1 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */ 1 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */
2 /* 2 /*
3 * Minimal errno definitions for NOLIBC 3 * Minimal errno definitions for NOLIBC
4 * Copyright (C) 2017-2022 Willy Tarreau <w@1w 4 * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
5 */ 5 */
6 6
7 #ifndef _NOLIBC_ERRNO_H 7 #ifndef _NOLIBC_ERRNO_H
8 #define _NOLIBC_ERRNO_H 8 #define _NOLIBC_ERRNO_H
9 9
10 #include <asm/errno.h> 10 #include <asm/errno.h>
11 11
>> 12 /* this way it will be removed if unused */
>> 13 static int errno;
>> 14
12 #ifndef NOLIBC_IGNORE_ERRNO 15 #ifndef NOLIBC_IGNORE_ERRNO
13 #define SET_ERRNO(v) do { errno = (v); } while 16 #define SET_ERRNO(v) do { errno = (v); } while (0)
14 int errno __attribute__((weak)); <<
15 #else 17 #else
16 #define SET_ERRNO(v) do { } while (0) 18 #define SET_ERRNO(v) do { } while (0)
17 #endif 19 #endif
18 20
19 21
20 /* errno codes all ensure that they will not c 22 /* errno codes all ensure that they will not conflict with a valid pointer
21 * because they all correspond to the highest 23 * because they all correspond to the highest addressable memory page.
22 */ 24 */
23 #define MAX_ERRNO 4095 25 #define MAX_ERRNO 4095
24 26
25 /* make sure to include all global symbols */ 27 /* make sure to include all global symbols */
26 #include "nolibc.h" 28 #include "nolibc.h"
27 29
28 #endif /* _NOLIBC_ERRNO_H */ 30 #endif /* _NOLIBC_ERRNO_H */
29 31
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