arch/arm/include/asm/string.h

   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