1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/efi.h>
4#include <asm/efi.h>
5#include <asm/string.h>
6
7#include "efistub.h"
8
9#ifdef CONFIG_KASAN
10#undef memcpy
11#undef memmove
12#undef memset
13void *__memcpy(void *__dest, const void *__src, size_t __n) __alias(memcpy);
14void *__memmove(void *__dest, const void *__src, size_t count) __alias(memmove);
15void *__memset(void *s, int c, size_t count) __alias(memset);
16#endif
17
18void *memcpy(void *dst, const void *src, size_t len)
19{
20	efi_bs_call(copy_mem, dst, src, len);
21	return dst;
22}
23
24extern void *memmove(void *dst, const void *src, size_t len) __alias(memcpy);
25
26void *memset(void *dst, int c, size_t len)
27{
28	efi_bs_call(set_mem, dst, len, c & U8_MAX);
29	return dst;
30}
31
32/**
33 * memcmp - Compare two areas of memory
34 * @cs: One area of memory
35 * @ct: Another area of memory
36 * @count: The size of the area.
37 */
38#undef memcmp
39int memcmp(const void *cs, const void *ct, size_t count)
40{
41	const unsigned char *su1, *su2;
42	int res = 0;
43
44	for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
45		if ((res = *su1 - *su2) != 0)
46			break;
47	return res;
48}
49