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 #include <asm-generic/compat.h>
  13
  14 #define COMPAT_USER_HZ          100
  15 #define COMPAT_UTS_MACHINE      "mips\0\0\0"
  16
  17 typedef s32             __compat_uid_t;
  18 typedef s32             __compat_gid_t;
  19 typedef __compat_uid_t  __compat_uid32_t;
  20 typedef __compat_gid_t  __compat_gid32_t;
  21 typedef u32             compat_mode_t;
  22 typedef u32             compat_dev_t;
  23 typedef u32             compat_nlink_t;
  24 typedef s32             compat_ipc_pid_t;
  25 typedef s32             compat_caddr_t;
  26 typedef struct {
  27         s32     val[2];
  28 } compat_fsid_t;
  29
  30 struct compat_stat {
  31         compat_dev_t    st_dev;
  32         s32             st_pad1[3];
  33         compat_ino_t    st_ino;
  34         compat_mode_t   st_mode;
  35         compat_nlink_t  st_nlink;
  36         __compat_uid_t  st_uid;
  37         __compat_gid_t  st_gid;
  38         compat_dev_t    st_rdev;
  39         s32             st_pad2[2];
  40         compat_off_t    st_size;
  41         s32             st_pad3;
  42         old_time32_t    st_atime;
  43         s32             st_atime_nsec;
  44         old_time32_t    st_mtime;
  45         s32             st_mtime_nsec;
  46         old_time32_t    st_ctime;
  47         s32             st_ctime_nsec;
  48         s32             st_blksize;
  49         s32             st_blocks;
  50         s32             st_pad4[14];
  51 };
  52
  53 struct compat_flock {
  54         short           l_type;
  55         short           l_whence;
  56         compat_off_t    l_start;
  57         compat_off_t    l_len;
  58         s32             l_sysid;
  59         compat_pid_t    l_pid;
  60         s32             pad[4];
  61 };
  62
  63 #define F_GETLK64       33
  64 #define F_SETLK64       34
  65 #define F_SETLKW64      35
  66
  67 struct compat_flock64 {
  68         short           l_type;
  69         short           l_whence;
  70         compat_loff_t   l_start;
  71         compat_loff_t   l_len;
  72         compat_pid_t    l_pid;
  73 };
  74
  75 struct compat_statfs {
  76         int             f_type;
  77         int             f_bsize;
  78         int             f_frsize;
  79         int             f_blocks;
  80         int             f_bfree;
  81         int             f_files;
  82         int             f_ffree;
  83         int             f_bavail;
  84         compat_fsid_t   f_fsid;
  85         int             f_namelen;
  86         int             f_flags;
  87         int             f_spare[5];
  88 };
  89
  90 #define COMPAT_RLIM_INFINITY    0x7fffffffUL
  91
  92 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
  93
  94 #define _COMPAT_NSIG            128             /* Don't ask !$@#% ...  */
  95 #define _COMPAT_NSIG_BPW        32
  96
  97 typedef u32             compat_sigset_word;
  98
  99 #define COMPAT_OFF_T_MAX        0x7fffffff
 100
 101 static inline void __user *arch_compat_alloc_user_space(long len)
 102 {
 103         struct pt_regs *regs = (struct pt_regs *)
 104                 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
 105
 106         return (void __user *) (regs->regs[29] - len);
 107 }
 108
 109 struct compat_ipc64_perm {
 110         compat_key_t key;
 111         __compat_uid32_t uid;
 112         __compat_gid32_t gid;
 113         __compat_uid32_t cuid;
 114         __compat_gid32_t cgid;
 115         compat_mode_t mode;
 116         unsigned short seq;
 117         unsigned short __pad2;
 118         compat_ulong_t __unused1;
 119         compat_ulong_t __unused2;
 120 };
 121
 122 struct compat_semid64_ds {
 123         struct compat_ipc64_perm sem_perm;
 124         compat_ulong_t  sem_otime;
 125         compat_ulong_t  sem_ctime;
 126         compat_ulong_t  sem_nsems;
 127         compat_ulong_t  sem_otime_high;
 128         compat_ulong_t  sem_ctime_high;
 129 };
 130
 131 struct compat_msqid64_ds {
 132         struct compat_ipc64_perm msg_perm;
 133 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 134         compat_ulong_t  msg_stime_high;
 135 #endif
 136         compat_ulong_t  msg_stime;
 137 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 138         compat_ulong_t  msg_stime_high;
 139 #endif
 140 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 141         compat_ulong_t  msg_rtime_high;
 142 #endif
 143         compat_ulong_t  msg_rtime;
 144 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 145         compat_ulong_t  msg_rtime_high;
 146 #endif
 147 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 148         compat_ulong_t  msg_ctime_high;
 149 #endif
 150         compat_ulong_t  msg_ctime;
 151 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 152         compat_ulong_t  msg_ctime_high;
 153 #endif
 154         compat_ulong_t  msg_cbytes;
 155         compat_ulong_t  msg_qnum;
 156         compat_ulong_t  msg_qbytes;
 157         compat_pid_t    msg_lspid;
 158         compat_pid_t    msg_lrpid;
 159         compat_ulong_t  __unused4;
 160         compat_ulong_t  __unused5;
 161 };
 162
 163 struct compat_shmid64_ds {
 164         struct compat_ipc64_perm shm_perm;
 165         compat_size_t   shm_segsz;
 166         compat_ulong_t  shm_atime;
 167         compat_ulong_t  shm_dtime;
 168         compat_ulong_t  shm_ctime;
 169         compat_pid_t    shm_cpid;
 170         compat_pid_t    shm_lpid;
 171         compat_ulong_t  shm_nattch;
 172         compat_ushort_t shm_atime_high;
 173         compat_ushort_t shm_dtime_high;
 174         compat_ushort_t shm_ctime_high;
 175         compat_ushort_t __unused2;
 176 };
 177
 178 /* MIPS has unusual order of fields in stack_t */
 179 typedef struct compat_sigaltstack {
 180         compat_uptr_t                   ss_sp;
 181         compat_size_t                   ss_size;
 182         int                             ss_flags;
 183 } compat_stack_t;
 184 #define compat_sigaltstack compat_sigaltstack
 185
 186 static inline int is_compat_task(void)
 187 {
 188         return test_thread_flag(TIF_32BIT_ADDR);
 189 }
 190
 191 #endif /* _ASM_COMPAT_H */