arch/x86/include/asm/compat.h

   1 #ifndef _ASM_X86_COMPAT_H
   2 #define _ASM_X86_COMPAT_H
   3
   4 /*
   5  * Architecture specific compatibility types
   6  */
   7 #include <linux/types.h>
   8 #include <linux/sched.h>
   9 #include <asm/user32.h>
  10
  11 #define COMPAT_USER_HZ  100
  12
  13 typedef u32             compat_size_t;
  14 typedef s32             compat_ssize_t;
  15 typedef s32             compat_time_t;
  16 typedef s32             compat_clock_t;
  17 typedef s32             compat_pid_t;
  18 typedef u16             __compat_uid_t;
  19 typedef u16             __compat_gid_t;
  20 typedef u32             __compat_uid32_t;
  21 typedef u32             __compat_gid32_t;
  22 typedef u16             compat_mode_t;
  23 typedef u32             compat_ino_t;
  24 typedef u16             compat_dev_t;
  25 typedef s32             compat_off_t;
  26 typedef s64             compat_loff_t;
  27 typedef u16             compat_nlink_t;
  28 typedef u16             compat_ipc_pid_t;
  29 typedef s32             compat_daddr_t;
  30 typedef u32             compat_caddr_t;
  31 typedef __kernel_fsid_t compat_fsid_t;
  32 typedef s32             compat_timer_t;
  33 typedef s32             compat_key_t;
  34
  35 typedef s32             compat_int_t;
  36 typedef s32             compat_long_t;
  37 typedef s64 __attribute__((aligned(4))) compat_s64;
  38 typedef u32             compat_uint_t;
  39 typedef u32             compat_ulong_t;
  40 typedef u64 __attribute__((aligned(4))) compat_u64;
  41
  42 struct compat_timespec {
  43         compat_time_t   tv_sec;
  44         s32             tv_nsec;
  45 };
  46
  47 struct compat_timeval {
  48         compat_time_t   tv_sec;
  49         s32             tv_usec;
  50 };
  51
  52 struct compat_stat {
  53         compat_dev_t    st_dev;
  54         u16             __pad1;
  55         compat_ino_t    st_ino;
  56         compat_mode_t   st_mode;
  57         compat_nlink_t  st_nlink;
  58         __compat_uid_t  st_uid;
  59         __compat_gid_t  st_gid;
  60         compat_dev_t    st_rdev;
  61         u16             __pad2;
  62         u32             st_size;
  63         u32             st_blksize;
  64         u32             st_blocks;
  65         u32             st_atime;
  66         u32             st_atime_nsec;
  67         u32             st_mtime;
  68         u32             st_mtime_nsec;
  69         u32             st_ctime;
  70         u32             st_ctime_nsec;
  71         u32             __unused4;
  72         u32             __unused5;
  73 };
  74
  75 struct compat_flock {
  76         short           l_type;
  77         short           l_whence;
  78         compat_off_t    l_start;
  79         compat_off_t    l_len;
  80         compat_pid_t    l_pid;
  81 };
  82
  83 #define F_GETLK64       12      /*  using 'struct flock64' */
  84 #define F_SETLK64       13
  85 #define F_SETLKW64      14
  86
  87 /*
  88  * IA32 uses 4 byte alignment for 64 bit quantities,
  89  * so we need to pack this structure.
