include/uapi/linux/types.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _UAPI_LINUX_TYPES_H
   3 #define _UAPI_LINUX_TYPES_H
   4
   5 #include <asm/types.h>
   6
   7 #ifndef __ASSEMBLY__
   8 #ifndef __KERNEL__
   9 #ifndef __EXPORTED_HEADERS__
  10 #warning "Attempt to use kernel headers from user space, see https://kernelnewbies.org/KernelHeaders"
  11 #endif /* __EXPORTED_HEADERS__ */
  12 #endif
  13
  14 #include <linux/posix_types.h>
  15
  16 #ifdef __SIZEOF_INT128__
  17 typedef __signed__ __int128 __s128 __attribute__((aligned(16)));
  18 typedef unsigned __int128 __u128 __attribute__((aligned(16)));
  19 #endif
  20
  21 /*
  22  * Below are truly Linux-specific types that should never collide with
  23  * any application/library that wants linux/types.h.
  24  */
  25
  26 /* sparse defines __CHECKER__; see Documentation/dev-tools/sparse.rst */
  27 #ifdef __CHECKER__
  28 #define __bitwise       __attribute__((bitwise))
  29 #else
  30 #define __bitwise
  31 #endif
  32
  33 /* The kernel doesn't use this legacy form, but user space does */
  34 #define __bitwise__ __bitwise
  35
  36 typedef __u16 __bitwise __le16;
  37 typedef __u16 __bitwise __be16;
  38 typedef __u32 __bitwise __le32;
  39 typedef __u32 __bitwise __be32;
  40 typedef __u64 __bitwise __le64;
  41 typedef __u64 __bitwise __be64;
  42
  43 typedef __u16 __bitwise __sum16;
  44 typedef __u32 __bitwise __wsum;
  45
  46 /*
  47  * aligned_u64 should be used in defining kernel<->userspace ABIs to avoid
  48  * common 32/64-bit compat problems.
  49  * 64-bit values align to 4-byte boundaries on x86_32 (and possibly other
  50  * architectures) and to 8-byte boundaries on 64-bit architectures.  The new
  51  * aligned_64 type enforces 8-byte alignment so that structs containing
  52  * aligned_64 values have the same alignment on 32-bit and 64-bit architectures.
  53  * No conversions are necessary between 32-bit user-space and a 64-bit kernel.
  54  */
  55 #define __aligned_u64 __u64 __attribute__((aligned(8)))
  56 #define __aligned_s64 __s64 __attribute__((aligned(8)))
  57 #define __aligned_be64 __be64 __attribute__((aligned(8)))
  58 #define __aligned_le64 __le64 __attribute__((aligned(8)))
  59
  60 typedef unsigned __bitwise __poll_t;
  61
  62 #endif /*  __ASSEMBLY__ */
  63 #endif /* _UAPI_LINUX_TYPES_H */