arch/mips/include/asm/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_COMPAT_H
   3 #define _ASM_COMPAT_H
   4 /*
   5  * Architecture specific compatibility types
   6  */
   7 #include <linux/thread_info.h>
   8 #include <linux/types.h>
   9 #include <asm/page.h>
  10 #include <asm/ptrace.h>
  11
  12 #define COMPAT_USER_HZ          100
  13 #define COMPAT_UTS_MACHINE      "mips\0\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_suseconds_t;
  20
  21 typedef s32             compat_pid_t;
  22 typedef s32             __compat_uid_t;
  23 typedef s32             __compat_gid_t;
  24 typedef __compat_uid_t  __compat_uid32_t;
  25 typedef __compat_gid_t  __compat_gid32_t;
  26 typedef u32             compat_mode_t;
  27 typedef u32             compat_ino_t;
  28 typedef u32             compat_dev_t;
  29 typedef s32             compat_off_t;
  30 typedef s64             compat_loff_t;
  31 typedef u32             compat_nlink_t;
  32 typedef s32             compat_ipc_pid_t;
  33 typedef s32             compat_daddr_t;
  34 typedef s32             compat_caddr_t;
  35 typedef struct {
  36         s32     val[2];
  37 } compat_fsid_t;
  38 typedef s32             compat_timer_t;
  39 typedef s32             compat_key_t;
  40
  41 typedef s32             compat_int_t;
  42 typedef s32             compat_long_t;
  43 typedef s64             compat_s64;
  44 typedef u32             compat_uint_t;
  45 typedef u32             compat_ulong_t;
  46 typedef u64             compat_u64;
  47 typedef u32             compat_uptr_t;
  48
  49 struct compat_timespec {
  50         compat_time_t   tv_sec;
  51         s32             tv_nsec;
  52 };
  53
  54 struct compat_timeval {
  55         compat_time_t   tv_sec;
  56         s32             tv_usec;
  57 };
  58
  59 struct compat_stat {
  60         compat_dev_t    st_dev;
  61         s32             st_pad1[3];
  62         compat_ino_t    st_ino;
  63         compat_mode_t   st_mode;
  64         compat_nlink_t  st_nlink;
  65         __compat_uid_t  st_uid;
  66         __compat_gid_t  st_gid;
  67         compat_dev_t    st_rdev;
  68         s32             st_pad2[2];
  69         compat_off_t    st_size;
  70         s32             st_pad3;
  71         compat_time_t   st_atime;
  72         s32             st_atime_nsec;
  73         compat_time_t   st_mtime;
  74         s32             st_mtime_nsec;
  75         compat_time_t   st_ctime;
  76         s32             st_ctime_nsec;
  77         s32             st_blksize;
  78         s32             st_blocks;
  79         s32             st_pad4[14];
  80 };
  81
  82 struct compat_flock {
  83         short           l_type;
  84         short           l_whence;
  85         compat_off_t    l_start;
  86         compat_off_t    l_len;
  87         s32             l_sysid;
  88         compat_pid_t    l_pid;
  89         s32             pad[4];
  90 };
  91
  92 #define F_GETLK64       33
  93 #define F_SETLK64       34
  94 #define F_SETLKW64      35
  95
  96 struct compat_flock64 {
  97         short           l_type;
  98         short           l_whence;
  99         compat_loff_t   l_start;
 100         compat_loff_t   l_len;
 101         compat_pid_t    l_pid;
 102 };
 103
 104 struct compat_statfs {
 105         int             f_type;
 106         int             f_bsize;
 107         int             f_frsize;
 108         int             f_blocks;
 109         int             f_bfree;
 110         int             f_files;
 111         int             f_ffree;
 112         int             f_bavail;
 113         compat_fsid_t   f_fsid;
 114         int             f_namelen;
 115         int             f_flags;
 116         int             f_spare[5];
 117 };
 118
 119 #define COMPAT_RLIM_INFINITY    0x7fffffffUL
 120
 121 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 122
 123 #define _COMPAT_NSIG            128             /* Don't ask !$@#% ...  */
 124 #define _COMPAT_NSIG_BPW        32
 125
 126 typedef u32             compat_sigset_word;
 127
 128 #define COMPAT_OFF_T_MAX        0x7fffffff
 129
 130 /*
 131  * A pointer passed in from user mode. This should not
 132  * be used for syscall parameters, just declare them
 133  * as pointers because the syscall entry code will have
 134  * appropriately converted them already.
