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 #define COMPAT_OFF_T_MAX        0x7fffffff
 114
 115 struct compat_ipc64_perm {
 116         compat_key_t key;
 117         __compat_uid32_t uid;
 118         __compat_gid32_t gid;
 119         __compat_uid32_t cuid;
 120         __compat_gid32_t cgid;
 121         unsigned short mode;
 122         unsigned short __pad1;
 123         unsigned short seq;
 124         unsigned short __pad2;
 125         compat_ulong_t unused1;
 126         compat_ulong_t unused2;
 127 };
 128
 129 struct compat_semid64_ds {
 130         struct compat_ipc64_perm sem_perm;
 131         compat_time_t  sem_otime;
 132         compat_ulong_t __unused1;
 133         compat_time_t  sem_ctime;
 134         compat_ulong_t __unused2;
 135         compat_ulong_t sem_nsems;
 136         compat_ulong_t __unused3;
 137         compat_ulong_t __unused4;
 138 };
 139
 140 struct compat_msqid64_ds {
 141         struct compat_ipc64_perm msg_perm;
 142         compat_time_t  msg_stime;
 143         compat_ulong_t __unused1;
 144         compat_time_t  msg_rtime;
 145         compat_ulong_t __unused2;
 146         compat_time_t  msg_ctime;
 147         compat_ulong_t __unused3;
 148         compat_ulong_t msg_cbytes;
 149         compat_ulong_t msg_qnum;
 150         compat_ulong_t msg_qbytes;
 151         compat_pid_t   msg_lspid;
 152         compat_pid_t   msg_lrpid;
 153         compat_ulong_t __unused4;
 154         compat_ulong_t __unused5;
 155 };
 156
 157 struct compat_shmid64_ds {
 158         struct compat_ipc64_perm shm_perm;
 159         compat_size_t  shm_segsz;
 160         compat_time_t  shm_atime;
 161         compat_ulong_t __unused1;
 162         compat_time_t  shm_dtime;
 163         compat_ulong_t __unused2;
 164         compat_time_t  shm_ctime;
 165         compat_ulong_t __unused3;
 166         compat_pid_t   shm_cpid;
 167         compat_pid_t   shm_lpid;
 168         compat_ulong_t shm_nattch;
 169         compat_ulong_t __unused4;
 170         compat_ulong_t __unused5;
 171 };
 172
 173 /*
 174  * A pointer passed in from user mode. This should not
 175  * be used for syscall parameters, just declare them
 176  * as pointers because the syscall entry code will have
 177  * appropriately converted them already.
 178  */
 179
 180 static inline void __user *compat_ptr(compat_uptr_t uptr)
 181 {
 182         return (void __user *)(long)(s32)uptr;
 183 }
 184
 185 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 186 {
 187         return (u32)(unsigned long)uptr;
 188 }
 189
 190 /* Sign-extend when storing a kernel pointer to a user's ptregs. */
 191 static inline unsigned long ptr_to_compat_reg(void __user *uptr)
 192 {
 193         return (long)(int)(long __force)uptr;
 194 }
 195
 196 static inline void __user *arch_compat_alloc_user_space(long len)
 197 {
 198         struct pt_regs *regs = task_pt_regs(current);
 199         return (void __user *)regs->sp - len;
 200 }
 201
 202 static inline int is_compat_task(void)
 203 {
 204         return current_thread_info()->status & TS_COMPAT;
 205 }
 206
 207 extern int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set,
 208                                  struct pt_regs *regs);
 209
 210 /* Compat syscalls. */
 211 struct compat_siginfo;
 212 struct compat_sigaltstack;
 213 long compat_sys_rt_sigreturn(void);
 214 long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high);
 215 long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high);
 216 long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count,
 217                         u32 dummy, u32 low, u32 high);
 218 long compat_sys_pwrite64(unsigned int fd, char __user *ubuf, size_t count,
 219                          u32 dummy, u32 low, u32 high);
 220 long compat_sys_sync_file_range2(int fd, unsigned int flags,
 221                                  u32 offset_lo, u32 offset_hi,
 222                                  u32 nbytes_lo, u32 nbytes_hi);
 223 long compat_sys_fallocate(int fd, int mode,
 224                           u32 offset_lo, u32 offset_hi,
 225                           u32 len_lo, u32 len_hi);
 226 long compat_sys_llseek(unsigned int fd, unsigned int offset_high,
 227                        unsigned int offset_low, loff_t __user * result,
 228                        unsigned int origin);
 229
 230 /* Assembly trampoline to avoid clobbering r0. */
 231 long _compat_sys_rt_sigreturn(void);
 232
 233 #endif /* _ASM_TILE_COMPAT_H */