xref: /linux/include/uapi/linux/types.h (revision c34e9ab9a612ee8b18273398ef75c207b01f516d)
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 */
64