 135  */
 136
 137 static inline void __user *compat_ptr(compat_uptr_t uptr)
 138 {
 139         /* cast to a __user pointer via "unsigned long" makes sparse happy */
 140         return (void __user *)(unsigned long)(long)uptr;
 141 }
 142
 143 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 144 {
 145         return (u32)(unsigned long)uptr;
 146 }
 147
 148 static inline void __user *arch_compat_alloc_user_space(long len)
 149 {
 150         struct pt_regs *regs = (struct pt_regs *)
 151                 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
 152
 153         return (void __user *) (regs->regs[29] - len);
 154 }
 155
 156 struct compat_ipc64_perm {
 157         compat_key_t key;
 158         __compat_uid32_t uid;
 159         __compat_gid32_t gid;
 160         __compat_uid32_t cuid;
 161         __compat_gid32_t cgid;
 162         compat_mode_t mode;
 163         unsigned short seq;
 164         unsigned short __pad2;
 165         compat_ulong_t __unused1;
 166         compat_ulong_t __unused2;
 167 };
 168
 169 struct compat_semid64_ds {
 170         struct compat_ipc64_perm sem_perm;
 171         compat_time_t   sem_otime;
 172         compat_time_t   sem_ctime;
 173         compat_ulong_t  sem_nsems;
 174         compat_ulong_t  __unused1;
 175         compat_ulong_t  __unused2;
 176 };
 177
 178 struct compat_msqid64_ds {
 179         struct compat_ipc64_perm msg_perm;
 180 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 181         compat_ulong_t  __unused1;
 182 #endif
 183         compat_time_t   msg_stime;
 184 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 185         compat_ulong_t  __unused1;
 186 #endif
 187 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 188         compat_ulong_t  __unused2;
 189 #endif
 190         compat_time_t   msg_rtime;
 191 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 192         compat_ulong_t  __unused2;
 193 #endif
 194 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 195         compat_ulong_t  __unused3;
 196 #endif
 197         compat_time_t   msg_ctime;
 198 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 199         compat_ulong_t  __unused3;
 200 #endif
 201         compat_ulong_t  msg_cbytes;
 202         compat_ulong_t  msg_qnum;
 203         compat_ulong_t  msg_qbytes;
 204         compat_pid_t    msg_lspid;
 205         compat_pid_t    msg_lrpid;
 206         compat_ulong_t  __unused4;
 207         compat_ulong_t  __unused5;
 208 };
 209
 210 struct compat_shmid64_ds {
 211         struct compat_ipc64_perm shm_perm;
 212         compat_size_t   shm_segsz;
 213         compat_time_t   shm_atime;
 214         compat_time_t   shm_dtime;
 215         compat_time_t   shm_ctime;
 216         compat_pid_t    shm_cpid;
 217         compat_pid_t    shm_lpid;
 218         compat_ulong_t  shm_nattch;
 219         compat_ulong_t  __unused1;
 220         compat_ulong_t  __unused2;
 221 };
 222
 223 /* MIPS has unusual order of fields in stack_t */
 224 typedef struct compat_sigaltstack {
 225         compat_uptr_t                   ss_sp;
 226         compat_size_t                   ss_size;
 227         int                             ss_flags;
 228 } compat_stack_t;
 229 #define compat_sigaltstack compat_sigaltstack
 230
 231 static inline int is_compat_task(void)
 232 {
 233         return test_thread_flag(TIF_32BIT_ADDR);
 234 }
 235
 236 #endif /* _ASM_COMPAT_H */