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 #include <asm/unistd.h>
  11
  12 #define COMPAT_USER_HZ          100
  13 #define COMPAT_UTS_MACHINE      "i686\0\0"
  14
  15 typedef u32             compat_size_t;
  16 typedef s32             compat_ssize_t;
  17 typedef s32             compat_time_t;
  18 typedef s32             compat_clock_t;
  19 typedef s32             compat_pid_t;
  20 typedef u16             __compat_uid_t;
  21 typedef u16             __compat_gid_t;
  22 typedef u32             __compat_uid32_t;
  23 typedef u32             __compat_gid32_t;
  24 typedef u16             compat_mode_t;
  25 typedef u32             compat_ino_t;
  26 typedef u16             compat_dev_t;
  27 typedef s32             compat_off_t;
  28 typedef s64             compat_loff_t;
  29 typedef u16             compat_nlink_t;
  30 typedef u16             compat_ipc_pid_t;
  31 typedef s32             compat_daddr_t;
  32 typedef u32             compat_caddr_t;
  33 typedef __kernel_fsid_t compat_fsid_t;
  34 typedef s32             compat_timer_t;
  35 typedef s32             compat_key_t;
  36
  37 typedef s32             compat_int_t;
  38 typedef s32             compat_long_t;
  39 typedef s64 __attribute__((aligned(4))) compat_s64;
  40 typedef u32             compat_uint_t;
  41 typedef u32             compat_ulong_t;
  42 typedef u64 __attribute__((aligned(4))) compat_u64;
  43
  44 struct compat_timespec {
  45         compat_time_t   tv_sec;
  46         s32             tv_nsec;
  47 };
  48
  49 struct compat_timeval {
  50         compat_time_t   tv_sec;
  51         s32             tv_usec;
  52 };
  53
  54 struct compat_stat {
  55         compat_dev_t    st_dev;
  56         u16             __pad1;
  57         compat_ino_t    st_ino;
  58         compat_mode_t   st_mode;
  59         compat_nlink_t  st_nlink;
  60         __compat_uid_t  st_uid;
  61         __compat_gid_t  st_gid;
  62         compat_dev_t    st_rdev;
  63         u16             __pad2;
  64         u32             st_size;
  65         u32             st_blksize;
  66         u32             st_blocks;
  67         u32             st_atime;
  68         u32             st_atime_nsec;
  69         u32             st_mtime;
  70         u32             st_mtime_nsec;
  71         u32             st_ctime;
  72         u32             st_ctime_nsec;
  73         u32             __unused4;
  74         u32             __unused5;
  75 };
  76
  77 struct compat_flock {
  78         short           l_type;
  79         short           l_whence;
  80         compat_off_t    l_start;
  81         compat_off_t    l_len;
  82         compat_pid_t    l_pid;
  83 };
  84
  85 #define F_GETLK64       12      /*  using 'struct flock64' */
  86 #define F_SETLK64       13
  87 #define F_SETLKW64      14
  88
  89 /*
  90  * IA32 uses 4 byte alignment for 64 bit quantities,
  91  * so we need to pack this structure.
