arch/arm64/include/asm/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2012 ARM Ltd.
   4  */
   5 #ifndef __ASM_COMPAT_H
   6 #define __ASM_COMPAT_H
   7
   8 #define compat_mode_t compat_mode_t
   9 typedef u16             compat_mode_t;
  10
  11 #include <asm-generic/compat.h>
  12
  13 #ifdef CONFIG_COMPAT
  14
  15 /*
  16  * Architecture specific compatibility types
  17  */
  18 #include <linux/types.h>
  19 #include <linux/sched.h>
  20 #include <linux/sched/task_stack.h>
  21
  22 #define COMPAT_USER_HZ          100
  23 #ifdef __AARCH64EB__
  24 #define COMPAT_UTS_MACHINE      "armv8b\0\0"
  25 #else
  26 #define COMPAT_UTS_MACHINE      "armv8l\0\0"
  27 #endif
  28
  29 typedef u16             __compat_uid_t;
  30 typedef u16             __compat_gid_t;
  31 typedef u16             __compat_uid16_t;
  32 typedef u16             __compat_gid16_t;
  33 typedef u32             compat_dev_t;
  34 typedef s32             compat_nlink_t;
  35 typedef u16             compat_ipc_pid_t;
  36 typedef __kernel_fsid_t compat_fsid_t;
  37
  38 struct compat_stat {
  39 #ifdef __AARCH64EB__
  40         short           st_dev;
  41         short           __pad1;
  42 #else
  43         compat_dev_t    st_dev;
  44 #endif
  45         compat_ino_t    st_ino;
  46         compat_mode_t   st_mode;
  47         compat_ushort_t st_nlink;
  48         __compat_uid16_t        st_uid;
  49         __compat_gid16_t        st_gid;
  50 #ifdef __AARCH64EB__
  51         short           st_rdev;
  52         short           __pad2;
  53 #else
  54         compat_dev_t    st_rdev;
  55 #endif
  56         compat_off_t    st_size;
  57         compat_off_t    st_blksize;
  58         compat_off_t    st_blocks;
  59         old_time32_t    st_atime;
  60         compat_ulong_t  st_atime_nsec;
  61         old_time32_t    st_mtime;
  62         compat_ulong_t  st_mtime_nsec;
  63         old_time32_t    st_ctime;
  64         compat_ulong_t  st_ctime_nsec;
  65         compat_ulong_t  __unused4[2];
  66 };
  67
  68 struct compat_flock {
  69         short           l_type;
  70         short           l_whence;
  71         compat_off_t    l_start;
  72         compat_off_t    l_len;
  73         compat_pid_t    l_pid;
  74 };
  75
  76 #define F_GETLK64       12      /*  using 'struct flock64' */
  77 #define F_SETLK64       13
  78 #define F_SETLKW64      14
  79
  80 struct compat_flock64 {
  81         short           l_type;
  82         short           l_whence;
  83         compat_loff_t   l_start;
  84         compat_loff_t   l_len;
  85         compat_pid_t    l_pid;
  86 };
  87
  88 struct compat_statfs {
  89         int             f_type;
  90         int             f_bsize;
  91         int             f_blocks;
  92         int             f_bfree;
  93         int             f_bavail;
  94         int             f_files;
  95         int             f_ffree;
  96         compat_fsid_t   f_fsid;
  97         int             f_namelen;      /* SunOS ignores this field. */
  98         int             f_frsize;
  99         int             f_flags;
 100         int             f_spare[4];
 101 };
 102
 103 #define COMPAT_RLIM_INFINITY            0xffffffff
 104
 105 #define COMPAT_OFF_T_MAX        0x7fffffff
 106
 107 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
 108 #define COMPAT_MINSIGSTKSZ      2048
 109
 110 struct compat_ipc64_perm {
 111         compat_key_t key;
 112         __compat_uid32_t uid;
 113         __compat_gid32_t gid;
 114         __compat_uid32_t cuid;
 115         __compat_gid32_t cgid;
 116         unsigned short mode;
 117         unsigned short __pad1;
 118         unsigned short seq;
 119         unsigned short __pad2;
 120         compat_ulong_t unused1;
 121         compat_ulong_t unused2;
 122 };
 123
 124 struct compat_semid64_ds {
 125         struct compat_ipc64_perm sem_perm;
 126         compat_ulong_t sem_otime;
 127         compat_ulong_t sem_otime_high;
 128         compat_ulong_t sem_ctime;
 129         compat_ulong_t sem_ctime_high;
 130         compat_ulong_t sem_nsems;
 131         compat_ulong_t __unused3;
 132         compat_ulong_t __unused4;
 133 };
 134
 135 struct compat_msqid64_ds {
 136         struct compat_ipc64_perm msg_perm;
 137         compat_ulong_t msg_stime;
 138         compat_ulong_t msg_stime_high;
 139         compat_ulong_t msg_rtime;
 140         compat_ulong_t msg_rtime_high;
 141         compat_ulong_t msg_ctime;
 142         compat_ulong_t msg_ctime_high;
 143         compat_ulong_t msg_cbytes;
 144         compat_ulong_t msg_qnum;
 145         compat_ulong_t msg_qbytes;
 146         compat_pid_t   msg_lspid;
 147         compat_pid_t   msg_lrpid;
 148         compat_ulong_t __unused4;
 149         compat_ulong_t __unused5;
 150 };
 151
 152 struct compat_shmid64_ds {
 153         struct compat_ipc64_perm shm_perm;
 154         compat_size_t  shm_segsz;
 155         compat_ulong_t shm_atime;
 156         compat_ulong_t shm_atime_high;
 157         compat_ulong_t shm_dtime;
 158         compat_ulong_t shm_dtime_high;
 159         compat_ulong_t shm_ctime;
 160         compat_ulong_t shm_ctime_high;
 161         compat_pid_t   shm_cpid;
 162         compat_pid_t   shm_lpid;
 163         compat_ulong_t shm_nattch;
 164         compat_ulong_t __unused4;
 165         compat_ulong_t __unused5;
 166 };
 167
 168 static inline int is_compat_task(void)
 169 {
 170         return test_thread_flag(TIF_32BIT);
 171 }
 172
 173 static inline int is_compat_thread(struct thread_info *thread)
 174 {
 175         return test_ti_thread_flag(thread, TIF_32BIT);
 176 }
 177
 178 #else /* !CONFIG_COMPAT */
 179
 180 static inline int is_compat_thread(struct thread_info *thread)
 181 {
 182         return 0;
 183 }
 184
 185 #endif /* CONFIG_COMPAT */
 186 #endif /* __ASM_COMPAT_H */