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 #include <linux/ptrace.h>
  27
  28 #define COMPAT_USER_HZ          100
  29 #define COMPAT_UTS_MACHINE      "armv8l\0\0"
  30
  31 typedef u32             compat_size_t;
  32 typedef s32             compat_ssize_t;
  33 typedef s32             compat_time_t;
  34 typedef s32             compat_clock_t;
  35 typedef s32             compat_pid_t;
  36 typedef u32             __compat_uid_t;
  37 typedef u32             __compat_gid_t;
  38 typedef u32             __compat_uid32_t;
  39 typedef u32             __compat_gid32_t;
  40 typedef u32             compat_mode_t;
  41 typedef u32             compat_ino_t;
  42 typedef u32             compat_dev_t;
  43 typedef s32             compat_off_t;
  44 typedef s64             compat_loff_t;
  45 typedef s16             compat_nlink_t;
  46 typedef u16             compat_ipc_pid_t;
  47 typedef s32             compat_daddr_t;
  48 typedef u32             compat_caddr_t;
  49 typedef __kernel_fsid_t compat_fsid_t;
  50 typedef s32             compat_key_t;
  51 typedef s32             compat_timer_t;
  52
  53 typedef s32             compat_int_t;
  54 typedef s32             compat_long_t;
  55 typedef s64             compat_s64;
  56 typedef u32             compat_uint_t;
  57 typedef u32             compat_ulong_t;
  58 typedef u64             compat_u64;
  59 typedef u32             compat_uptr_t;
  60
  61 struct compat_timespec {
  62         compat_time_t   tv_sec;
  63         s32             tv_nsec;
  64 };
  65
  66 struct compat_timeval {
  67         compat_time_t   tv_sec;
  68         s32             tv_usec;
  69 };
  70
  71 struct compat_stat {
  72         compat_dev_t    st_dev;
  73         compat_ino_t    st_ino;
  74         compat_mode_t   st_mode;
  75         compat_nlink_t  st_nlink;
  76         __compat_uid32_t        st_uid;
  77         __compat_gid32_t        st_gid;
  78         compat_dev_t    st_rdev;
  79         compat_off_t    st_size;
  80         compat_off_t    st_blksize;
  81         compat_off_t    st_blocks;
  82         compat_time_t   st_atime;
  83         u32             st_atime_nsec;
  84         compat_time_t   st_mtime;
  85         u32             st_mtime_nsec;
  86         compat_time_t   st_ctime;
  87         u32             st_ctime_nsec;
  88         u32             __unused4[2];
  89 };
  90
  91 struct compat_flock {
  92         short           l_type;
  93         short           l_whence;
  94         compat_off_t    l_start;
  95         compat_off_t    l_len;
  96         compat_pid_t    l_pid;
  97 };
  98
  99 #define F_GETLK64       12      /*  using 'struct flock64' */
 100 #define F_SETLK64       13
 101 #define F_SETLKW64      14
 102
 103 struct compat_flock64 {
 104         short           l_type;
 105         short           l_whence;
 106         compat_loff_t   l_start;
 107         compat_loff_t   l_len;
 108         compat_pid_t    l_pid;
 109 };
 110
 111 struct compat_statfs {
 112         int             f_type;
 113         int             f_bsize;
 114         int             f_blocks;
 115         int             f_bfree;
 116         int             f_bavail;
 117         int             f_files;
 118         int             f_ffree;
 119         compat_fsid_t   f_fsid;
 120         int             f_namelen;      /* SunOS ignores this field. */
 121         int             f_frsize;
 122         int             f_flags;
 123         int             f_spare[4];
 124 };
 125
 126 #define COMPAT_RLIM_INFINITY            0xffffffff
 127
 128 typedef u32             compat_old_sigset_t;
 129
 130 #define _COMPAT_NSIG            64
 131 #define _COMPAT_NSIG_BPW        32
 132
 133 typedef u32             compat_sigset_word;
 134
 135 typedef union compat_sigval {
 136         compat_int_t    sival_int;
 137         compat_uptr_t   sival_ptr;
 138 } compat_sigval_t;
 139
 140 typedef struct compat_siginfo {
 141         int si_signo;
 142         int si_errno;
 143         int si_code;
 144
 145         union {
 146                 /* The padding is the same size as AArch64. */
 147                 int _pad[128/sizeof(int) - 3];
 148
 149                 /* kill() */
 150                 struct {
 151                         compat_pid_t _pid;      /* sender's pid */
 152                         __compat_uid32_t _uid;  /* sender's uid */
 153                 } _kill;
 154
 155                 /* POSIX.1b timers */
 156                 struct {
 157                         compat_timer_t _tid;    /* timer id */
 158                         int _overrun;           /* overrun count */
 159                         compat_sigval_t _sigval;        /* same as below */
 160                         int _sys_private;       /* not to be passed to user */
 161                 } _timer;
 162
 163                 /* POSIX.1b signals */
 164                 struct {
 165                         compat_pid_t _pid;      /* sender's pid */
 166                         __compat_uid32_t _uid;  /* sender's uid */
 167                         compat_sigval_t _sigval;
 168                 } _rt;
 169
 170                 /* SIGCHLD */
 171                 struct {
 172                         compat_pid_t _pid;      /* which child */
 173                         __compat_uid32_t _uid;  /* sender's uid */
 174                         int _status;            /* exit code */
 175                         compat_clock_t _utime;
 176                         compat_clock_t _stime;
 177                 } _sigchld;
 178
 179                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
 180                 struct {
 181                         compat_uptr_t _addr; /* faulting insn/memory ref. */
 182                         short _addr_lsb; /* LSB of the reported address */
 183                 } _sigfault;
 184
 185                 /* SIGPOLL */
 186                 struct {
 187                         compat_long_t _band;    /* POLL_IN, POLL_OUT, POLL_MSG */
 188                         int _fd;
 189                 } _sigpoll;
 190         } _sifields;
 191 } compat_siginfo_t;
 192
 193 #define COMPAT_OFF_T_MAX        0x7fffffff
 194 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 195
 196 /*
 197  * A pointer passed in from user mode. This should not
 198  * be used for syscall parameters, just declare them
 199  * as pointers because the syscall entry code will have
 200  * appropriately converted them already.
