arch/tile/include/asm/compat.h

   1 /*
   2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful, but
   9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11  *   NON INFRINGEMENT.  See the GNU General Public License for
  12  *   more details.
  13  */
  14
  15 #ifndef _ASM_TILE_COMPAT_H
  16 #define _ASM_TILE_COMPAT_H
  17
  18 /*
  19  * Architecture specific compatibility types
  20  */
  21 #include <linux/types.h>
  22 #include <linux/sched.h>
  23
  24 #define COMPAT_USER_HZ  100
  25
  26 /* "long" and pointer-based types are different. */
  27 typedef s32             compat_long_t;
  28 typedef u32             compat_ulong_t;
  29 typedef u32             compat_size_t;
  30 typedef s32             compat_ssize_t;
  31 typedef s32             compat_off_t;
  32 typedef s32             compat_time_t;
  33 typedef s32             compat_clock_t;
  34 typedef u32             compat_ino_t;
  35 typedef u32             compat_caddr_t;
  36 typedef u32             compat_uptr_t;
  37
  38 /* Many types are "int" or otherwise the same. */
  39 typedef __kernel_pid_t compat_pid_t;
  40 typedef __kernel_uid_t __compat_uid_t;
  41 typedef __kernel_gid_t __compat_gid_t;
  42 typedef __kernel_uid32_t __compat_uid32_t;
  43 typedef __kernel_uid32_t __compat_gid32_t;
  44 typedef __kernel_mode_t compat_mode_t;
  45 typedef __kernel_dev_t compat_dev_t;
  46 typedef __kernel_loff_t compat_loff_t;
  47 typedef __kernel_ipc_pid_t compat_ipc_pid_t;
  48 typedef __kernel_daddr_t compat_daddr_t;
  49 typedef __kernel_fsid_t compat_fsid_t;
  50 typedef __kernel_timer_t compat_timer_t;
  51 typedef __kernel_key_t compat_key_t;
  52 typedef int compat_int_t;
  53 typedef s64 compat_s64;
  54 typedef uint compat_uint_t;
  55 typedef u64 compat_u64;
  56
  57 /* We use the same register dump format in 32-bit images. */
  58 typedef unsigned long compat_elf_greg_t;
  59 #define COMPAT_ELF_NGREG (sizeof(struct pt_regs) / sizeof(compat_elf_greg_t))
  60 typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
  61
  62 struct compat_timespec {
  63         compat_time_t   tv_sec;
  64         s32             tv_nsec;
  65 };
  66
  67 struct compat_timeval {
  68         compat_time_t   tv_sec;
  69         s32             tv_usec;
  70 };
  71
  72 #define compat_stat stat
  73 #define compat_statfs statfs
  74
  75 struct compat_sysctl {
  76         unsigned int    name;
  77         int             nlen;
  78         unsigned int    oldval;
  79         unsigned int    oldlenp;
  80         unsigned int    newval;
  81         unsigned int    newlen;
  82         unsigned int    __unused[4];
  83 };
  84
  85
  86 struct compat_flock {
  87         short           l_type;
  88         short           l_whence;
  89         compat_off_t    l_start;
  90         compat_off_t    l_len;
  91         compat_pid_t    l_pid;
  92 };
  93
  94 #define F_GETLK64       12      /*  using 'struct flock64' */
  95 #define F_SETLK64       13
  96 #define F_SETLKW64      14
  97
  98 struct compat_flock64 {
  99         short           l_type;
 100         short           l_whence;
 101         compat_loff_t   l_start;
 102         compat_loff_t   l_len;
 103         compat_pid_t    l_pid;
 104 };
 105
 106 #define COMPAT_RLIM_INFINITY            0xffffffff
 107
 108 #define _COMPAT_NSIG            64
 109 #define _COMPAT_NSIG_BPW        32
 110
 111 typedef u32               compat_sigset_word;
 112
 113 typedef union compat_sigval {
 114         compat_int_t    sival_int;
 115         compat_uptr_t   sival_ptr;
 116 } compat_sigval_t;
 117
 118 #define COMPAT_SI_PAD_SIZE      (128/sizeof(int) - 3)
 119
 120 typedef struct compat_siginfo {
 121         int si_signo;
 122         int si_errno;
 123         int si_code;
 124
 125         union {
 126                 int _pad[COMPAT_SI_PAD_SIZE];
 127
 128                 /* kill() */
 129                 struct {
 130                         unsigned int _pid;      /* sender's pid */
 131                         unsigned int _uid;      /* sender's uid */
 132                 } _kill;
 133
 134                 /* POSIX.1b timers */
 135                 struct {
 136                         compat_timer_t _tid;    /* timer id */
 137                         int _overrun;           /* overrun count */
 138                         compat_sigval_t _sigval;        /* same as below */
 139                         int _sys_private;       /* not to be passed to user */
 140                         int _overrun_incr;      /* amount to add to overrun */
 141                 } _timer;
 142
 143                 /* POSIX.1b signals */
 144                 struct {
 145                         unsigned int _pid;      /* sender's pid */
 146                         unsigned int _uid;      /* sender's uid */
 147                         compat_sigval_t _sigval;
 148                 } _rt;
 149
 150                 /* SIGCHLD */
 151                 struct {
 152                         unsigned int _pid;      /* which child */
 153                         unsigned int _uid;      /* sender's uid */
 154                         int _status;            /* exit code */
 155                         compat_clock_t _utime;
