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 13 void *__memcpy(void *__dest, const void *__src, size_t __n) __alias(memcpy); 14 void *__memmove(void *__dest, const void *__src, size_t count) __alias(memmove); 15 void *__memset(void *s, int c, size_t count) __alias(memset); 16 #endif 17 18 void *memcpy(void *dst, const void *src, size_t len) 19 { 20 efi_bs_call(copy_mem, dst, src, len); 21 return dst; 22 } 23 24 extern void *memmove(void *dst, const void *src, size_t len) __alias(memcpy); 25 26 void *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 39 int 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