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 #define __compat_uid_t  __compat_uid_t
  12 typedef u16             __compat_uid_t;
  13 typedef u16             __compat_gid_t;
  14
  15 #define compat_ipc_pid_t compat_ipc_pid_t
  16 typedef u16             compat_ipc_pid_t;
  17
  18 #define compat_statfs   compat_statfs
  19
  20 #include <asm-generic/compat.h>
  21
  22 #ifdef CONFIG_COMPAT
  23
  24 /*
  25  * Architecture specific compatibility types
  26  */
  27 #include <linux/types.h>
  28 #include <linux/sched.h>
  29 #include <linux/sched/task_stack.h>
  30
  31 #ifdef __AARCH64EB__
  32 #define COMPAT_UTS_MACHINE      "armv8b\0\0"
  33 #else
  34 #define COMPAT_UTS_MACHINE      "armv8l\0\0"
  35 #endif
  36
  37 typedef u16             __compat_uid16_t;
  38 typedef u16             __compat_gid16_t;
  39 typedef s32             compat_nlink_t;
  40
  41 struct compat_stat {
  42 #ifdef __AARCH64EB__
  43         short           st_dev;
  44         short           __pad1;
  45 #else
  46         compat_dev_t    st_dev;
  47 #endif
  48         compat_ino_t    st_ino;
  49         compat_mode_t   st_mode;
  50         compat_ushort_t st_nlink;
  51         __compat_uid16_t        st_uid;
  52         __compat_gid16_t        st_gid;
  53 #ifdef __AARCH64EB__
  54         short           st_rdev;
  55         short           __pad2;
  56 #else
  57         compat_dev_t    st_rdev;
  58 #endif
  59         compat_off_t    st_size;
  60         compat_off_t    st_blksize;
  61         compat_off_t    st_blocks;
  62         old_time32_t    st_atime;
  63         compat_ulong_t  st_atime_nsec;
  64         old_time32_t    st_mtime;
  65         compat_ulong_t  st_mtime_nsec;
  66         old_time32_t    st_ctime;
  67         compat_ulong_t  st_ctime_nsec;
  68         compat_ulong_t  __unused4[2];
  69 };
  70
  71 struct compat_statfs {
  72         int             f_type;
  73         int             f_bsize;
  74         int             f_blocks;
  75         int             f_bfree;
  76         int             f_bavail;
  77         int             f_files;
  78         int             f_ffree;
  79         compat_fsid_t   f_fsid;
  80         int             f_namelen;      /* SunOS ignores this field. */
  81         int             f_frsize;
  82         int             f_flags;
  83         int             f_spare[4];
  84 };
  85
  86 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
  87 #define COMPAT_MINSIGSTKSZ      2048
  88
  89 static inline int is_compat_task(void)
  90 {
  91         return test_thread_flag(TIF_32BIT);
  92 }
  93
  94 static inline int is_compat_thread(struct thread_info *thread)
  95 {
  96         return test_ti_thread_flag(thread, TIF_32BIT);
  97 }
  98
  99 long compat_arm_syscall(struct pt_regs *regs, int scno);
 100
 101 #else /* !CONFIG_COMPAT */
 102
 103 static inline int is_compat_thread(struct thread_info *thread)
 104 {
 105         return 0;
 106 }
 107
 108 #endif /* CONFIG_COMPAT */
 109 #endif /* __ASM_COMPAT_H */