Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_ARM_STRING_H
3#define __ASM_ARM_STRING_H
4
5/*
6 * We don't do inline string functions, since the
7 * optimised inline asm versions are not small.
8 *
9 * The __underscore versions of some functions are for KASan to be able
10 * to replace them with instrumented versions.
11 */
12
13#define __HAVE_ARCH_STRRCHR
14extern char * strrchr(const char * s, int c);
15
16#define __HAVE_ARCH_STRCHR
17extern char * strchr(const char * s, int c);
18
19#define __HAVE_ARCH_MEMCPY
20extern void * memcpy(void *, const void *, __kernel_size_t);
21extern void *__memcpy(void *dest, const void *src, __kernel_size_t n);
22
23#define __HAVE_ARCH_MEMMOVE
24extern void * memmove(void *, const void *, __kernel_size_t);
25extern void *__memmove(void *dest, const void *src, __kernel_size_t n);
26
27#define __HAVE_ARCH_MEMCHR
28extern void * memchr(const void *, int, __kernel_size_t);
29
30#define __HAVE_ARCH_MEMSET
31extern void * memset(void *, int, __kernel_size_t);
32extern void *__memset(void *s, int c, __kernel_size_t n);
33
34#define __HAVE_ARCH_MEMSET32
35extern void *__memset32(uint32_t *, uint32_t v, __kernel_size_t);
36static inline void *memset32(uint32_t *p, uint32_t v, __kernel_size_t n)
37{
38 return __memset32(p, v, n * 4);
39}
40
41#define __HAVE_ARCH_MEMSET64
42extern void *__memset64(uint64_t *, uint32_t low, __kernel_size_t, uint32_t hi);
43static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
44{
45 if (IS_ENABLED(CONFIG_CPU_LITTLE_ENDIAN))
46 return __memset64(p, v, n * 8, v >> 32);
47 else
48 return __memset64(p, v >> 32, n * 8, v);
49}
50
51/*
52 * For files that are not instrumented (e.g. mm/slub.c) we
53 * must use non-instrumented versions of the mem*
54 * functions named __memcpy() etc. All such kernel code has
55 * been tagged with KASAN_SANITIZE_file.o = n, which means
56 * that the address sanitization argument isn't passed to the
57 * compiler, and __SANITIZE_ADDRESS__ is not set. As a result
58 * these defines kick in.
59 */
60#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
61#define memcpy(dst, src, len) __memcpy(dst, src, len)
62#define memmove(dst, src, len) __memmove(dst, src, len)
63#define memset(s, c, n) __memset(s, c, n)
64
65#ifndef __NO_FORTIFY
66#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
67#endif
68
69#endif
70
71#endif