diff options
Diffstat (limited to 'arch/arm/include/asm/string.h')
-rw-r--r-- | arch/arm/include/asm/string.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/arm/include/asm/string.h b/arch/arm/include/asm/string.h new file mode 100644 index 0000000000..6c607c68f3 --- /dev/null +++ b/arch/arm/include/asm/string.h @@ -0,0 +1,68 @@ +/* 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 |