  90  */
  91 struct compat_flock64 {
  92         short           l_type;
  93         short           l_whence;
  94         compat_loff_t   l_start;
  95         compat_loff_t   l_len;
  96         compat_pid_t    l_pid;
  97 } __attribute__((packed));
  98
  99 struct compat_statfs {
 100         int             f_type;
 101         int             f_bsize;
 102         int             f_blocks;
 103         int             f_bfree;
 104         int             f_bavail;
 105         int             f_files;
 106         int             f_ffree;
 107         compat_fsid_t   f_fsid;
 108         int             f_namelen;      /* SunOS ignores this field. */
 109         int             f_frsize;
 110         int             f_spare[5];
 111 };
 112
 113 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
 114 #define COMPAT_RLIM_INFINITY            0xffffffff
 115
 116 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 117
 118 #define _COMPAT_NSIG            64
 119 #define _COMPAT_NSIG_BPW        32
 120
 121 typedef u32               compat_sigset_word;
 122
 123 #define COMPAT_OFF_T_MAX        0x7fffffff
 124 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 125
 126 struct compat_ipc64_perm {
 127         compat_key_t key;
 128         __compat_uid32_t uid;
 129         __compat_gid32_t gid;
 130         __compat_uid32_t cuid;
 131         __compat_gid32_t cgid;
 132         unsigned short mode;
 133         unsigned short __pad1;
 134         unsigned short seq;
 135         unsigned short __pad2;
 136         compat_ulong_t unused1;
 137         compat_ulong_t unused2;
 138 };
 139
 140 struct compat_semid64_ds {
 141         struct compat_ipc64_perm sem_perm;
 142         compat_time_t  sem_otime;
 143         compat_ulong_t __unused1;
 144         compat_time_t  sem_ctime;
 145         compat_ulong_t __unused2;
 146         compat_ulong_t sem_nsems;
 147         compat_ulong_t __unused3;
 148         compat_ulong_t __unused4;
 149 };
 150
 151 struct compat_msqid64_ds {
 152         struct compat_ipc64_perm msg_perm;
 153         compat_time_t  msg_stime;
 154         compat_ulong_t __unused1;
 155         compat_time_t  msg_rtime;
 156         compat_ulong_t __unused2;
 157         compat_time_t  msg_ctime;
 158         compat_ulong_t __unused3;
 159         compat_ulong_t msg_cbytes;
 160         compat_ulong_t msg_qnum;
 161         compat_ulong_t msg_qbytes;
 162         compat_pid_t   msg_lspid;
 163         compat_pid_t   msg_lrpid;
 164         compat_ulong_t __unused4;
 165         compat_ulong_t __unused5;
 166 };
 167
 168 struct compat_shmid64_ds {
 169         struct compat_ipc64_perm shm_perm;
 170         compat_size_t  shm_segsz;
 171         compat_time_t  shm_atime;
 172         compat_ulong_t __unused1;
 173         compat_time_t  shm_dtime;
 174         compat_ulong_t __unused2;
 175         compat_time_t  shm_ctime;
 176         compat_ulong_t __unused3;
 177         compat_pid_t   shm_cpid;
 178         compat_pid_t   shm_lpid;
 179         compat_ulong_t shm_nattch;
 180         compat_ulong_t __unused4;
 181         compat_ulong_t __unused5;
 182 };
 183
 184 /*
 185  * The type of struct elf_prstatus.pr_reg in compatible core dumps.
 186  */
 187 typedef struct user_regs_struct32 compat_elf_gregset_t;
 188
 189 /*
 190  * A pointer passed in from user mode. This should not
 191  * be used for syscall parameters, just declare them
 192  * as pointers because the syscall entry code will have
 193  * appropriately converted them already.
 194  */
 195 typedef u32             compat_uptr_t;
 196
 197 static inline void __user *compat_ptr(compat_uptr_t uptr)
 198 {
 199         return (void __user *)(unsigned long)uptr;
 200 }
 201
 202 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 203 {
 204         return (u32)(unsigned long)uptr;
 205 }
 206
 207 static inline void __user *compat_alloc_user_space(long len)
 208 {
 209         struct pt_regs *regs = task_pt_regs(current);
 210         return (void __user *)regs->sp - len;
 211 }
 212
 213 static inline int is_compat_task(void)
 214 {
 215         return current_thread_info()->status & TS_COMPAT;
 216 }
 217
 218 #endif /* _ASM_X86_COMPAT_H */