 201  */
 202
 203 static inline void __user *compat_ptr(compat_uptr_t uptr)
 204 {
 205         return (void __user *)(unsigned long)uptr;
 206 }
 207
 208 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 209 {
 210         return (u32)(unsigned long)uptr;
 211 }
 212
 213 #define compat_user_stack_pointer() (current_pt_regs()->compat_sp)
 214
 215 static inline void __user *arch_compat_alloc_user_space(long len)
 216 {
 217         return (void __user *)compat_user_stack_pointer() - len;
 218 }
 219
 220 struct compat_ipc64_perm {
 221         compat_key_t key;
 222         __compat_uid32_t uid;
 223         __compat_gid32_t gid;
 224         __compat_uid32_t cuid;
 225         __compat_gid32_t cgid;
 226         unsigned short mode;
 227         unsigned short __pad1;
 228         unsigned short seq;
 229         unsigned short __pad2;
 230         compat_ulong_t unused1;
 231         compat_ulong_t unused2;
 232 };
 233
 234 struct compat_semid64_ds {
 235         struct compat_ipc64_perm sem_perm;
 236         compat_time_t  sem_otime;
 237         compat_ulong_t __unused1;
 238         compat_time_t  sem_ctime;
 239         compat_ulong_t __unused2;
 240         compat_ulong_t sem_nsems;
 241         compat_ulong_t __unused3;
 242         compat_ulong_t __unused4;
 243 };
 244
 245 struct compat_msqid64_ds {
 246         struct compat_ipc64_perm msg_perm;
 247         compat_time_t  msg_stime;
 248         compat_ulong_t __unused1;
 249         compat_time_t  msg_rtime;
 250         compat_ulong_t __unused2;
 251         compat_time_t  msg_ctime;
 252         compat_ulong_t __unused3;
 253         compat_ulong_t msg_cbytes;
 254         compat_ulong_t msg_qnum;
 255         compat_ulong_t msg_qbytes;
 256         compat_pid_t   msg_lspid;
 257         compat_pid_t   msg_lrpid;
 258         compat_ulong_t __unused4;
 259         compat_ulong_t __unused5;
 260 };
 261
 262 struct compat_shmid64_ds {
 263         struct compat_ipc64_perm shm_perm;
 264         compat_size_t  shm_segsz;
 265         compat_time_t  shm_atime;
 266         compat_ulong_t __unused1;
 267         compat_time_t  shm_dtime;
 268         compat_ulong_t __unused2;
 269         compat_time_t  shm_ctime;
 270         compat_ulong_t __unused3;
 271         compat_pid_t   shm_cpid;
 272         compat_pid_t   shm_lpid;
 273         compat_ulong_t shm_nattch;
 274         compat_ulong_t __unused4;
 275         compat_ulong_t __unused5;
 276 };
 277
 278 static inline int is_compat_task(void)
 279 {
 280         return test_thread_flag(TIF_32BIT);
 281 }
 282
 283 static inline int is_compat_thread(struct thread_info *thread)
 284 {
 285         return test_ti_thread_flag(thread, TIF_32BIT);
 286 }
 287
 288 #else /* !CONFIG_COMPAT */
 289
 290 static inline int is_compat_task(void)
 291 {
 292         return 0;
 293 }
 294
 295 static inline int is_compat_thread(struct thread_info *thread)
 296 {
 297         return 0;
 298 }
 299
 300 #endif /* CONFIG_COMPAT */
 301 #endif /* __KERNEL__ */
 302 #endif /* __ASM_COMPAT_H */