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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_ARM_STRING_H #define __ASM_ARM_STRING_H /* * We don't do inline string functions, since the * optimised inline asm versions are not small. * * The __underscore versions of some functions are for KASan to be able * to replace them with instrumented versions. */ #define __HAVE_ARCH_STRRCHR extern char * strrchr(const char * s, int c); #define __HAVE_ARCH_STRCHR extern char * strchr(const char * s, int c); #define __HAVE_ARCH_MEMCPY extern void * memcpy(void *, const void *, __kernel_size_t); extern void *__memcpy(void *dest, const void *src, __kernel_size_t n); #define __HAVE_ARCH_MEMMOVE extern void * memmove(void *, const void *, __kernel_size_t); extern void *__memmove(void *dest, const void *src, __kernel_size_t n); #define __HAVE_ARCH_MEMCHR extern void * memchr(const void *, int, __kernel_size_t); #define __HAVE_ARCH_MEMSET extern void * memset(void *, int, __kernel_size_t); extern void *__memset(void *s, int c, __kernel_size_t n); #define __HAVE_ARCH_MEMSET32 extern void *__memset32(uint32_t *, uint32_t v, __kernel_size_t); static inline void *memset32(uint32_t *p, uint32_t v, __kernel_size_t n) { return __memset32(p, v, n * 4); } #define __HAVE_ARCH_MEMSET64 extern void *__memset64(uint64_t *, uint32_t low, __kernel_size_t, uint32_t hi); static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n) { return __memset64(p, v, n * 8, v >> 32); } /* * For files that are not instrumented (e.g. mm/slub.c) we * must use non-instrumented versions of the mem* * functions named __memcpy() etc. All such kernel code has * been tagged with KASAN_SANITIZE_file.o = n, which means * that the address sanitization argument isn't passed to the * compiler, and __SANITIZE_ADDRESS__ is not set. As a result * these defines kick in. */ #if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) #define memcpy(dst, src, len) __memcpy(dst, src, len) #define memmove(dst, src, len) __memmove(dst, src, len) #define memset(s, c, n) __memset(s, c, n) #ifndef __NO_FORTIFY #define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */ #endif #endif #endif