  92  */
  93 struct compat_flock64 {
  94         short           l_type;
  95         short           l_whence;
  96         compat_loff_t   l_start;
  97         compat_loff_t   l_len;
  98         compat_pid_t    l_pid;
  99 } __attribute__((packed));
 100
 101 struct compat_statfs {
 102         int             f_type;
 103         int             f_bsize;
 104         int             f_blocks;
 105         int             f_bfree;
 106         int             f_bavail;
 107         int             f_files;
 108         int             f_ffree;
 109         compat_fsid_t   f_fsid;
 110         int             f_namelen;      /* SunOS ignores this field. */
 111         int             f_frsize;
 112         int             f_flags;
 113         int             f_spare[4];
 114 };
 115
 116 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
 117 #define COMPAT_RLIM_INFINITY            0xffffffff
 118
 119 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 120
 121 #define _COMPAT_NSIG            64
 122 #define _COMPAT_NSIG_BPW        32
 123
 124 typedef u32               compat_sigset_word;
 125
 126 #define COMPAT_OFF_T_MAX        0x7fffffff
 127 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 128
 129 struct compat_ipc64_perm {
 130         compat_key_t key;
 131         __compat_uid32_t uid;
 132         __compat_gid32_t gid;
 133         __compat_uid32_t cuid;
 134         __compat_gid32_t cgid;
 135         unsigned short mode;
 136         unsigned short __pad1;
 137         unsigned short seq;
 138         unsigned short __pad2;
 139         compat_ulong_t unused1;
 140         compat_ulong_t unused2;
 141 };
 142
 143 struct compat_semid64_ds {
 144         struct compat_ipc64_perm sem_perm;
 145         compat_time_t  sem_otime;
 146         compat_ulong_t __unused1;
 147         compat_time_t  sem_ctime;
 148         compat_ulong_t __unused2;
 149         compat_ulong_t sem_nsems;
 150         compat_ulong_t __unused3;
 151         compat_ulong_t __unused4;
 152 };
 153
 154 struct compat_msqid64_ds {
 155         struct compat_ipc64_perm msg_perm;
 156         compat_time_t  msg_stime;
 157         compat_ulong_t __unused1;
 158         compat_time_t  msg_rtime;
 159         compat_ulong_t __unused2;
 160         compat_time_t  msg_ctime;
 161         compat_ulong_t __unused3;
 162         compat_ulong_t msg_cbytes;
 163         compat_ulong_t msg_qnum;
 164         compat_ulong_t msg_qbytes;
 165         compat_pid_t   msg_lspid;
 166         compat_pid_t   msg_lrpid;
 167         compat_ulong_t __unused4;
 168         compat_ulong_t __unused5;
 169 };
 170
 171 struct compat_shmid64_ds {
 172         struct compat_ipc64_perm shm_perm;
 173         compat_size_t  shm_segsz;
 174         compat_time_t  shm_atime;
 175         compat_ulong_t __unused1;
 176         compat_time_t  shm_dtime;
 177         compat_ulong_t __unused2;
 178         compat_time_t  shm_ctime;
 179         compat_ulong_t __unused3;
 180         compat_pid_t   shm_cpid;
 181         compat_pid_t   shm_lpid;
 182         compat_ulong_t shm_nattch;
 183         compat_ulong_t __unused4;
 184         compat_ulong_t __unused5;
 185 };
 186
 187 /*
 188  * The type of struct elf_prstatus.pr_reg in compatible core dumps.
 189  */
 190 typedef struct user_regs_struct32 compat_elf_gregset_t;
 191
 192 /*
 193  * A pointer passed in from user mode. This should not
 194  * be used for syscall parameters, just declare them
 195  * as pointers because the syscall entry code will have
 196  * appropriately converted them already.
 197  */
 198 typedef u32             compat_uptr_t;
 199
 200 static inline void __user *compat_ptr(compat_uptr_t uptr)
 201 {
 202         return (void __user *)(unsigned long)uptr;
 203 }
 204
 205 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 206 {
 207         return (u32)(unsigned long)uptr;
 208 }
 209
 210 static inline void __user *arch_compat_alloc_user_space(long len)
 211 {
 212         struct pt_regs *regs = task_pt_regs(current);
 213         return (void __user *)regs->sp - len;
 214 }
 215
 216 static inline bool is_compat_task(void)
 217 {
 218 #ifdef CONFIG_IA32_EMULATION
 219         if (current_thread_info()->status & TS_COMPAT)
 220                 return true;
 221 #endif
 222 #ifdef CONFIG_X86_X32_ABI
 223         if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
 224                 return true;
 225 #endif
 226         return false;
 227 }
 228
 229 #endif /* _ASM_X86_COMPAT_H */