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 u16             __compat_uid_t;
  37 typedef u16             __compat_gid_t;
  38 typedef u16             __compat_uid16_t;
  39 typedef u16             __compat_gid16_t;
  40 typedef u32             __compat_uid32_t;
  41 typedef u32             __compat_gid32_t;
  42 typedef u16             compat_mode_t;
  43 typedef u32             compat_ino_t;
  44 typedef u32             compat_dev_t;
  45 typedef s32             compat_off_t;
  46 typedef s64             compat_loff_t;
  47 typedef s32             compat_nlink_t;
  48 typedef u16             compat_ipc_pid_t;
  49 typedef s32             compat_daddr_t;
  50 typedef u32             compat_caddr_t;
  51 typedef __kernel_fsid_t compat_fsid_t;
  52 typedef s32             compat_key_t;
  53 typedef s32             compat_timer_t;
  54
  55 typedef s16             compat_short_t;
  56 typedef s32             compat_int_t;
  57 typedef s32             compat_long_t;
  58 typedef s64             compat_s64;
  59 typedef u16             compat_ushort_t;
  60 typedef u32             compat_uint_t;
  61 typedef u32             compat_ulong_t;
  62 typedef u64             compat_u64;
  63 typedef u32             compat_uptr_t;
  64
  65 struct compat_timespec {
  66         compat_time_t   tv_sec;
  67         s32             tv_nsec;
  68 };
  69
  70 struct compat_timeval {
  71         compat_time_t   tv_sec;
  72         s32             tv_usec;
  73 };
  74
  75 struct compat_stat {
  76         compat_dev_t    st_dev;
  77         compat_ino_t    st_ino;
  78         compat_mode_t   st_mode;
  79         compat_ushort_t st_nlink;
  80         __compat_uid16_t        st_uid;
  81         __compat_gid16_t        st_gid;
  82         compat_dev_t    st_rdev;
  83         compat_off_t    st_size;
  84         compat_off_t    st_blksize;
  85         compat_off_t    st_blocks;
  86         compat_time_t   st_atime;
  87         compat_ulong_t  st_atime_nsec;
  88         compat_time_t   st_mtime;
  89         compat_ulong_t  st_mtime_nsec;
  90         compat_time_t   st_ctime;
  91         compat_ulong_t  st_ctime_nsec;
  92         compat_ulong_t  __unused4[2];
  93 };
  94
  95 struct compat_flock {
  96         short           l_type;
  97         short           l_whence;
  98         compat_off_t    l_start;
  99         compat_off_t    l_len;
 100         compat_pid_t    l_pid;
 101 };
 102
 103 #define F_GETLK64       12      /*  using 'struct flock64' */
 104 #define F_SETLK64       13
 105 #define F_SETLKW64      14
 106
 107 struct compat_flock64 {
 108         short           l_type;
 109         short           l_whence;
 110         compat_loff_t   l_start;
 111         compat_loff_t   l_len;
 112         compat_pid_t    l_pid;
 113 };
 114
 115 struct compat_statfs {
 116         int             f_type;
 117         int             f_bsize;
 118         int             f_blocks;
 119         int             f_bfree;
 120         int             f_bavail;
 121         int             f_files;
 122         int             f_ffree;
 123         compat_fsid_t   f_fsid;
 124         int             f_namelen;      /* SunOS ignores this field. */
 125         int             f_frsize;
 126         int             f_flags;
 127         int             f_spare[4];
 128 };
 129
 130 #define COMPAT_RLIM_INFINITY            0xffffffff
 131
 132 typedef u32             compat_old_sigset_t;
 133
 134 #define _COMPAT_NSIG            64
 135 #define _COMPAT_NSIG_BPW        32
 136
 137 typedef u32             compat_sigset_word;
 138
 139 typedef union compat_sigval {
 140         compat_int_t    sival_int;
 141         compat_uptr_t   sival_ptr;
 142 } compat_sigval_t;
 143
 144 typedef struct compat_siginfo {
 145         int si_signo;
 146         int si_errno;
 147         int si_code;
 148
 149         union {
 150                 /* The padding is the same size as AArch64. */
 151                 int _pad[128/sizeof(int) - 3];
 152
 153                 /* kill() */
 154                 struct {
 155                         compat_pid_t _pid;      /* sender's pid */
 156                         __compat_uid32_t _uid;  /* sender's uid */
 157                 } _kill;
 158
 159                 /* POSIX.1b timers */
 160                 struct {
 161                         compat_timer_t _tid;    /* timer id */
 162                         int _overrun;           /* overrun count */
 163                         compat_sigval_t _sigval;        /* same as below */
 164                         int _sys_private;       /* not to be passed to user */
 165                 } _timer;
 166
 167                 /* POSIX.1b signals */
 168                 struct {
 169                         compat_pid_t _pid;      /* sender's pid */
