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 #define COMPAT_UTS_MACHINE      "i686\0\0"
  13
  14 typedef u32             compat_size_t;
  15 typedef s32             compat_ssize_t;
  16 typedef s32             compat_time_t;
  17 typedef s32             compat_clock_t;
  18 typedef s32             compat_pid_t;
  19 typedef u16             __compat_uid_t;
  20 typedef u16             __compat_gid_t;
  21 typedef u32             __compat_uid32_t;
  22 typedef u32             __compat_gid32_t;
  23 typedef u16             compat_mode_t;
  24 typedef u32             compat_ino_t;
  25 typedef u16             compat_dev_t;
  26 typedef s32             compat_off_t;
  27 typedef s64             compat_loff_t;
  28 typedef u16             compat_nlink_t;
  29 typedef u16             compat_ipc_pid_t;
  30 typedef s32             compat_daddr_t;
  31 typedef u32             compat_caddr_t;
  32 typedef __kernel_fsid_t compat_fsid_t;
  33 typedef s32             compat_timer_t;
  34 typedef s32             compat_key_t;
  35
  36 typedef s32             compat_int_t;
  37 typedef s32             compat_long_t;
  38 typedef s64 __attribute__((aligned(4))) compat_s64;
  39 typedef u32             compat_uint_t;
  40 typedef u32             compat_ulong_t;
  41 typedef u64 __attribute__((aligned(4))) compat_u64;
  42
  43 struct compat_timespec {
  44         compat_time_t   tv_sec;
  45         s32             tv_nsec;
  46 };
  47
  48 struct compat_timeval {
  49         compat_time_t   tv_sec;
  50         s32             tv_usec;
  51 };
  52
  53 struct compat_stat {
  54         compat_dev_t    st_dev;
  55         u16             __pad1;
  56         compat_ino_t    st_ino;
  57         compat_mode_t   st_mode;
  58         compat_nlink_t  st_nlink;
  59         __compat_uid_t  st_uid;
  60         __compat_gid_t  st_gid;
  61         compat_dev_t    st_rdev;
  62         u16             __pad2;
  63         u32             st_size;
  64         u32             st_blksize;
  65         u32             st_blocks;
  66         u32             st_atime;
  67         u32             st_atime_nsec;
  68         u32             st_mtime;
  69         u32             st_mtime_nsec;
  70         u32             st_ctime;
  71         u32             st_ctime_nsec;
  72         u32             __unused4;
  73         u32             __unused5;
  74 };
  75
  76 struct compat_flock {
  77         short           l_type;
  78         short           l_whence;
  79         compat_off_t    l_start;
  80         compat_off_t    l_len;
  81         compat_pid_t    l_pid;
  82 };
  83
  84 #define F_GETLK64       12      /*  using 'struct flock64' */
  85 #define F_SETLK64       13
  86 #define F_SETLKW64      14
  87
  88 /*
  89  * IA32 uses 4 byte alignment for 64 bit quantities,
  90  * so we need to pack this structure.
  91  */
  92 struct compat_flock64 {
  93         short           l_type;
  94         short           l_whence;
  95         compat_loff_t   l_start;
  96         compat_loff_t   l_len;
  97         compat_pid_t    l_pid;
  98 } __attribute__((packed));
  99
 100 struct compat_statfs {
 101         int             f_type;
 102         int             f_bsize;
 103         int             f_blocks;
 104         int             f_bfree;
 105         int             f_bavail;
 106         int             f_files;
 107         int             f_ffree;
 108         compat_fsid_t   f_fsid;
 109         int             f_namelen;      /* SunOS ignores this field. */
 110         int             f_frsize;
 111         int             f_spare[5];
 112 };
 113
 114 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
 115 #define COMPAT_RLIM_INFINITY            0xffffffff
 116
 117 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 118
 119 #define _COMPAT_NSIG            64
 120 #define _COMPAT_NSIG_BPW        32
 121
 122 typedef u32               compat_sigset_word;
 123
 124 #define COMPAT_OFF_T_MAX        0x7fffffff
 125 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 126
 127 struct compat_ipc64_perm {
 128         compat_key_t key;
 129         __compat_uid32_t uid;
 130         __compat_gid32_t gid;
 131         __compat_uid32_t cuid;
 132         __compat_gid32_t cgid;
 133         unsigned short mode;
 134         unsigned short __pad1;
 135         unsigned short seq;
 136         unsigned short __pad2;
 137         compat_ulong_t unused1;
 138         compat_ulong_t unused2;
 139 };
 140
 141 struct compat_semid64_ds {
 142         struct compat_ipc64_perm sem_perm;
 143         compat_time_t  sem_otime;
 144         compat_ulong_t __unused1;
 145         compat_time_t  sem_ctime;
 146         compat_ulong_t __unused2;
 147         compat_ulong_t sem_nsems;
 148         compat_ulong_t __unused3;
 149         compat_ulong_t __unused4;
 150 };
 151
 152 struct compat_msqid64_ds {
 153         struct compat_ipc64_perm msg_perm;
 154         compat_time_t  msg_stime;
 155         compat_ulong_t __unused1;
 156         compat_time_t  msg_rtime;
 157         compat_ulong_t __unused2;
 158         compat_time_t  msg_ctime;
 159         compat_ulong_t __unused3;
 160         compat_ulong_t msg_cbytes;
 161         compat_ulong_t msg_qnum;
 162         compat_ulong_t msg_qbytes;
 163         compat_pid_t   msg_lspid;
 164         compat_pid_t   msg_lrpid;
 165         compat_ulong_t __unused4;
 166         compat_ulong_t __unused5;
 167 };
 168
 169 struct compat_shmid64_ds {
 170         struct compat_ipc64_perm shm_perm;
 171         compat_size_t  shm_segsz;
 172         compat_time_t  shm_atime;
 173         compat_ulong_t __unused1;
 174         compat_time_t  shm_dtime;
 175         compat_ulong_t __unused2;
 176         compat_time_t  shm_ctime;
 177         compat_ulong_t __unused3;
 178         compat_pid_t   shm_cpid;
 179         compat_pid_t   shm_lpid;
 180         compat_ulong_t shm_nattch;
 181         compat_ulong_t __unused4;
 182         compat_ulong_t __unused5;
 183 };
 184
 185 /*
 186  * The type of struct elf_prstatus.pr_reg in compatible core dumps.
 187  */
 188 typedef struct user_regs_struct32 compat_elf_gregset_t;
 189
 190 /*
 191  * A pointer passed in from user mode. This should not
 192  * be used for syscall parameters, just declare them
 193  * as pointers because the syscall entry code will have
 194  * appropriately converted them already.
 195  */
 196 typedef u32             compat_uptr_t;
 197
 198 static inline void __user *compat_ptr(compat_uptr_t uptr)
 199 {
 200         return (void __user *)(unsigned long)uptr;
 201 }
 202
 203 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 204 {
 205         return (u32)(unsigned long)uptr;
 206 }
 207
 208 static inline void __user *arch_compat_alloc_user_space(long len)
 209 {
 210         struct pt_regs *regs = task_pt_regs(current);
 211         return (void __user *)regs->sp - len;
 212 }
 213
 214 static inline int is_compat_task(void)
 215 {
 216         return current_thread_info()->status & TS_COMPAT;
 217 }
 218
 219 #endif /* _ASM_X86_COMPAT_H */