct {
 171                         compat_pid_t _pid;      /* which child */
 172                         __compat_uid32_t _uid;  /* sender's uid */
 173                         int _status;            /* exit code */
 174                         compat_clock_t _utime;
 175                         compat_clock_t _stime;
 176                 } _sigchld;
 177
 178                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
 179                 struct {
 180                         compat_uptr_t _addr; /* faulting insn/memory ref. */
 181                         short _addr_lsb; /* LSB of the reported address */
 182                 } _sigfault;
 183
 184                 /* SIGPOLL */
 185                 struct {
 186                         compat_long_t _band;    /* POLL_IN, POLL_OUT, POLL_MSG */
 187                         int _fd;
 188                 } _sigpoll;
 189         } _sifields;
 190 } compat_siginfo_t;
 191
 192 #define COMPAT_OFF_T_MAX        0x7fffffff
 193 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 194
 195 /*
 196  * A pointer passed in from user mode. This should not
 197  * be used for syscall parameters, just declare them
 198  * as pointers because the syscall entry code will have
 199  * appropriately converted them already.
 200  */
 201
 202 static inline void __user *compat_ptr(compat_uptr_t uptr)
 203 {
 204         return (void __user *)(unsigned long)uptr;
 205 }
 206
 207 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 208 {
 209         return (u32)(unsigned long)uptr;
 210 }
 211
 212 static inline void __user *arch_compat_alloc_user_space(long len)
 213 {
 214         struct pt_regs *regs = task_pt_regs(current);
 215         return (void __user *)regs->compat_sp - len;
 216 }
 217
 218 struct compat_ipc64_perm {
 219         compat_key_t key;
 220         __compat_uid32_t uid;
 221         __compat_gid32_t gid;
 222         __compat_uid32_t cuid;
 223         __compat_gid32_t cgid;
 224         unsigned short mode;
 225         unsigned short __pad1;
 226         unsigned short seq;
 227         unsigned short __pad2;
 228         compat_ulong_t unused1;
 229         compat_ulong_t unused2;
 230 };
 231
 232 struct compat_semid64_ds {
 233         struct compat_ipc64_perm sem_perm;
 234         compat_time_t  sem_otime;
 235         compat_ulong_t __unused1;
 236         compat_time_t  sem_ctime;
 237         compat_ulong_t __unused2;
 238         compat_ulong_t sem_nsems;
 239         compat_ulong_t __unused3;
 240         compat_ulong_t __unused4;
 241 };
 242
 243 struct compat_msqid64_ds {
 244         struct compat_ipc64_perm msg_perm;
 245         compat_time_t  msg_stime;
 246         compat_ulong_t __unused1;
 247         compat_time_t  msg_rtime;
 248         compat_ulong_t __unused2;
 249         compat_time_t  msg_ctime;
 250         compat_ulong_t __unused3;
 251         compat_ulong_t msg_cbytes;
 252         compat_ulong_t msg_qnum;
 253         compat_ulong_t msg_qbytes;
 254         compat_pid_t   msg_lspid;
 255         compat_pid_t   msg_lrpid;
 256         compat_ulong_t __unused4;
 257         compat_ulong_t __unused5;
 258 };
 259
 260 struct compat_shmid64_ds {
 261         struct compat_ipc64_perm shm_perm;
 262         compat_size_t  shm_segsz;
 263         compat_time_t  shm_atime;
 264         compat_ulong_t __unused1;
 265         compat_time_t  shm_dtime;
 266         compat_ulong_t __unused2;
 267         compat_time_t  shm_ctime;
 268         compat_ulong_t __unused3;
 269         compat_pid_t   shm_cpid;
 270         compat_pid_t   shm_lpid;
 271         compat_ulong_t shm_nattch;
 272         compat_ulong_t __unused4;
 273         compat_ulong_t __unused5;
 274 };
 275
 276 static inline int is_compat_task(void)
 277 {
 278         return test_thread_flag(TIF_32BIT);
 279 }
 280
 281 static inline int is_compat_thread(struct thread_info *thread)
 282 {
 283         return test_ti_thread_flag(thread, TIF_32BIT);
 284 }
 285
 286 #else /* !CONFIG_COMPAT */
 287
 288 static inline int is_compat_task(void)
 289 {
 290         return 0;
 291 }
 292
 293 static inline int is_compat_thread(struct thread_info *thread)
 294 {
 295         return 0;
 296 }
 297
 298 #endif /* CONFIG_COMPAT */
 299 #endif /* __KERNEL__ */
 300 #endif /* __ASM_COMPAT_H */