 170                         __compat_uid32_t _uid;  /* sender's uid */
 171                         compat_sigval_t _sigval;
 172                 } _rt;
 173
 174                 /* SIGCHLD */
 175                 struct {
 176                         compat_pid_t _pid;      /* which child */
 177                         __compat_uid32_t _uid;  /* sender's uid */
 178                         int _status;            /* exit code */
 179                         compat_clock_t _utime;
 180                         compat_clock_t _stime;
 181                 } _sigchld;
 182
 183                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
 184                 struct {
 185                         compat_uptr_t _addr; /* faulting insn/memory ref. */
 186                         short _addr_lsb; /* LSB of the reported address */
 187                 } _sigfault;
 188
 189                 /* SIGPOLL */
 190                 struct {
 191                         compat_long_t _band;    /* POLL_IN, POLL_OUT, POLL_MSG */
 192                         int _fd;
 193                 } _sigpoll;
 194
 195                 /* SIGSYS */
 196                 struct {
 197                         compat_uptr_t _call_addr; /* calling user insn */
 198                         int _syscall;   /* triggering system call number */
 199                         unsigned int _arch;     /* AUDIT_ARCH_* of syscall */
 200                 } _sigsys;
 201         } _sifields;
 202 } compat_siginfo_t;
 203
 204 #define COMPAT_OFF_T_MAX        0x7fffffff
 205 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 206
 207 /*
 208  * A pointer passed in from user mode. This should not
 209  * be used for syscall parameters, just declare them
 210  * as pointers because the syscall entry code will have
 211  * appropriately converted them already.
 212  */
 213
 214 static inline void __user *compat_ptr(compat_uptr_t uptr)
 215 {
 216         return (void __user *)(unsigned long)uptr;
 217 }
 218
 219 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 220 {
 221         return (u32)(unsigned long)uptr;
 222 }
 223
 224 #define compat_user_stack_pointer() (user_stack_pointer(current_pt_regs()))
 225
 226 static inline void __user *arch_compat_alloc_user_space(long len)
 227 {
 228         return (void __user *)compat_user_stack_pointer() - len;
 229 }
 230
 231 struct compat_ipc64_perm {
 232         compat_key_t key;
 233         __compat_uid32_t uid;
 234         __compat_gid32_t gid;
 235         __compat_uid32_t cuid;
 236         __compat_gid32_t cgid;
 237         unsigned short mode;
 238         unsigned short __pad1;
 239         unsigned short seq;
 240         unsigned short __pad2;
 241         compat_ulong_t unused1;
 242         compat_ulong_t unused2;
 243 };
 244
 245 struct compat_semid64_ds {
 246         struct compat_ipc64_perm sem_perm;
 247         compat_time_t  sem_otime;
 248         compat_ulong_t __unused1;
 249         compat_time_t  sem_ctime;
 250         compat_ulong_t __unused2;
 251         compat_ulong_t sem_nsems;
 252         compat_ulong_t __unused3;
 253         compat_ulong_t __unused4;
 254 };
 255
 256 struct compat_msqid64_ds {
 257         struct compat_ipc64_perm msg_perm;
 258         compat_time_t  msg_stime;
 259         compat_ulong_t __unused1;
 260         compat_time_t  msg_rtime;
 261         compat_ulong_t __unused2;
 262         compat_time_t  msg_ctime;
 263         compat_ulong_t __unused3;
 264         compat_ulong_t msg_cbytes;
 265         compat_ulong_t msg_qnum;
 266         compat_ulong_t msg_qbytes;
 267         compat_pid_t   msg_lspid;
 268         compat_pid_t   msg_lrpid;
 269         compat_ulong_t __unused4;
 270         compat_ulong_t __unused5;
 271 };
 272
 273 struct compat_shmid64_ds {
 274         struct compat_ipc64_perm shm_perm;
 275         compat_size_t  shm_segsz;
 276         compat_time_t  shm_atime;
 277         compat_ulong_t __unused1;
 278         compat_time_t  shm_dtime;
 279         compat_ulong_t __unused2;
 280         compat_time_t  shm_ctime;
 281         compat_ulong_t __unused3;
 282         compat_pid_t   shm_cpid;
 283         compat_pid_t   shm_lpid;
 284         compat_ulong_t shm_nattch;
 285         compat_ulong_t __unused4;
 286         compat_ulong_t __unused5;
 287 };
 288
 289 static inline int is_compat_task(void)
 290 {
 291         return test_thread_flag(TIF_32BIT);
 292 }
 293
 294 static inline int is_compat_thread(struct thread_info *thread)
 295 {
 296         return test_ti_thread_flag(thread, TIF_32BIT);
 297 }
 298
 299 #else /* !CONFIG_COMPAT */
 300
 301 static inline int is_compat_thread(struct thread_info *thread)
 302 {
 303         return 0;
 304 }
 305
 306 #endif /* CONFIG_COMPAT */
 307 #endif /* __KERNEL__ */
 308 #endif /* __ASM_COMPAT_H */