1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _M68K_STRING_H_ 3 #define _M68K_STRING_H_ 4 5 #include <linux/types.h> 6 #include <linux/compiler.h> 7 8 #define __HAVE_ARCH_STRNLEN 9 static inline size_t strnlen(const char *s, size_t count) 10 { 11 const char *sc = s; 12 13 asm volatile ("\n" 14 "1: subq.l #1,%1\n" 15 " jcs 2f\n" 16 " tst.b (%0)+\n" 17 " jne 1b\n" 18 " subq.l #1,%0\n" 19 "2:" 20 : "+a" (sc), "+d" (count)); 21 return sc - s; 22 } 23 24 #define __HAVE_ARCH_STRNCPY 25 static inline char *strncpy(char *dest, const char *src, size_t n) 26 { 27 char *xdest = dest; 28 29 asm volatile ("\n" 30 " jra 2f\n" 31 "1: move.b (%1),(%0)+\n" 32 " jeq 2f\n" 33 " addq.l #1,%1\n" 34 "2: subq.l #1,%2\n" 35 " jcc 1b\n" 36 : "+a" (dest), "+a" (src), "+d" (n) 37 : : "memory"); 38 return xdest; 39 } 40 41 #define __HAVE_ARCH_MEMMOVE 42 extern void *memmove(void *, const void *, __kernel_size_t); 43 44 #define memcmp(d, s, n) __builtin_memcmp(d, s, n) 45 46 #define __HAVE_ARCH_MEMSET 47 extern void *memset(void *, int, __kernel_size_t); 48 #define memset(d, c, n) __builtin_memset(d, c, n) 49 50 #define __HAVE_ARCH_MEMCPY 51 extern void *memcpy(void *, const void *, __kernel_size_t); 52 #define memcpy(d, s, n) __builtin_memcpy(d, s, n) 53 54 #endif /* _M68K_STRING_H_ */ 55