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 14 extern char * strrchr(const char * s, int c); 15 16 #define __HAVE_ARCH_STRCHR 17 extern char * strchr(const char * s, int c); 18 19 #define __HAVE_ARCH_MEMCPY 20 extern void * memcpy(void *, const void *, __kernel_size_t); 21 extern void *__memcpy(void *dest, const void *src, __kernel_size_t n); 22 23 #define __HAVE_ARCH_MEMMOVE 24 extern void * memmove(void *, const void *, __kernel_size_t); 25 extern void *__memmove(void *dest, const void *src, __kernel_size_t n); 26 27 #define __HAVE_ARCH_MEMCHR 28 extern void * memchr(const void *, int, __kernel_size_t); 29 30 #define __HAVE_ARCH_MEMSET 31 extern void * memset(void *, int, __kernel_size_t); 32 extern void *__memset(void *s, int c, __kernel_size_t n); 33 34 #define __HAVE_ARCH_MEMSET32 35 extern void *__memset32(uint32_t *, uint32_t v, __kernel_size_t); 36 static 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 42 extern void *__memset64(uint64_t *, uint32_t low, __kernel_size_t, uint32_t hi); 43 static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n) 44 { 45 return __memset64(p, v, n * 8, v >> 32); 46 } 47 48 /* 49 * For files that are not instrumented (e.g. mm/slub.c) we 50 * must use non-instrumented versions of the mem* 51 * functions named __memcpy() etc. All such kernel code has 52 * been tagged with KASAN_SANITIZE_file.o = n, which means 53 * that the address sanitization argument isn't passed to the 54 * compiler, and __SANITIZE_ADDRESS__ is not set. As a result 55 * these defines kick in. 56 */ 57 #if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) 58 #define memcpy(dst, src, len) __memcpy(dst, src, len) 59 #define memmove(dst, src, len) __memmove(dst, src, len) 60 #define memset(s, c, n) __memset(s, c, n) 61 62 #ifndef __NO_FORTIFY 63 #define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */ 64 #endif 65 66 #endif 67 68 #endif 69