1/*
 2 * Copyright (c) 2017, 2023 Apple Inc. All rights reserved.
 3 *
 4 * @APPLE_LICENSE_HEADER_START@
 5 *
 6 * This file contains Original Code and/or Modifications of Original Code
 7 * as defined in and that are subject to the Apple Public Source License
 8 * Version 2.0 (the 'License'). You may not use this file except in
 9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24#ifndef __STRINGS_H_
25# error "Never use <secure/_strings.h> directly; include <strings.h> instead."
26#endif
27
28#ifndef _SECURE__STRINGS_H_
29#define _SECURE__STRINGS_H_
30
31#include <sys/cdefs.h>
32#include <Availability.h>
33#include <secure/_common.h>
34
35#if _USE_FORTIFY_LEVEL > 0
36
37/* bcopy and bzero */
38
39/* Removed in Issue 7 */
40#if !defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE < 200809L
41
42#ifdef __LIBC_STAGED_BOUNDS_SAFETY_ATTRIBUTES
43
44static inline void
45__bcopy_ptrcheck(const void *_LIBC_SIZE(__n) __src, void *const _LIBC_SIZE(__n) __darwin_pass_obsz0 __dst, size_t __n) {
46	memmove(__dst, __src, __n);
47}
48
49static inline void
50__bzero_ptrcheck(void *const _LIBC_SIZE(__n) __darwin_pass_obsz0 __dst, size_t __n) {
51	memset(__dst, 0, __n);
52}
53
54#define __bcopy_chk_func __bcopy_ptrcheck
55#define __bzero_chk_func __bzero_ptrcheck
56
57#else
58
59#ifndef __has_builtin
60#define __undef__has_builtin
61#define __has_builtin(x) defined(__GNUC__)
62#endif
63
64#if __has_builtin(__builtin___memmove_chk)
65#define __bcopy_chk_func(src, dst, ...) \
66	__builtin___memmove_chk(dst, src, __VA_ARGS__, __darwin_obsz0 (dst))
67#endif
68
69#if __has_builtin(__builtin___memset_chk)
70#define __bzero_chk_func(dst, ...) \
71	__builtin___memset_chk(dst, 0, __VA_ARGS__, __darwin_obsz0 (dst))
72#endif
73
74#ifdef __undef__has_builtin
75#undef __undef__has_builtin
76#undef __has_builtin
77#endif
78
79#endif
80
81#ifdef __bcopy_chk_func
82#undef bcopy
83/* void	bcopy(const void *src, void *dst, size_t len) */
84#define bcopy(...) __bcopy_chk_func (__VA_ARGS__)
85#endif
86
87#ifdef __bzero_chk_func
88#undef bzero
89/* void	bzero(void *s, size_t n) */
90#define bzero(...) __bzero_chk_func (__VA_ARGS__)
91#endif
92
93#endif
94
95#endif /* _USE_FORTIFY_LEVEL > 0 */
96#endif /* _SECURE__STRINGS_H_ */