linux/arch/x86/include/asm/string_64.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_STRING_64_H
#define _ASM_X86_STRING_64_H

#ifdef __KERNEL__
#include <linux/jump_label.h>

/* Written 2002 by Andi Kleen */

/* Even with __builtin_ the compiler may decide to use the out of line
   function. */

#if defined(__SANITIZE_MEMORY__) && defined(__NO_FORTIFY)
#include <linux/kmsan_string.h>
#endif

#define __HAVE_ARCH_MEMCPY …
extern void *memcpy(void *to, const void *from, size_t len);
extern void *__memcpy(void *to, const void *from, size_t len);

#define __HAVE_ARCH_MEMSET
void *memset(void *s, int c, size_t n);
void *__memset(void *s, int c, size_t n);

/*
 * KMSAN needs to instrument as much code as possible. Use C versions of
 * memsetXX() from lib/string.c under KMSAN.
 */
#if !defined(CONFIG_KMSAN)
#define __HAVE_ARCH_MEMSET16
static inline void *memset16(uint16_t *s, uint16_t v, size_t n)
{ … }

#define __HAVE_ARCH_MEMSET32
static inline void *memset32(uint32_t *s, uint32_t v, size_t n)
{ … }

#define __HAVE_ARCH_MEMSET64
static inline void *memset64(uint64_t *s, uint64_t v, size_t n)
{ … }
#endif

#define __HAVE_ARCH_MEMMOVE
void *memmove(void *dest, const void *src, size_t count);
void *__memmove(void *dest, const void *src, size_t count);

int memcmp(const void *cs, const void *ct, size_t count);
size_t strlen(const char *s);
char *strcpy(char *dest, const char *src);
char *strcat(char *dest, const char *src);
int strcmp(const char *cs, const char *ct);

#ifdef CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE
#define __HAVE_ARCH_MEMCPY_FLUSHCACHE …
void __memcpy_flushcache(void *dst, const void *src, size_t cnt);
static __always_inline void memcpy_flushcache(void *dst, const void *src, size_t cnt)
{ … }
#endif

#endif /* __KERNEL__ */

#endif /* _ASM_X86_STRING_64_H */