arch/x86/include/asm/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_COMPAT_H
   3 #define _ASM_X86_COMPAT_H
   4
   5 /*
   6  * Architecture specific compatibility types
   7  */
   8 #include <linux/types.h>
   9 #include <linux/sched.h>
  10 #include <linux/sched/task_stack.h>
  11 #include <asm/processor.h>
  12 #include <asm/user32.h>
  13 #include <asm/unistd.h>
  14
  15 #define compat_mode_t   compat_mode_t
  16 typedef u16             compat_mode_t;
  17
  18 #define __compat_uid_t  __compat_uid_t
  19 typedef u16             __compat_uid_t;
  20 typedef u16             __compat_gid_t;
  21
  22 #define compat_dev_t    compat_dev_t
  23 typedef u16             compat_dev_t;
  24
  25 #define compat_ipc_pid_t compat_ipc_pid_t
  26 typedef u16              compat_ipc_pid_t;
  27
  28 #define compat_statfs   compat_statfs
  29
  30 #include <asm-generic/compat.h>
  31
  32 #define COMPAT_UTS_MACHINE      "i686\0\0"
  33
  34 typedef u16             compat_nlink_t;
  35
  36 struct compat_stat {
  37         u32             st_dev;
  38         compat_ino_t    st_ino;
  39         compat_mode_t   st_mode;
  40         compat_nlink_t  st_nlink;
  41         __compat_uid_t  st_uid;
  42         __compat_gid_t  st_gid;
  43         u32             st_rdev;
  44         u32             st_size;
  45         u32             st_blksize;
  46         u32             st_blocks;
  47         u32             st_atime;
  48         u32             st_atime_nsec;
  49         u32             st_mtime;
  50         u32             st_mtime_nsec;
  51         u32             st_ctime;
  52         u32             st_ctime_nsec;
  53         u32             __unused4;
  54         u32             __unused5;
  55 };
  56
  57 /*
  58  * IA32 uses 4 byte alignment for 64 bit quantities, so we need to pack the
  59  * compat flock64 structure.
  60  */
  61 #define __ARCH_NEED_COMPAT_FLOCK64_PACKED
  62
  63 struct compat_statfs {
  64         int             f_type;
  65         int             f_bsize;
  66         int             f_blocks;
  67         int             f_bfree;
  68         int             f_bavail;
  69         int             f_files;
  70         int             f_ffree;
  71         compat_fsid_t   f_fsid;
  72         int             f_namelen;      /* SunOS ignores this field. */
  73         int             f_frsize;
  74         int             f_flags;
  75         int             f_spare[4];
  76 };
  77
  78 #ifdef CONFIG_X86_X32_ABI
  79 #define COMPAT_USE_64BIT_TIME \
  80         (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
  81 #endif
  82
  83 static inline bool in_x32_syscall(void)
  84 {
  85 #ifdef CONFIG_X86_X32_ABI
  86         if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
  87                 return true;
  88 #endif
  89         return false;
  90 }
  91
  92 static inline bool in_32bit_syscall(void)
  93 {
  94         return in_ia32_syscall() || in_x32_syscall();
  95 }
  96
  97 #ifdef CONFIG_COMPAT
  98 static inline bool in_compat_syscall(void)
  99 {
 100         return in_32bit_syscall();
 101 }
 102 #define in_compat_syscall in_compat_syscall     /* override the generic impl */
 103 #define compat_need_64bit_alignment_fixup in_ia32_syscall
 104 #endif
 105
 106 struct compat_siginfo;
 107
 108 #ifdef CONFIG_X86_X32_ABI
 109 int copy_siginfo_to_user32(struct compat_siginfo __user *to,
 110                 const kernel_siginfo_t *from);
 111 #define copy_siginfo_to_user32 copy_siginfo_to_user32
 112 #endif /* CONFIG_X86_X32_ABI */
 113
 114 #endif /* _ASM_X86_COMPAT_H */