 156                         compat_clock_t _stime;
 157                 } _sigchld;
 158
 159                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
 160                 struct {
 161                         unsigned int _addr;     /* faulting insn/memory ref. */
 162 #ifdef __ARCH_SI_TRAPNO
 163                         int _trapno;    /* TRAP # which caused the signal */
 164 #endif
 165                 } _sigfault;
 166
 167                 /* SIGPOLL */
 168                 struct {
 169                         int _band;      /* POLL_IN, POLL_OUT, POLL_MSG */
 170                         int _fd;
 171                 } _sigpoll;
 172         } _sifields;
 173 } compat_siginfo_t;
 174
 175 #define COMPAT_OFF_T_MAX        0x7fffffff
 176 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 177
 178 struct compat_ipc64_perm {
 179         compat_key_t key;
 180         __compat_uid32_t uid;
 181         __compat_gid32_t gid;
 182         __compat_uid32_t cuid;
 183         __compat_gid32_t cgid;
 184         unsigned short mode;
 185         unsigned short __pad1;
 186         unsigned short seq;
 187         unsigned short __pad2;
 188         compat_ulong_t unused1;
 189         compat_ulong_t unused2;
 190 };
 191
 192 struct compat_semid64_ds {
 193         struct compat_ipc64_perm sem_perm;
 194         compat_time_t  sem_otime;
 195         compat_ulong_t __unused1;
 196         compat_time_t  sem_ctime;
 197         compat_ulong_t __unused2;
 198         compat_ulong_t sem_nsems;
 199         compat_ulong_t __unused3;
 200         compat_ulong_t __unused4;
 201 };
 202
 203 struct compat_msqid64_ds {
 204         struct compat_ipc64_perm msg_perm;
 205         compat_time_t  msg_stime;
 206         compat_ulong_t __unused1;
 207         compat_time_t  msg_rtime;
 208         compat_ulong_t __unused2;
 209         compat_time_t  msg_ctime;
 210         compat_ulong_t __unused3;
 211         compat_ulong_t msg_cbytes;
 212         compat_ulong_t msg_qnum;
 213         compat_ulong_t msg_qbytes;
 214         compat_pid_t   msg_lspid;
 215         compat_pid_t   msg_lrpid;
 216         compat_ulong_t __unused4;
 217         compat_ulong_t __unused5;
 218 };
 219
 220 struct compat_shmid64_ds {
 221         struct compat_ipc64_perm shm_perm;
 222         compat_size_t  shm_segsz;
 223         compat_time_t  shm_atime;
 224         compat_ulong_t __unused1;
 225         compat_time_t  shm_dtime;
 226         compat_ulong_t __unused2;
 227         compat_time_t  shm_ctime;
 228         compat_ulong_t __unused3;
 229         compat_pid_t   shm_cpid;
 230         compat_pid_t   shm_lpid;
 231         compat_ulong_t shm_nattch;
 232         compat_ulong_t __unused4;
 233         compat_ulong_t __unused5;
 234 };
 235
 236 /*
 237  * A pointer passed in from user mode. This should not
 238  * be used for syscall parameters, just declare them
 239  * as pointers because the syscall entry code will have
 240  * appropriately converted them already.
 241  */
 242
 243 static inline void __user *compat_ptr(compat_uptr_t uptr)
 244 {
 245         return (void __user *)(long)(s32)uptr;
 246 }
 247
 248 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 249 {
 250         return (u32)(unsigned long)uptr;
 251 }
 252
 253 /* Sign-extend when storing a kernel pointer to a user's ptregs. */
 254 static inline unsigned long ptr_to_compat_reg(void __user *uptr)
 255 {
 256         return (long)(int)(long __force)uptr;
 257 }
 258
 259 static inline void __user *arch_compat_alloc_user_space(long len)
 260 {
 261         struct pt_regs *regs = task_pt_regs(current);
 262         return (void __user *)regs->sp - len;
 263 }
 264
 265 static inline int is_compat_task(void)
 266 {
 267         return current_thread_info()->status & TS_COMPAT;
 268 }
 269
 270 extern int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set,
 271                                  struct pt_regs *regs);
 272
 273 /* Compat syscalls. */
 274 struct compat_siginfo;
 275 struct compat_sigaltstack;
 276 long compat_sys_rt_sigreturn(void);
 277 long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high);
 278 long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high);
 279 long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count,
 280                         u32 dummy, u32 low, u32 high);
 281 long compat_sys_pwrite64(unsigned int fd, char __user *ubuf, size_t count,
 282                          u32 dummy, u32 low, u32 high);
 283 long compat_sys_sync_file_range2(int fd, unsigned int flags,
 284                                  u32 offset_lo, u32 offset_hi,
 285                                  u32 nbytes_lo, u32 nbytes_hi);
 286 long compat_sys_fallocate(int fd, int mode,
 287                           u32 offset_lo, u32 offset_hi,
 288                           u32 len_lo, u32 len_hi);
 289 long compat_sys_llseek(unsigned int fd, unsigned int offset_high,
 290                        unsigned int offset_low, loff_t __user * result,
 291                        unsigned int origin);
 292
 293 /* Assembly trampoline to avoid clobbering r0. */
 294 long _compat_sys_rt_sigreturn(void);
 295
 296 #endif /* _ASM_TILE_COMPAT_H */